cyclades.c 158.5 KB
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Linus Torvalds 已提交
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#undef	BLOCKMOVE
#define	Z_WAKE
#undef	Z_EXT_CHARS_IN_BUFFER

/*
 *  linux/drivers/char/cyclades.c
 *
 * This file contains the driver for the Cyclades async multiport
 * serial boards.
 *
 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
 * Currently maintained by Cyclades team <async@cyclades.com>.
 *
 * For Technical support and installation problems, please send e-mail
 * to support@cyclades.com.
 *
 * Much of the design and some of the code came from serial.c
 * which was copyright (C) 1991, 1992  Linus Torvalds.  It was
 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
 * and then fixed as suggested by Michael K. Johnson 12/12/92.
 *
 * This version supports shared IRQ's (only for PCI boards).
 *
 * $Log: cyclades.c,v $
 * Prevent users from opening non-existing Z ports.
 *
 * Revision 2.3.2.8   2000/07/06 18:14:16 ivan
 * Fixed the PCI detection function to work properly on Alpha systems.
 * Implemented support for TIOCSERGETLSR ioctl.
 * Implemented full support for non-standard baud rates.
 *
 * Revision 2.3.2.7   2000/06/01 18:26:34 ivan
 * Request PLX I/O region, although driver doesn't use it, to avoid
 * problems with other drivers accessing it.
 * Removed count for on-board buffer characters in cy_chars_in_buffer
 * (Cyclades-Z only).
 *
 * Revision 2.3.2.6   2000/05/05 13:56:05 ivan
 * Driver now reports physical instead of virtual memory addresses.
 * Masks were added to some Cyclades-Z read accesses.
 * Implemented workaround for PLX9050 bug that would cause a system lockup
 * in certain systems, depending on the MMIO addresses allocated to the
 * board.
 * Changed the Tx interrupt programming in the CD1400 chips to boost up
 * performance (Cyclom-Y only).
 * Code is now compliant with the new module interface (module_[init|exit]).
 * Make use of the PCI helper functions to access PCI resources.
 * Did some code "housekeeping".
 *
 * Revision 2.3.2.5   2000/01/19 14:35:33 ivan
 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
 *
 * Revision 2.3.2.4   2000/01/17 09:19:40 ivan
 * Fixed SMP locking in Cyclom-Y interrupt handler.
 *
 * Revision 2.3.2.3   1999/12/28 12:11:39 ivan
 * Added a new cyclades_card field called nports to allow the driver to
 * know the exact number of ports found by the Z firmware after its load;
 * RX buffer contention prevention logic on interrupt op mode revisited
 * (Cyclades-Z only);
 * Revisited printk's for Z debug;
 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
 *
 * Revision 2.3.2.2   1999/10/01 11:27:43 ivan
 * Fixed bug in cyz_poll that would make all ports but port 0 
 * unable to transmit/receive data (Cyclades-Z only);
 * Implemented logic to prevent the RX buffer from being stuck with data
 * due to a driver / firmware race condition in interrupt op mode
 * (Cyclades-Z only);
 * Fixed bug in block_til_ready logic that would lead to a system crash;
 * Revisited cy_close spinlock usage;
 *
 * Revision 2.3.2.1   1999/09/28 11:01:22 ivan
 * Revisited CONFIG_PCI conditional compilation for PCI board support;
 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
 * Removed CTS handling from the driver -- this is now completely handled
 * by the firmware (Cyclades-Z only);
 * Flush RX on-board buffers on a port open (Cyclades-Z only);
 * Fixed handling of ASYNC_SPD_* TTY flags;
 * Module unload now unmaps all memory area allocated by ioremap;
 *
 * Revision 2.3.1.1   1999/07/15 16:45:53 ivan
 * Removed CY_PROC conditional compilation;
 * Implemented SMP-awareness for the driver;
 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off] 
 * functions;
 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
 * (irq=NN) as parameters (only for ISA boards);
 * Fixed bug in set_line_char that would prevent the Cyclades-Z 
 * ports from being configured at speeds above 115.2Kbps;
 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
 * switching from working properly;
 * The driver now only prints IRQ info for the Cyclades-Z if it's 
 * configured to work in interrupt mode;
 *
 * Revision 2.2.2.3   1999/06/28 11:13:29 ivan
 * Added support for interrupt mode operation for the Z cards;
 * Removed the driver inactivity control for the Z;
 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when 
 * the Z firmware is not loaded yet;
 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of 
 * same functionality;
 * Implemented workaround for IRQ setting loss on the PCI configuration 
 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
 *
 * Revision 2.2.2.2  1999/05/14 17:18:15 ivan
 * /proc entry location changed to /proc/tty/driver/cyclades;
 * Added support to shared IRQ's (only for PCI boards);
 * Added support for Cobalt Qube2 systems;
 * IRQ [de]allocation scheme revisited;
 * BREAK implementation changed in order to make use of the 'break_ctl'
 * TTY facility;
 * Fixed typo in TTY structure field 'driver_name';
 * Included a PCI bridge reset and EEPROM reload in the board 
 * initialization code (for both Y and Z series).
 *
 * Revision 2.2.2.1  1999/04/08 16:17:43 ivan
 * Fixed a bug in cy_wait_until_sent that was preventing the port to be 
 * closed properly after a SIGINT;
 * Module usage counter scheme revisited;
 * Added support to the upcoming Y PCI boards (i.e., support to additional
 * PCI Device ID's).
 * 
 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
 * Removed all unnecessary page-alignement operations in ioremap calls
 * (ioremap is currently safe for these operations).
 *
 * Revision 2.2.1.9  1998/12/30 18:18:30 ivan
 * Changed access to PLX PCI bridge registers from I/O to MMIO, in 
 * order to make PLX9050-based boards work with certain motherboards.
 *
 * Revision 2.2.1.8  1998/11/13 12:46:20 ivan
 * cy_close function now resets (correctly) the tty->closing flag;
 * JIFFIES_DIFF macro fixed.
 *
 * Revision 2.2.1.7  1998/09/03 12:07:28 ivan
 * Fixed bug in cy_close function, which was not informing HW of
 * which port should have the reception disabled before doing so;
 * fixed Cyclom-8YoP hardware detection bug.
 *
 * Revision 2.2.1.6  1998/08/20 17:15:39 ivan
 * Fixed bug in cy_close function, which causes malfunction
 * of one of the first 4 ports when a higher port is closed
 * (Cyclom-Y only).
 *
 * Revision 2.2.1.5  1998/08/10 18:10:28 ivan
 * Fixed Cyclom-4Yo hardware detection bug.
 *
 * Revision 2.2.1.4  1998/08/04 11:02:50 ivan
 * /proc/cyclades implementation with great collaboration of 
 * Marc Lewis <marc@blarg.net>;
 * cyy_interrupt was changed to avoid occurrence of kernel oopses
 * during PPP operation.
 *
 * Revision 2.2.1.3  1998/06/01 12:09:10 ivan
 * General code review in order to comply with 2.1 kernel standards;
 * data loss prevention for slow devices revisited (cy_wait_until_sent
 * was created);
 * removed conditional compilation for new/old PCI structure support 
 * (now the driver only supports the new PCI structure).
 *
 * Revision 2.2.1.1  1998/03/19 16:43:12 ivan
 * added conditional compilation for new/old PCI structure support;
 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
 *
 * Revision 2.1.1.3  1998/03/16 18:01:12 ivan
 * cleaned up the data loss fix;
 * fixed XON/XOFF handling once more (Cyclades-Z);
 * general review of the driver routines;
 * introduction of a mechanism to prevent data loss with slow 
 * printers, by forcing a delay before closing the port.
 *
 * Revision 2.1.1.2  1998/02/17 16:50:00 ivan
 * fixed detection/handling of new CD1400 in Ye boards;
 * fixed XON/XOFF handling (Cyclades-Z);
 * fixed data loss caused by a premature port close;
 * introduction of a flag that holds the CD1400 version ID per port
 * (used by the CYGETCD1400VER new ioctl).
 *
 * Revision 2.1.1.1  1997/12/03 17:31:19 ivan
 * Code review for the module cleanup routine;
 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
 * includes anonymous changes regarding signal_pending.
 * 
 * Revision 2.1  1997/11/01 17:42:41 ivan
 * Changes in the driver to support Alpha systems (except 8Zo V_1);
 * BREAK fix for the Cyclades-Z boards;
 * driver inactivity control by FW implemented;
 * introduction of flag that allows driver to take advantage of 
 * a special CD1400 feature related to HW flow control;
 * added support for the CD1400  rev. J (Cyclom-Y boards);
 * introduction of ioctls to:
 *  - control the rtsdtr_inv flag (Cyclom-Y);
 *  - control the rflow flag (Cyclom-Y);
 *  - adjust the polling interval (Cyclades-Z);
 *
 * Revision 1.36.4.33  1997/06/27 19:00:00  ivan
 * Fixes related to kernel version conditional 
 * compilation.
 *  
 * Revision 1.36.4.32  1997/06/14 19:30:00  ivan
 * Compatibility issues between kernels 2.0.x and 
 * 2.1.x (mainly related to clear_bit function).
 *  
 * Revision 1.36.4.31  1997/06/03 15:30:00  ivan
 * Changes to define the memory window according to the 
 * board type.
 *  
 * Revision 1.36.4.30  1997/05/16 15:30:00  daniel
 * Changes to support new cycladesZ boards.
 *
 * Revision 1.36.4.29  1997/05/12 11:30:00  daniel
 * Merge of Bentson's and Daniel's version 1.36.4.28.
 * Corrects bug in cy_detect_pci: check if there are more
 * ports than the number of static structs allocated.
 * Warning message during initialization if this driver is
 * used with the new generation of cycladesZ boards.  Those
 * will be supported only in next release of the driver.
 * Corrects bug in cy_detect_pci and cy_detect_isa that
 * returned wrong number of VALID boards, when a cyclomY
 * was found with no serial modules connected.
 * Changes to use current (2.1.x) kernel subroutine names
 * and created macros for compilation with 2.0.x kernel,
 * instead of the other way around.
 *
 * Revision 1.36.4.28  1997/05/?? ??:00:00  bentson
 * Change queue_task_irq_off to queue_task_irq.
 * The inline function queue_task_irq_off (tqueue.h)
 * was removed from latest releases of 2.1.x kernel.
 * Use of macro __init to mark the initialization
 * routines, so memory can be reused.
 * Also incorporate implementation of critical region
 * in function cleanup_module() created by anonymous
 * linuxer.
 *
 * Revision 1.36.4.28  1997/04/25 16:00:00  daniel
 * Change to support new firmware that solves DCD problem:
 * application could fail to receive SIGHUP signal when DCD
 * varying too fast.
 *
 * Revision 1.36.4.27  1997/03/26 10:30:00  daniel
 * Changed for support linux versions 2.1.X.
 * Backward compatible with linux versions 2.0.X.
 * Corrected illegal use of filler field in
 * CH_CTRL struct.
 * Deleted some debug messages.
 *
 * Revision 1.36.4.26  1997/02/27 12:00:00  daniel
 * Included check for NULL tty pointer in cyz_poll.
 *
 * Revision 1.36.4.25  1997/02/26 16:28:30  bentson
 * Bill Foster at Blarg! Online services noticed that
 * some of the switch elements of -Z modem control
 * lacked a closing "break;"
 *
 * Revision 1.36.4.24  1997/02/24 11:00:00  daniel
 * Changed low water threshold for buffer xmit_buf
 *
 * Revision 1.36.4.23  1996/12/02 21:50:16  bentson
 * Marcio provided fix to modem status fetch for -Z
 *
 * Revision 1.36.4.22  1996/10/28 22:41:17  bentson
 * improve mapping of -Z control page (thanks to Steve
 * Price <stevep@fa.tdktca.com> for help on this)
 *
 * Revision 1.36.4.21  1996/09/10 17:00:10  bentson
 * shift from CPU-bound to memcopy in cyz_polling operation
 *
 * Revision 1.36.4.20  1996/09/09 18:30:32  Bentson
 * Added support to set and report higher speeds.
 *
 * Revision 1.36.4.19c  1996/08/09 10:00:00  Marcio Saito
 * Some fixes in the HW flow control for the BETA release.
 * Don't try to register the IRQ.
 *
 * Revision 1.36.4.19  1996/08/08 16:23:18  Bentson
 * make sure "cyc" appears in all kernel messages; all soft interrupts
 * handled by same routine; recognize out-of-band reception; comment
 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
282
 * fix race condition in -Z buffer management; only -Y needs to explicitly
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 * flush chars; tidy up some startup messages;
 *
 * Revision 1.36.4.18  1996/07/25 18:57:31  bentson
 * shift MOD_INC_USE_COUNT location to match
 * serial.c; purge some diagnostic messages;
 *
 * Revision 1.36.4.17  1996/07/25 18:01:08  bentson
 * enable modem status messages and fetch & process them; note
 * time of last activity type for each port; set_line_char now
 * supports more than line 0 and treats 0 baud correctly;
 * get_modem_info senses rs_status;
 *
 * Revision 1.36.4.16  1996/07/20 08:43:15  bentson
 * barely works--now's time to turn on
 * more features 'til it breaks
 *
 * Revision 1.36.4.15  1996/07/19 22:30:06  bentson
 * check more -Z board status; shorten boot message
 *
 * Revision 1.36.4.14  1996/07/19 22:20:37  bentson
 * fix reference to ch_ctrl in startup; verify return
 * values from cyz_issue_cmd and cyz_update_channel;
 * more stuff to get modem control correct;
 *
 * Revision 1.36.4.13  1996/07/11 19:53:33  bentson
 * more -Z stuff folded in; re-order changes to put -Z stuff
 * after -Y stuff (to make changes clearer)
 *
 * Revision 1.36.4.12  1996/07/11 15:40:55  bentson
 * Add code to poll Cyclades-Z.  Add code to get & set RS-232 control.
 * Add code to send break.  Clear firmware ID word at startup (so
 * that other code won't talk to inactive board).
 *
 * Revision 1.36.4.11  1996/07/09 05:28:29  bentson
 * add code for -Z in set_line_char
 *
 * Revision 1.36.4.10  1996/07/08 19:28:37  bentson
 * fold more -Z stuff (or in some cases, error messages)
 * into driver; add text to "don't know what to do" messages.
 *
 * Revision 1.36.4.9  1996/07/08 18:38:38  bentson
 * moved compile-time flags near top of file; cosmetic changes
 * to narrow text (to allow 2-up printing); changed many declarations
 * to "static" to limit external symbols; shuffled code order to
 * coalesce -Y and -Z specific code, also to put internal functions
 * in order of tty_driver structure; added code to recognize -Z
 * ports (and for moment, do nothing or report error); add cy_startup
 * to parse boot command line for extra base addresses for ISA probes;
 *
 * Revision 1.36.4.8  1996/06/25 17:40:19  bentson
 * reorder some code, fix types of some vars (int vs. long),
 * add cy_setup to support user declared ISA addresses
 *
 * Revision 1.36.4.7  1996/06/21 23:06:18  bentson
 * dump ioctl based firmware load (it's now a user level
 * program); ensure uninitialzed ports cannot be used
 *
 * Revision 1.36.4.6  1996/06/20 23:17:19  bentson
 * rename vars and restructure some code
 *
 * Revision 1.36.4.5  1996/06/14 15:09:44  bentson
 * get right status back after boot load
 *
 * Revision 1.36.4.4  1996/06/13 19:51:44  bentson
 * successfully loads firmware
 *
 * Revision 1.36.4.3  1996/06/13 06:08:33  bentson
 * add more of the code for the boot/load ioctls
 *
 * Revision 1.36.4.2  1996/06/11 21:00:51  bentson
 * start to add Z functionality--starting with ioctl
 * for loading firmware
 *
 * Revision 1.36.4.1  1996/06/10 18:03:02  bentson
 * added code to recognize Z/PCI card at initialization; report
 * presence, but card is not initialized (because firmware needs
 * to be loaded)
 *
 * Revision 1.36.3.8  1996/06/07 16:29:00  bentson
 * starting minor number at zero; added missing verify_area
 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
 *
 * Revision 1.36.3.7  1996/04/19 21:06:18  bentson
 * remove unneeded boot message & fix CLOCAL hardware flow
 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
 * remove unused diagnostic statements; minor 0 is first;
 *
 * Revision 1.36.3.6  1996/03/13 13:21:17  marcio
 * The kernel function vremap (available only in later 1.3.xx kernels)
 * allows the access to memory addresses above the RAM. This revision
 * of the driver supports PCI boards below 1Mb (device id 0x100) and
 * above 1Mb (device id 0x101).
 *
 * Revision 1.36.3.5  1996/03/07 15:20:17  bentson
 * Some global changes to interrupt handling spilled into
 * this driver--mostly unused arguments in system function
 * calls.  Also added change by Marcio Saito which should
 * reduce lost interrupts at startup by fast processors.
 *
 * Revision 1.36.3.4  1995/11/13  20:45:10  bentson
 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
 * in 1.3.41 kernel to remove a possible race condition, extend
 * some error messages, and let the driver run as a loadable module
 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
 * possible race condition.
 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
 *
 * Revision 1.36.3.3  1995/11/13  19:44:48  bentson
 * Changes by Linus Torvalds in 1.3.33 kernel distribution
 * required due to reordering of driver initialization.
 * Drivers are now initialized *after* memory management.
 *
 * Revision 1.36.3.2  1995/09/08  22:07:14  bentson
 * remove printk from ISR; fix typo
 *
 * Revision 1.36.3.1  1995/09/01  12:00:42  marcio
 * Minor fixes in the PCI board support. PCI function calls in
 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
 * <duncan@okay.com>. "bad serial count" message removed.
 *
 * Revision 1.36.3  1995/08/22  09:19:42  marcio
 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
 * board initialization. Changes in the boot messages. The driver
 * supports up to 4 boards and 64 ports by default.
 *
 * Revision 1.36.1.4  1995/03/29  06:14:14  bentson
 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
 *
 * Revision 1.36.1.3  1995/03/23  22:15:35  bentson
 * add missing break in modem control block in ioctl switch statement
 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
 *
 * Revision 1.36.1.2  1995/03/22  19:16:22  bentson
 * make sure CTS flow control is set as soon as possible (thanks
 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
 *
 * Revision 1.36.1.1  1995/03/13  15:44:43  bentson
 * initialize defaults for receive threshold and stale data timeout;
 * cosmetic changes;
 *
 * Revision 1.36  1995/03/10  23:33:53  bentson
 * added support of chips 4-7 in 32 port Cyclom-Ye;
 * fix cy_interrupt pointer dereference problem
 * (Joe Portman <baron@aa.net>);
 * give better error response if open is attempted on non-existent port
 * (Zachariah Vaum <jchryslr@netcom.com>);
 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
 * conditional compilation for -16Y on systems with fast, noisy bus;
 * comment out diagnostic print function;
 * cleaned up table of base addresses;
 * set receiver time-out period register to correct value,
 * set receive threshold to better default values,
 * set chip timer to more accurate 200 Hz ticking,
 * add code to monitor and modify receive parameters
 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
 * <njs@scifi.emi.net>);
 *
 * Revision 1.35  1994/12/16  13:54:18  steffen
 * additional patch by Marcio Saito for board detection
 * Accidently left out in 1.34
 *
 * Revision 1.34  1994/12/10  12:37:12  steffen
 * This is the corrected version as suggested by Marcio Saito
 *
 * Revision 1.33  1994/12/01  22:41:18  bentson
 * add hooks to support more high speeds directly; add tytso
 * patch regarding CLOCAL wakeups
 *
 * Revision 1.32  1994/11/23  19:50:04  bentson
 * allow direct kernel control of higher signalling rates;
 * look for cards at additional locations
 *
 * Revision 1.31  1994/11/16  04:33:28  bentson
 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
 * a problem in chars_in_buffer has been resolved by some
 * small changes;  this should yield smoother output
 *
 * Revision 1.30  1994/11/16  04:28:05  bentson
 * Fix from Corey Minyard, Internet: minyard@metronet.com,
 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
 * cy_hangup that appears to clear up much (all?) of the
 * DTR glitches; also he's added/cleaned-up diagnostic messages
 *
 * Revision 1.29  1994/11/16  04:16:07  bentson
 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
 * operate higher speeds in same way as other serial ports;
 * add more serial ports (for up to two 16-port muxes).
 *
 * Revision 1.28  1994/11/04  00:13:16  root
 * turn off diagnostic messages
 *
 * Revision 1.27  1994/11/03  23:46:37  root
 * bunch of changes to bring driver into greater conformance
 * with the serial.c driver (looking for missed fixes)
 *
 * Revision 1.26  1994/11/03  22:40:36  root
 * automatic interrupt probing fixed.
 *
 * Revision 1.25  1994/11/03  20:17:02  root
 * start to implement auto-irq
 *
 * Revision 1.24  1994/11/03  18:01:55  root
 * still working on modem signals--trying not to drop DTR
 * during the getty/login processes
 *
 * Revision 1.23  1994/11/03  17:51:36  root
 * extend baud rate support; set receive threshold as function
 * of baud rate; fix some problems with RTS/CTS;
 *
 * Revision 1.22  1994/11/02  18:05:35  root
 * changed arguments to udelay to type long to get
 * delays to be of correct duration
 *
 * Revision 1.21  1994/11/02  17:37:30  root
 * employ udelay (after calibrating loops_per_second earlier
 * in init/main.c) instead of using home-grown delay routines
 *
 * Revision 1.20  1994/11/02  03:11:38  root
 * cy_chars_in_buffer forces a return value of 0 to let
 * login work (don't know why it does); some functions
 * that were returning EFAULT, now executes the code;
 * more work on deciding when to disable xmit interrupts;
 *
 * Revision 1.19  1994/11/01  20:10:14  root
 * define routine to start transmission interrupts (by enabling
 * transmit interrupts); directly enable/disable modem interrupts;
 *
 * Revision 1.18  1994/11/01  18:40:45  bentson
 * Don't always enable transmit interrupts in startup; interrupt on
 * TxMpty instead of TxRdy to help characters get out before shutdown;
 * restructure xmit interrupt to check for chars first and quit if
 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
 * (to my view);
 *
 * Revision 1.17  1994/10/30  04:39:45  bentson
 * rename serial_driver and callout_driver to cy_serial_driver and
 * cy_callout_driver to avoid linkage interference; initialize
 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
 * from cyclades_port structure; add paranoia check to cy_close;
 *
 * Revision 1.16  1994/10/30  01:14:33  bentson
 * change major numbers; add some _early_ return statements;
 *
 * Revision 1.15  1994/10/29  06:43:15  bentson
 * final tidying up for clean compile;  enable some error reporting
 *
 * Revision 1.14  1994/10/28  20:30:22  Bentson
 * lots of changes to drag the driver towards the new tty_io
 * structures and operation.  not expected to work, but may
 * compile cleanly.
 *
 * Revision 1.13  1994/07/21  23:08:57  Bentson
 * add some diagnostic cruft; support 24 lines (for testing
 * both -8Y and -16Y cards; be more thorough in servicing all
 * chips during interrupt; add "volatile" a few places to
 * circumvent compiler optimizations; fix base & offset
 * computations in block_til_ready (was causing chip 0 to
 * stop operation)
 *
 * Revision 1.12  1994/07/19  16:42:11  Bentson
 * add some hackery for kernel version 1.1.8; expand
 * error messages; refine timing for delay loops and
 * declare loop params volatile
 *
 * Revision 1.11  1994/06/11  21:53:10  bentson
 * get use of save_car right in transmit interrupt service
 *
 * Revision 1.10.1.1  1994/06/11  21:31:18  bentson
 * add some diagnostic printing; try to fix save_car stuff
 *
 * Revision 1.10  1994/06/11  20:36:08  bentson
 * clean up compiler warnings
 *
 * Revision 1.9  1994/06/11  19:42:46  bentson
 * added a bunch of code to support modem signalling
 *
 * Revision 1.8  1994/06/11  17:57:07  bentson
 * recognize break & parity error
 *
 * Revision 1.7  1994/06/05  05:51:34  bentson
 * Reorder baud table to be monotonic; add cli to CP; discard
 * incoming characters and status if the line isn't open; start to
 * fold code into cy_throttle; start to port get_serial_info,
 * set_serial_info, get_modem_info, set_modem_info, and send_break
 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
 * get flow control characters from tty struct; invalidate ports w/o
 * hardware;
 *
 * Revision 1.6  1994/05/31  18:42:21  bentson
 * add a loop-breaker in the interrupt service routine;
 * note when port is initialized so that it can be shut
 * down under the right conditions; receive works without
 * any obvious errors
 *
 * Revision 1.5  1994/05/30  00:55:02  bentson
 * transmit works without obvious errors
 *
 * Revision 1.4  1994/05/27  18:46:27  bentson
 * incorporated more code from lib_y.c; can now print short
 * strings under interrupt control to port zero; seems to
 * select ports/channels/lines correctly
 *
 * Revision 1.3  1994/05/25  22:12:44  bentson
 * shifting from multi-port on a card to proper multiplexor
 * data structures;  added skeletons of most routines
 *
 * Revision 1.2  1994/05/19  13:21:43  bentson
 * start to crib from other sources
 *
 */

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#define CY_VERSION	"2.4"

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/* If you need to install more boards than NR_CARDS, change the constant
   in the definition below. No other change is necessary to support up to
   eight boards. Beyond that you'll have to extend cy_isa_addresses. */

600
#define NR_CARDS	4
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/*
   If the total number of ports is larger than NR_PORTS, change this
   constant in the definition below. No other change is necessary to
   support more boards/ports. */

607
#define NR_PORTS	256
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#define ZE_V1_NPORTS	64
#define ZO_V1	0
#define ZO_V2	1
#define ZE_V1	2

#define	SERIAL_PARANOIA_CHECK
#undef	CY_DEBUG_OPEN
#undef	CY_DEBUG_THROTTLE
#undef	CY_DEBUG_OTHER
#undef	CY_DEBUG_IO
#undef	CY_DEBUG_COUNT
#undef	CY_DEBUG_DTR
#undef	CY_DEBUG_WAIT_UNTIL_SENT
#undef	CY_DEBUG_INTERRUPTS
#undef	CY_16Y_HACK
#undef	CY_ENABLE_MONITORING
#undef	CY_PCI_DEBUG

/*
 * Include section 
 */
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/serial.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/fcntl.h>
#include <linux/ptrace.h>
#include <linux/cyclades.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/bitops.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>

#define	CY_LOCK(info,flags)					\
		do {						\
		spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
		} while (0)
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#define	CY_UNLOCK(info,flags)					\
		do {						\
		spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
		} while (0)

#include <linux/kernel.h>
#include <linux/pci.h>

#include <linux/stat.h>
#include <linux/proc_fs.h>

672 673
static void cy_throttle(struct tty_struct *tty);
static void cy_send_xchar(struct tty_struct *tty, char ch);
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#define IS_CYC_Z(card) ((card).num_chips == -1)

#define Z_FPGA_CHECK(card) \
678
	((readl(&((struct RUNTIME_9060 __iomem *) \
679
		((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
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#define ISZLOADED(card)	(((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
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			((card).ctl_addr))->mail_box_0)) || \
			Z_FPGA_CHECK(card)) && \
684
			(ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
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			((card).base_addr+ID_ADDRESS))->signature)))

#ifndef SERIAL_XMIT_SIZE
#define	SERIAL_XMIT_SIZE	(min(PAGE_SIZE, 4096))
#endif
#define WAKEUP_CHARS		256

#define STD_COM_FLAGS (0)

static struct tty_driver *cy_serial_driver;

#ifdef CONFIG_ISA
/* This is the address lookup table. The driver will probe for
   Cyclom-Y/ISA boards at all addresses in here. If you want the
   driver to probe addresses at a different address, add it to
   this table.  If the driver is probing some other board and
   causing problems, remove the offending address from this table.
   The cy_setup function extracts additional addresses from the
   boot options line.  The form is "cyclades=address,address..."
*/

static unsigned int cy_isa_addresses[] = {
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	0xD0000,
	0xD2000,
	0xD4000,
	0xD6000,
	0xD8000,
	0xDA000,
	0xDC000,
	0xDE000,
	0, 0, 0, 0, 0, 0, 0, 0
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};
717

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#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
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#ifdef MODULE
static long maddr[NR_CARDS] = { 0, };
722
static int irq[NR_CARDS] = { 0, };
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module_param_array(maddr, long, NULL, 0);
module_param_array(irq, int, NULL, 0);
#endif

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#endif				/* CONFIG_ISA */
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/* This is the per-card data structure containing address, irq, number of
   channels, etc. This driver supports a maximum of NR_CARDS cards.
*/
static struct cyclades_card cy_card[NR_CARDS];

/* This is the per-channel data structure containing pointers, flags
 and variables for the port. This driver supports a maximum of NR_PORTS.
*/
static struct cyclades_port cy_port[NR_PORTS];

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static int cy_next_channel;	/* next minor available */
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/*
 * This is used to look up the divisor speeds and the timeouts
 * We're normally limited to 15 distinct baud rates.  The extra
 * are accessed via settings in info->flags.
 *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
 *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
 *                                               HI            VHI
 *     20
 */
static int baud_table[] = {
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	0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
	1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
	230400, 0
};

static char baud_co_25[] = {	/* 25 MHz clock option table */
	/* value =>    00    01   02    03    04 */
	/* divide by    8    32   128   512  2048 */
	0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
	0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

static char baud_bpr_25[] = {	/* 25 MHz baud rate period table */
	0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
	0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
};

static char baud_co_60[] = {	/* 60 MHz clock option table (CD1400 J) */
	/* value =>    00    01   02    03    04 */
	/* divide by    8    32   128   512  2048 */
	0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
	0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00
};

static char baud_bpr_60[] = {	/* 60 MHz baud rate period table (CD1400 J) */
	0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
	0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
	0x21
};

static char baud_cor3[] = {	/* receive threshold */
	0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
	0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
	0x07
};
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/*
 * The Cyclades driver implements HW flow control as any serial driver.
 * The cyclades_port structure member rflow and the vector rflow_thr 
 * allows us to take advantage of a special feature in the CD1400 to avoid 
 * data loss even when the system interrupt latency is too high. These flags 
 * are to be used only with very special applications. Setting these flags 
 * requires the use of a special cable (DTR and RTS reversed). In the new 
 * CD1400-based boards (rev. 6.00 or later), there is no need for special 
 * cables.
 */

800 801 802 803 804
static char rflow_thr[] = {	/* rflow threshold */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
	0x0a
};
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/*  The Cyclom-Ye has placed the sequential chips in non-sequential
 *  address order.  This look-up table overcomes that problem.
 */
809 810 811 812 813 814 815 816 817
static int cy_chip_offset[] = { 0x0000,
	0x0400,
	0x0800,
	0x0C00,
	0x0200,
	0x0600,
	0x0A00,
	0x0E00
};
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/* PCI related definitions */

#ifdef CONFIG_PCI
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static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },	/* PCI < 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },	/* PCI > 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },	/* 4Y PCI < 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },	/* 4Y PCI > 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },	/* 8Y PCI < 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },	/* 8Y PCI > 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },	/* Z PCI < 1Mb */
	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },	/* Z PCI > 1Mb */
	{ }			/* end of table */
832
};
833
MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
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#endif

static void cy_start(struct tty_struct *);
static void set_line_char(struct cyclades_port *);
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static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
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#ifdef CONFIG_ISA
static unsigned detect_isa_irq(void __iomem *);
841
#endif				/* CONFIG_ISA */
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static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
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#ifndef CONFIG_CYZ_INTR
static void cyz_poll(unsigned long);

/* The Cyclades-Z polling cycle is defined by this variable */
static long cyz_polling_cycle = CZ_DEF_POLL;

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static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
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#else				/* CONFIG_CYZ_INTR */
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static void cyz_rx_restart(unsigned long);
static struct timer_list cyz_rx_full_timer[NR_PORTS];
856
#endif				/* CONFIG_CYZ_INTR */
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static inline int serial_paranoia_check(struct cyclades_port *info,
		char *name, const char *routine)
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{
#ifdef SERIAL_PARANOIA_CHECK
862
	if (!info) {
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		printk("cyc Warning: null cyclades_port for (%s) in %s\n",
				name, routine);
865 866 867 868 869
		return 1;
	}

	if ((long)info < (long)(&cy_port[0]) ||
			(long)(&cy_port[NR_PORTS]) < (long)info) {
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		printk("cyc Warning: cyclades_port out of range for (%s) in "
				"%s\n", name, routine);
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		return 1;
	}

	if (info->magic != CYCLADES_MAGIC) {
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		printk("cyc Warning: bad magic number for serial struct (%s) "
				"in %s\n", name, routine);
878 879
		return 1;
	}
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#endif
881 882
	return 0;
}				/* serial_paranoia_check */
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/*
 * This routine is used by the interrupt handler to schedule
 * processing in the software interrupt portion of the driver
 * (also known as the "bottom half").  This can be called any
 * number of times for any channel without harm.
 */
890
static inline void cy_sched_event(struct cyclades_port *info, int event)
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{
892 893 894
	info->event |= 1 << event; /* remember what kind of event and who */
	schedule_work(&info->tqueue);
}				/* cy_sched_event */
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/*
 * This routine is used to handle the "bottom half" processing for the
 * serial driver, known also the "software interrupt" processing.
 * This processing is done at the kernel interrupt level, after the
 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON.  This
 * is where time-consuming activities which can not be done in the
 * interrupt driver proper are done; the interrupt driver schedules
 * them using cy_sched_event(), and they get done here.
 *
 * This is done through one level of indirection--the task queue.
 * When a hardware interrupt service routine wants service by the
 * driver's bottom half, it enqueues the appropriate tq_struct (one
 * per port) to the keventd work queue and sets a request flag
 * that the work queue be processed.
 *
 * Although this may seem unwieldy, it gives the system a way to
 * pass an argument (in this case the pointer to the cyclades_port
 * structure) to the bottom half of the driver.  Previous kernels
 * had to poll every port to see if that port needed servicing.
 */
static void
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do_softint(struct work_struct *work)
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{
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	struct cyclades_port *info =
		container_of(work, struct cyclades_port, tqueue);
921 922 923 924 925 926 927 928 929 930 931 932 933
	struct tty_struct    *tty;

	tty = info->tty;
	if (!tty)
		return;

	if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
		tty_hangup(info->tty);
		wake_up_interruptible(&info->open_wait);
		        info->flags &= ~ASYNC_NORMAL_ACTIVE;
	}
	if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
		wake_up_interruptible(&info->open_wait);
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#ifdef CONFIG_CYZ_INTR
935 936 937 938 939 940 941 942
	if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
		if (cyz_rx_full_timer[info->line].function == NULL) {
			cyz_rx_full_timer[info->line].expires = jiffies + 1;
			cyz_rx_full_timer[info->line].function = cyz_rx_restart;
			cyz_rx_full_timer[info->line].data =
						(unsigned long)info;
			add_timer(&cyz_rx_full_timer[info->line]);
		}
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	}
#endif
945 946 947
	if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
		wake_up_interruptible(&info->delta_msr_wait);
	tty_wakeup(tty);
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#ifdef Z_WAKE
949 950
	if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
		wake_up_interruptible(&info->shutdown_wait);
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#endif
} /* do_softint */


/***********************************************************/
/********* Start of block of Cyclom-Y specific code ********/

/* This routine waits up to 1000 micro-seconds for the previous
   command to the Cirrus chip to complete and then issues the
   new command.  An error is returned if the previous command
   didn't finish within the time limit.

   This function is only called from inside spinlock-protected code.
 */
965
static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
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{
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	unsigned int i;
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969 970
	/* Check to see that the previous command has completed */
	for (i = 0; i < 100; i++) {
971
		if (readb(base_addr + (CyCCR << index)) == 0) {
972 973 974
			break;
		}
		udelay(10L);
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	}
976 977 978
	/* if the CCR never cleared, the previous command
	   didn't finish within the "reasonable time" */
	if (i == 100)
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		return -1;
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981 982
	/* Issue the new command */
	cy_writeb(base_addr + (CyCCR << index), cmd);
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	return 0;
985
}				/* cyy_issue_cmd */
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#ifdef CONFIG_ISA
/* ISA interrupt detection code */
989
static unsigned detect_isa_irq(void __iomem * address)
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{
991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013
	int irq;
	unsigned long irqs, flags;
	int save_xir, save_car;
	int index = 0;		/* IRQ probing is only for ISA */

	/* forget possible initially masked and pending IRQ */
	irq = probe_irq_off(probe_irq_on());

	/* Clear interrupts on the board first */
	cy_writeb(address + (Cy_ClrIntr << index), 0);
	/* Cy_ClrIntr is 0x1800 */

	irqs = probe_irq_on();
	/* Wait ... */
	udelay(5000L);

	/* Enable the Tx interrupts on the CD1400 */
	local_irq_save(flags);
	cy_writeb(address + (CyCAR << index), 0);
	cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);

	cy_writeb(address + (CyCAR << index), 0);
	cy_writeb(address + (CySRER << index),
1014
		  readb(address + (CySRER << index)) | CyTxRdy);
1015 1016 1017 1018 1019 1020 1021 1022 1023
	local_irq_restore(flags);

	/* Wait ... */
	udelay(5000L);

	/* Check which interrupt is in use */
	irq = probe_irq_off(irqs);

	/* Clean up */
1024 1025
	save_xir = (u_char) readb(address + (CyTIR << index));
	save_car = readb(address + (CyCAR << index));
1026 1027
	cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
	cy_writeb(address + (CySRER << index),
1028
		  readb(address + (CySRER << index)) & ~CyTxRdy);
1029 1030 1031 1032 1033 1034
	cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
	cy_writeb(address + (CyCAR << index), (save_car));
	cy_writeb(address + (Cy_ClrIntr << index), 0);
	/* Cy_ClrIntr is 0x1800 */

	return (irq > 0) ? irq : 0;
L
Linus Torvalds 已提交
1035
}
1036
#endif				/* CONFIG_ISA */
L
Linus Torvalds 已提交
1037

1038
static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1039
			void __iomem * base_addr, int status, int index)
1040 1041 1042
{
	struct cyclades_port *info;
	struct tty_struct *tty;
J
Jiri Slaby 已提交
1043
	int char_count;
1044 1045 1046 1047
	int i, j, len, mdm_change, mdm_status, outch;
	int save_xir, channel, save_car;
	char data;

1048
	if (status & CySRReceive) {	/* reception interrupt */
1049
#ifdef CY_DEBUG_INTERRUPTS
1050
		printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
1051
#endif
1052 1053
		/* determine the channel & change to that context */
		spin_lock(&cinfo->card_lock);
1054
		save_xir = (u_char) readb(base_addr + (CyRIR << index));
1055 1056 1057 1058
		channel = (u_short) (save_xir & CyIRChannel);
		i = channel + chip * 4 + cinfo->first_line;
		info = &cy_port[i];
		info->last_active = jiffies;
1059
		save_car = readb(base_addr + (CyCAR << index));
1060 1061 1062 1063
		cy_writeb(base_addr + (CyCAR << index), save_xir);

		/* if there is nowhere to put the data, discard it */
		if (info->tty == 0) {
1064
			j = (readb(base_addr + (CyRIVR << index)) &
1065 1066
				CyIVRMask);
			if (j == CyIVRRxEx) {	/* exception */
1067
				data = readb(base_addr + (CyRDSR << index));
1068
			} else {	/* normal character reception */
1069
				char_count = readb(base_addr +
1070 1071
						(CyRDCR << index));
				while (char_count--) {
1072
					data = readb(base_addr +
1073
						(CyRDSR << index));
1074 1075
				}
			}
1076 1077
		} else {	/* there is an open port for this data */
			tty = info->tty;
1078
			j = (readb(base_addr + (CyRIVR << index)) &
1079 1080
					CyIVRMask);
			if (j == CyIVRRxEx) {	/* exception */
1081
				data = readb(base_addr + (CyRDSR << index));
1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101

				/* For statistics only */
				if (data & CyBREAK)
					info->icount.brk++;
				else if (data & CyFRAME)
					info->icount.frame++;
				else if (data & CyPARITY)
					info->icount.parity++;
				else if (data & CyOVERRUN)
					info->icount.overrun++;

				if (data & info->ignore_status_mask) {
					info->icount.rx++;
					return;
				}
				if (tty_buffer_request_room(tty, 1)) {
					if (data & info->read_status_mask) {
						if (data & CyBREAK) {
							tty_insert_flip_char(
								tty,
1102
								readb(
1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114
								base_addr +
								(CyRDSR <<
									index)),
								TTY_BREAK);
							info->icount.rx++;
							if (info->flags &
							    ASYNC_SAK) {
								do_SAK(tty);
							}
						} else if (data & CyFRAME) {
							tty_insert_flip_char(
								tty,
1115
								readb(
1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126
								base_addr +
								(CyRDSR <<
									index)),
								TTY_FRAME);
							info->icount.rx++;
							info->idle_stats.
								frame_errs++;
						} else if (data & CyPARITY) {
							/* Pieces of seven... */
							tty_insert_flip_char(
								tty,
1127
								readb(
1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145
								base_addr +
								(CyRDSR <<
									index)),
								TTY_PARITY);
							info->icount.rx++;
							info->idle_stats.
								parity_errs++;
						} else if (data & CyOVERRUN) {
							tty_insert_flip_char(
								tty, 0,
								TTY_OVERRUN);
							info->icount.rx++;
						/* If the flip buffer itself is
						   overflowing, we still lose
						   the next incoming character.
						 */
							tty_insert_flip_char(
								tty,
1146
								readb(
1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177
								base_addr +
								(CyRDSR <<
									index)),
								TTY_FRAME);
							info->icount.rx++;
							info->idle_stats.
								overruns++;
					/* These two conditions may imply */
					/* a normal read should be done. */
					/* }else if(data & CyTIMEOUT){ */
					/* }else if(data & CySPECHAR){ */
						} else {
							tty_insert_flip_char(
								tty, 0,
								TTY_NORMAL);
							info->icount.rx++;
						}
					} else {
						tty_insert_flip_char(tty, 0,
								TTY_NORMAL);
						info->icount.rx++;
					}
				} else {
					/* there was a software buffer
					   overrun and nothing could be
					   done about it!!! */
					info->icount.buf_overrun++;
					info->idle_stats.overruns++;
				}
			} else {	/* normal character reception */
				/* load # chars available from the chip */
1178
				char_count = readb(base_addr +
1179
						(CyRDCR << index));
1180 1181

#ifdef CY_ENABLE_MONITORING
1182 1183 1184 1185 1186
				++info->mon.int_count;
				info->mon.char_count += char_count;
				if (char_count > info->mon.char_max)
					info->mon.char_max = char_count;
				info->mon.char_last = char_count;
1187
#endif
1188 1189
				len = tty_buffer_request_room(tty, char_count);
				while (len--) {
1190
					data = readb(base_addr +
1191 1192 1193 1194 1195
							(CyRDSR << index));
					tty_insert_flip_char(tty, data,
							TTY_NORMAL);
					info->idle_stats.recv_bytes++;
					info->icount.rx++;
1196
#ifdef CY_16Y_HACK
1197
					udelay(10L);
1198
#endif
1199 1200 1201 1202
				}
				info->idle_stats.recv_idle = jiffies;
			}
			tty_schedule_flip(tty);
1203
		}
1204 1205 1206 1207
		/* end of service */
		cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
		cy_writeb(base_addr + (CyCAR << index), (save_car));
		spin_unlock(&cinfo->card_lock);
1208 1209
	}

1210 1211 1212 1213
	if (status & CySRTransmit) {	/* transmission interrupt */
		/* Since we only get here when the transmit buffer
		   is empty, we know we can always stuff a dozen
		   characters. */
1214
#ifdef CY_DEBUG_INTERRUPTS
1215
		printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
1216 1217
#endif

1218 1219
		/* determine the channel & change to that context */
		spin_lock(&cinfo->card_lock);
1220
		save_xir = (u_char) readb(base_addr + (CyTIR << index));
1221 1222
		channel = (u_short) (save_xir & CyIRChannel);
		i = channel + chip * 4 + cinfo->first_line;
1223
		save_car = readb(base_addr + (CyCAR << index));
1224 1225 1226 1227 1228
		cy_writeb(base_addr + (CyCAR << index), save_xir);

		/* validate the port# (as configured and open) */
		if ((i < 0) || (NR_PORTS <= i)) {
			cy_writeb(base_addr + (CySRER << index),
1229
				  readb(base_addr + (CySRER << index)) &
1230 1231
				  ~CyTxRdy);
			goto txend;
1232
		}
1233 1234 1235 1236
		info = &cy_port[i];
		info->last_active = jiffies;
		if (info->tty == 0) {
			cy_writeb(base_addr + (CySRER << index),
1237
				  readb(base_addr + (CySRER << index)) &
1238 1239
				  ~CyTxRdy);
			goto txdone;
1240
		}
1241 1242 1243 1244 1245 1246 1247 1248 1249 1250

		/* load the on-chip space for outbound data */
		char_count = info->xmit_fifo_size;

		if (info->x_char) {	/* send special char */
			outch = info->x_char;
			cy_writeb(base_addr + (CyTDR << index), outch);
			char_count--;
			info->icount.tx++;
			info->x_char = 0;
1251
		}
1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265

		if (info->breakon || info->breakoff) {
			if (info->breakon) {
				cy_writeb(base_addr + (CyTDR << index), 0);
				cy_writeb(base_addr + (CyTDR << index), 0x81);
				info->breakon = 0;
				char_count -= 2;
			}
			if (info->breakoff) {
				cy_writeb(base_addr + (CyTDR << index), 0);
				cy_writeb(base_addr + (CyTDR << index), 0x83);
				info->breakoff = 0;
				char_count -= 2;
			}
1266
		}
1267 1268 1269

		while (char_count-- > 0) {
			if (!info->xmit_cnt) {
1270
				if (readb(base_addr + (CySRER << index)) &
1271 1272
						CyTxMpty) {
					cy_writeb(base_addr + (CySRER << index),
1273
						readb(base_addr +
1274 1275 1276 1277
							(CySRER << index)) &
						~CyTxMpty);
				} else {
					cy_writeb(base_addr + (CySRER << index),
1278
						(readb(base_addr +
1279 1280 1281 1282 1283 1284 1285
						  	(CySRER << index)) &
						~CyTxRdy) | CyTxMpty);
				}
				goto txdone;
			}
			if (info->xmit_buf == 0) {
				cy_writeb(base_addr + (CySRER << index),
1286
					readb(base_addr + (CySRER << index)) &
1287 1288 1289 1290 1291
					~CyTxRdy);
				goto txdone;
			}
			if (info->tty->stopped || info->tty->hw_stopped) {
				cy_writeb(base_addr + (CySRER << index),
1292
					readb(base_addr + (CySRER << index)) &
1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327
					~CyTxRdy);
				goto txdone;
			}
			/* Because the Embedded Transmit Commands have
			   been enabled, we must check to see if the
			   escape character, NULL, is being sent.  If it
			   is, we must ensure that there is room for it
			   to be doubled in the output stream.  Therefore
			   we no longer advance the pointer when the
			   character is fetched, but rather wait until
			   after the check for a NULL output character.
			   This is necessary because there may not be
			   room for the two chars needed to send a NULL.)
			 */
			outch = info->xmit_buf[info->xmit_tail];
			if (outch) {
				info->xmit_cnt--;
				info->xmit_tail = (info->xmit_tail + 1) &
						(SERIAL_XMIT_SIZE - 1);
				cy_writeb(base_addr + (CyTDR << index), outch);
				info->icount.tx++;
			} else {
				if (char_count > 1) {
					info->xmit_cnt--;
					info->xmit_tail = (info->xmit_tail + 1)&
						(SERIAL_XMIT_SIZE - 1);
					cy_writeb(base_addr + (CyTDR << index),
						outch);
					cy_writeb(base_addr + (CyTDR << index),
						0);
					info->icount.tx++;
					char_count--;
				} else {
				}
			}
1328 1329 1330
		}

txdone:
1331 1332 1333
		if (info->xmit_cnt < WAKEUP_CHARS) {
			cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
		}
1334
txend:
1335 1336 1337 1338
		/* end of service */
		cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
		cy_writeb(base_addr + (CyCAR << index), (save_car));
		spin_unlock(&cinfo->card_lock);
1339 1340
	}

1341
	if (status & CySRModem) {	/* modem interrupt */
1342

1343 1344
		/* determine the channel & change to that context */
		spin_lock(&cinfo->card_lock);
1345
		save_xir = (u_char) readb(base_addr + (CyMIR << index));
1346 1347 1348
		channel = (u_short) (save_xir & CyIRChannel);
		info = &cy_port[channel + chip * 4 + cinfo->first_line];
		info->last_active = jiffies;
1349
		save_car = readb(base_addr + (CyCAR << index));
1350 1351
		cy_writeb(base_addr + (CyCAR << index), save_xir);

1352 1353
		mdm_change = readb(base_addr + (CyMISR << index));
		mdm_status = readb(base_addr + (CyMSVR1 << index));
1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369

		if (info->tty == 0) {	/* no place for data, ignore it */
			;
		} else {
			if (mdm_change & CyANY_DELTA) {
				/* For statistics only */
				if (mdm_change & CyDCD)
					info->icount.dcd++;
				if (mdm_change & CyCTS)
					info->icount.cts++;
				if (mdm_change & CyDSR)
					info->icount.dsr++;
				if (mdm_change & CyRI)
					info->icount.rng++;

				cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1370
			}
1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389

			if ((mdm_change & CyDCD) &&
					(info->flags & ASYNC_CHECK_CD)) {
				if (mdm_status & CyDCD) {
					cy_sched_event(info,
							Cy_EVENT_OPEN_WAKEUP);
				} else {
					cy_sched_event(info, Cy_EVENT_HANGUP);
				}
			}
			if ((mdm_change & CyCTS) &&
					(info->flags & ASYNC_CTS_FLOW)) {
				if (info->tty->hw_stopped) {
					if (mdm_status & CyCTS) {
						/* cy_start isn't used
						   because... !!! */
						info->tty->hw_stopped = 0;
						cy_writeb(base_addr +
							(CySRER << index),
1390
							readb(base_addr +
1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403
								(CySRER <<
									index))|
							CyTxRdy);
						cy_sched_event(info,
							Cy_EVENT_WRITE_WAKEUP);
					}
				} else {
					if (!(mdm_status & CyCTS)) {
						/* cy_stop isn't used
						   because ... !!! */
						info->tty->hw_stopped = 1;
						cy_writeb(base_addr +
							(CySRER << index),
1404
							readb(base_addr +
1405 1406 1407 1408 1409 1410 1411 1412 1413
								(CySRER <<
								index)) &
							~CyTxRdy);
					}
				}
			}
			if (mdm_change & CyDSR) {
			}
			if (mdm_change & CyRI) {
1414 1415
			}
		}
1416 1417 1418 1419
		/* end of service */
		cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
		cy_writeb(base_addr + (CyCAR << index), save_car);
		spin_unlock(&cinfo->card_lock);
1420 1421 1422
	}
}

L
Linus Torvalds 已提交
1423 1424 1425 1426
/* The real interrupt service routine is called
   whenever the card wants its hand held--chars
   received, out buffer empty, modem change, etc.
 */
1427
static irqreturn_t cyy_interrupt(int irq, void *dev_id)
L
Linus Torvalds 已提交
1428
{
1429 1430 1431 1432 1433 1434 1435 1436 1437
	int status;
	struct cyclades_card *cinfo;
	void __iomem *base_addr, *card_base_addr;
	int chip;
	int index;
	int too_many;
	int had_work;

	if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
L
Linus Torvalds 已提交
1438
#ifdef CY_DEBUG_INTERRUPTS
1439
		printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
L
Linus Torvalds 已提交
1440
#endif
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457
		return IRQ_NONE;	/* spurious interrupt */
	}

	card_base_addr = cinfo->base_addr;
	index = cinfo->bus_index;

	/* This loop checks all chips in the card.  Make a note whenever
	   _any_ chip had some work to do, as this is considered an
	   indication that there will be more to do.  Only when no chip
	   has any work does this outermost loop exit.
	 */
	do {
		had_work = 0;
		for (chip = 0; chip < cinfo->num_chips; chip++) {
			base_addr = cinfo->base_addr +
					(cy_chip_offset[chip] << index);
			too_many = 0;
1458
			while ((status = readb(base_addr +
1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481
						(CySVRR << index))) != 0x00) {
				had_work++;
			/* The purpose of the following test is to ensure that
			   no chip can monopolize the driver.  This forces the
			   chips to be checked in a round-robin fashion (after
			   draining each of a bunch (1000) of characters).
			 */
				if (1000 < too_many++) {
					break;
				}
				cyy_intr_chip(cinfo, chip, base_addr, status,
						index);
			}
		}
	} while (had_work);

	/* clear interrupts */
	spin_lock(&cinfo->card_lock);
	cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
	/* Cy_ClrIntr is 0x1800 */
	spin_unlock(&cinfo->card_lock);
	return IRQ_HANDLED;
}				/* cyy_interrupt */
L
Linus Torvalds 已提交
1482 1483 1484 1485 1486 1487 1488

/***********************************************************/
/********* End of block of Cyclom-Y specific code **********/
/******** Start of block of Cyclades-Z specific code *********/
/***********************************************************/

static int
1489
cyz_fetch_msg(struct cyclades_card *cinfo,
K
Klaus Kudielka 已提交
1490
		__u32 * channel, __u8 * cmd, __u32 * param)
L
Linus Torvalds 已提交
1491
{
1492 1493 1494 1495 1496 1497 1498
	struct FIRM_ID __iomem *firm_id;
	struct ZFW_CTRL __iomem *zfw_ctrl;
	struct BOARD_CTRL __iomem *board_ctrl;
	unsigned long loc_doorbell;

	firm_id = cinfo->base_addr + ID_ADDRESS;
	if (!ISZLOADED(*cinfo)) {
J
Jiri Slaby 已提交
1499
		return -1;
1500
	}
1501
	zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1502 1503
	board_ctrl = &zfw_ctrl->board_ctrl;

1504
	loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1505 1506 1507
				  (cinfo->ctl_addr))->loc_doorbell);
	if (loc_doorbell) {
		*cmd = (char)(0xff & loc_doorbell);
1508 1509
		*channel = readl(&board_ctrl->fwcmd_channel);
		*param = (__u32) readl(&board_ctrl->fwcmd_param);
1510 1511 1512 1513 1514 1515
		cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
			  loc_doorbell, 0xffffffff);
		return 1;
	}
	return 0;
}				/* cyz_fetch_msg */
L
Linus Torvalds 已提交
1516 1517

static int
1518
cyz_issue_cmd(struct cyclades_card *cinfo,
K
Klaus Kudielka 已提交
1519
		__u32 channel, __u8 cmd, __u32 param)
L
Linus Torvalds 已提交
1520
{
1521 1522 1523
	struct FIRM_ID __iomem *firm_id;
	struct ZFW_CTRL __iomem *zfw_ctrl;
	struct BOARD_CTRL __iomem *board_ctrl;
K
Klaus Kudielka 已提交
1524
	__u32 __iomem *pci_doorbell;
1525 1526 1527 1528
	int index;

	firm_id = cinfo->base_addr + ID_ADDRESS;
	if (!ISZLOADED(*cinfo)) {
J
Jiri Slaby 已提交
1529
		return -1;
1530
	}
1531
	zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1532 1533 1534 1535 1536
	board_ctrl = &zfw_ctrl->board_ctrl;

	index = 0;
	pci_doorbell =
	    &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1537
	while ((readl(pci_doorbell) & 0xff) != 0) {
1538
		if (index++ == 1000) {
1539
			return (int)(readl(pci_doorbell) & 0xff);
1540 1541 1542 1543 1544 1545 1546
		}
		udelay(50L);
	}
	cy_writel(&board_ctrl->hcmd_channel, channel);
	cy_writel(&board_ctrl->hcmd_param, param);
	cy_writel(pci_doorbell, (long)cmd);

J
Jiri Slaby 已提交
1547
	return 0;
1548
}				/* cyz_issue_cmd */
L
Linus Torvalds 已提交
1549 1550

static void
J
Jiri Slaby 已提交
1551 1552
cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
		struct BUF_CTRL __iomem *buf_ctrl)
L
Linus Torvalds 已提交
1553
{
1554 1555
	struct cyclades_card *cinfo = &cy_card[info->card];
	struct tty_struct *tty = info->tty;
J
Jiri Slaby 已提交
1556
	int char_count;
1557
	int len;
L
Linus Torvalds 已提交
1558
#ifdef BLOCKMOVE
1559
	int small_count;
L
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1560
#else
1561
	char data;
L
Linus Torvalds 已提交
1562
#endif
J
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1563
	__u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
L
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1564

1565 1566 1567 1568
	rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
	rx_put = readl(&buf_ctrl->rx_put);
	rx_bufsize = readl(&buf_ctrl->rx_bufsize);
	rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1569 1570 1571 1572
	if (rx_put >= rx_get)
		char_count = rx_put - rx_get;
	else
		char_count = rx_put - rx_get + rx_bufsize;
L
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1573

1574 1575 1576
	if (char_count) {
		info->last_active = jiffies;
		info->jiffies[1] = jiffies;
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1577 1578

#ifdef CY_ENABLE_MONITORING
1579 1580 1581 1582 1583
		info->mon.int_count++;
		info->mon.char_count += char_count;
		if (char_count > info->mon.char_max)
			info->mon.char_max = char_count;
		info->mon.char_last = char_count;
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1584
#endif
1585 1586 1587 1588 1589 1590
		if (tty == 0) {
			/* flush received characters */
			new_rx_get = (new_rx_get + char_count) &
					(rx_bufsize - 1);
			info->rflush_count++;
		} else {
L
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1591
#ifdef BLOCKMOVE
1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614
		/* we'd like to use memcpy(t, f, n) and memset(s, c, count)
		   for performance, but because of buffer boundaries, there
		   may be several steps to the operation */
			while (0 < (small_count = min_t(unsigned int,
					rx_bufsize - new_rx_get,
					min_t(unsigned int, TTY_FLIPBUF_SIZE -
						tty->flip.count, char_count)))){
				memcpy_fromio(tty->flip.char_buf_ptr,
					(char *)(cinfo->base_addr + rx_bufaddr +
						new_rx_get),
					small_count);

				tty->flip.char_buf_ptr += small_count;
				memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
					small_count);
				tty->flip.flag_buf_ptr += small_count;
				new_rx_get = (new_rx_get + small_count) &
						(rx_bufsize - 1);
				char_count -= small_count;
				info->icount.rx += small_count;
				info->idle_stats.recv_bytes += small_count;
				tty->flip.count += small_count;
			}
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1615
#else
1616 1617
			len = tty_buffer_request_room(tty, char_count);
			while (len--) {
1618
				data = readb(cinfo->base_addr + rx_bufaddr +
1619 1620 1621 1622 1623 1624
						new_rx_get);
				new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
				tty_insert_flip_char(tty, data, TTY_NORMAL);
				info->idle_stats.recv_bytes++;
				info->icount.rx++;
			}
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1625 1626
#endif
#ifdef CONFIG_CYZ_INTR
1627 1628
		/* Recalculate the number of chars in the RX buffer and issue
		   a cmd in case it's higher than the RX high water mark */
1629
			rx_put = readl(&buf_ctrl->rx_put);
1630 1631 1632 1633
			if (rx_put >= rx_get)
				char_count = rx_put - rx_get;
			else
				char_count = rx_put - rx_get + rx_bufsize;
1634
			if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
1635 1636
				cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
			}
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1637
#endif
1638 1639 1640 1641 1642
			info->idle_stats.recv_idle = jiffies;
			tty_schedule_flip(tty);
		}
		/* Update rx_get */
		cy_writel(&buf_ctrl->rx_get, new_rx_get);
L
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1643 1644 1645 1646
	}
}

static void
J
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1647 1648
cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
		struct BUF_CTRL __iomem *buf_ctrl)
L
Linus Torvalds 已提交
1649
{
1650 1651 1652
	struct cyclades_card *cinfo = &cy_card[info->card];
	struct tty_struct *tty = info->tty;
	char data;
J
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1653
	int char_count;
L
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1654
#ifdef BLOCKMOVE
1655
	int small_count;
L
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1656
#endif
J
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1657
	__u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
L
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1658

1659 1660
	if (info->xmit_cnt <= 0)	/* Nothing to transmit */
		return;
L
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1661

1662 1663 1664 1665
	tx_get = readl(&buf_ctrl->tx_get);
	tx_put = readl(&buf_ctrl->tx_put);
	tx_bufsize = readl(&buf_ctrl->tx_bufsize);
	tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1666 1667 1668 1669
	if (tx_put >= tx_get)
		char_count = tx_get - tx_put - 1 + tx_bufsize;
	else
		char_count = tx_get - tx_put - 1;
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1671
	if (char_count) {
L
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1673 1674 1675
		if (tty == 0) {
			goto ztxdone;
		}
L
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1676

1677 1678
		if (info->x_char) {	/* send special char */
			data = info->x_char;
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1679

1680 1681 1682 1683 1684 1685 1686 1687
			cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
			tx_put = (tx_put + 1) & (tx_bufsize - 1);
			info->x_char = 0;
			char_count--;
			info->icount.tx++;
			info->last_active = jiffies;
			info->jiffies[2] = jiffies;
		}
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1688
#ifdef BLOCKMOVE
1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708
		while (0 < (small_count = min_t(unsigned int,
				tx_bufsize - tx_put, min_t(unsigned int,
					(SERIAL_XMIT_SIZE - info->xmit_tail),
					min_t(unsigned int, info->xmit_cnt,
						char_count))))) {

			memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
					tx_put),
					&info->xmit_buf[info->xmit_tail],
					small_count);

			tx_put = (tx_put + small_count) & (tx_bufsize - 1);
			char_count -= small_count;
			info->icount.tx += small_count;
			info->xmit_cnt -= small_count;
			info->xmit_tail = (info->xmit_tail + small_count) &
					(SERIAL_XMIT_SIZE - 1);
			info->last_active = jiffies;
			info->jiffies[2] = jiffies;
		}
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1709
#else
1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722
		while (info->xmit_cnt && char_count) {
			data = info->xmit_buf[info->xmit_tail];
			info->xmit_cnt--;
			info->xmit_tail = (info->xmit_tail + 1) &
					(SERIAL_XMIT_SIZE - 1);

			cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
			tx_put = (tx_put + 1) & (tx_bufsize - 1);
			char_count--;
			info->icount.tx++;
			info->last_active = jiffies;
			info->jiffies[2] = jiffies;
		}
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1723
#endif
1724 1725 1726 1727 1728 1729
ztxdone:
		if (info->xmit_cnt < WAKEUP_CHARS) {
			cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
		}
		/* Update tx_put */
		cy_writel(&buf_ctrl->tx_put, tx_put);
L
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1730 1731 1732
	}
}

1733
static void cyz_handle_cmd(struct cyclades_card *cinfo)
L
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1734
{
1735 1736
	struct tty_struct *tty;
	struct cyclades_port *info;
J
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1737 1738 1739 1740 1741
	static struct FIRM_ID __iomem *firm_id;
	static struct ZFW_CTRL __iomem *zfw_ctrl;
	static struct BOARD_CTRL __iomem *board_ctrl;
	static struct CH_CTRL __iomem *ch_ctrl;
	static struct BUF_CTRL __iomem *buf_ctrl;
K
Klaus Kudielka 已提交
1742 1743 1744 1745
	__u32 channel;
	__u8 cmd;
	__u32 param;
	__u32 hw_ver, fw_ver;
1746 1747 1748 1749
	int special_count;
	int delta_count;

	firm_id = cinfo->base_addr + ID_ADDRESS;
1750
	zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1751
	board_ctrl = &zfw_ctrl->board_ctrl;
1752 1753
	fw_ver = readl(&board_ctrl->fw_version);
	hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1754 1755 1756 1757 1758 1759 1760 1761
			mail_box_0);

	while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
		special_count = 0;
		delta_count = 0;
		info = &cy_port[channel + cinfo->first_line];
		if ((tty = info->tty) == 0) {
			continue;
L
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		}
1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786
		ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
		buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);

		switch (cmd) {
		case C_CM_PR_ERROR:
			tty_insert_flip_char(tty, 0, TTY_PARITY);
			info->icount.rx++;
			special_count++;
			break;
		case C_CM_FR_ERROR:
			tty_insert_flip_char(tty, 0, TTY_FRAME);
			info->icount.rx++;
			special_count++;
			break;
		case C_CM_RXBRK:
			tty_insert_flip_char(tty, 0, TTY_BREAK);
			info->icount.rx++;
			special_count++;
			break;
		case C_CM_MDCD:
			info->icount.dcd++;
			delta_count++;
			if (info->flags & ASYNC_CHECK_CD) {
				if ((fw_ver > 241 ? ((u_long) param) :
1787
						readl(&ch_ctrl->rs_status)) &
1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807
						C_RS_DCD) {
					cy_sched_event(info,
						 	Cy_EVENT_OPEN_WAKEUP);
				} else {
					cy_sched_event(info, Cy_EVENT_HANGUP);
				}
			}
			break;
		case C_CM_MCTS:
			info->icount.cts++;
			delta_count++;
			break;
		case C_CM_MRI:
			info->icount.rng++;
			delta_count++;
			break;
		case C_CM_MDSR:
			info->icount.dsr++;
			delta_count++;
			break;
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1808
#ifdef Z_WAKE
1809 1810 1811
		case C_CM_IOCTLW:
			cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
			break;
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1812 1813
#endif
#ifdef CONFIG_CYZ_INTR
1814 1815 1816 1817
		case C_CM_RXHIWM:
		case C_CM_RXNNDT:
		case C_CM_INTBACK2:
			/* Reception Interrupt */
L
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1818
#ifdef CY_DEBUG_INTERRUPTS
1819 1820
			printk("cyz_interrupt: rcvd intr, card %d, "
					"port %ld\n\r", info->card, channel);
L
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1821
#endif
1822 1823 1824 1825 1826 1827
			cyz_handle_rx(info, ch_ctrl, buf_ctrl);
			break;
		case C_CM_TXBEMPTY:
		case C_CM_TXLOWWM:
		case C_CM_INTBACK:
			/* Transmission Interrupt */
L
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1828
#ifdef CY_DEBUG_INTERRUPTS
1829 1830
			printk("cyz_interrupt: xmit intr, card %d, "
					"port %ld\n\r", info->card, channel);
L
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1831
#endif
1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844
			cyz_handle_tx(info, ch_ctrl, buf_ctrl);
			break;
#endif				/* CONFIG_CYZ_INTR */
		case C_CM_FATAL:
			/* should do something with this !!! */
			break;
		default:
			break;
		}
		if (delta_count)
			cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
		if (special_count)
			tty_schedule_flip(tty);
L
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1845 1846 1847 1848
	}
}

#ifdef CONFIG_CYZ_INTR
1849
static irqreturn_t cyz_interrupt(int irq, void *dev_id)
L
Linus Torvalds 已提交
1850
{
1851
	struct cyclades_card *cinfo;
L
Linus Torvalds 已提交
1852

1853
	if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
L
Linus Torvalds 已提交
1854
#ifdef CY_DEBUG_INTERRUPTS
1855
		printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
L
Linus Torvalds 已提交
1856
#endif
1857 1858
		return IRQ_NONE;	/* spurious interrupt */
	}
L
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1859

1860
	if (!ISZLOADED(*cinfo)) {
L
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1861
#ifdef CY_DEBUG_INTERRUPTS
1862
		printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
L
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1863
#endif
1864 1865
		return IRQ_NONE;
	}
L
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1866

1867 1868
	/* Handle the interrupts */
	cyz_handle_cmd(cinfo);
L
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1869

1870 1871
	return IRQ_HANDLED;
}				/* cyz_interrupt */
L
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1872

1873
static void cyz_rx_restart(unsigned long arg)
L
Linus Torvalds 已提交
1874
{
1875 1876 1877
	struct cyclades_port *info = (struct cyclades_port *)arg;
	int retval;
	int card = info->card;
K
Klaus Kudielka 已提交
1878
	__u32 channel = (info->line) - (cy_card[card].first_line);
1879 1880 1881 1882 1883 1884 1885 1886 1887 1888
	unsigned long flags;

	CY_LOCK(info, flags);
	retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
	if (retval != 0) {
		printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
			info->line, retval);
	}
	cyz_rx_full_timer[info->line].function = NULL;
	CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
1889 1890
}

1891
#else				/* CONFIG_CYZ_INTR */
L
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1892

1893
static void cyz_poll(unsigned long arg)
L
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1894
{
1895 1896 1897
	struct cyclades_card *cinfo;
	struct cyclades_port *info;
	struct tty_struct *tty;
J
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1898 1899 1900 1901 1902
	static struct FIRM_ID *firm_id;
	static struct ZFW_CTRL *zfw_ctrl;
	static struct BOARD_CTRL *board_ctrl;
	static struct CH_CTRL *ch_ctrl;
	static struct BUF_CTRL *buf_ctrl;
J
Jiri Slaby 已提交
1903
	unsigned long expires = jiffies + HZ;
1904
	int card, port;
L
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1905

1906 1907 1908 1909 1910 1911 1912 1913 1914 1915
	for (card = 0; card < NR_CARDS; card++) {
		cinfo = &cy_card[card];

		if (!IS_CYC_Z(*cinfo))
			continue;
		if (!ISZLOADED(*cinfo))
			continue;

		firm_id = cinfo->base_addr + ID_ADDRESS;
		zfw_ctrl = cinfo->base_addr +
1916
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
1917
		board_ctrl = &(zfw_ctrl->board_ctrl);
L
Linus Torvalds 已提交
1918 1919

	/* Skip first polling cycle to avoid racing conditions with the FW */
1920
		if (!cinfo->intr_enabled) {
1921
			cinfo->nports = (int)readl(&board_ctrl->n_channel);
1922 1923 1924
			cinfo->intr_enabled = 1;
			continue;
		}
L
Linus Torvalds 已提交
1925

1926
		cyz_handle_cmd(cinfo);
L
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1927

1928 1929 1930 1931 1932
		for (port = 0; port < cinfo->nports; port++) {
			info = &cy_port[port + cinfo->first_line];
			tty = info->tty;
			ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
			buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
L
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1933

1934 1935 1936 1937 1938
			if (!info->throttle)
				cyz_handle_rx(info, ch_ctrl, buf_ctrl);
			cyz_handle_tx(info, ch_ctrl, buf_ctrl);
		}
		/* poll every 'cyz_polling_cycle' period */
J
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1939
		expires = jiffies + cyz_polling_cycle;
L
Linus Torvalds 已提交
1940
	}
J
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1941
	mod_timer(&cyz_timerlist, expires);
1942
}				/* cyz_poll */
L
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1943

1944
#endif				/* CONFIG_CYZ_INTR */
L
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1945 1946 1947 1948 1949 1950 1951

/********** End of block of Cyclades-Z specific code *********/
/***********************************************************/

/* This is called whenever a port becomes active;
   interrupts are enabled and DTR & RTS are turned on.
 */
1952
static int startup(struct cyclades_port *info)
L
Linus Torvalds 已提交
1953
{
1954 1955 1956 1957 1958
	unsigned long flags;
	int retval = 0;
	void __iomem *base_addr;
	int card, chip, channel, index;
	unsigned long page;
L
Linus Torvalds 已提交
1959

1960 1961
	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
L
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1962

1963 1964 1965
	page = get_zeroed_page(GFP_KERNEL);
	if (!page)
		return -ENOMEM;
L
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1966

1967
	CY_LOCK(info, flags);
L
Linus Torvalds 已提交
1968

1969 1970 1971 1972
	if (info->flags & ASYNC_INITIALIZED) {
		free_page(page);
		goto errout;
	}
L
Linus Torvalds 已提交
1973

1974 1975 1976 1977 1978 1979 1980
	if (!info->type) {
		if (info->tty) {
			set_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		free_page(page);
		goto errout;
	}
L
Linus Torvalds 已提交
1981

1982 1983 1984 1985
	if (info->xmit_buf)
		free_page(page);
	else
		info->xmit_buf = (unsigned char *)page;
L
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1986

1987
	CY_UNLOCK(info, flags);
L
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1988

1989
	set_line_char(info);
L
Linus Torvalds 已提交
1990

1991 1992 1993 1994 1995 1996
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr = cy_card[card].base_addr +
				(cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
1997 1998

#ifdef CY_DEBUG_OPEN
1999 2000 2001 2002
		printk("cyc startup card %d, chip %d, channel %d, "
				"base_addr %lx\n",
				card, chip, channel, (long)base_addr);
		/**/
L
Linus Torvalds 已提交
2003
#endif
2004
		CY_LOCK(info, flags);
L
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2005

2006
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
L
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2007

2008 2009 2010
		cy_writeb(base_addr + (CyRTPR << index),
			(info->default_timeout ? info->default_timeout : 0x02));
		/* 10ms rx timeout */
L
Linus Torvalds 已提交
2011

2012 2013
		cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
				index);
L
Linus Torvalds 已提交
2014

2015 2016 2017
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
		cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
		cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
L
Linus Torvalds 已提交
2018 2019

#ifdef CY_DEBUG_DTR
2020 2021
		printk("cyc:startup raising DTR\n");
		printk("     status: 0x%x, 0x%x\n",
2022 2023
			readb(base_addr + (CyMSVR1 << index)),
			readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
2024 2025
#endif

2026
		cy_writeb(base_addr + (CySRER << index),
2027
			readb(base_addr + (CySRER << index)) | CyRxData);
2028
		info->flags |= ASYNC_INITIALIZED;
L
Linus Torvalds 已提交
2029

2030 2031 2032 2033 2034 2035 2036 2037 2038
		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
		info->breakon = info->breakoff = 0;
		memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
		info->idle_stats.in_use =
		info->idle_stats.recv_idle =
		info->idle_stats.xmit_idle = jiffies;
L
Linus Torvalds 已提交
2039

2040
		CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
2041

2042 2043 2044 2045 2046 2047
	} else {
		struct FIRM_ID __iomem *firm_id;
		struct ZFW_CTRL __iomem *zfw_ctrl;
		struct BOARD_CTRL __iomem *board_ctrl;
		struct CH_CTRL __iomem *ch_ctrl;
		int retval;
L
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2048

2049
		base_addr = cy_card[card].base_addr;
L
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2050

2051 2052 2053 2054
		firm_id = base_addr + ID_ADDRESS;
		if (!ISZLOADED(cy_card[card])) {
			return -ENODEV;
		}
L
Linus Torvalds 已提交
2055

2056
		zfw_ctrl = cy_card[card].base_addr +
2057
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
2058 2059
		board_ctrl = &zfw_ctrl->board_ctrl;
		ch_ctrl = zfw_ctrl->ch_ctrl;
L
Linus Torvalds 已提交
2060 2061

#ifdef CY_DEBUG_OPEN
2062 2063 2064
		printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
			card, channel, (long)base_addr);
		/**/
L
Linus Torvalds 已提交
2065
#endif
2066
		CY_LOCK(info, flags);
L
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2067

2068
		cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
L
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2069 2070
#ifdef Z_WAKE
#ifdef CONFIG_CYZ_INTR
2071 2072 2073
		cy_writel(&ch_ctrl[channel].intr_enable,
			  C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
			  C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
L
Linus Torvalds 已提交
2074
#else
2075 2076 2077
		cy_writel(&ch_ctrl[channel].intr_enable,
			  C_IN_IOCTLW | C_IN_MDCD);
#endif				/* CONFIG_CYZ_INTR */
L
Linus Torvalds 已提交
2078 2079
#else
#ifdef CONFIG_CYZ_INTR
2080 2081 2082
		cy_writel(&ch_ctrl[channel].intr_enable,
			  C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
			  C_IN_RXNNDT | C_IN_MDCD);
L
Linus Torvalds 已提交
2083
#else
2084 2085 2086 2087 2088 2089 2090 2091 2092
		cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
#endif				/* CONFIG_CYZ_INTR */
#endif				/* Z_WAKE */

		retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
		if (retval != 0) {
			printk("cyc:startup(1) retval on ttyC%d was %x\n",
				info->line, retval);
		}
L
Linus Torvalds 已提交
2093

2094 2095 2096 2097 2098 2099 2100
		/* Flush RX buffers before raising DTR and RTS */
		retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
				0L);
		if (retval != 0) {
			printk("cyc:startup(2) retval on ttyC%d was %x\n",
				info->line, retval);
		}
L
Linus Torvalds 已提交
2101

2102 2103 2104
		/* set timeout !!! */
		/* set RTS and DTR !!! */
		cy_writel(&ch_ctrl[channel].rs_control,
2105
			readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2106 2107 2108 2109 2110 2111 2112
			C_RS_DTR);
		retval = cyz_issue_cmd(&cy_card[info->card], channel,
				C_CM_IOCTLM, 0L);
		if (retval != 0) {
			printk("cyc:startup(3) retval on ttyC%d was %x\n",
				info->line, retval);
		}
L
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2113
#ifdef CY_DEBUG_DTR
2114
		printk("cyc:startup raising Z DTR\n");
L
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2115 2116
#endif

2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128
		/* enable send, recv, modem !!! */

		info->flags |= ASYNC_INITIALIZED;
		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
		info->breakon = info->breakoff = 0;
		memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
		info->idle_stats.in_use =
		info->idle_stats.recv_idle =
		info->idle_stats.xmit_idle = jiffies;
L
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2129

2130
		CY_UNLOCK(info, flags);
L
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2131 2132 2133 2134 2135 2136 2137 2138 2139 2140
	}

#ifdef CY_DEBUG_OPEN
	printk(" cyc startup done\n");
#endif
	return 0;

errout:
	CY_UNLOCK(info, flags);
	return retval;
2141
}				/* startup */
L
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2142

2143
static void start_xmit(struct cyclades_port *info)
L
Linus Torvalds 已提交
2144
{
2145 2146 2147
	unsigned long flags;
	void __iomem *base_addr;
	int card, chip, channel, index;
L
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2148

2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160
	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr = cy_card[card].base_addr +
				(cy_chip_offset[chip] << index);

		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index), channel);
		cy_writeb(base_addr + (CySRER << index),
2161
			readb(base_addr + (CySRER << index)) | CyTxRdy);
2162 2163
		CY_UNLOCK(info, flags);
	} else {
L
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2164
#ifdef CONFIG_CYZ_INTR
2165
		int retval;
L
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2166

2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179
		CY_LOCK(info, flags);
		retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
				0L);
		if (retval != 0) {
			printk("cyc:start_xmit retval on ttyC%d was %x\n",
				info->line, retval);
		}
		CY_UNLOCK(info, flags);
#else				/* CONFIG_CYZ_INTR */
		/* Don't have to do anything at this time */
#endif				/* CONFIG_CYZ_INTR */
	}
}				/* start_xmit */
L
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2180 2181 2182 2183 2184

/*
 * This routine shuts down a serial port; interrupts are disabled,
 * and DTR is dropped if the hangup on close termio flag is on.
 */
2185
static void shutdown(struct cyclades_port *info)
L
Linus Torvalds 已提交
2186
{
2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202
	unsigned long flags;
	void __iomem *base_addr;
	int card, chip, channel, index;

	if (!(info->flags & ASYNC_INITIALIZED)) {
		return;
	}

	card = info->card;
	channel = info->line - cy_card[card].first_line;
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr = cy_card[card].base_addr +
				(cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
2203 2204

#ifdef CY_DEBUG_OPEN
2205 2206 2207
		printk("cyc shutdown Y card %d, chip %d, channel %d, "
				"base_addr %lx\n",
				card, chip, channel, (long)base_addr);
L
Linus Torvalds 已提交
2208 2209
#endif

2210 2211 2212 2213
		CY_LOCK(info, flags);

		/* Clear delta_msr_wait queue to avoid mem leaks. */
		wake_up_interruptible(&info->delta_msr_wait);
L
Linus Torvalds 已提交
2214

2215 2216 2217 2218 2219 2220 2221 2222 2223 2224
		if (info->xmit_buf) {
			unsigned char *temp;
			temp = info->xmit_buf;
			info->xmit_buf = NULL;
			free_page((unsigned long)temp);
		}
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
		if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
			cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
			cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
L
Linus Torvalds 已提交
2225
#ifdef CY_DEBUG_DTR
2226 2227
			printk("cyc shutdown dropping DTR\n");
			printk("     status: 0x%x, 0x%x\n",
2228 2229
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
2230
#endif
2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248
		}
		cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
		/* it may be appropriate to clear _XMIT at
		   some later date (after testing)!!! */

		if (info->tty) {
			set_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		info->flags &= ~ASYNC_INITIALIZED;
		CY_UNLOCK(info, flags);
	} else {
		struct FIRM_ID __iomem *firm_id;
		struct ZFW_CTRL __iomem *zfw_ctrl;
		struct BOARD_CTRL __iomem *board_ctrl;
		struct CH_CTRL __iomem *ch_ctrl;
		int retval;

		base_addr = cy_card[card].base_addr;
L
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2249
#ifdef CY_DEBUG_OPEN
2250 2251
		printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
			card, channel, (long)base_addr);
L
Linus Torvalds 已提交
2252 2253
#endif

2254 2255 2256 2257
		firm_id = base_addr + ID_ADDRESS;
		if (!ISZLOADED(cy_card[card])) {
			return;
		}
L
Linus Torvalds 已提交
2258

2259
		zfw_ctrl = cy_card[card].base_addr +
2260
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
2261 2262
		board_ctrl = &zfw_ctrl->board_ctrl;
		ch_ctrl = zfw_ctrl->ch_ctrl;
L
Linus Torvalds 已提交
2263

2264
		CY_LOCK(info, flags);
L
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2265

2266 2267 2268 2269 2270
		if (info->xmit_buf) {
			unsigned char *temp;
			temp = info->xmit_buf;
			info->xmit_buf = NULL;
			free_page((unsigned long)temp);
L
Linus Torvalds 已提交
2271
		}
2272 2273 2274

		if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
			cy_writel(&ch_ctrl[channel].rs_control,
2275
				(__u32)(readl(&ch_ctrl[channel].rs_control) &
2276 2277 2278 2279 2280 2281 2282
					~(C_RS_RTS | C_RS_DTR)));
			retval = cyz_issue_cmd(&cy_card[info->card], channel,
					C_CM_IOCTLM, 0L);
			if (retval != 0) {
				printk("cyc:shutdown retval on ttyC%d was %x\n",
					info->line, retval);
			}
L
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2283
#ifdef CY_DEBUG_DTR
2284
			printk("cyc:shutdown dropping Z DTR\n");
L
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2285
#endif
2286
		}
L
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2287

2288 2289 2290 2291 2292 2293 2294
		if (info->tty) {
			set_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		info->flags &= ~ASYNC_INITIALIZED;

		CY_UNLOCK(info, flags);
	}
L
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2295 2296

#ifdef CY_DEBUG_OPEN
2297
	printk(" cyc shutdown done\n");
L
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2298
#endif
2299
}				/* shutdown */
L
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2300 2301 2302 2303 2304 2305 2306 2307

/*
 * ------------------------------------------------------------
 * cy_open() and friends
 * ------------------------------------------------------------
 */

static int
2308 2309
block_til_ready(struct tty_struct *tty, struct file *filp,
		struct cyclades_port *info)
L
Linus Torvalds 已提交
2310
{
2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328
	DECLARE_WAITQUEUE(wait, current);
	struct cyclades_card *cinfo;
	unsigned long flags;
	int chip, channel, index;
	int retval;
	void __iomem *base_addr;

	cinfo = &cy_card[info->card];
	channel = info->line - cinfo->first_line;

	/*
	 * If the device is in the middle of being closed, then block
	 * until it's done, and then try again.
	 */
	if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
		if (info->flags & ASYNC_CLOSING) {
			interruptible_sleep_on(&info->close_wait);
		}
J
Jiri Slaby 已提交
2329
		return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
L
Linus Torvalds 已提交
2330
	}
2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349

	/*
	 * If non-blocking mode is set, then make the check up front
	 * and then exit.
	 */
	if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
		info->flags |= ASYNC_NORMAL_ACTIVE;
		return 0;
	}

	/*
	 * Block waiting for the carrier detect and the line to become
	 * free (i.e., not in use by the callout).  While we are in
	 * this loop, info->count is dropped by one, so that
	 * cy_close() knows when to free things.  We restore it upon
	 * exit, either normal or abnormal.
	 */
	retval = 0;
	add_wait_queue(&info->open_wait, &wait);
L
Linus Torvalds 已提交
2350
#ifdef CY_DEBUG_OPEN
2351 2352 2353
	printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
		info->line, info->count);
	/**/
L
Linus Torvalds 已提交
2354
#endif
2355 2356 2357 2358
	CY_LOCK(info, flags);
	if (!tty_hung_up_p(filp))
		info->count--;
	CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
2359
#ifdef CY_DEBUG_COUNT
2360 2361
	printk("cyc block_til_ready: (%d): decrementing count to %d\n",
		current->pid, info->count);
L
Linus Torvalds 已提交
2362
#endif
2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379
	info->blocked_open++;

	if (!IS_CYC_Z(*cinfo)) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cinfo->bus_index;
		base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);

		while (1) {
			CY_LOCK(info, flags);
			if ((tty->termios->c_cflag & CBAUD)) {
				cy_writeb(base_addr + (CyCAR << index),
					  (u_char) channel);
				cy_writeb(base_addr + (CyMSVR1 << index),
					  CyRTS);
				cy_writeb(base_addr + (CyMSVR2 << index),
					  CyDTR);
L
Linus Torvalds 已提交
2380
#ifdef CY_DEBUG_DTR
2381 2382
				printk("cyc:block_til_ready raising DTR\n");
				printk("     status: 0x%x, 0x%x\n",
2383 2384
					readb(base_addr + (CyMSVR1 << index)),
					readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
2385
#endif
2386 2387
			}
			CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
2388

2389 2390 2391 2392 2393 2394 2395
			set_current_state(TASK_INTERRUPTIBLE);
			if (tty_hung_up_p(filp) ||
					!(info->flags & ASYNC_INITIALIZED)) {
				retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
					  -EAGAIN : -ERESTARTSYS);
				break;
			}
L
Linus Torvalds 已提交
2396

2397 2398 2399 2400
			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2401
					(readb(base_addr +
2402 2403 2404 2405
						(CyMSVR1 << index)) & CyDCD))) {
				CY_UNLOCK(info, flags);
				break;
			}
L
Linus Torvalds 已提交
2406 2407
			CY_UNLOCK(info, flags);

2408 2409 2410 2411
			if (signal_pending(current)) {
				retval = -ERESTARTSYS;
				break;
			}
L
Linus Torvalds 已提交
2412
#ifdef CY_DEBUG_OPEN
2413 2414 2415 2416
			printk("cyc block_til_ready blocking: ttyC%d, "
					"count = %d\n",
					info->line, info->count);
			/**/
L
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2417
#endif
2418
			schedule();
L
Linus Torvalds 已提交
2419
		}
2420 2421 2422 2423 2424 2425 2426 2427 2428 2429
	} else {
		struct FIRM_ID __iomem *firm_id;
		struct ZFW_CTRL __iomem *zfw_ctrl;
		struct BOARD_CTRL __iomem *board_ctrl;
		struct CH_CTRL __iomem *ch_ctrl;
		int retval;

		base_addr = cinfo->base_addr;
		firm_id = base_addr + ID_ADDRESS;
		if (!ISZLOADED(*cinfo)) {
2430
			__set_current_state(TASK_RUNNING);
2431 2432 2433 2434
			remove_wait_queue(&info->open_wait, &wait);
			return -EINVAL;
		}

2435
		zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2436 2437 2438 2439 2440 2441
		board_ctrl = &zfw_ctrl->board_ctrl;
		ch_ctrl = zfw_ctrl->ch_ctrl;

		while (1) {
			if ((tty->termios->c_cflag & CBAUD)) {
				cy_writel(&ch_ctrl[channel].rs_control,
2442 2443
					readl(&ch_ctrl[channel].rs_control) |
					C_RS_RTS | C_RS_DTR);
2444
				retval = cyz_issue_cmd(&cy_card[info->card],
2445
					channel, C_CM_IOCTLM, 0L);
2446 2447 2448 2449 2450
				if (retval != 0) {
					printk("cyc:block_til_ready retval on "
						"ttyC%d was %x\n",
						info->line, retval);
				}
L
Linus Torvalds 已提交
2451
#ifdef CY_DEBUG_DTR
2452
				printk("cyc:block_til_ready raising Z DTR\n");
L
Linus Torvalds 已提交
2453
#endif
2454
			}
L
Linus Torvalds 已提交
2455

2456 2457 2458 2459 2460 2461 2462 2463
			set_current_state(TASK_INTERRUPTIBLE);
			if (tty_hung_up_p(filp) ||
					!(info->flags & ASYNC_INITIALIZED)) {
				retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
					  -EAGAIN : -ERESTARTSYS);
				break;
			}
			if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2464
					(readl(&ch_ctrl[channel].rs_status) &
2465 2466 2467 2468 2469 2470 2471
						C_RS_DCD))) {
				break;
			}
			if (signal_pending(current)) {
				retval = -ERESTARTSYS;
				break;
			}
L
Linus Torvalds 已提交
2472
#ifdef CY_DEBUG_OPEN
2473 2474 2475 2476
			printk("cyc block_til_ready blocking: ttyC%d, "
					"count = %d\n",
					info->line, info->count);
			/**/
L
Linus Torvalds 已提交
2477
#endif
2478 2479
			schedule();
		}
L
Linus Torvalds 已提交
2480
	}
2481
	__set_current_state(TASK_RUNNING);
2482 2483 2484
	remove_wait_queue(&info->open_wait, &wait);
	if (!tty_hung_up_p(filp)) {
		info->count++;
L
Linus Torvalds 已提交
2485
#ifdef CY_DEBUG_COUNT
2486 2487
		printk("cyc:block_til_ready (%d): incrementing count to %d\n",
			current->pid, info->count);
L
Linus Torvalds 已提交
2488
#endif
2489 2490
	}
	info->blocked_open--;
L
Linus Torvalds 已提交
2491
#ifdef CY_DEBUG_OPEN
2492 2493 2494
	printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
		info->line, info->count);
	/**/
L
Linus Torvalds 已提交
2495
#endif
2496 2497 2498 2499 2500
	if (retval)
		return retval;
	info->flags |= ASYNC_NORMAL_ACTIVE;
	return 0;
}				/* block_til_ready */
L
Linus Torvalds 已提交
2501 2502 2503 2504 2505

/*
 * This routine is called whenever a serial port is opened.  It
 * performs the serial-specific initialization for the tty structure.
 */
2506
static int cy_open(struct tty_struct *tty, struct file *filp)
L
Linus Torvalds 已提交
2507
{
2508 2509
	struct cyclades_port *info;
	int retval, line;
L
Linus Torvalds 已提交
2510

2511 2512 2513 2514 2515 2516 2517 2518
	line = tty->index;
	if ((line < 0) || (NR_PORTS <= line)) {
		return -ENODEV;
	}
	info = &cy_port[line];
	if (info->line < 0) {
		return -ENODEV;
	}
L
Linus Torvalds 已提交
2519

2520 2521 2522 2523 2524 2525 2526 2527 2528
	/* If the card's firmware hasn't been loaded,
	   treat it as absent from the system.  This
	   will make the user pay attention.
	 */
	if (IS_CYC_Z(cy_card[info->card])) {
		struct cyclades_card *cinfo = &cy_card[info->card];
		struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;

		if (!ISZLOADED(*cinfo)) {
2529
			if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2530 2531
					 (cinfo->ctl_addr))->mail_box_0)) &&
					Z_FPGA_CHECK(*cinfo)) &&
2532
					(ZFIRM_HLT == readl(
2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552
						&firm_id->signature))) {
				printk("cyc:Cyclades-Z Error: you need an "
					"external power supply for this number "
					"of ports.\n\rFirmware halted.\r\n");
			} else {
				printk("cyc:Cyclades-Z firmware not yet "
					"loaded\n");
			}
			return -ENODEV;
		}
#ifdef CONFIG_CYZ_INTR
		else {
		/* In case this Z board is operating in interrupt mode, its
		   interrupts should be enabled as soon as the first open
		   happens to one of its ports. */
			if (!cinfo->intr_enabled) {
				struct ZFW_CTRL __iomem *zfw_ctrl;
				struct BOARD_CTRL __iomem *board_ctrl;

				zfw_ctrl = cinfo->base_addr +
2553 2554
					(readl(&firm_id->zfwctrl_addr) &
					 0xfffff);
2555 2556 2557 2558 2559

				board_ctrl = &zfw_ctrl->board_ctrl;

				/* Enable interrupts on the PLX chip */
				cy_writew(cinfo->ctl_addr + 0x68,
2560
					readw(cinfo->ctl_addr + 0x68) | 0x0900);
2561 2562 2563 2564 2565 2566 2567 2568
				/* Enable interrupts on the FW */
				retval = cyz_issue_cmd(cinfo, 0,
						C_CM_IRQ_ENBL, 0L);
				if (retval != 0) {
					printk("cyc:IRQ enable retval was %x\n",
						retval);
				}
				cinfo->nports =
2569
					(int)readl(&board_ctrl->n_channel);
2570 2571
				cinfo->intr_enabled = 1;
			}
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2572
		}
2573 2574 2575 2576
#endif				/* CONFIG_CYZ_INTR */
		/* Make sure this Z port really exists in hardware */
		if (info->line > (cinfo->first_line + cinfo->nports - 1))
			return -ENODEV;
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2577 2578
	}
#ifdef CY_DEBUG_OTHER
2579
	printk("cyc:cy_open ttyC%d\n", info->line);	/* */
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2580
#endif
2581 2582 2583 2584 2585
	tty->driver_data = info;
	info->tty = tty;
	if (serial_paranoia_check(info, tty->name, "cy_open")) {
		return -ENODEV;
	}
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2586
#ifdef CY_DEBUG_OPEN
2587 2588
	printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
	/**/
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2589
#endif
2590
	info->count++;
L
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2591
#ifdef CY_DEBUG_COUNT
2592 2593
	printk("cyc:cy_open (%d): incrementing count to %d\n",
		current->pid, info->count);
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2594 2595
#endif

2596 2597 2598 2599 2600 2601
	/*
	 * If the port is the middle of closing, bail out now
	 */
	if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
		if (info->flags & ASYNC_CLOSING)
			interruptible_sleep_on(&info->close_wait);
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2602
		return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2603
	}
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2604

2605 2606 2607 2608 2609 2610 2611
	/*
	 * Start up serial port
	 */
	retval = startup(info);
	if (retval) {
		return retval;
	}
L
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2612

2613 2614
	retval = block_til_ready(tty, filp, info);
	if (retval) {
L
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2615
#ifdef CY_DEBUG_OPEN
2616 2617
		printk("cyc:cy_open returning after block_til_ready with %d\n",
			retval);
L
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2618
#endif
2619 2620
		return retval;
	}
L
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2621

2622
	info->throttle = 0;
L
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2623

2624 2625 2626 2627 2628 2629
#ifdef CY_DEBUG_OPEN
	printk(" cyc:cy_open done\n");
	/**/
#endif
	return 0;
}				/* cy_open */
L
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2630 2631 2632 2633

/*
 * cy_wait_until_sent() --- wait until the transmitter is empty
 */
2634
static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
L
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2635
{
2636
	struct cyclades_port *info = tty->driver_data;
2637 2638 2639 2640 2641 2642 2643 2644 2645 2646
	void __iomem *base_addr;
	int card, chip, channel, index;
	unsigned long orig_jiffies;
	int char_time;

	if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
		return;

	if (info->xmit_fifo_size == 0)
		return;		/* Just in case.... */
L
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2647

2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675
	orig_jiffies = jiffies;
	/*
	 * Set the check interval to be 1/5 of the estimated time to
	 * send a single character, and make it at least 1.  The check
	 * interval should also be less than the timeout.
	 *
	 * Note: we have to use pretty tight timings here to satisfy
	 * the NIST-PCTS.
	 */
	char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
	char_time = char_time / 5;
	if (char_time <= 0)
		char_time = 1;
	if (timeout < 0)
		timeout = 0;
	if (timeout)
		char_time = min(char_time, timeout);
	/*
	 * If the transmitter hasn't cleared in twice the approximate
	 * amount of time to send the entire FIFO, it probably won't
	 * ever clear.  This assumes the UART isn't doing flow
	 * control, which is currently the case.  Hence, if it ever
	 * takes longer than info->timeout, this is probably due to a
	 * UART bug of some kind.  So, we clamp the timeout parameter at
	 * 2*info->timeout.
	 */
	if (!timeout || timeout > 2 * info->timeout)
		timeout = 2 * info->timeout;
L
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2676
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
2677 2678
	printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
	printk("jiff=%lu...", jiffies);
L
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2679
#endif
2680 2681 2682 2683 2684 2685 2686 2687
	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);
2688
		while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
L
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2689
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
2690
			printk("Not clean (jiff=%lu)...", jiffies);
L
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2691
#endif
2692 2693 2694 2695 2696 2697 2698
			if (msleep_interruptible(jiffies_to_msecs(char_time)))
				break;
			if (timeout && time_after(jiffies, orig_jiffies +
					timeout))
				break;
		}
	} else {
J
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2699
		/* Nothing to do! */
L
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2700
	}
2701 2702
	/* Run one more char cycle */
	msleep_interruptible(jiffies_to_msecs(char_time * 5));
L
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2703
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
2704
	printk("Clean (jiff=%lu)...done\n", jiffies);
L
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2705 2706 2707 2708 2709 2710
#endif
}

/*
 * This routine is called when a particular tty device is closed.
 */
2711
static void cy_close(struct tty_struct *tty, struct file *filp)
L
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2712
{
2713
	struct cyclades_port *info = tty->driver_data;
2714
	unsigned long flags;
L
Linus Torvalds 已提交
2715 2716

#ifdef CY_DEBUG_OTHER
2717
	printk("cyc:cy_close ttyC%d\n", info->line);
L
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2718 2719
#endif

2720 2721 2722
	if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
		return;
	}
L
Linus Torvalds 已提交
2723

2724 2725 2726 2727 2728 2729
	CY_LOCK(info, flags);
	/* If the TTY is being hung up, nothing to do */
	if (tty_hung_up_p(filp)) {
		CY_UNLOCK(info, flags);
		return;
	}
L
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2730
#ifdef CY_DEBUG_OPEN
2731
	printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
L
Linus Torvalds 已提交
2732
#endif
2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744
	if ((tty->count == 1) && (info->count != 1)) {
		/*
		 * Uh, oh.  tty->count is 1, which means that the tty
		 * structure will be freed.  Info->count should always
		 * be one in these conditions.  If it's greater than
		 * one, we've got real problems, since it means the
		 * serial port won't be shutdown.
		 */
		printk("cyc:cy_close: bad serial port count; tty->count is 1, "
			"info->count is %d\n", info->count);
		info->count = 1;
	}
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2745
#ifdef CY_DEBUG_COUNT
2746 2747
	printk("cyc:cy_close at (%d): decrementing count to %d\n",
		current->pid, info->count - 1);
L
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2748
#endif
2749
	if (--info->count < 0) {
L
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2750
#ifdef CY_DEBUG_COUNT
2751
		printk("cyc:cyc_close setting count to 0\n");
L
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2752
#endif
2753
		info->count = 0;
L
Linus Torvalds 已提交
2754
	}
2755 2756 2757 2758 2759
	if (info->count) {
		CY_UNLOCK(info, flags);
		return;
	}
	info->flags |= ASYNC_CLOSING;
L
Linus Torvalds 已提交
2760

2761 2762 2763 2764 2765 2766 2767 2768
	/*
	 * Now we wait for the transmit buffer to clear; and we notify
	 * the line discipline to only process XON/XOFF characters.
	 */
	tty->closing = 1;
	CY_UNLOCK(info, flags);
	if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
		tty_wait_until_sent(tty, info->closing_wait);
L
Linus Torvalds 已提交
2769
	}
2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780
	CY_LOCK(info, flags);

	if (!IS_CYC_Z(cy_card[info->card])) {
		int channel = info->line - cy_card[info->card].first_line;
		int index = cy_card[info->card].bus_index;
		void __iomem *base_addr = cy_card[info->card].base_addr +
			(cy_chip_offset[channel >> 2] << index);
		/* Stop accepting input */
		channel &= 0x03;
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
		cy_writeb(base_addr + (CySRER << index),
2781
			  readb(base_addr + (CySRER << index)) & ~CyRxData);
2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794
		if (info->flags & ASYNC_INITIALIZED) {
			/* Waiting for on-board buffers to be empty before closing
			   the port */
			CY_UNLOCK(info, flags);
			cy_wait_until_sent(tty, info->timeout);
			CY_LOCK(info, flags);
		}
	} else {
#ifdef Z_WAKE
		/* Waiting for on-board buffers to be empty before closing the port */
		void __iomem *base_addr = cy_card[info->card].base_addr;
		struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
		struct ZFW_CTRL __iomem *zfw_ctrl =
2795
		    base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2796 2797 2798 2799
		struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
		int channel = info->line - cy_card[info->card].first_line;
		int retval;

2800
		if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2801 2802 2803 2804 2805 2806 2807 2808 2809 2810
			retval = cyz_issue_cmd(&cy_card[info->card], channel,
						C_CM_IOCTLW, 0L);
			if (retval != 0) {
				printk("cyc:cy_close retval on ttyC%d was %x\n",
					info->line, retval);
			}
			CY_UNLOCK(info, flags);
			interruptible_sleep_on(&info->shutdown_wait);
			CY_LOCK(info, flags);
		}
L
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2811
#endif
2812 2813
	}

L
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2814
	CY_UNLOCK(info, flags);
2815 2816 2817 2818
	shutdown(info);
	if (tty->driver->flush_buffer)
		tty->driver->flush_buffer(tty);
	tty_ldisc_flush(tty);
L
Linus Torvalds 已提交
2819
	CY_LOCK(info, flags);
2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834

	tty->closing = 0;
	info->event = 0;
	info->tty = NULL;
	if (info->blocked_open) {
		CY_UNLOCK(info, flags);
		if (info->close_delay) {
			msleep_interruptible(jiffies_to_msecs
						(info->close_delay));
		}
		wake_up_interruptible(&info->open_wait);
		CY_LOCK(info, flags);
	}
	info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
	wake_up_interruptible(&info->close_wait);
L
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2835 2836

#ifdef CY_DEBUG_OTHER
2837
	printk(" cyc:cy_close done\n");
L
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2838 2839
#endif

2840 2841
	CY_UNLOCK(info, flags);
}				/* cy_close */
L
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2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855

/* This routine gets called when tty_write has put something into
 * the write_queue.  The characters may come from user space or
 * kernel space.
 *
 * This routine will return the number of characters actually
 * accepted for writing.
 *
 * If the port is not already transmitting stuff, start it off by
 * enabling interrupts.  The interrupt service routine will then
 * ensure that the characters are sent.
 * If the port is already active, there is no need to kick it.
 *
 */
2856
static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
L
Linus Torvalds 已提交
2857
{
2858
	struct cyclades_port *info = tty->driver_data;
2859 2860
	unsigned long flags;
	int c, ret = 0;
L
Linus Torvalds 已提交
2861 2862

#ifdef CY_DEBUG_IO
2863
	printk("cyc:cy_write ttyC%d\n", info->line);	/* */
L
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2864 2865
#endif

2866 2867 2868
	if (serial_paranoia_check(info, tty->name, "cy_write")) {
		return 0;
	}
L
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2869

2870 2871
	if (!info->xmit_buf)
		return 0;
L
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2872

2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898
	CY_LOCK(info, flags);
	while (1) {
		c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
				   (int)(SERIAL_XMIT_SIZE - info->xmit_head)));

		if (c <= 0)
			break;

		memcpy(info->xmit_buf + info->xmit_head, buf, c);
		info->xmit_head = (info->xmit_head + c) &
			(SERIAL_XMIT_SIZE - 1);
		info->xmit_cnt += c;
		buf += c;
		count -= c;
		ret += c;
	}
	CY_UNLOCK(info, flags);

	info->idle_stats.xmit_bytes += ret;
	info->idle_stats.xmit_idle = jiffies;

	if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
		start_xmit(info);
	}
	return ret;
}				/* cy_write */
L
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2899 2900 2901 2902 2903 2904 2905 2906

/*
 * This routine is called by the kernel to write a single
 * character to the tty device.  If the kernel uses this routine,
 * it must call the flush_chars() routine (if defined) when it is
 * done stuffing characters into the driver.  If there is no room
 * in the queue, the character is ignored.
 */
2907
static void cy_put_char(struct tty_struct *tty, unsigned char ch)
L
Linus Torvalds 已提交
2908
{
2909
	struct cyclades_port *info = tty->driver_data;
2910
	unsigned long flags;
L
Linus Torvalds 已提交
2911 2912

#ifdef CY_DEBUG_IO
2913
	printk("cyc:cy_put_char ttyC%d\n", info->line);
L
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2914 2915
#endif

2916 2917
	if (serial_paranoia_check(info, tty->name, "cy_put_char"))
		return;
L
Linus Torvalds 已提交
2918

2919 2920
	if (!info->xmit_buf)
		return;
L
Linus Torvalds 已提交
2921

2922
	CY_LOCK(info, flags);
J
Jiri Slaby 已提交
2923
	if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2924 2925 2926
		CY_UNLOCK(info, flags);
		return;
	}
L
Linus Torvalds 已提交
2927

2928 2929 2930
	info->xmit_buf[info->xmit_head++] = ch;
	info->xmit_head &= SERIAL_XMIT_SIZE - 1;
	info->xmit_cnt++;
L
Linus Torvalds 已提交
2931 2932
	info->idle_stats.xmit_bytes++;
	info->idle_stats.xmit_idle = jiffies;
2933 2934
	CY_UNLOCK(info, flags);
}				/* cy_put_char */
L
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2935 2936 2937 2938 2939

/*
 * This routine is called by the kernel after it has written a
 * series of characters to the tty device using put_char().  
 */
2940
static void cy_flush_chars(struct tty_struct *tty)
L
Linus Torvalds 已提交
2941
{
2942
	struct cyclades_port *info = tty->driver_data;
2943

L
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2944
#ifdef CY_DEBUG_IO
2945
	printk("cyc:cy_flush_chars ttyC%d\n", info->line);	/* */
L
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2946 2947
#endif

2948 2949
	if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
		return;
L
Linus Torvalds 已提交
2950

2951 2952 2953
	if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
			!info->xmit_buf)
		return;
L
Linus Torvalds 已提交
2954

2955 2956
	start_xmit(info);
}				/* cy_flush_chars */
L
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2957 2958 2959 2960 2961 2962 2963

/*
 * This routine returns the numbers of characters the tty driver
 * will accept for queuing to be written.  This number is subject
 * to change as output buffers get emptied, or if the output flow
 * control is activated.
 */
2964
static int cy_write_room(struct tty_struct *tty)
L
Linus Torvalds 已提交
2965
{
2966
	struct cyclades_port *info = tty->driver_data;
2967 2968
	int ret;

L
Linus Torvalds 已提交
2969
#ifdef CY_DEBUG_IO
2970
	printk("cyc:cy_write_room ttyC%d\n", info->line);	/* */
L
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2971 2972
#endif

2973 2974 2975 2976 2977 2978 2979
	if (serial_paranoia_check(info, tty->name, "cy_write_room"))
		return 0;
	ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
	if (ret < 0)
		ret = 0;
	return ret;
}				/* cy_write_room */
L
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2980

2981
static int cy_chars_in_buffer(struct tty_struct *tty)
L
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2982
{
2983
	struct cyclades_port *info = tty->driver_data;
2984
	int card, channel;
L
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2985

2986 2987 2988 2989 2990
	if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
		return 0;

	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
L
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2991 2992

#ifdef Z_EXT_CHARS_IN_BUFFER
2993 2994
	if (!IS_CYC_Z(cy_card[card])) {
#endif				/* Z_EXT_CHARS_IN_BUFFER */
L
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2995
#ifdef CY_DEBUG_IO
2996
		printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt);	/* */
L
Linus Torvalds 已提交
2997
#endif
2998
		return info->xmit_cnt;
L
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2999
#ifdef Z_EXT_CHARS_IN_BUFFER
3000
	} else {
J
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3001 3002 3003 3004
		static struct FIRM_ID *firm_id;
		static struct ZFW_CTRL *zfw_ctrl;
		static struct CH_CTRL *ch_ctrl;
		static struct BUF_CTRL *buf_ctrl;
3005
		int char_count;
J
Jiri Slaby 已提交
3006
		__u32 tx_put, tx_get, tx_bufsize;
3007 3008 3009

		firm_id = cy_card[card].base_addr + ID_ADDRESS;
		zfw_ctrl = cy_card[card].base_addr +
3010
			(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3011 3012 3013
		ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
		buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);

3014 3015 3016
		tx_get = readl(&buf_ctrl->tx_get);
		tx_put = readl(&buf_ctrl->tx_put);
		tx_bufsize = readl(&buf_ctrl->tx_bufsize);
3017 3018 3019 3020
		if (tx_put >= tx_get)
			char_count = tx_put - tx_get;
		else
			char_count = tx_put - tx_get + tx_bufsize;
L
Linus Torvalds 已提交
3021
#ifdef CY_DEBUG_IO
3022
		printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count);	/* */
L
Linus Torvalds 已提交
3023
#endif
J
Jiri Slaby 已提交
3024
		return info->xmit_cnt + char_count;
3025 3026 3027
	}
#endif				/* Z_EXT_CHARS_IN_BUFFER */
}				/* cy_chars_in_buffer */
L
Linus Torvalds 已提交
3028 3029 3030 3031 3032 3033 3034

/*
 * ------------------------------------------------------------
 * cy_ioctl() and friends
 * ------------------------------------------------------------
 */

K
Klaus Kudielka 已提交
3035
static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
L
Linus Torvalds 已提交
3036
{
3037
	int co, co_val, bpr;
K
Klaus Kudielka 已提交
3038
	__u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3039
			25000000);
L
Linus Torvalds 已提交
3040

3041 3042 3043 3044
	if (baud == 0) {
		info->tbpr = info->tco = info->rbpr = info->rco = 0;
		return;
	}
L
Linus Torvalds 已提交
3045

3046 3047 3048 3049 3050
	/* determine which prescaler to use */
	for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
		if (cy_clock / co_val / baud > 63)
			break;
	}
L
Linus Torvalds 已提交
3051

3052 3053 3054
	bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
	if (bpr > 255)
		bpr = 255;
L
Linus Torvalds 已提交
3055

3056 3057
	info->tbpr = info->rbpr = bpr;
	info->tco = info->rco = co;
L
Linus Torvalds 已提交
3058 3059 3060 3061 3062 3063
}

/*
 * This routine finds or computes the various line characteristics.
 * It used to be called config_setup
 */
3064
static void set_line_char(struct cyclades_port *info)
L
Linus Torvalds 已提交
3065
{
3066 3067 3068 3069 3070 3071 3072 3073 3074 3075
	unsigned long flags;
	void __iomem *base_addr;
	int card, chip, channel, index;
	unsigned cflag, iflag;
	unsigned short chip_number;
	int baud, baud_rate = 0;
	int i;

	if (!info->tty || !info->tty->termios) {
		return;
L
Linus Torvalds 已提交
3076
	}
3077 3078
	if (info->line == -1) {
		return;
L
Linus Torvalds 已提交
3079
	}
3080 3081
	cflag = info->tty->termios->c_cflag;
	iflag = info->tty->termios->c_iflag;
L
Linus Torvalds 已提交
3082

3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094
	/*
	 * Set up the tty->alt_speed kludge
	 */
	if (info->tty) {
		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
			info->tty->alt_speed = 57600;
		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
			info->tty->alt_speed = 115200;
		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
			info->tty->alt_speed = 230400;
		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
			info->tty->alt_speed = 460800;
L
Linus Torvalds 已提交
3095
	}
3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207

	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
	chip_number = channel / 4;

	if (!IS_CYC_Z(cy_card[card])) {

		index = cy_card[card].bus_index;

		/* baud rate */
		baud = tty_get_baud_rate(info->tty);
		if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
				ASYNC_SPD_CUST) {
			if (info->custom_divisor)
				baud_rate = info->baud / info->custom_divisor;
			else
				baud_rate = info->baud;
		} else if (baud > CD1400_MAX_SPEED) {
			baud = CD1400_MAX_SPEED;
		}
		/* find the baud index */
		for (i = 0; i < 20; i++) {
			if (baud == baud_table[i]) {
				break;
			}
		}
		if (i == 20) {
			i = 19;	/* CD1400_MAX_SPEED */
		}

		if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
				ASYNC_SPD_CUST) {
			cyy_baud_calc(info, baud_rate);
		} else {
			if (info->chip_rev >= CD1400_REV_J) {
				/* It is a CD1400 rev. J or later */
				info->tbpr = baud_bpr_60[i];	/* Tx BPR */
				info->tco = baud_co_60[i];	/* Tx CO */
				info->rbpr = baud_bpr_60[i];	/* Rx BPR */
				info->rco = baud_co_60[i];	/* Rx CO */
			} else {
				info->tbpr = baud_bpr_25[i];	/* Tx BPR */
				info->tco = baud_co_25[i];	/* Tx CO */
				info->rbpr = baud_bpr_25[i];	/* Rx BPR */
				info->rco = baud_co_25[i];	/* Rx CO */
			}
		}
		if (baud_table[i] == 134) {
			/* get it right for 134.5 baud */
			info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
					2;
		} else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
				ASYNC_SPD_CUST) {
			info->timeout = (info->xmit_fifo_size * HZ * 15 /
					baud_rate) + 2;
		} else if (baud_table[i]) {
			info->timeout = (info->xmit_fifo_size * HZ * 15 /
					baud_table[i]) + 2;
			/* this needs to be propagated into the card info */
		} else {
			info->timeout = 0;
		}
		/* By tradition (is it a standard?) a baud rate of zero
		   implies the line should be/has been closed.  A bit
		   later in this routine such a test is performed. */

		/* byte size and parity */
		info->cor5 = 0;
		info->cor4 = 0;
		/* receive threshold */
		info->cor3 = (info->default_threshold ?
				info->default_threshold : baud_cor3[i]);
		info->cor2 = CyETC;
		switch (cflag & CSIZE) {
		case CS5:
			info->cor1 = Cy_5_BITS;
			break;
		case CS6:
			info->cor1 = Cy_6_BITS;
			break;
		case CS7:
			info->cor1 = Cy_7_BITS;
			break;
		case CS8:
			info->cor1 = Cy_8_BITS;
			break;
		}
		if (cflag & CSTOPB) {
			info->cor1 |= Cy_2_STOP;
		}
		if (cflag & PARENB) {
			if (cflag & PARODD) {
				info->cor1 |= CyPARITY_O;
			} else {
				info->cor1 |= CyPARITY_E;
			}
		} else {
			info->cor1 |= CyPARITY_NONE;
		}

		/* CTS flow control flag */
		if (cflag & CRTSCTS) {
			info->flags |= ASYNC_CTS_FLOW;
			info->cor2 |= CyCtsAE;
		} else {
			info->flags &= ~ASYNC_CTS_FLOW;
			info->cor2 &= ~CyCtsAE;
		}
		if (cflag & CLOCAL)
			info->flags &= ~ASYNC_CHECK_CD;
		else
			info->flags |= ASYNC_CHECK_CD;
L
Linus Torvalds 已提交
3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218

	 /***********************************************
	    The hardware option, CyRtsAO, presents RTS when
	    the chip has characters to send.  Since most modems
	    use RTS as reverse (inbound) flow control, this
	    option is not used.  If inbound flow control is
	    necessary, DTR can be programmed to provide the
	    appropriate signals for use with a non-standard
	    cable.  Contact Marcio Saito for details.
	 ***********************************************/

3219 3220 3221 3222
		chip = channel >> 2;
		channel &= 0x03;
		base_addr = cy_card[card].base_addr +
			(cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
3223

3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255
		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);

		/* tx and rx baud rate */

		cy_writeb(base_addr + (CyTCOR << index), info->tco);
		cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
		cy_writeb(base_addr + (CyRCOR << index), info->rco);
		cy_writeb(base_addr + (CyRBPR << index), info->rbpr);

		/* set line characteristics  according configuration */

		cy_writeb(base_addr + (CySCHR1 << index),
			  START_CHAR(info->tty));
		cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
		cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
		cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
		cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
		cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
		cy_writeb(base_addr + (CyCOR5 << index), info->cor5);

		cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
				CyCOR3ch, index);

		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);	/* !!! Is this needed? */
		cy_writeb(base_addr + (CyRTPR << index),
			(info->default_timeout ? info->default_timeout : 0x02));
		/* 10ms rx timeout */

		if (C_CLOCAL(info->tty)) {
			/* without modem intr */
			cy_writeb(base_addr + (CySRER << index),
3256
				readb(base_addr + (CySRER << index)) | CyMdmCh);
3257 3258 3259 3260 3261 3262 3263 3264 3265 3266
			/* act on 1->0 modem transitions */
			if ((cflag & CRTSCTS) && info->rflow) {
				cy_writeb(base_addr + (CyMCOR1 << index),
					  (CyCTS | rflow_thr[i]));
			} else {
				cy_writeb(base_addr + (CyMCOR1 << index),
					  CyCTS);
			}
			/* act on 0->1 modem transitions */
			cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
L
Linus Torvalds 已提交
3267
		} else {
3268 3269
			/* without modem intr */
			cy_writeb(base_addr + (CySRER << index),
3270
				  readb(base_addr +
3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283
					   (CySRER << index)) | CyMdmCh);
			/* act on 1->0 modem transitions */
			if ((cflag & CRTSCTS) && info->rflow) {
				cy_writeb(base_addr + (CyMCOR1 << index),
					  (CyDSR | CyCTS | CyRI | CyDCD |
					   rflow_thr[i]));
			} else {
				cy_writeb(base_addr + (CyMCOR1 << index),
					  CyDSR | CyCTS | CyRI | CyDCD);
			}
			/* act on 0->1 modem transitions */
			cy_writeb(base_addr + (CyMCOR2 << index),
				  CyDSR | CyCTS | CyRI | CyDCD);
L
Linus Torvalds 已提交
3284
		}
3285 3286 3287 3288 3289 3290 3291 3292 3293

		if (i == 0) {	/* baud rate is zero, turn off line */
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  ~CyRTS);
			} else {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  ~CyDTR);
			}
L
Linus Torvalds 已提交
3294
#ifdef CY_DEBUG_DTR
3295 3296
			printk("cyc:set_line_char dropping DTR\n");
			printk("     status: 0x%x, 0x%x\n",
3297 3298
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3299
#endif
3300 3301 3302 3303 3304 3305 3306 3307
		} else {
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  CyRTS);
			} else {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  CyDTR);
			}
L
Linus Torvalds 已提交
3308
#ifdef CY_DEBUG_DTR
3309 3310
			printk("cyc:set_line_char raising DTR\n");
			printk("     status: 0x%x, 0x%x\n",
3311 3312
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3313
#endif
3314
		}
L
Linus Torvalds 已提交
3315

3316 3317 3318 3319
		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
3320 3321

	} else {
3322 3323 3324 3325 3326
		struct FIRM_ID __iomem *firm_id;
		struct ZFW_CTRL __iomem *zfw_ctrl;
		struct BOARD_CTRL __iomem *board_ctrl;
		struct CH_CTRL __iomem *ch_ctrl;
		struct BUF_CTRL __iomem *buf_ctrl;
K
Klaus Kudielka 已提交
3327
		__u32 sw_flow;
3328
		int retval;
L
Linus Torvalds 已提交
3329

3330 3331 3332 3333
		firm_id = cy_card[card].base_addr + ID_ADDRESS;
		if (!ISZLOADED(cy_card[card])) {
			return;
		}
L
Linus Torvalds 已提交
3334

3335
		zfw_ctrl = cy_card[card].base_addr +
3336
			(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368
		board_ctrl = &zfw_ctrl->board_ctrl;
		ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
		buf_ctrl = &zfw_ctrl->buf_ctrl[channel];

		/* baud rate */
		baud = tty_get_baud_rate(info->tty);
		if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
				ASYNC_SPD_CUST) {
			if (info->custom_divisor)
				baud_rate = info->baud / info->custom_divisor;
			else
				baud_rate = info->baud;
		} else if (baud > CYZ_MAX_SPEED) {
			baud = CYZ_MAX_SPEED;
		}
		cy_writel(&ch_ctrl->comm_baud, baud);

		if (baud == 134) {
			/* get it right for 134.5 baud */
			info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
					2;
		} else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
				ASYNC_SPD_CUST) {
			info->timeout = (info->xmit_fifo_size * HZ * 15 /
					baud_rate) + 2;
		} else if (baud) {
			info->timeout = (info->xmit_fifo_size * HZ * 15 /
					baud) + 2;
			/* this needs to be propagated into the card info */
		} else {
			info->timeout = 0;
		}
L
Linus Torvalds 已提交
3369

3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386
		/* byte size and parity */
		switch (cflag & CSIZE) {
		case CS5:
			cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
			break;
		case CS6:
			cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
			break;
		case CS7:
			cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
			break;
		case CS8:
			cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
			break;
		}
		if (cflag & CSTOPB) {
			cy_writel(&ch_ctrl->comm_data_l,
3387
				  readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3388 3389
		} else {
			cy_writel(&ch_ctrl->comm_data_l,
3390
				  readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3391 3392 3393 3394 3395 3396 3397 3398 3399 3400
		}
		if (cflag & PARENB) {
			if (cflag & PARODD) {
				cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
			} else {
				cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
			}
		} else {
			cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
		}
L
Linus Torvalds 已提交
3401

3402 3403 3404
		/* CTS flow control flag */
		if (cflag & CRTSCTS) {
			cy_writel(&ch_ctrl->hw_flow,
3405
				readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3406
		} else {
3407 3408
			cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
					~(C_RS_CTS | C_RS_RTS));
3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434
		}
		/* As the HW flow control is done in firmware, the driver
		   doesn't need to care about it */
		info->flags &= ~ASYNC_CTS_FLOW;

		/* XON/XOFF/XANY flow control flags */
		sw_flow = 0;
		if (iflag & IXON) {
			sw_flow |= C_FL_OXX;
			if (iflag & IXANY)
				sw_flow |= C_FL_OIXANY;
		}
		cy_writel(&ch_ctrl->sw_flow, sw_flow);

		retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
		if (retval != 0) {
			printk("cyc:set_line_char retval on ttyC%d was %x\n",
				info->line, retval);
		}

		/* CD sensitivity */
		if (cflag & CLOCAL) {
			info->flags &= ~ASYNC_CHECK_CD;
		} else {
			info->flags |= ASYNC_CHECK_CD;
		}
L
Linus Torvalds 已提交
3435

3436 3437
		if (baud == 0) {	/* baud rate is zero, turn off line */
			cy_writel(&ch_ctrl->rs_control,
3438
				  readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
L
Linus Torvalds 已提交
3439
#ifdef CY_DEBUG_DTR
3440
			printk("cyc:set_line_char dropping Z DTR\n");
L
Linus Torvalds 已提交
3441
#endif
3442 3443
		} else {
			cy_writel(&ch_ctrl->rs_control,
3444
				  readl(&ch_ctrl->rs_control) | C_RS_DTR);
L
Linus Torvalds 已提交
3445
#ifdef CY_DEBUG_DTR
3446
			printk("cyc:set_line_char raising Z DTR\n");
L
Linus Torvalds 已提交
3447
#endif
3448
		}
L
Linus Torvalds 已提交
3449

3450 3451 3452 3453 3454
		retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
		if (retval != 0) {
			printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
				info->line, retval);
		}
L
Linus Torvalds 已提交
3455

3456 3457 3458
		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
L
Linus Torvalds 已提交
3459
	}
3460
}				/* set_line_char */
L
Linus Torvalds 已提交
3461 3462

static int
3463 3464
get_serial_info(struct cyclades_port *info,
		struct serial_struct __user * retinfo)
L
Linus Torvalds 已提交
3465
{
3466 3467
	struct serial_struct tmp;
	struct cyclades_card *cinfo = &cy_card[info->card];
L
Linus Torvalds 已提交
3468

3469 3470 3471 3472 3473 3474 3475 3476 3477
	if (!retinfo)
		return -EFAULT;
	memset(&tmp, 0, sizeof(tmp));
	tmp.type = info->type;
	tmp.line = info->line;
	tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
	tmp.irq = cinfo->irq;
	tmp.flags = info->flags;
	tmp.close_delay = info->close_delay;
3478
	tmp.closing_wait = info->closing_wait;
3479 3480 3481 3482 3483
	tmp.baud_base = info->baud;
	tmp.custom_divisor = info->custom_divisor;
	tmp.hub6 = 0;		/*!!! */
	return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
}				/* get_serial_info */
L
Linus Torvalds 已提交
3484 3485

static int
3486 3487
set_serial_info(struct cyclades_port *info,
		struct serial_struct __user * new_info)
L
Linus Torvalds 已提交
3488
{
3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520
	struct serial_struct new_serial;
	struct cyclades_port old_info;

	if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
		return -EFAULT;
	old_info = *info;

	if (!capable(CAP_SYS_ADMIN)) {
		if (new_serial.close_delay != info->close_delay ||
				new_serial.baud_base != info->baud ||
				(new_serial.flags & ASYNC_FLAGS &
					~ASYNC_USR_MASK) !=
				(info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
			return -EPERM;
		info->flags = (info->flags & ~ASYNC_USR_MASK) |
				(new_serial.flags & ASYNC_USR_MASK);
		info->baud = new_serial.baud_base;
		info->custom_divisor = new_serial.custom_divisor;
		goto check_and_exit;
	}

	/*
	 * OK, past this point, all the error checking has been done.
	 * At this point, we start making changes.....
	 */

	info->baud = new_serial.baud_base;
	info->custom_divisor = new_serial.custom_divisor;
	info->flags = (info->flags & ~ASYNC_FLAGS) |
			(new_serial.flags & ASYNC_FLAGS);
	info->close_delay = new_serial.close_delay * HZ / 100;
	info->closing_wait = new_serial.closing_wait * HZ / 100;
L
Linus Torvalds 已提交
3521 3522

check_and_exit:
3523 3524 3525 3526 3527 3528 3529
	if (info->flags & ASYNC_INITIALIZED) {
		set_line_char(info);
		return 0;
	} else {
		return startup(info);
	}
}				/* set_serial_info */
L
Linus Torvalds 已提交
3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540

/*
 * get_lsr_info - get line status register info
 *
 * Purpose: Let user call ioctl() to get info when the UART physically
 *	    is emptied.  On bus types like RS485, the transmitter must
 *	    release the bus after transmitting. This must be done when
 *	    the transmit shift register is empty, not be done when the
 *	    transmit holding register is empty.  This functionality
 *	    allows an RS485 driver to be written in user space.
 */
3541
static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
L
Linus Torvalds 已提交
3542
{
3543 3544 3545 3546 3547
	int card, chip, channel, index;
	unsigned char status;
	unsigned int result;
	unsigned long flags;
	void __iomem *base_addr;
L
Linus Torvalds 已提交
3548

3549 3550 3551 3552 3553 3554 3555 3556 3557 3558
	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);

		CY_LOCK(info, flags);
3559
		status = readb(base_addr + (CySRER << index)) &
3560 3561 3562 3563 3564 3565 3566 3567
				(CyTxRdy | CyTxMpty);
		CY_UNLOCK(info, flags);
		result = (status ? 0 : TIOCSER_TEMT);
	} else {
		/* Not supported yet */
		return -EINVAL;
	}
	return put_user(result, (unsigned long __user *)value);
L
Linus Torvalds 已提交
3568 3569
}

3570
static int cy_tiocmget(struct tty_struct *tty, struct file *file)
L
Linus Torvalds 已提交
3571
{
3572
	struct cyclades_port *info = tty->driver_data;
3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585
	int card, chip, channel, index;
	void __iomem *base_addr;
	unsigned long flags;
	unsigned char status;
	unsigned long lstatus;
	unsigned int result;
	struct FIRM_ID __iomem *firm_id;
	struct ZFW_CTRL __iomem *zfw_ctrl;
	struct BOARD_CTRL __iomem *board_ctrl;
	struct CH_CTRL __iomem *ch_ctrl;

	if (serial_paranoia_check(info, tty->name, __FUNCTION__))
		return -ENODEV;
L
Linus Torvalds 已提交
3586

3587 3588 3589 3590 3591 3592 3593 3594
	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
3595

3596 3597
		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3598 3599
		status = readb(base_addr + (CyMSVR1 << index));
		status |= readb(base_addr + (CyMSVR2 << index));
3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612
		CY_UNLOCK(info, flags);

		if (info->rtsdtr_inv) {
			result = ((status & CyRTS) ? TIOCM_DTR : 0) |
				((status & CyDTR) ? TIOCM_RTS : 0);
		} else {
			result = ((status & CyRTS) ? TIOCM_RTS : 0) |
				((status & CyDTR) ? TIOCM_DTR : 0);
		}
		result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
			((status & CyRI) ? TIOCM_RNG : 0) |
			((status & CyDSR) ? TIOCM_DSR : 0) |
			((status & CyCTS) ? TIOCM_CTS : 0);
L
Linus Torvalds 已提交
3613
	} else {
3614
		base_addr = cy_card[card].base_addr;
L
Linus Torvalds 已提交
3615

3616 3617 3618
		if (cy_card[card].num_chips != -1) {
			return -EINVAL;
		}
L
Linus Torvalds 已提交
3619

3620 3621 3622
		firm_id = cy_card[card].base_addr + ID_ADDRESS;
		if (ISZLOADED(cy_card[card])) {
			zfw_ctrl = cy_card[card].base_addr +
3623
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3624 3625
			board_ctrl = &zfw_ctrl->board_ctrl;
			ch_ctrl = zfw_ctrl->ch_ctrl;
3626
			lstatus = readl(&ch_ctrl[channel].rs_status);
3627 3628 3629 3630 3631 3632 3633 3634 3635 3636
			result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
				((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
				((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
				((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
				((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
				((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
		} else {
			result = 0;
			return -ENODEV;
		}
L
Linus Torvalds 已提交
3637

3638 3639 3640
	}
	return result;
}				/* cy_tiomget */
L
Linus Torvalds 已提交
3641 3642 3643

static int
cy_tiocmset(struct tty_struct *tty, struct file *file,
3644
		unsigned int set, unsigned int clear)
L
Linus Torvalds 已提交
3645
{
3646
	struct cyclades_port *info = tty->driver_data;
3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704
	int card, chip, channel, index;
	void __iomem *base_addr;
	unsigned long flags;
	struct FIRM_ID __iomem *firm_id;
	struct ZFW_CTRL __iomem *zfw_ctrl;
	struct BOARD_CTRL __iomem *board_ctrl;
	struct CH_CTRL __iomem *ch_ctrl;
	int retval;

	if (serial_paranoia_check(info, tty->name, __FUNCTION__))
		return -ENODEV;

	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);

		if (set & TIOCM_RTS) {
			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  CyDTR);
			} else {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  CyRTS);
			}
			CY_UNLOCK(info, flags);
		}
		if (clear & TIOCM_RTS) {
			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  ~CyDTR);
			} else {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  ~CyRTS);
			}
			CY_UNLOCK(info, flags);
		}
		if (set & TIOCM_DTR) {
			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  CyRTS);
			} else {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  CyDTR);
			}
L
Linus Torvalds 已提交
3705
#ifdef CY_DEBUG_DTR
3706 3707
			printk("cyc:set_modem_info raising DTR\n");
			printk("     status: 0x%x, 0x%x\n",
3708 3709
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3710
#endif
3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723
			CY_UNLOCK(info, flags);
		}
		if (clear & TIOCM_DTR) {
			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  ~CyRTS);
			} else {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  ~CyDTR);
			}
L
Linus Torvalds 已提交
3724 3725

#ifdef CY_DEBUG_DTR
3726 3727
			printk("cyc:set_modem_info dropping DTR\n");
			printk("     status: 0x%x, 0x%x\n",
3728 3729
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3730
#endif
3731 3732 3733 3734 3735 3736 3737 3738
			CY_UNLOCK(info, flags);
		}
	} else {
		base_addr = cy_card[card].base_addr;

		firm_id = cy_card[card].base_addr + ID_ADDRESS;
		if (ISZLOADED(cy_card[card])) {
			zfw_ctrl = cy_card[card].base_addr +
3739
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3740 3741 3742 3743 3744 3745
			board_ctrl = &zfw_ctrl->board_ctrl;
			ch_ctrl = zfw_ctrl->ch_ctrl;

			if (set & TIOCM_RTS) {
				CY_LOCK(info, flags);
				cy_writel(&ch_ctrl[channel].rs_control,
3746 3747
					readl(&ch_ctrl[channel].rs_control) |
					C_RS_RTS);
3748 3749 3750 3751 3752
				CY_UNLOCK(info, flags);
			}
			if (clear & TIOCM_RTS) {
				CY_LOCK(info, flags);
				cy_writel(&ch_ctrl[channel].rs_control,
3753 3754
					readl(&ch_ctrl[channel].rs_control) &
					~C_RS_RTS);
3755 3756 3757 3758 3759
				CY_UNLOCK(info, flags);
			}
			if (set & TIOCM_DTR) {
				CY_LOCK(info, flags);
				cy_writel(&ch_ctrl[channel].rs_control,
3760 3761
					readl(&ch_ctrl[channel].rs_control) |
					C_RS_DTR);
L
Linus Torvalds 已提交
3762
#ifdef CY_DEBUG_DTR
3763
				printk("cyc:set_modem_info raising Z DTR\n");
L
Linus Torvalds 已提交
3764
#endif
3765 3766 3767 3768 3769
				CY_UNLOCK(info, flags);
			}
			if (clear & TIOCM_DTR) {
				CY_LOCK(info, flags);
				cy_writel(&ch_ctrl[channel].rs_control,
3770 3771
					readl(&ch_ctrl[channel].rs_control) &
					~C_RS_DTR);
L
Linus Torvalds 已提交
3772
#ifdef CY_DEBUG_DTR
3773
				printk("cyc:set_modem_info clearing Z DTR\n");
L
Linus Torvalds 已提交
3774
#endif
3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787
				CY_UNLOCK(info, flags);
			}
		} else {
			return -ENODEV;
		}
		CY_LOCK(info, flags);
		retval = cyz_issue_cmd(&cy_card[info->card],
					channel, C_CM_IOCTLM, 0L);
		if (retval != 0) {
			printk("cyc:set_modem_info retval on ttyC%d was %x\n",
				info->line, retval);
		}
		CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
3788
	}
3789 3790
	return 0;
}				/* cy_tiocmset */
L
Linus Torvalds 已提交
3791 3792 3793 3794

/*
 * cy_break() --- routine which turns the break handling on or off
 */
3795
static void cy_break(struct tty_struct *tty, int break_state)
L
Linus Torvalds 已提交
3796
{
3797
	struct cyclades_port *info = tty->driver_data;
3798
	unsigned long flags;
L
Linus Torvalds 已提交
3799

3800 3801
	if (serial_paranoia_check(info, tty->name, "cy_break"))
		return;
L
Linus Torvalds 已提交
3802

3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825
	CY_LOCK(info, flags);
	if (!IS_CYC_Z(cy_card[info->card])) {
		/* Let the transmit ISR take care of this (since it
		   requires stuffing characters into the output stream).
		 */
		if (break_state == -1) {
			if (!info->breakon) {
				info->breakon = 1;
				if (!info->xmit_cnt) {
					CY_UNLOCK(info, flags);
					start_xmit(info);
					CY_LOCK(info, flags);
				}
			}
		} else {
			if (!info->breakoff) {
				info->breakoff = 1;
				if (!info->xmit_cnt) {
					CY_UNLOCK(info, flags);
					start_xmit(info);
					CY_LOCK(info, flags);
				}
			}
L
Linus Torvalds 已提交
3826 3827
		}
	} else {
3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845
		int retval;

		if (break_state == -1) {
			retval = cyz_issue_cmd(&cy_card[info->card],
				info->line - cy_card[info->card].first_line,
				C_CM_SET_BREAK, 0L);
			if (retval != 0) {
				printk("cyc:cy_break (set) retval on ttyC%d "
					"was %x\n", info->line, retval);
			}
		} else {
			retval = cyz_issue_cmd(&cy_card[info->card],
				info->line - cy_card[info->card].first_line,
				C_CM_CLR_BREAK, 0L);
			if (retval != 0) {
				printk("cyc:cy_break (clr) retval on ttyC%d "
					"was %x\n", info->line, retval);
			}
L
Linus Torvalds 已提交
3846 3847
		}
	}
3848 3849
	CY_UNLOCK(info, flags);
}				/* cy_break */
L
Linus Torvalds 已提交
3850 3851

static int
3852
get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
L
Linus Torvalds 已提交
3853 3854
{

3855 3856 3857 3858 3859 3860 3861 3862
	if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
		return -EFAULT;
	info->mon.int_count = 0;
	info->mon.char_count = 0;
	info->mon.char_max = 0;
	info->mon.char_last = 0;
	return 0;
}				/* get_mon_info */
L
Linus Torvalds 已提交
3863

3864
static int set_threshold(struct cyclades_port *info, unsigned long value)
L
Linus Torvalds 已提交
3865
{
3866 3867 3868
	void __iomem *base_addr;
	int card, channel, chip, index;
	unsigned long flags;
L
Linus Torvalds 已提交
3869

3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880
	card = info->card;
	channel = info->line - cy_card[card].first_line;
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);

		info->cor3 &= ~CyREC_FIFO;
		info->cor3 |= value & CyREC_FIFO;
L
Linus Torvalds 已提交
3881

3882 3883 3884 3885 3886
		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
		cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
		CY_UNLOCK(info, flags);
	} else {
J
Jiri Slaby 已提交
3887
		/* Nothing to do! */
3888 3889 3890
	}
	return 0;
}				/* set_threshold */
L
Linus Torvalds 已提交
3891 3892

static int
3893
get_threshold(struct cyclades_port *info, unsigned long __user * value)
L
Linus Torvalds 已提交
3894
{
3895 3896 3897
	void __iomem *base_addr;
	int card, channel, chip, index;
	unsigned long tmp;
L
Linus Torvalds 已提交
3898

3899 3900 3901 3902 3903 3904 3905 3906 3907
	card = info->card;
	channel = info->line - cy_card[card].first_line;
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);

3908
		tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3909 3910
		return put_user(tmp, value);
	} else {
J
Jiri Slaby 已提交
3911
		/* Nothing to do! */
3912 3913 3914
		return 0;
	}
}				/* get_threshold */
L
Linus Torvalds 已提交
3915 3916

static int
3917
set_default_threshold(struct cyclades_port *info, unsigned long value)
L
Linus Torvalds 已提交
3918
{
3919 3920 3921
	info->default_threshold = value & 0x0f;
	return 0;
}				/* set_default_threshold */
L
Linus Torvalds 已提交
3922 3923

static int
3924
get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
L
Linus Torvalds 已提交
3925
{
3926 3927
	return put_user(info->default_threshold, value);
}				/* get_default_threshold */
L
Linus Torvalds 已提交
3928

3929
static int set_timeout(struct cyclades_port *info, unsigned long value)
L
Linus Torvalds 已提交
3930
{
3931 3932 3933
	void __iomem *base_addr;
	int card, channel, chip, index;
	unsigned long flags;
L
Linus Torvalds 已提交
3934

3935 3936 3937 3938 3939 3940 3941 3942
	card = info->card;
	channel = info->line - cy_card[card].first_line;
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
3943

3944 3945 3946 3947
		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
		CY_UNLOCK(info, flags);
	} else {
J
Jiri Slaby 已提交
3948
		/* Nothing to do! */
3949 3950 3951
	}
	return 0;
}				/* set_timeout */
L
Linus Torvalds 已提交
3952

3953
static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
L
Linus Torvalds 已提交
3954
{
3955 3956 3957
	void __iomem *base_addr;
	int card, channel, chip, index;
	unsigned long tmp;
L
Linus Torvalds 已提交
3958

3959 3960 3961 3962 3963 3964 3965 3966 3967
	card = info->card;
	channel = info->line - cy_card[card].first_line;
	if (!IS_CYC_Z(cy_card[card])) {
		chip = channel >> 2;
		channel &= 0x03;
		index = cy_card[card].bus_index;
		base_addr =
		    cy_card[card].base_addr + (cy_chip_offset[chip] << index);

3968
		tmp = readb(base_addr + (CyRTPR << index));
3969 3970
		return put_user(tmp, value);
	} else {
J
Jiri Slaby 已提交
3971
		/* Nothing to do! */
3972 3973 3974
		return 0;
	}
}				/* get_timeout */
L
Linus Torvalds 已提交
3975

3976
static int set_default_timeout(struct cyclades_port *info, unsigned long value)
L
Linus Torvalds 已提交
3977
{
3978 3979 3980
	info->default_timeout = value & 0xff;
	return 0;
}				/* set_default_timeout */
L
Linus Torvalds 已提交
3981 3982

static int
3983
get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
L
Linus Torvalds 已提交
3984
{
3985 3986
	return put_user(info->default_timeout, value);
}				/* get_default_timeout */
L
Linus Torvalds 已提交
3987 3988 3989 3990 3991 3992 3993

/*
 * This routine allows the tty driver to implement device-
 * specific ioctl's.  If the ioctl number passed in cmd is
 * not recognized by the driver, it should return ENOIOCTLCMD.
 */
static int
3994 3995
cy_ioctl(struct tty_struct *tty, struct file *file,
	 unsigned int cmd, unsigned long arg)
L
Linus Torvalds 已提交
3996
{
3997
	struct cyclades_port *info = tty->driver_data;
3998 3999 4000 4001 4002 4003 4004 4005
	struct cyclades_icount cprev, cnow;	/* kernel counter temps */
	struct serial_icounter_struct __user *p_cuser;	/* user space */
	int ret_val = 0;
	unsigned long flags;
	void __user *argp = (void __user *)arg;

	if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
		return -ENODEV;
L
Linus Torvalds 已提交
4006 4007

#ifdef CY_DEBUG_OTHER
4008
	printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg);	/* */
L
Linus Torvalds 已提交
4009 4010
#endif

4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038
	switch (cmd) {
	case CYGETMON:
		ret_val = get_mon_info(info, argp);
		break;
	case CYGETTHRESH:
		ret_val = get_threshold(info, argp);
		break;
	case CYSETTHRESH:
		ret_val = set_threshold(info, arg);
		break;
	case CYGETDEFTHRESH:
		ret_val = get_default_threshold(info, argp);
		break;
	case CYSETDEFTHRESH:
		ret_val = set_default_threshold(info, arg);
		break;
	case CYGETTIMEOUT:
		ret_val = get_timeout(info, argp);
		break;
	case CYSETTIMEOUT:
		ret_val = set_timeout(info, arg);
		break;
	case CYGETDEFTIMEOUT:
		ret_val = get_default_timeout(info, argp);
		break;
	case CYSETDEFTIMEOUT:
		ret_val = set_default_timeout(info, arg);
		break;
L
Linus Torvalds 已提交
4039
	case CYSETRFLOW:
4040 4041 4042
		info->rflow = (int)arg;
		ret_val = 0;
		break;
L
Linus Torvalds 已提交
4043
	case CYGETRFLOW:
4044 4045
		ret_val = info->rflow;
		break;
L
Linus Torvalds 已提交
4046
	case CYSETRTSDTR_INV:
4047 4048 4049
		info->rtsdtr_inv = (int)arg;
		ret_val = 0;
		break;
L
Linus Torvalds 已提交
4050
	case CYGETRTSDTR_INV:
4051 4052
		ret_val = info->rtsdtr_inv;
		break;
L
Linus Torvalds 已提交
4053
	case CYGETCARDINFO:
4054 4055 4056 4057 4058 4059
		if (copy_to_user(argp, &cy_card[info->card],
				 sizeof(struct cyclades_card))) {
			ret_val = -EFAULT;
			break;
		}
		ret_val = 0;
L
Linus Torvalds 已提交
4060 4061
		break;
	case CYGETCD1400VER:
4062 4063
		ret_val = info->chip_rev;
		break;
L
Linus Torvalds 已提交
4064 4065
#ifndef CONFIG_CYZ_INTR
	case CYZSETPOLLCYCLE:
4066 4067 4068
		cyz_polling_cycle = (arg * HZ) / 1000;
		ret_val = 0;
		break;
L
Linus Torvalds 已提交
4069
	case CYZGETPOLLCYCLE:
4070 4071 4072
		ret_val = (cyz_polling_cycle * 1000) / HZ;
		break;
#endif				/* CONFIG_CYZ_INTR */
L
Linus Torvalds 已提交
4073
	case CYSETWAIT:
4074 4075 4076
		info->closing_wait = (unsigned short)arg *HZ / 100;
		ret_val = 0;
		break;
L
Linus Torvalds 已提交
4077
	case CYGETWAIT:
4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094
		ret_val = info->closing_wait / (HZ / 100);
		break;
	case TIOCGSERIAL:
		ret_val = get_serial_info(info, argp);
		break;
	case TIOCSSERIAL:
		ret_val = set_serial_info(info, argp);
		break;
	case TIOCSERGETLSR:	/* Get line status register */
		ret_val = get_lsr_info(info, argp);
		break;
		/*
		 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
		 * - mask passed in arg for lines of interest
		 *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
		 * Caller should use TIOCGICOUNT to see which one it was
		 */
L
Linus Torvalds 已提交
4095 4096
	case TIOCMIWAIT:
		CY_LOCK(info, flags);
4097 4098
		/* note the counters on entry */
		cprev = info->icount;
L
Linus Torvalds 已提交
4099
		CY_UNLOCK(info, flags);
4100 4101 4102 4103 4104 4105
		while (1) {
			interruptible_sleep_on(&info->delta_msr_wait);
			/* see if a signal did it */
			if (signal_pending(current)) {
				return -ERESTARTSYS;
			}
L
Linus Torvalds 已提交
4106

4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121
			CY_LOCK(info, flags);
			cnow = info->icount;	/* atomic copy */
			CY_UNLOCK(info, flags);

			if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
			    cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
				return -EIO;	/* no change => error */
			}
			if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
			    ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
			    ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
			    ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
				return 0;
			}
			cprev = cnow;
L
Linus Torvalds 已提交
4122
		}
4123
		/* NOTREACHED */
L
Linus Torvalds 已提交
4124

4125 4126 4127 4128 4129 4130
		/*
		 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
		 * Return: write counters to the user passed counter struct
		 * NB: both 1->0 and 0->1 transitions are counted except for
		 *     RI where only 0->1 is counted.
		 */
L
Linus Torvalds 已提交
4131
	case TIOCGICOUNT:
4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173
		CY_LOCK(info, flags);
		cnow = info->icount;
		CY_UNLOCK(info, flags);
		p_cuser = argp;
		ret_val = put_user(cnow.cts, &p_cuser->cts);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.dsr, &p_cuser->dsr);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.rng, &p_cuser->rng);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.dcd, &p_cuser->dcd);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.rx, &p_cuser->rx);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.tx, &p_cuser->tx);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.frame, &p_cuser->frame);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.overrun, &p_cuser->overrun);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.parity, &p_cuser->parity);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.brk, &p_cuser->brk);
		if (ret_val)
			return ret_val;
		ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
		if (ret_val)
			return ret_val;
		ret_val = 0;
		break;
	default:
		ret_val = -ENOIOCTLCMD;
	}
L
Linus Torvalds 已提交
4174 4175

#ifdef CY_DEBUG_OTHER
4176
	printk(" cyc:cy_ioctl done\n");
L
Linus Torvalds 已提交
4177 4178
#endif

4179 4180
	return ret_val;
}				/* cy_ioctl */
L
Linus Torvalds 已提交
4181 4182 4183 4184 4185 4186 4187

/*
 * This routine allows the tty driver to be notified when
 * device's termios settings have changed.  Note that a
 * well-designed tty driver should be prepared to accept the case
 * where old == NULL, and try to do something rational.
 */
4188
static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
L
Linus Torvalds 已提交
4189
{
4190
	struct cyclades_port *info = tty->driver_data;
L
Linus Torvalds 已提交
4191 4192

#ifdef CY_DEBUG_OTHER
4193
	printk("cyc:cy_set_termios ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4194 4195
#endif

4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206
	if (tty->termios->c_cflag == old_termios->c_cflag &&
			(tty->termios->c_iflag & (IXON | IXANY)) ==
			(old_termios->c_iflag & (IXON | IXANY)))
		return;
	set_line_char(info);

	if ((old_termios->c_cflag & CRTSCTS) &&
			!(tty->termios->c_cflag & CRTSCTS)) {
		tty->hw_stopped = 0;
		cy_start(tty);
	}
L
Linus Torvalds 已提交
4207
#if 0
4208 4209 4210 4211 4212 4213 4214 4215 4216
	/*
	 * No need to wake up processes in open wait, since they
	 * sample the CLOCAL flag once, and don't recheck it.
	 * XXX  It's not clear whether the current behavior is correct
	 * or not.  Hence, this may change.....
	 */
	if (!(old_termios->c_cflag & CLOCAL) &&
	    (tty->termios->c_cflag & CLOCAL))
		wake_up_interruptible(&info->open_wait);
L
Linus Torvalds 已提交
4217
#endif
4218
}				/* cy_set_termios */
L
Linus Torvalds 已提交
4219 4220 4221 4222

/* This function is used to send a high-priority XON/XOFF character to
   the device.
*/
4223
static void cy_send_xchar(struct tty_struct *tty, char ch)
L
Linus Torvalds 已提交
4224
{
4225
	struct cyclades_port *info = tty->driver_data;
L
Linus Torvalds 已提交
4226 4227
	int card, channel;

4228
	if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
L
Linus Torvalds 已提交
4229 4230
		return;

4231
	info->x_char = ch;
L
Linus Torvalds 已提交
4232 4233

	if (ch)
4234
		cy_start(tty);
L
Linus Torvalds 已提交
4235 4236 4237 4238

	card = info->card;
	channel = info->line - cy_card[card].first_line;

4239 4240 4241 4242 4243 4244 4245
	if (IS_CYC_Z(cy_card[card])) {
		if (ch == STOP_CHAR(tty))
			cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
					0L);
		else if (ch == START_CHAR(tty))
			cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
					0L);
L
Linus Torvalds 已提交
4246 4247 4248 4249 4250 4251 4252
	}
}

/* This routine is called by the upper-layer tty layer to signal
   that incoming characters should be throttled because the input
   buffers are close to full.
 */
4253
static void cy_throttle(struct tty_struct *tty)
L
Linus Torvalds 已提交
4254
{
4255
	struct cyclades_port *info = tty->driver_data;
4256 4257 4258
	unsigned long flags;
	void __iomem *base_addr;
	int card, chip, channel, index;
L
Linus Torvalds 已提交
4259 4260

#ifdef CY_DEBUG_THROTTLE
4261
	char buf[64];
L
Linus Torvalds 已提交
4262

4263 4264
	printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
			tty->ldisc.chars_in_buffer(tty), info->line);
L
Linus Torvalds 已提交
4265 4266
#endif

4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278
	if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
		return;
	}

	card = info->card;

	if (I_IXOFF(tty)) {
		if (!IS_CYC_Z(cy_card[card]))
			cy_send_xchar(tty, STOP_CHAR(tty));
		else
			info->throttle = 1;
	}
L
Linus Torvalds 已提交
4279

4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304
	if (tty->termios->c_cflag & CRTSCTS) {
		channel = info->line - cy_card[card].first_line;
		if (!IS_CYC_Z(cy_card[card])) {
			chip = channel >> 2;
			channel &= 0x03;
			index = cy_card[card].bus_index;
			base_addr = cy_card[card].base_addr +
				(cy_chip_offset[chip] << index);

			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  ~CyDTR);
			} else {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  ~CyRTS);
			}
			CY_UNLOCK(info, flags);
		} else {
			info->throttle = 1;
		}
	}
}				/* cy_throttle */
L
Linus Torvalds 已提交
4305 4306 4307 4308 4309 4310

/*
 * This routine notifies the tty driver that it should signal
 * that characters can now be sent to the tty without fear of
 * overrunning the input buffers of the line disciplines.
 */
4311
static void cy_unthrottle(struct tty_struct *tty)
L
Linus Torvalds 已提交
4312
{
4313
	struct cyclades_port *info = tty->driver_data;
4314 4315 4316
	unsigned long flags;
	void __iomem *base_addr;
	int card, chip, channel, index;
L
Linus Torvalds 已提交
4317 4318

#ifdef CY_DEBUG_THROTTLE
4319 4320 4321 4322
	char buf[64];

	printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
		tty->ldisc.chars_in_buffer(tty), info->line);
L
Linus Torvalds 已提交
4323 4324
#endif

4325 4326 4327
	if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
		return;
	}
L
Linus Torvalds 已提交
4328

4329 4330 4331 4332 4333
	if (I_IXOFF(tty)) {
		if (info->x_char)
			info->x_char = 0;
		else
			cy_send_xchar(tty, START_CHAR(tty));
L
Linus Torvalds 已提交
4334 4335
	}

4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361
	if (tty->termios->c_cflag & CRTSCTS) {
		card = info->card;
		channel = info->line - cy_card[card].first_line;
		if (!IS_CYC_Z(cy_card[card])) {
			chip = channel >> 2;
			channel &= 0x03;
			index = cy_card[card].bus_index;
			base_addr = cy_card[card].base_addr +
				(cy_chip_offset[chip] << index);

			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (info->rtsdtr_inv) {
				cy_writeb(base_addr + (CyMSVR2 << index),
					  CyDTR);
			} else {
				cy_writeb(base_addr + (CyMSVR1 << index),
					  CyRTS);
			}
			CY_UNLOCK(info, flags);
		} else {
			info->throttle = 0;
		}
	}
}				/* cy_unthrottle */
L
Linus Torvalds 已提交
4362 4363 4364 4365

/* cy_start and cy_stop provide software output flow control as a
   function of XON/XOFF, software CTS, and other such stuff.
*/
4366
static void cy_stop(struct tty_struct *tty)
L
Linus Torvalds 已提交
4367
{
4368
	struct cyclades_card *cinfo;
4369
	struct cyclades_port *info = tty->driver_data;
4370 4371 4372
	void __iomem *base_addr;
	int chip, channel, index;
	unsigned long flags;
L
Linus Torvalds 已提交
4373 4374

#ifdef CY_DEBUG_OTHER
4375
	printk("cyc:cy_stop ttyC%d\n", info->line);	/* */
L
Linus Torvalds 已提交
4376 4377
#endif

4378 4379
	if (serial_paranoia_check(info, tty->name, "cy_stop"))
		return;
L
Linus Torvalds 已提交
4380

4381 4382 4383 4384 4385 4386 4387 4388
	cinfo = &cy_card[info->card];
	channel = info->line - cinfo->first_line;
	if (!IS_CYC_Z(*cinfo)) {
		index = cinfo->bus_index;
		chip = channel >> 2;
		channel &= 0x03;
		base_addr = cy_card[info->card].base_addr +
			(cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
4389

4390 4391 4392 4393
		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index),
			(u_char)(channel & 0x0003)); /* index channel */
		cy_writeb(base_addr + (CySRER << index),
4394
			  readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4395 4396
		CY_UNLOCK(info, flags);
	} else {
J
Jiri Slaby 已提交
4397
		/* Nothing to do! */
4398 4399
	}
}				/* cy_stop */
L
Linus Torvalds 已提交
4400

4401
static void cy_start(struct tty_struct *tty)
L
Linus Torvalds 已提交
4402
{
4403
	struct cyclades_card *cinfo;
4404
	struct cyclades_port *info = tty->driver_data;
4405 4406 4407
	void __iomem *base_addr;
	int chip, channel, index;
	unsigned long flags;
L
Linus Torvalds 已提交
4408 4409

#ifdef CY_DEBUG_OTHER
4410
	printk("cyc:cy_start ttyC%d\n", info->line);	/* */
L
Linus Torvalds 已提交
4411 4412
#endif

4413 4414
	if (serial_paranoia_check(info, tty->name, "cy_start"))
		return;
L
Linus Torvalds 已提交
4415

4416 4417 4418 4419 4420 4421 4422 4423
	cinfo = &cy_card[info->card];
	channel = info->line - cinfo->first_line;
	index = cinfo->bus_index;
	if (!IS_CYC_Z(*cinfo)) {
		chip = channel >> 2;
		channel &= 0x03;
		base_addr = cy_card[info->card].base_addr +
			(cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
4424

4425 4426 4427
		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003));	/* index channel */
		cy_writeb(base_addr + (CySRER << index),
4428
			  readb(base_addr + (CySRER << index)) | CyTxRdy);
4429 4430
		CY_UNLOCK(info, flags);
	} else {
J
Jiri Slaby 已提交
4431
		/* Nothing to do! */
4432 4433
	}
}				/* cy_start */
L
Linus Torvalds 已提交
4434

4435
static void cy_flush_buffer(struct tty_struct *tty)
L
Linus Torvalds 已提交
4436
{
4437
	struct cyclades_port *info = tty->driver_data;
4438 4439 4440
	int card, channel, retval;
	unsigned long flags;

L
Linus Torvalds 已提交
4441
#ifdef CY_DEBUG_IO
4442
	printk("cyc:cy_flush_buffer ttyC%d\n", info->line);	/* */
L
Linus Torvalds 已提交
4443 4444
#endif

4445 4446
	if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
		return;
L
Linus Torvalds 已提交
4447

4448 4449
	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
L
Linus Torvalds 已提交
4450 4451

	CY_LOCK(info, flags);
4452
	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
L
Linus Torvalds 已提交
4453 4454
	CY_UNLOCK(info, flags);

4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467
	if (IS_CYC_Z(cy_card[card])) {	/* If it is a Z card, flush the on-board
					   buffers as well */
		CY_LOCK(info, flags);
		retval =
		    cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
		if (retval != 0) {
			printk("cyc: flush_buffer retval on ttyC%d was %x\n",
				info->line, retval);
		}
		CY_UNLOCK(info, flags);
	}
	tty_wakeup(tty);
}				/* cy_flush_buffer */
L
Linus Torvalds 已提交
4468 4469 4470 4471

/*
 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
 */
4472
static void cy_hangup(struct tty_struct *tty)
L
Linus Torvalds 已提交
4473
{
4474
	struct cyclades_port *info = tty->driver_data;
4475

L
Linus Torvalds 已提交
4476
#ifdef CY_DEBUG_OTHER
4477
	printk("cyc:cy_hangup ttyC%d\n", info->line);	/* */
L
Linus Torvalds 已提交
4478 4479
#endif

4480 4481
	if (serial_paranoia_check(info, tty->name, "cy_hangup"))
		return;
L
Linus Torvalds 已提交
4482

4483 4484 4485 4486
	cy_flush_buffer(tty);
	shutdown(info);
	info->event = 0;
	info->count = 0;
L
Linus Torvalds 已提交
4487
#ifdef CY_DEBUG_COUNT
4488
	printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
L
Linus Torvalds 已提交
4489
#endif
4490 4491 4492 4493
	info->tty = NULL;
	info->flags &= ~ASYNC_NORMAL_ACTIVE;
	wake_up_interruptible(&info->open_wait);
}				/* cy_hangup */
L
Linus Torvalds 已提交
4494 4495 4496 4497 4498 4499 4500 4501 4502

/*
 * ---------------------------------------------------------------------
 * cy_init() and friends
 *
 * cy_init() is called at boot-time to initialize the serial driver.
 * ---------------------------------------------------------------------
 */

4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655
static void __devinit cy_init_card(struct cyclades_card *cinfo,
		const unsigned int board)
{
	struct cyclades_port *info;
	u32 mailbox;
	unsigned int nports;
	unsigned short chip_number;
	int index, port;

	if (cinfo->num_chips == -1) {	/* Cyclades-Z */
		mailbox = readl(&((struct RUNTIME_9060 __iomem *)
				     cinfo->ctl_addr)->mail_box_0);
		nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
		cinfo->intr_enabled = 0;
		cinfo->nports = 0;	/* Will be correctly set later, after
					   Z FW is loaded */
		spin_lock_init(&cinfo->card_lock);
		for (port = cinfo->first_line;
		     port < cinfo->first_line + nports; port++) {
			info = &cy_port[port];
			info->magic = CYCLADES_MAGIC;
			info->type = PORT_STARTECH;
			info->card = board;
			info->line = port;
			info->chip_rev = 0;
			info->flags = STD_COM_FLAGS;
			info->tty = NULL;
			if (mailbox == ZO_V1)
				info->xmit_fifo_size = CYZ_FIFO_SIZE;
			else
				info->xmit_fifo_size =
				    4 * CYZ_FIFO_SIZE;
			info->cor1 = 0;
			info->cor2 = 0;
			info->cor3 = 0;
			info->cor4 = 0;
			info->cor5 = 0;
			info->tbpr = 0;
			info->tco = 0;
			info->rbpr = 0;
			info->rco = 0;
			info->custom_divisor = 0;
			info->close_delay = 5 * HZ / 10;
			info->closing_wait = CLOSING_WAIT_DELAY;
			info->icount.cts = info->icount.dsr =
			    info->icount.rng = info->icount.dcd = 0;
			info->icount.rx = info->icount.tx = 0;
			info->icount.frame = info->icount.parity = 0;
			info->icount.overrun = info->icount.brk = 0;
			info->x_char = 0;
			info->event = 0;
			info->count = 0;
			info->blocked_open = 0;
			info->default_threshold = 0;
			info->default_timeout = 0;
			INIT_WORK(&info->tqueue, do_softint);
			init_waitqueue_head(&info->open_wait);
			init_waitqueue_head(&info->close_wait);
			init_waitqueue_head(&info->shutdown_wait);
			init_waitqueue_head(&info->delta_msr_wait);
			/* info->session */
			/* info->pgrp */
			info->read_status_mask = 0;
			/* info->timeout */
			/* Bentson's vars */
			info->jiffies[0] = 0;
			info->jiffies[1] = 0;
			info->jiffies[2] = 0;
			info->rflush_count = 0;
#ifdef CONFIG_CYZ_INTR
			init_timer(&cyz_rx_full_timer[port]);
			cyz_rx_full_timer[port].function = NULL;
#endif
		}
#ifndef CONFIG_CYZ_INTR
		if (!timer_pending(&cyz_timerlist)) {
			mod_timer(&cyz_timerlist, jiffies + 1);
#ifdef CY_PCI_DEBUG
			printk("Cyclades-Z polling initialized\n");
#endif
		}
#endif				/* CONFIG_CYZ_INTR */

	} else {	/* Cyclom-Y of some kind */
		index = cinfo->bus_index;
		spin_lock_init(&cinfo->card_lock);
		cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
		for (port = cinfo->first_line;
		     port < cinfo->first_line + cinfo->nports; port++) {
			info = &cy_port[port];
			info->magic = CYCLADES_MAGIC;
			info->type = PORT_CIRRUS;
			info->card = board;
			info->line = port;
			info->flags = STD_COM_FLAGS;
			info->tty = NULL;
			info->xmit_fifo_size = CyMAX_CHAR_FIFO;
			info->cor1 =
			    CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
			info->cor2 = CyETC;
			info->cor3 = 0x08;	/* _very_ small rcv threshold */
			info->cor4 = 0;
			info->cor5 = 0;
			info->custom_divisor = 0;
			info->close_delay = 5 * HZ / 10;
			info->closing_wait = CLOSING_WAIT_DELAY;
			info->icount.cts = info->icount.dsr =
			    info->icount.rng = info->icount.dcd = 0;
			info->icount.rx = info->icount.tx = 0;
			info->icount.frame = info->icount.parity = 0;
			info->icount.overrun = info->icount.brk = 0;
			chip_number = (port - cinfo->first_line) / 4;
			if ((info->chip_rev =
			     readb(cinfo->base_addr +
				      (cy_chip_offset[chip_number] <<
				       index) + (CyGFRCR << index))) >=
			    CD1400_REV_J) {
				/* It is a CD1400 rev. J or later */
				info->tbpr = baud_bpr_60[13];	/* Tx BPR */
				info->tco = baud_co_60[13];	/* Tx CO */
				info->rbpr = baud_bpr_60[13];	/* Rx BPR */
				info->rco = baud_co_60[13];	/* Rx CO */
				info->rflow = 0;
				info->rtsdtr_inv = 1;
			} else {
				info->tbpr = baud_bpr_25[13];	/* Tx BPR */
				info->tco = baud_co_25[13];	/* Tx CO */
				info->rbpr = baud_bpr_25[13];	/* Rx BPR */
				info->rco = baud_co_25[13];	/* Rx CO */
				info->rflow = 0;
				info->rtsdtr_inv = 0;
			}
			info->x_char = 0;
			info->event = 0;
			info->count = 0;
			info->blocked_open = 0;
			info->default_threshold = 0;
			info->default_timeout = 0;
			INIT_WORK(&info->tqueue, do_softint);
			init_waitqueue_head(&info->open_wait);
			init_waitqueue_head(&info->close_wait);
			init_waitqueue_head(&info->shutdown_wait);
			init_waitqueue_head(&info->delta_msr_wait);
			/* info->session */
			/* info->pgrp */
			info->read_status_mask =
			    CyTIMEOUT | CySPECHAR | CyBREAK
			    | CyPARITY | CyFRAME | CyOVERRUN;
			/* info->timeout */
		}
	}
}

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/* initialize chips on Cyclom-Y card -- return number of valid
   chips (which is number of ports/4) */
static unsigned short __init
4659
cyy_init_card(void __iomem * true_base_addr, int index)
L
Linus Torvalds 已提交
4660
{
4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673
	unsigned int chip_number;
	void __iomem *base_addr;

	cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
	/* Cy_HwReset is 0x1400 */
	cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
	/* Cy_ClrIntr is 0x1800 */
	udelay(500L);

	for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
		base_addr =
		    true_base_addr + (cy_chip_offset[chip_number] << index);
		mdelay(1);
4674
		if (readb(base_addr + (CyCCR << index)) != 0x00) {
4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690
			/*************
			printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
			chip_number, (unsigned long)base_addr);
			*************/
			return chip_number;
		}

		cy_writeb(base_addr + (CyGFRCR << index), 0);
		udelay(10L);

		/* The Cyclom-16Y does not decode address bit 9 and therefore
		   cannot distinguish between references to chip 0 and a non-
		   existent chip 4.  If the preceding clearing of the supposed
		   chip 4 GFRCR register appears at chip 0, there is no chip 4
		   and this must be a Cyclom-16Y, not a Cyclom-32Ye.
		 */
4691
		if (chip_number == 4 && readb(true_base_addr +
4692 4693 4694 4695 4696 4697 4698 4699
				(cy_chip_offset[0] << index) +
				(CyGFRCR << index)) == 0) {
			return chip_number;
		}

		cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
		mdelay(1);

4700
		if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4701 4702 4703 4704 4705 4706 4707
			/*
			   printk(" chip #%d at %#6lx is not responding ",
			   chip_number, (unsigned long)base_addr);
			   printk("(GFRCR stayed 0)\n",
			 */
			return chip_number;
		}
4708
		if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4709 4710 4711 4712 4713 4714 4715 4716 4717 4718
				0x40) {
			/*
			printk(" chip #%d at %#6lx is not valid (GFRCR == "
					"%#2x)\n",
					chip_number, (unsigned long)base_addr,
					base_addr[CyGFRCR<<index]);
			 */
			return chip_number;
		}
		cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4719
		if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4720 4721 4722 4723 4724 4725 4726 4727
			/* It is a CD1400 rev. J or later */
			/* Impossible to reach 5ms with this chip.
			   Changed to 2ms instead (f = 500 Hz). */
			cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
		} else {
			/* f = 200 Hz */
			cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
		}
L
Linus Torvalds 已提交
4728

4729 4730 4731
		/*
		   printk(" chip #%d at %#6lx is rev 0x%2x\n",
		   chip_number, (unsigned long)base_addr,
4732
		   readb(base_addr+(CyGFRCR<<index)));
4733 4734 4735 4736
		 */
	}
	return chip_number;
}				/* cyy_init_card */
L
Linus Torvalds 已提交
4737 4738 4739 4740 4741 4742 4743

/*
 * ---------------------------------------------------------------------
 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
 * sets global variables and return the number of ISA boards found.
 * ---------------------------------------------------------------------
 */
4744
static int __init cy_detect_isa(void)
L
Linus Torvalds 已提交
4745 4746
{
#ifdef CONFIG_ISA
4747 4748 4749
	unsigned short cy_isa_irq, nboard;
	void __iomem *cy_isa_address;
	unsigned short i, j, cy_isa_nchan;
L
Linus Torvalds 已提交
4750
#ifdef MODULE
4751
	int isparam = 0;
L
Linus Torvalds 已提交
4752 4753
#endif

4754
	nboard = 0;
L
Linus Torvalds 已提交
4755 4756 4757

#ifdef MODULE
	/* Check for module parameters */
4758 4759 4760 4761 4762 4763 4764
	for (i = 0; i < NR_CARDS; i++) {
		if (maddr[i] || i) {
			isparam = 1;
			cy_isa_addresses[i] = maddr[i];
		}
		if (!maddr[i])
			break;
L
Linus Torvalds 已提交
4765 4766 4767
	}
#endif

4768 4769 4770 4771
	/* scan the address table probing for Cyclom-Y/ISA boards */
	for (i = 0; i < NR_ISA_ADDRS; i++) {
		unsigned int isa_address = cy_isa_addresses[i];
		if (isa_address == 0x0000) {
J
Jiri Slaby 已提交
4772
			return nboard;
4773
		}
L
Linus Torvalds 已提交
4774

4775
		/* probe for CD1400... */
L
Linus Torvalds 已提交
4776
		cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4777 4778 4779 4780 4781
		cy_isa_nchan = CyPORTS_PER_CHIP *
			cyy_init_card(cy_isa_address, 0);
		if (cy_isa_nchan == 0) {
			continue;
		}
L
Linus Torvalds 已提交
4782 4783
#ifdef MODULE
		if (isparam && irq[i])
4784
			cy_isa_irq = irq[i];
L
Linus Torvalds 已提交
4785 4786
		else
#endif
4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801
			/* find out the board's irq by probing */
			cy_isa_irq = detect_isa_irq(cy_isa_address);
		if (cy_isa_irq == 0) {
			printk("Cyclom-Y/ISA found at 0x%lx ",
				(unsigned long)cy_isa_address);
			printk("but the IRQ could not be detected.\n");
			continue;
		}

		if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
			printk("Cyclom-Y/ISA found at 0x%lx ",
				(unsigned long)cy_isa_address);
			printk("but no more channels are available.\n");
			printk("Change NR_PORTS in cyclades.c and recompile "
					"kernel.\n");
J
Jiri Slaby 已提交
4802
			return nboard;
4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814
		}
		/* fill the next cy_card structure available */
		for (j = 0; j < NR_CARDS; j++) {
			if (cy_card[j].base_addr == 0)
				break;
		}
		if (j == NR_CARDS) {	/* no more cy_cards available */
			printk("Cyclom-Y/ISA found at 0x%lx ",
				(unsigned long)cy_isa_address);
			printk("but no more cards can be used .\n");
			printk("Change NR_CARDS in cyclades.c and recompile "
					"kernel.\n");
J
Jiri Slaby 已提交
4815
			return nboard;
4816 4817 4818 4819 4820 4821 4822 4823
		}

		/* allocate IRQ */
		if (request_irq(cy_isa_irq, cyy_interrupt,
				IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
			printk("Cyclom-Y/ISA found at 0x%lx ",
				(unsigned long)cy_isa_address);
			printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
J
Jiri Slaby 已提交
4824
			return nboard;
4825 4826 4827 4828 4829 4830 4831 4832 4833
		}

		/* set cy_card */
		cy_card[j].base_addr = cy_isa_address;
		cy_card[j].ctl_addr = NULL;
		cy_card[j].irq = (int)cy_isa_irq;
		cy_card[j].bus_index = 0;
		cy_card[j].first_line = cy_next_channel;
		cy_card[j].num_chips = cy_isa_nchan / 4;
4834
		cy_init_card(&cy_card[j], j);
4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845
		nboard++;

		/* print message */
		printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
			j + 1, (unsigned long)cy_isa_address,
			(unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
			cy_isa_irq);
		printk("%d channels starting from port %d.\n",
			cy_isa_nchan, cy_next_channel);
		cy_next_channel += cy_isa_nchan;
	}
J
Jiri Slaby 已提交
4846
	return nboard;
L
Linus Torvalds 已提交
4847
#else
J
Jiri Slaby 已提交
4848
	return 0;
4849 4850
#endif				/* CONFIG_ISA */
}				/* cy_detect_isa */
L
Linus Torvalds 已提交
4851

J
Jiri Slaby 已提交
4852 4853
#ifdef CONFIG_PCI
static void __devinit plx_init(void __iomem * addr, __u32 initctl)
L
Linus Torvalds 已提交
4854
{
4855
	/* Reset PLX */
4856
	cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
4857
	udelay(100L);
4858
	cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
4859 4860

	/* Reload Config. Registers from EEPROM */
4861
	cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
4862
	udelay(100L);
4863
	cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
L
Linus Torvalds 已提交
4864 4865
}

J
Jiri Slaby 已提交
4866 4867 4868
static int __devinit cy_init_Ze(unsigned long cy_pci_phys0,
		unsigned long cy_pci_phys2,
		struct RUNTIME_9060 __iomem *cy_pci_addr0,
J
Jiri Slaby 已提交
4869
		int cy_pci_irq, struct pci_dev *pdev)
J
Jiri Slaby 已提交
4870
{
J
Jiri Slaby 已提交
4871
	void __iomem *cy_pci_addr2;
J
Jiri Slaby 已提交
4872 4873 4874
	unsigned int j;
	unsigned short cy_pci_nchan;

J
Jiri Slaby 已提交
4875 4876
	cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ze_win);

J
Jiri Slaby 已提交
4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931
	readl(&cy_pci_addr0->mail_box_0);
#ifdef CY_PCI_DEBUG
	printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
		(ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
	printk("Cyclades-Z/PCI: New Cyclades-Z board.  FPGA not "
			"loaded\n");
#endif
	/* This must be the new Cyclades-Ze/PCI. */
	cy_pci_nchan = ZE_V1_NPORTS;

	if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
		printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
			"are available.\nChange NR_PORTS in cyclades.c "
			"and recompile kernel.\n",
			(ulong) cy_pci_phys2);
		return -EIO;
	}

	/* fill the next cy_card structure available */
	for (j = 0; j < NR_CARDS; j++) {
		if (cy_card[j].base_addr == 0)
			break;
	}
	if (j == NR_CARDS) {	/* no more cy_cards available */
		printk("Cyclades-Ze/PCI found at 0x%lx but no more "
			"cards can be used.\nChange NR_CARDS in "
			"cyclades.c and recompile kernel.\n",
			(ulong) cy_pci_phys2);
		return -EIO;
	}
#ifdef CONFIG_CYZ_INTR
	/* allocate IRQ only if board has an IRQ */
	if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
		if (request_irq(cy_pci_irq, cyz_interrupt,
				IRQF_SHARED, "Cyclades-Z",
				&cy_card[j])) {
			printk("Cyclom-Ze/PCI found at 0x%lx ",
				(ulong) cy_pci_phys2);
			printk("but could not allocate IRQ%d.\n",
				cy_pci_irq);
			return -EIO;
		}
	}
#endif				/* CONFIG_CYZ_INTR */

	/* set cy_card */
	cy_card[j].base_phys = cy_pci_phys2;
	cy_card[j].ctl_phys = cy_pci_phys0;
	cy_card[j].base_addr = cy_pci_addr2;
	cy_card[j].ctl_addr = cy_pci_addr0;
	cy_card[j].irq = (int)cy_pci_irq;
	cy_card[j].bus_index = 1;
	cy_card[j].first_line = cy_next_channel;
	cy_card[j].num_chips = -1;
	cy_card[j].pdev = pdev;
4932
	cy_init_card(&cy_card[j], j);
J
Jiri Slaby 已提交
4933
	pci_set_drvdata(pdev, &cy_card[j]);
J
Jiri Slaby 已提交
4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955

	/* print message */
#ifdef CONFIG_CYZ_INTR
	/* don't report IRQ if board is no IRQ */
	if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
		printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
			j + 1, (ulong) cy_pci_phys2,
			(ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
			(int)cy_pci_irq);
	else
#endif				/* CONFIG_CYZ_INTR */
		printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
			j + 1, (ulong) cy_pci_phys2,
			(ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));

	printk("%d channels starting from port %d.\n",
		cy_pci_nchan, cy_next_channel);
	cy_next_channel += cy_pci_nchan;

	return 0;
}

J
Jiri Slaby 已提交
4956 4957
static int __devinit cy_pci_probe(struct pci_dev *pdev,
		const struct pci_device_id *ent)
L
Linus Torvalds 已提交
4958
{
4959
	unsigned char cyy_rev_id;
J
Jiri Slaby 已提交
4960 4961
	unsigned char cy_pci_irq;
	__u32 cy_pci_phys0, cy_pci_phys2, mailbox;
4962
	void __iomem *cy_pci_addr0, *cy_pci_addr2;
J
Jiri Slaby 已提交
4963 4964
	unsigned int device_id;
	unsigned short j, cy_pci_nchan, plx_ver;
J
Jiri Slaby 已提交
4965
	int retval;
4966

J
Jiri Slaby 已提交
4967 4968 4969 4970 4971
	retval = pci_enable_device(pdev);
	if (retval) {
		dev_err(&pdev->dev, "cannot enable device\n");
		return retval;
	}
L
Linus Torvalds 已提交
4972

J
Jiri Slaby 已提交
4973 4974 4975 4976 4977
	/* read PCI configuration area */
	cy_pci_irq = pdev->irq;
	cy_pci_phys0 = pci_resource_start(pdev, 0);
	cy_pci_phys2 = pci_resource_start(pdev, 2);
	pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
L
Linus Torvalds 已提交
4978

J
Jiri Slaby 已提交
4979
	device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
L
Linus Torvalds 已提交
4980

J
Jiri Slaby 已提交
4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991
	if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
			device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
#ifdef CY_PCI_DEBUG
		printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
			pdev->bus->number, pdev->devfn);
		printk("rev_id=%d) IRQ%d\n",
			cyy_rev_id, (int)cy_pci_irq);
		printk("Cyclom-Y/PCI:found  winaddr=0x%lx "
			"ctladdr=0x%lx\n",
			(ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
#endif
L
Linus Torvalds 已提交
4992

J
Jiri Slaby 已提交
4993 4994 4995 4996 4997
		if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
			printk("  Warning: PCI I/O bit incorrectly "
				"set. Ignoring it...\n");
			pdev->resource[2].flags &= ~IORESOURCE_IO;
		}
L
Linus Torvalds 已提交
4998

J
Jiri Slaby 已提交
4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009
		/* Although we don't use this I/O region, we should
		   request it from the kernel anyway, to avoid problems
		   with other drivers accessing it. */
		retval = pci_request_regions(pdev, "Cyclom-Y");
		if (retval) {
			printk(KERN_ERR "cyclades: failed to reserve "
					"PCI resources\n");
			return retval;
		}
#if defined(__alpha__)
		if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {	/* below 1M? */
5010 5011 5012 5013 5014 5015
			printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
				pdev->bus->number, pdev->devfn);
			printk("rev_id=%d) IRQ%d\n",
				cyy_rev_id, (int)cy_pci_irq);
			printk("Cyclom-Y/PCI:found  winaddr=0x%lx "
				"ctladdr=0x%lx\n",
J
Jiri Slaby 已提交
5016 5017 5018 5019 5020 5021
				(ulong)cy_pci_phys2,
				(ulong)cy_pci_phys0);
			printk("Cyclom-Y/PCI not supported for low "
				"addresses in Alpha systems.\n");
			return -EIO;
		}
L
Linus Torvalds 已提交
5022
#endif
J
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5023 5024
		cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
		cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
L
Linus Torvalds 已提交
5025 5026

#ifdef CY_PCI_DEBUG
J
Jiri Slaby 已提交
5027 5028 5029
		printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
			"ctladdr=0x%lx\n",
			(u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
L
Linus Torvalds 已提交
5030
#endif
J
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5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049
		cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
				cyy_init_card(cy_pci_addr2, 1));
		if (cy_pci_nchan == 0) {
			printk("Cyclom-Y PCI host card with ");
			printk("no Serial-Modules at 0x%lx.\n",
				(ulong) cy_pci_phys2);
			return -EIO;
		}
		if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
			printk("Cyclom-Y/PCI found at 0x%lx ",
				(ulong) cy_pci_phys2);
			printk("but no channels are available.\n");
			printk("Change NR_PORTS in cyclades.c and "
					"recompile kernel.\n");
			return -EIO;
		}
		/* fill the next cy_card structure available */
		for (j = 0; j < NR_CARDS; j++) {
			if (cy_card[j].base_addr == 0)
5050
				break;
J
Jiri Slaby 已提交
5051 5052 5053 5054 5055 5056 5057 5058 5059
		}
		if (j == NR_CARDS) {	/* no more cy_cards available */
			printk("Cyclom-Y/PCI found at 0x%lx ",
				(ulong) cy_pci_phys2);
			printk("but no more cards can be used.\n");
			printk("Change NR_CARDS in cyclades.c and "
					"recompile kernel.\n");
			return -EIO;
		}
5060

J
Jiri Slaby 已提交
5061 5062 5063 5064 5065 5066 5067 5068 5069 5070
		/* allocate IRQ */
		retval = request_irq(cy_pci_irq, cyy_interrupt,
				IRQF_SHARED, "Cyclom-Y", &cy_card[j]);
		if (retval) {
			printk("Cyclom-Y/PCI found at 0x%lx ",
				(ulong) cy_pci_phys2);
			printk("but could not allocate IRQ%d.\n",
				cy_pci_irq);
			return retval;
		}
5071

J
Jiri Slaby 已提交
5072 5073 5074 5075 5076 5077 5078 5079 5080 5081
		/* set cy_card */
		cy_card[j].base_phys = (ulong) cy_pci_phys2;
		cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
		cy_card[j].base_addr = cy_pci_addr2;
		cy_card[j].ctl_addr = cy_pci_addr0;
		cy_card[j].irq = (int)cy_pci_irq;
		cy_card[j].bus_index = 1;
		cy_card[j].first_line = cy_next_channel;
		cy_card[j].num_chips = cy_pci_nchan / 4;
		cy_card[j].pdev = pdev;
5082
		cy_init_card(&cy_card[j], j);
J
Jiri Slaby 已提交
5083
		pci_set_drvdata(pdev, &cy_card[j]);
5084

J
Jiri Slaby 已提交
5085 5086 5087 5088 5089 5090
		/* enable interrupts in the PCI interface */
		plx_ver = readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
		switch (plx_ver) {
		case PLX_9050:

			cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
5091 5092
			break;

J
Jiri Slaby 已提交
5093 5094 5095
		case PLX_9060:
		case PLX_9080:
		default:	/* Old boards, use PLX_9060 */
5096 5097

			plx_init(cy_pci_addr0, 0x6c);
J
Jiri Slaby 已提交
5098 5099 5100 5101 5102
		/* For some yet unknown reason, once the PLX9060 reloads
		   the EEPROM, the IRQ is lost and, thus, we have to
		   re-write it to the PCI config. registers.
		   This will remain here until we find a permanent
		   fix. */
5103
			pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
J
Jiri Slaby 已提交
5104
					cy_pci_irq);
5105

J
Jiri Slaby 已提交
5106 5107 5108 5109
			cy_writew(cy_pci_addr0 + 0x68,
				readw(cy_pci_addr0 + 0x68) | 0x0900);
			break;
		}
5110

J
Jiri Slaby 已提交
5111 5112 5113 5114 5115 5116 5117
		/* print message */
		printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
			j + 1, (ulong)cy_pci_phys2,
			(ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
			(int)cy_pci_irq);
		printk("%d channels starting from port %d.\n",
			cy_pci_nchan, cy_next_channel);
L
Linus Torvalds 已提交
5118

J
Jiri Slaby 已提交
5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148 5149 5150 5151 5152 5153 5154 5155
		cy_next_channel += cy_pci_nchan;
	} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
		/* print message */
		printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
			pdev->bus->number, pdev->devfn);
		printk("rev_id=%d) IRQ%d\n",
			cyy_rev_id, (int)cy_pci_irq);
		printk("Cyclades-Z/PCI: found winaddr=0x%lx "
			"ctladdr=0x%lx\n",
			(ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
		printk("Cyclades-Z/PCI not supported for low "
			"addresses\n");
		return -EIO;
	} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
#ifdef CY_PCI_DEBUG
		printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
			pdev->bus->number, pdev->devfn);
		printk("rev_id=%d) IRQ%d\n",
			cyy_rev_id, (int)cy_pci_irq);
		printk("Cyclades-Z/PCI: found winaddr=0x%lx "
			"ctladdr=0x%lx\n",
			(ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
#endif
		cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);

		/* Disable interrupts on the PLX before resetting it */
		cy_writew(cy_pci_addr0 + 0x68,
			readw(cy_pci_addr0 + 0x68) & ~0x0900);

		plx_init(cy_pci_addr0, 0x6c);
		/* For some yet unknown reason, once the PLX9060 reloads
		   the EEPROM, the IRQ is lost and, thus, we have to
		   re-write it to the PCI config. registers.
		   This will remain here until we find a permanent
		   fix. */
		pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
					cy_pci_irq);
5156

J
Jiri Slaby 已提交
5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182
		mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
				cy_pci_addr0)->mail_box_0);

		if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
			printk("  Warning: PCI I/O bit incorrectly "
				"set. Ignoring it...\n");
			pdev->resource[2].flags &= ~IORESOURCE_IO;
		}

		/* Although we don't use this I/O region, we should
		   request it from the kernel anyway, to avoid problems
		   with other drivers accessing it. */
		retval = pci_request_regions(pdev, "Cyclades-Z");
		if (retval) {
			printk(KERN_ERR "cyclades: failed to reserve "
				"PCI resources\n");
			return retval;
		}

		if (mailbox == ZE_V1) {
			retval = cy_init_Ze(cy_pci_phys0, cy_pci_phys2,
					cy_pci_addr0, cy_pci_irq, pdev);
			return retval;
		} else {
			cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Zwin);
		}
L
Linus Torvalds 已提交
5183 5184

#ifdef CY_PCI_DEBUG
J
Jiri Slaby 已提交
5185 5186 5187 5188 5189 5190 5191 5192 5193 5194 5195 5196 5197 5198 5199 5200 5201 5202 5203 5204 5205 5206
		printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
			"ctladdr=0x%lx\n",
			(ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
		if (mailbox == ZO_V1) {
			cy_writel(&((struct RUNTIME_9060 *)
				(cy_pci_addr0))->loc_addr_base,
				WIN_CREG);
			printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
				"%lx\n", (ulong) (0xff &
				readl(&((struct CUSTOM_REG *)
					(cy_pci_addr2))->fpga_id)),
				(ulong)(0xff &
				readl(&((struct CUSTOM_REG *)
					(cy_pci_addr2))->
						fpga_version)));
			cy_writel(&((struct RUNTIME_9060 *)
				(cy_pci_addr0))->loc_addr_base,
				WIN_RAM);
		} else {
			printk("Cyclades-Z/PCI: New Cyclades-Z board.  "
					"FPGA not loaded\n");
		}
L
Linus Torvalds 已提交
5207
#endif
J
Jiri Slaby 已提交
5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225 5226
		/* The following clears the firmware id word.  This
		   ensures that the driver will not attempt to talk to
		   the board until it has been properly initialized.
		 */
		if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
			cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);

		/* This must be a Cyclades-8Zo/PCI.  The extendable
		   version will have a different device_id and will
		   be allocated its maximum number of ports. */
		cy_pci_nchan = 8;

		if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
			printk("Cyclades-8Zo/PCI found at 0x%lx but"
				"no channels are available.\nChange "
				"NR_PORTS in cyclades.c and recompile "
				"kernel.\n", (ulong)cy_pci_phys2);
			return -EIO;
		}
L
Linus Torvalds 已提交
5227

J
Jiri Slaby 已提交
5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238 5239
		/* fill the next cy_card structure available */
		for (j = 0; j < NR_CARDS; j++) {
			if (cy_card[j].base_addr == 0)
				break;
		}
		if (j == NR_CARDS) {	/* no more cy_cards available */
			printk("Cyclades-8Zo/PCI found at 0x%lx but"
				"no more cards can be used.\nChange "
				"NR_CARDS in cyclades.c and recompile "
				"kernel.\n", (ulong)cy_pci_phys2);
			return -EIO;
		}
5240
#ifdef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251
		/* allocate IRQ only if board has an IRQ */
		if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
			retval = request_irq(cy_pci_irq, cyz_interrupt,
					IRQF_SHARED, "Cyclades-Z",
					&cy_card[j]);
			if (retval) {
				printk("Cyclom-8Zo/PCI found at 0x%lx "
					"but could not allocate "
					"IRQ%d.\n", (ulong)cy_pci_phys2,
					cy_pci_irq);
				return retval;
5252
			}
J
Jiri Slaby 已提交
5253
		}
5254 5255
#endif				/* CONFIG_CYZ_INTR */

J
Jiri Slaby 已提交
5256 5257 5258 5259 5260 5261 5262 5263 5264 5265
		/* set cy_card */
		cy_card[j].base_phys = cy_pci_phys2;
		cy_card[j].ctl_phys = cy_pci_phys0;
		cy_card[j].base_addr = cy_pci_addr2;
		cy_card[j].ctl_addr = cy_pci_addr0;
		cy_card[j].irq = (int)cy_pci_irq;
		cy_card[j].bus_index = 1;
		cy_card[j].first_line = cy_next_channel;
		cy_card[j].num_chips = -1;
		cy_card[j].pdev = pdev;
5266
		cy_init_card(&cy_card[j], j);
J
Jiri Slaby 已提交
5267 5268 5269
		pci_set_drvdata(pdev, &cy_card[j]);

		/* print message */
L
Linus Torvalds 已提交
5270
#ifdef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5271 5272 5273 5274 5275 5276 5277
		/* don't report IRQ if board is no IRQ */
		if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
			printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
				"IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
				(ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
				(int)cy_pci_irq);
		else
5278
#endif				/* CONFIG_CYZ_INTR */
J
Jiri Slaby 已提交
5279 5280 5281 5282 5283 5284 5285 5286 5287 5288 5289 5290 5291 5292 5293 5294 5295 5296 5297 5298 5299 5300 5301 5302
			printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
				j + 1, (ulong)cy_pci_phys2,
				(ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));

		printk("%d channels starting from port %d.\n",
				cy_pci_nchan, cy_next_channel);
		cy_next_channel += cy_pci_nchan;
	}

	return 0;
}
#endif

/*
 * ---------------------------------------------------------------------
 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
 * sets global variables and return the number of PCI boards found.
 * ---------------------------------------------------------------------
 */
static int __init cy_detect_pci(void)
{
#ifdef CONFIG_PCI
	struct pci_dev *pdev = NULL;
	unsigned int i, device_id, dev_index = 0;
5303

J
Jiri Slaby 已提交
5304 5305 5306 5307 5308 5309 5310 5311 5312
	for (i = 0; i < NR_CARDS; i++) {
		/* look for a Cyclades card by vendor and device id */
		while ((device_id = cy_pci_dev_id[dev_index].device) != 0) {
			if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
						   device_id, pdev)) == NULL) {
				dev_index++;	/* try next device id */
			} else {
				break;	/* found a board */
			}
L
Linus Torvalds 已提交
5313
		}
J
Jiri Slaby 已提交
5314 5315 5316 5317 5318

		if (device_id == 0)
			break;

		i -= !!cy_pci_probe(pdev, &cy_pci_dev_id[dev_index]);
5319
	}
L
Linus Torvalds 已提交
5320

J
Jiri Slaby 已提交
5321
	return i;
L
Linus Torvalds 已提交
5322
#else
J
Jiri Slaby 已提交
5323
	return 0;
5324 5325
#endif				/* ifdef CONFIG_PCI */
}				/* cy_detect_pci */
L
Linus Torvalds 已提交
5326

J
Jiri Slaby 已提交
5327 5328 5329 5330
static void __devexit cy_pci_release(struct pci_dev *pdev)
{
#ifdef CONFIG_PCI
	struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5331
	unsigned int i;
J
Jiri Slaby 已提交
5332 5333 5334 5335 5336 5337 5338 5339 5340 5341 5342 5343 5344

	pci_iounmap(pdev, cinfo->base_addr);
	if (cinfo->ctl_addr)
		pci_iounmap(pdev, cinfo->ctl_addr);
	if (cinfo->irq
#ifndef CONFIG_CYZ_INTR
		&& cinfo->num_chips != -1 /* not a Z card */
#endif /* CONFIG_CYZ_INTR */
		)
		free_irq(cinfo->irq, cinfo);
	pci_release_regions(pdev);

	cinfo->base_addr = NULL;
5345 5346 5347 5348
	for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
		cy_port[i].line = -1;
		cy_port[i].magic = -1;
	}
J
Jiri Slaby 已提交
5349 5350 5351
#endif
}

L
Linus Torvalds 已提交
5352 5353 5354 5355
/*
 * This routine prints out the appropriate serial driver version number
 * and identifies which options were configured into this driver.
 */
5356
static inline void show_version(void)
L
Linus Torvalds 已提交
5357
{
J
Jiri Slaby 已提交
5358
	printk("Cyclades driver " CY_VERSION "\n");
5359 5360 5361 5362
	printk("        built %s %s\n", __DATE__, __TIME__);
}				/* show_version */

static int
L
Linus Torvalds 已提交
5363
cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5364
		int *eof, void *data)
L
Linus Torvalds 已提交
5365
{
5366 5367 5368 5369 5370 5371 5372 5373 5374 5375 5376 5377
	struct cyclades_port *info;
	int i;
	int len = 0;
	off_t begin = 0;
	off_t pos = 0;
	int size;
	__u32 cur_jifs = jiffies;

	size = sprintf(buf, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
			"IdleIn  Overruns  Ldisc\n");

	pos += size;
L
Linus Torvalds 已提交
5378 5379
	len += size;

5380 5381 5382 5383 5384 5385 5386
	/* Output one line for each known port */
	for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
		info = &cy_port[i];

		if (info->count)
			size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
				"%8lu %9lu %6ld\n", info->line,
J
Jiri Slaby 已提交
5387
				(cur_jifs - info->idle_stats.in_use) / HZ,
5388
				info->idle_stats.xmit_bytes,
J
Jiri Slaby 已提交
5389
				(cur_jifs - info->idle_stats.xmit_idle) / HZ,
5390
				info->idle_stats.recv_bytes,
J
Jiri Slaby 已提交
5391
				(cur_jifs - info->idle_stats.recv_idle) / HZ,
5392 5393 5394 5395 5396 5397 5398 5399 5400 5401 5402 5403 5404 5405 5406
				info->idle_stats.overruns,
				(long)info->tty->ldisc.num);
		else
			size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
				"%8lu %9lu %6ld\n",
				info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
		len += size;
		pos = begin + len;

		if (pos < offset) {
			len = 0;
			begin = pos;
		}
		if (pos > offset + length)
			goto done;
L
Linus Torvalds 已提交
5407
	}
5408
	*eof = 1;
L
Linus Torvalds 已提交
5409
done:
5410 5411 5412 5413 5414 5415 5416
	*start = buf + (offset - begin);	/* Start of wanted data */
	len -= (offset - begin);	/* Start slop */
	if (len > length)
		len = length;	/* Ending slop */
	if (len < 0)
		len = 0;
	return len;
L
Linus Torvalds 已提交
5417 5418 5419 5420 5421 5422 5423 5424 5425 5426 5427 5428 5429 5430 5431 5432 5433 5434 5435 5436
}

/* The serial driver boot-time initialization code!
    Hardware I/O ports are mapped to character special devices on a
    first found, first allocated manner.  That is, this code searches
    for Cyclom cards in the system.  As each is found, it is probed
    to discover how many chips (and thus how many ports) are present.
    These ports are mapped to the tty ports 32 and upward in monotonic
    fashion.  If an 8-port card is replaced with a 16-port card, the
    port mapping on a following card will shift.

    This approach is different from what is used in the other serial
    device driver because the Cyclom is more properly a multiplexer,
    not just an aggregation of serial ports on one card.

    If there are more cards with more ports than have been
    statically allocated above, a warning is printed and the
    extra ports are ignored.
 */

J
Jeff Dike 已提交
5437
static const struct tty_operations cy_ops = {
5438 5439 5440 5441 5442 5443 5444 5445 5446 5447 5448 5449 5450 5451 5452 5453 5454 5455 5456 5457
	.open = cy_open,
	.close = cy_close,
	.write = cy_write,
	.put_char = cy_put_char,
	.flush_chars = cy_flush_chars,
	.write_room = cy_write_room,
	.chars_in_buffer = cy_chars_in_buffer,
	.flush_buffer = cy_flush_buffer,
	.ioctl = cy_ioctl,
	.throttle = cy_throttle,
	.unthrottle = cy_unthrottle,
	.set_termios = cy_set_termios,
	.stop = cy_stop,
	.start = cy_start,
	.hangup = cy_hangup,
	.break_ctl = cy_break,
	.wait_until_sent = cy_wait_until_sent,
	.read_proc = cyclades_get_proc_info,
	.tiocmget = cy_tiocmget,
	.tiocmset = cy_tiocmset,
L
Linus Torvalds 已提交
5458 5459
};

5460
static int __init cy_init(void)
L
Linus Torvalds 已提交
5461
{
5462
	unsigned int i, nboards;
5463
	int retval = -ENOMEM;
5464 5465 5466

	cy_serial_driver = alloc_tty_driver(NR_PORTS);
	if (!cy_serial_driver)
5467
		goto err;
5468 5469 5470 5471 5472 5473 5474 5475 5476 5477 5478 5479 5480 5481 5482 5483 5484
	show_version();

	/* Initialize the tty_driver structure */

	cy_serial_driver->owner = THIS_MODULE;
	cy_serial_driver->driver_name = "cyclades";
	cy_serial_driver->name = "ttyC";
	cy_serial_driver->major = CYCLADES_MAJOR;
	cy_serial_driver->minor_start = 0;
	cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
	cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
	cy_serial_driver->init_termios = tty_std_termios;
	cy_serial_driver->init_termios.c_cflag =
	    B9600 | CS8 | CREAD | HUPCL | CLOCAL;
	cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
	tty_set_operations(cy_serial_driver, &cy_ops);

5485 5486 5487 5488 5489
	retval = tty_register_driver(cy_serial_driver);
	if (retval) {
		printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
		goto err_frtty;
	}
5490 5491 5492 5493 5494 5495

	for (i = 0; i < NR_CARDS; i++) {
		/* base_addr=0 indicates board not found */
		cy_card[i].base_addr = NULL;
	}

5496 5497 5498 5499 5500 5501
	/* invalidate remaining cy_port structures */
	for (i = 0; i < NR_PORTS; i++) {
		cy_port[i].line = -1;
		cy_port[i].magic = -1;
	}

5502 5503 5504 5505 5506 5507 5508 5509
	/* the code below is responsible to find the boards. Each different
	   type of board has its own detection routine. If a board is found,
	   the next cy_card structure available is set by the detection
	   routine. These functions are responsible for checking the
	   availability of cy_card and cy_port data structures and updating
	   the cy_next_channel. */

	/* look for isa boards */
5510
	nboards = cy_detect_isa();
5511 5512

	/* look for pci boards */
5513
	nboards += cy_detect_pci();
5514

5515 5516 5517 5518 5519 5520 5521 5522 5523 5524 5525 5526
	if (nboards == 0) {
		retval = -ENODEV;
		goto err_unr;
	}

	return 0;
err_unr:
	tty_unregister_driver(cy_serial_driver);
err_frtty:
	put_tty_driver(cy_serial_driver);
err:
	return retval;
5527
}				/* cy_init */
L
Linus Torvalds 已提交
5528

5529
static void __exit cy_cleanup_module(void)
L
Linus Torvalds 已提交
5530
{
5531
	int i, e1;
L
Linus Torvalds 已提交
5532 5533

#ifndef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5534
	del_timer_sync(&cyz_timerlist);
L
Linus Torvalds 已提交
5535 5536
#endif /* CONFIG_CYZ_INTR */

5537 5538 5539
	if ((e1 = tty_unregister_driver(cy_serial_driver)))
		printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
			e1);
L
Linus Torvalds 已提交
5540

5541
	put_tty_driver(cy_serial_driver);
L
Linus Torvalds 已提交
5542

5543 5544
	for (i = 0; i < NR_CARDS; i++) {
		if (cy_card[i].base_addr) {
J
Jiri Slaby 已提交
5545 5546 5547 5548
			if (cy_card[i].pdev) {
				cy_pci_release(cy_card[i].pdev);
				continue;
			}
5549 5550 5551 5552
			iounmap(cy_card[i].base_addr);
			if (cy_card[i].ctl_addr)
				iounmap(cy_card[i].ctl_addr);
			if (cy_card[i].irq
L
Linus Torvalds 已提交
5553
#ifndef CONFIG_CYZ_INTR
5554
				&& cy_card[i].num_chips != -1 /* not a Z card */
L
Linus Torvalds 已提交
5555
#endif /* CONFIG_CYZ_INTR */
5556 5557 5558 5559
				)
				free_irq(cy_card[i].irq, &cy_card[i]);
		}
	}
L
Linus Torvalds 已提交
5560 5561 5562 5563 5564 5565
} /* cy_cleanup_module */

module_init(cy_init);
module_exit(cy_cleanup_module);

MODULE_LICENSE("GPL");