linux/drivers/media/usb/gspca/stv06xx/stv06xx_st6422.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Support for the sensor part which is integrated (I think) into the
   4 * st6422 stv06xx alike bridge, as its integrated there are no i2c writes
   5 * but instead direct bridge writes.
   6 *
   7 * Copyright (c) 2009 Hans de Goede <hdegoede@redhat.com>
   8 *
   9 * Strongly based on qc-usb-messenger, which is:
  10 * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
  11 *                    Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
  12 * Copyright (c) 2002, 2003 Tuukka Toivonen
  13 */
  14
  15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  16
  17#include "stv06xx_st6422.h"
  18
  19static struct v4l2_pix_format st6422_mode[] = {
  20        /* Note we actually get 124 lines of data, of which we skip the 4st
  21           4 as they are garbage */
  22        {
  23                162,
  24                120,
  25                V4L2_PIX_FMT_SGRBG8,
  26                V4L2_FIELD_NONE,
  27                .sizeimage = 162 * 120,
  28                .bytesperline = 162,
  29                .colorspace = V4L2_COLORSPACE_SRGB,
  30                .priv = 1
  31        },
  32        /* Note we actually get 248 lines of data, of which we skip the 4st
  33           4 as they are garbage, and we tell the app it only gets the
  34           first 240 of the 244 lines it actually gets, so that it ignores
  35           the last 4. */
  36        {
  37                324,
  38                240,
  39                V4L2_PIX_FMT_SGRBG8,
  40                V4L2_FIELD_NONE,
  41                .sizeimage = 324 * 244,
  42                .bytesperline = 324,
  43                .colorspace = V4L2_COLORSPACE_SRGB,
  44                .priv = 0
  45        },
  46};
  47
  48/* V4L2 controls supported by the driver */
  49static int setbrightness(struct sd *sd, s32 val);
  50static int setcontrast(struct sd *sd, s32 val);
  51static int setgain(struct sd *sd, u8 gain);
  52static int setexposure(struct sd *sd, s16 expo);
  53
  54static int st6422_s_ctrl(struct v4l2_ctrl *ctrl)
  55{
  56        struct gspca_dev *gspca_dev =
  57                container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
  58        struct sd *sd = (struct sd *)gspca_dev;
  59        int err = -EINVAL;
  60
  61        switch (ctrl->id) {
  62        case V4L2_CID_BRIGHTNESS:
  63                err = setbrightness(sd, ctrl->val);
  64                break;
  65        case V4L2_CID_CONTRAST:
  66                err = setcontrast(sd, ctrl->val);
  67                break;
  68        case V4L2_CID_GAIN:
  69                err = setgain(sd, ctrl->val);
  70                break;
  71        case V4L2_CID_EXPOSURE:
  72                err = setexposure(sd, ctrl->val);
  73                break;
  74        }
  75
  76        /* commit settings */
  77        if (err >= 0)
  78                err = stv06xx_write_bridge(sd, 0x143f, 0x01);
  79        sd->gspca_dev.usb_err = err;
  80        return err;
  81}
  82
  83static const struct v4l2_ctrl_ops st6422_ctrl_ops = {
  84        .s_ctrl = st6422_s_ctrl,
  85};
  86
  87static int st6422_init_controls(struct sd *sd)
  88{
  89        struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
  90
  91        v4l2_ctrl_handler_init(hdl, 4);
  92        v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
  93                        V4L2_CID_BRIGHTNESS, 0, 31, 1, 3);
  94        v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
  95                        V4L2_CID_CONTRAST, 0, 15, 1, 11);
  96        v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
  97                        V4L2_CID_EXPOSURE, 0, 1023, 1, 256);
  98        v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
  99                        V4L2_CID_GAIN, 0, 255, 1, 64);
 100
 101        return hdl->error;
 102}
 103
 104static int st6422_probe(struct sd *sd)
 105{
 106        if (sd->bridge != BRIDGE_ST6422)
 107                return -ENODEV;
 108
 109        pr_info("st6422 sensor detected\n");
 110
 111        sd->gspca_dev.cam.cam_mode = st6422_mode;
 112        sd->gspca_dev.cam.nmodes = ARRAY_SIZE(st6422_mode);
 113        return 0;
 114}
 115
 116static int st6422_init(struct sd *sd)
 117{
 118        int err = 0, i;
 119
 120        static const u16 st6422_bridge_init[][2] = {
 121                { STV_ISO_ENABLE, 0x00 }, /* disable capture */
 122                { 0x1436, 0x00 },
 123                { 0x1432, 0x03 },       /* 0x00-0x1F brightness */
 124                { 0x143a, 0xf9 },       /* 0x00-0x0F contrast */
 125                { 0x0509, 0x38 },       /* R */
 126                { 0x050a, 0x38 },       /* G */
 127                { 0x050b, 0x38 },       /* B */
 128                { 0x050c, 0x2a },
 129                { 0x050d, 0x01 },
 130
 131
 132                { 0x1431, 0x00 },       /* 0x00-0x07 ??? */
 133                { 0x1433, 0x34 },       /* 160x120, 0x00-0x01 night filter */
 134                { 0x1438, 0x18 },       /* 640x480 */
 135/* 18 bayes */
 136/* 10 compressed? */
 137
 138                { 0x1439, 0x00 },
 139/* anti-noise?  0xa2 gives a perfect image */
 140
 141                { 0x143b, 0x05 },
 142                { 0x143c, 0x00 },       /* 0x00-0x01 - ??? */
 143
 144
 145/* shutter time 0x0000-0x03FF */
 146/* low value  give good picures on moving objects (but requires much light) */
 147/* high value gives good picures in darkness (but tends to be overexposed) */
 148                { 0x143e, 0x01 },
 149                { 0x143d, 0x00 },
 150
 151                { 0x1442, 0xe2 },
 152/* write: 1x1x xxxx */
 153/* read:  1x1x xxxx */
 154/*        bit 5 == button pressed and hold if 0 */
 155/* write 0xe2,0xea */
 156
 157/* 0x144a */
 158/* 0x00 init */
 159/* bit 7 == button has been pressed, but not handled */
 160
 161/* interrupt */
 162/* if(urb->iso_frame_desc[i].status == 0x80) { */
 163/* if(urb->iso_frame_desc[i].status == 0x88) { */
 164
 165                { 0x1500, 0xd0 },
 166                { 0x1500, 0xd0 },
 167                { 0x1500, 0x50 },       /* 0x00 - 0xFF  0x80 == compr ? */
 168
 169                { 0x1501, 0xaf },
 170/* high val-> light area gets darker */
 171/* low val -> light area gets lighter */
 172                { 0x1502, 0xc2 },
 173/* high val-> light area gets darker */
 174/* low val -> light area gets lighter */
 175                { 0x1503, 0x45 },
 176/* high val-> light area gets darker */
 177/* low val -> light area gets lighter */
 178                { 0x1505, 0x02 },
 179/* 2  : 324x248  80352 bytes */
 180/* 7  : 248x162  40176 bytes */
 181/* c+f: 162*124  20088 bytes */
 182
 183                { 0x150e, 0x8e },
 184                { 0x150f, 0x37 },
 185                { 0x15c0, 0x00 },
 186                { 0x15c3, 0x08 },       /* 0x04/0x14 ... test pictures ??? */
 187
 188
 189                { 0x143f, 0x01 },       /* commit settings */
 190
 191        };
 192
 193        for (i = 0; i < ARRAY_SIZE(st6422_bridge_init) && !err; i++) {
 194                err = stv06xx_write_bridge(sd, st6422_bridge_init[i][0],
 195                                               st6422_bridge_init[i][1]);
 196        }
 197
 198        return err;
 199}
 200
 201static int setbrightness(struct sd *sd, s32 val)
 202{
 203        /* val goes from 0 -> 31 */
 204        return stv06xx_write_bridge(sd, 0x1432, val);
 205}
 206
 207static int setcontrast(struct sd *sd, s32 val)
 208{
 209        /* Val goes from 0 -> 15 */
 210        return stv06xx_write_bridge(sd, 0x143a, val | 0xf0);
 211}
 212
 213static int setgain(struct sd *sd, u8 gain)
 214{
 215        int err;
 216
 217        /* Set red, green, blue, gain */
 218        err = stv06xx_write_bridge(sd, 0x0509, gain);
 219        if (err < 0)
 220                return err;
 221
 222        err = stv06xx_write_bridge(sd, 0x050a, gain);
 223        if (err < 0)
 224                return err;
 225
 226        err = stv06xx_write_bridge(sd, 0x050b, gain);
 227        if (err < 0)
 228                return err;
 229
 230        /* 2 mystery writes */
 231        err = stv06xx_write_bridge(sd, 0x050c, 0x2a);
 232        if (err < 0)
 233                return err;
 234
 235        return stv06xx_write_bridge(sd, 0x050d, 0x01);
 236}
 237
 238static int setexposure(struct sd *sd, s16 expo)
 239{
 240        int err;
 241
 242        err = stv06xx_write_bridge(sd, 0x143d, expo & 0xff);
 243        if (err < 0)
 244                return err;
 245
 246        return stv06xx_write_bridge(sd, 0x143e, expo >> 8);
 247}
 248
 249static int st6422_start(struct sd *sd)
 250{
 251        int err;
 252        struct cam *cam = &sd->gspca_dev.cam;
 253
 254        if (cam->cam_mode[sd->gspca_dev.curr_mode].priv)
 255                err = stv06xx_write_bridge(sd, 0x1505, 0x0f);
 256        else
 257                err = stv06xx_write_bridge(sd, 0x1505, 0x02);
 258        if (err < 0)
 259                return err;
 260
 261        /* commit settings */
 262        err = stv06xx_write_bridge(sd, 0x143f, 0x01);
 263        return (err < 0) ? err : 0;
 264}
 265
 266static int st6422_stop(struct sd *sd)
 267{
 268        struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 269
 270        gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");
 271
 272        return 0;
 273}
 274