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  *                       http://cadu.homelinux.com:8080/                   *
   8  *                                                                         *
   9  * Support for SN9C103, DAC Magnitude, exposure and green gain controls    *
  10  * added by Luca Risolia <luca.risolia@studio.unibo.it>                    *
  11  *                                                                         *
  12  * This program is free software; you can redistribute it and/or modify    *
  13  * it under the terms of the GNU General Public License as published by    *
  14  * the Free Software Foundation; either version 2 of the License, or       *
  15  * (at your option) any later version.                                     *
  16  *                                                                         *
  17  * This program is distributed in the hope that it will be useful,         *
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
  20  * GNU General Public License for more details.                            *
  21  *                                                                         *
  22  * You should have received a copy of the GNU General Public License       *
  23  * along with this program; if not, write to the Free Software             *
  24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.               *
  25  ***************************************************************************/
  26
  27 #include <linux/delay.h>
  28 #include "sn9c102_sensor.h"
  29 #include "sn9c102_devtable.h"
  30
  31
  32 static int pas202bcb_init(struct sn9c102_device* cam)
  33 {
  34         int err = 0;
  35
  36         switch (sn9c102_get_bridge(cam)) {
  37         case BRIDGE_SN9C101:
  38         case BRIDGE_SN9C102:
  39                 err = sn9c102_write_const_regs(cam, {0x00, 0x10}, {0x00, 0x11},
  40                                                {0x00, 0x14}, {0x20, 0x17},
  41                                                {0x30, 0x19}, {0x09, 0x18});
  42                 break;
  43         case BRIDGE_SN9C103:
  44                 err = sn9c102_write_const_regs(cam, {0x00, 0x02}, {0x00, 0x03},
  45                                                {0x1a, 0x04}, {0x20, 0x05},
  46                                                {0x20, 0x06}, {0x20, 0x07},
  47                                                {0x00, 0x10}, {0x00, 0x11},
  48                                                {0x00, 0x14}, {0x20, 0x17},
  49                                                {0x30, 0x19}, {0x09, 0x18},
  50                                                {0x02, 0x1c}, {0x03, 0x1d},
  51                                                {0x0f, 0x1e}, {0x0c, 0x1f},
  52                                                {0x00, 0x20}, {0x10, 0x21},
  53                                                {0x20, 0x22}, {0x30, 0x23},
  54                                                {0x40, 0x24}, {0x50, 0x25},
  55                                                {0x60, 0x26}, {0x70, 0x27},
  56                                                {0x80, 0x28}, {0x90, 0x29},
  57                                                {0xa0, 0x2a}, {0xb0, 0x2b},
  58                                                {0xc0, 0x2c}, {0xd0, 0x2d},
  59                                                {0xe0, 0x2e}, {0xf0, 0x2f},
  60                                                {0xff, 0x30});
  61                 break;
  62         default:
  63                 break;
  64         }
  65
  66         err += sn9c102_i2c_write(cam, 0x02, 0x14);
  67         err += sn9c102_i2c_write(cam, 0x03, 0x40);
  68         err += sn9c102_i2c_write(cam, 0x0d, 0x2c);
  69         err += sn9c102_i2c_write(cam, 0x0e, 0x01);
  70         err += sn9c102_i2c_write(cam, 0x0f, 0xa9);
  71         err += sn9c102_i2c_write(cam, 0x10, 0x08);
  72         err += sn9c102_i2c_write(cam, 0x13, 0x63);
  73         err += sn9c102_i2c_write(cam, 0x15, 0x70);
  74         err += sn9c102_i2c_write(cam, 0x11, 0x01);
  75
  76         msleep(400);
  77
  78         return err;
  79 }
  80
  81
  82 static int pas202bcb_get_ctrl(struct sn9c102_device* cam,
  83                               struct v4l2_control* ctrl)
  84 {
  85         switch (ctrl->id) {
  86         case V4L2_CID_EXPOSURE:
  87                 {
  88                         int r1 = sn9c102_i2c_read(cam, 0x04),
  89                             r2 = sn9c102_i2c_read(cam, 0x05);
  90                         if (r1 < 0 || r2 < 0)
  91                                 return -EIO;
  92                         ctrl->value = (r1 << 6) | (r2 & 0x3f);
  93                 }
  94                 return 0;
  95         case V4L2_CID_RED_BALANCE:
  96                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x09)) < 0)
  97                         return -EIO;
  98                 ctrl->value &= 0x0f;
  99                 return 0;
 100         case V4L2_CID_BLUE_BALANCE:
 101                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x07)) < 0)
 102                         return -EIO;
 103                 ctrl->value &= 0x0f;
 104                 return 0;
 105         case V4L2_CID_GAIN:
 106                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x10)) < 0)
 107                         return -EIO;
 108                 ctrl->value &= 0x1f;
 109                 return 0;
 110         case SN9C102_V4L2_CID_GREEN_BALANCE:
 111                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x08)) < 0)
 112                         return -EIO;
 113                 ctrl->value &= 0x0f;
 114                 return 0;
 115         case SN9C102_V4L2_CID_DAC_MAGNITUDE:
 116                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0c)) < 0)
 117                         return -EIO;
 118                 return 0;
 119         default:
 120                 return -EINVAL;
 121         }
 122 }
 123
 124
 125 static int pas202bcb_set_pix_format(struct sn9c102_device* cam,
 126                                     const struct v4l2_pix_format* pix)
 127 {
 128         int err = 0;
 129
 130         if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
 131                 err += sn9c102_write_reg(cam, 0x28, 0x17);
 132         else
 133                 err += sn9c102_write_reg(cam, 0x20, 0x17);
 134
 135         return err;
 136 }
 137
 138
 139 static int pas202bcb_set_ctrl(struct sn9c102_device* cam,
 140                               const struct v4l2_control* ctrl)
 141 {
 142         int err = 0;
 143
 144         switch (ctrl->id) {
 145         case V4L2_CID_EXPOSURE:
 146                 err += sn9c102_i2c_write(cam, 0x04, ctrl->value >> 6);
 147                 err += sn9c102_i2c_write(cam, 0x05, ctrl->value & 0x3f);
 148                 break;
 149         case V4L2_CID_RED_BALANCE:
 150                 err += sn9c102_i2c_write(cam, 0x09, ctrl->value);
 151                 break;
 152         case V4L2_CID_BLUE_BALANCE:
 153                 err += sn9c102_i2c_write(cam, 0x07, ctrl->value);
 154                 break;
 155         case V4L2_CID_GAIN:
 156                 err += sn9c102_i2c_write(cam, 0x10, ctrl->value);
 157                 break;
 158         case SN9C102_V4L2_CID_GREEN_BALANCE:
 159                 err += sn9c102_i2c_write(cam, 0x08, ctrl->value);
 160                 break;
 161         case SN9C102_V4L2_CID_DAC_MAGNITUDE:
 162                 err += sn9c102_i2c_write(cam, 0x0c, ctrl->value);
 163                 break;
 164         default:
 165                 return -EINVAL;
 166         }
 167         err += sn9c102_i2c_write(cam, 0x11, 0x01);
 168
 169         return err ? -EIO : 0;
 170 }
 171
 172
 173 static int pas202bcb_set_crop(struct sn9c102_device* cam,
 174                               const struct v4l2_rect* rect)
 175 {
 176         struct sn9c102_sensor* s = sn9c102_get_sensor(cam);
 177         int err = 0;
 178         u8 h_start = 0,
 179            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
 180
 181         switch (sn9c102_get_bridge(cam)) {
 182         case BRIDGE_SN9C101:
 183         case BRIDGE_SN9C102:
 184                 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4;
 185                 break;
 186         case BRIDGE_SN9C103:
 187                 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 3;
 188                 break;
 189         default:
 190                 break;
 191         }
 192
 193         err += sn9c102_write_reg(cam, h_start, 0x12);
 194         err += sn9c102_write_reg(cam, v_start, 0x13);
 195
 196         return err;
 197 }
 198
 199
 200 static const struct sn9c102_sensor pas202bcb = {
 201         .name = "PAS202BCB",
 202         .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
 203         .supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102 | BRIDGE_SN9C103,
 204         .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
 205         .frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
 206         .interface = SN9C102_I2C_2WIRES,
 207         .i2c_slave_id = 0x40,
 208         .init = &pas202bcb_init,
 209         .qctrl = {
 210                 {
 211                         .id = V4L2_CID_EXPOSURE,
 212                         .type = V4L2_CTRL_TYPE_INTEGER,
 213                         .name = "exposure",
 214                         .minimum = 0x01e5,
 215                         .maximum = 0x3fff,
 216                         .step = 0x0001,
 217                         .default_value = 0x01e5,
 218                         .flags = 0,
 219                 },
 220                 {
 221                         .id = V4L2_CID_GAIN,
 222                         .type = V4L2_CTRL_TYPE_INTEGER,
 223                         .name = "global gain",
 224                         .minimum = 0x00,
 225                         .maximum = 0x1f,
 226                         .step = 0x01,
 227                         .default_value = 0x0b,
 228                         .flags = 0,
 229                 },
 230                 {
 231                         .id = V4L2_CID_RED_BALANCE,
 232                         .type = V4L2_CTRL_TYPE_INTEGER,
 233                         .name = "red balance",
 234                         .minimum = 0x00,
 235                         .maximum = 0x0f,
 236                         .step = 0x01,
 237                         .default_value = 0x00,
 238                         .flags = 0,
 239                 },
 240                 {
 241                         .id = V4L2_CID_BLUE_BALANCE,
 242                         .type = V4L2_CTRL_TYPE_INTEGER,
 243                         .name = "blue balance",
 244                         .minimum = 0x00,
 245                         .maximum = 0x0f,
 246                         .step = 0x01,
 247                         .default_value = 0x05,
 248                         .flags = 0,
 249                 },
 250                 {
 251                         .id = SN9C102_V4L2_CID_GREEN_BALANCE,
 252                         .type = V4L2_CTRL_TYPE_INTEGER,
 253                         .name = "green balance",
 254                         .minimum = 0x00,
 255                         .maximum = 0x0f,
 256                         .step = 0x01,
 257                         .default_value = 0x00,
 258                         .flags = 0,
 259                 },
 260                 {
 261                         .id = SN9C102_V4L2_CID_DAC_MAGNITUDE,
 262                         .type = V4L2_CTRL_TYPE_INTEGER,
 263                         .name = "DAC magnitude",
 264                         .minimum = 0x00,
 265                         .maximum = 0xff,
 266                         .step = 0x01,
 267                         .default_value = 0x04,
 268                         .flags = 0,
 269                 },
 270         },
 271         .get_ctrl = &pas202bcb_get_ctrl,
 272         .set_ctrl = &pas202bcb_set_ctrl,
 273         .cropcap = {
 274                 .bounds = {
 275                         .left = 0,
 276                         .top = 0,
 277                         .width = 640,
 278                         .height = 480,
 279                 },
 280                 .defrect = {
 281                         .left = 0,
 282                         .top = 0,
 283                         .width = 640,
 284                         .height = 480,
 285                 },
 286         },
 287         .set_crop = &pas202bcb_set_crop,
 288         .pix_format = {
 289                 .width = 640,
 290                 .height = 480,
 291                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 292                 .priv = 8,
 293         },
 294         .set_pix_format = &pas202bcb_set_pix_format
 295 };
 296
 297
 298 int sn9c102_probe_pas202bcb(struct sn9c102_device* cam)
 299 {
 300         int r0 = 0, r1 = 0, err = 0;
 301         unsigned int pid = 0;
 302
 303         /*
 304          *  Minimal initialization to enable the I2C communication
 305          *  NOTE: do NOT change the values!
 306          */
 307         switch (sn9c102_get_bridge(cam)) {
 308         case BRIDGE_SN9C101:
 309         case BRIDGE_SN9C102:
 310                 err = sn9c102_write_const_regs(cam,
 311                                                {0x01, 0x01}, /* power down */
 312                                                {0x40, 0x01}, /* power on */
 313                                                {0x28, 0x17});/* clock 24 MHz */
 314                 break;
 315         case BRIDGE_SN9C103: /* do _not_ change anything! */
 316                 err = sn9c102_write_const_regs(cam, {0x09, 0x01}, {0x44, 0x01},
 317                                                {0x44, 0x02}, {0x29, 0x17});
 318                 break;
 319         default:
 320                 break;
 321         }
 322
 323         r0 = sn9c102_i2c_try_read(cam, &pas202bcb, 0x00);
 324         r1 = sn9c102_i2c_try_read(cam, &pas202bcb, 0x01);
 325
 326         if (err || r0 < 0 || r1 < 0)
 327                 return -EIO;
 328
 329         pid = (r0 << 4) | ((r1 & 0xf0) >> 4);
 330         if (pid != 0x017)
 331                 return -ENODEV;
 332
 333         sn9c102_attach_sensor(cam, &pas202bcb);
 334
 335         return 0;
 336 }