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Char: cyclades, add firmware loading
[deliverable/linux.git] / drivers / char / cyclades.c
1 #undef BLOCKMOVE
2 #define Z_WAKE
3 #undef Z_EXT_CHARS_IN_BUFFER
4
5 /*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13 *
14 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
15 *
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.
21 *
22 * This version supports shared IRQ's (only for PCI boards).
23 *
24 * $Log: cyclades.c,v $
25 * Prevent users from opening non-existing Z ports.
26 *
27 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
28 * Fixed the PCI detection function to work properly on Alpha systems.
29 * Implemented support for TIOCSERGETLSR ioctl.
30 * Implemented full support for non-standard baud rates.
31 *
32 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
33 * Request PLX I/O region, although driver doesn't use it, to avoid
34 * problems with other drivers accessing it.
35 * Removed count for on-board buffer characters in cy_chars_in_buffer
36 * (Cyclades-Z only).
37 *
38 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
39 * Driver now reports physical instead of virtual memory addresses.
40 * Masks were added to some Cyclades-Z read accesses.
41 * Implemented workaround for PLX9050 bug that would cause a system lockup
42 * in certain systems, depending on the MMIO addresses allocated to the
43 * board.
44 * Changed the Tx interrupt programming in the CD1400 chips to boost up
45 * performance (Cyclom-Y only).
46 * Code is now compliant with the new module interface (module_[init|exit]).
47 * Make use of the PCI helper functions to access PCI resources.
48 * Did some code "housekeeping".
49 *
50 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
51 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
52 *
53 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
54 * Fixed SMP locking in Cyclom-Y interrupt handler.
55 *
56 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
57 * Added a new cyclades_card field called nports to allow the driver to
58 * know the exact number of ports found by the Z firmware after its load;
59 * RX buffer contention prevention logic on interrupt op mode revisited
60 * (Cyclades-Z only);
61 * Revisited printk's for Z debug;
62 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
63 *
64 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
65 * Fixed bug in cyz_poll that would make all ports but port 0
66 * unable to transmit/receive data (Cyclades-Z only);
67 * Implemented logic to prevent the RX buffer from being stuck with data
68 * due to a driver / firmware race condition in interrupt op mode
69 * (Cyclades-Z only);
70 * Fixed bug in block_til_ready logic that would lead to a system crash;
71 * Revisited cy_close spinlock usage;
72 *
73 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
74 * Revisited CONFIG_PCI conditional compilation for PCI board support;
75 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
76 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
77 * Removed CTS handling from the driver -- this is now completely handled
78 * by the firmware (Cyclades-Z only);
79 * Flush RX on-board buffers on a port open (Cyclades-Z only);
80 * Fixed handling of ASYNC_SPD_* TTY flags;
81 * Module unload now unmaps all memory area allocated by ioremap;
82 *
83 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
84 * Removed CY_PROC conditional compilation;
85 * Implemented SMP-awareness for the driver;
86 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
87 * functions;
88 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
89 * (irq=NN) as parameters (only for ISA boards);
90 * Fixed bug in set_line_char that would prevent the Cyclades-Z
91 * ports from being configured at speeds above 115.2Kbps;
92 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
93 * switching from working properly;
94 * The driver now only prints IRQ info for the Cyclades-Z if it's
95 * configured to work in interrupt mode;
96 *
97 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
98 * Added support for interrupt mode operation for the Z cards;
99 * Removed the driver inactivity control for the Z;
100 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
101 * the Z firmware is not loaded yet;
102 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
103 * same functionality;
104 * Implemented workaround for IRQ setting loss on the PCI configuration
105 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
106 *
107 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
108 * /proc entry location changed to /proc/tty/driver/cyclades;
109 * Added support to shared IRQ's (only for PCI boards);
110 * Added support for Cobalt Qube2 systems;
111 * IRQ [de]allocation scheme revisited;
112 * BREAK implementation changed in order to make use of the 'break_ctl'
113 * TTY facility;
114 * Fixed typo in TTY structure field 'driver_name';
115 * Included a PCI bridge reset and EEPROM reload in the board
116 * initialization code (for both Y and Z series).
117 *
118 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
119 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
120 * closed properly after a SIGINT;
121 * Module usage counter scheme revisited;
122 * Added support to the upcoming Y PCI boards (i.e., support to additional
123 * PCI Device ID's).
124 *
125 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
126 * Removed all unnecessary page-alignement operations in ioremap calls
127 * (ioremap is currently safe for these operations).
128 *
129 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
130 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
131 * order to make PLX9050-based boards work with certain motherboards.
132 *
133 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
134 * cy_close function now resets (correctly) the tty->closing flag;
135 * JIFFIES_DIFF macro fixed.
136 *
137 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
138 * Fixed bug in cy_close function, which was not informing HW of
139 * which port should have the reception disabled before doing so;
140 * fixed Cyclom-8YoP hardware detection bug.
141 *
142 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
143 * Fixed bug in cy_close function, which causes malfunction
144 * of one of the first 4 ports when a higher port is closed
145 * (Cyclom-Y only).
146 *
147 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
148 * Fixed Cyclom-4Yo hardware detection bug.
149 *
150 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
151 * /proc/cyclades implementation with great collaboration of
152 * Marc Lewis <marc@blarg.net>;
153 * cyy_interrupt was changed to avoid occurrence of kernel oopses
154 * during PPP operation.
155 *
156 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
157 * General code review in order to comply with 2.1 kernel standards;
158 * data loss prevention for slow devices revisited (cy_wait_until_sent
159 * was created);
160 * removed conditional compilation for new/old PCI structure support
161 * (now the driver only supports the new PCI structure).
162 *
163 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
164 * added conditional compilation for new/old PCI structure support;
165 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
166 *
167 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
168 * cleaned up the data loss fix;
169 * fixed XON/XOFF handling once more (Cyclades-Z);
170 * general review of the driver routines;
171 * introduction of a mechanism to prevent data loss with slow
172 * printers, by forcing a delay before closing the port.
173 *
174 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
175 * fixed detection/handling of new CD1400 in Ye boards;
176 * fixed XON/XOFF handling (Cyclades-Z);
177 * fixed data loss caused by a premature port close;
178 * introduction of a flag that holds the CD1400 version ID per port
179 * (used by the CYGETCD1400VER new ioctl).
180 *
181 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
182 * Code review for the module cleanup routine;
183 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
184 * includes anonymous changes regarding signal_pending.
185 *
186 * Revision 2.1 1997/11/01 17:42:41 ivan
187 * Changes in the driver to support Alpha systems (except 8Zo V_1);
188 * BREAK fix for the Cyclades-Z boards;
189 * driver inactivity control by FW implemented;
190 * introduction of flag that allows driver to take advantage of
191 * a special CD1400 feature related to HW flow control;
192 * added support for the CD1400 rev. J (Cyclom-Y boards);
193 * introduction of ioctls to:
194 * - control the rtsdtr_inv flag (Cyclom-Y);
195 * - control the rflow flag (Cyclom-Y);
196 * - adjust the polling interval (Cyclades-Z);
197 *
198 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
199 * Fixes related to kernel version conditional
200 * compilation.
201 *
202 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
203 * Compatibility issues between kernels 2.0.x and
204 * 2.1.x (mainly related to clear_bit function).
205 *
206 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
207 * Changes to define the memory window according to the
208 * board type.
209 *
210 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
211 * Changes to support new cycladesZ boards.
212 *
213 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
214 * Merge of Bentson's and Daniel's version 1.36.4.28.
215 * Corrects bug in cy_detect_pci: check if there are more
216 * ports than the number of static structs allocated.
217 * Warning message during initialization if this driver is
218 * used with the new generation of cycladesZ boards. Those
219 * will be supported only in next release of the driver.
220 * Corrects bug in cy_detect_pci and cy_detect_isa that
221 * returned wrong number of VALID boards, when a cyclomY
222 * was found with no serial modules connected.
223 * Changes to use current (2.1.x) kernel subroutine names
224 * and created macros for compilation with 2.0.x kernel,
225 * instead of the other way around.
226 *
227 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
228 * Change queue_task_irq_off to queue_task_irq.
229 * The inline function queue_task_irq_off (tqueue.h)
230 * was removed from latest releases of 2.1.x kernel.
231 * Use of macro __init to mark the initialization
232 * routines, so memory can be reused.
233 * Also incorporate implementation of critical region
234 * in function cleanup_module() created by anonymous
235 * linuxer.
236 *
237 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
238 * Change to support new firmware that solves DCD problem:
239 * application could fail to receive SIGHUP signal when DCD
240 * varying too fast.
241 *
242 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
243 * Changed for support linux versions 2.1.X.
244 * Backward compatible with linux versions 2.0.X.
245 * Corrected illegal use of filler field in
246 * CH_CTRL struct.
247 * Deleted some debug messages.
248 *
249 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
250 * Included check for NULL tty pointer in cyz_poll.
251 *
252 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
253 * Bill Foster at Blarg! Online services noticed that
254 * some of the switch elements of -Z modem control
255 * lacked a closing "break;"
256 *
257 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
258 * Changed low water threshold for buffer xmit_buf
259 *
260 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
261 * Marcio provided fix to modem status fetch for -Z
262 *
263 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
264 * improve mapping of -Z control page (thanks to Steve
265 * Price <stevep@fa.tdktca.com> for help on this)
266 *
267 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
268 * shift from CPU-bound to memcopy in cyz_polling operation
269 *
270 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
271 * Added support to set and report higher speeds.
272 *
273 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
274 * Some fixes in the HW flow control for the BETA release.
275 * Don't try to register the IRQ.
276 *
277 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
278 * make sure "cyc" appears in all kernel messages; all soft interrupts
279 * handled by same routine; recognize out-of-band reception; comment
280 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
281 * fix race condition in -Z buffer management; only -Y needs to explicitly
282 * flush chars; tidy up some startup messages;
283 *
284 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
285 * shift MOD_INC_USE_COUNT location to match
286 * serial.c; purge some diagnostic messages;
287 *
288 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
289 * enable modem status messages and fetch & process them; note
290 * time of last activity type for each port; set_line_char now
291 * supports more than line 0 and treats 0 baud correctly;
292 * get_modem_info senses rs_status;
293 *
294 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
295 * barely works--now's time to turn on
296 * more features 'til it breaks
297 *
298 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
299 * check more -Z board status; shorten boot message
300 *
301 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
302 * fix reference to ch_ctrl in startup; verify return
303 * values from cyz_issue_cmd and cyz_update_channel;
304 * more stuff to get modem control correct;
305 *
306 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
307 * more -Z stuff folded in; re-order changes to put -Z stuff
308 * after -Y stuff (to make changes clearer)
309 *
310 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
311 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
312 * Add code to send break. Clear firmware ID word at startup (so
313 * that other code won't talk to inactive board).
314 *
315 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
316 * add code for -Z in set_line_char
317 *
318 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
319 * fold more -Z stuff (or in some cases, error messages)
320 * into driver; add text to "don't know what to do" messages.
321 *
322 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
323 * moved compile-time flags near top of file; cosmetic changes
324 * to narrow text (to allow 2-up printing); changed many declarations
325 * to "static" to limit external symbols; shuffled code order to
326 * coalesce -Y and -Z specific code, also to put internal functions
327 * in order of tty_driver structure; added code to recognize -Z
328 * ports (and for moment, do nothing or report error); add cy_startup
329 * to parse boot command line for extra base addresses for ISA probes;
330 *
331 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
332 * reorder some code, fix types of some vars (int vs. long),
333 * add cy_setup to support user declared ISA addresses
334 *
335 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
336 * dump ioctl based firmware load (it's now a user level
337 * program); ensure uninitialzed ports cannot be used
338 *
339 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
340 * rename vars and restructure some code
341 *
342 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
343 * get right status back after boot load
344 *
345 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
346 * successfully loads firmware
347 *
348 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
349 * add more of the code for the boot/load ioctls
350 *
351 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
352 * start to add Z functionality--starting with ioctl
353 * for loading firmware
354 *
355 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
356 * added code to recognize Z/PCI card at initialization; report
357 * presence, but card is not initialized (because firmware needs
358 * to be loaded)
359 *
360 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
361 * starting minor number at zero; added missing verify_area
362 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
363 *
364 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
365 * remove unneeded boot message & fix CLOCAL hardware flow
366 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
367 * remove unused diagnostic statements; minor 0 is first;
368 *
369 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
370 * The kernel function vremap (available only in later 1.3.xx kernels)
371 * allows the access to memory addresses above the RAM. This revision
372 * of the driver supports PCI boards below 1Mb (device id 0x100) and
373 * above 1Mb (device id 0x101).
374 *
375 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
376 * Some global changes to interrupt handling spilled into
377 * this driver--mostly unused arguments in system function
378 * calls. Also added change by Marcio Saito which should
379 * reduce lost interrupts at startup by fast processors.
380 *
381 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
382 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
383 * in 1.3.41 kernel to remove a possible race condition, extend
384 * some error messages, and let the driver run as a loadable module
385 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
386 * possible race condition.
387 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
388 *
389 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
390 * Changes by Linus Torvalds in 1.3.33 kernel distribution
391 * required due to reordering of driver initialization.
392 * Drivers are now initialized *after* memory management.
393 *
394 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
395 * remove printk from ISR; fix typo
396 *
397 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
398 * Minor fixes in the PCI board support. PCI function calls in
399 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
400 * <duncan@okay.com>. "bad serial count" message removed.
401 *
402 * Revision 1.36.3 1995/08/22 09:19:42 marcio
403 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
404 * board initialization. Changes in the boot messages. The driver
405 * supports up to 4 boards and 64 ports by default.
406 *
407 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
408 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
409 *
410 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
411 * add missing break in modem control block in ioctl switch statement
412 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
413 *
414 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
415 * make sure CTS flow control is set as soon as possible (thanks
416 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
417 *
418 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
419 * initialize defaults for receive threshold and stale data timeout;
420 * cosmetic changes;
421 *
422 * Revision 1.36 1995/03/10 23:33:53 bentson
423 * added support of chips 4-7 in 32 port Cyclom-Ye;
424 * fix cy_interrupt pointer dereference problem
425 * (Joe Portman <baron@aa.net>);
426 * give better error response if open is attempted on non-existent port
427 * (Zachariah Vaum <jchryslr@netcom.com>);
428 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
429 * conditional compilation for -16Y on systems with fast, noisy bus;
430 * comment out diagnostic print function;
431 * cleaned up table of base addresses;
432 * set receiver time-out period register to correct value,
433 * set receive threshold to better default values,
434 * set chip timer to more accurate 200 Hz ticking,
435 * add code to monitor and modify receive parameters
436 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
437 * <njs@scifi.emi.net>);
438 *
439 * Revision 1.35 1994/12/16 13:54:18 steffen
440 * additional patch by Marcio Saito for board detection
441 * Accidently left out in 1.34
442 *
443 * Revision 1.34 1994/12/10 12:37:12 steffen
444 * This is the corrected version as suggested by Marcio Saito
445 *
446 * Revision 1.33 1994/12/01 22:41:18 bentson
447 * add hooks to support more high speeds directly; add tytso
448 * patch regarding CLOCAL wakeups
449 *
450 * Revision 1.32 1994/11/23 19:50:04 bentson
451 * allow direct kernel control of higher signalling rates;
452 * look for cards at additional locations
453 *
454 * Revision 1.31 1994/11/16 04:33:28 bentson
455 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
456 * a problem in chars_in_buffer has been resolved by some
457 * small changes; this should yield smoother output
458 *
459 * Revision 1.30 1994/11/16 04:28:05 bentson
460 * Fix from Corey Minyard, Internet: minyard@metronet.com,
461 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
462 * cy_hangup that appears to clear up much (all?) of the
463 * DTR glitches; also he's added/cleaned-up diagnostic messages
464 *
465 * Revision 1.29 1994/11/16 04:16:07 bentson
466 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
467 * operate higher speeds in same way as other serial ports;
468 * add more serial ports (for up to two 16-port muxes).
469 *
470 * Revision 1.28 1994/11/04 00:13:16 root
471 * turn off diagnostic messages
472 *
473 * Revision 1.27 1994/11/03 23:46:37 root
474 * bunch of changes to bring driver into greater conformance
475 * with the serial.c driver (looking for missed fixes)
476 *
477 * Revision 1.26 1994/11/03 22:40:36 root
478 * automatic interrupt probing fixed.
479 *
480 * Revision 1.25 1994/11/03 20:17:02 root
481 * start to implement auto-irq
482 *
483 * Revision 1.24 1994/11/03 18:01:55 root
484 * still working on modem signals--trying not to drop DTR
485 * during the getty/login processes
486 *
487 * Revision 1.23 1994/11/03 17:51:36 root
488 * extend baud rate support; set receive threshold as function
489 * of baud rate; fix some problems with RTS/CTS;
490 *
491 * Revision 1.22 1994/11/02 18:05:35 root
492 * changed arguments to udelay to type long to get
493 * delays to be of correct duration
494 *
495 * Revision 1.21 1994/11/02 17:37:30 root
496 * employ udelay (after calibrating loops_per_second earlier
497 * in init/main.c) instead of using home-grown delay routines
498 *
499 * Revision 1.20 1994/11/02 03:11:38 root
500 * cy_chars_in_buffer forces a return value of 0 to let
501 * login work (don't know why it does); some functions
502 * that were returning EFAULT, now executes the code;
503 * more work on deciding when to disable xmit interrupts;
504 *
505 * Revision 1.19 1994/11/01 20:10:14 root
506 * define routine to start transmission interrupts (by enabling
507 * transmit interrupts); directly enable/disable modem interrupts;
508 *
509 * Revision 1.18 1994/11/01 18:40:45 bentson
510 * Don't always enable transmit interrupts in startup; interrupt on
511 * TxMpty instead of TxRdy to help characters get out before shutdown;
512 * restructure xmit interrupt to check for chars first and quit if
513 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
514 * (to my view);
515 *
516 * Revision 1.17 1994/10/30 04:39:45 bentson
517 * rename serial_driver and callout_driver to cy_serial_driver and
518 * cy_callout_driver to avoid linkage interference; initialize
519 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
520 * from cyclades_port structure; add paranoia check to cy_close;
521 *
522 * Revision 1.16 1994/10/30 01:14:33 bentson
523 * change major numbers; add some _early_ return statements;
524 *
525 * Revision 1.15 1994/10/29 06:43:15 bentson
526 * final tidying up for clean compile; enable some error reporting
527 *
528 * Revision 1.14 1994/10/28 20:30:22 Bentson
529 * lots of changes to drag the driver towards the new tty_io
530 * structures and operation. not expected to work, but may
531 * compile cleanly.
532 *
533 * Revision 1.13 1994/07/21 23:08:57 Bentson
534 * add some diagnostic cruft; support 24 lines (for testing
535 * both -8Y and -16Y cards; be more thorough in servicing all
536 * chips during interrupt; add "volatile" a few places to
537 * circumvent compiler optimizations; fix base & offset
538 * computations in block_til_ready (was causing chip 0 to
539 * stop operation)
540 *
541 * Revision 1.12 1994/07/19 16:42:11 Bentson
542 * add some hackery for kernel version 1.1.8; expand
543 * error messages; refine timing for delay loops and
544 * declare loop params volatile
545 *
546 * Revision 1.11 1994/06/11 21:53:10 bentson
547 * get use of save_car right in transmit interrupt service
548 *
549 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
550 * add some diagnostic printing; try to fix save_car stuff
551 *
552 * Revision 1.10 1994/06/11 20:36:08 bentson
553 * clean up compiler warnings
554 *
555 * Revision 1.9 1994/06/11 19:42:46 bentson
556 * added a bunch of code to support modem signalling
557 *
558 * Revision 1.8 1994/06/11 17:57:07 bentson
559 * recognize break & parity error
560 *
561 * Revision 1.7 1994/06/05 05:51:34 bentson
562 * Reorder baud table to be monotonic; add cli to CP; discard
563 * incoming characters and status if the line isn't open; start to
564 * fold code into cy_throttle; start to port get_serial_info,
565 * set_serial_info, get_modem_info, set_modem_info, and send_break
566 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
567 * get flow control characters from tty struct; invalidate ports w/o
568 * hardware;
569 *
570 * Revision 1.6 1994/05/31 18:42:21 bentson
571 * add a loop-breaker in the interrupt service routine;
572 * note when port is initialized so that it can be shut
573 * down under the right conditions; receive works without
574 * any obvious errors
575 *
576 * Revision 1.5 1994/05/30 00:55:02 bentson
577 * transmit works without obvious errors
578 *
579 * Revision 1.4 1994/05/27 18:46:27 bentson
580 * incorporated more code from lib_y.c; can now print short
581 * strings under interrupt control to port zero; seems to
582 * select ports/channels/lines correctly
583 *
584 * Revision 1.3 1994/05/25 22:12:44 bentson
585 * shifting from multi-port on a card to proper multiplexor
586 * data structures; added skeletons of most routines
587 *
588 * Revision 1.2 1994/05/19 13:21:43 bentson
589 * start to crib from other sources
590 *
591 */
592
593 #define CY_VERSION "2.5"
594
595 /* If you need to install more boards than NR_CARDS, change the constant
596 in the definition below. No other change is necessary to support up to
597 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
598
599 #define NR_CARDS 4
600
601 /*
602 If the total number of ports is larger than NR_PORTS, change this
603 constant in the definition below. No other change is necessary to
604 support more boards/ports. */
605
606 #define NR_PORTS 256
607
608 #define ZE_V1_NPORTS 64
609 #define ZO_V1 0
610 #define ZO_V2 1
611 #define ZE_V1 2
612
613 #define SERIAL_PARANOIA_CHECK
614 #undef CY_DEBUG_OPEN
615 #undef CY_DEBUG_THROTTLE
616 #undef CY_DEBUG_OTHER
617 #undef CY_DEBUG_IO
618 #undef CY_DEBUG_COUNT
619 #undef CY_DEBUG_DTR
620 #undef CY_DEBUG_WAIT_UNTIL_SENT
621 #undef CY_DEBUG_INTERRUPTS
622 #undef CY_16Y_HACK
623 #undef CY_ENABLE_MONITORING
624 #undef CY_PCI_DEBUG
625
626 /*
627 * Include section
628 */
629 #include <linux/module.h>
630 #include <linux/errno.h>
631 #include <linux/signal.h>
632 #include <linux/sched.h>
633 #include <linux/timer.h>
634 #include <linux/interrupt.h>
635 #include <linux/tty.h>
636 #include <linux/tty_flip.h>
637 #include <linux/serial.h>
638 #include <linux/major.h>
639 #include <linux/string.h>
640 #include <linux/fcntl.h>
641 #include <linux/ptrace.h>
642 #include <linux/cyclades.h>
643 #include <linux/mm.h>
644 #include <linux/ioport.h>
645 #include <linux/init.h>
646 #include <linux/delay.h>
647 #include <linux/spinlock.h>
648 #include <linux/bitops.h>
649 #include <linux/firmware.h>
650
651 #include <asm/system.h>
652 #include <asm/io.h>
653 #include <asm/irq.h>
654 #include <asm/uaccess.h>
655
656 #include <linux/kernel.h>
657 #include <linux/pci.h>
658
659 #include <linux/stat.h>
660 #include <linux/proc_fs.h>
661
662 static void cy_throttle(struct tty_struct *tty);
663 static void cy_send_xchar(struct tty_struct *tty, char ch);
664
665 #define IS_CYC_Z(card) ((card).num_chips == -1)
666
667 #define Z_FPGA_CHECK(card) \
668 ((readl(&((struct RUNTIME_9060 __iomem *) \
669 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
670
671 #define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
672 ((card).ctl_addr))->mail_box_0)) || \
673 Z_FPGA_CHECK(card)) && \
674 (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
675 ((card).base_addr+ID_ADDRESS))->signature)))
676
677 #ifndef SERIAL_XMIT_SIZE
678 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
679 #endif
680 #define WAKEUP_CHARS 256
681
682 #define STD_COM_FLAGS (0)
683
684 /* firmware stuff */
685 #define ZL_MAX_BLOCKS 16
686 #define DRIVER_VERSION 0x02010203
687 #define RAM_SIZE 0x80000
688
689 #define Z_FPGA_LOADED(X) ((readl(&(X)->init_ctrl) & (1<<17)) != 0)
690
691 enum zblock_type {
692 ZBLOCK_PRG = 0,
693 ZBLOCK_FPGA = 1
694 };
695
696 struct zfile_header {
697 char name[64];
698 char date[32];
699 char aux[32];
700 u32 n_config;
701 u32 config_offset;
702 u32 n_blocks;
703 u32 block_offset;
704 u32 reserved[9];
705 } __attribute__ ((packed));
706
707 struct zfile_config {
708 char name[64];
709 u32 mailbox;
710 u32 function;
711 u32 n_blocks;
712 u32 block_list[ZL_MAX_BLOCKS];
713 } __attribute__ ((packed));
714
715 struct zfile_block {
716 u32 type;
717 u32 file_offset;
718 u32 ram_offset;
719 u32 size;
720 } __attribute__ ((packed));
721
722 static struct tty_driver *cy_serial_driver;
723
724 #ifdef CONFIG_ISA
725 /* This is the address lookup table. The driver will probe for
726 Cyclom-Y/ISA boards at all addresses in here. If you want the
727 driver to probe addresses at a different address, add it to
728 this table. If the driver is probing some other board and
729 causing problems, remove the offending address from this table.
730 The cy_setup function extracts additional addresses from the
731 boot options line. The form is "cyclades=address,address..."
732 */
733
734 static unsigned int cy_isa_addresses[] = {
735 0xD0000,
736 0xD2000,
737 0xD4000,
738 0xD6000,
739 0xD8000,
740 0xDA000,
741 0xDC000,
742 0xDE000,
743 0, 0, 0, 0, 0, 0, 0, 0
744 };
745
746 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
747
748 #ifdef MODULE
749 static long maddr[NR_CARDS];
750 static int irq[NR_CARDS];
751
752 module_param_array(maddr, long, NULL, 0);
753 module_param_array(irq, int, NULL, 0);
754 #endif
755
756 #endif /* CONFIG_ISA */
757
758 /* This is the per-card data structure containing address, irq, number of
759 channels, etc. This driver supports a maximum of NR_CARDS cards.
760 */
761 static struct cyclades_card cy_card[NR_CARDS];
762
763 static int cy_next_channel; /* next minor available */
764
765 /*
766 * This is used to look up the divisor speeds and the timeouts
767 * We're normally limited to 15 distinct baud rates. The extra
768 * are accessed via settings in info->flags.
769 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
770 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
771 * HI VHI
772 * 20
773 */
774 static int baud_table[] = {
775 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
776 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
777 230400, 0
778 };
779
780 static char baud_co_25[] = { /* 25 MHz clock option table */
781 /* value => 00 01 02 03 04 */
782 /* divide by 8 32 128 512 2048 */
783 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
784 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
785 };
786
787 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
788 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
789 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
790 };
791
792 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
793 /* value => 00 01 02 03 04 */
794 /* divide by 8 32 128 512 2048 */
795 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
796 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
797 0x00
798 };
799
800 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
801 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
802 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
803 0x21
804 };
805
806 static char baud_cor3[] = { /* receive threshold */
807 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
808 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
809 0x07
810 };
811
812 /*
813 * The Cyclades driver implements HW flow control as any serial driver.
814 * The cyclades_port structure member rflow and the vector rflow_thr
815 * allows us to take advantage of a special feature in the CD1400 to avoid
816 * data loss even when the system interrupt latency is too high. These flags
817 * are to be used only with very special applications. Setting these flags
818 * requires the use of a special cable (DTR and RTS reversed). In the new
819 * CD1400-based boards (rev. 6.00 or later), there is no need for special
820 * cables.
821 */
822
823 static char rflow_thr[] = { /* rflow threshold */
824 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
825 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
826 0x0a
827 };
828
829 /* The Cyclom-Ye has placed the sequential chips in non-sequential
830 * address order. This look-up table overcomes that problem.
831 */
832 static int cy_chip_offset[] = { 0x0000,
833 0x0400,
834 0x0800,
835 0x0C00,
836 0x0200,
837 0x0600,
838 0x0A00,
839 0x0E00
840 };
841
842 /* PCI related definitions */
843
844 #ifdef CONFIG_PCI
845 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
846 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
847 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
848 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
849 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
850 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
851 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
852 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
853 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
854 { } /* end of table */
855 };
856 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
857 #endif
858
859 static void cy_start(struct tty_struct *);
860 static void set_line_char(struct cyclades_port *);
861 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
862 #ifdef CONFIG_ISA
863 static unsigned detect_isa_irq(void __iomem *);
864 #endif /* CONFIG_ISA */
865
866 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
867
868 #ifndef CONFIG_CYZ_INTR
869 static void cyz_poll(unsigned long);
870
871 /* The Cyclades-Z polling cycle is defined by this variable */
872 static long cyz_polling_cycle = CZ_DEF_POLL;
873
874 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
875
876 #else /* CONFIG_CYZ_INTR */
877 static void cyz_rx_restart(unsigned long);
878 static struct timer_list cyz_rx_full_timer[NR_PORTS];
879 #endif /* CONFIG_CYZ_INTR */
880
881 static inline int serial_paranoia_check(struct cyclades_port *info,
882 char *name, const char *routine)
883 {
884 #ifdef SERIAL_PARANOIA_CHECK
885 if (!info) {
886 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
887 "in %s\n", name, routine);
888 return 1;
889 }
890
891 if (info->magic != CYCLADES_MAGIC) {
892 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
893 "struct (%s) in %s\n", name, routine);
894 return 1;
895 }
896 #endif
897 return 0;
898 } /* serial_paranoia_check */
899
900 /*
901 * This routine is used by the interrupt handler to schedule
902 * processing in the software interrupt portion of the driver
903 * (also known as the "bottom half"). This can be called any
904 * number of times for any channel without harm.
905 */
906 static inline void cy_sched_event(struct cyclades_port *info, int event)
907 {
908 info->event |= 1 << event; /* remember what kind of event and who */
909 schedule_work(&info->tqueue);
910 } /* cy_sched_event */
911
912 /*
913 * This routine is used to handle the "bottom half" processing for the
914 * serial driver, known also the "software interrupt" processing.
915 * This processing is done at the kernel interrupt level, after the
916 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
917 * is where time-consuming activities which can not be done in the
918 * interrupt driver proper are done; the interrupt driver schedules
919 * them using cy_sched_event(), and they get done here.
920 *
921 * This is done through one level of indirection--the task queue.
922 * When a hardware interrupt service routine wants service by the
923 * driver's bottom half, it enqueues the appropriate tq_struct (one
924 * per port) to the keventd work queue and sets a request flag
925 * that the work queue be processed.
926 *
927 * Although this may seem unwieldy, it gives the system a way to
928 * pass an argument (in this case the pointer to the cyclades_port
929 * structure) to the bottom half of the driver. Previous kernels
930 * had to poll every port to see if that port needed servicing.
931 */
932 static void
933 do_softint(struct work_struct *work)
934 {
935 struct cyclades_port *info =
936 container_of(work, struct cyclades_port, tqueue);
937 struct tty_struct *tty;
938
939 tty = info->tty;
940 if (!tty)
941 return;
942
943 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
944 tty_hangup(info->tty);
945 wake_up_interruptible(&info->open_wait);
946 info->flags &= ~ASYNC_NORMAL_ACTIVE;
947 }
948 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
949 wake_up_interruptible(&info->open_wait);
950 #ifdef CONFIG_CYZ_INTR
951 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event) &&
952 !timer_pending(&cyz_rx_full_timer[info->line]))
953 mod_timer(&cyz_rx_full_timer[info->line], jiffies + 1);
954 #endif
955 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
956 wake_up_interruptible(&info->delta_msr_wait);
957 tty_wakeup(tty);
958 #ifdef Z_WAKE
959 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
960 complete(&info->shutdown_wait);
961 #endif
962 } /* do_softint */
963
964
965 /***********************************************************/
966 /********* Start of block of Cyclom-Y specific code ********/
967
968 /* This routine waits up to 1000 micro-seconds for the previous
969 command to the Cirrus chip to complete and then issues the
970 new command. An error is returned if the previous command
971 didn't finish within the time limit.
972
973 This function is only called from inside spinlock-protected code.
974 */
975 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
976 {
977 unsigned int i;
978
979 /* Check to see that the previous command has completed */
980 for (i = 0; i < 100; i++) {
981 if (readb(base_addr + (CyCCR << index)) == 0) {
982 break;
983 }
984 udelay(10L);
985 }
986 /* if the CCR never cleared, the previous command
987 didn't finish within the "reasonable time" */
988 if (i == 100)
989 return -1;
990
991 /* Issue the new command */
992 cy_writeb(base_addr + (CyCCR << index), cmd);
993
994 return 0;
995 } /* cyy_issue_cmd */
996
997 #ifdef CONFIG_ISA
998 /* ISA interrupt detection code */
999 static unsigned detect_isa_irq(void __iomem * address)
1000 {
1001 int irq;
1002 unsigned long irqs, flags;
1003 int save_xir, save_car;
1004 int index = 0; /* IRQ probing is only for ISA */
1005
1006 /* forget possible initially masked and pending IRQ */
1007 irq = probe_irq_off(probe_irq_on());
1008
1009 /* Clear interrupts on the board first */
1010 cy_writeb(address + (Cy_ClrIntr << index), 0);
1011 /* Cy_ClrIntr is 0x1800 */
1012
1013 irqs = probe_irq_on();
1014 /* Wait ... */
1015 udelay(5000L);
1016
1017 /* Enable the Tx interrupts on the CD1400 */
1018 local_irq_save(flags);
1019 cy_writeb(address + (CyCAR << index), 0);
1020 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1021
1022 cy_writeb(address + (CyCAR << index), 0);
1023 cy_writeb(address + (CySRER << index),
1024 readb(address + (CySRER << index)) | CyTxRdy);
1025 local_irq_restore(flags);
1026
1027 /* Wait ... */
1028 udelay(5000L);
1029
1030 /* Check which interrupt is in use */
1031 irq = probe_irq_off(irqs);
1032
1033 /* Clean up */
1034 save_xir = (u_char) readb(address + (CyTIR << index));
1035 save_car = readb(address + (CyCAR << index));
1036 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1037 cy_writeb(address + (CySRER << index),
1038 readb(address + (CySRER << index)) & ~CyTxRdy);
1039 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1040 cy_writeb(address + (CyCAR << index), (save_car));
1041 cy_writeb(address + (Cy_ClrIntr << index), 0);
1042 /* Cy_ClrIntr is 0x1800 */
1043
1044 return (irq > 0) ? irq : 0;
1045 }
1046 #endif /* CONFIG_ISA */
1047
1048 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1049 void __iomem * base_addr, int status, int index)
1050 {
1051 struct cyclades_port *info;
1052 struct tty_struct *tty;
1053 int char_count;
1054 int j, len, mdm_change, mdm_status, outch;
1055 int save_xir, channel, save_car;
1056 char data;
1057
1058 if (status & CySRReceive) { /* reception interrupt */
1059 #ifdef CY_DEBUG_INTERRUPTS
1060 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
1061 #endif
1062 /* determine the channel & change to that context */
1063 spin_lock(&cinfo->card_lock);
1064 save_xir = (u_char) readb(base_addr + (CyRIR << index));
1065 channel = (u_short) (save_xir & CyIRChannel);
1066 info = &cinfo->ports[channel + chip * 4];
1067 save_car = readb(base_addr + (CyCAR << index));
1068 cy_writeb(base_addr + (CyCAR << index), save_xir);
1069
1070 /* if there is nowhere to put the data, discard it */
1071 if (info->tty == NULL) {
1072 j = (readb(base_addr + (CyRIVR << index)) &
1073 CyIVRMask);
1074 if (j == CyIVRRxEx) { /* exception */
1075 data = readb(base_addr + (CyRDSR << index));
1076 } else { /* normal character reception */
1077 char_count = readb(base_addr +
1078 (CyRDCR << index));
1079 while (char_count--) {
1080 data = readb(base_addr +
1081 (CyRDSR << index));
1082 }
1083 }
1084 } else { /* there is an open port for this data */
1085 tty = info->tty;
1086 j = (readb(base_addr + (CyRIVR << index)) &
1087 CyIVRMask);
1088 if (j == CyIVRRxEx) { /* exception */
1089 data = readb(base_addr + (CyRDSR << index));
1090
1091 /* For statistics only */
1092 if (data & CyBREAK)
1093 info->icount.brk++;
1094 else if (data & CyFRAME)
1095 info->icount.frame++;
1096 else if (data & CyPARITY)
1097 info->icount.parity++;
1098 else if (data & CyOVERRUN)
1099 info->icount.overrun++;
1100
1101 if (data & info->ignore_status_mask) {
1102 info->icount.rx++;
1103 spin_unlock(&cinfo->card_lock);
1104 return;
1105 }
1106 if (tty_buffer_request_room(tty, 1)) {
1107 if (data & info->read_status_mask) {
1108 if (data & CyBREAK) {
1109 tty_insert_flip_char(
1110 tty,
1111 readb(
1112 base_addr +
1113 (CyRDSR <<
1114 index)),
1115 TTY_BREAK);
1116 info->icount.rx++;
1117 if (info->flags &
1118 ASYNC_SAK) {
1119 do_SAK(tty);
1120 }
1121 } else if (data & CyFRAME) {
1122 tty_insert_flip_char(
1123 tty,
1124 readb(
1125 base_addr +
1126 (CyRDSR <<
1127 index)),
1128 TTY_FRAME);
1129 info->icount.rx++;
1130 info->idle_stats.
1131 frame_errs++;
1132 } else if (data & CyPARITY) {
1133 /* Pieces of seven... */
1134 tty_insert_flip_char(
1135 tty,
1136 readb(
1137 base_addr +
1138 (CyRDSR <<
1139 index)),
1140 TTY_PARITY);
1141 info->icount.rx++;
1142 info->idle_stats.
1143 parity_errs++;
1144 } else if (data & CyOVERRUN) {
1145 tty_insert_flip_char(
1146 tty, 0,
1147 TTY_OVERRUN);
1148 info->icount.rx++;
1149 /* If the flip buffer itself is
1150 overflowing, we still lose
1151 the next incoming character.
1152 */
1153 tty_insert_flip_char(
1154 tty,
1155 readb(
1156 base_addr +
1157 (CyRDSR <<
1158 index)),
1159 TTY_FRAME);
1160 info->icount.rx++;
1161 info->idle_stats.
1162 overruns++;
1163 /* These two conditions may imply */
1164 /* a normal read should be done. */
1165 /* }else if(data & CyTIMEOUT){ */
1166 /* }else if(data & CySPECHAR){ */
1167 } else {
1168 tty_insert_flip_char(
1169 tty, 0,
1170 TTY_NORMAL);
1171 info->icount.rx++;
1172 }
1173 } else {
1174 tty_insert_flip_char(tty, 0,
1175 TTY_NORMAL);
1176 info->icount.rx++;
1177 }
1178 } else {
1179 /* there was a software buffer
1180 overrun and nothing could be
1181 done about it!!! */
1182 info->icount.buf_overrun++;
1183 info->idle_stats.overruns++;
1184 }
1185 } else { /* normal character reception */
1186 /* load # chars available from the chip */
1187 char_count = readb(base_addr +
1188 (CyRDCR << index));
1189
1190 #ifdef CY_ENABLE_MONITORING
1191 ++info->mon.int_count;
1192 info->mon.char_count += char_count;
1193 if (char_count > info->mon.char_max)
1194 info->mon.char_max = char_count;
1195 info->mon.char_last = char_count;
1196 #endif
1197 len = tty_buffer_request_room(tty, char_count);
1198 while (len--) {
1199 data = readb(base_addr +
1200 (CyRDSR << index));
1201 tty_insert_flip_char(tty, data,
1202 TTY_NORMAL);
1203 info->idle_stats.recv_bytes++;
1204 info->icount.rx++;
1205 #ifdef CY_16Y_HACK
1206 udelay(10L);
1207 #endif
1208 }
1209 info->idle_stats.recv_idle = jiffies;
1210 }
1211 tty_schedule_flip(tty);
1212 }
1213 /* end of service */
1214 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1215 cy_writeb(base_addr + (CyCAR << index), (save_car));
1216 spin_unlock(&cinfo->card_lock);
1217 }
1218
1219 if (status & CySRTransmit) { /* transmission interrupt */
1220 /* Since we only get here when the transmit buffer
1221 is empty, we know we can always stuff a dozen
1222 characters. */
1223 #ifdef CY_DEBUG_INTERRUPTS
1224 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1225 #endif
1226
1227 /* determine the channel & change to that context */
1228 spin_lock(&cinfo->card_lock);
1229 save_xir = (u_char) readb(base_addr + (CyTIR << index));
1230 channel = (u_short) (save_xir & CyIRChannel);
1231 save_car = readb(base_addr + (CyCAR << index));
1232 cy_writeb(base_addr + (CyCAR << index), save_xir);
1233
1234 /* validate the port# (as configured and open) */
1235 if (channel + chip * 4 >= cinfo->nports) {
1236 cy_writeb(base_addr + (CySRER << index),
1237 readb(base_addr + (CySRER << index)) &
1238 ~CyTxRdy);
1239 goto txend;
1240 }
1241 info = &cinfo->ports[channel + chip * 4];
1242 if (info->tty == NULL) {
1243 cy_writeb(base_addr + (CySRER << index),
1244 readb(base_addr + (CySRER << index)) &
1245 ~CyTxRdy);
1246 goto txdone;
1247 }
1248
1249 /* load the on-chip space for outbound data */
1250 char_count = info->xmit_fifo_size;
1251
1252 if (info->x_char) { /* send special char */
1253 outch = info->x_char;
1254 cy_writeb(base_addr + (CyTDR << index), outch);
1255 char_count--;
1256 info->icount.tx++;
1257 info->x_char = 0;
1258 }
1259
1260 if (info->breakon || info->breakoff) {
1261 if (info->breakon) {
1262 cy_writeb(base_addr + (CyTDR << index), 0);
1263 cy_writeb(base_addr + (CyTDR << index), 0x81);
1264 info->breakon = 0;
1265 char_count -= 2;
1266 }
1267 if (info->breakoff) {
1268 cy_writeb(base_addr + (CyTDR << index), 0);
1269 cy_writeb(base_addr + (CyTDR << index), 0x83);
1270 info->breakoff = 0;
1271 char_count -= 2;
1272 }
1273 }
1274
1275 while (char_count-- > 0) {
1276 if (!info->xmit_cnt) {
1277 if (readb(base_addr + (CySRER << index)) &
1278 CyTxMpty) {
1279 cy_writeb(base_addr + (CySRER << index),
1280 readb(base_addr +
1281 (CySRER << index)) &
1282 ~CyTxMpty);
1283 } else {
1284 cy_writeb(base_addr + (CySRER << index),
1285 (readb(base_addr +
1286 (CySRER << index)) &
1287 ~CyTxRdy) | CyTxMpty);
1288 }
1289 goto txdone;
1290 }
1291 if (info->xmit_buf == NULL) {
1292 cy_writeb(base_addr + (CySRER << index),
1293 readb(base_addr + (CySRER << index)) &
1294 ~CyTxRdy);
1295 goto txdone;
1296 }
1297 if (info->tty->stopped || info->tty->hw_stopped) {
1298 cy_writeb(base_addr + (CySRER << index),
1299 readb(base_addr + (CySRER << index)) &
1300 ~CyTxRdy);
1301 goto txdone;
1302 }
1303 /* Because the Embedded Transmit Commands have
1304 been enabled, we must check to see if the
1305 escape character, NULL, is being sent. If it
1306 is, we must ensure that there is room for it
1307 to be doubled in the output stream. Therefore
1308 we no longer advance the pointer when the
1309 character is fetched, but rather wait until
1310 after the check for a NULL output character.
1311 This is necessary because there may not be
1312 room for the two chars needed to send a NULL.)
1313 */
1314 outch = info->xmit_buf[info->xmit_tail];
1315 if (outch) {
1316 info->xmit_cnt--;
1317 info->xmit_tail = (info->xmit_tail + 1) &
1318 (SERIAL_XMIT_SIZE - 1);
1319 cy_writeb(base_addr + (CyTDR << index), outch);
1320 info->icount.tx++;
1321 } else {
1322 if (char_count > 1) {
1323 info->xmit_cnt--;
1324 info->xmit_tail = (info->xmit_tail + 1)&
1325 (SERIAL_XMIT_SIZE - 1);
1326 cy_writeb(base_addr + (CyTDR << index),
1327 outch);
1328 cy_writeb(base_addr + (CyTDR << index),
1329 0);
1330 info->icount.tx++;
1331 char_count--;
1332 }
1333 }
1334 }
1335
1336 txdone:
1337 if (info->xmit_cnt < WAKEUP_CHARS) {
1338 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1339 }
1340 txend:
1341 /* end of service */
1342 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1343 cy_writeb(base_addr + (CyCAR << index), (save_car));
1344 spin_unlock(&cinfo->card_lock);
1345 }
1346
1347 if (status & CySRModem) { /* modem interrupt */
1348
1349 /* determine the channel & change to that context */
1350 spin_lock(&cinfo->card_lock);
1351 save_xir = (u_char) readb(base_addr + (CyMIR << index));
1352 channel = (u_short) (save_xir & CyIRChannel);
1353 info = &cinfo->ports[channel + chip * 4];
1354 save_car = readb(base_addr + (CyCAR << index));
1355 cy_writeb(base_addr + (CyCAR << index), save_xir);
1356
1357 mdm_change = readb(base_addr + (CyMISR << index));
1358 mdm_status = readb(base_addr + (CyMSVR1 << index));
1359
1360 if (info->tty) {
1361 if (mdm_change & CyANY_DELTA) {
1362 /* For statistics only */
1363 if (mdm_change & CyDCD)
1364 info->icount.dcd++;
1365 if (mdm_change & CyCTS)
1366 info->icount.cts++;
1367 if (mdm_change & CyDSR)
1368 info->icount.dsr++;
1369 if (mdm_change & CyRI)
1370 info->icount.rng++;
1371
1372 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1373 }
1374
1375 if ((mdm_change & CyDCD) &&
1376 (info->flags & ASYNC_CHECK_CD)) {
1377 if (mdm_status & CyDCD) {
1378 cy_sched_event(info,
1379 Cy_EVENT_OPEN_WAKEUP);
1380 } else {
1381 cy_sched_event(info, Cy_EVENT_HANGUP);
1382 }
1383 }
1384 if ((mdm_change & CyCTS) &&
1385 (info->flags & ASYNC_CTS_FLOW)) {
1386 if (info->tty->hw_stopped) {
1387 if (mdm_status & CyCTS) {
1388 /* cy_start isn't used
1389 because... !!! */
1390 info->tty->hw_stopped = 0;
1391 cy_writeb(base_addr +
1392 (CySRER << index),
1393 readb(base_addr +
1394 (CySRER <<
1395 index))|
1396 CyTxRdy);
1397 cy_sched_event(info,
1398 Cy_EVENT_WRITE_WAKEUP);
1399 }
1400 } else {
1401 if (!(mdm_status & CyCTS)) {
1402 /* cy_stop isn't used
1403 because ... !!! */
1404 info->tty->hw_stopped = 1;
1405 cy_writeb(base_addr +
1406 (CySRER << index),
1407 readb(base_addr +
1408 (CySRER <<
1409 index)) &
1410 ~CyTxRdy);
1411 }
1412 }
1413 }
1414 /* if (mdm_change & CyDSR) {
1415 }
1416 if (mdm_change & CyRI) {
1417 }*/
1418 }
1419 /* end of service */
1420 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1421 cy_writeb(base_addr + (CyCAR << index), save_car);
1422 spin_unlock(&cinfo->card_lock);
1423 }
1424 }
1425
1426 /* The real interrupt service routine is called
1427 whenever the card wants its hand held--chars
1428 received, out buffer empty, modem change, etc.
1429 */
1430 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1431 {
1432 int status;
1433 struct cyclades_card *cinfo = dev_id;
1434 void __iomem *base_addr, *card_base_addr;
1435 int chip;
1436 int index;
1437 int too_many;
1438 int had_work;
1439
1440 if (unlikely(cinfo == NULL)) {
1441 #ifdef CY_DEBUG_INTERRUPTS
1442 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1443 #endif
1444 return IRQ_NONE; /* spurious interrupt */
1445 }
1446
1447 card_base_addr = cinfo->base_addr;
1448 index = cinfo->bus_index;
1449
1450 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1451 if (unlikely(card_base_addr == NULL))
1452 return IRQ_HANDLED;
1453
1454 /* This loop checks all chips in the card. Make a note whenever
1455 _any_ chip had some work to do, as this is considered an
1456 indication that there will be more to do. Only when no chip
1457 has any work does this outermost loop exit.
1458 */
1459 do {
1460 had_work = 0;
1461 for (chip = 0; chip < cinfo->num_chips; chip++) {
1462 base_addr = cinfo->base_addr +
1463 (cy_chip_offset[chip] << index);
1464 too_many = 0;
1465 while ((status = readb(base_addr +
1466 (CySVRR << index))) != 0x00) {
1467 had_work++;
1468 /* The purpose of the following test is to ensure that
1469 no chip can monopolize the driver. This forces the
1470 chips to be checked in a round-robin fashion (after
1471 draining each of a bunch (1000) of characters).
1472 */
1473 if (1000 < too_many++) {
1474 break;
1475 }
1476 cyy_intr_chip(cinfo, chip, base_addr, status,
1477 index);
1478 }
1479 }
1480 } while (had_work);
1481
1482 /* clear interrupts */
1483 spin_lock(&cinfo->card_lock);
1484 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1485 /* Cy_ClrIntr is 0x1800 */
1486 spin_unlock(&cinfo->card_lock);
1487 return IRQ_HANDLED;
1488 } /* cyy_interrupt */
1489
1490 /***********************************************************/
1491 /********* End of block of Cyclom-Y specific code **********/
1492 /******** Start of block of Cyclades-Z specific code *********/
1493 /***********************************************************/
1494
1495 static int
1496 cyz_fetch_msg(struct cyclades_card *cinfo,
1497 __u32 * channel, __u8 * cmd, __u32 * param)
1498 {
1499 struct FIRM_ID __iomem *firm_id;
1500 struct ZFW_CTRL __iomem *zfw_ctrl;
1501 struct BOARD_CTRL __iomem *board_ctrl;
1502 unsigned long loc_doorbell;
1503
1504 firm_id = cinfo->base_addr + ID_ADDRESS;
1505 if (!ISZLOADED(*cinfo)) {
1506 return -1;
1507 }
1508 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1509 board_ctrl = &zfw_ctrl->board_ctrl;
1510
1511 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1512 (cinfo->ctl_addr))->loc_doorbell);
1513 if (loc_doorbell) {
1514 *cmd = (char)(0xff & loc_doorbell);
1515 *channel = readl(&board_ctrl->fwcmd_channel);
1516 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1517 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1518 loc_doorbell, 0xffffffff);
1519 return 1;
1520 }
1521 return 0;
1522 } /* cyz_fetch_msg */
1523
1524 static int
1525 cyz_issue_cmd(struct cyclades_card *cinfo,
1526 __u32 channel, __u8 cmd, __u32 param)
1527 {
1528 struct FIRM_ID __iomem *firm_id;
1529 struct ZFW_CTRL __iomem *zfw_ctrl;
1530 struct BOARD_CTRL __iomem *board_ctrl;
1531 __u32 __iomem *pci_doorbell;
1532 int index;
1533
1534 firm_id = cinfo->base_addr + ID_ADDRESS;
1535 if (!ISZLOADED(*cinfo)) {
1536 return -1;
1537 }
1538 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1539 board_ctrl = &zfw_ctrl->board_ctrl;
1540
1541 index = 0;
1542 pci_doorbell =
1543 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1544 while ((readl(pci_doorbell) & 0xff) != 0) {
1545 if (index++ == 1000) {
1546 return (int)(readl(pci_doorbell) & 0xff);
1547 }
1548 udelay(50L);
1549 }
1550 cy_writel(&board_ctrl->hcmd_channel, channel);
1551 cy_writel(&board_ctrl->hcmd_param, param);
1552 cy_writel(pci_doorbell, (long)cmd);
1553
1554 return 0;
1555 } /* cyz_issue_cmd */
1556
1557 static void
1558 cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1559 struct BUF_CTRL __iomem *buf_ctrl)
1560 {
1561 struct cyclades_card *cinfo = info->card;
1562 struct tty_struct *tty = info->tty;
1563 int char_count;
1564 int len;
1565 #ifdef BLOCKMOVE
1566 unsigned char *buf;
1567 #else
1568 char data;
1569 #endif
1570 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1571
1572 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1573 rx_put = readl(&buf_ctrl->rx_put);
1574 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1575 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1576 if (rx_put >= rx_get)
1577 char_count = rx_put - rx_get;
1578 else
1579 char_count = rx_put - rx_get + rx_bufsize;
1580
1581 if (char_count) {
1582 #ifdef CY_ENABLE_MONITORING
1583 info->mon.int_count++;
1584 info->mon.char_count += char_count;
1585 if (char_count > info->mon.char_max)
1586 info->mon.char_max = char_count;
1587 info->mon.char_last = char_count;
1588 #endif
1589 if (tty == NULL) {
1590 /* flush received characters */
1591 new_rx_get = (new_rx_get + char_count) &
1592 (rx_bufsize - 1);
1593 info->rflush_count++;
1594 } else {
1595 #ifdef BLOCKMOVE
1596 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1597 for performance, but because of buffer boundaries, there
1598 may be several steps to the operation */
1599 while (1) {
1600 len = tty_prepare_flip_string(tty, &buf,
1601 char_count);
1602 if (!len)
1603 break;
1604
1605 len = min_t(unsigned int, min(len, char_count),
1606 rx_bufsize - new_rx_get);
1607
1608 memcpy_fromio(buf, cinfo->base_addr +
1609 rx_bufaddr + new_rx_get, len);
1610
1611 new_rx_get = (new_rx_get + len) &
1612 (rx_bufsize - 1);
1613 char_count -= len;
1614 info->icount.rx += len;
1615 info->idle_stats.recv_bytes += len;
1616 }
1617 #else
1618 len = tty_buffer_request_room(tty, char_count);
1619 while (len--) {
1620 data = readb(cinfo->base_addr + rx_bufaddr +
1621 new_rx_get);
1622 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1623 tty_insert_flip_char(tty, data, TTY_NORMAL);
1624 info->idle_stats.recv_bytes++;
1625 info->icount.rx++;
1626 }
1627 #endif
1628 #ifdef CONFIG_CYZ_INTR
1629 /* Recalculate the number of chars in the RX buffer and issue
1630 a cmd in case it's higher than the RX high water mark */
1631 rx_put = readl(&buf_ctrl->rx_put);
1632 if (rx_put >= rx_get)
1633 char_count = rx_put - rx_get;
1634 else
1635 char_count = rx_put - rx_get + rx_bufsize;
1636 if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
1637 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1638 }
1639 #endif
1640 info->idle_stats.recv_idle = jiffies;
1641 tty_schedule_flip(tty);
1642 }
1643 /* Update rx_get */
1644 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1645 }
1646 }
1647
1648 static void
1649 cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1650 struct BUF_CTRL __iomem *buf_ctrl)
1651 {
1652 struct cyclades_card *cinfo = info->card;
1653 struct tty_struct *tty = info->tty;
1654 char data;
1655 int char_count;
1656 #ifdef BLOCKMOVE
1657 int small_count;
1658 #endif
1659 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1660
1661 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1662 return;
1663
1664 tx_get = readl(&buf_ctrl->tx_get);
1665 tx_put = readl(&buf_ctrl->tx_put);
1666 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1667 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1668 if (tx_put >= tx_get)
1669 char_count = tx_get - tx_put - 1 + tx_bufsize;
1670 else
1671 char_count = tx_get - tx_put - 1;
1672
1673 if (char_count) {
1674
1675 if (tty == NULL)
1676 goto ztxdone;
1677
1678 if (info->x_char) { /* send special char */
1679 data = info->x_char;
1680
1681 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1682 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1683 info->x_char = 0;
1684 char_count--;
1685 info->icount.tx++;
1686 }
1687 #ifdef BLOCKMOVE
1688 while (0 < (small_count = min_t(unsigned int,
1689 tx_bufsize - tx_put, min_t(unsigned int,
1690 (SERIAL_XMIT_SIZE - info->xmit_tail),
1691 min_t(unsigned int, info->xmit_cnt,
1692 char_count))))) {
1693
1694 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1695 tx_put),
1696 &info->xmit_buf[info->xmit_tail],
1697 small_count);
1698
1699 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1700 char_count -= small_count;
1701 info->icount.tx += small_count;
1702 info->xmit_cnt -= small_count;
1703 info->xmit_tail = (info->xmit_tail + small_count) &
1704 (SERIAL_XMIT_SIZE - 1);
1705 }
1706 #else
1707 while (info->xmit_cnt && char_count) {
1708 data = info->xmit_buf[info->xmit_tail];
1709 info->xmit_cnt--;
1710 info->xmit_tail = (info->xmit_tail + 1) &
1711 (SERIAL_XMIT_SIZE - 1);
1712
1713 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1714 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1715 char_count--;
1716 info->icount.tx++;
1717 }
1718 #endif
1719 ztxdone:
1720 if (info->xmit_cnt < WAKEUP_CHARS) {
1721 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1722 }
1723 /* Update tx_put */
1724 cy_writel(&buf_ctrl->tx_put, tx_put);
1725 }
1726 }
1727
1728 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1729 {
1730 struct tty_struct *tty;
1731 struct cyclades_port *info;
1732 static struct FIRM_ID __iomem *firm_id;
1733 static struct ZFW_CTRL __iomem *zfw_ctrl;
1734 static struct BOARD_CTRL __iomem *board_ctrl;
1735 static struct CH_CTRL __iomem *ch_ctrl;
1736 static struct BUF_CTRL __iomem *buf_ctrl;
1737 __u32 channel;
1738 __u8 cmd;
1739 __u32 param;
1740 __u32 hw_ver, fw_ver;
1741 int special_count;
1742 int delta_count;
1743
1744 firm_id = cinfo->base_addr + ID_ADDRESS;
1745 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1746 board_ctrl = &zfw_ctrl->board_ctrl;
1747 fw_ver = readl(&board_ctrl->fw_version);
1748 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1749 mail_box_0);
1750
1751 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1752 special_count = 0;
1753 delta_count = 0;
1754 info = &cinfo->ports[channel];
1755 if ((tty = info->tty) == NULL)
1756 continue;
1757
1758 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1759 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1760
1761 switch (cmd) {
1762 case C_CM_PR_ERROR:
1763 tty_insert_flip_char(tty, 0, TTY_PARITY);
1764 info->icount.rx++;
1765 special_count++;
1766 break;
1767 case C_CM_FR_ERROR:
1768 tty_insert_flip_char(tty, 0, TTY_FRAME);
1769 info->icount.rx++;
1770 special_count++;
1771 break;
1772 case C_CM_RXBRK:
1773 tty_insert_flip_char(tty, 0, TTY_BREAK);
1774 info->icount.rx++;
1775 special_count++;
1776 break;
1777 case C_CM_MDCD:
1778 info->icount.dcd++;
1779 delta_count++;
1780 if (info->flags & ASYNC_CHECK_CD) {
1781 if ((fw_ver > 241 ? ((u_long) param) :
1782 readl(&ch_ctrl->rs_status)) &
1783 C_RS_DCD) {
1784 cy_sched_event(info,
1785 Cy_EVENT_OPEN_WAKEUP);
1786 } else {
1787 cy_sched_event(info, Cy_EVENT_HANGUP);
1788 }
1789 }
1790 break;
1791 case C_CM_MCTS:
1792 info->icount.cts++;
1793 delta_count++;
1794 break;
1795 case C_CM_MRI:
1796 info->icount.rng++;
1797 delta_count++;
1798 break;
1799 case C_CM_MDSR:
1800 info->icount.dsr++;
1801 delta_count++;
1802 break;
1803 #ifdef Z_WAKE
1804 case C_CM_IOCTLW:
1805 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1806 break;
1807 #endif
1808 #ifdef CONFIG_CYZ_INTR
1809 case C_CM_RXHIWM:
1810 case C_CM_RXNNDT:
1811 case C_CM_INTBACK2:
1812 /* Reception Interrupt */
1813 #ifdef CY_DEBUG_INTERRUPTS
1814 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1815 "port %ld\n", info->card, channel);
1816 #endif
1817 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1818 break;
1819 case C_CM_TXBEMPTY:
1820 case C_CM_TXLOWWM:
1821 case C_CM_INTBACK:
1822 /* Transmission Interrupt */
1823 #ifdef CY_DEBUG_INTERRUPTS
1824 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1825 "port %ld\n", info->card, channel);
1826 #endif
1827 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1828 break;
1829 #endif /* CONFIG_CYZ_INTR */
1830 case C_CM_FATAL:
1831 /* should do something with this !!! */
1832 break;
1833 default:
1834 break;
1835 }
1836 if (delta_count)
1837 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1838 if (special_count)
1839 tty_schedule_flip(tty);
1840 }
1841 }
1842
1843 #ifdef CONFIG_CYZ_INTR
1844 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1845 {
1846 struct cyclades_card *cinfo = dev_id;
1847
1848 if (unlikely(cinfo == NULL)) {
1849 #ifdef CY_DEBUG_INTERRUPTS
1850 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1851 #endif
1852 return IRQ_NONE; /* spurious interrupt */
1853 }
1854
1855 if (unlikely(!ISZLOADED(*cinfo))) {
1856 #ifdef CY_DEBUG_INTERRUPTS
1857 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1858 "(IRQ%d).\n", irq);
1859 #endif
1860 return IRQ_NONE;
1861 }
1862
1863 /* Handle the interrupts */
1864 cyz_handle_cmd(cinfo);
1865
1866 return IRQ_HANDLED;
1867 } /* cyz_interrupt */
1868
1869 static void cyz_rx_restart(unsigned long arg)
1870 {
1871 struct cyclades_port *info = (struct cyclades_port *)arg;
1872 struct cyclades_card *card = info->card;
1873 int retval;
1874 __u32 channel = info->line - card->first_line;
1875 unsigned long flags;
1876
1877 spin_lock_irqsave(&card->card_lock, flags);
1878 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1879 if (retval != 0) {
1880 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1881 info->line, retval);
1882 }
1883 spin_unlock_irqrestore(&card->card_lock, flags);
1884 }
1885
1886 #else /* CONFIG_CYZ_INTR */
1887
1888 static void cyz_poll(unsigned long arg)
1889 {
1890 struct cyclades_card *cinfo;
1891 struct cyclades_port *info;
1892 struct tty_struct *tty;
1893 static struct FIRM_ID *firm_id;
1894 static struct ZFW_CTRL *zfw_ctrl;
1895 static struct BOARD_CTRL *board_ctrl;
1896 static struct CH_CTRL *ch_ctrl;
1897 static struct BUF_CTRL *buf_ctrl;
1898 unsigned long expires = jiffies + HZ;
1899 int card, port;
1900
1901 for (card = 0; card < NR_CARDS; card++) {
1902 cinfo = &cy_card[card];
1903
1904 if (!IS_CYC_Z(*cinfo))
1905 continue;
1906 if (!ISZLOADED(*cinfo))
1907 continue;
1908
1909 firm_id = cinfo->base_addr + ID_ADDRESS;
1910 zfw_ctrl = cinfo->base_addr +
1911 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1912 board_ctrl = &(zfw_ctrl->board_ctrl);
1913
1914 /* Skip first polling cycle to avoid racing conditions with the FW */
1915 if (!cinfo->intr_enabled) {
1916 cinfo->nports = (int)readl(&board_ctrl->n_channel);
1917 cinfo->intr_enabled = 1;
1918 continue;
1919 }
1920
1921 cyz_handle_cmd(cinfo);
1922
1923 for (port = 0; port < cinfo->nports; port++) {
1924 info = &cinfo->ports[port];
1925 tty = info->tty;
1926 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1927 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1928
1929 if (!info->throttle)
1930 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1931 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1932 }
1933 /* poll every 'cyz_polling_cycle' period */
1934 expires = jiffies + cyz_polling_cycle;
1935 }
1936 mod_timer(&cyz_timerlist, expires);
1937 } /* cyz_poll */
1938
1939 #endif /* CONFIG_CYZ_INTR */
1940
1941 /********** End of block of Cyclades-Z specific code *********/
1942 /***********************************************************/
1943
1944 /* This is called whenever a port becomes active;
1945 interrupts are enabled and DTR & RTS are turned on.
1946 */
1947 static int startup(struct cyclades_port *info)
1948 {
1949 struct cyclades_card *card;
1950 unsigned long flags;
1951 int retval = 0;
1952 void __iomem *base_addr;
1953 int chip, channel, index;
1954 unsigned long page;
1955
1956 card = info->card;
1957 channel = info->line - card->first_line;
1958
1959 page = get_zeroed_page(GFP_KERNEL);
1960 if (!page)
1961 return -ENOMEM;
1962
1963 spin_lock_irqsave(&card->card_lock, flags);
1964
1965 if (info->flags & ASYNC_INITIALIZED) {
1966 free_page(page);
1967 goto errout;
1968 }
1969
1970 if (!info->type) {
1971 if (info->tty) {
1972 set_bit(TTY_IO_ERROR, &info->tty->flags);
1973 }
1974 free_page(page);
1975 goto errout;
1976 }
1977
1978 if (info->xmit_buf)
1979 free_page(page);
1980 else
1981 info->xmit_buf = (unsigned char *)page;
1982
1983 spin_unlock_irqrestore(&card->card_lock, flags);
1984
1985 set_line_char(info);
1986
1987 if (!IS_CYC_Z(*card)) {
1988 chip = channel >> 2;
1989 channel &= 0x03;
1990 index = card->bus_index;
1991 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1992
1993 #ifdef CY_DEBUG_OPEN
1994 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1995 "base_addr %p\n",
1996 card, chip, channel, base_addr);
1997 #endif
1998 spin_lock_irqsave(&card->card_lock, flags);
1999
2000 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2001
2002 cy_writeb(base_addr + (CyRTPR << index),
2003 (info->default_timeout ? info->default_timeout : 0x02));
2004 /* 10ms rx timeout */
2005
2006 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2007 index);
2008
2009 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2010 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2011 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
2012
2013 #ifdef CY_DEBUG_DTR
2014 printk(KERN_DEBUG "cyc:startup raising DTR\n");
2015 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2016 readb(base_addr + (CyMSVR1 << index)),
2017 readb(base_addr + (CyMSVR2 << index)));
2018 #endif
2019
2020 cy_writeb(base_addr + (CySRER << index),
2021 readb(base_addr + (CySRER << index)) | CyRxData);
2022 info->flags |= ASYNC_INITIALIZED;
2023
2024 if (info->tty) {
2025 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2026 }
2027 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2028 info->breakon = info->breakoff = 0;
2029 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2030 info->idle_stats.in_use =
2031 info->idle_stats.recv_idle =
2032 info->idle_stats.xmit_idle = jiffies;
2033
2034 spin_unlock_irqrestore(&card->card_lock, flags);
2035
2036 } else {
2037 struct FIRM_ID __iomem *firm_id;
2038 struct ZFW_CTRL __iomem *zfw_ctrl;
2039 struct BOARD_CTRL __iomem *board_ctrl;
2040 struct CH_CTRL __iomem *ch_ctrl;
2041 int retval;
2042
2043 base_addr = card->base_addr;
2044
2045 firm_id = base_addr + ID_ADDRESS;
2046 if (!ISZLOADED(*card)) {
2047 return -ENODEV;
2048 }
2049
2050 zfw_ctrl = card->base_addr +
2051 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2052 board_ctrl = &zfw_ctrl->board_ctrl;
2053 ch_ctrl = zfw_ctrl->ch_ctrl;
2054
2055 #ifdef CY_DEBUG_OPEN
2056 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
2057 "base_addr %p\n", card, channel, base_addr);
2058 #endif
2059 spin_lock_irqsave(&card->card_lock, flags);
2060
2061 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2062 #ifdef Z_WAKE
2063 #ifdef CONFIG_CYZ_INTR
2064 cy_writel(&ch_ctrl[channel].intr_enable,
2065 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2066 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2067 #else
2068 cy_writel(&ch_ctrl[channel].intr_enable,
2069 C_IN_IOCTLW | C_IN_MDCD);
2070 #endif /* CONFIG_CYZ_INTR */
2071 #else
2072 #ifdef CONFIG_CYZ_INTR
2073 cy_writel(&ch_ctrl[channel].intr_enable,
2074 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2075 C_IN_RXNNDT | C_IN_MDCD);
2076 #else
2077 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2078 #endif /* CONFIG_CYZ_INTR */
2079 #endif /* Z_WAKE */
2080
2081 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2082 if (retval != 0) {
2083 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
2084 "%x\n", info->line, retval);
2085 }
2086
2087 /* Flush RX buffers before raising DTR and RTS */
2088 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
2089 if (retval != 0) {
2090 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
2091 "%x\n", info->line, retval);
2092 }
2093
2094 /* set timeout !!! */
2095 /* set RTS and DTR !!! */
2096 cy_writel(&ch_ctrl[channel].rs_control,
2097 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2098 C_RS_DTR);
2099 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2100 if (retval != 0) {
2101 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
2102 "%x\n", info->line, retval);
2103 }
2104 #ifdef CY_DEBUG_DTR
2105 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
2106 #endif
2107
2108 /* enable send, recv, modem !!! */
2109
2110 info->flags |= ASYNC_INITIALIZED;
2111 if (info->tty) {
2112 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2113 }
2114 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2115 info->breakon = info->breakoff = 0;
2116 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2117 info->idle_stats.in_use =
2118 info->idle_stats.recv_idle =
2119 info->idle_stats.xmit_idle = jiffies;
2120
2121 spin_unlock_irqrestore(&card->card_lock, flags);
2122 }
2123
2124 #ifdef CY_DEBUG_OPEN
2125 printk(KERN_DEBUG "cyc startup done\n");
2126 #endif
2127 return 0;
2128
2129 errout:
2130 spin_unlock_irqrestore(&card->card_lock, flags);
2131 return retval;
2132 } /* startup */
2133
2134 static void start_xmit(struct cyclades_port *info)
2135 {
2136 struct cyclades_card *card;
2137 unsigned long flags;
2138 void __iomem *base_addr;
2139 int chip, channel, index;
2140
2141 card = info->card;
2142 channel = info->line - card->first_line;
2143 if (!IS_CYC_Z(*card)) {
2144 chip = channel >> 2;
2145 channel &= 0x03;
2146 index = card->bus_index;
2147 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2148
2149 spin_lock_irqsave(&card->card_lock, flags);
2150 cy_writeb(base_addr + (CyCAR << index), channel);
2151 cy_writeb(base_addr + (CySRER << index),
2152 readb(base_addr + (CySRER << index)) | CyTxRdy);
2153 spin_unlock_irqrestore(&card->card_lock, flags);
2154 } else {
2155 #ifdef CONFIG_CYZ_INTR
2156 int retval;
2157
2158 spin_lock_irqsave(&card->card_lock, flags);
2159 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2160 if (retval != 0) {
2161 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2162 "%x\n", info->line, retval);
2163 }
2164 spin_unlock_irqrestore(&card->card_lock, flags);
2165 #else /* CONFIG_CYZ_INTR */
2166 /* Don't have to do anything at this time */
2167 #endif /* CONFIG_CYZ_INTR */
2168 }
2169 } /* start_xmit */
2170
2171 /*
2172 * This routine shuts down a serial port; interrupts are disabled,
2173 * and DTR is dropped if the hangup on close termio flag is on.
2174 */
2175 static void shutdown(struct cyclades_port *info)
2176 {
2177 struct cyclades_card *card;
2178 unsigned long flags;
2179 void __iomem *base_addr;
2180 int chip, channel, index;
2181
2182 if (!(info->flags & ASYNC_INITIALIZED)) {
2183 return;
2184 }
2185
2186 card = info->card;
2187 channel = info->line - card->first_line;
2188 if (!IS_CYC_Z(*card)) {
2189 chip = channel >> 2;
2190 channel &= 0x03;
2191 index = card->bus_index;
2192 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2193
2194 #ifdef CY_DEBUG_OPEN
2195 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2196 "channel %d, base_addr %p\n",
2197 card, chip, channel, base_addr);
2198 #endif
2199
2200 spin_lock_irqsave(&card->card_lock, flags);
2201
2202 /* Clear delta_msr_wait queue to avoid mem leaks. */
2203 wake_up_interruptible(&info->delta_msr_wait);
2204
2205 if (info->xmit_buf) {
2206 unsigned char *temp;
2207 temp = info->xmit_buf;
2208 info->xmit_buf = NULL;
2209 free_page((unsigned long)temp);
2210 }
2211 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2212 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2213 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2214 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2215 #ifdef CY_DEBUG_DTR
2216 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2217 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2218 readb(base_addr + (CyMSVR1 << index)),
2219 readb(base_addr + (CyMSVR2 << index)));
2220 #endif
2221 }
2222 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2223 /* it may be appropriate to clear _XMIT at
2224 some later date (after testing)!!! */
2225
2226 if (info->tty) {
2227 set_bit(TTY_IO_ERROR, &info->tty->flags);
2228 }
2229 info->flags &= ~ASYNC_INITIALIZED;
2230 spin_unlock_irqrestore(&card->card_lock, flags);
2231 } else {
2232 struct FIRM_ID __iomem *firm_id;
2233 struct ZFW_CTRL __iomem *zfw_ctrl;
2234 struct BOARD_CTRL __iomem *board_ctrl;
2235 struct CH_CTRL __iomem *ch_ctrl;
2236 int retval;
2237
2238 base_addr = card->base_addr;
2239 #ifdef CY_DEBUG_OPEN
2240 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2241 "base_addr %p\n", card, channel, base_addr);
2242 #endif
2243
2244 firm_id = base_addr + ID_ADDRESS;
2245 if (!ISZLOADED(*card)) {
2246 return;
2247 }
2248
2249 zfw_ctrl = card->base_addr +
2250 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2251 board_ctrl = &zfw_ctrl->board_ctrl;
2252 ch_ctrl = zfw_ctrl->ch_ctrl;
2253
2254 spin_lock_irqsave(&card->card_lock, flags);
2255
2256 if (info->xmit_buf) {
2257 unsigned char *temp;
2258 temp = info->xmit_buf;
2259 info->xmit_buf = NULL;
2260 free_page((unsigned long)temp);
2261 }
2262
2263 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2264 cy_writel(&ch_ctrl[channel].rs_control,
2265 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2266 ~(C_RS_RTS | C_RS_DTR)));
2267 retval = cyz_issue_cmd(info->card, channel,
2268 C_CM_IOCTLM, 0L);
2269 if (retval != 0) {
2270 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2271 "was %x\n", info->line, retval);
2272 }
2273 #ifdef CY_DEBUG_DTR
2274 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2275 #endif
2276 }
2277
2278 if (info->tty) {
2279 set_bit(TTY_IO_ERROR, &info->tty->flags);
2280 }
2281 info->flags &= ~ASYNC_INITIALIZED;
2282
2283 spin_unlock_irqrestore(&card->card_lock, flags);
2284 }
2285
2286 #ifdef CY_DEBUG_OPEN
2287 printk(KERN_DEBUG "cyc shutdown done\n");
2288 #endif
2289 } /* shutdown */
2290
2291 /*
2292 * ------------------------------------------------------------
2293 * cy_open() and friends
2294 * ------------------------------------------------------------
2295 */
2296
2297 static int
2298 block_til_ready(struct tty_struct *tty, struct file *filp,
2299 struct cyclades_port *info)
2300 {
2301 DECLARE_WAITQUEUE(wait, current);
2302 struct cyclades_card *cinfo;
2303 unsigned long flags;
2304 int chip, channel, index;
2305 int retval;
2306 void __iomem *base_addr;
2307
2308 cinfo = info->card;
2309 channel = info->line - cinfo->first_line;
2310
2311 /*
2312 * If the device is in the middle of being closed, then block
2313 * until it's done, and then try again.
2314 */
2315 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2316 wait_event_interruptible(info->close_wait,
2317 !(info->flags & ASYNC_CLOSING));
2318 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2319 }
2320
2321 /*
2322 * If non-blocking mode is set, then make the check up front
2323 * and then exit.
2324 */
2325 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2326 info->flags |= ASYNC_NORMAL_ACTIVE;
2327 return 0;
2328 }
2329
2330 /*
2331 * Block waiting for the carrier detect and the line to become
2332 * free (i.e., not in use by the callout). While we are in
2333 * this loop, info->count is dropped by one, so that
2334 * cy_close() knows when to free things. We restore it upon
2335 * exit, either normal or abnormal.
2336 */
2337 retval = 0;
2338 add_wait_queue(&info->open_wait, &wait);
2339 #ifdef CY_DEBUG_OPEN
2340 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2341 "count = %d\n", info->line, info->count);
2342 #endif
2343 spin_lock_irqsave(&cinfo->card_lock, flags);
2344 if (!tty_hung_up_p(filp))
2345 info->count--;
2346 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2347 #ifdef CY_DEBUG_COUNT
2348 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2349 "%d\n", current->pid, info->count);
2350 #endif
2351 info->blocked_open++;
2352
2353 if (!IS_CYC_Z(*cinfo)) {
2354 chip = channel >> 2;
2355 channel &= 0x03;
2356 index = cinfo->bus_index;
2357 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2358
2359 while (1) {
2360 spin_lock_irqsave(&cinfo->card_lock, flags);
2361 if ((tty->termios->c_cflag & CBAUD)) {
2362 cy_writeb(base_addr + (CyCAR << index),
2363 (u_char) channel);
2364 cy_writeb(base_addr + (CyMSVR1 << index),
2365 CyRTS);
2366 cy_writeb(base_addr + (CyMSVR2 << index),
2367 CyDTR);
2368 #ifdef CY_DEBUG_DTR
2369 printk(KERN_DEBUG "cyc:block_til_ready raising "
2370 "DTR\n");
2371 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2372 readb(base_addr + (CyMSVR1 << index)),
2373 readb(base_addr + (CyMSVR2 << index)));
2374 #endif
2375 }
2376 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2377
2378 set_current_state(TASK_INTERRUPTIBLE);
2379 if (tty_hung_up_p(filp) ||
2380 !(info->flags & ASYNC_INITIALIZED)) {
2381 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2382 -EAGAIN : -ERESTARTSYS);
2383 break;
2384 }
2385
2386 spin_lock_irqsave(&cinfo->card_lock, flags);
2387 cy_writeb(base_addr + (CyCAR << index),
2388 (u_char) channel);
2389 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2390 (readb(base_addr +
2391 (CyMSVR1 << index)) & CyDCD))) {
2392 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2393 break;
2394 }
2395 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2396
2397 if (signal_pending(current)) {
2398 retval = -ERESTARTSYS;
2399 break;
2400 }
2401 #ifdef CY_DEBUG_OPEN
2402 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2403 "ttyC%d, count = %d\n",
2404 info->line, info->count);
2405 #endif
2406 schedule();
2407 }
2408 } else {
2409 struct FIRM_ID __iomem *firm_id;
2410 struct ZFW_CTRL __iomem *zfw_ctrl;
2411 struct BOARD_CTRL __iomem *board_ctrl;
2412 struct CH_CTRL __iomem *ch_ctrl;
2413 int retval;
2414
2415 base_addr = cinfo->base_addr;
2416 firm_id = base_addr + ID_ADDRESS;
2417 if (!ISZLOADED(*cinfo)) {
2418 __set_current_state(TASK_RUNNING);
2419 remove_wait_queue(&info->open_wait, &wait);
2420 return -EINVAL;
2421 }
2422
2423 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2424 board_ctrl = &zfw_ctrl->board_ctrl;
2425 ch_ctrl = zfw_ctrl->ch_ctrl;
2426
2427 while (1) {
2428 if ((tty->termios->c_cflag & CBAUD)) {
2429 cy_writel(&ch_ctrl[channel].rs_control,
2430 readl(&ch_ctrl[channel].rs_control) |
2431 C_RS_RTS | C_RS_DTR);
2432 retval = cyz_issue_cmd(cinfo,
2433 channel, C_CM_IOCTLM, 0L);
2434 if (retval != 0) {
2435 printk(KERN_ERR "cyc:block_til_ready "
2436 "retval on ttyC%d was %x\n",
2437 info->line, retval);
2438 }
2439 #ifdef CY_DEBUG_DTR
2440 printk(KERN_DEBUG "cyc:block_til_ready raising "
2441 "Z DTR\n");
2442 #endif
2443 }
2444
2445 set_current_state(TASK_INTERRUPTIBLE);
2446 if (tty_hung_up_p(filp) ||
2447 !(info->flags & ASYNC_INITIALIZED)) {
2448 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2449 -EAGAIN : -ERESTARTSYS);
2450 break;
2451 }
2452 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2453 (readl(&ch_ctrl[channel].rs_status) &
2454 C_RS_DCD))) {
2455 break;
2456 }
2457 if (signal_pending(current)) {
2458 retval = -ERESTARTSYS;
2459 break;
2460 }
2461 #ifdef CY_DEBUG_OPEN
2462 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2463 "ttyC%d, count = %d\n",
2464 info->line, info->count);
2465 #endif
2466 schedule();
2467 }
2468 }
2469 __set_current_state(TASK_RUNNING);
2470 remove_wait_queue(&info->open_wait, &wait);
2471 if (!tty_hung_up_p(filp)) {
2472 info->count++;
2473 #ifdef CY_DEBUG_COUNT
2474 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2475 "count to %d\n", current->pid, info->count);
2476 #endif
2477 }
2478 info->blocked_open--;
2479 #ifdef CY_DEBUG_OPEN
2480 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2481 "count = %d\n", info->line, info->count);
2482 #endif
2483 if (retval)
2484 return retval;
2485 info->flags |= ASYNC_NORMAL_ACTIVE;
2486 return 0;
2487 } /* block_til_ready */
2488
2489 /*
2490 * This routine is called whenever a serial port is opened. It
2491 * performs the serial-specific initialization for the tty structure.
2492 */
2493 static int cy_open(struct tty_struct *tty, struct file *filp)
2494 {
2495 struct cyclades_port *info;
2496 unsigned int i;
2497 int retval, line;
2498
2499 line = tty->index;
2500 if ((line < 0) || (NR_PORTS <= line)) {
2501 return -ENODEV;
2502 }
2503 for (i = 0; i < NR_CARDS; i++)
2504 if (line < cy_card[i].first_line + cy_card[i].nports &&
2505 line >= cy_card[i].first_line)
2506 break;
2507 if (i >= NR_CARDS)
2508 return -ENODEV;
2509 info = &cy_card[i].ports[line - cy_card[i].first_line];
2510 if (info->line < 0) {
2511 return -ENODEV;
2512 }
2513
2514 /* If the card's firmware hasn't been loaded,
2515 treat it as absent from the system. This
2516 will make the user pay attention.
2517 */
2518 if (IS_CYC_Z(*info->card)) {
2519 struct cyclades_card *cinfo = info->card;
2520 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2521
2522 if (!ISZLOADED(*cinfo)) {
2523 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2524 (cinfo->ctl_addr))->mail_box_0)) &&
2525 Z_FPGA_CHECK(*cinfo)) &&
2526 (ZFIRM_HLT == readl(
2527 &firm_id->signature))) {
2528 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2529 "need an external power supply for "
2530 "this number of ports.\nFirmware "
2531 "halted.\n");
2532 } else {
2533 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2534 "yet loaded\n");
2535 }
2536 return -ENODEV;
2537 }
2538 #ifdef CONFIG_CYZ_INTR
2539 else {
2540 /* In case this Z board is operating in interrupt mode, its
2541 interrupts should be enabled as soon as the first open
2542 happens to one of its ports. */
2543 if (!cinfo->intr_enabled) {
2544 struct ZFW_CTRL __iomem *zfw_ctrl;
2545 struct BOARD_CTRL __iomem *board_ctrl;
2546
2547 zfw_ctrl = cinfo->base_addr +
2548 (readl(&firm_id->zfwctrl_addr) &
2549 0xfffff);
2550
2551 board_ctrl = &zfw_ctrl->board_ctrl;
2552
2553 /* Enable interrupts on the PLX chip */
2554 cy_writew(cinfo->ctl_addr + 0x68,
2555 readw(cinfo->ctl_addr + 0x68) | 0x0900);
2556 /* Enable interrupts on the FW */
2557 retval = cyz_issue_cmd(cinfo, 0,
2558 C_CM_IRQ_ENBL, 0L);
2559 if (retval != 0) {
2560 printk(KERN_ERR "cyc:IRQ enable retval "
2561 "was %x\n", retval);
2562 }
2563 cinfo->nports =
2564 (int)readl(&board_ctrl->n_channel);
2565 cinfo->intr_enabled = 1;
2566 }
2567 }
2568 #endif /* CONFIG_CYZ_INTR */
2569 /* Make sure this Z port really exists in hardware */
2570 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2571 return -ENODEV;
2572 }
2573 #ifdef CY_DEBUG_OTHER
2574 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2575 #endif
2576 tty->driver_data = info;
2577 info->tty = tty;
2578 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2579 return -ENODEV;
2580 }
2581 #ifdef CY_DEBUG_OPEN
2582 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2583 info->count);
2584 #endif
2585 info->count++;
2586 #ifdef CY_DEBUG_COUNT
2587 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2588 current->pid, info->count);
2589 #endif
2590
2591 /*
2592 * If the port is the middle of closing, bail out now
2593 */
2594 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2595 wait_event_interruptible(info->close_wait,
2596 !(info->flags & ASYNC_CLOSING));
2597 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2598 }
2599
2600 /*
2601 * Start up serial port
2602 */
2603 retval = startup(info);
2604 if (retval) {
2605 return retval;
2606 }
2607
2608 retval = block_til_ready(tty, filp, info);
2609 if (retval) {
2610 #ifdef CY_DEBUG_OPEN
2611 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2612 "with %d\n", retval);
2613 #endif
2614 return retval;
2615 }
2616
2617 info->throttle = 0;
2618
2619 #ifdef CY_DEBUG_OPEN
2620 printk(KERN_DEBUG "cyc:cy_open done\n");
2621 #endif
2622 return 0;
2623 } /* cy_open */
2624
2625 /*
2626 * cy_wait_until_sent() --- wait until the transmitter is empty
2627 */
2628 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2629 {
2630 struct cyclades_card *card;
2631 struct cyclades_port *info = tty->driver_data;
2632 void __iomem *base_addr;
2633 int chip, channel, index;
2634 unsigned long orig_jiffies;
2635 int char_time;
2636
2637 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2638 return;
2639
2640 if (info->xmit_fifo_size == 0)
2641 return; /* Just in case.... */
2642
2643 orig_jiffies = jiffies;
2644 /*
2645 * Set the check interval to be 1/5 of the estimated time to
2646 * send a single character, and make it at least 1. The check
2647 * interval should also be less than the timeout.
2648 *
2649 * Note: we have to use pretty tight timings here to satisfy
2650 * the NIST-PCTS.
2651 */
2652 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2653 char_time = char_time / 5;
2654 if (char_time <= 0)
2655 char_time = 1;
2656 if (timeout < 0)
2657 timeout = 0;
2658 if (timeout)
2659 char_time = min(char_time, timeout);
2660 /*
2661 * If the transmitter hasn't cleared in twice the approximate
2662 * amount of time to send the entire FIFO, it probably won't
2663 * ever clear. This assumes the UART isn't doing flow
2664 * control, which is currently the case. Hence, if it ever
2665 * takes longer than info->timeout, this is probably due to a
2666 * UART bug of some kind. So, we clamp the timeout parameter at
2667 * 2*info->timeout.
2668 */
2669 if (!timeout || timeout > 2 * info->timeout)
2670 timeout = 2 * info->timeout;
2671 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2672 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2673 timeout, char_time, jiffies);
2674 #endif
2675 card = info->card;
2676 channel = (info->line) - (card->first_line);
2677 if (!IS_CYC_Z(*card)) {
2678 chip = channel >> 2;
2679 channel &= 0x03;
2680 index = card->bus_index;
2681 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2682 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2683 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2684 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2685 #endif
2686 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2687 break;
2688 if (timeout && time_after(jiffies, orig_jiffies +
2689 timeout))
2690 break;
2691 }
2692 }
2693 /* Run one more char cycle */
2694 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2695 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2696 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2697 #endif
2698 }
2699
2700 /*
2701 * This routine is called when a particular tty device is closed.
2702 */
2703 static void cy_close(struct tty_struct *tty, struct file *filp)
2704 {
2705 struct cyclades_port *info = tty->driver_data;
2706 struct cyclades_card *card;
2707 unsigned long flags;
2708
2709 #ifdef CY_DEBUG_OTHER
2710 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2711 #endif
2712
2713 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2714 return;
2715 }
2716
2717 card = info->card;
2718
2719 spin_lock_irqsave(&card->card_lock, flags);
2720 /* If the TTY is being hung up, nothing to do */
2721 if (tty_hung_up_p(filp)) {
2722 spin_unlock_irqrestore(&card->card_lock, flags);
2723 return;
2724 }
2725 #ifdef CY_DEBUG_OPEN
2726 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2727 info->count);
2728 #endif
2729 if ((tty->count == 1) && (info->count != 1)) {
2730 /*
2731 * Uh, oh. tty->count is 1, which means that the tty
2732 * structure will be freed. Info->count should always
2733 * be one in these conditions. If it's greater than
2734 * one, we've got real problems, since it means the
2735 * serial port won't be shutdown.
2736 */
2737 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2738 "tty->count is 1, info->count is %d\n", info->count);
2739 info->count = 1;
2740 }
2741 #ifdef CY_DEBUG_COUNT
2742 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
2743 current->pid, info->count - 1);
2744 #endif
2745 if (--info->count < 0) {
2746 #ifdef CY_DEBUG_COUNT
2747 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2748 #endif
2749 info->count = 0;
2750 }
2751 if (info->count) {
2752 spin_unlock_irqrestore(&card->card_lock, flags);
2753 return;
2754 }
2755 info->flags |= ASYNC_CLOSING;
2756
2757 /*
2758 * Now we wait for the transmit buffer to clear; and we notify
2759 * the line discipline to only process XON/XOFF characters.
2760 */
2761 tty->closing = 1;
2762 spin_unlock_irqrestore(&card->card_lock, flags);
2763 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2764 tty_wait_until_sent(tty, info->closing_wait);
2765 }
2766 spin_lock_irqsave(&card->card_lock, flags);
2767
2768 if (!IS_CYC_Z(*card)) {
2769 int channel = info->line - card->first_line;
2770 int index = card->bus_index;
2771 void __iomem *base_addr = card->base_addr +
2772 (cy_chip_offset[channel >> 2] << index);
2773 /* Stop accepting input */
2774 channel &= 0x03;
2775 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2776 cy_writeb(base_addr + (CySRER << index),
2777 readb(base_addr + (CySRER << index)) & ~CyRxData);
2778 if (info->flags & ASYNC_INITIALIZED) {
2779 /* Waiting for on-board buffers to be empty before closing
2780 the port */
2781 spin_unlock_irqrestore(&card->card_lock, flags);
2782 cy_wait_until_sent(tty, info->timeout);
2783 spin_lock_irqsave(&card->card_lock, flags);
2784 }
2785 } else {
2786 #ifdef Z_WAKE
2787 /* Waiting for on-board buffers to be empty before closing the port */
2788 void __iomem *base_addr = card->base_addr;
2789 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2790 struct ZFW_CTRL __iomem *zfw_ctrl =
2791 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2792 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2793 int channel = info->line - card->first_line;
2794 int retval;
2795
2796 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2797 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2798 if (retval != 0) {
2799 printk(KERN_DEBUG "cyc:cy_close retval on "
2800 "ttyC%d was %x\n", info->line, retval);
2801 }
2802 spin_unlock_irqrestore(&card->card_lock, flags);
2803 wait_for_completion_interruptible(&info->shutdown_wait);
2804 spin_lock_irqsave(&card->card_lock, flags);
2805 }
2806 #endif
2807 }
2808
2809 spin_unlock_irqrestore(&card->card_lock, flags);
2810 shutdown(info);
2811 if (tty->driver->flush_buffer)
2812 tty->driver->flush_buffer(tty);
2813 tty_ldisc_flush(tty);
2814 spin_lock_irqsave(&card->card_lock, flags);
2815
2816 tty->closing = 0;
2817 info->event = 0;
2818 info->tty = NULL;
2819 if (info->blocked_open) {
2820 spin_unlock_irqrestore(&card->card_lock, flags);
2821 if (info->close_delay) {
2822 msleep_interruptible(jiffies_to_msecs
2823 (info->close_delay));
2824 }
2825 wake_up_interruptible(&info->open_wait);
2826 spin_lock_irqsave(&card->card_lock, flags);
2827 }
2828 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2829 wake_up_interruptible(&info->close_wait);
2830
2831 #ifdef CY_DEBUG_OTHER
2832 printk(KERN_DEBUG "cyc:cy_close done\n");
2833 #endif
2834
2835 spin_unlock_irqrestore(&card->card_lock, flags);
2836 } /* cy_close */
2837
2838 /* This routine gets called when tty_write has put something into
2839 * the write_queue. The characters may come from user space or
2840 * kernel space.
2841 *
2842 * This routine will return the number of characters actually
2843 * accepted for writing.
2844 *
2845 * If the port is not already transmitting stuff, start it off by
2846 * enabling interrupts. The interrupt service routine will then
2847 * ensure that the characters are sent.
2848 * If the port is already active, there is no need to kick it.
2849 *
2850 */
2851 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2852 {
2853 struct cyclades_port *info = tty->driver_data;
2854 unsigned long flags;
2855 int c, ret = 0;
2856
2857 #ifdef CY_DEBUG_IO
2858 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2859 #endif
2860
2861 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2862 return 0;
2863 }
2864
2865 if (!info->xmit_buf)
2866 return 0;
2867
2868 spin_lock_irqsave(&info->card->card_lock, flags);
2869 while (1) {
2870 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2871 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2872
2873 if (c <= 0)
2874 break;
2875
2876 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2877 info->xmit_head = (info->xmit_head + c) &
2878 (SERIAL_XMIT_SIZE - 1);
2879 info->xmit_cnt += c;
2880 buf += c;
2881 count -= c;
2882 ret += c;
2883 }
2884 spin_unlock_irqrestore(&info->card->card_lock, flags);
2885
2886 info->idle_stats.xmit_bytes += ret;
2887 info->idle_stats.xmit_idle = jiffies;
2888
2889 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2890 start_xmit(info);
2891 }
2892 return ret;
2893 } /* cy_write */
2894
2895 /*
2896 * This routine is called by the kernel to write a single
2897 * character to the tty device. If the kernel uses this routine,
2898 * it must call the flush_chars() routine (if defined) when it is
2899 * done stuffing characters into the driver. If there is no room
2900 * in the queue, the character is ignored.
2901 */
2902 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2903 {
2904 struct cyclades_port *info = tty->driver_data;
2905 unsigned long flags;
2906
2907 #ifdef CY_DEBUG_IO
2908 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2909 #endif
2910
2911 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2912 return;
2913
2914 if (!info->xmit_buf)
2915 return;
2916
2917 spin_lock_irqsave(&info->card->card_lock, flags);
2918 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2919 spin_unlock_irqrestore(&info->card->card_lock, flags);
2920 return;
2921 }
2922
2923 info->xmit_buf[info->xmit_head++] = ch;
2924 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2925 info->xmit_cnt++;
2926 info->idle_stats.xmit_bytes++;
2927 info->idle_stats.xmit_idle = jiffies;
2928 spin_unlock_irqrestore(&info->card->card_lock, flags);
2929 } /* cy_put_char */
2930
2931 /*
2932 * This routine is called by the kernel after it has written a
2933 * series of characters to the tty device using put_char().
2934 */
2935 static void cy_flush_chars(struct tty_struct *tty)
2936 {
2937 struct cyclades_port *info = tty->driver_data;
2938
2939 #ifdef CY_DEBUG_IO
2940 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2941 #endif
2942
2943 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2944 return;
2945
2946 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2947 !info->xmit_buf)
2948 return;
2949
2950 start_xmit(info);
2951 } /* cy_flush_chars */
2952
2953 /*
2954 * This routine returns the numbers of characters the tty driver
2955 * will accept for queuing to be written. This number is subject
2956 * to change as output buffers get emptied, or if the output flow
2957 * control is activated.
2958 */
2959 static int cy_write_room(struct tty_struct *tty)
2960 {
2961 struct cyclades_port *info = tty->driver_data;
2962 int ret;
2963
2964 #ifdef CY_DEBUG_IO
2965 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2966 #endif
2967
2968 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2969 return 0;
2970 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2971 if (ret < 0)
2972 ret = 0;
2973 return ret;
2974 } /* cy_write_room */
2975
2976 static int cy_chars_in_buffer(struct tty_struct *tty)
2977 {
2978 struct cyclades_card *card;
2979 struct cyclades_port *info = tty->driver_data;
2980 int channel;
2981
2982 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2983 return 0;
2984
2985 card = info->card;
2986 channel = (info->line) - (card->first_line);
2987
2988 #ifdef Z_EXT_CHARS_IN_BUFFER
2989 if (!IS_CYC_Z(cy_card[card])) {
2990 #endif /* Z_EXT_CHARS_IN_BUFFER */
2991 #ifdef CY_DEBUG_IO
2992 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2993 info->line, info->xmit_cnt);
2994 #endif
2995 return info->xmit_cnt;
2996 #ifdef Z_EXT_CHARS_IN_BUFFER
2997 } else {
2998 static struct FIRM_ID *firm_id;
2999 static struct ZFW_CTRL *zfw_ctrl;
3000 static struct CH_CTRL *ch_ctrl;
3001 static struct BUF_CTRL *buf_ctrl;
3002 int char_count;
3003 __u32 tx_put, tx_get, tx_bufsize;
3004
3005 firm_id = card->base_addr + ID_ADDRESS;
3006 zfw_ctrl = card->base_addr +
3007 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3008 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3009 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3010
3011 tx_get = readl(&buf_ctrl->tx_get);
3012 tx_put = readl(&buf_ctrl->tx_put);
3013 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
3014 if (tx_put >= tx_get)
3015 char_count = tx_put - tx_get;
3016 else
3017 char_count = tx_put - tx_get + tx_bufsize;
3018 #ifdef CY_DEBUG_IO
3019 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
3020 info->line, info->xmit_cnt + char_count);
3021 #endif
3022 return info->xmit_cnt + char_count;
3023 }
3024 #endif /* Z_EXT_CHARS_IN_BUFFER */
3025 } /* cy_chars_in_buffer */
3026
3027 /*
3028 * ------------------------------------------------------------
3029 * cy_ioctl() and friends
3030 * ------------------------------------------------------------
3031 */
3032
3033 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
3034 {
3035 int co, co_val, bpr;
3036 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3037 25000000);
3038
3039 if (baud == 0) {
3040 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3041 return;
3042 }
3043
3044 /* determine which prescaler to use */
3045 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3046 if (cy_clock / co_val / baud > 63)
3047 break;
3048 }
3049
3050 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3051 if (bpr > 255)
3052 bpr = 255;
3053
3054 info->tbpr = info->rbpr = bpr;
3055 info->tco = info->rco = co;
3056 }
3057
3058 /*
3059 * This routine finds or computes the various line characteristics.
3060 * It used to be called config_setup
3061 */
3062 static void set_line_char(struct cyclades_port *info)
3063 {
3064 struct cyclades_card *card;
3065 unsigned long flags;
3066 void __iomem *base_addr;
3067 int chip, channel, index;
3068 unsigned cflag, iflag;
3069 unsigned short chip_number;
3070 int baud, baud_rate = 0;
3071 int i;
3072
3073 if (!info->tty || !info->tty->termios) {
3074 return;
3075 }
3076 if (info->line == -1) {
3077 return;
3078 }
3079 cflag = info->tty->termios->c_cflag;
3080 iflag = info->tty->termios->c_iflag;
3081
3082 /*
3083 * Set up the tty->alt_speed kludge
3084 */
3085 if (info->tty) {
3086 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3087 info->tty->alt_speed = 57600;
3088 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3089 info->tty->alt_speed = 115200;
3090 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3091 info->tty->alt_speed = 230400;
3092 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3093 info->tty->alt_speed = 460800;
3094 }
3095
3096 card = info->card;
3097 channel = info->line - card->first_line;
3098 chip_number = channel / 4;
3099
3100 if (!IS_CYC_Z(*card)) {
3101
3102 index = card->bus_index;
3103
3104 /* baud rate */
3105 baud = tty_get_baud_rate(info->tty);
3106 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3107 ASYNC_SPD_CUST) {
3108 if (info->custom_divisor)
3109 baud_rate = info->baud / info->custom_divisor;
3110 else
3111 baud_rate = info->baud;
3112 } else if (baud > CD1400_MAX_SPEED) {
3113 baud = CD1400_MAX_SPEED;
3114 }
3115 /* find the baud index */
3116 for (i = 0; i < 20; i++) {
3117 if (baud == baud_table[i]) {
3118 break;
3119 }
3120 }
3121 if (i == 20) {
3122 i = 19; /* CD1400_MAX_SPEED */
3123 }
3124
3125 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3126 ASYNC_SPD_CUST) {
3127 cyy_baud_calc(info, baud_rate);
3128 } else {
3129 if (info->chip_rev >= CD1400_REV_J) {
3130 /* It is a CD1400 rev. J or later */
3131 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3132 info->tco = baud_co_60[i]; /* Tx CO */
3133 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3134 info->rco = baud_co_60[i]; /* Rx CO */
3135 } else {
3136 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3137 info->tco = baud_co_25[i]; /* Tx CO */
3138 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3139 info->rco = baud_co_25[i]; /* Rx CO */
3140 }
3141 }
3142 if (baud_table[i] == 134) {
3143 /* get it right for 134.5 baud */
3144 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3145 2;
3146 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3147 ASYNC_SPD_CUST) {
3148 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3149 baud_rate) + 2;
3150 } else if (baud_table[i]) {
3151 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3152 baud_table[i]) + 2;
3153 /* this needs to be propagated into the card info */
3154 } else {
3155 info->timeout = 0;
3156 }
3157 /* By tradition (is it a standard?) a baud rate of zero
3158 implies the line should be/has been closed. A bit
3159 later in this routine such a test is performed. */
3160
3161 /* byte size and parity */
3162 info->cor5 = 0;
3163 info->cor4 = 0;
3164 /* receive threshold */
3165 info->cor3 = (info->default_threshold ?
3166 info->default_threshold : baud_cor3[i]);
3167 info->cor2 = CyETC;
3168 switch (cflag & CSIZE) {
3169 case CS5:
3170 info->cor1 = Cy_5_BITS;
3171 break;
3172 case CS6:
3173 info->cor1 = Cy_6_BITS;
3174 break;
3175 case CS7:
3176 info->cor1 = Cy_7_BITS;
3177 break;
3178 case CS8:
3179 info->cor1 = Cy_8_BITS;
3180 break;
3181 }
3182 if (cflag & CSTOPB) {
3183 info->cor1 |= Cy_2_STOP;
3184 }
3185 if (cflag & PARENB) {
3186 if (cflag & PARODD) {
3187 info->cor1 |= CyPARITY_O;
3188 } else {
3189 info->cor1 |= CyPARITY_E;
3190 }
3191 } else {
3192 info->cor1 |= CyPARITY_NONE;
3193 }
3194
3195 /* CTS flow control flag */
3196 if (cflag & CRTSCTS) {
3197 info->flags |= ASYNC_CTS_FLOW;
3198 info->cor2 |= CyCtsAE;
3199 } else {
3200 info->flags &= ~ASYNC_CTS_FLOW;
3201 info->cor2 &= ~CyCtsAE;
3202 }
3203 if (cflag & CLOCAL)
3204 info->flags &= ~ASYNC_CHECK_CD;
3205 else
3206 info->flags |= ASYNC_CHECK_CD;
3207
3208 /***********************************************
3209 The hardware option, CyRtsAO, presents RTS when
3210 the chip has characters to send. Since most modems
3211 use RTS as reverse (inbound) flow control, this
3212 option is not used. If inbound flow control is
3213 necessary, DTR can be programmed to provide the
3214 appropriate signals for use with a non-standard
3215 cable. Contact Marcio Saito for details.
3216 ***********************************************/
3217
3218 chip = channel >> 2;
3219 channel &= 0x03;
3220 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3221
3222 spin_lock_irqsave(&card->card_lock, flags);
3223 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3224
3225 /* tx and rx baud rate */
3226
3227 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3228 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3229 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3230 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3231
3232 /* set line characteristics according configuration */
3233
3234 cy_writeb(base_addr + (CySCHR1 << index),
3235 START_CHAR(info->tty));
3236 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3237 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3238 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3239 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3240 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3241 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3242
3243 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3244 CyCOR3ch, index);
3245
3246 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3247 cy_writeb(base_addr + (CyRTPR << index),
3248 (info->default_timeout ? info->default_timeout : 0x02));
3249 /* 10ms rx timeout */
3250
3251 if (C_CLOCAL(info->tty)) {
3252 /* without modem intr */
3253 cy_writeb(base_addr + (CySRER << index),
3254 readb(base_addr + (CySRER << index)) | CyMdmCh);
3255 /* act on 1->0 modem transitions */
3256 if ((cflag & CRTSCTS) && info->rflow) {
3257 cy_writeb(base_addr + (CyMCOR1 << index),
3258 (CyCTS | rflow_thr[i]));
3259 } else {
3260 cy_writeb(base_addr + (CyMCOR1 << index),
3261 CyCTS);
3262 }
3263 /* act on 0->1 modem transitions */
3264 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3265 } else {
3266 /* without modem intr */
3267 cy_writeb(base_addr + (CySRER << index),
3268 readb(base_addr +
3269 (CySRER << index)) | CyMdmCh);
3270 /* act on 1->0 modem transitions */
3271 if ((cflag & CRTSCTS) && info->rflow) {
3272 cy_writeb(base_addr + (CyMCOR1 << index),
3273 (CyDSR | CyCTS | CyRI | CyDCD |
3274 rflow_thr[i]));
3275 } else {
3276 cy_writeb(base_addr + (CyMCOR1 << index),
3277 CyDSR | CyCTS | CyRI | CyDCD);
3278 }
3279 /* act on 0->1 modem transitions */
3280 cy_writeb(base_addr + (CyMCOR2 << index),
3281 CyDSR | CyCTS | CyRI | CyDCD);
3282 }
3283
3284 if (i == 0) { /* baud rate is zero, turn off line */
3285 if (info->rtsdtr_inv) {
3286 cy_writeb(base_addr + (CyMSVR1 << index),
3287 ~CyRTS);
3288 } else {
3289 cy_writeb(base_addr + (CyMSVR2 << index),
3290 ~CyDTR);
3291 }
3292 #ifdef CY_DEBUG_DTR
3293 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3294 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3295 readb(base_addr + (CyMSVR1 << index)),
3296 readb(base_addr + (CyMSVR2 << index)));
3297 #endif
3298 } else {
3299 if (info->rtsdtr_inv) {
3300 cy_writeb(base_addr + (CyMSVR1 << index),
3301 CyRTS);
3302 } else {
3303 cy_writeb(base_addr + (CyMSVR2 << index),
3304 CyDTR);
3305 }
3306 #ifdef CY_DEBUG_DTR
3307 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3308 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3309 readb(base_addr + (CyMSVR1 << index)),
3310 readb(base_addr + (CyMSVR2 << index)));
3311 #endif
3312 }
3313
3314 if (info->tty) {
3315 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3316 }
3317 spin_unlock_irqrestore(&card->card_lock, flags);
3318
3319 } else {
3320 struct FIRM_ID __iomem *firm_id;
3321 struct ZFW_CTRL __iomem *zfw_ctrl;
3322 struct BOARD_CTRL __iomem *board_ctrl;
3323 struct CH_CTRL __iomem *ch_ctrl;
3324 struct BUF_CTRL __iomem *buf_ctrl;
3325 __u32 sw_flow;
3326 int retval;
3327
3328 firm_id = card->base_addr + ID_ADDRESS;
3329 if (!ISZLOADED(*card)) {
3330 return;
3331 }
3332
3333 zfw_ctrl = card->base_addr +
3334 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3335 board_ctrl = &zfw_ctrl->board_ctrl;
3336 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3337 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3338
3339 /* baud rate */
3340 baud = tty_get_baud_rate(info->tty);
3341 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3342 ASYNC_SPD_CUST) {
3343 if (info->custom_divisor)
3344 baud_rate = info->baud / info->custom_divisor;
3345 else
3346 baud_rate = info->baud;
3347 } else if (baud > CYZ_MAX_SPEED) {
3348 baud = CYZ_MAX_SPEED;
3349 }
3350 cy_writel(&ch_ctrl->comm_baud, baud);
3351
3352 if (baud == 134) {
3353 /* get it right for 134.5 baud */
3354 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3355 2;
3356 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3357 ASYNC_SPD_CUST) {
3358 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3359 baud_rate) + 2;
3360 } else if (baud) {
3361 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3362 baud) + 2;
3363 /* this needs to be propagated into the card info */
3364 } else {
3365 info->timeout = 0;
3366 }
3367
3368 /* byte size and parity */
3369 switch (cflag & CSIZE) {
3370 case CS5:
3371 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3372 break;
3373 case CS6:
3374 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3375 break;
3376 case CS7:
3377 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3378 break;
3379 case CS8:
3380 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3381 break;
3382 }
3383 if (cflag & CSTOPB) {
3384 cy_writel(&ch_ctrl->comm_data_l,
3385 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3386 } else {
3387 cy_writel(&ch_ctrl->comm_data_l,
3388 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3389 }
3390 if (cflag & PARENB) {
3391 if (cflag & PARODD) {
3392 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3393 } else {
3394 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3395 }
3396 } else {
3397 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3398 }
3399
3400 /* CTS flow control flag */
3401 if (cflag & CRTSCTS) {
3402 cy_writel(&ch_ctrl->hw_flow,
3403 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3404 } else {
3405 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3406 ~(C_RS_CTS | C_RS_RTS));
3407 }
3408 /* As the HW flow control is done in firmware, the driver
3409 doesn't need to care about it */
3410 info->flags &= ~ASYNC_CTS_FLOW;
3411
3412 /* XON/XOFF/XANY flow control flags */
3413 sw_flow = 0;
3414 if (iflag & IXON) {
3415 sw_flow |= C_FL_OXX;
3416 if (iflag & IXANY)
3417 sw_flow |= C_FL_OIXANY;
3418 }
3419 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3420
3421 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3422 if (retval != 0) {
3423 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3424 "was %x\n", info->line, retval);
3425 }
3426
3427 /* CD sensitivity */
3428 if (cflag & CLOCAL) {
3429 info->flags &= ~ASYNC_CHECK_CD;
3430 } else {
3431 info->flags |= ASYNC_CHECK_CD;
3432 }
3433
3434 if (baud == 0) { /* baud rate is zero, turn off line */
3435 cy_writel(&ch_ctrl->rs_control,
3436 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3437 #ifdef CY_DEBUG_DTR
3438 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3439 #endif
3440 } else {
3441 cy_writel(&ch_ctrl->rs_control,
3442 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3443 #ifdef CY_DEBUG_DTR
3444 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3445 #endif
3446 }
3447
3448 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3449 if (retval != 0) {
3450 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3451 "was %x\n", info->line, retval);
3452 }
3453
3454 if (info->tty) {
3455 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3456 }
3457 }
3458 } /* set_line_char */
3459
3460 static int
3461 get_serial_info(struct cyclades_port *info,
3462 struct serial_struct __user * retinfo)
3463 {
3464 struct serial_struct tmp;
3465 struct cyclades_card *cinfo = info->card;
3466
3467 if (!retinfo)
3468 return -EFAULT;
3469 memset(&tmp, 0, sizeof(tmp));
3470 tmp.type = info->type;
3471 tmp.line = info->line;
3472 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3473 cinfo->first_line;
3474 tmp.irq = cinfo->irq;
3475 tmp.flags = info->flags;
3476 tmp.close_delay = info->close_delay;
3477 tmp.closing_wait = info->closing_wait;
3478 tmp.baud_base = info->baud;
3479 tmp.custom_divisor = info->custom_divisor;
3480 tmp.hub6 = 0; /*!!! */
3481 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3482 } /* get_serial_info */
3483
3484 static int
3485 set_serial_info(struct cyclades_port *info,
3486 struct serial_struct __user * new_info)
3487 {
3488 struct serial_struct new_serial;
3489 struct cyclades_port old_info;
3490
3491 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3492 return -EFAULT;
3493 old_info = *info;
3494
3495 if (!capable(CAP_SYS_ADMIN)) {
3496 if (new_serial.close_delay != info->close_delay ||
3497 new_serial.baud_base != info->baud ||
3498 (new_serial.flags & ASYNC_FLAGS &
3499 ~ASYNC_USR_MASK) !=
3500 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3501 return -EPERM;
3502 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3503 (new_serial.flags & ASYNC_USR_MASK);
3504 info->baud = new_serial.baud_base;
3505 info->custom_divisor = new_serial.custom_divisor;
3506 goto check_and_exit;
3507 }
3508
3509 /*
3510 * OK, past this point, all the error checking has been done.
3511 * At this point, we start making changes.....
3512 */
3513
3514 info->baud = new_serial.baud_base;
3515 info->custom_divisor = new_serial.custom_divisor;
3516 info->flags = (info->flags & ~ASYNC_FLAGS) |
3517 (new_serial.flags & ASYNC_FLAGS);
3518 info->close_delay = new_serial.close_delay * HZ / 100;
3519 info->closing_wait = new_serial.closing_wait * HZ / 100;
3520
3521 check_and_exit:
3522 if (info->flags & ASYNC_INITIALIZED) {
3523 set_line_char(info);
3524 return 0;
3525 } else {
3526 return startup(info);
3527 }
3528 } /* set_serial_info */
3529
3530 /*
3531 * get_lsr_info - get line status register info
3532 *
3533 * Purpose: Let user call ioctl() to get info when the UART physically
3534 * is emptied. On bus types like RS485, the transmitter must
3535 * release the bus after transmitting. This must be done when
3536 * the transmit shift register is empty, not be done when the
3537 * transmit holding register is empty. This functionality
3538 * allows an RS485 driver to be written in user space.
3539 */
3540 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3541 {
3542 struct cyclades_card *card;
3543 int chip, channel, index;
3544 unsigned char status;
3545 unsigned int result;
3546 unsigned long flags;
3547 void __iomem *base_addr;
3548
3549 card = info->card;
3550 channel = (info->line) - (card->first_line);
3551 if (!IS_CYC_Z(*card)) {
3552 chip = channel >> 2;
3553 channel &= 0x03;
3554 index = card->bus_index;
3555 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3556
3557 spin_lock_irqsave(&card->card_lock, flags);
3558 status = readb(base_addr + (CySRER << index)) &
3559 (CyTxRdy | CyTxMpty);
3560 spin_unlock_irqrestore(&card->card_lock, flags);
3561 result = (status ? 0 : TIOCSER_TEMT);
3562 } else {
3563 /* Not supported yet */
3564 return -EINVAL;
3565 }
3566 return put_user(result, (unsigned long __user *)value);
3567 }
3568
3569 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3570 {
3571 struct cyclades_port *info = tty->driver_data;
3572 struct cyclades_card *card;
3573 int chip, channel, index;
3574 void __iomem *base_addr;
3575 unsigned long flags;
3576 unsigned char status;
3577 unsigned long lstatus;
3578 unsigned int result;
3579 struct FIRM_ID __iomem *firm_id;
3580 struct ZFW_CTRL __iomem *zfw_ctrl;
3581 struct BOARD_CTRL __iomem *board_ctrl;
3582 struct CH_CTRL __iomem *ch_ctrl;
3583
3584 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3585 return -ENODEV;
3586
3587 card = info->card;
3588 channel = info->line - card->first_line;
3589 if (!IS_CYC_Z(*card)) {
3590 chip = channel >> 2;
3591 channel &= 0x03;
3592 index = card->bus_index;
3593 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3594
3595 spin_lock_irqsave(&card->card_lock, flags);
3596 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3597 status = readb(base_addr + (CyMSVR1 << index));
3598 status |= readb(base_addr + (CyMSVR2 << index));
3599 spin_unlock_irqrestore(&card->card_lock, flags);
3600
3601 if (info->rtsdtr_inv) {
3602 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3603 ((status & CyDTR) ? TIOCM_RTS : 0);
3604 } else {
3605 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3606 ((status & CyDTR) ? TIOCM_DTR : 0);
3607 }
3608 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3609 ((status & CyRI) ? TIOCM_RNG : 0) |
3610 ((status & CyDSR) ? TIOCM_DSR : 0) |
3611 ((status & CyCTS) ? TIOCM_CTS : 0);
3612 } else {
3613 base_addr = card->base_addr;
3614 firm_id = card->base_addr + ID_ADDRESS;
3615 if (ISZLOADED(*card)) {
3616 zfw_ctrl = card->base_addr +
3617 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3618 board_ctrl = &zfw_ctrl->board_ctrl;
3619 ch_ctrl = zfw_ctrl->ch_ctrl;
3620 lstatus = readl(&ch_ctrl[channel].rs_status);
3621 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3622 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3623 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3624 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3625 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3626 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3627 } else {
3628 result = 0;
3629 return -ENODEV;
3630 }
3631
3632 }
3633 return result;
3634 } /* cy_tiomget */
3635
3636 static int
3637 cy_tiocmset(struct tty_struct *tty, struct file *file,
3638 unsigned int set, unsigned int clear)
3639 {
3640 struct cyclades_port *info = tty->driver_data;
3641 struct cyclades_card *card;
3642 int chip, channel, index;
3643 void __iomem *base_addr;
3644 unsigned long flags;
3645 struct FIRM_ID __iomem *firm_id;
3646 struct ZFW_CTRL __iomem *zfw_ctrl;
3647 struct BOARD_CTRL __iomem *board_ctrl;
3648 struct CH_CTRL __iomem *ch_ctrl;
3649 int retval;
3650
3651 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3652 return -ENODEV;
3653
3654 card = info->card;
3655 channel = (info->line) - (card->first_line);
3656 if (!IS_CYC_Z(*card)) {
3657 chip = channel >> 2;
3658 channel &= 0x03;
3659 index = card->bus_index;
3660 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3661
3662 if (set & TIOCM_RTS) {
3663 spin_lock_irqsave(&card->card_lock, flags);
3664 cy_writeb(base_addr + (CyCAR << index),
3665 (u_char) channel);
3666 if (info->rtsdtr_inv) {
3667 cy_writeb(base_addr + (CyMSVR2 << index),
3668 CyDTR);
3669 } else {
3670 cy_writeb(base_addr + (CyMSVR1 << index),
3671 CyRTS);
3672 }
3673 spin_unlock_irqrestore(&card->card_lock, flags);
3674 }
3675 if (clear & TIOCM_RTS) {
3676 spin_lock_irqsave(&card->card_lock, flags);
3677 cy_writeb(base_addr + (CyCAR << index),
3678 (u_char) channel);
3679 if (info->rtsdtr_inv) {
3680 cy_writeb(base_addr + (CyMSVR2 << index),
3681 ~CyDTR);
3682 } else {
3683 cy_writeb(base_addr + (CyMSVR1 << index),
3684 ~CyRTS);
3685 }
3686 spin_unlock_irqrestore(&card->card_lock, flags);
3687 }
3688 if (set & TIOCM_DTR) {
3689 spin_lock_irqsave(&card->card_lock, flags);
3690 cy_writeb(base_addr + (CyCAR << index),
3691 (u_char) channel);
3692 if (info->rtsdtr_inv) {
3693 cy_writeb(base_addr + (CyMSVR1 << index),
3694 CyRTS);
3695 } else {
3696 cy_writeb(base_addr + (CyMSVR2 << index),
3697 CyDTR);
3698 }
3699 #ifdef CY_DEBUG_DTR
3700 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3701 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3702 readb(base_addr + (CyMSVR1 << index)),
3703 readb(base_addr + (CyMSVR2 << index)));
3704 #endif
3705 spin_unlock_irqrestore(&card->card_lock, flags);
3706 }
3707 if (clear & TIOCM_DTR) {
3708 spin_lock_irqsave(&card->card_lock, flags);
3709 cy_writeb(base_addr + (CyCAR << index),
3710 (u_char) channel);
3711 if (info->rtsdtr_inv) {
3712 cy_writeb(base_addr + (CyMSVR1 << index),
3713 ~CyRTS);
3714 } else {
3715 cy_writeb(base_addr + (CyMSVR2 << index),
3716 ~CyDTR);
3717 }
3718
3719 #ifdef CY_DEBUG_DTR
3720 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3721 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3722 readb(base_addr + (CyMSVR1 << index)),
3723 readb(base_addr + (CyMSVR2 << index)));
3724 #endif
3725 spin_unlock_irqrestore(&card->card_lock, flags);
3726 }
3727 } else {
3728 base_addr = card->base_addr;
3729
3730 firm_id = card->base_addr + ID_ADDRESS;
3731 if (ISZLOADED(*card)) {
3732 zfw_ctrl = card->base_addr +
3733 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3734 board_ctrl = &zfw_ctrl->board_ctrl;
3735 ch_ctrl = zfw_ctrl->ch_ctrl;
3736
3737 if (set & TIOCM_RTS) {
3738 spin_lock_irqsave(&card->card_lock, flags);
3739 cy_writel(&ch_ctrl[channel].rs_control,
3740 readl(&ch_ctrl[channel].rs_control) |
3741 C_RS_RTS);
3742 spin_unlock_irqrestore(&card->card_lock, flags);
3743 }
3744 if (clear & TIOCM_RTS) {
3745 spin_lock_irqsave(&card->card_lock, flags);
3746 cy_writel(&ch_ctrl[channel].rs_control,
3747 readl(&ch_ctrl[channel].rs_control) &
3748 ~C_RS_RTS);
3749 spin_unlock_irqrestore(&card->card_lock, flags);
3750 }
3751 if (set & TIOCM_DTR) {
3752 spin_lock_irqsave(&card->card_lock, flags);
3753 cy_writel(&ch_ctrl[channel].rs_control,
3754 readl(&ch_ctrl[channel].rs_control) |
3755 C_RS_DTR);
3756 #ifdef CY_DEBUG_DTR
3757 printk(KERN_DEBUG "cyc:set_modem_info raising "
3758 "Z DTR\n");
3759 #endif
3760 spin_unlock_irqrestore(&card->card_lock, flags);
3761 }
3762 if (clear & TIOCM_DTR) {
3763 spin_lock_irqsave(&card->card_lock, flags);
3764 cy_writel(&ch_ctrl[channel].rs_control,
3765 readl(&ch_ctrl[channel].rs_control) &
3766 ~C_RS_DTR);
3767 #ifdef CY_DEBUG_DTR
3768 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3769 "Z DTR\n");
3770 #endif
3771 spin_unlock_irqrestore(&card->card_lock, flags);
3772 }
3773 } else {
3774 return -ENODEV;
3775 }
3776 spin_lock_irqsave(&card->card_lock, flags);
3777 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3778 if (retval != 0) {
3779 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3780 "was %x\n", info->line, retval);
3781 }
3782 spin_unlock_irqrestore(&card->card_lock, flags);
3783 }
3784 return 0;
3785 } /* cy_tiocmset */
3786
3787 /*
3788 * cy_break() --- routine which turns the break handling on or off
3789 */
3790 static void cy_break(struct tty_struct *tty, int break_state)
3791 {
3792 struct cyclades_port *info = tty->driver_data;
3793 struct cyclades_card *card;
3794 unsigned long flags;
3795
3796 if (serial_paranoia_check(info, tty->name, "cy_break"))
3797 return;
3798
3799 card = info->card;
3800
3801 spin_lock_irqsave(&card->card_lock, flags);
3802 if (!IS_CYC_Z(*card)) {
3803 /* Let the transmit ISR take care of this (since it
3804 requires stuffing characters into the output stream).
3805 */
3806 if (break_state == -1) {
3807 if (!info->breakon) {
3808 info->breakon = 1;
3809 if (!info->xmit_cnt) {
3810 spin_unlock_irqrestore(&card->card_lock, flags);
3811 start_xmit(info);
3812 spin_lock_irqsave(&card->card_lock, flags);
3813 }
3814 }
3815 } else {
3816 if (!info->breakoff) {
3817 info->breakoff = 1;
3818 if (!info->xmit_cnt) {
3819 spin_unlock_irqrestore(&card->card_lock, flags);
3820 start_xmit(info);
3821 spin_lock_irqsave(&card->card_lock, flags);
3822 }
3823 }
3824 }
3825 } else {
3826 int retval;
3827
3828 if (break_state == -1) {
3829 retval = cyz_issue_cmd(card,
3830 info->line - card->first_line,
3831 C_CM_SET_BREAK, 0L);
3832 if (retval != 0) {
3833 printk(KERN_ERR "cyc:cy_break (set) retval on "
3834 "ttyC%d was %x\n", info->line, retval);
3835 }
3836 } else {
3837 retval = cyz_issue_cmd(card,
3838 info->line - card->first_line,
3839 C_CM_CLR_BREAK, 0L);
3840 if (retval != 0) {
3841 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3842 "on ttyC%d was %x\n", info->line,
3843 retval);
3844 }
3845 }
3846 }
3847 spin_unlock_irqrestore(&card->card_lock, flags);
3848 } /* cy_break */
3849
3850 static int
3851 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3852 {
3853
3854 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3855 return -EFAULT;
3856 info->mon.int_count = 0;
3857 info->mon.char_count = 0;
3858 info->mon.char_max = 0;
3859 info->mon.char_last = 0;
3860 return 0;
3861 } /* get_mon_info */
3862
3863 static int set_threshold(struct cyclades_port *info, unsigned long value)
3864 {
3865 struct cyclades_card *card;
3866 void __iomem *base_addr;
3867 int channel, chip, index;
3868 unsigned long flags;
3869
3870 card = info->card;
3871 channel = info->line - card->first_line;
3872 if (!IS_CYC_Z(*card)) {
3873 chip = channel >> 2;
3874 channel &= 0x03;
3875 index = card->bus_index;
3876 base_addr =
3877 card->base_addr + (cy_chip_offset[chip] << index);
3878
3879 info->cor3 &= ~CyREC_FIFO;
3880 info->cor3 |= value & CyREC_FIFO;
3881
3882 spin_lock_irqsave(&card->card_lock, flags);
3883 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3884 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3885 spin_unlock_irqrestore(&card->card_lock, flags);
3886 }
3887 return 0;
3888 } /* set_threshold */
3889
3890 static int
3891 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3892 {
3893 struct cyclades_card *card;
3894 void __iomem *base_addr;
3895 int channel, chip, index;
3896 unsigned long tmp;
3897
3898 card = info->card;
3899 channel = info->line - card->first_line;
3900 if (!IS_CYC_Z(*card)) {
3901 chip = channel >> 2;
3902 channel &= 0x03;
3903 index = card->bus_index;
3904 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3905
3906 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3907 return put_user(tmp, value);
3908 }
3909 return 0;
3910 } /* get_threshold */
3911
3912 static int
3913 set_default_threshold(struct cyclades_port *info, unsigned long value)
3914 {
3915 info->default_threshold = value & 0x0f;
3916 return 0;
3917 } /* set_default_threshold */
3918
3919 static int
3920 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3921 {
3922 return put_user(info->default_threshold, value);
3923 } /* get_default_threshold */
3924
3925 static int set_timeout(struct cyclades_port *info, unsigned long value)
3926 {
3927 struct cyclades_card *card;
3928 void __iomem *base_addr;
3929 int channel, chip, index;
3930 unsigned long flags;
3931
3932 card = info->card;
3933 channel = info->line - card->first_line;
3934 if (!IS_CYC_Z(*card)) {
3935 chip = channel >> 2;
3936 channel &= 0x03;
3937 index = card->bus_index;
3938 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3939
3940 spin_lock_irqsave(&card->card_lock, flags);
3941 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3942 spin_unlock_irqrestore(&card->card_lock, flags);
3943 }
3944 return 0;
3945 } /* set_timeout */
3946
3947 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3948 {
3949 struct cyclades_card *card;
3950 void __iomem *base_addr;
3951 int channel, chip, index;
3952 unsigned long tmp;
3953
3954 card = info->card;
3955 channel = info->line - card->first_line;
3956 if (!IS_CYC_Z(*card)) {
3957 chip = channel >> 2;
3958 channel &= 0x03;
3959 index = card->bus_index;
3960 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3961
3962 tmp = readb(base_addr + (CyRTPR << index));
3963 return put_user(tmp, value);
3964 }
3965 return 0;
3966 } /* get_timeout */
3967
3968 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3969 {
3970 info->default_timeout = value & 0xff;
3971 return 0;
3972 } /* set_default_timeout */
3973
3974 static int
3975 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3976 {
3977 return put_user(info->default_timeout, value);
3978 } /* get_default_timeout */
3979
3980 /*
3981 * This routine allows the tty driver to implement device-
3982 * specific ioctl's. If the ioctl number passed in cmd is
3983 * not recognized by the driver, it should return ENOIOCTLCMD.
3984 */
3985 static int
3986 cy_ioctl(struct tty_struct *tty, struct file *file,
3987 unsigned int cmd, unsigned long arg)
3988 {
3989 struct cyclades_port *info = tty->driver_data;
3990 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3991 struct serial_icounter_struct __user *p_cuser; /* user space */
3992 int ret_val = 0;
3993 unsigned long flags;
3994 void __user *argp = (void __user *)arg;
3995
3996 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3997 return -ENODEV;
3998
3999 #ifdef CY_DEBUG_OTHER
4000 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
4001 info->line, cmd, arg);
4002 #endif
4003
4004 switch (cmd) {
4005 case CYGETMON:
4006 ret_val = get_mon_info(info, argp);
4007 break;
4008 case CYGETTHRESH:
4009 ret_val = get_threshold(info, argp);
4010 break;
4011 case CYSETTHRESH:
4012 ret_val = set_threshold(info, arg);
4013 break;
4014 case CYGETDEFTHRESH:
4015 ret_val = get_default_threshold(info, argp);
4016 break;
4017 case CYSETDEFTHRESH:
4018 ret_val = set_default_threshold(info, arg);
4019 break;
4020 case CYGETTIMEOUT:
4021 ret_val = get_timeout(info, argp);
4022 break;
4023 case CYSETTIMEOUT:
4024 ret_val = set_timeout(info, arg);
4025 break;
4026 case CYGETDEFTIMEOUT:
4027 ret_val = get_default_timeout(info, argp);
4028 break;
4029 case CYSETDEFTIMEOUT:
4030 ret_val = set_default_timeout(info, arg);
4031 break;
4032 case CYSETRFLOW:
4033 info->rflow = (int)arg;
4034 ret_val = 0;
4035 break;
4036 case CYGETRFLOW:
4037 ret_val = info->rflow;
4038 break;
4039 case CYSETRTSDTR_INV:
4040 info->rtsdtr_inv = (int)arg;
4041 ret_val = 0;
4042 break;
4043 case CYGETRTSDTR_INV:
4044 ret_val = info->rtsdtr_inv;
4045 break;
4046 case CYGETCD1400VER:
4047 ret_val = info->chip_rev;
4048 break;
4049 #ifndef CONFIG_CYZ_INTR
4050 case CYZSETPOLLCYCLE:
4051 cyz_polling_cycle = (arg * HZ) / 1000;
4052 ret_val = 0;
4053 break;
4054 case CYZGETPOLLCYCLE:
4055 ret_val = (cyz_polling_cycle * 1000) / HZ;
4056 break;
4057 #endif /* CONFIG_CYZ_INTR */
4058 case CYSETWAIT:
4059 info->closing_wait = (unsigned short)arg *HZ / 100;
4060 ret_val = 0;
4061 break;
4062 case CYGETWAIT:
4063 ret_val = info->closing_wait / (HZ / 100);
4064 break;
4065 case TIOCGSERIAL:
4066 ret_val = get_serial_info(info, argp);
4067 break;
4068 case TIOCSSERIAL:
4069 ret_val = set_serial_info(info, argp);
4070 break;
4071 case TIOCSERGETLSR: /* Get line status register */
4072 ret_val = get_lsr_info(info, argp);
4073 break;
4074 /*
4075 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4076 * - mask passed in arg for lines of interest
4077 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4078 * Caller should use TIOCGICOUNT to see which one it was
4079 */
4080 case TIOCMIWAIT:
4081 spin_lock_irqsave(&info->card->card_lock, flags);
4082 /* note the counters on entry */
4083 cnow = info->icount;
4084 spin_unlock_irqrestore(&info->card->card_lock, flags);
4085 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4086 cprev = cnow;
4087 spin_lock_irqsave(&info->card->card_lock, flags);
4088 cnow = info->icount; /* atomic copy */
4089 spin_unlock_irqrestore(&info->card->card_lock, flags);
4090
4091 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4092 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4093 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4094 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4095 }));
4096 break;
4097
4098 /*
4099 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4100 * Return: write counters to the user passed counter struct
4101 * NB: both 1->0 and 0->1 transitions are counted except for
4102 * RI where only 0->1 is counted.
4103 */
4104 case TIOCGICOUNT:
4105 spin_lock_irqsave(&info->card->card_lock, flags);
4106 cnow = info->icount;
4107 spin_unlock_irqrestore(&info->card->card_lock, flags);
4108 p_cuser = argp;
4109 ret_val = put_user(cnow.cts, &p_cuser->cts);
4110 if (ret_val)
4111 return ret_val;
4112 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4113 if (ret_val)
4114 return ret_val;
4115 ret_val = put_user(cnow.rng, &p_cuser->rng);
4116 if (ret_val)
4117 return ret_val;
4118 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4119 if (ret_val)
4120 return ret_val;
4121 ret_val = put_user(cnow.rx, &p_cuser->rx);
4122 if (ret_val)
4123 return ret_val;
4124 ret_val = put_user(cnow.tx, &p_cuser->tx);
4125 if (ret_val)
4126 return ret_val;
4127 ret_val = put_user(cnow.frame, &p_cuser->frame);
4128 if (ret_val)
4129 return ret_val;
4130 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4131 if (ret_val)
4132 return ret_val;
4133 ret_val = put_user(cnow.parity, &p_cuser->parity);
4134 if (ret_val)
4135 return ret_val;
4136 ret_val = put_user(cnow.brk, &p_cuser->brk);
4137 if (ret_val)
4138 return ret_val;
4139 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4140 if (ret_val)
4141 return ret_val;
4142 ret_val = 0;
4143 break;
4144 default:
4145 ret_val = -ENOIOCTLCMD;
4146 }
4147
4148 #ifdef CY_DEBUG_OTHER
4149 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4150 #endif
4151
4152 return ret_val;
4153 } /* cy_ioctl */
4154
4155 /*
4156 * This routine allows the tty driver to be notified when
4157 * device's termios settings have changed. Note that a
4158 * well-designed tty driver should be prepared to accept the case
4159 * where old == NULL, and try to do something rational.
4160 */
4161 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4162 {
4163 struct cyclades_port *info = tty->driver_data;
4164
4165 #ifdef CY_DEBUG_OTHER
4166 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4167 #endif
4168
4169 set_line_char(info);
4170
4171 if ((old_termios->c_cflag & CRTSCTS) &&
4172 !(tty->termios->c_cflag & CRTSCTS)) {
4173 tty->hw_stopped = 0;
4174 cy_start(tty);
4175 }
4176 #if 0
4177 /*
4178 * No need to wake up processes in open wait, since they
4179 * sample the CLOCAL flag once, and don't recheck it.
4180 * XXX It's not clear whether the current behavior is correct
4181 * or not. Hence, this may change.....
4182 */
4183 if (!(old_termios->c_cflag & CLOCAL) &&
4184 (tty->termios->c_cflag & CLOCAL))
4185 wake_up_interruptible(&info->open_wait);
4186 #endif
4187 } /* cy_set_termios */
4188
4189 /* This function is used to send a high-priority XON/XOFF character to
4190 the device.
4191 */
4192 static void cy_send_xchar(struct tty_struct *tty, char ch)
4193 {
4194 struct cyclades_port *info = tty->driver_data;
4195 struct cyclades_card *card;
4196 int channel;
4197
4198 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4199 return;
4200
4201 info->x_char = ch;
4202
4203 if (ch)
4204 cy_start(tty);
4205
4206 card = info->card;
4207 channel = info->line - card->first_line;
4208
4209 if (IS_CYC_Z(*card)) {
4210 if (ch == STOP_CHAR(tty))
4211 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4212 else if (ch == START_CHAR(tty))
4213 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4214 }
4215 }
4216
4217 /* This routine is called by the upper-layer tty layer to signal
4218 that incoming characters should be throttled because the input
4219 buffers are close to full.
4220 */
4221 static void cy_throttle(struct tty_struct *tty)
4222 {
4223 struct cyclades_port *info = tty->driver_data;
4224 struct cyclades_card *card;
4225 unsigned long flags;
4226 void __iomem *base_addr;
4227 int chip, channel, index;
4228
4229 #ifdef CY_DEBUG_THROTTLE
4230 char buf[64];
4231
4232 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4233 tty->ldisc.chars_in_buffer(tty), info->line);
4234 #endif
4235
4236 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4237 return;
4238 }
4239
4240 card = info->card;
4241
4242 if (I_IXOFF(tty)) {
4243 if (!IS_CYC_Z(*card))
4244 cy_send_xchar(tty, STOP_CHAR(tty));
4245 else
4246 info->throttle = 1;
4247 }
4248
4249 if (tty->termios->c_cflag & CRTSCTS) {
4250 channel = info->line - card->first_line;
4251 if (!IS_CYC_Z(*card)) {
4252 chip = channel >> 2;
4253 channel &= 0x03;
4254 index = card->bus_index;
4255 base_addr = card->base_addr +
4256 (cy_chip_offset[chip] << index);
4257
4258 spin_lock_irqsave(&card->card_lock, flags);
4259 cy_writeb(base_addr + (CyCAR << index),
4260 (u_char) channel);
4261 if (info->rtsdtr_inv) {
4262 cy_writeb(base_addr + (CyMSVR2 << index),
4263 ~CyDTR);
4264 } else {
4265 cy_writeb(base_addr + (CyMSVR1 << index),
4266 ~CyRTS);
4267 }
4268 spin_unlock_irqrestore(&card->card_lock, flags);
4269 } else {
4270 info->throttle = 1;
4271 }
4272 }
4273 } /* cy_throttle */
4274
4275 /*
4276 * This routine notifies the tty driver that it should signal
4277 * that characters can now be sent to the tty without fear of
4278 * overrunning the input buffers of the line disciplines.
4279 */
4280 static void cy_unthrottle(struct tty_struct *tty)
4281 {
4282 struct cyclades_port *info = tty->driver_data;
4283 struct cyclades_card *card;
4284 unsigned long flags;
4285 void __iomem *base_addr;
4286 int chip, channel, index;
4287
4288 #ifdef CY_DEBUG_THROTTLE
4289 char buf[64];
4290
4291 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4292 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
4293 #endif
4294
4295 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4296 return;
4297 }
4298
4299 if (I_IXOFF(tty)) {
4300 if (info->x_char)
4301 info->x_char = 0;
4302 else
4303 cy_send_xchar(tty, START_CHAR(tty));
4304 }
4305
4306 if (tty->termios->c_cflag & CRTSCTS) {
4307 card = info->card;
4308 channel = info->line - card->first_line;
4309 if (!IS_CYC_Z(*card)) {
4310 chip = channel >> 2;
4311 channel &= 0x03;
4312 index = card->bus_index;
4313 base_addr = card->base_addr +
4314 (cy_chip_offset[chip] << index);
4315
4316 spin_lock_irqsave(&card->card_lock, flags);
4317 cy_writeb(base_addr + (CyCAR << index),
4318 (u_char) channel);
4319 if (info->rtsdtr_inv) {
4320 cy_writeb(base_addr + (CyMSVR2 << index),
4321 CyDTR);
4322 } else {
4323 cy_writeb(base_addr + (CyMSVR1 << index),
4324 CyRTS);
4325 }
4326 spin_unlock_irqrestore(&card->card_lock, flags);
4327 } else {
4328 info->throttle = 0;
4329 }
4330 }
4331 } /* cy_unthrottle */
4332
4333 /* cy_start and cy_stop provide software output flow control as a
4334 function of XON/XOFF, software CTS, and other such stuff.
4335 */
4336 static void cy_stop(struct tty_struct *tty)
4337 {
4338 struct cyclades_card *cinfo;
4339 struct cyclades_port *info = tty->driver_data;
4340 void __iomem *base_addr;
4341 int chip, channel, index;
4342 unsigned long flags;
4343
4344 #ifdef CY_DEBUG_OTHER
4345 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4346 #endif
4347
4348 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4349 return;
4350
4351 cinfo = info->card;
4352 channel = info->line - cinfo->first_line;
4353 if (!IS_CYC_Z(*cinfo)) {
4354 index = cinfo->bus_index;
4355 chip = channel >> 2;
4356 channel &= 0x03;
4357 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4358
4359 spin_lock_irqsave(&cinfo->card_lock, flags);
4360 cy_writeb(base_addr + (CyCAR << index),
4361 (u_char)(channel & 0x0003)); /* index channel */
4362 cy_writeb(base_addr + (CySRER << index),
4363 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4364 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4365 }
4366 } /* cy_stop */
4367
4368 static void cy_start(struct tty_struct *tty)
4369 {
4370 struct cyclades_card *cinfo;
4371 struct cyclades_port *info = tty->driver_data;
4372 void __iomem *base_addr;
4373 int chip, channel, index;
4374 unsigned long flags;
4375
4376 #ifdef CY_DEBUG_OTHER
4377 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4378 #endif
4379
4380 if (serial_paranoia_check(info, tty->name, "cy_start"))
4381 return;
4382
4383 cinfo = info->card;
4384 channel = info->line - cinfo->first_line;
4385 index = cinfo->bus_index;
4386 if (!IS_CYC_Z(*cinfo)) {
4387 chip = channel >> 2;
4388 channel &= 0x03;
4389 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4390
4391 spin_lock_irqsave(&cinfo->card_lock, flags);
4392 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4393 cy_writeb(base_addr + (CySRER << index),
4394 readb(base_addr + (CySRER << index)) | CyTxRdy);
4395 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4396 }
4397 } /* cy_start */
4398
4399 static void cy_flush_buffer(struct tty_struct *tty)
4400 {
4401 struct cyclades_port *info = tty->driver_data;
4402 struct cyclades_card *card;
4403 int channel, retval;
4404 unsigned long flags;
4405
4406 #ifdef CY_DEBUG_IO
4407 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4408 #endif
4409
4410 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4411 return;
4412
4413 card = info->card;
4414 channel = info->line - card->first_line;
4415
4416 spin_lock_irqsave(&card->card_lock, flags);
4417 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4418 spin_unlock_irqrestore(&card->card_lock, flags);
4419
4420 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
4421 buffers as well */
4422 spin_lock_irqsave(&card->card_lock, flags);
4423 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4424 if (retval != 0) {
4425 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4426 "was %x\n", info->line, retval);
4427 }
4428 spin_unlock_irqrestore(&card->card_lock, flags);
4429 }
4430 tty_wakeup(tty);
4431 } /* cy_flush_buffer */
4432
4433 /*
4434 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4435 */
4436 static void cy_hangup(struct tty_struct *tty)
4437 {
4438 struct cyclades_port *info = tty->driver_data;
4439
4440 #ifdef CY_DEBUG_OTHER
4441 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4442 #endif
4443
4444 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4445 return;
4446
4447 cy_flush_buffer(tty);
4448 shutdown(info);
4449 info->event = 0;
4450 info->count = 0;
4451 #ifdef CY_DEBUG_COUNT
4452 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4453 current->pid);
4454 #endif
4455 info->tty = NULL;
4456 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4457 wake_up_interruptible(&info->open_wait);
4458 } /* cy_hangup */
4459
4460 /*
4461 * ---------------------------------------------------------------------
4462 * cy_init() and friends
4463 *
4464 * cy_init() is called at boot-time to initialize the serial driver.
4465 * ---------------------------------------------------------------------
4466 */
4467
4468 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4469 {
4470 struct cyclades_port *info;
4471 u32 mailbox;
4472 unsigned int nports;
4473 unsigned short chip_number;
4474 int index, port;
4475
4476 spin_lock_init(&cinfo->card_lock);
4477
4478 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4479 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4480 cinfo->ctl_addr)->mail_box_0);
4481 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4482 cinfo->intr_enabled = 0;
4483 cinfo->nports = 0; /* Will be correctly set later, after
4484 Z FW is loaded */
4485 } else {
4486 index = cinfo->bus_index;
4487 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4488 }
4489
4490 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4491 if (cinfo->ports == NULL) {
4492 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4493 cinfo->nports = 0;
4494 return -ENOMEM;
4495 }
4496
4497 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4498 port++) {
4499 info = &cinfo->ports[port - cinfo->first_line];
4500 info->magic = CYCLADES_MAGIC;
4501 info->card = cinfo;
4502 info->line = port;
4503 info->flags = STD_COM_FLAGS;
4504 info->closing_wait = CLOSING_WAIT_DELAY;
4505 info->close_delay = 5 * HZ / 10;
4506
4507 INIT_WORK(&info->tqueue, do_softint);
4508 init_waitqueue_head(&info->open_wait);
4509 init_waitqueue_head(&info->close_wait);
4510 init_completion(&info->shutdown_wait);
4511 init_waitqueue_head(&info->delta_msr_wait);
4512
4513 if (IS_CYC_Z(*cinfo)) {
4514 info->type = PORT_STARTECH;
4515 if (mailbox == ZO_V1)
4516 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4517 else
4518 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4519 #ifdef CONFIG_CYZ_INTR
4520 setup_timer(&cyz_rx_full_timer[port],
4521 cyz_rx_restart, (unsigned long)info);
4522 #endif
4523 } else {
4524 info->type = PORT_CIRRUS;
4525 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4526 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4527 info->cor2 = CyETC;
4528 info->cor3 = 0x08; /* _very_ small rcv threshold */
4529
4530 chip_number = (port - cinfo->first_line) / 4;
4531 if ((info->chip_rev = readb(cinfo->base_addr +
4532 (cy_chip_offset[chip_number] <<
4533 index) + (CyGFRCR << index))) >=
4534 CD1400_REV_J) {
4535 /* It is a CD1400 rev. J or later */
4536 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4537 info->tco = baud_co_60[13]; /* Tx CO */
4538 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4539 info->rco = baud_co_60[13]; /* Rx CO */
4540 info->rtsdtr_inv = 1;
4541 } else {
4542 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4543 info->tco = baud_co_25[13]; /* Tx CO */
4544 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4545 info->rco = baud_co_25[13]; /* Rx CO */
4546 info->rtsdtr_inv = 0;
4547 }
4548 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4549 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4550 }
4551
4552 }
4553
4554 #ifndef CONFIG_CYZ_INTR
4555 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4556 mod_timer(&cyz_timerlist, jiffies + 1);
4557 #ifdef CY_PCI_DEBUG
4558 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4559 #endif
4560 }
4561 #endif
4562 return 0;
4563 }
4564
4565 /* initialize chips on Cyclom-Y card -- return number of valid
4566 chips (which is number of ports/4) */
4567 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4568 int index)
4569 {
4570 unsigned int chip_number;
4571 void __iomem *base_addr;
4572
4573 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4574 /* Cy_HwReset is 0x1400 */
4575 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4576 /* Cy_ClrIntr is 0x1800 */
4577 udelay(500L);
4578
4579 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4580 base_addr =
4581 true_base_addr + (cy_chip_offset[chip_number] << index);
4582 mdelay(1);
4583 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4584 /*************
4585 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4586 chip_number, (unsigned long)base_addr);
4587 *************/
4588 return chip_number;
4589 }
4590
4591 cy_writeb(base_addr + (CyGFRCR << index), 0);
4592 udelay(10L);
4593
4594 /* The Cyclom-16Y does not decode address bit 9 and therefore
4595 cannot distinguish between references to chip 0 and a non-
4596 existent chip 4. If the preceding clearing of the supposed
4597 chip 4 GFRCR register appears at chip 0, there is no chip 4
4598 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4599 */
4600 if (chip_number == 4 && readb(true_base_addr +
4601 (cy_chip_offset[0] << index) +
4602 (CyGFRCR << index)) == 0) {
4603 return chip_number;
4604 }
4605
4606 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4607 mdelay(1);
4608
4609 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4610 /*
4611 printk(" chip #%d at %#6lx is not responding ",
4612 chip_number, (unsigned long)base_addr);
4613 printk("(GFRCR stayed 0)\n",
4614 */
4615 return chip_number;
4616 }
4617 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4618 0x40) {
4619 /*
4620 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4621 "%#2x)\n",
4622 chip_number, (unsigned long)base_addr,
4623 base_addr[CyGFRCR<<index]);
4624 */
4625 return chip_number;
4626 }
4627 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4628 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4629 /* It is a CD1400 rev. J or later */
4630 /* Impossible to reach 5ms with this chip.
4631 Changed to 2ms instead (f = 500 Hz). */
4632 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4633 } else {
4634 /* f = 200 Hz */
4635 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4636 }
4637
4638 /*
4639 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4640 chip_number, (unsigned long)base_addr,
4641 readb(base_addr+(CyGFRCR<<index)));
4642 */
4643 }
4644 return chip_number;
4645 } /* cyy_init_card */
4646
4647 /*
4648 * ---------------------------------------------------------------------
4649 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4650 * sets global variables and return the number of ISA boards found.
4651 * ---------------------------------------------------------------------
4652 */
4653 static int __init cy_detect_isa(void)
4654 {
4655 #ifdef CONFIG_ISA
4656 unsigned short cy_isa_irq, nboard;
4657 void __iomem *cy_isa_address;
4658 unsigned short i, j, cy_isa_nchan;
4659 #ifdef MODULE
4660 int isparam = 0;
4661 #endif
4662
4663 nboard = 0;
4664
4665 #ifdef MODULE
4666 /* Check for module parameters */
4667 for (i = 0; i < NR_CARDS; i++) {
4668 if (maddr[i] || i) {
4669 isparam = 1;
4670 cy_isa_addresses[i] = maddr[i];
4671 }
4672 if (!maddr[i])
4673 break;
4674 }
4675 #endif
4676
4677 /* scan the address table probing for Cyclom-Y/ISA boards */
4678 for (i = 0; i < NR_ISA_ADDRS; i++) {
4679 unsigned int isa_address = cy_isa_addresses[i];
4680 if (isa_address == 0x0000) {
4681 return nboard;
4682 }
4683
4684 /* probe for CD1400... */
4685 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4686 if (cy_isa_address == NULL) {
4687 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4688 "address\n");
4689 continue;
4690 }
4691 cy_isa_nchan = CyPORTS_PER_CHIP *
4692 cyy_init_card(cy_isa_address, 0);
4693 if (cy_isa_nchan == 0) {
4694 iounmap(cy_isa_address);
4695 continue;
4696 }
4697 #ifdef MODULE
4698 if (isparam && irq[i])
4699 cy_isa_irq = irq[i];
4700 else
4701 #endif
4702 /* find out the board's irq by probing */
4703 cy_isa_irq = detect_isa_irq(cy_isa_address);
4704 if (cy_isa_irq == 0) {
4705 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4706 "IRQ could not be detected.\n",
4707 (unsigned long)cy_isa_address);
4708 iounmap(cy_isa_address);
4709 continue;
4710 }
4711
4712 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4713 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4714 "more channels are available. Change NR_PORTS "
4715 "in cyclades.c and recompile kernel.\n",
4716 (unsigned long)cy_isa_address);
4717 iounmap(cy_isa_address);
4718 return nboard;
4719 }
4720 /* fill the next cy_card structure available */
4721 for (j = 0; j < NR_CARDS; j++) {
4722 if (cy_card[j].base_addr == NULL)
4723 break;
4724 }
4725 if (j == NR_CARDS) { /* no more cy_cards available */
4726 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4727 "more cards can be used. Change NR_CARDS in "
4728 "cyclades.c and recompile kernel.\n",
4729 (unsigned long)cy_isa_address);
4730 iounmap(cy_isa_address);
4731 return nboard;
4732 }
4733
4734 /* allocate IRQ */
4735 if (request_irq(cy_isa_irq, cyy_interrupt,
4736 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4737 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4738 "could not allocate IRQ#%d.\n",
4739 (unsigned long)cy_isa_address, cy_isa_irq);
4740 iounmap(cy_isa_address);
4741 return nboard;
4742 }
4743
4744 /* set cy_card */
4745 cy_card[j].base_addr = cy_isa_address;
4746 cy_card[j].ctl_addr = NULL;
4747 cy_card[j].irq = (int)cy_isa_irq;
4748 cy_card[j].bus_index = 0;
4749 cy_card[j].first_line = cy_next_channel;
4750 cy_card[j].num_chips = cy_isa_nchan / 4;
4751 if (cy_init_card(&cy_card[j])) {
4752 cy_card[j].base_addr = NULL;
4753 free_irq(cy_isa_irq, &cy_card[j]);
4754 iounmap(cy_isa_address);
4755 continue;
4756 }
4757 nboard++;
4758
4759 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4760 "%d channels starting from port %d\n",
4761 j + 1, (unsigned long)cy_isa_address,
4762 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4763 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4764
4765 for (j = cy_next_channel;
4766 j < cy_next_channel + cy_isa_nchan; j++)
4767 tty_register_device(cy_serial_driver, j, NULL);
4768 cy_next_channel += cy_isa_nchan;
4769 }
4770 return nboard;
4771 #else
4772 return 0;
4773 #endif /* CONFIG_ISA */
4774 } /* cy_detect_isa */
4775
4776 #ifdef CONFIG_PCI
4777 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4778 {
4779 unsigned int a;
4780
4781 for (a = 0; a < size && *str; a++, str++)
4782 if (*str & 0x80)
4783 return -EINVAL;
4784
4785 for (; a < size; a++, str++)
4786 if (*str)
4787 return -EINVAL;
4788
4789 return 0;
4790 }
4791
4792 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, u8 *data,
4793 unsigned int size)
4794 {
4795 for (; size > 0; size--) {
4796 cy_writel(fpga, *data++);
4797 udelay(10);
4798 }
4799 }
4800
4801 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4802 struct RUNTIME_9060 __iomem *addr)
4803 {
4804 /* Reset PLX */
4805 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4806 udelay(100L);
4807 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4808
4809 /* Reload Config. Registers from EEPROM */
4810 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4811 udelay(100L);
4812 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4813
4814 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4815 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4816 * registers. This will remain here until we find a permanent fix.
4817 */
4818 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4819 }
4820
4821 static int __devinit __cyz_load_fw(const struct firmware *fw,
4822 const char *name, const u32 mailbox, void __iomem *base,
4823 void __iomem *fpga)
4824 {
4825 void *ptr = fw->data;
4826 struct zfile_header *h = ptr;
4827 struct zfile_config *c, *cs;
4828 struct zfile_block *b, *bs;
4829 unsigned int a, tmp, len = fw->size;
4830 #define BAD_FW KERN_ERR "Bad firmware: "
4831 if (len < sizeof(*h)) {
4832 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4833 return -EINVAL;
4834 }
4835
4836 cs = ptr + h->config_offset;
4837 bs = ptr + h->block_offset;
4838
4839 if ((void *)(cs + h->n_config) > ptr + len ||
4840 (void *)(bs + h->n_blocks) > ptr + len) {
4841 printk(BAD_FW "too short");
4842 return -EINVAL;
4843 }
4844
4845 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4846 cyc_isfwstr(h->date, sizeof(h->date))) {
4847 printk(BAD_FW "bad formatted header string\n");
4848 return -EINVAL;
4849 }
4850
4851 if (strncmp(name, h->name, sizeof(h->name))) {
4852 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4853 return -EINVAL;
4854 }
4855
4856 tmp = 0;
4857 for (c = cs; c < cs + h->n_config; c++) {
4858 for (a = 0; a < c->n_blocks; a++)
4859 if (c->block_list[a] > h->n_blocks) {
4860 printk(BAD_FW "bad block ref number in cfgs\n");
4861 return -EINVAL;
4862 }
4863 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4864 tmp++;
4865 }
4866 if (!tmp) {
4867 printk(BAD_FW "nothing appropriate\n");
4868 return -EINVAL;
4869 }
4870
4871 for (b = bs; b < bs + h->n_blocks; b++)
4872 if (b->file_offset + b->size > len) {
4873 printk(BAD_FW "bad block data offset\n");
4874 return -EINVAL;
4875 }
4876
4877 /* everything is OK, let's seek'n'load it */
4878 for (c = cs; c < cs + h->n_config; c++)
4879 if (c->mailbox == mailbox && c->function == 0)
4880 break;
4881
4882 for (a = 0; a < c->n_blocks; a++) {
4883 b = &bs[c->block_list[a]];
4884 if (b->type == ZBLOCK_FPGA) {
4885 if (fpga != NULL)
4886 cyz_fpga_copy(fpga, ptr + b->file_offset,
4887 b->size);
4888 } else {
4889 if (base != NULL)
4890 memcpy_toio(base + b->ram_offset,
4891 ptr + b->file_offset, b->size);
4892 }
4893 }
4894 #undef BAD_FW
4895 return 0;
4896 }
4897
4898 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4899 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4900 {
4901 const struct firmware *fw;
4902 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4903 struct CUSTOM_REG __iomem *cust = base_addr;
4904 struct ZFW_CTRL __iomem *pt_zfwctrl;
4905 u8 *tmp;
4906 u32 mailbox, status;
4907 unsigned int i;
4908 int retval;
4909
4910 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4911 if (retval) {
4912 dev_err(&pdev->dev, "can't get firmware\n");
4913 goto err;
4914 }
4915
4916 /* Check whether the firmware is already loaded and running. If
4917 positive, skip this board */
4918 if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4919 u32 cntval = readl(base_addr + 0x190);
4920
4921 udelay(100);
4922 if (cntval != readl(base_addr + 0x190)) {
4923 /* FW counter is working, FW is running */
4924 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4925 "Skipping board.\n");
4926 retval = 0;
4927 goto err_rel;
4928 }
4929 }
4930
4931 /* start boot */
4932 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4933 ~0x00030800UL);
4934
4935 mailbox = readl(&ctl_addr->mail_box_0);
4936
4937 if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4938 /* stops CPU and set window to beginning of RAM */
4939 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4940 cy_writel(&cust->cpu_stop, 0);
4941 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4942 udelay(100);
4943 }
4944
4945 plx_init(pdev, irq, ctl_addr);
4946
4947 if (mailbox != 0) {
4948 /* load FPGA */
4949 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4950 base_addr);
4951 if (retval)
4952 goto err_rel;
4953 if (!Z_FPGA_LOADED(ctl_addr)) {
4954 dev_err(&pdev->dev, "fw upload successful, but fw is "
4955 "not loaded\n");
4956 goto err_rel;
4957 }
4958 }
4959
4960 /* stops CPU and set window to beginning of RAM */
4961 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4962 cy_writel(&cust->cpu_stop, 0);
4963 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4964 udelay(100);
4965
4966 /* clear memory */
4967 for (tmp = base_addr; (void *)tmp < base_addr + RAM_SIZE; tmp++)
4968 cy_writeb(tmp, 255);
4969 if (mailbox != 0) {
4970 /* set window to last 512K of RAM */
4971 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4972 //sleep(1);
4973 for (tmp = base_addr; (void *)tmp < base_addr + RAM_SIZE; tmp++)
4974 cy_writeb(tmp, 255);
4975 /* set window to beginning of RAM */
4976 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4977 //sleep(1);
4978 }
4979
4980 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4981 release_firmware(fw);
4982 if (retval)
4983 goto err;
4984
4985 /* finish boot and start boards */
4986 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4987 cy_writel(&cust->cpu_start, 0);
4988 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4989 i = 0;
4990 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4991 msleep(100);
4992 if (status != ZFIRM_ID) {
4993 if (status == ZFIRM_HLT) {
4994 dev_err(&pdev->dev, "you need an external power supply "
4995 "for this number of ports. Firmware halted and "
4996 "board reset.\n");
4997 retval = -EIO;
4998 goto err;
4999 }
5000 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
5001 "some more time\n", status);
5002 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
5003 i++ < 200)
5004 msleep(100);
5005 if (status != ZFIRM_ID) {
5006 dev_err(&pdev->dev, "Board not started in 20 seconds! "
5007 "Giving up. (fid->signature = 0x%x)\n",
5008 status);
5009 dev_info(&pdev->dev, "*** Warning ***: if you are "
5010 "upgrading the FW, please power cycle the "
5011 "system before loading the new FW to the "
5012 "Cyclades-Z.\n");
5013
5014 if (Z_FPGA_LOADED(ctl_addr))
5015 plx_init(pdev, irq, ctl_addr);
5016
5017 retval = -EIO;
5018 goto err;
5019 }
5020 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
5021 i / 10);
5022 }
5023 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
5024
5025 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
5026 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
5027 base_addr + readl(&fid->zfwctrl_addr));
5028
5029 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
5030 readl(&pt_zfwctrl->board_ctrl.fw_version),
5031 readl(&pt_zfwctrl->board_ctrl.n_channel));
5032
5033 if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
5034 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
5035 "check the connection between the Z host card and the "
5036 "serial expanders.\n");
5037
5038 if (Z_FPGA_LOADED(ctl_addr))
5039 plx_init(pdev, irq, ctl_addr);
5040
5041 dev_info(&pdev->dev, "Null number of ports detected. Board "
5042 "reset.\n");
5043 retval = 0;
5044 goto err;
5045 }
5046
5047 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
5048 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
5049
5050 /*
5051 Early firmware failed to start looking for commands.
5052 This enables firmware interrupts for those commands.
5053 */
5054 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
5055 (1 << 17));
5056 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
5057 0x00030800UL);
5058
5059 plx_init(pdev, irq, ctl_addr);
5060
5061 return 0;
5062 err_rel:
5063 release_firmware(fw);
5064 err:
5065 return retval;
5066 }
5067
5068 static int __devinit cy_pci_probe(struct pci_dev *pdev,
5069 const struct pci_device_id *ent)
5070 {
5071 void __iomem *addr0 = NULL, *addr2 = NULL;
5072 char *card_name = NULL;
5073 u32 mailbox;
5074 unsigned int device_id, nchan = 0, card_no, i;
5075 unsigned char plx_ver;
5076 int retval, irq;
5077
5078 retval = pci_enable_device(pdev);
5079 if (retval) {
5080 dev_err(&pdev->dev, "cannot enable device\n");
5081 goto err;
5082 }
5083
5084 /* read PCI configuration area */
5085 irq = pdev->irq;
5086 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
5087
5088 #if defined(__alpha__)
5089 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
5090 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
5091 "addresses on Alpha systems.\n");
5092 retval = -EIO;
5093 goto err_dis;
5094 }
5095 #endif
5096 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
5097 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
5098 "addresses\n");
5099 retval = -EIO;
5100 goto err_dis;
5101 }
5102
5103 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
5104 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
5105 "it...\n");
5106 pdev->resource[2].flags &= ~IORESOURCE_IO;
5107 }
5108
5109 retval = pci_request_regions(pdev, "cyclades");
5110 if (retval) {
5111 dev_err(&pdev->dev, "failed to reserve resources\n");
5112 goto err_dis;
5113 }
5114
5115 retval = -EIO;
5116 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5117 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5118 card_name = "Cyclom-Y";
5119
5120 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
5121 if (addr0 == NULL) {
5122 dev_err(&pdev->dev, "can't remap ctl region\n");
5123 goto err_reg;
5124 }
5125 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
5126 if (addr2 == NULL) {
5127 dev_err(&pdev->dev, "can't remap base region\n");
5128 goto err_unmap;
5129 }
5130
5131 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5132 if (nchan == 0) {
5133 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5134 "Serial-Modules\n");
5135 return -EIO;
5136 }
5137 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5138 struct RUNTIME_9060 __iomem *ctl_addr;
5139
5140 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5141 if (addr0 == NULL) {
5142 dev_err(&pdev->dev, "can't remap ctl region\n");
5143 goto err_reg;
5144 }
5145
5146 /* Disable interrupts on the PLX before resetting it */
5147 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
5148
5149 plx_init(pdev, irq, addr0);
5150
5151 mailbox = (u32)readl(&ctl_addr->mail_box_0);
5152
5153 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
5154 CyPCI_Ze_win : CyPCI_Zwin);
5155 if (addr2 == NULL) {
5156 dev_err(&pdev->dev, "can't remap base region\n");
5157 goto err_unmap;
5158 }
5159
5160 if (mailbox == ZE_V1) {
5161 card_name = "Cyclades-Ze";
5162
5163 readl(&ctl_addr->mail_box_0);
5164 nchan = ZE_V1_NPORTS;
5165 } else {
5166 card_name = "Cyclades-8Zo";
5167
5168 #ifdef CY_PCI_DEBUG
5169 if (mailbox == ZO_V1) {
5170 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5171 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5172 "id %lx, ver %lx\n", (ulong)(0xff &
5173 readl(&((struct CUSTOM_REG *)addr2)->
5174 fpga_id)), (ulong)(0xff &
5175 readl(&((struct CUSTOM_REG *)addr2)->
5176 fpga_version)));
5177 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5178 } else {
5179 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5180 "Cyclades-Z board. FPGA not loaded\n");
5181 }
5182 #endif
5183 /* The following clears the firmware id word. This
5184 ensures that the driver will not attempt to talk to
5185 the board until it has been properly initialized.
5186 */
5187 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5188 cy_writel(addr2 + ID_ADDRESS, 0L);
5189
5190 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5191 if (retval)
5192 goto err_unmap;
5193 /* This must be a Cyclades-8Zo/PCI. The extendable
5194 version will have a different device_id and will
5195 be allocated its maximum number of ports. */
5196 nchan = 8;
5197 }
5198 }
5199
5200 if ((cy_next_channel + nchan) > NR_PORTS) {
5201 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5202 "channels are available. Change NR_PORTS in "
5203 "cyclades.c and recompile kernel.\n");
5204 goto err_unmap;
5205 }
5206 /* fill the next cy_card structure available */
5207 for (card_no = 0; card_no < NR_CARDS; card_no++) {
5208 if (cy_card[card_no].base_addr == NULL)
5209 break;
5210 }
5211 if (card_no == NR_CARDS) { /* no more cy_cards available */
5212 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5213 "more cards can be used. Change NR_CARDS in "
5214 "cyclades.c and recompile kernel.\n");
5215 goto err_unmap;
5216 }
5217
5218 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5219 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5220 /* allocate IRQ */
5221 retval = request_irq(irq, cyy_interrupt,
5222 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5223 if (retval) {
5224 dev_err(&pdev->dev, "could not allocate IRQ\n");
5225 goto err_unmap;
5226 }
5227 cy_card[card_no].num_chips = nchan / 4;
5228 } else {
5229 #ifdef CONFIG_CYZ_INTR
5230 /* allocate IRQ only if board has an IRQ */
5231 if (irq != 0 && irq != 255) {
5232 retval = request_irq(irq, cyz_interrupt,
5233 IRQF_SHARED, "Cyclades-Z",
5234 &cy_card[card_no]);
5235 if (retval) {
5236 dev_err(&pdev->dev, "could not allocate IRQ\n");
5237 goto err_unmap;
5238 }
5239 }
5240 #endif /* CONFIG_CYZ_INTR */
5241 cy_card[card_no].num_chips = -1;
5242 }
5243
5244 /* set cy_card */
5245 cy_card[card_no].base_addr = addr2;
5246 cy_card[card_no].ctl_addr = addr0;
5247 cy_card[card_no].irq = irq;
5248 cy_card[card_no].bus_index = 1;
5249 cy_card[card_no].first_line = cy_next_channel;
5250 retval = cy_init_card(&cy_card[card_no]);
5251 if (retval)
5252 goto err_null;
5253
5254 pci_set_drvdata(pdev, &cy_card[card_no]);
5255
5256 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5257 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5258 /* enable interrupts in the PCI interface */
5259 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5260 switch (plx_ver) {
5261 case PLX_9050:
5262
5263 cy_writeb(addr0 + 0x4c, 0x43);
5264 break;
5265
5266 case PLX_9060:
5267 case PLX_9080:
5268 default: /* Old boards, use PLX_9060 */
5269 plx_init(pdev, irq, addr0);
5270 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
5271 break;
5272 }
5273 }
5274
5275 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5276 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5277 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5278 tty_register_device(cy_serial_driver, i, &pdev->dev);
5279 cy_next_channel += nchan;
5280
5281 return 0;
5282 err_null:
5283 cy_card[card_no].base_addr = NULL;
5284 free_irq(irq, &cy_card[card_no]);
5285 err_unmap:
5286 pci_iounmap(pdev, addr0);
5287 if (addr2)
5288 pci_iounmap(pdev, addr2);
5289 err_reg:
5290 pci_release_regions(pdev);
5291 err_dis:
5292 pci_disable_device(pdev);
5293 err:
5294 return retval;
5295 }
5296
5297 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5298 {
5299 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5300 unsigned int i;
5301
5302 /* non-Z with old PLX */
5303 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5304 PLX_9050)
5305 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5306 else
5307 #ifndef CONFIG_CYZ_INTR
5308 if (!IS_CYC_Z(*cinfo))
5309 #endif
5310 cy_writew(cinfo->ctl_addr + 0x68,
5311 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5312
5313 pci_iounmap(pdev, cinfo->base_addr);
5314 if (cinfo->ctl_addr)
5315 pci_iounmap(pdev, cinfo->ctl_addr);
5316 if (cinfo->irq
5317 #ifndef CONFIG_CYZ_INTR
5318 && !IS_CYC_Z(*cinfo)
5319 #endif /* CONFIG_CYZ_INTR */
5320 )
5321 free_irq(cinfo->irq, cinfo);
5322 pci_release_regions(pdev);
5323
5324 cinfo->base_addr = NULL;
5325 for (i = cinfo->first_line; i < cinfo->first_line +
5326 cinfo->nports; i++)
5327 tty_unregister_device(cy_serial_driver, i);
5328 cinfo->nports = 0;
5329 kfree(cinfo->ports);
5330 }
5331
5332 static struct pci_driver cy_pci_driver = {
5333 .name = "cyclades",
5334 .id_table = cy_pci_dev_id,
5335 .probe = cy_pci_probe,
5336 .remove = __devexit_p(cy_pci_remove)
5337 };
5338 #endif
5339
5340 static int
5341 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5342 int *eof, void *data)
5343 {
5344 struct cyclades_port *info;
5345 unsigned int i, j;
5346 int len = 0;
5347 off_t begin = 0;
5348 off_t pos = 0;
5349 int size;
5350 __u32 cur_jifs = jiffies;
5351
5352 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5353 "IdleIn Overruns Ldisc\n");
5354
5355 pos += size;
5356 len += size;
5357
5358 /* Output one line for each known port */
5359 for (i = 0; i < NR_CARDS; i++)
5360 for (j = 0; j < cy_card[i].nports; j++) {
5361 info = &cy_card[i].ports[j];
5362
5363 if (info->count)
5364 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5365 "%10lu %8lu %9lu %6ld\n", info->line,
5366 (cur_jifs - info->idle_stats.in_use) /
5367 HZ, info->idle_stats.xmit_bytes,
5368 (cur_jifs - info->idle_stats.xmit_idle)/
5369 HZ, info->idle_stats.recv_bytes,
5370 (cur_jifs - info->idle_stats.recv_idle)/
5371 HZ, info->idle_stats.overruns,
5372 (long)info->tty->ldisc.num);
5373 else
5374 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5375 "%10lu %8lu %9lu %6ld\n",
5376 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5377 len += size;
5378 pos = begin + len;
5379
5380 if (pos < offset) {
5381 len = 0;
5382 begin = pos;
5383 }
5384 if (pos > offset + length)
5385 goto done;
5386 }
5387 *eof = 1;
5388 done:
5389 *start = buf + (offset - begin); /* Start of wanted data */
5390 len -= (offset - begin); /* Start slop */
5391 if (len > length)
5392 len = length; /* Ending slop */
5393 if (len < 0)
5394 len = 0;
5395 return len;
5396 }
5397
5398 /* The serial driver boot-time initialization code!
5399 Hardware I/O ports are mapped to character special devices on a
5400 first found, first allocated manner. That is, this code searches
5401 for Cyclom cards in the system. As each is found, it is probed
5402 to discover how many chips (and thus how many ports) are present.
5403 These ports are mapped to the tty ports 32 and upward in monotonic
5404 fashion. If an 8-port card is replaced with a 16-port card, the
5405 port mapping on a following card will shift.
5406
5407 This approach is different from what is used in the other serial
5408 device driver because the Cyclom is more properly a multiplexer,
5409 not just an aggregation of serial ports on one card.
5410
5411 If there are more cards with more ports than have been
5412 statically allocated above, a warning is printed and the
5413 extra ports are ignored.
5414 */
5415
5416 static const struct tty_operations cy_ops = {
5417 .open = cy_open,
5418 .close = cy_close,
5419 .write = cy_write,
5420 .put_char = cy_put_char,
5421 .flush_chars = cy_flush_chars,
5422 .write_room = cy_write_room,
5423 .chars_in_buffer = cy_chars_in_buffer,
5424 .flush_buffer = cy_flush_buffer,
5425 .ioctl = cy_ioctl,
5426 .throttle = cy_throttle,
5427 .unthrottle = cy_unthrottle,
5428 .set_termios = cy_set_termios,
5429 .stop = cy_stop,
5430 .start = cy_start,
5431 .hangup = cy_hangup,
5432 .break_ctl = cy_break,
5433 .wait_until_sent = cy_wait_until_sent,
5434 .read_proc = cyclades_get_proc_info,
5435 .tiocmget = cy_tiocmget,
5436 .tiocmset = cy_tiocmset,
5437 };
5438
5439 static int __init cy_init(void)
5440 {
5441 unsigned int nboards;
5442 int retval = -ENOMEM;
5443
5444 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5445 if (!cy_serial_driver)
5446 goto err;
5447
5448 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5449 __DATE__, __TIME__);
5450
5451 /* Initialize the tty_driver structure */
5452
5453 cy_serial_driver->owner = THIS_MODULE;
5454 cy_serial_driver->driver_name = "cyclades";
5455 cy_serial_driver->name = "ttyC";
5456 cy_serial_driver->major = CYCLADES_MAJOR;
5457 cy_serial_driver->minor_start = 0;
5458 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5459 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5460 cy_serial_driver->init_termios = tty_std_termios;
5461 cy_serial_driver->init_termios.c_cflag =
5462 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5463 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5464 tty_set_operations(cy_serial_driver, &cy_ops);
5465
5466 retval = tty_register_driver(cy_serial_driver);
5467 if (retval) {
5468 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5469 goto err_frtty;
5470 }
5471
5472 /* the code below is responsible to find the boards. Each different
5473 type of board has its own detection routine. If a board is found,
5474 the next cy_card structure available is set by the detection
5475 routine. These functions are responsible for checking the
5476 availability of cy_card and cy_port data structures and updating
5477 the cy_next_channel. */
5478
5479 /* look for isa boards */
5480 nboards = cy_detect_isa();
5481
5482 #ifdef CONFIG_PCI
5483 /* look for pci boards */
5484 retval = pci_register_driver(&cy_pci_driver);
5485 if (retval && !nboards)
5486 goto err_unr;
5487 #endif
5488
5489 return 0;
5490 err_unr:
5491 tty_unregister_driver(cy_serial_driver);
5492 err_frtty:
5493 put_tty_driver(cy_serial_driver);
5494 err:
5495 return retval;
5496 } /* cy_init */
5497
5498 static void __exit cy_cleanup_module(void)
5499 {
5500 struct cyclades_card *card;
5501 int i, e1;
5502
5503 #ifndef CONFIG_CYZ_INTR
5504 del_timer_sync(&cyz_timerlist);
5505 #endif /* CONFIG_CYZ_INTR */
5506
5507 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5508 printk(KERN_ERR "failed to unregister Cyclades serial "
5509 "driver(%d)\n", e1);
5510
5511 #ifdef CONFIG_PCI
5512 pci_unregister_driver(&cy_pci_driver);
5513 #endif
5514
5515 for (i = 0; i < NR_CARDS; i++) {
5516 card = &cy_card[i];
5517 if (card->base_addr) {
5518 /* clear interrupt */
5519 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5520 iounmap(card->base_addr);
5521 if (card->ctl_addr)
5522 iounmap(card->ctl_addr);
5523 if (card->irq
5524 #ifndef CONFIG_CYZ_INTR
5525 && !IS_CYC_Z(*card)
5526 #endif /* CONFIG_CYZ_INTR */
5527 )
5528 free_irq(card->irq, card);
5529 for (e1 = card->first_line;
5530 e1 < card->first_line +
5531 card->nports; e1++)
5532 tty_unregister_device(cy_serial_driver, e1);
5533 kfree(card->ports);
5534 }
5535 }
5536
5537 put_tty_driver(cy_serial_driver);
5538 } /* cy_cleanup_module */
5539
5540 module_init(cy_init);
5541 module_exit(cy_cleanup_module);
5542
5543 MODULE_LICENSE("GPL");
5544 MODULE_VERSION(CY_VERSION);
Linux kernel - Deliverables
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