SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/media/video/sn9c102/sn9c102_hv7131d.c

   1 /***************************************************************************
   2  * Plug-in for HV7131D image sensor connected to the SN9C1xx PC Camera     *
   3  * Controllers                                                             *
   4  *                                                                         *
   5  * Copyright (C) 2004-2007 by Luca Risolia <luca.risolia@studio.unibo.it>  *
   6  *                                                                         *
   7  * This program is free software; you can redistribute it and/or modify    *
   8  * it under the terms of the GNU General Public License as published by    *
   9  * the Free Software Foundation; either version 2 of the License, or       *
  10  * (at your option) any later version.                                     *
  11  *                                                                         *
  12  * This program is distributed in the hope that it will be useful,         *
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
  15  * GNU General Public License for more details.                            *
  16  *                                                                         *
  17  * You should have received a copy of the GNU General Public License       *
  18  * along with this program; if not, write to the Free Software             *
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.               *
  20  ***************************************************************************/
  21
  22 #include "sn9c102_sensor.h"
  23
  24
  25 static int hv7131d_init(struct sn9c102_device* cam)
  26 {
  27         int err = 0;
  28
  29         err += sn9c102_write_reg(cam, 0x00, 0x10);
  30         err += sn9c102_write_reg(cam, 0x00, 0x11);
  31         err += sn9c102_write_reg(cam, 0x00, 0x14);
  32         err += sn9c102_write_reg(cam, 0x60, 0x17);
  33         err += sn9c102_write_reg(cam, 0x0e, 0x18);
  34         err += sn9c102_write_reg(cam, 0xf2, 0x19);
  35
  36         err += sn9c102_i2c_write(cam, 0x01, 0x04);
  37         err += sn9c102_i2c_write(cam, 0x02, 0x00);
  38         err += sn9c102_i2c_write(cam, 0x28, 0x00);
  39
  40         return err;
  41 }
  42
  43
  44 static int hv7131d_get_ctrl(struct sn9c102_device* cam,
  45                             struct v4l2_control* ctrl)
  46 {
  47         switch (ctrl->id) {
  48         case V4L2_CID_EXPOSURE:
  49                 {
  50                         int r1 = sn9c102_i2c_read(cam, 0x26),
  51                             r2 = sn9c102_i2c_read(cam, 0x27);
  52                         if (r1 < 0 || r2 < 0)
  53                                 return -EIO;
  54                         ctrl->value = (r1 << 8) | (r2 & 0xff);
  55                 }
  56                 return 0;
  57         case V4L2_CID_RED_BALANCE:
  58                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x31)) < 0)
  59                         return -EIO;
  60                 ctrl->value = 0x3f - (ctrl->value & 0x3f);
  61                 return 0;
  62         case V4L2_CID_BLUE_BALANCE:
  63                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x33)) < 0)
  64                         return -EIO;
  65                 ctrl->value = 0x3f - (ctrl->value & 0x3f);
  66                 return 0;
  67         case SN9C102_V4L2_CID_GREEN_BALANCE:
  68                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x32)) < 0)
  69                         return -EIO;
  70                 ctrl->value = 0x3f - (ctrl->value & 0x3f);
  71                 return 0;
  72         case SN9C102_V4L2_CID_RESET_LEVEL:
  73                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x30)) < 0)
  74                         return -EIO;
  75                 ctrl->value &= 0x3f;
  76                 return 0;
  77         case SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE:
  78                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x34)) < 0)
  79                         return -EIO;
  80                 ctrl->value &= 0x07;
  81                 return 0;
  82         default:
  83                 return -EINVAL;
  84         }
  85 }
  86
  87
  88 static int hv7131d_set_ctrl(struct sn9c102_device* cam,
  89                             const struct v4l2_control* ctrl)
  90 {
  91         int err = 0;
  92
  93         switch (ctrl->id) {
  94         case V4L2_CID_EXPOSURE:
  95                 err += sn9c102_i2c_write(cam, 0x26, ctrl->value >> 8);
  96                 err += sn9c102_i2c_write(cam, 0x27, ctrl->value & 0xff);
  97                 break;
  98         case V4L2_CID_RED_BALANCE:
  99                 err += sn9c102_i2c_write(cam, 0x31, 0x3f - ctrl->value);
 100                 break;
 101         case V4L2_CID_BLUE_BALANCE:
 102                 err += sn9c102_i2c_write(cam, 0x33, 0x3f - ctrl->value);
 103                 break;
 104         case SN9C102_V4L2_CID_GREEN_BALANCE:
 105                 err += sn9c102_i2c_write(cam, 0x32, 0x3f - ctrl->value);
 106                 break;
 107         case SN9C102_V4L2_CID_RESET_LEVEL:
 108                 err += sn9c102_i2c_write(cam, 0x30, ctrl->value);
 109                 break;
 110         case SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE:
 111                 err += sn9c102_i2c_write(cam, 0x34, ctrl->value);
 112                 break;
 113         default:
 114                 return -EINVAL;
 115         }
 116
 117         return err ? -EIO : 0;
 118 }
 119
 120
 121 static int hv7131d_set_crop(struct sn9c102_device* cam,
 122                             const struct v4l2_rect* rect)
 123 {
 124         struct sn9c102_sensor* s = sn9c102_get_sensor(cam);
 125         int err = 0;
 126         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 2,
 127            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 2;
 128
 129         err += sn9c102_write_reg(cam, h_start, 0x12);
 130         err += sn9c102_write_reg(cam, v_start, 0x13);
 131
 132         return err;
 133 }
 134
 135
 136 static int hv7131d_set_pix_format(struct sn9c102_device* cam,
 137                                   const struct v4l2_pix_format* pix)
 138 {
 139         int err = 0;
 140
 141         if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
 142                 err += sn9c102_write_reg(cam, 0x42, 0x19);
 143         else
 144                 err += sn9c102_write_reg(cam, 0xf2, 0x19);
 145
 146         return err;
 147 }
 148
 149
 150 static struct sn9c102_sensor hv7131d = {
 151         .name = "HV7131D",
 152         .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
 153         .supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102,
 154         .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
 155         .frequency = SN9C102_I2C_100KHZ,
 156         .interface = SN9C102_I2C_2WIRES,
 157         .i2c_slave_id = 0x11,
 158         .init = &hv7131d_init,
 159         .qctrl = {
 160                 {
 161                         .id = V4L2_CID_EXPOSURE,
 162                         .type = V4L2_CTRL_TYPE_INTEGER,
 163                         .name = "exposure",
 164                         .minimum = 0x0250,
 165                         .maximum = 0xffff,
 166                         .step = 0x0001,
 167                         .default_value = 0x0250,
 168                         .flags = 0,
 169                 },
 170                 {
 171                         .id = V4L2_CID_RED_BALANCE,
 172                         .type = V4L2_CTRL_TYPE_INTEGER,
 173                         .name = "red balance",
 174                         .minimum = 0x00,
 175                         .maximum = 0x3f,
 176                         .step = 0x01,
 177                         .default_value = 0x00,
 178                         .flags = 0,
 179                 },
 180                 {
 181                         .id = V4L2_CID_BLUE_BALANCE,
 182                         .type = V4L2_CTRL_TYPE_INTEGER,
 183                         .name = "blue balance",
 184                         .minimum = 0x00,
 185                         .maximum = 0x3f,
 186                         .step = 0x01,
 187                         .default_value = 0x20,
 188                         .flags = 0,
 189                 },
 190                 {
 191                         .id = SN9C102_V4L2_CID_GREEN_BALANCE,
 192                         .type = V4L2_CTRL_TYPE_INTEGER,
 193                         .name = "green balance",
 194                         .minimum = 0x00,
 195                         .maximum = 0x3f,
 196                         .step = 0x01,
 197                         .default_value = 0x1e,
 198                         .flags = 0,
 199                 },
 200                 {
 201                         .id = SN9C102_V4L2_CID_RESET_LEVEL,
 202                         .type = V4L2_CTRL_TYPE_INTEGER,
 203                         .name = "reset level",
 204                         .minimum = 0x19,
 205                         .maximum = 0x3f,
 206                         .step = 0x01,
 207                         .default_value = 0x30,
 208                         .flags = 0,
 209                 },
 210                 {
 211                         .id = SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE,
 212                         .type = V4L2_CTRL_TYPE_INTEGER,
 213                         .name = "pixel bias voltage",
 214                         .minimum = 0x00,
 215                         .maximum = 0x07,
 216                         .step = 0x01,
 217                         .default_value = 0x02,
 218                         .flags = 0,
 219                 },
 220         },
 221         .get_ctrl = &hv7131d_get_ctrl,
 222         .set_ctrl = &hv7131d_set_ctrl,
 223         .cropcap = {
 224                 .bounds = {
 225                         .left = 0,
 226                         .top = 0,
 227                         .width = 640,
 228                         .height = 480,
 229                 },
 230                 .defrect = {
 231                         .left = 0,
 232                         .top = 0,
 233                         .width = 640,
 234                         .height = 480,
 235                 },
 236         },
 237         .set_crop = &hv7131d_set_crop,
 238         .pix_format = {
 239                 .width = 640,
 240                 .height = 480,
 241                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 242                 .priv = 8,
 243         },
 244         .set_pix_format = &hv7131d_set_pix_format
 245 };
 246
 247
 248 int sn9c102_probe_hv7131d(struct sn9c102_device* cam)
 249 {
 250         int r0 = 0, r1 = 0, err = 0;
 251
 252         err += sn9c102_write_reg(cam, 0x01, 0x01);
 253         err += sn9c102_write_reg(cam, 0x00, 0x01);
 254         err += sn9c102_write_reg(cam, 0x28, 0x17);
 255         if (err)
 256                 return -EIO;
 257
 258         r0 = sn9c102_i2c_try_read(cam, &hv7131d, 0x00);
 259         r1 = sn9c102_i2c_try_read(cam, &hv7131d, 0x01);
 260         if (r0 < 0 || r1 < 0)
 261                 return -EIO;
 262
 263         if (r0 != 0x00 || r1 != 0x04)
 264                 return -ENODEV;
 265
 266         sn9c102_attach_sensor(cam, &hv7131d);
 267
 268         return 0;
 269 }