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kernel-fxtec-pro1x/drivers/media/video/gspca/pac207.c
Jean-Francois Moine 4aa0d037a6 V4L/DVB (8154): Fix protection problems in the main driver. 
- Protect format change when streaming active.
- Protect USB exchanges on close.
- Set a timeout in frame wait.
- Have only one capture file and free the resources when closing this file.
- Simplify the URB buffer.
- Don't reset the control values at open time in pac207.
- Fix compilation warnings of stk014.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-07-20 07:14:40 -03:00

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/*
* Pixart PAC207BCA library
*
* Copyright (C) 2008 Hans de Goede <j.w.r.degoede@hhs.nl>
* Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li
* Copyleft (C) 2005 Michel Xhaard mxhaard@magic.fr
*
* V4L2 by 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
* (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
*
*/
#define MODULE_NAME "pac207"
#include "gspca.h"
#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 1)
static const char version[] = "0.1.1";
MODULE_AUTHOR("Hans de Goede <j.w.r.degoede@hhs.nl>");
MODULE_DESCRIPTION("Pixart PAC207");
MODULE_LICENSE("GPL");
#define PAC207_CTRL_TIMEOUT 100 /* ms */
#define PAC207_BRIGHTNESS_MIN 0
#define PAC207_BRIGHTNESS_MAX 255
#define PAC207_BRIGHTNESS_DEFAULT 4 /* power on default: 4 */
#define PAC207_EXPOSURE_MIN 4
#define PAC207_EXPOSURE_MAX 26
#define PAC207_EXPOSURE_DEFAULT 4 /* power on default: 3 ?? */
#define PAC207_EXPOSURE_KNEE 11 /* 4 = 30 fps, 11 = 8, 15 = 6 */
#define PAC207_GAIN_MIN 0
#define PAC207_GAIN_MAX 31
#define PAC207_GAIN_DEFAULT 9 /* power on default: 9 */
#define PAC207_GAIN_KNEE 20
#define PAC207_AUTOGAIN_DEADZONE 30
/* We calculating the autogain at the end of the transfer of a frame, at this
moment a frame with the old settings is being transmitted, and a frame is
being captured with the old settings. So if we adjust the autogain we must
ignore atleast the 2 next frames for the new settings to come into effect
before doing any other adjustments */
#define PAC207_AUTOGAIN_IGNORE_FRAMES 3
enum pac207_line_state {
LINE_HEADER1,
LINE_HEADER2,
LINE_UNCOMPRESSED,
LINE_COMPRESSED,
};
struct pac207_decoder_state {
/* generic state */
u16 line_read;
u16 line_marker;
u8 line_state;
u8 header_read;
/* compression state */
u16 processed_bytes;
u8 remaining_bits;
s8 no_remaining_bits;
u8 get_abs;
u8 discard_byte;
u8 line_decode_buf[352];
};
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
struct pac207_decoder_state decoder_state;
u8 mode;
u8 brightness;
u8 exposure;
u8 autogain;
u8 gain;
u8 sof_read;
u8 autogain_ignore_frames;
atomic_t avg_lum;
};
/* V4L2 controls supported by the driver */
static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val);
static struct ctrl sd_ctrls[] = {
#define SD_BRIGHTNESS 0
{
{
.id = V4L2_CID_BRIGHTNESS,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Brightness",
.minimum = PAC207_BRIGHTNESS_MIN,
.maximum = PAC207_BRIGHTNESS_MAX,
.step = 1,
.default_value = PAC207_BRIGHTNESS_DEFAULT,
.flags = 0,
},
.set = sd_setbrightness,
.get = sd_getbrightness,
},
#define SD_EXPOSURE 1
{
{
.id = V4L2_CID_EXPOSURE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "exposure",
.minimum = PAC207_EXPOSURE_MIN,
.maximum = PAC207_EXPOSURE_MAX,
.step = 1,
.default_value = PAC207_EXPOSURE_DEFAULT,
.flags = 0,
},
.set = sd_setexposure,
.get = sd_getexposure,
},
#define SD_AUTOGAIN 2
{
{
.id = V4L2_CID_AUTOGAIN,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Auto Gain",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 1,
.flags = 0,
},
.set = sd_setautogain,
.get = sd_getautogain,
},
#define SD_GAIN 3
{
{
.id = V4L2_CID_GAIN,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "gain",
.minimum = PAC207_GAIN_MIN,
.maximum = PAC207_GAIN_MAX,
.step = 1,
.default_value = PAC207_GAIN_DEFAULT,
.flags = 0,
},
.set = sd_setgain,
.get = sd_getgain,
},
};
static struct cam_mode sif_mode[] = {
{V4L2_PIX_FMT_SBGGR8, 176, 144, 1},
{V4L2_PIX_FMT_SBGGR8, 352, 288, 0},
};
static const __u8 pac207_sensor_init[][8] = {
{0x10, 0x12, 0x0d, 0x12, 0x0c, 0x01, 0x29, 0xf0},
{0x00, 0x64, 0x64, 0x64, 0x04, 0x10, 0xf0, 0x30},
{0x00, 0x00, 0x00, 0x70, 0xa0, 0xf8, 0x00, 0x00},
{0x00, 0x00, 0x32, 0x00, 0x96, 0x00, 0xa2, 0x02},
{0x32, 0x00, 0x96, 0x00, 0xA2, 0x02, 0xaf, 0x00},
};
/* 48 reg_72 Rate Control end BalSize_4a =0x36 */
static const __u8 PacReg72[] = { 0x00, 0x00, 0x36, 0x00 };
static const char pac207_sof_marker[5] = { 0xff, 0xff, 0x00, 0xff, 0x96 };
int pac207_write_regs(struct gspca_dev *gspca_dev, u16 index,
const u8 *buffer, u16 length)
{
struct usb_device *udev = gspca_dev->dev;
int err;
u8 kbuf[8];
memcpy(kbuf, buffer, length);
err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x01,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
0x00, index, kbuf, length, PAC207_CTRL_TIMEOUT);
if (err < 0)
PDEBUG(D_ERR,
"Failed to write registers to index 0x%04X, error %d)",
index, err);
return err;
}
int pac207_write_reg(struct gspca_dev *gspca_dev, u16 index, u16 value)
{
struct usb_device *udev = gspca_dev->dev;
int err;
err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
value, index, NULL, 0, PAC207_CTRL_TIMEOUT);
if (err)
PDEBUG(D_ERR, "Failed to write a register (index 0x%04X,"
" value 0x%02X, error %d)", index, value, err);
return err;
}
int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index)
{
struct usb_device *udev = gspca_dev->dev;
u8 buff;
int res;
res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
0x00, index, &buff, 1, PAC207_CTRL_TIMEOUT);
if (res < 0) {
PDEBUG(D_ERR,
"Failed to read a register (index 0x%04X, error %d)",
index, res);
return res;
}
return buff;
}
/* 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;
struct cam *cam;
u8 idreg[2];
idreg[0] = pac207_read_reg(gspca_dev, 0x0000);
idreg[1] = pac207_read_reg(gspca_dev, 0x0001);
idreg[0] = ((idreg[0] & 0x0F) << 4) | ((idreg[1] & 0xf0) >> 4);
idreg[1] = idreg[1] & 0x0f;
PDEBUG(D_PROBE, "Pixart Sensor ID 0x%02X Chips ID 0x%02X",
idreg[0], idreg[1]);
if (idreg[0] != 0x27) {
PDEBUG(D_PROBE, "Error invalid sensor ID!");
return -ENODEV;
}
pac207_write_reg(gspca_dev, 0x41, 0x00);
/* Bit_0=Image Format,
* Bit_1=LED,
* Bit_2=Compression test mode enable */
pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
pac207_write_reg(gspca_dev, 0x11, 0x30); /* Analog Bias */
PDEBUG(D_PROBE,
"Pixart PAC207BCA Image Processor and Control Chip detected"
" (vid/pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
cam = &gspca_dev->cam;
cam->dev_name = (char *) id->driver_info;
cam->epaddr = 0x05;
cam->cam_mode = sif_mode;
cam->nmodes = ARRAY_SIZE(sif_mode);
sd->brightness = PAC207_BRIGHTNESS_DEFAULT;
sd->exposure = PAC207_EXPOSURE_DEFAULT;
sd->gain = PAC207_GAIN_DEFAULT;
return 0;
}
/* this function is called at open time */
static int sd_open(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
sd->autogain = 1;
return 0;
}
/* -- start the camera -- */
static void sd_start(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
__u8 mode;
pac207_write_reg(gspca_dev, 0x0f, 0x10); /* Power control (Bit 6-0) */
pac207_write_regs(gspca_dev, 0x0002, pac207_sensor_init[0], 8);
pac207_write_regs(gspca_dev, 0x000a, pac207_sensor_init[1], 8);
pac207_write_regs(gspca_dev, 0x0012, pac207_sensor_init[2], 8);
pac207_write_regs(gspca_dev, 0x0040, pac207_sensor_init[3], 8);
pac207_write_regs(gspca_dev, 0x0042, pac207_sensor_init[4], 8);
pac207_write_regs(gspca_dev, 0x0048, PacReg72, 4);
/* Compression Balance */
if (gspca_dev->width == 176)
pac207_write_reg(gspca_dev, 0x4a, 0xff);
else
pac207_write_reg(gspca_dev, 0x4a, 0x88);
pac207_write_reg(gspca_dev, 0x4b, 0x00); /* Sram test value */
pac207_write_reg(gspca_dev, 0x08, sd->brightness);
/* PGA global gain (Bit 4-0) */
pac207_write_reg(gspca_dev, 0x0e, sd->gain);
pac207_write_reg(gspca_dev, 0x02, sd->exposure); /* PXCK = 12MHz /n */
mode = 0x02; /* Image Format (Bit 0), LED (1), Compr. test mode (2) */
if (gspca_dev->width == 176) { /* 176x144 */
mode |= 0x01;
PDEBUG(D_STREAM, "pac207_start mode 176x144");
} else/* 352x288 */
PDEBUG(D_STREAM, "pac207_start mode 352x288");
pac207_write_reg(gspca_dev, 0x41, mode);
pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
udelay(1000); /* taken from gspca */
pac207_write_reg(gspca_dev, 0x40, 0x01); /* Start ISO pipe */
sd->sof_read = 0;
sd->autogain_ignore_frames = 0;
atomic_set(&sd->avg_lum, -1);
}
static void sd_stopN(struct gspca_dev *gspca_dev)
{
pac207_write_reg(gspca_dev, 0x40, 0x00); /* Stop ISO pipe */
pac207_write_reg(gspca_dev, 0x41, 0x00); /* Turn of LED */
pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
}
static void sd_stop0(struct gspca_dev *gspca_dev)
{
}
/* this function is called at close time */
static void sd_close(struct gspca_dev *gspca_dev)
{
}
/* -- convert pixart frames to Bayer -- */
/* Sonix decompressor struct B.S.(2004) */
static struct {
u8 is_abs;
u8 len;
s8 val;
} table[256];
void init_pixart_decoder(void)
{
int i, is_abs, val, len;
for (i = 0; i < 256; i++) {
is_abs = 0;
val = 0;
len = 0;
if ((i & 0xC0) == 0) {
/* code 00 */
val = 0;
len = 2;
} else if ((i & 0xC0) == 0x40) {
/* code 01 */
val = -5;
len = 2;
} else if ((i & 0xC0) == 0x80) {
/* code 10 */
val = 5;
len = 2;
} else if ((i & 0xF0) == 0xC0) {
/* code 1100 */
val = -10;
len = 4;
} else if ((i & 0xF0) == 0xD0) {
/* code 1101 */
val = 10;
len = 4;
} else if ((i & 0xF8) == 0xE0) {
/* code 11100 */
val = -15;
len = 5;
} else if ((i & 0xF8) == 0xE8) {
/* code 11101 */
val = 15;
len = 5;
} else if ((i & 0xFC) == 0xF0) {
/* code 111100 */
val = -20;
len = 6;
} else if ((i & 0xFC) == 0xF4) {
/* code 111101 */
val = 20;
len = 6;
} else if ((i & 0xF8) == 0xF8) {
/* code 11111xxxxxx */
is_abs = 1;
val = 0;
len = 5;
}
table[i].is_abs = is_abs;
table[i].val = val;
table[i].len = len;
}
}
/* auto gain and exposure algorithm based on the knee algorithm described here:
http://ytse.tricolour.net/docs/LowLightOptimization.html */
static void pac207_do_auto_gain(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int i, steps, desired_avg_lum;
int orig_gain = sd->gain;
int orig_exposure = sd->exposure;
int avg_lum = atomic_read(&sd->avg_lum);
if (!sd->autogain || avg_lum == -1)
return;
if (sd->autogain_ignore_frames > 0) {
sd->autogain_ignore_frames--;
return;
}
/* correct desired lumination for the configured brightness */
desired_avg_lum = 100 + sd->brightness / 2;
/* If we are of a multiple of deadzone, do multiple step to reach the
desired lumination fast (with the risc of a slight overshoot) */
steps = abs(desired_avg_lum - avg_lum) / PAC207_AUTOGAIN_DEADZONE;
for (i = 0; i < steps; i++) {
if (avg_lum > desired_avg_lum) {
if (sd->gain > PAC207_GAIN_KNEE) {
sd->gain--;
} else if (sd->exposure > PAC207_EXPOSURE_KNEE) {
sd->exposure--;
} else if (sd->gain > PAC207_GAIN_DEFAULT) {
sd->gain--;
} else if (sd->exposure > PAC207_EXPOSURE_MIN) {
sd->exposure--;
} else if (sd->gain > PAC207_GAIN_MIN) {
sd->gain--;
} else
break;
} else {
if (sd->gain < PAC207_GAIN_DEFAULT) {
sd->gain++;
} else if (sd->exposure < PAC207_EXPOSURE_KNEE) {
sd->exposure++;
} else if (sd->gain < PAC207_GAIN_KNEE) {
sd->gain++;
} else if (sd->exposure < PAC207_EXPOSURE_MAX) {
sd->exposure++;
} else if (sd->gain < PAC207_GAIN_MAX) {
sd->gain++;
} else
break;
}
}
if (sd->exposure != orig_exposure || sd->gain != orig_gain) {
if (sd->exposure != orig_exposure)
pac207_write_reg(gspca_dev, 0x0002, sd->exposure);
if (sd->gain != orig_gain)
pac207_write_reg(gspca_dev, 0x000e, sd->gain);
pac207_write_reg(gspca_dev, 0x13, 0x01); /* load reg to sen */
pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
sd->autogain_ignore_frames = PAC207_AUTOGAIN_IGNORE_FRAMES;
}
}
static unsigned char *pac207_find_sof(struct gspca_dev *gspca_dev,
unsigned char *m, int len)
{
struct sd *sd = (struct sd *) gspca_dev;
int i;
/* Search for the SOF marker (fixed part) in the header */
for (i = 0; i < len; i++) {
if (m[i] == pac207_sof_marker[sd->sof_read]) {
sd->sof_read++;
if (sd->sof_read == sizeof(pac207_sof_marker)) {
PDEBUG(D_STREAM,
"SOF found, bytes to analyze: %u."
" Frame starts at byte #%u",
len, i + 1);
sd->sof_read = 0;
return m + i + 1;
}
} else
sd->sof_read = 0;
}
return NULL;
}
static int pac207_decompress_row(struct gspca_dev *gspca_dev,
struct gspca_frame *f, unsigned char *cdata, int len)
{
struct sd *sd = (struct sd *) gspca_dev;
struct pac207_decoder_state *decoder_state = &sd->decoder_state;
unsigned char *outp = decoder_state->line_decode_buf +
decoder_state->line_read;
int val, bitlen, bitpos = -decoder_state->no_remaining_bits;
u8 code;
/* first two pixels are stored as raw 8-bit */
while (decoder_state->line_read < 2) {
*outp++ = *cdata++;
decoder_state->line_read++;
len--;
if (len == 0)
return 0;
}
while (decoder_state->line_read < gspca_dev->width) {
if (bitpos < 0) {
code = decoder_state->remaining_bits << (8 + bitpos) |
cdata[0] >> -bitpos;
} else {
u8 *addr = cdata + bitpos / 8;
code = addr[0] << (bitpos & 7) |
addr[1] >> (8 - (bitpos & 7));
}
bitlen = decoder_state->get_abs ?
6 : table[code].len;
/* Stop decompressing if we're out of input data */
if ((bitpos + bitlen) > (len * 8))
break;
if (decoder_state->get_abs) {
*outp++ = code & 0xFC;
decoder_state->line_read++;
decoder_state->get_abs = 0;
} else {
if (table[code].is_abs)
decoder_state->get_abs = 1;
else {
/* relative to left pixel */
val = outp[-2] +
table[code].val;
if (val > 0xff)
val = 0xff;
else if (val < 0)
val = 0;
*outp++ = val;
decoder_state->line_read++;
}
}
bitpos += bitlen;
}
if (decoder_state->line_read == gspca_dev->width) {
int compressed_line_len;
gspca_frame_add(gspca_dev, INTER_PACKET, f,
decoder_state->line_decode_buf,
gspca_dev->width);
/* completely decompressed line, round pos to nearest word */
compressed_line_len = ((decoder_state->processed_bytes * 8 +
bitpos + 15) / 16) * 2;
len -= compressed_line_len - decoder_state->processed_bytes;
if (len < 0) {
decoder_state->discard_byte = 1;
len = 0;
}
} else {
decoder_state->processed_bytes += len;
decoder_state->remaining_bits = cdata[bitpos/8];
decoder_state->no_remaining_bits = (8 - bitpos) & 7;
len = 0;
}
return len;
}
static void pac207_decode_line_init(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
struct pac207_decoder_state *decoder_state = &sd->decoder_state;
decoder_state->line_read = 0;
decoder_state->line_state = LINE_HEADER1;
decoder_state->processed_bytes = 0;
decoder_state->no_remaining_bits = 0;
decoder_state->get_abs = 0;
}
static void pac207_decode_frame_init(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
struct pac207_decoder_state *decoder_state = &sd->decoder_state;
decoder_state->header_read = 0;
decoder_state->discard_byte = 0;
pac207_decode_line_init(gspca_dev);
}
static int pac207_decode_frame_data(struct gspca_dev *gspca_dev,
struct gspca_frame *f, unsigned char *data, int len)
{
struct sd *sd = (struct sd *) gspca_dev;
struct pac207_decoder_state *decoder_state = &sd->decoder_state;
int needed = 0;
/* first 11 bytes after sof marker: frame header */
if (decoder_state->header_read < 11) {
/* get average lumination from frame header (byte 5) */
if (decoder_state->header_read < 5) {
needed = 5 - decoder_state->header_read;
if (len >= needed)
atomic_set(&sd->avg_lum, data[needed-1]);
}
/* skip the rest of the header */
needed = 11 - decoder_state->header_read;
if (len <= needed) {
decoder_state->header_read += len;
return 0;
}
data += needed;
len -= needed;
decoder_state->header_read = 11;
}
while (len) {
if (decoder_state->discard_byte) {
data++;
len--;
decoder_state->discard_byte = 0;
continue;
}
switch (decoder_state->line_state) {
case LINE_HEADER1:
decoder_state->line_marker = data[0] << 8;
decoder_state->line_state = LINE_HEADER2;
needed = 1;
break;
case LINE_HEADER2:
decoder_state->line_marker |= data[0];
switch (decoder_state->line_marker) {
case 0x0FF0:
decoder_state->line_state = LINE_UNCOMPRESSED;
break;
case 0x1EE1:
decoder_state->line_state = LINE_COMPRESSED;
break;
default:
PDEBUG(D_STREAM,
"Error unknown line-header %04X",
(int) decoder_state->line_marker);
gspca_dev->last_packet_type = DISCARD_PACKET;
return 0;
}
needed = 1;
break;
case LINE_UNCOMPRESSED:
needed = gspca_dev->width - decoder_state->line_read;
if (needed > len)
needed = len;
gspca_frame_add(gspca_dev, INTER_PACKET, f, data,
needed);
decoder_state->line_read += needed;
break;
case LINE_COMPRESSED:
needed = len -
pac207_decompress_row(gspca_dev, f, data, len);
break;
}
data += needed;
len -= needed;
if (decoder_state->line_read == gspca_dev->width) {
if ((f->data_end - f->data) ==
(gspca_dev->width * gspca_dev->height)) {
/* eureka we've got a frame */
return 1;
}
pac207_decode_line_init(gspca_dev);
}
}
return 0;
}
static void sd_pkt_scan(struct gspca_dev *gspca_dev,
struct gspca_frame *frame,
unsigned char *data,
int len)
{
unsigned char *sof;
int n;
sof = pac207_find_sof(gspca_dev, data, len);
if (sof) {
/* finish decoding current frame */
if (gspca_dev->last_packet_type == INTER_PACKET) {
n = sof - data;
if (n > sizeof(pac207_sof_marker))
n -= sizeof(pac207_sof_marker);
else
n = 0;
n = pac207_decode_frame_data(gspca_dev, frame,
data, n);
if (n)
frame = gspca_frame_add(gspca_dev,
LAST_PACKET,
frame,
NULL,
0);
else
PDEBUG(D_STREAM, "Incomplete frame");
}
pac207_decode_frame_init(gspca_dev);
gspca_frame_add(gspca_dev, FIRST_PACKET, frame, NULL,
0);
len -= sof - data;
data = sof;
}
if (gspca_dev->last_packet_type == DISCARD_PACKET)
return;
n = pac207_decode_frame_data(gspca_dev, frame, data, len);
if (n)
frame = gspca_frame_add(gspca_dev, LAST_PACKET,
frame, NULL, 0);
}
static void setbrightness(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
pac207_write_reg(gspca_dev, 0x08, sd->brightness);
pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
}
static void setexposure(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
pac207_write_reg(gspca_dev, 0x02, sd->exposure);
pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
}
static void setgain(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
pac207_write_reg(gspca_dev, 0x0e, sd->gain);
pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
}
static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
sd->brightness = val;
if (gspca_dev->streaming)
setbrightness(gspca_dev);
return 0;
}
static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
*val = sd->brightness;
return 0;
}
static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
/* don't allow mucking with exposure when using autogain */
if (sd->autogain)
return -EINVAL;
sd->exposure = val;
if (gspca_dev->streaming)
setexposure(gspca_dev);
return 0;
}
static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
*val = sd->exposure;
return 0;
}
static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
/* don't allow mucking with gain when using autogain */
if (sd->autogain)
return -EINVAL;
sd->gain = val;
if (gspca_dev->streaming)
setgain(gspca_dev);
return 0;
}
static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
*val = sd->gain;
return 0;
}
static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
sd->autogain = val;
/* when switching to autogain set defaults to make sure
we are on a valid point of the autogain gain /
exposure knee graph, and give this change time to
take effect before doing autogain. */
if (sd->autogain) {
sd->exposure = PAC207_EXPOSURE_DEFAULT;
sd->gain = PAC207_GAIN_DEFAULT;
if (gspca_dev->streaming) {
sd->autogain_ignore_frames =
PAC207_AUTOGAIN_IGNORE_FRAMES;
setexposure(gspca_dev);
setgain(gspca_dev);
}
}
return 0;
}
static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
*val = sd->autogain;
return 0;
}
/* sub-driver description */
static struct sd_desc sd_desc = {
.name = MODULE_NAME,
.ctrls = sd_ctrls,
.nctrls = ARRAY_SIZE(sd_ctrls),
.config = sd_config,
.open = sd_open,
.start = sd_start,
.stopN = sd_stopN,
.stop0 = sd_stop0,
.close = sd_close,
.dq_callback = pac207_do_auto_gain,
.pkt_scan = sd_pkt_scan,
};
/* -- module initialisation -- */
#define DVNM(name) .driver_info = (kernel_ulong_t) name
static __devinitdata struct usb_device_id device_table[] = {
{USB_DEVICE(0x041e, 0x4028), DVNM("Creative Webcam Vista Plus")},
{USB_DEVICE(0x093a, 0x2460), DVNM("PAC207 Qtec Webcam 100")},
{USB_DEVICE(0x093a, 0x2463), DVNM("Philips spc200nc pac207")},
{USB_DEVICE(0x093a, 0x2464), DVNM("Labtec Webcam 1200")},
{USB_DEVICE(0x093a, 0x2468), DVNM("PAC207")},
{USB_DEVICE(0x093a, 0x2470), DVNM("Genius GF112")},
{USB_DEVICE(0x093a, 0x2471), DVNM("PAC207 Genius VideoCam ge111")},
{USB_DEVICE(0x093a, 0x2472), DVNM("PAC207 Genius VideoCam ge110")},
{USB_DEVICE(0x2001, 0xf115), DVNM("D-Link DSB-C120")},
{}
};
MODULE_DEVICE_TABLE(usb, device_table);
/* -- device connect -- */
static int sd_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
PDEBUG(D_PROBE, "camera probe");
return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd));
}
static struct usb_driver sd_driver = {
.name = MODULE_NAME,
.id_table = device_table,
.probe = sd_probe,
.disconnect = gspca_disconnect,
};
/* -- module insert / remove -- */
static int __init sd_mod_init(void)
{
init_pixart_decoder();
if (usb_register(&sd_driver) < 0)
return -1;
PDEBUG(D_PROBE, "v%s registered", version);
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);
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