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 #include "sn9c102_devtable.h"
  24
  25
  26 static int hv7131d_init(struct sn9c102_device* cam)
  27 {
  28         int err;
  29
  30         err = sn9c102_write_const_regs(cam, {0x00, 0x10}, {0x00, 0x11},
  31                                        {0x00, 0x14}, {0x60, 0x17},
  32                                        {0x0e, 0x18}, {0xf2, 0x19});
  33
  34         err += sn9c102_i2c_write(cam, 0x01, 0x04);
  35         err += sn9c102_i2c_write(cam, 0x02, 0x00);
  36         err += sn9c102_i2c_write(cam, 0x28, 0x00);
  37
  38         return err;
  39 }
  40
  41
  42 static int hv7131d_get_ctrl(struct sn9c102_device* cam,
  43                             struct v4l2_control* ctrl)
  44 {
  45         switch (ctrl->id) {
  46         case V4L2_CID_EXPOSURE:
  47                 {
  48                         int r1 = sn9c102_i2c_read(cam, 0x26),
  49                             r2 = sn9c102_i2c_read(cam, 0x27);
  50                         if (r1 < 0 || r2 < 0)
  51                                 return -EIO;
  52                         ctrl->value = (r1 << 8) | (r2 & 0xff);
  53                 }
  54                 return 0;
  55         case V4L2_CID_RED_BALANCE:
  56                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x31)) < 0)
  57                         return -EIO;
  58                 ctrl->value = 0x3f - (ctrl->value & 0x3f);
  59                 return 0;
  60         case V4L2_CID_BLUE_BALANCE:
  61                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x33)) < 0)
  62                         return -EIO;
  63                 ctrl->value = 0x3f - (ctrl->value & 0x3f);
  64                 return 0;
  65         case SN9C102_V4L2_CID_GREEN_BALANCE:
  66                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x32)) < 0)
  67                         return -EIO;
  68                 ctrl->value = 0x3f - (ctrl->value & 0x3f);
  69                 return 0;
  70         case SN9C102_V4L2_CID_RESET_LEVEL:
  71                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x30)) < 0)
  72                         return -EIO;
  73                 ctrl->value &= 0x3f;
  74                 return 0;
  75         case SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE:
  76                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x34)) < 0)
  77                         return -EIO;
  78                 ctrl->value &= 0x07;
  79                 return 0;
  80         default:
  81                 return -EINVAL;
  82         }
  83 }
  84
  85
  86 static int hv7131d_set_ctrl(struct sn9c102_device* cam,
  87                             const struct v4l2_control* ctrl)
  88 {
  89         int err = 0;
  90
  91         switch (ctrl->id) {
  92         case V4L2_CID_EXPOSURE:
  93                 err += sn9c102_i2c_write(cam, 0x26, ctrl->value >> 8);
  94                 err += sn9c102_i2c_write(cam, 0x27, ctrl->value & 0xff);
  95                 break;
  96         case V4L2_CID_RED_BALANCE:
  97                 err += sn9c102_i2c_write(cam, 0x31, 0x3f - ctrl->value);
  98                 break;
  99         case V4L2_CID_BLUE_BALANCE:
 100                 err += sn9c102_i2c_write(cam, 0x33, 0x3f - ctrl->value);
 101                 break;
 102         case SN9C102_V4L2_CID_GREEN_BALANCE:
 103                 err += sn9c102_i2c_write(cam, 0x32, 0x3f - ctrl->value);
 104                 break;
 105         case SN9C102_V4L2_CID_RESET_LEVEL:
 106                 err += sn9c102_i2c_write(cam, 0x30, ctrl->value);
 107                 break;
 108         case SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE:
 109                 err += sn9c102_i2c_write(cam, 0x34, ctrl->value);
 110                 break;
 111         default:
 112                 return -EINVAL;
 113         }
 114
 115         return err ? -EIO : 0;
 116 }
 117
 118
 119 static int hv7131d_set_crop(struct sn9c102_device* cam,
 120                             const struct v4l2_rect* rect)
 121 {
 122         struct sn9c102_sensor* s = sn9c102_get_sensor(cam);
 123         int err = 0;
 124         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 2,
 125            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 2;
 126
 127         err += sn9c102_write_reg(cam, h_start, 0x12);
 128         err += sn9c102_write_reg(cam, v_start, 0x13);
 129
 130         return err;
 131 }
 132
 133
 134 static int hv7131d_set_pix_format(struct sn9c102_device* cam,
 135                                   const struct v4l2_pix_format* pix)
 136 {
 137         int err = 0;
 138
 139         if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
 140                 err += sn9c102_write_reg(cam, 0x42, 0x19);
 141         else
 142                 err += sn9c102_write_reg(cam, 0xf2, 0x19);
 143
 144         return err;
 145 }
 146
 147
 148 static const struct sn9c102_sensor hv7131d = {
 149         .name = "HV7131D",
 150         .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
 151         .supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102,
 152         .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
 153         .frequency = SN9C102_I2C_100KHZ,
 154         .interface = SN9C102_I2C_2WIRES,
 155         .i2c_slave_id = 0x11,
 156         .init = &hv7131d_init,
 157         .qctrl = {
 158                 {
 159                         .id = V4L2_CID_EXPOSURE,
 160                         .type = V4L2_CTRL_TYPE_INTEGER,
 161                         .name = "exposure",
 162                         .minimum = 0x0250,
 163                         .maximum = 0xffff,
 164                         .step = 0x0001,
 165                         .default_value = 0x0250,
 166                         .flags = 0,
 167                 },
 168                 {
 169                         .id = V4L2_CID_RED_BALANCE,
 170                         .type = V4L2_CTRL_TYPE_INTEGER,
 171                         .name = "red balance",
 172                         .minimum = 0x00,
 173                         .maximum = 0x3f,
 174                         .step = 0x01,
 175                         .default_value = 0x00,
 176                         .flags = 0,
 177                 },
 178                 {
 179                         .id = V4L2_CID_BLUE_BALANCE,
 180                         .type = V4L2_CTRL_TYPE_INTEGER,
 181                         .name = "blue balance",
 182                         .minimum = 0x00,
 183                         .maximum = 0x3f,
 184                         .step = 0x01,
 185                         .default_value = 0x20,
 186                         .flags = 0,
 187                 },
 188                 {
 189                         .id = SN9C102_V4L2_CID_GREEN_BALANCE,
 190                         .type = V4L2_CTRL_TYPE_INTEGER,
 191                         .name = "green balance",
 192                         .minimum = 0x00,
 193                         .maximum = 0x3f,
 194                         .step = 0x01,
 195                         .default_value = 0x1e,
 196                         .flags = 0,
 197                 },
 198                 {
 199                         .id = SN9C102_V4L2_CID_RESET_LEVEL,
 200                         .type = V4L2_CTRL_TYPE_INTEGER,
 201                         .name = "reset level",
 202                         .minimum = 0x19,
 203                         .maximum = 0x3f,
 204                         .step = 0x01,
 205                         .default_value = 0x30,
 206                         .flags = 0,
 207                 },
 208                 {
 209                         .id = SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE,
 210                         .type = V4L2_CTRL_TYPE_INTEGER,
 211                         .name = "pixel bias voltage",
 212                         .minimum = 0x00,
 213                         .maximum = 0x07,
 214                         .step = 0x01,
 215                         .default_value = 0x02,
 216                         .flags = 0,
 217                 },
 218         },
 219         .get_ctrl = &hv7131d_get_ctrl,
 220         .set_ctrl = &hv7131d_set_ctrl,
 221         .cropcap = {
 222                 .bounds = {
 223                         .left = 0,
 224                         .top = 0,
 225                         .width = 640,
 226                         .height = 480,
 227                 },
 228                 .defrect = {
 229                         .left = 0,
 230                         .top = 0,
 231                         .width = 640,
 232                         .height = 480,
 233                 },
 234         },
 235         .set_crop = &hv7131d_set_crop,
 236         .pix_format = {
 237                 .width = 640,
 238                 .height = 480,
 239                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 240                 .priv = 8,
 241         },
 242         .set_pix_format = &hv7131d_set_pix_format
 243 };
 244
 245
 246 int sn9c102_probe_hv7131d(struct sn9c102_device* cam)
 247 {
 248         int r0 = 0, r1 = 0, err;
 249
 250         err = sn9c102_write_const_regs(cam, {0x01, 0x01}, {0x00, 0x01},
 251                                        {0x28, 0x17});
 252
 253         r0 = sn9c102_i2c_try_read(cam, &hv7131d, 0x00);
 254         r1 = sn9c102_i2c_try_read(cam, &hv7131d, 0x01);
 255         if (err || r0 < 0 || r1 < 0)
 256                 return -EIO;
 257
 258         if ((r0 != 0x00 && r0 != 0x01) || r1 != 0x04)
 259                 return -ENODEV;
 260
 261         sn9c102_attach_sensor(cam, &hv7131d);
 262
 263         return 0;
 264 }