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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[cris-mirror.git] / drivers / media / usb / em28xx / em28xx-core.c
blob1d0d8cc0610387b00a6d95453a98d407670921c4
1 /*
2 em28xx-core.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
3
4 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
5 Markus Rechberger <mrechberger@gmail.com>
6 Mauro Carvalho Chehab <mchehab@infradead.org>
7 Sascha Sommer <saschasommer@freenet.de>
8 Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com>
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
25 #include "em28xx.h"
26
27 #include <linux/init.h>
28 #include <linux/jiffies.h>
29 #include <linux/list.h>
30 #include <linux/module.h>
31 #include <linux/slab.h>
32 #include <linux/usb.h>
33 #include <linux/vmalloc.h>
34 #include <sound/ac97_codec.h>
35 #include <media/v4l2-common.h>
36
37 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
38 "Markus Rechberger <mrechberger@gmail.com>, " \
39 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
40 "Sascha Sommer <saschasommer@freenet.de>"
41
42 MODULE_AUTHOR(DRIVER_AUTHOR);
43 MODULE_DESCRIPTION(DRIVER_DESC);
44 MODULE_LICENSE("GPL");
45 MODULE_VERSION(EM28XX_VERSION);
46
47 /* #define ENABLE_DEBUG_ISOC_FRAMES */
48
49 static unsigned int core_debug;
50 module_param(core_debug, int, 0644);
51 MODULE_PARM_DESC(core_debug, "enable debug messages [core and isoc]");
52
53 #define em28xx_coredbg(fmt, arg...) do { \
54 if (core_debug) \
55 dev_printk(KERN_DEBUG, &dev->intf->dev, \
56 "core: %s: " fmt, __func__, ## arg); \
57 } while (0)
58
59 static unsigned int reg_debug;
60 module_param(reg_debug, int, 0644);
61 MODULE_PARM_DESC(reg_debug, "enable debug messages [URB reg]");
62
63
64 #define em28xx_regdbg(fmt, arg...) do { \
65 if (reg_debug) \
66 dev_printk(KERN_DEBUG, &dev->intf->dev, \
67 "reg: %s: " fmt, __func__, ## arg); \
68 } while (0)
69
70 /* FIXME: don't abuse core_debug */
71 #define em28xx_isocdbg(fmt, arg...) do { \
72 if (core_debug) \
73 dev_printk(KERN_DEBUG, &dev->intf->dev, \
74 "core: %s: " fmt, __func__, ## arg); \
75 } while (0)
76
77 /*
78 * em28xx_read_reg_req()
79 * reads data from the usb device specifying bRequest
80 */
81 int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
82 char *buf, int len)
83 {
84 int ret;
85 struct usb_device *udev = interface_to_usbdev(dev->intf);
86 int pipe = usb_rcvctrlpipe(udev, 0);
87
88 if (dev->disconnected)
89 return -ENODEV;
90
91 if (len > URB_MAX_CTRL_SIZE)
92 return -EINVAL;
93
94 mutex_lock(&dev->ctrl_urb_lock);
95 ret = usb_control_msg(udev, pipe, req,
96 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
97 0x0000, reg, dev->urb_buf, len, HZ);
98 if (ret < 0) {
99 em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x failed with error %i\n",
100 pipe, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
101 req, 0, 0,
102 reg & 0xff, reg >> 8,
103 len & 0xff, len >> 8, ret);
104 mutex_unlock(&dev->ctrl_urb_lock);
105 return usb_translate_errors(ret);
106 }
107
108 if (len)
109 memcpy(buf, dev->urb_buf, len);
110
111 mutex_unlock(&dev->ctrl_urb_lock);
112
113 em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x <<< %*ph\n",
114 pipe, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
115 req, 0, 0,
116 reg & 0xff, reg >> 8,
117 len & 0xff, len >> 8, len, buf);
118
119 return ret;
120 }
121
122 /*
123 * em28xx_read_reg_req()
124 * reads data from the usb device specifying bRequest
125 */
126 int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg)
127 {
128 int ret;
129 u8 val;
130
131 ret = em28xx_read_reg_req_len(dev, req, reg, &val, 1);
132 if (ret < 0)
133 return ret;
134
135 return val;
136 }
137
138 int em28xx_read_reg(struct em28xx *dev, u16 reg)
139 {
140 return em28xx_read_reg_req(dev, USB_REQ_GET_STATUS, reg);
141 }
142 EXPORT_SYMBOL_GPL(em28xx_read_reg);
143
144 /*
145 * em28xx_write_regs_req()
146 * sends data to the usb device, specifying bRequest
147 */
148 int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
149 int len)
150 {
151 int ret;
152 struct usb_device *udev = interface_to_usbdev(dev->intf);
153 int pipe = usb_sndctrlpipe(udev, 0);
154
155 if (dev->disconnected)
156 return -ENODEV;
157
158 if ((len < 1) || (len > URB_MAX_CTRL_SIZE))
159 return -EINVAL;
160
161 mutex_lock(&dev->ctrl_urb_lock);
162 memcpy(dev->urb_buf, buf, len);
163 ret = usb_control_msg(udev, pipe, req,
164 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
165 0x0000, reg, dev->urb_buf, len, HZ);
166 mutex_unlock(&dev->ctrl_urb_lock);
167
168 if (ret < 0) {
169 em28xx_regdbg("(pipe 0x%08x): OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>> %*ph failed with error %i\n",
170 pipe,
171 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
172 req, 0, 0,
173 reg & 0xff, reg >> 8,
174 len & 0xff, len >> 8, len, buf, ret);
175 return usb_translate_errors(ret);
176 }
177
178 em28xx_regdbg("(pipe 0x%08x): OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>> %*ph\n",
179 pipe,
180 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
181 req, 0, 0,
182 reg & 0xff, reg >> 8,
183 len & 0xff, len >> 8, len, buf);
184
185 if (dev->wait_after_write)
186 msleep(dev->wait_after_write);
187
188 return ret;
189 }
190
191 int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len)
192 {
193 return em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len);
194 }
195 EXPORT_SYMBOL_GPL(em28xx_write_regs);
196
197 /* Write a single register */
198 int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val)
199 {
200 return em28xx_write_regs(dev, reg, &val, 1);
201 }
202 EXPORT_SYMBOL_GPL(em28xx_write_reg);
203
204 /*
205 * em28xx_write_reg_bits()
206 * sets only some bits (specified by bitmask) of a register, by first reading
207 * the actual value
208 */
209 int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val,
210 u8 bitmask)
211 {
212 int oldval;
213 u8 newval;
214
215 oldval = em28xx_read_reg(dev, reg);
216 if (oldval < 0)
217 return oldval;
218
219 newval = (((u8)oldval) & ~bitmask) | (val & bitmask);
220
221 return em28xx_write_regs(dev, reg, &newval, 1);
222 }
223 EXPORT_SYMBOL_GPL(em28xx_write_reg_bits);
224
225 /*
226 * em28xx_toggle_reg_bits()
227 * toggles/inverts the bits (specified by bitmask) of a register
228 */
229 int em28xx_toggle_reg_bits(struct em28xx *dev, u16 reg, u8 bitmask)
230 {
231 int oldval;
232 u8 newval;
233
234 oldval = em28xx_read_reg(dev, reg);
235 if (oldval < 0)
236 return oldval;
237
238 newval = (~oldval & bitmask) | (oldval & ~bitmask);
239
240 return em28xx_write_reg(dev, reg, newval);
241 }
242 EXPORT_SYMBOL_GPL(em28xx_toggle_reg_bits);
243
244 /*
245 * em28xx_is_ac97_ready()
246 * Checks if ac97 is ready
247 */
248 static int em28xx_is_ac97_ready(struct em28xx *dev)
249 {
250 unsigned long timeout = jiffies + msecs_to_jiffies(EM28XX_AC97_XFER_TIMEOUT);
251 int ret;
252
253 /* Wait up to 50 ms for AC97 command to complete */
254 while (time_is_after_jiffies(timeout)) {
255 ret = em28xx_read_reg(dev, EM28XX_R43_AC97BUSY);
256 if (ret < 0)
257 return ret;
258
259 if (!(ret & 0x01))
260 return 0;
261 msleep(5);
262 }
263
264 dev_warn(&dev->intf->dev,
265 "AC97 command still being executed: not handled properly!\n");
266 return -EBUSY;
267 }
268
269 /*
270 * em28xx_read_ac97()
271 * write a 16 bit value to the specified AC97 address (LSB first!)
272 */
273 int em28xx_read_ac97(struct em28xx *dev, u8 reg)
274 {
275 int ret;
276 u8 addr = (reg & 0x7f) | 0x80;
277 __le16 val;
278
279 ret = em28xx_is_ac97_ready(dev);
280 if (ret < 0)
281 return ret;
282
283 ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
284 if (ret < 0)
285 return ret;
286
287 ret = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R40_AC97LSB,
288 (u8 *)&val, sizeof(val));
289
290 if (ret < 0)
291 return ret;
292 return le16_to_cpu(val);
293 }
294 EXPORT_SYMBOL_GPL(em28xx_read_ac97);
295
296 /*
297 * em28xx_write_ac97()
298 * write a 16 bit value to the specified AC97 address (LSB first!)
299 */
300 int em28xx_write_ac97(struct em28xx *dev, u8 reg, u16 val)
301 {
302 int ret;
303 u8 addr = reg & 0x7f;
304 __le16 value;
305
306 value = cpu_to_le16(val);
307
308 ret = em28xx_is_ac97_ready(dev);
309 if (ret < 0)
310 return ret;
311
312 ret = em28xx_write_regs(dev, EM28XX_R40_AC97LSB, (u8 *)&value, 2);
313 if (ret < 0)
314 return ret;
315
316 ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
317 if (ret < 0)
318 return ret;
319
320 return 0;
321 }
322 EXPORT_SYMBOL_GPL(em28xx_write_ac97);
323
324 struct em28xx_vol_itable {
325 enum em28xx_amux mux;
326 u8 reg;
327 };
328
329 static struct em28xx_vol_itable inputs[] = {
330 { EM28XX_AMUX_VIDEO, AC97_VIDEO },
331 { EM28XX_AMUX_LINE_IN, AC97_LINE },
332 { EM28XX_AMUX_PHONE, AC97_PHONE },
333 { EM28XX_AMUX_MIC, AC97_MIC },
334 { EM28XX_AMUX_CD, AC97_CD },
335 { EM28XX_AMUX_AUX, AC97_AUX },
336 { EM28XX_AMUX_PCM_OUT, AC97_PCM },
337 };
338
339 static int set_ac97_input(struct em28xx *dev)
340 {
341 int ret, i;
342 enum em28xx_amux amux = dev->ctl_ainput;
343
344 /* EM28XX_AMUX_VIDEO2 is a special case used to indicate that
345 em28xx should point to LINE IN, while AC97 should use VIDEO
346 */
347 if (amux == EM28XX_AMUX_VIDEO2)
348 amux = EM28XX_AMUX_VIDEO;
349
350 /* Mute all entres but the one that were selected */
351 for (i = 0; i < ARRAY_SIZE(inputs); i++) {
352 if (amux == inputs[i].mux)
353 ret = em28xx_write_ac97(dev, inputs[i].reg, 0x0808);
354 else
355 ret = em28xx_write_ac97(dev, inputs[i].reg, 0x8000);
356
357 if (ret < 0)
358 dev_warn(&dev->intf->dev,
359 "couldn't setup AC97 register %d\n",
360 inputs[i].reg);
361 }
362 return 0;
363 }
364
365 static int em28xx_set_audio_source(struct em28xx *dev)
366 {
367 int ret;
368 u8 input;
369
370 if (dev->board.is_em2800) {
371 if (dev->ctl_ainput == EM28XX_AMUX_VIDEO)
372 input = EM2800_AUDIO_SRC_TUNER;
373 else
374 input = EM2800_AUDIO_SRC_LINE;
375
376 ret = em28xx_write_regs(dev, EM2800_R08_AUDIOSRC, &input, 1);
377 if (ret < 0)
378 return ret;
379 }
380
381 if (dev->board.has_msp34xx)
382 input = EM28XX_AUDIO_SRC_TUNER;
383 else {
384 switch (dev->ctl_ainput) {
385 case EM28XX_AMUX_VIDEO:
386 input = EM28XX_AUDIO_SRC_TUNER;
387 break;
388 default:
389 input = EM28XX_AUDIO_SRC_LINE;
390 break;
391 }
392 }
393
394 if (dev->board.mute_gpio && dev->mute)
395 em28xx_gpio_set(dev, dev->board.mute_gpio);
396 else
397 em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
398
399 ret = em28xx_write_reg_bits(dev, EM28XX_R0E_AUDIOSRC, input, 0xc0);
400 if (ret < 0)
401 return ret;
402 msleep(5);
403
404 switch (dev->audio_mode.ac97) {
405 case EM28XX_NO_AC97:
406 break;
407 default:
408 ret = set_ac97_input(dev);
409 }
410
411 return ret;
412 }
413
414 struct em28xx_vol_otable {
415 enum em28xx_aout mux;
416 u8 reg;
417 };
418
419 static const struct em28xx_vol_otable outputs[] = {
420 { EM28XX_AOUT_MASTER, AC97_MASTER },
421 { EM28XX_AOUT_LINE, AC97_HEADPHONE },
422 { EM28XX_AOUT_MONO, AC97_MASTER_MONO },
423 { EM28XX_AOUT_LFE, AC97_CENTER_LFE_MASTER },
424 { EM28XX_AOUT_SURR, AC97_SURROUND_MASTER },
425 };
426
427 int em28xx_audio_analog_set(struct em28xx *dev)
428 {
429 int ret, i;
430 u8 xclk;
431
432 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE)
433 return 0;
434
435 /* It is assumed that all devices use master volume for output.
436 It would be possible to use also line output.
437 */
438 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
439 /* Mute all outputs */
440 for (i = 0; i < ARRAY_SIZE(outputs); i++) {
441 ret = em28xx_write_ac97(dev, outputs[i].reg, 0x8000);
442 if (ret < 0)
443 dev_warn(&dev->intf->dev,
444 "couldn't setup AC97 register %d\n",
445 outputs[i].reg);
446 }
447 }
448
449 xclk = dev->board.xclk & 0x7f;
450 if (!dev->mute)
451 xclk |= EM28XX_XCLK_AUDIO_UNMUTE;
452
453 ret = em28xx_write_reg(dev, EM28XX_R0F_XCLK, xclk);
454 if (ret < 0)
455 return ret;
456 msleep(10);
457
458 /* Selects the proper audio input */
459 ret = em28xx_set_audio_source(dev);
460
461 /* Sets volume */
462 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
463 int vol;
464
465 em28xx_write_ac97(dev, AC97_POWERDOWN, 0x4200);
466 em28xx_write_ac97(dev, AC97_EXTENDED_STATUS, 0x0031);
467 em28xx_write_ac97(dev, AC97_PCM_LR_ADC_RATE, 0xbb80);
468
469 /* LSB: left channel - both channels with the same level */
470 vol = (0x1f - dev->volume) | ((0x1f - dev->volume) << 8);
471
472 /* Mute device, if needed */
473 if (dev->mute)
474 vol |= 0x8000;
475
476 /* Sets volume */
477 for (i = 0; i < ARRAY_SIZE(outputs); i++) {
478 if (dev->ctl_aoutput & outputs[i].mux)
479 ret = em28xx_write_ac97(dev, outputs[i].reg,
480 vol);
481 if (ret < 0)
482 dev_warn(&dev->intf->dev,
483 "couldn't setup AC97 register %d\n",
484 outputs[i].reg);
485 }
486
487 if (dev->ctl_aoutput & EM28XX_AOUT_PCM_IN) {
488 int sel = ac97_return_record_select(dev->ctl_aoutput);
489
490 /* Use the same input for both left and right
491 channels */
492 sel |= (sel << 8);
493
494 em28xx_write_ac97(dev, AC97_REC_SEL, sel);
495 }
496 }
497
498 return ret;
499 }
500 EXPORT_SYMBOL_GPL(em28xx_audio_analog_set);
501
502 int em28xx_audio_setup(struct em28xx *dev)
503 {
504 int vid1, vid2, feat, cfg;
505 u32 vid = 0;
506 u8 i2s_samplerates;
507
508 if (dev->chip_id == CHIP_ID_EM2870 ||
509 dev->chip_id == CHIP_ID_EM2874 ||
510 dev->chip_id == CHIP_ID_EM28174 ||
511 dev->chip_id == CHIP_ID_EM28178) {
512 /* Digital only device - don't load any alsa module */
513 dev->int_audio_type = EM28XX_INT_AUDIO_NONE;
514 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE;
515 return 0;
516 }
517
518 /* See how this device is configured */
519 cfg = em28xx_read_reg(dev, EM28XX_R00_CHIPCFG);
520 dev_info(&dev->intf->dev, "Config register raw data: 0x%02x\n", cfg);
521 if (cfg < 0) { /* Register read error */
522 /* Be conservative */
523 dev->int_audio_type = EM28XX_INT_AUDIO_AC97;
524 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) == 0x00) {
525 /* The device doesn't have vendor audio at all */
526 dev->int_audio_type = EM28XX_INT_AUDIO_NONE;
527 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE;
528 return 0;
529 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) != EM28XX_CHIPCFG_AC97) {
530 dev->int_audio_type = EM28XX_INT_AUDIO_I2S;
531 if (dev->chip_id < CHIP_ID_EM2860 &&
532 (cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
533 EM2820_CHIPCFG_I2S_1_SAMPRATE)
534 i2s_samplerates = 1;
535 else if (dev->chip_id >= CHIP_ID_EM2860 &&
536 (cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
537 EM2860_CHIPCFG_I2S_5_SAMPRATES)
538 i2s_samplerates = 5;
539 else
540 i2s_samplerates = 3;
541 dev_info(&dev->intf->dev, "I2S Audio (%d sample rate(s))\n",
542 i2s_samplerates);
543 /* Skip the code that does AC97 vendor detection */
544 dev->audio_mode.ac97 = EM28XX_NO_AC97;
545 goto init_audio;
546 } else {
547 dev->int_audio_type = EM28XX_INT_AUDIO_AC97;
548 }
549
550 dev->audio_mode.ac97 = EM28XX_AC97_OTHER;
551
552 vid1 = em28xx_read_ac97(dev, AC97_VENDOR_ID1);
553 if (vid1 < 0) {
554 /*
555 * Device likely doesn't support AC97
556 * Note: (some) em2800 devices without eeprom reports 0x91 on
557 * CHIPCFG register, even not having an AC97 chip
558 */
559 dev_warn(&dev->intf->dev,
560 "AC97 chip type couldn't be determined\n");
561 dev->audio_mode.ac97 = EM28XX_NO_AC97;
562 if (dev->usb_audio_type == EM28XX_USB_AUDIO_VENDOR)
563 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE;
564 dev->int_audio_type = EM28XX_INT_AUDIO_NONE;
565 goto init_audio;
566 }
567
568 vid2 = em28xx_read_ac97(dev, AC97_VENDOR_ID2);
569 if (vid2 < 0)
570 goto init_audio;
571
572 vid = vid1 << 16 | vid2;
573 dev_warn(&dev->intf->dev, "AC97 vendor ID = 0x%08x\n", vid);
574
575 feat = em28xx_read_ac97(dev, AC97_RESET);
576 if (feat < 0)
577 goto init_audio;
578
579 dev_warn(&dev->intf->dev, "AC97 features = 0x%04x\n", feat);
580
581 /* Try to identify what audio processor we have */
582 if (((vid == 0xffffffff) || (vid == 0x83847650)) && (feat == 0x6a90))
583 dev->audio_mode.ac97 = EM28XX_AC97_EM202;
584 else if ((vid >> 8) == 0x838476)
585 dev->audio_mode.ac97 = EM28XX_AC97_SIGMATEL;
586
587 init_audio:
588 /* Reports detected AC97 processor */
589 switch (dev->audio_mode.ac97) {
590 case EM28XX_NO_AC97:
591 dev_info(&dev->intf->dev, "No AC97 audio processor\n");
592 break;
593 case EM28XX_AC97_EM202:
594 dev_info(&dev->intf->dev,
595 "Empia 202 AC97 audio processor detected\n");
596 break;
597 case EM28XX_AC97_SIGMATEL:
598 dev_info(&dev->intf->dev,
599 "Sigmatel audio processor detected (stac 97%02x)\n",
600 vid & 0xff);
601 break;
602 case EM28XX_AC97_OTHER:
603 dev_warn(&dev->intf->dev,
604 "Unknown AC97 audio processor detected!\n");
605 break;
606 default:
607 break;
608 }
609
610 return em28xx_audio_analog_set(dev);
611 }
612 EXPORT_SYMBOL_GPL(em28xx_audio_setup);
613
614 const struct em28xx_led *em28xx_find_led(struct em28xx *dev,
615 enum em28xx_led_role role)
616 {
617 if (dev->board.leds) {
618 u8 k = 0;
619
620 while (dev->board.leds[k].role >= 0 &&
621 dev->board.leds[k].role < EM28XX_NUM_LED_ROLES) {
622 if (dev->board.leds[k].role == role)
623 return &dev->board.leds[k];
624 k++;
625 }
626 }
627 return NULL;
628 }
629 EXPORT_SYMBOL_GPL(em28xx_find_led);
630
631 int em28xx_capture_start(struct em28xx *dev, int start)
632 {
633 int rc;
634 const struct em28xx_led *led = NULL;
635
636 if (dev->chip_id == CHIP_ID_EM2874 ||
637 dev->chip_id == CHIP_ID_EM2884 ||
638 dev->chip_id == CHIP_ID_EM28174 ||
639 dev->chip_id == CHIP_ID_EM28178) {
640 /* The Transport Stream Enable Register moved in em2874 */
641 rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE,
642 start ?
643 EM2874_TS1_CAPTURE_ENABLE : 0x00,
644 EM2874_TS1_CAPTURE_ENABLE);
645 } else {
646 /* FIXME: which is the best order? */
647 /* video registers are sampled by VREF */
648 rc = em28xx_write_reg_bits(dev, EM28XX_R0C_USBSUSP,
649 start ? 0x10 : 0x00, 0x10);
650 if (rc < 0)
651 return rc;
652
653 if (start) {
654 if (dev->board.is_webcam)
655 rc = em28xx_write_reg(dev, 0x13, 0x0c);
656
657 /* Enable video capture */
658 rc = em28xx_write_reg(dev, 0x48, 0x00);
659 if (rc < 0)
660 return rc;
661
662 if (dev->mode == EM28XX_ANALOG_MODE)
663 rc = em28xx_write_reg(dev,
664 EM28XX_R12_VINENABLE,
665 0x67);
666 else
667 rc = em28xx_write_reg(dev,
668 EM28XX_R12_VINENABLE,
669 0x37);
670 if (rc < 0)
671 return rc;
672
673 msleep(6);
674 } else {
675 /* disable video capture */
676 rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x27);
677 }
678 }
679
680 if (dev->mode == EM28XX_ANALOG_MODE)
681 led = em28xx_find_led(dev, EM28XX_LED_ANALOG_CAPTURING);
682 else
683 led = em28xx_find_led(dev, EM28XX_LED_DIGITAL_CAPTURING);
684
685 if (led)
686 em28xx_write_reg_bits(dev, led->gpio_reg,
687 (!start ^ led->inverted) ?
688 ~led->gpio_mask : led->gpio_mask,
689 led->gpio_mask);
690
691 return rc;
692 }
693
694 int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio)
695 {
696 int rc = 0;
697
698 if (!gpio)
699 return rc;
700
701 if (dev->mode != EM28XX_SUSPEND) {
702 em28xx_write_reg(dev, 0x48, 0x00);
703 if (dev->mode == EM28XX_ANALOG_MODE)
704 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67);
705 else
706 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37);
707 msleep(6);
708 }
709
710 /* Send GPIO reset sequences specified at board entry */
711 while (gpio->sleep >= 0) {
712 if (gpio->reg >= 0) {
713 rc = em28xx_write_reg_bits(dev,
714 gpio->reg,
715 gpio->val,
716 gpio->mask);
717 if (rc < 0)
718 return rc;
719 }
720 if (gpio->sleep > 0)
721 msleep(gpio->sleep);
722
723 gpio++;
724 }
725 return rc;
726 }
727 EXPORT_SYMBOL_GPL(em28xx_gpio_set);
728
729 int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode)
730 {
731 if (dev->mode == set_mode)
732 return 0;
733
734 if (set_mode == EM28XX_SUSPEND) {
735 dev->mode = set_mode;
736
737 /* FIXME: add suspend support for ac97 */
738
739 return em28xx_gpio_set(dev, dev->board.suspend_gpio);
740 }
741
742 dev->mode = set_mode;
743
744 if (dev->mode == EM28XX_DIGITAL_MODE)
745 return em28xx_gpio_set(dev, dev->board.dvb_gpio);
746 else
747 return em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
748 }
749 EXPORT_SYMBOL_GPL(em28xx_set_mode);
750
751 /* ------------------------------------------------------------------
752 URB control
753 ------------------------------------------------------------------*/
754
755 /*
756 * URB completion handler for isoc/bulk transfers
757 */
758 static void em28xx_irq_callback(struct urb *urb)
759 {
760 struct em28xx *dev = urb->context;
761 int i;
762
763 switch (urb->status) {
764 case 0: /* success */
765 case -ETIMEDOUT: /* NAK */
766 break;
767 case -ECONNRESET: /* kill */
768 case -ENOENT:
769 case -ESHUTDOWN:
770 return;
771 default: /* error */
772 em28xx_isocdbg("urb completition error %d.\n", urb->status);
773 break;
774 }
775
776 /* Copy data from URB */
777 spin_lock(&dev->slock);
778 dev->usb_ctl.urb_data_copy(dev, urb);
779 spin_unlock(&dev->slock);
780
781 /* Reset urb buffers */
782 for (i = 0; i < urb->number_of_packets; i++) {
783 /* isoc only (bulk: number_of_packets = 0) */
784 urb->iso_frame_desc[i].status = 0;
785 urb->iso_frame_desc[i].actual_length = 0;
786 }
787 urb->status = 0;
788
789 urb->status = usb_submit_urb(urb, GFP_ATOMIC);
790 if (urb->status) {
791 em28xx_isocdbg("urb resubmit failed (error=%i)\n",
792 urb->status);
793 }
794 }
795
796 /*
797 * Stop and Deallocate URBs
798 */
799 void em28xx_uninit_usb_xfer(struct em28xx *dev, enum em28xx_mode mode)
800 {
801 struct urb *urb;
802 struct em28xx_usb_bufs *usb_bufs;
803 struct usb_device *udev = interface_to_usbdev(dev->intf);
804 int i;
805
806 em28xx_isocdbg("em28xx: called em28xx_uninit_usb_xfer in mode %d\n",
807 mode);
808
809 if (mode == EM28XX_DIGITAL_MODE)
810 usb_bufs = &dev->usb_ctl.digital_bufs;
811 else
812 usb_bufs = &dev->usb_ctl.analog_bufs;
813
814 for (i = 0; i < usb_bufs->num_bufs; i++) {
815 urb = usb_bufs->urb[i];
816 if (urb) {
817 if (!irqs_disabled())
818 usb_kill_urb(urb);
819 else
820 usb_unlink_urb(urb);
821
822 if (usb_bufs->transfer_buffer[i]) {
823 usb_free_coherent(udev,
824 urb->transfer_buffer_length,
825 usb_bufs->transfer_buffer[i],
826 urb->transfer_dma);
827 }
828 usb_free_urb(urb);
829 usb_bufs->urb[i] = NULL;
830 }
831 usb_bufs->transfer_buffer[i] = NULL;
832 }
833
834 kfree(usb_bufs->urb);
835 kfree(usb_bufs->transfer_buffer);
836
837 usb_bufs->urb = NULL;
838 usb_bufs->transfer_buffer = NULL;
839 usb_bufs->num_bufs = 0;
840
841 em28xx_capture_start(dev, 0);
842 }
843 EXPORT_SYMBOL_GPL(em28xx_uninit_usb_xfer);
844
845 /*
846 * Stop URBs
847 */
848 void em28xx_stop_urbs(struct em28xx *dev)
849 {
850 int i;
851 struct urb *urb;
852 struct em28xx_usb_bufs *isoc_bufs = &dev->usb_ctl.digital_bufs;
853
854 em28xx_isocdbg("em28xx: called em28xx_stop_urbs\n");
855
856 for (i = 0; i < isoc_bufs->num_bufs; i++) {
857 urb = isoc_bufs->urb[i];
858 if (urb) {
859 if (!irqs_disabled())
860 usb_kill_urb(urb);
861 else
862 usb_unlink_urb(urb);
863 }
864 }
865
866 em28xx_capture_start(dev, 0);
867 }
868 EXPORT_SYMBOL_GPL(em28xx_stop_urbs);
869
870 /*
871 * Allocate URBs
872 */
873 int em28xx_alloc_urbs(struct em28xx *dev, enum em28xx_mode mode, int xfer_bulk,
874 int num_bufs, int max_pkt_size, int packet_multiplier)
875 {
876 struct em28xx_usb_bufs *usb_bufs;
877 struct urb *urb;
878 struct usb_device *udev = interface_to_usbdev(dev->intf);
879 int i;
880 int sb_size, pipe;
881 int j, k;
882
883 em28xx_isocdbg("em28xx: called em28xx_alloc_isoc in mode %d\n", mode);
884
885 /* Check mode and if we have an endpoint for the selected
886 transfer type, select buffer */
887 if (mode == EM28XX_DIGITAL_MODE) {
888 if ((xfer_bulk && !dev->dvb_ep_bulk) ||
889 (!xfer_bulk && !dev->dvb_ep_isoc)) {
890 dev_err(&dev->intf->dev,
891 "no endpoint for DVB mode and transfer type %d\n",
892 xfer_bulk > 0);
893 return -EINVAL;
894 }
895 usb_bufs = &dev->usb_ctl.digital_bufs;
896 } else if (mode == EM28XX_ANALOG_MODE) {
897 if ((xfer_bulk && !dev->analog_ep_bulk) ||
898 (!xfer_bulk && !dev->analog_ep_isoc)) {
899 dev_err(&dev->intf->dev,
900 "no endpoint for analog mode and transfer type %d\n",
901 xfer_bulk > 0);
902 return -EINVAL;
903 }
904 usb_bufs = &dev->usb_ctl.analog_bufs;
905 } else {
906 dev_err(&dev->intf->dev, "invalid mode selected\n");
907 return -EINVAL;
908 }
909
910 /* De-allocates all pending stuff */
911 em28xx_uninit_usb_xfer(dev, mode);
912
913 usb_bufs->num_bufs = num_bufs;
914
915 usb_bufs->urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
916 if (!usb_bufs->urb)
917 return -ENOMEM;
918
919 usb_bufs->transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
920 GFP_KERNEL);
921 if (!usb_bufs->transfer_buffer) {
922 kfree(usb_bufs->urb);
923 return -ENOMEM;
924 }
925
926 usb_bufs->max_pkt_size = max_pkt_size;
927 if (xfer_bulk)
928 usb_bufs->num_packets = 0;
929 else
930 usb_bufs->num_packets = packet_multiplier;
931 dev->usb_ctl.vid_buf = NULL;
932 dev->usb_ctl.vbi_buf = NULL;
933
934 sb_size = packet_multiplier * usb_bufs->max_pkt_size;
935
936 /* allocate urbs and transfer buffers */
937 for (i = 0; i < usb_bufs->num_bufs; i++) {
938 urb = usb_alloc_urb(usb_bufs->num_packets, GFP_KERNEL);
939 if (!urb) {
940 em28xx_uninit_usb_xfer(dev, mode);
941 return -ENOMEM;
942 }
943 usb_bufs->urb[i] = urb;
944
945 usb_bufs->transfer_buffer[i] = usb_alloc_coherent(udev,
946 sb_size, GFP_KERNEL, &urb->transfer_dma);
947 if (!usb_bufs->transfer_buffer[i]) {
948 dev_err(&dev->intf->dev,
949 "unable to allocate %i bytes for transfer buffer %i%s\n",
950 sb_size, i,
951 in_interrupt() ? " while in int" : "");
952 em28xx_uninit_usb_xfer(dev, mode);
953 return -ENOMEM;
954 }
955 memset(usb_bufs->transfer_buffer[i], 0, sb_size);
956
957 if (xfer_bulk) { /* bulk */
958 pipe = usb_rcvbulkpipe(udev,
959 mode == EM28XX_ANALOG_MODE ?
960 dev->analog_ep_bulk :
961 dev->dvb_ep_bulk);
962 usb_fill_bulk_urb(urb, udev, pipe,
963 usb_bufs->transfer_buffer[i], sb_size,
964 em28xx_irq_callback, dev);
965 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
966 } else { /* isoc */
967 pipe = usb_rcvisocpipe(udev,
968 mode == EM28XX_ANALOG_MODE ?
969 dev->analog_ep_isoc :
970 dev->dvb_ep_isoc);
971 usb_fill_int_urb(urb, udev, pipe,
972 usb_bufs->transfer_buffer[i], sb_size,
973 em28xx_irq_callback, dev, 1);
974 urb->transfer_flags = URB_ISO_ASAP |
975 URB_NO_TRANSFER_DMA_MAP;
976 k = 0;
977 for (j = 0; j < usb_bufs->num_packets; j++) {
978 urb->iso_frame_desc[j].offset = k;
979 urb->iso_frame_desc[j].length =
980 usb_bufs->max_pkt_size;
981 k += usb_bufs->max_pkt_size;
982 }
983 }
984
985 urb->number_of_packets = usb_bufs->num_packets;
986 }
987
988 return 0;
989 }
990 EXPORT_SYMBOL_GPL(em28xx_alloc_urbs);
991
992 /*
993 * Allocate URBs and start IRQ
994 */
995 int em28xx_init_usb_xfer(struct em28xx *dev, enum em28xx_mode mode,
996 int xfer_bulk, int num_bufs, int max_pkt_size,
997 int packet_multiplier,
998 int (*urb_data_copy)(struct em28xx *dev, struct urb *urb))
999 {
1000 struct em28xx_dmaqueue *dma_q = &dev->vidq;
1001 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
1002 struct em28xx_usb_bufs *usb_bufs;
1003 struct usb_device *udev = interface_to_usbdev(dev->intf);
1004 int i;
1005 int rc;
1006 int alloc;
1007
1008 em28xx_isocdbg("em28xx: called em28xx_init_usb_xfer in mode %d\n",
1009 mode);
1010
1011 dev->usb_ctl.urb_data_copy = urb_data_copy;
1012
1013 if (mode == EM28XX_DIGITAL_MODE) {
1014 usb_bufs = &dev->usb_ctl.digital_bufs;
1015 /* no need to free/alloc usb buffers in digital mode */
1016 alloc = 0;
1017 } else {
1018 usb_bufs = &dev->usb_ctl.analog_bufs;
1019 alloc = 1;
1020 }
1021
1022 if (alloc) {
1023 rc = em28xx_alloc_urbs(dev, mode, xfer_bulk, num_bufs,
1024 max_pkt_size, packet_multiplier);
1025 if (rc)
1026 return rc;
1027 }
1028
1029 if (xfer_bulk) {
1030 rc = usb_clear_halt(udev, usb_bufs->urb[0]->pipe);
1031 if (rc < 0) {
1032 dev_err(&dev->intf->dev,
1033 "failed to clear USB bulk endpoint stall/halt condition (error=%i)\n",
1034 rc);
1035 em28xx_uninit_usb_xfer(dev, mode);
1036 return rc;
1037 }
1038 }
1039
1040 init_waitqueue_head(&dma_q->wq);
1041 init_waitqueue_head(&vbi_dma_q->wq);
1042
1043 em28xx_capture_start(dev, 1);
1044
1045 /* submit urbs and enables IRQ */
1046 for (i = 0; i < usb_bufs->num_bufs; i++) {
1047 rc = usb_submit_urb(usb_bufs->urb[i], GFP_ATOMIC);
1048 if (rc) {
1049 dev_err(&dev->intf->dev,
1050 "submit of urb %i failed (error=%i)\n", i, rc);
1051 em28xx_uninit_usb_xfer(dev, mode);
1052 return rc;
1053 }
1054 }
1055
1056 return 0;
1057 }
1058 EXPORT_SYMBOL_GPL(em28xx_init_usb_xfer);
1059
1060 /*
1061 * Device control list
1062 */
1063
1064 static LIST_HEAD(em28xx_devlist);
1065 static DEFINE_MUTEX(em28xx_devlist_mutex);
1066
1067 /*
1068 * Extension interface
1069 */
1070
1071 static LIST_HEAD(em28xx_extension_devlist);
1072
1073 int em28xx_register_extension(struct em28xx_ops *ops)
1074 {
1075 struct em28xx *dev = NULL;
1076
1077 mutex_lock(&em28xx_devlist_mutex);
1078 list_add_tail(&ops->next, &em28xx_extension_devlist);
1079 list_for_each_entry(dev, &em28xx_devlist, devlist) {
1080 ops->init(dev);
1081 }
1082 mutex_unlock(&em28xx_devlist_mutex);
1083 pr_info("em28xx: Registered (%s) extension\n", ops->name);
1084 return 0;
1085 }
1086 EXPORT_SYMBOL(em28xx_register_extension);
1087
1088 void em28xx_unregister_extension(struct em28xx_ops *ops)
1089 {
1090 struct em28xx *dev = NULL;
1091
1092 mutex_lock(&em28xx_devlist_mutex);
1093 list_for_each_entry(dev, &em28xx_devlist, devlist) {
1094 ops->fini(dev);
1095 }
1096 list_del(&ops->next);
1097 mutex_unlock(&em28xx_devlist_mutex);
1098 pr_info("em28xx: Removed (%s) extension\n", ops->name);
1099 }
1100 EXPORT_SYMBOL(em28xx_unregister_extension);
1101
1102 void em28xx_init_extension(struct em28xx *dev)
1103 {
1104 const struct em28xx_ops *ops = NULL;
1105
1106 mutex_lock(&em28xx_devlist_mutex);
1107 list_add_tail(&dev->devlist, &em28xx_devlist);
1108 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1109 if (ops->init)
1110 ops->init(dev);
1111 }
1112 mutex_unlock(&em28xx_devlist_mutex);
1113 }
1114
1115 void em28xx_close_extension(struct em28xx *dev)
1116 {
1117 const struct em28xx_ops *ops = NULL;
1118
1119 mutex_lock(&em28xx_devlist_mutex);
1120 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1121 if (ops->fini)
1122 ops->fini(dev);
1123 }
1124 list_del(&dev->devlist);
1125 mutex_unlock(&em28xx_devlist_mutex);
1126 }
1127
1128 int em28xx_suspend_extension(struct em28xx *dev)
1129 {
1130 const struct em28xx_ops *ops = NULL;
1131
1132 dev_info(&dev->intf->dev, "Suspending extensions\n");
1133 mutex_lock(&em28xx_devlist_mutex);
1134 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1135 if (ops->suspend)
1136 ops->suspend(dev);
1137 }
1138 mutex_unlock(&em28xx_devlist_mutex);
1139 return 0;
1140 }
1141
1142 int em28xx_resume_extension(struct em28xx *dev)
1143 {
1144 const struct em28xx_ops *ops = NULL;
1145
1146 dev_info(&dev->intf->dev, "Resuming extensions\n");
1147 mutex_lock(&em28xx_devlist_mutex);
1148 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1149 if (ops->resume)
1150 ops->resume(dev);
1151 }
1152 mutex_unlock(&em28xx_devlist_mutex);
1153 return 0;
1154 }
CRIS linux kernel tree