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>
10 Some parts based on SN9C10x PC Camera Controllers GPL driver made
11 by Luca Risolia <luca.risolia@studio.unibo.it>
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 #include <linux/init.h>
29 #include <linux/list.h>
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/bitmap.h>
33 #include <linux/usb.h>
34 #include <linux/i2c.h>
35 #include <linux/version.h>
37 #include <linux/mutex.h>
40 #include <media/v4l2-common.h>
41 #include <media/msp3400.h>
42 #include <media/tuner.h>
44 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
45 "Markus Rechberger <mrechberger@gmail.com>, " \
46 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
47 "Sascha Sommer <saschasommer@freenet.de>"
49 #define DRIVER_NAME "em28xx"
50 #define DRIVER_DESC "Empia em28xx based USB video device driver"
51 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 0)
53 #define em28xx_videodbg(fmt, arg...) do {\
55 printk(KERN_INFO "%s %s :"fmt, \
56 dev->name, __func__ , ##arg); } while (0)
58 static unsigned int isoc_debug;
59 module_param(isoc_debug, int, 0644);
60 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
62 #define em28xx_isocdbg(fmt, arg...) \
65 printk(KERN_INFO "%s %s :"fmt, \
66 dev->name, __func__ , ##arg); \
70 MODULE_AUTHOR(DRIVER_AUTHOR);
71 MODULE_DESCRIPTION(DRIVER_DESC);
72 MODULE_LICENSE("GPL");
74 static LIST_HEAD(em28xx_devlist);
76 static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
77 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
78 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
79 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
81 module_param_array(card, int, NULL, 0444);
82 module_param_array(video_nr, int, NULL, 0444);
83 module_param_array(vbi_nr, int, NULL, 0444);
84 module_param_array(radio_nr, int, NULL, 0444);
85 MODULE_PARM_DESC(card, "card type");
86 MODULE_PARM_DESC(video_nr, "video device numbers");
87 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
88 MODULE_PARM_DESC(radio_nr, "radio device numbers");
90 static unsigned int video_debug;
91 module_param(video_debug, int, 0644);
92 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
94 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
95 static unsigned long em28xx_devused;
97 /* supported controls */
98 /* Common to all boards */
99 static struct v4l2_queryctrl em28xx_qctrl[] = {
101 .id = V4L2_CID_AUDIO_VOLUME,
102 .type = V4L2_CTRL_TYPE_INTEGER,
107 .default_value = 0x1f,
110 .id = V4L2_CID_AUDIO_MUTE,
111 .type = V4L2_CTRL_TYPE_BOOLEAN,
121 static struct usb_driver em28xx_usb_driver;
123 /* ------------------------------------------------------------------
124 DMA and thread functions
125 ------------------------------------------------------------------*/
128 * Announces that a buffer were filled and request the next
130 static inline void buffer_filled(struct em28xx *dev,
131 struct em28xx_dmaqueue *dma_q,
132 struct em28xx_buffer *buf)
134 /* Advice that buffer was filled */
135 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
136 buf->vb.state = VIDEOBUF_DONE;
137 buf->vb.field_count++;
138 do_gettimeofday(&buf->vb.ts);
140 dev->isoc_ctl.buf = NULL;
142 list_del(&buf->vb.queue);
143 wake_up(&buf->vb.done);
147 * Identify the buffer header type and properly handles
149 static void em28xx_copy_video(struct em28xx *dev,
150 struct em28xx_dmaqueue *dma_q,
151 struct em28xx_buffer *buf,
153 unsigned char *outp, unsigned long len)
155 void *fieldstart, *startwrite, *startread;
156 int linesdone, currlinedone, offset, lencopy, remain;
157 int bytesperline = dev->width << 1;
159 if (dma_q->pos + len > buf->vb.size)
160 len = buf->vb.size - dma_q->pos;
162 if (p[0] != 0x88 && p[0] != 0x22) {
163 em28xx_isocdbg("frame is not complete\n");
171 /* Interlaces frame */
175 fieldstart = outp + bytesperline;
177 linesdone = dma_q->pos / bytesperline;
178 currlinedone = dma_q->pos % bytesperline;
179 offset = linesdone * bytesperline * 2 + currlinedone;
180 startwrite = fieldstart + offset;
181 lencopy = bytesperline - currlinedone;
182 lencopy = lencopy > remain ? remain : lencopy;
184 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
185 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
186 ((char *)startwrite + lencopy) -
187 ((char *)outp + buf->vb.size));
188 lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite;
192 memcpy(startwrite, startread, lencopy);
197 startwrite += lencopy + bytesperline;
198 startread += lencopy;
199 if (bytesperline > remain)
202 lencopy = bytesperline;
204 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
205 em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
206 ((char *)startwrite + lencopy) -
207 ((char *)outp + buf->vb.size));
208 lencopy = remain = (char *)outp + buf->vb.size -
214 memcpy(startwrite, startread, lencopy);
222 static inline void print_err_status(struct em28xx *dev,
223 int packet, int status)
225 char *errmsg = "Unknown";
229 errmsg = "unlinked synchronuously";
232 errmsg = "unlinked asynchronuously";
235 errmsg = "Buffer error (overrun)";
238 errmsg = "Stalled (device not responding)";
241 errmsg = "Babble (bad cable?)";
244 errmsg = "Bit-stuff error (bad cable?)";
247 errmsg = "CRC/Timeout (could be anything)";
250 errmsg = "Device does not respond";
254 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
256 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
257 packet, status, errmsg);
262 * video-buf generic routine to get the next available buffer
264 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
265 struct em28xx_buffer **buf)
267 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
270 if (list_empty(&dma_q->active)) {
271 em28xx_isocdbg("No active queue to serve\n");
272 dev->isoc_ctl.buf = NULL;
277 /* Get the next buffer */
278 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
280 /* Cleans up buffer - Usefull for testing for frame/URB loss */
281 outp = videobuf_to_vmalloc(&(*buf)->vb);
282 memset(outp, 0, (*buf)->vb.size);
284 dev->isoc_ctl.buf = *buf;
290 * Controls the isoc copy of each urb packet
292 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
294 struct em28xx_buffer *buf;
295 struct em28xx_dmaqueue *dma_q = urb->context;
296 unsigned char *outp = NULL;
297 int i, len = 0, rc = 1;
303 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
306 if (urb->status < 0) {
307 print_err_status(dev, -1, urb->status);
308 if (urb->status == -ENOENT)
312 buf = dev->isoc_ctl.buf;
314 outp = videobuf_to_vmalloc(&buf->vb);
316 for (i = 0; i < urb->number_of_packets; i++) {
317 int status = urb->iso_frame_desc[i].status;
320 print_err_status(dev, i, status);
321 if (urb->iso_frame_desc[i].status != -EPROTO)
325 len = urb->iso_frame_desc[i].actual_length - 4;
327 if (urb->iso_frame_desc[i].actual_length <= 0) {
328 /* em28xx_isocdbg("packet %d is empty",i); - spammy */
331 if (urb->iso_frame_desc[i].actual_length >
333 em28xx_isocdbg("packet bigger than packet size");
337 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
339 /* FIXME: incomplete buffer checks where removed to make
340 logic simpler. Impacts of those changes should be evaluated
342 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
343 em28xx_isocdbg("VBI HEADER!!!\n");
344 /* FIXME: Should add vbi copy */
347 if (p[0] == 0x22 && p[1] == 0x5a) {
348 em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
349 len, (p[2] & 1)? "odd" : "even");
353 buffer_filled(dev, dma_q, buf);
354 get_next_buf(dma_q, &buf);
358 outp = videobuf_to_vmalloc(&buf->vb);
371 em28xx_copy_video(dev, dma_q, buf, p, outp, len);
376 /* ------------------------------------------------------------------
378 ------------------------------------------------------------------*/
381 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
383 struct em28xx_fh *fh = vq->priv_data;
384 struct em28xx *dev = fh->dev;
385 struct v4l2_frequency f;
387 *size = 16 * fh->dev->width * fh->dev->height >> 3;
389 *count = EM28XX_DEF_BUF;
391 if (*count < EM28XX_MIN_BUF)
392 *count = EM28XX_MIN_BUF;
394 dev->mode = EM28XX_ANALOG_MODE;
396 /* Ask tuner to go to analog mode */
397 memset(&f, 0, sizeof(f));
398 f.frequency = dev->ctl_freq;
400 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
405 /* This is called *without* dev->slock held; please keep it that way */
406 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
408 struct em28xx_fh *fh = vq->priv_data;
409 struct em28xx *dev = fh->dev;
410 unsigned long flags = 0;
414 /* We used to wait for the buffer to finish here, but this didn't work
415 because, as we were keeping the state as VIDEOBUF_QUEUED,
416 videobuf_queue_cancel marked it as finished for us.
417 (Also, it could wedge forever if the hardware was misconfigured.)
419 This should be safe; by the time we get here, the buffer isn't
420 queued anymore. If we ever start marking the buffers as
421 VIDEOBUF_ACTIVE, it won't be, though.
423 spin_lock_irqsave(&dev->slock, flags);
424 if (dev->isoc_ctl.buf == buf)
425 dev->isoc_ctl.buf = NULL;
426 spin_unlock_irqrestore(&dev->slock, flags);
428 videobuf_vmalloc_free(&buf->vb);
429 buf->vb.state = VIDEOBUF_NEEDS_INIT;
433 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
434 enum v4l2_field field)
436 struct em28xx_fh *fh = vq->priv_data;
437 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
438 struct em28xx *dev = fh->dev;
439 int rc = 0, urb_init = 0;
441 /* FIXME: It assumes depth = 16 */
442 /* The only currently supported format is 16 bits/pixel */
443 buf->vb.size = 16 * dev->width * dev->height >> 3;
445 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
448 buf->vb.width = dev->width;
449 buf->vb.height = dev->height;
450 buf->vb.field = field;
452 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
453 rc = videobuf_iolock(vq, &buf->vb, NULL);
458 if (!dev->isoc_ctl.num_bufs)
462 rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
463 EM28XX_NUM_BUFS, dev->max_pkt_size,
464 em28xx_isoc_copy, EM28XX_ANALOG_CAPTURE);
469 buf->vb.state = VIDEOBUF_PREPARED;
473 free_buffer(vq, buf);
478 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
480 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
481 struct em28xx_fh *fh = vq->priv_data;
482 struct em28xx *dev = fh->dev;
483 struct em28xx_dmaqueue *vidq = &dev->vidq;
485 buf->vb.state = VIDEOBUF_QUEUED;
486 list_add_tail(&buf->vb.queue, &vidq->active);
490 static void buffer_release(struct videobuf_queue *vq,
491 struct videobuf_buffer *vb)
493 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
494 struct em28xx_fh *fh = vq->priv_data;
495 struct em28xx *dev = (struct em28xx *)fh->dev;
497 em28xx_isocdbg("em28xx: called buffer_release\n");
499 free_buffer(vq, buf);
502 static struct videobuf_queue_ops em28xx_video_qops = {
503 .buf_setup = buffer_setup,
504 .buf_prepare = buffer_prepare,
505 .buf_queue = buffer_queue,
506 .buf_release = buffer_release,
509 /********************* v4l2 interface **************************************/
513 * inits registers with sane defaults
515 static int em28xx_config(struct em28xx *dev)
518 /* Sets I2C speed to 100 KHz */
520 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
522 /* enable vbi capturing */
524 /* em28xx_write_regs_req(dev, 0x00, 0x0e, "\xC0", 1); audio register */
525 /* em28xx_write_regs_req(dev, 0x00, 0x0f, "\x80", 1); clk register */
526 em28xx_write_regs_req(dev, 0x00, 0x11, "\x51", 1);
528 dev->mute = 1; /* maybe not the right place... */
531 em28xx_outfmt_set_yuv422(dev);
532 em28xx_colorlevels_set_default(dev);
533 em28xx_compression_disable(dev);
539 * em28xx_config_i2c()
540 * configure i2c attached devices
542 static void em28xx_config_i2c(struct em28xx *dev)
544 struct v4l2_routing route;
546 route.input = INPUT(dev->ctl_input)->vmux;
548 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
549 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
550 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
553 static void video_mux(struct em28xx *dev, int index)
555 struct v4l2_routing route;
557 route.input = INPUT(index)->vmux;
559 dev->ctl_input = index;
560 dev->ctl_ainput = INPUT(index)->amux;
562 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
564 if (dev->has_msp34xx) {
565 if (dev->i2s_speed) {
566 em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ,
569 route.input = dev->ctl_ainput;
570 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
571 /* Note: this is msp3400 specific */
572 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING,
576 em28xx_audio_analog_set(dev);
579 /* Usage lock check functions */
580 static int res_get(struct em28xx_fh *fh)
582 struct em28xx *dev = fh->dev;
585 /* This instance already has stream_on */
592 mutex_lock(&dev->lock);
595 mutex_unlock(&dev->lock);
599 static int res_check(struct em28xx_fh *fh)
601 return (fh->stream_on);
604 static void res_free(struct em28xx_fh *fh)
606 struct em28xx *dev = fh->dev;
608 mutex_lock(&dev->lock);
611 mutex_unlock(&dev->lock);
616 * return the current saturation, brightness or contrast, mute state
618 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
621 case V4L2_CID_AUDIO_MUTE:
622 ctrl->value = dev->mute;
624 case V4L2_CID_AUDIO_VOLUME:
625 ctrl->value = dev->volume;
634 * mute or set new saturation, brightness or contrast
636 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
639 case V4L2_CID_AUDIO_MUTE:
640 if (ctrl->value != dev->mute) {
641 dev->mute = ctrl->value;
642 return em28xx_audio_analog_set(dev);
645 case V4L2_CID_AUDIO_VOLUME:
646 dev->volume = ctrl->value;
647 return em28xx_audio_analog_set(dev);
653 static int check_dev(struct em28xx *dev)
655 if (dev->state & DEV_DISCONNECTED) {
656 em28xx_errdev("v4l2 ioctl: device not present\n");
660 if (dev->state & DEV_MISCONFIGURED) {
661 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
662 "close and open it again\n");
668 static void get_scale(struct em28xx *dev,
669 unsigned int width, unsigned int height,
670 unsigned int *hscale, unsigned int *vscale)
672 unsigned int maxw = norm_maxw(dev);
673 unsigned int maxh = norm_maxh(dev);
675 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
676 if (*hscale >= 0x4000)
679 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
680 if (*vscale >= 0x4000)
684 /* ------------------------------------------------------------------
685 IOCTL vidioc handling
686 ------------------------------------------------------------------*/
688 static int vidioc_g_fmt_cap(struct file *file, void *priv,
689 struct v4l2_format *f)
691 struct em28xx_fh *fh = priv;
692 struct em28xx *dev = fh->dev;
694 mutex_lock(&dev->lock);
696 f->fmt.pix.width = dev->width;
697 f->fmt.pix.height = dev->height;
698 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
699 f->fmt.pix.bytesperline = dev->width * 2;
700 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height;
701 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
703 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
704 f->fmt.pix.field = dev->interlaced ?
705 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
707 mutex_unlock(&dev->lock);
711 static int vidioc_try_fmt_cap(struct file *file, void *priv,
712 struct v4l2_format *f)
714 struct em28xx_fh *fh = priv;
715 struct em28xx *dev = fh->dev;
716 int width = f->fmt.pix.width;
717 int height = f->fmt.pix.height;
718 unsigned int maxw = norm_maxw(dev);
719 unsigned int maxh = norm_maxh(dev);
720 unsigned int hscale, vscale;
722 /* width must even because of the YUYV format
723 height must be even because of interlacing */
736 mutex_lock(&dev->lock);
738 if (dev->is_em2800) {
739 /* the em2800 can only scale down to 50% */
740 if (height % (maxh / 2))
742 if (width % (maxw / 2))
744 /* according to empiatech support */
745 /* the MaxPacketSize is to small to support */
746 /* framesizes larger than 640x480 @ 30 fps */
747 /* or 640x576 @ 25 fps. As this would cut */
748 /* of a part of the image we prefer */
749 /* 360x576 or 360x480 for now */
750 if (width == maxw && height == maxh)
754 get_scale(dev, width, height, &hscale, &vscale);
756 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
757 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
759 f->fmt.pix.width = width;
760 f->fmt.pix.height = height;
761 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
762 f->fmt.pix.bytesperline = width * 2;
763 f->fmt.pix.sizeimage = width * 2 * height;
764 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
765 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
767 mutex_unlock(&dev->lock);
771 static int vidioc_s_fmt_cap(struct file *file, void *priv,
772 struct v4l2_format *f)
774 struct em28xx_fh *fh = priv;
775 struct em28xx *dev = fh->dev;
782 vidioc_try_fmt_cap(file, priv, f);
784 mutex_lock(&dev->lock);
786 if (videobuf_queue_is_busy(&fh->vb_vidq)) {
787 em28xx_errdev("%s queue busy\n", __func__);
792 if (dev->stream_on && !fh->stream_on) {
793 em28xx_errdev("%s device in use by another fh\n", __func__);
798 /* set new image size */
799 dev->width = f->fmt.pix.width;
800 dev->height = f->fmt.pix.height;
801 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
803 em28xx_set_alternate(dev);
804 em28xx_resolution_set(dev);
809 mutex_unlock(&dev->lock);
813 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm)
815 struct em28xx_fh *fh = priv;
816 struct em28xx *dev = fh->dev;
817 struct v4l2_format f;
824 mutex_lock(&dev->lock);
826 mutex_unlock(&dev->lock);
828 /* Adjusts width/height, if needed */
829 f.fmt.pix.width = dev->width;
830 f.fmt.pix.height = dev->height;
831 vidioc_try_fmt_cap(file, priv, &f);
833 mutex_lock(&dev->lock);
835 /* set new image size */
836 dev->width = f.fmt.pix.width;
837 dev->height = f.fmt.pix.height;
838 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
840 em28xx_resolution_set(dev);
841 em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
843 mutex_unlock(&dev->lock);
847 static const char *iname[] = {
848 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
849 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
850 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
851 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
852 [EM28XX_VMUX_SVIDEO] = "S-Video",
853 [EM28XX_VMUX_TELEVISION] = "Television",
854 [EM28XX_VMUX_CABLE] = "Cable TV",
855 [EM28XX_VMUX_DVB] = "DVB",
856 [EM28XX_VMUX_DEBUG] = "for debug only",
859 static int vidioc_enum_input(struct file *file, void *priv,
860 struct v4l2_input *i)
862 struct em28xx_fh *fh = priv;
863 struct em28xx *dev = fh->dev;
867 if (n >= MAX_EM28XX_INPUT)
869 if (0 == INPUT(n)->type)
873 i->type = V4L2_INPUT_TYPE_CAMERA;
875 strcpy(i->name, iname[INPUT(n)->type]);
877 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
878 (EM28XX_VMUX_CABLE == INPUT(n)->type))
879 i->type = V4L2_INPUT_TYPE_TUNER;
881 i->std = dev->vdev->tvnorms;
886 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
888 struct em28xx_fh *fh = priv;
889 struct em28xx *dev = fh->dev;
896 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
898 struct em28xx_fh *fh = priv;
899 struct em28xx *dev = fh->dev;
906 if (i >= MAX_EM28XX_INPUT)
908 if (0 == INPUT(i)->type)
911 mutex_lock(&dev->lock);
915 mutex_unlock(&dev->lock);
919 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
921 struct em28xx_fh *fh = priv;
922 struct em28xx *dev = fh->dev;
923 unsigned int index = a->index;
928 index = dev->ctl_ainput;
931 strcpy(a->name, "Television");
933 strcpy(a->name, "Line In");
935 a->capability = V4L2_AUDCAP_STEREO;
941 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
943 struct em28xx_fh *fh = priv;
944 struct em28xx *dev = fh->dev;
946 if (a->index != dev->ctl_ainput)
952 static int vidioc_queryctrl(struct file *file, void *priv,
953 struct v4l2_queryctrl *qc)
955 struct em28xx_fh *fh = priv;
956 struct em28xx *dev = fh->dev;
965 memset(qc, 0, sizeof(*qc));
969 if (!dev->has_msp34xx) {
970 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
971 if (qc->id && qc->id == em28xx_qctrl[i].id) {
972 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
977 mutex_lock(&dev->lock);
978 em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
979 mutex_unlock(&dev->lock);
987 static int vidioc_g_ctrl(struct file *file, void *priv,
988 struct v4l2_control *ctrl)
990 struct em28xx_fh *fh = priv;
991 struct em28xx *dev = fh->dev;
997 mutex_lock(&dev->lock);
999 if (!dev->has_msp34xx)
1000 rc = em28xx_get_ctrl(dev, ctrl);
1004 if (rc == -EINVAL) {
1005 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1009 mutex_unlock(&dev->lock);
1013 static int vidioc_s_ctrl(struct file *file, void *priv,
1014 struct v4l2_control *ctrl)
1016 struct em28xx_fh *fh = priv;
1017 struct em28xx *dev = fh->dev;
1021 rc = check_dev(dev);
1025 mutex_lock(&dev->lock);
1027 if (dev->has_msp34xx)
1028 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1031 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1032 if (ctrl->id == em28xx_qctrl[i].id) {
1033 if (ctrl->value < em28xx_qctrl[i].minimum ||
1034 ctrl->value > em28xx_qctrl[i].maximum) {
1039 rc = em28xx_set_ctrl(dev, ctrl);
1045 /* Control not found - try to send it to the attached devices */
1047 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1051 mutex_unlock(&dev->lock);
1055 static int vidioc_g_tuner(struct file *file, void *priv,
1056 struct v4l2_tuner *t)
1058 struct em28xx_fh *fh = priv;
1059 struct em28xx *dev = fh->dev;
1062 rc = check_dev(dev);
1069 strcpy(t->name, "Tuner");
1071 mutex_lock(&dev->lock);
1073 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1075 mutex_unlock(&dev->lock);
1079 static int vidioc_s_tuner(struct file *file, void *priv,
1080 struct v4l2_tuner *t)
1082 struct em28xx_fh *fh = priv;
1083 struct em28xx *dev = fh->dev;
1086 rc = check_dev(dev);
1093 mutex_lock(&dev->lock);
1095 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1097 mutex_unlock(&dev->lock);
1101 static int vidioc_g_frequency(struct file *file, void *priv,
1102 struct v4l2_frequency *f)
1104 struct em28xx_fh *fh = priv;
1105 struct em28xx *dev = fh->dev;
1107 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1108 f->frequency = dev->ctl_freq;
1113 static int vidioc_s_frequency(struct file *file, void *priv,
1114 struct v4l2_frequency *f)
1116 struct em28xx_fh *fh = priv;
1117 struct em28xx *dev = fh->dev;
1120 rc = check_dev(dev);
1127 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1129 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1132 mutex_lock(&dev->lock);
1134 dev->ctl_freq = f->frequency;
1135 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1137 mutex_unlock(&dev->lock);
1141 #ifdef CONFIG_VIDEO_ADV_DEBUG
1142 static int em28xx_reg_len(int reg)
1154 static int vidioc_g_register(struct file *file, void *priv,
1155 struct v4l2_register *reg)
1157 struct em28xx_fh *fh = priv;
1158 struct em28xx *dev = fh->dev;
1161 if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1164 if (em28xx_reg_len(reg->reg) == 1) {
1165 ret = em28xx_read_reg(dev, reg->reg);
1172 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1173 reg->reg, (char *)&val, 2);
1177 reg->val = cpu_to_le64((__u64)val);
1183 static int vidioc_s_register(struct file *file, void *priv,
1184 struct v4l2_register *reg)
1186 struct em28xx_fh *fh = priv;
1187 struct em28xx *dev = fh->dev;
1190 buf = le64_to_cpu((__u64)reg->val);
1192 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1193 em28xx_reg_len(reg->reg));
1198 static int vidioc_cropcap(struct file *file, void *priv,
1199 struct v4l2_cropcap *cc)
1201 struct em28xx_fh *fh = priv;
1202 struct em28xx *dev = fh->dev;
1204 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1207 cc->bounds.left = 0;
1209 cc->bounds.width = dev->width;
1210 cc->bounds.height = dev->height;
1211 cc->defrect = cc->bounds;
1212 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1213 cc->pixelaspect.denominator = 59;
1218 static int vidioc_streamon(struct file *file, void *priv,
1219 enum v4l2_buf_type type)
1221 struct em28xx_fh *fh = priv;
1222 struct em28xx *dev = fh->dev;
1225 rc = check_dev(dev);
1230 if (unlikely(res_get(fh) < 0))
1233 return (videobuf_streamon(&fh->vb_vidq));
1236 static int vidioc_streamoff(struct file *file, void *priv,
1237 enum v4l2_buf_type type)
1239 struct em28xx_fh *fh = priv;
1240 struct em28xx *dev = fh->dev;
1243 rc = check_dev(dev);
1247 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1249 if (type != fh->type)
1252 videobuf_streamoff(&fh->vb_vidq);
1258 static int vidioc_querycap(struct file *file, void *priv,
1259 struct v4l2_capability *cap)
1261 struct em28xx_fh *fh = priv;
1262 struct em28xx *dev = fh->dev;
1264 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1265 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1266 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1268 cap->version = EM28XX_VERSION_CODE;
1271 V4L2_CAP_SLICED_VBI_CAPTURE |
1272 V4L2_CAP_VIDEO_CAPTURE |
1274 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1276 if (dev->tuner_type != TUNER_ABSENT)
1277 cap->capabilities |= V4L2_CAP_TUNER;
1282 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
1283 struct v4l2_fmtdesc *fmtd)
1285 if (fmtd->index != 0)
1288 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1289 strcpy(fmtd->description, "Packed YUY2");
1290 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1291 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1296 /* Sliced VBI ioctls */
1297 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
1298 struct v4l2_format *f)
1300 struct em28xx_fh *fh = priv;
1301 struct em28xx *dev = fh->dev;
1304 rc = check_dev(dev);
1308 mutex_lock(&dev->lock);
1310 f->fmt.sliced.service_set = 0;
1312 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1314 if (f->fmt.sliced.service_set == 0)
1317 mutex_unlock(&dev->lock);
1321 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
1322 struct v4l2_format *f)
1324 struct em28xx_fh *fh = priv;
1325 struct em28xx *dev = fh->dev;
1328 rc = check_dev(dev);
1332 mutex_lock(&dev->lock);
1333 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1334 mutex_unlock(&dev->lock);
1336 if (f->fmt.sliced.service_set == 0)
1343 static int vidioc_reqbufs(struct file *file, void *priv,
1344 struct v4l2_requestbuffers *rb)
1346 struct em28xx_fh *fh = priv;
1347 struct em28xx *dev = fh->dev;
1350 rc = check_dev(dev);
1354 return (videobuf_reqbufs(&fh->vb_vidq, rb));
1357 static int vidioc_querybuf(struct file *file, void *priv,
1358 struct v4l2_buffer *b)
1360 struct em28xx_fh *fh = priv;
1361 struct em28xx *dev = fh->dev;
1364 rc = check_dev(dev);
1368 return (videobuf_querybuf(&fh->vb_vidq, b));
1371 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1373 struct em28xx_fh *fh = priv;
1374 struct em28xx *dev = fh->dev;
1377 rc = check_dev(dev);
1381 return (videobuf_qbuf(&fh->vb_vidq, b));
1384 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1386 struct em28xx_fh *fh = priv;
1387 struct em28xx *dev = fh->dev;
1390 rc = check_dev(dev);
1394 return (videobuf_dqbuf(&fh->vb_vidq, b,
1395 file->f_flags & O_NONBLOCK));
1398 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1399 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1401 struct em28xx_fh *fh = priv;
1403 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1408 /* ----------------------------------------------------------- */
1409 /* RADIO ESPECIFIC IOCTLS */
1410 /* ----------------------------------------------------------- */
1412 static int radio_querycap(struct file *file, void *priv,
1413 struct v4l2_capability *cap)
1415 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1417 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1418 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1419 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1421 cap->version = EM28XX_VERSION_CODE;
1422 cap->capabilities = V4L2_CAP_TUNER;
1426 static int radio_g_tuner(struct file *file, void *priv,
1427 struct v4l2_tuner *t)
1429 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1431 if (unlikely(t->index > 0))
1434 strcpy(t->name, "Radio");
1435 t->type = V4L2_TUNER_RADIO;
1437 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1441 static int radio_enum_input(struct file *file, void *priv,
1442 struct v4l2_input *i)
1446 strcpy(i->name, "Radio");
1447 i->type = V4L2_INPUT_TYPE_TUNER;
1452 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1454 if (unlikely(a->index))
1457 strcpy(a->name, "Radio");
1461 static int radio_s_tuner(struct file *file, void *priv,
1462 struct v4l2_tuner *t)
1464 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1469 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1474 static int radio_s_audio(struct file *file, void *fh,
1475 struct v4l2_audio *a)
1480 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1485 static int radio_queryctrl(struct file *file, void *priv,
1486 struct v4l2_queryctrl *qc)
1490 if (qc->id < V4L2_CID_BASE ||
1491 qc->id >= V4L2_CID_LASTP1)
1494 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1495 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1496 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1505 * em28xx_v4l2_open()
1506 * inits the device and starts isoc transfer
1508 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1510 int minor = iminor(inode);
1511 int errCode = 0, radio = 0;
1512 struct em28xx *h, *dev = NULL;
1513 struct em28xx_fh *fh;
1514 enum v4l2_buf_type fh_type = 0;
1516 list_for_each_entry(h, &em28xx_devlist, devlist) {
1517 if (h->vdev->minor == minor) {
1519 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1521 if (h->vbi_dev->minor == minor) {
1523 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1526 h->radio_dev->minor == minor) {
1534 em28xx_videodbg("open minor=%d type=%s users=%d\n",
1535 minor, v4l2_type_names[fh_type], dev->users);
1537 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1540 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1543 mutex_lock(&dev->lock);
1547 filp->private_data = fh;
1549 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1550 dev->width = norm_maxw(dev);
1551 dev->height = norm_maxh(dev);
1555 em28xx_set_alternate(dev);
1556 em28xx_resolution_set(dev);
1560 em28xx_videodbg("video_open: setting radio device\n");
1561 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1566 videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1567 NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1568 sizeof(struct em28xx_buffer), fh);
1570 mutex_unlock(&dev->lock);
1575 * em28xx_realease_resources()
1576 * unregisters the v4l2,i2c and usb devices
1577 * called when the device gets disconected or at module unload
1579 static void em28xx_release_resources(struct em28xx *dev)
1582 /*FIXME: I2C IR should be disconnected */
1584 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1585 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1586 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1587 list_del(&dev->devlist);
1588 if (dev->radio_dev) {
1589 if (-1 != dev->radio_dev->minor)
1590 video_unregister_device(dev->radio_dev);
1592 video_device_release(dev->radio_dev);
1593 dev->radio_dev = NULL;
1596 if (-1 != dev->vbi_dev->minor)
1597 video_unregister_device(dev->vbi_dev);
1599 video_device_release(dev->vbi_dev);
1600 dev->vbi_dev = NULL;
1603 if (-1 != dev->vdev->minor)
1604 video_unregister_device(dev->vdev);
1606 video_device_release(dev->vdev);
1609 em28xx_i2c_unregister(dev);
1610 usb_put_dev(dev->udev);
1612 /* Mark device as unused */
1613 em28xx_devused &= ~(1<<dev->devno);
1617 * em28xx_v4l2_close()
1618 * stops streaming and deallocates all resources allocated by the v4l2
1621 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1623 struct em28xx_fh *fh = filp->private_data;
1624 struct em28xx *dev = fh->dev;
1627 em28xx_videodbg("users=%d\n", dev->users);
1633 mutex_lock(&dev->lock);
1635 if (dev->users == 1) {
1636 videobuf_stop(&fh->vb_vidq);
1637 videobuf_mmap_free(&fh->vb_vidq);
1639 /* the device is already disconnect,
1640 free the remaining resources */
1641 if (dev->state & DEV_DISCONNECTED) {
1642 em28xx_release_resources(dev);
1643 mutex_unlock(&dev->lock);
1648 /* do this before setting alternate! */
1649 em28xx_uninit_isoc(dev);
1651 /* set alternate 0 */
1653 em28xx_videodbg("setting alternate 0\n");
1654 errCode = usb_set_interface(dev->udev, 0, 0);
1656 em28xx_errdev("cannot change alternate number to "
1657 "0 (error=%i)\n", errCode);
1662 wake_up_interruptible_nr(&dev->open, 1);
1663 mutex_unlock(&dev->lock);
1668 * em28xx_v4l2_read()
1669 * will allocate buffers when called for the first time
1672 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
1675 struct em28xx_fh *fh = filp->private_data;
1676 struct em28xx *dev = fh->dev;
1679 rc = check_dev(dev);
1683 /* FIXME: read() is not prepared to allow changing the video
1684 resolution while streaming. Seems a bug at em28xx_set_fmt
1687 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1688 if (unlikely(res_get(fh)))
1691 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1692 filp->f_flags & O_NONBLOCK);
1698 * em28xx_v4l2_poll()
1699 * will allocate buffers when called for the first time
1701 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1703 struct em28xx_fh *fh = filp->private_data;
1704 struct em28xx *dev = fh->dev;
1707 rc = check_dev(dev);
1711 if (unlikely(res_get(fh) < 0))
1714 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1717 return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1721 * em28xx_v4l2_mmap()
1723 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1725 struct em28xx_fh *fh = filp->private_data;
1726 struct em28xx *dev = fh->dev;
1729 if (unlikely(res_get(fh) < 0))
1732 rc = check_dev(dev);
1736 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1738 em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1739 (unsigned long)vma->vm_start,
1740 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1746 static const struct file_operations em28xx_v4l_fops = {
1747 .owner = THIS_MODULE,
1748 .open = em28xx_v4l2_open,
1749 .release = em28xx_v4l2_close,
1750 .read = em28xx_v4l2_read,
1751 .poll = em28xx_v4l2_poll,
1752 .mmap = em28xx_v4l2_mmap,
1753 .ioctl = video_ioctl2,
1754 .llseek = no_llseek,
1755 .compat_ioctl = v4l_compat_ioctl32,
1758 static const struct file_operations radio_fops = {
1759 .owner = THIS_MODULE,
1760 .open = em28xx_v4l2_open,
1761 .release = em28xx_v4l2_close,
1762 .ioctl = video_ioctl2,
1763 .compat_ioctl = v4l_compat_ioctl32,
1764 .llseek = no_llseek,
1767 static const struct video_device em28xx_video_template = {
1768 .fops = &em28xx_v4l_fops,
1769 .release = video_device_release,
1772 .vidioc_querycap = vidioc_querycap,
1773 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1774 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1775 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1776 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1777 .vidioc_g_audio = vidioc_g_audio,
1778 .vidioc_s_audio = vidioc_s_audio,
1779 .vidioc_cropcap = vidioc_cropcap,
1781 .vidioc_g_fmt_vbi_capture = vidioc_g_fmt_vbi_capture,
1782 .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1783 .vidioc_s_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1785 .vidioc_reqbufs = vidioc_reqbufs,
1786 .vidioc_querybuf = vidioc_querybuf,
1787 .vidioc_qbuf = vidioc_qbuf,
1788 .vidioc_dqbuf = vidioc_dqbuf,
1789 .vidioc_s_std = vidioc_s_std,
1790 .vidioc_enum_input = vidioc_enum_input,
1791 .vidioc_g_input = vidioc_g_input,
1792 .vidioc_s_input = vidioc_s_input,
1793 .vidioc_queryctrl = vidioc_queryctrl,
1794 .vidioc_g_ctrl = vidioc_g_ctrl,
1795 .vidioc_s_ctrl = vidioc_s_ctrl,
1796 .vidioc_streamon = vidioc_streamon,
1797 .vidioc_streamoff = vidioc_streamoff,
1798 .vidioc_g_tuner = vidioc_g_tuner,
1799 .vidioc_s_tuner = vidioc_s_tuner,
1800 .vidioc_g_frequency = vidioc_g_frequency,
1801 .vidioc_s_frequency = vidioc_s_frequency,
1802 #ifdef CONFIG_VIDEO_ADV_DEBUG
1803 .vidioc_g_register = vidioc_g_register,
1804 .vidioc_s_register = vidioc_s_register,
1806 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1807 .vidiocgmbuf = vidiocgmbuf,
1810 .tvnorms = V4L2_STD_ALL,
1811 .current_norm = V4L2_STD_PAL,
1814 static struct video_device em28xx_radio_template = {
1815 .name = "em28xx-radio",
1816 .type = VID_TYPE_TUNER,
1817 .fops = &radio_fops,
1819 .vidioc_querycap = radio_querycap,
1820 .vidioc_g_tuner = radio_g_tuner,
1821 .vidioc_enum_input = radio_enum_input,
1822 .vidioc_g_audio = radio_g_audio,
1823 .vidioc_s_tuner = radio_s_tuner,
1824 .vidioc_s_audio = radio_s_audio,
1825 .vidioc_s_input = radio_s_input,
1826 .vidioc_queryctrl = radio_queryctrl,
1827 .vidioc_g_ctrl = vidioc_g_ctrl,
1828 .vidioc_s_ctrl = vidioc_s_ctrl,
1829 .vidioc_g_frequency = vidioc_g_frequency,
1830 .vidioc_s_frequency = vidioc_s_frequency,
1831 #ifdef CONFIG_VIDEO_ADV_DEBUG
1832 .vidioc_g_register = vidioc_g_register,
1833 .vidioc_s_register = vidioc_s_register,
1837 /******************************** usb interface ******************************/
1840 static LIST_HEAD(em28xx_extension_devlist);
1841 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1843 int em28xx_register_extension(struct em28xx_ops *ops)
1845 struct em28xx *h, *dev = NULL;
1847 list_for_each_entry(h, &em28xx_devlist, devlist)
1850 mutex_lock(&em28xx_extension_devlist_lock);
1851 list_add_tail(&ops->next, &em28xx_extension_devlist);
1855 printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1856 mutex_unlock(&em28xx_extension_devlist_lock);
1860 EXPORT_SYMBOL(em28xx_register_extension);
1862 void em28xx_unregister_extension(struct em28xx_ops *ops)
1864 struct em28xx *h, *dev = NULL;
1866 list_for_each_entry(h, &em28xx_devlist, devlist)
1872 mutex_lock(&em28xx_extension_devlist_lock);
1873 printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1874 list_del(&ops->next);
1875 mutex_unlock(&em28xx_extension_devlist_lock);
1877 EXPORT_SYMBOL(em28xx_unregister_extension);
1879 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1880 const struct video_device *template,
1882 const char *type_name)
1884 struct video_device *vfd;
1886 vfd = video_device_alloc();
1891 vfd->dev = &dev->udev->dev;
1892 vfd->release = video_device_release;
1894 vfd->debug = video_debug;
1896 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1897 dev->name, type_name);
1905 * allocates and inits the device structs, registers i2c bus and v4l device
1907 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1910 struct em28xx_ops *ops = NULL;
1911 struct em28xx *dev = *devhandle;
1912 int retval = -ENOMEM;
1914 unsigned int maxh, maxw;
1917 mutex_init(&dev->lock);
1918 spin_lock_init(&dev->slock);
1919 init_waitqueue_head(&dev->open);
1920 init_waitqueue_head(&dev->wait_frame);
1921 init_waitqueue_head(&dev->wait_stream);
1923 dev->em28xx_write_regs = em28xx_write_regs;
1924 dev->em28xx_read_reg = em28xx_read_reg;
1925 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1926 dev->em28xx_write_regs_req = em28xx_write_regs_req;
1927 dev->em28xx_read_reg_req = em28xx_read_reg_req;
1928 dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
1930 errCode = em28xx_read_reg(dev, CHIPID_REG);
1932 em28xx_info("em28xx chip ID = %d\n", errCode);
1934 em28xx_pre_card_setup(dev);
1936 errCode = em28xx_config(dev);
1938 em28xx_errdev("error configuring device\n");
1939 em28xx_devused &= ~(1<<dev->devno);
1944 /* register i2c bus */
1945 em28xx_i2c_register(dev);
1947 /* Do board specific init and eeprom reading */
1948 em28xx_card_setup(dev);
1950 /* Configure audio */
1951 em28xx_audio_analog_set(dev);
1953 /* configure the device */
1954 em28xx_config_i2c(dev);
1956 /* set default norm */
1957 dev->norm = em28xx_video_template.current_norm;
1959 maxw = norm_maxw(dev);
1960 maxh = norm_maxh(dev);
1962 /* set default image size */
1965 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1970 errCode = em28xx_config(dev);
1972 list_add_tail(&dev->devlist, &em28xx_devlist);
1974 /* allocate and fill video video_device struct */
1975 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
1976 VID_TYPE_CAPTURE, "video");
1977 if (NULL == dev->vdev) {
1978 em28xx_errdev("cannot allocate video_device.\n");
1981 if (dev->tuner_type != TUNER_ABSENT)
1982 dev->vdev->type |= VID_TYPE_TUNER;
1984 /* register v4l2 video video_device */
1985 retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1986 video_nr[dev->devno]);
1988 em28xx_errdev("unable to register video device (error=%i).\n",
1993 /* Allocate and fill vbi video_device struct */
1994 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
1995 VFL_TYPE_VBI, "vbi");
1996 /* register v4l2 vbi video_device */
1997 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1998 vbi_nr[dev->devno]) < 0) {
1999 em28xx_errdev("unable to register vbi device\n");
2004 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2005 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2006 VFL_TYPE_RADIO, "radio");
2007 if (NULL == dev->radio_dev) {
2008 em28xx_errdev("cannot allocate video_device.\n");
2011 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2012 radio_nr[dev->devno]);
2014 em28xx_errdev("can't register radio device\n");
2017 em28xx_info("Registered radio device as /dev/radio%d\n",
2018 dev->radio_dev->minor & 0x1f);
2021 /* init video dma queues */
2022 INIT_LIST_HEAD(&dev->vidq.active);
2023 INIT_LIST_HEAD(&dev->vidq.queued);
2026 if (dev->has_msp34xx) {
2027 /* Send a reset to other chips via gpio */
2028 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2030 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2036 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2037 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
2038 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
2040 mutex_lock(&em28xx_extension_devlist_lock);
2041 if (!list_empty(&em28xx_extension_devlist)) {
2042 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2047 mutex_unlock(&em28xx_extension_devlist_lock);
2052 em28xx_release_resources(dev);
2053 mutex_unlock(&dev->lock);
2058 #if defined(CONFIG_MODULES) && defined(MODULE)
2059 static void request_module_async(struct work_struct *work)
2061 struct em28xx *dev = container_of(work,
2062 struct em28xx, request_module_wk);
2064 if (dev->has_audio_class)
2065 request_module("snd-usb-audio");
2067 request_module("em28xx-alsa");
2070 request_module("em28xx-dvb");
2073 static void request_modules(struct em28xx *dev)
2075 INIT_WORK(&dev->request_module_wk, request_module_async);
2076 schedule_work(&dev->request_module_wk);
2079 #define request_modules(dev)
2080 #endif /* CONFIG_MODULES */
2083 * em28xx_usb_probe()
2084 * checks for supported devices
2086 static int em28xx_usb_probe(struct usb_interface *interface,
2087 const struct usb_device_id *id)
2089 const struct usb_endpoint_descriptor *endpoint;
2090 struct usb_device *udev;
2091 struct usb_interface *uif;
2092 struct em28xx *dev = NULL;
2093 int retval = -ENODEV;
2096 udev = usb_get_dev(interface_to_usbdev(interface));
2097 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2099 /* Check to see next free device and mark as used */
2100 nr = find_first_zero_bit(&em28xx_devused, EM28XX_MAXBOARDS);
2101 em28xx_devused |= 1<<nr;
2103 /* Don't register audio interfaces */
2104 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2105 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2106 udev->descriptor.idVendor,
2107 udev->descriptor.idProduct,
2109 interface->altsetting[0].desc.bInterfaceClass);
2111 em28xx_devused &= ~(1<<nr);
2115 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2116 udev->descriptor.idVendor,
2117 udev->descriptor.idProduct,
2119 interface->altsetting[0].desc.bInterfaceClass);
2121 endpoint = &interface->cur_altsetting->endpoint[1].desc;
2123 /* check if the device has the iso in endpoint at the correct place */
2124 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2125 USB_ENDPOINT_XFER_ISOC) {
2126 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2127 em28xx_devused &= ~(1<<nr);
2130 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2131 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2132 em28xx_devused &= ~(1<<nr);
2136 if (nr >= EM28XX_MAXBOARDS) {
2137 printk(DRIVER_NAME ": Supports only %i em28xx boards.\n",
2139 em28xx_devused &= ~(1<<nr);
2143 /* allocate memory for our device state and initialize it */
2144 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2146 em28xx_err(DRIVER_NAME ": out of memory!\n");
2147 em28xx_devused &= ~(1<<nr);
2151 snprintf(dev->name, 29, "em28xx #%d", nr);
2153 dev->model = id->driver_info;
2156 /* Checks if audio is provided by some interface */
2157 for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2158 uif = udev->config->interface[i];
2159 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2160 dev->has_audio_class = 1;
2165 printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2166 dev->has_audio_class ? "Has" : "Doesn't have");
2168 /* compute alternate max packet sizes */
2169 uif = udev->actconfig->interface[0];
2171 dev->num_alt = uif->num_altsetting;
2172 em28xx_info("Alternate settings: %i\n", dev->num_alt);
2173 /* dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* */
2174 dev->alt_max_pkt_size = kmalloc(32 * dev->num_alt, GFP_KERNEL);
2176 if (dev->alt_max_pkt_size == NULL) {
2177 em28xx_errdev("out of memory!\n");
2178 em28xx_devused &= ~(1<<nr);
2183 for (i = 0; i < dev->num_alt ; i++) {
2184 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2186 dev->alt_max_pkt_size[i] =
2187 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2188 em28xx_info("Alternate setting %i, max size= %i\n", i,
2189 dev->alt_max_pkt_size[i]);
2192 if ((card[nr] >= 0) && (card[nr] < em28xx_bcount))
2193 dev->model = card[nr];
2195 /* allocate device struct */
2196 retval = em28xx_init_dev(&dev, udev, nr);
2200 em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2202 /* save our data pointer in this interface device */
2203 usb_set_intfdata(interface, dev);
2205 request_modules(dev);
2211 * em28xx_usb_disconnect()
2212 * called when the device gets diconencted
2213 * video device will be unregistered on v4l2_close in case it is still open
2215 static void em28xx_usb_disconnect(struct usb_interface *interface)
2218 struct em28xx_ops *ops = NULL;
2220 dev = usb_get_intfdata(interface);
2221 usb_set_intfdata(interface, NULL);
2226 em28xx_info("disconnecting %s\n", dev->vdev->name);
2228 /* wait until all current v4l2 io is finished then deallocate
2230 mutex_lock(&dev->lock);
2232 wake_up_interruptible_all(&dev->open);
2236 ("device /dev/video%d is open! Deregistration and memory "
2237 "deallocation are deferred on close.\n",
2238 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2240 dev->state |= DEV_MISCONFIGURED;
2241 em28xx_uninit_isoc(dev);
2242 dev->state |= DEV_DISCONNECTED;
2243 wake_up_interruptible(&dev->wait_frame);
2244 wake_up_interruptible(&dev->wait_stream);
2246 dev->state |= DEV_DISCONNECTED;
2247 em28xx_release_resources(dev);
2249 mutex_unlock(&dev->lock);
2251 mutex_lock(&em28xx_extension_devlist_lock);
2252 if (!list_empty(&em28xx_extension_devlist)) {
2253 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2257 mutex_unlock(&em28xx_extension_devlist_lock);
2260 kfree(dev->alt_max_pkt_size);
2265 static struct usb_driver em28xx_usb_driver = {
2267 .probe = em28xx_usb_probe,
2268 .disconnect = em28xx_usb_disconnect,
2269 .id_table = em28xx_id_table,
2272 static int __init em28xx_module_init(void)
2276 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2277 (EM28XX_VERSION_CODE >> 16) & 0xff,
2278 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2280 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2281 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2284 /* register this driver with the USB subsystem */
2285 result = usb_register(&em28xx_usb_driver);
2287 em28xx_err(DRIVER_NAME
2288 " usb_register failed. Error number %d.\n", result);
2293 static void __exit em28xx_module_exit(void)
2295 /* deregister this driver with the USB subsystem */
2296 usb_deregister(&em28xx_usb_driver);
2299 module_init(em28xx_module_init);
2300 module_exit(em28xx_module_exit);