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 <media/v4l2-common.h>
42 #include <media/v4l2-ioctl.h>
43 #include <media/v4l2-event.h>
44 #include <media/msp3400.h>
45 #include <media/tuner.h>
47 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
48 "Markus Rechberger <mrechberger@gmail.com>, " \
49 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
50 "Sascha Sommer <saschasommer@freenet.de>"
52 #define DRIVER_DESC "Empia em28xx based USB video device driver"
54 #define EM28XX_VERSION "0.2.0"
56 #define em28xx_videodbg(fmt, arg...) do {\
58 printk(KERN_INFO "%s %s :"fmt, \
59 dev->name, __func__ , ##arg); } while (0)
61 static unsigned int isoc_debug;
62 module_param(isoc_debug, int, 0644);
63 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
65 #define em28xx_isocdbg(fmt, arg...) \
68 printk(KERN_INFO "%s %s :"fmt, \
69 dev->name, __func__ , ##arg); \
73 MODULE_AUTHOR(DRIVER_AUTHOR);
74 MODULE_DESCRIPTION(DRIVER_DESC);
75 MODULE_LICENSE("GPL");
76 MODULE_VERSION(EM28XX_VERSION);
79 #define EM25XX_FRMDATAHDR_BYTE1 0x02
80 #define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE 0x20
81 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_END 0x02
82 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID 0x01
83 #define EM25XX_FRMDATAHDR_BYTE2_MASK (EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \
84 EM25XX_FRMDATAHDR_BYTE2_FRAME_END | \
85 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID)
88 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
89 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
90 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
92 module_param_array(video_nr, int, NULL, 0444);
93 module_param_array(vbi_nr, int, NULL, 0444);
94 module_param_array(radio_nr, int, NULL, 0444);
95 MODULE_PARM_DESC(video_nr, "video device numbers");
96 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
97 MODULE_PARM_DESC(radio_nr, "radio device numbers");
99 static unsigned int video_debug;
100 module_param(video_debug, int, 0644);
101 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
103 /* supported video standards */
104 static struct em28xx_fmt format[] = {
106 .name = "16 bpp YUY2, 4:2:2, packed",
107 .fourcc = V4L2_PIX_FMT_YUYV,
109 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V,
111 .name = "16 bpp RGB 565, LE",
112 .fourcc = V4L2_PIX_FMT_RGB565,
114 .reg = EM28XX_OUTFMT_RGB_16_656,
116 .name = "8 bpp Bayer BGBG..GRGR",
117 .fourcc = V4L2_PIX_FMT_SBGGR8,
119 .reg = EM28XX_OUTFMT_RGB_8_BGBG,
121 .name = "8 bpp Bayer GRGR..BGBG",
122 .fourcc = V4L2_PIX_FMT_SGRBG8,
124 .reg = EM28XX_OUTFMT_RGB_8_GRGR,
126 .name = "8 bpp Bayer GBGB..RGRG",
127 .fourcc = V4L2_PIX_FMT_SGBRG8,
129 .reg = EM28XX_OUTFMT_RGB_8_GBGB,
131 .name = "12 bpp YUV411",
132 .fourcc = V4L2_PIX_FMT_YUV411P,
134 .reg = EM28XX_OUTFMT_YUV411,
138 /* ------------------------------------------------------------------
139 DMA and thread functions
140 ------------------------------------------------------------------*/
143 * Finish the current buffer
145 static inline void finish_buffer(struct em28xx *dev,
146 struct em28xx_buffer *buf)
148 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
150 buf->vb.v4l2_buf.sequence = dev->field_count++;
151 buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
152 v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
154 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE);
158 * Copy picture data from USB buffer to videobuf buffer
160 static void em28xx_copy_video(struct em28xx *dev,
161 struct em28xx_buffer *buf,
162 unsigned char *usb_buf,
165 void *fieldstart, *startwrite, *startread;
166 int linesdone, currlinedone, offset, lencopy, remain;
167 int bytesperline = dev->width << 1;
169 if (buf->pos + len > buf->length)
170 len = buf->length - buf->pos;
175 if (dev->progressive || buf->top_field)
176 fieldstart = buf->vb_buf;
177 else /* interlaced mode, even nr. of lines */
178 fieldstart = buf->vb_buf + bytesperline;
180 linesdone = buf->pos / bytesperline;
181 currlinedone = buf->pos % bytesperline;
183 if (dev->progressive)
184 offset = linesdone * bytesperline + currlinedone;
186 offset = linesdone * bytesperline * 2 + currlinedone;
188 startwrite = fieldstart + offset;
189 lencopy = bytesperline - currlinedone;
190 lencopy = lencopy > remain ? remain : lencopy;
192 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) {
193 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
194 ((char *)startwrite + lencopy) -
195 ((char *)buf->vb_buf + buf->length));
196 remain = (char *)buf->vb_buf + buf->length -
202 memcpy(startwrite, startread, lencopy);
207 if (dev->progressive)
208 startwrite += lencopy;
210 startwrite += lencopy + bytesperline;
211 startread += lencopy;
212 if (bytesperline > remain)
215 lencopy = bytesperline;
217 if ((char *)startwrite + lencopy > (char *)buf->vb_buf +
219 em28xx_isocdbg("Overflow of %zi bytes past buffer end"
221 ((char *)startwrite + lencopy) -
222 ((char *)buf->vb_buf + buf->length));
223 lencopy = remain = (char *)buf->vb_buf + buf->length -
229 memcpy(startwrite, startread, lencopy);
238 * Copy VBI data from USB buffer to videobuf buffer
240 static void em28xx_copy_vbi(struct em28xx *dev,
241 struct em28xx_buffer *buf,
242 unsigned char *usb_buf,
247 if (buf->pos + len > buf->length)
248 len = buf->length - buf->pos;
251 /* Make sure the bottom field populates the second half of the frame */
252 if (buf->top_field == 0)
253 offset += dev->vbi_width * dev->vbi_height;
255 memcpy(buf->vb_buf + offset, usb_buf, len);
259 static inline void print_err_status(struct em28xx *dev,
260 int packet, int status)
262 char *errmsg = "Unknown";
266 errmsg = "unlinked synchronuously";
269 errmsg = "unlinked asynchronuously";
272 errmsg = "Buffer error (overrun)";
275 errmsg = "Stalled (device not responding)";
278 errmsg = "Babble (bad cable?)";
281 errmsg = "Bit-stuff error (bad cable?)";
284 errmsg = "CRC/Timeout (could be anything)";
287 errmsg = "Device does not respond";
291 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
293 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
294 packet, status, errmsg);
299 * get the next available buffer from dma queue
301 static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev,
302 struct em28xx_dmaqueue *dma_q)
304 struct em28xx_buffer *buf;
306 if (list_empty(&dma_q->active)) {
307 em28xx_isocdbg("No active queue to serve\n");
311 /* Get the next buffer */
312 buf = list_entry(dma_q->active.next, struct em28xx_buffer, list);
313 /* Cleans up buffer - Useful for testing for frame/URB loss */
314 list_del(&buf->list);
316 buf->vb_buf = buf->mem;
322 * Finish the current buffer if completed and prepare for the next field
324 static struct em28xx_buffer *
325 finish_field_prepare_next(struct em28xx *dev,
326 struct em28xx_buffer *buf,
327 struct em28xx_dmaqueue *dma_q)
329 if (dev->progressive || dev->top_field) { /* Brand new frame */
331 finish_buffer(dev, buf);
332 buf = get_next_buf(dev, dma_q);
335 buf->top_field = dev->top_field;
343 * Process data packet according to the em2710/em2750/em28xx frame data format
345 static inline void process_frame_data_em28xx(struct em28xx *dev,
346 unsigned char *data_pkt,
347 unsigned int data_len)
349 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
350 struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf;
351 struct em28xx_dmaqueue *dma_q = &dev->vidq;
352 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
354 /* capture type 0 = vbi start
355 capture type 1 = vbi in progress
356 capture type 2 = video start
357 capture type 3 = video in progress */
359 /* NOTE: Headers are always 4 bytes and
360 * never split across packets */
361 if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 &&
362 data_pkt[2] == 0x88 && data_pkt[3] == 0x88) {
366 } else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) {
367 /* Field start (VBI mode) */
368 dev->capture_type = 0;
370 em28xx_isocdbg("VBI START HEADER !!!\n");
371 dev->top_field = !(data_pkt[2] & 1);
374 } else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) {
375 /* Field start (VBI disabled) */
376 dev->capture_type = 2;
377 em28xx_isocdbg("VIDEO START HEADER !!!\n");
378 dev->top_field = !(data_pkt[2] & 1);
383 /* NOTE: With bulk transfers, intermediate data packets
384 * have no continuation header */
386 if (dev->capture_type == 0) {
387 vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q);
388 dev->usb_ctl.vbi_buf = vbi_buf;
389 dev->capture_type = 1;
392 if (dev->capture_type == 1) {
393 int vbi_size = dev->vbi_width * dev->vbi_height;
394 int vbi_data_len = ((dev->vbi_read + data_len) > vbi_size) ?
395 (vbi_size - dev->vbi_read) : data_len;
399 em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len);
400 dev->vbi_read += vbi_data_len;
402 if (vbi_data_len < data_len) {
403 /* Continue with copying video data */
404 dev->capture_type = 2;
405 data_pkt += vbi_data_len;
406 data_len -= vbi_data_len;
410 if (dev->capture_type == 2) {
411 buf = finish_field_prepare_next(dev, buf, dma_q);
412 dev->usb_ctl.vid_buf = buf;
413 dev->capture_type = 3;
416 if (dev->capture_type == 3 && buf != NULL && data_len > 0)
417 em28xx_copy_video(dev, buf, data_pkt, data_len);
421 * Process data packet according to the em25xx/em276x/7x/8x frame data format
423 static inline void process_frame_data_em25xx(struct em28xx *dev,
424 unsigned char *data_pkt,
425 unsigned int data_len)
427 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
428 struct em28xx_dmaqueue *dmaq = &dev->vidq;
431 /* Check for header */
432 /* NOTE: at least with bulk transfers, only the first packet
433 * has a header and has always set the FRAME_END bit */
434 if (data_len >= 2) { /* em25xx header is only 2 bytes long */
435 if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) &&
436 ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) {
437 dev->top_field = !(data_pkt[1] &
438 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID);
439 frame_end = data_pkt[1] &
440 EM25XX_FRMDATAHDR_BYTE2_FRAME_END;
445 /* Finish field and prepare next (BULK only) */
446 if (dev->analog_xfer_bulk && frame_end) {
447 buf = finish_field_prepare_next(dev, buf, dmaq);
448 dev->usb_ctl.vid_buf = buf;
450 /* NOTE: in ISOC mode when a new frame starts and buf==NULL,
451 * we COULD already prepare a buffer here to avoid skipping the
457 if (buf != NULL && data_len > 0)
458 em28xx_copy_video(dev, buf, data_pkt, data_len);
460 /* Finish frame (ISOC only) => avoids lag of 1 frame */
461 if (!dev->analog_xfer_bulk && frame_end) {
462 buf = finish_field_prepare_next(dev, buf, dmaq);
463 dev->usb_ctl.vid_buf = buf;
466 /* NOTE: Tested with USB bulk transfers only !
467 * The wording in the datasheet suggests that isoc might work different.
468 * The current code assumes that with isoc transfers each packet has a
469 * header like with the other em28xx devices.
471 /* NOTE: Support for interlaced mode is pure theory. It has not been
472 * tested and it is unknown if these devices actually support it. */
473 /* NOTE: No VBI support yet (these chips likely do not support VBI). */
476 /* Processes and copies the URB data content (video and VBI data) */
477 static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb)
479 int xfer_bulk, num_packets, i;
480 unsigned char *usb_data_pkt;
481 unsigned int usb_data_len;
486 if (dev->disconnected)
490 print_err_status(dev, -1, urb->status);
492 xfer_bulk = usb_pipebulk(urb->pipe);
494 if (xfer_bulk) /* bulk */
497 num_packets = urb->number_of_packets;
499 for (i = 0; i < num_packets; i++) {
500 if (xfer_bulk) { /* bulk */
501 usb_data_len = urb->actual_length;
503 usb_data_pkt = urb->transfer_buffer;
505 if (urb->iso_frame_desc[i].status < 0) {
506 print_err_status(dev, i,
507 urb->iso_frame_desc[i].status);
508 if (urb->iso_frame_desc[i].status != -EPROTO)
512 usb_data_len = urb->iso_frame_desc[i].actual_length;
513 if (usb_data_len > dev->max_pkt_size) {
514 em28xx_isocdbg("packet bigger than packet size");
518 usb_data_pkt = urb->transfer_buffer +
519 urb->iso_frame_desc[i].offset;
522 if (usb_data_len == 0) {
523 /* NOTE: happens very often with isoc transfers */
524 /* em28xx_usbdbg("packet %d is empty",i); - spammy */
529 process_frame_data_em25xx(dev,
530 usb_data_pkt, usb_data_len);
532 process_frame_data_em28xx(dev,
533 usb_data_pkt, usb_data_len);
540 static int get_ressource(enum v4l2_buf_type f_type)
543 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
544 return EM28XX_RESOURCE_VIDEO;
545 case V4L2_BUF_TYPE_VBI_CAPTURE:
546 return EM28XX_RESOURCE_VBI;
553 /* Usage lock check functions */
554 static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type)
556 int res_type = get_ressource(f_type);
559 if (dev->resources & res_type) {
560 /* no, someone else uses it */
564 /* it's free, grab it */
565 dev->resources |= res_type;
566 em28xx_videodbg("res: get %d\n", res_type);
570 static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type)
572 int res_type = get_ressource(f_type);
574 dev->resources &= ~res_type;
575 em28xx_videodbg("res: put %d\n", res_type);
578 /* ------------------------------------------------------------------
580 ------------------------------------------------------------------*/
582 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
583 unsigned int *nbuffers, unsigned int *nplanes,
584 unsigned int sizes[], void *alloc_ctxs[])
586 struct em28xx *dev = vb2_get_drv_priv(vq);
590 size = fmt->fmt.pix.sizeimage;
592 size = (dev->width * dev->height * dev->format->depth + 7) >> 3;
607 buffer_prepare(struct vb2_buffer *vb)
609 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
610 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
613 em28xx_videodbg("%s, field=%d\n", __func__, vb->v4l2_buf.field);
615 size = (dev->width * dev->height * dev->format->depth + 7) >> 3;
617 if (vb2_plane_size(vb, 0) < size) {
618 em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n",
619 __func__, vb2_plane_size(vb, 0), size);
622 vb2_set_plane_payload(&buf->vb, 0, size);
627 int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
629 struct em28xx *dev = vb2_get_drv_priv(vq);
630 struct v4l2_frequency f;
633 em28xx_videodbg("%s\n", __func__);
635 /* Make sure streaming is not already in progress for this type
636 of filehandle (e.g. video, vbi) */
637 rc = res_get(dev, vq->type);
641 if (dev->streaming_users == 0) {
642 /* First active streaming user, so allocate all the URBs */
644 /* Allocate the USB bandwidth */
645 em28xx_set_alternate(dev);
647 /* Needed, since GPIO might have disabled power of
650 em28xx_wake_i2c(dev);
652 dev->capture_type = -1;
653 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE,
654 dev->analog_xfer_bulk,
657 dev->packet_multiplier,
658 em28xx_urb_data_copy);
663 * djh: it's not clear whether this code is still needed. I'm
664 * leaving it in here for now entirely out of concern for
665 * backward compatibility (the old code did it)
668 /* Ask tuner to go to analog or radio mode */
669 memset(&f, 0, sizeof(f));
670 f.frequency = dev->ctl_freq;
671 if (vq->owner && vq->owner->vdev->vfl_type == VFL_TYPE_RADIO)
672 f.type = V4L2_TUNER_RADIO;
674 f.type = V4L2_TUNER_ANALOG_TV;
675 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
678 dev->streaming_users++;
683 static int em28xx_stop_streaming(struct vb2_queue *vq)
685 struct em28xx *dev = vb2_get_drv_priv(vq);
686 struct em28xx_dmaqueue *vidq = &dev->vidq;
687 unsigned long flags = 0;
689 em28xx_videodbg("%s\n", __func__);
691 res_free(dev, vq->type);
693 if (dev->streaming_users-- == 1) {
694 /* Last active user, so shutdown all the URBS */
695 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
698 spin_lock_irqsave(&dev->slock, flags);
699 while (!list_empty(&vidq->active)) {
700 struct em28xx_buffer *buf;
701 buf = list_entry(vidq->active.next, struct em28xx_buffer, list);
702 list_del(&buf->list);
703 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
705 dev->usb_ctl.vid_buf = NULL;
706 spin_unlock_irqrestore(&dev->slock, flags);
711 int em28xx_stop_vbi_streaming(struct vb2_queue *vq)
713 struct em28xx *dev = vb2_get_drv_priv(vq);
714 struct em28xx_dmaqueue *vbiq = &dev->vbiq;
715 unsigned long flags = 0;
717 em28xx_videodbg("%s\n", __func__);
719 res_free(dev, vq->type);
721 if (dev->streaming_users-- == 1) {
722 /* Last active user, so shutdown all the URBS */
723 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
726 spin_lock_irqsave(&dev->slock, flags);
727 while (!list_empty(&vbiq->active)) {
728 struct em28xx_buffer *buf;
729 buf = list_entry(vbiq->active.next, struct em28xx_buffer, list);
730 list_del(&buf->list);
731 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
733 dev->usb_ctl.vbi_buf = NULL;
734 spin_unlock_irqrestore(&dev->slock, flags);
740 buffer_queue(struct vb2_buffer *vb)
742 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
743 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
744 struct em28xx_dmaqueue *vidq = &dev->vidq;
745 unsigned long flags = 0;
747 em28xx_videodbg("%s\n", __func__);
748 buf->mem = vb2_plane_vaddr(vb, 0);
749 buf->length = vb2_plane_size(vb, 0);
751 spin_lock_irqsave(&dev->slock, flags);
752 list_add_tail(&buf->list, &vidq->active);
753 spin_unlock_irqrestore(&dev->slock, flags);
756 static struct vb2_ops em28xx_video_qops = {
757 .queue_setup = queue_setup,
758 .buf_prepare = buffer_prepare,
759 .buf_queue = buffer_queue,
760 .start_streaming = em28xx_start_analog_streaming,
761 .stop_streaming = em28xx_stop_streaming,
762 .wait_prepare = vb2_ops_wait_prepare,
763 .wait_finish = vb2_ops_wait_finish,
766 int em28xx_vb2_setup(struct em28xx *dev)
771 /* Setup Videobuf2 for Video capture */
773 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
774 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
775 q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
777 q->buf_struct_size = sizeof(struct em28xx_buffer);
778 q->ops = &em28xx_video_qops;
779 q->mem_ops = &vb2_vmalloc_memops;
781 rc = vb2_queue_init(q);
785 /* Setup Videobuf2 for VBI capture */
787 q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
788 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
789 q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
791 q->buf_struct_size = sizeof(struct em28xx_buffer);
792 q->ops = &em28xx_vbi_qops;
793 q->mem_ops = &vb2_vmalloc_memops;
795 rc = vb2_queue_init(q);
802 /********************* v4l2 interface **************************************/
804 static void video_mux(struct em28xx *dev, int index)
806 dev->ctl_input = index;
807 dev->ctl_ainput = INPUT(index)->amux;
808 dev->ctl_aoutput = INPUT(index)->aout;
810 if (!dev->ctl_aoutput)
811 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
813 v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
814 INPUT(index)->vmux, 0, 0);
816 if (dev->board.has_msp34xx) {
817 if (dev->i2s_speed) {
818 v4l2_device_call_all(&dev->v4l2_dev, 0, audio,
819 s_i2s_clock_freq, dev->i2s_speed);
821 /* Note: this is msp3400 specific */
822 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
823 dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
826 if (dev->board.adecoder != EM28XX_NOADECODER) {
827 v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
828 dev->ctl_ainput, dev->ctl_aoutput, 0);
831 em28xx_audio_analog_set(dev);
834 void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv)
836 struct em28xx *dev = priv;
839 * In the case of non-AC97 volume controls, we still need
840 * to do some setups at em28xx, in order to mute/unmute
841 * and to adjust audio volume. However, the value ranges
842 * should be checked by the corresponding V4L subdriver.
845 case V4L2_CID_AUDIO_MUTE:
846 dev->mute = ctrl->val;
847 em28xx_audio_analog_set(dev);
849 case V4L2_CID_AUDIO_VOLUME:
850 dev->volume = ctrl->val;
851 em28xx_audio_analog_set(dev);
856 static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl)
858 struct em28xx *dev = container_of(ctrl->handler, struct em28xx, ctrl_handler);
862 case V4L2_CID_AUDIO_MUTE:
863 dev->mute = ctrl->val;
864 ret = em28xx_audio_analog_set(dev);
866 case V4L2_CID_AUDIO_VOLUME:
867 dev->volume = ctrl->val;
868 ret = em28xx_audio_analog_set(dev);
870 case V4L2_CID_CONTRAST:
871 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val);
873 case V4L2_CID_BRIGHTNESS:
874 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val);
876 case V4L2_CID_SATURATION:
877 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val);
879 case V4L2_CID_BLUE_BALANCE:
880 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val);
882 case V4L2_CID_RED_BALANCE:
883 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val);
885 case V4L2_CID_SHARPNESS:
886 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val);
890 return (ret < 0) ? ret : 0;
893 const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
894 .s_ctrl = em28xx_s_ctrl,
897 static void size_to_scale(struct em28xx *dev,
898 unsigned int width, unsigned int height,
899 unsigned int *hscale, unsigned int *vscale)
901 unsigned int maxw = norm_maxw(dev);
902 unsigned int maxh = norm_maxh(dev);
904 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
905 if (*hscale > EM28XX_HVSCALE_MAX)
906 *hscale = EM28XX_HVSCALE_MAX;
908 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
909 if (*vscale > EM28XX_HVSCALE_MAX)
910 *vscale = EM28XX_HVSCALE_MAX;
913 static void scale_to_size(struct em28xx *dev,
914 unsigned int hscale, unsigned int vscale,
915 unsigned int *width, unsigned int *height)
917 unsigned int maxw = norm_maxw(dev);
918 unsigned int maxh = norm_maxh(dev);
920 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
921 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
924 /* ------------------------------------------------------------------
925 IOCTL vidioc handling
926 ------------------------------------------------------------------*/
928 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
929 struct v4l2_format *f)
931 struct em28xx_fh *fh = priv;
932 struct em28xx *dev = fh->dev;
934 f->fmt.pix.width = dev->width;
935 f->fmt.pix.height = dev->height;
936 f->fmt.pix.pixelformat = dev->format->fourcc;
937 f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
938 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height;
939 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
941 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
942 if (dev->progressive)
943 f->fmt.pix.field = V4L2_FIELD_NONE;
945 f->fmt.pix.field = dev->interlaced ?
946 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
950 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
954 for (i = 0; i < ARRAY_SIZE(format); i++)
955 if (format[i].fourcc == fourcc)
961 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
962 struct v4l2_format *f)
964 struct em28xx_fh *fh = priv;
965 struct em28xx *dev = fh->dev;
966 unsigned int width = f->fmt.pix.width;
967 unsigned int height = f->fmt.pix.height;
968 unsigned int maxw = norm_maxw(dev);
969 unsigned int maxh = norm_maxh(dev);
970 unsigned int hscale, vscale;
971 struct em28xx_fmt *fmt;
973 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
975 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
976 f->fmt.pix.pixelformat);
980 if (dev->board.is_em2800) {
981 /* the em2800 can only scale down to 50% */
982 height = height > (3 * maxh / 4) ? maxh : maxh / 2;
983 width = width > (3 * maxw / 4) ? maxw : maxw / 2;
985 * MaxPacketSize for em2800 is too small to capture at full
986 * resolution use half of maxw as the scaler can only scale
989 if (width == maxw && height == maxh)
992 /* width must even because of the YUYV format
993 height must be even because of interlacing */
994 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
998 size_to_scale(dev, width, height, &hscale, &vscale);
999 scale_to_size(dev, hscale, vscale, &width, &height);
1001 f->fmt.pix.width = width;
1002 f->fmt.pix.height = height;
1003 f->fmt.pix.pixelformat = fmt->fourcc;
1004 f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
1005 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
1006 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1007 if (dev->progressive)
1008 f->fmt.pix.field = V4L2_FIELD_NONE;
1010 f->fmt.pix.field = dev->interlaced ?
1011 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
1012 f->fmt.pix.priv = 0;
1017 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
1018 unsigned width, unsigned height)
1020 struct em28xx_fmt *fmt;
1022 fmt = format_by_fourcc(fourcc);
1028 dev->height = height;
1030 /* set new image size */
1031 size_to_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1033 em28xx_resolution_set(dev);
1038 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1039 struct v4l2_format *f)
1041 struct em28xx *dev = video_drvdata(file);
1043 if (dev->streaming_users > 0)
1046 vidioc_try_fmt_vid_cap(file, priv, f);
1048 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
1049 f->fmt.pix.width, f->fmt.pix.height);
1052 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1054 struct em28xx_fh *fh = priv;
1055 struct em28xx *dev = fh->dev;
1062 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
1064 struct em28xx_fh *fh = priv;
1065 struct em28xx *dev = fh->dev;
1067 v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm);
1072 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
1074 struct em28xx_fh *fh = priv;
1075 struct em28xx *dev = fh->dev;
1076 struct v4l2_format f;
1078 if (norm == dev->norm)
1081 if (dev->streaming_users > 0)
1086 /* Adjusts width/height, if needed */
1087 f.fmt.pix.width = 720;
1088 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576;
1089 vidioc_try_fmt_vid_cap(file, priv, &f);
1091 /* set new image size */
1092 dev->width = f.fmt.pix.width;
1093 dev->height = f.fmt.pix.height;
1094 size_to_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1096 em28xx_resolution_set(dev);
1097 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
1102 static int vidioc_g_parm(struct file *file, void *priv,
1103 struct v4l2_streamparm *p)
1105 struct em28xx_fh *fh = priv;
1106 struct em28xx *dev = fh->dev;
1109 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1110 if (dev->board.is_webcam)
1111 rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
1114 v4l2_video_std_frame_period(dev->norm,
1115 &p->parm.capture.timeperframe);
1120 static int vidioc_s_parm(struct file *file, void *priv,
1121 struct v4l2_streamparm *p)
1123 struct em28xx_fh *fh = priv;
1124 struct em28xx *dev = fh->dev;
1126 p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1127 return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
1130 static const char *iname[] = {
1131 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1132 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1133 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1134 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1135 [EM28XX_VMUX_SVIDEO] = "S-Video",
1136 [EM28XX_VMUX_TELEVISION] = "Television",
1137 [EM28XX_VMUX_CABLE] = "Cable TV",
1138 [EM28XX_VMUX_DVB] = "DVB",
1139 [EM28XX_VMUX_DEBUG] = "for debug only",
1142 static int vidioc_enum_input(struct file *file, void *priv,
1143 struct v4l2_input *i)
1145 struct em28xx_fh *fh = priv;
1146 struct em28xx *dev = fh->dev;
1150 if (n >= MAX_EM28XX_INPUT)
1152 if (0 == INPUT(n)->type)
1156 i->type = V4L2_INPUT_TYPE_CAMERA;
1158 strcpy(i->name, iname[INPUT(n)->type]);
1160 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1161 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1162 i->type = V4L2_INPUT_TYPE_TUNER;
1164 i->std = dev->vdev->tvnorms;
1165 /* webcams do not have the STD API */
1166 if (dev->board.is_webcam)
1167 i->capabilities = 0;
1172 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1174 struct em28xx_fh *fh = priv;
1175 struct em28xx *dev = fh->dev;
1177 *i = dev->ctl_input;
1182 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1184 struct em28xx_fh *fh = priv;
1185 struct em28xx *dev = fh->dev;
1187 if (i >= MAX_EM28XX_INPUT)
1189 if (0 == INPUT(i)->type)
1196 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1198 struct em28xx_fh *fh = priv;
1199 struct em28xx *dev = fh->dev;
1202 case EM28XX_AMUX_VIDEO:
1203 strcpy(a->name, "Television");
1205 case EM28XX_AMUX_LINE_IN:
1206 strcpy(a->name, "Line In");
1208 case EM28XX_AMUX_VIDEO2:
1209 strcpy(a->name, "Television alt");
1211 case EM28XX_AMUX_PHONE:
1212 strcpy(a->name, "Phone");
1214 case EM28XX_AMUX_MIC:
1215 strcpy(a->name, "Mic");
1217 case EM28XX_AMUX_CD:
1218 strcpy(a->name, "CD");
1220 case EM28XX_AMUX_AUX:
1221 strcpy(a->name, "Aux");
1223 case EM28XX_AMUX_PCM_OUT:
1224 strcpy(a->name, "PCM");
1230 a->index = dev->ctl_ainput;
1231 a->capability = V4L2_AUDCAP_STEREO;
1236 static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a)
1238 struct em28xx_fh *fh = priv;
1239 struct em28xx *dev = fh->dev;
1241 if (a->index >= MAX_EM28XX_INPUT)
1243 if (0 == INPUT(a->index)->type)
1246 dev->ctl_ainput = INPUT(a->index)->amux;
1247 dev->ctl_aoutput = INPUT(a->index)->aout;
1249 if (!dev->ctl_aoutput)
1250 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1255 static int vidioc_g_tuner(struct file *file, void *priv,
1256 struct v4l2_tuner *t)
1258 struct em28xx_fh *fh = priv;
1259 struct em28xx *dev = fh->dev;
1264 strcpy(t->name, "Tuner");
1266 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1270 static int vidioc_s_tuner(struct file *file, void *priv,
1271 const struct v4l2_tuner *t)
1273 struct em28xx_fh *fh = priv;
1274 struct em28xx *dev = fh->dev;
1279 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1283 static int vidioc_g_frequency(struct file *file, void *priv,
1284 struct v4l2_frequency *f)
1286 struct em28xx_fh *fh = priv;
1287 struct em28xx *dev = fh->dev;
1292 f->frequency = dev->ctl_freq;
1296 static int vidioc_s_frequency(struct file *file, void *priv,
1297 const struct v4l2_frequency *f)
1299 struct v4l2_frequency new_freq = *f;
1300 struct em28xx_fh *fh = priv;
1301 struct em28xx *dev = fh->dev;
1306 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
1307 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_frequency, &new_freq);
1308 dev->ctl_freq = new_freq.frequency;
1313 #ifdef CONFIG_VIDEO_ADV_DEBUG
1314 static int vidioc_g_chip_info(struct file *file, void *priv,
1315 struct v4l2_dbg_chip_info *chip)
1317 struct em28xx_fh *fh = priv;
1318 struct em28xx *dev = fh->dev;
1320 if (chip->match.addr > 1)
1322 if (chip->match.addr == 1)
1323 strlcpy(chip->name, "ac97", sizeof(chip->name));
1325 strlcpy(chip->name, dev->v4l2_dev.name, sizeof(chip->name));
1329 static int em28xx_reg_len(int reg)
1332 case EM28XX_R40_AC97LSB:
1333 case EM28XX_R30_HSCALELOW:
1334 case EM28XX_R32_VSCALELOW:
1341 static int vidioc_g_register(struct file *file, void *priv,
1342 struct v4l2_dbg_register *reg)
1344 struct em28xx_fh *fh = priv;
1345 struct em28xx *dev = fh->dev;
1348 if (reg->match.addr > 1)
1350 if (reg->match.addr) {
1351 ret = em28xx_read_ac97(dev, reg->reg);
1361 reg->size = em28xx_reg_len(reg->reg);
1362 if (reg->size == 1) {
1363 ret = em28xx_read_reg(dev, reg->reg);
1371 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1372 reg->reg, (char *)&val, 2);
1376 reg->val = le16_to_cpu(val);
1382 static int vidioc_s_register(struct file *file, void *priv,
1383 const struct v4l2_dbg_register *reg)
1385 struct em28xx_fh *fh = priv;
1386 struct em28xx *dev = fh->dev;
1389 if (reg->match.addr > 1)
1391 if (reg->match.addr)
1392 return em28xx_write_ac97(dev, reg->reg, reg->val);
1395 buf = cpu_to_le16(reg->val);
1397 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1398 em28xx_reg_len(reg->reg));
1403 static int vidioc_querycap(struct file *file, void *priv,
1404 struct v4l2_capability *cap)
1406 struct video_device *vdev = video_devdata(file);
1407 struct em28xx_fh *fh = priv;
1408 struct em28xx *dev = fh->dev;
1410 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1411 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1412 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1414 if (vdev->vfl_type == VFL_TYPE_GRABBER)
1415 cap->device_caps = V4L2_CAP_READWRITE |
1416 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1417 else if (vdev->vfl_type == VFL_TYPE_RADIO)
1418 cap->device_caps = V4L2_CAP_RADIO;
1420 cap->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE;
1422 if (dev->audio_mode.has_audio)
1423 cap->device_caps |= V4L2_CAP_AUDIO;
1425 if (dev->tuner_type != TUNER_ABSENT)
1426 cap->device_caps |= V4L2_CAP_TUNER;
1428 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS |
1429 V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1431 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1433 cap->capabilities |= V4L2_CAP_RADIO;
1437 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1438 struct v4l2_fmtdesc *f)
1440 if (unlikely(f->index >= ARRAY_SIZE(format)))
1443 strlcpy(f->description, format[f->index].name, sizeof(f->description));
1444 f->pixelformat = format[f->index].fourcc;
1449 static int vidioc_enum_framesizes(struct file *file, void *priv,
1450 struct v4l2_frmsizeenum *fsize)
1452 struct em28xx_fh *fh = priv;
1453 struct em28xx *dev = fh->dev;
1454 struct em28xx_fmt *fmt;
1455 unsigned int maxw = norm_maxw(dev);
1456 unsigned int maxh = norm_maxh(dev);
1458 fmt = format_by_fourcc(fsize->pixel_format);
1460 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
1461 fsize->pixel_format);
1465 if (dev->board.is_em2800) {
1466 if (fsize->index > 1)
1468 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1469 fsize->discrete.width = maxw / (1 + fsize->index);
1470 fsize->discrete.height = maxh / (1 + fsize->index);
1474 if (fsize->index != 0)
1477 /* Report a continuous range */
1478 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
1479 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
1480 &fsize->stepwise.min_width, &fsize->stepwise.min_height);
1481 if (fsize->stepwise.min_width < 48)
1482 fsize->stepwise.min_width = 48;
1483 if (fsize->stepwise.min_height < 38)
1484 fsize->stepwise.min_height = 38;
1485 fsize->stepwise.max_width = maxw;
1486 fsize->stepwise.max_height = maxh;
1487 fsize->stepwise.step_width = 1;
1488 fsize->stepwise.step_height = 1;
1492 /* RAW VBI ioctls */
1494 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1495 struct v4l2_format *format)
1497 struct em28xx_fh *fh = priv;
1498 struct em28xx *dev = fh->dev;
1500 format->fmt.vbi.samples_per_line = dev->vbi_width;
1501 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1502 format->fmt.vbi.offset = 0;
1503 format->fmt.vbi.flags = 0;
1504 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1505 format->fmt.vbi.count[0] = dev->vbi_height;
1506 format->fmt.vbi.count[1] = dev->vbi_height;
1507 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
1509 /* Varies by video standard (NTSC, PAL, etc.) */
1510 if (dev->norm & V4L2_STD_525_60) {
1512 format->fmt.vbi.start[0] = 10;
1513 format->fmt.vbi.start[1] = 273;
1514 } else if (dev->norm & V4L2_STD_625_50) {
1516 format->fmt.vbi.start[0] = 6;
1517 format->fmt.vbi.start[1] = 318;
1523 /* ----------------------------------------------------------- */
1524 /* RADIO ESPECIFIC IOCTLS */
1525 /* ----------------------------------------------------------- */
1527 static int radio_g_tuner(struct file *file, void *priv,
1528 struct v4l2_tuner *t)
1530 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1532 if (unlikely(t->index > 0))
1535 strcpy(t->name, "Radio");
1537 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1542 static int radio_s_tuner(struct file *file, void *priv,
1543 const struct v4l2_tuner *t)
1545 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1550 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1556 * em28xx_v4l2_open()
1557 * inits the device and starts isoc transfer
1559 static int em28xx_v4l2_open(struct file *filp)
1561 struct video_device *vdev = video_devdata(filp);
1562 struct em28xx *dev = video_drvdata(filp);
1563 enum v4l2_buf_type fh_type = 0;
1564 struct em28xx_fh *fh;
1566 switch (vdev->vfl_type) {
1567 case VFL_TYPE_GRABBER:
1568 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1571 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1575 em28xx_videodbg("open dev=%s type=%s users=%d\n",
1576 video_device_node_name(vdev), v4l2_type_names[fh_type],
1580 if (mutex_lock_interruptible(&dev->lock))
1581 return -ERESTARTSYS;
1582 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1584 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1585 mutex_unlock(&dev->lock);
1588 v4l2_fh_init(&fh->fh, vdev);
1591 filp->private_data = fh;
1593 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1594 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
1595 em28xx_resolution_set(dev);
1597 /* Needed, since GPIO might have disabled power of
1600 em28xx_wake_i2c(dev);
1604 if (vdev->vfl_type == VFL_TYPE_RADIO) {
1605 em28xx_videodbg("video_open: setting radio device\n");
1606 v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio);
1611 mutex_unlock(&dev->lock);
1612 v4l2_fh_add(&fh->fh);
1618 * em28xx_realease_resources()
1619 * unregisters the v4l2,i2c and usb devices
1620 * called when the device gets disconected or at module unload
1622 void em28xx_release_analog_resources(struct em28xx *dev)
1625 /*FIXME: I2C IR should be disconnected */
1627 if (dev->radio_dev) {
1628 if (video_is_registered(dev->radio_dev))
1629 video_unregister_device(dev->radio_dev);
1631 video_device_release(dev->radio_dev);
1632 dev->radio_dev = NULL;
1635 em28xx_info("V4L2 device %s deregistered\n",
1636 video_device_node_name(dev->vbi_dev));
1637 if (video_is_registered(dev->vbi_dev))
1638 video_unregister_device(dev->vbi_dev);
1640 video_device_release(dev->vbi_dev);
1641 dev->vbi_dev = NULL;
1644 em28xx_info("V4L2 device %s deregistered\n",
1645 video_device_node_name(dev->vdev));
1646 if (video_is_registered(dev->vdev))
1647 video_unregister_device(dev->vdev);
1649 video_device_release(dev->vdev);
1655 * em28xx_v4l2_close()
1656 * stops streaming and deallocates all resources allocated by the v4l2
1659 static int em28xx_v4l2_close(struct file *filp)
1661 struct em28xx_fh *fh = filp->private_data;
1662 struct em28xx *dev = fh->dev;
1665 em28xx_videodbg("users=%d\n", dev->users);
1667 mutex_lock(&dev->lock);
1668 vb2_fop_release(filp);
1670 if (dev->users == 1) {
1671 /* the device is already disconnect,
1672 free the remaining resources */
1673 if (dev->disconnected) {
1674 em28xx_release_resources(dev);
1675 kfree(dev->alt_max_pkt_size_isoc);
1676 mutex_unlock(&dev->lock);
1681 /* Save some power by putting tuner to sleep */
1682 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0);
1684 /* do this before setting alternate! */
1685 em28xx_set_mode(dev, EM28XX_SUSPEND);
1687 /* set alternate 0 */
1689 em28xx_videodbg("setting alternate 0\n");
1690 errCode = usb_set_interface(dev->udev, 0, 0);
1692 em28xx_errdev("cannot change alternate number to "
1693 "0 (error=%i)\n", errCode);
1698 mutex_unlock(&dev->lock);
1702 static const struct v4l2_file_operations em28xx_v4l_fops = {
1703 .owner = THIS_MODULE,
1704 .open = em28xx_v4l2_open,
1705 .release = em28xx_v4l2_close,
1706 .read = vb2_fop_read,
1707 .poll = vb2_fop_poll,
1708 .mmap = vb2_fop_mmap,
1709 .unlocked_ioctl = video_ioctl2,
1712 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1713 .vidioc_querycap = vidioc_querycap,
1714 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1715 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1716 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1717 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1718 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
1719 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
1720 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
1721 .vidioc_enum_framesizes = vidioc_enum_framesizes,
1722 .vidioc_g_audio = vidioc_g_audio,
1723 .vidioc_s_audio = vidioc_s_audio,
1725 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1726 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1727 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1728 .vidioc_querybuf = vb2_ioctl_querybuf,
1729 .vidioc_qbuf = vb2_ioctl_qbuf,
1730 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1732 .vidioc_g_std = vidioc_g_std,
1733 .vidioc_querystd = vidioc_querystd,
1734 .vidioc_s_std = vidioc_s_std,
1735 .vidioc_g_parm = vidioc_g_parm,
1736 .vidioc_s_parm = vidioc_s_parm,
1737 .vidioc_enum_input = vidioc_enum_input,
1738 .vidioc_g_input = vidioc_g_input,
1739 .vidioc_s_input = vidioc_s_input,
1740 .vidioc_streamon = vb2_ioctl_streamon,
1741 .vidioc_streamoff = vb2_ioctl_streamoff,
1742 .vidioc_g_tuner = vidioc_g_tuner,
1743 .vidioc_s_tuner = vidioc_s_tuner,
1744 .vidioc_g_frequency = vidioc_g_frequency,
1745 .vidioc_s_frequency = vidioc_s_frequency,
1746 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1747 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1748 #ifdef CONFIG_VIDEO_ADV_DEBUG
1749 .vidioc_g_chip_info = vidioc_g_chip_info,
1750 .vidioc_g_register = vidioc_g_register,
1751 .vidioc_s_register = vidioc_s_register,
1755 static const struct video_device em28xx_video_template = {
1756 .fops = &em28xx_v4l_fops,
1757 .release = video_device_release_empty,
1758 .ioctl_ops = &video_ioctl_ops,
1760 .tvnorms = V4L2_STD_ALL,
1763 static const struct v4l2_file_operations radio_fops = {
1764 .owner = THIS_MODULE,
1765 .open = em28xx_v4l2_open,
1766 .release = em28xx_v4l2_close,
1767 .unlocked_ioctl = video_ioctl2,
1770 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
1771 .vidioc_querycap = vidioc_querycap,
1772 .vidioc_g_tuner = radio_g_tuner,
1773 .vidioc_s_tuner = radio_s_tuner,
1774 .vidioc_g_frequency = vidioc_g_frequency,
1775 .vidioc_s_frequency = vidioc_s_frequency,
1776 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1777 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1778 #ifdef CONFIG_VIDEO_ADV_DEBUG
1779 .vidioc_g_chip_info = vidioc_g_chip_info,
1780 .vidioc_g_register = vidioc_g_register,
1781 .vidioc_s_register = vidioc_s_register,
1785 static struct video_device em28xx_radio_template = {
1786 .name = "em28xx-radio",
1787 .fops = &radio_fops,
1788 .ioctl_ops = &radio_ioctl_ops,
1791 /******************************** usb interface ******************************/
1795 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1796 const struct video_device *template,
1797 const char *type_name)
1799 struct video_device *vfd;
1801 vfd = video_device_alloc();
1806 vfd->v4l2_dev = &dev->v4l2_dev;
1807 vfd->debug = video_debug;
1808 vfd->lock = &dev->lock;
1809 set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
1810 if (dev->board.is_webcam)
1813 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1814 dev->name, type_name);
1816 video_set_drvdata(vfd, dev);
1820 int em28xx_register_analog_devices(struct em28xx *dev)
1826 printk(KERN_INFO "%s: v4l2 driver version %s\n",
1827 dev->name, EM28XX_VERSION);
1829 /* set default norm */
1830 dev->norm = V4L2_STD_PAL;
1831 v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
1832 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1834 /* Analog specific initialization */
1835 dev->format = &format[0];
1837 maxw = norm_maxw(dev);
1838 /* MaxPacketSize for em2800 is too small to capture at full resolution
1839 * use half of maxw as the scaler can only scale to 50% */
1840 if (dev->board.is_em2800)
1843 em28xx_set_video_format(dev, format[0].fourcc,
1844 maxw, norm_maxh(dev));
1848 /* Audio defaults */
1852 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
1853 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
1854 em28xx_write_reg(dev, EM28XX_R0F_XCLK,
1855 (EM28XX_XCLK_AUDIO_UNMUTE | val));
1857 em28xx_set_outfmt(dev);
1858 em28xx_compression_disable(dev);
1860 /* Add image controls */
1861 /* NOTE: at this point, the subdevices are already registered, so bridge
1862 * controls are only added/enabled when no subdevice provides them */
1863 if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_CONTRAST))
1864 v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops,
1866 0, 0x1f, 1, CONTRAST_DEFAULT);
1867 if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_BRIGHTNESS))
1868 v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops,
1869 V4L2_CID_BRIGHTNESS,
1870 -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT);
1871 if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_SATURATION))
1872 v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops,
1873 V4L2_CID_SATURATION,
1874 0, 0x1f, 1, SATURATION_DEFAULT);
1875 if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_BLUE_BALANCE))
1876 v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops,
1877 V4L2_CID_BLUE_BALANCE,
1878 -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT);
1879 if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_RED_BALANCE))
1880 v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops,
1881 V4L2_CID_RED_BALANCE,
1882 -0x30, 0x30, 1, RED_BALANCE_DEFAULT);
1883 if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_SHARPNESS))
1884 v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops,
1886 0, 0x0f, 1, SHARPNESS_DEFAULT);
1888 /* Reset image controls */
1889 em28xx_colorlevels_set_default(dev);
1890 v4l2_ctrl_handler_setup(&dev->ctrl_handler);
1891 if (dev->ctrl_handler.error)
1892 return dev->ctrl_handler.error;
1894 /* allocate and fill video video_device struct */
1895 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
1897 em28xx_errdev("cannot allocate video_device.\n");
1900 dev->vdev->queue = &dev->vb_vidq;
1901 dev->vdev->queue->lock = &dev->vb_queue_lock;
1903 /* disable inapplicable ioctls */
1904 if (dev->board.is_webcam) {
1905 v4l2_disable_ioctl(dev->vdev, VIDIOC_QUERYSTD);
1906 v4l2_disable_ioctl(dev->vdev, VIDIOC_G_STD);
1907 v4l2_disable_ioctl(dev->vdev, VIDIOC_S_STD);
1909 v4l2_disable_ioctl(dev->vdev, VIDIOC_S_PARM);
1911 if (dev->tuner_type == TUNER_ABSENT) {
1912 v4l2_disable_ioctl(dev->vdev, VIDIOC_G_TUNER);
1913 v4l2_disable_ioctl(dev->vdev, VIDIOC_S_TUNER);
1914 v4l2_disable_ioctl(dev->vdev, VIDIOC_G_FREQUENCY);
1915 v4l2_disable_ioctl(dev->vdev, VIDIOC_S_FREQUENCY);
1917 if (!dev->audio_mode.has_audio) {
1918 v4l2_disable_ioctl(dev->vdev, VIDIOC_G_AUDIO);
1919 v4l2_disable_ioctl(dev->vdev, VIDIOC_S_AUDIO);
1922 /* register v4l2 video video_device */
1923 ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1924 video_nr[dev->devno]);
1926 em28xx_errdev("unable to register video device (error=%i).\n",
1931 /* Allocate and fill vbi video_device struct */
1932 if (em28xx_vbi_supported(dev) == 1) {
1933 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
1936 dev->vbi_dev->queue = &dev->vb_vbiq;
1937 dev->vbi_dev->queue->lock = &dev->vb_vbi_queue_lock;
1939 /* disable inapplicable ioctls */
1940 v4l2_disable_ioctl(dev->vdev, VIDIOC_S_PARM);
1941 if (dev->tuner_type == TUNER_ABSENT) {
1942 v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_G_TUNER);
1943 v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_S_TUNER);
1944 v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_G_FREQUENCY);
1945 v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_S_FREQUENCY);
1947 if (!dev->audio_mode.has_audio) {
1948 v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_G_AUDIO);
1949 v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_S_AUDIO);
1952 /* register v4l2 vbi video_device */
1953 ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1954 vbi_nr[dev->devno]);
1956 em28xx_errdev("unable to register vbi device\n");
1961 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
1962 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
1964 if (!dev->radio_dev) {
1965 em28xx_errdev("cannot allocate video_device.\n");
1968 ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
1969 radio_nr[dev->devno]);
1971 em28xx_errdev("can't register radio device\n");
1974 em28xx_info("Registered radio device as %s\n",
1975 video_device_node_name(dev->radio_dev));
1978 em28xx_info("V4L2 video device registered as %s\n",
1979 video_device_node_name(dev->vdev));
1982 em28xx_info("V4L2 VBI device registered as %s\n",
1983 video_device_node_name(dev->vbi_dev));