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interconnect: qcom: Fix Kconfig indentation
[linux/fpc-iii.git] / drivers / media / usb / em28xx / em28xx-video.c
blobb0f7390e4b4f2ac686dbc707df331bd4d66fbf30
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
4 // video capture devices
5 //
6 // Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
7 // Markus Rechberger <mrechberger@gmail.com>
8 // Mauro Carvalho Chehab <mchehab@kernel.org>
9 // Sascha Sommer <saschasommer@freenet.de>
10 // Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com>
11 //
12 // Some parts based on SN9C10x PC Camera Controllers GPL driver made
13 // by Luca Risolia <luca.risolia@studio.unibo.it>
14 //
15 // This program is free software; you can redistribute it and/or modify
16 // it under the terms of the GNU General Public License as published by
17 // the Free Software Foundation; either version 2 of the License, or
18 // (at your option) any later version.
19 //
20 // This program is distributed in the hope that it will be useful,
21 // but WITHOUT ANY WARRANTY; without even the implied warranty of
22 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 // GNU General Public License for more details.
24
25 #include "em28xx.h"
26
27 #include <linux/init.h>
28 #include <linux/list.h>
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/bitmap.h>
32 #include <linux/usb.h>
33 #include <linux/i2c.h>
34 #include <linux/mm.h>
35 #include <linux/mutex.h>
36 #include <linux/slab.h>
37
38 #include "em28xx-v4l.h"
39 #include <media/v4l2-common.h>
40 #include <media/v4l2-ioctl.h>
41 #include <media/v4l2-event.h>
42 #include <media/drv-intf/msp3400.h>
43 #include <media/tuner.h>
44
45 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
46 "Markus Rechberger <mrechberger@gmail.com>, " \
47 "Mauro Carvalho Chehab <mchehab@kernel.org>, " \
48 "Sascha Sommer <saschasommer@freenet.de>"
49
50 static unsigned int isoc_debug;
51 module_param(isoc_debug, int, 0644);
52 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
53
54 static unsigned int disable_vbi;
55 module_param(disable_vbi, int, 0644);
56 MODULE_PARM_DESC(disable_vbi, "disable vbi support");
57
58 static int alt;
59 module_param(alt, int, 0644);
60 MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");
61
62 #define em28xx_videodbg(fmt, arg...) do { \
63 if (video_debug) \
64 dev_printk(KERN_DEBUG, &dev->intf->dev, \
65 "video: %s: " fmt, __func__, ## arg); \
66 } while (0)
67
68 #define em28xx_isocdbg(fmt, arg...) do {\
69 if (isoc_debug) \
70 dev_printk(KERN_DEBUG, &dev->intf->dev, \
71 "isoc: %s: " fmt, __func__, ## arg); \
72 } while (0)
73
74 MODULE_AUTHOR(DRIVER_AUTHOR);
75 MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface");
76 MODULE_LICENSE("GPL v2");
77 MODULE_VERSION(EM28XX_VERSION);
78
79 #define EM25XX_FRMDATAHDR_BYTE1 0x02
80 #define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE 0x20
81 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_END 0x02
82 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID 0x01
83 #define EM25XX_FRMDATAHDR_BYTE2_MASK (EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \
84 EM25XX_FRMDATAHDR_BYTE2_FRAME_END | \
85 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID)
86
87 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
88 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
89 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
90
91 module_param_array(video_nr, int, NULL, 0444);
92 module_param_array(vbi_nr, int, NULL, 0444);
93 module_param_array(radio_nr, int, NULL, 0444);
94 MODULE_PARM_DESC(video_nr, "video device numbers");
95 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
96 MODULE_PARM_DESC(radio_nr, "radio device numbers");
97
98 static unsigned int video_debug;
99 module_param(video_debug, int, 0644);
100 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
101
102 /* supported video standards */
103 static struct em28xx_fmt format[] = {
104 {
105 .fourcc = V4L2_PIX_FMT_YUYV,
106 .depth = 16,
107 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V,
108 }, {
109 .fourcc = V4L2_PIX_FMT_RGB565,
110 .depth = 16,
111 .reg = EM28XX_OUTFMT_RGB_16_656,
112 }, {
113 .fourcc = V4L2_PIX_FMT_SRGGB8,
114 .depth = 8,
115 .reg = EM28XX_OUTFMT_RGB_8_RGRG,
116 }, {
117 .fourcc = V4L2_PIX_FMT_SBGGR8,
118 .depth = 8,
119 .reg = EM28XX_OUTFMT_RGB_8_BGBG,
120 }, {
121 .fourcc = V4L2_PIX_FMT_SGRBG8,
122 .depth = 8,
123 .reg = EM28XX_OUTFMT_RGB_8_GRGR,
124 }, {
125 .fourcc = V4L2_PIX_FMT_SGBRG8,
126 .depth = 8,
127 .reg = EM28XX_OUTFMT_RGB_8_GBGB,
128 }, {
129 .fourcc = V4L2_PIX_FMT_YUV411P,
130 .depth = 12,
131 .reg = EM28XX_OUTFMT_YUV411,
132 },
133 };
134
135 /*FIXME: maxw should be dependent of alt mode */
136 static inline unsigned int norm_maxw(struct em28xx *dev)
137 {
138 struct em28xx_v4l2 *v4l2 = dev->v4l2;
139
140 if (dev->is_webcam)
141 return v4l2->sensor_xres;
142
143 if (dev->board.max_range_640_480)
144 return 640;
145
146 return 720;
147 }
148
149 static inline unsigned int norm_maxh(struct em28xx *dev)
150 {
151 struct em28xx_v4l2 *v4l2 = dev->v4l2;
152
153 if (dev->is_webcam)
154 return v4l2->sensor_yres;
155
156 if (dev->board.max_range_640_480)
157 return 480;
158
159 return (v4l2->norm & V4L2_STD_625_50) ? 576 : 480;
160 }
161
162 static int em28xx_vbi_supported(struct em28xx *dev)
163 {
164 /* Modprobe option to manually disable */
165 if (disable_vbi == 1)
166 return 0;
167
168 if (dev->is_webcam)
169 return 0;
170
171 /* FIXME: check subdevices for VBI support */
172
173 if (dev->chip_id == CHIP_ID_EM2860 ||
174 dev->chip_id == CHIP_ID_EM2883)
175 return 1;
176
177 /* Version of em28xx that does not support VBI */
178 return 0;
179 }
180
181 /*
182 * em28xx_wake_i2c()
183 * configure i2c attached devices
184 */
185 static void em28xx_wake_i2c(struct em28xx *dev)
186 {
187 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
188
189 v4l2_device_call_all(v4l2_dev, 0, core, reset, 0);
190 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
191 INPUT(dev->ctl_input)->vmux, 0, 0);
192 }
193
194 static int em28xx_colorlevels_set_default(struct em28xx *dev)
195 {
196 em28xx_write_reg(dev, EM28XX_R20_YGAIN, CONTRAST_DEFAULT);
197 em28xx_write_reg(dev, EM28XX_R21_YOFFSET, BRIGHTNESS_DEFAULT);
198 em28xx_write_reg(dev, EM28XX_R22_UVGAIN, SATURATION_DEFAULT);
199 em28xx_write_reg(dev, EM28XX_R23_UOFFSET, BLUE_BALANCE_DEFAULT);
200 em28xx_write_reg(dev, EM28XX_R24_VOFFSET, RED_BALANCE_DEFAULT);
201 em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, SHARPNESS_DEFAULT);
202
203 em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20);
204 em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20);
205 em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20);
206 em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20);
207 em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00);
208 em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00);
209 return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00);
210 }
211
212 static int em28xx_set_outfmt(struct em28xx *dev)
213 {
214 int ret;
215 u8 fmt, vinctrl;
216 struct em28xx_v4l2 *v4l2 = dev->v4l2;
217
218 fmt = v4l2->format->reg;
219 if (!dev->is_em25xx)
220 fmt |= 0x20;
221 /*
222 * NOTE: it's not clear if this is really needed !
223 * The datasheets say bit 5 is a reserved bit and devices seem to work
224 * fine without it. But the Windows driver sets it for em2710/50+em28xx
225 * devices and we've always been setting it, too.
226 *
227 * em2765 (em25xx, em276x/7x/8x) devices do NOT work with this bit set,
228 * it's likely used for an additional (compressed ?) format there.
229 */
230 ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt);
231 if (ret < 0)
232 return ret;
233
234 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, v4l2->vinmode);
235 if (ret < 0)
236 return ret;
237
238 vinctrl = v4l2->vinctl;
239 if (em28xx_vbi_supported(dev) == 1) {
240 vinctrl |= EM28XX_VINCTRL_VBI_RAW;
241 em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00);
242 em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH,
243 v4l2->vbi_width / 4);
244 em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, v4l2->vbi_height);
245 if (v4l2->norm & V4L2_STD_525_60) {
246 /* NTSC */
247 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09);
248 } else if (v4l2->norm & V4L2_STD_625_50) {
249 /* PAL */
250 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07);
251 }
252 }
253
254 return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl);
255 }
256
257 static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax,
258 u8 ymin, u8 ymax)
259 {
260 em28xx_videodbg("em28xx Scale: (%d,%d)-(%d,%d)\n",
261 xmin, ymin, xmax, ymax);
262
263 em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1);
264 em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1);
265 em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1);
266 return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1);
267 }
268
269 static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart,
270 u16 width, u16 height)
271 {
272 u8 cwidth = width >> 2;
273 u8 cheight = height >> 2;
274 u8 overflow = (height >> 9 & 0x02) | (width >> 10 & 0x01);
275 /* NOTE: size limit: 2047x1023 = 2MPix */
276
277 em28xx_videodbg("capture area set to (%d,%d): %dx%d\n",
278 hstart, vstart,
279 ((overflow & 2) << 9 | cwidth << 2),
280 ((overflow & 1) << 10 | cheight << 2));
281
282 em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1);
283 em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1);
284 em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1);
285 em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1);
286 em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1);
287
288 /* FIXME: function/meaning of these registers ? */
289 /* FIXME: align width+height to multiples of 4 ?! */
290 if (dev->is_em25xx) {
291 em28xx_write_reg(dev, 0x34, width >> 4);
292 em28xx_write_reg(dev, 0x35, height >> 4);
293 }
294 }
295
296 static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v)
297 {
298 u8 mode = 0x00;
299 /* the em2800 scaler only supports scaling down to 50% */
300
301 if (dev->board.is_em2800) {
302 mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00);
303 } else {
304 u8 buf[2];
305
306 buf[0] = h;
307 buf[1] = h >> 8;
308 em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2);
309
310 buf[0] = v;
311 buf[1] = v >> 8;
312 em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2);
313 /*
314 * it seems that both H and V scalers must be active
315 * to work correctly
316 */
317 mode = (h || v) ? 0x30 : 0x00;
318 }
319 return em28xx_write_reg(dev, EM28XX_R26_COMPR, mode);
320 }
321
322 /* FIXME: this only function read values from dev */
323 static int em28xx_resolution_set(struct em28xx *dev)
324 {
325 struct em28xx_v4l2 *v4l2 = dev->v4l2;
326 int width = norm_maxw(dev);
327 int height = norm_maxh(dev);
328
329 /* Properly setup VBI */
330 v4l2->vbi_width = 720;
331 if (v4l2->norm & V4L2_STD_525_60)
332 v4l2->vbi_height = 12;
333 else
334 v4l2->vbi_height = 18;
335
336 em28xx_set_outfmt(dev);
337
338 em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2);
339
340 /*
341 * If we don't set the start position to 2 in VBI mode, we end up
342 * with line 20/21 being YUYV encoded instead of being in 8-bit
343 * greyscale. The core of the issue is that line 21 (and line 23 for
344 * PAL WSS) are inside of active video region, and as a result they
345 * get the pixelformatting associated with that area. So by cropping
346 * it out, we end up with the same format as the rest of the VBI
347 * region
348 */
349 if (em28xx_vbi_supported(dev) == 1)
350 em28xx_capture_area_set(dev, 0, 2, width, height);
351 else
352 em28xx_capture_area_set(dev, 0, 0, width, height);
353
354 return em28xx_scaler_set(dev, v4l2->hscale, v4l2->vscale);
355 }
356
357 /* Set USB alternate setting for analog video */
358 static int em28xx_set_alternate(struct em28xx *dev)
359 {
360 struct em28xx_v4l2 *v4l2 = dev->v4l2;
361 struct usb_device *udev = interface_to_usbdev(dev->intf);
362 int err;
363 int i;
364 unsigned int min_pkt_size = v4l2->width * 2 + 4;
365
366 /*
367 * NOTE: for isoc transfers, only alt settings > 0 are allowed
368 * bulk transfers seem to work only with alt=0 !
369 */
370 dev->alt = 0;
371 if (alt > 0 && alt < dev->num_alt) {
372 em28xx_videodbg("alternate forced to %d\n", dev->alt);
373 dev->alt = alt;
374 goto set_alt;
375 }
376 if (dev->analog_xfer_bulk)
377 goto set_alt;
378
379 /*
380 * When image size is bigger than a certain value,
381 * the frame size should be increased, otherwise, only
382 * green screen will be received.
383 */
384 if (v4l2->width * 2 * v4l2->height > 720 * 240 * 2)
385 min_pkt_size *= 2;
386
387 for (i = 0; i < dev->num_alt; i++) {
388 /* stop when the selected alt setting offers enough bandwidth */
389 if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) {
390 dev->alt = i;
391 break;
392 /*
393 * otherwise make sure that we end up with the maximum
394 * bandwidth because the min_pkt_size equation might be wrong.
395 *
396 */
397 } else if (dev->alt_max_pkt_size_isoc[i] >
398 dev->alt_max_pkt_size_isoc[dev->alt])
399 dev->alt = i;
400 }
401
402 set_alt:
403 /*
404 * NOTE: for bulk transfers, we need to call usb_set_interface()
405 * even if the previous settings were the same. Otherwise streaming
406 * fails with all urbs having status = -EOVERFLOW !
407 */
408 if (dev->analog_xfer_bulk) {
409 dev->max_pkt_size = 512; /* USB 2.0 spec */
410 dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER;
411 } else { /* isoc */
412 em28xx_videodbg("minimum isoc packet size: %u (alt=%d)\n",
413 min_pkt_size, dev->alt);
414 dev->max_pkt_size =
415 dev->alt_max_pkt_size_isoc[dev->alt];
416 dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS;
417 }
418 em28xx_videodbg("setting alternate %d with wMaxPacketSize=%u\n",
419 dev->alt, dev->max_pkt_size);
420 err = usb_set_interface(udev, dev->ifnum, dev->alt);
421 if (err < 0) {
422 dev_err(&dev->intf->dev,
423 "cannot change alternate number to %d (error=%i)\n",
424 dev->alt, err);
425 return err;
426 }
427 return 0;
428 }
429
430 /*
431 * DMA and thread functions
432 */
433
434 /*
435 * Finish the current buffer
436 */
437 static inline void finish_buffer(struct em28xx *dev,
438 struct em28xx_buffer *buf)
439 {
440 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
441
442 buf->vb.sequence = dev->v4l2->field_count++;
443 if (dev->v4l2->progressive)
444 buf->vb.field = V4L2_FIELD_NONE;
445 else
446 buf->vb.field = V4L2_FIELD_INTERLACED;
447 buf->vb.vb2_buf.timestamp = ktime_get_ns();
448
449 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
450 }
451
452 /*
453 * Copy picture data from USB buffer to videobuf buffer
454 */
455 static void em28xx_copy_video(struct em28xx *dev,
456 struct em28xx_buffer *buf,
457 unsigned char *usb_buf,
458 unsigned long len)
459 {
460 struct em28xx_v4l2 *v4l2 = dev->v4l2;
461 void *fieldstart, *startwrite, *startread;
462 int linesdone, currlinedone, offset, lencopy, remain;
463 int bytesperline = v4l2->width << 1;
464
465 if (buf->pos + len > buf->length)
466 len = buf->length - buf->pos;
467
468 startread = usb_buf;
469 remain = len;
470
471 if (v4l2->progressive || buf->top_field)
472 fieldstart = buf->vb_buf;
473 else /* interlaced mode, even nr. of lines */
474 fieldstart = buf->vb_buf + bytesperline;
475
476 linesdone = buf->pos / bytesperline;
477 currlinedone = buf->pos % bytesperline;
478
479 if (v4l2->progressive)
480 offset = linesdone * bytesperline + currlinedone;
481 else
482 offset = linesdone * bytesperline * 2 + currlinedone;
483
484 startwrite = fieldstart + offset;
485 lencopy = bytesperline - currlinedone;
486 lencopy = lencopy > remain ? remain : lencopy;
487
488 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) {
489 em28xx_isocdbg("Overflow of %zu bytes past buffer end (1)\n",
490 ((char *)startwrite + lencopy) -
491 ((char *)buf->vb_buf + buf->length));
492 remain = (char *)buf->vb_buf + buf->length -
493 (char *)startwrite;
494 lencopy = remain;
495 }
496 if (lencopy <= 0)
497 return;
498 memcpy(startwrite, startread, lencopy);
499
500 remain -= lencopy;
501
502 while (remain > 0) {
503 if (v4l2->progressive)
504 startwrite += lencopy;
505 else
506 startwrite += lencopy + bytesperline;
507 startread += lencopy;
508 if (bytesperline > remain)
509 lencopy = remain;
510 else
511 lencopy = bytesperline;
512
513 if ((char *)startwrite + lencopy > (char *)buf->vb_buf +
514 buf->length) {
515 em28xx_isocdbg("Overflow of %zu bytes past buffer end(2)\n",
516 ((char *)startwrite + lencopy) -
517 ((char *)buf->vb_buf + buf->length));
518 remain = (char *)buf->vb_buf + buf->length -
519 (char *)startwrite;
520 lencopy = remain;
521 }
522 if (lencopy <= 0)
523 break;
524
525 memcpy(startwrite, startread, lencopy);
526
527 remain -= lencopy;
528 }
529
530 buf->pos += len;
531 }
532
533 /*
534 * Copy VBI data from USB buffer to videobuf buffer
535 */
536 static void em28xx_copy_vbi(struct em28xx *dev,
537 struct em28xx_buffer *buf,
538 unsigned char *usb_buf,
539 unsigned long len)
540 {
541 unsigned int offset;
542
543 if (buf->pos + len > buf->length)
544 len = buf->length - buf->pos;
545
546 offset = buf->pos;
547 /* Make sure the bottom field populates the second half of the frame */
548 if (buf->top_field == 0)
549 offset += dev->v4l2->vbi_width * dev->v4l2->vbi_height;
550
551 memcpy(buf->vb_buf + offset, usb_buf, len);
552 buf->pos += len;
553 }
554
555 static inline void print_err_status(struct em28xx *dev,
556 int packet, int status)
557 {
558 char *errmsg = "Unknown";
559
560 switch (status) {
561 case -ENOENT:
562 errmsg = "unlinked synchronously";
563 break;
564 case -ECONNRESET:
565 errmsg = "unlinked asynchronously";
566 break;
567 case -ENOSR:
568 errmsg = "Buffer error (overrun)";
569 break;
570 case -EPIPE:
571 errmsg = "Stalled (device not responding)";
572 break;
573 case -EOVERFLOW:
574 errmsg = "Babble (bad cable?)";
575 break;
576 case -EPROTO:
577 errmsg = "Bit-stuff error (bad cable?)";
578 break;
579 case -EILSEQ:
580 errmsg = "CRC/Timeout (could be anything)";
581 break;
582 case -ETIME:
583 errmsg = "Device does not respond";
584 break;
585 }
586 if (packet < 0) {
587 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
588 } else {
589 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
590 packet, status, errmsg);
591 }
592 }
593
594 /*
595 * get the next available buffer from dma queue
596 */
597 static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev,
598 struct em28xx_dmaqueue *dma_q)
599 {
600 struct em28xx_buffer *buf;
601
602 if (list_empty(&dma_q->active)) {
603 em28xx_isocdbg("No active queue to serve\n");
604 return NULL;
605 }
606
607 /* Get the next buffer */
608 buf = list_entry(dma_q->active.next, struct em28xx_buffer, list);
609 /* Cleans up buffer - Useful for testing for frame/URB loss */
610 list_del(&buf->list);
611 buf->pos = 0;
612 buf->vb_buf = buf->mem;
613
614 return buf;
615 }
616
617 /*
618 * Finish the current buffer if completed and prepare for the next field
619 */
620 static struct em28xx_buffer *
621 finish_field_prepare_next(struct em28xx *dev,
622 struct em28xx_buffer *buf,
623 struct em28xx_dmaqueue *dma_q)
624 {
625 struct em28xx_v4l2 *v4l2 = dev->v4l2;
626
627 if (v4l2->progressive || v4l2->top_field) { /* Brand new frame */
628 if (buf)
629 finish_buffer(dev, buf);
630 buf = get_next_buf(dev, dma_q);
631 }
632 if (buf) {
633 buf->top_field = v4l2->top_field;
634 buf->pos = 0;
635 }
636
637 return buf;
638 }
639
640 /*
641 * Process data packet according to the em2710/em2750/em28xx frame data format
642 */
643 static inline void process_frame_data_em28xx(struct em28xx *dev,
644 unsigned char *data_pkt,
645 unsigned int data_len)
646 {
647 struct em28xx_v4l2 *v4l2 = dev->v4l2;
648 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
649 struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf;
650 struct em28xx_dmaqueue *dma_q = &dev->vidq;
651 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
652
653 /*
654 * capture type 0 = vbi start
655 * capture type 1 = vbi in progress
656 * capture type 2 = video start
657 * capture type 3 = video in progress
658 */
659 if (data_len >= 4) {
660 /*
661 * NOTE: Headers are always 4 bytes and
662 * never split across packets
663 */
664 if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 &&
665 data_pkt[2] == 0x88 && data_pkt[3] == 0x88) {
666 /* Continuation */
667 data_pkt += 4;
668 data_len -= 4;
669 } else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) {
670 /* Field start (VBI mode) */
671 v4l2->capture_type = 0;
672 v4l2->vbi_read = 0;
673 em28xx_isocdbg("VBI START HEADER !!!\n");
674 v4l2->top_field = !(data_pkt[2] & 1);
675 data_pkt += 4;
676 data_len -= 4;
677 } else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) {
678 /* Field start (VBI disabled) */
679 v4l2->capture_type = 2;
680 em28xx_isocdbg("VIDEO START HEADER !!!\n");
681 v4l2->top_field = !(data_pkt[2] & 1);
682 data_pkt += 4;
683 data_len -= 4;
684 }
685 }
686 /*
687 * NOTE: With bulk transfers, intermediate data packets
688 * have no continuation header
689 */
690
691 if (v4l2->capture_type == 0) {
692 vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q);
693 dev->usb_ctl.vbi_buf = vbi_buf;
694 v4l2->capture_type = 1;
695 }
696
697 if (v4l2->capture_type == 1) {
698 int vbi_size = v4l2->vbi_width * v4l2->vbi_height;
699 int vbi_data_len = ((v4l2->vbi_read + data_len) > vbi_size) ?
700 (vbi_size - v4l2->vbi_read) : data_len;
701
702 /* Copy VBI data */
703 if (vbi_buf)
704 em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len);
705 v4l2->vbi_read += vbi_data_len;
706
707 if (vbi_data_len < data_len) {
708 /* Continue with copying video data */
709 v4l2->capture_type = 2;
710 data_pkt += vbi_data_len;
711 data_len -= vbi_data_len;
712 }
713 }
714
715 if (v4l2->capture_type == 2) {
716 buf = finish_field_prepare_next(dev, buf, dma_q);
717 dev->usb_ctl.vid_buf = buf;
718 v4l2->capture_type = 3;
719 }
720
721 if (v4l2->capture_type == 3 && buf && data_len > 0)
722 em28xx_copy_video(dev, buf, data_pkt, data_len);
723 }
724
725 /*
726 * Process data packet according to the em25xx/em276x/7x/8x frame data format
727 */
728 static inline void process_frame_data_em25xx(struct em28xx *dev,
729 unsigned char *data_pkt,
730 unsigned int data_len)
731 {
732 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
733 struct em28xx_dmaqueue *dmaq = &dev->vidq;
734 struct em28xx_v4l2 *v4l2 = dev->v4l2;
735 bool frame_end = false;
736
737 /* Check for header */
738 /*
739 * NOTE: at least with bulk transfers, only the first packet
740 * has a header and has always set the FRAME_END bit
741 */
742 if (data_len >= 2) { /* em25xx header is only 2 bytes long */
743 if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) &&
744 ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) {
745 v4l2->top_field = !(data_pkt[1] &
746 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID);
747 frame_end = data_pkt[1] &
748 EM25XX_FRMDATAHDR_BYTE2_FRAME_END;
749 data_pkt += 2;
750 data_len -= 2;
751 }
752
753 /* Finish field and prepare next (BULK only) */
754 if (dev->analog_xfer_bulk && frame_end) {
755 buf = finish_field_prepare_next(dev, buf, dmaq);
756 dev->usb_ctl.vid_buf = buf;
757 }
758 /*
759 * NOTE: in ISOC mode when a new frame starts and buf==NULL,
760 * we COULD already prepare a buffer here to avoid skipping the
761 * first frame.
762 */
763 }
764
765 /* Copy data */
766 if (buf && data_len > 0)
767 em28xx_copy_video(dev, buf, data_pkt, data_len);
768
769 /* Finish frame (ISOC only) => avoids lag of 1 frame */
770 if (!dev->analog_xfer_bulk && frame_end) {
771 buf = finish_field_prepare_next(dev, buf, dmaq);
772 dev->usb_ctl.vid_buf = buf;
773 }
774
775 /*
776 * NOTES:
777 *
778 * 1) Tested with USB bulk transfers only !
779 * The wording in the datasheet suggests that isoc might work different.
780 * The current code assumes that with isoc transfers each packet has a
781 * header like with the other em28xx devices.
782 *
783 * 2) Support for interlaced mode is pure theory. It has not been
784 * tested and it is unknown if these devices actually support it.
785 */
786 }
787
788 /* Processes and copies the URB data content (video and VBI data) */
789 static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb)
790 {
791 int xfer_bulk, num_packets, i;
792 unsigned char *usb_data_pkt;
793 unsigned int usb_data_len;
794
795 if (!dev)
796 return 0;
797
798 if (dev->disconnected)
799 return 0;
800
801 if (urb->status < 0)
802 print_err_status(dev, -1, urb->status);
803
804 xfer_bulk = usb_pipebulk(urb->pipe);
805
806 if (xfer_bulk) /* bulk */
807 num_packets = 1;
808 else /* isoc */
809 num_packets = urb->number_of_packets;
810
811 for (i = 0; i < num_packets; i++) {
812 if (xfer_bulk) { /* bulk */
813 usb_data_len = urb->actual_length;
814
815 usb_data_pkt = urb->transfer_buffer;
816 } else { /* isoc */
817 if (urb->iso_frame_desc[i].status < 0) {
818 print_err_status(dev, i,
819 urb->iso_frame_desc[i].status);
820 if (urb->iso_frame_desc[i].status != -EPROTO)
821 continue;
822 }
823
824 usb_data_len = urb->iso_frame_desc[i].actual_length;
825 if (usb_data_len > dev->max_pkt_size) {
826 em28xx_isocdbg("packet bigger than packet size");
827 continue;
828 }
829
830 usb_data_pkt = urb->transfer_buffer +
831 urb->iso_frame_desc[i].offset;
832 }
833
834 if (usb_data_len == 0) {
835 /* NOTE: happens very often with isoc transfers */
836 /* em28xx_usbdbg("packet %d is empty",i); - spammy */
837 continue;
838 }
839
840 if (dev->is_em25xx)
841 process_frame_data_em25xx(dev,
842 usb_data_pkt, usb_data_len);
843 else
844 process_frame_data_em28xx(dev,
845 usb_data_pkt, usb_data_len);
846 }
847 return 1;
848 }
849
850 static int get_resource(enum v4l2_buf_type f_type)
851 {
852 switch (f_type) {
853 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
854 return EM28XX_RESOURCE_VIDEO;
855 case V4L2_BUF_TYPE_VBI_CAPTURE:
856 return EM28XX_RESOURCE_VBI;
857 default:
858 WARN_ON(1);
859 return -1; /* Indicate that device is busy */
860 }
861 }
862
863 /* Usage lock check functions */
864 static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type)
865 {
866 int res_type = get_resource(f_type);
867
868 /* is it free? */
869 if (dev->resources & res_type) {
870 /* no, someone else uses it */
871 return -EBUSY;
872 }
873
874 /* it's free, grab it */
875 dev->resources |= res_type;
876 em28xx_videodbg("res: get %d\n", res_type);
877 return 0;
878 }
879
880 static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type)
881 {
882 int res_type = get_resource(f_type);
883
884 dev->resources &= ~res_type;
885 em28xx_videodbg("res: put %d\n", res_type);
886 }
887
888 static void em28xx_v4l2_media_release(struct em28xx *dev)
889 {
890 #ifdef CONFIG_MEDIA_CONTROLLER
891 int i;
892
893 for (i = 0; i < MAX_EM28XX_INPUT; i++) {
894 if (!INPUT(i)->type)
895 return;
896 media_device_unregister_entity(&dev->input_ent[i]);
897 }
898 #endif
899 }
900
901 /*
902 * Media Controller helper functions
903 */
904
905 static int em28xx_enable_analog_tuner(struct em28xx *dev)
906 {
907 #ifdef CONFIG_MEDIA_CONTROLLER
908 struct media_device *mdev = dev->media_dev;
909 struct em28xx_v4l2 *v4l2 = dev->v4l2;
910 struct media_entity *source;
911 struct media_link *link, *found_link = NULL;
912 int ret, active_links = 0;
913
914 if (!mdev || !v4l2->decoder)
915 return 0;
916
917 /*
918 * This will find the tuner that is connected into the decoder.
919 * Technically, this is not 100% correct, as the device may be
920 * using an analog input instead of the tuner. However, as we can't
921 * do DVB streaming while the DMA engine is being used for V4L2,
922 * this should be enough for the actual needs.
923 */
924 list_for_each_entry(link, &v4l2->decoder->links, list) {
925 if (link->sink->entity == v4l2->decoder) {
926 found_link = link;
927 if (link->flags & MEDIA_LNK_FL_ENABLED)
928 active_links++;
929 break;
930 }
931 }
932
933 if (active_links == 1 || !found_link)
934 return 0;
935
936 source = found_link->source->entity;
937 list_for_each_entry(link, &source->links, list) {
938 struct media_entity *sink;
939 int flags = 0;
940
941 sink = link->sink->entity;
942
943 if (sink == v4l2->decoder)
944 flags = MEDIA_LNK_FL_ENABLED;
945
946 ret = media_entity_setup_link(link, flags);
947 if (ret) {
948 dev_err(&dev->intf->dev,
949 "Couldn't change link %s->%s to %s. Error %d\n",
950 source->name, sink->name,
951 flags ? "enabled" : "disabled",
952 ret);
953 return ret;
954 }
955
956 em28xx_videodbg("link %s->%s was %s\n",
957 source->name, sink->name,
958 flags ? "ENABLED" : "disabled");
959 }
960 #endif
961 return 0;
962 }
963
964 static const char * const iname[] = {
965 [EM28XX_VMUX_COMPOSITE] = "Composite",
966 [EM28XX_VMUX_SVIDEO] = "S-Video",
967 [EM28XX_VMUX_TELEVISION] = "Television",
968 [EM28XX_RADIO] = "Radio",
969 };
970
971 static void em28xx_v4l2_create_entities(struct em28xx *dev)
972 {
973 #if defined(CONFIG_MEDIA_CONTROLLER)
974 struct em28xx_v4l2 *v4l2 = dev->v4l2;
975 int ret, i;
976
977 /* Initialize Video, VBI and Radio pads */
978 v4l2->video_pad.flags = MEDIA_PAD_FL_SINK;
979 ret = media_entity_pads_init(&v4l2->vdev.entity, 1, &v4l2->video_pad);
980 if (ret < 0)
981 dev_err(&dev->intf->dev,
982 "failed to initialize video media entity!\n");
983
984 if (em28xx_vbi_supported(dev)) {
985 v4l2->vbi_pad.flags = MEDIA_PAD_FL_SINK;
986 ret = media_entity_pads_init(&v4l2->vbi_dev.entity, 1,
987 &v4l2->vbi_pad);
988 if (ret < 0)
989 dev_err(&dev->intf->dev,
990 "failed to initialize vbi media entity!\n");
991 }
992
993 /* Webcams don't have input connectors */
994 if (dev->is_webcam)
995 return;
996
997 /* Create entities for each input connector */
998 for (i = 0; i < MAX_EM28XX_INPUT; i++) {
999 struct media_entity *ent = &dev->input_ent[i];
1000
1001 if (!INPUT(i)->type)
1002 break;
1003
1004 ent->name = iname[INPUT(i)->type];
1005 ent->flags = MEDIA_ENT_FL_CONNECTOR;
1006 dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;
1007
1008 switch (INPUT(i)->type) {
1009 case EM28XX_VMUX_COMPOSITE:
1010 ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
1011 break;
1012 case EM28XX_VMUX_SVIDEO:
1013 ent->function = MEDIA_ENT_F_CONN_SVIDEO;
1014 break;
1015 default: /* EM28XX_VMUX_TELEVISION or EM28XX_RADIO */
1016 if (dev->tuner_type != TUNER_ABSENT)
1017 ent->function = MEDIA_ENT_F_CONN_RF;
1018 break;
1019 }
1020
1021 ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
1022 if (ret < 0)
1023 dev_err(&dev->intf->dev,
1024 "failed to initialize input pad[%d]!\n", i);
1025
1026 ret = media_device_register_entity(dev->media_dev, ent);
1027 if (ret < 0)
1028 dev_err(&dev->intf->dev,
1029 "failed to register input entity %d!\n", i);
1030 }
1031 #endif
1032 }
1033
1034 /*
1035 * Videobuf2 operations
1036 */
1037
1038 static int queue_setup(struct vb2_queue *vq,
1039 unsigned int *nbuffers, unsigned int *nplanes,
1040 unsigned int sizes[], struct device *alloc_devs[])
1041 {
1042 struct em28xx *dev = vb2_get_drv_priv(vq);
1043 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1044 unsigned long size =
1045 (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;
1046
1047 if (*nplanes)
1048 return sizes[0] < size ? -EINVAL : 0;
1049 *nplanes = 1;
1050 sizes[0] = size;
1051
1052 em28xx_enable_analog_tuner(dev);
1053
1054 return 0;
1055 }
1056
1057 static int
1058 buffer_prepare(struct vb2_buffer *vb)
1059 {
1060 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1061 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
1062 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1063 unsigned long size;
1064
1065 em28xx_videodbg("%s, field=%d\n", __func__, vbuf->field);
1066
1067 size = (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;
1068
1069 if (vb2_plane_size(vb, 0) < size) {
1070 em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n",
1071 __func__, vb2_plane_size(vb, 0), size);
1072 return -EINVAL;
1073 }
1074 vb2_set_plane_payload(vb, 0, size);
1075
1076 return 0;
1077 }
1078
1079 int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
1080 {
1081 struct em28xx *dev = vb2_get_drv_priv(vq);
1082 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1083 struct v4l2_frequency f;
1084 struct v4l2_fh *owner;
1085 int rc = 0;
1086
1087 em28xx_videodbg("%s\n", __func__);
1088
1089 dev->v4l2->field_count = 0;
1090
1091 /*
1092 * Make sure streaming is not already in progress for this type
1093 * of filehandle (e.g. video, vbi)
1094 */
1095 rc = res_get(dev, vq->type);
1096 if (rc)
1097 return rc;
1098
1099 if (v4l2->streaming_users == 0) {
1100 /* First active streaming user, so allocate all the URBs */
1101
1102 /* Allocate the USB bandwidth */
1103 em28xx_set_alternate(dev);
1104
1105 /*
1106 * Needed, since GPIO might have disabled power of
1107 * some i2c device
1108 */
1109 em28xx_wake_i2c(dev);
1110
1111 v4l2->capture_type = -1;
1112 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE,
1113 dev->analog_xfer_bulk,
1114 EM28XX_NUM_BUFS,
1115 dev->max_pkt_size,
1116 dev->packet_multiplier,
1117 em28xx_urb_data_copy);
1118 if (rc < 0)
1119 return rc;
1120
1121 /*
1122 * djh: it's not clear whether this code is still needed. I'm
1123 * leaving it in here for now entirely out of concern for
1124 * backward compatibility (the old code did it)
1125 */
1126
1127 /* Ask tuner to go to analog or radio mode */
1128 memset(&f, 0, sizeof(f));
1129 f.frequency = v4l2->frequency;
1130 owner = (struct v4l2_fh *)vq->owner;
1131 if (owner && owner->vdev->vfl_type == VFL_TYPE_RADIO)
1132 f.type = V4L2_TUNER_RADIO;
1133 else
1134 f.type = V4L2_TUNER_ANALOG_TV;
1135 v4l2_device_call_all(&v4l2->v4l2_dev,
1136 0, tuner, s_frequency, &f);
1137
1138 /* Enable video stream at TV decoder */
1139 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 1);
1140 }
1141
1142 v4l2->streaming_users++;
1143
1144 return rc;
1145 }
1146
1147 static void em28xx_stop_streaming(struct vb2_queue *vq)
1148 {
1149 struct em28xx *dev = vb2_get_drv_priv(vq);
1150 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1151 struct em28xx_dmaqueue *vidq = &dev->vidq;
1152 unsigned long flags = 0;
1153
1154 em28xx_videodbg("%s\n", __func__);
1155
1156 res_free(dev, vq->type);
1157
1158 if (v4l2->streaming_users-- == 1) {
1159 /* Disable video stream at TV decoder */
1160 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0);
1161
1162 /* Last active user, so shutdown all the URBS */
1163 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1164 }
1165
1166 spin_lock_irqsave(&dev->slock, flags);
1167 if (dev->usb_ctl.vid_buf) {
1168 vb2_buffer_done(&dev->usb_ctl.vid_buf->vb.vb2_buf,
1169 VB2_BUF_STATE_ERROR);
1170 dev->usb_ctl.vid_buf = NULL;
1171 }
1172 while (!list_empty(&vidq->active)) {
1173 struct em28xx_buffer *buf;
1174
1175 buf = list_entry(vidq->active.next, struct em28xx_buffer, list);
1176 list_del(&buf->list);
1177 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1178 }
1179 spin_unlock_irqrestore(&dev->slock, flags);
1180 }
1181
1182 void em28xx_stop_vbi_streaming(struct vb2_queue *vq)
1183 {
1184 struct em28xx *dev = vb2_get_drv_priv(vq);
1185 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1186 struct em28xx_dmaqueue *vbiq = &dev->vbiq;
1187 unsigned long flags = 0;
1188
1189 em28xx_videodbg("%s\n", __func__);
1190
1191 res_free(dev, vq->type);
1192
1193 if (v4l2->streaming_users-- == 1) {
1194 /* Disable video stream at TV decoder */
1195 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0);
1196
1197 /* Last active user, so shutdown all the URBS */
1198 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1199 }
1200
1201 spin_lock_irqsave(&dev->slock, flags);
1202 if (dev->usb_ctl.vbi_buf) {
1203 vb2_buffer_done(&dev->usb_ctl.vbi_buf->vb.vb2_buf,
1204 VB2_BUF_STATE_ERROR);
1205 dev->usb_ctl.vbi_buf = NULL;
1206 }
1207 while (!list_empty(&vbiq->active)) {
1208 struct em28xx_buffer *buf;
1209
1210 buf = list_entry(vbiq->active.next, struct em28xx_buffer, list);
1211 list_del(&buf->list);
1212 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1213 }
1214 spin_unlock_irqrestore(&dev->slock, flags);
1215 }
1216
1217 static void
1218 buffer_queue(struct vb2_buffer *vb)
1219 {
1220 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1221 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
1222 struct em28xx_buffer *buf =
1223 container_of(vbuf, struct em28xx_buffer, vb);
1224 struct em28xx_dmaqueue *vidq = &dev->vidq;
1225 unsigned long flags = 0;
1226
1227 em28xx_videodbg("%s\n", __func__);
1228 buf->mem = vb2_plane_vaddr(vb, 0);
1229 buf->length = vb2_plane_size(vb, 0);
1230
1231 spin_lock_irqsave(&dev->slock, flags);
1232 list_add_tail(&buf->list, &vidq->active);
1233 spin_unlock_irqrestore(&dev->slock, flags);
1234 }
1235
1236 static const struct vb2_ops em28xx_video_qops = {
1237 .queue_setup = queue_setup,
1238 .buf_prepare = buffer_prepare,
1239 .buf_queue = buffer_queue,
1240 .start_streaming = em28xx_start_analog_streaming,
1241 .stop_streaming = em28xx_stop_streaming,
1242 .wait_prepare = vb2_ops_wait_prepare,
1243 .wait_finish = vb2_ops_wait_finish,
1244 };
1245
1246 static int em28xx_vb2_setup(struct em28xx *dev)
1247 {
1248 int rc;
1249 struct vb2_queue *q;
1250 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1251
1252 /* Setup Videobuf2 for Video capture */
1253 q = &v4l2->vb_vidq;
1254 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1255 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1256 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1257 q->drv_priv = dev;
1258 q->buf_struct_size = sizeof(struct em28xx_buffer);
1259 q->ops = &em28xx_video_qops;
1260 q->mem_ops = &vb2_vmalloc_memops;
1261
1262 rc = vb2_queue_init(q);
1263 if (rc < 0)
1264 return rc;
1265
1266 /* Setup Videobuf2 for VBI capture */
1267 q = &v4l2->vb_vbiq;
1268 q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1269 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
1270 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1271 q->drv_priv = dev;
1272 q->buf_struct_size = sizeof(struct em28xx_buffer);
1273 q->ops = &em28xx_vbi_qops;
1274 q->mem_ops = &vb2_vmalloc_memops;
1275
1276 rc = vb2_queue_init(q);
1277 if (rc < 0)
1278 return rc;
1279
1280 return 0;
1281 }
1282
1283 /*
1284 * v4l2 interface
1285 */
1286
1287 static void video_mux(struct em28xx *dev, int index)
1288 {
1289 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
1290
1291 dev->ctl_input = index;
1292 dev->ctl_ainput = INPUT(index)->amux;
1293 dev->ctl_aoutput = INPUT(index)->aout;
1294
1295 if (!dev->ctl_aoutput)
1296 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1297
1298 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
1299 INPUT(index)->vmux, 0, 0);
1300
1301 if (dev->has_msp34xx) {
1302 if (dev->i2s_speed) {
1303 v4l2_device_call_all(v4l2_dev, 0, audio,
1304 s_i2s_clock_freq, dev->i2s_speed);
1305 }
1306 /* Note: this is msp3400 specific */
1307 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1308 dev->ctl_ainput,
1309 MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
1310 }
1311
1312 if (dev->board.adecoder != EM28XX_NOADECODER) {
1313 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1314 dev->ctl_ainput, dev->ctl_aoutput, 0);
1315 }
1316
1317 em28xx_audio_analog_set(dev);
1318 }
1319
1320 static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv)
1321 {
1322 struct em28xx *dev = priv;
1323
1324 /*
1325 * In the case of non-AC97 volume controls, we still need
1326 * to do some setups at em28xx, in order to mute/unmute
1327 * and to adjust audio volume. However, the value ranges
1328 * should be checked by the corresponding V4L subdriver.
1329 */
1330 switch (ctrl->id) {
1331 case V4L2_CID_AUDIO_MUTE:
1332 dev->mute = ctrl->val;
1333 em28xx_audio_analog_set(dev);
1334 break;
1335 case V4L2_CID_AUDIO_VOLUME:
1336 dev->volume = ctrl->val;
1337 em28xx_audio_analog_set(dev);
1338 break;
1339 }
1340 }
1341
1342 static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl)
1343 {
1344 struct em28xx_v4l2 *v4l2 =
1345 container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler);
1346 struct em28xx *dev = v4l2->dev;
1347 int ret = -EINVAL;
1348
1349 switch (ctrl->id) {
1350 case V4L2_CID_AUDIO_MUTE:
1351 dev->mute = ctrl->val;
1352 ret = em28xx_audio_analog_set(dev);
1353 break;
1354 case V4L2_CID_AUDIO_VOLUME:
1355 dev->volume = ctrl->val;
1356 ret = em28xx_audio_analog_set(dev);
1357 break;
1358 case V4L2_CID_CONTRAST:
1359 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val);
1360 break;
1361 case V4L2_CID_BRIGHTNESS:
1362 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val);
1363 break;
1364 case V4L2_CID_SATURATION:
1365 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val);
1366 break;
1367 case V4L2_CID_BLUE_BALANCE:
1368 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val);
1369 break;
1370 case V4L2_CID_RED_BALANCE:
1371 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val);
1372 break;
1373 case V4L2_CID_SHARPNESS:
1374 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val);
1375 break;
1376 }
1377
1378 return (ret < 0) ? ret : 0;
1379 }
1380
1381 static const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
1382 .s_ctrl = em28xx_s_ctrl,
1383 };
1384
1385 static void size_to_scale(struct em28xx *dev,
1386 unsigned int width, unsigned int height,
1387 unsigned int *hscale, unsigned int *vscale)
1388 {
1389 unsigned int maxw = norm_maxw(dev);
1390 unsigned int maxh = norm_maxh(dev);
1391
1392 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1393 if (*hscale > EM28XX_HVSCALE_MAX)
1394 *hscale = EM28XX_HVSCALE_MAX;
1395
1396 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1397 if (*vscale > EM28XX_HVSCALE_MAX)
1398 *vscale = EM28XX_HVSCALE_MAX;
1399 }
1400
1401 static void scale_to_size(struct em28xx *dev,
1402 unsigned int hscale, unsigned int vscale,
1403 unsigned int *width, unsigned int *height)
1404 {
1405 unsigned int maxw = norm_maxw(dev);
1406 unsigned int maxh = norm_maxh(dev);
1407
1408 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1409 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1410
1411 /* Don't let width or height to be zero */
1412 if (*width < 1)
1413 *width = 1;
1414 if (*height < 1)
1415 *height = 1;
1416 }
1417
1418 /*
1419 * IOCTL vidioc handling
1420 */
1421
1422 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1423 struct v4l2_format *f)
1424 {
1425 struct em28xx *dev = video_drvdata(file);
1426 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1427
1428 f->fmt.pix.width = v4l2->width;
1429 f->fmt.pix.height = v4l2->height;
1430 f->fmt.pix.pixelformat = v4l2->format->fourcc;
1431 f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3;
1432 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height;
1433 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1434
1435 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1436 if (v4l2->progressive)
1437 f->fmt.pix.field = V4L2_FIELD_NONE;
1438 else
1439 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1440 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1441 return 0;
1442 }
1443
1444 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1445 {
1446 unsigned int i;
1447
1448 for (i = 0; i < ARRAY_SIZE(format); i++)
1449 if (format[i].fourcc == fourcc)
1450 return &format[i];
1451
1452 return NULL;
1453 }
1454
1455 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1456 struct v4l2_format *f)
1457 {
1458 struct em28xx *dev = video_drvdata(file);
1459 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1460 unsigned int width = f->fmt.pix.width;
1461 unsigned int height = f->fmt.pix.height;
1462 unsigned int maxw = norm_maxw(dev);
1463 unsigned int maxh = norm_maxh(dev);
1464 unsigned int hscale, vscale;
1465 struct em28xx_fmt *fmt;
1466
1467 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1468 if (!fmt) {
1469 fmt = &format[0];
1470 em28xx_videodbg("Fourcc format (%08x) invalid. Using default (%08x).\n",
1471 f->fmt.pix.pixelformat, fmt->fourcc);
1472 }
1473
1474 if (dev->board.is_em2800) {
1475 /* the em2800 can only scale down to 50% */
1476 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1477 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1478 /*
1479 * MaxPacketSize for em2800 is too small to capture at full
1480 * resolution use half of maxw as the scaler can only scale
1481 * to 50%
1482 */
1483 if (width == maxw && height == maxh)
1484 width /= 2;
1485 } else {
1486 /*
1487 * width must even because of the YUYV format
1488 * height must be even because of interlacing
1489 */
1490 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1491 1, 0);
1492 }
1493 /* Avoid division by zero at size_to_scale */
1494 if (width < 1)
1495 width = 1;
1496 if (height < 1)
1497 height = 1;
1498
1499 size_to_scale(dev, width, height, &hscale, &vscale);
1500 scale_to_size(dev, hscale, vscale, &width, &height);
1501
1502 f->fmt.pix.width = width;
1503 f->fmt.pix.height = height;
1504 f->fmt.pix.pixelformat = fmt->fourcc;
1505 f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
1506 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1507 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1508 if (v4l2->progressive)
1509 f->fmt.pix.field = V4L2_FIELD_NONE;
1510 else
1511 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1512 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1513
1514 return 0;
1515 }
1516
1517 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1518 unsigned int width, unsigned int height)
1519 {
1520 struct em28xx_fmt *fmt;
1521 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1522
1523 fmt = format_by_fourcc(fourcc);
1524 if (!fmt)
1525 return -EINVAL;
1526
1527 v4l2->format = fmt;
1528 v4l2->width = width;
1529 v4l2->height = height;
1530
1531 /* set new image size */
1532 size_to_scale(dev, v4l2->width, v4l2->height,
1533 &v4l2->hscale, &v4l2->vscale);
1534
1535 em28xx_resolution_set(dev);
1536
1537 return 0;
1538 }
1539
1540 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1541 struct v4l2_format *f)
1542 {
1543 struct em28xx *dev = video_drvdata(file);
1544 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1545
1546 if (vb2_is_busy(&v4l2->vb_vidq))
1547 return -EBUSY;
1548
1549 vidioc_try_fmt_vid_cap(file, priv, f);
1550
1551 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1552 f->fmt.pix.width, f->fmt.pix.height);
1553 }
1554
1555 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1556 {
1557 struct em28xx *dev = video_drvdata(file);
1558
1559 *norm = dev->v4l2->norm;
1560
1561 return 0;
1562 }
1563
1564 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
1565 {
1566 struct em28xx *dev = video_drvdata(file);
1567
1568 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm);
1569
1570 return 0;
1571 }
1572
1573 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
1574 {
1575 struct em28xx *dev = video_drvdata(file);
1576 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1577 struct v4l2_format f;
1578
1579 if (norm == v4l2->norm)
1580 return 0;
1581
1582 if (v4l2->streaming_users > 0)
1583 return -EBUSY;
1584
1585 v4l2->norm = norm;
1586
1587 /* Adjusts width/height, if needed */
1588 f.fmt.pix.width = 720;
1589 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576;
1590 vidioc_try_fmt_vid_cap(file, priv, &f);
1591
1592 /* set new image size */
1593 v4l2->width = f.fmt.pix.width;
1594 v4l2->height = f.fmt.pix.height;
1595 size_to_scale(dev, v4l2->width, v4l2->height,
1596 &v4l2->hscale, &v4l2->vscale);
1597
1598 em28xx_resolution_set(dev);
1599 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
1600
1601 return 0;
1602 }
1603
1604 static int vidioc_g_parm(struct file *file, void *priv,
1605 struct v4l2_streamparm *p)
1606 {
1607 struct v4l2_subdev_frame_interval ival = { 0 };
1608 struct em28xx *dev = video_drvdata(file);
1609 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1610 int rc = 0;
1611
1612 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1613 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1614 return -EINVAL;
1615
1616 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1617 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1618 if (dev->is_webcam) {
1619 rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0,
1620 video, g_frame_interval, &ival);
1621 if (!rc)
1622 p->parm.capture.timeperframe = ival.interval;
1623 } else {
1624 v4l2_video_std_frame_period(v4l2->norm,
1625 &p->parm.capture.timeperframe);
1626 }
1627
1628 return rc;
1629 }
1630
1631 static int vidioc_s_parm(struct file *file, void *priv,
1632 struct v4l2_streamparm *p)
1633 {
1634 struct em28xx *dev = video_drvdata(file);
1635 struct v4l2_subdev_frame_interval ival = {
1636 0,
1637 p->parm.capture.timeperframe
1638 };
1639 int rc = 0;
1640
1641 if (!dev->is_webcam)
1642 return -ENOTTY;
1643
1644 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1645 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1646 return -EINVAL;
1647
1648 memset(&p->parm, 0, sizeof(p->parm));
1649 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1650 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1651 rc = v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 0,
1652 video, s_frame_interval, &ival);
1653 if (!rc)
1654 p->parm.capture.timeperframe = ival.interval;
1655 return rc;
1656 }
1657
1658 static int vidioc_enum_input(struct file *file, void *priv,
1659 struct v4l2_input *i)
1660 {
1661 struct em28xx *dev = video_drvdata(file);
1662 unsigned int n;
1663 int j;
1664
1665 n = i->index;
1666 if (n >= MAX_EM28XX_INPUT)
1667 return -EINVAL;
1668 if (!INPUT(n)->type)
1669 return -EINVAL;
1670
1671 i->type = V4L2_INPUT_TYPE_CAMERA;
1672
1673 strscpy(i->name, iname[INPUT(n)->type], sizeof(i->name));
1674
1675 if (INPUT(n)->type == EM28XX_VMUX_TELEVISION)
1676 i->type = V4L2_INPUT_TYPE_TUNER;
1677
1678 i->std = dev->v4l2->vdev.tvnorms;
1679 /* webcams do not have the STD API */
1680 if (dev->is_webcam)
1681 i->capabilities = 0;
1682
1683 /* Dynamically generates an audioset bitmask */
1684 i->audioset = 0;
1685 for (j = 0; j < MAX_EM28XX_INPUT; j++)
1686 if (dev->amux_map[j] != EM28XX_AMUX_UNUSED)
1687 i->audioset |= 1 << j;
1688
1689 return 0;
1690 }
1691
1692 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1693 {
1694 struct em28xx *dev = video_drvdata(file);
1695
1696 *i = dev->ctl_input;
1697
1698 return 0;
1699 }
1700
1701 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1702 {
1703 struct em28xx *dev = video_drvdata(file);
1704
1705 if (i >= MAX_EM28XX_INPUT)
1706 return -EINVAL;
1707 if (!INPUT(i)->type)
1708 return -EINVAL;
1709
1710 video_mux(dev, i);
1711 return 0;
1712 }
1713
1714 static int em28xx_fill_audio_input(struct em28xx *dev,
1715 const char *s,
1716 struct v4l2_audio *a,
1717 unsigned int index)
1718 {
1719 unsigned int idx = dev->amux_map[index];
1720
1721 /*
1722 * With msp3400, almost all mappings use the default (amux = 0).
1723 * The only one may use a different value is WinTV USB2, where it
1724 * can also be SCART1 input.
1725 * As it is very doubtful that we would see new boards with msp3400,
1726 * let's just reuse the existing switch.
1727 */
1728 if (dev->has_msp34xx && idx != EM28XX_AMUX_UNUSED)
1729 idx = EM28XX_AMUX_LINE_IN;
1730
1731 switch (idx) {
1732 case EM28XX_AMUX_VIDEO:
1733 strscpy(a->name, "Television", sizeof(a->name));
1734 break;
1735 case EM28XX_AMUX_LINE_IN:
1736 strscpy(a->name, "Line In", sizeof(a->name));
1737 break;
1738 case EM28XX_AMUX_VIDEO2:
1739 strscpy(a->name, "Television alt", sizeof(a->name));
1740 break;
1741 case EM28XX_AMUX_PHONE:
1742 strscpy(a->name, "Phone", sizeof(a->name));
1743 break;
1744 case EM28XX_AMUX_MIC:
1745 strscpy(a->name, "Mic", sizeof(a->name));
1746 break;
1747 case EM28XX_AMUX_CD:
1748 strscpy(a->name, "CD", sizeof(a->name));
1749 break;
1750 case EM28XX_AMUX_AUX:
1751 strscpy(a->name, "Aux", sizeof(a->name));
1752 break;
1753 case EM28XX_AMUX_PCM_OUT:
1754 strscpy(a->name, "PCM", sizeof(a->name));
1755 break;
1756 case EM28XX_AMUX_UNUSED:
1757 default:
1758 return -EINVAL;
1759 }
1760 a->index = index;
1761 a->capability = V4L2_AUDCAP_STEREO;
1762
1763 em28xx_videodbg("%s: audio input index %d is '%s'\n",
1764 s, a->index, a->name);
1765
1766 return 0;
1767 }
1768
1769 static int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *a)
1770 {
1771 struct em28xx *dev = video_drvdata(file);
1772
1773 if (a->index >= MAX_EM28XX_INPUT)
1774 return -EINVAL;
1775
1776 return em28xx_fill_audio_input(dev, __func__, a, a->index);
1777 }
1778
1779 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1780 {
1781 struct em28xx *dev = video_drvdata(file);
1782 int i;
1783
1784 for (i = 0; i < MAX_EM28XX_INPUT; i++)
1785 if (dev->ctl_ainput == dev->amux_map[i])
1786 return em28xx_fill_audio_input(dev, __func__, a, i);
1787
1788 /* Should never happen! */
1789 return -EINVAL;
1790 }
1791
1792 static int vidioc_s_audio(struct file *file, void *priv,
1793 const struct v4l2_audio *a)
1794 {
1795 struct em28xx *dev = video_drvdata(file);
1796 int idx, i;
1797
1798 if (a->index >= MAX_EM28XX_INPUT)
1799 return -EINVAL;
1800
1801 idx = dev->amux_map[a->index];
1802
1803 if (idx == EM28XX_AMUX_UNUSED)
1804 return -EINVAL;
1805
1806 dev->ctl_ainput = idx;
1807
1808 /*
1809 * FIXME: This is wrong, as different inputs at em28xx_cards
1810 * may have different audio outputs. So, the right thing
1811 * to do is to implement VIDIOC_G_AUDOUT/VIDIOC_S_AUDOUT.
1812 * With the current board definitions, this would work fine,
1813 * as, currently, all boards fit.
1814 */
1815 for (i = 0; i < MAX_EM28XX_INPUT; i++)
1816 if (idx == dev->amux_map[i])
1817 break;
1818 if (i == MAX_EM28XX_INPUT)
1819 return -EINVAL;
1820
1821 dev->ctl_aoutput = INPUT(i)->aout;
1822
1823 if (!dev->ctl_aoutput)
1824 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1825
1826 em28xx_videodbg("%s: set audio input to %d\n", __func__,
1827 dev->ctl_ainput);
1828
1829 return 0;
1830 }
1831
1832 static int vidioc_g_tuner(struct file *file, void *priv,
1833 struct v4l2_tuner *t)
1834 {
1835 struct em28xx *dev = video_drvdata(file);
1836
1837 if (t->index != 0)
1838 return -EINVAL;
1839
1840 strscpy(t->name, "Tuner", sizeof(t->name));
1841
1842 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
1843 return 0;
1844 }
1845
1846 static int vidioc_s_tuner(struct file *file, void *priv,
1847 const struct v4l2_tuner *t)
1848 {
1849 struct em28xx *dev = video_drvdata(file);
1850
1851 if (t->index != 0)
1852 return -EINVAL;
1853
1854 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
1855 return 0;
1856 }
1857
1858 static int vidioc_g_frequency(struct file *file, void *priv,
1859 struct v4l2_frequency *f)
1860 {
1861 struct em28xx *dev = video_drvdata(file);
1862 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1863
1864 if (f->tuner != 0)
1865 return -EINVAL;
1866
1867 f->frequency = v4l2->frequency;
1868 return 0;
1869 }
1870
1871 static int vidioc_s_frequency(struct file *file, void *priv,
1872 const struct v4l2_frequency *f)
1873 {
1874 struct v4l2_frequency new_freq = *f;
1875 struct em28xx *dev = video_drvdata(file);
1876 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1877
1878 if (f->tuner != 0)
1879 return -EINVAL;
1880
1881 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f);
1882 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq);
1883 v4l2->frequency = new_freq.frequency;
1884
1885 return 0;
1886 }
1887
1888 #ifdef CONFIG_VIDEO_ADV_DEBUG
1889 static int vidioc_g_chip_info(struct file *file, void *priv,
1890 struct v4l2_dbg_chip_info *chip)
1891 {
1892 struct em28xx *dev = video_drvdata(file);
1893
1894 if (chip->match.addr > 1)
1895 return -EINVAL;
1896 if (chip->match.addr == 1)
1897 strscpy(chip->name, "ac97", sizeof(chip->name));
1898 else
1899 strscpy(chip->name,
1900 dev->v4l2->v4l2_dev.name, sizeof(chip->name));
1901 return 0;
1902 }
1903
1904 static int em28xx_reg_len(int reg)
1905 {
1906 switch (reg) {
1907 case EM28XX_R40_AC97LSB:
1908 case EM28XX_R30_HSCALELOW:
1909 case EM28XX_R32_VSCALELOW:
1910 return 2;
1911 default:
1912 return 1;
1913 }
1914 }
1915
1916 static int vidioc_g_register(struct file *file, void *priv,
1917 struct v4l2_dbg_register *reg)
1918 {
1919 struct em28xx *dev = video_drvdata(file);
1920 int ret;
1921
1922 if (reg->match.addr > 1)
1923 return -EINVAL;
1924 if (reg->match.addr) {
1925 ret = em28xx_read_ac97(dev, reg->reg);
1926 if (ret < 0)
1927 return ret;
1928
1929 reg->val = ret;
1930 reg->size = 1;
1931 return 0;
1932 }
1933
1934 /* Match host */
1935 reg->size = em28xx_reg_len(reg->reg);
1936 if (reg->size == 1) {
1937 ret = em28xx_read_reg(dev, reg->reg);
1938
1939 if (ret < 0)
1940 return ret;
1941
1942 reg->val = ret;
1943 } else {
1944 __le16 val = 0;
1945
1946 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1947 reg->reg, (char *)&val, 2);
1948 if (ret < 0)
1949 return ret;
1950
1951 reg->val = le16_to_cpu(val);
1952 }
1953
1954 return 0;
1955 }
1956
1957 static int vidioc_s_register(struct file *file, void *priv,
1958 const struct v4l2_dbg_register *reg)
1959 {
1960 struct em28xx *dev = video_drvdata(file);
1961 __le16 buf;
1962
1963 if (reg->match.addr > 1)
1964 return -EINVAL;
1965 if (reg->match.addr)
1966 return em28xx_write_ac97(dev, reg->reg, reg->val);
1967
1968 /* Match host */
1969 buf = cpu_to_le16(reg->val);
1970
1971 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1972 em28xx_reg_len(reg->reg));
1973 }
1974 #endif
1975
1976 static int vidioc_querycap(struct file *file, void *priv,
1977 struct v4l2_capability *cap)
1978 {
1979 struct em28xx *dev = video_drvdata(file);
1980 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1981 struct usb_device *udev = interface_to_usbdev(dev->intf);
1982
1983 strscpy(cap->driver, "em28xx", sizeof(cap->driver));
1984 strscpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1985 usb_make_path(udev, cap->bus_info, sizeof(cap->bus_info));
1986
1987 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_READWRITE |
1988 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1989 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
1990 cap->capabilities |= V4L2_CAP_AUDIO;
1991 if (dev->tuner_type != TUNER_ABSENT)
1992 cap->capabilities |= V4L2_CAP_TUNER;
1993 if (video_is_registered(&v4l2->vbi_dev))
1994 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1995 if (video_is_registered(&v4l2->radio_dev))
1996 cap->capabilities |= V4L2_CAP_RADIO;
1997 return 0;
1998 }
1999
2000 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
2001 struct v4l2_fmtdesc *f)
2002 {
2003 if (unlikely(f->index >= ARRAY_SIZE(format)))
2004 return -EINVAL;
2005
2006 f->pixelformat = format[f->index].fourcc;
2007
2008 return 0;
2009 }
2010
2011 static int vidioc_enum_framesizes(struct file *file, void *priv,
2012 struct v4l2_frmsizeenum *fsize)
2013 {
2014 struct em28xx *dev = video_drvdata(file);
2015 struct em28xx_fmt *fmt;
2016 unsigned int maxw = norm_maxw(dev);
2017 unsigned int maxh = norm_maxh(dev);
2018
2019 fmt = format_by_fourcc(fsize->pixel_format);
2020 if (!fmt) {
2021 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
2022 fsize->pixel_format);
2023 return -EINVAL;
2024 }
2025
2026 if (dev->board.is_em2800) {
2027 if (fsize->index > 1)
2028 return -EINVAL;
2029 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
2030 fsize->discrete.width = maxw / (1 + fsize->index);
2031 fsize->discrete.height = maxh / (1 + fsize->index);
2032 return 0;
2033 }
2034
2035 if (fsize->index != 0)
2036 return -EINVAL;
2037
2038 /* Report a continuous range */
2039 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
2040 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
2041 &fsize->stepwise.min_width, &fsize->stepwise.min_height);
2042 if (fsize->stepwise.min_width < 48)
2043 fsize->stepwise.min_width = 48;
2044 if (fsize->stepwise.min_height < 38)
2045 fsize->stepwise.min_height = 38;
2046 fsize->stepwise.max_width = maxw;
2047 fsize->stepwise.max_height = maxh;
2048 fsize->stepwise.step_width = 1;
2049 fsize->stepwise.step_height = 1;
2050 return 0;
2051 }
2052
2053 /* RAW VBI ioctls */
2054
2055 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
2056 struct v4l2_format *format)
2057 {
2058 struct em28xx *dev = video_drvdata(file);
2059 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2060
2061 format->fmt.vbi.samples_per_line = v4l2->vbi_width;
2062 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
2063 format->fmt.vbi.offset = 0;
2064 format->fmt.vbi.flags = 0;
2065 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
2066 format->fmt.vbi.count[0] = v4l2->vbi_height;
2067 format->fmt.vbi.count[1] = v4l2->vbi_height;
2068 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
2069
2070 /* Varies by video standard (NTSC, PAL, etc.) */
2071 if (v4l2->norm & V4L2_STD_525_60) {
2072 /* NTSC */
2073 format->fmt.vbi.start[0] = 10;
2074 format->fmt.vbi.start[1] = 273;
2075 } else if (v4l2->norm & V4L2_STD_625_50) {
2076 /* PAL */
2077 format->fmt.vbi.start[0] = 6;
2078 format->fmt.vbi.start[1] = 318;
2079 }
2080
2081 return 0;
2082 }
2083
2084 /*
2085 * RADIO ESPECIFIC IOCTLS
2086 */
2087
2088 static int radio_g_tuner(struct file *file, void *priv,
2089 struct v4l2_tuner *t)
2090 {
2091 struct em28xx *dev = video_drvdata(file);
2092
2093 if (unlikely(t->index > 0))
2094 return -EINVAL;
2095
2096 strscpy(t->name, "Radio", sizeof(t->name));
2097
2098 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
2099
2100 return 0;
2101 }
2102
2103 static int radio_s_tuner(struct file *file, void *priv,
2104 const struct v4l2_tuner *t)
2105 {
2106 struct em28xx *dev = video_drvdata(file);
2107
2108 if (t->index != 0)
2109 return -EINVAL;
2110
2111 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
2112
2113 return 0;
2114 }
2115
2116 /*
2117 * em28xx_free_v4l2() - Free struct em28xx_v4l2
2118 *
2119 * @ref: struct kref for struct em28xx_v4l2
2120 *
2121 * Called when all users of struct em28xx_v4l2 are gone
2122 */
2123 static void em28xx_free_v4l2(struct kref *ref)
2124 {
2125 struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref);
2126
2127 v4l2->dev->v4l2 = NULL;
2128 kfree(v4l2);
2129 }
2130
2131 /*
2132 * em28xx_v4l2_open()
2133 * inits the device and starts isoc transfer
2134 */
2135 static int em28xx_v4l2_open(struct file *filp)
2136 {
2137 struct video_device *vdev = video_devdata(filp);
2138 struct em28xx *dev = video_drvdata(filp);
2139 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2140 enum v4l2_buf_type fh_type = 0;
2141 int ret;
2142
2143 switch (vdev->vfl_type) {
2144 case VFL_TYPE_GRABBER:
2145 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2146 break;
2147 case VFL_TYPE_VBI:
2148 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2149 break;
2150 case VFL_TYPE_RADIO:
2151 break;
2152 default:
2153 return -EINVAL;
2154 }
2155
2156 em28xx_videodbg("open dev=%s type=%s users=%d\n",
2157 video_device_node_name(vdev), v4l2_type_names[fh_type],
2158 v4l2->users);
2159
2160 if (mutex_lock_interruptible(&dev->lock))
2161 return -ERESTARTSYS;
2162
2163 ret = v4l2_fh_open(filp);
2164 if (ret) {
2165 dev_err(&dev->intf->dev,
2166 "%s: v4l2_fh_open() returned error %d\n",
2167 __func__, ret);
2168 mutex_unlock(&dev->lock);
2169 return ret;
2170 }
2171
2172 if (v4l2->users == 0) {
2173 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2174
2175 if (vdev->vfl_type != VFL_TYPE_RADIO)
2176 em28xx_resolution_set(dev);
2177
2178 /*
2179 * Needed, since GPIO might have disabled power
2180 * of some i2c devices
2181 */
2182 em28xx_wake_i2c(dev);
2183 }
2184
2185 if (vdev->vfl_type == VFL_TYPE_RADIO) {
2186 em28xx_videodbg("video_open: setting radio device\n");
2187 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio);
2188 }
2189
2190 kref_get(&dev->ref);
2191 kref_get(&v4l2->ref);
2192 v4l2->users++;
2193
2194 mutex_unlock(&dev->lock);
2195
2196 return 0;
2197 }
2198
2199 /*
2200 * em28xx_v4l2_fini()
2201 * unregisters the v4l2,i2c and usb devices
2202 * called when the device gets disconnected or at module unload
2203 */
2204 static int em28xx_v4l2_fini(struct em28xx *dev)
2205 {
2206 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2207
2208 if (dev->is_audio_only) {
2209 /* Shouldn't initialize IR for this interface */
2210 return 0;
2211 }
2212
2213 if (!dev->has_video) {
2214 /* This device does not support the v4l2 extension */
2215 return 0;
2216 }
2217
2218 if (!v4l2)
2219 return 0;
2220
2221 dev_info(&dev->intf->dev, "Closing video extension\n");
2222
2223 mutex_lock(&dev->lock);
2224
2225 v4l2_device_disconnect(&v4l2->v4l2_dev);
2226
2227 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
2228
2229 em28xx_v4l2_media_release(dev);
2230
2231 if (video_is_registered(&v4l2->radio_dev)) {
2232 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2233 video_device_node_name(&v4l2->radio_dev));
2234 video_unregister_device(&v4l2->radio_dev);
2235 }
2236 if (video_is_registered(&v4l2->vbi_dev)) {
2237 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2238 video_device_node_name(&v4l2->vbi_dev));
2239 video_unregister_device(&v4l2->vbi_dev);
2240 }
2241 if (video_is_registered(&v4l2->vdev)) {
2242 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2243 video_device_node_name(&v4l2->vdev));
2244 video_unregister_device(&v4l2->vdev);
2245 }
2246
2247 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2248 v4l2_device_unregister(&v4l2->v4l2_dev);
2249
2250 kref_put(&v4l2->ref, em28xx_free_v4l2);
2251
2252 mutex_unlock(&dev->lock);
2253
2254 kref_put(&dev->ref, em28xx_free_device);
2255
2256 return 0;
2257 }
2258
2259 static int em28xx_v4l2_suspend(struct em28xx *dev)
2260 {
2261 if (dev->is_audio_only)
2262 return 0;
2263
2264 if (!dev->has_video)
2265 return 0;
2266
2267 dev_info(&dev->intf->dev, "Suspending video extension\n");
2268 em28xx_stop_urbs(dev);
2269 return 0;
2270 }
2271
2272 static int em28xx_v4l2_resume(struct em28xx *dev)
2273 {
2274 if (dev->is_audio_only)
2275 return 0;
2276
2277 if (!dev->has_video)
2278 return 0;
2279
2280 dev_info(&dev->intf->dev, "Resuming video extension\n");
2281 /* what do we do here */
2282 return 0;
2283 }
2284
2285 /*
2286 * em28xx_v4l2_close()
2287 * stops streaming and deallocates all resources allocated by the v4l2
2288 * calls and ioctls
2289 */
2290 static int em28xx_v4l2_close(struct file *filp)
2291 {
2292 struct em28xx *dev = video_drvdata(filp);
2293 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2294 struct usb_device *udev = interface_to_usbdev(dev->intf);
2295 int err;
2296
2297 em28xx_videodbg("users=%d\n", v4l2->users);
2298
2299 vb2_fop_release(filp);
2300 mutex_lock(&dev->lock);
2301
2302 if (v4l2->users == 1) {
2303 /* No sense to try to write to the device */
2304 if (dev->disconnected)
2305 goto exit;
2306
2307 /* Save some power by putting tuner to sleep */
2308 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2309
2310 /* do this before setting alternate! */
2311 em28xx_set_mode(dev, EM28XX_SUSPEND);
2312
2313 /* set alternate 0 */
2314 dev->alt = 0;
2315 em28xx_videodbg("setting alternate 0\n");
2316 err = usb_set_interface(udev, 0, 0);
2317 if (err < 0) {
2318 dev_err(&dev->intf->dev,
2319 "cannot change alternate number to 0 (error=%i)\n",
2320 err);
2321 }
2322 }
2323
2324 exit:
2325 v4l2->users--;
2326 kref_put(&v4l2->ref, em28xx_free_v4l2);
2327 mutex_unlock(&dev->lock);
2328 kref_put(&dev->ref, em28xx_free_device);
2329
2330 return 0;
2331 }
2332
2333 static const struct v4l2_file_operations em28xx_v4l_fops = {
2334 .owner = THIS_MODULE,
2335 .open = em28xx_v4l2_open,
2336 .release = em28xx_v4l2_close,
2337 .read = vb2_fop_read,
2338 .poll = vb2_fop_poll,
2339 .mmap = vb2_fop_mmap,
2340 .unlocked_ioctl = video_ioctl2,
2341 };
2342
2343 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2344 .vidioc_querycap = vidioc_querycap,
2345 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2346 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2347 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2348 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
2349 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2350 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2351 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2352 .vidioc_enum_framesizes = vidioc_enum_framesizes,
2353 .vidioc_enumaudio = vidioc_enumaudio,
2354 .vidioc_g_audio = vidioc_g_audio,
2355 .vidioc_s_audio = vidioc_s_audio,
2356
2357 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2358 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2359 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
2360 .vidioc_querybuf = vb2_ioctl_querybuf,
2361 .vidioc_qbuf = vb2_ioctl_qbuf,
2362 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2363
2364 .vidioc_g_std = vidioc_g_std,
2365 .vidioc_querystd = vidioc_querystd,
2366 .vidioc_s_std = vidioc_s_std,
2367 .vidioc_g_parm = vidioc_g_parm,
2368 .vidioc_s_parm = vidioc_s_parm,
2369 .vidioc_enum_input = vidioc_enum_input,
2370 .vidioc_g_input = vidioc_g_input,
2371 .vidioc_s_input = vidioc_s_input,
2372 .vidioc_streamon = vb2_ioctl_streamon,
2373 .vidioc_streamoff = vb2_ioctl_streamoff,
2374 .vidioc_g_tuner = vidioc_g_tuner,
2375 .vidioc_s_tuner = vidioc_s_tuner,
2376 .vidioc_g_frequency = vidioc_g_frequency,
2377 .vidioc_s_frequency = vidioc_s_frequency,
2378 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2379 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2380 #ifdef CONFIG_VIDEO_ADV_DEBUG
2381 .vidioc_g_chip_info = vidioc_g_chip_info,
2382 .vidioc_g_register = vidioc_g_register,
2383 .vidioc_s_register = vidioc_s_register,
2384 #endif
2385 };
2386
2387 static const struct video_device em28xx_video_template = {
2388 .fops = &em28xx_v4l_fops,
2389 .ioctl_ops = &video_ioctl_ops,
2390 .release = video_device_release_empty,
2391 .tvnorms = V4L2_STD_ALL,
2392 };
2393
2394 static const struct v4l2_file_operations radio_fops = {
2395 .owner = THIS_MODULE,
2396 .open = em28xx_v4l2_open,
2397 .release = em28xx_v4l2_close,
2398 .unlocked_ioctl = video_ioctl2,
2399 };
2400
2401 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2402 .vidioc_querycap = vidioc_querycap,
2403 .vidioc_g_tuner = radio_g_tuner,
2404 .vidioc_s_tuner = radio_s_tuner,
2405 .vidioc_g_frequency = vidioc_g_frequency,
2406 .vidioc_s_frequency = vidioc_s_frequency,
2407 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2408 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2409 #ifdef CONFIG_VIDEO_ADV_DEBUG
2410 .vidioc_g_chip_info = vidioc_g_chip_info,
2411 .vidioc_g_register = vidioc_g_register,
2412 .vidioc_s_register = vidioc_s_register,
2413 #endif
2414 };
2415
2416 static struct video_device em28xx_radio_template = {
2417 .fops = &radio_fops,
2418 .ioctl_ops = &radio_ioctl_ops,
2419 .release = video_device_release_empty,
2420 };
2421
2422 /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */
2423 static unsigned short saa711x_addrs[] = {
2424 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */
2425 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */
2426 I2C_CLIENT_END };
2427
2428 static unsigned short tvp5150_addrs[] = {
2429 0xb8 >> 1,
2430 0xba >> 1,
2431 I2C_CLIENT_END
2432 };
2433
2434 static unsigned short msp3400_addrs[] = {
2435 0x80 >> 1,
2436 0x88 >> 1,
2437 I2C_CLIENT_END
2438 };
2439
2440 /******************************** usb interface ******************************/
2441
2442 static void em28xx_vdev_init(struct em28xx *dev,
2443 struct video_device *vfd,
2444 const struct video_device *template,
2445 const char *type_name)
2446 {
2447 *vfd = *template;
2448 vfd->v4l2_dev = &dev->v4l2->v4l2_dev;
2449 vfd->lock = &dev->lock;
2450 if (dev->is_webcam)
2451 vfd->tvnorms = 0;
2452
2453 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2454 dev_name(&dev->intf->dev), type_name);
2455
2456 video_set_drvdata(vfd, dev);
2457 }
2458
2459 static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr)
2460 {
2461 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2462 struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev;
2463 struct tuner_setup tun_setup;
2464 struct v4l2_frequency f;
2465
2466 memset(&tun_setup, 0, sizeof(tun_setup));
2467
2468 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
2469 tun_setup.tuner_callback = em28xx_tuner_callback;
2470
2471 if (dev->board.radio.type) {
2472 tun_setup.type = dev->board.radio.type;
2473 tun_setup.addr = dev->board.radio_addr;
2474
2475 v4l2_device_call_all(v4l2_dev,
2476 0, tuner, s_type_addr, &tun_setup);
2477 }
2478
2479 if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type) {
2480 tun_setup.type = dev->tuner_type;
2481 tun_setup.addr = tuner_addr;
2482
2483 v4l2_device_call_all(v4l2_dev,
2484 0, tuner, s_type_addr, &tun_setup);
2485 }
2486
2487 if (dev->board.tda9887_conf) {
2488 struct v4l2_priv_tun_config tda9887_cfg;
2489
2490 tda9887_cfg.tuner = TUNER_TDA9887;
2491 tda9887_cfg.priv = &dev->board.tda9887_conf;
2492
2493 v4l2_device_call_all(v4l2_dev,
2494 0, tuner, s_config, &tda9887_cfg);
2495 }
2496
2497 if (dev->tuner_type == TUNER_XC2028) {
2498 struct v4l2_priv_tun_config xc2028_cfg;
2499 struct xc2028_ctrl ctl;
2500
2501 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg));
2502 memset(&ctl, 0, sizeof(ctl));
2503
2504 em28xx_setup_xc3028(dev, &ctl);
2505
2506 xc2028_cfg.tuner = TUNER_XC2028;
2507 xc2028_cfg.priv = &ctl;
2508
2509 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg);
2510 }
2511
2512 /* configure tuner */
2513 f.tuner = 0;
2514 f.type = V4L2_TUNER_ANALOG_TV;
2515 f.frequency = 9076; /* just a magic number */
2516 v4l2->frequency = f.frequency;
2517 v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f);
2518 }
2519
2520 static int em28xx_v4l2_init(struct em28xx *dev)
2521 {
2522 u8 val;
2523 int ret;
2524 unsigned int maxw;
2525 struct v4l2_ctrl_handler *hdl;
2526 struct em28xx_v4l2 *v4l2;
2527
2528 if (dev->is_audio_only) {
2529 /* Shouldn't initialize IR for this interface */
2530 return 0;
2531 }
2532
2533 if (!dev->has_video) {
2534 /* This device does not support the v4l2 extension */
2535 return 0;
2536 }
2537
2538 dev_info(&dev->intf->dev, "Registering V4L2 extension\n");
2539
2540 mutex_lock(&dev->lock);
2541
2542 v4l2 = kzalloc(sizeof(*v4l2), GFP_KERNEL);
2543 if (!v4l2) {
2544 mutex_unlock(&dev->lock);
2545 return -ENOMEM;
2546 }
2547 kref_init(&v4l2->ref);
2548 v4l2->dev = dev;
2549 dev->v4l2 = v4l2;
2550
2551 #ifdef CONFIG_MEDIA_CONTROLLER
2552 v4l2->v4l2_dev.mdev = dev->media_dev;
2553 #endif
2554 ret = v4l2_device_register(&dev->intf->dev, &v4l2->v4l2_dev);
2555 if (ret < 0) {
2556 dev_err(&dev->intf->dev,
2557 "Call to v4l2_device_register() failed!\n");
2558 goto err;
2559 }
2560
2561 hdl = &v4l2->ctrl_handler;
2562 v4l2_ctrl_handler_init(hdl, 8);
2563 v4l2->v4l2_dev.ctrl_handler = hdl;
2564
2565 if (dev->is_webcam)
2566 v4l2->progressive = true;
2567
2568 /*
2569 * Default format, used for tvp5150 or saa711x output formats
2570 */
2571 v4l2->vinmode = EM28XX_VINMODE_YUV422_CbYCrY;
2572 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED |
2573 EM28XX_VINCTRL_CCIR656_ENABLE;
2574
2575 /* request some modules */
2576
2577 if (dev->has_msp34xx)
2578 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2579 &dev->i2c_adap[dev->def_i2c_bus],
2580 "msp3400", 0, msp3400_addrs);
2581
2582 if (dev->board.decoder == EM28XX_SAA711X)
2583 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2584 &dev->i2c_adap[dev->def_i2c_bus],
2585 "saa7115_auto", 0, saa711x_addrs);
2586
2587 if (dev->board.decoder == EM28XX_TVP5150)
2588 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2589 &dev->i2c_adap[dev->def_i2c_bus],
2590 "tvp5150", 0, tvp5150_addrs);
2591
2592 if (dev->board.adecoder == EM28XX_TVAUDIO)
2593 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2594 &dev->i2c_adap[dev->def_i2c_bus],
2595 "tvaudio", dev->board.tvaudio_addr, NULL);
2596
2597 /* Initialize tuner and camera */
2598
2599 if (dev->board.tuner_type != TUNER_ABSENT) {
2600 unsigned short tuner_addr = dev->board.tuner_addr;
2601 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT);
2602
2603 if (dev->board.radio.type)
2604 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2605 &dev->i2c_adap[dev->def_i2c_bus],
2606 "tuner", dev->board.radio_addr,
2607 NULL);
2608
2609 if (has_demod)
2610 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2611 &dev->i2c_adap[dev->def_i2c_bus],
2612 "tuner", 0,
2613 v4l2_i2c_tuner_addrs(ADDRS_DEMOD));
2614 if (tuner_addr == 0) {
2615 enum v4l2_i2c_tuner_type type =
2616 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV;
2617 struct v4l2_subdev *sd;
2618
2619 sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2620 &dev->i2c_adap[dev->def_i2c_bus],
2621 "tuner", 0,
2622 v4l2_i2c_tuner_addrs(type));
2623
2624 if (sd)
2625 tuner_addr = v4l2_i2c_subdev_addr(sd);
2626 } else {
2627 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2628 &dev->i2c_adap[dev->def_i2c_bus],
2629 "tuner", tuner_addr, NULL);
2630 }
2631
2632 em28xx_tuner_setup(dev, tuner_addr);
2633 }
2634
2635 if (dev->em28xx_sensor != EM28XX_NOSENSOR)
2636 em28xx_init_camera(dev);
2637
2638 /* Configure audio */
2639 ret = em28xx_audio_setup(dev);
2640 if (ret < 0) {
2641 dev_err(&dev->intf->dev,
2642 "%s: Error while setting audio - error [%d]!\n",
2643 __func__, ret);
2644 goto unregister_dev;
2645 }
2646 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
2647 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2648 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
2649 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2650 V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f);
2651 } else {
2652 /* install the em28xx notify callback */
2653 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE),
2654 em28xx_ctrl_notify, dev);
2655 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME),
2656 em28xx_ctrl_notify, dev);
2657 }
2658
2659 /* wake i2c devices */
2660 em28xx_wake_i2c(dev);
2661
2662 /* init video dma queues */
2663 INIT_LIST_HEAD(&dev->vidq.active);
2664 INIT_LIST_HEAD(&dev->vbiq.active);
2665
2666 if (dev->has_msp34xx) {
2667 /* Send a reset to other chips via gpio */
2668 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7);
2669 if (ret < 0) {
2670 dev_err(&dev->intf->dev,
2671 "%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n",
2672 __func__, ret);
2673 goto unregister_dev;
2674 }
2675 usleep_range(10000, 11000);
2676
2677 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff);
2678 if (ret < 0) {
2679 dev_err(&dev->intf->dev,
2680 "%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n",
2681 __func__, ret);
2682 goto unregister_dev;
2683 }
2684 usleep_range(10000, 11000);
2685 }
2686
2687 /* set default norm */
2688 v4l2->norm = V4L2_STD_PAL;
2689 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
2690 v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT;
2691
2692 /* Analog specific initialization */
2693 v4l2->format = &format[0];
2694
2695 maxw = norm_maxw(dev);
2696 /*
2697 * MaxPacketSize for em2800 is too small to capture at full resolution
2698 * use half of maxw as the scaler can only scale to 50%
2699 */
2700 if (dev->board.is_em2800)
2701 maxw /= 2;
2702
2703 em28xx_set_video_format(dev, format[0].fourcc,
2704 maxw, norm_maxh(dev));
2705
2706 video_mux(dev, 0);
2707
2708 /* Audio defaults */
2709 dev->mute = 1;
2710 dev->volume = 0x1f;
2711
2712 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2713 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2714 em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2715 (EM28XX_XCLK_AUDIO_UNMUTE | val));
2716
2717 em28xx_set_outfmt(dev);
2718
2719 /* Add image controls */
2720
2721 /*
2722 * NOTE: at this point, the subdevices are already registered, so
2723 * bridge controls are only added/enabled when no subdevice provides
2724 * them
2725 */
2726 if (!v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST))
2727 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2728 V4L2_CID_CONTRAST,
2729 0, 0x1f, 1, CONTRAST_DEFAULT);
2730 if (!v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS))
2731 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2732 V4L2_CID_BRIGHTNESS,
2733 -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT);
2734 if (!v4l2_ctrl_find(hdl, V4L2_CID_SATURATION))
2735 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2736 V4L2_CID_SATURATION,
2737 0, 0x1f, 1, SATURATION_DEFAULT);
2738 if (!v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE))
2739 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2740 V4L2_CID_BLUE_BALANCE,
2741 -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT);
2742 if (!v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE))
2743 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2744 V4L2_CID_RED_BALANCE,
2745 -0x30, 0x30, 1, RED_BALANCE_DEFAULT);
2746 if (!v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS))
2747 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2748 V4L2_CID_SHARPNESS,
2749 0, 0x0f, 1, SHARPNESS_DEFAULT);
2750
2751 /* Reset image controls */
2752 em28xx_colorlevels_set_default(dev);
2753 v4l2_ctrl_handler_setup(hdl);
2754 ret = hdl->error;
2755 if (ret)
2756 goto unregister_dev;
2757
2758 /* allocate and fill video video_device struct */
2759 em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video");
2760 mutex_init(&v4l2->vb_queue_lock);
2761 mutex_init(&v4l2->vb_vbi_queue_lock);
2762 v4l2->vdev.queue = &v4l2->vb_vidq;
2763 v4l2->vdev.queue->lock = &v4l2->vb_queue_lock;
2764 v4l2->vdev.device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE |
2765 V4L2_CAP_STREAMING;
2766 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
2767 v4l2->vdev.device_caps |= V4L2_CAP_AUDIO;
2768 if (dev->tuner_type != TUNER_ABSENT)
2769 v4l2->vdev.device_caps |= V4L2_CAP_TUNER;
2770
2771
2772 /* disable inapplicable ioctls */
2773 if (dev->is_webcam) {
2774 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD);
2775 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD);
2776 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD);
2777 } else {
2778 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM);
2779 }
2780 if (dev->tuner_type == TUNER_ABSENT) {
2781 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER);
2782 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER);
2783 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY);
2784 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY);
2785 }
2786 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2787 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO);
2788 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO);
2789 }
2790
2791 /* register v4l2 video video_device */
2792 ret = video_register_device(&v4l2->vdev, VFL_TYPE_GRABBER,
2793 video_nr[dev->devno]);
2794 if (ret) {
2795 dev_err(&dev->intf->dev,
2796 "unable to register video device (error=%i).\n", ret);
2797 goto unregister_dev;
2798 }
2799
2800 /* Allocate and fill vbi video_device struct */
2801 if (em28xx_vbi_supported(dev) == 1) {
2802 em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template,
2803 "vbi");
2804
2805 v4l2->vbi_dev.queue = &v4l2->vb_vbiq;
2806 v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock;
2807 v4l2->vbi_dev.device_caps = V4L2_CAP_STREAMING |
2808 V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE;
2809 if (dev->tuner_type != TUNER_ABSENT)
2810 v4l2->vbi_dev.device_caps |= V4L2_CAP_TUNER;
2811
2812 /* disable inapplicable ioctls */
2813 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM);
2814 if (dev->tuner_type == TUNER_ABSENT) {
2815 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER);
2816 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER);
2817 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY);
2818 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY);
2819 }
2820 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2821 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO);
2822 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO);
2823 }
2824
2825 /* register v4l2 vbi video_device */
2826 ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI,
2827 vbi_nr[dev->devno]);
2828 if (ret < 0) {
2829 dev_err(&dev->intf->dev,
2830 "unable to register vbi device\n");
2831 goto unregister_dev;
2832 }
2833 }
2834
2835 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2836 em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template,
2837 "radio");
2838 v4l2->radio_dev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;
2839 ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO,
2840 radio_nr[dev->devno]);
2841 if (ret < 0) {
2842 dev_err(&dev->intf->dev,
2843 "can't register radio device\n");
2844 goto unregister_dev;
2845 }
2846 dev_info(&dev->intf->dev,
2847 "Registered radio device as %s\n",
2848 video_device_node_name(&v4l2->radio_dev));
2849 }
2850
2851 /* Init entities at the Media Controller */
2852 em28xx_v4l2_create_entities(dev);
2853
2854 #ifdef CONFIG_MEDIA_CONTROLLER
2855 ret = v4l2_mc_create_media_graph(dev->media_dev);
2856 if (ret) {
2857 dev_err(&dev->intf->dev,
2858 "failed to create media graph\n");
2859 em28xx_v4l2_media_release(dev);
2860 goto unregister_dev;
2861 }
2862 #endif
2863
2864 dev_info(&dev->intf->dev,
2865 "V4L2 video device registered as %s\n",
2866 video_device_node_name(&v4l2->vdev));
2867
2868 if (video_is_registered(&v4l2->vbi_dev))
2869 dev_info(&dev->intf->dev,
2870 "V4L2 VBI device registered as %s\n",
2871 video_device_node_name(&v4l2->vbi_dev));
2872
2873 /* Save some power by putting tuner to sleep */
2874 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2875
2876 /* initialize videobuf2 stuff */
2877 em28xx_vb2_setup(dev);
2878
2879 dev_info(&dev->intf->dev,
2880 "V4L2 extension successfully initialized\n");
2881
2882 kref_get(&dev->ref);
2883
2884 mutex_unlock(&dev->lock);
2885 return 0;
2886
2887 unregister_dev:
2888 if (video_is_registered(&v4l2->radio_dev)) {
2889 dev_info(&dev->intf->dev,
2890 "V4L2 device %s deregistered\n",
2891 video_device_node_name(&v4l2->radio_dev));
2892 video_unregister_device(&v4l2->radio_dev);
2893 }
2894 if (video_is_registered(&v4l2->vbi_dev)) {
2895 dev_info(&dev->intf->dev,
2896 "V4L2 device %s deregistered\n",
2897 video_device_node_name(&v4l2->vbi_dev));
2898 video_unregister_device(&v4l2->vbi_dev);
2899 }
2900 if (video_is_registered(&v4l2->vdev)) {
2901 dev_info(&dev->intf->dev,
2902 "V4L2 device %s deregistered\n",
2903 video_device_node_name(&v4l2->vdev));
2904 video_unregister_device(&v4l2->vdev);
2905 }
2906
2907 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2908 v4l2_device_unregister(&v4l2->v4l2_dev);
2909 err:
2910 dev->v4l2 = NULL;
2911 kref_put(&v4l2->ref, em28xx_free_v4l2);
2912 mutex_unlock(&dev->lock);
2913 return ret;
2914 }
2915
2916 static struct em28xx_ops v4l2_ops = {
2917 .id = EM28XX_V4L2,
2918 .name = "Em28xx v4l2 Extension",
2919 .init = em28xx_v4l2_init,
2920 .fini = em28xx_v4l2_fini,
2921 .suspend = em28xx_v4l2_suspend,
2922 .resume = em28xx_v4l2_resume,
2923 };
2924
2925 static int __init em28xx_video_register(void)
2926 {
2927 return em28xx_register_extension(&v4l2_ops);
2928 }
2929
2930 static void __exit em28xx_video_unregister(void)
2931 {
2932 em28xx_unregister_extension(&v4l2_ops);
2933 }
2934
2935 module_init(em28xx_video_register);
2936 module_exit(em28xx_video_unregister);
Linux with added FPC-III support