LXR linux/drivers/media/usb/sn9c102/sn9c102

   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
  31static 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
  81static 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
 124static 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
 138static 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
 172static 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
 199static 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
 297int 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}
 336