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Char: cyclades, timers cleanup
[linux-2.6/mini2440.git] / drivers / char / cyclades.c
blob14652c1ed02401db595c29cf2b7431c445fe4872
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 #define CY_LOCK(info,flags) \
657 do { \
658 spin_lock_irqsave(&info->card->card_lock, flags); \
659 } while (0)
660
661 #define CY_UNLOCK(info,flags) \
662 do { \
663 spin_unlock_irqrestore(&info->card->card_lock, flags); \
664 } while (0)
665
666 #include <linux/kernel.h>
667 #include <linux/pci.h>
668
669 #include <linux/stat.h>
670 #include <linux/proc_fs.h>
671
672 static void cy_throttle(struct tty_struct *tty);
673 static void cy_send_xchar(struct tty_struct *tty, char ch);
674
675 #define IS_CYC_Z(card) ((card).num_chips == -1)
676
677 #define Z_FPGA_CHECK(card) \
678 ((readl(&((struct RUNTIME_9060 __iomem *) \
679 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
680
681 #define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
682 ((card).ctl_addr))->mail_box_0)) || \
683 Z_FPGA_CHECK(card)) && \
684 (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
685 ((card).base_addr+ID_ADDRESS))->signature)))
686
687 #ifndef SERIAL_XMIT_SIZE
688 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
689 #endif
690 #define WAKEUP_CHARS 256
691
692 #define STD_COM_FLAGS (0)
693
694 static struct tty_driver *cy_serial_driver;
695
696 #ifdef CONFIG_ISA
697 /* This is the address lookup table. The driver will probe for
698 Cyclom-Y/ISA boards at all addresses in here. If you want the
699 driver to probe addresses at a different address, add it to
700 this table. If the driver is probing some other board and
701 causing problems, remove the offending address from this table.
702 The cy_setup function extracts additional addresses from the
703 boot options line. The form is "cyclades=address,address..."
704 */
705
706 static unsigned int cy_isa_addresses[] = {
707 0xD0000,
708 0xD2000,
709 0xD4000,
710 0xD6000,
711 0xD8000,
712 0xDA000,
713 0xDC000,
714 0xDE000,
715 0, 0, 0, 0, 0, 0, 0, 0
716 };
717
718 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
719
720 #ifdef MODULE
721 static long maddr[NR_CARDS];
722 static int irq[NR_CARDS];
723
724 module_param_array(maddr, long, NULL, 0);
725 module_param_array(irq, int, NULL, 0);
726 #endif
727
728 #endif /* CONFIG_ISA */
729
730 /* This is the per-card data structure containing address, irq, number of
731 channels, etc. This driver supports a maximum of NR_CARDS cards.
732 */
733 static struct cyclades_card cy_card[NR_CARDS];
734
735 /* This is the per-channel data structure containing pointers, flags
736 and variables for the port. This driver supports a maximum of NR_PORTS.
737 */
738 static struct cyclades_port cy_port[NR_PORTS];
739
740 static int cy_next_channel; /* next minor available */
741
742 /*
743 * This is used to look up the divisor speeds and the timeouts
744 * We're normally limited to 15 distinct baud rates. The extra
745 * are accessed via settings in info->flags.
746 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
747 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
748 * HI VHI
749 * 20
750 */
751 static int baud_table[] = {
752 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
753 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
754 230400, 0
755 };
756
757 static char baud_co_25[] = { /* 25 MHz clock option table */
758 /* value => 00 01 02 03 04 */
759 /* divide by 8 32 128 512 2048 */
760 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
761 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
762 };
763
764 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
765 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
766 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
767 };
768
769 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
770 /* value => 00 01 02 03 04 */
771 /* divide by 8 32 128 512 2048 */
772 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
773 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
774 0x00
775 };
776
777 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
778 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
779 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
780 0x21
781 };
782
783 static char baud_cor3[] = { /* receive threshold */
784 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
785 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
786 0x07
787 };
788
789 /*
790 * The Cyclades driver implements HW flow control as any serial driver.
791 * The cyclades_port structure member rflow and the vector rflow_thr
792 * allows us to take advantage of a special feature in the CD1400 to avoid
793 * data loss even when the system interrupt latency is too high. These flags
794 * are to be used only with very special applications. Setting these flags
795 * requires the use of a special cable (DTR and RTS reversed). In the new
796 * CD1400-based boards (rev. 6.00 or later), there is no need for special
797 * cables.
798 */
799
800 static char rflow_thr[] = { /* rflow threshold */
801 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
802 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
803 0x0a
804 };
805
806 /* The Cyclom-Ye has placed the sequential chips in non-sequential
807 * address order. This look-up table overcomes that problem.
808 */
809 static int cy_chip_offset[] = { 0x0000,
810 0x0400,
811 0x0800,
812 0x0C00,
813 0x0200,
814 0x0600,
815 0x0A00,
816 0x0E00
817 };
818
819 /* PCI related definitions */
820
821 #ifdef CONFIG_PCI
822 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
823 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
824 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
825 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
826 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
827 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
828 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
829 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
830 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
831 { } /* end of table */
832 };
833 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
834 #endif
835
836 static void cy_start(struct tty_struct *);
837 static void set_line_char(struct cyclades_port *);
838 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
839 #ifdef CONFIG_ISA
840 static unsigned detect_isa_irq(void __iomem *);
841 #endif /* CONFIG_ISA */
842
843 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
844
845 #ifndef CONFIG_CYZ_INTR
846 static void cyz_poll(unsigned long);
847
848 /* The Cyclades-Z polling cycle is defined by this variable */
849 static long cyz_polling_cycle = CZ_DEF_POLL;
850
851 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
852
853 #else /* CONFIG_CYZ_INTR */
854 static void cyz_rx_restart(unsigned long);
855 static struct timer_list cyz_rx_full_timer[NR_PORTS];
856 #endif /* CONFIG_CYZ_INTR */
857
858 static inline int serial_paranoia_check(struct cyclades_port *info,
859 char *name, const char *routine)
860 {
861 #ifdef SERIAL_PARANOIA_CHECK
862 if (!info) {
863 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
864 "in %s\n", name, routine);
865 return 1;
866 }
867
868 if ((long)info < (long)(&cy_port[0]) ||
869 (long)(&cy_port[NR_PORTS]) < (long)info) {
870 printk(KERN_WARNING "cyc Warning: cyclades_port out of range "
871 "for (%s) in %s\n", name, routine);
872 return 1;
873 }
874
875 if (info->magic != CYCLADES_MAGIC) {
876 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
877 "struct (%s) in %s\n", name, routine);
878 return 1;
879 }
880 #endif
881 return 0;
882 } /* serial_paranoia_check */
883
884 /*
885 * This routine is used by the interrupt handler to schedule
886 * processing in the software interrupt portion of the driver
887 * (also known as the "bottom half"). This can be called any
888 * number of times for any channel without harm.
889 */
890 static inline void cy_sched_event(struct cyclades_port *info, int event)
891 {
892 info->event |= 1 << event; /* remember what kind of event and who */
893 schedule_work(&info->tqueue);
894 } /* cy_sched_event */
895
896 /*
897 * This routine is used to handle the "bottom half" processing for the
898 * serial driver, known also the "software interrupt" processing.
899 * This processing is done at the kernel interrupt level, after the
900 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
901 * is where time-consuming activities which can not be done in the
902 * interrupt driver proper are done; the interrupt driver schedules
903 * them using cy_sched_event(), and they get done here.
904 *
905 * This is done through one level of indirection--the task queue.
906 * When a hardware interrupt service routine wants service by the
907 * driver's bottom half, it enqueues the appropriate tq_struct (one
908 * per port) to the keventd work queue and sets a request flag
909 * that the work queue be processed.
910 *
911 * Although this may seem unwieldy, it gives the system a way to
912 * pass an argument (in this case the pointer to the cyclades_port
913 * structure) to the bottom half of the driver. Previous kernels
914 * had to poll every port to see if that port needed servicing.
915 */
916 static void
917 do_softint(struct work_struct *work)
918 {
919 struct cyclades_port *info =
920 container_of(work, struct cyclades_port, tqueue);
921 struct tty_struct *tty;
922
923 tty = info->tty;
924 if (!tty)
925 return;
926
927 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
928 tty_hangup(info->tty);
929 wake_up_interruptible(&info->open_wait);
930 info->flags &= ~ASYNC_NORMAL_ACTIVE;
931 }
932 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
933 wake_up_interruptible(&info->open_wait);
934 #ifdef CONFIG_CYZ_INTR
935 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event) &&
936 !timer_pending(&cyz_rx_full_timer[info->line]))
937 mod_timer(&cyz_rx_full_timer[info->line], jiffies + 1);
938 #endif
939 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
940 wake_up_interruptible(&info->delta_msr_wait);
941 tty_wakeup(tty);
942 #ifdef Z_WAKE
943 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
944 complete(&info->shutdown_wait);
945 #endif
946 } /* do_softint */
947
948
949 /***********************************************************/
950 /********* Start of block of Cyclom-Y specific code ********/
951
952 /* This routine waits up to 1000 micro-seconds for the previous
953 command to the Cirrus chip to complete and then issues the
954 new command. An error is returned if the previous command
955 didn't finish within the time limit.
956
957 This function is only called from inside spinlock-protected code.
958 */
959 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
960 {
961 unsigned int i;
962
963 /* Check to see that the previous command has completed */
964 for (i = 0; i < 100; i++) {
965 if (readb(base_addr + (CyCCR << index)) == 0) {
966 break;
967 }
968 udelay(10L);
969 }
970 /* if the CCR never cleared, the previous command
971 didn't finish within the "reasonable time" */
972 if (i == 100)
973 return -1;
974
975 /* Issue the new command */
976 cy_writeb(base_addr + (CyCCR << index), cmd);
977
978 return 0;
979 } /* cyy_issue_cmd */
980
981 #ifdef CONFIG_ISA
982 /* ISA interrupt detection code */
983 static unsigned detect_isa_irq(void __iomem * address)
984 {
985 int irq;
986 unsigned long irqs, flags;
987 int save_xir, save_car;
988 int index = 0; /* IRQ probing is only for ISA */
989
990 /* forget possible initially masked and pending IRQ */
991 irq = probe_irq_off(probe_irq_on());
992
993 /* Clear interrupts on the board first */
994 cy_writeb(address + (Cy_ClrIntr << index), 0);
995 /* Cy_ClrIntr is 0x1800 */
996
997 irqs = probe_irq_on();
998 /* Wait ... */
999 udelay(5000L);
1000
1001 /* Enable the Tx interrupts on the CD1400 */
1002 local_irq_save(flags);
1003 cy_writeb(address + (CyCAR << index), 0);
1004 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1005
1006 cy_writeb(address + (CyCAR << index), 0);
1007 cy_writeb(address + (CySRER << index),
1008 readb(address + (CySRER << index)) | CyTxRdy);
1009 local_irq_restore(flags);
1010
1011 /* Wait ... */
1012 udelay(5000L);
1013
1014 /* Check which interrupt is in use */
1015 irq = probe_irq_off(irqs);
1016
1017 /* Clean up */
1018 save_xir = (u_char) readb(address + (CyTIR << index));
1019 save_car = readb(address + (CyCAR << index));
1020 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1021 cy_writeb(address + (CySRER << index),
1022 readb(address + (CySRER << index)) & ~CyTxRdy);
1023 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1024 cy_writeb(address + (CyCAR << index), (save_car));
1025 cy_writeb(address + (Cy_ClrIntr << index), 0);
1026 /* Cy_ClrIntr is 0x1800 */
1027
1028 return (irq > 0) ? irq : 0;
1029 }
1030 #endif /* CONFIG_ISA */
1031
1032 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1033 void __iomem * base_addr, int status, int index)
1034 {
1035 struct cyclades_port *info;
1036 struct tty_struct *tty;
1037 int char_count;
1038 int i, j, len, mdm_change, mdm_status, outch;
1039 int save_xir, channel, save_car;
1040 char data;
1041
1042 if (status & CySRReceive) { /* reception interrupt */
1043 #ifdef CY_DEBUG_INTERRUPTS
1044 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
1045 #endif
1046 /* determine the channel & change to that context */
1047 spin_lock(&cinfo->card_lock);
1048 save_xir = (u_char) readb(base_addr + (CyRIR << index));
1049 channel = (u_short) (save_xir & CyIRChannel);
1050 i = channel + chip * 4 + cinfo->first_line;
1051 info = &cy_port[i];
1052 info->last_active = jiffies;
1053 save_car = readb(base_addr + (CyCAR << index));
1054 cy_writeb(base_addr + (CyCAR << index), save_xir);
1055
1056 /* if there is nowhere to put the data, discard it */
1057 if (info->tty == 0) {
1058 j = (readb(base_addr + (CyRIVR << index)) &
1059 CyIVRMask);
1060 if (j == CyIVRRxEx) { /* exception */
1061 data = readb(base_addr + (CyRDSR << index));
1062 } else { /* normal character reception */
1063 char_count = readb(base_addr +
1064 (CyRDCR << index));
1065 while (char_count--) {
1066 data = readb(base_addr +
1067 (CyRDSR << index));
1068 }
1069 }
1070 } else { /* there is an open port for this data */
1071 tty = info->tty;
1072 j = (readb(base_addr + (CyRIVR << index)) &
1073 CyIVRMask);
1074 if (j == CyIVRRxEx) { /* exception */
1075 data = readb(base_addr + (CyRDSR << index));
1076
1077 /* For statistics only */
1078 if (data & CyBREAK)
1079 info->icount.brk++;
1080 else if (data & CyFRAME)
1081 info->icount.frame++;
1082 else if (data & CyPARITY)
1083 info->icount.parity++;
1084 else if (data & CyOVERRUN)
1085 info->icount.overrun++;
1086
1087 if (data & info->ignore_status_mask) {
1088 info->icount.rx++;
1089 return;
1090 }
1091 if (tty_buffer_request_room(tty, 1)) {
1092 if (data & info->read_status_mask) {
1093 if (data & CyBREAK) {
1094 tty_insert_flip_char(
1095 tty,
1096 readb(
1097 base_addr +
1098 (CyRDSR <<
1099 index)),
1100 TTY_BREAK);
1101 info->icount.rx++;
1102 if (info->flags &
1103 ASYNC_SAK) {
1104 do_SAK(tty);
1105 }
1106 } else if (data & CyFRAME) {
1107 tty_insert_flip_char(
1108 tty,
1109 readb(
1110 base_addr +
1111 (CyRDSR <<
1112 index)),
1113 TTY_FRAME);
1114 info->icount.rx++;
1115 info->idle_stats.
1116 frame_errs++;
1117 } else if (data & CyPARITY) {
1118 /* Pieces of seven... */
1119 tty_insert_flip_char(
1120 tty,
1121 readb(
1122 base_addr +
1123 (CyRDSR <<
1124 index)),
1125 TTY_PARITY);
1126 info->icount.rx++;
1127 info->idle_stats.
1128 parity_errs++;
1129 } else if (data & CyOVERRUN) {
1130 tty_insert_flip_char(
1131 tty, 0,
1132 TTY_OVERRUN);
1133 info->icount.rx++;
1134 /* If the flip buffer itself is
1135 overflowing, we still lose
1136 the next incoming character.
1137 */
1138 tty_insert_flip_char(
1139 tty,
1140 readb(
1141 base_addr +
1142 (CyRDSR <<
1143 index)),
1144 TTY_FRAME);
1145 info->icount.rx++;
1146 info->idle_stats.
1147 overruns++;
1148 /* These two conditions may imply */
1149 /* a normal read should be done. */
1150 /* }else if(data & CyTIMEOUT){ */
1151 /* }else if(data & CySPECHAR){ */
1152 } else {
1153 tty_insert_flip_char(
1154 tty, 0,
1155 TTY_NORMAL);
1156 info->icount.rx++;
1157 }
1158 } else {
1159 tty_insert_flip_char(tty, 0,
1160 TTY_NORMAL);
1161 info->icount.rx++;
1162 }
1163 } else {
1164 /* there was a software buffer
1165 overrun and nothing could be
1166 done about it!!! */
1167 info->icount.buf_overrun++;
1168 info->idle_stats.overruns++;
1169 }
1170 } else { /* normal character reception */
1171 /* load # chars available from the chip */
1172 char_count = readb(base_addr +
1173 (CyRDCR << index));
1174
1175 #ifdef CY_ENABLE_MONITORING
1176 ++info->mon.int_count;
1177 info->mon.char_count += char_count;
1178 if (char_count > info->mon.char_max)
1179 info->mon.char_max = char_count;
1180 info->mon.char_last = char_count;
1181 #endif
1182 len = tty_buffer_request_room(tty, char_count);
1183 while (len--) {
1184 data = readb(base_addr +
1185 (CyRDSR << index));
1186 tty_insert_flip_char(tty, data,
1187 TTY_NORMAL);
1188 info->idle_stats.recv_bytes++;
1189 info->icount.rx++;
1190 #ifdef CY_16Y_HACK
1191 udelay(10L);
1192 #endif
1193 }
1194 info->idle_stats.recv_idle = jiffies;
1195 }
1196 tty_schedule_flip(tty);
1197 }
1198 /* end of service */
1199 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1200 cy_writeb(base_addr + (CyCAR << index), (save_car));
1201 spin_unlock(&cinfo->card_lock);
1202 }
1203
1204 if (status & CySRTransmit) { /* transmission interrupt */
1205 /* Since we only get here when the transmit buffer
1206 is empty, we know we can always stuff a dozen
1207 characters. */
1208 #ifdef CY_DEBUG_INTERRUPTS
1209 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1210 #endif
1211
1212 /* determine the channel & change to that context */
1213 spin_lock(&cinfo->card_lock);
1214 save_xir = (u_char) readb(base_addr + (CyTIR << index));
1215 channel = (u_short) (save_xir & CyIRChannel);
1216 i = channel + chip * 4 + cinfo->first_line;
1217 save_car = readb(base_addr + (CyCAR << index));
1218 cy_writeb(base_addr + (CyCAR << index), save_xir);
1219
1220 /* validate the port# (as configured and open) */
1221 if ((i < 0) || (NR_PORTS <= i)) {
1222 cy_writeb(base_addr + (CySRER << index),
1223 readb(base_addr + (CySRER << index)) &
1224 ~CyTxRdy);
1225 goto txend;
1226 }
1227 info = &cy_port[i];
1228 info->last_active = jiffies;
1229 if (info->tty == 0) {
1230 cy_writeb(base_addr + (CySRER << index),
1231 readb(base_addr + (CySRER << index)) &
1232 ~CyTxRdy);
1233 goto txdone;
1234 }
1235
1236 /* load the on-chip space for outbound data */
1237 char_count = info->xmit_fifo_size;
1238
1239 if (info->x_char) { /* send special char */
1240 outch = info->x_char;
1241 cy_writeb(base_addr + (CyTDR << index), outch);
1242 char_count--;
1243 info->icount.tx++;
1244 info->x_char = 0;
1245 }
1246
1247 if (info->breakon || info->breakoff) {
1248 if (info->breakon) {
1249 cy_writeb(base_addr + (CyTDR << index), 0);
1250 cy_writeb(base_addr + (CyTDR << index), 0x81);
1251 info->breakon = 0;
1252 char_count -= 2;
1253 }
1254 if (info->breakoff) {
1255 cy_writeb(base_addr + (CyTDR << index), 0);
1256 cy_writeb(base_addr + (CyTDR << index), 0x83);
1257 info->breakoff = 0;
1258 char_count -= 2;
1259 }
1260 }
1261
1262 while (char_count-- > 0) {
1263 if (!info->xmit_cnt) {
1264 if (readb(base_addr + (CySRER << index)) &
1265 CyTxMpty) {
1266 cy_writeb(base_addr + (CySRER << index),
1267 readb(base_addr +
1268 (CySRER << index)) &
1269 ~CyTxMpty);
1270 } else {
1271 cy_writeb(base_addr + (CySRER << index),
1272 (readb(base_addr +
1273 (CySRER << index)) &
1274 ~CyTxRdy) | CyTxMpty);
1275 }
1276 goto txdone;
1277 }
1278 if (info->xmit_buf == 0) {
1279 cy_writeb(base_addr + (CySRER << index),
1280 readb(base_addr + (CySRER << index)) &
1281 ~CyTxRdy);
1282 goto txdone;
1283 }
1284 if (info->tty->stopped || info->tty->hw_stopped) {
1285 cy_writeb(base_addr + (CySRER << index),
1286 readb(base_addr + (CySRER << index)) &
1287 ~CyTxRdy);
1288 goto txdone;
1289 }
1290 /* Because the Embedded Transmit Commands have
1291 been enabled, we must check to see if the
1292 escape character, NULL, is being sent. If it
1293 is, we must ensure that there is room for it
1294 to be doubled in the output stream. Therefore
1295 we no longer advance the pointer when the
1296 character is fetched, but rather wait until
1297 after the check for a NULL output character.
1298 This is necessary because there may not be
1299 room for the two chars needed to send a NULL.)
1300 */
1301 outch = info->xmit_buf[info->xmit_tail];
1302 if (outch) {
1303 info->xmit_cnt--;
1304 info->xmit_tail = (info->xmit_tail + 1) &
1305 (SERIAL_XMIT_SIZE - 1);
1306 cy_writeb(base_addr + (CyTDR << index), outch);
1307 info->icount.tx++;
1308 } else {
1309 if (char_count > 1) {
1310 info->xmit_cnt--;
1311 info->xmit_tail = (info->xmit_tail + 1)&
1312 (SERIAL_XMIT_SIZE - 1);
1313 cy_writeb(base_addr + (CyTDR << index),
1314 outch);
1315 cy_writeb(base_addr + (CyTDR << index),
1316 0);
1317 info->icount.tx++;
1318 char_count--;
1319 } else {
1320 }
1321 }
1322 }
1323
1324 txdone:
1325 if (info->xmit_cnt < WAKEUP_CHARS) {
1326 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1327 }
1328 txend:
1329 /* end of service */
1330 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1331 cy_writeb(base_addr + (CyCAR << index), (save_car));
1332 spin_unlock(&cinfo->card_lock);
1333 }
1334
1335 if (status & CySRModem) { /* modem interrupt */
1336
1337 /* determine the channel & change to that context */
1338 spin_lock(&cinfo->card_lock);
1339 save_xir = (u_char) readb(base_addr + (CyMIR << index));
1340 channel = (u_short) (save_xir & CyIRChannel);
1341 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1342 info->last_active = jiffies;
1343 save_car = readb(base_addr + (CyCAR << index));
1344 cy_writeb(base_addr + (CyCAR << index), save_xir);
1345
1346 mdm_change = readb(base_addr + (CyMISR << index));
1347 mdm_status = readb(base_addr + (CyMSVR1 << index));
1348
1349 if (info->tty == 0) { /* no place for data, ignore it */
1350 ;
1351 } else {
1352 if (mdm_change & CyANY_DELTA) {
1353 /* For statistics only */
1354 if (mdm_change & CyDCD)
1355 info->icount.dcd++;
1356 if (mdm_change & CyCTS)
1357 info->icount.cts++;
1358 if (mdm_change & CyDSR)
1359 info->icount.dsr++;
1360 if (mdm_change & CyRI)
1361 info->icount.rng++;
1362
1363 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1364 }
1365
1366 if ((mdm_change & CyDCD) &&
1367 (info->flags & ASYNC_CHECK_CD)) {
1368 if (mdm_status & CyDCD) {
1369 cy_sched_event(info,
1370 Cy_EVENT_OPEN_WAKEUP);
1371 } else {
1372 cy_sched_event(info, Cy_EVENT_HANGUP);
1373 }
1374 }
1375 if ((mdm_change & CyCTS) &&
1376 (info->flags & ASYNC_CTS_FLOW)) {
1377 if (info->tty->hw_stopped) {
1378 if (mdm_status & CyCTS) {
1379 /* cy_start isn't used
1380 because... !!! */
1381 info->tty->hw_stopped = 0;
1382 cy_writeb(base_addr +
1383 (CySRER << index),
1384 readb(base_addr +
1385 (CySRER <<
1386 index))|
1387 CyTxRdy);
1388 cy_sched_event(info,
1389 Cy_EVENT_WRITE_WAKEUP);
1390 }
1391 } else {
1392 if (!(mdm_status & CyCTS)) {
1393 /* cy_stop isn't used
1394 because ... !!! */
1395 info->tty->hw_stopped = 1;
1396 cy_writeb(base_addr +
1397 (CySRER << index),
1398 readb(base_addr +
1399 (CySRER <<
1400 index)) &
1401 ~CyTxRdy);
1402 }
1403 }
1404 }
1405 if (mdm_change & CyDSR) {
1406 }
1407 if (mdm_change & CyRI) {
1408 }
1409 }
1410 /* end of service */
1411 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1412 cy_writeb(base_addr + (CyCAR << index), save_car);
1413 spin_unlock(&cinfo->card_lock);
1414 }
1415 }
1416
1417 /* The real interrupt service routine is called
1418 whenever the card wants its hand held--chars
1419 received, out buffer empty, modem change, etc.
1420 */
1421 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1422 {
1423 int status;
1424 struct cyclades_card *cinfo;
1425 void __iomem *base_addr, *card_base_addr;
1426 int chip;
1427 int index;
1428 int too_many;
1429 int had_work;
1430
1431 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1432 #ifdef CY_DEBUG_INTERRUPTS
1433 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1434 #endif
1435 return IRQ_NONE; /* spurious interrupt */
1436 }
1437
1438 card_base_addr = cinfo->base_addr;
1439 index = cinfo->bus_index;
1440
1441 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1442 if (unlikely(card_base_addr == NULL))
1443 return IRQ_HANDLED;
1444
1445 /* This loop checks all chips in the card. Make a note whenever
1446 _any_ chip had some work to do, as this is considered an
1447 indication that there will be more to do. Only when no chip
1448 has any work does this outermost loop exit.
1449 */
1450 do {
1451 had_work = 0;
1452 for (chip = 0; chip < cinfo->num_chips; chip++) {
1453 base_addr = cinfo->base_addr +
1454 (cy_chip_offset[chip] << index);
1455 too_many = 0;
1456 while ((status = readb(base_addr +
1457 (CySVRR << index))) != 0x00) {
1458 had_work++;
1459 /* The purpose of the following test is to ensure that
1460 no chip can monopolize the driver. This forces the
1461 chips to be checked in a round-robin fashion (after
1462 draining each of a bunch (1000) of characters).
1463 */
1464 if (1000 < too_many++) {
1465 break;
1466 }
1467 cyy_intr_chip(cinfo, chip, base_addr, status,
1468 index);
1469 }
1470 }
1471 } while (had_work);
1472
1473 /* clear interrupts */
1474 spin_lock(&cinfo->card_lock);
1475 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1476 /* Cy_ClrIntr is 0x1800 */
1477 spin_unlock(&cinfo->card_lock);
1478 return IRQ_HANDLED;
1479 } /* cyy_interrupt */
1480
1481 /***********************************************************/
1482 /********* End of block of Cyclom-Y specific code **********/
1483 /******** Start of block of Cyclades-Z specific code *********/
1484 /***********************************************************/
1485
1486 static int
1487 cyz_fetch_msg(struct cyclades_card *cinfo,
1488 __u32 * channel, __u8 * cmd, __u32 * param)
1489 {
1490 struct FIRM_ID __iomem *firm_id;
1491 struct ZFW_CTRL __iomem *zfw_ctrl;
1492 struct BOARD_CTRL __iomem *board_ctrl;
1493 unsigned long loc_doorbell;
1494
1495 firm_id = cinfo->base_addr + ID_ADDRESS;
1496 if (!ISZLOADED(*cinfo)) {
1497 return -1;
1498 }
1499 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1500 board_ctrl = &zfw_ctrl->board_ctrl;
1501
1502 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1503 (cinfo->ctl_addr))->loc_doorbell);
1504 if (loc_doorbell) {
1505 *cmd = (char)(0xff & loc_doorbell);
1506 *channel = readl(&board_ctrl->fwcmd_channel);
1507 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1508 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1509 loc_doorbell, 0xffffffff);
1510 return 1;
1511 }
1512 return 0;
1513 } /* cyz_fetch_msg */
1514
1515 static int
1516 cyz_issue_cmd(struct cyclades_card *cinfo,
1517 __u32 channel, __u8 cmd, __u32 param)
1518 {
1519 struct FIRM_ID __iomem *firm_id;
1520 struct ZFW_CTRL __iomem *zfw_ctrl;
1521 struct BOARD_CTRL __iomem *board_ctrl;
1522 __u32 __iomem *pci_doorbell;
1523 int index;
1524
1525 firm_id = cinfo->base_addr + ID_ADDRESS;
1526 if (!ISZLOADED(*cinfo)) {
1527 return -1;
1528 }
1529 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1530 board_ctrl = &zfw_ctrl->board_ctrl;
1531
1532 index = 0;
1533 pci_doorbell =
1534 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1535 while ((readl(pci_doorbell) & 0xff) != 0) {
1536 if (index++ == 1000) {
1537 return (int)(readl(pci_doorbell) & 0xff);
1538 }
1539 udelay(50L);
1540 }
1541 cy_writel(&board_ctrl->hcmd_channel, channel);
1542 cy_writel(&board_ctrl->hcmd_param, param);
1543 cy_writel(pci_doorbell, (long)cmd);
1544
1545 return 0;
1546 } /* cyz_issue_cmd */
1547
1548 static void
1549 cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1550 struct BUF_CTRL __iomem *buf_ctrl)
1551 {
1552 struct cyclades_card *cinfo = info->card;
1553 struct tty_struct *tty = info->tty;
1554 int char_count;
1555 int len;
1556 #ifdef BLOCKMOVE
1557 unsigned char *buf;
1558 #else
1559 char data;
1560 #endif
1561 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1562
1563 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1564 rx_put = readl(&buf_ctrl->rx_put);
1565 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1566 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1567 if (rx_put >= rx_get)
1568 char_count = rx_put - rx_get;
1569 else
1570 char_count = rx_put - rx_get + rx_bufsize;
1571
1572 if (char_count) {
1573 info->last_active = jiffies;
1574 info->jiffies[1] = jiffies;
1575
1576 #ifdef CY_ENABLE_MONITORING
1577 info->mon.int_count++;
1578 info->mon.char_count += char_count;
1579 if (char_count > info->mon.char_max)
1580 info->mon.char_max = char_count;
1581 info->mon.char_last = char_count;
1582 #endif
1583 if (tty == 0) {
1584 /* flush received characters */
1585 new_rx_get = (new_rx_get + char_count) &
1586 (rx_bufsize - 1);
1587 info->rflush_count++;
1588 } else {
1589 #ifdef BLOCKMOVE
1590 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1591 for performance, but because of buffer boundaries, there
1592 may be several steps to the operation */
1593 while (1) {
1594 len = tty_prepare_flip_string(tty, &buf,
1595 char_count);
1596 if (!len)
1597 break;
1598
1599 len = min_t(unsigned int, min(len, char_count),
1600 rx_bufsize - new_rx_get);
1601
1602 memcpy_fromio(buf, cinfo->base_addr +
1603 rx_bufaddr + new_rx_get, len);
1604
1605 new_rx_get = (new_rx_get + len) &
1606 (rx_bufsize - 1);
1607 char_count -= len;
1608 info->icount.rx += len;
1609 info->idle_stats.recv_bytes += len;
1610 }
1611 #else
1612 len = tty_buffer_request_room(tty, char_count);
1613 while (len--) {
1614 data = readb(cinfo->base_addr + rx_bufaddr +
1615 new_rx_get);
1616 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1617 tty_insert_flip_char(tty, data, TTY_NORMAL);
1618 info->idle_stats.recv_bytes++;
1619 info->icount.rx++;
1620 }
1621 #endif
1622 #ifdef CONFIG_CYZ_INTR
1623 /* Recalculate the number of chars in the RX buffer and issue
1624 a cmd in case it's higher than the RX high water mark */
1625 rx_put = readl(&buf_ctrl->rx_put);
1626 if (rx_put >= rx_get)
1627 char_count = rx_put - rx_get;
1628 else
1629 char_count = rx_put - rx_get + rx_bufsize;
1630 if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
1631 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1632 }
1633 #endif
1634 info->idle_stats.recv_idle = jiffies;
1635 tty_schedule_flip(tty);
1636 }
1637 /* Update rx_get */
1638 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1639 }
1640 }
1641
1642 static void
1643 cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1644 struct BUF_CTRL __iomem *buf_ctrl)
1645 {
1646 struct cyclades_card *cinfo = info->card;
1647 struct tty_struct *tty = info->tty;
1648 char data;
1649 int char_count;
1650 #ifdef BLOCKMOVE
1651 int small_count;
1652 #endif
1653 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1654
1655 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1656 return;
1657
1658 tx_get = readl(&buf_ctrl->tx_get);
1659 tx_put = readl(&buf_ctrl->tx_put);
1660 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1661 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1662 if (tx_put >= tx_get)
1663 char_count = tx_get - tx_put - 1 + tx_bufsize;
1664 else
1665 char_count = tx_get - tx_put - 1;
1666
1667 if (char_count) {
1668
1669 if (tty == 0) {
1670 goto ztxdone;
1671 }
1672
1673 if (info->x_char) { /* send special char */
1674 data = info->x_char;
1675
1676 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1677 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1678 info->x_char = 0;
1679 char_count--;
1680 info->icount.tx++;
1681 info->last_active = jiffies;
1682 info->jiffies[2] = jiffies;
1683 }
1684 #ifdef BLOCKMOVE
1685 while (0 < (small_count = min_t(unsigned int,
1686 tx_bufsize - tx_put, min_t(unsigned int,
1687 (SERIAL_XMIT_SIZE - info->xmit_tail),
1688 min_t(unsigned int, info->xmit_cnt,
1689 char_count))))) {
1690
1691 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1692 tx_put),
1693 &info->xmit_buf[info->xmit_tail],
1694 small_count);
1695
1696 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1697 char_count -= small_count;
1698 info->icount.tx += small_count;
1699 info->xmit_cnt -= small_count;
1700 info->xmit_tail = (info->xmit_tail + small_count) &
1701 (SERIAL_XMIT_SIZE - 1);
1702 info->last_active = jiffies;
1703 info->jiffies[2] = jiffies;
1704 }
1705 #else
1706 while (info->xmit_cnt && char_count) {
1707 data = info->xmit_buf[info->xmit_tail];
1708 info->xmit_cnt--;
1709 info->xmit_tail = (info->xmit_tail + 1) &
1710 (SERIAL_XMIT_SIZE - 1);
1711
1712 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1713 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1714 char_count--;
1715 info->icount.tx++;
1716 info->last_active = jiffies;
1717 info->jiffies[2] = jiffies;
1718 }
1719 #endif
1720 ztxdone:
1721 if (info->xmit_cnt < WAKEUP_CHARS) {
1722 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1723 }
1724 /* Update tx_put */
1725 cy_writel(&buf_ctrl->tx_put, tx_put);
1726 }
1727 }
1728
1729 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1730 {
1731 struct tty_struct *tty;
1732 struct cyclades_port *info;
1733 static struct FIRM_ID __iomem *firm_id;
1734 static struct ZFW_CTRL __iomem *zfw_ctrl;
1735 static struct BOARD_CTRL __iomem *board_ctrl;
1736 static struct CH_CTRL __iomem *ch_ctrl;
1737 static struct BUF_CTRL __iomem *buf_ctrl;
1738 __u32 channel;
1739 __u8 cmd;
1740 __u32 param;
1741 __u32 hw_ver, fw_ver;
1742 int special_count;
1743 int delta_count;
1744
1745 firm_id = cinfo->base_addr + ID_ADDRESS;
1746 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1747 board_ctrl = &zfw_ctrl->board_ctrl;
1748 fw_ver = readl(&board_ctrl->fw_version);
1749 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1750 mail_box_0);
1751
1752 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1753 special_count = 0;
1754 delta_count = 0;
1755 info = &cy_port[channel + cinfo->first_line];
1756 if ((tty = info->tty) == 0) {
1757 continue;
1758 }
1759 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1760 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1761
1762 switch (cmd) {
1763 case C_CM_PR_ERROR:
1764 tty_insert_flip_char(tty, 0, TTY_PARITY);
1765 info->icount.rx++;
1766 special_count++;
1767 break;
1768 case C_CM_FR_ERROR:
1769 tty_insert_flip_char(tty, 0, TTY_FRAME);
1770 info->icount.rx++;
1771 special_count++;
1772 break;
1773 case C_CM_RXBRK:
1774 tty_insert_flip_char(tty, 0, TTY_BREAK);
1775 info->icount.rx++;
1776 special_count++;
1777 break;
1778 case C_CM_MDCD:
1779 info->icount.dcd++;
1780 delta_count++;
1781 if (info->flags & ASYNC_CHECK_CD) {
1782 if ((fw_ver > 241 ? ((u_long) param) :
1783 readl(&ch_ctrl->rs_status)) &
1784 C_RS_DCD) {
1785 cy_sched_event(info,
1786 Cy_EVENT_OPEN_WAKEUP);
1787 } else {
1788 cy_sched_event(info, Cy_EVENT_HANGUP);
1789 }
1790 }
1791 break;
1792 case C_CM_MCTS:
1793 info->icount.cts++;
1794 delta_count++;
1795 break;
1796 case C_CM_MRI:
1797 info->icount.rng++;
1798 delta_count++;
1799 break;
1800 case C_CM_MDSR:
1801 info->icount.dsr++;
1802 delta_count++;
1803 break;
1804 #ifdef Z_WAKE
1805 case C_CM_IOCTLW:
1806 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1807 break;
1808 #endif
1809 #ifdef CONFIG_CYZ_INTR
1810 case C_CM_RXHIWM:
1811 case C_CM_RXNNDT:
1812 case C_CM_INTBACK2:
1813 /* Reception Interrupt */
1814 #ifdef CY_DEBUG_INTERRUPTS
1815 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1816 "port %ld\n", info->card, channel);
1817 #endif
1818 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1819 break;
1820 case C_CM_TXBEMPTY:
1821 case C_CM_TXLOWWM:
1822 case C_CM_INTBACK:
1823 /* Transmission Interrupt */
1824 #ifdef CY_DEBUG_INTERRUPTS
1825 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1826 "port %ld\n", info->card, channel);
1827 #endif
1828 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1829 break;
1830 #endif /* CONFIG_CYZ_INTR */
1831 case C_CM_FATAL:
1832 /* should do something with this !!! */
1833 break;
1834 default:
1835 break;
1836 }
1837 if (delta_count)
1838 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1839 if (special_count)
1840 tty_schedule_flip(tty);
1841 }
1842 }
1843
1844 #ifdef CONFIG_CYZ_INTR
1845 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1846 {
1847 struct cyclades_card *cinfo;
1848
1849 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1850 #ifdef CY_DEBUG_INTERRUPTS
1851 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1852 #endif
1853 return IRQ_NONE; /* spurious interrupt */
1854 }
1855
1856 if (!ISZLOADED(*cinfo)) {
1857 #ifdef CY_DEBUG_INTERRUPTS
1858 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1859 "(IRQ%d).\n", irq);
1860 #endif
1861 return IRQ_NONE;
1862 }
1863
1864 /* Handle the interrupts */
1865 cyz_handle_cmd(cinfo);
1866
1867 return IRQ_HANDLED;
1868 } /* cyz_interrupt */
1869
1870 static void cyz_rx_restart(unsigned long arg)
1871 {
1872 struct cyclades_port *info = (struct cyclades_port *)arg;
1873 struct cyclades_card *card = info->card;
1874 int retval;
1875 __u32 channel = info->line - card->first_line;
1876 unsigned long flags;
1877
1878 CY_LOCK(info, flags);
1879 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1880 if (retval != 0) {
1881 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1882 info->line, retval);
1883 }
1884 CY_UNLOCK(info, flags);
1885 }
1886
1887 #else /* CONFIG_CYZ_INTR */
1888
1889 static void cyz_poll(unsigned long arg)
1890 {
1891 struct cyclades_card *cinfo;
1892 struct cyclades_port *info;
1893 struct tty_struct *tty;
1894 static struct FIRM_ID *firm_id;
1895 static struct ZFW_CTRL *zfw_ctrl;
1896 static struct BOARD_CTRL *board_ctrl;
1897 static struct CH_CTRL *ch_ctrl;
1898 static struct BUF_CTRL *buf_ctrl;
1899 unsigned long expires = jiffies + HZ;
1900 int card, port;
1901
1902 for (card = 0; card < NR_CARDS; card++) {
1903 cinfo = &cy_card[card];
1904
1905 if (!IS_CYC_Z(*cinfo))
1906 continue;
1907 if (!ISZLOADED(*cinfo))
1908 continue;
1909
1910 firm_id = cinfo->base_addr + ID_ADDRESS;
1911 zfw_ctrl = cinfo->base_addr +
1912 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1913 board_ctrl = &(zfw_ctrl->board_ctrl);
1914
1915 /* Skip first polling cycle to avoid racing conditions with the FW */
1916 if (!cinfo->intr_enabled) {
1917 cinfo->nports = (int)readl(&board_ctrl->n_channel);
1918 cinfo->intr_enabled = 1;
1919 continue;
1920 }
1921
1922 cyz_handle_cmd(cinfo);
1923
1924 for (port = 0; port < cinfo->nports; port++) {
1925 info = &cy_port[port + cinfo->first_line];
1926 tty = info->tty;
1927 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1928 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1929
1930 if (!info->throttle)
1931 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1932 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1933 }
1934 /* poll every 'cyz_polling_cycle' period */
1935 expires = jiffies + cyz_polling_cycle;
1936 }
1937 mod_timer(&cyz_timerlist, expires);
1938 } /* cyz_poll */
1939
1940 #endif /* CONFIG_CYZ_INTR */
1941
1942 /********** End of block of Cyclades-Z specific code *********/
1943 /***********************************************************/
1944
1945 /* This is called whenever a port becomes active;
1946 interrupts are enabled and DTR & RTS are turned on.
1947 */
1948 static int startup(struct cyclades_port *info)
1949 {
1950 struct cyclades_card *card;
1951 unsigned long flags;
1952 int retval = 0;
1953 void __iomem *base_addr;
1954 int chip, channel, index;
1955 unsigned long page;
1956
1957 card = info->card;
1958 channel = info->line - card->first_line;
1959
1960 page = get_zeroed_page(GFP_KERNEL);
1961 if (!page)
1962 return -ENOMEM;
1963
1964 CY_LOCK(info, flags);
1965
1966 if (info->flags & ASYNC_INITIALIZED) {
1967 free_page(page);
1968 goto errout;
1969 }
1970
1971 if (!info->type) {
1972 if (info->tty) {
1973 set_bit(TTY_IO_ERROR, &info->tty->flags);
1974 }
1975 free_page(page);
1976 goto errout;
1977 }
1978
1979 if (info->xmit_buf)
1980 free_page(page);
1981 else
1982 info->xmit_buf = (unsigned char *)page;
1983
1984 CY_UNLOCK(info, flags);
1985
1986 set_line_char(info);
1987
1988 if (!IS_CYC_Z(*card)) {
1989 chip = channel >> 2;
1990 channel &= 0x03;
1991 index = card->bus_index;
1992 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1993
1994 #ifdef CY_DEBUG_OPEN
1995 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1996 "base_addr %p\n",
1997 card, chip, channel, base_addr);
1998 #endif
1999 CY_LOCK(info, flags);
2000
2001 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2002
2003 cy_writeb(base_addr + (CyRTPR << index),
2004 (info->default_timeout ? info->default_timeout : 0x02));
2005 /* 10ms rx timeout */
2006
2007 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2008 index);
2009
2010 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2011 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2012 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
2013
2014 #ifdef CY_DEBUG_DTR
2015 printk(KERN_DEBUG "cyc:startup raising DTR\n");
2016 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2017 readb(base_addr + (CyMSVR1 << index)),
2018 readb(base_addr + (CyMSVR2 << index)));
2019 #endif
2020
2021 cy_writeb(base_addr + (CySRER << index),
2022 readb(base_addr + (CySRER << index)) | CyRxData);
2023 info->flags |= ASYNC_INITIALIZED;
2024
2025 if (info->tty) {
2026 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2027 }
2028 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2029 info->breakon = info->breakoff = 0;
2030 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2031 info->idle_stats.in_use =
2032 info->idle_stats.recv_idle =
2033 info->idle_stats.xmit_idle = jiffies;
2034
2035 CY_UNLOCK(info, flags);
2036
2037 } else {
2038 struct FIRM_ID __iomem *firm_id;
2039 struct ZFW_CTRL __iomem *zfw_ctrl;
2040 struct BOARD_CTRL __iomem *board_ctrl;
2041 struct CH_CTRL __iomem *ch_ctrl;
2042 int retval;
2043
2044 base_addr = card->base_addr;
2045
2046 firm_id = base_addr + ID_ADDRESS;
2047 if (!ISZLOADED(*card)) {
2048 return -ENODEV;
2049 }
2050
2051 zfw_ctrl = card->base_addr +
2052 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2053 board_ctrl = &zfw_ctrl->board_ctrl;
2054 ch_ctrl = zfw_ctrl->ch_ctrl;
2055
2056 #ifdef CY_DEBUG_OPEN
2057 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
2058 "base_addr %p\n", card, channel, base_addr);
2059 #endif
2060 CY_LOCK(info, flags);
2061
2062 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2063 #ifdef Z_WAKE
2064 #ifdef CONFIG_CYZ_INTR
2065 cy_writel(&ch_ctrl[channel].intr_enable,
2066 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2067 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2068 #else
2069 cy_writel(&ch_ctrl[channel].intr_enable,
2070 C_IN_IOCTLW | C_IN_MDCD);
2071 #endif /* CONFIG_CYZ_INTR */
2072 #else
2073 #ifdef CONFIG_CYZ_INTR
2074 cy_writel(&ch_ctrl[channel].intr_enable,
2075 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2076 C_IN_RXNNDT | C_IN_MDCD);
2077 #else
2078 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2079 #endif /* CONFIG_CYZ_INTR */
2080 #endif /* Z_WAKE */
2081
2082 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2083 if (retval != 0) {
2084 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
2085 "%x\n", info->line, retval);
2086 }
2087
2088 /* Flush RX buffers before raising DTR and RTS */
2089 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
2090 if (retval != 0) {
2091 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
2092 "%x\n", info->line, retval);
2093 }
2094
2095 /* set timeout !!! */
2096 /* set RTS and DTR !!! */
2097 cy_writel(&ch_ctrl[channel].rs_control,
2098 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2099 C_RS_DTR);
2100 retval = cyz_issue_cmd(info->card, channel,
2101 C_CM_IOCTLM, 0L);
2102 if (retval != 0) {
2103 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
2104 "%x\n", info->line, retval);
2105 }
2106 #ifdef CY_DEBUG_DTR
2107 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
2108 #endif
2109
2110 /* enable send, recv, modem !!! */
2111
2112 info->flags |= ASYNC_INITIALIZED;
2113 if (info->tty) {
2114 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2115 }
2116 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2117 info->breakon = info->breakoff = 0;
2118 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2119 info->idle_stats.in_use =
2120 info->idle_stats.recv_idle =
2121 info->idle_stats.xmit_idle = jiffies;
2122
2123 CY_UNLOCK(info, flags);
2124 }
2125
2126 #ifdef CY_DEBUG_OPEN
2127 printk(KERN_DEBUG "cyc startup done\n");
2128 #endif
2129 return 0;
2130
2131 errout:
2132 CY_UNLOCK(info, flags);
2133 return retval;
2134 } /* startup */
2135
2136 static void start_xmit(struct cyclades_port *info)
2137 {
2138 struct cyclades_card *card;
2139 unsigned long flags;
2140 void __iomem *base_addr;
2141 int chip, channel, index;
2142
2143 card = info->card;
2144 channel = info->line - card->first_line;
2145 if (!IS_CYC_Z(*card)) {
2146 chip = channel >> 2;
2147 channel &= 0x03;
2148 index = card->bus_index;
2149 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2150
2151 CY_LOCK(info, flags);
2152 cy_writeb(base_addr + (CyCAR << index), channel);
2153 cy_writeb(base_addr + (CySRER << index),
2154 readb(base_addr + (CySRER << index)) | CyTxRdy);
2155 CY_UNLOCK(info, flags);
2156 } else {
2157 #ifdef CONFIG_CYZ_INTR
2158 int retval;
2159
2160 CY_LOCK(info, flags);
2161 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2162 if (retval != 0) {
2163 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2164 "%x\n", info->line, retval);
2165 }
2166 CY_UNLOCK(info, flags);
2167 #else /* CONFIG_CYZ_INTR */
2168 /* Don't have to do anything at this time */
2169 #endif /* CONFIG_CYZ_INTR */
2170 }
2171 } /* start_xmit */
2172
2173 /*
2174 * This routine shuts down a serial port; interrupts are disabled,
2175 * and DTR is dropped if the hangup on close termio flag is on.
2176 */
2177 static void shutdown(struct cyclades_port *info)
2178 {
2179 struct cyclades_card *card;
2180 unsigned long flags;
2181 void __iomem *base_addr;
2182 int chip, channel, index;
2183
2184 if (!(info->flags & ASYNC_INITIALIZED)) {
2185 return;
2186 }
2187
2188 card = info->card;
2189 channel = info->line - card->first_line;
2190 if (!IS_CYC_Z(*card)) {
2191 chip = channel >> 2;
2192 channel &= 0x03;
2193 index = card->bus_index;
2194 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2195
2196 #ifdef CY_DEBUG_OPEN
2197 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2198 "channel %d, base_addr %p\n",
2199 card, chip, channel, base_addr);
2200 #endif
2201
2202 CY_LOCK(info, flags);
2203
2204 /* Clear delta_msr_wait queue to avoid mem leaks. */
2205 wake_up_interruptible(&info->delta_msr_wait);
2206
2207 if (info->xmit_buf) {
2208 unsigned char *temp;
2209 temp = info->xmit_buf;
2210 info->xmit_buf = NULL;
2211 free_page((unsigned long)temp);
2212 }
2213 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2214 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2215 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2216 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2217 #ifdef CY_DEBUG_DTR
2218 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2219 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2220 readb(base_addr + (CyMSVR1 << index)),
2221 readb(base_addr + (CyMSVR2 << index)));
2222 #endif
2223 }
2224 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2225 /* it may be appropriate to clear _XMIT at
2226 some later date (after testing)!!! */
2227
2228 if (info->tty) {
2229 set_bit(TTY_IO_ERROR, &info->tty->flags);
2230 }
2231 info->flags &= ~ASYNC_INITIALIZED;
2232 CY_UNLOCK(info, flags);
2233 } else {
2234 struct FIRM_ID __iomem *firm_id;
2235 struct ZFW_CTRL __iomem *zfw_ctrl;
2236 struct BOARD_CTRL __iomem *board_ctrl;
2237 struct CH_CTRL __iomem *ch_ctrl;
2238 int retval;
2239
2240 base_addr = card->base_addr;
2241 #ifdef CY_DEBUG_OPEN
2242 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2243 "base_addr %p\n", card, channel, base_addr);
2244 #endif
2245
2246 firm_id = base_addr + ID_ADDRESS;
2247 if (!ISZLOADED(*card)) {
2248 return;
2249 }
2250
2251 zfw_ctrl = card->base_addr +
2252 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2253 board_ctrl = &zfw_ctrl->board_ctrl;
2254 ch_ctrl = zfw_ctrl->ch_ctrl;
2255
2256 CY_LOCK(info, flags);
2257
2258 if (info->xmit_buf) {
2259 unsigned char *temp;
2260 temp = info->xmit_buf;
2261 info->xmit_buf = NULL;
2262 free_page((unsigned long)temp);
2263 }
2264
2265 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2266 cy_writel(&ch_ctrl[channel].rs_control,
2267 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2268 ~(C_RS_RTS | C_RS_DTR)));
2269 retval = cyz_issue_cmd(info->card, channel,
2270 C_CM_IOCTLM, 0L);
2271 if (retval != 0) {
2272 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2273 "was %x\n", info->line, retval);
2274 }
2275 #ifdef CY_DEBUG_DTR
2276 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2277 #endif
2278 }
2279
2280 if (info->tty) {
2281 set_bit(TTY_IO_ERROR, &info->tty->flags);
2282 }
2283 info->flags &= ~ASYNC_INITIALIZED;
2284
2285 CY_UNLOCK(info, flags);
2286 }
2287
2288 #ifdef CY_DEBUG_OPEN
2289 printk(KERN_DEBUG "cyc shutdown done\n");
2290 #endif
2291 } /* shutdown */
2292
2293 /*
2294 * ------------------------------------------------------------
2295 * cy_open() and friends
2296 * ------------------------------------------------------------
2297 */
2298
2299 static int
2300 block_til_ready(struct tty_struct *tty, struct file *filp,
2301 struct cyclades_port *info)
2302 {
2303 DECLARE_WAITQUEUE(wait, current);
2304 struct cyclades_card *cinfo;
2305 unsigned long flags;
2306 int chip, channel, index;
2307 int retval;
2308 void __iomem *base_addr;
2309
2310 cinfo = info->card;
2311 channel = info->line - cinfo->first_line;
2312
2313 /*
2314 * If the device is in the middle of being closed, then block
2315 * until it's done, and then try again.
2316 */
2317 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2318 wait_event_interruptible(info->close_wait,
2319 !(info->flags & ASYNC_CLOSING));
2320 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2321 }
2322
2323 /*
2324 * If non-blocking mode is set, then make the check up front
2325 * and then exit.
2326 */
2327 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2328 info->flags |= ASYNC_NORMAL_ACTIVE;
2329 return 0;
2330 }
2331
2332 /*
2333 * Block waiting for the carrier detect and the line to become
2334 * free (i.e., not in use by the callout). While we are in
2335 * this loop, info->count is dropped by one, so that
2336 * cy_close() knows when to free things. We restore it upon
2337 * exit, either normal or abnormal.
2338 */
2339 retval = 0;
2340 add_wait_queue(&info->open_wait, &wait);
2341 #ifdef CY_DEBUG_OPEN
2342 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2343 "count = %d\n", info->line, info->count);
2344 #endif
2345 CY_LOCK(info, flags);
2346 if (!tty_hung_up_p(filp))
2347 info->count--;
2348 CY_UNLOCK(info, flags);
2349 #ifdef CY_DEBUG_COUNT
2350 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2351 "%d\n", current->pid, info->count);
2352 #endif
2353 info->blocked_open++;
2354
2355 if (!IS_CYC_Z(*cinfo)) {
2356 chip = channel >> 2;
2357 channel &= 0x03;
2358 index = cinfo->bus_index;
2359 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2360
2361 while (1) {
2362 CY_LOCK(info, flags);
2363 if ((tty->termios->c_cflag & CBAUD)) {
2364 cy_writeb(base_addr + (CyCAR << index),
2365 (u_char) channel);
2366 cy_writeb(base_addr + (CyMSVR1 << index),
2367 CyRTS);
2368 cy_writeb(base_addr + (CyMSVR2 << index),
2369 CyDTR);
2370 #ifdef CY_DEBUG_DTR
2371 printk(KERN_DEBUG "cyc:block_til_ready raising "
2372 "DTR\n");
2373 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2374 readb(base_addr + (CyMSVR1 << index)),
2375 readb(base_addr + (CyMSVR2 << index)));
2376 #endif
2377 }
2378 CY_UNLOCK(info, flags);
2379
2380 set_current_state(TASK_INTERRUPTIBLE);
2381 if (tty_hung_up_p(filp) ||
2382 !(info->flags & ASYNC_INITIALIZED)) {
2383 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2384 -EAGAIN : -ERESTARTSYS);
2385 break;
2386 }
2387
2388 CY_LOCK(info, flags);
2389 cy_writeb(base_addr + (CyCAR << index),
2390 (u_char) channel);
2391 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2392 (readb(base_addr +
2393 (CyMSVR1 << index)) & CyDCD))) {
2394 CY_UNLOCK(info, flags);
2395 break;
2396 }
2397 CY_UNLOCK(info, flags);
2398
2399 if (signal_pending(current)) {
2400 retval = -ERESTARTSYS;
2401 break;
2402 }
2403 #ifdef CY_DEBUG_OPEN
2404 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2405 "ttyC%d, count = %d\n",
2406 info->line, info->count);
2407 #endif
2408 schedule();
2409 }
2410 } else {
2411 struct FIRM_ID __iomem *firm_id;
2412 struct ZFW_CTRL __iomem *zfw_ctrl;
2413 struct BOARD_CTRL __iomem *board_ctrl;
2414 struct CH_CTRL __iomem *ch_ctrl;
2415 int retval;
2416
2417 base_addr = cinfo->base_addr;
2418 firm_id = base_addr + ID_ADDRESS;
2419 if (!ISZLOADED(*cinfo)) {
2420 __set_current_state(TASK_RUNNING);
2421 remove_wait_queue(&info->open_wait, &wait);
2422 return -EINVAL;
2423 }
2424
2425 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2426 board_ctrl = &zfw_ctrl->board_ctrl;
2427 ch_ctrl = zfw_ctrl->ch_ctrl;
2428
2429 while (1) {
2430 if ((tty->termios->c_cflag & CBAUD)) {
2431 cy_writel(&ch_ctrl[channel].rs_control,
2432 readl(&ch_ctrl[channel].rs_control) |
2433 C_RS_RTS | C_RS_DTR);
2434 retval = cyz_issue_cmd(info->card,
2435 channel, C_CM_IOCTLM, 0L);
2436 if (retval != 0) {
2437 printk(KERN_ERR "cyc:block_til_ready "
2438 "retval on ttyC%d was %x\n",
2439 info->line, retval);
2440 }
2441 #ifdef CY_DEBUG_DTR
2442 printk(KERN_DEBUG "cyc:block_til_ready raising "
2443 "Z DTR\n");
2444 #endif
2445 }
2446
2447 set_current_state(TASK_INTERRUPTIBLE);
2448 if (tty_hung_up_p(filp) ||
2449 !(info->flags & ASYNC_INITIALIZED)) {
2450 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2451 -EAGAIN : -ERESTARTSYS);
2452 break;
2453 }
2454 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2455 (readl(&ch_ctrl[channel].rs_status) &
2456 C_RS_DCD))) {
2457 break;
2458 }
2459 if (signal_pending(current)) {
2460 retval = -ERESTARTSYS;
2461 break;
2462 }
2463 #ifdef CY_DEBUG_OPEN
2464 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2465 "ttyC%d, count = %d\n",
2466 info->line, info->count);
2467 #endif
2468 schedule();
2469 }
2470 }
2471 __set_current_state(TASK_RUNNING);
2472 remove_wait_queue(&info->open_wait, &wait);
2473 if (!tty_hung_up_p(filp)) {
2474 info->count++;
2475 #ifdef CY_DEBUG_COUNT
2476 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2477 "count to %d\n", current->pid, info->count);
2478 #endif
2479 }
2480 info->blocked_open--;
2481 #ifdef CY_DEBUG_OPEN
2482 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2483 "count = %d\n", info->line, info->count);
2484 #endif
2485 if (retval)
2486 return retval;
2487 info->flags |= ASYNC_NORMAL_ACTIVE;
2488 return 0;
2489 } /* block_til_ready */
2490
2491 /*
2492 * This routine is called whenever a serial port is opened. It
2493 * performs the serial-specific initialization for the tty structure.
2494 */
2495 static int cy_open(struct tty_struct *tty, struct file *filp)
2496 {
2497 struct cyclades_port *info;
2498 int retval, line;
2499
2500 line = tty->index;
2501 if ((line < 0) || (NR_PORTS <= line)) {
2502 return -ENODEV;
2503 }
2504 info = &cy_port[line];
2505 if (info->line < 0) {
2506 return -ENODEV;
2507 }
2508
2509 /* If the card's firmware hasn't been loaded,
2510 treat it as absent from the system. This
2511 will make the user pay attention.
2512 */
2513 if (IS_CYC_Z(*info->card)) {
2514 struct cyclades_card *cinfo = info->card;
2515 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2516
2517 if (!ISZLOADED(*cinfo)) {
2518 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2519 (cinfo->ctl_addr))->mail_box_0)) &&
2520 Z_FPGA_CHECK(*cinfo)) &&
2521 (ZFIRM_HLT == readl(
2522 &firm_id->signature))) {
2523 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2524 "need an external power supply for "
2525 "this number of ports.\nFirmware "
2526 "halted.\n");
2527 } else {
2528 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2529 "yet loaded\n");
2530 }
2531 return -ENODEV;
2532 }
2533 #ifdef CONFIG_CYZ_INTR
2534 else {
2535 /* In case this Z board is operating in interrupt mode, its
2536 interrupts should be enabled as soon as the first open
2537 happens to one of its ports. */
2538 if (!cinfo->intr_enabled) {
2539 struct ZFW_CTRL __iomem *zfw_ctrl;
2540 struct BOARD_CTRL __iomem *board_ctrl;
2541
2542 zfw_ctrl = cinfo->base_addr +
2543 (readl(&firm_id->zfwctrl_addr) &
2544 0xfffff);
2545
2546 board_ctrl = &zfw_ctrl->board_ctrl;
2547
2548 /* Enable interrupts on the PLX chip */
2549 cy_writew(cinfo->ctl_addr + 0x68,
2550 readw(cinfo->ctl_addr + 0x68) | 0x0900);
2551 /* Enable interrupts on the FW */
2552 retval = cyz_issue_cmd(cinfo, 0,
2553 C_CM_IRQ_ENBL, 0L);
2554 if (retval != 0) {
2555 printk(KERN_ERR "cyc:IRQ enable retval "
2556 "was %x\n", retval);
2557 }
2558 cinfo->nports =
2559 (int)readl(&board_ctrl->n_channel);
2560 cinfo->intr_enabled = 1;
2561 }
2562 }
2563 #endif /* CONFIG_CYZ_INTR */
2564 /* Make sure this Z port really exists in hardware */
2565 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2566 return -ENODEV;
2567 }
2568 #ifdef CY_DEBUG_OTHER
2569 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2570 #endif
2571 tty->driver_data = info;
2572 info->tty = tty;
2573 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2574 return -ENODEV;
2575 }
2576 #ifdef CY_DEBUG_OPEN
2577 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2578 info->count);
2579 #endif
2580 info->count++;
2581 #ifdef CY_DEBUG_COUNT
2582 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2583 current->pid, info->count);
2584 #endif
2585
2586 /*
2587 * If the port is the middle of closing, bail out now
2588 */
2589 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2590 wait_event_interruptible(info->close_wait,
2591 !(info->flags & ASYNC_CLOSING));
2592 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2593 }
2594
2595 /*
2596 * Start up serial port
2597 */
2598 retval = startup(info);
2599 if (retval) {
2600 return retval;
2601 }
2602
2603 retval = block_til_ready(tty, filp, info);
2604 if (retval) {
2605 #ifdef CY_DEBUG_OPEN
2606 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2607 "with %d\n", retval);
2608 #endif
2609 return retval;
2610 }
2611
2612 info->throttle = 0;
2613
2614 #ifdef CY_DEBUG_OPEN
2615 printk(KERN_DEBUG "cyc:cy_open done\n");
2616 #endif
2617 return 0;
2618 } /* cy_open */
2619
2620 /*
2621 * cy_wait_until_sent() --- wait until the transmitter is empty
2622 */
2623 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2624 {
2625 struct cyclades_card *card;
2626 struct cyclades_port *info = tty->driver_data;
2627 void __iomem *base_addr;
2628 int chip, channel, index;
2629 unsigned long orig_jiffies;
2630 int char_time;
2631
2632 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2633 return;
2634
2635 if (info->xmit_fifo_size == 0)
2636 return; /* Just in case.... */
2637
2638 orig_jiffies = jiffies;
2639 /*
2640 * Set the check interval to be 1/5 of the estimated time to
2641 * send a single character, and make it at least 1. The check
2642 * interval should also be less than the timeout.
2643 *
2644 * Note: we have to use pretty tight timings here to satisfy
2645 * the NIST-PCTS.
2646 */
2647 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2648 char_time = char_time / 5;
2649 if (char_time <= 0)
2650 char_time = 1;
2651 if (timeout < 0)
2652 timeout = 0;
2653 if (timeout)
2654 char_time = min(char_time, timeout);
2655 /*
2656 * If the transmitter hasn't cleared in twice the approximate
2657 * amount of time to send the entire FIFO, it probably won't
2658 * ever clear. This assumes the UART isn't doing flow
2659 * control, which is currently the case. Hence, if it ever
2660 * takes longer than info->timeout, this is probably due to a
2661 * UART bug of some kind. So, we clamp the timeout parameter at
2662 * 2*info->timeout.
2663 */
2664 if (!timeout || timeout > 2 * info->timeout)
2665 timeout = 2 * info->timeout;
2666 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2667 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2668 timeout, char_time, jiffies);
2669 #endif
2670 card = info->card;
2671 channel = (info->line) - (card->first_line);
2672 if (!IS_CYC_Z(*card)) {
2673 chip = channel >> 2;
2674 channel &= 0x03;
2675 index = card->bus_index;
2676 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2677 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2678 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2679 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2680 #endif
2681 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2682 break;
2683 if (timeout && time_after(jiffies, orig_jiffies +
2684 timeout))
2685 break;
2686 }
2687 } else {
2688 /* Nothing to do! */
2689 }
2690 /* Run one more char cycle */
2691 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2692 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2693 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2694 #endif
2695 }
2696
2697 /*
2698 * This routine is called when a particular tty device is closed.
2699 */
2700 static void cy_close(struct tty_struct *tty, struct file *filp)
2701 {
2702 struct cyclades_port *info = tty->driver_data;
2703 unsigned long flags;
2704
2705 #ifdef CY_DEBUG_OTHER
2706 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2707 #endif
2708
2709 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2710 return;
2711 }
2712
2713 CY_LOCK(info, flags);
2714 /* If the TTY is being hung up, nothing to do */
2715 if (tty_hung_up_p(filp)) {
2716 CY_UNLOCK(info, flags);
2717 return;
2718 }
2719 #ifdef CY_DEBUG_OPEN
2720 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2721 info->count);
2722 #endif
2723 if ((tty->count == 1) && (info->count != 1)) {
2724 /*
2725 * Uh, oh. tty->count is 1, which means that the tty
2726 * structure will be freed. Info->count should always
2727 * be one in these conditions. If it's greater than
2728 * one, we've got real problems, since it means the
2729 * serial port won't be shutdown.
2730 */
2731 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2732 "tty->count is 1, info->count is %d\n", info->count);
2733 info->count = 1;
2734 }
2735 #ifdef CY_DEBUG_COUNT
2736 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
2737 current->pid, info->count - 1);
2738 #endif
2739 if (--info->count < 0) {
2740 #ifdef CY_DEBUG_COUNT
2741 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2742 #endif
2743 info->count = 0;
2744 }
2745 if (info->count) {
2746 CY_UNLOCK(info, flags);
2747 return;
2748 }
2749 info->flags |= ASYNC_CLOSING;
2750
2751 /*
2752 * Now we wait for the transmit buffer to clear; and we notify
2753 * the line discipline to only process XON/XOFF characters.
2754 */
2755 tty->closing = 1;
2756 CY_UNLOCK(info, flags);
2757 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2758 tty_wait_until_sent(tty, info->closing_wait);
2759 }
2760 CY_LOCK(info, flags);
2761
2762 if (!IS_CYC_Z(*info->card)) {
2763 int channel = info->line - info->card->first_line;
2764 int index = info->card->bus_index;
2765 void __iomem *base_addr = info->card->base_addr +
2766 (cy_chip_offset[channel >> 2] << index);
2767 /* Stop accepting input */
2768 channel &= 0x03;
2769 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2770 cy_writeb(base_addr + (CySRER << index),
2771 readb(base_addr + (CySRER << index)) & ~CyRxData);
2772 if (info->flags & ASYNC_INITIALIZED) {
2773 /* Waiting for on-board buffers to be empty before closing
2774 the port */
2775 CY_UNLOCK(info, flags);
2776 cy_wait_until_sent(tty, info->timeout);
2777 CY_LOCK(info, flags);
2778 }
2779 } else {
2780 #ifdef Z_WAKE
2781 /* Waiting for on-board buffers to be empty before closing the port */
2782 void __iomem *base_addr = info->card->base_addr;
2783 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2784 struct ZFW_CTRL __iomem *zfw_ctrl =
2785 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2786 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2787 int channel = info->line - info->card->first_line;
2788 int retval;
2789
2790 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2791 retval = cyz_issue_cmd(info->card, channel,
2792 C_CM_IOCTLW, 0L);
2793 if (retval != 0) {
2794 printk(KERN_DEBUG "cyc:cy_close retval on "
2795 "ttyC%d was %x\n", info->line, retval);
2796 }
2797 CY_UNLOCK(info, flags);
2798 wait_for_completion_interruptible(&info->shutdown_wait);
2799 CY_LOCK(info, flags);
2800 }
2801 #endif
2802 }
2803
2804 CY_UNLOCK(info, flags);
2805 shutdown(info);
2806 if (tty->driver->flush_buffer)
2807 tty->driver->flush_buffer(tty);
2808 tty_ldisc_flush(tty);
2809 CY_LOCK(info, flags);
2810
2811 tty->closing = 0;
2812 info->event = 0;
2813 info->tty = NULL;
2814 if (info->blocked_open) {
2815 CY_UNLOCK(info, flags);
2816 if (info->close_delay) {
2817 msleep_interruptible(jiffies_to_msecs
2818 (info->close_delay));
2819 }
2820 wake_up_interruptible(&info->open_wait);
2821 CY_LOCK(info, flags);
2822 }
2823 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2824 wake_up_interruptible(&info->close_wait);
2825
2826 #ifdef CY_DEBUG_OTHER
2827 printk(KERN_DEBUG "cyc:cy_close done\n");
2828 #endif
2829
2830 CY_UNLOCK(info, flags);
2831 } /* cy_close */
2832
2833 /* This routine gets called when tty_write has put something into
2834 * the write_queue. The characters may come from user space or
2835 * kernel space.
2836 *
2837 * This routine will return the number of characters actually
2838 * accepted for writing.
2839 *
2840 * If the port is not already transmitting stuff, start it off by
2841 * enabling interrupts. The interrupt service routine will then
2842 * ensure that the characters are sent.
2843 * If the port is already active, there is no need to kick it.
2844 *
2845 */
2846 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2847 {
2848 struct cyclades_port *info = tty->driver_data;
2849 unsigned long flags;
2850 int c, ret = 0;
2851
2852 #ifdef CY_DEBUG_IO
2853 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2854 #endif
2855
2856 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2857 return 0;
2858 }
2859
2860 if (!info->xmit_buf)
2861 return 0;
2862
2863 CY_LOCK(info, flags);
2864 while (1) {
2865 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2866 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2867
2868 if (c <= 0)
2869 break;
2870
2871 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2872 info->xmit_head = (info->xmit_head + c) &
2873 (SERIAL_XMIT_SIZE - 1);
2874 info->xmit_cnt += c;
2875 buf += c;
2876 count -= c;
2877 ret += c;
2878 }
2879 CY_UNLOCK(info, flags);
2880
2881 info->idle_stats.xmit_bytes += ret;
2882 info->idle_stats.xmit_idle = jiffies;
2883
2884 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2885 start_xmit(info);
2886 }
2887 return ret;
2888 } /* cy_write */
2889
2890 /*
2891 * This routine is called by the kernel to write a single
2892 * character to the tty device. If the kernel uses this routine,
2893 * it must call the flush_chars() routine (if defined) when it is
2894 * done stuffing characters into the driver. If there is no room
2895 * in the queue, the character is ignored.
2896 */
2897 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2898 {
2899 struct cyclades_port *info = tty->driver_data;
2900 unsigned long flags;
2901
2902 #ifdef CY_DEBUG_IO
2903 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2904 #endif
2905
2906 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2907 return;
2908
2909 if (!info->xmit_buf)
2910 return;
2911
2912 CY_LOCK(info, flags);
2913 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2914 CY_UNLOCK(info, flags);
2915 return;
2916 }
2917
2918 info->xmit_buf[info->xmit_head++] = ch;
2919 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2920 info->xmit_cnt++;
2921 info->idle_stats.xmit_bytes++;
2922 info->idle_stats.xmit_idle = jiffies;
2923 CY_UNLOCK(info, flags);
2924 } /* cy_put_char */
2925
2926 /*
2927 * This routine is called by the kernel after it has written a
2928 * series of characters to the tty device using put_char().
2929 */
2930 static void cy_flush_chars(struct tty_struct *tty)
2931 {
2932 struct cyclades_port *info = tty->driver_data;
2933
2934 #ifdef CY_DEBUG_IO
2935 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2936 #endif
2937
2938 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2939 return;
2940
2941 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2942 !info->xmit_buf)
2943 return;
2944
2945 start_xmit(info);
2946 } /* cy_flush_chars */
2947
2948 /*
2949 * This routine returns the numbers of characters the tty driver
2950 * will accept for queuing to be written. This number is subject
2951 * to change as output buffers get emptied, or if the output flow
2952 * control is activated.
2953 */
2954 static int cy_write_room(struct tty_struct *tty)
2955 {
2956 struct cyclades_port *info = tty->driver_data;
2957 int ret;
2958
2959 #ifdef CY_DEBUG_IO
2960 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2961 #endif
2962
2963 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2964 return 0;
2965 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2966 if (ret < 0)
2967 ret = 0;
2968 return ret;
2969 } /* cy_write_room */
2970
2971 static int cy_chars_in_buffer(struct tty_struct *tty)
2972 {
2973 struct cyclades_card *card;
2974 struct cyclades_port *info = tty->driver_data;
2975 int channel;
2976
2977 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2978 return 0;
2979
2980 card = info->card;
2981 channel = (info->line) - (card->first_line);
2982
2983 #ifdef Z_EXT_CHARS_IN_BUFFER
2984 if (!IS_CYC_Z(cy_card[card])) {
2985 #endif /* Z_EXT_CHARS_IN_BUFFER */
2986 #ifdef CY_DEBUG_IO
2987 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2988 info->line, info->xmit_cnt);
2989 #endif
2990 return info->xmit_cnt;
2991 #ifdef Z_EXT_CHARS_IN_BUFFER
2992 } else {
2993 static struct FIRM_ID *firm_id;
2994 static struct ZFW_CTRL *zfw_ctrl;
2995 static struct CH_CTRL *ch_ctrl;
2996 static struct BUF_CTRL *buf_ctrl;
2997 int char_count;
2998 __u32 tx_put, tx_get, tx_bufsize;
2999
3000 firm_id = card->base_addr + ID_ADDRESS;
3001 zfw_ctrl = card->base_addr +
3002 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3003 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3004 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3005
3006 tx_get = readl(&buf_ctrl->tx_get);
3007 tx_put = readl(&buf_ctrl->tx_put);
3008 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
3009 if (tx_put >= tx_get)
3010 char_count = tx_put - tx_get;
3011 else
3012 char_count = tx_put - tx_get + tx_bufsize;
3013 #ifdef CY_DEBUG_IO
3014 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
3015 info->line, info->xmit_cnt + char_count);
3016 #endif
3017 return info->xmit_cnt + char_count;
3018 }
3019 #endif /* Z_EXT_CHARS_IN_BUFFER */
3020 } /* cy_chars_in_buffer */
3021
3022 /*
3023 * ------------------------------------------------------------
3024 * cy_ioctl() and friends
3025 * ------------------------------------------------------------
3026 */
3027
3028 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
3029 {
3030 int co, co_val, bpr;
3031 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3032 25000000);
3033
3034 if (baud == 0) {
3035 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3036 return;
3037 }
3038
3039 /* determine which prescaler to use */
3040 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3041 if (cy_clock / co_val / baud > 63)
3042 break;
3043 }
3044
3045 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3046 if (bpr > 255)
3047 bpr = 255;
3048
3049 info->tbpr = info->rbpr = bpr;
3050 info->tco = info->rco = co;
3051 }
3052
3053 /*
3054 * This routine finds or computes the various line characteristics.
3055 * It used to be called config_setup
3056 */
3057 static void set_line_char(struct cyclades_port *info)
3058 {
3059 struct cyclades_card *card;
3060 unsigned long flags;
3061 void __iomem *base_addr;
3062 int chip, channel, index;
3063 unsigned cflag, iflag;
3064 unsigned short chip_number;
3065 int baud, baud_rate = 0;
3066 int i;
3067
3068 if (!info->tty || !info->tty->termios) {
3069 return;
3070 }
3071 if (info->line == -1) {
3072 return;
3073 }
3074 cflag = info->tty->termios->c_cflag;
3075 iflag = info->tty->termios->c_iflag;
3076
3077 /*
3078 * Set up the tty->alt_speed kludge
3079 */
3080 if (info->tty) {
3081 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3082 info->tty->alt_speed = 57600;
3083 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3084 info->tty->alt_speed = 115200;
3085 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3086 info->tty->alt_speed = 230400;
3087 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3088 info->tty->alt_speed = 460800;
3089 }
3090
3091 card = info->card;
3092 channel = info->line - card->first_line;
3093 chip_number = channel / 4;
3094
3095 if (!IS_CYC_Z(*card)) {
3096
3097 index = card->bus_index;
3098
3099 /* baud rate */
3100 baud = tty_get_baud_rate(info->tty);
3101 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3102 ASYNC_SPD_CUST) {
3103 if (info->custom_divisor)
3104 baud_rate = info->baud / info->custom_divisor;
3105 else
3106 baud_rate = info->baud;
3107 } else if (baud > CD1400_MAX_SPEED) {
3108 baud = CD1400_MAX_SPEED;
3109 }
3110 /* find the baud index */
3111 for (i = 0; i < 20; i++) {
3112 if (baud == baud_table[i]) {
3113 break;
3114 }
3115 }
3116 if (i == 20) {
3117 i = 19; /* CD1400_MAX_SPEED */
3118 }
3119
3120 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3121 ASYNC_SPD_CUST) {
3122 cyy_baud_calc(info, baud_rate);
3123 } else {
3124 if (info->chip_rev >= CD1400_REV_J) {
3125 /* It is a CD1400 rev. J or later */
3126 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3127 info->tco = baud_co_60[i]; /* Tx CO */
3128 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3129 info->rco = baud_co_60[i]; /* Rx CO */
3130 } else {
3131 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3132 info->tco = baud_co_25[i]; /* Tx CO */
3133 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3134 info->rco = baud_co_25[i]; /* Rx CO */
3135 }
3136 }
3137 if (baud_table[i] == 134) {
3138 /* get it right for 134.5 baud */
3139 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3140 2;
3141 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3142 ASYNC_SPD_CUST) {
3143 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3144 baud_rate) + 2;
3145 } else if (baud_table[i]) {
3146 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3147 baud_table[i]) + 2;
3148 /* this needs to be propagated into the card info */
3149 } else {
3150 info->timeout = 0;
3151 }
3152 /* By tradition (is it a standard?) a baud rate of zero
3153 implies the line should be/has been closed. A bit
3154 later in this routine such a test is performed. */
3155
3156 /* byte size and parity */
3157 info->cor5 = 0;
3158 info->cor4 = 0;
3159 /* receive threshold */
3160 info->cor3 = (info->default_threshold ?
3161 info->default_threshold : baud_cor3[i]);
3162 info->cor2 = CyETC;
3163 switch (cflag & CSIZE) {
3164 case CS5:
3165 info->cor1 = Cy_5_BITS;
3166 break;
3167 case CS6:
3168 info->cor1 = Cy_6_BITS;
3169 break;
3170 case CS7:
3171 info->cor1 = Cy_7_BITS;
3172 break;
3173 case CS8:
3174 info->cor1 = Cy_8_BITS;
3175 break;
3176 }
3177 if (cflag & CSTOPB) {
3178 info->cor1 |= Cy_2_STOP;
3179 }
3180 if (cflag & PARENB) {
3181 if (cflag & PARODD) {
3182 info->cor1 |= CyPARITY_O;
3183 } else {
3184 info->cor1 |= CyPARITY_E;
3185 }
3186 } else {
3187 info->cor1 |= CyPARITY_NONE;
3188 }
3189
3190 /* CTS flow control flag */
3191 if (cflag & CRTSCTS) {
3192 info->flags |= ASYNC_CTS_FLOW;
3193 info->cor2 |= CyCtsAE;
3194 } else {
3195 info->flags &= ~ASYNC_CTS_FLOW;
3196 info->cor2 &= ~CyCtsAE;
3197 }
3198 if (cflag & CLOCAL)
3199 info->flags &= ~ASYNC_CHECK_CD;
3200 else
3201 info->flags |= ASYNC_CHECK_CD;
3202
3203 /***********************************************
3204 The hardware option, CyRtsAO, presents RTS when
3205 the chip has characters to send. Since most modems
3206 use RTS as reverse (inbound) flow control, this
3207 option is not used. If inbound flow control is
3208 necessary, DTR can be programmed to provide the
3209 appropriate signals for use with a non-standard
3210 cable. Contact Marcio Saito for details.
3211 ***********************************************/
3212
3213 chip = channel >> 2;
3214 channel &= 0x03;
3215 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3216
3217 CY_LOCK(info, flags);
3218 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3219
3220 /* tx and rx baud rate */
3221
3222 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3223 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3224 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3225 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3226
3227 /* set line characteristics according configuration */
3228
3229 cy_writeb(base_addr + (CySCHR1 << index),
3230 START_CHAR(info->tty));
3231 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3232 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3233 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3234 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3235 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3236 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3237
3238 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3239 CyCOR3ch, index);
3240
3241 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3242 cy_writeb(base_addr + (CyRTPR << index),
3243 (info->default_timeout ? info->default_timeout : 0x02));
3244 /* 10ms rx timeout */
3245
3246 if (C_CLOCAL(info->tty)) {
3247 /* without modem intr */
3248 cy_writeb(base_addr + (CySRER << index),
3249 readb(base_addr + (CySRER << index)) | CyMdmCh);
3250 /* act on 1->0 modem transitions */
3251 if ((cflag & CRTSCTS) && info->rflow) {
3252 cy_writeb(base_addr + (CyMCOR1 << index),
3253 (CyCTS | rflow_thr[i]));
3254 } else {
3255 cy_writeb(base_addr + (CyMCOR1 << index),
3256 CyCTS);
3257 }
3258 /* act on 0->1 modem transitions */
3259 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3260 } else {
3261 /* without modem intr */
3262 cy_writeb(base_addr + (CySRER << index),
3263 readb(base_addr +
3264 (CySRER << index)) | CyMdmCh);
3265 /* act on 1->0 modem transitions */
3266 if ((cflag & CRTSCTS) && info->rflow) {
3267 cy_writeb(base_addr + (CyMCOR1 << index),
3268 (CyDSR | CyCTS | CyRI | CyDCD |
3269 rflow_thr[i]));
3270 } else {
3271 cy_writeb(base_addr + (CyMCOR1 << index),
3272 CyDSR | CyCTS | CyRI | CyDCD);
3273 }
3274 /* act on 0->1 modem transitions */
3275 cy_writeb(base_addr + (CyMCOR2 << index),
3276 CyDSR | CyCTS | CyRI | CyDCD);
3277 }
3278
3279 if (i == 0) { /* baud rate is zero, turn off line */
3280 if (info->rtsdtr_inv) {
3281 cy_writeb(base_addr + (CyMSVR1 << index),
3282 ~CyRTS);
3283 } else {
3284 cy_writeb(base_addr + (CyMSVR2 << index),
3285 ~CyDTR);
3286 }
3287 #ifdef CY_DEBUG_DTR
3288 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3289 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3290 readb(base_addr + (CyMSVR1 << index)),
3291 readb(base_addr + (CyMSVR2 << index)));
3292 #endif
3293 } else {
3294 if (info->rtsdtr_inv) {
3295 cy_writeb(base_addr + (CyMSVR1 << index),
3296 CyRTS);
3297 } else {
3298 cy_writeb(base_addr + (CyMSVR2 << index),
3299 CyDTR);
3300 }
3301 #ifdef CY_DEBUG_DTR
3302 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3303 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3304 readb(base_addr + (CyMSVR1 << index)),
3305 readb(base_addr + (CyMSVR2 << index)));
3306 #endif
3307 }
3308
3309 if (info->tty) {
3310 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3311 }
3312 CY_UNLOCK(info, flags);
3313
3314 } else {
3315 struct FIRM_ID __iomem *firm_id;
3316 struct ZFW_CTRL __iomem *zfw_ctrl;
3317 struct BOARD_CTRL __iomem *board_ctrl;
3318 struct CH_CTRL __iomem *ch_ctrl;
3319 struct BUF_CTRL __iomem *buf_ctrl;
3320 __u32 sw_flow;
3321 int retval;
3322
3323 firm_id = card->base_addr + ID_ADDRESS;
3324 if (!ISZLOADED(*card)) {
3325 return;
3326 }
3327
3328 zfw_ctrl = card->base_addr +
3329 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3330 board_ctrl = &zfw_ctrl->board_ctrl;
3331 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3332 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3333
3334 /* baud rate */
3335 baud = tty_get_baud_rate(info->tty);
3336 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3337 ASYNC_SPD_CUST) {
3338 if (info->custom_divisor)
3339 baud_rate = info->baud / info->custom_divisor;
3340 else
3341 baud_rate = info->baud;
3342 } else if (baud > CYZ_MAX_SPEED) {
3343 baud = CYZ_MAX_SPEED;
3344 }
3345 cy_writel(&ch_ctrl->comm_baud, baud);
3346
3347 if (baud == 134) {
3348 /* get it right for 134.5 baud */
3349 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3350 2;
3351 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3352 ASYNC_SPD_CUST) {
3353 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3354 baud_rate) + 2;
3355 } else if (baud) {
3356 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3357 baud) + 2;
3358 /* this needs to be propagated into the card info */
3359 } else {
3360 info->timeout = 0;
3361 }
3362
3363 /* byte size and parity */
3364 switch (cflag & CSIZE) {
3365 case CS5:
3366 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3367 break;
3368 case CS6:
3369 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3370 break;
3371 case CS7:
3372 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3373 break;
3374 case CS8:
3375 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3376 break;
3377 }
3378 if (cflag & CSTOPB) {
3379 cy_writel(&ch_ctrl->comm_data_l,
3380 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3381 } else {
3382 cy_writel(&ch_ctrl->comm_data_l,
3383 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3384 }
3385 if (cflag & PARENB) {
3386 if (cflag & PARODD) {
3387 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3388 } else {
3389 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3390 }
3391 } else {
3392 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3393 }
3394
3395 /* CTS flow control flag */
3396 if (cflag & CRTSCTS) {
3397 cy_writel(&ch_ctrl->hw_flow,
3398 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3399 } else {
3400 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3401 ~(C_RS_CTS | C_RS_RTS));
3402 }
3403 /* As the HW flow control is done in firmware, the driver
3404 doesn't need to care about it */
3405 info->flags &= ~ASYNC_CTS_FLOW;
3406
3407 /* XON/XOFF/XANY flow control flags */
3408 sw_flow = 0;
3409 if (iflag & IXON) {
3410 sw_flow |= C_FL_OXX;
3411 if (iflag & IXANY)
3412 sw_flow |= C_FL_OIXANY;
3413 }
3414 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3415
3416 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3417 if (retval != 0) {
3418 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3419 "was %x\n", info->line, retval);
3420 }
3421
3422 /* CD sensitivity */
3423 if (cflag & CLOCAL) {
3424 info->flags &= ~ASYNC_CHECK_CD;
3425 } else {
3426 info->flags |= ASYNC_CHECK_CD;
3427 }
3428
3429 if (baud == 0) { /* baud rate is zero, turn off line */
3430 cy_writel(&ch_ctrl->rs_control,
3431 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3432 #ifdef CY_DEBUG_DTR
3433 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3434 #endif
3435 } else {
3436 cy_writel(&ch_ctrl->rs_control,
3437 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3438 #ifdef CY_DEBUG_DTR
3439 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3440 #endif
3441 }
3442
3443 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3444 if (retval != 0) {
3445 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3446 "was %x\n", info->line, retval);
3447 }
3448
3449 if (info->tty) {
3450 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3451 }
3452 }
3453 } /* set_line_char */
3454
3455 static int
3456 get_serial_info(struct cyclades_port *info,
3457 struct serial_struct __user * retinfo)
3458 {
3459 struct serial_struct tmp;
3460 struct cyclades_card *cinfo = info->card;
3461
3462 if (!retinfo)
3463 return -EFAULT;
3464 memset(&tmp, 0, sizeof(tmp));
3465 tmp.type = info->type;
3466 tmp.line = info->line;
3467 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3468 cinfo->first_line;
3469 tmp.irq = cinfo->irq;
3470 tmp.flags = info->flags;
3471 tmp.close_delay = info->close_delay;
3472 tmp.closing_wait = info->closing_wait;
3473 tmp.baud_base = info->baud;
3474 tmp.custom_divisor = info->custom_divisor;
3475 tmp.hub6 = 0; /*!!! */
3476 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3477 } /* get_serial_info */
3478
3479 static int
3480 set_serial_info(struct cyclades_port *info,
3481 struct serial_struct __user * new_info)
3482 {
3483 struct serial_struct new_serial;
3484 struct cyclades_port old_info;
3485
3486 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3487 return -EFAULT;
3488 old_info = *info;
3489
3490 if (!capable(CAP_SYS_ADMIN)) {
3491 if (new_serial.close_delay != info->close_delay ||
3492 new_serial.baud_base != info->baud ||
3493 (new_serial.flags & ASYNC_FLAGS &
3494 ~ASYNC_USR_MASK) !=
3495 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3496 return -EPERM;
3497 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3498 (new_serial.flags & ASYNC_USR_MASK);
3499 info->baud = new_serial.baud_base;
3500 info->custom_divisor = new_serial.custom_divisor;
3501 goto check_and_exit;
3502 }
3503
3504 /*
3505 * OK, past this point, all the error checking has been done.
3506 * At this point, we start making changes.....
3507 */
3508
3509 info->baud = new_serial.baud_base;
3510 info->custom_divisor = new_serial.custom_divisor;
3511 info->flags = (info->flags & ~ASYNC_FLAGS) |
3512 (new_serial.flags & ASYNC_FLAGS);
3513 info->close_delay = new_serial.close_delay * HZ / 100;
3514 info->closing_wait = new_serial.closing_wait * HZ / 100;
3515
3516 check_and_exit:
3517 if (info->flags & ASYNC_INITIALIZED) {
3518 set_line_char(info);
3519 return 0;
3520 } else {
3521 return startup(info);
3522 }
3523 } /* set_serial_info */
3524
3525 /*
3526 * get_lsr_info - get line status register info
3527 *
3528 * Purpose: Let user call ioctl() to get info when the UART physically
3529 * is emptied. On bus types like RS485, the transmitter must
3530 * release the bus after transmitting. This must be done when
3531 * the transmit shift register is empty, not be done when the
3532 * transmit holding register is empty. This functionality
3533 * allows an RS485 driver to be written in user space.
3534 */
3535 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3536 {
3537 struct cyclades_card *card;
3538 int chip, channel, index;
3539 unsigned char status;
3540 unsigned int result;
3541 unsigned long flags;
3542 void __iomem *base_addr;
3543
3544 card = info->card;
3545 channel = (info->line) - (card->first_line);
3546 if (!IS_CYC_Z(*card)) {
3547 chip = channel >> 2;
3548 channel &= 0x03;
3549 index = card->bus_index;
3550 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3551
3552 CY_LOCK(info, flags);
3553 status = readb(base_addr + (CySRER << index)) &
3554 (CyTxRdy | CyTxMpty);
3555 CY_UNLOCK(info, flags);
3556 result = (status ? 0 : TIOCSER_TEMT);
3557 } else {
3558 /* Not supported yet */
3559 return -EINVAL;
3560 }
3561 return put_user(result, (unsigned long __user *)value);
3562 }
3563
3564 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3565 {
3566 struct cyclades_port *info = tty->driver_data;
3567 struct cyclades_card *card;
3568 int chip, channel, index;
3569 void __iomem *base_addr;
3570 unsigned long flags;
3571 unsigned char status;
3572 unsigned long lstatus;
3573 unsigned int result;
3574 struct FIRM_ID __iomem *firm_id;
3575 struct ZFW_CTRL __iomem *zfw_ctrl;
3576 struct BOARD_CTRL __iomem *board_ctrl;
3577 struct CH_CTRL __iomem *ch_ctrl;
3578
3579 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3580 return -ENODEV;
3581
3582 card = info->card;
3583 channel = info->line - card->first_line;
3584 if (!IS_CYC_Z(*card)) {
3585 chip = channel >> 2;
3586 channel &= 0x03;
3587 index = card->bus_index;
3588 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3589
3590 CY_LOCK(info, flags);
3591 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3592 status = readb(base_addr + (CyMSVR1 << index));
3593 status |= readb(base_addr + (CyMSVR2 << index));
3594 CY_UNLOCK(info, flags);
3595
3596 if (info->rtsdtr_inv) {
3597 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3598 ((status & CyDTR) ? TIOCM_RTS : 0);
3599 } else {
3600 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3601 ((status & CyDTR) ? TIOCM_DTR : 0);
3602 }
3603 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3604 ((status & CyRI) ? TIOCM_RNG : 0) |
3605 ((status & CyDSR) ? TIOCM_DSR : 0) |
3606 ((status & CyCTS) ? TIOCM_CTS : 0);
3607 } else {
3608 base_addr = card->base_addr;
3609 firm_id = card->base_addr + ID_ADDRESS;
3610 if (ISZLOADED(*card)) {
3611 zfw_ctrl = card->base_addr +
3612 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3613 board_ctrl = &zfw_ctrl->board_ctrl;
3614 ch_ctrl = zfw_ctrl->ch_ctrl;
3615 lstatus = readl(&ch_ctrl[channel].rs_status);
3616 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3617 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3618 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3619 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3620 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3621 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3622 } else {
3623 result = 0;
3624 return -ENODEV;
3625 }
3626
3627 }
3628 return result;
3629 } /* cy_tiomget */
3630
3631 static int
3632 cy_tiocmset(struct tty_struct *tty, struct file *file,
3633 unsigned int set, unsigned int clear)
3634 {
3635 struct cyclades_port *info = tty->driver_data;
3636 struct cyclades_card *card;
3637 int chip, channel, index;
3638 void __iomem *base_addr;
3639 unsigned long flags;
3640 struct FIRM_ID __iomem *firm_id;
3641 struct ZFW_CTRL __iomem *zfw_ctrl;
3642 struct BOARD_CTRL __iomem *board_ctrl;
3643 struct CH_CTRL __iomem *ch_ctrl;
3644 int retval;
3645
3646 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3647 return -ENODEV;
3648
3649 card = info->card;
3650 channel = (info->line) - (card->first_line);
3651 if (!IS_CYC_Z(*card)) {
3652 chip = channel >> 2;
3653 channel &= 0x03;
3654 index = card->bus_index;
3655 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3656
3657 if (set & TIOCM_RTS) {
3658 CY_LOCK(info, flags);
3659 cy_writeb(base_addr + (CyCAR << index),
3660 (u_char) channel);
3661 if (info->rtsdtr_inv) {
3662 cy_writeb(base_addr + (CyMSVR2 << index),
3663 CyDTR);
3664 } else {
3665 cy_writeb(base_addr + (CyMSVR1 << index),
3666 CyRTS);
3667 }
3668 CY_UNLOCK(info, flags);
3669 }
3670 if (clear & TIOCM_RTS) {
3671 CY_LOCK(info, flags);
3672 cy_writeb(base_addr + (CyCAR << index),
3673 (u_char) channel);
3674 if (info->rtsdtr_inv) {
3675 cy_writeb(base_addr + (CyMSVR2 << index),
3676 ~CyDTR);
3677 } else {
3678 cy_writeb(base_addr + (CyMSVR1 << index),
3679 ~CyRTS);
3680 }
3681 CY_UNLOCK(info, flags);
3682 }
3683 if (set & TIOCM_DTR) {
3684 CY_LOCK(info, flags);
3685 cy_writeb(base_addr + (CyCAR << index),
3686 (u_char) channel);
3687 if (info->rtsdtr_inv) {
3688 cy_writeb(base_addr + (CyMSVR1 << index),
3689 CyRTS);
3690 } else {
3691 cy_writeb(base_addr + (CyMSVR2 << index),
3692 CyDTR);
3693 }
3694 #ifdef CY_DEBUG_DTR
3695 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3696 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3697 readb(base_addr + (CyMSVR1 << index)),
3698 readb(base_addr + (CyMSVR2 << index)));
3699 #endif
3700 CY_UNLOCK(info, flags);
3701 }
3702 if (clear & TIOCM_DTR) {
3703 CY_LOCK(info, flags);
3704 cy_writeb(base_addr + (CyCAR << index),
3705 (u_char) channel);
3706 if (info->rtsdtr_inv) {
3707 cy_writeb(base_addr + (CyMSVR1 << index),
3708 ~CyRTS);
3709 } else {
3710 cy_writeb(base_addr + (CyMSVR2 << index),
3711 ~CyDTR);
3712 }
3713
3714 #ifdef CY_DEBUG_DTR
3715 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3716 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3717 readb(base_addr + (CyMSVR1 << index)),
3718 readb(base_addr + (CyMSVR2 << index)));
3719 #endif
3720 CY_UNLOCK(info, flags);
3721 }
3722 } else {
3723 base_addr = card->base_addr;
3724
3725 firm_id = card->base_addr + ID_ADDRESS;
3726 if (ISZLOADED(*card)) {
3727 zfw_ctrl = card->base_addr +
3728 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3729 board_ctrl = &zfw_ctrl->board_ctrl;
3730 ch_ctrl = zfw_ctrl->ch_ctrl;
3731
3732 if (set & TIOCM_RTS) {
3733 CY_LOCK(info, flags);
3734 cy_writel(&ch_ctrl[channel].rs_control,
3735 readl(&ch_ctrl[channel].rs_control) |
3736 C_RS_RTS);
3737 CY_UNLOCK(info, flags);
3738 }
3739 if (clear & TIOCM_RTS) {
3740 CY_LOCK(info, flags);
3741 cy_writel(&ch_ctrl[channel].rs_control,
3742 readl(&ch_ctrl[channel].rs_control) &
3743 ~C_RS_RTS);
3744 CY_UNLOCK(info, flags);
3745 }
3746 if (set & TIOCM_DTR) {
3747 CY_LOCK(info, flags);
3748 cy_writel(&ch_ctrl[channel].rs_control,
3749 readl(&ch_ctrl[channel].rs_control) |
3750 C_RS_DTR);
3751 #ifdef CY_DEBUG_DTR
3752 printk(KERN_DEBUG "cyc:set_modem_info raising "
3753 "Z DTR\n");
3754 #endif
3755 CY_UNLOCK(info, flags);
3756 }
3757 if (clear & TIOCM_DTR) {
3758 CY_LOCK(info, flags);
3759 cy_writel(&ch_ctrl[channel].rs_control,
3760 readl(&ch_ctrl[channel].rs_control) &
3761 ~C_RS_DTR);
3762 #ifdef CY_DEBUG_DTR
3763 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3764 "Z DTR\n");
3765 #endif
3766 CY_UNLOCK(info, flags);
3767 }
3768 } else {
3769 return -ENODEV;
3770 }
3771 CY_LOCK(info, flags);
3772 retval = cyz_issue_cmd(info->card,
3773 channel, C_CM_IOCTLM, 0L);
3774 if (retval != 0) {
3775 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3776 "was %x\n", info->line, retval);
3777 }
3778 CY_UNLOCK(info, flags);
3779 }
3780 return 0;
3781 } /* cy_tiocmset */
3782
3783 /*
3784 * cy_break() --- routine which turns the break handling on or off
3785 */
3786 static void cy_break(struct tty_struct *tty, int break_state)
3787 {
3788 struct cyclades_port *info = tty->driver_data;
3789 unsigned long flags;
3790
3791 if (serial_paranoia_check(info, tty->name, "cy_break"))
3792 return;
3793
3794 CY_LOCK(info, flags);
3795 if (!IS_CYC_Z(*info->card)) {
3796 /* Let the transmit ISR take care of this (since it
3797 requires stuffing characters into the output stream).
3798 */
3799 if (break_state == -1) {
3800 if (!info->breakon) {
3801 info->breakon = 1;
3802 if (!info->xmit_cnt) {
3803 CY_UNLOCK(info, flags);
3804 start_xmit(info);
3805 CY_LOCK(info, flags);
3806 }
3807 }
3808 } else {
3809 if (!info->breakoff) {
3810 info->breakoff = 1;
3811 if (!info->xmit_cnt) {
3812 CY_UNLOCK(info, flags);
3813 start_xmit(info);
3814 CY_LOCK(info, flags);
3815 }
3816 }
3817 }
3818 } else {
3819 int retval;
3820
3821 if (break_state == -1) {
3822 retval = cyz_issue_cmd(info->card,
3823 info->line - info->card->first_line,
3824 C_CM_SET_BREAK, 0L);
3825 if (retval != 0) {
3826 printk(KERN_ERR "cyc:cy_break (set) retval on "
3827 "ttyC%d was %x\n", info->line, retval);
3828 }
3829 } else {
3830 retval = cyz_issue_cmd(info->card,
3831 info->line - info->card->first_line,
3832 C_CM_CLR_BREAK, 0L);
3833 if (retval != 0) {
3834 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3835 "on ttyC%d was %x\n", info->line,
3836 retval);
3837 }
3838 }
3839 }
3840 CY_UNLOCK(info, flags);
3841 } /* cy_break */
3842
3843 static int
3844 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3845 {
3846
3847 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3848 return -EFAULT;
3849 info->mon.int_count = 0;
3850 info->mon.char_count = 0;
3851 info->mon.char_max = 0;
3852 info->mon.char_last = 0;
3853 return 0;
3854 } /* get_mon_info */
3855
3856 static int set_threshold(struct cyclades_port *info, unsigned long value)
3857 {
3858 struct cyclades_card *card;
3859 void __iomem *base_addr;
3860 int channel, chip, index;
3861 unsigned long flags;
3862
3863 card = info->card;
3864 channel = info->line - card->first_line;
3865 if (!IS_CYC_Z(*card)) {
3866 chip = channel >> 2;
3867 channel &= 0x03;
3868 index = card->bus_index;
3869 base_addr =
3870 card->base_addr + (cy_chip_offset[chip] << index);
3871
3872 info->cor3 &= ~CyREC_FIFO;
3873 info->cor3 |= value & CyREC_FIFO;
3874
3875 CY_LOCK(info, flags);
3876 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3877 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3878 CY_UNLOCK(info, flags);
3879 } else {
3880 /* Nothing to do! */
3881 }
3882 return 0;
3883 } /* set_threshold */
3884
3885 static int
3886 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3887 {
3888 struct cyclades_card *card;
3889 void __iomem *base_addr;
3890 int channel, chip, index;
3891 unsigned long tmp;
3892
3893 card = info->card;
3894 channel = info->line - card->first_line;
3895 if (!IS_CYC_Z(*card)) {
3896 chip = channel >> 2;
3897 channel &= 0x03;
3898 index = card->bus_index;
3899 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3900
3901 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3902 return put_user(tmp, value);
3903 } else {
3904 /* Nothing to do! */
3905 return 0;
3906 }
3907 } /* get_threshold */
3908
3909 static int
3910 set_default_threshold(struct cyclades_port *info, unsigned long value)
3911 {
3912 info->default_threshold = value & 0x0f;
3913 return 0;
3914 } /* set_default_threshold */
3915
3916 static int
3917 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3918 {
3919 return put_user(info->default_threshold, value);
3920 } /* get_default_threshold */
3921
3922 static int set_timeout(struct cyclades_port *info, unsigned long value)
3923 {
3924 struct cyclades_card *card;
3925 void __iomem *base_addr;
3926 int channel, chip, index;
3927 unsigned long flags;
3928
3929 card = info->card;
3930 channel = info->line - card->first_line;
3931 if (!IS_CYC_Z(*card)) {
3932 chip = channel >> 2;
3933 channel &= 0x03;
3934 index = card->bus_index;
3935 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3936
3937 CY_LOCK(info, flags);
3938 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3939 CY_UNLOCK(info, flags);
3940 } else {
3941 /* Nothing to do! */
3942 }
3943 return 0;
3944 } /* set_timeout */
3945
3946 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3947 {
3948 struct cyclades_card *card;
3949 void __iomem *base_addr;
3950 int channel, chip, index;
3951 unsigned long tmp;
3952
3953 card = info->card;
3954 channel = info->line - card->first_line;
3955 if (!IS_CYC_Z(*card)) {
3956 chip = channel >> 2;
3957 channel &= 0x03;
3958 index = card->bus_index;
3959 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3960
3961 tmp = readb(base_addr + (CyRTPR << index));
3962 return put_user(tmp, value);
3963 } else {
3964 /* Nothing to do! */
3965 return 0;
3966 }
3967 } /* get_timeout */
3968
3969 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3970 {
3971 info->default_timeout = value & 0xff;
3972 return 0;
3973 } /* set_default_timeout */
3974
3975 static int
3976 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3977 {
3978 return put_user(info->default_timeout, value);
3979 } /* get_default_timeout */
3980
3981 /*
3982 * This routine allows the tty driver to implement device-
3983 * specific ioctl's. If the ioctl number passed in cmd is
3984 * not recognized by the driver, it should return ENOIOCTLCMD.
3985 */
3986 static int
3987 cy_ioctl(struct tty_struct *tty, struct file *file,
3988 unsigned int cmd, unsigned long arg)
3989 {
3990 struct cyclades_port *info = tty->driver_data;
3991 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3992 struct serial_icounter_struct __user *p_cuser; /* user space */
3993 int ret_val = 0;
3994 unsigned long flags;
3995 void __user *argp = (void __user *)arg;
3996
3997 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3998 return -ENODEV;
3999
4000 #ifdef CY_DEBUG_OTHER
4001 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
4002 info->line, cmd, arg);
4003 #endif
4004
4005 switch (cmd) {
4006 case CYGETMON:
4007 ret_val = get_mon_info(info, argp);
4008 break;
4009 case CYGETTHRESH:
4010 ret_val = get_threshold(info, argp);
4011 break;
4012 case CYSETTHRESH:
4013 ret_val = set_threshold(info, arg);
4014 break;
4015 case CYGETDEFTHRESH:
4016 ret_val = get_default_threshold(info, argp);
4017 break;
4018 case CYSETDEFTHRESH:
4019 ret_val = set_default_threshold(info, arg);
4020 break;
4021 case CYGETTIMEOUT:
4022 ret_val = get_timeout(info, argp);
4023 break;
4024 case CYSETTIMEOUT:
4025 ret_val = set_timeout(info, arg);
4026 break;
4027 case CYGETDEFTIMEOUT:
4028 ret_val = get_default_timeout(info, argp);
4029 break;
4030 case CYSETDEFTIMEOUT:
4031 ret_val = set_default_timeout(info, arg);
4032 break;
4033 case CYSETRFLOW:
4034 info->rflow = (int)arg;
4035 ret_val = 0;
4036 break;
4037 case CYGETRFLOW:
4038 ret_val = info->rflow;
4039 break;
4040 case CYSETRTSDTR_INV:
4041 info->rtsdtr_inv = (int)arg;
4042 ret_val = 0;
4043 break;
4044 case CYGETRTSDTR_INV:
4045 ret_val = info->rtsdtr_inv;
4046 break;
4047 case CYGETCD1400VER:
4048 ret_val = info->chip_rev;
4049 break;
4050 #ifndef CONFIG_CYZ_INTR
4051 case CYZSETPOLLCYCLE:
4052 cyz_polling_cycle = (arg * HZ) / 1000;
4053 ret_val = 0;
4054 break;
4055 case CYZGETPOLLCYCLE:
4056 ret_val = (cyz_polling_cycle * 1000) / HZ;
4057 break;
4058 #endif /* CONFIG_CYZ_INTR */
4059 case CYSETWAIT:
4060 info->closing_wait = (unsigned short)arg *HZ / 100;
4061 ret_val = 0;
4062 break;
4063 case CYGETWAIT:
4064 ret_val = info->closing_wait / (HZ / 100);
4065 break;
4066 case TIOCGSERIAL:
4067 ret_val = get_serial_info(info, argp);
4068 break;
4069 case TIOCSSERIAL:
4070 ret_val = set_serial_info(info, argp);
4071 break;
4072 case TIOCSERGETLSR: /* Get line status register */
4073 ret_val = get_lsr_info(info, argp);
4074 break;
4075 /*
4076 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4077 * - mask passed in arg for lines of interest
4078 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4079 * Caller should use TIOCGICOUNT to see which one it was
4080 */
4081 case TIOCMIWAIT:
4082 CY_LOCK(info, flags);
4083 /* note the counters on entry */
4084 cnow = info->icount;
4085 CY_UNLOCK(info, flags);
4086 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4087 cprev = cnow;
4088 CY_LOCK(info, flags);
4089 cnow = info->icount; /* atomic copy */
4090 CY_UNLOCK(info, flags);
4091
4092 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4093 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4094 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4095 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4096 }));
4097 break;
4098
4099 /*
4100 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4101 * Return: write counters to the user passed counter struct
4102 * NB: both 1->0 and 0->1 transitions are counted except for
4103 * RI where only 0->1 is counted.
4104 */
4105 case TIOCGICOUNT:
4106 CY_LOCK(info, flags);
4107 cnow = info->icount;
4108 CY_UNLOCK(info, flags);
4109 p_cuser = argp;
4110 ret_val = put_user(cnow.cts, &p_cuser->cts);
4111 if (ret_val)
4112 return ret_val;
4113 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4114 if (ret_val)
4115 return ret_val;
4116 ret_val = put_user(cnow.rng, &p_cuser->rng);
4117 if (ret_val)
4118 return ret_val;
4119 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4120 if (ret_val)
4121 return ret_val;
4122 ret_val = put_user(cnow.rx, &p_cuser->rx);
4123 if (ret_val)
4124 return ret_val;
4125 ret_val = put_user(cnow.tx, &p_cuser->tx);
4126 if (ret_val)
4127 return ret_val;
4128 ret_val = put_user(cnow.frame, &p_cuser->frame);
4129 if (ret_val)
4130 return ret_val;
4131 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4132 if (ret_val)
4133 return ret_val;
4134 ret_val = put_user(cnow.parity, &p_cuser->parity);
4135 if (ret_val)
4136 return ret_val;
4137 ret_val = put_user(cnow.brk, &p_cuser->brk);
4138 if (ret_val)
4139 return ret_val;
4140 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4141 if (ret_val)
4142 return ret_val;
4143 ret_val = 0;
4144 break;
4145 default:
4146 ret_val = -ENOIOCTLCMD;
4147 }
4148
4149 #ifdef CY_DEBUG_OTHER
4150 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4151 #endif
4152
4153 return ret_val;
4154 } /* cy_ioctl */
4155
4156 /*
4157 * This routine allows the tty driver to be notified when
4158 * device's termios settings have changed. Note that a
4159 * well-designed tty driver should be prepared to accept the case
4160 * where old == NULL, and try to do something rational.
4161 */
4162 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4163 {
4164 struct cyclades_port *info = tty->driver_data;
4165
4166 #ifdef CY_DEBUG_OTHER
4167 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4168 #endif
4169
4170 if (tty->termios->c_cflag == old_termios->c_cflag &&
4171 (tty->termios->c_iflag & (IXON | IXANY)) ==
4172 (old_termios->c_iflag & (IXON | IXANY)))
4173 return;
4174 set_line_char(info);
4175
4176 if ((old_termios->c_cflag & CRTSCTS) &&
4177 !(tty->termios->c_cflag & CRTSCTS)) {
4178 tty->hw_stopped = 0;
4179 cy_start(tty);
4180 }
4181 #if 0
4182 /*
4183 * No need to wake up processes in open wait, since they
4184 * sample the CLOCAL flag once, and don't recheck it.
4185 * XXX It's not clear whether the current behavior is correct
4186 * or not. Hence, this may change.....
4187 */
4188 if (!(old_termios->c_cflag & CLOCAL) &&
4189 (tty->termios->c_cflag & CLOCAL))
4190 wake_up_interruptible(&info->open_wait);
4191 #endif
4192 } /* cy_set_termios */
4193
4194 /* This function is used to send a high-priority XON/XOFF character to
4195 the device.
4196 */
4197 static void cy_send_xchar(struct tty_struct *tty, char ch)
4198 {
4199 struct cyclades_port *info = tty->driver_data;
4200 struct cyclades_card *card;
4201 int channel;
4202
4203 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4204 return;
4205
4206 info->x_char = ch;
4207
4208 if (ch)
4209 cy_start(tty);
4210
4211 card = info->card;
4212 channel = info->line - card->first_line;
4213
4214 if (IS_CYC_Z(*card)) {
4215 if (ch == STOP_CHAR(tty))
4216 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4217 else if (ch == START_CHAR(tty))
4218 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4219 }
4220 }
4221
4222 /* This routine is called by the upper-layer tty layer to signal
4223 that incoming characters should be throttled because the input
4224 buffers are close to full.
4225 */
4226 static void cy_throttle(struct tty_struct *tty)
4227 {
4228 struct cyclades_port *info = tty->driver_data;
4229 struct cyclades_card *card;
4230 unsigned long flags;
4231 void __iomem *base_addr;
4232 int chip, channel, index;
4233
4234 #ifdef CY_DEBUG_THROTTLE
4235 char buf[64];
4236
4237 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4238 tty->ldisc.chars_in_buffer(tty), info->line);
4239 #endif
4240
4241 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4242 return;
4243 }
4244
4245 card = info->card;
4246
4247 if (I_IXOFF(tty)) {
4248 if (!IS_CYC_Z(*card))
4249 cy_send_xchar(tty, STOP_CHAR(tty));
4250 else
4251 info->throttle = 1;
4252 }
4253
4254 if (tty->termios->c_cflag & CRTSCTS) {
4255 channel = info->line - card->first_line;
4256 if (!IS_CYC_Z(*card)) {
4257 chip = channel >> 2;
4258 channel &= 0x03;
4259 index = card->bus_index;
4260 base_addr = card->base_addr +
4261 (cy_chip_offset[chip] << index);
4262
4263 CY_LOCK(info, flags);
4264 cy_writeb(base_addr + (CyCAR << index),
4265 (u_char) channel);
4266 if (info->rtsdtr_inv) {
4267 cy_writeb(base_addr + (CyMSVR2 << index),
4268 ~CyDTR);
4269 } else {
4270 cy_writeb(base_addr + (CyMSVR1 << index),
4271 ~CyRTS);
4272 }
4273 CY_UNLOCK(info, flags);
4274 } else {
4275 info->throttle = 1;
4276 }
4277 }
4278 } /* cy_throttle */
4279
4280 /*
4281 * This routine notifies the tty driver that it should signal
4282 * that characters can now be sent to the tty without fear of
4283 * overrunning the input buffers of the line disciplines.
4284 */
4285 static void cy_unthrottle(struct tty_struct *tty)
4286 {
4287 struct cyclades_port *info = tty->driver_data;
4288 struct cyclades_card *card;
4289 unsigned long flags;
4290 void __iomem *base_addr;
4291 int chip, channel, index;
4292
4293 #ifdef CY_DEBUG_THROTTLE
4294 char buf[64];
4295
4296 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4297 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
4298 #endif
4299
4300 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4301 return;
4302 }
4303
4304 if (I_IXOFF(tty)) {
4305 if (info->x_char)
4306 info->x_char = 0;
4307 else
4308 cy_send_xchar(tty, START_CHAR(tty));
4309 }
4310
4311 if (tty->termios->c_cflag & CRTSCTS) {
4312 card = info->card;
4313 channel = info->line - card->first_line;
4314 if (!IS_CYC_Z(*card)) {
4315 chip = channel >> 2;
4316 channel &= 0x03;
4317 index = card->bus_index;
4318 base_addr = card->base_addr +
4319 (cy_chip_offset[chip] << index);
4320
4321 CY_LOCK(info, flags);
4322 cy_writeb(base_addr + (CyCAR << index),
4323 (u_char) channel);
4324 if (info->rtsdtr_inv) {
4325 cy_writeb(base_addr + (CyMSVR2 << index),
4326 CyDTR);
4327 } else {
4328 cy_writeb(base_addr + (CyMSVR1 << index),
4329 CyRTS);
4330 }
4331 CY_UNLOCK(info, flags);
4332 } else {
4333 info->throttle = 0;
4334 }
4335 }
4336 } /* cy_unthrottle */
4337
4338 /* cy_start and cy_stop provide software output flow control as a
4339 function of XON/XOFF, software CTS, and other such stuff.
4340 */
4341 static void cy_stop(struct tty_struct *tty)
4342 {
4343 struct cyclades_card *cinfo;
4344 struct cyclades_port *info = tty->driver_data;
4345 void __iomem *base_addr;
4346 int chip, channel, index;
4347 unsigned long flags;
4348
4349 #ifdef CY_DEBUG_OTHER
4350 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4351 #endif
4352
4353 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4354 return;
4355
4356 cinfo = info->card;
4357 channel = info->line - cinfo->first_line;
4358 if (!IS_CYC_Z(*cinfo)) {
4359 index = cinfo->bus_index;
4360 chip = channel >> 2;
4361 channel &= 0x03;
4362 base_addr = info->card->base_addr +
4363 (cy_chip_offset[chip] << index);
4364
4365 CY_LOCK(info, flags);
4366 cy_writeb(base_addr + (CyCAR << index),
4367 (u_char)(channel & 0x0003)); /* index channel */
4368 cy_writeb(base_addr + (CySRER << index),
4369 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4370 CY_UNLOCK(info, flags);
4371 } else {
4372 /* Nothing to do! */
4373 }
4374 } /* cy_stop */
4375
4376 static void cy_start(struct tty_struct *tty)
4377 {
4378 struct cyclades_card *cinfo;
4379 struct cyclades_port *info = tty->driver_data;
4380 void __iomem *base_addr;
4381 int chip, channel, index;
4382 unsigned long flags;
4383
4384 #ifdef CY_DEBUG_OTHER
4385 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4386 #endif
4387
4388 if (serial_paranoia_check(info, tty->name, "cy_start"))
4389 return;
4390
4391 cinfo = info->card;
4392 channel = info->line - cinfo->first_line;
4393 index = cinfo->bus_index;
4394 if (!IS_CYC_Z(*cinfo)) {
4395 chip = channel >> 2;
4396 channel &= 0x03;
4397 base_addr = info->card->base_addr +
4398 (cy_chip_offset[chip] << index);
4399
4400 CY_LOCK(info, flags);
4401 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4402 cy_writeb(base_addr + (CySRER << index),
4403 readb(base_addr + (CySRER << index)) | CyTxRdy);
4404 CY_UNLOCK(info, flags);
4405 } else {
4406 /* Nothing to do! */
4407 }
4408 } /* cy_start */
4409
4410 static void cy_flush_buffer(struct tty_struct *tty)
4411 {
4412 struct cyclades_port *info = tty->driver_data;
4413 struct cyclades_card *card;
4414 int channel, retval;
4415 unsigned long flags;
4416
4417 #ifdef CY_DEBUG_IO
4418 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4419 #endif
4420
4421 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4422 return;
4423
4424 card = info->card;
4425 channel = info->line - card->first_line;
4426
4427 CY_LOCK(info, flags);
4428 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4429 CY_UNLOCK(info, flags);
4430
4431 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
4432 buffers as well */
4433 CY_LOCK(info, flags);
4434 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4435 if (retval != 0) {
4436 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4437 "was %x\n", info->line, retval);
4438 }
4439 CY_UNLOCK(info, flags);
4440 }
4441 tty_wakeup(tty);
4442 } /* cy_flush_buffer */
4443
4444 /*
4445 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4446 */
4447 static void cy_hangup(struct tty_struct *tty)
4448 {
4449 struct cyclades_port *info = tty->driver_data;
4450
4451 #ifdef CY_DEBUG_OTHER
4452 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4453 #endif
4454
4455 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4456 return;
4457
4458 cy_flush_buffer(tty);
4459 shutdown(info);
4460 info->event = 0;
4461 info->count = 0;
4462 #ifdef CY_DEBUG_COUNT
4463 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4464 current->pid);
4465 #endif
4466 info->tty = NULL;
4467 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4468 wake_up_interruptible(&info->open_wait);
4469 } /* cy_hangup */
4470
4471 /*
4472 * ---------------------------------------------------------------------
4473 * cy_init() and friends
4474 *
4475 * cy_init() is called at boot-time to initialize the serial driver.
4476 * ---------------------------------------------------------------------
4477 */
4478
4479 static void __devinit cy_init_card(struct cyclades_card *cinfo)
4480 {
4481 struct cyclades_port *info;
4482 u32 mailbox;
4483 unsigned int nports;
4484 unsigned short chip_number;
4485 int index, port;
4486
4487 spin_lock_init(&cinfo->card_lock);
4488
4489 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4490 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4491 cinfo->ctl_addr)->mail_box_0);
4492 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4493 cinfo->intr_enabled = 0;
4494 cinfo->nports = 0; /* Will be correctly set later, after
4495 Z FW is loaded */
4496 } else {
4497 index = cinfo->bus_index;
4498 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4499 }
4500
4501 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4502 port++) {
4503 info = &cy_port[port];
4504 memset(info, 0, sizeof(*info));
4505 info->magic = CYCLADES_MAGIC;
4506 info->card = cinfo;
4507 info->line = port;
4508 info->flags = STD_COM_FLAGS;
4509 info->closing_wait = CLOSING_WAIT_DELAY;
4510 info->close_delay = 5 * HZ / 10;
4511
4512 INIT_WORK(&info->tqueue, do_softint);
4513 init_waitqueue_head(&info->open_wait);
4514 init_waitqueue_head(&info->close_wait);
4515 init_completion(&info->shutdown_wait);
4516 init_waitqueue_head(&info->delta_msr_wait);
4517
4518 if (IS_CYC_Z(*cinfo)) {
4519 info->type = PORT_STARTECH;
4520 if (mailbox == ZO_V1)
4521 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4522 else
4523 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4524 #ifdef CONFIG_CYZ_INTR
4525 setup_timer(&cyz_rx_full_timer[port],
4526 cyz_rx_restart, (unsigned long)info);
4527 #endif
4528 } else {
4529 info->type = PORT_CIRRUS;
4530 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4531 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4532 info->cor2 = CyETC;
4533 info->cor3 = 0x08; /* _very_ small rcv threshold */
4534
4535 chip_number = (port - cinfo->first_line) / 4;
4536 if ((info->chip_rev = readb(cinfo->base_addr +
4537 (cy_chip_offset[chip_number] <<
4538 index) + (CyGFRCR << index))) >=
4539 CD1400_REV_J) {
4540 /* It is a CD1400 rev. J or later */
4541 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4542 info->tco = baud_co_60[13]; /* Tx CO */
4543 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4544 info->rco = baud_co_60[13]; /* Rx CO */
4545 info->rtsdtr_inv = 1;
4546 } else {
4547 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4548 info->tco = baud_co_25[13]; /* Tx CO */
4549 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4550 info->rco = baud_co_25[13]; /* Rx CO */
4551 info->rtsdtr_inv = 0;
4552 }
4553 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4554 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4555 }
4556
4557 }
4558
4559 #ifndef CONFIG_CYZ_INTR
4560 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4561 mod_timer(&cyz_timerlist, jiffies + 1);
4562 #ifdef CY_PCI_DEBUG
4563 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4564 #endif
4565 }
4566 #endif
4567 }
4568
4569 /* initialize chips on Cyclom-Y card -- return number of valid
4570 chips (which is number of ports/4) */
4571 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4572 int index)
4573 {
4574 unsigned int chip_number;
4575 void __iomem *base_addr;
4576
4577 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4578 /* Cy_HwReset is 0x1400 */
4579 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4580 /* Cy_ClrIntr is 0x1800 */
4581 udelay(500L);
4582
4583 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4584 base_addr =
4585 true_base_addr + (cy_chip_offset[chip_number] << index);
4586 mdelay(1);
4587 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4588 /*************
4589 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4590 chip_number, (unsigned long)base_addr);
4591 *************/
4592 return chip_number;
4593 }
4594
4595 cy_writeb(base_addr + (CyGFRCR << index), 0);
4596 udelay(10L);
4597
4598 /* The Cyclom-16Y does not decode address bit 9 and therefore
4599 cannot distinguish between references to chip 0 and a non-
4600 existent chip 4. If the preceding clearing of the supposed
4601 chip 4 GFRCR register appears at chip 0, there is no chip 4
4602 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4603 */
4604 if (chip_number == 4 && readb(true_base_addr +
4605 (cy_chip_offset[0] << index) +
4606 (CyGFRCR << index)) == 0) {
4607 return chip_number;
4608 }
4609
4610 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4611 mdelay(1);
4612
4613 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4614 /*
4615 printk(" chip #%d at %#6lx is not responding ",
4616 chip_number, (unsigned long)base_addr);
4617 printk("(GFRCR stayed 0)\n",
4618 */
4619 return chip_number;
4620 }
4621 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4622 0x40) {
4623 /*
4624 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4625 "%#2x)\n",
4626 chip_number, (unsigned long)base_addr,
4627 base_addr[CyGFRCR<<index]);
4628 */
4629 return chip_number;
4630 }
4631 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4632 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4633 /* It is a CD1400 rev. J or later */
4634 /* Impossible to reach 5ms with this chip.
4635 Changed to 2ms instead (f = 500 Hz). */
4636 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4637 } else {
4638 /* f = 200 Hz */
4639 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4640 }
4641
4642 /*
4643 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4644 chip_number, (unsigned long)base_addr,
4645 readb(base_addr+(CyGFRCR<<index)));
4646 */
4647 }
4648 return chip_number;
4649 } /* cyy_init_card */
4650
4651 /*
4652 * ---------------------------------------------------------------------
4653 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4654 * sets global variables and return the number of ISA boards found.
4655 * ---------------------------------------------------------------------
4656 */
4657 static int __init cy_detect_isa(void)
4658 {
4659 #ifdef CONFIG_ISA
4660 unsigned short cy_isa_irq, nboard;
4661 void __iomem *cy_isa_address;
4662 unsigned short i, j, cy_isa_nchan;
4663 #ifdef MODULE
4664 int isparam = 0;
4665 #endif
4666
4667 nboard = 0;
4668
4669 #ifdef MODULE
4670 /* Check for module parameters */
4671 for (i = 0; i < NR_CARDS; i++) {
4672 if (maddr[i] || i) {
4673 isparam = 1;
4674 cy_isa_addresses[i] = maddr[i];
4675 }
4676 if (!maddr[i])
4677 break;
4678 }
4679 #endif
4680
4681 /* scan the address table probing for Cyclom-Y/ISA boards */
4682 for (i = 0; i < NR_ISA_ADDRS; i++) {
4683 unsigned int isa_address = cy_isa_addresses[i];
4684 if (isa_address == 0x0000) {
4685 return nboard;
4686 }
4687
4688 /* probe for CD1400... */
4689 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4690 cy_isa_nchan = CyPORTS_PER_CHIP *
4691 cyy_init_card(cy_isa_address, 0);
4692 if (cy_isa_nchan == 0) {
4693 continue;
4694 }
4695 #ifdef MODULE
4696 if (isparam && irq[i])
4697 cy_isa_irq = irq[i];
4698 else
4699 #endif
4700 /* find out the board's irq by probing */
4701 cy_isa_irq = detect_isa_irq(cy_isa_address);
4702 if (cy_isa_irq == 0) {
4703 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4704 "IRQ could not be detected.\n",
4705 (unsigned long)cy_isa_address);
4706 continue;
4707 }
4708
4709 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4710 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4711 "more channels are available. Change NR_PORTS "
4712 "in cyclades.c and recompile kernel.\n",
4713 (unsigned long)cy_isa_address);
4714 return nboard;
4715 }
4716 /* fill the next cy_card structure available */
4717 for (j = 0; j < NR_CARDS; j++) {
4718 if (cy_card[j].base_addr == 0)
4719 break;
4720 }
4721 if (j == NR_CARDS) { /* no more cy_cards available */
4722 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4723 "more cards can be used. Change NR_CARDS in "
4724 "cyclades.c and recompile kernel.\n",
4725 (unsigned long)cy_isa_address);
4726 return nboard;
4727 }
4728
4729 /* allocate IRQ */
4730 if (request_irq(cy_isa_irq, cyy_interrupt,
4731 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4732 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4733 "could not allocate IRQ#%d.\n",
4734 (unsigned long)cy_isa_address, cy_isa_irq);
4735 return nboard;
4736 }
4737
4738 /* set cy_card */
4739 cy_card[j].base_addr = cy_isa_address;
4740 cy_card[j].ctl_addr = NULL;
4741 cy_card[j].irq = (int)cy_isa_irq;
4742 cy_card[j].bus_index = 0;
4743 cy_card[j].first_line = cy_next_channel;
4744 cy_card[j].num_chips = cy_isa_nchan / 4;
4745 cy_init_card(&cy_card[j]);
4746 nboard++;
4747
4748 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4749 "%d channels starting from port %d\n",
4750 j + 1, (unsigned long)cy_isa_address,
4751 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4752 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4753
4754 for (j = cy_next_channel;
4755 j < cy_next_channel + cy_isa_nchan; j++)
4756 tty_register_device(cy_serial_driver, j, NULL);
4757 cy_next_channel += cy_isa_nchan;
4758 }
4759 return nboard;
4760 #else
4761 return 0;
4762 #endif /* CONFIG_ISA */
4763 } /* cy_detect_isa */
4764
4765 #ifdef CONFIG_PCI
4766 static void __devinit plx_init(void __iomem * addr, __u32 initctl)
4767 {
4768 /* Reset PLX */
4769 cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
4770 udelay(100L);
4771 cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
4772
4773 /* Reload Config. Registers from EEPROM */
4774 cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
4775 udelay(100L);
4776 cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
4777 }
4778
4779 static int __devinit cy_init_Ze(struct RUNTIME_9060 __iomem *cy_pci_addr0,
4780 int cy_pci_irq, struct pci_dev *pdev)
4781 {
4782 void __iomem *cy_pci_addr2;
4783 unsigned int j;
4784 unsigned short cy_pci_nchan;
4785
4786 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ze_win);
4787
4788 readl(&cy_pci_addr0->mail_box_0);
4789 dev_dbg(&pdev->dev, "new Cyclades-Z board. FPGA not loaded\n");
4790
4791 /* This must be the new Cyclades-Ze/PCI. */
4792 cy_pci_nchan = ZE_V1_NPORTS;
4793
4794 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4795 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no channels "
4796 "are available.\nChange NR_PORTS in cyclades.c "
4797 "and recompile kernel.\n");
4798 return -EIO;
4799 }
4800
4801 /* fill the next cy_card structure available */
4802 for (j = 0; j < NR_CARDS; j++) {
4803 if (cy_card[j].base_addr == 0)
4804 break;
4805 }
4806 if (j == NR_CARDS) { /* no more cy_cards available */
4807 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no more "
4808 "cards can be used.\nChange NR_CARDS in "
4809 "cyclades.c and recompile kernel.\n");
4810 return -EIO;
4811 }
4812 #ifdef CONFIG_CYZ_INTR
4813 /* allocate IRQ only if board has an IRQ */
4814 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
4815 if (request_irq(cy_pci_irq, cyz_interrupt,
4816 IRQF_SHARED, "Cyclades-Z",
4817 &cy_card[j])) {
4818 dev_err(&pdev->dev, "could not allocate IRQ.\n");
4819 return -EIO;
4820 }
4821 }
4822 #endif /* CONFIG_CYZ_INTR */
4823
4824 /* set cy_card */
4825 cy_card[j].base_addr = cy_pci_addr2;
4826 cy_card[j].ctl_addr = cy_pci_addr0;
4827 cy_card[j].irq = cy_pci_irq;
4828 cy_card[j].bus_index = 1;
4829 cy_card[j].first_line = cy_next_channel;
4830 cy_card[j].num_chips = -1;
4831 cy_init_card(&cy_card[j]);
4832 pci_set_drvdata(pdev, &cy_card[j]);
4833
4834 dev_info(&pdev->dev, "Cyclades-Ze/PCI #%d found: %d channels starting "
4835 "from port %d.\n", j + 1, cy_pci_nchan, cy_next_channel);
4836
4837 for (j = cy_next_channel; j < cy_next_channel + cy_pci_nchan; j++)
4838 tty_register_device(cy_serial_driver, j, &pdev->dev);
4839 cy_next_channel += cy_pci_nchan;
4840
4841 return 0;
4842 }
4843
4844 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4845 const struct pci_device_id *ent)
4846 {
4847 unsigned char cyy_rev_id;
4848 int cy_pci_irq;
4849 __u32 mailbox;
4850 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4851 unsigned int device_id;
4852 unsigned short j, cy_pci_nchan, plx_ver;
4853 int retval;
4854
4855 retval = pci_enable_device(pdev);
4856 if (retval) {
4857 dev_err(&pdev->dev, "cannot enable device\n");
4858 return retval;
4859 }
4860
4861 /* read PCI configuration area */
4862 cy_pci_irq = pdev->irq;
4863 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4864
4865 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4866
4867 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4868 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4869 dev_dbg(&pdev->dev, "Cyclom-Y/PCI found\n");
4870
4871 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4872 dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
4873 "set. Ignoring it...\n");
4874 pdev->resource[2].flags &= ~IORESOURCE_IO;
4875 }
4876
4877 /* Although we don't use this I/O region, we should
4878 request it from the kernel anyway, to avoid problems
4879 with other drivers accessing it. */
4880 retval = pci_request_regions(pdev, "Cyclom-Y");
4881 if (retval) {
4882 dev_err(&pdev->dev, "failed to reserve resources\n");
4883 return retval;
4884 }
4885 #if defined(__alpha__)
4886 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4887 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for "
4888 "low addresses on Alpha systems.\n");
4889 return -EIO;
4890 }
4891 #endif
4892 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4893 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
4894
4895 dev_dbg(&pdev->dev, "Cyclom-Y/PCI: relocate winaddr=0x%p "
4896 "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
4897
4898 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4899 cyy_init_card(cy_pci_addr2, 1));
4900 if (cy_pci_nchan == 0) {
4901 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
4902 "Serial-Modules\n");
4903 return -EIO;
4904 }
4905 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4906 dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no "
4907 "channels are available. Change NR_PORTS in "
4908 "cyclades.c and recompile kernel.\n");
4909 return -EIO;
4910 }
4911 /* fill the next cy_card structure available */
4912 for (j = 0; j < NR_CARDS; j++) {
4913 if (cy_card[j].base_addr == 0)
4914 break;
4915 }
4916 if (j == NR_CARDS) { /* no more cy_cards available */
4917 dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no more "
4918 "cards can be used. Change NR_CARDS in "
4919 "cyclades.c and recompile kernel.\n");
4920 return -EIO;
4921 }
4922
4923 /* allocate IRQ */
4924 retval = request_irq(cy_pci_irq, cyy_interrupt,
4925 IRQF_SHARED, "Cyclom-Y", &cy_card[j]);
4926 if (retval) {
4927 dev_err(&pdev->dev, "could not allocate IRQ\n");
4928 return retval;
4929 }
4930
4931 /* set cy_card */
4932 cy_card[j].base_addr = cy_pci_addr2;
4933 cy_card[j].ctl_addr = cy_pci_addr0;
4934 cy_card[j].irq = cy_pci_irq;
4935 cy_card[j].bus_index = 1;
4936 cy_card[j].first_line = cy_next_channel;
4937 cy_card[j].num_chips = cy_pci_nchan / 4;
4938 cy_init_card(&cy_card[j]);
4939 pci_set_drvdata(pdev, &cy_card[j]);
4940
4941 /* enable interrupts in the PCI interface */
4942 plx_ver = readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4943 switch (plx_ver) {
4944 case PLX_9050:
4945
4946 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4947 break;
4948
4949 case PLX_9060:
4950 case PLX_9080:
4951 default: /* Old boards, use PLX_9060 */
4952
4953 plx_init(cy_pci_addr0, 0x6c);
4954 /* For some yet unknown reason, once the PLX9060 reloads
4955 the EEPROM, the IRQ is lost and, thus, we have to
4956 re-write it to the PCI config. registers.
4957 This will remain here until we find a permanent
4958 fix. */
4959 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4960 cy_pci_irq);
4961
4962 cy_writew(cy_pci_addr0 + 0x68,
4963 readw(cy_pci_addr0 + 0x68) | 0x0900);
4964 break;
4965 }
4966
4967 dev_info(&pdev->dev, "Cyclom-Y/PCI #%d found: %d channels "
4968 "starting from port %d.\n", j + 1, cy_pci_nchan,
4969 cy_next_channel);
4970
4971 for (j = cy_next_channel;
4972 j < cy_next_channel + cy_pci_nchan; j++)
4973 tty_register_device(cy_serial_driver, j, &pdev->dev);
4974
4975 cy_next_channel += cy_pci_nchan;
4976 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4977 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for "
4978 "low addresses\n");
4979 return -EIO;
4980 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4981 dev_dbg(&pdev->dev, "Cyclades-Z/PCI found\n");
4982
4983 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
4984
4985 /* Disable interrupts on the PLX before resetting it */
4986 cy_writew(cy_pci_addr0 + 0x68,
4987 readw(cy_pci_addr0 + 0x68) & ~0x0900);
4988
4989 plx_init(cy_pci_addr0, 0x6c);
4990 /* For some yet unknown reason, once the PLX9060 reloads
4991 the EEPROM, the IRQ is lost and, thus, we have to
4992 re-write it to the PCI config. registers.
4993 This will remain here until we find a permanent
4994 fix. */
4995 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
4996
4997 mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
4998 cy_pci_addr0)->mail_box_0);
4999
5000 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
5001 dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
5002 "set. Ignoring it...\n");
5003 pdev->resource[2].flags &= ~IORESOURCE_IO;
5004 }
5005
5006 /* Although we don't use this I/O region, we should
5007 request it from the kernel anyway, to avoid problems
5008 with other drivers accessing it. */
5009 retval = pci_request_regions(pdev, "Cyclades-Z");
5010 if (retval) {
5011 dev_err(&pdev->dev, "failed to reserve resources\n");
5012 return retval;
5013 }
5014
5015 if (mailbox == ZE_V1) {
5016 retval = cy_init_Ze(cy_pci_addr0, cy_pci_irq, pdev);
5017 return retval;
5018 } else {
5019 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Zwin);
5020 }
5021
5022 dev_dbg(&pdev->dev, "Cyclades-Z/PCI: relocate winaddr=0x%p "
5023 "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
5024 #ifdef CY_PCI_DEBUG
5025 if (mailbox == ZO_V1) {
5026 cy_writel(&((struct RUNTIME_9060 *)
5027 (cy_pci_addr0))->loc_addr_base,
5028 WIN_CREG);
5029 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA id %lx, "
5030 "ver %lx\n", (ulong)(0xff &
5031 readl(&((struct CUSTOM_REG *)
5032 cy_pci_addr2)->fpga_id)),
5033 (ulong)(0xff & readl(&((struct CUSTOM_REG *)
5034 cy_pci_addr2)->fpga_version)));
5035 cy_writel(&((struct RUNTIME_9060 *)
5036 cy_pci_addr0)->loc_addr_base, WIN_RAM);
5037 } else {
5038 dev_info(&pdev->dev, "Cyclades-Z/PCI: New Cyclades-Z "
5039 "board. FPGA not loaded\n");
5040 }
5041 #endif
5042 /* The following clears the firmware id word. This
5043 ensures that the driver will not attempt to talk to
5044 the board until it has been properly initialized.
5045 */
5046 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5047 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5048
5049 /* This must be a Cyclades-8Zo/PCI. The extendable
5050 version will have a different device_id and will
5051 be allocated its maximum number of ports. */
5052 cy_pci_nchan = 8;
5053
5054 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5055 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5056 "channels are available. Change NR_PORTS in "
5057 "cyclades.c and recompile kernel.\n");
5058 return -EIO;
5059 }
5060
5061 /* fill the next cy_card structure available */
5062 for (j = 0; j < NR_CARDS; j++) {
5063 if (cy_card[j].base_addr == 0)
5064 break;
5065 }
5066 if (j == NR_CARDS) { /* no more cy_cards available */
5067 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5068 "more cards can be used. Change NR_CARDS in "
5069 "cyclades.c and recompile kernel.\n");
5070 return -EIO;
5071 }
5072 #ifdef CONFIG_CYZ_INTR
5073 /* allocate IRQ only if board has an IRQ */
5074 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5075 retval = request_irq(cy_pci_irq, cyz_interrupt,
5076 IRQF_SHARED, "Cyclades-Z",
5077 &cy_card[j]);
5078 if (retval) {
5079 dev_err(&pdev->dev, "could not allocate IRQ\n");
5080 return retval;
5081 }
5082 }
5083 #endif /* CONFIG_CYZ_INTR */
5084
5085 /* set cy_card */
5086 cy_card[j].base_addr = cy_pci_addr2;
5087 cy_card[j].ctl_addr = cy_pci_addr0;
5088 cy_card[j].irq = cy_pci_irq;
5089 cy_card[j].bus_index = 1;
5090 cy_card[j].first_line = cy_next_channel;
5091 cy_card[j].num_chips = -1;
5092 cy_init_card(&cy_card[j]);
5093 pci_set_drvdata(pdev, &cy_card[j]);
5094
5095 dev_info(&pdev->dev, "Cyclades-8Zo/PCI #%d found: %d channels "
5096 "starting from port %d.\n", j + 1, cy_pci_nchan,
5097 cy_next_channel);
5098
5099 for (j = cy_next_channel;
5100 j < cy_next_channel + cy_pci_nchan; j++)
5101 tty_register_device(cy_serial_driver, j, &pdev->dev);
5102 cy_next_channel += cy_pci_nchan;
5103 }
5104
5105 return 0;
5106 }
5107
5108 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5109 {
5110 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5111 unsigned int i;
5112
5113 /* non-Z with old PLX */
5114 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5115 PLX_9050)
5116 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5117 else
5118 #ifndef CONFIG_CYZ_INTR
5119 if (!IS_CYC_Z(*cinfo))
5120 #endif
5121 cy_writew(cinfo->ctl_addr + 0x68,
5122 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5123
5124 pci_iounmap(pdev, cinfo->base_addr);
5125 if (cinfo->ctl_addr)
5126 pci_iounmap(pdev, cinfo->ctl_addr);
5127 if (cinfo->irq
5128 #ifndef CONFIG_CYZ_INTR
5129 && !IS_CYC_Z(*cinfo)
5130 #endif /* CONFIG_CYZ_INTR */
5131 )
5132 free_irq(cinfo->irq, cinfo);
5133 pci_release_regions(pdev);
5134
5135 cinfo->base_addr = NULL;
5136 for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
5137 cy_port[i].line = -1;
5138 cy_port[i].magic = -1;
5139 }
5140 for (i = cinfo->first_line; i < cinfo->first_line +
5141 cinfo->nports; i++)
5142 tty_unregister_device(cy_serial_driver, i);
5143 }
5144
5145 static struct pci_driver cy_pci_driver = {
5146 .name = "cyclades",
5147 .id_table = cy_pci_dev_id,
5148 .probe = cy_pci_probe,
5149 .remove = __devexit_p(cy_pci_remove)
5150 };
5151 #endif
5152
5153 static int
5154 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5155 int *eof, void *data)
5156 {
5157 struct cyclades_port *info;
5158 int i;
5159 int len = 0;
5160 off_t begin = 0;
5161 off_t pos = 0;
5162 int size;
5163 __u32 cur_jifs = jiffies;
5164
5165 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5166 "IdleIn Overruns Ldisc\n");
5167
5168 pos += size;
5169 len += size;
5170
5171 /* Output one line for each known port */
5172 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5173 info = &cy_port[i];
5174
5175 if (info->count)
5176 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5177 "%8lu %9lu %6ld\n", info->line,
5178 (cur_jifs - info->idle_stats.in_use) / HZ,
5179 info->idle_stats.xmit_bytes,
5180 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
5181 info->idle_stats.recv_bytes,
5182 (cur_jifs - info->idle_stats.recv_idle) / HZ,
5183 info->idle_stats.overruns,
5184 (long)info->tty->ldisc.num);
5185 else
5186 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5187 "%8lu %9lu %6ld\n",
5188 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5189 len += size;
5190 pos = begin + len;
5191
5192 if (pos < offset) {
5193 len = 0;
5194 begin = pos;
5195 }
5196 if (pos > offset + length)
5197 goto done;
5198 }
5199 *eof = 1;
5200 done:
5201 *start = buf + (offset - begin); /* Start of wanted data */
5202 len -= (offset - begin); /* Start slop */
5203 if (len > length)
5204 len = length; /* Ending slop */
5205 if (len < 0)
5206 len = 0;
5207 return len;
5208 }
5209
5210 /* The serial driver boot-time initialization code!
5211 Hardware I/O ports are mapped to character special devices on a
5212 first found, first allocated manner. That is, this code searches
5213 for Cyclom cards in the system. As each is found, it is probed
5214 to discover how many chips (and thus how many ports) are present.
5215 These ports are mapped to the tty ports 32 and upward in monotonic
5216 fashion. If an 8-port card is replaced with a 16-port card, the
5217 port mapping on a following card will shift.
5218
5219 This approach is different from what is used in the other serial
5220 device driver because the Cyclom is more properly a multiplexer,
5221 not just an aggregation of serial ports on one card.
5222
5223 If there are more cards with more ports than have been
5224 statically allocated above, a warning is printed and the
5225 extra ports are ignored.
5226 */
5227
5228 static const struct tty_operations cy_ops = {
5229 .open = cy_open,
5230 .close = cy_close,
5231 .write = cy_write,
5232 .put_char = cy_put_char,
5233 .flush_chars = cy_flush_chars,
5234 .write_room = cy_write_room,
5235 .chars_in_buffer = cy_chars_in_buffer,
5236 .flush_buffer = cy_flush_buffer,
5237 .ioctl = cy_ioctl,
5238 .throttle = cy_throttle,
5239 .unthrottle = cy_unthrottle,
5240 .set_termios = cy_set_termios,
5241 .stop = cy_stop,
5242 .start = cy_start,
5243 .hangup = cy_hangup,
5244 .break_ctl = cy_break,
5245 .wait_until_sent = cy_wait_until_sent,
5246 .read_proc = cyclades_get_proc_info,
5247 .tiocmget = cy_tiocmget,
5248 .tiocmset = cy_tiocmset,
5249 };
5250
5251 static int __init cy_init(void)
5252 {
5253 unsigned int i, nboards;
5254 int retval = -ENOMEM;
5255
5256 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5257 if (!cy_serial_driver)
5258 goto err;
5259
5260 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5261 __DATE__, __TIME__);
5262
5263 /* Initialize the tty_driver structure */
5264
5265 cy_serial_driver->owner = THIS_MODULE;
5266 cy_serial_driver->driver_name = "cyclades";
5267 cy_serial_driver->name = "ttyC";
5268 cy_serial_driver->major = CYCLADES_MAJOR;
5269 cy_serial_driver->minor_start = 0;
5270 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5271 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5272 cy_serial_driver->init_termios = tty_std_termios;
5273 cy_serial_driver->init_termios.c_cflag =
5274 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5275 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5276 tty_set_operations(cy_serial_driver, &cy_ops);
5277
5278 retval = tty_register_driver(cy_serial_driver);
5279 if (retval) {
5280 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5281 goto err_frtty;
5282 }
5283
5284 for (i = 0; i < NR_PORTS; i++) {
5285 cy_port[i].line = -1;
5286 cy_port[i].magic = -1;
5287 }
5288
5289 /* the code below is responsible to find the boards. Each different
5290 type of board has its own detection routine. If a board is found,
5291 the next cy_card structure available is set by the detection
5292 routine. These functions are responsible for checking the
5293 availability of cy_card and cy_port data structures and updating
5294 the cy_next_channel. */
5295
5296 /* look for isa boards */
5297 nboards = cy_detect_isa();
5298
5299 #ifdef CONFIG_PCI
5300 /* look for pci boards */
5301 retval = pci_register_driver(&cy_pci_driver);
5302 if (retval && !nboards)
5303 goto err_unr;
5304 #endif
5305
5306 return 0;
5307 err_unr:
5308 tty_unregister_driver(cy_serial_driver);
5309 err_frtty:
5310 put_tty_driver(cy_serial_driver);
5311 err:
5312 return retval;
5313 } /* cy_init */
5314
5315 static void __exit cy_cleanup_module(void)
5316 {
5317 int i, e1;
5318
5319 #ifndef CONFIG_CYZ_INTR
5320 del_timer_sync(&cyz_timerlist);
5321 #endif /* CONFIG_CYZ_INTR */
5322
5323 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5324 printk(KERN_ERR "failed to unregister Cyclades serial "
5325 "driver(%d)\n", e1);
5326
5327 put_tty_driver(cy_serial_driver);
5328
5329 #ifdef CONFIG_PCI
5330 pci_unregister_driver(&cy_pci_driver);
5331 #endif
5332
5333 for (i = 0; i < NR_CARDS; i++) {
5334 if (cy_card[i].base_addr) {
5335 /* clear interrupt */
5336 cy_writeb(cy_card[i].base_addr + Cy_ClrIntr, 0);
5337 iounmap(cy_card[i].base_addr);
5338 if (cy_card[i].ctl_addr)
5339 iounmap(cy_card[i].ctl_addr);
5340 if (cy_card[i].irq
5341 #ifndef CONFIG_CYZ_INTR
5342 && !IS_CYC_Z(cy_card[i])
5343 #endif /* CONFIG_CYZ_INTR */
5344 )
5345 free_irq(cy_card[i].irq, &cy_card[i]);
5346 for (e1 = cy_card[i].first_line;
5347 e1 < cy_card[i].first_line +
5348 cy_card[i].nports; e1++)
5349 tty_unregister_device(cy_serial_driver, e1);
5350 }
5351 }
5352 } /* cy_cleanup_module */
5353
5354 module_init(cy_init);
5355 module_exit(cy_cleanup_module);
5356
5357 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards