3 #undef Z_EXT_CHARS_IN_BUFFER
6 * linux/drivers/char/cyclades.c
8 * This file contains the driver for the Cyclades async multiport
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
14 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
16 * Much of the design and some of the code came from serial.c
17 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
18 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
19 * and then fixed as suggested by Michael K. Johnson 12/12/92.
20 * Converted to pci probing and cleaned up by Jiri Slaby.
22 * This version supports shared IRQ's (only for PCI boards).
24 * Prevent users from opening non-existing Z ports.
26 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
27 * Fixed the PCI detection function to work properly on Alpha systems.
28 * Implemented support for TIOCSERGETLSR ioctl.
29 * Implemented full support for non-standard baud rates.
31 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
32 * Request PLX I/O region, although driver doesn't use it, to avoid
33 * problems with other drivers accessing it.
34 * Removed count for on-board buffer characters in cy_chars_in_buffer
37 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
38 * Driver now reports physical instead of virtual memory addresses.
39 * Masks were added to some Cyclades-Z read accesses.
40 * Implemented workaround for PLX9050 bug that would cause a system lockup
41 * in certain systems, depending on the MMIO addresses allocated to the
43 * Changed the Tx interrupt programming in the CD1400 chips to boost up
44 * performance (Cyclom-Y only).
45 * Code is now compliant with the new module interface (module_[init|exit]).
46 * Make use of the PCI helper functions to access PCI resources.
47 * Did some code "housekeeping".
49 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
50 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
52 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
53 * Fixed SMP locking in Cyclom-Y interrupt handler.
55 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
56 * Added a new cyclades_card field called nports to allow the driver to
57 * know the exact number of ports found by the Z firmware after its load;
58 * RX buffer contention prevention logic on interrupt op mode revisited
60 * Revisited printk's for Z debug;
61 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
63 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
64 * Fixed bug in cyz_poll that would make all ports but port 0
65 * unable to transmit/receive data (Cyclades-Z only);
66 * Implemented logic to prevent the RX buffer from being stuck with data
67 * due to a driver / firmware race condition in interrupt op mode
69 * Fixed bug in block_til_ready logic that would lead to a system crash;
70 * Revisited cy_close spinlock usage;
72 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
73 * Revisited CONFIG_PCI conditional compilation for PCI board support;
74 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
75 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
76 * Removed CTS handling from the driver -- this is now completely handled
77 * by the firmware (Cyclades-Z only);
78 * Flush RX on-board buffers on a port open (Cyclades-Z only);
79 * Fixed handling of ASYNC_SPD_* TTY flags;
80 * Module unload now unmaps all memory area allocated by ioremap;
82 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
83 * Removed CY_PROC conditional compilation;
84 * Implemented SMP-awareness for the driver;
85 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
87 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
88 * (irq=NN) as parameters (only for ISA boards);
89 * Fixed bug in set_line_char that would prevent the Cyclades-Z
90 * ports from being configured at speeds above 115.2Kbps;
91 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
92 * switching from working properly;
93 * The driver now only prints IRQ info for the Cyclades-Z if it's
94 * configured to work in interrupt mode;
96 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
97 * Added support for interrupt mode operation for the Z cards;
98 * Removed the driver inactivity control for the Z;
99 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
100 * the Z firmware is not loaded yet;
101 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
102 * same functionality;
103 * Implemented workaround for IRQ setting loss on the PCI configuration
104 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
106 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
107 * /proc entry location changed to /proc/tty/driver/cyclades;
108 * Added support to shared IRQ's (only for PCI boards);
109 * Added support for Cobalt Qube2 systems;
110 * IRQ [de]allocation scheme revisited;
111 * BREAK implementation changed in order to make use of the 'break_ctl'
113 * Fixed typo in TTY structure field 'driver_name';
114 * Included a PCI bridge reset and EEPROM reload in the board
115 * initialization code (for both Y and Z series).
117 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
118 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
119 * closed properly after a SIGINT;
120 * Module usage counter scheme revisited;
121 * Added support to the upcoming Y PCI boards (i.e., support to additional
124 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
125 * Removed all unnecessary page-alignement operations in ioremap calls
126 * (ioremap is currently safe for these operations).
128 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
129 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
130 * order to make PLX9050-based boards work with certain motherboards.
132 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
133 * cy_close function now resets (correctly) the tty->closing flag;
134 * JIFFIES_DIFF macro fixed.
136 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
137 * Fixed bug in cy_close function, which was not informing HW of
138 * which port should have the reception disabled before doing so;
139 * fixed Cyclom-8YoP hardware detection bug.
141 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
142 * Fixed bug in cy_close function, which causes malfunction
143 * of one of the first 4 ports when a higher port is closed
146 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
147 * Fixed Cyclom-4Yo hardware detection bug.
149 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
150 * /proc/cyclades implementation with great collaboration of
151 * Marc Lewis <marc@blarg.net>;
152 * cyy_interrupt was changed to avoid occurrence of kernel oopses
153 * during PPP operation.
155 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
156 * General code review in order to comply with 2.1 kernel standards;
157 * data loss prevention for slow devices revisited (cy_wait_until_sent
159 * removed conditional compilation for new/old PCI structure support
160 * (now the driver only supports the new PCI structure).
162 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
163 * added conditional compilation for new/old PCI structure support;
164 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
166 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
167 * cleaned up the data loss fix;
168 * fixed XON/XOFF handling once more (Cyclades-Z);
169 * general review of the driver routines;
170 * introduction of a mechanism to prevent data loss with slow
171 * printers, by forcing a delay before closing the port.
173 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
174 * fixed detection/handling of new CD1400 in Ye boards;
175 * fixed XON/XOFF handling (Cyclades-Z);
176 * fixed data loss caused by a premature port close;
177 * introduction of a flag that holds the CD1400 version ID per port
178 * (used by the CYGETCD1400VER new ioctl).
180 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
181 * Code review for the module cleanup routine;
182 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
183 * includes anonymous changes regarding signal_pending.
185 * Revision 2.1 1997/11/01 17:42:41 ivan
186 * Changes in the driver to support Alpha systems (except 8Zo V_1);
187 * BREAK fix for the Cyclades-Z boards;
188 * driver inactivity control by FW implemented;
189 * introduction of flag that allows driver to take advantage of
190 * a special CD1400 feature related to HW flow control;
191 * added support for the CD1400 rev. J (Cyclom-Y boards);
192 * introduction of ioctls to:
193 * - control the rtsdtr_inv flag (Cyclom-Y);
194 * - control the rflow flag (Cyclom-Y);
195 * - adjust the polling interval (Cyclades-Z);
197 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
198 * Fixes related to kernel version conditional
201 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
202 * Compatibility issues between kernels 2.0.x and
203 * 2.1.x (mainly related to clear_bit function).
205 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
206 * Changes to define the memory window according to the
209 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
210 * Changes to support new cycladesZ boards.
212 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
213 * Merge of Bentson's and Daniel's version 1.36.4.28.
214 * Corrects bug in cy_detect_pci: check if there are more
215 * ports than the number of static structs allocated.
216 * Warning message during initialization if this driver is
217 * used with the new generation of cycladesZ boards. Those
218 * will be supported only in next release of the driver.
219 * Corrects bug in cy_detect_pci and cy_detect_isa that
220 * returned wrong number of VALID boards, when a cyclomY
221 * was found with no serial modules connected.
222 * Changes to use current (2.1.x) kernel subroutine names
223 * and created macros for compilation with 2.0.x kernel,
224 * instead of the other way around.
226 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
227 * Change queue_task_irq_off to queue_task_irq.
228 * The inline function queue_task_irq_off (tqueue.h)
229 * was removed from latest releases of 2.1.x kernel.
230 * Use of macro __init to mark the initialization
231 * routines, so memory can be reused.
232 * Also incorporate implementation of critical region
233 * in function cleanup_module() created by anonymous
236 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
237 * Change to support new firmware that solves DCD problem:
238 * application could fail to receive SIGHUP signal when DCD
241 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
242 * Changed for support linux versions 2.1.X.
243 * Backward compatible with linux versions 2.0.X.
244 * Corrected illegal use of filler field in
246 * Deleted some debug messages.
248 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
249 * Included check for NULL tty pointer in cyz_poll.
251 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
252 * Bill Foster at Blarg! Online services noticed that
253 * some of the switch elements of -Z modem control
254 * lacked a closing "break;"
256 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
257 * Changed low water threshold for buffer xmit_buf
259 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
260 * Marcio provided fix to modem status fetch for -Z
262 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
263 * improve mapping of -Z control page (thanks to Steve
264 * Price <stevep@fa.tdktca.com> for help on this)
266 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
267 * shift from CPU-bound to memcopy in cyz_polling operation
269 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
270 * Added support to set and report higher speeds.
272 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
273 * Some fixes in the HW flow control for the BETA release.
274 * Don't try to register the IRQ.
276 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
277 * make sure "cyc" appears in all kernel messages; all soft interrupts
278 * handled by same routine; recognize out-of-band reception; comment
279 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
280 * fix race condition in -Z buffer management; only -Y needs to explicitly
281 * flush chars; tidy up some startup messages;
283 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
284 * shift MOD_INC_USE_COUNT location to match
285 * serial.c; purge some diagnostic messages;
287 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
288 * enable modem status messages and fetch & process them; note
289 * time of last activity type for each port; set_line_char now
290 * supports more than line 0 and treats 0 baud correctly;
291 * get_modem_info senses rs_status;
293 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
294 * barely works--now's time to turn on
295 * more features 'til it breaks
297 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
298 * check more -Z board status; shorten boot message
300 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
301 * fix reference to ch_ctrl in startup; verify return
302 * values from cyz_issue_cmd and cyz_update_channel;
303 * more stuff to get modem control correct;
305 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
306 * more -Z stuff folded in; re-order changes to put -Z stuff
307 * after -Y stuff (to make changes clearer)
309 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
310 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
311 * Add code to send break. Clear firmware ID word at startup (so
312 * that other code won't talk to inactive board).
314 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
315 * add code for -Z in set_line_char
317 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
318 * fold more -Z stuff (or in some cases, error messages)
319 * into driver; add text to "don't know what to do" messages.
321 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
322 * moved compile-time flags near top of file; cosmetic changes
323 * to narrow text (to allow 2-up printing); changed many declarations
324 * to "static" to limit external symbols; shuffled code order to
325 * coalesce -Y and -Z specific code, also to put internal functions
326 * in order of tty_driver structure; added code to recognize -Z
327 * ports (and for moment, do nothing or report error); add cy_startup
328 * to parse boot command line for extra base addresses for ISA probes;
330 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
331 * reorder some code, fix types of some vars (int vs. long),
332 * add cy_setup to support user declared ISA addresses
334 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
335 * dump ioctl based firmware load (it's now a user level
336 * program); ensure uninitialzed ports cannot be used
338 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
339 * rename vars and restructure some code
341 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
342 * get right status back after boot load
344 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
345 * successfully loads firmware
347 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
348 * add more of the code for the boot/load ioctls
350 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
351 * start to add Z functionality--starting with ioctl
352 * for loading firmware
354 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
355 * added code to recognize Z/PCI card at initialization; report
356 * presence, but card is not initialized (because firmware needs
359 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
360 * starting minor number at zero; added missing verify_area
361 * as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
363 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
364 * remove unneeded boot message & fix CLOCAL hardware flow
365 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
366 * remove unused diagnostic statements; minor 0 is first;
368 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
369 * The kernel function vremap (available only in later 1.3.xx kernels)
370 * allows the access to memory addresses above the RAM. This revision
371 * of the driver supports PCI boards below 1Mb (device id 0x100) and
372 * above 1Mb (device id 0x101).
374 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
375 * Some global changes to interrupt handling spilled into
376 * this driver--mostly unused arguments in system function
377 * calls. Also added change by Marcio Saito which should
378 * reduce lost interrupts at startup by fast processors.
380 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
381 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
382 * in 1.3.41 kernel to remove a possible race condition, extend
383 * some error messages, and let the driver run as a loadable module
384 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
385 * possible race condition.
386 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
388 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
389 * Changes by Linus Torvalds in 1.3.33 kernel distribution
390 * required due to reordering of driver initialization.
391 * Drivers are now initialized *after* memory management.
393 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
394 * remove printk from ISR; fix typo
396 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
397 * Minor fixes in the PCI board support. PCI function calls in
398 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
399 * <duncan@okay.com>. "bad serial count" message removed.
401 * Revision 1.36.3 1995/08/22 09:19:42 marcio
402 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
403 * board initialization. Changes in the boot messages. The driver
404 * supports up to 4 boards and 64 ports by default.
406 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
407 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
409 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
410 * add missing break in modem control block in ioctl switch statement
411 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
413 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
414 * make sure CTS flow control is set as soon as possible (thanks
415 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
417 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
418 * initialize defaults for receive threshold and stale data timeout;
421 * Revision 1.36 1995/03/10 23:33:53 bentson
422 * added support of chips 4-7 in 32 port Cyclom-Ye;
423 * fix cy_interrupt pointer dereference problem
424 * (Joe Portman <baron@aa.net>);
425 * give better error response if open is attempted on non-existent port
426 * (Zachariah Vaum <jchryslr@netcom.com>);
427 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
428 * conditional compilation for -16Y on systems with fast, noisy bus;
429 * comment out diagnostic print function;
430 * cleaned up table of base addresses;
431 * set receiver time-out period register to correct value,
432 * set receive threshold to better default values,
433 * set chip timer to more accurate 200 Hz ticking,
434 * add code to monitor and modify receive parameters
435 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
436 * <njs@scifi.emi.net>);
438 * Revision 1.35 1994/12/16 13:54:18 steffen
439 * additional patch by Marcio Saito for board detection
440 * Accidently left out in 1.34
442 * Revision 1.34 1994/12/10 12:37:12 steffen
443 * This is the corrected version as suggested by Marcio Saito
445 * Revision 1.33 1994/12/01 22:41:18 bentson
446 * add hooks to support more high speeds directly; add tytso
447 * patch regarding CLOCAL wakeups
449 * Revision 1.32 1994/11/23 19:50:04 bentson
450 * allow direct kernel control of higher signalling rates;
451 * look for cards at additional locations
453 * Revision 1.31 1994/11/16 04:33:28 bentson
454 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
455 * a problem in chars_in_buffer has been resolved by some
456 * small changes; this should yield smoother output
458 * Revision 1.30 1994/11/16 04:28:05 bentson
459 * Fix from Corey Minyard, Internet: minyard@metronet.com,
460 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
461 * cy_hangup that appears to clear up much (all?) of the
462 * DTR glitches; also he's added/cleaned-up diagnostic messages
464 * Revision 1.29 1994/11/16 04:16:07 bentson
465 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
466 * operate higher speeds in same way as other serial ports;
467 * add more serial ports (for up to two 16-port muxes).
469 * Revision 1.28 1994/11/04 00:13:16 root
470 * turn off diagnostic messages
472 * Revision 1.27 1994/11/03 23:46:37 root
473 * bunch of changes to bring driver into greater conformance
474 * with the serial.c driver (looking for missed fixes)
476 * Revision 1.26 1994/11/03 22:40:36 root
477 * automatic interrupt probing fixed.
479 * Revision 1.25 1994/11/03 20:17:02 root
480 * start to implement auto-irq
482 * Revision 1.24 1994/11/03 18:01:55 root
483 * still working on modem signals--trying not to drop DTR
484 * during the getty/login processes
486 * Revision 1.23 1994/11/03 17:51:36 root
487 * extend baud rate support; set receive threshold as function
488 * of baud rate; fix some problems with RTS/CTS;
490 * Revision 1.22 1994/11/02 18:05:35 root
491 * changed arguments to udelay to type long to get
492 * delays to be of correct duration
494 * Revision 1.21 1994/11/02 17:37:30 root
495 * employ udelay (after calibrating loops_per_second earlier
496 * in init/main.c) instead of using home-grown delay routines
498 * Revision 1.20 1994/11/02 03:11:38 root
499 * cy_chars_in_buffer forces a return value of 0 to let
500 * login work (don't know why it does); some functions
501 * that were returning EFAULT, now executes the code;
502 * more work on deciding when to disable xmit interrupts;
504 * Revision 1.19 1994/11/01 20:10:14 root
505 * define routine to start transmission interrupts (by enabling
506 * transmit interrupts); directly enable/disable modem interrupts;
508 * Revision 1.18 1994/11/01 18:40:45 bentson
509 * Don't always enable transmit interrupts in startup; interrupt on
510 * TxMpty instead of TxRdy to help characters get out before shutdown;
511 * restructure xmit interrupt to check for chars first and quit if
512 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
515 * Revision 1.17 1994/10/30 04:39:45 bentson
516 * rename serial_driver and callout_driver to cy_serial_driver and
517 * cy_callout_driver to avoid linkage interference; initialize
518 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
519 * from cyclades_port structure; add paranoia check to cy_close;
521 * Revision 1.16 1994/10/30 01:14:33 bentson
522 * change major numbers; add some _early_ return statements;
524 * Revision 1.15 1994/10/29 06:43:15 bentson
525 * final tidying up for clean compile; enable some error reporting
527 * Revision 1.14 1994/10/28 20:30:22 Bentson
528 * lots of changes to drag the driver towards the new tty_io
529 * structures and operation. not expected to work, but may
532 * Revision 1.13 1994/07/21 23:08:57 Bentson
533 * add some diagnostic cruft; support 24 lines (for testing
534 * both -8Y and -16Y cards; be more thorough in servicing all
535 * chips during interrupt; add "volatile" a few places to
536 * circumvent compiler optimizations; fix base & offset
537 * computations in block_til_ready (was causing chip 0 to
540 * Revision 1.12 1994/07/19 16:42:11 Bentson
541 * add some hackery for kernel version 1.1.8; expand
542 * error messages; refine timing for delay loops and
543 * declare loop params volatile
545 * Revision 1.11 1994/06/11 21:53:10 bentson
546 * get use of save_car right in transmit interrupt service
548 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
549 * add some diagnostic printing; try to fix save_car stuff
551 * Revision 1.10 1994/06/11 20:36:08 bentson
552 * clean up compiler warnings
554 * Revision 1.9 1994/06/11 19:42:46 bentson
555 * added a bunch of code to support modem signalling
557 * Revision 1.8 1994/06/11 17:57:07 bentson
558 * recognize break & parity error
560 * Revision 1.7 1994/06/05 05:51:34 bentson
561 * Reorder baud table to be monotonic; add cli to CP; discard
562 * incoming characters and status if the line isn't open; start to
563 * fold code into cy_throttle; start to port get_serial_info,
564 * set_serial_info, get_modem_info, set_modem_info, and send_break
565 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
566 * get flow control characters from tty struct; invalidate ports w/o
569 * Revision 1.6 1994/05/31 18:42:21 bentson
570 * add a loop-breaker in the interrupt service routine;
571 * note when port is initialized so that it can be shut
572 * down under the right conditions; receive works without
575 * Revision 1.5 1994/05/30 00:55:02 bentson
576 * transmit works without obvious errors
578 * Revision 1.4 1994/05/27 18:46:27 bentson
579 * incorporated more code from lib_y.c; can now print short
580 * strings under interrupt control to port zero; seems to
581 * select ports/channels/lines correctly
583 * Revision 1.3 1994/05/25 22:12:44 bentson
584 * shifting from multi-port on a card to proper multiplexor
585 * data structures; added skeletons of most routines
587 * Revision 1.2 1994/05/19 13:21:43 bentson
588 * start to crib from other sources
592 #define CY_VERSION "2.5"
594 /* If you need to install more boards than NR_CARDS, change the constant
595 in the definition below. No other change is necessary to support up to
596 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
601 If the total number of ports is larger than NR_PORTS, change this
602 constant in the definition below. No other change is necessary to
603 support more boards/ports. */
611 #define SERIAL_PARANOIA_CHECK
613 #undef CY_DEBUG_THROTTLE
614 #undef CY_DEBUG_OTHER
616 #undef CY_DEBUG_COUNT
618 #undef CY_DEBUG_WAIT_UNTIL_SENT
619 #undef CY_DEBUG_INTERRUPTS
621 #undef CY_ENABLE_MONITORING
627 #include <linux/module.h>
628 #include <linux/errno.h>
629 #include <linux/signal.h>
630 #include <linux/sched.h>
631 #include <linux/timer.h>
632 #include <linux/interrupt.h>
633 #include <linux/tty.h>
634 #include <linux/tty_flip.h>
635 #include <linux/serial.h>
636 #include <linux/major.h>
637 #include <linux/string.h>
638 #include <linux/fcntl.h>
639 #include <linux/ptrace.h>
640 #include <linux/cyclades.h>
641 #include <linux/mm.h>
642 #include <linux/ioport.h>
643 #include <linux/init.h>
644 #include <linux/delay.h>
645 #include <linux/spinlock.h>
646 #include <linux/bitops.h>
647 #include <linux/firmware.h>
648 #include <linux/device.h>
650 #include <asm/system.h>
651 #include <linux/io.h>
653 #include <linux/uaccess.h>
655 #include <linux/kernel.h>
656 #include <linux/pci.h>
658 #include <linux/stat.h>
659 #include <linux/proc_fs.h>
660 #include <linux/seq_file.h>
662 static void cy_throttle(struct tty_struct *tty);
663 static void cy_send_xchar(struct tty_struct *tty, char ch);
665 #ifndef SERIAL_XMIT_SIZE
666 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
668 #define WAKEUP_CHARS 256
670 #define STD_COM_FLAGS (0)
673 #define ZL_MAX_BLOCKS 16
674 #define DRIVER_VERSION 0x02010203
675 #define RAM_SIZE 0x80000
682 struct zfile_header {
691 } __attribute__ ((packed));
693 struct zfile_config {
698 u32 block_list[ZL_MAX_BLOCKS];
699 } __attribute__ ((packed));
706 } __attribute__ ((packed));
708 static struct tty_driver *cy_serial_driver;
711 /* This is the address lookup table. The driver will probe for
712 Cyclom-Y/ISA boards at all addresses in here. If you want the
713 driver to probe addresses at a different address, add it to
714 this table. If the driver is probing some other board and
715 causing problems, remove the offending address from this table.
718 static unsigned int cy_isa_addresses[] = {
727 0, 0, 0, 0, 0, 0, 0, 0
730 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
733 static long maddr[NR_CARDS];
734 static int irq[NR_CARDS];
736 module_param_array(maddr, long, NULL, 0);
737 module_param_array(irq, int, NULL, 0);
740 #endif /* CONFIG_ISA */
742 /* This is the per-card data structure containing address, irq, number of
743 channels, etc. This driver supports a maximum of NR_CARDS cards.
745 static struct cyclades_card cy_card[NR_CARDS];
747 static int cy_next_channel; /* next minor available */
750 * This is used to look up the divisor speeds and the timeouts
751 * We're normally limited to 15 distinct baud rates. The extra
752 * are accessed via settings in info->port.flags.
753 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
754 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
758 static int baud_table[] = {
759 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
760 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
764 static char baud_co_25[] = { /* 25 MHz clock option table */
765 /* value => 00 01 02 03 04 */
766 /* divide by 8 32 128 512 2048 */
767 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
768 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
771 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
772 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
773 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
776 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
777 /* value => 00 01 02 03 04 */
778 /* divide by 8 32 128 512 2048 */
779 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
780 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
784 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
785 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
786 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
790 static char baud_cor3[] = { /* receive threshold */
791 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
792 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
797 * The Cyclades driver implements HW flow control as any serial driver.
798 * The cyclades_port structure member rflow and the vector rflow_thr
799 * allows us to take advantage of a special feature in the CD1400 to avoid
800 * data loss even when the system interrupt latency is too high. These flags
801 * are to be used only with very special applications. Setting these flags
802 * requires the use of a special cable (DTR and RTS reversed). In the new
803 * CD1400-based boards (rev. 6.00 or later), there is no need for special
807 static char rflow_thr[] = { /* rflow threshold */
808 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
809 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
813 /* The Cyclom-Ye has placed the sequential chips in non-sequential
814 * address order. This look-up table overcomes that problem.
816 static int cy_chip_offset[] = { 0x0000,
826 /* PCI related definitions */
829 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
831 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
833 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
835 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
837 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
839 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
841 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
843 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
845 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
846 { } /* end of table */
848 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
851 static void cy_start(struct tty_struct *);
852 static void set_line_char(struct cyclades_port *);
853 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
855 static unsigned detect_isa_irq(void __iomem *);
856 #endif /* CONFIG_ISA */
858 #ifndef CONFIG_CYZ_INTR
859 static void cyz_poll(unsigned long);
861 /* The Cyclades-Z polling cycle is defined by this variable */
862 static long cyz_polling_cycle = CZ_DEF_POLL;
864 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
866 #else /* CONFIG_CYZ_INTR */
867 static void cyz_rx_restart(unsigned long);
868 static struct timer_list cyz_rx_full_timer[NR_PORTS];
869 #endif /* CONFIG_CYZ_INTR */
871 static inline bool cy_is_Z(struct cyclades_card *card)
873 return card->num_chips == (unsigned int)-1;
876 static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
878 return readl(&ctl_addr->init_ctrl) & (1 << 17);
881 static inline bool cyz_fpga_loaded(struct cyclades_card *card)
883 return __cyz_fpga_loaded(card->ctl_addr.p9060);
886 static inline bool cyz_is_loaded(struct cyclades_card *card)
888 struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
890 return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
891 readl(&fw_id->signature) == ZFIRM_ID;
894 static inline int serial_paranoia_check(struct cyclades_port *info,
895 char *name, const char *routine)
897 #ifdef SERIAL_PARANOIA_CHECK
899 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
900 "in %s\n", name, routine);
904 if (info->magic != CYCLADES_MAGIC) {
905 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
906 "struct (%s) in %s\n", name, routine);
911 } /* serial_paranoia_check */
913 /***********************************************************/
914 /********* Start of block of Cyclom-Y specific code ********/
916 /* This routine waits up to 1000 micro-seconds for the previous
917 command to the Cirrus chip to complete and then issues the
918 new command. An error is returned if the previous command
919 didn't finish within the time limit.
921 This function is only called from inside spinlock-protected code.
923 static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
927 /* Check to see that the previous command has completed */
928 for (i = 0; i < 100; i++) {
929 if (readb(base_addr + (CyCCR << index)) == 0)
933 /* if the CCR never cleared, the previous command
934 didn't finish within the "reasonable time" */
938 /* Issue the new command */
939 cy_writeb(base_addr + (CyCCR << index), cmd);
942 } /* cyy_issue_cmd */
945 /* ISA interrupt detection code */
946 static unsigned detect_isa_irq(void __iomem *address)
949 unsigned long irqs, flags;
950 int save_xir, save_car;
951 int index = 0; /* IRQ probing is only for ISA */
953 /* forget possible initially masked and pending IRQ */
954 irq = probe_irq_off(probe_irq_on());
956 /* Clear interrupts on the board first */
957 cy_writeb(address + (Cy_ClrIntr << index), 0);
958 /* Cy_ClrIntr is 0x1800 */
960 irqs = probe_irq_on();
964 /* Enable the Tx interrupts on the CD1400 */
965 local_irq_save(flags);
966 cy_writeb(address + (CyCAR << index), 0);
967 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
969 cy_writeb(address + (CyCAR << index), 0);
970 cy_writeb(address + (CySRER << index),
971 readb(address + (CySRER << index)) | CyTxRdy);
972 local_irq_restore(flags);
977 /* Check which interrupt is in use */
978 irq = probe_irq_off(irqs);
981 save_xir = (u_char) readb(address + (CyTIR << index));
982 save_car = readb(address + (CyCAR << index));
983 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
984 cy_writeb(address + (CySRER << index),
985 readb(address + (CySRER << index)) & ~CyTxRdy);
986 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
987 cy_writeb(address + (CyCAR << index), (save_car));
988 cy_writeb(address + (Cy_ClrIntr << index), 0);
989 /* Cy_ClrIntr is 0x1800 */
991 return (irq > 0) ? irq : 0;
993 #endif /* CONFIG_ISA */
995 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
996 void __iomem *base_addr)
998 struct cyclades_port *info;
999 struct tty_struct *tty;
1000 int len, index = cinfo->bus_index;
1001 u8 save_xir, channel, save_car, data, char_count;
1003 #ifdef CY_DEBUG_INTERRUPTS
1004 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
1006 /* determine the channel & change to that context */
1007 save_xir = readb(base_addr + (CyRIR << index));
1008 channel = save_xir & CyIRChannel;
1009 info = &cinfo->ports[channel + chip * 4];
1010 save_car = readb(base_addr + (CyCAR << index));
1011 cy_writeb(base_addr + (CyCAR << index), save_xir);
1013 /* if there is nowhere to put the data, discard it */
1014 if (info->port.tty == NULL) {
1015 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1016 CyIVRRxEx) { /* exception */
1017 data = readb(base_addr + (CyRDSR << index));
1018 } else { /* normal character reception */
1019 char_count = readb(base_addr + (CyRDCR << index));
1020 while (char_count--)
1021 data = readb(base_addr + (CyRDSR << index));
1025 /* there is an open port for this data */
1026 tty = info->port.tty;
1027 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1028 CyIVRRxEx) { /* exception */
1029 data = readb(base_addr + (CyRDSR << index));
1031 /* For statistics only */
1034 else if (data & CyFRAME)
1035 info->icount.frame++;
1036 else if (data & CyPARITY)
1037 info->icount.parity++;
1038 else if (data & CyOVERRUN)
1039 info->icount.overrun++;
1041 if (data & info->ignore_status_mask) {
1045 if (tty_buffer_request_room(tty, 1)) {
1046 if (data & info->read_status_mask) {
1047 if (data & CyBREAK) {
1048 tty_insert_flip_char(tty,
1049 readb(base_addr + (CyRDSR <<
1050 index)), TTY_BREAK);
1052 if (info->port.flags & ASYNC_SAK)
1054 } else if (data & CyFRAME) {
1055 tty_insert_flip_char(tty,
1056 readb(base_addr + (CyRDSR <<
1057 index)), TTY_FRAME);
1059 info->idle_stats.frame_errs++;
1060 } else if (data & CyPARITY) {
1061 /* Pieces of seven... */
1062 tty_insert_flip_char(tty,
1063 readb(base_addr + (CyRDSR <<
1064 index)), TTY_PARITY);
1066 info->idle_stats.parity_errs++;
1067 } else if (data & CyOVERRUN) {
1068 tty_insert_flip_char(tty, 0,
1071 /* If the flip buffer itself is
1072 overflowing, we still lose
1073 the next incoming character.
1075 tty_insert_flip_char(tty,
1076 readb(base_addr + (CyRDSR <<
1077 index)), TTY_FRAME);
1079 info->idle_stats.overruns++;
1080 /* These two conditions may imply */
1081 /* a normal read should be done. */
1082 /* } else if(data & CyTIMEOUT) { */
1083 /* } else if(data & CySPECHAR) { */
1085 tty_insert_flip_char(tty, 0,
1090 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1094 /* there was a software buffer overrun and nothing
1095 * could be done about it!!! */
1096 info->icount.buf_overrun++;
1097 info->idle_stats.overruns++;
1099 } else { /* normal character reception */
1100 /* load # chars available from the chip */
1101 char_count = readb(base_addr + (CyRDCR << index));
1103 #ifdef CY_ENABLE_MONITORING
1104 ++info->mon.int_count;
1105 info->mon.char_count += char_count;
1106 if (char_count > info->mon.char_max)
1107 info->mon.char_max = char_count;
1108 info->mon.char_last = char_count;
1110 len = tty_buffer_request_room(tty, char_count);
1112 data = readb(base_addr + (CyRDSR << index));
1113 tty_insert_flip_char(tty, data, TTY_NORMAL);
1114 info->idle_stats.recv_bytes++;
1120 info->idle_stats.recv_idle = jiffies;
1122 tty_schedule_flip(tty);
1124 /* end of service */
1125 cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1126 cy_writeb(base_addr + (CyCAR << index), save_car);
1129 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
1130 void __iomem *base_addr)
1132 struct cyclades_port *info;
1133 int char_count, index = cinfo->bus_index;
1134 u8 save_xir, channel, save_car, outch;
1136 /* Since we only get here when the transmit buffer
1137 is empty, we know we can always stuff a dozen
1139 #ifdef CY_DEBUG_INTERRUPTS
1140 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1143 /* determine the channel & change to that context */
1144 save_xir = readb(base_addr + (CyTIR << index));
1145 channel = save_xir & CyIRChannel;
1146 save_car = readb(base_addr + (CyCAR << index));
1147 cy_writeb(base_addr + (CyCAR << index), save_xir);
1149 /* validate the port# (as configured and open) */
1150 if (channel + chip * 4 >= cinfo->nports) {
1151 cy_writeb(base_addr + (CySRER << index),
1152 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1155 info = &cinfo->ports[channel + chip * 4];
1156 if (info->port.tty == NULL) {
1157 cy_writeb(base_addr + (CySRER << index),
1158 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1162 /* load the on-chip space for outbound data */
1163 char_count = info->xmit_fifo_size;
1165 if (info->x_char) { /* send special char */
1166 outch = info->x_char;
1167 cy_writeb(base_addr + (CyTDR << index), outch);
1173 if (info->breakon || info->breakoff) {
1174 if (info->breakon) {
1175 cy_writeb(base_addr + (CyTDR << index), 0);
1176 cy_writeb(base_addr + (CyTDR << index), 0x81);
1180 if (info->breakoff) {
1181 cy_writeb(base_addr + (CyTDR << index), 0);
1182 cy_writeb(base_addr + (CyTDR << index), 0x83);
1188 while (char_count-- > 0) {
1189 if (!info->xmit_cnt) {
1190 if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1191 cy_writeb(base_addr + (CySRER << index),
1192 readb(base_addr + (CySRER << index)) &
1195 cy_writeb(base_addr + (CySRER << index),
1196 (readb(base_addr + (CySRER << index)) &
1197 ~CyTxRdy) | CyTxMpty);
1201 if (info->port.xmit_buf == NULL) {
1202 cy_writeb(base_addr + (CySRER << index),
1203 readb(base_addr + (CySRER << index)) &
1207 if (info->port.tty->stopped || info->port.tty->hw_stopped) {
1208 cy_writeb(base_addr + (CySRER << index),
1209 readb(base_addr + (CySRER << index)) &
1213 /* Because the Embedded Transmit Commands have been enabled,
1214 * we must check to see if the escape character, NULL, is being
1215 * sent. If it is, we must ensure that there is room for it to
1216 * be doubled in the output stream. Therefore we no longer
1217 * advance the pointer when the character is fetched, but
1218 * rather wait until after the check for a NULL output
1219 * character. This is necessary because there may not be room
1220 * for the two chars needed to send a NULL.)
1222 outch = info->port.xmit_buf[info->xmit_tail];
1225 info->xmit_tail = (info->xmit_tail + 1) &
1226 (SERIAL_XMIT_SIZE - 1);
1227 cy_writeb(base_addr + (CyTDR << index), outch);
1230 if (char_count > 1) {
1232 info->xmit_tail = (info->xmit_tail + 1) &
1233 (SERIAL_XMIT_SIZE - 1);
1234 cy_writeb(base_addr + (CyTDR << index), outch);
1235 cy_writeb(base_addr + (CyTDR << index), 0);
1243 tty_wakeup(info->port.tty);
1245 /* end of service */
1246 cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1247 cy_writeb(base_addr + (CyCAR << index), save_car);
1250 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1251 void __iomem *base_addr)
1253 struct cyclades_port *info;
1254 int index = cinfo->bus_index;
1255 u8 save_xir, channel, save_car, mdm_change, mdm_status;
1257 /* determine the channel & change to that context */
1258 save_xir = readb(base_addr + (CyMIR << index));
1259 channel = save_xir & CyIRChannel;
1260 info = &cinfo->ports[channel + chip * 4];
1261 save_car = readb(base_addr + (CyCAR << index));
1262 cy_writeb(base_addr + (CyCAR << index), save_xir);
1264 mdm_change = readb(base_addr + (CyMISR << index));
1265 mdm_status = readb(base_addr + (CyMSVR1 << index));
1267 if (!info->port.tty)
1270 if (mdm_change & CyANY_DELTA) {
1271 /* For statistics only */
1272 if (mdm_change & CyDCD)
1274 if (mdm_change & CyCTS)
1276 if (mdm_change & CyDSR)
1278 if (mdm_change & CyRI)
1281 wake_up_interruptible(&info->delta_msr_wait);
1284 if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
1285 if (!(mdm_status & CyDCD)) {
1286 tty_hangup(info->port.tty);
1287 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1289 wake_up_interruptible(&info->port.open_wait);
1291 if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
1292 if (info->port.tty->hw_stopped) {
1293 if (mdm_status & CyCTS) {
1294 /* cy_start isn't used
1296 info->port.tty->hw_stopped = 0;
1297 cy_writeb(base_addr + (CySRER << index),
1298 readb(base_addr + (CySRER << index)) |
1300 tty_wakeup(info->port.tty);
1303 if (!(mdm_status & CyCTS)) {
1304 /* cy_stop isn't used
1306 info->port.tty->hw_stopped = 1;
1307 cy_writeb(base_addr + (CySRER << index),
1308 readb(base_addr + (CySRER << index)) &
1313 /* if (mdm_change & CyDSR) {
1315 if (mdm_change & CyRI) {
1318 /* end of service */
1319 cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1320 cy_writeb(base_addr + (CyCAR << index), save_car);
1323 /* The real interrupt service routine is called
1324 whenever the card wants its hand held--chars
1325 received, out buffer empty, modem change, etc.
1327 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1330 struct cyclades_card *cinfo = dev_id;
1331 void __iomem *base_addr, *card_base_addr;
1332 unsigned int chip, too_many, had_work;
1335 if (unlikely(cinfo == NULL)) {
1336 #ifdef CY_DEBUG_INTERRUPTS
1337 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
1340 return IRQ_NONE; /* spurious interrupt */
1343 card_base_addr = cinfo->base_addr;
1344 index = cinfo->bus_index;
1346 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1347 if (unlikely(card_base_addr == NULL))
1350 /* This loop checks all chips in the card. Make a note whenever
1351 _any_ chip had some work to do, as this is considered an
1352 indication that there will be more to do. Only when no chip
1353 has any work does this outermost loop exit.
1357 for (chip = 0; chip < cinfo->num_chips; chip++) {
1358 base_addr = cinfo->base_addr +
1359 (cy_chip_offset[chip] << index);
1361 while ((status = readb(base_addr +
1362 (CySVRR << index))) != 0x00) {
1364 /* The purpose of the following test is to ensure that
1365 no chip can monopolize the driver. This forces the
1366 chips to be checked in a round-robin fashion (after
1367 draining each of a bunch (1000) of characters).
1369 if (1000 < too_many++)
1371 spin_lock(&cinfo->card_lock);
1372 if (status & CySRReceive) /* rx intr */
1373 cyy_chip_rx(cinfo, chip, base_addr);
1374 if (status & CySRTransmit) /* tx intr */
1375 cyy_chip_tx(cinfo, chip, base_addr);
1376 if (status & CySRModem) /* modem intr */
1377 cyy_chip_modem(cinfo, chip, base_addr);
1378 spin_unlock(&cinfo->card_lock);
1383 /* clear interrupts */
1384 spin_lock(&cinfo->card_lock);
1385 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1386 /* Cy_ClrIntr is 0x1800 */
1387 spin_unlock(&cinfo->card_lock);
1389 } /* cyy_interrupt */
1391 /***********************************************************/
1392 /********* End of block of Cyclom-Y specific code **********/
1393 /******** Start of block of Cyclades-Z specific code *******/
1394 /***********************************************************/
1397 cyz_fetch_msg(struct cyclades_card *cinfo,
1398 __u32 *channel, __u8 *cmd, __u32 *param)
1400 struct FIRM_ID __iomem *firm_id;
1401 struct ZFW_CTRL __iomem *zfw_ctrl;
1402 struct BOARD_CTRL __iomem *board_ctrl;
1403 unsigned long loc_doorbell;
1405 firm_id = cinfo->base_addr + ID_ADDRESS;
1406 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1407 board_ctrl = &zfw_ctrl->board_ctrl;
1409 loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
1411 *cmd = (char)(0xff & loc_doorbell);
1412 *channel = readl(&board_ctrl->fwcmd_channel);
1413 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1414 cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
1418 } /* cyz_fetch_msg */
1421 cyz_issue_cmd(struct cyclades_card *cinfo,
1422 __u32 channel, __u8 cmd, __u32 param)
1424 struct FIRM_ID __iomem *firm_id;
1425 struct ZFW_CTRL __iomem *zfw_ctrl;
1426 struct BOARD_CTRL __iomem *board_ctrl;
1427 __u32 __iomem *pci_doorbell;
1430 firm_id = cinfo->base_addr + ID_ADDRESS;
1431 if (!cyz_is_loaded(cinfo))
1434 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1435 board_ctrl = &zfw_ctrl->board_ctrl;
1438 pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
1439 while ((readl(pci_doorbell) & 0xff) != 0) {
1440 if (index++ == 1000)
1441 return (int)(readl(pci_doorbell) & 0xff);
1444 cy_writel(&board_ctrl->hcmd_channel, channel);
1445 cy_writel(&board_ctrl->hcmd_param, param);
1446 cy_writel(pci_doorbell, (long)cmd);
1449 } /* cyz_issue_cmd */
1451 static void cyz_handle_rx(struct cyclades_port *info,
1452 struct BUF_CTRL __iomem *buf_ctrl)
1454 struct cyclades_card *cinfo = info->card;
1455 struct tty_struct *tty = info->port.tty;
1456 unsigned int char_count;
1463 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1465 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1466 rx_put = readl(&buf_ctrl->rx_put);
1467 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1468 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1469 if (rx_put >= rx_get)
1470 char_count = rx_put - rx_get;
1472 char_count = rx_put - rx_get + rx_bufsize;
1475 #ifdef CY_ENABLE_MONITORING
1476 info->mon.int_count++;
1477 info->mon.char_count += char_count;
1478 if (char_count > info->mon.char_max)
1479 info->mon.char_max = char_count;
1480 info->mon.char_last = char_count;
1483 /* flush received characters */
1484 new_rx_get = (new_rx_get + char_count) &
1486 info->rflush_count++;
1489 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1490 for performance, but because of buffer boundaries, there
1491 may be several steps to the operation */
1493 len = tty_prepare_flip_string(tty, &buf,
1498 len = min_t(unsigned int, min(len, char_count),
1499 rx_bufsize - new_rx_get);
1501 memcpy_fromio(buf, cinfo->base_addr +
1502 rx_bufaddr + new_rx_get, len);
1504 new_rx_get = (new_rx_get + len) &
1507 info->icount.rx += len;
1508 info->idle_stats.recv_bytes += len;
1511 len = tty_buffer_request_room(tty, char_count);
1513 data = readb(cinfo->base_addr + rx_bufaddr +
1515 new_rx_get = (new_rx_get + 1) &
1517 tty_insert_flip_char(tty, data, TTY_NORMAL);
1518 info->idle_stats.recv_bytes++;
1522 #ifdef CONFIG_CYZ_INTR
1523 /* Recalculate the number of chars in the RX buffer and issue
1524 a cmd in case it's higher than the RX high water mark */
1525 rx_put = readl(&buf_ctrl->rx_put);
1526 if (rx_put >= rx_get)
1527 char_count = rx_put - rx_get;
1529 char_count = rx_put - rx_get + rx_bufsize;
1530 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1531 !timer_pending(&cyz_rx_full_timer[
1533 mod_timer(&cyz_rx_full_timer[info->line],
1536 info->idle_stats.recv_idle = jiffies;
1537 tty_schedule_flip(tty);
1540 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1544 static void cyz_handle_tx(struct cyclades_port *info,
1545 struct BUF_CTRL __iomem *buf_ctrl)
1547 struct cyclades_card *cinfo = info->card;
1548 struct tty_struct *tty = info->port.tty;
1550 unsigned int char_count;
1554 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1556 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1559 tx_get = readl(&buf_ctrl->tx_get);
1560 tx_put = readl(&buf_ctrl->tx_put);
1561 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1562 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1563 if (tx_put >= tx_get)
1564 char_count = tx_get - tx_put - 1 + tx_bufsize;
1566 char_count = tx_get - tx_put - 1;
1573 if (info->x_char) { /* send special char */
1574 data = info->x_char;
1576 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1577 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1583 while (0 < (small_count = min_t(unsigned int,
1584 tx_bufsize - tx_put, min_t(unsigned int,
1585 (SERIAL_XMIT_SIZE - info->xmit_tail),
1586 min_t(unsigned int, info->xmit_cnt,
1589 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1591 &info->port.xmit_buf[info->xmit_tail],
1594 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1595 char_count -= small_count;
1596 info->icount.tx += small_count;
1597 info->xmit_cnt -= small_count;
1598 info->xmit_tail = (info->xmit_tail + small_count) &
1599 (SERIAL_XMIT_SIZE - 1);
1602 while (info->xmit_cnt && char_count) {
1603 data = info->port.xmit_buf[info->xmit_tail];
1605 info->xmit_tail = (info->xmit_tail + 1) &
1606 (SERIAL_XMIT_SIZE - 1);
1608 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1609 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1617 cy_writel(&buf_ctrl->tx_put, tx_put);
1621 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1623 struct tty_struct *tty;
1624 struct cyclades_port *info;
1625 static struct FIRM_ID __iomem *firm_id;
1626 static struct ZFW_CTRL __iomem *zfw_ctrl;
1627 static struct BOARD_CTRL __iomem *board_ctrl;
1628 static struct CH_CTRL __iomem *ch_ctrl;
1629 static struct BUF_CTRL __iomem *buf_ctrl;
1630 __u32 channel, param, fw_ver;
1635 firm_id = cinfo->base_addr + ID_ADDRESS;
1636 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1637 board_ctrl = &zfw_ctrl->board_ctrl;
1638 fw_ver = readl(&board_ctrl->fw_version);
1640 while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
1643 info = &cinfo->ports[channel];
1644 tty = info->port.tty;
1648 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1649 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1653 tty_insert_flip_char(tty, 0, TTY_PARITY);
1658 tty_insert_flip_char(tty, 0, TTY_FRAME);
1663 tty_insert_flip_char(tty, 0, TTY_BREAK);
1670 if (info->port.flags & ASYNC_CHECK_CD) {
1671 if ((fw_ver > 241 ? ((u_long) param) :
1672 readl(&ch_ctrl->rs_status)) &
1674 wake_up_interruptible(&info->port.open_wait);
1676 tty_hangup(info->port.tty);
1677 wake_up_interruptible(&info->port.open_wait);
1678 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1696 complete(&info->shutdown_wait);
1699 #ifdef CONFIG_CYZ_INTR
1703 /* Reception Interrupt */
1704 #ifdef CY_DEBUG_INTERRUPTS
1705 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1706 "port %ld\n", info->card, channel);
1708 cyz_handle_rx(info, buf_ctrl);
1713 /* Transmission Interrupt */
1714 #ifdef CY_DEBUG_INTERRUPTS
1715 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1716 "port %ld\n", info->card, channel);
1718 cyz_handle_tx(info, buf_ctrl);
1720 #endif /* CONFIG_CYZ_INTR */
1722 /* should do something with this !!! */
1728 wake_up_interruptible(&info->delta_msr_wait);
1730 tty_schedule_flip(tty);
1734 #ifdef CONFIG_CYZ_INTR
1735 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1737 struct cyclades_card *cinfo = dev_id;
1739 if (unlikely(!cyz_is_loaded(cinfo))) {
1740 #ifdef CY_DEBUG_INTERRUPTS
1741 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1747 /* Handle the interrupts */
1748 cyz_handle_cmd(cinfo);
1751 } /* cyz_interrupt */
1753 static void cyz_rx_restart(unsigned long arg)
1755 struct cyclades_port *info = (struct cyclades_port *)arg;
1756 struct cyclades_card *card = info->card;
1758 __u32 channel = info->line - card->first_line;
1759 unsigned long flags;
1761 spin_lock_irqsave(&card->card_lock, flags);
1762 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1764 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1765 info->line, retval);
1767 spin_unlock_irqrestore(&card->card_lock, flags);
1770 #else /* CONFIG_CYZ_INTR */
1772 static void cyz_poll(unsigned long arg)
1774 struct cyclades_card *cinfo;
1775 struct cyclades_port *info;
1776 struct tty_struct *tty;
1777 struct FIRM_ID __iomem *firm_id;
1778 struct ZFW_CTRL __iomem *zfw_ctrl;
1779 struct BUF_CTRL __iomem *buf_ctrl;
1780 unsigned long expires = jiffies + HZ;
1781 unsigned int port, card;
1783 for (card = 0; card < NR_CARDS; card++) {
1784 cinfo = &cy_card[card];
1786 if (!cy_is_Z(cinfo))
1788 if (!cyz_is_loaded(cinfo))
1791 firm_id = cinfo->base_addr + ID_ADDRESS;
1792 zfw_ctrl = cinfo->base_addr +
1793 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1795 /* Skip first polling cycle to avoid racing conditions with the FW */
1796 if (!cinfo->intr_enabled) {
1797 cinfo->intr_enabled = 1;
1801 cyz_handle_cmd(cinfo);
1803 for (port = 0; port < cinfo->nports; port++) {
1804 info = &cinfo->ports[port];
1805 tty = info->port.tty;
1806 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1808 if (!info->throttle)
1809 cyz_handle_rx(info, buf_ctrl);
1810 cyz_handle_tx(info, buf_ctrl);
1812 /* poll every 'cyz_polling_cycle' period */
1813 expires = jiffies + cyz_polling_cycle;
1815 mod_timer(&cyz_timerlist, expires);
1818 #endif /* CONFIG_CYZ_INTR */
1820 /********** End of block of Cyclades-Z specific code *********/
1821 /***********************************************************/
1823 /* This is called whenever a port becomes active;
1824 interrupts are enabled and DTR & RTS are turned on.
1826 static int startup(struct cyclades_port *info)
1828 struct cyclades_card *card;
1829 unsigned long flags;
1831 void __iomem *base_addr;
1832 int chip, channel, index;
1836 channel = info->line - card->first_line;
1838 page = get_zeroed_page(GFP_KERNEL);
1842 spin_lock_irqsave(&card->card_lock, flags);
1844 if (info->port.flags & ASYNC_INITIALIZED) {
1851 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1856 if (info->port.xmit_buf)
1859 info->port.xmit_buf = (unsigned char *)page;
1861 spin_unlock_irqrestore(&card->card_lock, flags);
1863 set_line_char(info);
1865 if (!cy_is_Z(card)) {
1866 chip = channel >> 2;
1868 index = card->bus_index;
1869 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1871 #ifdef CY_DEBUG_OPEN
1872 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1874 card, chip, channel, base_addr);
1876 spin_lock_irqsave(&card->card_lock, flags);
1878 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1880 cy_writeb(base_addr + (CyRTPR << index),
1881 (info->default_timeout ? info->default_timeout : 0x02));
1882 /* 10ms rx timeout */
1884 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1887 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1888 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1889 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1892 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1893 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
1894 readb(base_addr + (CyMSVR1 << index)),
1895 readb(base_addr + (CyMSVR2 << index)));
1898 cy_writeb(base_addr + (CySRER << index),
1899 readb(base_addr + (CySRER << index)) | CyRxData);
1900 info->port.flags |= ASYNC_INITIALIZED;
1903 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1904 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1905 info->breakon = info->breakoff = 0;
1906 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1907 info->idle_stats.in_use =
1908 info->idle_stats.recv_idle =
1909 info->idle_stats.xmit_idle = jiffies;
1911 spin_unlock_irqrestore(&card->card_lock, flags);
1914 struct FIRM_ID __iomem *firm_id;
1915 struct ZFW_CTRL __iomem *zfw_ctrl;
1916 struct BOARD_CTRL __iomem *board_ctrl;
1917 struct CH_CTRL __iomem *ch_ctrl;
1919 base_addr = card->base_addr;
1921 firm_id = base_addr + ID_ADDRESS;
1922 if (!cyz_is_loaded(card))
1925 zfw_ctrl = card->base_addr +
1926 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1927 board_ctrl = &zfw_ctrl->board_ctrl;
1928 ch_ctrl = zfw_ctrl->ch_ctrl;
1930 #ifdef CY_DEBUG_OPEN
1931 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1932 "base_addr %p\n", card, channel, base_addr);
1934 spin_lock_irqsave(&card->card_lock, flags);
1936 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1938 #ifdef CONFIG_CYZ_INTR
1939 cy_writel(&ch_ctrl[channel].intr_enable,
1940 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1941 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1943 cy_writel(&ch_ctrl[channel].intr_enable,
1944 C_IN_IOCTLW | C_IN_MDCD);
1945 #endif /* CONFIG_CYZ_INTR */
1947 #ifdef CONFIG_CYZ_INTR
1948 cy_writel(&ch_ctrl[channel].intr_enable,
1949 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1950 C_IN_RXNNDT | C_IN_MDCD);
1952 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1953 #endif /* CONFIG_CYZ_INTR */
1956 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1958 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1959 "%x\n", info->line, retval);
1962 /* Flush RX buffers before raising DTR and RTS */
1963 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1965 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1966 "%x\n", info->line, retval);
1969 /* set timeout !!! */
1970 /* set RTS and DTR !!! */
1971 cy_writel(&ch_ctrl[channel].rs_control,
1972 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
1974 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
1976 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1977 "%x\n", info->line, retval);
1980 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1983 /* enable send, recv, modem !!! */
1985 info->port.flags |= ASYNC_INITIALIZED;
1987 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1988 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1989 info->breakon = info->breakoff = 0;
1990 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1991 info->idle_stats.in_use =
1992 info->idle_stats.recv_idle =
1993 info->idle_stats.xmit_idle = jiffies;
1995 spin_unlock_irqrestore(&card->card_lock, flags);
1998 #ifdef CY_DEBUG_OPEN
1999 printk(KERN_DEBUG "cyc startup done\n");
2004 spin_unlock_irqrestore(&card->card_lock, flags);
2008 static void start_xmit(struct cyclades_port *info)
2010 struct cyclades_card *card;
2011 unsigned long flags;
2012 void __iomem *base_addr;
2013 int chip, channel, index;
2016 channel = info->line - card->first_line;
2017 if (!cy_is_Z(card)) {
2018 chip = channel >> 2;
2020 index = card->bus_index;
2021 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2023 spin_lock_irqsave(&card->card_lock, flags);
2024 cy_writeb(base_addr + (CyCAR << index), channel);
2025 cy_writeb(base_addr + (CySRER << index),
2026 readb(base_addr + (CySRER << index)) | CyTxRdy);
2027 spin_unlock_irqrestore(&card->card_lock, flags);
2029 #ifdef CONFIG_CYZ_INTR
2032 spin_lock_irqsave(&card->card_lock, flags);
2033 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2035 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2036 "%x\n", info->line, retval);
2038 spin_unlock_irqrestore(&card->card_lock, flags);
2039 #else /* CONFIG_CYZ_INTR */
2040 /* Don't have to do anything at this time */
2041 #endif /* CONFIG_CYZ_INTR */
2046 * This routine shuts down a serial port; interrupts are disabled,
2047 * and DTR is dropped if the hangup on close termio flag is on.
2049 static void shutdown(struct cyclades_port *info)
2051 struct cyclades_card *card;
2052 unsigned long flags;
2053 void __iomem *base_addr;
2054 int chip, channel, index;
2056 if (!(info->port.flags & ASYNC_INITIALIZED))
2060 channel = info->line - card->first_line;
2061 if (!cy_is_Z(card)) {
2062 chip = channel >> 2;
2064 index = card->bus_index;
2065 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2067 #ifdef CY_DEBUG_OPEN
2068 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2069 "channel %d, base_addr %p\n",
2070 card, chip, channel, base_addr);
2073 spin_lock_irqsave(&card->card_lock, flags);
2075 /* Clear delta_msr_wait queue to avoid mem leaks. */
2076 wake_up_interruptible(&info->delta_msr_wait);
2078 if (info->port.xmit_buf) {
2079 unsigned char *temp;
2080 temp = info->port.xmit_buf;
2081 info->port.xmit_buf = NULL;
2082 free_page((unsigned long)temp);
2084 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2085 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
2086 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2087 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2089 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2090 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2091 readb(base_addr + (CyMSVR1 << index)),
2092 readb(base_addr + (CyMSVR2 << index)));
2095 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2096 /* it may be appropriate to clear _XMIT at
2097 some later date (after testing)!!! */
2100 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2101 info->port.flags &= ~ASYNC_INITIALIZED;
2102 spin_unlock_irqrestore(&card->card_lock, flags);
2104 struct FIRM_ID __iomem *firm_id;
2105 struct ZFW_CTRL __iomem *zfw_ctrl;
2106 struct BOARD_CTRL __iomem *board_ctrl;
2107 struct CH_CTRL __iomem *ch_ctrl;
2110 base_addr = card->base_addr;
2111 #ifdef CY_DEBUG_OPEN
2112 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2113 "base_addr %p\n", card, channel, base_addr);
2116 firm_id = base_addr + ID_ADDRESS;
2117 if (!cyz_is_loaded(card))
2120 zfw_ctrl = card->base_addr +
2121 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2122 board_ctrl = &zfw_ctrl->board_ctrl;
2123 ch_ctrl = zfw_ctrl->ch_ctrl;
2125 spin_lock_irqsave(&card->card_lock, flags);
2127 if (info->port.xmit_buf) {
2128 unsigned char *temp;
2129 temp = info->port.xmit_buf;
2130 info->port.xmit_buf = NULL;
2131 free_page((unsigned long)temp);
2134 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
2135 cy_writel(&ch_ctrl[channel].rs_control,
2136 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2137 ~(C_RS_RTS | C_RS_DTR)));
2138 retval = cyz_issue_cmd(info->card, channel,
2141 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2142 "was %x\n", info->line, retval);
2145 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2150 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2151 info->port.flags &= ~ASYNC_INITIALIZED;
2153 spin_unlock_irqrestore(&card->card_lock, flags);
2156 #ifdef CY_DEBUG_OPEN
2157 printk(KERN_DEBUG "cyc shutdown done\n");
2162 * ------------------------------------------------------------
2163 * cy_open() and friends
2164 * ------------------------------------------------------------
2168 block_til_ready(struct tty_struct *tty, struct file *filp,
2169 struct cyclades_port *info)
2171 DECLARE_WAITQUEUE(wait, current);
2172 struct cyclades_card *cinfo;
2173 unsigned long flags;
2174 int chip, channel, index;
2176 void __iomem *base_addr;
2179 channel = info->line - cinfo->first_line;
2182 * If the device is in the middle of being closed, then block
2183 * until it's done, and then try again.
2185 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2186 wait_event_interruptible(info->port.close_wait,
2187 !(info->port.flags & ASYNC_CLOSING));
2188 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2192 * If non-blocking mode is set, then make the check up front
2195 if ((filp->f_flags & O_NONBLOCK) ||
2196 (tty->flags & (1 << TTY_IO_ERROR))) {
2197 info->port.flags |= ASYNC_NORMAL_ACTIVE;
2202 * Block waiting for the carrier detect and the line to become
2203 * free (i.e., not in use by the callout). While we are in
2204 * this loop, info->port.count is dropped by one, so that
2205 * cy_close() knows when to free things. We restore it upon
2206 * exit, either normal or abnormal.
2209 add_wait_queue(&info->port.open_wait, &wait);
2210 #ifdef CY_DEBUG_OPEN
2211 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2212 "count = %d\n", info->line, info->port.count);
2214 spin_lock_irqsave(&cinfo->card_lock, flags);
2215 if (!tty_hung_up_p(filp))
2217 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2218 #ifdef CY_DEBUG_COUNT
2219 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2220 "%d\n", current->pid, info->port.count);
2222 info->port.blocked_open++;
2224 if (!cy_is_Z(cinfo)) {
2225 chip = channel >> 2;
2227 index = cinfo->bus_index;
2228 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2231 spin_lock_irqsave(&cinfo->card_lock, flags);
2232 if ((tty->termios->c_cflag & CBAUD)) {
2233 cy_writeb(base_addr + (CyCAR << index),
2235 cy_writeb(base_addr + (CyMSVR1 << index),
2237 cy_writeb(base_addr + (CyMSVR2 << index),
2240 printk(KERN_DEBUG "cyc:block_til_ready raising "
2242 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2243 readb(base_addr + (CyMSVR1 << index)),
2244 readb(base_addr + (CyMSVR2 << index)));
2247 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2249 set_current_state(TASK_INTERRUPTIBLE);
2250 if (tty_hung_up_p(filp) ||
2251 !(info->port.flags & ASYNC_INITIALIZED)) {
2252 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2253 -EAGAIN : -ERESTARTSYS);
2257 spin_lock_irqsave(&cinfo->card_lock, flags);
2258 cy_writeb(base_addr + (CyCAR << index),
2260 if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2262 (CyMSVR1 << index)) & CyDCD))) {
2263 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2266 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2268 if (signal_pending(current)) {
2269 retval = -ERESTARTSYS;
2272 #ifdef CY_DEBUG_OPEN
2273 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2274 "ttyC%d, count = %d\n",
2275 info->line, info->port.count);
2280 struct FIRM_ID __iomem *firm_id;
2281 struct ZFW_CTRL __iomem *zfw_ctrl;
2282 struct BOARD_CTRL __iomem *board_ctrl;
2283 struct CH_CTRL __iomem *ch_ctrl;
2285 base_addr = cinfo->base_addr;
2286 firm_id = base_addr + ID_ADDRESS;
2287 if (!cyz_is_loaded(cinfo)) {
2288 __set_current_state(TASK_RUNNING);
2289 remove_wait_queue(&info->port.open_wait, &wait);
2293 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
2295 board_ctrl = &zfw_ctrl->board_ctrl;
2296 ch_ctrl = zfw_ctrl->ch_ctrl;
2299 if ((tty->termios->c_cflag & CBAUD)) {
2300 cy_writel(&ch_ctrl[channel].rs_control,
2301 readl(&ch_ctrl[channel].rs_control) |
2302 C_RS_RTS | C_RS_DTR);
2303 retval = cyz_issue_cmd(cinfo,
2304 channel, C_CM_IOCTLM, 0L);
2306 printk(KERN_ERR "cyc:block_til_ready "
2307 "retval on ttyC%d was %x\n",
2308 info->line, retval);
2311 printk(KERN_DEBUG "cyc:block_til_ready raising "
2316 set_current_state(TASK_INTERRUPTIBLE);
2317 if (tty_hung_up_p(filp) ||
2318 !(info->port.flags & ASYNC_INITIALIZED)) {
2319 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2320 -EAGAIN : -ERESTARTSYS);
2323 if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2324 (readl(&ch_ctrl[channel].rs_status) &
2328 if (signal_pending(current)) {
2329 retval = -ERESTARTSYS;
2332 #ifdef CY_DEBUG_OPEN
2333 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2334 "ttyC%d, count = %d\n",
2335 info->line, info->port.count);
2340 __set_current_state(TASK_RUNNING);
2341 remove_wait_queue(&info->port.open_wait, &wait);
2342 if (!tty_hung_up_p(filp)) {
2344 #ifdef CY_DEBUG_COUNT
2345 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2346 "count to %d\n", current->pid, info->port.count);
2349 info->port.blocked_open--;
2350 #ifdef CY_DEBUG_OPEN
2351 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2352 "count = %d\n", info->line, info->port.count);
2356 info->port.flags |= ASYNC_NORMAL_ACTIVE;
2358 } /* block_til_ready */
2361 * This routine is called whenever a serial port is opened. It
2362 * performs the serial-specific initialization for the tty structure.
2364 static int cy_open(struct tty_struct *tty, struct file *filp)
2366 struct cyclades_port *info;
2367 unsigned int i, line;
2371 if (tty->index < 0 || NR_PORTS <= line)
2374 for (i = 0; i < NR_CARDS; i++)
2375 if (line < cy_card[i].first_line + cy_card[i].nports &&
2376 line >= cy_card[i].first_line)
2380 info = &cy_card[i].ports[line - cy_card[i].first_line];
2384 /* If the card's firmware hasn't been loaded,
2385 treat it as absent from the system. This
2386 will make the user pay attention.
2388 if (cy_is_Z(info->card)) {
2389 struct cyclades_card *cinfo = info->card;
2390 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2392 if (!cyz_is_loaded(cinfo)) {
2393 if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
2394 readl(&firm_id->signature) ==
2396 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2397 "need an external power supply for "
2398 "this number of ports.\nFirmware "
2401 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2406 #ifdef CONFIG_CYZ_INTR
2408 /* In case this Z board is operating in interrupt mode, its
2409 interrupts should be enabled as soon as the first open
2410 happens to one of its ports. */
2411 if (!cinfo->intr_enabled) {
2414 /* Enable interrupts on the PLX chip */
2415 intr = readw(&cinfo->ctl_addr.p9060->
2416 intr_ctrl_stat) | 0x0900;
2417 cy_writew(&cinfo->ctl_addr.p9060->
2418 intr_ctrl_stat, intr);
2419 /* Enable interrupts on the FW */
2420 retval = cyz_issue_cmd(cinfo, 0,
2423 printk(KERN_ERR "cyc:IRQ enable retval "
2424 "was %x\n", retval);
2426 cinfo->intr_enabled = 1;
2429 #endif /* CONFIG_CYZ_INTR */
2430 /* Make sure this Z port really exists in hardware */
2431 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2434 #ifdef CY_DEBUG_OTHER
2435 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2437 tty->driver_data = info;
2438 info->port.tty = tty;
2439 if (serial_paranoia_check(info, tty->name, "cy_open"))
2442 #ifdef CY_DEBUG_OPEN
2443 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2447 #ifdef CY_DEBUG_COUNT
2448 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2449 current->pid, info->port.count);
2453 * If the port is the middle of closing, bail out now
2455 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2456 wait_event_interruptible(info->port.close_wait,
2457 !(info->port.flags & ASYNC_CLOSING));
2458 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2462 * Start up serial port
2464 retval = startup(info);
2468 retval = block_til_ready(tty, filp, info);
2470 #ifdef CY_DEBUG_OPEN
2471 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2472 "with %d\n", retval);
2479 #ifdef CY_DEBUG_OPEN
2480 printk(KERN_DEBUG "cyc:cy_open done\n");
2486 * cy_wait_until_sent() --- wait until the transmitter is empty
2488 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2490 struct cyclades_card *card;
2491 struct cyclades_port *info = tty->driver_data;
2492 void __iomem *base_addr;
2493 int chip, channel, index;
2494 unsigned long orig_jiffies;
2497 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2500 if (info->xmit_fifo_size == 0)
2501 return; /* Just in case.... */
2503 orig_jiffies = jiffies;
2506 * Set the check interval to be 1/5 of the estimated time to
2507 * send a single character, and make it at least 1. The check
2508 * interval should also be less than the timeout.
2510 * Note: we have to use pretty tight timings here to satisfy
2513 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2514 char_time = char_time / 5;
2520 char_time = min(char_time, timeout);
2522 * If the transmitter hasn't cleared in twice the approximate
2523 * amount of time to send the entire FIFO, it probably won't
2524 * ever clear. This assumes the UART isn't doing flow
2525 * control, which is currently the case. Hence, if it ever
2526 * takes longer than info->timeout, this is probably due to a
2527 * UART bug of some kind. So, we clamp the timeout parameter at
2530 if (!timeout || timeout > 2 * info->timeout)
2531 timeout = 2 * info->timeout;
2532 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2533 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2534 timeout, char_time, jiffies);
2537 channel = (info->line) - (card->first_line);
2538 if (!cy_is_Z(card)) {
2539 chip = channel >> 2;
2541 index = card->bus_index;
2542 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2543 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2544 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2545 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2547 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2549 if (timeout && time_after(jiffies, orig_jiffies +
2554 /* Run one more char cycle */
2555 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2557 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2558 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2562 static void cy_flush_buffer(struct tty_struct *tty)
2564 struct cyclades_port *info = tty->driver_data;
2565 struct cyclades_card *card;
2566 int channel, retval;
2567 unsigned long flags;
2570 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
2573 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
2577 channel = info->line - card->first_line;
2579 spin_lock_irqsave(&card->card_lock, flags);
2580 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2581 spin_unlock_irqrestore(&card->card_lock, flags);
2583 if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
2585 spin_lock_irqsave(&card->card_lock, flags);
2586 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
2588 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
2589 "was %x\n", info->line, retval);
2591 spin_unlock_irqrestore(&card->card_lock, flags);
2594 } /* cy_flush_buffer */
2598 * This routine is called when a particular tty device is closed.
2600 static void cy_close(struct tty_struct *tty, struct file *filp)
2602 struct cyclades_port *info = tty->driver_data;
2603 struct cyclades_card *card;
2604 unsigned long flags;
2606 #ifdef CY_DEBUG_OTHER
2607 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2610 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
2615 spin_lock_irqsave(&card->card_lock, flags);
2616 /* If the TTY is being hung up, nothing to do */
2617 if (tty_hung_up_p(filp)) {
2618 spin_unlock_irqrestore(&card->card_lock, flags);
2621 #ifdef CY_DEBUG_OPEN
2622 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2625 if ((tty->count == 1) && (info->port.count != 1)) {
2627 * Uh, oh. tty->count is 1, which means that the tty
2628 * structure will be freed. Info->count should always
2629 * be one in these conditions. If it's greater than
2630 * one, we've got real problems, since it means the
2631 * serial port won't be shutdown.
2633 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2634 "tty->count is 1, info->port.count is %d\n", info->port.count);
2635 info->port.count = 1;
2637 #ifdef CY_DEBUG_COUNT
2638 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
2639 current->pid, info->port.count - 1);
2641 if (--info->port.count < 0) {
2642 #ifdef CY_DEBUG_COUNT
2643 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2645 info->port.count = 0;
2647 if (info->port.count) {
2648 spin_unlock_irqrestore(&card->card_lock, flags);
2651 info->port.flags |= ASYNC_CLOSING;
2654 * Now we wait for the transmit buffer to clear; and we notify
2655 * the line discipline to only process XON/XOFF characters.
2658 spin_unlock_irqrestore(&card->card_lock, flags);
2659 if (info->port.closing_wait != CY_CLOSING_WAIT_NONE)
2660 tty_wait_until_sent(tty, info->port.closing_wait);
2662 spin_lock_irqsave(&card->card_lock, flags);
2664 if (!cy_is_Z(card)) {
2665 int channel = info->line - card->first_line;
2666 int index = card->bus_index;
2667 void __iomem *base_addr = card->base_addr +
2668 (cy_chip_offset[channel >> 2] << index);
2669 /* Stop accepting input */
2671 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2672 cy_writeb(base_addr + (CySRER << index),
2673 readb(base_addr + (CySRER << index)) & ~CyRxData);
2674 if (info->port.flags & ASYNC_INITIALIZED) {
2675 /* Waiting for on-board buffers to be empty before
2677 spin_unlock_irqrestore(&card->card_lock, flags);
2678 cy_wait_until_sent(tty, info->timeout);
2679 spin_lock_irqsave(&card->card_lock, flags);
2683 /* Waiting for on-board buffers to be empty before closing
2685 void __iomem *base_addr = card->base_addr;
2686 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2687 struct ZFW_CTRL __iomem *zfw_ctrl =
2688 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2689 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2690 int channel = info->line - card->first_line;
2693 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2694 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2696 printk(KERN_DEBUG "cyc:cy_close retval on "
2697 "ttyC%d was %x\n", info->line, retval);
2699 spin_unlock_irqrestore(&card->card_lock, flags);
2700 wait_for_completion_interruptible(&info->shutdown_wait);
2701 spin_lock_irqsave(&card->card_lock, flags);
2706 spin_unlock_irqrestore(&card->card_lock, flags);
2708 cy_flush_buffer(tty);
2709 tty_ldisc_flush(tty);
2710 spin_lock_irqsave(&card->card_lock, flags);
2713 info->port.tty = NULL;
2714 if (info->port.blocked_open) {
2715 spin_unlock_irqrestore(&card->card_lock, flags);
2716 if (info->port.close_delay) {
2717 msleep_interruptible(jiffies_to_msecs
2718 (info->port.close_delay));
2720 wake_up_interruptible(&info->port.open_wait);
2721 spin_lock_irqsave(&card->card_lock, flags);
2723 info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2724 wake_up_interruptible(&info->port.close_wait);
2726 #ifdef CY_DEBUG_OTHER
2727 printk(KERN_DEBUG "cyc:cy_close done\n");
2730 spin_unlock_irqrestore(&card->card_lock, flags);
2733 /* This routine gets called when tty_write has put something into
2734 * the write_queue. The characters may come from user space or
2737 * This routine will return the number of characters actually
2738 * accepted for writing.
2740 * If the port is not already transmitting stuff, start it off by
2741 * enabling interrupts. The interrupt service routine will then
2742 * ensure that the characters are sent.
2743 * If the port is already active, there is no need to kick it.
2746 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2748 struct cyclades_port *info = tty->driver_data;
2749 unsigned long flags;
2753 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2756 if (serial_paranoia_check(info, tty->name, "cy_write"))
2759 if (!info->port.xmit_buf)
2762 spin_lock_irqsave(&info->card->card_lock, flags);
2764 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2765 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
2770 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
2771 info->xmit_head = (info->xmit_head + c) &
2772 (SERIAL_XMIT_SIZE - 1);
2773 info->xmit_cnt += c;
2778 spin_unlock_irqrestore(&info->card->card_lock, flags);
2780 info->idle_stats.xmit_bytes += ret;
2781 info->idle_stats.xmit_idle = jiffies;
2783 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
2790 * This routine is called by the kernel to write a single
2791 * character to the tty device. If the kernel uses this routine,
2792 * it must call the flush_chars() routine (if defined) when it is
2793 * done stuffing characters into the driver. If there is no room
2794 * in the queue, the character is ignored.
2796 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
2798 struct cyclades_port *info = tty->driver_data;
2799 unsigned long flags;
2802 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2805 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2808 if (!info->port.xmit_buf)
2811 spin_lock_irqsave(&info->card->card_lock, flags);
2812 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2813 spin_unlock_irqrestore(&info->card->card_lock, flags);
2817 info->port.xmit_buf[info->xmit_head++] = ch;
2818 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2820 info->idle_stats.xmit_bytes++;
2821 info->idle_stats.xmit_idle = jiffies;
2822 spin_unlock_irqrestore(&info->card->card_lock, flags);
2827 * This routine is called by the kernel after it has written a
2828 * series of characters to the tty device using put_char().
2830 static void cy_flush_chars(struct tty_struct *tty)
2832 struct cyclades_port *info = tty->driver_data;
2835 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2838 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2841 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2842 !info->port.xmit_buf)
2846 } /* cy_flush_chars */
2849 * This routine returns the numbers of characters the tty driver
2850 * will accept for queuing to be written. This number is subject
2851 * to change as output buffers get emptied, or if the output flow
2852 * control is activated.
2854 static int cy_write_room(struct tty_struct *tty)
2856 struct cyclades_port *info = tty->driver_data;
2860 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2863 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2865 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2869 } /* cy_write_room */
2871 static int cy_chars_in_buffer(struct tty_struct *tty)
2873 struct cyclades_card *card;
2874 struct cyclades_port *info = tty->driver_data;
2877 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2881 channel = (info->line) - (card->first_line);
2883 #ifdef Z_EXT_CHARS_IN_BUFFER
2884 if (!cy_is_Z(card)) {
2885 #endif /* Z_EXT_CHARS_IN_BUFFER */
2887 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2888 info->line, info->xmit_cnt);
2890 return info->xmit_cnt;
2891 #ifdef Z_EXT_CHARS_IN_BUFFER
2893 static struct FIRM_ID *firm_id;
2894 static struct ZFW_CTRL *zfw_ctrl;
2895 static struct CH_CTRL *ch_ctrl;
2896 static struct BUF_CTRL *buf_ctrl;
2898 __u32 tx_put, tx_get, tx_bufsize;
2901 firm_id = card->base_addr + ID_ADDRESS;
2902 zfw_ctrl = card->base_addr +
2903 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2904 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2905 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2907 tx_get = readl(&buf_ctrl->tx_get);
2908 tx_put = readl(&buf_ctrl->tx_put);
2909 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2910 if (tx_put >= tx_get)
2911 char_count = tx_put - tx_get;
2913 char_count = tx_put - tx_get + tx_bufsize;
2915 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2916 info->line, info->xmit_cnt + char_count);
2919 return info->xmit_cnt + char_count;
2921 #endif /* Z_EXT_CHARS_IN_BUFFER */
2922 } /* cy_chars_in_buffer */
2925 * ------------------------------------------------------------
2926 * cy_ioctl() and friends
2927 * ------------------------------------------------------------
2930 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2932 int co, co_val, bpr;
2933 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2937 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2941 /* determine which prescaler to use */
2942 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2943 if (cy_clock / co_val / baud > 63)
2947 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2951 info->tbpr = info->rbpr = bpr;
2952 info->tco = info->rco = co;
2956 * This routine finds or computes the various line characteristics.
2957 * It used to be called config_setup
2959 static void set_line_char(struct cyclades_port *info)
2961 struct cyclades_card *card;
2962 unsigned long flags;
2963 void __iomem *base_addr;
2964 int chip, channel, index;
2965 unsigned cflag, iflag;
2966 unsigned short chip_number;
2967 int baud, baud_rate = 0;
2970 if (!info->port.tty || !info->port.tty->termios)
2973 if (info->line == -1)
2976 cflag = info->port.tty->termios->c_cflag;
2977 iflag = info->port.tty->termios->c_iflag;
2980 * Set up the tty->alt_speed kludge
2982 if (info->port.tty) {
2983 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2984 info->port.tty->alt_speed = 57600;
2985 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2986 info->port.tty->alt_speed = 115200;
2987 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2988 info->port.tty->alt_speed = 230400;
2989 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2990 info->port.tty->alt_speed = 460800;
2994 channel = info->line - card->first_line;
2995 chip_number = channel / 4;
2997 if (!cy_is_Z(card)) {
2999 index = card->bus_index;
3002 baud = tty_get_baud_rate(info->port.tty);
3003 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3005 if (info->custom_divisor)
3006 baud_rate = info->baud / info->custom_divisor;
3008 baud_rate = info->baud;
3009 } else if (baud > CD1400_MAX_SPEED) {
3010 baud = CD1400_MAX_SPEED;
3012 /* find the baud index */
3013 for (i = 0; i < 20; i++) {
3014 if (baud == baud_table[i])
3018 i = 19; /* CD1400_MAX_SPEED */
3020 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3022 cyy_baud_calc(info, baud_rate);
3024 if (info->chip_rev >= CD1400_REV_J) {
3025 /* It is a CD1400 rev. J or later */
3026 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3027 info->tco = baud_co_60[i]; /* Tx CO */
3028 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3029 info->rco = baud_co_60[i]; /* Rx CO */
3031 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3032 info->tco = baud_co_25[i]; /* Tx CO */
3033 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3034 info->rco = baud_co_25[i]; /* Rx CO */
3037 if (baud_table[i] == 134) {
3038 /* get it right for 134.5 baud */
3039 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3041 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3043 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3045 } else if (baud_table[i]) {
3046 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3048 /* this needs to be propagated into the card info */
3052 /* By tradition (is it a standard?) a baud rate of zero
3053 implies the line should be/has been closed. A bit
3054 later in this routine such a test is performed. */
3056 /* byte size and parity */
3059 /* receive threshold */
3060 info->cor3 = (info->default_threshold ?
3061 info->default_threshold : baud_cor3[i]);
3063 switch (cflag & CSIZE) {
3065 info->cor1 = Cy_5_BITS;
3068 info->cor1 = Cy_6_BITS;
3071 info->cor1 = Cy_7_BITS;
3074 info->cor1 = Cy_8_BITS;
3078 info->cor1 |= Cy_2_STOP;
3080 if (cflag & PARENB) {
3082 info->cor1 |= CyPARITY_O;
3084 info->cor1 |= CyPARITY_E;
3086 info->cor1 |= CyPARITY_NONE;
3088 /* CTS flow control flag */
3089 if (cflag & CRTSCTS) {
3090 info->port.flags |= ASYNC_CTS_FLOW;
3091 info->cor2 |= CyCtsAE;
3093 info->port.flags &= ~ASYNC_CTS_FLOW;
3094 info->cor2 &= ~CyCtsAE;
3097 info->port.flags &= ~ASYNC_CHECK_CD;
3099 info->port.flags |= ASYNC_CHECK_CD;
3101 /***********************************************
3102 The hardware option, CyRtsAO, presents RTS when
3103 the chip has characters to send. Since most modems
3104 use RTS as reverse (inbound) flow control, this
3105 option is not used. If inbound flow control is
3106 necessary, DTR can be programmed to provide the
3107 appropriate signals for use with a non-standard
3108 cable. Contact Marcio Saito for details.
3109 ***********************************************/
3111 chip = channel >> 2;
3113 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3115 spin_lock_irqsave(&card->card_lock, flags);
3116 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3118 /* tx and rx baud rate */
3120 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3121 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3122 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3123 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3125 /* set line characteristics according configuration */
3127 cy_writeb(base_addr + (CySCHR1 << index),
3128 START_CHAR(info->port.tty));
3129 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->port.tty));
3130 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3131 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3132 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3133 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3134 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3136 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3139 /* !!! Is this needed? */
3140 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3141 cy_writeb(base_addr + (CyRTPR << index),
3142 (info->default_timeout ? info->default_timeout : 0x02));
3143 /* 10ms rx timeout */
3145 if (C_CLOCAL(info->port.tty)) {
3146 /* without modem intr */
3147 cy_writeb(base_addr + (CySRER << index),
3148 readb(base_addr + (CySRER << index)) | CyMdmCh);
3149 /* act on 1->0 modem transitions */
3150 if ((cflag & CRTSCTS) && info->rflow) {
3151 cy_writeb(base_addr + (CyMCOR1 << index),
3152 (CyCTS | rflow_thr[i]));
3154 cy_writeb(base_addr + (CyMCOR1 << index),
3157 /* act on 0->1 modem transitions */
3158 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3160 /* without modem intr */
3161 cy_writeb(base_addr + (CySRER << index),
3163 (CySRER << index)) | CyMdmCh);
3164 /* act on 1->0 modem transitions */
3165 if ((cflag & CRTSCTS) && info->rflow) {
3166 cy_writeb(base_addr + (CyMCOR1 << index),
3167 (CyDSR | CyCTS | CyRI | CyDCD |
3170 cy_writeb(base_addr + (CyMCOR1 << index),
3171 CyDSR | CyCTS | CyRI | CyDCD);
3173 /* act on 0->1 modem transitions */
3174 cy_writeb(base_addr + (CyMCOR2 << index),
3175 CyDSR | CyCTS | CyRI | CyDCD);
3178 if (i == 0) { /* baud rate is zero, turn off line */
3179 if (info->rtsdtr_inv) {
3180 cy_writeb(base_addr + (CyMSVR1 << index),
3183 cy_writeb(base_addr + (CyMSVR2 << index),
3187 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3188 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3189 readb(base_addr + (CyMSVR1 << index)),
3190 readb(base_addr + (CyMSVR2 << index)));
3193 if (info->rtsdtr_inv) {
3194 cy_writeb(base_addr + (CyMSVR1 << index),
3197 cy_writeb(base_addr + (CyMSVR2 << index),
3201 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3202 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3203 readb(base_addr + (CyMSVR1 << index)),
3204 readb(base_addr + (CyMSVR2 << index)));
3209 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
3210 spin_unlock_irqrestore(&card->card_lock, flags);
3213 struct FIRM_ID __iomem *firm_id;
3214 struct ZFW_CTRL __iomem *zfw_ctrl;
3215 struct BOARD_CTRL __iomem *board_ctrl;
3216 struct CH_CTRL __iomem *ch_ctrl;
3217 struct BUF_CTRL __iomem *buf_ctrl;
3221 firm_id = card->base_addr + ID_ADDRESS;
3222 if (!cyz_is_loaded(card))
3225 zfw_ctrl = card->base_addr +
3226 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3227 board_ctrl = &zfw_ctrl->board_ctrl;
3228 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3229 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3232 baud = tty_get_baud_rate(info->port.tty);
3233 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3235 if (info->custom_divisor)
3236 baud_rate = info->baud / info->custom_divisor;
3238 baud_rate = info->baud;
3239 } else if (baud > CYZ_MAX_SPEED) {
3240 baud = CYZ_MAX_SPEED;
3242 cy_writel(&ch_ctrl->comm_baud, baud);
3245 /* get it right for 134.5 baud */
3246 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3248 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3250 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3253 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3255 /* this needs to be propagated into the card info */
3260 /* byte size and parity */
3261 switch (cflag & CSIZE) {
3263 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3266 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3269 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3272 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3275 if (cflag & CSTOPB) {
3276 cy_writel(&ch_ctrl->comm_data_l,
3277 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3279 cy_writel(&ch_ctrl->comm_data_l,
3280 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3282 if (cflag & PARENB) {
3284 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3286 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3288 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3290 /* CTS flow control flag */
3291 if (cflag & CRTSCTS) {
3292 cy_writel(&ch_ctrl->hw_flow,
3293 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3295 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3296 ~(C_RS_CTS | C_RS_RTS));
3298 /* As the HW flow control is done in firmware, the driver
3299 doesn't need to care about it */
3300 info->port.flags &= ~ASYNC_CTS_FLOW;
3302 /* XON/XOFF/XANY flow control flags */
3305 sw_flow |= C_FL_OXX;
3307 sw_flow |= C_FL_OIXANY;
3309 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3311 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3313 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3314 "was %x\n", info->line, retval);
3317 /* CD sensitivity */
3319 info->port.flags &= ~ASYNC_CHECK_CD;
3321 info->port.flags |= ASYNC_CHECK_CD;
3323 if (baud == 0) { /* baud rate is zero, turn off line */
3324 cy_writel(&ch_ctrl->rs_control,
3325 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3327 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3330 cy_writel(&ch_ctrl->rs_control,
3331 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3333 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3337 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3339 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3340 "was %x\n", info->line, retval);
3344 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
3346 } /* set_line_char */
3349 get_serial_info(struct cyclades_port *info,
3350 struct serial_struct __user *retinfo)
3352 struct serial_struct tmp;
3353 struct cyclades_card *cinfo = info->card;
3357 memset(&tmp, 0, sizeof(tmp));
3358 tmp.type = info->type;
3359 tmp.line = info->line;
3360 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3362 tmp.irq = cinfo->irq;
3363 tmp.flags = info->port.flags;
3364 tmp.close_delay = info->port.close_delay;
3365 tmp.closing_wait = info->port.closing_wait;
3366 tmp.baud_base = info->baud;
3367 tmp.custom_divisor = info->custom_divisor;
3368 tmp.hub6 = 0; /*!!! */
3369 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3370 } /* get_serial_info */
3373 set_serial_info(struct cyclades_port *info,
3374 struct serial_struct __user *new_info)
3376 struct serial_struct new_serial;
3377 struct cyclades_port old_info;
3379 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3383 if (!capable(CAP_SYS_ADMIN)) {
3384 if (new_serial.close_delay != info->port.close_delay ||
3385 new_serial.baud_base != info->baud ||
3386 (new_serial.flags & ASYNC_FLAGS &
3388 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3390 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
3391 (new_serial.flags & ASYNC_USR_MASK);
3392 info->baud = new_serial.baud_base;
3393 info->custom_divisor = new_serial.custom_divisor;
3394 goto check_and_exit;
3398 * OK, past this point, all the error checking has been done.
3399 * At this point, we start making changes.....
3402 info->baud = new_serial.baud_base;
3403 info->custom_divisor = new_serial.custom_divisor;
3404 info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
3405 (new_serial.flags & ASYNC_FLAGS);
3406 info->port.close_delay = new_serial.close_delay * HZ / 100;
3407 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
3410 if (info->port.flags & ASYNC_INITIALIZED) {
3411 set_line_char(info);
3414 return startup(info);
3416 } /* set_serial_info */
3419 * get_lsr_info - get line status register info
3421 * Purpose: Let user call ioctl() to get info when the UART physically
3422 * is emptied. On bus types like RS485, the transmitter must
3423 * release the bus after transmitting. This must be done when
3424 * the transmit shift register is empty, not be done when the
3425 * transmit holding register is empty. This functionality
3426 * allows an RS485 driver to be written in user space.
3428 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
3430 struct cyclades_card *card;
3431 int chip, channel, index;
3432 unsigned char status;
3433 unsigned int result;
3434 unsigned long flags;
3435 void __iomem *base_addr;
3438 channel = (info->line) - (card->first_line);
3439 if (!cy_is_Z(card)) {
3440 chip = channel >> 2;
3442 index = card->bus_index;
3443 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3445 spin_lock_irqsave(&card->card_lock, flags);
3446 status = readb(base_addr + (CySRER << index)) &
3447 (CyTxRdy | CyTxMpty);
3448 spin_unlock_irqrestore(&card->card_lock, flags);
3449 result = (status ? 0 : TIOCSER_TEMT);
3451 /* Not supported yet */
3454 return put_user(result, (unsigned long __user *)value);
3457 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3459 struct cyclades_port *info = tty->driver_data;
3460 struct cyclades_card *card;
3461 int chip, channel, index;
3462 void __iomem *base_addr;
3463 unsigned long flags;
3464 unsigned char status;
3465 unsigned long lstatus;
3466 unsigned int result;
3467 struct FIRM_ID __iomem *firm_id;
3468 struct ZFW_CTRL __iomem *zfw_ctrl;
3469 struct BOARD_CTRL __iomem *board_ctrl;
3470 struct CH_CTRL __iomem *ch_ctrl;
3472 if (serial_paranoia_check(info, tty->name, __func__))
3478 channel = info->line - card->first_line;
3479 if (!cy_is_Z(card)) {
3480 chip = channel >> 2;
3482 index = card->bus_index;
3483 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3485 spin_lock_irqsave(&card->card_lock, flags);
3486 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3487 status = readb(base_addr + (CyMSVR1 << index));
3488 status |= readb(base_addr + (CyMSVR2 << index));
3489 spin_unlock_irqrestore(&card->card_lock, flags);
3491 if (info->rtsdtr_inv) {
3492 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3493 ((status & CyDTR) ? TIOCM_RTS : 0);
3495 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3496 ((status & CyDTR) ? TIOCM_DTR : 0);
3498 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3499 ((status & CyRI) ? TIOCM_RNG : 0) |
3500 ((status & CyDSR) ? TIOCM_DSR : 0) |
3501 ((status & CyCTS) ? TIOCM_CTS : 0);
3503 base_addr = card->base_addr;
3504 firm_id = card->base_addr + ID_ADDRESS;
3505 if (cyz_is_loaded(card)) {
3506 zfw_ctrl = card->base_addr +
3507 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3508 board_ctrl = &zfw_ctrl->board_ctrl;
3509 ch_ctrl = zfw_ctrl->ch_ctrl;
3510 lstatus = readl(&ch_ctrl[channel].rs_status);
3511 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3512 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3513 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3514 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3515 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3516 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3529 cy_tiocmset(struct tty_struct *tty, struct file *file,
3530 unsigned int set, unsigned int clear)
3532 struct cyclades_port *info = tty->driver_data;
3533 struct cyclades_card *card;
3534 int chip, channel, index;
3535 void __iomem *base_addr;
3536 unsigned long flags;
3537 struct FIRM_ID __iomem *firm_id;
3538 struct ZFW_CTRL __iomem *zfw_ctrl;
3539 struct BOARD_CTRL __iomem *board_ctrl;
3540 struct CH_CTRL __iomem *ch_ctrl;
3543 if (serial_paranoia_check(info, tty->name, __func__))
3547 channel = (info->line) - (card->first_line);
3548 if (!cy_is_Z(card)) {
3549 chip = channel >> 2;
3551 index = card->bus_index;
3552 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3554 if (set & TIOCM_RTS) {
3555 spin_lock_irqsave(&card->card_lock, flags);
3556 cy_writeb(base_addr + (CyCAR << index),
3558 if (info->rtsdtr_inv) {
3559 cy_writeb(base_addr + (CyMSVR2 << index),
3562 cy_writeb(base_addr + (CyMSVR1 << index),
3565 spin_unlock_irqrestore(&card->card_lock, flags);
3567 if (clear & TIOCM_RTS) {
3568 spin_lock_irqsave(&card->card_lock, flags);
3569 cy_writeb(base_addr + (CyCAR << index),
3571 if (info->rtsdtr_inv) {
3572 cy_writeb(base_addr + (CyMSVR2 << index),
3575 cy_writeb(base_addr + (CyMSVR1 << index),
3578 spin_unlock_irqrestore(&card->card_lock, flags);
3580 if (set & TIOCM_DTR) {
3581 spin_lock_irqsave(&card->card_lock, flags);
3582 cy_writeb(base_addr + (CyCAR << index),
3584 if (info->rtsdtr_inv) {
3585 cy_writeb(base_addr + (CyMSVR1 << index),
3588 cy_writeb(base_addr + (CyMSVR2 << index),
3592 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3593 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3594 readb(base_addr + (CyMSVR1 << index)),
3595 readb(base_addr + (CyMSVR2 << index)));
3597 spin_unlock_irqrestore(&card->card_lock, flags);
3599 if (clear & TIOCM_DTR) {
3600 spin_lock_irqsave(&card->card_lock, flags);
3601 cy_writeb(base_addr + (CyCAR << index),
3603 if (info->rtsdtr_inv) {
3604 cy_writeb(base_addr + (CyMSVR1 << index),
3607 cy_writeb(base_addr + (CyMSVR2 << index),
3612 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3613 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3614 readb(base_addr + (CyMSVR1 << index)),
3615 readb(base_addr + (CyMSVR2 << index)));
3617 spin_unlock_irqrestore(&card->card_lock, flags);
3620 base_addr = card->base_addr;
3622 firm_id = card->base_addr + ID_ADDRESS;
3623 if (cyz_is_loaded(card)) {
3624 zfw_ctrl = card->base_addr +
3625 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3626 board_ctrl = &zfw_ctrl->board_ctrl;
3627 ch_ctrl = zfw_ctrl->ch_ctrl;
3629 if (set & TIOCM_RTS) {
3630 spin_lock_irqsave(&card->card_lock, flags);
3631 cy_writel(&ch_ctrl[channel].rs_control,
3632 readl(&ch_ctrl[channel].rs_control) |
3634 spin_unlock_irqrestore(&card->card_lock, flags);
3636 if (clear & TIOCM_RTS) {
3637 spin_lock_irqsave(&card->card_lock, flags);
3638 cy_writel(&ch_ctrl[channel].rs_control,
3639 readl(&ch_ctrl[channel].rs_control) &
3641 spin_unlock_irqrestore(&card->card_lock, flags);
3643 if (set & TIOCM_DTR) {
3644 spin_lock_irqsave(&card->card_lock, flags);
3645 cy_writel(&ch_ctrl[channel].rs_control,
3646 readl(&ch_ctrl[channel].rs_control) |
3649 printk(KERN_DEBUG "cyc:set_modem_info raising "
3652 spin_unlock_irqrestore(&card->card_lock, flags);
3654 if (clear & TIOCM_DTR) {
3655 spin_lock_irqsave(&card->card_lock, flags);
3656 cy_writel(&ch_ctrl[channel].rs_control,
3657 readl(&ch_ctrl[channel].rs_control) &
3660 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3663 spin_unlock_irqrestore(&card->card_lock, flags);
3668 spin_lock_irqsave(&card->card_lock, flags);
3669 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3671 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3672 "was %x\n", info->line, retval);
3674 spin_unlock_irqrestore(&card->card_lock, flags);
3680 * cy_break() --- routine which turns the break handling on or off
3682 static int cy_break(struct tty_struct *tty, int break_state)
3684 struct cyclades_port *info = tty->driver_data;
3685 struct cyclades_card *card;
3686 unsigned long flags;
3689 if (serial_paranoia_check(info, tty->name, "cy_break"))
3694 spin_lock_irqsave(&card->card_lock, flags);
3695 if (!cy_is_Z(card)) {
3696 /* Let the transmit ISR take care of this (since it
3697 requires stuffing characters into the output stream).
3699 if (break_state == -1) {
3700 if (!info->breakon) {
3702 if (!info->xmit_cnt) {
3703 spin_unlock_irqrestore(&card->card_lock, flags);
3705 spin_lock_irqsave(&card->card_lock, flags);
3709 if (!info->breakoff) {
3711 if (!info->xmit_cnt) {
3712 spin_unlock_irqrestore(&card->card_lock, flags);
3714 spin_lock_irqsave(&card->card_lock, flags);
3719 if (break_state == -1) {
3720 retval = cyz_issue_cmd(card,
3721 info->line - card->first_line,
3722 C_CM_SET_BREAK, 0L);
3724 printk(KERN_ERR "cyc:cy_break (set) retval on "
3725 "ttyC%d was %x\n", info->line, retval);
3728 retval = cyz_issue_cmd(card,
3729 info->line - card->first_line,
3730 C_CM_CLR_BREAK, 0L);
3732 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3733 "on ttyC%d was %x\n", info->line,
3738 spin_unlock_irqrestore(&card->card_lock, flags);
3742 static int get_mon_info(struct cyclades_port *info,
3743 struct cyclades_monitor __user *mon)
3746 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3748 info->mon.int_count = 0;
3749 info->mon.char_count = 0;
3750 info->mon.char_max = 0;
3751 info->mon.char_last = 0;
3753 } /* get_mon_info */
3755 static int set_threshold(struct cyclades_port *info, unsigned long value)
3757 struct cyclades_card *card;
3758 void __iomem *base_addr;
3759 int channel, chip, index;
3760 unsigned long flags;
3763 channel = info->line - card->first_line;
3764 if (!cy_is_Z(card)) {
3765 chip = channel >> 2;
3767 index = card->bus_index;
3769 card->base_addr + (cy_chip_offset[chip] << index);
3771 info->cor3 &= ~CyREC_FIFO;
3772 info->cor3 |= value & CyREC_FIFO;
3774 spin_lock_irqsave(&card->card_lock, flags);
3775 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3776 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3777 spin_unlock_irqrestore(&card->card_lock, flags);
3780 } /* set_threshold */
3782 static int get_threshold(struct cyclades_port *info,
3783 unsigned long __user *value)
3785 struct cyclades_card *card;
3786 void __iomem *base_addr;
3787 int channel, chip, index;
3791 channel = info->line - card->first_line;
3792 if (!cy_is_Z(card)) {
3793 chip = channel >> 2;
3795 index = card->bus_index;
3796 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3798 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3799 return put_user(tmp, value);
3802 } /* get_threshold */
3804 static int set_default_threshold(struct cyclades_port *info,
3805 unsigned long value)
3807 info->default_threshold = value & 0x0f;
3809 } /* set_default_threshold */
3811 static int get_default_threshold(struct cyclades_port *info,
3812 unsigned long __user *value)
3814 return put_user(info->default_threshold, value);
3815 } /* get_default_threshold */
3817 static int set_timeout(struct cyclades_port *info, unsigned long value)
3819 struct cyclades_card *card;
3820 void __iomem *base_addr;
3821 int channel, chip, index;
3822 unsigned long flags;
3825 channel = info->line - card->first_line;
3826 if (!cy_is_Z(card)) {
3827 chip = channel >> 2;
3829 index = card->bus_index;
3830 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3832 spin_lock_irqsave(&card->card_lock, flags);
3833 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3834 spin_unlock_irqrestore(&card->card_lock, flags);
3839 static int get_timeout(struct cyclades_port *info,
3840 unsigned long __user *value)
3842 struct cyclades_card *card;
3843 void __iomem *base_addr;
3844 int channel, chip, index;
3848 channel = info->line - card->first_line;
3849 if (!cy_is_Z(card)) {
3850 chip = channel >> 2;
3852 index = card->bus_index;
3853 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3855 tmp = readb(base_addr + (CyRTPR << index));
3856 return put_user(tmp, value);
3861 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3863 info->default_timeout = value & 0xff;
3865 } /* set_default_timeout */
3867 static int get_default_timeout(struct cyclades_port *info,
3868 unsigned long __user *value)
3870 return put_user(info->default_timeout, value);
3871 } /* get_default_timeout */
3874 * This routine allows the tty driver to implement device-
3875 * specific ioctl's. If the ioctl number passed in cmd is
3876 * not recognized by the driver, it should return ENOIOCTLCMD.
3879 cy_ioctl(struct tty_struct *tty, struct file *file,
3880 unsigned int cmd, unsigned long arg)
3882 struct cyclades_port *info = tty->driver_data;
3883 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3884 struct serial_icounter_struct __user *p_cuser; /* user space */
3886 unsigned long flags;
3887 void __user *argp = (void __user *)arg;
3889 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3892 #ifdef CY_DEBUG_OTHER
3893 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3894 info->line, cmd, arg);
3900 ret_val = get_mon_info(info, argp);
3903 ret_val = get_threshold(info, argp);
3906 ret_val = set_threshold(info, arg);
3908 case CYGETDEFTHRESH:
3909 ret_val = get_default_threshold(info, argp);
3911 case CYSETDEFTHRESH:
3912 ret_val = set_default_threshold(info, arg);
3915 ret_val = get_timeout(info, argp);
3918 ret_val = set_timeout(info, arg);
3920 case CYGETDEFTIMEOUT:
3921 ret_val = get_default_timeout(info, argp);
3923 case CYSETDEFTIMEOUT:
3924 ret_val = set_default_timeout(info, arg);
3927 info->rflow = (int)arg;
3931 ret_val = info->rflow;
3933 case CYSETRTSDTR_INV:
3934 info->rtsdtr_inv = (int)arg;
3937 case CYGETRTSDTR_INV:
3938 ret_val = info->rtsdtr_inv;
3940 case CYGETCD1400VER:
3941 ret_val = info->chip_rev;
3943 #ifndef CONFIG_CYZ_INTR
3944 case CYZSETPOLLCYCLE:
3945 cyz_polling_cycle = (arg * HZ) / 1000;
3948 case CYZGETPOLLCYCLE:
3949 ret_val = (cyz_polling_cycle * 1000) / HZ;
3951 #endif /* CONFIG_CYZ_INTR */
3953 info->port.closing_wait = (unsigned short)arg * HZ / 100;
3957 ret_val = info->port.closing_wait / (HZ / 100);
3960 ret_val = get_serial_info(info, argp);
3963 ret_val = set_serial_info(info, argp);
3965 case TIOCSERGETLSR: /* Get line status register */
3966 ret_val = get_lsr_info(info, argp);
3969 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3970 * - mask passed in arg for lines of interest
3971 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3972 * Caller should use TIOCGICOUNT to see which one it was
3975 spin_lock_irqsave(&info->card->card_lock, flags);
3976 /* note the counters on entry */
3977 cnow = info->icount;
3978 spin_unlock_irqrestore(&info->card->card_lock, flags);
3979 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
3981 spin_lock_irqsave(&info->card->card_lock, flags);
3982 cnow = info->icount; /* atomic copy */
3983 spin_unlock_irqrestore(&info->card->card_lock, flags);
3985 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
3986 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
3987 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
3988 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
3993 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
3994 * Return: write counters to the user passed counter struct
3995 * NB: both 1->0 and 0->1 transitions are counted except for
3996 * RI where only 0->1 is counted.
3999 spin_lock_irqsave(&info->card->card_lock, flags);
4000 cnow = info->icount;
4001 spin_unlock_irqrestore(&info->card->card_lock, flags);
4003 ret_val = put_user(cnow.cts, &p_cuser->cts);
4006 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4009 ret_val = put_user(cnow.rng, &p_cuser->rng);
4012 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4015 ret_val = put_user(cnow.rx, &p_cuser->rx);
4018 ret_val = put_user(cnow.tx, &p_cuser->tx);
4021 ret_val = put_user(cnow.frame, &p_cuser->frame);
4024 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4027 ret_val = put_user(cnow.parity, &p_cuser->parity);
4030 ret_val = put_user(cnow.brk, &p_cuser->brk);
4033 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4039 ret_val = -ENOIOCTLCMD;
4043 #ifdef CY_DEBUG_OTHER
4044 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4050 * This routine allows the tty driver to be notified when
4051 * device's termios settings have changed. Note that a
4052 * well-designed tty driver should be prepared to accept the case
4053 * where old == NULL, and try to do something rational.
4055 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4057 struct cyclades_port *info = tty->driver_data;
4059 #ifdef CY_DEBUG_OTHER
4060 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4063 set_line_char(info);
4065 if ((old_termios->c_cflag & CRTSCTS) &&
4066 !(tty->termios->c_cflag & CRTSCTS)) {
4067 tty->hw_stopped = 0;
4072 * No need to wake up processes in open wait, since they
4073 * sample the CLOCAL flag once, and don't recheck it.
4074 * XXX It's not clear whether the current behavior is correct
4075 * or not. Hence, this may change.....
4077 if (!(old_termios->c_cflag & CLOCAL) &&
4078 (tty->termios->c_cflag & CLOCAL))
4079 wake_up_interruptible(&info->port.open_wait);
4081 } /* cy_set_termios */
4083 /* This function is used to send a high-priority XON/XOFF character to
4086 static void cy_send_xchar(struct tty_struct *tty, char ch)
4088 struct cyclades_port *info = tty->driver_data;
4089 struct cyclades_card *card;
4092 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4101 channel = info->line - card->first_line;
4103 if (cy_is_Z(card)) {
4104 if (ch == STOP_CHAR(tty))
4105 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4106 else if (ch == START_CHAR(tty))
4107 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4111 /* This routine is called by the upper-layer tty layer to signal
4112 that incoming characters should be throttled because the input
4113 buffers are close to full.
4115 static void cy_throttle(struct tty_struct *tty)
4117 struct cyclades_port *info = tty->driver_data;
4118 struct cyclades_card *card;
4119 unsigned long flags;
4120 void __iomem *base_addr;
4121 int chip, channel, index;
4123 #ifdef CY_DEBUG_THROTTLE
4126 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4127 tty->ldisc.chars_in_buffer(tty), info->line);
4130 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
4137 cy_send_xchar(tty, STOP_CHAR(tty));
4142 if (tty->termios->c_cflag & CRTSCTS) {
4143 channel = info->line - card->first_line;
4144 if (!cy_is_Z(card)) {
4145 chip = channel >> 2;
4147 index = card->bus_index;
4148 base_addr = card->base_addr +
4149 (cy_chip_offset[chip] << index);
4151 spin_lock_irqsave(&card->card_lock, flags);
4152 cy_writeb(base_addr + (CyCAR << index),
4154 if (info->rtsdtr_inv) {
4155 cy_writeb(base_addr + (CyMSVR2 << index),
4158 cy_writeb(base_addr + (CyMSVR1 << index),
4161 spin_unlock_irqrestore(&card->card_lock, flags);
4169 * This routine notifies the tty driver that it should signal
4170 * that characters can now be sent to the tty without fear of
4171 * overrunning the input buffers of the line disciplines.
4173 static void cy_unthrottle(struct tty_struct *tty)
4175 struct cyclades_port *info = tty->driver_data;
4176 struct cyclades_card *card;
4177 unsigned long flags;
4178 void __iomem *base_addr;
4179 int chip, channel, index;
4181 #ifdef CY_DEBUG_THROTTLE
4184 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4185 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
4188 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
4195 cy_send_xchar(tty, START_CHAR(tty));
4198 if (tty->termios->c_cflag & CRTSCTS) {
4200 channel = info->line - card->first_line;
4201 if (!cy_is_Z(card)) {
4202 chip = channel >> 2;
4204 index = card->bus_index;
4205 base_addr = card->base_addr +
4206 (cy_chip_offset[chip] << index);
4208 spin_lock_irqsave(&card->card_lock, flags);
4209 cy_writeb(base_addr + (CyCAR << index),
4211 if (info->rtsdtr_inv) {
4212 cy_writeb(base_addr + (CyMSVR2 << index),
4215 cy_writeb(base_addr + (CyMSVR1 << index),
4218 spin_unlock_irqrestore(&card->card_lock, flags);
4223 } /* cy_unthrottle */
4225 /* cy_start and cy_stop provide software output flow control as a
4226 function of XON/XOFF, software CTS, and other such stuff.
4228 static void cy_stop(struct tty_struct *tty)
4230 struct cyclades_card *cinfo;
4231 struct cyclades_port *info = tty->driver_data;
4232 void __iomem *base_addr;
4233 int chip, channel, index;
4234 unsigned long flags;
4236 #ifdef CY_DEBUG_OTHER
4237 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4240 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4244 channel = info->line - cinfo->first_line;
4245 if (!cy_is_Z(cinfo)) {
4246 index = cinfo->bus_index;
4247 chip = channel >> 2;
4249 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4251 spin_lock_irqsave(&cinfo->card_lock, flags);
4252 cy_writeb(base_addr + (CyCAR << index),
4253 (u_char)(channel & 0x0003)); /* index channel */
4254 cy_writeb(base_addr + (CySRER << index),
4255 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4256 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4260 static void cy_start(struct tty_struct *tty)
4262 struct cyclades_card *cinfo;
4263 struct cyclades_port *info = tty->driver_data;
4264 void __iomem *base_addr;
4265 int chip, channel, index;
4266 unsigned long flags;
4268 #ifdef CY_DEBUG_OTHER
4269 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4272 if (serial_paranoia_check(info, tty->name, "cy_start"))
4276 channel = info->line - cinfo->first_line;
4277 index = cinfo->bus_index;
4278 if (!cy_is_Z(cinfo)) {
4279 chip = channel >> 2;
4281 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4283 spin_lock_irqsave(&cinfo->card_lock, flags);
4284 cy_writeb(base_addr + (CyCAR << index),
4285 (u_char) (channel & 0x0003)); /* index channel */
4286 cy_writeb(base_addr + (CySRER << index),
4287 readb(base_addr + (CySRER << index)) | CyTxRdy);
4288 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4293 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4295 static void cy_hangup(struct tty_struct *tty)
4297 struct cyclades_port *info = tty->driver_data;
4299 #ifdef CY_DEBUG_OTHER
4300 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4303 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4306 cy_flush_buffer(tty);
4308 info->port.count = 0;
4309 #ifdef CY_DEBUG_COUNT
4310 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4313 info->port.tty = NULL;
4314 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
4315 wake_up_interruptible(&info->port.open_wait);
4319 * ---------------------------------------------------------------------
4320 * cy_init() and friends
4322 * cy_init() is called at boot-time to initialize the serial driver.
4323 * ---------------------------------------------------------------------
4326 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4328 struct cyclades_port *info;
4330 unsigned short chip_number;
4332 spin_lock_init(&cinfo->card_lock);
4333 cinfo->intr_enabled = 0;
4335 cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
4337 if (cinfo->ports == NULL) {
4338 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4342 for (port = cinfo->first_line; port < cinfo->first_line + cinfo->nports;
4344 info = &cinfo->ports[port - cinfo->first_line];
4345 tty_port_init(&info->port);
4346 info->magic = CYCLADES_MAGIC;
4350 info->port.closing_wait = CLOSING_WAIT_DELAY;
4351 info->port.close_delay = 5 * HZ / 10;
4352 info->port.flags = STD_COM_FLAGS;
4353 init_completion(&info->shutdown_wait);
4354 init_waitqueue_head(&info->delta_msr_wait);
4356 if (cy_is_Z(cinfo)) {
4357 info->type = PORT_STARTECH;
4358 if (cinfo->hw_ver == ZO_V1)
4359 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4361 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4362 #ifdef CONFIG_CYZ_INTR
4363 setup_timer(&cyz_rx_full_timer[port],
4364 cyz_rx_restart, (unsigned long)info);
4367 int index = cinfo->bus_index;
4368 info->type = PORT_CIRRUS;
4369 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4370 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4372 info->cor3 = 0x08; /* _very_ small rcv threshold */
4374 chip_number = (port - cinfo->first_line) / 4;
4375 info->chip_rev = readb(cinfo->base_addr +
4376 (cy_chip_offset[chip_number] << index) +
4377 (CyGFRCR << index));
4379 if (info->chip_rev >= CD1400_REV_J) {
4380 /* It is a CD1400 rev. J or later */
4381 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4382 info->tco = baud_co_60[13]; /* Tx CO */
4383 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4384 info->rco = baud_co_60[13]; /* Rx CO */
4385 info->rtsdtr_inv = 1;
4387 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4388 info->tco = baud_co_25[13]; /* Tx CO */
4389 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4390 info->rco = baud_co_25[13]; /* Rx CO */
4391 info->rtsdtr_inv = 0;
4393 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4394 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4399 #ifndef CONFIG_CYZ_INTR
4400 if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
4401 mod_timer(&cyz_timerlist, jiffies + 1);
4403 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4410 /* initialize chips on Cyclom-Y card -- return number of valid
4411 chips (which is number of ports/4) */
4412 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4415 unsigned int chip_number;
4416 void __iomem *base_addr;
4418 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4419 /* Cy_HwReset is 0x1400 */
4420 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4421 /* Cy_ClrIntr is 0x1800 */
4424 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4427 true_base_addr + (cy_chip_offset[chip_number] << index);
4429 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4431 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4432 chip_number, (unsigned long)base_addr);
4437 cy_writeb(base_addr + (CyGFRCR << index), 0);
4440 /* The Cyclom-16Y does not decode address bit 9 and therefore
4441 cannot distinguish between references to chip 0 and a non-
4442 existent chip 4. If the preceding clearing of the supposed
4443 chip 4 GFRCR register appears at chip 0, there is no chip 4
4444 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4446 if (chip_number == 4 && readb(true_base_addr +
4447 (cy_chip_offset[0] << index) +
4448 (CyGFRCR << index)) == 0) {
4452 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4455 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4457 printk(" chip #%d at %#6lx is not responding ",
4458 chip_number, (unsigned long)base_addr);
4459 printk("(GFRCR stayed 0)\n",
4463 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4466 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4468 chip_number, (unsigned long)base_addr,
4469 base_addr[CyGFRCR<<index]);
4473 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4474 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4475 /* It is a CD1400 rev. J or later */
4476 /* Impossible to reach 5ms with this chip.
4477 Changed to 2ms instead (f = 500 Hz). */
4478 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4481 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4485 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4486 chip_number, (unsigned long)base_addr,
4487 readb(base_addr+(CyGFRCR<<index)));
4491 } /* cyy_init_card */
4494 * ---------------------------------------------------------------------
4495 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4496 * sets global variables and return the number of ISA boards found.
4497 * ---------------------------------------------------------------------
4499 static int __init cy_detect_isa(void)
4502 unsigned short cy_isa_irq, nboard;
4503 void __iomem *cy_isa_address;
4504 unsigned short i, j, cy_isa_nchan;
4512 /* Check for module parameters */
4513 for (i = 0; i < NR_CARDS; i++) {
4514 if (maddr[i] || i) {
4516 cy_isa_addresses[i] = maddr[i];
4523 /* scan the address table probing for Cyclom-Y/ISA boards */
4524 for (i = 0; i < NR_ISA_ADDRS; i++) {
4525 unsigned int isa_address = cy_isa_addresses[i];
4526 if (isa_address == 0x0000)
4529 /* probe for CD1400... */
4530 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
4531 if (cy_isa_address == NULL) {
4532 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4536 cy_isa_nchan = CyPORTS_PER_CHIP *
4537 cyy_init_card(cy_isa_address, 0);
4538 if (cy_isa_nchan == 0) {
4539 iounmap(cy_isa_address);
4543 if (isparam && irq[i])
4544 cy_isa_irq = irq[i];
4547 /* find out the board's irq by probing */
4548 cy_isa_irq = detect_isa_irq(cy_isa_address);
4549 if (cy_isa_irq == 0) {
4550 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4551 "IRQ could not be detected.\n",
4552 (unsigned long)cy_isa_address);
4553 iounmap(cy_isa_address);
4557 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4558 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4559 "more channels are available. Change NR_PORTS "
4560 "in cyclades.c and recompile kernel.\n",
4561 (unsigned long)cy_isa_address);
4562 iounmap(cy_isa_address);
4565 /* fill the next cy_card structure available */
4566 for (j = 0; j < NR_CARDS; j++) {
4567 if (cy_card[j].base_addr == NULL)
4570 if (j == NR_CARDS) { /* no more cy_cards available */
4571 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4572 "more cards can be used. Change NR_CARDS in "
4573 "cyclades.c and recompile kernel.\n",
4574 (unsigned long)cy_isa_address);
4575 iounmap(cy_isa_address);
4580 if (request_irq(cy_isa_irq, cyy_interrupt,
4581 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4582 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4583 "could not allocate IRQ#%d.\n",
4584 (unsigned long)cy_isa_address, cy_isa_irq);
4585 iounmap(cy_isa_address);
4590 cy_card[j].base_addr = cy_isa_address;
4591 cy_card[j].ctl_addr.p9050 = NULL;
4592 cy_card[j].irq = (int)cy_isa_irq;
4593 cy_card[j].bus_index = 0;
4594 cy_card[j].first_line = cy_next_channel;
4595 cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
4596 cy_card[j].nports = cy_isa_nchan;
4597 if (cy_init_card(&cy_card[j])) {
4598 cy_card[j].base_addr = NULL;
4599 free_irq(cy_isa_irq, &cy_card[j]);
4600 iounmap(cy_isa_address);
4605 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4606 "%d channels starting from port %d\n",
4607 j + 1, (unsigned long)cy_isa_address,
4608 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4609 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4611 for (j = cy_next_channel;
4612 j < cy_next_channel + cy_isa_nchan; j++)
4613 tty_register_device(cy_serial_driver, j, NULL);
4614 cy_next_channel += cy_isa_nchan;
4619 #endif /* CONFIG_ISA */
4620 } /* cy_detect_isa */
4623 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4627 for (a = 0; a < size && *str; a++, str++)
4631 for (; a < size; a++, str++)
4638 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
4641 for (; size > 0; size--) {
4642 cy_writel(fpga, *data++);
4647 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4648 struct RUNTIME_9060 __iomem *addr)
4651 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4653 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4655 /* Reload Config. Registers from EEPROM */
4656 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4658 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4660 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4661 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4662 * registers. This will remain here until we find a permanent fix.
4664 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4667 static int __devinit __cyz_load_fw(const struct firmware *fw,
4668 const char *name, const u32 mailbox, void __iomem *base,
4671 const void *ptr = fw->data;
4672 const struct zfile_header *h = ptr;
4673 const struct zfile_config *c, *cs;
4674 const struct zfile_block *b, *bs;
4675 unsigned int a, tmp, len = fw->size;
4676 #define BAD_FW KERN_ERR "Bad firmware: "
4677 if (len < sizeof(*h)) {
4678 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4682 cs = ptr + h->config_offset;
4683 bs = ptr + h->block_offset;
4685 if ((void *)(cs + h->n_config) > ptr + len ||
4686 (void *)(bs + h->n_blocks) > ptr + len) {
4687 printk(BAD_FW "too short");
4691 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4692 cyc_isfwstr(h->date, sizeof(h->date))) {
4693 printk(BAD_FW "bad formatted header string\n");
4697 if (strncmp(name, h->name, sizeof(h->name))) {
4698 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4703 for (c = cs; c < cs + h->n_config; c++) {
4704 for (a = 0; a < c->n_blocks; a++)
4705 if (c->block_list[a] > h->n_blocks) {
4706 printk(BAD_FW "bad block ref number in cfgs\n");
4709 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4713 printk(BAD_FW "nothing appropriate\n");
4717 for (b = bs; b < bs + h->n_blocks; b++)
4718 if (b->file_offset + b->size > len) {
4719 printk(BAD_FW "bad block data offset\n");
4723 /* everything is OK, let's seek'n'load it */
4724 for (c = cs; c < cs + h->n_config; c++)
4725 if (c->mailbox == mailbox && c->function == 0)
4728 for (a = 0; a < c->n_blocks; a++) {
4729 b = &bs[c->block_list[a]];
4730 if (b->type == ZBLOCK_FPGA) {
4732 cyz_fpga_copy(fpga, ptr + b->file_offset,
4736 memcpy_toio(base + b->ram_offset,
4737 ptr + b->file_offset, b->size);
4744 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4745 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4747 const struct firmware *fw;
4748 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4749 struct CUSTOM_REG __iomem *cust = base_addr;
4750 struct ZFW_CTRL __iomem *pt_zfwctrl;
4752 u32 mailbox, status, nchan;
4756 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4758 dev_err(&pdev->dev, "can't get firmware\n");
4762 /* Check whether the firmware is already loaded and running. If
4763 positive, skip this board */
4764 if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4765 u32 cntval = readl(base_addr + 0x190);
4768 if (cntval != readl(base_addr + 0x190)) {
4769 /* FW counter is working, FW is running */
4770 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4771 "Skipping board.\n");
4778 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4781 mailbox = readl(&ctl_addr->mail_box_0);
4783 if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
4784 /* stops CPU and set window to beginning of RAM */
4785 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4786 cy_writel(&cust->cpu_stop, 0);
4787 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4791 plx_init(pdev, irq, ctl_addr);
4795 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4799 if (!__cyz_fpga_loaded(ctl_addr)) {
4800 dev_err(&pdev->dev, "fw upload successful, but fw is "
4806 /* stops CPU and set window to beginning of RAM */
4807 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4808 cy_writel(&cust->cpu_stop, 0);
4809 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4813 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4814 cy_writeb(tmp, 255);
4816 /* set window to last 512K of RAM */
4817 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4818 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4819 cy_writeb(tmp, 255);
4820 /* set window to beginning of RAM */
4821 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4824 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4825 release_firmware(fw);
4829 /* finish boot and start boards */
4830 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4831 cy_writel(&cust->cpu_start, 0);
4832 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4834 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4836 if (status != ZFIRM_ID) {
4837 if (status == ZFIRM_HLT) {
4838 dev_err(&pdev->dev, "you need an external power supply "
4839 "for this number of ports. Firmware halted and "
4844 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4845 "some more time\n", status);
4846 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4849 if (status != ZFIRM_ID) {
4850 dev_err(&pdev->dev, "Board not started in 20 seconds! "
4851 "Giving up. (fid->signature = 0x%x)\n",
4853 dev_info(&pdev->dev, "*** Warning ***: if you are "
4854 "upgrading the FW, please power cycle the "
4855 "system before loading the new FW to the "
4858 if (__cyz_fpga_loaded(ctl_addr))
4859 plx_init(pdev, irq, ctl_addr);
4864 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4867 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4869 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4870 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4871 base_addr + readl(&fid->zfwctrl_addr));
4873 nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
4874 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4875 readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
4878 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4879 "check the connection between the Z host card and the "
4880 "serial expanders.\n");
4882 if (__cyz_fpga_loaded(ctl_addr))
4883 plx_init(pdev, irq, ctl_addr);
4885 dev_info(&pdev->dev, "Null number of ports detected. Board "
4891 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4892 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4895 Early firmware failed to start looking for commands.
4896 This enables firmware interrupts for those commands.
4898 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4900 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4905 release_firmware(fw);
4910 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4911 const struct pci_device_id *ent)
4913 void __iomem *addr0 = NULL, *addr2 = NULL;
4914 char *card_name = NULL;
4915 u32 uninitialized_var(mailbox);
4916 unsigned int device_id, nchan = 0, card_no, i;
4917 unsigned char plx_ver;
4920 retval = pci_enable_device(pdev);
4922 dev_err(&pdev->dev, "cannot enable device\n");
4926 /* read PCI configuration area */
4928 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4930 #if defined(__alpha__)
4931 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4932 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4933 "addresses on Alpha systems.\n");
4938 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4939 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4945 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4946 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4948 pdev->resource[2].flags &= ~IORESOURCE_IO;
4951 retval = pci_request_regions(pdev, "cyclades");
4953 dev_err(&pdev->dev, "failed to reserve resources\n");
4958 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4959 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4960 card_name = "Cyclom-Y";
4962 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
4964 if (addr0 == NULL) {
4965 dev_err(&pdev->dev, "can't remap ctl region\n");
4968 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
4970 if (addr2 == NULL) {
4971 dev_err(&pdev->dev, "can't remap base region\n");
4975 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
4977 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
4978 "Serial-Modules\n");
4981 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4982 struct RUNTIME_9060 __iomem *ctl_addr;
4984 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
4986 if (addr0 == NULL) {
4987 dev_err(&pdev->dev, "can't remap ctl region\n");
4991 /* Disable interrupts on the PLX before resetting it */
4992 cy_writew(&ctl_addr->intr_ctrl_stat,
4993 readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
4995 plx_init(pdev, irq, addr0);
4997 mailbox = readl(&ctl_addr->mail_box_0);
4999 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
5000 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
5001 if (addr2 == NULL) {
5002 dev_err(&pdev->dev, "can't remap base region\n");
5006 if (mailbox == ZE_V1) {
5007 card_name = "Cyclades-Ze";
5009 card_name = "Cyclades-8Zo";
5011 if (mailbox == ZO_V1) {
5012 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5013 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5014 "id %lx, ver %lx\n", (ulong)(0xff &
5015 readl(&((struct CUSTOM_REG *)addr2)->
5016 fpga_id)), (ulong)(0xff &
5017 readl(&((struct CUSTOM_REG *)addr2)->
5019 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5021 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5022 "Cyclades-Z board. FPGA not loaded\n");
5025 /* The following clears the firmware id word. This
5026 ensures that the driver will not attempt to talk to
5027 the board until it has been properly initialized.
5029 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5030 cy_writel(addr2 + ID_ADDRESS, 0L);
5033 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5039 if ((cy_next_channel + nchan) > NR_PORTS) {
5040 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5041 "channels are available. Change NR_PORTS in "
5042 "cyclades.c and recompile kernel.\n");
5045 /* fill the next cy_card structure available */
5046 for (card_no = 0; card_no < NR_CARDS; card_no++) {
5047 if (cy_card[card_no].base_addr == NULL)
5050 if (card_no == NR_CARDS) { /* no more cy_cards available */
5051 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5052 "more cards can be used. Change NR_CARDS in "
5053 "cyclades.c and recompile kernel.\n");
5057 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5058 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5060 retval = request_irq(irq, cyy_interrupt,
5061 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5063 dev_err(&pdev->dev, "could not allocate IRQ\n");
5066 cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP;
5068 cy_card[card_no].hw_ver = mailbox;
5069 cy_card[card_no].num_chips = (unsigned int)-1;
5070 #ifdef CONFIG_CYZ_INTR
5071 /* allocate IRQ only if board has an IRQ */
5072 if (irq != 0 && irq != 255) {
5073 retval = request_irq(irq, cyz_interrupt,
5074 IRQF_SHARED, "Cyclades-Z",
5077 dev_err(&pdev->dev, "could not allocate IRQ\n");
5081 #endif /* CONFIG_CYZ_INTR */
5085 cy_card[card_no].base_addr = addr2;
5086 cy_card[card_no].ctl_addr.p9050 = addr0;
5087 cy_card[card_no].irq = irq;
5088 cy_card[card_no].bus_index = 1;
5089 cy_card[card_no].first_line = cy_next_channel;
5090 cy_card[card_no].nports = nchan;
5091 retval = cy_init_card(&cy_card[card_no]);
5095 pci_set_drvdata(pdev, &cy_card[card_no]);
5097 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5098 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5099 /* enable interrupts in the PCI interface */
5100 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5103 cy_writeb(addr0 + 0x4c, 0x43);
5108 default: /* Old boards, use PLX_9060 */
5110 struct RUNTIME_9060 __iomem *ctl_addr = addr0;
5111 plx_init(pdev, irq, ctl_addr);
5112 cy_writew(&ctl_addr->intr_ctrl_stat,
5113 readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
5119 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5120 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5121 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5122 tty_register_device(cy_serial_driver, i, &pdev->dev);
5123 cy_next_channel += nchan;
5127 cy_card[card_no].base_addr = NULL;
5128 free_irq(irq, &cy_card[card_no]);
5134 pci_release_regions(pdev);
5136 pci_disable_device(pdev);
5141 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5143 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5146 /* non-Z with old PLX */
5147 if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5149 cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
5151 #ifndef CONFIG_CYZ_INTR
5152 if (!cy_is_Z(cinfo))
5154 cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
5155 readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
5158 iounmap(cinfo->base_addr);
5159 if (cinfo->ctl_addr.p9050)
5160 iounmap(cinfo->ctl_addr.p9050);
5162 #ifndef CONFIG_CYZ_INTR
5164 #endif /* CONFIG_CYZ_INTR */
5166 free_irq(cinfo->irq, cinfo);
5167 pci_release_regions(pdev);
5169 cinfo->base_addr = NULL;
5170 for (i = cinfo->first_line; i < cinfo->first_line +
5172 tty_unregister_device(cy_serial_driver, i);
5174 kfree(cinfo->ports);
5177 static struct pci_driver cy_pci_driver = {
5179 .id_table = cy_pci_dev_id,
5180 .probe = cy_pci_probe,
5181 .remove = __devexit_p(cy_pci_remove)
5185 static int cyclades_proc_show(struct seq_file *m, void *v)
5187 struct cyclades_port *info;
5189 __u32 cur_jifs = jiffies;
5191 seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
5192 "IdleIn Overruns Ldisc\n");
5194 /* Output one line for each known port */
5195 for (i = 0; i < NR_CARDS; i++)
5196 for (j = 0; j < cy_card[i].nports; j++) {
5197 info = &cy_card[i].ports[j];
5199 if (info->port.count)
5200 seq_printf(m, "%3d %8lu %10lu %8lu "
5201 "%10lu %8lu %9lu %6ld\n", info->line,
5202 (cur_jifs - info->idle_stats.in_use) /
5203 HZ, info->idle_stats.xmit_bytes,
5204 (cur_jifs - info->idle_stats.xmit_idle)/
5205 HZ, info->idle_stats.recv_bytes,
5206 (cur_jifs - info->idle_stats.recv_idle)/
5207 HZ, info->idle_stats.overruns,
5208 /* FIXME: double check locking */
5209 (long)info->port.tty->ldisc.ops->num);
5211 seq_printf(m, "%3d %8lu %10lu %8lu "
5212 "%10lu %8lu %9lu %6ld\n",
5213 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5218 static int cyclades_proc_open(struct inode *inode, struct file *file)
5220 return single_open(file, cyclades_proc_show, NULL);
5223 static const struct file_operations cyclades_proc_fops = {
5224 .owner = THIS_MODULE,
5225 .open = cyclades_proc_open,
5227 .llseek = seq_lseek,
5228 .release = single_release,
5231 /* The serial driver boot-time initialization code!
5232 Hardware I/O ports are mapped to character special devices on a
5233 first found, first allocated manner. That is, this code searches
5234 for Cyclom cards in the system. As each is found, it is probed
5235 to discover how many chips (and thus how many ports) are present.
5236 These ports are mapped to the tty ports 32 and upward in monotonic
5237 fashion. If an 8-port card is replaced with a 16-port card, the
5238 port mapping on a following card will shift.
5240 This approach is different from what is used in the other serial
5241 device driver because the Cyclom is more properly a multiplexer,
5242 not just an aggregation of serial ports on one card.
5244 If there are more cards with more ports than have been
5245 statically allocated above, a warning is printed and the
5246 extra ports are ignored.
5249 static const struct tty_operations cy_ops = {
5253 .put_char = cy_put_char,
5254 .flush_chars = cy_flush_chars,
5255 .write_room = cy_write_room,
5256 .chars_in_buffer = cy_chars_in_buffer,
5257 .flush_buffer = cy_flush_buffer,
5259 .throttle = cy_throttle,
5260 .unthrottle = cy_unthrottle,
5261 .set_termios = cy_set_termios,
5264 .hangup = cy_hangup,
5265 .break_ctl = cy_break,
5266 .wait_until_sent = cy_wait_until_sent,
5267 .tiocmget = cy_tiocmget,
5268 .tiocmset = cy_tiocmset,
5269 .proc_fops = &cyclades_proc_fops,
5272 static int __init cy_init(void)
5274 unsigned int nboards;
5275 int retval = -ENOMEM;
5277 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5278 if (!cy_serial_driver)
5281 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5282 __DATE__, __TIME__);
5284 /* Initialize the tty_driver structure */
5286 cy_serial_driver->owner = THIS_MODULE;
5287 cy_serial_driver->driver_name = "cyclades";
5288 cy_serial_driver->name = "ttyC";
5289 cy_serial_driver->major = CYCLADES_MAJOR;
5290 cy_serial_driver->minor_start = 0;
5291 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5292 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5293 cy_serial_driver->init_termios = tty_std_termios;
5294 cy_serial_driver->init_termios.c_cflag =
5295 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5296 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5297 tty_set_operations(cy_serial_driver, &cy_ops);
5299 retval = tty_register_driver(cy_serial_driver);
5301 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5305 /* the code below is responsible to find the boards. Each different
5306 type of board has its own detection routine. If a board is found,
5307 the next cy_card structure available is set by the detection
5308 routine. These functions are responsible for checking the
5309 availability of cy_card and cy_port data structures and updating
5310 the cy_next_channel. */
5312 /* look for isa boards */
5313 nboards = cy_detect_isa();
5316 /* look for pci boards */
5317 retval = pci_register_driver(&cy_pci_driver);
5318 if (retval && !nboards) {
5319 tty_unregister_driver(cy_serial_driver);
5326 put_tty_driver(cy_serial_driver);
5331 static void __exit cy_cleanup_module(void)
5333 struct cyclades_card *card;
5336 #ifndef CONFIG_CYZ_INTR
5337 del_timer_sync(&cyz_timerlist);
5338 #endif /* CONFIG_CYZ_INTR */
5340 e1 = tty_unregister_driver(cy_serial_driver);
5342 printk(KERN_ERR "failed to unregister Cyclades serial "
5343 "driver(%d)\n", e1);
5346 pci_unregister_driver(&cy_pci_driver);
5349 for (i = 0; i < NR_CARDS; i++) {
5351 if (card->base_addr) {
5352 /* clear interrupt */
5353 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5354 iounmap(card->base_addr);
5355 if (card->ctl_addr.p9050)
5356 iounmap(card->ctl_addr.p9050);
5358 #ifndef CONFIG_CYZ_INTR
5360 #endif /* CONFIG_CYZ_INTR */
5362 free_irq(card->irq, card);
5363 for (e1 = card->first_line; e1 < card->first_line +
5365 tty_unregister_device(cy_serial_driver, e1);
5370 put_tty_driver(cy_serial_driver);
5371 } /* cy_cleanup_module */
5373 module_init(cy_init);
5374 module_exit(cy_cleanup_module);
5376 MODULE_LICENSE("GPL");
5377 MODULE_VERSION(CY_VERSION);
5378 MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);