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>
15 // This program is free software; you can redistribute it and/or modify
16 // it under the terms of the GNU General Public License as published by
17 // the Free Software Foundation; either version 2 of the License, or
18 // (at your option) any later version.
20 // This program is distributed in the hope that it will be useful,
21 // but WITHOUT ANY WARRANTY; without even the implied warranty of
22 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 // GNU General Public License for more details.
27 #include <linux/init.h>
28 #include <linux/list.h>
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/bitmap.h>
32 #include <linux/usb.h>
33 #include <linux/i2c.h>
35 #include <linux/mutex.h>
36 #include <linux/slab.h>
38 #include "em28xx-v4l.h"
39 #include <media/v4l2-common.h>
40 #include <media/v4l2-ioctl.h>
41 #include <media/v4l2-event.h>
42 #include <media/drv-intf/msp3400.h>
43 #include <media/tuner.h>
45 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
46 "Markus Rechberger <mrechberger@gmail.com>, " \
47 "Mauro Carvalho Chehab <mchehab@kernel.org>, " \
48 "Sascha Sommer <saschasommer@freenet.de>"
50 static unsigned int isoc_debug;
51 module_param(isoc_debug, int, 0644);
52 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
54 static unsigned int disable_vbi;
55 module_param(disable_vbi, int, 0644);
56 MODULE_PARM_DESC(disable_vbi, "disable vbi support");
59 module_param(alt, int, 0644);
60 MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");
62 #define em28xx_videodbg(fmt, arg...) do { \
64 dev_printk(KERN_DEBUG, &dev->intf->dev, \
65 "video: %s: " fmt, __func__, ## arg); \
68 #define em28xx_isocdbg(fmt, arg...) do {\
70 dev_printk(KERN_DEBUG, &dev->intf->dev, \
71 "isoc: %s: " fmt, __func__, ## arg); \
74 MODULE_AUTHOR(DRIVER_AUTHOR);
75 MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface");
76 MODULE_LICENSE("GPL v2");
77 MODULE_VERSION(EM28XX_VERSION);
79 #define EM25XX_FRMDATAHDR_BYTE1 0x02
80 #define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE 0x20
81 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_END 0x02
82 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID 0x01
83 #define EM25XX_FRMDATAHDR_BYTE2_MASK (EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \
84 EM25XX_FRMDATAHDR_BYTE2_FRAME_END | \
85 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID)
87 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
88 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
89 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
91 module_param_array(video_nr, int, NULL, 0444);
92 module_param_array(vbi_nr, int, NULL, 0444);
93 module_param_array(radio_nr, int, NULL, 0444);
94 MODULE_PARM_DESC(video_nr, "video device numbers");
95 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
96 MODULE_PARM_DESC(radio_nr, "radio device numbers");
98 static unsigned int video_debug;
99 module_param(video_debug, int, 0644);
100 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
102 /* supported video standards */
103 static struct em28xx_fmt format[] = {
105 .name = "16 bpp YUY2, 4:2:2, packed",
106 .fourcc = V4L2_PIX_FMT_YUYV,
108 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V,
110 .name = "16 bpp RGB 565, LE",
111 .fourcc = V4L2_PIX_FMT_RGB565,
113 .reg = EM28XX_OUTFMT_RGB_16_656,
115 .name = "8 bpp Bayer RGRG..GBGB",
116 .fourcc = V4L2_PIX_FMT_SRGGB8,
118 .reg = EM28XX_OUTFMT_RGB_8_RGRG,
120 .name = "8 bpp Bayer BGBG..GRGR",
121 .fourcc = V4L2_PIX_FMT_SBGGR8,
123 .reg = EM28XX_OUTFMT_RGB_8_BGBG,
125 .name = "8 bpp Bayer GRGR..BGBG",
126 .fourcc = V4L2_PIX_FMT_SGRBG8,
128 .reg = EM28XX_OUTFMT_RGB_8_GRGR,
130 .name = "8 bpp Bayer GBGB..RGRG",
131 .fourcc = V4L2_PIX_FMT_SGBRG8,
133 .reg = EM28XX_OUTFMT_RGB_8_GBGB,
135 .name = "12 bpp YUV411",
136 .fourcc = V4L2_PIX_FMT_YUV411P,
138 .reg = EM28XX_OUTFMT_YUV411,
142 /*FIXME: maxw should be dependent of alt mode */
143 static inline unsigned int norm_maxw(struct em28xx *dev)
145 struct em28xx_v4l2 *v4l2 = dev->v4l2;
148 return v4l2->sensor_xres;
150 if (dev->board.max_range_640_480)
156 static inline unsigned int norm_maxh(struct em28xx *dev)
158 struct em28xx_v4l2 *v4l2 = dev->v4l2;
161 return v4l2->sensor_yres;
163 if (dev->board.max_range_640_480)
166 return (v4l2->norm & V4L2_STD_625_50) ? 576 : 480;
169 static int em28xx_vbi_supported(struct em28xx *dev)
171 /* Modprobe option to manually disable */
172 if (disable_vbi == 1)
178 /* FIXME: check subdevices for VBI support */
180 if (dev->chip_id == CHIP_ID_EM2860 ||
181 dev->chip_id == CHIP_ID_EM2883)
184 /* Version of em28xx that does not support VBI */
190 * configure i2c attached devices
192 static void em28xx_wake_i2c(struct em28xx *dev)
194 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
196 v4l2_device_call_all(v4l2_dev, 0, core, reset, 0);
197 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
198 INPUT(dev->ctl_input)->vmux, 0, 0);
201 static int em28xx_colorlevels_set_default(struct em28xx *dev)
203 em28xx_write_reg(dev, EM28XX_R20_YGAIN, CONTRAST_DEFAULT);
204 em28xx_write_reg(dev, EM28XX_R21_YOFFSET, BRIGHTNESS_DEFAULT);
205 em28xx_write_reg(dev, EM28XX_R22_UVGAIN, SATURATION_DEFAULT);
206 em28xx_write_reg(dev, EM28XX_R23_UOFFSET, BLUE_BALANCE_DEFAULT);
207 em28xx_write_reg(dev, EM28XX_R24_VOFFSET, RED_BALANCE_DEFAULT);
208 em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, SHARPNESS_DEFAULT);
210 em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20);
211 em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20);
212 em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20);
213 em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20);
214 em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00);
215 em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00);
216 return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00);
219 static int em28xx_set_outfmt(struct em28xx *dev)
223 struct em28xx_v4l2 *v4l2 = dev->v4l2;
225 fmt = v4l2->format->reg;
229 * NOTE: it's not clear if this is really needed !
230 * The datasheets say bit 5 is a reserved bit and devices seem to work
231 * fine without it. But the Windows driver sets it for em2710/50+em28xx
232 * devices and we've always been setting it, too.
234 * em2765 (em25xx, em276x/7x/8x) devices do NOT work with this bit set,
235 * it's likely used for an additional (compressed ?) format there.
237 ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt);
241 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, v4l2->vinmode);
245 vinctrl = v4l2->vinctl;
246 if (em28xx_vbi_supported(dev) == 1) {
247 vinctrl |= EM28XX_VINCTRL_VBI_RAW;
248 em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00);
249 em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH,
250 v4l2->vbi_width / 4);
251 em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, v4l2->vbi_height);
252 if (v4l2->norm & V4L2_STD_525_60) {
254 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09);
255 } else if (v4l2->norm & V4L2_STD_625_50) {
257 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07);
261 return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl);
264 static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax,
267 em28xx_videodbg("em28xx Scale: (%d,%d)-(%d,%d)\n",
268 xmin, ymin, xmax, ymax);
270 em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1);
271 em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1);
272 em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1);
273 return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1);
276 static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart,
277 u16 width, u16 height)
279 u8 cwidth = width >> 2;
280 u8 cheight = height >> 2;
281 u8 overflow = (height >> 9 & 0x02) | (width >> 10 & 0x01);
282 /* NOTE: size limit: 2047x1023 = 2MPix */
284 em28xx_videodbg("capture area set to (%d,%d): %dx%d\n",
286 ((overflow & 2) << 9 | cwidth << 2),
287 ((overflow & 1) << 10 | cheight << 2));
289 em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1);
290 em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1);
291 em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1);
292 em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1);
293 em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1);
295 /* FIXME: function/meaning of these registers ? */
296 /* FIXME: align width+height to multiples of 4 ?! */
297 if (dev->is_em25xx) {
298 em28xx_write_reg(dev, 0x34, width >> 4);
299 em28xx_write_reg(dev, 0x35, height >> 4);
303 static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v)
306 /* the em2800 scaler only supports scaling down to 50% */
308 if (dev->board.is_em2800) {
309 mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00);
315 em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2);
319 em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2);
321 * it seems that both H and V scalers must be active
324 mode = (h || v) ? 0x30 : 0x00;
326 return em28xx_write_reg(dev, EM28XX_R26_COMPR, mode);
329 /* FIXME: this only function read values from dev */
330 static int em28xx_resolution_set(struct em28xx *dev)
332 struct em28xx_v4l2 *v4l2 = dev->v4l2;
333 int width = norm_maxw(dev);
334 int height = norm_maxh(dev);
336 /* Properly setup VBI */
337 v4l2->vbi_width = 720;
338 if (v4l2->norm & V4L2_STD_525_60)
339 v4l2->vbi_height = 12;
341 v4l2->vbi_height = 18;
343 em28xx_set_outfmt(dev);
345 em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2);
348 * If we don't set the start position to 2 in VBI mode, we end up
349 * with line 20/21 being YUYV encoded instead of being in 8-bit
350 * greyscale. The core of the issue is that line 21 (and line 23 for
351 * PAL WSS) are inside of active video region, and as a result they
352 * get the pixelformatting associated with that area. So by cropping
353 * it out, we end up with the same format as the rest of the VBI
356 if (em28xx_vbi_supported(dev) == 1)
357 em28xx_capture_area_set(dev, 0, 2, width, height);
359 em28xx_capture_area_set(dev, 0, 0, width, height);
361 return em28xx_scaler_set(dev, v4l2->hscale, v4l2->vscale);
364 /* Set USB alternate setting for analog video */
365 static int em28xx_set_alternate(struct em28xx *dev)
367 struct em28xx_v4l2 *v4l2 = dev->v4l2;
368 struct usb_device *udev = interface_to_usbdev(dev->intf);
371 unsigned int min_pkt_size = v4l2->width * 2 + 4;
374 * NOTE: for isoc transfers, only alt settings > 0 are allowed
375 * bulk transfers seem to work only with alt=0 !
378 if (alt > 0 && alt < dev->num_alt) {
379 em28xx_videodbg("alternate forced to %d\n", dev->alt);
383 if (dev->analog_xfer_bulk)
387 * When image size is bigger than a certain value,
388 * the frame size should be increased, otherwise, only
389 * green screen will be received.
391 if (v4l2->width * 2 * v4l2->height > 720 * 240 * 2)
394 for (i = 0; i < dev->num_alt; i++) {
395 /* stop when the selected alt setting offers enough bandwidth */
396 if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) {
400 * otherwise make sure that we end up with the maximum
401 * bandwidth because the min_pkt_size equation might be wrong.
404 } else if (dev->alt_max_pkt_size_isoc[i] >
405 dev->alt_max_pkt_size_isoc[dev->alt])
411 * NOTE: for bulk transfers, we need to call usb_set_interface()
412 * even if the previous settings were the same. Otherwise streaming
413 * fails with all urbs having status = -EOVERFLOW !
415 if (dev->analog_xfer_bulk) {
416 dev->max_pkt_size = 512; /* USB 2.0 spec */
417 dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER;
419 em28xx_videodbg("minimum isoc packet size: %u (alt=%d)\n",
420 min_pkt_size, dev->alt);
422 dev->alt_max_pkt_size_isoc[dev->alt];
423 dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS;
425 em28xx_videodbg("setting alternate %d with wMaxPacketSize=%u\n",
426 dev->alt, dev->max_pkt_size);
427 err = usb_set_interface(udev, dev->ifnum, dev->alt);
429 dev_err(&dev->intf->dev,
430 "cannot change alternate number to %d (error=%i)\n",
438 * DMA and thread functions
442 * Finish the current buffer
444 static inline void finish_buffer(struct em28xx *dev,
445 struct em28xx_buffer *buf)
447 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
449 buf->vb.sequence = dev->v4l2->field_count++;
450 if (dev->v4l2->progressive)
451 buf->vb.field = V4L2_FIELD_NONE;
453 buf->vb.field = V4L2_FIELD_INTERLACED;
454 buf->vb.vb2_buf.timestamp = ktime_get_ns();
456 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
460 * Copy picture data from USB buffer to videobuf buffer
462 static void em28xx_copy_video(struct em28xx *dev,
463 struct em28xx_buffer *buf,
464 unsigned char *usb_buf,
467 struct em28xx_v4l2 *v4l2 = dev->v4l2;
468 void *fieldstart, *startwrite, *startread;
469 int linesdone, currlinedone, offset, lencopy, remain;
470 int bytesperline = v4l2->width << 1;
472 if (buf->pos + len > buf->length)
473 len = buf->length - buf->pos;
478 if (v4l2->progressive || buf->top_field)
479 fieldstart = buf->vb_buf;
480 else /* interlaced mode, even nr. of lines */
481 fieldstart = buf->vb_buf + bytesperline;
483 linesdone = buf->pos / bytesperline;
484 currlinedone = buf->pos % bytesperline;
486 if (v4l2->progressive)
487 offset = linesdone * bytesperline + currlinedone;
489 offset = linesdone * bytesperline * 2 + currlinedone;
491 startwrite = fieldstart + offset;
492 lencopy = bytesperline - currlinedone;
493 lencopy = lencopy > remain ? remain : lencopy;
495 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) {
496 em28xx_isocdbg("Overflow of %zu bytes past buffer end (1)\n",
497 ((char *)startwrite + lencopy) -
498 ((char *)buf->vb_buf + buf->length));
499 remain = (char *)buf->vb_buf + buf->length -
505 memcpy(startwrite, startread, lencopy);
510 if (v4l2->progressive)
511 startwrite += lencopy;
513 startwrite += lencopy + bytesperline;
514 startread += lencopy;
515 if (bytesperline > remain)
518 lencopy = bytesperline;
520 if ((char *)startwrite + lencopy > (char *)buf->vb_buf +
522 em28xx_isocdbg("Overflow of %zu bytes past buffer end(2)\n",
523 ((char *)startwrite + lencopy) -
524 ((char *)buf->vb_buf + buf->length));
525 remain = (char *)buf->vb_buf + buf->length -
532 memcpy(startwrite, startread, lencopy);
541 * Copy VBI data from USB buffer to videobuf buffer
543 static void em28xx_copy_vbi(struct em28xx *dev,
544 struct em28xx_buffer *buf,
545 unsigned char *usb_buf,
550 if (buf->pos + len > buf->length)
551 len = buf->length - buf->pos;
554 /* Make sure the bottom field populates the second half of the frame */
555 if (buf->top_field == 0)
556 offset += dev->v4l2->vbi_width * dev->v4l2->vbi_height;
558 memcpy(buf->vb_buf + offset, usb_buf, len);
562 static inline void print_err_status(struct em28xx *dev,
563 int packet, int status)
565 char *errmsg = "Unknown";
569 errmsg = "unlinked synchronously";
572 errmsg = "unlinked asynchronously";
575 errmsg = "Buffer error (overrun)";
578 errmsg = "Stalled (device not responding)";
581 errmsg = "Babble (bad cable?)";
584 errmsg = "Bit-stuff error (bad cable?)";
587 errmsg = "CRC/Timeout (could be anything)";
590 errmsg = "Device does not respond";
594 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
596 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
597 packet, status, errmsg);
602 * get the next available buffer from dma queue
604 static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev,
605 struct em28xx_dmaqueue *dma_q)
607 struct em28xx_buffer *buf;
609 if (list_empty(&dma_q->active)) {
610 em28xx_isocdbg("No active queue to serve\n");
614 /* Get the next buffer */
615 buf = list_entry(dma_q->active.next, struct em28xx_buffer, list);
616 /* Cleans up buffer - Useful for testing for frame/URB loss */
617 list_del(&buf->list);
619 buf->vb_buf = buf->mem;
625 * Finish the current buffer if completed and prepare for the next field
627 static struct em28xx_buffer *
628 finish_field_prepare_next(struct em28xx *dev,
629 struct em28xx_buffer *buf,
630 struct em28xx_dmaqueue *dma_q)
632 struct em28xx_v4l2 *v4l2 = dev->v4l2;
634 if (v4l2->progressive || v4l2->top_field) { /* Brand new frame */
636 finish_buffer(dev, buf);
637 buf = get_next_buf(dev, dma_q);
640 buf->top_field = v4l2->top_field;
648 * Process data packet according to the em2710/em2750/em28xx frame data format
650 static inline void process_frame_data_em28xx(struct em28xx *dev,
651 unsigned char *data_pkt,
652 unsigned int data_len)
654 struct em28xx_v4l2 *v4l2 = dev->v4l2;
655 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
656 struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf;
657 struct em28xx_dmaqueue *dma_q = &dev->vidq;
658 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
661 * capture type 0 = vbi start
662 * capture type 1 = vbi in progress
663 * capture type 2 = video start
664 * capture type 3 = video in progress
668 * NOTE: Headers are always 4 bytes and
669 * never split across packets
671 if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 &&
672 data_pkt[2] == 0x88 && data_pkt[3] == 0x88) {
676 } else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) {
677 /* Field start (VBI mode) */
678 v4l2->capture_type = 0;
680 em28xx_isocdbg("VBI START HEADER !!!\n");
681 v4l2->top_field = !(data_pkt[2] & 1);
684 } else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) {
685 /* Field start (VBI disabled) */
686 v4l2->capture_type = 2;
687 em28xx_isocdbg("VIDEO START HEADER !!!\n");
688 v4l2->top_field = !(data_pkt[2] & 1);
694 * NOTE: With bulk transfers, intermediate data packets
695 * have no continuation header
698 if (v4l2->capture_type == 0) {
699 vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q);
700 dev->usb_ctl.vbi_buf = vbi_buf;
701 v4l2->capture_type = 1;
704 if (v4l2->capture_type == 1) {
705 int vbi_size = v4l2->vbi_width * v4l2->vbi_height;
706 int vbi_data_len = ((v4l2->vbi_read + data_len) > vbi_size) ?
707 (vbi_size - v4l2->vbi_read) : data_len;
711 em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len);
712 v4l2->vbi_read += vbi_data_len;
714 if (vbi_data_len < data_len) {
715 /* Continue with copying video data */
716 v4l2->capture_type = 2;
717 data_pkt += vbi_data_len;
718 data_len -= vbi_data_len;
722 if (v4l2->capture_type == 2) {
723 buf = finish_field_prepare_next(dev, buf, dma_q);
724 dev->usb_ctl.vid_buf = buf;
725 v4l2->capture_type = 3;
728 if (v4l2->capture_type == 3 && buf && data_len > 0)
729 em28xx_copy_video(dev, buf, data_pkt, data_len);
733 * Process data packet according to the em25xx/em276x/7x/8x frame data format
735 static inline void process_frame_data_em25xx(struct em28xx *dev,
736 unsigned char *data_pkt,
737 unsigned int data_len)
739 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
740 struct em28xx_dmaqueue *dmaq = &dev->vidq;
741 struct em28xx_v4l2 *v4l2 = dev->v4l2;
742 bool frame_end = false;
744 /* Check for header */
746 * NOTE: at least with bulk transfers, only the first packet
747 * has a header and has always set the FRAME_END bit
749 if (data_len >= 2) { /* em25xx header is only 2 bytes long */
750 if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) &&
751 ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) {
752 v4l2->top_field = !(data_pkt[1] &
753 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID);
754 frame_end = data_pkt[1] &
755 EM25XX_FRMDATAHDR_BYTE2_FRAME_END;
760 /* Finish field and prepare next (BULK only) */
761 if (dev->analog_xfer_bulk && frame_end) {
762 buf = finish_field_prepare_next(dev, buf, dmaq);
763 dev->usb_ctl.vid_buf = buf;
766 * NOTE: in ISOC mode when a new frame starts and buf==NULL,
767 * we COULD already prepare a buffer here to avoid skipping the
773 if (buf && data_len > 0)
774 em28xx_copy_video(dev, buf, data_pkt, data_len);
776 /* Finish frame (ISOC only) => avoids lag of 1 frame */
777 if (!dev->analog_xfer_bulk && frame_end) {
778 buf = finish_field_prepare_next(dev, buf, dmaq);
779 dev->usb_ctl.vid_buf = buf;
785 * 1) Tested with USB bulk transfers only !
786 * The wording in the datasheet suggests that isoc might work different.
787 * The current code assumes that with isoc transfers each packet has a
788 * header like with the other em28xx devices.
790 * 2) Support for interlaced mode is pure theory. It has not been
791 * tested and it is unknown if these devices actually support it.
795 /* Processes and copies the URB data content (video and VBI data) */
796 static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb)
798 int xfer_bulk, num_packets, i;
799 unsigned char *usb_data_pkt;
800 unsigned int usb_data_len;
805 if (dev->disconnected)
809 print_err_status(dev, -1, urb->status);
811 xfer_bulk = usb_pipebulk(urb->pipe);
813 if (xfer_bulk) /* bulk */
816 num_packets = urb->number_of_packets;
818 for (i = 0; i < num_packets; i++) {
819 if (xfer_bulk) { /* bulk */
820 usb_data_len = urb->actual_length;
822 usb_data_pkt = urb->transfer_buffer;
824 if (urb->iso_frame_desc[i].status < 0) {
825 print_err_status(dev, i,
826 urb->iso_frame_desc[i].status);
827 if (urb->iso_frame_desc[i].status != -EPROTO)
831 usb_data_len = urb->iso_frame_desc[i].actual_length;
832 if (usb_data_len > dev->max_pkt_size) {
833 em28xx_isocdbg("packet bigger than packet size");
837 usb_data_pkt = urb->transfer_buffer +
838 urb->iso_frame_desc[i].offset;
841 if (usb_data_len == 0) {
842 /* NOTE: happens very often with isoc transfers */
843 /* em28xx_usbdbg("packet %d is empty",i); - spammy */
848 process_frame_data_em25xx(dev,
849 usb_data_pkt, usb_data_len);
851 process_frame_data_em28xx(dev,
852 usb_data_pkt, usb_data_len);
857 static int get_resource(enum v4l2_buf_type f_type)
860 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
861 return EM28XX_RESOURCE_VIDEO;
862 case V4L2_BUF_TYPE_VBI_CAPTURE:
863 return EM28XX_RESOURCE_VBI;
866 return -1; /* Indicate that device is busy */
870 /* Usage lock check functions */
871 static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type)
873 int res_type = get_resource(f_type);
876 if (dev->resources & res_type) {
877 /* no, someone else uses it */
881 /* it's free, grab it */
882 dev->resources |= res_type;
883 em28xx_videodbg("res: get %d\n", res_type);
887 static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type)
889 int res_type = get_resource(f_type);
891 dev->resources &= ~res_type;
892 em28xx_videodbg("res: put %d\n", res_type);
895 static void em28xx_v4l2_media_release(struct em28xx *dev)
897 #ifdef CONFIG_MEDIA_CONTROLLER
900 for (i = 0; i < MAX_EM28XX_INPUT; i++) {
903 media_device_unregister_entity(&dev->input_ent[i]);
909 * Media Controller helper functions
912 static int em28xx_enable_analog_tuner(struct em28xx *dev)
914 #ifdef CONFIG_MEDIA_CONTROLLER
915 struct media_device *mdev = dev->media_dev;
916 struct em28xx_v4l2 *v4l2 = dev->v4l2;
917 struct media_entity *source;
918 struct media_link *link, *found_link = NULL;
919 int ret, active_links = 0;
921 if (!mdev || !v4l2->decoder)
925 * This will find the tuner that is connected into the decoder.
926 * Technically, this is not 100% correct, as the device may be
927 * using an analog input instead of the tuner. However, as we can't
928 * do DVB streaming while the DMA engine is being used for V4L2,
929 * this should be enough for the actual needs.
931 list_for_each_entry(link, &v4l2->decoder->links, list) {
932 if (link->sink->entity == v4l2->decoder) {
934 if (link->flags & MEDIA_LNK_FL_ENABLED)
940 if (active_links == 1 || !found_link)
943 source = found_link->source->entity;
944 list_for_each_entry(link, &source->links, list) {
945 struct media_entity *sink;
948 sink = link->sink->entity;
950 if (sink == v4l2->decoder)
951 flags = MEDIA_LNK_FL_ENABLED;
953 ret = media_entity_setup_link(link, flags);
955 dev_err(&dev->intf->dev,
956 "Couldn't change link %s->%s to %s. Error %d\n",
957 source->name, sink->name,
958 flags ? "enabled" : "disabled",
963 em28xx_videodbg("link %s->%s was %s\n",
964 source->name, sink->name,
965 flags ? "ENABLED" : "disabled");
971 static const char * const iname[] = {
972 [EM28XX_VMUX_COMPOSITE] = "Composite",
973 [EM28XX_VMUX_SVIDEO] = "S-Video",
974 [EM28XX_VMUX_TELEVISION] = "Television",
975 [EM28XX_RADIO] = "Radio",
978 static void em28xx_v4l2_create_entities(struct em28xx *dev)
980 #if defined(CONFIG_MEDIA_CONTROLLER)
981 struct em28xx_v4l2 *v4l2 = dev->v4l2;
984 /* Initialize Video, VBI and Radio pads */
985 v4l2->video_pad.flags = MEDIA_PAD_FL_SINK;
986 ret = media_entity_pads_init(&v4l2->vdev.entity, 1, &v4l2->video_pad);
988 dev_err(&dev->intf->dev,
989 "failed to initialize video media entity!\n");
991 if (em28xx_vbi_supported(dev)) {
992 v4l2->vbi_pad.flags = MEDIA_PAD_FL_SINK;
993 ret = media_entity_pads_init(&v4l2->vbi_dev.entity, 1,
996 dev_err(&dev->intf->dev,
997 "failed to initialize vbi media entity!\n");
1000 /* Webcams don't have input connectors */
1004 /* Create entities for each input connector */
1005 for (i = 0; i < MAX_EM28XX_INPUT; i++) {
1006 struct media_entity *ent = &dev->input_ent[i];
1008 if (!INPUT(i)->type)
1011 ent->name = iname[INPUT(i)->type];
1012 ent->flags = MEDIA_ENT_FL_CONNECTOR;
1013 dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;
1015 switch (INPUT(i)->type) {
1016 case EM28XX_VMUX_COMPOSITE:
1017 ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
1019 case EM28XX_VMUX_SVIDEO:
1020 ent->function = MEDIA_ENT_F_CONN_SVIDEO;
1022 default: /* EM28XX_VMUX_TELEVISION or EM28XX_RADIO */
1023 if (dev->tuner_type != TUNER_ABSENT)
1024 ent->function = MEDIA_ENT_F_CONN_RF;
1028 ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
1030 dev_err(&dev->intf->dev,
1031 "failed to initialize input pad[%d]!\n", i);
1033 ret = media_device_register_entity(dev->media_dev, ent);
1035 dev_err(&dev->intf->dev,
1036 "failed to register input entity %d!\n", i);
1042 * Videobuf2 operations
1045 static int queue_setup(struct vb2_queue *vq,
1046 unsigned int *nbuffers, unsigned int *nplanes,
1047 unsigned int sizes[], struct device *alloc_devs[])
1049 struct em28xx *dev = vb2_get_drv_priv(vq);
1050 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1051 unsigned long size =
1052 (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;
1055 return sizes[0] < size ? -EINVAL : 0;
1059 em28xx_enable_analog_tuner(dev);
1065 buffer_prepare(struct vb2_buffer *vb)
1067 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1068 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
1069 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1072 em28xx_videodbg("%s, field=%d\n", __func__, vbuf->field);
1074 size = (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;
1076 if (vb2_plane_size(vb, 0) < size) {
1077 em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n",
1078 __func__, vb2_plane_size(vb, 0), size);
1081 vb2_set_plane_payload(vb, 0, size);
1086 int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
1088 struct em28xx *dev = vb2_get_drv_priv(vq);
1089 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1090 struct v4l2_frequency f;
1091 struct v4l2_fh *owner;
1094 em28xx_videodbg("%s\n", __func__);
1096 dev->v4l2->field_count = 0;
1099 * Make sure streaming is not already in progress for this type
1100 * of filehandle (e.g. video, vbi)
1102 rc = res_get(dev, vq->type);
1106 if (v4l2->streaming_users == 0) {
1107 /* First active streaming user, so allocate all the URBs */
1109 /* Allocate the USB bandwidth */
1110 em28xx_set_alternate(dev);
1113 * Needed, since GPIO might have disabled power of
1116 em28xx_wake_i2c(dev);
1118 v4l2->capture_type = -1;
1119 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE,
1120 dev->analog_xfer_bulk,
1123 dev->packet_multiplier,
1124 em28xx_urb_data_copy);
1129 * djh: it's not clear whether this code is still needed. I'm
1130 * leaving it in here for now entirely out of concern for
1131 * backward compatibility (the old code did it)
1134 /* Ask tuner to go to analog or radio mode */
1135 memset(&f, 0, sizeof(f));
1136 f.frequency = v4l2->frequency;
1137 owner = (struct v4l2_fh *)vq->owner;
1138 if (owner && owner->vdev->vfl_type == VFL_TYPE_RADIO)
1139 f.type = V4L2_TUNER_RADIO;
1141 f.type = V4L2_TUNER_ANALOG_TV;
1142 v4l2_device_call_all(&v4l2->v4l2_dev,
1143 0, tuner, s_frequency, &f);
1145 /* Enable video stream at TV decoder */
1146 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 1);
1149 v4l2->streaming_users++;
1154 static void em28xx_stop_streaming(struct vb2_queue *vq)
1156 struct em28xx *dev = vb2_get_drv_priv(vq);
1157 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1158 struct em28xx_dmaqueue *vidq = &dev->vidq;
1159 unsigned long flags = 0;
1161 em28xx_videodbg("%s\n", __func__);
1163 res_free(dev, vq->type);
1165 if (v4l2->streaming_users-- == 1) {
1166 /* Disable video stream at TV decoder */
1167 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0);
1169 /* Last active user, so shutdown all the URBS */
1170 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1173 spin_lock_irqsave(&dev->slock, flags);
1174 if (dev->usb_ctl.vid_buf) {
1175 vb2_buffer_done(&dev->usb_ctl.vid_buf->vb.vb2_buf,
1176 VB2_BUF_STATE_ERROR);
1177 dev->usb_ctl.vid_buf = NULL;
1179 while (!list_empty(&vidq->active)) {
1180 struct em28xx_buffer *buf;
1182 buf = list_entry(vidq->active.next, struct em28xx_buffer, list);
1183 list_del(&buf->list);
1184 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1186 spin_unlock_irqrestore(&dev->slock, flags);
1189 void em28xx_stop_vbi_streaming(struct vb2_queue *vq)
1191 struct em28xx *dev = vb2_get_drv_priv(vq);
1192 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1193 struct em28xx_dmaqueue *vbiq = &dev->vbiq;
1194 unsigned long flags = 0;
1196 em28xx_videodbg("%s\n", __func__);
1198 res_free(dev, vq->type);
1200 if (v4l2->streaming_users-- == 1) {
1201 /* Disable video stream at TV decoder */
1202 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0);
1204 /* Last active user, so shutdown all the URBS */
1205 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1208 spin_lock_irqsave(&dev->slock, flags);
1209 if (dev->usb_ctl.vbi_buf) {
1210 vb2_buffer_done(&dev->usb_ctl.vbi_buf->vb.vb2_buf,
1211 VB2_BUF_STATE_ERROR);
1212 dev->usb_ctl.vbi_buf = NULL;
1214 while (!list_empty(&vbiq->active)) {
1215 struct em28xx_buffer *buf;
1217 buf = list_entry(vbiq->active.next, struct em28xx_buffer, list);
1218 list_del(&buf->list);
1219 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1221 spin_unlock_irqrestore(&dev->slock, flags);
1225 buffer_queue(struct vb2_buffer *vb)
1227 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1228 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
1229 struct em28xx_buffer *buf =
1230 container_of(vbuf, struct em28xx_buffer, vb);
1231 struct em28xx_dmaqueue *vidq = &dev->vidq;
1232 unsigned long flags = 0;
1234 em28xx_videodbg("%s\n", __func__);
1235 buf->mem = vb2_plane_vaddr(vb, 0);
1236 buf->length = vb2_plane_size(vb, 0);
1238 spin_lock_irqsave(&dev->slock, flags);
1239 list_add_tail(&buf->list, &vidq->active);
1240 spin_unlock_irqrestore(&dev->slock, flags);
1243 static const struct vb2_ops em28xx_video_qops = {
1244 .queue_setup = queue_setup,
1245 .buf_prepare = buffer_prepare,
1246 .buf_queue = buffer_queue,
1247 .start_streaming = em28xx_start_analog_streaming,
1248 .stop_streaming = em28xx_stop_streaming,
1249 .wait_prepare = vb2_ops_wait_prepare,
1250 .wait_finish = vb2_ops_wait_finish,
1253 static int em28xx_vb2_setup(struct em28xx *dev)
1256 struct vb2_queue *q;
1257 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1259 /* Setup Videobuf2 for Video capture */
1261 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1262 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1263 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1265 q->buf_struct_size = sizeof(struct em28xx_buffer);
1266 q->ops = &em28xx_video_qops;
1267 q->mem_ops = &vb2_vmalloc_memops;
1269 rc = vb2_queue_init(q);
1273 /* Setup Videobuf2 for VBI capture */
1275 q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1276 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
1277 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1279 q->buf_struct_size = sizeof(struct em28xx_buffer);
1280 q->ops = &em28xx_vbi_qops;
1281 q->mem_ops = &vb2_vmalloc_memops;
1283 rc = vb2_queue_init(q);
1294 static void video_mux(struct em28xx *dev, int index)
1296 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
1298 dev->ctl_input = index;
1299 dev->ctl_ainput = INPUT(index)->amux;
1300 dev->ctl_aoutput = INPUT(index)->aout;
1302 if (!dev->ctl_aoutput)
1303 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1305 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
1306 INPUT(index)->vmux, 0, 0);
1308 if (dev->has_msp34xx) {
1309 if (dev->i2s_speed) {
1310 v4l2_device_call_all(v4l2_dev, 0, audio,
1311 s_i2s_clock_freq, dev->i2s_speed);
1313 /* Note: this is msp3400 specific */
1314 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1316 MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
1319 if (dev->board.adecoder != EM28XX_NOADECODER) {
1320 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1321 dev->ctl_ainput, dev->ctl_aoutput, 0);
1324 em28xx_audio_analog_set(dev);
1327 static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv)
1329 struct em28xx *dev = priv;
1332 * In the case of non-AC97 volume controls, we still need
1333 * to do some setups at em28xx, in order to mute/unmute
1334 * and to adjust audio volume. However, the value ranges
1335 * should be checked by the corresponding V4L subdriver.
1338 case V4L2_CID_AUDIO_MUTE:
1339 dev->mute = ctrl->val;
1340 em28xx_audio_analog_set(dev);
1342 case V4L2_CID_AUDIO_VOLUME:
1343 dev->volume = ctrl->val;
1344 em28xx_audio_analog_set(dev);
1349 static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl)
1351 struct em28xx_v4l2 *v4l2 =
1352 container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler);
1353 struct em28xx *dev = v4l2->dev;
1357 case V4L2_CID_AUDIO_MUTE:
1358 dev->mute = ctrl->val;
1359 ret = em28xx_audio_analog_set(dev);
1361 case V4L2_CID_AUDIO_VOLUME:
1362 dev->volume = ctrl->val;
1363 ret = em28xx_audio_analog_set(dev);
1365 case V4L2_CID_CONTRAST:
1366 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val);
1368 case V4L2_CID_BRIGHTNESS:
1369 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val);
1371 case V4L2_CID_SATURATION:
1372 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val);
1374 case V4L2_CID_BLUE_BALANCE:
1375 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val);
1377 case V4L2_CID_RED_BALANCE:
1378 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val);
1380 case V4L2_CID_SHARPNESS:
1381 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val);
1385 return (ret < 0) ? ret : 0;
1388 static const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
1389 .s_ctrl = em28xx_s_ctrl,
1392 static void size_to_scale(struct em28xx *dev,
1393 unsigned int width, unsigned int height,
1394 unsigned int *hscale, unsigned int *vscale)
1396 unsigned int maxw = norm_maxw(dev);
1397 unsigned int maxh = norm_maxh(dev);
1399 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1400 if (*hscale > EM28XX_HVSCALE_MAX)
1401 *hscale = EM28XX_HVSCALE_MAX;
1403 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1404 if (*vscale > EM28XX_HVSCALE_MAX)
1405 *vscale = EM28XX_HVSCALE_MAX;
1408 static void scale_to_size(struct em28xx *dev,
1409 unsigned int hscale, unsigned int vscale,
1410 unsigned int *width, unsigned int *height)
1412 unsigned int maxw = norm_maxw(dev);
1413 unsigned int maxh = norm_maxh(dev);
1415 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1416 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1418 /* Don't let width or height to be zero */
1426 * IOCTL vidioc handling
1429 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1430 struct v4l2_format *f)
1432 struct em28xx *dev = video_drvdata(file);
1433 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1435 f->fmt.pix.width = v4l2->width;
1436 f->fmt.pix.height = v4l2->height;
1437 f->fmt.pix.pixelformat = v4l2->format->fourcc;
1438 f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3;
1439 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height;
1440 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1442 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1443 if (v4l2->progressive)
1444 f->fmt.pix.field = V4L2_FIELD_NONE;
1446 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1447 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1451 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1455 for (i = 0; i < ARRAY_SIZE(format); i++)
1456 if (format[i].fourcc == fourcc)
1462 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1463 struct v4l2_format *f)
1465 struct em28xx *dev = video_drvdata(file);
1466 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1467 unsigned int width = f->fmt.pix.width;
1468 unsigned int height = f->fmt.pix.height;
1469 unsigned int maxw = norm_maxw(dev);
1470 unsigned int maxh = norm_maxh(dev);
1471 unsigned int hscale, vscale;
1472 struct em28xx_fmt *fmt;
1474 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1477 em28xx_videodbg("Fourcc format (%08x) invalid. Using default (%08x).\n",
1478 f->fmt.pix.pixelformat, fmt->fourcc);
1481 if (dev->board.is_em2800) {
1482 /* the em2800 can only scale down to 50% */
1483 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1484 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1486 * MaxPacketSize for em2800 is too small to capture at full
1487 * resolution use half of maxw as the scaler can only scale
1490 if (width == maxw && height == maxh)
1494 * width must even because of the YUYV format
1495 * height must be even because of interlacing
1497 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1500 /* Avoid division by zero at size_to_scale */
1506 size_to_scale(dev, width, height, &hscale, &vscale);
1507 scale_to_size(dev, hscale, vscale, &width, &height);
1509 f->fmt.pix.width = width;
1510 f->fmt.pix.height = height;
1511 f->fmt.pix.pixelformat = fmt->fourcc;
1512 f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
1513 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1514 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1515 if (v4l2->progressive)
1516 f->fmt.pix.field = V4L2_FIELD_NONE;
1518 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1519 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1520 f->fmt.pix.priv = 0;
1525 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1526 unsigned int width, unsigned int height)
1528 struct em28xx_fmt *fmt;
1529 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1531 fmt = format_by_fourcc(fourcc);
1536 v4l2->width = width;
1537 v4l2->height = height;
1539 /* set new image size */
1540 size_to_scale(dev, v4l2->width, v4l2->height,
1541 &v4l2->hscale, &v4l2->vscale);
1543 em28xx_resolution_set(dev);
1548 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1549 struct v4l2_format *f)
1551 struct em28xx *dev = video_drvdata(file);
1552 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1554 if (vb2_is_busy(&v4l2->vb_vidq))
1557 vidioc_try_fmt_vid_cap(file, priv, f);
1559 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1560 f->fmt.pix.width, f->fmt.pix.height);
1563 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1565 struct em28xx *dev = video_drvdata(file);
1567 *norm = dev->v4l2->norm;
1572 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
1574 struct em28xx *dev = video_drvdata(file);
1576 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm);
1581 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
1583 struct em28xx *dev = video_drvdata(file);
1584 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1585 struct v4l2_format f;
1587 if (norm == v4l2->norm)
1590 if (v4l2->streaming_users > 0)
1595 /* Adjusts width/height, if needed */
1596 f.fmt.pix.width = 720;
1597 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576;
1598 vidioc_try_fmt_vid_cap(file, priv, &f);
1600 /* set new image size */
1601 v4l2->width = f.fmt.pix.width;
1602 v4l2->height = f.fmt.pix.height;
1603 size_to_scale(dev, v4l2->width, v4l2->height,
1604 &v4l2->hscale, &v4l2->vscale);
1606 em28xx_resolution_set(dev);
1607 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
1612 static int vidioc_g_parm(struct file *file, void *priv,
1613 struct v4l2_streamparm *p)
1615 struct v4l2_subdev_frame_interval ival = { 0 };
1616 struct em28xx *dev = video_drvdata(file);
1617 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1620 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1621 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1624 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1625 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1626 if (dev->is_webcam) {
1627 rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0,
1628 video, g_frame_interval, &ival);
1630 p->parm.capture.timeperframe = ival.interval;
1632 v4l2_video_std_frame_period(v4l2->norm,
1633 &p->parm.capture.timeperframe);
1639 static int vidioc_s_parm(struct file *file, void *priv,
1640 struct v4l2_streamparm *p)
1642 struct em28xx *dev = video_drvdata(file);
1643 struct v4l2_subdev_frame_interval ival = {
1645 p->parm.capture.timeperframe
1649 if (!dev->is_webcam)
1652 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1653 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1656 memset(&p->parm, 0, sizeof(p->parm));
1657 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1658 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1659 rc = v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 0,
1660 video, s_frame_interval, &ival);
1662 p->parm.capture.timeperframe = ival.interval;
1666 static int vidioc_enum_input(struct file *file, void *priv,
1667 struct v4l2_input *i)
1669 struct em28xx *dev = video_drvdata(file);
1674 if (n >= MAX_EM28XX_INPUT)
1676 if (!INPUT(n)->type)
1679 i->type = V4L2_INPUT_TYPE_CAMERA;
1681 strcpy(i->name, iname[INPUT(n)->type]);
1683 if (INPUT(n)->type == EM28XX_VMUX_TELEVISION)
1684 i->type = V4L2_INPUT_TYPE_TUNER;
1686 i->std = dev->v4l2->vdev.tvnorms;
1687 /* webcams do not have the STD API */
1689 i->capabilities = 0;
1691 /* Dynamically generates an audioset bitmask */
1693 for (j = 0; j < MAX_EM28XX_INPUT; j++)
1694 if (dev->amux_map[j] != EM28XX_AMUX_UNUSED)
1695 i->audioset |= 1 << j;
1700 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1702 struct em28xx *dev = video_drvdata(file);
1704 *i = dev->ctl_input;
1709 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1711 struct em28xx *dev = video_drvdata(file);
1713 if (i >= MAX_EM28XX_INPUT)
1715 if (!INPUT(i)->type)
1722 static int em28xx_fill_audio_input(struct em28xx *dev,
1724 struct v4l2_audio *a,
1727 unsigned int idx = dev->amux_map[index];
1730 * With msp3400, almost all mappings use the default (amux = 0).
1731 * The only one may use a different value is WinTV USB2, where it
1732 * can also be SCART1 input.
1733 * As it is very doubtful that we would see new boards with msp3400,
1734 * let's just reuse the existing switch.
1736 if (dev->has_msp34xx && idx != EM28XX_AMUX_UNUSED)
1737 idx = EM28XX_AMUX_LINE_IN;
1740 case EM28XX_AMUX_VIDEO:
1741 strcpy(a->name, "Television");
1743 case EM28XX_AMUX_LINE_IN:
1744 strcpy(a->name, "Line In");
1746 case EM28XX_AMUX_VIDEO2:
1747 strcpy(a->name, "Television alt");
1749 case EM28XX_AMUX_PHONE:
1750 strcpy(a->name, "Phone");
1752 case EM28XX_AMUX_MIC:
1753 strcpy(a->name, "Mic");
1755 case EM28XX_AMUX_CD:
1756 strcpy(a->name, "CD");
1758 case EM28XX_AMUX_AUX:
1759 strcpy(a->name, "Aux");
1761 case EM28XX_AMUX_PCM_OUT:
1762 strcpy(a->name, "PCM");
1764 case EM28XX_AMUX_UNUSED:
1769 a->capability = V4L2_AUDCAP_STEREO;
1771 em28xx_videodbg("%s: audio input index %d is '%s'\n",
1772 s, a->index, a->name);
1777 static int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *a)
1779 struct em28xx *dev = video_drvdata(file);
1781 if (a->index >= MAX_EM28XX_INPUT)
1784 return em28xx_fill_audio_input(dev, __func__, a, a->index);
1787 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1789 struct em28xx *dev = video_drvdata(file);
1792 for (i = 0; i < MAX_EM28XX_INPUT; i++)
1793 if (dev->ctl_ainput == dev->amux_map[i])
1794 return em28xx_fill_audio_input(dev, __func__, a, i);
1796 /* Should never happen! */
1800 static int vidioc_s_audio(struct file *file, void *priv,
1801 const struct v4l2_audio *a)
1803 struct em28xx *dev = video_drvdata(file);
1806 if (a->index >= MAX_EM28XX_INPUT)
1809 idx = dev->amux_map[a->index];
1811 if (idx == EM28XX_AMUX_UNUSED)
1814 dev->ctl_ainput = idx;
1817 * FIXME: This is wrong, as different inputs at em28xx_cards
1818 * may have different audio outputs. So, the right thing
1819 * to do is to implement VIDIOC_G_AUDOUT/VIDIOC_S_AUDOUT.
1820 * With the current board definitions, this would work fine,
1821 * as, currently, all boards fit.
1823 for (i = 0; i < MAX_EM28XX_INPUT; i++)
1824 if (idx == dev->amux_map[i])
1826 if (i == MAX_EM28XX_INPUT)
1829 dev->ctl_aoutput = INPUT(i)->aout;
1831 if (!dev->ctl_aoutput)
1832 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1834 em28xx_videodbg("%s: set audio input to %d\n", __func__,
1840 static int vidioc_g_tuner(struct file *file, void *priv,
1841 struct v4l2_tuner *t)
1843 struct em28xx *dev = video_drvdata(file);
1848 strcpy(t->name, "Tuner");
1850 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
1854 static int vidioc_s_tuner(struct file *file, void *priv,
1855 const struct v4l2_tuner *t)
1857 struct em28xx *dev = video_drvdata(file);
1862 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
1866 static int vidioc_g_frequency(struct file *file, void *priv,
1867 struct v4l2_frequency *f)
1869 struct em28xx *dev = video_drvdata(file);
1870 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1875 f->frequency = v4l2->frequency;
1879 static int vidioc_s_frequency(struct file *file, void *priv,
1880 const struct v4l2_frequency *f)
1882 struct v4l2_frequency new_freq = *f;
1883 struct em28xx *dev = video_drvdata(file);
1884 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1889 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f);
1890 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq);
1891 v4l2->frequency = new_freq.frequency;
1896 #ifdef CONFIG_VIDEO_ADV_DEBUG
1897 static int vidioc_g_chip_info(struct file *file, void *priv,
1898 struct v4l2_dbg_chip_info *chip)
1900 struct em28xx *dev = video_drvdata(file);
1902 if (chip->match.addr > 1)
1904 if (chip->match.addr == 1)
1905 strlcpy(chip->name, "ac97", sizeof(chip->name));
1908 dev->v4l2->v4l2_dev.name, sizeof(chip->name));
1912 static int em28xx_reg_len(int reg)
1915 case EM28XX_R40_AC97LSB:
1916 case EM28XX_R30_HSCALELOW:
1917 case EM28XX_R32_VSCALELOW:
1924 static int vidioc_g_register(struct file *file, void *priv,
1925 struct v4l2_dbg_register *reg)
1927 struct em28xx *dev = video_drvdata(file);
1930 if (reg->match.addr > 1)
1932 if (reg->match.addr) {
1933 ret = em28xx_read_ac97(dev, reg->reg);
1943 reg->size = em28xx_reg_len(reg->reg);
1944 if (reg->size == 1) {
1945 ret = em28xx_read_reg(dev, reg->reg);
1954 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1955 reg->reg, (char *)&val, 2);
1959 reg->val = le16_to_cpu(val);
1965 static int vidioc_s_register(struct file *file, void *priv,
1966 const struct v4l2_dbg_register *reg)
1968 struct em28xx *dev = video_drvdata(file);
1971 if (reg->match.addr > 1)
1973 if (reg->match.addr)
1974 return em28xx_write_ac97(dev, reg->reg, reg->val);
1977 buf = cpu_to_le16(reg->val);
1979 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1980 em28xx_reg_len(reg->reg));
1984 static int vidioc_querycap(struct file *file, void *priv,
1985 struct v4l2_capability *cap)
1987 struct video_device *vdev = video_devdata(file);
1988 struct em28xx *dev = video_drvdata(file);
1989 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1990 struct usb_device *udev = interface_to_usbdev(dev->intf);
1992 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1993 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1994 usb_make_path(udev, cap->bus_info, sizeof(cap->bus_info));
1996 if (vdev->vfl_type == VFL_TYPE_GRABBER)
1997 cap->device_caps = V4L2_CAP_READWRITE |
1998 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1999 else if (vdev->vfl_type == VFL_TYPE_RADIO)
2000 cap->device_caps = V4L2_CAP_RADIO;
2002 cap->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE;
2004 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
2005 cap->device_caps |= V4L2_CAP_AUDIO;
2007 if (dev->tuner_type != TUNER_ABSENT)
2008 cap->device_caps |= V4L2_CAP_TUNER;
2010 cap->capabilities = cap->device_caps |
2011 V4L2_CAP_DEVICE_CAPS | V4L2_CAP_READWRITE |
2012 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
2013 if (video_is_registered(&v4l2->vbi_dev))
2014 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
2015 if (video_is_registered(&v4l2->radio_dev))
2016 cap->capabilities |= V4L2_CAP_RADIO;
2020 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
2021 struct v4l2_fmtdesc *f)
2023 if (unlikely(f->index >= ARRAY_SIZE(format)))
2026 strlcpy(f->description, format[f->index].name, sizeof(f->description));
2027 f->pixelformat = format[f->index].fourcc;
2032 static int vidioc_enum_framesizes(struct file *file, void *priv,
2033 struct v4l2_frmsizeenum *fsize)
2035 struct em28xx *dev = video_drvdata(file);
2036 struct em28xx_fmt *fmt;
2037 unsigned int maxw = norm_maxw(dev);
2038 unsigned int maxh = norm_maxh(dev);
2040 fmt = format_by_fourcc(fsize->pixel_format);
2042 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
2043 fsize->pixel_format);
2047 if (dev->board.is_em2800) {
2048 if (fsize->index > 1)
2050 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
2051 fsize->discrete.width = maxw / (1 + fsize->index);
2052 fsize->discrete.height = maxh / (1 + fsize->index);
2056 if (fsize->index != 0)
2059 /* Report a continuous range */
2060 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
2061 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
2062 &fsize->stepwise.min_width, &fsize->stepwise.min_height);
2063 if (fsize->stepwise.min_width < 48)
2064 fsize->stepwise.min_width = 48;
2065 if (fsize->stepwise.min_height < 38)
2066 fsize->stepwise.min_height = 38;
2067 fsize->stepwise.max_width = maxw;
2068 fsize->stepwise.max_height = maxh;
2069 fsize->stepwise.step_width = 1;
2070 fsize->stepwise.step_height = 1;
2074 /* RAW VBI ioctls */
2076 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
2077 struct v4l2_format *format)
2079 struct em28xx *dev = video_drvdata(file);
2080 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2082 format->fmt.vbi.samples_per_line = v4l2->vbi_width;
2083 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
2084 format->fmt.vbi.offset = 0;
2085 format->fmt.vbi.flags = 0;
2086 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
2087 format->fmt.vbi.count[0] = v4l2->vbi_height;
2088 format->fmt.vbi.count[1] = v4l2->vbi_height;
2089 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
2091 /* Varies by video standard (NTSC, PAL, etc.) */
2092 if (v4l2->norm & V4L2_STD_525_60) {
2094 format->fmt.vbi.start[0] = 10;
2095 format->fmt.vbi.start[1] = 273;
2096 } else if (v4l2->norm & V4L2_STD_625_50) {
2098 format->fmt.vbi.start[0] = 6;
2099 format->fmt.vbi.start[1] = 318;
2106 * RADIO ESPECIFIC IOCTLS
2109 static int radio_g_tuner(struct file *file, void *priv,
2110 struct v4l2_tuner *t)
2112 struct em28xx *dev = video_drvdata(file);
2114 if (unlikely(t->index > 0))
2117 strcpy(t->name, "Radio");
2119 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
2124 static int radio_s_tuner(struct file *file, void *priv,
2125 const struct v4l2_tuner *t)
2127 struct em28xx *dev = video_drvdata(file);
2132 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
2138 * em28xx_free_v4l2() - Free struct em28xx_v4l2
2140 * @ref: struct kref for struct em28xx_v4l2
2142 * Called when all users of struct em28xx_v4l2 are gone
2144 static void em28xx_free_v4l2(struct kref *ref)
2146 struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref);
2148 v4l2->dev->v4l2 = NULL;
2153 * em28xx_v4l2_open()
2154 * inits the device and starts isoc transfer
2156 static int em28xx_v4l2_open(struct file *filp)
2158 struct video_device *vdev = video_devdata(filp);
2159 struct em28xx *dev = video_drvdata(filp);
2160 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2161 enum v4l2_buf_type fh_type = 0;
2164 switch (vdev->vfl_type) {
2165 case VFL_TYPE_GRABBER:
2166 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2169 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2171 case VFL_TYPE_RADIO:
2177 em28xx_videodbg("open dev=%s type=%s users=%d\n",
2178 video_device_node_name(vdev), v4l2_type_names[fh_type],
2181 if (mutex_lock_interruptible(&dev->lock))
2182 return -ERESTARTSYS;
2184 ret = v4l2_fh_open(filp);
2186 dev_err(&dev->intf->dev,
2187 "%s: v4l2_fh_open() returned error %d\n",
2189 mutex_unlock(&dev->lock);
2193 if (v4l2->users == 0) {
2194 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2196 if (vdev->vfl_type != VFL_TYPE_RADIO)
2197 em28xx_resolution_set(dev);
2200 * Needed, since GPIO might have disabled power
2201 * of some i2c devices
2203 em28xx_wake_i2c(dev);
2206 if (vdev->vfl_type == VFL_TYPE_RADIO) {
2207 em28xx_videodbg("video_open: setting radio device\n");
2208 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio);
2211 kref_get(&dev->ref);
2212 kref_get(&v4l2->ref);
2215 mutex_unlock(&dev->lock);
2221 * em28xx_v4l2_fini()
2222 * unregisters the v4l2,i2c and usb devices
2223 * called when the device gets disconected or at module unload
2225 static int em28xx_v4l2_fini(struct em28xx *dev)
2227 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2229 if (dev->is_audio_only) {
2230 /* Shouldn't initialize IR for this interface */
2234 if (!dev->has_video) {
2235 /* This device does not support the v4l2 extension */
2242 dev_info(&dev->intf->dev, "Closing video extension\n");
2244 mutex_lock(&dev->lock);
2246 v4l2_device_disconnect(&v4l2->v4l2_dev);
2248 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
2250 em28xx_v4l2_media_release(dev);
2252 if (video_is_registered(&v4l2->radio_dev)) {
2253 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2254 video_device_node_name(&v4l2->radio_dev));
2255 video_unregister_device(&v4l2->radio_dev);
2257 if (video_is_registered(&v4l2->vbi_dev)) {
2258 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2259 video_device_node_name(&v4l2->vbi_dev));
2260 video_unregister_device(&v4l2->vbi_dev);
2262 if (video_is_registered(&v4l2->vdev)) {
2263 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2264 video_device_node_name(&v4l2->vdev));
2265 video_unregister_device(&v4l2->vdev);
2268 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2269 v4l2_device_unregister(&v4l2->v4l2_dev);
2271 kref_put(&v4l2->ref, em28xx_free_v4l2);
2273 mutex_unlock(&dev->lock);
2275 kref_put(&dev->ref, em28xx_free_device);
2280 static int em28xx_v4l2_suspend(struct em28xx *dev)
2282 if (dev->is_audio_only)
2285 if (!dev->has_video)
2288 dev_info(&dev->intf->dev, "Suspending video extension\n");
2289 em28xx_stop_urbs(dev);
2293 static int em28xx_v4l2_resume(struct em28xx *dev)
2295 if (dev->is_audio_only)
2298 if (!dev->has_video)
2301 dev_info(&dev->intf->dev, "Resuming video extension\n");
2302 /* what do we do here */
2307 * em28xx_v4l2_close()
2308 * stops streaming and deallocates all resources allocated by the v4l2
2311 static int em28xx_v4l2_close(struct file *filp)
2313 struct em28xx *dev = video_drvdata(filp);
2314 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2315 struct usb_device *udev = interface_to_usbdev(dev->intf);
2318 em28xx_videodbg("users=%d\n", v4l2->users);
2320 vb2_fop_release(filp);
2321 mutex_lock(&dev->lock);
2323 if (v4l2->users == 1) {
2324 /* No sense to try to write to the device */
2325 if (dev->disconnected)
2328 /* Save some power by putting tuner to sleep */
2329 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2331 /* do this before setting alternate! */
2332 em28xx_set_mode(dev, EM28XX_SUSPEND);
2334 /* set alternate 0 */
2336 em28xx_videodbg("setting alternate 0\n");
2337 err = usb_set_interface(udev, 0, 0);
2339 dev_err(&dev->intf->dev,
2340 "cannot change alternate number to 0 (error=%i)\n",
2347 kref_put(&v4l2->ref, em28xx_free_v4l2);
2348 mutex_unlock(&dev->lock);
2349 kref_put(&dev->ref, em28xx_free_device);
2354 static const struct v4l2_file_operations em28xx_v4l_fops = {
2355 .owner = THIS_MODULE,
2356 .open = em28xx_v4l2_open,
2357 .release = em28xx_v4l2_close,
2358 .read = vb2_fop_read,
2359 .poll = vb2_fop_poll,
2360 .mmap = vb2_fop_mmap,
2361 .unlocked_ioctl = video_ioctl2,
2364 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2365 .vidioc_querycap = vidioc_querycap,
2366 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2367 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2368 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2369 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
2370 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2371 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2372 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2373 .vidioc_enum_framesizes = vidioc_enum_framesizes,
2374 .vidioc_enumaudio = vidioc_enumaudio,
2375 .vidioc_g_audio = vidioc_g_audio,
2376 .vidioc_s_audio = vidioc_s_audio,
2378 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2379 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2380 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
2381 .vidioc_querybuf = vb2_ioctl_querybuf,
2382 .vidioc_qbuf = vb2_ioctl_qbuf,
2383 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2385 .vidioc_g_std = vidioc_g_std,
2386 .vidioc_querystd = vidioc_querystd,
2387 .vidioc_s_std = vidioc_s_std,
2388 .vidioc_g_parm = vidioc_g_parm,
2389 .vidioc_s_parm = vidioc_s_parm,
2390 .vidioc_enum_input = vidioc_enum_input,
2391 .vidioc_g_input = vidioc_g_input,
2392 .vidioc_s_input = vidioc_s_input,
2393 .vidioc_streamon = vb2_ioctl_streamon,
2394 .vidioc_streamoff = vb2_ioctl_streamoff,
2395 .vidioc_g_tuner = vidioc_g_tuner,
2396 .vidioc_s_tuner = vidioc_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,
2408 static const struct video_device em28xx_video_template = {
2409 .fops = &em28xx_v4l_fops,
2410 .ioctl_ops = &video_ioctl_ops,
2411 .release = video_device_release_empty,
2412 .tvnorms = V4L2_STD_ALL,
2415 static const struct v4l2_file_operations radio_fops = {
2416 .owner = THIS_MODULE,
2417 .open = em28xx_v4l2_open,
2418 .release = em28xx_v4l2_close,
2419 .unlocked_ioctl = video_ioctl2,
2422 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2423 .vidioc_querycap = vidioc_querycap,
2424 .vidioc_g_tuner = radio_g_tuner,
2425 .vidioc_s_tuner = radio_s_tuner,
2426 .vidioc_g_frequency = vidioc_g_frequency,
2427 .vidioc_s_frequency = vidioc_s_frequency,
2428 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2429 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2430 #ifdef CONFIG_VIDEO_ADV_DEBUG
2431 .vidioc_g_chip_info = vidioc_g_chip_info,
2432 .vidioc_g_register = vidioc_g_register,
2433 .vidioc_s_register = vidioc_s_register,
2437 static struct video_device em28xx_radio_template = {
2438 .fops = &radio_fops,
2439 .ioctl_ops = &radio_ioctl_ops,
2440 .release = video_device_release_empty,
2443 /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */
2444 static unsigned short saa711x_addrs[] = {
2445 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */
2446 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */
2449 static unsigned short tvp5150_addrs[] = {
2455 static unsigned short msp3400_addrs[] = {
2461 /******************************** usb interface ******************************/
2463 static void em28xx_vdev_init(struct em28xx *dev,
2464 struct video_device *vfd,
2465 const struct video_device *template,
2466 const char *type_name)
2469 vfd->v4l2_dev = &dev->v4l2->v4l2_dev;
2470 vfd->lock = &dev->lock;
2474 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2475 dev_name(&dev->intf->dev), type_name);
2477 video_set_drvdata(vfd, dev);
2480 static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr)
2482 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2483 struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev;
2484 struct tuner_setup tun_setup;
2485 struct v4l2_frequency f;
2487 memset(&tun_setup, 0, sizeof(tun_setup));
2489 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
2490 tun_setup.tuner_callback = em28xx_tuner_callback;
2492 if (dev->board.radio.type) {
2493 tun_setup.type = dev->board.radio.type;
2494 tun_setup.addr = dev->board.radio_addr;
2496 v4l2_device_call_all(v4l2_dev,
2497 0, tuner, s_type_addr, &tun_setup);
2500 if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type) {
2501 tun_setup.type = dev->tuner_type;
2502 tun_setup.addr = tuner_addr;
2504 v4l2_device_call_all(v4l2_dev,
2505 0, tuner, s_type_addr, &tun_setup);
2508 if (dev->board.tda9887_conf) {
2509 struct v4l2_priv_tun_config tda9887_cfg;
2511 tda9887_cfg.tuner = TUNER_TDA9887;
2512 tda9887_cfg.priv = &dev->board.tda9887_conf;
2514 v4l2_device_call_all(v4l2_dev,
2515 0, tuner, s_config, &tda9887_cfg);
2518 if (dev->tuner_type == TUNER_XC2028) {
2519 struct v4l2_priv_tun_config xc2028_cfg;
2520 struct xc2028_ctrl ctl;
2522 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg));
2523 memset(&ctl, 0, sizeof(ctl));
2525 em28xx_setup_xc3028(dev, &ctl);
2527 xc2028_cfg.tuner = TUNER_XC2028;
2528 xc2028_cfg.priv = &ctl;
2530 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg);
2533 /* configure tuner */
2535 f.type = V4L2_TUNER_ANALOG_TV;
2536 f.frequency = 9076; /* just a magic number */
2537 v4l2->frequency = f.frequency;
2538 v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f);
2541 static int em28xx_v4l2_init(struct em28xx *dev)
2546 struct v4l2_ctrl_handler *hdl;
2547 struct em28xx_v4l2 *v4l2;
2549 if (dev->is_audio_only) {
2550 /* Shouldn't initialize IR for this interface */
2554 if (!dev->has_video) {
2555 /* This device does not support the v4l2 extension */
2559 dev_info(&dev->intf->dev, "Registering V4L2 extension\n");
2561 mutex_lock(&dev->lock);
2563 v4l2 = kzalloc(sizeof(*v4l2), GFP_KERNEL);
2565 mutex_unlock(&dev->lock);
2568 kref_init(&v4l2->ref);
2572 #ifdef CONFIG_MEDIA_CONTROLLER
2573 v4l2->v4l2_dev.mdev = dev->media_dev;
2575 ret = v4l2_device_register(&dev->intf->dev, &v4l2->v4l2_dev);
2577 dev_err(&dev->intf->dev,
2578 "Call to v4l2_device_register() failed!\n");
2582 hdl = &v4l2->ctrl_handler;
2583 v4l2_ctrl_handler_init(hdl, 8);
2584 v4l2->v4l2_dev.ctrl_handler = hdl;
2587 v4l2->progressive = true;
2590 * Default format, used for tvp5150 or saa711x output formats
2592 v4l2->vinmode = EM28XX_VINMODE_YUV422_CbYCrY;
2593 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED |
2594 EM28XX_VINCTRL_CCIR656_ENABLE;
2596 /* request some modules */
2598 if (dev->has_msp34xx)
2599 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2600 &dev->i2c_adap[dev->def_i2c_bus],
2601 "msp3400", 0, msp3400_addrs);
2603 if (dev->board.decoder == EM28XX_SAA711X)
2604 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2605 &dev->i2c_adap[dev->def_i2c_bus],
2606 "saa7115_auto", 0, saa711x_addrs);
2608 if (dev->board.decoder == EM28XX_TVP5150)
2609 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2610 &dev->i2c_adap[dev->def_i2c_bus],
2611 "tvp5150", 0, tvp5150_addrs);
2613 if (dev->board.adecoder == EM28XX_TVAUDIO)
2614 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2615 &dev->i2c_adap[dev->def_i2c_bus],
2616 "tvaudio", dev->board.tvaudio_addr, NULL);
2618 /* Initialize tuner and camera */
2620 if (dev->board.tuner_type != TUNER_ABSENT) {
2621 unsigned short tuner_addr = dev->board.tuner_addr;
2622 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT);
2624 if (dev->board.radio.type)
2625 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2626 &dev->i2c_adap[dev->def_i2c_bus],
2627 "tuner", dev->board.radio_addr,
2631 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2632 &dev->i2c_adap[dev->def_i2c_bus],
2634 v4l2_i2c_tuner_addrs(ADDRS_DEMOD));
2635 if (tuner_addr == 0) {
2636 enum v4l2_i2c_tuner_type type =
2637 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV;
2638 struct v4l2_subdev *sd;
2640 sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2641 &dev->i2c_adap[dev->def_i2c_bus],
2643 v4l2_i2c_tuner_addrs(type));
2646 tuner_addr = v4l2_i2c_subdev_addr(sd);
2648 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2649 &dev->i2c_adap[dev->def_i2c_bus],
2650 "tuner", tuner_addr, NULL);
2653 em28xx_tuner_setup(dev, tuner_addr);
2656 if (dev->em28xx_sensor != EM28XX_NOSENSOR)
2657 em28xx_init_camera(dev);
2659 /* Configure audio */
2660 ret = em28xx_audio_setup(dev);
2662 dev_err(&dev->intf->dev,
2663 "%s: Error while setting audio - error [%d]!\n",
2665 goto unregister_dev;
2667 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
2668 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2669 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
2670 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2671 V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f);
2673 /* install the em28xx notify callback */
2674 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE),
2675 em28xx_ctrl_notify, dev);
2676 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME),
2677 em28xx_ctrl_notify, dev);
2680 /* wake i2c devices */
2681 em28xx_wake_i2c(dev);
2683 /* init video dma queues */
2684 INIT_LIST_HEAD(&dev->vidq.active);
2685 INIT_LIST_HEAD(&dev->vbiq.active);
2687 if (dev->has_msp34xx) {
2688 /* Send a reset to other chips via gpio */
2689 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7);
2691 dev_err(&dev->intf->dev,
2692 "%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n",
2694 goto unregister_dev;
2696 usleep_range(10000, 11000);
2698 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff);
2700 dev_err(&dev->intf->dev,
2701 "%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n",
2703 goto unregister_dev;
2705 usleep_range(10000, 11000);
2708 /* set default norm */
2709 v4l2->norm = V4L2_STD_PAL;
2710 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
2711 v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT;
2713 /* Analog specific initialization */
2714 v4l2->format = &format[0];
2716 maxw = norm_maxw(dev);
2718 * MaxPacketSize for em2800 is too small to capture at full resolution
2719 * use half of maxw as the scaler can only scale to 50%
2721 if (dev->board.is_em2800)
2724 em28xx_set_video_format(dev, format[0].fourcc,
2725 maxw, norm_maxh(dev));
2729 /* Audio defaults */
2733 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2734 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2735 em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2736 (EM28XX_XCLK_AUDIO_UNMUTE | val));
2738 em28xx_set_outfmt(dev);
2740 /* Add image controls */
2743 * NOTE: at this point, the subdevices are already registered, so
2744 * bridge controls are only added/enabled when no subdevice provides
2747 if (!v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST))
2748 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2750 0, 0x1f, 1, CONTRAST_DEFAULT);
2751 if (!v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS))
2752 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2753 V4L2_CID_BRIGHTNESS,
2754 -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT);
2755 if (!v4l2_ctrl_find(hdl, V4L2_CID_SATURATION))
2756 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2757 V4L2_CID_SATURATION,
2758 0, 0x1f, 1, SATURATION_DEFAULT);
2759 if (!v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE))
2760 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2761 V4L2_CID_BLUE_BALANCE,
2762 -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT);
2763 if (!v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE))
2764 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2765 V4L2_CID_RED_BALANCE,
2766 -0x30, 0x30, 1, RED_BALANCE_DEFAULT);
2767 if (!v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS))
2768 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2770 0, 0x0f, 1, SHARPNESS_DEFAULT);
2772 /* Reset image controls */
2773 em28xx_colorlevels_set_default(dev);
2774 v4l2_ctrl_handler_setup(hdl);
2777 goto unregister_dev;
2779 /* allocate and fill video video_device struct */
2780 em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video");
2781 mutex_init(&v4l2->vb_queue_lock);
2782 mutex_init(&v4l2->vb_vbi_queue_lock);
2783 v4l2->vdev.queue = &v4l2->vb_vidq;
2784 v4l2->vdev.queue->lock = &v4l2->vb_queue_lock;
2786 /* disable inapplicable ioctls */
2787 if (dev->is_webcam) {
2788 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD);
2789 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD);
2790 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD);
2792 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM);
2794 if (dev->tuner_type == TUNER_ABSENT) {
2795 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER);
2796 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER);
2797 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY);
2798 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY);
2800 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2801 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO);
2802 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO);
2805 /* register v4l2 video video_device */
2806 ret = video_register_device(&v4l2->vdev, VFL_TYPE_GRABBER,
2807 video_nr[dev->devno]);
2809 dev_err(&dev->intf->dev,
2810 "unable to register video device (error=%i).\n", ret);
2811 goto unregister_dev;
2814 /* Allocate and fill vbi video_device struct */
2815 if (em28xx_vbi_supported(dev) == 1) {
2816 em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template,
2819 v4l2->vbi_dev.queue = &v4l2->vb_vbiq;
2820 v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock;
2822 /* disable inapplicable ioctls */
2823 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM);
2824 if (dev->tuner_type == TUNER_ABSENT) {
2825 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER);
2826 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER);
2827 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY);
2828 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY);
2830 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2831 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO);
2832 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO);
2835 /* register v4l2 vbi video_device */
2836 ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI,
2837 vbi_nr[dev->devno]);
2839 dev_err(&dev->intf->dev,
2840 "unable to register vbi device\n");
2841 goto unregister_dev;
2845 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2846 em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template,
2848 ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO,
2849 radio_nr[dev->devno]);
2851 dev_err(&dev->intf->dev,
2852 "can't register radio device\n");
2853 goto unregister_dev;
2855 dev_info(&dev->intf->dev,
2856 "Registered radio device as %s\n",
2857 video_device_node_name(&v4l2->radio_dev));
2860 /* Init entities at the Media Controller */
2861 em28xx_v4l2_create_entities(dev);
2863 #ifdef CONFIG_MEDIA_CONTROLLER
2864 ret = v4l2_mc_create_media_graph(dev->media_dev);
2866 dev_err(&dev->intf->dev,
2867 "failed to create media graph\n");
2868 em28xx_v4l2_media_release(dev);
2869 goto unregister_dev;
2873 dev_info(&dev->intf->dev,
2874 "V4L2 video device registered as %s\n",
2875 video_device_node_name(&v4l2->vdev));
2877 if (video_is_registered(&v4l2->vbi_dev))
2878 dev_info(&dev->intf->dev,
2879 "V4L2 VBI device registered as %s\n",
2880 video_device_node_name(&v4l2->vbi_dev));
2882 /* Save some power by putting tuner to sleep */
2883 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2885 /* initialize videobuf2 stuff */
2886 em28xx_vb2_setup(dev);
2888 dev_info(&dev->intf->dev,
2889 "V4L2 extension successfully initialized\n");
2891 kref_get(&dev->ref);
2893 mutex_unlock(&dev->lock);
2897 if (video_is_registered(&v4l2->radio_dev)) {
2898 dev_info(&dev->intf->dev,
2899 "V4L2 device %s deregistered\n",
2900 video_device_node_name(&v4l2->radio_dev));
2901 video_unregister_device(&v4l2->radio_dev);
2903 if (video_is_registered(&v4l2->vbi_dev)) {
2904 dev_info(&dev->intf->dev,
2905 "V4L2 device %s deregistered\n",
2906 video_device_node_name(&v4l2->vbi_dev));
2907 video_unregister_device(&v4l2->vbi_dev);
2909 if (video_is_registered(&v4l2->vdev)) {
2910 dev_info(&dev->intf->dev,
2911 "V4L2 device %s deregistered\n",
2912 video_device_node_name(&v4l2->vdev));
2913 video_unregister_device(&v4l2->vdev);
2916 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2917 v4l2_device_unregister(&v4l2->v4l2_dev);
2920 kref_put(&v4l2->ref, em28xx_free_v4l2);
2921 mutex_unlock(&dev->lock);
2925 static struct em28xx_ops v4l2_ops = {
2927 .name = "Em28xx v4l2 Extension",
2928 .init = em28xx_v4l2_init,
2929 .fini = em28xx_v4l2_fini,
2930 .suspend = em28xx_v4l2_suspend,
2931 .resume = em28xx_v4l2_resume,
2934 static int __init em28xx_video_register(void)
2936 return em28xx_register_extension(&v4l2_ops);
2939 static void __exit em28xx_video_unregister(void)
2941 em28xx_unregister_extension(&v4l2_ops);
2944 module_init(em28xx_video_register);
2945 module_exit(em28xx_video_unregister);