1 // SPDX-License-Identifier: GPL-2.0+
3 // em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
4 // video capture devices
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>
12 // Some parts based on SN9C10x PC Camera Controllers GPL driver made
13 // by Luca Risolia <luca.risolia@studio.unibo.it>
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>
25 #include <linux/mutex.h>
26 #include <linux/slab.h>
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>
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>"
40 static unsigned int isoc_debug;
41 module_param(isoc_debug, int, 0644);
42 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
44 static unsigned int disable_vbi;
45 module_param(disable_vbi, int, 0644);
46 MODULE_PARM_DESC(disable_vbi, "disable vbi support");
49 module_param(alt, int, 0644);
50 MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");
52 #define em28xx_videodbg(fmt, arg...) do { \
54 dev_printk(KERN_DEBUG, &dev->intf->dev, \
55 "video: %s: " fmt, __func__, ## arg); \
58 #define em28xx_isocdbg(fmt, arg...) do {\
60 dev_printk(KERN_DEBUG, &dev->intf->dev, \
61 "isoc: %s: " fmt, __func__, ## arg); \
64 MODULE_AUTHOR(DRIVER_AUTHOR);
65 MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface");
66 MODULE_LICENSE("GPL v2");
67 MODULE_VERSION(EM28XX_VERSION);
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)
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 };
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");
88 static unsigned int video_debug;
89 module_param(video_debug, int, 0644);
90 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
92 /* supported video standards */
93 static struct em28xx_fmt format[] = {
95 .fourcc = V4L2_PIX_FMT_YUYV,
97 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V,
99 .fourcc = V4L2_PIX_FMT_RGB565,
101 .reg = EM28XX_OUTFMT_RGB_16_656,
103 .fourcc = V4L2_PIX_FMT_SRGGB8,
105 .reg = EM28XX_OUTFMT_RGB_8_RGRG,
107 .fourcc = V4L2_PIX_FMT_SBGGR8,
109 .reg = EM28XX_OUTFMT_RGB_8_BGBG,
111 .fourcc = V4L2_PIX_FMT_SGRBG8,
113 .reg = EM28XX_OUTFMT_RGB_8_GRGR,
115 .fourcc = V4L2_PIX_FMT_SGBRG8,
117 .reg = EM28XX_OUTFMT_RGB_8_GBGB,
119 .fourcc = V4L2_PIX_FMT_YUV411P,
121 .reg = EM28XX_OUTFMT_YUV411,
125 /*FIXME: maxw should be dependent of alt mode */
126 static inline unsigned int norm_maxw(struct em28xx *dev)
128 struct em28xx_v4l2 *v4l2 = dev->v4l2;
131 return v4l2->sensor_xres;
133 if (dev->board.max_range_640_480)
139 static inline unsigned int norm_maxh(struct em28xx *dev)
141 struct em28xx_v4l2 *v4l2 = dev->v4l2;
144 return v4l2->sensor_yres;
146 if (dev->board.max_range_640_480)
149 return (v4l2->norm & V4L2_STD_625_50) ? 576 : 480;
152 static int em28xx_vbi_supported(struct em28xx *dev)
154 /* Modprobe option to manually disable */
155 if (disable_vbi == 1)
161 /* FIXME: check subdevices for VBI support */
163 if (dev->chip_id == CHIP_ID_EM2860 ||
164 dev->chip_id == CHIP_ID_EM2883)
167 /* Version of em28xx that does not support VBI */
173 * configure i2c attached devices
175 static void em28xx_wake_i2c(struct em28xx *dev)
177 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
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);
184 static int em28xx_colorlevels_set_default(struct em28xx *dev)
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);
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);
202 static int em28xx_set_outfmt(struct em28xx *dev)
206 struct em28xx_v4l2 *v4l2 = dev->v4l2;
208 fmt = v4l2->format->reg;
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.
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.
220 ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt);
224 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, v4l2->vinmode);
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) {
237 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09);
238 } else if (v4l2->norm & V4L2_STD_625_50) {
240 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07);
244 return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl);
247 static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax,
250 em28xx_videodbg("em28xx Scale: (%d,%d)-(%d,%d)\n",
251 xmin, ymin, xmax, ymax);
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);
259 static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart,
260 u16 width, u16 height)
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 */
267 em28xx_videodbg("capture area set to (%d,%d): %dx%d\n",
269 ((overflow & 2) << 9 | cwidth << 2),
270 ((overflow & 1) << 10 | cheight << 2));
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);
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);
286 static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v)
289 /* the em2800 scaler only supports scaling down to 50% */
291 if (dev->board.is_em2800) {
292 mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00);
298 em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2);
302 em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2);
304 * it seems that both H and V scalers must be active
307 mode = (h || v) ? 0x30 : 0x00;
309 return em28xx_write_reg(dev, EM28XX_R26_COMPR, mode);
312 /* FIXME: this only function read values from dev */
313 static int em28xx_resolution_set(struct em28xx *dev)
315 struct em28xx_v4l2 *v4l2 = dev->v4l2;
316 int width = norm_maxw(dev);
317 int height = norm_maxh(dev);
319 /* Properly setup VBI */
320 v4l2->vbi_width = 720;
321 if (v4l2->norm & V4L2_STD_525_60)
322 v4l2->vbi_height = 12;
324 v4l2->vbi_height = 18;
326 em28xx_set_outfmt(dev);
328 em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2);
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
339 if (em28xx_vbi_supported(dev) == 1)
340 em28xx_capture_area_set(dev, 0, 2, width, height);
342 em28xx_capture_area_set(dev, 0, 0, width, height);
344 return em28xx_scaler_set(dev, v4l2->hscale, v4l2->vscale);
347 /* Set USB alternate setting for analog video */
348 static int em28xx_set_alternate(struct em28xx *dev)
350 struct em28xx_v4l2 *v4l2 = dev->v4l2;
351 struct usb_device *udev = interface_to_usbdev(dev->intf);
354 unsigned int min_pkt_size = v4l2->width * 2 + 4;
357 * NOTE: for isoc transfers, only alt settings > 0 are allowed
358 * bulk transfers seem to work only with alt=0 !
361 if (alt > 0 && alt < dev->num_alt) {
362 em28xx_videodbg("alternate forced to %d\n", dev->alt);
366 if (dev->analog_xfer_bulk)
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.
374 if (v4l2->width * 2 * v4l2->height > 720 * 240 * 2)
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) {
383 * otherwise make sure that we end up with the maximum
384 * bandwidth because the min_pkt_size equation might be wrong.
387 } else if (dev->alt_max_pkt_size_isoc[i] >
388 dev->alt_max_pkt_size_isoc[dev->alt])
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 !
398 if (dev->analog_xfer_bulk) {
399 dev->max_pkt_size = 512; /* USB 2.0 spec */
400 dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER;
402 em28xx_videodbg("minimum isoc packet size: %u (alt=%d)\n",
403 min_pkt_size, dev->alt);
405 dev->alt_max_pkt_size_isoc[dev->alt];
406 dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS;
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);
412 dev_err(&dev->intf->dev,
413 "cannot change alternate number to %d (error=%i)\n",
421 * DMA and thread functions
425 * Finish the current buffer
427 static inline void finish_buffer(struct em28xx *dev,
428 struct em28xx_buffer *buf)
430 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
432 buf->vb.sequence = dev->v4l2->field_count++;
433 if (dev->v4l2->progressive)
434 buf->vb.field = V4L2_FIELD_NONE;
436 buf->vb.field = V4L2_FIELD_INTERLACED;
437 buf->vb.vb2_buf.timestamp = ktime_get_ns();
439 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
443 * Copy picture data from USB buffer to video buffer
445 static void em28xx_copy_video(struct em28xx *dev,
446 struct em28xx_buffer *buf,
447 unsigned char *usb_buf,
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;
455 if (buf->pos + len > buf->length)
456 len = buf->length - buf->pos;
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;
466 linesdone = buf->pos / bytesperline;
467 currlinedone = buf->pos % bytesperline;
469 if (v4l2->progressive)
470 offset = linesdone * bytesperline + currlinedone;
472 offset = linesdone * bytesperline * 2 + currlinedone;
474 startwrite = fieldstart + offset;
475 lencopy = bytesperline - currlinedone;
476 lencopy = lencopy > remain ? remain : lencopy;
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 -
488 memcpy(startwrite, startread, lencopy);
493 if (v4l2->progressive)
494 startwrite += lencopy;
496 startwrite += lencopy + bytesperline;
497 startread += lencopy;
498 if (bytesperline > remain)
501 lencopy = bytesperline;
503 if ((char *)startwrite + lencopy > (char *)buf->vb_buf +
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 -
515 memcpy(startwrite, startread, lencopy);
524 * Copy VBI data from USB buffer to video buffer
526 static void em28xx_copy_vbi(struct em28xx *dev,
527 struct em28xx_buffer *buf,
528 unsigned char *usb_buf,
533 if (buf->pos + len > buf->length)
534 len = buf->length - 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;
541 memcpy(buf->vb_buf + offset, usb_buf, len);
545 static inline void print_err_status(struct em28xx *dev,
546 int packet, int status)
548 char *errmsg = "Unknown";
552 errmsg = "unlinked synchronously";
555 errmsg = "unlinked asynchronously";
558 errmsg = "Buffer error (overrun)";
561 errmsg = "Stalled (device not responding)";
564 errmsg = "Babble (bad cable?)";
567 errmsg = "Bit-stuff error (bad cable?)";
570 errmsg = "CRC/Timeout (could be anything)";
573 errmsg = "Device does not respond";
577 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
579 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
580 packet, status, errmsg);
585 * get the next available buffer from dma queue
587 static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev,
588 struct em28xx_dmaqueue *dma_q)
590 struct em28xx_buffer *buf;
592 if (list_empty(&dma_q->active)) {
593 em28xx_isocdbg("No active queue to serve\n");
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);
602 buf->vb_buf = buf->mem;
608 * Finish the current buffer if completed and prepare for the next field
610 static struct em28xx_buffer *
611 finish_field_prepare_next(struct em28xx *dev,
612 struct em28xx_buffer *buf,
613 struct em28xx_dmaqueue *dma_q)
615 struct em28xx_v4l2 *v4l2 = dev->v4l2;
617 if (v4l2->progressive || v4l2->top_field) { /* Brand new frame */
619 finish_buffer(dev, buf);
620 buf = get_next_buf(dev, dma_q);
623 buf->top_field = v4l2->top_field;
631 * Process data packet according to the em2710/em2750/em28xx frame data format
633 static inline void process_frame_data_em28xx(struct em28xx *dev,
634 unsigned char *data_pkt,
635 unsigned int data_len)
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;
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
651 * NOTE: Headers are always 4 bytes and
652 * never split across packets
654 if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 &&
655 data_pkt[2] == 0x88 && data_pkt[3] == 0x88) {
659 } else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) {
660 /* Field start (VBI mode) */
661 v4l2->capture_type = 0;
663 em28xx_isocdbg("VBI START HEADER !!!\n");
664 v4l2->top_field = !(data_pkt[2] & 1);
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);
677 * NOTE: With bulk transfers, intermediate data packets
678 * have no continuation header
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;
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;
694 em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len);
695 v4l2->vbi_read += vbi_data_len;
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;
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;
711 if (v4l2->capture_type == 3 && buf && data_len > 0)
712 em28xx_copy_video(dev, buf, data_pkt, data_len);
716 * Process data packet according to the em25xx/em276x/7x/8x frame data format
718 static inline void process_frame_data_em25xx(struct em28xx *dev,
719 unsigned char *data_pkt,
720 unsigned int data_len)
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;
727 /* Check for header */
729 * NOTE: at least with bulk transfers, only the first packet
730 * has a header and has always set the FRAME_END bit
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;
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;
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
756 if (buf && data_len > 0)
757 em28xx_copy_video(dev, buf, data_pkt, data_len);
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;
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.
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.
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)
781 int xfer_bulk, num_packets, i;
782 unsigned char *usb_data_pkt;
783 unsigned int usb_data_len;
788 if (dev->disconnected)
792 print_err_status(dev, -1, urb->status);
794 xfer_bulk = usb_pipebulk(urb->pipe);
796 if (xfer_bulk) /* bulk */
799 num_packets = urb->number_of_packets;
801 for (i = 0; i < num_packets; i++) {
802 if (xfer_bulk) { /* bulk */
803 usb_data_len = urb->actual_length;
805 usb_data_pkt = urb->transfer_buffer;
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)
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");
820 usb_data_pkt = urb->transfer_buffer +
821 urb->iso_frame_desc[i].offset;
824 if (usb_data_len == 0) {
825 /* NOTE: happens very often with isoc transfers */
826 /* em28xx_usbdbg("packet %d is empty",i); - spammy */
831 process_frame_data_em25xx(dev,
832 usb_data_pkt, usb_data_len);
834 process_frame_data_em28xx(dev,
835 usb_data_pkt, usb_data_len);
840 static int get_resource(enum v4l2_buf_type 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;
849 return -1; /* Indicate that device is busy */
853 /* Usage lock check functions */
854 static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type)
856 int res_type = get_resource(f_type);
859 if (dev->resources & res_type) {
860 /* no, someone else uses it */
864 /* it's free, grab it */
865 dev->resources |= res_type;
866 em28xx_videodbg("res: get %d\n", res_type);
870 static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type)
872 int res_type = get_resource(f_type);
874 dev->resources &= ~res_type;
875 em28xx_videodbg("res: put %d\n", res_type);
878 static void em28xx_v4l2_media_release(struct em28xx *dev)
880 #ifdef CONFIG_MEDIA_CONTROLLER
883 for (i = 0; i < MAX_EM28XX_INPUT; i++) {
886 media_device_unregister_entity(&dev->input_ent[i]);
892 * Media Controller helper functions
895 static int em28xx_enable_analog_tuner(struct em28xx *dev)
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;
904 if (!mdev || !v4l2->decoder)
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.
914 list_for_each_entry(link, &v4l2->decoder->links, list) {
915 if (link->sink->entity == v4l2->decoder) {
917 if (link->flags & MEDIA_LNK_FL_ENABLED)
923 if (active_links == 1 || !found_link)
926 source = found_link->source->entity;
927 list_for_each_entry(link, &source->links, list) {
928 struct media_entity *sink;
931 sink = link->sink->entity;
933 if (sink == v4l2->decoder)
934 flags = MEDIA_LNK_FL_ENABLED;
936 ret = media_entity_setup_link(link, flags);
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",
946 em28xx_videodbg("link %s->%s was %s\n",
947 source->name, sink->name,
948 flags ? "ENABLED" : "disabled");
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",
961 static void em28xx_v4l2_create_entities(struct em28xx *dev)
963 #if defined(CONFIG_MEDIA_CONTROLLER)
964 struct em28xx_v4l2 *v4l2 = dev->v4l2;
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);
971 dev_err(&dev->intf->dev,
972 "failed to initialize video media entity!\n");
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,
979 dev_err(&dev->intf->dev,
980 "failed to initialize vbi media entity!\n");
983 /* Webcams don't have input connectors */
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];
994 ent->name = iname[INPUT(i)->type];
995 ent->flags = MEDIA_ENT_FL_CONNECTOR;
996 dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;
998 switch (INPUT(i)->type) {
999 case EM28XX_VMUX_COMPOSITE:
1000 ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
1002 case EM28XX_VMUX_SVIDEO:
1003 ent->function = MEDIA_ENT_F_CONN_SVIDEO;
1005 default: /* EM28XX_VMUX_TELEVISION or EM28XX_RADIO */
1006 if (dev->tuner_type != TUNER_ABSENT)
1007 ent->function = MEDIA_ENT_F_CONN_RF;
1011 ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
1013 dev_err(&dev->intf->dev,
1014 "failed to initialize input pad[%d]!\n", i);
1016 ret = media_device_register_entity(dev->media_dev, ent);
1018 dev_err(&dev->intf->dev,
1019 "failed to register input entity %d!\n", i);
1025 * Videobuf2 operations
1028 static int queue_setup(struct vb2_queue *vq,
1029 unsigned int *nbuffers, unsigned int *nplanes,
1030 unsigned int sizes[], struct device *alloc_devs[])
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;
1038 return sizes[0] < size ? -EINVAL : 0;
1042 em28xx_enable_analog_tuner(dev);
1048 buffer_prepare(struct vb2_buffer *vb)
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;
1055 em28xx_videodbg("%s, field=%d\n", __func__, vbuf->field);
1057 size = (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;
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);
1064 vb2_set_plane_payload(vb, 0, size);
1069 int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
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;
1077 em28xx_videodbg("%s\n", __func__);
1079 dev->v4l2->field_count = 0;
1082 * Make sure streaming is not already in progress for this type
1083 * of filehandle (e.g. video, vbi)
1085 rc = res_get(dev, vq->type);
1089 if (v4l2->streaming_users == 0) {
1090 /* First active streaming user, so allocate all the URBs */
1092 /* Allocate the USB bandwidth */
1093 em28xx_set_alternate(dev);
1096 * Needed, since GPIO might have disabled power of
1099 em28xx_wake_i2c(dev);
1101 v4l2->capture_type = -1;
1102 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE,
1103 dev->analog_xfer_bulk,
1106 dev->packet_multiplier,
1107 em28xx_urb_data_copy);
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)
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;
1124 f.type = V4L2_TUNER_ANALOG_TV;
1125 v4l2_device_call_all(&v4l2->v4l2_dev,
1126 0, tuner, s_frequency, &f);
1128 /* Enable video stream at TV decoder */
1129 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 1);
1132 v4l2->streaming_users++;
1137 static void em28xx_stop_streaming(struct vb2_queue *vq)
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;
1144 em28xx_videodbg("%s\n", __func__);
1146 res_free(dev, vq->type);
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);
1152 /* Last active user, so shutdown all the URBS */
1153 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
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;
1162 while (!list_empty(&vidq->active)) {
1163 struct em28xx_buffer *buf;
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);
1169 spin_unlock_irqrestore(&dev->slock, flags);
1172 void em28xx_stop_vbi_streaming(struct vb2_queue *vq)
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;
1179 em28xx_videodbg("%s\n", __func__);
1181 res_free(dev, vq->type);
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);
1187 /* Last active user, so shutdown all the URBS */
1188 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
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;
1197 while (!list_empty(&vbiq->active)) {
1198 struct em28xx_buffer *buf;
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);
1204 spin_unlock_irqrestore(&dev->slock, flags);
1208 buffer_queue(struct vb2_buffer *vb)
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;
1217 em28xx_videodbg("%s\n", __func__);
1218 buf->mem = vb2_plane_vaddr(vb, 0);
1219 buf->length = vb2_plane_size(vb, 0);
1221 spin_lock_irqsave(&dev->slock, flags);
1222 list_add_tail(&buf->list, &vidq->active);
1223 spin_unlock_irqrestore(&dev->slock, flags);
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 .wait_prepare = vb2_ops_wait_prepare,
1233 .wait_finish = vb2_ops_wait_finish,
1236 static int em28xx_vb2_setup(struct em28xx *dev)
1239 struct vb2_queue *q;
1240 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1242 /* Setup Videobuf2 for Video capture */
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;
1248 q->buf_struct_size = sizeof(struct em28xx_buffer);
1249 q->ops = &em28xx_video_qops;
1250 q->mem_ops = &vb2_vmalloc_memops;
1252 rc = vb2_queue_init(q);
1256 /* Setup Videobuf2 for VBI capture */
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;
1262 q->buf_struct_size = sizeof(struct em28xx_buffer);
1263 q->ops = &em28xx_vbi_qops;
1264 q->mem_ops = &vb2_vmalloc_memops;
1266 rc = vb2_queue_init(q);
1277 static void video_mux(struct em28xx *dev, int index)
1279 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
1281 dev->ctl_input = index;
1282 dev->ctl_ainput = INPUT(index)->amux;
1283 dev->ctl_aoutput = INPUT(index)->aout;
1285 if (!dev->ctl_aoutput)
1286 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1288 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
1289 INPUT(index)->vmux, 0, 0);
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);
1296 /* Note: this is msp3400 specific */
1297 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1299 MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
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);
1307 em28xx_audio_analog_set(dev);
1310 static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv)
1312 struct em28xx *dev = priv;
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.
1321 case V4L2_CID_AUDIO_MUTE:
1322 dev->mute = ctrl->val;
1323 em28xx_audio_analog_set(dev);
1325 case V4L2_CID_AUDIO_VOLUME:
1326 dev->volume = ctrl->val;
1327 em28xx_audio_analog_set(dev);
1332 static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl)
1334 struct em28xx_v4l2 *v4l2 =
1335 container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler);
1336 struct em28xx *dev = v4l2->dev;
1340 case V4L2_CID_AUDIO_MUTE:
1341 dev->mute = ctrl->val;
1342 ret = em28xx_audio_analog_set(dev);
1344 case V4L2_CID_AUDIO_VOLUME:
1345 dev->volume = ctrl->val;
1346 ret = em28xx_audio_analog_set(dev);
1348 case V4L2_CID_CONTRAST:
1349 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val);
1351 case V4L2_CID_BRIGHTNESS:
1352 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val);
1354 case V4L2_CID_SATURATION:
1355 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val);
1357 case V4L2_CID_BLUE_BALANCE:
1358 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val);
1360 case V4L2_CID_RED_BALANCE:
1361 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val);
1363 case V4L2_CID_SHARPNESS:
1364 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val);
1368 return (ret < 0) ? ret : 0;
1371 static const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
1372 .s_ctrl = em28xx_s_ctrl,
1375 static void size_to_scale(struct em28xx *dev,
1376 unsigned int width, unsigned int height,
1377 unsigned int *hscale, unsigned int *vscale)
1379 unsigned int maxw = norm_maxw(dev);
1380 unsigned int maxh = norm_maxh(dev);
1382 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1383 if (*hscale > EM28XX_HVSCALE_MAX)
1384 *hscale = EM28XX_HVSCALE_MAX;
1386 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1387 if (*vscale > EM28XX_HVSCALE_MAX)
1388 *vscale = EM28XX_HVSCALE_MAX;
1391 static void scale_to_size(struct em28xx *dev,
1392 unsigned int hscale, unsigned int vscale,
1393 unsigned int *width, unsigned int *height)
1395 unsigned int maxw = norm_maxw(dev);
1396 unsigned int maxh = norm_maxh(dev);
1398 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1399 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1401 /* Don't let width or height to be zero */
1409 * IOCTL vidioc handling
1412 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1413 struct v4l2_format *f)
1415 struct em28xx *dev = video_drvdata(file);
1416 struct em28xx_v4l2 *v4l2 = dev->v4l2;
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;
1425 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1426 if (v4l2->progressive)
1427 f->fmt.pix.field = V4L2_FIELD_NONE;
1429 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1430 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1434 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1438 for (i = 0; i < ARRAY_SIZE(format); i++)
1439 if (format[i].fourcc == fourcc)
1445 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1446 struct v4l2_format *f)
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;
1457 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1460 em28xx_videodbg("Fourcc format (%08x) invalid. Using default (%08x).\n",
1461 f->fmt.pix.pixelformat, fmt->fourcc);
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;
1469 * MaxPacketSize for em2800 is too small to capture at full
1470 * resolution use half of maxw as the scaler can only scale
1473 if (width == maxw && height == maxh)
1477 * width must even because of the YUYV format
1478 * height must be even because of interlacing
1480 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1483 /* Avoid division by zero at size_to_scale */
1489 size_to_scale(dev, width, height, &hscale, &vscale);
1490 scale_to_size(dev, hscale, vscale, &width, &height);
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;
1501 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1502 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1507 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1508 unsigned int width, unsigned int height)
1510 struct em28xx_fmt *fmt;
1511 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1513 fmt = format_by_fourcc(fourcc);
1518 v4l2->width = width;
1519 v4l2->height = height;
1521 /* set new image size */
1522 size_to_scale(dev, v4l2->width, v4l2->height,
1523 &v4l2->hscale, &v4l2->vscale);
1525 em28xx_resolution_set(dev);
1530 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1531 struct v4l2_format *f)
1533 struct em28xx *dev = video_drvdata(file);
1534 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1536 if (vb2_is_busy(&v4l2->vb_vidq))
1539 vidioc_try_fmt_vid_cap(file, priv, f);
1541 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1542 f->fmt.pix.width, f->fmt.pix.height);
1545 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1547 struct em28xx *dev = video_drvdata(file);
1549 *norm = dev->v4l2->norm;
1554 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
1556 struct em28xx *dev = video_drvdata(file);
1558 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm);
1563 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
1565 struct em28xx *dev = video_drvdata(file);
1566 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1567 struct v4l2_format f;
1569 if (norm == v4l2->norm)
1572 if (v4l2->streaming_users > 0)
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);
1582 /* set new image size */
1583 v4l2->width = f.fmt.pix.width;
1584 v4l2->height = f.fmt.pix.height;
1585 size_to_scale(dev, v4l2->width, v4l2->height,
1586 &v4l2->hscale, &v4l2->vscale);
1588 em28xx_resolution_set(dev);
1589 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
1594 static int vidioc_g_parm(struct file *file, void *priv,
1595 struct v4l2_streamparm *p)
1597 struct v4l2_subdev_frame_interval ival = { 0 };
1598 struct em28xx *dev = video_drvdata(file);
1599 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1602 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1603 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
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 video, g_frame_interval, &ival);
1612 p->parm.capture.timeperframe = ival.interval;
1614 v4l2_video_std_frame_period(v4l2->norm,
1615 &p->parm.capture.timeperframe);
1621 static int vidioc_s_parm(struct file *file, void *priv,
1622 struct v4l2_streamparm *p)
1624 struct em28xx *dev = video_drvdata(file);
1625 struct v4l2_subdev_frame_interval ival = {
1627 p->parm.capture.timeperframe
1631 if (!dev->is_webcam)
1634 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1635 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1638 memset(&p->parm, 0, sizeof(p->parm));
1639 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1640 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1641 rc = v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 0,
1642 video, s_frame_interval, &ival);
1644 p->parm.capture.timeperframe = ival.interval;
1648 static int vidioc_enum_input(struct file *file, void *priv,
1649 struct v4l2_input *i)
1651 struct em28xx *dev = video_drvdata(file);
1656 if (n >= MAX_EM28XX_INPUT)
1658 if (!INPUT(n)->type)
1661 i->type = V4L2_INPUT_TYPE_CAMERA;
1663 strscpy(i->name, iname[INPUT(n)->type], sizeof(i->name));
1665 if (INPUT(n)->type == EM28XX_VMUX_TELEVISION)
1666 i->type = V4L2_INPUT_TYPE_TUNER;
1668 i->std = dev->v4l2->vdev.tvnorms;
1669 /* webcams do not have the STD API */
1671 i->capabilities = 0;
1673 /* Dynamically generates an audioset bitmask */
1675 for (j = 0; j < MAX_EM28XX_INPUT; j++)
1676 if (dev->amux_map[j] != EM28XX_AMUX_UNUSED)
1677 i->audioset |= 1 << j;
1682 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1684 struct em28xx *dev = video_drvdata(file);
1686 *i = dev->ctl_input;
1691 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1693 struct em28xx *dev = video_drvdata(file);
1695 if (i >= MAX_EM28XX_INPUT)
1697 if (!INPUT(i)->type)
1704 static int em28xx_fill_audio_input(struct em28xx *dev,
1706 struct v4l2_audio *a,
1709 unsigned int idx = dev->amux_map[index];
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.
1718 if (dev->has_msp34xx && idx != EM28XX_AMUX_UNUSED)
1719 idx = EM28XX_AMUX_LINE_IN;
1722 case EM28XX_AMUX_VIDEO:
1723 strscpy(a->name, "Television", sizeof(a->name));
1725 case EM28XX_AMUX_LINE_IN:
1726 strscpy(a->name, "Line In", sizeof(a->name));
1728 case EM28XX_AMUX_VIDEO2:
1729 strscpy(a->name, "Television alt", sizeof(a->name));
1731 case EM28XX_AMUX_PHONE:
1732 strscpy(a->name, "Phone", sizeof(a->name));
1734 case EM28XX_AMUX_MIC:
1735 strscpy(a->name, "Mic", sizeof(a->name));
1737 case EM28XX_AMUX_CD:
1738 strscpy(a->name, "CD", sizeof(a->name));
1740 case EM28XX_AMUX_AUX:
1741 strscpy(a->name, "Aux", sizeof(a->name));
1743 case EM28XX_AMUX_PCM_OUT:
1744 strscpy(a->name, "PCM", sizeof(a->name));
1746 case EM28XX_AMUX_UNUSED:
1751 a->capability = V4L2_AUDCAP_STEREO;
1753 em28xx_videodbg("%s: audio input index %d is '%s'\n",
1754 s, a->index, a->name);
1759 static int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *a)
1761 struct em28xx *dev = video_drvdata(file);
1763 if (a->index >= MAX_EM28XX_INPUT)
1766 return em28xx_fill_audio_input(dev, __func__, a, a->index);
1769 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1771 struct em28xx *dev = video_drvdata(file);
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);
1778 /* Should never happen! */
1782 static int vidioc_s_audio(struct file *file, void *priv,
1783 const struct v4l2_audio *a)
1785 struct em28xx *dev = video_drvdata(file);
1788 if (a->index >= MAX_EM28XX_INPUT)
1791 idx = dev->amux_map[a->index];
1793 if (idx == EM28XX_AMUX_UNUSED)
1796 dev->ctl_ainput = idx;
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.
1805 for (i = 0; i < MAX_EM28XX_INPUT; i++)
1806 if (idx == dev->amux_map[i])
1808 if (i == MAX_EM28XX_INPUT)
1811 dev->ctl_aoutput = INPUT(i)->aout;
1813 if (!dev->ctl_aoutput)
1814 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1816 em28xx_videodbg("%s: set audio input to %d\n", __func__,
1822 static int vidioc_g_tuner(struct file *file, void *priv,
1823 struct v4l2_tuner *t)
1825 struct em28xx *dev = video_drvdata(file);
1830 strscpy(t->name, "Tuner", sizeof(t->name));
1832 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
1836 static int vidioc_s_tuner(struct file *file, void *priv,
1837 const struct v4l2_tuner *t)
1839 struct em28xx *dev = video_drvdata(file);
1844 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
1848 static int vidioc_g_frequency(struct file *file, void *priv,
1849 struct v4l2_frequency *f)
1851 struct em28xx *dev = video_drvdata(file);
1852 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1857 f->frequency = v4l2->frequency;
1861 static int vidioc_s_frequency(struct file *file, void *priv,
1862 const struct v4l2_frequency *f)
1864 struct v4l2_frequency new_freq = *f;
1865 struct em28xx *dev = video_drvdata(file);
1866 struct em28xx_v4l2 *v4l2 = dev->v4l2;
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;
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)
1882 struct em28xx *dev = video_drvdata(file);
1884 if (chip->match.addr > 1)
1886 if (chip->match.addr == 1)
1887 strscpy(chip->name, "ac97", sizeof(chip->name));
1890 dev->v4l2->v4l2_dev.name, sizeof(chip->name));
1894 static int em28xx_reg_len(int reg)
1897 case EM28XX_R40_AC97LSB:
1898 case EM28XX_R30_HSCALELOW:
1899 case EM28XX_R32_VSCALELOW:
1906 static int vidioc_g_register(struct file *file, void *priv,
1907 struct v4l2_dbg_register *reg)
1909 struct em28xx *dev = video_drvdata(file);
1912 if (reg->match.addr > 1)
1914 if (reg->match.addr) {
1915 ret = em28xx_read_ac97(dev, reg->reg);
1925 reg->size = em28xx_reg_len(reg->reg);
1926 if (reg->size == 1) {
1927 ret = em28xx_read_reg(dev, reg->reg);
1936 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1937 reg->reg, (char *)&val, 2);
1941 reg->val = le16_to_cpu(val);
1947 static int vidioc_s_register(struct file *file, void *priv,
1948 const struct v4l2_dbg_register *reg)
1950 struct em28xx *dev = video_drvdata(file);
1953 if (reg->match.addr > 1)
1955 if (reg->match.addr)
1956 return em28xx_write_ac97(dev, reg->reg, reg->val);
1959 buf = cpu_to_le16(reg->val);
1961 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1962 em28xx_reg_len(reg->reg));
1966 static int vidioc_querycap(struct file *file, void *priv,
1967 struct v4l2_capability *cap)
1969 struct em28xx *dev = video_drvdata(file);
1970 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1971 struct usb_device *udev = interface_to_usbdev(dev->intf);
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));
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;
1990 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1991 struct v4l2_fmtdesc *f)
1993 if (unlikely(f->index >= ARRAY_SIZE(format)))
1996 f->pixelformat = format[f->index].fourcc;
2001 static int vidioc_enum_framesizes(struct file *file, void *priv,
2002 struct v4l2_frmsizeenum *fsize)
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);
2009 fmt = format_by_fourcc(fsize->pixel_format);
2011 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
2012 fsize->pixel_format);
2016 if (dev->board.is_em2800) {
2017 if (fsize->index > 1)
2019 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
2020 fsize->discrete.width = maxw / (1 + fsize->index);
2021 fsize->discrete.height = maxh / (1 + fsize->index);
2025 if (fsize->index != 0)
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;
2043 /* RAW VBI ioctls */
2045 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
2046 struct v4l2_format *format)
2048 struct em28xx *dev = video_drvdata(file);
2049 struct em28xx_v4l2 *v4l2 = dev->v4l2;
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));
2060 /* Varies by video standard (NTSC, PAL, etc.) */
2061 if (v4l2->norm & V4L2_STD_525_60) {
2063 format->fmt.vbi.start[0] = 10;
2064 format->fmt.vbi.start[1] = 273;
2065 } else if (v4l2->norm & V4L2_STD_625_50) {
2067 format->fmt.vbi.start[0] = 6;
2068 format->fmt.vbi.start[1] = 318;
2075 * RADIO ESPECIFIC IOCTLS
2078 static int radio_g_tuner(struct file *file, void *priv,
2079 struct v4l2_tuner *t)
2081 struct em28xx *dev = video_drvdata(file);
2083 if (unlikely(t->index > 0))
2086 strscpy(t->name, "Radio", sizeof(t->name));
2088 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
2093 static int radio_s_tuner(struct file *file, void *priv,
2094 const struct v4l2_tuner *t)
2096 struct em28xx *dev = video_drvdata(file);
2101 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
2107 * em28xx_free_v4l2() - Free struct em28xx_v4l2
2109 * @ref: struct kref for struct em28xx_v4l2
2111 * Called when all users of struct em28xx_v4l2 are gone
2113 static void em28xx_free_v4l2(struct kref *ref)
2115 struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref);
2117 v4l2->dev->v4l2 = NULL;
2122 * em28xx_v4l2_open()
2123 * inits the device and starts isoc transfer
2125 static int em28xx_v4l2_open(struct file *filp)
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;
2133 switch (vdev->vfl_type) {
2134 case VFL_TYPE_VIDEO:
2135 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2138 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2140 case VFL_TYPE_RADIO:
2146 em28xx_videodbg("open dev=%s type=%s users=%d\n",
2147 video_device_node_name(vdev), v4l2_type_names[fh_type],
2150 if (mutex_lock_interruptible(&dev->lock))
2151 return -ERESTARTSYS;
2153 ret = v4l2_fh_open(filp);
2155 dev_err(&dev->intf->dev,
2156 "%s: v4l2_fh_open() returned error %d\n",
2158 mutex_unlock(&dev->lock);
2162 if (v4l2->users == 0) {
2163 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2165 if (vdev->vfl_type != VFL_TYPE_RADIO)
2166 em28xx_resolution_set(dev);
2169 * Needed, since GPIO might have disabled power
2170 * of some i2c devices
2172 em28xx_wake_i2c(dev);
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);
2180 kref_get(&dev->ref);
2181 kref_get(&v4l2->ref);
2184 mutex_unlock(&dev->lock);
2190 * em28xx_v4l2_fini()
2191 * unregisters the v4l2,i2c and usb devices
2192 * called when the device gets disconnected or at module unload
2194 static int em28xx_v4l2_fini(struct em28xx *dev)
2196 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2198 if (dev->is_audio_only) {
2199 /* Shouldn't initialize IR for this interface */
2203 if (!dev->has_video) {
2204 /* This device does not support the v4l2 extension */
2211 dev_info(&dev->intf->dev, "Closing video extension\n");
2213 mutex_lock(&dev->lock);
2215 v4l2_device_disconnect(&v4l2->v4l2_dev);
2217 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
2219 em28xx_v4l2_media_release(dev);
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);
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);
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);
2237 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2238 v4l2_device_unregister(&v4l2->v4l2_dev);
2240 kref_put(&v4l2->ref, em28xx_free_v4l2);
2242 mutex_unlock(&dev->lock);
2244 kref_put(&dev->ref, em28xx_free_device);
2249 static int em28xx_v4l2_suspend(struct em28xx *dev)
2251 if (dev->is_audio_only)
2254 if (!dev->has_video)
2257 dev_info(&dev->intf->dev, "Suspending video extension\n");
2258 em28xx_stop_urbs(dev);
2262 static int em28xx_v4l2_resume(struct em28xx *dev)
2264 if (dev->is_audio_only)
2267 if (!dev->has_video)
2270 dev_info(&dev->intf->dev, "Resuming video extension\n");
2271 /* what do we do here */
2276 * em28xx_v4l2_close()
2277 * stops streaming and deallocates all resources allocated by the v4l2
2280 static int em28xx_v4l2_close(struct file *filp)
2282 struct em28xx *dev = video_drvdata(filp);
2283 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2284 struct usb_device *udev = interface_to_usbdev(dev->intf);
2287 em28xx_videodbg("users=%d\n", v4l2->users);
2289 vb2_fop_release(filp);
2290 mutex_lock(&dev->lock);
2292 if (v4l2->users == 1) {
2293 /* No sense to try to write to the device */
2294 if (dev->disconnected)
2297 /* Save some power by putting tuner to sleep */
2298 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2300 /* do this before setting alternate! */
2301 em28xx_set_mode(dev, EM28XX_SUSPEND);
2303 /* set alternate 0 */
2305 em28xx_videodbg("setting alternate 0\n");
2306 err = usb_set_interface(udev, 0, 0);
2308 dev_err(&dev->intf->dev,
2309 "cannot change alternate number to 0 (error=%i)\n",
2316 kref_put(&v4l2->ref, em28xx_free_v4l2);
2317 mutex_unlock(&dev->lock);
2318 kref_put(&dev->ref, em28xx_free_device);
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,
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,
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,
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,
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,
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,
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,
2406 static struct video_device em28xx_radio_template = {
2407 .fops = &radio_fops,
2408 .ioctl_ops = &radio_ioctl_ops,
2409 .release = video_device_release_empty,
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 */
2418 static unsigned short tvp5150_addrs[] = {
2424 static unsigned short msp3400_addrs[] = {
2430 /******************************** usb interface ******************************/
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)
2438 vfd->v4l2_dev = &dev->v4l2->v4l2_dev;
2439 vfd->lock = &dev->lock;
2443 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2444 dev_name(&dev->intf->dev), type_name);
2446 video_set_drvdata(vfd, dev);
2449 static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr)
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;
2456 memset(&tun_setup, 0, sizeof(tun_setup));
2458 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
2459 tun_setup.tuner_callback = em28xx_tuner_callback;
2461 if (dev->board.radio.type) {
2462 tun_setup.type = dev->board.radio.type;
2463 tun_setup.addr = dev->board.radio_addr;
2465 v4l2_device_call_all(v4l2_dev,
2466 0, tuner, s_type_addr, &tun_setup);
2469 if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type) {
2470 tun_setup.type = dev->tuner_type;
2471 tun_setup.addr = tuner_addr;
2473 v4l2_device_call_all(v4l2_dev,
2474 0, tuner, s_type_addr, &tun_setup);
2477 if (dev->board.tda9887_conf) {
2478 struct v4l2_priv_tun_config tda9887_cfg;
2480 tda9887_cfg.tuner = TUNER_TDA9887;
2481 tda9887_cfg.priv = &dev->board.tda9887_conf;
2483 v4l2_device_call_all(v4l2_dev,
2484 0, tuner, s_config, &tda9887_cfg);
2487 if (dev->tuner_type == TUNER_XC2028) {
2488 struct v4l2_priv_tun_config xc2028_cfg;
2489 struct xc2028_ctrl ctl;
2491 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg));
2492 memset(&ctl, 0, sizeof(ctl));
2494 em28xx_setup_xc3028(dev, &ctl);
2496 xc2028_cfg.tuner = TUNER_XC2028;
2497 xc2028_cfg.priv = &ctl;
2499 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg);
2502 /* configure tuner */
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);
2510 static int em28xx_v4l2_init(struct em28xx *dev)
2515 struct v4l2_ctrl_handler *hdl;
2516 struct em28xx_v4l2 *v4l2;
2518 if (dev->is_audio_only) {
2519 /* Shouldn't initialize IR for this interface */
2523 if (!dev->has_video) {
2524 /* This device does not support the v4l2 extension */
2528 dev_info(&dev->intf->dev, "Registering V4L2 extension\n");
2530 mutex_lock(&dev->lock);
2532 v4l2 = kzalloc(sizeof(*v4l2), GFP_KERNEL);
2534 mutex_unlock(&dev->lock);
2537 kref_init(&v4l2->ref);
2541 #ifdef CONFIG_MEDIA_CONTROLLER
2542 v4l2->v4l2_dev.mdev = dev->media_dev;
2544 ret = v4l2_device_register(&dev->intf->dev, &v4l2->v4l2_dev);
2546 dev_err(&dev->intf->dev,
2547 "Call to v4l2_device_register() failed!\n");
2551 hdl = &v4l2->ctrl_handler;
2552 v4l2_ctrl_handler_init(hdl, 8);
2553 v4l2->v4l2_dev.ctrl_handler = hdl;
2556 v4l2->progressive = true;
2559 * Default format, used for tvp5150 or saa711x output formats
2561 v4l2->vinmode = EM28XX_VINMODE_YUV422_CbYCrY;
2562 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED |
2563 EM28XX_VINCTRL_CCIR656_ENABLE;
2565 /* request some modules */
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);
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);
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);
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);
2587 /* Initialize tuner and camera */
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);
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,
2600 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2601 &dev->i2c_adap[dev->def_i2c_bus],
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;
2609 sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2610 &dev->i2c_adap[dev->def_i2c_bus],
2612 v4l2_i2c_tuner_addrs(type));
2615 tuner_addr = v4l2_i2c_subdev_addr(sd);
2617 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2618 &dev->i2c_adap[dev->def_i2c_bus],
2619 "tuner", tuner_addr, NULL);
2622 em28xx_tuner_setup(dev, tuner_addr);
2625 if (dev->em28xx_sensor != EM28XX_NOSENSOR)
2626 em28xx_init_camera(dev);
2628 /* Configure audio */
2629 ret = em28xx_audio_setup(dev);
2631 dev_err(&dev->intf->dev,
2632 "%s: Error while setting audio - error [%d]!\n",
2634 goto unregister_dev;
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);
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);
2649 /* wake i2c devices */
2650 em28xx_wake_i2c(dev);
2652 /* init video dma queues */
2653 INIT_LIST_HEAD(&dev->vidq.active);
2654 INIT_LIST_HEAD(&dev->vbiq.active);
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);
2660 dev_err(&dev->intf->dev,
2661 "%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n",
2663 goto unregister_dev;
2665 usleep_range(10000, 11000);
2667 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff);
2669 dev_err(&dev->intf->dev,
2670 "%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n",
2672 goto unregister_dev;
2674 usleep_range(10000, 11000);
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;
2682 /* Analog specific initialization */
2683 v4l2->format = &format[0];
2685 maxw = norm_maxw(dev);
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%
2690 if (dev->board.is_em2800)
2693 em28xx_set_video_format(dev, format[0].fourcc,
2694 maxw, norm_maxh(dev));
2698 /* Audio defaults */
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));
2707 em28xx_set_outfmt(dev);
2709 /* Add image controls */
2712 * NOTE: at this point, the subdevices are already registered, so
2713 * bridge controls are only added/enabled when no subdevice provides
2716 if (!v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST))
2717 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
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,
2739 0, 0x0f, 1, SHARPNESS_DEFAULT);
2741 /* Reset image controls */
2742 em28xx_colorlevels_set_default(dev);
2743 v4l2_ctrl_handler_setup(hdl);
2746 goto unregister_dev;
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 |
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;
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);
2768 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM);
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);
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);
2781 /* register v4l2 video video_device */
2782 ret = video_register_device(&v4l2->vdev, VFL_TYPE_VIDEO,
2783 video_nr[dev->devno]);
2785 dev_err(&dev->intf->dev,
2786 "unable to register video device (error=%i).\n", ret);
2787 goto unregister_dev;
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,
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;
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);
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);
2815 /* register v4l2 vbi video_device */
2816 ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI,
2817 vbi_nr[dev->devno]);
2819 dev_err(&dev->intf->dev,
2820 "unable to register vbi device\n");
2821 goto unregister_dev;
2825 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2826 em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template,
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]);
2832 dev_err(&dev->intf->dev,
2833 "can't register radio device\n");
2834 goto unregister_dev;
2836 dev_info(&dev->intf->dev,
2837 "Registered radio device as %s\n",
2838 video_device_node_name(&v4l2->radio_dev));
2841 /* Init entities at the Media Controller */
2842 em28xx_v4l2_create_entities(dev);
2844 #ifdef CONFIG_MEDIA_CONTROLLER
2845 ret = v4l2_mc_create_media_graph(dev->media_dev);
2847 dev_err(&dev->intf->dev,
2848 "failed to create media graph\n");
2849 em28xx_v4l2_media_release(dev);
2850 goto unregister_dev;
2854 dev_info(&dev->intf->dev,
2855 "V4L2 video device registered as %s\n",
2856 video_device_node_name(&v4l2->vdev));
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));
2863 /* Save some power by putting tuner to sleep */
2864 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2866 /* initialize videobuf2 stuff */
2867 em28xx_vb2_setup(dev);
2869 dev_info(&dev->intf->dev,
2870 "V4L2 extension successfully initialized\n");
2872 kref_get(&dev->ref);
2874 mutex_unlock(&dev->lock);
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);
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);
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);
2897 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2898 v4l2_device_unregister(&v4l2->v4l2_dev);
2901 kref_put(&v4l2->ref, em28xx_free_v4l2);
2902 mutex_unlock(&dev->lock);
2906 static struct em28xx_ops v4l2_ops = {
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,
2915 static int __init em28xx_video_register(void)
2917 return em28xx_register_extension(&v4l2_ops);
2920 static void __exit em28xx_video_unregister(void)
2922 em28xx_unregister_extension(&v4l2_ops);
2925 module_init(em28xx_video_register);
2926 module_exit(em28xx_video_unregister);