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69b1214c JW |
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; | |
d7c72356 | 69 | bool is_hdpvr; |
69b1214c JW |
70 | |
71 | /* RX device */ | |
72 | struct i2c_client c_rx; | |
73 | int have_rx; | |
74 | ||
75 | /* RX device buffer & lock */ | |
76 | struct lirc_buffer buf; | |
77 | struct mutex buf_lock; | |
78 | ||
79 | /* RX polling thread data */ | |
80 | struct completion *t_notify; | |
81 | struct completion *t_notify2; | |
82 | int shutdown; | |
83 | struct task_struct *task; | |
84 | ||
85 | /* RX read data */ | |
86 | unsigned char b[3]; | |
87 | ||
88 | /* TX device */ | |
89 | struct i2c_client c_tx; | |
90 | int need_boot; | |
91 | int have_tx; | |
92 | }; | |
93 | ||
94 | /* Minor -> data mapping */ | |
95 | static struct IR *ir_devices[MAX_IRCTL_DEVICES]; | |
96 | ||
97 | /* Block size for IR transmitter */ | |
98 | #define TX_BLOCK_SIZE 99 | |
99 | ||
100 | /* Hauppauge IR transmitter data */ | |
101 | struct tx_data_struct { | |
102 | /* Boot block */ | |
103 | unsigned char *boot_data; | |
104 | ||
105 | /* Start of binary data block */ | |
106 | unsigned char *datap; | |
107 | ||
108 | /* End of binary data block */ | |
109 | unsigned char *endp; | |
110 | ||
111 | /* Number of installed codesets */ | |
112 | unsigned int num_code_sets; | |
113 | ||
114 | /* Pointers to codesets */ | |
115 | unsigned char **code_sets; | |
116 | ||
117 | /* Global fixed data template */ | |
118 | int fixed[TX_BLOCK_SIZE]; | |
119 | }; | |
120 | ||
121 | static struct tx_data_struct *tx_data; | |
122 | static struct mutex tx_data_lock; | |
123 | ||
124 | #define zilog_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, \ | |
125 | ## args) | |
126 | #define zilog_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args) | |
127 | ||
128 | #define ZILOG_HAUPPAUGE_IR_RX_NAME "Zilog/Hauppauge IR RX" | |
129 | #define ZILOG_HAUPPAUGE_IR_TX_NAME "Zilog/Hauppauge IR TX" | |
130 | ||
131 | /* module parameters */ | |
132 | static int debug; /* debug output */ | |
133 | static int disable_rx; /* disable RX device */ | |
134 | static int disable_tx; /* disable TX device */ | |
135 | static int minor = -1; /* minor number */ | |
136 | ||
137 | #define dprintk(fmt, args...) \ | |
138 | do { \ | |
139 | if (debug) \ | |
140 | printk(KERN_DEBUG KBUILD_MODNAME ": " fmt, \ | |
141 | ## args); \ | |
142 | } while (0) | |
143 | ||
144 | static int add_to_buf(struct IR *ir) | |
145 | { | |
146 | __u16 code; | |
147 | unsigned char codes[2]; | |
148 | unsigned char keybuf[6]; | |
149 | int got_data = 0; | |
150 | int ret; | |
151 | int failures = 0; | |
152 | unsigned char sendbuf[1] = { 0 }; | |
153 | ||
154 | if (lirc_buffer_full(&ir->buf)) { | |
155 | dprintk("buffer overflow\n"); | |
156 | return -EOVERFLOW; | |
157 | } | |
158 | ||
159 | /* | |
160 | * service the device as long as it is returning | |
161 | * data and we have space | |
162 | */ | |
163 | do { | |
164 | /* | |
165 | * Lock i2c bus for the duration. RX/TX chips interfere so | |
166 | * this is worth it | |
167 | */ | |
168 | mutex_lock(&ir->ir_lock); | |
169 | ||
170 | /* | |
171 | * Send random "poll command" (?) Windows driver does this | |
172 | * and it is a good point to detect chip failure. | |
173 | */ | |
174 | ret = i2c_master_send(&ir->c_rx, sendbuf, 1); | |
175 | if (ret != 1) { | |
176 | zilog_error("i2c_master_send failed with %d\n", ret); | |
177 | if (failures >= 3) { | |
178 | mutex_unlock(&ir->ir_lock); | |
179 | zilog_error("unable to read from the IR chip " | |
180 | "after 3 resets, giving up\n"); | |
181 | return ret; | |
182 | } | |
183 | ||
184 | /* Looks like the chip crashed, reset it */ | |
185 | zilog_error("polling the IR receiver chip failed, " | |
186 | "trying reset\n"); | |
187 | ||
188 | set_current_state(TASK_UNINTERRUPTIBLE); | |
189 | schedule_timeout((100 * HZ + 999) / 1000); | |
190 | ir->need_boot = 1; | |
191 | ||
192 | ++failures; | |
193 | mutex_unlock(&ir->ir_lock); | |
194 | continue; | |
195 | } | |
196 | ||
197 | ret = i2c_master_recv(&ir->c_rx, keybuf, sizeof(keybuf)); | |
198 | mutex_unlock(&ir->ir_lock); | |
199 | if (ret != sizeof(keybuf)) { | |
200 | zilog_error("i2c_master_recv failed with %d -- " | |
201 | "keeping last read buffer\n", ret); | |
202 | } else { | |
203 | ir->b[0] = keybuf[3]; | |
204 | ir->b[1] = keybuf[4]; | |
205 | ir->b[2] = keybuf[5]; | |
206 | dprintk("key (0x%02x/0x%02x)\n", ir->b[0], ir->b[1]); | |
207 | } | |
208 | ||
209 | /* key pressed ? */ | |
d7c72356 | 210 | if (ir->is_hdpvr) { |
69b1214c JW |
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) | |
69b1214c JW |
216 | return got_data ? 0 : -ENODATA; |
217 | ||
218 | /* look what we have */ | |
219 | code = (((__u16)ir->b[0] & 0x7f) << 6) | (ir->b[1] >> 2); | |
220 | ||
221 | codes[0] = (code >> 8) & 0xff; | |
222 | codes[1] = code & 0xff; | |
223 | ||
224 | /* return it */ | |
225 | lirc_buffer_write(&ir->buf, codes); | |
226 | ++got_data; | |
227 | } while (!lirc_buffer_full(&ir->buf)); | |
228 | ||
229 | return 0; | |
230 | } | |
231 | ||
232 | /* | |
233 | * Main function of the polling thread -- from lirc_dev. | |
234 | * We don't fit the LIRC model at all anymore. This is horrible, but | |
235 | * basically we have a single RX/TX device with a nasty failure mode | |
236 | * that needs to be accounted for across the pair. lirc lets us provide | |
237 | * fops, but prevents us from using the internal polling, etc. if we do | |
238 | * so. Hence the replication. Might be neater to extend the LIRC model | |
239 | * to account for this but I'd think it's a very special case of seriously | |
240 | * messed up hardware. | |
241 | */ | |
242 | static int lirc_thread(void *arg) | |
243 | { | |
244 | struct IR *ir = arg; | |
245 | ||
246 | if (ir->t_notify != NULL) | |
247 | complete(ir->t_notify); | |
248 | ||
249 | dprintk("poll thread started\n"); | |
250 | ||
251 | do { | |
252 | if (ir->open) { | |
253 | set_current_state(TASK_INTERRUPTIBLE); | |
254 | ||
255 | /* | |
256 | * This is ~113*2 + 24 + jitter (2*repeat gap + | |
257 | * code length). We use this interval as the chip | |
258 | * resets every time you poll it (bad!). This is | |
259 | * therefore just sufficient to catch all of the | |
260 | * button presses. It makes the remote much more | |
261 | * responsive. You can see the difference by | |
262 | * running irw and holding down a button. With | |
263 | * 100ms, the old polling interval, you'll notice | |
264 | * breaks in the repeat sequence corresponding to | |
265 | * lost keypresses. | |
266 | */ | |
267 | schedule_timeout((260 * HZ) / 1000); | |
268 | if (ir->shutdown) | |
269 | break; | |
270 | if (!add_to_buf(ir)) | |
271 | wake_up_interruptible(&ir->buf.wait_poll); | |
272 | } else { | |
273 | /* if device not opened so we can sleep half a second */ | |
274 | set_current_state(TASK_INTERRUPTIBLE); | |
275 | schedule_timeout(HZ/2); | |
276 | } | |
277 | } while (!ir->shutdown); | |
278 | ||
279 | if (ir->t_notify2 != NULL) | |
280 | wait_for_completion(ir->t_notify2); | |
281 | ||
282 | ir->task = NULL; | |
283 | if (ir->t_notify != NULL) | |
284 | complete(ir->t_notify); | |
285 | ||
286 | dprintk("poll thread ended\n"); | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static int set_use_inc(void *data) | |
291 | { | |
292 | struct IR *ir = data; | |
293 | ||
294 | if (ir->l.owner == NULL || try_module_get(ir->l.owner) == 0) | |
295 | return -ENODEV; | |
296 | ||
297 | /* lock bttv in memory while /dev/lirc is in use */ | |
298 | /* | |
299 | * this is completely broken code. lirc_unregister_driver() | |
300 | * must be possible even when the device is open | |
301 | */ | |
302 | if (ir->c_rx.addr) | |
303 | i2c_use_client(&ir->c_rx); | |
304 | if (ir->c_tx.addr) | |
305 | i2c_use_client(&ir->c_tx); | |
306 | ||
307 | return 0; | |
308 | } | |
309 | ||
310 | static void set_use_dec(void *data) | |
311 | { | |
312 | struct IR *ir = data; | |
313 | ||
314 | if (ir->c_rx.addr) | |
315 | i2c_release_client(&ir->c_rx); | |
316 | if (ir->c_tx.addr) | |
317 | i2c_release_client(&ir->c_tx); | |
318 | if (ir->l.owner != NULL) | |
319 | module_put(ir->l.owner); | |
320 | } | |
321 | ||
322 | /* safe read of a uint32 (always network byte order) */ | |
323 | static int read_uint32(unsigned char **data, | |
324 | unsigned char *endp, unsigned int *val) | |
325 | { | |
326 | if (*data + 4 > endp) | |
327 | return 0; | |
328 | *val = ((*data)[0] << 24) | ((*data)[1] << 16) | | |
329 | ((*data)[2] << 8) | (*data)[3]; | |
330 | *data += 4; | |
331 | return 1; | |
332 | } | |
333 | ||
334 | /* safe read of a uint8 */ | |
335 | static int read_uint8(unsigned char **data, | |
336 | unsigned char *endp, unsigned char *val) | |
337 | { | |
338 | if (*data + 1 > endp) | |
339 | return 0; | |
340 | *val = *((*data)++); | |
341 | return 1; | |
342 | } | |
343 | ||
344 | /* safe skipping of N bytes */ | |
345 | static int skip(unsigned char **data, | |
346 | unsigned char *endp, unsigned int distance) | |
347 | { | |
348 | if (*data + distance > endp) | |
349 | return 0; | |
350 | *data += distance; | |
351 | return 1; | |
352 | } | |
353 | ||
354 | /* decompress key data into the given buffer */ | |
355 | static int get_key_data(unsigned char *buf, | |
356 | unsigned int codeset, unsigned int key) | |
357 | { | |
358 | unsigned char *data, *endp, *diffs, *key_block; | |
359 | unsigned char keys, ndiffs, id; | |
360 | unsigned int base, lim, pos, i; | |
361 | ||
362 | /* Binary search for the codeset */ | |
363 | for (base = 0, lim = tx_data->num_code_sets; lim; lim >>= 1) { | |
364 | pos = base + (lim >> 1); | |
365 | data = tx_data->code_sets[pos]; | |
366 | ||
367 | if (!read_uint32(&data, tx_data->endp, &i)) | |
368 | goto corrupt; | |
369 | ||
370 | if (i == codeset) | |
371 | break; | |
372 | else if (codeset > i) { | |
373 | base = pos + 1; | |
374 | --lim; | |
375 | } | |
376 | } | |
377 | /* Not found? */ | |
378 | if (!lim) | |
379 | return -EPROTO; | |
380 | ||
381 | /* Set end of data block */ | |
382 | endp = pos < tx_data->num_code_sets - 1 ? | |
383 | tx_data->code_sets[pos + 1] : tx_data->endp; | |
384 | ||
385 | /* Read the block header */ | |
386 | if (!read_uint8(&data, endp, &keys) || | |
387 | !read_uint8(&data, endp, &ndiffs) || | |
388 | ndiffs > TX_BLOCK_SIZE || keys == 0) | |
389 | goto corrupt; | |
390 | ||
391 | /* Save diffs & skip */ | |
392 | diffs = data; | |
393 | if (!skip(&data, endp, ndiffs)) | |
394 | goto corrupt; | |
395 | ||
396 | /* Read the id of the first key */ | |
397 | if (!read_uint8(&data, endp, &id)) | |
398 | goto corrupt; | |
399 | ||
400 | /* Unpack the first key's data */ | |
401 | for (i = 0; i < TX_BLOCK_SIZE; ++i) { | |
402 | if (tx_data->fixed[i] == -1) { | |
403 | if (!read_uint8(&data, endp, &buf[i])) | |
404 | goto corrupt; | |
405 | } else { | |
406 | buf[i] = (unsigned char)tx_data->fixed[i]; | |
407 | } | |
408 | } | |
409 | ||
410 | /* Early out key found/not found */ | |
411 | if (key == id) | |
412 | return 0; | |
413 | if (keys == 1) | |
414 | return -EPROTO; | |
415 | ||
416 | /* Sanity check */ | |
417 | key_block = data; | |
418 | if (!skip(&data, endp, (keys - 1) * (ndiffs + 1))) | |
419 | goto corrupt; | |
420 | ||
421 | /* Binary search for the key */ | |
422 | for (base = 0, lim = keys - 1; lim; lim >>= 1) { | |
423 | /* Seek to block */ | |
424 | unsigned char *key_data; | |
425 | pos = base + (lim >> 1); | |
426 | key_data = key_block + (ndiffs + 1) * pos; | |
427 | ||
428 | if (*key_data == key) { | |
429 | /* skip key id */ | |
430 | ++key_data; | |
431 | ||
432 | /* found, so unpack the diffs */ | |
433 | for (i = 0; i < ndiffs; ++i) { | |
434 | unsigned char val; | |
435 | if (!read_uint8(&key_data, endp, &val) || | |
436 | diffs[i] >= TX_BLOCK_SIZE) | |
437 | goto corrupt; | |
438 | buf[diffs[i]] = val; | |
439 | } | |
440 | ||
441 | return 0; | |
442 | } else if (key > *key_data) { | |
443 | base = pos + 1; | |
444 | --lim; | |
445 | } | |
446 | } | |
447 | /* Key not found */ | |
448 | return -EPROTO; | |
449 | ||
450 | corrupt: | |
451 | zilog_error("firmware is corrupt\n"); | |
452 | return -EFAULT; | |
453 | } | |
454 | ||
455 | /* send a block of data to the IR TX device */ | |
456 | static int send_data_block(struct IR *ir, unsigned char *data_block) | |
457 | { | |
458 | int i, j, ret; | |
459 | unsigned char buf[5]; | |
460 | ||
461 | for (i = 0; i < TX_BLOCK_SIZE;) { | |
462 | int tosend = TX_BLOCK_SIZE - i; | |
463 | if (tosend > 4) | |
464 | tosend = 4; | |
465 | buf[0] = (unsigned char)(i + 1); | |
466 | for (j = 0; j < tosend; ++j) | |
467 | buf[1 + j] = data_block[i + j]; | |
468 | dprintk("%02x %02x %02x %02x %02x", | |
469 | buf[0], buf[1], buf[2], buf[3], buf[4]); | |
470 | ret = i2c_master_send(&ir->c_tx, buf, tosend + 1); | |
471 | if (ret != tosend + 1) { | |
472 | zilog_error("i2c_master_send failed with %d\n", ret); | |
473 | return ret < 0 ? ret : -EFAULT; | |
474 | } | |
475 | i += tosend; | |
476 | } | |
477 | return 0; | |
478 | } | |
479 | ||
480 | /* send boot data to the IR TX device */ | |
481 | static int send_boot_data(struct IR *ir) | |
482 | { | |
483 | int ret; | |
484 | unsigned char buf[4]; | |
485 | ||
486 | /* send the boot block */ | |
487 | ret = send_data_block(ir, tx_data->boot_data); | |
488 | if (ret != 0) | |
489 | return ret; | |
490 | ||
491 | /* kick it off? */ | |
492 | buf[0] = 0x00; | |
493 | buf[1] = 0x20; | |
494 | ret = i2c_master_send(&ir->c_tx, buf, 2); | |
495 | if (ret != 2) { | |
496 | zilog_error("i2c_master_send failed with %d\n", ret); | |
497 | return ret < 0 ? ret : -EFAULT; | |
498 | } | |
499 | ret = i2c_master_send(&ir->c_tx, buf, 1); | |
500 | if (ret != 1) { | |
501 | zilog_error("i2c_master_send failed with %d\n", ret); | |
502 | return ret < 0 ? ret : -EFAULT; | |
503 | } | |
504 | ||
505 | /* Here comes the firmware version... (hopefully) */ | |
506 | ret = i2c_master_recv(&ir->c_tx, buf, 4); | |
507 | if (ret != 4) { | |
508 | zilog_error("i2c_master_recv failed with %d\n", ret); | |
509 | return 0; | |
510 | } | |
511 | if (buf[0] != 0x80) { | |
512 | zilog_error("unexpected IR TX response: %02x\n", buf[0]); | |
513 | return 0; | |
514 | } | |
515 | zilog_notify("Zilog/Hauppauge IR blaster firmware version " | |
516 | "%d.%d.%d loaded\n", buf[1], buf[2], buf[3]); | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | /* unload "firmware", lock held */ | |
522 | static void fw_unload_locked(void) | |
523 | { | |
524 | if (tx_data) { | |
525 | if (tx_data->code_sets) | |
526 | vfree(tx_data->code_sets); | |
527 | ||
528 | if (tx_data->datap) | |
529 | vfree(tx_data->datap); | |
530 | ||
531 | vfree(tx_data); | |
532 | tx_data = NULL; | |
533 | dprintk("successfully unloaded IR blaster firmware\n"); | |
534 | } | |
535 | } | |
536 | ||
537 | /* unload "firmware" for the IR TX device */ | |
538 | static void fw_unload(void) | |
539 | { | |
540 | mutex_lock(&tx_data_lock); | |
541 | fw_unload_locked(); | |
542 | mutex_unlock(&tx_data_lock); | |
543 | } | |
544 | ||
545 | /* load "firmware" for the IR TX device */ | |
546 | static int fw_load(struct IR *ir) | |
547 | { | |
548 | int ret; | |
549 | unsigned int i; | |
550 | unsigned char *data, version, num_global_fixed; | |
551 | const struct firmware *fw_entry; | |
552 | ||
553 | /* Already loaded? */ | |
554 | mutex_lock(&tx_data_lock); | |
555 | if (tx_data) { | |
556 | ret = 0; | |
557 | goto out; | |
558 | } | |
559 | ||
560 | /* Request codeset data file */ | |
561 | ret = request_firmware(&fw_entry, "haup-ir-blaster.bin", &ir->c_tx.dev); | |
562 | if (ret != 0) { | |
563 | zilog_error("firmware haup-ir-blaster.bin not available " | |
564 | "(%d)\n", ret); | |
565 | ret = ret < 0 ? ret : -EFAULT; | |
566 | goto out; | |
567 | } | |
568 | dprintk("firmware of size %zu loaded\n", fw_entry->size); | |
569 | ||
570 | /* Parse the file */ | |
571 | tx_data = vmalloc(sizeof(*tx_data)); | |
572 | if (tx_data == NULL) { | |
573 | zilog_error("out of memory\n"); | |
574 | release_firmware(fw_entry); | |
575 | ret = -ENOMEM; | |
576 | goto out; | |
577 | } | |
578 | tx_data->code_sets = NULL; | |
579 | ||
580 | /* Copy the data so hotplug doesn't get confused and timeout */ | |
581 | tx_data->datap = vmalloc(fw_entry->size); | |
582 | if (tx_data->datap == NULL) { | |
583 | zilog_error("out of memory\n"); | |
584 | release_firmware(fw_entry); | |
585 | vfree(tx_data); | |
586 | ret = -ENOMEM; | |
587 | goto out; | |
588 | } | |
589 | memcpy(tx_data->datap, fw_entry->data, fw_entry->size); | |
590 | tx_data->endp = tx_data->datap + fw_entry->size; | |
591 | release_firmware(fw_entry); fw_entry = NULL; | |
592 | ||
593 | /* Check version */ | |
594 | data = tx_data->datap; | |
595 | if (!read_uint8(&data, tx_data->endp, &version)) | |
596 | goto corrupt; | |
597 | if (version != 1) { | |
598 | zilog_error("unsupported code set file version (%u, expected" | |
599 | "1) -- please upgrade to a newer driver", | |
600 | version); | |
601 | fw_unload_locked(); | |
602 | ret = -EFAULT; | |
603 | goto out; | |
604 | } | |
605 | ||
606 | /* Save boot block for later */ | |
607 | tx_data->boot_data = data; | |
608 | if (!skip(&data, tx_data->endp, TX_BLOCK_SIZE)) | |
609 | goto corrupt; | |
610 | ||
611 | if (!read_uint32(&data, tx_data->endp, | |
612 | &tx_data->num_code_sets)) | |
613 | goto corrupt; | |
614 | ||
615 | dprintk("%u IR blaster codesets loaded\n", tx_data->num_code_sets); | |
616 | ||
617 | tx_data->code_sets = vmalloc( | |
618 | tx_data->num_code_sets * sizeof(char *)); | |
619 | if (tx_data->code_sets == NULL) { | |
620 | fw_unload_locked(); | |
621 | ret = -ENOMEM; | |
622 | goto out; | |
623 | } | |
624 | ||
625 | for (i = 0; i < TX_BLOCK_SIZE; ++i) | |
626 | tx_data->fixed[i] = -1; | |
627 | ||
628 | /* Read global fixed data template */ | |
629 | if (!read_uint8(&data, tx_data->endp, &num_global_fixed) || | |
630 | num_global_fixed > TX_BLOCK_SIZE) | |
631 | goto corrupt; | |
632 | for (i = 0; i < num_global_fixed; ++i) { | |
633 | unsigned char pos, val; | |
634 | if (!read_uint8(&data, tx_data->endp, &pos) || | |
635 | !read_uint8(&data, tx_data->endp, &val) || | |
636 | pos >= TX_BLOCK_SIZE) | |
637 | goto corrupt; | |
638 | tx_data->fixed[pos] = (int)val; | |
639 | } | |
640 | ||
641 | /* Filch out the position of each code set */ | |
642 | for (i = 0; i < tx_data->num_code_sets; ++i) { | |
643 | unsigned int id; | |
644 | unsigned char keys; | |
645 | unsigned char ndiffs; | |
646 | ||
647 | /* Save the codeset position */ | |
648 | tx_data->code_sets[i] = data; | |
649 | ||
650 | /* Read header */ | |
651 | if (!read_uint32(&data, tx_data->endp, &id) || | |
652 | !read_uint8(&data, tx_data->endp, &keys) || | |
653 | !read_uint8(&data, tx_data->endp, &ndiffs) || | |
654 | ndiffs > TX_BLOCK_SIZE || keys == 0) | |
655 | goto corrupt; | |
656 | ||
657 | /* skip diff positions */ | |
658 | if (!skip(&data, tx_data->endp, ndiffs)) | |
659 | goto corrupt; | |
660 | ||
661 | /* | |
662 | * After the diffs we have the first key id + data - | |
663 | * global fixed | |
664 | */ | |
665 | if (!skip(&data, tx_data->endp, | |
666 | 1 + TX_BLOCK_SIZE - num_global_fixed)) | |
667 | goto corrupt; | |
668 | ||
669 | /* Then we have keys-1 blocks of key id+diffs */ | |
670 | if (!skip(&data, tx_data->endp, | |
671 | (ndiffs + 1) * (keys - 1))) | |
672 | goto corrupt; | |
673 | } | |
674 | ret = 0; | |
675 | goto out; | |
676 | ||
677 | corrupt: | |
678 | zilog_error("firmware is corrupt\n"); | |
679 | fw_unload_locked(); | |
680 | ret = -EFAULT; | |
681 | ||
682 | out: | |
683 | mutex_unlock(&tx_data_lock); | |
684 | return ret; | |
685 | } | |
686 | ||
687 | /* initialise the IR TX device */ | |
688 | static int tx_init(struct IR *ir) | |
689 | { | |
690 | int ret; | |
691 | ||
692 | /* Load 'firmware' */ | |
693 | ret = fw_load(ir); | |
694 | if (ret != 0) | |
695 | return ret; | |
696 | ||
697 | /* Send boot block */ | |
698 | ret = send_boot_data(ir); | |
699 | if (ret != 0) | |
700 | return ret; | |
701 | ir->need_boot = 0; | |
702 | ||
703 | /* Looks good */ | |
704 | return 0; | |
705 | } | |
706 | ||
707 | /* do nothing stub to make LIRC happy */ | |
708 | static loff_t lseek(struct file *filep, loff_t offset, int orig) | |
709 | { | |
710 | return -ESPIPE; | |
711 | } | |
712 | ||
713 | /* copied from lirc_dev */ | |
714 | static ssize_t read(struct file *filep, char *outbuf, size_t n, loff_t *ppos) | |
715 | { | |
e0ac7da0 | 716 | struct IR *ir = filep->private_data; |
69b1214c JW |
717 | unsigned char buf[ir->buf.chunk_size]; |
718 | int ret = 0, written = 0; | |
719 | DECLARE_WAITQUEUE(wait, current); | |
720 | ||
721 | dprintk("read called\n"); | |
722 | if (ir->c_rx.addr == 0) | |
723 | return -ENODEV; | |
724 | ||
725 | if (mutex_lock_interruptible(&ir->buf_lock)) | |
726 | return -ERESTARTSYS; | |
727 | ||
728 | if (n % ir->buf.chunk_size) { | |
729 | dprintk("read result = -EINVAL\n"); | |
730 | mutex_unlock(&ir->buf_lock); | |
731 | return -EINVAL; | |
732 | } | |
733 | ||
734 | /* | |
735 | * we add ourselves to the task queue before buffer check | |
736 | * to avoid losing scan code (in case when queue is awaken somewhere | |
737 | * between while condition checking and scheduling) | |
738 | */ | |
739 | add_wait_queue(&ir->buf.wait_poll, &wait); | |
740 | set_current_state(TASK_INTERRUPTIBLE); | |
741 | ||
742 | /* | |
743 | * while we didn't provide 'length' bytes, device is opened in blocking | |
744 | * mode and 'copy_to_user' is happy, wait for data. | |
745 | */ | |
746 | while (written < n && ret == 0) { | |
747 | if (lirc_buffer_empty(&ir->buf)) { | |
748 | /* | |
749 | * According to the read(2) man page, 'written' can be | |
750 | * returned as less than 'n', instead of blocking | |
751 | * again, returning -EWOULDBLOCK, or returning | |
752 | * -ERESTARTSYS | |
753 | */ | |
754 | if (written) | |
755 | break; | |
756 | if (filep->f_flags & O_NONBLOCK) { | |
757 | ret = -EWOULDBLOCK; | |
758 | break; | |
759 | } | |
760 | if (signal_pending(current)) { | |
761 | ret = -ERESTARTSYS; | |
762 | break; | |
763 | } | |
764 | schedule(); | |
765 | set_current_state(TASK_INTERRUPTIBLE); | |
766 | } else { | |
767 | lirc_buffer_read(&ir->buf, buf); | |
768 | ret = copy_to_user((void *)outbuf+written, buf, | |
769 | ir->buf.chunk_size); | |
770 | written += ir->buf.chunk_size; | |
771 | } | |
772 | } | |
773 | ||
774 | remove_wait_queue(&ir->buf.wait_poll, &wait); | |
775 | set_current_state(TASK_RUNNING); | |
776 | mutex_unlock(&ir->buf_lock); | |
777 | ||
778 | dprintk("read result = %s (%d)\n", | |
779 | ret ? "-EFAULT" : "OK", ret); | |
780 | ||
781 | return ret ? ret : written; | |
782 | } | |
783 | ||
784 | /* send a keypress to the IR TX device */ | |
785 | static int send_code(struct IR *ir, unsigned int code, unsigned int key) | |
786 | { | |
787 | unsigned char data_block[TX_BLOCK_SIZE]; | |
788 | unsigned char buf[2]; | |
789 | int i, ret; | |
790 | ||
791 | /* Get data for the codeset/key */ | |
792 | ret = get_key_data(data_block, code, key); | |
793 | ||
794 | if (ret == -EPROTO) { | |
795 | zilog_error("failed to get data for code %u, key %u -- check " | |
796 | "lircd.conf entries\n", code, key); | |
797 | return ret; | |
798 | } else if (ret != 0) | |
799 | return ret; | |
800 | ||
801 | /* Send the data block */ | |
802 | ret = send_data_block(ir, data_block); | |
803 | if (ret != 0) | |
804 | return ret; | |
805 | ||
806 | /* Send data block length? */ | |
807 | buf[0] = 0x00; | |
808 | buf[1] = 0x40; | |
809 | ret = i2c_master_send(&ir->c_tx, buf, 2); | |
810 | if (ret != 2) { | |
811 | zilog_error("i2c_master_send failed with %d\n", ret); | |
812 | return ret < 0 ? ret : -EFAULT; | |
813 | } | |
814 | ret = i2c_master_send(&ir->c_tx, buf, 1); | |
815 | if (ret != 1) { | |
816 | zilog_error("i2c_master_send failed with %d\n", ret); | |
817 | return ret < 0 ? ret : -EFAULT; | |
818 | } | |
819 | ||
820 | /* Send finished download? */ | |
821 | ret = i2c_master_recv(&ir->c_tx, buf, 1); | |
822 | if (ret != 1) { | |
823 | zilog_error("i2c_master_recv failed with %d\n", ret); | |
824 | return ret < 0 ? ret : -EFAULT; | |
825 | } | |
826 | if (buf[0] != 0xA0) { | |
827 | zilog_error("unexpected IR TX response #1: %02x\n", | |
828 | buf[0]); | |
829 | return -EFAULT; | |
830 | } | |
831 | ||
832 | /* Send prepare command? */ | |
833 | buf[0] = 0x00; | |
834 | buf[1] = 0x80; | |
835 | ret = i2c_master_send(&ir->c_tx, buf, 2); | |
836 | if (ret != 2) { | |
837 | zilog_error("i2c_master_send failed with %d\n", ret); | |
838 | return ret < 0 ? ret : -EFAULT; | |
839 | } | |
840 | ||
69b1214c JW |
841 | /* |
842 | * The sleep bits aren't necessary on the HD PVR, and in fact, the | |
843 | * last i2c_master_recv always fails with a -5, so for now, we're | |
844 | * going to skip this whole mess and say we're done on the HD PVR | |
845 | */ | |
d7c72356 AW |
846 | if (ir->is_hdpvr) { |
847 | dprintk("sent code %u, key %u\n", code, key); | |
848 | return 0; | |
849 | } | |
69b1214c JW |
850 | |
851 | /* | |
852 | * This bit NAKs until the device is ready, so we retry it | |
853 | * sleeping a bit each time. This seems to be what the windows | |
854 | * driver does, approximately. | |
855 | * Try for up to 1s. | |
856 | */ | |
857 | for (i = 0; i < 20; ++i) { | |
858 | set_current_state(TASK_UNINTERRUPTIBLE); | |
859 | schedule_timeout((50 * HZ + 999) / 1000); | |
860 | ret = i2c_master_send(&ir->c_tx, buf, 1); | |
861 | if (ret == 1) | |
862 | break; | |
863 | dprintk("NAK expected: i2c_master_send " | |
864 | "failed with %d (try %d)\n", ret, i+1); | |
865 | } | |
866 | if (ret != 1) { | |
867 | zilog_error("IR TX chip never got ready: last i2c_master_send " | |
868 | "failed with %d\n", ret); | |
869 | return ret < 0 ? ret : -EFAULT; | |
870 | } | |
871 | ||
872 | /* Seems to be an 'ok' response */ | |
873 | i = i2c_master_recv(&ir->c_tx, buf, 1); | |
874 | if (i != 1) { | |
875 | zilog_error("i2c_master_recv failed with %d\n", ret); | |
876 | return -EFAULT; | |
877 | } | |
878 | if (buf[0] != 0x80) { | |
879 | zilog_error("unexpected IR TX response #2: %02x\n", buf[0]); | |
880 | return -EFAULT; | |
881 | } | |
882 | ||
69b1214c JW |
883 | /* Oh good, it worked */ |
884 | dprintk("sent code %u, key %u\n", code, key); | |
885 | return 0; | |
886 | } | |
887 | ||
888 | /* | |
889 | * Write a code to the device. We take in a 32-bit number (an int) and then | |
890 | * decode this to a codeset/key index. The key data is then decompressed and | |
891 | * sent to the device. We have a spin lock as per i2c documentation to prevent | |
892 | * multiple concurrent sends which would probably cause the device to explode. | |
893 | */ | |
894 | static ssize_t write(struct file *filep, const char *buf, size_t n, | |
895 | loff_t *ppos) | |
896 | { | |
e0ac7da0 | 897 | struct IR *ir = filep->private_data; |
69b1214c JW |
898 | size_t i; |
899 | int failures = 0; | |
900 | ||
901 | if (ir->c_tx.addr == 0) | |
902 | return -ENODEV; | |
903 | ||
904 | /* Validate user parameters */ | |
905 | if (n % sizeof(int)) | |
906 | return -EINVAL; | |
907 | ||
908 | /* Lock i2c bus for the duration */ | |
909 | mutex_lock(&ir->ir_lock); | |
910 | ||
911 | /* Send each keypress */ | |
912 | for (i = 0; i < n;) { | |
913 | int ret = 0; | |
914 | int command; | |
915 | ||
916 | if (copy_from_user(&command, buf + i, sizeof(command))) { | |
917 | mutex_unlock(&ir->ir_lock); | |
918 | return -EFAULT; | |
919 | } | |
920 | ||
921 | /* Send boot data first if required */ | |
922 | if (ir->need_boot == 1) { | |
923 | ret = send_boot_data(ir); | |
924 | if (ret == 0) | |
925 | ir->need_boot = 0; | |
926 | } | |
927 | ||
928 | /* Send the code */ | |
929 | if (ret == 0) { | |
930 | ret = send_code(ir, (unsigned)command >> 16, | |
931 | (unsigned)command & 0xFFFF); | |
932 | if (ret == -EPROTO) { | |
933 | mutex_unlock(&ir->ir_lock); | |
934 | return ret; | |
935 | } | |
936 | } | |
937 | ||
938 | /* | |
939 | * Hmm, a failure. If we've had a few then give up, otherwise | |
940 | * try a reset | |
941 | */ | |
942 | if (ret != 0) { | |
943 | /* Looks like the chip crashed, reset it */ | |
944 | zilog_error("sending to the IR transmitter chip " | |
945 | "failed, trying reset\n"); | |
946 | ||
947 | if (failures >= 3) { | |
948 | zilog_error("unable to send to the IR chip " | |
949 | "after 3 resets, giving up\n"); | |
950 | mutex_unlock(&ir->ir_lock); | |
951 | return ret; | |
952 | } | |
953 | set_current_state(TASK_UNINTERRUPTIBLE); | |
954 | schedule_timeout((100 * HZ + 999) / 1000); | |
955 | ir->need_boot = 1; | |
956 | ++failures; | |
957 | } else | |
958 | i += sizeof(int); | |
959 | } | |
960 | ||
961 | /* Release i2c bus */ | |
962 | mutex_unlock(&ir->ir_lock); | |
963 | ||
964 | /* All looks good */ | |
965 | return n; | |
966 | } | |
967 | ||
968 | /* copied from lirc_dev */ | |
969 | static unsigned int poll(struct file *filep, poll_table *wait) | |
970 | { | |
e0ac7da0 | 971 | struct IR *ir = filep->private_data; |
69b1214c JW |
972 | unsigned int ret; |
973 | ||
974 | dprintk("poll called\n"); | |
975 | if (ir->c_rx.addr == 0) | |
976 | return -ENODEV; | |
977 | ||
978 | mutex_lock(&ir->buf_lock); | |
979 | ||
980 | poll_wait(filep, &ir->buf.wait_poll, wait); | |
981 | ||
982 | dprintk("poll result = %s\n", | |
983 | lirc_buffer_empty(&ir->buf) ? "0" : "POLLIN|POLLRDNORM"); | |
984 | ||
985 | ret = lirc_buffer_empty(&ir->buf) ? 0 : (POLLIN|POLLRDNORM); | |
986 | ||
987 | mutex_unlock(&ir->buf_lock); | |
988 | return ret; | |
989 | } | |
990 | ||
991 | static long ioctl(struct file *filep, unsigned int cmd, unsigned long arg) | |
992 | { | |
e0ac7da0 | 993 | struct IR *ir = filep->private_data; |
69b1214c JW |
994 | int result; |
995 | unsigned long mode, features = 0; | |
996 | ||
997 | if (ir->c_rx.addr != 0) | |
998 | features |= LIRC_CAN_REC_LIRCCODE; | |
999 | if (ir->c_tx.addr != 0) | |
1000 | features |= LIRC_CAN_SEND_PULSE; | |
1001 | ||
1002 | switch (cmd) { | |
1003 | case LIRC_GET_LENGTH: | |
1004 | result = put_user((unsigned long)13, | |
1005 | (unsigned long *)arg); | |
1006 | break; | |
1007 | case LIRC_GET_FEATURES: | |
1008 | result = put_user(features, (unsigned long *) arg); | |
1009 | break; | |
1010 | case LIRC_GET_REC_MODE: | |
1011 | if (!(features&LIRC_CAN_REC_MASK)) | |
1012 | return -ENOSYS; | |
1013 | ||
1014 | result = put_user(LIRC_REC2MODE | |
1015 | (features&LIRC_CAN_REC_MASK), | |
1016 | (unsigned long *)arg); | |
1017 | break; | |
1018 | case LIRC_SET_REC_MODE: | |
1019 | if (!(features&LIRC_CAN_REC_MASK)) | |
1020 | return -ENOSYS; | |
1021 | ||
1022 | result = get_user(mode, (unsigned long *)arg); | |
1023 | if (!result && !(LIRC_MODE2REC(mode) & features)) | |
1024 | result = -EINVAL; | |
1025 | break; | |
1026 | case LIRC_GET_SEND_MODE: | |
1027 | if (!(features&LIRC_CAN_SEND_MASK)) | |
1028 | return -ENOSYS; | |
1029 | ||
1030 | result = put_user(LIRC_MODE_PULSE, (unsigned long *) arg); | |
1031 | break; | |
1032 | case LIRC_SET_SEND_MODE: | |
1033 | if (!(features&LIRC_CAN_SEND_MASK)) | |
1034 | return -ENOSYS; | |
1035 | ||
1036 | result = get_user(mode, (unsigned long *) arg); | |
1037 | if (!result && mode != LIRC_MODE_PULSE) | |
1038 | return -EINVAL; | |
1039 | break; | |
1040 | default: | |
1041 | return -EINVAL; | |
1042 | } | |
1043 | return result; | |
1044 | } | |
1045 | ||
1046 | /* | |
1047 | * Open the IR device. Get hold of our IR structure and | |
1048 | * stash it in private_data for the file | |
1049 | */ | |
1050 | static int open(struct inode *node, struct file *filep) | |
1051 | { | |
1052 | struct IR *ir; | |
1053 | int ret; | |
1054 | ||
1055 | /* find our IR struct */ | |
1056 | unsigned minor = MINOR(node->i_rdev); | |
1057 | if (minor >= MAX_IRCTL_DEVICES) { | |
1058 | dprintk("minor %d: open result = -ENODEV\n", | |
1059 | minor); | |
1060 | return -ENODEV; | |
1061 | } | |
1062 | ir = ir_devices[minor]; | |
1063 | ||
1064 | /* increment in use count */ | |
1065 | mutex_lock(&ir->ir_lock); | |
1066 | ++ir->open; | |
1067 | ret = set_use_inc(ir); | |
1068 | if (ret != 0) { | |
1069 | --ir->open; | |
1070 | mutex_unlock(&ir->ir_lock); | |
1071 | return ret; | |
1072 | } | |
1073 | mutex_unlock(&ir->ir_lock); | |
1074 | ||
1075 | /* stash our IR struct */ | |
1076 | filep->private_data = ir; | |
1077 | ||
1078 | return 0; | |
1079 | } | |
1080 | ||
1081 | /* Close the IR device */ | |
1082 | static int close(struct inode *node, struct file *filep) | |
1083 | { | |
1084 | /* find our IR struct */ | |
e0ac7da0 | 1085 | struct IR *ir = filep->private_data; |
69b1214c JW |
1086 | if (ir == NULL) { |
1087 | zilog_error("close: no private_data attached to the file!\n"); | |
1088 | return -ENODEV; | |
1089 | } | |
1090 | ||
1091 | /* decrement in use count */ | |
1092 | mutex_lock(&ir->ir_lock); | |
1093 | --ir->open; | |
1094 | set_use_dec(ir); | |
1095 | mutex_unlock(&ir->ir_lock); | |
1096 | ||
1097 | return 0; | |
1098 | } | |
1099 | ||
1100 | static struct lirc_driver lirc_template = { | |
1101 | .name = "lirc_zilog", | |
1102 | .set_use_inc = set_use_inc, | |
1103 | .set_use_dec = set_use_dec, | |
1104 | .owner = THIS_MODULE | |
1105 | }; | |
1106 | ||
1107 | static int ir_remove(struct i2c_client *client); | |
1108 | static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id); | |
1109 | static int ir_command(struct i2c_client *client, unsigned int cmd, void *arg); | |
1110 | ||
d7c72356 AW |
1111 | #define ID_FLAG_TX 0x01 |
1112 | #define ID_FLAG_HDPVR 0x02 | |
1113 | ||
69b1214c | 1114 | static const struct i2c_device_id ir_transceiver_id[] = { |
d7c72356 AW |
1115 | { "ir_tx_z8f0811_haup", ID_FLAG_TX }, |
1116 | { "ir_rx_z8f0811_haup", 0 }, | |
1117 | { "ir_tx_z8f0811_hdpvr", ID_FLAG_HDPVR | ID_FLAG_TX }, | |
1118 | { "ir_rx_z8f0811_hdpvr", ID_FLAG_HDPVR }, | |
69b1214c JW |
1119 | { } |
1120 | }; | |
1121 | ||
1122 | static struct i2c_driver driver = { | |
1123 | .driver = { | |
1124 | .owner = THIS_MODULE, | |
1125 | .name = "Zilog/Hauppauge i2c IR", | |
1126 | }, | |
1127 | .probe = ir_probe, | |
1128 | .remove = ir_remove, | |
1129 | .command = ir_command, | |
1130 | .id_table = ir_transceiver_id, | |
1131 | }; | |
1132 | ||
0f9313ad | 1133 | static const struct file_operations lirc_fops = { |
69b1214c JW |
1134 | .owner = THIS_MODULE, |
1135 | .llseek = lseek, | |
1136 | .read = read, | |
1137 | .write = write, | |
1138 | .poll = poll, | |
1139 | .unlocked_ioctl = ioctl, | |
8be292cc JW |
1140 | #ifdef CONFIG_COMPAT |
1141 | .compat_ioctl = ioctl, | |
1142 | #endif | |
69b1214c JW |
1143 | .open = open, |
1144 | .release = close | |
1145 | }; | |
1146 | ||
1147 | static int ir_remove(struct i2c_client *client) | |
1148 | { | |
1149 | struct IR *ir = i2c_get_clientdata(client); | |
1150 | ||
1151 | mutex_lock(&ir->ir_lock); | |
1152 | ||
1153 | if (ir->have_rx || ir->have_tx) { | |
1154 | DECLARE_COMPLETION(tn); | |
1155 | DECLARE_COMPLETION(tn2); | |
1156 | ||
1157 | /* end up polling thread */ | |
1158 | if (ir->task && !IS_ERR(ir->task)) { | |
1159 | ir->t_notify = &tn; | |
1160 | ir->t_notify2 = &tn2; | |
1161 | ir->shutdown = 1; | |
1162 | wake_up_process(ir->task); | |
1163 | complete(&tn2); | |
1164 | wait_for_completion(&tn); | |
1165 | ir->t_notify = NULL; | |
1166 | ir->t_notify2 = NULL; | |
1167 | } | |
1168 | ||
1169 | } else { | |
1170 | mutex_unlock(&ir->ir_lock); | |
1171 | zilog_error("%s: detached from something we didn't " | |
1172 | "attach to\n", __func__); | |
1173 | return -ENODEV; | |
1174 | } | |
1175 | ||
1176 | /* unregister lirc driver */ | |
1177 | if (ir->l.minor >= 0 && ir->l.minor < MAX_IRCTL_DEVICES) { | |
1178 | lirc_unregister_driver(ir->l.minor); | |
1179 | ir_devices[ir->l.minor] = NULL; | |
1180 | } | |
1181 | ||
1182 | /* free memory */ | |
1183 | lirc_buffer_free(&ir->buf); | |
1184 | mutex_unlock(&ir->ir_lock); | |
1185 | kfree(ir); | |
1186 | ||
1187 | return 0; | |
1188 | } | |
1189 | ||
1190 | static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id) | |
1191 | { | |
1192 | struct IR *ir = NULL; | |
1193 | struct i2c_adapter *adap = client->adapter; | |
1194 | char buf; | |
1195 | int ret; | |
1196 | int have_rx = 0, have_tx = 0; | |
1197 | ||
d7c72356 AW |
1198 | dprintk("%s: adapter name (%s) nr %d, i2c_device_id name (%s), " |
1199 | "client addr=0x%02x\n", | |
1200 | __func__, adap->name, adap->nr, id->name, client->addr); | |
69b1214c | 1201 | |
d7c72356 AW |
1202 | /* |
1203 | * FIXME - This probe function probes both the Tx and Rx | |
1204 | * addresses of the IR microcontroller. | |
1205 | * | |
1206 | * However, the I2C subsystem is passing along one I2C client at a | |
1207 | * time, based on matches to the ir_transceiver_id[] table above. | |
1208 | * The expectation is that each i2c_client address will be probed | |
1209 | * individually by drivers so the I2C subsystem can mark all client | |
1210 | * addresses as claimed or not. | |
1211 | * | |
1212 | * This probe routine causes only one of the client addresses, TX or RX, | |
1213 | * to be claimed. This will cause a problem if the I2C subsystem is | |
1214 | * subsequently triggered to probe unclaimed clients again. | |
1215 | */ | |
69b1214c JW |
1216 | /* |
1217 | * The external IR receiver is at i2c address 0x71. | |
1218 | * The IR transmitter is at 0x70. | |
1219 | */ | |
1220 | client->addr = 0x70; | |
1221 | ||
1222 | if (!disable_tx) { | |
1223 | if (i2c_master_recv(client, &buf, 1) == 1) | |
1224 | have_tx = 1; | |
1225 | dprintk("probe 0x70 @ %s: %s\n", | |
1226 | adap->name, have_tx ? "success" : "failed"); | |
1227 | } | |
1228 | ||
1229 | if (!disable_rx) { | |
1230 | client->addr = 0x71; | |
1231 | if (i2c_master_recv(client, &buf, 1) == 1) | |
1232 | have_rx = 1; | |
1233 | dprintk("probe 0x71 @ %s: %s\n", | |
1234 | adap->name, have_rx ? "success" : "failed"); | |
1235 | } | |
1236 | ||
1237 | if (!(have_rx || have_tx)) { | |
1238 | zilog_error("%s: no devices found\n", adap->name); | |
1239 | goto out_nodev; | |
1240 | } | |
1241 | ||
1242 | printk(KERN_INFO "lirc_zilog: chip found with %s\n", | |
1243 | have_rx && have_tx ? "RX and TX" : | |
1244 | have_rx ? "RX only" : "TX only"); | |
1245 | ||
1246 | ir = kzalloc(sizeof(struct IR), GFP_KERNEL); | |
1247 | ||
1248 | if (!ir) | |
1249 | goto out_nomem; | |
1250 | ||
1251 | ret = lirc_buffer_init(&ir->buf, 2, BUFLEN / 2); | |
1252 | if (ret) | |
1253 | goto out_nomem; | |
1254 | ||
1255 | mutex_init(&ir->ir_lock); | |
1256 | mutex_init(&ir->buf_lock); | |
1257 | ir->need_boot = 1; | |
d7c72356 | 1258 | ir->is_hdpvr = (id->driver_data & ID_FLAG_HDPVR) ? true : false; |
69b1214c JW |
1259 | |
1260 | memcpy(&ir->l, &lirc_template, sizeof(struct lirc_driver)); | |
1261 | ir->l.minor = -1; | |
1262 | ||
1263 | /* I2C attach to device */ | |
1264 | i2c_set_clientdata(client, ir); | |
1265 | ||
1266 | /* initialise RX device */ | |
1267 | if (have_rx) { | |
1268 | DECLARE_COMPLETION(tn); | |
1269 | memcpy(&ir->c_rx, client, sizeof(struct i2c_client)); | |
1270 | ||
1271 | ir->c_rx.addr = 0x71; | |
1272 | strlcpy(ir->c_rx.name, ZILOG_HAUPPAUGE_IR_RX_NAME, | |
1273 | I2C_NAME_SIZE); | |
1274 | ||
1275 | /* try to fire up polling thread */ | |
1276 | ir->t_notify = &tn; | |
1277 | ir->task = kthread_run(lirc_thread, ir, "lirc_zilog"); | |
1278 | if (IS_ERR(ir->task)) { | |
1279 | ret = PTR_ERR(ir->task); | |
1280 | zilog_error("lirc_register_driver: cannot run " | |
1281 | "poll thread %d\n", ret); | |
1282 | goto err; | |
1283 | } | |
1284 | wait_for_completion(&tn); | |
1285 | ir->t_notify = NULL; | |
1286 | ir->have_rx = 1; | |
1287 | } | |
1288 | ||
1289 | /* initialise TX device */ | |
1290 | if (have_tx) { | |
1291 | memcpy(&ir->c_tx, client, sizeof(struct i2c_client)); | |
1292 | ir->c_tx.addr = 0x70; | |
1293 | strlcpy(ir->c_tx.name, ZILOG_HAUPPAUGE_IR_TX_NAME, | |
1294 | I2C_NAME_SIZE); | |
1295 | ir->have_tx = 1; | |
1296 | } | |
1297 | ||
1298 | /* set lirc_dev stuff */ | |
1299 | ir->l.code_length = 13; | |
1300 | ir->l.rbuf = &ir->buf; | |
1301 | ir->l.fops = &lirc_fops; | |
1302 | ir->l.data = ir; | |
1303 | ir->l.minor = minor; | |
1304 | ir->l.dev = &adap->dev; | |
1305 | ir->l.sample_rate = 0; | |
1306 | ||
1307 | /* register with lirc */ | |
1308 | ir->l.minor = lirc_register_driver(&ir->l); | |
1309 | if (ir->l.minor < 0 || ir->l.minor >= MAX_IRCTL_DEVICES) { | |
1310 | zilog_error("ir_attach: \"minor\" must be between 0 and %d " | |
1311 | "(%d)!\n", MAX_IRCTL_DEVICES-1, ir->l.minor); | |
1312 | ret = -EBADRQC; | |
1313 | goto err; | |
1314 | } | |
1315 | ||
1316 | /* store this for getting back in open() later on */ | |
1317 | ir_devices[ir->l.minor] = ir; | |
1318 | ||
1319 | /* | |
1320 | * if we have the tx device, load the 'firmware'. We do this | |
1321 | * after registering with lirc as otherwise hotplug seems to take | |
1322 | * 10s to create the lirc device. | |
1323 | */ | |
1324 | if (have_tx) { | |
1325 | /* Special TX init */ | |
1326 | ret = tx_init(ir); | |
1327 | if (ret != 0) | |
1328 | goto err; | |
1329 | } | |
1330 | ||
1331 | return 0; | |
1332 | ||
1333 | err: | |
1334 | /* undo everything, hopefully... */ | |
1335 | if (ir->c_rx.addr) | |
1336 | ir_remove(&ir->c_rx); | |
1337 | if (ir->c_tx.addr) | |
1338 | ir_remove(&ir->c_tx); | |
1339 | return ret; | |
1340 | ||
1341 | out_nodev: | |
1342 | zilog_error("no device found\n"); | |
1343 | return -ENODEV; | |
1344 | ||
1345 | out_nomem: | |
1346 | zilog_error("memory allocation failure\n"); | |
1347 | kfree(ir); | |
1348 | return -ENOMEM; | |
1349 | } | |
1350 | ||
1351 | static int ir_command(struct i2c_client *client, unsigned int cmd, void *arg) | |
1352 | { | |
1353 | /* nothing */ | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | static int __init zilog_init(void) | |
1358 | { | |
1359 | int ret; | |
1360 | ||
1361 | zilog_notify("Zilog/Hauppauge IR driver initializing\n"); | |
1362 | ||
1363 | mutex_init(&tx_data_lock); | |
1364 | ||
1365 | request_module("firmware_class"); | |
1366 | ||
1367 | ret = i2c_add_driver(&driver); | |
1368 | if (ret) | |
1369 | zilog_error("initialization failed\n"); | |
1370 | else | |
1371 | zilog_notify("initialization complete\n"); | |
1372 | ||
1373 | return ret; | |
1374 | } | |
1375 | ||
1376 | static void __exit zilog_exit(void) | |
1377 | { | |
1378 | i2c_del_driver(&driver); | |
1379 | /* if loaded */ | |
1380 | fw_unload(); | |
1381 | zilog_notify("Zilog/Hauppauge IR driver unloaded\n"); | |
1382 | } | |
1383 | ||
1384 | module_init(zilog_init); | |
1385 | module_exit(zilog_exit); | |
1386 | ||
1387 | MODULE_DESCRIPTION("Zilog/Hauppauge infrared transmitter driver (i2c stack)"); | |
1388 | MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, " | |
1389 | "Ulrich Mueller, Stefan Jahn, Jerome Brock, Mark Weaver"); | |
1390 | MODULE_LICENSE("GPL"); | |
1391 | /* for compat with old name, which isn't all that accurate anymore */ | |
1392 | MODULE_ALIAS("lirc_pvr150"); | |
1393 | ||
1394 | module_param(minor, int, 0444); | |
1395 | MODULE_PARM_DESC(minor, "Preferred minor device number"); | |
1396 | ||
1397 | module_param(debug, bool, 0644); | |
1398 | MODULE_PARM_DESC(debug, "Enable debugging messages"); | |
1399 | ||
1400 | module_param(disable_rx, bool, 0644); | |
1401 | MODULE_PARM_DESC(disable_rx, "Disable the IR receiver device"); | |
1402 | ||
1403 | module_param(disable_tx, bool, 0644); | |
1404 | MODULE_PARM_DESC(disable_tx, "Disable the IR transmitter device"); |