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perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / drivers / media / usb / em28xx / em28xx-video.c
blob68571bf36d28623cad6be5908f4f6075dd947df5
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 .name = "16 bpp YUY2, 4:2:2, packed",
106 .fourcc = V4L2_PIX_FMT_YUYV,
107 .depth = 16,
108 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V,
109 }, {
110 .name = "16 bpp RGB 565, LE",
111 .fourcc = V4L2_PIX_FMT_RGB565,
112 .depth = 16,
113 .reg = EM28XX_OUTFMT_RGB_16_656,
114 }, {
115 .name = "8 bpp Bayer RGRG..GBGB",
116 .fourcc = V4L2_PIX_FMT_SRGGB8,
117 .depth = 8,
118 .reg = EM28XX_OUTFMT_RGB_8_RGRG,
119 }, {
120 .name = "8 bpp Bayer BGBG..GRGR",
121 .fourcc = V4L2_PIX_FMT_SBGGR8,
122 .depth = 8,
123 .reg = EM28XX_OUTFMT_RGB_8_BGBG,
124 }, {
125 .name = "8 bpp Bayer GRGR..BGBG",
126 .fourcc = V4L2_PIX_FMT_SGRBG8,
127 .depth = 8,
128 .reg = EM28XX_OUTFMT_RGB_8_GRGR,
129 }, {
130 .name = "8 bpp Bayer GBGB..RGRG",
131 .fourcc = V4L2_PIX_FMT_SGBRG8,
132 .depth = 8,
133 .reg = EM28XX_OUTFMT_RGB_8_GBGB,
134 }, {
135 .name = "12 bpp YUV411",
136 .fourcc = V4L2_PIX_FMT_YUV411P,
137 .depth = 12,
138 .reg = EM28XX_OUTFMT_YUV411,
139 },
140 };
141
142 /*FIXME: maxw should be dependent of alt mode */
143 static inline unsigned int norm_maxw(struct em28xx *dev)
144 {
145 struct em28xx_v4l2 *v4l2 = dev->v4l2;
146
147 if (dev->is_webcam)
148 return v4l2->sensor_xres;
149
150 if (dev->board.max_range_640_480)
151 return 640;
152
153 return 720;
154 }
155
156 static inline unsigned int norm_maxh(struct em28xx *dev)
157 {
158 struct em28xx_v4l2 *v4l2 = dev->v4l2;
159
160 if (dev->is_webcam)
161 return v4l2->sensor_yres;
162
163 if (dev->board.max_range_640_480)
164 return 480;
165
166 return (v4l2->norm & V4L2_STD_625_50) ? 576 : 480;
167 }
168
169 static int em28xx_vbi_supported(struct em28xx *dev)
170 {
171 /* Modprobe option to manually disable */
172 if (disable_vbi == 1)
173 return 0;
174
175 if (dev->is_webcam)
176 return 0;
177
178 /* FIXME: check subdevices for VBI support */
179
180 if (dev->chip_id == CHIP_ID_EM2860 ||
181 dev->chip_id == CHIP_ID_EM2883)
182 return 1;
183
184 /* Version of em28xx that does not support VBI */
185 return 0;
186 }
187
188 /*
189 * em28xx_wake_i2c()
190 * configure i2c attached devices
191 */
192 static void em28xx_wake_i2c(struct em28xx *dev)
193 {
194 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
195
196 v4l2_device_call_all(v4l2_dev, 0, core, reset, 0);
197 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
198 INPUT(dev->ctl_input)->vmux, 0, 0);
199 }
200
201 static int em28xx_colorlevels_set_default(struct em28xx *dev)
202 {
203 em28xx_write_reg(dev, EM28XX_R20_YGAIN, CONTRAST_DEFAULT);
204 em28xx_write_reg(dev, EM28XX_R21_YOFFSET, BRIGHTNESS_DEFAULT);
205 em28xx_write_reg(dev, EM28XX_R22_UVGAIN, SATURATION_DEFAULT);
206 em28xx_write_reg(dev, EM28XX_R23_UOFFSET, BLUE_BALANCE_DEFAULT);
207 em28xx_write_reg(dev, EM28XX_R24_VOFFSET, RED_BALANCE_DEFAULT);
208 em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, SHARPNESS_DEFAULT);
209
210 em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20);
211 em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20);
212 em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20);
213 em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20);
214 em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00);
215 em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00);
216 return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00);
217 }
218
219 static int em28xx_set_outfmt(struct em28xx *dev)
220 {
221 int ret;
222 u8 fmt, vinctrl;
223 struct em28xx_v4l2 *v4l2 = dev->v4l2;
224
225 fmt = v4l2->format->reg;
226 if (!dev->is_em25xx)
227 fmt |= 0x20;
228 /*
229 * NOTE: it's not clear if this is really needed !
230 * The datasheets say bit 5 is a reserved bit and devices seem to work
231 * fine without it. But the Windows driver sets it for em2710/50+em28xx
232 * devices and we've always been setting it, too.
233 *
234 * em2765 (em25xx, em276x/7x/8x) devices do NOT work with this bit set,
235 * it's likely used for an additional (compressed ?) format there.
236 */
237 ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt);
238 if (ret < 0)
239 return ret;
240
241 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, v4l2->vinmode);
242 if (ret < 0)
243 return ret;
244
245 vinctrl = v4l2->vinctl;
246 if (em28xx_vbi_supported(dev) == 1) {
247 vinctrl |= EM28XX_VINCTRL_VBI_RAW;
248 em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00);
249 em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH,
250 v4l2->vbi_width / 4);
251 em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, v4l2->vbi_height);
252 if (v4l2->norm & V4L2_STD_525_60) {
253 /* NTSC */
254 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09);
255 } else if (v4l2->norm & V4L2_STD_625_50) {
256 /* PAL */
257 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07);
258 }
259 }
260
261 return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl);
262 }
263
264 static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax,
265 u8 ymin, u8 ymax)
266 {
267 em28xx_videodbg("em28xx Scale: (%d,%d)-(%d,%d)\n",
268 xmin, ymin, xmax, ymax);
269
270 em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1);
271 em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1);
272 em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1);
273 return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1);
274 }
275
276 static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart,
277 u16 width, u16 height)
278 {
279 u8 cwidth = width >> 2;
280 u8 cheight = height >> 2;
281 u8 overflow = (height >> 9 & 0x02) | (width >> 10 & 0x01);
282 /* NOTE: size limit: 2047x1023 = 2MPix */
283
284 em28xx_videodbg("capture area set to (%d,%d): %dx%d\n",
285 hstart, vstart,
286 ((overflow & 2) << 9 | cwidth << 2),
287 ((overflow & 1) << 10 | cheight << 2));
288
289 em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1);
290 em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1);
291 em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1);
292 em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1);
293 em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1);
294
295 /* FIXME: function/meaning of these registers ? */
296 /* FIXME: align width+height to multiples of 4 ?! */
297 if (dev->is_em25xx) {
298 em28xx_write_reg(dev, 0x34, width >> 4);
299 em28xx_write_reg(dev, 0x35, height >> 4);
300 }
301 }
302
303 static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v)
304 {
305 u8 mode = 0x00;
306 /* the em2800 scaler only supports scaling down to 50% */
307
308 if (dev->board.is_em2800) {
309 mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00);
310 } else {
311 u8 buf[2];
312
313 buf[0] = h;
314 buf[1] = h >> 8;
315 em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2);
316
317 buf[0] = v;
318 buf[1] = v >> 8;
319 em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2);
320 /*
321 * it seems that both H and V scalers must be active
322 * to work correctly
323 */
324 mode = (h || v) ? 0x30 : 0x00;
325 }
326 return em28xx_write_reg(dev, EM28XX_R26_COMPR, mode);
327 }
328
329 /* FIXME: this only function read values from dev */
330 static int em28xx_resolution_set(struct em28xx *dev)
331 {
332 struct em28xx_v4l2 *v4l2 = dev->v4l2;
333 int width = norm_maxw(dev);
334 int height = norm_maxh(dev);
335
336 /* Properly setup VBI */
337 v4l2->vbi_width = 720;
338 if (v4l2->norm & V4L2_STD_525_60)
339 v4l2->vbi_height = 12;
340 else
341 v4l2->vbi_height = 18;
342
343 em28xx_set_outfmt(dev);
344
345 em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2);
346
347 /*
348 * If we don't set the start position to 2 in VBI mode, we end up
349 * with line 20/21 being YUYV encoded instead of being in 8-bit
350 * greyscale. The core of the issue is that line 21 (and line 23 for
351 * PAL WSS) are inside of active video region, and as a result they
352 * get the pixelformatting associated with that area. So by cropping
353 * it out, we end up with the same format as the rest of the VBI
354 * region
355 */
356 if (em28xx_vbi_supported(dev) == 1)
357 em28xx_capture_area_set(dev, 0, 2, width, height);
358 else
359 em28xx_capture_area_set(dev, 0, 0, width, height);
360
361 return em28xx_scaler_set(dev, v4l2->hscale, v4l2->vscale);
362 }
363
364 /* Set USB alternate setting for analog video */
365 static int em28xx_set_alternate(struct em28xx *dev)
366 {
367 struct em28xx_v4l2 *v4l2 = dev->v4l2;
368 struct usb_device *udev = interface_to_usbdev(dev->intf);
369 int err;
370 int i;
371 unsigned int min_pkt_size = v4l2->width * 2 + 4;
372
373 /*
374 * NOTE: for isoc transfers, only alt settings > 0 are allowed
375 * bulk transfers seem to work only with alt=0 !
376 */
377 dev->alt = 0;
378 if (alt > 0 && alt < dev->num_alt) {
379 em28xx_videodbg("alternate forced to %d\n", dev->alt);
380 dev->alt = alt;
381 goto set_alt;
382 }
383 if (dev->analog_xfer_bulk)
384 goto set_alt;
385
386 /*
387 * When image size is bigger than a certain value,
388 * the frame size should be increased, otherwise, only
389 * green screen will be received.
390 */
391 if (v4l2->width * 2 * v4l2->height > 720 * 240 * 2)
392 min_pkt_size *= 2;
393
394 for (i = 0; i < dev->num_alt; i++) {
395 /* stop when the selected alt setting offers enough bandwidth */
396 if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) {
397 dev->alt = i;
398 break;
399 /*
400 * otherwise make sure that we end up with the maximum
401 * bandwidth because the min_pkt_size equation might be wrong.
402 *
403 */
404 } else if (dev->alt_max_pkt_size_isoc[i] >
405 dev->alt_max_pkt_size_isoc[dev->alt])
406 dev->alt = i;
407 }
408
409 set_alt:
410 /*
411 * NOTE: for bulk transfers, we need to call usb_set_interface()
412 * even if the previous settings were the same. Otherwise streaming
413 * fails with all urbs having status = -EOVERFLOW !
414 */
415 if (dev->analog_xfer_bulk) {
416 dev->max_pkt_size = 512; /* USB 2.0 spec */
417 dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER;
418 } else { /* isoc */
419 em28xx_videodbg("minimum isoc packet size: %u (alt=%d)\n",
420 min_pkt_size, dev->alt);
421 dev->max_pkt_size =
422 dev->alt_max_pkt_size_isoc[dev->alt];
423 dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS;
424 }
425 em28xx_videodbg("setting alternate %d with wMaxPacketSize=%u\n",
426 dev->alt, dev->max_pkt_size);
427 err = usb_set_interface(udev, dev->ifnum, dev->alt);
428 if (err < 0) {
429 dev_err(&dev->intf->dev,
430 "cannot change alternate number to %d (error=%i)\n",
431 dev->alt, err);
432 return err;
433 }
434 return 0;
435 }
436
437 /*
438 * DMA and thread functions
439 */
440
441 /*
442 * Finish the current buffer
443 */
444 static inline void finish_buffer(struct em28xx *dev,
445 struct em28xx_buffer *buf)
446 {
447 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
448
449 buf->vb.sequence = dev->v4l2->field_count++;
450 if (dev->v4l2->progressive)
451 buf->vb.field = V4L2_FIELD_NONE;
452 else
453 buf->vb.field = V4L2_FIELD_INTERLACED;
454 buf->vb.vb2_buf.timestamp = ktime_get_ns();
455
456 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
457 }
458
459 /*
460 * Copy picture data from USB buffer to videobuf buffer
461 */
462 static void em28xx_copy_video(struct em28xx *dev,
463 struct em28xx_buffer *buf,
464 unsigned char *usb_buf,
465 unsigned long len)
466 {
467 struct em28xx_v4l2 *v4l2 = dev->v4l2;
468 void *fieldstart, *startwrite, *startread;
469 int linesdone, currlinedone, offset, lencopy, remain;
470 int bytesperline = v4l2->width << 1;
471
472 if (buf->pos + len > buf->length)
473 len = buf->length - buf->pos;
474
475 startread = usb_buf;
476 remain = len;
477
478 if (v4l2->progressive || buf->top_field)
479 fieldstart = buf->vb_buf;
480 else /* interlaced mode, even nr. of lines */
481 fieldstart = buf->vb_buf + bytesperline;
482
483 linesdone = buf->pos / bytesperline;
484 currlinedone = buf->pos % bytesperline;
485
486 if (v4l2->progressive)
487 offset = linesdone * bytesperline + currlinedone;
488 else
489 offset = linesdone * bytesperline * 2 + currlinedone;
490
491 startwrite = fieldstart + offset;
492 lencopy = bytesperline - currlinedone;
493 lencopy = lencopy > remain ? remain : lencopy;
494
495 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) {
496 em28xx_isocdbg("Overflow of %zu bytes past buffer end (1)\n",
497 ((char *)startwrite + lencopy) -
498 ((char *)buf->vb_buf + buf->length));
499 remain = (char *)buf->vb_buf + buf->length -
500 (char *)startwrite;
501 lencopy = remain;
502 }
503 if (lencopy <= 0)
504 return;
505 memcpy(startwrite, startread, lencopy);
506
507 remain -= lencopy;
508
509 while (remain > 0) {
510 if (v4l2->progressive)
511 startwrite += lencopy;
512 else
513 startwrite += lencopy + bytesperline;
514 startread += lencopy;
515 if (bytesperline > remain)
516 lencopy = remain;
517 else
518 lencopy = bytesperline;
519
520 if ((char *)startwrite + lencopy > (char *)buf->vb_buf +
521 buf->length) {
522 em28xx_isocdbg("Overflow of %zu bytes past buffer end(2)\n",
523 ((char *)startwrite + lencopy) -
524 ((char *)buf->vb_buf + buf->length));
525 remain = (char *)buf->vb_buf + buf->length -
526 (char *)startwrite;
527 lencopy = remain;
528 }
529 if (lencopy <= 0)
530 break;
531
532 memcpy(startwrite, startread, lencopy);
533
534 remain -= lencopy;
535 }
536
537 buf->pos += len;
538 }
539
540 /*
541 * Copy VBI data from USB buffer to videobuf buffer
542 */
543 static void em28xx_copy_vbi(struct em28xx *dev,
544 struct em28xx_buffer *buf,
545 unsigned char *usb_buf,
546 unsigned long len)
547 {
548 unsigned int offset;
549
550 if (buf->pos + len > buf->length)
551 len = buf->length - buf->pos;
552
553 offset = buf->pos;
554 /* Make sure the bottom field populates the second half of the frame */
555 if (buf->top_field == 0)
556 offset += dev->v4l2->vbi_width * dev->v4l2->vbi_height;
557
558 memcpy(buf->vb_buf + offset, usb_buf, len);
559 buf->pos += len;
560 }
561
562 static inline void print_err_status(struct em28xx *dev,
563 int packet, int status)
564 {
565 char *errmsg = "Unknown";
566
567 switch (status) {
568 case -ENOENT:
569 errmsg = "unlinked synchronously";
570 break;
571 case -ECONNRESET:
572 errmsg = "unlinked asynchronously";
573 break;
574 case -ENOSR:
575 errmsg = "Buffer error (overrun)";
576 break;
577 case -EPIPE:
578 errmsg = "Stalled (device not responding)";
579 break;
580 case -EOVERFLOW:
581 errmsg = "Babble (bad cable?)";
582 break;
583 case -EPROTO:
584 errmsg = "Bit-stuff error (bad cable?)";
585 break;
586 case -EILSEQ:
587 errmsg = "CRC/Timeout (could be anything)";
588 break;
589 case -ETIME:
590 errmsg = "Device does not respond";
591 break;
592 }
593 if (packet < 0) {
594 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
595 } else {
596 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
597 packet, status, errmsg);
598 }
599 }
600
601 /*
602 * get the next available buffer from dma queue
603 */
604 static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev,
605 struct em28xx_dmaqueue *dma_q)
606 {
607 struct em28xx_buffer *buf;
608
609 if (list_empty(&dma_q->active)) {
610 em28xx_isocdbg("No active queue to serve\n");
611 return NULL;
612 }
613
614 /* Get the next buffer */
615 buf = list_entry(dma_q->active.next, struct em28xx_buffer, list);
616 /* Cleans up buffer - Useful for testing for frame/URB loss */
617 list_del(&buf->list);
618 buf->pos = 0;
619 buf->vb_buf = buf->mem;
620
621 return buf;
622 }
623
624 /*
625 * Finish the current buffer if completed and prepare for the next field
626 */
627 static struct em28xx_buffer *
628 finish_field_prepare_next(struct em28xx *dev,
629 struct em28xx_buffer *buf,
630 struct em28xx_dmaqueue *dma_q)
631 {
632 struct em28xx_v4l2 *v4l2 = dev->v4l2;
633
634 if (v4l2->progressive || v4l2->top_field) { /* Brand new frame */
635 if (buf)
636 finish_buffer(dev, buf);
637 buf = get_next_buf(dev, dma_q);
638 }
639 if (buf) {
640 buf->top_field = v4l2->top_field;
641 buf->pos = 0;
642 }
643
644 return buf;
645 }
646
647 /*
648 * Process data packet according to the em2710/em2750/em28xx frame data format
649 */
650 static inline void process_frame_data_em28xx(struct em28xx *dev,
651 unsigned char *data_pkt,
652 unsigned int data_len)
653 {
654 struct em28xx_v4l2 *v4l2 = dev->v4l2;
655 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
656 struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf;
657 struct em28xx_dmaqueue *dma_q = &dev->vidq;
658 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
659
660 /*
661 * capture type 0 = vbi start
662 * capture type 1 = vbi in progress
663 * capture type 2 = video start
664 * capture type 3 = video in progress
665 */
666 if (data_len >= 4) {
667 /*
668 * NOTE: Headers are always 4 bytes and
669 * never split across packets
670 */
671 if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 &&
672 data_pkt[2] == 0x88 && data_pkt[3] == 0x88) {
673 /* Continuation */
674 data_pkt += 4;
675 data_len -= 4;
676 } else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) {
677 /* Field start (VBI mode) */
678 v4l2->capture_type = 0;
679 v4l2->vbi_read = 0;
680 em28xx_isocdbg("VBI START HEADER !!!\n");
681 v4l2->top_field = !(data_pkt[2] & 1);
682 data_pkt += 4;
683 data_len -= 4;
684 } else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) {
685 /* Field start (VBI disabled) */
686 v4l2->capture_type = 2;
687 em28xx_isocdbg("VIDEO START HEADER !!!\n");
688 v4l2->top_field = !(data_pkt[2] & 1);
689 data_pkt += 4;
690 data_len -= 4;
691 }
692 }
693 /*
694 * NOTE: With bulk transfers, intermediate data packets
695 * have no continuation header
696 */
697
698 if (v4l2->capture_type == 0) {
699 vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q);
700 dev->usb_ctl.vbi_buf = vbi_buf;
701 v4l2->capture_type = 1;
702 }
703
704 if (v4l2->capture_type == 1) {
705 int vbi_size = v4l2->vbi_width * v4l2->vbi_height;
706 int vbi_data_len = ((v4l2->vbi_read + data_len) > vbi_size) ?
707 (vbi_size - v4l2->vbi_read) : data_len;
708
709 /* Copy VBI data */
710 if (vbi_buf)
711 em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len);
712 v4l2->vbi_read += vbi_data_len;
713
714 if (vbi_data_len < data_len) {
715 /* Continue with copying video data */
716 v4l2->capture_type = 2;
717 data_pkt += vbi_data_len;
718 data_len -= vbi_data_len;
719 }
720 }
721
722 if (v4l2->capture_type == 2) {
723 buf = finish_field_prepare_next(dev, buf, dma_q);
724 dev->usb_ctl.vid_buf = buf;
725 v4l2->capture_type = 3;
726 }
727
728 if (v4l2->capture_type == 3 && buf && data_len > 0)
729 em28xx_copy_video(dev, buf, data_pkt, data_len);
730 }
731
732 /*
733 * Process data packet according to the em25xx/em276x/7x/8x frame data format
734 */
735 static inline void process_frame_data_em25xx(struct em28xx *dev,
736 unsigned char *data_pkt,
737 unsigned int data_len)
738 {
739 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
740 struct em28xx_dmaqueue *dmaq = &dev->vidq;
741 struct em28xx_v4l2 *v4l2 = dev->v4l2;
742 bool frame_end = false;
743
744 /* Check for header */
745 /*
746 * NOTE: at least with bulk transfers, only the first packet
747 * has a header and has always set the FRAME_END bit
748 */
749 if (data_len >= 2) { /* em25xx header is only 2 bytes long */
750 if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) &&
751 ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) {
752 v4l2->top_field = !(data_pkt[1] &
753 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID);
754 frame_end = data_pkt[1] &
755 EM25XX_FRMDATAHDR_BYTE2_FRAME_END;
756 data_pkt += 2;
757 data_len -= 2;
758 }
759
760 /* Finish field and prepare next (BULK only) */
761 if (dev->analog_xfer_bulk && frame_end) {
762 buf = finish_field_prepare_next(dev, buf, dmaq);
763 dev->usb_ctl.vid_buf = buf;
764 }
765 /*
766 * NOTE: in ISOC mode when a new frame starts and buf==NULL,
767 * we COULD already prepare a buffer here to avoid skipping the
768 * first frame.
769 */
770 }
771
772 /* Copy data */
773 if (buf && data_len > 0)
774 em28xx_copy_video(dev, buf, data_pkt, data_len);
775
776 /* Finish frame (ISOC only) => avoids lag of 1 frame */
777 if (!dev->analog_xfer_bulk && frame_end) {
778 buf = finish_field_prepare_next(dev, buf, dmaq);
779 dev->usb_ctl.vid_buf = buf;
780 }
781
782 /*
783 * NOTES:
784 *
785 * 1) Tested with USB bulk transfers only !
786 * The wording in the datasheet suggests that isoc might work different.
787 * The current code assumes that with isoc transfers each packet has a
788 * header like with the other em28xx devices.
789 *
790 * 2) Support for interlaced mode is pure theory. It has not been
791 * tested and it is unknown if these devices actually support it.
792 */
793 }
794
795 /* Processes and copies the URB data content (video and VBI data) */
796 static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb)
797 {
798 int xfer_bulk, num_packets, i;
799 unsigned char *usb_data_pkt;
800 unsigned int usb_data_len;
801
802 if (!dev)
803 return 0;
804
805 if (dev->disconnected)
806 return 0;
807
808 if (urb->status < 0)
809 print_err_status(dev, -1, urb->status);
810
811 xfer_bulk = usb_pipebulk(urb->pipe);
812
813 if (xfer_bulk) /* bulk */
814 num_packets = 1;
815 else /* isoc */
816 num_packets = urb->number_of_packets;
817
818 for (i = 0; i < num_packets; i++) {
819 if (xfer_bulk) { /* bulk */
820 usb_data_len = urb->actual_length;
821
822 usb_data_pkt = urb->transfer_buffer;
823 } else { /* isoc */
824 if (urb->iso_frame_desc[i].status < 0) {
825 print_err_status(dev, i,
826 urb->iso_frame_desc[i].status);
827 if (urb->iso_frame_desc[i].status != -EPROTO)
828 continue;
829 }
830
831 usb_data_len = urb->iso_frame_desc[i].actual_length;
832 if (usb_data_len > dev->max_pkt_size) {
833 em28xx_isocdbg("packet bigger than packet size");
834 continue;
835 }
836
837 usb_data_pkt = urb->transfer_buffer +
838 urb->iso_frame_desc[i].offset;
839 }
840
841 if (usb_data_len == 0) {
842 /* NOTE: happens very often with isoc transfers */
843 /* em28xx_usbdbg("packet %d is empty",i); - spammy */
844 continue;
845 }
846
847 if (dev->is_em25xx)
848 process_frame_data_em25xx(dev,
849 usb_data_pkt, usb_data_len);
850 else
851 process_frame_data_em28xx(dev,
852 usb_data_pkt, usb_data_len);
853 }
854 return 1;
855 }
856
857 static int get_resource(enum v4l2_buf_type f_type)
858 {
859 switch (f_type) {
860 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
861 return EM28XX_RESOURCE_VIDEO;
862 case V4L2_BUF_TYPE_VBI_CAPTURE:
863 return EM28XX_RESOURCE_VBI;
864 default:
865 WARN_ON(1);
866 return -1; /* Indicate that device is busy */
867 }
868 }
869
870 /* Usage lock check functions */
871 static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type)
872 {
873 int res_type = get_resource(f_type);
874
875 /* is it free? */
876 if (dev->resources & res_type) {
877 /* no, someone else uses it */
878 return -EBUSY;
879 }
880
881 /* it's free, grab it */
882 dev->resources |= res_type;
883 em28xx_videodbg("res: get %d\n", res_type);
884 return 0;
885 }
886
887 static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type)
888 {
889 int res_type = get_resource(f_type);
890
891 dev->resources &= ~res_type;
892 em28xx_videodbg("res: put %d\n", res_type);
893 }
894
895 static void em28xx_v4l2_media_release(struct em28xx *dev)
896 {
897 #ifdef CONFIG_MEDIA_CONTROLLER
898 int i;
899
900 for (i = 0; i < MAX_EM28XX_INPUT; i++) {
901 if (!INPUT(i)->type)
902 return;
903 media_device_unregister_entity(&dev->input_ent[i]);
904 }
905 #endif
906 }
907
908 /*
909 * Media Controller helper functions
910 */
911
912 static int em28xx_enable_analog_tuner(struct em28xx *dev)
913 {
914 #ifdef CONFIG_MEDIA_CONTROLLER
915 struct media_device *mdev = dev->media_dev;
916 struct em28xx_v4l2 *v4l2 = dev->v4l2;
917 struct media_entity *source;
918 struct media_link *link, *found_link = NULL;
919 int ret, active_links = 0;
920
921 if (!mdev || !v4l2->decoder)
922 return 0;
923
924 /*
925 * This will find the tuner that is connected into the decoder.
926 * Technically, this is not 100% correct, as the device may be
927 * using an analog input instead of the tuner. However, as we can't
928 * do DVB streaming while the DMA engine is being used for V4L2,
929 * this should be enough for the actual needs.
930 */
931 list_for_each_entry(link, &v4l2->decoder->links, list) {
932 if (link->sink->entity == v4l2->decoder) {
933 found_link = link;
934 if (link->flags & MEDIA_LNK_FL_ENABLED)
935 active_links++;
936 break;
937 }
938 }
939
940 if (active_links == 1 || !found_link)
941 return 0;
942
943 source = found_link->source->entity;
944 list_for_each_entry(link, &source->links, list) {
945 struct media_entity *sink;
946 int flags = 0;
947
948 sink = link->sink->entity;
949
950 if (sink == v4l2->decoder)
951 flags = MEDIA_LNK_FL_ENABLED;
952
953 ret = media_entity_setup_link(link, flags);
954 if (ret) {
955 dev_err(&dev->intf->dev,
956 "Couldn't change link %s->%s to %s. Error %d\n",
957 source->name, sink->name,
958 flags ? "enabled" : "disabled",
959 ret);
960 return ret;
961 }
962
963 em28xx_videodbg("link %s->%s was %s\n",
964 source->name, sink->name,
965 flags ? "ENABLED" : "disabled");
966 }
967 #endif
968 return 0;
969 }
970
971 static const char * const iname[] = {
972 [EM28XX_VMUX_COMPOSITE] = "Composite",
973 [EM28XX_VMUX_SVIDEO] = "S-Video",
974 [EM28XX_VMUX_TELEVISION] = "Television",
975 [EM28XX_RADIO] = "Radio",
976 };
977
978 static void em28xx_v4l2_create_entities(struct em28xx *dev)
979 {
980 #if defined(CONFIG_MEDIA_CONTROLLER)
981 struct em28xx_v4l2 *v4l2 = dev->v4l2;
982 int ret, i;
983
984 /* Initialize Video, VBI and Radio pads */
985 v4l2->video_pad.flags = MEDIA_PAD_FL_SINK;
986 ret = media_entity_pads_init(&v4l2->vdev.entity, 1, &v4l2->video_pad);
987 if (ret < 0)
988 dev_err(&dev->intf->dev,
989 "failed to initialize video media entity!\n");
990
991 if (em28xx_vbi_supported(dev)) {
992 v4l2->vbi_pad.flags = MEDIA_PAD_FL_SINK;
993 ret = media_entity_pads_init(&v4l2->vbi_dev.entity, 1,
994 &v4l2->vbi_pad);
995 if (ret < 0)
996 dev_err(&dev->intf->dev,
997 "failed to initialize vbi media entity!\n");
998 }
999
1000 /* Webcams don't have input connectors */
1001 if (dev->is_webcam)
1002 return;
1003
1004 /* Create entities for each input connector */
1005 for (i = 0; i < MAX_EM28XX_INPUT; i++) {
1006 struct media_entity *ent = &dev->input_ent[i];
1007
1008 if (!INPUT(i)->type)
1009 break;
1010
1011 ent->name = iname[INPUT(i)->type];
1012 ent->flags = MEDIA_ENT_FL_CONNECTOR;
1013 dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;
1014
1015 switch (INPUT(i)->type) {
1016 case EM28XX_VMUX_COMPOSITE:
1017 ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
1018 break;
1019 case EM28XX_VMUX_SVIDEO:
1020 ent->function = MEDIA_ENT_F_CONN_SVIDEO;
1021 break;
1022 default: /* EM28XX_VMUX_TELEVISION or EM28XX_RADIO */
1023 if (dev->tuner_type != TUNER_ABSENT)
1024 ent->function = MEDIA_ENT_F_CONN_RF;
1025 break;
1026 }
1027
1028 ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
1029 if (ret < 0)
1030 dev_err(&dev->intf->dev,
1031 "failed to initialize input pad[%d]!\n", i);
1032
1033 ret = media_device_register_entity(dev->media_dev, ent);
1034 if (ret < 0)
1035 dev_err(&dev->intf->dev,
1036 "failed to register input entity %d!\n", i);
1037 }
1038 #endif
1039 }
1040
1041 /*
1042 * Videobuf2 operations
1043 */
1044
1045 static int queue_setup(struct vb2_queue *vq,
1046 unsigned int *nbuffers, unsigned int *nplanes,
1047 unsigned int sizes[], struct device *alloc_devs[])
1048 {
1049 struct em28xx *dev = vb2_get_drv_priv(vq);
1050 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1051 unsigned long size =
1052 (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;
1053
1054 if (*nplanes)
1055 return sizes[0] < size ? -EINVAL : 0;
1056 *nplanes = 1;
1057 sizes[0] = size;
1058
1059 em28xx_enable_analog_tuner(dev);
1060
1061 return 0;
1062 }
1063
1064 static int
1065 buffer_prepare(struct vb2_buffer *vb)
1066 {
1067 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1068 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
1069 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1070 unsigned long size;
1071
1072 em28xx_videodbg("%s, field=%d\n", __func__, vbuf->field);
1073
1074 size = (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;
1075
1076 if (vb2_plane_size(vb, 0) < size) {
1077 em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n",
1078 __func__, vb2_plane_size(vb, 0), size);
1079 return -EINVAL;
1080 }
1081 vb2_set_plane_payload(vb, 0, size);
1082
1083 return 0;
1084 }
1085
1086 int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
1087 {
1088 struct em28xx *dev = vb2_get_drv_priv(vq);
1089 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1090 struct v4l2_frequency f;
1091 struct v4l2_fh *owner;
1092 int rc = 0;
1093
1094 em28xx_videodbg("%s\n", __func__);
1095
1096 /*
1097 * Make sure streaming is not already in progress for this type
1098 * of filehandle (e.g. video, vbi)
1099 */
1100 rc = res_get(dev, vq->type);
1101 if (rc)
1102 return rc;
1103
1104 if (v4l2->streaming_users == 0) {
1105 /* First active streaming user, so allocate all the URBs */
1106
1107 /* Allocate the USB bandwidth */
1108 em28xx_set_alternate(dev);
1109
1110 /*
1111 * Needed, since GPIO might have disabled power of
1112 * some i2c device
1113 */
1114 em28xx_wake_i2c(dev);
1115
1116 v4l2->capture_type = -1;
1117 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE,
1118 dev->analog_xfer_bulk,
1119 EM28XX_NUM_BUFS,
1120 dev->max_pkt_size,
1121 dev->packet_multiplier,
1122 em28xx_urb_data_copy);
1123 if (rc < 0)
1124 return rc;
1125
1126 /*
1127 * djh: it's not clear whether this code is still needed. I'm
1128 * leaving it in here for now entirely out of concern for
1129 * backward compatibility (the old code did it)
1130 */
1131
1132 /* Ask tuner to go to analog or radio mode */
1133 memset(&f, 0, sizeof(f));
1134 f.frequency = v4l2->frequency;
1135 owner = (struct v4l2_fh *)vq->owner;
1136 if (owner && owner->vdev->vfl_type == VFL_TYPE_RADIO)
1137 f.type = V4L2_TUNER_RADIO;
1138 else
1139 f.type = V4L2_TUNER_ANALOG_TV;
1140 v4l2_device_call_all(&v4l2->v4l2_dev,
1141 0, tuner, s_frequency, &f);
1142
1143 /* Enable video stream at TV decoder */
1144 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 1);
1145 }
1146
1147 v4l2->streaming_users++;
1148
1149 return rc;
1150 }
1151
1152 static void em28xx_stop_streaming(struct vb2_queue *vq)
1153 {
1154 struct em28xx *dev = vb2_get_drv_priv(vq);
1155 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1156 struct em28xx_dmaqueue *vidq = &dev->vidq;
1157 unsigned long flags = 0;
1158
1159 em28xx_videodbg("%s\n", __func__);
1160
1161 res_free(dev, vq->type);
1162
1163 if (v4l2->streaming_users-- == 1) {
1164 /* Disable video stream at TV decoder */
1165 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0);
1166
1167 /* Last active user, so shutdown all the URBS */
1168 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1169 }
1170
1171 spin_lock_irqsave(&dev->slock, flags);
1172 if (dev->usb_ctl.vid_buf) {
1173 vb2_buffer_done(&dev->usb_ctl.vid_buf->vb.vb2_buf,
1174 VB2_BUF_STATE_ERROR);
1175 dev->usb_ctl.vid_buf = NULL;
1176 }
1177 while (!list_empty(&vidq->active)) {
1178 struct em28xx_buffer *buf;
1179
1180 buf = list_entry(vidq->active.next, struct em28xx_buffer, list);
1181 list_del(&buf->list);
1182 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1183 }
1184 spin_unlock_irqrestore(&dev->slock, flags);
1185 }
1186
1187 void em28xx_stop_vbi_streaming(struct vb2_queue *vq)
1188 {
1189 struct em28xx *dev = vb2_get_drv_priv(vq);
1190 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1191 struct em28xx_dmaqueue *vbiq = &dev->vbiq;
1192 unsigned long flags = 0;
1193
1194 em28xx_videodbg("%s\n", __func__);
1195
1196 res_free(dev, vq->type);
1197
1198 if (v4l2->streaming_users-- == 1) {
1199 /* Disable video stream at TV decoder */
1200 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0);
1201
1202 /* Last active user, so shutdown all the URBS */
1203 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1204 }
1205
1206 spin_lock_irqsave(&dev->slock, flags);
1207 if (dev->usb_ctl.vbi_buf) {
1208 vb2_buffer_done(&dev->usb_ctl.vbi_buf->vb.vb2_buf,
1209 VB2_BUF_STATE_ERROR);
1210 dev->usb_ctl.vbi_buf = NULL;
1211 }
1212 while (!list_empty(&vbiq->active)) {
1213 struct em28xx_buffer *buf;
1214
1215 buf = list_entry(vbiq->active.next, struct em28xx_buffer, list);
1216 list_del(&buf->list);
1217 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1218 }
1219 spin_unlock_irqrestore(&dev->slock, flags);
1220 }
1221
1222 static void
1223 buffer_queue(struct vb2_buffer *vb)
1224 {
1225 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1226 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
1227 struct em28xx_buffer *buf =
1228 container_of(vbuf, struct em28xx_buffer, vb);
1229 struct em28xx_dmaqueue *vidq = &dev->vidq;
1230 unsigned long flags = 0;
1231
1232 em28xx_videodbg("%s\n", __func__);
1233 buf->mem = vb2_plane_vaddr(vb, 0);
1234 buf->length = vb2_plane_size(vb, 0);
1235
1236 spin_lock_irqsave(&dev->slock, flags);
1237 list_add_tail(&buf->list, &vidq->active);
1238 spin_unlock_irqrestore(&dev->slock, flags);
1239 }
1240
1241 static const struct vb2_ops em28xx_video_qops = {
1242 .queue_setup = queue_setup,
1243 .buf_prepare = buffer_prepare,
1244 .buf_queue = buffer_queue,
1245 .start_streaming = em28xx_start_analog_streaming,
1246 .stop_streaming = em28xx_stop_streaming,
1247 .wait_prepare = vb2_ops_wait_prepare,
1248 .wait_finish = vb2_ops_wait_finish,
1249 };
1250
1251 static int em28xx_vb2_setup(struct em28xx *dev)
1252 {
1253 int rc;
1254 struct vb2_queue *q;
1255 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1256
1257 /* Setup Videobuf2 for Video capture */
1258 q = &v4l2->vb_vidq;
1259 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1260 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1261 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1262 q->drv_priv = dev;
1263 q->buf_struct_size = sizeof(struct em28xx_buffer);
1264 q->ops = &em28xx_video_qops;
1265 q->mem_ops = &vb2_vmalloc_memops;
1266
1267 rc = vb2_queue_init(q);
1268 if (rc < 0)
1269 return rc;
1270
1271 /* Setup Videobuf2 for VBI capture */
1272 q = &v4l2->vb_vbiq;
1273 q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1274 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
1275 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1276 q->drv_priv = dev;
1277 q->buf_struct_size = sizeof(struct em28xx_buffer);
1278 q->ops = &em28xx_vbi_qops;
1279 q->mem_ops = &vb2_vmalloc_memops;
1280
1281 rc = vb2_queue_init(q);
1282 if (rc < 0)
1283 return rc;
1284
1285 return 0;
1286 }
1287
1288 /*
1289 * v4l2 interface
1290 */
1291
1292 static void video_mux(struct em28xx *dev, int index)
1293 {
1294 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
1295
1296 dev->ctl_input = index;
1297 dev->ctl_ainput = INPUT(index)->amux;
1298 dev->ctl_aoutput = INPUT(index)->aout;
1299
1300 if (!dev->ctl_aoutput)
1301 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1302
1303 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
1304 INPUT(index)->vmux, 0, 0);
1305
1306 if (dev->has_msp34xx) {
1307 if (dev->i2s_speed) {
1308 v4l2_device_call_all(v4l2_dev, 0, audio,
1309 s_i2s_clock_freq, dev->i2s_speed);
1310 }
1311 /* Note: this is msp3400 specific */
1312 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1313 dev->ctl_ainput,
1314 MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
1315 }
1316
1317 if (dev->board.adecoder != EM28XX_NOADECODER) {
1318 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1319 dev->ctl_ainput, dev->ctl_aoutput, 0);
1320 }
1321
1322 em28xx_audio_analog_set(dev);
1323 }
1324
1325 static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv)
1326 {
1327 struct em28xx *dev = priv;
1328
1329 /*
1330 * In the case of non-AC97 volume controls, we still need
1331 * to do some setups at em28xx, in order to mute/unmute
1332 * and to adjust audio volume. However, the value ranges
1333 * should be checked by the corresponding V4L subdriver.
1334 */
1335 switch (ctrl->id) {
1336 case V4L2_CID_AUDIO_MUTE:
1337 dev->mute = ctrl->val;
1338 em28xx_audio_analog_set(dev);
1339 break;
1340 case V4L2_CID_AUDIO_VOLUME:
1341 dev->volume = ctrl->val;
1342 em28xx_audio_analog_set(dev);
1343 break;
1344 }
1345 }
1346
1347 static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl)
1348 {
1349 struct em28xx_v4l2 *v4l2 =
1350 container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler);
1351 struct em28xx *dev = v4l2->dev;
1352 int ret = -EINVAL;
1353
1354 switch (ctrl->id) {
1355 case V4L2_CID_AUDIO_MUTE:
1356 dev->mute = ctrl->val;
1357 ret = em28xx_audio_analog_set(dev);
1358 break;
1359 case V4L2_CID_AUDIO_VOLUME:
1360 dev->volume = ctrl->val;
1361 ret = em28xx_audio_analog_set(dev);
1362 break;
1363 case V4L2_CID_CONTRAST:
1364 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val);
1365 break;
1366 case V4L2_CID_BRIGHTNESS:
1367 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val);
1368 break;
1369 case V4L2_CID_SATURATION:
1370 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val);
1371 break;
1372 case V4L2_CID_BLUE_BALANCE:
1373 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val);
1374 break;
1375 case V4L2_CID_RED_BALANCE:
1376 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val);
1377 break;
1378 case V4L2_CID_SHARPNESS:
1379 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val);
1380 break;
1381 }
1382
1383 return (ret < 0) ? ret : 0;
1384 }
1385
1386 static const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
1387 .s_ctrl = em28xx_s_ctrl,
1388 };
1389
1390 static void size_to_scale(struct em28xx *dev,
1391 unsigned int width, unsigned int height,
1392 unsigned int *hscale, unsigned int *vscale)
1393 {
1394 unsigned int maxw = norm_maxw(dev);
1395 unsigned int maxh = norm_maxh(dev);
1396
1397 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1398 if (*hscale > EM28XX_HVSCALE_MAX)
1399 *hscale = EM28XX_HVSCALE_MAX;
1400
1401 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1402 if (*vscale > EM28XX_HVSCALE_MAX)
1403 *vscale = EM28XX_HVSCALE_MAX;
1404 }
1405
1406 static void scale_to_size(struct em28xx *dev,
1407 unsigned int hscale, unsigned int vscale,
1408 unsigned int *width, unsigned int *height)
1409 {
1410 unsigned int maxw = norm_maxw(dev);
1411 unsigned int maxh = norm_maxh(dev);
1412
1413 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1414 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1415
1416 /* Don't let width or height to be zero */
1417 if (*width < 1)
1418 *width = 1;
1419 if (*height < 1)
1420 *height = 1;
1421 }
1422
1423 /*
1424 * IOCTL vidioc handling
1425 */
1426
1427 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1428 struct v4l2_format *f)
1429 {
1430 struct em28xx *dev = video_drvdata(file);
1431 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1432
1433 f->fmt.pix.width = v4l2->width;
1434 f->fmt.pix.height = v4l2->height;
1435 f->fmt.pix.pixelformat = v4l2->format->fourcc;
1436 f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3;
1437 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height;
1438 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1439
1440 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1441 if (v4l2->progressive)
1442 f->fmt.pix.field = V4L2_FIELD_NONE;
1443 else
1444 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1445 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1446 return 0;
1447 }
1448
1449 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1450 {
1451 unsigned int i;
1452
1453 for (i = 0; i < ARRAY_SIZE(format); i++)
1454 if (format[i].fourcc == fourcc)
1455 return &format[i];
1456
1457 return NULL;
1458 }
1459
1460 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1461 struct v4l2_format *f)
1462 {
1463 struct em28xx *dev = video_drvdata(file);
1464 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1465 unsigned int width = f->fmt.pix.width;
1466 unsigned int height = f->fmt.pix.height;
1467 unsigned int maxw = norm_maxw(dev);
1468 unsigned int maxh = norm_maxh(dev);
1469 unsigned int hscale, vscale;
1470 struct em28xx_fmt *fmt;
1471
1472 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1473 if (!fmt) {
1474 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1475 f->fmt.pix.pixelformat);
1476 return -EINVAL;
1477 }
1478
1479 if (dev->board.is_em2800) {
1480 /* the em2800 can only scale down to 50% */
1481 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1482 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1483 /*
1484 * MaxPacketSize for em2800 is too small to capture at full
1485 * resolution use half of maxw as the scaler can only scale
1486 * to 50%
1487 */
1488 if (width == maxw && height == maxh)
1489 width /= 2;
1490 } else {
1491 /*
1492 * width must even because of the YUYV format
1493 * height must be even because of interlacing
1494 */
1495 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1496 1, 0);
1497 }
1498 /* Avoid division by zero at size_to_scale */
1499 if (width < 1)
1500 width = 1;
1501 if (height < 1)
1502 height = 1;
1503
1504 size_to_scale(dev, width, height, &hscale, &vscale);
1505 scale_to_size(dev, hscale, vscale, &width, &height);
1506
1507 f->fmt.pix.width = width;
1508 f->fmt.pix.height = height;
1509 f->fmt.pix.pixelformat = fmt->fourcc;
1510 f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
1511 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1512 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1513 if (v4l2->progressive)
1514 f->fmt.pix.field = V4L2_FIELD_NONE;
1515 else
1516 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1517 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1518 f->fmt.pix.priv = 0;
1519
1520 return 0;
1521 }
1522
1523 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1524 unsigned int width, unsigned int height)
1525 {
1526 struct em28xx_fmt *fmt;
1527 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1528
1529 fmt = format_by_fourcc(fourcc);
1530 if (!fmt)
1531 return -EINVAL;
1532
1533 v4l2->format = fmt;
1534 v4l2->width = width;
1535 v4l2->height = height;
1536
1537 /* set new image size */
1538 size_to_scale(dev, v4l2->width, v4l2->height,
1539 &v4l2->hscale, &v4l2->vscale);
1540
1541 em28xx_resolution_set(dev);
1542
1543 return 0;
1544 }
1545
1546 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1547 struct v4l2_format *f)
1548 {
1549 struct em28xx *dev = video_drvdata(file);
1550 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1551
1552 if (vb2_is_busy(&v4l2->vb_vidq))
1553 return -EBUSY;
1554
1555 vidioc_try_fmt_vid_cap(file, priv, f);
1556
1557 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1558 f->fmt.pix.width, f->fmt.pix.height);
1559 }
1560
1561 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1562 {
1563 struct em28xx *dev = video_drvdata(file);
1564
1565 *norm = dev->v4l2->norm;
1566
1567 return 0;
1568 }
1569
1570 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
1571 {
1572 struct em28xx *dev = video_drvdata(file);
1573
1574 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm);
1575
1576 return 0;
1577 }
1578
1579 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
1580 {
1581 struct em28xx *dev = video_drvdata(file);
1582 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1583 struct v4l2_format f;
1584
1585 if (norm == v4l2->norm)
1586 return 0;
1587
1588 if (v4l2->streaming_users > 0)
1589 return -EBUSY;
1590
1591 v4l2->norm = norm;
1592
1593 /* Adjusts width/height, if needed */
1594 f.fmt.pix.width = 720;
1595 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576;
1596 vidioc_try_fmt_vid_cap(file, priv, &f);
1597
1598 /* set new image size */
1599 v4l2->width = f.fmt.pix.width;
1600 v4l2->height = f.fmt.pix.height;
1601 size_to_scale(dev, v4l2->width, v4l2->height,
1602 &v4l2->hscale, &v4l2->vscale);
1603
1604 em28xx_resolution_set(dev);
1605 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
1606
1607 return 0;
1608 }
1609
1610 static int vidioc_g_parm(struct file *file, void *priv,
1611 struct v4l2_streamparm *p)
1612 {
1613 struct v4l2_subdev_frame_interval ival = { 0 };
1614 struct em28xx *dev = video_drvdata(file);
1615 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1616 int rc = 0;
1617
1618 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1619 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1620 return -EINVAL;
1621
1622 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1623 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1624 if (dev->is_webcam) {
1625 rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0,
1626 video, g_frame_interval, &ival);
1627 if (!rc)
1628 p->parm.capture.timeperframe = ival.interval;
1629 } else {
1630 v4l2_video_std_frame_period(v4l2->norm,
1631 &p->parm.capture.timeperframe);
1632 }
1633
1634 return rc;
1635 }
1636
1637 static int vidioc_s_parm(struct file *file, void *priv,
1638 struct v4l2_streamparm *p)
1639 {
1640 struct em28xx *dev = video_drvdata(file);
1641 struct v4l2_subdev_frame_interval ival = {
1642 0,
1643 p->parm.capture.timeperframe
1644 };
1645 int rc = 0;
1646
1647 if (!dev->is_webcam)
1648 return -ENOTTY;
1649
1650 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1651 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1652 return -EINVAL;
1653
1654 memset(&p->parm, 0, sizeof(p->parm));
1655 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1656 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1657 rc = v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 0,
1658 video, s_frame_interval, &ival);
1659 if (!rc)
1660 p->parm.capture.timeperframe = ival.interval;
1661 return rc;
1662 }
1663
1664 static int vidioc_enum_input(struct file *file, void *priv,
1665 struct v4l2_input *i)
1666 {
1667 struct em28xx *dev = video_drvdata(file);
1668 unsigned int n;
1669
1670 n = i->index;
1671 if (n >= MAX_EM28XX_INPUT)
1672 return -EINVAL;
1673 if (!INPUT(n)->type)
1674 return -EINVAL;
1675
1676 i->type = V4L2_INPUT_TYPE_CAMERA;
1677
1678 strcpy(i->name, iname[INPUT(n)->type]);
1679
1680 if (INPUT(n)->type == EM28XX_VMUX_TELEVISION)
1681 i->type = V4L2_INPUT_TYPE_TUNER;
1682
1683 i->std = dev->v4l2->vdev.tvnorms;
1684 /* webcams do not have the STD API */
1685 if (dev->is_webcam)
1686 i->capabilities = 0;
1687
1688 return 0;
1689 }
1690
1691 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1692 {
1693 struct em28xx *dev = video_drvdata(file);
1694
1695 *i = dev->ctl_input;
1696
1697 return 0;
1698 }
1699
1700 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1701 {
1702 struct em28xx *dev = video_drvdata(file);
1703
1704 if (i >= MAX_EM28XX_INPUT)
1705 return -EINVAL;
1706 if (!INPUT(i)->type)
1707 return -EINVAL;
1708
1709 video_mux(dev, i);
1710 return 0;
1711 }
1712
1713 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1714 {
1715 struct em28xx *dev = video_drvdata(file);
1716
1717 switch (a->index) {
1718 case EM28XX_AMUX_VIDEO:
1719 strcpy(a->name, "Television");
1720 break;
1721 case EM28XX_AMUX_LINE_IN:
1722 strcpy(a->name, "Line In");
1723 break;
1724 case EM28XX_AMUX_VIDEO2:
1725 strcpy(a->name, "Television alt");
1726 break;
1727 case EM28XX_AMUX_PHONE:
1728 strcpy(a->name, "Phone");
1729 break;
1730 case EM28XX_AMUX_MIC:
1731 strcpy(a->name, "Mic");
1732 break;
1733 case EM28XX_AMUX_CD:
1734 strcpy(a->name, "CD");
1735 break;
1736 case EM28XX_AMUX_AUX:
1737 strcpy(a->name, "Aux");
1738 break;
1739 case EM28XX_AMUX_PCM_OUT:
1740 strcpy(a->name, "PCM");
1741 break;
1742 default:
1743 return -EINVAL;
1744 }
1745
1746 a->index = dev->ctl_ainput;
1747 a->capability = V4L2_AUDCAP_STEREO;
1748
1749 return 0;
1750 }
1751
1752 static int vidioc_s_audio(struct file *file, void *priv,
1753 const struct v4l2_audio *a)
1754 {
1755 struct em28xx *dev = video_drvdata(file);
1756
1757 if (a->index >= MAX_EM28XX_INPUT)
1758 return -EINVAL;
1759 if (!INPUT(a->index)->type)
1760 return -EINVAL;
1761
1762 dev->ctl_ainput = INPUT(a->index)->amux;
1763 dev->ctl_aoutput = INPUT(a->index)->aout;
1764
1765 if (!dev->ctl_aoutput)
1766 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1767
1768 return 0;
1769 }
1770
1771 static int vidioc_g_tuner(struct file *file, void *priv,
1772 struct v4l2_tuner *t)
1773 {
1774 struct em28xx *dev = video_drvdata(file);
1775
1776 if (t->index != 0)
1777 return -EINVAL;
1778
1779 strcpy(t->name, "Tuner");
1780
1781 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
1782 return 0;
1783 }
1784
1785 static int vidioc_s_tuner(struct file *file, void *priv,
1786 const struct v4l2_tuner *t)
1787 {
1788 struct em28xx *dev = video_drvdata(file);
1789
1790 if (t->index != 0)
1791 return -EINVAL;
1792
1793 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
1794 return 0;
1795 }
1796
1797 static int vidioc_g_frequency(struct file *file, void *priv,
1798 struct v4l2_frequency *f)
1799 {
1800 struct em28xx *dev = video_drvdata(file);
1801 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1802
1803 if (f->tuner != 0)
1804 return -EINVAL;
1805
1806 f->frequency = v4l2->frequency;
1807 return 0;
1808 }
1809
1810 static int vidioc_s_frequency(struct file *file, void *priv,
1811 const struct v4l2_frequency *f)
1812 {
1813 struct v4l2_frequency new_freq = *f;
1814 struct em28xx *dev = video_drvdata(file);
1815 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1816
1817 if (f->tuner != 0)
1818 return -EINVAL;
1819
1820 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f);
1821 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq);
1822 v4l2->frequency = new_freq.frequency;
1823
1824 return 0;
1825 }
1826
1827 #ifdef CONFIG_VIDEO_ADV_DEBUG
1828 static int vidioc_g_chip_info(struct file *file, void *priv,
1829 struct v4l2_dbg_chip_info *chip)
1830 {
1831 struct em28xx *dev = video_drvdata(file);
1832
1833 if (chip->match.addr > 1)
1834 return -EINVAL;
1835 if (chip->match.addr == 1)
1836 strlcpy(chip->name, "ac97", sizeof(chip->name));
1837 else
1838 strlcpy(chip->name,
1839 dev->v4l2->v4l2_dev.name, sizeof(chip->name));
1840 return 0;
1841 }
1842
1843 static int em28xx_reg_len(int reg)
1844 {
1845 switch (reg) {
1846 case EM28XX_R40_AC97LSB:
1847 case EM28XX_R30_HSCALELOW:
1848 case EM28XX_R32_VSCALELOW:
1849 return 2;
1850 default:
1851 return 1;
1852 }
1853 }
1854
1855 static int vidioc_g_register(struct file *file, void *priv,
1856 struct v4l2_dbg_register *reg)
1857 {
1858 struct em28xx *dev = video_drvdata(file);
1859 int ret;
1860
1861 if (reg->match.addr > 1)
1862 return -EINVAL;
1863 if (reg->match.addr) {
1864 ret = em28xx_read_ac97(dev, reg->reg);
1865 if (ret < 0)
1866 return ret;
1867
1868 reg->val = ret;
1869 reg->size = 1;
1870 return 0;
1871 }
1872
1873 /* Match host */
1874 reg->size = em28xx_reg_len(reg->reg);
1875 if (reg->size == 1) {
1876 ret = em28xx_read_reg(dev, reg->reg);
1877
1878 if (ret < 0)
1879 return ret;
1880
1881 reg->val = ret;
1882 } else {
1883 __le16 val = 0;
1884
1885 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1886 reg->reg, (char *)&val, 2);
1887 if (ret < 0)
1888 return ret;
1889
1890 reg->val = le16_to_cpu(val);
1891 }
1892
1893 return 0;
1894 }
1895
1896 static int vidioc_s_register(struct file *file, void *priv,
1897 const struct v4l2_dbg_register *reg)
1898 {
1899 struct em28xx *dev = video_drvdata(file);
1900 __le16 buf;
1901
1902 if (reg->match.addr > 1)
1903 return -EINVAL;
1904 if (reg->match.addr)
1905 return em28xx_write_ac97(dev, reg->reg, reg->val);
1906
1907 /* Match host */
1908 buf = cpu_to_le16(reg->val);
1909
1910 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1911 em28xx_reg_len(reg->reg));
1912 }
1913 #endif
1914
1915 static int vidioc_querycap(struct file *file, void *priv,
1916 struct v4l2_capability *cap)
1917 {
1918 struct video_device *vdev = video_devdata(file);
1919 struct em28xx *dev = video_drvdata(file);
1920 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1921 struct usb_device *udev = interface_to_usbdev(dev->intf);
1922
1923 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1924 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1925 usb_make_path(udev, cap->bus_info, sizeof(cap->bus_info));
1926
1927 if (vdev->vfl_type == VFL_TYPE_GRABBER)
1928 cap->device_caps = V4L2_CAP_READWRITE |
1929 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1930 else if (vdev->vfl_type == VFL_TYPE_RADIO)
1931 cap->device_caps = V4L2_CAP_RADIO;
1932 else
1933 cap->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE;
1934
1935 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
1936 cap->device_caps |= V4L2_CAP_AUDIO;
1937
1938 if (dev->tuner_type != TUNER_ABSENT)
1939 cap->device_caps |= V4L2_CAP_TUNER;
1940
1941 cap->capabilities = cap->device_caps |
1942 V4L2_CAP_DEVICE_CAPS | V4L2_CAP_READWRITE |
1943 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1944 if (video_is_registered(&v4l2->vbi_dev))
1945 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1946 if (video_is_registered(&v4l2->radio_dev))
1947 cap->capabilities |= V4L2_CAP_RADIO;
1948 return 0;
1949 }
1950
1951 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1952 struct v4l2_fmtdesc *f)
1953 {
1954 if (unlikely(f->index >= ARRAY_SIZE(format)))
1955 return -EINVAL;
1956
1957 strlcpy(f->description, format[f->index].name, sizeof(f->description));
1958 f->pixelformat = format[f->index].fourcc;
1959
1960 return 0;
1961 }
1962
1963 static int vidioc_enum_framesizes(struct file *file, void *priv,
1964 struct v4l2_frmsizeenum *fsize)
1965 {
1966 struct em28xx *dev = video_drvdata(file);
1967 struct em28xx_fmt *fmt;
1968 unsigned int maxw = norm_maxw(dev);
1969 unsigned int maxh = norm_maxh(dev);
1970
1971 fmt = format_by_fourcc(fsize->pixel_format);
1972 if (!fmt) {
1973 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1974 fsize->pixel_format);
1975 return -EINVAL;
1976 }
1977
1978 if (dev->board.is_em2800) {
1979 if (fsize->index > 1)
1980 return -EINVAL;
1981 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1982 fsize->discrete.width = maxw / (1 + fsize->index);
1983 fsize->discrete.height = maxh / (1 + fsize->index);
1984 return 0;
1985 }
1986
1987 if (fsize->index != 0)
1988 return -EINVAL;
1989
1990 /* Report a continuous range */
1991 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
1992 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
1993 &fsize->stepwise.min_width, &fsize->stepwise.min_height);
1994 if (fsize->stepwise.min_width < 48)
1995 fsize->stepwise.min_width = 48;
1996 if (fsize->stepwise.min_height < 38)
1997 fsize->stepwise.min_height = 38;
1998 fsize->stepwise.max_width = maxw;
1999 fsize->stepwise.max_height = maxh;
2000 fsize->stepwise.step_width = 1;
2001 fsize->stepwise.step_height = 1;
2002 return 0;
2003 }
2004
2005 /* RAW VBI ioctls */
2006
2007 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
2008 struct v4l2_format *format)
2009 {
2010 struct em28xx *dev = video_drvdata(file);
2011 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2012
2013 format->fmt.vbi.samples_per_line = v4l2->vbi_width;
2014 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
2015 format->fmt.vbi.offset = 0;
2016 format->fmt.vbi.flags = 0;
2017 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
2018 format->fmt.vbi.count[0] = v4l2->vbi_height;
2019 format->fmt.vbi.count[1] = v4l2->vbi_height;
2020 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
2021
2022 /* Varies by video standard (NTSC, PAL, etc.) */
2023 if (v4l2->norm & V4L2_STD_525_60) {
2024 /* NTSC */
2025 format->fmt.vbi.start[0] = 10;
2026 format->fmt.vbi.start[1] = 273;
2027 } else if (v4l2->norm & V4L2_STD_625_50) {
2028 /* PAL */
2029 format->fmt.vbi.start[0] = 6;
2030 format->fmt.vbi.start[1] = 318;
2031 }
2032
2033 return 0;
2034 }
2035
2036 /*
2037 * RADIO ESPECIFIC IOCTLS
2038 */
2039
2040 static int radio_g_tuner(struct file *file, void *priv,
2041 struct v4l2_tuner *t)
2042 {
2043 struct em28xx *dev = video_drvdata(file);
2044
2045 if (unlikely(t->index > 0))
2046 return -EINVAL;
2047
2048 strcpy(t->name, "Radio");
2049
2050 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
2051
2052 return 0;
2053 }
2054
2055 static int radio_s_tuner(struct file *file, void *priv,
2056 const struct v4l2_tuner *t)
2057 {
2058 struct em28xx *dev = video_drvdata(file);
2059
2060 if (t->index != 0)
2061 return -EINVAL;
2062
2063 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
2064
2065 return 0;
2066 }
2067
2068 /*
2069 * em28xx_free_v4l2() - Free struct em28xx_v4l2
2070 *
2071 * @ref: struct kref for struct em28xx_v4l2
2072 *
2073 * Called when all users of struct em28xx_v4l2 are gone
2074 */
2075 static void em28xx_free_v4l2(struct kref *ref)
2076 {
2077 struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref);
2078
2079 v4l2->dev->v4l2 = NULL;
2080 kfree(v4l2);
2081 }
2082
2083 /*
2084 * em28xx_v4l2_open()
2085 * inits the device and starts isoc transfer
2086 */
2087 static int em28xx_v4l2_open(struct file *filp)
2088 {
2089 struct video_device *vdev = video_devdata(filp);
2090 struct em28xx *dev = video_drvdata(filp);
2091 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2092 enum v4l2_buf_type fh_type = 0;
2093 int ret;
2094
2095 switch (vdev->vfl_type) {
2096 case VFL_TYPE_GRABBER:
2097 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2098 break;
2099 case VFL_TYPE_VBI:
2100 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2101 break;
2102 case VFL_TYPE_RADIO:
2103 break;
2104 default:
2105 return -EINVAL;
2106 }
2107
2108 em28xx_videodbg("open dev=%s type=%s users=%d\n",
2109 video_device_node_name(vdev), v4l2_type_names[fh_type],
2110 v4l2->users);
2111
2112 if (mutex_lock_interruptible(&dev->lock))
2113 return -ERESTARTSYS;
2114
2115 ret = v4l2_fh_open(filp);
2116 if (ret) {
2117 dev_err(&dev->intf->dev,
2118 "%s: v4l2_fh_open() returned error %d\n",
2119 __func__, ret);
2120 mutex_unlock(&dev->lock);
2121 return ret;
2122 }
2123
2124 if (v4l2->users == 0) {
2125 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2126
2127 if (vdev->vfl_type != VFL_TYPE_RADIO)
2128 em28xx_resolution_set(dev);
2129
2130 /*
2131 * Needed, since GPIO might have disabled power
2132 * of some i2c devices
2133 */
2134 em28xx_wake_i2c(dev);
2135 }
2136
2137 if (vdev->vfl_type == VFL_TYPE_RADIO) {
2138 em28xx_videodbg("video_open: setting radio device\n");
2139 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio);
2140 }
2141
2142 kref_get(&dev->ref);
2143 kref_get(&v4l2->ref);
2144 v4l2->users++;
2145
2146 mutex_unlock(&dev->lock);
2147
2148 return 0;
2149 }
2150
2151 /*
2152 * em28xx_v4l2_fini()
2153 * unregisters the v4l2,i2c and usb devices
2154 * called when the device gets disconected or at module unload
2155 */
2156 static int em28xx_v4l2_fini(struct em28xx *dev)
2157 {
2158 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2159
2160 if (dev->is_audio_only) {
2161 /* Shouldn't initialize IR for this interface */
2162 return 0;
2163 }
2164
2165 if (!dev->has_video) {
2166 /* This device does not support the v4l2 extension */
2167 return 0;
2168 }
2169
2170 if (!v4l2)
2171 return 0;
2172
2173 dev_info(&dev->intf->dev, "Closing video extension\n");
2174
2175 mutex_lock(&dev->lock);
2176
2177 v4l2_device_disconnect(&v4l2->v4l2_dev);
2178
2179 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
2180
2181 em28xx_v4l2_media_release(dev);
2182
2183 if (video_is_registered(&v4l2->radio_dev)) {
2184 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2185 video_device_node_name(&v4l2->radio_dev));
2186 video_unregister_device(&v4l2->radio_dev);
2187 }
2188 if (video_is_registered(&v4l2->vbi_dev)) {
2189 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2190 video_device_node_name(&v4l2->vbi_dev));
2191 video_unregister_device(&v4l2->vbi_dev);
2192 }
2193 if (video_is_registered(&v4l2->vdev)) {
2194 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2195 video_device_node_name(&v4l2->vdev));
2196 video_unregister_device(&v4l2->vdev);
2197 }
2198
2199 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2200 v4l2_device_unregister(&v4l2->v4l2_dev);
2201
2202 kref_put(&v4l2->ref, em28xx_free_v4l2);
2203
2204 mutex_unlock(&dev->lock);
2205
2206 kref_put(&dev->ref, em28xx_free_device);
2207
2208 return 0;
2209 }
2210
2211 static int em28xx_v4l2_suspend(struct em28xx *dev)
2212 {
2213 if (dev->is_audio_only)
2214 return 0;
2215
2216 if (!dev->has_video)
2217 return 0;
2218
2219 dev_info(&dev->intf->dev, "Suspending video extension\n");
2220 em28xx_stop_urbs(dev);
2221 return 0;
2222 }
2223
2224 static int em28xx_v4l2_resume(struct em28xx *dev)
2225 {
2226 if (dev->is_audio_only)
2227 return 0;
2228
2229 if (!dev->has_video)
2230 return 0;
2231
2232 dev_info(&dev->intf->dev, "Resuming video extension\n");
2233 /* what do we do here */
2234 return 0;
2235 }
2236
2237 /*
2238 * em28xx_v4l2_close()
2239 * stops streaming and deallocates all resources allocated by the v4l2
2240 * calls and ioctls
2241 */
2242 static int em28xx_v4l2_close(struct file *filp)
2243 {
2244 struct em28xx *dev = video_drvdata(filp);
2245 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2246 struct usb_device *udev = interface_to_usbdev(dev->intf);
2247 int err;
2248
2249 em28xx_videodbg("users=%d\n", v4l2->users);
2250
2251 vb2_fop_release(filp);
2252 mutex_lock(&dev->lock);
2253
2254 if (v4l2->users == 1) {
2255 /* No sense to try to write to the device */
2256 if (dev->disconnected)
2257 goto exit;
2258
2259 /* Save some power by putting tuner to sleep */
2260 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2261
2262 /* do this before setting alternate! */
2263 em28xx_set_mode(dev, EM28XX_SUSPEND);
2264
2265 /* set alternate 0 */
2266 dev->alt = 0;
2267 em28xx_videodbg("setting alternate 0\n");
2268 err = usb_set_interface(udev, 0, 0);
2269 if (err < 0) {
2270 dev_err(&dev->intf->dev,
2271 "cannot change alternate number to 0 (error=%i)\n",
2272 err);
2273 }
2274 }
2275
2276 exit:
2277 v4l2->users--;
2278 kref_put(&v4l2->ref, em28xx_free_v4l2);
2279 mutex_unlock(&dev->lock);
2280 kref_put(&dev->ref, em28xx_free_device);
2281
2282 return 0;
2283 }
2284
2285 static const struct v4l2_file_operations em28xx_v4l_fops = {
2286 .owner = THIS_MODULE,
2287 .open = em28xx_v4l2_open,
2288 .release = em28xx_v4l2_close,
2289 .read = vb2_fop_read,
2290 .poll = vb2_fop_poll,
2291 .mmap = vb2_fop_mmap,
2292 .unlocked_ioctl = video_ioctl2,
2293 };
2294
2295 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2296 .vidioc_querycap = vidioc_querycap,
2297 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2298 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2299 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2300 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
2301 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2302 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2303 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2304 .vidioc_enum_framesizes = vidioc_enum_framesizes,
2305 .vidioc_g_audio = vidioc_g_audio,
2306 .vidioc_s_audio = vidioc_s_audio,
2307
2308 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2309 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2310 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
2311 .vidioc_querybuf = vb2_ioctl_querybuf,
2312 .vidioc_qbuf = vb2_ioctl_qbuf,
2313 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2314
2315 .vidioc_g_std = vidioc_g_std,
2316 .vidioc_querystd = vidioc_querystd,
2317 .vidioc_s_std = vidioc_s_std,
2318 .vidioc_g_parm = vidioc_g_parm,
2319 .vidioc_s_parm = vidioc_s_parm,
2320 .vidioc_enum_input = vidioc_enum_input,
2321 .vidioc_g_input = vidioc_g_input,
2322 .vidioc_s_input = vidioc_s_input,
2323 .vidioc_streamon = vb2_ioctl_streamon,
2324 .vidioc_streamoff = vb2_ioctl_streamoff,
2325 .vidioc_g_tuner = vidioc_g_tuner,
2326 .vidioc_s_tuner = vidioc_s_tuner,
2327 .vidioc_g_frequency = vidioc_g_frequency,
2328 .vidioc_s_frequency = vidioc_s_frequency,
2329 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2330 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2331 #ifdef CONFIG_VIDEO_ADV_DEBUG
2332 .vidioc_g_chip_info = vidioc_g_chip_info,
2333 .vidioc_g_register = vidioc_g_register,
2334 .vidioc_s_register = vidioc_s_register,
2335 #endif
2336 };
2337
2338 static const struct video_device em28xx_video_template = {
2339 .fops = &em28xx_v4l_fops,
2340 .ioctl_ops = &video_ioctl_ops,
2341 .release = video_device_release_empty,
2342 .tvnorms = V4L2_STD_ALL,
2343 };
2344
2345 static const struct v4l2_file_operations radio_fops = {
2346 .owner = THIS_MODULE,
2347 .open = em28xx_v4l2_open,
2348 .release = em28xx_v4l2_close,
2349 .unlocked_ioctl = video_ioctl2,
2350 };
2351
2352 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2353 .vidioc_querycap = vidioc_querycap,
2354 .vidioc_g_tuner = radio_g_tuner,
2355 .vidioc_s_tuner = radio_s_tuner,
2356 .vidioc_g_frequency = vidioc_g_frequency,
2357 .vidioc_s_frequency = vidioc_s_frequency,
2358 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2359 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2360 #ifdef CONFIG_VIDEO_ADV_DEBUG
2361 .vidioc_g_chip_info = vidioc_g_chip_info,
2362 .vidioc_g_register = vidioc_g_register,
2363 .vidioc_s_register = vidioc_s_register,
2364 #endif
2365 };
2366
2367 static struct video_device em28xx_radio_template = {
2368 .fops = &radio_fops,
2369 .ioctl_ops = &radio_ioctl_ops,
2370 .release = video_device_release_empty,
2371 };
2372
2373 /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */
2374 static unsigned short saa711x_addrs[] = {
2375 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */
2376 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */
2377 I2C_CLIENT_END };
2378
2379 static unsigned short tvp5150_addrs[] = {
2380 0xb8 >> 1,
2381 0xba >> 1,
2382 I2C_CLIENT_END
2383 };
2384
2385 static unsigned short msp3400_addrs[] = {
2386 0x80 >> 1,
2387 0x88 >> 1,
2388 I2C_CLIENT_END
2389 };
2390
2391 /******************************** usb interface ******************************/
2392
2393 static void em28xx_vdev_init(struct em28xx *dev,
2394 struct video_device *vfd,
2395 const struct video_device *template,
2396 const char *type_name)
2397 {
2398 *vfd = *template;
2399 vfd->v4l2_dev = &dev->v4l2->v4l2_dev;
2400 vfd->lock = &dev->lock;
2401 if (dev->is_webcam)
2402 vfd->tvnorms = 0;
2403
2404 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2405 dev_name(&dev->intf->dev), type_name);
2406
2407 video_set_drvdata(vfd, dev);
2408 }
2409
2410 static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr)
2411 {
2412 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2413 struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev;
2414 struct tuner_setup tun_setup;
2415 struct v4l2_frequency f;
2416
2417 memset(&tun_setup, 0, sizeof(tun_setup));
2418
2419 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
2420 tun_setup.tuner_callback = em28xx_tuner_callback;
2421
2422 if (dev->board.radio.type) {
2423 tun_setup.type = dev->board.radio.type;
2424 tun_setup.addr = dev->board.radio_addr;
2425
2426 v4l2_device_call_all(v4l2_dev,
2427 0, tuner, s_type_addr, &tun_setup);
2428 }
2429
2430 if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type) {
2431 tun_setup.type = dev->tuner_type;
2432 tun_setup.addr = tuner_addr;
2433
2434 v4l2_device_call_all(v4l2_dev,
2435 0, tuner, s_type_addr, &tun_setup);
2436 }
2437
2438 if (dev->board.tda9887_conf) {
2439 struct v4l2_priv_tun_config tda9887_cfg;
2440
2441 tda9887_cfg.tuner = TUNER_TDA9887;
2442 tda9887_cfg.priv = &dev->board.tda9887_conf;
2443
2444 v4l2_device_call_all(v4l2_dev,
2445 0, tuner, s_config, &tda9887_cfg);
2446 }
2447
2448 if (dev->tuner_type == TUNER_XC2028) {
2449 struct v4l2_priv_tun_config xc2028_cfg;
2450 struct xc2028_ctrl ctl;
2451
2452 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg));
2453 memset(&ctl, 0, sizeof(ctl));
2454
2455 em28xx_setup_xc3028(dev, &ctl);
2456
2457 xc2028_cfg.tuner = TUNER_XC2028;
2458 xc2028_cfg.priv = &ctl;
2459
2460 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg);
2461 }
2462
2463 /* configure tuner */
2464 f.tuner = 0;
2465 f.type = V4L2_TUNER_ANALOG_TV;
2466 f.frequency = 9076; /* just a magic number */
2467 v4l2->frequency = f.frequency;
2468 v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f);
2469 }
2470
2471 static int em28xx_v4l2_init(struct em28xx *dev)
2472 {
2473 u8 val;
2474 int ret;
2475 unsigned int maxw;
2476 struct v4l2_ctrl_handler *hdl;
2477 struct em28xx_v4l2 *v4l2;
2478
2479 if (dev->is_audio_only) {
2480 /* Shouldn't initialize IR for this interface */
2481 return 0;
2482 }
2483
2484 if (!dev->has_video) {
2485 /* This device does not support the v4l2 extension */
2486 return 0;
2487 }
2488
2489 dev_info(&dev->intf->dev, "Registering V4L2 extension\n");
2490
2491 mutex_lock(&dev->lock);
2492
2493 v4l2 = kzalloc(sizeof(*v4l2), GFP_KERNEL);
2494 if (!v4l2) {
2495 mutex_unlock(&dev->lock);
2496 return -ENOMEM;
2497 }
2498 kref_init(&v4l2->ref);
2499 v4l2->dev = dev;
2500 dev->v4l2 = v4l2;
2501
2502 #ifdef CONFIG_MEDIA_CONTROLLER
2503 v4l2->v4l2_dev.mdev = dev->media_dev;
2504 #endif
2505 ret = v4l2_device_register(&dev->intf->dev, &v4l2->v4l2_dev);
2506 if (ret < 0) {
2507 dev_err(&dev->intf->dev,
2508 "Call to v4l2_device_register() failed!\n");
2509 goto err;
2510 }
2511
2512 hdl = &v4l2->ctrl_handler;
2513 v4l2_ctrl_handler_init(hdl, 8);
2514 v4l2->v4l2_dev.ctrl_handler = hdl;
2515
2516 if (dev->is_webcam)
2517 v4l2->progressive = true;
2518
2519 /*
2520 * Default format, used for tvp5150 or saa711x output formats
2521 */
2522 v4l2->vinmode = EM28XX_VINMODE_YUV422_CbYCrY;
2523 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED |
2524 EM28XX_VINCTRL_CCIR656_ENABLE;
2525
2526 /* request some modules */
2527
2528 if (dev->has_msp34xx)
2529 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2530 &dev->i2c_adap[dev->def_i2c_bus],
2531 "msp3400", 0, msp3400_addrs);
2532
2533 if (dev->board.decoder == EM28XX_SAA711X)
2534 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2535 &dev->i2c_adap[dev->def_i2c_bus],
2536 "saa7115_auto", 0, saa711x_addrs);
2537
2538 if (dev->board.decoder == EM28XX_TVP5150)
2539 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2540 &dev->i2c_adap[dev->def_i2c_bus],
2541 "tvp5150", 0, tvp5150_addrs);
2542
2543 if (dev->board.adecoder == EM28XX_TVAUDIO)
2544 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2545 &dev->i2c_adap[dev->def_i2c_bus],
2546 "tvaudio", dev->board.tvaudio_addr, NULL);
2547
2548 /* Initialize tuner and camera */
2549
2550 if (dev->board.tuner_type != TUNER_ABSENT) {
2551 unsigned short tuner_addr = dev->board.tuner_addr;
2552 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT);
2553
2554 if (dev->board.radio.type)
2555 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2556 &dev->i2c_adap[dev->def_i2c_bus],
2557 "tuner", dev->board.radio_addr,
2558 NULL);
2559
2560 if (has_demod)
2561 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2562 &dev->i2c_adap[dev->def_i2c_bus],
2563 "tuner", 0,
2564 v4l2_i2c_tuner_addrs(ADDRS_DEMOD));
2565 if (tuner_addr == 0) {
2566 enum v4l2_i2c_tuner_type type =
2567 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV;
2568 struct v4l2_subdev *sd;
2569
2570 sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2571 &dev->i2c_adap[dev->def_i2c_bus],
2572 "tuner", 0,
2573 v4l2_i2c_tuner_addrs(type));
2574
2575 if (sd)
2576 tuner_addr = v4l2_i2c_subdev_addr(sd);
2577 } else {
2578 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2579 &dev->i2c_adap[dev->def_i2c_bus],
2580 "tuner", tuner_addr, NULL);
2581 }
2582
2583 em28xx_tuner_setup(dev, tuner_addr);
2584 }
2585
2586 if (dev->em28xx_sensor != EM28XX_NOSENSOR)
2587 em28xx_init_camera(dev);
2588
2589 /* Configure audio */
2590 ret = em28xx_audio_setup(dev);
2591 if (ret < 0) {
2592 dev_err(&dev->intf->dev,
2593 "%s: Error while setting audio - error [%d]!\n",
2594 __func__, ret);
2595 goto unregister_dev;
2596 }
2597 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
2598 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2599 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
2600 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2601 V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f);
2602 } else {
2603 /* install the em28xx notify callback */
2604 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE),
2605 em28xx_ctrl_notify, dev);
2606 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME),
2607 em28xx_ctrl_notify, dev);
2608 }
2609
2610 /* wake i2c devices */
2611 em28xx_wake_i2c(dev);
2612
2613 /* init video dma queues */
2614 INIT_LIST_HEAD(&dev->vidq.active);
2615 INIT_LIST_HEAD(&dev->vbiq.active);
2616
2617 if (dev->has_msp34xx) {
2618 /* Send a reset to other chips via gpio */
2619 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7);
2620 if (ret < 0) {
2621 dev_err(&dev->intf->dev,
2622 "%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n",
2623 __func__, ret);
2624 goto unregister_dev;
2625 }
2626 usleep_range(10000, 11000);
2627
2628 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff);
2629 if (ret < 0) {
2630 dev_err(&dev->intf->dev,
2631 "%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n",
2632 __func__, ret);
2633 goto unregister_dev;
2634 }
2635 usleep_range(10000, 11000);
2636 }
2637
2638 /* set default norm */
2639 v4l2->norm = V4L2_STD_PAL;
2640 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
2641 v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT;
2642
2643 /* Analog specific initialization */
2644 v4l2->format = &format[0];
2645
2646 maxw = norm_maxw(dev);
2647 /*
2648 * MaxPacketSize for em2800 is too small to capture at full resolution
2649 * use half of maxw as the scaler can only scale to 50%
2650 */
2651 if (dev->board.is_em2800)
2652 maxw /= 2;
2653
2654 em28xx_set_video_format(dev, format[0].fourcc,
2655 maxw, norm_maxh(dev));
2656
2657 video_mux(dev, 0);
2658
2659 /* Audio defaults */
2660 dev->mute = 1;
2661 dev->volume = 0x1f;
2662
2663 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2664 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2665 em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2666 (EM28XX_XCLK_AUDIO_UNMUTE | val));
2667
2668 em28xx_set_outfmt(dev);
2669
2670 /* Add image controls */
2671
2672 /*
2673 * NOTE: at this point, the subdevices are already registered, so
2674 * bridge controls are only added/enabled when no subdevice provides
2675 * them
2676 */
2677 if (!v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST))
2678 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2679 V4L2_CID_CONTRAST,
2680 0, 0x1f, 1, CONTRAST_DEFAULT);
2681 if (!v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS))
2682 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2683 V4L2_CID_BRIGHTNESS,
2684 -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT);
2685 if (!v4l2_ctrl_find(hdl, V4L2_CID_SATURATION))
2686 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2687 V4L2_CID_SATURATION,
2688 0, 0x1f, 1, SATURATION_DEFAULT);
2689 if (!v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE))
2690 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2691 V4L2_CID_BLUE_BALANCE,
2692 -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT);
2693 if (!v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE))
2694 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2695 V4L2_CID_RED_BALANCE,
2696 -0x30, 0x30, 1, RED_BALANCE_DEFAULT);
2697 if (!v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS))
2698 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2699 V4L2_CID_SHARPNESS,
2700 0, 0x0f, 1, SHARPNESS_DEFAULT);
2701
2702 /* Reset image controls */
2703 em28xx_colorlevels_set_default(dev);
2704 v4l2_ctrl_handler_setup(hdl);
2705 ret = hdl->error;
2706 if (ret)
2707 goto unregister_dev;
2708
2709 /* allocate and fill video video_device struct */
2710 em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video");
2711 mutex_init(&v4l2->vb_queue_lock);
2712 mutex_init(&v4l2->vb_vbi_queue_lock);
2713 v4l2->vdev.queue = &v4l2->vb_vidq;
2714 v4l2->vdev.queue->lock = &v4l2->vb_queue_lock;
2715
2716 /* disable inapplicable ioctls */
2717 if (dev->is_webcam) {
2718 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD);
2719 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD);
2720 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD);
2721 } else {
2722 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM);
2723 }
2724 if (dev->tuner_type == TUNER_ABSENT) {
2725 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER);
2726 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER);
2727 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY);
2728 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY);
2729 }
2730 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2731 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO);
2732 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO);
2733 }
2734
2735 /* register v4l2 video video_device */
2736 ret = video_register_device(&v4l2->vdev, VFL_TYPE_GRABBER,
2737 video_nr[dev->devno]);
2738 if (ret) {
2739 dev_err(&dev->intf->dev,
2740 "unable to register video device (error=%i).\n", ret);
2741 goto unregister_dev;
2742 }
2743
2744 /* Allocate and fill vbi video_device struct */
2745 if (em28xx_vbi_supported(dev) == 1) {
2746 em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template,
2747 "vbi");
2748
2749 v4l2->vbi_dev.queue = &v4l2->vb_vbiq;
2750 v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock;
2751
2752 /* disable inapplicable ioctls */
2753 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM);
2754 if (dev->tuner_type == TUNER_ABSENT) {
2755 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER);
2756 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER);
2757 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY);
2758 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY);
2759 }
2760 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2761 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO);
2762 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO);
2763 }
2764
2765 /* register v4l2 vbi video_device */
2766 ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI,
2767 vbi_nr[dev->devno]);
2768 if (ret < 0) {
2769 dev_err(&dev->intf->dev,
2770 "unable to register vbi device\n");
2771 goto unregister_dev;
2772 }
2773 }
2774
2775 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2776 em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template,
2777 "radio");
2778 ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO,
2779 radio_nr[dev->devno]);
2780 if (ret < 0) {
2781 dev_err(&dev->intf->dev,
2782 "can't register radio device\n");
2783 goto unregister_dev;
2784 }
2785 dev_info(&dev->intf->dev,
2786 "Registered radio device as %s\n",
2787 video_device_node_name(&v4l2->radio_dev));
2788 }
2789
2790 /* Init entities at the Media Controller */
2791 em28xx_v4l2_create_entities(dev);
2792
2793 #ifdef CONFIG_MEDIA_CONTROLLER
2794 ret = v4l2_mc_create_media_graph(dev->media_dev);
2795 if (ret) {
2796 dev_err(&dev->intf->dev,
2797 "failed to create media graph\n");
2798 em28xx_v4l2_media_release(dev);
2799 goto unregister_dev;
2800 }
2801 #endif
2802
2803 dev_info(&dev->intf->dev,
2804 "V4L2 video device registered as %s\n",
2805 video_device_node_name(&v4l2->vdev));
2806
2807 if (video_is_registered(&v4l2->vbi_dev))
2808 dev_info(&dev->intf->dev,
2809 "V4L2 VBI device registered as %s\n",
2810 video_device_node_name(&v4l2->vbi_dev));
2811
2812 /* Save some power by putting tuner to sleep */
2813 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2814
2815 /* initialize videobuf2 stuff */
2816 em28xx_vb2_setup(dev);
2817
2818 dev_info(&dev->intf->dev,
2819 "V4L2 extension successfully initialized\n");
2820
2821 kref_get(&dev->ref);
2822
2823 mutex_unlock(&dev->lock);
2824 return 0;
2825
2826 unregister_dev:
2827 if (video_is_registered(&v4l2->radio_dev)) {
2828 dev_info(&dev->intf->dev,
2829 "V4L2 device %s deregistered\n",
2830 video_device_node_name(&v4l2->radio_dev));
2831 video_unregister_device(&v4l2->radio_dev);
2832 }
2833 if (video_is_registered(&v4l2->vbi_dev)) {
2834 dev_info(&dev->intf->dev,
2835 "V4L2 device %s deregistered\n",
2836 video_device_node_name(&v4l2->vbi_dev));
2837 video_unregister_device(&v4l2->vbi_dev);
2838 }
2839 if (video_is_registered(&v4l2->vdev)) {
2840 dev_info(&dev->intf->dev,
2841 "V4L2 device %s deregistered\n",
2842 video_device_node_name(&v4l2->vdev));
2843 video_unregister_device(&v4l2->vdev);
2844 }
2845
2846 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2847 v4l2_device_unregister(&v4l2->v4l2_dev);
2848 err:
2849 dev->v4l2 = NULL;
2850 kref_put(&v4l2->ref, em28xx_free_v4l2);
2851 mutex_unlock(&dev->lock);
2852 return ret;
2853 }
2854
2855 static struct em28xx_ops v4l2_ops = {
2856 .id = EM28XX_V4L2,
2857 .name = "Em28xx v4l2 Extension",
2858 .init = em28xx_v4l2_init,
2859 .fini = em28xx_v4l2_fini,
2860 .suspend = em28xx_v4l2_suspend,
2861 .resume = em28xx_v4l2_resume,
2862 };
2863
2864 static int __init em28xx_video_register(void)
2865 {
2866 return em28xx_register_extension(&v4l2_ops);
2867 }
2868
2869 static void __exit em28xx_video_unregister(void)
2870 {
2871 em28xx_unregister_extension(&v4l2_ops);
2872 }
2873
2874 module_init(em28xx_video_register);
2875 module_exit(em28xx_video_unregister);
Linux with added FPC-III support