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linux/drivers/media/video/zr364xx.c

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/*
* Zoran 364xx based USB webcam module version 0.72
*
* Allows you to use your USB webcam with V4L2 applications
* This is still in heavy developpement !
*
* Copyright (C) 2004 Antoine Jacquet <royale@zerezo.com>
* http://royale.zerezo.com/zr364xx/
*
* Heavily inspired by usb-skeleton.c, vicam.c, cpia.c and spca50x.c drivers
* V4L2 version inspired by meye.c driver
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/version.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/usb.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/highmem.h>
#include <media/v4l2-common.h>
/* Version Information */
#define DRIVER_VERSION "v0.72"
#define DRIVER_AUTHOR "Antoine Jacquet, http://royale.zerezo.com/"
#define DRIVER_DESC "Zoran 364xx"
/* Camera */
#define FRAMES 2
#define MAX_FRAME_SIZE 100000
#define BUFFER_SIZE 0x1000
#define CTRL_TIMEOUT 500
/* Debug macro */
#define DBG(x...) if (debug) info(x)
/* Init methods, need to find nicer names for these
* the exact names of the chipsets would be the best if someone finds it */
#define METHOD0 0
#define METHOD1 1
#define METHOD2 2
/* Module parameters */
static int debug = 0;
static int mode = 0;
/* Module parameters interface */
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Debug level");
module_param(mode, int, 0644);
MODULE_PARM_DESC(mode, "0 = 320x240, 1 = 160x120, 2 = 640x480");
/* Devices supported by this driver
* .driver_info contains the init method used by the camera */
static struct usb_device_id device_table[] = {
{USB_DEVICE(0x08ca, 0x0109), .driver_info = METHOD0 },
{USB_DEVICE(0x041e, 0x4024), .driver_info = METHOD0 },
{USB_DEVICE(0x0d64, 0x0108), .driver_info = METHOD0 },
{USB_DEVICE(0x0546, 0x3187), .driver_info = METHOD0 },
{USB_DEVICE(0x0d64, 0x3108), .driver_info = METHOD0 },
{USB_DEVICE(0x0595, 0x4343), .driver_info = METHOD0 },
{USB_DEVICE(0x0bb0, 0x500d), .driver_info = METHOD0 },
{USB_DEVICE(0x0feb, 0x2004), .driver_info = METHOD0 },
{USB_DEVICE(0x055f, 0xb500), .driver_info = METHOD0 },
{USB_DEVICE(0x08ca, 0x2062), .driver_info = METHOD2 },
{USB_DEVICE(0x052b, 0x1a18), .driver_info = METHOD1 },
{USB_DEVICE(0x04c8, 0x0729), .driver_info = METHOD0 },
{USB_DEVICE(0x04f2, 0xa208), .driver_info = METHOD0 },
{USB_DEVICE(0x0784, 0x0040), .driver_info = METHOD1 },
{USB_DEVICE(0x06d6, 0x0034), .driver_info = METHOD0 },
{USB_DEVICE(0x0a17, 0x0062), .driver_info = METHOD2 },
{} /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, device_table);
/* Camera stuff */
struct zr364xx_camera {
struct usb_device *udev; /* save off the usb device pointer */
struct usb_interface *interface;/* the interface for this device */
struct video_device *vdev; /* v4l video device */
u8 *framebuf;
int nb;
unsigned char *buffer;
int skip;
int brightness;
int width;
int height;
int method;
struct mutex lock;
};
/* function used to send initialisation commands to the camera */
static int send_control_msg(struct usb_device *udev, u8 request, u16 value,
u16 index, unsigned char *cp, u16 size)
{
int status;
unsigned char *transfer_buffer = kmalloc(size, GFP_KERNEL);
if (!transfer_buffer) {
info("kmalloc(%d) failed", size);
return -ENOMEM;
}
memcpy(transfer_buffer, cp, size);
status = usb_control_msg(udev,
usb_sndctrlpipe(udev, 0),
request,
USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, value, index,
transfer_buffer, size, CTRL_TIMEOUT);
kfree(transfer_buffer);
if (status < 0)
info("Failed sending control message, error %d.", status);
return status;
}
/* Control messages sent to the camera to initialize it
* and launch the capture */
typedef struct {
unsigned int value;
unsigned int size;
unsigned char *bytes;
} message;
/* method 0 */
static unsigned char m0d1[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
static unsigned char m0d2[] = { 0, 0, 0, 0, 0, 0 };
static unsigned char m0d3[] = { 0, 0 };
static message m0[] = {
{0x1f30, 0, NULL},
{0xd000, 0, NULL},
{0x3370, sizeof(m0d1), m0d1},
{0x2000, 0, NULL},
{0x2f0f, 0, NULL},
{0x2610, sizeof(m0d2), m0d2},
{0xe107, 0, NULL},
{0x2502, 0, NULL},
{0x1f70, 0, NULL},
{0xd000, 0, NULL},
{0x9a01, sizeof(m0d3), m0d3},
{-1, -1, NULL}
};
/* method 1 */
static unsigned char m1d1[] = { 0xff, 0xff };
static unsigned char m1d2[] = { 0x00, 0x00 };
static message m1[] = {
{0x1f30, 0, NULL},
{0xd000, 0, NULL},
{0xf000, 0, NULL},
{0x2000, 0, NULL},
{0x2f0f, 0, NULL},
{0x2650, 0, NULL},
{0xe107, 0, NULL},
{0x2502, sizeof(m1d1), m1d1},
{0x1f70, 0, NULL},
{0xd000, 0, NULL},
{0xd000, 0, NULL},
{0xd000, 0, NULL},
{0x9a01, sizeof(m1d2), m1d2},
{-1, -1, NULL}
};
/* method 2 */
static unsigned char m2d1[] = { 0xff, 0xff };
static message m2[] = {
{0x1f30, 0, NULL},
{0xf000, 0, NULL},
{0x2000, 0, NULL},
{0x2f0f, 0, NULL},
{0x2650, 0, NULL},
{0xe107, 0, NULL},
{0x2502, sizeof(m2d1), m2d1},
{0x1f70, 0, NULL},
{-1, -1, NULL}
};
/* init table */
static message *init[3] = { m0, m1, m2 };
/* JPEG static data in header (Huffman table, etc) */
static unsigned char header1[] = {
0xFF, 0xD8,
/*
0xFF, 0xE0, 0x00, 0x10, 'J', 'F', 'I', 'F',
0x00, 0x01, 0x01, 0x00, 0x33, 0x8A, 0x00, 0x00, 0x33, 0x88,
*/
0xFF, 0xDB, 0x00, 0x84
};
static unsigned char header2[] = {
0xFF, 0xC4, 0x00, 0x1F, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
0xFF, 0xC4, 0x00, 0xB5, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02,
0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01,
0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06,
0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1,
0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33,
0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25,
0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54,
0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A,
0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94,
0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6,
0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8,
0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA,
0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2,
0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3,
0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xC4, 0x00, 0x1F,
0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04,
0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5,
0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05,
0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11,
0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1,
0x09, 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16,
0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27,
0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44,
0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57,
0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84,
0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96,
0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA,
0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3,
0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5,
0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
0xF8, 0xF9, 0xFA, 0xFF, 0xC0, 0x00, 0x11, 0x08, 0x00, 0xF0, 0x01,
0x40, 0x03, 0x01, 0x21, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11, 0x01,
0xFF, 0xDA, 0x00, 0x0C, 0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11,
0x00, 0x3F, 0x00
};
static unsigned char header3;
/********************/
/* V4L2 integration */
/********************/
/* this function reads a full JPEG picture synchronously
* TODO: do it asynchronously... */
static int read_frame(struct zr364xx_camera *cam, int framenum)
{
int i, n, temp, head, size, actual_length;
unsigned char *ptr = NULL, *jpeg;
redo:
/* hardware brightness */
n = send_control_msg(cam->udev, 1, 0x2001, 0, NULL, 0);
temp = (0x60 << 8) + 127 - cam->brightness;
n = send_control_msg(cam->udev, 1, temp, 0, NULL, 0);
/* during the first loop we are going to insert JPEG header */
head = 0;
/* this is the place in memory where we are going to build
* the JPEG image */
jpeg = cam->framebuf + framenum * MAX_FRAME_SIZE;
/* read data... */
do {
n = usb_bulk_msg(cam->udev,
usb_rcvbulkpipe(cam->udev, 0x81),
cam->buffer, BUFFER_SIZE, &actual_length,
CTRL_TIMEOUT);
DBG("buffer : %d %d", cam->buffer[0], cam->buffer[1]);
DBG("bulk : n=%d size=%d", n, actual_length);
if (n < 0) {
info("error reading bulk msg");
return 0;
}
if (actual_length < 0 || actual_length > BUFFER_SIZE) {
info("wrong number of bytes");
return 0;
}
/* swap bytes if camera needs it */
if (cam->method == METHOD0) {
u16 *buf = (u16*)cam->buffer;
for (i = 0; i < BUFFER_SIZE/2; i++)
swab16s(buf + i);
}
/* write the JPEG header */
if (!head) {
DBG("jpeg header");
ptr = jpeg;
memcpy(ptr, header1, sizeof(header1));
ptr += sizeof(header1);
header3 = 0;
memcpy(ptr, &header3, 1);
ptr++;
memcpy(ptr, cam->buffer, 64);
ptr += 64;
header3 = 1;
memcpy(ptr, &header3, 1);
ptr++;
memcpy(ptr, cam->buffer + 64, 64);
ptr += 64;
memcpy(ptr, header2, sizeof(header2));
ptr += sizeof(header2);
memcpy(ptr, cam->buffer + 128,
actual_length - 128);
ptr += actual_length - 128;
head = 1;
DBG("header : %d %d %d %d %d %d %d %d %d",
cam->buffer[0], cam->buffer[1], cam->buffer[2],
cam->buffer[3], cam->buffer[4], cam->buffer[5],
cam->buffer[6], cam->buffer[7], cam->buffer[8]);
} else {
memcpy(ptr, cam->buffer, actual_length);
ptr += actual_length;
}
}
/* ... until there is no more */
while (actual_length == BUFFER_SIZE);
/* we skip the 2 first frames which are usually buggy */
if (cam->skip) {
cam->skip--;
goto redo;
}
/* go back to find the JPEG EOI marker */
size = ptr - jpeg;
ptr -= 2;
while (ptr > jpeg) {
if (*ptr == 0xFF && *(ptr + 1) == 0xD9
&& *(ptr + 2) == 0xFF)
break;
ptr--;
}
if (ptr == jpeg)
DBG("No EOI marker");
/* Sometimes there is junk data in the middle of the picture,
* we want to skip this bogus frames */
while (ptr > jpeg) {
if (*ptr == 0xFF && *(ptr + 1) == 0xFF
&& *(ptr + 2) == 0xFF)
break;
ptr--;
}
if (ptr != jpeg) {
DBG("Bogus frame ? %d", cam->nb);
goto redo;
}
DBG("jpeg : %d %d %d %d %d %d %d %d",
jpeg[0], jpeg[1], jpeg[2], jpeg[3],
jpeg[4], jpeg[5], jpeg[6], jpeg[7]);
return size;
}
static ssize_t zr364xx_read(struct file *file, char *buf, size_t cnt,
loff_t * ppos)
{
unsigned long count = cnt;
struct video_device *vdev = video_devdata(file);
struct zr364xx_camera *cam;
DBG("zr364xx_read: read %d bytes.", (int) count);
if (vdev == NULL)
return -ENODEV;
cam = video_get_drvdata(vdev);
if (!buf)
return -EINVAL;
if (!count)
return -EINVAL;
/* NoMan Sux ! */
count = read_frame(cam, 0);
if (copy_to_user(buf, cam->framebuf, count))
return -EFAULT;
return count;
}
static int zr364xx_vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
memset(cap, 0, sizeof(*cap));
strcpy(cap->driver, DRIVER_DESC);
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
return 0;
}
static int zr364xx_vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *i)
{
if (i->index != 0)
return -EINVAL;
memset(i, 0, sizeof(*i));
i->index = 0;
strcpy(i->name, DRIVER_DESC " Camera");
i->type = V4L2_INPUT_TYPE_CAMERA;
return 0;
}
static int zr364xx_vidioc_g_input(struct file *file, void *priv,
unsigned int *i)
{
*i = 0;
return 0;
}
static int zr364xx_vidioc_s_input(struct file *file, void *priv,
unsigned int i)
{
if (i != 0)
return -EINVAL;
return 0;
}
static int zr364xx_vidioc_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *c)
{
struct video_device *vdev = video_devdata(file);
struct zr364xx_camera *cam;
if (vdev == NULL)
return -ENODEV;
cam = video_get_drvdata(vdev);
switch (c->id) {
case V4L2_CID_BRIGHTNESS:
c->type = V4L2_CTRL_TYPE_INTEGER;
strcpy(c->name, "Brightness");
c->minimum = 0;
c->maximum = 127;
c->step = 1;
c->default_value = cam->brightness;
c->flags = 0;
break;
default:
return -EINVAL;
}
return 0;
}
static int zr364xx_vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *c)
{
struct video_device *vdev = video_devdata(file);
struct zr364xx_camera *cam;
if (vdev == NULL)
return -ENODEV;
cam = video_get_drvdata(vdev);
switch (c->id) {
case V4L2_CID_BRIGHTNESS:
cam->brightness = c->value;
break;
default:
return -EINVAL;
}
return 0;
}
static int zr364xx_vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *c)
{
struct video_device *vdev = video_devdata(file);
struct zr364xx_camera *cam;
if (vdev == NULL)
return -ENODEV;
cam = video_get_drvdata(vdev);
switch (c->id) {
case V4L2_CID_BRIGHTNESS:
c->value = cam->brightness;
break;
default:
return -EINVAL;
}
return 0;
}
static int zr364xx_vidioc_enum_fmt_cap(struct file *file,
void *priv, struct v4l2_fmtdesc *f)
{
if (f->index > 0)
return -EINVAL;
if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
memset(f, 0, sizeof(*f));
f->index = 0;
f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
f->flags = V4L2_FMT_FLAG_COMPRESSED;
strcpy(f->description, "JPEG");
f->pixelformat = V4L2_PIX_FMT_JPEG;
return 0;
}
static int zr364xx_vidioc_try_fmt_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct video_device *vdev = video_devdata(file);
struct zr364xx_camera *cam;
if (vdev == NULL)
return -ENODEV;
cam = video_get_drvdata(vdev);
if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
return -EINVAL;
if (f->fmt.pix.field != V4L2_FIELD_ANY &&
f->fmt.pix.field != V4L2_FIELD_NONE)
return -EINVAL;
f->fmt.pix.field = V4L2_FIELD_NONE;
f->fmt.pix.width = cam->width;
f->fmt.pix.height = cam->height;
f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
f->fmt.pix.colorspace = 0;
f->fmt.pix.priv = 0;
return 0;
}
static int zr364xx_vidioc_g_fmt_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct video_device *vdev = video_devdata(file);
struct zr364xx_camera *cam;
if (vdev == NULL)
return -ENODEV;
cam = video_get_drvdata(vdev);
if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
memset(&f->fmt.pix, 0, sizeof(struct v4l2_pix_format));
f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
f->fmt.pix.pixelformat = V4L2_PIX_FMT_JPEG;
f->fmt.pix.field = V4L2_FIELD_NONE;
f->fmt.pix.width = cam->width;
f->fmt.pix.height = cam->height;
f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
f->fmt.pix.colorspace = 0;
f->fmt.pix.priv = 0;
return 0;
}
static int zr364xx_vidioc_s_fmt_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct video_device *vdev = video_devdata(file);
struct zr364xx_camera *cam;
if (vdev == NULL)
return -ENODEV;
cam = video_get_drvdata(vdev);
if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
return -EINVAL;
if (f->fmt.pix.field != V4L2_FIELD_ANY &&
f->fmt.pix.field != V4L2_FIELD_NONE)
return -EINVAL;
f->fmt.pix.field = V4L2_FIELD_NONE;
f->fmt.pix.width = cam->width;
f->fmt.pix.height = cam->height;
f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
f->fmt.pix.colorspace = 0;
f->fmt.pix.priv = 0;
DBG("ok!");
return 0;
}
static int zr364xx_vidioc_streamon(struct file *file, void *priv,
enum v4l2_buf_type type)
{
return 0;
}
static int zr364xx_vidioc_streamoff(struct file *file, void *priv,
enum v4l2_buf_type type)
{
return 0;
}
/* open the camera */
static int zr364xx_open(struct inode *inode, struct file *file)
{
struct video_device *vdev = video_devdata(file);
struct zr364xx_camera *cam = video_get_drvdata(vdev);
struct usb_device *udev = cam->udev;
int i, err;
DBG("zr364xx_open");
cam->skip = 2;
err = video_exclusive_open(inode, file);
if (err < 0)
return err;
if (!cam->framebuf) {
cam->framebuf = vmalloc_32(MAX_FRAME_SIZE * FRAMES);
if (!cam->framebuf) {
info("vmalloc_32 failed!");
return -ENOMEM;
}
}
mutex_lock(&cam->lock);
for (i = 0; init[cam->method][i].size != -1; i++) {
err =
send_control_msg(udev, 1, init[cam->method][i].value,
0, init[cam->method][i].bytes,
init[cam->method][i].size);
if (err < 0) {
info("error during open sequence: %d", i);
mutex_unlock(&cam->lock);
return err;
}
}
file->private_data = vdev;
/* Added some delay here, since opening/closing the camera quickly,
* like Ekiga does during its startup, can crash the webcam
*/
mdelay(100);
mutex_unlock(&cam->lock);
return 0;
}
/* release the camera */
static int zr364xx_release(struct inode *inode, struct file *file)
{
struct video_device *vdev = video_devdata(file);
struct zr364xx_camera *cam;
struct usb_device *udev;
int i, err;
DBG("zr364xx_release");
if (vdev == NULL)
return -ENODEV;
cam = video_get_drvdata(vdev);
udev = cam->udev;
mutex_lock(&cam->lock);
for (i = 0; i < 2; i++) {
err =
send_control_msg(udev, 1, init[cam->method][i].value,
0, init[i][cam->method].bytes,
init[cam->method][i].size);
if (err < 0) {
info("error during release sequence");
mutex_unlock(&cam->lock);
return err;
}
}
file->private_data = NULL;
video_exclusive_release(inode, file);
/* Added some delay here, since opening/closing the camera quickly,
* like Ekiga does during its startup, can crash the webcam
*/
mdelay(100);
mutex_unlock(&cam->lock);
return 0;
}
static int zr364xx_mmap(struct file *file, struct vm_area_struct *vma)
{
void *pos;
unsigned long start = vma->vm_start;
unsigned long size = vma->vm_end - vma->vm_start;
struct video_device *vdev = video_devdata(file);
struct zr364xx_camera *cam;
DBG("zr364xx_mmap: %ld\n", size);
if (vdev == NULL)
return -ENODEV;
cam = video_get_drvdata(vdev);
pos = cam->framebuf;
while (size > 0) {
if (vm_insert_page(vma, start, vmalloc_to_page(pos)))
return -EAGAIN;
start += PAGE_SIZE;
pos += PAGE_SIZE;
if (size > PAGE_SIZE)
size -= PAGE_SIZE;
else
size = 0;
}
return 0;
}
static struct file_operations zr364xx_fops = {
.owner = THIS_MODULE,
.open = zr364xx_open,
.release = zr364xx_release,
.read = zr364xx_read,
.mmap = zr364xx_mmap,
.ioctl = video_ioctl2,
.llseek = no_llseek,
};
static struct video_device zr364xx_template = {
.owner = THIS_MODULE,
.name = DRIVER_DESC,
.type = VID_TYPE_CAPTURE,
.fops = &zr364xx_fops,
.release = video_device_release,
.minor = -1,
.vidioc_querycap = zr364xx_vidioc_querycap,
.vidioc_enum_fmt_cap = zr364xx_vidioc_enum_fmt_cap,
.vidioc_try_fmt_cap = zr364xx_vidioc_try_fmt_cap,
.vidioc_s_fmt_cap = zr364xx_vidioc_s_fmt_cap,
.vidioc_g_fmt_cap = zr364xx_vidioc_g_fmt_cap,
.vidioc_enum_input = zr364xx_vidioc_enum_input,
.vidioc_g_input = zr364xx_vidioc_g_input,
.vidioc_s_input = zr364xx_vidioc_s_input,
.vidioc_streamon = zr364xx_vidioc_streamon,
.vidioc_streamoff = zr364xx_vidioc_streamoff,
.vidioc_queryctrl = zr364xx_vidioc_queryctrl,
.vidioc_g_ctrl = zr364xx_vidioc_g_ctrl,
.vidioc_s_ctrl = zr364xx_vidioc_s_ctrl,
};
/*******************/
/* USB integration */
/*******************/
static int zr364xx_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct zr364xx_camera *cam = NULL;
DBG("probing...");
info(DRIVER_DESC " compatible webcam plugged");
info("model %04x:%04x detected", udev->descriptor.idVendor,
udev->descriptor.idProduct);
if ((cam =
kmalloc(sizeof(struct zr364xx_camera), GFP_KERNEL)) == NULL) {
info("cam: out of memory !");
return -ENODEV;
}
memset(cam, 0x00, sizeof(struct zr364xx_camera));
/* save the init method used by this camera */
cam->method = id->driver_info;
cam->vdev = video_device_alloc();
if (cam->vdev == NULL) {
info("cam->vdev: out of memory !");
kfree(cam);
return -ENODEV;
}
memcpy(cam->vdev, &zr364xx_template, sizeof(zr364xx_template));
video_set_drvdata(cam->vdev, cam);
if (debug)
cam->vdev->debug = V4L2_DEBUG_IOCTL | V4L2_DEBUG_IOCTL_ARG;
cam->udev = udev;
if ((cam->buffer = kmalloc(BUFFER_SIZE, GFP_KERNEL)) == NULL) {
info("cam->buffer: out of memory !");
video_device_release(cam->vdev);
kfree(cam);
return -ENODEV;
}
switch (mode) {
case 1:
info("160x120 mode selected");
cam->width = 160;
cam->height = 120;
break;
case 2:
info("640x480 mode selected");
cam->width = 640;
cam->height = 480;
break;
default:
info("320x240 mode selected");
cam->width = 320;
cam->height = 240;
break;
}
m0d1[0] = mode;
m1[2].value = 0xf000 + mode;
m2[1].value = 0xf000 + mode;
header2[437] = cam->height / 256;
header2[438] = cam->height % 256;
header2[439] = cam->width / 256;
header2[440] = cam->width % 256;
cam->nb = 0;
cam->brightness = 64;
mutex_init(&cam->lock);
if (video_register_device(cam->vdev, VFL_TYPE_GRABBER, -1) == -1) {
info("video_register_device failed");
video_device_release(cam->vdev);
kfree(cam->buffer);
kfree(cam);
return -ENODEV;
}
usb_set_intfdata(intf, cam);
info(DRIVER_DESC " controlling video device %d", cam->vdev->minor);
return 0;
}
static void zr364xx_disconnect(struct usb_interface *intf)
{
struct zr364xx_camera *cam = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
dev_set_drvdata(&intf->dev, NULL);
info(DRIVER_DESC " webcam unplugged");
if (cam->vdev)
video_unregister_device(cam->vdev);
cam->vdev = NULL;
kfree(cam->buffer);
if (cam->framebuf)
vfree(cam->framebuf);
kfree(cam);
}
/**********************/
/* Module integration */
/**********************/
static struct usb_driver zr364xx_driver = {
.name = "zr364xx",
.probe = zr364xx_probe,
.disconnect = zr364xx_disconnect,
.id_table = device_table
};
static int __init zr364xx_init(void)
{
int retval;
retval = usb_register(&zr364xx_driver) < 0;
if (retval)
info("usb_register failed!");
else
info(DRIVER_DESC " module loaded");
return retval;
}
static void __exit zr364xx_exit(void)
{
info(DRIVER_DESC " module unloaded");
usb_deregister(&zr364xx_driver);
}
module_init(zr364xx_init);
module_exit(zr364xx_exit);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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