2 em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
4 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
5 Markus Rechberger <mrechberger@gmail.com>
6 Mauro Carvalho Chehab <mchehab@infradead.org>
7 Sascha Sommer <saschasommer@freenet.de>
9 Some parts based on SN9C10x PC Camera Controllers GPL driver made
10 by Luca Risolia <luca.risolia@studio.unibo.it>
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include <linux/init.h>
28 #include <linux/list.h>
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/bitmap.h>
32 #include <linux/usb.h>
33 #include <linux/i2c.h>
34 #include <linux/version.h>
36 #include <linux/mutex.h>
39 #include <media/v4l2-common.h>
40 #include <media/msp3400.h>
41 #include <media/tuner.h>
43 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
44 "Markus Rechberger <mrechberger@gmail.com>, " \
45 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
46 "Sascha Sommer <saschasommer@freenet.de>"
48 #define DRIVER_NAME "em28xx"
49 #define DRIVER_DESC "Empia em28xx based USB video device driver"
50 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 0)
52 #define em28xx_videodbg(fmt, arg...) do {\
54 printk(KERN_INFO "%s %s :"fmt, \
55 dev->name, __FUNCTION__ , ##arg); } while (0)
57 MODULE_AUTHOR(DRIVER_AUTHOR);
58 MODULE_DESCRIPTION(DRIVER_DESC);
59 MODULE_LICENSE("GPL");
61 static LIST_HEAD(em28xx_devlist);
63 static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
64 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
65 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
66 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
68 module_param_array(card, int, NULL, 0444);
69 module_param_array(video_nr, int, NULL, 0444);
70 module_param_array(vbi_nr, int, NULL, 0444);
71 module_param_array(radio_nr, int, NULL, 0444);
72 MODULE_PARM_DESC(card, "card type");
73 MODULE_PARM_DESC(video_nr, "video device numbers");
74 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
75 MODULE_PARM_DESC(radio_nr, "radio device numbers");
77 static unsigned int video_debug = 0;
78 module_param(video_debug,int,0644);
79 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
81 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
82 static unsigned long em28xx_devused;
84 /* supported controls */
85 /* Common to all boards */
86 static struct v4l2_queryctrl em28xx_qctrl[] = {
88 .id = V4L2_CID_AUDIO_VOLUME,
89 .type = V4L2_CTRL_TYPE_INTEGER,
94 .default_value = 0x1f,
97 .id = V4L2_CID_AUDIO_MUTE,
98 .type = V4L2_CTRL_TYPE_BOOLEAN,
108 static struct usb_driver em28xx_usb_driver;
111 /********************* v4l2 interface ******************************************/
115 * inits registers with sane defaults
117 static int em28xx_config(struct em28xx *dev)
120 /* Sets I2C speed to 100 KHz */
122 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
124 /* enable vbi capturing */
126 /* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
127 /* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
128 em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
130 dev->mute = 1; /* maybe not the right place... */
133 em28xx_outfmt_set_yuv422(dev);
134 em28xx_colorlevels_set_default(dev);
135 em28xx_compression_disable(dev);
141 * em28xx_config_i2c()
142 * configure i2c attached devices
144 static void em28xx_config_i2c(struct em28xx *dev)
146 struct v4l2_routing route;
148 route.input = INPUT(dev->ctl_input)->vmux;
150 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
151 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
152 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
156 * em28xx_empty_framequeues()
157 * prepare queues for incoming and outgoing frames
159 static void em28xx_empty_framequeues(struct em28xx *dev)
163 INIT_LIST_HEAD(&dev->inqueue);
164 INIT_LIST_HEAD(&dev->outqueue);
166 for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
167 dev->frame[i].state = F_UNUSED;
168 dev->frame[i].buf.bytesused = 0;
172 static void video_mux(struct em28xx *dev, int index)
174 struct v4l2_routing route;
176 route.input = INPUT(index)->vmux;
178 dev->ctl_input = index;
179 dev->ctl_ainput = INPUT(index)->amux;
181 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
183 if (dev->has_msp34xx) {
185 em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
186 route.input = dev->ctl_ainput;
187 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
188 /* Note: this is msp3400 specific */
189 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
192 em28xx_set_audio_source(dev);
195 /* Usage lock check functions */
196 static int res_get(struct em28xx_fh *fh)
198 struct em28xx *dev = fh->dev;
201 /* This instance already has stream_on */
205 mutex_lock(&dev->lock);
214 mutex_unlock(&dev->lock);
218 static int res_check(struct em28xx_fh *fh)
220 return (fh->stream_on);
223 static void res_free(struct em28xx_fh *fh)
225 struct em28xx *dev = fh->dev;
227 mutex_lock(&dev->lock);
230 mutex_unlock(&dev->lock);
236 static void em28xx_vm_open(struct vm_area_struct *vma)
238 struct em28xx_frame_t *f = vma->vm_private_data;
245 static void em28xx_vm_close(struct vm_area_struct *vma)
247 /* NOTE: buffers are not freed here */
248 struct em28xx_frame_t *f = vma->vm_private_data;
250 if (f->vma_use_count)
254 static struct vm_operations_struct em28xx_vm_ops = {
255 .open = em28xx_vm_open,
256 .close = em28xx_vm_close,
262 * return the current saturation, brightness or contrast, mute state
264 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
267 case V4L2_CID_AUDIO_MUTE:
268 ctrl->value = dev->mute;
270 case V4L2_CID_AUDIO_VOLUME:
271 ctrl->value = dev->volume;
280 * mute or set new saturation, brightness or contrast
282 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
285 case V4L2_CID_AUDIO_MUTE:
286 if (ctrl->value != dev->mute) {
287 dev->mute = ctrl->value;
288 return em28xx_audio_analog_set(dev);
291 case V4L2_CID_AUDIO_VOLUME:
292 dev->volume = ctrl->value;
293 return em28xx_audio_analog_set(dev);
300 * em28xx_stream_interrupt()
303 static int em28xx_stream_interrupt(struct em28xx *dev)
307 /* stop reading from the device */
309 dev->stream = STREAM_INTERRUPT;
310 rc = wait_event_timeout(dev->wait_stream,
311 (dev->stream == STREAM_OFF) ||
312 (dev->state & DEV_DISCONNECTED),
316 dev->state |= DEV_MISCONFIGURED;
317 em28xx_videodbg("device is misconfigured; close and "
318 "open /dev/video%d again\n",
319 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
327 static int check_dev(struct em28xx *dev)
329 if (dev->state & DEV_DISCONNECTED) {
330 em28xx_errdev("v4l2 ioctl: device not present\n");
334 if (dev->state & DEV_MISCONFIGURED) {
335 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
336 "close and open it again\n");
342 static void get_scale(struct em28xx *dev,
343 unsigned int width, unsigned int height,
344 unsigned int *hscale, unsigned int *vscale)
346 unsigned int maxw = norm_maxw(dev);
347 unsigned int maxh = norm_maxh(dev);
349 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
350 if (*hscale >= 0x4000)
353 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
354 if (*vscale >= 0x4000)
358 /* ------------------------------------------------------------------
359 IOCTL vidioc handling
360 ------------------------------------------------------------------*/
362 static int vidioc_g_fmt_cap(struct file *file, void *priv,
363 struct v4l2_format *f)
365 struct em28xx_fh *fh = priv;
366 struct em28xx *dev = fh->dev;
368 mutex_lock(&dev->lock);
370 f->fmt.pix.width = dev->width;
371 f->fmt.pix.height = dev->height;
372 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
373 f->fmt.pix.bytesperline = dev->bytesperline;
374 f->fmt.pix.sizeimage = dev->frame_size;
375 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
377 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
378 f->fmt.pix.field = dev->interlaced ?
379 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
381 mutex_unlock(&dev->lock);
385 static int vidioc_try_fmt_cap(struct file *file, void *priv,
386 struct v4l2_format *f)
388 struct em28xx_fh *fh = priv;
389 struct em28xx *dev = fh->dev;
390 int width = f->fmt.pix.width;
391 int height = f->fmt.pix.height;
392 unsigned int maxw = norm_maxw(dev);
393 unsigned int maxh = norm_maxh(dev);
394 unsigned int hscale, vscale;
396 /* width must even because of the YUYV format
397 height must be even because of interlacing */
410 mutex_lock(&dev->lock);
412 if (dev->is_em2800) {
413 /* the em2800 can only scale down to 50% */
414 if (height % (maxh / 2))
416 if (width % (maxw / 2))
418 /* according to empiatech support */
419 /* the MaxPacketSize is to small to support */
420 /* framesizes larger than 640x480 @ 30 fps */
421 /* or 640x576 @ 25 fps. As this would cut */
422 /* of a part of the image we prefer */
423 /* 360x576 or 360x480 for now */
424 if (width == maxw && height == maxh)
428 get_scale(dev, width, height, &hscale, &vscale);
430 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
431 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
433 f->fmt.pix.width = width;
434 f->fmt.pix.height = height;
435 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
436 f->fmt.pix.bytesperline = width * 2;
437 f->fmt.pix.sizeimage = width * 2 * height;
438 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
439 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
441 mutex_unlock(&dev->lock);
445 static int vidioc_s_fmt_cap(struct file *file, void *priv,
446 struct v4l2_format *f)
448 struct em28xx_fh *fh = priv;
449 struct em28xx *dev = fh->dev;
456 vidioc_try_fmt_cap(file, priv, f);
458 mutex_lock(&dev->lock);
460 for (i = 0; i < dev->num_frames; i++)
461 if (dev->frame[i].vma_use_count) {
462 em28xx_videodbg("VIDIOC_S_FMT failed. "
463 "Unmap the buffers first.\n");
468 /* stop io in case it is already in progress */
469 if (dev->stream == STREAM_ON) {
470 em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n");
471 rc = em28xx_stream_interrupt(dev);
476 em28xx_release_buffers(dev);
479 /* set new image size */
480 dev->width = f->fmt.pix.width;
481 dev->height = f->fmt.pix.height;
482 dev->frame_size = dev->width * dev->height * 2;
483 dev->field_size = dev->frame_size >> 1;
484 dev->bytesperline = dev->width * 2;
485 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
487 /* FIXME: This is really weird! Why capture is starting with
490 em28xx_uninit_isoc(dev);
491 em28xx_set_alternate(dev);
492 em28xx_capture_start(dev, 1);
493 em28xx_resolution_set(dev);
494 em28xx_init_isoc(dev);
498 mutex_unlock(&dev->lock);
502 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
504 struct em28xx_fh *fh = priv;
505 struct em28xx *dev = fh->dev;
506 struct v4l2_format f;
513 mutex_lock(&dev->lock);
515 mutex_unlock(&dev->lock);
517 /* Adjusts width/height, if needed */
518 f.fmt.pix.width = dev->width;
519 f.fmt.pix.height = dev->height;
520 vidioc_try_fmt_cap(file, priv, &f);
522 mutex_lock(&dev->lock);
524 /* set new image size */
525 dev->width = f.fmt.pix.width;
526 dev->height = f.fmt.pix.height;
527 dev->frame_size = dev->width * dev->height * 2;
528 dev->field_size = dev->frame_size >> 1;
529 dev->bytesperline = dev->width * 2;
530 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
532 em28xx_resolution_set(dev);
533 em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
535 mutex_unlock(&dev->lock);
539 static const char *iname[] = {
540 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
541 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
542 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
543 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
544 [EM28XX_VMUX_SVIDEO] = "S-Video",
545 [EM28XX_VMUX_TELEVISION] = "Television",
546 [EM28XX_VMUX_CABLE] = "Cable TV",
547 [EM28XX_VMUX_DVB] = "DVB",
548 [EM28XX_VMUX_DEBUG] = "for debug only",
551 static int vidioc_enum_input(struct file *file, void *priv,
552 struct v4l2_input *i)
554 struct em28xx_fh *fh = priv;
555 struct em28xx *dev = fh->dev;
559 if (n >= MAX_EM28XX_INPUT)
561 if (0 == INPUT(n)->type)
565 i->type = V4L2_INPUT_TYPE_CAMERA;
567 strcpy(i->name, iname[INPUT(n)->type]);
569 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
570 (EM28XX_VMUX_CABLE == INPUT(n)->type))
571 i->type = V4L2_INPUT_TYPE_TUNER;
573 i->std = dev->vdev->tvnorms;
578 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
580 struct em28xx_fh *fh = priv;
581 struct em28xx *dev = fh->dev;
588 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
590 struct em28xx_fh *fh = priv;
591 struct em28xx *dev = fh->dev;
598 if (i >= MAX_EM28XX_INPUT)
600 if (0 == INPUT(i)->type)
603 mutex_lock(&dev->lock);
607 mutex_unlock(&dev->lock);
611 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
613 struct em28xx_fh *fh = priv;
614 struct em28xx *dev = fh->dev;
615 unsigned int index = a->index;
620 index = dev->ctl_ainput;
623 strcpy(a->name, "Television");
625 strcpy(a->name, "Line In");
627 a->capability = V4L2_AUDCAP_STEREO;
633 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
635 struct em28xx_fh *fh = priv;
636 struct em28xx *dev = fh->dev;
638 if (a->index != dev->ctl_ainput)
644 static int vidioc_queryctrl(struct file *file, void *priv,
645 struct v4l2_queryctrl *qc)
647 struct em28xx_fh *fh = priv;
648 struct em28xx *dev = fh->dev;
657 memset(qc, 0, sizeof(*qc));
661 if (!dev->has_msp34xx) {
662 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
663 if (qc->id && qc->id == em28xx_qctrl[i].id) {
664 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
669 mutex_lock(&dev->lock);
670 em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
671 mutex_unlock(&dev->lock);
679 static int vidioc_g_ctrl(struct file *file, void *priv,
680 struct v4l2_control *ctrl)
682 struct em28xx_fh *fh = priv;
683 struct em28xx *dev = fh->dev;
689 mutex_lock(&dev->lock);
691 if (!dev->has_msp34xx)
692 rc = em28xx_get_ctrl(dev, ctrl);
697 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
701 mutex_unlock(&dev->lock);
705 static int vidioc_s_ctrl(struct file *file, void *priv,
706 struct v4l2_control *ctrl)
708 struct em28xx_fh *fh = priv;
709 struct em28xx *dev = fh->dev;
717 mutex_lock(&dev->lock);
719 if (dev->has_msp34xx)
720 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
723 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
724 if (ctrl->id == em28xx_qctrl[i].id) {
725 if (ctrl->value < em28xx_qctrl[i].minimum ||
726 ctrl->value > em28xx_qctrl[i].maximum) {
731 rc = em28xx_set_ctrl(dev, ctrl);
737 /* Control not found - try to send it to the attached devices */
739 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
743 mutex_unlock(&dev->lock);
747 static int vidioc_g_tuner(struct file *file, void *priv,
748 struct v4l2_tuner *t)
750 struct em28xx_fh *fh = priv;
751 struct em28xx *dev = fh->dev;
761 strcpy(t->name, "Tuner");
763 mutex_lock(&dev->lock);
765 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
767 mutex_unlock(&dev->lock);
771 static int vidioc_s_tuner(struct file *file, void *priv,
772 struct v4l2_tuner *t)
774 struct em28xx_fh *fh = priv;
775 struct em28xx *dev = fh->dev;
785 mutex_lock(&dev->lock);
787 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
789 mutex_unlock(&dev->lock);
793 static int vidioc_g_frequency(struct file *file, void *priv,
794 struct v4l2_frequency *f)
796 struct em28xx_fh *fh = priv;
797 struct em28xx *dev = fh->dev;
799 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
800 f->frequency = dev->ctl_freq;
805 static int vidioc_s_frequency(struct file *file, void *priv,
806 struct v4l2_frequency *f)
808 struct em28xx_fh *fh = priv;
809 struct em28xx *dev = fh->dev;
819 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
821 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
824 mutex_lock(&dev->lock);
826 dev->ctl_freq = f->frequency;
827 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
829 mutex_unlock(&dev->lock);
833 #ifdef CONFIG_VIDEO_ADV_DEBUG
834 static int em28xx_reg_len(int reg)
847 static int vidioc_g_register(struct file *file, void *priv,
848 struct v4l2_register *reg)
850 struct em28xx_fh *fh = priv;
851 struct em28xx *dev = fh->dev;
854 if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
857 if (em28xx_reg_len(reg->reg) == 1) {
858 ret = em28xx_read_reg(dev, reg->reg);
865 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
866 reg->reg, (char *)&val, 2);
876 static int vidioc_s_register(struct file *file, void *priv,
877 struct v4l2_register *reg)
879 struct em28xx_fh *fh = priv;
880 struct em28xx *dev = fh->dev;
883 buf = be16_to_cpu((__u16)reg->val);
885 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
886 em28xx_reg_len(reg->reg));
891 static int vidioc_cropcap(struct file *file, void *priv,
892 struct v4l2_cropcap *cc)
894 struct em28xx_fh *fh = priv;
895 struct em28xx *dev = fh->dev;
897 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
902 cc->bounds.width = dev->width;
903 cc->bounds.height = dev->height;
904 cc->defrect = cc->bounds;
905 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
906 cc->pixelaspect.denominator = 59;
911 static int vidioc_streamon(struct file *file, void *priv,
912 enum v4l2_buf_type type)
914 struct em28xx_fh *fh = priv;
915 struct em28xx *dev = fh->dev;
922 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
925 if (list_empty(&dev->inqueue))
928 mutex_lock(&dev->lock);
930 if (unlikely(res_get(fh) < 0)) {
931 mutex_unlock(&dev->lock);
935 dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
937 mutex_unlock(&dev->lock);
941 static int vidioc_streamoff(struct file *file, void *priv,
942 enum v4l2_buf_type type)
944 struct em28xx_fh *fh = priv;
945 struct em28xx *dev = fh->dev;
952 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
955 mutex_lock(&dev->lock);
957 if (dev->stream == STREAM_ON) {
958 em28xx_videodbg("VIDIOC_STREAMOFF: interrupting stream\n");
959 rc = em28xx_stream_interrupt(dev);
961 mutex_unlock(&dev->lock);
966 em28xx_empty_framequeues(dev);
968 mutex_unlock(&dev->lock);
972 static int vidioc_querycap(struct file *file, void *priv,
973 struct v4l2_capability *cap)
975 struct em28xx_fh *fh = priv;
976 struct em28xx *dev = fh->dev;
978 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
979 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
980 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
982 cap->version = EM28XX_VERSION_CODE;
985 V4L2_CAP_SLICED_VBI_CAPTURE |
986 V4L2_CAP_VIDEO_CAPTURE |
988 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
990 if (dev->tuner_type != TUNER_ABSENT)
991 cap->capabilities |= V4L2_CAP_TUNER;
996 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
997 struct v4l2_fmtdesc *fmtd)
999 if (fmtd->index != 0)
1002 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1003 strcpy(fmtd->description, "Packed YUY2");
1004 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1005 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1010 /* Sliced VBI ioctls */
1011 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
1012 struct v4l2_format *f)
1014 struct em28xx_fh *fh = priv;
1015 struct em28xx *dev = fh->dev;
1018 rc = check_dev(dev);
1022 mutex_lock(&dev->lock);
1024 f->fmt.sliced.service_set = 0;
1026 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1028 if (f->fmt.sliced.service_set == 0)
1031 mutex_unlock(&dev->lock);
1035 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
1036 struct v4l2_format *f)
1038 struct em28xx_fh *fh = priv;
1039 struct em28xx *dev = fh->dev;
1042 rc = check_dev(dev);
1046 mutex_lock(&dev->lock);
1047 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1048 mutex_unlock(&dev->lock);
1050 if (f->fmt.sliced.service_set == 0)
1057 static int vidioc_reqbufs(struct file *file, void *priv,
1058 struct v4l2_requestbuffers *rb)
1060 struct em28xx_fh *fh = priv;
1061 struct em28xx *dev = fh->dev;
1065 rc = check_dev(dev);
1069 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1070 rb->memory != V4L2_MEMORY_MMAP)
1073 if (dev->io == IO_READ) {
1074 em28xx_videodbg("method is set to read;"
1075 " close and open the device again to"
1076 " choose the mmap I/O method\n");
1080 for (i = 0; i < dev->num_frames; i++)
1081 if (dev->frame[i].vma_use_count) {
1082 em28xx_videodbg("VIDIOC_REQBUFS failed; "
1083 "previous buffers are still mapped\n");
1087 mutex_lock(&dev->lock);
1089 if (dev->stream == STREAM_ON) {
1090 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1091 rc = em28xx_stream_interrupt(dev);
1093 mutex_unlock(&dev->lock);
1098 em28xx_empty_framequeues(dev);
1100 em28xx_release_buffers(dev);
1102 rb->count = em28xx_request_buffers(dev, rb->count);
1104 dev->frame_current = NULL;
1105 dev->io = rb->count ? IO_MMAP : IO_NONE;
1107 mutex_unlock(&dev->lock);
1111 static int vidioc_querybuf(struct file *file, void *priv,
1112 struct v4l2_buffer *b)
1114 struct em28xx_fh *fh = priv;
1115 struct em28xx *dev = fh->dev;
1118 rc = check_dev(dev);
1122 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1123 b->index >= dev->num_frames || dev->io != IO_MMAP)
1126 mutex_lock(&dev->lock);
1128 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1130 if (dev->frame[b->index].vma_use_count)
1131 b->flags |= V4L2_BUF_FLAG_MAPPED;
1133 if (dev->frame[b->index].state == F_DONE)
1134 b->flags |= V4L2_BUF_FLAG_DONE;
1135 else if (dev->frame[b->index].state != F_UNUSED)
1136 b->flags |= V4L2_BUF_FLAG_QUEUED;
1138 mutex_unlock(&dev->lock);
1142 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1144 struct em28xx_fh *fh = priv;
1145 struct em28xx *dev = fh->dev;
1146 unsigned long lock_flags;
1149 rc = check_dev(dev);
1153 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP ||
1154 b->index >= dev->num_frames)
1157 if (dev->frame[b->index].state != F_UNUSED)
1160 dev->frame[b->index].state = F_QUEUED;
1162 /* add frame to fifo */
1163 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1164 list_add_tail(&dev->frame[b->index].frame, &dev->inqueue);
1165 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1170 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1172 struct em28xx_fh *fh = priv;
1173 struct em28xx *dev = fh->dev;
1175 struct em28xx_frame_t *f;
1176 unsigned long lock_flags;
1178 rc = check_dev(dev);
1182 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
1185 if (list_empty(&dev->outqueue)) {
1186 if (dev->stream == STREAM_OFF)
1189 if (file->f_flags & O_NONBLOCK)
1192 rc = wait_event_interruptible(dev->wait_frame,
1193 (!list_empty(&dev->outqueue)) ||
1194 (dev->state & DEV_DISCONNECTED));
1198 if (dev->state & DEV_DISCONNECTED)
1202 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1203 f = list_entry(dev->outqueue.next, struct em28xx_frame_t, frame);
1204 list_del(dev->outqueue.next);
1205 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1207 f->state = F_UNUSED;
1208 memcpy(b, &f->buf, sizeof(*b));
1210 if (f->vma_use_count)
1211 b->flags |= V4L2_BUF_FLAG_MAPPED;
1216 /* ----------------------------------------------------------- */
1217 /* RADIO ESPECIFIC IOCTLS */
1218 /* ----------------------------------------------------------- */
1220 static int radio_querycap(struct file *file, void *priv,
1221 struct v4l2_capability *cap)
1223 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1225 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1226 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1227 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1229 cap->version = EM28XX_VERSION_CODE;
1230 cap->capabilities = V4L2_CAP_TUNER;
1234 static int radio_g_tuner(struct file *file, void *priv,
1235 struct v4l2_tuner *t)
1237 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1239 if (unlikely(t->index > 0))
1242 strcpy(t->name, "Radio");
1243 t->type = V4L2_TUNER_RADIO;
1245 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1249 static int radio_enum_input(struct file *file, void *priv,
1250 struct v4l2_input *i)
1254 strcpy(i->name, "Radio");
1255 i->type = V4L2_INPUT_TYPE_TUNER;
1260 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1262 if (unlikely(a->index))
1265 strcpy(a->name, "Radio");
1269 static int radio_s_tuner(struct file *file, void *priv,
1270 struct v4l2_tuner *t)
1272 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1277 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1282 static int radio_s_audio(struct file *file, void *fh,
1283 struct v4l2_audio *a)
1288 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1293 static int radio_queryctrl(struct file *file, void *priv,
1294 struct v4l2_queryctrl *qc)
1298 if (qc->id < V4L2_CID_BASE ||
1299 qc->id >= V4L2_CID_LASTP1)
1302 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1303 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1304 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1313 * em28xx_v4l2_open()
1314 * inits the device and starts isoc transfer
1316 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1318 int minor = iminor(inode);
1319 int errCode = 0, radio = 0;
1320 struct em28xx *h,*dev = NULL;
1321 struct em28xx_fh *fh;
1323 list_for_each_entry(h, &em28xx_devlist, devlist) {
1324 if (h->vdev->minor == minor) {
1326 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1328 if (h->vbi_dev->minor == minor) {
1330 dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1333 h->radio_dev->minor == minor) {
1341 em28xx_videodbg("open minor=%d type=%s users=%d\n",
1342 minor,v4l2_type_names[dev->type],dev->users);
1344 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1347 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1350 mutex_lock(&dev->lock);
1353 filp->private_data = fh;
1355 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1356 em28xx_set_alternate(dev);
1358 dev->width = norm_maxw(dev);
1359 dev->height = norm_maxh(dev);
1360 dev->frame_size = dev->width * dev->height * 2;
1361 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1362 dev->bytesperline = dev->width * 2;
1366 em28xx_capture_start(dev, 1);
1367 em28xx_resolution_set(dev);
1370 /* start the transfer */
1371 errCode = em28xx_init_isoc(dev);
1375 em28xx_empty_framequeues(dev);
1378 em28xx_videodbg("video_open: setting radio device\n");
1379 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1385 mutex_unlock(&dev->lock);
1390 * em28xx_realease_resources()
1391 * unregisters the v4l2,i2c and usb devices
1392 * called when the device gets disconected or at module unload
1394 static void em28xx_release_resources(struct em28xx *dev)
1397 /*FIXME: I2C IR should be disconnected */
1399 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1400 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1401 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1402 list_del(&dev->devlist);
1403 if (dev->radio_dev) {
1404 if (-1 != dev->radio_dev->minor)
1405 video_unregister_device(dev->radio_dev);
1407 video_device_release(dev->radio_dev);
1408 dev->radio_dev = NULL;
1411 if (-1 != dev->vbi_dev->minor)
1412 video_unregister_device(dev->vbi_dev);
1414 video_device_release(dev->vbi_dev);
1415 dev->vbi_dev = NULL;
1418 if (-1 != dev->vdev->minor)
1419 video_unregister_device(dev->vdev);
1421 video_device_release(dev->vdev);
1424 em28xx_i2c_unregister(dev);
1425 usb_put_dev(dev->udev);
1427 /* Mark device as unused */
1428 em28xx_devused&=~(1<<dev->devno);
1432 * em28xx_v4l2_close()
1433 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
1435 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1437 struct em28xx_fh *fh = filp->private_data;
1438 struct em28xx *dev = fh->dev;
1441 em28xx_videodbg("users=%d\n", dev->users);
1447 mutex_lock(&dev->lock);
1449 if (dev->users == 1) {
1450 em28xx_uninit_isoc(dev);
1451 em28xx_release_buffers(dev);
1454 /* the device is already disconnect,
1455 free the remaining resources */
1456 if (dev->state & DEV_DISCONNECTED) {
1457 em28xx_release_resources(dev);
1458 mutex_unlock(&dev->lock);
1463 /* set alternate 0 */
1465 em28xx_videodbg("setting alternate 0\n");
1466 errCode = usb_set_interface(dev->udev, 0, 0);
1468 em28xx_errdev("cannot change alternate number to "
1469 "0 (error=%i)\n", errCode);
1474 wake_up_interruptible_nr(&dev->open, 1);
1475 mutex_unlock(&dev->lock);
1480 * em28xx_v4l2_read()
1481 * will allocate buffers when called for the first time
1484 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
1487 struct em28xx_frame_t *f, *i;
1488 unsigned long lock_flags;
1490 struct em28xx_fh *fh = filp->private_data;
1491 struct em28xx *dev = fh->dev;
1493 /* FIXME: read() is not prepared to allow changing the video
1494 resolution while streaming. Seems a bug at em28xx_set_fmt
1497 if (unlikely(res_get(fh) < 0))
1500 mutex_lock(&dev->lock);
1502 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1503 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
1505 if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1506 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
1507 em28xx_videodbg("not supported yet! ...\n");
1508 if (copy_to_user(buf, "", 1)) {
1509 mutex_unlock(&dev->lock);
1512 mutex_unlock(&dev->lock);
1515 if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
1516 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
1517 em28xx_videodbg("not supported yet! ...\n");
1518 if (copy_to_user(buf, "", 1)) {
1519 mutex_unlock(&dev->lock);
1522 mutex_unlock(&dev->lock);
1526 if (dev->state & DEV_DISCONNECTED) {
1527 em28xx_videodbg("device not present\n");
1528 mutex_unlock(&dev->lock);
1532 if (dev->state & DEV_MISCONFIGURED) {
1533 em28xx_videodbg("device misconfigured; close and open it again\n");
1534 mutex_unlock(&dev->lock);
1538 if (dev->io == IO_MMAP) {
1539 em28xx_videodbg ("IO method is set to mmap; close and open"
1540 " the device again to choose the read method\n");
1541 mutex_unlock(&dev->lock);
1545 if (dev->io == IO_NONE) {
1546 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
1547 em28xx_errdev("read failed, not enough memory\n");
1548 mutex_unlock(&dev->lock);
1552 dev->stream = STREAM_ON;
1553 em28xx_queue_unusedframes(dev);
1557 mutex_unlock(&dev->lock);
1561 if (list_empty(&dev->outqueue)) {
1562 if (filp->f_flags & O_NONBLOCK) {
1563 mutex_unlock(&dev->lock);
1566 ret = wait_event_interruptible
1568 (!list_empty(&dev->outqueue)) ||
1569 (dev->state & DEV_DISCONNECTED));
1571 mutex_unlock(&dev->lock);
1574 if (dev->state & DEV_DISCONNECTED) {
1575 mutex_unlock(&dev->lock);
1578 dev->video_bytesread = 0;
1581 f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
1583 em28xx_queue_unusedframes(dev);
1585 if (count > f->buf.length)
1586 count = f->buf.length;
1588 if ((dev->video_bytesread + count) > dev->frame_size)
1589 count = dev->frame_size - dev->video_bytesread;
1591 if (copy_to_user(buf, f->bufmem+dev->video_bytesread, count)) {
1592 em28xx_err("Error while copying to user\n");
1595 dev->video_bytesread += count;
1597 if (dev->video_bytesread == dev->frame_size) {
1598 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1599 list_for_each_entry(i, &dev->outqueue, frame)
1600 i->state = F_UNUSED;
1601 INIT_LIST_HEAD(&dev->outqueue);
1602 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1604 em28xx_queue_unusedframes(dev);
1605 dev->video_bytesread = 0;
1610 mutex_unlock(&dev->lock);
1616 * em28xx_v4l2_poll()
1617 * will allocate buffers when called for the first time
1619 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1621 unsigned int mask = 0;
1622 struct em28xx_fh *fh = filp->private_data;
1623 struct em28xx *dev = fh->dev;
1625 if (unlikely(res_get(fh) < 0))
1628 mutex_lock(&dev->lock);
1630 if (dev->state & DEV_DISCONNECTED) {
1631 em28xx_videodbg("device not present\n");
1632 } else if (dev->state & DEV_MISCONFIGURED) {
1633 em28xx_videodbg("device is misconfigured; close and open it again\n");
1635 if (dev->io == IO_NONE) {
1636 if (!em28xx_request_buffers
1637 (dev, EM28XX_NUM_READ_FRAMES)) {
1639 ("poll() failed, not enough memory\n");
1642 dev->stream = STREAM_ON;
1646 if (dev->io == IO_READ) {
1647 em28xx_queue_unusedframes(dev);
1648 poll_wait(filp, &dev->wait_frame, wait);
1650 if (!list_empty(&dev->outqueue))
1651 mask |= POLLIN | POLLRDNORM;
1653 mutex_unlock(&dev->lock);
1659 mutex_unlock(&dev->lock);
1664 * em28xx_v4l2_mmap()
1666 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1668 struct em28xx_fh *fh = filp->private_data;
1669 struct em28xx *dev = fh->dev;
1670 unsigned long size = vma->vm_end - vma->vm_start;
1671 unsigned long start = vma->vm_start;
1675 if (unlikely(res_get(fh) < 0))
1678 mutex_lock(&dev->lock);
1680 if (dev->state & DEV_DISCONNECTED) {
1681 em28xx_videodbg("mmap: device not present\n");
1682 mutex_unlock(&dev->lock);
1686 if (dev->state & DEV_MISCONFIGURED) {
1687 em28xx_videodbg ("mmap: Device is misconfigured; close and "
1689 mutex_unlock(&dev->lock);
1693 if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE)) {
1694 mutex_unlock(&dev->lock);
1698 if (size > PAGE_ALIGN(dev->frame[0].buf.length))
1699 size = PAGE_ALIGN(dev->frame[0].buf.length);
1701 for (i = 0; i < dev->num_frames; i++) {
1702 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
1705 if (i == dev->num_frames) {
1706 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
1707 mutex_unlock(&dev->lock);
1711 /* VM_IO is eventually going to replace PageReserved altogether */
1712 vma->vm_flags |= VM_IO;
1713 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
1715 pos = dev->frame[i].bufmem;
1716 while (size > 0) { /* size is page-aligned */
1717 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1718 em28xx_videodbg("mmap: vm_insert_page failed\n");
1719 mutex_unlock(&dev->lock);
1727 vma->vm_ops = &em28xx_vm_ops;
1728 vma->vm_private_data = &dev->frame[i];
1730 em28xx_vm_open(vma);
1731 mutex_unlock(&dev->lock);
1735 static const struct file_operations em28xx_v4l_fops = {
1736 .owner = THIS_MODULE,
1737 .open = em28xx_v4l2_open,
1738 .release = em28xx_v4l2_close,
1739 .read = em28xx_v4l2_read,
1740 .poll = em28xx_v4l2_poll,
1741 .mmap = em28xx_v4l2_mmap,
1742 .ioctl = video_ioctl2,
1743 .llseek = no_llseek,
1744 .compat_ioctl = v4l_compat_ioctl32,
1747 static const struct file_operations radio_fops = {
1748 .owner = THIS_MODULE,
1749 .open = em28xx_v4l2_open,
1750 .release = em28xx_v4l2_close,
1751 .ioctl = video_ioctl2,
1752 .compat_ioctl = v4l_compat_ioctl32,
1753 .llseek = no_llseek,
1756 static const struct video_device em28xx_video_template = {
1757 .fops = &em28xx_v4l_fops,
1758 .release = video_device_release,
1761 .vidioc_querycap = vidioc_querycap,
1762 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1763 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1764 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1765 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1766 .vidioc_g_audio = vidioc_g_audio,
1767 .vidioc_s_audio = vidioc_s_audio,
1768 .vidioc_cropcap = vidioc_cropcap,
1770 .vidioc_g_fmt_vbi_capture = vidioc_g_fmt_vbi_capture,
1771 .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1772 .vidioc_s_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1774 .vidioc_reqbufs = vidioc_reqbufs,
1775 .vidioc_querybuf = vidioc_querybuf,
1776 .vidioc_qbuf = vidioc_qbuf,
1777 .vidioc_dqbuf = vidioc_dqbuf,
1778 .vidioc_s_std = vidioc_s_std,
1779 .vidioc_enum_input = vidioc_enum_input,
1780 .vidioc_g_input = vidioc_g_input,
1781 .vidioc_s_input = vidioc_s_input,
1782 .vidioc_queryctrl = vidioc_queryctrl,
1783 .vidioc_g_ctrl = vidioc_g_ctrl,
1784 .vidioc_s_ctrl = vidioc_s_ctrl,
1785 .vidioc_streamon = vidioc_streamon,
1786 .vidioc_streamoff = vidioc_streamoff,
1787 .vidioc_g_tuner = vidioc_g_tuner,
1788 .vidioc_s_tuner = vidioc_s_tuner,
1789 .vidioc_g_frequency = vidioc_g_frequency,
1790 .vidioc_s_frequency = vidioc_s_frequency,
1791 #ifdef CONFIG_VIDEO_ADV_DEBUG
1792 .vidioc_g_register = vidioc_g_register,
1793 .vidioc_s_register = vidioc_s_register,
1796 .tvnorms = V4L2_STD_ALL,
1797 .current_norm = V4L2_STD_PAL,
1800 static struct video_device em28xx_radio_template = {
1801 .name = "em28xx-radio",
1802 .type = VID_TYPE_TUNER,
1803 .fops = &radio_fops,
1805 .vidioc_querycap = radio_querycap,
1806 .vidioc_g_tuner = radio_g_tuner,
1807 .vidioc_enum_input = radio_enum_input,
1808 .vidioc_g_audio = radio_g_audio,
1809 .vidioc_s_tuner = radio_s_tuner,
1810 .vidioc_s_audio = radio_s_audio,
1811 .vidioc_s_input = radio_s_input,
1812 .vidioc_queryctrl = radio_queryctrl,
1813 .vidioc_g_ctrl = vidioc_g_ctrl,
1814 .vidioc_s_ctrl = vidioc_s_ctrl,
1815 .vidioc_g_frequency = vidioc_g_frequency,
1816 .vidioc_s_frequency = vidioc_s_frequency,
1817 #ifdef CONFIG_VIDEO_ADV_DEBUG
1818 .vidioc_g_register = vidioc_g_register,
1819 .vidioc_s_register = vidioc_s_register,
1823 /******************************** usb interface *****************************************/
1826 static LIST_HEAD(em28xx_extension_devlist);
1827 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1829 int em28xx_register_extension(struct em28xx_ops *ops)
1831 struct em28xx *h, *dev = NULL;
1833 list_for_each_entry(h, &em28xx_devlist, devlist)
1836 mutex_lock(&em28xx_extension_devlist_lock);
1837 list_add_tail(&ops->next, &em28xx_extension_devlist);
1841 printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1842 mutex_unlock(&em28xx_extension_devlist_lock);
1846 EXPORT_SYMBOL(em28xx_register_extension);
1848 void em28xx_unregister_extension(struct em28xx_ops *ops)
1850 struct em28xx *h, *dev = NULL;
1852 list_for_each_entry(h, &em28xx_devlist, devlist)
1858 mutex_lock(&em28xx_extension_devlist_lock);
1859 printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1860 list_del(&ops->next);
1861 mutex_unlock(&em28xx_extension_devlist_lock);
1863 EXPORT_SYMBOL(em28xx_unregister_extension);
1865 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1866 const struct video_device *template,
1868 const char *type_name)
1870 struct video_device *vfd;
1872 vfd = video_device_alloc();
1877 vfd->dev = &dev->udev->dev;
1878 vfd->release = video_device_release;
1881 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1882 dev->name, type_name);
1890 * allocates and inits the device structs, registers i2c bus and v4l device
1892 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1895 struct em28xx_ops *ops = NULL;
1896 struct em28xx *dev = *devhandle;
1897 int retval = -ENOMEM;
1899 unsigned int maxh, maxw;
1902 mutex_init(&dev->lock);
1903 spin_lock_init(&dev->queue_lock);
1904 init_waitqueue_head(&dev->open);
1905 init_waitqueue_head(&dev->wait_frame);
1906 init_waitqueue_head(&dev->wait_stream);
1908 dev->em28xx_write_regs = em28xx_write_regs;
1909 dev->em28xx_read_reg = em28xx_read_reg;
1910 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1911 dev->em28xx_write_regs_req = em28xx_write_regs_req;
1912 dev->em28xx_read_reg_req = em28xx_read_reg_req;
1913 dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
1915 errCode = em28xx_read_reg(dev, CHIPID_REG);
1917 em28xx_info("em28xx chip ID = %d\n", errCode);
1919 em28xx_pre_card_setup(dev);
1921 errCode = em28xx_config(dev);
1923 em28xx_errdev("error configuring device\n");
1924 em28xx_devused &= ~(1<<dev->devno);
1929 /* register i2c bus */
1930 em28xx_i2c_register(dev);
1932 /* Do board specific init and eeprom reading */
1933 em28xx_card_setup(dev);
1935 /* Configure audio */
1936 em28xx_audio_analog_set(dev);
1938 /* configure the device */
1939 em28xx_config_i2c(dev);
1941 /* set default norm */
1942 dev->norm = em28xx_video_template.current_norm;
1944 maxw = norm_maxw(dev);
1945 maxh = norm_maxh(dev);
1947 /* set default image size */
1950 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1951 dev->field_size = dev->width * dev->height;
1953 dev->interlaced ? dev->field_size << 1 : dev->field_size;
1954 dev->bytesperline = dev->width * 2;
1959 errCode = em28xx_config(dev);
1961 list_add_tail(&dev->devlist, &em28xx_devlist);
1963 /* allocate and fill video video_device struct */
1964 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
1965 VID_TYPE_CAPTURE, "video");
1966 if (NULL == dev->vdev) {
1967 em28xx_errdev("cannot allocate video_device.\n");
1970 if (dev->tuner_type != TUNER_ABSENT)
1971 dev->vdev->type |= VID_TYPE_TUNER;
1973 /* register v4l2 video video_device */
1974 retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1975 video_nr[dev->devno]);
1977 em28xx_errdev("unable to register video device (error=%i).\n",
1982 /* Allocate and fill vbi video_device struct */
1983 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
1984 VFL_TYPE_VBI, "vbi");
1985 /* register v4l2 vbi video_device */
1986 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1987 vbi_nr[dev->devno]) < 0) {
1988 em28xx_errdev("unable to register vbi device\n");
1993 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
1994 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
1995 VFL_TYPE_RADIO, "radio");
1996 if (NULL == dev->radio_dev) {
1997 em28xx_errdev("cannot allocate video_device.\n");
2000 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2001 radio_nr[dev->devno]);
2003 em28xx_errdev("can't register radio device\n");
2006 em28xx_info("Registered radio device as /dev/radio%d\n",
2007 dev->radio_dev->minor & 0x1f);
2011 if (dev->has_msp34xx) {
2012 /* Send a reset to other chips via gpio */
2013 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2015 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2021 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2022 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
2023 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
2025 mutex_lock(&em28xx_extension_devlist_lock);
2026 if (!list_empty(&em28xx_extension_devlist)) {
2027 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2032 mutex_unlock(&em28xx_extension_devlist_lock);
2037 em28xx_release_resources(dev);
2038 mutex_unlock(&dev->lock);
2043 #if defined(CONFIG_MODULES) && defined(MODULE)
2044 static void request_module_async(struct work_struct *work)
2046 struct em28xx *dev = container_of(work,
2047 struct em28xx, request_module_wk);
2049 if (dev->has_audio_class)
2050 request_module("snd-usb-audio");
2052 request_module("em28xx-alsa");
2055 static void request_modules(struct em28xx *dev)
2057 INIT_WORK(&dev->request_module_wk, request_module_async);
2058 schedule_work(&dev->request_module_wk);
2061 #define request_modules(dev)
2062 #endif /* CONFIG_MODULES */
2065 * em28xx_usb_probe()
2066 * checks for supported devices
2068 static int em28xx_usb_probe(struct usb_interface *interface,
2069 const struct usb_device_id *id)
2071 const struct usb_endpoint_descriptor *endpoint;
2072 struct usb_device *udev;
2073 struct usb_interface *uif;
2074 struct em28xx *dev = NULL;
2075 int retval = -ENODEV;
2078 udev = usb_get_dev(interface_to_usbdev(interface));
2079 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2081 /* Check to see next free device and mark as used */
2082 nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
2083 em28xx_devused|=1<<nr;
2085 /* Don't register audio interfaces */
2086 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2087 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2088 udev->descriptor.idVendor,udev->descriptor.idProduct,
2090 interface->altsetting[0].desc.bInterfaceClass);
2092 em28xx_devused&=~(1<<nr);
2096 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2097 udev->descriptor.idVendor,udev->descriptor.idProduct,
2099 interface->altsetting[0].desc.bInterfaceClass);
2101 endpoint = &interface->cur_altsetting->endpoint[1].desc;
2103 /* check if the device has the iso in endpoint at the correct place */
2104 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2105 USB_ENDPOINT_XFER_ISOC) {
2106 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2107 em28xx_devused&=~(1<<nr);
2110 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2111 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2112 em28xx_devused&=~(1<<nr);
2116 if (nr >= EM28XX_MAXBOARDS) {
2117 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
2118 em28xx_devused&=~(1<<nr);
2122 /* allocate memory for our device state and initialize it */
2123 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2125 em28xx_err(DRIVER_NAME ": out of memory!\n");
2126 em28xx_devused&=~(1<<nr);
2130 snprintf(dev->name, 29, "em28xx #%d", nr);
2132 dev->model = id->driver_info;
2134 /* Checks if audio is provided by some interface */
2135 for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2136 uif = udev->config->interface[i];
2137 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2138 dev->has_audio_class = 1;
2143 printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2144 dev->has_audio_class ? "Has" : "Doesn't have");
2146 /* compute alternate max packet sizes */
2147 uif = udev->actconfig->interface[0];
2149 dev->num_alt=uif->num_altsetting;
2150 em28xx_info("Alternate settings: %i\n",dev->num_alt);
2151 // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
2152 dev->alt_max_pkt_size = kmalloc(32*
2153 dev->num_alt,GFP_KERNEL);
2154 if (dev->alt_max_pkt_size == NULL) {
2155 em28xx_errdev("out of memory!\n");
2156 em28xx_devused&=~(1<<nr);
2161 for (i = 0; i < dev->num_alt ; i++) {
2162 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2164 dev->alt_max_pkt_size[i] =
2165 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2166 em28xx_info("Alternate setting %i, max size= %i\n",i,
2167 dev->alt_max_pkt_size[i]);
2170 if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
2171 dev->model = card[nr];
2173 /* allocate device struct */
2174 retval = em28xx_init_dev(&dev, udev, nr);
2178 em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2180 /* save our data pointer in this interface device */
2181 usb_set_intfdata(interface, dev);
2183 request_modules(dev);
2189 * em28xx_usb_disconnect()
2190 * called when the device gets diconencted
2191 * video device will be unregistered on v4l2_close in case it is still open
2193 static void em28xx_usb_disconnect(struct usb_interface *interface)
2196 struct em28xx_ops *ops = NULL;
2198 dev = usb_get_intfdata(interface);
2199 usb_set_intfdata(interface, NULL);
2204 em28xx_info("disconnecting %s\n", dev->vdev->name);
2206 /* wait until all current v4l2 io is finished then deallocate resources */
2207 mutex_lock(&dev->lock);
2209 wake_up_interruptible_all(&dev->open);
2213 ("device /dev/video%d is open! Deregistration and memory "
2214 "deallocation are deferred on close.\n",
2215 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2217 dev->state |= DEV_MISCONFIGURED;
2218 em28xx_uninit_isoc(dev);
2219 dev->state |= DEV_DISCONNECTED;
2220 wake_up_interruptible(&dev->wait_frame);
2221 wake_up_interruptible(&dev->wait_stream);
2223 dev->state |= DEV_DISCONNECTED;
2224 em28xx_release_resources(dev);
2226 mutex_unlock(&dev->lock);
2228 mutex_lock(&em28xx_extension_devlist_lock);
2229 if (!list_empty(&em28xx_extension_devlist)) {
2230 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2234 mutex_unlock(&em28xx_extension_devlist_lock);
2237 kfree(dev->alt_max_pkt_size);
2242 static struct usb_driver em28xx_usb_driver = {
2244 .probe = em28xx_usb_probe,
2245 .disconnect = em28xx_usb_disconnect,
2246 .id_table = em28xx_id_table,
2249 static int __init em28xx_module_init(void)
2253 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2254 (EM28XX_VERSION_CODE >> 16) & 0xff,
2255 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2257 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2258 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2261 /* register this driver with the USB subsystem */
2262 result = usb_register(&em28xx_usb_driver);
2264 em28xx_err(DRIVER_NAME
2265 " usb_register failed. Error number %d.\n", result);
2270 static void __exit em28xx_module_exit(void)
2272 /* deregister this driver with the USB subsystem */
2273 usb_deregister(&em28xx_usb_driver);
2276 module_init(em28xx_module_init);
2277 module_exit(em28xx_module_exit);