435 lines
12 KiB
C
435 lines
12 KiB
C
/*
|
|
* SQ905 subdriver
|
|
*
|
|
* Copyright (C) 2008, 2009 Adam Baker and 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.
|
|
*/
|
|
|
|
/*
|
|
* History and Acknowledgments
|
|
*
|
|
* The original Linux driver for SQ905 based cameras was written by
|
|
* Marcell Lengyel and furter developed by many other contributors
|
|
* and is available from http://sourceforge.net/projects/sqcam/
|
|
*
|
|
* This driver takes advantage of the reverse engineering work done for
|
|
* that driver and for libgphoto2 but shares no code with them.
|
|
*
|
|
* This driver has used as a base the finepix driver and other gspca
|
|
* based drivers and may still contain code fragments taken from those
|
|
* drivers.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#define MODULE_NAME "sq905"
|
|
|
|
#include <linux/workqueue.h>
|
|
#include <linux/slab.h>
|
|
#include "gspca.h"
|
|
|
|
MODULE_AUTHOR("Adam Baker <linux@baker-net.org.uk>, Theodore Kilgore <kilgota@auburn.edu>");
|
|
MODULE_DESCRIPTION("GSPCA/SQ905 USB Camera Driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/* Default timeouts, in ms */
|
|
#define SQ905_CMD_TIMEOUT 500
|
|
#define SQ905_DATA_TIMEOUT 1000
|
|
|
|
/* Maximum transfer size to use. */
|
|
#define SQ905_MAX_TRANSFER 0x8000
|
|
#define FRAME_HEADER_LEN 64
|
|
|
|
/* The known modes, or registers. These go in the "value" slot. */
|
|
|
|
/* 00 is "none" obviously */
|
|
|
|
#define SQ905_BULK_READ 0x03 /* precedes any bulk read */
|
|
#define SQ905_COMMAND 0x06 /* precedes the command codes below */
|
|
#define SQ905_PING 0x07 /* when reading an "idling" command */
|
|
#define SQ905_READ_DONE 0xc0 /* ack bulk read completed */
|
|
|
|
/* Any non-zero value in the bottom 2 bits of the 2nd byte of
|
|
* the ID appears to indicate the camera can do 640*480. If the
|
|
* LSB of that byte is set the image is just upside down, otherwise
|
|
* it is rotated 180 degrees. */
|
|
#define SQ905_HIRES_MASK 0x00000300
|
|
#define SQ905_ORIENTATION_MASK 0x00000100
|
|
|
|
/* Some command codes. These go in the "index" slot. */
|
|
|
|
#define SQ905_ID 0xf0 /* asks for model string */
|
|
#define SQ905_CONFIG 0x20 /* gets photo alloc. table, not used here */
|
|
#define SQ905_DATA 0x30 /* accesses photo data, not used here */
|
|
#define SQ905_CLEAR 0xa0 /* clear everything */
|
|
#define SQ905_CAPTURE_LOW 0x60 /* Starts capture at 160x120 */
|
|
#define SQ905_CAPTURE_MED 0x61 /* Starts capture at 320x240 */
|
|
#define SQ905_CAPTURE_HIGH 0x62 /* Starts capture at 640x480 (some cams only) */
|
|
/* note that the capture command also controls the output dimensions */
|
|
|
|
/* Structure to hold all of our device specific stuff */
|
|
struct sd {
|
|
struct gspca_dev gspca_dev; /* !! must be the first item */
|
|
|
|
/*
|
|
* Driver stuff
|
|
*/
|
|
struct work_struct work_struct;
|
|
struct workqueue_struct *work_thread;
|
|
};
|
|
|
|
static struct v4l2_pix_format sq905_mode[] = {
|
|
{ 160, 120, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
|
|
.bytesperline = 160,
|
|
.sizeimage = 160 * 120,
|
|
.colorspace = V4L2_COLORSPACE_SRGB,
|
|
.priv = 0},
|
|
{ 320, 240, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
|
|
.bytesperline = 320,
|
|
.sizeimage = 320 * 240,
|
|
.colorspace = V4L2_COLORSPACE_SRGB,
|
|
.priv = 0},
|
|
{ 640, 480, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
|
|
.bytesperline = 640,
|
|
.sizeimage = 640 * 480,
|
|
.colorspace = V4L2_COLORSPACE_SRGB,
|
|
.priv = 0}
|
|
};
|
|
|
|
/*
|
|
* Send a command to the camera.
|
|
*/
|
|
static int sq905_command(struct gspca_dev *gspca_dev, u16 index)
|
|
{
|
|
int ret;
|
|
|
|
gspca_dev->usb_buf[0] = '\0';
|
|
ret = usb_control_msg(gspca_dev->dev,
|
|
usb_sndctrlpipe(gspca_dev->dev, 0),
|
|
USB_REQ_SYNCH_FRAME, /* request */
|
|
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
|
SQ905_COMMAND, index, gspca_dev->usb_buf, 1,
|
|
SQ905_CMD_TIMEOUT);
|
|
if (ret < 0) {
|
|
pr_err("%s: usb_control_msg failed (%d)\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = usb_control_msg(gspca_dev->dev,
|
|
usb_sndctrlpipe(gspca_dev->dev, 0),
|
|
USB_REQ_SYNCH_FRAME, /* request */
|
|
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
|
SQ905_PING, 0, gspca_dev->usb_buf, 1,
|
|
SQ905_CMD_TIMEOUT);
|
|
if (ret < 0) {
|
|
pr_err("%s: usb_control_msg failed 2 (%d)\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Acknowledge the end of a frame - see warning on sq905_command.
|
|
*/
|
|
static int sq905_ack_frame(struct gspca_dev *gspca_dev)
|
|
{
|
|
int ret;
|
|
|
|
gspca_dev->usb_buf[0] = '\0';
|
|
ret = usb_control_msg(gspca_dev->dev,
|
|
usb_sndctrlpipe(gspca_dev->dev, 0),
|
|
USB_REQ_SYNCH_FRAME, /* request */
|
|
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
|
SQ905_READ_DONE, 0, gspca_dev->usb_buf, 1,
|
|
SQ905_CMD_TIMEOUT);
|
|
if (ret < 0) {
|
|
pr_err("%s: usb_control_msg failed (%d)\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* request and read a block of data - see warning on sq905_command.
|
|
*/
|
|
static int
|
|
sq905_read_data(struct gspca_dev *gspca_dev, u8 *data, int size, int need_lock)
|
|
{
|
|
int ret;
|
|
int act_len;
|
|
|
|
gspca_dev->usb_buf[0] = '\0';
|
|
if (need_lock)
|
|
mutex_lock(&gspca_dev->usb_lock);
|
|
ret = usb_control_msg(gspca_dev->dev,
|
|
usb_sndctrlpipe(gspca_dev->dev, 0),
|
|
USB_REQ_SYNCH_FRAME, /* request */
|
|
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
|
SQ905_BULK_READ, size, gspca_dev->usb_buf,
|
|
1, SQ905_CMD_TIMEOUT);
|
|
if (need_lock)
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
if (ret < 0) {
|
|
pr_err("%s: usb_control_msg failed (%d)\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
ret = usb_bulk_msg(gspca_dev->dev,
|
|
usb_rcvbulkpipe(gspca_dev->dev, 0x81),
|
|
data, size, &act_len, SQ905_DATA_TIMEOUT);
|
|
|
|
/* successful, it returns 0, otherwise negative */
|
|
if (ret < 0 || act_len != size) {
|
|
pr_err("bulk read fail (%d) len %d/%d\n", ret, act_len, size);
|
|
return -EIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 gspca_dev->usb_buf we take the usb_lock when
|
|
* performing USB operations using it. In practice we don't really need this
|
|
* as the camera doesn't provide any controls.
|
|
*/
|
|
static void sq905_dostream(struct work_struct *work)
|
|
{
|
|
struct sd *dev = container_of(work, struct sd, work_struct);
|
|
struct gspca_dev *gspca_dev = &dev->gspca_dev;
|
|
int bytes_left; /* bytes remaining in current frame. */
|
|
int data_len; /* size to use for the next read. */
|
|
int header_read; /* true if we have already read the frame header. */
|
|
int packet_type;
|
|
int frame_sz;
|
|
int ret;
|
|
u8 *data;
|
|
u8 *buffer;
|
|
|
|
buffer = kmalloc(SQ905_MAX_TRANSFER, GFP_KERNEL);
|
|
if (!buffer) {
|
|
pr_err("Couldn't allocate USB buffer\n");
|
|
goto quit_stream;
|
|
}
|
|
|
|
frame_sz = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].sizeimage
|
|
+ FRAME_HEADER_LEN;
|
|
|
|
while (gspca_dev->present && gspca_dev->streaming) {
|
|
#ifdef CONFIG_PM
|
|
if (gspca_dev->frozen)
|
|
break;
|
|
#endif
|
|
/* request some data and then read it until we have
|
|
* a complete frame. */
|
|
bytes_left = frame_sz;
|
|
header_read = 0;
|
|
|
|
/* Note we do not check for gspca_dev->streaming here, as
|
|
we must finish reading an entire frame, otherwise the
|
|
next time we stream we start reading in the middle of a
|
|
frame. */
|
|
while (bytes_left > 0 && gspca_dev->present) {
|
|
data_len = bytes_left > SQ905_MAX_TRANSFER ?
|
|
SQ905_MAX_TRANSFER : bytes_left;
|
|
ret = sq905_read_data(gspca_dev, buffer, data_len, 1);
|
|
if (ret < 0)
|
|
goto quit_stream;
|
|
gspca_dbg(gspca_dev, D_PACK,
|
|
"Got %d bytes out of %d for frame\n",
|
|
data_len, bytes_left);
|
|
bytes_left -= data_len;
|
|
data = buffer;
|
|
if (!header_read) {
|
|
packet_type = FIRST_PACKET;
|
|
/* The first 64 bytes of each frame are
|
|
* a header full of FF 00 bytes */
|
|
data += FRAME_HEADER_LEN;
|
|
data_len -= FRAME_HEADER_LEN;
|
|
header_read = 1;
|
|
} else if (bytes_left == 0) {
|
|
packet_type = LAST_PACKET;
|
|
} else {
|
|
packet_type = INTER_PACKET;
|
|
}
|
|
gspca_frame_add(gspca_dev, packet_type,
|
|
data, data_len);
|
|
/* If entire frame fits in one packet we still
|
|
need to add a LAST_PACKET */
|
|
if (packet_type == FIRST_PACKET &&
|
|
bytes_left == 0)
|
|
gspca_frame_add(gspca_dev, LAST_PACKET,
|
|
NULL, 0);
|
|
}
|
|
if (gspca_dev->present) {
|
|
/* acknowledge the frame */
|
|
mutex_lock(&gspca_dev->usb_lock);
|
|
ret = sq905_ack_frame(gspca_dev);
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
if (ret < 0)
|
|
goto quit_stream;
|
|
}
|
|
}
|
|
quit_stream:
|
|
if (gspca_dev->present) {
|
|
mutex_lock(&gspca_dev->usb_lock);
|
|
sq905_command(gspca_dev, SQ905_CLEAR);
|
|
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;
|
|
|
|
/* We don't use the buffer gspca allocates so make it small. */
|
|
cam->bulk = 1;
|
|
cam->bulk_size = 64;
|
|
|
|
INIT_WORK(&dev->work_struct, sq905_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 sq905_dostream to finish */
|
|
destroy_workqueue(dev->work_thread);
|
|
dev->work_thread = NULL;
|
|
mutex_lock(&gspca_dev->usb_lock);
|
|
}
|
|
|
|
/* this function is called at probe and resume time */
|
|
static int sd_init(struct gspca_dev *gspca_dev)
|
|
{
|
|
u32 ident;
|
|
int ret;
|
|
|
|
/* connect to the camera and read
|
|
* the model ID and process that and put it away.
|
|
*/
|
|
ret = sq905_command(gspca_dev, SQ905_CLEAR);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = sq905_command(gspca_dev, SQ905_ID);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = sq905_read_data(gspca_dev, gspca_dev->usb_buf, 4, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
/* usb_buf is allocated with kmalloc so is aligned.
|
|
* Camera model number is the right way round if we assume this
|
|
* reverse engineered ID is supposed to be big endian. */
|
|
ident = be32_to_cpup((__be32 *)gspca_dev->usb_buf);
|
|
ret = sq905_command(gspca_dev, SQ905_CLEAR);
|
|
if (ret < 0)
|
|
return ret;
|
|
gspca_dbg(gspca_dev, D_CONF, "SQ905 camera ID %08x detected\n", ident);
|
|
gspca_dev->cam.cam_mode = sq905_mode;
|
|
gspca_dev->cam.nmodes = ARRAY_SIZE(sq905_mode);
|
|
if (!(ident & SQ905_HIRES_MASK))
|
|
gspca_dev->cam.nmodes--;
|
|
|
|
if (ident & SQ905_ORIENTATION_MASK)
|
|
gspca_dev->cam.input_flags = V4L2_IN_ST_VFLIP;
|
|
else
|
|
gspca_dev->cam.input_flags = V4L2_IN_ST_VFLIP |
|
|
V4L2_IN_ST_HFLIP;
|
|
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;
|
|
|
|
/* "Open the shutter" and set size, to start capture */
|
|
switch (gspca_dev->curr_mode) {
|
|
default:
|
|
/* case 2: */
|
|
gspca_dbg(gspca_dev, D_STREAM, "Start streaming at high resolution\n");
|
|
ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_HIGH);
|
|
break;
|
|
case 1:
|
|
gspca_dbg(gspca_dev, D_STREAM, "Start streaming at medium resolution\n");
|
|
ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_MED);
|
|
break;
|
|
case 0:
|
|
gspca_dbg(gspca_dev, D_STREAM, "Start streaming at low resolution\n");
|
|
ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_LOW);
|
|
}
|
|
|
|
if (ret < 0) {
|
|
gspca_err(gspca_dev, "Start streaming command failed\n");
|
|
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 struct usb_device_id device_table[] = {
|
|
{USB_DEVICE(0x2770, 0x9120)},
|
|
{}
|
|
};
|
|
|
|
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,
|
|
.reset_resume = gspca_resume,
|
|
#endif
|
|
};
|
|
|
|
module_usb_driver(sd_driver);
|