?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
USB: rename usb_buffer_alloc() and usb_buffer_free() users
[linux-2.6.git] / drivers / media / video / em28xx / em28xx-core.c
blobd4a95546504d79a50879ccf9a3a09d07695c0466
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
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>
27 #include <linux/slab.h>
28 #include <linux/usb.h>
29 #include <linux/vmalloc.h>
30 #include <media/v4l2-common.h>
31
32 #include "em28xx.h"
33
34 /* #define ENABLE_DEBUG_ISOC_FRAMES */
35
36 static unsigned int core_debug;
37 module_param(core_debug, int, 0644);
38 MODULE_PARM_DESC(core_debug, "enable debug messages [core]");
39
40 #define em28xx_coredbg(fmt, arg...) do {\
41 if (core_debug) \
42 printk(KERN_INFO "%s %s :"fmt, \
43 dev->name, __func__ , ##arg); } while (0)
44
45 static unsigned int reg_debug;
46 module_param(reg_debug, int, 0644);
47 MODULE_PARM_DESC(reg_debug, "enable debug messages [URB reg]");
48
49 #define em28xx_regdbg(fmt, arg...) do {\
50 if (reg_debug) \
51 printk(KERN_INFO "%s %s :"fmt, \
52 dev->name, __func__ , ##arg); } while (0)
53
54 static int alt;
55 module_param(alt, int, 0644);
56 MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");
57
58 static unsigned int disable_vbi;
59 module_param(disable_vbi, int, 0644);
60 MODULE_PARM_DESC(disable_vbi, "disable vbi support");
61
62 /* FIXME */
63 #define em28xx_isocdbg(fmt, arg...) do {\
64 if (core_debug) \
65 printk(KERN_INFO "%s %s :"fmt, \
66 dev->name, __func__ , ##arg); } while (0)
67
68 /*
69 * em28xx_read_reg_req()
70 * reads data from the usb device specifying bRequest
71 */
72 int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
73 char *buf, int len)
74 {
75 int ret;
76 int pipe = usb_rcvctrlpipe(dev->udev, 0);
77
78 if (dev->state & DEV_DISCONNECTED)
79 return -ENODEV;
80
81 if (len > URB_MAX_CTRL_SIZE)
82 return -EINVAL;
83
84 if (reg_debug) {
85 printk(KERN_DEBUG "(pipe 0x%08x): "
86 "IN: %02x %02x %02x %02x %02x %02x %02x %02x ",
87 pipe,
88 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
89 req, 0, 0,
90 reg & 0xff, reg >> 8,
91 len & 0xff, len >> 8);
92 }
93
94 mutex_lock(&dev->ctrl_urb_lock);
95 ret = usb_control_msg(dev->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 if (reg_debug)
100 printk(" failed!\n");
101 mutex_unlock(&dev->ctrl_urb_lock);
102 return ret;
103 }
104
105 if (len)
106 memcpy(buf, dev->urb_buf, len);
107
108 mutex_unlock(&dev->ctrl_urb_lock);
109
110 if (reg_debug) {
111 int byte;
112
113 printk("<<<");
114 for (byte = 0; byte < len; byte++)
115 printk(" %02x", (unsigned char)buf[byte]);
116 printk("\n");
117 }
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
143 /*
144 * em28xx_write_regs_req()
145 * sends data to the usb device, specifying bRequest
146 */
147 int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
148 int len)
149 {
150 int ret;
151 int pipe = usb_sndctrlpipe(dev->udev, 0);
152
153 if (dev->state & DEV_DISCONNECTED)
154 return -ENODEV;
155
156 if ((len < 1) || (len > URB_MAX_CTRL_SIZE))
157 return -EINVAL;
158
159 if (reg_debug) {
160 int byte;
161
162 printk(KERN_DEBUG "(pipe 0x%08x): "
163 "OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>>",
164 pipe,
165 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
166 req, 0, 0,
167 reg & 0xff, reg >> 8,
168 len & 0xff, len >> 8);
169
170 for (byte = 0; byte < len; byte++)
171 printk(" %02x", (unsigned char)buf[byte]);
172 printk("\n");
173 }
174
175 mutex_lock(&dev->ctrl_urb_lock);
176 memcpy(dev->urb_buf, buf, len);
177 ret = usb_control_msg(dev->udev, pipe, req,
178 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
179 0x0000, reg, dev->urb_buf, len, HZ);
180 mutex_unlock(&dev->ctrl_urb_lock);
181
182 if (dev->wait_after_write)
183 msleep(dev->wait_after_write);
184
185 return ret;
186 }
187
188 int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len)
189 {
190 int rc;
191
192 rc = em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len);
193
194 /* Stores GPO/GPIO values at the cache, if changed
195 Only write values should be stored, since input on a GPIO
196 register will return the input bits.
197 Not sure what happens on reading GPO register.
198 */
199 if (rc >= 0) {
200 if (reg == dev->reg_gpo_num)
201 dev->reg_gpo = buf[0];
202 else if (reg == dev->reg_gpio_num)
203 dev->reg_gpio = buf[0];
204 }
205
206 return rc;
207 }
208
209 /* Write a single register */
210 int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val)
211 {
212 return em28xx_write_regs(dev, reg, &val, 1);
213 }
214
215 /*
216 * em28xx_write_reg_bits()
217 * sets only some bits (specified by bitmask) of a register, by first reading
218 * the actual value
219 */
220 int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val,
221 u8 bitmask)
222 {
223 int oldval;
224 u8 newval;
225
226 /* Uses cache for gpo/gpio registers */
227 if (reg == dev->reg_gpo_num)
228 oldval = dev->reg_gpo;
229 else if (reg == dev->reg_gpio_num)
230 oldval = dev->reg_gpio;
231 else
232 oldval = em28xx_read_reg(dev, reg);
233
234 if (oldval < 0)
235 return oldval;
236
237 newval = (((u8) oldval) & ~bitmask) | (val & bitmask);
238
239 return em28xx_write_regs(dev, reg, &newval, 1);
240 }
241
242 /*
243 * em28xx_is_ac97_ready()
244 * Checks if ac97 is ready
245 */
246 static int em28xx_is_ac97_ready(struct em28xx *dev)
247 {
248 int ret, i;
249
250 /* Wait up to 50 ms for AC97 command to complete */
251 for (i = 0; i < 10; i++, msleep(5)) {
252 ret = em28xx_read_reg(dev, EM28XX_R43_AC97BUSY);
253 if (ret < 0)
254 return ret;
255
256 if (!(ret & 0x01))
257 return 0;
258 }
259
260 em28xx_warn("AC97 command still being executed: not handled properly!\n");
261 return -EBUSY;
262 }
263
264 /*
265 * em28xx_read_ac97()
266 * write a 16 bit value to the specified AC97 address (LSB first!)
267 */
268 int em28xx_read_ac97(struct em28xx *dev, u8 reg)
269 {
270 int ret;
271 u8 addr = (reg & 0x7f) | 0x80;
272 u16 val;
273
274 ret = em28xx_is_ac97_ready(dev);
275 if (ret < 0)
276 return ret;
277
278 ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
279 if (ret < 0)
280 return ret;
281
282 ret = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R40_AC97LSB,
283 (u8 *)&val, sizeof(val));
284
285 if (ret < 0)
286 return ret;
287 return le16_to_cpu(val);
288 }
289
290 /*
291 * em28xx_write_ac97()
292 * write a 16 bit value to the specified AC97 address (LSB first!)
293 */
294 int em28xx_write_ac97(struct em28xx *dev, u8 reg, u16 val)
295 {
296 int ret;
297 u8 addr = reg & 0x7f;
298 __le16 value;
299
300 value = cpu_to_le16(val);
301
302 ret = em28xx_is_ac97_ready(dev);
303 if (ret < 0)
304 return ret;
305
306 ret = em28xx_write_regs(dev, EM28XX_R40_AC97LSB, (u8 *) &value, 2);
307 if (ret < 0)
308 return ret;
309
310 ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
311 if (ret < 0)
312 return ret;
313
314 return 0;
315 }
316
317 struct em28xx_vol_table {
318 enum em28xx_amux mux;
319 u8 reg;
320 };
321
322 static struct em28xx_vol_table inputs[] = {
323 { EM28XX_AMUX_VIDEO, AC97_VIDEO_VOL },
324 { EM28XX_AMUX_LINE_IN, AC97_LINEIN_VOL },
325 { EM28XX_AMUX_PHONE, AC97_PHONE_VOL },
326 { EM28XX_AMUX_MIC, AC97_MIC_VOL },
327 { EM28XX_AMUX_CD, AC97_CD_VOL },
328 { EM28XX_AMUX_AUX, AC97_AUX_VOL },
329 { EM28XX_AMUX_PCM_OUT, AC97_PCM_OUT_VOL },
330 };
331
332 static int set_ac97_input(struct em28xx *dev)
333 {
334 int ret, i;
335 enum em28xx_amux amux = dev->ctl_ainput;
336
337 /* EM28XX_AMUX_VIDEO2 is a special case used to indicate that
338 em28xx should point to LINE IN, while AC97 should use VIDEO
339 */
340 if (amux == EM28XX_AMUX_VIDEO2)
341 amux = EM28XX_AMUX_VIDEO;
342
343 /* Mute all entres but the one that were selected */
344 for (i = 0; i < ARRAY_SIZE(inputs); i++) {
345 if (amux == inputs[i].mux)
346 ret = em28xx_write_ac97(dev, inputs[i].reg, 0x0808);
347 else
348 ret = em28xx_write_ac97(dev, inputs[i].reg, 0x8000);
349
350 if (ret < 0)
351 em28xx_warn("couldn't setup AC97 register %d\n",
352 inputs[i].reg);
353 }
354 return 0;
355 }
356
357 static int em28xx_set_audio_source(struct em28xx *dev)
358 {
359 int ret;
360 u8 input;
361
362 if (dev->board.is_em2800) {
363 if (dev->ctl_ainput == EM28XX_AMUX_VIDEO)
364 input = EM2800_AUDIO_SRC_TUNER;
365 else
366 input = EM2800_AUDIO_SRC_LINE;
367
368 ret = em28xx_write_regs(dev, EM2800_R08_AUDIOSRC, &input, 1);
369 if (ret < 0)
370 return ret;
371 }
372
373 if (dev->board.has_msp34xx)
374 input = EM28XX_AUDIO_SRC_TUNER;
375 else {
376 switch (dev->ctl_ainput) {
377 case EM28XX_AMUX_VIDEO:
378 input = EM28XX_AUDIO_SRC_TUNER;
379 break;
380 default:
381 input = EM28XX_AUDIO_SRC_LINE;
382 break;
383 }
384 }
385
386 if (dev->board.mute_gpio && dev->mute)
387 em28xx_gpio_set(dev, dev->board.mute_gpio);
388 else
389 em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
390
391 ret = em28xx_write_reg_bits(dev, EM28XX_R0E_AUDIOSRC, input, 0xc0);
392 if (ret < 0)
393 return ret;
394 msleep(5);
395
396 switch (dev->audio_mode.ac97) {
397 case EM28XX_NO_AC97:
398 break;
399 default:
400 ret = set_ac97_input(dev);
401 }
402
403 return ret;
404 }
405
406 static const struct em28xx_vol_table outputs[] = {
407 { EM28XX_AOUT_MASTER, AC97_MASTER_VOL },
408 { EM28XX_AOUT_LINE, AC97_LINE_LEVEL_VOL },
409 { EM28XX_AOUT_MONO, AC97_MASTER_MONO_VOL },
410 { EM28XX_AOUT_LFE, AC97_LFE_MASTER_VOL },
411 { EM28XX_AOUT_SURR, AC97_SURR_MASTER_VOL },
412 };
413
414 int em28xx_audio_analog_set(struct em28xx *dev)
415 {
416 int ret, i;
417 u8 xclk;
418
419 if (!dev->audio_mode.has_audio)
420 return 0;
421
422 /* It is assumed that all devices use master volume for output.
423 It would be possible to use also line output.
424 */
425 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
426 /* Mute all outputs */
427 for (i = 0; i < ARRAY_SIZE(outputs); i++) {
428 ret = em28xx_write_ac97(dev, outputs[i].reg, 0x8000);
429 if (ret < 0)
430 em28xx_warn("couldn't setup AC97 register %d\n",
431 outputs[i].reg);
432 }
433 }
434
435 xclk = dev->board.xclk & 0x7f;
436 if (!dev->mute)
437 xclk |= EM28XX_XCLK_AUDIO_UNMUTE;
438
439 ret = em28xx_write_reg(dev, EM28XX_R0F_XCLK, xclk);
440 if (ret < 0)
441 return ret;
442 msleep(10);
443
444 /* Selects the proper audio input */
445 ret = em28xx_set_audio_source(dev);
446
447 /* Sets volume */
448 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
449 int vol;
450
451 em28xx_write_ac97(dev, AC97_POWER_DOWN_CTRL, 0x4200);
452 em28xx_write_ac97(dev, AC97_EXT_AUD_CTRL, 0x0031);
453 em28xx_write_ac97(dev, AC97_PCM_IN_SRATE, 0xbb80);
454
455 /* LSB: left channel - both channels with the same level */
456 vol = (0x1f - dev->volume) | ((0x1f - dev->volume) << 8);
457
458 /* Mute device, if needed */
459 if (dev->mute)
460 vol |= 0x8000;
461
462 /* Sets volume */
463 for (i = 0; i < ARRAY_SIZE(outputs); i++) {
464 if (dev->ctl_aoutput & outputs[i].mux)
465 ret = em28xx_write_ac97(dev, outputs[i].reg,
466 vol);
467 if (ret < 0)
468 em28xx_warn("couldn't setup AC97 register %d\n",
469 outputs[i].reg);
470 }
471
472 if (dev->ctl_aoutput & EM28XX_AOUT_PCM_IN) {
473 int sel = ac97_return_record_select(dev->ctl_aoutput);
474
475 /* Use the same input for both left and right
476 channels */
477 sel |= (sel << 8);
478
479 em28xx_write_ac97(dev, AC97_RECORD_SELECT, sel);
480 }
481 }
482
483 return ret;
484 }
485 EXPORT_SYMBOL_GPL(em28xx_audio_analog_set);
486
487 int em28xx_audio_setup(struct em28xx *dev)
488 {
489 int vid1, vid2, feat, cfg;
490 u32 vid;
491
492 if (dev->chip_id == CHIP_ID_EM2870 || dev->chip_id == CHIP_ID_EM2874) {
493 /* Digital only device - don't load any alsa module */
494 dev->audio_mode.has_audio = 0;
495 dev->has_audio_class = 0;
496 dev->has_alsa_audio = 0;
497 return 0;
498 }
499
500 /* If device doesn't support Usb Audio Class, use vendor class */
501 if (!dev->has_audio_class)
502 dev->has_alsa_audio = 1;
503
504 dev->audio_mode.has_audio = 1;
505
506 /* See how this device is configured */
507 cfg = em28xx_read_reg(dev, EM28XX_R00_CHIPCFG);
508 em28xx_info("Config register raw data: 0x%02x\n", cfg);
509 if (cfg < 0) {
510 /* Register read error? */
511 cfg = EM28XX_CHIPCFG_AC97; /* Be conservative */
512 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) == 0x00) {
513 /* The device doesn't have vendor audio at all */
514 dev->has_alsa_audio = 0;
515 dev->audio_mode.has_audio = 0;
516 return 0;
517 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
518 EM28XX_CHIPCFG_I2S_3_SAMPRATES) {
519 em28xx_info("I2S Audio (3 sample rates)\n");
520 dev->audio_mode.i2s_3rates = 1;
521 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
522 EM28XX_CHIPCFG_I2S_5_SAMPRATES) {
523 em28xx_info("I2S Audio (5 sample rates)\n");
524 dev->audio_mode.i2s_5rates = 1;
525 }
526
527 if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) != EM28XX_CHIPCFG_AC97) {
528 /* Skip the code that does AC97 vendor detection */
529 dev->audio_mode.ac97 = EM28XX_NO_AC97;
530 goto init_audio;
531 }
532
533 dev->audio_mode.ac97 = EM28XX_AC97_OTHER;
534
535 vid1 = em28xx_read_ac97(dev, AC97_VENDOR_ID1);
536 if (vid1 < 0) {
537 /*
538 * Device likely doesn't support AC97
539 * Note: (some) em2800 devices without eeprom reports 0x91 on
540 * CHIPCFG register, even not having an AC97 chip
541 */
542 em28xx_warn("AC97 chip type couldn't be determined\n");
543 dev->audio_mode.ac97 = EM28XX_NO_AC97;
544 dev->has_alsa_audio = 0;
545 dev->audio_mode.has_audio = 0;
546 goto init_audio;
547 }
548
549 vid2 = em28xx_read_ac97(dev, AC97_VENDOR_ID2);
550 if (vid2 < 0)
551 goto init_audio;
552
553 vid = vid1 << 16 | vid2;
554
555 dev->audio_mode.ac97_vendor_id = vid;
556 em28xx_warn("AC97 vendor ID = 0x%08x\n", vid);
557
558 feat = em28xx_read_ac97(dev, AC97_RESET);
559 if (feat < 0)
560 goto init_audio;
561
562 dev->audio_mode.ac97_feat = feat;
563 em28xx_warn("AC97 features = 0x%04x\n", feat);
564
565 /* Try to identify what audio processor we have */
566 if ((vid == 0xffffffff) && (feat == 0x6a90))
567 dev->audio_mode.ac97 = EM28XX_AC97_EM202;
568 else if ((vid >> 8) == 0x838476)
569 dev->audio_mode.ac97 = EM28XX_AC97_SIGMATEL;
570
571 init_audio:
572 /* Reports detected AC97 processor */
573 switch (dev->audio_mode.ac97) {
574 case EM28XX_NO_AC97:
575 em28xx_info("No AC97 audio processor\n");
576 break;
577 case EM28XX_AC97_EM202:
578 em28xx_info("Empia 202 AC97 audio processor detected\n");
579 break;
580 case EM28XX_AC97_SIGMATEL:
581 em28xx_info("Sigmatel audio processor detected(stac 97%02x)\n",
582 dev->audio_mode.ac97_vendor_id & 0xff);
583 break;
584 case EM28XX_AC97_OTHER:
585 em28xx_warn("Unknown AC97 audio processor detected!\n");
586 break;
587 default:
588 break;
589 }
590
591 return em28xx_audio_analog_set(dev);
592 }
593 EXPORT_SYMBOL_GPL(em28xx_audio_setup);
594
595 int em28xx_colorlevels_set_default(struct em28xx *dev)
596 {
597 em28xx_write_reg(dev, EM28XX_R20_YGAIN, 0x10); /* contrast */
598 em28xx_write_reg(dev, EM28XX_R21_YOFFSET, 0x00); /* brightness */
599 em28xx_write_reg(dev, EM28XX_R22_UVGAIN, 0x10); /* saturation */
600 em28xx_write_reg(dev, EM28XX_R23_UOFFSET, 0x00);
601 em28xx_write_reg(dev, EM28XX_R24_VOFFSET, 0x00);
602 em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, 0x00);
603
604 em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20);
605 em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20);
606 em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20);
607 em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20);
608 em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00);
609 em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00);
610 return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00);
611 }
612
613 int em28xx_capture_start(struct em28xx *dev, int start)
614 {
615 int rc;
616
617 if (dev->chip_id == CHIP_ID_EM2874) {
618 /* The Transport Stream Enable Register moved in em2874 */
619 if (!start) {
620 rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE,
621 0x00,
622 EM2874_TS1_CAPTURE_ENABLE);
623 return rc;
624 }
625
626 /* Enable Transport Stream */
627 rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE,
628 EM2874_TS1_CAPTURE_ENABLE,
629 EM2874_TS1_CAPTURE_ENABLE);
630 return rc;
631 }
632
633
634 /* FIXME: which is the best order? */
635 /* video registers are sampled by VREF */
636 rc = em28xx_write_reg_bits(dev, EM28XX_R0C_USBSUSP,
637 start ? 0x10 : 0x00, 0x10);
638 if (rc < 0)
639 return rc;
640
641 if (!start) {
642 /* disable video capture */
643 rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x27);
644 return rc;
645 }
646
647 if (dev->board.is_webcam)
648 rc = em28xx_write_reg(dev, 0x13, 0x0c);
649
650 /* enable video capture */
651 rc = em28xx_write_reg(dev, 0x48, 0x00);
652
653 if (dev->mode == EM28XX_ANALOG_MODE)
654 rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67);
655 else
656 rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37);
657
658 msleep(6);
659
660 return rc;
661 }
662
663 int em28xx_vbi_supported(struct em28xx *dev)
664 {
665 /* Modprobe option to manually disable */
666 if (disable_vbi == 1)
667 return 0;
668
669 if (dev->chip_id == CHIP_ID_EM2860 ||
670 dev->chip_id == CHIP_ID_EM2883)
671 return 1;
672
673 /* Version of em28xx that does not support VBI */
674 return 0;
675 }
676
677 int em28xx_set_outfmt(struct em28xx *dev)
678 {
679 int ret;
680 u8 vinctrl;
681
682 ret = em28xx_write_reg_bits(dev, EM28XX_R27_OUTFMT,
683 dev->format->reg | 0x20, 0xff);
684 if (ret < 0)
685 return ret;
686
687 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, dev->vinmode);
688 if (ret < 0)
689 return ret;
690
691 vinctrl = dev->vinctl;
692 if (em28xx_vbi_supported(dev) == 1) {
693 vinctrl |= EM28XX_VINCTRL_VBI_RAW;
694 em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00);
695 em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH, dev->vbi_width/4);
696 em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, dev->vbi_height);
697 if (dev->norm & V4L2_STD_525_60) {
698 /* NTSC */
699 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09);
700 } else if (dev->norm & V4L2_STD_625_50) {
701 /* PAL */
702 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07);
703 }
704 }
705
706 return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl);
707 }
708
709 static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax,
710 u8 ymin, u8 ymax)
711 {
712 em28xx_coredbg("em28xx Scale: (%d,%d)-(%d,%d)\n",
713 xmin, ymin, xmax, ymax);
714
715 em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1);
716 em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1);
717 em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1);
718 return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1);
719 }
720
721 static int em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart,
722 u16 width, u16 height)
723 {
724 u8 cwidth = width;
725 u8 cheight = height;
726 u8 overflow = (height >> 7 & 0x02) | (width >> 8 & 0x01);
727
728 em28xx_coredbg("em28xx Area Set: (%d,%d)\n",
729 (width | (overflow & 2) << 7),
730 (height | (overflow & 1) << 8));
731
732 em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1);
733 em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1);
734 em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1);
735 em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1);
736 return em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1);
737 }
738
739 static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v)
740 {
741 u8 mode;
742 /* the em2800 scaler only supports scaling down to 50% */
743
744 if (dev->board.is_em2800) {
745 mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00);
746 } else {
747 u8 buf[2];
748
749 buf[0] = h;
750 buf[1] = h >> 8;
751 em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2);
752
753 buf[0] = v;
754 buf[1] = v >> 8;
755 em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2);
756 /* it seems that both H and V scalers must be active
757 to work correctly */
758 mode = (h || v) ? 0x30 : 0x00;
759 }
760 return em28xx_write_reg_bits(dev, EM28XX_R26_COMPR, mode, 0x30);
761 }
762
763 /* FIXME: this only function read values from dev */
764 int em28xx_resolution_set(struct em28xx *dev)
765 {
766 int width, height;
767 width = norm_maxw(dev);
768 height = norm_maxh(dev);
769
770 /* Properly setup VBI */
771 dev->vbi_width = 720;
772 if (dev->norm & V4L2_STD_525_60)
773 dev->vbi_height = 12;
774 else
775 dev->vbi_height = 18;
776
777 if (!dev->progressive)
778 height >>= norm_maxh(dev);
779
780 em28xx_set_outfmt(dev);
781
782
783 em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2);
784
785 /* If we don't set the start position to 4 in VBI mode, we end up
786 with line 21 being YUYV encoded instead of being in 8-bit
787 greyscale */
788 if (em28xx_vbi_supported(dev) == 1)
789 em28xx_capture_area_set(dev, 0, 4, width >> 2, height >> 2);
790 else
791 em28xx_capture_area_set(dev, 0, 0, width >> 2, height >> 2);
792
793 return em28xx_scaler_set(dev, dev->hscale, dev->vscale);
794 }
795
796 int em28xx_set_alternate(struct em28xx *dev)
797 {
798 int errCode, prev_alt = dev->alt;
799 int i;
800 unsigned int min_pkt_size = dev->width * 2 + 4;
801
802 /*
803 * alt = 0 is used only for control messages, so, only values
804 * greater than 0 can be used for streaming.
805 */
806 if (alt && alt < dev->num_alt) {
807 em28xx_coredbg("alternate forced to %d\n", dev->alt);
808 dev->alt = alt;
809 goto set_alt;
810 }
811
812 /* When image size is bigger than a certain value,
813 the frame size should be increased, otherwise, only
814 green screen will be received.
815 */
816 if (dev->width * 2 * dev->height > 720 * 240 * 2)
817 min_pkt_size *= 2;
818
819 for (i = 0; i < dev->num_alt; i++) {
820 /* stop when the selected alt setting offers enough bandwidth */
821 if (dev->alt_max_pkt_size[i] >= min_pkt_size) {
822 dev->alt = i;
823 break;
824 /* otherwise make sure that we end up with the maximum bandwidth
825 because the min_pkt_size equation might be wrong...
826 */
827 } else if (dev->alt_max_pkt_size[i] >
828 dev->alt_max_pkt_size[dev->alt])
829 dev->alt = i;
830 }
831
832 set_alt:
833 if (dev->alt != prev_alt) {
834 em28xx_coredbg("minimum isoc packet size: %u (alt=%d)\n",
835 min_pkt_size, dev->alt);
836 dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt];
837 em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n",
838 dev->alt, dev->max_pkt_size);
839 errCode = usb_set_interface(dev->udev, 0, dev->alt);
840 if (errCode < 0) {
841 em28xx_errdev("cannot change alternate number to %d (error=%i)\n",
842 dev->alt, errCode);
843 return errCode;
844 }
845 }
846 return 0;
847 }
848
849 int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio)
850 {
851 int rc = 0;
852
853 if (!gpio)
854 return rc;
855
856 if (dev->mode != EM28XX_SUSPEND) {
857 em28xx_write_reg(dev, 0x48, 0x00);
858 if (dev->mode == EM28XX_ANALOG_MODE)
859 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67);
860 else
861 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37);
862 msleep(6);
863 }
864
865 /* Send GPIO reset sequences specified at board entry */
866 while (gpio->sleep >= 0) {
867 if (gpio->reg >= 0) {
868 rc = em28xx_write_reg_bits(dev,
869 gpio->reg,
870 gpio->val,
871 gpio->mask);
872 if (rc < 0)
873 return rc;
874 }
875 if (gpio->sleep > 0)
876 msleep(gpio->sleep);
877
878 gpio++;
879 }
880 return rc;
881 }
882
883 int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode)
884 {
885 if (dev->mode == set_mode)
886 return 0;
887
888 if (set_mode == EM28XX_SUSPEND) {
889 dev->mode = set_mode;
890
891 /* FIXME: add suspend support for ac97 */
892
893 return em28xx_gpio_set(dev, dev->board.suspend_gpio);
894 }
895
896 dev->mode = set_mode;
897
898 if (dev->mode == EM28XX_DIGITAL_MODE)
899 return em28xx_gpio_set(dev, dev->board.dvb_gpio);
900 else
901 return em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
902 }
903 EXPORT_SYMBOL_GPL(em28xx_set_mode);
904
905 /* ------------------------------------------------------------------
906 URB control
907 ------------------------------------------------------------------*/
908
909 /*
910 * IRQ callback, called by URB callback
911 */
912 static void em28xx_irq_callback(struct urb *urb)
913 {
914 struct em28xx *dev = urb->context;
915 int rc, i;
916
917 switch (urb->status) {
918 case 0: /* success */
919 case -ETIMEDOUT: /* NAK */
920 break;
921 case -ECONNRESET: /* kill */
922 case -ENOENT:
923 case -ESHUTDOWN:
924 return;
925 default: /* error */
926 em28xx_isocdbg("urb completition error %d.\n", urb->status);
927 break;
928 }
929
930 /* Copy data from URB */
931 spin_lock(&dev->slock);
932 rc = dev->isoc_ctl.isoc_copy(dev, urb);
933 spin_unlock(&dev->slock);
934
935 /* Reset urb buffers */
936 for (i = 0; i < urb->number_of_packets; i++) {
937 urb->iso_frame_desc[i].status = 0;
938 urb->iso_frame_desc[i].actual_length = 0;
939 }
940 urb->status = 0;
941
942 urb->status = usb_submit_urb(urb, GFP_ATOMIC);
943 if (urb->status) {
944 em28xx_isocdbg("urb resubmit failed (error=%i)\n",
945 urb->status);
946 }
947 }
948
949 /*
950 * Stop and Deallocate URBs
951 */
952 void em28xx_uninit_isoc(struct em28xx *dev)
953 {
954 struct urb *urb;
955 int i;
956
957 em28xx_isocdbg("em28xx: called em28xx_uninit_isoc\n");
958
959 dev->isoc_ctl.nfields = -1;
960 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
961 urb = dev->isoc_ctl.urb[i];
962 if (urb) {
963 if (!irqs_disabled())
964 usb_kill_urb(urb);
965 else
966 usb_unlink_urb(urb);
967
968 if (dev->isoc_ctl.transfer_buffer[i]) {
969 usb_free_coherent(dev->udev,
970 urb->transfer_buffer_length,
971 dev->isoc_ctl.transfer_buffer[i],
972 urb->transfer_dma);
973 }
974 usb_free_urb(urb);
975 dev->isoc_ctl.urb[i] = NULL;
976 }
977 dev->isoc_ctl.transfer_buffer[i] = NULL;
978 }
979
980 kfree(dev->isoc_ctl.urb);
981 kfree(dev->isoc_ctl.transfer_buffer);
982
983 dev->isoc_ctl.urb = NULL;
984 dev->isoc_ctl.transfer_buffer = NULL;
985 dev->isoc_ctl.num_bufs = 0;
986
987 em28xx_capture_start(dev, 0);
988 }
989 EXPORT_SYMBOL_GPL(em28xx_uninit_isoc);
990
991 /*
992 * Allocate URBs and start IRQ
993 */
994 int em28xx_init_isoc(struct em28xx *dev, int max_packets,
995 int num_bufs, int max_pkt_size,
996 int (*isoc_copy) (struct em28xx *dev, struct urb *urb))
997 {
998 struct em28xx_dmaqueue *dma_q = &dev->vidq;
999 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
1000 int i;
1001 int sb_size, pipe;
1002 struct urb *urb;
1003 int j, k;
1004 int rc;
1005
1006 em28xx_isocdbg("em28xx: called em28xx_prepare_isoc\n");
1007
1008 /* De-allocates all pending stuff */
1009 em28xx_uninit_isoc(dev);
1010
1011 dev->isoc_ctl.isoc_copy = isoc_copy;
1012 dev->isoc_ctl.num_bufs = num_bufs;
1013
1014 dev->isoc_ctl.urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
1015 if (!dev->isoc_ctl.urb) {
1016 em28xx_errdev("cannot alloc memory for usb buffers\n");
1017 return -ENOMEM;
1018 }
1019
1020 dev->isoc_ctl.transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
1021 GFP_KERNEL);
1022 if (!dev->isoc_ctl.transfer_buffer) {
1023 em28xx_errdev("cannot allocate memory for usb transfer\n");
1024 kfree(dev->isoc_ctl.urb);
1025 return -ENOMEM;
1026 }
1027
1028 dev->isoc_ctl.max_pkt_size = max_pkt_size;
1029 dev->isoc_ctl.vid_buf = NULL;
1030 dev->isoc_ctl.vbi_buf = NULL;
1031
1032 sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
1033
1034 /* allocate urbs and transfer buffers */
1035 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
1036 urb = usb_alloc_urb(max_packets, GFP_KERNEL);
1037 if (!urb) {
1038 em28xx_err("cannot alloc isoc_ctl.urb %i\n", i);
1039 em28xx_uninit_isoc(dev);
1040 return -ENOMEM;
1041 }
1042 dev->isoc_ctl.urb[i] = urb;
1043
1044 dev->isoc_ctl.transfer_buffer[i] = usb_alloc_coherent(dev->udev,
1045 sb_size, GFP_KERNEL, &urb->transfer_dma);
1046 if (!dev->isoc_ctl.transfer_buffer[i]) {
1047 em28xx_err("unable to allocate %i bytes for transfer"
1048 " buffer %i%s\n",
1049 sb_size, i,
1050 in_interrupt() ? " while in int" : "");
1051 em28xx_uninit_isoc(dev);
1052 return -ENOMEM;
1053 }
1054 memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
1055
1056 /* FIXME: this is a hack - should be
1057 'desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK'
1058 should also be using 'desc.bInterval'
1059 */
1060 pipe = usb_rcvisocpipe(dev->udev,
1061 dev->mode == EM28XX_ANALOG_MODE ? 0x82 : 0x84);
1062
1063 usb_fill_int_urb(urb, dev->udev, pipe,
1064 dev->isoc_ctl.transfer_buffer[i], sb_size,
1065 em28xx_irq_callback, dev, 1);
1066
1067 urb->number_of_packets = max_packets;
1068 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1069
1070 k = 0;
1071 for (j = 0; j < max_packets; j++) {
1072 urb->iso_frame_desc[j].offset = k;
1073 urb->iso_frame_desc[j].length =
1074 dev->isoc_ctl.max_pkt_size;
1075 k += dev->isoc_ctl.max_pkt_size;
1076 }
1077 }
1078
1079 init_waitqueue_head(&dma_q->wq);
1080 init_waitqueue_head(&vbi_dma_q->wq);
1081
1082 em28xx_capture_start(dev, 1);
1083
1084 /* submit urbs and enables IRQ */
1085 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
1086 rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
1087 if (rc) {
1088 em28xx_err("submit of urb %i failed (error=%i)\n", i,
1089 rc);
1090 em28xx_uninit_isoc(dev);
1091 return rc;
1092 }
1093 }
1094
1095 return 0;
1096 }
1097 EXPORT_SYMBOL_GPL(em28xx_init_isoc);
1098
1099 /* Determine the packet size for the DVB stream for the given device
1100 (underlying value programmed into the eeprom) */
1101 int em28xx_isoc_dvb_max_packetsize(struct em28xx *dev)
1102 {
1103 unsigned int chip_cfg2;
1104 unsigned int packet_size = 564;
1105
1106 if (dev->chip_id == CHIP_ID_EM2874) {
1107 /* FIXME - for now assume 564 like it was before, but the
1108 em2874 code should be added to return the proper value... */
1109 packet_size = 564;
1110 } else {
1111 /* TS max packet size stored in bits 1-0 of R01 */
1112 chip_cfg2 = em28xx_read_reg(dev, EM28XX_R01_CHIPCFG2);
1113 switch (chip_cfg2 & EM28XX_CHIPCFG2_TS_PACKETSIZE_MASK) {
1114 case EM28XX_CHIPCFG2_TS_PACKETSIZE_188:
1115 packet_size = 188;
1116 break;
1117 case EM28XX_CHIPCFG2_TS_PACKETSIZE_376:
1118 packet_size = 376;
1119 break;
1120 case EM28XX_CHIPCFG2_TS_PACKETSIZE_564:
1121 packet_size = 564;
1122 break;
1123 case EM28XX_CHIPCFG2_TS_PACKETSIZE_752:
1124 packet_size = 752;
1125 break;
1126 }
1127 }
1128
1129 em28xx_coredbg("dvb max packet size=%d\n", packet_size);
1130 return packet_size;
1131 }
1132 EXPORT_SYMBOL_GPL(em28xx_isoc_dvb_max_packetsize);
1133
1134 /*
1135 * em28xx_wake_i2c()
1136 * configure i2c attached devices
1137 */
1138 void em28xx_wake_i2c(struct em28xx *dev)
1139 {
1140 v4l2_device_call_all(&dev->v4l2_dev, 0, core, reset, 0);
1141 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
1142 INPUT(dev->ctl_input)->vmux, 0, 0);
1143 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
1144 }
1145
1146 /*
1147 * Device control list
1148 */
1149
1150 static LIST_HEAD(em28xx_devlist);
1151 static DEFINE_MUTEX(em28xx_devlist_mutex);
1152
1153 /*
1154 * em28xx_realease_resources()
1155 * unregisters the v4l2,i2c and usb devices
1156 * called when the device gets disconected or at module unload
1157 */
1158 void em28xx_remove_from_devlist(struct em28xx *dev)
1159 {
1160 mutex_lock(&em28xx_devlist_mutex);
1161 list_del(&dev->devlist);
1162 mutex_unlock(&em28xx_devlist_mutex);
1163 };
1164
1165 void em28xx_add_into_devlist(struct em28xx *dev)
1166 {
1167 mutex_lock(&em28xx_devlist_mutex);
1168 list_add_tail(&dev->devlist, &em28xx_devlist);
1169 mutex_unlock(&em28xx_devlist_mutex);
1170 };
1171
1172 /*
1173 * Extension interface
1174 */
1175
1176 static LIST_HEAD(em28xx_extension_devlist);
1177 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1178
1179 int em28xx_register_extension(struct em28xx_ops *ops)
1180 {
1181 struct em28xx *dev = NULL;
1182
1183 mutex_lock(&em28xx_devlist_mutex);
1184 mutex_lock(&em28xx_extension_devlist_lock);
1185 list_add_tail(&ops->next, &em28xx_extension_devlist);
1186 list_for_each_entry(dev, &em28xx_devlist, devlist) {
1187 if (dev)
1188 ops->init(dev);
1189 }
1190 printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1191 mutex_unlock(&em28xx_extension_devlist_lock);
1192 mutex_unlock(&em28xx_devlist_mutex);
1193 return 0;
1194 }
1195 EXPORT_SYMBOL(em28xx_register_extension);
1196
1197 void em28xx_unregister_extension(struct em28xx_ops *ops)
1198 {
1199 struct em28xx *dev = NULL;
1200
1201 mutex_lock(&em28xx_devlist_mutex);
1202 list_for_each_entry(dev, &em28xx_devlist, devlist) {
1203 if (dev)
1204 ops->fini(dev);
1205 }
1206
1207 mutex_lock(&em28xx_extension_devlist_lock);
1208 printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1209 list_del(&ops->next);
1210 mutex_unlock(&em28xx_extension_devlist_lock);
1211 mutex_unlock(&em28xx_devlist_mutex);
1212 }
1213 EXPORT_SYMBOL(em28xx_unregister_extension);
1214
1215 void em28xx_init_extension(struct em28xx *dev)
1216 {
1217 struct em28xx_ops *ops = NULL;
1218
1219 mutex_lock(&em28xx_extension_devlist_lock);
1220 if (!list_empty(&em28xx_extension_devlist)) {
1221 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1222 if (ops->init)
1223 ops->init(dev);
1224 }
1225 }
1226 mutex_unlock(&em28xx_extension_devlist_lock);
1227 }
1228
1229 void em28xx_close_extension(struct em28xx *dev)
1230 {
1231 struct em28xx_ops *ops = NULL;
1232
1233 mutex_lock(&em28xx_extension_devlist_lock);
1234 if (!list_empty(&em28xx_extension_devlist)) {
1235 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1236 if (ops->fini)
1237 ops->fini(dev);
1238 }
1239 }
1240 mutex_unlock(&em28xx_extension_devlist_lock);
1241 }
Linus' kernel tree