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Char: cyclades, fix sparse warning
[linux-2.6/mini2440.git] / drivers / char / cyclades.c
blob7b0839426e189a05dd179c27f3cb090113f95d2e
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 struct FIRM_ID __iomem *firm_id;
1894 struct ZFW_CTRL __iomem *zfw_ctrl;
1895 struct BOARD_CTRL __iomem *board_ctrl;
1896 struct CH_CTRL __iomem *ch_ctrl;
1897 struct BUF_CTRL __iomem *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
2042 base_addr = card->base_addr;
2043
2044 firm_id = base_addr + ID_ADDRESS;
2045 if (!ISZLOADED(*card)) {
2046 return -ENODEV;
2047 }
2048
2049 zfw_ctrl = card->base_addr +
2050 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2051 board_ctrl = &zfw_ctrl->board_ctrl;
2052 ch_ctrl = zfw_ctrl->ch_ctrl;
2053
2054 #ifdef CY_DEBUG_OPEN
2055 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
2056 "base_addr %p\n", card, channel, base_addr);
2057 #endif
2058 spin_lock_irqsave(&card->card_lock, flags);
2059
2060 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2061 #ifdef Z_WAKE
2062 #ifdef CONFIG_CYZ_INTR
2063 cy_writel(&ch_ctrl[channel].intr_enable,
2064 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2065 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2066 #else
2067 cy_writel(&ch_ctrl[channel].intr_enable,
2068 C_IN_IOCTLW | C_IN_MDCD);
2069 #endif /* CONFIG_CYZ_INTR */
2070 #else
2071 #ifdef CONFIG_CYZ_INTR
2072 cy_writel(&ch_ctrl[channel].intr_enable,
2073 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2074 C_IN_RXNNDT | C_IN_MDCD);
2075 #else
2076 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2077 #endif /* CONFIG_CYZ_INTR */
2078 #endif /* Z_WAKE */
2079
2080 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2081 if (retval != 0) {
2082 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
2083 "%x\n", info->line, retval);
2084 }
2085
2086 /* Flush RX buffers before raising DTR and RTS */
2087 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
2088 if (retval != 0) {
2089 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
2090 "%x\n", info->line, retval);
2091 }
2092
2093 /* set timeout !!! */
2094 /* set RTS and DTR !!! */
2095 cy_writel(&ch_ctrl[channel].rs_control,
2096 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2097 C_RS_DTR);
2098 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2099 if (retval != 0) {
2100 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
2101 "%x\n", info->line, retval);
2102 }
2103 #ifdef CY_DEBUG_DTR
2104 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
2105 #endif
2106
2107 /* enable send, recv, modem !!! */
2108
2109 info->flags |= ASYNC_INITIALIZED;
2110 if (info->tty) {
2111 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2112 }
2113 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2114 info->breakon = info->breakoff = 0;
2115 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2116 info->idle_stats.in_use =
2117 info->idle_stats.recv_idle =
2118 info->idle_stats.xmit_idle = jiffies;
2119
2120 spin_unlock_irqrestore(&card->card_lock, flags);
2121 }
2122
2123 #ifdef CY_DEBUG_OPEN
2124 printk(KERN_DEBUG "cyc startup done\n");
2125 #endif
2126 return 0;
2127
2128 errout:
2129 spin_unlock_irqrestore(&card->card_lock, flags);
2130 return retval;
2131 } /* startup */
2132
2133 static void start_xmit(struct cyclades_port *info)
2134 {
2135 struct cyclades_card *card;
2136 unsigned long flags;
2137 void __iomem *base_addr;
2138 int chip, channel, index;
2139
2140 card = info->card;
2141 channel = info->line - card->first_line;
2142 if (!IS_CYC_Z(*card)) {
2143 chip = channel >> 2;
2144 channel &= 0x03;
2145 index = card->bus_index;
2146 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2147
2148 spin_lock_irqsave(&card->card_lock, flags);
2149 cy_writeb(base_addr + (CyCAR << index), channel);
2150 cy_writeb(base_addr + (CySRER << index),
2151 readb(base_addr + (CySRER << index)) | CyTxRdy);
2152 spin_unlock_irqrestore(&card->card_lock, flags);
2153 } else {
2154 #ifdef CONFIG_CYZ_INTR
2155 int retval;
2156
2157 spin_lock_irqsave(&card->card_lock, flags);
2158 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2159 if (retval != 0) {
2160 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2161 "%x\n", info->line, retval);
2162 }
2163 spin_unlock_irqrestore(&card->card_lock, flags);
2164 #else /* CONFIG_CYZ_INTR */
2165 /* Don't have to do anything at this time */
2166 #endif /* CONFIG_CYZ_INTR */
2167 }
2168 } /* start_xmit */
2169
2170 /*
2171 * This routine shuts down a serial port; interrupts are disabled,
2172 * and DTR is dropped if the hangup on close termio flag is on.
2173 */
2174 static void shutdown(struct cyclades_port *info)
2175 {
2176 struct cyclades_card *card;
2177 unsigned long flags;
2178 void __iomem *base_addr;
2179 int chip, channel, index;
2180
2181 if (!(info->flags & ASYNC_INITIALIZED)) {
2182 return;
2183 }
2184
2185 card = info->card;
2186 channel = info->line - card->first_line;
2187 if (!IS_CYC_Z(*card)) {
2188 chip = channel >> 2;
2189 channel &= 0x03;
2190 index = card->bus_index;
2191 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2192
2193 #ifdef CY_DEBUG_OPEN
2194 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2195 "channel %d, base_addr %p\n",
2196 card, chip, channel, base_addr);
2197 #endif
2198
2199 spin_lock_irqsave(&card->card_lock, flags);
2200
2201 /* Clear delta_msr_wait queue to avoid mem leaks. */
2202 wake_up_interruptible(&info->delta_msr_wait);
2203
2204 if (info->xmit_buf) {
2205 unsigned char *temp;
2206 temp = info->xmit_buf;
2207 info->xmit_buf = NULL;
2208 free_page((unsigned long)temp);
2209 }
2210 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2211 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2212 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2213 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2214 #ifdef CY_DEBUG_DTR
2215 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2216 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2217 readb(base_addr + (CyMSVR1 << index)),
2218 readb(base_addr + (CyMSVR2 << index)));
2219 #endif
2220 }
2221 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2222 /* it may be appropriate to clear _XMIT at
2223 some later date (after testing)!!! */
2224
2225 if (info->tty) {
2226 set_bit(TTY_IO_ERROR, &info->tty->flags);
2227 }
2228 info->flags &= ~ASYNC_INITIALIZED;
2229 spin_unlock_irqrestore(&card->card_lock, flags);
2230 } else {
2231 struct FIRM_ID __iomem *firm_id;
2232 struct ZFW_CTRL __iomem *zfw_ctrl;
2233 struct BOARD_CTRL __iomem *board_ctrl;
2234 struct CH_CTRL __iomem *ch_ctrl;
2235 int retval;
2236
2237 base_addr = card->base_addr;
2238 #ifdef CY_DEBUG_OPEN
2239 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2240 "base_addr %p\n", card, channel, base_addr);
2241 #endif
2242
2243 firm_id = base_addr + ID_ADDRESS;
2244 if (!ISZLOADED(*card)) {
2245 return;
2246 }
2247
2248 zfw_ctrl = card->base_addr +
2249 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2250 board_ctrl = &zfw_ctrl->board_ctrl;
2251 ch_ctrl = zfw_ctrl->ch_ctrl;
2252
2253 spin_lock_irqsave(&card->card_lock, flags);
2254
2255 if (info->xmit_buf) {
2256 unsigned char *temp;
2257 temp = info->xmit_buf;
2258 info->xmit_buf = NULL;
2259 free_page((unsigned long)temp);
2260 }
2261
2262 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2263 cy_writel(&ch_ctrl[channel].rs_control,
2264 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2265 ~(C_RS_RTS | C_RS_DTR)));
2266 retval = cyz_issue_cmd(info->card, channel,
2267 C_CM_IOCTLM, 0L);
2268 if (retval != 0) {
2269 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2270 "was %x\n", info->line, retval);
2271 }
2272 #ifdef CY_DEBUG_DTR
2273 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2274 #endif
2275 }
2276
2277 if (info->tty) {
2278 set_bit(TTY_IO_ERROR, &info->tty->flags);
2279 }
2280 info->flags &= ~ASYNC_INITIALIZED;
2281
2282 spin_unlock_irqrestore(&card->card_lock, flags);
2283 }
2284
2285 #ifdef CY_DEBUG_OPEN
2286 printk(KERN_DEBUG "cyc shutdown done\n");
2287 #endif
2288 } /* shutdown */
2289
2290 /*
2291 * ------------------------------------------------------------
2292 * cy_open() and friends
2293 * ------------------------------------------------------------
2294 */
2295
2296 static int
2297 block_til_ready(struct tty_struct *tty, struct file *filp,
2298 struct cyclades_port *info)
2299 {
2300 DECLARE_WAITQUEUE(wait, current);
2301 struct cyclades_card *cinfo;
2302 unsigned long flags;
2303 int chip, channel, index;
2304 int retval;
2305 void __iomem *base_addr;
2306
2307 cinfo = info->card;
2308 channel = info->line - cinfo->first_line;
2309
2310 /*
2311 * If the device is in the middle of being closed, then block
2312 * until it's done, and then try again.
2313 */
2314 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2315 wait_event_interruptible(info->close_wait,
2316 !(info->flags & ASYNC_CLOSING));
2317 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2318 }
2319
2320 /*
2321 * If non-blocking mode is set, then make the check up front
2322 * and then exit.
2323 */
2324 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2325 info->flags |= ASYNC_NORMAL_ACTIVE;
2326 return 0;
2327 }
2328
2329 /*
2330 * Block waiting for the carrier detect and the line to become
2331 * free (i.e., not in use by the callout). While we are in
2332 * this loop, info->count is dropped by one, so that
2333 * cy_close() knows when to free things. We restore it upon
2334 * exit, either normal or abnormal.
2335 */
2336 retval = 0;
2337 add_wait_queue(&info->open_wait, &wait);
2338 #ifdef CY_DEBUG_OPEN
2339 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2340 "count = %d\n", info->line, info->count);
2341 #endif
2342 spin_lock_irqsave(&cinfo->card_lock, flags);
2343 if (!tty_hung_up_p(filp))
2344 info->count--;
2345 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2346 #ifdef CY_DEBUG_COUNT
2347 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2348 "%d\n", current->pid, info->count);
2349 #endif
2350 info->blocked_open++;
2351
2352 if (!IS_CYC_Z(*cinfo)) {
2353 chip = channel >> 2;
2354 channel &= 0x03;
2355 index = cinfo->bus_index;
2356 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2357
2358 while (1) {
2359 spin_lock_irqsave(&cinfo->card_lock, flags);
2360 if ((tty->termios->c_cflag & CBAUD)) {
2361 cy_writeb(base_addr + (CyCAR << index),
2362 (u_char) channel);
2363 cy_writeb(base_addr + (CyMSVR1 << index),
2364 CyRTS);
2365 cy_writeb(base_addr + (CyMSVR2 << index),
2366 CyDTR);
2367 #ifdef CY_DEBUG_DTR
2368 printk(KERN_DEBUG "cyc:block_til_ready raising "
2369 "DTR\n");
2370 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2371 readb(base_addr + (CyMSVR1 << index)),
2372 readb(base_addr + (CyMSVR2 << index)));
2373 #endif
2374 }
2375 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2376
2377 set_current_state(TASK_INTERRUPTIBLE);
2378 if (tty_hung_up_p(filp) ||
2379 !(info->flags & ASYNC_INITIALIZED)) {
2380 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2381 -EAGAIN : -ERESTARTSYS);
2382 break;
2383 }
2384
2385 spin_lock_irqsave(&cinfo->card_lock, flags);
2386 cy_writeb(base_addr + (CyCAR << index),
2387 (u_char) channel);
2388 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2389 (readb(base_addr +
2390 (CyMSVR1 << index)) & CyDCD))) {
2391 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2392 break;
2393 }
2394 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2395
2396 if (signal_pending(current)) {
2397 retval = -ERESTARTSYS;
2398 break;
2399 }
2400 #ifdef CY_DEBUG_OPEN
2401 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2402 "ttyC%d, count = %d\n",
2403 info->line, info->count);
2404 #endif
2405 schedule();
2406 }
2407 } else {
2408 struct FIRM_ID __iomem *firm_id;
2409 struct ZFW_CTRL __iomem *zfw_ctrl;
2410 struct BOARD_CTRL __iomem *board_ctrl;
2411 struct CH_CTRL __iomem *ch_ctrl;
2412
2413 base_addr = cinfo->base_addr;
2414 firm_id = base_addr + ID_ADDRESS;
2415 if (!ISZLOADED(*cinfo)) {
2416 __set_current_state(TASK_RUNNING);
2417 remove_wait_queue(&info->open_wait, &wait);
2418 return -EINVAL;
2419 }
2420
2421 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2422 board_ctrl = &zfw_ctrl->board_ctrl;
2423 ch_ctrl = zfw_ctrl->ch_ctrl;
2424
2425 while (1) {
2426 if ((tty->termios->c_cflag & CBAUD)) {
2427 cy_writel(&ch_ctrl[channel].rs_control,
2428 readl(&ch_ctrl[channel].rs_control) |
2429 C_RS_RTS | C_RS_DTR);
2430 retval = cyz_issue_cmd(cinfo,
2431 channel, C_CM_IOCTLM, 0L);
2432 if (retval != 0) {
2433 printk(KERN_ERR "cyc:block_til_ready "
2434 "retval on ttyC%d was %x\n",
2435 info->line, retval);
2436 }
2437 #ifdef CY_DEBUG_DTR
2438 printk(KERN_DEBUG "cyc:block_til_ready raising "
2439 "Z DTR\n");
2440 #endif
2441 }
2442
2443 set_current_state(TASK_INTERRUPTIBLE);
2444 if (tty_hung_up_p(filp) ||
2445 !(info->flags & ASYNC_INITIALIZED)) {
2446 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2447 -EAGAIN : -ERESTARTSYS);
2448 break;
2449 }
2450 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2451 (readl(&ch_ctrl[channel].rs_status) &
2452 C_RS_DCD))) {
2453 break;
2454 }
2455 if (signal_pending(current)) {
2456 retval = -ERESTARTSYS;
2457 break;
2458 }
2459 #ifdef CY_DEBUG_OPEN
2460 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2461 "ttyC%d, count = %d\n",
2462 info->line, info->count);
2463 #endif
2464 schedule();
2465 }
2466 }
2467 __set_current_state(TASK_RUNNING);
2468 remove_wait_queue(&info->open_wait, &wait);
2469 if (!tty_hung_up_p(filp)) {
2470 info->count++;
2471 #ifdef CY_DEBUG_COUNT
2472 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2473 "count to %d\n", current->pid, info->count);
2474 #endif
2475 }
2476 info->blocked_open--;
2477 #ifdef CY_DEBUG_OPEN
2478 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2479 "count = %d\n", info->line, info->count);
2480 #endif
2481 if (retval)
2482 return retval;
2483 info->flags |= ASYNC_NORMAL_ACTIVE;
2484 return 0;
2485 } /* block_til_ready */
2486
2487 /*
2488 * This routine is called whenever a serial port is opened. It
2489 * performs the serial-specific initialization for the tty structure.
2490 */
2491 static int cy_open(struct tty_struct *tty, struct file *filp)
2492 {
2493 struct cyclades_port *info;
2494 unsigned int i;
2495 int retval, line;
2496
2497 line = tty->index;
2498 if ((line < 0) || (NR_PORTS <= line)) {
2499 return -ENODEV;
2500 }
2501 for (i = 0; i < NR_CARDS; i++)
2502 if (line < cy_card[i].first_line + cy_card[i].nports &&
2503 line >= cy_card[i].first_line)
2504 break;
2505 if (i >= NR_CARDS)
2506 return -ENODEV;
2507 info = &cy_card[i].ports[line - cy_card[i].first_line];
2508 if (info->line < 0) {
2509 return -ENODEV;
2510 }
2511
2512 /* If the card's firmware hasn't been loaded,
2513 treat it as absent from the system. This
2514 will make the user pay attention.
2515 */
2516 if (IS_CYC_Z(*info->card)) {
2517 struct cyclades_card *cinfo = info->card;
2518 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2519
2520 if (!ISZLOADED(*cinfo)) {
2521 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2522 (cinfo->ctl_addr))->mail_box_0)) &&
2523 Z_FPGA_CHECK(*cinfo)) &&
2524 (ZFIRM_HLT == readl(
2525 &firm_id->signature))) {
2526 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2527 "need an external power supply for "
2528 "this number of ports.\nFirmware "
2529 "halted.\n");
2530 } else {
2531 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2532 "yet loaded\n");
2533 }
2534 return -ENODEV;
2535 }
2536 #ifdef CONFIG_CYZ_INTR
2537 else {
2538 /* In case this Z board is operating in interrupt mode, its
2539 interrupts should be enabled as soon as the first open
2540 happens to one of its ports. */
2541 if (!cinfo->intr_enabled) {
2542 struct ZFW_CTRL __iomem *zfw_ctrl;
2543 struct BOARD_CTRL __iomem *board_ctrl;
2544
2545 zfw_ctrl = cinfo->base_addr +
2546 (readl(&firm_id->zfwctrl_addr) &
2547 0xfffff);
2548
2549 board_ctrl = &zfw_ctrl->board_ctrl;
2550
2551 /* Enable interrupts on the PLX chip */
2552 cy_writew(cinfo->ctl_addr + 0x68,
2553 readw(cinfo->ctl_addr + 0x68) | 0x0900);
2554 /* Enable interrupts on the FW */
2555 retval = cyz_issue_cmd(cinfo, 0,
2556 C_CM_IRQ_ENBL, 0L);
2557 if (retval != 0) {
2558 printk(KERN_ERR "cyc:IRQ enable retval "
2559 "was %x\n", retval);
2560 }
2561 cinfo->nports =
2562 (int)readl(&board_ctrl->n_channel);
2563 cinfo->intr_enabled = 1;
2564 }
2565 }
2566 #endif /* CONFIG_CYZ_INTR */
2567 /* Make sure this Z port really exists in hardware */
2568 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2569 return -ENODEV;
2570 }
2571 #ifdef CY_DEBUG_OTHER
2572 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2573 #endif
2574 tty->driver_data = info;
2575 info->tty = tty;
2576 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2577 return -ENODEV;
2578 }
2579 #ifdef CY_DEBUG_OPEN
2580 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2581 info->count);
2582 #endif
2583 info->count++;
2584 #ifdef CY_DEBUG_COUNT
2585 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2586 current->pid, info->count);
2587 #endif
2588
2589 /*
2590 * If the port is the middle of closing, bail out now
2591 */
2592 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2593 wait_event_interruptible(info->close_wait,
2594 !(info->flags & ASYNC_CLOSING));
2595 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2596 }
2597
2598 /*
2599 * Start up serial port
2600 */
2601 retval = startup(info);
2602 if (retval) {
2603 return retval;
2604 }
2605
2606 retval = block_til_ready(tty, filp, info);
2607 if (retval) {
2608 #ifdef CY_DEBUG_OPEN
2609 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2610 "with %d\n", retval);
2611 #endif
2612 return retval;
2613 }
2614
2615 info->throttle = 0;
2616
2617 #ifdef CY_DEBUG_OPEN
2618 printk(KERN_DEBUG "cyc:cy_open done\n");
2619 #endif
2620 return 0;
2621 } /* cy_open */
2622
2623 /*
2624 * cy_wait_until_sent() --- wait until the transmitter is empty
2625 */
2626 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2627 {
2628 struct cyclades_card *card;
2629 struct cyclades_port *info = tty->driver_data;
2630 void __iomem *base_addr;
2631 int chip, channel, index;
2632 unsigned long orig_jiffies;
2633 int char_time;
2634
2635 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2636 return;
2637
2638 if (info->xmit_fifo_size == 0)
2639 return; /* Just in case.... */
2640
2641 orig_jiffies = jiffies;
2642 /*
2643 * Set the check interval to be 1/5 of the estimated time to
2644 * send a single character, and make it at least 1. The check
2645 * interval should also be less than the timeout.
2646 *
2647 * Note: we have to use pretty tight timings here to satisfy
2648 * the NIST-PCTS.
2649 */
2650 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2651 char_time = char_time / 5;
2652 if (char_time <= 0)
2653 char_time = 1;
2654 if (timeout < 0)
2655 timeout = 0;
2656 if (timeout)
2657 char_time = min(char_time, timeout);
2658 /*
2659 * If the transmitter hasn't cleared in twice the approximate
2660 * amount of time to send the entire FIFO, it probably won't
2661 * ever clear. This assumes the UART isn't doing flow
2662 * control, which is currently the case. Hence, if it ever
2663 * takes longer than info->timeout, this is probably due to a
2664 * UART bug of some kind. So, we clamp the timeout parameter at
2665 * 2*info->timeout.
2666 */
2667 if (!timeout || timeout > 2 * info->timeout)
2668 timeout = 2 * info->timeout;
2669 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2670 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2671 timeout, char_time, jiffies);
2672 #endif
2673 card = info->card;
2674 channel = (info->line) - (card->first_line);
2675 if (!IS_CYC_Z(*card)) {
2676 chip = channel >> 2;
2677 channel &= 0x03;
2678 index = card->bus_index;
2679 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2680 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2681 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2682 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2683 #endif
2684 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2685 break;
2686 if (timeout && time_after(jiffies, orig_jiffies +
2687 timeout))
2688 break;
2689 }
2690 }
2691 /* Run one more char cycle */
2692 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2693 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2694 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2695 #endif
2696 }
2697
2698 /*
2699 * This routine is called when a particular tty device is closed.
2700 */
2701 static void cy_close(struct tty_struct *tty, struct file *filp)
2702 {
2703 struct cyclades_port *info = tty->driver_data;
2704 struct cyclades_card *card;
2705 unsigned long flags;
2706
2707 #ifdef CY_DEBUG_OTHER
2708 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2709 #endif
2710
2711 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2712 return;
2713 }
2714
2715 card = info->card;
2716
2717 spin_lock_irqsave(&card->card_lock, flags);
2718 /* If the TTY is being hung up, nothing to do */
2719 if (tty_hung_up_p(filp)) {
2720 spin_unlock_irqrestore(&card->card_lock, flags);
2721 return;
2722 }
2723 #ifdef CY_DEBUG_OPEN
2724 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2725 info->count);
2726 #endif
2727 if ((tty->count == 1) && (info->count != 1)) {
2728 /*
2729 * Uh, oh. tty->count is 1, which means that the tty
2730 * structure will be freed. Info->count should always
2731 * be one in these conditions. If it's greater than
2732 * one, we've got real problems, since it means the
2733 * serial port won't be shutdown.
2734 */
2735 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2736 "tty->count is 1, info->count is %d\n", info->count);
2737 info->count = 1;
2738 }
2739 #ifdef CY_DEBUG_COUNT
2740 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
2741 current->pid, info->count - 1);
2742 #endif
2743 if (--info->count < 0) {
2744 #ifdef CY_DEBUG_COUNT
2745 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2746 #endif
2747 info->count = 0;
2748 }
2749 if (info->count) {
2750 spin_unlock_irqrestore(&card->card_lock, flags);
2751 return;
2752 }
2753 info->flags |= ASYNC_CLOSING;
2754
2755 /*
2756 * Now we wait for the transmit buffer to clear; and we notify
2757 * the line discipline to only process XON/XOFF characters.
2758 */
2759 tty->closing = 1;
2760 spin_unlock_irqrestore(&card->card_lock, flags);
2761 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2762 tty_wait_until_sent(tty, info->closing_wait);
2763 }
2764 spin_lock_irqsave(&card->card_lock, flags);
2765
2766 if (!IS_CYC_Z(*card)) {
2767 int channel = info->line - card->first_line;
2768 int index = card->bus_index;
2769 void __iomem *base_addr = card->base_addr +
2770 (cy_chip_offset[channel >> 2] << index);
2771 /* Stop accepting input */
2772 channel &= 0x03;
2773 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2774 cy_writeb(base_addr + (CySRER << index),
2775 readb(base_addr + (CySRER << index)) & ~CyRxData);
2776 if (info->flags & ASYNC_INITIALIZED) {
2777 /* Waiting for on-board buffers to be empty before closing
2778 the port */
2779 spin_unlock_irqrestore(&card->card_lock, flags);
2780 cy_wait_until_sent(tty, info->timeout);
2781 spin_lock_irqsave(&card->card_lock, flags);
2782 }
2783 } else {
2784 #ifdef Z_WAKE
2785 /* Waiting for on-board buffers to be empty before closing the port */
2786 void __iomem *base_addr = card->base_addr;
2787 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2788 struct ZFW_CTRL __iomem *zfw_ctrl =
2789 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2790 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2791 int channel = info->line - card->first_line;
2792 int retval;
2793
2794 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2795 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2796 if (retval != 0) {
2797 printk(KERN_DEBUG "cyc:cy_close retval on "
2798 "ttyC%d was %x\n", info->line, retval);
2799 }
2800 spin_unlock_irqrestore(&card->card_lock, flags);
2801 wait_for_completion_interruptible(&info->shutdown_wait);
2802 spin_lock_irqsave(&card->card_lock, flags);
2803 }
2804 #endif
2805 }
2806
2807 spin_unlock_irqrestore(&card->card_lock, flags);
2808 shutdown(info);
2809 if (tty->driver->flush_buffer)
2810 tty->driver->flush_buffer(tty);
2811 tty_ldisc_flush(tty);
2812 spin_lock_irqsave(&card->card_lock, flags);
2813
2814 tty->closing = 0;
2815 info->event = 0;
2816 info->tty = NULL;
2817 if (info->blocked_open) {
2818 spin_unlock_irqrestore(&card->card_lock, flags);
2819 if (info->close_delay) {
2820 msleep_interruptible(jiffies_to_msecs
2821 (info->close_delay));
2822 }
2823 wake_up_interruptible(&info->open_wait);
2824 spin_lock_irqsave(&card->card_lock, flags);
2825 }
2826 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2827 wake_up_interruptible(&info->close_wait);
2828
2829 #ifdef CY_DEBUG_OTHER
2830 printk(KERN_DEBUG "cyc:cy_close done\n");
2831 #endif
2832
2833 spin_unlock_irqrestore(&card->card_lock, flags);
2834 } /* cy_close */
2835
2836 /* This routine gets called when tty_write has put something into
2837 * the write_queue. The characters may come from user space or
2838 * kernel space.
2839 *
2840 * This routine will return the number of characters actually
2841 * accepted for writing.
2842 *
2843 * If the port is not already transmitting stuff, start it off by
2844 * enabling interrupts. The interrupt service routine will then
2845 * ensure that the characters are sent.
2846 * If the port is already active, there is no need to kick it.
2847 *
2848 */
2849 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2850 {
2851 struct cyclades_port *info = tty->driver_data;
2852 unsigned long flags;
2853 int c, ret = 0;
2854
2855 #ifdef CY_DEBUG_IO
2856 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2857 #endif
2858
2859 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2860 return 0;
2861 }
2862
2863 if (!info->xmit_buf)
2864 return 0;
2865
2866 spin_lock_irqsave(&info->card->card_lock, flags);
2867 while (1) {
2868 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2869 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2870
2871 if (c <= 0)
2872 break;
2873
2874 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2875 info->xmit_head = (info->xmit_head + c) &
2876 (SERIAL_XMIT_SIZE - 1);
2877 info->xmit_cnt += c;
2878 buf += c;
2879 count -= c;
2880 ret += c;
2881 }
2882 spin_unlock_irqrestore(&info->card->card_lock, flags);
2883
2884 info->idle_stats.xmit_bytes += ret;
2885 info->idle_stats.xmit_idle = jiffies;
2886
2887 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2888 start_xmit(info);
2889 }
2890 return ret;
2891 } /* cy_write */
2892
2893 /*
2894 * This routine is called by the kernel to write a single
2895 * character to the tty device. If the kernel uses this routine,
2896 * it must call the flush_chars() routine (if defined) when it is
2897 * done stuffing characters into the driver. If there is no room
2898 * in the queue, the character is ignored.
2899 */
2900 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2901 {
2902 struct cyclades_port *info = tty->driver_data;
2903 unsigned long flags;
2904
2905 #ifdef CY_DEBUG_IO
2906 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2907 #endif
2908
2909 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2910 return;
2911
2912 if (!info->xmit_buf)
2913 return;
2914
2915 spin_lock_irqsave(&info->card->card_lock, flags);
2916 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2917 spin_unlock_irqrestore(&info->card->card_lock, flags);
2918 return;
2919 }
2920
2921 info->xmit_buf[info->xmit_head++] = ch;
2922 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2923 info->xmit_cnt++;
2924 info->idle_stats.xmit_bytes++;
2925 info->idle_stats.xmit_idle = jiffies;
2926 spin_unlock_irqrestore(&info->card->card_lock, flags);
2927 } /* cy_put_char */
2928
2929 /*
2930 * This routine is called by the kernel after it has written a
2931 * series of characters to the tty device using put_char().
2932 */
2933 static void cy_flush_chars(struct tty_struct *tty)
2934 {
2935 struct cyclades_port *info = tty->driver_data;
2936
2937 #ifdef CY_DEBUG_IO
2938 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2939 #endif
2940
2941 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2942 return;
2943
2944 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2945 !info->xmit_buf)
2946 return;
2947
2948 start_xmit(info);
2949 } /* cy_flush_chars */
2950
2951 /*
2952 * This routine returns the numbers of characters the tty driver
2953 * will accept for queuing to be written. This number is subject
2954 * to change as output buffers get emptied, or if the output flow
2955 * control is activated.
2956 */
2957 static int cy_write_room(struct tty_struct *tty)
2958 {
2959 struct cyclades_port *info = tty->driver_data;
2960 int ret;
2961
2962 #ifdef CY_DEBUG_IO
2963 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2964 #endif
2965
2966 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2967 return 0;
2968 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2969 if (ret < 0)
2970 ret = 0;
2971 return ret;
2972 } /* cy_write_room */
2973
2974 static int cy_chars_in_buffer(struct tty_struct *tty)
2975 {
2976 struct cyclades_card *card;
2977 struct cyclades_port *info = tty->driver_data;
2978 int channel;
2979
2980 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2981 return 0;
2982
2983 card = info->card;
2984 channel = (info->line) - (card->first_line);
2985
2986 #ifdef Z_EXT_CHARS_IN_BUFFER
2987 if (!IS_CYC_Z(cy_card[card])) {
2988 #endif /* Z_EXT_CHARS_IN_BUFFER */
2989 #ifdef CY_DEBUG_IO
2990 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2991 info->line, info->xmit_cnt);
2992 #endif
2993 return info->xmit_cnt;
2994 #ifdef Z_EXT_CHARS_IN_BUFFER
2995 } else {
2996 static struct FIRM_ID *firm_id;
2997 static struct ZFW_CTRL *zfw_ctrl;
2998 static struct CH_CTRL *ch_ctrl;
2999 static struct BUF_CTRL *buf_ctrl;
3000 int char_count;
3001 __u32 tx_put, tx_get, tx_bufsize;
3002
3003 firm_id = card->base_addr + ID_ADDRESS;
3004 zfw_ctrl = card->base_addr +
3005 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3006 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3007 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3008
3009 tx_get = readl(&buf_ctrl->tx_get);
3010 tx_put = readl(&buf_ctrl->tx_put);
3011 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
3012 if (tx_put >= tx_get)
3013 char_count = tx_put - tx_get;
3014 else
3015 char_count = tx_put - tx_get + tx_bufsize;
3016 #ifdef CY_DEBUG_IO
3017 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
3018 info->line, info->xmit_cnt + char_count);
3019 #endif
3020 return info->xmit_cnt + char_count;
3021 }
3022 #endif /* Z_EXT_CHARS_IN_BUFFER */
3023 } /* cy_chars_in_buffer */
3024
3025 /*
3026 * ------------------------------------------------------------
3027 * cy_ioctl() and friends
3028 * ------------------------------------------------------------
3029 */
3030
3031 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
3032 {
3033 int co, co_val, bpr;
3034 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3035 25000000);
3036
3037 if (baud == 0) {
3038 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3039 return;
3040 }
3041
3042 /* determine which prescaler to use */
3043 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3044 if (cy_clock / co_val / baud > 63)
3045 break;
3046 }
3047
3048 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3049 if (bpr > 255)
3050 bpr = 255;
3051
3052 info->tbpr = info->rbpr = bpr;
3053 info->tco = info->rco = co;
3054 }
3055
3056 /*
3057 * This routine finds or computes the various line characteristics.
3058 * It used to be called config_setup
3059 */
3060 static void set_line_char(struct cyclades_port *info)
3061 {
3062 struct cyclades_card *card;
3063 unsigned long flags;
3064 void __iomem *base_addr;
3065 int chip, channel, index;
3066 unsigned cflag, iflag;
3067 unsigned short chip_number;
3068 int baud, baud_rate = 0;
3069 int i;
3070
3071 if (!info->tty || !info->tty->termios) {
3072 return;
3073 }
3074 if (info->line == -1) {
3075 return;
3076 }
3077 cflag = info->tty->termios->c_cflag;
3078 iflag = info->tty->termios->c_iflag;
3079
3080 /*
3081 * Set up the tty->alt_speed kludge
3082 */
3083 if (info->tty) {
3084 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3085 info->tty->alt_speed = 57600;
3086 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3087 info->tty->alt_speed = 115200;
3088 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3089 info->tty->alt_speed = 230400;
3090 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3091 info->tty->alt_speed = 460800;
3092 }
3093
3094 card = info->card;
3095 channel = info->line - card->first_line;
3096 chip_number = channel / 4;
3097
3098 if (!IS_CYC_Z(*card)) {
3099
3100 index = card->bus_index;
3101
3102 /* baud rate */
3103 baud = tty_get_baud_rate(info->tty);
3104 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3105 ASYNC_SPD_CUST) {
3106 if (info->custom_divisor)
3107 baud_rate = info->baud / info->custom_divisor;
3108 else
3109 baud_rate = info->baud;
3110 } else if (baud > CD1400_MAX_SPEED) {
3111 baud = CD1400_MAX_SPEED;
3112 }
3113 /* find the baud index */
3114 for (i = 0; i < 20; i++) {
3115 if (baud == baud_table[i]) {
3116 break;
3117 }
3118 }
3119 if (i == 20) {
3120 i = 19; /* CD1400_MAX_SPEED */
3121 }
3122
3123 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3124 ASYNC_SPD_CUST) {
3125 cyy_baud_calc(info, baud_rate);
3126 } else {
3127 if (info->chip_rev >= CD1400_REV_J) {
3128 /* It is a CD1400 rev. J or later */
3129 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3130 info->tco = baud_co_60[i]; /* Tx CO */
3131 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3132 info->rco = baud_co_60[i]; /* Rx CO */
3133 } else {
3134 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3135 info->tco = baud_co_25[i]; /* Tx CO */
3136 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3137 info->rco = baud_co_25[i]; /* Rx CO */
3138 }
3139 }
3140 if (baud_table[i] == 134) {
3141 /* get it right for 134.5 baud */
3142 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3143 2;
3144 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3145 ASYNC_SPD_CUST) {
3146 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3147 baud_rate) + 2;
3148 } else if (baud_table[i]) {
3149 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3150 baud_table[i]) + 2;
3151 /* this needs to be propagated into the card info */
3152 } else {
3153 info->timeout = 0;
3154 }
3155 /* By tradition (is it a standard?) a baud rate of zero
3156 implies the line should be/has been closed. A bit
3157 later in this routine such a test is performed. */
3158
3159 /* byte size and parity */
3160 info->cor5 = 0;
3161 info->cor4 = 0;
3162 /* receive threshold */
3163 info->cor3 = (info->default_threshold ?
3164 info->default_threshold : baud_cor3[i]);
3165 info->cor2 = CyETC;
3166 switch (cflag & CSIZE) {
3167 case CS5:
3168 info->cor1 = Cy_5_BITS;
3169 break;
3170 case CS6:
3171 info->cor1 = Cy_6_BITS;
3172 break;
3173 case CS7:
3174 info->cor1 = Cy_7_BITS;
3175 break;
3176 case CS8:
3177 info->cor1 = Cy_8_BITS;
3178 break;
3179 }
3180 if (cflag & CSTOPB) {
3181 info->cor1 |= Cy_2_STOP;
3182 }
3183 if (cflag & PARENB) {
3184 if (cflag & PARODD) {
3185 info->cor1 |= CyPARITY_O;
3186 } else {
3187 info->cor1 |= CyPARITY_E;
3188 }
3189 } else {
3190 info->cor1 |= CyPARITY_NONE;
3191 }
3192
3193 /* CTS flow control flag */
3194 if (cflag & CRTSCTS) {
3195 info->flags |= ASYNC_CTS_FLOW;
3196 info->cor2 |= CyCtsAE;
3197 } else {
3198 info->flags &= ~ASYNC_CTS_FLOW;
3199 info->cor2 &= ~CyCtsAE;
3200 }
3201 if (cflag & CLOCAL)
3202 info->flags &= ~ASYNC_CHECK_CD;
3203 else
3204 info->flags |= ASYNC_CHECK_CD;
3205
3206 /***********************************************
3207 The hardware option, CyRtsAO, presents RTS when
3208 the chip has characters to send. Since most modems
3209 use RTS as reverse (inbound) flow control, this
3210 option is not used. If inbound flow control is
3211 necessary, DTR can be programmed to provide the
3212 appropriate signals for use with a non-standard
3213 cable. Contact Marcio Saito for details.
3214 ***********************************************/
3215
3216 chip = channel >> 2;
3217 channel &= 0x03;
3218 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3219
3220 spin_lock_irqsave(&card->card_lock, flags);
3221 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3222
3223 /* tx and rx baud rate */
3224
3225 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3226 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3227 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3228 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3229
3230 /* set line characteristics according configuration */
3231
3232 cy_writeb(base_addr + (CySCHR1 << index),
3233 START_CHAR(info->tty));
3234 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3235 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3236 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3237 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3238 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3239 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3240
3241 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3242 CyCOR3ch, index);
3243
3244 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3245 cy_writeb(base_addr + (CyRTPR << index),
3246 (info->default_timeout ? info->default_timeout : 0x02));
3247 /* 10ms rx timeout */
3248
3249 if (C_CLOCAL(info->tty)) {
3250 /* without modem intr */
3251 cy_writeb(base_addr + (CySRER << index),
3252 readb(base_addr + (CySRER << index)) | CyMdmCh);
3253 /* act on 1->0 modem transitions */
3254 if ((cflag & CRTSCTS) && info->rflow) {
3255 cy_writeb(base_addr + (CyMCOR1 << index),
3256 (CyCTS | rflow_thr[i]));
3257 } else {
3258 cy_writeb(base_addr + (CyMCOR1 << index),
3259 CyCTS);
3260 }
3261 /* act on 0->1 modem transitions */
3262 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3263 } else {
3264 /* without modem intr */
3265 cy_writeb(base_addr + (CySRER << index),
3266 readb(base_addr +
3267 (CySRER << index)) | CyMdmCh);
3268 /* act on 1->0 modem transitions */
3269 if ((cflag & CRTSCTS) && info->rflow) {
3270 cy_writeb(base_addr + (CyMCOR1 << index),
3271 (CyDSR | CyCTS | CyRI | CyDCD |
3272 rflow_thr[i]));
3273 } else {
3274 cy_writeb(base_addr + (CyMCOR1 << index),
3275 CyDSR | CyCTS | CyRI | CyDCD);
3276 }
3277 /* act on 0->1 modem transitions */
3278 cy_writeb(base_addr + (CyMCOR2 << index),
3279 CyDSR | CyCTS | CyRI | CyDCD);
3280 }
3281
3282 if (i == 0) { /* baud rate is zero, turn off line */
3283 if (info->rtsdtr_inv) {
3284 cy_writeb(base_addr + (CyMSVR1 << index),
3285 ~CyRTS);
3286 } else {
3287 cy_writeb(base_addr + (CyMSVR2 << index),
3288 ~CyDTR);
3289 }
3290 #ifdef CY_DEBUG_DTR
3291 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3292 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3293 readb(base_addr + (CyMSVR1 << index)),
3294 readb(base_addr + (CyMSVR2 << index)));
3295 #endif
3296 } else {
3297 if (info->rtsdtr_inv) {
3298 cy_writeb(base_addr + (CyMSVR1 << index),
3299 CyRTS);
3300 } else {
3301 cy_writeb(base_addr + (CyMSVR2 << index),
3302 CyDTR);
3303 }
3304 #ifdef CY_DEBUG_DTR
3305 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3306 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3307 readb(base_addr + (CyMSVR1 << index)),
3308 readb(base_addr + (CyMSVR2 << index)));
3309 #endif
3310 }
3311
3312 if (info->tty) {
3313 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3314 }
3315 spin_unlock_irqrestore(&card->card_lock, flags);
3316
3317 } else {
3318 struct FIRM_ID __iomem *firm_id;
3319 struct ZFW_CTRL __iomem *zfw_ctrl;
3320 struct BOARD_CTRL __iomem *board_ctrl;
3321 struct CH_CTRL __iomem *ch_ctrl;
3322 struct BUF_CTRL __iomem *buf_ctrl;
3323 __u32 sw_flow;
3324 int retval;
3325
3326 firm_id = card->base_addr + ID_ADDRESS;
3327 if (!ISZLOADED(*card)) {
3328 return;
3329 }
3330
3331 zfw_ctrl = card->base_addr +
3332 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3333 board_ctrl = &zfw_ctrl->board_ctrl;
3334 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3335 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3336
3337 /* baud rate */
3338 baud = tty_get_baud_rate(info->tty);
3339 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3340 ASYNC_SPD_CUST) {
3341 if (info->custom_divisor)
3342 baud_rate = info->baud / info->custom_divisor;
3343 else
3344 baud_rate = info->baud;
3345 } else if (baud > CYZ_MAX_SPEED) {
3346 baud = CYZ_MAX_SPEED;
3347 }
3348 cy_writel(&ch_ctrl->comm_baud, baud);
3349
3350 if (baud == 134) {
3351 /* get it right for 134.5 baud */
3352 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3353 2;
3354 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3355 ASYNC_SPD_CUST) {
3356 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3357 baud_rate) + 2;
3358 } else if (baud) {
3359 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3360 baud) + 2;
3361 /* this needs to be propagated into the card info */
3362 } else {
3363 info->timeout = 0;
3364 }
3365
3366 /* byte size and parity */
3367 switch (cflag & CSIZE) {
3368 case CS5:
3369 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3370 break;
3371 case CS6:
3372 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3373 break;
3374 case CS7:
3375 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3376 break;
3377 case CS8:
3378 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3379 break;
3380 }
3381 if (cflag & CSTOPB) {
3382 cy_writel(&ch_ctrl->comm_data_l,
3383 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3384 } else {
3385 cy_writel(&ch_ctrl->comm_data_l,
3386 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3387 }
3388 if (cflag & PARENB) {
3389 if (cflag & PARODD) {
3390 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3391 } else {
3392 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3393 }
3394 } else {
3395 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3396 }
3397
3398 /* CTS flow control flag */
3399 if (cflag & CRTSCTS) {
3400 cy_writel(&ch_ctrl->hw_flow,
3401 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3402 } else {
3403 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3404 ~(C_RS_CTS | C_RS_RTS));
3405 }
3406 /* As the HW flow control is done in firmware, the driver
3407 doesn't need to care about it */
3408 info->flags &= ~ASYNC_CTS_FLOW;
3409
3410 /* XON/XOFF/XANY flow control flags */
3411 sw_flow = 0;
3412 if (iflag & IXON) {
3413 sw_flow |= C_FL_OXX;
3414 if (iflag & IXANY)
3415 sw_flow |= C_FL_OIXANY;
3416 }
3417 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3418
3419 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3420 if (retval != 0) {
3421 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3422 "was %x\n", info->line, retval);
3423 }
3424
3425 /* CD sensitivity */
3426 if (cflag & CLOCAL) {
3427 info->flags &= ~ASYNC_CHECK_CD;
3428 } else {
3429 info->flags |= ASYNC_CHECK_CD;
3430 }
3431
3432 if (baud == 0) { /* baud rate is zero, turn off line */
3433 cy_writel(&ch_ctrl->rs_control,
3434 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3435 #ifdef CY_DEBUG_DTR
3436 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3437 #endif
3438 } else {
3439 cy_writel(&ch_ctrl->rs_control,
3440 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3441 #ifdef CY_DEBUG_DTR
3442 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3443 #endif
3444 }
3445
3446 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3447 if (retval != 0) {
3448 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3449 "was %x\n", info->line, retval);
3450 }
3451
3452 if (info->tty) {
3453 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3454 }
3455 }
3456 } /* set_line_char */
3457
3458 static int
3459 get_serial_info(struct cyclades_port *info,
3460 struct serial_struct __user * retinfo)
3461 {
3462 struct serial_struct tmp;
3463 struct cyclades_card *cinfo = info->card;
3464
3465 if (!retinfo)
3466 return -EFAULT;
3467 memset(&tmp, 0, sizeof(tmp));
3468 tmp.type = info->type;
3469 tmp.line = info->line;
3470 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3471 cinfo->first_line;
3472 tmp.irq = cinfo->irq;
3473 tmp.flags = info->flags;
3474 tmp.close_delay = info->close_delay;
3475 tmp.closing_wait = info->closing_wait;
3476 tmp.baud_base = info->baud;
3477 tmp.custom_divisor = info->custom_divisor;
3478 tmp.hub6 = 0; /*!!! */
3479 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3480 } /* get_serial_info */
3481
3482 static int
3483 set_serial_info(struct cyclades_port *info,
3484 struct serial_struct __user * new_info)
3485 {
3486 struct serial_struct new_serial;
3487 struct cyclades_port old_info;
3488
3489 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3490 return -EFAULT;
3491 old_info = *info;
3492
3493 if (!capable(CAP_SYS_ADMIN)) {
3494 if (new_serial.close_delay != info->close_delay ||
3495 new_serial.baud_base != info->baud ||
3496 (new_serial.flags & ASYNC_FLAGS &
3497 ~ASYNC_USR_MASK) !=
3498 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3499 return -EPERM;
3500 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3501 (new_serial.flags & ASYNC_USR_MASK);
3502 info->baud = new_serial.baud_base;
3503 info->custom_divisor = new_serial.custom_divisor;
3504 goto check_and_exit;
3505 }
3506
3507 /*
3508 * OK, past this point, all the error checking has been done.
3509 * At this point, we start making changes.....
3510 */
3511
3512 info->baud = new_serial.baud_base;
3513 info->custom_divisor = new_serial.custom_divisor;
3514 info->flags = (info->flags & ~ASYNC_FLAGS) |
3515 (new_serial.flags & ASYNC_FLAGS);
3516 info->close_delay = new_serial.close_delay * HZ / 100;
3517 info->closing_wait = new_serial.closing_wait * HZ / 100;
3518
3519 check_and_exit:
3520 if (info->flags & ASYNC_INITIALIZED) {
3521 set_line_char(info);
3522 return 0;
3523 } else {
3524 return startup(info);
3525 }
3526 } /* set_serial_info */
3527
3528 /*
3529 * get_lsr_info - get line status register info
3530 *
3531 * Purpose: Let user call ioctl() to get info when the UART physically
3532 * is emptied. On bus types like RS485, the transmitter must
3533 * release the bus after transmitting. This must be done when
3534 * the transmit shift register is empty, not be done when the
3535 * transmit holding register is empty. This functionality
3536 * allows an RS485 driver to be written in user space.
3537 */
3538 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3539 {
3540 struct cyclades_card *card;
3541 int chip, channel, index;
3542 unsigned char status;
3543 unsigned int result;
3544 unsigned long flags;
3545 void __iomem *base_addr;
3546
3547 card = info->card;
3548 channel = (info->line) - (card->first_line);
3549 if (!IS_CYC_Z(*card)) {
3550 chip = channel >> 2;
3551 channel &= 0x03;
3552 index = card->bus_index;
3553 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3554
3555 spin_lock_irqsave(&card->card_lock, flags);
3556 status = readb(base_addr + (CySRER << index)) &
3557 (CyTxRdy | CyTxMpty);
3558 spin_unlock_irqrestore(&card->card_lock, flags);
3559 result = (status ? 0 : TIOCSER_TEMT);
3560 } else {
3561 /* Not supported yet */
3562 return -EINVAL;
3563 }
3564 return put_user(result, (unsigned long __user *)value);
3565 }
3566
3567 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3568 {
3569 struct cyclades_port *info = tty->driver_data;
3570 struct cyclades_card *card;
3571 int chip, channel, index;
3572 void __iomem *base_addr;
3573 unsigned long flags;
3574 unsigned char status;
3575 unsigned long lstatus;
3576 unsigned int result;
3577 struct FIRM_ID __iomem *firm_id;
3578 struct ZFW_CTRL __iomem *zfw_ctrl;
3579 struct BOARD_CTRL __iomem *board_ctrl;
3580 struct CH_CTRL __iomem *ch_ctrl;
3581
3582 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3583 return -ENODEV;
3584
3585 card = info->card;
3586 channel = info->line - card->first_line;
3587 if (!IS_CYC_Z(*card)) {
3588 chip = channel >> 2;
3589 channel &= 0x03;
3590 index = card->bus_index;
3591 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3592
3593 spin_lock_irqsave(&card->card_lock, flags);
3594 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3595 status = readb(base_addr + (CyMSVR1 << index));
3596 status |= readb(base_addr + (CyMSVR2 << index));
3597 spin_unlock_irqrestore(&card->card_lock, flags);
3598
3599 if (info->rtsdtr_inv) {
3600 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3601 ((status & CyDTR) ? TIOCM_RTS : 0);
3602 } else {
3603 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3604 ((status & CyDTR) ? TIOCM_DTR : 0);
3605 }
3606 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3607 ((status & CyRI) ? TIOCM_RNG : 0) |
3608 ((status & CyDSR) ? TIOCM_DSR : 0) |
3609 ((status & CyCTS) ? TIOCM_CTS : 0);
3610 } else {
3611 base_addr = card->base_addr;
3612 firm_id = card->base_addr + ID_ADDRESS;
3613 if (ISZLOADED(*card)) {
3614 zfw_ctrl = card->base_addr +
3615 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3616 board_ctrl = &zfw_ctrl->board_ctrl;
3617 ch_ctrl = zfw_ctrl->ch_ctrl;
3618 lstatus = readl(&ch_ctrl[channel].rs_status);
3619 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3620 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3621 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3622 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3623 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3624 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3625 } else {
3626 result = 0;
3627 return -ENODEV;
3628 }
3629
3630 }
3631 return result;
3632 } /* cy_tiomget */
3633
3634 static int
3635 cy_tiocmset(struct tty_struct *tty, struct file *file,
3636 unsigned int set, unsigned int clear)
3637 {
3638 struct cyclades_port *info = tty->driver_data;
3639 struct cyclades_card *card;
3640 int chip, channel, index;
3641 void __iomem *base_addr;
3642 unsigned long flags;
3643 struct FIRM_ID __iomem *firm_id;
3644 struct ZFW_CTRL __iomem *zfw_ctrl;
3645 struct BOARD_CTRL __iomem *board_ctrl;
3646 struct CH_CTRL __iomem *ch_ctrl;
3647 int retval;
3648
3649 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3650 return -ENODEV;
3651
3652 card = info->card;
3653 channel = (info->line) - (card->first_line);
3654 if (!IS_CYC_Z(*card)) {
3655 chip = channel >> 2;
3656 channel &= 0x03;
3657 index = card->bus_index;
3658 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3659
3660 if (set & TIOCM_RTS) {
3661 spin_lock_irqsave(&card->card_lock, flags);
3662 cy_writeb(base_addr + (CyCAR << index),
3663 (u_char) channel);
3664 if (info->rtsdtr_inv) {
3665 cy_writeb(base_addr + (CyMSVR2 << index),
3666 CyDTR);
3667 } else {
3668 cy_writeb(base_addr + (CyMSVR1 << index),
3669 CyRTS);
3670 }
3671 spin_unlock_irqrestore(&card->card_lock, flags);
3672 }
3673 if (clear & TIOCM_RTS) {
3674 spin_lock_irqsave(&card->card_lock, flags);
3675 cy_writeb(base_addr + (CyCAR << index),
3676 (u_char) channel);
3677 if (info->rtsdtr_inv) {
3678 cy_writeb(base_addr + (CyMSVR2 << index),
3679 ~CyDTR);
3680 } else {
3681 cy_writeb(base_addr + (CyMSVR1 << index),
3682 ~CyRTS);
3683 }
3684 spin_unlock_irqrestore(&card->card_lock, flags);
3685 }
3686 if (set & TIOCM_DTR) {
3687 spin_lock_irqsave(&card->card_lock, flags);
3688 cy_writeb(base_addr + (CyCAR << index),
3689 (u_char) channel);
3690 if (info->rtsdtr_inv) {
3691 cy_writeb(base_addr + (CyMSVR1 << index),
3692 CyRTS);
3693 } else {
3694 cy_writeb(base_addr + (CyMSVR2 << index),
3695 CyDTR);
3696 }
3697 #ifdef CY_DEBUG_DTR
3698 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3699 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3700 readb(base_addr + (CyMSVR1 << index)),
3701 readb(base_addr + (CyMSVR2 << index)));
3702 #endif
3703 spin_unlock_irqrestore(&card->card_lock, flags);
3704 }
3705 if (clear & TIOCM_DTR) {
3706 spin_lock_irqsave(&card->card_lock, flags);
3707 cy_writeb(base_addr + (CyCAR << index),
3708 (u_char) channel);
3709 if (info->rtsdtr_inv) {
3710 cy_writeb(base_addr + (CyMSVR1 << index),
3711 ~CyRTS);
3712 } else {
3713 cy_writeb(base_addr + (CyMSVR2 << index),
3714 ~CyDTR);
3715 }
3716
3717 #ifdef CY_DEBUG_DTR
3718 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3719 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3720 readb(base_addr + (CyMSVR1 << index)),
3721 readb(base_addr + (CyMSVR2 << index)));
3722 #endif
3723 spin_unlock_irqrestore(&card->card_lock, flags);
3724 }
3725 } else {
3726 base_addr = card->base_addr;
3727
3728 firm_id = card->base_addr + ID_ADDRESS;
3729 if (ISZLOADED(*card)) {
3730 zfw_ctrl = card->base_addr +
3731 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3732 board_ctrl = &zfw_ctrl->board_ctrl;
3733 ch_ctrl = zfw_ctrl->ch_ctrl;
3734
3735 if (set & TIOCM_RTS) {
3736 spin_lock_irqsave(&card->card_lock, flags);
3737 cy_writel(&ch_ctrl[channel].rs_control,
3738 readl(&ch_ctrl[channel].rs_control) |
3739 C_RS_RTS);
3740 spin_unlock_irqrestore(&card->card_lock, flags);
3741 }
3742 if (clear & TIOCM_RTS) {
3743 spin_lock_irqsave(&card->card_lock, flags);
3744 cy_writel(&ch_ctrl[channel].rs_control,
3745 readl(&ch_ctrl[channel].rs_control) &
3746 ~C_RS_RTS);
3747 spin_unlock_irqrestore(&card->card_lock, flags);
3748 }
3749 if (set & TIOCM_DTR) {
3750 spin_lock_irqsave(&card->card_lock, flags);
3751 cy_writel(&ch_ctrl[channel].rs_control,
3752 readl(&ch_ctrl[channel].rs_control) |
3753 C_RS_DTR);
3754 #ifdef CY_DEBUG_DTR
3755 printk(KERN_DEBUG "cyc:set_modem_info raising "
3756 "Z DTR\n");
3757 #endif
3758 spin_unlock_irqrestore(&card->card_lock, flags);
3759 }
3760 if (clear & TIOCM_DTR) {
3761 spin_lock_irqsave(&card->card_lock, flags);
3762 cy_writel(&ch_ctrl[channel].rs_control,
3763 readl(&ch_ctrl[channel].rs_control) &
3764 ~C_RS_DTR);
3765 #ifdef CY_DEBUG_DTR
3766 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3767 "Z DTR\n");
3768 #endif
3769 spin_unlock_irqrestore(&card->card_lock, flags);
3770 }
3771 } else {
3772 return -ENODEV;
3773 }
3774 spin_lock_irqsave(&card->card_lock, flags);
3775 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3776 if (retval != 0) {
3777 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3778 "was %x\n", info->line, retval);
3779 }
3780 spin_unlock_irqrestore(&card->card_lock, flags);
3781 }
3782 return 0;
3783 } /* cy_tiocmset */
3784
3785 /*
3786 * cy_break() --- routine which turns the break handling on or off
3787 */
3788 static void cy_break(struct tty_struct *tty, int break_state)
3789 {
3790 struct cyclades_port *info = tty->driver_data;
3791 struct cyclades_card *card;
3792 unsigned long flags;
3793
3794 if (serial_paranoia_check(info, tty->name, "cy_break"))
3795 return;
3796
3797 card = info->card;
3798
3799 spin_lock_irqsave(&card->card_lock, flags);
3800 if (!IS_CYC_Z(*card)) {
3801 /* Let the transmit ISR take care of this (since it
3802 requires stuffing characters into the output stream).
3803 */
3804 if (break_state == -1) {
3805 if (!info->breakon) {
3806 info->breakon = 1;
3807 if (!info->xmit_cnt) {
3808 spin_unlock_irqrestore(&card->card_lock, flags);
3809 start_xmit(info);
3810 spin_lock_irqsave(&card->card_lock, flags);
3811 }
3812 }
3813 } else {
3814 if (!info->breakoff) {
3815 info->breakoff = 1;
3816 if (!info->xmit_cnt) {
3817 spin_unlock_irqrestore(&card->card_lock, flags);
3818 start_xmit(info);
3819 spin_lock_irqsave(&card->card_lock, flags);
3820 }
3821 }
3822 }
3823 } else {
3824 int retval;
3825
3826 if (break_state == -1) {
3827 retval = cyz_issue_cmd(card,
3828 info->line - card->first_line,
3829 C_CM_SET_BREAK, 0L);
3830 if (retval != 0) {
3831 printk(KERN_ERR "cyc:cy_break (set) retval on "
3832 "ttyC%d was %x\n", info->line, retval);
3833 }
3834 } else {
3835 retval = cyz_issue_cmd(card,
3836 info->line - card->first_line,
3837 C_CM_CLR_BREAK, 0L);
3838 if (retval != 0) {
3839 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3840 "on ttyC%d was %x\n", info->line,
3841 retval);
3842 }
3843 }
3844 }
3845 spin_unlock_irqrestore(&card->card_lock, flags);
3846 } /* cy_break */
3847
3848 static int
3849 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3850 {
3851
3852 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3853 return -EFAULT;
3854 info->mon.int_count = 0;
3855 info->mon.char_count = 0;
3856 info->mon.char_max = 0;
3857 info->mon.char_last = 0;
3858 return 0;
3859 } /* get_mon_info */
3860
3861 static int set_threshold(struct cyclades_port *info, unsigned long value)
3862 {
3863 struct cyclades_card *card;
3864 void __iomem *base_addr;
3865 int channel, chip, index;
3866 unsigned long flags;
3867
3868 card = info->card;
3869 channel = info->line - card->first_line;
3870 if (!IS_CYC_Z(*card)) {
3871 chip = channel >> 2;
3872 channel &= 0x03;
3873 index = card->bus_index;
3874 base_addr =
3875 card->base_addr + (cy_chip_offset[chip] << index);
3876
3877 info->cor3 &= ~CyREC_FIFO;
3878 info->cor3 |= value & CyREC_FIFO;
3879
3880 spin_lock_irqsave(&card->card_lock, flags);
3881 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3882 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3883 spin_unlock_irqrestore(&card->card_lock, flags);
3884 }
3885 return 0;
3886 } /* set_threshold */
3887
3888 static int
3889 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3890 {
3891 struct cyclades_card *card;
3892 void __iomem *base_addr;
3893 int channel, chip, index;
3894 unsigned long tmp;
3895
3896 card = info->card;
3897 channel = info->line - card->first_line;
3898 if (!IS_CYC_Z(*card)) {
3899 chip = channel >> 2;
3900 channel &= 0x03;
3901 index = card->bus_index;
3902 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3903
3904 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3905 return put_user(tmp, value);
3906 }
3907 return 0;
3908 } /* get_threshold */
3909
3910 static int
3911 set_default_threshold(struct cyclades_port *info, unsigned long value)
3912 {
3913 info->default_threshold = value & 0x0f;
3914 return 0;
3915 } /* set_default_threshold */
3916
3917 static int
3918 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3919 {
3920 return put_user(info->default_threshold, value);
3921 } /* get_default_threshold */
3922
3923 static int set_timeout(struct cyclades_port *info, unsigned long value)
3924 {
3925 struct cyclades_card *card;
3926 void __iomem *base_addr;
3927 int channel, chip, index;
3928 unsigned long flags;
3929
3930 card = info->card;
3931 channel = info->line - card->first_line;
3932 if (!IS_CYC_Z(*card)) {
3933 chip = channel >> 2;
3934 channel &= 0x03;
3935 index = card->bus_index;
3936 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3937
3938 spin_lock_irqsave(&card->card_lock, flags);
3939 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3940 spin_unlock_irqrestore(&card->card_lock, flags);
3941 }
3942 return 0;
3943 } /* set_timeout */
3944
3945 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3946 {
3947 struct cyclades_card *card;
3948 void __iomem *base_addr;
3949 int channel, chip, index;
3950 unsigned long tmp;
3951
3952 card = info->card;
3953 channel = info->line - card->first_line;
3954 if (!IS_CYC_Z(*card)) {
3955 chip = channel >> 2;
3956 channel &= 0x03;
3957 index = card->bus_index;
3958 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3959
3960 tmp = readb(base_addr + (CyRTPR << index));
3961 return put_user(tmp, value);
3962 }
3963 return 0;
3964 } /* get_timeout */
3965
3966 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3967 {
3968 info->default_timeout = value & 0xff;
3969 return 0;
3970 } /* set_default_timeout */
3971
3972 static int
3973 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3974 {
3975 return put_user(info->default_timeout, value);
3976 } /* get_default_timeout */
3977
3978 /*
3979 * This routine allows the tty driver to implement device-
3980 * specific ioctl's. If the ioctl number passed in cmd is
3981 * not recognized by the driver, it should return ENOIOCTLCMD.
3982 */
3983 static int
3984 cy_ioctl(struct tty_struct *tty, struct file *file,
3985 unsigned int cmd, unsigned long arg)
3986 {
3987 struct cyclades_port *info = tty->driver_data;
3988 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3989 struct serial_icounter_struct __user *p_cuser; /* user space */
3990 int ret_val = 0;
3991 unsigned long flags;
3992 void __user *argp = (void __user *)arg;
3993
3994 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3995 return -ENODEV;
3996
3997 #ifdef CY_DEBUG_OTHER
3998 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3999 info->line, cmd, arg);
4000 #endif
4001
4002 switch (cmd) {
4003 case CYGETMON:
4004 ret_val = get_mon_info(info, argp);
4005 break;
4006 case CYGETTHRESH:
4007 ret_val = get_threshold(info, argp);
4008 break;
4009 case CYSETTHRESH:
4010 ret_val = set_threshold(info, arg);
4011 break;
4012 case CYGETDEFTHRESH:
4013 ret_val = get_default_threshold(info, argp);
4014 break;
4015 case CYSETDEFTHRESH:
4016 ret_val = set_default_threshold(info, arg);
4017 break;
4018 case CYGETTIMEOUT:
4019 ret_val = get_timeout(info, argp);
4020 break;
4021 case CYSETTIMEOUT:
4022 ret_val = set_timeout(info, arg);
4023 break;
4024 case CYGETDEFTIMEOUT:
4025 ret_val = get_default_timeout(info, argp);
4026 break;
4027 case CYSETDEFTIMEOUT:
4028 ret_val = set_default_timeout(info, arg);
4029 break;
4030 case CYSETRFLOW:
4031 info->rflow = (int)arg;
4032 ret_val = 0;
4033 break;
4034 case CYGETRFLOW:
4035 ret_val = info->rflow;
4036 break;
4037 case CYSETRTSDTR_INV:
4038 info->rtsdtr_inv = (int)arg;
4039 ret_val = 0;
4040 break;
4041 case CYGETRTSDTR_INV:
4042 ret_val = info->rtsdtr_inv;
4043 break;
4044 case CYGETCD1400VER:
4045 ret_val = info->chip_rev;
4046 break;
4047 #ifndef CONFIG_CYZ_INTR
4048 case CYZSETPOLLCYCLE:
4049 cyz_polling_cycle = (arg * HZ) / 1000;
4050 ret_val = 0;
4051 break;
4052 case CYZGETPOLLCYCLE:
4053 ret_val = (cyz_polling_cycle * 1000) / HZ;
4054 break;
4055 #endif /* CONFIG_CYZ_INTR */
4056 case CYSETWAIT:
4057 info->closing_wait = (unsigned short)arg *HZ / 100;
4058 ret_val = 0;
4059 break;
4060 case CYGETWAIT:
4061 ret_val = info->closing_wait / (HZ / 100);
4062 break;
4063 case TIOCGSERIAL:
4064 ret_val = get_serial_info(info, argp);
4065 break;
4066 case TIOCSSERIAL:
4067 ret_val = set_serial_info(info, argp);
4068 break;
4069 case TIOCSERGETLSR: /* Get line status register */
4070 ret_val = get_lsr_info(info, argp);
4071 break;
4072 /*
4073 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4074 * - mask passed in arg for lines of interest
4075 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4076 * Caller should use TIOCGICOUNT to see which one it was
4077 */
4078 case TIOCMIWAIT:
4079 spin_lock_irqsave(&info->card->card_lock, flags);
4080 /* note the counters on entry */
4081 cnow = info->icount;
4082 spin_unlock_irqrestore(&info->card->card_lock, flags);
4083 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4084 cprev = cnow;
4085 spin_lock_irqsave(&info->card->card_lock, flags);
4086 cnow = info->icount; /* atomic copy */
4087 spin_unlock_irqrestore(&info->card->card_lock, flags);
4088
4089 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4090 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4091 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4092 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4093 }));
4094 break;
4095
4096 /*
4097 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4098 * Return: write counters to the user passed counter struct
4099 * NB: both 1->0 and 0->1 transitions are counted except for
4100 * RI where only 0->1 is counted.
4101 */
4102 case TIOCGICOUNT:
4103 spin_lock_irqsave(&info->card->card_lock, flags);
4104 cnow = info->icount;
4105 spin_unlock_irqrestore(&info->card->card_lock, flags);
4106 p_cuser = argp;
4107 ret_val = put_user(cnow.cts, &p_cuser->cts);
4108 if (ret_val)
4109 return ret_val;
4110 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4111 if (ret_val)
4112 return ret_val;
4113 ret_val = put_user(cnow.rng, &p_cuser->rng);
4114 if (ret_val)
4115 return ret_val;
4116 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4117 if (ret_val)
4118 return ret_val;
4119 ret_val = put_user(cnow.rx, &p_cuser->rx);
4120 if (ret_val)
4121 return ret_val;
4122 ret_val = put_user(cnow.tx, &p_cuser->tx);
4123 if (ret_val)
4124 return ret_val;
4125 ret_val = put_user(cnow.frame, &p_cuser->frame);
4126 if (ret_val)
4127 return ret_val;
4128 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4129 if (ret_val)
4130 return ret_val;
4131 ret_val = put_user(cnow.parity, &p_cuser->parity);
4132 if (ret_val)
4133 return ret_val;
4134 ret_val = put_user(cnow.brk, &p_cuser->brk);
4135 if (ret_val)
4136 return ret_val;
4137 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4138 if (ret_val)
4139 return ret_val;
4140 ret_val = 0;
4141 break;
4142 default:
4143 ret_val = -ENOIOCTLCMD;
4144 }
4145
4146 #ifdef CY_DEBUG_OTHER
4147 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4148 #endif
4149
4150 return ret_val;
4151 } /* cy_ioctl */
4152
4153 /*
4154 * This routine allows the tty driver to be notified when
4155 * device's termios settings have changed. Note that a
4156 * well-designed tty driver should be prepared to accept the case
4157 * where old == NULL, and try to do something rational.
4158 */
4159 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4160 {
4161 struct cyclades_port *info = tty->driver_data;
4162
4163 #ifdef CY_DEBUG_OTHER
4164 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4165 #endif
4166
4167 set_line_char(info);
4168
4169 if ((old_termios->c_cflag & CRTSCTS) &&
4170 !(tty->termios->c_cflag & CRTSCTS)) {
4171 tty->hw_stopped = 0;
4172 cy_start(tty);
4173 }
4174 #if 0
4175 /*
4176 * No need to wake up processes in open wait, since they
4177 * sample the CLOCAL flag once, and don't recheck it.
4178 * XXX It's not clear whether the current behavior is correct
4179 * or not. Hence, this may change.....
4180 */
4181 if (!(old_termios->c_cflag & CLOCAL) &&
4182 (tty->termios->c_cflag & CLOCAL))
4183 wake_up_interruptible(&info->open_wait);
4184 #endif
4185 } /* cy_set_termios */
4186
4187 /* This function is used to send a high-priority XON/XOFF character to
4188 the device.
4189 */
4190 static void cy_send_xchar(struct tty_struct *tty, char ch)
4191 {
4192 struct cyclades_port *info = tty->driver_data;
4193 struct cyclades_card *card;
4194 int channel;
4195
4196 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4197 return;
4198
4199 info->x_char = ch;
4200
4201 if (ch)
4202 cy_start(tty);
4203
4204 card = info->card;
4205 channel = info->line - card->first_line;
4206
4207 if (IS_CYC_Z(*card)) {
4208 if (ch == STOP_CHAR(tty))
4209 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4210 else if (ch == START_CHAR(tty))
4211 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4212 }
4213 }
4214
4215 /* This routine is called by the upper-layer tty layer to signal
4216 that incoming characters should be throttled because the input
4217 buffers are close to full.
4218 */
4219 static void cy_throttle(struct tty_struct *tty)
4220 {
4221 struct cyclades_port *info = tty->driver_data;
4222 struct cyclades_card *card;
4223 unsigned long flags;
4224 void __iomem *base_addr;
4225 int chip, channel, index;
4226
4227 #ifdef CY_DEBUG_THROTTLE
4228 char buf[64];
4229
4230 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4231 tty->ldisc.chars_in_buffer(tty), info->line);
4232 #endif
4233
4234 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4235 return;
4236 }
4237
4238 card = info->card;
4239
4240 if (I_IXOFF(tty)) {
4241 if (!IS_CYC_Z(*card))
4242 cy_send_xchar(tty, STOP_CHAR(tty));
4243 else
4244 info->throttle = 1;
4245 }
4246
4247 if (tty->termios->c_cflag & CRTSCTS) {
4248 channel = info->line - card->first_line;
4249 if (!IS_CYC_Z(*card)) {
4250 chip = channel >> 2;
4251 channel &= 0x03;
4252 index = card->bus_index;
4253 base_addr = card->base_addr +
4254 (cy_chip_offset[chip] << index);
4255
4256 spin_lock_irqsave(&card->card_lock, flags);
4257 cy_writeb(base_addr + (CyCAR << index),
4258 (u_char) channel);
4259 if (info->rtsdtr_inv) {
4260 cy_writeb(base_addr + (CyMSVR2 << index),
4261 ~CyDTR);
4262 } else {
4263 cy_writeb(base_addr + (CyMSVR1 << index),
4264 ~CyRTS);
4265 }
4266 spin_unlock_irqrestore(&card->card_lock, flags);
4267 } else {
4268 info->throttle = 1;
4269 }
4270 }
4271 } /* cy_throttle */
4272
4273 /*
4274 * This routine notifies the tty driver that it should signal
4275 * that characters can now be sent to the tty without fear of
4276 * overrunning the input buffers of the line disciplines.
4277 */
4278 static void cy_unthrottle(struct tty_struct *tty)
4279 {
4280 struct cyclades_port *info = tty->driver_data;
4281 struct cyclades_card *card;
4282 unsigned long flags;
4283 void __iomem *base_addr;
4284 int chip, channel, index;
4285
4286 #ifdef CY_DEBUG_THROTTLE
4287 char buf[64];
4288
4289 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4290 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
4291 #endif
4292
4293 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4294 return;
4295 }
4296
4297 if (I_IXOFF(tty)) {
4298 if (info->x_char)
4299 info->x_char = 0;
4300 else
4301 cy_send_xchar(tty, START_CHAR(tty));
4302 }
4303
4304 if (tty->termios->c_cflag & CRTSCTS) {
4305 card = info->card;
4306 channel = info->line - card->first_line;
4307 if (!IS_CYC_Z(*card)) {
4308 chip = channel >> 2;
4309 channel &= 0x03;
4310 index = card->bus_index;
4311 base_addr = card->base_addr +
4312 (cy_chip_offset[chip] << index);
4313
4314 spin_lock_irqsave(&card->card_lock, flags);
4315 cy_writeb(base_addr + (CyCAR << index),
4316 (u_char) channel);
4317 if (info->rtsdtr_inv) {
4318 cy_writeb(base_addr + (CyMSVR2 << index),
4319 CyDTR);
4320 } else {
4321 cy_writeb(base_addr + (CyMSVR1 << index),
4322 CyRTS);
4323 }
4324 spin_unlock_irqrestore(&card->card_lock, flags);
4325 } else {
4326 info->throttle = 0;
4327 }
4328 }
4329 } /* cy_unthrottle */
4330
4331 /* cy_start and cy_stop provide software output flow control as a
4332 function of XON/XOFF, software CTS, and other such stuff.
4333 */
4334 static void cy_stop(struct tty_struct *tty)
4335 {
4336 struct cyclades_card *cinfo;
4337 struct cyclades_port *info = tty->driver_data;
4338 void __iomem *base_addr;
4339 int chip, channel, index;
4340 unsigned long flags;
4341
4342 #ifdef CY_DEBUG_OTHER
4343 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4344 #endif
4345
4346 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4347 return;
4348
4349 cinfo = info->card;
4350 channel = info->line - cinfo->first_line;
4351 if (!IS_CYC_Z(*cinfo)) {
4352 index = cinfo->bus_index;
4353 chip = channel >> 2;
4354 channel &= 0x03;
4355 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4356
4357 spin_lock_irqsave(&cinfo->card_lock, flags);
4358 cy_writeb(base_addr + (CyCAR << index),
4359 (u_char)(channel & 0x0003)); /* index channel */
4360 cy_writeb(base_addr + (CySRER << index),
4361 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4362 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4363 }
4364 } /* cy_stop */
4365
4366 static void cy_start(struct tty_struct *tty)
4367 {
4368 struct cyclades_card *cinfo;
4369 struct cyclades_port *info = tty->driver_data;
4370 void __iomem *base_addr;
4371 int chip, channel, index;
4372 unsigned long flags;
4373
4374 #ifdef CY_DEBUG_OTHER
4375 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4376 #endif
4377
4378 if (serial_paranoia_check(info, tty->name, "cy_start"))
4379 return;
4380
4381 cinfo = info->card;
4382 channel = info->line - cinfo->first_line;
4383 index = cinfo->bus_index;
4384 if (!IS_CYC_Z(*cinfo)) {
4385 chip = channel >> 2;
4386 channel &= 0x03;
4387 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4388
4389 spin_lock_irqsave(&cinfo->card_lock, flags);
4390 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4391 cy_writeb(base_addr + (CySRER << index),
4392 readb(base_addr + (CySRER << index)) | CyTxRdy);
4393 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4394 }
4395 } /* cy_start */
4396
4397 static void cy_flush_buffer(struct tty_struct *tty)
4398 {
4399 struct cyclades_port *info = tty->driver_data;
4400 struct cyclades_card *card;
4401 int channel, retval;
4402 unsigned long flags;
4403
4404 #ifdef CY_DEBUG_IO
4405 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4406 #endif
4407
4408 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4409 return;
4410
4411 card = info->card;
4412 channel = info->line - card->first_line;
4413
4414 spin_lock_irqsave(&card->card_lock, flags);
4415 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4416 spin_unlock_irqrestore(&card->card_lock, flags);
4417
4418 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
4419 buffers as well */
4420 spin_lock_irqsave(&card->card_lock, flags);
4421 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4422 if (retval != 0) {
4423 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4424 "was %x\n", info->line, retval);
4425 }
4426 spin_unlock_irqrestore(&card->card_lock, flags);
4427 }
4428 tty_wakeup(tty);
4429 } /* cy_flush_buffer */
4430
4431 /*
4432 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4433 */
4434 static void cy_hangup(struct tty_struct *tty)
4435 {
4436 struct cyclades_port *info = tty->driver_data;
4437
4438 #ifdef CY_DEBUG_OTHER
4439 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4440 #endif
4441
4442 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4443 return;
4444
4445 cy_flush_buffer(tty);
4446 shutdown(info);
4447 info->event = 0;
4448 info->count = 0;
4449 #ifdef CY_DEBUG_COUNT
4450 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4451 current->pid);
4452 #endif
4453 info->tty = NULL;
4454 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4455 wake_up_interruptible(&info->open_wait);
4456 } /* cy_hangup */
4457
4458 /*
4459 * ---------------------------------------------------------------------
4460 * cy_init() and friends
4461 *
4462 * cy_init() is called at boot-time to initialize the serial driver.
4463 * ---------------------------------------------------------------------
4464 */
4465
4466 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4467 {
4468 struct cyclades_port *info;
4469 u32 mailbox;
4470 unsigned int nports;
4471 unsigned short chip_number;
4472 int index, port;
4473
4474 spin_lock_init(&cinfo->card_lock);
4475
4476 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4477 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4478 cinfo->ctl_addr)->mail_box_0);
4479 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4480 cinfo->intr_enabled = 0;
4481 cinfo->nports = 0; /* Will be correctly set later, after
4482 Z FW is loaded */
4483 } else {
4484 index = cinfo->bus_index;
4485 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4486 }
4487
4488 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4489 if (cinfo->ports == NULL) {
4490 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4491 cinfo->nports = 0;
4492 return -ENOMEM;
4493 }
4494
4495 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4496 port++) {
4497 info = &cinfo->ports[port - cinfo->first_line];
4498 info->magic = CYCLADES_MAGIC;
4499 info->card = cinfo;
4500 info->line = port;
4501 info->flags = STD_COM_FLAGS;
4502 info->closing_wait = CLOSING_WAIT_DELAY;
4503 info->close_delay = 5 * HZ / 10;
4504
4505 INIT_WORK(&info->tqueue, do_softint);
4506 init_waitqueue_head(&info->open_wait);
4507 init_waitqueue_head(&info->close_wait);
4508 init_completion(&info->shutdown_wait);
4509 init_waitqueue_head(&info->delta_msr_wait);
4510
4511 if (IS_CYC_Z(*cinfo)) {
4512 info->type = PORT_STARTECH;
4513 if (mailbox == ZO_V1)
4514 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4515 else
4516 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4517 #ifdef CONFIG_CYZ_INTR
4518 setup_timer(&cyz_rx_full_timer[port],
4519 cyz_rx_restart, (unsigned long)info);
4520 #endif
4521 } else {
4522 info->type = PORT_CIRRUS;
4523 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4524 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4525 info->cor2 = CyETC;
4526 info->cor3 = 0x08; /* _very_ small rcv threshold */
4527
4528 chip_number = (port - cinfo->first_line) / 4;
4529 if ((info->chip_rev = readb(cinfo->base_addr +
4530 (cy_chip_offset[chip_number] <<
4531 index) + (CyGFRCR << index))) >=
4532 CD1400_REV_J) {
4533 /* It is a CD1400 rev. J or later */
4534 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4535 info->tco = baud_co_60[13]; /* Tx CO */
4536 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4537 info->rco = baud_co_60[13]; /* Rx CO */
4538 info->rtsdtr_inv = 1;
4539 } else {
4540 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4541 info->tco = baud_co_25[13]; /* Tx CO */
4542 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4543 info->rco = baud_co_25[13]; /* Rx CO */
4544 info->rtsdtr_inv = 0;
4545 }
4546 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4547 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4548 }
4549
4550 }
4551
4552 #ifndef CONFIG_CYZ_INTR
4553 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4554 mod_timer(&cyz_timerlist, jiffies + 1);
4555 #ifdef CY_PCI_DEBUG
4556 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4557 #endif
4558 }
4559 #endif
4560 return 0;
4561 }
4562
4563 /* initialize chips on Cyclom-Y card -- return number of valid
4564 chips (which is number of ports/4) */
4565 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4566 int index)
4567 {
4568 unsigned int chip_number;
4569 void __iomem *base_addr;
4570
4571 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4572 /* Cy_HwReset is 0x1400 */
4573 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4574 /* Cy_ClrIntr is 0x1800 */
4575 udelay(500L);
4576
4577 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4578 base_addr =
4579 true_base_addr + (cy_chip_offset[chip_number] << index);
4580 mdelay(1);
4581 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4582 /*************
4583 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4584 chip_number, (unsigned long)base_addr);
4585 *************/
4586 return chip_number;
4587 }
4588
4589 cy_writeb(base_addr + (CyGFRCR << index), 0);
4590 udelay(10L);
4591
4592 /* The Cyclom-16Y does not decode address bit 9 and therefore
4593 cannot distinguish between references to chip 0 and a non-
4594 existent chip 4. If the preceding clearing of the supposed
4595 chip 4 GFRCR register appears at chip 0, there is no chip 4
4596 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4597 */
4598 if (chip_number == 4 && readb(true_base_addr +
4599 (cy_chip_offset[0] << index) +
4600 (CyGFRCR << index)) == 0) {
4601 return chip_number;
4602 }
4603
4604 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4605 mdelay(1);
4606
4607 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4608 /*
4609 printk(" chip #%d at %#6lx is not responding ",
4610 chip_number, (unsigned long)base_addr);
4611 printk("(GFRCR stayed 0)\n",
4612 */
4613 return chip_number;
4614 }
4615 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4616 0x40) {
4617 /*
4618 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4619 "%#2x)\n",
4620 chip_number, (unsigned long)base_addr,
4621 base_addr[CyGFRCR<<index]);
4622 */
4623 return chip_number;
4624 }
4625 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4626 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4627 /* It is a CD1400 rev. J or later */
4628 /* Impossible to reach 5ms with this chip.
4629 Changed to 2ms instead (f = 500 Hz). */
4630 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4631 } else {
4632 /* f = 200 Hz */
4633 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4634 }
4635
4636 /*
4637 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4638 chip_number, (unsigned long)base_addr,
4639 readb(base_addr+(CyGFRCR<<index)));
4640 */
4641 }
4642 return chip_number;
4643 } /* cyy_init_card */
4644
4645 /*
4646 * ---------------------------------------------------------------------
4647 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4648 * sets global variables and return the number of ISA boards found.
4649 * ---------------------------------------------------------------------
4650 */
4651 static int __init cy_detect_isa(void)
4652 {
4653 #ifdef CONFIG_ISA
4654 unsigned short cy_isa_irq, nboard;
4655 void __iomem *cy_isa_address;
4656 unsigned short i, j, cy_isa_nchan;
4657 #ifdef MODULE
4658 int isparam = 0;
4659 #endif
4660
4661 nboard = 0;
4662
4663 #ifdef MODULE
4664 /* Check for module parameters */
4665 for (i = 0; i < NR_CARDS; i++) {
4666 if (maddr[i] || i) {
4667 isparam = 1;
4668 cy_isa_addresses[i] = maddr[i];
4669 }
4670 if (!maddr[i])
4671 break;
4672 }
4673 #endif
4674
4675 /* scan the address table probing for Cyclom-Y/ISA boards */
4676 for (i = 0; i < NR_ISA_ADDRS; i++) {
4677 unsigned int isa_address = cy_isa_addresses[i];
4678 if (isa_address == 0x0000) {
4679 return nboard;
4680 }
4681
4682 /* probe for CD1400... */
4683 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4684 if (cy_isa_address == NULL) {
4685 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4686 "address\n");
4687 continue;
4688 }
4689 cy_isa_nchan = CyPORTS_PER_CHIP *
4690 cyy_init_card(cy_isa_address, 0);
4691 if (cy_isa_nchan == 0) {
4692 iounmap(cy_isa_address);
4693 continue;
4694 }
4695 #ifdef MODULE
4696 if (isparam && irq[i])
4697 cy_isa_irq = irq[i];
4698 else
4699 #endif
4700 /* find out the board's irq by probing */
4701 cy_isa_irq = detect_isa_irq(cy_isa_address);
4702 if (cy_isa_irq == 0) {
4703 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4704 "IRQ could not be detected.\n",
4705 (unsigned long)cy_isa_address);
4706 iounmap(cy_isa_address);
4707 continue;
4708 }
4709
4710 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4711 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4712 "more channels are available. Change NR_PORTS "
4713 "in cyclades.c and recompile kernel.\n",
4714 (unsigned long)cy_isa_address);
4715 iounmap(cy_isa_address);
4716 return nboard;
4717 }
4718 /* fill the next cy_card structure available */
4719 for (j = 0; j < NR_CARDS; j++) {
4720 if (cy_card[j].base_addr == NULL)
4721 break;
4722 }
4723 if (j == NR_CARDS) { /* no more cy_cards available */
4724 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4725 "more cards can be used. Change NR_CARDS in "
4726 "cyclades.c and recompile kernel.\n",
4727 (unsigned long)cy_isa_address);
4728 iounmap(cy_isa_address);
4729 return nboard;
4730 }
4731
4732 /* allocate IRQ */
4733 if (request_irq(cy_isa_irq, cyy_interrupt,
4734 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4735 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4736 "could not allocate IRQ#%d.\n",
4737 (unsigned long)cy_isa_address, cy_isa_irq);
4738 iounmap(cy_isa_address);
4739 return nboard;
4740 }
4741
4742 /* set cy_card */
4743 cy_card[j].base_addr = cy_isa_address;
4744 cy_card[j].ctl_addr = NULL;
4745 cy_card[j].irq = (int)cy_isa_irq;
4746 cy_card[j].bus_index = 0;
4747 cy_card[j].first_line = cy_next_channel;
4748 cy_card[j].num_chips = cy_isa_nchan / 4;
4749 if (cy_init_card(&cy_card[j])) {
4750 cy_card[j].base_addr = NULL;
4751 free_irq(cy_isa_irq, &cy_card[j]);
4752 iounmap(cy_isa_address);
4753 continue;
4754 }
4755 nboard++;
4756
4757 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4758 "%d channels starting from port %d\n",
4759 j + 1, (unsigned long)cy_isa_address,
4760 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4761 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4762
4763 for (j = cy_next_channel;
4764 j < cy_next_channel + cy_isa_nchan; j++)
4765 tty_register_device(cy_serial_driver, j, NULL);
4766 cy_next_channel += cy_isa_nchan;
4767 }
4768 return nboard;
4769 #else
4770 return 0;
4771 #endif /* CONFIG_ISA */
4772 } /* cy_detect_isa */
4773
4774 #ifdef CONFIG_PCI
4775 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4776 {
4777 unsigned int a;
4778
4779 for (a = 0; a < size && *str; a++, str++)
4780 if (*str & 0x80)
4781 return -EINVAL;
4782
4783 for (; a < size; a++, str++)
4784 if (*str)
4785 return -EINVAL;
4786
4787 return 0;
4788 }
4789
4790 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, u8 *data,
4791 unsigned int size)
4792 {
4793 for (; size > 0; size--) {
4794 cy_writel(fpga, *data++);
4795 udelay(10);
4796 }
4797 }
4798
4799 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4800 struct RUNTIME_9060 __iomem *addr)
4801 {
4802 /* Reset PLX */
4803 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4804 udelay(100L);
4805 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4806
4807 /* Reload Config. Registers from EEPROM */
4808 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4809 udelay(100L);
4810 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4811
4812 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4813 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4814 * registers. This will remain here until we find a permanent fix.
4815 */
4816 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4817 }
4818
4819 static int __devinit __cyz_load_fw(const struct firmware *fw,
4820 const char *name, const u32 mailbox, void __iomem *base,
4821 void __iomem *fpga)
4822 {
4823 void *ptr = fw->data;
4824 struct zfile_header *h = ptr;
4825 struct zfile_config *c, *cs;
4826 struct zfile_block *b, *bs;
4827 unsigned int a, tmp, len = fw->size;
4828 #define BAD_FW KERN_ERR "Bad firmware: "
4829 if (len < sizeof(*h)) {
4830 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4831 return -EINVAL;
4832 }
4833
4834 cs = ptr + h->config_offset;
4835 bs = ptr + h->block_offset;
4836
4837 if ((void *)(cs + h->n_config) > ptr + len ||
4838 (void *)(bs + h->n_blocks) > ptr + len) {
4839 printk(BAD_FW "too short");
4840 return -EINVAL;
4841 }
4842
4843 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4844 cyc_isfwstr(h->date, sizeof(h->date))) {
4845 printk(BAD_FW "bad formatted header string\n");
4846 return -EINVAL;
4847 }
4848
4849 if (strncmp(name, h->name, sizeof(h->name))) {
4850 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4851 return -EINVAL;
4852 }
4853
4854 tmp = 0;
4855 for (c = cs; c < cs + h->n_config; c++) {
4856 for (a = 0; a < c->n_blocks; a++)
4857 if (c->block_list[a] > h->n_blocks) {
4858 printk(BAD_FW "bad block ref number in cfgs\n");
4859 return -EINVAL;
4860 }
4861 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4862 tmp++;
4863 }
4864 if (!tmp) {
4865 printk(BAD_FW "nothing appropriate\n");
4866 return -EINVAL;
4867 }
4868
4869 for (b = bs; b < bs + h->n_blocks; b++)
4870 if (b->file_offset + b->size > len) {
4871 printk(BAD_FW "bad block data offset\n");
4872 return -EINVAL;
4873 }
4874
4875 /* everything is OK, let's seek'n'load it */
4876 for (c = cs; c < cs + h->n_config; c++)
4877 if (c->mailbox == mailbox && c->function == 0)
4878 break;
4879
4880 for (a = 0; a < c->n_blocks; a++) {
4881 b = &bs[c->block_list[a]];
4882 if (b->type == ZBLOCK_FPGA) {
4883 if (fpga != NULL)
4884 cyz_fpga_copy(fpga, ptr + b->file_offset,
4885 b->size);
4886 } else {
4887 if (base != NULL)
4888 memcpy_toio(base + b->ram_offset,
4889 ptr + b->file_offset, b->size);
4890 }
4891 }
4892 #undef BAD_FW
4893 return 0;
4894 }
4895
4896 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4897 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4898 {
4899 const struct firmware *fw;
4900 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4901 struct CUSTOM_REG __iomem *cust = base_addr;
4902 struct ZFW_CTRL __iomem *pt_zfwctrl;
4903 void __iomem *tmp;
4904 u32 mailbox, status;
4905 unsigned int i;
4906 int retval;
4907
4908 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4909 if (retval) {
4910 dev_err(&pdev->dev, "can't get firmware\n");
4911 goto err;
4912 }
4913
4914 /* Check whether the firmware is already loaded and running. If
4915 positive, skip this board */
4916 if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4917 u32 cntval = readl(base_addr + 0x190);
4918
4919 udelay(100);
4920 if (cntval != readl(base_addr + 0x190)) {
4921 /* FW counter is working, FW is running */
4922 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4923 "Skipping board.\n");
4924 retval = 0;
4925 goto err_rel;
4926 }
4927 }
4928
4929 /* start boot */
4930 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4931 ~0x00030800UL);
4932
4933 mailbox = readl(&ctl_addr->mail_box_0);
4934
4935 if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4936 /* stops CPU and set window to beginning of RAM */
4937 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4938 cy_writel(&cust->cpu_stop, 0);
4939 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4940 udelay(100);
4941 }
4942
4943 plx_init(pdev, irq, ctl_addr);
4944
4945 if (mailbox != 0) {
4946 /* load FPGA */
4947 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4948 base_addr);
4949 if (retval)
4950 goto err_rel;
4951 if (!Z_FPGA_LOADED(ctl_addr)) {
4952 dev_err(&pdev->dev, "fw upload successful, but fw is "
4953 "not loaded\n");
4954 goto err_rel;
4955 }
4956 }
4957
4958 /* stops CPU and set window to beginning of RAM */
4959 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4960 cy_writel(&cust->cpu_stop, 0);
4961 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4962 udelay(100);
4963
4964 /* clear memory */
4965 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4966 cy_writeb(tmp, 255);
4967 if (mailbox != 0) {
4968 /* set window to last 512K of RAM */
4969 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4970 //sleep(1);
4971 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4972 cy_writeb(tmp, 255);
4973 /* set window to beginning of RAM */
4974 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4975 //sleep(1);
4976 }
4977
4978 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4979 release_firmware(fw);
4980 if (retval)
4981 goto err;
4982
4983 /* finish boot and start boards */
4984 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4985 cy_writel(&cust->cpu_start, 0);
4986 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4987 i = 0;
4988 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4989 msleep(100);
4990 if (status != ZFIRM_ID) {
4991 if (status == ZFIRM_HLT) {
4992 dev_err(&pdev->dev, "you need an external power supply "
4993 "for this number of ports. Firmware halted and "
4994 "board reset.\n");
4995 retval = -EIO;
4996 goto err;
4997 }
4998 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4999 "some more time\n", status);
5000 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
5001 i++ < 200)
5002 msleep(100);
5003 if (status != ZFIRM_ID) {
5004 dev_err(&pdev->dev, "Board not started in 20 seconds! "
5005 "Giving up. (fid->signature = 0x%x)\n",
5006 status);
5007 dev_info(&pdev->dev, "*** Warning ***: if you are "
5008 "upgrading the FW, please power cycle the "
5009 "system before loading the new FW to the "
5010 "Cyclades-Z.\n");
5011
5012 if (Z_FPGA_LOADED(ctl_addr))
5013 plx_init(pdev, irq, ctl_addr);
5014
5015 retval = -EIO;
5016 goto err;
5017 }
5018 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
5019 i / 10);
5020 }
5021 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
5022
5023 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
5024 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
5025 base_addr + readl(&fid->zfwctrl_addr));
5026
5027 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
5028 readl(&pt_zfwctrl->board_ctrl.fw_version),
5029 readl(&pt_zfwctrl->board_ctrl.n_channel));
5030
5031 if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
5032 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
5033 "check the connection between the Z host card and the "
5034 "serial expanders.\n");
5035
5036 if (Z_FPGA_LOADED(ctl_addr))
5037 plx_init(pdev, irq, ctl_addr);
5038
5039 dev_info(&pdev->dev, "Null number of ports detected. Board "
5040 "reset.\n");
5041 retval = 0;
5042 goto err;
5043 }
5044
5045 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
5046 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
5047
5048 /*
5049 Early firmware failed to start looking for commands.
5050 This enables firmware interrupts for those commands.
5051 */
5052 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
5053 (1 << 17));
5054 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
5055 0x00030800UL);
5056
5057 plx_init(pdev, irq, ctl_addr);
5058
5059 return 0;
5060 err_rel:
5061 release_firmware(fw);
5062 err:
5063 return retval;
5064 }
5065
5066 static int __devinit cy_pci_probe(struct pci_dev *pdev,
5067 const struct pci_device_id *ent)
5068 {
5069 void __iomem *addr0 = NULL, *addr2 = NULL;
5070 char *card_name = NULL;
5071 u32 mailbox;
5072 unsigned int device_id, nchan = 0, card_no, i;
5073 unsigned char plx_ver;
5074 int retval, irq;
5075
5076 retval = pci_enable_device(pdev);
5077 if (retval) {
5078 dev_err(&pdev->dev, "cannot enable device\n");
5079 goto err;
5080 }
5081
5082 /* read PCI configuration area */
5083 irq = pdev->irq;
5084 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
5085
5086 #if defined(__alpha__)
5087 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
5088 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
5089 "addresses on Alpha systems.\n");
5090 retval = -EIO;
5091 goto err_dis;
5092 }
5093 #endif
5094 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
5095 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
5096 "addresses\n");
5097 retval = -EIO;
5098 goto err_dis;
5099 }
5100
5101 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
5102 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
5103 "it...\n");
5104 pdev->resource[2].flags &= ~IORESOURCE_IO;
5105 }
5106
5107 retval = pci_request_regions(pdev, "cyclades");
5108 if (retval) {
5109 dev_err(&pdev->dev, "failed to reserve resources\n");
5110 goto err_dis;
5111 }
5112
5113 retval = -EIO;
5114 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5115 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5116 card_name = "Cyclom-Y";
5117
5118 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
5119 if (addr0 == NULL) {
5120 dev_err(&pdev->dev, "can't remap ctl region\n");
5121 goto err_reg;
5122 }
5123 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
5124 if (addr2 == NULL) {
5125 dev_err(&pdev->dev, "can't remap base region\n");
5126 goto err_unmap;
5127 }
5128
5129 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5130 if (nchan == 0) {
5131 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5132 "Serial-Modules\n");
5133 return -EIO;
5134 }
5135 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5136 struct RUNTIME_9060 __iomem *ctl_addr;
5137
5138 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5139 if (addr0 == NULL) {
5140 dev_err(&pdev->dev, "can't remap ctl region\n");
5141 goto err_reg;
5142 }
5143
5144 /* Disable interrupts on the PLX before resetting it */
5145 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
5146
5147 plx_init(pdev, irq, addr0);
5148
5149 mailbox = (u32)readl(&ctl_addr->mail_box_0);
5150
5151 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
5152 CyPCI_Ze_win : CyPCI_Zwin);
5153 if (addr2 == NULL) {
5154 dev_err(&pdev->dev, "can't remap base region\n");
5155 goto err_unmap;
5156 }
5157
5158 if (mailbox == ZE_V1) {
5159 card_name = "Cyclades-Ze";
5160
5161 readl(&ctl_addr->mail_box_0);
5162 nchan = ZE_V1_NPORTS;
5163 } else {
5164 card_name = "Cyclades-8Zo";
5165
5166 #ifdef CY_PCI_DEBUG
5167 if (mailbox == ZO_V1) {
5168 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5169 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5170 "id %lx, ver %lx\n", (ulong)(0xff &
5171 readl(&((struct CUSTOM_REG *)addr2)->
5172 fpga_id)), (ulong)(0xff &
5173 readl(&((struct CUSTOM_REG *)addr2)->
5174 fpga_version)));
5175 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5176 } else {
5177 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5178 "Cyclades-Z board. FPGA not loaded\n");
5179 }
5180 #endif
5181 /* The following clears the firmware id word. This
5182 ensures that the driver will not attempt to talk to
5183 the board until it has been properly initialized.
5184 */
5185 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5186 cy_writel(addr2 + ID_ADDRESS, 0L);
5187
5188 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5189 if (retval)
5190 goto err_unmap;
5191 /* This must be a Cyclades-8Zo/PCI. The extendable
5192 version will have a different device_id and will
5193 be allocated its maximum number of ports. */
5194 nchan = 8;
5195 }
5196 }
5197
5198 if ((cy_next_channel + nchan) > NR_PORTS) {
5199 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5200 "channels are available. Change NR_PORTS in "
5201 "cyclades.c and recompile kernel.\n");
5202 goto err_unmap;
5203 }
5204 /* fill the next cy_card structure available */
5205 for (card_no = 0; card_no < NR_CARDS; card_no++) {
5206 if (cy_card[card_no].base_addr == NULL)
5207 break;
5208 }
5209 if (card_no == NR_CARDS) { /* no more cy_cards available */
5210 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5211 "more cards can be used. Change NR_CARDS in "
5212 "cyclades.c and recompile kernel.\n");
5213 goto err_unmap;
5214 }
5215
5216 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5217 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5218 /* allocate IRQ */
5219 retval = request_irq(irq, cyy_interrupt,
5220 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5221 if (retval) {
5222 dev_err(&pdev->dev, "could not allocate IRQ\n");
5223 goto err_unmap;
5224 }
5225 cy_card[card_no].num_chips = nchan / 4;
5226 } else {
5227 #ifdef CONFIG_CYZ_INTR
5228 /* allocate IRQ only if board has an IRQ */
5229 if (irq != 0 && irq != 255) {
5230 retval = request_irq(irq, cyz_interrupt,
5231 IRQF_SHARED, "Cyclades-Z",
5232 &cy_card[card_no]);
5233 if (retval) {
5234 dev_err(&pdev->dev, "could not allocate IRQ\n");
5235 goto err_unmap;
5236 }
5237 }
5238 #endif /* CONFIG_CYZ_INTR */
5239 cy_card[card_no].num_chips = -1;
5240 }
5241
5242 /* set cy_card */
5243 cy_card[card_no].base_addr = addr2;
5244 cy_card[card_no].ctl_addr = addr0;
5245 cy_card[card_no].irq = irq;
5246 cy_card[card_no].bus_index = 1;
5247 cy_card[card_no].first_line = cy_next_channel;
5248 retval = cy_init_card(&cy_card[card_no]);
5249 if (retval)
5250 goto err_null;
5251
5252 pci_set_drvdata(pdev, &cy_card[card_no]);
5253
5254 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5255 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5256 /* enable interrupts in the PCI interface */
5257 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5258 switch (plx_ver) {
5259 case PLX_9050:
5260
5261 cy_writeb(addr0 + 0x4c, 0x43);
5262 break;
5263
5264 case PLX_9060:
5265 case PLX_9080:
5266 default: /* Old boards, use PLX_9060 */
5267 plx_init(pdev, irq, addr0);
5268 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
5269 break;
5270 }
5271 }
5272
5273 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5274 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5275 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5276 tty_register_device(cy_serial_driver, i, &pdev->dev);
5277 cy_next_channel += nchan;
5278
5279 return 0;
5280 err_null:
5281 cy_card[card_no].base_addr = NULL;
5282 free_irq(irq, &cy_card[card_no]);
5283 err_unmap:
5284 pci_iounmap(pdev, addr0);
5285 if (addr2)
5286 pci_iounmap(pdev, addr2);
5287 err_reg:
5288 pci_release_regions(pdev);
5289 err_dis:
5290 pci_disable_device(pdev);
5291 err:
5292 return retval;
5293 }
5294
5295 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5296 {
5297 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5298 unsigned int i;
5299
5300 /* non-Z with old PLX */
5301 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5302 PLX_9050)
5303 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5304 else
5305 #ifndef CONFIG_CYZ_INTR
5306 if (!IS_CYC_Z(*cinfo))
5307 #endif
5308 cy_writew(cinfo->ctl_addr + 0x68,
5309 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5310
5311 pci_iounmap(pdev, cinfo->base_addr);
5312 if (cinfo->ctl_addr)
5313 pci_iounmap(pdev, cinfo->ctl_addr);
5314 if (cinfo->irq
5315 #ifndef CONFIG_CYZ_INTR
5316 && !IS_CYC_Z(*cinfo)
5317 #endif /* CONFIG_CYZ_INTR */
5318 )
5319 free_irq(cinfo->irq, cinfo);
5320 pci_release_regions(pdev);
5321
5322 cinfo->base_addr = NULL;
5323 for (i = cinfo->first_line; i < cinfo->first_line +
5324 cinfo->nports; i++)
5325 tty_unregister_device(cy_serial_driver, i);
5326 cinfo->nports = 0;
5327 kfree(cinfo->ports);
5328 }
5329
5330 static struct pci_driver cy_pci_driver = {
5331 .name = "cyclades",
5332 .id_table = cy_pci_dev_id,
5333 .probe = cy_pci_probe,
5334 .remove = __devexit_p(cy_pci_remove)
5335 };
5336 #endif
5337
5338 static int
5339 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5340 int *eof, void *data)
5341 {
5342 struct cyclades_port *info;
5343 unsigned int i, j;
5344 int len = 0;
5345 off_t begin = 0;
5346 off_t pos = 0;
5347 int size;
5348 __u32 cur_jifs = jiffies;
5349
5350 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5351 "IdleIn Overruns Ldisc\n");
5352
5353 pos += size;
5354 len += size;
5355
5356 /* Output one line for each known port */
5357 for (i = 0; i < NR_CARDS; i++)
5358 for (j = 0; j < cy_card[i].nports; j++) {
5359 info = &cy_card[i].ports[j];
5360
5361 if (info->count)
5362 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5363 "%10lu %8lu %9lu %6ld\n", info->line,
5364 (cur_jifs - info->idle_stats.in_use) /
5365 HZ, info->idle_stats.xmit_bytes,
5366 (cur_jifs - info->idle_stats.xmit_idle)/
5367 HZ, info->idle_stats.recv_bytes,
5368 (cur_jifs - info->idle_stats.recv_idle)/
5369 HZ, info->idle_stats.overruns,
5370 (long)info->tty->ldisc.num);
5371 else
5372 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5373 "%10lu %8lu %9lu %6ld\n",
5374 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5375 len += size;
5376 pos = begin + len;
5377
5378 if (pos < offset) {
5379 len = 0;
5380 begin = pos;
5381 }
5382 if (pos > offset + length)
5383 goto done;
5384 }
5385 *eof = 1;
5386 done:
5387 *start = buf + (offset - begin); /* Start of wanted data */
5388 len -= (offset - begin); /* Start slop */
5389 if (len > length)
5390 len = length; /* Ending slop */
5391 if (len < 0)
5392 len = 0;
5393 return len;
5394 }
5395
5396 /* The serial driver boot-time initialization code!
5397 Hardware I/O ports are mapped to character special devices on a
5398 first found, first allocated manner. That is, this code searches
5399 for Cyclom cards in the system. As each is found, it is probed
5400 to discover how many chips (and thus how many ports) are present.
5401 These ports are mapped to the tty ports 32 and upward in monotonic
5402 fashion. If an 8-port card is replaced with a 16-port card, the
5403 port mapping on a following card will shift.
5404
5405 This approach is different from what is used in the other serial
5406 device driver because the Cyclom is more properly a multiplexer,
5407 not just an aggregation of serial ports on one card.
5408
5409 If there are more cards with more ports than have been
5410 statically allocated above, a warning is printed and the
5411 extra ports are ignored.
5412 */
5413
5414 static const struct tty_operations cy_ops = {
5415 .open = cy_open,
5416 .close = cy_close,
5417 .write = cy_write,
5418 .put_char = cy_put_char,
5419 .flush_chars = cy_flush_chars,
5420 .write_room = cy_write_room,
5421 .chars_in_buffer = cy_chars_in_buffer,
5422 .flush_buffer = cy_flush_buffer,
5423 .ioctl = cy_ioctl,
5424 .throttle = cy_throttle,
5425 .unthrottle = cy_unthrottle,
5426 .set_termios = cy_set_termios,
5427 .stop = cy_stop,
5428 .start = cy_start,
5429 .hangup = cy_hangup,
5430 .break_ctl = cy_break,
5431 .wait_until_sent = cy_wait_until_sent,
5432 .read_proc = cyclades_get_proc_info,
5433 .tiocmget = cy_tiocmget,
5434 .tiocmset = cy_tiocmset,
5435 };
5436
5437 static int __init cy_init(void)
5438 {
5439 unsigned int nboards;
5440 int retval = -ENOMEM;
5441
5442 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5443 if (!cy_serial_driver)
5444 goto err;
5445
5446 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5447 __DATE__, __TIME__);
5448
5449 /* Initialize the tty_driver structure */
5450
5451 cy_serial_driver->owner = THIS_MODULE;
5452 cy_serial_driver->driver_name = "cyclades";
5453 cy_serial_driver->name = "ttyC";
5454 cy_serial_driver->major = CYCLADES_MAJOR;
5455 cy_serial_driver->minor_start = 0;
5456 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5457 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5458 cy_serial_driver->init_termios = tty_std_termios;
5459 cy_serial_driver->init_termios.c_cflag =
5460 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5461 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5462 tty_set_operations(cy_serial_driver, &cy_ops);
5463
5464 retval = tty_register_driver(cy_serial_driver);
5465 if (retval) {
5466 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5467 goto err_frtty;
5468 }
5469
5470 /* the code below is responsible to find the boards. Each different
5471 type of board has its own detection routine. If a board is found,
5472 the next cy_card structure available is set by the detection
5473 routine. These functions are responsible for checking the
5474 availability of cy_card and cy_port data structures and updating
5475 the cy_next_channel. */
5476
5477 /* look for isa boards */
5478 nboards = cy_detect_isa();
5479
5480 #ifdef CONFIG_PCI
5481 /* look for pci boards */
5482 retval = pci_register_driver(&cy_pci_driver);
5483 if (retval && !nboards)
5484 goto err_unr;
5485 #endif
5486
5487 return 0;
5488 err_unr:
5489 tty_unregister_driver(cy_serial_driver);
5490 err_frtty:
5491 put_tty_driver(cy_serial_driver);
5492 err:
5493 return retval;
5494 } /* cy_init */
5495
5496 static void __exit cy_cleanup_module(void)
5497 {
5498 struct cyclades_card *card;
5499 int i, e1;
5500
5501 #ifndef CONFIG_CYZ_INTR
5502 del_timer_sync(&cyz_timerlist);
5503 #endif /* CONFIG_CYZ_INTR */
5504
5505 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5506 printk(KERN_ERR "failed to unregister Cyclades serial "
5507 "driver(%d)\n", e1);
5508
5509 #ifdef CONFIG_PCI
5510 pci_unregister_driver(&cy_pci_driver);
5511 #endif
5512
5513 for (i = 0; i < NR_CARDS; i++) {
5514 card = &cy_card[i];
5515 if (card->base_addr) {
5516 /* clear interrupt */
5517 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5518 iounmap(card->base_addr);
5519 if (card->ctl_addr)
5520 iounmap(card->ctl_addr);
5521 if (card->irq
5522 #ifndef CONFIG_CYZ_INTR
5523 && !IS_CYC_Z(*card)
5524 #endif /* CONFIG_CYZ_INTR */
5525 )
5526 free_irq(card->irq, card);
5527 for (e1 = card->first_line;
5528 e1 < card->first_line +
5529 card->nports; e1++)
5530 tty_unregister_device(cy_serial_driver, e1);
5531 kfree(card->ports);
5532 }
5533 }
5534
5535 put_tty_driver(cy_serial_driver);
5536 } /* cy_cleanup_module */
5537
5538 module_init(cy_init);
5539 module_exit(cy_cleanup_module);
5540
5541 MODULE_LICENSE("GPL");
5542 MODULE_VERSION(CY_VERSION);
Support for the Chinese Samsung S3C2440 based development boards