// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Support for the sensor part which is integrated (I think) into the
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* st6422 stv06xx alike bridge, as its integrated there are no i2c writes
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* but instead direct bridge writes.
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*
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* Copyright (c) 2009 Hans de Goede <hdegoede@redhat.com>
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*
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* Strongly based on qc-usb-messenger, which is:
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* Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
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* Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
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* Copyright (c) 2002, 2003 Tuukka Toivonen
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include "stv06xx_st6422.h"
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static struct v4l2_pix_format st6422_mode[] = {
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/* Note we actually get 124 lines of data, of which we skip the 4st
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4 as they are garbage */
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{
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162,
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120,
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V4L2_PIX_FMT_SGRBG8,
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V4L2_FIELD_NONE,
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.sizeimage = 162 * 120,
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.bytesperline = 162,
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.colorspace = V4L2_COLORSPACE_SRGB,
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.priv = 1
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},
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/* Note we actually get 248 lines of data, of which we skip the 4st
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4 as they are garbage, and we tell the app it only gets the
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first 240 of the 244 lines it actually gets, so that it ignores
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the last 4. */
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{
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324,
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240,
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V4L2_PIX_FMT_SGRBG8,
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V4L2_FIELD_NONE,
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.sizeimage = 324 * 244,
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.bytesperline = 324,
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.colorspace = V4L2_COLORSPACE_SRGB,
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.priv = 0
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},
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};
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/* V4L2 controls supported by the driver */
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static int setbrightness(struct sd *sd, s32 val);
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static int setcontrast(struct sd *sd, s32 val);
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static int setgain(struct sd *sd, u8 gain);
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static int setexposure(struct sd *sd, s16 expo);
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static int st6422_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct gspca_dev *gspca_dev =
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container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
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struct sd *sd = (struct sd *)gspca_dev;
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int err = -EINVAL;
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switch (ctrl->id) {
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case V4L2_CID_BRIGHTNESS:
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err = setbrightness(sd, ctrl->val);
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break;
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case V4L2_CID_CONTRAST:
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err = setcontrast(sd, ctrl->val);
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break;
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case V4L2_CID_GAIN:
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err = setgain(sd, ctrl->val);
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break;
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case V4L2_CID_EXPOSURE:
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err = setexposure(sd, ctrl->val);
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break;
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}
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/* commit settings */
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if (err >= 0)
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err = stv06xx_write_bridge(sd, 0x143f, 0x01);
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sd->gspca_dev.usb_err = err;
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return err;
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}
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static const struct v4l2_ctrl_ops st6422_ctrl_ops = {
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.s_ctrl = st6422_s_ctrl,
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};
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static int st6422_init_controls(struct sd *sd)
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{
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struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
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v4l2_ctrl_handler_init(hdl, 4);
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v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
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V4L2_CID_BRIGHTNESS, 0, 31, 1, 3);
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v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
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V4L2_CID_CONTRAST, 0, 15, 1, 11);
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v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
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V4L2_CID_EXPOSURE, 0, 1023, 1, 256);
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v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
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V4L2_CID_GAIN, 0, 255, 1, 64);
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return hdl->error;
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}
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static int st6422_probe(struct sd *sd)
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{
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if (sd->bridge != BRIDGE_ST6422)
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return -ENODEV;
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pr_info("st6422 sensor detected\n");
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sd->gspca_dev.cam.cam_mode = st6422_mode;
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sd->gspca_dev.cam.nmodes = ARRAY_SIZE(st6422_mode);
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return 0;
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}
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static int st6422_init(struct sd *sd)
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{
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int err = 0, i;
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static const u16 st6422_bridge_init[][2] = {
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{ STV_ISO_ENABLE, 0x00 }, /* disable capture */
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{ 0x1436, 0x00 },
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{ 0x1432, 0x03 }, /* 0x00-0x1F brightness */
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{ 0x143a, 0xf9 }, /* 0x00-0x0F contrast */
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{ 0x0509, 0x38 }, /* R */
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{ 0x050a, 0x38 }, /* G */
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{ 0x050b, 0x38 }, /* B */
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{ 0x050c, 0x2a },
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{ 0x050d, 0x01 },
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{ 0x1431, 0x00 }, /* 0x00-0x07 ??? */
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{ 0x1433, 0x34 }, /* 160x120, 0x00-0x01 night filter */
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{ 0x1438, 0x18 }, /* 640x480 */
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/* 18 bayes */
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/* 10 compressed? */
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{ 0x1439, 0x00 },
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/* anti-noise? 0xa2 gives a perfect image */
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{ 0x143b, 0x05 },
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{ 0x143c, 0x00 }, /* 0x00-0x01 - ??? */
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/* shutter time 0x0000-0x03FF */
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/* low value give good picures on moving objects (but requires much light) */
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/* high value gives good picures in darkness (but tends to be overexposed) */
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{ 0x143e, 0x01 },
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{ 0x143d, 0x00 },
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{ 0x1442, 0xe2 },
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/* write: 1x1x xxxx */
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/* read: 1x1x xxxx */
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/* bit 5 == button pressed and hold if 0 */
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/* write 0xe2,0xea */
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/* 0x144a */
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/* 0x00 init */
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/* bit 7 == button has been pressed, but not handled */
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/* interrupt */
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/* if(urb->iso_frame_desc[i].status == 0x80) { */
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/* if(urb->iso_frame_desc[i].status == 0x88) { */
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{ 0x1500, 0xd0 },
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{ 0x1500, 0xd0 },
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{ 0x1500, 0x50 }, /* 0x00 - 0xFF 0x80 == compr ? */
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{ 0x1501, 0xaf },
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/* high val-> light area gets darker */
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/* low val -> light area gets lighter */
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{ 0x1502, 0xc2 },
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/* high val-> light area gets darker */
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/* low val -> light area gets lighter */
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{ 0x1503, 0x45 },
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/* high val-> light area gets darker */
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/* low val -> light area gets lighter */
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{ 0x1505, 0x02 },
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/* 2 : 324x248 80352 bytes */
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/* 7 : 248x162 40176 bytes */
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/* c+f: 162*124 20088 bytes */
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{ 0x150e, 0x8e },
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{ 0x150f, 0x37 },
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{ 0x15c0, 0x00 },
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{ 0x15c3, 0x08 }, /* 0x04/0x14 ... test pictures ??? */
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{ 0x143f, 0x01 }, /* commit settings */
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};
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for (i = 0; i < ARRAY_SIZE(st6422_bridge_init) && !err; i++) {
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err = stv06xx_write_bridge(sd, st6422_bridge_init[i][0],
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st6422_bridge_init[i][1]);
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}
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return err;
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}
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static int setbrightness(struct sd *sd, s32 val)
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{
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/* val goes from 0 -> 31 */
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return stv06xx_write_bridge(sd, 0x1432, val);
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}
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static int setcontrast(struct sd *sd, s32 val)
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{
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/* Val goes from 0 -> 15 */
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return stv06xx_write_bridge(sd, 0x143a, val | 0xf0);
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}
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static int setgain(struct sd *sd, u8 gain)
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{
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int err;
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/* Set red, green, blue, gain */
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err = stv06xx_write_bridge(sd, 0x0509, gain);
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if (err < 0)
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return err;
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err = stv06xx_write_bridge(sd, 0x050a, gain);
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if (err < 0)
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return err;
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err = stv06xx_write_bridge(sd, 0x050b, gain);
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if (err < 0)
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return err;
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/* 2 mystery writes */
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err = stv06xx_write_bridge(sd, 0x050c, 0x2a);
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if (err < 0)
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return err;
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return stv06xx_write_bridge(sd, 0x050d, 0x01);
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}
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static int setexposure(struct sd *sd, s16 expo)
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{
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int err;
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err = stv06xx_write_bridge(sd, 0x143d, expo & 0xff);
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if (err < 0)
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return err;
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return stv06xx_write_bridge(sd, 0x143e, expo >> 8);
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}
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static int st6422_start(struct sd *sd)
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{
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int err;
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struct cam *cam = &sd->gspca_dev.cam;
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if (cam->cam_mode[sd->gspca_dev.curr_mode].priv)
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err = stv06xx_write_bridge(sd, 0x1505, 0x0f);
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else
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err = stv06xx_write_bridge(sd, 0x1505, 0x02);
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if (err < 0)
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return err;
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/* commit settings */
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err = stv06xx_write_bridge(sd, 0x143f, 0x01);
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return (err < 0) ? err : 0;
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}
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static int st6422_stop(struct sd *sd)
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{
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struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
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gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");
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return 0;
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}
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