drivers/media/usb/gspca/stv06xx/stv06xx_st6422.c

   1 /*
   2  * Support for the sensor part which is integrated (I think) into the
   3  * st6422 stv06xx alike bridge, as its integrated there are no i2c writes
   4  * but instead direct bridge writes.
   5  *
   6  * Copyright (c) 2009 Hans de Goede <hdegoede@redhat.com>
   7  *
   8  * Strongly based on qc-usb-messenger, which is:
   9  * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
  10  *                    Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
  11  * Copyright (c) 2002, 2003 Tuukka Toivonen
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  26  *
  27  */
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include "stv06xx_st6422.h"
  32
  33 static struct v4l2_pix_format st6422_mode[] = {
  34         /* Note we actually get 124 lines of data, of which we skip the 4st
  35            4 as they are garbage */
  36         {
  37                 162,
  38                 120,
  39                 V4L2_PIX_FMT_SGRBG8,
  40                 V4L2_FIELD_NONE,
  41                 .sizeimage = 162 * 120,
  42                 .bytesperline = 162,
  43                 .colorspace = V4L2_COLORSPACE_SRGB,
  44                 .priv = 1
  45         },
  46         /* Note we actually get 248 lines of data, of which we skip the 4st
  47            4 as they are garbage, and we tell the app it only gets the
  48            first 240 of the 244 lines it actually gets, so that it ignores
  49            the last 4. */
  50         {
  51                 324,
  52                 240,
  53                 V4L2_PIX_FMT_SGRBG8,
  54                 V4L2_FIELD_NONE,
  55                 .sizeimage = 324 * 244,
  56                 .bytesperline = 324,
  57                 .colorspace = V4L2_COLORSPACE_SRGB,
  58                 .priv = 0
  59         },
  60 };
  61
  62 /* V4L2 controls supported by the driver */
  63 static int setbrightness(struct sd *sd, s32 val);
  64 static int setcontrast(struct sd *sd, s32 val);
  65 static int setgain(struct sd *sd, u8 gain);
  66 static int setexposure(struct sd *sd, s16 expo);
  67
  68 static int st6422_s_ctrl(struct v4l2_ctrl *ctrl)
  69 {
  70         struct gspca_dev *gspca_dev =
  71                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
  72         struct sd *sd = (struct sd *)gspca_dev;
  73         int err = -EINVAL;
  74
  75         switch (ctrl->id) {
  76         case V4L2_CID_BRIGHTNESS:
  77                 err = setbrightness(sd, ctrl->val);
  78                 break;
  79         case V4L2_CID_CONTRAST:
  80                 err = setcontrast(sd, ctrl->val);
  81                 break;
  82         case V4L2_CID_GAIN:
  83                 err = setgain(sd, ctrl->val);
  84                 break;
  85         case V4L2_CID_EXPOSURE:
  86                 err = setexposure(sd, ctrl->val);
  87                 break;
  88         }
  89
  90         /* commit settings */
  91         if (err >= 0)
  92                 err = stv06xx_write_bridge(sd, 0x143f, 0x01);
  93         sd->gspca_dev.usb_err = err;
  94         return err;
  95 }
  96
  97 static const struct v4l2_ctrl_ops st6422_ctrl_ops = {
  98         .s_ctrl = st6422_s_ctrl,
  99 };
 100
 101 static int st6422_init_controls(struct sd *sd)
 102 {
 103         struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
 104
 105         v4l2_ctrl_handler_init(hdl, 4);
 106         v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
 107                         V4L2_CID_BRIGHTNESS, 0, 31, 1, 3);
 108         v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
 109                         V4L2_CID_CONTRAST, 0, 15, 1, 11);
 110         v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
 111                         V4L2_CID_EXPOSURE, 0, 1023, 1, 256);
 112         v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
 113                         V4L2_CID_GAIN, 0, 255, 1, 64);
 114
 115         return hdl->error;
 116 }
 117
 118 static int st6422_probe(struct sd *sd)
 119 {
 120         if (sd->bridge != BRIDGE_ST6422)
 121                 return -ENODEV;
 122
 123         pr_info("st6422 sensor detected\n");
 124
 125         sd->gspca_dev.cam.cam_mode = st6422_mode;
 126         sd->gspca_dev.cam.nmodes = ARRAY_SIZE(st6422_mode);
 127         return 0;
 128 }
 129
 130 static int st6422_init(struct sd *sd)
 131 {
 132         int err = 0, i;
 133
 134         const u16 st6422_bridge_init[][2] = {
 135                 { STV_ISO_ENABLE, 0x00 }, /* disable capture */
 136                 { 0x1436, 0x00 },
 137                 { 0x1432, 0x03 },       /* 0x00-0x1F brightness */
 138                 { 0x143a, 0xf9 },       /* 0x00-0x0F contrast */
 139                 { 0x0509, 0x38 },       /* R */
 140                 { 0x050a, 0x38 },       /* G */
 141                 { 0x050b, 0x38 },       /* B */
 142                 { 0x050c, 0x2a },
 143                 { 0x050d, 0x01 },
 144
 145
 146                 { 0x1431, 0x00 },       /* 0x00-0x07 ??? */
 147                 { 0x1433, 0x34 },       /* 160x120, 0x00-0x01 night filter */
 148                 { 0x1438, 0x18 },       /* 640x480 */
 149 /* 18 bayes */
 150 /* 10 compressed? */
 151
 152                 { 0x1439, 0x00 },
 153 /* anti-noise?  0xa2 gives a perfect image */
 154
 155                 { 0x143b, 0x05 },
 156                 { 0x143c, 0x00 },       /* 0x00-0x01 - ??? */
 157
 158
 159 /* shutter time 0x0000-0x03FF */
 160 /* low value  give good picures on moving objects (but requires much light) */
 161 /* high value gives good picures in darkness (but tends to be overexposed) */
 162                 { 0x143e, 0x01 },
 163                 { 0x143d, 0x00 },
 164
 165                 { 0x1442, 0xe2 },
 166 /* write: 1x1x xxxx */
 167 /* read:  1x1x xxxx */
 168 /*        bit 5 == button pressed and hold if 0 */
 169 /* write 0xe2,0xea */
 170
 171 /* 0x144a */
 172 /* 0x00 init */
 173 /* bit 7 == button has been pressed, but not handled */
 174
 175 /* interrupt */
 176 /* if(urb->iso_frame_desc[i].status == 0x80) { */
 177 /* if(urb->iso_frame_desc[i].status == 0x88) { */
 178
 179                 { 0x1500, 0xd0 },
 180                 { 0x1500, 0xd0 },
 181                 { 0x1500, 0x50 },       /* 0x00 - 0xFF  0x80 == compr ? */
 182
 183                 { 0x1501, 0xaf },
 184 /* high val-> light area gets darker */
 185 /* low val -> light area gets lighter */
 186                 { 0x1502, 0xc2 },
 187 /* high val-> light area gets darker */
 188 /* low val -> light area gets lighter */
 189                 { 0x1503, 0x45 },
 190 /* high val-> light area gets darker */
 191 /* low val -> light area gets lighter */
 192                 { 0x1505, 0x02 },
 193 /* 2  : 324x248  80352 bytes */
 194 /* 7  : 248x162  40176 bytes */
 195 /* c+f: 162*124  20088 bytes */
 196
 197                 { 0x150e, 0x8e },
 198                 { 0x150f, 0x37 },
 199                 { 0x15c0, 0x00 },
 200                 { 0x15c3, 0x08 },       /* 0x04/0x14 ... test pictures ??? */
 201
 202
 203                 { 0x143f, 0x01 },       /* commit settings */
 204
 205         };
 206
 207         for (i = 0; i < ARRAY_SIZE(st6422_bridge_init) && !err; i++) {
 208                 err = stv06xx_write_bridge(sd, st6422_bridge_init[i][0],
 209                                                st6422_bridge_init[i][1]);
 210         }
 211
 212         return err;
 213 }
 214
 215 static int setbrightness(struct sd *sd, s32 val)
 216 {
 217         /* val goes from 0 -> 31 */
 218         return stv06xx_write_bridge(sd, 0x1432, val);
 219 }
 220
 221 static int setcontrast(struct sd *sd, s32 val)
 222 {
 223         /* Val goes from 0 -> 15 */
 224         return stv06xx_write_bridge(sd, 0x143a, val | 0xf0);
 225 }
 226
 227 static int setgain(struct sd *sd, u8 gain)
 228 {
 229         int err;
 230
 231         /* Set red, green, blue, gain */
 232         err = stv06xx_write_bridge(sd, 0x0509, gain);
 233         if (err < 0)
 234                 return err;
 235
 236         err = stv06xx_write_bridge(sd, 0x050a, gain);
 237         if (err < 0)
 238                 return err;
 239
 240         err = stv06xx_write_bridge(sd, 0x050b, gain);
 241         if (err < 0)
 242                 return err;
 243
 244         /* 2 mystery writes */
 245         err = stv06xx_write_bridge(sd, 0x050c, 0x2a);
 246         if (err < 0)
 247                 return err;
 248
 249         return stv06xx_write_bridge(sd, 0x050d, 0x01);
 250 }
 251
 252 static int setexposure(struct sd *sd, s16 expo)
 253 {
 254         int err;
 255
 256         err = stv06xx_write_bridge(sd, 0x143d, expo & 0xff);
 257         if (err < 0)
 258                 return err;
 259
 260         return stv06xx_write_bridge(sd, 0x143e, expo >> 8);
 261 }
 262
 263 static int st6422_start(struct sd *sd)
 264 {
 265         int err;
 266         struct cam *cam = &sd->gspca_dev.cam;
 267
 268         if (cam->cam_mode[sd->gspca_dev.curr_mode].priv)
 269                 err = stv06xx_write_bridge(sd, 0x1505, 0x0f);
 270         else
 271                 err = stv06xx_write_bridge(sd, 0x1505, 0x02);
 272         if (err < 0)
 273                 return err;
 274
 275         /* commit settings */
 276         err = stv06xx_write_bridge(sd, 0x143f, 0x01);
 277         return (err < 0) ? err : 0;
 278 }
 279
 280 static int st6422_stop(struct sd *sd)
 281 {
 282         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 283
 284         PDEBUG(D_STREAM, "Halting stream");
 285
 286         return 0;
 287 }