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  */
  24
  25 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  26
  27 #include "stv06xx_st6422.h"
  28
  29 static struct v4l2_pix_format st6422_mode[] = {
  30         /* Note we actually get 124 lines of data, of which we skip the 4st
  31            4 as they are garbage */
  32         {
  33                 162,
  34                 120,
  35                 V4L2_PIX_FMT_SGRBG8,
  36                 V4L2_FIELD_NONE,
  37                 .sizeimage = 162 * 120,
  38                 .bytesperline = 162,
  39                 .colorspace = V4L2_COLORSPACE_SRGB,
  40                 .priv = 1
  41         },
  42         /* Note we actually get 248 lines of data, of which we skip the 4st
  43            4 as they are garbage, and we tell the app it only gets the
  44            first 240 of the 244 lines it actually gets, so that it ignores
  45            the last 4. */
  46         {
  47                 324,
  48                 240,
  49                 V4L2_PIX_FMT_SGRBG8,
  50                 V4L2_FIELD_NONE,
  51                 .sizeimage = 324 * 244,
  52                 .bytesperline = 324,
  53                 .colorspace = V4L2_COLORSPACE_SRGB,
  54                 .priv = 0
  55         },
  56 };
  57
  58 /* V4L2 controls supported by the driver */
  59 static int setbrightness(struct sd *sd, s32 val);
  60 static int setcontrast(struct sd *sd, s32 val);
  61 static int setgain(struct sd *sd, u8 gain);
  62 static int setexposure(struct sd *sd, s16 expo);
  63
  64 static int st6422_s_ctrl(struct v4l2_ctrl *ctrl)
  65 {
  66         struct gspca_dev *gspca_dev =
  67                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
  68         struct sd *sd = (struct sd *)gspca_dev;
  69         int err = -EINVAL;
  70
  71         switch (ctrl->id) {
  72         case V4L2_CID_BRIGHTNESS:
  73                 err = setbrightness(sd, ctrl->val);
  74                 break;
  75         case V4L2_CID_CONTRAST:
  76                 err = setcontrast(sd, ctrl->val);
  77                 break;
  78         case V4L2_CID_GAIN:
  79                 err = setgain(sd, ctrl->val);
  80                 break;
  81         case V4L2_CID_EXPOSURE:
  82                 err = setexposure(sd, ctrl->val);
  83                 break;
  84         }
  85
  86         /* commit settings */
  87         if (err >= 0)
  88                 err = stv06xx_write_bridge(sd, 0x143f, 0x01);
  89         sd->gspca_dev.usb_err = err;
  90         return err;
  91 }
  92
  93 static const struct v4l2_ctrl_ops st6422_ctrl_ops = {
  94         .s_ctrl = st6422_s_ctrl,
  95 };
  96
  97 static int st6422_init_controls(struct sd *sd)
  98 {
  99         struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
 100
 101         v4l2_ctrl_handler_init(hdl, 4);
 102         v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
 103                         V4L2_CID_BRIGHTNESS, 0, 31, 1, 3);
 104         v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
 105                         V4L2_CID_CONTRAST, 0, 15, 1, 11);
 106         v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
 107                         V4L2_CID_EXPOSURE, 0, 1023, 1, 256);
 108         v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
 109                         V4L2_CID_GAIN, 0, 255, 1, 64);
 110
 111         return hdl->error;
 112 }
 113
 114 static int st6422_probe(struct sd *sd)
 115 {
 116         if (sd->bridge != BRIDGE_ST6422)
 117                 return -ENODEV;
 118
 119         pr_info("st6422 sensor detected\n");
 120
 121         sd->gspca_dev.cam.cam_mode = st6422_mode;
 122         sd->gspca_dev.cam.nmodes = ARRAY_SIZE(st6422_mode);
 123         return 0;
 124 }
 125
 126 static int st6422_init(struct sd *sd)
 127 {
 128         int err = 0, i;
 129
 130         const u16 st6422_bridge_init[][2] = {
 131                 { STV_ISO_ENABLE, 0x00 }, /* disable capture */
 132                 { 0x1436, 0x00 },
 133                 { 0x1432, 0x03 },       /* 0x00-0x1F brightness */
 134                 { 0x143a, 0xf9 },       /* 0x00-0x0F contrast */
 135                 { 0x0509, 0x38 },       /* R */
 136                 { 0x050a, 0x38 },       /* G */
 137                 { 0x050b, 0x38 },       /* B */
 138                 { 0x050c, 0x2a },
 139                 { 0x050d, 0x01 },
 140
 141
 142                 { 0x1431, 0x00 },       /* 0x00-0x07 ??? */
 143                 { 0x1433, 0x34 },       /* 160x120, 0x00-0x01 night filter */
 144                 { 0x1438, 0x18 },       /* 640x480 */
 145 /* 18 bayes */
 146 /* 10 compressed? */
 147
 148                 { 0x1439, 0x00 },
 149 /* anti-noise?  0xa2 gives a perfect image */
 150
 151                 { 0x143b, 0x05 },
 152                 { 0x143c, 0x00 },       /* 0x00-0x01 - ??? */
 153
 154
 155 /* shutter time 0x0000-0x03FF */
 156 /* low value  give good picures on moving objects (but requires much light) */
 157 /* high value gives good picures in darkness (but tends to be overexposed) */
 158                 { 0x143e, 0x01 },
 159                 { 0x143d, 0x00 },
 160
 161                 { 0x1442, 0xe2 },
 162 /* write: 1x1x xxxx */
 163 /* read:  1x1x xxxx */
 164 /*        bit 5 == button pressed and hold if 0 */
 165 /* write 0xe2,0xea */
 166
 167 /* 0x144a */
 168 /* 0x00 init */
 169 /* bit 7 == button has been pressed, but not handled */
 170
 171 /* interrupt */
 172 /* if(urb->iso_frame_desc[i].status == 0x80) { */
 173 /* if(urb->iso_frame_desc[i].status == 0x88) { */
 174
 175                 { 0x1500, 0xd0 },
 176                 { 0x1500, 0xd0 },
 177                 { 0x1500, 0x50 },       /* 0x00 - 0xFF  0x80 == compr ? */
 178
 179                 { 0x1501, 0xaf },
 180 /* high val-> light area gets darker */
 181 /* low val -> light area gets lighter */
 182                 { 0x1502, 0xc2 },
 183 /* high val-> light area gets darker */
 184 /* low val -> light area gets lighter */
 185                 { 0x1503, 0x45 },
 186 /* high val-> light area gets darker */
 187 /* low val -> light area gets lighter */
 188                 { 0x1505, 0x02 },
 189 /* 2  : 324x248  80352 bytes */
 190 /* 7  : 248x162  40176 bytes */
 191 /* c+f: 162*124  20088 bytes */
 192
 193                 { 0x150e, 0x8e },
 194                 { 0x150f, 0x37 },
 195                 { 0x15c0, 0x00 },
 196                 { 0x15c3, 0x08 },       /* 0x04/0x14 ... test pictures ??? */
 197
 198
 199                 { 0x143f, 0x01 },       /* commit settings */
 200
 201         };
 202
 203         for (i = 0; i < ARRAY_SIZE(st6422_bridge_init) && !err; i++) {
 204                 err = stv06xx_write_bridge(sd, st6422_bridge_init[i][0],
 205                                                st6422_bridge_init[i][1]);
 206         }
 207
 208         return err;
 209 }
 210
 211 static int setbrightness(struct sd *sd, s32 val)
 212 {
 213         /* val goes from 0 -> 31 */
 214         return stv06xx_write_bridge(sd, 0x1432, val);
 215 }
 216
 217 static int setcontrast(struct sd *sd, s32 val)
 218 {
 219         /* Val goes from 0 -> 15 */
 220         return stv06xx_write_bridge(sd, 0x143a, val | 0xf0);
 221 }
 222
 223 static int setgain(struct sd *sd, u8 gain)
 224 {
 225         int err;
 226
 227         /* Set red, green, blue, gain */
 228         err = stv06xx_write_bridge(sd, 0x0509, gain);
 229         if (err < 0)
 230                 return err;
 231
 232         err = stv06xx_write_bridge(sd, 0x050a, gain);
 233         if (err < 0)
 234                 return err;
 235
 236         err = stv06xx_write_bridge(sd, 0x050b, gain);
 237         if (err < 0)
 238                 return err;
 239
 240         /* 2 mystery writes */
 241         err = stv06xx_write_bridge(sd, 0x050c, 0x2a);
 242         if (err < 0)
 243                 return err;
 244
 245         return stv06xx_write_bridge(sd, 0x050d, 0x01);
 246 }
 247
 248 static int setexposure(struct sd *sd, s16 expo)
 249 {
 250         int err;
 251
 252         err = stv06xx_write_bridge(sd, 0x143d, expo & 0xff);
 253         if (err < 0)
 254                 return err;
 255
 256         return stv06xx_write_bridge(sd, 0x143e, expo >> 8);
 257 }
 258
 259 static int st6422_start(struct sd *sd)
 260 {
 261         int err;
 262         struct cam *cam = &sd->gspca_dev.cam;
 263
 264         if (cam->cam_mode[sd->gspca_dev.curr_mode].priv)
 265                 err = stv06xx_write_bridge(sd, 0x1505, 0x0f);
 266         else
 267                 err = stv06xx_write_bridge(sd, 0x1505, 0x02);
 268         if (err < 0)
 269                 return err;
 270
 271         /* commit settings */
 272         err = stv06xx_write_bridge(sd, 0x143f, 0x01);
 273         return (err < 0) ? err : 0;
 274 }
 275
 276 static int st6422_stop(struct sd *sd)
 277 {
 278         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 279
 280         gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");
 281
 282         return 0;
 283 }