cyclades.c 153.1 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 {						\
658
		spin_lock_irqsave(&info->card->card_lock, flags); \
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		} while (0)
660

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#define	CY_UNLOCK(info,flags)					\
		do {						\
663
		spin_unlock_irqrestore(&info->card->card_lock, flags); \
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		} 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

718
#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
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#ifdef MODULE
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static long maddr[NR_CARDS];
static int irq[NR_CARDS];
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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];

740
static int cy_next_channel;	/* next minor available */
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/*
 * This is used to look up the divisor speeds and the timeouts
 * We're normally limited to 15 distinct baud rates.  The extra
 * are accessed via settings in info->flags.
 *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
 *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
 *                                               HI            VHI
 *     20
 */
static int baud_table[] = {
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	0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
	1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
	230400, 0
};

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

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

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

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

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

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

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

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

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

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static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
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#else				/* CONFIG_CYZ_INTR */
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static void cyz_rx_restart(unsigned long);
static struct timer_list cyz_rx_full_timer[NR_PORTS];
856
#endif				/* CONFIG_CYZ_INTR */
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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);
872 873 874 875
		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
881 882
	return 0;
}				/* serial_paranoia_check */
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/*
 * This routine is used by the interrupt handler to schedule
 * processing in the software interrupt portion of the driver
 * (also known as the "bottom half").  This can be called any
 * number of times for any channel without harm.
 */
890
static inline void cy_sched_event(struct cyclades_port *info, int event)
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{
892 893 894
	info->event |= 1 << event; /* remember what kind of event and who */
	schedule_work(&info->tqueue);
}				/* cy_sched_event */
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/*
 * This routine is used to handle the "bottom half" processing for the
 * serial driver, known also the "software interrupt" processing.
 * This processing is done at the kernel interrupt level, after the
 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON.  This
 * is where time-consuming activities which can not be done in the
 * interrupt driver proper are done; the interrupt driver schedules
 * them using cy_sched_event(), and they get done here.
 *
 * This is done through one level of indirection--the task queue.
 * When a hardware interrupt service routine wants service by the
 * driver's bottom half, it enqueues the appropriate tq_struct (one
 * per port) to the keventd work queue and sets a request flag
 * that the work queue be processed.
 *
 * Although this may seem unwieldy, it gives the system a way to
 * pass an argument (in this case the pointer to the cyclades_port
 * structure) to the bottom half of the driver.  Previous kernels
 * had to poll every port to see if that port needed servicing.
 */
static void
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do_softint(struct work_struct *work)
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{
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	struct cyclades_port *info =
		container_of(work, struct cyclades_port, tqueue);
921 922 923 924 925 926 927 928 929 930 931 932 933
	struct tty_struct    *tty;

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

	if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
		tty_hangup(info->tty);
		wake_up_interruptible(&info->open_wait);
		        info->flags &= ~ASYNC_NORMAL_ACTIVE;
	}
	if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
		wake_up_interruptible(&info->open_wait);
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#ifdef CONFIG_CYZ_INTR
935 936 937 938 939 940 941 942
	if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
		if (cyz_rx_full_timer[info->line].function == NULL) {
			cyz_rx_full_timer[info->line].expires = jiffies + 1;
			cyz_rx_full_timer[info->line].function = cyz_rx_restart;
			cyz_rx_full_timer[info->line].data =
						(unsigned long)info;
			add_timer(&cyz_rx_full_timer[info->line]);
		}
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	}
#endif
945 946 947
	if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
		wake_up_interruptible(&info->delta_msr_wait);
	tty_wakeup(tty);
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#ifdef Z_WAKE
949
	if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
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		complete(&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
	struct cyclades_card *cinfo = info->card;
1559
	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
Linus Torvalds 已提交
1564
#else
1565
	char data;
L
Linus Torvalds 已提交
1566
#endif
J
Jiri Slaby 已提交
1567
	__u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
L
Linus Torvalds 已提交
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
Linus Torvalds 已提交
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
Linus Torvalds 已提交
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;
			}
L
Linus Torvalds 已提交
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
Linus Torvalds 已提交
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
Linus Torvalds 已提交
1647 1648 1649 1650
	}
}

static void
J
Jiri Slaby 已提交
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
	struct cyclades_card *cinfo = info->card;
1655 1656
	struct tty_struct *tty = info->tty;
	char data;
J
Jiri Slaby 已提交
1657
	int char_count;
L
Linus Torvalds 已提交
1658
#ifdef BLOCKMOVE
1659
	int small_count;
L
Linus Torvalds 已提交
1660
#endif
J
Jiri Slaby 已提交
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
Linus Torvalds 已提交
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;
L
Linus Torvalds 已提交
1674

1675
	if (char_count) {
L
Linus Torvalds 已提交
1676

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

1681 1682
		if (info->x_char) {	/* send special char */
			data = info->x_char;
L
Linus Torvalds 已提交
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;
		}
L
Linus Torvalds 已提交
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
Linus Torvalds 已提交
1734 1735 1736
	}
}

1737
static void cyz_handle_cmd(struct cyclades_card *cinfo)
L
Linus Torvalds 已提交
1738
{
1739 1740
	struct tty_struct *tty;
	struct cyclades_port *info;
J
Jiri Slaby 已提交
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
	struct cyclades_port *info = (struct cyclades_port *)arg;
1881
	struct cyclades_card *card = info->card;
1882
	int retval;
1883
	__u32 channel = info->line - card->first_line;
1884 1885 1886
	unsigned long flags;

	CY_LOCK(info, flags);
1887
	retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1888
	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
Linus Torvalds 已提交
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
	struct cyclades_card *card;
1960 1961 1962
	unsigned long flags;
	int retval = 0;
	void __iomem *base_addr;
1963
	int chip, channel, index;
1964
	unsigned long page;
L
Linus Torvalds 已提交
1965

1966
	card = info->card;
1967
	channel = info->line - card->first_line;
L
Linus Torvalds 已提交
1968

1969 1970 1971
	page = get_zeroed_page(GFP_KERNEL);
	if (!page)
		return -ENOMEM;
L
Linus Torvalds 已提交
1972

1973
	CY_LOCK(info, flags);
L
Linus Torvalds 已提交
1974

1975 1976 1977 1978
	if (info->flags & ASYNC_INITIALIZED) {
		free_page(page);
		goto errout;
	}
L
Linus Torvalds 已提交
1979

1980 1981 1982 1983 1984 1985 1986
	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
1987

1988 1989 1990 1991
	if (info->xmit_buf)
		free_page(page);
	else
		info->xmit_buf = (unsigned char *)page;
L
Linus Torvalds 已提交
1992

1993
	CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
1994

1995
	set_line_char(info);
L
Linus Torvalds 已提交
1996

1997
	if (!IS_CYC_Z(*card)) {
1998 1999
		chip = channel >> 2;
		channel &= 0x03;
2000 2001
		index = card->bus_index;
		base_addr = 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 = card->base_addr;
L
Linus Torvalds 已提交
2054

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

2060
		zfw_ctrl = 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
Linus Torvalds 已提交
2070

2071
		cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
L
Linus Torvalds 已提交
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
		cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
#endif				/* CONFIG_CYZ_INTR */
#endif				/* Z_WAKE */

2091
		retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2092
		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
		/* Flush RX buffers before raising DTR and RTS */
2098
		retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
2099
		if (retval != 0) {
J
Jiri Slaby 已提交
2100 2101
			printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
				"%x\n", info->line, retval);
2102
		}
L
Linus Torvalds 已提交
2103

2104 2105 2106
		/* set timeout !!! */
		/* set RTS and DTR !!! */
		cy_writel(&ch_ctrl[channel].rs_control,
2107
			readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2108
			C_RS_DTR);
2109
		retval = cyz_issue_cmd(info->card, channel,
2110 2111
				C_CM_IOCTLM, 0L);
		if (retval != 0) {
J
Jiri Slaby 已提交
2112 2113
			printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
				"%x\n", info->line, retval);
2114
		}
L
Linus Torvalds 已提交
2115
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
2116
		printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
L
Linus Torvalds 已提交
2117 2118
#endif

2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130
		/* 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
Linus Torvalds 已提交
2131

2132
		CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
2133 2134 2135
	}

#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2136
	printk(KERN_DEBUG "cyc startup done\n");
L
Linus Torvalds 已提交
2137 2138 2139 2140 2141 2142
#endif
	return 0;

errout:
	CY_UNLOCK(info, flags);
	return retval;
2143
}				/* startup */
L
Linus Torvalds 已提交
2144

2145
static void start_xmit(struct cyclades_port *info)
L
Linus Torvalds 已提交
2146
{
2147
	struct cyclades_card *card;
2148 2149
	unsigned long flags;
	void __iomem *base_addr;
2150
	int chip, channel, index;
L
Linus Torvalds 已提交
2151

2152
	card = info->card;
2153 2154
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
2155 2156
		chip = channel >> 2;
		channel &= 0x03;
2157 2158
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2159 2160 2161 2162

		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index), channel);
		cy_writeb(base_addr + (CySRER << index),
2163
			readb(base_addr + (CySRER << index)) | CyTxRdy);
2164 2165
		CY_UNLOCK(info, flags);
	} else {
L
Linus Torvalds 已提交
2166
#ifdef CONFIG_CYZ_INTR
2167
		int retval;
L
Linus Torvalds 已提交
2168

2169
		CY_LOCK(info, flags);
2170
		retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2171
		if (retval != 0) {
J
Jiri Slaby 已提交
2172 2173
			printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
				"%x\n", info->line, retval);
2174 2175 2176 2177 2178 2179 2180
		}
		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
2181 2182 2183 2184 2185

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

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

	card = info->card;
2198 2199
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
2200 2201
		chip = channel >> 2;
		channel &= 0x03;
2202 2203
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
2204 2205

#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2206 2207 2208
		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
2209 2210
#endif

2211 2212 2213 2214
		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
2215

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

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

2249
		base_addr = card->base_addr;
L
Linus Torvalds 已提交
2250
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2251 2252
		printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
			"base_addr %p\n", card, channel, base_addr);
L
Linus Torvalds 已提交
2253 2254
#endif

2255
		firm_id = base_addr + ID_ADDRESS;
2256
		if (!ISZLOADED(*card)) {
2257 2258
			return;
		}
L
Linus Torvalds 已提交
2259

2260
		zfw_ctrl = card->base_addr +
2261
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
2262 2263
		board_ctrl = &zfw_ctrl->board_ctrl;
		ch_ctrl = zfw_ctrl->ch_ctrl;
L
Linus Torvalds 已提交
2264

2265
		CY_LOCK(info, flags);
L
Linus Torvalds 已提交
2266

2267 2268 2269 2270 2271
		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
2272
		}
2273 2274 2275

		if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
			cy_writel(&ch_ctrl[channel].rs_control,
2276
				(__u32)(readl(&ch_ctrl[channel].rs_control) &
2277
					~(C_RS_RTS | C_RS_DTR)));
2278
			retval = cyz_issue_cmd(info->card, channel,
2279 2280
					C_CM_IOCTLM, 0L);
			if (retval != 0) {
J
Jiri Slaby 已提交
2281 2282
				printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
					"was %x\n", info->line, retval);
2283
			}
L
Linus Torvalds 已提交
2284
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
2285
			printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
L
Linus Torvalds 已提交
2286
#endif
2287
		}
L
Linus Torvalds 已提交
2288

2289 2290 2291 2292 2293 2294 2295
		if (info->tty) {
			set_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		info->flags &= ~ASYNC_INITIALIZED;

		CY_UNLOCK(info, flags);
	}
L
Linus Torvalds 已提交
2296 2297

#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2298
	printk(KERN_DEBUG "cyc shutdown done\n");
L
Linus Torvalds 已提交
2299
#endif
2300
}				/* shutdown */
L
Linus Torvalds 已提交
2301 2302 2303 2304 2305 2306 2307 2308

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

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

2319
	cinfo = info->card;
2320 2321 2322 2323 2324 2325 2326
	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)) {
J
Jiri Slaby 已提交
2327 2328
		wait_event_interruptible(info->close_wait,
				!(info->flags & ASYNC_CLOSING));
J
Jiri Slaby 已提交
2329
		return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
L
Linus Torvalds 已提交
2330
	}
2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349

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

	/*
	 * Block waiting for the carrier detect and the line to become
	 * free (i.e., not in use by the callout).  While we are in
	 * this loop, info->count is dropped by one, so that
	 * cy_close() knows when to free things.  We restore it upon
	 * exit, either normal or abnormal.
	 */
	retval = 0;
	add_wait_queue(&info->open_wait, &wait);
L
Linus Torvalds 已提交
2350
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2351 2352
	printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
		"count = %d\n", info->line, info->count);
L
Linus Torvalds 已提交
2353
#endif
2354 2355 2356 2357
	CY_LOCK(info, flags);
	if (!tty_hung_up_p(filp))
		info->count--;
	CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
2358
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2359 2360
	printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
		"%d\n", current->pid, info->count);
L
Linus Torvalds 已提交
2361
#endif
2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378
	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
2379
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
2380 2381 2382
				printk(KERN_DEBUG "cyc:block_til_ready raising "
					"DTR\n");
				printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2383 2384
					readb(base_addr + (CyMSVR1 << index)),
					readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
2385
#endif
2386 2387
			}
			CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
2388

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

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

2408 2409 2410 2411
			if (signal_pending(current)) {
				retval = -ERESTARTSYS;
				break;
			}
L
Linus Torvalds 已提交
2412
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2413 2414 2415
			printk(KERN_DEBUG "cyc block_til_ready blocking: "
				"ttyC%d, count = %d\n",
				info->line, info->count);
L
Linus Torvalds 已提交
2416
#endif
2417
			schedule();
L
Linus Torvalds 已提交
2418
		}
2419 2420 2421 2422 2423 2424 2425 2426 2427 2428
	} 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)) {
2429
			__set_current_state(TASK_RUNNING);
2430 2431 2432 2433
			remove_wait_queue(&info->open_wait, &wait);
			return -EINVAL;
		}

2434
		zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2435 2436 2437 2438 2439 2440
		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,
2441 2442
					readl(&ch_ctrl[channel].rs_control) |
					C_RS_RTS | C_RS_DTR);
2443
				retval = cyz_issue_cmd(info->card,
2444
					channel, C_CM_IOCTLM, 0L);
2445
				if (retval != 0) {
J
Jiri Slaby 已提交
2446 2447
					printk(KERN_ERR "cyc:block_til_ready "
						"retval on ttyC%d was %x\n",
2448 2449
						info->line, retval);
				}
L
Linus Torvalds 已提交
2450
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
2451 2452
				printk(KERN_DEBUG "cyc:block_til_ready raising "
					"Z DTR\n");
L
Linus Torvalds 已提交
2453
#endif
2454
			}
L
Linus Torvalds 已提交
2455

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

/*
 * This routine is called whenever a serial port is opened.  It
 * performs the serial-specific initialization for the tty structure.
 */
2504
static int cy_open(struct tty_struct *tty, struct file *filp)
L
Linus Torvalds 已提交
2505
{
2506 2507
	struct cyclades_port *info;
	int retval, line;
L
Linus Torvalds 已提交
2508

2509 2510 2511 2512 2513 2514 2515 2516
	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
2517

2518 2519 2520 2521
	/* If the card's firmware hasn't been loaded,
	   treat it as absent from the system.  This
	   will make the user pay attention.
	 */
2522 2523
	if (IS_CYC_Z(*info->card)) {
		struct cyclades_card *cinfo = info->card;
2524 2525 2526
		struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;

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

				board_ctrl = &zfw_ctrl->board_ctrl;

				/* Enable interrupts on the PLX chip */
				cy_writew(cinfo->ctl_addr + 0x68,
2559
					readw(cinfo->ctl_addr + 0x68) | 0x0900);
2560 2561 2562 2563
				/* 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
2564 2565
					printk(KERN_ERR "cyc:IRQ enable retval "
						"was %x\n", retval);
2566 2567
				}
				cinfo->nports =
2568
					(int)readl(&board_ctrl->n_channel);
2569 2570
				cinfo->intr_enabled = 1;
			}
L
Linus Torvalds 已提交
2571
		}
2572 2573 2574 2575
#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
2576 2577
	}
#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
2578
	printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2579
#endif
2580 2581 2582 2583 2584
	tty->driver_data = info;
	info->tty = tty;
	if (serial_paranoia_check(info, tty->name, "cy_open")) {
		return -ENODEV;
	}
L
Linus Torvalds 已提交
2585
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2586 2587
	printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
			info->count);
L
Linus Torvalds 已提交
2588
#endif
2589
	info->count++;
L
Linus Torvalds 已提交
2590
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2591
	printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2592
		current->pid, info->count);
L
Linus Torvalds 已提交
2593 2594
#endif

2595 2596 2597 2598
	/*
	 * If the port is the middle of closing, bail out now
	 */
	if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
J
Jiri Slaby 已提交
2599 2600
		wait_event_interruptible(info->close_wait,
				!(info->flags & ASYNC_CLOSING));
J
Jiri Slaby 已提交
2601
		return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2602
	}
L
Linus Torvalds 已提交
2603

2604 2605 2606 2607 2608 2609 2610
	/*
	 * Start up serial port
	 */
	retval = startup(info);
	if (retval) {
		return retval;
	}
L
Linus Torvalds 已提交
2611

2612 2613
	retval = block_til_ready(tty, filp, info);
	if (retval) {
L
Linus Torvalds 已提交
2614
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2615 2616
		printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
			"with %d\n", retval);
L
Linus Torvalds 已提交
2617
#endif
2618 2619
		return retval;
	}
L
Linus Torvalds 已提交
2620

2621
	info->throttle = 0;
L
Linus Torvalds 已提交
2622

2623
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2624
	printk(KERN_DEBUG "cyc:cy_open done\n");
2625 2626 2627
#endif
	return 0;
}				/* cy_open */
L
Linus Torvalds 已提交
2628 2629 2630 2631

/*
 * cy_wait_until_sent() --- wait until the transmitter is empty
 */
2632
static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
L
Linus Torvalds 已提交
2633
{
2634
	struct cyclades_card *card;
2635
	struct cyclades_port *info = tty->driver_data;
2636
	void __iomem *base_addr;
2637
	int chip, channel, index;
2638 2639 2640 2641 2642 2643 2644 2645
	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
2646

2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674
	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
2675
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
J
Jiri Slaby 已提交
2676 2677
	printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
		timeout, char_time, jiffies);
L
Linus Torvalds 已提交
2678
#endif
2679
	card = info->card;
2680 2681
	channel = (info->line) - (card->first_line);
	if (!IS_CYC_Z(*card)) {
2682 2683
		chip = channel >> 2;
		channel &= 0x03;
2684 2685
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2686
		while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
L
Linus Torvalds 已提交
2687
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
J
Jiri Slaby 已提交
2688
			printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
L
Linus Torvalds 已提交
2689
#endif
2690 2691 2692 2693 2694 2695 2696
			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
2697
		/* Nothing to do! */
L
Linus Torvalds 已提交
2698
	}
2699 2700
	/* Run one more char cycle */
	msleep_interruptible(jiffies_to_msecs(char_time * 5));
L
Linus Torvalds 已提交
2701
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
J
Jiri Slaby 已提交
2702
	printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
L
Linus Torvalds 已提交
2703 2704 2705 2706 2707 2708
#endif
}

/*
 * This routine is called when a particular tty device is closed.
 */
2709
static void cy_close(struct tty_struct *tty, struct file *filp)
L
Linus Torvalds 已提交
2710
{
2711
	struct cyclades_port *info = tty->driver_data;
2712
	unsigned long flags;
L
Linus Torvalds 已提交
2713 2714

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
2715
	printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2716 2717
#endif

2718 2719 2720
	if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
		return;
	}
L
Linus Torvalds 已提交
2721

2722 2723 2724 2725 2726 2727
	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
2728
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2729 2730
	printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
		info->count);
L
Linus Torvalds 已提交
2731
#endif
2732 2733 2734 2735 2736 2737 2738 2739
	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
2740 2741
		printk(KERN_ERR "cyc:cy_close: bad serial port count; "
			"tty->count is 1, info->count is %d\n", info->count);
2742 2743
		info->count = 1;
	}
L
Linus Torvalds 已提交
2744
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2745
	printk(KERN_DEBUG  "cyc:cy_close at (%d): decrementing count to %d\n",
2746
		current->pid, info->count - 1);
L
Linus Torvalds 已提交
2747
#endif
2748
	if (--info->count < 0) {
L
Linus Torvalds 已提交
2749
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2750
		printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
L
Linus Torvalds 已提交
2751
#endif
2752
		info->count = 0;
L
Linus Torvalds 已提交
2753
	}
2754 2755 2756 2757 2758
	if (info->count) {
		CY_UNLOCK(info, flags);
		return;
	}
	info->flags |= ASYNC_CLOSING;
L
Linus Torvalds 已提交
2759

2760 2761 2762 2763 2764 2765 2766 2767
	/*
	 * 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
2768
	}
2769 2770
	CY_LOCK(info, flags);

2771 2772 2773 2774
	if (!IS_CYC_Z(*info->card)) {
		int channel = info->line - info->card->first_line;
		int index = info->card->bus_index;
		void __iomem *base_addr = info->card->base_addr +
2775 2776 2777 2778 2779
			(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),
2780
			  readb(base_addr + (CySRER << index)) & ~CyRxData);
2781 2782 2783 2784 2785 2786 2787 2788 2789 2790
		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 */
2791
		void __iomem *base_addr = info->card->base_addr;
2792 2793
		struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
		struct ZFW_CTRL __iomem *zfw_ctrl =
2794
		    base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2795
		struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2796
		int channel = info->line - info->card->first_line;
2797 2798
		int retval;

2799
		if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2800
			retval = cyz_issue_cmd(info->card, channel,
2801 2802
						C_CM_IOCTLW, 0L);
			if (retval != 0) {
J
Jiri Slaby 已提交
2803 2804
				printk(KERN_DEBUG "cyc:cy_close retval on "
					"ttyC%d was %x\n", info->line, retval);
2805 2806
			}
			CY_UNLOCK(info, flags);
J
Jiri Slaby 已提交
2807
			wait_for_completion_interruptible(&info->shutdown_wait);
2808 2809
			CY_LOCK(info, flags);
		}
L
Linus Torvalds 已提交
2810
#endif
2811 2812
	}

L
Linus Torvalds 已提交
2813
	CY_UNLOCK(info, flags);
2814 2815 2816 2817
	shutdown(info);
	if (tty->driver->flush_buffer)
		tty->driver->flush_buffer(tty);
	tty_ldisc_flush(tty);
L
Linus Torvalds 已提交
2818
	CY_LOCK(info, flags);
2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833

	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
2834 2835

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
2836
	printk(KERN_DEBUG "cyc:cy_close done\n");
L
Linus Torvalds 已提交
2837 2838
#endif

2839 2840
	CY_UNLOCK(info, flags);
}				/* cy_close */
L
Linus Torvalds 已提交
2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854

/* 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.
 *
 */
2855
static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
L
Linus Torvalds 已提交
2856
{
2857
	struct cyclades_port *info = tty->driver_data;
2858 2859
	unsigned long flags;
	int c, ret = 0;
L
Linus Torvalds 已提交
2860 2861

#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2862
	printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2863 2864
#endif

2865 2866 2867
	if (serial_paranoia_check(info, tty->name, "cy_write")) {
		return 0;
	}
L
Linus Torvalds 已提交
2868

2869 2870
	if (!info->xmit_buf)
		return 0;
L
Linus Torvalds 已提交
2871

2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897
	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
2898 2899 2900 2901 2902 2903 2904 2905

/*
 * 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.
 */
2906
static void cy_put_char(struct tty_struct *tty, unsigned char ch)
L
Linus Torvalds 已提交
2907
{
2908
	struct cyclades_port *info = tty->driver_data;
2909
	unsigned long flags;
L
Linus Torvalds 已提交
2910 2911

#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2912
	printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2913 2914
#endif

2915 2916
	if (serial_paranoia_check(info, tty->name, "cy_put_char"))
		return;
L
Linus Torvalds 已提交
2917

2918 2919
	if (!info->xmit_buf)
		return;
L
Linus Torvalds 已提交
2920

2921
	CY_LOCK(info, flags);
J
Jiri Slaby 已提交
2922
	if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2923 2924 2925
		CY_UNLOCK(info, flags);
		return;
	}
L
Linus Torvalds 已提交
2926

2927 2928 2929
	info->xmit_buf[info->xmit_head++] = ch;
	info->xmit_head &= SERIAL_XMIT_SIZE - 1;
	info->xmit_cnt++;
L
Linus Torvalds 已提交
2930 2931
	info->idle_stats.xmit_bytes++;
	info->idle_stats.xmit_idle = jiffies;
2932 2933
	CY_UNLOCK(info, flags);
}				/* cy_put_char */
L
Linus Torvalds 已提交
2934 2935 2936 2937 2938

/*
 * This routine is called by the kernel after it has written a
 * series of characters to the tty device using put_char().  
 */
2939
static void cy_flush_chars(struct tty_struct *tty)
L
Linus Torvalds 已提交
2940
{
2941
	struct cyclades_port *info = tty->driver_data;
2942

L
Linus Torvalds 已提交
2943
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2944
	printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2945 2946
#endif

2947 2948
	if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
		return;
L
Linus Torvalds 已提交
2949

2950 2951 2952
	if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
			!info->xmit_buf)
		return;
L
Linus Torvalds 已提交
2953

2954 2955
	start_xmit(info);
}				/* cy_flush_chars */
L
Linus Torvalds 已提交
2956 2957 2958 2959 2960 2961 2962

/*
 * 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.
 */
2963
static int cy_write_room(struct tty_struct *tty)
L
Linus Torvalds 已提交
2964
{
2965
	struct cyclades_port *info = tty->driver_data;
2966 2967
	int ret;

L
Linus Torvalds 已提交
2968
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2969
	printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2970 2971
#endif

2972 2973 2974 2975 2976 2977 2978
	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
2979

2980
static int cy_chars_in_buffer(struct tty_struct *tty)
L
Linus Torvalds 已提交
2981
{
2982
	struct cyclades_card *card;
2983
	struct cyclades_port *info = tty->driver_data;
2984
	int channel;
L
Linus Torvalds 已提交
2985

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

	card = info->card;
2990
	channel = (info->line) - (card->first_line);
L
Linus Torvalds 已提交
2991 2992

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

3009 3010
		firm_id = card->base_addr + ID_ADDRESS;
		zfw_ctrl = card->base_addr +
3011
			(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3012 3013 3014
		ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
		buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);

3015 3016 3017
		tx_get = readl(&buf_ctrl->tx_get);
		tx_put = readl(&buf_ctrl->tx_put);
		tx_bufsize = readl(&buf_ctrl->tx_bufsize);
3018 3019 3020 3021
		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
3022
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
3023 3024
		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
3025
#endif
J
Jiri Slaby 已提交
3026
		return info->xmit_cnt + char_count;
3027 3028 3029
	}
#endif				/* Z_EXT_CHARS_IN_BUFFER */
}				/* cy_chars_in_buffer */
L
Linus Torvalds 已提交
3030 3031 3032 3033 3034 3035 3036

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

K
Klaus Kudielka 已提交
3037
static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
L
Linus Torvalds 已提交
3038
{
3039
	int co, co_val, bpr;
K
Klaus Kudielka 已提交
3040
	__u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3041
			25000000);
L
Linus Torvalds 已提交
3042

3043 3044 3045 3046
	if (baud == 0) {
		info->tbpr = info->tco = info->rbpr = info->rco = 0;
		return;
	}
L
Linus Torvalds 已提交
3047

3048 3049 3050 3051 3052
	/* 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
3053

3054 3055 3056
	bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
	if (bpr > 255)
		bpr = 255;
L
Linus Torvalds 已提交
3057

3058 3059
	info->tbpr = info->rbpr = bpr;
	info->tco = info->rco = co;
L
Linus Torvalds 已提交
3060 3061 3062 3063 3064 3065
}

/*
 * This routine finds or computes the various line characteristics.
 * It used to be called config_setup
 */
3066
static void set_line_char(struct cyclades_port *info)
L
Linus Torvalds 已提交
3067
{
3068
	struct cyclades_card *card;
3069 3070
	unsigned long flags;
	void __iomem *base_addr;
3071
	int chip, channel, index;
3072 3073 3074 3075 3076 3077 3078
	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
3079
	}
3080 3081
	if (info->line == -1) {
		return;
L
Linus Torvalds 已提交
3082
	}
3083 3084
	cflag = info->tty->termios->c_cflag;
	iflag = info->tty->termios->c_iflag;
L
Linus Torvalds 已提交
3085

3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097
	/*
	 * 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
3098
	}
3099 3100

	card = info->card;
3101
	channel = info->line - card->first_line;
3102 3103
	chip_number = channel / 4;

3104
	if (!IS_CYC_Z(*card)) {
3105

3106
		index = card->bus_index;
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

		/* 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
3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221

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

3222 3223
		chip = channel >> 2;
		channel &= 0x03;
3224
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
3225

3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257
		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),
3258
				readb(base_addr + (CySRER << index)) | CyMdmCh);
3259 3260 3261 3262 3263 3264 3265 3266 3267 3268
			/* 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
3269
		} else {
3270 3271
			/* without modem intr */
			cy_writeb(base_addr + (CySRER << index),
3272
				  readb(base_addr +
3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285
					   (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
3286
		}
3287 3288 3289 3290 3291 3292 3293 3294 3295

		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
3296
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3297 3298
			printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3299 3300
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3301
#endif
3302 3303 3304 3305 3306 3307 3308 3309
		} 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
3310
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3311 3312
			printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3313 3314
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3315
#endif
3316
		}
L
Linus Torvalds 已提交
3317

3318 3319 3320 3321
		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
3322 3323

	} else {
3324 3325 3326 3327 3328
		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
3329
		__u32 sw_flow;
3330
		int retval;
L
Linus Torvalds 已提交
3331

3332 3333
		firm_id = card->base_addr + ID_ADDRESS;
		if (!ISZLOADED(*card)) {
3334 3335
			return;
		}
L
Linus Torvalds 已提交
3336

3337
		zfw_ctrl = card->base_addr +
3338
			(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370
		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
3371

3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388
		/* 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,
3389
				  readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3390 3391
		} else {
			cy_writel(&ch_ctrl->comm_data_l,
3392
				  readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3393 3394 3395 3396 3397 3398 3399 3400 3401 3402
		}
		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
3403

3404 3405 3406
		/* CTS flow control flag */
		if (cflag & CRTSCTS) {
			cy_writel(&ch_ctrl->hw_flow,
3407
				readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3408
		} else {
3409 3410
			cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
					~(C_RS_CTS | C_RS_RTS));
3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424
		}
		/* 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);

3425
		retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3426
		if (retval != 0) {
J
Jiri Slaby 已提交
3427 3428
			printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
				"was %x\n", info->line, retval);
3429 3430 3431 3432 3433 3434 3435 3436
		}

		/* CD sensitivity */
		if (cflag & CLOCAL) {
			info->flags &= ~ASYNC_CHECK_CD;
		} else {
			info->flags |= ASYNC_CHECK_CD;
		}
L
Linus Torvalds 已提交
3437

3438 3439
		if (baud == 0) {	/* baud rate is zero, turn off line */
			cy_writel(&ch_ctrl->rs_control,
3440
				  readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
L
Linus Torvalds 已提交
3441
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3442
			printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
L
Linus Torvalds 已提交
3443
#endif
3444 3445
		} else {
			cy_writel(&ch_ctrl->rs_control,
3446
				  readl(&ch_ctrl->rs_control) | C_RS_DTR);
L
Linus Torvalds 已提交
3447
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3448
			printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
L
Linus Torvalds 已提交
3449
#endif
3450
		}
L
Linus Torvalds 已提交
3451

3452
		retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3453
		if (retval != 0) {
J
Jiri Slaby 已提交
3454 3455
			printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
				"was %x\n", info->line, retval);
3456
		}
L
Linus Torvalds 已提交
3457

3458 3459 3460
		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
L
Linus Torvalds 已提交
3461
	}
3462
}				/* set_line_char */
L
Linus Torvalds 已提交
3463 3464

static int
3465 3466
get_serial_info(struct cyclades_port *info,
		struct serial_struct __user * retinfo)
L
Linus Torvalds 已提交
3467
{
3468
	struct serial_struct tmp;
3469
	struct cyclades_card *cinfo = info->card;
L
Linus Torvalds 已提交
3470

3471 3472 3473 3474 3475
	if (!retinfo)
		return -EFAULT;
	memset(&tmp, 0, sizeof(tmp));
	tmp.type = info->type;
	tmp.line = info->line;
3476 3477
	tmp.port = (info->card - cy_card) * 0x100 + info->line -
		cinfo->first_line;
3478 3479 3480
	tmp.irq = cinfo->irq;
	tmp.flags = info->flags;
	tmp.close_delay = info->close_delay;
3481
	tmp.closing_wait = info->closing_wait;
3482 3483 3484 3485 3486
	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
3487 3488

static int
3489 3490
set_serial_info(struct cyclades_port *info,
		struct serial_struct __user * new_info)
L
Linus Torvalds 已提交
3491
{
3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523
	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
3524 3525

check_and_exit:
3526 3527 3528 3529 3530 3531 3532
	if (info->flags & ASYNC_INITIALIZED) {
		set_line_char(info);
		return 0;
	} else {
		return startup(info);
	}
}				/* set_serial_info */
L
Linus Torvalds 已提交
3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543

/*
 * 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.
 */
3544
static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
L
Linus Torvalds 已提交
3545
{
3546 3547
	struct cyclades_card *card;
	int chip, channel, index;
3548 3549 3550 3551
	unsigned char status;
	unsigned int result;
	unsigned long flags;
	void __iomem *base_addr;
L
Linus Torvalds 已提交
3552

3553
	card = info->card;
3554 3555
	channel = (info->line) - (card->first_line);
	if (!IS_CYC_Z(*card)) {
3556 3557
		chip = channel >> 2;
		channel &= 0x03;
3558 3559
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3560 3561

		CY_LOCK(info, flags);
3562
		status = readb(base_addr + (CySRER << index)) &
3563 3564 3565 3566 3567 3568 3569 3570
				(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
3571 3572
}

3573
static int cy_tiocmget(struct tty_struct *tty, struct file *file)
L
Linus Torvalds 已提交
3574
{
3575
	struct cyclades_port *info = tty->driver_data;
3576 3577
	struct cyclades_card *card;
	int chip, channel, index;
3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589
	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
	card = info->card;
3592 3593
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
3594 3595
		chip = channel >> 2;
		channel &= 0x03;
3596 3597
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
3598

3599 3600
		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3601 3602
		status = readb(base_addr + (CyMSVR1 << index));
		status |= readb(base_addr + (CyMSVR2 << index));
3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615
		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
3616
	} else {
3617 3618 3619 3620
		base_addr = card->base_addr;
		firm_id = card->base_addr + ID_ADDRESS;
		if (ISZLOADED(*card)) {
			zfw_ctrl = card->base_addr +
3621
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3622 3623
			board_ctrl = &zfw_ctrl->board_ctrl;
			ch_ctrl = zfw_ctrl->ch_ctrl;
3624
			lstatus = readl(&ch_ctrl[channel].rs_status);
3625 3626 3627 3628 3629 3630 3631 3632 3633 3634
			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
3635

3636 3637 3638
	}
	return result;
}				/* cy_tiomget */
L
Linus Torvalds 已提交
3639 3640 3641

static int
cy_tiocmset(struct tty_struct *tty, struct file *file,
3642
		unsigned int set, unsigned int clear)
L
Linus Torvalds 已提交
3643
{
3644
	struct cyclades_port *info = tty->driver_data;
3645 3646
	struct cyclades_card *card;
	int chip, channel, index;
3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658
	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;
3659 3660
	channel = (info->line) - (card->first_line);
	if (!IS_CYC_Z(*card)) {
3661 3662
		chip = channel >> 2;
		channel &= 0x03;
3663 3664
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
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

		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
3703
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3704 3705
			printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3706 3707
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3708
#endif
3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721
			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
3722 3723

#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3724 3725
			printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3726 3727
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3728
#endif
3729 3730 3731
			CY_UNLOCK(info, flags);
		}
	} else {
3732
		base_addr = card->base_addr;
3733

3734 3735 3736
		firm_id = card->base_addr + ID_ADDRESS;
		if (ISZLOADED(*card)) {
			zfw_ctrl = card->base_addr +
3737
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3738 3739 3740 3741 3742 3743
			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,
3744 3745
					readl(&ch_ctrl[channel].rs_control) |
					C_RS_RTS);
3746 3747 3748 3749 3750
				CY_UNLOCK(info, flags);
			}
			if (clear & TIOCM_RTS) {
				CY_LOCK(info, flags);
				cy_writel(&ch_ctrl[channel].rs_control,
3751 3752
					readl(&ch_ctrl[channel].rs_control) &
					~C_RS_RTS);
3753 3754 3755 3756 3757
				CY_UNLOCK(info, flags);
			}
			if (set & TIOCM_DTR) {
				CY_LOCK(info, flags);
				cy_writel(&ch_ctrl[channel].rs_control,
3758 3759
					readl(&ch_ctrl[channel].rs_control) |
					C_RS_DTR);
L
Linus Torvalds 已提交
3760
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3761 3762
				printk(KERN_DEBUG "cyc:set_modem_info raising "
					"Z DTR\n");
L
Linus Torvalds 已提交
3763
#endif
3764 3765 3766 3767 3768
				CY_UNLOCK(info, flags);
			}
			if (clear & TIOCM_DTR) {
				CY_LOCK(info, flags);
				cy_writel(&ch_ctrl[channel].rs_control,
3769 3770
					readl(&ch_ctrl[channel].rs_control) &
					~C_RS_DTR);
L
Linus Torvalds 已提交
3771
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3772 3773
				printk(KERN_DEBUG "cyc:set_modem_info clearing "
					"Z DTR\n");
L
Linus Torvalds 已提交
3774
#endif
3775 3776 3777 3778 3779 3780
				CY_UNLOCK(info, flags);
			}
		} else {
			return -ENODEV;
		}
		CY_LOCK(info, flags);
3781
		retval = cyz_issue_cmd(info->card,
3782 3783
					channel, C_CM_IOCTLM, 0L);
		if (retval != 0) {
J
Jiri Slaby 已提交
3784 3785
			printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
				"was %x\n", info->line, retval);
3786 3787
		}
		CY_UNLOCK(info, flags);
L
Linus Torvalds 已提交
3788
	}
3789 3790
	return 0;
}				/* cy_tiocmset */
L
Linus Torvalds 已提交
3791 3792 3793 3794

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

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

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

		if (break_state == -1) {
3831 3832
			retval = cyz_issue_cmd(info->card,
				info->line - info->card->first_line,
3833 3834
				C_CM_SET_BREAK, 0L);
			if (retval != 0) {
J
Jiri Slaby 已提交
3835 3836
				printk(KERN_ERR "cyc:cy_break (set) retval on "
					"ttyC%d was %x\n", info->line, retval);
3837 3838
			}
		} else {
3839 3840
			retval = cyz_issue_cmd(info->card,
				info->line - info->card->first_line,
3841 3842
				C_CM_CLR_BREAK, 0L);
			if (retval != 0) {
J
Jiri Slaby 已提交
3843 3844 3845
				printk(KERN_DEBUG "cyc:cy_break (clr) retval "
					"on ttyC%d was %x\n", info->line,
					retval);
3846
			}
L
Linus Torvalds 已提交
3847 3848
		}
	}
3849 3850
	CY_UNLOCK(info, flags);
}				/* cy_break */
L
Linus Torvalds 已提交
3851 3852

static int
3853
get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
L
Linus Torvalds 已提交
3854 3855
{

3856 3857 3858 3859 3860 3861 3862 3863
	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
3864

3865
static int set_threshold(struct cyclades_port *info, unsigned long value)
L
Linus Torvalds 已提交
3866
{
3867
	struct cyclades_card *card;
3868
	void __iomem *base_addr;
3869
	int channel, chip, index;
3870
	unsigned long flags;
L
Linus Torvalds 已提交
3871

3872
	card = info->card;
3873 3874
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
3875 3876
		chip = channel >> 2;
		channel &= 0x03;
3877
		index = card->bus_index;
3878
		base_addr =
3879
		    card->base_addr + (cy_chip_offset[chip] << index);
3880 3881 3882

		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
	struct cyclades_card *card;
3898
	void __iomem *base_addr;
3899
	int channel, chip, index;
3900
	unsigned long tmp;
L
Linus Torvalds 已提交
3901

3902
	card = info->card;
3903 3904
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
3905 3906
		chip = channel >> 2;
		channel &= 0x03;
3907 3908
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3909

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
	struct cyclades_card *card;
3934
	void __iomem *base_addr;
3935
	int channel, chip, index;
3936
	unsigned long flags;
L
Linus Torvalds 已提交
3937

3938
	card = info->card;
3939 3940
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
3941 3942
		chip = channel >> 2;
		channel &= 0x03;
3943 3944
		index = card->bus_index;
		base_addr = 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
	struct cyclades_card *card;
3958
	void __iomem *base_addr;
3959
	int channel, chip, index;
3960
	unsigned long tmp;
L
Linus Torvalds 已提交
3961

3962
	card = info->card;
3963 3964
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
3965 3966
		chip = channel >> 2;
		channel &= 0x03;
3967 3968
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3969

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
		/* note the counters on entry */
J
Jiri Slaby 已提交
4093
		cnow = info->icount;
L
Linus Torvalds 已提交
4094
		CY_UNLOCK(info, flags);
J
Jiri Slaby 已提交
4095 4096
		ret_val = wait_event_interruptible(info->delta_msr_wait, ({
			cprev = cnow;
4097 4098 4099 4100
			CY_LOCK(info, flags);
			cnow = info->icount;	/* atomic copy */
			CY_UNLOCK(info, flags);

J
Jiri Slaby 已提交
4101 4102 4103 4104 4105 4106
			((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));
		}));
		break;
L
Linus Torvalds 已提交
4107

4108 4109 4110 4111 4112 4113
		/*
		 * 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
4114
	case TIOCGICOUNT:
4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 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
		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
4157 4158

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4159
	printk(KERN_DEBUG "cyc:cy_ioctl done\n");
L
Linus Torvalds 已提交
4160 4161
#endif

4162 4163
	return ret_val;
}				/* cy_ioctl */
L
Linus Torvalds 已提交
4164 4165 4166 4167 4168 4169 4170

/*
 * 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.
 */
4171
static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
L
Linus Torvalds 已提交
4172
{
4173
	struct cyclades_port *info = tty->driver_data;
L
Linus Torvalds 已提交
4174 4175

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4176
	printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4177 4178
#endif

4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189
	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
4190
#if 0
4191 4192 4193 4194 4195 4196 4197 4198 4199
	/*
	 * 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
4200
#endif
4201
}				/* cy_set_termios */
L
Linus Torvalds 已提交
4202 4203 4204 4205

/* This function is used to send a high-priority XON/XOFF character to
   the device.
*/
4206
static void cy_send_xchar(struct tty_struct *tty, char ch)
L
Linus Torvalds 已提交
4207
{
4208
	struct cyclades_port *info = tty->driver_data;
4209 4210
	struct cyclades_card *card;
	int channel;
L
Linus Torvalds 已提交
4211

4212
	if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
L
Linus Torvalds 已提交
4213 4214
		return;

4215
	info->x_char = ch;
L
Linus Torvalds 已提交
4216 4217

	if (ch)
4218
		cy_start(tty);
L
Linus Torvalds 已提交
4219 4220

	card = info->card;
4221
	channel = info->line - card->first_line;
L
Linus Torvalds 已提交
4222

4223
	if (IS_CYC_Z(*card)) {
4224
		if (ch == STOP_CHAR(tty))
4225
			cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4226
		else if (ch == START_CHAR(tty))
4227
			cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
L
Linus Torvalds 已提交
4228 4229 4230 4231 4232 4233 4234
	}
}

/* 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.
 */
4235
static void cy_throttle(struct tty_struct *tty)
L
Linus Torvalds 已提交
4236
{
4237
	struct cyclades_port *info = tty->driver_data;
4238
	struct cyclades_card *card;
4239 4240
	unsigned long flags;
	void __iomem *base_addr;
4241
	int chip, channel, index;
L
Linus Torvalds 已提交
4242 4243

#ifdef CY_DEBUG_THROTTLE
4244
	char buf[64];
L
Linus Torvalds 已提交
4245

J
Jiri Slaby 已提交
4246
	printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4247
			tty->ldisc.chars_in_buffer(tty), info->line);
L
Linus Torvalds 已提交
4248 4249
#endif

4250 4251 4252 4253 4254 4255 4256
	if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
		return;
	}

	card = info->card;

	if (I_IXOFF(tty)) {
4257
		if (!IS_CYC_Z(*card))
4258 4259 4260 4261
			cy_send_xchar(tty, STOP_CHAR(tty));
		else
			info->throttle = 1;
	}
L
Linus Torvalds 已提交
4262

4263
	if (tty->termios->c_cflag & CRTSCTS) {
4264 4265
		channel = info->line - card->first_line;
		if (!IS_CYC_Z(*card)) {
4266 4267
			chip = channel >> 2;
			channel &= 0x03;
4268 4269
			index = card->bus_index;
			base_addr = card->base_addr +
4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287
				(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
4288 4289 4290 4291 4292 4293

/*
 * 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.
 */
4294
static void cy_unthrottle(struct tty_struct *tty)
L
Linus Torvalds 已提交
4295
{
4296
	struct cyclades_port *info = tty->driver_data;
4297
	struct cyclades_card *card;
4298 4299
	unsigned long flags;
	void __iomem *base_addr;
4300
	int chip, channel, index;
L
Linus Torvalds 已提交
4301 4302

#ifdef CY_DEBUG_THROTTLE
4303 4304
	char buf[64];

J
Jiri Slaby 已提交
4305 4306
	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
4307 4308
#endif

4309 4310 4311
	if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
		return;
	}
L
Linus Torvalds 已提交
4312

4313 4314 4315 4316 4317
	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
4318 4319
	}

4320 4321
	if (tty->termios->c_cflag & CRTSCTS) {
		card = info->card;
4322 4323
		channel = info->line - card->first_line;
		if (!IS_CYC_Z(*card)) {
4324 4325
			chip = channel >> 2;
			channel &= 0x03;
4326 4327
			index = card->bus_index;
			base_addr = card->base_addr +
4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345
				(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
4346 4347 4348 4349

/* cy_start and cy_stop provide software output flow control as a
   function of XON/XOFF, software CTS, and other such stuff.
*/
4350
static void cy_stop(struct tty_struct *tty)
L
Linus Torvalds 已提交
4351
{
4352
	struct cyclades_card *cinfo;
4353
	struct cyclades_port *info = tty->driver_data;
4354 4355 4356
	void __iomem *base_addr;
	int chip, channel, index;
	unsigned long flags;
L
Linus Torvalds 已提交
4357 4358

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4359
	printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4360 4361
#endif

4362 4363
	if (serial_paranoia_check(info, tty->name, "cy_stop"))
		return;
L
Linus Torvalds 已提交
4364

4365
	cinfo = info->card;
4366 4367 4368 4369 4370
	channel = info->line - cinfo->first_line;
	if (!IS_CYC_Z(*cinfo)) {
		index = cinfo->bus_index;
		chip = channel >> 2;
		channel &= 0x03;
4371
		base_addr = info->card->base_addr +
4372
			(cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
4373

4374 4375 4376 4377
		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index),
			(u_char)(channel & 0x0003)); /* index channel */
		cy_writeb(base_addr + (CySRER << index),
4378
			  readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4379 4380
		CY_UNLOCK(info, flags);
	} else {
J
Jiri Slaby 已提交
4381
		/* Nothing to do! */
4382 4383
	}
}				/* cy_stop */
L
Linus Torvalds 已提交
4384

4385
static void cy_start(struct tty_struct *tty)
L
Linus Torvalds 已提交
4386
{
4387
	struct cyclades_card *cinfo;
4388
	struct cyclades_port *info = tty->driver_data;
4389 4390 4391
	void __iomem *base_addr;
	int chip, channel, index;
	unsigned long flags;
L
Linus Torvalds 已提交
4392 4393

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4394
	printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4395 4396
#endif

4397 4398
	if (serial_paranoia_check(info, tty->name, "cy_start"))
		return;
L
Linus Torvalds 已提交
4399

4400
	cinfo = info->card;
4401 4402 4403 4404 4405
	channel = info->line - cinfo->first_line;
	index = cinfo->bus_index;
	if (!IS_CYC_Z(*cinfo)) {
		chip = channel >> 2;
		channel &= 0x03;
4406
		base_addr = info->card->base_addr +
4407
			(cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
4408

4409 4410 4411
		CY_LOCK(info, flags);
		cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003));	/* index channel */
		cy_writeb(base_addr + (CySRER << index),
4412
			  readb(base_addr + (CySRER << index)) | CyTxRdy);
4413 4414
		CY_UNLOCK(info, flags);
	} else {
J
Jiri Slaby 已提交
4415
		/* Nothing to do! */
4416 4417
	}
}				/* cy_start */
L
Linus Torvalds 已提交
4418

4419
static void cy_flush_buffer(struct tty_struct *tty)
L
Linus Torvalds 已提交
4420
{
4421
	struct cyclades_port *info = tty->driver_data;
4422 4423
	struct cyclades_card *card;
	int channel, retval;
4424 4425
	unsigned long flags;

L
Linus Torvalds 已提交
4426
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
4427
	printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4428 4429
#endif

4430 4431
	if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
		return;
L
Linus Torvalds 已提交
4432

4433
	card = info->card;
4434
	channel = info->line - card->first_line;
L
Linus Torvalds 已提交
4435 4436

	CY_LOCK(info, flags);
4437
	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
L
Linus Torvalds 已提交
4438 4439
	CY_UNLOCK(info, flags);

4440
	if (IS_CYC_Z(*card)) {	/* If it is a Z card, flush the on-board
4441 4442
					   buffers as well */
		CY_LOCK(info, flags);
4443
		retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4444
		if (retval != 0) {
J
Jiri Slaby 已提交
4445 4446
			printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
				"was %x\n", info->line, retval);
4447 4448 4449 4450 4451
		}
		CY_UNLOCK(info, flags);
	}
	tty_wakeup(tty);
}				/* cy_flush_buffer */
L
Linus Torvalds 已提交
4452 4453 4454 4455

/*
 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
 */
4456
static void cy_hangup(struct tty_struct *tty)
L
Linus Torvalds 已提交
4457
{
4458
	struct cyclades_port *info = tty->driver_data;
4459

L
Linus Torvalds 已提交
4460
#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4461
	printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4462 4463
#endif

4464 4465
	if (serial_paranoia_check(info, tty->name, "cy_hangup"))
		return;
L
Linus Torvalds 已提交
4466

4467 4468 4469 4470
	cy_flush_buffer(tty);
	shutdown(info);
	info->event = 0;
	info->count = 0;
L
Linus Torvalds 已提交
4471
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
4472 4473
	printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
		current->pid);
L
Linus Torvalds 已提交
4474
#endif
4475 4476 4477 4478
	info->tty = NULL;
	info->flags &= ~ASYNC_NORMAL_ACTIVE;
	wake_up_interruptible(&info->open_wait);
}				/* cy_hangup */
L
Linus Torvalds 已提交
4479 4480 4481 4482 4483 4484 4485 4486 4487

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

4488
static void __devinit cy_init_card(struct cyclades_card *cinfo)
4489 4490 4491 4492 4493 4494 4495
{
	struct cyclades_port *info;
	u32 mailbox;
	unsigned int nports;
	unsigned short chip_number;
	int index, port;

4496 4497
	spin_lock_init(&cinfo->card_lock);

J
Jiri Slaby 已提交
4498
	if (IS_CYC_Z(*cinfo)) {	/* Cyclades-Z */
4499 4500 4501 4502 4503 4504
		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 */
4505 4506 4507 4508 4509 4510 4511 4512 4513 4514
	} else {
		index = cinfo->bus_index;
		nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
	}

	for (port = cinfo->first_line; port < cinfo->first_line + nports;
			port++) {
		info = &cy_port[port];
		memset(info, 0, sizeof(*info));
		info->magic = CYCLADES_MAGIC;
4515
		info->card = cinfo;
4516 4517 4518 4519 4520 4521 4522 4523
		info->line = port;
		info->flags = STD_COM_FLAGS;
		info->closing_wait = CLOSING_WAIT_DELAY;
		info->close_delay = 5 * HZ / 10;

		INIT_WORK(&info->tqueue, do_softint);
		init_waitqueue_head(&info->open_wait);
		init_waitqueue_head(&info->close_wait);
J
Jiri Slaby 已提交
4524
		init_completion(&info->shutdown_wait);
4525 4526 4527
		init_waitqueue_head(&info->delta_msr_wait);

		if (IS_CYC_Z(*cinfo)) {
4528 4529 4530 4531
			info->type = PORT_STARTECH;
			if (mailbox == ZO_V1)
				info->xmit_fifo_size = CYZ_FIFO_SIZE;
			else
4532
				info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4533 4534 4535 4536
#ifdef CONFIG_CYZ_INTR
			init_timer(&cyz_rx_full_timer[port]);
			cyz_rx_full_timer[port].function = NULL;
#endif
4537
		} else {
4538 4539
			info->type = PORT_CIRRUS;
			info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4540
			info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4541 4542
			info->cor2 = CyETC;
			info->cor3 = 0x08;	/* _very_ small rcv threshold */
4543

4544
			chip_number = (port - cinfo->first_line) / 4;
4545
			if ((info->chip_rev = readb(cinfo->base_addr +
4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561
				      (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->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->rtsdtr_inv = 0;
			}
4562 4563
			info->read_status_mask = CyTIMEOUT | CySPECHAR |
				CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4564
		}
4565

4566
	}
4567 4568 4569 4570 4571 4572 4573 4574 4575

#ifndef CONFIG_CYZ_INTR
	if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
		mod_timer(&cyz_timerlist, jiffies + 1);
#ifdef CY_PCI_DEBUG
		printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
#endif
	}
#endif
4576 4577
}

L
Linus Torvalds 已提交
4578 4579
/* initialize chips on Cyclom-Y card -- return number of valid
   chips (which is number of ports/4) */
4580 4581
static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
		int index)
L
Linus Torvalds 已提交
4582
{
4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595
	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);
4596
		if (readb(base_addr + (CyCCR << index)) != 0x00) {
4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612
			/*************
			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.
		 */
4613
		if (chip_number == 4 && readb(true_base_addr +
4614 4615 4616 4617 4618 4619 4620 4621
				(cy_chip_offset[0] << index) +
				(CyGFRCR << index)) == 0) {
			return chip_number;
		}

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

4622
		if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4623 4624 4625 4626 4627 4628 4629
			/*
			   printk(" chip #%d at %#6lx is not responding ",
			   chip_number, (unsigned long)base_addr);
			   printk("(GFRCR stayed 0)\n",
			 */
			return chip_number;
		}
4630
		if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4631 4632 4633 4634 4635 4636 4637 4638 4639 4640
				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);
4641
		if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4642 4643 4644 4645 4646 4647 4648 4649
			/* 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
4650

4651 4652 4653
		/*
		   printk(" chip #%d at %#6lx is rev 0x%2x\n",
		   chip_number, (unsigned long)base_addr,
4654
		   readb(base_addr+(CyGFRCR<<index)));
4655 4656 4657 4658
		 */
	}
	return chip_number;
}				/* cyy_init_card */
L
Linus Torvalds 已提交
4659 4660 4661 4662 4663 4664 4665

/*
 * ---------------------------------------------------------------------
 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
 * sets global variables and return the number of ISA boards found.
 * ---------------------------------------------------------------------
 */
4666
static int __init cy_detect_isa(void)
L
Linus Torvalds 已提交
4667 4668
{
#ifdef CONFIG_ISA
4669 4670 4671
	unsigned short cy_isa_irq, nboard;
	void __iomem *cy_isa_address;
	unsigned short i, j, cy_isa_nchan;
L
Linus Torvalds 已提交
4672
#ifdef MODULE
4673
	int isparam = 0;
L
Linus Torvalds 已提交
4674 4675
#endif

4676
	nboard = 0;
L
Linus Torvalds 已提交
4677 4678 4679

#ifdef MODULE
	/* Check for module parameters */
4680 4681 4682 4683 4684 4685 4686
	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
4687 4688 4689
	}
#endif

4690 4691 4692 4693
	/* 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
4694
			return nboard;
4695
		}
L
Linus Torvalds 已提交
4696

4697
		/* probe for CD1400... */
L
Linus Torvalds 已提交
4698
		cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4699 4700 4701 4702 4703
		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
4704 4705
#ifdef MODULE
		if (isparam && irq[i])
4706
			cy_isa_irq = irq[i];
L
Linus Torvalds 已提交
4707 4708
		else
#endif
4709 4710 4711
			/* 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
4712 4713
			printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
				"IRQ could not be detected.\n",
4714 4715 4716 4717 4718
				(unsigned long)cy_isa_address);
			continue;
		}

		if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
J
Jiri Slaby 已提交
4719 4720 4721
			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",
4722
				(unsigned long)cy_isa_address);
J
Jiri Slaby 已提交
4723
			return nboard;
4724 4725 4726 4727 4728 4729 4730
		}
		/* 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
4731 4732 4733
			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",
4734
				(unsigned long)cy_isa_address);
J
Jiri Slaby 已提交
4735
			return nboard;
4736 4737 4738 4739 4740
		}

		/* allocate IRQ */
		if (request_irq(cy_isa_irq, cyy_interrupt,
				IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
J
Jiri Slaby 已提交
4741 4742 4743
			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
4744
			return nboard;
4745 4746 4747 4748 4749 4750 4751 4752 4753
		}

		/* 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;
4754
		cy_init_card(&cy_card[j]);
4755 4756
		nboard++;

J
Jiri Slaby 已提交
4757 4758
		printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
			"%d channels starting from port %d\n",
4759 4760
			j + 1, (unsigned long)cy_isa_address,
			(unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
J
Jiri Slaby 已提交
4761 4762
			cy_isa_irq, cy_isa_nchan, cy_next_channel);

4763 4764 4765
		for (j = cy_next_channel;
				j < cy_next_channel + cy_isa_nchan; j++)
			tty_register_device(cy_serial_driver, j, NULL);
4766 4767
		cy_next_channel += cy_isa_nchan;
	}
J
Jiri Slaby 已提交
4768
	return nboard;
L
Linus Torvalds 已提交
4769
#else
J
Jiri Slaby 已提交
4770
	return 0;
4771 4772
#endif				/* CONFIG_ISA */
}				/* cy_detect_isa */
L
Linus Torvalds 已提交
4773

J
Jiri Slaby 已提交
4774 4775
#ifdef CONFIG_PCI
static void __devinit plx_init(void __iomem * addr, __u32 initctl)
L
Linus Torvalds 已提交
4776
{
4777
	/* Reset PLX */
4778
	cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
4779
	udelay(100L);
4780
	cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
4781 4782

	/* Reload Config. Registers from EEPROM */
4783
	cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
4784
	udelay(100L);
4785
	cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
L
Linus Torvalds 已提交
4786 4787
}

4788
static int __devinit cy_init_Ze(struct RUNTIME_9060 __iomem *cy_pci_addr0,
J
Jiri Slaby 已提交
4789
		int cy_pci_irq, struct pci_dev *pdev)
J
Jiri Slaby 已提交
4790
{
J
Jiri Slaby 已提交
4791
	void __iomem *cy_pci_addr2;
J
Jiri Slaby 已提交
4792 4793 4794
	unsigned int j;
	unsigned short cy_pci_nchan;

J
Jiri Slaby 已提交
4795 4796
	cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ze_win);

J
Jiri Slaby 已提交
4797
	readl(&cy_pci_addr0->mail_box_0);
J
Jiri Slaby 已提交
4798 4799
	dev_dbg(&pdev->dev, "new Cyclades-Z board.  FPGA not loaded\n");

J
Jiri Slaby 已提交
4800 4801 4802 4803
	/* 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
4804
		dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no channels "
J
Jiri Slaby 已提交
4805
			"are available.\nChange NR_PORTS in cyclades.c "
J
Jiri Slaby 已提交
4806
			"and recompile kernel.\n");
J
Jiri Slaby 已提交
4807 4808 4809 4810 4811 4812 4813 4814 4815
		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
4816
		dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no more "
J
Jiri Slaby 已提交
4817
			"cards can be used.\nChange NR_CARDS in "
J
Jiri Slaby 已提交
4818
			"cyclades.c and recompile kernel.\n");
J
Jiri Slaby 已提交
4819 4820 4821 4822 4823 4824 4825 4826
		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
4827
			dev_err(&pdev->dev, "could not allocate IRQ.\n");
J
Jiri Slaby 已提交
4828 4829 4830 4831 4832 4833 4834 4835
			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
4836
	cy_card[j].irq = cy_pci_irq;
J
Jiri Slaby 已提交
4837 4838 4839
	cy_card[j].bus_index = 1;
	cy_card[j].first_line = cy_next_channel;
	cy_card[j].num_chips = -1;
4840
	cy_init_card(&cy_card[j]);
J
Jiri Slaby 已提交
4841
	pci_set_drvdata(pdev, &cy_card[j]);
J
Jiri Slaby 已提交
4842

J
Jiri Slaby 已提交
4843 4844
	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
4845

4846 4847
	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
4848 4849 4850 4851 4852
	cy_next_channel += cy_pci_nchan;

	return 0;
}

J
Jiri Slaby 已提交
4853 4854
static int __devinit cy_pci_probe(struct pci_dev *pdev,
		const struct pci_device_id *ent)
L
Linus Torvalds 已提交
4855
{
4856
	unsigned char cyy_rev_id;
J
Jiri Slaby 已提交
4857
	int cy_pci_irq;
4858
	__u32 mailbox;
4859
	void __iomem *cy_pci_addr0, *cy_pci_addr2;
J
Jiri Slaby 已提交
4860 4861
	unsigned int device_id;
	unsigned short j, cy_pci_nchan, plx_ver;
J
Jiri Slaby 已提交
4862
	int retval;
4863

J
Jiri Slaby 已提交
4864 4865 4866 4867 4868
	retval = pci_enable_device(pdev);
	if (retval) {
		dev_err(&pdev->dev, "cannot enable device\n");
		return retval;
	}
L
Linus Torvalds 已提交
4869

J
Jiri Slaby 已提交
4870 4871 4872
	/* read PCI configuration area */
	cy_pci_irq = pdev->irq;
	pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
L
Linus Torvalds 已提交
4873

J
Jiri Slaby 已提交
4874
	device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
L
Linus Torvalds 已提交
4875

J
Jiri Slaby 已提交
4876 4877
	if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
			device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
J
Jiri Slaby 已提交
4878
		dev_dbg(&pdev->dev, "Cyclom-Y/PCI found\n");
L
Linus Torvalds 已提交
4879

J
Jiri Slaby 已提交
4880
		if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
J
Jiri Slaby 已提交
4881
			dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
J
Jiri Slaby 已提交
4882 4883 4884
				"set. Ignoring it...\n");
			pdev->resource[2].flags &= ~IORESOURCE_IO;
		}
L
Linus Torvalds 已提交
4885

J
Jiri Slaby 已提交
4886 4887 4888 4889 4890
		/* 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
4891
			dev_err(&pdev->dev, "failed to reserve resources\n");
J
Jiri Slaby 已提交
4892 4893 4894 4895
			return retval;
		}
#if defined(__alpha__)
		if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {	/* below 1M? */
J
Jiri Slaby 已提交
4896 4897
			dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for "
				"low addresses on Alpha systems.\n");
J
Jiri Slaby 已提交
4898 4899
			return -EIO;
		}
L
Linus Torvalds 已提交
4900
#endif
J
Jiri Slaby 已提交
4901 4902
		cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
		cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
L
Linus Torvalds 已提交
4903

J
Jiri Slaby 已提交
4904 4905 4906
		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
4907 4908 4909
		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
4910 4911
			dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
					"Serial-Modules\n");
J
Jiri Slaby 已提交
4912 4913 4914
			return -EIO;
		}
		if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
J
Jiri Slaby 已提交
4915 4916 4917
			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
4918 4919 4920 4921 4922
			return -EIO;
		}
		/* fill the next cy_card structure available */
		for (j = 0; j < NR_CARDS; j++) {
			if (cy_card[j].base_addr == 0)
4923
				break;
J
Jiri Slaby 已提交
4924 4925
		}
		if (j == NR_CARDS) {	/* no more cy_cards available */
J
Jiri Slaby 已提交
4926 4927 4928
			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
4929 4930
			return -EIO;
		}
4931

J
Jiri Slaby 已提交
4932 4933 4934 4935
		/* 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
4936
			dev_err(&pdev->dev, "could not allocate IRQ\n");
J
Jiri Slaby 已提交
4937 4938
			return retval;
		}
4939

J
Jiri Slaby 已提交
4940 4941 4942
		/* 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
4943
		cy_card[j].irq = cy_pci_irq;
J
Jiri Slaby 已提交
4944 4945 4946
		cy_card[j].bus_index = 1;
		cy_card[j].first_line = cy_next_channel;
		cy_card[j].num_chips = cy_pci_nchan / 4;
4947
		cy_init_card(&cy_card[j]);
J
Jiri Slaby 已提交
4948
		pci_set_drvdata(pdev, &cy_card[j]);
4949

J
Jiri Slaby 已提交
4950 4951 4952 4953 4954 4955
		/* 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);
4956 4957
			break;

J
Jiri Slaby 已提交
4958 4959 4960
		case PLX_9060:
		case PLX_9080:
		default:	/* Old boards, use PLX_9060 */
4961 4962

			plx_init(cy_pci_addr0, 0x6c);
J
Jiri Slaby 已提交
4963 4964 4965 4966 4967
		/* 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. */
4968
			pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
J
Jiri Slaby 已提交
4969
					cy_pci_irq);
4970

J
Jiri Slaby 已提交
4971 4972 4973 4974
			cy_writew(cy_pci_addr0 + 0x68,
				readw(cy_pci_addr0 + 0x68) | 0x0900);
			break;
		}
4975

J
Jiri Slaby 已提交
4976 4977 4978 4979
		dev_info(&pdev->dev, "Cyclom-Y/PCI #%d found: %d channels "
			"starting from port %d.\n", j + 1, cy_pci_nchan,
			cy_next_channel);

4980 4981 4982
		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
4983

J
Jiri Slaby 已提交
4984 4985
		cy_next_channel += cy_pci_nchan;
	} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
J
Jiri Slaby 已提交
4986 4987
		dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for "
			"low addresses\n");
J
Jiri Slaby 已提交
4988 4989
		return -EIO;
	} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
J
Jiri Slaby 已提交
4990 4991
		dev_dbg(&pdev->dev, "Cyclades-Z/PCI found\n");

J
Jiri Slaby 已提交
4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003
		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
5004
		pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
5005

J
Jiri Slaby 已提交
5006 5007 5008 5009
		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
5010
			dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
J
Jiri Slaby 已提交
5011 5012 5013 5014 5015 5016 5017 5018 5019
				"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
5020
			dev_err(&pdev->dev, "failed to reserve resources\n");
J
Jiri Slaby 已提交
5021 5022 5023 5024
			return retval;
		}

		if (mailbox == ZE_V1) {
5025
			retval = cy_init_Ze(cy_pci_addr0, cy_pci_irq, pdev);
J
Jiri Slaby 已提交
5026 5027 5028 5029
			return retval;
		} else {
			cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Zwin);
		}
L
Linus Torvalds 已提交
5030

J
Jiri Slaby 已提交
5031 5032
		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
5033
#ifdef CY_PCI_DEBUG
J
Jiri Slaby 已提交
5034 5035 5036 5037
		if (mailbox == ZO_V1) {
			cy_writel(&((struct RUNTIME_9060 *)
				(cy_pci_addr0))->loc_addr_base,
				WIN_CREG);
J
Jiri Slaby 已提交
5038 5039
			dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA id %lx, "
				"ver %lx\n", (ulong)(0xff &
J
Jiri Slaby 已提交
5040
				readl(&((struct CUSTOM_REG *)
J
Jiri Slaby 已提交
5041 5042 5043
					cy_pci_addr2)->fpga_id)),
				(ulong)(0xff & readl(&((struct CUSTOM_REG *)
					cy_pci_addr2)->fpga_version)));
J
Jiri Slaby 已提交
5044
			cy_writel(&((struct RUNTIME_9060 *)
J
Jiri Slaby 已提交
5045
				cy_pci_addr0)->loc_addr_base, WIN_RAM);
J
Jiri Slaby 已提交
5046
		} else {
J
Jiri Slaby 已提交
5047 5048
			dev_info(&pdev->dev, "Cyclades-Z/PCI: New Cyclades-Z "
				"board.  FPGA not loaded\n");
J
Jiri Slaby 已提交
5049
		}
L
Linus Torvalds 已提交
5050
#endif
J
Jiri Slaby 已提交
5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063
		/* 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
5064 5065 5066
			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
5067 5068
			return -EIO;
		}
L
Linus Torvalds 已提交
5069

J
Jiri Slaby 已提交
5070 5071 5072 5073 5074 5075
		/* 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
5076 5077 5078
			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
5079 5080
			return -EIO;
		}
5081
#ifdef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5082 5083 5084 5085 5086 5087
		/* 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
5088
				dev_err(&pdev->dev, "could not allocate IRQ\n");
J
Jiri Slaby 已提交
5089
				return retval;
5090
			}
J
Jiri Slaby 已提交
5091
		}
5092 5093
#endif				/* CONFIG_CYZ_INTR */

J
Jiri Slaby 已提交
5094 5095 5096
		/* 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
5097
		cy_card[j].irq = cy_pci_irq;
J
Jiri Slaby 已提交
5098 5099 5100
		cy_card[j].bus_index = 1;
		cy_card[j].first_line = cy_next_channel;
		cy_card[j].num_chips = -1;
5101
		cy_init_card(&cy_card[j]);
J
Jiri Slaby 已提交
5102 5103
		pci_set_drvdata(pdev, &cy_card[j]);

J
Jiri Slaby 已提交
5104 5105 5106
		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
5107

5108 5109 5110
		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
5111 5112 5113 5114 5115 5116
		cy_next_channel += cy_pci_nchan;
	}

	return 0;
}

5117
static void __devexit cy_pci_remove(struct pci_dev *pdev)
J
Jiri Slaby 已提交
5118
{
J
Jiri Slaby 已提交
5119
	struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5120
	unsigned int i;
J
Jiri Slaby 已提交
5121

5122
	/* non-Z with old PLX */
J
Jiri Slaby 已提交
5123 5124
	if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
			PLX_9050)
5125 5126 5127
		cy_writeb(cinfo->ctl_addr + 0x4c, 0);
	else
#ifndef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5128
		if (!IS_CYC_Z(*cinfo))
5129 5130 5131 5132
#endif
		cy_writew(cinfo->ctl_addr + 0x68,
				readw(cinfo->ctl_addr + 0x68) & ~0x0900);

J
Jiri Slaby 已提交
5133 5134 5135 5136 5137
	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
5138
		&& !IS_CYC_Z(*cinfo)
J
Jiri Slaby 已提交
5139 5140 5141 5142 5143 5144
#endif /* CONFIG_CYZ_INTR */
		)
		free_irq(cinfo->irq, cinfo);
	pci_release_regions(pdev);

	cinfo->base_addr = NULL;
5145 5146 5147 5148
	for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
		cy_port[i].line = -1;
		cy_port[i].magic = -1;
	}
5149 5150 5151
	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
5152 5153
}

5154 5155 5156 5157 5158 5159 5160 5161
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

5162
static int
L
Linus Torvalds 已提交
5163
cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5164
		int *eof, void *data)
L
Linus Torvalds 已提交
5165
{
5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177
	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
5178 5179
	len += size;

5180 5181 5182 5183 5184 5185 5186
	/* 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
5187
				(cur_jifs - info->idle_stats.in_use) / HZ,
5188
				info->idle_stats.xmit_bytes,
J
Jiri Slaby 已提交
5189
				(cur_jifs - info->idle_stats.xmit_idle) / HZ,
5190
				info->idle_stats.recv_bytes,
J
Jiri Slaby 已提交
5191
				(cur_jifs - info->idle_stats.recv_idle) / HZ,
5192 5193 5194 5195 5196 5197 5198 5199 5200 5201 5202 5203 5204 5205 5206
				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
5207
	}
5208
	*eof = 1;
L
Linus Torvalds 已提交
5209
done:
5210 5211 5212 5213 5214 5215 5216
	*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
5217 5218 5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236
}

/* 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
5237
static const struct tty_operations cy_ops = {
5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257
	.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
5258 5259
};

5260
static int __init cy_init(void)
L
Linus Torvalds 已提交
5261
{
5262
	unsigned int i, nboards;
5263
	int retval = -ENOMEM;
5264 5265 5266

	cy_serial_driver = alloc_tty_driver(NR_PORTS);
	if (!cy_serial_driver)
5267
		goto err;
J
Jiri Slaby 已提交
5268 5269 5270

	printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
			__DATE__, __TIME__);
5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282 5283

	/* 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;
5284
	cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5285 5286
	tty_set_operations(cy_serial_driver, &cy_ops);

5287 5288 5289 5290 5291
	retval = tty_register_driver(cy_serial_driver);
	if (retval) {
		printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
		goto err_frtty;
	}
5292

5293 5294 5295 5296 5297
	for (i = 0; i < NR_PORTS; i++) {
		cy_port[i].line = -1;
		cy_port[i].magic = -1;
	}

5298 5299 5300 5301 5302 5303 5304 5305
	/* 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 */
5306
	nboards = cy_detect_isa();
5307

5308
#ifdef CONFIG_PCI
5309
	/* look for pci boards */
5310 5311
	retval = pci_register_driver(&cy_pci_driver);
	if (retval && !nboards)
5312
		goto err_unr;
5313
#endif
5314 5315 5316 5317 5318 5319 5320 5321

	return 0;
err_unr:
	tty_unregister_driver(cy_serial_driver);
err_frtty:
	put_tty_driver(cy_serial_driver);
err:
	return retval;
5322
}				/* cy_init */
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5324
static void __exit cy_cleanup_module(void)
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{
5326
	int i, e1;
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#ifndef CONFIG_CYZ_INTR
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	del_timer_sync(&cyz_timerlist);
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#endif /* CONFIG_CYZ_INTR */

5332
	if ((e1 = tty_unregister_driver(cy_serial_driver)))
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		printk(KERN_ERR "failed to unregister Cyclades serial "
				"driver(%d)\n", e1);
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5336
	put_tty_driver(cy_serial_driver);
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5338 5339 5340 5341
#ifdef CONFIG_PCI
	pci_unregister_driver(&cy_pci_driver);
#endif

5342 5343
	for (i = 0; i < NR_CARDS; i++) {
		if (cy_card[i].base_addr) {
5344 5345
			/* clear interrupt */
			cy_writeb(cy_card[i].base_addr + Cy_ClrIntr, 0);
5346 5347 5348 5349
			iounmap(cy_card[i].base_addr);
			if (cy_card[i].ctl_addr)
				iounmap(cy_card[i].ctl_addr);
			if (cy_card[i].irq
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#ifndef CONFIG_CYZ_INTR
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				&& !IS_CYC_Z(cy_card[i])
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#endif /* CONFIG_CYZ_INTR */
5353 5354
				)
				free_irq(cy_card[i].irq, &cy_card[i]);
5355 5356 5357 5358
			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);
5359 5360
		}
	}
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} /* cy_cleanup_module */

module_init(cy_init);
module_exit(cy_cleanup_module);

MODULE_LICENSE("GPL");