2 * USB USBVISION Video device driver 0.9.10
6 * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
8 * This module is part of usbvision driver project.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * Let's call the version 0.... until compression decoding is completely
23 * This driver is written by Jose Ignacio Gijon and Joerg Heckenbach.
24 * It was based on USB CPiA driver written by Peter Pregler,
25 * Scott J. Bertin and Johannes Erdfelt
26 * Ideas are taken from bttv driver by Ralph Metzler, Marcus Metzler &
27 * Gerd Knorr and zoran 36120/36125 driver by Pauline Middelink
28 * Updates to driver completed by Dwaine P. Garden
32 * - use submit_urb for all setup packets
33 * - Fix memory settings for nt1004. It is 4 times as big as the
35 * - Add audio on endpoint 3 for nt1004 chip.
36 * Seems impossible, needs a codec interface. Which one?
37 * - Clean up the driver.
38 * - optimization for performance.
39 * - Add Videotext capability (VBI). Working on it.....
40 * - Check audio for other devices
44 #include <linux/kernel.h>
45 #include <linux/list.h>
46 #include <linux/timer.h>
47 #include <linux/slab.h>
49 #include <linux/highmem.h>
50 #include <linux/vmalloc.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/spinlock.h>
55 #include <linux/videodev2.h>
56 #include <linux/i2c.h>
58 #include <media/i2c/saa7115.h>
59 #include <media/v4l2-common.h>
60 #include <media/v4l2-ioctl.h>
61 #include <media/v4l2-event.h>
62 #include <media/tuner.h>
64 #include <linux/workqueue.h>
66 #include "usbvision.h"
67 #include "usbvision-cards.h"
69 #define DRIVER_AUTHOR \
70 "Joerg Heckenbach <joerg@heckenbach-aw.de>, " \
71 "Dwaine Garden <DwaineGarden@rogers.com>"
72 #define DRIVER_NAME "usbvision"
73 #define DRIVER_ALIAS "USBVision"
74 #define DRIVER_DESC "USBVision USB Video Device Driver for Linux"
75 #define USBVISION_VERSION_STRING "0.9.11"
77 #define ENABLE_HEXDUMP 0 /* Enable if you need it */
80 #ifdef USBVISION_DEBUG
81 #define PDEBUG(level, fmt, args...) { \
82 if (video_debug & (level)) \
83 printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
84 __func__, __LINE__ , ## args); \
87 #define PDEBUG(level, fmt, args...) do {} while (0)
90 #define DBG_IO (1 << 1)
91 #define DBG_PROBE (1 << 2)
92 #define DBG_MMAP (1 << 3)
94 /* String operations */
95 #define rmspace(str) while (*str == ' ') str++;
96 #define goto2next(str) while (*str != ' ') str++; while (*str == ' ') str++;
99 /* sequential number of usbvision device */
100 static int usbvision_nr;
102 static struct usbvision_v4l2_format_st usbvision_v4l2_format[] = {
103 { 1, 1, 8, V4L2_PIX_FMT_GREY , "GREY" },
104 { 1, 2, 16, V4L2_PIX_FMT_RGB565 , "RGB565" },
105 { 1, 3, 24, V4L2_PIX_FMT_RGB24 , "RGB24" },
106 { 1, 4, 32, V4L2_PIX_FMT_RGB32 , "RGB32" },
107 { 1, 2, 16, V4L2_PIX_FMT_RGB555 , "RGB555" },
108 { 1, 2, 16, V4L2_PIX_FMT_YUYV , "YUV422" },
109 { 1, 2, 12, V4L2_PIX_FMT_YVU420 , "YUV420P" }, /* 1.5 ! */
110 { 1, 2, 16, V4L2_PIX_FMT_YUV422P , "YUV422P" }
113 /* Function prototypes */
114 static void usbvision_release(struct usb_usbvision *usbvision);
116 /* Default initialization of device driver parameters */
117 /* Set the default format for ISOC endpoint */
118 static int isoc_mode = ISOC_MODE_COMPRESS;
119 /* Set the default Debug Mode of the device driver */
120 static int video_debug;
121 /* Sequential Number of Video Device */
122 static int video_nr = -1;
123 /* Sequential Number of Radio Device */
124 static int radio_nr = -1;
126 /* Grab parameters for the device driver */
128 /* Showing parameters under SYSFS */
129 module_param(isoc_mode, int, 0444);
130 module_param(video_debug, int, 0444);
131 module_param(video_nr, int, 0444);
132 module_param(radio_nr, int, 0444);
134 MODULE_PARM_DESC(isoc_mode, " Set the default format for ISOC endpoint. Default: 0x60 (Compression On)");
135 MODULE_PARM_DESC(video_debug, " Set the default Debug Mode of the device driver. Default: 0 (Off)");
136 MODULE_PARM_DESC(video_nr, "Set video device number (/dev/videoX). Default: -1 (autodetect)");
137 MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX). Default: -1 (autodetect)");
141 MODULE_AUTHOR(DRIVER_AUTHOR);
142 MODULE_DESCRIPTION(DRIVER_DESC);
143 MODULE_LICENSE("GPL");
144 MODULE_VERSION(USBVISION_VERSION_STRING);
145 MODULE_ALIAS(DRIVER_ALIAS);
148 /*****************************************************************************/
149 /* SYSFS Code - Copied from the stv680.c usb module. */
150 /* Device information is located at /sys/class/video4linux/video0 */
151 /* Device parameters information is located at /sys/module/usbvision */
152 /* Device USB Information is located at */
153 /* /sys/bus/usb/drivers/USBVision Video Grabber */
154 /*****************************************************************************/
156 #define YES_NO(x) ((x) ? "Yes" : "No")
158 static inline struct usb_usbvision *cd_to_usbvision(struct device *cd)
160 struct video_device *vdev = to_video_device(cd);
161 return video_get_drvdata(vdev);
164 static ssize_t show_version(struct device *cd,
165 struct device_attribute *attr, char *buf)
167 return sprintf(buf, "%s\n", USBVISION_VERSION_STRING);
169 static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
171 static ssize_t show_model(struct device *cd,
172 struct device_attribute *attr, char *buf)
174 struct video_device *vdev = to_video_device(cd);
175 struct usb_usbvision *usbvision = video_get_drvdata(vdev);
176 return sprintf(buf, "%s\n",
177 usbvision_device_data[usbvision->dev_model].model_string);
179 static DEVICE_ATTR(model, S_IRUGO, show_model, NULL);
181 static ssize_t show_hue(struct device *cd,
182 struct device_attribute *attr, char *buf)
184 struct video_device *vdev = to_video_device(cd);
185 struct usb_usbvision *usbvision = video_get_drvdata(vdev);
186 s32 val = v4l2_ctrl_g_ctrl(v4l2_ctrl_find(&usbvision->hdl,
189 return sprintf(buf, "%d\n", val);
191 static DEVICE_ATTR(hue, S_IRUGO, show_hue, NULL);
193 static ssize_t show_contrast(struct device *cd,
194 struct device_attribute *attr, char *buf)
196 struct video_device *vdev = to_video_device(cd);
197 struct usb_usbvision *usbvision = video_get_drvdata(vdev);
198 s32 val = v4l2_ctrl_g_ctrl(v4l2_ctrl_find(&usbvision->hdl,
201 return sprintf(buf, "%d\n", val);
203 static DEVICE_ATTR(contrast, S_IRUGO, show_contrast, NULL);
205 static ssize_t show_brightness(struct device *cd,
206 struct device_attribute *attr, char *buf)
208 struct video_device *vdev = to_video_device(cd);
209 struct usb_usbvision *usbvision = video_get_drvdata(vdev);
210 s32 val = v4l2_ctrl_g_ctrl(v4l2_ctrl_find(&usbvision->hdl,
211 V4L2_CID_BRIGHTNESS));
213 return sprintf(buf, "%d\n", val);
215 static DEVICE_ATTR(brightness, S_IRUGO, show_brightness, NULL);
217 static ssize_t show_saturation(struct device *cd,
218 struct device_attribute *attr, char *buf)
220 struct video_device *vdev = to_video_device(cd);
221 struct usb_usbvision *usbvision = video_get_drvdata(vdev);
222 s32 val = v4l2_ctrl_g_ctrl(v4l2_ctrl_find(&usbvision->hdl,
223 V4L2_CID_SATURATION));
225 return sprintf(buf, "%d\n", val);
227 static DEVICE_ATTR(saturation, S_IRUGO, show_saturation, NULL);
229 static ssize_t show_streaming(struct device *cd,
230 struct device_attribute *attr, char *buf)
232 struct video_device *vdev = to_video_device(cd);
233 struct usb_usbvision *usbvision = video_get_drvdata(vdev);
234 return sprintf(buf, "%s\n",
235 YES_NO(usbvision->streaming == stream_on ? 1 : 0));
237 static DEVICE_ATTR(streaming, S_IRUGO, show_streaming, NULL);
239 static ssize_t show_compression(struct device *cd,
240 struct device_attribute *attr, char *buf)
242 struct video_device *vdev = to_video_device(cd);
243 struct usb_usbvision *usbvision = video_get_drvdata(vdev);
244 return sprintf(buf, "%s\n",
245 YES_NO(usbvision->isoc_mode == ISOC_MODE_COMPRESS));
247 static DEVICE_ATTR(compression, S_IRUGO, show_compression, NULL);
249 static ssize_t show_device_bridge(struct device *cd,
250 struct device_attribute *attr, char *buf)
252 struct video_device *vdev = to_video_device(cd);
253 struct usb_usbvision *usbvision = video_get_drvdata(vdev);
254 return sprintf(buf, "%d\n", usbvision->bridge_type);
256 static DEVICE_ATTR(bridge, S_IRUGO, show_device_bridge, NULL);
258 static void usbvision_create_sysfs(struct video_device *vdev)
265 res = device_create_file(&vdev->dev, &dev_attr_version);
268 res = device_create_file(&vdev->dev, &dev_attr_model);
271 res = device_create_file(&vdev->dev, &dev_attr_hue);
274 res = device_create_file(&vdev->dev, &dev_attr_contrast);
277 res = device_create_file(&vdev->dev, &dev_attr_brightness);
280 res = device_create_file(&vdev->dev, &dev_attr_saturation);
283 res = device_create_file(&vdev->dev, &dev_attr_streaming);
286 res = device_create_file(&vdev->dev, &dev_attr_compression);
289 res = device_create_file(&vdev->dev, &dev_attr_bridge);
294 dev_err(&vdev->dev, "%s error: %d\n", __func__, res);
297 static void usbvision_remove_sysfs(struct video_device *vdev)
300 device_remove_file(&vdev->dev, &dev_attr_version);
301 device_remove_file(&vdev->dev, &dev_attr_model);
302 device_remove_file(&vdev->dev, &dev_attr_hue);
303 device_remove_file(&vdev->dev, &dev_attr_contrast);
304 device_remove_file(&vdev->dev, &dev_attr_brightness);
305 device_remove_file(&vdev->dev, &dev_attr_saturation);
306 device_remove_file(&vdev->dev, &dev_attr_streaming);
307 device_remove_file(&vdev->dev, &dev_attr_compression);
308 device_remove_file(&vdev->dev, &dev_attr_bridge);
315 * This is part of Video 4 Linux API. The driver can be opened by one
316 * client only (checks internal counter 'usbvision->user'). The procedure
317 * then allocates buffers needed for video processing.
320 static int usbvision_v4l2_open(struct file *file)
322 struct usb_usbvision *usbvision = video_drvdata(file);
325 PDEBUG(DBG_IO, "open");
327 if (mutex_lock_interruptible(&usbvision->v4l2_lock))
330 if (usbvision->remove_pending) {
334 if (usbvision->user) {
337 err_code = v4l2_fh_open(file);
341 /* Allocate memory for the scratch ring buffer */
342 err_code = usbvision_scratch_alloc(usbvision);
343 if (isoc_mode == ISOC_MODE_COMPRESS) {
344 /* Allocate intermediate decompression buffers
346 err_code = usbvision_decompress_alloc(usbvision);
349 /* Deallocate all buffers if trouble */
350 usbvision_scratch_free(usbvision);
351 usbvision_decompress_free(usbvision);
355 /* If so far no errors then we shall start the camera */
357 /* Send init sequence only once, it's large! */
358 if (!usbvision->initialized) {
360 setup_ok = usbvision_setup(usbvision, isoc_mode);
362 usbvision->initialized = 1;
368 usbvision_begin_streaming(usbvision);
369 err_code = usbvision_init_isoc(usbvision);
370 /* device must be initialized before isoc transfer */
371 usbvision_muxsel(usbvision, 0);
374 usbvision_empty_framequeues(usbvision);
380 mutex_unlock(&usbvision->v4l2_lock);
382 PDEBUG(DBG_IO, "success");
387 * usbvision_v4l2_close()
389 * This is part of Video 4 Linux API. The procedure
390 * stops streaming and deallocates all buffers that were earlier
391 * allocated in usbvision_v4l2_open().
394 static int usbvision_v4l2_close(struct file *file)
396 struct usb_usbvision *usbvision = video_drvdata(file);
399 PDEBUG(DBG_IO, "close");
401 mutex_lock(&usbvision->v4l2_lock);
402 usbvision_audio_off(usbvision);
403 usbvision_restart_isoc(usbvision);
404 usbvision_stop_isoc(usbvision);
406 usbvision_decompress_free(usbvision);
407 usbvision_frames_free(usbvision);
408 usbvision_empty_framequeues(usbvision);
409 usbvision_scratch_free(usbvision);
412 r = usbvision->remove_pending;
413 mutex_unlock(&usbvision->v4l2_lock);
416 printk(KERN_INFO "%s: Final disconnect\n", __func__);
417 usbvision_release(usbvision);
421 PDEBUG(DBG_IO, "success");
422 return v4l2_fh_release(file);
429 * This is part of Video 4 Linux API. The procedure handles ioctl() calls.
432 #ifdef CONFIG_VIDEO_ADV_DEBUG
433 static int vidioc_g_register(struct file *file, void *priv,
434 struct v4l2_dbg_register *reg)
436 struct usb_usbvision *usbvision = video_drvdata(file);
439 /* NT100x has a 8-bit register space */
440 err_code = usbvision_read_reg(usbvision, reg->reg&0xff);
442 dev_err(&usbvision->vdev.dev,
443 "%s: VIDIOC_DBG_G_REGISTER failed: error %d\n",
452 static int vidioc_s_register(struct file *file, void *priv,
453 const struct v4l2_dbg_register *reg)
455 struct usb_usbvision *usbvision = video_drvdata(file);
458 /* NT100x has a 8-bit register space */
459 err_code = usbvision_write_reg(usbvision, reg->reg & 0xff, reg->val);
461 dev_err(&usbvision->vdev.dev,
462 "%s: VIDIOC_DBG_S_REGISTER failed: error %d\n",
470 static int vidioc_querycap(struct file *file, void *priv,
471 struct v4l2_capability *vc)
473 struct usb_usbvision *usbvision = video_drvdata(file);
474 struct video_device *vdev = video_devdata(file);
476 strlcpy(vc->driver, "USBVision", sizeof(vc->driver));
478 usbvision_device_data[usbvision->dev_model].model_string,
480 usb_make_path(usbvision->dev, vc->bus_info, sizeof(vc->bus_info));
481 vc->device_caps = usbvision->have_tuner ? V4L2_CAP_TUNER : 0;
482 if (vdev->vfl_type == VFL_TYPE_GRABBER)
483 vc->device_caps |= V4L2_CAP_VIDEO_CAPTURE |
484 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
486 vc->device_caps |= V4L2_CAP_RADIO;
488 vc->capabilities = vc->device_caps | V4L2_CAP_VIDEO_CAPTURE |
489 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
490 if (usbvision_device_data[usbvision->dev_model].radio)
491 vc->capabilities |= V4L2_CAP_RADIO;
495 static int vidioc_enum_input(struct file *file, void *priv,
496 struct v4l2_input *vi)
498 struct usb_usbvision *usbvision = video_drvdata(file);
501 if (vi->index >= usbvision->video_inputs)
503 if (usbvision->have_tuner)
506 chan = vi->index + 1; /* skip Television string*/
508 /* Determine the requested input characteristics
509 specific for each usbvision card model */
512 if (usbvision_device_data[usbvision->dev_model].video_channels == 4) {
513 strcpy(vi->name, "White Video Input");
515 strcpy(vi->name, "Television");
516 vi->type = V4L2_INPUT_TYPE_TUNER;
518 vi->std = USBVISION_NORMS;
522 vi->type = V4L2_INPUT_TYPE_CAMERA;
523 if (usbvision_device_data[usbvision->dev_model].video_channels == 4)
524 strcpy(vi->name, "Green Video Input");
526 strcpy(vi->name, "Composite Video Input");
527 vi->std = USBVISION_NORMS;
530 vi->type = V4L2_INPUT_TYPE_CAMERA;
531 if (usbvision_device_data[usbvision->dev_model].video_channels == 4)
532 strcpy(vi->name, "Yellow Video Input");
534 strcpy(vi->name, "S-Video Input");
535 vi->std = USBVISION_NORMS;
538 vi->type = V4L2_INPUT_TYPE_CAMERA;
539 strcpy(vi->name, "Red Video Input");
540 vi->std = USBVISION_NORMS;
546 static int vidioc_g_input(struct file *file, void *priv, unsigned int *input)
548 struct usb_usbvision *usbvision = video_drvdata(file);
550 *input = usbvision->ctl_input;
554 static int vidioc_s_input(struct file *file, void *priv, unsigned int input)
556 struct usb_usbvision *usbvision = video_drvdata(file);
558 if (input >= usbvision->video_inputs)
561 usbvision_muxsel(usbvision, input);
562 usbvision_set_input(usbvision);
563 usbvision_set_output(usbvision,
565 usbvision->curheight);
569 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
571 struct usb_usbvision *usbvision = video_drvdata(file);
573 usbvision->tvnorm_id = id;
575 call_all(usbvision, video, s_std, usbvision->tvnorm_id);
576 /* propagate the change to the decoder */
577 usbvision_muxsel(usbvision, usbvision->ctl_input);
582 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
584 struct usb_usbvision *usbvision = video_drvdata(file);
586 *id = usbvision->tvnorm_id;
590 static int vidioc_g_tuner(struct file *file, void *priv,
591 struct v4l2_tuner *vt)
593 struct usb_usbvision *usbvision = video_drvdata(file);
595 if (vt->index) /* Only tuner 0 */
597 if (vt->type == V4L2_TUNER_RADIO)
598 strcpy(vt->name, "Radio");
600 strcpy(vt->name, "Television");
602 /* Let clients fill in the remainder of this struct */
603 call_all(usbvision, tuner, g_tuner, vt);
608 static int vidioc_s_tuner(struct file *file, void *priv,
609 const struct v4l2_tuner *vt)
611 struct usb_usbvision *usbvision = video_drvdata(file);
613 /* Only one tuner for now */
616 /* let clients handle this */
617 call_all(usbvision, tuner, s_tuner, vt);
622 static int vidioc_g_frequency(struct file *file, void *priv,
623 struct v4l2_frequency *freq)
625 struct usb_usbvision *usbvision = video_drvdata(file);
630 if (freq->type == V4L2_TUNER_RADIO)
631 freq->frequency = usbvision->radio_freq;
633 freq->frequency = usbvision->tv_freq;
638 static int vidioc_s_frequency(struct file *file, void *priv,
639 const struct v4l2_frequency *freq)
641 struct usb_usbvision *usbvision = video_drvdata(file);
642 struct v4l2_frequency new_freq = *freq;
644 /* Only one tuner for now */
648 call_all(usbvision, tuner, s_frequency, freq);
649 call_all(usbvision, tuner, g_frequency, &new_freq);
650 if (freq->type == V4L2_TUNER_RADIO)
651 usbvision->radio_freq = new_freq.frequency;
653 usbvision->tv_freq = new_freq.frequency;
658 static int vidioc_reqbufs(struct file *file,
659 void *priv, struct v4l2_requestbuffers *vr)
661 struct usb_usbvision *usbvision = video_drvdata(file);
664 RESTRICT_TO_RANGE(vr->count, 1, USBVISION_NUMFRAMES);
666 /* Check input validity:
667 the user must do a VIDEO CAPTURE and MMAP method. */
668 if (vr->memory != V4L2_MEMORY_MMAP)
671 if (usbvision->streaming == stream_on) {
672 ret = usbvision_stream_interrupt(usbvision);
677 usbvision_frames_free(usbvision);
678 usbvision_empty_framequeues(usbvision);
679 vr->count = usbvision_frames_alloc(usbvision, vr->count);
681 usbvision->cur_frame = NULL;
686 static int vidioc_querybuf(struct file *file,
687 void *priv, struct v4l2_buffer *vb)
689 struct usb_usbvision *usbvision = video_drvdata(file);
690 struct usbvision_frame *frame;
692 /* FIXME : must control
693 that buffers are mapped (VIDIOC_REQBUFS has been called) */
694 if (vb->index >= usbvision->num_frames)
696 /* Updating the corresponding frame state */
697 vb->flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
698 frame = &usbvision->frame[vb->index];
699 if (frame->grabstate >= frame_state_ready)
700 vb->flags |= V4L2_BUF_FLAG_QUEUED;
701 if (frame->grabstate >= frame_state_done)
702 vb->flags |= V4L2_BUF_FLAG_DONE;
703 if (frame->grabstate == frame_state_unused)
704 vb->flags |= V4L2_BUF_FLAG_MAPPED;
705 vb->memory = V4L2_MEMORY_MMAP;
707 vb->m.offset = vb->index * PAGE_ALIGN(usbvision->max_frame_size);
709 vb->memory = V4L2_MEMORY_MMAP;
710 vb->field = V4L2_FIELD_NONE;
711 vb->length = usbvision->curwidth *
712 usbvision->curheight *
713 usbvision->palette.bytes_per_pixel;
714 vb->timestamp = usbvision->frame[vb->index].timestamp;
715 vb->sequence = usbvision->frame[vb->index].sequence;
719 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *vb)
721 struct usb_usbvision *usbvision = video_drvdata(file);
722 struct usbvision_frame *frame;
723 unsigned long lock_flags;
725 /* FIXME : works only on VIDEO_CAPTURE MODE, MMAP. */
726 if (vb->index >= usbvision->num_frames)
729 frame = &usbvision->frame[vb->index];
731 if (frame->grabstate != frame_state_unused)
734 /* Mark it as ready and enqueue frame */
735 frame->grabstate = frame_state_ready;
736 frame->scanstate = scan_state_scanning;
737 frame->scanlength = 0; /* Accumulated in usbvision_parse_data() */
739 vb->flags &= ~V4L2_BUF_FLAG_DONE;
741 /* set v4l2_format index */
742 frame->v4l2_format = usbvision->palette;
744 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
745 list_add_tail(&usbvision->frame[vb->index].frame, &usbvision->inqueue);
746 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
751 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *vb)
753 struct usb_usbvision *usbvision = video_drvdata(file);
755 struct usbvision_frame *f;
756 unsigned long lock_flags;
758 if (list_empty(&(usbvision->outqueue))) {
759 if (usbvision->streaming == stream_idle)
761 ret = wait_event_interruptible
762 (usbvision->wait_frame,
763 !list_empty(&(usbvision->outqueue)));
768 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
769 f = list_entry(usbvision->outqueue.next,
770 struct usbvision_frame, frame);
771 list_del(usbvision->outqueue.next);
772 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
774 f->grabstate = frame_state_unused;
776 vb->memory = V4L2_MEMORY_MMAP;
777 vb->flags = V4L2_BUF_FLAG_MAPPED |
778 V4L2_BUF_FLAG_QUEUED |
780 V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
781 vb->index = f->index;
782 vb->sequence = f->sequence;
783 vb->timestamp = f->timestamp;
784 vb->field = V4L2_FIELD_NONE;
785 vb->bytesused = f->scanlength;
790 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
792 struct usb_usbvision *usbvision = video_drvdata(file);
794 usbvision->streaming = stream_on;
795 call_all(usbvision, video, s_stream, 1);
800 static int vidioc_streamoff(struct file *file,
801 void *priv, enum v4l2_buf_type type)
803 struct usb_usbvision *usbvision = video_drvdata(file);
805 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
808 if (usbvision->streaming == stream_on) {
809 usbvision_stream_interrupt(usbvision);
810 /* Stop all video streamings */
811 call_all(usbvision, video, s_stream, 0);
813 usbvision_empty_framequeues(usbvision);
818 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
819 struct v4l2_fmtdesc *vfd)
821 if (vfd->index >= USBVISION_SUPPORTED_PALETTES - 1)
823 strcpy(vfd->description, usbvision_v4l2_format[vfd->index].desc);
824 vfd->pixelformat = usbvision_v4l2_format[vfd->index].format;
828 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
829 struct v4l2_format *vf)
831 struct usb_usbvision *usbvision = video_drvdata(file);
832 vf->fmt.pix.width = usbvision->curwidth;
833 vf->fmt.pix.height = usbvision->curheight;
834 vf->fmt.pix.pixelformat = usbvision->palette.format;
835 vf->fmt.pix.bytesperline =
836 usbvision->curwidth * usbvision->palette.bytes_per_pixel;
837 vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline * usbvision->curheight;
838 vf->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
839 vf->fmt.pix.field = V4L2_FIELD_NONE; /* Always progressive image */
844 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
845 struct v4l2_format *vf)
847 struct usb_usbvision *usbvision = video_drvdata(file);
850 /* Find requested format in available ones */
851 for (format_idx = 0; format_idx < USBVISION_SUPPORTED_PALETTES; format_idx++) {
852 if (vf->fmt.pix.pixelformat ==
853 usbvision_v4l2_format[format_idx].format) {
854 usbvision->palette = usbvision_v4l2_format[format_idx];
859 if (format_idx == USBVISION_SUPPORTED_PALETTES)
861 RESTRICT_TO_RANGE(vf->fmt.pix.width, MIN_FRAME_WIDTH, MAX_FRAME_WIDTH);
862 RESTRICT_TO_RANGE(vf->fmt.pix.height, MIN_FRAME_HEIGHT, MAX_FRAME_HEIGHT);
864 vf->fmt.pix.bytesperline = vf->fmt.pix.width*
865 usbvision->palette.bytes_per_pixel;
866 vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline*vf->fmt.pix.height;
867 vf->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
868 vf->fmt.pix.field = V4L2_FIELD_NONE; /* Always progressive image */
873 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
874 struct v4l2_format *vf)
876 struct usb_usbvision *usbvision = video_drvdata(file);
879 ret = vidioc_try_fmt_vid_cap(file, priv, vf);
883 /* stop io in case it is already in progress */
884 if (usbvision->streaming == stream_on) {
885 ret = usbvision_stream_interrupt(usbvision);
889 usbvision_frames_free(usbvision);
890 usbvision_empty_framequeues(usbvision);
892 usbvision->cur_frame = NULL;
894 /* by now we are committed to the new data... */
895 usbvision_set_output(usbvision, vf->fmt.pix.width, vf->fmt.pix.height);
900 static ssize_t usbvision_read(struct file *file, char __user *buf,
901 size_t count, loff_t *ppos)
903 struct usb_usbvision *usbvision = video_drvdata(file);
904 int noblock = file->f_flags & O_NONBLOCK;
905 unsigned long lock_flags;
907 struct usbvision_frame *frame;
909 PDEBUG(DBG_IO, "%s: %ld bytes, noblock=%d", __func__,
910 (unsigned long)count, noblock);
912 if (!USBVISION_IS_OPERATIONAL(usbvision) || !buf)
915 /* This entry point is compatible with the mmap routines
916 so that a user can do either VIDIOC_QBUF/VIDIOC_DQBUF
917 to get frames or call read on the device. */
918 if (!usbvision->num_frames) {
919 /* First, allocate some frames to work with
920 if this has not been done with VIDIOC_REQBUF */
921 usbvision_frames_free(usbvision);
922 usbvision_empty_framequeues(usbvision);
923 usbvision_frames_alloc(usbvision, USBVISION_NUMFRAMES);
926 if (usbvision->streaming != stream_on) {
927 /* no stream is running, make it running ! */
928 usbvision->streaming = stream_on;
929 call_all(usbvision, video, s_stream, 1);
932 /* Then, enqueue as many frames as possible
933 (like a user of VIDIOC_QBUF would do) */
934 for (i = 0; i < usbvision->num_frames; i++) {
935 frame = &usbvision->frame[i];
936 if (frame->grabstate == frame_state_unused) {
937 /* Mark it as ready and enqueue frame */
938 frame->grabstate = frame_state_ready;
939 frame->scanstate = scan_state_scanning;
940 /* Accumulated in usbvision_parse_data() */
941 frame->scanlength = 0;
943 /* set v4l2_format index */
944 frame->v4l2_format = usbvision->palette;
946 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
947 list_add_tail(&frame->frame, &usbvision->inqueue);
948 spin_unlock_irqrestore(&usbvision->queue_lock,
953 /* Then try to steal a frame (like a VIDIOC_DQBUF would do) */
954 if (list_empty(&(usbvision->outqueue))) {
958 ret = wait_event_interruptible
959 (usbvision->wait_frame,
960 !list_empty(&(usbvision->outqueue)));
965 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
966 frame = list_entry(usbvision->outqueue.next,
967 struct usbvision_frame, frame);
968 list_del(usbvision->outqueue.next);
969 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
971 /* An error returns an empty frame */
972 if (frame->grabstate == frame_state_error) {
973 frame->bytes_read = 0;
977 PDEBUG(DBG_IO, "%s: frmx=%d, bytes_read=%ld, scanlength=%ld",
979 frame->index, frame->bytes_read, frame->scanlength);
981 /* copy bytes to user space; we allow for partials reads */
982 if ((count + frame->bytes_read) > (unsigned long)frame->scanlength)
983 count = frame->scanlength - frame->bytes_read;
985 if (copy_to_user(buf, frame->data + frame->bytes_read, count))
988 frame->bytes_read += count;
989 PDEBUG(DBG_IO, "%s: {copy} count used=%ld, new bytes_read=%ld",
991 (unsigned long)count, frame->bytes_read);
996 * For now, forget the frame if it has not been read in one shot.
998 frame->bytes_read = 0;
1000 /* Mark it as available to be used again. */
1001 frame->grabstate = frame_state_unused;
1003 if (frame->bytes_read >= frame->scanlength) {
1004 /* All data has been read */
1005 frame->bytes_read = 0;
1007 /* Mark it as available to be used again. */
1008 frame->grabstate = frame_state_unused;
1015 static ssize_t usbvision_v4l2_read(struct file *file, char __user *buf,
1016 size_t count, loff_t *ppos)
1018 struct usb_usbvision *usbvision = video_drvdata(file);
1021 if (mutex_lock_interruptible(&usbvision->v4l2_lock))
1022 return -ERESTARTSYS;
1023 res = usbvision_read(file, buf, count, ppos);
1024 mutex_unlock(&usbvision->v4l2_lock);
1028 static int usbvision_mmap(struct file *file, struct vm_area_struct *vma)
1030 unsigned long size = vma->vm_end - vma->vm_start,
1031 start = vma->vm_start;
1034 struct usb_usbvision *usbvision = video_drvdata(file);
1036 PDEBUG(DBG_MMAP, "mmap");
1038 if (!USBVISION_IS_OPERATIONAL(usbvision))
1041 if (!(vma->vm_flags & VM_WRITE) ||
1042 size != PAGE_ALIGN(usbvision->max_frame_size)) {
1046 for (i = 0; i < usbvision->num_frames; i++) {
1047 if (((PAGE_ALIGN(usbvision->max_frame_size)*i) >> PAGE_SHIFT) ==
1051 if (i == usbvision->num_frames) {
1053 "mmap: user supplied mapping address is out of range");
1057 /* VM_IO is eventually going to replace PageReserved altogether */
1058 vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
1060 pos = usbvision->frame[i].data;
1062 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1063 PDEBUG(DBG_MMAP, "mmap: vm_insert_page failed");
1074 static int usbvision_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
1076 struct usb_usbvision *usbvision = video_drvdata(file);
1079 if (mutex_lock_interruptible(&usbvision->v4l2_lock))
1080 return -ERESTARTSYS;
1081 res = usbvision_mmap(file, vma);
1082 mutex_unlock(&usbvision->v4l2_lock);
1087 * Here comes the stuff for radio on usbvision based devices
1090 static int usbvision_radio_open(struct file *file)
1092 struct usb_usbvision *usbvision = video_drvdata(file);
1095 PDEBUG(DBG_IO, "%s:", __func__);
1097 if (mutex_lock_interruptible(&usbvision->v4l2_lock))
1098 return -ERESTARTSYS;
1100 if (usbvision->remove_pending) {
1104 err_code = v4l2_fh_open(file);
1107 if (usbvision->user) {
1108 dev_err(&usbvision->rdev.dev,
1109 "%s: Someone tried to open an already opened USBVision Radio!\n",
1113 /* Alternate interface 1 is is the biggest frame size */
1114 err_code = usbvision_set_alternate(usbvision);
1116 usbvision->last_error = err_code;
1121 /* If so far no errors then we shall start the radio */
1122 usbvision->radio = 1;
1123 call_all(usbvision, tuner, s_radio);
1124 usbvision_set_audio(usbvision, USBVISION_AUDIO_RADIO);
1128 mutex_unlock(&usbvision->v4l2_lock);
1133 static int usbvision_radio_close(struct file *file)
1135 struct usb_usbvision *usbvision = video_drvdata(file);
1140 mutex_lock(&usbvision->v4l2_lock);
1141 /* Set packet size to 0 */
1142 usbvision->iface_alt = 0;
1143 usb_set_interface(usbvision->dev, usbvision->iface,
1144 usbvision->iface_alt);
1146 usbvision_audio_off(usbvision);
1147 usbvision->radio = 0;
1149 r = usbvision->remove_pending;
1150 mutex_unlock(&usbvision->v4l2_lock);
1153 printk(KERN_INFO "%s: Final disconnect\n", __func__);
1154 v4l2_fh_release(file);
1155 usbvision_release(usbvision);
1159 PDEBUG(DBG_IO, "success");
1160 return v4l2_fh_release(file);
1163 /* Video registration stuff */
1165 /* Video template */
1166 static const struct v4l2_file_operations usbvision_fops = {
1167 .owner = THIS_MODULE,
1168 .open = usbvision_v4l2_open,
1169 .release = usbvision_v4l2_close,
1170 .read = usbvision_v4l2_read,
1171 .mmap = usbvision_v4l2_mmap,
1172 .unlocked_ioctl = video_ioctl2,
1175 static const struct v4l2_ioctl_ops usbvision_ioctl_ops = {
1176 .vidioc_querycap = vidioc_querycap,
1177 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1178 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1179 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1180 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1181 .vidioc_reqbufs = vidioc_reqbufs,
1182 .vidioc_querybuf = vidioc_querybuf,
1183 .vidioc_qbuf = vidioc_qbuf,
1184 .vidioc_dqbuf = vidioc_dqbuf,
1185 .vidioc_s_std = vidioc_s_std,
1186 .vidioc_g_std = vidioc_g_std,
1187 .vidioc_enum_input = vidioc_enum_input,
1188 .vidioc_g_input = vidioc_g_input,
1189 .vidioc_s_input = vidioc_s_input,
1190 .vidioc_streamon = vidioc_streamon,
1191 .vidioc_streamoff = vidioc_streamoff,
1192 .vidioc_g_tuner = vidioc_g_tuner,
1193 .vidioc_s_tuner = vidioc_s_tuner,
1194 .vidioc_g_frequency = vidioc_g_frequency,
1195 .vidioc_s_frequency = vidioc_s_frequency,
1196 .vidioc_log_status = v4l2_ctrl_log_status,
1197 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1198 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1199 #ifdef CONFIG_VIDEO_ADV_DEBUG
1200 .vidioc_g_register = vidioc_g_register,
1201 .vidioc_s_register = vidioc_s_register,
1205 static struct video_device usbvision_video_template = {
1206 .fops = &usbvision_fops,
1207 .ioctl_ops = &usbvision_ioctl_ops,
1208 .name = "usbvision-video",
1209 .release = video_device_release_empty,
1210 .tvnorms = USBVISION_NORMS,
1214 /* Radio template */
1215 static const struct v4l2_file_operations usbvision_radio_fops = {
1216 .owner = THIS_MODULE,
1217 .open = usbvision_radio_open,
1218 .release = usbvision_radio_close,
1219 .poll = v4l2_ctrl_poll,
1220 .unlocked_ioctl = video_ioctl2,
1223 static const struct v4l2_ioctl_ops usbvision_radio_ioctl_ops = {
1224 .vidioc_querycap = vidioc_querycap,
1225 .vidioc_g_tuner = vidioc_g_tuner,
1226 .vidioc_s_tuner = vidioc_s_tuner,
1227 .vidioc_g_frequency = vidioc_g_frequency,
1228 .vidioc_s_frequency = vidioc_s_frequency,
1229 .vidioc_log_status = v4l2_ctrl_log_status,
1230 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1231 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1234 static struct video_device usbvision_radio_template = {
1235 .fops = &usbvision_radio_fops,
1236 .name = "usbvision-radio",
1237 .release = video_device_release_empty,
1238 .ioctl_ops = &usbvision_radio_ioctl_ops,
1242 static void usbvision_vdev_init(struct usb_usbvision *usbvision,
1243 struct video_device *vdev,
1244 const struct video_device *vdev_template,
1247 struct usb_device *usb_dev = usbvision->dev;
1250 dev_err(&usbvision->dev->dev,
1251 "%s: usbvision->dev is not set\n", __func__);
1255 *vdev = *vdev_template;
1256 vdev->lock = &usbvision->v4l2_lock;
1257 vdev->v4l2_dev = &usbvision->v4l2_dev;
1258 snprintf(vdev->name, sizeof(vdev->name), "%s", name);
1259 video_set_drvdata(vdev, usbvision);
1262 /* unregister video4linux devices */
1263 static void usbvision_unregister_video(struct usb_usbvision *usbvision)
1266 if (video_is_registered(&usbvision->rdev)) {
1267 PDEBUG(DBG_PROBE, "unregister %s [v4l2]",
1268 video_device_node_name(&usbvision->rdev));
1269 video_unregister_device(&usbvision->rdev);
1273 if (video_is_registered(&usbvision->vdev)) {
1274 PDEBUG(DBG_PROBE, "unregister %s [v4l2]",
1275 video_device_node_name(&usbvision->vdev));
1276 video_unregister_device(&usbvision->vdev);
1280 /* register video4linux devices */
1281 static int usbvision_register_video(struct usb_usbvision *usbvision)
1286 usbvision_vdev_init(usbvision, &usbvision->vdev,
1287 &usbvision_video_template, "USBVision Video");
1288 if (!usbvision->have_tuner) {
1289 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_G_FREQUENCY);
1290 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_S_TUNER);
1291 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_G_FREQUENCY);
1292 v4l2_disable_ioctl(&usbvision->vdev, VIDIOC_S_TUNER);
1294 if (video_register_device(&usbvision->vdev, VFL_TYPE_GRABBER, video_nr) < 0)
1296 printk(KERN_INFO "USBVision[%d]: registered USBVision Video device %s [v4l2]\n",
1297 usbvision->nr, video_device_node_name(&usbvision->vdev));
1300 if (usbvision_device_data[usbvision->dev_model].radio) {
1301 /* usbvision has radio */
1302 usbvision_vdev_init(usbvision, &usbvision->rdev,
1303 &usbvision_radio_template, "USBVision Radio");
1304 if (video_register_device(&usbvision->rdev, VFL_TYPE_RADIO, radio_nr) < 0)
1306 printk(KERN_INFO "USBVision[%d]: registered USBVision Radio device %s [v4l2]\n",
1307 usbvision->nr, video_device_node_name(&usbvision->rdev));
1313 dev_err(&usbvision->dev->dev,
1314 "USBVision[%d]: video_register_device() failed\n",
1316 usbvision_unregister_video(usbvision);
1323 * This code allocates the struct usb_usbvision.
1324 * It is filled with default values.
1326 * Returns NULL on error, a pointer to usb_usbvision else.
1329 static struct usb_usbvision *usbvision_alloc(struct usb_device *dev,
1330 struct usb_interface *intf)
1332 struct usb_usbvision *usbvision;
1334 usbvision = kzalloc(sizeof(*usbvision), GFP_KERNEL);
1338 usbvision->dev = dev;
1339 if (v4l2_device_register(&intf->dev, &usbvision->v4l2_dev))
1342 if (v4l2_ctrl_handler_init(&usbvision->hdl, 4))
1344 usbvision->v4l2_dev.ctrl_handler = &usbvision->hdl;
1345 mutex_init(&usbvision->v4l2_lock);
1347 /* prepare control urb for control messages during interrupts */
1348 usbvision->ctrl_urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
1349 if (!usbvision->ctrl_urb)
1355 v4l2_ctrl_handler_free(&usbvision->hdl);
1356 v4l2_device_unregister(&usbvision->v4l2_dev);
1363 * usbvision_release()
1365 * This code does final release of struct usb_usbvision. This happens
1366 * after the device is disconnected -and- all clients closed their files.
1369 static void usbvision_release(struct usb_usbvision *usbvision)
1371 PDEBUG(DBG_PROBE, "");
1373 usbvision->initialized = 0;
1375 usbvision_remove_sysfs(&usbvision->vdev);
1376 usbvision_unregister_video(usbvision);
1377 kfree(usbvision->alt_max_pkt_size);
1379 usb_free_urb(usbvision->ctrl_urb);
1381 v4l2_ctrl_handler_free(&usbvision->hdl);
1382 v4l2_device_unregister(&usbvision->v4l2_dev);
1385 PDEBUG(DBG_PROBE, "success");
1389 /*********************** usb interface **********************************/
1391 static void usbvision_configure_video(struct usb_usbvision *usbvision)
1398 model = usbvision->dev_model;
1399 usbvision->palette = usbvision_v4l2_format[2]; /* V4L2_PIX_FMT_RGB24; */
1401 if (usbvision_device_data[usbvision->dev_model].vin_reg2_override) {
1402 usbvision->vin_reg2_preset =
1403 usbvision_device_data[usbvision->dev_model].vin_reg2;
1405 usbvision->vin_reg2_preset = 0;
1408 usbvision->tvnorm_id = usbvision_device_data[model].video_norm;
1409 usbvision->video_inputs = usbvision_device_data[model].video_channels;
1410 usbvision->ctl_input = 0;
1411 usbvision->radio_freq = 87.5 * 16000;
1412 usbvision->tv_freq = 400 * 16;
1414 /* This should be here to make i2c clients to be able to register */
1415 /* first switch off audio */
1416 if (usbvision_device_data[model].audio_channels > 0)
1417 usbvision_audio_off(usbvision);
1418 /* and then power up the tuner */
1419 usbvision_power_on(usbvision);
1420 usbvision_i2c_register(usbvision);
1426 * This procedure queries device descriptor and accepts the interface
1427 * if it looks like USBVISION video device
1430 static int usbvision_probe(struct usb_interface *intf,
1431 const struct usb_device_id *devid)
1433 struct usb_device *dev = usb_get_dev(interface_to_usbdev(intf));
1434 struct usb_interface *uif;
1435 __u8 ifnum = intf->altsetting->desc.bInterfaceNumber;
1436 const struct usb_host_interface *interface;
1437 struct usb_usbvision *usbvision = NULL;
1438 const struct usb_endpoint_descriptor *endpoint;
1441 PDEBUG(DBG_PROBE, "VID=%#04x, PID=%#04x, ifnum=%u",
1442 le16_to_cpu(dev->descriptor.idVendor),
1443 le16_to_cpu(dev->descriptor.idProduct), ifnum);
1445 model = devid->driver_info;
1446 if (model < 0 || model >= usbvision_device_data_size) {
1447 PDEBUG(DBG_PROBE, "model out of bounds %d", model);
1451 printk(KERN_INFO "%s: %s found\n", __func__,
1452 usbvision_device_data[model].model_string);
1454 if (usbvision_device_data[model].interface >= 0)
1455 interface = &dev->actconfig->interface[usbvision_device_data[model].interface]->altsetting[0];
1456 else if (ifnum < dev->actconfig->desc.bNumInterfaces)
1457 interface = &dev->actconfig->interface[ifnum]->altsetting[0];
1459 dev_err(&intf->dev, "interface %d is invalid, max is %d\n",
1460 ifnum, dev->actconfig->desc.bNumInterfaces - 1);
1465 if (interface->desc.bNumEndpoints < 2) {
1466 dev_err(&intf->dev, "interface %d has %d endpoints, but must have minimum 2\n",
1467 ifnum, interface->desc.bNumEndpoints);
1471 endpoint = &interface->endpoint[1].desc;
1473 if (!usb_endpoint_xfer_isoc(endpoint)) {
1474 dev_err(&intf->dev, "%s: interface %d. has non-ISO endpoint!\n",
1476 dev_err(&intf->dev, "%s: Endpoint attributes %d",
1477 __func__, endpoint->bmAttributes);
1481 if (usb_endpoint_dir_out(endpoint)) {
1482 dev_err(&intf->dev, "%s: interface %d. has ISO OUT endpoint!\n",
1488 usbvision = usbvision_alloc(dev, intf);
1490 dev_err(&intf->dev, "%s: couldn't allocate USBVision struct\n", __func__);
1495 if (dev->descriptor.bNumConfigurations > 1)
1496 usbvision->bridge_type = BRIDGE_NT1004;
1497 else if (model == DAZZLE_DVC_90_REV_1_SECAM)
1498 usbvision->bridge_type = BRIDGE_NT1005;
1500 usbvision->bridge_type = BRIDGE_NT1003;
1501 PDEBUG(DBG_PROBE, "bridge_type %d", usbvision->bridge_type);
1503 /* compute alternate max packet sizes */
1504 uif = dev->actconfig->interface[0];
1506 usbvision->num_alt = uif->num_altsetting;
1507 PDEBUG(DBG_PROBE, "Alternate settings: %i", usbvision->num_alt);
1508 usbvision->alt_max_pkt_size = kmalloc_array(32, usbvision->num_alt,
1510 if (!usbvision->alt_max_pkt_size) {
1515 for (i = 0; i < usbvision->num_alt; i++) {
1518 if (uif->altsetting[i].desc.bNumEndpoints < 2) {
1523 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1525 usbvision->alt_max_pkt_size[i] =
1526 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1527 PDEBUG(DBG_PROBE, "Alternate setting %i, max size= %i", i,
1528 usbvision->alt_max_pkt_size[i]);
1532 usbvision->nr = usbvision_nr++;
1534 spin_lock_init(&usbvision->queue_lock);
1535 init_waitqueue_head(&usbvision->wait_frame);
1536 init_waitqueue_head(&usbvision->wait_stream);
1538 usbvision->have_tuner = usbvision_device_data[model].tuner;
1539 if (usbvision->have_tuner)
1540 usbvision->tuner_type = usbvision_device_data[model].tuner_type;
1542 usbvision->dev_model = model;
1543 usbvision->remove_pending = 0;
1544 usbvision->iface = ifnum;
1545 usbvision->iface_alt = 0;
1546 usbvision->video_endp = endpoint->bEndpointAddress;
1547 usbvision->isoc_packet_size = 0;
1548 usbvision->usb_bandwidth = 0;
1549 usbvision->user = 0;
1550 usbvision->streaming = stream_off;
1551 usbvision_configure_video(usbvision);
1552 usbvision_register_video(usbvision);
1554 usbvision_create_sysfs(&usbvision->vdev);
1556 PDEBUG(DBG_PROBE, "success");
1560 usbvision_release(usbvision);
1568 * usbvision_disconnect()
1570 * This procedure stops all driver activity, deallocates interface-private
1571 * structure (pointed by 'ptr') and after that driver should be removable
1572 * with no ill consequences.
1575 static void usbvision_disconnect(struct usb_interface *intf)
1577 struct usb_usbvision *usbvision = to_usbvision(usb_get_intfdata(intf));
1580 PDEBUG(DBG_PROBE, "");
1583 pr_err("%s: usb_get_intfdata() failed\n", __func__);
1587 mutex_lock(&usbvision->v4l2_lock);
1589 /* At this time we ask to cancel outstanding URBs */
1590 usbvision_stop_isoc(usbvision);
1592 v4l2_device_disconnect(&usbvision->v4l2_dev);
1593 usbvision_i2c_unregister(usbvision);
1594 usbvision->remove_pending = 1; /* Now all ISO data will be ignored */
1595 u = usbvision->user;
1597 usb_put_dev(usbvision->dev);
1598 usbvision->dev = NULL; /* USB device is no more */
1600 mutex_unlock(&usbvision->v4l2_lock);
1603 printk(KERN_INFO "%s: In use, disconnect pending\n",
1605 wake_up_interruptible(&usbvision->wait_frame);
1606 wake_up_interruptible(&usbvision->wait_stream);
1608 usbvision_release(usbvision);
1611 PDEBUG(DBG_PROBE, "success");
1614 static struct usb_driver usbvision_driver = {
1615 .name = "usbvision",
1616 .id_table = usbvision_table,
1617 .probe = usbvision_probe,
1618 .disconnect = usbvision_disconnect,
1624 * This code is run to initialize the driver.
1627 static int __init usbvision_init(void)
1631 PDEBUG(DBG_PROBE, "");
1633 PDEBUG(DBG_IO, "IO debugging is enabled [video]");
1634 PDEBUG(DBG_PROBE, "PROBE debugging is enabled [video]");
1635 PDEBUG(DBG_MMAP, "MMAP debugging is enabled [video]");
1637 /* disable planar mode support unless compression enabled */
1638 if (isoc_mode != ISOC_MODE_COMPRESS) {
1639 /* FIXME : not the right way to set supported flag */
1640 usbvision_v4l2_format[6].supported = 0; /* V4L2_PIX_FMT_YVU420 */
1641 usbvision_v4l2_format[7].supported = 0; /* V4L2_PIX_FMT_YUV422P */
1644 err_code = usb_register(&usbvision_driver);
1646 if (err_code == 0) {
1647 printk(KERN_INFO DRIVER_DESC " : " USBVISION_VERSION_STRING "\n");
1648 PDEBUG(DBG_PROBE, "success");
1653 static void __exit usbvision_exit(void)
1655 PDEBUG(DBG_PROBE, "");
1657 usb_deregister(&usbvision_driver);
1658 PDEBUG(DBG_PROBE, "success");
1661 module_init(usbvision_init);
1662 module_exit(usbvision_exit);