drivers/media/video/sn9c102/sn9c102_pas202bcb.c

   1 /***************************************************************************
   2  * Plug-in for PAS202BCB image sensor connected to the SN9C1xx PC Camera   *
   3  * Controllers                                                             *
   4  *                                                                         *
   5  * Copyright (C) 2004 by Carlos Eduardo Medaglia Dyonisio                  *
   6  *                       <medaglia@undl.org.br>                            *
   7  *                                                                         *
   8  * Support for SN9C103, DAC Magnitude, exposure and green gain controls    *
   9  * added by Luca Risolia <luca.risolia@studio.unibo.it>                    *
  10  *                                                                         *
  11  * This program is free software; you can redistribute it and/or modify    *
  12  * it under the terms of the GNU General Public License as published by    *
  13  * the Free Software Foundation; either version 2 of the License, or       *
  14  * (at your option) any later version.                                     *
  15  *                                                                         *
  16  * This program is distributed in the hope that it will be useful,         *
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
  19  * GNU General Public License for more details.                            *
  20  *                                                                         *
  21  * You should have received a copy of the GNU General Public License       *
  22  * along with this program; if not, write to the Free Software             *
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.               *
  24  ***************************************************************************/
  25
  26 #include <linux/delay.h>
  27 #include "sn9c102_sensor.h"
  28 #include "sn9c102_devtable.h"
  29
  30
  31 static int pas202bcb_init(struct sn9c102_device* cam)
  32 {
  33         int err = 0;
  34
  35         switch (sn9c102_get_bridge(cam)) {
  36         case BRIDGE_SN9C101:
  37         case BRIDGE_SN9C102:
  38                 err = sn9c102_write_const_regs(cam, {0x00, 0x10}, {0x00, 0x11},
  39                                                {0x00, 0x14}, {0x20, 0x17},
  40                                                {0x30, 0x19}, {0x09, 0x18});
  41                 break;
  42         case BRIDGE_SN9C103:
  43                 err = sn9c102_write_const_regs(cam, {0x00, 0x02}, {0x00, 0x03},
  44                                                {0x1a, 0x04}, {0x20, 0x05},
  45                                                {0x20, 0x06}, {0x20, 0x07},
  46                                                {0x00, 0x10}, {0x00, 0x11},
  47                                                {0x00, 0x14}, {0x20, 0x17},
  48                                                {0x30, 0x19}, {0x09, 0x18},
  49                                                {0x02, 0x1c}, {0x03, 0x1d},
  50                                                {0x0f, 0x1e}, {0x0c, 0x1f},
  51                                                {0x00, 0x20}, {0x10, 0x21},
  52                                                {0x20, 0x22}, {0x30, 0x23},
  53                                                {0x40, 0x24}, {0x50, 0x25},
  54                                                {0x60, 0x26}, {0x70, 0x27},
  55                                                {0x80, 0x28}, {0x90, 0x29},
  56                                                {0xa0, 0x2a}, {0xb0, 0x2b},
  57                                                {0xc0, 0x2c}, {0xd0, 0x2d},
  58                                                {0xe0, 0x2e}, {0xf0, 0x2f},
  59                                                {0xff, 0x30});
  60                 break;
  61         default:
  62                 break;
  63         }
  64
  65         err += sn9c102_i2c_write(cam, 0x02, 0x14);
  66         err += sn9c102_i2c_write(cam, 0x03, 0x40);
  67         err += sn9c102_i2c_write(cam, 0x0d, 0x2c);
  68         err += sn9c102_i2c_write(cam, 0x0e, 0x01);
  69         err += sn9c102_i2c_write(cam, 0x0f, 0xa9);
  70         err += sn9c102_i2c_write(cam, 0x10, 0x08);
  71         err += sn9c102_i2c_write(cam, 0x13, 0x63);
  72         err += sn9c102_i2c_write(cam, 0x15, 0x70);
  73         err += sn9c102_i2c_write(cam, 0x11, 0x01);
  74
  75         msleep(400);
  76
  77         return err;
  78 }
  79
  80
  81 static int pas202bcb_get_ctrl(struct sn9c102_device* cam,
  82                               struct v4l2_control* ctrl)
  83 {
  84         switch (ctrl->id) {
  85         case V4L2_CID_EXPOSURE:
  86                 {
  87                         int r1 = sn9c102_i2c_read(cam, 0x04),
  88                             r2 = sn9c102_i2c_read(cam, 0x05);
  89                         if (r1 < 0 || r2 < 0)
  90                                 return -EIO;
  91                         ctrl->value = (r1 << 6) | (r2 & 0x3f);
  92                 }
  93                 return 0;
  94         case V4L2_CID_RED_BALANCE:
  95                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x09)) < 0)
  96                         return -EIO;
  97                 ctrl->value &= 0x0f;
  98                 return 0;
  99         case V4L2_CID_BLUE_BALANCE:
 100                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x07)) < 0)
 101                         return -EIO;
 102                 ctrl->value &= 0x0f;
 103                 return 0;
 104         case V4L2_CID_GAIN:
 105                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x10)) < 0)
 106                         return -EIO;
 107                 ctrl->value &= 0x1f;
 108                 return 0;
 109         case SN9C102_V4L2_CID_GREEN_BALANCE:
 110                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x08)) < 0)
 111                         return -EIO;
 112                 ctrl->value &= 0x0f;
 113                 return 0;
 114         case SN9C102_V4L2_CID_DAC_MAGNITUDE:
 115                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0c)) < 0)
 116                         return -EIO;
 117                 return 0;
 118         default:
 119                 return -EINVAL;
 120         }
 121 }
 122
 123
 124 static int pas202bcb_set_pix_format(struct sn9c102_device* cam,
 125                                     const struct v4l2_pix_format* pix)
 126 {
 127         int err = 0;
 128
 129         if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
 130                 err += sn9c102_write_reg(cam, 0x28, 0x17);
 131         else
 132                 err += sn9c102_write_reg(cam, 0x20, 0x17);
 133
 134         return err;
 135 }
 136
 137
 138 static int pas202bcb_set_ctrl(struct sn9c102_device* cam,
 139                               const struct v4l2_control* ctrl)
 140 {
 141         int err = 0;
 142
 143         switch (ctrl->id) {
 144         case V4L2_CID_EXPOSURE:
 145                 err += sn9c102_i2c_write(cam, 0x04, ctrl->value >> 6);
 146                 err += sn9c102_i2c_write(cam, 0x05, ctrl->value & 0x3f);
 147                 break;
 148         case V4L2_CID_RED_BALANCE:
 149                 err += sn9c102_i2c_write(cam, 0x09, ctrl->value);
 150                 break;
 151         case V4L2_CID_BLUE_BALANCE:
 152                 err += sn9c102_i2c_write(cam, 0x07, ctrl->value);
 153                 break;
 154         case V4L2_CID_GAIN:
 155                 err += sn9c102_i2c_write(cam, 0x10, ctrl->value);
 156                 break;
 157         case SN9C102_V4L2_CID_GREEN_BALANCE:
 158                 err += sn9c102_i2c_write(cam, 0x08, ctrl->value);
 159                 break;
 160         case SN9C102_V4L2_CID_DAC_MAGNITUDE:
 161                 err += sn9c102_i2c_write(cam, 0x0c, ctrl->value);
 162                 break;
 163         default:
 164                 return -EINVAL;
 165         }
 166         err += sn9c102_i2c_write(cam, 0x11, 0x01);
 167
 168         return err ? -EIO : 0;
 169 }
 170
 171
 172 static int pas202bcb_set_crop(struct sn9c102_device* cam,
 173                               const struct v4l2_rect* rect)
 174 {
 175         struct sn9c102_sensor* s = sn9c102_get_sensor(cam);
 176         int err = 0;
 177         u8 h_start = 0,
 178            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
 179
 180         switch (sn9c102_get_bridge(cam)) {
 181         case BRIDGE_SN9C101:
 182         case BRIDGE_SN9C102:
 183                 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4;
 184                 break;
 185         case BRIDGE_SN9C103:
 186                 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 3;
 187                 break;
 188         default:
 189                 break;
 190         }
 191
 192         err += sn9c102_write_reg(cam, h_start, 0x12);
 193         err += sn9c102_write_reg(cam, v_start, 0x13);
 194
 195         return err;
 196 }
 197
 198
 199 static const struct sn9c102_sensor pas202bcb = {
 200         .name = "PAS202BCB",
 201         .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
 202         .supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102 | BRIDGE_SN9C103,
 203         .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
 204         .frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
 205         .interface = SN9C102_I2C_2WIRES,
 206         .i2c_slave_id = 0x40,
 207         .init = &pas202bcb_init,
 208         .qctrl = {
 209                 {
 210                         .id = V4L2_CID_EXPOSURE,
 211                         .type = V4L2_CTRL_TYPE_INTEGER,
 212                         .name = "exposure",
 213                         .minimum = 0x01e5,
 214                         .maximum = 0x3fff,
 215                         .step = 0x0001,
 216                         .default_value = 0x01e5,
 217                         .flags = 0,
 218                 },
 219                 {
 220                         .id = V4L2_CID_GAIN,
 221                         .type = V4L2_CTRL_TYPE_INTEGER,
 222                         .name = "global gain",
 223                         .minimum = 0x00,
 224                         .maximum = 0x1f,
 225                         .step = 0x01,
 226                         .default_value = 0x0b,
 227                         .flags = 0,
 228                 },
 229                 {
 230                         .id = V4L2_CID_RED_BALANCE,
 231                         .type = V4L2_CTRL_TYPE_INTEGER,
 232                         .name = "red balance",
 233                         .minimum = 0x00,
 234                         .maximum = 0x0f,
 235                         .step = 0x01,
 236                         .default_value = 0x00,
 237                         .flags = 0,
 238                 },
 239                 {
 240                         .id = V4L2_CID_BLUE_BALANCE,
 241                         .type = V4L2_CTRL_TYPE_INTEGER,
 242                         .name = "blue balance",
 243                         .minimum = 0x00,
 244                         .maximum = 0x0f,
 245                         .step = 0x01,
 246                         .default_value = 0x05,
 247                         .flags = 0,
 248                 },
 249                 {
 250                         .id = SN9C102_V4L2_CID_GREEN_BALANCE,
 251                         .type = V4L2_CTRL_TYPE_INTEGER,
 252                         .name = "green balance",
 253                         .minimum = 0x00,
 254                         .maximum = 0x0f,
 255                         .step = 0x01,
 256                         .default_value = 0x00,
 257                         .flags = 0,
 258                 },
 259                 {
 260                         .id = SN9C102_V4L2_CID_DAC_MAGNITUDE,
 261                         .type = V4L2_CTRL_TYPE_INTEGER,
 262                         .name = "DAC magnitude",
 263                         .minimum = 0x00,
 264                         .maximum = 0xff,
 265                         .step = 0x01,
 266                         .default_value = 0x04,
 267                         .flags = 0,
 268                 },
 269         },
 270         .get_ctrl = &pas202bcb_get_ctrl,
 271         .set_ctrl = &pas202bcb_set_ctrl,
 272         .cropcap = {
 273                 .bounds = {
 274                         .left = 0,
 275                         .top = 0,
 276                         .width = 640,
 277                         .height = 480,
 278                 },
 279                 .defrect = {
 280                         .left = 0,
 281                         .top = 0,
 282                         .width = 640,
 283                         .height = 480,
 284                 },
 285         },
 286         .set_crop = &pas202bcb_set_crop,
 287         .pix_format = {
 288                 .width = 640,
 289                 .height = 480,
 290                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 291                 .priv = 8,
 292         },
 293         .set_pix_format = &pas202bcb_set_pix_format
 294 };
 295
 296
 297 int sn9c102_probe_pas202bcb(struct sn9c102_device* cam)
 298 {
 299         int r0 = 0, r1 = 0, err = 0;
 300         unsigned int pid = 0;
 301
 302         /*
 303          *  Minimal initialization to enable the I2C communication
 304          *  NOTE: do NOT change the values!
 305          */
 306         switch (sn9c102_get_bridge(cam)) {
 307         case BRIDGE_SN9C101:
 308         case BRIDGE_SN9C102:
 309                 err = sn9c102_write_const_regs(cam,
 310                                                {0x01, 0x01}, /* power down */
 311                                                {0x40, 0x01}, /* power on */
 312                                                {0x28, 0x17});/* clock 24 MHz */
 313                 break;
 314         case BRIDGE_SN9C103: /* do _not_ change anything! */
 315                 err = sn9c102_write_const_regs(cam, {0x09, 0x01}, {0x44, 0x01},
 316                                                {0x44, 0x02}, {0x29, 0x17});
 317                 break;
 318         default:
 319                 break;
 320         }
 321
 322         r0 = sn9c102_i2c_try_read(cam, &pas202bcb, 0x00);
 323         r1 = sn9c102_i2c_try_read(cam, &pas202bcb, 0x01);
 324
 325         if (err || r0 < 0 || r1 < 0)
 326                 return -EIO;
 327
 328         pid = (r0 << 4) | ((r1 & 0xf0) >> 4);
 329         if (pid != 0x017)
 330                 return -ENODEV;
 331
 332         sn9c102_attach_sensor(cam, &pas202bcb);
 333
 334         return 0;
 335 }