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linux/drivers/media/video/zr364xx.c
Lamarque Vieira Souza 76594c5315 V4L/DVB (12326): zr364xx: error message when buffer is too small and code cleanup 
. added code to print an error message when buffer is too small to hold frame
data, that is better than just a hard crash. Tested using MAX_FRAME_SIZE =
50000, lots of error messages appeared in /var/log/messages but no crash.

. removed line "f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;" in
zr364xx_vidioc_try_fmt_vid_cap, it should not be there.

. changes to improve performance (or at least not hurt it): removed some
unneeded debug messages; added macro FULL_DEBUG to enable debug messages in
performance critical places, this macro is disabled by default; removed "if
(frm->lpvbits == NULL)..." in zr364xx_read_video_callback because after
analisying the source code I concluded it will always results to false, so it
is not needed.

. some small code reorganization.

Signed-off-by: Lamarque V. Souza <lamarque@gmail.com>
Signed-off-by: Antoine Jacquet <royale@zerezo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-09-12 12:18:07 -03:00

1691 lines
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C
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/*
* Zoran 364xx based USB webcam module version 0.73
*
* 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
*
* Some video buffer code by Lamarque based on s2255drv.c and vivi.c drivers.
*
* 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/module.h>
#include <linux/version.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>
#include <media/v4l2-ioctl.h>
#include <media/videobuf-vmalloc.h>
/* Version Information */
#define DRIVER_VERSION "v0.73"
#define ZR364XX_VERSION_CODE KERNEL_VERSION(0, 7, 3)
#define DRIVER_AUTHOR "Antoine Jacquet, http://royale.zerezo.com/"
#define DRIVER_DESC "Zoran 364xx"
/* Camera */
#define FRAMES 1
#define MAX_FRAME_SIZE 200000
#define BUFFER_SIZE 0x1000
#define CTRL_TIMEOUT 500
#define ZR364XX_DEF_BUFS 4
#define ZR364XX_READ_IDLE 0
#define ZR364XX_READ_FRAME 1
/* Debug macro */
#define DBG(fmt, args...) \
do { \
if (debug) { \
printk(KERN_INFO KBUILD_MODNAME " " fmt, ##args); \
} \
} while (0)
/*#define FULL_DEBUG 1*/
#ifdef FULL_DEBUG
#define _DBG DBG
#else
#define _DBG(fmt, args...)
#endif
/* 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;
static int mode;
/* 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 },
{USB_DEVICE(0x06d6, 0x003b), .driver_info = METHOD0 },
{USB_DEVICE(0x0a17, 0x004e), .driver_info = METHOD2 },
{USB_DEVICE(0x041e, 0x405d), .driver_info = METHOD2 },
{USB_DEVICE(0x08ca, 0x2102), .driver_info = METHOD2 },
{} /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, device_table);
struct zr364xx_mode {
u32 color; /* output video color format */
u32 brightness; /* brightness */
};
/* frame structure */
struct zr364xx_framei {
unsigned long ulState; /* ulState:ZR364XX_READ_IDLE,
ZR364XX_READ_FRAME */
void *lpvbits; /* image data */
unsigned long cur_size; /* current data copied to it */
};
/* image buffer structure */
struct zr364xx_bufferi {
unsigned long dwFrames; /* number of frames in buffer */
struct zr364xx_framei frame[FRAMES]; /* array of FRAME structures */
};
struct zr364xx_dmaqueue {
struct list_head active;
struct zr364xx_camera *cam;
};
struct zr364xx_pipeinfo {
u32 transfer_size;
u8 *transfer_buffer;
u32 state;
void *stream_urb;
void *cam; /* back pointer to zr364xx_camera struct */
u32 err_count;
u32 idx;
};
struct zr364xx_fmt {
char *name;
u32 fourcc;
int depth;
};
/* image formats. */
static const struct zr364xx_fmt formats[] = {
{
.name = "JPG",
.fourcc = V4L2_PIX_FMT_JPEG,
.depth = 24
}
};
/* 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 */
int nb;
struct zr364xx_bufferi buffer;
int skip;
int width;
int height;
int method;
struct mutex lock;
struct mutex open_lock;
int users;
spinlock_t slock;
struct zr364xx_dmaqueue vidq;
int resources;
int last_frame;
int cur_frame;
unsigned long frame_count;
int b_acquire;
struct zr364xx_pipeinfo pipe[1];
u8 read_endpoint;
const struct zr364xx_fmt *fmt;
struct videobuf_queue vb_vidq;
enum v4l2_buf_type type;
struct zr364xx_mode mode;
};
/* buffer for one video frame */
struct zr364xx_buffer {
/* common v4l buffer stuff -- must be first */
struct videobuf_buffer vb;
const struct zr364xx_fmt *fmt;
};
/* 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) {
dev_err(&udev->dev, "kmalloc(%d) failed\n", 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)
dev_err(&udev->dev,
"Failed sending control message, error %d.\n", 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;
/* ------------------------------------------------------------------
Videobuf operations
------------------------------------------------------------------*/
static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
unsigned int *size)
{
struct zr364xx_camera *cam = vq->priv_data;
*size = cam->width * cam->height * (cam->fmt->depth >> 3);
if (*count == 0)
*count = ZR364XX_DEF_BUFS;
while (*size * (*count) > ZR364XX_DEF_BUFS * 1024 * 1024)
(*count)--;
return 0;
}
static void free_buffer(struct videobuf_queue *vq, struct zr364xx_buffer *buf)
{
_DBG("%s\n", __func__);
if (in_interrupt())
BUG();
videobuf_vmalloc_free(&buf->vb);
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
enum v4l2_field field)
{
struct zr364xx_camera *cam = vq->priv_data;
struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
vb);
int rc;
DBG("%s, field=%d, fmt name = %s\n", __func__, field, cam->fmt != NULL ?
cam->fmt->name : "");
if (cam->fmt == NULL)
return -EINVAL;
buf->vb.size = cam->width * cam->height * (cam->fmt->depth >> 3);
if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size) {
DBG("invalid buffer prepare\n");
return -EINVAL;
}
buf->fmt = cam->fmt;
buf->vb.width = cam->width;
buf->vb.height = cam->height;
buf->vb.field = field;
if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
rc = videobuf_iolock(vq, &buf->vb, NULL);
if (rc < 0)
goto fail;
}
buf->vb.state = VIDEOBUF_PREPARED;
return 0;
fail:
free_buffer(vq, buf);
return rc;
}
static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
{
struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
vb);
struct zr364xx_camera *cam = vq->priv_data;
_DBG("%s\n", __func__);
buf->vb.state = VIDEOBUF_QUEUED;
list_add_tail(&buf->vb.queue, &cam->vidq.active);
}
static void buffer_release(struct videobuf_queue *vq,
struct videobuf_buffer *vb)
{
struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
vb);
_DBG("%s\n", __func__);
free_buffer(vq, buf);
}
static struct videobuf_queue_ops zr364xx_video_qops = {
.buf_setup = buffer_setup,
.buf_prepare = buffer_prepare,
.buf_queue = buffer_queue,
.buf_release = buffer_release,
};
/********************/
/* V4L2 integration */
/********************/
static int zr364xx_vidioc_streamon(struct file *file, void *priv,
enum v4l2_buf_type type);
static ssize_t zr364xx_read(struct file *file, char __user *buf, size_t count,
loff_t * ppos)
{
struct zr364xx_camera *cam = video_drvdata(file);
_DBG("%s\n", __func__);
if (!buf)
return -EINVAL;
if (!count)
return -EINVAL;
if (cam->type == V4L2_BUF_TYPE_VIDEO_CAPTURE &&
zr364xx_vidioc_streamon(file, cam, cam->type) == 0) {
DBG("%s: reading %d bytes at pos %d.\n", __func__, (int) count,
(int) *ppos);
/* NoMan Sux ! */
return videobuf_read_one(&cam->vb_vidq, buf, count, ppos,
file->f_flags & O_NONBLOCK);
}
return 0;
}
/* video buffer vmalloc implementation based partly on VIVI driver which is
* Copyright (c) 2006 by
* Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
* Ted Walther <ted--a.t--enumera.com>
* John Sokol <sokol--a.t--videotechnology.com>
* http://v4l.videotechnology.com/
*
*/
static void zr364xx_fillbuff(struct zr364xx_camera *cam,
struct zr364xx_buffer *buf,
int jpgsize)
{
int pos = 0;
struct timeval ts;
const char *tmpbuf;
char *vbuf = videobuf_to_vmalloc(&buf->vb);
unsigned long last_frame;
struct zr364xx_framei *frm;
if (!vbuf)
return;
last_frame = cam->last_frame;
if (last_frame != -1) {
frm = &cam->buffer.frame[last_frame];
tmpbuf = (const char *)cam->buffer.frame[last_frame].lpvbits;
switch (buf->fmt->fourcc) {
case V4L2_PIX_FMT_JPEG:
buf->vb.size = jpgsize;
memcpy(vbuf, tmpbuf, buf->vb.size);
break;
default:
printk(KERN_DEBUG KBUILD_MODNAME ": unknown format?\n");
}
cam->last_frame = -1;
} else {
printk(KERN_ERR KBUILD_MODNAME ": =======no frame\n");
return;
}
DBG("%s: Buffer 0x%08lx size= %d\n", __func__,
(unsigned long)vbuf, pos);
/* tell v4l buffer was filled */
buf->vb.field_count = cam->frame_count * 2;
do_gettimeofday(&ts);
buf->vb.ts = ts;
buf->vb.state = VIDEOBUF_DONE;
}
static int zr364xx_got_frame(struct zr364xx_camera *cam, int jpgsize)
{
struct zr364xx_dmaqueue *dma_q = &cam->vidq;
struct zr364xx_buffer *buf;
unsigned long flags = 0;
int rc = 0;
DBG("wakeup: %p\n", &dma_q);
spin_lock_irqsave(&cam->slock, flags);
if (list_empty(&dma_q->active)) {
DBG("No active queue to serve\n");
rc = -1;
goto unlock;
}
buf = list_entry(dma_q->active.next,
struct zr364xx_buffer, vb.queue);
if (!waitqueue_active(&buf->vb.done)) {
/* no one active */
rc = -1;
goto unlock;
}
list_del(&buf->vb.queue);
do_gettimeofday(&buf->vb.ts);
DBG("[%p/%d] wakeup\n", buf, buf->vb.i);
zr364xx_fillbuff(cam, buf, jpgsize);
wake_up(&buf->vb.done);
DBG("wakeup [buf/i] [%p/%d]\n", buf, buf->vb.i);
unlock:
spin_unlock_irqrestore(&cam->slock, flags);
return 0;
}
/* this function moves the usb stream read pipe data
* into the system buffers.
* returns 0 on success, EAGAIN if more data to process (call this
* function again).
*/
static int zr364xx_read_video_callback(struct zr364xx_camera *cam,
struct zr364xx_pipeinfo *pipe_info,
struct urb *purb)
{
unsigned char *pdest;
unsigned char *psrc;
s32 idx = -1;
struct zr364xx_framei *frm;
int i = 0;
unsigned char *ptr = NULL;
_DBG("buffer to user\n");
idx = cam->cur_frame;
frm = &cam->buffer.frame[idx];
/* swap bytes if camera needs it */
if (cam->method == METHOD0) {
u16 *buf = (u16 *)pipe_info->transfer_buffer;
for (i = 0; i < purb->actual_length/2; i++)
swab16s(buf + i);
}
/* search done. now find out if should be acquiring */
if (!cam->b_acquire) {
/* we found a frame, but this channel is turned off */
frm->ulState = ZR364XX_READ_IDLE;
return -EINVAL;
}
psrc = (u8 *)pipe_info->transfer_buffer;
ptr = pdest = frm->lpvbits;
if (frm->ulState == ZR364XX_READ_IDLE) {
frm->ulState = ZR364XX_READ_FRAME;
frm->cur_size = 0;
_DBG("jpeg header, ");
memcpy(ptr, header1, sizeof(header1));
ptr += sizeof(header1);
header3 = 0;
memcpy(ptr, &header3, 1);
ptr++;
memcpy(ptr, psrc, 64);
ptr += 64;
header3 = 1;
memcpy(ptr, &header3, 1);
ptr++;
memcpy(ptr, psrc + 64, 64);
ptr += 64;
memcpy(ptr, header2, sizeof(header2));
ptr += sizeof(header2);
memcpy(ptr, psrc + 128,
purb->actual_length - 128);
ptr += purb->actual_length - 128;
_DBG("header : %d %d %d %d %d %d %d %d %d\n",
psrc[0], psrc[1], psrc[2],
psrc[3], psrc[4], psrc[5],
psrc[6], psrc[7], psrc[8]);
frm->cur_size = ptr - pdest;
} else {
if (frm->cur_size + purb->actual_length > MAX_FRAME_SIZE) {
dev_info(&cam->udev->dev,
"%s: buffer (%d bytes) too small to hold "
"frame data. Discarding frame data.\n",
__func__, MAX_FRAME_SIZE);
} else {
pdest += frm->cur_size;
memcpy(pdest, psrc, purb->actual_length);
frm->cur_size += purb->actual_length;
}
}
/*_DBG("cur_size %lu urb size %d\n", frm->cur_size,
purb->actual_length);*/
if (purb->actual_length < pipe_info->transfer_size) {
_DBG("****************Buffer[%d]full*************\n", idx);
cam->last_frame = cam->cur_frame;
cam->cur_frame++;
/* end of system frame ring buffer, start at zero */
if (cam->cur_frame == cam->buffer.dwFrames)
cam->cur_frame = 0;
/* frame ready */
/* go back to find the JPEG EOI marker */
ptr = pdest = frm->lpvbits;
ptr += frm->cur_size - 2;
while (ptr > pdest) {
if (*ptr == 0xFF && *(ptr + 1) == 0xD9
&& *(ptr + 2) == 0xFF)
break;
ptr--;
}
if (ptr == pdest)
DBG("No EOI marker\n");
/* Sometimes there is junk data in the middle of the picture,
* we want to skip this bogus frames */
while (ptr > pdest) {
if (*ptr == 0xFF && *(ptr + 1) == 0xFF
&& *(ptr + 2) == 0xFF)
break;
ptr--;
}
if (ptr != pdest) {
DBG("Bogus frame ? %d\n", ++(cam->nb));
} else if (cam->b_acquire) {
/* we skip the 2 first frames which are usually buggy */
if (cam->skip)
cam->skip--;
else {
_DBG("jpeg(%lu): %d %d %d %d %d %d %d %d\n",
frm->cur_size,
pdest[0], pdest[1], pdest[2], pdest[3],
pdest[4], pdest[5], pdest[6], pdest[7]);
zr364xx_got_frame(cam, frm->cur_size);
}
}
cam->frame_count++;
frm->ulState = ZR364XX_READ_IDLE;
frm->cur_size = 0;
}
/* done successfully */
return 0;
}
static int res_get(struct zr364xx_camera *cam)
{
/* is it free? */
mutex_lock(&cam->lock);
if (cam->resources) {
/* no, someone else uses it */
mutex_unlock(&cam->lock);
return 0;
}
/* it's free, grab it */
cam->resources = 1;
_DBG("res: get\n");
mutex_unlock(&cam->lock);
return 1;
}
static inline int res_check(struct zr364xx_camera *cam)
{
return cam->resources;
}
static void res_free(struct zr364xx_camera *cam)
{
mutex_lock(&cam->lock);
cam->resources = 0;
mutex_unlock(&cam->lock);
_DBG("res: put\n");
}
static int zr364xx_vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct zr364xx_camera *cam = video_drvdata(file);
strlcpy(cap->driver, DRIVER_DESC, sizeof(cap->driver));
strlcpy(cap->card, cam->udev->product, sizeof(cap->card));
strlcpy(cap->bus_info, dev_name(&cam->udev->dev),
sizeof(cap->bus_info));
cap->version = ZR364XX_VERSION_CODE;
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_READWRITE |
V4L2_CAP_STREAMING;
return 0;
}
static int zr364xx_vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *i)
{
if (i->index != 0)
return -EINVAL;
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 zr364xx_camera *cam;
if (file == NULL)
return -ENODEV;
cam = video_drvdata(file);
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->mode.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 zr364xx_camera *cam;
int temp;
if (file == NULL)
return -ENODEV;
cam = video_drvdata(file);
switch (c->id) {
case V4L2_CID_BRIGHTNESS:
cam->mode.brightness = c->value;
/* hardware brightness */
mutex_lock(&cam->lock);
send_control_msg(cam->udev, 1, 0x2001, 0, NULL, 0);
temp = (0x60 << 8) + 127 - cam->mode.brightness;
send_control_msg(cam->udev, 1, temp, 0, NULL, 0);
mutex_unlock(&cam->lock);
break;
default:
return -EINVAL;
}
return 0;
}
static int zr364xx_vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *c)
{
struct zr364xx_camera *cam;
if (file == NULL)
return -ENODEV;
cam = video_drvdata(file);
switch (c->id) {
case V4L2_CID_BRIGHTNESS:
c->value = cam->mode.brightness;
break;
default:
return -EINVAL;
}
return 0;
}
static int zr364xx_vidioc_enum_fmt_vid_cap(struct file *file,
void *priv, struct v4l2_fmtdesc *f)
{
if (f->index > 0)
return -EINVAL;
f->flags = V4L2_FMT_FLAG_COMPRESSED;
strcpy(f->description, formats[0].name);
f->pixelformat = formats[0].fourcc;
return 0;
}
static char *decode_fourcc(__u32 pixelformat, char *buf)
{
buf[0] = pixelformat & 0xff;
buf[1] = (pixelformat >> 8) & 0xff;
buf[2] = (pixelformat >> 16) & 0xff;
buf[3] = (pixelformat >> 24) & 0xff;
buf[4] = '\0';
return buf;
}
static int zr364xx_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct zr364xx_camera *cam = video_drvdata(file);
char pixelformat_name[5];
if (cam == NULL)
return -ENODEV;
if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG) {
DBG("%s: unsupported pixelformat V4L2_PIX_FMT_%s\n", __func__,
decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name));
return -EINVAL;
}
if (!(f->fmt.pix.width == 160 && f->fmt.pix.height == 120) &&
!(f->fmt.pix.width == 640 && f->fmt.pix.height == 480)) {
f->fmt.pix.width = 320;
f->fmt.pix.height = 240;
}
f->fmt.pix.field = V4L2_FIELD_NONE;
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("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
f->fmt.pix.field);
return 0;
}
static int zr364xx_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct zr364xx_camera *cam;
if (file == NULL)
return -ENODEV;
cam = video_drvdata(file);
f->fmt.pix.pixelformat = formats[0].fourcc;
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_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct zr364xx_camera *cam = video_drvdata(file);
struct videobuf_queue *q = &cam->vb_vidq;
char pixelformat_name[5];
int ret = zr364xx_vidioc_try_fmt_vid_cap(file, cam, f);
int i;
if (ret < 0)
return ret;
mutex_lock(&q->vb_lock);
if (videobuf_queue_is_busy(&cam->vb_vidq)) {
DBG("%s queue busy\n", __func__);
ret = -EBUSY;
goto out;
}
if (res_check(cam)) {
DBG("%s can't change format after started\n", __func__);
ret = -EBUSY;
goto out;
}
cam->width = f->fmt.pix.width;
cam->height = f->fmt.pix.height;
dev_info(&cam->udev->dev, "%s: %dx%d mode selected\n", __func__,
cam->width, 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;
cam->vb_vidq.field = f->fmt.pix.field;
cam->mode.color = V4L2_PIX_FMT_JPEG;
if (f->fmt.pix.width == 160 && f->fmt.pix.height == 120)
mode = 1;
else if (f->fmt.pix.width == 640 && f->fmt.pix.height == 480)
mode = 2;
else
mode = 0;
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;
for (i = 0; init[cam->method][i].size != -1; i++) {
ret =
send_control_msg(cam->udev, 1, init[cam->method][i].value,
0, init[cam->method][i].bytes,
init[cam->method][i].size);
if (ret < 0) {
dev_err(&cam->udev->dev,
"error during resolution change sequence: %d\n", i);
goto out;
}
}
/* Added some delay here, since opening/closing the camera quickly,
* like Ekiga does during its startup, can crash the webcam
*/
mdelay(100);
cam->skip = 2;
ret = 0;
out:
mutex_unlock(&q->vb_lock);
DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
f->fmt.pix.field);
return ret;
}
static int zr364xx_vidioc_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *p)
{
int rc;
struct zr364xx_camera *cam = video_drvdata(file);
rc = videobuf_reqbufs(&cam->vb_vidq, p);
return rc;
}
static int zr364xx_vidioc_querybuf(struct file *file,
void *priv,
struct v4l2_buffer *p)
{
int rc;
struct zr364xx_camera *cam = video_drvdata(file);
rc = videobuf_querybuf(&cam->vb_vidq, p);
return rc;
}
static int zr364xx_vidioc_qbuf(struct file *file,
void *priv,
struct v4l2_buffer *p)
{
int rc;
struct zr364xx_camera *cam = video_drvdata(file);
_DBG("%s\n", __func__);
rc = videobuf_qbuf(&cam->vb_vidq, p);
return rc;
}
static int zr364xx_vidioc_dqbuf(struct file *file,
void *priv,
struct v4l2_buffer *p)
{
int rc;
struct zr364xx_camera *cam = video_drvdata(file);
_DBG("%s\n", __func__);
rc = videobuf_dqbuf(&cam->vb_vidq, p, file->f_flags & O_NONBLOCK);
return rc;
}
static void read_pipe_completion(struct urb *purb)
{
struct zr364xx_pipeinfo *pipe_info;
struct zr364xx_camera *cam;
int pipe;
pipe_info = purb->context;
_DBG("%s %p, status %d\n", __func__, purb, purb->status);
if (pipe_info == NULL) {
printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
return;
}
cam = pipe_info->cam;
if (cam == NULL) {
printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
return;
}
/* if shutting down, do not resubmit, exit immediately */
if (purb->status == -ESHUTDOWN) {
DBG("%s, err shutdown\n", __func__);
pipe_info->err_count++;
return;
}
if (pipe_info->state == 0) {
DBG("exiting USB pipe\n");
return;
}
if (purb->actual_length < 0 ||
purb->actual_length > pipe_info->transfer_size) {
dev_err(&cam->udev->dev, "wrong number of bytes\n");
return;
}
if (purb->status == 0)
zr364xx_read_video_callback(cam, pipe_info, purb);
else {
pipe_info->err_count++;
DBG("%s: failed URB %d\n", __func__, purb->status);
}
pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
/* reuse urb */
usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
pipe,
pipe_info->transfer_buffer,
pipe_info->transfer_size,
read_pipe_completion, pipe_info);
if (pipe_info->state != 0) {
purb->status = usb_submit_urb(pipe_info->stream_urb,
GFP_ATOMIC);
if (purb->status)
dev_err(&cam->udev->dev,
"error submitting urb (error=%i)\n",
purb->status);
} else
DBG("read pipe complete state 0\n");
}
static int zr364xx_start_readpipe(struct zr364xx_camera *cam)
{
int pipe;
int retval;
struct zr364xx_pipeinfo *pipe_info = cam->pipe;
pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
DBG("%s: start pipe IN x%x\n", __func__, cam->read_endpoint);
pipe_info->state = 1;
pipe_info->err_count = 0;
pipe_info->stream_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!pipe_info->stream_urb) {
dev_err(&cam->udev->dev, "ReadStream: Unable to alloc URB\n");
return -ENOMEM;
}
/* transfer buffer allocated in board_init */
usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
pipe,
pipe_info->transfer_buffer,
pipe_info->transfer_size,
read_pipe_completion, pipe_info);
DBG("submitting URB %p\n", pipe_info->stream_urb);
retval = usb_submit_urb(pipe_info->stream_urb, GFP_KERNEL);
if (retval) {
printk(KERN_ERR KBUILD_MODNAME ": start read pipe failed\n");
return retval;
}
return 0;
}
static void zr364xx_stop_readpipe(struct zr364xx_camera *cam)
{
struct zr364xx_pipeinfo *pipe_info;
if (cam == NULL) {
printk(KERN_ERR KBUILD_MODNAME ": invalid device\n");
return;
}
DBG("stop read pipe\n");
pipe_info = cam->pipe;
if (pipe_info) {
if (pipe_info->state != 0)
pipe_info->state = 0;
if (pipe_info->stream_urb) {
/* cancel urb */
usb_kill_urb(pipe_info->stream_urb);
usb_free_urb(pipe_info->stream_urb);
pipe_info->stream_urb = NULL;
}
}
return;
}
/* starts acquisition process */
static int zr364xx_start_acquire(struct zr364xx_camera *cam)
{
int j;
DBG("start acquire\n");
cam->last_frame = -1;
cam->cur_frame = 0;
for (j = 0; j < FRAMES; j++) {
cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
cam->buffer.frame[j].cur_size = 0;
}
cam->b_acquire = 1;
return 0;
}
static inline int zr364xx_stop_acquire(struct zr364xx_camera *cam)
{
cam->b_acquire = 0;
return 0;
}
static int zr364xx_vidioc_streamon(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct zr364xx_camera *cam = video_drvdata(file);
int j;
int res;
DBG("%s\n", __func__);
if (cam->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
dev_err(&cam->udev->dev, "invalid fh type0\n");
return -EINVAL;
}
if (cam->type != type) {
dev_err(&cam->udev->dev, "invalid fh type1\n");
return -EINVAL;
}
if (!res_get(cam)) {
dev_err(&cam->udev->dev, "stream busy\n");
return -EBUSY;
}
cam->last_frame = -1;
cam->cur_frame = 0;
cam->frame_count = 0;
for (j = 0; j < FRAMES; j++) {
cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
cam->buffer.frame[j].cur_size = 0;
}
res = videobuf_streamon(&cam->vb_vidq);
if (res == 0) {
zr364xx_start_acquire(cam);
} else {
res_free(cam);
}
return res;
}
static int zr364xx_vidioc_streamoff(struct file *file, void *priv,
enum v4l2_buf_type type)
{
int res;
struct zr364xx_camera *cam = video_drvdata(file);
DBG("%s\n", __func__);
if (cam->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
dev_err(&cam->udev->dev, "invalid fh type0\n");
return -EINVAL;
}
if (cam->type != type) {
dev_err(&cam->udev->dev, "invalid fh type1\n");
return -EINVAL;
}
zr364xx_stop_acquire(cam);
res = videobuf_streamoff(&cam->vb_vidq);
if (res < 0)
return res;
res_free(cam);
return 0;
}
/* open the camera */
static int zr364xx_open(struct file *file)
{
struct video_device *vdev = video_devdata(file);
struct zr364xx_camera *cam = video_drvdata(file);
struct usb_device *udev = cam->udev;
int i, err;
DBG("%s\n", __func__);
mutex_lock(&cam->open_lock);
if (cam->users) {
err = -EBUSY;
goto out;
}
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) {
dev_err(&cam->udev->dev,
"error during open sequence: %d\n", i);
goto out;
}
}
cam->skip = 2;
cam->users++;
file->private_data = vdev;
cam->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
cam->fmt = formats;
videobuf_queue_vmalloc_init(&cam->vb_vidq, &zr364xx_video_qops,
NULL, &cam->slock,
cam->type,
V4L2_FIELD_NONE,
sizeof(struct zr364xx_buffer), cam);
/* Added some delay here, since opening/closing the camera quickly,
* like Ekiga does during its startup, can crash the webcam
*/
mdelay(100);
err = 0;
out:
mutex_unlock(&cam->open_lock);
DBG("%s: %d\n", __func__, err);
return err;
}
static void zr364xx_destroy(struct zr364xx_camera *cam)
{
unsigned long i;
if (!cam) {
printk(KERN_ERR KBUILD_MODNAME ", %s: no device\n", __func__);
return;
}
mutex_lock(&cam->open_lock);
if (cam->vdev)
video_unregister_device(cam->vdev);
cam->vdev = NULL;
/* stops the read pipe if it is running */
if (cam->b_acquire)
zr364xx_stop_acquire(cam);
zr364xx_stop_readpipe(cam);
/* release sys buffers */
for (i = 0; i < FRAMES; i++) {
if (cam->buffer.frame[i].lpvbits) {
DBG("vfree %p\n", cam->buffer.frame[i].lpvbits);
vfree(cam->buffer.frame[i].lpvbits);
}
cam->buffer.frame[i].lpvbits = NULL;
}
/* release transfer buffer */
kfree(cam->pipe->transfer_buffer);
cam->pipe->transfer_buffer = NULL;
mutex_unlock(&cam->open_lock);
kfree(cam);
cam = NULL;
}
/* release the camera */
static int zr364xx_release(struct file *file)
{
struct zr364xx_camera *cam;
struct usb_device *udev;
int i, err;
DBG("%s\n", __func__);
cam = video_drvdata(file);
if (!cam)
return -ENODEV;
mutex_lock(&cam->open_lock);
udev = cam->udev;
/* turn off stream */
if (res_check(cam)) {
if (cam->b_acquire)
zr364xx_stop_acquire(cam);
videobuf_streamoff(&cam->vb_vidq);
res_free(cam);
}
cam->users--;
file->private_data = NULL;
for (i = 0; i < 2; 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) {
dev_err(&udev->dev, "error during release sequence\n");
goto out;
}
}
/* Added some delay here, since opening/closing the camera quickly,
* like Ekiga does during its startup, can crash the webcam
*/
mdelay(100);
err = 0;
out:
mutex_unlock(&cam->open_lock);
return err;
}
static int zr364xx_mmap(struct file *file, struct vm_area_struct *vma)
{
struct zr364xx_camera *cam = video_drvdata(file);
int ret;
if (cam == NULL) {
DBG("%s: cam == NULL\n", __func__);
return -ENODEV;
}
DBG("mmap called, vma=0x%08lx\n", (unsigned long)vma);
ret = videobuf_mmap_mapper(&cam->vb_vidq, vma);
DBG("vma start=0x%08lx, size=%ld, ret=%d\n",
(unsigned long)vma->vm_start,
(unsigned long)vma->vm_end - (unsigned long)vma->vm_start, ret);
return ret;
}
static unsigned int zr364xx_poll(struct file *file,
struct poll_table_struct *wait)
{
struct zr364xx_camera *cam = video_drvdata(file);
struct videobuf_queue *q = &cam->vb_vidq;
_DBG("%s\n", __func__);
if (cam->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return POLLERR;
return videobuf_poll_stream(file, q, wait);
}
static const struct v4l2_file_operations zr364xx_fops = {
.owner = THIS_MODULE,
.open = zr364xx_open,
.release = zr364xx_release,
.read = zr364xx_read,
.mmap = zr364xx_mmap,
.ioctl = video_ioctl2,
.poll = zr364xx_poll,
};
static const struct v4l2_ioctl_ops zr364xx_ioctl_ops = {
.vidioc_querycap = zr364xx_vidioc_querycap,
.vidioc_enum_fmt_vid_cap = zr364xx_vidioc_enum_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = zr364xx_vidioc_try_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = zr364xx_vidioc_s_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = zr364xx_vidioc_g_fmt_vid_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,
.vidioc_reqbufs = zr364xx_vidioc_reqbufs,
.vidioc_querybuf = zr364xx_vidioc_querybuf,
.vidioc_qbuf = zr364xx_vidioc_qbuf,
.vidioc_dqbuf = zr364xx_vidioc_dqbuf,
};
static struct video_device zr364xx_template = {
.name = DRIVER_DESC,
.fops = &zr364xx_fops,
.ioctl_ops = &zr364xx_ioctl_ops,
.release = video_device_release,
.minor = -1,
};
/*******************/
/* USB integration */
/*******************/
static int zr364xx_board_init(struct zr364xx_camera *cam)
{
struct zr364xx_pipeinfo *pipe = cam->pipe;
unsigned long i;
DBG("board init: %p\n", cam);
memset(pipe, 0, sizeof(*pipe));
pipe->cam = cam;
pipe->transfer_size = BUFFER_SIZE;
pipe->transfer_buffer = kzalloc(pipe->transfer_size,
GFP_KERNEL);
if (pipe->transfer_buffer == NULL) {
DBG("out of memory!\n");
return -ENOMEM;
}
cam->b_acquire = 0;
cam->frame_count = 0;
/*** start create system buffers ***/
for (i = 0; i < FRAMES; i++) {
/* always allocate maximum size for system buffers */
cam->buffer.frame[i].lpvbits = vmalloc(MAX_FRAME_SIZE);
DBG("valloc %p, idx %lu, pdata %p\n",
&cam->buffer.frame[i], i,
cam->buffer.frame[i].lpvbits);
if (cam->buffer.frame[i].lpvbits == NULL) {
printk(KERN_INFO KBUILD_MODNAME ": out of memory. "
"Using less frames\n");
break;
}
}
if (i == 0) {
printk(KERN_INFO KBUILD_MODNAME ": out of memory. Aborting\n");
kfree(cam->pipe->transfer_buffer);
cam->pipe->transfer_buffer = NULL;
return -ENOMEM;
} else
cam->buffer.dwFrames = i;
/* make sure internal states are set */
for (i = 0; i < FRAMES; i++) {
cam->buffer.frame[i].ulState = ZR364XX_READ_IDLE;
cam->buffer.frame[i].cur_size = 0;
}
cam->cur_frame = 0;
cam->last_frame = -1;
/*** end create system buffers ***/
/* start read pipe */
zr364xx_start_readpipe(cam);
DBG(": board initialized\n");
return 0;
}
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;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
int err;
int i;
DBG("probing...\n");
dev_info(&intf->dev, DRIVER_DESC " compatible webcam plugged\n");
dev_info(&intf->dev, "model %04x:%04x detected\n",
le16_to_cpu(udev->descriptor.idVendor),
le16_to_cpu(udev->descriptor.idProduct));
cam = kzalloc(sizeof(struct zr364xx_camera), GFP_KERNEL);
if (cam == NULL) {
dev_err(&udev->dev, "cam: out of memory !\n");
return -ENOMEM;
}
/* save the init method used by this camera */
cam->method = id->driver_info;
cam->vdev = video_device_alloc();
if (cam->vdev == NULL) {
dev_err(&udev->dev, "cam->vdev: out of memory !\n");
kfree(cam);
cam = NULL;
return -ENOMEM;
}
memcpy(cam->vdev, &zr364xx_template, sizeof(zr364xx_template));
cam->vdev->parent = &intf->dev;
video_set_drvdata(cam->vdev, cam);
if (debug)
cam->vdev->debug = V4L2_DEBUG_IOCTL | V4L2_DEBUG_IOCTL_ARG;
cam->udev = udev;
switch (mode) {
case 1:
dev_info(&udev->dev, "160x120 mode selected\n");
cam->width = 160;
cam->height = 120;
break;
case 2:
dev_info(&udev->dev, "640x480 mode selected\n");
cam->width = 640;
cam->height = 480;
break;
default:
dev_info(&udev->dev, "320x240 mode selected\n");
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->users = 0;
cam->nb = 0;
cam->mode.brightness = 64;
mutex_init(&cam->lock);
mutex_init(&cam->open_lock);
DBG("dev: %p, udev %p interface %p\n", cam, cam->udev, intf);
/* set up the endpoint information */
iface_desc = intf->cur_altsetting;
DBG("num endpoints %d\n", iface_desc->desc.bNumEndpoints);
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
if (!cam->read_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
/* we found the bulk in endpoint */
cam->read_endpoint = endpoint->bEndpointAddress;
}
}
if (!cam->read_endpoint) {
dev_err(&intf->dev, "Could not find bulk-in endpoint\n");
return -ENOMEM;
}
/* v4l */
INIT_LIST_HEAD(&cam->vidq.active);
cam->vidq.cam = cam;
err = video_register_device(cam->vdev, VFL_TYPE_GRABBER, -1);
if (err) {
dev_err(&udev->dev, "video_register_device failed\n");
video_device_release(cam->vdev);
kfree(cam);
cam = NULL;
return err;
}
usb_set_intfdata(intf, cam);
/* load zr364xx board specific */
err = zr364xx_board_init(cam);
if (err) {
spin_lock_init(&cam->slock);
return err;
}
spin_lock_init(&cam->slock);
dev_info(&udev->dev, DRIVER_DESC " controlling video device %d\n",
cam->vdev->num);
return 0;
}
static void zr364xx_disconnect(struct usb_interface *intf)
{
struct zr364xx_camera *cam = usb_get_intfdata(intf);
videobuf_mmap_free(&cam->vb_vidq);
usb_set_intfdata(intf, NULL);
dev_info(&intf->dev, DRIVER_DESC " webcam unplugged\n");
zr364xx_destroy(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);
if (retval)
printk(KERN_ERR KBUILD_MODNAME ": usb_register failed!\n");
else
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
return retval;
}
static void __exit zr364xx_exit(void)
{
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC " module unloaded\n");
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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