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/*
* Support for the sensor part which is integrated (I think) into the
* st6422 stv06xx alike bridge, as its integrated there are no i2c writes
* but instead direct bridge writes.
*
* Copyright (c) 2009 Hans de Goede <hdegoede@redhat.com>
*
* Strongly based on qc-usb-messenger, which is:
* Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
* Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
* Copyright (c) 2002, 2003 Tuukka Toivonen
*
* 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.
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include "stv06xx_st6422.h"
static struct v4l2_pix_format st6422_mode[] = {
/* Note we actually get 124 lines of data, of which we skip the 4st
4 as they are garbage */
{
162,
120,
V4L2_PIX_FMT_SGRBG8,
V4L2_FIELD_NONE,
.sizeimage = 162 * 120,
.bytesperline = 162,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 1
},
/* Note we actually get 248 lines of data, of which we skip the 4st
4 as they are garbage, and we tell the app it only gets the
first 240 of the 244 lines it actually gets, so that it ignores
the last 4. */
{
324,
240,
V4L2_PIX_FMT_SGRBG8,
V4L2_FIELD_NONE,
.sizeimage = 324 * 244,
.bytesperline = 324,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 0
},
};
/* V4L2 controls supported by the driver */
static int setbrightness(struct sd *sd, s32 val);
static int setcontrast(struct sd *sd, s32 val);
static int setgain(struct sd *sd, u8 gain);
static int setexposure(struct sd *sd, s16 expo);
static int st6422_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;
int err = -EINVAL;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
err = setbrightness(sd, ctrl->val);
break;
case V4L2_CID_CONTRAST:
err = setcontrast(sd, ctrl->val);
break;
case V4L2_CID_GAIN:
err = setgain(sd, ctrl->val);
break;
case V4L2_CID_EXPOSURE:
err = setexposure(sd, ctrl->val);
break;
}
/* commit settings */
if (err >= 0)
err = stv06xx_write_bridge(sd, 0x143f, 0x01);
sd->gspca_dev.usb_err = err;
return err;
}
static const struct v4l2_ctrl_ops st6422_ctrl_ops = {
.s_ctrl = st6422_s_ctrl,
};
static int st6422_init_controls(struct sd *sd)
{
struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
v4l2_ctrl_handler_init(hdl, 4);
v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
V4L2_CID_BRIGHTNESS, 0, 31, 1, 3);
v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
V4L2_CID_CONTRAST, 0, 15, 1, 11);
v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
V4L2_CID_EXPOSURE, 0, 1023, 1, 256);
v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
V4L2_CID_GAIN, 0, 255, 1, 64);
return hdl->error;
}
static int st6422_probe(struct sd *sd)
{
if (sd->bridge != BRIDGE_ST6422)
return -ENODEV;
pr_info("st6422 sensor detected\n");
sd->gspca_dev.cam.cam_mode = st6422_mode;
sd->gspca_dev.cam.nmodes = ARRAY_SIZE(st6422_mode);
return 0;
}
static int st6422_init(struct sd *sd)
{
int err = 0, i;
const u16 st6422_bridge_init[][2] = {
{ STV_ISO_ENABLE, 0x00 }, /* disable capture */
{ 0x1436, 0x00 },
{ 0x1432, 0x03 }, /* 0x00-0x1F brightness */
{ 0x143a, 0xf9 }, /* 0x00-0x0F contrast */
{ 0x0509, 0x38 }, /* R */
{ 0x050a, 0x38 }, /* G */
{ 0x050b, 0x38 }, /* B */
{ 0x050c, 0x2a },
{ 0x050d, 0x01 },
{ 0x1431, 0x00 }, /* 0x00-0x07 ??? */
{ 0x1433, 0x34 }, /* 160x120, 0x00-0x01 night filter */
{ 0x1438, 0x18 }, /* 640x480 */
/* 18 bayes */
/* 10 compressed? */
{ 0x1439, 0x00 },
/* anti-noise? 0xa2 gives a perfect image */
{ 0x143b, 0x05 },
{ 0x143c, 0x00 }, /* 0x00-0x01 - ??? */
/* shutter time 0x0000-0x03FF */
/* low value give good picures on moving objects (but requires much light) */
/* high value gives good picures in darkness (but tends to be overexposed) */
{ 0x143e, 0x01 },
{ 0x143d, 0x00 },
{ 0x1442, 0xe2 },
/* write: 1x1x xxxx */
/* read: 1x1x xxxx */
/* bit 5 == button pressed and hold if 0 */
/* write 0xe2,0xea */
/* 0x144a */
/* 0x00 init */
/* bit 7 == button has been pressed, but not handled */
/* interrupt */
/* if(urb->iso_frame_desc[i].status == 0x80) { */
/* if(urb->iso_frame_desc[i].status == 0x88) { */
{ 0x1500, 0xd0 },
{ 0x1500, 0xd0 },
{ 0x1500, 0x50 }, /* 0x00 - 0xFF 0x80 == compr ? */
{ 0x1501, 0xaf },
/* high val-> light area gets darker */
/* low val -> light area gets lighter */
{ 0x1502, 0xc2 },
/* high val-> light area gets darker */
/* low val -> light area gets lighter */
{ 0x1503, 0x45 },
/* high val-> light area gets darker */
/* low val -> light area gets lighter */
{ 0x1505, 0x02 },
/* 2 : 324x248 80352 bytes */
/* 7 : 248x162 40176 bytes */
/* c+f: 162*124 20088 bytes */
{ 0x150e, 0x8e },
{ 0x150f, 0x37 },
{ 0x15c0, 0x00 },
{ 0x15c3, 0x08 }, /* 0x04/0x14 ... test pictures ??? */
{ 0x143f, 0x01 }, /* commit settings */
};
for (i = 0; i < ARRAY_SIZE(st6422_bridge_init) && !err; i++) {
err = stv06xx_write_bridge(sd, st6422_bridge_init[i][0],
st6422_bridge_init[i][1]);
}
return err;
}
static int setbrightness(struct sd *sd, s32 val)
{
/* val goes from 0 -> 31 */
return stv06xx_write_bridge(sd, 0x1432, val);
}
static int setcontrast(struct sd *sd, s32 val)
{
/* Val goes from 0 -> 15 */
return stv06xx_write_bridge(sd, 0x143a, val | 0xf0);
}
static int setgain(struct sd *sd, u8 gain)
{
int err;
/* Set red, green, blue, gain */
err = stv06xx_write_bridge(sd, 0x0509, gain);
if (err < 0)
return err;
err = stv06xx_write_bridge(sd, 0x050a, gain);
if (err < 0)
return err;
err = stv06xx_write_bridge(sd, 0x050b, gain);
if (err < 0)
return err;
/* 2 mystery writes */
err = stv06xx_write_bridge(sd, 0x050c, 0x2a);
if (err < 0)
return err;
return stv06xx_write_bridge(sd, 0x050d, 0x01);
}
static int setexposure(struct sd *sd, s16 expo)
{
int err;
err = stv06xx_write_bridge(sd, 0x143d, expo & 0xff);
if (err < 0)
return err;
return stv06xx_write_bridge(sd, 0x143e, expo >> 8);
}
static int st6422_start(struct sd *sd)
{
int err;
struct cam *cam = &sd->gspca_dev.cam;
if (cam->cam_mode[sd->gspca_dev.curr_mode].priv)
err = stv06xx_write_bridge(sd, 0x1505, 0x0f);
else
err = stv06xx_write_bridge(sd, 0x1505, 0x02);
if (err < 0)
return err;
/* commit settings */
err = stv06xx_write_bridge(sd, 0x143f, 0x01);
return (err < 0) ? err : 0;
}
static int st6422_stop(struct sd *sd)
{
struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");
return 0;
}
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