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 dev->v4l2->field_count = 0;
935 /* Make sure streaming is not already in progress for this type
936 of filehandle (e.g. video, vbi) */
937 rc = res_get(dev, vq->type);
941 if (v4l2->streaming_users == 0) {
942 /* First active streaming user, so allocate all the URBs */
944 /* Allocate the USB bandwidth */
945 em28xx_set_alternate(dev);
947 /* Needed, since GPIO might have disabled power of
950 em28xx_wake_i2c(dev);
952 v4l2->capture_type = -1;
953 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE,
954 dev->analog_xfer_bulk,
957 dev->packet_multiplier,
958 em28xx_urb_data_copy);
963 * djh: it's not clear whether this code is still needed. I'm
964 * leaving it in here for now entirely out of concern for
965 * backward compatibility (the old code did it)
968 /* Ask tuner to go to analog or radio mode */
969 memset(&f, 0, sizeof(f));
970 f.frequency = v4l2->frequency;
971 owner = (struct v4l2_fh *)vq->owner;
972 if (owner && owner->vdev->vfl_type == VFL_TYPE_RADIO)
973 f.type = V4L2_TUNER_RADIO;
975 f.type = V4L2_TUNER_ANALOG_TV;
976 v4l2_device_call_all(&v4l2->v4l2_dev,
977 0, tuner, s_frequency, &f);
980 v4l2->streaming_users++;
985 static void em28xx_stop_streaming(struct vb2_queue *vq)
987 struct em28xx *dev = vb2_get_drv_priv(vq);
988 struct em28xx_v4l2 *v4l2 = dev->v4l2;
989 struct em28xx_dmaqueue *vidq = &dev->vidq;
990 unsigned long flags = 0;
992 em28xx_videodbg("%s\n", __func__);
994 res_free(dev, vq->type);
996 if (v4l2->streaming_users-- == 1) {
997 /* Last active user, so shutdown all the URBS */
998 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1001 spin_lock_irqsave(&dev->slock, flags);
1002 if (dev->usb_ctl.vid_buf != NULL) {
1003 vb2_buffer_done(&dev->usb_ctl.vid_buf->vb.vb2_buf,
1004 VB2_BUF_STATE_ERROR);
1005 dev->usb_ctl.vid_buf = NULL;
1007 while (!list_empty(&vidq->active)) {
1008 struct em28xx_buffer *buf;
1010 buf = list_entry(vidq->active.next, struct em28xx_buffer, list);
1011 list_del(&buf->list);
1012 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1014 spin_unlock_irqrestore(&dev->slock, flags);
1017 void em28xx_stop_vbi_streaming(struct vb2_queue *vq)
1019 struct em28xx *dev = vb2_get_drv_priv(vq);
1020 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1021 struct em28xx_dmaqueue *vbiq = &dev->vbiq;
1022 unsigned long flags = 0;
1024 em28xx_videodbg("%s\n", __func__);
1026 res_free(dev, vq->type);
1028 if (v4l2->streaming_users-- == 1) {
1029 /* Last active user, so shutdown all the URBS */
1030 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1033 spin_lock_irqsave(&dev->slock, flags);
1034 if (dev->usb_ctl.vbi_buf != NULL) {
1035 vb2_buffer_done(&dev->usb_ctl.vbi_buf->vb.vb2_buf,
1036 VB2_BUF_STATE_ERROR);
1037 dev->usb_ctl.vbi_buf = NULL;
1039 while (!list_empty(&vbiq->active)) {
1040 struct em28xx_buffer *buf;
1042 buf = list_entry(vbiq->active.next, struct em28xx_buffer, list);
1043 list_del(&buf->list);
1044 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1046 spin_unlock_irqrestore(&dev->slock, flags);
1050 buffer_queue(struct vb2_buffer *vb)
1052 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1053 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
1054 struct em28xx_buffer *buf =
1055 container_of(vbuf, struct em28xx_buffer, vb);
1056 struct em28xx_dmaqueue *vidq = &dev->vidq;
1057 unsigned long flags = 0;
1059 em28xx_videodbg("%s\n", __func__);
1060 buf->mem = vb2_plane_vaddr(vb, 0);
1061 buf->length = vb2_plane_size(vb, 0);
1063 spin_lock_irqsave(&dev->slock, flags);
1064 list_add_tail(&buf->list, &vidq->active);
1065 spin_unlock_irqrestore(&dev->slock, flags);
1068 static struct vb2_ops em28xx_video_qops = {
1069 .queue_setup = queue_setup,
1070 .buf_prepare = buffer_prepare,
1071 .buf_queue = buffer_queue,
1072 .start_streaming = em28xx_start_analog_streaming,
1073 .stop_streaming = em28xx_stop_streaming,
1074 .wait_prepare = vb2_ops_wait_prepare,
1075 .wait_finish = vb2_ops_wait_finish,
1078 static int em28xx_vb2_setup(struct em28xx *dev)
1081 struct vb2_queue *q;
1082 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1084 /* Setup Videobuf2 for Video capture */
1086 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1087 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1088 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1090 q->buf_struct_size = sizeof(struct em28xx_buffer);
1091 q->ops = &em28xx_video_qops;
1092 q->mem_ops = &vb2_vmalloc_memops;
1094 rc = vb2_queue_init(q);
1098 /* Setup Videobuf2 for VBI capture */
1100 q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1101 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
1102 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1104 q->buf_struct_size = sizeof(struct em28xx_buffer);
1105 q->ops = &em28xx_vbi_qops;
1106 q->mem_ops = &vb2_vmalloc_memops;
1108 rc = vb2_queue_init(q);
1115 /********************* v4l2 interface **************************************/
1117 static void video_mux(struct em28xx *dev, int index)
1119 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;
1121 dev->ctl_input = index;
1122 dev->ctl_ainput = INPUT(index)->amux;
1123 dev->ctl_aoutput = INPUT(index)->aout;
1125 if (!dev->ctl_aoutput)
1126 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1128 v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
1129 INPUT(index)->vmux, 0, 0);
1131 if (dev->board.has_msp34xx) {
1132 if (dev->i2s_speed) {
1133 v4l2_device_call_all(v4l2_dev, 0, audio,
1134 s_i2s_clock_freq, dev->i2s_speed);
1136 /* Note: this is msp3400 specific */
1137 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1139 MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
1142 if (dev->board.adecoder != EM28XX_NOADECODER) {
1143 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
1144 dev->ctl_ainput, dev->ctl_aoutput, 0);
1147 em28xx_audio_analog_set(dev);
1150 static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv)
1152 struct em28xx *dev = priv;
1155 * In the case of non-AC97 volume controls, we still need
1156 * to do some setups at em28xx, in order to mute/unmute
1157 * and to adjust audio volume. However, the value ranges
1158 * should be checked by the corresponding V4L subdriver.
1161 case V4L2_CID_AUDIO_MUTE:
1162 dev->mute = ctrl->val;
1163 em28xx_audio_analog_set(dev);
1165 case V4L2_CID_AUDIO_VOLUME:
1166 dev->volume = ctrl->val;
1167 em28xx_audio_analog_set(dev);
1172 static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl)
1174 struct em28xx_v4l2 *v4l2 =
1175 container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler);
1176 struct em28xx *dev = v4l2->dev;
1180 case V4L2_CID_AUDIO_MUTE:
1181 dev->mute = ctrl->val;
1182 ret = em28xx_audio_analog_set(dev);
1184 case V4L2_CID_AUDIO_VOLUME:
1185 dev->volume = ctrl->val;
1186 ret = em28xx_audio_analog_set(dev);
1188 case V4L2_CID_CONTRAST:
1189 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val);
1191 case V4L2_CID_BRIGHTNESS:
1192 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val);
1194 case V4L2_CID_SATURATION:
1195 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val);
1197 case V4L2_CID_BLUE_BALANCE:
1198 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val);
1200 case V4L2_CID_RED_BALANCE:
1201 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val);
1203 case V4L2_CID_SHARPNESS:
1204 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val);
1208 return (ret < 0) ? ret : 0;
1211 static const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
1212 .s_ctrl = em28xx_s_ctrl,
1215 static void size_to_scale(struct em28xx *dev,
1216 unsigned int width, unsigned int height,
1217 unsigned int *hscale, unsigned int *vscale)
1219 unsigned int maxw = norm_maxw(dev);
1220 unsigned int maxh = norm_maxh(dev);
1222 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
1223 if (*hscale > EM28XX_HVSCALE_MAX)
1224 *hscale = EM28XX_HVSCALE_MAX;
1226 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
1227 if (*vscale > EM28XX_HVSCALE_MAX)
1228 *vscale = EM28XX_HVSCALE_MAX;
1231 static void scale_to_size(struct em28xx *dev,
1232 unsigned int hscale, unsigned int vscale,
1233 unsigned int *width, unsigned int *height)
1235 unsigned int maxw = norm_maxw(dev);
1236 unsigned int maxh = norm_maxh(dev);
1238 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1239 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1242 /* ------------------------------------------------------------------
1243 IOCTL vidioc handling
1244 ------------------------------------------------------------------*/
1246 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1247 struct v4l2_format *f)
1249 struct em28xx *dev = video_drvdata(file);
1250 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1252 f->fmt.pix.width = v4l2->width;
1253 f->fmt.pix.height = v4l2->height;
1254 f->fmt.pix.pixelformat = v4l2->format->fourcc;
1255 f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3;
1256 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height;
1257 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1259 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1260 if (v4l2->progressive)
1261 f->fmt.pix.field = V4L2_FIELD_NONE;
1263 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1264 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1268 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
1272 for (i = 0; i < ARRAY_SIZE(format); i++)
1273 if (format[i].fourcc == fourcc)
1279 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1280 struct v4l2_format *f)
1282 struct em28xx *dev = video_drvdata(file);
1283 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1284 unsigned int width = f->fmt.pix.width;
1285 unsigned int height = f->fmt.pix.height;
1286 unsigned int maxw = norm_maxw(dev);
1287 unsigned int maxh = norm_maxh(dev);
1288 unsigned int hscale, vscale;
1289 struct em28xx_fmt *fmt;
1291 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
1294 em28xx_videodbg("Fourcc format (%08x) invalid. Using default (%08x).\n",
1295 f->fmt.pix.pixelformat, fmt->fourcc);
1298 if (dev->board.is_em2800) {
1299 /* the em2800 can only scale down to 50% */
1300 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
1301 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
1303 * MaxPacketSize for em2800 is too small to capture at full
1304 * resolution use half of maxw as the scaler can only scale
1307 if (width == maxw && height == maxh)
1310 /* width must even because of the YUYV format
1311 height must be even because of interlacing */
1312 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1316 size_to_scale(dev, width, height, &hscale, &vscale);
1317 scale_to_size(dev, hscale, vscale, &width, &height);
1319 f->fmt.pix.width = width;
1320 f->fmt.pix.height = height;
1321 f->fmt.pix.pixelformat = fmt->fourcc;
1322 f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
1323 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1324 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1325 if (v4l2->progressive)
1326 f->fmt.pix.field = V4L2_FIELD_NONE;
1328 f->fmt.pix.field = v4l2->interlaced_fieldmode ?
1329 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1330 f->fmt.pix.priv = 0;
1335 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1336 unsigned width, unsigned height)
1338 struct em28xx_fmt *fmt;
1339 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1341 fmt = format_by_fourcc(fourcc);
1346 v4l2->width = width;
1347 v4l2->height = height;
1349 /* set new image size */
1350 size_to_scale(dev, v4l2->width, v4l2->height,
1351 &v4l2->hscale, &v4l2->vscale);
1353 em28xx_resolution_set(dev);
1358 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1359 struct v4l2_format *f)
1361 struct em28xx *dev = video_drvdata(file);
1362 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1364 if (vb2_is_busy(&v4l2->vb_vidq))
1367 vidioc_try_fmt_vid_cap(file, priv, f);
1369 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1370 f->fmt.pix.width, f->fmt.pix.height);
1373 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1375 struct em28xx *dev = video_drvdata(file);
1377 *norm = dev->v4l2->norm;
1382 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
1384 struct em28xx *dev = video_drvdata(file);
1386 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm);
1391 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
1393 struct em28xx *dev = video_drvdata(file);
1394 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1395 struct v4l2_format f;
1397 if (norm == v4l2->norm)
1400 if (v4l2->streaming_users > 0)
1405 /* Adjusts width/height, if needed */
1406 f.fmt.pix.width = 720;
1407 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576;
1408 vidioc_try_fmt_vid_cap(file, priv, &f);
1410 /* set new image size */
1411 v4l2->width = f.fmt.pix.width;
1412 v4l2->height = f.fmt.pix.height;
1413 size_to_scale(dev, v4l2->width, v4l2->height,
1414 &v4l2->hscale, &v4l2->vscale);
1416 em28xx_resolution_set(dev);
1417 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
1422 static int vidioc_g_parm(struct file *file, void *priv,
1423 struct v4l2_streamparm *p)
1425 struct em28xx *dev = video_drvdata(file);
1426 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1429 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1430 if (dev->board.is_webcam)
1431 rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0,
1434 v4l2_video_std_frame_period(v4l2->norm,
1435 &p->parm.capture.timeperframe);
1440 static int vidioc_s_parm(struct file *file, void *priv,
1441 struct v4l2_streamparm *p)
1443 struct em28xx *dev = video_drvdata(file);
1445 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1446 return v4l2_device_call_until_err(&dev->v4l2->v4l2_dev,
1447 0, video, s_parm, p);
1450 static const char *iname[] = {
1451 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1452 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1453 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1454 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1455 [EM28XX_VMUX_SVIDEO] = "S-Video",
1456 [EM28XX_VMUX_TELEVISION] = "Television",
1457 [EM28XX_VMUX_CABLE] = "Cable TV",
1458 [EM28XX_VMUX_DVB] = "DVB",
1459 [EM28XX_VMUX_DEBUG] = "for debug only",
1462 static int vidioc_enum_input(struct file *file, void *priv,
1463 struct v4l2_input *i)
1465 struct em28xx *dev = video_drvdata(file);
1469 if (n >= MAX_EM28XX_INPUT)
1471 if (0 == INPUT(n)->type)
1475 i->type = V4L2_INPUT_TYPE_CAMERA;
1477 strcpy(i->name, iname[INPUT(n)->type]);
1479 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1480 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1481 i->type = V4L2_INPUT_TYPE_TUNER;
1483 i->std = dev->v4l2->vdev.tvnorms;
1484 /* webcams do not have the STD API */
1485 if (dev->board.is_webcam)
1486 i->capabilities = 0;
1491 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1493 struct em28xx *dev = video_drvdata(file);
1495 *i = dev->ctl_input;
1500 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1502 struct em28xx *dev = video_drvdata(file);
1504 if (i >= MAX_EM28XX_INPUT)
1506 if (0 == INPUT(i)->type)
1513 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1515 struct em28xx *dev = video_drvdata(file);
1518 case EM28XX_AMUX_VIDEO:
1519 strcpy(a->name, "Television");
1521 case EM28XX_AMUX_LINE_IN:
1522 strcpy(a->name, "Line In");
1524 case EM28XX_AMUX_VIDEO2:
1525 strcpy(a->name, "Television alt");
1527 case EM28XX_AMUX_PHONE:
1528 strcpy(a->name, "Phone");
1530 case EM28XX_AMUX_MIC:
1531 strcpy(a->name, "Mic");
1533 case EM28XX_AMUX_CD:
1534 strcpy(a->name, "CD");
1536 case EM28XX_AMUX_AUX:
1537 strcpy(a->name, "Aux");
1539 case EM28XX_AMUX_PCM_OUT:
1540 strcpy(a->name, "PCM");
1546 a->index = dev->ctl_ainput;
1547 a->capability = V4L2_AUDCAP_STEREO;
1552 static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a)
1554 struct em28xx *dev = video_drvdata(file);
1556 if (a->index >= MAX_EM28XX_INPUT)
1558 if (0 == INPUT(a->index)->type)
1561 dev->ctl_ainput = INPUT(a->index)->amux;
1562 dev->ctl_aoutput = INPUT(a->index)->aout;
1564 if (!dev->ctl_aoutput)
1565 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1570 static int vidioc_g_tuner(struct file *file, void *priv,
1571 struct v4l2_tuner *t)
1573 struct em28xx *dev = video_drvdata(file);
1578 strcpy(t->name, "Tuner");
1580 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
1584 static int vidioc_s_tuner(struct file *file, void *priv,
1585 const struct v4l2_tuner *t)
1587 struct em28xx *dev = video_drvdata(file);
1592 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
1596 static int vidioc_g_frequency(struct file *file, void *priv,
1597 struct v4l2_frequency *f)
1599 struct em28xx *dev = video_drvdata(file);
1600 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1605 f->frequency = v4l2->frequency;
1609 static int vidioc_s_frequency(struct file *file, void *priv,
1610 const struct v4l2_frequency *f)
1612 struct v4l2_frequency new_freq = *f;
1613 struct em28xx *dev = video_drvdata(file);
1614 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1619 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f);
1620 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq);
1621 v4l2->frequency = new_freq.frequency;
1626 #ifdef CONFIG_VIDEO_ADV_DEBUG
1627 static int vidioc_g_chip_info(struct file *file, void *priv,
1628 struct v4l2_dbg_chip_info *chip)
1630 struct em28xx *dev = video_drvdata(file);
1632 if (chip->match.addr > 1)
1634 if (chip->match.addr == 1)
1635 strlcpy(chip->name, "ac97", sizeof(chip->name));
1638 dev->v4l2->v4l2_dev.name, sizeof(chip->name));
1642 static int em28xx_reg_len(int reg)
1645 case EM28XX_R40_AC97LSB:
1646 case EM28XX_R30_HSCALELOW:
1647 case EM28XX_R32_VSCALELOW:
1654 static int vidioc_g_register(struct file *file, void *priv,
1655 struct v4l2_dbg_register *reg)
1657 struct em28xx *dev = video_drvdata(file);
1660 if (reg->match.addr > 1)
1662 if (reg->match.addr) {
1663 ret = em28xx_read_ac97(dev, reg->reg);
1673 reg->size = em28xx_reg_len(reg->reg);
1674 if (reg->size == 1) {
1675 ret = em28xx_read_reg(dev, reg->reg);
1684 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1685 reg->reg, (char *)&val, 2);
1689 reg->val = le16_to_cpu(val);
1695 static int vidioc_s_register(struct file *file, void *priv,
1696 const struct v4l2_dbg_register *reg)
1698 struct em28xx *dev = video_drvdata(file);
1701 if (reg->match.addr > 1)
1703 if (reg->match.addr)
1704 return em28xx_write_ac97(dev, reg->reg, reg->val);
1707 buf = cpu_to_le16(reg->val);
1709 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1710 em28xx_reg_len(reg->reg));
1714 static int vidioc_querycap(struct file *file, void *priv,
1715 struct v4l2_capability *cap)
1717 struct video_device *vdev = video_devdata(file);
1718 struct em28xx *dev = video_drvdata(file);
1719 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1721 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1722 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1723 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1725 if (vdev->vfl_type == VFL_TYPE_GRABBER)
1726 cap->device_caps = V4L2_CAP_READWRITE |
1727 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1728 else if (vdev->vfl_type == VFL_TYPE_RADIO)
1729 cap->device_caps = V4L2_CAP_RADIO;
1731 cap->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE;
1733 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
1734 cap->device_caps |= V4L2_CAP_AUDIO;
1736 if (dev->tuner_type != TUNER_ABSENT)
1737 cap->device_caps |= V4L2_CAP_TUNER;
1739 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS |
1740 V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1741 if (video_is_registered(&v4l2->vbi_dev))
1742 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1743 if (video_is_registered(&v4l2->radio_dev))
1744 cap->capabilities |= V4L2_CAP_RADIO;
1748 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1749 struct v4l2_fmtdesc *f)
1751 if (unlikely(f->index >= ARRAY_SIZE(format)))
1754 strlcpy(f->description, format[f->index].name, sizeof(f->description));
1755 f->pixelformat = format[f->index].fourcc;
1760 static int vidioc_enum_framesizes(struct file *file, void *priv,
1761 struct v4l2_frmsizeenum *fsize)
1763 struct em28xx *dev = video_drvdata(file);
1764 struct em28xx_fmt *fmt;
1765 unsigned int maxw = norm_maxw(dev);
1766 unsigned int maxh = norm_maxh(dev);
1768 fmt = format_by_fourcc(fsize->pixel_format);
1770 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1771 fsize->pixel_format);
1775 if (dev->board.is_em2800) {
1776 if (fsize->index > 1)
1778 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1779 fsize->discrete.width = maxw / (1 + fsize->index);
1780 fsize->discrete.height = maxh / (1 + fsize->index);
1784 if (fsize->index != 0)
1787 /* Report a continuous range */
1788 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
1789 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
1790 &fsize->stepwise.min_width, &fsize->stepwise.min_height);
1791 if (fsize->stepwise.min_width < 48)
1792 fsize->stepwise.min_width = 48;
1793 if (fsize->stepwise.min_height < 38)
1794 fsize->stepwise.min_height = 38;
1795 fsize->stepwise.max_width = maxw;
1796 fsize->stepwise.max_height = maxh;
1797 fsize->stepwise.step_width = 1;
1798 fsize->stepwise.step_height = 1;
1802 /* RAW VBI ioctls */
1804 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1805 struct v4l2_format *format)
1807 struct em28xx *dev = video_drvdata(file);
1808 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1810 format->fmt.vbi.samples_per_line = v4l2->vbi_width;
1811 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1812 format->fmt.vbi.offset = 0;
1813 format->fmt.vbi.flags = 0;
1814 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1815 format->fmt.vbi.count[0] = v4l2->vbi_height;
1816 format->fmt.vbi.count[1] = v4l2->vbi_height;
1817 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
1819 /* Varies by video standard (NTSC, PAL, etc.) */
1820 if (v4l2->norm & V4L2_STD_525_60) {
1822 format->fmt.vbi.start[0] = 10;
1823 format->fmt.vbi.start[1] = 273;
1824 } else if (v4l2->norm & V4L2_STD_625_50) {
1826 format->fmt.vbi.start[0] = 6;
1827 format->fmt.vbi.start[1] = 318;
1833 /* ----------------------------------------------------------- */
1834 /* RADIO ESPECIFIC IOCTLS */
1835 /* ----------------------------------------------------------- */
1837 static int radio_g_tuner(struct file *file, void *priv,
1838 struct v4l2_tuner *t)
1840 struct em28xx *dev = video_drvdata(file);
1842 if (unlikely(t->index > 0))
1845 strcpy(t->name, "Radio");
1847 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
1852 static int radio_s_tuner(struct file *file, void *priv,
1853 const struct v4l2_tuner *t)
1855 struct em28xx *dev = video_drvdata(file);
1860 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
1866 * em28xx_free_v4l2() - Free struct em28xx_v4l2
1868 * @ref: struct kref for struct em28xx_v4l2
1870 * Called when all users of struct em28xx_v4l2 are gone
1872 static void em28xx_free_v4l2(struct kref *ref)
1874 struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref);
1876 v4l2->dev->v4l2 = NULL;
1881 * em28xx_v4l2_open()
1882 * inits the device and starts isoc transfer
1884 static int em28xx_v4l2_open(struct file *filp)
1886 struct video_device *vdev = video_devdata(filp);
1887 struct em28xx *dev = video_drvdata(filp);
1888 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1889 enum v4l2_buf_type fh_type = 0;
1892 switch (vdev->vfl_type) {
1893 case VFL_TYPE_GRABBER:
1894 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1897 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1899 case VFL_TYPE_RADIO:
1905 em28xx_videodbg("open dev=%s type=%s users=%d\n",
1906 video_device_node_name(vdev), v4l2_type_names[fh_type],
1909 if (mutex_lock_interruptible(&dev->lock))
1910 return -ERESTARTSYS;
1912 ret = v4l2_fh_open(filp);
1914 em28xx_errdev("%s: v4l2_fh_open() returned error %d\n",
1916 mutex_unlock(&dev->lock);
1920 if (v4l2->users == 0) {
1921 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
1923 if (vdev->vfl_type != VFL_TYPE_RADIO)
1924 em28xx_resolution_set(dev);
1927 * Needed, since GPIO might have disabled power
1928 * of some i2c devices
1930 em28xx_wake_i2c(dev);
1933 if (vdev->vfl_type == VFL_TYPE_RADIO) {
1934 em28xx_videodbg("video_open: setting radio device\n");
1935 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio);
1938 kref_get(&dev->ref);
1939 kref_get(&v4l2->ref);
1942 mutex_unlock(&dev->lock);
1948 * em28xx_v4l2_fini()
1949 * unregisters the v4l2,i2c and usb devices
1950 * called when the device gets disconected or at module unload
1952 static int em28xx_v4l2_fini(struct em28xx *dev)
1954 struct em28xx_v4l2 *v4l2 = dev->v4l2;
1956 if (dev->is_audio_only) {
1957 /* Shouldn't initialize IR for this interface */
1961 if (!dev->has_video) {
1962 /* This device does not support the v4l2 extension */
1969 em28xx_info("Closing video extension\n");
1971 mutex_lock(&dev->lock);
1973 v4l2_device_disconnect(&v4l2->v4l2_dev);
1975 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
1977 if (video_is_registered(&v4l2->radio_dev)) {
1978 em28xx_info("V4L2 device %s deregistered\n",
1979 video_device_node_name(&v4l2->radio_dev));
1980 video_unregister_device(&v4l2->radio_dev);
1982 if (video_is_registered(&v4l2->vbi_dev)) {
1983 em28xx_info("V4L2 device %s deregistered\n",
1984 video_device_node_name(&v4l2->vbi_dev));
1985 video_unregister_device(&v4l2->vbi_dev);
1987 if (video_is_registered(&v4l2->vdev)) {
1988 em28xx_info("V4L2 device %s deregistered\n",
1989 video_device_node_name(&v4l2->vdev));
1990 video_unregister_device(&v4l2->vdev);
1993 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
1994 v4l2_device_unregister(&v4l2->v4l2_dev);
1997 v4l2_clk_unregister_fixed(v4l2->clk);
2001 kref_put(&v4l2->ref, em28xx_free_v4l2);
2003 mutex_unlock(&dev->lock);
2005 kref_put(&dev->ref, em28xx_free_device);
2010 static int em28xx_v4l2_suspend(struct em28xx *dev)
2012 if (dev->is_audio_only)
2015 if (!dev->has_video)
2018 em28xx_info("Suspending video extension\n");
2019 em28xx_stop_urbs(dev);
2023 static int em28xx_v4l2_resume(struct em28xx *dev)
2025 if (dev->is_audio_only)
2028 if (!dev->has_video)
2031 em28xx_info("Resuming video extension\n");
2032 /* what do we do here */
2037 * em28xx_v4l2_close()
2038 * stops streaming and deallocates all resources allocated by the v4l2
2041 static int em28xx_v4l2_close(struct file *filp)
2043 struct em28xx *dev = video_drvdata(filp);
2044 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2047 em28xx_videodbg("users=%d\n", v4l2->users);
2049 vb2_fop_release(filp);
2050 mutex_lock(&dev->lock);
2052 if (v4l2->users == 1) {
2053 /* No sense to try to write to the device */
2054 if (dev->disconnected)
2057 /* Save some power by putting tuner to sleep */
2058 v4l2_device_call_all(&v4l2->v4l2_dev, 0, core, s_power, 0);
2060 /* do this before setting alternate! */
2061 em28xx_set_mode(dev, EM28XX_SUSPEND);
2063 /* set alternate 0 */
2065 em28xx_videodbg("setting alternate 0\n");
2066 errCode = usb_set_interface(dev->udev, 0, 0);
2068 em28xx_errdev("cannot change alternate number to "
2069 "0 (error=%i)\n", errCode);
2075 kref_put(&v4l2->ref, em28xx_free_v4l2);
2076 mutex_unlock(&dev->lock);
2077 kref_put(&dev->ref, em28xx_free_device);
2082 static const struct v4l2_file_operations em28xx_v4l_fops = {
2083 .owner = THIS_MODULE,
2084 .open = em28xx_v4l2_open,
2085 .release = em28xx_v4l2_close,
2086 .read = vb2_fop_read,
2087 .poll = vb2_fop_poll,
2088 .mmap = vb2_fop_mmap,
2089 .unlocked_ioctl = video_ioctl2,
2092 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2093 .vidioc_querycap = vidioc_querycap,
2094 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2095 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2096 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2097 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
2098 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2099 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2100 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
2101 .vidioc_enum_framesizes = vidioc_enum_framesizes,
2102 .vidioc_g_audio = vidioc_g_audio,
2103 .vidioc_s_audio = vidioc_s_audio,
2105 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2106 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2107 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
2108 .vidioc_querybuf = vb2_ioctl_querybuf,
2109 .vidioc_qbuf = vb2_ioctl_qbuf,
2110 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2112 .vidioc_g_std = vidioc_g_std,
2113 .vidioc_querystd = vidioc_querystd,
2114 .vidioc_s_std = vidioc_s_std,
2115 .vidioc_g_parm = vidioc_g_parm,
2116 .vidioc_s_parm = vidioc_s_parm,
2117 .vidioc_enum_input = vidioc_enum_input,
2118 .vidioc_g_input = vidioc_g_input,
2119 .vidioc_s_input = vidioc_s_input,
2120 .vidioc_streamon = vb2_ioctl_streamon,
2121 .vidioc_streamoff = vb2_ioctl_streamoff,
2122 .vidioc_g_tuner = vidioc_g_tuner,
2123 .vidioc_s_tuner = vidioc_s_tuner,
2124 .vidioc_g_frequency = vidioc_g_frequency,
2125 .vidioc_s_frequency = vidioc_s_frequency,
2126 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2127 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2128 #ifdef CONFIG_VIDEO_ADV_DEBUG
2129 .vidioc_g_chip_info = vidioc_g_chip_info,
2130 .vidioc_g_register = vidioc_g_register,
2131 .vidioc_s_register = vidioc_s_register,
2135 static const struct video_device em28xx_video_template = {
2136 .fops = &em28xx_v4l_fops,
2137 .ioctl_ops = &video_ioctl_ops,
2138 .release = video_device_release_empty,
2139 .tvnorms = V4L2_STD_ALL,
2142 static const struct v4l2_file_operations radio_fops = {
2143 .owner = THIS_MODULE,
2144 .open = em28xx_v4l2_open,
2145 .release = em28xx_v4l2_close,
2146 .unlocked_ioctl = video_ioctl2,
2149 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2150 .vidioc_querycap = vidioc_querycap,
2151 .vidioc_g_tuner = radio_g_tuner,
2152 .vidioc_s_tuner = radio_s_tuner,
2153 .vidioc_g_frequency = vidioc_g_frequency,
2154 .vidioc_s_frequency = vidioc_s_frequency,
2155 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2156 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2157 #ifdef CONFIG_VIDEO_ADV_DEBUG
2158 .vidioc_g_chip_info = vidioc_g_chip_info,
2159 .vidioc_g_register = vidioc_g_register,
2160 .vidioc_s_register = vidioc_s_register,
2164 static struct video_device em28xx_radio_template = {
2165 .fops = &radio_fops,
2166 .ioctl_ops = &radio_ioctl_ops,
2167 .release = video_device_release_empty,
2170 /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */
2171 static unsigned short saa711x_addrs[] = {
2172 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */
2173 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */
2176 static unsigned short tvp5150_addrs[] = {
2182 static unsigned short msp3400_addrs[] = {
2188 /******************************** usb interface ******************************/
2190 static void em28xx_vdev_init(struct em28xx *dev,
2191 struct video_device *vfd,
2192 const struct video_device *template,
2193 const char *type_name)
2196 vfd->v4l2_dev = &dev->v4l2->v4l2_dev;
2197 vfd->lock = &dev->lock;
2198 if (dev->board.is_webcam)
2201 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2202 dev->name, type_name);
2204 video_set_drvdata(vfd, dev);
2207 static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr)
2209 struct em28xx_v4l2 *v4l2 = dev->v4l2;
2210 struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev;
2211 struct tuner_setup tun_setup;
2212 struct v4l2_frequency f;
2214 memset(&tun_setup, 0, sizeof(tun_setup));
2216 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
2217 tun_setup.tuner_callback = em28xx_tuner_callback;
2219 if (dev->board.radio.type) {
2220 tun_setup.type = dev->board.radio.type;
2221 tun_setup.addr = dev->board.radio_addr;
2223 v4l2_device_call_all(v4l2_dev,
2224 0, tuner, s_type_addr, &tun_setup);
2227 if ((dev->tuner_type != TUNER_ABSENT) && (dev->tuner_type)) {
2228 tun_setup.type = dev->tuner_type;
2229 tun_setup.addr = tuner_addr;
2231 v4l2_device_call_all(v4l2_dev,
2232 0, tuner, s_type_addr, &tun_setup);
2235 if (dev->board.tda9887_conf) {
2236 struct v4l2_priv_tun_config tda9887_cfg;
2238 tda9887_cfg.tuner = TUNER_TDA9887;
2239 tda9887_cfg.priv = &dev->board.tda9887_conf;
2241 v4l2_device_call_all(v4l2_dev,
2242 0, tuner, s_config, &tda9887_cfg);
2245 if (dev->tuner_type == TUNER_XC2028) {
2246 struct v4l2_priv_tun_config xc2028_cfg;
2247 struct xc2028_ctrl ctl;
2249 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg));
2250 memset(&ctl, 0, sizeof(ctl));
2252 em28xx_setup_xc3028(dev, &ctl);
2254 xc2028_cfg.tuner = TUNER_XC2028;
2255 xc2028_cfg.priv = &ctl;
2257 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg);
2260 /* configure tuner */
2262 f.type = V4L2_TUNER_ANALOG_TV;
2263 f.frequency = 9076; /* just a magic number */
2264 v4l2->frequency = f.frequency;
2265 v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f);
2268 static int em28xx_v4l2_init(struct em28xx *dev)
2273 struct v4l2_ctrl_handler *hdl;
2274 struct em28xx_v4l2 *v4l2;
2276 if (dev->is_audio_only) {
2277 /* Shouldn't initialize IR for this interface */
2281 if (!dev->has_video) {
2282 /* This device does not support the v4l2 extension */
2286 em28xx_info("Registering V4L2 extension\n");
2288 mutex_lock(&dev->lock);
2290 v4l2 = kzalloc(sizeof(struct em28xx_v4l2), GFP_KERNEL);
2292 em28xx_info("em28xx_v4l: memory allocation failed\n");
2293 mutex_unlock(&dev->lock);
2296 kref_init(&v4l2->ref);
2300 ret = v4l2_device_register(&dev->udev->dev, &v4l2->v4l2_dev);
2302 em28xx_errdev("Call to v4l2_device_register() failed!\n");
2306 hdl = &v4l2->ctrl_handler;
2307 v4l2_ctrl_handler_init(hdl, 8);
2308 v4l2->v4l2_dev.ctrl_handler = hdl;
2310 if (dev->board.is_webcam)
2311 v4l2->progressive = true;
2314 * Default format, used for tvp5150 or saa711x output formats
2316 v4l2->vinmode = 0x10;
2317 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED |
2318 EM28XX_VINCTRL_CCIR656_ENABLE;
2320 /* request some modules */
2322 if (dev->board.has_msp34xx)
2323 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2324 &dev->i2c_adap[dev->def_i2c_bus],
2325 "msp3400", 0, msp3400_addrs);
2327 if (dev->board.decoder == EM28XX_SAA711X)
2328 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2329 &dev->i2c_adap[dev->def_i2c_bus],
2330 "saa7115_auto", 0, saa711x_addrs);
2332 if (dev->board.decoder == EM28XX_TVP5150)
2333 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2334 &dev->i2c_adap[dev->def_i2c_bus],
2335 "tvp5150", 0, tvp5150_addrs);
2337 if (dev->board.adecoder == EM28XX_TVAUDIO)
2338 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2339 &dev->i2c_adap[dev->def_i2c_bus],
2340 "tvaudio", dev->board.tvaudio_addr, NULL);
2342 /* Initialize tuner and camera */
2344 if (dev->board.tuner_type != TUNER_ABSENT) {
2345 unsigned short tuner_addr = dev->board.tuner_addr;
2346 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT);
2348 if (dev->board.radio.type)
2349 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2350 &dev->i2c_adap[dev->def_i2c_bus],
2351 "tuner", dev->board.radio_addr,
2355 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2356 &dev->i2c_adap[dev->def_i2c_bus],
2358 v4l2_i2c_tuner_addrs(ADDRS_DEMOD));
2359 if (tuner_addr == 0) {
2360 enum v4l2_i2c_tuner_type type =
2361 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV;
2362 struct v4l2_subdev *sd;
2364 sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2365 &dev->i2c_adap[dev->def_i2c_bus],
2367 v4l2_i2c_tuner_addrs(type));
2370 tuner_addr = v4l2_i2c_subdev_addr(sd);
2372 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2373 &dev->i2c_adap[dev->def_i2c_bus],
2374 "tuner", tuner_addr, NULL);
2377 em28xx_tuner_setup(dev, tuner_addr);
2380 if (dev->em28xx_sensor != EM28XX_NOSENSOR)
2381 em28xx_init_camera(dev);
2383 /* Configure audio */
2384 ret = em28xx_audio_setup(dev);
2386 em28xx_errdev("%s: Error while setting audio - error [%d]!\n",
2388 goto unregister_dev;
2390 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
2391 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2392 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
2393 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2394 V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f);
2396 /* install the em28xx notify callback */
2397 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE),
2398 em28xx_ctrl_notify, dev);
2399 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME),
2400 em28xx_ctrl_notify, dev);
2403 /* wake i2c devices */
2404 em28xx_wake_i2c(dev);
2406 /* init video dma queues */
2407 INIT_LIST_HEAD(&dev->vidq.active);
2408 INIT_LIST_HEAD(&dev->vbiq.active);
2410 if (dev->board.has_msp34xx) {
2411 /* Send a reset to other chips via gpio */
2412 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7);
2414 em28xx_errdev("%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n",
2416 goto unregister_dev;
2420 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff);
2422 em28xx_errdev("%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n",
2424 goto unregister_dev;
2429 /* set default norm */
2430 v4l2->norm = V4L2_STD_PAL;
2431 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
2432 v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT;
2434 /* Analog specific initialization */
2435 v4l2->format = &format[0];
2437 maxw = norm_maxw(dev);
2438 /* MaxPacketSize for em2800 is too small to capture at full resolution
2439 * use half of maxw as the scaler can only scale to 50% */
2440 if (dev->board.is_em2800)
2443 em28xx_set_video_format(dev, format[0].fourcc,
2444 maxw, norm_maxh(dev));
2448 /* Audio defaults */
2452 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2453 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2454 em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2455 (EM28XX_XCLK_AUDIO_UNMUTE | val));
2457 em28xx_set_outfmt(dev);
2459 /* Add image controls */
2460 /* NOTE: at this point, the subdevices are already registered, so bridge
2461 * controls are only added/enabled when no subdevice provides them */
2462 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST))
2463 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2465 0, 0x1f, 1, CONTRAST_DEFAULT);
2466 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS))
2467 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2468 V4L2_CID_BRIGHTNESS,
2469 -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT);
2470 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_SATURATION))
2471 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2472 V4L2_CID_SATURATION,
2473 0, 0x1f, 1, SATURATION_DEFAULT);
2474 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE))
2475 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2476 V4L2_CID_BLUE_BALANCE,
2477 -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT);
2478 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE))
2479 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2480 V4L2_CID_RED_BALANCE,
2481 -0x30, 0x30, 1, RED_BALANCE_DEFAULT);
2482 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS))
2483 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2485 0, 0x0f, 1, SHARPNESS_DEFAULT);
2487 /* Reset image controls */
2488 em28xx_colorlevels_set_default(dev);
2489 v4l2_ctrl_handler_setup(hdl);
2492 goto unregister_dev;
2494 /* allocate and fill video video_device struct */
2495 em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video");
2496 mutex_init(&v4l2->vb_queue_lock);
2497 mutex_init(&v4l2->vb_vbi_queue_lock);
2498 v4l2->vdev.queue = &v4l2->vb_vidq;
2499 v4l2->vdev.queue->lock = &v4l2->vb_queue_lock;
2501 /* disable inapplicable ioctls */
2502 if (dev->board.is_webcam) {
2503 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD);
2504 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD);
2505 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD);
2507 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM);
2509 if (dev->tuner_type == TUNER_ABSENT) {
2510 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER);
2511 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER);
2512 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY);
2513 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY);
2515 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2516 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO);
2517 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO);
2520 /* register v4l2 video video_device */
2521 ret = video_register_device(&v4l2->vdev, VFL_TYPE_GRABBER,
2522 video_nr[dev->devno]);
2524 em28xx_errdev("unable to register video device (error=%i).\n",
2526 goto unregister_dev;
2529 /* Allocate and fill vbi video_device struct */
2530 if (em28xx_vbi_supported(dev) == 1) {
2531 em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template,
2534 v4l2->vbi_dev.queue = &v4l2->vb_vbiq;
2535 v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock;
2537 /* disable inapplicable ioctls */
2538 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM);
2539 if (dev->tuner_type == TUNER_ABSENT) {
2540 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER);
2541 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER);
2542 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY);
2543 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY);
2545 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2546 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO);
2547 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO);
2550 /* register v4l2 vbi video_device */
2551 ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI,
2552 vbi_nr[dev->devno]);
2554 em28xx_errdev("unable to register vbi device\n");
2555 goto unregister_dev;
2559 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2560 em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template,
2562 ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO,
2563 radio_nr[dev->devno]);
2565 em28xx_errdev("can't register radio device\n");
2566 goto unregister_dev;
2568 em28xx_info("Registered radio device as %s\n",
2569 video_device_node_name(&v4l2->radio_dev));
2572 em28xx_info("V4L2 video device registered as %s\n",
2573 video_device_node_name(&v4l2->vdev));
2575 if (video_is_registered(&v4l2->vbi_dev))
2576 em28xx_info("V4L2 VBI device registered as %s\n",
2577 video_device_node_name(&v4l2->vbi_dev));
2579 /* Save some power by putting tuner to sleep */
2580 v4l2_device_call_all(&v4l2->v4l2_dev, 0, core, s_power, 0);
2582 /* initialize videobuf2 stuff */
2583 em28xx_vb2_setup(dev);
2585 em28xx_info("V4L2 extension successfully initialized\n");
2587 kref_get(&dev->ref);
2589 mutex_unlock(&dev->lock);
2593 v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2594 v4l2_device_unregister(&v4l2->v4l2_dev);
2597 kref_put(&v4l2->ref, em28xx_free_v4l2);
2598 mutex_unlock(&dev->lock);
2602 static struct em28xx_ops v4l2_ops = {
2604 .name = "Em28xx v4l2 Extension",
2605 .init = em28xx_v4l2_init,
2606 .fini = em28xx_v4l2_fini,
2607 .suspend = em28xx_v4l2_suspend,
2608 .resume = em28xx_v4l2_resume,
2611 static int __init em28xx_video_register(void)
2613 return em28xx_register_extension(&v4l2_ops);
2616 static void __exit em28xx_video_unregister(void)
2618 em28xx_unregister_extension(&v4l2_ops);
2621 module_init(em28xx_video_register);
2622 module_exit(em28xx_video_unregister);