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LeafOS / LeafOS-Devices / android_kernel_samsung_exynos9820 / e6b5be2be4e30037eb551e0ed09dd97bd00d85d3 / . / drivers / media / usb / usbvision / usbvision-video.c
blob: 693d5f409138f6eeedeb2470f07def85be5a4cf8 [file] [log] [blame]
/*
* USB USBVISION Video device driver 0.9.10
*
*
*
* Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
*
* This module is part of usbvision driver project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Let's call the version 0.... until compression decoding is completely
* implemented.
*
* This driver is written by Jose Ignacio Gijon and Joerg Heckenbach.
* It was based on USB CPiA driver written by Peter Pregler,
* Scott J. Bertin and Johannes Erdfelt
* Ideas are taken from bttv driver by Ralph Metzler, Marcus Metzler &
* Gerd Knorr and zoran 36120/36125 driver by Pauline Middelink
* Updates to driver completed by Dwaine P. Garden
*
*
* TODO:
* - use submit_urb for all setup packets
* - Fix memory settings for nt1004. It is 4 times as big as the
* nt1003 memory.
* - Add audio on endpoint 3 for nt1004 chip.
* Seems impossible, needs a codec interface. Which one?
* - Clean up the driver.
* - optimization for performance.
* - Add Videotext capability (VBI). Working on it.....
* - Check audio for other devices
*
*/
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/vmalloc.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/videodev2.h>
#include <linux/i2c.h>
#include <media/saa7115.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/tuner.h>
#include <linux/workqueue.h>
#include "usbvision.h"
#include "usbvision-cards.h"
#define DRIVER_AUTHOR \
"Joerg Heckenbach <joerg@heckenbach-aw.de>, " \
"Dwaine Garden <DwaineGarden@rogers.com>"
#define DRIVER_NAME "usbvision"
#define DRIVER_ALIAS "USBVision"
#define DRIVER_DESC "USBVision USB Video Device Driver for Linux"
#define DRIVER_LICENSE "GPL"
#define USBVISION_VERSION_STRING "0.9.11"
#define ENABLE_HEXDUMP 0 /* Enable if you need it */
#ifdef USBVISION_DEBUG
#define PDEBUG(level, fmt, args...) { \
if (video_debug & (level)) \
printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
__func__, __LINE__ , ## args); \
}
#else
#define PDEBUG(level, fmt, args...) do {} while (0)
#endif
#define DBG_IO (1 << 1)
#define DBG_PROBE (1 << 2)
#define DBG_MMAP (1 << 3)
/* String operations */
#define rmspace(str) while (*str == ' ') str++;
#define goto2next(str) while (*str != ' ') str++; while (*str == ' ') str++;
/* sequential number of usbvision device */
static int usbvision_nr;
static struct usbvision_v4l2_format_st usbvision_v4l2_format[] = {
{ 1, 1, 8, V4L2_PIX_FMT_GREY , "GREY" },
{ 1, 2, 16, V4L2_PIX_FMT_RGB565 , "RGB565" },
{ 1, 3, 24, V4L2_PIX_FMT_RGB24 , "RGB24" },
{ 1, 4, 32, V4L2_PIX_FMT_RGB32 , "RGB32" },
{ 1, 2, 16, V4L2_PIX_FMT_RGB555 , "RGB555" },
{ 1, 2, 16, V4L2_PIX_FMT_YUYV , "YUV422" },
{ 1, 2, 12, V4L2_PIX_FMT_YVU420 , "YUV420P" }, /* 1.5 ! */
{ 1, 2, 16, V4L2_PIX_FMT_YUV422P , "YUV422P" }
};
/* Function prototypes */
static void usbvision_release(struct usb_usbvision *usbvision);
/* Default initialization of device driver parameters */
/* Set the default format for ISOC endpoint */
static int isoc_mode = ISOC_MODE_COMPRESS;
/* Set the default Debug Mode of the device driver */
static int video_debug;
/* Set the default device to power on at startup */
static int power_on_at_open = 1;
/* Sequential Number of Video Device */
static int video_nr = -1;
/* Sequential Number of Radio Device */
static int radio_nr = -1;
/* Grab parameters for the device driver */
/* Showing parameters under SYSFS */
module_param(isoc_mode, int, 0444);
module_param(video_debug, int, 0444);
module_param(power_on_at_open, int, 0444);
module_param(video_nr, int, 0444);
module_param(radio_nr, int, 0444);
MODULE_PARM_DESC(isoc_mode, " Set the default format for ISOC endpoint. Default: 0x60 (Compression On)");
MODULE_PARM_DESC(video_debug, " Set the default Debug Mode of the device driver. Default: 0 (Off)");
MODULE_PARM_DESC(power_on_at_open, " Set the default device to power on when device is opened. Default: 1 (On)");
MODULE_PARM_DESC(video_nr, "Set video device number (/dev/videoX). Default: -1 (autodetect)");
MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX). Default: -1 (autodetect)");
/* Misc stuff */
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE(DRIVER_LICENSE);
MODULE_VERSION(USBVISION_VERSION_STRING);
MODULE_ALIAS(DRIVER_ALIAS);
/*****************************************************************************/
/* SYSFS Code - Copied from the stv680.c usb module. */
/* Device information is located at /sys/class/video4linux/video0 */
/* Device parameters information is located at /sys/module/usbvision */
/* Device USB Information is located at */
/* /sys/bus/usb/drivers/USBVision Video Grabber */
/*****************************************************************************/
#define YES_NO(x) ((x) ? "Yes" : "No")
static inline struct usb_usbvision *cd_to_usbvision(struct device *cd)
{
struct video_device *vdev =
container_of(cd, struct video_device, dev);
return video_get_drvdata(vdev);
}
static ssize_t show_version(struct device *cd,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%s\n", USBVISION_VERSION_STRING);
}
static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
static ssize_t show_model(struct device *cd,
struct device_attribute *attr, char *buf)
{
struct video_device *vdev =
container_of(cd, struct video_device, dev);
struct usb_usbvision *usbvision = video_get_drvdata(vdev);
return sprintf(buf, "%s\n",
usbvision_device_data[usbvision->dev_model].model_string);
}
static DEVICE_ATTR(model, S_IRUGO, show_model, NULL);
static ssize_t show_hue(struct device *cd,
struct device_attribute *attr, char *buf)
{
struct video_device *vdev =
container_of(cd, struct video_device, dev);
struct usb_usbvision *usbvision = video_get_drvdata(vdev);
struct v4l2_control ctrl;
ctrl.id = V4L2_CID_HUE;
ctrl.value = 0;
if (usbvision->user)
call_all(usbvision, core, g_ctrl, &ctrl);
return sprintf(buf, "%d\n", ctrl.value);
}
static DEVICE_ATTR(hue, S_IRUGO, show_hue, NULL);
static ssize_t show_contrast(struct device *cd,
struct device_attribute *attr, char *buf)
{
struct video_device *vdev =
container_of(cd, struct video_device, dev);
struct usb_usbvision *usbvision = video_get_drvdata(vdev);
struct v4l2_control ctrl;
ctrl.id = V4L2_CID_CONTRAST;
ctrl.value = 0;
if (usbvision->user)
call_all(usbvision, core, g_ctrl, &ctrl);
return sprintf(buf, "%d\n", ctrl.value);
}
static DEVICE_ATTR(contrast, S_IRUGO, show_contrast, NULL);
static ssize_t show_brightness(struct device *cd,
struct device_attribute *attr, char *buf)
{
struct video_device *vdev =
container_of(cd, struct video_device, dev);
struct usb_usbvision *usbvision = video_get_drvdata(vdev);
struct v4l2_control ctrl;
ctrl.id = V4L2_CID_BRIGHTNESS;
ctrl.value = 0;
if (usbvision->user)
call_all(usbvision, core, g_ctrl, &ctrl);
return sprintf(buf, "%d\n", ctrl.value);
}
static DEVICE_ATTR(brightness, S_IRUGO, show_brightness, NULL);
static ssize_t show_saturation(struct device *cd,
struct device_attribute *attr, char *buf)
{
struct video_device *vdev =
container_of(cd, struct video_device, dev);
struct usb_usbvision *usbvision = video_get_drvdata(vdev);
struct v4l2_control ctrl;
ctrl.id = V4L2_CID_SATURATION;
ctrl.value = 0;
if (usbvision->user)
call_all(usbvision, core, g_ctrl, &ctrl);
return sprintf(buf, "%d\n", ctrl.value);
}
static DEVICE_ATTR(saturation, S_IRUGO, show_saturation, NULL);
static ssize_t show_streaming(struct device *cd,
struct device_attribute *attr, char *buf)
{
struct video_device *vdev =
container_of(cd, struct video_device, dev);
struct usb_usbvision *usbvision = video_get_drvdata(vdev);
return sprintf(buf, "%s\n",
YES_NO(usbvision->streaming == stream_on ? 1 : 0));
}
static DEVICE_ATTR(streaming, S_IRUGO, show_streaming, NULL);
static ssize_t show_compression(struct device *cd,
struct device_attribute *attr, char *buf)
{
struct video_device *vdev =
container_of(cd, struct video_device, dev);
struct usb_usbvision *usbvision = video_get_drvdata(vdev);
return sprintf(buf, "%s\n",
YES_NO(usbvision->isoc_mode == ISOC_MODE_COMPRESS));
}
static DEVICE_ATTR(compression, S_IRUGO, show_compression, NULL);
static ssize_t show_device_bridge(struct device *cd,
struct device_attribute *attr, char *buf)
{
struct video_device *vdev =
container_of(cd, struct video_device, dev);
struct usb_usbvision *usbvision = video_get_drvdata(vdev);
return sprintf(buf, "%d\n", usbvision->bridge_type);
}
static DEVICE_ATTR(bridge, S_IRUGO, show_device_bridge, NULL);
static void usbvision_create_sysfs(struct video_device *vdev)
{
int res;
if (!vdev)
return;
do {
res = device_create_file(&vdev->dev, &dev_attr_version);
if (res < 0)
break;
res = device_create_file(&vdev->dev, &dev_attr_model);
if (res < 0)
break;
res = device_create_file(&vdev->dev, &dev_attr_hue);
if (res < 0)
break;
res = device_create_file(&vdev->dev, &dev_attr_contrast);
if (res < 0)
break;
res = device_create_file(&vdev->dev, &dev_attr_brightness);
if (res < 0)
break;
res = device_create_file(&vdev->dev, &dev_attr_saturation);
if (res < 0)
break;
res = device_create_file(&vdev->dev, &dev_attr_streaming);
if (res < 0)
break;
res = device_create_file(&vdev->dev, &dev_attr_compression);
if (res < 0)
break;
res = device_create_file(&vdev->dev, &dev_attr_bridge);
if (res >= 0)
return;
} while (0);
dev_err(&vdev->dev, "%s error: %d\n", __func__, res);
}
static void usbvision_remove_sysfs(struct video_device *vdev)
{
if (vdev) {
device_remove_file(&vdev->dev, &dev_attr_version);
device_remove_file(&vdev->dev, &dev_attr_model);
device_remove_file(&vdev->dev, &dev_attr_hue);
device_remove_file(&vdev->dev, &dev_attr_contrast);
device_remove_file(&vdev->dev, &dev_attr_brightness);
device_remove_file(&vdev->dev, &dev_attr_saturation);
device_remove_file(&vdev->dev, &dev_attr_streaming);
device_remove_file(&vdev->dev, &dev_attr_compression);
device_remove_file(&vdev->dev, &dev_attr_bridge);
}
}
/*
* usbvision_open()
*
* This is part of Video 4 Linux API. The driver can be opened by one
* client only (checks internal counter 'usbvision->user'). The procedure
* then allocates buffers needed for video processing.
*
*/
static int usbvision_v4l2_open(struct file *file)
{
struct usb_usbvision *usbvision = video_drvdata(file);
int err_code = 0;
PDEBUG(DBG_IO, "open");
if (mutex_lock_interruptible(&usbvision->v4l2_lock))
return -ERESTARTSYS;
usbvision_reset_power_off_timer(usbvision);
if (usbvision->user)
err_code = -EBUSY;
else {
/* Allocate memory for the scratch ring buffer */
err_code = usbvision_scratch_alloc(usbvision);
if (isoc_mode == ISOC_MODE_COMPRESS) {
/* Allocate intermediate decompression buffers
only if needed */
err_code = usbvision_decompress_alloc(usbvision);
}
if (err_code) {
/* Deallocate all buffers if trouble */
usbvision_scratch_free(usbvision);
usbvision_decompress_free(usbvision);
}
}
/* If so far no errors then we shall start the camera */
if (!err_code) {
if (usbvision->power == 0) {
usbvision_power_on(usbvision);
usbvision_i2c_register(usbvision);
}
/* Send init sequence only once, it's large! */
if (!usbvision->initialized) {
int setup_ok = 0;
setup_ok = usbvision_setup(usbvision, isoc_mode);
if (setup_ok)
usbvision->initialized = 1;
else
err_code = -EBUSY;
}
if (!err_code) {
usbvision_begin_streaming(usbvision);
err_code = usbvision_init_isoc(usbvision);
/* device must be initialized before isoc transfer */
usbvision_muxsel(usbvision, 0);
usbvision->user++;
} else {
if (power_on_at_open) {
usbvision_i2c_unregister(usbvision);
usbvision_power_off(usbvision);
usbvision->initialized = 0;
}
}
}
/* prepare queues */
usbvision_empty_framequeues(usbvision);
mutex_unlock(&usbvision->v4l2_lock);
PDEBUG(DBG_IO, "success");
return err_code;
}
/*
* usbvision_v4l2_close()
*
* This is part of Video 4 Linux API. The procedure
* stops streaming and deallocates all buffers that were earlier
* allocated in usbvision_v4l2_open().
*
*/
static int usbvision_v4l2_close(struct file *file)
{
struct usb_usbvision *usbvision = video_drvdata(file);
PDEBUG(DBG_IO, "close");
mutex_lock(&usbvision->v4l2_lock);
usbvision_audio_off(usbvision);
usbvision_restart_isoc(usbvision);
usbvision_stop_isoc(usbvision);
usbvision_decompress_free(usbvision);
usbvision_frames_free(usbvision);
usbvision_empty_framequeues(usbvision);
usbvision_scratch_free(usbvision);
usbvision->user--;
if (power_on_at_open) {
/* power off in a little while
to avoid off/on every close/open short sequences */
usbvision_set_power_off_timer(usbvision);
usbvision->initialized = 0;
}
if (usbvision->remove_pending) {
printk(KERN_INFO "%s: Final disconnect\n", __func__);
usbvision_release(usbvision);
return 0;
}
mutex_unlock(&usbvision->v4l2_lock);
PDEBUG(DBG_IO, "success");
return 0;
}
/*
* usbvision_ioctl()
*
* This is part of Video 4 Linux API. The procedure handles ioctl() calls.
*
*/
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int vidioc_g_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg)
{
struct usb_usbvision *usbvision = video_drvdata(file);
int err_code;
/* NT100x has a 8-bit register space */
err_code = usbvision_read_reg(usbvision, reg->reg&0xff);
if (err_code < 0) {
dev_err(&usbvision->vdev->dev,
"%s: VIDIOC_DBG_G_REGISTER failed: error %d\n",
__func__, err_code);
return err_code;
}
reg->val = err_code;
reg->size = 1;
return 0;
}
static int vidioc_s_register(struct file *file, void *priv,
const struct v4l2_dbg_register *reg)
{
struct usb_usbvision *usbvision = video_drvdata(file);
int err_code;
/* NT100x has a 8-bit register space */
err_code = usbvision_write_reg(usbvision, reg->reg & 0xff, reg->val);
if (err_code < 0) {
dev_err(&usbvision->vdev->dev,
"%s: VIDIOC_DBG_S_REGISTER failed: error %d\n",
__func__, err_code);
return err_code;
}
return 0;
}
#endif
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *vc)
{
struct usb_usbvision *usbvision = video_drvdata(file);
strlcpy(vc->driver, "USBVision", sizeof(vc->driver));
strlcpy(vc->card,
usbvision_device_data[usbvision->dev_model].model_string,
sizeof(vc->card));
usb_make_path(usbvision->dev, vc->bus_info, sizeof(vc->bus_info));
vc->device_caps = V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_AUDIO |
V4L2_CAP_READWRITE |
V4L2_CAP_STREAMING |
(usbvision->have_tuner ? V4L2_CAP_TUNER : 0);
vc->capabilities = vc->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *vi)
{
struct usb_usbvision *usbvision = video_drvdata(file);
int chan;
if (vi->index >= usbvision->video_inputs)
return -EINVAL;
if (usbvision->have_tuner)
chan = vi->index;
else
chan = vi->index + 1; /* skip Television string*/
/* Determine the requested input characteristics
specific for each usbvision card model */
switch (chan) {
case 0:
if (usbvision_device_data[usbvision->dev_model].video_channels == 4) {
strcpy(vi->name, "White Video Input");
} else {
strcpy(vi->name, "Television");
vi->type = V4L2_INPUT_TYPE_TUNER;
vi->audioset = 1;
vi->tuner = chan;
vi->std = USBVISION_NORMS;
}
break;
case 1:
vi->type = V4L2_INPUT_TYPE_CAMERA;
if (usbvision_device_data[usbvision->dev_model].video_channels == 4)
strcpy(vi->name, "Green Video Input");
else
strcpy(vi->name, "Composite Video Input");
vi->std = V4L2_STD_PAL;
break;
case 2:
vi->type = V4L2_INPUT_TYPE_CAMERA;
if (usbvision_device_data[usbvision->dev_model].video_channels == 4)
strcpy(vi->name, "Yellow Video Input");
else
strcpy(vi->name, "S-Video Input");
vi->std = V4L2_STD_PAL;
break;
case 3:
vi->type = V4L2_INPUT_TYPE_CAMERA;
strcpy(vi->name, "Red Video Input");
vi->std = V4L2_STD_PAL;
break;
}
return 0;
}
static int vidioc_g_input(struct file *file, void *priv, unsigned int *input)
{
struct usb_usbvision *usbvision = video_drvdata(file);
*input = usbvision->ctl_input;
return 0;
}
static int vidioc_s_input(struct file *file, void *priv, unsigned int input)
{
struct usb_usbvision *usbvision = video_drvdata(file);
if (input >= usbvision->video_inputs)
return -EINVAL;
usbvision_muxsel(usbvision, input);
usbvision_set_input(usbvision);
usbvision_set_output(usbvision,
usbvision->curwidth,
usbvision->curheight);
return 0;
}
static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
{
struct usb_usbvision *usbvision = video_drvdata(file);
usbvision->tvnorm_id = id;
call_all(usbvision, video, s_std, usbvision->tvnorm_id);
/* propagate the change to the decoder */
usbvision_muxsel(usbvision, usbvision->ctl_input);
return 0;
}
static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
{
struct usb_usbvision *usbvision = video_drvdata(file);
*id = usbvision->tvnorm_id;
return 0;
}
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *vt)
{
struct usb_usbvision *usbvision = video_drvdata(file);
if (!usbvision->have_tuner || vt->index) /* Only tuner 0 */
return -EINVAL;
if (usbvision->radio) {
strcpy(vt->name, "Radio");
vt->type = V4L2_TUNER_RADIO;
} else {
strcpy(vt->name, "Television");
}
/* Let clients fill in the remainder of this struct */
call_all(usbvision, tuner, g_tuner, vt);
return 0;
}
static int vidioc_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *vt)
{
struct usb_usbvision *usbvision = video_drvdata(file);
/* Only no or one tuner for now */
if (!usbvision->have_tuner || vt->index)
return -EINVAL;
/* let clients handle this */
call_all(usbvision, tuner, s_tuner, vt);
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *freq)
{
struct usb_usbvision *usbvision = video_drvdata(file);
freq->tuner = 0; /* Only one tuner */
if (usbvision->radio)
freq->type = V4L2_TUNER_RADIO;
else
freq->type = V4L2_TUNER_ANALOG_TV;
freq->frequency = usbvision->freq;
return 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *freq)
{
struct usb_usbvision *usbvision = video_drvdata(file);
/* Only no or one tuner for now */
if (!usbvision->have_tuner || freq->tuner)
return -EINVAL;
usbvision->freq = freq->frequency;
call_all(usbvision, tuner, s_frequency, freq);
return 0;
}
static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
{
struct usb_usbvision *usbvision = video_drvdata(file);
if (usbvision->radio)
strcpy(a->name, "Radio");
else
strcpy(a->name, "TV");
return 0;
}
static int vidioc_s_audio(struct file *file, void *fh,
const struct v4l2_audio *a)
{
if (a->index)
return -EINVAL;
return 0;
}
static int vidioc_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *ctrl)
{
struct usb_usbvision *usbvision = video_drvdata(file);
call_all(usbvision, core, queryctrl, ctrl);
if (!ctrl->type)
return -EINVAL;
return 0;
}
static int vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct usb_usbvision *usbvision = video_drvdata(file);
call_all(usbvision, core, g_ctrl, ctrl);
return 0;
}
static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct usb_usbvision *usbvision = video_drvdata(file);
call_all(usbvision, core, s_ctrl, ctrl);
return 0;
}
static int vidioc_reqbufs(struct file *file,
void *priv, struct v4l2_requestbuffers *vr)
{
struct usb_usbvision *usbvision = video_drvdata(file);
int ret;
RESTRICT_TO_RANGE(vr->count, 1, USBVISION_NUMFRAMES);
/* Check input validity:
the user must do a VIDEO CAPTURE and MMAP method. */
if (vr->memory != V4L2_MEMORY_MMAP)
return -EINVAL;
if (usbvision->streaming == stream_on) {
ret = usbvision_stream_interrupt(usbvision);
if (ret)
return ret;
}
usbvision_frames_free(usbvision);
usbvision_empty_framequeues(usbvision);
vr->count = usbvision_frames_alloc(usbvision, vr->count);
usbvision->cur_frame = NULL;
return 0;
}
static int vidioc_querybuf(struct file *file,
void *priv, struct v4l2_buffer *vb)
{
struct usb_usbvision *usbvision = video_drvdata(file);
struct usbvision_frame *frame;
/* FIXME : must control
that buffers are mapped (VIDIOC_REQBUFS has been called) */
if (vb->index >= usbvision->num_frames)
return -EINVAL;
/* Updating the corresponding frame state */
vb->flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
frame = &usbvision->frame[vb->index];
if (frame->grabstate >= frame_state_ready)
vb->flags |= V4L2_BUF_FLAG_QUEUED;
if (frame->grabstate >= frame_state_done)
vb->flags |= V4L2_BUF_FLAG_DONE;
if (frame->grabstate == frame_state_unused)
vb->flags |= V4L2_BUF_FLAG_MAPPED;
vb->memory = V4L2_MEMORY_MMAP;
vb->m.offset = vb->index * PAGE_ALIGN(usbvision->max_frame_size);
vb->memory = V4L2_MEMORY_MMAP;
vb->field = V4L2_FIELD_NONE;
vb->length = usbvision->curwidth *
usbvision->curheight *
usbvision->palette.bytes_per_pixel;
vb->timestamp = usbvision->frame[vb->index].timestamp;
vb->sequence = usbvision->frame[vb->index].sequence;
return 0;
}
static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *vb)
{
struct usb_usbvision *usbvision = video_drvdata(file);
struct usbvision_frame *frame;
unsigned long lock_flags;
/* FIXME : works only on VIDEO_CAPTURE MODE, MMAP. */
if (vb->index >= usbvision->num_frames)
return -EINVAL;
frame = &usbvision->frame[vb->index];
if (frame->grabstate != frame_state_unused)
return -EAGAIN;
/* Mark it as ready and enqueue frame */
frame->grabstate = frame_state_ready;
frame->scanstate = scan_state_scanning;
frame->scanlength = 0; /* Accumulated in usbvision_parse_data() */
vb->flags &= ~V4L2_BUF_FLAG_DONE;
/* set v4l2_format index */
frame->v4l2_format = usbvision->palette;
spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
list_add_tail(&usbvision->frame[vb->index].frame, &usbvision->inqueue);
spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
return 0;
}
static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *vb)
{
struct usb_usbvision *usbvision = video_drvdata(file);
int ret;
struct usbvision_frame *f;
unsigned long lock_flags;
if (list_empty(&(usbvision->outqueue))) {
if (usbvision->streaming == stream_idle)
return -EINVAL;
ret = wait_event_interruptible
(usbvision->wait_frame,
!list_empty(&(usbvision->outqueue)));
if (ret)
return ret;
}
spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
f = list_entry(usbvision->outqueue.next,
struct usbvision_frame, frame);
list_del(usbvision->outqueue.next);
spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
f->grabstate = frame_state_unused;
vb->memory = V4L2_MEMORY_MMAP;
vb->flags = V4L2_BUF_FLAG_MAPPED |
V4L2_BUF_FLAG_QUEUED |
V4L2_BUF_FLAG_DONE |
V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
vb->index = f->index;
vb->sequence = f->sequence;
vb->timestamp = f->timestamp;
vb->field = V4L2_FIELD_NONE;
vb->bytesused = f->scanlength;
return 0;
}
static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
{
struct usb_usbvision *usbvision = video_drvdata(file);
usbvision->streaming = stream_on;
call_all(usbvision, video, s_stream, 1);
return 0;
}
static int vidioc_streamoff(struct file *file,
void *priv, enum v4l2_buf_type type)
{
struct usb_usbvision *usbvision = video_drvdata(file);
if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (usbvision->streaming == stream_on) {
usbvision_stream_interrupt(usbvision);
/* Stop all video streamings */
call_all(usbvision, video, s_stream, 0);
}
usbvision_empty_framequeues(usbvision);
return 0;
}
static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *vfd)
{
if (vfd->index >= USBVISION_SUPPORTED_PALETTES - 1)
return -EINVAL;
strcpy(vfd->description, usbvision_v4l2_format[vfd->index].desc);
vfd->pixelformat = usbvision_v4l2_format[vfd->index].format;
return 0;
}
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *vf)
{
struct usb_usbvision *usbvision = video_drvdata(file);
vf->fmt.pix.width = usbvision->curwidth;
vf->fmt.pix.height = usbvision->curheight;
vf->fmt.pix.pixelformat = usbvision->palette.format;
vf->fmt.pix.bytesperline =
usbvision->curwidth * usbvision->palette.bytes_per_pixel;
vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline * usbvision->curheight;
vf->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
vf->fmt.pix.field = V4L2_FIELD_NONE; /* Always progressive image */
return 0;
}
static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *vf)
{
struct usb_usbvision *usbvision = video_drvdata(file);
int format_idx;
/* Find requested format in available ones */
for (format_idx = 0; format_idx < USBVISION_SUPPORTED_PALETTES; format_idx++) {
if (vf->fmt.pix.pixelformat ==
usbvision_v4l2_format[format_idx].format) {
usbvision->palette = usbvision_v4l2_format[format_idx];
break;
}
}
/* robustness */
if (format_idx == USBVISION_SUPPORTED_PALETTES)
return -EINVAL;
RESTRICT_TO_RANGE(vf->fmt.pix.width, MIN_FRAME_WIDTH, MAX_FRAME_WIDTH);
RESTRICT_TO_RANGE(vf->fmt.pix.height, MIN_FRAME_HEIGHT, MAX_FRAME_HEIGHT);
vf->fmt.pix.bytesperline = vf->fmt.pix.width*
usbvision->palette.bytes_per_pixel;
vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline*vf->fmt.pix.height;
return 0;
}
static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *vf)
{
struct usb_usbvision *usbvision = video_drvdata(file);
int ret;
ret = vidioc_try_fmt_vid_cap(file, priv, vf);
if (ret)
return ret;
/* stop io in case it is already in progress */
if (usbvision->streaming == stream_on) {
ret = usbvision_stream_interrupt(usbvision);
if (ret)
return ret;
}
usbvision_frames_free(usbvision);
usbvision_empty_framequeues(usbvision);
usbvision->cur_frame = NULL;
/* by now we are committed to the new data... */
usbvision_set_output(usbvision, vf->fmt.pix.width, vf->fmt.pix.height);
return 0;
}
static ssize_t usbvision_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct usb_usbvision *usbvision = video_drvdata(file);
int noblock = file->f_flags & O_NONBLOCK;
unsigned long lock_flags;
int ret, i;
struct usbvision_frame *frame;
PDEBUG(DBG_IO, "%s: %ld bytes, noblock=%d", __func__,
(unsigned long)count, noblock);
if (!USBVISION_IS_OPERATIONAL(usbvision) || (buf == NULL))
return -EFAULT;
/* This entry point is compatible with the mmap routines
so that a user can do either VIDIOC_QBUF/VIDIOC_DQBUF
to get frames or call read on the device. */
if (!usbvision->num_frames) {
/* First, allocate some frames to work with
if this has not been done with VIDIOC_REQBUF */
usbvision_frames_free(usbvision);
usbvision_empty_framequeues(usbvision);
usbvision_frames_alloc(usbvision, USBVISION_NUMFRAMES);
}
if (usbvision->streaming != stream_on) {
/* no stream is running, make it running ! */
usbvision->streaming = stream_on;
call_all(usbvision, video, s_stream, 1);
}
/* Then, enqueue as many frames as possible
(like a user of VIDIOC_QBUF would do) */
for (i = 0; i < usbvision->num_frames; i++) {
frame = &usbvision->frame[i];
if (frame->grabstate == frame_state_unused) {
/* Mark it as ready and enqueue frame */
frame->grabstate = frame_state_ready;
frame->scanstate = scan_state_scanning;
/* Accumulated in usbvision_parse_data() */
frame->scanlength = 0;
/* set v4l2_format index */
frame->v4l2_format = usbvision->palette;
spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
list_add_tail(&frame->frame, &usbvision->inqueue);
spin_unlock_irqrestore(&usbvision->queue_lock,
lock_flags);
}
}
/* Then try to steal a frame (like a VIDIOC_DQBUF would do) */
if (list_empty(&(usbvision->outqueue))) {
if (noblock)
return -EAGAIN;
ret = wait_event_interruptible
(usbvision->wait_frame,
!list_empty(&(usbvision->outqueue)));
if (ret)
return ret;
}
spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
frame = list_entry(usbvision->outqueue.next,
struct usbvision_frame, frame);
list_del(usbvision->outqueue.next);
spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
/* An error returns an empty frame */
if (frame->grabstate == frame_state_error) {
frame->bytes_read = 0;
return 0;
}
PDEBUG(DBG_IO, "%s: frmx=%d, bytes_read=%ld, scanlength=%ld",
__func__,
frame->index, frame->bytes_read, frame->scanlength);
/* copy bytes to user space; we allow for partials reads */
if ((count + frame->bytes_read) > (unsigned long)frame->scanlength)
count = frame->scanlength - frame->bytes_read;
if (copy_to_user(buf, frame->data + frame->bytes_read, count))
return -EFAULT;
frame->bytes_read += count;
PDEBUG(DBG_IO, "%s: {copy} count used=%ld, new bytes_read=%ld",
__func__,
(unsigned long)count, frame->bytes_read);
/* For now, forget the frame if it has not been read in one shot. */
/* if (frame->bytes_read >= frame->scanlength) {*/ /* All data has been read */
frame->bytes_read = 0;
/* Mark it as available to be used again. */
frame->grabstate = frame_state_unused;
/* } */
return count;
}
static ssize_t usbvision_v4l2_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct usb_usbvision *usbvision = video_drvdata(file);
int res;
if (mutex_lock_interruptible(&usbvision->v4l2_lock))
return -ERESTARTSYS;
res = usbvision_read(file, buf, count, ppos);
mutex_unlock(&usbvision->v4l2_lock);
return res;
}
static int usbvision_mmap(struct file *file, struct vm_area_struct *vma)
{
unsigned long size = vma->vm_end - vma->vm_start,
start = vma->vm_start;
void *pos;
u32 i;
struct usb_usbvision *usbvision = video_drvdata(file);
PDEBUG(DBG_MMAP, "mmap");
if (!USBVISION_IS_OPERATIONAL(usbvision))
return -EFAULT;
if (!(vma->vm_flags & VM_WRITE) ||
size != PAGE_ALIGN(usbvision->max_frame_size)) {
return -EINVAL;
}
for (i = 0; i < usbvision->num_frames; i++) {
if (((PAGE_ALIGN(usbvision->max_frame_size)*i) >> PAGE_SHIFT) ==
vma->vm_pgoff)
break;
}
if (i == usbvision->num_frames) {
PDEBUG(DBG_MMAP,
"mmap: user supplied mapping address is out of range");
return -EINVAL;
}
/* VM_IO is eventually going to replace PageReserved altogether */
vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
pos = usbvision->frame[i].data;
while (size > 0) {
if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
PDEBUG(DBG_MMAP, "mmap: vm_insert_page failed");
return -EAGAIN;
}
start += PAGE_SIZE;
pos += PAGE_SIZE;
size -= PAGE_SIZE;
}
return 0;
}
static int usbvision_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
{
struct usb_usbvision *usbvision = video_drvdata(file);
int res;
if (mutex_lock_interruptible(&usbvision->v4l2_lock))
return -ERESTARTSYS;
res = usbvision_mmap(file, vma);
mutex_unlock(&usbvision->v4l2_lock);
return res;
}
/*
* Here comes the stuff for radio on usbvision based devices
*
*/
static int usbvision_radio_open(struct file *file)
{
struct usb_usbvision *usbvision = video_drvdata(file);
int err_code = 0;
PDEBUG(DBG_IO, "%s:", __func__);
if (mutex_lock_interruptible(&usbvision->v4l2_lock))
return -ERESTARTSYS;
if (usbvision->user) {
dev_err(&usbvision->rdev->dev,
"%s: Someone tried to open an already opened USBVision Radio!\n",
__func__);
err_code = -EBUSY;
} else {
if (power_on_at_open) {
usbvision_reset_power_off_timer(usbvision);
if (usbvision->power == 0) {
usbvision_power_on(usbvision);
usbvision_i2c_register(usbvision);
}
}
/* Alternate interface 1 is is the biggest frame size */
err_code = usbvision_set_alternate(usbvision);
if (err_code < 0) {
usbvision->last_error = err_code;
err_code = -EBUSY;
goto out;
}
/* If so far no errors then we shall start the radio */
usbvision->radio = 1;
call_all(usbvision, tuner, s_radio);
usbvision_set_audio(usbvision, USBVISION_AUDIO_RADIO);
usbvision->user++;
}
if (err_code) {
if (power_on_at_open) {
usbvision_i2c_unregister(usbvision);
usbvision_power_off(usbvision);
usbvision->initialized = 0;
}
}
out:
mutex_unlock(&usbvision->v4l2_lock);
return err_code;
}
static int usbvision_radio_close(struct file *file)
{
struct usb_usbvision *usbvision = video_drvdata(file);
int err_code = 0;
PDEBUG(DBG_IO, "");
mutex_lock(&usbvision->v4l2_lock);
/* Set packet size to 0 */
usbvision->iface_alt = 0;
err_code = usb_set_interface(usbvision->dev, usbvision->iface,
usbvision->iface_alt);
usbvision_audio_off(usbvision);
usbvision->radio = 0;
usbvision->user--;
if (power_on_at_open) {
usbvision_set_power_off_timer(usbvision);
usbvision->initialized = 0;
}
if (usbvision->remove_pending) {
printk(KERN_INFO "%s: Final disconnect\n", __func__);
usbvision_release(usbvision);
return err_code;
}
mutex_unlock(&usbvision->v4l2_lock);
PDEBUG(DBG_IO, "success");
return err_code;
}
/* Video registration stuff */
/* Video template */
static const struct v4l2_file_operations usbvision_fops = {
.owner = THIS_MODULE,
.open = usbvision_v4l2_open,
.release = usbvision_v4l2_close,
.read = usbvision_v4l2_read,
.mmap = usbvision_v4l2_mmap,
.unlocked_ioctl = video_ioctl2,
/* .poll = video_poll, */
};
static const struct v4l2_ioctl_ops usbvision_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
.vidioc_reqbufs = vidioc_reqbufs,
.vidioc_querybuf = vidioc_querybuf,
.vidioc_qbuf = vidioc_qbuf,
.vidioc_dqbuf = vidioc_dqbuf,
.vidioc_s_std = vidioc_s_std,
.vidioc_g_std = vidioc_g_std,
.vidioc_enum_input = vidioc_enum_input,
.vidioc_g_input = vidioc_g_input,
.vidioc_s_input = vidioc_s_input,
.vidioc_queryctrl = vidioc_queryctrl,
.vidioc_g_audio = vidioc_g_audio,
.vidioc_s_audio = vidioc_s_audio,
.vidioc_g_ctrl = vidioc_g_ctrl,
.vidioc_s_ctrl = vidioc_s_ctrl,
.vidioc_streamon = vidioc_streamon,
.vidioc_streamoff = vidioc_streamoff,
.vidioc_g_tuner = vidioc_g_tuner,
.vidioc_s_tuner = vidioc_s_tuner,
.vidioc_g_frequency = vidioc_g_frequency,
.vidioc_s_frequency = vidioc_s_frequency,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.vidioc_g_register = vidioc_g_register,
.vidioc_s_register = vidioc_s_register,
#endif
};
static struct video_device usbvision_video_template = {
.fops = &usbvision_fops,
.ioctl_ops = &usbvision_ioctl_ops,
.name = "usbvision-video",
.release = video_device_release,
.tvnorms = USBVISION_NORMS,
};
/* Radio template */
static const struct v4l2_file_operations usbvision_radio_fops = {
.owner = THIS_MODULE,
.open = usbvision_radio_open,
.release = usbvision_radio_close,
.unlocked_ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops usbvision_radio_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
.vidioc_enum_input = vidioc_enum_input,
.vidioc_g_input = vidioc_g_input,
.vidioc_s_input = vidioc_s_input,
.vidioc_queryctrl = vidioc_queryctrl,
.vidioc_g_audio = vidioc_g_audio,
.vidioc_s_audio = vidioc_s_audio,
.vidioc_g_ctrl = vidioc_g_ctrl,
.vidioc_s_ctrl = vidioc_s_ctrl,
.vidioc_g_tuner = vidioc_g_tuner,
.vidioc_s_tuner = vidioc_s_tuner,
.vidioc_g_frequency = vidioc_g_frequency,
.vidioc_s_frequency = vidioc_s_frequency,
};
static struct video_device usbvision_radio_template = {
.fops = &usbvision_radio_fops,
.name = "usbvision-radio",
.release = video_device_release,
.ioctl_ops = &usbvision_radio_ioctl_ops,
};
static struct video_device *usbvision_vdev_init(struct usb_usbvision *usbvision,
struct video_device *vdev_template,
char *name)
{
struct usb_device *usb_dev = usbvision->dev;
struct video_device *vdev;
if (usb_dev == NULL) {
dev_err(&usbvision->dev->dev,
"%s: usbvision->dev is not set\n", __func__);
return NULL;
}
vdev = video_device_alloc();
if (NULL == vdev)
return NULL;
*vdev = *vdev_template;
vdev->lock = &usbvision->v4l2_lock;
vdev->v4l2_dev = &usbvision->v4l2_dev;
snprintf(vdev->name, sizeof(vdev->name), "%s", name);
video_set_drvdata(vdev, usbvision);
return vdev;
}
/* unregister video4linux devices */
static void usbvision_unregister_video(struct usb_usbvision *usbvision)
{
/* Radio Device: */
if (usbvision->rdev) {
PDEBUG(DBG_PROBE, "unregister %s [v4l2]",
video_device_node_name(usbvision->rdev));
if (video_is_registered(usbvision->rdev))
video_unregister_device(usbvision->rdev);
else
video_device_release(usbvision->rdev);
usbvision->rdev = NULL;
}
/* Video Device: */
if (usbvision->vdev) {
PDEBUG(DBG_PROBE, "unregister %s [v4l2]",
video_device_node_name(usbvision->vdev));
if (video_is_registered(usbvision->vdev))
video_unregister_device(usbvision->vdev);
else
video_device_release(usbvision->vdev);
usbvision->vdev = NULL;
}
}
/* register video4linux devices */
static int usbvision_register_video(struct usb_usbvision *usbvision)
{
/* Video Device: */
usbvision->vdev = usbvision_vdev_init(usbvision,
&usbvision_video_template,
"USBVision Video");
if (usbvision->vdev == NULL)
goto err_exit;
if (video_register_device(usbvision->vdev, VFL_TYPE_GRABBER, video_nr) < 0)
goto err_exit;
printk(KERN_INFO "USBVision[%d]: registered USBVision Video device %s [v4l2]\n",
usbvision->nr, video_device_node_name(usbvision->vdev));
/* Radio Device: */
if (usbvision_device_data[usbvision->dev_model].radio) {
/* usbvision has radio */
usbvision->rdev = usbvision_vdev_init(usbvision,
&usbvision_radio_template,
"USBVision Radio");
if (usbvision->rdev == NULL)
goto err_exit;
if (video_register_device(usbvision->rdev, VFL_TYPE_RADIO, radio_nr) < 0)
goto err_exit;
printk(KERN_INFO "USBVision[%d]: registered USBVision Radio device %s [v4l2]\n",
usbvision->nr, video_device_node_name(usbvision->rdev));
}
/* all done */
return 0;
err_exit:
dev_err(&usbvision->dev->dev,
"USBVision[%d]: video_register_device() failed\n",
usbvision->nr);
usbvision_unregister_video(usbvision);
return -1;
}
/*
* usbvision_alloc()
*
* This code allocates the struct usb_usbvision.
* It is filled with default values.
*
* Returns NULL on error, a pointer to usb_usbvision else.
*
*/
static struct usb_usbvision *usbvision_alloc(struct usb_device *dev,
struct usb_interface *intf)
{
struct usb_usbvision *usbvision;
usbvision = kzalloc(sizeof(struct usb_usbvision), GFP_KERNEL);
if (usbvision == NULL)
return NULL;
usbvision->dev = dev;
if (v4l2_device_register(&intf->dev, &usbvision->v4l2_dev))
goto err_free;
mutex_init(&usbvision->v4l2_lock);
/* prepare control urb for control messages during interrupts */
usbvision->ctrl_urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
if (usbvision->ctrl_urb == NULL)
goto err_unreg;
init_waitqueue_head(&usbvision->ctrl_urb_wq);
usbvision_init_power_off_timer(usbvision);
return usbvision;
err_unreg:
v4l2_device_unregister(&usbvision->v4l2_dev);
err_free:
kfree(usbvision);
return NULL;
}
/*
* usbvision_release()
*
* This code does final release of struct usb_usbvision. This happens
* after the device is disconnected -and- all clients closed their files.
*
*/
static void usbvision_release(struct usb_usbvision *usbvision)
{
PDEBUG(DBG_PROBE, "");
usbvision_reset_power_off_timer(usbvision);
usbvision->initialized = 0;
usbvision_remove_sysfs(usbvision->vdev);
usbvision_unregister_video(usbvision);
kfree(usbvision->alt_max_pkt_size);
usb_free_urb(usbvision->ctrl_urb);
v4l2_device_unregister(&usbvision->v4l2_dev);
kfree(usbvision);
PDEBUG(DBG_PROBE, "success");
}
/*********************** usb interface **********************************/
static void usbvision_configure_video(struct usb_usbvision *usbvision)
{
int model;
if (usbvision == NULL)
return;
model = usbvision->dev_model;
usbvision->palette = usbvision_v4l2_format[2]; /* V4L2_PIX_FMT_RGB24; */
if (usbvision_device_data[usbvision->dev_model].vin_reg2_override) {
usbvision->vin_reg2_preset =
usbvision_device_data[usbvision->dev_model].vin_reg2;
} else {
usbvision->vin_reg2_preset = 0;
}
usbvision->tvnorm_id = usbvision_device_data[model].video_norm;
usbvision->video_inputs = usbvision_device_data[model].video_channels;
usbvision->ctl_input = 0;
/* This should be here to make i2c clients to be able to register */
/* first switch off audio */
if (usbvision_device_data[model].audio_channels > 0)
usbvision_audio_off(usbvision);
if (!power_on_at_open) {
/* and then power up the noisy tuner */
usbvision_power_on(usbvision);
usbvision_i2c_register(usbvision);
}
}
/*
* usbvision_probe()
*
* This procedure queries device descriptor and accepts the interface
* if it looks like USBVISION video device
*
*/
static int usbvision_probe(struct usb_interface *intf,
const struct usb_device_id *devid)
{
struct usb_device *dev = usb_get_dev(interface_to_usbdev(intf));
struct usb_interface *uif;
__u8 ifnum = intf->altsetting->desc.bInterfaceNumber;
const struct usb_host_interface *interface;
struct usb_usbvision *usbvision = NULL;
const struct usb_endpoint_descriptor *endpoint;
int model, i;
PDEBUG(DBG_PROBE, "VID=%#04x, PID=%#04x, ifnum=%u",
dev->descriptor.idVendor,
dev->descriptor.idProduct, ifnum);
model = devid->driver_info;
if (model < 0 || model >= usbvision_device_data_size) {
PDEBUG(DBG_PROBE, "model out of bounds %d", model);
return -ENODEV;
}
printk(KERN_INFO "%s: %s found\n", __func__,
usbvision_device_data[model].model_string);
if (usbvision_device_data[model].interface >= 0)
interface = &dev->actconfig->interface[usbvision_device_data[model].interface]->altsetting[0];
else
interface = &dev->actconfig->interface[ifnum]->altsetting[0];
endpoint = &interface->endpoint[1].desc;
if (!usb_endpoint_xfer_isoc(endpoint)) {
dev_err(&intf->dev, "%s: interface %d. has non-ISO endpoint!\n",
__func__, ifnum);
dev_err(&intf->dev, "%s: Endpoint attributes %d",
__func__, endpoint->bmAttributes);
return -ENODEV;
}
if (usb_endpoint_dir_out(endpoint)) {
dev_err(&intf->dev, "%s: interface %d. has ISO OUT endpoint!\n",
__func__, ifnum);
return -ENODEV;
}
usbvision = usbvision_alloc(dev, intf);
if (usbvision == NULL) {
dev_err(&intf->dev, "%s: couldn't allocate USBVision struct\n", __func__);
return -ENOMEM;
}
if (dev->descriptor.bNumConfigurations > 1)
usbvision->bridge_type = BRIDGE_NT1004;
else if (model == DAZZLE_DVC_90_REV_1_SECAM)
usbvision->bridge_type = BRIDGE_NT1005;
else
usbvision->bridge_type = BRIDGE_NT1003;
PDEBUG(DBG_PROBE, "bridge_type %d", usbvision->bridge_type);
/* compute alternate max packet sizes */
uif = dev->actconfig->interface[0];
usbvision->num_alt = uif->num_altsetting;
PDEBUG(DBG_PROBE, "Alternate settings: %i", usbvision->num_alt);
usbvision->alt_max_pkt_size = kmalloc(32 * usbvision->num_alt, GFP_KERNEL);
if (usbvision->alt_max_pkt_size == NULL) {
dev_err(&intf->dev, "usbvision: out of memory!\n");
usbvision_release(usbvision);
return -ENOMEM;
}
for (i = 0; i < usbvision->num_alt; i++) {
u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
wMaxPacketSize);
usbvision->alt_max_pkt_size[i] =
(tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
PDEBUG(DBG_PROBE, "Alternate setting %i, max size= %i", i,
usbvision->alt_max_pkt_size[i]);
}
usbvision->nr = usbvision_nr++;
usbvision->have_tuner = usbvision_device_data[model].tuner;
if (usbvision->have_tuner)
usbvision->tuner_type = usbvision_device_data[model].tuner_type;
usbvision->dev_model = model;
usbvision->remove_pending = 0;
usbvision->iface = ifnum;
usbvision->iface_alt = 0;
usbvision->video_endp = endpoint->bEndpointAddress;
usbvision->isoc_packet_size = 0;
usbvision->usb_bandwidth = 0;
usbvision->user = 0;
usbvision->streaming = stream_off;
usbvision_configure_video(usbvision);
usbvision_register_video(usbvision);
usbvision_create_sysfs(usbvision->vdev);
PDEBUG(DBG_PROBE, "success");
return 0;
}
/*
* usbvision_disconnect()
*
* This procedure stops all driver activity, deallocates interface-private
* structure (pointed by 'ptr') and after that driver should be removable
* with no ill consequences.
*
*/
static void usbvision_disconnect(struct usb_interface *intf)
{
struct usb_usbvision *usbvision = to_usbvision(usb_get_intfdata(intf));
PDEBUG(DBG_PROBE, "");
if (usbvision == NULL) {
pr_err("%s: usb_get_intfdata() failed\n", __func__);
return;
}
mutex_lock(&usbvision->v4l2_lock);
/* At this time we ask to cancel outstanding URBs */
usbvision_stop_isoc(usbvision);
v4l2_device_disconnect(&usbvision->v4l2_dev);
if (usbvision->power) {
usbvision_i2c_unregister(usbvision);
usbvision_power_off(usbvision);
}
usbvision->remove_pending = 1; /* Now all ISO data will be ignored */
usb_put_dev(usbvision->dev);
usbvision->dev = NULL; /* USB device is no more */
mutex_unlock(&usbvision->v4l2_lock);
if (usbvision->user) {
printk(KERN_INFO "%s: In use, disconnect pending\n",
__func__);
wake_up_interruptible(&usbvision->wait_frame);
wake_up_interruptible(&usbvision->wait_stream);
} else {
usbvision_release(usbvision);
}
PDEBUG(DBG_PROBE, "success");
}
static struct usb_driver usbvision_driver = {
.name = "usbvision",
.id_table = usbvision_table,
.probe = usbvision_probe,
.disconnect = usbvision_disconnect,
};
/*
* usbvision_init()
*
* This code is run to initialize the driver.
*
*/
static int __init usbvision_init(void)
{
int err_code;
PDEBUG(DBG_PROBE, "");
PDEBUG(DBG_IO, "IO debugging is enabled [video]");
PDEBUG(DBG_PROBE, "PROBE debugging is enabled [video]");
PDEBUG(DBG_MMAP, "MMAP debugging is enabled [video]");
/* disable planar mode support unless compression enabled */
if (isoc_mode != ISOC_MODE_COMPRESS) {
/* FIXME : not the right way to set supported flag */
usbvision_v4l2_format[6].supported = 0; /* V4L2_PIX_FMT_YVU420 */
usbvision_v4l2_format[7].supported = 0; /* V4L2_PIX_FMT_YUV422P */
}
err_code = usb_register(&usbvision_driver);
if (err_code == 0) {
printk(KERN_INFO DRIVER_DESC " : " USBVISION_VERSION_STRING "\n");
PDEBUG(DBG_PROBE, "success");
}
return err_code;
}
static void __exit usbvision_exit(void)
{
PDEBUG(DBG_PROBE, "");
usb_deregister(&usbvision_driver);
PDEBUG(DBG_PROBE, "success");
}
module_init(usbvision_init);
module_exit(usbvision_exit);
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* ---------------------------------------------------------------------------
* Local variables:
* c-basic-offset: 8
* End:
*/