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drm/rockchip: Don't change hdmi reference clock rate
[drm/drm-misc.git] / drivers / media / usb / em28xx / em28xx-video.c
blob66c09bc6d59ed29328c081c03e0084877ea8d7d0
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 #include "em28xx.h"
16
17 #include <linux/init.h>
18 #include <linux/list.h>
19 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/bitmap.h>
22 #include <linux/usb.h>
23 #include <linux/i2c.h>
24 #include <linux/mm.h>
25 #include <linux/mutex.h>
26 #include <linux/slab.h>
27
28 #include "em28xx-v4l.h"
29 #include <media/v4l2-common.h>
30 #include <media/v4l2-ioctl.h>
31 #include <media/v4l2-event.h>
32 #include <media/drv-intf/msp3400.h>
33 #include <media/tuner.h>
34
35 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
36 "Markus Rechberger <mrechberger@gmail.com>, " \
37 "Mauro Carvalho Chehab <mchehab@kernel.org>, " \
38 "Sascha Sommer <saschasommer@freenet.de>"
39
40 static unsigned int isoc_debug;
41 module_param(isoc_debug, int, 0644);
42 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
43
44 static unsigned int disable_vbi;
45 module_param(disable_vbi, int, 0644);
46 MODULE_PARM_DESC(disable_vbi, "disable vbi support");
47
48 static int alt;
49 module_param(alt, int, 0644);
50 MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");
51
52 #define em28xx_videodbg(fmt, arg...) do { \
53 if (video_debug) \
54 dev_printk(KERN_DEBUG, &dev->intf->dev, \
55 "video: %s: " fmt, __func__, ## arg); \
56 } while (0)
57
58 #define em28xx_isocdbg(fmt, arg...) do {\
59 if (isoc_debug) \
60 dev_printk(KERN_DEBUG, &dev->intf->dev, \
61 "isoc: %s: " fmt, __func__, ## arg); \
62 } while (0)
63
64 MODULE_AUTHOR(DRIVER_AUTHOR);
65 MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface");
66 MODULE_LICENSE("GPL v2");
67 MODULE_VERSION(EM28XX_VERSION);
68
69 #define EM25XX_FRMDATAHDR_BYTE1 0x02
70 #define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE 0x20
71 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_END 0x02
72 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID 0x01
73 #define EM25XX_FRMDATAHDR_BYTE2_MASK (EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \
74 EM25XX_FRMDATAHDR_BYTE2_FRAME_END | \
75 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID)
76
77 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
78 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
79 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
80
81 module_param_array(video_nr, int, NULL, 0444);
82 module_param_array(vbi_nr, int, NULL, 0444);
83 module_param_array(radio_nr, int, NULL, 0444);
84 MODULE_PARM_DESC(video_nr, "video device numbers");
85 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
86 MODULE_PARM_DESC(radio_nr, "radio device numbers");
87
88 static unsigned int video_debug;
89 module_param(video_debug, int, 0644);
90 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
91
92 /* supported video standards */
93 static struct em28xx_fmt format[] = {
94 {
95 .fourcc = V4L2_PIX_FMT_YUYV,
96 .depth = 16,
97 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V,
98 }, {
99 .fourcc = V4L2_PIX_FMT_RGB565,
100 .depth = 16,
101 .reg = EM28XX_OUTFMT_RGB_16_656,
102 }, {
103 .fourcc = V4L2_PIX_FMT_SRGGB8,
104 .depth = 8,
105 .reg = EM28XX_OUTFMT_RGB_8_RGRG,
106 }, {
107 .fourcc = V4L2_PIX_FMT_SBGGR8,
108 .depth = 8,
109 .reg = EM28XX_OUTFMT_RGB_8_BGBG,
110 }, {
111 .fourcc = V4L2_PIX_FMT_SGRBG8,
112 .depth = 8,
113 .reg = EM28XX_OUTFMT_RGB_8_GRGR,
114 }, {
115 .fourcc = V4L2_PIX_FMT_SGBRG8,
116 .depth = 8,
117 .reg = EM28XX_OUTFMT_RGB_8_GBGB,
118 }, {
119 .fourcc = V4L2_PIX_FMT_YUV411P,
120 .depth = 12,
121 .reg = EM28XX_OUTFMT_YUV411,
122 },
123 };
124
125 /*FIXME: maxw should be dependent of alt mode */
126 static inline unsigned int norm_maxw(struct em28xx *dev)
127 {
128 struct em28xx_v4l2 *v4l2 = dev->v4l2;
129
130 if (dev->is_webcam)
131 return v4l2->sensor_xres;
132
133 if (dev->board.max_range_640_480)
134 return 640;
135
136 return 720;
137 }
138
139 static inline unsigned int norm_maxh(struct em28xx *dev)
140 {
141 struct em28xx_v4l2 *v4l2 = dev->v4l2;
142
143 if (dev->is_webcam)
144 return v4l2->sensor_yres;
145
146 if (dev->board.max_range_640_480)
147 return 480;
148
149 return (v4l2->norm & V4L2_STD_625_50) ? 576 : 480;
150 }
151
152 static int em28xx_vbi_supported(struct em28xx *dev)
153 {
154 /* Modprobe option to manually disable */
155 if (disable_vbi == 1)
156 return 0;
157
158 if (dev->is_webcam)
159 return 0;
160
161 /* FIXME: check subdevices for VBI support */
162
163 if (dev->chip_id == CHIP_ID_EM2860 ||
164 dev->chip_id == CHIP_ID_EM2883)
165 return 1;
166
167 /* Version of em28xx that does not support VBI */
168 return 0;
169 }
170
171 /*
172 * em28xx_wake_i2c()
173 * configure i2c attached devices
174 */
175 static void em28xx_wake_i2c(struct em28xx *dev)
176 {
177 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
178
179 v4l2_device_call_all(v4l2_dev, 0, core, reset, 0);
180 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
181 INPUT(dev->ctl_input)->vmux, 0, 0);
182 }
183
184 static int em28xx_colorlevels_set_default(struct em28xx *dev)
185 {
186 em28xx_write_reg(dev, EM28XX_R20_YGAIN, CONTRAST_DEFAULT);
187 em28xx_write_reg(dev, EM28XX_R21_YOFFSET, BRIGHTNESS_DEFAULT);
188 em28xx_write_reg(dev, EM28XX_R22_UVGAIN, SATURATION_DEFAULT);
189 em28xx_write_reg(dev, EM28XX_R23_UOFFSET, BLUE_BALANCE_DEFAULT);
190 em28xx_write_reg(dev, EM28XX_R24_VOFFSET, RED_BALANCE_DEFAULT);
191 em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, SHARPNESS_DEFAULT);
192
193 em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20);
194 em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20);
195 em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20);
196 em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20);
197 em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00);
198 em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00);
199 return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00);
200 }
201
202 static int em28xx_set_outfmt(struct em28xx *dev)
203 {
204 int ret;
205 u8 fmt, vinctrl;
206 struct em28xx_v4l2 *v4l2 = dev->v4l2;
207
208 fmt = v4l2->format->reg;
209 if (!dev->is_em25xx)
210 fmt |= 0x20;
211 /*
212 * NOTE: it's not clear if this is really needed !
213 * The datasheets say bit 5 is a reserved bit and devices seem to work
214 * fine without it. But the Windows driver sets it for em2710/50+em28xx
215 * devices and we've always been setting it, too.
216 *
217 * em2765 (em25xx, em276x/7x/8x) devices do NOT work with this bit set,
218 * it's likely used for an additional (compressed ?) format there.
219 */
220 ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt);
221 if (ret < 0)
222 return ret;
223
224 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, v4l2->vinmode);
225 if (ret < 0)
226 return ret;
227
228 vinctrl = v4l2->vinctl;
229 if (em28xx_vbi_supported(dev) == 1) {
230 vinctrl |= EM28XX_VINCTRL_VBI_RAW;
231 em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00);
232 em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH,
233 v4l2->vbi_width / 4);
234 em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, v4l2->vbi_height);
235 if (v4l2->norm & V4L2_STD_525_60) {
236 /* NTSC */
237 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09);
238 } else if (v4l2->norm & V4L2_STD_625_50) {
239 /* PAL */
240 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07);
241 }
242 }
243
244 return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl);
245 }
246
247 static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax,
248 u8 ymin, u8 ymax)
249 {
250 em28xx_videodbg("em28xx Scale: (%d,%d)-(%d,%d)\n",
251 xmin, ymin, xmax, ymax);
252
253 em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1);
254 em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1);
255 em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1);
256 return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1);
257 }
258
259 static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart,
260 u16 width, u16 height)
261 {
262 u8 cwidth = width >> 2;
263 u8 cheight = height >> 2;
264 u8 overflow = (height >> 9 & 0x02) | (width >> 10 & 0x01);
265 /* NOTE: size limit: 2047x1023 = 2MPix */
266
267 em28xx_videodbg("capture area set to (%d,%d): %dx%d\n",
268 hstart, vstart,
269 ((overflow & 2) << 9 | cwidth << 2),
270 ((overflow & 1) << 10 | cheight << 2));
271
272 em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1);
273 em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1);
274 em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1);
275 em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1);
276 em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1);
277
278 /* FIXME: function/meaning of these registers ? */
279 /* FIXME: align width+height to multiples of 4 ?! */
280 if (dev->is_em25xx) {
281 em28xx_write_reg(dev, 0x34, width >> 4);
282 em28xx_write_reg(dev, 0x35, height >> 4);
283 }
284 }
285
286 static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v)
287 {
288 u8 mode = 0x00;
289 /* the em2800 scaler only supports scaling down to 50% */
290
291 if (dev->board.is_em2800) {
292 mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00);
293 } else {
294 u8 buf[2];
295
296 buf[0] = h;
297 buf[1] = h >> 8;
298 em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2);
299
300 buf[0] = v;
301 buf[1] = v >> 8;
302 em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2);
303 /*
304 * it seems that both H and V scalers must be active
305 * to work correctly
306 */
307 mode = (h || v) ? 0x30 : 0x00;
308 }
309 return em28xx_write_reg(dev, EM28XX_R26_COMPR, mode);
310 }
311
312 /* FIXME: this only function read values from dev */
313 static int em28xx_resolution_set(struct em28xx *dev)
314 {
315 struct em28xx_v4l2 *v4l2 = dev->v4l2;
316 int width = norm_maxw(dev);
317 int height = norm_maxh(dev);
318
319 /* Properly setup VBI */
320 v4l2->vbi_width = 720;
321 if (v4l2->norm & V4L2_STD_525_60)
322 v4l2->vbi_height = 12;
323 else
324 v4l2->vbi_height = 18;
325
326 em28xx_set_outfmt(dev);
327
328 em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2);
329
330 /*
331 * If we don't set the start position to 2 in VBI mode, we end up
332 * with line 20/21 being YUYV encoded instead of being in 8-bit
333 * greyscale. The core of the issue is that line 21 (and line 23 for
334 * PAL WSS) are inside of active video region, and as a result they
335 * get the pixelformatting associated with that area. So by cropping
336 * it out, we end up with the same format as the rest of the VBI
337 * region
338 */
339 if (em28xx_vbi_supported(dev) == 1)
340 em28xx_capture_area_set(dev, 0, 2, width, height);
341 else
342 em28xx_capture_area_set(dev, 0, 0, width, height);
343
344 return em28xx_scaler_set(dev, v4l2->hscale, v4l2->vscale);
345 }
346
347 /* Set USB alternate setting for analog video */
348 static int em28xx_set_alternate(struct em28xx *dev)
349 {
350 struct em28xx_v4l2 *v4l2 = dev->v4l2;
351 struct usb_device *udev = interface_to_usbdev(dev->intf);
352 int err;
353 int i;
354 unsigned int min_pkt_size = v4l2->width * 2 + 4;
355
356 /*
357 * NOTE: for isoc transfers, only alt settings > 0 are allowed
358 * bulk transfers seem to work only with alt=0 !
359 */
360 dev->alt = 0;
361 if (alt > 0 && alt < dev->num_alt) {
362 em28xx_videodbg("alternate forced to %d\n", dev->alt);
363 dev->alt = alt;
364 goto set_alt;
365 }
366 if (dev->analog_xfer_bulk)
367 goto set_alt;
368
369 /*
370 * When image size is bigger than a certain value,
371 * the frame size should be increased, otherwise, only
372 * green screen will be received.
373 */
374 if (v4l2->width * 2 * v4l2->height > 720 * 240 * 2)
375 min_pkt_size *= 2;
376
377 for (i = 0; i < dev->num_alt; i++) {
378 /* stop when the selected alt setting offers enough bandwidth */
379 if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) {
380 dev->alt = i;
381 break;
382 /*
383 * otherwise make sure that we end up with the maximum
384 * bandwidth because the min_pkt_size equation might be wrong.
385 *
386 */
387 } else if (dev->alt_max_pkt_size_isoc[i] >
388 dev->alt_max_pkt_size_isoc[dev->alt])
389 dev->alt = i;
390 }
391
392 set_alt:
393 /*
394 * NOTE: for bulk transfers, we need to call usb_set_interface()
395 * even if the previous settings were the same. Otherwise streaming
396 * fails with all urbs having status = -EOVERFLOW !
397 */
398 if (dev->analog_xfer_bulk) {
399 dev->max_pkt_size = 512; /* USB 2.0 spec */
400 dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER;
401 } else { /* isoc */
402 em28xx_videodbg("minimum isoc packet size: %u (alt=%d)\n",
403 min_pkt_size, dev->alt);
404 dev->max_pkt_size =
405 dev->alt_max_pkt_size_isoc[dev->alt];
406 dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS;
407 }
408 em28xx_videodbg("setting alternate %d with wMaxPacketSize=%u\n",
409 dev->alt, dev->max_pkt_size);
410 err = usb_set_interface(udev, dev->ifnum, dev->alt);
411 if (err < 0) {
412 dev_err(&dev->intf->dev,
413 "cannot change alternate number to %d (error=%i)\n",
414 dev->alt, err);
415 return err;
416 }
417 return 0;
418 }
419
420 /*
421 * DMA and thread functions
422 */
423
424 /*
425 * Finish the current buffer
426 */
427 static inline void finish_buffer(struct em28xx *dev,
428 struct em28xx_buffer *buf)
429 {
430 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
431
432 buf->vb.sequence = dev->v4l2->field_count++;
433 if (dev->v4l2->progressive)
434 buf->vb.field = V4L2_FIELD_NONE;
435 else
436 buf->vb.field = V4L2_FIELD_INTERLACED;
437 buf->vb.vb2_buf.timestamp = ktime_get_ns();
438
439 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
440 }
441
442 /*
443 * Copy picture data from USB buffer to video buffer
444 */
445 static void em28xx_copy_video(struct em28xx *dev,
446 struct em28xx_buffer *buf,
447 unsigned char *usb_buf,
448 unsigned long len)
449 {
450 struct em28xx_v4l2 *v4l2 = dev->v4l2;
451 void *fieldstart, *startwrite, *startread;
452 int linesdone, currlinedone, offset, lencopy, remain;
453 int bytesperline = v4l2->width << 1;
454
455 if (buf->pos + len > buf->length)
456 len = buf->length - buf->pos;
457
458 startread = usb_buf;
459 remain = len;
460
461 if (v4l2->progressive || buf->top_field)
462 fieldstart = buf->vb_buf;
463 else /* interlaced mode, even nr. of lines */
464 fieldstart = buf->vb_buf + bytesperline;
465
466 linesdone = buf->pos / bytesperline;
467 currlinedone = buf->pos % bytesperline;
468
469 if (v4l2->progressive)
470 offset = linesdone * bytesperline + currlinedone;
471 else
472 offset = linesdone * bytesperline * 2 + currlinedone;
473
474 startwrite = fieldstart + offset;
475 lencopy = bytesperline - currlinedone;
476 lencopy = lencopy > remain ? remain : lencopy;
477
478 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) {
479 em28xx_isocdbg("Overflow of %zu bytes past buffer end (1)\n",
480 ((char *)startwrite + lencopy) -
481 ((char *)buf->vb_buf + buf->length));
482 remain = (char *)buf->vb_buf + buf->length -
483 (char *)startwrite;
484 lencopy = remain;
485 }
486 if (lencopy <= 0)
487 return;
488 memcpy(startwrite, startread, lencopy);
489
490 remain -= lencopy;
491
492 while (remain > 0) {
493 if (v4l2->progressive)
494 startwrite += lencopy;
495 else
496 startwrite += lencopy + bytesperline;
497 startread += lencopy;
498 if (bytesperline > remain)
499 lencopy = remain;
500 else
501 lencopy = bytesperline;
502
503 if ((char *)startwrite + lencopy > (char *)buf->vb_buf +
504 buf->length) {
505 em28xx_isocdbg("Overflow of %zu bytes past buffer end(2)\n",
506 ((char *)startwrite + lencopy) -
507 ((char *)buf->vb_buf + buf->length));
508 remain = (char *)buf->vb_buf + buf->length -
509 (char *)startwrite;
510 lencopy = remain;
511 }
512 if (lencopy <= 0)
513 break;
514
515 memcpy(startwrite, startread, lencopy);
516
517 remain -= lencopy;
518 }
519
520 buf->pos += len;
521 }
522
523 /*
524 * Copy VBI data from USB buffer to video buffer
525 */
526 static void em28xx_copy_vbi(struct em28xx *dev,
527 struct em28xx_buffer *buf,
528 unsigned char *usb_buf,
529 unsigned long len)
530 {
531 unsigned int offset;
532
533 if (buf->pos + len > buf->length)
534 len = buf->length - buf->pos;
535
536 offset = buf->pos;
537 /* Make sure the bottom field populates the second half of the frame */
538 if (buf->top_field == 0)
539 offset += dev->v4l2->vbi_width * dev->v4l2->vbi_height;
540
541 memcpy(buf->vb_buf + offset, usb_buf, len);
542 buf->pos += len;
543 }
544
545 static inline void print_err_status(struct em28xx *dev,
546 int packet, int status)
547 {
548 char *errmsg = "Unknown";
549
550 switch (status) {
551 case -ENOENT:
552 errmsg = "unlinked synchronously";
553 break;
554 case -ECONNRESET:
555 errmsg = "unlinked asynchronously";
556 break;
557 case -ENOSR:
558 errmsg = "Buffer error (overrun)";
559 break;
560 case -EPIPE:
561 errmsg = "Stalled (device not responding)";
562 break;
563 case -EOVERFLOW:
564 errmsg = "Babble (bad cable?)";
565 break;
566 case -EPROTO:
567 errmsg = "Bit-stuff error (bad cable?)";
568 break;
569 case -EILSEQ:
570 errmsg = "CRC/Timeout (could be anything)";
571 break;
572 case -ETIME:
573 errmsg = "Device does not respond";
574 break;
575 }
576 if (packet < 0) {
577 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
578 } else {
579 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
580 packet, status, errmsg);
581 }
582 }
583
584 /*
585 * get the next available buffer from dma queue
586 */
587 static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev,
588 struct em28xx_dmaqueue *dma_q)
589 {
590 struct em28xx_buffer *buf;
591
592 if (list_empty(&dma_q->active)) {
593 em28xx_isocdbg("No active queue to serve\n");
594 return NULL;
595 }
596
597 /* Get the next buffer */
598 buf = list_entry(dma_q->active.next, struct em28xx_buffer, list);
599 /* Cleans up buffer - Useful for testing for frame/URB loss */
600 list_del(&buf->list);
601 buf->pos = 0;
602 buf->vb_buf = buf->mem;
603
604 return buf;
605 }
606
607 /*
608 * Finish the current buffer if completed and prepare for the next field
609 */
610 static struct em28xx_buffer *
611 finish_field_prepare_next(struct em28xx *dev,
612 struct em28xx_buffer *buf,
613 struct em28xx_dmaqueue *dma_q)
614 {
615 struct em28xx_v4l2 *v4l2 = dev->v4l2;
616
617 if (v4l2->progressive || v4l2->top_field) { /* Brand new frame */
618 if (buf)
619 finish_buffer(dev, buf);
620 buf = get_next_buf(dev, dma_q);
621 }
622 if (buf) {
623 buf->top_field = v4l2->top_field;
624 buf->pos = 0;
625 }
626
627 return buf;
628 }
629
630 /*
631 * Process data packet according to the em2710/em2750/em28xx frame data format
632 */
633 static inline void process_frame_data_em28xx(struct em28xx *dev,
634 unsigned char *data_pkt,
635 unsigned int data_len)
636 {
637 struct em28xx_v4l2 *v4l2 = dev->v4l2;
638 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
639 struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf;
640 struct em28xx_dmaqueue *dma_q = &dev->vidq;
641 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
642
643 /*
644 * capture type 0 = vbi start
645 * capture type 1 = vbi in progress
646 * capture type 2 = video start
647 * capture type 3 = video in progress
648 */
649 if (data_len >= 4) {
650 /*
651 * NOTE: Headers are always 4 bytes and
652 * never split across packets
653 */
654 if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 &&
655 data_pkt[2] == 0x88 && data_pkt[3] == 0x88) {
656 /* Continuation */
657 data_pkt += 4;
658 data_len -= 4;
659 } else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) {
660 /* Field start (VBI mode) */
661 v4l2->capture_type = 0;
662 v4l2->vbi_read = 0;
663 em28xx_isocdbg("VBI START HEADER !!!\n");
664 v4l2->top_field = !(data_pkt[2] & 1);
665 data_pkt += 4;
666 data_len -= 4;
667 } else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) {
668 /* Field start (VBI disabled) */
669 v4l2->capture_type = 2;
670 em28xx_isocdbg("VIDEO START HEADER !!!\n");
671 v4l2->top_field = !(data_pkt[2] & 1);
672 data_pkt += 4;
673 data_len -= 4;
674 }
675 }
676 /*
677 * NOTE: With bulk transfers, intermediate data packets
678 * have no continuation header
679 */
680
681 if (v4l2->capture_type == 0) {
682 vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q);
683 dev->usb_ctl.vbi_buf = vbi_buf;
684 v4l2->capture_type = 1;
685 }
686
687 if (v4l2->capture_type == 1) {
688 int vbi_size = v4l2->vbi_width * v4l2->vbi_height;
689 int vbi_data_len = ((v4l2->vbi_read + data_len) > vbi_size) ?
690 (vbi_size - v4l2->vbi_read) : data_len;
691
692 /* Copy VBI data */
693 if (vbi_buf)
694 em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len);
695 v4l2->vbi_read += vbi_data_len;
696
697 if (vbi_data_len < data_len) {
698 /* Continue with copying video data */
699 v4l2->capture_type = 2;
700 data_pkt += vbi_data_len;
701 data_len -= vbi_data_len;
702 }
703 }
704
705 if (v4l2->capture_type == 2) {
706 buf = finish_field_prepare_next(dev, buf, dma_q);
707 dev->usb_ctl.vid_buf = buf;
708 v4l2->capture_type = 3;
709 }
710
711 if (v4l2->capture_type == 3 && buf && data_len > 0)
712 em28xx_copy_video(dev, buf, data_pkt, data_len);
713 }
714
715 /*
716 * Process data packet according to the em25xx/em276x/7x/8x frame data format
717 */
718 static inline void process_frame_data_em25xx(struct em28xx *dev,
719 unsigned char *data_pkt,
720 unsigned int data_len)
721 {
722 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
723 struct em28xx_dmaqueue *dmaq = &dev->vidq;
724 struct em28xx_v4l2 *v4l2 = dev->v4l2;
725 bool frame_end = false;
726
727 /* Check for header */
728 /*
729 * NOTE: at least with bulk transfers, only the first packet
730 * has a header and has always set the FRAME_END bit
731 */
732 if (data_len >= 2) { /* em25xx header is only 2 bytes long */
733 if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) &&
734 ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) {
735 v4l2->top_field = !(data_pkt[1] &
736 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID);
737 frame_end = data_pkt[1] &
738 EM25XX_FRMDATAHDR_BYTE2_FRAME_END;
739 data_pkt += 2;
740 data_len -= 2;
741 }
742
743 /* Finish field and prepare next (BULK only) */
744 if (dev->analog_xfer_bulk && frame_end) {
745 buf = finish_field_prepare_next(dev, buf, dmaq);
746 dev->usb_ctl.vid_buf = buf;
747 }
748 /*
749 * NOTE: in ISOC mode when a new frame starts and buf==NULL,
750 * we COULD already prepare a buffer here to avoid skipping the
751 * first frame.
752 */
753 }
754
755 /* Copy data */
756 if (buf && data_len > 0)
757 em28xx_copy_video(dev, buf, data_pkt, data_len);
758
759 /* Finish frame (ISOC only) => avoids lag of 1 frame */
760 if (!dev->analog_xfer_bulk && frame_end) {
761 buf = finish_field_prepare_next(dev, buf, dmaq);
762 dev->usb_ctl.vid_buf = buf;
763 }
764
765 /*
766 * NOTES:
767 *
768 * 1) Tested with USB bulk transfers only !
769 * The wording in the datasheet suggests that isoc might work different.
770 * The current code assumes that with isoc transfers each packet has a
771 * header like with the other em28xx devices.
772 *
773 * 2) Support for interlaced mode is pure theory. It has not been
774 * tested and it is unknown if these devices actually support it.
775 */
776 }
777
778 /* Processes and copies the URB data content (video and VBI data) */
779 static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb)
780 {
781 int xfer_bulk, num_packets, i;
782 unsigned char *usb_data_pkt;
783 unsigned int usb_data_len;
784
785 if (!dev)
786 return 0;
787
788 if (dev->disconnected)
789 return 0;
790
791 if (urb->status < 0)
792 print_err_status(dev, -1, urb->status);
793
794 xfer_bulk = usb_pipebulk(urb->pipe);
795
796 if (xfer_bulk) /* bulk */
797 num_packets = 1;
798 else /* isoc */
799 num_packets = urb->number_of_packets;
800
801 for (i = 0; i < num_packets; i++) {
802 if (xfer_bulk) { /* bulk */
803 usb_data_len = urb->actual_length;
804
805 usb_data_pkt = urb->transfer_buffer;
806 } else { /* isoc */
807 if (urb->iso_frame_desc[i].status < 0) {
808 print_err_status(dev, i,
809 urb->iso_frame_desc[i].status);
810 if (urb->iso_frame_desc[i].status != -EPROTO)
811 continue;
812 }
813
814 usb_data_len = urb->iso_frame_desc[i].actual_length;
815 if (usb_data_len > dev->max_pkt_size) {
816 em28xx_isocdbg("packet bigger than packet size");
817 continue;
818 }
819
820 usb_data_pkt = urb->transfer_buffer +
821 urb->iso_frame_desc[i].offset;
822 }
823
824 if (usb_data_len == 0) {
825 /* NOTE: happens very often with isoc transfers */
826 /* em28xx_usbdbg("packet %d is empty",i); - spammy */
827 continue;
828 }
829
830 if (dev->is_em25xx)
831 process_frame_data_em25xx(dev,
832 usb_data_pkt, usb_data_len);
833 else
834 process_frame_data_em28xx(dev,
835 usb_data_pkt, usb_data_len);
836 }
837 return 1;
838 }
839
840 static int get_resource(enum v4l2_buf_type f_type)
841 {
842 switch (f_type) {
843 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
844 return EM28XX_RESOURCE_VIDEO;
845 case V4L2_BUF_TYPE_VBI_CAPTURE:
846 return EM28XX_RESOURCE_VBI;
847 default:
848 WARN_ON(1);
849 return -1; /* Indicate that device is busy */
850 }
851 }
852
853 /* Usage lock check functions */
854 static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type)
855 {
856 int res_type = get_resource(f_type);
857
858 /* is it free? */
859 if (dev->resources & res_type) {
860 /* no, someone else uses it */
861 return -EBUSY;
862 }
863
864 /* it's free, grab it */
865 dev->resources |= res_type;
866 em28xx_videodbg("res: get %d\n", res_type);
867 return 0;
868 }
869
870 static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type)
871 {
872 int res_type = get_resource(f_type);
873
874 dev->resources &= ~res_type;
875 em28xx_videodbg("res: put %d\n", res_type);
876 }
877
878 static void em28xx_v4l2_media_release(struct em28xx *dev)
879 {
880 #ifdef CONFIG_MEDIA_CONTROLLER
881 int i;
882
883 for (i = 0; i < MAX_EM28XX_INPUT; i++) {
884 if (!INPUT(i)->type)
885 return;
886 media_device_unregister_entity(&dev->input_ent[i]);
887 }
888 #endif
889 }
890
891 /*
892 * Media Controller helper functions
893 */
894
895 static int em28xx_enable_analog_tuner(struct em28xx *dev)
896 {
897 #ifdef CONFIG_MEDIA_CONTROLLER
898 struct media_device *mdev = dev->media_dev;
899 struct em28xx_v4l2 *v4l2 = dev->v4l2;
900 struct media_entity *source;
901 struct media_link *link, *found_link = NULL;
902 int ret, active_links = 0;
903
904 if (!mdev || !v4l2->decoder)
905 return 0;
906
907 /*
908 * This will find the tuner that is connected into the decoder.
909 * Technically, this is not 100% correct, as the device may be
910 * using an analog input instead of the tuner. However, as we can't
911 * do DVB streaming while the DMA engine is being used for V4L2,
912 * this should be enough for the actual needs.
913 */
914 list_for_each_entry(link, &v4l2->decoder->links, list) {
915 if (link->sink->entity == v4l2->decoder) {
916 found_link = link;
917 if (link->flags & MEDIA_LNK_FL_ENABLED)
918 active_links++;
919 break;
920 }
921 }
922
923 if (active_links == 1 || !found_link)
924 return 0;
925
926 source = found_link->source->entity;
927 list_for_each_entry(link, &source->links, list) {
928 struct media_entity *sink;
929 int flags = 0;
930
931 sink = link->sink->entity;
932
933 if (sink == v4l2->decoder)
934 flags = MEDIA_LNK_FL_ENABLED;
935
936 ret = media_entity_setup_link(link, flags);
937 if (ret) {
938 dev_err(&dev->intf->dev,
939 "Couldn't change link %s->%s to %s. Error %d\n",
940 source->name, sink->name,
941 flags ? "enabled" : "disabled",
942 ret);
943 return ret;
944 }
945
946 em28xx_videodbg("link %s->%s was %s\n",
947 source->name, sink->name,
948 flags ? "ENABLED" : "disabled");
949 }
950 #endif
951 return 0;
952 }
953
954 static const char * const iname[] = {
955 [EM28XX_VMUX_COMPOSITE] = "Composite",
956 [EM28XX_VMUX_SVIDEO] = "S-Video",
957 [EM28XX_VMUX_TELEVISION] = "Television",
958 [EM28XX_RADIO] = "Radio",
959 };
960
961 static void em28xx_v4l2_create_entities(struct em28xx *dev)
962 {
963 #if defined(CONFIG_MEDIA_CONTROLLER)
964 struct em28xx_v4l2 *v4l2 = dev->v4l2;
965 int ret, i;
966
967 /* Initialize Video, VBI and Radio pads */
968 v4l2->video_pad.flags = MEDIA_PAD_FL_SINK;
969 ret = media_entity_pads_init(&v4l2->vdev.entity, 1, &v4l2->video_pad);
970 if (ret < 0)
971 dev_err(&dev->intf->dev,
972 "failed to initialize video media entity!\n");
973
974 if (em28xx_vbi_supported(dev)) {
975 v4l2->vbi_pad.flags = MEDIA_PAD_FL_SINK;
976 ret = media_entity_pads_init(&v4l2->vbi_dev.entity, 1,
977 &v4l2->vbi_pad);
978 if (ret < 0)
979 dev_err(&dev->intf->dev,
980 "failed to initialize vbi media entity!\n");
981 }
982
983 /* Webcams don't have input connectors */
984 if (dev->is_webcam)
985 return;
986
987 /* Create entities for each input connector */
988 for (i = 0; i < MAX_EM28XX_INPUT; i++) {
989 struct media_entity *ent = &dev->input_ent[i];
990
991 if (!INPUT(i)->type)
992 break;
993
994 ent->name = iname[INPUT(i)->type];
995 ent->flags = MEDIA_ENT_FL_CONNECTOR;
996 dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;
997
998 switch (INPUT(i)->type) {
999 case EM28XX_VMUX_COMPOSITE:
1000 ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
1001 break;
1002 case EM28XX_VMUX_SVIDEO:
1003 ent->function = MEDIA_ENT_F_CONN_SVIDEO;
1004 break;
1005 default: /* EM28XX_VMUX_TELEVISION or EM28XX_RADIO */
1006 if (dev->tuner_type != TUNER_ABSENT)
1007 ent->function = MEDIA_ENT_F_CONN_RF;
1008 break;
1009 }
1010
1011 ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
1012 if (ret < 0)
1013 dev_err(&dev->intf->dev,
1014 "failed to initialize input pad[%d]!\n", i);
1015
1016 ret = media_device_register_entity(dev->media_dev, ent);
1017 if (ret < 0)
1018 dev_err(&dev->intf->dev,
1019 "failed to register input entity %d!\n", i);
1020 }
1021 #endif
1022 }
1023
1024 /*
1025 * Videobuf2 operations
1026 */
1027
1028 static int queue_setup(struct vb2_queue *vq,
1029 unsigned int *nbuffers, unsigned int *nplanes,
1030 unsigned int sizes[], struct device *alloc_devs[])
1031 {
1032 struct em28xx *dev = vb2_get_drv_priv(vq);
1033 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1034 unsigned long size =
1035 (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;
1036
1037 if (*nplanes)
1038 return sizes[0] < size ? -EINVAL : 0;
1039 *nplanes = 1;
1040 sizes[0] = size;
1041
1042 em28xx_enable_analog_tuner(dev);
1043
1044 return 0;
1045 }
1046
1047 static int
1048 buffer_prepare(struct vb2_buffer *vb)
1049 {
1050 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1051 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
1052 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1053 unsigned long size;
1054
1055 em28xx_videodbg("%s, field=%d\n", __func__, vbuf->field);
1056
1057 size = (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;
1058
1059 if (vb2_plane_size(vb, 0) < size) {
1060 em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n",
1061 __func__, vb2_plane_size(vb, 0), size);
1062 return -EINVAL;
1063 }
1064 vb2_set_plane_payload(vb, 0, size);
1065
1066 return 0;
1067 }
1068
1069 int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
1070 {
1071 struct em28xx *dev = vb2_get_drv_priv(vq);
1072 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1073 struct v4l2_frequency f;
1074 struct v4l2_fh *owner;
1075 int rc = 0;
1076
1077 em28xx_videodbg("%s\n", __func__);
1078
1079 dev->v4l2->field_count = 0;
1080
1081 /*
1082 * Make sure streaming is not already in progress for this type
1083 * of filehandle (e.g. video, vbi)
1084 */
1085 rc = res_get(dev, vq->type);
1086 if (rc)
1087 return rc;
1088
1089 if (v4l2->streaming_users == 0) {
1090 /* First active streaming user, so allocate all the URBs */
1091
1092 /* Allocate the USB bandwidth */
1093 em28xx_set_alternate(dev);
1094
1095 /*
1096 * Needed, since GPIO might have disabled power of
1097 * some i2c device
1098 */
1099 em28xx_wake_i2c(dev);
1100
1101 v4l2->capture_type = -1;
1102 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE,
1103 dev->analog_xfer_bulk,
1104 EM28XX_NUM_BUFS,
1105 dev->max_pkt_size,
1106 dev->packet_multiplier,
1107 em28xx_urb_data_copy);
1108 if (rc < 0)
1109 return rc;
1110
1111 /*
1112 * djh: it's not clear whether this code is still needed. I'm
1113 * leaving it in here for now entirely out of concern for
1114 * backward compatibility (the old code did it)
1115 */
1116
1117 /* Ask tuner to go to analog or radio mode */
1118 memset(&f, 0, sizeof(f));
1119 f.frequency = v4l2->frequency;
1120 owner = (struct v4l2_fh *)vq->owner;
1121 if (owner && owner->vdev->vfl_type == VFL_TYPE_RADIO)
1122 f.type = V4L2_TUNER_RADIO;
1123 else
1124 f.type = V4L2_TUNER_ANALOG_TV;
1125 v4l2_device_call_all(&v4l2->v4l2_dev,
1126 0, tuner, s_frequency, &f);
1127
1128 /* Enable video stream at TV decoder */
1129 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 1);
1130 }
1131
1132 v4l2->streaming_users++;
1133
1134 return rc;
1135 }
1136
1137 static void em28xx_stop_streaming(struct vb2_queue *vq)
1138 {
1139 struct em28xx *dev = vb2_get_drv_priv(vq);
1140 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1141 struct em28xx_dmaqueue *vidq = &dev->vidq;
1142 unsigned long flags = 0;
1143
1144 em28xx_videodbg("%s\n", __func__);
1145
1146 res_free(dev, vq->type);
1147
1148 if (v4l2->streaming_users-- == 1) {
1149 /* Disable video stream at TV decoder */
1150 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0);
1151
1152 /* Last active user, so shutdown all the URBS */
1153 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1154 }
1155
1156 spin_lock_irqsave(&dev->slock, flags);
1157 if (dev->usb_ctl.vid_buf) {
1158 vb2_buffer_done(&dev->usb_ctl.vid_buf->vb.vb2_buf,
1159 VB2_BUF_STATE_ERROR);
1160 dev->usb_ctl.vid_buf = NULL;
1161 }
1162 while (!list_empty(&vidq->active)) {
1163 struct em28xx_buffer *buf;
1164
1165 buf = list_entry(vidq->active.next, struct em28xx_buffer, list);
1166 list_del(&buf->list);
1167 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1168 }
1169 spin_unlock_irqrestore(&dev->slock, flags);
1170 }
1171
1172 void em28xx_stop_vbi_streaming(struct vb2_queue *vq)
1173 {
1174 struct em28xx *dev = vb2_get_drv_priv(vq);
1175 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1176 struct em28xx_dmaqueue *vbiq = &dev->vbiq;
1177 unsigned long flags = 0;
1178
1179 em28xx_videodbg("%s\n", __func__);
1180
1181 res_free(dev, vq->type);
1182
1183 if (v4l2->streaming_users-- == 1) {
1184 /* Disable video stream at TV decoder */
1185 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0);
1186
1187 /* Last active user, so shutdown all the URBS */
1188 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1189 }
1190
1191 spin_lock_irqsave(&dev->slock, flags);
1192 if (dev->usb_ctl.vbi_buf) {
1193 vb2_buffer_done(&dev->usb_ctl.vbi_buf->vb.vb2_buf,
1194 VB2_BUF_STATE_ERROR);
1195 dev->usb_ctl.vbi_buf = NULL;
1196 }
1197 while (!list_empty(&vbiq->active)) {
1198 struct em28xx_buffer *buf;
1199
1200 buf = list_entry(vbiq->active.next, struct em28xx_buffer, list);
1201 list_del(&buf->list);
1202 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1203 }
1204 spin_unlock_irqrestore(&dev->slock, flags);
1205 }
1206
1207 static void
1208 buffer_queue(struct vb2_buffer *vb)
1209 {
1210 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1211 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
1212 struct em28xx_buffer *buf =
1213 container_of(vbuf, struct em28xx_buffer, vb);
1214 struct em28xx_dmaqueue *vidq = &dev->vidq;
1215 unsigned long flags = 0;
1216
1217 em28xx_videodbg("%s\n", __func__);
1218 buf->mem = vb2_plane_vaddr(vb, 0);
1219 buf->length = vb2_plane_size(vb, 0);
1220
1221 spin_lock_irqsave(&dev->slock, flags);
1222 list_add_tail(&buf->list, &vidq->active);
1223 spin_unlock_irqrestore(&dev->slock, flags);
1224 }
1225
1226 static const struct vb2_ops em28xx_video_qops = {
1227 .queue_setup = queue_setup,
1228 .buf_prepare = buffer_prepare,
1229 .buf_queue = buffer_queue,
1230 .start_streaming = em28xx_start_analog_streaming,
1231 .stop_streaming = em28xx_stop_streaming,
1232 };
1233
1234 static int em28xx_vb2_setup(struct em28xx *dev)
1235 {
1236 int rc;
1237 struct vb2_queue *q;
1238 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1239
1240 /* Setup Videobuf2 for Video capture */
1241 q = &v4l2->vb_vidq;
1242 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1243 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1244 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1245 q->drv_priv = dev;
1246 q->buf_struct_size = sizeof(struct em28xx_buffer);
1247 q->ops = &em28xx_video_qops;
1248 q->mem_ops = &vb2_vmalloc_memops;
1249
1250 rc = vb2_queue_init(q);
1251 if (rc < 0)
1252 return rc;
1253
1254 /* Setup Videobuf2 for VBI capture */
1255 q = &v4l2->vb_vbiq;
1256 q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1257 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
1258 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1259 q->drv_priv = dev;
1260 q->buf_struct_size = sizeof(struct em28xx_buffer);
1261 q->ops = &em28xx_vbi_qops;
1262 q->mem_ops = &vb2_vmalloc_memops;
1263
1264 rc = vb2_queue_init(q);
1265 if (rc < 0)
1266 return rc;
1267
1268 return 0;
1269 }
1270
1271 /*
1272 * v4l2 interface
1273 */
1274
1275 static void video_mux(struct em28xx *dev, int index)
1276 {
1277 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
1278
1279 dev->ctl_input = index;
1280 dev->ctl_ainput = INPUT(index)->amux;
1281 dev->ctl_aoutput = INPUT(index)->aout;
1282
1283 if (!dev->ctl_aoutput)
1284 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1285
1286 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
1287 INPUT(index)->vmux, 0, 0);
1288
1289 if (dev->has_msp34xx) {
1290 if (dev->i2s_speed) {
1291 v4l2_device_call_all(v4l2_dev, 0, audio,
1292 s_i2s_clock_freq, dev->i2s_speed);
1293 }
1294 /* Note: this is msp3400 specific */
1295 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1296 dev->ctl_ainput,
1297 MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
1298 }
1299
1300 if (dev->board.adecoder != EM28XX_NOADECODER) {
1301 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1302 dev->ctl_ainput, dev->ctl_aoutput, 0);
1303 }
1304
1305 em28xx_audio_analog_set(dev);
1306 }
1307
1308 static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv)
1309 {
1310 struct em28xx *dev = priv;
1311
1312 /*
1313 * In the case of non-AC97 volume controls, we still need
1314 * to do some setups at em28xx, in order to mute/unmute
1315 * and to adjust audio volume. However, the value ranges
1316 * should be checked by the corresponding V4L subdriver.
1317 */
1318 switch (ctrl->id) {
1319 case V4L2_CID_AUDIO_MUTE:
1320 dev->mute = ctrl->val;
1321 em28xx_audio_analog_set(dev);
1322 break;
1323 case V4L2_CID_AUDIO_VOLUME:
1324 dev->volume = ctrl->val;
1325 em28xx_audio_analog_set(dev);
1326 break;
1327 }
1328 }
1329
1330 static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl)
1331 {
1332 struct em28xx_v4l2 *v4l2 =
1333 container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler);
1334 struct em28xx *dev = v4l2->dev;
1335 int ret = -EINVAL;
1336
1337 switch (ctrl->id) {
1338 case V4L2_CID_AUDIO_MUTE:
1339 dev->mute = ctrl->val;
1340 ret = em28xx_audio_analog_set(dev);
1341 break;
1342 case V4L2_CID_AUDIO_VOLUME:
1343 dev->volume = ctrl->val;
1344 ret = em28xx_audio_analog_set(dev);
1345 break;
1346 case V4L2_CID_CONTRAST:
1347 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val);
1348 break;
1349 case V4L2_CID_BRIGHTNESS:
1350 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val);
1351 break;
1352 case V4L2_CID_SATURATION:
1353 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val);
1354 break;
1355 case V4L2_CID_BLUE_BALANCE:
1356 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val);
1357 break;
1358 case V4L2_CID_RED_BALANCE:
1359 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val);
1360 break;
1361 case V4L2_CID_SHARPNESS:
1362 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val);
1363 break;
1364 }
1365
1366 return (ret < 0) ? ret : 0;
1367 }
1368
1369 static const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
1370 .s_ctrl = em28xx_s_ctrl,
1371 };
1372
1373 static void size_to_scale(struct em28xx *dev,
1374 unsigned int width, unsigned int height,
1375 unsigned int *hscale, unsigned int *vscale)
1376 {
1377 unsigned int maxw = norm_maxw(dev);
1378 unsigned int maxh = norm_maxh(dev);
1379
1380 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1381 if (*hscale > EM28XX_HVSCALE_MAX)
1382 *hscale = EM28XX_HVSCALE_MAX;
1383
1384 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1385 if (*vscale > EM28XX_HVSCALE_MAX)
1386 *vscale = EM28XX_HVSCALE_MAX;
1387 }
1388
1389 static void scale_to_size(struct em28xx *dev,
1390 unsigned int hscale, unsigned int vscale,
1391 unsigned int *width, unsigned int *height)
1392 {
1393 unsigned int maxw = norm_maxw(dev);
1394 unsigned int maxh = norm_maxh(dev);
1395
1396 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1397 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1398
1399 /* Don't let width or height to be zero */
1400 if (*width < 1)
1401 *width = 1;
1402 if (*height < 1)
1403 *height = 1;
1404 }
1405
1406 /*
1407 * IOCTL vidioc handling
1408 */
1409
1410 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1411 struct v4l2_format *f)
1412 {
1413 struct em28xx *dev = video_drvdata(file);
1414 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1415
1416 f->fmt.pix.width = v4l2->width;
1417 f->fmt.pix.height = v4l2->height;
1418 f->fmt.pix.pixelformat = v4l2->format->fourcc;
1419 f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3;
1420 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height;
1421 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1422
1423 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1424 if (v4l2->progressive)
1425 f->fmt.pix.field = V4L2_FIELD_NONE;
1426 else
1427 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1428 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1429 return 0;
1430 }
1431
1432 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1433 {
1434 unsigned int i;
1435
1436 for (i = 0; i < ARRAY_SIZE(format); i++)
1437 if (format[i].fourcc == fourcc)
1438 return &format[i];
1439
1440 return NULL;
1441 }
1442
1443 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1444 struct v4l2_format *f)
1445 {
1446 struct em28xx *dev = video_drvdata(file);
1447 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1448 unsigned int width = f->fmt.pix.width;
1449 unsigned int height = f->fmt.pix.height;
1450 unsigned int maxw = norm_maxw(dev);
1451 unsigned int maxh = norm_maxh(dev);
1452 unsigned int hscale, vscale;
1453 struct em28xx_fmt *fmt;
1454
1455 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1456 if (!fmt) {
1457 fmt = &format[0];
1458 em28xx_videodbg("Fourcc format (%08x) invalid. Using default (%08x).\n",
1459 f->fmt.pix.pixelformat, fmt->fourcc);
1460 }
1461
1462 if (dev->board.is_em2800) {
1463 /* the em2800 can only scale down to 50% */
1464 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1465 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1466 /*
1467 * MaxPacketSize for em2800 is too small to capture at full
1468 * resolution use half of maxw as the scaler can only scale
1469 * to 50%
1470 */
1471 if (width == maxw && height == maxh)
1472 width /= 2;
1473 } else {
1474 /*
1475 * width must even because of the YUYV format
1476 * height must be even because of interlacing
1477 */
1478 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1479 1, 0);
1480 }
1481 /* Avoid division by zero at size_to_scale */
1482 if (width < 1)
1483 width = 1;
1484 if (height < 1)
1485 height = 1;
1486
1487 size_to_scale(dev, width, height, &hscale, &vscale);
1488 scale_to_size(dev, hscale, vscale, &width, &height);
1489
1490 f->fmt.pix.width = width;
1491 f->fmt.pix.height = height;
1492 f->fmt.pix.pixelformat = fmt->fourcc;
1493 f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
1494 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1495 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1496 if (v4l2->progressive)
1497 f->fmt.pix.field = V4L2_FIELD_NONE;
1498 else
1499 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1500 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1501
1502 return 0;
1503 }
1504
1505 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1506 unsigned int width, unsigned int height)
1507 {
1508 struct em28xx_fmt *fmt;
1509 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1510
1511 fmt = format_by_fourcc(fourcc);
1512 if (!fmt)
1513 return -EINVAL;
1514
1515 v4l2->format = fmt;
1516 v4l2->width = width;
1517 v4l2->height = height;
1518
1519 /* set new image size */
1520 size_to_scale(dev, v4l2->width, v4l2->height,
1521 &v4l2->hscale, &v4l2->vscale);
1522
1523 em28xx_resolution_set(dev);
1524
1525 return 0;
1526 }
1527
1528 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1529 struct v4l2_format *f)
1530 {
1531 struct em28xx *dev = video_drvdata(file);
1532 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1533
1534 if (vb2_is_busy(&v4l2->vb_vidq))
1535 return -EBUSY;
1536
1537 vidioc_try_fmt_vid_cap(file, priv, f);
1538
1539 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1540 f->fmt.pix.width, f->fmt.pix.height);
1541 }
1542
1543 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1544 {
1545 struct em28xx *dev = video_drvdata(file);
1546
1547 *norm = dev->v4l2->norm;
1548
1549 return 0;
1550 }
1551
1552 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
1553 {
1554 struct em28xx *dev = video_drvdata(file);
1555
1556 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm);
1557
1558 return 0;
1559 }
1560
1561 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
1562 {
1563 struct em28xx *dev = video_drvdata(file);
1564 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1565 struct v4l2_format f;
1566
1567 if (norm == v4l2->norm)
1568 return 0;
1569
1570 if (v4l2->streaming_users > 0)
1571 return -EBUSY;
1572
1573 v4l2->norm = norm;
1574
1575 /* Adjusts width/height, if needed */
1576 f.fmt.pix.width = 720;
1577 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576;
1578 vidioc_try_fmt_vid_cap(file, priv, &f);
1579
1580 /* set new image size */
1581 v4l2->width = f.fmt.pix.width;
1582 v4l2->height = f.fmt.pix.height;
1583 size_to_scale(dev, v4l2->width, v4l2->height,
1584 &v4l2->hscale, &v4l2->vscale);
1585
1586 em28xx_resolution_set(dev);
1587 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
1588
1589 return 0;
1590 }
1591
1592 static int vidioc_g_parm(struct file *file, void *priv,
1593 struct v4l2_streamparm *p)
1594 {
1595 struct v4l2_subdev_frame_interval ival = { 0 };
1596 struct em28xx *dev = video_drvdata(file);
1597 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1598 int rc = 0;
1599
1600 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1601 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1602 return -EINVAL;
1603
1604 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1605 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1606 if (dev->is_webcam) {
1607 rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0,
1608 pad, get_frame_interval, NULL,
1609 &ival);
1610 if (!rc)
1611 p->parm.capture.timeperframe = ival.interval;
1612 } else {
1613 v4l2_video_std_frame_period(v4l2->norm,
1614 &p->parm.capture.timeperframe);
1615 }
1616
1617 return rc;
1618 }
1619
1620 static int vidioc_s_parm(struct file *file, void *priv,
1621 struct v4l2_streamparm *p)
1622 {
1623 struct em28xx *dev = video_drvdata(file);
1624 struct v4l2_subdev_frame_interval ival = {
1625 0,
1626 p->parm.capture.timeperframe
1627 };
1628 int rc = 0;
1629
1630 if (!dev->is_webcam)
1631 return -ENOTTY;
1632
1633 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1634 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1635 return -EINVAL;
1636
1637 memset(&p->parm, 0, sizeof(p->parm));
1638 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1639 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1640 rc = v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 0,
1641 pad, set_frame_interval, NULL,
1642 &ival);
1643 if (!rc)
1644 p->parm.capture.timeperframe = ival.interval;
1645 return rc;
1646 }
1647
1648 static int vidioc_enum_input(struct file *file, void *priv,
1649 struct v4l2_input *i)
1650 {
1651 struct em28xx *dev = video_drvdata(file);
1652 unsigned int n;
1653 int j;
1654
1655 n = i->index;
1656 if (n >= MAX_EM28XX_INPUT)
1657 return -EINVAL;
1658 if (!INPUT(n)->type)
1659 return -EINVAL;
1660
1661 i->type = V4L2_INPUT_TYPE_CAMERA;
1662
1663 strscpy(i->name, iname[INPUT(n)->type], sizeof(i->name));
1664
1665 if (INPUT(n)->type == EM28XX_VMUX_TELEVISION)
1666 i->type = V4L2_INPUT_TYPE_TUNER;
1667
1668 i->std = dev->v4l2->vdev.tvnorms;
1669 /* webcams do not have the STD API */
1670 if (dev->is_webcam)
1671 i->capabilities = 0;
1672
1673 /* Dynamically generates an audioset bitmask */
1674 i->audioset = 0;
1675 for (j = 0; j < MAX_EM28XX_INPUT; j++)
1676 if (dev->amux_map[j] != EM28XX_AMUX_UNUSED)
1677 i->audioset |= 1 << j;
1678
1679 return 0;
1680 }
1681
1682 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1683 {
1684 struct em28xx *dev = video_drvdata(file);
1685
1686 *i = dev->ctl_input;
1687
1688 return 0;
1689 }
1690
1691 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1692 {
1693 struct em28xx *dev = video_drvdata(file);
1694
1695 if (i >= MAX_EM28XX_INPUT)
1696 return -EINVAL;
1697 if (!INPUT(i)->type)
1698 return -EINVAL;
1699
1700 video_mux(dev, i);
1701 return 0;
1702 }
1703
1704 static int em28xx_fill_audio_input(struct em28xx *dev,
1705 const char *s,
1706 struct v4l2_audio *a,
1707 unsigned int index)
1708 {
1709 unsigned int idx = dev->amux_map[index];
1710
1711 /*
1712 * With msp3400, almost all mappings use the default (amux = 0).
1713 * The only one may use a different value is WinTV USB2, where it
1714 * can also be SCART1 input.
1715 * As it is very doubtful that we would see new boards with msp3400,
1716 * let's just reuse the existing switch.
1717 */
1718 if (dev->has_msp34xx && idx != EM28XX_AMUX_UNUSED)
1719 idx = EM28XX_AMUX_LINE_IN;
1720
1721 switch (idx) {
1722 case EM28XX_AMUX_VIDEO:
1723 strscpy(a->name, "Television", sizeof(a->name));
1724 break;
1725 case EM28XX_AMUX_LINE_IN:
1726 strscpy(a->name, "Line In", sizeof(a->name));
1727 break;
1728 case EM28XX_AMUX_VIDEO2:
1729 strscpy(a->name, "Television alt", sizeof(a->name));
1730 break;
1731 case EM28XX_AMUX_PHONE:
1732 strscpy(a->name, "Phone", sizeof(a->name));
1733 break;
1734 case EM28XX_AMUX_MIC:
1735 strscpy(a->name, "Mic", sizeof(a->name));
1736 break;
1737 case EM28XX_AMUX_CD:
1738 strscpy(a->name, "CD", sizeof(a->name));
1739 break;
1740 case EM28XX_AMUX_AUX:
1741 strscpy(a->name, "Aux", sizeof(a->name));
1742 break;
1743 case EM28XX_AMUX_PCM_OUT:
1744 strscpy(a->name, "PCM", sizeof(a->name));
1745 break;
1746 case EM28XX_AMUX_UNUSED:
1747 default:
1748 return -EINVAL;
1749 }
1750 a->index = index;
1751 a->capability = V4L2_AUDCAP_STEREO;
1752
1753 em28xx_videodbg("%s: audio input index %d is '%s'\n",
1754 s, a->index, a->name);
1755
1756 return 0;
1757 }
1758
1759 static int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *a)
1760 {
1761 struct em28xx *dev = video_drvdata(file);
1762
1763 if (a->index >= MAX_EM28XX_INPUT)
1764 return -EINVAL;
1765
1766 return em28xx_fill_audio_input(dev, __func__, a, a->index);
1767 }
1768
1769 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1770 {
1771 struct em28xx *dev = video_drvdata(file);
1772 int i;
1773
1774 for (i = 0; i < MAX_EM28XX_INPUT; i++)
1775 if (dev->ctl_ainput == dev->amux_map[i])
1776 return em28xx_fill_audio_input(dev, __func__, a, i);
1777
1778 /* Should never happen! */
1779 return -EINVAL;
1780 }
1781
1782 static int vidioc_s_audio(struct file *file, void *priv,
1783 const struct v4l2_audio *a)
1784 {
1785 struct em28xx *dev = video_drvdata(file);
1786 int idx, i;
1787
1788 if (a->index >= MAX_EM28XX_INPUT)
1789 return -EINVAL;
1790
1791 idx = dev->amux_map[a->index];
1792
1793 if (idx == EM28XX_AMUX_UNUSED)
1794 return -EINVAL;
1795
1796 dev->ctl_ainput = idx;
1797
1798 /*
1799 * FIXME: This is wrong, as different inputs at em28xx_cards
1800 * may have different audio outputs. So, the right thing
1801 * to do is to implement VIDIOC_G_AUDOUT/VIDIOC_S_AUDOUT.
1802 * With the current board definitions, this would work fine,
1803 * as, currently, all boards fit.
1804 */
1805 for (i = 0; i < MAX_EM28XX_INPUT; i++)
1806 if (idx == dev->amux_map[i])
1807 break;
1808 if (i == MAX_EM28XX_INPUT)
1809 return -EINVAL;
1810
1811 dev->ctl_aoutput = INPUT(i)->aout;
1812
1813 if (!dev->ctl_aoutput)
1814 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1815
1816 em28xx_videodbg("%s: set audio input to %d\n", __func__,
1817 dev->ctl_ainput);
1818
1819 return 0;
1820 }
1821
1822 static int vidioc_g_tuner(struct file *file, void *priv,
1823 struct v4l2_tuner *t)
1824 {
1825 struct em28xx *dev = video_drvdata(file);
1826
1827 if (t->index != 0)
1828 return -EINVAL;
1829
1830 strscpy(t->name, "Tuner", sizeof(t->name));
1831
1832 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
1833 return 0;
1834 }
1835
1836 static int vidioc_s_tuner(struct file *file, void *priv,
1837 const struct v4l2_tuner *t)
1838 {
1839 struct em28xx *dev = video_drvdata(file);
1840
1841 if (t->index != 0)
1842 return -EINVAL;
1843
1844 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
1845 return 0;
1846 }
1847
1848 static int vidioc_g_frequency(struct file *file, void *priv,
1849 struct v4l2_frequency *f)
1850 {
1851 struct em28xx *dev = video_drvdata(file);
1852 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1853
1854 if (f->tuner != 0)
1855 return -EINVAL;
1856
1857 f->frequency = v4l2->frequency;
1858 return 0;
1859 }
1860
1861 static int vidioc_s_frequency(struct file *file, void *priv,
1862 const struct v4l2_frequency *f)
1863 {
1864 struct v4l2_frequency new_freq = *f;
1865 struct em28xx *dev = video_drvdata(file);
1866 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1867
1868 if (f->tuner != 0)
1869 return -EINVAL;
1870
1871 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f);
1872 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq);
1873 v4l2->frequency = new_freq.frequency;
1874
1875 return 0;
1876 }
1877
1878 #ifdef CONFIG_VIDEO_ADV_DEBUG
1879 static int vidioc_g_chip_info(struct file *file, void *priv,
1880 struct v4l2_dbg_chip_info *chip)
1881 {
1882 struct em28xx *dev = video_drvdata(file);
1883
1884 if (chip->match.addr > 1)
1885 return -EINVAL;
1886 if (chip->match.addr == 1)
1887 strscpy(chip->name, "ac97", sizeof(chip->name));
1888 else
1889 strscpy(chip->name,
1890 dev->v4l2->v4l2_dev.name, sizeof(chip->name));
1891 return 0;
1892 }
1893
1894 static int em28xx_reg_len(int reg)
1895 {
1896 switch (reg) {
1897 case EM28XX_R40_AC97LSB:
1898 case EM28XX_R30_HSCALELOW:
1899 case EM28XX_R32_VSCALELOW:
1900 return 2;
1901 default:
1902 return 1;
1903 }
1904 }
1905
1906 static int vidioc_g_register(struct file *file, void *priv,
1907 struct v4l2_dbg_register *reg)
1908 {
1909 struct em28xx *dev = video_drvdata(file);
1910 int ret;
1911
1912 if (reg->match.addr > 1)
1913 return -EINVAL;
1914 if (reg->match.addr) {
1915 ret = em28xx_read_ac97(dev, reg->reg);
1916 if (ret < 0)
1917 return ret;
1918
1919 reg->val = ret;
1920 reg->size = 1;
1921 return 0;
1922 }
1923
1924 /* Match host */
1925 reg->size = em28xx_reg_len(reg->reg);
1926 if (reg->size == 1) {
1927 ret = em28xx_read_reg(dev, reg->reg);
1928
1929 if (ret < 0)
1930 return ret;
1931
1932 reg->val = ret;
1933 } else {
1934 __le16 val = 0;
1935
1936 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1937 reg->reg, (char *)&val, 2);
1938 if (ret < 0)
1939 return ret;
1940
1941 reg->val = le16_to_cpu(val);
1942 }
1943
1944 return 0;
1945 }
1946
1947 static int vidioc_s_register(struct file *file, void *priv,
1948 const struct v4l2_dbg_register *reg)
1949 {
1950 struct em28xx *dev = video_drvdata(file);
1951 __le16 buf;
1952
1953 if (reg->match.addr > 1)
1954 return -EINVAL;
1955 if (reg->match.addr)
1956 return em28xx_write_ac97(dev, reg->reg, reg->val);
1957
1958 /* Match host */
1959 buf = cpu_to_le16(reg->val);
1960
1961 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1962 em28xx_reg_len(reg->reg));
1963 }
1964 #endif
1965
1966 static int vidioc_querycap(struct file *file, void *priv,
1967 struct v4l2_capability *cap)
1968 {
1969 struct em28xx *dev = video_drvdata(file);
1970 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1971 struct usb_device *udev = interface_to_usbdev(dev->intf);
1972
1973 strscpy(cap->driver, "em28xx", sizeof(cap->driver));
1974 strscpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1975 usb_make_path(udev, cap->bus_info, sizeof(cap->bus_info));
1976
1977 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_READWRITE |
1978 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1979 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
1980 cap->capabilities |= V4L2_CAP_AUDIO;
1981 if (dev->tuner_type != TUNER_ABSENT)
1982 cap->capabilities |= V4L2_CAP_TUNER;
1983 if (video_is_registered(&v4l2->vbi_dev))
1984 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1985 if (video_is_registered(&v4l2->radio_dev))
1986 cap->capabilities |= V4L2_CAP_RADIO;
1987 return 0;
1988 }
1989
1990 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1991 struct v4l2_fmtdesc *f)
1992 {
1993 if (unlikely(f->index >= ARRAY_SIZE(format)))
1994 return -EINVAL;
1995
1996 f->pixelformat = format[f->index].fourcc;
1997
1998 return 0;
1999 }
2000
2001 static int vidioc_enum_framesizes(struct file *file, void *priv,
2002 struct v4l2_frmsizeenum *fsize)
2003 {
2004 struct em28xx *dev = video_drvdata(file);
2005 struct em28xx_fmt *fmt;
2006 unsigned int maxw = norm_maxw(dev);
2007 unsigned int maxh = norm_maxh(dev);
2008
2009 fmt = format_by_fourcc(fsize->pixel_format);
2010 if (!fmt) {
2011 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
2012 fsize->pixel_format);
2013 return -EINVAL;
2014 }
2015
2016 if (dev->board.is_em2800) {
2017 if (fsize->index > 1)
2018 return -EINVAL;
2019 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
2020 fsize->discrete.width = maxw / (1 + fsize->index);
2021 fsize->discrete.height = maxh / (1 + fsize->index);
2022 return 0;
2023 }
2024
2025 if (fsize->index != 0)
2026 return -EINVAL;
2027
2028 /* Report a continuous range */
2029 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
2030 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
2031 &fsize->stepwise.min_width, &fsize->stepwise.min_height);
2032 if (fsize->stepwise.min_width < 48)
2033 fsize->stepwise.min_width = 48;
2034 if (fsize->stepwise.min_height < 38)
2035 fsize->stepwise.min_height = 38;
2036 fsize->stepwise.max_width = maxw;
2037 fsize->stepwise.max_height = maxh;
2038 fsize->stepwise.step_width = 1;
2039 fsize->stepwise.step_height = 1;
2040 return 0;
2041 }
2042
2043 /* RAW VBI ioctls */
2044
2045 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
2046 struct v4l2_format *format)
2047 {
2048 struct em28xx *dev = video_drvdata(file);
2049 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2050
2051 format->fmt.vbi.samples_per_line = v4l2->vbi_width;
2052 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
2053 format->fmt.vbi.offset = 0;
2054 format->fmt.vbi.flags = 0;
2055 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
2056 format->fmt.vbi.count[0] = v4l2->vbi_height;
2057 format->fmt.vbi.count[1] = v4l2->vbi_height;
2058 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
2059
2060 /* Varies by video standard (NTSC, PAL, etc.) */
2061 if (v4l2->norm & V4L2_STD_525_60) {
2062 /* NTSC */
2063 format->fmt.vbi.start[0] = 10;
2064 format->fmt.vbi.start[1] = 273;
2065 } else if (v4l2->norm & V4L2_STD_625_50) {
2066 /* PAL */
2067 format->fmt.vbi.start[0] = 6;
2068 format->fmt.vbi.start[1] = 318;
2069 }
2070
2071 return 0;
2072 }
2073
2074 /*
2075 * RADIO ESPECIFIC IOCTLS
2076 */
2077
2078 static int radio_g_tuner(struct file *file, void *priv,
2079 struct v4l2_tuner *t)
2080 {
2081 struct em28xx *dev = video_drvdata(file);
2082
2083 if (unlikely(t->index > 0))
2084 return -EINVAL;
2085
2086 strscpy(t->name, "Radio", sizeof(t->name));
2087
2088 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
2089
2090 return 0;
2091 }
2092
2093 static int radio_s_tuner(struct file *file, void *priv,
2094 const struct v4l2_tuner *t)
2095 {
2096 struct em28xx *dev = video_drvdata(file);
2097
2098 if (t->index != 0)
2099 return -EINVAL;
2100
2101 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
2102
2103 return 0;
2104 }
2105
2106 /*
2107 * em28xx_free_v4l2() - Free struct em28xx_v4l2
2108 *
2109 * @ref: struct kref for struct em28xx_v4l2
2110 *
2111 * Called when all users of struct em28xx_v4l2 are gone
2112 */
2113 static void em28xx_free_v4l2(struct kref *ref)
2114 {
2115 struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref);
2116
2117 v4l2->dev->v4l2 = NULL;
2118 kfree(v4l2);
2119 }
2120
2121 /*
2122 * em28xx_v4l2_open()
2123 * inits the device and starts isoc transfer
2124 */
2125 static int em28xx_v4l2_open(struct file *filp)
2126 {
2127 struct video_device *vdev = video_devdata(filp);
2128 struct em28xx *dev = video_drvdata(filp);
2129 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2130 enum v4l2_buf_type fh_type = 0;
2131 int ret;
2132
2133 switch (vdev->vfl_type) {
2134 case VFL_TYPE_VIDEO:
2135 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2136 break;
2137 case VFL_TYPE_VBI:
2138 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2139 break;
2140 case VFL_TYPE_RADIO:
2141 break;
2142 default:
2143 return -EINVAL;
2144 }
2145
2146 em28xx_videodbg("open dev=%s type=%s users=%d\n",
2147 video_device_node_name(vdev), v4l2_type_names[fh_type],
2148 v4l2->users);
2149
2150 if (mutex_lock_interruptible(&dev->lock))
2151 return -ERESTARTSYS;
2152
2153 ret = v4l2_fh_open(filp);
2154 if (ret) {
2155 dev_err(&dev->intf->dev,
2156 "%s: v4l2_fh_open() returned error %d\n",
2157 __func__, ret);
2158 mutex_unlock(&dev->lock);
2159 return ret;
2160 }
2161
2162 if (v4l2->users == 0) {
2163 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2164
2165 if (vdev->vfl_type != VFL_TYPE_RADIO)
2166 em28xx_resolution_set(dev);
2167
2168 /*
2169 * Needed, since GPIO might have disabled power
2170 * of some i2c devices
2171 */
2172 em28xx_wake_i2c(dev);
2173 }
2174
2175 if (vdev->vfl_type == VFL_TYPE_RADIO) {
2176 em28xx_videodbg("video_open: setting radio device\n");
2177 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio);
2178 }
2179
2180 kref_get(&dev->ref);
2181 kref_get(&v4l2->ref);
2182 v4l2->users++;
2183
2184 mutex_unlock(&dev->lock);
2185
2186 return 0;
2187 }
2188
2189 /*
2190 * em28xx_v4l2_fini()
2191 * unregisters the v4l2,i2c and usb devices
2192 * called when the device gets disconnected or at module unload
2193 */
2194 static int em28xx_v4l2_fini(struct em28xx *dev)
2195 {
2196 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2197
2198 if (dev->is_audio_only) {
2199 /* Shouldn't initialize IR for this interface */
2200 return 0;
2201 }
2202
2203 if (!dev->has_video) {
2204 /* This device does not support the v4l2 extension */
2205 return 0;
2206 }
2207
2208 if (!v4l2)
2209 return 0;
2210
2211 dev_info(&dev->intf->dev, "Closing video extension\n");
2212
2213 mutex_lock(&dev->lock);
2214
2215 v4l2_device_disconnect(&v4l2->v4l2_dev);
2216
2217 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
2218
2219 em28xx_v4l2_media_release(dev);
2220
2221 if (video_is_registered(&v4l2->radio_dev)) {
2222 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2223 video_device_node_name(&v4l2->radio_dev));
2224 video_unregister_device(&v4l2->radio_dev);
2225 }
2226 if (video_is_registered(&v4l2->vbi_dev)) {
2227 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2228 video_device_node_name(&v4l2->vbi_dev));
2229 video_unregister_device(&v4l2->vbi_dev);
2230 }
2231 if (video_is_registered(&v4l2->vdev)) {
2232 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2233 video_device_node_name(&v4l2->vdev));
2234 video_unregister_device(&v4l2->vdev);
2235 }
2236
2237 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2238 v4l2_device_unregister(&v4l2->v4l2_dev);
2239
2240 kref_put(&v4l2->ref, em28xx_free_v4l2);
2241
2242 mutex_unlock(&dev->lock);
2243
2244 kref_put(&dev->ref, em28xx_free_device);
2245
2246 return 0;
2247 }
2248
2249 static int em28xx_v4l2_suspend(struct em28xx *dev)
2250 {
2251 if (dev->is_audio_only)
2252 return 0;
2253
2254 if (!dev->has_video)
2255 return 0;
2256
2257 dev_info(&dev->intf->dev, "Suspending video extension\n");
2258 em28xx_stop_urbs(dev);
2259 return 0;
2260 }
2261
2262 static int em28xx_v4l2_resume(struct em28xx *dev)
2263 {
2264 if (dev->is_audio_only)
2265 return 0;
2266
2267 if (!dev->has_video)
2268 return 0;
2269
2270 dev_info(&dev->intf->dev, "Resuming video extension\n");
2271 /* what do we do here */
2272 return 0;
2273 }
2274
2275 /*
2276 * em28xx_v4l2_close()
2277 * stops streaming and deallocates all resources allocated by the v4l2
2278 * calls and ioctls
2279 */
2280 static int em28xx_v4l2_close(struct file *filp)
2281 {
2282 struct em28xx *dev = video_drvdata(filp);
2283 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2284 struct usb_device *udev = interface_to_usbdev(dev->intf);
2285 int err;
2286
2287 em28xx_videodbg("users=%d\n", v4l2->users);
2288
2289 vb2_fop_release(filp);
2290 mutex_lock(&dev->lock);
2291
2292 if (v4l2->users == 1) {
2293 /* No sense to try to write to the device */
2294 if (dev->disconnected)
2295 goto exit;
2296
2297 /* Save some power by putting tuner to sleep */
2298 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2299
2300 /* do this before setting alternate! */
2301 em28xx_set_mode(dev, EM28XX_SUSPEND);
2302
2303 /* set alternate 0 */
2304 dev->alt = 0;
2305 em28xx_videodbg("setting alternate 0\n");
2306 err = usb_set_interface(udev, 0, 0);
2307 if (err < 0) {
2308 dev_err(&dev->intf->dev,
2309 "cannot change alternate number to 0 (error=%i)\n",
2310 err);
2311 }
2312 }
2313
2314 exit:
2315 v4l2->users--;
2316 kref_put(&v4l2->ref, em28xx_free_v4l2);
2317 mutex_unlock(&dev->lock);
2318 kref_put(&dev->ref, em28xx_free_device);
2319
2320 return 0;
2321 }
2322
2323 static const struct v4l2_file_operations em28xx_v4l_fops = {
2324 .owner = THIS_MODULE,
2325 .open = em28xx_v4l2_open,
2326 .release = em28xx_v4l2_close,
2327 .read = vb2_fop_read,
2328 .poll = vb2_fop_poll,
2329 .mmap = vb2_fop_mmap,
2330 .unlocked_ioctl = video_ioctl2,
2331 };
2332
2333 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2334 .vidioc_querycap = vidioc_querycap,
2335 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2336 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2337 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2338 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
2339 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2340 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2341 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2342 .vidioc_enum_framesizes = vidioc_enum_framesizes,
2343 .vidioc_enumaudio = vidioc_enumaudio,
2344 .vidioc_g_audio = vidioc_g_audio,
2345 .vidioc_s_audio = vidioc_s_audio,
2346
2347 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2348 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2349 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
2350 .vidioc_querybuf = vb2_ioctl_querybuf,
2351 .vidioc_qbuf = vb2_ioctl_qbuf,
2352 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2353
2354 .vidioc_g_std = vidioc_g_std,
2355 .vidioc_querystd = vidioc_querystd,
2356 .vidioc_s_std = vidioc_s_std,
2357 .vidioc_g_parm = vidioc_g_parm,
2358 .vidioc_s_parm = vidioc_s_parm,
2359 .vidioc_enum_input = vidioc_enum_input,
2360 .vidioc_g_input = vidioc_g_input,
2361 .vidioc_s_input = vidioc_s_input,
2362 .vidioc_streamon = vb2_ioctl_streamon,
2363 .vidioc_streamoff = vb2_ioctl_streamoff,
2364 .vidioc_g_tuner = vidioc_g_tuner,
2365 .vidioc_s_tuner = vidioc_s_tuner,
2366 .vidioc_g_frequency = vidioc_g_frequency,
2367 .vidioc_s_frequency = vidioc_s_frequency,
2368 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2369 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2370 #ifdef CONFIG_VIDEO_ADV_DEBUG
2371 .vidioc_g_chip_info = vidioc_g_chip_info,
2372 .vidioc_g_register = vidioc_g_register,
2373 .vidioc_s_register = vidioc_s_register,
2374 #endif
2375 };
2376
2377 static const struct video_device em28xx_video_template = {
2378 .fops = &em28xx_v4l_fops,
2379 .ioctl_ops = &video_ioctl_ops,
2380 .release = video_device_release_empty,
2381 .tvnorms = V4L2_STD_ALL,
2382 };
2383
2384 static const struct v4l2_file_operations radio_fops = {
2385 .owner = THIS_MODULE,
2386 .open = em28xx_v4l2_open,
2387 .release = em28xx_v4l2_close,
2388 .unlocked_ioctl = video_ioctl2,
2389 };
2390
2391 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2392 .vidioc_querycap = vidioc_querycap,
2393 .vidioc_g_tuner = radio_g_tuner,
2394 .vidioc_s_tuner = radio_s_tuner,
2395 .vidioc_g_frequency = vidioc_g_frequency,
2396 .vidioc_s_frequency = vidioc_s_frequency,
2397 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2398 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2399 #ifdef CONFIG_VIDEO_ADV_DEBUG
2400 .vidioc_g_chip_info = vidioc_g_chip_info,
2401 .vidioc_g_register = vidioc_g_register,
2402 .vidioc_s_register = vidioc_s_register,
2403 #endif
2404 };
2405
2406 static struct video_device em28xx_radio_template = {
2407 .fops = &radio_fops,
2408 .ioctl_ops = &radio_ioctl_ops,
2409 .release = video_device_release_empty,
2410 };
2411
2412 /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */
2413 static unsigned short saa711x_addrs[] = {
2414 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */
2415 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */
2416 I2C_CLIENT_END };
2417
2418 static unsigned short tvp5150_addrs[] = {
2419 0xb8 >> 1,
2420 0xba >> 1,
2421 I2C_CLIENT_END
2422 };
2423
2424 static unsigned short msp3400_addrs[] = {
2425 0x80 >> 1,
2426 0x88 >> 1,
2427 I2C_CLIENT_END
2428 };
2429
2430 /******************************** usb interface ******************************/
2431
2432 static void em28xx_vdev_init(struct em28xx *dev,
2433 struct video_device *vfd,
2434 const struct video_device *template,
2435 const char *type_name)
2436 {
2437 *vfd = *template;
2438 vfd->v4l2_dev = &dev->v4l2->v4l2_dev;
2439 vfd->lock = &dev->lock;
2440 if (dev->is_webcam)
2441 vfd->tvnorms = 0;
2442
2443 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2444 dev_name(&dev->intf->dev), type_name);
2445
2446 video_set_drvdata(vfd, dev);
2447 }
2448
2449 static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr)
2450 {
2451 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2452 struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev;
2453 struct tuner_setup tun_setup;
2454 struct v4l2_frequency f;
2455
2456 memset(&tun_setup, 0, sizeof(tun_setup));
2457
2458 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
2459 tun_setup.tuner_callback = em28xx_tuner_callback;
2460
2461 if (dev->board.radio.type) {
2462 tun_setup.type = dev->board.radio.type;
2463 tun_setup.addr = dev->board.radio_addr;
2464
2465 v4l2_device_call_all(v4l2_dev,
2466 0, tuner, s_type_addr, &tun_setup);
2467 }
2468
2469 if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type) {
2470 tun_setup.type = dev->tuner_type;
2471 tun_setup.addr = tuner_addr;
2472
2473 v4l2_device_call_all(v4l2_dev,
2474 0, tuner, s_type_addr, &tun_setup);
2475 }
2476
2477 if (dev->board.tda9887_conf) {
2478 struct v4l2_priv_tun_config tda9887_cfg;
2479
2480 tda9887_cfg.tuner = TUNER_TDA9887;
2481 tda9887_cfg.priv = &dev->board.tda9887_conf;
2482
2483 v4l2_device_call_all(v4l2_dev,
2484 0, tuner, s_config, &tda9887_cfg);
2485 }
2486
2487 if (dev->tuner_type == TUNER_XC2028) {
2488 struct v4l2_priv_tun_config xc2028_cfg;
2489 struct xc2028_ctrl ctl;
2490
2491 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg));
2492 memset(&ctl, 0, sizeof(ctl));
2493
2494 em28xx_setup_xc3028(dev, &ctl);
2495
2496 xc2028_cfg.tuner = TUNER_XC2028;
2497 xc2028_cfg.priv = &ctl;
2498
2499 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg);
2500 }
2501
2502 /* configure tuner */
2503 f.tuner = 0;
2504 f.type = V4L2_TUNER_ANALOG_TV;
2505 f.frequency = 9076; /* just a magic number */
2506 v4l2->frequency = f.frequency;
2507 v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f);
2508 }
2509
2510 static int em28xx_v4l2_init(struct em28xx *dev)
2511 {
2512 u8 val;
2513 int ret;
2514 unsigned int maxw;
2515 struct v4l2_ctrl_handler *hdl;
2516 struct em28xx_v4l2 *v4l2;
2517
2518 if (dev->is_audio_only) {
2519 /* Shouldn't initialize IR for this interface */
2520 return 0;
2521 }
2522
2523 if (!dev->has_video) {
2524 /* This device does not support the v4l2 extension */
2525 return 0;
2526 }
2527
2528 dev_info(&dev->intf->dev, "Registering V4L2 extension\n");
2529
2530 mutex_lock(&dev->lock);
2531
2532 v4l2 = kzalloc(sizeof(*v4l2), GFP_KERNEL);
2533 if (!v4l2) {
2534 mutex_unlock(&dev->lock);
2535 return -ENOMEM;
2536 }
2537 kref_init(&v4l2->ref);
2538 v4l2->dev = dev;
2539 dev->v4l2 = v4l2;
2540
2541 #ifdef CONFIG_MEDIA_CONTROLLER
2542 v4l2->v4l2_dev.mdev = dev->media_dev;
2543 #endif
2544 ret = v4l2_device_register(&dev->intf->dev, &v4l2->v4l2_dev);
2545 if (ret < 0) {
2546 dev_err(&dev->intf->dev,
2547 "Call to v4l2_device_register() failed!\n");
2548 goto err;
2549 }
2550
2551 hdl = &v4l2->ctrl_handler;
2552 v4l2_ctrl_handler_init(hdl, 8);
2553 v4l2->v4l2_dev.ctrl_handler = hdl;
2554
2555 if (dev->is_webcam)
2556 v4l2->progressive = true;
2557
2558 /*
2559 * Default format, used for tvp5150 or saa711x output formats
2560 */
2561 v4l2->vinmode = EM28XX_VINMODE_YUV422_CbYCrY;
2562 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED |
2563 EM28XX_VINCTRL_CCIR656_ENABLE;
2564
2565 /* request some modules */
2566
2567 if (dev->has_msp34xx)
2568 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2569 &dev->i2c_adap[dev->def_i2c_bus],
2570 "msp3400", 0, msp3400_addrs);
2571
2572 if (dev->board.decoder == EM28XX_SAA711X)
2573 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2574 &dev->i2c_adap[dev->def_i2c_bus],
2575 "saa7115_auto", 0, saa711x_addrs);
2576
2577 if (dev->board.decoder == EM28XX_TVP5150)
2578 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2579 &dev->i2c_adap[dev->def_i2c_bus],
2580 "tvp5150", 0, tvp5150_addrs);
2581
2582 if (dev->board.adecoder == EM28XX_TVAUDIO)
2583 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2584 &dev->i2c_adap[dev->def_i2c_bus],
2585 "tvaudio", dev->board.tvaudio_addr, NULL);
2586
2587 /* Initialize tuner and camera */
2588
2589 if (dev->board.tuner_type != TUNER_ABSENT) {
2590 unsigned short tuner_addr = dev->board.tuner_addr;
2591 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT);
2592
2593 if (dev->board.radio.type)
2594 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2595 &dev->i2c_adap[dev->def_i2c_bus],
2596 "tuner", dev->board.radio_addr,
2597 NULL);
2598
2599 if (has_demod)
2600 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2601 &dev->i2c_adap[dev->def_i2c_bus],
2602 "tuner", 0,
2603 v4l2_i2c_tuner_addrs(ADDRS_DEMOD));
2604 if (tuner_addr == 0) {
2605 enum v4l2_i2c_tuner_type type =
2606 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV;
2607 struct v4l2_subdev *sd;
2608
2609 sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2610 &dev->i2c_adap[dev->def_i2c_bus],
2611 "tuner", 0,
2612 v4l2_i2c_tuner_addrs(type));
2613
2614 if (sd)
2615 tuner_addr = v4l2_i2c_subdev_addr(sd);
2616 } else {
2617 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2618 &dev->i2c_adap[dev->def_i2c_bus],
2619 "tuner", tuner_addr, NULL);
2620 }
2621
2622 em28xx_tuner_setup(dev, tuner_addr);
2623 }
2624
2625 if (dev->em28xx_sensor != EM28XX_NOSENSOR)
2626 em28xx_init_camera(dev);
2627
2628 /* Configure audio */
2629 ret = em28xx_audio_setup(dev);
2630 if (ret < 0) {
2631 dev_err(&dev->intf->dev,
2632 "%s: Error while setting audio - error [%d]!\n",
2633 __func__, ret);
2634 goto unregister_dev;
2635 }
2636 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
2637 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2638 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
2639 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2640 V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f);
2641 } else {
2642 /* install the em28xx notify callback */
2643 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE),
2644 em28xx_ctrl_notify, dev);
2645 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME),
2646 em28xx_ctrl_notify, dev);
2647 }
2648
2649 /* wake i2c devices */
2650 em28xx_wake_i2c(dev);
2651
2652 /* init video dma queues */
2653 INIT_LIST_HEAD(&dev->vidq.active);
2654 INIT_LIST_HEAD(&dev->vbiq.active);
2655
2656 if (dev->has_msp34xx) {
2657 /* Send a reset to other chips via gpio */
2658 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7);
2659 if (ret < 0) {
2660 dev_err(&dev->intf->dev,
2661 "%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n",
2662 __func__, ret);
2663 goto unregister_dev;
2664 }
2665 usleep_range(10000, 11000);
2666
2667 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff);
2668 if (ret < 0) {
2669 dev_err(&dev->intf->dev,
2670 "%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n",
2671 __func__, ret);
2672 goto unregister_dev;
2673 }
2674 usleep_range(10000, 11000);
2675 }
2676
2677 /* set default norm */
2678 v4l2->norm = V4L2_STD_PAL;
2679 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
2680 v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT;
2681
2682 /* Analog specific initialization */
2683 v4l2->format = &format[0];
2684
2685 maxw = norm_maxw(dev);
2686 /*
2687 * MaxPacketSize for em2800 is too small to capture at full resolution
2688 * use half of maxw as the scaler can only scale to 50%
2689 */
2690 if (dev->board.is_em2800)
2691 maxw /= 2;
2692
2693 em28xx_set_video_format(dev, format[0].fourcc,
2694 maxw, norm_maxh(dev));
2695
2696 video_mux(dev, 0);
2697
2698 /* Audio defaults */
2699 dev->mute = 1;
2700 dev->volume = 0x1f;
2701
2702 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2703 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2704 em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2705 (EM28XX_XCLK_AUDIO_UNMUTE | val));
2706
2707 em28xx_set_outfmt(dev);
2708
2709 /* Add image controls */
2710
2711 /*
2712 * NOTE: at this point, the subdevices are already registered, so
2713 * bridge controls are only added/enabled when no subdevice provides
2714 * them
2715 */
2716 if (!v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST))
2717 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2718 V4L2_CID_CONTRAST,
2719 0, 0x1f, 1, CONTRAST_DEFAULT);
2720 if (!v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS))
2721 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2722 V4L2_CID_BRIGHTNESS,
2723 -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT);
2724 if (!v4l2_ctrl_find(hdl, V4L2_CID_SATURATION))
2725 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2726 V4L2_CID_SATURATION,
2727 0, 0x1f, 1, SATURATION_DEFAULT);
2728 if (!v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE))
2729 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2730 V4L2_CID_BLUE_BALANCE,
2731 -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT);
2732 if (!v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE))
2733 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2734 V4L2_CID_RED_BALANCE,
2735 -0x30, 0x30, 1, RED_BALANCE_DEFAULT);
2736 if (!v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS))
2737 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2738 V4L2_CID_SHARPNESS,
2739 0, 0x0f, 1, SHARPNESS_DEFAULT);
2740
2741 /* Reset image controls */
2742 em28xx_colorlevels_set_default(dev);
2743 v4l2_ctrl_handler_setup(hdl);
2744 ret = hdl->error;
2745 if (ret)
2746 goto unregister_dev;
2747
2748 /* allocate and fill video video_device struct */
2749 em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video");
2750 mutex_init(&v4l2->vb_queue_lock);
2751 mutex_init(&v4l2->vb_vbi_queue_lock);
2752 v4l2->vdev.queue = &v4l2->vb_vidq;
2753 v4l2->vdev.queue->lock = &v4l2->vb_queue_lock;
2754 v4l2->vdev.device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE |
2755 V4L2_CAP_STREAMING;
2756 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
2757 v4l2->vdev.device_caps |= V4L2_CAP_AUDIO;
2758 if (dev->tuner_type != TUNER_ABSENT)
2759 v4l2->vdev.device_caps |= V4L2_CAP_TUNER;
2760
2761
2762 /* disable inapplicable ioctls */
2763 if (dev->is_webcam) {
2764 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD);
2765 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD);
2766 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD);
2767 } else {
2768 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM);
2769 }
2770 if (dev->tuner_type == TUNER_ABSENT) {
2771 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER);
2772 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER);
2773 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY);
2774 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY);
2775 }
2776 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2777 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO);
2778 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO);
2779 }
2780
2781 /* register v4l2 video video_device */
2782 ret = video_register_device(&v4l2->vdev, VFL_TYPE_VIDEO,
2783 video_nr[dev->devno]);
2784 if (ret) {
2785 dev_err(&dev->intf->dev,
2786 "unable to register video device (error=%i).\n", ret);
2787 goto unregister_dev;
2788 }
2789
2790 /* Allocate and fill vbi video_device struct */
2791 if (em28xx_vbi_supported(dev) == 1) {
2792 em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template,
2793 "vbi");
2794
2795 v4l2->vbi_dev.queue = &v4l2->vb_vbiq;
2796 v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock;
2797 v4l2->vbi_dev.device_caps = V4L2_CAP_STREAMING |
2798 V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE;
2799 if (dev->tuner_type != TUNER_ABSENT)
2800 v4l2->vbi_dev.device_caps |= V4L2_CAP_TUNER;
2801
2802 /* disable inapplicable ioctls */
2803 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM);
2804 if (dev->tuner_type == TUNER_ABSENT) {
2805 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER);
2806 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER);
2807 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY);
2808 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY);
2809 }
2810 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2811 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO);
2812 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO);
2813 }
2814
2815 /* register v4l2 vbi video_device */
2816 ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI,
2817 vbi_nr[dev->devno]);
2818 if (ret < 0) {
2819 dev_err(&dev->intf->dev,
2820 "unable to register vbi device\n");
2821 goto unregister_dev;
2822 }
2823 }
2824
2825 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2826 em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template,
2827 "radio");
2828 v4l2->radio_dev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;
2829 ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO,
2830 radio_nr[dev->devno]);
2831 if (ret < 0) {
2832 dev_err(&dev->intf->dev,
2833 "can't register radio device\n");
2834 goto unregister_dev;
2835 }
2836 dev_info(&dev->intf->dev,
2837 "Registered radio device as %s\n",
2838 video_device_node_name(&v4l2->radio_dev));
2839 }
2840
2841 /* Init entities at the Media Controller */
2842 em28xx_v4l2_create_entities(dev);
2843
2844 #ifdef CONFIG_MEDIA_CONTROLLER
2845 ret = v4l2_mc_create_media_graph(dev->media_dev);
2846 if (ret) {
2847 dev_err(&dev->intf->dev,
2848 "failed to create media graph\n");
2849 em28xx_v4l2_media_release(dev);
2850 goto unregister_dev;
2851 }
2852 #endif
2853
2854 dev_info(&dev->intf->dev,
2855 "V4L2 video device registered as %s\n",
2856 video_device_node_name(&v4l2->vdev));
2857
2858 if (video_is_registered(&v4l2->vbi_dev))
2859 dev_info(&dev->intf->dev,
2860 "V4L2 VBI device registered as %s\n",
2861 video_device_node_name(&v4l2->vbi_dev));
2862
2863 /* Save some power by putting tuner to sleep */
2864 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2865
2866 /* initialize videobuf2 stuff */
2867 em28xx_vb2_setup(dev);
2868
2869 dev_info(&dev->intf->dev,
2870 "V4L2 extension successfully initialized\n");
2871
2872 kref_get(&dev->ref);
2873
2874 mutex_unlock(&dev->lock);
2875 return 0;
2876
2877 unregister_dev:
2878 if (video_is_registered(&v4l2->radio_dev)) {
2879 dev_info(&dev->intf->dev,
2880 "V4L2 device %s deregistered\n",
2881 video_device_node_name(&v4l2->radio_dev));
2882 video_unregister_device(&v4l2->radio_dev);
2883 }
2884 if (video_is_registered(&v4l2->vbi_dev)) {
2885 dev_info(&dev->intf->dev,
2886 "V4L2 device %s deregistered\n",
2887 video_device_node_name(&v4l2->vbi_dev));
2888 video_unregister_device(&v4l2->vbi_dev);
2889 }
2890 if (video_is_registered(&v4l2->vdev)) {
2891 dev_info(&dev->intf->dev,
2892 "V4L2 device %s deregistered\n",
2893 video_device_node_name(&v4l2->vdev));
2894 video_unregister_device(&v4l2->vdev);
2895 }
2896
2897 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2898 v4l2_device_unregister(&v4l2->v4l2_dev);
2899 err:
2900 dev->v4l2 = NULL;
2901 kref_put(&v4l2->ref, em28xx_free_v4l2);
2902 mutex_unlock(&dev->lock);
2903 return ret;
2904 }
2905
2906 static struct em28xx_ops v4l2_ops = {
2907 .id = EM28XX_V4L2,
2908 .name = "Em28xx v4l2 Extension",
2909 .init = em28xx_v4l2_init,
2910 .fini = em28xx_v4l2_fini,
2911 .suspend = em28xx_v4l2_suspend,
2912 .resume = em28xx_v4l2_resume,
2913 };
2914
2915 static int __init em28xx_video_register(void)
2916 {
2917 return em28xx_register_extension(&v4l2_ops);
2918 }
2919
2920 static void __exit em28xx_video_unregister(void)
2921 {
2922 em28xx_unregister_extension(&v4l2_ops);
2923 }
2924
2925 module_init(em28xx_video_register);
2926 module_exit(em28xx_video_unregister);
Kernel DRM miscellaneous fixes and cross-tree changes