/*
* 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
*
* 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
*/
/*
* The spec file for the PB-0100 suggests the following for best quality
* images after the sensor has been reset :
*
* PB_ADCGAINL = R60 = 0x03 (3 dec) : sets low reference of ADC
to produce good black level
* PB_PREADCTRL = R32 = 0x1400 (5120 dec) : Enables global gain changes
through R53
* PB_ADCMINGAIN = R52 = 0x10 (16 dec) : Sets the minimum gain for
auto-exposure
* PB_ADCGLOBALGAIN = R53 = 0x10 (16 dec) : Sets the global gain
* PB_EXPGAIN = R14 = 0x11 (17 dec) : Sets the auto-exposure value
* PB_UPDATEINT = R23 = 0x02 (2 dec) : Sets the speed on
auto-exposure routine
* PB_CFILLIN = R5 = 0x0E (14 dec) : Sets the frame rate
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include "stv06xx_pb0100.h"
struct pb0100_ctrls {
struct { /* one big happy control cluster... */
struct v4l2_ctrl *autogain;
struct v4l2_ctrl *gain;
struct v4l2_ctrl *exposure;
struct v4l2_ctrl *red;
struct v4l2_ctrl *blue;
struct v4l2_ctrl *natural;
};
struct v4l2_ctrl *target;
};
static struct v4l2_pix_format pb0100_mode[] = {
/* low res / subsample modes disabled as they are only half res horizontal,
halving the vertical resolution does not seem to work */
{
320,
240,
V4L2_PIX_FMT_SGRBG8,
V4L2_FIELD_NONE,
.sizeimage = 320 * 240,
.bytesperline = 320,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = PB0100_CROP_TO_VGA
},
{
352,
288,
V4L2_PIX_FMT_SGRBG8,
V4L2_FIELD_NONE,
.sizeimage = 352 * 288,
.bytesperline = 352,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 0
}
};
static int pb0100_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct gspca_dev *gspca_dev =
container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
struct sd *sd = (struct sd *)gspca_dev;
struct pb0100_ctrls *ctrls = sd->sensor_priv;
int err = -EINVAL;
switch (ctrl->id) {
case V4L2_CID_AUTOGAIN:
err = pb0100_set_autogain(gspca_dev, ctrl->val);
if (err)
break;
if (ctrl->val)
break;
err = pb0100_set_gain(gspca_dev, ctrls->gain->val);
if (err)
break;
err = pb0100_set_exposure(gspca_dev, ctrls->exposure->val);
break;
case V4L2_CTRL_CLASS_USER + 0x1001:
err = pb0100_set_autogain_target(gspca_dev, ctrl->val);
break;
}
return err;
}
static const struct v4l2_ctrl_ops pb0100_ctrl_ops = {
.s_ctrl = pb0100_s_ctrl,
};
static int pb0100_init_controls(struct sd *sd)
{
struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
struct pb0100_ctrls *ctrls;
static const struct v4l2_ctrl_config autogain_target = {
.ops = &pb0100_ctrl_ops,
.id = V4L2_CTRL_CLASS_USER + 0x1000,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Automatic Gain Target",
.max = 255,
.step = 1,
.def = 128,
};
static const struct v4l2_ctrl_config natural_light = {
.ops = &pb0100_ctrl_ops,
.id = V4L2_CTRL_CLASS_USER + 0x1001,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Natural Light Source",
.max = 1,
.step = 1,
.def = 1,
};
ctrls = kzalloc(sizeof(*ctrls), GFP_KERNEL);
if (!ctrls)
return -ENOMEM;
v4l2_ctrl_handler_init(hdl, 6);
ctrls->autogain = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
ctrls->exposure = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
V4L2_CID_EXPOSURE, 0, 511, 1, 12);
ctrls->gain = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
V4L2_CID_GAIN, 0, 255, 1, 128);
ctrls->red = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
V4L2_CID_RED_BALANCE, -255, 255, 1, 0);
ctrls->blue = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
V4L2_CID_BLUE_BALANCE, -255, 255, 1, 0);
ctrls->natural = v4l2_ctrl_new_custom(hdl, &natural_light, NULL);
ctrls->target = v4l2_ctrl_new_custom(hdl, &autogain_target, NULL);
if (hdl->error) {
kfree(ctrls);
return hdl->error;
}
sd->sensor_priv = ctrls;
v4l2_ctrl_auto_cluster(5, &ctrls->autogain, 0, false);
return 0;
}
static int pb0100_probe(struct sd *sd)
{
u16 sensor;
int err;
err = stv06xx_read_sensor(sd, PB_IDENT, &sensor);
if (err < 0)
return -ENODEV;
if ((sensor >> 8) != 0x64)
return -ENODEV;
pr_info("Photobit pb0100 sensor detected\n");
sd->gspca_dev.cam.cam_mode = pb0100_mode;
sd->gspca_dev.cam.nmodes = ARRAY_SIZE(pb0100_mode);
return 0;
}
static int pb0100_start(struct sd *sd)
{
int err, packet_size, max_packet_size;
struct usb_host_interface *alt;
struct usb_interface *intf;
struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
struct cam *cam = &sd->gspca_dev.cam;
u32 mode = cam->cam_mode[sd->gspca_dev.curr_mode].priv;
intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
if (!alt)
return -ENODEV;
packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
/* If we don't have enough bandwidth use a lower framerate */
max_packet_size = sd->sensor->max_packet_size[sd->gspca_dev.curr_mode];
if (packet_size < max_packet_size)
stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(4)|BIT(3)|BIT(1));
else
stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(5)|BIT(3)|BIT(1));
/* Setup sensor window */
if (mode & PB0100_CROP_TO_VGA) {
stv06xx_write_sensor(sd, PB_RSTART, 30);
stv06xx_write_sensor(sd, PB_CSTART, 20);
stv06xx_write_sensor(sd, PB_RWSIZE, 240 - 1);
stv06xx_write_sensor(sd, PB_CWSIZE, 320 - 1);
} else {
stv06xx_write_sensor(sd, PB_RSTART, 8);
stv06xx_write_sensor(sd, PB_CSTART, 4);
stv06xx_write_sensor(sd, PB_RWSIZE, 288 - 1);
stv06xx_write_sensor(sd, PB_CWSIZE, 352 - 1);
}
if (mode & PB0100_SUBSAMPLE) {
stv06xx_write_bridge(sd, STV_Y_CTRL, 0x02); /* Wrong, FIXME */
stv06xx_write_bridge(sd, STV_X_CTRL, 0x06);
stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x10);
} else {
stv06xx_write_bridge(sd, STV_Y_CTRL, 0x01);
stv06xx_write_bridge(sd, STV_X_CTRL, 0x0a);
/* larger -> slower */
stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x20);
}
err = stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)|BIT(3)|BIT(1));
PDEBUG(D_STREAM, "Started stream, status: %d", err);
return (err < 0) ? err : 0;
}
static int pb0100_stop(struct sd *sd)
{
struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
int err;
err = stv06xx_write_sensor(sd, PB_ABORTFRAME, 1);
if (err < 0)
goto out;
/* Set bit 1 to zero */
err = stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)|BIT(3));
PDEBUG(D_STREAM, "Halting stream");
out:
return (err < 0) ? err : 0;
}
/* FIXME: Sort the init commands out and put them into tables,
this is only for getting the camera to work */
/* FIXME: No error handling for now,
add this once the init has been converted to proper tables */
static int pb0100_init(struct sd *sd)
{
stv06xx_write_bridge(sd, STV_REG00, 1);
stv06xx_write_bridge(sd, STV_SCAN_RATE, 0);
/* Reset sensor */
stv06xx_write_sensor(sd, PB_RESET, 1);
stv06xx_write_sensor(sd, PB_RESET, 0);
/* Disable chip */
stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)|BIT(3));
/* Gain stuff...*/
stv06xx_write_sensor(sd, PB_PREADCTRL, BIT(12)|BIT(10)|BIT(6));
stv06xx_write_sensor(sd, PB_ADCGLOBALGAIN, 12);
/* Set up auto-exposure */
/* ADC VREF_HI new setting for a transition
from the Expose1 to the Expose2 setting */
stv06xx_write_sensor(sd, PB_R28, 12);
/* gain max for autoexposure */
stv06xx_write_sensor(sd, PB_ADCMAXGAIN, 180);
/* gain min for autoexposure */
stv06xx_write_sensor(sd, PB_ADCMINGAIN, 12);
/* Maximum frame integration time (programmed into R8)
allowed for auto-exposure routine */
stv06xx_write_sensor(sd, PB_R54, 3);
/* Minimum frame integration time (programmed into R8)
allowed for auto-exposure routine */
stv06xx_write_sensor(sd, PB_R55, 0);
stv06xx_write_sensor(sd, PB_UPDATEINT, 1);
/* R15 Expose0 (maximum that auto-exposure may use) */
stv06xx_write_sensor(sd, PB_R15, 800);
/* R17 Expose2 (minimum that auto-exposure may use) */
stv06xx_write_sensor(sd, PB_R17, 10);
stv06xx_write_sensor(sd, PB_EXPGAIN, 0);
/* 0x14 */
stv06xx_write_sensor(sd, PB_VOFFSET, 0);
/* 0x0D */
stv06xx_write_sensor(sd, PB_ADCGAINH, 11);
/* Set black level (important!) */
stv06xx_write_sensor(sd, PB_ADCGAINL, 0);
/* ??? */
stv06xx_write_bridge(sd, STV_REG00, 0x11);
stv06xx_write_bridge(sd, STV_REG03, 0x45);
stv06xx_write_bridge(sd, STV_REG04, 0x07);
/* Scan/timing for the sensor */
stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(4)|BIT(3)|BIT(1));
stv06xx_write_sensor(sd, PB_CFILLIN, 14);
stv06xx_write_sensor(sd, PB_VBL, 0);
stv06xx_write_sensor(sd, PB_FINTTIME, 0);
stv06xx_write_sensor(sd, PB_RINTTIME, 123);
stv06xx_write_bridge(sd, STV_REG01, 0xc2);
stv06xx_write_bridge(sd, STV_REG02, 0xb0);
return 0;
}
static int pb0100_dump(struct sd *sd)
{
return 0;
}
static int pb0100_set_gain(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
struct sd *sd = (struct sd *) gspca_dev;
struct pb0100_ctrls *ctrls = sd->sensor_priv;
err = stv06xx_write_sensor(sd, PB_G1GAIN, val);
if (!err)
err = stv06xx_write_sensor(sd, PB_G2GAIN, val);
PDEBUG(D_CONF, "Set green gain to %d, status: %d", val, err);
if (!err)
err = pb0100_set_red_balance(gspca_dev, ctrls->red->val);
if (!err)
err = pb0100_set_blue_balance(gspca_dev, ctrls->blue->val);
return err;
}
static int pb0100_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
struct sd *sd = (struct sd *) gspca_dev;
struct pb0100_ctrls *ctrls = sd->sensor_priv;
val += ctrls->gain->val;
if (val < 0)
val = 0;
else if (val > 255)
val = 255;
err = stv06xx_write_sensor(sd, PB_RGAIN, val);
PDEBUG(D_CONF, "Set red gain to %d, status: %d", val, err);
return err;
}
static int pb0100_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
struct sd *sd = (struct sd *) gspca_dev;
struct pb0100_ctrls *ctrls = sd->sensor_priv;
val += ctrls->gain->val;
if (val < 0)
val = 0;
else if (val > 255)
val = 255;
err = stv06xx_write_sensor(sd, PB_BGAIN, val);
PDEBUG(D_CONF, "Set blue gain to %d, status: %d", val, err);
return err;
}
static int pb0100_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
int err;
err = stv06xx_write_sensor(sd, PB_RINTTIME, val);
PDEBUG(D_CONF, "Set exposure to %d, status: %d", val, err);
return err;
}
static int pb0100_set_autogain(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
struct sd *sd = (struct sd *) gspca_dev;
struct pb0100_ctrls *ctrls = sd->sensor_priv;
if (val) {
if (ctrls->natural->val)
val = BIT(6)|BIT(4)|BIT(0);
else
val = BIT(4)|BIT(0);
} else
val = 0;
err = stv06xx_write_sensor(sd, PB_EXPGAIN, val);
PDEBUG(D_CONF, "Set autogain to %d (natural: %d), status: %d",
val, ctrls->natural->val, err);
return err;
}
static int pb0100_set_autogain_target(struct gspca_dev *gspca_dev, __s32 val)
{
int err, totalpixels, brightpixels, darkpixels;
struct sd *sd = (struct sd *) gspca_dev;
/* Number of pixels counted by the sensor when subsampling the pixels.
* Slightly larger than the real value to avoid oscillation */
totalpixels = gspca_dev->pixfmt.width * gspca_dev->pixfmt.height;
totalpixels = totalpixels/(8*8) + totalpixels/(64*64);
brightpixels = (totalpixels * val) >> 8;
darkpixels = totalpixels - brightpixels;
err = stv06xx_write_sensor(sd, PB_R21, brightpixels);
if (!err)
err = stv06xx_write_sensor(sd, PB_R22, darkpixels);
PDEBUG(D_CONF, "Set autogain target to %d, status: %d", val, err);
return err;
}