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Char: cyclades, remove locking macros
[mirror_ubuntu-artful-kernel.git] / drivers / char / cyclades.c
1 #undef BLOCKMOVE
2 #define Z_WAKE
3 #undef Z_EXT_CHARS_IN_BUFFER
4
5 /*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13 * Currently maintained by Cyclades team <async@cyclades.com>.
14 *
15 * For Technical support and installation problems, please send e-mail
16 * to support@cyclades.com.
17 *
18 * Much of the design and some of the code came from serial.c
19 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
20 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
21 * and then fixed as suggested by Michael K. Johnson 12/12/92.
22 *
23 * This version supports shared IRQ's (only for PCI boards).
24 *
25 * $Log: cyclades.c,v $
26 * Prevent users from opening non-existing Z ports.
27 *
28 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
29 * Fixed the PCI detection function to work properly on Alpha systems.
30 * Implemented support for TIOCSERGETLSR ioctl.
31 * Implemented full support for non-standard baud rates.
32 *
33 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
34 * Request PLX I/O region, although driver doesn't use it, to avoid
35 * problems with other drivers accessing it.
36 * Removed count for on-board buffer characters in cy_chars_in_buffer
37 * (Cyclades-Z only).
38 *
39 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
40 * Driver now reports physical instead of virtual memory addresses.
41 * Masks were added to some Cyclades-Z read accesses.
42 * Implemented workaround for PLX9050 bug that would cause a system lockup
43 * in certain systems, depending on the MMIO addresses allocated to the
44 * board.
45 * Changed the Tx interrupt programming in the CD1400 chips to boost up
46 * performance (Cyclom-Y only).
47 * Code is now compliant with the new module interface (module_[init|exit]).
48 * Make use of the PCI helper functions to access PCI resources.
49 * Did some code "housekeeping".
50 *
51 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
52 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
53 *
54 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
55 * Fixed SMP locking in Cyclom-Y interrupt handler.
56 *
57 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
58 * Added a new cyclades_card field called nports to allow the driver to
59 * know the exact number of ports found by the Z firmware after its load;
60 * RX buffer contention prevention logic on interrupt op mode revisited
61 * (Cyclades-Z only);
62 * Revisited printk's for Z debug;
63 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
64 *
65 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
66 * Fixed bug in cyz_poll that would make all ports but port 0
67 * unable to transmit/receive data (Cyclades-Z only);
68 * Implemented logic to prevent the RX buffer from being stuck with data
69 * due to a driver / firmware race condition in interrupt op mode
70 * (Cyclades-Z only);
71 * Fixed bug in block_til_ready logic that would lead to a system crash;
72 * Revisited cy_close spinlock usage;
73 *
74 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
75 * Revisited CONFIG_PCI conditional compilation for PCI board support;
76 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
77 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
78 * Removed CTS handling from the driver -- this is now completely handled
79 * by the firmware (Cyclades-Z only);
80 * Flush RX on-board buffers on a port open (Cyclades-Z only);
81 * Fixed handling of ASYNC_SPD_* TTY flags;
82 * Module unload now unmaps all memory area allocated by ioremap;
83 *
84 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
85 * Removed CY_PROC conditional compilation;
86 * Implemented SMP-awareness for the driver;
87 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
88 * functions;
89 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
90 * (irq=NN) as parameters (only for ISA boards);
91 * Fixed bug in set_line_char that would prevent the Cyclades-Z
92 * ports from being configured at speeds above 115.2Kbps;
93 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
94 * switching from working properly;
95 * The driver now only prints IRQ info for the Cyclades-Z if it's
96 * configured to work in interrupt mode;
97 *
98 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
99 * Added support for interrupt mode operation for the Z cards;
100 * Removed the driver inactivity control for the Z;
101 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
102 * the Z firmware is not loaded yet;
103 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
104 * same functionality;
105 * Implemented workaround for IRQ setting loss on the PCI configuration
106 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
107 *
108 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
109 * /proc entry location changed to /proc/tty/driver/cyclades;
110 * Added support to shared IRQ's (only for PCI boards);
111 * Added support for Cobalt Qube2 systems;
112 * IRQ [de]allocation scheme revisited;
113 * BREAK implementation changed in order to make use of the 'break_ctl'
114 * TTY facility;
115 * Fixed typo in TTY structure field 'driver_name';
116 * Included a PCI bridge reset and EEPROM reload in the board
117 * initialization code (for both Y and Z series).
118 *
119 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
120 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
121 * closed properly after a SIGINT;
122 * Module usage counter scheme revisited;
123 * Added support to the upcoming Y PCI boards (i.e., support to additional
124 * PCI Device ID's).
125 *
126 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
127 * Removed all unnecessary page-alignement operations in ioremap calls
128 * (ioremap is currently safe for these operations).
129 *
130 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
131 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
132 * order to make PLX9050-based boards work with certain motherboards.
133 *
134 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
135 * cy_close function now resets (correctly) the tty->closing flag;
136 * JIFFIES_DIFF macro fixed.
137 *
138 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
139 * Fixed bug in cy_close function, which was not informing HW of
140 * which port should have the reception disabled before doing so;
141 * fixed Cyclom-8YoP hardware detection bug.
142 *
143 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
144 * Fixed bug in cy_close function, which causes malfunction
145 * of one of the first 4 ports when a higher port is closed
146 * (Cyclom-Y only).
147 *
148 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
149 * Fixed Cyclom-4Yo hardware detection bug.
150 *
151 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
152 * /proc/cyclades implementation with great collaboration of
153 * Marc Lewis <marc@blarg.net>;
154 * cyy_interrupt was changed to avoid occurrence of kernel oopses
155 * during PPP operation.
156 *
157 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
158 * General code review in order to comply with 2.1 kernel standards;
159 * data loss prevention for slow devices revisited (cy_wait_until_sent
160 * was created);
161 * removed conditional compilation for new/old PCI structure support
162 * (now the driver only supports the new PCI structure).
163 *
164 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
165 * added conditional compilation for new/old PCI structure support;
166 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
167 *
168 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
169 * cleaned up the data loss fix;
170 * fixed XON/XOFF handling once more (Cyclades-Z);
171 * general review of the driver routines;
172 * introduction of a mechanism to prevent data loss with slow
173 * printers, by forcing a delay before closing the port.
174 *
175 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
176 * fixed detection/handling of new CD1400 in Ye boards;
177 * fixed XON/XOFF handling (Cyclades-Z);
178 * fixed data loss caused by a premature port close;
179 * introduction of a flag that holds the CD1400 version ID per port
180 * (used by the CYGETCD1400VER new ioctl).
181 *
182 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
183 * Code review for the module cleanup routine;
184 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
185 * includes anonymous changes regarding signal_pending.
186 *
187 * Revision 2.1 1997/11/01 17:42:41 ivan
188 * Changes in the driver to support Alpha systems (except 8Zo V_1);
189 * BREAK fix for the Cyclades-Z boards;
190 * driver inactivity control by FW implemented;
191 * introduction of flag that allows driver to take advantage of
192 * a special CD1400 feature related to HW flow control;
193 * added support for the CD1400 rev. J (Cyclom-Y boards);
194 * introduction of ioctls to:
195 * - control the rtsdtr_inv flag (Cyclom-Y);
196 * - control the rflow flag (Cyclom-Y);
197 * - adjust the polling interval (Cyclades-Z);
198 *
199 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
200 * Fixes related to kernel version conditional
201 * compilation.
202 *
203 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
204 * Compatibility issues between kernels 2.0.x and
205 * 2.1.x (mainly related to clear_bit function).
206 *
207 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
208 * Changes to define the memory window according to the
209 * board type.
210 *
211 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
212 * Changes to support new cycladesZ boards.
213 *
214 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
215 * Merge of Bentson's and Daniel's version 1.36.4.28.
216 * Corrects bug in cy_detect_pci: check if there are more
217 * ports than the number of static structs allocated.
218 * Warning message during initialization if this driver is
219 * used with the new generation of cycladesZ boards. Those
220 * will be supported only in next release of the driver.
221 * Corrects bug in cy_detect_pci and cy_detect_isa that
222 * returned wrong number of VALID boards, when a cyclomY
223 * was found with no serial modules connected.
224 * Changes to use current (2.1.x) kernel subroutine names
225 * and created macros for compilation with 2.0.x kernel,
226 * instead of the other way around.
227 *
228 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
229 * Change queue_task_irq_off to queue_task_irq.
230 * The inline function queue_task_irq_off (tqueue.h)
231 * was removed from latest releases of 2.1.x kernel.
232 * Use of macro __init to mark the initialization
233 * routines, so memory can be reused.
234 * Also incorporate implementation of critical region
235 * in function cleanup_module() created by anonymous
236 * linuxer.
237 *
238 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
239 * Change to support new firmware that solves DCD problem:
240 * application could fail to receive SIGHUP signal when DCD
241 * varying too fast.
242 *
243 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
244 * Changed for support linux versions 2.1.X.
245 * Backward compatible with linux versions 2.0.X.
246 * Corrected illegal use of filler field in
247 * CH_CTRL struct.
248 * Deleted some debug messages.
249 *
250 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
251 * Included check for NULL tty pointer in cyz_poll.
252 *
253 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
254 * Bill Foster at Blarg! Online services noticed that
255 * some of the switch elements of -Z modem control
256 * lacked a closing "break;"
257 *
258 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
259 * Changed low water threshold for buffer xmit_buf
260 *
261 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
262 * Marcio provided fix to modem status fetch for -Z
263 *
264 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
265 * improve mapping of -Z control page (thanks to Steve
266 * Price <stevep@fa.tdktca.com> for help on this)
267 *
268 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
269 * shift from CPU-bound to memcopy in cyz_polling operation
270 *
271 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
272 * Added support to set and report higher speeds.
273 *
274 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
275 * Some fixes in the HW flow control for the BETA release.
276 * Don't try to register the IRQ.
277 *
278 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
279 * make sure "cyc" appears in all kernel messages; all soft interrupts
280 * handled by same routine; recognize out-of-band reception; comment
281 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
282 * fix race condition in -Z buffer management; only -Y needs to explicitly
283 * flush chars; tidy up some startup messages;
284 *
285 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
286 * shift MOD_INC_USE_COUNT location to match
287 * serial.c; purge some diagnostic messages;
288 *
289 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
290 * enable modem status messages and fetch & process them; note
291 * time of last activity type for each port; set_line_char now
292 * supports more than line 0 and treats 0 baud correctly;
293 * get_modem_info senses rs_status;
294 *
295 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
296 * barely works--now's time to turn on
297 * more features 'til it breaks
298 *
299 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
300 * check more -Z board status; shorten boot message
301 *
302 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
303 * fix reference to ch_ctrl in startup; verify return
304 * values from cyz_issue_cmd and cyz_update_channel;
305 * more stuff to get modem control correct;
306 *
307 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
308 * more -Z stuff folded in; re-order changes to put -Z stuff
309 * after -Y stuff (to make changes clearer)
310 *
311 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
312 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
313 * Add code to send break. Clear firmware ID word at startup (so
314 * that other code won't talk to inactive board).
315 *
316 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
317 * add code for -Z in set_line_char
318 *
319 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
320 * fold more -Z stuff (or in some cases, error messages)
321 * into driver; add text to "don't know what to do" messages.
322 *
323 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
324 * moved compile-time flags near top of file; cosmetic changes
325 * to narrow text (to allow 2-up printing); changed many declarations
326 * to "static" to limit external symbols; shuffled code order to
327 * coalesce -Y and -Z specific code, also to put internal functions
328 * in order of tty_driver structure; added code to recognize -Z
329 * ports (and for moment, do nothing or report error); add cy_startup
330 * to parse boot command line for extra base addresses for ISA probes;
331 *
332 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
333 * reorder some code, fix types of some vars (int vs. long),
334 * add cy_setup to support user declared ISA addresses
335 *
336 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
337 * dump ioctl based firmware load (it's now a user level
338 * program); ensure uninitialzed ports cannot be used
339 *
340 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
341 * rename vars and restructure some code
342 *
343 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
344 * get right status back after boot load
345 *
346 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
347 * successfully loads firmware
348 *
349 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
350 * add more of the code for the boot/load ioctls
351 *
352 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
353 * start to add Z functionality--starting with ioctl
354 * for loading firmware
355 *
356 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
357 * added code to recognize Z/PCI card at initialization; report
358 * presence, but card is not initialized (because firmware needs
359 * to be loaded)
360 *
361 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
362 * starting minor number at zero; added missing verify_area
363 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
364 *
365 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
366 * remove unneeded boot message & fix CLOCAL hardware flow
367 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
368 * remove unused diagnostic statements; minor 0 is first;
369 *
370 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
371 * The kernel function vremap (available only in later 1.3.xx kernels)
372 * allows the access to memory addresses above the RAM. This revision
373 * of the driver supports PCI boards below 1Mb (device id 0x100) and
374 * above 1Mb (device id 0x101).
375 *
376 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
377 * Some global changes to interrupt handling spilled into
378 * this driver--mostly unused arguments in system function
379 * calls. Also added change by Marcio Saito which should
380 * reduce lost interrupts at startup by fast processors.
381 *
382 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
383 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
384 * in 1.3.41 kernel to remove a possible race condition, extend
385 * some error messages, and let the driver run as a loadable module
386 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
387 * possible race condition.
388 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
389 *
390 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
391 * Changes by Linus Torvalds in 1.3.33 kernel distribution
392 * required due to reordering of driver initialization.
393 * Drivers are now initialized *after* memory management.
394 *
395 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
396 * remove printk from ISR; fix typo
397 *
398 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
399 * Minor fixes in the PCI board support. PCI function calls in
400 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
401 * <duncan@okay.com>. "bad serial count" message removed.
402 *
403 * Revision 1.36.3 1995/08/22 09:19:42 marcio
404 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
405 * board initialization. Changes in the boot messages. The driver
406 * supports up to 4 boards and 64 ports by default.
407 *
408 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
409 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
410 *
411 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
412 * add missing break in modem control block in ioctl switch statement
413 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
414 *
415 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
416 * make sure CTS flow control is set as soon as possible (thanks
417 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
418 *
419 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
420 * initialize defaults for receive threshold and stale data timeout;
421 * cosmetic changes;
422 *
423 * Revision 1.36 1995/03/10 23:33:53 bentson
424 * added support of chips 4-7 in 32 port Cyclom-Ye;
425 * fix cy_interrupt pointer dereference problem
426 * (Joe Portman <baron@aa.net>);
427 * give better error response if open is attempted on non-existent port
428 * (Zachariah Vaum <jchryslr@netcom.com>);
429 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
430 * conditional compilation for -16Y on systems with fast, noisy bus;
431 * comment out diagnostic print function;
432 * cleaned up table of base addresses;
433 * set receiver time-out period register to correct value,
434 * set receive threshold to better default values,
435 * set chip timer to more accurate 200 Hz ticking,
436 * add code to monitor and modify receive parameters
437 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
438 * <njs@scifi.emi.net>);
439 *
440 * Revision 1.35 1994/12/16 13:54:18 steffen
441 * additional patch by Marcio Saito for board detection
442 * Accidently left out in 1.34
443 *
444 * Revision 1.34 1994/12/10 12:37:12 steffen
445 * This is the corrected version as suggested by Marcio Saito
446 *
447 * Revision 1.33 1994/12/01 22:41:18 bentson
448 * add hooks to support more high speeds directly; add tytso
449 * patch regarding CLOCAL wakeups
450 *
451 * Revision 1.32 1994/11/23 19:50:04 bentson
452 * allow direct kernel control of higher signalling rates;
453 * look for cards at additional locations
454 *
455 * Revision 1.31 1994/11/16 04:33:28 bentson
456 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
457 * a problem in chars_in_buffer has been resolved by some
458 * small changes; this should yield smoother output
459 *
460 * Revision 1.30 1994/11/16 04:28:05 bentson
461 * Fix from Corey Minyard, Internet: minyard@metronet.com,
462 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
463 * cy_hangup that appears to clear up much (all?) of the
464 * DTR glitches; also he's added/cleaned-up diagnostic messages
465 *
466 * Revision 1.29 1994/11/16 04:16:07 bentson
467 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
468 * operate higher speeds in same way as other serial ports;
469 * add more serial ports (for up to two 16-port muxes).
470 *
471 * Revision 1.28 1994/11/04 00:13:16 root
472 * turn off diagnostic messages
473 *
474 * Revision 1.27 1994/11/03 23:46:37 root
475 * bunch of changes to bring driver into greater conformance
476 * with the serial.c driver (looking for missed fixes)
477 *
478 * Revision 1.26 1994/11/03 22:40:36 root
479 * automatic interrupt probing fixed.
480 *
481 * Revision 1.25 1994/11/03 20:17:02 root
482 * start to implement auto-irq
483 *
484 * Revision 1.24 1994/11/03 18:01:55 root
485 * still working on modem signals--trying not to drop DTR
486 * during the getty/login processes
487 *
488 * Revision 1.23 1994/11/03 17:51:36 root
489 * extend baud rate support; set receive threshold as function
490 * of baud rate; fix some problems with RTS/CTS;
491 *
492 * Revision 1.22 1994/11/02 18:05:35 root
493 * changed arguments to udelay to type long to get
494 * delays to be of correct duration
495 *
496 * Revision 1.21 1994/11/02 17:37:30 root
497 * employ udelay (after calibrating loops_per_second earlier
498 * in init/main.c) instead of using home-grown delay routines
499 *
500 * Revision 1.20 1994/11/02 03:11:38 root
501 * cy_chars_in_buffer forces a return value of 0 to let
502 * login work (don't know why it does); some functions
503 * that were returning EFAULT, now executes the code;
504 * more work on deciding when to disable xmit interrupts;
505 *
506 * Revision 1.19 1994/11/01 20:10:14 root
507 * define routine to start transmission interrupts (by enabling
508 * transmit interrupts); directly enable/disable modem interrupts;
509 *
510 * Revision 1.18 1994/11/01 18:40:45 bentson
511 * Don't always enable transmit interrupts in startup; interrupt on
512 * TxMpty instead of TxRdy to help characters get out before shutdown;
513 * restructure xmit interrupt to check for chars first and quit if
514 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
515 * (to my view);
516 *
517 * Revision 1.17 1994/10/30 04:39:45 bentson
518 * rename serial_driver and callout_driver to cy_serial_driver and
519 * cy_callout_driver to avoid linkage interference; initialize
520 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
521 * from cyclades_port structure; add paranoia check to cy_close;
522 *
523 * Revision 1.16 1994/10/30 01:14:33 bentson
524 * change major numbers; add some _early_ return statements;
525 *
526 * Revision 1.15 1994/10/29 06:43:15 bentson
527 * final tidying up for clean compile; enable some error reporting
528 *
529 * Revision 1.14 1994/10/28 20:30:22 Bentson
530 * lots of changes to drag the driver towards the new tty_io
531 * structures and operation. not expected to work, but may
532 * compile cleanly.
533 *
534 * Revision 1.13 1994/07/21 23:08:57 Bentson
535 * add some diagnostic cruft; support 24 lines (for testing
536 * both -8Y and -16Y cards; be more thorough in servicing all
537 * chips during interrupt; add "volatile" a few places to
538 * circumvent compiler optimizations; fix base & offset
539 * computations in block_til_ready (was causing chip 0 to
540 * stop operation)
541 *
542 * Revision 1.12 1994/07/19 16:42:11 Bentson
543 * add some hackery for kernel version 1.1.8; expand
544 * error messages; refine timing for delay loops and
545 * declare loop params volatile
546 *
547 * Revision 1.11 1994/06/11 21:53:10 bentson
548 * get use of save_car right in transmit interrupt service
549 *
550 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
551 * add some diagnostic printing; try to fix save_car stuff
552 *
553 * Revision 1.10 1994/06/11 20:36:08 bentson
554 * clean up compiler warnings
555 *
556 * Revision 1.9 1994/06/11 19:42:46 bentson
557 * added a bunch of code to support modem signalling
558 *
559 * Revision 1.8 1994/06/11 17:57:07 bentson
560 * recognize break & parity error
561 *
562 * Revision 1.7 1994/06/05 05:51:34 bentson
563 * Reorder baud table to be monotonic; add cli to CP; discard
564 * incoming characters and status if the line isn't open; start to
565 * fold code into cy_throttle; start to port get_serial_info,
566 * set_serial_info, get_modem_info, set_modem_info, and send_break
567 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
568 * get flow control characters from tty struct; invalidate ports w/o
569 * hardware;
570 *
571 * Revision 1.6 1994/05/31 18:42:21 bentson
572 * add a loop-breaker in the interrupt service routine;
573 * note when port is initialized so that it can be shut
574 * down under the right conditions; receive works without
575 * any obvious errors
576 *
577 * Revision 1.5 1994/05/30 00:55:02 bentson
578 * transmit works without obvious errors
579 *
580 * Revision 1.4 1994/05/27 18:46:27 bentson
581 * incorporated more code from lib_y.c; can now print short
582 * strings under interrupt control to port zero; seems to
583 * select ports/channels/lines correctly
584 *
585 * Revision 1.3 1994/05/25 22:12:44 bentson
586 * shifting from multi-port on a card to proper multiplexor
587 * data structures; added skeletons of most routines
588 *
589 * Revision 1.2 1994/05/19 13:21:43 bentson
590 * start to crib from other sources
591 *
592 */
593
594 #define CY_VERSION "2.4"
595
596 /* If you need to install more boards than NR_CARDS, change the constant
597 in the definition below. No other change is necessary to support up to
598 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
599
600 #define NR_CARDS 4
601
602 /*
603 If the total number of ports is larger than NR_PORTS, change this
604 constant in the definition below. No other change is necessary to
605 support more boards/ports. */
606
607 #define NR_PORTS 256
608
609 #define ZE_V1_NPORTS 64
610 #define ZO_V1 0
611 #define ZO_V2 1
612 #define ZE_V1 2
613
614 #define SERIAL_PARANOIA_CHECK
615 #undef CY_DEBUG_OPEN
616 #undef CY_DEBUG_THROTTLE
617 #undef CY_DEBUG_OTHER
618 #undef CY_DEBUG_IO
619 #undef CY_DEBUG_COUNT
620 #undef CY_DEBUG_DTR
621 #undef CY_DEBUG_WAIT_UNTIL_SENT
622 #undef CY_DEBUG_INTERRUPTS
623 #undef CY_16Y_HACK
624 #undef CY_ENABLE_MONITORING
625 #undef CY_PCI_DEBUG
626
627 /*
628 * Include section
629 */
630 #include <linux/module.h>
631 #include <linux/errno.h>
632 #include <linux/signal.h>
633 #include <linux/sched.h>
634 #include <linux/timer.h>
635 #include <linux/interrupt.h>
636 #include <linux/tty.h>
637 #include <linux/tty_flip.h>
638 #include <linux/serial.h>
639 #include <linux/major.h>
640 #include <linux/string.h>
641 #include <linux/fcntl.h>
642 #include <linux/ptrace.h>
643 #include <linux/cyclades.h>
644 #include <linux/mm.h>
645 #include <linux/ioport.h>
646 #include <linux/init.h>
647 #include <linux/delay.h>
648 #include <linux/spinlock.h>
649 #include <linux/bitops.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 static struct tty_driver *cy_serial_driver;
685
686 #ifdef CONFIG_ISA
687 /* This is the address lookup table. The driver will probe for
688 Cyclom-Y/ISA boards at all addresses in here. If you want the
689 driver to probe addresses at a different address, add it to
690 this table. If the driver is probing some other board and
691 causing problems, remove the offending address from this table.
692 The cy_setup function extracts additional addresses from the
693 boot options line. The form is "cyclades=address,address..."
694 */
695
696 static unsigned int cy_isa_addresses[] = {
697 0xD0000,
698 0xD2000,
699 0xD4000,
700 0xD6000,
701 0xD8000,
702 0xDA000,
703 0xDC000,
704 0xDE000,
705 0, 0, 0, 0, 0, 0, 0, 0
706 };
707
708 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
709
710 #ifdef MODULE
711 static long maddr[NR_CARDS];
712 static int irq[NR_CARDS];
713
714 module_param_array(maddr, long, NULL, 0);
715 module_param_array(irq, int, NULL, 0);
716 #endif
717
718 #endif /* CONFIG_ISA */
719
720 /* This is the per-card data structure containing address, irq, number of
721 channels, etc. This driver supports a maximum of NR_CARDS cards.
722 */
723 static struct cyclades_card cy_card[NR_CARDS];
724
725 /* This is the per-channel data structure containing pointers, flags
726 and variables for the port. This driver supports a maximum of NR_PORTS.
727 */
728 static struct cyclades_port cy_port[NR_PORTS];
729
730 static int cy_next_channel; /* next minor available */
731
732 /*
733 * This is used to look up the divisor speeds and the timeouts
734 * We're normally limited to 15 distinct baud rates. The extra
735 * are accessed via settings in info->flags.
736 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
737 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
738 * HI VHI
739 * 20
740 */
741 static int baud_table[] = {
742 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
743 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
744 230400, 0
745 };
746
747 static char baud_co_25[] = { /* 25 MHz clock option table */
748 /* value => 00 01 02 03 04 */
749 /* divide by 8 32 128 512 2048 */
750 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
751 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
752 };
753
754 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
755 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
756 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
757 };
758
759 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
760 /* value => 00 01 02 03 04 */
761 /* divide by 8 32 128 512 2048 */
762 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
763 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
764 0x00
765 };
766
767 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
768 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
769 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
770 0x21
771 };
772
773 static char baud_cor3[] = { /* receive threshold */
774 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
775 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
776 0x07
777 };
778
779 /*
780 * The Cyclades driver implements HW flow control as any serial driver.
781 * The cyclades_port structure member rflow and the vector rflow_thr
782 * allows us to take advantage of a special feature in the CD1400 to avoid
783 * data loss even when the system interrupt latency is too high. These flags
784 * are to be used only with very special applications. Setting these flags
785 * requires the use of a special cable (DTR and RTS reversed). In the new
786 * CD1400-based boards (rev. 6.00 or later), there is no need for special
787 * cables.
788 */
789
790 static char rflow_thr[] = { /* rflow threshold */
791 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
792 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
793 0x0a
794 };
795
796 /* The Cyclom-Ye has placed the sequential chips in non-sequential
797 * address order. This look-up table overcomes that problem.
798 */
799 static int cy_chip_offset[] = { 0x0000,
800 0x0400,
801 0x0800,
802 0x0C00,
803 0x0200,
804 0x0600,
805 0x0A00,
806 0x0E00
807 };
808
809 /* PCI related definitions */
810
811 #ifdef CONFIG_PCI
812 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
813 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
814 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
815 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
816 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
817 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
818 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
819 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
820 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
821 { } /* end of table */
822 };
823 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
824 #endif
825
826 static void cy_start(struct tty_struct *);
827 static void set_line_char(struct cyclades_port *);
828 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
829 #ifdef CONFIG_ISA
830 static unsigned detect_isa_irq(void __iomem *);
831 #endif /* CONFIG_ISA */
832
833 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
834
835 #ifndef CONFIG_CYZ_INTR
836 static void cyz_poll(unsigned long);
837
838 /* The Cyclades-Z polling cycle is defined by this variable */
839 static long cyz_polling_cycle = CZ_DEF_POLL;
840
841 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
842
843 #else /* CONFIG_CYZ_INTR */
844 static void cyz_rx_restart(unsigned long);
845 static struct timer_list cyz_rx_full_timer[NR_PORTS];
846 #endif /* CONFIG_CYZ_INTR */
847
848 static inline int serial_paranoia_check(struct cyclades_port *info,
849 char *name, const char *routine)
850 {
851 #ifdef SERIAL_PARANOIA_CHECK
852 if (!info) {
853 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
854 "in %s\n", name, routine);
855 return 1;
856 }
857
858 if ((long)info < (long)(&cy_port[0]) ||
859 (long)(&cy_port[NR_PORTS]) < (long)info) {
860 printk(KERN_WARNING "cyc Warning: cyclades_port out of range "
861 "for (%s) in %s\n", name, routine);
862 return 1;
863 }
864
865 if (info->magic != CYCLADES_MAGIC) {
866 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
867 "struct (%s) in %s\n", name, routine);
868 return 1;
869 }
870 #endif
871 return 0;
872 } /* serial_paranoia_check */
873
874 /*
875 * This routine is used by the interrupt handler to schedule
876 * processing in the software interrupt portion of the driver
877 * (also known as the "bottom half"). This can be called any
878 * number of times for any channel without harm.
879 */
880 static inline void cy_sched_event(struct cyclades_port *info, int event)
881 {
882 info->event |= 1 << event; /* remember what kind of event and who */
883 schedule_work(&info->tqueue);
884 } /* cy_sched_event */
885
886 /*
887 * This routine is used to handle the "bottom half" processing for the
888 * serial driver, known also the "software interrupt" processing.
889 * This processing is done at the kernel interrupt level, after the
890 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
891 * is where time-consuming activities which can not be done in the
892 * interrupt driver proper are done; the interrupt driver schedules
893 * them using cy_sched_event(), and they get done here.
894 *
895 * This is done through one level of indirection--the task queue.
896 * When a hardware interrupt service routine wants service by the
897 * driver's bottom half, it enqueues the appropriate tq_struct (one
898 * per port) to the keventd work queue and sets a request flag
899 * that the work queue be processed.
900 *
901 * Although this may seem unwieldy, it gives the system a way to
902 * pass an argument (in this case the pointer to the cyclades_port
903 * structure) to the bottom half of the driver. Previous kernels
904 * had to poll every port to see if that port needed servicing.
905 */
906 static void
907 do_softint(struct work_struct *work)
908 {
909 struct cyclades_port *info =
910 container_of(work, struct cyclades_port, tqueue);
911 struct tty_struct *tty;
912
913 tty = info->tty;
914 if (!tty)
915 return;
916
917 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
918 tty_hangup(info->tty);
919 wake_up_interruptible(&info->open_wait);
920 info->flags &= ~ASYNC_NORMAL_ACTIVE;
921 }
922 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
923 wake_up_interruptible(&info->open_wait);
924 #ifdef CONFIG_CYZ_INTR
925 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event) &&
926 !timer_pending(&cyz_rx_full_timer[info->line]))
927 mod_timer(&cyz_rx_full_timer[info->line], jiffies + 1);
928 #endif
929 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
930 wake_up_interruptible(&info->delta_msr_wait);
931 tty_wakeup(tty);
932 #ifdef Z_WAKE
933 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
934 complete(&info->shutdown_wait);
935 #endif
936 } /* do_softint */
937
938
939 /***********************************************************/
940 /********* Start of block of Cyclom-Y specific code ********/
941
942 /* This routine waits up to 1000 micro-seconds for the previous
943 command to the Cirrus chip to complete and then issues the
944 new command. An error is returned if the previous command
945 didn't finish within the time limit.
946
947 This function is only called from inside spinlock-protected code.
948 */
949 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
950 {
951 unsigned int i;
952
953 /* Check to see that the previous command has completed */
954 for (i = 0; i < 100; i++) {
955 if (readb(base_addr + (CyCCR << index)) == 0) {
956 break;
957 }
958 udelay(10L);
959 }
960 /* if the CCR never cleared, the previous command
961 didn't finish within the "reasonable time" */
962 if (i == 100)
963 return -1;
964
965 /* Issue the new command */
966 cy_writeb(base_addr + (CyCCR << index), cmd);
967
968 return 0;
969 } /* cyy_issue_cmd */
970
971 #ifdef CONFIG_ISA
972 /* ISA interrupt detection code */
973 static unsigned detect_isa_irq(void __iomem * address)
974 {
975 int irq;
976 unsigned long irqs, flags;
977 int save_xir, save_car;
978 int index = 0; /* IRQ probing is only for ISA */
979
980 /* forget possible initially masked and pending IRQ */
981 irq = probe_irq_off(probe_irq_on());
982
983 /* Clear interrupts on the board first */
984 cy_writeb(address + (Cy_ClrIntr << index), 0);
985 /* Cy_ClrIntr is 0x1800 */
986
987 irqs = probe_irq_on();
988 /* Wait ... */
989 udelay(5000L);
990
991 /* Enable the Tx interrupts on the CD1400 */
992 local_irq_save(flags);
993 cy_writeb(address + (CyCAR << index), 0);
994 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
995
996 cy_writeb(address + (CyCAR << index), 0);
997 cy_writeb(address + (CySRER << index),
998 readb(address + (CySRER << index)) | CyTxRdy);
999 local_irq_restore(flags);
1000
1001 /* Wait ... */
1002 udelay(5000L);
1003
1004 /* Check which interrupt is in use */
1005 irq = probe_irq_off(irqs);
1006
1007 /* Clean up */
1008 save_xir = (u_char) readb(address + (CyTIR << index));
1009 save_car = readb(address + (CyCAR << index));
1010 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1011 cy_writeb(address + (CySRER << index),
1012 readb(address + (CySRER << index)) & ~CyTxRdy);
1013 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1014 cy_writeb(address + (CyCAR << index), (save_car));
1015 cy_writeb(address + (Cy_ClrIntr << index), 0);
1016 /* Cy_ClrIntr is 0x1800 */
1017
1018 return (irq > 0) ? irq : 0;
1019 }
1020 #endif /* CONFIG_ISA */
1021
1022 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1023 void __iomem * base_addr, int status, int index)
1024 {
1025 struct cyclades_port *info;
1026 struct tty_struct *tty;
1027 int char_count;
1028 int i, j, len, mdm_change, mdm_status, outch;
1029 int save_xir, channel, save_car;
1030 char data;
1031
1032 if (status & CySRReceive) { /* reception interrupt */
1033 #ifdef CY_DEBUG_INTERRUPTS
1034 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
1035 #endif
1036 /* determine the channel & change to that context */
1037 spin_lock(&cinfo->card_lock);
1038 save_xir = (u_char) readb(base_addr + (CyRIR << index));
1039 channel = (u_short) (save_xir & CyIRChannel);
1040 i = channel + chip * 4 + cinfo->first_line;
1041 info = &cy_port[i];
1042 save_car = readb(base_addr + (CyCAR << index));
1043 cy_writeb(base_addr + (CyCAR << index), save_xir);
1044
1045 /* if there is nowhere to put the data, discard it */
1046 if (info->tty == 0) {
1047 j = (readb(base_addr + (CyRIVR << index)) &
1048 CyIVRMask);
1049 if (j == CyIVRRxEx) { /* exception */
1050 data = readb(base_addr + (CyRDSR << index));
1051 } else { /* normal character reception */
1052 char_count = readb(base_addr +
1053 (CyRDCR << index));
1054 while (char_count--) {
1055 data = readb(base_addr +
1056 (CyRDSR << index));
1057 }
1058 }
1059 } else { /* there is an open port for this data */
1060 tty = info->tty;
1061 j = (readb(base_addr + (CyRIVR << index)) &
1062 CyIVRMask);
1063 if (j == CyIVRRxEx) { /* exception */
1064 data = readb(base_addr + (CyRDSR << index));
1065
1066 /* For statistics only */
1067 if (data & CyBREAK)
1068 info->icount.brk++;
1069 else if (data & CyFRAME)
1070 info->icount.frame++;
1071 else if (data & CyPARITY)
1072 info->icount.parity++;
1073 else if (data & CyOVERRUN)
1074 info->icount.overrun++;
1075
1076 if (data & info->ignore_status_mask) {
1077 info->icount.rx++;
1078 return;
1079 }
1080 if (tty_buffer_request_room(tty, 1)) {
1081 if (data & info->read_status_mask) {
1082 if (data & CyBREAK) {
1083 tty_insert_flip_char(
1084 tty,
1085 readb(
1086 base_addr +
1087 (CyRDSR <<
1088 index)),
1089 TTY_BREAK);
1090 info->icount.rx++;
1091 if (info->flags &
1092 ASYNC_SAK) {
1093 do_SAK(tty);
1094 }
1095 } else if (data & CyFRAME) {
1096 tty_insert_flip_char(
1097 tty,
1098 readb(
1099 base_addr +
1100 (CyRDSR <<
1101 index)),
1102 TTY_FRAME);
1103 info->icount.rx++;
1104 info->idle_stats.
1105 frame_errs++;
1106 } else if (data & CyPARITY) {
1107 /* Pieces of seven... */
1108 tty_insert_flip_char(
1109 tty,
1110 readb(
1111 base_addr +
1112 (CyRDSR <<
1113 index)),
1114 TTY_PARITY);
1115 info->icount.rx++;
1116 info->idle_stats.
1117 parity_errs++;
1118 } else if (data & CyOVERRUN) {
1119 tty_insert_flip_char(
1120 tty, 0,
1121 TTY_OVERRUN);
1122 info->icount.rx++;
1123 /* If the flip buffer itself is
1124 overflowing, we still lose
1125 the next incoming character.
1126 */
1127 tty_insert_flip_char(
1128 tty,
1129 readb(
1130 base_addr +
1131 (CyRDSR <<
1132 index)),
1133 TTY_FRAME);
1134 info->icount.rx++;
1135 info->idle_stats.
1136 overruns++;
1137 /* These two conditions may imply */
1138 /* a normal read should be done. */
1139 /* }else if(data & CyTIMEOUT){ */
1140 /* }else if(data & CySPECHAR){ */
1141 } else {
1142 tty_insert_flip_char(
1143 tty, 0,
1144 TTY_NORMAL);
1145 info->icount.rx++;
1146 }
1147 } else {
1148 tty_insert_flip_char(tty, 0,
1149 TTY_NORMAL);
1150 info->icount.rx++;
1151 }
1152 } else {
1153 /* there was a software buffer
1154 overrun and nothing could be
1155 done about it!!! */
1156 info->icount.buf_overrun++;
1157 info->idle_stats.overruns++;
1158 }
1159 } else { /* normal character reception */
1160 /* load # chars available from the chip */
1161 char_count = readb(base_addr +
1162 (CyRDCR << index));
1163
1164 #ifdef CY_ENABLE_MONITORING
1165 ++info->mon.int_count;
1166 info->mon.char_count += char_count;
1167 if (char_count > info->mon.char_max)
1168 info->mon.char_max = char_count;
1169 info->mon.char_last = char_count;
1170 #endif
1171 len = tty_buffer_request_room(tty, char_count);
1172 while (len--) {
1173 data = readb(base_addr +
1174 (CyRDSR << index));
1175 tty_insert_flip_char(tty, data,
1176 TTY_NORMAL);
1177 info->idle_stats.recv_bytes++;
1178 info->icount.rx++;
1179 #ifdef CY_16Y_HACK
1180 udelay(10L);
1181 #endif
1182 }
1183 info->idle_stats.recv_idle = jiffies;
1184 }
1185 tty_schedule_flip(tty);
1186 }
1187 /* end of service */
1188 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1189 cy_writeb(base_addr + (CyCAR << index), (save_car));
1190 spin_unlock(&cinfo->card_lock);
1191 }
1192
1193 if (status & CySRTransmit) { /* transmission interrupt */
1194 /* Since we only get here when the transmit buffer
1195 is empty, we know we can always stuff a dozen
1196 characters. */
1197 #ifdef CY_DEBUG_INTERRUPTS
1198 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1199 #endif
1200
1201 /* determine the channel & change to that context */
1202 spin_lock(&cinfo->card_lock);
1203 save_xir = (u_char) readb(base_addr + (CyTIR << index));
1204 channel = (u_short) (save_xir & CyIRChannel);
1205 i = channel + chip * 4 + cinfo->first_line;
1206 save_car = readb(base_addr + (CyCAR << index));
1207 cy_writeb(base_addr + (CyCAR << index), save_xir);
1208
1209 /* validate the port# (as configured and open) */
1210 if ((i < 0) || (NR_PORTS <= i)) {
1211 cy_writeb(base_addr + (CySRER << index),
1212 readb(base_addr + (CySRER << index)) &
1213 ~CyTxRdy);
1214 goto txend;
1215 }
1216 info = &cy_port[i];
1217 if (info->tty == 0) {
1218 cy_writeb(base_addr + (CySRER << index),
1219 readb(base_addr + (CySRER << index)) &
1220 ~CyTxRdy);
1221 goto txdone;
1222 }
1223
1224 /* load the on-chip space for outbound data */
1225 char_count = info->xmit_fifo_size;
1226
1227 if (info->x_char) { /* send special char */
1228 outch = info->x_char;
1229 cy_writeb(base_addr + (CyTDR << index), outch);
1230 char_count--;
1231 info->icount.tx++;
1232 info->x_char = 0;
1233 }
1234
1235 if (info->breakon || info->breakoff) {
1236 if (info->breakon) {
1237 cy_writeb(base_addr + (CyTDR << index), 0);
1238 cy_writeb(base_addr + (CyTDR << index), 0x81);
1239 info->breakon = 0;
1240 char_count -= 2;
1241 }
1242 if (info->breakoff) {
1243 cy_writeb(base_addr + (CyTDR << index), 0);
1244 cy_writeb(base_addr + (CyTDR << index), 0x83);
1245 info->breakoff = 0;
1246 char_count -= 2;
1247 }
1248 }
1249
1250 while (char_count-- > 0) {
1251 if (!info->xmit_cnt) {
1252 if (readb(base_addr + (CySRER << index)) &
1253 CyTxMpty) {
1254 cy_writeb(base_addr + (CySRER << index),
1255 readb(base_addr +
1256 (CySRER << index)) &
1257 ~CyTxMpty);
1258 } else {
1259 cy_writeb(base_addr + (CySRER << index),
1260 (readb(base_addr +
1261 (CySRER << index)) &
1262 ~CyTxRdy) | CyTxMpty);
1263 }
1264 goto txdone;
1265 }
1266 if (info->xmit_buf == 0) {
1267 cy_writeb(base_addr + (CySRER << index),
1268 readb(base_addr + (CySRER << index)) &
1269 ~CyTxRdy);
1270 goto txdone;
1271 }
1272 if (info->tty->stopped || info->tty->hw_stopped) {
1273 cy_writeb(base_addr + (CySRER << index),
1274 readb(base_addr + (CySRER << index)) &
1275 ~CyTxRdy);
1276 goto txdone;
1277 }
1278 /* Because the Embedded Transmit Commands have
1279 been enabled, we must check to see if the
1280 escape character, NULL, is being sent. If it
1281 is, we must ensure that there is room for it
1282 to be doubled in the output stream. Therefore
1283 we no longer advance the pointer when the
1284 character is fetched, but rather wait until
1285 after the check for a NULL output character.
1286 This is necessary because there may not be
1287 room for the two chars needed to send a NULL.)
1288 */
1289 outch = info->xmit_buf[info->xmit_tail];
1290 if (outch) {
1291 info->xmit_cnt--;
1292 info->xmit_tail = (info->xmit_tail + 1) &
1293 (SERIAL_XMIT_SIZE - 1);
1294 cy_writeb(base_addr + (CyTDR << index), outch);
1295 info->icount.tx++;
1296 } else {
1297 if (char_count > 1) {
1298 info->xmit_cnt--;
1299 info->xmit_tail = (info->xmit_tail + 1)&
1300 (SERIAL_XMIT_SIZE - 1);
1301 cy_writeb(base_addr + (CyTDR << index),
1302 outch);
1303 cy_writeb(base_addr + (CyTDR << index),
1304 0);
1305 info->icount.tx++;
1306 char_count--;
1307 } else {
1308 }
1309 }
1310 }
1311
1312 txdone:
1313 if (info->xmit_cnt < WAKEUP_CHARS) {
1314 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1315 }
1316 txend:
1317 /* end of service */
1318 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1319 cy_writeb(base_addr + (CyCAR << index), (save_car));
1320 spin_unlock(&cinfo->card_lock);
1321 }
1322
1323 if (status & CySRModem) { /* modem interrupt */
1324
1325 /* determine the channel & change to that context */
1326 spin_lock(&cinfo->card_lock);
1327 save_xir = (u_char) readb(base_addr + (CyMIR << index));
1328 channel = (u_short) (save_xir & CyIRChannel);
1329 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1330 save_car = readb(base_addr + (CyCAR << index));
1331 cy_writeb(base_addr + (CyCAR << index), save_xir);
1332
1333 mdm_change = readb(base_addr + (CyMISR << index));
1334 mdm_status = readb(base_addr + (CyMSVR1 << index));
1335
1336 if (info->tty == 0) { /* no place for data, ignore it */
1337 ;
1338 } else {
1339 if (mdm_change & CyANY_DELTA) {
1340 /* For statistics only */
1341 if (mdm_change & CyDCD)
1342 info->icount.dcd++;
1343 if (mdm_change & CyCTS)
1344 info->icount.cts++;
1345 if (mdm_change & CyDSR)
1346 info->icount.dsr++;
1347 if (mdm_change & CyRI)
1348 info->icount.rng++;
1349
1350 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1351 }
1352
1353 if ((mdm_change & CyDCD) &&
1354 (info->flags & ASYNC_CHECK_CD)) {
1355 if (mdm_status & CyDCD) {
1356 cy_sched_event(info,
1357 Cy_EVENT_OPEN_WAKEUP);
1358 } else {
1359 cy_sched_event(info, Cy_EVENT_HANGUP);
1360 }
1361 }
1362 if ((mdm_change & CyCTS) &&
1363 (info->flags & ASYNC_CTS_FLOW)) {
1364 if (info->tty->hw_stopped) {
1365 if (mdm_status & CyCTS) {
1366 /* cy_start isn't used
1367 because... !!! */
1368 info->tty->hw_stopped = 0;
1369 cy_writeb(base_addr +
1370 (CySRER << index),
1371 readb(base_addr +
1372 (CySRER <<
1373 index))|
1374 CyTxRdy);
1375 cy_sched_event(info,
1376 Cy_EVENT_WRITE_WAKEUP);
1377 }
1378 } else {
1379 if (!(mdm_status & CyCTS)) {
1380 /* cy_stop isn't used
1381 because ... !!! */
1382 info->tty->hw_stopped = 1;
1383 cy_writeb(base_addr +
1384 (CySRER << index),
1385 readb(base_addr +
1386 (CySRER <<
1387 index)) &
1388 ~CyTxRdy);
1389 }
1390 }
1391 }
1392 if (mdm_change & CyDSR) {
1393 }
1394 if (mdm_change & CyRI) {
1395 }
1396 }
1397 /* end of service */
1398 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1399 cy_writeb(base_addr + (CyCAR << index), save_car);
1400 spin_unlock(&cinfo->card_lock);
1401 }
1402 }
1403
1404 /* The real interrupt service routine is called
1405 whenever the card wants its hand held--chars
1406 received, out buffer empty, modem change, etc.
1407 */
1408 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1409 {
1410 int status;
1411 struct cyclades_card *cinfo;
1412 void __iomem *base_addr, *card_base_addr;
1413 int chip;
1414 int index;
1415 int too_many;
1416 int had_work;
1417
1418 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1419 #ifdef CY_DEBUG_INTERRUPTS
1420 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1421 #endif
1422 return IRQ_NONE; /* spurious interrupt */
1423 }
1424
1425 card_base_addr = cinfo->base_addr;
1426 index = cinfo->bus_index;
1427
1428 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1429 if (unlikely(card_base_addr == NULL))
1430 return IRQ_HANDLED;
1431
1432 /* This loop checks all chips in the card. Make a note whenever
1433 _any_ chip had some work to do, as this is considered an
1434 indication that there will be more to do. Only when no chip
1435 has any work does this outermost loop exit.
1436 */
1437 do {
1438 had_work = 0;
1439 for (chip = 0; chip < cinfo->num_chips; chip++) {
1440 base_addr = cinfo->base_addr +
1441 (cy_chip_offset[chip] << index);
1442 too_many = 0;
1443 while ((status = readb(base_addr +
1444 (CySVRR << index))) != 0x00) {
1445 had_work++;
1446 /* The purpose of the following test is to ensure that
1447 no chip can monopolize the driver. This forces the
1448 chips to be checked in a round-robin fashion (after
1449 draining each of a bunch (1000) of characters).
1450 */
1451 if (1000 < too_many++) {
1452 break;
1453 }
1454 cyy_intr_chip(cinfo, chip, base_addr, status,
1455 index);
1456 }
1457 }
1458 } while (had_work);
1459
1460 /* clear interrupts */
1461 spin_lock(&cinfo->card_lock);
1462 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1463 /* Cy_ClrIntr is 0x1800 */
1464 spin_unlock(&cinfo->card_lock);
1465 return IRQ_HANDLED;
1466 } /* cyy_interrupt */
1467
1468 /***********************************************************/
1469 /********* End of block of Cyclom-Y specific code **********/
1470 /******** Start of block of Cyclades-Z specific code *********/
1471 /***********************************************************/
1472
1473 static int
1474 cyz_fetch_msg(struct cyclades_card *cinfo,
1475 __u32 * channel, __u8 * cmd, __u32 * param)
1476 {
1477 struct FIRM_ID __iomem *firm_id;
1478 struct ZFW_CTRL __iomem *zfw_ctrl;
1479 struct BOARD_CTRL __iomem *board_ctrl;
1480 unsigned long loc_doorbell;
1481
1482 firm_id = cinfo->base_addr + ID_ADDRESS;
1483 if (!ISZLOADED(*cinfo)) {
1484 return -1;
1485 }
1486 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1487 board_ctrl = &zfw_ctrl->board_ctrl;
1488
1489 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1490 (cinfo->ctl_addr))->loc_doorbell);
1491 if (loc_doorbell) {
1492 *cmd = (char)(0xff & loc_doorbell);
1493 *channel = readl(&board_ctrl->fwcmd_channel);
1494 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1495 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1496 loc_doorbell, 0xffffffff);
1497 return 1;
1498 }
1499 return 0;
1500 } /* cyz_fetch_msg */
1501
1502 static int
1503 cyz_issue_cmd(struct cyclades_card *cinfo,
1504 __u32 channel, __u8 cmd, __u32 param)
1505 {
1506 struct FIRM_ID __iomem *firm_id;
1507 struct ZFW_CTRL __iomem *zfw_ctrl;
1508 struct BOARD_CTRL __iomem *board_ctrl;
1509 __u32 __iomem *pci_doorbell;
1510 int index;
1511
1512 firm_id = cinfo->base_addr + ID_ADDRESS;
1513 if (!ISZLOADED(*cinfo)) {
1514 return -1;
1515 }
1516 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1517 board_ctrl = &zfw_ctrl->board_ctrl;
1518
1519 index = 0;
1520 pci_doorbell =
1521 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1522 while ((readl(pci_doorbell) & 0xff) != 0) {
1523 if (index++ == 1000) {
1524 return (int)(readl(pci_doorbell) & 0xff);
1525 }
1526 udelay(50L);
1527 }
1528 cy_writel(&board_ctrl->hcmd_channel, channel);
1529 cy_writel(&board_ctrl->hcmd_param, param);
1530 cy_writel(pci_doorbell, (long)cmd);
1531
1532 return 0;
1533 } /* cyz_issue_cmd */
1534
1535 static void
1536 cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1537 struct BUF_CTRL __iomem *buf_ctrl)
1538 {
1539 struct cyclades_card *cinfo = info->card;
1540 struct tty_struct *tty = info->tty;
1541 int char_count;
1542 int len;
1543 #ifdef BLOCKMOVE
1544 unsigned char *buf;
1545 #else
1546 char data;
1547 #endif
1548 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1549
1550 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1551 rx_put = readl(&buf_ctrl->rx_put);
1552 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1553 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1554 if (rx_put >= rx_get)
1555 char_count = rx_put - rx_get;
1556 else
1557 char_count = rx_put - rx_get + rx_bufsize;
1558
1559 if (char_count) {
1560 #ifdef CY_ENABLE_MONITORING
1561 info->mon.int_count++;
1562 info->mon.char_count += char_count;
1563 if (char_count > info->mon.char_max)
1564 info->mon.char_max = char_count;
1565 info->mon.char_last = char_count;
1566 #endif
1567 if (tty == 0) {
1568 /* flush received characters */
1569 new_rx_get = (new_rx_get + char_count) &
1570 (rx_bufsize - 1);
1571 info->rflush_count++;
1572 } else {
1573 #ifdef BLOCKMOVE
1574 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1575 for performance, but because of buffer boundaries, there
1576 may be several steps to the operation */
1577 while (1) {
1578 len = tty_prepare_flip_string(tty, &buf,
1579 char_count);
1580 if (!len)
1581 break;
1582
1583 len = min_t(unsigned int, min(len, char_count),
1584 rx_bufsize - new_rx_get);
1585
1586 memcpy_fromio(buf, cinfo->base_addr +
1587 rx_bufaddr + new_rx_get, len);
1588
1589 new_rx_get = (new_rx_get + len) &
1590 (rx_bufsize - 1);
1591 char_count -= len;
1592 info->icount.rx += len;
1593 info->idle_stats.recv_bytes += len;
1594 }
1595 #else
1596 len = tty_buffer_request_room(tty, char_count);
1597 while (len--) {
1598 data = readb(cinfo->base_addr + rx_bufaddr +
1599 new_rx_get);
1600 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1601 tty_insert_flip_char(tty, data, TTY_NORMAL);
1602 info->idle_stats.recv_bytes++;
1603 info->icount.rx++;
1604 }
1605 #endif
1606 #ifdef CONFIG_CYZ_INTR
1607 /* Recalculate the number of chars in the RX buffer and issue
1608 a cmd in case it's higher than the RX high water mark */
1609 rx_put = readl(&buf_ctrl->rx_put);
1610 if (rx_put >= rx_get)
1611 char_count = rx_put - rx_get;
1612 else
1613 char_count = rx_put - rx_get + rx_bufsize;
1614 if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
1615 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1616 }
1617 #endif
1618 info->idle_stats.recv_idle = jiffies;
1619 tty_schedule_flip(tty);
1620 }
1621 /* Update rx_get */
1622 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1623 }
1624 }
1625
1626 static void
1627 cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1628 struct BUF_CTRL __iomem *buf_ctrl)
1629 {
1630 struct cyclades_card *cinfo = info->card;
1631 struct tty_struct *tty = info->tty;
1632 char data;
1633 int char_count;
1634 #ifdef BLOCKMOVE
1635 int small_count;
1636 #endif
1637 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1638
1639 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1640 return;
1641
1642 tx_get = readl(&buf_ctrl->tx_get);
1643 tx_put = readl(&buf_ctrl->tx_put);
1644 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1645 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1646 if (tx_put >= tx_get)
1647 char_count = tx_get - tx_put - 1 + tx_bufsize;
1648 else
1649 char_count = tx_get - tx_put - 1;
1650
1651 if (char_count) {
1652
1653 if (tty == 0) {
1654 goto ztxdone;
1655 }
1656
1657 if (info->x_char) { /* send special char */
1658 data = info->x_char;
1659
1660 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1661 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1662 info->x_char = 0;
1663 char_count--;
1664 info->icount.tx++;
1665 }
1666 #ifdef BLOCKMOVE
1667 while (0 < (small_count = min_t(unsigned int,
1668 tx_bufsize - tx_put, min_t(unsigned int,
1669 (SERIAL_XMIT_SIZE - info->xmit_tail),
1670 min_t(unsigned int, info->xmit_cnt,
1671 char_count))))) {
1672
1673 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1674 tx_put),
1675 &info->xmit_buf[info->xmit_tail],
1676 small_count);
1677
1678 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1679 char_count -= small_count;
1680 info->icount.tx += small_count;
1681 info->xmit_cnt -= small_count;
1682 info->xmit_tail = (info->xmit_tail + small_count) &
1683 (SERIAL_XMIT_SIZE - 1);
1684 }
1685 #else
1686 while (info->xmit_cnt && char_count) {
1687 data = info->xmit_buf[info->xmit_tail];
1688 info->xmit_cnt--;
1689 info->xmit_tail = (info->xmit_tail + 1) &
1690 (SERIAL_XMIT_SIZE - 1);
1691
1692 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1693 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1694 char_count--;
1695 info->icount.tx++;
1696 }
1697 #endif
1698 ztxdone:
1699 if (info->xmit_cnt < WAKEUP_CHARS) {
1700 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1701 }
1702 /* Update tx_put */
1703 cy_writel(&buf_ctrl->tx_put, tx_put);
1704 }
1705 }
1706
1707 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1708 {
1709 struct tty_struct *tty;
1710 struct cyclades_port *info;
1711 static struct FIRM_ID __iomem *firm_id;
1712 static struct ZFW_CTRL __iomem *zfw_ctrl;
1713 static struct BOARD_CTRL __iomem *board_ctrl;
1714 static struct CH_CTRL __iomem *ch_ctrl;
1715 static struct BUF_CTRL __iomem *buf_ctrl;
1716 __u32 channel;
1717 __u8 cmd;
1718 __u32 param;
1719 __u32 hw_ver, fw_ver;
1720 int special_count;
1721 int delta_count;
1722
1723 firm_id = cinfo->base_addr + ID_ADDRESS;
1724 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1725 board_ctrl = &zfw_ctrl->board_ctrl;
1726 fw_ver = readl(&board_ctrl->fw_version);
1727 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1728 mail_box_0);
1729
1730 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1731 special_count = 0;
1732 delta_count = 0;
1733 info = &cy_port[channel + cinfo->first_line];
1734 if ((tty = info->tty) == 0) {
1735 continue;
1736 }
1737 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1738 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1739
1740 switch (cmd) {
1741 case C_CM_PR_ERROR:
1742 tty_insert_flip_char(tty, 0, TTY_PARITY);
1743 info->icount.rx++;
1744 special_count++;
1745 break;
1746 case C_CM_FR_ERROR:
1747 tty_insert_flip_char(tty, 0, TTY_FRAME);
1748 info->icount.rx++;
1749 special_count++;
1750 break;
1751 case C_CM_RXBRK:
1752 tty_insert_flip_char(tty, 0, TTY_BREAK);
1753 info->icount.rx++;
1754 special_count++;
1755 break;
1756 case C_CM_MDCD:
1757 info->icount.dcd++;
1758 delta_count++;
1759 if (info->flags & ASYNC_CHECK_CD) {
1760 if ((fw_ver > 241 ? ((u_long) param) :
1761 readl(&ch_ctrl->rs_status)) &
1762 C_RS_DCD) {
1763 cy_sched_event(info,
1764 Cy_EVENT_OPEN_WAKEUP);
1765 } else {
1766 cy_sched_event(info, Cy_EVENT_HANGUP);
1767 }
1768 }
1769 break;
1770 case C_CM_MCTS:
1771 info->icount.cts++;
1772 delta_count++;
1773 break;
1774 case C_CM_MRI:
1775 info->icount.rng++;
1776 delta_count++;
1777 break;
1778 case C_CM_MDSR:
1779 info->icount.dsr++;
1780 delta_count++;
1781 break;
1782 #ifdef Z_WAKE
1783 case C_CM_IOCTLW:
1784 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1785 break;
1786 #endif
1787 #ifdef CONFIG_CYZ_INTR
1788 case C_CM_RXHIWM:
1789 case C_CM_RXNNDT:
1790 case C_CM_INTBACK2:
1791 /* Reception Interrupt */
1792 #ifdef CY_DEBUG_INTERRUPTS
1793 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1794 "port %ld\n", info->card, channel);
1795 #endif
1796 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1797 break;
1798 case C_CM_TXBEMPTY:
1799 case C_CM_TXLOWWM:
1800 case C_CM_INTBACK:
1801 /* Transmission Interrupt */
1802 #ifdef CY_DEBUG_INTERRUPTS
1803 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1804 "port %ld\n", info->card, channel);
1805 #endif
1806 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1807 break;
1808 #endif /* CONFIG_CYZ_INTR */
1809 case C_CM_FATAL:
1810 /* should do something with this !!! */
1811 break;
1812 default:
1813 break;
1814 }
1815 if (delta_count)
1816 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1817 if (special_count)
1818 tty_schedule_flip(tty);
1819 }
1820 }
1821
1822 #ifdef CONFIG_CYZ_INTR
1823 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1824 {
1825 struct cyclades_card *cinfo;
1826
1827 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1828 #ifdef CY_DEBUG_INTERRUPTS
1829 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1830 #endif
1831 return IRQ_NONE; /* spurious interrupt */
1832 }
1833
1834 if (!ISZLOADED(*cinfo)) {
1835 #ifdef CY_DEBUG_INTERRUPTS
1836 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1837 "(IRQ%d).\n", irq);
1838 #endif
1839 return IRQ_NONE;
1840 }
1841
1842 /* Handle the interrupts */
1843 cyz_handle_cmd(cinfo);
1844
1845 return IRQ_HANDLED;
1846 } /* cyz_interrupt */
1847
1848 static void cyz_rx_restart(unsigned long arg)
1849 {
1850 struct cyclades_port *info = (struct cyclades_port *)arg;
1851 struct cyclades_card *card = info->card;
1852 int retval;
1853 __u32 channel = info->line - card->first_line;
1854 unsigned long flags;
1855
1856 spin_lock_irqsave(&card->card_lock, flags);
1857 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1858 if (retval != 0) {
1859 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1860 info->line, retval);
1861 }
1862 spin_unlock_irqrestore(&card->card_lock, flags);
1863 }
1864
1865 #else /* CONFIG_CYZ_INTR */
1866
1867 static void cyz_poll(unsigned long arg)
1868 {
1869 struct cyclades_card *cinfo;
1870 struct cyclades_port *info;
1871 struct tty_struct *tty;
1872 static struct FIRM_ID *firm_id;
1873 static struct ZFW_CTRL *zfw_ctrl;
1874 static struct BOARD_CTRL *board_ctrl;
1875 static struct CH_CTRL *ch_ctrl;
1876 static struct BUF_CTRL *buf_ctrl;
1877 unsigned long expires = jiffies + HZ;
1878 int card, port;
1879
1880 for (card = 0; card < NR_CARDS; card++) {
1881 cinfo = &cy_card[card];
1882
1883 if (!IS_CYC_Z(*cinfo))
1884 continue;
1885 if (!ISZLOADED(*cinfo))
1886 continue;
1887
1888 firm_id = cinfo->base_addr + ID_ADDRESS;
1889 zfw_ctrl = cinfo->base_addr +
1890 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1891 board_ctrl = &(zfw_ctrl->board_ctrl);
1892
1893 /* Skip first polling cycle to avoid racing conditions with the FW */
1894 if (!cinfo->intr_enabled) {
1895 cinfo->nports = (int)readl(&board_ctrl->n_channel);
1896 cinfo->intr_enabled = 1;
1897 continue;
1898 }
1899
1900 cyz_handle_cmd(cinfo);
1901
1902 for (port = 0; port < cinfo->nports; port++) {
1903 info = &cy_port[port + cinfo->first_line];
1904 tty = info->tty;
1905 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1906 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1907
1908 if (!info->throttle)
1909 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1910 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1911 }
1912 /* poll every 'cyz_polling_cycle' period */
1913 expires = jiffies + cyz_polling_cycle;
1914 }
1915 mod_timer(&cyz_timerlist, expires);
1916 } /* cyz_poll */
1917
1918 #endif /* CONFIG_CYZ_INTR */
1919
1920 /********** End of block of Cyclades-Z specific code *********/
1921 /***********************************************************/
1922
1923 /* This is called whenever a port becomes active;
1924 interrupts are enabled and DTR & RTS are turned on.
1925 */
1926 static int startup(struct cyclades_port *info)
1927 {
1928 struct cyclades_card *card;
1929 unsigned long flags;
1930 int retval = 0;
1931 void __iomem *base_addr;
1932 int chip, channel, index;
1933 unsigned long page;
1934
1935 card = info->card;
1936 channel = info->line - card->first_line;
1937
1938 page = get_zeroed_page(GFP_KERNEL);
1939 if (!page)
1940 return -ENOMEM;
1941
1942 spin_lock_irqsave(&card->card_lock, flags);
1943
1944 if (info->flags & ASYNC_INITIALIZED) {
1945 free_page(page);
1946 goto errout;
1947 }
1948
1949 if (!info->type) {
1950 if (info->tty) {
1951 set_bit(TTY_IO_ERROR, &info->tty->flags);
1952 }
1953 free_page(page);
1954 goto errout;
1955 }
1956
1957 if (info->xmit_buf)
1958 free_page(page);
1959 else
1960 info->xmit_buf = (unsigned char *)page;
1961
1962 spin_unlock_irqrestore(&card->card_lock, flags);
1963
1964 set_line_char(info);
1965
1966 if (!IS_CYC_Z(*card)) {
1967 chip = channel >> 2;
1968 channel &= 0x03;
1969 index = card->bus_index;
1970 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1971
1972 #ifdef CY_DEBUG_OPEN
1973 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1974 "base_addr %p\n",
1975 card, chip, channel, base_addr);
1976 #endif
1977 spin_lock_irqsave(&card->card_lock, flags);
1978
1979 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1980
1981 cy_writeb(base_addr + (CyRTPR << index),
1982 (info->default_timeout ? info->default_timeout : 0x02));
1983 /* 10ms rx timeout */
1984
1985 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1986 index);
1987
1988 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1989 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1990 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1991
1992 #ifdef CY_DEBUG_DTR
1993 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1994 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
1995 readb(base_addr + (CyMSVR1 << index)),
1996 readb(base_addr + (CyMSVR2 << index)));
1997 #endif
1998
1999 cy_writeb(base_addr + (CySRER << index),
2000 readb(base_addr + (CySRER << index)) | CyRxData);
2001 info->flags |= ASYNC_INITIALIZED;
2002
2003 if (info->tty) {
2004 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2005 }
2006 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2007 info->breakon = info->breakoff = 0;
2008 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2009 info->idle_stats.in_use =
2010 info->idle_stats.recv_idle =
2011 info->idle_stats.xmit_idle = jiffies;
2012
2013 spin_unlock_irqrestore(&card->card_lock, flags);
2014
2015 } else {
2016 struct FIRM_ID __iomem *firm_id;
2017 struct ZFW_CTRL __iomem *zfw_ctrl;
2018 struct BOARD_CTRL __iomem *board_ctrl;
2019 struct CH_CTRL __iomem *ch_ctrl;
2020 int retval;
2021
2022 base_addr = card->base_addr;
2023
2024 firm_id = base_addr + ID_ADDRESS;
2025 if (!ISZLOADED(*card)) {
2026 return -ENODEV;
2027 }
2028
2029 zfw_ctrl = card->base_addr +
2030 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2031 board_ctrl = &zfw_ctrl->board_ctrl;
2032 ch_ctrl = zfw_ctrl->ch_ctrl;
2033
2034 #ifdef CY_DEBUG_OPEN
2035 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
2036 "base_addr %p\n", card, channel, base_addr);
2037 #endif
2038 spin_lock_irqsave(&card->card_lock, flags);
2039
2040 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2041 #ifdef Z_WAKE
2042 #ifdef CONFIG_CYZ_INTR
2043 cy_writel(&ch_ctrl[channel].intr_enable,
2044 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2045 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2046 #else
2047 cy_writel(&ch_ctrl[channel].intr_enable,
2048 C_IN_IOCTLW | C_IN_MDCD);
2049 #endif /* CONFIG_CYZ_INTR */
2050 #else
2051 #ifdef CONFIG_CYZ_INTR
2052 cy_writel(&ch_ctrl[channel].intr_enable,
2053 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2054 C_IN_RXNNDT | C_IN_MDCD);
2055 #else
2056 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2057 #endif /* CONFIG_CYZ_INTR */
2058 #endif /* Z_WAKE */
2059
2060 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2061 if (retval != 0) {
2062 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
2063 "%x\n", info->line, retval);
2064 }
2065
2066 /* Flush RX buffers before raising DTR and RTS */
2067 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
2068 if (retval != 0) {
2069 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
2070 "%x\n", info->line, retval);
2071 }
2072
2073 /* set timeout !!! */
2074 /* set RTS and DTR !!! */
2075 cy_writel(&ch_ctrl[channel].rs_control,
2076 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2077 C_RS_DTR);
2078 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2079 if (retval != 0) {
2080 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
2081 "%x\n", info->line, retval);
2082 }
2083 #ifdef CY_DEBUG_DTR
2084 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
2085 #endif
2086
2087 /* enable send, recv, modem !!! */
2088
2089 info->flags |= ASYNC_INITIALIZED;
2090 if (info->tty) {
2091 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2092 }
2093 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2094 info->breakon = info->breakoff = 0;
2095 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2096 info->idle_stats.in_use =
2097 info->idle_stats.recv_idle =
2098 info->idle_stats.xmit_idle = jiffies;
2099
2100 spin_unlock_irqrestore(&card->card_lock, flags);
2101 }
2102
2103 #ifdef CY_DEBUG_OPEN
2104 printk(KERN_DEBUG "cyc startup done\n");
2105 #endif
2106 return 0;
2107
2108 errout:
2109 spin_unlock_irqrestore(&card->card_lock, flags);
2110 return retval;
2111 } /* startup */
2112
2113 static void start_xmit(struct cyclades_port *info)
2114 {
2115 struct cyclades_card *card;
2116 unsigned long flags;
2117 void __iomem *base_addr;
2118 int chip, channel, index;
2119
2120 card = info->card;
2121 channel = info->line - card->first_line;
2122 if (!IS_CYC_Z(*card)) {
2123 chip = channel >> 2;
2124 channel &= 0x03;
2125 index = card->bus_index;
2126 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2127
2128 spin_lock_irqsave(&card->card_lock, flags);
2129 cy_writeb(base_addr + (CyCAR << index), channel);
2130 cy_writeb(base_addr + (CySRER << index),
2131 readb(base_addr + (CySRER << index)) | CyTxRdy);
2132 spin_unlock_irqrestore(&card->card_lock, flags);
2133 } else {
2134 #ifdef CONFIG_CYZ_INTR
2135 int retval;
2136
2137 spin_lock_irqsave(&card->card_lock, flags);
2138 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2139 if (retval != 0) {
2140 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2141 "%x\n", info->line, retval);
2142 }
2143 spin_unlock_irqrestore(&card->card_lock, flags);
2144 #else /* CONFIG_CYZ_INTR */
2145 /* Don't have to do anything at this time */
2146 #endif /* CONFIG_CYZ_INTR */
2147 }
2148 } /* start_xmit */
2149
2150 /*
2151 * This routine shuts down a serial port; interrupts are disabled,
2152 * and DTR is dropped if the hangup on close termio flag is on.
2153 */
2154 static void shutdown(struct cyclades_port *info)
2155 {
2156 struct cyclades_card *card;
2157 unsigned long flags;
2158 void __iomem *base_addr;
2159 int chip, channel, index;
2160
2161 if (!(info->flags & ASYNC_INITIALIZED)) {
2162 return;
2163 }
2164
2165 card = info->card;
2166 channel = info->line - card->first_line;
2167 if (!IS_CYC_Z(*card)) {
2168 chip = channel >> 2;
2169 channel &= 0x03;
2170 index = card->bus_index;
2171 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2172
2173 #ifdef CY_DEBUG_OPEN
2174 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2175 "channel %d, base_addr %p\n",
2176 card, chip, channel, base_addr);
2177 #endif
2178
2179 spin_lock_irqsave(&card->card_lock, flags);
2180
2181 /* Clear delta_msr_wait queue to avoid mem leaks. */
2182 wake_up_interruptible(&info->delta_msr_wait);
2183
2184 if (info->xmit_buf) {
2185 unsigned char *temp;
2186 temp = info->xmit_buf;
2187 info->xmit_buf = NULL;
2188 free_page((unsigned long)temp);
2189 }
2190 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2191 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2192 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2193 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2194 #ifdef CY_DEBUG_DTR
2195 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2196 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2197 readb(base_addr + (CyMSVR1 << index)),
2198 readb(base_addr + (CyMSVR2 << index)));
2199 #endif
2200 }
2201 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2202 /* it may be appropriate to clear _XMIT at
2203 some later date (after testing)!!! */
2204
2205 if (info->tty) {
2206 set_bit(TTY_IO_ERROR, &info->tty->flags);
2207 }
2208 info->flags &= ~ASYNC_INITIALIZED;
2209 spin_unlock_irqrestore(&card->card_lock, flags);
2210 } else {
2211 struct FIRM_ID __iomem *firm_id;
2212 struct ZFW_CTRL __iomem *zfw_ctrl;
2213 struct BOARD_CTRL __iomem *board_ctrl;
2214 struct CH_CTRL __iomem *ch_ctrl;
2215 int retval;
2216
2217 base_addr = card->base_addr;
2218 #ifdef CY_DEBUG_OPEN
2219 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2220 "base_addr %p\n", card, channel, base_addr);
2221 #endif
2222
2223 firm_id = base_addr + ID_ADDRESS;
2224 if (!ISZLOADED(*card)) {
2225 return;
2226 }
2227
2228 zfw_ctrl = card->base_addr +
2229 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2230 board_ctrl = &zfw_ctrl->board_ctrl;
2231 ch_ctrl = zfw_ctrl->ch_ctrl;
2232
2233 spin_lock_irqsave(&card->card_lock, flags);
2234
2235 if (info->xmit_buf) {
2236 unsigned char *temp;
2237 temp = info->xmit_buf;
2238 info->xmit_buf = NULL;
2239 free_page((unsigned long)temp);
2240 }
2241
2242 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2243 cy_writel(&ch_ctrl[channel].rs_control,
2244 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2245 ~(C_RS_RTS | C_RS_DTR)));
2246 retval = cyz_issue_cmd(info->card, channel,
2247 C_CM_IOCTLM, 0L);
2248 if (retval != 0) {
2249 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2250 "was %x\n", info->line, retval);
2251 }
2252 #ifdef CY_DEBUG_DTR
2253 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2254 #endif
2255 }
2256
2257 if (info->tty) {
2258 set_bit(TTY_IO_ERROR, &info->tty->flags);
2259 }
2260 info->flags &= ~ASYNC_INITIALIZED;
2261
2262 spin_unlock_irqrestore(&card->card_lock, flags);
2263 }
2264
2265 #ifdef CY_DEBUG_OPEN
2266 printk(KERN_DEBUG "cyc shutdown done\n");
2267 #endif
2268 } /* shutdown */
2269
2270 /*
2271 * ------------------------------------------------------------
2272 * cy_open() and friends
2273 * ------------------------------------------------------------
2274 */
2275
2276 static int
2277 block_til_ready(struct tty_struct *tty, struct file *filp,
2278 struct cyclades_port *info)
2279 {
2280 DECLARE_WAITQUEUE(wait, current);
2281 struct cyclades_card *cinfo;
2282 unsigned long flags;
2283 int chip, channel, index;
2284 int retval;
2285 void __iomem *base_addr;
2286
2287 cinfo = info->card;
2288 channel = info->line - cinfo->first_line;
2289
2290 /*
2291 * If the device is in the middle of being closed, then block
2292 * until it's done, and then try again.
2293 */
2294 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2295 wait_event_interruptible(info->close_wait,
2296 !(info->flags & ASYNC_CLOSING));
2297 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2298 }
2299
2300 /*
2301 * If non-blocking mode is set, then make the check up front
2302 * and then exit.
2303 */
2304 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2305 info->flags |= ASYNC_NORMAL_ACTIVE;
2306 return 0;
2307 }
2308
2309 /*
2310 * Block waiting for the carrier detect and the line to become
2311 * free (i.e., not in use by the callout). While we are in
2312 * this loop, info->count is dropped by one, so that
2313 * cy_close() knows when to free things. We restore it upon
2314 * exit, either normal or abnormal.
2315 */
2316 retval = 0;
2317 add_wait_queue(&info->open_wait, &wait);
2318 #ifdef CY_DEBUG_OPEN
2319 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2320 "count = %d\n", info->line, info->count);
2321 #endif
2322 spin_lock_irqsave(&cinfo->card_lock, flags);
2323 if (!tty_hung_up_p(filp))
2324 info->count--;
2325 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2326 #ifdef CY_DEBUG_COUNT
2327 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2328 "%d\n", current->pid, info->count);
2329 #endif
2330 info->blocked_open++;
2331
2332 if (!IS_CYC_Z(*cinfo)) {
2333 chip = channel >> 2;
2334 channel &= 0x03;
2335 index = cinfo->bus_index;
2336 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2337
2338 while (1) {
2339 spin_lock_irqsave(&cinfo->card_lock, flags);
2340 if ((tty->termios->c_cflag & CBAUD)) {
2341 cy_writeb(base_addr + (CyCAR << index),
2342 (u_char) channel);
2343 cy_writeb(base_addr + (CyMSVR1 << index),
2344 CyRTS);
2345 cy_writeb(base_addr + (CyMSVR2 << index),
2346 CyDTR);
2347 #ifdef CY_DEBUG_DTR
2348 printk(KERN_DEBUG "cyc:block_til_ready raising "
2349 "DTR\n");
2350 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2351 readb(base_addr + (CyMSVR1 << index)),
2352 readb(base_addr + (CyMSVR2 << index)));
2353 #endif
2354 }
2355 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2356
2357 set_current_state(TASK_INTERRUPTIBLE);
2358 if (tty_hung_up_p(filp) ||
2359 !(info->flags & ASYNC_INITIALIZED)) {
2360 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2361 -EAGAIN : -ERESTARTSYS);
2362 break;
2363 }
2364
2365 spin_lock_irqsave(&cinfo->card_lock, flags);
2366 cy_writeb(base_addr + (CyCAR << index),
2367 (u_char) channel);
2368 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2369 (readb(base_addr +
2370 (CyMSVR1 << index)) & CyDCD))) {
2371 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2372 break;
2373 }
2374 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2375
2376 if (signal_pending(current)) {
2377 retval = -ERESTARTSYS;
2378 break;
2379 }
2380 #ifdef CY_DEBUG_OPEN
2381 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2382 "ttyC%d, count = %d\n",
2383 info->line, info->count);
2384 #endif
2385 schedule();
2386 }
2387 } else {
2388 struct FIRM_ID __iomem *firm_id;
2389 struct ZFW_CTRL __iomem *zfw_ctrl;
2390 struct BOARD_CTRL __iomem *board_ctrl;
2391 struct CH_CTRL __iomem *ch_ctrl;
2392 int retval;
2393
2394 base_addr = cinfo->base_addr;
2395 firm_id = base_addr + ID_ADDRESS;
2396 if (!ISZLOADED(*cinfo)) {
2397 __set_current_state(TASK_RUNNING);
2398 remove_wait_queue(&info->open_wait, &wait);
2399 return -EINVAL;
2400 }
2401
2402 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2403 board_ctrl = &zfw_ctrl->board_ctrl;
2404 ch_ctrl = zfw_ctrl->ch_ctrl;
2405
2406 while (1) {
2407 if ((tty->termios->c_cflag & CBAUD)) {
2408 cy_writel(&ch_ctrl[channel].rs_control,
2409 readl(&ch_ctrl[channel].rs_control) |
2410 C_RS_RTS | C_RS_DTR);
2411 retval = cyz_issue_cmd(cinfo,
2412 channel, C_CM_IOCTLM, 0L);
2413 if (retval != 0) {
2414 printk(KERN_ERR "cyc:block_til_ready "
2415 "retval on ttyC%d was %x\n",
2416 info->line, retval);
2417 }
2418 #ifdef CY_DEBUG_DTR
2419 printk(KERN_DEBUG "cyc:block_til_ready raising "
2420 "Z DTR\n");
2421 #endif
2422 }
2423
2424 set_current_state(TASK_INTERRUPTIBLE);
2425 if (tty_hung_up_p(filp) ||
2426 !(info->flags & ASYNC_INITIALIZED)) {
2427 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2428 -EAGAIN : -ERESTARTSYS);
2429 break;
2430 }
2431 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2432 (readl(&ch_ctrl[channel].rs_status) &
2433 C_RS_DCD))) {
2434 break;
2435 }
2436 if (signal_pending(current)) {
2437 retval = -ERESTARTSYS;
2438 break;
2439 }
2440 #ifdef CY_DEBUG_OPEN
2441 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2442 "ttyC%d, count = %d\n",
2443 info->line, info->count);
2444 #endif
2445 schedule();
2446 }
2447 }
2448 __set_current_state(TASK_RUNNING);
2449 remove_wait_queue(&info->open_wait, &wait);
2450 if (!tty_hung_up_p(filp)) {
2451 info->count++;
2452 #ifdef CY_DEBUG_COUNT
2453 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2454 "count to %d\n", current->pid, info->count);
2455 #endif
2456 }
2457 info->blocked_open--;
2458 #ifdef CY_DEBUG_OPEN
2459 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2460 "count = %d\n", info->line, info->count);
2461 #endif
2462 if (retval)
2463 return retval;
2464 info->flags |= ASYNC_NORMAL_ACTIVE;
2465 return 0;
2466 } /* block_til_ready */
2467
2468 /*
2469 * This routine is called whenever a serial port is opened. It
2470 * performs the serial-specific initialization for the tty structure.
2471 */
2472 static int cy_open(struct tty_struct *tty, struct file *filp)
2473 {
2474 struct cyclades_port *info;
2475 int retval, line;
2476
2477 line = tty->index;
2478 if ((line < 0) || (NR_PORTS <= line)) {
2479 return -ENODEV;
2480 }
2481 info = &cy_port[line];
2482 if (info->line < 0) {
2483 return -ENODEV;
2484 }
2485
2486 /* If the card's firmware hasn't been loaded,
2487 treat it as absent from the system. This
2488 will make the user pay attention.
2489 */
2490 if (IS_CYC_Z(*info->card)) {
2491 struct cyclades_card *cinfo = info->card;
2492 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2493
2494 if (!ISZLOADED(*cinfo)) {
2495 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2496 (cinfo->ctl_addr))->mail_box_0)) &&
2497 Z_FPGA_CHECK(*cinfo)) &&
2498 (ZFIRM_HLT == readl(
2499 &firm_id->signature))) {
2500 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2501 "need an external power supply for "
2502 "this number of ports.\nFirmware "
2503 "halted.\n");
2504 } else {
2505 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2506 "yet loaded\n");
2507 }
2508 return -ENODEV;
2509 }
2510 #ifdef CONFIG_CYZ_INTR
2511 else {
2512 /* In case this Z board is operating in interrupt mode, its
2513 interrupts should be enabled as soon as the first open
2514 happens to one of its ports. */
2515 if (!cinfo->intr_enabled) {
2516 struct ZFW_CTRL __iomem *zfw_ctrl;
2517 struct BOARD_CTRL __iomem *board_ctrl;
2518
2519 zfw_ctrl = cinfo->base_addr +
2520 (readl(&firm_id->zfwctrl_addr) &
2521 0xfffff);
2522
2523 board_ctrl = &zfw_ctrl->board_ctrl;
2524
2525 /* Enable interrupts on the PLX chip */
2526 cy_writew(cinfo->ctl_addr + 0x68,
2527 readw(cinfo->ctl_addr + 0x68) | 0x0900);
2528 /* Enable interrupts on the FW */
2529 retval = cyz_issue_cmd(cinfo, 0,
2530 C_CM_IRQ_ENBL, 0L);
2531 if (retval != 0) {
2532 printk(KERN_ERR "cyc:IRQ enable retval "
2533 "was %x\n", retval);
2534 }
2535 cinfo->nports =
2536 (int)readl(&board_ctrl->n_channel);
2537 cinfo->intr_enabled = 1;
2538 }
2539 }
2540 #endif /* CONFIG_CYZ_INTR */
2541 /* Make sure this Z port really exists in hardware */
2542 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2543 return -ENODEV;
2544 }
2545 #ifdef CY_DEBUG_OTHER
2546 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2547 #endif
2548 tty->driver_data = info;
2549 info->tty = tty;
2550 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2551 return -ENODEV;
2552 }
2553 #ifdef CY_DEBUG_OPEN
2554 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2555 info->count);
2556 #endif
2557 info->count++;
2558 #ifdef CY_DEBUG_COUNT
2559 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2560 current->pid, info->count);
2561 #endif
2562
2563 /*
2564 * If the port is the middle of closing, bail out now
2565 */
2566 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2567 wait_event_interruptible(info->close_wait,
2568 !(info->flags & ASYNC_CLOSING));
2569 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2570 }
2571
2572 /*
2573 * Start up serial port
2574 */
2575 retval = startup(info);
2576 if (retval) {
2577 return retval;
2578 }
2579
2580 retval = block_til_ready(tty, filp, info);
2581 if (retval) {
2582 #ifdef CY_DEBUG_OPEN
2583 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2584 "with %d\n", retval);
2585 #endif
2586 return retval;
2587 }
2588
2589 info->throttle = 0;
2590
2591 #ifdef CY_DEBUG_OPEN
2592 printk(KERN_DEBUG "cyc:cy_open done\n");
2593 #endif
2594 return 0;
2595 } /* cy_open */
2596
2597 /*
2598 * cy_wait_until_sent() --- wait until the transmitter is empty
2599 */
2600 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2601 {
2602 struct cyclades_card *card;
2603 struct cyclades_port *info = tty->driver_data;
2604 void __iomem *base_addr;
2605 int chip, channel, index;
2606 unsigned long orig_jiffies;
2607 int char_time;
2608
2609 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2610 return;
2611
2612 if (info->xmit_fifo_size == 0)
2613 return; /* Just in case.... */
2614
2615 orig_jiffies = jiffies;
2616 /*
2617 * Set the check interval to be 1/5 of the estimated time to
2618 * send a single character, and make it at least 1. The check
2619 * interval should also be less than the timeout.
2620 *
2621 * Note: we have to use pretty tight timings here to satisfy
2622 * the NIST-PCTS.
2623 */
2624 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2625 char_time = char_time / 5;
2626 if (char_time <= 0)
2627 char_time = 1;
2628 if (timeout < 0)
2629 timeout = 0;
2630 if (timeout)
2631 char_time = min(char_time, timeout);
2632 /*
2633 * If the transmitter hasn't cleared in twice the approximate
2634 * amount of time to send the entire FIFO, it probably won't
2635 * ever clear. This assumes the UART isn't doing flow
2636 * control, which is currently the case. Hence, if it ever
2637 * takes longer than info->timeout, this is probably due to a
2638 * UART bug of some kind. So, we clamp the timeout parameter at
2639 * 2*info->timeout.
2640 */
2641 if (!timeout || timeout > 2 * info->timeout)
2642 timeout = 2 * info->timeout;
2643 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2644 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2645 timeout, char_time, jiffies);
2646 #endif
2647 card = info->card;
2648 channel = (info->line) - (card->first_line);
2649 if (!IS_CYC_Z(*card)) {
2650 chip = channel >> 2;
2651 channel &= 0x03;
2652 index = card->bus_index;
2653 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2654 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2655 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2656 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2657 #endif
2658 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2659 break;
2660 if (timeout && time_after(jiffies, orig_jiffies +
2661 timeout))
2662 break;
2663 }
2664 } else {
2665 /* Nothing to do! */
2666 }
2667 /* Run one more char cycle */
2668 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2669 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2670 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2671 #endif
2672 }
2673
2674 /*
2675 * This routine is called when a particular tty device is closed.
2676 */
2677 static void cy_close(struct tty_struct *tty, struct file *filp)
2678 {
2679 struct cyclades_port *info = tty->driver_data;
2680 struct cyclades_card *card;
2681 unsigned long flags;
2682
2683 #ifdef CY_DEBUG_OTHER
2684 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2685 #endif
2686
2687 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2688 return;
2689 }
2690
2691 card = info->card;
2692
2693 spin_lock_irqsave(&card->card_lock, flags);
2694 /* If the TTY is being hung up, nothing to do */
2695 if (tty_hung_up_p(filp)) {
2696 spin_unlock_irqrestore(&card->card_lock, flags);
2697 return;
2698 }
2699 #ifdef CY_DEBUG_OPEN
2700 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2701 info->count);
2702 #endif
2703 if ((tty->count == 1) && (info->count != 1)) {
2704 /*
2705 * Uh, oh. tty->count is 1, which means that the tty
2706 * structure will be freed. Info->count should always
2707 * be one in these conditions. If it's greater than
2708 * one, we've got real problems, since it means the
2709 * serial port won't be shutdown.
2710 */
2711 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2712 "tty->count is 1, info->count is %d\n", info->count);
2713 info->count = 1;
2714 }
2715 #ifdef CY_DEBUG_COUNT
2716 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
2717 current->pid, info->count - 1);
2718 #endif
2719 if (--info->count < 0) {
2720 #ifdef CY_DEBUG_COUNT
2721 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2722 #endif
2723 info->count = 0;
2724 }
2725 if (info->count) {
2726 spin_unlock_irqrestore(&card->card_lock, flags);
2727 return;
2728 }
2729 info->flags |= ASYNC_CLOSING;
2730
2731 /*
2732 * Now we wait for the transmit buffer to clear; and we notify
2733 * the line discipline to only process XON/XOFF characters.
2734 */
2735 tty->closing = 1;
2736 spin_unlock_irqrestore(&card->card_lock, flags);
2737 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2738 tty_wait_until_sent(tty, info->closing_wait);
2739 }
2740 spin_lock_irqsave(&card->card_lock, flags);
2741
2742 if (!IS_CYC_Z(*card)) {
2743 int channel = info->line - card->first_line;
2744 int index = card->bus_index;
2745 void __iomem *base_addr = card->base_addr +
2746 (cy_chip_offset[channel >> 2] << index);
2747 /* Stop accepting input */
2748 channel &= 0x03;
2749 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2750 cy_writeb(base_addr + (CySRER << index),
2751 readb(base_addr + (CySRER << index)) & ~CyRxData);
2752 if (info->flags & ASYNC_INITIALIZED) {
2753 /* Waiting for on-board buffers to be empty before closing
2754 the port */
2755 spin_unlock_irqrestore(&card->card_lock, flags);
2756 cy_wait_until_sent(tty, info->timeout);
2757 spin_lock_irqsave(&card->card_lock, flags);
2758 }
2759 } else {
2760 #ifdef Z_WAKE
2761 /* Waiting for on-board buffers to be empty before closing the port */
2762 void __iomem *base_addr = card->base_addr;
2763 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2764 struct ZFW_CTRL __iomem *zfw_ctrl =
2765 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2766 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2767 int channel = info->line - card->first_line;
2768 int retval;
2769
2770 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2771 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2772 if (retval != 0) {
2773 printk(KERN_DEBUG "cyc:cy_close retval on "
2774 "ttyC%d was %x\n", info->line, retval);
2775 }
2776 spin_unlock_irqrestore(&card->card_lock, flags);
2777 wait_for_completion_interruptible(&info->shutdown_wait);
2778 spin_lock_irqsave(&card->card_lock, flags);
2779 }
2780 #endif
2781 }
2782
2783 spin_unlock_irqrestore(&card->card_lock, flags);
2784 shutdown(info);
2785 if (tty->driver->flush_buffer)
2786 tty->driver->flush_buffer(tty);
2787 tty_ldisc_flush(tty);
2788 spin_lock_irqsave(&card->card_lock, flags);
2789
2790 tty->closing = 0;
2791 info->event = 0;
2792 info->tty = NULL;
2793 if (info->blocked_open) {
2794 spin_unlock_irqrestore(&card->card_lock, flags);
2795 if (info->close_delay) {
2796 msleep_interruptible(jiffies_to_msecs
2797 (info->close_delay));
2798 }
2799 wake_up_interruptible(&info->open_wait);
2800 spin_lock_irqsave(&card->card_lock, flags);
2801 }
2802 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2803 wake_up_interruptible(&info->close_wait);
2804
2805 #ifdef CY_DEBUG_OTHER
2806 printk(KERN_DEBUG "cyc:cy_close done\n");
2807 #endif
2808
2809 spin_unlock_irqrestore(&card->card_lock, flags);
2810 } /* cy_close */
2811
2812 /* This routine gets called when tty_write has put something into
2813 * the write_queue. The characters may come from user space or
2814 * kernel space.
2815 *
2816 * This routine will return the number of characters actually
2817 * accepted for writing.
2818 *
2819 * If the port is not already transmitting stuff, start it off by
2820 * enabling interrupts. The interrupt service routine will then
2821 * ensure that the characters are sent.
2822 * If the port is already active, there is no need to kick it.
2823 *
2824 */
2825 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2826 {
2827 struct cyclades_port *info = tty->driver_data;
2828 unsigned long flags;
2829 int c, ret = 0;
2830
2831 #ifdef CY_DEBUG_IO
2832 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2833 #endif
2834
2835 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2836 return 0;
2837 }
2838
2839 if (!info->xmit_buf)
2840 return 0;
2841
2842 spin_lock_irqsave(&info->card->card_lock, flags);
2843 while (1) {
2844 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2845 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2846
2847 if (c <= 0)
2848 break;
2849
2850 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2851 info->xmit_head = (info->xmit_head + c) &
2852 (SERIAL_XMIT_SIZE - 1);
2853 info->xmit_cnt += c;
2854 buf += c;
2855 count -= c;
2856 ret += c;
2857 }
2858 spin_unlock_irqrestore(&info->card->card_lock, flags);
2859
2860 info->idle_stats.xmit_bytes += ret;
2861 info->idle_stats.xmit_idle = jiffies;
2862
2863 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2864 start_xmit(info);
2865 }
2866 return ret;
2867 } /* cy_write */
2868
2869 /*
2870 * This routine is called by the kernel to write a single
2871 * character to the tty device. If the kernel uses this routine,
2872 * it must call the flush_chars() routine (if defined) when it is
2873 * done stuffing characters into the driver. If there is no room
2874 * in the queue, the character is ignored.
2875 */
2876 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2877 {
2878 struct cyclades_port *info = tty->driver_data;
2879 unsigned long flags;
2880
2881 #ifdef CY_DEBUG_IO
2882 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2883 #endif
2884
2885 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2886 return;
2887
2888 if (!info->xmit_buf)
2889 return;
2890
2891 spin_lock_irqsave(&info->card->card_lock, flags);
2892 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2893 spin_unlock_irqrestore(&info->card->card_lock, flags);
2894 return;
2895 }
2896
2897 info->xmit_buf[info->xmit_head++] = ch;
2898 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2899 info->xmit_cnt++;
2900 info->idle_stats.xmit_bytes++;
2901 info->idle_stats.xmit_idle = jiffies;
2902 spin_unlock_irqrestore(&info->card->card_lock, flags);
2903 } /* cy_put_char */
2904
2905 /*
2906 * This routine is called by the kernel after it has written a
2907 * series of characters to the tty device using put_char().
2908 */
2909 static void cy_flush_chars(struct tty_struct *tty)
2910 {
2911 struct cyclades_port *info = tty->driver_data;
2912
2913 #ifdef CY_DEBUG_IO
2914 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2915 #endif
2916
2917 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2918 return;
2919
2920 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2921 !info->xmit_buf)
2922 return;
2923
2924 start_xmit(info);
2925 } /* cy_flush_chars */
2926
2927 /*
2928 * This routine returns the numbers of characters the tty driver
2929 * will accept for queuing to be written. This number is subject
2930 * to change as output buffers get emptied, or if the output flow
2931 * control is activated.
2932 */
2933 static int cy_write_room(struct tty_struct *tty)
2934 {
2935 struct cyclades_port *info = tty->driver_data;
2936 int ret;
2937
2938 #ifdef CY_DEBUG_IO
2939 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2940 #endif
2941
2942 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2943 return 0;
2944 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2945 if (ret < 0)
2946 ret = 0;
2947 return ret;
2948 } /* cy_write_room */
2949
2950 static int cy_chars_in_buffer(struct tty_struct *tty)
2951 {
2952 struct cyclades_card *card;
2953 struct cyclades_port *info = tty->driver_data;
2954 int channel;
2955
2956 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2957 return 0;
2958
2959 card = info->card;
2960 channel = (info->line) - (card->first_line);
2961
2962 #ifdef Z_EXT_CHARS_IN_BUFFER
2963 if (!IS_CYC_Z(cy_card[card])) {
2964 #endif /* Z_EXT_CHARS_IN_BUFFER */
2965 #ifdef CY_DEBUG_IO
2966 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2967 info->line, info->xmit_cnt);
2968 #endif
2969 return info->xmit_cnt;
2970 #ifdef Z_EXT_CHARS_IN_BUFFER
2971 } else {
2972 static struct FIRM_ID *firm_id;
2973 static struct ZFW_CTRL *zfw_ctrl;
2974 static struct CH_CTRL *ch_ctrl;
2975 static struct BUF_CTRL *buf_ctrl;
2976 int char_count;
2977 __u32 tx_put, tx_get, tx_bufsize;
2978
2979 firm_id = card->base_addr + ID_ADDRESS;
2980 zfw_ctrl = card->base_addr +
2981 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2982 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2983 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2984
2985 tx_get = readl(&buf_ctrl->tx_get);
2986 tx_put = readl(&buf_ctrl->tx_put);
2987 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2988 if (tx_put >= tx_get)
2989 char_count = tx_put - tx_get;
2990 else
2991 char_count = tx_put - tx_get + tx_bufsize;
2992 #ifdef CY_DEBUG_IO
2993 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2994 info->line, info->xmit_cnt + char_count);
2995 #endif
2996 return info->xmit_cnt + char_count;
2997 }
2998 #endif /* Z_EXT_CHARS_IN_BUFFER */
2999 } /* cy_chars_in_buffer */
3000
3001 /*
3002 * ------------------------------------------------------------
3003 * cy_ioctl() and friends
3004 * ------------------------------------------------------------
3005 */
3006
3007 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
3008 {
3009 int co, co_val, bpr;
3010 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3011 25000000);
3012
3013 if (baud == 0) {
3014 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3015 return;
3016 }
3017
3018 /* determine which prescaler to use */
3019 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3020 if (cy_clock / co_val / baud > 63)
3021 break;
3022 }
3023
3024 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3025 if (bpr > 255)
3026 bpr = 255;
3027
3028 info->tbpr = info->rbpr = bpr;
3029 info->tco = info->rco = co;
3030 }
3031
3032 /*
3033 * This routine finds or computes the various line characteristics.
3034 * It used to be called config_setup
3035 */
3036 static void set_line_char(struct cyclades_port *info)
3037 {
3038 struct cyclades_card *card;
3039 unsigned long flags;
3040 void __iomem *base_addr;
3041 int chip, channel, index;
3042 unsigned cflag, iflag;
3043 unsigned short chip_number;
3044 int baud, baud_rate = 0;
3045 int i;
3046
3047 if (!info->tty || !info->tty->termios) {
3048 return;
3049 }
3050 if (info->line == -1) {
3051 return;
3052 }
3053 cflag = info->tty->termios->c_cflag;
3054 iflag = info->tty->termios->c_iflag;
3055
3056 /*
3057 * Set up the tty->alt_speed kludge
3058 */
3059 if (info->tty) {
3060 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3061 info->tty->alt_speed = 57600;
3062 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3063 info->tty->alt_speed = 115200;
3064 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3065 info->tty->alt_speed = 230400;
3066 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3067 info->tty->alt_speed = 460800;
3068 }
3069
3070 card = info->card;
3071 channel = info->line - card->first_line;
3072 chip_number = channel / 4;
3073
3074 if (!IS_CYC_Z(*card)) {
3075
3076 index = card->bus_index;
3077
3078 /* baud rate */
3079 baud = tty_get_baud_rate(info->tty);
3080 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3081 ASYNC_SPD_CUST) {
3082 if (info->custom_divisor)
3083 baud_rate = info->baud / info->custom_divisor;
3084 else
3085 baud_rate = info->baud;
3086 } else if (baud > CD1400_MAX_SPEED) {
3087 baud = CD1400_MAX_SPEED;
3088 }
3089 /* find the baud index */
3090 for (i = 0; i < 20; i++) {
3091 if (baud == baud_table[i]) {
3092 break;
3093 }
3094 }
3095 if (i == 20) {
3096 i = 19; /* CD1400_MAX_SPEED */
3097 }
3098
3099 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3100 ASYNC_SPD_CUST) {
3101 cyy_baud_calc(info, baud_rate);
3102 } else {
3103 if (info->chip_rev >= CD1400_REV_J) {
3104 /* It is a CD1400 rev. J or later */
3105 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3106 info->tco = baud_co_60[i]; /* Tx CO */
3107 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3108 info->rco = baud_co_60[i]; /* Rx CO */
3109 } else {
3110 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3111 info->tco = baud_co_25[i]; /* Tx CO */
3112 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3113 info->rco = baud_co_25[i]; /* Rx CO */
3114 }
3115 }
3116 if (baud_table[i] == 134) {
3117 /* get it right for 134.5 baud */
3118 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3119 2;
3120 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3121 ASYNC_SPD_CUST) {
3122 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3123 baud_rate) + 2;
3124 } else if (baud_table[i]) {
3125 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3126 baud_table[i]) + 2;
3127 /* this needs to be propagated into the card info */
3128 } else {
3129 info->timeout = 0;
3130 }
3131 /* By tradition (is it a standard?) a baud rate of zero
3132 implies the line should be/has been closed. A bit
3133 later in this routine such a test is performed. */
3134
3135 /* byte size and parity */
3136 info->cor5 = 0;
3137 info->cor4 = 0;
3138 /* receive threshold */
3139 info->cor3 = (info->default_threshold ?
3140 info->default_threshold : baud_cor3[i]);
3141 info->cor2 = CyETC;
3142 switch (cflag & CSIZE) {
3143 case CS5:
3144 info->cor1 = Cy_5_BITS;
3145 break;
3146 case CS6:
3147 info->cor1 = Cy_6_BITS;
3148 break;
3149 case CS7:
3150 info->cor1 = Cy_7_BITS;
3151 break;
3152 case CS8:
3153 info->cor1 = Cy_8_BITS;
3154 break;
3155 }
3156 if (cflag & CSTOPB) {
3157 info->cor1 |= Cy_2_STOP;
3158 }
3159 if (cflag & PARENB) {
3160 if (cflag & PARODD) {
3161 info->cor1 |= CyPARITY_O;
3162 } else {
3163 info->cor1 |= CyPARITY_E;
3164 }
3165 } else {
3166 info->cor1 |= CyPARITY_NONE;
3167 }
3168
3169 /* CTS flow control flag */
3170 if (cflag & CRTSCTS) {
3171 info->flags |= ASYNC_CTS_FLOW;
3172 info->cor2 |= CyCtsAE;
3173 } else {
3174 info->flags &= ~ASYNC_CTS_FLOW;
3175 info->cor2 &= ~CyCtsAE;
3176 }
3177 if (cflag & CLOCAL)
3178 info->flags &= ~ASYNC_CHECK_CD;
3179 else
3180 info->flags |= ASYNC_CHECK_CD;
3181
3182 /***********************************************
3183 The hardware option, CyRtsAO, presents RTS when
3184 the chip has characters to send. Since most modems
3185 use RTS as reverse (inbound) flow control, this
3186 option is not used. If inbound flow control is
3187 necessary, DTR can be programmed to provide the
3188 appropriate signals for use with a non-standard
3189 cable. Contact Marcio Saito for details.
3190 ***********************************************/
3191
3192 chip = channel >> 2;
3193 channel &= 0x03;
3194 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3195
3196 spin_lock_irqsave(&card->card_lock, flags);
3197 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3198
3199 /* tx and rx baud rate */
3200
3201 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3202 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3203 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3204 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3205
3206 /* set line characteristics according configuration */
3207
3208 cy_writeb(base_addr + (CySCHR1 << index),
3209 START_CHAR(info->tty));
3210 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3211 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3212 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3213 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3214 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3215 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3216
3217 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3218 CyCOR3ch, index);
3219
3220 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3221 cy_writeb(base_addr + (CyRTPR << index),
3222 (info->default_timeout ? info->default_timeout : 0x02));
3223 /* 10ms rx timeout */
3224
3225 if (C_CLOCAL(info->tty)) {
3226 /* without modem intr */
3227 cy_writeb(base_addr + (CySRER << index),
3228 readb(base_addr + (CySRER << index)) | CyMdmCh);
3229 /* act on 1->0 modem transitions */
3230 if ((cflag & CRTSCTS) && info->rflow) {
3231 cy_writeb(base_addr + (CyMCOR1 << index),
3232 (CyCTS | rflow_thr[i]));
3233 } else {
3234 cy_writeb(base_addr + (CyMCOR1 << index),
3235 CyCTS);
3236 }
3237 /* act on 0->1 modem transitions */
3238 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3239 } else {
3240 /* without modem intr */
3241 cy_writeb(base_addr + (CySRER << index),
3242 readb(base_addr +
3243 (CySRER << index)) | CyMdmCh);
3244 /* act on 1->0 modem transitions */
3245 if ((cflag & CRTSCTS) && info->rflow) {
3246 cy_writeb(base_addr + (CyMCOR1 << index),
3247 (CyDSR | CyCTS | CyRI | CyDCD |
3248 rflow_thr[i]));
3249 } else {
3250 cy_writeb(base_addr + (CyMCOR1 << index),
3251 CyDSR | CyCTS | CyRI | CyDCD);
3252 }
3253 /* act on 0->1 modem transitions */
3254 cy_writeb(base_addr + (CyMCOR2 << index),
3255 CyDSR | CyCTS | CyRI | CyDCD);
3256 }
3257
3258 if (i == 0) { /* baud rate is zero, turn off line */
3259 if (info->rtsdtr_inv) {
3260 cy_writeb(base_addr + (CyMSVR1 << index),
3261 ~CyRTS);
3262 } else {
3263 cy_writeb(base_addr + (CyMSVR2 << index),
3264 ~CyDTR);
3265 }
3266 #ifdef CY_DEBUG_DTR
3267 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3268 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3269 readb(base_addr + (CyMSVR1 << index)),
3270 readb(base_addr + (CyMSVR2 << index)));
3271 #endif
3272 } else {
3273 if (info->rtsdtr_inv) {
3274 cy_writeb(base_addr + (CyMSVR1 << index),
3275 CyRTS);
3276 } else {
3277 cy_writeb(base_addr + (CyMSVR2 << index),
3278 CyDTR);
3279 }
3280 #ifdef CY_DEBUG_DTR
3281 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3282 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3283 readb(base_addr + (CyMSVR1 << index)),
3284 readb(base_addr + (CyMSVR2 << index)));
3285 #endif
3286 }
3287
3288 if (info->tty) {
3289 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3290 }
3291 spin_unlock_irqrestore(&card->card_lock, flags);
3292
3293 } else {
3294 struct FIRM_ID __iomem *firm_id;
3295 struct ZFW_CTRL __iomem *zfw_ctrl;
3296 struct BOARD_CTRL __iomem *board_ctrl;
3297 struct CH_CTRL __iomem *ch_ctrl;
3298 struct BUF_CTRL __iomem *buf_ctrl;
3299 __u32 sw_flow;
3300 int retval;
3301
3302 firm_id = card->base_addr + ID_ADDRESS;
3303 if (!ISZLOADED(*card)) {
3304 return;
3305 }
3306
3307 zfw_ctrl = card->base_addr +
3308 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3309 board_ctrl = &zfw_ctrl->board_ctrl;
3310 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3311 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3312
3313 /* baud rate */
3314 baud = tty_get_baud_rate(info->tty);
3315 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3316 ASYNC_SPD_CUST) {
3317 if (info->custom_divisor)
3318 baud_rate = info->baud / info->custom_divisor;
3319 else
3320 baud_rate = info->baud;
3321 } else if (baud > CYZ_MAX_SPEED) {
3322 baud = CYZ_MAX_SPEED;
3323 }
3324 cy_writel(&ch_ctrl->comm_baud, baud);
3325
3326 if (baud == 134) {
3327 /* get it right for 134.5 baud */
3328 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3329 2;
3330 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3331 ASYNC_SPD_CUST) {
3332 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3333 baud_rate) + 2;
3334 } else if (baud) {
3335 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3336 baud) + 2;
3337 /* this needs to be propagated into the card info */
3338 } else {
3339 info->timeout = 0;
3340 }
3341
3342 /* byte size and parity */
3343 switch (cflag & CSIZE) {
3344 case CS5:
3345 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3346 break;
3347 case CS6:
3348 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3349 break;
3350 case CS7:
3351 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3352 break;
3353 case CS8:
3354 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3355 break;
3356 }
3357 if (cflag & CSTOPB) {
3358 cy_writel(&ch_ctrl->comm_data_l,
3359 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3360 } else {
3361 cy_writel(&ch_ctrl->comm_data_l,
3362 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3363 }
3364 if (cflag & PARENB) {
3365 if (cflag & PARODD) {
3366 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3367 } else {
3368 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3369 }
3370 } else {
3371 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3372 }
3373
3374 /* CTS flow control flag */
3375 if (cflag & CRTSCTS) {
3376 cy_writel(&ch_ctrl->hw_flow,
3377 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3378 } else {
3379 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3380 ~(C_RS_CTS | C_RS_RTS));
3381 }
3382 /* As the HW flow control is done in firmware, the driver
3383 doesn't need to care about it */
3384 info->flags &= ~ASYNC_CTS_FLOW;
3385
3386 /* XON/XOFF/XANY flow control flags */
3387 sw_flow = 0;
3388 if (iflag & IXON) {
3389 sw_flow |= C_FL_OXX;
3390 if (iflag & IXANY)
3391 sw_flow |= C_FL_OIXANY;
3392 }
3393 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3394
3395 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3396 if (retval != 0) {
3397 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3398 "was %x\n", info->line, retval);
3399 }
3400
3401 /* CD sensitivity */
3402 if (cflag & CLOCAL) {
3403 info->flags &= ~ASYNC_CHECK_CD;
3404 } else {
3405 info->flags |= ASYNC_CHECK_CD;
3406 }
3407
3408 if (baud == 0) { /* baud rate is zero, turn off line */
3409 cy_writel(&ch_ctrl->rs_control,
3410 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3411 #ifdef CY_DEBUG_DTR
3412 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3413 #endif
3414 } else {
3415 cy_writel(&ch_ctrl->rs_control,
3416 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3417 #ifdef CY_DEBUG_DTR
3418 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3419 #endif
3420 }
3421
3422 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3423 if (retval != 0) {
3424 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3425 "was %x\n", info->line, retval);
3426 }
3427
3428 if (info->tty) {
3429 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3430 }
3431 }
3432 } /* set_line_char */
3433
3434 static int
3435 get_serial_info(struct cyclades_port *info,
3436 struct serial_struct __user * retinfo)
3437 {
3438 struct serial_struct tmp;
3439 struct cyclades_card *cinfo = info->card;
3440
3441 if (!retinfo)
3442 return -EFAULT;
3443 memset(&tmp, 0, sizeof(tmp));
3444 tmp.type = info->type;
3445 tmp.line = info->line;
3446 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3447 cinfo->first_line;
3448 tmp.irq = cinfo->irq;
3449 tmp.flags = info->flags;
3450 tmp.close_delay = info->close_delay;
3451 tmp.closing_wait = info->closing_wait;
3452 tmp.baud_base = info->baud;
3453 tmp.custom_divisor = info->custom_divisor;
3454 tmp.hub6 = 0; /*!!! */
3455 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3456 } /* get_serial_info */
3457
3458 static int
3459 set_serial_info(struct cyclades_port *info,
3460 struct serial_struct __user * new_info)
3461 {
3462 struct serial_struct new_serial;
3463 struct cyclades_port old_info;
3464
3465 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3466 return -EFAULT;
3467 old_info = *info;
3468
3469 if (!capable(CAP_SYS_ADMIN)) {
3470 if (new_serial.close_delay != info->close_delay ||
3471 new_serial.baud_base != info->baud ||
3472 (new_serial.flags & ASYNC_FLAGS &
3473 ~ASYNC_USR_MASK) !=
3474 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3475 return -EPERM;
3476 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3477 (new_serial.flags & ASYNC_USR_MASK);
3478 info->baud = new_serial.baud_base;
3479 info->custom_divisor = new_serial.custom_divisor;
3480 goto check_and_exit;
3481 }
3482
3483 /*
3484 * OK, past this point, all the error checking has been done.
3485 * At this point, we start making changes.....
3486 */
3487
3488 info->baud = new_serial.baud_base;
3489 info->custom_divisor = new_serial.custom_divisor;
3490 info->flags = (info->flags & ~ASYNC_FLAGS) |
3491 (new_serial.flags & ASYNC_FLAGS);
3492 info->close_delay = new_serial.close_delay * HZ / 100;
3493 info->closing_wait = new_serial.closing_wait * HZ / 100;
3494
3495 check_and_exit:
3496 if (info->flags & ASYNC_INITIALIZED) {
3497 set_line_char(info);
3498 return 0;
3499 } else {
3500 return startup(info);
3501 }
3502 } /* set_serial_info */
3503
3504 /*
3505 * get_lsr_info - get line status register info
3506 *
3507 * Purpose: Let user call ioctl() to get info when the UART physically
3508 * is emptied. On bus types like RS485, the transmitter must
3509 * release the bus after transmitting. This must be done when
3510 * the transmit shift register is empty, not be done when the
3511 * transmit holding register is empty. This functionality
3512 * allows an RS485 driver to be written in user space.
3513 */
3514 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3515 {
3516 struct cyclades_card *card;
3517 int chip, channel, index;
3518 unsigned char status;
3519 unsigned int result;
3520 unsigned long flags;
3521 void __iomem *base_addr;
3522
3523 card = info->card;
3524 channel = (info->line) - (card->first_line);
3525 if (!IS_CYC_Z(*card)) {
3526 chip = channel >> 2;
3527 channel &= 0x03;
3528 index = card->bus_index;
3529 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3530
3531 spin_lock_irqsave(&card->card_lock, flags);
3532 status = readb(base_addr + (CySRER << index)) &
3533 (CyTxRdy | CyTxMpty);
3534 spin_unlock_irqrestore(&card->card_lock, flags);
3535 result = (status ? 0 : TIOCSER_TEMT);
3536 } else {
3537 /* Not supported yet */
3538 return -EINVAL;
3539 }
3540 return put_user(result, (unsigned long __user *)value);
3541 }
3542
3543 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3544 {
3545 struct cyclades_port *info = tty->driver_data;
3546 struct cyclades_card *card;
3547 int chip, channel, index;
3548 void __iomem *base_addr;
3549 unsigned long flags;
3550 unsigned char status;
3551 unsigned long lstatus;
3552 unsigned int result;
3553 struct FIRM_ID __iomem *firm_id;
3554 struct ZFW_CTRL __iomem *zfw_ctrl;
3555 struct BOARD_CTRL __iomem *board_ctrl;
3556 struct CH_CTRL __iomem *ch_ctrl;
3557
3558 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3559 return -ENODEV;
3560
3561 card = info->card;
3562 channel = info->line - card->first_line;
3563 if (!IS_CYC_Z(*card)) {
3564 chip = channel >> 2;
3565 channel &= 0x03;
3566 index = card->bus_index;
3567 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3568
3569 spin_lock_irqsave(&card->card_lock, flags);
3570 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3571 status = readb(base_addr + (CyMSVR1 << index));
3572 status |= readb(base_addr + (CyMSVR2 << index));
3573 spin_unlock_irqrestore(&card->card_lock, flags);
3574
3575 if (info->rtsdtr_inv) {
3576 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3577 ((status & CyDTR) ? TIOCM_RTS : 0);
3578 } else {
3579 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3580 ((status & CyDTR) ? TIOCM_DTR : 0);
3581 }
3582 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3583 ((status & CyRI) ? TIOCM_RNG : 0) |
3584 ((status & CyDSR) ? TIOCM_DSR : 0) |
3585 ((status & CyCTS) ? TIOCM_CTS : 0);
3586 } else {
3587 base_addr = card->base_addr;
3588 firm_id = card->base_addr + ID_ADDRESS;
3589 if (ISZLOADED(*card)) {
3590 zfw_ctrl = card->base_addr +
3591 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3592 board_ctrl = &zfw_ctrl->board_ctrl;
3593 ch_ctrl = zfw_ctrl->ch_ctrl;
3594 lstatus = readl(&ch_ctrl[channel].rs_status);
3595 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3596 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3597 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3598 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3599 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3600 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3601 } else {
3602 result = 0;
3603 return -ENODEV;
3604 }
3605
3606 }
3607 return result;
3608 } /* cy_tiomget */
3609
3610 static int
3611 cy_tiocmset(struct tty_struct *tty, struct file *file,
3612 unsigned int set, unsigned int clear)
3613 {
3614 struct cyclades_port *info = tty->driver_data;
3615 struct cyclades_card *card;
3616 int chip, channel, index;
3617 void __iomem *base_addr;
3618 unsigned long flags;
3619 struct FIRM_ID __iomem *firm_id;
3620 struct ZFW_CTRL __iomem *zfw_ctrl;
3621 struct BOARD_CTRL __iomem *board_ctrl;
3622 struct CH_CTRL __iomem *ch_ctrl;
3623 int retval;
3624
3625 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3626 return -ENODEV;
3627
3628 card = info->card;
3629 channel = (info->line) - (card->first_line);
3630 if (!IS_CYC_Z(*card)) {
3631 chip = channel >> 2;
3632 channel &= 0x03;
3633 index = card->bus_index;
3634 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3635
3636 if (set & TIOCM_RTS) {
3637 spin_lock_irqsave(&card->card_lock, flags);
3638 cy_writeb(base_addr + (CyCAR << index),
3639 (u_char) channel);
3640 if (info->rtsdtr_inv) {
3641 cy_writeb(base_addr + (CyMSVR2 << index),
3642 CyDTR);
3643 } else {
3644 cy_writeb(base_addr + (CyMSVR1 << index),
3645 CyRTS);
3646 }
3647 spin_unlock_irqrestore(&card->card_lock, flags);
3648 }
3649 if (clear & TIOCM_RTS) {
3650 spin_lock_irqsave(&card->card_lock, flags);
3651 cy_writeb(base_addr + (CyCAR << index),
3652 (u_char) channel);
3653 if (info->rtsdtr_inv) {
3654 cy_writeb(base_addr + (CyMSVR2 << index),
3655 ~CyDTR);
3656 } else {
3657 cy_writeb(base_addr + (CyMSVR1 << index),
3658 ~CyRTS);
3659 }
3660 spin_unlock_irqrestore(&card->card_lock, flags);
3661 }
3662 if (set & TIOCM_DTR) {
3663 spin_lock_irqsave(&card->card_lock, flags);
3664 cy_writeb(base_addr + (CyCAR << index),
3665 (u_char) channel);
3666 if (info->rtsdtr_inv) {
3667 cy_writeb(base_addr + (CyMSVR1 << index),
3668 CyRTS);
3669 } else {
3670 cy_writeb(base_addr + (CyMSVR2 << index),
3671 CyDTR);
3672 }
3673 #ifdef CY_DEBUG_DTR
3674 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3675 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3676 readb(base_addr + (CyMSVR1 << index)),
3677 readb(base_addr + (CyMSVR2 << index)));
3678 #endif
3679 spin_unlock_irqrestore(&card->card_lock, flags);
3680 }
3681 if (clear & TIOCM_DTR) {
3682 spin_lock_irqsave(&card->card_lock, flags);
3683 cy_writeb(base_addr + (CyCAR << index),
3684 (u_char) channel);
3685 if (info->rtsdtr_inv) {
3686 cy_writeb(base_addr + (CyMSVR1 << index),
3687 ~CyRTS);
3688 } else {
3689 cy_writeb(base_addr + (CyMSVR2 << index),
3690 ~CyDTR);
3691 }
3692
3693 #ifdef CY_DEBUG_DTR
3694 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3695 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3696 readb(base_addr + (CyMSVR1 << index)),
3697 readb(base_addr + (CyMSVR2 << index)));
3698 #endif
3699 spin_unlock_irqrestore(&card->card_lock, flags);
3700 }
3701 } else {
3702 base_addr = card->base_addr;
3703
3704 firm_id = card->base_addr + ID_ADDRESS;
3705 if (ISZLOADED(*card)) {
3706 zfw_ctrl = card->base_addr +
3707 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3708 board_ctrl = &zfw_ctrl->board_ctrl;
3709 ch_ctrl = zfw_ctrl->ch_ctrl;
3710
3711 if (set & TIOCM_RTS) {
3712 spin_lock_irqsave(&card->card_lock, flags);
3713 cy_writel(&ch_ctrl[channel].rs_control,
3714 readl(&ch_ctrl[channel].rs_control) |
3715 C_RS_RTS);
3716 spin_unlock_irqrestore(&card->card_lock, flags);
3717 }
3718 if (clear & TIOCM_RTS) {
3719 spin_lock_irqsave(&card->card_lock, flags);
3720 cy_writel(&ch_ctrl[channel].rs_control,
3721 readl(&ch_ctrl[channel].rs_control) &
3722 ~C_RS_RTS);
3723 spin_unlock_irqrestore(&card->card_lock, flags);
3724 }
3725 if (set & TIOCM_DTR) {
3726 spin_lock_irqsave(&card->card_lock, flags);
3727 cy_writel(&ch_ctrl[channel].rs_control,
3728 readl(&ch_ctrl[channel].rs_control) |
3729 C_RS_DTR);
3730 #ifdef CY_DEBUG_DTR
3731 printk(KERN_DEBUG "cyc:set_modem_info raising "
3732 "Z DTR\n");
3733 #endif
3734 spin_unlock_irqrestore(&card->card_lock, flags);
3735 }
3736 if (clear & TIOCM_DTR) {
3737 spin_lock_irqsave(&card->card_lock, flags);
3738 cy_writel(&ch_ctrl[channel].rs_control,
3739 readl(&ch_ctrl[channel].rs_control) &
3740 ~C_RS_DTR);
3741 #ifdef CY_DEBUG_DTR
3742 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3743 "Z DTR\n");
3744 #endif
3745 spin_unlock_irqrestore(&card->card_lock, flags);
3746 }
3747 } else {
3748 return -ENODEV;
3749 }
3750 spin_lock_irqsave(&card->card_lock, flags);
3751 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3752 if (retval != 0) {
3753 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3754 "was %x\n", info->line, retval);
3755 }
3756 spin_unlock_irqrestore(&card->card_lock, flags);
3757 }
3758 return 0;
3759 } /* cy_tiocmset */
3760
3761 /*
3762 * cy_break() --- routine which turns the break handling on or off
3763 */
3764 static void cy_break(struct tty_struct *tty, int break_state)
3765 {
3766 struct cyclades_port *info = tty->driver_data;
3767 struct cyclades_card *card;
3768 unsigned long flags;
3769
3770 if (serial_paranoia_check(info, tty->name, "cy_break"))
3771 return;
3772
3773 card = info->card;
3774
3775 spin_lock_irqsave(&card->card_lock, flags);
3776 if (!IS_CYC_Z(*card)) {
3777 /* Let the transmit ISR take care of this (since it
3778 requires stuffing characters into the output stream).
3779 */
3780 if (break_state == -1) {
3781 if (!info->breakon) {
3782 info->breakon = 1;
3783 if (!info->xmit_cnt) {
3784 spin_unlock_irqrestore(&card->card_lock, flags);
3785 start_xmit(info);
3786 spin_lock_irqsave(&card->card_lock, flags);
3787 }
3788 }
3789 } else {
3790 if (!info->breakoff) {
3791 info->breakoff = 1;
3792 if (!info->xmit_cnt) {
3793 spin_unlock_irqrestore(&card->card_lock, flags);
3794 start_xmit(info);
3795 spin_lock_irqsave(&card->card_lock, flags);
3796 }
3797 }
3798 }
3799 } else {
3800 int retval;
3801
3802 if (break_state == -1) {
3803 retval = cyz_issue_cmd(card,
3804 info->line - card->first_line,
3805 C_CM_SET_BREAK, 0L);
3806 if (retval != 0) {
3807 printk(KERN_ERR "cyc:cy_break (set) retval on "
3808 "ttyC%d was %x\n", info->line, retval);
3809 }
3810 } else {
3811 retval = cyz_issue_cmd(card,
3812 info->line - card->first_line,
3813 C_CM_CLR_BREAK, 0L);
3814 if (retval != 0) {
3815 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3816 "on ttyC%d was %x\n", info->line,
3817 retval);
3818 }
3819 }
3820 }
3821 spin_unlock_irqrestore(&card->card_lock, flags);
3822 } /* cy_break */
3823
3824 static int
3825 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3826 {
3827
3828 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3829 return -EFAULT;
3830 info->mon.int_count = 0;
3831 info->mon.char_count = 0;
3832 info->mon.char_max = 0;
3833 info->mon.char_last = 0;
3834 return 0;
3835 } /* get_mon_info */
3836
3837 static int set_threshold(struct cyclades_port *info, unsigned long value)
3838 {
3839 struct cyclades_card *card;
3840 void __iomem *base_addr;
3841 int channel, chip, index;
3842 unsigned long flags;
3843
3844 card = info->card;
3845 channel = info->line - card->first_line;
3846 if (!IS_CYC_Z(*card)) {
3847 chip = channel >> 2;
3848 channel &= 0x03;
3849 index = card->bus_index;
3850 base_addr =
3851 card->base_addr + (cy_chip_offset[chip] << index);
3852
3853 info->cor3 &= ~CyREC_FIFO;
3854 info->cor3 |= value & CyREC_FIFO;
3855
3856 spin_lock_irqsave(&card->card_lock, flags);
3857 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3858 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3859 spin_unlock_irqrestore(&card->card_lock, flags);
3860 } else {
3861 /* Nothing to do! */
3862 }
3863 return 0;
3864 } /* set_threshold */
3865
3866 static int
3867 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3868 {
3869 struct cyclades_card *card;
3870 void __iomem *base_addr;
3871 int channel, chip, index;
3872 unsigned long tmp;
3873
3874 card = info->card;
3875 channel = info->line - card->first_line;
3876 if (!IS_CYC_Z(*card)) {
3877 chip = channel >> 2;
3878 channel &= 0x03;
3879 index = card->bus_index;
3880 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3881
3882 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3883 return put_user(tmp, value);
3884 } else {
3885 /* Nothing to do! */
3886 return 0;
3887 }
3888 } /* get_threshold */
3889
3890 static int
3891 set_default_threshold(struct cyclades_port *info, unsigned long value)
3892 {
3893 info->default_threshold = value & 0x0f;
3894 return 0;
3895 } /* set_default_threshold */
3896
3897 static int
3898 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3899 {
3900 return put_user(info->default_threshold, value);
3901 } /* get_default_threshold */
3902
3903 static int set_timeout(struct cyclades_port *info, unsigned long value)
3904 {
3905 struct cyclades_card *card;
3906 void __iomem *base_addr;
3907 int channel, chip, index;
3908 unsigned long flags;
3909
3910 card = info->card;
3911 channel = info->line - card->first_line;
3912 if (!IS_CYC_Z(*card)) {
3913 chip = channel >> 2;
3914 channel &= 0x03;
3915 index = card->bus_index;
3916 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3917
3918 spin_lock_irqsave(&card->card_lock, flags);
3919 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3920 spin_unlock_irqrestore(&card->card_lock, flags);
3921 } else {
3922 /* Nothing to do! */
3923 }
3924 return 0;
3925 } /* set_timeout */
3926
3927 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3928 {
3929 struct cyclades_card *card;
3930 void __iomem *base_addr;
3931 int channel, chip, index;
3932 unsigned long tmp;
3933
3934 card = info->card;
3935 channel = info->line - card->first_line;
3936 if (!IS_CYC_Z(*card)) {
3937 chip = channel >> 2;
3938 channel &= 0x03;
3939 index = card->bus_index;
3940 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3941
3942 tmp = readb(base_addr + (CyRTPR << index));
3943 return put_user(tmp, value);
3944 } else {
3945 /* Nothing to do! */
3946 return 0;
3947 }
3948 } /* get_timeout */
3949
3950 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3951 {
3952 info->default_timeout = value & 0xff;
3953 return 0;
3954 } /* set_default_timeout */
3955
3956 static int
3957 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3958 {
3959 return put_user(info->default_timeout, value);
3960 } /* get_default_timeout */
3961
3962 /*
3963 * This routine allows the tty driver to implement device-
3964 * specific ioctl's. If the ioctl number passed in cmd is
3965 * not recognized by the driver, it should return ENOIOCTLCMD.
3966 */
3967 static int
3968 cy_ioctl(struct tty_struct *tty, struct file *file,
3969 unsigned int cmd, unsigned long arg)
3970 {
3971 struct cyclades_port *info = tty->driver_data;
3972 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3973 struct serial_icounter_struct __user *p_cuser; /* user space */
3974 int ret_val = 0;
3975 unsigned long flags;
3976 void __user *argp = (void __user *)arg;
3977
3978 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3979 return -ENODEV;
3980
3981 #ifdef CY_DEBUG_OTHER
3982 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3983 info->line, cmd, arg);
3984 #endif
3985
3986 switch (cmd) {
3987 case CYGETMON:
3988 ret_val = get_mon_info(info, argp);
3989 break;
3990 case CYGETTHRESH:
3991 ret_val = get_threshold(info, argp);
3992 break;
3993 case CYSETTHRESH:
3994 ret_val = set_threshold(info, arg);
3995 break;
3996 case CYGETDEFTHRESH:
3997 ret_val = get_default_threshold(info, argp);
3998 break;
3999 case CYSETDEFTHRESH:
4000 ret_val = set_default_threshold(info, arg);
4001 break;
4002 case CYGETTIMEOUT:
4003 ret_val = get_timeout(info, argp);
4004 break;
4005 case CYSETTIMEOUT:
4006 ret_val = set_timeout(info, arg);
4007 break;
4008 case CYGETDEFTIMEOUT:
4009 ret_val = get_default_timeout(info, argp);
4010 break;
4011 case CYSETDEFTIMEOUT:
4012 ret_val = set_default_timeout(info, arg);
4013 break;
4014 case CYSETRFLOW:
4015 info->rflow = (int)arg;
4016 ret_val = 0;
4017 break;
4018 case CYGETRFLOW:
4019 ret_val = info->rflow;
4020 break;
4021 case CYSETRTSDTR_INV:
4022 info->rtsdtr_inv = (int)arg;
4023 ret_val = 0;
4024 break;
4025 case CYGETRTSDTR_INV:
4026 ret_val = info->rtsdtr_inv;
4027 break;
4028 case CYGETCD1400VER:
4029 ret_val = info->chip_rev;
4030 break;
4031 #ifndef CONFIG_CYZ_INTR
4032 case CYZSETPOLLCYCLE:
4033 cyz_polling_cycle = (arg * HZ) / 1000;
4034 ret_val = 0;
4035 break;
4036 case CYZGETPOLLCYCLE:
4037 ret_val = (cyz_polling_cycle * 1000) / HZ;
4038 break;
4039 #endif /* CONFIG_CYZ_INTR */
4040 case CYSETWAIT:
4041 info->closing_wait = (unsigned short)arg *HZ / 100;
4042 ret_val = 0;
4043 break;
4044 case CYGETWAIT:
4045 ret_val = info->closing_wait / (HZ / 100);
4046 break;
4047 case TIOCGSERIAL:
4048 ret_val = get_serial_info(info, argp);
4049 break;
4050 case TIOCSSERIAL:
4051 ret_val = set_serial_info(info, argp);
4052 break;
4053 case TIOCSERGETLSR: /* Get line status register */
4054 ret_val = get_lsr_info(info, argp);
4055 break;
4056 /*
4057 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4058 * - mask passed in arg for lines of interest
4059 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4060 * Caller should use TIOCGICOUNT to see which one it was
4061 */
4062 case TIOCMIWAIT:
4063 spin_lock_irqsave(&info->card->card_lock, flags);
4064 /* note the counters on entry */
4065 cnow = info->icount;
4066 spin_unlock_irqrestore(&info->card->card_lock, flags);
4067 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4068 cprev = cnow;
4069 spin_lock_irqsave(&info->card->card_lock, flags);
4070 cnow = info->icount; /* atomic copy */
4071 spin_unlock_irqrestore(&info->card->card_lock, flags);
4072
4073 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4074 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4075 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4076 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4077 }));
4078 break;
4079
4080 /*
4081 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4082 * Return: write counters to the user passed counter struct
4083 * NB: both 1->0 and 0->1 transitions are counted except for
4084 * RI where only 0->1 is counted.
4085 */
4086 case TIOCGICOUNT:
4087 spin_lock_irqsave(&info->card->card_lock, flags);
4088 cnow = info->icount;
4089 spin_unlock_irqrestore(&info->card->card_lock, flags);
4090 p_cuser = argp;
4091 ret_val = put_user(cnow.cts, &p_cuser->cts);
4092 if (ret_val)
4093 return ret_val;
4094 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4095 if (ret_val)
4096 return ret_val;
4097 ret_val = put_user(cnow.rng, &p_cuser->rng);
4098 if (ret_val)
4099 return ret_val;
4100 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4101 if (ret_val)
4102 return ret_val;
4103 ret_val = put_user(cnow.rx, &p_cuser->rx);
4104 if (ret_val)
4105 return ret_val;
4106 ret_val = put_user(cnow.tx, &p_cuser->tx);
4107 if (ret_val)
4108 return ret_val;
4109 ret_val = put_user(cnow.frame, &p_cuser->frame);
4110 if (ret_val)
4111 return ret_val;
4112 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4113 if (ret_val)
4114 return ret_val;
4115 ret_val = put_user(cnow.parity, &p_cuser->parity);
4116 if (ret_val)
4117 return ret_val;
4118 ret_val = put_user(cnow.brk, &p_cuser->brk);
4119 if (ret_val)
4120 return ret_val;
4121 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4122 if (ret_val)
4123 return ret_val;
4124 ret_val = 0;
4125 break;
4126 default:
4127 ret_val = -ENOIOCTLCMD;
4128 }
4129
4130 #ifdef CY_DEBUG_OTHER
4131 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4132 #endif
4133
4134 return ret_val;
4135 } /* cy_ioctl */
4136
4137 /*
4138 * This routine allows the tty driver to be notified when
4139 * device's termios settings have changed. Note that a
4140 * well-designed tty driver should be prepared to accept the case
4141 * where old == NULL, and try to do something rational.
4142 */
4143 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4144 {
4145 struct cyclades_port *info = tty->driver_data;
4146
4147 #ifdef CY_DEBUG_OTHER
4148 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4149 #endif
4150
4151 if (tty->termios->c_cflag == old_termios->c_cflag &&
4152 (tty->termios->c_iflag & (IXON | IXANY)) ==
4153 (old_termios->c_iflag & (IXON | IXANY)))
4154 return;
4155 set_line_char(info);
4156
4157 if ((old_termios->c_cflag & CRTSCTS) &&
4158 !(tty->termios->c_cflag & CRTSCTS)) {
4159 tty->hw_stopped = 0;
4160 cy_start(tty);
4161 }
4162 #if 0
4163 /*
4164 * No need to wake up processes in open wait, since they
4165 * sample the CLOCAL flag once, and don't recheck it.
4166 * XXX It's not clear whether the current behavior is correct
4167 * or not. Hence, this may change.....
4168 */
4169 if (!(old_termios->c_cflag & CLOCAL) &&
4170 (tty->termios->c_cflag & CLOCAL))
4171 wake_up_interruptible(&info->open_wait);
4172 #endif
4173 } /* cy_set_termios */
4174
4175 /* This function is used to send a high-priority XON/XOFF character to
4176 the device.
4177 */
4178 static void cy_send_xchar(struct tty_struct *tty, char ch)
4179 {
4180 struct cyclades_port *info = tty->driver_data;
4181 struct cyclades_card *card;
4182 int channel;
4183
4184 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4185 return;
4186
4187 info->x_char = ch;
4188
4189 if (ch)
4190 cy_start(tty);
4191
4192 card = info->card;
4193 channel = info->line - card->first_line;
4194
4195 if (IS_CYC_Z(*card)) {
4196 if (ch == STOP_CHAR(tty))
4197 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4198 else if (ch == START_CHAR(tty))
4199 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4200 }
4201 }
4202
4203 /* This routine is called by the upper-layer tty layer to signal
4204 that incoming characters should be throttled because the input
4205 buffers are close to full.
4206 */
4207 static void cy_throttle(struct tty_struct *tty)
4208 {
4209 struct cyclades_port *info = tty->driver_data;
4210 struct cyclades_card *card;
4211 unsigned long flags;
4212 void __iomem *base_addr;
4213 int chip, channel, index;
4214
4215 #ifdef CY_DEBUG_THROTTLE
4216 char buf[64];
4217
4218 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4219 tty->ldisc.chars_in_buffer(tty), info->line);
4220 #endif
4221
4222 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4223 return;
4224 }
4225
4226 card = info->card;
4227
4228 if (I_IXOFF(tty)) {
4229 if (!IS_CYC_Z(*card))
4230 cy_send_xchar(tty, STOP_CHAR(tty));
4231 else
4232 info->throttle = 1;
4233 }
4234
4235 if (tty->termios->c_cflag & CRTSCTS) {
4236 channel = info->line - card->first_line;
4237 if (!IS_CYC_Z(*card)) {
4238 chip = channel >> 2;
4239 channel &= 0x03;
4240 index = card->bus_index;
4241 base_addr = card->base_addr +
4242 (cy_chip_offset[chip] << index);
4243
4244 spin_lock_irqsave(&card->card_lock, flags);
4245 cy_writeb(base_addr + (CyCAR << index),
4246 (u_char) channel);
4247 if (info->rtsdtr_inv) {
4248 cy_writeb(base_addr + (CyMSVR2 << index),
4249 ~CyDTR);
4250 } else {
4251 cy_writeb(base_addr + (CyMSVR1 << index),
4252 ~CyRTS);
4253 }
4254 spin_unlock_irqrestore(&card->card_lock, flags);
4255 } else {
4256 info->throttle = 1;
4257 }
4258 }
4259 } /* cy_throttle */
4260
4261 /*
4262 * This routine notifies the tty driver that it should signal
4263 * that characters can now be sent to the tty without fear of
4264 * overrunning the input buffers of the line disciplines.
4265 */
4266 static void cy_unthrottle(struct tty_struct *tty)
4267 {
4268 struct cyclades_port *info = tty->driver_data;
4269 struct cyclades_card *card;
4270 unsigned long flags;
4271 void __iomem *base_addr;
4272 int chip, channel, index;
4273
4274 #ifdef CY_DEBUG_THROTTLE
4275 char buf[64];
4276
4277 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4278 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
4279 #endif
4280
4281 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4282 return;
4283 }
4284
4285 if (I_IXOFF(tty)) {
4286 if (info->x_char)
4287 info->x_char = 0;
4288 else
4289 cy_send_xchar(tty, START_CHAR(tty));
4290 }
4291
4292 if (tty->termios->c_cflag & CRTSCTS) {
4293 card = info->card;
4294 channel = info->line - card->first_line;
4295 if (!IS_CYC_Z(*card)) {
4296 chip = channel >> 2;
4297 channel &= 0x03;
4298 index = card->bus_index;
4299 base_addr = card->base_addr +
4300 (cy_chip_offset[chip] << index);
4301
4302 spin_lock_irqsave(&card->card_lock, flags);
4303 cy_writeb(base_addr + (CyCAR << index),
4304 (u_char) channel);
4305 if (info->rtsdtr_inv) {
4306 cy_writeb(base_addr + (CyMSVR2 << index),
4307 CyDTR);
4308 } else {
4309 cy_writeb(base_addr + (CyMSVR1 << index),
4310 CyRTS);
4311 }
4312 spin_unlock_irqrestore(&card->card_lock, flags);
4313 } else {
4314 info->throttle = 0;
4315 }
4316 }
4317 } /* cy_unthrottle */
4318
4319 /* cy_start and cy_stop provide software output flow control as a
4320 function of XON/XOFF, software CTS, and other such stuff.
4321 */
4322 static void cy_stop(struct tty_struct *tty)
4323 {
4324 struct cyclades_card *cinfo;
4325 struct cyclades_port *info = tty->driver_data;
4326 void __iomem *base_addr;
4327 int chip, channel, index;
4328 unsigned long flags;
4329
4330 #ifdef CY_DEBUG_OTHER
4331 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4332 #endif
4333
4334 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4335 return;
4336
4337 cinfo = info->card;
4338 channel = info->line - cinfo->first_line;
4339 if (!IS_CYC_Z(*cinfo)) {
4340 index = cinfo->bus_index;
4341 chip = channel >> 2;
4342 channel &= 0x03;
4343 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4344
4345 spin_lock_irqsave(&cinfo->card_lock, flags);
4346 cy_writeb(base_addr + (CyCAR << index),
4347 (u_char)(channel & 0x0003)); /* index channel */
4348 cy_writeb(base_addr + (CySRER << index),
4349 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4350 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4351 } else {
4352 /* Nothing to do! */
4353 }
4354 } /* cy_stop */
4355
4356 static void cy_start(struct tty_struct *tty)
4357 {
4358 struct cyclades_card *cinfo;
4359 struct cyclades_port *info = tty->driver_data;
4360 void __iomem *base_addr;
4361 int chip, channel, index;
4362 unsigned long flags;
4363
4364 #ifdef CY_DEBUG_OTHER
4365 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4366 #endif
4367
4368 if (serial_paranoia_check(info, tty->name, "cy_start"))
4369 return;
4370
4371 cinfo = info->card;
4372 channel = info->line - cinfo->first_line;
4373 index = cinfo->bus_index;
4374 if (!IS_CYC_Z(*cinfo)) {
4375 chip = channel >> 2;
4376 channel &= 0x03;
4377 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4378
4379 spin_lock_irqsave(&cinfo->card_lock, flags);
4380 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4381 cy_writeb(base_addr + (CySRER << index),
4382 readb(base_addr + (CySRER << index)) | CyTxRdy);
4383 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4384 } else {
4385 /* Nothing to do! */
4386 }
4387 } /* cy_start */
4388
4389 static void cy_flush_buffer(struct tty_struct *tty)
4390 {
4391 struct cyclades_port *info = tty->driver_data;
4392 struct cyclades_card *card;
4393 int channel, retval;
4394 unsigned long flags;
4395
4396 #ifdef CY_DEBUG_IO
4397 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4398 #endif
4399
4400 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4401 return;
4402
4403 card = info->card;
4404 channel = info->line - card->first_line;
4405
4406 spin_lock_irqsave(&card->card_lock, flags);
4407 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4408 spin_unlock_irqrestore(&card->card_lock, flags);
4409
4410 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
4411 buffers as well */
4412 spin_lock_irqsave(&card->card_lock, flags);
4413 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4414 if (retval != 0) {
4415 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4416 "was %x\n", info->line, retval);
4417 }
4418 spin_unlock_irqrestore(&card->card_lock, flags);
4419 }
4420 tty_wakeup(tty);
4421 } /* cy_flush_buffer */
4422
4423 /*
4424 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4425 */
4426 static void cy_hangup(struct tty_struct *tty)
4427 {
4428 struct cyclades_port *info = tty->driver_data;
4429
4430 #ifdef CY_DEBUG_OTHER
4431 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4432 #endif
4433
4434 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4435 return;
4436
4437 cy_flush_buffer(tty);
4438 shutdown(info);
4439 info->event = 0;
4440 info->count = 0;
4441 #ifdef CY_DEBUG_COUNT
4442 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4443 current->pid);
4444 #endif
4445 info->tty = NULL;
4446 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4447 wake_up_interruptible(&info->open_wait);
4448 } /* cy_hangup */
4449
4450 /*
4451 * ---------------------------------------------------------------------
4452 * cy_init() and friends
4453 *
4454 * cy_init() is called at boot-time to initialize the serial driver.
4455 * ---------------------------------------------------------------------
4456 */
4457
4458 static void __devinit cy_init_card(struct cyclades_card *cinfo)
4459 {
4460 struct cyclades_port *info;
4461 u32 mailbox;
4462 unsigned int nports;
4463 unsigned short chip_number;
4464 int index, port;
4465
4466 spin_lock_init(&cinfo->card_lock);
4467
4468 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4469 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4470 cinfo->ctl_addr)->mail_box_0);
4471 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4472 cinfo->intr_enabled = 0;
4473 cinfo->nports = 0; /* Will be correctly set later, after
4474 Z FW is loaded */
4475 } else {
4476 index = cinfo->bus_index;
4477 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4478 }
4479
4480 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4481 port++) {
4482 info = &cy_port[port];
4483 memset(info, 0, sizeof(*info));
4484 info->magic = CYCLADES_MAGIC;
4485 info->card = cinfo;
4486 info->line = port;
4487 info->flags = STD_COM_FLAGS;
4488 info->closing_wait = CLOSING_WAIT_DELAY;
4489 info->close_delay = 5 * HZ / 10;
4490
4491 INIT_WORK(&info->tqueue, do_softint);
4492 init_waitqueue_head(&info->open_wait);
4493 init_waitqueue_head(&info->close_wait);
4494 init_completion(&info->shutdown_wait);
4495 init_waitqueue_head(&info->delta_msr_wait);
4496
4497 if (IS_CYC_Z(*cinfo)) {
4498 info->type = PORT_STARTECH;
4499 if (mailbox == ZO_V1)
4500 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4501 else
4502 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4503 #ifdef CONFIG_CYZ_INTR
4504 setup_timer(&cyz_rx_full_timer[port],
4505 cyz_rx_restart, (unsigned long)info);
4506 #endif
4507 } else {
4508 info->type = PORT_CIRRUS;
4509 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4510 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4511 info->cor2 = CyETC;
4512 info->cor3 = 0x08; /* _very_ small rcv threshold */
4513
4514 chip_number = (port - cinfo->first_line) / 4;
4515 if ((info->chip_rev = readb(cinfo->base_addr +
4516 (cy_chip_offset[chip_number] <<
4517 index) + (CyGFRCR << index))) >=
4518 CD1400_REV_J) {
4519 /* It is a CD1400 rev. J or later */
4520 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4521 info->tco = baud_co_60[13]; /* Tx CO */
4522 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4523 info->rco = baud_co_60[13]; /* Rx CO */
4524 info->rtsdtr_inv = 1;
4525 } else {
4526 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4527 info->tco = baud_co_25[13]; /* Tx CO */
4528 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4529 info->rco = baud_co_25[13]; /* Rx CO */
4530 info->rtsdtr_inv = 0;
4531 }
4532 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4533 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4534 }
4535
4536 }
4537
4538 #ifndef CONFIG_CYZ_INTR
4539 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4540 mod_timer(&cyz_timerlist, jiffies + 1);
4541 #ifdef CY_PCI_DEBUG
4542 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4543 #endif
4544 }
4545 #endif
4546 }
4547
4548 /* initialize chips on Cyclom-Y card -- return number of valid
4549 chips (which is number of ports/4) */
4550 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4551 int index)
4552 {
4553 unsigned int chip_number;
4554 void __iomem *base_addr;
4555
4556 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4557 /* Cy_HwReset is 0x1400 */
4558 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4559 /* Cy_ClrIntr is 0x1800 */
4560 udelay(500L);
4561
4562 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4563 base_addr =
4564 true_base_addr + (cy_chip_offset[chip_number] << index);
4565 mdelay(1);
4566 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4567 /*************
4568 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4569 chip_number, (unsigned long)base_addr);
4570 *************/
4571 return chip_number;
4572 }
4573
4574 cy_writeb(base_addr + (CyGFRCR << index), 0);
4575 udelay(10L);
4576
4577 /* The Cyclom-16Y does not decode address bit 9 and therefore
4578 cannot distinguish between references to chip 0 and a non-
4579 existent chip 4. If the preceding clearing of the supposed
4580 chip 4 GFRCR register appears at chip 0, there is no chip 4
4581 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4582 */
4583 if (chip_number == 4 && readb(true_base_addr +
4584 (cy_chip_offset[0] << index) +
4585 (CyGFRCR << index)) == 0) {
4586 return chip_number;
4587 }
4588
4589 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4590 mdelay(1);
4591
4592 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4593 /*
4594 printk(" chip #%d at %#6lx is not responding ",
4595 chip_number, (unsigned long)base_addr);
4596 printk("(GFRCR stayed 0)\n",
4597 */
4598 return chip_number;
4599 }
4600 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4601 0x40) {
4602 /*
4603 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4604 "%#2x)\n",
4605 chip_number, (unsigned long)base_addr,
4606 base_addr[CyGFRCR<<index]);
4607 */
4608 return chip_number;
4609 }
4610 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4611 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4612 /* It is a CD1400 rev. J or later */
4613 /* Impossible to reach 5ms with this chip.
4614 Changed to 2ms instead (f = 500 Hz). */
4615 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4616 } else {
4617 /* f = 200 Hz */
4618 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4619 }
4620
4621 /*
4622 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4623 chip_number, (unsigned long)base_addr,
4624 readb(base_addr+(CyGFRCR<<index)));
4625 */
4626 }
4627 return chip_number;
4628 } /* cyy_init_card */
4629
4630 /*
4631 * ---------------------------------------------------------------------
4632 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4633 * sets global variables and return the number of ISA boards found.
4634 * ---------------------------------------------------------------------
4635 */
4636 static int __init cy_detect_isa(void)
4637 {
4638 #ifdef CONFIG_ISA
4639 unsigned short cy_isa_irq, nboard;
4640 void __iomem *cy_isa_address;
4641 unsigned short i, j, cy_isa_nchan;
4642 #ifdef MODULE
4643 int isparam = 0;
4644 #endif
4645
4646 nboard = 0;
4647
4648 #ifdef MODULE
4649 /* Check for module parameters */
4650 for (i = 0; i < NR_CARDS; i++) {
4651 if (maddr[i] || i) {
4652 isparam = 1;
4653 cy_isa_addresses[i] = maddr[i];
4654 }
4655 if (!maddr[i])
4656 break;
4657 }
4658 #endif
4659
4660 /* scan the address table probing for Cyclom-Y/ISA boards */
4661 for (i = 0; i < NR_ISA_ADDRS; i++) {
4662 unsigned int isa_address = cy_isa_addresses[i];
4663 if (isa_address == 0x0000) {
4664 return nboard;
4665 }
4666
4667 /* probe for CD1400... */
4668 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4669 cy_isa_nchan = CyPORTS_PER_CHIP *
4670 cyy_init_card(cy_isa_address, 0);
4671 if (cy_isa_nchan == 0) {
4672 continue;
4673 }
4674 #ifdef MODULE
4675 if (isparam && irq[i])
4676 cy_isa_irq = irq[i];
4677 else
4678 #endif
4679 /* find out the board's irq by probing */
4680 cy_isa_irq = detect_isa_irq(cy_isa_address);
4681 if (cy_isa_irq == 0) {
4682 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4683 "IRQ could not be detected.\n",
4684 (unsigned long)cy_isa_address);
4685 continue;
4686 }
4687
4688 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4689 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4690 "more channels are available. Change NR_PORTS "
4691 "in cyclades.c and recompile kernel.\n",
4692 (unsigned long)cy_isa_address);
4693 return nboard;
4694 }
4695 /* fill the next cy_card structure available */
4696 for (j = 0; j < NR_CARDS; j++) {
4697 if (cy_card[j].base_addr == 0)
4698 break;
4699 }
4700 if (j == NR_CARDS) { /* no more cy_cards available */
4701 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4702 "more cards can be used. Change NR_CARDS in "
4703 "cyclades.c and recompile kernel.\n",
4704 (unsigned long)cy_isa_address);
4705 return nboard;
4706 }
4707
4708 /* allocate IRQ */
4709 if (request_irq(cy_isa_irq, cyy_interrupt,
4710 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4711 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4712 "could not allocate IRQ#%d.\n",
4713 (unsigned long)cy_isa_address, cy_isa_irq);
4714 return nboard;
4715 }
4716
4717 /* set cy_card */
4718 cy_card[j].base_addr = cy_isa_address;
4719 cy_card[j].ctl_addr = NULL;
4720 cy_card[j].irq = (int)cy_isa_irq;
4721 cy_card[j].bus_index = 0;
4722 cy_card[j].first_line = cy_next_channel;
4723 cy_card[j].num_chips = cy_isa_nchan / 4;
4724 cy_init_card(&cy_card[j]);
4725 nboard++;
4726
4727 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4728 "%d channels starting from port %d\n",
4729 j + 1, (unsigned long)cy_isa_address,
4730 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4731 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4732
4733 for (j = cy_next_channel;
4734 j < cy_next_channel + cy_isa_nchan; j++)
4735 tty_register_device(cy_serial_driver, j, NULL);
4736 cy_next_channel += cy_isa_nchan;
4737 }
4738 return nboard;
4739 #else
4740 return 0;
4741 #endif /* CONFIG_ISA */
4742 } /* cy_detect_isa */
4743
4744 #ifdef CONFIG_PCI
4745 static void __devinit plx_init(void __iomem * addr, __u32 initctl)
4746 {
4747 /* Reset PLX */
4748 cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
4749 udelay(100L);
4750 cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
4751
4752 /* Reload Config. Registers from EEPROM */
4753 cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
4754 udelay(100L);
4755 cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
4756 }
4757
4758 static int __devinit cy_init_Ze(struct RUNTIME_9060 __iomem *cy_pci_addr0,
4759 int cy_pci_irq, struct pci_dev *pdev)
4760 {
4761 void __iomem *cy_pci_addr2;
4762 unsigned int j;
4763 unsigned short cy_pci_nchan;
4764
4765 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ze_win);
4766
4767 readl(&cy_pci_addr0->mail_box_0);
4768 dev_dbg(&pdev->dev, "new Cyclades-Z board. FPGA not loaded\n");
4769
4770 /* This must be the new Cyclades-Ze/PCI. */
4771 cy_pci_nchan = ZE_V1_NPORTS;
4772
4773 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4774 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no channels "
4775 "are available.\nChange NR_PORTS in cyclades.c "
4776 "and recompile kernel.\n");
4777 return -EIO;
4778 }
4779
4780 /* fill the next cy_card structure available */
4781 for (j = 0; j < NR_CARDS; j++) {
4782 if (cy_card[j].base_addr == 0)
4783 break;
4784 }
4785 if (j == NR_CARDS) { /* no more cy_cards available */
4786 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no more "
4787 "cards can be used.\nChange NR_CARDS in "
4788 "cyclades.c and recompile kernel.\n");
4789 return -EIO;
4790 }
4791 #ifdef CONFIG_CYZ_INTR
4792 /* allocate IRQ only if board has an IRQ */
4793 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
4794 if (request_irq(cy_pci_irq, cyz_interrupt,
4795 IRQF_SHARED, "Cyclades-Z",
4796 &cy_card[j])) {
4797 dev_err(&pdev->dev, "could not allocate IRQ.\n");
4798 return -EIO;
4799 }
4800 }
4801 #endif /* CONFIG_CYZ_INTR */
4802
4803 /* set cy_card */
4804 cy_card[j].base_addr = cy_pci_addr2;
4805 cy_card[j].ctl_addr = cy_pci_addr0;
4806 cy_card[j].irq = cy_pci_irq;
4807 cy_card[j].bus_index = 1;
4808 cy_card[j].first_line = cy_next_channel;
4809 cy_card[j].num_chips = -1;
4810 cy_init_card(&cy_card[j]);
4811 pci_set_drvdata(pdev, &cy_card[j]);
4812
4813 dev_info(&pdev->dev, "Cyclades-Ze/PCI #%d found: %d channels starting "
4814 "from port %d.\n", j + 1, cy_pci_nchan, cy_next_channel);
4815
4816 for (j = cy_next_channel; j < cy_next_channel + cy_pci_nchan; j++)
4817 tty_register_device(cy_serial_driver, j, &pdev->dev);
4818 cy_next_channel += cy_pci_nchan;
4819
4820 return 0;
4821 }
4822
4823 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4824 const struct pci_device_id *ent)
4825 {
4826 unsigned char cyy_rev_id;
4827 int cy_pci_irq;
4828 __u32 mailbox;
4829 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4830 unsigned int device_id;
4831 unsigned short j, cy_pci_nchan, plx_ver;
4832 int retval;
4833
4834 retval = pci_enable_device(pdev);
4835 if (retval) {
4836 dev_err(&pdev->dev, "cannot enable device\n");
4837 return retval;
4838 }
4839
4840 /* read PCI configuration area */
4841 cy_pci_irq = pdev->irq;
4842 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4843
4844 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4845
4846 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4847 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4848 dev_dbg(&pdev->dev, "Cyclom-Y/PCI found\n");
4849
4850 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4851 dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
4852 "set. Ignoring it...\n");
4853 pdev->resource[2].flags &= ~IORESOURCE_IO;
4854 }
4855
4856 /* Although we don't use this I/O region, we should
4857 request it from the kernel anyway, to avoid problems
4858 with other drivers accessing it. */
4859 retval = pci_request_regions(pdev, "Cyclom-Y");
4860 if (retval) {
4861 dev_err(&pdev->dev, "failed to reserve resources\n");
4862 return retval;
4863 }
4864 #if defined(__alpha__)
4865 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4866 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for "
4867 "low addresses on Alpha systems.\n");
4868 return -EIO;
4869 }
4870 #endif
4871 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4872 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
4873
4874 dev_dbg(&pdev->dev, "Cyclom-Y/PCI: relocate winaddr=0x%p "
4875 "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
4876
4877 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4878 cyy_init_card(cy_pci_addr2, 1));
4879 if (cy_pci_nchan == 0) {
4880 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
4881 "Serial-Modules\n");
4882 return -EIO;
4883 }
4884 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4885 dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no "
4886 "channels are available. Change NR_PORTS in "
4887 "cyclades.c and recompile kernel.\n");
4888 return -EIO;
4889 }
4890 /* fill the next cy_card structure available */
4891 for (j = 0; j < NR_CARDS; j++) {
4892 if (cy_card[j].base_addr == 0)
4893 break;
4894 }
4895 if (j == NR_CARDS) { /* no more cy_cards available */
4896 dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no more "
4897 "cards can be used. Change NR_CARDS in "
4898 "cyclades.c and recompile kernel.\n");
4899 return -EIO;
4900 }
4901
4902 /* allocate IRQ */
4903 retval = request_irq(cy_pci_irq, cyy_interrupt,
4904 IRQF_SHARED, "Cyclom-Y", &cy_card[j]);
4905 if (retval) {
4906 dev_err(&pdev->dev, "could not allocate IRQ\n");
4907 return retval;
4908 }
4909
4910 /* set cy_card */
4911 cy_card[j].base_addr = cy_pci_addr2;
4912 cy_card[j].ctl_addr = cy_pci_addr0;
4913 cy_card[j].irq = cy_pci_irq;
4914 cy_card[j].bus_index = 1;
4915 cy_card[j].first_line = cy_next_channel;
4916 cy_card[j].num_chips = cy_pci_nchan / 4;
4917 cy_init_card(&cy_card[j]);
4918 pci_set_drvdata(pdev, &cy_card[j]);
4919
4920 /* enable interrupts in the PCI interface */
4921 plx_ver = readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4922 switch (plx_ver) {
4923 case PLX_9050:
4924
4925 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4926 break;
4927
4928 case PLX_9060:
4929 case PLX_9080:
4930 default: /* Old boards, use PLX_9060 */
4931
4932 plx_init(cy_pci_addr0, 0x6c);
4933 /* For some yet unknown reason, once the PLX9060 reloads
4934 the EEPROM, the IRQ is lost and, thus, we have to
4935 re-write it to the PCI config. registers.
4936 This will remain here until we find a permanent
4937 fix. */
4938 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4939 cy_pci_irq);
4940
4941 cy_writew(cy_pci_addr0 + 0x68,
4942 readw(cy_pci_addr0 + 0x68) | 0x0900);
4943 break;
4944 }
4945
4946 dev_info(&pdev->dev, "Cyclom-Y/PCI #%d found: %d channels "
4947 "starting from port %d.\n", j + 1, cy_pci_nchan,
4948 cy_next_channel);
4949
4950 for (j = cy_next_channel;
4951 j < cy_next_channel + cy_pci_nchan; j++)
4952 tty_register_device(cy_serial_driver, j, &pdev->dev);
4953
4954 cy_next_channel += cy_pci_nchan;
4955 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4956 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for "
4957 "low addresses\n");
4958 return -EIO;
4959 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4960 dev_dbg(&pdev->dev, "Cyclades-Z/PCI found\n");
4961
4962 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
4963
4964 /* Disable interrupts on the PLX before resetting it */
4965 cy_writew(cy_pci_addr0 + 0x68,
4966 readw(cy_pci_addr0 + 0x68) & ~0x0900);
4967
4968 plx_init(cy_pci_addr0, 0x6c);
4969 /* For some yet unknown reason, once the PLX9060 reloads
4970 the EEPROM, the IRQ is lost and, thus, we have to
4971 re-write it to the PCI config. registers.
4972 This will remain here until we find a permanent
4973 fix. */
4974 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
4975
4976 mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
4977 cy_pci_addr0)->mail_box_0);
4978
4979 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4980 dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
4981 "set. Ignoring it...\n");
4982 pdev->resource[2].flags &= ~IORESOURCE_IO;
4983 }
4984
4985 /* Although we don't use this I/O region, we should
4986 request it from the kernel anyway, to avoid problems
4987 with other drivers accessing it. */
4988 retval = pci_request_regions(pdev, "Cyclades-Z");
4989 if (retval) {
4990 dev_err(&pdev->dev, "failed to reserve resources\n");
4991 return retval;
4992 }
4993
4994 if (mailbox == ZE_V1) {
4995 retval = cy_init_Ze(cy_pci_addr0, cy_pci_irq, pdev);
4996 return retval;
4997 } else {
4998 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Zwin);
4999 }
5000
5001 dev_dbg(&pdev->dev, "Cyclades-Z/PCI: relocate winaddr=0x%p "
5002 "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
5003 #ifdef CY_PCI_DEBUG
5004 if (mailbox == ZO_V1) {
5005 cy_writel(&((struct RUNTIME_9060 *)
5006 (cy_pci_addr0))->loc_addr_base,
5007 WIN_CREG);
5008 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA id %lx, "
5009 "ver %lx\n", (ulong)(0xff &
5010 readl(&((struct CUSTOM_REG *)
5011 cy_pci_addr2)->fpga_id)),
5012 (ulong)(0xff & readl(&((struct CUSTOM_REG *)
5013 cy_pci_addr2)->fpga_version)));
5014 cy_writel(&((struct RUNTIME_9060 *)
5015 cy_pci_addr0)->loc_addr_base, WIN_RAM);
5016 } else {
5017 dev_info(&pdev->dev, "Cyclades-Z/PCI: New Cyclades-Z "
5018 "board. FPGA not loaded\n");
5019 }
5020 #endif
5021 /* The following clears the firmware id word. This
5022 ensures that the driver will not attempt to talk to
5023 the board until it has been properly initialized.
5024 */
5025 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5026 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5027
5028 /* This must be a Cyclades-8Zo/PCI. The extendable
5029 version will have a different device_id and will
5030 be allocated its maximum number of ports. */
5031 cy_pci_nchan = 8;
5032
5033 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5034 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5035 "channels are available. Change NR_PORTS in "
5036 "cyclades.c and recompile kernel.\n");
5037 return -EIO;
5038 }
5039
5040 /* fill the next cy_card structure available */
5041 for (j = 0; j < NR_CARDS; j++) {
5042 if (cy_card[j].base_addr == 0)
5043 break;
5044 }
5045 if (j == NR_CARDS) { /* no more cy_cards available */
5046 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5047 "more cards can be used. Change NR_CARDS in "
5048 "cyclades.c and recompile kernel.\n");
5049 return -EIO;
5050 }
5051 #ifdef CONFIG_CYZ_INTR
5052 /* allocate IRQ only if board has an IRQ */
5053 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5054 retval = request_irq(cy_pci_irq, cyz_interrupt,
5055 IRQF_SHARED, "Cyclades-Z",
5056 &cy_card[j]);
5057 if (retval) {
5058 dev_err(&pdev->dev, "could not allocate IRQ\n");
5059 return retval;
5060 }
5061 }
5062 #endif /* CONFIG_CYZ_INTR */
5063
5064 /* set cy_card */
5065 cy_card[j].base_addr = cy_pci_addr2;
5066 cy_card[j].ctl_addr = cy_pci_addr0;
5067 cy_card[j].irq = cy_pci_irq;
5068 cy_card[j].bus_index = 1;
5069 cy_card[j].first_line = cy_next_channel;
5070 cy_card[j].num_chips = -1;
5071 cy_init_card(&cy_card[j]);
5072 pci_set_drvdata(pdev, &cy_card[j]);
5073
5074 dev_info(&pdev->dev, "Cyclades-8Zo/PCI #%d found: %d channels "
5075 "starting from port %d.\n", j + 1, cy_pci_nchan,
5076 cy_next_channel);
5077
5078 for (j = cy_next_channel;
5079 j < cy_next_channel + cy_pci_nchan; j++)
5080 tty_register_device(cy_serial_driver, j, &pdev->dev);
5081 cy_next_channel += cy_pci_nchan;
5082 }
5083
5084 return 0;
5085 }
5086
5087 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5088 {
5089 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5090 unsigned int i;
5091
5092 /* non-Z with old PLX */
5093 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5094 PLX_9050)
5095 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5096 else
5097 #ifndef CONFIG_CYZ_INTR
5098 if (!IS_CYC_Z(*cinfo))
5099 #endif
5100 cy_writew(cinfo->ctl_addr + 0x68,
5101 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5102
5103 pci_iounmap(pdev, cinfo->base_addr);
5104 if (cinfo->ctl_addr)
5105 pci_iounmap(pdev, cinfo->ctl_addr);
5106 if (cinfo->irq
5107 #ifndef CONFIG_CYZ_INTR
5108 && !IS_CYC_Z(*cinfo)
5109 #endif /* CONFIG_CYZ_INTR */
5110 )
5111 free_irq(cinfo->irq, cinfo);
5112 pci_release_regions(pdev);
5113
5114 cinfo->base_addr = NULL;
5115 for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
5116 cy_port[i].line = -1;
5117 cy_port[i].magic = -1;
5118 }
5119 for (i = cinfo->first_line; i < cinfo->first_line +
5120 cinfo->nports; i++)
5121 tty_unregister_device(cy_serial_driver, i);
5122 }
5123
5124 static struct pci_driver cy_pci_driver = {
5125 .name = "cyclades",
5126 .id_table = cy_pci_dev_id,
5127 .probe = cy_pci_probe,
5128 .remove = __devexit_p(cy_pci_remove)
5129 };
5130 #endif
5131
5132 static int
5133 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5134 int *eof, void *data)
5135 {
5136 struct cyclades_port *info;
5137 int i;
5138 int len = 0;
5139 off_t begin = 0;
5140 off_t pos = 0;
5141 int size;
5142 __u32 cur_jifs = jiffies;
5143
5144 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5145 "IdleIn Overruns Ldisc\n");
5146
5147 pos += size;
5148 len += size;
5149
5150 /* Output one line for each known port */
5151 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5152 info = &cy_port[i];
5153
5154 if (info->count)
5155 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5156 "%8lu %9lu %6ld\n", info->line,
5157 (cur_jifs - info->idle_stats.in_use) / HZ,
5158 info->idle_stats.xmit_bytes,
5159 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
5160 info->idle_stats.recv_bytes,
5161 (cur_jifs - info->idle_stats.recv_idle) / HZ,
5162 info->idle_stats.overruns,
5163 (long)info->tty->ldisc.num);
5164 else
5165 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5166 "%8lu %9lu %6ld\n",
5167 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5168 len += size;
5169 pos = begin + len;
5170
5171 if (pos < offset) {
5172 len = 0;
5173 begin = pos;
5174 }
5175 if (pos > offset + length)
5176 goto done;
5177 }
5178 *eof = 1;
5179 done:
5180 *start = buf + (offset - begin); /* Start of wanted data */
5181 len -= (offset - begin); /* Start slop */
5182 if (len > length)
5183 len = length; /* Ending slop */
5184 if (len < 0)
5185 len = 0;
5186 return len;
5187 }
5188
5189 /* The serial driver boot-time initialization code!
5190 Hardware I/O ports are mapped to character special devices on a
5191 first found, first allocated manner. That is, this code searches
5192 for Cyclom cards in the system. As each is found, it is probed
5193 to discover how many chips (and thus how many ports) are present.
5194 These ports are mapped to the tty ports 32 and upward in monotonic
5195 fashion. If an 8-port card is replaced with a 16-port card, the
5196 port mapping on a following card will shift.
5197
5198 This approach is different from what is used in the other serial
5199 device driver because the Cyclom is more properly a multiplexer,
5200 not just an aggregation of serial ports on one card.
5201
5202 If there are more cards with more ports than have been
5203 statically allocated above, a warning is printed and the
5204 extra ports are ignored.
5205 */
5206
5207 static const struct tty_operations cy_ops = {
5208 .open = cy_open,
5209 .close = cy_close,
5210 .write = cy_write,
5211 .put_char = cy_put_char,
5212 .flush_chars = cy_flush_chars,
5213 .write_room = cy_write_room,
5214 .chars_in_buffer = cy_chars_in_buffer,
5215 .flush_buffer = cy_flush_buffer,
5216 .ioctl = cy_ioctl,
5217 .throttle = cy_throttle,
5218 .unthrottle = cy_unthrottle,
5219 .set_termios = cy_set_termios,
5220 .stop = cy_stop,
5221 .start = cy_start,
5222 .hangup = cy_hangup,
5223 .break_ctl = cy_break,
5224 .wait_until_sent = cy_wait_until_sent,
5225 .read_proc = cyclades_get_proc_info,
5226 .tiocmget = cy_tiocmget,
5227 .tiocmset = cy_tiocmset,
5228 };
5229
5230 static int __init cy_init(void)
5231 {
5232 unsigned int i, nboards;
5233 int retval = -ENOMEM;
5234
5235 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5236 if (!cy_serial_driver)
5237 goto err;
5238
5239 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5240 __DATE__, __TIME__);
5241
5242 /* Initialize the tty_driver structure */
5243
5244 cy_serial_driver->owner = THIS_MODULE;
5245 cy_serial_driver->driver_name = "cyclades";
5246 cy_serial_driver->name = "ttyC";
5247 cy_serial_driver->major = CYCLADES_MAJOR;
5248 cy_serial_driver->minor_start = 0;
5249 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5250 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5251 cy_serial_driver->init_termios = tty_std_termios;
5252 cy_serial_driver->init_termios.c_cflag =
5253 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5254 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5255 tty_set_operations(cy_serial_driver, &cy_ops);
5256
5257 retval = tty_register_driver(cy_serial_driver);
5258 if (retval) {
5259 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5260 goto err_frtty;
5261 }
5262
5263 for (i = 0; i < NR_PORTS; i++) {
5264 cy_port[i].line = -1;
5265 cy_port[i].magic = -1;
5266 }
5267
5268 /* the code below is responsible to find the boards. Each different
5269 type of board has its own detection routine. If a board is found,
5270 the next cy_card structure available is set by the detection
5271 routine. These functions are responsible for checking the
5272 availability of cy_card and cy_port data structures and updating
5273 the cy_next_channel. */
5274
5275 /* look for isa boards */
5276 nboards = cy_detect_isa();
5277
5278 #ifdef CONFIG_PCI
5279 /* look for pci boards */
5280 retval = pci_register_driver(&cy_pci_driver);
5281 if (retval && !nboards)
5282 goto err_unr;
5283 #endif
5284
5285 return 0;
5286 err_unr:
5287 tty_unregister_driver(cy_serial_driver);
5288 err_frtty:
5289 put_tty_driver(cy_serial_driver);
5290 err:
5291 return retval;
5292 } /* cy_init */
5293
5294 static void __exit cy_cleanup_module(void)
5295 {
5296 int i, e1;
5297
5298 #ifndef CONFIG_CYZ_INTR
5299 del_timer_sync(&cyz_timerlist);
5300 #endif /* CONFIG_CYZ_INTR */
5301
5302 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5303 printk(KERN_ERR "failed to unregister Cyclades serial "
5304 "driver(%d)\n", e1);
5305
5306 put_tty_driver(cy_serial_driver);
5307
5308 #ifdef CONFIG_PCI
5309 pci_unregister_driver(&cy_pci_driver);
5310 #endif
5311
5312 for (i = 0; i < NR_CARDS; i++) {
5313 if (cy_card[i].base_addr) {
5314 /* clear interrupt */
5315 cy_writeb(cy_card[i].base_addr + Cy_ClrIntr, 0);
5316 iounmap(cy_card[i].base_addr);
5317 if (cy_card[i].ctl_addr)
5318 iounmap(cy_card[i].ctl_addr);
5319 if (cy_card[i].irq
5320 #ifndef CONFIG_CYZ_INTR
5321 && !IS_CYC_Z(cy_card[i])
5322 #endif /* CONFIG_CYZ_INTR */
5323 )
5324 free_irq(cy_card[i].irq, &cy_card[i]);
5325 for (e1 = cy_card[i].first_line;
5326 e1 < cy_card[i].first_line +
5327 cy_card[i].nports; e1++)
5328 tty_unregister_device(cy_serial_driver, e1);
5329 }
5330 }
5331 } /* cy_cleanup_module */
5332
5333 module_init(cy_init);
5334 module_exit(cy_cleanup_module);
5335
5336 MODULE_LICENSE("GPL");
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