drivers/media/video/sn9c102/sn9c102_pas106b.c

   1 /***************************************************************************
   2  * Plug-in for PAS106B 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 <linux/delay.h>
  23 #include "sn9c102_sensor.h"
  24
  25
  26 static int pas106b_init(struct sn9c102_device* cam)
  27 {
  28         int err = 0;
  29
  30         err += sn9c102_write_reg(cam, 0x00, 0x10);
  31         err += sn9c102_write_reg(cam, 0x00, 0x11);
  32         err += sn9c102_write_reg(cam, 0x00, 0x14);
  33         err += sn9c102_write_reg(cam, 0x20, 0x17);
  34         err += sn9c102_write_reg(cam, 0x20, 0x19);
  35         err += sn9c102_write_reg(cam, 0x09, 0x18);
  36
  37         err += sn9c102_i2c_write(cam, 0x02, 0x0c);
  38         err += sn9c102_i2c_write(cam, 0x05, 0x5a);
  39         err += sn9c102_i2c_write(cam, 0x06, 0x88);
  40         err += sn9c102_i2c_write(cam, 0x07, 0x80);
  41         err += sn9c102_i2c_write(cam, 0x10, 0x06);
  42         err += sn9c102_i2c_write(cam, 0x11, 0x06);
  43         err += sn9c102_i2c_write(cam, 0x12, 0x00);
  44         err += sn9c102_i2c_write(cam, 0x14, 0x02);
  45         err += sn9c102_i2c_write(cam, 0x13, 0x01);
  46
  47         msleep(400);
  48
  49         return err;
  50 }
  51
  52
  53 static int pas106b_get_ctrl(struct sn9c102_device* cam,
  54                             struct v4l2_control* ctrl)
  55 {
  56         switch (ctrl->id) {
  57         case V4L2_CID_EXPOSURE:
  58                 {
  59                         int r1 = sn9c102_i2c_read(cam, 0x03),
  60                             r2 = sn9c102_i2c_read(cam, 0x04);
  61                         if (r1 < 0 || r2 < 0)
  62                                 return -EIO;
  63                         ctrl->value = (r1 << 4) | (r2 & 0x0f);
  64                 }
  65                 return 0;
  66         case V4L2_CID_RED_BALANCE:
  67                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0c)) < 0)
  68                         return -EIO;
  69                 ctrl->value &= 0x1f;
  70                 return 0;
  71         case V4L2_CID_BLUE_BALANCE:
  72                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x09)) < 0)
  73                         return -EIO;
  74                 ctrl->value &= 0x1f;
  75                 return 0;
  76         case V4L2_CID_GAIN:
  77                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0e)) < 0)
  78                         return -EIO;
  79                 ctrl->value &= 0x1f;
  80                 return 0;
  81         case V4L2_CID_CONTRAST:
  82                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0f)) < 0)
  83                         return -EIO;
  84                 ctrl->value &= 0x07;
  85                 return 0;
  86         case SN9C102_V4L2_CID_GREEN_BALANCE:
  87                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0a)) < 0)
  88                         return -EIO;
  89                 ctrl->value = (ctrl->value & 0x1f) << 1;
  90                 return 0;
  91         case SN9C102_V4L2_CID_DAC_MAGNITUDE:
  92                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x08)) < 0)
  93                         return -EIO;
  94                 ctrl->value &= 0xf8;
  95                 return 0;
  96         default:
  97                 return -EINVAL;
  98         }
  99 }
 100
 101
 102 static int pas106b_set_ctrl(struct sn9c102_device* cam,
 103                             const struct v4l2_control* ctrl)
 104 {
 105         int err = 0;
 106
 107         switch (ctrl->id) {
 108         case V4L2_CID_EXPOSURE:
 109                 err += sn9c102_i2c_write(cam, 0x03, ctrl->value >> 4);
 110                 err += sn9c102_i2c_write(cam, 0x04, ctrl->value & 0x0f);
 111                 break;
 112         case V4L2_CID_RED_BALANCE:
 113                 err += sn9c102_i2c_write(cam, 0x0c, ctrl->value);
 114                 break;
 115         case V4L2_CID_BLUE_BALANCE:
 116                 err += sn9c102_i2c_write(cam, 0x09, ctrl->value);
 117                 break;
 118         case V4L2_CID_GAIN:
 119                 err += sn9c102_i2c_write(cam, 0x0e, ctrl->value);
 120                 break;
 121         case V4L2_CID_CONTRAST:
 122                 err += sn9c102_i2c_write(cam, 0x0f, ctrl->value);
 123                 break;
 124         case SN9C102_V4L2_CID_GREEN_BALANCE:
 125                 err += sn9c102_i2c_write(cam, 0x0a, ctrl->value >> 1);
 126                 err += sn9c102_i2c_write(cam, 0x0b, ctrl->value >> 1);
 127                 break;
 128         case SN9C102_V4L2_CID_DAC_MAGNITUDE:
 129                 err += sn9c102_i2c_write(cam, 0x08, ctrl->value << 3);
 130                 break;
 131         default:
 132                 return -EINVAL;
 133         }
 134         err += sn9c102_i2c_write(cam, 0x13, 0x01);
 135
 136         return err ? -EIO : 0;
 137 }
 138
 139
 140 static int pas106b_set_crop(struct sn9c102_device* cam,
 141                             const struct v4l2_rect* rect)
 142 {
 143         struct sn9c102_sensor* s = sn9c102_get_sensor(cam);
 144         int err = 0;
 145         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4,
 146            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
 147
 148         err += sn9c102_write_reg(cam, h_start, 0x12);
 149         err += sn9c102_write_reg(cam, v_start, 0x13);
 150
 151         return err;
 152 }
 153
 154
 155 static int pas106b_set_pix_format(struct sn9c102_device* cam,
 156                                   const struct v4l2_pix_format* pix)
 157 {
 158         int err = 0;
 159
 160         if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
 161                 err += sn9c102_write_reg(cam, 0x2c, 0x17);
 162         else
 163                 err += sn9c102_write_reg(cam, 0x20, 0x17);
 164
 165         return err;
 166 }
 167
 168
 169 static struct sn9c102_sensor pas106b = {
 170         .name = "PAS106B",
 171         .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
 172         .supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102,
 173         .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
 174         .frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
 175         .interface = SN9C102_I2C_2WIRES,
 176         .i2c_slave_id = 0x40,
 177         .init = &pas106b_init,
 178         .qctrl = {
 179                 {
 180                         .id = V4L2_CID_EXPOSURE,
 181                         .type = V4L2_CTRL_TYPE_INTEGER,
 182                         .name = "exposure",
 183                         .minimum = 0x125,
 184                         .maximum = 0xfff,
 185                         .step = 0x001,
 186                         .default_value = 0x140,
 187                         .flags = 0,
 188                 },
 189                 {
 190                         .id = V4L2_CID_GAIN,
 191                         .type = V4L2_CTRL_TYPE_INTEGER,
 192                         .name = "global gain",
 193                         .minimum = 0x00,
 194                         .maximum = 0x1f,
 195                         .step = 0x01,
 196                         .default_value = 0x0d,
 197                         .flags = 0,
 198                 },
 199                 {
 200                         .id = V4L2_CID_CONTRAST,
 201                         .type = V4L2_CTRL_TYPE_INTEGER,
 202                         .name = "contrast",
 203                         .minimum = 0x00,
 204                         .maximum = 0x07,
 205                         .step = 0x01,
 206                         .default_value = 0x00, /* 0x00~0x03 have same effect */
 207                         .flags = 0,
 208                 },
 209                 {
 210                         .id = V4L2_CID_RED_BALANCE,
 211                         .type = V4L2_CTRL_TYPE_INTEGER,
 212                         .name = "red balance",
 213                         .minimum = 0x00,
 214                         .maximum = 0x1f,
 215                         .step = 0x01,
 216                         .default_value = 0x04,
 217                         .flags = 0,
 218                 },
 219                 {
 220                         .id = V4L2_CID_BLUE_BALANCE,
 221                         .type = V4L2_CTRL_TYPE_INTEGER,
 222                         .name = "blue balance",
 223                         .minimum = 0x00,
 224                         .maximum = 0x1f,
 225                         .step = 0x01,
 226                         .default_value = 0x06,
 227                         .flags = 0,
 228                 },
 229                 {
 230                         .id = SN9C102_V4L2_CID_GREEN_BALANCE,
 231                         .type = V4L2_CTRL_TYPE_INTEGER,
 232                         .name = "green balance",
 233                         .minimum = 0x00,
 234                         .maximum = 0x3e,
 235                         .step = 0x02,
 236                         .default_value = 0x02,
 237                         .flags = 0,
 238                 },
 239                 {
 240                         .id = SN9C102_V4L2_CID_DAC_MAGNITUDE,
 241                         .type = V4L2_CTRL_TYPE_INTEGER,
 242                         .name = "DAC magnitude",
 243                         .minimum = 0x00,
 244                         .maximum = 0x1f,
 245                         .step = 0x01,
 246                         .default_value = 0x01,
 247                         .flags = 0,
 248                 },
 249         },
 250         .get_ctrl = &pas106b_get_ctrl,
 251         .set_ctrl = &pas106b_set_ctrl,
 252         .cropcap = {
 253                 .bounds = {
 254                         .left = 0,
 255                         .top = 0,
 256                         .width = 352,
 257                         .height = 288,
 258                 },
 259                 .defrect = {
 260                         .left = 0,
 261                         .top = 0,
 262                         .width = 352,
 263                         .height = 288,
 264                 },
 265         },
 266         .set_crop = &pas106b_set_crop,
 267         .pix_format = {
 268                 .width = 352,
 269                 .height = 288,
 270                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 271                 .priv = 8, /* we use this field as 'bits per pixel' */
 272         },
 273         .set_pix_format = &pas106b_set_pix_format
 274 };
 275
 276
 277 int sn9c102_probe_pas106b(struct sn9c102_device* cam)
 278 {
 279         int r0 = 0, r1 = 0, err = 0;
 280         unsigned int pid = 0;
 281
 282         /*
 283            Minimal initialization to enable the I2C communication
 284            NOTE: do NOT change the values!
 285         */
 286         err += sn9c102_write_reg(cam, 0x01, 0x01); /* sensor power down */
 287         err += sn9c102_write_reg(cam, 0x00, 0x01); /* sensor power on */
 288         err += sn9c102_write_reg(cam, 0x28, 0x17); /* sensor clock at 24 MHz */
 289         if (err)
 290                 return -EIO;
 291
 292         r0 = sn9c102_i2c_try_read(cam, &pas106b, 0x00);
 293         r1 = sn9c102_i2c_try_read(cam, &pas106b, 0x01);
 294
 295         if (r0 < 0 || r1 < 0)
 296                 return -EIO;
 297
 298         pid = (r0 << 11) | ((r1 & 0xf0) >> 4);
 299         if (pid != 0x007)
 300                 return -ENODEV;
 301
 302         sn9c102_attach_sensor(cam, &pas106b);
 303
 304         return 0;
 305 }