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V4L/DVB (10639): gspca - sq905: New subdriver.

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Add initial support for cameras based on the SQ Technologies SQ-905
chipset (USB ID 2770:9120) to V4L2 using the gspca infrastructure.
Currently only supports one resolution and doesn't attempt to inform
libv4l what image flipping options are needed.

Signed-off-by: Adam Baker <linux@baker-net.org.uk>
Signed-off-by: Theodore Kilgore <kilgota@auburn.edu>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Adam Baker 2009-02-06 15:12:46 -03:00 committed by Mauro Carvalho Chehab
parent 748c014889
commit 27d35fc3fb
3 changed files with 449 additions and 0 deletions
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9
drivers/media/video/gspca/Kconfig
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@ -176,6 +176,15 @@ config USB_GSPCA_SPCA561
To compile this driver as a module, choose M here: the
module will be called gspca_spca561.
config USB_GSPCA_SQ905
tristate "SQ Technologies SQ905 based USB Camera Driver"
depends on VIDEO_V4L2 && USB_GSPCA
help
Say Y here if you want support for cameras based on the SQ905 chip.
To compile this driver as a module, choose M here: the
module will be called gspca_sq905.
config USB_GSPCA_STK014
tristate "Syntek DV4000 (STK014) USB Camera Driver"
depends on VIDEO_V4L2 && USB_GSPCA

2
drivers/media/video/gspca/Makefile
View File

@ -16,6 +16,7 @@ obj-$(CONFIG_USB_GSPCA_SPCA505) += gspca_spca505.o
obj-$(CONFIG_USB_GSPCA_SPCA506) += gspca_spca506.o
obj-$(CONFIG_USB_GSPCA_SPCA508) += gspca_spca508.o
obj-$(CONFIG_USB_GSPCA_SPCA561) += gspca_spca561.o
obj-$(CONFIG_USB_GSPCA_SQ905) += gspca_sq905.o
obj-$(CONFIG_USB_GSPCA_SUNPLUS) += gspca_sunplus.o
obj-$(CONFIG_USB_GSPCA_STK014) += gspca_stk014.o
obj-$(CONFIG_USB_GSPCA_T613) += gspca_t613.o
@ -41,6 +42,7 @@ gspca_spca505-objs := spca505.o
gspca_spca506-objs := spca506.o
gspca_spca508-objs := spca508.o
gspca_spca561-objs := spca561.o
gspca_sq905-objs := sq905.o
gspca_stk014-objs := stk014.o
gspca_sunplus-objs := sunplus.o
gspca_t613-objs := t613.o

438
drivers/media/video/gspca/sq905.c Normal file
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@ -0,0 +1,438 @@
/*
* 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.
*
* 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
*/
/*
* History and Acknowledgments
*
* The original Linux driver for SQ905 based cameras was written by
* Marcell Lengyel and furter developed by many other contributers
* 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 MODULE_NAME "sq905"
#include <linux/workqueue.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 */
/* 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 */
/* note that the capture command also controls the output dimensions */
/* 0x60 -> 160x120, 0x61 -> 320x240 0x62 -> 640x480 depends on camera */
/* 0x62 is not correct, at least for some cams. Should be 0x63 ? */
/* Structure to hold all of our device specific stuff */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
u8 cam_type;
/*
* Driver stuff
*/
struct work_struct work_struct;
struct workqueue_struct *work_thread;
};
/* The driver only supports 320x240 so far. */
static struct v4l2_pix_format sq905_mode[1] = {
{ 320, 240, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
.bytesperline = 320,
.sizeimage = 320 * 240,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 0}
};
struct cam_type {
u32 ident_word;
char *name;
struct v4l2_pix_format *min_mode;
u8 num_modes;
u8 sensor_flags;
};
#define SQ905_FLIP_HORIZ (1 << 0)
#define SQ905_FLIP_VERT (1 << 1)
/* Last entry is default if nothing else matches */
static struct cam_type cam_types[] = {
{ 0x19010509, "PocketCam", &sq905_mode[0], 1, SQ905_FLIP_HORIZ },
{ 0x32010509, "Magpix", &sq905_mode[0], 1, SQ905_FLIP_HORIZ },
{ 0, "Default", &sq905_mode[0], 1, SQ905_FLIP_HORIZ | SQ905_FLIP_VERT }
};
/*
* 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) {
PDEBUG(D_ERR, "%s: usb_control_msg failed (%d)",
__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) {
PDEBUG(D_ERR, "%s: usb_control_msg failed 2 (%d)",
__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) {
PDEBUG(D_ERR, "%s: usb_control_msg failed (%d)", __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 ret;
int act_len;
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_BULK_READ, size, gspca_dev->usb_buf,
1, SQ905_CMD_TIMEOUT);
if (ret < 0) {
PDEBUG(D_ERR, "%s: usb_control_msg failed (%d)", __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) {
PDEBUG(D_ERR, "bulk read fail (%d) len %d/%d",
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 the camera's USB interface we take the gspca
* usb_lock when performing USB operations. In practice the only thing we need
* to protect against is the usb_set_interface call that gspca makes during
* stream_off as the camera doesn't provide any controls that the user could try
* to change.
*/
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;
struct gspca_frame *frame;
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 discarding; /* true if we failed to get space for frame. */
int packet_type;
int ret;
u8 *data;
u8 *buffer;
buffer = kmalloc(SQ905_MAX_TRANSFER, GFP_KERNEL | GFP_DMA);
mutex_lock(&gspca_dev->usb_lock);
if (!buffer) {
PDEBUG(D_ERR, "Couldn't allocate USB buffer");
goto quit_stream;
}
while (gspca_dev->present && gspca_dev->streaming) {
/* Need a short delay to ensure streaming flag was set by
* gspca and to make sure gspca can grab the mutex. */
mutex_unlock(&gspca_dev->usb_lock);
msleep(1);
/* request some data and then read it until we have
* a complete frame. */
bytes_left = sq905_mode[0].sizeimage + FRAME_HEADER_LEN;
header_read = 0;
discarding = 0;
while (bytes_left > 0) {
data_len = bytes_left > SQ905_MAX_TRANSFER ?
SQ905_MAX_TRANSFER : bytes_left;
mutex_lock(&gspca_dev->usb_lock);
if (!gspca_dev->present)
goto quit_stream;
ret = sq905_read_data(gspca_dev, buffer, data_len);
if (ret < 0)
goto quit_stream;
mutex_unlock(&gspca_dev->usb_lock);
PDEBUG(D_STREAM,
"Got %d bytes out of %d for frame",
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;
}
frame = gspca_get_i_frame(gspca_dev);
if (frame && !discarding)
gspca_frame_add(gspca_dev, packet_type,
frame, data, data_len);
else
discarding = 1;
}
/* acknowledge the frame */
mutex_lock(&gspca_dev->usb_lock);
if (!gspca_dev->present)
goto quit_stream;
ret = sq905_ack_frame(gspca_dev);
if (ret < 0)
goto quit_stream;
}
quit_stream:
/* the usb_lock is already acquired */
if (gspca_dev->present)
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;
cam->cam_mode = sq905_mode;
cam->nmodes = 1;
/* We don't use the buffer gspca allocates so make it small. */
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)
{
struct sd *dev = (struct sd *) 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);
if (ret < 0)
return ret;
/* usb_buf is allocated with kmalloc so is aligned. */
ident = le32_to_cpup((u32 *)gspca_dev->usb_buf);
ret = sq905_command(gspca_dev, SQ905_CLEAR);
if (ret < 0)
return ret;
dev->cam_type = 0;
while (dev->cam_type < ARRAY_SIZE(cam_types) - 1 &&
ident != cam_types[dev->cam_type].ident_word)
dev->cam_type++;
PDEBUG(D_CONF, "SQ905 camera %s, ID %08x detected",
cam_types[dev->cam_type].name, ident);
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 */
ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_MED);
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(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,
#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);