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>
42 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
43 "Markus Rechberger <mrechberger@gmail.com>, " \
44 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
45 "Sascha Sommer <saschasommer@freenet.de>"
47 #define DRIVER_NAME "em28xx"
48 #define DRIVER_DESC "Empia em28xx based USB video device driver"
49 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 0)
51 #define em28xx_videodbg(fmt, arg...) do {\
53 printk(KERN_INFO "%s %s :"fmt, \
54 dev->name, __FUNCTION__ , ##arg); } while (0)
56 MODULE_AUTHOR(DRIVER_AUTHOR);
57 MODULE_DESCRIPTION(DRIVER_DESC);
58 MODULE_LICENSE("GPL");
60 static LIST_HEAD(em28xx_devlist);
62 static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
63 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
64 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
65 module_param_array(card, int, NULL, 0444);
66 module_param_array(video_nr, int, NULL, 0444);
67 module_param_array(vbi_nr, int, NULL, 0444);
68 MODULE_PARM_DESC(card,"card type");
69 MODULE_PARM_DESC(video_nr,"video device numbers");
70 MODULE_PARM_DESC(vbi_nr,"vbi device numbers");
72 static unsigned int video_debug = 0;
73 module_param(video_debug,int,0644);
74 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
76 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
77 static unsigned long em28xx_devused;
79 /* supported controls */
80 /* Common to all boards */
81 static struct v4l2_queryctrl em28xx_qctrl[] = {
83 .id = V4L2_CID_AUDIO_VOLUME,
84 .type = V4L2_CTRL_TYPE_INTEGER,
89 .default_value = 0x1f,
92 .id = V4L2_CID_AUDIO_MUTE,
93 .type = V4L2_CTRL_TYPE_BOOLEAN,
103 static struct usb_driver em28xx_usb_driver;
106 /********************* v4l2 interface ******************************************/
110 * inits registers with sane defaults
112 static int em28xx_config(struct em28xx *dev)
115 /* Sets I2C speed to 100 KHz */
117 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
119 /* enable vbi capturing */
121 /* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
122 /* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
123 em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
125 dev->mute = 1; /* maybe not the right place... */
128 /* Init XCLK_REG, audio muted */
129 dev->em28xx_write_regs(dev, XCLK_REG, "\x87", 1);
131 em28xx_audio_analog_set(dev);
132 em28xx_outfmt_set_yuv422(dev);
133 em28xx_colorlevels_set_default(dev);
134 em28xx_compression_disable(dev);
140 * em28xx_config_i2c()
141 * configure i2c attached devices
143 static void em28xx_config_i2c(struct em28xx *dev)
145 struct v4l2_routing route;
147 route.input = INPUT(dev->ctl_input)->vmux;
149 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
150 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
151 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
155 * em28xx_empty_framequeues()
156 * prepare queues for incoming and outgoing frames
158 static void em28xx_empty_framequeues(struct em28xx *dev)
162 INIT_LIST_HEAD(&dev->inqueue);
163 INIT_LIST_HEAD(&dev->outqueue);
165 for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
166 dev->frame[i].state = F_UNUSED;
167 dev->frame[i].buf.bytesused = 0;
171 static void video_mux(struct em28xx *dev, int index)
173 struct v4l2_routing route;
175 route.input = INPUT(index)->vmux;
177 dev->ctl_input = index;
178 dev->ctl_ainput = INPUT(index)->amux;
180 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
182 if (dev->has_msp34xx) {
184 em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
185 route.input = dev->ctl_ainput;
186 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
187 /* Note: this is msp3400 specific */
188 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
191 em28xx_set_audio_source(dev);
194 /* Usage lock check functions */
195 static int res_get(struct em28xx_fh *fh)
197 struct em28xx *dev = fh->dev;
200 /* This instance already has stream_on */
204 mutex_lock(&dev->lock);
213 mutex_unlock(&dev->lock);
217 static int res_check(struct em28xx_fh *fh)
219 return (fh->stream_on);
222 static void res_free(struct em28xx_fh *fh)
224 struct em28xx *dev = fh->dev;
226 mutex_lock(&dev->lock);
229 mutex_unlock(&dev->lock);
235 static void em28xx_vm_open(struct vm_area_struct *vma)
237 struct em28xx_frame_t *f = vma->vm_private_data;
244 static void em28xx_vm_close(struct vm_area_struct *vma)
246 /* NOTE: buffers are not freed here */
247 struct em28xx_frame_t *f = vma->vm_private_data;
249 if (f->vma_use_count)
253 static struct vm_operations_struct em28xx_vm_ops = {
254 .open = em28xx_vm_open,
255 .close = em28xx_vm_close,
261 * return the current saturation, brightness or contrast, mute state
263 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
266 case V4L2_CID_AUDIO_MUTE:
267 ctrl->value = dev->mute;
269 case V4L2_CID_AUDIO_VOLUME:
270 ctrl->value = dev->volume;
279 * mute or set new saturation, brightness or contrast
281 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
284 case V4L2_CID_AUDIO_MUTE:
285 if (ctrl->value != dev->mute) {
286 dev->mute = ctrl->value;
287 return em28xx_audio_analog_set(dev);
290 case V4L2_CID_AUDIO_VOLUME:
291 dev->volume = ctrl->value;
292 return em28xx_audio_analog_set(dev);
299 * em28xx_stream_interrupt()
302 static int em28xx_stream_interrupt(struct em28xx *dev)
306 /* stop reading from the device */
308 dev->stream = STREAM_INTERRUPT;
309 rc = wait_event_timeout(dev->wait_stream,
310 (dev->stream == STREAM_OFF) ||
311 (dev->state & DEV_DISCONNECTED),
315 dev->state |= DEV_MISCONFIGURED;
316 em28xx_videodbg("device is misconfigured; close and "
317 "open /dev/video%d again\n",
318 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
326 static int check_dev(struct em28xx *dev)
328 if (dev->state & DEV_DISCONNECTED) {
329 em28xx_errdev("v4l2 ioctl: device not present\n");
333 if (dev->state & DEV_MISCONFIGURED) {
334 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
335 "close and open it again\n");
341 static void get_scale(struct em28xx *dev,
342 unsigned int width, unsigned int height,
343 unsigned int *hscale, unsigned int *vscale)
345 unsigned int maxw = norm_maxw(dev);
346 unsigned int maxh = norm_maxh(dev);
348 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
349 if (*hscale >= 0x4000)
352 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
353 if (*vscale >= 0x4000)
357 /* ------------------------------------------------------------------
358 IOCTL vidioc handling
359 ------------------------------------------------------------------*/
361 static int vidioc_g_fmt_cap(struct file *file, void *priv,
362 struct v4l2_format *f)
364 struct em28xx_fh *fh = priv;
365 struct em28xx *dev = fh->dev;
367 mutex_lock(&dev->lock);
369 f->fmt.pix.width = dev->width;
370 f->fmt.pix.height = dev->height;
371 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
372 f->fmt.pix.bytesperline = dev->bytesperline;
373 f->fmt.pix.sizeimage = dev->frame_size;
374 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
376 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
377 f->fmt.pix.field = dev->interlaced ?
378 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
380 mutex_unlock(&dev->lock);
384 static int vidioc_try_fmt_cap(struct file *file, void *priv,
385 struct v4l2_format *f)
387 struct em28xx_fh *fh = priv;
388 struct em28xx *dev = fh->dev;
389 int width = f->fmt.pix.width;
390 int height = f->fmt.pix.height;
391 unsigned int maxw = norm_maxw(dev);
392 unsigned int maxh = norm_maxh(dev);
393 unsigned int hscale, vscale;
395 /* width must even because of the YUYV format
396 height must be even because of interlacing */
409 mutex_lock(&dev->lock);
411 if (dev->is_em2800) {
412 /* the em2800 can only scale down to 50% */
413 if (height % (maxh / 2))
415 if (width % (maxw / 2))
417 /* according to empiatech support */
418 /* the MaxPacketSize is to small to support */
419 /* framesizes larger than 640x480 @ 30 fps */
420 /* or 640x576 @ 25 fps. As this would cut */
421 /* of a part of the image we prefer */
422 /* 360x576 or 360x480 for now */
423 if (width == maxw && height == maxh)
427 get_scale(dev, width, height, &hscale, &vscale);
429 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
430 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
432 f->fmt.pix.width = width;
433 f->fmt.pix.height = height;
434 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
435 f->fmt.pix.bytesperline = width * 2;
436 f->fmt.pix.sizeimage = width * 2 * height;
437 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
438 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
440 mutex_unlock(&dev->lock);
444 static int vidioc_s_fmt_cap(struct file *file, void *priv,
445 struct v4l2_format *f)
447 struct em28xx_fh *fh = priv;
448 struct em28xx *dev = fh->dev;
455 vidioc_try_fmt_cap(file, priv, f);
457 mutex_lock(&dev->lock);
459 for (i = 0; i < dev->num_frames; i++)
460 if (dev->frame[i].vma_use_count) {
461 em28xx_videodbg("VIDIOC_S_FMT failed. "
462 "Unmap the buffers first.\n");
467 /* stop io in case it is already in progress */
468 if (dev->stream == STREAM_ON) {
469 em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n");
470 rc = em28xx_stream_interrupt(dev);
475 em28xx_release_buffers(dev);
478 /* set new image size */
479 dev->width = f->fmt.pix.width;
480 dev->height = f->fmt.pix.height;
481 dev->frame_size = dev->width * dev->height * 2;
482 dev->field_size = dev->frame_size >> 1;
483 dev->bytesperline = dev->width * 2;
484 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
486 /* FIXME: This is really weird! Why capture is starting with
489 em28xx_uninit_isoc(dev);
490 em28xx_set_alternate(dev);
491 em28xx_capture_start(dev, 1);
492 em28xx_resolution_set(dev);
493 em28xx_init_isoc(dev);
497 mutex_unlock(&dev->lock);
501 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
503 struct em28xx_fh *fh = priv;
504 struct em28xx *dev = fh->dev;
505 struct v4l2_format f;
512 mutex_lock(&dev->lock);
514 mutex_unlock(&dev->lock);
516 /* Adjusts width/height, if needed */
517 f.fmt.pix.width = dev->width;
518 f.fmt.pix.height = dev->height;
519 vidioc_try_fmt_cap(file, priv, &f);
521 mutex_lock(&dev->lock);
523 /* set new image size */
524 dev->width = f.fmt.pix.width;
525 dev->height = f.fmt.pix.height;
526 dev->frame_size = dev->width * dev->height * 2;
527 dev->field_size = dev->frame_size >> 1;
528 dev->bytesperline = dev->width * 2;
529 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
531 em28xx_resolution_set(dev);
532 em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
534 mutex_unlock(&dev->lock);
538 static const char *iname[] = {
539 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
540 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
541 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
542 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
543 [EM28XX_VMUX_SVIDEO] = "S-Video",
544 [EM28XX_VMUX_TELEVISION] = "Television",
545 [EM28XX_VMUX_CABLE] = "Cable TV",
546 [EM28XX_VMUX_DVB] = "DVB",
547 [EM28XX_VMUX_DEBUG] = "for debug only",
550 static int vidioc_enum_input(struct file *file, void *priv,
551 struct v4l2_input *i)
553 struct em28xx_fh *fh = priv;
554 struct em28xx *dev = fh->dev;
558 if (n >= MAX_EM28XX_INPUT)
560 if (0 == INPUT(n)->type)
564 i->type = V4L2_INPUT_TYPE_CAMERA;
566 strcpy(i->name, iname[INPUT(n)->type]);
568 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
569 (EM28XX_VMUX_CABLE == INPUT(n)->type))
570 i->type = V4L2_INPUT_TYPE_TUNER;
572 i->std = dev->vdev->tvnorms;
577 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
579 struct em28xx_fh *fh = priv;
580 struct em28xx *dev = fh->dev;
587 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
589 struct em28xx_fh *fh = priv;
590 struct em28xx *dev = fh->dev;
597 if (i >= MAX_EM28XX_INPUT)
599 if (0 == INPUT(i)->type)
602 mutex_lock(&dev->lock);
606 mutex_unlock(&dev->lock);
610 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
612 struct em28xx_fh *fh = priv;
613 struct em28xx *dev = fh->dev;
614 unsigned int index = a->index;
619 index = dev->ctl_ainput;
622 strcpy(a->name, "Television");
624 strcpy(a->name, "Line In");
626 a->capability = V4L2_AUDCAP_STEREO;
632 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
634 struct em28xx_fh *fh = priv;
635 struct em28xx *dev = fh->dev;
637 if (a->index != dev->ctl_ainput)
643 static int vidioc_queryctrl(struct file *file, void *priv,
644 struct v4l2_queryctrl *qc)
646 struct em28xx_fh *fh = priv;
647 struct em28xx *dev = fh->dev;
656 memset(qc, 0, sizeof(*qc));
660 if (!dev->has_msp34xx) {
661 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
662 if (qc->id && qc->id == em28xx_qctrl[i].id) {
663 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
668 mutex_lock(&dev->lock);
669 em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
670 mutex_unlock(&dev->lock);
678 static int vidioc_g_ctrl(struct file *file, void *priv,
679 struct v4l2_control *ctrl)
681 struct em28xx_fh *fh = priv;
682 struct em28xx *dev = fh->dev;
688 mutex_lock(&dev->lock);
690 if (!dev->has_msp34xx)
691 rc = em28xx_get_ctrl(dev, ctrl);
696 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
700 mutex_unlock(&dev->lock);
704 static int vidioc_s_ctrl(struct file *file, void *priv,
705 struct v4l2_control *ctrl)
707 struct em28xx_fh *fh = priv;
708 struct em28xx *dev = fh->dev;
716 mutex_lock(&dev->lock);
718 if (dev->has_msp34xx)
719 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
722 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
723 if (ctrl->id == em28xx_qctrl[i].id) {
724 if (ctrl->value < em28xx_qctrl[i].minimum ||
725 ctrl->value > em28xx_qctrl[i].maximum) {
730 rc = em28xx_set_ctrl(dev, ctrl);
736 /* Control not found - try to send it to the attached devices */
738 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
742 mutex_unlock(&dev->lock);
746 static int vidioc_g_tuner(struct file *file, void *priv,
747 struct v4l2_tuner *t)
749 struct em28xx_fh *fh = priv;
750 struct em28xx *dev = fh->dev;
760 strcpy(t->name, "Tuner");
762 mutex_lock(&dev->lock);
764 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
766 mutex_unlock(&dev->lock);
770 static int vidioc_s_tuner(struct file *file, void *priv,
771 struct v4l2_tuner *t)
773 struct em28xx_fh *fh = priv;
774 struct em28xx *dev = fh->dev;
784 mutex_lock(&dev->lock);
786 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
788 mutex_unlock(&dev->lock);
792 static int vidioc_g_frequency(struct file *file, void *priv,
793 struct v4l2_frequency *f)
795 struct em28xx_fh *fh = priv;
796 struct em28xx *dev = fh->dev;
798 f->type = V4L2_TUNER_ANALOG_TV;
799 f->frequency = dev->ctl_freq;
804 static int vidioc_s_frequency(struct file *file, void *priv,
805 struct v4l2_frequency *f)
807 struct em28xx_fh *fh = priv;
808 struct em28xx *dev = fh->dev;
818 if (V4L2_TUNER_ANALOG_TV != f->type)
821 mutex_lock(&dev->lock);
823 dev->ctl_freq = f->frequency;
824 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
826 mutex_unlock(&dev->lock);
830 static int vidioc_cropcap(struct file *file, void *priv,
831 struct v4l2_cropcap *cc)
833 struct em28xx_fh *fh = priv;
834 struct em28xx *dev = fh->dev;
836 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
841 cc->bounds.width = dev->width;
842 cc->bounds.height = dev->height;
843 cc->defrect = cc->bounds;
844 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
845 cc->pixelaspect.denominator = 59;
850 static int vidioc_streamon(struct file *file, void *priv,
851 enum v4l2_buf_type type)
853 struct em28xx_fh *fh = priv;
854 struct em28xx *dev = fh->dev;
861 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
864 if (list_empty(&dev->inqueue))
867 mutex_lock(&dev->lock);
869 if (unlikely(res_get(fh) < 0)) {
870 mutex_unlock(&dev->lock);
874 dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
876 mutex_unlock(&dev->lock);
880 static int vidioc_streamoff(struct file *file, void *priv,
881 enum v4l2_buf_type type)
883 struct em28xx_fh *fh = priv;
884 struct em28xx *dev = fh->dev;
891 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
894 mutex_lock(&dev->lock);
896 if (dev->stream == STREAM_ON) {
897 em28xx_videodbg("VIDIOC_STREAMOFF: interrupting stream\n");
898 rc = em28xx_stream_interrupt(dev);
900 mutex_unlock(&dev->lock);
905 em28xx_empty_framequeues(dev);
907 mutex_unlock(&dev->lock);
911 static int vidioc_querycap(struct file *file, void *priv,
912 struct v4l2_capability *cap)
914 struct em28xx_fh *fh = priv;
915 struct em28xx *dev = fh->dev;
917 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
918 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
919 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
921 cap->version = EM28XX_VERSION_CODE;
924 V4L2_CAP_SLICED_VBI_CAPTURE |
925 V4L2_CAP_VIDEO_CAPTURE |
927 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
930 cap->capabilities |= V4L2_CAP_TUNER;
935 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
936 struct v4l2_fmtdesc *fmtd)
938 if (fmtd->index != 0)
941 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
942 strcpy(fmtd->description, "Packed YUY2");
943 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
944 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
949 /* Sliced VBI ioctls */
950 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
951 struct v4l2_format *f)
953 struct em28xx_fh *fh = priv;
954 struct em28xx *dev = fh->dev;
961 mutex_lock(&dev->lock);
963 f->fmt.sliced.service_set = 0;
965 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
967 if (f->fmt.sliced.service_set == 0)
970 mutex_unlock(&dev->lock);
974 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
975 struct v4l2_format *f)
977 struct em28xx_fh *fh = priv;
978 struct em28xx *dev = fh->dev;
985 mutex_lock(&dev->lock);
986 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
987 mutex_unlock(&dev->lock);
989 if (f->fmt.sliced.service_set == 0)
996 static int vidioc_reqbufs(struct file *file, void *priv,
997 struct v4l2_requestbuffers *rb)
999 struct em28xx_fh *fh = priv;
1000 struct em28xx *dev = fh->dev;
1004 rc = check_dev(dev);
1008 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1009 rb->memory != V4L2_MEMORY_MMAP)
1012 if (dev->io == IO_READ) {
1013 em28xx_videodbg("method is set to read;"
1014 " close and open the device again to"
1015 " choose the mmap I/O method\n");
1019 for (i = 0; i < dev->num_frames; i++)
1020 if (dev->frame[i].vma_use_count) {
1021 em28xx_videodbg("VIDIOC_REQBUFS failed; "
1022 "previous buffers are still mapped\n");
1026 mutex_lock(&dev->lock);
1028 if (dev->stream == STREAM_ON) {
1029 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1030 rc = em28xx_stream_interrupt(dev);
1032 mutex_unlock(&dev->lock);
1037 em28xx_empty_framequeues(dev);
1039 em28xx_release_buffers(dev);
1041 rb->count = em28xx_request_buffers(dev, rb->count);
1043 dev->frame_current = NULL;
1044 dev->io = rb->count ? IO_MMAP : IO_NONE;
1046 mutex_unlock(&dev->lock);
1050 static int vidioc_querybuf(struct file *file, void *priv,
1051 struct v4l2_buffer *b)
1053 struct em28xx_fh *fh = priv;
1054 struct em28xx *dev = fh->dev;
1057 rc = check_dev(dev);
1061 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1062 b->index >= dev->num_frames || dev->io != IO_MMAP)
1065 mutex_lock(&dev->lock);
1067 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1069 if (dev->frame[b->index].vma_use_count)
1070 b->flags |= V4L2_BUF_FLAG_MAPPED;
1072 if (dev->frame[b->index].state == F_DONE)
1073 b->flags |= V4L2_BUF_FLAG_DONE;
1074 else if (dev->frame[b->index].state != F_UNUSED)
1075 b->flags |= V4L2_BUF_FLAG_QUEUED;
1077 mutex_unlock(&dev->lock);
1081 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1083 struct em28xx_fh *fh = priv;
1084 struct em28xx *dev = fh->dev;
1085 unsigned long lock_flags;
1088 rc = check_dev(dev);
1092 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP ||
1093 b->index >= dev->num_frames)
1096 if (dev->frame[b->index].state != F_UNUSED)
1099 dev->frame[b->index].state = F_QUEUED;
1101 /* add frame to fifo */
1102 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1103 list_add_tail(&dev->frame[b->index].frame, &dev->inqueue);
1104 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1109 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1111 struct em28xx_fh *fh = priv;
1112 struct em28xx *dev = fh->dev;
1114 struct em28xx_frame_t *f;
1115 unsigned long lock_flags;
1117 rc = check_dev(dev);
1121 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
1124 if (list_empty(&dev->outqueue)) {
1125 if (dev->stream == STREAM_OFF)
1128 if (file->f_flags & O_NONBLOCK)
1131 rc = wait_event_interruptible(dev->wait_frame,
1132 (!list_empty(&dev->outqueue)) ||
1133 (dev->state & DEV_DISCONNECTED));
1137 if (dev->state & DEV_DISCONNECTED)
1141 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1142 f = list_entry(dev->outqueue.next, struct em28xx_frame_t, frame);
1143 list_del(dev->outqueue.next);
1144 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1146 f->state = F_UNUSED;
1147 memcpy(b, &f->buf, sizeof(*b));
1149 if (f->vma_use_count)
1150 b->flags |= V4L2_BUF_FLAG_MAPPED;
1156 * em28xx_v4l2_open()
1157 * inits the device and starts isoc transfer
1159 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1161 int minor = iminor(inode);
1163 struct em28xx *h,*dev = NULL;
1164 struct em28xx_fh *fh;
1166 list_for_each_entry(h, &em28xx_devlist, devlist) {
1167 if (h->vdev->minor == minor) {
1169 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1171 if (h->vbi_dev->minor == minor) {
1173 dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1179 em28xx_videodbg("open minor=%d type=%s users=%d\n",
1180 minor,v4l2_type_names[dev->type],dev->users);
1182 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1185 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1188 mutex_lock(&dev->lock);
1190 filp->private_data = fh;
1192 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1193 em28xx_set_alternate(dev);
1195 dev->width = norm_maxw(dev);
1196 dev->height = norm_maxh(dev);
1197 dev->frame_size = dev->width * dev->height * 2;
1198 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1199 dev->bytesperline = dev->width * 2;
1203 em28xx_capture_start(dev, 1);
1204 em28xx_resolution_set(dev);
1207 /* start the transfer */
1208 errCode = em28xx_init_isoc(dev);
1212 em28xx_empty_framequeues(dev);
1218 mutex_unlock(&dev->lock);
1223 * em28xx_realease_resources()
1224 * unregisters the v4l2,i2c and usb devices
1225 * called when the device gets disconected or at module unload
1227 static void em28xx_release_resources(struct em28xx *dev)
1230 /*FIXME: I2C IR should be disconnected */
1232 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1233 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1234 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1235 list_del(&dev->devlist);
1236 video_unregister_device(dev->vdev);
1237 video_unregister_device(dev->vbi_dev);
1238 em28xx_i2c_unregister(dev);
1239 usb_put_dev(dev->udev);
1242 /* Mark device as unused */
1243 em28xx_devused&=~(1<<dev->devno);
1247 * em28xx_v4l2_close()
1248 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
1250 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1252 struct em28xx_fh *fh = filp->private_data;
1253 struct em28xx *dev = fh->dev;
1256 em28xx_videodbg("users=%d\n", dev->users);
1262 mutex_lock(&dev->lock);
1264 if (dev->users == 1) {
1265 em28xx_uninit_isoc(dev);
1266 em28xx_release_buffers(dev);
1269 /* the device is already disconnect,
1270 free the remaining resources */
1271 if (dev->state & DEV_DISCONNECTED) {
1272 em28xx_release_resources(dev);
1273 mutex_unlock(&dev->lock);
1278 /* set alternate 0 */
1280 em28xx_videodbg("setting alternate 0\n");
1281 errCode = usb_set_interface(dev->udev, 0, 0);
1283 em28xx_errdev("cannot change alternate number to "
1284 "0 (error=%i)\n", errCode);
1289 wake_up_interruptible_nr(&dev->open, 1);
1290 mutex_unlock(&dev->lock);
1295 * em28xx_v4l2_read()
1296 * will allocate buffers when called for the first time
1299 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
1302 struct em28xx_frame_t *f, *i;
1303 unsigned long lock_flags;
1305 struct em28xx_fh *fh = filp->private_data;
1306 struct em28xx *dev = fh->dev;
1308 /* FIXME: read() is not prepared to allow changing the video
1309 resolution while streaming. Seems a bug at em28xx_set_fmt
1312 if (unlikely(res_get(fh) < 0))
1315 mutex_lock(&dev->lock);
1317 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1318 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
1320 if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1321 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
1322 em28xx_videodbg("not supported yet! ...\n");
1323 if (copy_to_user(buf, "", 1)) {
1324 mutex_unlock(&dev->lock);
1327 mutex_unlock(&dev->lock);
1330 if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
1331 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
1332 em28xx_videodbg("not supported yet! ...\n");
1333 if (copy_to_user(buf, "", 1)) {
1334 mutex_unlock(&dev->lock);
1337 mutex_unlock(&dev->lock);
1341 if (dev->state & DEV_DISCONNECTED) {
1342 em28xx_videodbg("device not present\n");
1343 mutex_unlock(&dev->lock);
1347 if (dev->state & DEV_MISCONFIGURED) {
1348 em28xx_videodbg("device misconfigured; close and open it again\n");
1349 mutex_unlock(&dev->lock);
1353 if (dev->io == IO_MMAP) {
1354 em28xx_videodbg ("IO method is set to mmap; close and open"
1355 " the device again to choose the read method\n");
1356 mutex_unlock(&dev->lock);
1360 if (dev->io == IO_NONE) {
1361 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
1362 em28xx_errdev("read failed, not enough memory\n");
1363 mutex_unlock(&dev->lock);
1367 dev->stream = STREAM_ON;
1368 em28xx_queue_unusedframes(dev);
1372 mutex_unlock(&dev->lock);
1376 if (list_empty(&dev->outqueue)) {
1377 if (filp->f_flags & O_NONBLOCK) {
1378 mutex_unlock(&dev->lock);
1381 ret = wait_event_interruptible
1383 (!list_empty(&dev->outqueue)) ||
1384 (dev->state & DEV_DISCONNECTED));
1386 mutex_unlock(&dev->lock);
1389 if (dev->state & DEV_DISCONNECTED) {
1390 mutex_unlock(&dev->lock);
1393 dev->video_bytesread = 0;
1396 f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
1398 em28xx_queue_unusedframes(dev);
1400 if (count > f->buf.length)
1401 count = f->buf.length;
1403 if ((dev->video_bytesread + count) > dev->frame_size)
1404 count = dev->frame_size - dev->video_bytesread;
1406 if (copy_to_user(buf, f->bufmem+dev->video_bytesread, count)) {
1407 em28xx_err("Error while copying to user\n");
1410 dev->video_bytesread += count;
1412 if (dev->video_bytesread == dev->frame_size) {
1413 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1414 list_for_each_entry(i, &dev->outqueue, frame)
1415 i->state = F_UNUSED;
1416 INIT_LIST_HEAD(&dev->outqueue);
1417 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1419 em28xx_queue_unusedframes(dev);
1420 dev->video_bytesread = 0;
1425 mutex_unlock(&dev->lock);
1431 * em28xx_v4l2_poll()
1432 * will allocate buffers when called for the first time
1434 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1436 unsigned int mask = 0;
1437 struct em28xx_fh *fh = filp->private_data;
1438 struct em28xx *dev = fh->dev;
1440 if (unlikely(res_get(fh) < 0))
1443 mutex_lock(&dev->lock);
1445 if (dev->state & DEV_DISCONNECTED) {
1446 em28xx_videodbg("device not present\n");
1447 } else if (dev->state & DEV_MISCONFIGURED) {
1448 em28xx_videodbg("device is misconfigured; close and open it again\n");
1450 if (dev->io == IO_NONE) {
1451 if (!em28xx_request_buffers
1452 (dev, EM28XX_NUM_READ_FRAMES)) {
1454 ("poll() failed, not enough memory\n");
1457 dev->stream = STREAM_ON;
1461 if (dev->io == IO_READ) {
1462 em28xx_queue_unusedframes(dev);
1463 poll_wait(filp, &dev->wait_frame, wait);
1465 if (!list_empty(&dev->outqueue))
1466 mask |= POLLIN | POLLRDNORM;
1468 mutex_unlock(&dev->lock);
1474 mutex_unlock(&dev->lock);
1479 * em28xx_v4l2_mmap()
1481 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1483 struct em28xx_fh *fh = filp->private_data;
1484 struct em28xx *dev = fh->dev;
1485 unsigned long size = vma->vm_end - vma->vm_start;
1486 unsigned long start = vma->vm_start;
1490 if (unlikely(res_get(fh) < 0))
1493 mutex_lock(&dev->lock);
1495 if (dev->state & DEV_DISCONNECTED) {
1496 em28xx_videodbg("mmap: device not present\n");
1497 mutex_unlock(&dev->lock);
1501 if (dev->state & DEV_MISCONFIGURED) {
1502 em28xx_videodbg ("mmap: Device is misconfigured; close and "
1504 mutex_unlock(&dev->lock);
1508 if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE)) {
1509 mutex_unlock(&dev->lock);
1513 if (size > PAGE_ALIGN(dev->frame[0].buf.length))
1514 size = PAGE_ALIGN(dev->frame[0].buf.length);
1516 for (i = 0; i < dev->num_frames; i++) {
1517 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
1520 if (i == dev->num_frames) {
1521 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
1522 mutex_unlock(&dev->lock);
1526 /* VM_IO is eventually going to replace PageReserved altogether */
1527 vma->vm_flags |= VM_IO;
1528 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
1530 pos = dev->frame[i].bufmem;
1531 while (size > 0) { /* size is page-aligned */
1532 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1533 em28xx_videodbg("mmap: vm_insert_page failed\n");
1534 mutex_unlock(&dev->lock);
1542 vma->vm_ops = &em28xx_vm_ops;
1543 vma->vm_private_data = &dev->frame[i];
1545 em28xx_vm_open(vma);
1546 mutex_unlock(&dev->lock);
1550 static const struct file_operations em28xx_v4l_fops = {
1551 .owner = THIS_MODULE,
1552 .open = em28xx_v4l2_open,
1553 .release = em28xx_v4l2_close,
1554 .read = em28xx_v4l2_read,
1555 .poll = em28xx_v4l2_poll,
1556 .mmap = em28xx_v4l2_mmap,
1557 .ioctl = video_ioctl2,
1558 .llseek = no_llseek,
1559 .compat_ioctl = v4l_compat_ioctl32,
1562 static const struct video_device em28xx_video_template = {
1563 .fops = &em28xx_v4l_fops,
1564 .release = video_device_release,
1567 .vidioc_querycap = vidioc_querycap,
1568 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1569 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1570 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1571 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1572 .vidioc_g_audio = vidioc_g_audio,
1573 .vidioc_s_audio = vidioc_s_audio,
1574 .vidioc_cropcap = vidioc_cropcap,
1576 .vidioc_g_fmt_vbi_capture = vidioc_g_fmt_vbi_capture,
1577 .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1578 .vidioc_s_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1580 .vidioc_reqbufs = vidioc_reqbufs,
1581 .vidioc_querybuf = vidioc_querybuf,
1582 .vidioc_qbuf = vidioc_qbuf,
1583 .vidioc_dqbuf = vidioc_dqbuf,
1584 .vidioc_s_std = vidioc_s_std,
1585 .vidioc_enum_input = vidioc_enum_input,
1586 .vidioc_g_input = vidioc_g_input,
1587 .vidioc_s_input = vidioc_s_input,
1588 .vidioc_queryctrl = vidioc_queryctrl,
1589 .vidioc_g_ctrl = vidioc_g_ctrl,
1590 .vidioc_s_ctrl = vidioc_s_ctrl,
1591 .vidioc_streamon = vidioc_streamon,
1592 .vidioc_streamoff = vidioc_streamoff,
1593 .vidioc_g_tuner = vidioc_g_tuner,
1594 .vidioc_s_tuner = vidioc_s_tuner,
1595 .vidioc_g_frequency = vidioc_g_frequency,
1596 .vidioc_s_frequency = vidioc_s_frequency,
1598 .tvnorms = V4L2_STD_ALL,
1599 .current_norm = V4L2_STD_PAL,
1603 /******************************** usb interface *****************************************/
1607 * allocates and inits the device structs, registers i2c bus and v4l device
1609 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1612 struct em28xx *dev = *devhandle;
1613 int retval = -ENOMEM;
1615 unsigned int maxh, maxw;
1618 mutex_init(&dev->lock);
1619 spin_lock_init(&dev->queue_lock);
1620 init_waitqueue_head(&dev->open);
1621 init_waitqueue_head(&dev->wait_frame);
1622 init_waitqueue_head(&dev->wait_stream);
1624 dev->em28xx_write_regs = em28xx_write_regs;
1625 dev->em28xx_read_reg = em28xx_read_reg;
1626 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1627 dev->em28xx_write_regs_req = em28xx_write_regs_req;
1628 dev->em28xx_read_reg_req = em28xx_read_reg_req;
1629 dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
1631 em28xx_pre_card_setup(dev);
1633 errCode = em28xx_config(dev);
1635 em28xx_errdev("error configuring device\n");
1636 em28xx_devused &= ~(1<<dev->devno);
1641 /* register i2c bus */
1642 em28xx_i2c_register(dev);
1644 /* Do board specific init and eeprom reading */
1645 em28xx_card_setup(dev);
1647 /* configure the device */
1648 em28xx_config_i2c(dev);
1650 /* set default norm */
1651 dev->norm = em28xx_video_template.current_norm;
1653 maxw = norm_maxw(dev);
1654 maxh = norm_maxh(dev);
1656 /* set default image size */
1659 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1660 dev->field_size = dev->width * dev->height;
1662 dev->interlaced ? dev->field_size << 1 : dev->field_size;
1663 dev->bytesperline = dev->width * 2;
1668 errCode = em28xx_config(dev);
1670 /* allocate and fill video video_device struct */
1671 dev->vdev = video_device_alloc();
1672 if (NULL == dev->vdev) {
1673 em28xx_errdev("cannot allocate video_device.\n");
1674 em28xx_devused&=~(1<<dev->devno);
1678 memcpy(dev->vdev, &em28xx_video_template,
1679 sizeof(em28xx_video_template));
1680 dev->vdev->type = VID_TYPE_CAPTURE;
1682 dev->vdev->type |= VID_TYPE_TUNER;
1683 dev->vdev->dev = &dev->udev->dev;
1684 snprintf(dev->vdev->name, sizeof(dev->vbi_dev->name),
1685 "%s#%d %s", "em28xx", dev->devno, "video");
1687 /* Allocate and fill vbi video_device struct */
1688 dev->vbi_dev = video_device_alloc();
1689 if (NULL == dev->vbi_dev) {
1690 em28xx_errdev("cannot allocate video_device.\n");
1692 em28xx_devused&=~(1<<dev->devno);
1696 memcpy(dev->vbi_dev, &em28xx_video_template,
1697 sizeof(em28xx_video_template));
1698 dev->vbi_dev->type = VFL_TYPE_VBI;
1699 dev->vbi_dev->dev = &dev->udev->dev;
1700 snprintf(dev->vbi_dev->name, sizeof(dev->vbi_dev->name),
1701 "%s#%d %s", "em28xx", dev->devno, "vbi");
1703 list_add_tail(&dev->devlist,&em28xx_devlist);
1705 if (dev->has_msp34xx) {
1706 /* Send a reset to other chips via gpio */
1707 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1709 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1715 /* register v4l2 video video_device */
1716 if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1717 video_nr[dev->devno]))) {
1718 em28xx_errdev("unable to register video device (error=%i).\n",
1720 mutex_unlock(&dev->lock);
1721 list_del(&dev->devlist);
1722 video_device_release(dev->vdev);
1723 em28xx_devused&=~(1<<dev->devno);
1728 /* register v4l2 vbi video_device */
1729 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1730 vbi_nr[dev->devno]) < 0) {
1731 printk("unable to register vbi device\n");
1732 mutex_unlock(&dev->lock);
1733 list_del(&dev->devlist);
1734 video_device_release(dev->vbi_dev);
1735 video_device_release(dev->vdev);
1736 em28xx_devused&=~(1<<dev->devno);
1741 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1742 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1743 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1749 * em28xx_usb_probe()
1750 * checks for supported devices
1752 static int em28xx_usb_probe(struct usb_interface *interface,
1753 const struct usb_device_id *id)
1755 const struct usb_endpoint_descriptor *endpoint;
1756 struct usb_device *udev;
1757 struct usb_interface *uif;
1758 struct em28xx *dev = NULL;
1759 int retval = -ENODEV;
1762 udev = usb_get_dev(interface_to_usbdev(interface));
1763 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1765 /* Check to see next free device and mark as used */
1766 nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
1767 em28xx_devused|=1<<nr;
1769 /* Don't register audio interfaces */
1770 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
1771 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
1772 udev->descriptor.idVendor,udev->descriptor.idProduct,
1774 interface->altsetting[0].desc.bInterfaceClass);
1776 em28xx_devused&=~(1<<nr);
1780 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
1781 udev->descriptor.idVendor,udev->descriptor.idProduct,
1783 interface->altsetting[0].desc.bInterfaceClass);
1785 endpoint = &interface->cur_altsetting->endpoint[1].desc;
1787 /* check if the device has the iso in endpoint at the correct place */
1788 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1789 USB_ENDPOINT_XFER_ISOC) {
1790 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1791 em28xx_devused&=~(1<<nr);
1794 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1795 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1796 em28xx_devused&=~(1<<nr);
1800 if (nr >= EM28XX_MAXBOARDS) {
1801 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
1802 em28xx_devused&=~(1<<nr);
1806 /* allocate memory for our device state and initialize it */
1807 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1809 em28xx_err(DRIVER_NAME ": out of memory!\n");
1810 em28xx_devused&=~(1<<nr);
1814 snprintf(dev->name, 29, "em28xx #%d", nr);
1816 dev->model = id->driver_info;
1818 /* compute alternate max packet sizes */
1819 uif = udev->actconfig->interface[0];
1821 dev->num_alt=uif->num_altsetting;
1822 em28xx_info("Alternate settings: %i\n",dev->num_alt);
1823 // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1824 dev->alt_max_pkt_size = kmalloc(32*
1825 dev->num_alt,GFP_KERNEL);
1826 if (dev->alt_max_pkt_size == NULL) {
1827 em28xx_errdev("out of memory!\n");
1828 em28xx_devused&=~(1<<nr);
1833 for (i = 0; i < dev->num_alt ; i++) {
1834 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1836 dev->alt_max_pkt_size[i] =
1837 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1838 em28xx_info("Alternate setting %i, max size= %i\n",i,
1839 dev->alt_max_pkt_size[i]);
1842 if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
1843 dev->model = card[nr];
1845 /* allocate device struct */
1846 retval = em28xx_init_dev(&dev, udev, nr);
1850 em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
1852 /* save our data pointer in this interface device */
1853 usb_set_intfdata(interface, dev);
1858 * em28xx_usb_disconnect()
1859 * called when the device gets diconencted
1860 * video device will be unregistered on v4l2_close in case it is still open
1862 static void em28xx_usb_disconnect(struct usb_interface *interface)
1866 dev = usb_get_intfdata(interface);
1867 usb_set_intfdata(interface, NULL);
1872 em28xx_info("disconnecting %s\n", dev->vdev->name);
1874 /* wait until all current v4l2 io is finished then deallocate resources */
1875 mutex_lock(&dev->lock);
1877 wake_up_interruptible_all(&dev->open);
1881 ("device /dev/video%d is open! Deregistration and memory "
1882 "deallocation are deferred on close.\n",
1883 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
1885 dev->state |= DEV_MISCONFIGURED;
1886 em28xx_uninit_isoc(dev);
1887 dev->state |= DEV_DISCONNECTED;
1888 wake_up_interruptible(&dev->wait_frame);
1889 wake_up_interruptible(&dev->wait_stream);
1891 dev->state |= DEV_DISCONNECTED;
1892 em28xx_release_resources(dev);
1896 mutex_unlock(&dev->lock);
1899 kfree(dev->alt_max_pkt_size);
1905 static struct usb_driver em28xx_usb_driver = {
1907 .probe = em28xx_usb_probe,
1908 .disconnect = em28xx_usb_disconnect,
1909 .id_table = em28xx_id_table,
1912 static int __init em28xx_module_init(void)
1916 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1917 (EM28XX_VERSION_CODE >> 16) & 0xff,
1918 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
1920 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1921 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1924 /* register this driver with the USB subsystem */
1925 result = usb_register(&em28xx_usb_driver);
1927 em28xx_err(DRIVER_NAME
1928 " usb_register failed. Error number %d.\n", result);
1933 static void __exit em28xx_module_exit(void)
1935 /* deregister this driver with the USB subsystem */
1936 usb_deregister(&em28xx_usb_driver);
1939 module_init(em28xx_module_init);
1940 module_exit(em28xx_module_exit);