2 em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
5 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
6 Markus Rechberger <mrechberger@gmail.com>
7 Mauro Carvalho Chehab <mchehab@infradead.org>
8 Sascha Sommer <saschasommer@freenet.de>
9 Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com>
11 Some parts based on SN9C10x PC Camera Controllers GPL driver made
12 by Luca Risolia <luca.risolia@studio.unibo.it>
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 2 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program; if not, write to the Free Software
26 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #include <linux/init.h>
30 #include <linux/list.h>
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/bitmap.h>
34 #include <linux/usb.h>
35 #include <linux/i2c.h>
37 #include <linux/mutex.h>
38 #include <linux/slab.h>
41 #include "em28xx-v4l.h"
42 #include <media/v4l2-common.h>
43 #include <media/v4l2-ioctl.h>
44 #include <media/v4l2-event.h>
45 #include <media/v4l2-clk.h>
46 #include <media/msp3400.h>
47 #include <media/tuner.h>
49 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
50 "Markus Rechberger <mrechberger@gmail.com>, " \
51 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
52 "Sascha Sommer <saschasommer@freenet.de>"
54 static unsigned int isoc_debug;
55 module_param(isoc_debug, int, 0644);
56 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
58 static unsigned int disable_vbi;
59 module_param(disable_vbi, int, 0644);
60 MODULE_PARM_DESC(disable_vbi, "disable vbi support");
63 module_param(alt, int, 0644);
64 MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");
66 #define em28xx_videodbg(fmt, arg...) do {\
68 printk(KERN_INFO "%s %s :"fmt, \
69 dev->name, __func__ , ##arg); } while (0)
71 #define em28xx_isocdbg(fmt, arg...) \
74 printk(KERN_INFO "%s %s :"fmt, \
75 dev->name, __func__ , ##arg); \
79 MODULE_AUTHOR(DRIVER_AUTHOR);
80 MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface");
81 MODULE_LICENSE("GPL");
82 MODULE_VERSION(EM28XX_VERSION);
84 #define EM25XX_FRMDATAHDR_BYTE1 0x02
85 #define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE 0x20
86 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_END 0x02
87 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID 0x01
88 #define EM25XX_FRMDATAHDR_BYTE2_MASK (EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \
89 EM25XX_FRMDATAHDR_BYTE2_FRAME_END | \
90 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID)
92 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
93 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
94 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
96 module_param_array(video_nr, int, NULL, 0444);
97 module_param_array(vbi_nr, int, NULL, 0444);
98 module_param_array(radio_nr, int, NULL, 0444);
99 MODULE_PARM_DESC(video_nr, "video device numbers");
100 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
101 MODULE_PARM_DESC(radio_nr, "radio device numbers");
103 static unsigned int video_debug;
104 module_param(video_debug, int, 0644);
105 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
107 /* supported video standards */
108 static struct em28xx_fmt format[] = {
110 .name = "16 bpp YUY2, 4:2:2, packed",
111 .fourcc = V4L2_PIX_FMT_YUYV,
113 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V,
115 .name = "16 bpp RGB 565, LE",
116 .fourcc = V4L2_PIX_FMT_RGB565,
118 .reg = EM28XX_OUTFMT_RGB_16_656,
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;
147 if (dev->board.is_webcam)
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;
160 if (dev->board.is_webcam)
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)
175 if (dev->board.is_webcam)
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);
199 v4l2_device_call_all(v4l2_dev, 0, video, s_stream, 0);
202 static int em28xx_colorlevels_set_default(struct em28xx *dev)
204 em28xx_write_reg(dev, EM28XX_R20_YGAIN, CONTRAST_DEFAULT);
205 em28xx_write_reg(dev, EM28XX_R21_YOFFSET, BRIGHTNESS_DEFAULT);
206 em28xx_write_reg(dev, EM28XX_R22_UVGAIN, SATURATION_DEFAULT);
207 em28xx_write_reg(dev, EM28XX_R23_UOFFSET, BLUE_BALANCE_DEFAULT);
208 em28xx_write_reg(dev, EM28XX_R24_VOFFSET, RED_BALANCE_DEFAULT);
209 em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, SHARPNESS_DEFAULT);
211 em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20);
212 em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20);
213 em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20);
214 em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20);
215 em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00);
216 em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00);
217 return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00);
220 static int em28xx_set_outfmt(struct em28xx *dev)
224 struct em28xx_v4l2 *v4l2 = dev->v4l2;
226 fmt = v4l2->format->reg;
230 * NOTE: it's not clear if this is really needed !
231 * The datasheets say bit 5 is a reserved bit and devices seem to work
232 * fine without it. But the Windows driver sets it for em2710/50+em28xx
233 * devices and we've always been setting it, too.
235 * em2765 (em25xx, em276x/7x/8x) devices do NOT work with this bit set,
236 * it's likely used for an additional (compressed ?) format there.
238 ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt);
242 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, v4l2->vinmode);
246 vinctrl = v4l2->vinctl;
247 if (em28xx_vbi_supported(dev) == 1) {
248 vinctrl |= EM28XX_VINCTRL_VBI_RAW;
249 em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00);
250 em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH, 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);
320 /* it seems that both H and V scalers must be active
322 mode = (h || v) ? 0x30 : 0x00;
324 return em28xx_write_reg(dev, EM28XX_R26_COMPR, mode);
327 /* FIXME: this only function read values from dev */
328 static int em28xx_resolution_set(struct em28xx *dev)
330 struct em28xx_v4l2 *v4l2 = dev->v4l2;
331 int width = norm_maxw(dev);
332 int height = norm_maxh(dev);
334 /* Properly setup VBI */
335 v4l2->vbi_width = 720;
336 if (v4l2->norm & V4L2_STD_525_60)
337 v4l2->vbi_height = 12;
339 v4l2->vbi_height = 18;
341 em28xx_set_outfmt(dev);
343 em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2);
345 /* If we don't set the start position to 2 in VBI mode, we end up
346 with line 20/21 being YUYV encoded instead of being in 8-bit
347 greyscale. The core of the issue is that line 21 (and line 23 for
348 PAL WSS) are inside of active video region, and as a result they
349 get the pixelformatting associated with that area. So by cropping
350 it out, we end up with the same format as the rest of the VBI
352 if (em28xx_vbi_supported(dev) == 1)
353 em28xx_capture_area_set(dev, 0, 2, width, height);
355 em28xx_capture_area_set(dev, 0, 0, width, height);
357 return em28xx_scaler_set(dev, v4l2->hscale, v4l2->vscale);
360 /* Set USB alternate setting for analog video */
361 static int em28xx_set_alternate(struct em28xx *dev)
363 struct em28xx_v4l2 *v4l2 = dev->v4l2;
366 unsigned int min_pkt_size = v4l2->width * 2 + 4;
368 /* NOTE: for isoc transfers, only alt settings > 0 are allowed
369 bulk transfers seem to work only with alt=0 ! */
371 if ((alt > 0) && (alt < dev->num_alt)) {
372 em28xx_videodbg("alternate forced to %d\n", dev->alt);
376 if (dev->analog_xfer_bulk)
379 /* When image size is bigger than a certain value,
380 the frame size should be increased, otherwise, only
381 green screen will be received.
383 if (v4l2->width * 2 * v4l2->height > 720 * 240 * 2)
386 for (i = 0; i < dev->num_alt; i++) {
387 /* stop when the selected alt setting offers enough bandwidth */
388 if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) {
391 /* otherwise make sure that we end up with the maximum bandwidth
392 because the min_pkt_size equation might be wrong...
394 } else if (dev->alt_max_pkt_size_isoc[i] >
395 dev->alt_max_pkt_size_isoc[dev->alt])
400 /* NOTE: for bulk transfers, we need to call usb_set_interface()
401 * even if the previous settings were the same. Otherwise streaming
402 * fails with all urbs having status = -EOVERFLOW ! */
403 if (dev->analog_xfer_bulk) {
404 dev->max_pkt_size = 512; /* USB 2.0 spec */
405 dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER;
407 em28xx_videodbg("minimum isoc packet size: %u (alt=%d)\n",
408 min_pkt_size, dev->alt);
410 dev->alt_max_pkt_size_isoc[dev->alt];
411 dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS;
413 em28xx_videodbg("setting alternate %d with wMaxPacketSize=%u\n",
414 dev->alt, dev->max_pkt_size);
415 errCode = usb_set_interface(dev->udev, dev->ifnum, dev->alt);
417 em28xx_errdev("cannot change alternate number to %d (error=%i)\n",
424 /* ------------------------------------------------------------------
425 DMA and thread functions
426 ------------------------------------------------------------------*/
429 * Finish the current buffer
431 static inline void finish_buffer(struct em28xx *dev,
432 struct em28xx_buffer *buf)
434 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
436 buf->vb.sequence = dev->v4l2->field_count++;
437 if (dev->v4l2->progressive)
438 buf->vb.field = V4L2_FIELD_NONE;
440 buf->vb.field = V4L2_FIELD_INTERLACED;
441 v4l2_get_timestamp(&buf->vb.timestamp);
443 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
447 * Copy picture data from USB buffer to videobuf buffer
449 static void em28xx_copy_video(struct em28xx *dev,
450 struct em28xx_buffer *buf,
451 unsigned char *usb_buf,
454 struct em28xx_v4l2 *v4l2 = dev->v4l2;
455 void *fieldstart, *startwrite, *startread;
456 int linesdone, currlinedone, offset, lencopy, remain;
457 int bytesperline = v4l2->width << 1;
459 if (buf->pos + len > buf->length)
460 len = buf->length - buf->pos;
465 if (v4l2->progressive || buf->top_field)
466 fieldstart = buf->vb_buf;
467 else /* interlaced mode, even nr. of lines */
468 fieldstart = buf->vb_buf + bytesperline;
470 linesdone = buf->pos / bytesperline;
471 currlinedone = buf->pos % bytesperline;
473 if (v4l2->progressive)
474 offset = linesdone * bytesperline + currlinedone;
476 offset = linesdone * bytesperline * 2 + currlinedone;
478 startwrite = fieldstart + offset;
479 lencopy = bytesperline - currlinedone;
480 lencopy = lencopy > remain ? remain : lencopy;
482 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) {
483 em28xx_isocdbg("Overflow of %zu bytes past buffer end (1)\n",
484 ((char *)startwrite + lencopy) -
485 ((char *)buf->vb_buf + buf->length));
486 remain = (char *)buf->vb_buf + buf->length -
492 memcpy(startwrite, startread, lencopy);
497 if (v4l2->progressive)
498 startwrite += lencopy;
500 startwrite += lencopy + bytesperline;
501 startread += lencopy;
502 if (bytesperline > remain)
505 lencopy = bytesperline;
507 if ((char *)startwrite + lencopy > (char *)buf->vb_buf +
509 em28xx_isocdbg("Overflow of %zu bytes past buffer end"
511 ((char *)startwrite + lencopy) -
512 ((char *)buf->vb_buf + buf->length));
513 lencopy = remain = (char *)buf->vb_buf + buf->length -
519 memcpy(startwrite, startread, lencopy);
528 * Copy VBI data from USB buffer to videobuf buffer
530 static void em28xx_copy_vbi(struct em28xx *dev,
531 struct em28xx_buffer *buf,
532 unsigned char *usb_buf,
537 if (buf->pos + len > buf->length)
538 len = buf->length - buf->pos;
541 /* Make sure the bottom field populates the second half of the frame */
542 if (buf->top_field == 0)
543 offset += dev->v4l2->vbi_width * dev->v4l2->vbi_height;
545 memcpy(buf->vb_buf + offset, usb_buf, len);
549 static inline void print_err_status(struct em28xx *dev,
550 int packet, int status)
552 char *errmsg = "Unknown";
556 errmsg = "unlinked synchronuously";
559 errmsg = "unlinked asynchronuously";
562 errmsg = "Buffer error (overrun)";
565 errmsg = "Stalled (device not responding)";
568 errmsg = "Babble (bad cable?)";
571 errmsg = "Bit-stuff error (bad cable?)";
574 errmsg = "CRC/Timeout (could be anything)";
577 errmsg = "Device does not respond";
581 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
583 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
584 packet, status, errmsg);
589 * get the next available buffer from dma queue
591 static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev,
592 struct em28xx_dmaqueue *dma_q)
594 struct em28xx_buffer *buf;
596 if (list_empty(&dma_q->active)) {
597 em28xx_isocdbg("No active queue to serve\n");
601 /* Get the next buffer */
602 buf = list_entry(dma_q->active.next, struct em28xx_buffer, list);
603 /* Cleans up buffer - Useful for testing for frame/URB loss */
604 list_del(&buf->list);
606 buf->vb_buf = buf->mem;
612 * Finish the current buffer if completed and prepare for the next field
614 static struct em28xx_buffer *
615 finish_field_prepare_next(struct em28xx *dev,
616 struct em28xx_buffer *buf,
617 struct em28xx_dmaqueue *dma_q)
619 struct em28xx_v4l2 *v4l2 = dev->v4l2;
621 if (v4l2->progressive || v4l2->top_field) { /* Brand new frame */
623 finish_buffer(dev, buf);
624 buf = get_next_buf(dev, dma_q);
627 buf->top_field = v4l2->top_field;
635 * Process data packet according to the em2710/em2750/em28xx frame data format
637 static inline void process_frame_data_em28xx(struct em28xx *dev,
638 unsigned char *data_pkt,
639 unsigned int data_len)
641 struct em28xx_v4l2 *v4l2 = dev->v4l2;
642 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
643 struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf;
644 struct em28xx_dmaqueue *dma_q = &dev->vidq;
645 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
647 /* capture type 0 = vbi start
648 capture type 1 = vbi in progress
649 capture type 2 = video start
650 capture type 3 = video in progress */
652 /* NOTE: Headers are always 4 bytes and
653 * 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);
676 /* NOTE: With bulk transfers, intermediate data packets
677 * have no continuation header */
679 if (v4l2->capture_type == 0) {
680 vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q);
681 dev->usb_ctl.vbi_buf = vbi_buf;
682 v4l2->capture_type = 1;
685 if (v4l2->capture_type == 1) {
686 int vbi_size = v4l2->vbi_width * v4l2->vbi_height;
687 int vbi_data_len = ((v4l2->vbi_read + data_len) > vbi_size) ?
688 (vbi_size - v4l2->vbi_read) : data_len;
692 em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len);
693 v4l2->vbi_read += vbi_data_len;
695 if (vbi_data_len < data_len) {
696 /* Continue with copying video data */
697 v4l2->capture_type = 2;
698 data_pkt += vbi_data_len;
699 data_len -= vbi_data_len;
703 if (v4l2->capture_type == 2) {
704 buf = finish_field_prepare_next(dev, buf, dma_q);
705 dev->usb_ctl.vid_buf = buf;
706 v4l2->capture_type = 3;
709 if (v4l2->capture_type == 3 && buf != NULL && data_len > 0)
710 em28xx_copy_video(dev, buf, data_pkt, data_len);
714 * Process data packet according to the em25xx/em276x/7x/8x frame data format
716 static inline void process_frame_data_em25xx(struct em28xx *dev,
717 unsigned char *data_pkt,
718 unsigned int data_len)
720 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
721 struct em28xx_dmaqueue *dmaq = &dev->vidq;
722 struct em28xx_v4l2 *v4l2 = dev->v4l2;
723 bool frame_end = false;
725 /* Check for header */
726 /* NOTE: at least with bulk transfers, only the first packet
727 * has a header and has always set the FRAME_END bit */
728 if (data_len >= 2) { /* em25xx header is only 2 bytes long */
729 if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) &&
730 ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) {
731 v4l2->top_field = !(data_pkt[1] &
732 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID);
733 frame_end = data_pkt[1] &
734 EM25XX_FRMDATAHDR_BYTE2_FRAME_END;
739 /* Finish field and prepare next (BULK only) */
740 if (dev->analog_xfer_bulk && frame_end) {
741 buf = finish_field_prepare_next(dev, buf, dmaq);
742 dev->usb_ctl.vid_buf = buf;
744 /* NOTE: in ISOC mode when a new frame starts and buf==NULL,
745 * we COULD already prepare a buffer here to avoid skipping the
751 if (buf != NULL && data_len > 0)
752 em28xx_copy_video(dev, buf, data_pkt, data_len);
754 /* Finish frame (ISOC only) => avoids lag of 1 frame */
755 if (!dev->analog_xfer_bulk && frame_end) {
756 buf = finish_field_prepare_next(dev, buf, dmaq);
757 dev->usb_ctl.vid_buf = buf;
760 /* NOTE: Tested with USB bulk transfers only !
761 * The wording in the datasheet suggests that isoc might work different.
762 * The current code assumes that with isoc transfers each packet has a
763 * header like with the other em28xx devices.
765 /* NOTE: Support for interlaced mode is pure theory. It has not been
766 * tested and it is unknown if these devices actually support it. */
767 /* NOTE: No VBI support yet (these chips likely do not support VBI). */
770 /* Processes and copies the URB data content (video and VBI data) */
771 static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb)
773 int xfer_bulk, num_packets, i;
774 unsigned char *usb_data_pkt;
775 unsigned int usb_data_len;
780 if (dev->disconnected)
784 print_err_status(dev, -1, urb->status);
786 xfer_bulk = usb_pipebulk(urb->pipe);
788 if (xfer_bulk) /* bulk */
791 num_packets = urb->number_of_packets;
793 for (i = 0; i < num_packets; i++) {
794 if (xfer_bulk) { /* bulk */
795 usb_data_len = urb->actual_length;
797 usb_data_pkt = urb->transfer_buffer;
799 if (urb->iso_frame_desc[i].status < 0) {
800 print_err_status(dev, i,
801 urb->iso_frame_desc[i].status);
802 if (urb->iso_frame_desc[i].status != -EPROTO)
806 usb_data_len = urb->iso_frame_desc[i].actual_length;
807 if (usb_data_len > dev->max_pkt_size) {
808 em28xx_isocdbg("packet bigger than packet size");
812 usb_data_pkt = urb->transfer_buffer +
813 urb->iso_frame_desc[i].offset;
816 if (usb_data_len == 0) {
817 /* NOTE: happens very often with isoc transfers */
818 /* em28xx_usbdbg("packet %d is empty",i); - spammy */
823 process_frame_data_em25xx(dev,
824 usb_data_pkt, usb_data_len);
826 process_frame_data_em28xx(dev,
827 usb_data_pkt, usb_data_len);
833 static int get_ressource(enum v4l2_buf_type f_type)
836 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
837 return EM28XX_RESOURCE_VIDEO;
838 case V4L2_BUF_TYPE_VBI_CAPTURE:
839 return EM28XX_RESOURCE_VBI;
845 /* Usage lock check functions */
846 static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type)
848 int res_type = get_ressource(f_type);
851 if (dev->resources & res_type) {
852 /* no, someone else uses it */
856 /* it's free, grab it */
857 dev->resources |= res_type;
858 em28xx_videodbg("res: get %d\n", res_type);
862 static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type)
864 int res_type = get_ressource(f_type);
866 dev->resources &= ~res_type;
867 em28xx_videodbg("res: put %d\n", res_type);
870 /* ------------------------------------------------------------------
872 ------------------------------------------------------------------*/
874 static int queue_setup(struct vb2_queue *vq, const void *parg,
875 unsigned int *nbuffers, unsigned int *nplanes,
876 unsigned int sizes[], void *alloc_ctxs[])
878 const struct v4l2_format *fmt = parg;
879 struct em28xx *dev = vb2_get_drv_priv(vq);
880 struct em28xx_v4l2 *v4l2 = dev->v4l2;
884 size = fmt->fmt.pix.sizeimage;
887 (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;
902 buffer_prepare(struct vb2_buffer *vb)
904 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
905 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
906 struct em28xx_v4l2 *v4l2 = dev->v4l2;
909 em28xx_videodbg("%s, field=%d\n", __func__, vbuf->field);
911 size = (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;
913 if (vb2_plane_size(vb, 0) < size) {
914 em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n",
915 __func__, vb2_plane_size(vb, 0), size);
918 vb2_set_plane_payload(vb, 0, size);
923 int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
925 struct em28xx *dev = vb2_get_drv_priv(vq);
926 struct em28xx_v4l2 *v4l2 = dev->v4l2;
927 struct v4l2_frequency f;
928 struct v4l2_fh *owner;
931 em28xx_videodbg("%s\n", __func__);
933 /* Make sure streaming is not already in progress for this type
934 of filehandle (e.g. video, vbi) */
935 rc = res_get(dev, vq->type);
939 if (v4l2->streaming_users == 0) {
940 /* First active streaming user, so allocate all the URBs */
942 /* Allocate the USB bandwidth */
943 em28xx_set_alternate(dev);
945 /* Needed, since GPIO might have disabled power of
948 em28xx_wake_i2c(dev);
950 v4l2->capture_type = -1;
951 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE,
952 dev->analog_xfer_bulk,
955 dev->packet_multiplier,
956 em28xx_urb_data_copy);
961 * djh: it's not clear whether this code is still needed. I'm
962 * leaving it in here for now entirely out of concern for
963 * backward compatibility (the old code did it)
966 /* Ask tuner to go to analog or radio mode */
967 memset(&f, 0, sizeof(f));
968 f.frequency = v4l2->frequency;
969 owner = (struct v4l2_fh *)vq->owner;
970 if (owner && owner->vdev->vfl_type == VFL_TYPE_RADIO)
971 f.type = V4L2_TUNER_RADIO;
973 f.type = V4L2_TUNER_ANALOG_TV;
974 v4l2_device_call_all(&v4l2->v4l2_dev,
975 0, tuner, s_frequency, &f);
978 v4l2->streaming_users++;
983 static void em28xx_stop_streaming(struct vb2_queue *vq)
985 struct em28xx *dev = vb2_get_drv_priv(vq);
986 struct em28xx_v4l2 *v4l2 = dev->v4l2;
987 struct em28xx_dmaqueue *vidq = &dev->vidq;
988 unsigned long flags = 0;
990 em28xx_videodbg("%s\n", __func__);
992 res_free(dev, vq->type);
994 if (v4l2->streaming_users-- == 1) {
995 /* Last active user, so shutdown all the URBS */
996 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
999 spin_lock_irqsave(&dev->slock, flags);
1000 if (dev->usb_ctl.vid_buf != NULL) {
1001 vb2_buffer_done(&dev->usb_ctl.vid_buf->vb.vb2_buf,
1002 VB2_BUF_STATE_ERROR);
1003 dev->usb_ctl.vid_buf = NULL;
1005 while (!list_empty(&vidq->active)) {
1006 struct em28xx_buffer *buf;
1008 buf = list_entry(vidq->active.next, struct em28xx_buffer, list);
1009 list_del(&buf->list);
1010 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1012 spin_unlock_irqrestore(&dev->slock, flags);
1015 void em28xx_stop_vbi_streaming(struct vb2_queue *vq)
1017 struct em28xx *dev = vb2_get_drv_priv(vq);
1018 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1019 struct em28xx_dmaqueue *vbiq = &dev->vbiq;
1020 unsigned long flags = 0;
1022 em28xx_videodbg("%s\n", __func__);
1024 res_free(dev, vq->type);
1026 if (v4l2->streaming_users-- == 1) {
1027 /* Last active user, so shutdown all the URBS */
1028 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1031 spin_lock_irqsave(&dev->slock, flags);
1032 if (dev->usb_ctl.vbi_buf != NULL) {
1033 vb2_buffer_done(&dev->usb_ctl.vbi_buf->vb.vb2_buf,
1034 VB2_BUF_STATE_ERROR);
1035 dev->usb_ctl.vbi_buf = NULL;
1037 while (!list_empty(&vbiq->active)) {
1038 struct em28xx_buffer *buf;
1040 buf = list_entry(vbiq->active.next, struct em28xx_buffer, list);
1041 list_del(&buf->list);
1042 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1044 spin_unlock_irqrestore(&dev->slock, flags);
1048 buffer_queue(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_buffer *buf =
1053 container_of(vbuf, struct em28xx_buffer, vb);
1054 struct em28xx_dmaqueue *vidq = &dev->vidq;
1055 unsigned long flags = 0;
1057 em28xx_videodbg("%s\n", __func__);
1058 buf->mem = vb2_plane_vaddr(vb, 0);
1059 buf->length = vb2_plane_size(vb, 0);
1061 spin_lock_irqsave(&dev->slock, flags);
1062 list_add_tail(&buf->list, &vidq->active);
1063 spin_unlock_irqrestore(&dev->slock, flags);
1066 static struct vb2_ops em28xx_video_qops = {
1067 .queue_setup = queue_setup,
1068 .buf_prepare = buffer_prepare,
1069 .buf_queue = buffer_queue,
1070 .start_streaming = em28xx_start_analog_streaming,
1071 .stop_streaming = em28xx_stop_streaming,
1072 .wait_prepare = vb2_ops_wait_prepare,
1073 .wait_finish = vb2_ops_wait_finish,
1076 static int em28xx_vb2_setup(struct em28xx *dev)
1079 struct vb2_queue *q;
1080 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1082 /* Setup Videobuf2 for Video capture */
1084 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1085 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1086 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1088 q->buf_struct_size = sizeof(struct em28xx_buffer);
1089 q->ops = &em28xx_video_qops;
1090 q->mem_ops = &vb2_vmalloc_memops;
1092 rc = vb2_queue_init(q);
1096 /* Setup Videobuf2 for VBI capture */
1098 q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1099 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
1100 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1102 q->buf_struct_size = sizeof(struct em28xx_buffer);
1103 q->ops = &em28xx_vbi_qops;
1104 q->mem_ops = &vb2_vmalloc_memops;
1106 rc = vb2_queue_init(q);
1113 /********************* v4l2 interface **************************************/
1115 static void video_mux(struct em28xx *dev, int index)
1117 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
1119 dev->ctl_input = index;
1120 dev->ctl_ainput = INPUT(index)->amux;
1121 dev->ctl_aoutput = INPUT(index)->aout;
1123 if (!dev->ctl_aoutput)
1124 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1126 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
1127 INPUT(index)->vmux, 0, 0);
1129 if (dev->board.has_msp34xx) {
1130 if (dev->i2s_speed) {
1131 v4l2_device_call_all(v4l2_dev, 0, audio,
1132 s_i2s_clock_freq, dev->i2s_speed);
1134 /* Note: this is msp3400 specific */
1135 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1137 MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
1140 if (dev->board.adecoder != EM28XX_NOADECODER) {
1141 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1142 dev->ctl_ainput, dev->ctl_aoutput, 0);
1145 em28xx_audio_analog_set(dev);
1148 static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv)
1150 struct em28xx *dev = priv;
1153 * In the case of non-AC97 volume controls, we still need
1154 * to do some setups at em28xx, in order to mute/unmute
1155 * and to adjust audio volume. However, the value ranges
1156 * should be checked by the corresponding V4L subdriver.
1159 case V4L2_CID_AUDIO_MUTE:
1160 dev->mute = ctrl->val;
1161 em28xx_audio_analog_set(dev);
1163 case V4L2_CID_AUDIO_VOLUME:
1164 dev->volume = ctrl->val;
1165 em28xx_audio_analog_set(dev);
1170 static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl)
1172 struct em28xx_v4l2 *v4l2 =
1173 container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler);
1174 struct em28xx *dev = v4l2->dev;
1178 case V4L2_CID_AUDIO_MUTE:
1179 dev->mute = ctrl->val;
1180 ret = em28xx_audio_analog_set(dev);
1182 case V4L2_CID_AUDIO_VOLUME:
1183 dev->volume = ctrl->val;
1184 ret = em28xx_audio_analog_set(dev);
1186 case V4L2_CID_CONTRAST:
1187 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val);
1189 case V4L2_CID_BRIGHTNESS:
1190 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val);
1192 case V4L2_CID_SATURATION:
1193 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val);
1195 case V4L2_CID_BLUE_BALANCE:
1196 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val);
1198 case V4L2_CID_RED_BALANCE:
1199 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val);
1201 case V4L2_CID_SHARPNESS:
1202 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val);
1206 return (ret < 0) ? ret : 0;
1209 static const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
1210 .s_ctrl = em28xx_s_ctrl,
1213 static void size_to_scale(struct em28xx *dev,
1214 unsigned int width, unsigned int height,
1215 unsigned int *hscale, unsigned int *vscale)
1217 unsigned int maxw = norm_maxw(dev);
1218 unsigned int maxh = norm_maxh(dev);
1220 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1221 if (*hscale > EM28XX_HVSCALE_MAX)
1222 *hscale = EM28XX_HVSCALE_MAX;
1224 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1225 if (*vscale > EM28XX_HVSCALE_MAX)
1226 *vscale = EM28XX_HVSCALE_MAX;
1229 static void scale_to_size(struct em28xx *dev,
1230 unsigned int hscale, unsigned int vscale,
1231 unsigned int *width, unsigned int *height)
1233 unsigned int maxw = norm_maxw(dev);
1234 unsigned int maxh = norm_maxh(dev);
1236 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1237 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1240 /* ------------------------------------------------------------------
1241 IOCTL vidioc handling
1242 ------------------------------------------------------------------*/
1244 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1245 struct v4l2_format *f)
1247 struct em28xx *dev = video_drvdata(file);
1248 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1250 f->fmt.pix.width = v4l2->width;
1251 f->fmt.pix.height = v4l2->height;
1252 f->fmt.pix.pixelformat = v4l2->format->fourcc;
1253 f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3;
1254 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height;
1255 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1257 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1258 if (v4l2->progressive)
1259 f->fmt.pix.field = V4L2_FIELD_NONE;
1261 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1262 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1266 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1270 for (i = 0; i < ARRAY_SIZE(format); i++)
1271 if (format[i].fourcc == fourcc)
1277 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1278 struct v4l2_format *f)
1280 struct em28xx *dev = video_drvdata(file);
1281 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1282 unsigned int width = f->fmt.pix.width;
1283 unsigned int height = f->fmt.pix.height;
1284 unsigned int maxw = norm_maxw(dev);
1285 unsigned int maxh = norm_maxh(dev);
1286 unsigned int hscale, vscale;
1287 struct em28xx_fmt *fmt;
1289 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1291 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1292 f->fmt.pix.pixelformat);
1296 if (dev->board.is_em2800) {
1297 /* the em2800 can only scale down to 50% */
1298 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1299 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1301 * MaxPacketSize for em2800 is too small to capture at full
1302 * resolution use half of maxw as the scaler can only scale
1305 if (width == maxw && height == maxh)
1308 /* width must even because of the YUYV format
1309 height must be even because of interlacing */
1310 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1314 size_to_scale(dev, width, height, &hscale, &vscale);
1315 scale_to_size(dev, hscale, vscale, &width, &height);
1317 f->fmt.pix.width = width;
1318 f->fmt.pix.height = height;
1319 f->fmt.pix.pixelformat = fmt->fourcc;
1320 f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
1321 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1322 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1323 if (v4l2->progressive)
1324 f->fmt.pix.field = V4L2_FIELD_NONE;
1326 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1327 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1328 f->fmt.pix.priv = 0;
1333 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1334 unsigned width, unsigned height)
1336 struct em28xx_fmt *fmt;
1337 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1339 fmt = format_by_fourcc(fourcc);
1344 v4l2->width = width;
1345 v4l2->height = height;
1347 /* set new image size */
1348 size_to_scale(dev, v4l2->width, v4l2->height,
1349 &v4l2->hscale, &v4l2->vscale);
1351 em28xx_resolution_set(dev);
1356 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1357 struct v4l2_format *f)
1359 struct em28xx *dev = video_drvdata(file);
1360 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1362 if (vb2_is_busy(&v4l2->vb_vidq))
1365 vidioc_try_fmt_vid_cap(file, priv, f);
1367 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1368 f->fmt.pix.width, f->fmt.pix.height);
1371 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1373 struct em28xx *dev = video_drvdata(file);
1375 *norm = dev->v4l2->norm;
1380 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
1382 struct em28xx *dev = video_drvdata(file);
1384 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm);
1389 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
1391 struct em28xx *dev = video_drvdata(file);
1392 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1393 struct v4l2_format f;
1395 if (norm == v4l2->norm)
1398 if (v4l2->streaming_users > 0)
1403 /* Adjusts width/height, if needed */
1404 f.fmt.pix.width = 720;
1405 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576;
1406 vidioc_try_fmt_vid_cap(file, priv, &f);
1408 /* set new image size */
1409 v4l2->width = f.fmt.pix.width;
1410 v4l2->height = f.fmt.pix.height;
1411 size_to_scale(dev, v4l2->width, v4l2->height,
1412 &v4l2->hscale, &v4l2->vscale);
1414 em28xx_resolution_set(dev);
1415 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
1420 static int vidioc_g_parm(struct file *file, void *priv,
1421 struct v4l2_streamparm *p)
1423 struct em28xx *dev = video_drvdata(file);
1424 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1427 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1428 if (dev->board.is_webcam)
1429 rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0,
1432 v4l2_video_std_frame_period(v4l2->norm,
1433 &p->parm.capture.timeperframe);
1438 static int vidioc_s_parm(struct file *file, void *priv,
1439 struct v4l2_streamparm *p)
1441 struct em28xx *dev = video_drvdata(file);
1443 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1444 return v4l2_device_call_until_err(&dev->v4l2->v4l2_dev,
1445 0, video, s_parm, p);
1448 static const char *iname[] = {
1449 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1450 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1451 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1452 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1453 [EM28XX_VMUX_SVIDEO] = "S-Video",
1454 [EM28XX_VMUX_TELEVISION] = "Television",
1455 [EM28XX_VMUX_CABLE] = "Cable TV",
1456 [EM28XX_VMUX_DVB] = "DVB",
1457 [EM28XX_VMUX_DEBUG] = "for debug only",
1460 static int vidioc_enum_input(struct file *file, void *priv,
1461 struct v4l2_input *i)
1463 struct em28xx *dev = video_drvdata(file);
1467 if (n >= MAX_EM28XX_INPUT)
1469 if (0 == INPUT(n)->type)
1473 i->type = V4L2_INPUT_TYPE_CAMERA;
1475 strcpy(i->name, iname[INPUT(n)->type]);
1477 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1478 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1479 i->type = V4L2_INPUT_TYPE_TUNER;
1481 i->std = dev->v4l2->vdev.tvnorms;
1482 /* webcams do not have the STD API */
1483 if (dev->board.is_webcam)
1484 i->capabilities = 0;
1489 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1491 struct em28xx *dev = video_drvdata(file);
1493 *i = dev->ctl_input;
1498 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1500 struct em28xx *dev = video_drvdata(file);
1502 if (i >= MAX_EM28XX_INPUT)
1504 if (0 == INPUT(i)->type)
1511 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1513 struct em28xx *dev = video_drvdata(file);
1516 case EM28XX_AMUX_VIDEO:
1517 strcpy(a->name, "Television");
1519 case EM28XX_AMUX_LINE_IN:
1520 strcpy(a->name, "Line In");
1522 case EM28XX_AMUX_VIDEO2:
1523 strcpy(a->name, "Television alt");
1525 case EM28XX_AMUX_PHONE:
1526 strcpy(a->name, "Phone");
1528 case EM28XX_AMUX_MIC:
1529 strcpy(a->name, "Mic");
1531 case EM28XX_AMUX_CD:
1532 strcpy(a->name, "CD");
1534 case EM28XX_AMUX_AUX:
1535 strcpy(a->name, "Aux");
1537 case EM28XX_AMUX_PCM_OUT:
1538 strcpy(a->name, "PCM");
1544 a->index = dev->ctl_ainput;
1545 a->capability = V4L2_AUDCAP_STEREO;
1550 static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a)
1552 struct em28xx *dev = video_drvdata(file);
1554 if (a->index >= MAX_EM28XX_INPUT)
1556 if (0 == INPUT(a->index)->type)
1559 dev->ctl_ainput = INPUT(a->index)->amux;
1560 dev->ctl_aoutput = INPUT(a->index)->aout;
1562 if (!dev->ctl_aoutput)
1563 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1568 static int vidioc_g_tuner(struct file *file, void *priv,
1569 struct v4l2_tuner *t)
1571 struct em28xx *dev = video_drvdata(file);
1576 strcpy(t->name, "Tuner");
1578 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
1582 static int vidioc_s_tuner(struct file *file, void *priv,
1583 const struct v4l2_tuner *t)
1585 struct em28xx *dev = video_drvdata(file);
1590 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
1594 static int vidioc_g_frequency(struct file *file, void *priv,
1595 struct v4l2_frequency *f)
1597 struct em28xx *dev = video_drvdata(file);
1598 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1603 f->frequency = v4l2->frequency;
1607 static int vidioc_s_frequency(struct file *file, void *priv,
1608 const struct v4l2_frequency *f)
1610 struct v4l2_frequency new_freq = *f;
1611 struct em28xx *dev = video_drvdata(file);
1612 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1617 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f);
1618 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq);
1619 v4l2->frequency = new_freq.frequency;
1624 #ifdef CONFIG_VIDEO_ADV_DEBUG
1625 static int vidioc_g_chip_info(struct file *file, void *priv,
1626 struct v4l2_dbg_chip_info *chip)
1628 struct em28xx *dev = video_drvdata(file);
1630 if (chip->match.addr > 1)
1632 if (chip->match.addr == 1)
1633 strlcpy(chip->name, "ac97", sizeof(chip->name));
1636 dev->v4l2->v4l2_dev.name, sizeof(chip->name));
1640 static int em28xx_reg_len(int reg)
1643 case EM28XX_R40_AC97LSB:
1644 case EM28XX_R30_HSCALELOW:
1645 case EM28XX_R32_VSCALELOW:
1652 static int vidioc_g_register(struct file *file, void *priv,
1653 struct v4l2_dbg_register *reg)
1655 struct em28xx *dev = video_drvdata(file);
1658 if (reg->match.addr > 1)
1660 if (reg->match.addr) {
1661 ret = em28xx_read_ac97(dev, reg->reg);
1671 reg->size = em28xx_reg_len(reg->reg);
1672 if (reg->size == 1) {
1673 ret = em28xx_read_reg(dev, reg->reg);
1682 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1683 reg->reg, (char *)&val, 2);
1687 reg->val = le16_to_cpu(val);
1693 static int vidioc_s_register(struct file *file, void *priv,
1694 const struct v4l2_dbg_register *reg)
1696 struct em28xx *dev = video_drvdata(file);
1699 if (reg->match.addr > 1)
1701 if (reg->match.addr)
1702 return em28xx_write_ac97(dev, reg->reg, reg->val);
1705 buf = cpu_to_le16(reg->val);
1707 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1708 em28xx_reg_len(reg->reg));
1712 static int vidioc_querycap(struct file *file, void *priv,
1713 struct v4l2_capability *cap)
1715 struct video_device *vdev = video_devdata(file);
1716 struct em28xx *dev = video_drvdata(file);
1717 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1719 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1720 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1721 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1723 if (vdev->vfl_type == VFL_TYPE_GRABBER)
1724 cap->device_caps = V4L2_CAP_READWRITE |
1725 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1726 else if (vdev->vfl_type == VFL_TYPE_RADIO)
1727 cap->device_caps = V4L2_CAP_RADIO;
1729 cap->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE;
1731 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
1732 cap->device_caps |= V4L2_CAP_AUDIO;
1734 if (dev->tuner_type != TUNER_ABSENT)
1735 cap->device_caps |= V4L2_CAP_TUNER;
1737 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS |
1738 V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1739 if (video_is_registered(&v4l2->vbi_dev))
1740 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1741 if (video_is_registered(&v4l2->radio_dev))
1742 cap->capabilities |= V4L2_CAP_RADIO;
1746 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1747 struct v4l2_fmtdesc *f)
1749 if (unlikely(f->index >= ARRAY_SIZE(format)))
1752 strlcpy(f->description, format[f->index].name, sizeof(f->description));
1753 f->pixelformat = format[f->index].fourcc;
1758 static int vidioc_enum_framesizes(struct file *file, void *priv,
1759 struct v4l2_frmsizeenum *fsize)
1761 struct em28xx *dev = video_drvdata(file);
1762 struct em28xx_fmt *fmt;
1763 unsigned int maxw = norm_maxw(dev);
1764 unsigned int maxh = norm_maxh(dev);
1766 fmt = format_by_fourcc(fsize->pixel_format);
1768 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1769 fsize->pixel_format);
1773 if (dev->board.is_em2800) {
1774 if (fsize->index > 1)
1776 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1777 fsize->discrete.width = maxw / (1 + fsize->index);
1778 fsize->discrete.height = maxh / (1 + fsize->index);
1782 if (fsize->index != 0)
1785 /* Report a continuous range */
1786 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
1787 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
1788 &fsize->stepwise.min_width, &fsize->stepwise.min_height);
1789 if (fsize->stepwise.min_width < 48)
1790 fsize->stepwise.min_width = 48;
1791 if (fsize->stepwise.min_height < 38)
1792 fsize->stepwise.min_height = 38;
1793 fsize->stepwise.max_width = maxw;
1794 fsize->stepwise.max_height = maxh;
1795 fsize->stepwise.step_width = 1;
1796 fsize->stepwise.step_height = 1;
1800 /* RAW VBI ioctls */
1802 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1803 struct v4l2_format *format)
1805 struct em28xx *dev = video_drvdata(file);
1806 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1808 format->fmt.vbi.samples_per_line = v4l2->vbi_width;
1809 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1810 format->fmt.vbi.offset = 0;
1811 format->fmt.vbi.flags = 0;
1812 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1813 format->fmt.vbi.count[0] = v4l2->vbi_height;
1814 format->fmt.vbi.count[1] = v4l2->vbi_height;
1815 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
1817 /* Varies by video standard (NTSC, PAL, etc.) */
1818 if (v4l2->norm & V4L2_STD_525_60) {
1820 format->fmt.vbi.start[0] = 10;
1821 format->fmt.vbi.start[1] = 273;
1822 } else if (v4l2->norm & V4L2_STD_625_50) {
1824 format->fmt.vbi.start[0] = 6;
1825 format->fmt.vbi.start[1] = 318;
1831 /* ----------------------------------------------------------- */
1832 /* RADIO ESPECIFIC IOCTLS */
1833 /* ----------------------------------------------------------- */
1835 static int radio_g_tuner(struct file *file, void *priv,
1836 struct v4l2_tuner *t)
1838 struct em28xx *dev = video_drvdata(file);
1840 if (unlikely(t->index > 0))
1843 strcpy(t->name, "Radio");
1845 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
1850 static int radio_s_tuner(struct file *file, void *priv,
1851 const struct v4l2_tuner *t)
1853 struct em28xx *dev = video_drvdata(file);
1858 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
1864 * em28xx_free_v4l2() - Free struct em28xx_v4l2
1866 * @ref: struct kref for struct em28xx_v4l2
1868 * Called when all users of struct em28xx_v4l2 are gone
1870 static void em28xx_free_v4l2(struct kref *ref)
1872 struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref);
1874 v4l2->dev->v4l2 = NULL;
1879 * em28xx_v4l2_open()
1880 * inits the device and starts isoc transfer
1882 static int em28xx_v4l2_open(struct file *filp)
1884 struct video_device *vdev = video_devdata(filp);
1885 struct em28xx *dev = video_drvdata(filp);
1886 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1887 enum v4l2_buf_type fh_type = 0;
1890 switch (vdev->vfl_type) {
1891 case VFL_TYPE_GRABBER:
1892 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1895 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1897 case VFL_TYPE_RADIO:
1903 em28xx_videodbg("open dev=%s type=%s users=%d\n",
1904 video_device_node_name(vdev), v4l2_type_names[fh_type],
1907 if (mutex_lock_interruptible(&dev->lock))
1908 return -ERESTARTSYS;
1910 ret = v4l2_fh_open(filp);
1912 em28xx_errdev("%s: v4l2_fh_open() returned error %d\n",
1914 mutex_unlock(&dev->lock);
1918 if (v4l2->users == 0) {
1919 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
1921 if (vdev->vfl_type != VFL_TYPE_RADIO)
1922 em28xx_resolution_set(dev);
1925 * Needed, since GPIO might have disabled power
1926 * of some i2c devices
1928 em28xx_wake_i2c(dev);
1931 if (vdev->vfl_type == VFL_TYPE_RADIO) {
1932 em28xx_videodbg("video_open: setting radio device\n");
1933 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio);
1936 kref_get(&dev->ref);
1937 kref_get(&v4l2->ref);
1940 mutex_unlock(&dev->lock);
1946 * em28xx_v4l2_fini()
1947 * unregisters the v4l2,i2c and usb devices
1948 * called when the device gets disconected or at module unload
1950 static int em28xx_v4l2_fini(struct em28xx *dev)
1952 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1954 if (dev->is_audio_only) {
1955 /* Shouldn't initialize IR for this interface */
1959 if (!dev->has_video) {
1960 /* This device does not support the v4l2 extension */
1967 em28xx_info("Closing video extension\n");
1969 mutex_lock(&dev->lock);
1971 v4l2_device_disconnect(&v4l2->v4l2_dev);
1973 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1975 if (video_is_registered(&v4l2->radio_dev)) {
1976 em28xx_info("V4L2 device %s deregistered\n",
1977 video_device_node_name(&v4l2->radio_dev));
1978 video_unregister_device(&v4l2->radio_dev);
1980 if (video_is_registered(&v4l2->vbi_dev)) {
1981 em28xx_info("V4L2 device %s deregistered\n",
1982 video_device_node_name(&v4l2->vbi_dev));
1983 video_unregister_device(&v4l2->vbi_dev);
1985 if (video_is_registered(&v4l2->vdev)) {
1986 em28xx_info("V4L2 device %s deregistered\n",
1987 video_device_node_name(&v4l2->vdev));
1988 video_unregister_device(&v4l2->vdev);
1991 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
1992 v4l2_device_unregister(&v4l2->v4l2_dev);
1995 v4l2_clk_unregister_fixed(v4l2->clk);
1999 kref_put(&v4l2->ref, em28xx_free_v4l2);
2001 mutex_unlock(&dev->lock);
2003 kref_put(&dev->ref, em28xx_free_device);
2008 static int em28xx_v4l2_suspend(struct em28xx *dev)
2010 if (dev->is_audio_only)
2013 if (!dev->has_video)
2016 em28xx_info("Suspending video extension\n");
2017 em28xx_stop_urbs(dev);
2021 static int em28xx_v4l2_resume(struct em28xx *dev)
2023 if (dev->is_audio_only)
2026 if (!dev->has_video)
2029 em28xx_info("Resuming video extension\n");
2030 /* what do we do here */
2035 * em28xx_v4l2_close()
2036 * stops streaming and deallocates all resources allocated by the v4l2
2039 static int em28xx_v4l2_close(struct file *filp)
2041 struct em28xx *dev = video_drvdata(filp);
2042 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2045 em28xx_videodbg("users=%d\n", v4l2->users);
2047 vb2_fop_release(filp);
2048 mutex_lock(&dev->lock);
2050 if (v4l2->users == 1) {
2051 /* No sense to try to write to the device */
2052 if (dev->disconnected)
2055 /* Save some power by putting tuner to sleep */
2056 v4l2_device_call_all(&v4l2->v4l2_dev, 0, core, s_power, 0);
2058 /* do this before setting alternate! */
2059 em28xx_set_mode(dev, EM28XX_SUSPEND);
2061 /* set alternate 0 */
2063 em28xx_videodbg("setting alternate 0\n");
2064 errCode = usb_set_interface(dev->udev, 0, 0);
2066 em28xx_errdev("cannot change alternate number to "
2067 "0 (error=%i)\n", errCode);
2073 kref_put(&v4l2->ref, em28xx_free_v4l2);
2074 mutex_unlock(&dev->lock);
2075 kref_put(&dev->ref, em28xx_free_device);
2080 static const struct v4l2_file_operations em28xx_v4l_fops = {
2081 .owner = THIS_MODULE,
2082 .open = em28xx_v4l2_open,
2083 .release = em28xx_v4l2_close,
2084 .read = vb2_fop_read,
2085 .poll = vb2_fop_poll,
2086 .mmap = vb2_fop_mmap,
2087 .unlocked_ioctl = video_ioctl2,
2090 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2091 .vidioc_querycap = vidioc_querycap,
2092 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2093 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2094 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2095 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
2096 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2097 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2098 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2099 .vidioc_enum_framesizes = vidioc_enum_framesizes,
2100 .vidioc_g_audio = vidioc_g_audio,
2101 .vidioc_s_audio = vidioc_s_audio,
2103 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2104 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2105 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
2106 .vidioc_querybuf = vb2_ioctl_querybuf,
2107 .vidioc_qbuf = vb2_ioctl_qbuf,
2108 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2110 .vidioc_g_std = vidioc_g_std,
2111 .vidioc_querystd = vidioc_querystd,
2112 .vidioc_s_std = vidioc_s_std,
2113 .vidioc_g_parm = vidioc_g_parm,
2114 .vidioc_s_parm = vidioc_s_parm,
2115 .vidioc_enum_input = vidioc_enum_input,
2116 .vidioc_g_input = vidioc_g_input,
2117 .vidioc_s_input = vidioc_s_input,
2118 .vidioc_streamon = vb2_ioctl_streamon,
2119 .vidioc_streamoff = vb2_ioctl_streamoff,
2120 .vidioc_g_tuner = vidioc_g_tuner,
2121 .vidioc_s_tuner = vidioc_s_tuner,
2122 .vidioc_g_frequency = vidioc_g_frequency,
2123 .vidioc_s_frequency = vidioc_s_frequency,
2124 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2125 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2126 #ifdef CONFIG_VIDEO_ADV_DEBUG
2127 .vidioc_g_chip_info = vidioc_g_chip_info,
2128 .vidioc_g_register = vidioc_g_register,
2129 .vidioc_s_register = vidioc_s_register,
2133 static const struct video_device em28xx_video_template = {
2134 .fops = &em28xx_v4l_fops,
2135 .ioctl_ops = &video_ioctl_ops,
2136 .release = video_device_release_empty,
2137 .tvnorms = V4L2_STD_ALL,
2140 static const struct v4l2_file_operations radio_fops = {
2141 .owner = THIS_MODULE,
2142 .open = em28xx_v4l2_open,
2143 .release = em28xx_v4l2_close,
2144 .unlocked_ioctl = video_ioctl2,
2147 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2148 .vidioc_querycap = vidioc_querycap,
2149 .vidioc_g_tuner = radio_g_tuner,
2150 .vidioc_s_tuner = radio_s_tuner,
2151 .vidioc_g_frequency = vidioc_g_frequency,
2152 .vidioc_s_frequency = vidioc_s_frequency,
2153 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2154 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2155 #ifdef CONFIG_VIDEO_ADV_DEBUG
2156 .vidioc_g_chip_info = vidioc_g_chip_info,
2157 .vidioc_g_register = vidioc_g_register,
2158 .vidioc_s_register = vidioc_s_register,
2162 static struct video_device em28xx_radio_template = {
2163 .fops = &radio_fops,
2164 .ioctl_ops = &radio_ioctl_ops,
2165 .release = video_device_release_empty,
2168 /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */
2169 static unsigned short saa711x_addrs[] = {
2170 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */
2171 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */
2174 static unsigned short tvp5150_addrs[] = {
2180 static unsigned short msp3400_addrs[] = {
2186 /******************************** usb interface ******************************/
2188 static void em28xx_vdev_init(struct em28xx *dev,
2189 struct video_device *vfd,
2190 const struct video_device *template,
2191 const char *type_name)
2194 vfd->v4l2_dev = &dev->v4l2->v4l2_dev;
2195 vfd->lock = &dev->lock;
2196 if (dev->board.is_webcam)
2199 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2200 dev->name, type_name);
2202 video_set_drvdata(vfd, dev);
2205 static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr)
2207 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2208 struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev;
2209 struct tuner_setup tun_setup;
2210 struct v4l2_frequency f;
2212 memset(&tun_setup, 0, sizeof(tun_setup));
2214 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
2215 tun_setup.tuner_callback = em28xx_tuner_callback;
2217 if (dev->board.radio.type) {
2218 tun_setup.type = dev->board.radio.type;
2219 tun_setup.addr = dev->board.radio_addr;
2221 v4l2_device_call_all(v4l2_dev,
2222 0, tuner, s_type_addr, &tun_setup);
2225 if ((dev->tuner_type != TUNER_ABSENT) && (dev->tuner_type)) {
2226 tun_setup.type = dev->tuner_type;
2227 tun_setup.addr = tuner_addr;
2229 v4l2_device_call_all(v4l2_dev,
2230 0, tuner, s_type_addr, &tun_setup);
2233 if (dev->board.tda9887_conf) {
2234 struct v4l2_priv_tun_config tda9887_cfg;
2236 tda9887_cfg.tuner = TUNER_TDA9887;
2237 tda9887_cfg.priv = &dev->board.tda9887_conf;
2239 v4l2_device_call_all(v4l2_dev,
2240 0, tuner, s_config, &tda9887_cfg);
2243 if (dev->tuner_type == TUNER_XC2028) {
2244 struct v4l2_priv_tun_config xc2028_cfg;
2245 struct xc2028_ctrl ctl;
2247 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg));
2248 memset(&ctl, 0, sizeof(ctl));
2250 em28xx_setup_xc3028(dev, &ctl);
2252 xc2028_cfg.tuner = TUNER_XC2028;
2253 xc2028_cfg.priv = &ctl;
2255 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg);
2258 /* configure tuner */
2260 f.type = V4L2_TUNER_ANALOG_TV;
2261 f.frequency = 9076; /* just a magic number */
2262 v4l2->frequency = f.frequency;
2263 v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f);
2266 static int em28xx_v4l2_init(struct em28xx *dev)
2271 struct v4l2_ctrl_handler *hdl;
2272 struct em28xx_v4l2 *v4l2;
2274 if (dev->is_audio_only) {
2275 /* Shouldn't initialize IR for this interface */
2279 if (!dev->has_video) {
2280 /* This device does not support the v4l2 extension */
2284 em28xx_info("Registering V4L2 extension\n");
2286 mutex_lock(&dev->lock);
2288 v4l2 = kzalloc(sizeof(struct em28xx_v4l2), GFP_KERNEL);
2290 em28xx_info("em28xx_v4l: memory allocation failed\n");
2291 mutex_unlock(&dev->lock);
2294 kref_init(&v4l2->ref);
2298 ret = v4l2_device_register(&dev->udev->dev, &v4l2->v4l2_dev);
2300 em28xx_errdev("Call to v4l2_device_register() failed!\n");
2304 hdl = &v4l2->ctrl_handler;
2305 v4l2_ctrl_handler_init(hdl, 8);
2306 v4l2->v4l2_dev.ctrl_handler = hdl;
2308 if (dev->board.is_webcam)
2309 v4l2->progressive = true;
2312 * Default format, used for tvp5150 or saa711x output formats
2314 v4l2->vinmode = 0x10;
2315 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED |
2316 EM28XX_VINCTRL_CCIR656_ENABLE;
2318 /* request some modules */
2320 if (dev->board.has_msp34xx)
2321 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2322 &dev->i2c_adap[dev->def_i2c_bus],
2323 "msp3400", 0, msp3400_addrs);
2325 if (dev->board.decoder == EM28XX_SAA711X)
2326 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2327 &dev->i2c_adap[dev->def_i2c_bus],
2328 "saa7115_auto", 0, saa711x_addrs);
2330 if (dev->board.decoder == EM28XX_TVP5150)
2331 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2332 &dev->i2c_adap[dev->def_i2c_bus],
2333 "tvp5150", 0, tvp5150_addrs);
2335 if (dev->board.adecoder == EM28XX_TVAUDIO)
2336 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2337 &dev->i2c_adap[dev->def_i2c_bus],
2338 "tvaudio", dev->board.tvaudio_addr, NULL);
2340 /* Initialize tuner and camera */
2342 if (dev->board.tuner_type != TUNER_ABSENT) {
2343 unsigned short tuner_addr = dev->board.tuner_addr;
2344 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT);
2346 if (dev->board.radio.type)
2347 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2348 &dev->i2c_adap[dev->def_i2c_bus],
2349 "tuner", dev->board.radio_addr,
2353 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2354 &dev->i2c_adap[dev->def_i2c_bus],
2356 v4l2_i2c_tuner_addrs(ADDRS_DEMOD));
2357 if (tuner_addr == 0) {
2358 enum v4l2_i2c_tuner_type type =
2359 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV;
2360 struct v4l2_subdev *sd;
2362 sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2363 &dev->i2c_adap[dev->def_i2c_bus],
2365 v4l2_i2c_tuner_addrs(type));
2368 tuner_addr = v4l2_i2c_subdev_addr(sd);
2370 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2371 &dev->i2c_adap[dev->def_i2c_bus],
2372 "tuner", tuner_addr, NULL);
2375 em28xx_tuner_setup(dev, tuner_addr);
2378 if (dev->em28xx_sensor != EM28XX_NOSENSOR)
2379 em28xx_init_camera(dev);
2381 /* Configure audio */
2382 ret = em28xx_audio_setup(dev);
2384 em28xx_errdev("%s: Error while setting audio - error [%d]!\n",
2386 goto unregister_dev;
2388 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
2389 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2390 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
2391 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2392 V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f);
2394 /* install the em28xx notify callback */
2395 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE),
2396 em28xx_ctrl_notify, dev);
2397 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME),
2398 em28xx_ctrl_notify, dev);
2401 /* wake i2c devices */
2402 em28xx_wake_i2c(dev);
2404 /* init video dma queues */
2405 INIT_LIST_HEAD(&dev->vidq.active);
2406 INIT_LIST_HEAD(&dev->vbiq.active);
2408 if (dev->board.has_msp34xx) {
2409 /* Send a reset to other chips via gpio */
2410 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7);
2412 em28xx_errdev("%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n",
2414 goto unregister_dev;
2418 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff);
2420 em28xx_errdev("%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n",
2422 goto unregister_dev;
2427 /* set default norm */
2428 v4l2->norm = V4L2_STD_PAL;
2429 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
2430 v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT;
2432 /* Analog specific initialization */
2433 v4l2->format = &format[0];
2435 maxw = norm_maxw(dev);
2436 /* MaxPacketSize for em2800 is too small to capture at full resolution
2437 * use half of maxw as the scaler can only scale to 50% */
2438 if (dev->board.is_em2800)
2441 em28xx_set_video_format(dev, format[0].fourcc,
2442 maxw, norm_maxh(dev));
2446 /* Audio defaults */
2450 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2451 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2452 em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2453 (EM28XX_XCLK_AUDIO_UNMUTE | val));
2455 em28xx_set_outfmt(dev);
2457 /* Add image controls */
2458 /* NOTE: at this point, the subdevices are already registered, so bridge
2459 * controls are only added/enabled when no subdevice provides them */
2460 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST))
2461 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2463 0, 0x1f, 1, CONTRAST_DEFAULT);
2464 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS))
2465 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2466 V4L2_CID_BRIGHTNESS,
2467 -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT);
2468 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_SATURATION))
2469 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2470 V4L2_CID_SATURATION,
2471 0, 0x1f, 1, SATURATION_DEFAULT);
2472 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE))
2473 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2474 V4L2_CID_BLUE_BALANCE,
2475 -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT);
2476 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE))
2477 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2478 V4L2_CID_RED_BALANCE,
2479 -0x30, 0x30, 1, RED_BALANCE_DEFAULT);
2480 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS))
2481 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2483 0, 0x0f, 1, SHARPNESS_DEFAULT);
2485 /* Reset image controls */
2486 em28xx_colorlevels_set_default(dev);
2487 v4l2_ctrl_handler_setup(hdl);
2490 goto unregister_dev;
2492 /* allocate and fill video video_device struct */
2493 em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video");
2494 mutex_init(&v4l2->vb_queue_lock);
2495 mutex_init(&v4l2->vb_vbi_queue_lock);
2496 v4l2->vdev.queue = &v4l2->vb_vidq;
2497 v4l2->vdev.queue->lock = &v4l2->vb_queue_lock;
2499 /* disable inapplicable ioctls */
2500 if (dev->board.is_webcam) {
2501 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD);
2502 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD);
2503 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD);
2505 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM);
2507 if (dev->tuner_type == TUNER_ABSENT) {
2508 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER);
2509 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER);
2510 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY);
2511 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY);
2513 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2514 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO);
2515 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO);
2518 /* register v4l2 video video_device */
2519 ret = video_register_device(&v4l2->vdev, VFL_TYPE_GRABBER,
2520 video_nr[dev->devno]);
2522 em28xx_errdev("unable to register video device (error=%i).\n",
2524 goto unregister_dev;
2527 /* Allocate and fill vbi video_device struct */
2528 if (em28xx_vbi_supported(dev) == 1) {
2529 em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template,
2532 v4l2->vbi_dev.queue = &v4l2->vb_vbiq;
2533 v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock;
2535 /* disable inapplicable ioctls */
2536 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM);
2537 if (dev->tuner_type == TUNER_ABSENT) {
2538 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER);
2539 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER);
2540 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY);
2541 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY);
2543 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2544 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO);
2545 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO);
2548 /* register v4l2 vbi video_device */
2549 ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI,
2550 vbi_nr[dev->devno]);
2552 em28xx_errdev("unable to register vbi device\n");
2553 goto unregister_dev;
2557 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2558 em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template,
2560 ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO,
2561 radio_nr[dev->devno]);
2563 em28xx_errdev("can't register radio device\n");
2564 goto unregister_dev;
2566 em28xx_info("Registered radio device as %s\n",
2567 video_device_node_name(&v4l2->radio_dev));
2570 em28xx_info("V4L2 video device registered as %s\n",
2571 video_device_node_name(&v4l2->vdev));
2573 if (video_is_registered(&v4l2->vbi_dev))
2574 em28xx_info("V4L2 VBI device registered as %s\n",
2575 video_device_node_name(&v4l2->vbi_dev));
2577 /* Save some power by putting tuner to sleep */
2578 v4l2_device_call_all(&v4l2->v4l2_dev, 0, core, s_power, 0);
2580 /* initialize videobuf2 stuff */
2581 em28xx_vb2_setup(dev);
2583 em28xx_info("V4L2 extension successfully initialized\n");
2585 kref_get(&dev->ref);
2587 mutex_unlock(&dev->lock);
2591 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2592 v4l2_device_unregister(&v4l2->v4l2_dev);
2595 kref_put(&v4l2->ref, em28xx_free_v4l2);
2596 mutex_unlock(&dev->lock);
2600 static struct em28xx_ops v4l2_ops = {
2602 .name = "Em28xx v4l2 Extension",
2603 .init = em28xx_v4l2_init,
2604 .fini = em28xx_v4l2_fini,
2605 .suspend = em28xx_v4l2_suspend,
2606 .resume = em28xx_v4l2_resume,
2609 static int __init em28xx_video_register(void)
2611 return em28xx_register_extension(&v4l2_ops);
2614 static void __exit em28xx_video_unregister(void)
2616 em28xx_unregister_extension(&v4l2_ops);
2619 module_init(em28xx_video_register);
2620 module_exit(em28xx_video_unregister);