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
40static unsigned int isoc_debug;
41module_param(isoc_debug, int, 0644);
42MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
43
44static unsigned int disable_vbi;
45module_param(disable_vbi, int, 0644);
46MODULE_PARM_DESC(disable_vbi, "disable vbi support");
47
48static int alt;
49module_param(alt, int, 0644);
50MODULE_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
64MODULE_AUTHOR(DRIVER_AUTHOR);
65MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface");
66MODULE_LICENSE("GPL v2");
67MODULE_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
77static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
78static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
79static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
80
81module_param_array(video_nr, int, NULL, 0444);
82module_param_array(vbi_nr, int, NULL, 0444);
83module_param_array(radio_nr, int, NULL, 0444);
84MODULE_PARM_DESC(video_nr, "video device numbers");
85MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
86MODULE_PARM_DESC(radio_nr, "radio device numbers");
87
88static unsigned int video_debug;
89module_param(video_debug, int, 0644);
90MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
91
92/* supported video standards */
93static 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 */
126static 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
139static 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
152static 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 */
175static 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
184static 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, val: 0x20);
194 em28xx_write_reg(dev, EM28XX_R15_RGAIN, val: 0x20);
195 em28xx_write_reg(dev, EM28XX_R16_GGAIN, val: 0x20);
196 em28xx_write_reg(dev, EM28XX_R17_BGAIN, val: 0x20);
197 em28xx_write_reg(dev, EM28XX_R18_ROFFSET, val: 0x00);
198 em28xx_write_reg(dev, EM28XX_R19_GOFFSET, val: 0x00);
199 return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, val: 0x00);
200}
201
202static 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, val: fmt);
221 if (ret < 0)
222 return ret;
223
224 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, val: 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, val: 0x00);
232 em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH,
233 val: v4l2->vbi_width / 4);
234 em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, val: v4l2->vbi_height);
235 if (v4l2->norm & V4L2_STD_525_60) {
236 /* NTSC */
237 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, val: 0x09);
238 } else if (v4l2->norm & V4L2_STD_625_50) {
239 /* PAL */
240 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, val: 0x07);
241 }
242 }
243
244 return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, val: vinctrl);
245}
246
247static 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, buf: &xmin, len: 1);
254 em28xx_write_regs(dev, EM28XX_R29_XMAX, buf: &xmax, len: 1);
255 em28xx_write_regs(dev, EM28XX_R2A_YMIN, buf: &ymin, len: 1);
256 return em28xx_write_regs(dev, EM28XX_R2B_YMAX, buf: &ymax, len: 1);
257}
258
259static 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, buf: &hstart, len: 1);
273 em28xx_write_regs(dev, EM28XX_R1D_VSTART, buf: &vstart, len: 1);
274 em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, buf: &cwidth, len: 1);
275 em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, buf: &cheight, len: 1);
276 em28xx_write_regs(dev, EM28XX_R1B_OFLOW, buf: &overflow, len: 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, reg: 0x34, val: width >> 4);
282 em28xx_write_reg(dev, reg: 0x35, val: height >> 4);
283 }
284}
285
286static 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, buf: (char *)buf, len: 2);
299
300 buf[0] = v;
301 buf[1] = v >> 8;
302 em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, buf: (char *)buf, len: 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, val: mode);
310}
311
312/* FIXME: this only function read values from dev */
313static 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, xmin: 1, xmax: (width - 4) >> 2, ymin: 1, ymax: (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, hstart: 0, vstart: 2, width, height);
341 else
342 em28xx_capture_area_set(dev, hstart: 0, vstart: 0, width, height);
343
344 return em28xx_scaler_set(dev, h: v4l2->hscale, v: v4l2->vscale);
345}
346
347/* Set USB alternate setting for analog video */
348static 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
392set_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(dev: udev, ifnum: dev->ifnum, alternate: 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 */
427static 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(vb: &buf->vb.vb2_buf, state: VB2_BUF_STATE_DONE);
440}
441
442/*
443 * Copy picture data from USB buffer to video buffer
444 */
445static 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 */
526static 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
545static 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 */
587static 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(head: &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(entry: &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 */
610static struct em28xx_buffer *
611finish_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 */
633static 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, buf: vbi_buf, dma_q: 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, buf: vbi_buf, usb_buf: data_pkt, len: 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, usb_buf: data_pkt, len: data_len);
713}
714
715/*
716 * Process data packet according to the em25xx/em276x/7x/8x frame data format
717 */
718static 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, dma_q: 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, usb_buf: data_pkt, len: 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, dma_q: 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) */
779static 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, packet: -1, status: 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, packet: i,
809 status: 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 data_pkt: usb_data_pkt, data_len: usb_data_len);
833 else
834 process_frame_data_em28xx(dev,
835 data_pkt: usb_data_pkt, data_len: usb_data_len);
836 }
837 return 1;
838}
839
840static 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 */
854static 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
870static 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
878static 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(entity: &dev->input_ent[i]);
887 }
888#endif
889}
890
891/*
892 * Media Controller helper functions
893 */
894
895static 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
954static 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
961static 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(entity: &v4l2->vdev.entity, num_pads: 1, pads: &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(entity: &v4l2->vbi_dev.entity, num_pads: 1,
977 pads: &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(entity: ent, num_pads: 1, pads: &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(mdev: dev->media_dev, entity: 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
1028static 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(q: 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
1047static int
1048buffer_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(q: 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, plane_no: 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, plane_no: 0, size);
1065
1066 return 0;
1067}
1068
1069int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
1070{
1071 struct em28xx *dev = vb2_get_drv_priv(q: 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, f_type: 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, mode: EM28XX_ANALOG_MODE,
1103 xfer_bulk: dev->analog_xfer_bulk,
1104 EM28XX_NUM_BUFS,
1105 max_pkt_size: dev->max_pkt_size,
1106 packet_multiplier: dev->packet_multiplier,
1107 urb_data_copy: 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
1137static void em28xx_stop_streaming(struct vb2_queue *vq)
1138{
1139 struct em28xx *dev = vb2_get_drv_priv(q: 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, f_type: 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, mode: EM28XX_ANALOG_MODE);
1154 }
1155
1156 spin_lock_irqsave(&dev->slock, flags);
1157 if (dev->usb_ctl.vid_buf) {
1158 vb2_buffer_done(vb: &dev->usb_ctl.vid_buf->vb.vb2_buf,
1159 state: VB2_BUF_STATE_ERROR);
1160 dev->usb_ctl.vid_buf = NULL;
1161 }
1162 while (!list_empty(head: &vidq->active)) {
1163 struct em28xx_buffer *buf;
1164
1165 buf = list_entry(vidq->active.next, struct em28xx_buffer, list);
1166 list_del(entry: &buf->list);
1167 vb2_buffer_done(vb: &buf->vb.vb2_buf, state: VB2_BUF_STATE_ERROR);
1168 }
1169 spin_unlock_irqrestore(lock: &dev->slock, flags);
1170}
1171
1172void em28xx_stop_vbi_streaming(struct vb2_queue *vq)
1173{
1174 struct em28xx *dev = vb2_get_drv_priv(q: 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, f_type: 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, mode: EM28XX_ANALOG_MODE);
1189 }
1190
1191 spin_lock_irqsave(&dev->slock, flags);
1192 if (dev->usb_ctl.vbi_buf) {
1193 vb2_buffer_done(vb: &dev->usb_ctl.vbi_buf->vb.vb2_buf,
1194 state: VB2_BUF_STATE_ERROR);
1195 dev->usb_ctl.vbi_buf = NULL;
1196 }
1197 while (!list_empty(head: &vbiq->active)) {
1198 struct em28xx_buffer *buf;
1199
1200 buf = list_entry(vbiq->active.next, struct em28xx_buffer, list);
1201 list_del(entry: &buf->list);
1202 vb2_buffer_done(vb: &buf->vb.vb2_buf, state: VB2_BUF_STATE_ERROR);
1203 }
1204 spin_unlock_irqrestore(lock: &dev->slock, flags);
1205}
1206
1207static void
1208buffer_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(q: 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, plane_no: 0);
1219 buf->length = vb2_plane_size(vb, plane_no: 0);
1220
1221 spin_lock_irqsave(&dev->slock, flags);
1222 list_add_tail(new: &buf->list, head: &vidq->active);
1223 spin_unlock_irqrestore(lock: &dev->slock, flags);
1224}
1225
1226static 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 .wait_prepare = vb2_ops_wait_prepare,
1233 .wait_finish = vb2_ops_wait_finish,
1234};
1235
1236static int em28xx_vb2_setup(struct em28xx *dev)
1237{
1238 int rc;
1239 struct vb2_queue *q;
1240 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1241
1242 /* Setup Videobuf2 for Video capture */
1243 q = &v4l2->vb_vidq;
1244 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1245 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1246 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1247 q->drv_priv = dev;
1248 q->buf_struct_size = sizeof(struct em28xx_buffer);
1249 q->ops = &em28xx_video_qops;
1250 q->mem_ops = &vb2_vmalloc_memops;
1251
1252 rc = vb2_queue_init(q);
1253 if (rc < 0)
1254 return rc;
1255
1256 /* Setup Videobuf2 for VBI capture */
1257 q = &v4l2->vb_vbiq;
1258 q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1259 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
1260 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1261 q->drv_priv = dev;
1262 q->buf_struct_size = sizeof(struct em28xx_buffer);
1263 q->ops = &em28xx_vbi_qops;
1264 q->mem_ops = &vb2_vmalloc_memops;
1265
1266 rc = vb2_queue_init(q);
1267 if (rc < 0)
1268 return rc;
1269
1270 return 0;
1271}
1272
1273/*
1274 * v4l2 interface
1275 */
1276
1277static void video_mux(struct em28xx *dev, int index)
1278{
1279 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
1280
1281 dev->ctl_input = index;
1282 dev->ctl_ainput = INPUT(index)->amux;
1283 dev->ctl_aoutput = INPUT(index)->aout;
1284
1285 if (!dev->ctl_aoutput)
1286 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1287
1288 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
1289 INPUT(index)->vmux, 0, 0);
1290
1291 if (dev->has_msp34xx) {
1292 if (dev->i2s_speed) {
1293 v4l2_device_call_all(v4l2_dev, 0, audio,
1294 s_i2s_clock_freq, dev->i2s_speed);
1295 }
1296 /* Note: this is msp3400 specific */
1297 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1298 dev->ctl_ainput,
1299 MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
1300 }
1301
1302 if (dev->board.adecoder != EM28XX_NOADECODER) {
1303 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1304 dev->ctl_ainput, dev->ctl_aoutput, 0);
1305 }
1306
1307 em28xx_audio_analog_set(dev);
1308}
1309
1310static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv)
1311{
1312 struct em28xx *dev = priv;
1313
1314 /*
1315 * In the case of non-AC97 volume controls, we still need
1316 * to do some setups at em28xx, in order to mute/unmute
1317 * and to adjust audio volume. However, the value ranges
1318 * should be checked by the corresponding V4L subdriver.
1319 */
1320 switch (ctrl->id) {
1321 case V4L2_CID_AUDIO_MUTE:
1322 dev->mute = ctrl->val;
1323 em28xx_audio_analog_set(dev);
1324 break;
1325 case V4L2_CID_AUDIO_VOLUME:
1326 dev->volume = ctrl->val;
1327 em28xx_audio_analog_set(dev);
1328 break;
1329 }
1330}
1331
1332static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl)
1333{
1334 struct em28xx_v4l2 *v4l2 =
1335 container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler);
1336 struct em28xx *dev = v4l2->dev;
1337 int ret = -EINVAL;
1338
1339 switch (ctrl->id) {
1340 case V4L2_CID_AUDIO_MUTE:
1341 dev->mute = ctrl->val;
1342 ret = em28xx_audio_analog_set(dev);
1343 break;
1344 case V4L2_CID_AUDIO_VOLUME:
1345 dev->volume = ctrl->val;
1346 ret = em28xx_audio_analog_set(dev);
1347 break;
1348 case V4L2_CID_CONTRAST:
1349 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, val: ctrl->val);
1350 break;
1351 case V4L2_CID_BRIGHTNESS:
1352 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, val: ctrl->val);
1353 break;
1354 case V4L2_CID_SATURATION:
1355 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, val: ctrl->val);
1356 break;
1357 case V4L2_CID_BLUE_BALANCE:
1358 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, val: ctrl->val);
1359 break;
1360 case V4L2_CID_RED_BALANCE:
1361 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, val: ctrl->val);
1362 break;
1363 case V4L2_CID_SHARPNESS:
1364 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, val: ctrl->val);
1365 break;
1366 }
1367
1368 return (ret < 0) ? ret : 0;
1369}
1370
1371static const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
1372 .s_ctrl = em28xx_s_ctrl,
1373};
1374
1375static void size_to_scale(struct em28xx *dev,
1376 unsigned int width, unsigned int height,
1377 unsigned int *hscale, unsigned int *vscale)
1378{
1379 unsigned int maxw = norm_maxw(dev);
1380 unsigned int maxh = norm_maxh(dev);
1381
1382 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1383 if (*hscale > EM28XX_HVSCALE_MAX)
1384 *hscale = EM28XX_HVSCALE_MAX;
1385
1386 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1387 if (*vscale > EM28XX_HVSCALE_MAX)
1388 *vscale = EM28XX_HVSCALE_MAX;
1389}
1390
1391static void scale_to_size(struct em28xx *dev,
1392 unsigned int hscale, unsigned int vscale,
1393 unsigned int *width, unsigned int *height)
1394{
1395 unsigned int maxw = norm_maxw(dev);
1396 unsigned int maxh = norm_maxh(dev);
1397
1398 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1399 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1400
1401 /* Don't let width or height to be zero */
1402 if (*width < 1)
1403 *width = 1;
1404 if (*height < 1)
1405 *height = 1;
1406}
1407
1408/*
1409 * IOCTL vidioc handling
1410 */
1411
1412static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1413 struct v4l2_format *f)
1414{
1415 struct em28xx *dev = video_drvdata(file);
1416 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1417
1418 f->fmt.pix.width = v4l2->width;
1419 f->fmt.pix.height = v4l2->height;
1420 f->fmt.pix.pixelformat = v4l2->format->fourcc;
1421 f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3;
1422 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height;
1423 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1424
1425 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1426 if (v4l2->progressive)
1427 f->fmt.pix.field = V4L2_FIELD_NONE;
1428 else
1429 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1430 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1431 return 0;
1432}
1433
1434static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1435{
1436 unsigned int i;
1437
1438 for (i = 0; i < ARRAY_SIZE(format); i++)
1439 if (format[i].fourcc == fourcc)
1440 return &format[i];
1441
1442 return NULL;
1443}
1444
1445static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1446 struct v4l2_format *f)
1447{
1448 struct em28xx *dev = video_drvdata(file);
1449 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1450 unsigned int width = f->fmt.pix.width;
1451 unsigned int height = f->fmt.pix.height;
1452 unsigned int maxw = norm_maxw(dev);
1453 unsigned int maxh = norm_maxh(dev);
1454 unsigned int hscale, vscale;
1455 struct em28xx_fmt *fmt;
1456
1457 fmt = format_by_fourcc(fourcc: f->fmt.pix.pixelformat);
1458 if (!fmt) {
1459 fmt = &format[0];
1460 em28xx_videodbg("Fourcc format (%08x) invalid. Using default (%08x).\n",
1461 f->fmt.pix.pixelformat, fmt->fourcc);
1462 }
1463
1464 if (dev->board.is_em2800) {
1465 /* the em2800 can only scale down to 50% */
1466 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1467 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1468 /*
1469 * MaxPacketSize for em2800 is too small to capture at full
1470 * resolution use half of maxw as the scaler can only scale
1471 * to 50%
1472 */
1473 if (width == maxw && height == maxh)
1474 width /= 2;
1475 } else {
1476 /*
1477 * width must even because of the YUYV format
1478 * height must be even because of interlacing
1479 */
1480 v4l_bound_align_image(width: &width, wmin: 48, wmax: maxw, walign: 1, height: &height, hmin: 32, hmax: maxh,
1481 halign: 1, salign: 0);
1482 }
1483 /* Avoid division by zero at size_to_scale */
1484 if (width < 1)
1485 width = 1;
1486 if (height < 1)
1487 height = 1;
1488
1489 size_to_scale(dev, width, height, hscale: &hscale, vscale: &vscale);
1490 scale_to_size(dev, hscale, vscale, width: &width, height: &height);
1491
1492 f->fmt.pix.width = width;
1493 f->fmt.pix.height = height;
1494 f->fmt.pix.pixelformat = fmt->fourcc;
1495 f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
1496 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1497 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1498 if (v4l2->progressive)
1499 f->fmt.pix.field = V4L2_FIELD_NONE;
1500 else
1501 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1502 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1503
1504 return 0;
1505}
1506
1507static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1508 unsigned int width, unsigned int height)
1509{
1510 struct em28xx_fmt *fmt;
1511 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1512
1513 fmt = format_by_fourcc(fourcc);
1514 if (!fmt)
1515 return -EINVAL;
1516
1517 v4l2->format = fmt;
1518 v4l2->width = width;
1519 v4l2->height = height;
1520
1521 /* set new image size */
1522 size_to_scale(dev, width: v4l2->width, height: v4l2->height,
1523 hscale: &v4l2->hscale, vscale: &v4l2->vscale);
1524
1525 em28xx_resolution_set(dev);
1526
1527 return 0;
1528}
1529
1530static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1531 struct v4l2_format *f)
1532{
1533 struct em28xx *dev = video_drvdata(file);
1534 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1535
1536 if (vb2_is_busy(q: &v4l2->vb_vidq))
1537 return -EBUSY;
1538
1539 vidioc_try_fmt_vid_cap(file, priv, f);
1540
1541 return em28xx_set_video_format(dev, fourcc: f->fmt.pix.pixelformat,
1542 width: f->fmt.pix.width, height: f->fmt.pix.height);
1543}
1544
1545static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1546{
1547 struct em28xx *dev = video_drvdata(file);
1548
1549 *norm = dev->v4l2->norm;
1550
1551 return 0;
1552}
1553
1554static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
1555{
1556 struct em28xx *dev = video_drvdata(file);
1557
1558 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm);
1559
1560 return 0;
1561}
1562
1563static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
1564{
1565 struct em28xx *dev = video_drvdata(file);
1566 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1567 struct v4l2_format f;
1568
1569 if (norm == v4l2->norm)
1570 return 0;
1571
1572 if (v4l2->streaming_users > 0)
1573 return -EBUSY;
1574
1575 v4l2->norm = norm;
1576
1577 /* Adjusts width/height, if needed */
1578 f.fmt.pix.width = 720;
1579 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576;
1580 vidioc_try_fmt_vid_cap(file, priv, f: &f);
1581
1582 /* set new image size */
1583 v4l2->width = f.fmt.pix.width;
1584 v4l2->height = f.fmt.pix.height;
1585 size_to_scale(dev, width: v4l2->width, height: v4l2->height,
1586 hscale: &v4l2->hscale, vscale: &v4l2->vscale);
1587
1588 em28xx_resolution_set(dev);
1589 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
1590
1591 return 0;
1592}
1593
1594static int vidioc_g_parm(struct file *file, void *priv,
1595 struct v4l2_streamparm *p)
1596{
1597 struct v4l2_subdev_frame_interval ival = { 0 };
1598 struct em28xx *dev = video_drvdata(file);
1599 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1600 int rc = 0;
1601
1602 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1603 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1604 return -EINVAL;
1605
1606 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1607 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1608 if (dev->is_webcam) {
1609 rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0,
1610 pad, get_frame_interval, NULL,
1611 &ival);
1612 if (!rc)
1613 p->parm.capture.timeperframe = ival.interval;
1614 } else {
1615 v4l2_video_std_frame_period(id: v4l2->norm,
1616 frameperiod: &p->parm.capture.timeperframe);
1617 }
1618
1619 return rc;
1620}
1621
1622static int vidioc_s_parm(struct file *file, void *priv,
1623 struct v4l2_streamparm *p)
1624{
1625 struct em28xx *dev = video_drvdata(file);
1626 struct v4l2_subdev_frame_interval ival = {
1627 0,
1628 p->parm.capture.timeperframe
1629 };
1630 int rc = 0;
1631
1632 if (!dev->is_webcam)
1633 return -ENOTTY;
1634
1635 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1636 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1637 return -EINVAL;
1638
1639 memset(&p->parm, 0, sizeof(p->parm));
1640 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1641 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1642 rc = v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 0,
1643 pad, set_frame_interval, NULL,
1644 &ival);
1645 if (!rc)
1646 p->parm.capture.timeperframe = ival.interval;
1647 return rc;
1648}
1649
1650static int vidioc_enum_input(struct file *file, void *priv,
1651 struct v4l2_input *i)
1652{
1653 struct em28xx *dev = video_drvdata(file);
1654 unsigned int n;
1655 int j;
1656
1657 n = i->index;
1658 if (n >= MAX_EM28XX_INPUT)
1659 return -EINVAL;
1660 if (!INPUT(n)->type)
1661 return -EINVAL;
1662
1663 i->type = V4L2_INPUT_TYPE_CAMERA;
1664
1665 strscpy(i->name, iname[INPUT(n)->type], sizeof(i->name));
1666
1667 if (INPUT(n)->type == EM28XX_VMUX_TELEVISION)
1668 i->type = V4L2_INPUT_TYPE_TUNER;
1669
1670 i->std = dev->v4l2->vdev.tvnorms;
1671 /* webcams do not have the STD API */
1672 if (dev->is_webcam)
1673 i->capabilities = 0;
1674
1675 /* Dynamically generates an audioset bitmask */
1676 i->audioset = 0;
1677 for (j = 0; j < MAX_EM28XX_INPUT; j++)
1678 if (dev->amux_map[j] != EM28XX_AMUX_UNUSED)
1679 i->audioset |= 1 << j;
1680
1681 return 0;
1682}
1683
1684static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1685{
1686 struct em28xx *dev = video_drvdata(file);
1687
1688 *i = dev->ctl_input;
1689
1690 return 0;
1691}
1692
1693static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1694{
1695 struct em28xx *dev = video_drvdata(file);
1696
1697 if (i >= MAX_EM28XX_INPUT)
1698 return -EINVAL;
1699 if (!INPUT(i)->type)
1700 return -EINVAL;
1701
1702 video_mux(dev, index: i);
1703 return 0;
1704}
1705
1706static int em28xx_fill_audio_input(struct em28xx *dev,
1707 const char *s,
1708 struct v4l2_audio *a,
1709 unsigned int index)
1710{
1711 unsigned int idx = dev->amux_map[index];
1712
1713 /*
1714 * With msp3400, almost all mappings use the default (amux = 0).
1715 * The only one may use a different value is WinTV USB2, where it
1716 * can also be SCART1 input.
1717 * As it is very doubtful that we would see new boards with msp3400,
1718 * let's just reuse the existing switch.
1719 */
1720 if (dev->has_msp34xx && idx != EM28XX_AMUX_UNUSED)
1721 idx = EM28XX_AMUX_LINE_IN;
1722
1723 switch (idx) {
1724 case EM28XX_AMUX_VIDEO:
1725 strscpy(a->name, "Television", sizeof(a->name));
1726 break;
1727 case EM28XX_AMUX_LINE_IN:
1728 strscpy(a->name, "Line In", sizeof(a->name));
1729 break;
1730 case EM28XX_AMUX_VIDEO2:
1731 strscpy(a->name, "Television alt", sizeof(a->name));
1732 break;
1733 case EM28XX_AMUX_PHONE:
1734 strscpy(a->name, "Phone", sizeof(a->name));
1735 break;
1736 case EM28XX_AMUX_MIC:
1737 strscpy(a->name, "Mic", sizeof(a->name));
1738 break;
1739 case EM28XX_AMUX_CD:
1740 strscpy(a->name, "CD", sizeof(a->name));
1741 break;
1742 case EM28XX_AMUX_AUX:
1743 strscpy(a->name, "Aux", sizeof(a->name));
1744 break;
1745 case EM28XX_AMUX_PCM_OUT:
1746 strscpy(a->name, "PCM", sizeof(a->name));
1747 break;
1748 case EM28XX_AMUX_UNUSED:
1749 default:
1750 return -EINVAL;
1751 }
1752 a->index = index;
1753 a->capability = V4L2_AUDCAP_STEREO;
1754
1755 em28xx_videodbg("%s: audio input index %d is '%s'\n",
1756 s, a->index, a->name);
1757
1758 return 0;
1759}
1760
1761static int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *a)
1762{
1763 struct em28xx *dev = video_drvdata(file);
1764
1765 if (a->index >= MAX_EM28XX_INPUT)
1766 return -EINVAL;
1767
1768 return em28xx_fill_audio_input(dev, s: __func__, a, index: a->index);
1769}
1770
1771static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1772{
1773 struct em28xx *dev = video_drvdata(file);
1774 int i;
1775
1776 for (i = 0; i < MAX_EM28XX_INPUT; i++)
1777 if (dev->ctl_ainput == dev->amux_map[i])
1778 return em28xx_fill_audio_input(dev, s: __func__, a, index: i);
1779
1780 /* Should never happen! */
1781 return -EINVAL;
1782}
1783
1784static int vidioc_s_audio(struct file *file, void *priv,
1785 const struct v4l2_audio *a)
1786{
1787 struct em28xx *dev = video_drvdata(file);
1788 int idx, i;
1789
1790 if (a->index >= MAX_EM28XX_INPUT)
1791 return -EINVAL;
1792
1793 idx = dev->amux_map[a->index];
1794
1795 if (idx == EM28XX_AMUX_UNUSED)
1796 return -EINVAL;
1797
1798 dev->ctl_ainput = idx;
1799
1800 /*
1801 * FIXME: This is wrong, as different inputs at em28xx_cards
1802 * may have different audio outputs. So, the right thing
1803 * to do is to implement VIDIOC_G_AUDOUT/VIDIOC_S_AUDOUT.
1804 * With the current board definitions, this would work fine,
1805 * as, currently, all boards fit.
1806 */
1807 for (i = 0; i < MAX_EM28XX_INPUT; i++)
1808 if (idx == dev->amux_map[i])
1809 break;
1810 if (i == MAX_EM28XX_INPUT)
1811 return -EINVAL;
1812
1813 dev->ctl_aoutput = INPUT(i)->aout;
1814
1815 if (!dev->ctl_aoutput)
1816 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1817
1818 em28xx_videodbg("%s: set audio input to %d\n", __func__,
1819 dev->ctl_ainput);
1820
1821 return 0;
1822}
1823
1824static int vidioc_g_tuner(struct file *file, void *priv,
1825 struct v4l2_tuner *t)
1826{
1827 struct em28xx *dev = video_drvdata(file);
1828
1829 if (t->index != 0)
1830 return -EINVAL;
1831
1832 strscpy(t->name, "Tuner", sizeof(t->name));
1833
1834 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
1835 return 0;
1836}
1837
1838static int vidioc_s_tuner(struct file *file, void *priv,
1839 const struct v4l2_tuner *t)
1840{
1841 struct em28xx *dev = video_drvdata(file);
1842
1843 if (t->index != 0)
1844 return -EINVAL;
1845
1846 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
1847 return 0;
1848}
1849
1850static int vidioc_g_frequency(struct file *file, void *priv,
1851 struct v4l2_frequency *f)
1852{
1853 struct em28xx *dev = video_drvdata(file);
1854 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1855
1856 if (f->tuner != 0)
1857 return -EINVAL;
1858
1859 f->frequency = v4l2->frequency;
1860 return 0;
1861}
1862
1863static int vidioc_s_frequency(struct file *file, void *priv,
1864 const struct v4l2_frequency *f)
1865{
1866 struct v4l2_frequency new_freq = *f;
1867 struct em28xx *dev = video_drvdata(file);
1868 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1869
1870 if (f->tuner != 0)
1871 return -EINVAL;
1872
1873 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f);
1874 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq);
1875 v4l2->frequency = new_freq.frequency;
1876
1877 return 0;
1878}
1879
1880#ifdef CONFIG_VIDEO_ADV_DEBUG
1881static int vidioc_g_chip_info(struct file *file, void *priv,
1882 struct v4l2_dbg_chip_info *chip)
1883{
1884 struct em28xx *dev = video_drvdata(file);
1885
1886 if (chip->match.addr > 1)
1887 return -EINVAL;
1888 if (chip->match.addr == 1)
1889 strscpy(chip->name, "ac97", sizeof(chip->name));
1890 else
1891 strscpy(chip->name,
1892 dev->v4l2->v4l2_dev.name, sizeof(chip->name));
1893 return 0;
1894}
1895
1896static int em28xx_reg_len(int reg)
1897{
1898 switch (reg) {
1899 case EM28XX_R40_AC97LSB:
1900 case EM28XX_R30_HSCALELOW:
1901 case EM28XX_R32_VSCALELOW:
1902 return 2;
1903 default:
1904 return 1;
1905 }
1906}
1907
1908static int vidioc_g_register(struct file *file, void *priv,
1909 struct v4l2_dbg_register *reg)
1910{
1911 struct em28xx *dev = video_drvdata(file);
1912 int ret;
1913
1914 if (reg->match.addr > 1)
1915 return -EINVAL;
1916 if (reg->match.addr) {
1917 ret = em28xx_read_ac97(dev, reg: reg->reg);
1918 if (ret < 0)
1919 return ret;
1920
1921 reg->val = ret;
1922 reg->size = 1;
1923 return 0;
1924 }
1925
1926 /* Match host */
1927 reg->size = em28xx_reg_len(reg: reg->reg);
1928 if (reg->size == 1) {
1929 ret = em28xx_read_reg(dev, reg: reg->reg);
1930
1931 if (ret < 0)
1932 return ret;
1933
1934 reg->val = ret;
1935 } else {
1936 __le16 val = 0;
1937
1938 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1939 reg->reg, (char *)&val, 2);
1940 if (ret < 0)
1941 return ret;
1942
1943 reg->val = le16_to_cpu(val);
1944 }
1945
1946 return 0;
1947}
1948
1949static int vidioc_s_register(struct file *file, void *priv,
1950 const struct v4l2_dbg_register *reg)
1951{
1952 struct em28xx *dev = video_drvdata(file);
1953 __le16 buf;
1954
1955 if (reg->match.addr > 1)
1956 return -EINVAL;
1957 if (reg->match.addr)
1958 return em28xx_write_ac97(dev, reg: reg->reg, val: reg->val);
1959
1960 /* Match host */
1961 buf = cpu_to_le16(reg->val);
1962
1963 return em28xx_write_regs(dev, reg: reg->reg, buf: (char *)&buf,
1964 len: em28xx_reg_len(reg: reg->reg));
1965}
1966#endif
1967
1968static int vidioc_querycap(struct file *file, void *priv,
1969 struct v4l2_capability *cap)
1970{
1971 struct em28xx *dev = video_drvdata(file);
1972 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1973 struct usb_device *udev = interface_to_usbdev(dev->intf);
1974
1975 strscpy(cap->driver, "em28xx", sizeof(cap->driver));
1976 strscpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1977 usb_make_path(dev: udev, buf: cap->bus_info, size: sizeof(cap->bus_info));
1978
1979 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_READWRITE |
1980 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1981 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
1982 cap->capabilities |= V4L2_CAP_AUDIO;
1983 if (dev->tuner_type != TUNER_ABSENT)
1984 cap->capabilities |= V4L2_CAP_TUNER;
1985 if (video_is_registered(vdev: &v4l2->vbi_dev))
1986 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1987 if (video_is_registered(vdev: &v4l2->radio_dev))
1988 cap->capabilities |= V4L2_CAP_RADIO;
1989 return 0;
1990}
1991
1992static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1993 struct v4l2_fmtdesc *f)
1994{
1995 if (unlikely(f->index >= ARRAY_SIZE(format)))
1996 return -EINVAL;
1997
1998 f->pixelformat = format[f->index].fourcc;
1999
2000 return 0;
2001}
2002
2003static int vidioc_enum_framesizes(struct file *file, void *priv,
2004 struct v4l2_frmsizeenum *fsize)
2005{
2006 struct em28xx *dev = video_drvdata(file);
2007 struct em28xx_fmt *fmt;
2008 unsigned int maxw = norm_maxw(dev);
2009 unsigned int maxh = norm_maxh(dev);
2010
2011 fmt = format_by_fourcc(fourcc: fsize->pixel_format);
2012 if (!fmt) {
2013 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
2014 fsize->pixel_format);
2015 return -EINVAL;
2016 }
2017
2018 if (dev->board.is_em2800) {
2019 if (fsize->index > 1)
2020 return -EINVAL;
2021 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
2022 fsize->discrete.width = maxw / (1 + fsize->index);
2023 fsize->discrete.height = maxh / (1 + fsize->index);
2024 return 0;
2025 }
2026
2027 if (fsize->index != 0)
2028 return -EINVAL;
2029
2030 /* Report a continuous range */
2031 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
2032 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
2033 width: &fsize->stepwise.min_width, height: &fsize->stepwise.min_height);
2034 if (fsize->stepwise.min_width < 48)
2035 fsize->stepwise.min_width = 48;
2036 if (fsize->stepwise.min_height < 38)
2037 fsize->stepwise.min_height = 38;
2038 fsize->stepwise.max_width = maxw;
2039 fsize->stepwise.max_height = maxh;
2040 fsize->stepwise.step_width = 1;
2041 fsize->stepwise.step_height = 1;
2042 return 0;
2043}
2044
2045/* RAW VBI ioctls */
2046
2047static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
2048 struct v4l2_format *format)
2049{
2050 struct em28xx *dev = video_drvdata(file);
2051 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2052
2053 format->fmt.vbi.samples_per_line = v4l2->vbi_width;
2054 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
2055 format->fmt.vbi.offset = 0;
2056 format->fmt.vbi.flags = 0;
2057 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
2058 format->fmt.vbi.count[0] = v4l2->vbi_height;
2059 format->fmt.vbi.count[1] = v4l2->vbi_height;
2060 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
2061
2062 /* Varies by video standard (NTSC, PAL, etc.) */
2063 if (v4l2->norm & V4L2_STD_525_60) {
2064 /* NTSC */
2065 format->fmt.vbi.start[0] = 10;
2066 format->fmt.vbi.start[1] = 273;
2067 } else if (v4l2->norm & V4L2_STD_625_50) {
2068 /* PAL */
2069 format->fmt.vbi.start[0] = 6;
2070 format->fmt.vbi.start[1] = 318;
2071 }
2072
2073 return 0;
2074}
2075
2076/*
2077 * RADIO ESPECIFIC IOCTLS
2078 */
2079
2080static int radio_g_tuner(struct file *file, void *priv,
2081 struct v4l2_tuner *t)
2082{
2083 struct em28xx *dev = video_drvdata(file);
2084
2085 if (unlikely(t->index > 0))
2086 return -EINVAL;
2087
2088 strscpy(t->name, "Radio", sizeof(t->name));
2089
2090 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
2091
2092 return 0;
2093}
2094
2095static int radio_s_tuner(struct file *file, void *priv,
2096 const struct v4l2_tuner *t)
2097{
2098 struct em28xx *dev = video_drvdata(file);
2099
2100 if (t->index != 0)
2101 return -EINVAL;
2102
2103 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
2104
2105 return 0;
2106}
2107
2108/*
2109 * em28xx_free_v4l2() - Free struct em28xx_v4l2
2110 *
2111 * @ref: struct kref for struct em28xx_v4l2
2112 *
2113 * Called when all users of struct em28xx_v4l2 are gone
2114 */
2115static void em28xx_free_v4l2(struct kref *ref)
2116{
2117 struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref);
2118
2119 v4l2->dev->v4l2 = NULL;
2120 kfree(objp: v4l2);
2121}
2122
2123/*
2124 * em28xx_v4l2_open()
2125 * inits the device and starts isoc transfer
2126 */
2127static int em28xx_v4l2_open(struct file *filp)
2128{
2129 struct video_device *vdev = video_devdata(file: filp);
2130 struct em28xx *dev = video_drvdata(file: filp);
2131 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2132 enum v4l2_buf_type fh_type = 0;
2133 int ret;
2134
2135 switch (vdev->vfl_type) {
2136 case VFL_TYPE_VIDEO:
2137 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2138 break;
2139 case VFL_TYPE_VBI:
2140 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2141 break;
2142 case VFL_TYPE_RADIO:
2143 break;
2144 default:
2145 return -EINVAL;
2146 }
2147
2148 em28xx_videodbg("open dev=%s type=%s users=%d\n",
2149 video_device_node_name(vdev), v4l2_type_names[fh_type],
2150 v4l2->users);
2151
2152 if (mutex_lock_interruptible(&dev->lock))
2153 return -ERESTARTSYS;
2154
2155 ret = v4l2_fh_open(filp);
2156 if (ret) {
2157 dev_err(&dev->intf->dev,
2158 "%s: v4l2_fh_open() returned error %d\n",
2159 __func__, ret);
2160 mutex_unlock(lock: &dev->lock);
2161 return ret;
2162 }
2163
2164 if (v4l2->users == 0) {
2165 em28xx_set_mode(dev, set_mode: EM28XX_ANALOG_MODE);
2166
2167 if (vdev->vfl_type != VFL_TYPE_RADIO)
2168 em28xx_resolution_set(dev);
2169
2170 /*
2171 * Needed, since GPIO might have disabled power
2172 * of some i2c devices
2173 */
2174 em28xx_wake_i2c(dev);
2175 }
2176
2177 if (vdev->vfl_type == VFL_TYPE_RADIO) {
2178 em28xx_videodbg("video_open: setting radio device\n");
2179 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio);
2180 }
2181
2182 kref_get(kref: &dev->ref);
2183 kref_get(kref: &v4l2->ref);
2184 v4l2->users++;
2185
2186 mutex_unlock(lock: &dev->lock);
2187
2188 return 0;
2189}
2190
2191/*
2192 * em28xx_v4l2_fini()
2193 * unregisters the v4l2,i2c and usb devices
2194 * called when the device gets disconnected or at module unload
2195 */
2196static int em28xx_v4l2_fini(struct em28xx *dev)
2197{
2198 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2199
2200 if (dev->is_audio_only) {
2201 /* Shouldn't initialize IR for this interface */
2202 return 0;
2203 }
2204
2205 if (!dev->has_video) {
2206 /* This device does not support the v4l2 extension */
2207 return 0;
2208 }
2209
2210 if (!v4l2)
2211 return 0;
2212
2213 dev_info(&dev->intf->dev, "Closing video extension\n");
2214
2215 mutex_lock(&dev->lock);
2216
2217 v4l2_device_disconnect(v4l2_dev: &v4l2->v4l2_dev);
2218
2219 em28xx_uninit_usb_xfer(dev, mode: EM28XX_ANALOG_MODE);
2220
2221 em28xx_v4l2_media_release(dev);
2222
2223 if (video_is_registered(vdev: &v4l2->radio_dev)) {
2224 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2225 video_device_node_name(&v4l2->radio_dev));
2226 video_unregister_device(vdev: &v4l2->radio_dev);
2227 }
2228 if (video_is_registered(vdev: &v4l2->vbi_dev)) {
2229 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2230 video_device_node_name(&v4l2->vbi_dev));
2231 video_unregister_device(vdev: &v4l2->vbi_dev);
2232 }
2233 if (video_is_registered(vdev: &v4l2->vdev)) {
2234 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2235 video_device_node_name(&v4l2->vdev));
2236 video_unregister_device(vdev: &v4l2->vdev);
2237 }
2238
2239 v4l2_ctrl_handler_free(hdl: &v4l2->ctrl_handler);
2240 v4l2_device_unregister(v4l2_dev: &v4l2->v4l2_dev);
2241
2242 kref_put(kref: &v4l2->ref, release: em28xx_free_v4l2);
2243
2244 mutex_unlock(lock: &dev->lock);
2245
2246 kref_put(kref: &dev->ref, release: em28xx_free_device);
2247
2248 return 0;
2249}
2250
2251static int em28xx_v4l2_suspend(struct em28xx *dev)
2252{
2253 if (dev->is_audio_only)
2254 return 0;
2255
2256 if (!dev->has_video)
2257 return 0;
2258
2259 dev_info(&dev->intf->dev, "Suspending video extension\n");
2260 em28xx_stop_urbs(dev);
2261 return 0;
2262}
2263
2264static int em28xx_v4l2_resume(struct em28xx *dev)
2265{
2266 if (dev->is_audio_only)
2267 return 0;
2268
2269 if (!dev->has_video)
2270 return 0;
2271
2272 dev_info(&dev->intf->dev, "Resuming video extension\n");
2273 /* what do we do here */
2274 return 0;
2275}
2276
2277/*
2278 * em28xx_v4l2_close()
2279 * stops streaming and deallocates all resources allocated by the v4l2
2280 * calls and ioctls
2281 */
2282static int em28xx_v4l2_close(struct file *filp)
2283{
2284 struct em28xx *dev = video_drvdata(file: filp);
2285 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2286 struct usb_device *udev = interface_to_usbdev(dev->intf);
2287 int err;
2288
2289 em28xx_videodbg("users=%d\n", v4l2->users);
2290
2291 vb2_fop_release(file: filp);
2292 mutex_lock(&dev->lock);
2293
2294 if (v4l2->users == 1) {
2295 /* No sense to try to write to the device */
2296 if (dev->disconnected)
2297 goto exit;
2298
2299 /* Save some power by putting tuner to sleep */
2300 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2301
2302 /* do this before setting alternate! */
2303 em28xx_set_mode(dev, set_mode: EM28XX_SUSPEND);
2304
2305 /* set alternate 0 */
2306 dev->alt = 0;
2307 em28xx_videodbg("setting alternate 0\n");
2308 err = usb_set_interface(dev: udev, ifnum: 0, alternate: 0);
2309 if (err < 0) {
2310 dev_err(&dev->intf->dev,
2311 "cannot change alternate number to 0 (error=%i)\n",
2312 err);
2313 }
2314 }
2315
2316exit:
2317 v4l2->users--;
2318 kref_put(kref: &v4l2->ref, release: em28xx_free_v4l2);
2319 mutex_unlock(lock: &dev->lock);
2320 kref_put(kref: &dev->ref, release: em28xx_free_device);
2321
2322 return 0;
2323}
2324
2325static const struct v4l2_file_operations em28xx_v4l_fops = {
2326 .owner = THIS_MODULE,
2327 .open = em28xx_v4l2_open,
2328 .release = em28xx_v4l2_close,
2329 .read = vb2_fop_read,
2330 .poll = vb2_fop_poll,
2331 .mmap = vb2_fop_mmap,
2332 .unlocked_ioctl = video_ioctl2,
2333};
2334
2335static const struct v4l2_ioctl_ops video_ioctl_ops = {
2336 .vidioc_querycap = vidioc_querycap,
2337 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2338 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2339 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2340 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
2341 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2342 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2343 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2344 .vidioc_enum_framesizes = vidioc_enum_framesizes,
2345 .vidioc_enumaudio = vidioc_enumaudio,
2346 .vidioc_g_audio = vidioc_g_audio,
2347 .vidioc_s_audio = vidioc_s_audio,
2348
2349 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2350 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2351 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
2352 .vidioc_querybuf = vb2_ioctl_querybuf,
2353 .vidioc_qbuf = vb2_ioctl_qbuf,
2354 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2355
2356 .vidioc_g_std = vidioc_g_std,
2357 .vidioc_querystd = vidioc_querystd,
2358 .vidioc_s_std = vidioc_s_std,
2359 .vidioc_g_parm = vidioc_g_parm,
2360 .vidioc_s_parm = vidioc_s_parm,
2361 .vidioc_enum_input = vidioc_enum_input,
2362 .vidioc_g_input = vidioc_g_input,
2363 .vidioc_s_input = vidioc_s_input,
2364 .vidioc_streamon = vb2_ioctl_streamon,
2365 .vidioc_streamoff = vb2_ioctl_streamoff,
2366 .vidioc_g_tuner = vidioc_g_tuner,
2367 .vidioc_s_tuner = vidioc_s_tuner,
2368 .vidioc_g_frequency = vidioc_g_frequency,
2369 .vidioc_s_frequency = vidioc_s_frequency,
2370 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2371 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2372#ifdef CONFIG_VIDEO_ADV_DEBUG
2373 .vidioc_g_chip_info = vidioc_g_chip_info,
2374 .vidioc_g_register = vidioc_g_register,
2375 .vidioc_s_register = vidioc_s_register,
2376#endif
2377};
2378
2379static const struct video_device em28xx_video_template = {
2380 .fops = &em28xx_v4l_fops,
2381 .ioctl_ops = &video_ioctl_ops,
2382 .release = video_device_release_empty,
2383 .tvnorms = V4L2_STD_ALL,
2384};
2385
2386static const struct v4l2_file_operations radio_fops = {
2387 .owner = THIS_MODULE,
2388 .open = em28xx_v4l2_open,
2389 .release = em28xx_v4l2_close,
2390 .unlocked_ioctl = video_ioctl2,
2391};
2392
2393static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2394 .vidioc_querycap = vidioc_querycap,
2395 .vidioc_g_tuner = radio_g_tuner,
2396 .vidioc_s_tuner = radio_s_tuner,
2397 .vidioc_g_frequency = vidioc_g_frequency,
2398 .vidioc_s_frequency = vidioc_s_frequency,
2399 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2400 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2401#ifdef CONFIG_VIDEO_ADV_DEBUG
2402 .vidioc_g_chip_info = vidioc_g_chip_info,
2403 .vidioc_g_register = vidioc_g_register,
2404 .vidioc_s_register = vidioc_s_register,
2405#endif
2406};
2407
2408static struct video_device em28xx_radio_template = {
2409 .fops = &radio_fops,
2410 .ioctl_ops = &radio_ioctl_ops,
2411 .release = video_device_release_empty,
2412};
2413
2414/* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */
2415static unsigned short saa711x_addrs[] = {
2416 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */
2417 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */
2418 I2C_CLIENT_END };
2419
2420static unsigned short tvp5150_addrs[] = {
2421 0xb8 >> 1,
2422 0xba >> 1,
2423 I2C_CLIENT_END
2424};
2425
2426static unsigned short msp3400_addrs[] = {
2427 0x80 >> 1,
2428 0x88 >> 1,
2429 I2C_CLIENT_END
2430};
2431
2432/******************************** usb interface ******************************/
2433
2434static void em28xx_vdev_init(struct em28xx *dev,
2435 struct video_device *vfd,
2436 const struct video_device *template,
2437 const char *type_name)
2438{
2439 *vfd = *template;
2440 vfd->v4l2_dev = &dev->v4l2->v4l2_dev;
2441 vfd->lock = &dev->lock;
2442 if (dev->is_webcam)
2443 vfd->tvnorms = 0;
2444
2445 snprintf(buf: vfd->name, size: sizeof(vfd->name), fmt: "%s %s",
2446 dev_name(dev: &dev->intf->dev), type_name);
2447
2448 video_set_drvdata(vdev: vfd, data: dev);
2449}
2450
2451static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr)
2452{
2453 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2454 struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev;
2455 struct tuner_setup tun_setup;
2456 struct v4l2_frequency f;
2457
2458 memset(&tun_setup, 0, sizeof(tun_setup));
2459
2460 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
2461 tun_setup.tuner_callback = em28xx_tuner_callback;
2462
2463 if (dev->board.radio.type) {
2464 tun_setup.type = dev->board.radio.type;
2465 tun_setup.addr = dev->board.radio_addr;
2466
2467 v4l2_device_call_all(v4l2_dev,
2468 0, tuner, s_type_addr, &tun_setup);
2469 }
2470
2471 if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type) {
2472 tun_setup.type = dev->tuner_type;
2473 tun_setup.addr = tuner_addr;
2474
2475 v4l2_device_call_all(v4l2_dev,
2476 0, tuner, s_type_addr, &tun_setup);
2477 }
2478
2479 if (dev->board.tda9887_conf) {
2480 struct v4l2_priv_tun_config tda9887_cfg;
2481
2482 tda9887_cfg.tuner = TUNER_TDA9887;
2483 tda9887_cfg.priv = &dev->board.tda9887_conf;
2484
2485 v4l2_device_call_all(v4l2_dev,
2486 0, tuner, s_config, &tda9887_cfg);
2487 }
2488
2489 if (dev->tuner_type == TUNER_XC2028) {
2490 struct v4l2_priv_tun_config xc2028_cfg;
2491 struct xc2028_ctrl ctl;
2492
2493 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg));
2494 memset(&ctl, 0, sizeof(ctl));
2495
2496 em28xx_setup_xc3028(dev, ctl: &ctl);
2497
2498 xc2028_cfg.tuner = TUNER_XC2028;
2499 xc2028_cfg.priv = &ctl;
2500
2501 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg);
2502 }
2503
2504 /* configure tuner */
2505 f.tuner = 0;
2506 f.type = V4L2_TUNER_ANALOG_TV;
2507 f.frequency = 9076; /* just a magic number */
2508 v4l2->frequency = f.frequency;
2509 v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f);
2510}
2511
2512static int em28xx_v4l2_init(struct em28xx *dev)
2513{
2514 u8 val;
2515 int ret;
2516 unsigned int maxw;
2517 struct v4l2_ctrl_handler *hdl;
2518 struct em28xx_v4l2 *v4l2;
2519
2520 if (dev->is_audio_only) {
2521 /* Shouldn't initialize IR for this interface */
2522 return 0;
2523 }
2524
2525 if (!dev->has_video) {
2526 /* This device does not support the v4l2 extension */
2527 return 0;
2528 }
2529
2530 dev_info(&dev->intf->dev, "Registering V4L2 extension\n");
2531
2532 mutex_lock(&dev->lock);
2533
2534 v4l2 = kzalloc(size: sizeof(*v4l2), GFP_KERNEL);
2535 if (!v4l2) {
2536 mutex_unlock(lock: &dev->lock);
2537 return -ENOMEM;
2538 }
2539 kref_init(kref: &v4l2->ref);
2540 v4l2->dev = dev;
2541 dev->v4l2 = v4l2;
2542
2543#ifdef CONFIG_MEDIA_CONTROLLER
2544 v4l2->v4l2_dev.mdev = dev->media_dev;
2545#endif
2546 ret = v4l2_device_register(dev: &dev->intf->dev, v4l2_dev: &v4l2->v4l2_dev);
2547 if (ret < 0) {
2548 dev_err(&dev->intf->dev,
2549 "Call to v4l2_device_register() failed!\n");
2550 goto err;
2551 }
2552
2553 hdl = &v4l2->ctrl_handler;
2554 v4l2_ctrl_handler_init(hdl, 8);
2555 v4l2->v4l2_dev.ctrl_handler = hdl;
2556
2557 if (dev->is_webcam)
2558 v4l2->progressive = true;
2559
2560 /*
2561 * Default format, used for tvp5150 or saa711x output formats
2562 */
2563 v4l2->vinmode = EM28XX_VINMODE_YUV422_CbYCrY;
2564 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED |
2565 EM28XX_VINCTRL_CCIR656_ENABLE;
2566
2567 /* request some modules */
2568
2569 if (dev->has_msp34xx)
2570 v4l2_i2c_new_subdev(v4l2_dev: &v4l2->v4l2_dev,
2571 adapter: &dev->i2c_adap[dev->def_i2c_bus],
2572 client_type: "msp3400", addr: 0, probe_addrs: msp3400_addrs);
2573
2574 if (dev->board.decoder == EM28XX_SAA711X)
2575 v4l2_i2c_new_subdev(v4l2_dev: &v4l2->v4l2_dev,
2576 adapter: &dev->i2c_adap[dev->def_i2c_bus],
2577 client_type: "saa7115_auto", addr: 0, probe_addrs: saa711x_addrs);
2578
2579 if (dev->board.decoder == EM28XX_TVP5150)
2580 v4l2_i2c_new_subdev(v4l2_dev: &v4l2->v4l2_dev,
2581 adapter: &dev->i2c_adap[dev->def_i2c_bus],
2582 client_type: "tvp5150", addr: 0, probe_addrs: tvp5150_addrs);
2583
2584 if (dev->board.adecoder == EM28XX_TVAUDIO)
2585 v4l2_i2c_new_subdev(v4l2_dev: &v4l2->v4l2_dev,
2586 adapter: &dev->i2c_adap[dev->def_i2c_bus],
2587 client_type: "tvaudio", addr: dev->board.tvaudio_addr, NULL);
2588
2589 /* Initialize tuner and camera */
2590
2591 if (dev->board.tuner_type != TUNER_ABSENT) {
2592 unsigned short tuner_addr = dev->board.tuner_addr;
2593 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT);
2594
2595 if (dev->board.radio.type)
2596 v4l2_i2c_new_subdev(v4l2_dev: &v4l2->v4l2_dev,
2597 adapter: &dev->i2c_adap[dev->def_i2c_bus],
2598 client_type: "tuner", addr: dev->board.radio_addr,
2599 NULL);
2600
2601 if (has_demod)
2602 v4l2_i2c_new_subdev(v4l2_dev: &v4l2->v4l2_dev,
2603 adapter: &dev->i2c_adap[dev->def_i2c_bus],
2604 client_type: "tuner", addr: 0,
2605 probe_addrs: v4l2_i2c_tuner_addrs(type: ADDRS_DEMOD));
2606 if (tuner_addr == 0) {
2607 enum v4l2_i2c_tuner_type type =
2608 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV;
2609 struct v4l2_subdev *sd;
2610
2611 sd = v4l2_i2c_new_subdev(v4l2_dev: &v4l2->v4l2_dev,
2612 adapter: &dev->i2c_adap[dev->def_i2c_bus],
2613 client_type: "tuner", addr: 0,
2614 probe_addrs: v4l2_i2c_tuner_addrs(type));
2615
2616 if (sd)
2617 tuner_addr = v4l2_i2c_subdev_addr(sd);
2618 } else {
2619 v4l2_i2c_new_subdev(v4l2_dev: &v4l2->v4l2_dev,
2620 adapter: &dev->i2c_adap[dev->def_i2c_bus],
2621 client_type: "tuner", addr: tuner_addr, NULL);
2622 }
2623
2624 em28xx_tuner_setup(dev, tuner_addr);
2625 }
2626
2627 if (dev->em28xx_sensor != EM28XX_NOSENSOR)
2628 em28xx_init_camera(dev);
2629
2630 /* Configure audio */
2631 ret = em28xx_audio_setup(dev);
2632 if (ret < 0) {
2633 dev_err(&dev->intf->dev,
2634 "%s: Error while setting audio - error [%d]!\n",
2635 __func__, ret);
2636 goto unregister_dev;
2637 }
2638 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
2639 v4l2_ctrl_new_std(hdl, ops: &em28xx_ctrl_ops,
2640 V4L2_CID_AUDIO_MUTE, min: 0, max: 1, step: 1, def: 1);
2641 v4l2_ctrl_new_std(hdl, ops: &em28xx_ctrl_ops,
2642 V4L2_CID_AUDIO_VOLUME, min: 0, max: 0x1f, step: 1, def: 0x1f);
2643 } else {
2644 /* install the em28xx notify callback */
2645 v4l2_ctrl_notify(ctrl: v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE),
2646 notify: em28xx_ctrl_notify, priv: dev);
2647 v4l2_ctrl_notify(ctrl: v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME),
2648 notify: em28xx_ctrl_notify, priv: dev);
2649 }
2650
2651 /* wake i2c devices */
2652 em28xx_wake_i2c(dev);
2653
2654 /* init video dma queues */
2655 INIT_LIST_HEAD(list: &dev->vidq.active);
2656 INIT_LIST_HEAD(list: &dev->vbiq.active);
2657
2658 if (dev->has_msp34xx) {
2659 /* Send a reset to other chips via gpio */
2660 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, val: 0xf7);
2661 if (ret < 0) {
2662 dev_err(&dev->intf->dev,
2663 "%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n",
2664 __func__, ret);
2665 goto unregister_dev;
2666 }
2667 usleep_range(min: 10000, max: 11000);
2668
2669 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, val: 0xff);
2670 if (ret < 0) {
2671 dev_err(&dev->intf->dev,
2672 "%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n",
2673 __func__, ret);
2674 goto unregister_dev;
2675 }
2676 usleep_range(min: 10000, max: 11000);
2677 }
2678
2679 /* set default norm */
2680 v4l2->norm = V4L2_STD_PAL;
2681 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
2682 v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT;
2683
2684 /* Analog specific initialization */
2685 v4l2->format = &format[0];
2686
2687 maxw = norm_maxw(dev);
2688 /*
2689 * MaxPacketSize for em2800 is too small to capture at full resolution
2690 * use half of maxw as the scaler can only scale to 50%
2691 */
2692 if (dev->board.is_em2800)
2693 maxw /= 2;
2694
2695 em28xx_set_video_format(dev, fourcc: format[0].fourcc,
2696 width: maxw, height: norm_maxh(dev));
2697
2698 video_mux(dev, index: 0);
2699
2700 /* Audio defaults */
2701 dev->mute = 1;
2702 dev->volume = 0x1f;
2703
2704/* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2705 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2706 em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2707 val: (EM28XX_XCLK_AUDIO_UNMUTE | val));
2708
2709 em28xx_set_outfmt(dev);
2710
2711 /* Add image controls */
2712
2713 /*
2714 * NOTE: at this point, the subdevices are already registered, so
2715 * bridge controls are only added/enabled when no subdevice provides
2716 * them
2717 */
2718 if (!v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST))
2719 v4l2_ctrl_new_std(hdl, ops: &em28xx_ctrl_ops,
2720 V4L2_CID_CONTRAST,
2721 min: 0, max: 0x1f, step: 1, CONTRAST_DEFAULT);
2722 if (!v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS))
2723 v4l2_ctrl_new_std(hdl, ops: &em28xx_ctrl_ops,
2724 V4L2_CID_BRIGHTNESS,
2725 min: -0x80, max: 0x7f, step: 1, BRIGHTNESS_DEFAULT);
2726 if (!v4l2_ctrl_find(hdl, V4L2_CID_SATURATION))
2727 v4l2_ctrl_new_std(hdl, ops: &em28xx_ctrl_ops,
2728 V4L2_CID_SATURATION,
2729 min: 0, max: 0x1f, step: 1, SATURATION_DEFAULT);
2730 if (!v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE))
2731 v4l2_ctrl_new_std(hdl, ops: &em28xx_ctrl_ops,
2732 V4L2_CID_BLUE_BALANCE,
2733 min: -0x30, max: 0x30, step: 1, BLUE_BALANCE_DEFAULT);
2734 if (!v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE))
2735 v4l2_ctrl_new_std(hdl, ops: &em28xx_ctrl_ops,
2736 V4L2_CID_RED_BALANCE,
2737 min: -0x30, max: 0x30, step: 1, RED_BALANCE_DEFAULT);
2738 if (!v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS))
2739 v4l2_ctrl_new_std(hdl, ops: &em28xx_ctrl_ops,
2740 V4L2_CID_SHARPNESS,
2741 min: 0, max: 0x0f, step: 1, SHARPNESS_DEFAULT);
2742
2743 /* Reset image controls */
2744 em28xx_colorlevels_set_default(dev);
2745 v4l2_ctrl_handler_setup(hdl);
2746 ret = hdl->error;
2747 if (ret)
2748 goto unregister_dev;
2749
2750 /* allocate and fill video video_device struct */
2751 em28xx_vdev_init(dev, vfd: &v4l2->vdev, template: &em28xx_video_template, type_name: "video");
2752 mutex_init(&v4l2->vb_queue_lock);
2753 mutex_init(&v4l2->vb_vbi_queue_lock);
2754 v4l2->vdev.queue = &v4l2->vb_vidq;
2755 v4l2->vdev.queue->lock = &v4l2->vb_queue_lock;
2756 v4l2->vdev.device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE |
2757 V4L2_CAP_STREAMING;
2758 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
2759 v4l2->vdev.device_caps |= V4L2_CAP_AUDIO;
2760 if (dev->tuner_type != TUNER_ABSENT)
2761 v4l2->vdev.device_caps |= V4L2_CAP_TUNER;
2762
2763
2764 /* disable inapplicable ioctls */
2765 if (dev->is_webcam) {
2766 v4l2_disable_ioctl(vdev: &v4l2->vdev, VIDIOC_QUERYSTD);
2767 v4l2_disable_ioctl(vdev: &v4l2->vdev, VIDIOC_G_STD);
2768 v4l2_disable_ioctl(vdev: &v4l2->vdev, VIDIOC_S_STD);
2769 } else {
2770 v4l2_disable_ioctl(vdev: &v4l2->vdev, VIDIOC_S_PARM);
2771 }
2772 if (dev->tuner_type == TUNER_ABSENT) {
2773 v4l2_disable_ioctl(vdev: &v4l2->vdev, VIDIOC_G_TUNER);
2774 v4l2_disable_ioctl(vdev: &v4l2->vdev, VIDIOC_S_TUNER);
2775 v4l2_disable_ioctl(vdev: &v4l2->vdev, VIDIOC_G_FREQUENCY);
2776 v4l2_disable_ioctl(vdev: &v4l2->vdev, VIDIOC_S_FREQUENCY);
2777 }
2778 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2779 v4l2_disable_ioctl(vdev: &v4l2->vdev, VIDIOC_G_AUDIO);
2780 v4l2_disable_ioctl(vdev: &v4l2->vdev, VIDIOC_S_AUDIO);
2781 }
2782
2783 /* register v4l2 video video_device */
2784 ret = video_register_device(vdev: &v4l2->vdev, type: VFL_TYPE_VIDEO,
2785 nr: video_nr[dev->devno]);
2786 if (ret) {
2787 dev_err(&dev->intf->dev,
2788 "unable to register video device (error=%i).\n", ret);
2789 goto unregister_dev;
2790 }
2791
2792 /* Allocate and fill vbi video_device struct */
2793 if (em28xx_vbi_supported(dev) == 1) {
2794 em28xx_vdev_init(dev, vfd: &v4l2->vbi_dev, template: &em28xx_video_template,
2795 type_name: "vbi");
2796
2797 v4l2->vbi_dev.queue = &v4l2->vb_vbiq;
2798 v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock;
2799 v4l2->vbi_dev.device_caps = V4L2_CAP_STREAMING |
2800 V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE;
2801 if (dev->tuner_type != TUNER_ABSENT)
2802 v4l2->vbi_dev.device_caps |= V4L2_CAP_TUNER;
2803
2804 /* disable inapplicable ioctls */
2805 v4l2_disable_ioctl(vdev: &v4l2->vbi_dev, VIDIOC_S_PARM);
2806 if (dev->tuner_type == TUNER_ABSENT) {
2807 v4l2_disable_ioctl(vdev: &v4l2->vbi_dev, VIDIOC_G_TUNER);
2808 v4l2_disable_ioctl(vdev: &v4l2->vbi_dev, VIDIOC_S_TUNER);
2809 v4l2_disable_ioctl(vdev: &v4l2->vbi_dev, VIDIOC_G_FREQUENCY);
2810 v4l2_disable_ioctl(vdev: &v4l2->vbi_dev, VIDIOC_S_FREQUENCY);
2811 }
2812 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2813 v4l2_disable_ioctl(vdev: &v4l2->vbi_dev, VIDIOC_G_AUDIO);
2814 v4l2_disable_ioctl(vdev: &v4l2->vbi_dev, VIDIOC_S_AUDIO);
2815 }
2816
2817 /* register v4l2 vbi video_device */
2818 ret = video_register_device(vdev: &v4l2->vbi_dev, type: VFL_TYPE_VBI,
2819 nr: vbi_nr[dev->devno]);
2820 if (ret < 0) {
2821 dev_err(&dev->intf->dev,
2822 "unable to register vbi device\n");
2823 goto unregister_dev;
2824 }
2825 }
2826
2827 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2828 em28xx_vdev_init(dev, vfd: &v4l2->radio_dev, template: &em28xx_radio_template,
2829 type_name: "radio");
2830 v4l2->radio_dev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;
2831 ret = video_register_device(vdev: &v4l2->radio_dev, type: VFL_TYPE_RADIO,
2832 nr: radio_nr[dev->devno]);
2833 if (ret < 0) {
2834 dev_err(&dev->intf->dev,
2835 "can't register radio device\n");
2836 goto unregister_dev;
2837 }
2838 dev_info(&dev->intf->dev,
2839 "Registered radio device as %s\n",
2840 video_device_node_name(&v4l2->radio_dev));
2841 }
2842
2843 /* Init entities at the Media Controller */
2844 em28xx_v4l2_create_entities(dev);
2845
2846#ifdef CONFIG_MEDIA_CONTROLLER
2847 ret = v4l2_mc_create_media_graph(mdev: dev->media_dev);
2848 if (ret) {
2849 dev_err(&dev->intf->dev,
2850 "failed to create media graph\n");
2851 em28xx_v4l2_media_release(dev);
2852 goto unregister_dev;
2853 }
2854#endif
2855
2856 dev_info(&dev->intf->dev,
2857 "V4L2 video device registered as %s\n",
2858 video_device_node_name(&v4l2->vdev));
2859
2860 if (video_is_registered(vdev: &v4l2->vbi_dev))
2861 dev_info(&dev->intf->dev,
2862 "V4L2 VBI device registered as %s\n",
2863 video_device_node_name(&v4l2->vbi_dev));
2864
2865 /* Save some power by putting tuner to sleep */
2866 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2867
2868 /* initialize videobuf2 stuff */
2869 em28xx_vb2_setup(dev);
2870
2871 dev_info(&dev->intf->dev,
2872 "V4L2 extension successfully initialized\n");
2873
2874 kref_get(kref: &dev->ref);
2875
2876 mutex_unlock(lock: &dev->lock);
2877 return 0;
2878
2879unregister_dev:
2880 if (video_is_registered(vdev: &v4l2->radio_dev)) {
2881 dev_info(&dev->intf->dev,
2882 "V4L2 device %s deregistered\n",
2883 video_device_node_name(&v4l2->radio_dev));
2884 video_unregister_device(vdev: &v4l2->radio_dev);
2885 }
2886 if (video_is_registered(vdev: &v4l2->vbi_dev)) {
2887 dev_info(&dev->intf->dev,
2888 "V4L2 device %s deregistered\n",
2889 video_device_node_name(&v4l2->vbi_dev));
2890 video_unregister_device(vdev: &v4l2->vbi_dev);
2891 }
2892 if (video_is_registered(vdev: &v4l2->vdev)) {
2893 dev_info(&dev->intf->dev,
2894 "V4L2 device %s deregistered\n",
2895 video_device_node_name(&v4l2->vdev));
2896 video_unregister_device(vdev: &v4l2->vdev);
2897 }
2898
2899 v4l2_ctrl_handler_free(hdl: &v4l2->ctrl_handler);
2900 v4l2_device_unregister(v4l2_dev: &v4l2->v4l2_dev);
2901err:
2902 dev->v4l2 = NULL;
2903 kref_put(kref: &v4l2->ref, release: em28xx_free_v4l2);
2904 mutex_unlock(lock: &dev->lock);
2905 return ret;
2906}
2907
2908static struct em28xx_ops v4l2_ops = {
2909 .id = EM28XX_V4L2,
2910 .name = "Em28xx v4l2 Extension",
2911 .init = em28xx_v4l2_init,
2912 .fini = em28xx_v4l2_fini,
2913 .suspend = em28xx_v4l2_suspend,
2914 .resume = em28xx_v4l2_resume,
2915};
2916
2917static int __init em28xx_video_register(void)
2918{
2919 return em28xx_register_extension(dev: &v4l2_ops);
2920}
2921
2922static void __exit em28xx_video_unregister(void)
2923{
2924 em28xx_unregister_extension(dev: &v4l2_ops);
2925}
2926
2927module_init(em28xx_video_register);
2928module_exit(em28xx_video_unregister);
2929

source code of linux/drivers/media/usb/em28xx/em28xx-video.c