391 lines
10 KiB
C
391 lines
10 KiB
C
/*
|
|
* Jeilinj subdriver
|
|
*
|
|
* Supports some Jeilin dual-mode cameras which use bulk transport and
|
|
* download raw JPEG data.
|
|
*
|
|
* Copyright (C) 2009 Theodore Kilgore
|
|
*
|
|
* 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
|
|
* 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
|
|
*/
|
|
|
|
#define MODULE_NAME "jeilinj"
|
|
|
|
#include <linux/workqueue.h>
|
|
#include "gspca.h"
|
|
#include "jpeg.h"
|
|
|
|
MODULE_AUTHOR("Theodore Kilgore <kilgota@auburn.edu>");
|
|
MODULE_DESCRIPTION("GSPCA/JEILINJ USB Camera Driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/* Default timeouts, in ms */
|
|
#define JEILINJ_CMD_TIMEOUT 500
|
|
#define JEILINJ_DATA_TIMEOUT 1000
|
|
|
|
/* Maximum transfer size to use. */
|
|
#define JEILINJ_MAX_TRANSFER 0x200
|
|
|
|
#define FRAME_HEADER_LEN 0x10
|
|
|
|
/* Structure to hold all of our device specific stuff */
|
|
struct sd {
|
|
struct gspca_dev gspca_dev; /* !! must be the first item */
|
|
const struct v4l2_pix_format *cap_mode;
|
|
/* Driver stuff */
|
|
struct work_struct work_struct;
|
|
struct workqueue_struct *work_thread;
|
|
u8 quality; /* image quality */
|
|
u8 jpegqual; /* webcam quality */
|
|
u8 *jpeg_hdr;
|
|
};
|
|
|
|
struct jlj_command {
|
|
unsigned char instruction[2];
|
|
unsigned char ack_wanted;
|
|
};
|
|
|
|
/* AFAICT these cameras will only do 320x240. */
|
|
static struct v4l2_pix_format jlj_mode[] = {
|
|
{ 320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
|
|
.bytesperline = 320,
|
|
.sizeimage = 320 * 240,
|
|
.colorspace = V4L2_COLORSPACE_JPEG,
|
|
.priv = 0}
|
|
};
|
|
|
|
/*
|
|
* cam uses endpoint 0x03 to send commands, 0x84 for read commands,
|
|
* and 0x82 for bulk transfer.
|
|
*/
|
|
|
|
/* All commands are two bytes only */
|
|
static int jlj_write2(struct gspca_dev *gspca_dev, unsigned char *command)
|
|
{
|
|
int retval;
|
|
|
|
memcpy(gspca_dev->usb_buf, command, 2);
|
|
retval = usb_bulk_msg(gspca_dev->dev,
|
|
usb_sndbulkpipe(gspca_dev->dev, 3),
|
|
gspca_dev->usb_buf, 2, NULL, 500);
|
|
if (retval < 0)
|
|
PDEBUG(D_ERR, "command write [%02x] error %d",
|
|
gspca_dev->usb_buf[0], retval);
|
|
return retval;
|
|
}
|
|
|
|
/* Responses are one byte only */
|
|
static int jlj_read1(struct gspca_dev *gspca_dev, unsigned char response)
|
|
{
|
|
int retval;
|
|
|
|
retval = usb_bulk_msg(gspca_dev->dev,
|
|
usb_rcvbulkpipe(gspca_dev->dev, 0x84),
|
|
gspca_dev->usb_buf, 1, NULL, 500);
|
|
response = gspca_dev->usb_buf[0];
|
|
if (retval < 0)
|
|
PDEBUG(D_ERR, "read command [%02x] error %d",
|
|
gspca_dev->usb_buf[0], retval);
|
|
return retval;
|
|
}
|
|
|
|
static int jlj_start(struct gspca_dev *gspca_dev)
|
|
{
|
|
int i;
|
|
int retval = -1;
|
|
u8 response = 0xff;
|
|
struct jlj_command start_commands[] = {
|
|
{{0x71, 0x81}, 0},
|
|
{{0x70, 0x05}, 0},
|
|
{{0x95, 0x70}, 1},
|
|
{{0x71, 0x81}, 0},
|
|
{{0x70, 0x04}, 0},
|
|
{{0x95, 0x70}, 1},
|
|
{{0x71, 0x00}, 0},
|
|
{{0x70, 0x08}, 0},
|
|
{{0x95, 0x70}, 1},
|
|
{{0x94, 0x02}, 0},
|
|
{{0xde, 0x24}, 0},
|
|
{{0x94, 0x02}, 0},
|
|
{{0xdd, 0xf0}, 0},
|
|
{{0x94, 0x02}, 0},
|
|
{{0xe3, 0x2c}, 0},
|
|
{{0x94, 0x02}, 0},
|
|
{{0xe4, 0x00}, 0},
|
|
{{0x94, 0x02}, 0},
|
|
{{0xe5, 0x00}, 0},
|
|
{{0x94, 0x02}, 0},
|
|
{{0xe6, 0x2c}, 0},
|
|
{{0x94, 0x03}, 0},
|
|
{{0xaa, 0x00}, 0},
|
|
{{0x71, 0x1e}, 0},
|
|
{{0x70, 0x06}, 0},
|
|
{{0x71, 0x80}, 0},
|
|
{{0x70, 0x07}, 0}
|
|
};
|
|
for (i = 0; i < ARRAY_SIZE(start_commands); i++) {
|
|
retval = jlj_write2(gspca_dev, start_commands[i].instruction);
|
|
if (retval < 0)
|
|
return retval;
|
|
if (start_commands[i].ack_wanted)
|
|
retval = jlj_read1(gspca_dev, response);
|
|
if (retval < 0)
|
|
return retval;
|
|
}
|
|
PDEBUG(D_ERR, "jlj_start retval is %d", retval);
|
|
return retval;
|
|
}
|
|
|
|
static int jlj_stop(struct gspca_dev *gspca_dev)
|
|
{
|
|
int i;
|
|
int retval;
|
|
struct jlj_command stop_commands[] = {
|
|
{{0x71, 0x00}, 0},
|
|
{{0x70, 0x09}, 0},
|
|
{{0x71, 0x80}, 0},
|
|
{{0x70, 0x05}, 0}
|
|
};
|
|
for (i = 0; i < ARRAY_SIZE(stop_commands); i++) {
|
|
retval = jlj_write2(gspca_dev, stop_commands[i].instruction);
|
|
if (retval < 0)
|
|
return retval;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
/* This function is called as a workqueue function and runs whenever the camera
|
|
* is streaming data. Because it is a workqueue function it is allowed to sleep
|
|
* so we can use synchronous USB calls. To avoid possible collisions with other
|
|
* threads attempting to use the camera's USB interface the gspca usb_lock is
|
|
* used when performing the one USB control operation inside the workqueue,
|
|
* which tells the camera to close the stream. In practice the only thing
|
|
* which needs to be protected against is the usb_set_interface call that
|
|
* gspca makes during stream_off. Otherwise the camera doesn't provide any
|
|
* controls that the user could try to change.
|
|
*/
|
|
|
|
static void jlj_dostream(struct work_struct *work)
|
|
{
|
|
struct sd *dev = container_of(work, struct sd, work_struct);
|
|
struct gspca_dev *gspca_dev = &dev->gspca_dev;
|
|
struct gspca_frame *frame;
|
|
int blocks_left; /* 0x200-sized blocks remaining in current frame. */
|
|
int size_in_blocks;
|
|
int act_len;
|
|
int discarding = 0; /* true if we failed to get space for frame. */
|
|
int packet_type;
|
|
int ret;
|
|
u8 *buffer;
|
|
|
|
buffer = kmalloc(JEILINJ_MAX_TRANSFER, GFP_KERNEL | GFP_DMA);
|
|
if (!buffer) {
|
|
PDEBUG(D_ERR, "Couldn't allocate USB buffer");
|
|
goto quit_stream;
|
|
}
|
|
while (gspca_dev->present && gspca_dev->streaming) {
|
|
if (!gspca_dev->present)
|
|
goto quit_stream;
|
|
/* Start a new frame, and add the JPEG header, first thing */
|
|
frame = gspca_get_i_frame(gspca_dev);
|
|
if (frame && !discarding)
|
|
gspca_frame_add(gspca_dev, FIRST_PACKET, frame,
|
|
dev->jpeg_hdr, JPEG_HDR_SZ);
|
|
else
|
|
discarding = 1;
|
|
/*
|
|
* Now request data block 0. Line 0 reports the size
|
|
* to download, in blocks of size 0x200, and also tells the
|
|
* "actual" data size, in bytes, which seems best to ignore.
|
|
*/
|
|
ret = usb_bulk_msg(gspca_dev->dev,
|
|
usb_rcvbulkpipe(gspca_dev->dev, 0x82),
|
|
buffer, JEILINJ_MAX_TRANSFER, &act_len,
|
|
JEILINJ_DATA_TIMEOUT);
|
|
PDEBUG(D_STREAM,
|
|
"Got %d bytes out of %d for Block 0",
|
|
act_len, JEILINJ_MAX_TRANSFER);
|
|
if (ret < 0 || act_len < FRAME_HEADER_LEN)
|
|
goto quit_stream;
|
|
size_in_blocks = buffer[0x0a];
|
|
blocks_left = buffer[0x0a] - 1;
|
|
PDEBUG(D_STREAM, "blocks_left = 0x%x", blocks_left);
|
|
packet_type = INTER_PACKET;
|
|
if (frame && !discarding)
|
|
/* Toss line 0 of data block 0, keep the rest. */
|
|
gspca_frame_add(gspca_dev, packet_type,
|
|
frame, buffer + FRAME_HEADER_LEN,
|
|
JEILINJ_MAX_TRANSFER - FRAME_HEADER_LEN);
|
|
else
|
|
discarding = 1;
|
|
while (blocks_left > 0) {
|
|
if (!gspca_dev->present)
|
|
goto quit_stream;
|
|
ret = usb_bulk_msg(gspca_dev->dev,
|
|
usb_rcvbulkpipe(gspca_dev->dev, 0x82),
|
|
buffer, JEILINJ_MAX_TRANSFER, &act_len,
|
|
JEILINJ_DATA_TIMEOUT);
|
|
if (ret < 0 || act_len < JEILINJ_MAX_TRANSFER)
|
|
goto quit_stream;
|
|
PDEBUG(D_STREAM,
|
|
"%d blocks remaining for frame", blocks_left);
|
|
blocks_left -= 1;
|
|
if (blocks_left == 0)
|
|
packet_type = LAST_PACKET;
|
|
else
|
|
packet_type = INTER_PACKET;
|
|
if (frame && !discarding)
|
|
gspca_frame_add(gspca_dev, packet_type,
|
|
frame, buffer,
|
|
JEILINJ_MAX_TRANSFER);
|
|
else
|
|
discarding = 1;
|
|
}
|
|
}
|
|
quit_stream:
|
|
mutex_lock(&gspca_dev->usb_lock);
|
|
if (gspca_dev->present)
|
|
jlj_stop(gspca_dev);
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
kfree(buffer);
|
|
}
|
|
|
|
/* This function is called at probe time just before sd_init */
|
|
static int sd_config(struct gspca_dev *gspca_dev,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct cam *cam = &gspca_dev->cam;
|
|
struct sd *dev = (struct sd *) gspca_dev;
|
|
|
|
dev->quality = 85;
|
|
dev->jpegqual = 85;
|
|
PDEBUG(D_PROBE,
|
|
"JEILINJ camera detected"
|
|
" (vid/pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
|
|
cam->cam_mode = jlj_mode;
|
|
cam->nmodes = 1;
|
|
cam->bulk = 1;
|
|
/* We don't use the buffer gspca allocates so make it small. */
|
|
cam->bulk_size = 32;
|
|
INIT_WORK(&dev->work_struct, jlj_dostream);
|
|
return 0;
|
|
}
|
|
|
|
/* called on streamoff with alt==0 and on disconnect */
|
|
/* the usb_lock is held at entry - restore on exit */
|
|
static void sd_stop0(struct gspca_dev *gspca_dev)
|
|
{
|
|
struct sd *dev = (struct sd *) gspca_dev;
|
|
|
|
/* wait for the work queue to terminate */
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
/* This waits for jlj_dostream to finish */
|
|
destroy_workqueue(dev->work_thread);
|
|
dev->work_thread = NULL;
|
|
mutex_lock(&gspca_dev->usb_lock);
|
|
kfree(dev->jpeg_hdr);
|
|
}
|
|
|
|
/* this function is called at probe and resume time */
|
|
static int sd_init(struct gspca_dev *gspca_dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* Set up for getting frames. */
|
|
static int sd_start(struct gspca_dev *gspca_dev)
|
|
{
|
|
struct sd *dev = (struct sd *) gspca_dev;
|
|
int ret;
|
|
|
|
/* create the JPEG header */
|
|
dev->jpeg_hdr = kmalloc(JPEG_HDR_SZ, GFP_KERNEL);
|
|
if (dev->jpeg_hdr == NULL)
|
|
return -ENOMEM;
|
|
jpeg_define(dev->jpeg_hdr, gspca_dev->height, gspca_dev->width,
|
|
0x21); /* JPEG 422 */
|
|
jpeg_set_qual(dev->jpeg_hdr, dev->quality);
|
|
PDEBUG(D_STREAM, "Start streaming at 320x240");
|
|
ret = jlj_start(gspca_dev);
|
|
if (ret < 0) {
|
|
PDEBUG(D_ERR, "Start streaming command failed");
|
|
return ret;
|
|
}
|
|
/* Start the workqueue function to do the streaming */
|
|
dev->work_thread = create_singlethread_workqueue(MODULE_NAME);
|
|
queue_work(dev->work_thread, &dev->work_struct);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Table of supported USB devices */
|
|
static const __devinitdata struct usb_device_id device_table[] = {
|
|
{USB_DEVICE(0x0979, 0x0280)},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(usb, device_table);
|
|
|
|
/* sub-driver description */
|
|
static const struct sd_desc sd_desc = {
|
|
.name = MODULE_NAME,
|
|
.config = sd_config,
|
|
.init = sd_init,
|
|
.start = sd_start,
|
|
.stop0 = sd_stop0,
|
|
};
|
|
|
|
/* -- device connect -- */
|
|
static int sd_probe(struct usb_interface *intf,
|
|
const struct usb_device_id *id)
|
|
{
|
|
return gspca_dev_probe(intf, id,
|
|
&sd_desc,
|
|
sizeof(struct sd),
|
|
THIS_MODULE);
|
|
}
|
|
|
|
static struct usb_driver sd_driver = {
|
|
.name = MODULE_NAME,
|
|
.id_table = device_table,
|
|
.probe = sd_probe,
|
|
.disconnect = gspca_disconnect,
|
|
#ifdef CONFIG_PM
|
|
.suspend = gspca_suspend,
|
|
.resume = gspca_resume,
|
|
#endif
|
|
};
|
|
|
|
/* -- module insert / remove -- */
|
|
static int __init sd_mod_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = usb_register(&sd_driver);
|
|
if (ret < 0)
|
|
return ret;
|
|
PDEBUG(D_PROBE, "registered");
|
|
return 0;
|
|
}
|
|
|
|
static void __exit sd_mod_exit(void)
|
|
{
|
|
usb_deregister(&sd_driver);
|
|
PDEBUG(D_PROBE, "deregistered");
|
|
}
|
|
|
|
module_init(sd_mod_init);
|
|
module_exit(sd_mod_exit);
|