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;
  28
  29         err = sn9c102_write_const_regs(cam, {0x00, 0x10}, {0x00, 0x11},
  30                                        {0x00, 0x14}, {0x60, 0x17},
  31                                        {0x0e, 0x18}, {0xf2, 0x19});
  32
  33         err += sn9c102_i2c_write(cam, 0x01, 0x04);
  34         err += sn9c102_i2c_write(cam, 0x02, 0x00);
  35         err += sn9c102_i2c_write(cam, 0x28, 0x00);
  36
  37         return err;
  38 }
  39
  40
  41 static int hv7131d_get_ctrl(struct sn9c102_device* cam,
  42                             struct v4l2_control* ctrl)
  43 {
  44         switch (ctrl->id) {
  45         case V4L2_CID_EXPOSURE:
  46                 {
  47                         int r1 = sn9c102_i2c_read(cam, 0x26),
  48                             r2 = sn9c102_i2c_read(cam, 0x27);
  49                         if (r1 < 0 || r2 < 0)
  50                                 return -EIO;
  51                         ctrl->value = (r1 << 8) | (r2 & 0xff);
  52                 }
  53                 return 0;
  54         case V4L2_CID_RED_BALANCE:
  55                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x31)) < 0)
  56                         return -EIO;
  57                 ctrl->value = 0x3f - (ctrl->value & 0x3f);
  58                 return 0;
  59         case V4L2_CID_BLUE_BALANCE:
  60                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x33)) < 0)
  61                         return -EIO;
  62                 ctrl->value = 0x3f - (ctrl->value & 0x3f);
  63                 return 0;
  64         case SN9C102_V4L2_CID_GREEN_BALANCE:
  65                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x32)) < 0)
  66                         return -EIO;
  67                 ctrl->value = 0x3f - (ctrl->value & 0x3f);
  68                 return 0;
  69         case SN9C102_V4L2_CID_RESET_LEVEL:
  70                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x30)) < 0)
  71                         return -EIO;
  72                 ctrl->value &= 0x3f;
  73                 return 0;
  74         case SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE:
  75                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x34)) < 0)
  76                         return -EIO;
  77                 ctrl->value &= 0x07;
  78                 return 0;
  79         default:
  80                 return -EINVAL;
  81         }
  82 }
  83
  84
  85 static int hv7131d_set_ctrl(struct sn9c102_device* cam,
  86                             const struct v4l2_control* ctrl)
  87 {
  88         int err = 0;
  89
  90         switch (ctrl->id) {
  91         case V4L2_CID_EXPOSURE:
  92                 err += sn9c102_i2c_write(cam, 0x26, ctrl->value >> 8);
  93                 err += sn9c102_i2c_write(cam, 0x27, ctrl->value & 0xff);
  94                 break;
  95         case V4L2_CID_RED_BALANCE:
  96                 err += sn9c102_i2c_write(cam, 0x31, 0x3f - ctrl->value);
  97                 break;
  98         case V4L2_CID_BLUE_BALANCE:
  99                 err += sn9c102_i2c_write(cam, 0x33, 0x3f - ctrl->value);
 100                 break;
 101         case SN9C102_V4L2_CID_GREEN_BALANCE:
 102                 err += sn9c102_i2c_write(cam, 0x32, 0x3f - ctrl->value);
 103                 break;
 104         case SN9C102_V4L2_CID_RESET_LEVEL:
 105                 err += sn9c102_i2c_write(cam, 0x30, ctrl->value);
 106                 break;
 107         case SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE:
 108                 err += sn9c102_i2c_write(cam, 0x34, ctrl->value);
 109                 break;
 110         default:
 111                 return -EINVAL;
 112         }
 113
 114         return err ? -EIO : 0;
 115 }
 116
 117
 118 static int hv7131d_set_crop(struct sn9c102_device* cam,
 119                             const struct v4l2_rect* rect)
 120 {
 121         struct sn9c102_sensor* s = sn9c102_get_sensor(cam);
 122         int err = 0;
 123         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 2,
 124            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 2;
 125
 126         err += sn9c102_write_reg(cam, h_start, 0x12);
 127         err += sn9c102_write_reg(cam, v_start, 0x13);
 128
 129         return err;
 130 }
 131
 132
 133 static int hv7131d_set_pix_format(struct sn9c102_device* cam,
 134                                   const struct v4l2_pix_format* pix)
 135 {
 136         int err = 0;
 137
 138         if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
 139                 err += sn9c102_write_reg(cam, 0x42, 0x19);
 140         else
 141                 err += sn9c102_write_reg(cam, 0xf2, 0x19);
 142
 143         return err;
 144 }
 145
 146
 147 static const struct sn9c102_sensor hv7131d = {
 148         .name = "HV7131D",
 149         .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
 150         .supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102,
 151         .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
 152         .frequency = SN9C102_I2C_100KHZ,
 153         .interface = SN9C102_I2C_2WIRES,
 154         .i2c_slave_id = 0x11,
 155         .init = &hv7131d_init,
 156         .qctrl = {
 157                 {
 158                         .id = V4L2_CID_EXPOSURE,
 159                         .type = V4L2_CTRL_TYPE_INTEGER,
 160                         .name = "exposure",
 161                         .minimum = 0x0250,
 162                         .maximum = 0xffff,
 163                         .step = 0x0001,
 164                         .default_value = 0x0250,
 165                         .flags = 0,
 166                 },
 167                 {
 168                         .id = V4L2_CID_RED_BALANCE,
 169                         .type = V4L2_CTRL_TYPE_INTEGER,
 170                         .name = "red balance",
 171                         .minimum = 0x00,
 172                         .maximum = 0x3f,
 173                         .step = 0x01,
 174                         .default_value = 0x00,
 175                         .flags = 0,
 176                 },
 177                 {
 178                         .id = V4L2_CID_BLUE_BALANCE,
 179                         .type = V4L2_CTRL_TYPE_INTEGER,
 180                         .name = "blue balance",
 181                         .minimum = 0x00,
 182                         .maximum = 0x3f,
 183                         .step = 0x01,
 184                         .default_value = 0x20,
 185                         .flags = 0,
 186                 },
 187                 {
 188                         .id = SN9C102_V4L2_CID_GREEN_BALANCE,
 189                         .type = V4L2_CTRL_TYPE_INTEGER,
 190                         .name = "green balance",
 191                         .minimum = 0x00,
 192                         .maximum = 0x3f,
 193                         .step = 0x01,
 194                         .default_value = 0x1e,
 195                         .flags = 0,
 196                 },
 197                 {
 198                         .id = SN9C102_V4L2_CID_RESET_LEVEL,
 199                         .type = V4L2_CTRL_TYPE_INTEGER,
 200                         .name = "reset level",
 201                         .minimum = 0x19,
 202                         .maximum = 0x3f,
 203                         .step = 0x01,
 204                         .default_value = 0x30,
 205                         .flags = 0,
 206                 },
 207                 {
 208                         .id = SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE,
 209                         .type = V4L2_CTRL_TYPE_INTEGER,
 210                         .name = "pixel bias voltage",
 211                         .minimum = 0x00,
 212                         .maximum = 0x07,
 213                         .step = 0x01,
 214                         .default_value = 0x02,
 215                         .flags = 0,
 216                 },
 217         },
 218         .get_ctrl = &hv7131d_get_ctrl,
 219         .set_ctrl = &hv7131d_set_ctrl,
 220         .cropcap = {
 221                 .bounds = {
 222                         .left = 0,
 223                         .top = 0,
 224                         .width = 640,
 225                         .height = 480,
 226                 },
 227                 .defrect = {
 228                         .left = 0,
 229                         .top = 0,
 230                         .width = 640,
 231                         .height = 480,
 232                 },
 233         },
 234         .set_crop = &hv7131d_set_crop,
 235         .pix_format = {
 236                 .width = 640,
 237                 .height = 480,
 238                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 239                 .priv = 8,
 240         },
 241         .set_pix_format = &hv7131d_set_pix_format
 242 };
 243
 244
 245 int sn9c102_probe_hv7131d(struct sn9c102_device* cam)
 246 {
 247         int r0 = 0, r1 = 0, err;
 248
 249         err = sn9c102_write_const_regs(cam, {0x01, 0x01}, {0x00, 0x01},
 250                                        {0x28, 0x17});
 251
 252         r0 = sn9c102_i2c_try_read(cam, &hv7131d, 0x00);
 253         r1 = sn9c102_i2c_try_read(cam, &hv7131d, 0x01);
 254         if (err || r0 < 0 || r1 < 0)
 255                 return -EIO;
 256
 257         if (r0 != 0x00 || r1 != 0x04)
 258                 return -ENODEV;
 259
 260         sn9c102_attach_sensor(cam, &hv7131d);
 261
 262         return 0;
 263 }