cyclades.c 155.2 KB
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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>.
 *
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 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
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 *
 * 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.
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 * Converted to pci probing and cleaned up by Jiri Slaby.
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 *
 * 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;
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 * 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
362
 * as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
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 *
 * 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
 *
 */

593
#define CY_VERSION	"2.5"
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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. */

599
#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. */

606
#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>
649
#include <linux/firmware.h>
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#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>

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

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

662 663
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 == (unsigned int)-1)
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#define Z_FPGA_CHECK(card) \
668
	((readl(&((struct RUNTIME_9060 __iomem *) \
669
		((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
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671
#define ISZLOADED(card)	(((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
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672 673
			((card).ctl_addr))->mail_box_0)) || \
			Z_FPGA_CHECK(card)) && \
674
			(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)

684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721
/* firmware stuff */
#define ZL_MAX_BLOCKS	16
#define DRIVER_VERSION	0x02010203
#define RAM_SIZE 0x80000

#define Z_FPGA_LOADED(X)	((readl(&(X)->init_ctrl) & (1<<17)) != 0)

enum zblock_type {
	ZBLOCK_PRG = 0,
	ZBLOCK_FPGA = 1
};

struct zfile_header {
	char name[64];
	char date[32];
	char aux[32];
	u32 n_config;
	u32 config_offset;
	u32 n_blocks;
	u32 block_offset;
	u32 reserved[9];
} __attribute__ ((packed));

struct zfile_config {
	char name[64];
	u32 mailbox;
	u32 function;
	u32 n_blocks;
	u32 block_list[ZL_MAX_BLOCKS];
} __attribute__ ((packed));

struct zfile_block {
	u32 type;
	u32 file_offset;
	u32 ram_offset;
	u32 size;
} __attribute__ ((packed));

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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.
*/

static unsigned int cy_isa_addresses[] = {
733 734 735 736 737 738 739 740 741
	0xD0000,
	0xD2000,
	0xD4000,
	0xD6000,
	0xD8000,
	0xDA000,
	0xDC000,
	0xDE000,
	0, 0, 0, 0, 0, 0, 0, 0
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};
743

744
#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
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#ifdef MODULE
747 748
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

754
#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];

761
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[] = {
773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808
	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.
 */

821 822 823 824 825
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.
 */
830 831 832 833 834 835 836 837 838
static int cy_chip_offset[] = { 0x0000,
	0x0400,
	0x0800,
	0x0C00,
	0x0200,
	0x0600,
	0x0A00,
	0x0E00
};
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/* PCI related definitions */

#ifdef CONFIG_PCI
843 844 845 846 847 848 849 850 851 852
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 */
853
};
854
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 *);
862
#endif				/* CONFIG_ISA */
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864
static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
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865 866 867 868 869 870 871

#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;

872
static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
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873

874
#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];
877
#endif				/* CONFIG_CYZ_INTR */
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879 880
static inline int serial_paranoia_check(struct cyclades_port *info,
		char *name, const char *routine)
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{
#ifdef SERIAL_PARANOIA_CHECK
883
	if (!info) {
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		printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
				"in %s\n", name, routine);
886 887 888 889
		return 1;
	}

	if (info->magic != CYCLADES_MAGIC) {
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890 891
		printk(KERN_WARNING "cyc Warning: bad magic number for serial "
				"struct (%s) in %s\n", name, routine);
892 893
		return 1;
	}
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#endif
895 896
	return 0;
}				/* serial_paranoia_check */
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/***********************************************************/
/********* 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.
 */
908
static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
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909
{
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910
	unsigned int i;
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912 913
	/* Check to see that the previous command has completed */
	for (i = 0; i < 100; i++) {
914
		if (readb(base_addr + (CyCCR << index)) == 0) {
915 916 917
			break;
		}
		udelay(10L);
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918
	}
919 920 921
	/* if the CCR never cleared, the previous command
	   didn't finish within the "reasonable time" */
	if (i == 100)
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922
		return -1;
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923

924 925
	/* Issue the new command */
	cy_writeb(base_addr + (CyCCR << index), cmd);
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926

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927
	return 0;
928
}				/* cyy_issue_cmd */
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929 930 931

#ifdef CONFIG_ISA
/* ISA interrupt detection code */
932
static unsigned detect_isa_irq(void __iomem * address)
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{
934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956
	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),
957
		  readb(address + (CySRER << index)) | CyTxRdy);
958 959 960 961 962 963 964 965 966
	local_irq_restore(flags);

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

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

	/* Clean up */
967 968
	save_xir = (u_char) readb(address + (CyTIR << index));
	save_car = readb(address + (CyCAR << index));
969 970
	cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
	cy_writeb(address + (CySRER << index),
971
		  readb(address + (CySRER << index)) & ~CyTxRdy);
972 973 974 975 976 977
	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;
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}
979
#endif				/* CONFIG_ISA */
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981 982
static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
		void __iomem *base_addr)
983 984 985
{
	struct cyclades_port *info;
	struct tty_struct *tty;
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986 987
	int len, index = cinfo->bus_index;
	u8 save_xir, channel, save_car, data, char_count;
988 989

#ifdef CY_DEBUG_INTERRUPTS
990
	printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
991
#endif
992
	/* determine the channel & change to that context */
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993 994
	save_xir = readb(base_addr + (CyRIR << index));
	channel = save_xir & CyIRChannel;
995 996 997 998 999 1000
	info = &cinfo->ports[channel + chip * 4];
	save_car = readb(base_addr + (CyCAR << index));
	cy_writeb(base_addr + (CyCAR << index), save_xir);

	/* if there is nowhere to put the data, discard it */
	if (info->tty == NULL) {
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1001 1002
		if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
				CyIVRRxEx) {	/* exception */
1003 1004 1005 1006
			data = readb(base_addr + (CyRDSR << index));
		} else {	/* normal character reception */
			char_count = readb(base_addr + (CyRDCR << index));
			while (char_count--)
1007
				data = readb(base_addr + (CyRDSR << index));
1008 1009 1010 1011 1012
		}
		goto end;
	}
	/* there is an open port for this data */
	tty = info->tty;
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	if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
			CyIVRRxEx) {	/* exception */
1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063
		data = readb(base_addr + (CyRDSR << index));

		/* 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,
						readb(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,
						readb(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,
						readb(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,
						readb(base_addr + (CyRDSR <<
							index)), TTY_FRAME);
1064 1065
					info->icount.rx++;
					info->idle_stats.overruns++;
1066 1067 1068 1069 1070 1071 1072 1073
				/* 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++;
1074
				}
1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087
			} 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 */
		char_count = readb(base_addr + (CyRDCR << index));
1088 1089

#ifdef CY_ENABLE_MONITORING
1090 1091 1092 1093 1094
		++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;
1095
#endif
1096 1097 1098 1099 1100 1101
		len = tty_buffer_request_room(tty, char_count);
		while (len--) {
			data = readb(base_addr + (CyRDSR << index));
			tty_insert_flip_char(tty, data, TTY_NORMAL);
			info->idle_stats.recv_bytes++;
			info->icount.rx++;
1102
#ifdef CY_16Y_HACK
1103
			udelay(10L);
1104 1105
#endif
		}
1106
		info->idle_stats.recv_idle = jiffies;
1107
	}
1108 1109 1110 1111 1112 1113
	tty_schedule_flip(tty);
end:
	/* end of service */
	cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
	cy_writeb(base_addr + (CyCAR << index), save_car);
}
1114

J
Jiri Slaby 已提交
1115
static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
1116 1117 1118
		void __iomem *base_addr)
{
	struct cyclades_port *info;
J
Jiri Slaby 已提交
1119 1120
	int char_count, index = cinfo->bus_index;
	u8 save_xir, channel, save_car, outch;
1121 1122 1123 1124

	/* Since we only get here when the transmit buffer
	   is empty, we know we can always stuff a dozen
	   characters. */
1125
#ifdef CY_DEBUG_INTERRUPTS
1126
	printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1127 1128
#endif

1129
	/* determine the channel & change to that context */
J
Jiri Slaby 已提交
1130 1131
	save_xir = readb(base_addr + (CyTIR << index));
	channel = save_xir & CyIRChannel;
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
	save_car = readb(base_addr + (CyCAR << index));
	cy_writeb(base_addr + (CyCAR << index), save_xir);

	/* validate the port# (as configured and open) */
	if (channel + chip * 4 >= cinfo->nports) {
		cy_writeb(base_addr + (CySRER << index),
			  readb(base_addr + (CySRER << index)) & ~CyTxRdy);
		goto end;
	}
	info = &cinfo->ports[channel + chip * 4];
	if (info->tty == NULL) {
		cy_writeb(base_addr + (CySRER << index),
			  readb(base_addr + (CySRER << index)) & ~CyTxRdy);
		goto end;
	}
1147

1148 1149
	/* load the on-chip space for outbound data */
	char_count = info->xmit_fifo_size;
1150

1151 1152 1153 1154 1155 1156 1157
	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;
	}
1158

1159 1160 1161 1162 1163 1164
	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;
1165
		}
1166 1167 1168 1169 1170
		if (info->breakoff) {
			cy_writeb(base_addr + (CyTDR << index), 0);
			cy_writeb(base_addr + (CyTDR << index), 0x83);
			info->breakoff = 0;
			char_count -= 2;
1171
		}
1172
	}
1173

1174 1175 1176 1177 1178
	while (char_count-- > 0) {
		if (!info->xmit_cnt) {
			if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
				cy_writeb(base_addr + (CySRER << index),
					readb(base_addr + (CySRER << index)) &
1179
						~CyTxMpty);
1180 1181 1182
			} else {
				cy_writeb(base_addr + (CySRER << index),
					(readb(base_addr + (CySRER << index)) &
1183 1184
						~CyTxRdy) | CyTxMpty);
			}
1185 1186 1187 1188 1189
			goto done;
		}
		if (info->xmit_buf == NULL) {
			cy_writeb(base_addr + (CySRER << index),
				readb(base_addr + (CySRER << index)) &
1190
					~CyTxRdy);
1191 1192 1193 1194 1195
			goto done;
		}
		if (info->tty->stopped || info->tty->hw_stopped) {
			cy_writeb(base_addr + (CySRER << index),
				readb(base_addr + (CySRER << index)) &
1196
					~CyTxRdy);
1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216
			goto done;
		}
		/* 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) {
1217 1218
				info->xmit_cnt--;
				info->xmit_tail = (info->xmit_tail + 1) &
1219
					(SERIAL_XMIT_SIZE - 1);
1220
				cy_writeb(base_addr + (CyTDR << index), outch);
1221
				cy_writeb(base_addr + (CyTDR << index), 0);
1222
				info->icount.tx++;
1223
				char_count--;
1224
			}
1225 1226 1227
		}
	}

1228 1229 1230 1231 1232 1233 1234
done:
	tty_wakeup(info->tty);
end:
	/* end of service */
	cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
	cy_writeb(base_addr + (CyCAR << index), save_car);
}
1235

1236 1237 1238 1239
static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
		void __iomem *base_addr)
{
	struct cyclades_port *info;
J
Jiri Slaby 已提交
1240 1241
	int index = cinfo->bus_index;
	u8 save_xir, channel, save_car, mdm_change, mdm_status;
1242 1243

	/* determine the channel & change to that context */
J
Jiri Slaby 已提交
1244 1245
	save_xir = readb(base_addr + (CyMIR << index));
	channel = save_xir & CyIRChannel;
1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286
	info = &cinfo->ports[channel + chip * 4];
	save_car = readb(base_addr + (CyCAR << index));
	cy_writeb(base_addr + (CyCAR << index), save_xir);

	mdm_change = readb(base_addr + (CyMISR << index));
	mdm_status = readb(base_addr + (CyMSVR1 << index));

	if (!info->tty)
		goto end;

	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++;

		wake_up_interruptible(&info->delta_msr_wait);
	}

	if ((mdm_change & CyDCD) && (info->flags & ASYNC_CHECK_CD)) {
		if (!(mdm_status & CyDCD)) {
			tty_hangup(info->tty);
			info->flags &= ~ASYNC_NORMAL_ACTIVE;
		}
		wake_up_interruptible(&info->open_wait);
	}
	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),
					readb(base_addr + (CySRER << index)) |
						CyTxRdy);
				tty_wakeup(info->tty);
1287
			}
1288 1289 1290 1291 1292 1293 1294 1295
		} else {
			if (!(mdm_status & CyCTS)) {
				/* cy_stop isn't used
				   because ... !!! */
				info->tty->hw_stopped = 1;
				cy_writeb(base_addr + (CySRER << index),
					readb(base_addr + (CySRER << index)) &
						~CyTxRdy);
1296
			}
1297 1298
		}
	}
1299 1300 1301 1302 1303 1304 1305 1306
/*	if (mdm_change & CyDSR) {
	}
	if (mdm_change & CyRI) {
	}*/
end:
	/* end of service */
	cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
	cy_writeb(base_addr + (CyCAR << index), save_car);
1307 1308
}

L
Linus Torvalds 已提交
1309 1310 1311 1312
/* The real interrupt service routine is called
   whenever the card wants its hand held--chars
   received, out buffer empty, modem change, etc.
 */
1313
static irqreturn_t cyy_interrupt(int irq, void *dev_id)
L
Linus Torvalds 已提交
1314
{
1315
	int status;
J
Jiri Slaby 已提交
1316
	struct cyclades_card *cinfo = dev_id;
1317
	void __iomem *base_addr, *card_base_addr;
J
Jiri Slaby 已提交
1318
	unsigned int chip, too_many, had_work;
1319 1320
	int index;

J
Jiri Slaby 已提交
1321
	if (unlikely(cinfo == NULL)) {
L
Linus Torvalds 已提交
1322
#ifdef CY_DEBUG_INTERRUPTS
J
Jiri Slaby 已提交
1323
		printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
L
Linus Torvalds 已提交
1324
#endif
1325 1326 1327 1328 1329 1330
		return IRQ_NONE;	/* spurious interrupt */
	}

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

J
Jiri Slaby 已提交
1331 1332 1333 1334
	/* card was not initialized yet (e.g. DEBUG_SHIRQ) */
	if (unlikely(card_base_addr == NULL))
		return IRQ_HANDLED;

1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345
	/* 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;
1346
			while ((status = readb(base_addr +
1347 1348 1349 1350 1351 1352 1353
						(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).
			 */
1354
				if (1000 < too_many++)
1355
					break;
1356
				spin_lock(&cinfo->card_lock);
1357 1358 1359 1360 1361 1362
				if (status & CySRReceive) /* rx intr */
					cyy_chip_rx(cinfo, chip, base_addr);
				if (status & CySRTransmit) /* tx intr */
					cyy_chip_tx(cinfo, chip, base_addr);
				if (status & CySRModem) /* modem intr */
					cyy_chip_modem(cinfo, chip, base_addr);
1363
				spin_unlock(&cinfo->card_lock);
1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374
			}
		}
	} 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
1375 1376 1377 1378 1379 1380 1381

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

static int
1382
cyz_fetch_msg(struct cyclades_card *cinfo,
K
Klaus Kudielka 已提交
1383
		__u32 * channel, __u8 * cmd, __u32 * param)
L
Linus Torvalds 已提交
1384
{
1385 1386 1387 1388 1389 1390 1391
	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
1392
		return -1;
1393
	}
1394
	zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1395 1396
	board_ctrl = &zfw_ctrl->board_ctrl;

1397
	loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1398 1399 1400
				  (cinfo->ctl_addr))->loc_doorbell);
	if (loc_doorbell) {
		*cmd = (char)(0xff & loc_doorbell);
1401 1402
		*channel = readl(&board_ctrl->fwcmd_channel);
		*param = (__u32) readl(&board_ctrl->fwcmd_param);
1403 1404 1405 1406 1407 1408
		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
1409 1410

static int
1411
cyz_issue_cmd(struct cyclades_card *cinfo,
K
Klaus Kudielka 已提交
1412
		__u32 channel, __u8 cmd, __u32 param)
L
Linus Torvalds 已提交
1413
{
1414 1415 1416
	struct FIRM_ID __iomem *firm_id;
	struct ZFW_CTRL __iomem *zfw_ctrl;
	struct BOARD_CTRL __iomem *board_ctrl;
K
Klaus Kudielka 已提交
1417
	__u32 __iomem *pci_doorbell;
J
Jiri Slaby 已提交
1418
	unsigned int index;
1419 1420 1421

	firm_id = cinfo->base_addr + ID_ADDRESS;
	if (!ISZLOADED(*cinfo)) {
J
Jiri Slaby 已提交
1422
		return -1;
1423
	}
1424
	zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1425 1426 1427 1428 1429
	board_ctrl = &zfw_ctrl->board_ctrl;

	index = 0;
	pci_doorbell =
	    &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1430
	while ((readl(pci_doorbell) & 0xff) != 0) {
1431
		if (index++ == 1000) {
1432
			return (int)(readl(pci_doorbell) & 0xff);
1433 1434 1435 1436 1437 1438 1439
		}
		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
1440
	return 0;
1441
}				/* cyz_issue_cmd */
L
Linus Torvalds 已提交
1442

J
Jiri Slaby 已提交
1443
static void cyz_handle_rx(struct cyclades_port *info,
J
Jiri Slaby 已提交
1444
		struct BUF_CTRL __iomem *buf_ctrl)
L
Linus Torvalds 已提交
1445
{
1446
	struct cyclades_card *cinfo = info->card;
1447
	struct tty_struct *tty = info->tty;
J
Jiri Slaby 已提交
1448
	unsigned int char_count;
1449
	int len;
L
Linus Torvalds 已提交
1450
#ifdef BLOCKMOVE
J
Jiri Slaby 已提交
1451
	unsigned char *buf;
L
Linus Torvalds 已提交
1452
#else
1453
	char data;
L
Linus Torvalds 已提交
1454
#endif
J
Jiri Slaby 已提交
1455
	__u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
L
Linus Torvalds 已提交
1456

1457 1458 1459 1460
	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);
1461 1462 1463 1464
	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
1465

1466
	if (char_count) {
L
Linus Torvalds 已提交
1467
#ifdef CY_ENABLE_MONITORING
1468 1469 1470 1471 1472
		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
1473
#endif
J
Jiri Slaby 已提交
1474
		if (tty == NULL) {
1475 1476 1477 1478 1479
			/* flush received characters */
			new_rx_get = (new_rx_get + char_count) &
					(rx_bufsize - 1);
			info->rflush_count++;
		} else {
L
Linus Torvalds 已提交
1480
#ifdef BLOCKMOVE
1481 1482 1483
		/* 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 */
J
Jiri Slaby 已提交
1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496
			while (1) {
				len = tty_prepare_flip_string(tty, &buf,
						char_count);
				if (!len)
					break;

				len = min_t(unsigned int, min(len, char_count),
						rx_bufsize - new_rx_get);

				memcpy_fromio(buf, cinfo->base_addr +
						rx_bufaddr + new_rx_get, len);

				new_rx_get = (new_rx_get + len) &
1497
						(rx_bufsize - 1);
J
Jiri Slaby 已提交
1498 1499 1500
				char_count -= len;
				info->icount.rx += len;
				info->idle_stats.recv_bytes += len;
1501
			}
L
Linus Torvalds 已提交
1502
#else
1503 1504
			len = tty_buffer_request_room(tty, char_count);
			while (len--) {
1505
				data = readb(cinfo->base_addr + rx_bufaddr +
1506 1507 1508 1509 1510 1511
						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
1512 1513
#endif
#ifdef CONFIG_CYZ_INTR
1514 1515
		/* Recalculate the number of chars in the RX buffer and issue
		   a cmd in case it's higher than the RX high water mark */
1516
			rx_put = readl(&buf_ctrl->rx_put);
1517 1518 1519 1520
			if (rx_put >= rx_get)
				char_count = rx_put - rx_get;
			else
				char_count = rx_put - rx_get + rx_bufsize;
J
Jiri Slaby 已提交
1521
			if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1522 1523 1524 1525
					!timer_pending(&cyz_rx_full_timer[
							info->line]))
				mod_timer(&cyz_rx_full_timer[info->line],
						jiffies + 1);
L
Linus Torvalds 已提交
1526
#endif
1527 1528 1529 1530 1531
			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
1532 1533 1534
	}
}

J
Jiri Slaby 已提交
1535
static void cyz_handle_tx(struct cyclades_port *info,
J
Jiri Slaby 已提交
1536
		struct BUF_CTRL __iomem *buf_ctrl)
L
Linus Torvalds 已提交
1537
{
1538
	struct cyclades_card *cinfo = info->card;
1539
	struct tty_struct *tty = info->tty;
J
Jiri Slaby 已提交
1540 1541
	u8 data;
	unsigned int char_count;
L
Linus Torvalds 已提交
1542
#ifdef BLOCKMOVE
1543
	int small_count;
L
Linus Torvalds 已提交
1544
#endif
J
Jiri Slaby 已提交
1545
	__u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
L
Linus Torvalds 已提交
1546

1547 1548
	if (info->xmit_cnt <= 0)	/* Nothing to transmit */
		return;
L
Linus Torvalds 已提交
1549

1550 1551 1552 1553
	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);
1554 1555 1556 1557
	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
1558

1559
	if (char_count) {
L
Linus Torvalds 已提交
1560

J
Jiri Slaby 已提交
1561
		if (tty == NULL)
1562
			goto ztxdone;
L
Linus Torvalds 已提交
1563

1564 1565
		if (info->x_char) {	/* send special char */
			data = info->x_char;
L
Linus Torvalds 已提交
1566

1567 1568 1569 1570 1571 1572
			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++;
		}
L
Linus Torvalds 已提交
1573
#ifdef BLOCKMOVE
1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591
		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);
		}
L
Linus Torvalds 已提交
1592
#else
1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603
		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++;
		}
L
Linus Torvalds 已提交
1604
#endif
1605
		tty_wakeup(tty);
1606
ztxdone:
1607 1608
		/* Update tx_put */
		cy_writel(&buf_ctrl->tx_put, tx_put);
L
Linus Torvalds 已提交
1609 1610 1611
	}
}

1612
static void cyz_handle_cmd(struct cyclades_card *cinfo)
L
Linus Torvalds 已提交
1613
{
1614 1615
	struct tty_struct *tty;
	struct cyclades_port *info;
J
Jiri Slaby 已提交
1616 1617 1618 1619 1620
	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
1621 1622 1623 1624
	__u32 channel;
	__u8 cmd;
	__u32 param;
	__u32 hw_ver, fw_ver;
1625 1626 1627 1628
	int special_count;
	int delta_count;

	firm_id = cinfo->base_addr + ID_ADDRESS;
1629
	zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1630
	board_ctrl = &zfw_ctrl->board_ctrl;
1631 1632
	fw_ver = readl(&board_ctrl->fw_version);
	hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1633 1634 1635 1636 1637
			mail_box_0);

	while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
		special_count = 0;
		delta_count = 0;
J
Jiri Slaby 已提交
1638
		info = &cinfo->ports[channel];
J
Jiri Slaby 已提交
1639
		if ((tty = info->tty) == NULL)
1640
			continue;
J
Jiri Slaby 已提交
1641

1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665
		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) :
1666
						readl(&ch_ctrl->rs_status)) &
1667
						C_RS_DCD) {
1668
					wake_up_interruptible(&info->open_wait);
1669
				} else {
1670 1671 1672
					tty_hangup(info->tty);
					wake_up_interruptible(&info->open_wait);
					info->flags &= ~ASYNC_NORMAL_ACTIVE;
1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687
				}
			}
			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
1688
#ifdef Z_WAKE
1689
		case C_CM_IOCTLW:
1690
			complete(&info->shutdown_wait);
1691
			break;
L
Linus Torvalds 已提交
1692 1693
#endif
#ifdef CONFIG_CYZ_INTR
1694 1695 1696 1697
		case C_CM_RXHIWM:
		case C_CM_RXNNDT:
		case C_CM_INTBACK2:
			/* Reception Interrupt */
L
Linus Torvalds 已提交
1698
#ifdef CY_DEBUG_INTERRUPTS
J
Jiri Slaby 已提交
1699 1700
			printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
					"port %ld\n", info->card, channel);
L
Linus Torvalds 已提交
1701
#endif
J
Jiri Slaby 已提交
1702
			cyz_handle_rx(info, buf_ctrl);
1703 1704 1705 1706 1707
			break;
		case C_CM_TXBEMPTY:
		case C_CM_TXLOWWM:
		case C_CM_INTBACK:
			/* Transmission Interrupt */
L
Linus Torvalds 已提交
1708
#ifdef CY_DEBUG_INTERRUPTS
J
Jiri Slaby 已提交
1709 1710
			printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
					"port %ld\n", info->card, channel);
L
Linus Torvalds 已提交
1711
#endif
J
Jiri Slaby 已提交
1712
			cyz_handle_tx(info, buf_ctrl);
1713 1714 1715 1716 1717 1718 1719 1720 1721
			break;
#endif				/* CONFIG_CYZ_INTR */
		case C_CM_FATAL:
			/* should do something with this !!! */
			break;
		default:
			break;
		}
		if (delta_count)
1722
			wake_up_interruptible(&info->delta_msr_wait);
1723 1724
		if (special_count)
			tty_schedule_flip(tty);
L
Linus Torvalds 已提交
1725 1726 1727 1728
	}
}

#ifdef CONFIG_CYZ_INTR
1729
static irqreturn_t cyz_interrupt(int irq, void *dev_id)
L
Linus Torvalds 已提交
1730
{
J
Jiri Slaby 已提交
1731
	struct cyclades_card *cinfo = dev_id;
L
Linus Torvalds 已提交
1732

J
Jiri Slaby 已提交
1733
	if (unlikely(cinfo == NULL)) {
L
Linus Torvalds 已提交
1734
#ifdef CY_DEBUG_INTERRUPTS
J
Jiri Slaby 已提交
1735
		printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
L
Linus Torvalds 已提交
1736
#endif
1737 1738
		return IRQ_NONE;	/* spurious interrupt */
	}
L
Linus Torvalds 已提交
1739

J
Jiri Slaby 已提交
1740
	if (unlikely(!ISZLOADED(*cinfo))) {
L
Linus Torvalds 已提交
1741
#ifdef CY_DEBUG_INTERRUPTS
J
Jiri Slaby 已提交
1742 1743
		printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
				"(IRQ%d).\n", irq);
L
Linus Torvalds 已提交
1744
#endif
1745 1746
		return IRQ_NONE;
	}
L
Linus Torvalds 已提交
1747

1748 1749
	/* Handle the interrupts */
	cyz_handle_cmd(cinfo);
L
Linus Torvalds 已提交
1750

1751 1752
	return IRQ_HANDLED;
}				/* cyz_interrupt */
L
Linus Torvalds 已提交
1753

1754
static void cyz_rx_restart(unsigned long arg)
L
Linus Torvalds 已提交
1755
{
1756
	struct cyclades_port *info = (struct cyclades_port *)arg;
1757
	struct cyclades_card *card = info->card;
1758
	int retval;
1759
	__u32 channel = info->line - card->first_line;
1760 1761
	unsigned long flags;

1762
	spin_lock_irqsave(&card->card_lock, flags);
1763
	retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1764
	if (retval != 0) {
J
Jiri Slaby 已提交
1765
		printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1766 1767
			info->line, retval);
	}
1768
	spin_unlock_irqrestore(&card->card_lock, flags);
L
Linus Torvalds 已提交
1769 1770
}

1771
#else				/* CONFIG_CYZ_INTR */
L
Linus Torvalds 已提交
1772

1773
static void cyz_poll(unsigned long arg)
L
Linus Torvalds 已提交
1774
{
1775 1776 1777
	struct cyclades_card *cinfo;
	struct cyclades_port *info;
	struct tty_struct *tty;
J
Jiri Slaby 已提交
1778 1779 1780 1781
	struct FIRM_ID __iomem *firm_id;
	struct ZFW_CTRL __iomem *zfw_ctrl;
	struct BOARD_CTRL __iomem *board_ctrl;
	struct BUF_CTRL __iomem *buf_ctrl;
J
Jiri Slaby 已提交
1782
	unsigned long expires = jiffies + HZ;
J
Jiri Slaby 已提交
1783
	unsigned int port, card;
L
Linus Torvalds 已提交
1784

1785 1786 1787 1788 1789 1790 1791 1792 1793 1794
	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 +
1795
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
1796
		board_ctrl = &(zfw_ctrl->board_ctrl);
L
Linus Torvalds 已提交
1797 1798

	/* Skip first polling cycle to avoid racing conditions with the FW */
1799
		if (!cinfo->intr_enabled) {
1800
			cinfo->nports = (int)readl(&board_ctrl->n_channel);
1801 1802 1803
			cinfo->intr_enabled = 1;
			continue;
		}
L
Linus Torvalds 已提交
1804

1805
		cyz_handle_cmd(cinfo);
L
Linus Torvalds 已提交
1806

1807
		for (port = 0; port < cinfo->nports; port++) {
J
Jiri Slaby 已提交
1808
			info = &cinfo->ports[port];
1809 1810
			tty = info->tty;
			buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
L
Linus Torvalds 已提交
1811

1812
			if (!info->throttle)
J
Jiri Slaby 已提交
1813 1814
				cyz_handle_rx(info, buf_ctrl);
			cyz_handle_tx(info, buf_ctrl);
1815 1816
		}
		/* poll every 'cyz_polling_cycle' period */
J
Jiri Slaby 已提交
1817
		expires = jiffies + cyz_polling_cycle;
L
Linus Torvalds 已提交
1818
	}
J
Jiri Slaby 已提交
1819
	mod_timer(&cyz_timerlist, expires);
1820
}				/* cyz_poll */
L
Linus Torvalds 已提交
1821

1822
#endif				/* CONFIG_CYZ_INTR */
L
Linus Torvalds 已提交
1823 1824 1825 1826 1827 1828 1829

/********** 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.
 */
1830
static int startup(struct cyclades_port *info)
L
Linus Torvalds 已提交
1831
{
1832
	struct cyclades_card *card;
1833 1834 1835
	unsigned long flags;
	int retval = 0;
	void __iomem *base_addr;
1836
	int chip, channel, index;
1837
	unsigned long page;
L
Linus Torvalds 已提交
1838

1839
	card = info->card;
1840
	channel = info->line - card->first_line;
L
Linus Torvalds 已提交
1841

1842 1843 1844
	page = get_zeroed_page(GFP_KERNEL);
	if (!page)
		return -ENOMEM;
L
Linus Torvalds 已提交
1845

1846
	spin_lock_irqsave(&card->card_lock, flags);
L
Linus Torvalds 已提交
1847

1848 1849 1850 1851
	if (info->flags & ASYNC_INITIALIZED) {
		free_page(page);
		goto errout;
	}
L
Linus Torvalds 已提交
1852

1853 1854 1855 1856 1857 1858 1859
	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
1860

1861 1862 1863 1864
	if (info->xmit_buf)
		free_page(page);
	else
		info->xmit_buf = (unsigned char *)page;
L
Linus Torvalds 已提交
1865

1866
	spin_unlock_irqrestore(&card->card_lock, flags);
L
Linus Torvalds 已提交
1867

1868
	set_line_char(info);
L
Linus Torvalds 已提交
1869

1870
	if (!IS_CYC_Z(*card)) {
1871 1872
		chip = channel >> 2;
		channel &= 0x03;
1873 1874
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
1875 1876

#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
1877 1878 1879
		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
1880
#endif
1881
		spin_lock_irqsave(&card->card_lock, flags);
L
Linus Torvalds 已提交
1882

1883
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
L
Linus Torvalds 已提交
1884

1885 1886 1887
		cy_writeb(base_addr + (CyRTPR << index),
			(info->default_timeout ? info->default_timeout : 0x02));
		/* 10ms rx timeout */
L
Linus Torvalds 已提交
1888

1889 1890
		cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
				index);
L
Linus Torvalds 已提交
1891

1892 1893 1894
		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
1895 1896

#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
1897 1898
		printk(KERN_DEBUG "cyc:startup raising DTR\n");
		printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
1899 1900
			readb(base_addr + (CyMSVR1 << index)),
			readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
1901 1902
#endif

1903
		cy_writeb(base_addr + (CySRER << index),
1904
			readb(base_addr + (CySRER << index)) | CyRxData);
1905
		info->flags |= ASYNC_INITIALIZED;
L
Linus Torvalds 已提交
1906

1907 1908 1909 1910 1911 1912 1913 1914 1915
		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
1916

1917
		spin_unlock_irqrestore(&card->card_lock, flags);
L
Linus Torvalds 已提交
1918

1919 1920 1921 1922 1923
	} 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;
L
Linus Torvalds 已提交
1924

1925
		base_addr = card->base_addr;
L
Linus Torvalds 已提交
1926

1927
		firm_id = base_addr + ID_ADDRESS;
1928
		if (!ISZLOADED(*card)) {
1929 1930
			return -ENODEV;
		}
L
Linus Torvalds 已提交
1931

1932
		zfw_ctrl = card->base_addr +
1933
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
1934 1935
		board_ctrl = &zfw_ctrl->board_ctrl;
		ch_ctrl = zfw_ctrl->ch_ctrl;
L
Linus Torvalds 已提交
1936 1937

#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
1938 1939
		printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
			"base_addr %p\n", card, channel, base_addr);
L
Linus Torvalds 已提交
1940
#endif
1941
		spin_lock_irqsave(&card->card_lock, flags);
L
Linus Torvalds 已提交
1942

1943
		cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
L
Linus Torvalds 已提交
1944 1945
#ifdef Z_WAKE
#ifdef CONFIG_CYZ_INTR
1946 1947 1948
		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
1949
#else
1950 1951 1952
		cy_writel(&ch_ctrl[channel].intr_enable,
			  C_IN_IOCTLW | C_IN_MDCD);
#endif				/* CONFIG_CYZ_INTR */
L
Linus Torvalds 已提交
1953 1954
#else
#ifdef CONFIG_CYZ_INTR
1955 1956 1957
		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
1958
#else
1959 1960 1961 1962
		cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
#endif				/* CONFIG_CYZ_INTR */
#endif				/* Z_WAKE */

1963
		retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1964
		if (retval != 0) {
J
Jiri Slaby 已提交
1965 1966
			printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
				"%x\n", info->line, retval);
1967
		}
L
Linus Torvalds 已提交
1968

1969
		/* Flush RX buffers before raising DTR and RTS */
1970
		retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1971
		if (retval != 0) {
J
Jiri Slaby 已提交
1972 1973
			printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
				"%x\n", info->line, retval);
1974
		}
L
Linus Torvalds 已提交
1975

1976 1977 1978
		/* set timeout !!! */
		/* set RTS and DTR !!! */
		cy_writel(&ch_ctrl[channel].rs_control,
1979
			readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
1980
			C_RS_DTR);
1981
		retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
1982
		if (retval != 0) {
J
Jiri Slaby 已提交
1983 1984
			printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
				"%x\n", info->line, retval);
1985
		}
L
Linus Torvalds 已提交
1986
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
1987
		printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
L
Linus Torvalds 已提交
1988 1989
#endif

1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001
		/* 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
2002

2003
		spin_unlock_irqrestore(&card->card_lock, flags);
L
Linus Torvalds 已提交
2004 2005 2006
	}

#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2007
	printk(KERN_DEBUG "cyc startup done\n");
L
Linus Torvalds 已提交
2008 2009 2010 2011
#endif
	return 0;

errout:
2012
	spin_unlock_irqrestore(&card->card_lock, flags);
L
Linus Torvalds 已提交
2013
	return retval;
2014
}				/* startup */
L
Linus Torvalds 已提交
2015

2016
static void start_xmit(struct cyclades_port *info)
L
Linus Torvalds 已提交
2017
{
2018
	struct cyclades_card *card;
2019 2020
	unsigned long flags;
	void __iomem *base_addr;
2021
	int chip, channel, index;
L
Linus Torvalds 已提交
2022

2023
	card = info->card;
2024 2025
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
2026 2027
		chip = channel >> 2;
		channel &= 0x03;
2028 2029
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2030

2031
		spin_lock_irqsave(&card->card_lock, flags);
2032 2033
		cy_writeb(base_addr + (CyCAR << index), channel);
		cy_writeb(base_addr + (CySRER << index),
2034
			readb(base_addr + (CySRER << index)) | CyTxRdy);
2035
		spin_unlock_irqrestore(&card->card_lock, flags);
2036
	} else {
L
Linus Torvalds 已提交
2037
#ifdef CONFIG_CYZ_INTR
2038
		int retval;
L
Linus Torvalds 已提交
2039

2040
		spin_lock_irqsave(&card->card_lock, flags);
2041
		retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2042
		if (retval != 0) {
J
Jiri Slaby 已提交
2043 2044
			printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
				"%x\n", info->line, retval);
2045
		}
2046
		spin_unlock_irqrestore(&card->card_lock, flags);
2047 2048 2049 2050 2051
#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
2052 2053 2054 2055 2056

/*
 * This routine shuts down a serial port; interrupts are disabled,
 * and DTR is dropped if the hangup on close termio flag is on.
 */
2057
static void shutdown(struct cyclades_port *info)
L
Linus Torvalds 已提交
2058
{
2059
	struct cyclades_card *card;
2060 2061
	unsigned long flags;
	void __iomem *base_addr;
2062
	int chip, channel, index;
2063 2064 2065 2066 2067 2068

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

	card = info->card;
2069 2070
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
2071 2072
		chip = channel >> 2;
		channel &= 0x03;
2073 2074
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
2075 2076

#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2077 2078 2079
		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
2080 2081
#endif

2082
		spin_lock_irqsave(&card->card_lock, flags);
2083 2084 2085

		/* Clear delta_msr_wait queue to avoid mem leaks. */
		wake_up_interruptible(&info->delta_msr_wait);
L
Linus Torvalds 已提交
2086

2087 2088 2089 2090 2091 2092 2093 2094 2095 2096
		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
2097
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
2098 2099
			printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2100 2101
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
2102
#endif
2103 2104 2105 2106 2107 2108 2109 2110 2111
		}
		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;
2112
		spin_unlock_irqrestore(&card->card_lock, flags);
2113 2114 2115 2116 2117 2118 2119
	} 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;

2120
		base_addr = card->base_addr;
L
Linus Torvalds 已提交
2121
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2122 2123
		printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
			"base_addr %p\n", card, channel, base_addr);
L
Linus Torvalds 已提交
2124 2125
#endif

2126
		firm_id = base_addr + ID_ADDRESS;
2127
		if (!ISZLOADED(*card)) {
2128 2129
			return;
		}
L
Linus Torvalds 已提交
2130

2131
		zfw_ctrl = card->base_addr +
2132
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
2133 2134
		board_ctrl = &zfw_ctrl->board_ctrl;
		ch_ctrl = zfw_ctrl->ch_ctrl;
L
Linus Torvalds 已提交
2135

2136
		spin_lock_irqsave(&card->card_lock, flags);
L
Linus Torvalds 已提交
2137

2138 2139 2140 2141 2142
		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
2143
		}
2144 2145 2146

		if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
			cy_writel(&ch_ctrl[channel].rs_control,
2147
				(__u32)(readl(&ch_ctrl[channel].rs_control) &
2148
					~(C_RS_RTS | C_RS_DTR)));
2149
			retval = cyz_issue_cmd(info->card, channel,
2150 2151
					C_CM_IOCTLM, 0L);
			if (retval != 0) {
J
Jiri Slaby 已提交
2152 2153
				printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
					"was %x\n", info->line, retval);
2154
			}
L
Linus Torvalds 已提交
2155
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
2156
			printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
L
Linus Torvalds 已提交
2157
#endif
2158
		}
L
Linus Torvalds 已提交
2159

2160 2161 2162 2163 2164
		if (info->tty) {
			set_bit(TTY_IO_ERROR, &info->tty->flags);
		}
		info->flags &= ~ASYNC_INITIALIZED;

2165
		spin_unlock_irqrestore(&card->card_lock, flags);
2166
	}
L
Linus Torvalds 已提交
2167 2168

#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2169
	printk(KERN_DEBUG "cyc shutdown done\n");
L
Linus Torvalds 已提交
2170
#endif
2171
}				/* shutdown */
L
Linus Torvalds 已提交
2172 2173 2174 2175 2176 2177 2178 2179

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

static int
2180 2181
block_til_ready(struct tty_struct *tty, struct file *filp,
		struct cyclades_port *info)
L
Linus Torvalds 已提交
2182
{
2183 2184 2185 2186 2187 2188 2189
	DECLARE_WAITQUEUE(wait, current);
	struct cyclades_card *cinfo;
	unsigned long flags;
	int chip, channel, index;
	int retval;
	void __iomem *base_addr;

2190
	cinfo = info->card;
2191 2192 2193 2194 2195 2196 2197
	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
2198 2199
		wait_event_interruptible(info->close_wait,
				!(info->flags & ASYNC_CLOSING));
J
Jiri Slaby 已提交
2200
		return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
L
Linus Torvalds 已提交
2201
	}
2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220

	/*
	 * 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
2221
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2222 2223
	printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
		"count = %d\n", info->line, info->count);
L
Linus Torvalds 已提交
2224
#endif
2225
	spin_lock_irqsave(&cinfo->card_lock, flags);
2226 2227
	if (!tty_hung_up_p(filp))
		info->count--;
2228
	spin_unlock_irqrestore(&cinfo->card_lock, flags);
L
Linus Torvalds 已提交
2229
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2230 2231
	printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
		"%d\n", current->pid, info->count);
L
Linus Torvalds 已提交
2232
#endif
2233 2234 2235 2236 2237 2238 2239 2240 2241
	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) {
2242
			spin_lock_irqsave(&cinfo->card_lock, flags);
2243 2244 2245 2246 2247 2248 2249
			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
2250
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
2251 2252 2253
				printk(KERN_DEBUG "cyc:block_til_ready raising "
					"DTR\n");
				printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2254 2255
					readb(base_addr + (CyMSVR1 << index)),
					readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
2256
#endif
2257
			}
2258
			spin_unlock_irqrestore(&cinfo->card_lock, flags);
L
Linus Torvalds 已提交
2259

2260 2261 2262 2263 2264 2265 2266
			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
2267

2268
			spin_lock_irqsave(&cinfo->card_lock, flags);
2269 2270 2271
			cy_writeb(base_addr + (CyCAR << index),
				  (u_char) channel);
			if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2272
					(readb(base_addr +
2273
						(CyMSVR1 << index)) & CyDCD))) {
2274
				spin_unlock_irqrestore(&cinfo->card_lock, flags);
2275 2276
				break;
			}
2277
			spin_unlock_irqrestore(&cinfo->card_lock, flags);
L
Linus Torvalds 已提交
2278

2279 2280 2281 2282
			if (signal_pending(current)) {
				retval = -ERESTARTSYS;
				break;
			}
L
Linus Torvalds 已提交
2283
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2284 2285 2286
			printk(KERN_DEBUG "cyc block_til_ready blocking: "
				"ttyC%d, count = %d\n",
				info->line, info->count);
L
Linus Torvalds 已提交
2287
#endif
2288
			schedule();
L
Linus Torvalds 已提交
2289
		}
2290 2291 2292 2293 2294 2295 2296 2297 2298
	} 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;

		base_addr = cinfo->base_addr;
		firm_id = base_addr + ID_ADDRESS;
		if (!ISZLOADED(*cinfo)) {
2299
			__set_current_state(TASK_RUNNING);
2300 2301 2302 2303
			remove_wait_queue(&info->open_wait, &wait);
			return -EINVAL;
		}

2304
		zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2305 2306 2307 2308 2309 2310
		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,
2311 2312
					readl(&ch_ctrl[channel].rs_control) |
					C_RS_RTS | C_RS_DTR);
2313
				retval = cyz_issue_cmd(cinfo,
2314
					channel, C_CM_IOCTLM, 0L);
2315
				if (retval != 0) {
J
Jiri Slaby 已提交
2316 2317
					printk(KERN_ERR "cyc:block_til_ready "
						"retval on ttyC%d was %x\n",
2318 2319
						info->line, retval);
				}
L
Linus Torvalds 已提交
2320
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
2321 2322
				printk(KERN_DEBUG "cyc:block_til_ready raising "
					"Z DTR\n");
L
Linus Torvalds 已提交
2323
#endif
2324
			}
L
Linus Torvalds 已提交
2325

2326 2327 2328 2329 2330 2331 2332 2333
			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) ||
2334
					(readl(&ch_ctrl[channel].rs_status) &
2335 2336 2337 2338 2339 2340 2341
						C_RS_DCD))) {
				break;
			}
			if (signal_pending(current)) {
				retval = -ERESTARTSYS;
				break;
			}
L
Linus Torvalds 已提交
2342
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2343 2344 2345
			printk(KERN_DEBUG "cyc block_til_ready blocking: "
				"ttyC%d, count = %d\n",
				info->line, info->count);
L
Linus Torvalds 已提交
2346
#endif
2347 2348
			schedule();
		}
L
Linus Torvalds 已提交
2349
	}
2350
	__set_current_state(TASK_RUNNING);
2351 2352 2353
	remove_wait_queue(&info->open_wait, &wait);
	if (!tty_hung_up_p(filp)) {
		info->count++;
L
Linus Torvalds 已提交
2354
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2355 2356
		printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
			"count to %d\n", current->pid, info->count);
L
Linus Torvalds 已提交
2357
#endif
2358 2359
	}
	info->blocked_open--;
L
Linus Torvalds 已提交
2360
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2361 2362
	printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
		"count = %d\n", info->line, info->count);
L
Linus Torvalds 已提交
2363
#endif
2364 2365 2366 2367 2368
	if (retval)
		return retval;
	info->flags |= ASYNC_NORMAL_ACTIVE;
	return 0;
}				/* block_til_ready */
L
Linus Torvalds 已提交
2369 2370 2371 2372 2373

/*
 * This routine is called whenever a serial port is opened.  It
 * performs the serial-specific initialization for the tty structure.
 */
2374
static int cy_open(struct tty_struct *tty, struct file *filp)
L
Linus Torvalds 已提交
2375
{
2376
	struct cyclades_port *info;
J
Jiri Slaby 已提交
2377 2378
	unsigned int i, line;
	int retval;
L
Linus Torvalds 已提交
2379

2380
	line = tty->index;
J
Jiri Slaby 已提交
2381
	if ((tty->index < 0) || (NR_PORTS <= line)) {
2382 2383
		return -ENODEV;
	}
J
Jiri Slaby 已提交
2384 2385 2386 2387 2388 2389 2390
	for (i = 0; i < NR_CARDS; i++)
		if (line < cy_card[i].first_line + cy_card[i].nports &&
				line >= cy_card[i].first_line)
			break;
	if (i >= NR_CARDS)
		return -ENODEV;
	info = &cy_card[i].ports[line - cy_card[i].first_line];
2391 2392 2393
	if (info->line < 0) {
		return -ENODEV;
	}
L
Linus Torvalds 已提交
2394

2395 2396 2397 2398
	/* If the card's firmware hasn't been loaded,
	   treat it as absent from the system.  This
	   will make the user pay attention.
	 */
2399 2400
	if (IS_CYC_Z(*info->card)) {
		struct cyclades_card *cinfo = info->card;
2401 2402 2403
		struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;

		if (!ISZLOADED(*cinfo)) {
2404
			if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2405 2406
					 (cinfo->ctl_addr))->mail_box_0)) &&
					Z_FPGA_CHECK(*cinfo)) &&
2407
					(ZFIRM_HLT == readl(
2408
						&firm_id->signature))) {
J
Jiri Slaby 已提交
2409 2410 2411 2412
				printk(KERN_ERR "cyc:Cyclades-Z Error: you "
					"need an external power supply for "
					"this number of ports.\nFirmware "
					"halted.\n");
2413
			} else {
J
Jiri Slaby 已提交
2414 2415
				printk(KERN_ERR "cyc:Cyclades-Z firmware not "
					"yet loaded\n");
2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428
			}
			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 +
2429 2430
					(readl(&firm_id->zfwctrl_addr) &
					 0xfffff);
2431 2432 2433 2434 2435

				board_ctrl = &zfw_ctrl->board_ctrl;

				/* Enable interrupts on the PLX chip */
				cy_writew(cinfo->ctl_addr + 0x68,
2436
					readw(cinfo->ctl_addr + 0x68) | 0x0900);
2437 2438 2439 2440
				/* 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
2441 2442
					printk(KERN_ERR "cyc:IRQ enable retval "
						"was %x\n", retval);
2443 2444
				}
				cinfo->nports =
2445
					(int)readl(&board_ctrl->n_channel);
2446 2447
				cinfo->intr_enabled = 1;
			}
L
Linus Torvalds 已提交
2448
		}
2449 2450 2451 2452
#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
2453 2454
	}
#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
2455
	printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2456
#endif
2457 2458 2459 2460 2461
	tty->driver_data = info;
	info->tty = tty;
	if (serial_paranoia_check(info, tty->name, "cy_open")) {
		return -ENODEV;
	}
L
Linus Torvalds 已提交
2462
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2463 2464
	printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
			info->count);
L
Linus Torvalds 已提交
2465
#endif
2466
	info->count++;
L
Linus Torvalds 已提交
2467
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2468
	printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2469
		current->pid, info->count);
L
Linus Torvalds 已提交
2470 2471
#endif

2472 2473 2474 2475
	/*
	 * 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
2476 2477
		wait_event_interruptible(info->close_wait,
				!(info->flags & ASYNC_CLOSING));
J
Jiri Slaby 已提交
2478
		return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2479
	}
L
Linus Torvalds 已提交
2480

2481 2482 2483 2484 2485 2486 2487
	/*
	 * Start up serial port
	 */
	retval = startup(info);
	if (retval) {
		return retval;
	}
L
Linus Torvalds 已提交
2488

2489 2490
	retval = block_til_ready(tty, filp, info);
	if (retval) {
L
Linus Torvalds 已提交
2491
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2492 2493
		printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
			"with %d\n", retval);
L
Linus Torvalds 已提交
2494
#endif
2495 2496
		return retval;
	}
L
Linus Torvalds 已提交
2497

2498
	info->throttle = 0;
L
Linus Torvalds 已提交
2499

2500
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2501
	printk(KERN_DEBUG "cyc:cy_open done\n");
2502 2503 2504
#endif
	return 0;
}				/* cy_open */
L
Linus Torvalds 已提交
2505 2506 2507 2508

/*
 * cy_wait_until_sent() --- wait until the transmitter is empty
 */
2509
static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
L
Linus Torvalds 已提交
2510
{
2511
	struct cyclades_card *card;
2512
	struct cyclades_port *info = tty->driver_data;
2513
	void __iomem *base_addr;
2514
	int chip, channel, index;
2515 2516 2517 2518 2519 2520 2521 2522
	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
2523

2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551
	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
2552
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
J
Jiri Slaby 已提交
2553 2554
	printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
		timeout, char_time, jiffies);
L
Linus Torvalds 已提交
2555
#endif
2556
	card = info->card;
2557 2558
	channel = (info->line) - (card->first_line);
	if (!IS_CYC_Z(*card)) {
2559 2560
		chip = channel >> 2;
		channel &= 0x03;
2561 2562
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2563
		while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
L
Linus Torvalds 已提交
2564
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
J
Jiri Slaby 已提交
2565
			printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
L
Linus Torvalds 已提交
2566
#endif
2567 2568 2569 2570 2571 2572
			if (msleep_interruptible(jiffies_to_msecs(char_time)))
				break;
			if (timeout && time_after(jiffies, orig_jiffies +
					timeout))
				break;
		}
L
Linus Torvalds 已提交
2573
	}
2574 2575
	/* Run one more char cycle */
	msleep_interruptible(jiffies_to_msecs(char_time * 5));
L
Linus Torvalds 已提交
2576
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
J
Jiri Slaby 已提交
2577
	printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
L
Linus Torvalds 已提交
2578 2579 2580 2581 2582 2583
#endif
}

/*
 * This routine is called when a particular tty device is closed.
 */
2584
static void cy_close(struct tty_struct *tty, struct file *filp)
L
Linus Torvalds 已提交
2585
{
2586
	struct cyclades_port *info = tty->driver_data;
2587
	struct cyclades_card *card;
2588
	unsigned long flags;
L
Linus Torvalds 已提交
2589 2590

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
2591
	printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2592 2593
#endif

2594 2595 2596
	if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
		return;
	}
L
Linus Torvalds 已提交
2597

2598 2599 2600
	card = info->card;

	spin_lock_irqsave(&card->card_lock, flags);
2601 2602
	/* If the TTY is being hung up, nothing to do */
	if (tty_hung_up_p(filp)) {
2603
		spin_unlock_irqrestore(&card->card_lock, flags);
2604 2605
		return;
	}
L
Linus Torvalds 已提交
2606
#ifdef CY_DEBUG_OPEN
J
Jiri Slaby 已提交
2607 2608
	printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
		info->count);
L
Linus Torvalds 已提交
2609
#endif
2610 2611 2612 2613 2614 2615 2616 2617
	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
2618 2619
		printk(KERN_ERR "cyc:cy_close: bad serial port count; "
			"tty->count is 1, info->count is %d\n", info->count);
2620 2621
		info->count = 1;
	}
L
Linus Torvalds 已提交
2622
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2623
	printk(KERN_DEBUG  "cyc:cy_close at (%d): decrementing count to %d\n",
2624
		current->pid, info->count - 1);
L
Linus Torvalds 已提交
2625
#endif
2626
	if (--info->count < 0) {
L
Linus Torvalds 已提交
2627
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
2628
		printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
L
Linus Torvalds 已提交
2629
#endif
2630
		info->count = 0;
L
Linus Torvalds 已提交
2631
	}
2632
	if (info->count) {
2633
		spin_unlock_irqrestore(&card->card_lock, flags);
2634 2635 2636
		return;
	}
	info->flags |= ASYNC_CLOSING;
L
Linus Torvalds 已提交
2637

2638 2639 2640 2641 2642
	/*
	 * Now we wait for the transmit buffer to clear; and we notify
	 * the line discipline to only process XON/XOFF characters.
	 */
	tty->closing = 1;
2643
	spin_unlock_irqrestore(&card->card_lock, flags);
2644 2645
	if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
		tty_wait_until_sent(tty, info->closing_wait);
L
Linus Torvalds 已提交
2646
	}
2647
	spin_lock_irqsave(&card->card_lock, flags);
2648

2649 2650 2651 2652
	if (!IS_CYC_Z(*card)) {
		int channel = info->line - card->first_line;
		int index = card->bus_index;
		void __iomem *base_addr = card->base_addr +
2653 2654 2655 2656 2657
			(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),
2658
			  readb(base_addr + (CySRER << index)) & ~CyRxData);
2659 2660 2661
		if (info->flags & ASYNC_INITIALIZED) {
			/* Waiting for on-board buffers to be empty before closing
			   the port */
2662
			spin_unlock_irqrestore(&card->card_lock, flags);
2663
			cy_wait_until_sent(tty, info->timeout);
2664
			spin_lock_irqsave(&card->card_lock, flags);
2665 2666 2667 2668
		}
	} else {
#ifdef Z_WAKE
		/* Waiting for on-board buffers to be empty before closing the port */
2669
		void __iomem *base_addr = card->base_addr;
2670 2671
		struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
		struct ZFW_CTRL __iomem *zfw_ctrl =
2672
		    base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2673
		struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2674
		int channel = info->line - card->first_line;
2675 2676
		int retval;

2677
		if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2678
			retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2679
			if (retval != 0) {
J
Jiri Slaby 已提交
2680 2681
				printk(KERN_DEBUG "cyc:cy_close retval on "
					"ttyC%d was %x\n", info->line, retval);
2682
			}
2683
			spin_unlock_irqrestore(&card->card_lock, flags);
J
Jiri Slaby 已提交
2684
			wait_for_completion_interruptible(&info->shutdown_wait);
2685
			spin_lock_irqsave(&card->card_lock, flags);
2686
		}
L
Linus Torvalds 已提交
2687
#endif
2688 2689
	}

2690
	spin_unlock_irqrestore(&card->card_lock, flags);
2691 2692 2693 2694
	shutdown(info);
	if (tty->driver->flush_buffer)
		tty->driver->flush_buffer(tty);
	tty_ldisc_flush(tty);
2695
	spin_lock_irqsave(&card->card_lock, flags);
2696 2697 2698 2699

	tty->closing = 0;
	info->tty = NULL;
	if (info->blocked_open) {
2700
		spin_unlock_irqrestore(&card->card_lock, flags);
2701 2702 2703 2704 2705
		if (info->close_delay) {
			msleep_interruptible(jiffies_to_msecs
						(info->close_delay));
		}
		wake_up_interruptible(&info->open_wait);
2706
		spin_lock_irqsave(&card->card_lock, flags);
2707 2708 2709
	}
	info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
	wake_up_interruptible(&info->close_wait);
L
Linus Torvalds 已提交
2710 2711

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
2712
	printk(KERN_DEBUG "cyc:cy_close done\n");
L
Linus Torvalds 已提交
2713 2714
#endif

2715
	spin_unlock_irqrestore(&card->card_lock, flags);
2716
}				/* cy_close */
L
Linus Torvalds 已提交
2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730

/* 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.
 *
 */
2731
static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
L
Linus Torvalds 已提交
2732
{
2733
	struct cyclades_port *info = tty->driver_data;
2734 2735
	unsigned long flags;
	int c, ret = 0;
L
Linus Torvalds 已提交
2736 2737

#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2738
	printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2739 2740
#endif

2741 2742 2743
	if (serial_paranoia_check(info, tty->name, "cy_write")) {
		return 0;
	}
L
Linus Torvalds 已提交
2744

2745 2746
	if (!info->xmit_buf)
		return 0;
L
Linus Torvalds 已提交
2747

2748
	spin_lock_irqsave(&info->card->card_lock, flags);
2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763
	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;
	}
2764
	spin_unlock_irqrestore(&info->card->card_lock, flags);
2765 2766 2767 2768 2769 2770 2771 2772 2773

	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
2774 2775 2776 2777 2778 2779 2780 2781

/*
 * 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.
 */
2782
static void cy_put_char(struct tty_struct *tty, unsigned char ch)
L
Linus Torvalds 已提交
2783
{
2784
	struct cyclades_port *info = tty->driver_data;
2785
	unsigned long flags;
L
Linus Torvalds 已提交
2786 2787

#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2788
	printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2789 2790
#endif

2791 2792
	if (serial_paranoia_check(info, tty->name, "cy_put_char"))
		return;
L
Linus Torvalds 已提交
2793

2794 2795
	if (!info->xmit_buf)
		return;
L
Linus Torvalds 已提交
2796

2797
	spin_lock_irqsave(&info->card->card_lock, flags);
J
Jiri Slaby 已提交
2798
	if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2799
		spin_unlock_irqrestore(&info->card->card_lock, flags);
2800 2801
		return;
	}
L
Linus Torvalds 已提交
2802

2803 2804 2805
	info->xmit_buf[info->xmit_head++] = ch;
	info->xmit_head &= SERIAL_XMIT_SIZE - 1;
	info->xmit_cnt++;
L
Linus Torvalds 已提交
2806 2807
	info->idle_stats.xmit_bytes++;
	info->idle_stats.xmit_idle = jiffies;
2808
	spin_unlock_irqrestore(&info->card->card_lock, flags);
2809
}				/* cy_put_char */
L
Linus Torvalds 已提交
2810 2811 2812 2813 2814

/*
 * This routine is called by the kernel after it has written a
 * series of characters to the tty device using put_char().  
 */
2815
static void cy_flush_chars(struct tty_struct *tty)
L
Linus Torvalds 已提交
2816
{
2817
	struct cyclades_port *info = tty->driver_data;
2818

L
Linus Torvalds 已提交
2819
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2820
	printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2821 2822
#endif

2823 2824
	if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
		return;
L
Linus Torvalds 已提交
2825

2826 2827 2828
	if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
			!info->xmit_buf)
		return;
L
Linus Torvalds 已提交
2829

2830 2831
	start_xmit(info);
}				/* cy_flush_chars */
L
Linus Torvalds 已提交
2832 2833 2834 2835 2836 2837 2838

/*
 * 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.
 */
2839
static int cy_write_room(struct tty_struct *tty)
L
Linus Torvalds 已提交
2840
{
2841
	struct cyclades_port *info = tty->driver_data;
2842 2843
	int ret;

L
Linus Torvalds 已提交
2844
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2845
	printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
L
Linus Torvalds 已提交
2846 2847
#endif

2848 2849 2850 2851 2852 2853 2854
	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
2855

2856
static int cy_chars_in_buffer(struct tty_struct *tty)
L
Linus Torvalds 已提交
2857
{
2858
	struct cyclades_card *card;
2859
	struct cyclades_port *info = tty->driver_data;
2860
	int channel;
L
Linus Torvalds 已提交
2861

2862 2863 2864 2865
	if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
		return 0;

	card = info->card;
2866
	channel = (info->line) - (card->first_line);
L
Linus Torvalds 已提交
2867 2868

#ifdef Z_EXT_CHARS_IN_BUFFER
2869 2870
	if (!IS_CYC_Z(cy_card[card])) {
#endif				/* Z_EXT_CHARS_IN_BUFFER */
L
Linus Torvalds 已提交
2871
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2872 2873
		printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
			info->line, info->xmit_cnt);
L
Linus Torvalds 已提交
2874
#endif
2875
		return info->xmit_cnt;
L
Linus Torvalds 已提交
2876
#ifdef Z_EXT_CHARS_IN_BUFFER
2877
	} else {
J
Jiri Slaby 已提交
2878 2879 2880 2881
		static struct FIRM_ID *firm_id;
		static struct ZFW_CTRL *zfw_ctrl;
		static struct CH_CTRL *ch_ctrl;
		static struct BUF_CTRL *buf_ctrl;
2882
		int char_count;
J
Jiri Slaby 已提交
2883
		__u32 tx_put, tx_get, tx_bufsize;
2884

2885 2886
		firm_id = card->base_addr + ID_ADDRESS;
		zfw_ctrl = card->base_addr +
2887
			(readl(&firm_id->zfwctrl_addr) & 0xfffff);
2888 2889 2890
		ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
		buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);

2891 2892 2893
		tx_get = readl(&buf_ctrl->tx_get);
		tx_put = readl(&buf_ctrl->tx_put);
		tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2894 2895 2896 2897
		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
2898
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
2899 2900
		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
2901
#endif
J
Jiri Slaby 已提交
2902
		return info->xmit_cnt + char_count;
2903 2904 2905
	}
#endif				/* Z_EXT_CHARS_IN_BUFFER */
}				/* cy_chars_in_buffer */
L
Linus Torvalds 已提交
2906 2907 2908 2909 2910 2911 2912

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

K
Klaus Kudielka 已提交
2913
static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
L
Linus Torvalds 已提交
2914
{
2915
	int co, co_val, bpr;
K
Klaus Kudielka 已提交
2916
	__u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2917
			25000000);
L
Linus Torvalds 已提交
2918

2919 2920 2921 2922
	if (baud == 0) {
		info->tbpr = info->tco = info->rbpr = info->rco = 0;
		return;
	}
L
Linus Torvalds 已提交
2923

2924 2925 2926 2927 2928
	/* 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
2929

2930 2931 2932
	bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
	if (bpr > 255)
		bpr = 255;
L
Linus Torvalds 已提交
2933

2934 2935
	info->tbpr = info->rbpr = bpr;
	info->tco = info->rco = co;
L
Linus Torvalds 已提交
2936 2937 2938 2939 2940 2941
}

/*
 * This routine finds or computes the various line characteristics.
 * It used to be called config_setup
 */
2942
static void set_line_char(struct cyclades_port *info)
L
Linus Torvalds 已提交
2943
{
2944
	struct cyclades_card *card;
2945 2946
	unsigned long flags;
	void __iomem *base_addr;
2947
	int chip, channel, index;
2948 2949 2950 2951 2952 2953 2954
	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
2955
	}
2956 2957
	if (info->line == -1) {
		return;
L
Linus Torvalds 已提交
2958
	}
2959 2960
	cflag = info->tty->termios->c_cflag;
	iflag = info->tty->termios->c_iflag;
L
Linus Torvalds 已提交
2961

2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973
	/*
	 * 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
2974
	}
2975 2976

	card = info->card;
2977
	channel = info->line - card->first_line;
2978 2979
	chip_number = channel / 4;

2980
	if (!IS_CYC_Z(*card)) {
2981

2982
		index = card->bus_index;
2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086

		/* 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
3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097

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

3098 3099
		chip = channel >> 2;
		channel &= 0x03;
3100
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
3101

3102
		spin_lock_irqsave(&card->card_lock, flags);
3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133
		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),
3134
				readb(base_addr + (CySRER << index)) | CyMdmCh);
3135 3136 3137 3138 3139 3140 3141 3142 3143 3144
			/* 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
3145
		} else {
3146 3147
			/* without modem intr */
			cy_writeb(base_addr + (CySRER << index),
3148
				  readb(base_addr +
3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161
					   (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
3162
		}
3163 3164 3165 3166 3167 3168 3169 3170 3171

		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
3172
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3173 3174
			printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3175 3176
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3177
#endif
3178 3179 3180 3181 3182 3183 3184 3185
		} 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
3186
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3187 3188
			printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3189 3190
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3191
#endif
3192
		}
L
Linus Torvalds 已提交
3193

3194 3195 3196
		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
3197
		spin_unlock_irqrestore(&card->card_lock, flags);
L
Linus Torvalds 已提交
3198 3199

	} else {
3200 3201 3202 3203 3204
		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
3205
		__u32 sw_flow;
3206
		int retval;
L
Linus Torvalds 已提交
3207

3208 3209
		firm_id = card->base_addr + ID_ADDRESS;
		if (!ISZLOADED(*card)) {
3210 3211
			return;
		}
L
Linus Torvalds 已提交
3212

3213
		zfw_ctrl = card->base_addr +
3214
			(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246
		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
3247

3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264
		/* 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,
3265
				  readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3266 3267
		} else {
			cy_writel(&ch_ctrl->comm_data_l,
3268
				  readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3269 3270 3271 3272 3273 3274 3275 3276 3277 3278
		}
		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
3279

3280 3281 3282
		/* CTS flow control flag */
		if (cflag & CRTSCTS) {
			cy_writel(&ch_ctrl->hw_flow,
3283
				readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3284
		} else {
3285 3286
			cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
					~(C_RS_CTS | C_RS_RTS));
3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300
		}
		/* 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);

3301
		retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3302
		if (retval != 0) {
J
Jiri Slaby 已提交
3303 3304
			printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
				"was %x\n", info->line, retval);
3305 3306 3307 3308 3309 3310 3311 3312
		}

		/* CD sensitivity */
		if (cflag & CLOCAL) {
			info->flags &= ~ASYNC_CHECK_CD;
		} else {
			info->flags |= ASYNC_CHECK_CD;
		}
L
Linus Torvalds 已提交
3313

3314 3315
		if (baud == 0) {	/* baud rate is zero, turn off line */
			cy_writel(&ch_ctrl->rs_control,
3316
				  readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
L
Linus Torvalds 已提交
3317
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3318
			printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
L
Linus Torvalds 已提交
3319
#endif
3320 3321
		} else {
			cy_writel(&ch_ctrl->rs_control,
3322
				  readl(&ch_ctrl->rs_control) | C_RS_DTR);
L
Linus Torvalds 已提交
3323
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3324
			printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
L
Linus Torvalds 已提交
3325
#endif
3326
		}
L
Linus Torvalds 已提交
3327

3328
		retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3329
		if (retval != 0) {
J
Jiri Slaby 已提交
3330 3331
			printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
				"was %x\n", info->line, retval);
3332
		}
L
Linus Torvalds 已提交
3333

3334 3335 3336
		if (info->tty) {
			clear_bit(TTY_IO_ERROR, &info->tty->flags);
		}
L
Linus Torvalds 已提交
3337
	}
3338
}				/* set_line_char */
L
Linus Torvalds 已提交
3339 3340

static int
3341 3342
get_serial_info(struct cyclades_port *info,
		struct serial_struct __user * retinfo)
L
Linus Torvalds 已提交
3343
{
3344
	struct serial_struct tmp;
3345
	struct cyclades_card *cinfo = info->card;
L
Linus Torvalds 已提交
3346

3347 3348 3349 3350 3351
	if (!retinfo)
		return -EFAULT;
	memset(&tmp, 0, sizeof(tmp));
	tmp.type = info->type;
	tmp.line = info->line;
3352 3353
	tmp.port = (info->card - cy_card) * 0x100 + info->line -
		cinfo->first_line;
3354 3355 3356
	tmp.irq = cinfo->irq;
	tmp.flags = info->flags;
	tmp.close_delay = info->close_delay;
3357
	tmp.closing_wait = info->closing_wait;
3358 3359 3360 3361 3362
	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
3363 3364

static int
3365 3366
set_serial_info(struct cyclades_port *info,
		struct serial_struct __user * new_info)
L
Linus Torvalds 已提交
3367
{
3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399
	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
3400 3401

check_and_exit:
3402 3403 3404 3405 3406 3407 3408
	if (info->flags & ASYNC_INITIALIZED) {
		set_line_char(info);
		return 0;
	} else {
		return startup(info);
	}
}				/* set_serial_info */
L
Linus Torvalds 已提交
3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419

/*
 * 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.
 */
3420
static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
L
Linus Torvalds 已提交
3421
{
3422 3423
	struct cyclades_card *card;
	int chip, channel, index;
3424 3425 3426 3427
	unsigned char status;
	unsigned int result;
	unsigned long flags;
	void __iomem *base_addr;
L
Linus Torvalds 已提交
3428

3429
	card = info->card;
3430 3431
	channel = (info->line) - (card->first_line);
	if (!IS_CYC_Z(*card)) {
3432 3433
		chip = channel >> 2;
		channel &= 0x03;
3434 3435
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3436

3437
		spin_lock_irqsave(&card->card_lock, flags);
3438
		status = readb(base_addr + (CySRER << index)) &
3439
				(CyTxRdy | CyTxMpty);
3440
		spin_unlock_irqrestore(&card->card_lock, flags);
3441 3442 3443 3444 3445 3446
		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
3447 3448
}

3449
static int cy_tiocmget(struct tty_struct *tty, struct file *file)
L
Linus Torvalds 已提交
3450
{
3451
	struct cyclades_port *info = tty->driver_data;
3452 3453
	struct cyclades_card *card;
	int chip, channel, index;
3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465
	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
3466

3467
	card = info->card;
3468 3469
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
3470 3471
		chip = channel >> 2;
		channel &= 0x03;
3472 3473
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
3474

3475
		spin_lock_irqsave(&card->card_lock, flags);
3476
		cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3477 3478
		status = readb(base_addr + (CyMSVR1 << index));
		status |= readb(base_addr + (CyMSVR2 << index));
3479
		spin_unlock_irqrestore(&card->card_lock, flags);
3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491

		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
3492
	} else {
3493 3494 3495 3496
		base_addr = card->base_addr;
		firm_id = card->base_addr + ID_ADDRESS;
		if (ISZLOADED(*card)) {
			zfw_ctrl = card->base_addr +
3497
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3498 3499
			board_ctrl = &zfw_ctrl->board_ctrl;
			ch_ctrl = zfw_ctrl->ch_ctrl;
3500
			lstatus = readl(&ch_ctrl[channel].rs_status);
3501 3502 3503 3504 3505 3506 3507 3508 3509 3510
			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
3511

3512 3513 3514
	}
	return result;
}				/* cy_tiomget */
L
Linus Torvalds 已提交
3515 3516 3517

static int
cy_tiocmset(struct tty_struct *tty, struct file *file,
3518
		unsigned int set, unsigned int clear)
L
Linus Torvalds 已提交
3519
{
3520
	struct cyclades_port *info = tty->driver_data;
3521 3522
	struct cyclades_card *card;
	int chip, channel, index;
3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534
	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;
3535 3536
	channel = (info->line) - (card->first_line);
	if (!IS_CYC_Z(*card)) {
3537 3538
		chip = channel >> 2;
		channel &= 0x03;
3539 3540
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3541 3542

		if (set & TIOCM_RTS) {
3543
			spin_lock_irqsave(&card->card_lock, flags);
3544 3545 3546 3547 3548 3549 3550 3551 3552
			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);
			}
3553
			spin_unlock_irqrestore(&card->card_lock, flags);
3554 3555
		}
		if (clear & TIOCM_RTS) {
3556
			spin_lock_irqsave(&card->card_lock, flags);
3557 3558 3559 3560 3561 3562 3563 3564 3565
			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);
			}
3566
			spin_unlock_irqrestore(&card->card_lock, flags);
3567 3568
		}
		if (set & TIOCM_DTR) {
3569
			spin_lock_irqsave(&card->card_lock, flags);
3570 3571 3572 3573 3574 3575 3576 3577 3578
			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
3579
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3580 3581
			printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3582 3583
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3584
#endif
3585
			spin_unlock_irqrestore(&card->card_lock, flags);
3586 3587
		}
		if (clear & TIOCM_DTR) {
3588
			spin_lock_irqsave(&card->card_lock, flags);
3589 3590 3591 3592 3593 3594 3595 3596 3597
			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
3598 3599

#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3600 3601
			printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
			printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3602 3603
				readb(base_addr + (CyMSVR1 << index)),
				readb(base_addr + (CyMSVR2 << index)));
L
Linus Torvalds 已提交
3604
#endif
3605
			spin_unlock_irqrestore(&card->card_lock, flags);
3606 3607
		}
	} else {
3608
		base_addr = card->base_addr;
3609

3610 3611 3612
		firm_id = card->base_addr + ID_ADDRESS;
		if (ISZLOADED(*card)) {
			zfw_ctrl = card->base_addr +
3613
				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
3614 3615 3616 3617
			board_ctrl = &zfw_ctrl->board_ctrl;
			ch_ctrl = zfw_ctrl->ch_ctrl;

			if (set & TIOCM_RTS) {
3618
				spin_lock_irqsave(&card->card_lock, flags);
3619
				cy_writel(&ch_ctrl[channel].rs_control,
3620 3621
					readl(&ch_ctrl[channel].rs_control) |
					C_RS_RTS);
3622
				spin_unlock_irqrestore(&card->card_lock, flags);
3623 3624
			}
			if (clear & TIOCM_RTS) {
3625
				spin_lock_irqsave(&card->card_lock, flags);
3626
				cy_writel(&ch_ctrl[channel].rs_control,
3627 3628
					readl(&ch_ctrl[channel].rs_control) &
					~C_RS_RTS);
3629
				spin_unlock_irqrestore(&card->card_lock, flags);
3630 3631
			}
			if (set & TIOCM_DTR) {
3632
				spin_lock_irqsave(&card->card_lock, flags);
3633
				cy_writel(&ch_ctrl[channel].rs_control,
3634 3635
					readl(&ch_ctrl[channel].rs_control) |
					C_RS_DTR);
L
Linus Torvalds 已提交
3636
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3637 3638
				printk(KERN_DEBUG "cyc:set_modem_info raising "
					"Z DTR\n");
L
Linus Torvalds 已提交
3639
#endif
3640
				spin_unlock_irqrestore(&card->card_lock, flags);
3641 3642
			}
			if (clear & TIOCM_DTR) {
3643
				spin_lock_irqsave(&card->card_lock, flags);
3644
				cy_writel(&ch_ctrl[channel].rs_control,
3645 3646
					readl(&ch_ctrl[channel].rs_control) &
					~C_RS_DTR);
L
Linus Torvalds 已提交
3647
#ifdef CY_DEBUG_DTR
J
Jiri Slaby 已提交
3648 3649
				printk(KERN_DEBUG "cyc:set_modem_info clearing "
					"Z DTR\n");
L
Linus Torvalds 已提交
3650
#endif
3651
				spin_unlock_irqrestore(&card->card_lock, flags);
3652 3653 3654 3655
			}
		} else {
			return -ENODEV;
		}
3656 3657
		spin_lock_irqsave(&card->card_lock, flags);
		retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3658
		if (retval != 0) {
J
Jiri Slaby 已提交
3659 3660
			printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
				"was %x\n", info->line, retval);
3661
		}
3662
		spin_unlock_irqrestore(&card->card_lock, flags);
L
Linus Torvalds 已提交
3663
	}
3664 3665
	return 0;
}				/* cy_tiocmset */
L
Linus Torvalds 已提交
3666 3667 3668 3669

/*
 * cy_break() --- routine which turns the break handling on or off
 */
3670
static void cy_break(struct tty_struct *tty, int break_state)
L
Linus Torvalds 已提交
3671
{
3672
	struct cyclades_port *info = tty->driver_data;
3673
	struct cyclades_card *card;
3674
	unsigned long flags;
L
Linus Torvalds 已提交
3675

3676 3677
	if (serial_paranoia_check(info, tty->name, "cy_break"))
		return;
L
Linus Torvalds 已提交
3678

3679 3680 3681 3682
	card = info->card;

	spin_lock_irqsave(&card->card_lock, flags);
	if (!IS_CYC_Z(*card)) {
3683 3684 3685 3686 3687 3688 3689
		/* 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) {
3690
					spin_unlock_irqrestore(&card->card_lock, flags);
3691
					start_xmit(info);
3692
					spin_lock_irqsave(&card->card_lock, flags);
3693 3694 3695 3696 3697 3698
				}
			}
		} else {
			if (!info->breakoff) {
				info->breakoff = 1;
				if (!info->xmit_cnt) {
3699
					spin_unlock_irqrestore(&card->card_lock, flags);
3700
					start_xmit(info);
3701
					spin_lock_irqsave(&card->card_lock, flags);
3702 3703
				}
			}
L
Linus Torvalds 已提交
3704 3705
		}
	} else {
3706 3707 3708
		int retval;

		if (break_state == -1) {
3709 3710
			retval = cyz_issue_cmd(card,
				info->line - card->first_line,
3711 3712
				C_CM_SET_BREAK, 0L);
			if (retval != 0) {
J
Jiri Slaby 已提交
3713 3714
				printk(KERN_ERR "cyc:cy_break (set) retval on "
					"ttyC%d was %x\n", info->line, retval);
3715 3716
			}
		} else {
3717 3718
			retval = cyz_issue_cmd(card,
				info->line - card->first_line,
3719 3720
				C_CM_CLR_BREAK, 0L);
			if (retval != 0) {
J
Jiri Slaby 已提交
3721 3722 3723
				printk(KERN_DEBUG "cyc:cy_break (clr) retval "
					"on ttyC%d was %x\n", info->line,
					retval);
3724
			}
L
Linus Torvalds 已提交
3725 3726
		}
	}
3727
	spin_unlock_irqrestore(&card->card_lock, flags);
3728
}				/* cy_break */
L
Linus Torvalds 已提交
3729 3730

static int
3731
get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
L
Linus Torvalds 已提交
3732 3733
{

3734 3735 3736 3737 3738 3739 3740 3741
	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
3742

3743
static int set_threshold(struct cyclades_port *info, unsigned long value)
L
Linus Torvalds 已提交
3744
{
3745
	struct cyclades_card *card;
3746
	void __iomem *base_addr;
3747
	int channel, chip, index;
3748
	unsigned long flags;
L
Linus Torvalds 已提交
3749

3750
	card = info->card;
3751 3752
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
3753 3754
		chip = channel >> 2;
		channel &= 0x03;
3755
		index = card->bus_index;
3756
		base_addr =
3757
		    card->base_addr + (cy_chip_offset[chip] << index);
3758 3759 3760

		info->cor3 &= ~CyREC_FIFO;
		info->cor3 |= value & CyREC_FIFO;
L
Linus Torvalds 已提交
3761

3762
		spin_lock_irqsave(&card->card_lock, flags);
3763 3764
		cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
		cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3765
		spin_unlock_irqrestore(&card->card_lock, flags);
3766 3767 3768
	}
	return 0;
}				/* set_threshold */
L
Linus Torvalds 已提交
3769 3770

static int
3771
get_threshold(struct cyclades_port *info, unsigned long __user * value)
L
Linus Torvalds 已提交
3772
{
3773
	struct cyclades_card *card;
3774
	void __iomem *base_addr;
3775
	int channel, chip, index;
3776
	unsigned long tmp;
L
Linus Torvalds 已提交
3777

3778
	card = info->card;
3779 3780
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
3781 3782
		chip = channel >> 2;
		channel &= 0x03;
3783 3784
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3785

3786
		tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3787 3788
		return put_user(tmp, value);
	}
J
Jiri Slaby 已提交
3789
	return 0;
3790
}				/* get_threshold */
L
Linus Torvalds 已提交
3791 3792

static int
3793
set_default_threshold(struct cyclades_port *info, unsigned long value)
L
Linus Torvalds 已提交
3794
{
3795 3796 3797
	info->default_threshold = value & 0x0f;
	return 0;
}				/* set_default_threshold */
L
Linus Torvalds 已提交
3798 3799

static int
3800
get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
L
Linus Torvalds 已提交
3801
{
3802 3803
	return put_user(info->default_threshold, value);
}				/* get_default_threshold */
L
Linus Torvalds 已提交
3804

3805
static int set_timeout(struct cyclades_port *info, unsigned long value)
L
Linus Torvalds 已提交
3806
{
3807
	struct cyclades_card *card;
3808
	void __iomem *base_addr;
3809
	int channel, chip, index;
3810
	unsigned long flags;
L
Linus Torvalds 已提交
3811

3812
	card = info->card;
3813 3814
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
3815 3816
		chip = channel >> 2;
		channel &= 0x03;
3817 3818
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
3819

3820
		spin_lock_irqsave(&card->card_lock, flags);
3821
		cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3822
		spin_unlock_irqrestore(&card->card_lock, flags);
3823 3824 3825
	}
	return 0;
}				/* set_timeout */
L
Linus Torvalds 已提交
3826

3827
static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
L
Linus Torvalds 已提交
3828
{
3829
	struct cyclades_card *card;
3830
	void __iomem *base_addr;
3831
	int channel, chip, index;
3832
	unsigned long tmp;
L
Linus Torvalds 已提交
3833

3834
	card = info->card;
3835 3836
	channel = info->line - card->first_line;
	if (!IS_CYC_Z(*card)) {
3837 3838
		chip = channel >> 2;
		channel &= 0x03;
3839 3840
		index = card->bus_index;
		base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3841

3842
		tmp = readb(base_addr + (CyRTPR << index));
3843 3844
		return put_user(tmp, value);
	}
J
Jiri Slaby 已提交
3845
	return 0;
3846
}				/* get_timeout */
L
Linus Torvalds 已提交
3847

3848
static int set_default_timeout(struct cyclades_port *info, unsigned long value)
L
Linus Torvalds 已提交
3849
{
3850 3851 3852
	info->default_timeout = value & 0xff;
	return 0;
}				/* set_default_timeout */
L
Linus Torvalds 已提交
3853 3854

static int
3855
get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
L
Linus Torvalds 已提交
3856
{
3857 3858
	return put_user(info->default_timeout, value);
}				/* get_default_timeout */
L
Linus Torvalds 已提交
3859 3860 3861 3862 3863 3864 3865

/*
 * 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
3866 3867
cy_ioctl(struct tty_struct *tty, struct file *file,
	 unsigned int cmd, unsigned long arg)
L
Linus Torvalds 已提交
3868
{
3869
	struct cyclades_port *info = tty->driver_data;
3870 3871 3872 3873 3874 3875 3876 3877
	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
3878 3879

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
3880 3881
	printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
		info->line, cmd, arg);
L
Linus Torvalds 已提交
3882 3883
#endif

3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911
	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
3912
	case CYSETRFLOW:
3913 3914 3915
		info->rflow = (int)arg;
		ret_val = 0;
		break;
L
Linus Torvalds 已提交
3916
	case CYGETRFLOW:
3917 3918
		ret_val = info->rflow;
		break;
L
Linus Torvalds 已提交
3919
	case CYSETRTSDTR_INV:
3920 3921 3922
		info->rtsdtr_inv = (int)arg;
		ret_val = 0;
		break;
L
Linus Torvalds 已提交
3923
	case CYGETRTSDTR_INV:
3924 3925
		ret_val = info->rtsdtr_inv;
		break;
L
Linus Torvalds 已提交
3926
	case CYGETCD1400VER:
3927 3928
		ret_val = info->chip_rev;
		break;
L
Linus Torvalds 已提交
3929 3930
#ifndef CONFIG_CYZ_INTR
	case CYZSETPOLLCYCLE:
3931 3932 3933
		cyz_polling_cycle = (arg * HZ) / 1000;
		ret_val = 0;
		break;
L
Linus Torvalds 已提交
3934
	case CYZGETPOLLCYCLE:
3935 3936 3937
		ret_val = (cyz_polling_cycle * 1000) / HZ;
		break;
#endif				/* CONFIG_CYZ_INTR */
L
Linus Torvalds 已提交
3938
	case CYSETWAIT:
3939 3940 3941
		info->closing_wait = (unsigned short)arg *HZ / 100;
		ret_val = 0;
		break;
L
Linus Torvalds 已提交
3942
	case CYGETWAIT:
3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959
		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
3960
	case TIOCMIWAIT:
3961
		spin_lock_irqsave(&info->card->card_lock, flags);
3962
		/* note the counters on entry */
J
Jiri Slaby 已提交
3963
		cnow = info->icount;
3964
		spin_unlock_irqrestore(&info->card->card_lock, flags);
J
Jiri Slaby 已提交
3965 3966
		ret_val = wait_event_interruptible(info->delta_msr_wait, ({
			cprev = cnow;
3967
			spin_lock_irqsave(&info->card->card_lock, flags);
3968
			cnow = info->icount;	/* atomic copy */
3969
			spin_unlock_irqrestore(&info->card->card_lock, flags);
3970

J
Jiri Slaby 已提交
3971 3972 3973 3974 3975 3976
			((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
3977

3978 3979 3980 3981 3982 3983
		/*
		 * 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
3984
	case TIOCGICOUNT:
3985
		spin_lock_irqsave(&info->card->card_lock, flags);
3986
		cnow = info->icount;
3987
		spin_unlock_irqrestore(&info->card->card_lock, flags);
3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026
		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
4027 4028

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4029
	printk(KERN_DEBUG "cyc:cy_ioctl done\n");
L
Linus Torvalds 已提交
4030 4031
#endif

4032 4033
	return ret_val;
}				/* cy_ioctl */
L
Linus Torvalds 已提交
4034 4035 4036 4037 4038 4039 4040

/*
 * 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.
 */
4041
static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
L
Linus Torvalds 已提交
4042
{
4043
	struct cyclades_port *info = tty->driver_data;
L
Linus Torvalds 已提交
4044 4045

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4046
	printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4047 4048
#endif

4049 4050 4051 4052 4053 4054 4055
	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
4056
#if 0
4057 4058 4059 4060 4061 4062 4063 4064 4065
	/*
	 * 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
4066
#endif
4067
}				/* cy_set_termios */
L
Linus Torvalds 已提交
4068 4069 4070 4071

/* This function is used to send a high-priority XON/XOFF character to
   the device.
*/
4072
static void cy_send_xchar(struct tty_struct *tty, char ch)
L
Linus Torvalds 已提交
4073
{
4074
	struct cyclades_port *info = tty->driver_data;
4075 4076
	struct cyclades_card *card;
	int channel;
L
Linus Torvalds 已提交
4077

4078
	if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
L
Linus Torvalds 已提交
4079 4080
		return;

4081
	info->x_char = ch;
L
Linus Torvalds 已提交
4082 4083

	if (ch)
4084
		cy_start(tty);
L
Linus Torvalds 已提交
4085 4086

	card = info->card;
4087
	channel = info->line - card->first_line;
L
Linus Torvalds 已提交
4088

4089
	if (IS_CYC_Z(*card)) {
4090
		if (ch == STOP_CHAR(tty))
4091
			cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4092
		else if (ch == START_CHAR(tty))
4093
			cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
L
Linus Torvalds 已提交
4094 4095 4096 4097 4098 4099 4100
	}
}

/* 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.
 */
4101
static void cy_throttle(struct tty_struct *tty)
L
Linus Torvalds 已提交
4102
{
4103
	struct cyclades_port *info = tty->driver_data;
4104
	struct cyclades_card *card;
4105 4106
	unsigned long flags;
	void __iomem *base_addr;
4107
	int chip, channel, index;
L
Linus Torvalds 已提交
4108 4109

#ifdef CY_DEBUG_THROTTLE
4110
	char buf[64];
L
Linus Torvalds 已提交
4111

J
Jiri Slaby 已提交
4112
	printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4113
			tty->ldisc.chars_in_buffer(tty), info->line);
L
Linus Torvalds 已提交
4114 4115
#endif

4116 4117 4118 4119 4120 4121 4122
	if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
		return;
	}

	card = info->card;

	if (I_IXOFF(tty)) {
4123
		if (!IS_CYC_Z(*card))
4124 4125 4126 4127
			cy_send_xchar(tty, STOP_CHAR(tty));
		else
			info->throttle = 1;
	}
L
Linus Torvalds 已提交
4128

4129
	if (tty->termios->c_cflag & CRTSCTS) {
4130 4131
		channel = info->line - card->first_line;
		if (!IS_CYC_Z(*card)) {
4132 4133
			chip = channel >> 2;
			channel &= 0x03;
4134 4135
			index = card->bus_index;
			base_addr = card->base_addr +
4136 4137
				(cy_chip_offset[chip] << index);

4138
			spin_lock_irqsave(&card->card_lock, flags);
4139 4140 4141 4142 4143 4144 4145 4146 4147
			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);
			}
4148
			spin_unlock_irqrestore(&card->card_lock, flags);
4149 4150 4151 4152 4153
		} else {
			info->throttle = 1;
		}
	}
}				/* cy_throttle */
L
Linus Torvalds 已提交
4154 4155 4156 4157 4158 4159

/*
 * 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.
 */
4160
static void cy_unthrottle(struct tty_struct *tty)
L
Linus Torvalds 已提交
4161
{
4162
	struct cyclades_port *info = tty->driver_data;
4163
	struct cyclades_card *card;
4164 4165
	unsigned long flags;
	void __iomem *base_addr;
4166
	int chip, channel, index;
L
Linus Torvalds 已提交
4167 4168

#ifdef CY_DEBUG_THROTTLE
4169 4170
	char buf[64];

J
Jiri Slaby 已提交
4171 4172
	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
4173 4174
#endif

4175 4176 4177
	if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
		return;
	}
L
Linus Torvalds 已提交
4178

4179 4180 4181 4182 4183
	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
4184 4185
	}

4186 4187
	if (tty->termios->c_cflag & CRTSCTS) {
		card = info->card;
4188 4189
		channel = info->line - card->first_line;
		if (!IS_CYC_Z(*card)) {
4190 4191
			chip = channel >> 2;
			channel &= 0x03;
4192 4193
			index = card->bus_index;
			base_addr = card->base_addr +
4194 4195
				(cy_chip_offset[chip] << index);

4196
			spin_lock_irqsave(&card->card_lock, flags);
4197 4198 4199 4200 4201 4202 4203 4204 4205
			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);
			}
4206
			spin_unlock_irqrestore(&card->card_lock, flags);
4207 4208 4209 4210 4211
		} else {
			info->throttle = 0;
		}
	}
}				/* cy_unthrottle */
L
Linus Torvalds 已提交
4212 4213 4214 4215

/* cy_start and cy_stop provide software output flow control as a
   function of XON/XOFF, software CTS, and other such stuff.
*/
4216
static void cy_stop(struct tty_struct *tty)
L
Linus Torvalds 已提交
4217
{
4218
	struct cyclades_card *cinfo;
4219
	struct cyclades_port *info = tty->driver_data;
4220 4221 4222
	void __iomem *base_addr;
	int chip, channel, index;
	unsigned long flags;
L
Linus Torvalds 已提交
4223 4224

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4225
	printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4226 4227
#endif

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

4231
	cinfo = info->card;
4232 4233 4234 4235 4236
	channel = info->line - cinfo->first_line;
	if (!IS_CYC_Z(*cinfo)) {
		index = cinfo->bus_index;
		chip = channel >> 2;
		channel &= 0x03;
4237
		base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
4238

4239
		spin_lock_irqsave(&cinfo->card_lock, flags);
4240 4241 4242
		cy_writeb(base_addr + (CyCAR << index),
			(u_char)(channel & 0x0003)); /* index channel */
		cy_writeb(base_addr + (CySRER << index),
4243
			  readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4244
		spin_unlock_irqrestore(&cinfo->card_lock, flags);
4245 4246
	}
}				/* cy_stop */
L
Linus Torvalds 已提交
4247

4248
static void cy_start(struct tty_struct *tty)
L
Linus Torvalds 已提交
4249
{
4250
	struct cyclades_card *cinfo;
4251
	struct cyclades_port *info = tty->driver_data;
4252 4253 4254
	void __iomem *base_addr;
	int chip, channel, index;
	unsigned long flags;
L
Linus Torvalds 已提交
4255 4256

#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4257
	printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4258 4259
#endif

4260 4261
	if (serial_paranoia_check(info, tty->name, "cy_start"))
		return;
L
Linus Torvalds 已提交
4262

4263
	cinfo = info->card;
4264 4265 4266 4267 4268
	channel = info->line - cinfo->first_line;
	index = cinfo->bus_index;
	if (!IS_CYC_Z(*cinfo)) {
		chip = channel >> 2;
		channel &= 0x03;
4269
		base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
L
Linus Torvalds 已提交
4270

4271
		spin_lock_irqsave(&cinfo->card_lock, flags);
4272 4273
		cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003));	/* index channel */
		cy_writeb(base_addr + (CySRER << index),
4274
			  readb(base_addr + (CySRER << index)) | CyTxRdy);
4275
		spin_unlock_irqrestore(&cinfo->card_lock, flags);
4276 4277
	}
}				/* cy_start */
L
Linus Torvalds 已提交
4278

4279
static void cy_flush_buffer(struct tty_struct *tty)
L
Linus Torvalds 已提交
4280
{
4281
	struct cyclades_port *info = tty->driver_data;
4282 4283
	struct cyclades_card *card;
	int channel, retval;
4284 4285
	unsigned long flags;

L
Linus Torvalds 已提交
4286
#ifdef CY_DEBUG_IO
J
Jiri Slaby 已提交
4287
	printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4288 4289
#endif

4290 4291
	if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
		return;
L
Linus Torvalds 已提交
4292

4293
	card = info->card;
4294
	channel = info->line - card->first_line;
L
Linus Torvalds 已提交
4295

4296
	spin_lock_irqsave(&card->card_lock, flags);
4297
	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4298
	spin_unlock_irqrestore(&card->card_lock, flags);
L
Linus Torvalds 已提交
4299

4300
	if (IS_CYC_Z(*card)) {	/* If it is a Z card, flush the on-board
4301
					   buffers as well */
4302
		spin_lock_irqsave(&card->card_lock, flags);
4303
		retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4304
		if (retval != 0) {
J
Jiri Slaby 已提交
4305 4306
			printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
				"was %x\n", info->line, retval);
4307
		}
4308
		spin_unlock_irqrestore(&card->card_lock, flags);
4309 4310 4311
	}
	tty_wakeup(tty);
}				/* cy_flush_buffer */
L
Linus Torvalds 已提交
4312 4313 4314 4315

/*
 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
 */
4316
static void cy_hangup(struct tty_struct *tty)
L
Linus Torvalds 已提交
4317
{
4318
	struct cyclades_port *info = tty->driver_data;
4319

L
Linus Torvalds 已提交
4320
#ifdef CY_DEBUG_OTHER
J
Jiri Slaby 已提交
4321
	printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
L
Linus Torvalds 已提交
4322 4323
#endif

4324 4325
	if (serial_paranoia_check(info, tty->name, "cy_hangup"))
		return;
L
Linus Torvalds 已提交
4326

4327 4328 4329
	cy_flush_buffer(tty);
	shutdown(info);
	info->count = 0;
L
Linus Torvalds 已提交
4330
#ifdef CY_DEBUG_COUNT
J
Jiri Slaby 已提交
4331 4332
	printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
		current->pid);
L
Linus Torvalds 已提交
4333
#endif
4334 4335 4336 4337
	info->tty = NULL;
	info->flags &= ~ASYNC_NORMAL_ACTIVE;
	wake_up_interruptible(&info->open_wait);
}				/* cy_hangup */
L
Linus Torvalds 已提交
4338 4339 4340 4341 4342 4343 4344 4345 4346

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

J
Jiri Slaby 已提交
4347
static int __devinit cy_init_card(struct cyclades_card *cinfo)
4348 4349
{
	struct cyclades_port *info;
4350
	u32 uninitialized_var(mailbox);
J
Jiri Slaby 已提交
4351
	unsigned int nports, port;
4352
	unsigned short chip_number;
J
Jiri Slaby 已提交
4353
	int uninitialized_var(index);
4354

4355 4356
	spin_lock_init(&cinfo->card_lock);

J
Jiri Slaby 已提交
4357
	if (IS_CYC_Z(*cinfo)) {	/* Cyclades-Z */
4358 4359 4360 4361 4362 4363
		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 */
4364 4365 4366 4367 4368
	} else {
		index = cinfo->bus_index;
		nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
	}

J
Jiri Slaby 已提交
4369 4370 4371
	cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
	if (cinfo->ports == NULL) {
		printk(KERN_ERR "Cyclades: cannot allocate ports\n");
J
Jiri Slaby 已提交
4372
		cinfo->nports = 0;
J
Jiri Slaby 已提交
4373 4374 4375
		return -ENOMEM;
	}

4376 4377
	for (port = cinfo->first_line; port < cinfo->first_line + nports;
			port++) {
J
Jiri Slaby 已提交
4378
		info = &cinfo->ports[port - cinfo->first_line];
4379
		info->magic = CYCLADES_MAGIC;
4380
		info->card = cinfo;
4381 4382 4383 4384 4385 4386 4387
		info->line = port;
		info->flags = STD_COM_FLAGS;
		info->closing_wait = CLOSING_WAIT_DELAY;
		info->close_delay = 5 * HZ / 10;

		init_waitqueue_head(&info->open_wait);
		init_waitqueue_head(&info->close_wait);
J
Jiri Slaby 已提交
4388
		init_completion(&info->shutdown_wait);
4389 4390 4391
		init_waitqueue_head(&info->delta_msr_wait);

		if (IS_CYC_Z(*cinfo)) {
4392 4393 4394 4395
			info->type = PORT_STARTECH;
			if (mailbox == ZO_V1)
				info->xmit_fifo_size = CYZ_FIFO_SIZE;
			else
4396
				info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4397
#ifdef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
4398 4399
			setup_timer(&cyz_rx_full_timer[port],
				cyz_rx_restart, (unsigned long)info);
4400
#endif
4401
		} else {
4402 4403
			info->type = PORT_CIRRUS;
			info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4404
			info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4405 4406
			info->cor2 = CyETC;
			info->cor3 = 0x08;	/* _very_ small rcv threshold */
4407

4408
			chip_number = (port - cinfo->first_line) / 4;
4409
			if ((info->chip_rev = readb(cinfo->base_addr +
4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425
				      (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;
			}
4426 4427
			info->read_status_mask = CyTIMEOUT | CySPECHAR |
				CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4428
		}
4429

4430
	}
4431 4432 4433 4434 4435 4436 4437 4438 4439

#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
J
Jiri Slaby 已提交
4440
	return 0;
4441 4442
}

L
Linus Torvalds 已提交
4443 4444
/* initialize chips on Cyclom-Y card -- return number of valid
   chips (which is number of ports/4) */
4445 4446
static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
		int index)
L
Linus Torvalds 已提交
4447
{
4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460
	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);
4461
		if (readb(base_addr + (CyCCR << index)) != 0x00) {
4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477
			/*************
			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.
		 */
4478
		if (chip_number == 4 && readb(true_base_addr +
4479 4480 4481 4482 4483 4484 4485 4486
				(cy_chip_offset[0] << index) +
				(CyGFRCR << index)) == 0) {
			return chip_number;
		}

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

4487
		if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4488 4489 4490 4491 4492 4493 4494
			/*
			   printk(" chip #%d at %#6lx is not responding ",
			   chip_number, (unsigned long)base_addr);
			   printk("(GFRCR stayed 0)\n",
			 */
			return chip_number;
		}
4495
		if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4496 4497 4498 4499 4500 4501 4502 4503 4504 4505
				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);
4506
		if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4507 4508 4509 4510 4511 4512 4513 4514
			/* 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
4515

4516 4517 4518
		/*
		   printk(" chip #%d at %#6lx is rev 0x%2x\n",
		   chip_number, (unsigned long)base_addr,
4519
		   readb(base_addr+(CyGFRCR<<index)));
4520 4521 4522 4523
		 */
	}
	return chip_number;
}				/* cyy_init_card */
L
Linus Torvalds 已提交
4524 4525 4526 4527 4528 4529 4530

/*
 * ---------------------------------------------------------------------
 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
 * sets global variables and return the number of ISA boards found.
 * ---------------------------------------------------------------------
 */
4531
static int __init cy_detect_isa(void)
L
Linus Torvalds 已提交
4532 4533
{
#ifdef CONFIG_ISA
4534 4535 4536
	unsigned short cy_isa_irq, nboard;
	void __iomem *cy_isa_address;
	unsigned short i, j, cy_isa_nchan;
L
Linus Torvalds 已提交
4537
#ifdef MODULE
4538
	int isparam = 0;
L
Linus Torvalds 已提交
4539 4540
#endif

4541
	nboard = 0;
L
Linus Torvalds 已提交
4542 4543 4544

#ifdef MODULE
	/* Check for module parameters */
4545 4546 4547 4548 4549 4550 4551
	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
4552 4553 4554
	}
#endif

4555 4556 4557 4558
	/* 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
4559
			return nboard;
4560
		}
L
Linus Torvalds 已提交
4561

4562
		/* probe for CD1400... */
L
Linus Torvalds 已提交
4563
		cy_isa_address = ioremap(isa_address, CyISA_Ywin);
J
Jiri Slaby 已提交
4564 4565 4566 4567 4568
		if (cy_isa_address == NULL) {
			printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
					"address\n");
			continue;
		}
4569 4570 4571
		cy_isa_nchan = CyPORTS_PER_CHIP *
			cyy_init_card(cy_isa_address, 0);
		if (cy_isa_nchan == 0) {
J
Jiri Slaby 已提交
4572
			iounmap(cy_isa_address);
4573 4574
			continue;
		}
L
Linus Torvalds 已提交
4575 4576
#ifdef MODULE
		if (isparam && irq[i])
4577
			cy_isa_irq = irq[i];
L
Linus Torvalds 已提交
4578 4579
		else
#endif
4580 4581 4582
			/* 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
4583 4584
			printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
				"IRQ could not be detected.\n",
4585
				(unsigned long)cy_isa_address);
J
Jiri Slaby 已提交
4586
			iounmap(cy_isa_address);
4587 4588 4589 4590
			continue;
		}

		if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
J
Jiri Slaby 已提交
4591 4592 4593
			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",
4594
				(unsigned long)cy_isa_address);
J
Jiri Slaby 已提交
4595
			iounmap(cy_isa_address);
J
Jiri Slaby 已提交
4596
			return nboard;
4597 4598 4599
		}
		/* fill the next cy_card structure available */
		for (j = 0; j < NR_CARDS; j++) {
J
Jiri Slaby 已提交
4600
			if (cy_card[j].base_addr == NULL)
4601 4602 4603
				break;
		}
		if (j == NR_CARDS) {	/* no more cy_cards available */
J
Jiri Slaby 已提交
4604 4605 4606
			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",
4607
				(unsigned long)cy_isa_address);
J
Jiri Slaby 已提交
4608
			iounmap(cy_isa_address);
J
Jiri Slaby 已提交
4609
			return nboard;
4610 4611 4612 4613 4614
		}

		/* allocate IRQ */
		if (request_irq(cy_isa_irq, cyy_interrupt,
				IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
J
Jiri Slaby 已提交
4615 4616 4617
			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
4618
			iounmap(cy_isa_address);
J
Jiri Slaby 已提交
4619
			return nboard;
4620 4621 4622 4623 4624 4625 4626 4627 4628
		}

		/* 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;
J
Jiri Slaby 已提交
4629 4630 4631 4632 4633 4634
		if (cy_init_card(&cy_card[j])) {
			cy_card[j].base_addr = NULL;
			free_irq(cy_isa_irq, &cy_card[j]);
			iounmap(cy_isa_address);
			continue;
		}
4635 4636
		nboard++;

J
Jiri Slaby 已提交
4637 4638
		printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
			"%d channels starting from port %d\n",
4639 4640
			j + 1, (unsigned long)cy_isa_address,
			(unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
J
Jiri Slaby 已提交
4641 4642
			cy_isa_irq, cy_isa_nchan, cy_next_channel);

4643 4644 4645
		for (j = cy_next_channel;
				j < cy_next_channel + cy_isa_nchan; j++)
			tty_register_device(cy_serial_driver, j, NULL);
4646 4647
		cy_next_channel += cy_isa_nchan;
	}
J
Jiri Slaby 已提交
4648
	return nboard;
L
Linus Torvalds 已提交
4649
#else
J
Jiri Slaby 已提交
4650
	return 0;
4651 4652
#endif				/* CONFIG_ISA */
}				/* cy_detect_isa */
L
Linus Torvalds 已提交
4653

J
Jiri Slaby 已提交
4654
#ifdef CONFIG_PCI
4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680
static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
{
	unsigned int a;

	for (a = 0; a < size && *str; a++, str++)
		if (*str & 0x80)
			return -EINVAL;

	for (; a < size; a++, str++)
		if (*str)
			return -EINVAL;

	return 0;
}

static inline void __devinit cyz_fpga_copy(void __iomem *fpga, u8 *data,
		unsigned int size)
{
	for (; size > 0; size--) {
		cy_writel(fpga, *data++);
		udelay(10);
	}
}

static void __devinit plx_init(struct pci_dev *pdev, int irq,
		struct RUNTIME_9060 __iomem *addr)
L
Linus Torvalds 已提交
4681
{
4682
	/* Reset PLX */
4683
	cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4684
	udelay(100L);
4685
	cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4686 4687

	/* Reload Config. Registers from EEPROM */
4688
	cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4689
	udelay(100L);
4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782
	cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);

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

static int __devinit __cyz_load_fw(const struct firmware *fw,
		const char *name, const u32 mailbox, void __iomem *base,
		void __iomem *fpga)
{
	void *ptr = fw->data;
	struct zfile_header *h = ptr;
	struct zfile_config *c, *cs;
	struct zfile_block *b, *bs;
	unsigned int a, tmp, len = fw->size;
#define BAD_FW KERN_ERR "Bad firmware: "
	if (len < sizeof(*h)) {
		printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
		return -EINVAL;
	}

	cs = ptr + h->config_offset;
	bs = ptr + h->block_offset;

	if ((void *)(cs + h->n_config) > ptr + len ||
			(void *)(bs + h->n_blocks) > ptr + len) {
		printk(BAD_FW "too short");
		return  -EINVAL;
	}

	if (cyc_isfwstr(h->name, sizeof(h->name)) ||
			cyc_isfwstr(h->date, sizeof(h->date))) {
		printk(BAD_FW "bad formatted header string\n");
		return -EINVAL;
	}

	if (strncmp(name, h->name, sizeof(h->name))) {
		printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
		return -EINVAL;
	}

	tmp = 0;
	for (c = cs; c < cs + h->n_config; c++) {
		for (a = 0; a < c->n_blocks; a++)
			if (c->block_list[a] > h->n_blocks) {
				printk(BAD_FW "bad block ref number in cfgs\n");
				return -EINVAL;
			}
		if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
			tmp++;
	}
	if (!tmp) {
		printk(BAD_FW "nothing appropriate\n");
		return -EINVAL;
	}

	for (b = bs; b < bs + h->n_blocks; b++)
		if (b->file_offset + b->size > len) {
			printk(BAD_FW "bad block data offset\n");
			return -EINVAL;
		}

	/* everything is OK, let's seek'n'load it */
	for (c = cs; c < cs + h->n_config; c++)
		if (c->mailbox == mailbox && c->function == 0)
			break;

	for (a = 0; a < c->n_blocks; a++) {
		b = &bs[c->block_list[a]];
		if (b->type == ZBLOCK_FPGA) {
			if (fpga != NULL)
				cyz_fpga_copy(fpga, ptr + b->file_offset,
						b->size);
		} else {
			if (base != NULL)
				memcpy_toio(base + b->ram_offset,
					       ptr + b->file_offset, b->size);
		}
	}
#undef BAD_FW
	return 0;
}

static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
		struct RUNTIME_9060 __iomem *ctl_addr, int irq)
{
	const struct firmware *fw;
	struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
	struct CUSTOM_REG __iomem *cust = base_addr;
	struct ZFW_CTRL __iomem *pt_zfwctrl;
J
Jiri Slaby 已提交
4783
	void __iomem *tmp;
4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842 4843 4844
	u32 mailbox, status;
	unsigned int i;
	int retval;

	retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
	if (retval) {
		dev_err(&pdev->dev, "can't get firmware\n");
		goto err;
	}

	/* Check whether the firmware is already loaded and running. If
	   positive, skip this board */
	if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
		u32 cntval = readl(base_addr + 0x190);

		udelay(100);
		if (cntval != readl(base_addr + 0x190)) {
			/* FW counter is working, FW is running */
			dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
					"Skipping board.\n");
			retval = 0;
			goto err_rel;
		}
	}

	/* start boot */
	cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
			~0x00030800UL);

	mailbox = readl(&ctl_addr->mail_box_0);

	if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
		/* stops CPU and set window to beginning of RAM */
		cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
		cy_writel(&cust->cpu_stop, 0);
		cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
		udelay(100);
	}

	plx_init(pdev, irq, ctl_addr);

	if (mailbox != 0) {
		/* load FPGA */
		retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
				base_addr);
		if (retval)
			goto err_rel;
		if (!Z_FPGA_LOADED(ctl_addr)) {
			dev_err(&pdev->dev, "fw upload successful, but fw is "
					"not loaded\n");
			goto err_rel;
		}
	}

	/* stops CPU and set window to beginning of RAM */
	cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
	cy_writel(&cust->cpu_stop, 0);
	cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
	udelay(100);

	/* clear memory */
J
Jiri Slaby 已提交
4845
	for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4846 4847 4848 4849 4850
		cy_writeb(tmp, 255);
	if (mailbox != 0) {
		/* set window to last 512K of RAM */
		cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
		//sleep(1);
J
Jiri Slaby 已提交
4851
		for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943
			cy_writeb(tmp, 255);
		/* set window to beginning of RAM */
		cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
		//sleep(1);
	}

	retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
	release_firmware(fw);
	if (retval)
		goto err;

	/* finish boot and start boards */
	cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
	cy_writel(&cust->cpu_start, 0);
	cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
	i = 0;
	while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
		msleep(100);
	if (status != ZFIRM_ID) {
		if (status == ZFIRM_HLT) {
			dev_err(&pdev->dev, "you need an external power supply "
				"for this number of ports. Firmware halted and "
				"board reset.\n");
			retval = -EIO;
			goto err;
		}
		dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
				"some more time\n", status);
		while ((status = readl(&fid->signature)) != ZFIRM_ID &&
				i++ < 200)
			msleep(100);
		if (status != ZFIRM_ID) {
			dev_err(&pdev->dev, "Board not started in 20 seconds! "
					"Giving up. (fid->signature = 0x%x)\n",
					status);
			dev_info(&pdev->dev, "*** Warning ***: if you are "
				"upgrading the FW, please power cycle the "
				"system before loading the new FW to the "
				"Cyclades-Z.\n");

			if (Z_FPGA_LOADED(ctl_addr))
				plx_init(pdev, irq, ctl_addr);

			retval = -EIO;
			goto err;
		}
		dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
				i / 10);
	}
	pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);

	dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
			base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
			base_addr + readl(&fid->zfwctrl_addr));

	dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
		readl(&pt_zfwctrl->board_ctrl.fw_version),
		readl(&pt_zfwctrl->board_ctrl.n_channel));

	if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
		dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
			"check the connection between the Z host card and the "
			"serial expanders.\n");

		if (Z_FPGA_LOADED(ctl_addr))
			plx_init(pdev, irq, ctl_addr);

		dev_info(&pdev->dev, "Null number of ports detected. Board "
				"reset.\n");
		retval = 0;
		goto err;
	}

	cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
	cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);

	/*
	   Early firmware failed to start looking for commands.
	   This enables firmware interrupts for those commands.
	 */
	cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
			(1 << 17));
	cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
			0x00030800UL);

	plx_init(pdev, irq, ctl_addr);

	return 0;
err_rel:
	release_firmware(fw);
err:
	return retval;
L
Linus Torvalds 已提交
4944 4945
}

J
Jiri Slaby 已提交
4946 4947
static int __devinit cy_pci_probe(struct pci_dev *pdev,
		const struct pci_device_id *ent)
L
Linus Torvalds 已提交
4948
{
J
Jiri Slaby 已提交
4949 4950 4951 4952 4953 4954
	void __iomem *addr0 = NULL, *addr2 = NULL;
	char *card_name = NULL;
	u32 mailbox;
	unsigned int device_id, nchan = 0, card_no, i;
	unsigned char plx_ver;
	int retval, irq;
4955

J
Jiri Slaby 已提交
4956 4957 4958
	retval = pci_enable_device(pdev);
	if (retval) {
		dev_err(&pdev->dev, "cannot enable device\n");
J
Jiri Slaby 已提交
4959
		goto err;
J
Jiri Slaby 已提交
4960
	}
L
Linus Torvalds 已提交
4961

J
Jiri Slaby 已提交
4962
	/* read PCI configuration area */
J
Jiri Slaby 已提交
4963
	irq = pdev->irq;
J
Jiri Slaby 已提交
4964
	device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
L
Linus Torvalds 已提交
4965

J
Jiri Slaby 已提交
4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993
#if defined(__alpha__)
	if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {	/* below 1M? */
		dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
			"addresses on Alpha systems.\n");
		retval = -EIO;
		goto err_dis;
	}
#endif
	if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
		dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
			"addresses\n");
		retval = -EIO;
		goto err_dis;
	}

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

	retval = pci_request_regions(pdev, "cyclades");
	if (retval) {
		dev_err(&pdev->dev, "failed to reserve resources\n");
		goto err_dis;
	}

	retval = -EIO;
J
Jiri Slaby 已提交
4994 4995
	if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
			device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
J
Jiri Slaby 已提交
4996
		card_name = "Cyclom-Y";
L
Linus Torvalds 已提交
4997

J
Jiri Slaby 已提交
4998 4999 5000 5001
		addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
		if (addr0 == NULL) {
			dev_err(&pdev->dev, "can't remap ctl region\n");
			goto err_reg;
J
Jiri Slaby 已提交
5002
		}
J
Jiri Slaby 已提交
5003 5004 5005 5006
		addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
		if (addr2 == NULL) {
			dev_err(&pdev->dev, "can't remap base region\n");
			goto err_unmap;
J
Jiri Slaby 已提交
5007
		}
L
Linus Torvalds 已提交
5008

J
Jiri Slaby 已提交
5009 5010
		nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
		if (nchan == 0) {
J
Jiri Slaby 已提交
5011 5012
			dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
					"Serial-Modules\n");
J
Jiri Slaby 已提交
5013 5014 5015
			return -EIO;
		}
	} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
J
Jiri Slaby 已提交
5016
		struct RUNTIME_9060 __iomem *ctl_addr;
J
Jiri Slaby 已提交
5017

J
Jiri Slaby 已提交
5018 5019 5020 5021 5022
		ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
		if (addr0 == NULL) {
			dev_err(&pdev->dev, "can't remap ctl region\n");
			goto err_reg;
		}
J
Jiri Slaby 已提交
5023 5024

		/* Disable interrupts on the PLX before resetting it */
5025
		cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
J
Jiri Slaby 已提交
5026

5027
		plx_init(pdev, irq, addr0);
5028

J
Jiri Slaby 已提交
5029
		mailbox = (u32)readl(&ctl_addr->mail_box_0);
J
Jiri Slaby 已提交
5030

J
Jiri Slaby 已提交
5031 5032 5033 5034 5035
		addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
				CyPCI_Ze_win : CyPCI_Zwin);
		if (addr2 == NULL) {
			dev_err(&pdev->dev, "can't remap base region\n");
			goto err_unmap;
J
Jiri Slaby 已提交
5036 5037 5038
		}

		if (mailbox == ZE_V1) {
J
Jiri Slaby 已提交
5039 5040 5041 5042
			card_name = "Cyclades-Ze";

			readl(&ctl_addr->mail_box_0);
			nchan = ZE_V1_NPORTS;
J
Jiri Slaby 已提交
5043
		} else {
J
Jiri Slaby 已提交
5044
			card_name = "Cyclades-8Zo";
L
Linus Torvalds 已提交
5045 5046

#ifdef CY_PCI_DEBUG
J
Jiri Slaby 已提交
5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059
			if (mailbox == ZO_V1) {
				cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
				dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
					"id %lx, ver %lx\n", (ulong)(0xff &
					readl(&((struct CUSTOM_REG *)addr2)->
						fpga_id)), (ulong)(0xff &
					readl(&((struct CUSTOM_REG *)addr2)->
						fpga_version)));
				cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
			} else {
				dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
					"Cyclades-Z board.  FPGA not loaded\n");
			}
L
Linus Torvalds 已提交
5060
#endif
J
Jiri Slaby 已提交
5061 5062 5063 5064 5065 5066
			/* 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(addr2 + ID_ADDRESS, 0L);
L
Linus Torvalds 已提交
5067

5068 5069 5070
			retval = cyz_load_fw(pdev, addr2, addr0, irq);
			if (retval)
				goto err_unmap;
J
Jiri Slaby 已提交
5071 5072 5073 5074
			/* 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. */
			nchan = 8;
J
Jiri Slaby 已提交
5075
		}
J
Jiri Slaby 已提交
5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093 5094 5095 5096 5097 5098 5099 5100 5101 5102 5103
	}

	if ((cy_next_channel + nchan) > NR_PORTS) {
		dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
			"channels are available. Change NR_PORTS in "
			"cyclades.c and recompile kernel.\n");
		goto err_unmap;
	}
	/* fill the next cy_card structure available */
	for (card_no = 0; card_no < NR_CARDS; card_no++) {
		if (cy_card[card_no].base_addr == NULL)
			break;
	}
	if (card_no == NR_CARDS) {	/* no more cy_cards available */
		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");
		goto err_unmap;
	}

	if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
			device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
		/* allocate IRQ */
		retval = request_irq(irq, cyy_interrupt,
				IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
		if (retval) {
			dev_err(&pdev->dev, "could not allocate IRQ\n");
			goto err_unmap;
J
Jiri Slaby 已提交
5104
		}
J
Jiri Slaby 已提交
5105 5106
		cy_card[card_no].num_chips = nchan / 4;
	} else {
5107
#ifdef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5108
		/* allocate IRQ only if board has an IRQ */
J
Jiri Slaby 已提交
5109 5110
		if (irq != 0 && irq != 255) {
			retval = request_irq(irq, cyz_interrupt,
J
Jiri Slaby 已提交
5111
					IRQF_SHARED, "Cyclades-Z",
J
Jiri Slaby 已提交
5112
					&cy_card[card_no]);
J
Jiri Slaby 已提交
5113
			if (retval) {
J
Jiri Slaby 已提交
5114
				dev_err(&pdev->dev, "could not allocate IRQ\n");
J
Jiri Slaby 已提交
5115
				goto err_unmap;
5116
			}
J
Jiri Slaby 已提交
5117
		}
5118
#endif				/* CONFIG_CYZ_INTR */
J
Jiri Slaby 已提交
5119
		cy_card[card_no].num_chips = (unsigned int)-1;
J
Jiri Slaby 已提交
5120
	}
5121

J
Jiri Slaby 已提交
5122 5123 5124 5125 5126 5127 5128 5129 5130
	/* set cy_card */
	cy_card[card_no].base_addr = addr2;
	cy_card[card_no].ctl_addr = addr0;
	cy_card[card_no].irq = irq;
	cy_card[card_no].bus_index = 1;
	cy_card[card_no].first_line = cy_next_channel;
	retval = cy_init_card(&cy_card[card_no]);
	if (retval)
		goto err_null;
J
Jiri Slaby 已提交
5131

J
Jiri Slaby 已提交
5132
	pci_set_drvdata(pdev, &cy_card[card_no]);
J
Jiri Slaby 已提交
5133

J
Jiri Slaby 已提交
5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146
	if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
			device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
		/* enable interrupts in the PCI interface */
		plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
		switch (plx_ver) {
		case PLX_9050:

			cy_writeb(addr0 + 0x4c, 0x43);
			break;

		case PLX_9060:
		case PLX_9080:
		default:	/* Old boards, use PLX_9060 */
5147
			plx_init(pdev, irq, addr0);
J
Jiri Slaby 已提交
5148 5149 5150
			cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
			break;
		}
J
Jiri Slaby 已提交
5151 5152
	}

J
Jiri Slaby 已提交
5153 5154 5155 5156 5157 5158
	dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
		"port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
	for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
		tty_register_device(cy_serial_driver, i, &pdev->dev);
	cy_next_channel += nchan;

J
Jiri Slaby 已提交
5159
	return 0;
J
Jiri Slaby 已提交
5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172
err_null:
	cy_card[card_no].base_addr = NULL;
	free_irq(irq, &cy_card[card_no]);
err_unmap:
	pci_iounmap(pdev, addr0);
	if (addr2)
		pci_iounmap(pdev, addr2);
err_reg:
	pci_release_regions(pdev);
err_dis:
	pci_disable_device(pdev);
err:
	return retval;
J
Jiri Slaby 已提交
5173 5174
}

5175
static void __devexit cy_pci_remove(struct pci_dev *pdev)
J
Jiri Slaby 已提交
5176
{
J
Jiri Slaby 已提交
5177
	struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5178
	unsigned int i;
J
Jiri Slaby 已提交
5179

5180
	/* non-Z with old PLX */
J
Jiri Slaby 已提交
5181 5182
	if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
			PLX_9050)
5183 5184 5185
		cy_writeb(cinfo->ctl_addr + 0x4c, 0);
	else
#ifndef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5186
		if (!IS_CYC_Z(*cinfo))
5187 5188 5189 5190
#endif
		cy_writew(cinfo->ctl_addr + 0x68,
				readw(cinfo->ctl_addr + 0x68) & ~0x0900);

J
Jiri Slaby 已提交
5191 5192 5193 5194 5195
	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
5196
		&& !IS_CYC_Z(*cinfo)
J
Jiri Slaby 已提交
5197 5198 5199 5200 5201 5202
#endif /* CONFIG_CYZ_INTR */
		)
		free_irq(cinfo->irq, cinfo);
	pci_release_regions(pdev);

	cinfo->base_addr = NULL;
5203 5204 5205
	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
5206 5207
	cinfo->nports = 0;
	kfree(cinfo->ports);
J
Jiri Slaby 已提交
5208 5209
}

5210 5211 5212 5213 5214 5215 5216 5217
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

5218
static int
L
Linus Torvalds 已提交
5219
cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5220
		int *eof, void *data)
L
Linus Torvalds 已提交
5221
{
5222
	struct cyclades_port *info;
J
Jiri Slaby 已提交
5223
	unsigned int i, j;
5224 5225 5226 5227 5228 5229 5230 5231 5232 5233
	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
5234 5235
	len += size;

5236
	/* Output one line for each known port */
J
Jiri Slaby 已提交
5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263
	for (i = 0; i < NR_CARDS; i++)
		for (j = 0; j < cy_card[i].nports; j++) {
			info = &cy_card[i].ports[j];

			if (info->count)
				size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
					"%10lu %8lu %9lu %6ld\n", info->line,
					(cur_jifs - info->idle_stats.in_use) /
					HZ, info->idle_stats.xmit_bytes,
					(cur_jifs - info->idle_stats.xmit_idle)/
					HZ, info->idle_stats.recv_bytes,
					(cur_jifs - info->idle_stats.recv_idle)/
					HZ, 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;
5264 5265
		}
	*eof = 1;
L
Linus Torvalds 已提交
5266
done:
5267 5268 5269 5270 5271 5272 5273
	*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
5274 5275 5276 5277 5278 5279 5280 5281 5282 5283 5284 5285 5286 5287 5288 5289 5290 5291 5292 5293
}

/* 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
5294
static const struct tty_operations cy_ops = {
5295 5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314
	.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,
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Linus Torvalds 已提交
5315 5316
};

5317
static int __init cy_init(void)
L
Linus Torvalds 已提交
5318
{
J
Jiri Slaby 已提交
5319
	unsigned int nboards;
5320
	int retval = -ENOMEM;
5321 5322 5323

	cy_serial_driver = alloc_tty_driver(NR_PORTS);
	if (!cy_serial_driver)
5324
		goto err;
J
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5325 5326 5327

	printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
			__DATE__, __TIME__);
5328 5329 5330 5331 5332 5333 5334 5335 5336 5337 5338 5339 5340

	/* 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;
5341
	cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5342 5343
	tty_set_operations(cy_serial_driver, &cy_ops);

5344 5345 5346 5347 5348
	retval = tty_register_driver(cy_serial_driver);
	if (retval) {
		printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
		goto err_frtty;
	}
5349 5350 5351 5352 5353 5354 5355 5356 5357

	/* 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 */
5358
	nboards = cy_detect_isa();
5359

5360
#ifdef CONFIG_PCI
5361
	/* look for pci boards */
5362
	retval = pci_register_driver(&cy_pci_driver);
5363 5364 5365 5366
	if (retval && !nboards) {
		tty_unregister_driver(cy_serial_driver);
		goto err_frtty;
	}
5367
#endif
5368 5369 5370 5371 5372 5373

	return 0;
err_frtty:
	put_tty_driver(cy_serial_driver);
err:
	return retval;
5374
}				/* cy_init */
L
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5375

5376
static void __exit cy_cleanup_module(void)
L
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5377
{
J
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5378
	struct cyclades_card *card;
J
Jiri Slaby 已提交
5379
	unsigned int i, e1;
L
Linus Torvalds 已提交
5380 5381

#ifndef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5382
	del_timer_sync(&cyz_timerlist);
L
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5383 5384
#endif /* CONFIG_CYZ_INTR */

5385
	if ((e1 = tty_unregister_driver(cy_serial_driver)))
J
Jiri Slaby 已提交
5386 5387
		printk(KERN_ERR "failed to unregister Cyclades serial "
				"driver(%d)\n", e1);
L
Linus Torvalds 已提交
5388

5389 5390 5391 5392
#ifdef CONFIG_PCI
	pci_unregister_driver(&cy_pci_driver);
#endif

5393
	for (i = 0; i < NR_CARDS; i++) {
J
Jiri Slaby 已提交
5394 5395
		card = &cy_card[i];
		if (card->base_addr) {
5396
			/* clear interrupt */
J
Jiri Slaby 已提交
5397 5398 5399 5400 5401
			cy_writeb(card->base_addr + Cy_ClrIntr, 0);
			iounmap(card->base_addr);
			if (card->ctl_addr)
				iounmap(card->ctl_addr);
			if (card->irq
L
Linus Torvalds 已提交
5402
#ifndef CONFIG_CYZ_INTR
J
Jiri Slaby 已提交
5403
				&& !IS_CYC_Z(*card)
L
Linus Torvalds 已提交
5404
#endif /* CONFIG_CYZ_INTR */
5405
				)
J
Jiri Slaby 已提交
5406
				free_irq(card->irq, card);
J
Jiri Slaby 已提交
5407
			for (e1 = card->first_line; e1 < card->first_line +
J
Jiri Slaby 已提交
5408
					card->nports; e1++)
5409
				tty_unregister_device(cy_serial_driver, e1);
J
Jiri Slaby 已提交
5410
			kfree(card->ports);
5411 5412
		}
	}
5413 5414

	put_tty_driver(cy_serial_driver);
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5415 5416 5417 5418 5419 5420
} /* cy_cleanup_module */

module_init(cy_init);
module_exit(cy_cleanup_module);

MODULE_LICENSE("GPL");
5421
MODULE_VERSION(CY_VERSION);