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 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         case SN9C102_V4L2_CID_DAC_SIGN:
 100                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x07)) < 0)
 101                         return -EIO;
 102                 ctrl->value &= 0x01;
 103                 return 0;
 104         default:
 105                 return -EINVAL;
 106         }
 107 }
 108
 109
 110 static int pas106b_set_ctrl(struct sn9c102_device* cam,
 111                             const struct v4l2_control* ctrl)
 112 {
 113         int err = 0;
 114
 115         switch (ctrl->id) {
 116         case V4L2_CID_EXPOSURE:
 117                 err += sn9c102_i2c_write(cam, 0x03, ctrl->value >> 4);
 118                 err += sn9c102_i2c_write(cam, 0x04, ctrl->value & 0x0f);
 119                 break;
 120         case V4L2_CID_RED_BALANCE:
 121                 err += sn9c102_i2c_write(cam, 0x0c, ctrl->value);
 122                 break;
 123         case V4L2_CID_BLUE_BALANCE:
 124                 err += sn9c102_i2c_write(cam, 0x09, ctrl->value);
 125                 break;
 126         case V4L2_CID_GAIN:
 127                 err += sn9c102_i2c_write(cam, 0x0e, ctrl->value);
 128                 break;
 129         case V4L2_CID_CONTRAST:
 130                 err += sn9c102_i2c_write(cam, 0x0f, ctrl->value);
 131                 break;
 132         case SN9C102_V4L2_CID_GREEN_BALANCE:
 133                 err += sn9c102_i2c_write(cam, 0x0a, ctrl->value >> 1);
 134                 err += sn9c102_i2c_write(cam, 0x0b, ctrl->value >> 1);
 135                 break;
 136         case SN9C102_V4L2_CID_DAC_MAGNITUDE:
 137                 err += sn9c102_i2c_write(cam, 0x08, ctrl->value << 3);
 138                 break;
 139         case SN9C102_V4L2_CID_DAC_SIGN:
 140                 {
 141                         int r;
 142                         err += (r = sn9c102_i2c_read(cam, 0x07)) < 0 ? r : 0;
 143                         err += sn9c102_i2c_write(cam, 0x07, r | ctrl->value);
 144                 }
 145                 break;
 146         default:
 147                 return -EINVAL;
 148         }
 149         err += sn9c102_i2c_write(cam, 0x13, 0x01);
 150
 151         return err ? -EIO : 0;
 152 }
 153
 154
 155 static int pas106b_set_crop(struct sn9c102_device* cam,
 156                             const struct v4l2_rect* rect)
 157 {
 158         struct sn9c102_sensor* s = &pas106b;
 159         int err = 0;
 160         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4,
 161            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
 162
 163         err += sn9c102_write_reg(cam, h_start, 0x12);
 164         err += sn9c102_write_reg(cam, v_start, 0x13);
 165
 166         return err;
 167 }
 168
 169
 170 static struct sn9c102_sensor pas106b = {
 171         .name = "PAS106B",
 172         .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
 173         .frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
 174         .interface = SN9C102_I2C_2WIRES,
 175         .slave_read_id = 0x40,
 176         .slave_write_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 = 0x01,
 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                         .id = SN9C102_V4L2_CID_DAC_SIGN,
 251                         .type = V4L2_CTRL_TYPE_BOOLEAN,
 252                         .name = "DAC sign",
 253                         .minimum = 0x00,
 254                         .maximum = 0x01,
 255                         .step = 0x01,
 256                         .default_value = 0x00,
 257                         .flags = 0,
 258                 },
 259         },
 260         .get_ctrl = &pas106b_get_ctrl,
 261         .set_ctrl = &pas106b_set_ctrl,
 262         .cropcap = {
 263                 .bounds = {
 264                         .left = 0,
 265                         .top = 0,
 266                         .width = 352,
 267                         .height = 288,
 268                 },
 269                 .defrect = {
 270                         .left = 0,
 271                         .top = 0,
 272                         .width = 352,
 273                         .height = 288,
 274                 },
 275         },
 276         .set_crop = &pas106b_set_crop,
 277         .pix_format = {
 278                 .width = 352,
 279                 .height = 288,
 280                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 281                 .priv = 8, /* we use this field as 'bits per pixel' */
 282         }
 283 };
 284
 285
 286 int sn9c102_probe_pas106b(struct sn9c102_device* cam)
 287 {
 288         int r0 = 0, r1 = 0, err = 0;
 289         unsigned int pid = 0;
 290
 291         /*
 292            Minimal initialization to enable the I2C communication
 293            NOTE: do NOT change the values!
 294         */
 295         err += sn9c102_write_reg(cam, 0x01, 0x01); /* sensor power down */
 296         err += sn9c102_write_reg(cam, 0x00, 0x01); /* sensor power on */
 297         err += sn9c102_write_reg(cam, 0x28, 0x17); /* sensor clock at 24 MHz */
 298         if (err)
 299                 return -EIO;
 300
 301         r0 = sn9c102_i2c_try_read(cam, &pas106b, 0x00);
 302         r1 = sn9c102_i2c_try_read(cam, &pas106b, 0x01);
 303
 304         if (r0 < 0 || r1 < 0)
 305                 return -EIO;
 306
 307         pid = (r0 << 11) | ((r1 & 0xf0) >> 4);
 308         if (pid != 0x007)
 309                 return -ENODEV;
 310
 311         sn9c102_attach_sensor(cam, &pas106b);
 312
 313         return 0;
 314 }