git.oblomov.eu Git - linux-2.6/blob - 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 #include "sn9c102_devtable.h"
  25
  26
  27 static int pas106b_init(struct sn9c102_device* cam)
  28 {
  29         int err = 0;
  30
  31         err = sn9c102_write_const_regs(cam, {0x00, 0x10}, {0x00, 0x11},
  32                                        {0x00, 0x14}, {0x20, 0x17},
  33                                        {0x20, 0x19}, {0x09, 0x18});
  34
  35         err += sn9c102_i2c_write(cam, 0x02, 0x0c);
  36         err += sn9c102_i2c_write(cam, 0x05, 0x5a);
  37         err += sn9c102_i2c_write(cam, 0x06, 0x88);
  38         err += sn9c102_i2c_write(cam, 0x07, 0x80);
  39         err += sn9c102_i2c_write(cam, 0x10, 0x06);
  40         err += sn9c102_i2c_write(cam, 0x11, 0x06);
  41         err += sn9c102_i2c_write(cam, 0x12, 0x00);
  42         err += sn9c102_i2c_write(cam, 0x14, 0x02);
  43         err += sn9c102_i2c_write(cam, 0x13, 0x01);
  44
  45         msleep(400);
  46
  47         return err;
  48 }
  49
  50
  51 static int pas106b_get_ctrl(struct sn9c102_device* cam,
  52                             struct v4l2_control* ctrl)
  53 {
  54         switch (ctrl->id) {
  55         case V4L2_CID_EXPOSURE:
  56                 {
  57                         int r1 = sn9c102_i2c_read(cam, 0x03),
  58                             r2 = sn9c102_i2c_read(cam, 0x04);
  59                         if (r1 < 0 || r2 < 0)
  60                                 return -EIO;
  61                         ctrl->value = (r1 << 4) | (r2 & 0x0f);
  62                 }
  63                 return 0;
  64         case V4L2_CID_RED_BALANCE:
  65                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0c)) < 0)
  66                         return -EIO;
  67                 ctrl->value &= 0x1f;
  68                 return 0;
  69         case V4L2_CID_BLUE_BALANCE:
  70                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x09)) < 0)
  71                         return -EIO;
  72                 ctrl->value &= 0x1f;
  73                 return 0;
  74         case V4L2_CID_GAIN:
  75                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0e)) < 0)
  76                         return -EIO;
  77                 ctrl->value &= 0x1f;
  78                 return 0;
  79         case V4L2_CID_CONTRAST:
  80                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0f)) < 0)
  81                         return -EIO;
  82                 ctrl->value &= 0x07;
  83                 return 0;
  84         case SN9C102_V4L2_CID_GREEN_BALANCE:
  85                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0a)) < 0)
  86                         return -EIO;
  87                 ctrl->value = (ctrl->value & 0x1f) << 1;
  88                 return 0;
  89         case SN9C102_V4L2_CID_DAC_MAGNITUDE:
  90                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x08)) < 0)
  91                         return -EIO;
  92                 ctrl->value &= 0xf8;
  93                 return 0;
  94         default:
  95                 return -EINVAL;
  96         }
  97 }
  98
  99
 100 static int pas106b_set_ctrl(struct sn9c102_device* cam,
 101                             const struct v4l2_control* ctrl)
 102 {
 103         int err = 0;
 104
 105         switch (ctrl->id) {
 106         case V4L2_CID_EXPOSURE:
 107                 err += sn9c102_i2c_write(cam, 0x03, ctrl->value >> 4);
 108                 err += sn9c102_i2c_write(cam, 0x04, ctrl->value & 0x0f);
 109                 break;
 110         case V4L2_CID_RED_BALANCE:
 111                 err += sn9c102_i2c_write(cam, 0x0c, ctrl->value);
 112                 break;
 113         case V4L2_CID_BLUE_BALANCE:
 114                 err += sn9c102_i2c_write(cam, 0x09, ctrl->value);
 115                 break;
 116         case V4L2_CID_GAIN:
 117                 err += sn9c102_i2c_write(cam, 0x0e, ctrl->value);
 118                 break;
 119         case V4L2_CID_CONTRAST:
 120                 err += sn9c102_i2c_write(cam, 0x0f, ctrl->value);
 121                 break;
 122         case SN9C102_V4L2_CID_GREEN_BALANCE:
 123                 err += sn9c102_i2c_write(cam, 0x0a, ctrl->value >> 1);
 124                 err += sn9c102_i2c_write(cam, 0x0b, ctrl->value >> 1);
 125                 break;
 126         case SN9C102_V4L2_CID_DAC_MAGNITUDE:
 127                 err += sn9c102_i2c_write(cam, 0x08, ctrl->value << 3);
 128                 break;
 129         default:
 130                 return -EINVAL;
 131         }
 132         err += sn9c102_i2c_write(cam, 0x13, 0x01);
 133
 134         return err ? -EIO : 0;
 135 }
 136
 137
 138 static int pas106b_set_crop(struct sn9c102_device* cam,
 139                             const struct v4l2_rect* rect)
 140 {
 141         struct sn9c102_sensor* s = sn9c102_get_sensor(cam);
 142         int err = 0;
 143         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4,
 144            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
 145
 146         err += sn9c102_write_reg(cam, h_start, 0x12);
 147         err += sn9c102_write_reg(cam, v_start, 0x13);
 148
 149         return err;
 150 }
 151
 152
 153 static int pas106b_set_pix_format(struct sn9c102_device* cam,
 154                                   const struct v4l2_pix_format* pix)
 155 {
 156         int err = 0;
 157
 158         if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
 159                 err += sn9c102_write_reg(cam, 0x2c, 0x17);
 160         else
 161                 err += sn9c102_write_reg(cam, 0x20, 0x17);
 162
 163         return err;
 164 }
 165
 166
 167 static const struct sn9c102_sensor pas106b = {
 168         .name = "PAS106B",
 169         .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
 170         .supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102,
 171         .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
 172         .frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
 173         .interface = SN9C102_I2C_2WIRES,
 174         .i2c_slave_id = 0x40,
 175         .init = &pas106b_init,
 176         .qctrl = {
 177                 {
 178                         .id = V4L2_CID_EXPOSURE,
 179                         .type = V4L2_CTRL_TYPE_INTEGER,
 180                         .name = "exposure",
 181                         .minimum = 0x125,
 182                         .maximum = 0xfff,
 183                         .step = 0x001,
 184                         .default_value = 0x140,
 185                         .flags = 0,
 186                 },
 187                 {
 188                         .id = V4L2_CID_GAIN,
 189                         .type = V4L2_CTRL_TYPE_INTEGER,
 190                         .name = "global gain",
 191                         .minimum = 0x00,
 192                         .maximum = 0x1f,
 193                         .step = 0x01,
 194                         .default_value = 0x0d,
 195                         .flags = 0,
 196                 },
 197                 {
 198                         .id = V4L2_CID_CONTRAST,
 199                         .type = V4L2_CTRL_TYPE_INTEGER,
 200                         .name = "contrast",
 201                         .minimum = 0x00,
 202                         .maximum = 0x07,
 203                         .step = 0x01,
 204                         .default_value = 0x00, /* 0x00~0x03 have same effect */
 205                         .flags = 0,
 206                 },
 207                 {
 208                         .id = V4L2_CID_RED_BALANCE,
 209                         .type = V4L2_CTRL_TYPE_INTEGER,
 210                         .name = "red balance",
 211                         .minimum = 0x00,
 212                         .maximum = 0x1f,
 213                         .step = 0x01,
 214                         .default_value = 0x04,
 215                         .flags = 0,
 216                 },
 217                 {
 218                         .id = V4L2_CID_BLUE_BALANCE,
 219                         .type = V4L2_CTRL_TYPE_INTEGER,
 220                         .name = "blue balance",
 221                         .minimum = 0x00,
 222                         .maximum = 0x1f,
 223                         .step = 0x01,
 224                         .default_value = 0x06,
 225                         .flags = 0,
 226                 },
 227                 {
 228                         .id = SN9C102_V4L2_CID_GREEN_BALANCE,
 229                         .type = V4L2_CTRL_TYPE_INTEGER,
 230                         .name = "green balance",
 231                         .minimum = 0x00,
 232                         .maximum = 0x3e,
 233                         .step = 0x02,
 234                         .default_value = 0x02,
 235                         .flags = 0,
 236                 },
 237                 {
 238                         .id = SN9C102_V4L2_CID_DAC_MAGNITUDE,
 239                         .type = V4L2_CTRL_TYPE_INTEGER,
 240                         .name = "DAC magnitude",
 241                         .minimum = 0x00,
 242                         .maximum = 0x1f,
 243                         .step = 0x01,
 244                         .default_value = 0x01,
 245                         .flags = 0,
 246                 },
 247         },
 248         .get_ctrl = &pas106b_get_ctrl,
 249         .set_ctrl = &pas106b_set_ctrl,
 250         .cropcap = {
 251                 .bounds = {
 252                         .left = 0,
 253                         .top = 0,
 254                         .width = 352,
 255                         .height = 288,
 256                 },
 257                 .defrect = {
 258                         .left = 0,
 259                         .top = 0,
 260                         .width = 352,
 261                         .height = 288,
 262                 },
 263         },
 264         .set_crop = &pas106b_set_crop,
 265         .pix_format = {
 266                 .width = 352,
 267                 .height = 288,
 268                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 269                 .priv = 8, /* we use this field as 'bits per pixel' */
 270         },
 271         .set_pix_format = &pas106b_set_pix_format
 272 };
 273
 274
 275 int sn9c102_probe_pas106b(struct sn9c102_device* cam)
 276 {
 277         int r0 = 0, r1 = 0;
 278         unsigned int pid = 0;
 279
 280         /*
 281            Minimal initialization to enable the I2C communication
 282            NOTE: do NOT change the values!
 283         */
 284         if (sn9c102_write_const_regs(cam,
 285                                      {0x01, 0x01}, /* sensor power down */
 286                                      {0x00, 0x01}, /* sensor power on */
 287                                     {0x28, 0x17})) /* sensor clock at 24 MHz */
 288                 return -EIO;
 289
 290         r0 = sn9c102_i2c_try_read(cam, &pas106b, 0x00);
 291         r1 = sn9c102_i2c_try_read(cam, &pas106b, 0x01);
 292         if (r0 < 0 || r1 < 0)
 293                 return -EIO;
 294
 295         pid = (r0 << 11) | ((r1 & 0xf0) >> 4);
 296         if (pid != 0x007)
 297                 return -ENODEV;
 298
 299         sn9c102_attach_sensor(cam, &pas106b);
 300
 301         return 0;
 302 }