drivers/usb/media/sn9c102_pas106b.c

   1 /***************************************************************************
   2  * Driver for PAS106B image sensor connected to the SN9C10[12] PC Camera   *
   3  * Controllers                                                             *
   4  *                                                                         *
   5  * Copyright (C) 2004 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 <linux/delay.h>
  23 #include "sn9c102_sensor.h"
  24
  25
  26 static struct sn9c102_sensor pas106b;
  27
  28
  29 static int pas106b_init(struct sn9c102_device* cam)
  30 {
  31         int err = 0;
  32
  33         err += sn9c102_write_reg(cam, 0x00, 0x10);
  34         err += sn9c102_write_reg(cam, 0x00, 0x11);
  35         err += sn9c102_write_reg(cam, 0x00, 0x14);
  36         err += sn9c102_write_reg(cam, 0x20, 0x17);
  37         err += sn9c102_write_reg(cam, 0x20, 0x19);
  38         err += sn9c102_write_reg(cam, 0x09, 0x18);
  39
  40         err += sn9c102_i2c_write(cam, 0x02, 0x0c);
  41         err += sn9c102_i2c_write(cam, 0x03, 0x12);
  42         err += sn9c102_i2c_write(cam, 0x04, 0x05);
  43         err += sn9c102_i2c_write(cam, 0x05, 0x5a);
  44         err += sn9c102_i2c_write(cam, 0x06, 0x88);
  45         err += sn9c102_i2c_write(cam, 0x07, 0x80);
  46         err += sn9c102_i2c_write(cam, 0x08, 0x01);
  47         err += sn9c102_i2c_write(cam, 0x0a, 0x01);
  48         err += sn9c102_i2c_write(cam, 0x0b, 0x00);
  49         err += sn9c102_i2c_write(cam, 0x10, 0x06);
  50         err += sn9c102_i2c_write(cam, 0x11, 0x06);
  51         err += sn9c102_i2c_write(cam, 0x12, 0x00);
  52         err += sn9c102_i2c_write(cam, 0x14, 0x02);
  53         err += sn9c102_i2c_write(cam, 0x13, 0x01);
  54
  55         msleep(400);
  56
  57         return err;
  58 }
  59
  60
  61 static int pas106b_get_ctrl(struct sn9c102_device* cam,
  62                             struct v4l2_control* ctrl)
  63 {
  64         switch (ctrl->id) {
  65         case V4L2_CID_RED_BALANCE:
  66                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0c)) < 0)
  67                         return -EIO;
  68                 ctrl->value &= 0x1f;
  69                 return 0;
  70         case V4L2_CID_BLUE_BALANCE:
  71                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x09)) < 0)
  72                         return -EIO;
  73                 ctrl->value &= 0x1f;
  74                 return 0;
  75         case V4L2_CID_GAIN:
  76                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0e)) < 0)
  77                         return -EIO;
  78                 ctrl->value &= 0x1f;
  79                 return 0;
  80         case V4L2_CID_BRIGHTNESS:
  81                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0d)) < 0)
  82                         return -EIO;
  83                 ctrl->value &= 0x1f;
  84                 return 0;
  85         case V4L2_CID_CONTRAST:
  86                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0f)) < 0)
  87                         return -EIO;
  88                 ctrl->value &= 0x07;
  89                 return 0;
  90         default:
  91                 return -EINVAL;
  92         }
  93 }
  94
  95
  96 static int pas106b_set_ctrl(struct sn9c102_device* cam,
  97                             const struct v4l2_control* ctrl)
  98 {
  99         int err = 0;
 100
 101         switch (ctrl->id) {
 102         case V4L2_CID_RED_BALANCE:
 103                 err += sn9c102_i2c_write(cam, 0x0c, ctrl->value & 0x1f);
 104                 break;
 105         case V4L2_CID_BLUE_BALANCE:
 106                 err += sn9c102_i2c_write(cam, 0x09, ctrl->value & 0x1f);
 107                 break;
 108         case V4L2_CID_GAIN:
 109                 err += sn9c102_i2c_write(cam, 0x0e, ctrl->value & 0x1f);
 110                 break;
 111         case V4L2_CID_BRIGHTNESS:
 112                 err += sn9c102_i2c_write(cam, 0x0d, 0x1f-(ctrl->value & 0x1f));
 113                 break;
 114         case V4L2_CID_CONTRAST:
 115                 err += sn9c102_i2c_write(cam, 0x0f, ctrl->value & 0x03);
 116                 break;
 117         default:
 118                 return -EINVAL;
 119         }
 120         err += sn9c102_i2c_write(cam, 0x13, 0x01);
 121
 122         return err;
 123 }
 124
 125
 126 static int pas106b_set_crop(struct sn9c102_device* cam,
 127                             const struct v4l2_rect* rect)
 128 {
 129         struct sn9c102_sensor* s = &pas106b;
 130         int err = 0;
 131         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4,
 132            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
 133
 134         err += sn9c102_write_reg(cam, h_start, 0x12);
 135         err += sn9c102_write_reg(cam, v_start, 0x13);
 136
 137         return err;
 138 }
 139
 140
 141 static struct sn9c102_sensor pas106b = {
 142         .name = "PAS106B",
 143         .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
 144         .frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
 145         .interface = SN9C102_I2C_2WIRES,
 146         .slave_read_id = 0x40,
 147         .slave_write_id = 0x40,
 148         .init = &pas106b_init,
 149         .qctrl = {
 150                 {
 151                         .id = V4L2_CID_RED_BALANCE,
 152                         .type = V4L2_CTRL_TYPE_INTEGER,
 153                         .name = "red balance",
 154                         .minimum = 0x00,
 155                         .maximum = 0x1f,
 156                         .step = 0x01,
 157                         .default_value = 0x04,
 158                         .flags = 0,
 159                 },
 160                 {
 161                         .id = V4L2_CID_BLUE_BALANCE,
 162                         .type = V4L2_CTRL_TYPE_INTEGER,
 163                         .name = "blue balance",
 164                         .minimum = 0x00,
 165                         .maximum = 0x1f,
 166                         .step = 0x01,
 167                         .default_value = 0x06,
 168                         .flags = 0,
 169                 },
 170                 {
 171                         .id = V4L2_CID_GAIN,
 172                         .type = V4L2_CTRL_TYPE_INTEGER,
 173                         .name = "global gain",
 174                         .minimum = 0x00,
 175                         .maximum = 0x1f,
 176                         .step = 0x01,
 177                         .default_value = 0x0d,
 178                         .flags = 0,
 179                 },
 180                 {
 181                         .id = V4L2_CID_BRIGHTNESS,
 182                         .type = V4L2_CTRL_TYPE_INTEGER,
 183                         .name = "brightness",
 184                         .minimum = 0x00,
 185                         .maximum = 0x1f,
 186                         .step = 0x01,
 187                         .default_value = 0x1f,
 188                         .flags = 0,
 189                 },
 190                 {
 191                         .id = V4L2_CID_CONTRAST,
 192                         .type = V4L2_CTRL_TYPE_INTEGER,
 193                         .name = "contrast",
 194                         .minimum = 0x00,
 195                         .maximum = 0x07,
 196                         .step = 0x01,
 197                         .default_value = 0x00, /* 0x00~0x03 have same effect */
 198                         .flags = 0,
 199                 },
 200         },
 201         .get_ctrl = &pas106b_get_ctrl,
 202         .set_ctrl = &pas106b_set_ctrl,
 203         .cropcap = {
 204                 .bounds = {
 205                         .left = 0,
 206                         .top = 0,
 207                         .width = 352,
 208                         .height = 288,
 209                 },
 210                 .defrect = {
 211                         .left = 0,
 212                         .top = 0,
 213                         .width = 352,
 214                         .height = 288,
 215                 },
 216         },
 217         .set_crop = &pas106b_set_crop,
 218         .pix_format = {
 219                 .width = 352,
 220                 .height = 288,
 221                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 222                 .priv = 8, /* we use this field as 'bits per pixel' */
 223         }
 224 };
 225
 226
 227 int sn9c102_probe_pas106b(struct sn9c102_device* cam)
 228 {
 229         int r0 = 0, r1 = 0, err = 0;
 230         unsigned int pid = 0;
 231
 232         /*
 233            Minimal initialization to enable the I2C communication
 234            NOTE: do NOT change the values!
 235         */
 236         err += sn9c102_write_reg(cam, 0x01, 0x01); /* sensor power down */
 237         err += sn9c102_write_reg(cam, 0x00, 0x01); /* sensor power on */
 238         err += sn9c102_write_reg(cam, 0x28, 0x17); /* sensor clock at 24 MHz */
 239         if (err)
 240                 return -EIO;
 241
 242         r0 = sn9c102_i2c_try_read(cam, &pas106b, 0x00);
 243         r1 = sn9c102_i2c_try_read(cam, &pas106b, 0x01);
 244
 245         if (r0 < 0 || r1 < 0)
 246                 return -EIO;
 247
 248         pid = (r0 << 11) | ((r1 & 0xf0) >> 4);
 249         if (pid != 0x007)
 250                 return -ENODEV;
 251
 252         sn9c102_attach_sensor(cam, &pas106b);
 253
 254         return 0;
 255 }