drivers/usb/media/sn9c102_pas106b.c

   1 /***************************************************************************
   2  * Plug-in for PAS106B image sensor connected to the SN9C10x PC Camera     *
   3  * Controllers                                                             *
   4  *                                                                         *
   5  * Copyright (C) 2004-2006 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, 0x05, 0x5a);
  42         err += sn9c102_i2c_write(cam, 0x06, 0x88);
  43         err += sn9c102_i2c_write(cam, 0x07, 0x80);
  44         err += sn9c102_i2c_write(cam, 0x10, 0x06);
  45         err += sn9c102_i2c_write(cam, 0x11, 0x06);
  46         err += sn9c102_i2c_write(cam, 0x12, 0x00);
  47         err += sn9c102_i2c_write(cam, 0x14, 0x02);
  48         err += sn9c102_i2c_write(cam, 0x13, 0x01);
  49
  50         msleep(400);
  51
  52         return err;
  53 }
  54
  55
  56 static int pas106b_get_ctrl(struct sn9c102_device* cam,
  57                             struct v4l2_control* ctrl)
  58 {
  59         switch (ctrl->id) {
  60         case V4L2_CID_EXPOSURE:
  61                 {
  62                         int r1 = sn9c102_i2c_read(cam, 0x03),
  63                             r2 = sn9c102_i2c_read(cam, 0x04);
  64                         if (r1 < 0 || r2 < 0)
  65                                 return -EIO;
  66                         ctrl->value = (r1 << 4) | (r2 & 0x0f);
  67                 }
  68                 return 0;
  69         case V4L2_CID_RED_BALANCE:
  70                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0c)) < 0)
  71                         return -EIO;
  72                 ctrl->value &= 0x1f;
  73                 return 0;
  74         case V4L2_CID_BLUE_BALANCE:
  75                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x09)) < 0)
  76                         return -EIO;
  77                 ctrl->value &= 0x1f;
  78                 return 0;
  79         case V4L2_CID_GAIN:
  80                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0e)) < 0)
  81                         return -EIO;
  82                 ctrl->value &= 0x1f;
  83                 return 0;
  84         case V4L2_CID_CONTRAST:
  85                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0f)) < 0)
  86                         return -EIO;
  87                 ctrl->value &= 0x07;
  88                 return 0;
  89         case SN9C102_V4L2_CID_GREEN_BALANCE:
  90                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0a)) < 0)
  91                         return -EIO;
  92                 ctrl->value = (ctrl->value & 0x1f) << 1;
  93                 return 0;
  94         case SN9C102_V4L2_CID_DAC_MAGNITUDE:
  95                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x08)) < 0)
  96                         return -EIO;
  97                 ctrl->value &= 0xf8;
  98                 return 0;
  99         default:
 100                 return -EINVAL;
 101         }
 102 }
 103
 104
 105 static int pas106b_set_ctrl(struct sn9c102_device* cam,
 106                             const struct v4l2_control* ctrl)
 107 {
 108         int err = 0;
 109
 110         switch (ctrl->id) {
 111         case V4L2_CID_EXPOSURE:
 112                 err += sn9c102_i2c_write(cam, 0x03, ctrl->value >> 4);
 113                 err += sn9c102_i2c_write(cam, 0x04, ctrl->value & 0x0f);
 114                 break;
 115         case V4L2_CID_RED_BALANCE:
 116                 err += sn9c102_i2c_write(cam, 0x0c, ctrl->value);
 117                 break;
 118         case V4L2_CID_BLUE_BALANCE:
 119                 err += sn9c102_i2c_write(cam, 0x09, ctrl->value);
 120                 break;
 121         case V4L2_CID_GAIN:
 122                 err += sn9c102_i2c_write(cam, 0x0e, ctrl->value);
 123                 break;
 124         case V4L2_CID_CONTRAST:
 125                 err += sn9c102_i2c_write(cam, 0x0f, ctrl->value);
 126                 break;
 127         case SN9C102_V4L2_CID_GREEN_BALANCE:
 128                 err += sn9c102_i2c_write(cam, 0x0a, ctrl->value >> 1);
 129                 err += sn9c102_i2c_write(cam, 0x0b, ctrl->value >> 1);
 130                 break;
 131         case SN9C102_V4L2_CID_DAC_MAGNITUDE:
 132                 err += sn9c102_i2c_write(cam, 0x08, ctrl->value << 3);
 133                 break;
 134         default:
 135                 return -EINVAL;
 136         }
 137         err += sn9c102_i2c_write(cam, 0x13, 0x01);
 138
 139         return err ? -EIO : 0;
 140 }
 141
 142
 143 static int pas106b_set_crop(struct sn9c102_device* cam,
 144                             const struct v4l2_rect* rect)
 145 {
 146         struct sn9c102_sensor* s = &pas106b;
 147         int err = 0;
 148         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4,
 149            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
 150
 151         err += sn9c102_write_reg(cam, h_start, 0x12);
 152         err += sn9c102_write_reg(cam, v_start, 0x13);
 153
 154         return err;
 155 }
 156
 157
 158 static int pas106b_set_pix_format(struct sn9c102_device* cam,
 159                                   const struct v4l2_pix_format* pix)
 160 {
 161         int err = 0;
 162
 163         if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
 164                 err += sn9c102_write_reg(cam, 0x2c, 0x17);
 165         else
 166                 err += sn9c102_write_reg(cam, 0x20, 0x17);
 167
 168         return err;
 169 }
 170
 171
 172 static struct sn9c102_sensor pas106b = {
 173         .name = "PAS106B",
 174         .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
 175         .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
 176         .frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
 177         .interface = SN9C102_I2C_2WIRES,
 178         .i2c_slave_id = 0x40,
 179         .init = &pas106b_init,
 180         .qctrl = {
 181                 {
 182                         .id = V4L2_CID_EXPOSURE,
 183                         .type = V4L2_CTRL_TYPE_INTEGER,
 184                         .name = "exposure",
 185                         .minimum = 0x125,
 186                         .maximum = 0xfff,
 187                         .step = 0x001,
 188                         .default_value = 0x140,
 189                         .flags = 0,
 190                 },
 191                 {
 192                         .id = V4L2_CID_GAIN,
 193                         .type = V4L2_CTRL_TYPE_INTEGER,
 194                         .name = "global gain",
 195                         .minimum = 0x00,
 196                         .maximum = 0x1f,
 197                         .step = 0x01,
 198                         .default_value = 0x0d,
 199                         .flags = 0,
 200                 },
 201                 {
 202                         .id = V4L2_CID_CONTRAST,
 203                         .type = V4L2_CTRL_TYPE_INTEGER,
 204                         .name = "contrast",
 205                         .minimum = 0x00,
 206                         .maximum = 0x07,
 207                         .step = 0x01,
 208                         .default_value = 0x00, /* 0x00~0x03 have same effect */
 209                         .flags = 0,
 210                 },
 211                 {
 212                         .id = V4L2_CID_RED_BALANCE,
 213                         .type = V4L2_CTRL_TYPE_INTEGER,
 214                         .name = "red balance",
 215                         .minimum = 0x00,
 216                         .maximum = 0x1f,
 217                         .step = 0x01,
 218                         .default_value = 0x04,
 219                         .flags = 0,
 220                 },
 221                 {
 222                         .id = V4L2_CID_BLUE_BALANCE,
 223                         .type = V4L2_CTRL_TYPE_INTEGER,
 224                         .name = "blue balance",
 225                         .minimum = 0x00,
 226                         .maximum = 0x1f,
 227                         .step = 0x01,
 228                         .default_value = 0x06,
 229                         .flags = 0,
 230                 },
 231                 {
 232                         .id = SN9C102_V4L2_CID_GREEN_BALANCE,
 233                         .type = V4L2_CTRL_TYPE_INTEGER,
 234                         .name = "green balance",
 235                         .minimum = 0x00,
 236                         .maximum = 0x3e,
 237                         .step = 0x02,
 238                         .default_value = 0x02,
 239                         .flags = 0,
 240                 },
 241                 {
 242                         .id = SN9C102_V4L2_CID_DAC_MAGNITUDE,
 243                         .type = V4L2_CTRL_TYPE_INTEGER,
 244                         .name = "DAC magnitude",
 245                         .minimum = 0x00,
 246                         .maximum = 0x1f,
 247                         .step = 0x01,
 248                         .default_value = 0x01,
 249                         .flags = 0,
 250                 },
 251         },
 252         .get_ctrl = &pas106b_get_ctrl,
 253         .set_ctrl = &pas106b_set_ctrl,
 254         .cropcap = {
 255                 .bounds = {
 256                         .left = 0,
 257                         .top = 0,
 258                         .width = 352,
 259                         .height = 288,
 260                 },
 261                 .defrect = {
 262                         .left = 0,
 263                         .top = 0,
 264                         .width = 352,
 265                         .height = 288,
 266                 },
 267         },
 268         .set_crop = &pas106b_set_crop,
 269         .pix_format = {
 270                 .width = 352,
 271                 .height = 288,
 272                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 273                 .priv = 8, /* we use this field as 'bits per pixel' */
 274         },
 275         .set_pix_format = &pas106b_set_pix_format
 276 };
 277
 278
 279 int sn9c102_probe_pas106b(struct sn9c102_device* cam)
 280 {
 281         int r0 = 0, r1 = 0, err = 0;
 282         unsigned int pid = 0;
 283
 284         /*
 285            Minimal initialization to enable the I2C communication
 286            NOTE: do NOT change the values!
 287         */
 288         err += sn9c102_write_reg(cam, 0x01, 0x01); /* sensor power down */
 289         err += sn9c102_write_reg(cam, 0x00, 0x01); /* sensor power on */
 290         err += sn9c102_write_reg(cam, 0x28, 0x17); /* sensor clock at 24 MHz */
 291         if (err)
 292                 return -EIO;
 293
 294         r0 = sn9c102_i2c_try_read(cam, &pas106b, 0x00);
 295         r1 = sn9c102_i2c_try_read(cam, &pas106b, 0x01);
 296
 297         if (r0 < 0 || r1 < 0)
 298                 return -EIO;
 299
 300         pid = (r0 << 11) | ((r1 & 0xf0) >> 4);
 301         if (pid != 0x007)
 302                 return -ENODEV;
 303
 304         sn9c102_attach_sensor(cam, &pas106b);
 305
 306         return 0;
 307 }