3 #undef Z_EXT_CHARS_IN_BUFFER
6 * linux/drivers/char/cyclades.c
8 * This file contains the driver for the Cyclades async multiport
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
14 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
16 * Much of the design and some of the code came from serial.c
17 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
18 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
19 * and then fixed as suggested by Michael K. Johnson 12/12/92.
20 * Converted to pci probing and cleaned up by Jiri Slaby.
22 * This version supports shared IRQ's (only for PCI boards).
24 * Prevent users from opening non-existing Z ports.
26 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
27 * Fixed the PCI detection function to work properly on Alpha systems.
28 * Implemented support for TIOCSERGETLSR ioctl.
29 * Implemented full support for non-standard baud rates.
31 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
32 * Request PLX I/O region, although driver doesn't use it, to avoid
33 * problems with other drivers accessing it.
34 * Removed count for on-board buffer characters in cy_chars_in_buffer
37 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
38 * Driver now reports physical instead of virtual memory addresses.
39 * Masks were added to some Cyclades-Z read accesses.
40 * Implemented workaround for PLX9050 bug that would cause a system lockup
41 * in certain systems, depending on the MMIO addresses allocated to the
43 * Changed the Tx interrupt programming in the CD1400 chips to boost up
44 * performance (Cyclom-Y only).
45 * Code is now compliant with the new module interface (module_[init|exit]).
46 * Make use of the PCI helper functions to access PCI resources.
47 * Did some code "housekeeping".
49 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
50 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
52 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
53 * Fixed SMP locking in Cyclom-Y interrupt handler.
55 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
56 * Added a new cyclades_card field called nports to allow the driver to
57 * know the exact number of ports found by the Z firmware after its load;
58 * RX buffer contention prevention logic on interrupt op mode revisited
60 * Revisited printk's for Z debug;
61 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
63 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
64 * Fixed bug in cyz_poll that would make all ports but port 0
65 * unable to transmit/receive data (Cyclades-Z only);
66 * Implemented logic to prevent the RX buffer from being stuck with data
67 * due to a driver / firmware race condition in interrupt op mode
69 * Fixed bug in block_til_ready logic that would lead to a system crash;
70 * Revisited cy_close spinlock usage;
72 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
73 * Revisited CONFIG_PCI conditional compilation for PCI board support;
74 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
75 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
76 * Removed CTS handling from the driver -- this is now completely handled
77 * by the firmware (Cyclades-Z only);
78 * Flush RX on-board buffers on a port open (Cyclades-Z only);
79 * Fixed handling of ASYNC_SPD_* TTY flags;
80 * Module unload now unmaps all memory area allocated by ioremap;
82 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
83 * Removed CY_PROC conditional compilation;
84 * Implemented SMP-awareness for the driver;
85 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
87 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
88 * (irq=NN) as parameters (only for ISA boards);
89 * Fixed bug in set_line_char that would prevent the Cyclades-Z
90 * ports from being configured at speeds above 115.2Kbps;
91 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
92 * switching from working properly;
93 * The driver now only prints IRQ info for the Cyclades-Z if it's
94 * configured to work in interrupt mode;
96 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
97 * Added support for interrupt mode operation for the Z cards;
98 * Removed the driver inactivity control for the Z;
99 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
100 * the Z firmware is not loaded yet;
101 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
102 * same functionality;
103 * Implemented workaround for IRQ setting loss on the PCI configuration
104 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
106 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
107 * /proc entry location changed to /proc/tty/driver/cyclades;
108 * Added support to shared IRQ's (only for PCI boards);
109 * Added support for Cobalt Qube2 systems;
110 * IRQ [de]allocation scheme revisited;
111 * BREAK implementation changed in order to make use of the 'break_ctl'
113 * Fixed typo in TTY structure field 'driver_name';
114 * Included a PCI bridge reset and EEPROM reload in the board
115 * initialization code (for both Y and Z series).
117 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
118 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
119 * closed properly after a SIGINT;
120 * Module usage counter scheme revisited;
121 * Added support to the upcoming Y PCI boards (i.e., support to additional
124 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
125 * Removed all unnecessary page-alignement operations in ioremap calls
126 * (ioremap is currently safe for these operations).
128 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
129 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
130 * order to make PLX9050-based boards work with certain motherboards.
132 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
133 * cy_close function now resets (correctly) the tty->closing flag;
134 * JIFFIES_DIFF macro fixed.
136 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
137 * Fixed bug in cy_close function, which was not informing HW of
138 * which port should have the reception disabled before doing so;
139 * fixed Cyclom-8YoP hardware detection bug.
141 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
142 * Fixed bug in cy_close function, which causes malfunction
143 * of one of the first 4 ports when a higher port is closed
146 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
147 * Fixed Cyclom-4Yo hardware detection bug.
149 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
150 * /proc/cyclades implementation with great collaboration of
151 * Marc Lewis <marc@blarg.net>;
152 * cyy_interrupt was changed to avoid occurrence of kernel oopses
153 * during PPP operation.
155 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
156 * General code review in order to comply with 2.1 kernel standards;
157 * data loss prevention for slow devices revisited (cy_wait_until_sent
159 * removed conditional compilation for new/old PCI structure support
160 * (now the driver only supports the new PCI structure).
162 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
163 * added conditional compilation for new/old PCI structure support;
164 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
166 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
167 * cleaned up the data loss fix;
168 * fixed XON/XOFF handling once more (Cyclades-Z);
169 * general review of the driver routines;
170 * introduction of a mechanism to prevent data loss with slow
171 * printers, by forcing a delay before closing the port.
173 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
174 * fixed detection/handling of new CD1400 in Ye boards;
175 * fixed XON/XOFF handling (Cyclades-Z);
176 * fixed data loss caused by a premature port close;
177 * introduction of a flag that holds the CD1400 version ID per port
178 * (used by the CYGETCD1400VER new ioctl).
180 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
181 * Code review for the module cleanup routine;
182 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
183 * includes anonymous changes regarding signal_pending.
185 * Revision 2.1 1997/11/01 17:42:41 ivan
186 * Changes in the driver to support Alpha systems (except 8Zo V_1);
187 * BREAK fix for the Cyclades-Z boards;
188 * driver inactivity control by FW implemented;
189 * introduction of flag that allows driver to take advantage of
190 * a special CD1400 feature related to HW flow control;
191 * added support for the CD1400 rev. J (Cyclom-Y boards);
192 * introduction of ioctls to:
193 * - control the rtsdtr_inv flag (Cyclom-Y);
194 * - control the rflow flag (Cyclom-Y);
195 * - adjust the polling interval (Cyclades-Z);
197 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
198 * Fixes related to kernel version conditional
201 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
202 * Compatibility issues between kernels 2.0.x and
203 * 2.1.x (mainly related to clear_bit function).
205 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
206 * Changes to define the memory window according to the
209 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
210 * Changes to support new cycladesZ boards.
212 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
213 * Merge of Bentson's and Daniel's version 1.36.4.28.
214 * Corrects bug in cy_detect_pci: check if there are more
215 * ports than the number of static structs allocated.
216 * Warning message during initialization if this driver is
217 * used with the new generation of cycladesZ boards. Those
218 * will be supported only in next release of the driver.
219 * Corrects bug in cy_detect_pci and cy_detect_isa that
220 * returned wrong number of VALID boards, when a cyclomY
221 * was found with no serial modules connected.
222 * Changes to use current (2.1.x) kernel subroutine names
223 * and created macros for compilation with 2.0.x kernel,
224 * instead of the other way around.
226 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
227 * Change queue_task_irq_off to queue_task_irq.
228 * The inline function queue_task_irq_off (tqueue.h)
229 * was removed from latest releases of 2.1.x kernel.
230 * Use of macro __init to mark the initialization
231 * routines, so memory can be reused.
232 * Also incorporate implementation of critical region
233 * in function cleanup_module() created by anonymous
236 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
237 * Change to support new firmware that solves DCD problem:
238 * application could fail to receive SIGHUP signal when DCD
241 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
242 * Changed for support linux versions 2.1.X.
243 * Backward compatible with linux versions 2.0.X.
244 * Corrected illegal use of filler field in
246 * Deleted some debug messages.
248 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
249 * Included check for NULL tty pointer in cyz_poll.
251 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
252 * Bill Foster at Blarg! Online services noticed that
253 * some of the switch elements of -Z modem control
254 * lacked a closing "break;"
256 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
257 * Changed low water threshold for buffer xmit_buf
259 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
260 * Marcio provided fix to modem status fetch for -Z
262 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
263 * improve mapping of -Z control page (thanks to Steve
264 * Price <stevep@fa.tdktca.com> for help on this)
266 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
267 * shift from CPU-bound to memcopy in cyz_polling operation
269 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
270 * Added support to set and report higher speeds.
272 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
273 * Some fixes in the HW flow control for the BETA release.
274 * Don't try to register the IRQ.
276 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
277 * make sure "cyc" appears in all kernel messages; all soft interrupts
278 * handled by same routine; recognize out-of-band reception; comment
279 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
280 * fix race condition in -Z buffer management; only -Y needs to explicitly
281 * flush chars; tidy up some startup messages;
283 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
284 * shift MOD_INC_USE_COUNT location to match
285 * serial.c; purge some diagnostic messages;
287 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
288 * enable modem status messages and fetch & process them; note
289 * time of last activity type for each port; set_line_char now
290 * supports more than line 0 and treats 0 baud correctly;
291 * get_modem_info senses rs_status;
293 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
294 * barely works--now's time to turn on
295 * more features 'til it breaks
297 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
298 * check more -Z board status; shorten boot message
300 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
301 * fix reference to ch_ctrl in startup; verify return
302 * values from cyz_issue_cmd and cyz_update_channel;
303 * more stuff to get modem control correct;
305 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
306 * more -Z stuff folded in; re-order changes to put -Z stuff
307 * after -Y stuff (to make changes clearer)
309 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
310 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
311 * Add code to send break. Clear firmware ID word at startup (so
312 * that other code won't talk to inactive board).
314 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
315 * add code for -Z in set_line_char
317 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
318 * fold more -Z stuff (or in some cases, error messages)
319 * into driver; add text to "don't know what to do" messages.
321 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
322 * moved compile-time flags near top of file; cosmetic changes
323 * to narrow text (to allow 2-up printing); changed many declarations
324 * to "static" to limit external symbols; shuffled code order to
325 * coalesce -Y and -Z specific code, also to put internal functions
326 * in order of tty_driver structure; added code to recognize -Z
327 * ports (and for moment, do nothing or report error); add cy_startup
328 * to parse boot command line for extra base addresses for ISA probes;
330 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
331 * reorder some code, fix types of some vars (int vs. long),
332 * add cy_setup to support user declared ISA addresses
334 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
335 * dump ioctl based firmware load (it's now a user level
336 * program); ensure uninitialzed ports cannot be used
338 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
339 * rename vars and restructure some code
341 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
342 * get right status back after boot load
344 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
345 * successfully loads firmware
347 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
348 * add more of the code for the boot/load ioctls
350 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
351 * start to add Z functionality--starting with ioctl
352 * for loading firmware
354 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
355 * added code to recognize Z/PCI card at initialization; report
356 * presence, but card is not initialized (because firmware needs
359 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
360 * starting minor number at zero; added missing verify_area
361 * as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
363 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
364 * remove unneeded boot message & fix CLOCAL hardware flow
365 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
366 * remove unused diagnostic statements; minor 0 is first;
368 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
369 * The kernel function vremap (available only in later 1.3.xx kernels)
370 * allows the access to memory addresses above the RAM. This revision
371 * of the driver supports PCI boards below 1Mb (device id 0x100) and
372 * above 1Mb (device id 0x101).
374 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
375 * Some global changes to interrupt handling spilled into
376 * this driver--mostly unused arguments in system function
377 * calls. Also added change by Marcio Saito which should
378 * reduce lost interrupts at startup by fast processors.
380 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
381 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
382 * in 1.3.41 kernel to remove a possible race condition, extend
383 * some error messages, and let the driver run as a loadable module
384 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
385 * possible race condition.
386 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
388 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
389 * Changes by Linus Torvalds in 1.3.33 kernel distribution
390 * required due to reordering of driver initialization.
391 * Drivers are now initialized *after* memory management.
393 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
394 * remove printk from ISR; fix typo
396 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
397 * Minor fixes in the PCI board support. PCI function calls in
398 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
399 * <duncan@okay.com>. "bad serial count" message removed.
401 * Revision 1.36.3 1995/08/22 09:19:42 marcio
402 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
403 * board initialization. Changes in the boot messages. The driver
404 * supports up to 4 boards and 64 ports by default.
406 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
407 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
409 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
410 * add missing break in modem control block in ioctl switch statement
411 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
413 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
414 * make sure CTS flow control is set as soon as possible (thanks
415 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
417 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
418 * initialize defaults for receive threshold and stale data timeout;
421 * Revision 1.36 1995/03/10 23:33:53 bentson
422 * added support of chips 4-7 in 32 port Cyclom-Ye;
423 * fix cy_interrupt pointer dereference problem
424 * (Joe Portman <baron@aa.net>);
425 * give better error response if open is attempted on non-existent port
426 * (Zachariah Vaum <jchryslr@netcom.com>);
427 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
428 * conditional compilation for -16Y on systems with fast, noisy bus;
429 * comment out diagnostic print function;
430 * cleaned up table of base addresses;
431 * set receiver time-out period register to correct value,
432 * set receive threshold to better default values,
433 * set chip timer to more accurate 200 Hz ticking,
434 * add code to monitor and modify receive parameters
435 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
436 * <njs@scifi.emi.net>);
438 * Revision 1.35 1994/12/16 13:54:18 steffen
439 * additional patch by Marcio Saito for board detection
440 * Accidently left out in 1.34
442 * Revision 1.34 1994/12/10 12:37:12 steffen
443 * This is the corrected version as suggested by Marcio Saito
445 * Revision 1.33 1994/12/01 22:41:18 bentson
446 * add hooks to support more high speeds directly; add tytso
447 * patch regarding CLOCAL wakeups
449 * Revision 1.32 1994/11/23 19:50:04 bentson
450 * allow direct kernel control of higher signalling rates;
451 * look for cards at additional locations
453 * Revision 1.31 1994/11/16 04:33:28 bentson
454 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
455 * a problem in chars_in_buffer has been resolved by some
456 * small changes; this should yield smoother output
458 * Revision 1.30 1994/11/16 04:28:05 bentson
459 * Fix from Corey Minyard, Internet: minyard@metronet.com,
460 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
461 * cy_hangup that appears to clear up much (all?) of the
462 * DTR glitches; also he's added/cleaned-up diagnostic messages
464 * Revision 1.29 1994/11/16 04:16:07 bentson
465 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
466 * operate higher speeds in same way as other serial ports;
467 * add more serial ports (for up to two 16-port muxes).
469 * Revision 1.28 1994/11/04 00:13:16 root
470 * turn off diagnostic messages
472 * Revision 1.27 1994/11/03 23:46:37 root
473 * bunch of changes to bring driver into greater conformance
474 * with the serial.c driver (looking for missed fixes)
476 * Revision 1.26 1994/11/03 22:40:36 root
477 * automatic interrupt probing fixed.
479 * Revision 1.25 1994/11/03 20:17:02 root
480 * start to implement auto-irq
482 * Revision 1.24 1994/11/03 18:01:55 root
483 * still working on modem signals--trying not to drop DTR
484 * during the getty/login processes
486 * Revision 1.23 1994/11/03 17:51:36 root
487 * extend baud rate support; set receive threshold as function
488 * of baud rate; fix some problems with RTS/CTS;
490 * Revision 1.22 1994/11/02 18:05:35 root
491 * changed arguments to udelay to type long to get
492 * delays to be of correct duration
494 * Revision 1.21 1994/11/02 17:37:30 root
495 * employ udelay (after calibrating loops_per_second earlier
496 * in init/main.c) instead of using home-grown delay routines
498 * Revision 1.20 1994/11/02 03:11:38 root
499 * cy_chars_in_buffer forces a return value of 0 to let
500 * login work (don't know why it does); some functions
501 * that were returning EFAULT, now executes the code;
502 * more work on deciding when to disable xmit interrupts;
504 * Revision 1.19 1994/11/01 20:10:14 root
505 * define routine to start transmission interrupts (by enabling
506 * transmit interrupts); directly enable/disable modem interrupts;
508 * Revision 1.18 1994/11/01 18:40:45 bentson
509 * Don't always enable transmit interrupts in startup; interrupt on
510 * TxMpty instead of TxRdy to help characters get out before shutdown;
511 * restructure xmit interrupt to check for chars first and quit if
512 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
515 * Revision 1.17 1994/10/30 04:39:45 bentson
516 * rename serial_driver and callout_driver to cy_serial_driver and
517 * cy_callout_driver to avoid linkage interference; initialize
518 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
519 * from cyclades_port structure; add paranoia check to cy_close;
521 * Revision 1.16 1994/10/30 01:14:33 bentson
522 * change major numbers; add some _early_ return statements;
524 * Revision 1.15 1994/10/29 06:43:15 bentson
525 * final tidying up for clean compile; enable some error reporting
527 * Revision 1.14 1994/10/28 20:30:22 Bentson
528 * lots of changes to drag the driver towards the new tty_io
529 * structures and operation. not expected to work, but may
532 * Revision 1.13 1994/07/21 23:08:57 Bentson
533 * add some diagnostic cruft; support 24 lines (for testing
534 * both -8Y and -16Y cards; be more thorough in servicing all
535 * chips during interrupt; add "volatile" a few places to
536 * circumvent compiler optimizations; fix base & offset
537 * computations in block_til_ready (was causing chip 0 to
540 * Revision 1.12 1994/07/19 16:42:11 Bentson
541 * add some hackery for kernel version 1.1.8; expand
542 * error messages; refine timing for delay loops and
543 * declare loop params volatile
545 * Revision 1.11 1994/06/11 21:53:10 bentson
546 * get use of save_car right in transmit interrupt service
548 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
549 * add some diagnostic printing; try to fix save_car stuff
551 * Revision 1.10 1994/06/11 20:36:08 bentson
552 * clean up compiler warnings
554 * Revision 1.9 1994/06/11 19:42:46 bentson
555 * added a bunch of code to support modem signalling
557 * Revision 1.8 1994/06/11 17:57:07 bentson
558 * recognize break & parity error
560 * Revision 1.7 1994/06/05 05:51:34 bentson
561 * Reorder baud table to be monotonic; add cli to CP; discard
562 * incoming characters and status if the line isn't open; start to
563 * fold code into cy_throttle; start to port get_serial_info,
564 * set_serial_info, get_modem_info, set_modem_info, and send_break
565 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
566 * get flow control characters from tty struct; invalidate ports w/o
569 * Revision 1.6 1994/05/31 18:42:21 bentson
570 * add a loop-breaker in the interrupt service routine;
571 * note when port is initialized so that it can be shut
572 * down under the right conditions; receive works without
575 * Revision 1.5 1994/05/30 00:55:02 bentson
576 * transmit works without obvious errors
578 * Revision 1.4 1994/05/27 18:46:27 bentson
579 * incorporated more code from lib_y.c; can now print short
580 * strings under interrupt control to port zero; seems to
581 * select ports/channels/lines correctly
583 * Revision 1.3 1994/05/25 22:12:44 bentson
584 * shifting from multi-port on a card to proper multiplexor
585 * data structures; added skeletons of most routines
587 * Revision 1.2 1994/05/19 13:21:43 bentson
588 * start to crib from other sources
592 #define CY_VERSION "2.5"
594 /* If you need to install more boards than NR_CARDS, change the constant
595 in the definition below. No other change is necessary to support up to
596 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
601 If the total number of ports is larger than NR_PORTS, change this
602 constant in the definition below. No other change is necessary to
603 support more boards/ports. */
607 #define ZE_V1_NPORTS 64
612 #define SERIAL_PARANOIA_CHECK
614 #undef CY_DEBUG_THROTTLE
615 #undef CY_DEBUG_OTHER
617 #undef CY_DEBUG_COUNT
619 #undef CY_DEBUG_WAIT_UNTIL_SENT
620 #undef CY_DEBUG_INTERRUPTS
622 #undef CY_ENABLE_MONITORING
628 #include <linux/module.h>
629 #include <linux/errno.h>
630 #include <linux/signal.h>
631 #include <linux/sched.h>
632 #include <linux/timer.h>
633 #include <linux/interrupt.h>
634 #include <linux/tty.h>
635 #include <linux/tty_flip.h>
636 #include <linux/serial.h>
637 #include <linux/major.h>
638 #include <linux/string.h>
639 #include <linux/fcntl.h>
640 #include <linux/ptrace.h>
641 #include <linux/cyclades.h>
642 #include <linux/mm.h>
643 #include <linux/ioport.h>
644 #include <linux/init.h>
645 #include <linux/delay.h>
646 #include <linux/spinlock.h>
647 #include <linux/bitops.h>
648 #include <linux/firmware.h>
649 #include <linux/device.h>
651 #include <asm/system.h>
652 #include <linux/io.h>
654 #include <linux/uaccess.h>
656 #include <linux/kernel.h>
657 #include <linux/pci.h>
659 #include <linux/stat.h>
660 #include <linux/proc_fs.h>
661 #include <linux/seq_file.h>
663 static void cy_throttle(struct tty_struct *tty);
664 static void cy_send_xchar(struct tty_struct *tty, char ch);
666 #define IS_CYC_Z(card) ((card).num_chips == (unsigned int)-1)
668 #define Z_FPGA_CHECK(card) \
669 ((readl(&((struct RUNTIME_9060 __iomem *) \
670 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
672 #define ISZLOADED(card) (((ZO_V1 == readl(&((struct RUNTIME_9060 __iomem *) \
673 ((card).ctl_addr))->mail_box_0)) || \
674 Z_FPGA_CHECK(card)) && \
675 (ZFIRM_ID == readl(&((struct FIRM_ID __iomem *) \
676 ((card).base_addr+ID_ADDRESS))->signature)))
678 #ifndef SERIAL_XMIT_SIZE
679 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
681 #define WAKEUP_CHARS 256
683 #define STD_COM_FLAGS (0)
686 #define ZL_MAX_BLOCKS 16
687 #define DRIVER_VERSION 0x02010203
688 #define RAM_SIZE 0x80000
690 #define Z_FPGA_LOADED(X) ((readl(&(X)->init_ctrl) & (1<<17)) != 0)
697 struct zfile_header {
706 } __attribute__ ((packed));
708 struct zfile_config {
713 u32 block_list[ZL_MAX_BLOCKS];
714 } __attribute__ ((packed));
721 } __attribute__ ((packed));
723 static struct tty_driver *cy_serial_driver;
726 /* This is the address lookup table. The driver will probe for
727 Cyclom-Y/ISA boards at all addresses in here. If you want the
728 driver to probe addresses at a different address, add it to
729 this table. If the driver is probing some other board and
730 causing problems, remove the offending address from this table.
733 static unsigned int cy_isa_addresses[] = {
742 0, 0, 0, 0, 0, 0, 0, 0
745 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
748 static long maddr[NR_CARDS];
749 static int irq[NR_CARDS];
751 module_param_array(maddr, long, NULL, 0);
752 module_param_array(irq, int, NULL, 0);
755 #endif /* CONFIG_ISA */
757 /* This is the per-card data structure containing address, irq, number of
758 channels, etc. This driver supports a maximum of NR_CARDS cards.
760 static struct cyclades_card cy_card[NR_CARDS];
762 static int cy_next_channel; /* next minor available */
765 * This is used to look up the divisor speeds and the timeouts
766 * We're normally limited to 15 distinct baud rates. The extra
767 * are accessed via settings in info->port.flags.
768 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
769 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
773 static int baud_table[] = {
774 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
775 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
779 static char baud_co_25[] = { /* 25 MHz clock option table */
780 /* value => 00 01 02 03 04 */
781 /* divide by 8 32 128 512 2048 */
782 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
783 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
786 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
787 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
788 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
791 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
792 /* value => 00 01 02 03 04 */
793 /* divide by 8 32 128 512 2048 */
794 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
795 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
799 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
800 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
801 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
805 static char baud_cor3[] = { /* receive threshold */
806 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
807 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
812 * The Cyclades driver implements HW flow control as any serial driver.
813 * The cyclades_port structure member rflow and the vector rflow_thr
814 * allows us to take advantage of a special feature in the CD1400 to avoid
815 * data loss even when the system interrupt latency is too high. These flags
816 * are to be used only with very special applications. Setting these flags
817 * requires the use of a special cable (DTR and RTS reversed). In the new
818 * CD1400-based boards (rev. 6.00 or later), there is no need for special
822 static char rflow_thr[] = { /* rflow threshold */
823 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
824 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
828 /* The Cyclom-Ye has placed the sequential chips in non-sequential
829 * address order. This look-up table overcomes that problem.
831 static int cy_chip_offset[] = { 0x0000,
841 /* PCI related definitions */
844 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
846 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
848 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
850 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
852 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
854 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
856 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
858 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
860 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
861 { } /* end of table */
863 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
866 static void cy_start(struct tty_struct *);
867 static void set_line_char(struct cyclades_port *);
868 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
870 static unsigned detect_isa_irq(void __iomem *);
871 #endif /* CONFIG_ISA */
873 #ifndef CONFIG_CYZ_INTR
874 static void cyz_poll(unsigned long);
876 /* The Cyclades-Z polling cycle is defined by this variable */
877 static long cyz_polling_cycle = CZ_DEF_POLL;
879 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
881 #else /* CONFIG_CYZ_INTR */
882 static void cyz_rx_restart(unsigned long);
883 static struct timer_list cyz_rx_full_timer[NR_PORTS];
884 #endif /* CONFIG_CYZ_INTR */
886 static inline int serial_paranoia_check(struct cyclades_port *info,
887 char *name, const char *routine)
889 #ifdef SERIAL_PARANOIA_CHECK
891 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
892 "in %s\n", name, routine);
896 if (info->magic != CYCLADES_MAGIC) {
897 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
898 "struct (%s) in %s\n", name, routine);
903 } /* serial_paranoia_check */
905 /***********************************************************/
906 /********* Start of block of Cyclom-Y specific code ********/
908 /* This routine waits up to 1000 micro-seconds for the previous
909 command to the Cirrus chip to complete and then issues the
910 new command. An error is returned if the previous command
911 didn't finish within the time limit.
913 This function is only called from inside spinlock-protected code.
915 static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
919 /* Check to see that the previous command has completed */
920 for (i = 0; i < 100; i++) {
921 if (readb(base_addr + (CyCCR << index)) == 0)
925 /* if the CCR never cleared, the previous command
926 didn't finish within the "reasonable time" */
930 /* Issue the new command */
931 cy_writeb(base_addr + (CyCCR << index), cmd);
934 } /* cyy_issue_cmd */
937 /* ISA interrupt detection code */
938 static unsigned detect_isa_irq(void __iomem *address)
941 unsigned long irqs, flags;
942 int save_xir, save_car;
943 int index = 0; /* IRQ probing is only for ISA */
945 /* forget possible initially masked and pending IRQ */
946 irq = probe_irq_off(probe_irq_on());
948 /* Clear interrupts on the board first */
949 cy_writeb(address + (Cy_ClrIntr << index), 0);
950 /* Cy_ClrIntr is 0x1800 */
952 irqs = probe_irq_on();
956 /* Enable the Tx interrupts on the CD1400 */
957 local_irq_save(flags);
958 cy_writeb(address + (CyCAR << index), 0);
959 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
961 cy_writeb(address + (CyCAR << index), 0);
962 cy_writeb(address + (CySRER << index),
963 readb(address + (CySRER << index)) | CyTxRdy);
964 local_irq_restore(flags);
969 /* Check which interrupt is in use */
970 irq = probe_irq_off(irqs);
973 save_xir = (u_char) readb(address + (CyTIR << index));
974 save_car = readb(address + (CyCAR << index));
975 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
976 cy_writeb(address + (CySRER << index),
977 readb(address + (CySRER << index)) & ~CyTxRdy);
978 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
979 cy_writeb(address + (CyCAR << index), (save_car));
980 cy_writeb(address + (Cy_ClrIntr << index), 0);
981 /* Cy_ClrIntr is 0x1800 */
983 return (irq > 0) ? irq : 0;
985 #endif /* CONFIG_ISA */
987 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
988 void __iomem *base_addr)
990 struct cyclades_port *info;
991 struct tty_struct *tty;
992 int len, index = cinfo->bus_index;
993 u8 save_xir, channel, save_car, data, char_count;
995 #ifdef CY_DEBUG_INTERRUPTS
996 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
998 /* determine the channel & change to that context */
999 save_xir = readb(base_addr + (CyRIR << index));
1000 channel = save_xir & CyIRChannel;
1001 info = &cinfo->ports[channel + chip * 4];
1002 save_car = readb(base_addr + (CyCAR << index));
1003 cy_writeb(base_addr + (CyCAR << index), save_xir);
1005 /* if there is nowhere to put the data, discard it */
1006 if (info->port.tty == NULL) {
1007 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1008 CyIVRRxEx) { /* exception */
1009 data = readb(base_addr + (CyRDSR << index));
1010 } else { /* normal character reception */
1011 char_count = readb(base_addr + (CyRDCR << index));
1012 while (char_count--)
1013 data = readb(base_addr + (CyRDSR << index));
1017 /* there is an open port for this data */
1018 tty = info->port.tty;
1019 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1020 CyIVRRxEx) { /* exception */
1021 data = readb(base_addr + (CyRDSR << index));
1023 /* For statistics only */
1026 else if (data & CyFRAME)
1027 info->icount.frame++;
1028 else if (data & CyPARITY)
1029 info->icount.parity++;
1030 else if (data & CyOVERRUN)
1031 info->icount.overrun++;
1033 if (data & info->ignore_status_mask) {
1037 if (tty_buffer_request_room(tty, 1)) {
1038 if (data & info->read_status_mask) {
1039 if (data & CyBREAK) {
1040 tty_insert_flip_char(tty,
1041 readb(base_addr + (CyRDSR <<
1042 index)), TTY_BREAK);
1044 if (info->port.flags & ASYNC_SAK)
1046 } else if (data & CyFRAME) {
1047 tty_insert_flip_char(tty,
1048 readb(base_addr + (CyRDSR <<
1049 index)), TTY_FRAME);
1051 info->idle_stats.frame_errs++;
1052 } else if (data & CyPARITY) {
1053 /* Pieces of seven... */
1054 tty_insert_flip_char(tty,
1055 readb(base_addr + (CyRDSR <<
1056 index)), TTY_PARITY);
1058 info->idle_stats.parity_errs++;
1059 } else if (data & CyOVERRUN) {
1060 tty_insert_flip_char(tty, 0,
1063 /* If the flip buffer itself is
1064 overflowing, we still lose
1065 the next incoming character.
1067 tty_insert_flip_char(tty,
1068 readb(base_addr + (CyRDSR <<
1069 index)), TTY_FRAME);
1071 info->idle_stats.overruns++;
1072 /* These two conditions may imply */
1073 /* a normal read should be done. */
1074 /* } else if(data & CyTIMEOUT) { */
1075 /* } else if(data & CySPECHAR) { */
1077 tty_insert_flip_char(tty, 0,
1082 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1086 /* there was a software buffer overrun and nothing
1087 * could be done about it!!! */
1088 info->icount.buf_overrun++;
1089 info->idle_stats.overruns++;
1091 } else { /* normal character reception */
1092 /* load # chars available from the chip */
1093 char_count = readb(base_addr + (CyRDCR << index));
1095 #ifdef CY_ENABLE_MONITORING
1096 ++info->mon.int_count;
1097 info->mon.char_count += char_count;
1098 if (char_count > info->mon.char_max)
1099 info->mon.char_max = char_count;
1100 info->mon.char_last = char_count;
1102 len = tty_buffer_request_room(tty, char_count);
1104 data = readb(base_addr + (CyRDSR << index));
1105 tty_insert_flip_char(tty, data, TTY_NORMAL);
1106 info->idle_stats.recv_bytes++;
1112 info->idle_stats.recv_idle = jiffies;
1114 tty_schedule_flip(tty);
1116 /* end of service */
1117 cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1118 cy_writeb(base_addr + (CyCAR << index), save_car);
1121 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
1122 void __iomem *base_addr)
1124 struct cyclades_port *info;
1125 int char_count, index = cinfo->bus_index;
1126 u8 save_xir, channel, save_car, outch;
1128 /* Since we only get here when the transmit buffer
1129 is empty, we know we can always stuff a dozen
1131 #ifdef CY_DEBUG_INTERRUPTS
1132 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1135 /* determine the channel & change to that context */
1136 save_xir = readb(base_addr + (CyTIR << index));
1137 channel = save_xir & CyIRChannel;
1138 save_car = readb(base_addr + (CyCAR << index));
1139 cy_writeb(base_addr + (CyCAR << index), save_xir);
1141 /* validate the port# (as configured and open) */
1142 if (channel + chip * 4 >= cinfo->nports) {
1143 cy_writeb(base_addr + (CySRER << index),
1144 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1147 info = &cinfo->ports[channel + chip * 4];
1148 if (info->port.tty == NULL) {
1149 cy_writeb(base_addr + (CySRER << index),
1150 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1154 /* load the on-chip space for outbound data */
1155 char_count = info->xmit_fifo_size;
1157 if (info->x_char) { /* send special char */
1158 outch = info->x_char;
1159 cy_writeb(base_addr + (CyTDR << index), outch);
1165 if (info->breakon || info->breakoff) {
1166 if (info->breakon) {
1167 cy_writeb(base_addr + (CyTDR << index), 0);
1168 cy_writeb(base_addr + (CyTDR << index), 0x81);
1172 if (info->breakoff) {
1173 cy_writeb(base_addr + (CyTDR << index), 0);
1174 cy_writeb(base_addr + (CyTDR << index), 0x83);
1180 while (char_count-- > 0) {
1181 if (!info->xmit_cnt) {
1182 if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1183 cy_writeb(base_addr + (CySRER << index),
1184 readb(base_addr + (CySRER << index)) &
1187 cy_writeb(base_addr + (CySRER << index),
1188 (readb(base_addr + (CySRER << index)) &
1189 ~CyTxRdy) | CyTxMpty);
1193 if (info->port.xmit_buf == NULL) {
1194 cy_writeb(base_addr + (CySRER << index),
1195 readb(base_addr + (CySRER << index)) &
1199 if (info->port.tty->stopped || info->port.tty->hw_stopped) {
1200 cy_writeb(base_addr + (CySRER << index),
1201 readb(base_addr + (CySRER << index)) &
1205 /* Because the Embedded Transmit Commands have been enabled,
1206 * we must check to see if the escape character, NULL, is being
1207 * sent. If it is, we must ensure that there is room for it to
1208 * be doubled in the output stream. Therefore we no longer
1209 * advance the pointer when the character is fetched, but
1210 * rather wait until after the check for a NULL output
1211 * character. This is necessary because there may not be room
1212 * for the two chars needed to send a NULL.)
1214 outch = info->port.xmit_buf[info->xmit_tail];
1217 info->xmit_tail = (info->xmit_tail + 1) &
1218 (SERIAL_XMIT_SIZE - 1);
1219 cy_writeb(base_addr + (CyTDR << index), outch);
1222 if (char_count > 1) {
1224 info->xmit_tail = (info->xmit_tail + 1) &
1225 (SERIAL_XMIT_SIZE - 1);
1226 cy_writeb(base_addr + (CyTDR << index), outch);
1227 cy_writeb(base_addr + (CyTDR << index), 0);
1235 tty_wakeup(info->port.tty);
1237 /* end of service */
1238 cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1239 cy_writeb(base_addr + (CyCAR << index), save_car);
1242 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1243 void __iomem *base_addr)
1245 struct cyclades_port *info;
1246 int index = cinfo->bus_index;
1247 u8 save_xir, channel, save_car, mdm_change, mdm_status;
1249 /* determine the channel & change to that context */
1250 save_xir = readb(base_addr + (CyMIR << index));
1251 channel = save_xir & CyIRChannel;
1252 info = &cinfo->ports[channel + chip * 4];
1253 save_car = readb(base_addr + (CyCAR << index));
1254 cy_writeb(base_addr + (CyCAR << index), save_xir);
1256 mdm_change = readb(base_addr + (CyMISR << index));
1257 mdm_status = readb(base_addr + (CyMSVR1 << index));
1259 if (!info->port.tty)
1262 if (mdm_change & CyANY_DELTA) {
1263 /* For statistics only */
1264 if (mdm_change & CyDCD)
1266 if (mdm_change & CyCTS)
1268 if (mdm_change & CyDSR)
1270 if (mdm_change & CyRI)
1273 wake_up_interruptible(&info->delta_msr_wait);
1276 if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
1277 if (!(mdm_status & CyDCD)) {
1278 tty_hangup(info->port.tty);
1279 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1281 wake_up_interruptible(&info->port.open_wait);
1283 if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
1284 if (info->port.tty->hw_stopped) {
1285 if (mdm_status & CyCTS) {
1286 /* cy_start isn't used
1288 info->port.tty->hw_stopped = 0;
1289 cy_writeb(base_addr + (CySRER << index),
1290 readb(base_addr + (CySRER << index)) |
1292 tty_wakeup(info->port.tty);
1295 if (!(mdm_status & CyCTS)) {
1296 /* cy_stop isn't used
1298 info->port.tty->hw_stopped = 1;
1299 cy_writeb(base_addr + (CySRER << index),
1300 readb(base_addr + (CySRER << index)) &
1305 /* if (mdm_change & CyDSR) {
1307 if (mdm_change & CyRI) {
1310 /* end of service */
1311 cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1312 cy_writeb(base_addr + (CyCAR << index), save_car);
1315 /* The real interrupt service routine is called
1316 whenever the card wants its hand held--chars
1317 received, out buffer empty, modem change, etc.
1319 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1322 struct cyclades_card *cinfo = dev_id;
1323 void __iomem *base_addr, *card_base_addr;
1324 unsigned int chip, too_many, had_work;
1327 if (unlikely(cinfo == NULL)) {
1328 #ifdef CY_DEBUG_INTERRUPTS
1329 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
1332 return IRQ_NONE; /* spurious interrupt */
1335 card_base_addr = cinfo->base_addr;
1336 index = cinfo->bus_index;
1338 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1339 if (unlikely(card_base_addr == NULL))
1342 /* This loop checks all chips in the card. Make a note whenever
1343 _any_ chip had some work to do, as this is considered an
1344 indication that there will be more to do. Only when no chip
1345 has any work does this outermost loop exit.
1349 for (chip = 0; chip < cinfo->num_chips; chip++) {
1350 base_addr = cinfo->base_addr +
1351 (cy_chip_offset[chip] << index);
1353 while ((status = readb(base_addr +
1354 (CySVRR << index))) != 0x00) {
1356 /* The purpose of the following test is to ensure that
1357 no chip can monopolize the driver. This forces the
1358 chips to be checked in a round-robin fashion (after
1359 draining each of a bunch (1000) of characters).
1361 if (1000 < too_many++)
1363 spin_lock(&cinfo->card_lock);
1364 if (status & CySRReceive) /* rx intr */
1365 cyy_chip_rx(cinfo, chip, base_addr);
1366 if (status & CySRTransmit) /* tx intr */
1367 cyy_chip_tx(cinfo, chip, base_addr);
1368 if (status & CySRModem) /* modem intr */
1369 cyy_chip_modem(cinfo, chip, base_addr);
1370 spin_unlock(&cinfo->card_lock);
1375 /* clear interrupts */
1376 spin_lock(&cinfo->card_lock);
1377 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1378 /* Cy_ClrIntr is 0x1800 */
1379 spin_unlock(&cinfo->card_lock);
1381 } /* cyy_interrupt */
1383 /***********************************************************/
1384 /********* End of block of Cyclom-Y specific code **********/
1385 /******** Start of block of Cyclades-Z specific code *******/
1386 /***********************************************************/
1389 cyz_fetch_msg(struct cyclades_card *cinfo,
1390 __u32 *channel, __u8 *cmd, __u32 *param)
1392 struct FIRM_ID __iomem *firm_id;
1393 struct ZFW_CTRL __iomem *zfw_ctrl;
1394 struct BOARD_CTRL __iomem *board_ctrl;
1395 unsigned long loc_doorbell;
1397 firm_id = cinfo->base_addr + ID_ADDRESS;
1398 if (!ISZLOADED(*cinfo))
1400 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1401 board_ctrl = &zfw_ctrl->board_ctrl;
1403 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1404 (cinfo->ctl_addr))->loc_doorbell);
1406 *cmd = (char)(0xff & loc_doorbell);
1407 *channel = readl(&board_ctrl->fwcmd_channel);
1408 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1409 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1410 loc_doorbell, 0xffffffff);
1414 } /* cyz_fetch_msg */
1417 cyz_issue_cmd(struct cyclades_card *cinfo,
1418 __u32 channel, __u8 cmd, __u32 param)
1420 struct FIRM_ID __iomem *firm_id;
1421 struct ZFW_CTRL __iomem *zfw_ctrl;
1422 struct BOARD_CTRL __iomem *board_ctrl;
1423 __u32 __iomem *pci_doorbell;
1426 firm_id = cinfo->base_addr + ID_ADDRESS;
1427 if (!ISZLOADED(*cinfo))
1430 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1431 board_ctrl = &zfw_ctrl->board_ctrl;
1435 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1436 while ((readl(pci_doorbell) & 0xff) != 0) {
1437 if (index++ == 1000)
1438 return (int)(readl(pci_doorbell) & 0xff);
1441 cy_writel(&board_ctrl->hcmd_channel, channel);
1442 cy_writel(&board_ctrl->hcmd_param, param);
1443 cy_writel(pci_doorbell, (long)cmd);
1446 } /* cyz_issue_cmd */
1448 static void cyz_handle_rx(struct cyclades_port *info,
1449 struct BUF_CTRL __iomem *buf_ctrl)
1451 struct cyclades_card *cinfo = info->card;
1452 struct tty_struct *tty = info->port.tty;
1453 unsigned int char_count;
1460 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1462 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1463 rx_put = readl(&buf_ctrl->rx_put);
1464 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1465 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1466 if (rx_put >= rx_get)
1467 char_count = rx_put - rx_get;
1469 char_count = rx_put - rx_get + rx_bufsize;
1472 #ifdef CY_ENABLE_MONITORING
1473 info->mon.int_count++;
1474 info->mon.char_count += char_count;
1475 if (char_count > info->mon.char_max)
1476 info->mon.char_max = char_count;
1477 info->mon.char_last = char_count;
1480 /* flush received characters */
1481 new_rx_get = (new_rx_get + char_count) &
1483 info->rflush_count++;
1486 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1487 for performance, but because of buffer boundaries, there
1488 may be several steps to the operation */
1490 len = tty_prepare_flip_string(tty, &buf,
1495 len = min_t(unsigned int, min(len, char_count),
1496 rx_bufsize - new_rx_get);
1498 memcpy_fromio(buf, cinfo->base_addr +
1499 rx_bufaddr + new_rx_get, len);
1501 new_rx_get = (new_rx_get + len) &
1504 info->icount.rx += len;
1505 info->idle_stats.recv_bytes += len;
1508 len = tty_buffer_request_room(tty, char_count);
1510 data = readb(cinfo->base_addr + rx_bufaddr +
1512 new_rx_get = (new_rx_get + 1) &
1514 tty_insert_flip_char(tty, data, TTY_NORMAL);
1515 info->idle_stats.recv_bytes++;
1519 #ifdef CONFIG_CYZ_INTR
1520 /* Recalculate the number of chars in the RX buffer and issue
1521 a cmd in case it's higher than the RX high water mark */
1522 rx_put = readl(&buf_ctrl->rx_put);
1523 if (rx_put >= rx_get)
1524 char_count = rx_put - rx_get;
1526 char_count = rx_put - rx_get + rx_bufsize;
1527 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1528 !timer_pending(&cyz_rx_full_timer[
1530 mod_timer(&cyz_rx_full_timer[info->line],
1533 info->idle_stats.recv_idle = jiffies;
1534 tty_schedule_flip(tty);
1537 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1541 static void cyz_handle_tx(struct cyclades_port *info,
1542 struct BUF_CTRL __iomem *buf_ctrl)
1544 struct cyclades_card *cinfo = info->card;
1545 struct tty_struct *tty = info->port.tty;
1547 unsigned int char_count;
1551 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1553 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1556 tx_get = readl(&buf_ctrl->tx_get);
1557 tx_put = readl(&buf_ctrl->tx_put);
1558 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1559 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1560 if (tx_put >= tx_get)
1561 char_count = tx_get - tx_put - 1 + tx_bufsize;
1563 char_count = tx_get - tx_put - 1;
1570 if (info->x_char) { /* send special char */
1571 data = info->x_char;
1573 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1574 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1580 while (0 < (small_count = min_t(unsigned int,
1581 tx_bufsize - tx_put, min_t(unsigned int,
1582 (SERIAL_XMIT_SIZE - info->xmit_tail),
1583 min_t(unsigned int, info->xmit_cnt,
1586 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1588 &info->port.xmit_buf[info->xmit_tail],
1591 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1592 char_count -= small_count;
1593 info->icount.tx += small_count;
1594 info->xmit_cnt -= small_count;
1595 info->xmit_tail = (info->xmit_tail + small_count) &
1596 (SERIAL_XMIT_SIZE - 1);
1599 while (info->xmit_cnt && char_count) {
1600 data = info->port.xmit_buf[info->xmit_tail];
1602 info->xmit_tail = (info->xmit_tail + 1) &
1603 (SERIAL_XMIT_SIZE - 1);
1605 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1606 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1614 cy_writel(&buf_ctrl->tx_put, tx_put);
1618 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1620 struct tty_struct *tty;
1621 struct cyclades_port *info;
1622 static struct FIRM_ID __iomem *firm_id;
1623 static struct ZFW_CTRL __iomem *zfw_ctrl;
1624 static struct BOARD_CTRL __iomem *board_ctrl;
1625 static struct CH_CTRL __iomem *ch_ctrl;
1626 static struct BUF_CTRL __iomem *buf_ctrl;
1630 __u32 hw_ver, fw_ver;
1634 firm_id = cinfo->base_addr + ID_ADDRESS;
1635 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1636 board_ctrl = &zfw_ctrl->board_ctrl;
1637 fw_ver = readl(&board_ctrl->fw_version);
1638 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1641 while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
1644 info = &cinfo->ports[channel];
1645 tty = info->port.tty;
1649 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1650 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1654 tty_insert_flip_char(tty, 0, TTY_PARITY);
1659 tty_insert_flip_char(tty, 0, TTY_FRAME);
1664 tty_insert_flip_char(tty, 0, TTY_BREAK);
1671 if (info->port.flags & ASYNC_CHECK_CD) {
1672 if ((fw_ver > 241 ? ((u_long) param) :
1673 readl(&ch_ctrl->rs_status)) &
1675 wake_up_interruptible(&info->port.open_wait);
1677 tty_hangup(info->port.tty);
1678 wake_up_interruptible(&info->port.open_wait);
1679 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1697 complete(&info->shutdown_wait);
1700 #ifdef CONFIG_CYZ_INTR
1704 /* Reception Interrupt */
1705 #ifdef CY_DEBUG_INTERRUPTS
1706 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1707 "port %ld\n", info->card, channel);
1709 cyz_handle_rx(info, buf_ctrl);
1714 /* Transmission Interrupt */
1715 #ifdef CY_DEBUG_INTERRUPTS
1716 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1717 "port %ld\n", info->card, channel);
1719 cyz_handle_tx(info, buf_ctrl);
1721 #endif /* CONFIG_CYZ_INTR */
1723 /* should do something with this !!! */
1729 wake_up_interruptible(&info->delta_msr_wait);
1731 tty_schedule_flip(tty);
1735 #ifdef CONFIG_CYZ_INTR
1736 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1738 struct cyclades_card *cinfo = dev_id;
1740 if (unlikely(!ISZLOADED(*cinfo))) {
1741 #ifdef CY_DEBUG_INTERRUPTS
1742 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1748 /* Handle the interrupts */
1749 cyz_handle_cmd(cinfo);
1752 } /* cyz_interrupt */
1754 static void cyz_rx_restart(unsigned long arg)
1756 struct cyclades_port *info = (struct cyclades_port *)arg;
1757 struct cyclades_card *card = info->card;
1759 __u32 channel = info->line - card->first_line;
1760 unsigned long flags;
1762 spin_lock_irqsave(&card->card_lock, flags);
1763 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1765 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1766 info->line, retval);
1768 spin_unlock_irqrestore(&card->card_lock, flags);
1771 #else /* CONFIG_CYZ_INTR */
1773 static void cyz_poll(unsigned long arg)
1775 struct cyclades_card *cinfo;
1776 struct cyclades_port *info;
1777 struct tty_struct *tty;
1778 struct FIRM_ID __iomem *firm_id;
1779 struct ZFW_CTRL __iomem *zfw_ctrl;
1780 struct BOARD_CTRL __iomem *board_ctrl;
1781 struct BUF_CTRL __iomem *buf_ctrl;
1782 unsigned long expires = jiffies + HZ;
1783 unsigned int port, card;
1785 for (card = 0; card < NR_CARDS; card++) {
1786 cinfo = &cy_card[card];
1788 if (!IS_CYC_Z(*cinfo))
1790 if (!ISZLOADED(*cinfo))
1793 firm_id = cinfo->base_addr + ID_ADDRESS;
1794 zfw_ctrl = cinfo->base_addr +
1795 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1796 board_ctrl = &(zfw_ctrl->board_ctrl);
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 cinfo->intr_enabled = 1;
1805 cyz_handle_cmd(cinfo);
1807 for (port = 0; port < cinfo->nports; port++) {
1808 info = &cinfo->ports[port];
1809 tty = info->port.tty;
1810 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1812 if (!info->throttle)
1813 cyz_handle_rx(info, buf_ctrl);
1814 cyz_handle_tx(info, buf_ctrl);
1816 /* poll every 'cyz_polling_cycle' period */
1817 expires = jiffies + cyz_polling_cycle;
1819 mod_timer(&cyz_timerlist, expires);
1822 #endif /* CONFIG_CYZ_INTR */
1824 /********** End of block of Cyclades-Z specific code *********/
1825 /***********************************************************/
1827 /* This is called whenever a port becomes active;
1828 interrupts are enabled and DTR & RTS are turned on.
1830 static int startup(struct cyclades_port *info)
1832 struct cyclades_card *card;
1833 unsigned long flags;
1835 void __iomem *base_addr;
1836 int chip, channel, index;
1840 channel = info->line - card->first_line;
1842 page = get_zeroed_page(GFP_KERNEL);
1846 spin_lock_irqsave(&card->card_lock, flags);
1848 if (info->port.flags & ASYNC_INITIALIZED) {
1855 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1860 if (info->port.xmit_buf)
1863 info->port.xmit_buf = (unsigned char *)page;
1865 spin_unlock_irqrestore(&card->card_lock, flags);
1867 set_line_char(info);
1869 if (!IS_CYC_Z(*card)) {
1870 chip = channel >> 2;
1872 index = card->bus_index;
1873 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1875 #ifdef CY_DEBUG_OPEN
1876 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1878 card, chip, channel, base_addr);
1880 spin_lock_irqsave(&card->card_lock, flags);
1882 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1884 cy_writeb(base_addr + (CyRTPR << index),
1885 (info->default_timeout ? info->default_timeout : 0x02));
1886 /* 10ms rx timeout */
1888 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1891 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1892 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1893 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1896 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1897 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
1898 readb(base_addr + (CyMSVR1 << index)),
1899 readb(base_addr + (CyMSVR2 << index)));
1902 cy_writeb(base_addr + (CySRER << index),
1903 readb(base_addr + (CySRER << index)) | CyRxData);
1904 info->port.flags |= ASYNC_INITIALIZED;
1907 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1908 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1909 info->breakon = info->breakoff = 0;
1910 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1911 info->idle_stats.in_use =
1912 info->idle_stats.recv_idle =
1913 info->idle_stats.xmit_idle = jiffies;
1915 spin_unlock_irqrestore(&card->card_lock, flags);
1918 struct FIRM_ID __iomem *firm_id;
1919 struct ZFW_CTRL __iomem *zfw_ctrl;
1920 struct BOARD_CTRL __iomem *board_ctrl;
1921 struct CH_CTRL __iomem *ch_ctrl;
1923 base_addr = card->base_addr;
1925 firm_id = base_addr + ID_ADDRESS;
1926 if (!ISZLOADED(*card))
1929 zfw_ctrl = card->base_addr +
1930 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1931 board_ctrl = &zfw_ctrl->board_ctrl;
1932 ch_ctrl = zfw_ctrl->ch_ctrl;
1934 #ifdef CY_DEBUG_OPEN
1935 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1936 "base_addr %p\n", card, channel, base_addr);
1938 spin_lock_irqsave(&card->card_lock, flags);
1940 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1942 #ifdef CONFIG_CYZ_INTR
1943 cy_writel(&ch_ctrl[channel].intr_enable,
1944 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1945 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1947 cy_writel(&ch_ctrl[channel].intr_enable,
1948 C_IN_IOCTLW | C_IN_MDCD);
1949 #endif /* CONFIG_CYZ_INTR */
1951 #ifdef CONFIG_CYZ_INTR
1952 cy_writel(&ch_ctrl[channel].intr_enable,
1953 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1954 C_IN_RXNNDT | C_IN_MDCD);
1956 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1957 #endif /* CONFIG_CYZ_INTR */
1960 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1962 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1963 "%x\n", info->line, retval);
1966 /* Flush RX buffers before raising DTR and RTS */
1967 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1969 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1970 "%x\n", info->line, retval);
1973 /* set timeout !!! */
1974 /* set RTS and DTR !!! */
1975 cy_writel(&ch_ctrl[channel].rs_control,
1976 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
1978 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
1980 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1981 "%x\n", info->line, retval);
1984 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1987 /* enable send, recv, modem !!! */
1989 info->port.flags |= ASYNC_INITIALIZED;
1991 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1992 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1993 info->breakon = info->breakoff = 0;
1994 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1995 info->idle_stats.in_use =
1996 info->idle_stats.recv_idle =
1997 info->idle_stats.xmit_idle = jiffies;
1999 spin_unlock_irqrestore(&card->card_lock, flags);
2002 #ifdef CY_DEBUG_OPEN
2003 printk(KERN_DEBUG "cyc startup done\n");
2008 spin_unlock_irqrestore(&card->card_lock, flags);
2012 static void start_xmit(struct cyclades_port *info)
2014 struct cyclades_card *card;
2015 unsigned long flags;
2016 void __iomem *base_addr;
2017 int chip, channel, index;
2020 channel = info->line - card->first_line;
2021 if (!IS_CYC_Z(*card)) {
2022 chip = channel >> 2;
2024 index = card->bus_index;
2025 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2027 spin_lock_irqsave(&card->card_lock, flags);
2028 cy_writeb(base_addr + (CyCAR << index), channel);
2029 cy_writeb(base_addr + (CySRER << index),
2030 readb(base_addr + (CySRER << index)) | CyTxRdy);
2031 spin_unlock_irqrestore(&card->card_lock, flags);
2033 #ifdef CONFIG_CYZ_INTR
2036 spin_lock_irqsave(&card->card_lock, flags);
2037 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2039 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2040 "%x\n", info->line, retval);
2042 spin_unlock_irqrestore(&card->card_lock, flags);
2043 #else /* CONFIG_CYZ_INTR */
2044 /* Don't have to do anything at this time */
2045 #endif /* CONFIG_CYZ_INTR */
2050 * This routine shuts down a serial port; interrupts are disabled,
2051 * and DTR is dropped if the hangup on close termio flag is on.
2053 static void shutdown(struct cyclades_port *info)
2055 struct cyclades_card *card;
2056 unsigned long flags;
2057 void __iomem *base_addr;
2058 int chip, channel, index;
2060 if (!(info->port.flags & ASYNC_INITIALIZED))
2064 channel = info->line - card->first_line;
2065 if (!IS_CYC_Z(*card)) {
2066 chip = channel >> 2;
2068 index = card->bus_index;
2069 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2071 #ifdef CY_DEBUG_OPEN
2072 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2073 "channel %d, base_addr %p\n",
2074 card, chip, channel, base_addr);
2077 spin_lock_irqsave(&card->card_lock, flags);
2079 /* Clear delta_msr_wait queue to avoid mem leaks. */
2080 wake_up_interruptible(&info->delta_msr_wait);
2082 if (info->port.xmit_buf) {
2083 unsigned char *temp;
2084 temp = info->port.xmit_buf;
2085 info->port.xmit_buf = NULL;
2086 free_page((unsigned long)temp);
2088 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2089 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
2090 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2091 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2093 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2094 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2095 readb(base_addr + (CyMSVR1 << index)),
2096 readb(base_addr + (CyMSVR2 << index)));
2099 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2100 /* it may be appropriate to clear _XMIT at
2101 some later date (after testing)!!! */
2104 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2105 info->port.flags &= ~ASYNC_INITIALIZED;
2106 spin_unlock_irqrestore(&card->card_lock, flags);
2108 struct FIRM_ID __iomem *firm_id;
2109 struct ZFW_CTRL __iomem *zfw_ctrl;
2110 struct BOARD_CTRL __iomem *board_ctrl;
2111 struct CH_CTRL __iomem *ch_ctrl;
2114 base_addr = card->base_addr;
2115 #ifdef CY_DEBUG_OPEN
2116 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2117 "base_addr %p\n", card, channel, base_addr);
2120 firm_id = base_addr + ID_ADDRESS;
2121 if (!ISZLOADED(*card))
2124 zfw_ctrl = card->base_addr +
2125 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2126 board_ctrl = &zfw_ctrl->board_ctrl;
2127 ch_ctrl = zfw_ctrl->ch_ctrl;
2129 spin_lock_irqsave(&card->card_lock, flags);
2131 if (info->port.xmit_buf) {
2132 unsigned char *temp;
2133 temp = info->port.xmit_buf;
2134 info->port.xmit_buf = NULL;
2135 free_page((unsigned long)temp);
2138 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
2139 cy_writel(&ch_ctrl[channel].rs_control,
2140 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2141 ~(C_RS_RTS | C_RS_DTR)));
2142 retval = cyz_issue_cmd(info->card, channel,
2145 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2146 "was %x\n", info->line, retval);
2149 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2154 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2155 info->port.flags &= ~ASYNC_INITIALIZED;
2157 spin_unlock_irqrestore(&card->card_lock, flags);
2160 #ifdef CY_DEBUG_OPEN
2161 printk(KERN_DEBUG "cyc shutdown done\n");
2166 * ------------------------------------------------------------
2167 * cy_open() and friends
2168 * ------------------------------------------------------------
2172 block_til_ready(struct tty_struct *tty, struct file *filp,
2173 struct cyclades_port *info)
2175 DECLARE_WAITQUEUE(wait, current);
2176 struct cyclades_card *cinfo;
2177 unsigned long flags;
2178 int chip, channel, index;
2180 void __iomem *base_addr;
2183 channel = info->line - cinfo->first_line;
2186 * If the device is in the middle of being closed, then block
2187 * until it's done, and then try again.
2189 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2190 wait_event_interruptible(info->port.close_wait,
2191 !(info->port.flags & ASYNC_CLOSING));
2192 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2196 * If non-blocking mode is set, then make the check up front
2199 if ((filp->f_flags & O_NONBLOCK) ||
2200 (tty->flags & (1 << TTY_IO_ERROR))) {
2201 info->port.flags |= ASYNC_NORMAL_ACTIVE;
2206 * Block waiting for the carrier detect and the line to become
2207 * free (i.e., not in use by the callout). While we are in
2208 * this loop, info->port.count is dropped by one, so that
2209 * cy_close() knows when to free things. We restore it upon
2210 * exit, either normal or abnormal.
2213 add_wait_queue(&info->port.open_wait, &wait);
2214 #ifdef CY_DEBUG_OPEN
2215 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2216 "count = %d\n", info->line, info->port.count);
2218 spin_lock_irqsave(&cinfo->card_lock, flags);
2219 if (!tty_hung_up_p(filp))
2221 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2222 #ifdef CY_DEBUG_COUNT
2223 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2224 "%d\n", current->pid, info->port.count);
2226 info->port.blocked_open++;
2228 if (!IS_CYC_Z(*cinfo)) {
2229 chip = channel >> 2;
2231 index = cinfo->bus_index;
2232 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2235 spin_lock_irqsave(&cinfo->card_lock, flags);
2236 if ((tty->termios->c_cflag & CBAUD)) {
2237 cy_writeb(base_addr + (CyCAR << index),
2239 cy_writeb(base_addr + (CyMSVR1 << index),
2241 cy_writeb(base_addr + (CyMSVR2 << index),
2244 printk(KERN_DEBUG "cyc:block_til_ready raising "
2246 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2247 readb(base_addr + (CyMSVR1 << index)),
2248 readb(base_addr + (CyMSVR2 << index)));
2251 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2253 set_current_state(TASK_INTERRUPTIBLE);
2254 if (tty_hung_up_p(filp) ||
2255 !(info->port.flags & ASYNC_INITIALIZED)) {
2256 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2257 -EAGAIN : -ERESTARTSYS);
2261 spin_lock_irqsave(&cinfo->card_lock, flags);
2262 cy_writeb(base_addr + (CyCAR << index),
2264 if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2266 (CyMSVR1 << index)) & CyDCD))) {
2267 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2270 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2272 if (signal_pending(current)) {
2273 retval = -ERESTARTSYS;
2276 #ifdef CY_DEBUG_OPEN
2277 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2278 "ttyC%d, count = %d\n",
2279 info->line, info->port.count);
2284 struct FIRM_ID __iomem *firm_id;
2285 struct ZFW_CTRL __iomem *zfw_ctrl;
2286 struct BOARD_CTRL __iomem *board_ctrl;
2287 struct CH_CTRL __iomem *ch_ctrl;
2289 base_addr = cinfo->base_addr;
2290 firm_id = base_addr + ID_ADDRESS;
2291 if (!ISZLOADED(*cinfo)) {
2292 __set_current_state(TASK_RUNNING);
2293 remove_wait_queue(&info->port.open_wait, &wait);
2297 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
2299 board_ctrl = &zfw_ctrl->board_ctrl;
2300 ch_ctrl = zfw_ctrl->ch_ctrl;
2303 if ((tty->termios->c_cflag & CBAUD)) {
2304 cy_writel(&ch_ctrl[channel].rs_control,
2305 readl(&ch_ctrl[channel].rs_control) |
2306 C_RS_RTS | C_RS_DTR);
2307 retval = cyz_issue_cmd(cinfo,
2308 channel, C_CM_IOCTLM, 0L);
2310 printk(KERN_ERR "cyc:block_til_ready "
2311 "retval on ttyC%d was %x\n",
2312 info->line, retval);
2315 printk(KERN_DEBUG "cyc:block_til_ready raising "
2320 set_current_state(TASK_INTERRUPTIBLE);
2321 if (tty_hung_up_p(filp) ||
2322 !(info->port.flags & ASYNC_INITIALIZED)) {
2323 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2324 -EAGAIN : -ERESTARTSYS);
2327 if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2328 (readl(&ch_ctrl[channel].rs_status) &
2332 if (signal_pending(current)) {
2333 retval = -ERESTARTSYS;
2336 #ifdef CY_DEBUG_OPEN
2337 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2338 "ttyC%d, count = %d\n",
2339 info->line, info->port.count);
2344 __set_current_state(TASK_RUNNING);
2345 remove_wait_queue(&info->port.open_wait, &wait);
2346 if (!tty_hung_up_p(filp)) {
2348 #ifdef CY_DEBUG_COUNT
2349 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2350 "count to %d\n", current->pid, info->port.count);
2353 info->port.blocked_open--;
2354 #ifdef CY_DEBUG_OPEN
2355 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2356 "count = %d\n", info->line, info->port.count);
2360 info->port.flags |= ASYNC_NORMAL_ACTIVE;
2362 } /* block_til_ready */
2365 * This routine is called whenever a serial port is opened. It
2366 * performs the serial-specific initialization for the tty structure.
2368 static int cy_open(struct tty_struct *tty, struct file *filp)
2370 struct cyclades_port *info;
2371 unsigned int i, line;
2375 if (tty->index < 0 || NR_PORTS <= line)
2378 for (i = 0; i < NR_CARDS; i++)
2379 if (line < cy_card[i].first_line + cy_card[i].nports &&
2380 line >= cy_card[i].first_line)
2384 info = &cy_card[i].ports[line - cy_card[i].first_line];
2388 /* If the card's firmware hasn't been loaded,
2389 treat it as absent from the system. This
2390 will make the user pay attention.
2392 if (IS_CYC_Z(*info->card)) {
2393 struct cyclades_card *cinfo = info->card;
2394 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2396 if (!ISZLOADED(*cinfo)) {
2397 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2398 (cinfo->ctl_addr))->mail_box_0)) &&
2399 Z_FPGA_CHECK(*cinfo)) &&
2400 (ZFIRM_HLT == readl(
2401 &firm_id->signature))) {
2402 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2403 "need an external power supply for "
2404 "this number of ports.\nFirmware "
2407 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2412 #ifdef CONFIG_CYZ_INTR
2414 /* In case this Z board is operating in interrupt mode, its
2415 interrupts should be enabled as soon as the first open
2416 happens to one of its ports. */
2417 if (!cinfo->intr_enabled) {
2418 struct ZFW_CTRL __iomem *zfw_ctrl;
2419 struct BOARD_CTRL __iomem *board_ctrl;
2421 zfw_ctrl = cinfo->base_addr +
2422 (readl(&firm_id->zfwctrl_addr) &
2425 board_ctrl = &zfw_ctrl->board_ctrl;
2427 /* Enable interrupts on the PLX chip */
2428 cy_writew(cinfo->ctl_addr + 0x68,
2429 readw(cinfo->ctl_addr + 0x68) | 0x0900);
2430 /* Enable interrupts on the FW */
2431 retval = cyz_issue_cmd(cinfo, 0,
2434 printk(KERN_ERR "cyc:IRQ enable retval "
2435 "was %x\n", retval);
2438 (int)readl(&board_ctrl->n_channel);
2439 cinfo->intr_enabled = 1;
2442 #endif /* CONFIG_CYZ_INTR */
2443 /* Make sure this Z port really exists in hardware */
2444 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2447 #ifdef CY_DEBUG_OTHER
2448 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2450 tty->driver_data = info;
2451 info->port.tty = tty;
2452 if (serial_paranoia_check(info, tty->name, "cy_open"))
2455 #ifdef CY_DEBUG_OPEN
2456 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2460 #ifdef CY_DEBUG_COUNT
2461 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2462 current->pid, info->port.count);
2466 * If the port is the middle of closing, bail out now
2468 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2469 wait_event_interruptible(info->port.close_wait,
2470 !(info->port.flags & ASYNC_CLOSING));
2471 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2475 * Start up serial port
2477 retval = startup(info);
2481 retval = block_til_ready(tty, filp, info);
2483 #ifdef CY_DEBUG_OPEN
2484 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2485 "with %d\n", retval);
2492 #ifdef CY_DEBUG_OPEN
2493 printk(KERN_DEBUG "cyc:cy_open done\n");
2499 * cy_wait_until_sent() --- wait until the transmitter is empty
2501 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2503 struct cyclades_card *card;
2504 struct cyclades_port *info = tty->driver_data;
2505 void __iomem *base_addr;
2506 int chip, channel, index;
2507 unsigned long orig_jiffies;
2510 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2513 if (info->xmit_fifo_size == 0)
2514 return; /* Just in case.... */
2516 orig_jiffies = jiffies;
2519 * Set the check interval to be 1/5 of the estimated time to
2520 * send a single character, and make it at least 1. The check
2521 * interval should also be less than the timeout.
2523 * Note: we have to use pretty tight timings here to satisfy
2526 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2527 char_time = char_time / 5;
2533 char_time = min(char_time, timeout);
2535 * If the transmitter hasn't cleared in twice the approximate
2536 * amount of time to send the entire FIFO, it probably won't
2537 * ever clear. This assumes the UART isn't doing flow
2538 * control, which is currently the case. Hence, if it ever
2539 * takes longer than info->timeout, this is probably due to a
2540 * UART bug of some kind. So, we clamp the timeout parameter at
2543 if (!timeout || timeout > 2 * info->timeout)
2544 timeout = 2 * info->timeout;
2545 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2546 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2547 timeout, char_time, jiffies);
2550 channel = (info->line) - (card->first_line);
2551 if (!IS_CYC_Z(*card)) {
2552 chip = channel >> 2;
2554 index = card->bus_index;
2555 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2556 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2557 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2558 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2560 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2562 if (timeout && time_after(jiffies, orig_jiffies +
2567 /* Run one more char cycle */
2568 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2570 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2571 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2575 static void cy_flush_buffer(struct tty_struct *tty)
2577 struct cyclades_port *info = tty->driver_data;
2578 struct cyclades_card *card;
2579 int channel, retval;
2580 unsigned long flags;
2583 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
2586 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
2590 channel = info->line - card->first_line;
2592 spin_lock_irqsave(&card->card_lock, flags);
2593 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2594 spin_unlock_irqrestore(&card->card_lock, flags);
2596 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
2598 spin_lock_irqsave(&card->card_lock, flags);
2599 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
2601 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
2602 "was %x\n", info->line, retval);
2604 spin_unlock_irqrestore(&card->card_lock, flags);
2607 } /* cy_flush_buffer */
2611 * This routine is called when a particular tty device is closed.
2613 static void cy_close(struct tty_struct *tty, struct file *filp)
2615 struct cyclades_port *info = tty->driver_data;
2616 struct cyclades_card *card;
2617 unsigned long flags;
2619 #ifdef CY_DEBUG_OTHER
2620 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2623 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
2628 spin_lock_irqsave(&card->card_lock, flags);
2629 /* If the TTY is being hung up, nothing to do */
2630 if (tty_hung_up_p(filp)) {
2631 spin_unlock_irqrestore(&card->card_lock, flags);
2634 #ifdef CY_DEBUG_OPEN
2635 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2638 if ((tty->count == 1) && (info->port.count != 1)) {
2640 * Uh, oh. tty->count is 1, which means that the tty
2641 * structure will be freed. Info->count should always
2642 * be one in these conditions. If it's greater than
2643 * one, we've got real problems, since it means the
2644 * serial port won't be shutdown.
2646 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2647 "tty->count is 1, info->port.count is %d\n", info->port.count);
2648 info->port.count = 1;
2650 #ifdef CY_DEBUG_COUNT
2651 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
2652 current->pid, info->port.count - 1);
2654 if (--info->port.count < 0) {
2655 #ifdef CY_DEBUG_COUNT
2656 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2658 info->port.count = 0;
2660 if (info->port.count) {
2661 spin_unlock_irqrestore(&card->card_lock, flags);
2664 info->port.flags |= ASYNC_CLOSING;
2667 * Now we wait for the transmit buffer to clear; and we notify
2668 * the line discipline to only process XON/XOFF characters.
2671 spin_unlock_irqrestore(&card->card_lock, flags);
2672 if (info->port.closing_wait != CY_CLOSING_WAIT_NONE)
2673 tty_wait_until_sent(tty, info->port.closing_wait);
2675 spin_lock_irqsave(&card->card_lock, flags);
2677 if (!IS_CYC_Z(*card)) {
2678 int channel = info->line - card->first_line;
2679 int index = card->bus_index;
2680 void __iomem *base_addr = card->base_addr +
2681 (cy_chip_offset[channel >> 2] << index);
2682 /* Stop accepting input */
2684 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2685 cy_writeb(base_addr + (CySRER << index),
2686 readb(base_addr + (CySRER << index)) & ~CyRxData);
2687 if (info->port.flags & ASYNC_INITIALIZED) {
2688 /* Waiting for on-board buffers to be empty before
2690 spin_unlock_irqrestore(&card->card_lock, flags);
2691 cy_wait_until_sent(tty, info->timeout);
2692 spin_lock_irqsave(&card->card_lock, flags);
2696 /* Waiting for on-board buffers to be empty before closing
2698 void __iomem *base_addr = card->base_addr;
2699 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2700 struct ZFW_CTRL __iomem *zfw_ctrl =
2701 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2702 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2703 int channel = info->line - card->first_line;
2706 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2707 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2709 printk(KERN_DEBUG "cyc:cy_close retval on "
2710 "ttyC%d was %x\n", info->line, retval);
2712 spin_unlock_irqrestore(&card->card_lock, flags);
2713 wait_for_completion_interruptible(&info->shutdown_wait);
2714 spin_lock_irqsave(&card->card_lock, flags);
2719 spin_unlock_irqrestore(&card->card_lock, flags);
2721 cy_flush_buffer(tty);
2722 tty_ldisc_flush(tty);
2723 spin_lock_irqsave(&card->card_lock, flags);
2726 info->port.tty = NULL;
2727 if (info->port.blocked_open) {
2728 spin_unlock_irqrestore(&card->card_lock, flags);
2729 if (info->port.close_delay) {
2730 msleep_interruptible(jiffies_to_msecs
2731 (info->port.close_delay));
2733 wake_up_interruptible(&info->port.open_wait);
2734 spin_lock_irqsave(&card->card_lock, flags);
2736 info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2737 wake_up_interruptible(&info->port.close_wait);
2739 #ifdef CY_DEBUG_OTHER
2740 printk(KERN_DEBUG "cyc:cy_close done\n");
2743 spin_unlock_irqrestore(&card->card_lock, flags);
2746 /* This routine gets called when tty_write has put something into
2747 * the write_queue. The characters may come from user space or
2750 * This routine will return the number of characters actually
2751 * accepted for writing.
2753 * If the port is not already transmitting stuff, start it off by
2754 * enabling interrupts. The interrupt service routine will then
2755 * ensure that the characters are sent.
2756 * If the port is already active, there is no need to kick it.
2759 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2761 struct cyclades_port *info = tty->driver_data;
2762 unsigned long flags;
2766 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2769 if (serial_paranoia_check(info, tty->name, "cy_write"))
2772 if (!info->port.xmit_buf)
2775 spin_lock_irqsave(&info->card->card_lock, flags);
2777 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2778 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
2783 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
2784 info->xmit_head = (info->xmit_head + c) &
2785 (SERIAL_XMIT_SIZE - 1);
2786 info->xmit_cnt += c;
2791 spin_unlock_irqrestore(&info->card->card_lock, flags);
2793 info->idle_stats.xmit_bytes += ret;
2794 info->idle_stats.xmit_idle = jiffies;
2796 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
2803 * This routine is called by the kernel to write a single
2804 * character to the tty device. If the kernel uses this routine,
2805 * it must call the flush_chars() routine (if defined) when it is
2806 * done stuffing characters into the driver. If there is no room
2807 * in the queue, the character is ignored.
2809 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
2811 struct cyclades_port *info = tty->driver_data;
2812 unsigned long flags;
2815 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2818 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2821 if (!info->port.xmit_buf)
2824 spin_lock_irqsave(&info->card->card_lock, flags);
2825 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2826 spin_unlock_irqrestore(&info->card->card_lock, flags);
2830 info->port.xmit_buf[info->xmit_head++] = ch;
2831 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2833 info->idle_stats.xmit_bytes++;
2834 info->idle_stats.xmit_idle = jiffies;
2835 spin_unlock_irqrestore(&info->card->card_lock, flags);
2840 * This routine is called by the kernel after it has written a
2841 * series of characters to the tty device using put_char().
2843 static void cy_flush_chars(struct tty_struct *tty)
2845 struct cyclades_port *info = tty->driver_data;
2848 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2851 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2854 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2855 !info->port.xmit_buf)
2859 } /* cy_flush_chars */
2862 * This routine returns the numbers of characters the tty driver
2863 * will accept for queuing to be written. This number is subject
2864 * to change as output buffers get emptied, or if the output flow
2865 * control is activated.
2867 static int cy_write_room(struct tty_struct *tty)
2869 struct cyclades_port *info = tty->driver_data;
2873 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2876 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2878 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2882 } /* cy_write_room */
2884 static int cy_chars_in_buffer(struct tty_struct *tty)
2886 struct cyclades_card *card;
2887 struct cyclades_port *info = tty->driver_data;
2890 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2894 channel = (info->line) - (card->first_line);
2896 #ifdef Z_EXT_CHARS_IN_BUFFER
2897 if (!IS_CYC_Z(cy_card[card])) {
2898 #endif /* Z_EXT_CHARS_IN_BUFFER */
2900 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2901 info->line, info->xmit_cnt);
2903 return info->xmit_cnt;
2904 #ifdef Z_EXT_CHARS_IN_BUFFER
2906 static struct FIRM_ID *firm_id;
2907 static struct ZFW_CTRL *zfw_ctrl;
2908 static struct CH_CTRL *ch_ctrl;
2909 static struct BUF_CTRL *buf_ctrl;
2911 __u32 tx_put, tx_get, tx_bufsize;
2914 firm_id = card->base_addr + ID_ADDRESS;
2915 zfw_ctrl = card->base_addr +
2916 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2917 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2918 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2920 tx_get = readl(&buf_ctrl->tx_get);
2921 tx_put = readl(&buf_ctrl->tx_put);
2922 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2923 if (tx_put >= tx_get)
2924 char_count = tx_put - tx_get;
2926 char_count = tx_put - tx_get + tx_bufsize;
2928 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2929 info->line, info->xmit_cnt + char_count);
2932 return info->xmit_cnt + char_count;
2934 #endif /* Z_EXT_CHARS_IN_BUFFER */
2935 } /* cy_chars_in_buffer */
2938 * ------------------------------------------------------------
2939 * cy_ioctl() and friends
2940 * ------------------------------------------------------------
2943 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2945 int co, co_val, bpr;
2946 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2950 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2954 /* determine which prescaler to use */
2955 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2956 if (cy_clock / co_val / baud > 63)
2960 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2964 info->tbpr = info->rbpr = bpr;
2965 info->tco = info->rco = co;
2969 * This routine finds or computes the various line characteristics.
2970 * It used to be called config_setup
2972 static void set_line_char(struct cyclades_port *info)
2974 struct cyclades_card *card;
2975 unsigned long flags;
2976 void __iomem *base_addr;
2977 int chip, channel, index;
2978 unsigned cflag, iflag;
2979 unsigned short chip_number;
2980 int baud, baud_rate = 0;
2983 if (!info->port.tty || !info->port.tty->termios)
2986 if (info->line == -1)
2989 cflag = info->port.tty->termios->c_cflag;
2990 iflag = info->port.tty->termios->c_iflag;
2993 * Set up the tty->alt_speed kludge
2995 if (info->port.tty) {
2996 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2997 info->port.tty->alt_speed = 57600;
2998 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2999 info->port.tty->alt_speed = 115200;
3000 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3001 info->port.tty->alt_speed = 230400;
3002 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3003 info->port.tty->alt_speed = 460800;
3007 channel = info->line - card->first_line;
3008 chip_number = channel / 4;
3010 if (!IS_CYC_Z(*card)) {
3012 index = card->bus_index;
3015 baud = tty_get_baud_rate(info->port.tty);
3016 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3018 if (info->custom_divisor)
3019 baud_rate = info->baud / info->custom_divisor;
3021 baud_rate = info->baud;
3022 } else if (baud > CD1400_MAX_SPEED) {
3023 baud = CD1400_MAX_SPEED;
3025 /* find the baud index */
3026 for (i = 0; i < 20; i++) {
3027 if (baud == baud_table[i])
3031 i = 19; /* CD1400_MAX_SPEED */
3033 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3035 cyy_baud_calc(info, baud_rate);
3037 if (info->chip_rev >= CD1400_REV_J) {
3038 /* It is a CD1400 rev. J or later */
3039 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3040 info->tco = baud_co_60[i]; /* Tx CO */
3041 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3042 info->rco = baud_co_60[i]; /* Rx CO */
3044 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3045 info->tco = baud_co_25[i]; /* Tx CO */
3046 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3047 info->rco = baud_co_25[i]; /* Rx CO */
3050 if (baud_table[i] == 134) {
3051 /* get it right for 134.5 baud */
3052 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3054 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3056 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3058 } else if (baud_table[i]) {
3059 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3061 /* this needs to be propagated into the card info */
3065 /* By tradition (is it a standard?) a baud rate of zero
3066 implies the line should be/has been closed. A bit
3067 later in this routine such a test is performed. */
3069 /* byte size and parity */
3072 /* receive threshold */
3073 info->cor3 = (info->default_threshold ?
3074 info->default_threshold : baud_cor3[i]);
3076 switch (cflag & CSIZE) {
3078 info->cor1 = Cy_5_BITS;
3081 info->cor1 = Cy_6_BITS;
3084 info->cor1 = Cy_7_BITS;
3087 info->cor1 = Cy_8_BITS;
3091 info->cor1 |= Cy_2_STOP;
3093 if (cflag & PARENB) {
3095 info->cor1 |= CyPARITY_O;
3097 info->cor1 |= CyPARITY_E;
3099 info->cor1 |= CyPARITY_NONE;
3101 /* CTS flow control flag */
3102 if (cflag & CRTSCTS) {
3103 info->port.flags |= ASYNC_CTS_FLOW;
3104 info->cor2 |= CyCtsAE;
3106 info->port.flags &= ~ASYNC_CTS_FLOW;
3107 info->cor2 &= ~CyCtsAE;
3110 info->port.flags &= ~ASYNC_CHECK_CD;
3112 info->port.flags |= ASYNC_CHECK_CD;
3114 /***********************************************
3115 The hardware option, CyRtsAO, presents RTS when
3116 the chip has characters to send. Since most modems
3117 use RTS as reverse (inbound) flow control, this
3118 option is not used. If inbound flow control is
3119 necessary, DTR can be programmed to provide the
3120 appropriate signals for use with a non-standard
3121 cable. Contact Marcio Saito for details.
3122 ***********************************************/
3124 chip = channel >> 2;
3126 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3128 spin_lock_irqsave(&card->card_lock, flags);
3129 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3131 /* tx and rx baud rate */
3133 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3134 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3135 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3136 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3138 /* set line characteristics according configuration */
3140 cy_writeb(base_addr + (CySCHR1 << index),
3141 START_CHAR(info->port.tty));
3142 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->port.tty));
3143 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3144 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3145 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3146 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3147 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3149 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3152 /* !!! Is this needed? */
3153 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3154 cy_writeb(base_addr + (CyRTPR << index),
3155 (info->default_timeout ? info->default_timeout : 0x02));
3156 /* 10ms rx timeout */
3158 if (C_CLOCAL(info->port.tty)) {
3159 /* without modem intr */
3160 cy_writeb(base_addr + (CySRER << index),
3161 readb(base_addr + (CySRER << index)) | CyMdmCh);
3162 /* act on 1->0 modem transitions */
3163 if ((cflag & CRTSCTS) && info->rflow) {
3164 cy_writeb(base_addr + (CyMCOR1 << index),
3165 (CyCTS | rflow_thr[i]));
3167 cy_writeb(base_addr + (CyMCOR1 << index),
3170 /* act on 0->1 modem transitions */
3171 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3173 /* without modem intr */
3174 cy_writeb(base_addr + (CySRER << index),
3176 (CySRER << index)) | CyMdmCh);
3177 /* act on 1->0 modem transitions */
3178 if ((cflag & CRTSCTS) && info->rflow) {
3179 cy_writeb(base_addr + (CyMCOR1 << index),
3180 (CyDSR | CyCTS | CyRI | CyDCD |
3183 cy_writeb(base_addr + (CyMCOR1 << index),
3184 CyDSR | CyCTS | CyRI | CyDCD);
3186 /* act on 0->1 modem transitions */
3187 cy_writeb(base_addr + (CyMCOR2 << index),
3188 CyDSR | CyCTS | CyRI | CyDCD);
3191 if (i == 0) { /* baud rate is zero, turn off line */
3192 if (info->rtsdtr_inv) {
3193 cy_writeb(base_addr + (CyMSVR1 << index),
3196 cy_writeb(base_addr + (CyMSVR2 << index),
3200 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3201 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3202 readb(base_addr + (CyMSVR1 << index)),
3203 readb(base_addr + (CyMSVR2 << index)));
3206 if (info->rtsdtr_inv) {
3207 cy_writeb(base_addr + (CyMSVR1 << index),
3210 cy_writeb(base_addr + (CyMSVR2 << index),
3214 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3215 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3216 readb(base_addr + (CyMSVR1 << index)),
3217 readb(base_addr + (CyMSVR2 << index)));
3222 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
3223 spin_unlock_irqrestore(&card->card_lock, flags);
3226 struct FIRM_ID __iomem *firm_id;
3227 struct ZFW_CTRL __iomem *zfw_ctrl;
3228 struct BOARD_CTRL __iomem *board_ctrl;
3229 struct CH_CTRL __iomem *ch_ctrl;
3230 struct BUF_CTRL __iomem *buf_ctrl;
3234 firm_id = card->base_addr + ID_ADDRESS;
3235 if (!ISZLOADED(*card))
3238 zfw_ctrl = card->base_addr +
3239 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3240 board_ctrl = &zfw_ctrl->board_ctrl;
3241 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3242 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3245 baud = tty_get_baud_rate(info->port.tty);
3246 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3248 if (info->custom_divisor)
3249 baud_rate = info->baud / info->custom_divisor;
3251 baud_rate = info->baud;
3252 } else if (baud > CYZ_MAX_SPEED) {
3253 baud = CYZ_MAX_SPEED;
3255 cy_writel(&ch_ctrl->comm_baud, baud);
3258 /* get it right for 134.5 baud */
3259 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3261 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3263 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3266 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3268 /* this needs to be propagated into the card info */
3273 /* byte size and parity */
3274 switch (cflag & CSIZE) {
3276 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3279 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3282 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3285 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3288 if (cflag & CSTOPB) {
3289 cy_writel(&ch_ctrl->comm_data_l,
3290 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3292 cy_writel(&ch_ctrl->comm_data_l,
3293 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3295 if (cflag & PARENB) {
3297 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3299 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3301 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3303 /* CTS flow control flag */
3304 if (cflag & CRTSCTS) {
3305 cy_writel(&ch_ctrl->hw_flow,
3306 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3308 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3309 ~(C_RS_CTS | C_RS_RTS));
3311 /* As the HW flow control is done in firmware, the driver
3312 doesn't need to care about it */
3313 info->port.flags &= ~ASYNC_CTS_FLOW;
3315 /* XON/XOFF/XANY flow control flags */
3318 sw_flow |= C_FL_OXX;
3320 sw_flow |= C_FL_OIXANY;
3322 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3324 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3326 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3327 "was %x\n", info->line, retval);
3330 /* CD sensitivity */
3332 info->port.flags &= ~ASYNC_CHECK_CD;
3334 info->port.flags |= ASYNC_CHECK_CD;
3336 if (baud == 0) { /* baud rate is zero, turn off line */
3337 cy_writel(&ch_ctrl->rs_control,
3338 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3340 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3343 cy_writel(&ch_ctrl->rs_control,
3344 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3346 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3350 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3352 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3353 "was %x\n", info->line, retval);
3357 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
3359 } /* set_line_char */
3362 get_serial_info(struct cyclades_port *info,
3363 struct serial_struct __user *retinfo)
3365 struct serial_struct tmp;
3366 struct cyclades_card *cinfo = info->card;
3370 memset(&tmp, 0, sizeof(tmp));
3371 tmp.type = info->type;
3372 tmp.line = info->line;
3373 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3375 tmp.irq = cinfo->irq;
3376 tmp.flags = info->port.flags;
3377 tmp.close_delay = info->port.close_delay;
3378 tmp.closing_wait = info->port.closing_wait;
3379 tmp.baud_base = info->baud;
3380 tmp.custom_divisor = info->custom_divisor;
3381 tmp.hub6 = 0; /*!!! */
3382 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3383 } /* get_serial_info */
3386 set_serial_info(struct cyclades_port *info,
3387 struct serial_struct __user *new_info)
3389 struct serial_struct new_serial;
3390 struct cyclades_port old_info;
3392 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3396 if (!capable(CAP_SYS_ADMIN)) {
3397 if (new_serial.close_delay != info->port.close_delay ||
3398 new_serial.baud_base != info->baud ||
3399 (new_serial.flags & ASYNC_FLAGS &
3401 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3403 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
3404 (new_serial.flags & ASYNC_USR_MASK);
3405 info->baud = new_serial.baud_base;
3406 info->custom_divisor = new_serial.custom_divisor;
3407 goto check_and_exit;
3411 * OK, past this point, all the error checking has been done.
3412 * At this point, we start making changes.....
3415 info->baud = new_serial.baud_base;
3416 info->custom_divisor = new_serial.custom_divisor;
3417 info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
3418 (new_serial.flags & ASYNC_FLAGS);
3419 info->port.close_delay = new_serial.close_delay * HZ / 100;
3420 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
3423 if (info->port.flags & ASYNC_INITIALIZED) {
3424 set_line_char(info);
3427 return startup(info);
3429 } /* set_serial_info */
3432 * get_lsr_info - get line status register info
3434 * Purpose: Let user call ioctl() to get info when the UART physically
3435 * is emptied. On bus types like RS485, the transmitter must
3436 * release the bus after transmitting. This must be done when
3437 * the transmit shift register is empty, not be done when the
3438 * transmit holding register is empty. This functionality
3439 * allows an RS485 driver to be written in user space.
3441 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
3443 struct cyclades_card *card;
3444 int chip, channel, index;
3445 unsigned char status;
3446 unsigned int result;
3447 unsigned long flags;
3448 void __iomem *base_addr;
3451 channel = (info->line) - (card->first_line);
3452 if (!IS_CYC_Z(*card)) {
3453 chip = channel >> 2;
3455 index = card->bus_index;
3456 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3458 spin_lock_irqsave(&card->card_lock, flags);
3459 status = readb(base_addr + (CySRER << index)) &
3460 (CyTxRdy | CyTxMpty);
3461 spin_unlock_irqrestore(&card->card_lock, flags);
3462 result = (status ? 0 : TIOCSER_TEMT);
3464 /* Not supported yet */
3467 return put_user(result, (unsigned long __user *)value);
3470 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3472 struct cyclades_port *info = tty->driver_data;
3473 struct cyclades_card *card;
3474 int chip, channel, index;
3475 void __iomem *base_addr;
3476 unsigned long flags;
3477 unsigned char status;
3478 unsigned long lstatus;
3479 unsigned int result;
3480 struct FIRM_ID __iomem *firm_id;
3481 struct ZFW_CTRL __iomem *zfw_ctrl;
3482 struct BOARD_CTRL __iomem *board_ctrl;
3483 struct CH_CTRL __iomem *ch_ctrl;
3485 if (serial_paranoia_check(info, tty->name, __func__))
3491 channel = info->line - card->first_line;
3492 if (!IS_CYC_Z(*card)) {
3493 chip = channel >> 2;
3495 index = card->bus_index;
3496 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3498 spin_lock_irqsave(&card->card_lock, flags);
3499 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3500 status = readb(base_addr + (CyMSVR1 << index));
3501 status |= readb(base_addr + (CyMSVR2 << index));
3502 spin_unlock_irqrestore(&card->card_lock, flags);
3504 if (info->rtsdtr_inv) {
3505 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3506 ((status & CyDTR) ? TIOCM_RTS : 0);
3508 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3509 ((status & CyDTR) ? TIOCM_DTR : 0);
3511 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3512 ((status & CyRI) ? TIOCM_RNG : 0) |
3513 ((status & CyDSR) ? TIOCM_DSR : 0) |
3514 ((status & CyCTS) ? TIOCM_CTS : 0);
3516 base_addr = card->base_addr;
3517 firm_id = card->base_addr + ID_ADDRESS;
3518 if (ISZLOADED(*card)) {
3519 zfw_ctrl = card->base_addr +
3520 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3521 board_ctrl = &zfw_ctrl->board_ctrl;
3522 ch_ctrl = zfw_ctrl->ch_ctrl;
3523 lstatus = readl(&ch_ctrl[channel].rs_status);
3524 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3525 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3526 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3527 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3528 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3529 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3542 cy_tiocmset(struct tty_struct *tty, struct file *file,
3543 unsigned int set, unsigned int clear)
3545 struct cyclades_port *info = tty->driver_data;
3546 struct cyclades_card *card;
3547 int chip, channel, index;
3548 void __iomem *base_addr;
3549 unsigned long flags;
3550 struct FIRM_ID __iomem *firm_id;
3551 struct ZFW_CTRL __iomem *zfw_ctrl;
3552 struct BOARD_CTRL __iomem *board_ctrl;
3553 struct CH_CTRL __iomem *ch_ctrl;
3556 if (serial_paranoia_check(info, tty->name, __func__))
3560 channel = (info->line) - (card->first_line);
3561 if (!IS_CYC_Z(*card)) {
3562 chip = channel >> 2;
3564 index = card->bus_index;
3565 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3567 if (set & TIOCM_RTS) {
3568 spin_lock_irqsave(&card->card_lock, flags);
3569 cy_writeb(base_addr + (CyCAR << index),
3571 if (info->rtsdtr_inv) {
3572 cy_writeb(base_addr + (CyMSVR2 << index),
3575 cy_writeb(base_addr + (CyMSVR1 << index),
3578 spin_unlock_irqrestore(&card->card_lock, flags);
3580 if (clear & TIOCM_RTS) {
3581 spin_lock_irqsave(&card->card_lock, flags);
3582 cy_writeb(base_addr + (CyCAR << index),
3584 if (info->rtsdtr_inv) {
3585 cy_writeb(base_addr + (CyMSVR2 << index),
3588 cy_writeb(base_addr + (CyMSVR1 << index),
3591 spin_unlock_irqrestore(&card->card_lock, flags);
3593 if (set & TIOCM_DTR) {
3594 spin_lock_irqsave(&card->card_lock, flags);
3595 cy_writeb(base_addr + (CyCAR << index),
3597 if (info->rtsdtr_inv) {
3598 cy_writeb(base_addr + (CyMSVR1 << index),
3601 cy_writeb(base_addr + (CyMSVR2 << index),
3605 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3606 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3607 readb(base_addr + (CyMSVR1 << index)),
3608 readb(base_addr + (CyMSVR2 << index)));
3610 spin_unlock_irqrestore(&card->card_lock, flags);
3612 if (clear & TIOCM_DTR) {
3613 spin_lock_irqsave(&card->card_lock, flags);
3614 cy_writeb(base_addr + (CyCAR << index),
3616 if (info->rtsdtr_inv) {
3617 cy_writeb(base_addr + (CyMSVR1 << index),
3620 cy_writeb(base_addr + (CyMSVR2 << index),
3625 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3626 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3627 readb(base_addr + (CyMSVR1 << index)),
3628 readb(base_addr + (CyMSVR2 << index)));
3630 spin_unlock_irqrestore(&card->card_lock, flags);
3633 base_addr = card->base_addr;
3635 firm_id = card->base_addr + ID_ADDRESS;
3636 if (ISZLOADED(*card)) {
3637 zfw_ctrl = card->base_addr +
3638 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3639 board_ctrl = &zfw_ctrl->board_ctrl;
3640 ch_ctrl = zfw_ctrl->ch_ctrl;
3642 if (set & TIOCM_RTS) {
3643 spin_lock_irqsave(&card->card_lock, flags);
3644 cy_writel(&ch_ctrl[channel].rs_control,
3645 readl(&ch_ctrl[channel].rs_control) |
3647 spin_unlock_irqrestore(&card->card_lock, flags);
3649 if (clear & TIOCM_RTS) {
3650 spin_lock_irqsave(&card->card_lock, flags);
3651 cy_writel(&ch_ctrl[channel].rs_control,
3652 readl(&ch_ctrl[channel].rs_control) &
3654 spin_unlock_irqrestore(&card->card_lock, flags);
3656 if (set & TIOCM_DTR) {
3657 spin_lock_irqsave(&card->card_lock, flags);
3658 cy_writel(&ch_ctrl[channel].rs_control,
3659 readl(&ch_ctrl[channel].rs_control) |
3662 printk(KERN_DEBUG "cyc:set_modem_info raising "
3665 spin_unlock_irqrestore(&card->card_lock, flags);
3667 if (clear & TIOCM_DTR) {
3668 spin_lock_irqsave(&card->card_lock, flags);
3669 cy_writel(&ch_ctrl[channel].rs_control,
3670 readl(&ch_ctrl[channel].rs_control) &
3673 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3676 spin_unlock_irqrestore(&card->card_lock, flags);
3681 spin_lock_irqsave(&card->card_lock, flags);
3682 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3684 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3685 "was %x\n", info->line, retval);
3687 spin_unlock_irqrestore(&card->card_lock, flags);
3693 * cy_break() --- routine which turns the break handling on or off
3695 static int cy_break(struct tty_struct *tty, int break_state)
3697 struct cyclades_port *info = tty->driver_data;
3698 struct cyclades_card *card;
3699 unsigned long flags;
3702 if (serial_paranoia_check(info, tty->name, "cy_break"))
3707 spin_lock_irqsave(&card->card_lock, flags);
3708 if (!IS_CYC_Z(*card)) {
3709 /* Let the transmit ISR take care of this (since it
3710 requires stuffing characters into the output stream).
3712 if (break_state == -1) {
3713 if (!info->breakon) {
3715 if (!info->xmit_cnt) {
3716 spin_unlock_irqrestore(&card->card_lock, flags);
3718 spin_lock_irqsave(&card->card_lock, flags);
3722 if (!info->breakoff) {
3724 if (!info->xmit_cnt) {
3725 spin_unlock_irqrestore(&card->card_lock, flags);
3727 spin_lock_irqsave(&card->card_lock, flags);
3732 if (break_state == -1) {
3733 retval = cyz_issue_cmd(card,
3734 info->line - card->first_line,
3735 C_CM_SET_BREAK, 0L);
3737 printk(KERN_ERR "cyc:cy_break (set) retval on "
3738 "ttyC%d was %x\n", info->line, retval);
3741 retval = cyz_issue_cmd(card,
3742 info->line - card->first_line,
3743 C_CM_CLR_BREAK, 0L);
3745 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3746 "on ttyC%d was %x\n", info->line,
3751 spin_unlock_irqrestore(&card->card_lock, flags);
3755 static int get_mon_info(struct cyclades_port *info,
3756 struct cyclades_monitor __user *mon)
3759 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3761 info->mon.int_count = 0;
3762 info->mon.char_count = 0;
3763 info->mon.char_max = 0;
3764 info->mon.char_last = 0;
3766 } /* get_mon_info */
3768 static int set_threshold(struct cyclades_port *info, unsigned long value)
3770 struct cyclades_card *card;
3771 void __iomem *base_addr;
3772 int channel, chip, index;
3773 unsigned long flags;
3776 channel = info->line - card->first_line;
3777 if (!IS_CYC_Z(*card)) {
3778 chip = channel >> 2;
3780 index = card->bus_index;
3782 card->base_addr + (cy_chip_offset[chip] << index);
3784 info->cor3 &= ~CyREC_FIFO;
3785 info->cor3 |= value & CyREC_FIFO;
3787 spin_lock_irqsave(&card->card_lock, flags);
3788 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3789 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3790 spin_unlock_irqrestore(&card->card_lock, flags);
3793 } /* set_threshold */
3795 static int get_threshold(struct cyclades_port *info,
3796 unsigned long __user *value)
3798 struct cyclades_card *card;
3799 void __iomem *base_addr;
3800 int channel, chip, index;
3804 channel = info->line - card->first_line;
3805 if (!IS_CYC_Z(*card)) {
3806 chip = channel >> 2;
3808 index = card->bus_index;
3809 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3811 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3812 return put_user(tmp, value);
3815 } /* get_threshold */
3817 static int set_default_threshold(struct cyclades_port *info,
3818 unsigned long value)
3820 info->default_threshold = value & 0x0f;
3822 } /* set_default_threshold */
3824 static int get_default_threshold(struct cyclades_port *info,
3825 unsigned long __user *value)
3827 return put_user(info->default_threshold, value);
3828 } /* get_default_threshold */
3830 static int set_timeout(struct cyclades_port *info, unsigned long value)
3832 struct cyclades_card *card;
3833 void __iomem *base_addr;
3834 int channel, chip, index;
3835 unsigned long flags;
3838 channel = info->line - card->first_line;
3839 if (!IS_CYC_Z(*card)) {
3840 chip = channel >> 2;
3842 index = card->bus_index;
3843 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3845 spin_lock_irqsave(&card->card_lock, flags);
3846 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3847 spin_unlock_irqrestore(&card->card_lock, flags);
3852 static int get_timeout(struct cyclades_port *info,
3853 unsigned long __user *value)
3855 struct cyclades_card *card;
3856 void __iomem *base_addr;
3857 int channel, chip, index;
3861 channel = info->line - card->first_line;
3862 if (!IS_CYC_Z(*card)) {
3863 chip = channel >> 2;
3865 index = card->bus_index;
3866 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3868 tmp = readb(base_addr + (CyRTPR << index));
3869 return put_user(tmp, value);
3874 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3876 info->default_timeout = value & 0xff;
3878 } /* set_default_timeout */
3880 static int get_default_timeout(struct cyclades_port *info,
3881 unsigned long __user *value)
3883 return put_user(info->default_timeout, value);
3884 } /* get_default_timeout */
3887 * This routine allows the tty driver to implement device-
3888 * specific ioctl's. If the ioctl number passed in cmd is
3889 * not recognized by the driver, it should return ENOIOCTLCMD.
3892 cy_ioctl(struct tty_struct *tty, struct file *file,
3893 unsigned int cmd, unsigned long arg)
3895 struct cyclades_port *info = tty->driver_data;
3896 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3897 struct serial_icounter_struct __user *p_cuser; /* user space */
3899 unsigned long flags;
3900 void __user *argp = (void __user *)arg;
3902 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3905 #ifdef CY_DEBUG_OTHER
3906 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3907 info->line, cmd, arg);
3913 ret_val = get_mon_info(info, argp);
3916 ret_val = get_threshold(info, argp);
3919 ret_val = set_threshold(info, arg);
3921 case CYGETDEFTHRESH:
3922 ret_val = get_default_threshold(info, argp);
3924 case CYSETDEFTHRESH:
3925 ret_val = set_default_threshold(info, arg);
3928 ret_val = get_timeout(info, argp);
3931 ret_val = set_timeout(info, arg);
3933 case CYGETDEFTIMEOUT:
3934 ret_val = get_default_timeout(info, argp);
3936 case CYSETDEFTIMEOUT:
3937 ret_val = set_default_timeout(info, arg);
3940 info->rflow = (int)arg;
3944 ret_val = info->rflow;
3946 case CYSETRTSDTR_INV:
3947 info->rtsdtr_inv = (int)arg;
3950 case CYGETRTSDTR_INV:
3951 ret_val = info->rtsdtr_inv;
3953 case CYGETCD1400VER:
3954 ret_val = info->chip_rev;
3956 #ifndef CONFIG_CYZ_INTR
3957 case CYZSETPOLLCYCLE:
3958 cyz_polling_cycle = (arg * HZ) / 1000;
3961 case CYZGETPOLLCYCLE:
3962 ret_val = (cyz_polling_cycle * 1000) / HZ;
3964 #endif /* CONFIG_CYZ_INTR */
3966 info->port.closing_wait = (unsigned short)arg * HZ / 100;
3970 ret_val = info->port.closing_wait / (HZ / 100);
3973 ret_val = get_serial_info(info, argp);
3976 ret_val = set_serial_info(info, argp);
3978 case TIOCSERGETLSR: /* Get line status register */
3979 ret_val = get_lsr_info(info, argp);
3982 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3983 * - mask passed in arg for lines of interest
3984 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3985 * Caller should use TIOCGICOUNT to see which one it was
3988 spin_lock_irqsave(&info->card->card_lock, flags);
3989 /* note the counters on entry */
3990 cnow = info->icount;
3991 spin_unlock_irqrestore(&info->card->card_lock, flags);
3992 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
3994 spin_lock_irqsave(&info->card->card_lock, flags);
3995 cnow = info->icount; /* atomic copy */
3996 spin_unlock_irqrestore(&info->card->card_lock, flags);
3998 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
3999 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4000 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4001 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4006 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4007 * Return: write counters to the user passed counter struct
4008 * NB: both 1->0 and 0->1 transitions are counted except for
4009 * RI where only 0->1 is counted.
4012 spin_lock_irqsave(&info->card->card_lock, flags);
4013 cnow = info->icount;
4014 spin_unlock_irqrestore(&info->card->card_lock, flags);
4016 ret_val = put_user(cnow.cts, &p_cuser->cts);
4019 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4022 ret_val = put_user(cnow.rng, &p_cuser->rng);
4025 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4028 ret_val = put_user(cnow.rx, &p_cuser->rx);
4031 ret_val = put_user(cnow.tx, &p_cuser->tx);
4034 ret_val = put_user(cnow.frame, &p_cuser->frame);
4037 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4040 ret_val = put_user(cnow.parity, &p_cuser->parity);
4043 ret_val = put_user(cnow.brk, &p_cuser->brk);
4046 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4052 ret_val = -ENOIOCTLCMD;
4056 #ifdef CY_DEBUG_OTHER
4057 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4063 * This routine allows the tty driver to be notified when
4064 * device's termios settings have changed. Note that a
4065 * well-designed tty driver should be prepared to accept the case
4066 * where old == NULL, and try to do something rational.
4068 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4070 struct cyclades_port *info = tty->driver_data;
4072 #ifdef CY_DEBUG_OTHER
4073 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4076 set_line_char(info);
4078 if ((old_termios->c_cflag & CRTSCTS) &&
4079 !(tty->termios->c_cflag & CRTSCTS)) {
4080 tty->hw_stopped = 0;
4085 * No need to wake up processes in open wait, since they
4086 * sample the CLOCAL flag once, and don't recheck it.
4087 * XXX It's not clear whether the current behavior is correct
4088 * or not. Hence, this may change.....
4090 if (!(old_termios->c_cflag & CLOCAL) &&
4091 (tty->termios->c_cflag & CLOCAL))
4092 wake_up_interruptible(&info->port.open_wait);
4094 } /* cy_set_termios */
4096 /* This function is used to send a high-priority XON/XOFF character to
4099 static void cy_send_xchar(struct tty_struct *tty, char ch)
4101 struct cyclades_port *info = tty->driver_data;
4102 struct cyclades_card *card;
4105 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4114 channel = info->line - card->first_line;
4116 if (IS_CYC_Z(*card)) {
4117 if (ch == STOP_CHAR(tty))
4118 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4119 else if (ch == START_CHAR(tty))
4120 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4124 /* This routine is called by the upper-layer tty layer to signal
4125 that incoming characters should be throttled because the input
4126 buffers are close to full.
4128 static void cy_throttle(struct tty_struct *tty)
4130 struct cyclades_port *info = tty->driver_data;
4131 struct cyclades_card *card;
4132 unsigned long flags;
4133 void __iomem *base_addr;
4134 int chip, channel, index;
4136 #ifdef CY_DEBUG_THROTTLE
4139 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4140 tty->ldisc.chars_in_buffer(tty), info->line);
4143 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
4149 if (!IS_CYC_Z(*card))
4150 cy_send_xchar(tty, STOP_CHAR(tty));
4155 if (tty->termios->c_cflag & CRTSCTS) {
4156 channel = info->line - card->first_line;
4157 if (!IS_CYC_Z(*card)) {
4158 chip = channel >> 2;
4160 index = card->bus_index;
4161 base_addr = card->base_addr +
4162 (cy_chip_offset[chip] << index);
4164 spin_lock_irqsave(&card->card_lock, flags);
4165 cy_writeb(base_addr + (CyCAR << index),
4167 if (info->rtsdtr_inv) {
4168 cy_writeb(base_addr + (CyMSVR2 << index),
4171 cy_writeb(base_addr + (CyMSVR1 << index),
4174 spin_unlock_irqrestore(&card->card_lock, flags);
4182 * This routine notifies the tty driver that it should signal
4183 * that characters can now be sent to the tty without fear of
4184 * overrunning the input buffers of the line disciplines.
4186 static void cy_unthrottle(struct tty_struct *tty)
4188 struct cyclades_port *info = tty->driver_data;
4189 struct cyclades_card *card;
4190 unsigned long flags;
4191 void __iomem *base_addr;
4192 int chip, channel, index;
4194 #ifdef CY_DEBUG_THROTTLE
4197 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4198 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
4201 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
4208 cy_send_xchar(tty, START_CHAR(tty));
4211 if (tty->termios->c_cflag & CRTSCTS) {
4213 channel = info->line - card->first_line;
4214 if (!IS_CYC_Z(*card)) {
4215 chip = channel >> 2;
4217 index = card->bus_index;
4218 base_addr = card->base_addr +
4219 (cy_chip_offset[chip] << index);
4221 spin_lock_irqsave(&card->card_lock, flags);
4222 cy_writeb(base_addr + (CyCAR << index),
4224 if (info->rtsdtr_inv) {
4225 cy_writeb(base_addr + (CyMSVR2 << index),
4228 cy_writeb(base_addr + (CyMSVR1 << index),
4231 spin_unlock_irqrestore(&card->card_lock, flags);
4236 } /* cy_unthrottle */
4238 /* cy_start and cy_stop provide software output flow control as a
4239 function of XON/XOFF, software CTS, and other such stuff.
4241 static void cy_stop(struct tty_struct *tty)
4243 struct cyclades_card *cinfo;
4244 struct cyclades_port *info = tty->driver_data;
4245 void __iomem *base_addr;
4246 int chip, channel, index;
4247 unsigned long flags;
4249 #ifdef CY_DEBUG_OTHER
4250 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4253 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4257 channel = info->line - cinfo->first_line;
4258 if (!IS_CYC_Z(*cinfo)) {
4259 index = cinfo->bus_index;
4260 chip = channel >> 2;
4262 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4264 spin_lock_irqsave(&cinfo->card_lock, flags);
4265 cy_writeb(base_addr + (CyCAR << index),
4266 (u_char)(channel & 0x0003)); /* index channel */
4267 cy_writeb(base_addr + (CySRER << index),
4268 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4269 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4273 static void cy_start(struct tty_struct *tty)
4275 struct cyclades_card *cinfo;
4276 struct cyclades_port *info = tty->driver_data;
4277 void __iomem *base_addr;
4278 int chip, channel, index;
4279 unsigned long flags;
4281 #ifdef CY_DEBUG_OTHER
4282 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4285 if (serial_paranoia_check(info, tty->name, "cy_start"))
4289 channel = info->line - cinfo->first_line;
4290 index = cinfo->bus_index;
4291 if (!IS_CYC_Z(*cinfo)) {
4292 chip = channel >> 2;
4294 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4296 spin_lock_irqsave(&cinfo->card_lock, flags);
4297 cy_writeb(base_addr + (CyCAR << index),
4298 (u_char) (channel & 0x0003)); /* index channel */
4299 cy_writeb(base_addr + (CySRER << index),
4300 readb(base_addr + (CySRER << index)) | CyTxRdy);
4301 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4306 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4308 static void cy_hangup(struct tty_struct *tty)
4310 struct cyclades_port *info = tty->driver_data;
4312 #ifdef CY_DEBUG_OTHER
4313 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4316 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4319 cy_flush_buffer(tty);
4321 info->port.count = 0;
4322 #ifdef CY_DEBUG_COUNT
4323 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4326 info->port.tty = NULL;
4327 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
4328 wake_up_interruptible(&info->port.open_wait);
4332 * ---------------------------------------------------------------------
4333 * cy_init() and friends
4335 * cy_init() is called at boot-time to initialize the serial driver.
4336 * ---------------------------------------------------------------------
4339 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4341 struct cyclades_port *info;
4342 u32 uninitialized_var(mailbox);
4343 unsigned int nports, port;
4344 unsigned short chip_number;
4345 int uninitialized_var(index);
4347 spin_lock_init(&cinfo->card_lock);
4349 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4350 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4351 cinfo->ctl_addr)->mail_box_0);
4352 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4353 cinfo->intr_enabled = 0;
4354 cinfo->nports = 0; /* Will be correctly set later, after
4357 index = cinfo->bus_index;
4358 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4361 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4362 if (cinfo->ports == NULL) {
4363 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4368 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4370 info = &cinfo->ports[port - cinfo->first_line];
4371 tty_port_init(&info->port);
4372 info->magic = CYCLADES_MAGIC;
4376 info->port.closing_wait = CLOSING_WAIT_DELAY;
4377 info->port.close_delay = 5 * HZ / 10;
4378 info->port.flags = STD_COM_FLAGS;
4379 init_completion(&info->shutdown_wait);
4380 init_waitqueue_head(&info->delta_msr_wait);
4382 if (IS_CYC_Z(*cinfo)) {
4383 info->type = PORT_STARTECH;
4384 if (mailbox == ZO_V1)
4385 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4387 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4388 #ifdef CONFIG_CYZ_INTR
4389 setup_timer(&cyz_rx_full_timer[port],
4390 cyz_rx_restart, (unsigned long)info);
4393 info->type = PORT_CIRRUS;
4394 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4395 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4397 info->cor3 = 0x08; /* _very_ small rcv threshold */
4399 chip_number = (port - cinfo->first_line) / 4;
4400 info->chip_rev = readb(cinfo->base_addr +
4401 (cy_chip_offset[chip_number] << index) +
4402 (CyGFRCR << index));
4404 if (info->chip_rev >= CD1400_REV_J) {
4405 /* It is a CD1400 rev. J or later */
4406 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4407 info->tco = baud_co_60[13]; /* Tx CO */
4408 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4409 info->rco = baud_co_60[13]; /* Rx CO */
4410 info->rtsdtr_inv = 1;
4412 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4413 info->tco = baud_co_25[13]; /* Tx CO */
4414 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4415 info->rco = baud_co_25[13]; /* Rx CO */
4416 info->rtsdtr_inv = 0;
4418 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4419 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4424 #ifndef CONFIG_CYZ_INTR
4425 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4426 mod_timer(&cyz_timerlist, jiffies + 1);
4428 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4435 /* initialize chips on Cyclom-Y card -- return number of valid
4436 chips (which is number of ports/4) */
4437 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4440 unsigned int chip_number;
4441 void __iomem *base_addr;
4443 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4444 /* Cy_HwReset is 0x1400 */
4445 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4446 /* Cy_ClrIntr is 0x1800 */
4449 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4452 true_base_addr + (cy_chip_offset[chip_number] << index);
4454 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4456 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4457 chip_number, (unsigned long)base_addr);
4462 cy_writeb(base_addr + (CyGFRCR << index), 0);
4465 /* The Cyclom-16Y does not decode address bit 9 and therefore
4466 cannot distinguish between references to chip 0 and a non-
4467 existent chip 4. If the preceding clearing of the supposed
4468 chip 4 GFRCR register appears at chip 0, there is no chip 4
4469 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4471 if (chip_number == 4 && readb(true_base_addr +
4472 (cy_chip_offset[0] << index) +
4473 (CyGFRCR << index)) == 0) {
4477 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4480 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4482 printk(" chip #%d at %#6lx is not responding ",
4483 chip_number, (unsigned long)base_addr);
4484 printk("(GFRCR stayed 0)\n",
4488 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4491 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4493 chip_number, (unsigned long)base_addr,
4494 base_addr[CyGFRCR<<index]);
4498 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4499 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4500 /* It is a CD1400 rev. J or later */
4501 /* Impossible to reach 5ms with this chip.
4502 Changed to 2ms instead (f = 500 Hz). */
4503 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4506 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4510 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4511 chip_number, (unsigned long)base_addr,
4512 readb(base_addr+(CyGFRCR<<index)));
4516 } /* cyy_init_card */
4519 * ---------------------------------------------------------------------
4520 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4521 * sets global variables and return the number of ISA boards found.
4522 * ---------------------------------------------------------------------
4524 static int __init cy_detect_isa(void)
4527 unsigned short cy_isa_irq, nboard;
4528 void __iomem *cy_isa_address;
4529 unsigned short i, j, cy_isa_nchan;
4537 /* Check for module parameters */
4538 for (i = 0; i < NR_CARDS; i++) {
4539 if (maddr[i] || i) {
4541 cy_isa_addresses[i] = maddr[i];
4548 /* scan the address table probing for Cyclom-Y/ISA boards */
4549 for (i = 0; i < NR_ISA_ADDRS; i++) {
4550 unsigned int isa_address = cy_isa_addresses[i];
4551 if (isa_address == 0x0000)
4554 /* probe for CD1400... */
4555 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
4556 if (cy_isa_address == NULL) {
4557 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4561 cy_isa_nchan = CyPORTS_PER_CHIP *
4562 cyy_init_card(cy_isa_address, 0);
4563 if (cy_isa_nchan == 0) {
4564 iounmap(cy_isa_address);
4568 if (isparam && irq[i])
4569 cy_isa_irq = irq[i];
4572 /* find out the board's irq by probing */
4573 cy_isa_irq = detect_isa_irq(cy_isa_address);
4574 if (cy_isa_irq == 0) {
4575 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4576 "IRQ could not be detected.\n",
4577 (unsigned long)cy_isa_address);
4578 iounmap(cy_isa_address);
4582 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4583 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4584 "more channels are available. Change NR_PORTS "
4585 "in cyclades.c and recompile kernel.\n",
4586 (unsigned long)cy_isa_address);
4587 iounmap(cy_isa_address);
4590 /* fill the next cy_card structure available */
4591 for (j = 0; j < NR_CARDS; j++) {
4592 if (cy_card[j].base_addr == NULL)
4595 if (j == NR_CARDS) { /* no more cy_cards available */
4596 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4597 "more cards can be used. Change NR_CARDS in "
4598 "cyclades.c and recompile kernel.\n",
4599 (unsigned long)cy_isa_address);
4600 iounmap(cy_isa_address);
4605 if (request_irq(cy_isa_irq, cyy_interrupt,
4606 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4607 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4608 "could not allocate IRQ#%d.\n",
4609 (unsigned long)cy_isa_address, cy_isa_irq);
4610 iounmap(cy_isa_address);
4615 cy_card[j].base_addr = cy_isa_address;
4616 cy_card[j].ctl_addr = NULL;
4617 cy_card[j].irq = (int)cy_isa_irq;
4618 cy_card[j].bus_index = 0;
4619 cy_card[j].first_line = cy_next_channel;
4620 cy_card[j].num_chips = cy_isa_nchan / 4;
4621 if (cy_init_card(&cy_card[j])) {
4622 cy_card[j].base_addr = NULL;
4623 free_irq(cy_isa_irq, &cy_card[j]);
4624 iounmap(cy_isa_address);
4629 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4630 "%d channels starting from port %d\n",
4631 j + 1, (unsigned long)cy_isa_address,
4632 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4633 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4635 for (j = cy_next_channel;
4636 j < cy_next_channel + cy_isa_nchan; j++)
4637 tty_register_device(cy_serial_driver, j, NULL);
4638 cy_next_channel += cy_isa_nchan;
4643 #endif /* CONFIG_ISA */
4644 } /* cy_detect_isa */
4647 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4651 for (a = 0; a < size && *str; a++, str++)
4655 for (; a < size; a++, str++)
4662 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
4665 for (; size > 0; size--) {
4666 cy_writel(fpga, *data++);
4671 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4672 struct RUNTIME_9060 __iomem *addr)
4675 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4677 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4679 /* Reload Config. Registers from EEPROM */
4680 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4682 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4684 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4685 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4686 * registers. This will remain here until we find a permanent fix.
4688 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4691 static int __devinit __cyz_load_fw(const struct firmware *fw,
4692 const char *name, const u32 mailbox, void __iomem *base,
4695 const void *ptr = fw->data;
4696 const struct zfile_header *h = ptr;
4697 const struct zfile_config *c, *cs;
4698 const struct zfile_block *b, *bs;
4699 unsigned int a, tmp, len = fw->size;
4700 #define BAD_FW KERN_ERR "Bad firmware: "
4701 if (len < sizeof(*h)) {
4702 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4706 cs = ptr + h->config_offset;
4707 bs = ptr + h->block_offset;
4709 if ((void *)(cs + h->n_config) > ptr + len ||
4710 (void *)(bs + h->n_blocks) > ptr + len) {
4711 printk(BAD_FW "too short");
4715 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4716 cyc_isfwstr(h->date, sizeof(h->date))) {
4717 printk(BAD_FW "bad formatted header string\n");
4721 if (strncmp(name, h->name, sizeof(h->name))) {
4722 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4727 for (c = cs; c < cs + h->n_config; c++) {
4728 for (a = 0; a < c->n_blocks; a++)
4729 if (c->block_list[a] > h->n_blocks) {
4730 printk(BAD_FW "bad block ref number in cfgs\n");
4733 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4737 printk(BAD_FW "nothing appropriate\n");
4741 for (b = bs; b < bs + h->n_blocks; b++)
4742 if (b->file_offset + b->size > len) {
4743 printk(BAD_FW "bad block data offset\n");
4747 /* everything is OK, let's seek'n'load it */
4748 for (c = cs; c < cs + h->n_config; c++)
4749 if (c->mailbox == mailbox && c->function == 0)
4752 for (a = 0; a < c->n_blocks; a++) {
4753 b = &bs[c->block_list[a]];
4754 if (b->type == ZBLOCK_FPGA) {
4756 cyz_fpga_copy(fpga, ptr + b->file_offset,
4760 memcpy_toio(base + b->ram_offset,
4761 ptr + b->file_offset, b->size);
4768 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4769 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4771 const struct firmware *fw;
4772 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4773 struct CUSTOM_REG __iomem *cust = base_addr;
4774 struct ZFW_CTRL __iomem *pt_zfwctrl;
4776 u32 mailbox, status;
4780 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4782 dev_err(&pdev->dev, "can't get firmware\n");
4786 /* Check whether the firmware is already loaded and running. If
4787 positive, skip this board */
4788 if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4789 u32 cntval = readl(base_addr + 0x190);
4792 if (cntval != readl(base_addr + 0x190)) {
4793 /* FW counter is working, FW is running */
4794 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4795 "Skipping board.\n");
4802 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4805 mailbox = readl(&ctl_addr->mail_box_0);
4807 if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4808 /* stops CPU and set window to beginning of RAM */
4809 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4810 cy_writel(&cust->cpu_stop, 0);
4811 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4815 plx_init(pdev, irq, ctl_addr);
4819 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4823 if (!Z_FPGA_LOADED(ctl_addr)) {
4824 dev_err(&pdev->dev, "fw upload successful, but fw is "
4830 /* stops CPU and set window to beginning of RAM */
4831 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4832 cy_writel(&cust->cpu_stop, 0);
4833 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4837 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4838 cy_writeb(tmp, 255);
4840 /* set window to last 512K of RAM */
4841 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4842 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4843 cy_writeb(tmp, 255);
4844 /* set window to beginning of RAM */
4845 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4848 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4849 release_firmware(fw);
4853 /* finish boot and start boards */
4854 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4855 cy_writel(&cust->cpu_start, 0);
4856 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4858 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4860 if (status != ZFIRM_ID) {
4861 if (status == ZFIRM_HLT) {
4862 dev_err(&pdev->dev, "you need an external power supply "
4863 "for this number of ports. Firmware halted and "
4868 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4869 "some more time\n", status);
4870 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4873 if (status != ZFIRM_ID) {
4874 dev_err(&pdev->dev, "Board not started in 20 seconds! "
4875 "Giving up. (fid->signature = 0x%x)\n",
4877 dev_info(&pdev->dev, "*** Warning ***: if you are "
4878 "upgrading the FW, please power cycle the "
4879 "system before loading the new FW to the "
4882 if (Z_FPGA_LOADED(ctl_addr))
4883 plx_init(pdev, irq, ctl_addr);
4888 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4891 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4893 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4894 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4895 base_addr + readl(&fid->zfwctrl_addr));
4897 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4898 readl(&pt_zfwctrl->board_ctrl.fw_version),
4899 readl(&pt_zfwctrl->board_ctrl.n_channel));
4901 if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
4902 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4903 "check the connection between the Z host card and the "
4904 "serial expanders.\n");
4906 if (Z_FPGA_LOADED(ctl_addr))
4907 plx_init(pdev, irq, ctl_addr);
4909 dev_info(&pdev->dev, "Null number of ports detected. Board "
4915 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4916 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4919 Early firmware failed to start looking for commands.
4920 This enables firmware interrupts for those commands.
4922 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4924 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4929 release_firmware(fw);
4934 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4935 const struct pci_device_id *ent)
4937 void __iomem *addr0 = NULL, *addr2 = NULL;
4938 char *card_name = NULL;
4940 unsigned int device_id, nchan = 0, card_no, i;
4941 unsigned char plx_ver;
4944 retval = pci_enable_device(pdev);
4946 dev_err(&pdev->dev, "cannot enable device\n");
4950 /* read PCI configuration area */
4952 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4954 #if defined(__alpha__)
4955 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4956 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4957 "addresses on Alpha systems.\n");
4962 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4963 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4969 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4970 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4972 pdev->resource[2].flags &= ~IORESOURCE_IO;
4975 retval = pci_request_regions(pdev, "cyclades");
4977 dev_err(&pdev->dev, "failed to reserve resources\n");
4982 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4983 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4984 card_name = "Cyclom-Y";
4986 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
4988 if (addr0 == NULL) {
4989 dev_err(&pdev->dev, "can't remap ctl region\n");
4992 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
4994 if (addr2 == NULL) {
4995 dev_err(&pdev->dev, "can't remap base region\n");
4999 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5001 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5002 "Serial-Modules\n");
5005 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5006 struct RUNTIME_9060 __iomem *ctl_addr;
5008 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
5010 if (addr0 == NULL) {
5011 dev_err(&pdev->dev, "can't remap ctl region\n");
5015 /* Disable interrupts on the PLX before resetting it */
5016 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
5018 plx_init(pdev, irq, addr0);
5020 mailbox = (u32)readl(&ctl_addr->mail_box_0);
5022 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
5023 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
5024 if (addr2 == NULL) {
5025 dev_err(&pdev->dev, "can't remap base region\n");
5029 if (mailbox == ZE_V1) {
5030 card_name = "Cyclades-Ze";
5032 readl(&ctl_addr->mail_box_0);
5033 nchan = ZE_V1_NPORTS;
5035 card_name = "Cyclades-8Zo";
5039 if (mailbox == ZO_V1) {
5040 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5041 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5042 "id %lx, ver %lx\n", (ulong)(0xff &
5043 readl(&((struct CUSTOM_REG *)addr2)->
5044 fpga_id)), (ulong)(0xff &
5045 readl(&((struct CUSTOM_REG *)addr2)->
5047 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5049 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5050 "Cyclades-Z board. FPGA not loaded\n");
5053 /* The following clears the firmware id word. This
5054 ensures that the driver will not attempt to talk to
5055 the board until it has been properly initialized.
5057 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5058 cy_writel(addr2 + ID_ADDRESS, 0L);
5061 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5066 if ((cy_next_channel + nchan) > NR_PORTS) {
5067 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5068 "channels are available. Change NR_PORTS in "
5069 "cyclades.c and recompile kernel.\n");
5072 /* fill the next cy_card structure available */
5073 for (card_no = 0; card_no < NR_CARDS; card_no++) {
5074 if (cy_card[card_no].base_addr == NULL)
5077 if (card_no == NR_CARDS) { /* no more cy_cards available */
5078 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5079 "more cards can be used. Change NR_CARDS in "
5080 "cyclades.c and recompile kernel.\n");
5084 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5085 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5087 retval = request_irq(irq, cyy_interrupt,
5088 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5090 dev_err(&pdev->dev, "could not allocate IRQ\n");
5093 cy_card[card_no].num_chips = nchan / 4;
5095 #ifdef CONFIG_CYZ_INTR
5096 /* allocate IRQ only if board has an IRQ */
5097 if (irq != 0 && irq != 255) {
5098 retval = request_irq(irq, cyz_interrupt,
5099 IRQF_SHARED, "Cyclades-Z",
5102 dev_err(&pdev->dev, "could not allocate IRQ\n");
5106 #endif /* CONFIG_CYZ_INTR */
5107 cy_card[card_no].num_chips = (unsigned int)-1;
5111 cy_card[card_no].base_addr = addr2;
5112 cy_card[card_no].ctl_addr = addr0;
5113 cy_card[card_no].irq = irq;
5114 cy_card[card_no].bus_index = 1;
5115 cy_card[card_no].first_line = cy_next_channel;
5116 retval = cy_init_card(&cy_card[card_no]);
5120 pci_set_drvdata(pdev, &cy_card[card_no]);
5122 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5123 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5124 /* enable interrupts in the PCI interface */
5125 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5129 cy_writeb(addr0 + 0x4c, 0x43);
5134 default: /* Old boards, use PLX_9060 */
5135 plx_init(pdev, irq, addr0);
5136 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
5141 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5142 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5143 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5144 tty_register_device(cy_serial_driver, i, &pdev->dev);
5145 cy_next_channel += nchan;
5149 cy_card[card_no].base_addr = NULL;
5150 free_irq(irq, &cy_card[card_no]);
5156 pci_release_regions(pdev);
5158 pci_disable_device(pdev);
5163 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5165 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5168 /* non-Z with old PLX */
5169 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5171 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5173 #ifndef CONFIG_CYZ_INTR
5174 if (!IS_CYC_Z(*cinfo))
5176 cy_writew(cinfo->ctl_addr + 0x68,
5177 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5179 iounmap(cinfo->base_addr);
5180 if (cinfo->ctl_addr)
5181 iounmap(cinfo->ctl_addr);
5183 #ifndef CONFIG_CYZ_INTR
5184 && !IS_CYC_Z(*cinfo)
5185 #endif /* CONFIG_CYZ_INTR */
5187 free_irq(cinfo->irq, cinfo);
5188 pci_release_regions(pdev);
5190 cinfo->base_addr = NULL;
5191 for (i = cinfo->first_line; i < cinfo->first_line +
5193 tty_unregister_device(cy_serial_driver, i);
5195 kfree(cinfo->ports);
5198 static struct pci_driver cy_pci_driver = {
5200 .id_table = cy_pci_dev_id,
5201 .probe = cy_pci_probe,
5202 .remove = __devexit_p(cy_pci_remove)
5206 static int cyclades_proc_show(struct seq_file *m, void *v)
5208 struct cyclades_port *info;
5210 __u32 cur_jifs = jiffies;
5212 seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
5213 "IdleIn Overruns Ldisc\n");
5215 /* Output one line for each known port */
5216 for (i = 0; i < NR_CARDS; i++)
5217 for (j = 0; j < cy_card[i].nports; j++) {
5218 info = &cy_card[i].ports[j];
5220 if (info->port.count)
5221 seq_printf(m, "%3d %8lu %10lu %8lu "
5222 "%10lu %8lu %9lu %6ld\n", info->line,
5223 (cur_jifs - info->idle_stats.in_use) /
5224 HZ, info->idle_stats.xmit_bytes,
5225 (cur_jifs - info->idle_stats.xmit_idle)/
5226 HZ, info->idle_stats.recv_bytes,
5227 (cur_jifs - info->idle_stats.recv_idle)/
5228 HZ, info->idle_stats.overruns,
5229 /* FIXME: double check locking */
5230 (long)info->port.tty->ldisc.ops->num);
5232 seq_printf(m, "%3d %8lu %10lu %8lu "
5233 "%10lu %8lu %9lu %6ld\n",
5234 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5239 static int cyclades_proc_open(struct inode *inode, struct file *file)
5241 return single_open(file, cyclades_proc_show, NULL);
5244 static const struct file_operations cyclades_proc_fops = {
5245 .owner = THIS_MODULE,
5246 .open = cyclades_proc_open,
5248 .llseek = seq_lseek,
5249 .release = single_release,
5252 /* The serial driver boot-time initialization code!
5253 Hardware I/O ports are mapped to character special devices on a
5254 first found, first allocated manner. That is, this code searches
5255 for Cyclom cards in the system. As each is found, it is probed
5256 to discover how many chips (and thus how many ports) are present.
5257 These ports are mapped to the tty ports 32 and upward in monotonic
5258 fashion. If an 8-port card is replaced with a 16-port card, the
5259 port mapping on a following card will shift.
5261 This approach is different from what is used in the other serial
5262 device driver because the Cyclom is more properly a multiplexer,
5263 not just an aggregation of serial ports on one card.
5265 If there are more cards with more ports than have been
5266 statically allocated above, a warning is printed and the
5267 extra ports are ignored.
5270 static const struct tty_operations cy_ops = {
5274 .put_char = cy_put_char,
5275 .flush_chars = cy_flush_chars,
5276 .write_room = cy_write_room,
5277 .chars_in_buffer = cy_chars_in_buffer,
5278 .flush_buffer = cy_flush_buffer,
5280 .throttle = cy_throttle,
5281 .unthrottle = cy_unthrottle,
5282 .set_termios = cy_set_termios,
5285 .hangup = cy_hangup,
5286 .break_ctl = cy_break,
5287 .wait_until_sent = cy_wait_until_sent,
5288 .tiocmget = cy_tiocmget,
5289 .tiocmset = cy_tiocmset,
5290 .proc_fops = &cyclades_proc_fops,
5293 static int __init cy_init(void)
5295 unsigned int nboards;
5296 int retval = -ENOMEM;
5298 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5299 if (!cy_serial_driver)
5302 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5303 __DATE__, __TIME__);
5305 /* Initialize the tty_driver structure */
5307 cy_serial_driver->owner = THIS_MODULE;
5308 cy_serial_driver->driver_name = "cyclades";
5309 cy_serial_driver->name = "ttyC";
5310 cy_serial_driver->major = CYCLADES_MAJOR;
5311 cy_serial_driver->minor_start = 0;
5312 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5313 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5314 cy_serial_driver->init_termios = tty_std_termios;
5315 cy_serial_driver->init_termios.c_cflag =
5316 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5317 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5318 tty_set_operations(cy_serial_driver, &cy_ops);
5320 retval = tty_register_driver(cy_serial_driver);
5322 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5326 /* the code below is responsible to find the boards. Each different
5327 type of board has its own detection routine. If a board is found,
5328 the next cy_card structure available is set by the detection
5329 routine. These functions are responsible for checking the
5330 availability of cy_card and cy_port data structures and updating
5331 the cy_next_channel. */
5333 /* look for isa boards */
5334 nboards = cy_detect_isa();
5337 /* look for pci boards */
5338 retval = pci_register_driver(&cy_pci_driver);
5339 if (retval && !nboards) {
5340 tty_unregister_driver(cy_serial_driver);
5347 put_tty_driver(cy_serial_driver);
5352 static void __exit cy_cleanup_module(void)
5354 struct cyclades_card *card;
5357 #ifndef CONFIG_CYZ_INTR
5358 del_timer_sync(&cyz_timerlist);
5359 #endif /* CONFIG_CYZ_INTR */
5361 e1 = tty_unregister_driver(cy_serial_driver);
5363 printk(KERN_ERR "failed to unregister Cyclades serial "
5364 "driver(%d)\n", e1);
5367 pci_unregister_driver(&cy_pci_driver);
5370 for (i = 0; i < NR_CARDS; i++) {
5372 if (card->base_addr) {
5373 /* clear interrupt */
5374 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5375 iounmap(card->base_addr);
5377 iounmap(card->ctl_addr);
5379 #ifndef CONFIG_CYZ_INTR
5381 #endif /* CONFIG_CYZ_INTR */
5383 free_irq(card->irq, card);
5384 for (e1 = card->first_line; e1 < card->first_line +
5386 tty_unregister_device(cy_serial_driver, e1);
5391 put_tty_driver(cy_serial_driver);
5392 } /* cy_cleanup_module */
5394 module_init(cy_init);
5395 module_exit(cy_cleanup_module);
5397 MODULE_LICENSE("GPL");
5398 MODULE_VERSION(CY_VERSION);
5399 MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);