- 根目录:
- drivers
- media
- usb
- gspca
- stv06xx
- stv06xx_hdcs.c
/*
* Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
* Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
* Copyright (c) 2002, 2003 Tuukka Toivonen
* Copyright (c) 2008 Erik Andrén
* Copyright (c) 2008 Chia-I Wu
*
* 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
*
* P/N 861037: Sensor HDCS1000 ASIC STV0600
* P/N 861050-0010: Sensor HDCS1000 ASIC STV0600
* P/N 861050-0020: Sensor Photobit PB100 ASIC STV0600-1 - QuickCam Express
* P/N 861055: Sensor ST VV6410 ASIC STV0610 - LEGO cam
* P/N 861075-0040: Sensor HDCS1000 ASIC
* P/N 961179-0700: Sensor ST VV6410 ASIC STV0602 - Dexxa WebCam USB
* P/N 861040-0000: Sensor ST VV6410 ASIC STV0610 - QuickCam Web
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include "stv06xx_hdcs.h"
static struct v4l2_pix_format hdcs1x00_mode[] = {
{
HDCS_1X00_DEF_WIDTH,
HDCS_1X00_DEF_HEIGHT,
V4L2_PIX_FMT_SGRBG8,
V4L2_FIELD_NONE,
.sizeimage =
HDCS_1X00_DEF_WIDTH * HDCS_1X00_DEF_HEIGHT,
.bytesperline = HDCS_1X00_DEF_WIDTH,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 1
}
};
static struct v4l2_pix_format hdcs1020_mode[] = {
{
HDCS_1020_DEF_WIDTH,
HDCS_1020_DEF_HEIGHT,
V4L2_PIX_FMT_SGRBG8,
V4L2_FIELD_NONE,
.sizeimage =
HDCS_1020_DEF_WIDTH * HDCS_1020_DEF_HEIGHT,
.bytesperline = HDCS_1020_DEF_WIDTH,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 1
}
};
enum hdcs_power_state {
HDCS_STATE_SLEEP,
HDCS_STATE_IDLE,
HDCS_STATE_RUN
};
/* no lock? */
struct hdcs {
enum hdcs_power_state state;
int w, h;
/* visible area of the sensor array */
struct {
int left, top;
int width, height;
int border;
} array;
struct {
/* Column timing overhead */
u8 cto;
/* Column processing overhead */
u8 cpo;
/* Row sample period constant */
u16 rs;
/* Exposure reset duration */
u16 er;
} exp;
int psmp;
};
static int hdcs_reg_write_seq(struct sd *sd, u8 reg, u8 *vals, u8 len)
{
u8 regs[I2C_MAX_BYTES * 2];
int i;
if (unlikely((len <= 0) || (len >= I2C_MAX_BYTES) ||
(reg + len > 0xff)))
return -EINVAL;
for (i = 0; i < len; i++) {
regs[2 * i] = reg;
regs[2 * i + 1] = vals[i];
/* All addresses are shifted left one bit
* as bit 0 toggles r/w */
reg += 2;
}
return stv06xx_write_sensor_bytes(sd, regs, len);
}
static int hdcs_set_state(struct sd *sd, enum hdcs_power_state state)
{
struct hdcs *hdcs = sd->sensor_priv;
u8 val;
int ret;
if (hdcs->state == state)
return 0;
/* we need to go idle before running or sleeping */
if (hdcs->state != HDCS_STATE_IDLE) {
ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
if (ret)
return ret;
}
hdcs->state = HDCS_STATE_IDLE;
if (state == HDCS_STATE_IDLE)
return 0;
switch (state) {
case HDCS_STATE_SLEEP:
val = HDCS_SLEEP_MODE;
break;
case HDCS_STATE_RUN:
val = HDCS_RUN_ENABLE;
break;
default:
return -EINVAL;
}
ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), val);
/* Update the state if the write succeeded */
if (!ret)
hdcs->state = state;
return ret;
}
static int hdcs_reset(struct sd *sd)
{
struct hdcs *hdcs = sd->sensor_priv;
int err;
err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 1);
if (err < 0)
return err;
err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
if (err < 0)
hdcs->state = HDCS_STATE_IDLE;
return err;
}
static int hdcs_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
struct hdcs *hdcs = sd->sensor_priv;
int rowexp, srowexp;
int max_srowexp;
/* Column time period */
int ct;
/* Column processing period */
int cp;
/* Row processing period */
int rp;
/* Minimum number of column timing periods
within the column processing period */
int mnct;
int cycles, err;
u8 exp[14];
cycles = val * HDCS_CLK_FREQ_MHZ * 257;
ct = hdcs->exp.cto + hdcs->psmp + (HDCS_ADC_START_SIG_DUR + 2);
cp = hdcs->exp.cto + (hdcs->w * ct / 2);
/* the cycles one row takes */
rp = hdcs->exp.rs + cp;
rowexp = cycles / rp;
/* the remaining cycles */
cycles -= rowexp * rp;
/* calculate sub-row exposure */
if (IS_1020(sd)) {
/* see HDCS-1020 datasheet 3.5.6.4, p. 63 */
srowexp = hdcs->w - (cycles + hdcs->exp.er + 13) / ct;
mnct = (hdcs->exp.er + 12 + ct - 1) / ct;
max_srowexp = hdcs->w - mnct;
} else {
/* see HDCS-1000 datasheet 3.4.5.5, p. 61 */
srowexp = cp - hdcs->exp.er - 6 - cycles;
mnct = (hdcs->exp.er + 5 + ct - 1) / ct;
max_srowexp = cp - mnct * ct - 1;
}
if (srowexp < 0)
srowexp = 0;
else if (srowexp > max_srowexp)
srowexp = max_srowexp;
if (IS_1020(sd)) {
exp[0] = HDCS20_CONTROL;
exp[1] = 0x00; /* Stop streaming */
exp[2] = HDCS_ROWEXPL;
exp[3] = rowexp & 0xff;
exp[4] = HDCS_ROWEXPH;
exp[5] = rowexp >> 8;
exp[6] = HDCS20_SROWEXP;
exp[7] = (srowexp >> 2) & 0xff;
exp[8] = HDCS20_ERROR;
exp[9] = 0x10; /* Clear exposure error flag*/
exp[10] = HDCS20_CONTROL;
exp[11] = 0x04; /* Restart streaming */
err = stv06xx_write_sensor_bytes(sd, exp, 6);
} else {
exp[0] = HDCS00_CONTROL;
exp[1] = 0x00; /* Stop streaming */
exp[2] = HDCS_ROWEXPL;
exp[3] = rowexp & 0xff;
exp[4] = HDCS_ROWEXPH;
exp[5] = rowexp >> 8;
exp[6] = HDCS00_SROWEXPL;
exp[7] = srowexp & 0xff;
exp[8] = HDCS00_SROWEXPH;
exp[9] = srowexp >> 8;
exp[10] = HDCS_STATUS;
exp[11] = 0x10; /* Clear exposure error flag*/
exp[12] = HDCS00_CONTROL;
exp[13] = 0x04; /* Restart streaming */
err = stv06xx_write_sensor_bytes(sd, exp, 7);
if (err < 0)
return err;
}
PDEBUG(D_CONF, "Writing exposure %d, rowexp %d, srowexp %d",
val, rowexp, srowexp);
return err;
}
static int hdcs_set_gains(struct sd *sd, u8 g)
{
int err;
u8 gains[4];
/* the voltage gain Av = (1 + 19 * val / 127) * (1 + bit7) */
if (g > 127)
g = 0x80 | (g / 2);
gains[0] = g;
gains[1] = g;
gains[2] = g;
gains[3] = g;
err = hdcs_reg_write_seq(sd, HDCS_ERECPGA, gains, 4);
return err;
}
static int hdcs_set_gain(struct gspca_dev *gspca_dev, __s32 val)
{
PDEBUG(D_CONF, "Writing gain %d", val);
return hdcs_set_gains((struct sd *) gspca_dev,
val & 0xff);
}
static int hdcs_set_size(struct sd *sd,
unsigned int width, unsigned int height)
{
struct hdcs *hdcs = sd->sensor_priv;
u8 win[4];
unsigned int x, y;
int err;
/* must be multiple of 4 */
width = (width + 3) & ~0x3;
height = (height + 3) & ~0x3;
if (width > hdcs->array.width)
width = hdcs->array.width;
if (IS_1020(sd)) {
/* the borders are also invalid */
if (height + 2 * hdcs->array.border + HDCS_1020_BOTTOM_Y_SKIP
> hdcs->array.height)
height = hdcs->array.height - 2 * hdcs->array.border -
HDCS_1020_BOTTOM_Y_SKIP;
y = (hdcs->array.height - HDCS_1020_BOTTOM_Y_SKIP - height) / 2
+ hdcs->array.top;
} else {
if (height > hdcs->array.height)
height = hdcs->array.height;
y = hdcs->array.top + (hdcs->array.height - height) / 2;
}
x = hdcs->array.left + (hdcs->array.width - width) / 2;
win[0] = y / 4;
win[1] = x / 4;
win[2] = (y + height) / 4 - 1;
win[3] = (x + width) / 4 - 1;
err = hdcs_reg_write_seq(sd, HDCS_FWROW, win, 4);
if (err < 0)
return err;
/* Update the current width and height */
hdcs->w = width;
hdcs->h = height;
return err;
}
static int hdcs_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct gspca_dev *gspca_dev =
container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
int err = -EINVAL;
switch (ctrl->id) {
case V4L2_CID_GAIN:
err = hdcs_set_gain(gspca_dev, ctrl->val);
break;
case V4L2_CID_EXPOSURE:
err = hdcs_set_exposure(gspca_dev, ctrl->val);
break;
}
return err;
}
static const struct v4l2_ctrl_ops hdcs_ctrl_ops = {
.s_ctrl = hdcs_s_ctrl,
};
static int hdcs_init_controls(struct sd *sd)
{
struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
v4l2_ctrl_handler_init(hdl, 2);
v4l2_ctrl_new_std(hdl, &hdcs_ctrl_ops,
V4L2_CID_EXPOSURE, 0, 0xff, 1, HDCS_DEFAULT_EXPOSURE);
v4l2_ctrl_new_std(hdl, &hdcs_ctrl_ops,
V4L2_CID_GAIN, 0, 0xff, 1, HDCS_DEFAULT_GAIN);
return hdl->error;
}
static int hdcs_probe_1x00(struct sd *sd)
{
struct hdcs *hdcs;
u16 sensor;
int ret;
ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
if (ret < 0 || sensor != 0x08)
return -ENODEV;
pr_info("HDCS-1000/1100 sensor detected\n");
sd->gspca_dev.cam.cam_mode = hdcs1x00_mode;
sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1x00_mode);
hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
if (!hdcs)
return -ENOMEM;
hdcs->array.left = 8;
hdcs->array.top = 8;
hdcs->array.width = HDCS_1X00_DEF_WIDTH;
hdcs->array.height = HDCS_1X00_DEF_HEIGHT;
hdcs->array.border = 4;
hdcs->exp.cto = 4;
hdcs->exp.cpo = 2;
hdcs->exp.rs = 186;
hdcs->exp.er = 100;
/*
* Frame rate on HDCS-1000 with STV600 depends on PSMP:
* 4 = doesn't work at all
* 5 = 7.8 fps,
* 6 = 6.9 fps,
* 8 = 6.3 fps,
* 10 = 5.5 fps,
* 15 = 4.4 fps,
* 31 = 2.8 fps
*
* Frame rate on HDCS-1000 with STV602 depends on PSMP:
* 15 = doesn't work at all
* 18 = doesn't work at all
* 19 = 7.3 fps
* 20 = 7.4 fps
* 21 = 7.4 fps
* 22 = 7.4 fps
* 24 = 6.3 fps
* 30 = 5.4 fps
*/
hdcs->psmp = (sd->bridge == BRIDGE_STV602) ? 20 : 5;
sd->sensor_priv = hdcs;
return 0;
}
static int hdcs_probe_1020(struct sd *sd)
{
struct hdcs *hdcs;
u16 sensor;
int ret;
ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
if (ret < 0 || sensor != 0x10)
return -ENODEV;
pr_info("HDCS-1020 sensor detected\n");
sd->gspca_dev.cam.cam_mode = hdcs1020_mode;
sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1020_mode);
hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
if (!hdcs)
return -ENOMEM;
/*
* From Andrey's test image: looks like HDCS-1020 upper-left
* visible pixel is at 24,8 (y maybe even smaller?) and lower-right
* visible pixel at 375,299 (x maybe even larger?)
*/
hdcs->array.left = 24;
hdcs->array.top = 4;
hdcs->array.width = HDCS_1020_DEF_WIDTH;
hdcs->array.height = 304;
hdcs->array.border = 4;
hdcs->psmp = 6;
hdcs->exp.cto = 3;
hdcs->exp.cpo = 3;
hdcs->exp.rs = 155;
hdcs->exp.er = 96;
sd->sensor_priv = hdcs;
return 0;
}
static int hdcs_start(struct sd *sd)
{
struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
PDEBUG(D_STREAM, "Starting stream");
return hdcs_set_state(sd, HDCS_STATE_RUN);
}
static int hdcs_stop(struct sd *sd)
{
struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
PDEBUG(D_STREAM, "Halting stream");
return hdcs_set_state(sd, HDCS_STATE_SLEEP);
}
static int hdcs_init(struct sd *sd)
{
struct hdcs *hdcs = sd->sensor_priv;
int i, err = 0;
/* Set the STV0602AA in STV0600 emulation mode */
if (sd->bridge == BRIDGE_STV602)
stv06xx_write_bridge(sd, STV_STV0600_EMULATION, 1);
/* Execute the bridge init */
for (i = 0; i < ARRAY_SIZE(stv_bridge_init) && !err; i++) {
err = stv06xx_write_bridge(sd, stv_bridge_init[i][0],
stv_bridge_init[i][1]);
}
if (err < 0)
return err;
/* sensor soft reset */
hdcs_reset(sd);
/* Execute the sensor init */
for (i = 0; i < ARRAY_SIZE(stv_sensor_init) && !err; i++) {
err = stv06xx_write_sensor(sd, stv_sensor_init[i][0],
stv_sensor_init[i][1]);
}
if (err < 0)
return err;
/* Enable continuous frame capture, bit 2: stop when frame complete */
err = stv06xx_write_sensor(sd, HDCS_REG_CONFIG(sd), BIT(3));
if (err < 0)
return err;
/* Set PGA sample duration
(was 0x7E for the STV602, but caused slow framerate with HDCS-1020) */
if (IS_1020(sd))
err = stv06xx_write_sensor(sd, HDCS_TCTRL,
(HDCS_ADC_START_SIG_DUR << 6) | hdcs->psmp);
else
err = stv06xx_write_sensor(sd, HDCS_TCTRL,
(HDCS_ADC_START_SIG_DUR << 5) | hdcs->psmp);
if (err < 0)
return err;
return hdcs_set_size(sd, hdcs->array.width, hdcs->array.height);
}
static int hdcs_dump(struct sd *sd)
{
u16 reg, val;
pr_info("Dumping sensor registers:\n");
for (reg = HDCS_IDENT; reg <= HDCS_ROWEXPH; reg++) {
stv06xx_read_sensor(sd, reg, &val);
pr_info("reg 0x%02x = 0x%02x\n", reg, val);
}
return 0;
}