cyclades.c 156.5 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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681
#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.
 */

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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.
 */
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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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858 859
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(KERN_WARNING "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(KERN_WARNING "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(KERN_WARNING "cyc Warning: bad magic number for serial "
				"struct (%s) in %s\n", name, routine);
878 879
		return 1;
	}
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#endif
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	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
J
Jiri Slaby 已提交
1050
		printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", 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
J
Jiri Slaby 已提交
1215
		printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", 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
J
Jiri Slaby 已提交
1439
		printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
L
Linus Torvalds 已提交
1440
#endif
1441 1442 1443 1444 1445 1446
		return IRQ_NONE;	/* spurious interrupt */
	}

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

J
Jiri Slaby 已提交
1447 1448 1449 1450
	/* card was not initialized yet (e.g. DEBUG_SHIRQ) */
	if (unlikely(card_base_addr == NULL))
		return IRQ_HANDLED;

1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461
	/* 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;
1462
			while ((status = readb(base_addr +
1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485
						(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
1486 1487 1488 1489 1490 1491 1492

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

static int
1493
cyz_fetch_msg(struct cyclades_card *cinfo,
K
Klaus Kudielka 已提交
1494
		__u32 * channel, __u8 * cmd, __u32 * param)
L
Linus Torvalds 已提交
1495
{
1496 1497 1498 1499 1500 1501 1502
	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
1503
		return -1;
1504
	}
1505
	zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1506 1507
	board_ctrl = &zfw_ctrl->board_ctrl;

1508
	loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1509 1510 1511
				  (cinfo->ctl_addr))->loc_doorbell);
	if (loc_doorbell) {
		*cmd = (char)(0xff & loc_doorbell);
1512 1513
		*channel = readl(&board_ctrl->fwcmd_channel);
		*param = (__u32) readl(&board_ctrl->fwcmd_param);
1514 1515 1516 1517 1518 1519
		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
1520 1521

static int
1522
cyz_issue_cmd(struct cyclades_card *cinfo,
K
Klaus Kudielka 已提交
1523
		__u32 channel, __u8 cmd, __u32 param)
L
Linus Torvalds 已提交
1524
{
1525 1526 1527
	struct FIRM_ID __iomem *firm_id;
	struct ZFW_CTRL __iomem *zfw_ctrl;
	struct BOARD_CTRL __iomem *board_ctrl;
K
Klaus Kudielka 已提交
1528
	__u32 __iomem *pci_doorbell;
1529 1530 1531 1532
	int index;

	firm_id = cinfo->base_addr + ID_ADDRESS;
	if (!ISZLOADED(*cinfo)) {
J
Jiri Slaby 已提交
1533
		return -1;
1534
	}
1535
	zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1536 1537 1538 1539 1540
	board_ctrl = &zfw_ctrl->board_ctrl;

	index = 0;
	pci_doorbell =
	    &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1541
	while ((readl(pci_doorbell) & 0xff) != 0) {
1542
		if (index++ == 1000) {
1543
			return (int)(readl(pci_doorbell) & 0xff);
1544 1545 1546 1547 1548 1549 1550
		}
		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
1551
	return 0;
1552
}				/* cyz_issue_cmd */
L
Linus Torvalds 已提交
1553 1554

static void
J
Jiri Slaby 已提交
1555 1556
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
1557
{
1558 1559
	struct cyclades_card *cinfo = &cy_card[info->card];
	struct tty_struct *tty = info->tty;
J
Jiri Slaby 已提交
1560
	int char_count;
1561
	int len;
L
Linus Torvalds 已提交
1562
#ifdef BLOCKMOVE
1563
	int small_count;
L
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1564
#else
1565
	char data;
L
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1566
#endif
J
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1567
	__u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
L
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1568

1569 1570 1571 1572
	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);
1573 1574 1575 1576
	if (rx_put >= rx_get)
		char_count = rx_put - rx_get;
	else
		char_count = rx_put - rx_get + rx_bufsize;
L
Linus Torvalds 已提交
1577

1578 1579 1580
	if (char_count) {
		info->last_active = jiffies;
		info->jiffies[1] = jiffies;
L
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1581 1582

#ifdef CY_ENABLE_MONITORING
1583 1584 1585 1586 1587
		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;
L
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1588
#endif
1589 1590 1591 1592 1593 1594
		if (tty == 0) {
			/* flush received characters */
			new_rx_get = (new_rx_get + char_count) &
					(rx_bufsize - 1);
			info->rflush_count++;
		} else {
L
Linus Torvalds 已提交
1595
#ifdef BLOCKMOVE
1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618
		/* 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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1619
#else
1620 1621
			len = tty_buffer_request_room(tty, char_count);
			while (len--) {
1622
				data = readb(cinfo->base_addr + rx_bufaddr +
1623 1624 1625 1626 1627 1628
						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++;
			}
L
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1629 1630
#endif
#ifdef CONFIG_CYZ_INTR
1631 1632
		/* Recalculate the number of chars in the RX buffer and issue
		   a cmd in case it's higher than the RX high water mark */
1633
			rx_put = readl(&buf_ctrl->rx_put);
1634 1635 1636 1637
			if (rx_put >= rx_get)
				char_count = rx_put - rx_get;
			else
				char_count = rx_put - rx_get + rx_bufsize;
1638
			if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
1639 1640
				cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
			}
L
Linus Torvalds 已提交
1641
#endif
1642 1643 1644 1645 1646
			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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1647 1648 1649 1650
	}
}

static void
J
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1651 1652
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
1653
{
1654 1655 1656
	struct cyclades_card *cinfo = &cy_card[info->card];
	struct tty_struct *tty = info->tty;
	char data;
J
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1657
	int char_count;
L
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1658
#ifdef BLOCKMOVE
1659
	int small_count;
L
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1660
#endif
J
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1661
	__u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
L
Linus Torvalds 已提交
1662

1663 1664
	if (info->xmit_cnt <= 0)	/* Nothing to transmit */
		return;
L
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1665

1666 1667 1668 1669
	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);
1670 1671 1672 1673
	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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1674

1675
	if (char_count) {
L
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1676

1677 1678 1679
		if (tty == 0) {
			goto ztxdone;
		}
L
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1680

1681 1682
		if (info->x_char) {	/* send special char */
			data = info->x_char;
L
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1683

1684 1685 1686 1687 1688 1689 1690 1691
			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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1692
#ifdef BLOCKMOVE
1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712
		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;
		}
L
Linus Torvalds 已提交
1713
#else
1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726
		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;
		}
L
Linus Torvalds 已提交
1727
#endif
1728 1729 1730 1731 1732 1733
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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1734 1735 1736
	}
}

1737
static void cyz_handle_cmd(struct cyclades_card *cinfo)
L
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1738
{
1739 1740
	struct tty_struct *tty;
	struct cyclades_port *info;
J
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1741 1742 1743 1744 1745
	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
1746 1747 1748 1749
	__u32 channel;
	__u8 cmd;
	__u32 param;
	__u32 hw_ver, fw_ver;
1750 1751 1752 1753
	int special_count;
	int delta_count;

	firm_id = cinfo->base_addr + ID_ADDRESS;
1754
	zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1755
	board_ctrl = &zfw_ctrl->board_ctrl;
1756 1757
	fw_ver = readl(&board_ctrl->fw_version);
	hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1758 1759 1760 1761 1762 1763 1764 1765
			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
Linus Torvalds 已提交
1766
		}
1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790
		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) :
1791
						readl(&ch_ctrl->rs_status)) &
1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811
						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;
L
Linus Torvalds 已提交
1812
#ifdef Z_WAKE
1813 1814 1815
		case C_CM_IOCTLW:
			cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
			break;
L
Linus Torvalds 已提交
1816 1817
#endif
#ifdef CONFIG_CYZ_INTR
1818 1819 1820 1821
		case C_CM_RXHIWM:
		case C_CM_RXNNDT:
		case C_CM_INTBACK2:
			/* Reception Interrupt */
L
Linus Torvalds 已提交
1822
#ifdef CY_DEBUG_INTERRUPTS
J
Jiri Slaby 已提交
1823 1824
			printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
					"port %ld\n", info->card, channel);
L
Linus Torvalds 已提交
1825
#endif
1826 1827 1828 1829 1830 1831
			cyz_handle_rx(info, ch_ctrl, buf_ctrl);
			break;
		case C_CM_TXBEMPTY:
		case C_CM_TXLOWWM:
		case C_CM_INTBACK:
			/* Transmission Interrupt */
L
Linus Torvalds 已提交
1832
#ifdef CY_DEBUG_INTERRUPTS
J
Jiri Slaby 已提交
1833 1834
			printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
					"port %ld\n", info->card, channel);
L
Linus Torvalds 已提交
1835
#endif
1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848
			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
Linus Torvalds 已提交
1849 1850 1851 1852
	}
}

#ifdef CONFIG_CYZ_INTR
1853
static irqreturn_t cyz_interrupt(int irq, void *dev_id)
L
Linus Torvalds 已提交
1854
{
1855
	struct cyclades_card *cinfo;
L
Linus Torvalds 已提交
1856

1857
	if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
L
Linus Torvalds 已提交
1858
#ifdef CY_DEBUG_INTERRUPTS
J
Jiri Slaby 已提交
1859
		printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
L
Linus Torvalds 已提交
1860
#endif
1861 1862
		return IRQ_NONE;	/* spurious interrupt */
	}
L
Linus Torvalds 已提交
1863

1864
	if (!ISZLOADED(*cinfo)) {
L
Linus Torvalds 已提交
1865
#ifdef CY_DEBUG_INTERRUPTS
J
Jiri Slaby 已提交
1866 1867
		printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
				"(IRQ%d).\n", irq);
L
Linus Torvalds 已提交
1868
#endif
1869 1870
		return IRQ_NONE;
	}
L
Linus Torvalds 已提交
1871

1872 1873
	/* Handle the interrupts */
	cyz_handle_cmd(cinfo);
L
Linus Torvalds 已提交
1874

1875 1876
	return IRQ_HANDLED;
}				/* cyz_interrupt */
L
Linus Torvalds 已提交
1877

1878
static void cyz_rx_restart(unsigned long arg)
L
Linus Torvalds 已提交
1879
{
1880 1881 1882
	struct cyclades_port *info = (struct cyclades_port *)arg;
	int retval;
	int card = info->card;
K
Klaus Kudielka 已提交
1883
	__u32 channel = (info->line) - (cy_card[card].first_line);
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) {
J
Jiri Slaby 已提交
1889
		printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1890 1891 1892 1893
			info->line, retval);
	}
	cyz_rx_full_timer[info->line].function = NULL;
	CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
1894 1895
}

1896
#else				/* CONFIG_CYZ_INTR */
L
Linus Torvalds 已提交
1897

1898
static void cyz_poll(unsigned long arg)
L
Linus Torvalds 已提交
1899
{
1900 1901 1902
	struct cyclades_card *cinfo;
	struct cyclades_port *info;
	struct tty_struct *tty;
J
Jiri Slaby 已提交
1903 1904 1905 1906 1907
	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
1908
	unsigned long expires = jiffies + HZ;
1909
	int card, port;
L
Linus Torvalds 已提交
1910

1911 1912 1913 1914 1915 1916 1917 1918 1919 1920
	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 +
1921
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
1922
		board_ctrl = &(zfw_ctrl->board_ctrl);
L
Linus Torvalds 已提交
1923 1924

	/* Skip first polling cycle to avoid racing conditions with the FW */
1925
		if (!cinfo->intr_enabled) {
1926
			cinfo->nports = (int)readl(&board_ctrl->n_channel);
1927 1928 1929
			cinfo->intr_enabled = 1;
			continue;
		}
L
Linus Torvalds 已提交
1930

1931
		cyz_handle_cmd(cinfo);
L
Linus Torvalds 已提交
1932

1933 1934 1935 1936 1937
		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
Linus Torvalds 已提交
1938

1939 1940 1941 1942 1943
			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
Jiri Slaby 已提交
1944
		expires = jiffies + cyz_polling_cycle;
L
Linus Torvalds 已提交
1945
	}
J
Jiri Slaby 已提交
1946
	mod_timer(&cyz_timerlist, expires);
1947
}				/* cyz_poll */
L
Linus Torvalds 已提交
1948

1949
#endif				/* CONFIG_CYZ_INTR */
L
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1950 1951 1952 1953 1954 1955 1956

/********** 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.
 */
1957
static int startup(struct cyclades_port *info)
L
Linus Torvalds 已提交
1958
{
1959 1960 1961 1962 1963
	unsigned long flags;
	int retval = 0;
	void __iomem *base_addr;
	int card, chip, channel, index;
	unsigned long page;
L
Linus Torvalds 已提交
1964

1965 1966
	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
L
Linus Torvalds 已提交
1967

1968 1969 1970
	page = get_zeroed_page(GFP_KERNEL);
	if (!page)
		return -ENOMEM;
L
Linus Torvalds 已提交
1971

1972
	CY_LOCK(info, flags);
L
Linus Torvalds 已提交
1973

1974 1975 1976 1977
	if (info->flags & ASYNC_INITIALIZED) {
		free_page(page);
		goto errout;
	}
L
Linus Torvalds 已提交
1978

1979 1980 1981 1982 1983 1984 1985
	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
1986

1987 1988 1989 1990
	if (info->xmit_buf)
		free_page(page);
	else
		info->xmit_buf = (unsigned char *)page;
L
Linus Torvalds 已提交
1991

1992
	CY_UNLOCK(info, flags);
L
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1993

1994
	set_line_char(info);
L
Linus Torvalds 已提交
1995

1996 1997 1998 1999 2000 2001
	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
2002 2003

#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2004 2005 2006
		printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
				"base_addr %p\n",
				card, chip, channel, base_addr);
L
Linus Torvalds 已提交
2007
#endif
2008
		CY_LOCK(info, flags);
L
Linus Torvalds 已提交
2009

2010
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
L
Linus Torvalds 已提交
2011

2012 2013 2014
		cy_writeb(base_addr + (CyRTPR << index),
			(info->default_timeout ? info->default_timeout : 0x02));
		/* 10ms rx timeout */
L
Linus Torvalds 已提交
2015

2016 2017
		cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
				index);
L
Linus Torvalds 已提交
2018

2019 2020 2021
		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
2022 2023

#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
2024 2025
		printk(KERN_DEBUG "cyc:startup raising DTR\n");
		printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2026 2027
			readb(base_addr + (CyMSVR1 << index)),
			readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
2028 2029
#endif

2030
		cy_writeb(base_addr + (CySRER << index),
2031
			readb(base_addr + (CySRER << index)) | CyRxData);
2032
		info->flags |= ASYNC_INITIALIZED;
L
Linus Torvalds 已提交
2033

2034 2035 2036 2037 2038 2039 2040 2041 2042
		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
2043

2044
		CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
2045

2046 2047 2048 2049 2050 2051
	} 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
Linus Torvalds 已提交
2052

2053
		base_addr = cy_card[card].base_addr;
L
Linus Torvalds 已提交
2054

2055 2056 2057 2058
		firm_id = base_addr + ID_ADDRESS;
		if (!ISZLOADED(cy_card[card])) {
			return -ENODEV;
		}
L
Linus Torvalds 已提交
2059

2060
		zfw_ctrl = cy_card[card].base_addr +
2061
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
2062 2063
		board_ctrl = &zfw_ctrl->board_ctrl;
		ch_ctrl = zfw_ctrl->ch_ctrl;
L
Linus Torvalds 已提交
2064 2065

#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2066 2067
		printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
			"base_addr %p\n", card, channel, base_addr);
L
Linus Torvalds 已提交
2068
#endif
2069
		CY_LOCK(info, flags);
L
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2070

2071
		cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
L
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2072 2073
#ifdef Z_WAKE
#ifdef CONFIG_CYZ_INTR
2074 2075 2076
		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
2077
#else
2078 2079 2080
		cy_writel(&ch_ctrl[channel].intr_enable,
			  C_IN_IOCTLW | C_IN_MDCD);
#endif				/* CONFIG_CYZ_INTR */
L
Linus Torvalds 已提交
2081 2082
#else
#ifdef CONFIG_CYZ_INTR
2083 2084 2085
		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
2086
#else
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) {
J
Jiri Slaby 已提交
2093 2094
			printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
				"%x\n", info->line, retval);
2095
		}
L
Linus Torvalds 已提交
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) {
J
Jiri Slaby 已提交
2101 2102
			printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
				"%x\n", info->line, retval);
2103
		}
L
Linus Torvalds 已提交
2104

2105 2106 2107
		/* set timeout !!! */
		/* set RTS and DTR !!! */
		cy_writel(&ch_ctrl[channel].rs_control,
2108
			readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2109 2110 2111 2112
			C_RS_DTR);
		retval = cyz_issue_cmd(&cy_card[info->card], channel,
				C_CM_IOCTLM, 0L);
		if (retval != 0) {
J
Jiri Slaby 已提交
2113 2114
			printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
				"%x\n", info->line, retval);
2115
		}
L
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2116
#ifdef CY_DEBUG_DTR
J
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2117
		printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
L
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2118 2119
#endif

2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131
		/* 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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2132

2133
		CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
2134 2135 2136
	}

#ifdef CY_DEBUG_OPEN
J
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2137
	printk(KERN_DEBUG "cyc startup done\n");
L
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2138 2139 2140 2141 2142 2143
#endif
	return 0;

errout:
	CY_UNLOCK(info, flags);
	return retval;
2144
}				/* startup */
L
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2145

2146
static void start_xmit(struct cyclades_port *info)
L
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2147
{
2148 2149 2150
	unsigned long flags;
	void __iomem *base_addr;
	int card, chip, channel, index;
L
Linus Torvalds 已提交
2151

2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163
	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),
2164
			readb(base_addr + (CySRER << index)) | CyTxRdy);
2165 2166
		CY_UNLOCK(info, flags);
	} else {
L
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2167
#ifdef CONFIG_CYZ_INTR
2168
		int retval;
L
Linus Torvalds 已提交
2169

2170 2171 2172 2173
		CY_LOCK(info, flags);
		retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
				0L);
		if (retval != 0) {
J
Jiri Slaby 已提交
2174 2175
			printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
				"%x\n", info->line, retval);
2176 2177 2178 2179 2180 2181 2182
		}
		CY_UNLOCK(info, flags);
#else				/* CONFIG_CYZ_INTR */
		/* Don't have to do anything at this time */
#endif				/* CONFIG_CYZ_INTR */
	}
}				/* start_xmit */
L
Linus Torvalds 已提交
2183 2184 2185 2186 2187

/*
 * This routine shuts down a serial port; interrupts are disabled,
 * and DTR is dropped if the hangup on close termio flag is on.
 */
2188
static void shutdown(struct cyclades_port *info)
L
Linus Torvalds 已提交
2189
{
2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205
	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
2206 2207

#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2208 2209 2210
		printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
				"channel %d, base_addr %p\n",
				card, chip, channel, base_addr);
L
Linus Torvalds 已提交
2211 2212
#endif

2213 2214 2215 2216
		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
2217

2218 2219 2220 2221 2222 2223 2224 2225 2226 2227
		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
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2228
#ifdef CY_DEBUG_DTR
J
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2229 2230
			printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2231 2232
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
2233
#endif
2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251
		}
		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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2252
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2253 2254
		printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
			"base_addr %p\n", card, channel, base_addr);
L
Linus Torvalds 已提交
2255 2256
#endif

2257 2258 2259 2260
		firm_id = base_addr + ID_ADDRESS;
		if (!ISZLOADED(cy_card[card])) {
			return;
		}
L
Linus Torvalds 已提交
2261

2262
		zfw_ctrl = cy_card[card].base_addr +
2263
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
2264 2265
		board_ctrl = &zfw_ctrl->board_ctrl;
		ch_ctrl = zfw_ctrl->ch_ctrl;
L
Linus Torvalds 已提交
2266

2267
		CY_LOCK(info, flags);
L
Linus Torvalds 已提交
2268

2269 2270 2271 2272 2273
		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
2274
		}
2275 2276 2277

		if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
			cy_writel(&ch_ctrl[channel].rs_control,
2278
				(__u32)(readl(&ch_ctrl[channel].rs_control) &
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) {
J
Jiri Slaby 已提交
2283 2284
				printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
					"was %x\n", info->line, retval);
2285
			}
L
Linus Torvalds 已提交
2286
#ifdef CY_DEBUG_DTR
J
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2287
			printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
L
Linus Torvalds 已提交
2288
#endif
2289
		}
L
Linus Torvalds 已提交
2290

2291 2292 2293 2294 2295 2296 2297
		if (info->tty) {
			set_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		info->flags &= ~ASYNC_INITIALIZED;

		CY_UNLOCK(info, flags);
	}
L
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2298 2299

#ifdef CY_DEBUG_OPEN
J
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2300
	printk(KERN_DEBUG "cyc shutdown done\n");
L
Linus Torvalds 已提交
2301
#endif
2302
}				/* shutdown */
L
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2303 2304 2305 2306 2307 2308 2309 2310

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

static int
2311 2312
block_til_ready(struct tty_struct *tty, struct file *filp,
		struct cyclades_port *info)
L
Linus Torvalds 已提交
2313
{
2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331
	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
2332
		return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
L
Linus Torvalds 已提交
2333
	}
2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352

	/*
	 * 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
2353
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2354 2355
	printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
		"count = %d\n", info->line, info->count);
L
Linus Torvalds 已提交
2356
#endif
2357 2358 2359 2360
	CY_LOCK(info, flags);
	if (!tty_hung_up_p(filp))
		info->count--;
	CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
2361
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2362 2363
	printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
		"%d\n", current->pid, info->count);
L
Linus Torvalds 已提交
2364
#endif
2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381
	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
2382
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
2383 2384 2385
				printk(KERN_DEBUG "cyc:block_til_ready raising "
					"DTR\n");
				printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2386 2387
					readb(base_addr + (CyMSVR1 << index)),
					readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
2388
#endif
2389 2390
			}
			CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
2391

2392 2393 2394 2395 2396 2397 2398
			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
2399

2400 2401 2402 2403
			CY_LOCK(info, flags);
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2404
					(readb(base_addr +
2405 2406 2407 2408
						(CyMSVR1 << index)) & CyDCD))) {
				CY_UNLOCK(info, flags);
				break;
			}
L
Linus Torvalds 已提交
2409 2410
			CY_UNLOCK(info, flags);

2411 2412 2413 2414
			if (signal_pending(current)) {
				retval = -ERESTARTSYS;
				break;
			}
L
Linus Torvalds 已提交
2415
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2416 2417 2418
			printk(KERN_DEBUG "cyc block_til_ready blocking: "
				"ttyC%d, count = %d\n",
				info->line, info->count);
L
Linus Torvalds 已提交
2419
#endif
2420
			schedule();
L
Linus Torvalds 已提交
2421
		}
2422 2423 2424 2425 2426 2427 2428 2429 2430 2431
	} 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)) {
2432
			__set_current_state(TASK_RUNNING);
2433 2434 2435 2436
			remove_wait_queue(&info->open_wait, &wait);
			return -EINVAL;
		}

2437
		zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2438 2439 2440 2441 2442 2443
		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,
2444 2445
					readl(&ch_ctrl[channel].rs_control) |
					C_RS_RTS | C_RS_DTR);
2446
				retval = cyz_issue_cmd(&cy_card[info->card],
2447
					channel, C_CM_IOCTLM, 0L);
2448
				if (retval != 0) {
J
Jiri Slaby 已提交
2449 2450
					printk(KERN_ERR "cyc:block_til_ready "
						"retval on ttyC%d was %x\n",
2451 2452
						info->line, retval);
				}
L
Linus Torvalds 已提交
2453
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
2454 2455
				printk(KERN_DEBUG "cyc:block_til_ready raising "
					"Z DTR\n");
L
Linus Torvalds 已提交
2456
#endif
2457
			}
L
Linus Torvalds 已提交
2458

2459 2460 2461 2462 2463 2464 2465 2466
			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) ||
2467
					(readl(&ch_ctrl[channel].rs_status) &
2468 2469 2470 2471 2472 2473 2474
						C_RS_DCD))) {
				break;
			}
			if (signal_pending(current)) {
				retval = -ERESTARTSYS;
				break;
			}
L
Linus Torvalds 已提交
2475
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2476 2477 2478
			printk(KERN_DEBUG "cyc block_til_ready blocking: "
				"ttyC%d, count = %d\n",
				info->line, info->count);
L
Linus Torvalds 已提交
2479
#endif
2480 2481
			schedule();
		}
L
Linus Torvalds 已提交
2482
	}
2483
	__set_current_state(TASK_RUNNING);
2484 2485 2486
	remove_wait_queue(&info->open_wait, &wait);
	if (!tty_hung_up_p(filp)) {
		info->count++;
L
Linus Torvalds 已提交
2487
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2488 2489
		printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
			"count to %d\n", current->pid, info->count);
L
Linus Torvalds 已提交
2490
#endif
2491 2492
	}
	info->blocked_open--;
L
Linus Torvalds 已提交
2493
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2494 2495
	printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
		"count = %d\n", info->line, info->count);
L
Linus Torvalds 已提交
2496
#endif
2497 2498 2499 2500 2501
	if (retval)
		return retval;
	info->flags |= ASYNC_NORMAL_ACTIVE;
	return 0;
}				/* block_til_ready */
L
Linus Torvalds 已提交
2502 2503 2504 2505 2506

/*
 * This routine is called whenever a serial port is opened.  It
 * performs the serial-specific initialization for the tty structure.
 */
2507
static int cy_open(struct tty_struct *tty, struct file *filp)
L
Linus Torvalds 已提交
2508
{
2509 2510
	struct cyclades_port *info;
	int retval, line;
L
Linus Torvalds 已提交
2511

2512 2513 2514 2515 2516 2517 2518 2519
	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
2520

2521 2522 2523 2524 2525 2526 2527 2528 2529
	/* 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)) {
2530
			if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2531 2532
					 (cinfo->ctl_addr))->mail_box_0)) &&
					Z_FPGA_CHECK(*cinfo)) &&
2533
					(ZFIRM_HLT == readl(
2534
						&firm_id->signature))) {
J
Jiri Slaby 已提交
2535 2536 2537 2538
				printk(KERN_ERR "cyc:Cyclades-Z Error: you "
					"need an external power supply for "
					"this number of ports.\nFirmware "
					"halted.\n");
2539
			} else {
J
Jiri Slaby 已提交
2540 2541
				printk(KERN_ERR "cyc:Cyclades-Z firmware not "
					"yet loaded\n");
2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554
			}
			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 +
2555 2556
					(readl(&firm_id->zfwctrl_addr) &
					 0xfffff);
2557 2558 2559 2560 2561

				board_ctrl = &zfw_ctrl->board_ctrl;

				/* Enable interrupts on the PLX chip */
				cy_writew(cinfo->ctl_addr + 0x68,
2562
					readw(cinfo->ctl_addr + 0x68) | 0x0900);
2563 2564 2565 2566
				/* Enable interrupts on the FW */
				retval = cyz_issue_cmd(cinfo, 0,
						C_CM_IRQ_ENBL, 0L);
				if (retval != 0) {
J
Jiri Slaby 已提交
2567 2568
					printk(KERN_ERR "cyc:IRQ enable retval "
						"was %x\n", retval);
2569 2570
				}
				cinfo->nports =
2571
					(int)readl(&board_ctrl->n_channel);
2572 2573
				cinfo->intr_enabled = 1;
			}
L
Linus Torvalds 已提交
2574
		}
2575 2576 2577 2578
#endif				/* CONFIG_CYZ_INTR */
		/* Make sure this Z port really exists in hardware */
		if (info->line > (cinfo->first_line + cinfo->nports - 1))
			return -ENODEV;
L
Linus Torvalds 已提交
2579 2580
	}
#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
2581
	printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2582
#endif
2583 2584 2585 2586 2587
	tty->driver_data = info;
	info->tty = tty;
	if (serial_paranoia_check(info, tty->name, "cy_open")) {
		return -ENODEV;
	}
L
Linus Torvalds 已提交
2588
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2589 2590
	printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
			info->count);
L
Linus Torvalds 已提交
2591
#endif
2592
	info->count++;
L
Linus Torvalds 已提交
2593
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2594
	printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2595
		current->pid, info->count);
L
Linus Torvalds 已提交
2596 2597
#endif

2598 2599 2600 2601 2602 2603
	/*
	 * 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);
J
Jiri Slaby 已提交
2604
		return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2605
	}
L
Linus Torvalds 已提交
2606

2607 2608 2609 2610 2611 2612 2613
	/*
	 * Start up serial port
	 */
	retval = startup(info);
	if (retval) {
		return retval;
	}
L
Linus Torvalds 已提交
2614

2615 2616
	retval = block_til_ready(tty, filp, info);
	if (retval) {
L
Linus Torvalds 已提交
2617
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2618 2619
		printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
			"with %d\n", retval);
L
Linus Torvalds 已提交
2620
#endif
2621 2622
		return retval;
	}
L
Linus Torvalds 已提交
2623

2624
	info->throttle = 0;
L
Linus Torvalds 已提交
2625

2626
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2627
	printk(KERN_DEBUG "cyc:cy_open done\n");
2628 2629 2630
#endif
	return 0;
}				/* cy_open */
L
Linus Torvalds 已提交
2631 2632 2633 2634

/*
 * cy_wait_until_sent() --- wait until the transmitter is empty
 */
2635
static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
L
Linus Torvalds 已提交
2636
{
2637
	struct cyclades_port *info = tty->driver_data;
2638 2639 2640 2641 2642 2643 2644 2645 2646 2647
	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
Linus Torvalds 已提交
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 2676
	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
Linus Torvalds 已提交
2677
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
J
Jiri Slaby 已提交
2678 2679
	printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
		timeout, char_time, jiffies);
L
Linus Torvalds 已提交
2680
#endif
2681 2682 2683 2684 2685 2686 2687 2688
	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);
2689
		while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
L
Linus Torvalds 已提交
2690
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
J
Jiri Slaby 已提交
2691
			printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
L
Linus Torvalds 已提交
2692
#endif
2693 2694 2695 2696 2697 2698 2699
			if (msleep_interruptible(jiffies_to_msecs(char_time)))
				break;
			if (timeout && time_after(jiffies, orig_jiffies +
					timeout))
				break;
		}
	} else {
J
Jiri Slaby 已提交
2700
		/* Nothing to do! */
L
Linus Torvalds 已提交
2701
	}
2702 2703
	/* Run one more char cycle */
	msleep_interruptible(jiffies_to_msecs(char_time * 5));
L
Linus Torvalds 已提交
2704
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
J
Jiri Slaby 已提交
2705
	printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
L
Linus Torvalds 已提交
2706 2707 2708 2709 2710 2711
#endif
}

/*
 * This routine is called when a particular tty device is closed.
 */
2712
static void cy_close(struct tty_struct *tty, struct file *filp)
L
Linus Torvalds 已提交
2713
{
2714
	struct cyclades_port *info = tty->driver_data;
2715
	unsigned long flags;
L
Linus Torvalds 已提交
2716 2717

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
2718
	printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2719 2720
#endif

2721 2722 2723
	if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
		return;
	}
L
Linus Torvalds 已提交
2724

2725 2726 2727 2728 2729 2730
	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
Linus Torvalds 已提交
2731
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2732 2733
	printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
		info->count);
L
Linus Torvalds 已提交
2734
#endif
2735 2736 2737 2738 2739 2740 2741 2742
	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.
		 */
J
Jiri Slaby 已提交
2743 2744
		printk(KERN_ERR "cyc:cy_close: bad serial port count; "
			"tty->count is 1, info->count is %d\n", info->count);
2745 2746
		info->count = 1;
	}
L
Linus Torvalds 已提交
2747
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2748
	printk(KERN_DEBUG  "cyc:cy_close at (%d): decrementing count to %d\n",
2749
		current->pid, info->count - 1);
L
Linus Torvalds 已提交
2750
#endif
2751
	if (--info->count < 0) {
L
Linus Torvalds 已提交
2752
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2753
		printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
L
Linus Torvalds 已提交
2754
#endif
2755
		info->count = 0;
L
Linus Torvalds 已提交
2756
	}
2757 2758 2759 2760 2761
	if (info->count) {
		CY_UNLOCK(info, flags);
		return;
	}
	info->flags |= ASYNC_CLOSING;
L
Linus Torvalds 已提交
2762

2763 2764 2765 2766 2767 2768 2769 2770
	/*
	 * 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
2771
	}
2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782
	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),
2783
			  readb(base_addr + (CySRER << index)) & ~CyRxData);
2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796
		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 =
2797
		    base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2798 2799 2800 2801
		struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
		int channel = info->line - cy_card[info->card].first_line;
		int retval;

2802
		if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2803 2804 2805
			retval = cyz_issue_cmd(&cy_card[info->card], channel,
						C_CM_IOCTLW, 0L);
			if (retval != 0) {
J
Jiri Slaby 已提交
2806 2807
				printk(KERN_DEBUG "cyc:cy_close retval on "
					"ttyC%d was %x\n", info->line, retval);
2808 2809 2810 2811 2812
			}
			CY_UNLOCK(info, flags);
			interruptible_sleep_on(&info->shutdown_wait);
			CY_LOCK(info, flags);
		}
L
Linus Torvalds 已提交
2813
#endif
2814 2815
	}

L
Linus Torvalds 已提交
2816
	CY_UNLOCK(info, flags);
2817 2818 2819 2820
	shutdown(info);
	if (tty->driver->flush_buffer)
		tty->driver->flush_buffer(tty);
	tty_ldisc_flush(tty);
L
Linus Torvalds 已提交
2821
	CY_LOCK(info, flags);
2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836

	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
Linus Torvalds 已提交
2837 2838

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
2839
	printk(KERN_DEBUG "cyc:cy_close done\n");
L
Linus Torvalds 已提交
2840 2841
#endif

2842 2843
	CY_UNLOCK(info, flags);
}				/* cy_close */
L
Linus Torvalds 已提交
2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857

/* 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.
 *
 */
2858
static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
L
Linus Torvalds 已提交
2859
{
2860
	struct cyclades_port *info = tty->driver_data;
2861 2862
	unsigned long flags;
	int c, ret = 0;
L
Linus Torvalds 已提交
2863 2864

#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2865
	printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2866 2867
#endif

2868 2869 2870
	if (serial_paranoia_check(info, tty->name, "cy_write")) {
		return 0;
	}
L
Linus Torvalds 已提交
2871

2872 2873
	if (!info->xmit_buf)
		return 0;
L
Linus Torvalds 已提交
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 2899 2900
	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
Linus Torvalds 已提交
2901 2902 2903 2904 2905 2906 2907 2908

/*
 * 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.
 */
2909
static void cy_put_char(struct tty_struct *tty, unsigned char ch)
L
Linus Torvalds 已提交
2910
{
2911
	struct cyclades_port *info = tty->driver_data;
2912
	unsigned long flags;
L
Linus Torvalds 已提交
2913 2914

#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2915
	printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2916 2917
#endif

2918 2919
	if (serial_paranoia_check(info, tty->name, "cy_put_char"))
		return;
L
Linus Torvalds 已提交
2920

2921 2922
	if (!info->xmit_buf)
		return;
L
Linus Torvalds 已提交
2923

2924
	CY_LOCK(info, flags);
J
Jiri Slaby 已提交
2925
	if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2926 2927 2928
		CY_UNLOCK(info, flags);
		return;
	}
L
Linus Torvalds 已提交
2929

2930 2931 2932
	info->xmit_buf[info->xmit_head++] = ch;
	info->xmit_head &= SERIAL_XMIT_SIZE - 1;
	info->xmit_cnt++;
L
Linus Torvalds 已提交
2933 2934
	info->idle_stats.xmit_bytes++;
	info->idle_stats.xmit_idle = jiffies;
2935 2936
	CY_UNLOCK(info, flags);
}				/* cy_put_char */
L
Linus Torvalds 已提交
2937 2938 2939 2940 2941

/*
 * This routine is called by the kernel after it has written a
 * series of characters to the tty device using put_char().  
 */
2942
static void cy_flush_chars(struct tty_struct *tty)
L
Linus Torvalds 已提交
2943
{
2944
	struct cyclades_port *info = tty->driver_data;
2945

L
Linus Torvalds 已提交
2946
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2947
	printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2948 2949
#endif

2950 2951
	if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
		return;
L
Linus Torvalds 已提交
2952

2953 2954 2955
	if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
			!info->xmit_buf)
		return;
L
Linus Torvalds 已提交
2956

2957 2958
	start_xmit(info);
}				/* cy_flush_chars */
L
Linus Torvalds 已提交
2959 2960 2961 2962 2963 2964 2965

/*
 * 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.
 */
2966
static int cy_write_room(struct tty_struct *tty)
L
Linus Torvalds 已提交
2967
{
2968
	struct cyclades_port *info = tty->driver_data;
2969 2970
	int ret;

L
Linus Torvalds 已提交
2971
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2972
	printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2973 2974
#endif

2975 2976 2977 2978 2979 2980 2981
	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
Linus Torvalds 已提交
2982

2983
static int cy_chars_in_buffer(struct tty_struct *tty)
L
Linus Torvalds 已提交
2984
{
2985
	struct cyclades_port *info = tty->driver_data;
2986
	int card, channel;
L
Linus Torvalds 已提交
2987

2988 2989 2990 2991 2992
	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
Linus Torvalds 已提交
2993 2994

#ifdef Z_EXT_CHARS_IN_BUFFER
2995 2996
	if (!IS_CYC_Z(cy_card[card])) {
#endif				/* Z_EXT_CHARS_IN_BUFFER */
L
Linus Torvalds 已提交
2997
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2998 2999
		printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
			info->line, info->xmit_cnt);
L
Linus Torvalds 已提交
3000
#endif
3001
		return info->xmit_cnt;
L
Linus Torvalds 已提交
3002
#ifdef Z_EXT_CHARS_IN_BUFFER
3003
	} else {
J
Jiri Slaby 已提交
3004 3005 3006 3007
		static struct FIRM_ID *firm_id;
		static struct ZFW_CTRL *zfw_ctrl;
		static struct CH_CTRL *ch_ctrl;
		static struct BUF_CTRL *buf_ctrl;
3008
		int char_count;
J
Jiri Slaby 已提交
3009
		__u32 tx_put, tx_get, tx_bufsize;
3010 3011 3012

		firm_id = cy_card[card].base_addr + ID_ADDRESS;
		zfw_ctrl = cy_card[card].base_addr +
3013
			(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3014 3015 3016
		ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
		buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);

3017 3018 3019
		tx_get = readl(&buf_ctrl->tx_get);
		tx_put = readl(&buf_ctrl->tx_put);
		tx_bufsize = readl(&buf_ctrl->tx_bufsize);
3020 3021 3022 3023
		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
3024
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
3025 3026
		printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
			info->line, info->xmit_cnt + char_count);
L
Linus Torvalds 已提交
3027
#endif
J
Jiri Slaby 已提交
3028
		return info->xmit_cnt + char_count;
3029 3030 3031
	}
#endif				/* Z_EXT_CHARS_IN_BUFFER */
}				/* cy_chars_in_buffer */
L
Linus Torvalds 已提交
3032 3033 3034 3035 3036 3037 3038

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

K
Klaus Kudielka 已提交
3039
static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
L
Linus Torvalds 已提交
3040
{
3041
	int co, co_val, bpr;
K
Klaus Kudielka 已提交
3042
	__u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3043
			25000000);
L
Linus Torvalds 已提交
3044

3045 3046 3047 3048
	if (baud == 0) {
		info->tbpr = info->tco = info->rbpr = info->rco = 0;
		return;
	}
L
Linus Torvalds 已提交
3049

3050 3051 3052 3053 3054
	/* 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
3055

3056 3057 3058
	bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
	if (bpr > 255)
		bpr = 255;
L
Linus Torvalds 已提交
3059

3060 3061
	info->tbpr = info->rbpr = bpr;
	info->tco = info->rco = co;
L
Linus Torvalds 已提交
3062 3063 3064 3065 3066 3067
}

/*
 * This routine finds or computes the various line characteristics.
 * It used to be called config_setup
 */
3068
static void set_line_char(struct cyclades_port *info)
L
Linus Torvalds 已提交
3069
{
3070 3071 3072 3073 3074 3075 3076 3077 3078 3079
	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
3080
	}
3081 3082
	if (info->line == -1) {
		return;
L
Linus Torvalds 已提交
3083
	}
3084 3085
	cflag = info->tty->termios->c_cflag;
	iflag = info->tty->termios->c_iflag;
L
Linus Torvalds 已提交
3086

3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098
	/*
	 * 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
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 3208 3209 3210 3211

	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
3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222

	 /***********************************************
	    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.
	 ***********************************************/

3223 3224 3225 3226
		chip = channel >> 2;
		channel &= 0x03;
		base_addr = cy_card[card].base_addr +
			(cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
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 3256 3257 3258 3259
		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),
3260
				readb(base_addr + (CySRER << index)) | CyMdmCh);
3261 3262 3263 3264 3265 3266 3267 3268 3269 3270
			/* 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
3271
		} else {
3272 3273
			/* without modem intr */
			cy_writeb(base_addr + (CySRER << index),
3274
				  readb(base_addr +
3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287
					   (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
3288
		}
3289 3290 3291 3292 3293 3294 3295 3296 3297

		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
3298
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3299 3300
			printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3301 3302
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3303
#endif
3304 3305 3306 3307 3308 3309 3310 3311
		} 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
3312
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3313 3314
			printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3315 3316
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3317
#endif
3318
		}
L
Linus Torvalds 已提交
3319

3320 3321 3322 3323
		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
3324 3325

	} else {
3326 3327 3328 3329 3330
		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
3331
		__u32 sw_flow;
3332
		int retval;
L
Linus Torvalds 已提交
3333

3334 3335 3336 3337
		firm_id = cy_card[card].base_addr + ID_ADDRESS;
		if (!ISZLOADED(cy_card[card])) {
			return;
		}
L
Linus Torvalds 已提交
3338

3339
		zfw_ctrl = cy_card[card].base_addr +
3340
			(readl(&firm_id->zfwctrl_addr) & 0xfffff);
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 3369 3370 3371 3372
		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
3373

3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390
		/* 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,
3391
				  readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3392 3393
		} else {
			cy_writel(&ch_ctrl->comm_data_l,
3394
				  readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3395 3396 3397 3398 3399 3400 3401 3402 3403 3404
		}
		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
3405

3406 3407 3408
		/* CTS flow control flag */
		if (cflag & CRTSCTS) {
			cy_writel(&ch_ctrl->hw_flow,
3409
				readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3410
		} else {
3411 3412
			cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
					~(C_RS_CTS | C_RS_RTS));
3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428
		}
		/* 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) {
J
Jiri Slaby 已提交
3429 3430
			printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
				"was %x\n", info->line, retval);
3431 3432 3433 3434 3435 3436 3437 3438
		}

		/* CD sensitivity */
		if (cflag & CLOCAL) {
			info->flags &= ~ASYNC_CHECK_CD;
		} else {
			info->flags |= ASYNC_CHECK_CD;
		}
L
Linus Torvalds 已提交
3439

3440 3441
		if (baud == 0) {	/* baud rate is zero, turn off line */
			cy_writel(&ch_ctrl->rs_control,
3442
				  readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
L
Linus Torvalds 已提交
3443
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3444
			printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
L
Linus Torvalds 已提交
3445
#endif
3446 3447
		} else {
			cy_writel(&ch_ctrl->rs_control,
3448
				  readl(&ch_ctrl->rs_control) | C_RS_DTR);
L
Linus Torvalds 已提交
3449
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3450
			printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
L
Linus Torvalds 已提交
3451
#endif
3452
		}
L
Linus Torvalds 已提交
3453

3454 3455
		retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
		if (retval != 0) {
J
Jiri Slaby 已提交
3456 3457
			printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
				"was %x\n", info->line, retval);
3458
		}
L
Linus Torvalds 已提交
3459

3460 3461 3462
		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
L
Linus Torvalds 已提交
3463
	}
3464
}				/* set_line_char */
L
Linus Torvalds 已提交
3465 3466

static int
3467 3468
get_serial_info(struct cyclades_port *info,
		struct serial_struct __user * retinfo)
L
Linus Torvalds 已提交
3469
{
3470 3471
	struct serial_struct tmp;
	struct cyclades_card *cinfo = &cy_card[info->card];
L
Linus Torvalds 已提交
3472

3473 3474 3475 3476 3477 3478 3479 3480 3481
	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;
3482
	tmp.closing_wait = info->closing_wait;
3483 3484 3485 3486 3487
	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
3488 3489

static int
3490 3491
set_serial_info(struct cyclades_port *info,
		struct serial_struct __user * new_info)
L
Linus Torvalds 已提交
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 3521 3522 3523 3524
	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
3525 3526

check_and_exit:
3527 3528 3529 3530 3531 3532 3533
	if (info->flags & ASYNC_INITIALIZED) {
		set_line_char(info);
		return 0;
	} else {
		return startup(info);
	}
}				/* set_serial_info */
L
Linus Torvalds 已提交
3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544

/*
 * 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.
 */
3545
static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
L
Linus Torvalds 已提交
3546
{
3547 3548 3549 3550 3551
	int card, chip, channel, index;
	unsigned char status;
	unsigned int result;
	unsigned long flags;
	void __iomem *base_addr;
L
Linus Torvalds 已提交
3552

3553 3554 3555 3556 3557 3558 3559 3560 3561 3562
	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);
3563
		status = readb(base_addr + (CySRER << index)) &
3564 3565 3566 3567 3568 3569 3570 3571
				(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
3572 3573
}

3574
static int cy_tiocmget(struct tty_struct *tty, struct file *file)
L
Linus Torvalds 已提交
3575
{
3576
	struct cyclades_port *info = tty->driver_data;
3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589
	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
3590

3591 3592 3593 3594 3595 3596 3597 3598
	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
3599

3600 3601
		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3602 3603
		status = readb(base_addr + (CyMSVR1 << index));
		status |= readb(base_addr + (CyMSVR2 << index));
3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616
		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
3617
	} else {
3618 3619 3620 3621
		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 +
3622
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3623 3624
			board_ctrl = &zfw_ctrl->board_ctrl;
			ch_ctrl = zfw_ctrl->ch_ctrl;
3625
			lstatus = readl(&ch_ctrl[channel].rs_status);
3626 3627 3628 3629 3630 3631 3632 3633 3634 3635
			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
3636

3637 3638 3639
	}
	return result;
}				/* cy_tiomget */
L
Linus Torvalds 已提交
3640 3641 3642

static int
cy_tiocmset(struct tty_struct *tty, struct file *file,
3643
		unsigned int set, unsigned int clear)
L
Linus Torvalds 已提交
3644
{
3645
	struct cyclades_port *info = tty->driver_data;
3646 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
	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
3704
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3705 3706
			printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3707 3708
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3709
#endif
3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722
			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
3723 3724

#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3725 3726
			printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3727 3728
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3729
#endif
3730 3731 3732 3733 3734 3735 3736 3737
			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 +
3738
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3739 3740 3741 3742 3743 3744
			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,
3745 3746
					readl(&ch_ctrl[channel].rs_control) |
					C_RS_RTS);
3747 3748 3749 3750 3751
				CY_UNLOCK(info, flags);
			}
			if (clear & TIOCM_RTS) {
				CY_LOCK(info, flags);
				cy_writel(&ch_ctrl[channel].rs_control,
3752 3753
					readl(&ch_ctrl[channel].rs_control) &
					~C_RS_RTS);
3754 3755 3756 3757 3758
				CY_UNLOCK(info, flags);
			}
			if (set & TIOCM_DTR) {
				CY_LOCK(info, flags);
				cy_writel(&ch_ctrl[channel].rs_control,
3759 3760
					readl(&ch_ctrl[channel].rs_control) |
					C_RS_DTR);
L
Linus Torvalds 已提交
3761
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3762 3763
				printk(KERN_DEBUG "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
J
Jiri Slaby 已提交
3773 3774
				printk(KERN_DEBUG "cyc:set_modem_info clearing "
					"Z DTR\n");
L
Linus Torvalds 已提交
3775
#endif
3776 3777 3778 3779 3780 3781 3782 3783 3784
				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) {
J
Jiri Slaby 已提交
3785 3786
			printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
				"was %x\n", info->line, retval);
3787 3788
		}
		CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
3789
	}
3790 3791
	return 0;
}				/* cy_tiocmset */
L
Linus Torvalds 已提交
3792 3793 3794 3795

/*
 * cy_break() --- routine which turns the break handling on or off
 */
3796
static void cy_break(struct tty_struct *tty, int break_state)
L
Linus Torvalds 已提交
3797
{
3798
	struct cyclades_port *info = tty->driver_data;
3799
	unsigned long flags;
L
Linus Torvalds 已提交
3800

3801 3802
	if (serial_paranoia_check(info, tty->name, "cy_break"))
		return;
L
Linus Torvalds 已提交
3803

3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826
	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
3827 3828
		}
	} else {
3829 3830 3831 3832 3833 3834 3835
		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) {
J
Jiri Slaby 已提交
3836 3837
				printk(KERN_ERR "cyc:cy_break (set) retval on "
					"ttyC%d was %x\n", info->line, retval);
3838 3839 3840 3841 3842 3843
			}
		} 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) {
J
Jiri Slaby 已提交
3844 3845 3846
				printk(KERN_DEBUG "cyc:cy_break (clr) retval "
					"on ttyC%d was %x\n", info->line,
					retval);
3847
			}
L
Linus Torvalds 已提交
3848 3849
		}
	}
3850 3851
	CY_UNLOCK(info, flags);
}				/* cy_break */
L
Linus Torvalds 已提交
3852 3853

static int
3854
get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
L
Linus Torvalds 已提交
3855 3856
{

3857 3858 3859 3860 3861 3862 3863 3864
	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
3865

3866
static int set_threshold(struct cyclades_port *info, unsigned long value)
L
Linus Torvalds 已提交
3867
{
3868 3869 3870
	void __iomem *base_addr;
	int card, channel, chip, index;
	unsigned long flags;
L
Linus Torvalds 已提交
3871

3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882
	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
3883

3884 3885 3886 3887 3888
		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
3889
		/* Nothing to do! */
3890 3891 3892
	}
	return 0;
}				/* set_threshold */
L
Linus Torvalds 已提交
3893 3894

static int
3895
get_threshold(struct cyclades_port *info, unsigned long __user * value)
L
Linus Torvalds 已提交
3896
{
3897 3898 3899
	void __iomem *base_addr;
	int card, channel, chip, index;
	unsigned long tmp;
L
Linus Torvalds 已提交
3900

3901 3902 3903 3904 3905 3906 3907 3908 3909
	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);

3910
		tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3911 3912
		return put_user(tmp, value);
	} else {
J
Jiri Slaby 已提交
3913
		/* Nothing to do! */
3914 3915 3916
		return 0;
	}
}				/* get_threshold */
L
Linus Torvalds 已提交
3917 3918

static int
3919
set_default_threshold(struct cyclades_port *info, unsigned long value)
L
Linus Torvalds 已提交
3920
{
3921 3922 3923
	info->default_threshold = value & 0x0f;
	return 0;
}				/* set_default_threshold */
L
Linus Torvalds 已提交
3924 3925

static int
3926
get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
L
Linus Torvalds 已提交
3927
{
3928 3929
	return put_user(info->default_threshold, value);
}				/* get_default_threshold */
L
Linus Torvalds 已提交
3930

3931
static int set_timeout(struct cyclades_port *info, unsigned long value)
L
Linus Torvalds 已提交
3932
{
3933 3934 3935
	void __iomem *base_addr;
	int card, channel, chip, index;
	unsigned long flags;
L
Linus Torvalds 已提交
3936

3937 3938 3939 3940 3941 3942 3943 3944
	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
3945

3946 3947 3948 3949
		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
		CY_UNLOCK(info, flags);
	} else {
J
Jiri Slaby 已提交
3950
		/* Nothing to do! */
3951 3952 3953
	}
	return 0;
}				/* set_timeout */
L
Linus Torvalds 已提交
3954

3955
static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
L
Linus Torvalds 已提交
3956
{
3957 3958 3959
	void __iomem *base_addr;
	int card, channel, chip, index;
	unsigned long tmp;
L
Linus Torvalds 已提交
3960

3961 3962 3963 3964 3965 3966 3967 3968 3969
	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);

3970
		tmp = readb(base_addr + (CyRTPR << index));
3971 3972
		return put_user(tmp, value);
	} else {
J
Jiri Slaby 已提交
3973
		/* Nothing to do! */
3974 3975 3976
		return 0;
	}
}				/* get_timeout */
L
Linus Torvalds 已提交
3977

3978
static int set_default_timeout(struct cyclades_port *info, unsigned long value)
L
Linus Torvalds 已提交
3979
{
3980 3981 3982
	info->default_timeout = value & 0xff;
	return 0;
}				/* set_default_timeout */
L
Linus Torvalds 已提交
3983 3984

static int
3985
get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
L
Linus Torvalds 已提交
3986
{
3987 3988
	return put_user(info->default_timeout, value);
}				/* get_default_timeout */
L
Linus Torvalds 已提交
3989 3990 3991 3992 3993 3994 3995

/*
 * 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
3996 3997
cy_ioctl(struct tty_struct *tty, struct file *file,
	 unsigned int cmd, unsigned long arg)
L
Linus Torvalds 已提交
3998
{
3999
	struct cyclades_port *info = tty->driver_data;
4000 4001 4002 4003 4004 4005 4006 4007
	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
4008 4009

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4010 4011
	printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
		info->line, cmd, arg);
L
Linus Torvalds 已提交
4012 4013
#endif

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 4039 4040 4041
	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
4042
	case CYSETRFLOW:
4043 4044 4045
		info->rflow = (int)arg;
		ret_val = 0;
		break;
L
Linus Torvalds 已提交
4046
	case CYGETRFLOW:
4047 4048
		ret_val = info->rflow;
		break;
L
Linus Torvalds 已提交
4049
	case CYSETRTSDTR_INV:
4050 4051 4052
		info->rtsdtr_inv = (int)arg;
		ret_val = 0;
		break;
L
Linus Torvalds 已提交
4053
	case CYGETRTSDTR_INV:
4054 4055
		ret_val = info->rtsdtr_inv;
		break;
L
Linus Torvalds 已提交
4056
	case CYGETCD1400VER:
4057 4058
		ret_val = info->chip_rev;
		break;
L
Linus Torvalds 已提交
4059 4060
#ifndef CONFIG_CYZ_INTR
	case CYZSETPOLLCYCLE:
4061 4062 4063
		cyz_polling_cycle = (arg * HZ) / 1000;
		ret_val = 0;
		break;
L
Linus Torvalds 已提交
4064
	case CYZGETPOLLCYCLE:
4065 4066 4067
		ret_val = (cyz_polling_cycle * 1000) / HZ;
		break;
#endif				/* CONFIG_CYZ_INTR */
L
Linus Torvalds 已提交
4068
	case CYSETWAIT:
4069 4070 4071
		info->closing_wait = (unsigned short)arg *HZ / 100;
		ret_val = 0;
		break;
L
Linus Torvalds 已提交
4072
	case CYGETWAIT:
4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089
		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
4090 4091
	case TIOCMIWAIT:
		CY_LOCK(info, flags);
4092 4093
		/* note the counters on entry */
		cprev = info->icount;
L
Linus Torvalds 已提交
4094
		CY_UNLOCK(info, flags);
4095 4096 4097 4098 4099 4100
		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
4101

4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116
			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
4117
		}
4118
		/* NOTREACHED */
L
Linus Torvalds 已提交
4119

4120 4121 4122 4123 4124 4125
		/*
		 * 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
4126
	case TIOCGICOUNT:
4127 4128 4129 4130 4131 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
		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
4169 4170

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4171
	printk(KERN_DEBUG "cyc:cy_ioctl done\n");
L
Linus Torvalds 已提交
4172 4173
#endif

4174 4175
	return ret_val;
}				/* cy_ioctl */
L
Linus Torvalds 已提交
4176 4177 4178 4179 4180 4181 4182

/*
 * 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.
 */
4183
static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
L
Linus Torvalds 已提交
4184
{
4185
	struct cyclades_port *info = tty->driver_data;
L
Linus Torvalds 已提交
4186 4187

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4188
	printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4189 4190
#endif

4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201
	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
4202
#if 0
4203 4204 4205 4206 4207 4208 4209 4210 4211
	/*
	 * 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
4212
#endif
4213
}				/* cy_set_termios */
L
Linus Torvalds 已提交
4214 4215 4216 4217

/* This function is used to send a high-priority XON/XOFF character to
   the device.
*/
4218
static void cy_send_xchar(struct tty_struct *tty, char ch)
L
Linus Torvalds 已提交
4219
{
4220
	struct cyclades_port *info = tty->driver_data;
L
Linus Torvalds 已提交
4221 4222
	int card, channel;

4223
	if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
L
Linus Torvalds 已提交
4224 4225
		return;

4226
	info->x_char = ch;
L
Linus Torvalds 已提交
4227 4228

	if (ch)
4229
		cy_start(tty);
L
Linus Torvalds 已提交
4230 4231 4232 4233

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

4234 4235 4236 4237 4238 4239 4240
	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
4241 4242 4243 4244 4245 4246 4247
	}
}

/* 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.
 */
4248
static void cy_throttle(struct tty_struct *tty)
L
Linus Torvalds 已提交
4249
{
4250
	struct cyclades_port *info = tty->driver_data;
4251 4252 4253
	unsigned long flags;
	void __iomem *base_addr;
	int card, chip, channel, index;
L
Linus Torvalds 已提交
4254 4255

#ifdef CY_DEBUG_THROTTLE
4256
	char buf[64];
L
Linus Torvalds 已提交
4257

J
Jiri Slaby 已提交
4258
	printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4259
			tty->ldisc.chars_in_buffer(tty), info->line);
L
Linus Torvalds 已提交
4260 4261
#endif

4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273
	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
4274

4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299
	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
4300 4301 4302 4303 4304 4305

/*
 * 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.
 */
4306
static void cy_unthrottle(struct tty_struct *tty)
L
Linus Torvalds 已提交
4307
{
4308
	struct cyclades_port *info = tty->driver_data;
4309 4310 4311
	unsigned long flags;
	void __iomem *base_addr;
	int card, chip, channel, index;
L
Linus Torvalds 已提交
4312 4313

#ifdef CY_DEBUG_THROTTLE
4314 4315
	char buf[64];

J
Jiri Slaby 已提交
4316 4317
	printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
		tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
L
Linus Torvalds 已提交
4318 4319
#endif

4320 4321 4322
	if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
		return;
	}
L
Linus Torvalds 已提交
4323

4324 4325 4326 4327 4328
	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
4329 4330
	}

4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356
	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
4357 4358 4359 4360

/* cy_start and cy_stop provide software output flow control as a
   function of XON/XOFF, software CTS, and other such stuff.
*/
4361
static void cy_stop(struct tty_struct *tty)
L
Linus Torvalds 已提交
4362
{
4363
	struct cyclades_card *cinfo;
4364
	struct cyclades_port *info = tty->driver_data;
4365 4366 4367
	void __iomem *base_addr;
	int chip, channel, index;
	unsigned long flags;
L
Linus Torvalds 已提交
4368 4369

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4370
	printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4371 4372
#endif

4373 4374
	if (serial_paranoia_check(info, tty->name, "cy_stop"))
		return;
L
Linus Torvalds 已提交
4375

4376 4377 4378 4379 4380 4381 4382 4383
	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
4384

4385 4386 4387 4388
		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index),
			(u_char)(channel & 0x0003)); /* index channel */
		cy_writeb(base_addr + (CySRER << index),
4389
			  readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4390 4391
		CY_UNLOCK(info, flags);
	} else {
J
Jiri Slaby 已提交
4392
		/* Nothing to do! */
4393 4394
	}
}				/* cy_stop */
L
Linus Torvalds 已提交
4395

4396
static void cy_start(struct tty_struct *tty)
L
Linus Torvalds 已提交
4397
{
4398
	struct cyclades_card *cinfo;
4399
	struct cyclades_port *info = tty->driver_data;
4400 4401 4402
	void __iomem *base_addr;
	int chip, channel, index;
	unsigned long flags;
L
Linus Torvalds 已提交
4403 4404

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4405
	printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4406 4407
#endif

4408 4409
	if (serial_paranoia_check(info, tty->name, "cy_start"))
		return;
L
Linus Torvalds 已提交
4410

4411 4412 4413 4414 4415 4416 4417 4418
	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
4419

4420 4421 4422
		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003));	/* index channel */
		cy_writeb(base_addr + (CySRER << index),
4423
			  readb(base_addr + (CySRER << index)) | CyTxRdy);
4424 4425
		CY_UNLOCK(info, flags);
	} else {
J
Jiri Slaby 已提交
4426
		/* Nothing to do! */
4427 4428
	}
}				/* cy_start */
L
Linus Torvalds 已提交
4429

4430
static void cy_flush_buffer(struct tty_struct *tty)
L
Linus Torvalds 已提交
4431
{
4432
	struct cyclades_port *info = tty->driver_data;
4433 4434 4435
	int card, channel, retval;
	unsigned long flags;

L
Linus Torvalds 已提交
4436
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
4437
	printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4438 4439
#endif

4440 4441
	if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
		return;
L
Linus Torvalds 已提交
4442

4443 4444
	card = info->card;
	channel = (info->line) - (cy_card[card].first_line);
L
Linus Torvalds 已提交
4445 4446

	CY_LOCK(info, flags);
4447
	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
L
Linus Torvalds 已提交
4448 4449
	CY_UNLOCK(info, flags);

4450 4451 4452 4453 4454 4455
	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) {
J
Jiri Slaby 已提交
4456 4457
			printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
				"was %x\n", info->line, retval);
4458 4459 4460 4461 4462
		}
		CY_UNLOCK(info, flags);
	}
	tty_wakeup(tty);
}				/* cy_flush_buffer */
L
Linus Torvalds 已提交
4463 4464 4465 4466

/*
 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
 */
4467
static void cy_hangup(struct tty_struct *tty)
L
Linus Torvalds 已提交
4468
{
4469
	struct cyclades_port *info = tty->driver_data;
4470

L
Linus Torvalds 已提交
4471
#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4472
	printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4473 4474
#endif

4475 4476
	if (serial_paranoia_check(info, tty->name, "cy_hangup"))
		return;
L
Linus Torvalds 已提交
4477

4478 4479 4480 4481
	cy_flush_buffer(tty);
	shutdown(info);
	info->event = 0;
	info->count = 0;
L
Linus Torvalds 已提交
4482
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
4483 4484
	printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
		current->pid);
L
Linus Torvalds 已提交
4485
#endif
4486 4487 4488 4489
	info->tty = NULL;
	info->flags &= ~ASYNC_NORMAL_ACTIVE;
	wake_up_interruptible(&info->open_wait);
}				/* cy_hangup */
L
Linus Torvalds 已提交
4490 4491 4492 4493 4494 4495 4496 4497 4498

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

4499 4500 4501 4502 4503 4504 4505 4506 4507
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;

J
Jiri Slaby 已提交
4508
	if (IS_CYC_Z(*cinfo)) {	/* Cyclades-Z */
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
		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
J
Jiri Slaby 已提交
4577
			printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
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
#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 */
		}
	}
}

L
Linus Torvalds 已提交
4652 4653 4654
/* initialize chips on Cyclom-Y card -- return number of valid
   chips (which is number of ports/4) */
static unsigned short __init
4655
cyy_init_card(void __iomem * true_base_addr, int index)
L
Linus Torvalds 已提交
4656
{
4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669
	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);
4670
		if (readb(base_addr + (CyCCR << index)) != 0x00) {
4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686
			/*************
			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.
		 */
4687
		if (chip_number == 4 && readb(true_base_addr +
4688 4689 4690 4691 4692 4693 4694 4695
				(cy_chip_offset[0] << index) +
				(CyGFRCR << index)) == 0) {
			return chip_number;
		}

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

4696
		if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4697 4698 4699 4700 4701 4702 4703
			/*
			   printk(" chip #%d at %#6lx is not responding ",
			   chip_number, (unsigned long)base_addr);
			   printk("(GFRCR stayed 0)\n",
			 */
			return chip_number;
		}
4704
		if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4705 4706 4707 4708 4709 4710 4711 4712 4713 4714
				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);
4715
		if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4716 4717 4718 4719 4720 4721 4722 4723
			/* 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
4724

4725 4726 4727
		/*
		   printk(" chip #%d at %#6lx is rev 0x%2x\n",
		   chip_number, (unsigned long)base_addr,
4728
		   readb(base_addr+(CyGFRCR<<index)));
4729 4730 4731 4732
		 */
	}
	return chip_number;
}				/* cyy_init_card */
L
Linus Torvalds 已提交
4733 4734 4735 4736 4737 4738 4739

/*
 * ---------------------------------------------------------------------
 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
 * sets global variables and return the number of ISA boards found.
 * ---------------------------------------------------------------------
 */
4740
static int __init cy_detect_isa(void)
L
Linus Torvalds 已提交
4741 4742
{
#ifdef CONFIG_ISA
4743 4744 4745
	unsigned short cy_isa_irq, nboard;
	void __iomem *cy_isa_address;
	unsigned short i, j, cy_isa_nchan;
L
Linus Torvalds 已提交
4746
#ifdef MODULE
4747
	int isparam = 0;
L
Linus Torvalds 已提交
4748 4749
#endif

4750
	nboard = 0;
L
Linus Torvalds 已提交
4751 4752 4753

#ifdef MODULE
	/* Check for module parameters */
4754 4755 4756 4757 4758 4759 4760
	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
4761 4762 4763
	}
#endif

4764 4765 4766 4767
	/* 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
4768
			return nboard;
4769
		}
L
Linus Torvalds 已提交
4770

4771
		/* probe for CD1400... */
L
Linus Torvalds 已提交
4772
		cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4773 4774 4775 4776 4777
		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
4778 4779
#ifdef MODULE
		if (isparam && irq[i])
4780
			cy_isa_irq = irq[i];
L
Linus Torvalds 已提交
4781 4782
		else
#endif
4783 4784 4785
			/* find out the board's irq by probing */
			cy_isa_irq = detect_isa_irq(cy_isa_address);
		if (cy_isa_irq == 0) {
J
Jiri Slaby 已提交
4786 4787
			printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
				"IRQ could not be detected.\n",
4788 4789 4790 4791 4792
				(unsigned long)cy_isa_address);
			continue;
		}

		if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
J
Jiri Slaby 已提交
4793 4794 4795
			printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
				"more channels are available. Change NR_PORTS "
				"in cyclades.c and recompile kernel.\n",
4796
				(unsigned long)cy_isa_address);
J
Jiri Slaby 已提交
4797
			return nboard;
4798 4799 4800 4801 4802 4803 4804
		}
		/* 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 */
J
Jiri Slaby 已提交
4805 4806 4807
			printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
				"more cards can be used. Change NR_CARDS in "
				"cyclades.c and recompile kernel.\n",
4808
				(unsigned long)cy_isa_address);
J
Jiri Slaby 已提交
4809
			return nboard;
4810 4811 4812 4813 4814
		}

		/* allocate IRQ */
		if (request_irq(cy_isa_irq, cyy_interrupt,
				IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
J
Jiri Slaby 已提交
4815 4816 4817
			printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
				"could not allocate IRQ#%d.\n",
				(unsigned long)cy_isa_address, cy_isa_irq);
J
Jiri Slaby 已提交
4818
			return nboard;
4819 4820 4821 4822 4823 4824 4825 4826 4827
		}

		/* 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;
4828
		cy_init_card(&cy_card[j], j);
4829 4830
		nboard++;

J
Jiri Slaby 已提交
4831 4832
		printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
			"%d channels starting from port %d\n",
4833 4834
			j + 1, (unsigned long)cy_isa_address,
			(unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
J
Jiri Slaby 已提交
4835 4836
			cy_isa_irq, cy_isa_nchan, cy_next_channel);

4837 4838 4839
		for (j = cy_next_channel;
				j < cy_next_channel + cy_isa_nchan; j++)
			tty_register_device(cy_serial_driver, j, NULL);
4840 4841
		cy_next_channel += cy_isa_nchan;
	}
J
Jiri Slaby 已提交
4842
	return nboard;
L
Linus Torvalds 已提交
4843
#else
J
Jiri Slaby 已提交
4844
	return 0;
4845 4846
#endif				/* CONFIG_ISA */
}				/* cy_detect_isa */
L
Linus Torvalds 已提交
4847

J
Jiri Slaby 已提交
4848 4849
#ifdef CONFIG_PCI
static void __devinit plx_init(void __iomem * addr, __u32 initctl)
L
Linus Torvalds 已提交
4850
{
4851
	/* Reset PLX */
4852
	cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
4853
	udelay(100L);
4854
	cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
4855 4856

	/* Reload Config. Registers from EEPROM */
4857
	cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
4858
	udelay(100L);
4859
	cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
L
Linus Torvalds 已提交
4860 4861
}

J
Jiri Slaby 已提交
4862 4863 4864
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
4865
		int cy_pci_irq, struct pci_dev *pdev)
J
Jiri Slaby 已提交
4866
{
J
Jiri Slaby 已提交
4867
	void __iomem *cy_pci_addr2;
J
Jiri Slaby 已提交
4868 4869 4870
	unsigned int j;
	unsigned short cy_pci_nchan;

J
Jiri Slaby 已提交
4871 4872
	cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ze_win);

J
Jiri Slaby 已提交
4873
	readl(&cy_pci_addr0->mail_box_0);
J
Jiri Slaby 已提交
4874 4875
	dev_dbg(&pdev->dev, "new Cyclades-Z board.  FPGA not loaded\n");

J
Jiri Slaby 已提交
4876 4877 4878 4879
	/* This must be the new Cyclades-Ze/PCI. */
	cy_pci_nchan = ZE_V1_NPORTS;

	if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
J
Jiri Slaby 已提交
4880
		dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no channels "
J
Jiri Slaby 已提交
4881
			"are available.\nChange NR_PORTS in cyclades.c "
J
Jiri Slaby 已提交
4882
			"and recompile kernel.\n");
J
Jiri Slaby 已提交
4883 4884 4885 4886 4887 4888 4889 4890 4891
		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 */
J
Jiri Slaby 已提交
4892
		dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no more "
J
Jiri Slaby 已提交
4893
			"cards can be used.\nChange NR_CARDS in "
J
Jiri Slaby 已提交
4894
			"cyclades.c and recompile kernel.\n");
J
Jiri Slaby 已提交
4895 4896 4897 4898 4899 4900 4901 4902
		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])) {
J
Jiri Slaby 已提交
4903
			dev_err(&pdev->dev, "could not allocate IRQ.\n");
J
Jiri Slaby 已提交
4904 4905 4906 4907 4908 4909 4910 4911
			return -EIO;
		}
	}
#endif				/* CONFIG_CYZ_INTR */

	/* set cy_card */
	cy_card[j].base_addr = cy_pci_addr2;
	cy_card[j].ctl_addr = cy_pci_addr0;
J
Jiri Slaby 已提交
4912
	cy_card[j].irq = cy_pci_irq;
J
Jiri Slaby 已提交
4913 4914 4915
	cy_card[j].bus_index = 1;
	cy_card[j].first_line = cy_next_channel;
	cy_card[j].num_chips = -1;
4916
	cy_init_card(&cy_card[j], j);
J
Jiri Slaby 已提交
4917
	pci_set_drvdata(pdev, &cy_card[j]);
J
Jiri Slaby 已提交
4918

J
Jiri Slaby 已提交
4919 4920
	dev_info(&pdev->dev, "Cyclades-Ze/PCI #%d found: %d channels starting "
		"from port %d.\n", j + 1, cy_pci_nchan, cy_next_channel);
J
Jiri Slaby 已提交
4921

4922 4923
	for (j = cy_next_channel; j < cy_next_channel + cy_pci_nchan; j++)
		tty_register_device(cy_serial_driver, j, &pdev->dev);
J
Jiri Slaby 已提交
4924 4925 4926 4927 4928
	cy_next_channel += cy_pci_nchan;

	return 0;
}

J
Jiri Slaby 已提交
4929 4930
static int __devinit cy_pci_probe(struct pci_dev *pdev,
		const struct pci_device_id *ent)
L
Linus Torvalds 已提交
4931
{
4932
	unsigned char cyy_rev_id;
J
Jiri Slaby 已提交
4933
	int cy_pci_irq;
J
Jiri Slaby 已提交
4934
	__u32 cy_pci_phys0, cy_pci_phys2, mailbox;
4935
	void __iomem *cy_pci_addr0, *cy_pci_addr2;
J
Jiri Slaby 已提交
4936 4937
	unsigned int device_id;
	unsigned short j, cy_pci_nchan, plx_ver;
J
Jiri Slaby 已提交
4938
	int retval;
4939

J
Jiri Slaby 已提交
4940 4941 4942 4943 4944
	retval = pci_enable_device(pdev);
	if (retval) {
		dev_err(&pdev->dev, "cannot enable device\n");
		return retval;
	}
L
Linus Torvalds 已提交
4945

J
Jiri Slaby 已提交
4946 4947 4948 4949 4950
	/* 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
4951

J
Jiri Slaby 已提交
4952
	device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
L
Linus Torvalds 已提交
4953

J
Jiri Slaby 已提交
4954 4955
	if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
			device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
J
Jiri Slaby 已提交
4956
		dev_dbg(&pdev->dev, "Cyclom-Y/PCI found\n");
L
Linus Torvalds 已提交
4957

J
Jiri Slaby 已提交
4958
		if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
J
Jiri Slaby 已提交
4959
			dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
J
Jiri Slaby 已提交
4960 4961 4962
				"set. Ignoring it...\n");
			pdev->resource[2].flags &= ~IORESOURCE_IO;
		}
L
Linus Torvalds 已提交
4963

J
Jiri Slaby 已提交
4964 4965 4966 4967 4968
		/* 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) {
J
Jiri Slaby 已提交
4969
			dev_err(&pdev->dev, "failed to reserve resources\n");
J
Jiri Slaby 已提交
4970 4971 4972 4973
			return retval;
		}
#if defined(__alpha__)
		if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {	/* below 1M? */
J
Jiri Slaby 已提交
4974 4975
			dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for "
				"low addresses on Alpha systems.\n");
J
Jiri Slaby 已提交
4976 4977
			return -EIO;
		}
L
Linus Torvalds 已提交
4978
#endif
J
Jiri Slaby 已提交
4979 4980
		cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
		cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
L
Linus Torvalds 已提交
4981

J
Jiri Slaby 已提交
4982 4983 4984
		dev_dbg(&pdev->dev, "Cyclom-Y/PCI: relocate winaddr=0x%p "
			"ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);

J
Jiri Slaby 已提交
4985 4986 4987
		cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
				cyy_init_card(cy_pci_addr2, 1));
		if (cy_pci_nchan == 0) {
J
Jiri Slaby 已提交
4988 4989
			dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
					"Serial-Modules\n");
J
Jiri Slaby 已提交
4990 4991 4992
			return -EIO;
		}
		if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
J
Jiri Slaby 已提交
4993 4994 4995
			dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no "
				"channels are available. Change NR_PORTS in "
				"cyclades.c and recompile kernel.\n");
J
Jiri Slaby 已提交
4996 4997 4998 4999 5000
			return -EIO;
		}
		/* fill the next cy_card structure available */
		for (j = 0; j < NR_CARDS; j++) {
			if (cy_card[j].base_addr == 0)
5001
				break;
J
Jiri Slaby 已提交
5002 5003
		}
		if (j == NR_CARDS) {	/* no more cy_cards available */
J
Jiri Slaby 已提交
5004 5005 5006
			dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no more "
				"cards can be used. Change NR_CARDS in "
				"cyclades.c and recompile kernel.\n");
J
Jiri Slaby 已提交
5007 5008
			return -EIO;
		}
5009

J
Jiri Slaby 已提交
5010 5011 5012 5013
		/* allocate IRQ */
		retval = request_irq(cy_pci_irq, cyy_interrupt,
				IRQF_SHARED, "Cyclom-Y", &cy_card[j]);
		if (retval) {
J
Jiri Slaby 已提交
5014
			dev_err(&pdev->dev, "could not allocate IRQ\n");
J
Jiri Slaby 已提交
5015 5016
			return retval;
		}
5017

J
Jiri Slaby 已提交
5018 5019 5020
		/* set cy_card */
		cy_card[j].base_addr = cy_pci_addr2;
		cy_card[j].ctl_addr = cy_pci_addr0;
J
Jiri Slaby 已提交
5021
		cy_card[j].irq = cy_pci_irq;
J
Jiri Slaby 已提交
5022 5023 5024
		cy_card[j].bus_index = 1;
		cy_card[j].first_line = cy_next_channel;
		cy_card[j].num_chips = cy_pci_nchan / 4;
5025
		cy_init_card(&cy_card[j], j);
J
Jiri Slaby 已提交
5026
		pci_set_drvdata(pdev, &cy_card[j]);
5027

J
Jiri Slaby 已提交
5028 5029 5030 5031 5032 5033
		/* 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);
5034 5035
			break;

J
Jiri Slaby 已提交
5036 5037 5038
		case PLX_9060:
		case PLX_9080:
		default:	/* Old boards, use PLX_9060 */
5039 5040

			plx_init(cy_pci_addr0, 0x6c);
J
Jiri Slaby 已提交
5041 5042 5043 5044 5045
		/* 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. */
5046
			pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
J
Jiri Slaby 已提交
5047
					cy_pci_irq);
5048

J
Jiri Slaby 已提交
5049 5050 5051 5052
			cy_writew(cy_pci_addr0 + 0x68,
				readw(cy_pci_addr0 + 0x68) | 0x0900);
			break;
		}
5053

J
Jiri Slaby 已提交
5054 5055 5056 5057
		dev_info(&pdev->dev, "Cyclom-Y/PCI #%d found: %d channels "
			"starting from port %d.\n", j + 1, cy_pci_nchan,
			cy_next_channel);

5058 5059 5060
		for (j = cy_next_channel;
				j < cy_next_channel + cy_pci_nchan; j++)
			tty_register_device(cy_serial_driver, j, &pdev->dev);
L
Linus Torvalds 已提交
5061

J
Jiri Slaby 已提交
5062 5063
		cy_next_channel += cy_pci_nchan;
	} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
J
Jiri Slaby 已提交
5064 5065
		dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for "
			"low addresses\n");
J
Jiri Slaby 已提交
5066 5067
		return -EIO;
	} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
J
Jiri Slaby 已提交
5068 5069
		dev_dbg(&pdev->dev, "Cyclades-Z/PCI found\n");

J
Jiri Slaby 已提交
5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081
		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. */
J
Jiri Slaby 已提交
5082
		pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
5083

J
Jiri Slaby 已提交
5084 5085 5086 5087
		mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
				cy_pci_addr0)->mail_box_0);

		if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
J
Jiri Slaby 已提交
5088
			dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
J
Jiri Slaby 已提交
5089 5090 5091 5092 5093 5094 5095 5096 5097
				"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) {
J
Jiri Slaby 已提交
5098
			dev_err(&pdev->dev, "failed to reserve resources\n");
J
Jiri Slaby 已提交
5099 5100 5101 5102 5103 5104 5105 5106 5107 5108
			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
5109

J
Jiri Slaby 已提交
5110 5111
		dev_dbg(&pdev->dev, "Cyclades-Z/PCI: relocate winaddr=0x%p "
			"ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
L
Linus Torvalds 已提交
5112
#ifdef CY_PCI_DEBUG
J
Jiri Slaby 已提交
5113 5114 5115 5116
		if (mailbox == ZO_V1) {
			cy_writel(&((struct RUNTIME_9060 *)
				(cy_pci_addr0))->loc_addr_base,
				WIN_CREG);
J
Jiri Slaby 已提交
5117 5118
			dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA id %lx, "
				"ver %lx\n", (ulong)(0xff &
J
Jiri Slaby 已提交
5119
				readl(&((struct CUSTOM_REG *)
J
Jiri Slaby 已提交
5120 5121 5122
					cy_pci_addr2)->fpga_id)),
				(ulong)(0xff & readl(&((struct CUSTOM_REG *)
					cy_pci_addr2)->fpga_version)));
J
Jiri Slaby 已提交
5123
			cy_writel(&((struct RUNTIME_9060 *)
J
Jiri Slaby 已提交
5124
				cy_pci_addr0)->loc_addr_base, WIN_RAM);
J
Jiri Slaby 已提交
5125
		} else {
J
Jiri Slaby 已提交
5126 5127
			dev_info(&pdev->dev, "Cyclades-Z/PCI: New Cyclades-Z "
				"board.  FPGA not loaded\n");
J
Jiri Slaby 已提交
5128
		}
L
Linus Torvalds 已提交
5129
#endif
J
Jiri Slaby 已提交
5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142
		/* 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) {
J
Jiri Slaby 已提交
5143 5144 5145
			dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
				"channels are available. Change NR_PORTS in "
				"cyclades.c and recompile kernel.\n");
J
Jiri Slaby 已提交
5146 5147
			return -EIO;
		}
L
Linus Torvalds 已提交
5148

J
Jiri Slaby 已提交
5149 5150 5151 5152 5153 5154
		/* 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 */
J
Jiri Slaby 已提交
5155 5156 5157
			dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
				"more cards can be used. Change NR_CARDS in "
				"cyclades.c and recompile kernel.\n");
J
Jiri Slaby 已提交
5158 5159
			return -EIO;
		}
5160
#ifdef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5161 5162 5163 5164 5165 5166
		/* 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) {
J
Jiri Slaby 已提交
5167
				dev_err(&pdev->dev, "could not allocate IRQ\n");
J
Jiri Slaby 已提交
5168
				return retval;
5169
			}
J
Jiri Slaby 已提交
5170
		}
5171 5172
#endif				/* CONFIG_CYZ_INTR */

J
Jiri Slaby 已提交
5173 5174 5175
		/* set cy_card */
		cy_card[j].base_addr = cy_pci_addr2;
		cy_card[j].ctl_addr = cy_pci_addr0;
J
Jiri Slaby 已提交
5176
		cy_card[j].irq = cy_pci_irq;
J
Jiri Slaby 已提交
5177 5178 5179
		cy_card[j].bus_index = 1;
		cy_card[j].first_line = cy_next_channel;
		cy_card[j].num_chips = -1;
5180
		cy_init_card(&cy_card[j], j);
J
Jiri Slaby 已提交
5181 5182
		pci_set_drvdata(pdev, &cy_card[j]);

J
Jiri Slaby 已提交
5183 5184 5185
		dev_info(&pdev->dev, "Cyclades-8Zo/PCI #%d found: %d channels "
			"starting from port %d.\n", j + 1, cy_pci_nchan,
			cy_next_channel);
J
Jiri Slaby 已提交
5186

5187 5188 5189
		for (j = cy_next_channel;
				j < cy_next_channel + cy_pci_nchan; j++)
			tty_register_device(cy_serial_driver, j, &pdev->dev);
J
Jiri Slaby 已提交
5190 5191 5192 5193 5194 5195
		cy_next_channel += cy_pci_nchan;
	}

	return 0;
}

5196
static void __devexit cy_pci_remove(struct pci_dev *pdev)
J
Jiri Slaby 已提交
5197
{
J
Jiri Slaby 已提交
5198
	struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5199
	unsigned int i;
J
Jiri Slaby 已提交
5200

5201
	/* non-Z with old PLX */
J
Jiri Slaby 已提交
5202 5203
	if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
			PLX_9050)
5204 5205 5206
		cy_writeb(cinfo->ctl_addr + 0x4c, 0);
	else
#ifndef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5207
		if (!IS_CYC_Z(*cinfo))
5208 5209 5210 5211
#endif
		cy_writew(cinfo->ctl_addr + 0x68,
				readw(cinfo->ctl_addr + 0x68) & ~0x0900);

J
Jiri Slaby 已提交
5212 5213 5214 5215 5216
	pci_iounmap(pdev, cinfo->base_addr);
	if (cinfo->ctl_addr)
		pci_iounmap(pdev, cinfo->ctl_addr);
	if (cinfo->irq
#ifndef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5217
		&& !IS_CYC_Z(*cinfo)
J
Jiri Slaby 已提交
5218 5219 5220 5221 5222 5223
#endif /* CONFIG_CYZ_INTR */
		)
		free_irq(cinfo->irq, cinfo);
	pci_release_regions(pdev);

	cinfo->base_addr = NULL;
5224 5225 5226 5227
	for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
		cy_port[i].line = -1;
		cy_port[i].magic = -1;
	}
5228 5229 5230
	for (i = cinfo->first_line; i < cinfo->first_line +
			cinfo->nports; i++)
		tty_unregister_device(cy_serial_driver, i);
J
Jiri Slaby 已提交
5231 5232
}

5233 5234 5235 5236 5237 5238 5239 5240
static struct pci_driver cy_pci_driver = {
	.name = "cyclades",
	.id_table = cy_pci_dev_id,
	.probe = cy_pci_probe,
	.remove = __devexit_p(cy_pci_remove)
};
#endif

5241
static int
L
Linus Torvalds 已提交
5242
cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5243
		int *eof, void *data)
L
Linus Torvalds 已提交
5244
{
5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256
	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
5257 5258
	len += size;

5259 5260 5261 5262 5263 5264 5265
	/* 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
5266
				(cur_jifs - info->idle_stats.in_use) / HZ,
5267
				info->idle_stats.xmit_bytes,
J
Jiri Slaby 已提交
5268
				(cur_jifs - info->idle_stats.xmit_idle) / HZ,
5269
				info->idle_stats.recv_bytes,
J
Jiri Slaby 已提交
5270
				(cur_jifs - info->idle_stats.recv_idle) / HZ,
5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282 5283 5284 5285
				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
5286
	}
5287
	*eof = 1;
L
Linus Torvalds 已提交
5288
done:
5289 5290 5291 5292 5293 5294 5295
	*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
5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315
}

/* 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
5316
static const struct tty_operations cy_ops = {
5317 5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330 5331 5332 5333 5334 5335 5336
	.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
5337 5338
};

5339
static int __init cy_init(void)
L
Linus Torvalds 已提交
5340
{
5341
	unsigned int i, nboards;
5342
	int retval = -ENOMEM;
5343 5344 5345

	cy_serial_driver = alloc_tty_driver(NR_PORTS);
	if (!cy_serial_driver)
5346
		goto err;
J
Jiri Slaby 已提交
5347 5348 5349

	printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
			__DATE__, __TIME__);
5350 5351 5352 5353 5354 5355 5356 5357 5358 5359 5360 5361 5362

	/* 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;
5363
	cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5364 5365
	tty_set_operations(cy_serial_driver, &cy_ops);

5366 5367 5368 5369 5370
	retval = tty_register_driver(cy_serial_driver);
	if (retval) {
		printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
		goto err_frtty;
	}
5371 5372 5373 5374 5375 5376

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

5377 5378 5379 5380 5381 5382
	/* invalidate remaining cy_port structures */
	for (i = 0; i < NR_PORTS; i++) {
		cy_port[i].line = -1;
		cy_port[i].magic = -1;
	}

5383 5384 5385 5386 5387 5388 5389 5390
	/* 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 */
5391
	nboards = cy_detect_isa();
5392

5393
#ifdef CONFIG_PCI
5394
	/* look for pci boards */
5395 5396
	retval = pci_register_driver(&cy_pci_driver);
	if (retval && !nboards)
5397
		goto err_unr;
5398
#endif
5399 5400 5401 5402 5403 5404 5405 5406

	return 0;
err_unr:
	tty_unregister_driver(cy_serial_driver);
err_frtty:
	put_tty_driver(cy_serial_driver);
err:
	return retval;
5407
}				/* cy_init */
L
Linus Torvalds 已提交
5408

5409
static void __exit cy_cleanup_module(void)
L
Linus Torvalds 已提交
5410
{
5411
	int i, e1;
L
Linus Torvalds 已提交
5412 5413

#ifndef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5414
	del_timer_sync(&cyz_timerlist);
L
Linus Torvalds 已提交
5415 5416
#endif /* CONFIG_CYZ_INTR */

5417
	if ((e1 = tty_unregister_driver(cy_serial_driver)))
J
Jiri Slaby 已提交
5418 5419
		printk(KERN_ERR "failed to unregister Cyclades serial "
				"driver(%d)\n", e1);
L
Linus Torvalds 已提交
5420

5421
	put_tty_driver(cy_serial_driver);
L
Linus Torvalds 已提交
5422

5423 5424 5425 5426
#ifdef CONFIG_PCI
	pci_unregister_driver(&cy_pci_driver);
#endif

5427 5428
	for (i = 0; i < NR_CARDS; i++) {
		if (cy_card[i].base_addr) {
5429 5430
			/* clear interrupt */
			cy_writeb(cy_card[i].base_addr + Cy_ClrIntr, 0);
5431 5432 5433 5434
			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
5435
#ifndef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5436
				&& !IS_CYC_Z(cy_card[i])
L
Linus Torvalds 已提交
5437
#endif /* CONFIG_CYZ_INTR */
5438 5439
				)
				free_irq(cy_card[i].irq, &cy_card[i]);
5440 5441 5442 5443
			for (e1 = cy_card[i].first_line;
					e1 < cy_card[i].first_line +
					cy_card[i].nports; e1++)
				tty_unregister_device(cy_serial_driver, e1);
5444 5445
		}
	}
L
Linus Torvalds 已提交
5446 5447 5448 5449 5450 5451
} /* cy_cleanup_module */

module_init(cy_init);
module_exit(cy_cleanup_module);

MODULE_LICENSE("GPL");