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