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V4L/DVB (10525): em28xx: Coding style fixes and a typo correction
[deliverable/linux.git] / drivers / media / video / em28xx / em28xx-core.c
CommitLineData
a6c2ba28 1/*
3acf2809 2 em28xx-core.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
a6c2ba28 3
f7abcd38
MCC		 4 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
5 Markus Rechberger <mrechberger@gmail.com>
2e7c6dc3 6 Mauro Carvalho Chehab <mchehab@infradead.org>
f7abcd38 7 Sascha Sommer <saschasommer@freenet.de>
a6c2ba28 8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24#include <linux/init.h>
25#include <linux/list.h>
26#include <linux/module.h>
a6c2ba28 27#include <linux/usb.h>
28#include <linux/vmalloc.h>
1a23f81b 29#include <media/v4l2-common.h>
a6c2ba28 30
f7abcd38 31#include "em28xx.h"
a6c2ba28 32
33/* #define ENABLE_DEBUG_ISOC_FRAMES */
34
ff699e6b 35static unsigned int core_debug;
a1a6ee74
NS		 36module_param(core_debug, int, 0644);
37MODULE_PARM_DESC(core_debug, "enable debug messages [core]");
a6c2ba28 38
3acf2809 39#define em28xx_coredbg(fmt, arg...) do {\
4ac97914
MCC		 40 if (core_debug) \
41 printk(KERN_INFO "%s %s :"fmt, \
d80e134d 42 dev->name, __func__ , ##arg); } while (0)
a6c2ba28 43
ff699e6b 44static unsigned int reg_debug;
a1a6ee74
NS		 45module_param(reg_debug, int, 0644);
46MODULE_PARM_DESC(reg_debug, "enable debug messages [URB reg]");
a6c2ba28 47
3acf2809 48#define em28xx_regdbg(fmt, arg...) do {\
4ac97914
MCC		 49 if (reg_debug) \
50 printk(KERN_INFO "%s %s :"fmt, \
d80e134d 51 dev->name, __func__ , ##arg); } while (0)
a6c2ba28 52
3acf2809 53static int alt = EM28XX_PINOUT;
a6c2ba28 54module_param(alt, int, 0644);
55MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");
56
579f72e4
AT		 57/* FIXME */
58#define em28xx_isocdbg(fmt, arg...) do {\
59 if (core_debug) \
60 printk(KERN_INFO "%s %s :"fmt, \
61 dev->name, __func__ , ##arg); } while (0)
62
a6c2ba28 63/*
3acf2809 64 * em28xx_read_reg_req()
a6c2ba28 65 * reads data from the usb device specifying bRequest
66 */
3acf2809 67int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
a6c2ba28 68 char *buf, int len)
69{
9e5d6760
MCC		 70 int ret;
71 int pipe = usb_rcvctrlpipe(dev->udev, 0);
a6c2ba28 72
9f38724a 73 if (dev->state & DEV_DISCONNECTED)
c4a98793
MCC		 74 return -ENODEV;
75
76 if (len > URB_MAX_CTRL_SIZE)
77 return -EINVAL;
9f38724a 78
9e5d6760 79 if (reg_debug) {
a1a6ee74 80 printk(KERN_DEBUG "(pipe 0x%08x): "
9e5d6760
MCC		 81 "IN: %02x %02x %02x %02x %02x %02x %02x %02x ",
82 pipe,
83 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
84 req, 0, 0,
85 reg & 0xff, reg >> 8,
86 len & 0xff, len >> 8);
87 }
a6c2ba28 88
f2a2e491 89 mutex_lock(&dev->ctrl_urb_lock);
9e5d6760 90 ret = usb_control_msg(dev->udev, pipe, req,
a6c2ba28 91 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
c4a98793
MCC		 92 0x0000, reg, dev->urb_buf, len, HZ);
93 if (ret < 0) {
94 if (reg_debug)
95 printk(" failed!\n");
f2a2e491 96 mutex_unlock(&dev->ctrl_urb_lock);
c4a98793
MCC		 97 return ret;
98 }
99
100 if (len)
101 memcpy(buf, dev->urb_buf, len);
a6c2ba28 102
f2a2e491
MCC		 103 mutex_unlock(&dev->ctrl_urb_lock);
104
6ea54d93 105 if (reg_debug) {
9e5d6760
MCC		 106 int byte;
107
108 printk("<<<");
6ea54d93 109 for (byte = 0; byte < len; byte++)
82ac4f87 110 printk(" %02x", (unsigned char)buf[byte]);
82ac4f87 111 printk("\n");
a6c2ba28 112 }
113
114 return ret;
115}
116
117/*
3acf2809 118 * em28xx_read_reg_req()
a6c2ba28 119 * reads data from the usb device specifying bRequest
120 */
3acf2809 121int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg)
a6c2ba28 122{
a6c2ba28 123 int ret;
9e5d6760 124 u8 val;
a6c2ba28 125
9e5d6760
MCC		 126 ret = em28xx_read_reg_req_len(dev, req, reg, &val, 1);
127 if (ret < 0)
c4a98793 128 return ret;
a6c2ba28 129
130 return val;
131}
132
3acf2809 133int em28xx_read_reg(struct em28xx *dev, u16 reg)
a6c2ba28 134{
3acf2809 135 return em28xx_read_reg_req(dev, USB_REQ_GET_STATUS, reg);
a6c2ba28 136}
137
138/*
3acf2809 139 * em28xx_write_regs_req()
a6c2ba28 140 * sends data to the usb device, specifying bRequest
141 */
3acf2809 142int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
a6c2ba28 143 int len)
144{
145 int ret;
9e5d6760 146 int pipe = usb_sndctrlpipe(dev->udev, 0);
a6c2ba28 147
9f38724a 148 if (dev->state & DEV_DISCONNECTED)
c67ec53f
MCC		 149 return -ENODEV;
150
c4a98793 151 if ((len < 1) || (len > URB_MAX_CTRL_SIZE))
c67ec53f 152 return -EINVAL;
9f38724a 153
a6c2ba28 154 if (reg_debug) {
9e5d6760
MCC		 155 int byte;
156
a1a6ee74 157 printk(KERN_DEBUG "(pipe 0x%08x): "
9e5d6760
MCC		 158 "OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>>",
159 pipe,
160 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
161 req, 0, 0,
162 reg & 0xff, reg >> 8,
163 len & 0xff, len >> 8);
164
165 for (byte = 0; byte < len; byte++)
166 printk(" %02x", (unsigned char)buf[byte]);
82ac4f87 167 printk("\n");
a6c2ba28 168 }
169
f2a2e491 170 mutex_lock(&dev->ctrl_urb_lock);
c4a98793 171 memcpy(dev->urb_buf, buf, len);
9e5d6760 172 ret = usb_control_msg(dev->udev, pipe, req,
a6c2ba28 173 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
c4a98793 174 0x0000, reg, dev->urb_buf, len, HZ);
f2a2e491 175 mutex_unlock(&dev->ctrl_urb_lock);
c4a98793 176
89b329ef
MCC		 177 if (dev->wait_after_write)
178 msleep(dev->wait_after_write);
179
a6c2ba28 180 return ret;
181}
182
3acf2809 183int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len)
a6c2ba28 184{
c67ec53f
MCC		 185 int rc;
186
187 rc = em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len);
188
189 /* Stores GPO/GPIO values at the cache, if changed
190 Only write values should be stored, since input on a GPIO
191 register will return the input bits.
192 Not sure what happens on reading GPO register.
193 */
194 if (rc >= 0) {
6a1acc3b 195 if (reg == dev->reg_gpo_num)
c67ec53f 196 dev->reg_gpo = buf[0];
6a1acc3b 197 else if (reg == dev->reg_gpio_num)
c67ec53f
MCC		 198 dev->reg_gpio = buf[0];
199 }
200
201 return rc;
a6c2ba28 202}
203
b6972489
DH		 204/* Write a single register */
205int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val)
206{
207 return em28xx_write_regs(dev, reg, &val, 1);
208}
209
a6c2ba28 210/*
3acf2809 211 * em28xx_write_reg_bits()
a6c2ba28 212 * sets only some bits (specified by bitmask) of a register, by first reading
213 * the actual value
214 */
532fe652 215static int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val,
a6c2ba28 216 u8 bitmask)
217{
218 int oldval;
219 u8 newval;
6ea54d93 220
c67ec53f 221 /* Uses cache for gpo/gpio registers */
6a1acc3b 222 if (reg == dev->reg_gpo_num)
c67ec53f 223 oldval = dev->reg_gpo;
6a1acc3b 224 else if (reg == dev->reg_gpio_num)
c67ec53f
MCC		 225 oldval = dev->reg_gpio;
226 else
227 oldval = em28xx_read_reg(dev, reg);
6ea54d93
DSL		 228
229 if (oldval < 0)
a6c2ba28 230 return oldval;
6ea54d93 231
a6c2ba28 232 newval = (((u8) oldval) & ~bitmask) | (val & bitmask);
c67ec53f 233
3acf2809 234 return em28xx_write_regs(dev, reg, &newval, 1);
a6c2ba28 235}
236
35643943
MCC		 237/*
238 * em28xx_is_ac97_ready()
239 * Checks if ac97 is ready
240 */
241static int em28xx_is_ac97_ready(struct em28xx *dev)
242{
243 int ret, i;
244
245 /* Wait up to 50 ms for AC97 command to complete */
246 for (i = 0; i < 10; i++, msleep(5)) {
247 ret = em28xx_read_reg(dev, EM28XX_R43_AC97BUSY);
248 if (ret < 0)
249 return ret;
250
251 if (!(ret & 0x01))
252 return 0;
253 }
254
255 em28xx_warn("AC97 command still being executed: not handled properly!\n");
256 return -EBUSY;
257}
258
259/*
260 * em28xx_read_ac97()
261 * write a 16 bit value to the specified AC97 address (LSB first!)
262 */
531c98e7 263int em28xx_read_ac97(struct em28xx *dev, u8 reg)
35643943
MCC		 264{
265 int ret;
266 u8 addr = (reg & 0x7f) | 0x80;
267 u16 val;
268
269 ret = em28xx_is_ac97_ready(dev);
270 if (ret < 0)
271 return ret;
272
273 ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
274 if (ret < 0)
275 return ret;
276
277 ret = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R40_AC97LSB,
278 (u8 *)&val, sizeof(val));
279
280 if (ret < 0)
281 return ret;
282 return le16_to_cpu(val);
283}
284
a6c2ba28 285/*
3acf2809 286 * em28xx_write_ac97()
a6c2ba28 287 * write a 16 bit value to the specified AC97 address (LSB first!)
288 */
531c98e7 289int em28xx_write_ac97(struct em28xx *dev, u8 reg, u16 val)
a6c2ba28 290{
35643943 291 int ret;
a6c2ba28 292 u8 addr = reg & 0x7f;
35643943
MCC		 293 __le16 value;
294
295 value = cpu_to_le16(val);
296
297 ret = em28xx_is_ac97_ready(dev);
298 if (ret < 0)
299 return ret;
6ea54d93 300
35643943 301 ret = em28xx_write_regs(dev, EM28XX_R40_AC97LSB, (u8 *) &value, 2);
6ea54d93 302 if (ret < 0)
a6c2ba28 303 return ret;
6ea54d93 304
41facaa4 305 ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
6ea54d93 306 if (ret < 0)
a6c2ba28 307 return ret;
00b8730f 308
35643943
MCC		 309 return 0;
310}
6ea54d93 311
e879b8eb
MCC		 312struct em28xx_vol_table {
313 enum em28xx_amux mux;
5faff789
MCC		 314 u8 reg;
315};
316
e879b8eb 317static struct em28xx_vol_table inputs[] = {
5faff789
MCC		 318 { EM28XX_AMUX_VIDEO, AC97_VIDEO_VOL },
319 { EM28XX_AMUX_LINE_IN, AC97_LINEIN_VOL },
320 { EM28XX_AMUX_PHONE, AC97_PHONE_VOL },
321 { EM28XX_AMUX_MIC, AC97_MIC_VOL },
322 { EM28XX_AMUX_CD, AC97_CD_VOL },
323 { EM28XX_AMUX_AUX, AC97_AUX_VOL },
324 { EM28XX_AMUX_PCM_OUT, AC97_PCM_OUT_VOL },
325};
326
327static int set_ac97_input(struct em28xx *dev)
35643943 328{
5faff789
MCC		 329 int ret, i;
330 enum em28xx_amux amux = dev->ctl_ainput;
35643943 331
5faff789
MCC		 332 /* EM28XX_AMUX_VIDEO2 is a special case used to indicate that
333 em28xx should point to LINE IN, while AC97 should use VIDEO
334 */
335 if (amux == EM28XX_AMUX_VIDEO2)
f1990a9c 336 amux = EM28XX_AMUX_VIDEO;
35643943 337
5faff789
MCC		 338 /* Mute all entres but the one that were selected */
339 for (i = 0; i < ARRAY_SIZE(inputs); i++) {
e879b8eb 340 if (amux == inputs[i].mux)
5faff789
MCC		 341 ret = em28xx_write_ac97(dev, inputs[i].reg, 0x0808);
342 else
343 ret = em28xx_write_ac97(dev, inputs[i].reg, 0x8000);
35643943 344
5faff789
MCC		 345 if (ret < 0)
346 em28xx_warn("couldn't setup AC97 register %d\n",
347 inputs[i].reg);
348 }
349 return 0;
a6c2ba28 350}
351
00b8730f 352static int em28xx_set_audio_source(struct em28xx *dev)
539c96d0 353{
1685a6fe 354 int ret;
539c96d0
MCC		 355 u8 input;
356
505b6d0b 357 if (dev->board.is_em2800) {
5faff789 358 if (dev->ctl_ainput == EM28XX_AMUX_VIDEO)
539c96d0 359 input = EM2800_AUDIO_SRC_TUNER;
5faff789
MCC		 360 else
361 input = EM2800_AUDIO_SRC_LINE;
539c96d0 362
41facaa4 363 ret = em28xx_write_regs(dev, EM2800_R08_AUDIOSRC, &input, 1);
539c96d0
MCC		 364 if (ret < 0)
365 return ret;
366 }
367
505b6d0b 368 if (dev->board.has_msp34xx)
539c96d0
MCC		 369 input = EM28XX_AUDIO_SRC_TUNER;
370 else {
371 switch (dev->ctl_ainput) {
372 case EM28XX_AMUX_VIDEO:
373 input = EM28XX_AUDIO_SRC_TUNER;
539c96d0 374 break;
35643943 375 default:
539c96d0 376 input = EM28XX_AUDIO_SRC_LINE;
539c96d0
MCC		 377 break;
378 }
379 }
380
41facaa4 381 ret = em28xx_write_reg_bits(dev, EM28XX_R0E_AUDIOSRC, input, 0xc0);
539c96d0
MCC		 382 if (ret < 0)
383 return ret;
00b8730f 384 msleep(5);
539c96d0 385
35643943
MCC		 386 switch (dev->audio_mode.ac97) {
387 case EM28XX_NO_AC97:
388 break;
5faff789
MCC		 389 default:
390 ret = set_ac97_input(dev);
35643943 391 }
539c96d0 392
5faff789 393 return ret;
539c96d0
MCC		 394}
395
26cdc76b 396static const struct em28xx_vol_table outputs[] = {
e879b8eb
MCC		 397 { EM28XX_AOUT_MASTER, AC97_MASTER_VOL },
398 { EM28XX_AOUT_LINE, AC97_LINE_LEVEL_VOL },
399 { EM28XX_AOUT_MONO, AC97_MASTER_MONO_VOL },
400 { EM28XX_AOUT_LFE, AC97_LFE_MASTER_VOL },
401 { EM28XX_AOUT_SURR, AC97_SURR_MASTER_VOL },
35ae6f04
MCC		 402};
403
3acf2809 404int em28xx_audio_analog_set(struct em28xx *dev)
a6c2ba28 405{
35ae6f04 406 int ret, i;
a2070c66 407 u8 xclk;
539c96d0 408
35643943
MCC		 409 if (!dev->audio_mode.has_audio)
410 return 0;
539c96d0 411
5faff789
MCC		 412 /* It is assumed that all devices use master volume for output.
413 It would be possible to use also line output.
414 */
35643943 415 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
35ae6f04
MCC		 416 /* Mute all outputs */
417 for (i = 0; i < ARRAY_SIZE(outputs); i++) {
e879b8eb 418 ret = em28xx_write_ac97(dev, outputs[i].reg, 0x8000);
35ae6f04
MCC		 419 if (ret < 0)
420 em28xx_warn("couldn't setup AC97 register %d\n",
e879b8eb 421 outputs[i].reg);
35ae6f04 422 }
35643943 423 }
539c96d0 424
505b6d0b 425 xclk = dev->board.xclk & 0x7f;
3abee53e 426 if (!dev->mute)
8ed06fd4 427 xclk |= EM28XX_XCLK_AUDIO_UNMUTE;
3abee53e 428
a2070c66 429 ret = em28xx_write_reg(dev, EM28XX_R0F_XCLK, xclk);
539c96d0
MCC		 430 if (ret < 0)
431 return ret;
3abee53e 432 msleep(10);
539c96d0
MCC		 433
434 /* Selects the proper audio input */
435 ret = em28xx_set_audio_source(dev);
a6c2ba28 436
35643943
MCC		 437 /* Sets volume */
438 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
439 int vol;
440
7e4b15e4
RK		 441 em28xx_write_ac97(dev, AC97_POWER_DOWN_CTRL, 0x4200);
442 em28xx_write_ac97(dev, AC97_EXT_AUD_CTRL, 0x0031);
443 em28xx_write_ac97(dev, AC97_PCM_IN_SRATE, 0xbb80);
444
35643943
MCC		 445 /* LSB: left channel - both channels with the same level */
446 vol = (0x1f - dev->volume) | ((0x1f - dev->volume) << 8);
447
448 /* Mute device, if needed */
449 if (dev->mute)
450 vol |= 0x8000;
451
452 /* Sets volume */
e879b8eb
MCC		 453 for (i = 0; i < ARRAY_SIZE(outputs); i++) {
454 if (dev->ctl_aoutput & outputs[i].mux)
455 ret = em28xx_write_ac97(dev, outputs[i].reg,
456 vol);
457 if (ret < 0)
458 em28xx_warn("couldn't setup AC97 register %d\n",
459 outputs[i].reg);
460 }
8866f9cf
MCC		 461
462 if (dev->ctl_aoutput & EM28XX_AOUT_PCM_IN) {
463 int sel = ac97_return_record_select(dev->ctl_aoutput);
464
a1a6ee74
NS		 465 /* Use the same input for both left and right
466 channels */
8866f9cf
MCC		 467 sel |= (sel << 8);
468
469 em28xx_write_ac97(dev, AC97_RECORD_SELECT, sel);
470 }
35643943 471 }
00b8730f 472
539c96d0
MCC		 473 return ret;
474}
475EXPORT_SYMBOL_GPL(em28xx_audio_analog_set);
a6c2ba28 476
35643943
MCC		 477int em28xx_audio_setup(struct em28xx *dev)
478{
479 int vid1, vid2, feat, cfg;
16c7bcad 480 u32 vid;
35643943 481
62f3e69b 482 if (dev->chip_id == CHIP_ID_EM2870 || dev->chip_id == CHIP_ID_EM2874) {
35643943
MCC		 483 /* Digital only device - don't load any alsa module */
484 dev->audio_mode.has_audio = 0;
485 dev->has_audio_class = 0;
486 dev->has_alsa_audio = 0;
487 return 0;
488 }
489
490 /* If device doesn't support Usb Audio Class, use vendor class */
491 if (!dev->has_audio_class)
492 dev->has_alsa_audio = 1;
493
494 dev->audio_mode.has_audio = 1;
495
496 /* See how this device is configured */
497 cfg = em28xx_read_reg(dev, EM28XX_R00_CHIPCFG);
498 if (cfg < 0)
499 cfg = EM28XX_CHIPCFG_AC97; /* Be conservative */
500 else
501 em28xx_info("Config register raw data: 0x%02x\n", cfg);
502
503 if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
504 EM28XX_CHIPCFG_I2S_3_SAMPRATES) {
505 em28xx_info("I2S Audio (3 sample rates)\n");
506 dev->audio_mode.i2s_3rates = 1;
507 }
508 if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
509 EM28XX_CHIPCFG_I2S_5_SAMPRATES) {
510 em28xx_info("I2S Audio (5 sample rates)\n");
511 dev->audio_mode.i2s_5rates = 1;
512 }
513
de84830e
DH		 514 if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) != EM28XX_CHIPCFG_AC97) {
515 /* Skip the code that does AC97 vendor detection */
35643943
MCC		 516 dev->audio_mode.ac97 = EM28XX_NO_AC97;
517 goto init_audio;
518 }
519
520 dev->audio_mode.ac97 = EM28XX_AC97_OTHER;
521
522 vid1 = em28xx_read_ac97(dev, AC97_VENDOR_ID1);
523 if (vid1 < 0) {
524 /* Device likely doesn't support AC97 */
525 em28xx_warn("AC97 chip type couldn't be determined\n");
526 goto init_audio;
527 }
528
529 vid2 = em28xx_read_ac97(dev, AC97_VENDOR_ID2);
530 if (vid2 < 0)
531 goto init_audio;
532
16c7bcad
MCC		 533 vid = vid1 << 16 | vid2;
534
535 dev->audio_mode.ac97_vendor_id = vid;
536 em28xx_warn("AC97 vendor ID = 0x%08x\n", vid);
35643943
MCC		 537
538 feat = em28xx_read_ac97(dev, AC97_RESET);
539 if (feat < 0)
540 goto init_audio;
541
542 dev->audio_mode.ac97_feat = feat;
543 em28xx_warn("AC97 features = 0x%04x\n", feat);
544
16c7bcad
MCC		 545 /* Try to identify what audio processor we have */
546 if ((vid == 0xffffffff) && (feat == 0x6a90))
35643943 547 dev->audio_mode.ac97 = EM28XX_AC97_EM202;
209acc02
MCC		 548 else if ((vid >> 8) == 0x838476)
549 dev->audio_mode.ac97 = EM28XX_AC97_SIGMATEL;
35643943
MCC		 550
551init_audio:
552 /* Reports detected AC97 processor */
553 switch (dev->audio_mode.ac97) {
554 case EM28XX_NO_AC97:
555 em28xx_info("No AC97 audio processor\n");
556 break;
557 case EM28XX_AC97_EM202:
558 em28xx_info("Empia 202 AC97 audio processor detected\n");
559 break;
209acc02
MCC		 560 case EM28XX_AC97_SIGMATEL:
561 em28xx_info("Sigmatel audio processor detected(stac 97%02x)\n",
562 dev->audio_mode.ac97_vendor_id & 0xff);
563 break;
35643943
MCC		 564 case EM28XX_AC97_OTHER:
565 em28xx_warn("Unknown AC97 audio processor detected!\n");
566 break;
567 default:
568 break;
569 }
570
571 return em28xx_audio_analog_set(dev);
572}
573EXPORT_SYMBOL_GPL(em28xx_audio_setup);
574
3acf2809 575int em28xx_colorlevels_set_default(struct em28xx *dev)
a6c2ba28 576{
2a29a0d7
MCC		 577 em28xx_write_reg(dev, EM28XX_R20_YGAIN, 0x10); /* contrast */
578 em28xx_write_reg(dev, EM28XX_R21_YOFFSET, 0x00); /* brightness */
579 em28xx_write_reg(dev, EM28XX_R22_UVGAIN, 0x10); /* saturation */
580 em28xx_write_reg(dev, EM28XX_R23_UOFFSET, 0x00);
581 em28xx_write_reg(dev, EM28XX_R24_VOFFSET, 0x00);
582 em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, 0x00);
583
584 em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20);
585 em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20);
586 em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20);
587 em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20);
588 em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00);
589 em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00);
590 return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00);
a6c2ba28 591}
592
3acf2809 593int em28xx_capture_start(struct em28xx *dev, int start)
a6c2ba28 594{
ee6e3a86 595 int rc;
ebef13d4
DH		 596
597 if (dev->chip_id == CHIP_ID_EM2874) {
598 /* The Transport Stream Enable Register moved in em2874 */
599 if (!start) {
600 rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE,
601 0x00,
602 EM2874_TS1_CAPTURE_ENABLE);
603 return rc;
604 }
605
606 /* Enable Transport Stream */
607 rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE,
608 EM2874_TS1_CAPTURE_ENABLE,
609 EM2874_TS1_CAPTURE_ENABLE);
610 return rc;
611 }
612
613
a6c2ba28 614 /* FIXME: which is the best order? */
615 /* video registers are sampled by VREF */
41facaa4 616 rc = em28xx_write_reg_bits(dev, EM28XX_R0C_USBSUSP,
ee6e3a86
MCC		 617 start ? 0x10 : 0x00, 0x10);
618 if (rc < 0)
619 return rc;
620
621 if (!start) {
622 /* disable video capture */
2a29a0d7 623 rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x27);
102a0b08 624 return rc;
ee6e3a86
MCC		 625 }
626
a6c2ba28 627 /* enable video capture */
2a29a0d7 628 rc = em28xx_write_reg(dev, 0x48, 0x00);
102a0b08 629
ee6e3a86 630 if (dev->mode == EM28XX_ANALOG_MODE)
2a29a0d7 631 rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67);
ee6e3a86 632 else
2a29a0d7 633 rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37);
ee6e3a86 634
6ea54d93 635 msleep(6);
ee6e3a86
MCC		 636
637 return rc;
a6c2ba28 638}
639
bddcf633 640int em28xx_set_outfmt(struct em28xx *dev)
a6c2ba28 641{
bddcf633
MCC		 642 int ret;
643
644 ret = em28xx_write_reg_bits(dev, EM28XX_R27_OUTFMT,
645 dev->format->reg | 0x20, 0x3f);
646 if (ret < 0)
647 return ret;
648
649 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, 0x10);
650 if (ret < 0)
651 return ret;
652
2a29a0d7 653 return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, 0x11);
a6c2ba28 654}
655
adcb0fa2
AB		 656static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax,
657 u8 ymin, u8 ymax)
a6c2ba28 658{
6ea54d93
DSL		 659 em28xx_coredbg("em28xx Scale: (%d,%d)-(%d,%d)\n",
660 xmin, ymin, xmax, ymax);
a6c2ba28 661
41facaa4
MCC		 662 em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1);
663 em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1);
664 em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1);
665 return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1);
a6c2ba28 666}
667
adcb0fa2 668static int em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart,
a6c2ba28 669 u16 width, u16 height)
670{
671 u8 cwidth = width;
672 u8 cheight = height;
673 u8 overflow = (height >> 7 & 0x02) | (width >> 8 & 0x01);
674
6ea54d93
DSL		 675 em28xx_coredbg("em28xx Area Set: (%d,%d)\n",
676 (width | (overflow & 2) << 7),
a6c2ba28 677 (height | (overflow & 1) << 8));
678
41facaa4
MCC		 679 em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1);
680 em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1);
681 em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1);
682 em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1);
683 return em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1);
a6c2ba28 684}
685
adcb0fa2 686static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v)
a6c2ba28 687{
52c02fcd
SS		 688 u8 mode;
689 /* the em2800 scaler only supports scaling down to 50% */
505b6d0b 690 if (dev->board.is_em2800)
52c02fcd
SS		 691 mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00);
692 else {
693 u8 buf[2];
694 buf[0] = h;
695 buf[1] = h >> 8;
41facaa4 696 em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2);
52c02fcd
SS		 697 buf[0] = v;
698 buf[1] = v >> 8;
41facaa4 699 em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2);
6ea54d93
DSL		 700 /* it seems that both H and V scalers must be active
701 to work correctly */
a1a6ee74 702 mode = (h || v) ? 0x30 : 0x00;
74458e6c 703 }
41facaa4 704 return em28xx_write_reg_bits(dev, EM28XX_R26_COMPR, mode, 0x30);
a6c2ba28 705}
706
707/* FIXME: this only function read values from dev */
3acf2809 708int em28xx_resolution_set(struct em28xx *dev)
a6c2ba28 709{
710 int width, height;
711 width = norm_maxw(dev);
712 height = norm_maxh(dev) >> 1;
713
bddcf633 714 em28xx_set_outfmt(dev);
3acf2809
MCC		 715 em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2);
716 em28xx_capture_area_set(dev, 0, 0, width >> 2, height >> 2);
717 return em28xx_scaler_set(dev, dev->hscale, dev->vscale);
a6c2ba28 718}
719
3acf2809 720int em28xx_set_alternate(struct em28xx *dev)
a6c2ba28 721{
722 int errCode, prev_alt = dev->alt;
3687e1e6 723 int i;
44dc733c 724 unsigned int min_pkt_size = dev->width * 2 + 4;
3687e1e6 725
2c4a07b2 726 /* When image size is bigger than a certain value,
3687e1e6
MCC		 727 the frame size should be increased, otherwise, only
728 green screen will be received.
729 */
44dc733c 730 if (dev->width * 2 * dev->height > 720 * 240 * 2)
3687e1e6
MCC		 731 min_pkt_size *= 2;
732
2c4a07b2
SS		 733 for (i = 0; i < dev->num_alt; i++) {
734 /* stop when the selected alt setting offers enough bandwidth */
735 if (dev->alt_max_pkt_size[i] >= min_pkt_size) {
736 dev->alt = i;
3687e1e6 737 break;
2c4a07b2
SS		 738 /* otherwise make sure that we end up with the maximum bandwidth
739 because the min_pkt_size equation might be wrong...
740 */
741 } else if (dev->alt_max_pkt_size[i] >
742 dev->alt_max_pkt_size[dev->alt])
743 dev->alt = i;
744 }
a6c2ba28 745
746 if (dev->alt != prev_alt) {
3687e1e6
MCC		 747 em28xx_coredbg("minimum isoc packet size: %u (alt=%d)\n",
748 min_pkt_size, dev->alt);
a6c2ba28 749 dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt];
3687e1e6
MCC		 750 em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n",
751 dev->alt, dev->max_pkt_size);
a6c2ba28 752 errCode = usb_set_interface(dev->udev, 0, dev->alt);
753 if (errCode < 0) {
6ea54d93 754 em28xx_errdev("cannot change alternate number to %d (error=%i)\n",
3687e1e6 755 dev->alt, errCode);
a6c2ba28 756 return errCode;
757 }
758 }
759 return 0;
760}
579f72e4 761
c67ec53f
MCC		 762int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio)
763{
764 int rc = 0;
765
766 if (!gpio)
767 return rc;
768
2fe3e2ee
MCC		 769 if (dev->mode != EM28XX_SUSPEND) {
770 em28xx_write_reg(dev, 0x48, 0x00);
771 if (dev->mode == EM28XX_ANALOG_MODE)
772 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67);
773 else
774 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37);
775 msleep(6);
776 }
c67ec53f
MCC		 777
778 /* Send GPIO reset sequences specified at board entry */
779 while (gpio->sleep >= 0) {
780 if (gpio->reg >= 0) {
781 rc = em28xx_write_reg_bits(dev,
782 gpio->reg,
783 gpio->val,
784 gpio->mask);
785 if (rc < 0)
786 return rc;
787 }
788 if (gpio->sleep > 0)
789 msleep(gpio->sleep);
790
791 gpio++;
792 }
793 return rc;
794}
795
796int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode)
797{
798 if (dev->mode == set_mode)
799 return 0;
800
2fe3e2ee 801 if (set_mode == EM28XX_SUSPEND) {
c67ec53f 802 dev->mode = set_mode;
2fe3e2ee
MCC		 803
804 /* FIXME: add suspend support for ac97 */
805
806 return em28xx_gpio_set(dev, dev->board.suspend_gpio);
c67ec53f
MCC		 807 }
808
809 dev->mode = set_mode;
810
811 if (dev->mode == EM28XX_DIGITAL_MODE)
f502e861 812 return em28xx_gpio_set(dev, dev->board.dvb_gpio);
c67ec53f 813 else
f502e861 814 return em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
c67ec53f
MCC		 815}
816EXPORT_SYMBOL_GPL(em28xx_set_mode);
817
579f72e4
AT		 818/* ------------------------------------------------------------------
819 URB control
820 ------------------------------------------------------------------*/
821
822/*
823 * IRQ callback, called by URB callback
824 */
825static void em28xx_irq_callback(struct urb *urb)
826{
827 struct em28xx_dmaqueue *dma_q = urb->context;
828 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
829 int rc, i;
830
aa5a1821
RK		 831 switch (urb->status) {
832 case 0: /* success */
833 case -ETIMEDOUT: /* NAK */
834 break;
835 case -ECONNRESET: /* kill */
836 case -ENOENT:
837 case -ESHUTDOWN:
838 return;
839 default: /* error */
840 em28xx_isocdbg("urb completition error %d.\n", urb->status);
841 break;
842 }
843
579f72e4
AT		 844 /* Copy data from URB */
845 spin_lock(&dev->slock);
846 rc = dev->isoc_ctl.isoc_copy(dev, urb);
847 spin_unlock(&dev->slock);
848
849 /* Reset urb buffers */
850 for (i = 0; i < urb->number_of_packets; i++) {
851 urb->iso_frame_desc[i].status = 0;
852 urb->iso_frame_desc[i].actual_length = 0;
853 }
854 urb->status = 0;
855
856 urb->status = usb_submit_urb(urb, GFP_ATOMIC);
857 if (urb->status) {
4269a8ee
DH		 858 em28xx_isocdbg("urb resubmit failed (error=%i)\n",
859 urb->status);
579f72e4
AT		 860 }
861}
862
863/*
864 * Stop and Deallocate URBs
865 */
866void em28xx_uninit_isoc(struct em28xx *dev)
867{
868 struct urb *urb;
869 int i;
870
871 em28xx_isocdbg("em28xx: called em28xx_uninit_isoc\n");
872
873 dev->isoc_ctl.nfields = -1;
874 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
875 urb = dev->isoc_ctl.urb[i];
876 if (urb) {
9c06210b
RK		 877 if (!irqs_disabled())
878 usb_kill_urb(urb);
879 else
880 usb_unlink_urb(urb);
881
579f72e4
AT		 882 if (dev->isoc_ctl.transfer_buffer[i]) {
883 usb_buffer_free(dev->udev,
6ea54d93
DSL		 884 urb->transfer_buffer_length,
885 dev->isoc_ctl.transfer_buffer[i],
886 urb->transfer_dma);
579f72e4
AT		 887 }
888 usb_free_urb(urb);
889 dev->isoc_ctl.urb[i] = NULL;
890 }
891 dev->isoc_ctl.transfer_buffer[i] = NULL;
892 }
893
894 kfree(dev->isoc_ctl.urb);
895 kfree(dev->isoc_ctl.transfer_buffer);
896
897 dev->isoc_ctl.urb = NULL;
898 dev->isoc_ctl.transfer_buffer = NULL;
899 dev->isoc_ctl.num_bufs = 0;
900
901 em28xx_capture_start(dev, 0);
902}
903EXPORT_SYMBOL_GPL(em28xx_uninit_isoc);
904
905/*
906 * Allocate URBs and start IRQ
907 */
908int em28xx_init_isoc(struct em28xx *dev, int max_packets,
909 int num_bufs, int max_pkt_size,
c67ec53f 910 int (*isoc_copy) (struct em28xx *dev, struct urb *urb))
579f72e4
AT		 911{
912 struct em28xx_dmaqueue *dma_q = &dev->vidq;
913 int i;
914 int sb_size, pipe;
915 struct urb *urb;
916 int j, k;
917 int rc;
918
919 em28xx_isocdbg("em28xx: called em28xx_prepare_isoc\n");
920
921 /* De-allocates all pending stuff */
922 em28xx_uninit_isoc(dev);
923
924 dev->isoc_ctl.isoc_copy = isoc_copy;
925 dev->isoc_ctl.num_bufs = num_bufs;
926
927 dev->isoc_ctl.urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
928 if (!dev->isoc_ctl.urb) {
929 em28xx_errdev("cannot alloc memory for usb buffers\n");
930 return -ENOMEM;
931 }
932
933 dev->isoc_ctl.transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
934 GFP_KERNEL);
094f9b4b 935 if (!dev->isoc_ctl.transfer_buffer) {
579f72e4
AT		 936 em28xx_errdev("cannot allocate memory for usbtransfer\n");
937 kfree(dev->isoc_ctl.urb);
938 return -ENOMEM;
939 }
940
941 dev->isoc_ctl.max_pkt_size = max_pkt_size;
942 dev->isoc_ctl.buf = NULL;
943
944 sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
945
946 /* allocate urbs and transfer buffers */
947 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
948 urb = usb_alloc_urb(max_packets, GFP_KERNEL);
949 if (!urb) {
950 em28xx_err("cannot alloc isoc_ctl.urb %i\n", i);
951 em28xx_uninit_isoc(dev);
952 return -ENOMEM;
953 }
954 dev->isoc_ctl.urb[i] = urb;
955
956 dev->isoc_ctl.transfer_buffer[i] = usb_buffer_alloc(dev->udev,
957 sb_size, GFP_KERNEL, &urb->transfer_dma);
958 if (!dev->isoc_ctl.transfer_buffer[i]) {
959 em28xx_err("unable to allocate %i bytes for transfer"
960 " buffer %i%s\n",
961 sb_size, i,
a1a6ee74 962 in_interrupt() ? " while in int" : "");
579f72e4
AT		 963 em28xx_uninit_isoc(dev);
964 return -ENOMEM;
965 }
966 memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
967
968 /* FIXME: this is a hack - should be
969 'desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK'
970 should also be using 'desc.bInterval'
971 */
6ea54d93 972 pipe = usb_rcvisocpipe(dev->udev,
c67ec53f 973 dev->mode == EM28XX_ANALOG_MODE ? 0x82 : 0x84);
6ea54d93 974
579f72e4
AT		 975 usb_fill_int_urb(urb, dev->udev, pipe,
976 dev->isoc_ctl.transfer_buffer[i], sb_size,
977 em28xx_irq_callback, dma_q, 1);
978
979 urb->number_of_packets = max_packets;
980 urb->transfer_flags = URB_ISO_ASAP;
981
982 k = 0;
983 for (j = 0; j < max_packets; j++) {
984 urb->iso_frame_desc[j].offset = k;
985 urb->iso_frame_desc[j].length =
986 dev->isoc_ctl.max_pkt_size;
987 k += dev->isoc_ctl.max_pkt_size;
988 }
989 }
990
991 init_waitqueue_head(&dma_q->wq);
992
c67ec53f 993 em28xx_capture_start(dev, 1);
579f72e4
AT		 994
995 /* submit urbs and enables IRQ */
996 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
997 rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
998 if (rc) {
999 em28xx_err("submit of urb %i failed (error=%i)\n", i,
1000 rc);
1001 em28xx_uninit_isoc(dev);
1002 return rc;
1003 }
1004 }
1005
1006 return 0;
1007}
1008EXPORT_SYMBOL_GPL(em28xx_init_isoc);
1a23f81b
MCC		 1009
1010/*
1011 * em28xx_wake_i2c()
1012 * configure i2c attached devices
1013 */
1014void em28xx_wake_i2c(struct em28xx *dev)
1015{
1016 struct v4l2_routing route;
1017 int zero = 0;
1018
1019 route.input = INPUT(dev->ctl_input)->vmux;
1020 route.output = 0;
1021 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, &zero);
1022 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
1023 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
1024}
1025
1026/*
1027 * Device control list
1028 */
1029
1030static LIST_HEAD(em28xx_devlist);
1031static DEFINE_MUTEX(em28xx_devlist_mutex);
1032
bec43661 1033struct em28xx *em28xx_get_device(int minor,
1a23f81b
MCC		 1034 enum v4l2_buf_type *fh_type,
1035 int *has_radio)
1036{
1037 struct em28xx *h, *dev = NULL;
1a23f81b
MCC		 1038
1039 *fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1040 *has_radio = 0;
1041
1042 mutex_lock(&em28xx_devlist_mutex);
1043 list_for_each_entry(h, &em28xx_devlist, devlist) {
1044 if (h->vdev->minor == minor)
1045 dev = h;
1046 if (h->vbi_dev->minor == minor) {
1047 dev = h;
1048 *fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1049 }
1050 if (h->radio_dev &&
1051 h->radio_dev->minor == minor) {
1052 dev = h;
1053 *has_radio = 1;
1054 }
1055 }
1056 mutex_unlock(&em28xx_devlist_mutex);
1057
1058 return dev;
1059}
1060
1061/*
1062 * em28xx_realease_resources()
1063 * unregisters the v4l2,i2c and usb devices
1064 * called when the device gets disconected or at module unload
1065*/
1066void em28xx_remove_from_devlist(struct em28xx *dev)
1067{
1068 mutex_lock(&em28xx_devlist_mutex);
1069 list_del(&dev->devlist);
1070 mutex_unlock(&em28xx_devlist_mutex);
1071};
1072
1073void em28xx_add_into_devlist(struct em28xx *dev)
1074{
1075 mutex_lock(&em28xx_devlist_mutex);
1076 list_add_tail(&dev->devlist, &em28xx_devlist);
1077 mutex_unlock(&em28xx_devlist_mutex);
1078};
1079
1080/*
1081 * Extension interface
1082 */
1083
1084static LIST_HEAD(em28xx_extension_devlist);
1085static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1086
1087int em28xx_register_extension(struct em28xx_ops *ops)
1088{
1089 struct em28xx *dev = NULL;
1090
1091 mutex_lock(&em28xx_devlist_mutex);
1092 mutex_lock(&em28xx_extension_devlist_lock);
1093 list_add_tail(&ops->next, &em28xx_extension_devlist);
1094 list_for_each_entry(dev, &em28xx_devlist, devlist) {
1095 if (dev)
1096 ops->init(dev);
1097 }
1098 printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1099 mutex_unlock(&em28xx_extension_devlist_lock);
1100 mutex_unlock(&em28xx_devlist_mutex);
1101 return 0;
1102}
1103EXPORT_SYMBOL(em28xx_register_extension);
1104
1105void em28xx_unregister_extension(struct em28xx_ops *ops)
1106{
1107 struct em28xx *dev = NULL;
1108
1109 mutex_lock(&em28xx_devlist_mutex);
1110 list_for_each_entry(dev, &em28xx_devlist, devlist) {
1111 if (dev)
1112 ops->fini(dev);
1113 }
1114
1115 mutex_lock(&em28xx_extension_devlist_lock);
1116 printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1117 list_del(&ops->next);
1118 mutex_unlock(&em28xx_extension_devlist_lock);
1119 mutex_unlock(&em28xx_devlist_mutex);
1120}
1121EXPORT_SYMBOL(em28xx_unregister_extension);
1122
1123void em28xx_init_extension(struct em28xx *dev)
1124{
1125 struct em28xx_ops *ops = NULL;
1126
1127 mutex_lock(&em28xx_extension_devlist_lock);
1128 if (!list_empty(&em28xx_extension_devlist)) {
1129 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1130 if (ops->init)
1131 ops->init(dev);
1132 }
1133 }
1134 mutex_unlock(&em28xx_extension_devlist_lock);
1135}
1136
1137void em28xx_close_extension(struct em28xx *dev)
1138{
1139 struct em28xx_ops *ops = NULL;
1140
1141 mutex_lock(&em28xx_extension_devlist_lock);
1142 if (!list_empty(&em28xx_extension_devlist)) {
1143 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1144 if (ops->fini)
1145 ops->fini(dev);
1146 }
1147 }
1148 mutex_unlock(&em28xx_extension_devlist_lock);
1149}
Linux kernel - Deliverables
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