diff options
author | Jarod Wilson <jarod@redhat.com> | 2010-07-26 19:34:04 -0400 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-08-02 15:43:33 -0400 |
commit | 69b1214c2c9189cd0fae7a79ee266d50261be9c8 (patch) | |
tree | f70fdd2ec2c1cb774128c42b7bbf1578a94d1afe /drivers/staging | |
parent | 44abf0d9b4de23b94072b389d6e3748832e2ef34 (diff) |
V4L/DVB: staging/lirc: add lirc_zilog driver
Commonly found on several Hauppauge video capture devices.
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/staging')
-rw-r--r-- | drivers/staging/lirc/lirc_zilog.c | 1387 |
1 files changed, 1387 insertions, 0 deletions
diff --git a/drivers/staging/lirc/lirc_zilog.c b/drivers/staging/lirc/lirc_zilog.c new file mode 100644 index 00000000000..1b013bf3389 --- /dev/null +++ b/drivers/staging/lirc/lirc_zilog.c | |||
@@ -0,0 +1,1387 @@ | |||
1 | /* | ||
2 | * i2c IR lirc driver for devices with zilog IR processors | ||
3 | * | ||
4 | * Copyright (c) 2000 Gerd Knorr <kraxel@goldbach.in-berlin.de> | ||
5 | * modified for PixelView (BT878P+W/FM) by | ||
6 | * Michal Kochanowicz <mkochano@pld.org.pl> | ||
7 | * Christoph Bartelmus <lirc@bartelmus.de> | ||
8 | * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by | ||
9 | * Ulrich Mueller <ulrich.mueller42@web.de> | ||
10 | * modified for Asus TV-Box and Creative/VisionTek BreakOut-Box by | ||
11 | * Stefan Jahn <stefan@lkcc.org> | ||
12 | * modified for inclusion into kernel sources by | ||
13 | * Jerome Brock <jbrock@users.sourceforge.net> | ||
14 | * modified for Leadtek Winfast PVR2000 by | ||
15 | * Thomas Reitmayr (treitmayr@yahoo.com) | ||
16 | * modified for Hauppauge PVR-150 IR TX device by | ||
17 | * Mark Weaver <mark@npsl.co.uk> | ||
18 | * changed name from lirc_pvr150 to lirc_zilog, works on more than pvr-150 | ||
19 | * Jarod Wilson <jarod@redhat.com> | ||
20 | * | ||
21 | * parts are cut&pasted from the lirc_i2c.c driver | ||
22 | * | ||
23 | * This program is free software; you can redistribute it and/or modify | ||
24 | * it under the terms of the GNU General Public License as published by | ||
25 | * the Free Software Foundation; either version 2 of the License, or | ||
26 | * (at your option) any later version. | ||
27 | * | ||
28 | * This program is distributed in the hope that it will be useful, | ||
29 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
30 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
31 | * GNU General Public License for more details. | ||
32 | * | ||
33 | * You should have received a copy of the GNU General Public License | ||
34 | * along with this program; if not, write to the Free Software | ||
35 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
36 | * | ||
37 | */ | ||
38 | |||
39 | |||
40 | #include <linux/version.h> | ||
41 | #include <linux/module.h> | ||
42 | #include <linux/kmod.h> | ||
43 | #include <linux/kernel.h> | ||
44 | #include <linux/sched.h> | ||
45 | #include <linux/fs.h> | ||
46 | #include <linux/poll.h> | ||
47 | #include <linux/string.h> | ||
48 | #include <linux/timer.h> | ||
49 | #include <linux/delay.h> | ||
50 | #include <linux/completion.h> | ||
51 | #include <linux/errno.h> | ||
52 | #include <linux/slab.h> | ||
53 | #include <linux/i2c.h> | ||
54 | #include <linux/firmware.h> | ||
55 | #include <linux/vmalloc.h> | ||
56 | |||
57 | #include <linux/mutex.h> | ||
58 | #include <linux/kthread.h> | ||
59 | |||
60 | #include <media/lirc_dev.h> | ||
61 | #include <media/lirc.h> | ||
62 | |||
63 | struct IR { | ||
64 | struct lirc_driver l; | ||
65 | |||
66 | /* Device info */ | ||
67 | struct mutex ir_lock; | ||
68 | int open; | ||
69 | |||
70 | /* RX device */ | ||
71 | struct i2c_client c_rx; | ||
72 | int have_rx; | ||
73 | |||
74 | /* RX device buffer & lock */ | ||
75 | struct lirc_buffer buf; | ||
76 | struct mutex buf_lock; | ||
77 | |||
78 | /* RX polling thread data */ | ||
79 | struct completion *t_notify; | ||
80 | struct completion *t_notify2; | ||
81 | int shutdown; | ||
82 | struct task_struct *task; | ||
83 | |||
84 | /* RX read data */ | ||
85 | unsigned char b[3]; | ||
86 | |||
87 | /* TX device */ | ||
88 | struct i2c_client c_tx; | ||
89 | int need_boot; | ||
90 | int have_tx; | ||
91 | }; | ||
92 | |||
93 | /* Minor -> data mapping */ | ||
94 | static struct IR *ir_devices[MAX_IRCTL_DEVICES]; | ||
95 | |||
96 | /* Block size for IR transmitter */ | ||
97 | #define TX_BLOCK_SIZE 99 | ||
98 | |||
99 | /* Hauppauge IR transmitter data */ | ||
100 | struct tx_data_struct { | ||
101 | /* Boot block */ | ||
102 | unsigned char *boot_data; | ||
103 | |||
104 | /* Start of binary data block */ | ||
105 | unsigned char *datap; | ||
106 | |||
107 | /* End of binary data block */ | ||
108 | unsigned char *endp; | ||
109 | |||
110 | /* Number of installed codesets */ | ||
111 | unsigned int num_code_sets; | ||
112 | |||
113 | /* Pointers to codesets */ | ||
114 | unsigned char **code_sets; | ||
115 | |||
116 | /* Global fixed data template */ | ||
117 | int fixed[TX_BLOCK_SIZE]; | ||
118 | }; | ||
119 | |||
120 | static struct tx_data_struct *tx_data; | ||
121 | static struct mutex tx_data_lock; | ||
122 | |||
123 | #define zilog_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, \ | ||
124 | ## args) | ||
125 | #define zilog_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args) | ||
126 | |||
127 | #define ZILOG_HAUPPAUGE_IR_RX_NAME "Zilog/Hauppauge IR RX" | ||
128 | #define ZILOG_HAUPPAUGE_IR_TX_NAME "Zilog/Hauppauge IR TX" | ||
129 | |||
130 | /* module parameters */ | ||
131 | static int debug; /* debug output */ | ||
132 | static int disable_rx; /* disable RX device */ | ||
133 | static int disable_tx; /* disable TX device */ | ||
134 | static int minor = -1; /* minor number */ | ||
135 | |||
136 | #define dprintk(fmt, args...) \ | ||
137 | do { \ | ||
138 | if (debug) \ | ||
139 | printk(KERN_DEBUG KBUILD_MODNAME ": " fmt, \ | ||
140 | ## args); \ | ||
141 | } while (0) | ||
142 | |||
143 | static int add_to_buf(struct IR *ir) | ||
144 | { | ||
145 | __u16 code; | ||
146 | unsigned char codes[2]; | ||
147 | unsigned char keybuf[6]; | ||
148 | int got_data = 0; | ||
149 | int ret; | ||
150 | int failures = 0; | ||
151 | unsigned char sendbuf[1] = { 0 }; | ||
152 | |||
153 | if (lirc_buffer_full(&ir->buf)) { | ||
154 | dprintk("buffer overflow\n"); | ||
155 | return -EOVERFLOW; | ||
156 | } | ||
157 | |||
158 | /* | ||
159 | * service the device as long as it is returning | ||
160 | * data and we have space | ||
161 | */ | ||
162 | do { | ||
163 | /* | ||
164 | * Lock i2c bus for the duration. RX/TX chips interfere so | ||
165 | * this is worth it | ||
166 | */ | ||
167 | mutex_lock(&ir->ir_lock); | ||
168 | |||
169 | /* | ||
170 | * Send random "poll command" (?) Windows driver does this | ||
171 | * and it is a good point to detect chip failure. | ||
172 | */ | ||
173 | ret = i2c_master_send(&ir->c_rx, sendbuf, 1); | ||
174 | if (ret != 1) { | ||
175 | zilog_error("i2c_master_send failed with %d\n", ret); | ||
176 | if (failures >= 3) { | ||
177 | mutex_unlock(&ir->ir_lock); | ||
178 | zilog_error("unable to read from the IR chip " | ||
179 | "after 3 resets, giving up\n"); | ||
180 | return ret; | ||
181 | } | ||
182 | |||
183 | /* Looks like the chip crashed, reset it */ | ||
184 | zilog_error("polling the IR receiver chip failed, " | ||
185 | "trying reset\n"); | ||
186 | |||
187 | set_current_state(TASK_UNINTERRUPTIBLE); | ||
188 | schedule_timeout((100 * HZ + 999) / 1000); | ||
189 | ir->need_boot = 1; | ||
190 | |||
191 | ++failures; | ||
192 | mutex_unlock(&ir->ir_lock); | ||
193 | continue; | ||
194 | } | ||
195 | |||
196 | ret = i2c_master_recv(&ir->c_rx, keybuf, sizeof(keybuf)); | ||
197 | mutex_unlock(&ir->ir_lock); | ||
198 | if (ret != sizeof(keybuf)) { | ||
199 | zilog_error("i2c_master_recv failed with %d -- " | ||
200 | "keeping last read buffer\n", ret); | ||
201 | } else { | ||
202 | ir->b[0] = keybuf[3]; | ||
203 | ir->b[1] = keybuf[4]; | ||
204 | ir->b[2] = keybuf[5]; | ||
205 | dprintk("key (0x%02x/0x%02x)\n", ir->b[0], ir->b[1]); | ||
206 | } | ||
207 | |||
208 | /* key pressed ? */ | ||
209 | #ifdef I2C_HW_B_HDPVR | ||
210 | if (ir->c_rx.adapter->id == I2C_HW_B_HDPVR) { | ||
211 | if (got_data && (keybuf[0] == 0x80)) | ||
212 | return 0; | ||
213 | else if (got_data && (keybuf[0] == 0x00)) | ||
214 | return -ENODATA; | ||
215 | } else if ((ir->b[0] & 0x80) == 0) | ||
216 | #else | ||
217 | if ((ir->b[0] & 0x80) == 0) | ||
218 | #endif | ||
219 | return got_data ? 0 : -ENODATA; | ||
220 | |||
221 | /* look what we have */ | ||
222 | code = (((__u16)ir->b[0] & 0x7f) << 6) | (ir->b[1] >> 2); | ||
223 | |||
224 | codes[0] = (code >> 8) & 0xff; | ||
225 | codes[1] = code & 0xff; | ||
226 | |||
227 | /* return it */ | ||
228 | lirc_buffer_write(&ir->buf, codes); | ||
229 | ++got_data; | ||
230 | } while (!lirc_buffer_full(&ir->buf)); | ||
231 | |||
232 | return 0; | ||
233 | } | ||
234 | |||
235 | /* | ||
236 | * Main function of the polling thread -- from lirc_dev. | ||
237 | * We don't fit the LIRC model at all anymore. This is horrible, but | ||
238 | * basically we have a single RX/TX device with a nasty failure mode | ||
239 | * that needs to be accounted for across the pair. lirc lets us provide | ||
240 | * fops, but prevents us from using the internal polling, etc. if we do | ||
241 | * so. Hence the replication. Might be neater to extend the LIRC model | ||
242 | * to account for this but I'd think it's a very special case of seriously | ||
243 | * messed up hardware. | ||
244 | */ | ||
245 | static int lirc_thread(void *arg) | ||
246 | { | ||
247 | struct IR *ir = arg; | ||
248 | |||
249 | if (ir->t_notify != NULL) | ||
250 | complete(ir->t_notify); | ||
251 | |||
252 | dprintk("poll thread started\n"); | ||
253 | |||
254 | do { | ||
255 | if (ir->open) { | ||
256 | set_current_state(TASK_INTERRUPTIBLE); | ||
257 | |||
258 | /* | ||
259 | * This is ~113*2 + 24 + jitter (2*repeat gap + | ||
260 | * code length). We use this interval as the chip | ||
261 | * resets every time you poll it (bad!). This is | ||
262 | * therefore just sufficient to catch all of the | ||
263 | * button presses. It makes the remote much more | ||
264 | * responsive. You can see the difference by | ||
265 | * running irw and holding down a button. With | ||
266 | * 100ms, the old polling interval, you'll notice | ||
267 | * breaks in the repeat sequence corresponding to | ||
268 | * lost keypresses. | ||
269 | */ | ||
270 | schedule_timeout((260 * HZ) / 1000); | ||
271 | if (ir->shutdown) | ||
272 | break; | ||
273 | if (!add_to_buf(ir)) | ||
274 | wake_up_interruptible(&ir->buf.wait_poll); | ||
275 | } else { | ||
276 | /* if device not opened so we can sleep half a second */ | ||
277 | set_current_state(TASK_INTERRUPTIBLE); | ||
278 | schedule_timeout(HZ/2); | ||
279 | } | ||
280 | } while (!ir->shutdown); | ||
281 | |||
282 | if (ir->t_notify2 != NULL) | ||
283 | wait_for_completion(ir->t_notify2); | ||
284 | |||
285 | ir->task = NULL; | ||
286 | if (ir->t_notify != NULL) | ||
287 | complete(ir->t_notify); | ||
288 | |||
289 | dprintk("poll thread ended\n"); | ||
290 | return 0; | ||
291 | } | ||
292 | |||
293 | static int set_use_inc(void *data) | ||
294 | { | ||
295 | struct IR *ir = data; | ||
296 | |||
297 | if (ir->l.owner == NULL || try_module_get(ir->l.owner) == 0) | ||
298 | return -ENODEV; | ||
299 | |||
300 | /* lock bttv in memory while /dev/lirc is in use */ | ||
301 | /* | ||
302 | * this is completely broken code. lirc_unregister_driver() | ||
303 | * must be possible even when the device is open | ||
304 | */ | ||
305 | if (ir->c_rx.addr) | ||
306 | i2c_use_client(&ir->c_rx); | ||
307 | if (ir->c_tx.addr) | ||
308 | i2c_use_client(&ir->c_tx); | ||
309 | |||
310 | return 0; | ||
311 | } | ||
312 | |||
313 | static void set_use_dec(void *data) | ||
314 | { | ||
315 | struct IR *ir = data; | ||
316 | |||
317 | if (ir->c_rx.addr) | ||
318 | i2c_release_client(&ir->c_rx); | ||
319 | if (ir->c_tx.addr) | ||
320 | i2c_release_client(&ir->c_tx); | ||
321 | if (ir->l.owner != NULL) | ||
322 | module_put(ir->l.owner); | ||
323 | } | ||
324 | |||
325 | /* safe read of a uint32 (always network byte order) */ | ||
326 | static int read_uint32(unsigned char **data, | ||
327 | unsigned char *endp, unsigned int *val) | ||
328 | { | ||
329 | if (*data + 4 > endp) | ||
330 | return 0; | ||
331 | *val = ((*data)[0] << 24) | ((*data)[1] << 16) | | ||
332 | ((*data)[2] << 8) | (*data)[3]; | ||
333 | *data += 4; | ||
334 | return 1; | ||
335 | } | ||
336 | |||
337 | /* safe read of a uint8 */ | ||
338 | static int read_uint8(unsigned char **data, | ||
339 | unsigned char *endp, unsigned char *val) | ||
340 | { | ||
341 | if (*data + 1 > endp) | ||
342 | return 0; | ||
343 | *val = *((*data)++); | ||
344 | return 1; | ||
345 | } | ||
346 | |||
347 | /* safe skipping of N bytes */ | ||
348 | static int skip(unsigned char **data, | ||
349 | unsigned char *endp, unsigned int distance) | ||
350 | { | ||
351 | if (*data + distance > endp) | ||
352 | return 0; | ||
353 | *data += distance; | ||
354 | return 1; | ||
355 | } | ||
356 | |||
357 | /* decompress key data into the given buffer */ | ||
358 | static int get_key_data(unsigned char *buf, | ||
359 | unsigned int codeset, unsigned int key) | ||
360 | { | ||
361 | unsigned char *data, *endp, *diffs, *key_block; | ||
362 | unsigned char keys, ndiffs, id; | ||
363 | unsigned int base, lim, pos, i; | ||
364 | |||
365 | /* Binary search for the codeset */ | ||
366 | for (base = 0, lim = tx_data->num_code_sets; lim; lim >>= 1) { | ||
367 | pos = base + (lim >> 1); | ||
368 | data = tx_data->code_sets[pos]; | ||
369 | |||
370 | if (!read_uint32(&data, tx_data->endp, &i)) | ||
371 | goto corrupt; | ||
372 | |||
373 | if (i == codeset) | ||
374 | break; | ||
375 | else if (codeset > i) { | ||
376 | base = pos + 1; | ||
377 | --lim; | ||
378 | } | ||
379 | } | ||
380 | /* Not found? */ | ||
381 | if (!lim) | ||
382 | return -EPROTO; | ||
383 | |||
384 | /* Set end of data block */ | ||
385 | endp = pos < tx_data->num_code_sets - 1 ? | ||
386 | tx_data->code_sets[pos + 1] : tx_data->endp; | ||
387 | |||
388 | /* Read the block header */ | ||
389 | if (!read_uint8(&data, endp, &keys) || | ||
390 | !read_uint8(&data, endp, &ndiffs) || | ||
391 | ndiffs > TX_BLOCK_SIZE || keys == 0) | ||
392 | goto corrupt; | ||
393 | |||
394 | /* Save diffs & skip */ | ||
395 | diffs = data; | ||
396 | if (!skip(&data, endp, ndiffs)) | ||
397 | goto corrupt; | ||
398 | |||
399 | /* Read the id of the first key */ | ||
400 | if (!read_uint8(&data, endp, &id)) | ||
401 | goto corrupt; | ||
402 | |||
403 | /* Unpack the first key's data */ | ||
404 | for (i = 0; i < TX_BLOCK_SIZE; ++i) { | ||
405 | if (tx_data->fixed[i] == -1) { | ||
406 | if (!read_uint8(&data, endp, &buf[i])) | ||
407 | goto corrupt; | ||
408 | } else { | ||
409 | buf[i] = (unsigned char)tx_data->fixed[i]; | ||
410 | } | ||
411 | } | ||
412 | |||
413 | /* Early out key found/not found */ | ||
414 | if (key == id) | ||
415 | return 0; | ||
416 | if (keys == 1) | ||
417 | return -EPROTO; | ||
418 | |||
419 | /* Sanity check */ | ||
420 | key_block = data; | ||
421 | if (!skip(&data, endp, (keys - 1) * (ndiffs + 1))) | ||
422 | goto corrupt; | ||
423 | |||
424 | /* Binary search for the key */ | ||
425 | for (base = 0, lim = keys - 1; lim; lim >>= 1) { | ||
426 | /* Seek to block */ | ||
427 | unsigned char *key_data; | ||
428 | pos = base + (lim >> 1); | ||
429 | key_data = key_block + (ndiffs + 1) * pos; | ||
430 | |||
431 | if (*key_data == key) { | ||
432 | /* skip key id */ | ||
433 | ++key_data; | ||
434 | |||
435 | /* found, so unpack the diffs */ | ||
436 | for (i = 0; i < ndiffs; ++i) { | ||
437 | unsigned char val; | ||
438 | if (!read_uint8(&key_data, endp, &val) || | ||
439 | diffs[i] >= TX_BLOCK_SIZE) | ||
440 | goto corrupt; | ||
441 | buf[diffs[i]] = val; | ||
442 | } | ||
443 | |||
444 | return 0; | ||
445 | } else if (key > *key_data) { | ||
446 | base = pos + 1; | ||
447 | --lim; | ||
448 | } | ||
449 | } | ||
450 | /* Key not found */ | ||
451 | return -EPROTO; | ||
452 | |||
453 | corrupt: | ||
454 | zilog_error("firmware is corrupt\n"); | ||
455 | return -EFAULT; | ||
456 | } | ||
457 | |||
458 | /* send a block of data to the IR TX device */ | ||
459 | static int send_data_block(struct IR *ir, unsigned char *data_block) | ||
460 | { | ||
461 | int i, j, ret; | ||
462 | unsigned char buf[5]; | ||
463 | |||
464 | for (i = 0; i < TX_BLOCK_SIZE;) { | ||
465 | int tosend = TX_BLOCK_SIZE - i; | ||
466 | if (tosend > 4) | ||
467 | tosend = 4; | ||
468 | buf[0] = (unsigned char)(i + 1); | ||
469 | for (j = 0; j < tosend; ++j) | ||
470 | buf[1 + j] = data_block[i + j]; | ||
471 | dprintk("%02x %02x %02x %02x %02x", | ||
472 | buf[0], buf[1], buf[2], buf[3], buf[4]); | ||
473 | ret = i2c_master_send(&ir->c_tx, buf, tosend + 1); | ||
474 | if (ret != tosend + 1) { | ||
475 | zilog_error("i2c_master_send failed with %d\n", ret); | ||
476 | return ret < 0 ? ret : -EFAULT; | ||
477 | } | ||
478 | i += tosend; | ||
479 | } | ||
480 | return 0; | ||
481 | } | ||
482 | |||
483 | /* send boot data to the IR TX device */ | ||
484 | static int send_boot_data(struct IR *ir) | ||
485 | { | ||
486 | int ret; | ||
487 | unsigned char buf[4]; | ||
488 | |||
489 | /* send the boot block */ | ||
490 | ret = send_data_block(ir, tx_data->boot_data); | ||
491 | if (ret != 0) | ||
492 | return ret; | ||
493 | |||
494 | /* kick it off? */ | ||
495 | buf[0] = 0x00; | ||
496 | buf[1] = 0x20; | ||
497 | ret = i2c_master_send(&ir->c_tx, buf, 2); | ||
498 | if (ret != 2) { | ||
499 | zilog_error("i2c_master_send failed with %d\n", ret); | ||
500 | return ret < 0 ? ret : -EFAULT; | ||
501 | } | ||
502 | ret = i2c_master_send(&ir->c_tx, buf, 1); | ||
503 | if (ret != 1) { | ||
504 | zilog_error("i2c_master_send failed with %d\n", ret); | ||
505 | return ret < 0 ? ret : -EFAULT; | ||
506 | } | ||
507 | |||
508 | /* Here comes the firmware version... (hopefully) */ | ||
509 | ret = i2c_master_recv(&ir->c_tx, buf, 4); | ||
510 | if (ret != 4) { | ||
511 | zilog_error("i2c_master_recv failed with %d\n", ret); | ||
512 | return 0; | ||
513 | } | ||
514 | if (buf[0] != 0x80) { | ||
515 | zilog_error("unexpected IR TX response: %02x\n", buf[0]); | ||
516 | return 0; | ||
517 | } | ||
518 | zilog_notify("Zilog/Hauppauge IR blaster firmware version " | ||
519 | "%d.%d.%d loaded\n", buf[1], buf[2], buf[3]); | ||
520 | |||
521 | return 0; | ||
522 | } | ||
523 | |||
524 | /* unload "firmware", lock held */ | ||
525 | static void fw_unload_locked(void) | ||
526 | { | ||
527 | if (tx_data) { | ||
528 | if (tx_data->code_sets) | ||
529 | vfree(tx_data->code_sets); | ||
530 | |||
531 | if (tx_data->datap) | ||
532 | vfree(tx_data->datap); | ||
533 | |||
534 | vfree(tx_data); | ||
535 | tx_data = NULL; | ||
536 | dprintk("successfully unloaded IR blaster firmware\n"); | ||
537 | } | ||
538 | } | ||
539 | |||
540 | /* unload "firmware" for the IR TX device */ | ||
541 | static void fw_unload(void) | ||
542 | { | ||
543 | mutex_lock(&tx_data_lock); | ||
544 | fw_unload_locked(); | ||
545 | mutex_unlock(&tx_data_lock); | ||
546 | } | ||
547 | |||
548 | /* load "firmware" for the IR TX device */ | ||
549 | static int fw_load(struct IR *ir) | ||
550 | { | ||
551 | int ret; | ||
552 | unsigned int i; | ||
553 | unsigned char *data, version, num_global_fixed; | ||
554 | const struct firmware *fw_entry; | ||
555 | |||
556 | /* Already loaded? */ | ||
557 | mutex_lock(&tx_data_lock); | ||
558 | if (tx_data) { | ||
559 | ret = 0; | ||
560 | goto out; | ||
561 | } | ||
562 | |||
563 | /* Request codeset data file */ | ||
564 | ret = request_firmware(&fw_entry, "haup-ir-blaster.bin", &ir->c_tx.dev); | ||
565 | if (ret != 0) { | ||
566 | zilog_error("firmware haup-ir-blaster.bin not available " | ||
567 | "(%d)\n", ret); | ||
568 | ret = ret < 0 ? ret : -EFAULT; | ||
569 | goto out; | ||
570 | } | ||
571 | dprintk("firmware of size %zu loaded\n", fw_entry->size); | ||
572 | |||
573 | /* Parse the file */ | ||
574 | tx_data = vmalloc(sizeof(*tx_data)); | ||
575 | if (tx_data == NULL) { | ||
576 | zilog_error("out of memory\n"); | ||
577 | release_firmware(fw_entry); | ||
578 | ret = -ENOMEM; | ||
579 | goto out; | ||
580 | } | ||
581 | tx_data->code_sets = NULL; | ||
582 | |||
583 | /* Copy the data so hotplug doesn't get confused and timeout */ | ||
584 | tx_data->datap = vmalloc(fw_entry->size); | ||
585 | if (tx_data->datap == NULL) { | ||
586 | zilog_error("out of memory\n"); | ||
587 | release_firmware(fw_entry); | ||
588 | vfree(tx_data); | ||
589 | ret = -ENOMEM; | ||
590 | goto out; | ||
591 | } | ||
592 | memcpy(tx_data->datap, fw_entry->data, fw_entry->size); | ||
593 | tx_data->endp = tx_data->datap + fw_entry->size; | ||
594 | release_firmware(fw_entry); fw_entry = NULL; | ||
595 | |||
596 | /* Check version */ | ||
597 | data = tx_data->datap; | ||
598 | if (!read_uint8(&data, tx_data->endp, &version)) | ||
599 | goto corrupt; | ||
600 | if (version != 1) { | ||
601 | zilog_error("unsupported code set file version (%u, expected" | ||
602 | "1) -- please upgrade to a newer driver", | ||
603 | version); | ||
604 | fw_unload_locked(); | ||
605 | ret = -EFAULT; | ||
606 | goto out; | ||
607 | } | ||
608 | |||
609 | /* Save boot block for later */ | ||
610 | tx_data->boot_data = data; | ||
611 | if (!skip(&data, tx_data->endp, TX_BLOCK_SIZE)) | ||
612 | goto corrupt; | ||
613 | |||
614 | if (!read_uint32(&data, tx_data->endp, | ||
615 | &tx_data->num_code_sets)) | ||
616 | goto corrupt; | ||
617 | |||
618 | dprintk("%u IR blaster codesets loaded\n", tx_data->num_code_sets); | ||
619 | |||
620 | tx_data->code_sets = vmalloc( | ||
621 | tx_data->num_code_sets * sizeof(char *)); | ||
622 | if (tx_data->code_sets == NULL) { | ||
623 | fw_unload_locked(); | ||
624 | ret = -ENOMEM; | ||
625 | goto out; | ||
626 | } | ||
627 | |||
628 | for (i = 0; i < TX_BLOCK_SIZE; ++i) | ||
629 | tx_data->fixed[i] = -1; | ||
630 | |||
631 | /* Read global fixed data template */ | ||
632 | if (!read_uint8(&data, tx_data->endp, &num_global_fixed) || | ||
633 | num_global_fixed > TX_BLOCK_SIZE) | ||
634 | goto corrupt; | ||
635 | for (i = 0; i < num_global_fixed; ++i) { | ||
636 | unsigned char pos, val; | ||
637 | if (!read_uint8(&data, tx_data->endp, &pos) || | ||
638 | !read_uint8(&data, tx_data->endp, &val) || | ||
639 | pos >= TX_BLOCK_SIZE) | ||
640 | goto corrupt; | ||
641 | tx_data->fixed[pos] = (int)val; | ||
642 | } | ||
643 | |||
644 | /* Filch out the position of each code set */ | ||
645 | for (i = 0; i < tx_data->num_code_sets; ++i) { | ||
646 | unsigned int id; | ||
647 | unsigned char keys; | ||
648 | unsigned char ndiffs; | ||
649 | |||
650 | /* Save the codeset position */ | ||
651 | tx_data->code_sets[i] = data; | ||
652 | |||
653 | /* Read header */ | ||
654 | if (!read_uint32(&data, tx_data->endp, &id) || | ||
655 | !read_uint8(&data, tx_data->endp, &keys) || | ||
656 | !read_uint8(&data, tx_data->endp, &ndiffs) || | ||
657 | ndiffs > TX_BLOCK_SIZE || keys == 0) | ||
658 | goto corrupt; | ||
659 | |||
660 | /* skip diff positions */ | ||
661 | if (!skip(&data, tx_data->endp, ndiffs)) | ||
662 | goto corrupt; | ||
663 | |||
664 | /* | ||
665 | * After the diffs we have the first key id + data - | ||
666 | * global fixed | ||
667 | */ | ||
668 | if (!skip(&data, tx_data->endp, | ||
669 | 1 + TX_BLOCK_SIZE - num_global_fixed)) | ||
670 | goto corrupt; | ||
671 | |||
672 | /* Then we have keys-1 blocks of key id+diffs */ | ||
673 | if (!skip(&data, tx_data->endp, | ||
674 | (ndiffs + 1) * (keys - 1))) | ||
675 | goto corrupt; | ||
676 | } | ||
677 | ret = 0; | ||
678 | goto out; | ||
679 | |||
680 | corrupt: | ||
681 | zilog_error("firmware is corrupt\n"); | ||
682 | fw_unload_locked(); | ||
683 | ret = -EFAULT; | ||
684 | |||
685 | out: | ||
686 | mutex_unlock(&tx_data_lock); | ||
687 | return ret; | ||
688 | } | ||
689 | |||
690 | /* initialise the IR TX device */ | ||
691 | static int tx_init(struct IR *ir) | ||
692 | { | ||
693 | int ret; | ||
694 | |||
695 | /* Load 'firmware' */ | ||
696 | ret = fw_load(ir); | ||
697 | if (ret != 0) | ||
698 | return ret; | ||
699 | |||
700 | /* Send boot block */ | ||
701 | ret = send_boot_data(ir); | ||
702 | if (ret != 0) | ||
703 | return ret; | ||
704 | ir->need_boot = 0; | ||
705 | |||
706 | /* Looks good */ | ||
707 | return 0; | ||
708 | } | ||
709 | |||
710 | /* do nothing stub to make LIRC happy */ | ||
711 | static loff_t lseek(struct file *filep, loff_t offset, int orig) | ||
712 | { | ||
713 | return -ESPIPE; | ||
714 | } | ||
715 | |||
716 | /* copied from lirc_dev */ | ||
717 | static ssize_t read(struct file *filep, char *outbuf, size_t n, loff_t *ppos) | ||
718 | { | ||
719 | struct IR *ir = (struct IR *)filep->private_data; | ||
720 | unsigned char buf[ir->buf.chunk_size]; | ||
721 | int ret = 0, written = 0; | ||
722 | DECLARE_WAITQUEUE(wait, current); | ||
723 | |||
724 | dprintk("read called\n"); | ||
725 | if (ir->c_rx.addr == 0) | ||
726 | return -ENODEV; | ||
727 | |||
728 | if (mutex_lock_interruptible(&ir->buf_lock)) | ||
729 | return -ERESTARTSYS; | ||
730 | |||
731 | if (n % ir->buf.chunk_size) { | ||
732 | dprintk("read result = -EINVAL\n"); | ||
733 | mutex_unlock(&ir->buf_lock); | ||
734 | return -EINVAL; | ||
735 | } | ||
736 | |||
737 | /* | ||
738 | * we add ourselves to the task queue before buffer check | ||
739 | * to avoid losing scan code (in case when queue is awaken somewhere | ||
740 | * between while condition checking and scheduling) | ||
741 | */ | ||
742 | add_wait_queue(&ir->buf.wait_poll, &wait); | ||
743 | set_current_state(TASK_INTERRUPTIBLE); | ||
744 | |||
745 | /* | ||
746 | * while we didn't provide 'length' bytes, device is opened in blocking | ||
747 | * mode and 'copy_to_user' is happy, wait for data. | ||
748 | */ | ||
749 | while (written < n && ret == 0) { | ||
750 | if (lirc_buffer_empty(&ir->buf)) { | ||
751 | /* | ||
752 | * According to the read(2) man page, 'written' can be | ||
753 | * returned as less than 'n', instead of blocking | ||
754 | * again, returning -EWOULDBLOCK, or returning | ||
755 | * -ERESTARTSYS | ||
756 | */ | ||
757 | if (written) | ||
758 | break; | ||
759 | if (filep->f_flags & O_NONBLOCK) { | ||
760 | ret = -EWOULDBLOCK; | ||
761 | break; | ||
762 | } | ||
763 | if (signal_pending(current)) { | ||
764 | ret = -ERESTARTSYS; | ||
765 | break; | ||
766 | } | ||
767 | schedule(); | ||
768 | set_current_state(TASK_INTERRUPTIBLE); | ||
769 | } else { | ||
770 | lirc_buffer_read(&ir->buf, buf); | ||
771 | ret = copy_to_user((void *)outbuf+written, buf, | ||
772 | ir->buf.chunk_size); | ||
773 | written += ir->buf.chunk_size; | ||
774 | } | ||
775 | } | ||
776 | |||
777 | remove_wait_queue(&ir->buf.wait_poll, &wait); | ||
778 | set_current_state(TASK_RUNNING); | ||
779 | mutex_unlock(&ir->buf_lock); | ||
780 | |||
781 | dprintk("read result = %s (%d)\n", | ||
782 | ret ? "-EFAULT" : "OK", ret); | ||
783 | |||
784 | return ret ? ret : written; | ||
785 | } | ||
786 | |||
787 | /* send a keypress to the IR TX device */ | ||
788 | static int send_code(struct IR *ir, unsigned int code, unsigned int key) | ||
789 | { | ||
790 | unsigned char data_block[TX_BLOCK_SIZE]; | ||
791 | unsigned char buf[2]; | ||
792 | int i, ret; | ||
793 | |||
794 | /* Get data for the codeset/key */ | ||
795 | ret = get_key_data(data_block, code, key); | ||
796 | |||
797 | if (ret == -EPROTO) { | ||
798 | zilog_error("failed to get data for code %u, key %u -- check " | ||
799 | "lircd.conf entries\n", code, key); | ||
800 | return ret; | ||
801 | } else if (ret != 0) | ||
802 | return ret; | ||
803 | |||
804 | /* Send the data block */ | ||
805 | ret = send_data_block(ir, data_block); | ||
806 | if (ret != 0) | ||
807 | return ret; | ||
808 | |||
809 | /* Send data block length? */ | ||
810 | buf[0] = 0x00; | ||
811 | buf[1] = 0x40; | ||
812 | ret = i2c_master_send(&ir->c_tx, buf, 2); | ||
813 | if (ret != 2) { | ||
814 | zilog_error("i2c_master_send failed with %d\n", ret); | ||
815 | return ret < 0 ? ret : -EFAULT; | ||
816 | } | ||
817 | ret = i2c_master_send(&ir->c_tx, buf, 1); | ||
818 | if (ret != 1) { | ||
819 | zilog_error("i2c_master_send failed with %d\n", ret); | ||
820 | return ret < 0 ? ret : -EFAULT; | ||
821 | } | ||
822 | |||
823 | /* Send finished download? */ | ||
824 | ret = i2c_master_recv(&ir->c_tx, buf, 1); | ||
825 | if (ret != 1) { | ||
826 | zilog_error("i2c_master_recv failed with %d\n", ret); | ||
827 | return ret < 0 ? ret : -EFAULT; | ||
828 | } | ||
829 | if (buf[0] != 0xA0) { | ||
830 | zilog_error("unexpected IR TX response #1: %02x\n", | ||
831 | buf[0]); | ||
832 | return -EFAULT; | ||
833 | } | ||
834 | |||
835 | /* Send prepare command? */ | ||
836 | buf[0] = 0x00; | ||
837 | buf[1] = 0x80; | ||
838 | ret = i2c_master_send(&ir->c_tx, buf, 2); | ||
839 | if (ret != 2) { | ||
840 | zilog_error("i2c_master_send failed with %d\n", ret); | ||
841 | return ret < 0 ? ret : -EFAULT; | ||
842 | } | ||
843 | |||
844 | #ifdef I2C_HW_B_HDPVR | ||
845 | /* | ||
846 | * The sleep bits aren't necessary on the HD PVR, and in fact, the | ||
847 | * last i2c_master_recv always fails with a -5, so for now, we're | ||
848 | * going to skip this whole mess and say we're done on the HD PVR | ||
849 | */ | ||
850 | if (ir->c_rx.adapter->id == I2C_HW_B_HDPVR) | ||
851 | goto done; | ||
852 | #endif | ||
853 | |||
854 | /* | ||
855 | * This bit NAKs until the device is ready, so we retry it | ||
856 | * sleeping a bit each time. This seems to be what the windows | ||
857 | * driver does, approximately. | ||
858 | * Try for up to 1s. | ||
859 | */ | ||
860 | for (i = 0; i < 20; ++i) { | ||
861 | set_current_state(TASK_UNINTERRUPTIBLE); | ||
862 | schedule_timeout((50 * HZ + 999) / 1000); | ||
863 | ret = i2c_master_send(&ir->c_tx, buf, 1); | ||
864 | if (ret == 1) | ||
865 | break; | ||
866 | dprintk("NAK expected: i2c_master_send " | ||
867 | "failed with %d (try %d)\n", ret, i+1); | ||
868 | } | ||
869 | if (ret != 1) { | ||
870 | zilog_error("IR TX chip never got ready: last i2c_master_send " | ||
871 | "failed with %d\n", ret); | ||
872 | return ret < 0 ? ret : -EFAULT; | ||
873 | } | ||
874 | |||
875 | /* Seems to be an 'ok' response */ | ||
876 | i = i2c_master_recv(&ir->c_tx, buf, 1); | ||
877 | if (i != 1) { | ||
878 | zilog_error("i2c_master_recv failed with %d\n", ret); | ||
879 | return -EFAULT; | ||
880 | } | ||
881 | if (buf[0] != 0x80) { | ||
882 | zilog_error("unexpected IR TX response #2: %02x\n", buf[0]); | ||
883 | return -EFAULT; | ||
884 | } | ||
885 | |||
886 | done: | ||
887 | /* Oh good, it worked */ | ||
888 | dprintk("sent code %u, key %u\n", code, key); | ||
889 | return 0; | ||
890 | } | ||
891 | |||
892 | /* | ||
893 | * Write a code to the device. We take in a 32-bit number (an int) and then | ||
894 | * decode this to a codeset/key index. The key data is then decompressed and | ||
895 | * sent to the device. We have a spin lock as per i2c documentation to prevent | ||
896 | * multiple concurrent sends which would probably cause the device to explode. | ||
897 | */ | ||
898 | static ssize_t write(struct file *filep, const char *buf, size_t n, | ||
899 | loff_t *ppos) | ||
900 | { | ||
901 | struct IR *ir = (struct IR *)filep->private_data; | ||
902 | size_t i; | ||
903 | int failures = 0; | ||
904 | |||
905 | if (ir->c_tx.addr == 0) | ||
906 | return -ENODEV; | ||
907 | |||
908 | /* Validate user parameters */ | ||
909 | if (n % sizeof(int)) | ||
910 | return -EINVAL; | ||
911 | |||
912 | /* Lock i2c bus for the duration */ | ||
913 | mutex_lock(&ir->ir_lock); | ||
914 | |||
915 | /* Send each keypress */ | ||
916 | for (i = 0; i < n;) { | ||
917 | int ret = 0; | ||
918 | int command; | ||
919 | |||
920 | if (copy_from_user(&command, buf + i, sizeof(command))) { | ||
921 | mutex_unlock(&ir->ir_lock); | ||
922 | return -EFAULT; | ||
923 | } | ||
924 | |||
925 | /* Send boot data first if required */ | ||
926 | if (ir->need_boot == 1) { | ||
927 | ret = send_boot_data(ir); | ||
928 | if (ret == 0) | ||
929 | ir->need_boot = 0; | ||
930 | } | ||
931 | |||
932 | /* Send the code */ | ||
933 | if (ret == 0) { | ||
934 | ret = send_code(ir, (unsigned)command >> 16, | ||
935 | (unsigned)command & 0xFFFF); | ||
936 | if (ret == -EPROTO) { | ||
937 | mutex_unlock(&ir->ir_lock); | ||
938 | return ret; | ||
939 | } | ||
940 | } | ||
941 | |||
942 | /* | ||
943 | * Hmm, a failure. If we've had a few then give up, otherwise | ||
944 | * try a reset | ||
945 | */ | ||
946 | if (ret != 0) { | ||
947 | /* Looks like the chip crashed, reset it */ | ||
948 | zilog_error("sending to the IR transmitter chip " | ||
949 | "failed, trying reset\n"); | ||
950 | |||
951 | if (failures >= 3) { | ||
952 | zilog_error("unable to send to the IR chip " | ||
953 | "after 3 resets, giving up\n"); | ||
954 | mutex_unlock(&ir->ir_lock); | ||
955 | return ret; | ||
956 | } | ||
957 | set_current_state(TASK_UNINTERRUPTIBLE); | ||
958 | schedule_timeout((100 * HZ + 999) / 1000); | ||
959 | ir->need_boot = 1; | ||
960 | ++failures; | ||
961 | } else | ||
962 | i += sizeof(int); | ||
963 | } | ||
964 | |||
965 | /* Release i2c bus */ | ||
966 | mutex_unlock(&ir->ir_lock); | ||
967 | |||
968 | /* All looks good */ | ||
969 | return n; | ||
970 | } | ||
971 | |||
972 | /* copied from lirc_dev */ | ||
973 | static unsigned int poll(struct file *filep, poll_table *wait) | ||
974 | { | ||
975 | struct IR *ir = (struct IR *)filep->private_data; | ||
976 | unsigned int ret; | ||
977 | |||
978 | dprintk("poll called\n"); | ||
979 | if (ir->c_rx.addr == 0) | ||
980 | return -ENODEV; | ||
981 | |||
982 | mutex_lock(&ir->buf_lock); | ||
983 | |||
984 | poll_wait(filep, &ir->buf.wait_poll, wait); | ||
985 | |||
986 | dprintk("poll result = %s\n", | ||
987 | lirc_buffer_empty(&ir->buf) ? "0" : "POLLIN|POLLRDNORM"); | ||
988 | |||
989 | ret = lirc_buffer_empty(&ir->buf) ? 0 : (POLLIN|POLLRDNORM); | ||
990 | |||
991 | mutex_unlock(&ir->buf_lock); | ||
992 | return ret; | ||
993 | } | ||
994 | |||
995 | static long ioctl(struct file *filep, unsigned int cmd, unsigned long arg) | ||
996 | { | ||
997 | struct IR *ir = (struct IR *)filep->private_data; | ||
998 | int result; | ||
999 | unsigned long mode, features = 0; | ||
1000 | |||
1001 | if (ir->c_rx.addr != 0) | ||
1002 | features |= LIRC_CAN_REC_LIRCCODE; | ||
1003 | if (ir->c_tx.addr != 0) | ||
1004 | features |= LIRC_CAN_SEND_PULSE; | ||
1005 | |||
1006 | switch (cmd) { | ||
1007 | case LIRC_GET_LENGTH: | ||
1008 | result = put_user((unsigned long)13, | ||
1009 | (unsigned long *)arg); | ||
1010 | break; | ||
1011 | case LIRC_GET_FEATURES: | ||
1012 | result = put_user(features, (unsigned long *) arg); | ||
1013 | break; | ||
1014 | case LIRC_GET_REC_MODE: | ||
1015 | if (!(features&LIRC_CAN_REC_MASK)) | ||
1016 | return -ENOSYS; | ||
1017 | |||
1018 | result = put_user(LIRC_REC2MODE | ||
1019 | (features&LIRC_CAN_REC_MASK), | ||
1020 | (unsigned long *)arg); | ||
1021 | break; | ||
1022 | case LIRC_SET_REC_MODE: | ||
1023 | if (!(features&LIRC_CAN_REC_MASK)) | ||
1024 | return -ENOSYS; | ||
1025 | |||
1026 | result = get_user(mode, (unsigned long *)arg); | ||
1027 | if (!result && !(LIRC_MODE2REC(mode) & features)) | ||
1028 | result = -EINVAL; | ||
1029 | break; | ||
1030 | case LIRC_GET_SEND_MODE: | ||
1031 | if (!(features&LIRC_CAN_SEND_MASK)) | ||
1032 | return -ENOSYS; | ||
1033 | |||
1034 | result = put_user(LIRC_MODE_PULSE, (unsigned long *) arg); | ||
1035 | break; | ||
1036 | case LIRC_SET_SEND_MODE: | ||
1037 | if (!(features&LIRC_CAN_SEND_MASK)) | ||
1038 | return -ENOSYS; | ||
1039 | |||
1040 | result = get_user(mode, (unsigned long *) arg); | ||
1041 | if (!result && mode != LIRC_MODE_PULSE) | ||
1042 | return -EINVAL; | ||
1043 | break; | ||
1044 | default: | ||
1045 | return -EINVAL; | ||
1046 | } | ||
1047 | return result; | ||
1048 | } | ||
1049 | |||
1050 | /* | ||
1051 | * Open the IR device. Get hold of our IR structure and | ||
1052 | * stash it in private_data for the file | ||
1053 | */ | ||
1054 | static int open(struct inode *node, struct file *filep) | ||
1055 | { | ||
1056 | struct IR *ir; | ||
1057 | int ret; | ||
1058 | |||
1059 | /* find our IR struct */ | ||
1060 | unsigned minor = MINOR(node->i_rdev); | ||
1061 | if (minor >= MAX_IRCTL_DEVICES) { | ||
1062 | dprintk("minor %d: open result = -ENODEV\n", | ||
1063 | minor); | ||
1064 | return -ENODEV; | ||
1065 | } | ||
1066 | ir = ir_devices[minor]; | ||
1067 | |||
1068 | /* increment in use count */ | ||
1069 | mutex_lock(&ir->ir_lock); | ||
1070 | ++ir->open; | ||
1071 | ret = set_use_inc(ir); | ||
1072 | if (ret != 0) { | ||
1073 | --ir->open; | ||
1074 | mutex_unlock(&ir->ir_lock); | ||
1075 | return ret; | ||
1076 | } | ||
1077 | mutex_unlock(&ir->ir_lock); | ||
1078 | |||
1079 | /* stash our IR struct */ | ||
1080 | filep->private_data = ir; | ||
1081 | |||
1082 | return 0; | ||
1083 | } | ||
1084 | |||
1085 | /* Close the IR device */ | ||
1086 | static int close(struct inode *node, struct file *filep) | ||
1087 | { | ||
1088 | /* find our IR struct */ | ||
1089 | struct IR *ir = (struct IR *)filep->private_data; | ||
1090 | if (ir == NULL) { | ||
1091 | zilog_error("close: no private_data attached to the file!\n"); | ||
1092 | return -ENODEV; | ||
1093 | } | ||
1094 | |||
1095 | /* decrement in use count */ | ||
1096 | mutex_lock(&ir->ir_lock); | ||
1097 | --ir->open; | ||
1098 | set_use_dec(ir); | ||
1099 | mutex_unlock(&ir->ir_lock); | ||
1100 | |||
1101 | return 0; | ||
1102 | } | ||
1103 | |||
1104 | static struct lirc_driver lirc_template = { | ||
1105 | .name = "lirc_zilog", | ||
1106 | .set_use_inc = set_use_inc, | ||
1107 | .set_use_dec = set_use_dec, | ||
1108 | .owner = THIS_MODULE | ||
1109 | }; | ||
1110 | |||
1111 | static int ir_remove(struct i2c_client *client); | ||
1112 | static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id); | ||
1113 | static int ir_command(struct i2c_client *client, unsigned int cmd, void *arg); | ||
1114 | |||
1115 | static const struct i2c_device_id ir_transceiver_id[] = { | ||
1116 | /* Generic entry for any IR transceiver */ | ||
1117 | { "ir_video", 0 }, | ||
1118 | /* IR device specific entries should be added here */ | ||
1119 | { "ir_tx_z8f0811_haup", 0 }, | ||
1120 | { "ir_rx_z8f0811_haup", 0 }, | ||
1121 | { } | ||
1122 | }; | ||
1123 | |||
1124 | static struct i2c_driver driver = { | ||
1125 | .driver = { | ||
1126 | .owner = THIS_MODULE, | ||
1127 | .name = "Zilog/Hauppauge i2c IR", | ||
1128 | }, | ||
1129 | .probe = ir_probe, | ||
1130 | .remove = ir_remove, | ||
1131 | .command = ir_command, | ||
1132 | .id_table = ir_transceiver_id, | ||
1133 | }; | ||
1134 | |||
1135 | static struct file_operations lirc_fops = { | ||
1136 | .owner = THIS_MODULE, | ||
1137 | .llseek = lseek, | ||
1138 | .read = read, | ||
1139 | .write = write, | ||
1140 | .poll = poll, | ||
1141 | .unlocked_ioctl = ioctl, | ||
1142 | .open = open, | ||
1143 | .release = close | ||
1144 | }; | ||
1145 | |||
1146 | static int ir_remove(struct i2c_client *client) | ||
1147 | { | ||
1148 | struct IR *ir = i2c_get_clientdata(client); | ||
1149 | |||
1150 | mutex_lock(&ir->ir_lock); | ||
1151 | |||
1152 | if (ir->have_rx || ir->have_tx) { | ||
1153 | DECLARE_COMPLETION(tn); | ||
1154 | DECLARE_COMPLETION(tn2); | ||
1155 | |||
1156 | /* end up polling thread */ | ||
1157 | if (ir->task && !IS_ERR(ir->task)) { | ||
1158 | ir->t_notify = &tn; | ||
1159 | ir->t_notify2 = &tn2; | ||
1160 | ir->shutdown = 1; | ||
1161 | wake_up_process(ir->task); | ||
1162 | complete(&tn2); | ||
1163 | wait_for_completion(&tn); | ||
1164 | ir->t_notify = NULL; | ||
1165 | ir->t_notify2 = NULL; | ||
1166 | } | ||
1167 | |||
1168 | } else { | ||
1169 | mutex_unlock(&ir->ir_lock); | ||
1170 | zilog_error("%s: detached from something we didn't " | ||
1171 | "attach to\n", __func__); | ||
1172 | return -ENODEV; | ||
1173 | } | ||
1174 | |||
1175 | /* unregister lirc driver */ | ||
1176 | if (ir->l.minor >= 0 && ir->l.minor < MAX_IRCTL_DEVICES) { | ||
1177 | lirc_unregister_driver(ir->l.minor); | ||
1178 | ir_devices[ir->l.minor] = NULL; | ||
1179 | } | ||
1180 | |||
1181 | /* free memory */ | ||
1182 | lirc_buffer_free(&ir->buf); | ||
1183 | mutex_unlock(&ir->ir_lock); | ||
1184 | kfree(ir); | ||
1185 | |||
1186 | return 0; | ||
1187 | } | ||
1188 | |||
1189 | static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id) | ||
1190 | { | ||
1191 | struct IR *ir = NULL; | ||
1192 | struct i2c_adapter *adap = client->adapter; | ||
1193 | char buf; | ||
1194 | int ret; | ||
1195 | int have_rx = 0, have_tx = 0; | ||
1196 | |||
1197 | dprintk("%s: adapter id=0x%x, client addr=0x%02x\n", | ||
1198 | __func__, adap->id, client->addr); | ||
1199 | |||
1200 | /* | ||
1201 | * The external IR receiver is at i2c address 0x71. | ||
1202 | * The IR transmitter is at 0x70. | ||
1203 | */ | ||
1204 | client->addr = 0x70; | ||
1205 | |||
1206 | if (!disable_tx) { | ||
1207 | if (i2c_master_recv(client, &buf, 1) == 1) | ||
1208 | have_tx = 1; | ||
1209 | dprintk("probe 0x70 @ %s: %s\n", | ||
1210 | adap->name, have_tx ? "success" : "failed"); | ||
1211 | } | ||
1212 | |||
1213 | if (!disable_rx) { | ||
1214 | client->addr = 0x71; | ||
1215 | if (i2c_master_recv(client, &buf, 1) == 1) | ||
1216 | have_rx = 1; | ||
1217 | dprintk("probe 0x71 @ %s: %s\n", | ||
1218 | adap->name, have_rx ? "success" : "failed"); | ||
1219 | } | ||
1220 | |||
1221 | if (!(have_rx || have_tx)) { | ||
1222 | zilog_error("%s: no devices found\n", adap->name); | ||
1223 | goto out_nodev; | ||
1224 | } | ||
1225 | |||
1226 | printk(KERN_INFO "lirc_zilog: chip found with %s\n", | ||
1227 | have_rx && have_tx ? "RX and TX" : | ||
1228 | have_rx ? "RX only" : "TX only"); | ||
1229 | |||
1230 | ir = kzalloc(sizeof(struct IR), GFP_KERNEL); | ||
1231 | |||
1232 | if (!ir) | ||
1233 | goto out_nomem; | ||
1234 | |||
1235 | ret = lirc_buffer_init(&ir->buf, 2, BUFLEN / 2); | ||
1236 | if (ret) | ||
1237 | goto out_nomem; | ||
1238 | |||
1239 | mutex_init(&ir->ir_lock); | ||
1240 | mutex_init(&ir->buf_lock); | ||
1241 | ir->need_boot = 1; | ||
1242 | |||
1243 | memcpy(&ir->l, &lirc_template, sizeof(struct lirc_driver)); | ||
1244 | ir->l.minor = -1; | ||
1245 | |||
1246 | /* I2C attach to device */ | ||
1247 | i2c_set_clientdata(client, ir); | ||
1248 | |||
1249 | /* initialise RX device */ | ||
1250 | if (have_rx) { | ||
1251 | DECLARE_COMPLETION(tn); | ||
1252 | memcpy(&ir->c_rx, client, sizeof(struct i2c_client)); | ||
1253 | |||
1254 | ir->c_rx.addr = 0x71; | ||
1255 | strlcpy(ir->c_rx.name, ZILOG_HAUPPAUGE_IR_RX_NAME, | ||
1256 | I2C_NAME_SIZE); | ||
1257 | |||
1258 | /* try to fire up polling thread */ | ||
1259 | ir->t_notify = &tn; | ||
1260 | ir->task = kthread_run(lirc_thread, ir, "lirc_zilog"); | ||
1261 | if (IS_ERR(ir->task)) { | ||
1262 | ret = PTR_ERR(ir->task); | ||
1263 | zilog_error("lirc_register_driver: cannot run " | ||
1264 | "poll thread %d\n", ret); | ||
1265 | goto err; | ||
1266 | } | ||
1267 | wait_for_completion(&tn); | ||
1268 | ir->t_notify = NULL; | ||
1269 | ir->have_rx = 1; | ||
1270 | } | ||
1271 | |||
1272 | /* initialise TX device */ | ||
1273 | if (have_tx) { | ||
1274 | memcpy(&ir->c_tx, client, sizeof(struct i2c_client)); | ||
1275 | ir->c_tx.addr = 0x70; | ||
1276 | strlcpy(ir->c_tx.name, ZILOG_HAUPPAUGE_IR_TX_NAME, | ||
1277 | I2C_NAME_SIZE); | ||
1278 | ir->have_tx = 1; | ||
1279 | } | ||
1280 | |||
1281 | /* set lirc_dev stuff */ | ||
1282 | ir->l.code_length = 13; | ||
1283 | ir->l.rbuf = &ir->buf; | ||
1284 | ir->l.fops = &lirc_fops; | ||
1285 | ir->l.data = ir; | ||
1286 | ir->l.minor = minor; | ||
1287 | ir->l.dev = &adap->dev; | ||
1288 | ir->l.sample_rate = 0; | ||
1289 | |||
1290 | /* register with lirc */ | ||
1291 | ir->l.minor = lirc_register_driver(&ir->l); | ||
1292 | if (ir->l.minor < 0 || ir->l.minor >= MAX_IRCTL_DEVICES) { | ||
1293 | zilog_error("ir_attach: \"minor\" must be between 0 and %d " | ||
1294 | "(%d)!\n", MAX_IRCTL_DEVICES-1, ir->l.minor); | ||
1295 | ret = -EBADRQC; | ||
1296 | goto err; | ||
1297 | } | ||
1298 | |||
1299 | /* store this for getting back in open() later on */ | ||
1300 | ir_devices[ir->l.minor] = ir; | ||
1301 | |||
1302 | /* | ||
1303 | * if we have the tx device, load the 'firmware'. We do this | ||
1304 | * after registering with lirc as otherwise hotplug seems to take | ||
1305 | * 10s to create the lirc device. | ||
1306 | */ | ||
1307 | if (have_tx) { | ||
1308 | /* Special TX init */ | ||
1309 | ret = tx_init(ir); | ||
1310 | if (ret != 0) | ||
1311 | goto err; | ||
1312 | } | ||
1313 | |||
1314 | return 0; | ||
1315 | |||
1316 | err: | ||
1317 | /* undo everything, hopefully... */ | ||
1318 | if (ir->c_rx.addr) | ||
1319 | ir_remove(&ir->c_rx); | ||
1320 | if (ir->c_tx.addr) | ||
1321 | ir_remove(&ir->c_tx); | ||
1322 | return ret; | ||
1323 | |||
1324 | out_nodev: | ||
1325 | zilog_error("no device found\n"); | ||
1326 | return -ENODEV; | ||
1327 | |||
1328 | out_nomem: | ||
1329 | zilog_error("memory allocation failure\n"); | ||
1330 | kfree(ir); | ||
1331 | return -ENOMEM; | ||
1332 | } | ||
1333 | |||
1334 | static int ir_command(struct i2c_client *client, unsigned int cmd, void *arg) | ||
1335 | { | ||
1336 | /* nothing */ | ||
1337 | return 0; | ||
1338 | } | ||
1339 | |||
1340 | static int __init zilog_init(void) | ||
1341 | { | ||
1342 | int ret; | ||
1343 | |||
1344 | zilog_notify("Zilog/Hauppauge IR driver initializing\n"); | ||
1345 | |||
1346 | mutex_init(&tx_data_lock); | ||
1347 | |||
1348 | request_module("firmware_class"); | ||
1349 | |||
1350 | ret = i2c_add_driver(&driver); | ||
1351 | if (ret) | ||
1352 | zilog_error("initialization failed\n"); | ||
1353 | else | ||
1354 | zilog_notify("initialization complete\n"); | ||
1355 | |||
1356 | return ret; | ||
1357 | } | ||
1358 | |||
1359 | static void __exit zilog_exit(void) | ||
1360 | { | ||
1361 | i2c_del_driver(&driver); | ||
1362 | /* if loaded */ | ||
1363 | fw_unload(); | ||
1364 | zilog_notify("Zilog/Hauppauge IR driver unloaded\n"); | ||
1365 | } | ||
1366 | |||
1367 | module_init(zilog_init); | ||
1368 | module_exit(zilog_exit); | ||
1369 | |||
1370 | MODULE_DESCRIPTION("Zilog/Hauppauge infrared transmitter driver (i2c stack)"); | ||
1371 | MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, " | ||
1372 | "Ulrich Mueller, Stefan Jahn, Jerome Brock, Mark Weaver"); | ||
1373 | MODULE_LICENSE("GPL"); | ||
1374 | /* for compat with old name, which isn't all that accurate anymore */ | ||
1375 | MODULE_ALIAS("lirc_pvr150"); | ||
1376 | |||
1377 | module_param(minor, int, 0444); | ||
1378 | MODULE_PARM_DESC(minor, "Preferred minor device number"); | ||
1379 | |||
1380 | module_param(debug, bool, 0644); | ||
1381 | MODULE_PARM_DESC(debug, "Enable debugging messages"); | ||
1382 | |||
1383 | module_param(disable_rx, bool, 0644); | ||
1384 | MODULE_PARM_DESC(disable_rx, "Disable the IR receiver device"); | ||
1385 | |||
1386 | module_param(disable_tx, bool, 0644); | ||
1387 | MODULE_PARM_DESC(disable_tx, "Disable the IR transmitter device"); | ||