- 根目录:
- drivers
- media
- video
- gspca
- stk014.c
/*
* Syntek DV4000 (STK014) subdriver
*
* Copyright (C) 2008 Jean-Francois Moine (http://moinejf.free.fr)
*
* 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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define MODULE_NAME "stk014"
#include "gspca.h"
#include "jpeg.h"
MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
MODULE_DESCRIPTION("Syntek DV4000 (STK014) USB Camera Driver");
MODULE_LICENSE("GPL");
/* controls */
enum e_ctrl {
BRIGHTNESS,
CONTRAST,
COLORS,
LIGHTFREQ,
NCTRLS /* number of controls */
};
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
struct gspca_ctrl ctrls[NCTRLS];
u8 quality;
#define QUALITY_MIN 70
#define QUALITY_MAX 95
#define QUALITY_DEF 88
u8 jpeg_hdr[JPEG_HDR_SZ];
};
/* V4L2 controls supported by the driver */
static void setbrightness(struct gspca_dev *gspca_dev);
static void setcontrast(struct gspca_dev *gspca_dev);
static void setcolors(struct gspca_dev *gspca_dev);
static void setlightfreq(struct gspca_dev *gspca_dev);
static const struct ctrl sd_ctrls[NCTRLS] = {
[BRIGHTNESS] = {
{
.id = V4L2_CID_BRIGHTNESS,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Brightness",
.minimum = 0,
.maximum = 255,
.step = 1,
.default_value = 127,
},
.set_control = setbrightness
},
[CONTRAST] = {
{
.id = V4L2_CID_CONTRAST,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Contrast",
.minimum = 0,
.maximum = 255,
.step = 1,
.default_value = 127,
},
.set_control = setcontrast
},
[COLORS] = {
{
.id = V4L2_CID_SATURATION,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Color",
.minimum = 0,
.maximum = 255,
.step = 1,
.default_value = 127,
},
.set_control = setcolors
},
[LIGHTFREQ] = {
{
.id = V4L2_CID_POWER_LINE_FREQUENCY,
.type = V4L2_CTRL_TYPE_MENU,
.name = "Light frequency filter",
.minimum = 1,
.maximum = 2, /* 0: 0, 1: 50Hz, 2:60Hz */
.step = 1,
.default_value = 1,
},
.set_control = setlightfreq
},
};
static const struct v4l2_pix_format vga_mode[] = {
{320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
.bytesperline = 320,
.sizeimage = 320 * 240 * 3 / 8 + 590,
.colorspace = V4L2_COLORSPACE_JPEG,
.priv = 1},
{640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
.bytesperline = 640,
.sizeimage = 640 * 480 * 3 / 8 + 590,
.colorspace = V4L2_COLORSPACE_JPEG,
.priv = 0},
};
/* -- read a register -- */
static u8 reg_r(struct gspca_dev *gspca_dev,
__u16 index)
{
struct usb_device *dev = gspca_dev->dev;
int ret;
if (gspca_dev->usb_err < 0)
return 0;
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
0x00,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0x00,
index,
gspca_dev->usb_buf, 1,
500);
if (ret < 0) {
pr_err("reg_r err %d\n", ret);
gspca_dev->usb_err = ret;
return 0;
}
return gspca_dev->usb_buf[0];
}
/* -- write a register -- */
static void reg_w(struct gspca_dev *gspca_dev,
__u16 index, __u16 value)
{
struct usb_device *dev = gspca_dev->dev;
int ret;
if (gspca_dev->usb_err < 0)
return;
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
0x01,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value,
index,
NULL,
0,
500);
if (ret < 0) {
pr_err("reg_w err %d\n", ret);
gspca_dev->usb_err = ret;
}
}
/* -- get a bulk value (4 bytes) -- */
static void rcv_val(struct gspca_dev *gspca_dev,
int ads)
{
struct usb_device *dev = gspca_dev->dev;
int alen, ret;
reg_w(gspca_dev, 0x634, (ads >> 16) & 0xff);
reg_w(gspca_dev, 0x635, (ads >> 8) & 0xff);
reg_w(gspca_dev, 0x636, ads & 0xff);
reg_w(gspca_dev, 0x637, 0);
reg_w(gspca_dev, 0x638, 4); /* len & 0xff */
reg_w(gspca_dev, 0x639, 0); /* len >> 8 */
reg_w(gspca_dev, 0x63a, 0);
reg_w(gspca_dev, 0x63b, 0);
reg_w(gspca_dev, 0x630, 5);
if (gspca_dev->usb_err < 0)
return;
ret = usb_bulk_msg(dev,
usb_rcvbulkpipe(dev, 0x05),
gspca_dev->usb_buf,
4, /* length */
&alen,
500); /* timeout in milliseconds */
if (ret < 0) {
pr_err("rcv_val err %d\n", ret);
gspca_dev->usb_err = ret;
}
}
/* -- send a bulk value -- */
static void snd_val(struct gspca_dev *gspca_dev,
int ads,
unsigned int val)
{
struct usb_device *dev = gspca_dev->dev;
int alen, ret;
__u8 seq = 0;
if (ads == 0x003f08) {
reg_r(gspca_dev, 0x0704);
seq = reg_r(gspca_dev, 0x0705);
reg_r(gspca_dev, 0x0650);
reg_w(gspca_dev, 0x654, seq);
} else {
reg_w(gspca_dev, 0x654, (ads >> 16) & 0xff);
}
reg_w(gspca_dev, 0x655, (ads >> 8) & 0xff);
reg_w(gspca_dev, 0x656, ads & 0xff);
reg_w(gspca_dev, 0x657, 0);
reg_w(gspca_dev, 0x658, 0x04); /* size */
reg_w(gspca_dev, 0x659, 0);
reg_w(gspca_dev, 0x65a, 0);
reg_w(gspca_dev, 0x65b, 0);
reg_w(gspca_dev, 0x650, 5);
if (gspca_dev->usb_err < 0)
return;
gspca_dev->usb_buf[0] = val >> 24;
gspca_dev->usb_buf[1] = val >> 16;
gspca_dev->usb_buf[2] = val >> 8;
gspca_dev->usb_buf[3] = val;
ret = usb_bulk_msg(dev,
usb_sndbulkpipe(dev, 6),
gspca_dev->usb_buf,
4,
&alen,
500); /* timeout in milliseconds */
if (ret < 0) {
pr_err("snd_val err %d\n", ret);
gspca_dev->usb_err = ret;
} else {
if (ads == 0x003f08) {
seq += 4;
seq &= 0x3f;
reg_w(gspca_dev, 0x705, seq);
}
}
}
/* set a camera parameter */
static void set_par(struct gspca_dev *gspca_dev,
int parval)
{
snd_val(gspca_dev, 0x003f08, parval);
}
static void setbrightness(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int parval;
parval = 0x06000000 /* whiteness */
+ (sd->ctrls[BRIGHTNESS].val << 16);
set_par(gspca_dev, parval);
}
static void setcontrast(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int parval;
parval = 0x07000000 /* contrast */
+ (sd->ctrls[CONTRAST].val << 16);
set_par(gspca_dev, parval);
}
static void setcolors(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int parval;
parval = 0x08000000 /* saturation */
+ (sd->ctrls[COLORS].val << 16);
set_par(gspca_dev, parval);
}
static void setlightfreq(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
set_par(gspca_dev, sd->ctrls[LIGHTFREQ].val == 1
? 0x33640000 /* 50 Hz */
: 0x33780000); /* 60 Hz */
}
/* this function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
const struct usb_device_id *id)
{
struct sd *sd = (struct sd *) gspca_dev;
gspca_dev->cam.cam_mode = vga_mode;
gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
gspca_dev->cam.ctrls = sd->ctrls;
sd->quality = QUALITY_DEF;
return 0;
}
/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
u8 ret;
/* check if the device responds */
usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
ret = reg_r(gspca_dev, 0x0740);
if (gspca_dev->usb_err >= 0) {
if (ret != 0xff) {
pr_err("init reg: 0x%02x\n", ret);
gspca_dev->usb_err = -EIO;
}
}
return gspca_dev->usb_err;
}
/* -- start the camera -- */
static int sd_start(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int ret, value;
/* create the JPEG header */
jpeg_define(sd->jpeg_hdr, gspca_dev->height, gspca_dev->width,
0x22); /* JPEG 411 */
jpeg_set_qual(sd->jpeg_hdr, sd->quality);
/* work on alternate 1 */
usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
set_par(gspca_dev, 0x10000000);
set_par(gspca_dev, 0x00000000);
set_par(gspca_dev, 0x8002e001);
set_par(gspca_dev, 0x14000000);
if (gspca_dev->width > 320)
value = 0x8002e001; /* 640x480 */
else
value = 0x4001f000; /* 320x240 */
set_par(gspca_dev, value);
ret = usb_set_interface(gspca_dev->dev,
gspca_dev->iface,
gspca_dev->alt);
if (ret < 0) {
pr_err("set intf %d %d failed\n",
gspca_dev->iface, gspca_dev->alt);
gspca_dev->usb_err = ret;
goto out;
}
reg_r(gspca_dev, 0x0630);
rcv_val(gspca_dev, 0x000020); /* << (value ff ff ff ff) */
reg_r(gspca_dev, 0x0650);
snd_val(gspca_dev, 0x000020, 0xffffffff);
reg_w(gspca_dev, 0x0620, 0);
reg_w(gspca_dev, 0x0630, 0);
reg_w(gspca_dev, 0x0640, 0);
reg_w(gspca_dev, 0x0650, 0);
reg_w(gspca_dev, 0x0660, 0);
setbrightness(gspca_dev); /* whiteness */
setcontrast(gspca_dev); /* contrast */
setcolors(gspca_dev); /* saturation */
set_par(gspca_dev, 0x09800000); /* Red ? */
set_par(gspca_dev, 0x0a800000); /* Green ? */
set_par(gspca_dev, 0x0b800000); /* Blue ? */
set_par(gspca_dev, 0x0d030000); /* Gamma ? */
setlightfreq(gspca_dev);
/* start the video flow */
set_par(gspca_dev, 0x01000000);
set_par(gspca_dev, 0x01000000);
if (gspca_dev->usb_err >= 0)
PDEBUG(D_STREAM, "camera started alt: 0x%02x",
gspca_dev->alt);
out:
return gspca_dev->usb_err;
}
static void sd_stopN(struct gspca_dev *gspca_dev)
{
struct usb_device *dev = gspca_dev->dev;
set_par(gspca_dev, 0x02000000);
set_par(gspca_dev, 0x02000000);
usb_set_interface(dev, gspca_dev->iface, 1);
reg_r(gspca_dev, 0x0630);
rcv_val(gspca_dev, 0x000020); /* << (value ff ff ff ff) */
reg_r(gspca_dev, 0x0650);
snd_val(gspca_dev, 0x000020, 0xffffffff);
reg_w(gspca_dev, 0x0620, 0);
reg_w(gspca_dev, 0x0630, 0);
reg_w(gspca_dev, 0x0640, 0);
reg_w(gspca_dev, 0x0650, 0);
reg_w(gspca_dev, 0x0660, 0);
PDEBUG(D_STREAM, "camera stopped");
}
static void sd_pkt_scan(struct gspca_dev *gspca_dev,
u8 *data, /* isoc packet */
int len) /* iso packet length */
{
struct sd *sd = (struct sd *) gspca_dev;
static unsigned char ffd9[] = {0xff, 0xd9};
/* a frame starts with:
* - 0xff 0xfe
* - 0x08 0x00 - length (little endian ?!)
* - 4 bytes = size of whole frame (BE - including header)
* - 0x00 0x0c
* - 0xff 0xd8
* - .. JPEG image with escape sequences (ff 00)
* (without ending - ff d9)
*/
if (data[0] == 0xff && data[1] == 0xfe) {
gspca_frame_add(gspca_dev, LAST_PACKET,
ffd9, 2);
/* put the JPEG 411 header */
gspca_frame_add(gspca_dev, FIRST_PACKET,
sd->jpeg_hdr, JPEG_HDR_SZ);
/* beginning of the frame */
#define STKHDRSZ 12
data += STKHDRSZ;
len -= STKHDRSZ;
}
gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
}
static int sd_querymenu(struct gspca_dev *gspca_dev,
struct v4l2_querymenu *menu)
{
static const char *freq_nm[3] = {"NoFliker", "50 Hz", "60 Hz"};
switch (menu->id) {
case V4L2_CID_POWER_LINE_FREQUENCY:
if ((unsigned) menu->index >= ARRAY_SIZE(freq_nm))
break;
strcpy((char *) menu->name, freq_nm[menu->index]);
return 0;
}
return -EINVAL;
}
static int sd_set_jcomp(struct gspca_dev *gspca_dev,
struct v4l2_jpegcompression *jcomp)
{
struct sd *sd = (struct sd *) gspca_dev;
if (jcomp->quality < QUALITY_MIN)
sd->quality = QUALITY_MIN;
else if (jcomp->quality > QUALITY_MAX)
sd->quality = QUALITY_MAX;
else
sd->quality = jcomp->quality;
if (gspca_dev->streaming)
jpeg_set_qual(sd->jpeg_hdr, sd->quality);
return gspca_dev->usb_err;
}
static int sd_get_jcomp(struct gspca_dev *gspca_dev,
struct v4l2_jpegcompression *jcomp)
{
struct sd *sd = (struct sd *) gspca_dev;
memset(jcomp, 0, sizeof *jcomp);
jcomp->quality = sd->quality;
jcomp->jpeg_markers = V4L2_JPEG_MARKER_DHT
| V4L2_JPEG_MARKER_DQT;
return 0;
}
/* sub-driver description */
static const struct sd_desc sd_desc = {
.name = MODULE_NAME,
.ctrls = sd_ctrls,
.nctrls = NCTRLS,
.config = sd_config,
.init = sd_init,
.start = sd_start,
.stopN = sd_stopN,
.pkt_scan = sd_pkt_scan,
.querymenu = sd_querymenu,
.get_jcomp = sd_get_jcomp,
.set_jcomp = sd_set_jcomp,
};
/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
{USB_DEVICE(0x05e1, 0x0893)},
{}
};
MODULE_DEVICE_TABLE(usb, device_table);
/* -- 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_usb_driver(sd_driver);