LXR linux/drivers/media/usb/em28xx/em28xx-camera.c

   1/*
   2   em28xx-camera.c - driver for Empia EM25xx/27xx/28xx USB video capture devices
   3
   4   Copyright (C) 2009 Mauro Carvalho Chehab <mchehab@infradead.org>
   5   Copyright (C) 2013 Frank Schäfer <fschaefer.oss@googlemail.com>
   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 "em28xx.h"
  23
  24#include <linux/i2c.h>
  25#include <linux/usb.h>
  26#include <media/i2c/mt9v011.h>
  27#include <media/v4l2-common.h>
  28
  29/* Possible i2c addresses of Micron sensors */
  30static unsigned short micron_sensor_addrs[] = {
  31        0xb8 >> 1,   /* MT9V111, MT9V403 */
  32        0xba >> 1,   /* MT9M001/011/111/112, MT9V011/012/112, MT9D011 */
  33        0x90 >> 1,   /* MT9V012/112, MT9D011 (alternative address) */
  34        I2C_CLIENT_END
  35};
  36
  37/* Possible i2c addresses of Omnivision sensors */
  38static unsigned short omnivision_sensor_addrs[] = {
  39        0x42 >> 1,   /* OV7725, OV7670/60/48 */
  40        0x60 >> 1,   /* OV2640, OV9650/53/55 */
  41        I2C_CLIENT_END
  42};
  43
  44/* FIXME: Should be replaced by a proper mt9m111 driver */
  45static int em28xx_initialize_mt9m111(struct em28xx *dev)
  46{
  47        int i;
  48        unsigned char regs[][3] = {
  49                { 0x0d, 0x00, 0x01, },  /* reset and use defaults */
  50                { 0x0d, 0x00, 0x00, },
  51                { 0x0a, 0x00, 0x21, },
  52                { 0x21, 0x04, 0x00, },  /* full readout speed, no row/col skipping */
  53        };
  54
  55        for (i = 0; i < ARRAY_SIZE(regs); i++)
  56                i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
  57                                &regs[i][0], 3);
  58
  59        /* FIXME: This won't be creating a sensor at the media graph */
  60
  61        return 0;
  62}
  63
  64/* FIXME: Should be replaced by a proper mt9m001 driver */
  65static int em28xx_initialize_mt9m001(struct em28xx *dev)
  66{
  67        int i;
  68        unsigned char regs[][3] = {
  69                { 0x0d, 0x00, 0x01, },
  70                { 0x0d, 0x00, 0x00, },
  71                { 0x04, 0x05, 0x00, },  /* hres = 1280 */
  72                { 0x03, 0x04, 0x00, },  /* vres = 1024 */
  73                { 0x20, 0x11, 0x00, },
  74                { 0x06, 0x00, 0x10, },
  75                { 0x2b, 0x00, 0x24, },
  76                { 0x2e, 0x00, 0x24, },
  77                { 0x35, 0x00, 0x24, },
  78                { 0x2d, 0x00, 0x20, },
  79                { 0x2c, 0x00, 0x20, },
  80                { 0x09, 0x0a, 0xd4, },
  81                { 0x35, 0x00, 0x57, },
  82        };
  83
  84        for (i = 0; i < ARRAY_SIZE(regs); i++)
  85                i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
  86                                &regs[i][0], 3);
  87
  88        /* FIXME: This won't be creating a sensor at the media graph */
  89
  90        return 0;
  91}
  92
  93/*
  94 * Probes Micron sensors with 8 bit address and 16 bit register width
  95 */
  96static int em28xx_probe_sensor_micron(struct em28xx *dev)
  97{
  98        int ret, i;
  99        char *name;
 100        u16 id;
 101
 102        struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus];
 103
 104        dev->em28xx_sensor = EM28XX_NOSENSOR;
 105        for (i = 0; micron_sensor_addrs[i] != I2C_CLIENT_END; i++) {
 106                client->addr = micron_sensor_addrs[i];
 107                /* Read chip ID from register 0x00 */
 108                ret = i2c_smbus_read_word_data(client, 0x00); /* assumes LE */
 109                if (ret < 0) {
 110                        if (ret != -ENXIO)
 111                                dev_err(&dev->intf->dev,
 112                                        "couldn't read from i2c device 0x%02x: error %i\n",
 113                                       client->addr << 1, ret);
 114                        continue;
 115                }
 116                id = swab16(ret); /* LE -> BE */
 117                /* Read chip ID from register 0xff */
 118                ret = i2c_smbus_read_word_data(client, 0xff);
 119                if (ret < 0) {
 120                        dev_err(&dev->intf->dev,
 121                                "couldn't read from i2c device 0x%02x: error %i\n",
 122                                client->addr << 1, ret);
 123                        continue;
 124                }
 125                /* Validate chip ID to be sure we have a Micron device */
 126                if (id != swab16(ret))
 127                        continue;
 128                /* Check chip ID */
 129                switch (id) {
 130                case 0x1222:
 131                        name = "MT9V012"; /* MI370 */ /* 640x480 */
 132                        break;
 133                case 0x1229:
 134                        name = "MT9V112"; /* 640x480 */
 135                        break;
 136                case 0x1433:
 137                        name = "MT9M011"; /* 1280x1024 */
 138                        break;
 139                case 0x143a:    /* found in the ECS G200 */
 140                        name = "MT9M111"; /* MI1310 */ /* 1280x1024 */
 141                        dev->em28xx_sensor = EM28XX_MT9M111;
 142                        break;
 143                case 0x148c:
 144                        name = "MT9M112"; /* MI1320 */ /* 1280x1024 */
 145                        break;
 146                case 0x1511:
 147                        name = "MT9D011"; /* MI2010 */ /* 1600x1200 */
 148                        break;
 149                case 0x8232:
 150                case 0x8243:    /* rev B */
 151                        name = "MT9V011"; /* MI360 */ /* 640x480 */
 152                        dev->em28xx_sensor = EM28XX_MT9V011;
 153                        break;
 154                case 0x8431:
 155                        name = "MT9M001"; /* 1280x1024 */
 156                        dev->em28xx_sensor = EM28XX_MT9M001;
 157                        break;
 158                default:
 159                        dev_info(&dev->intf->dev,
 160                                 "unknown Micron sensor detected: 0x%04x\n", id);
 161                        return 0;
 162                }
 163
 164                if (dev->em28xx_sensor == EM28XX_NOSENSOR)
 165                        dev_info(&dev->intf->dev,
 166                                 "unsupported sensor detected: %s\n", name);
 167                else
 168                        dev_info(&dev->intf->dev,
 169                                 "sensor %s detected\n", name);
 170
 171                return 0;
 172        }
 173
 174        return -ENODEV;
 175}
 176
 177/*
 178 * Probes Omnivision sensors with 8 bit address and register width
 179 */
 180static int em28xx_probe_sensor_omnivision(struct em28xx *dev)
 181{
 182        int ret, i;
 183        char *name;
 184        u8 reg;
 185        u16 id;
 186        struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus];
 187
 188        dev->em28xx_sensor = EM28XX_NOSENSOR;
 189        /* NOTE: these devices have the register auto incrementation disabled
 190         * by default, so we have to use single byte reads !              */
 191        for (i = 0; omnivision_sensor_addrs[i] != I2C_CLIENT_END; i++) {
 192                client->addr = omnivision_sensor_addrs[i];
 193                /* Read manufacturer ID from registers 0x1c-0x1d (BE) */
 194                reg = 0x1c;
 195                ret = i2c_smbus_read_byte_data(client, reg);
 196                if (ret < 0) {
 197                        if (ret != -ENXIO)
 198                                dev_err(&dev->intf->dev,
 199                                        "couldn't read from i2c device 0x%02x: error %i\n",
 200                                        client->addr << 1, ret);
 201                        continue;
 202                }
 203                id = ret << 8;
 204                reg = 0x1d;
 205                ret = i2c_smbus_read_byte_data(client, reg);
 206                if (ret < 0) {
 207                        dev_err(&dev->intf->dev,
 208                                "couldn't read from i2c device 0x%02x: error %i\n",
 209                                client->addr << 1, ret);
 210                        continue;
 211                }
 212                id += ret;
 213                /* Check manufacturer ID */
 214                if (id != 0x7fa2)
 215                        continue;
 216                /* Read product ID from registers 0x0a-0x0b (BE) */
 217                reg = 0x0a;
 218                ret = i2c_smbus_read_byte_data(client, reg);
 219                if (ret < 0) {
 220                        dev_err(&dev->intf->dev,
 221                                "couldn't read from i2c device 0x%02x: error %i\n",
 222                                client->addr << 1, ret);
 223                        continue;
 224                }
 225                id = ret << 8;
 226                reg = 0x0b;
 227                ret = i2c_smbus_read_byte_data(client, reg);
 228                if (ret < 0) {
 229                        dev_err(&dev->intf->dev,
 230                                "couldn't read from i2c device 0x%02x: error %i\n",
 231                                client->addr << 1, ret);
 232                        continue;
 233                }
 234                id += ret;
 235                /* Check product ID */
 236                switch (id) {
 237                case 0x2642:
 238                        name = "OV2640";
 239                        dev->em28xx_sensor = EM28XX_OV2640;
 240                        break;
 241                case 0x7648:
 242                        name = "OV7648";
 243                        break;
 244                case 0x7660:
 245                        name = "OV7660";
 246                        break;
 247                case 0x7673:
 248                        name = "OV7670";
 249                        break;
 250                case 0x7720:
 251                        name = "OV7720";
 252                        break;
 253                case 0x7721:
 254                        name = "OV7725";
 255                        break;
 256                case 0x9648: /* Rev 2 */
 257                case 0x9649: /* Rev 3 */
 258                        name = "OV9640";
 259                        break;
 260                case 0x9650:
 261                case 0x9652: /* OV9653 */
 262                        name = "OV9650";
 263                        break;
 264                case 0x9656: /* Rev 4 */
 265                case 0x9657: /* Rev 5 */
 266                        name = "OV9655";
 267                        break;
 268                default:
 269                        dev_info(&dev->intf->dev,
 270                                 "unknown OmniVision sensor detected: 0x%04x\n",
 271                                id);
 272                        return 0;
 273                }
 274
 275                if (dev->em28xx_sensor == EM28XX_NOSENSOR)
 276                        dev_info(&dev->intf->dev,
 277                                 "unsupported sensor detected: %s\n", name);
 278                else
 279                        dev_info(&dev->intf->dev,
 280                                 "sensor %s detected\n", name);
 281
 282                return 0;
 283        }
 284
 285        return -ENODEV;
 286}
 287
 288int em28xx_detect_sensor(struct em28xx *dev)
 289{
 290        int ret;
 291
 292        ret = em28xx_probe_sensor_micron(dev);
 293
 294        if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0)
 295                ret = em28xx_probe_sensor_omnivision(dev);
 296
 297        /*
 298         * NOTE: the Windows driver also probes i2c addresses
 299         *       0x22 (Samsung ?) and 0x66 (Kodak ?)
 300         */
 301
 302        if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) {
 303                dev_info(&dev->intf->dev,
 304                         "No sensor detected\n");
 305                return -ENODEV;
 306        }
 307
 308        return 0;
 309}
 310
 311int em28xx_init_camera(struct em28xx *dev)
 312{
 313        struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus];
 314        struct i2c_adapter *adap = &dev->i2c_adap[dev->def_i2c_bus];
 315        struct em28xx_v4l2 *v4l2 = dev->v4l2;
 316
 317        switch (dev->em28xx_sensor) {
 318        case EM28XX_MT9V011:
 319        {
 320                struct mt9v011_platform_data pdata;
 321                struct i2c_board_info mt9v011_info = {
 322                        .type = "mt9v011",
 323                        .addr = client->addr,
 324                        .platform_data = &pdata,
 325                };
 326
 327                v4l2->sensor_xres = 640;
 328                v4l2->sensor_yres = 480;
 329
 330                /*
 331                 * FIXME: mt9v011 uses I2S speed as xtal clk - at least with
 332                 * the Silvercrest cam I have here for testing - for higher
 333                 * resolutions, a high clock cause horizontal artifacts, so we
 334                 * need to use a lower xclk frequency.
 335                 * Yet, it would be possible to adjust xclk depending on the
 336                 * desired resolution, since this affects directly the
 337                 * frame rate.
 338                 */
 339                dev->board.xclk = EM28XX_XCLK_FREQUENCY_4_3MHZ;
 340                em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
 341                v4l2->sensor_xtal = 4300000;
 342                pdata.xtal = v4l2->sensor_xtal;
 343                if (NULL ==
 344                    v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap,
 345                                              &mt9v011_info, NULL))
 346                        return -ENODEV;
 347                v4l2->vinmode = EM28XX_VINMODE_RGB8_GRBG;
 348                v4l2->vinctl = 0x00;
 349
 350                break;
 351        }
 352        case EM28XX_MT9M001:
 353                v4l2->sensor_xres = 1280;
 354                v4l2->sensor_yres = 1024;
 355
 356                em28xx_initialize_mt9m001(dev);
 357
 358                v4l2->vinmode = EM28XX_VINMODE_RGB8_BGGR;
 359                v4l2->vinctl = 0x00;
 360
 361                break;
 362        case EM28XX_MT9M111:
 363                v4l2->sensor_xres = 640;
 364                v4l2->sensor_yres = 512;
 365
 366                dev->board.xclk = EM28XX_XCLK_FREQUENCY_48MHZ;
 367                em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
 368                em28xx_initialize_mt9m111(dev);
 369
 370                v4l2->vinmode = EM28XX_VINMODE_YUV422_UYVY;
 371                v4l2->vinctl = 0x00;
 372
 373                break;
 374        case EM28XX_OV2640:
 375        {
 376                struct v4l2_subdev *subdev;
 377                struct i2c_board_info ov2640_info = {
 378                        .type = "ov2640",
 379                        .flags = I2C_CLIENT_SCCB,
 380                        .addr = client->addr,
 381                };
 382                struct v4l2_subdev_format format = {
 383                        .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 384                };
 385
 386                /*
 387                 * FIXME: sensor supports resolutions up to 1600x1200, but
 388                 * resolution setting/switching needs to be modified to
 389                 * - switch sensor output resolution (including further
 390                 *   configuration changes)
 391                 * - adjust bridge xclk
 392                 * - disable 16 bit (12 bit) output formats on high resolutions
 393                 */
 394                v4l2->sensor_xres = 640;
 395                v4l2->sensor_yres = 480;
 396
 397                subdev =
 398                     v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap,
 399                                               &ov2640_info, NULL);
 400                if (subdev == NULL)
 401                        return -ENODEV;
 402
 403                format.format.code = MEDIA_BUS_FMT_YUYV8_2X8;
 404                format.format.width = 640;
 405                format.format.height = 480;
 406                v4l2_subdev_call(subdev, pad, set_fmt, NULL, &format);
 407
 408                /* NOTE: for UXGA=1600x1200 switch to 12MHz */
 409                dev->board.xclk = EM28XX_XCLK_FREQUENCY_24MHZ;
 410                em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
 411                v4l2->vinmode = EM28XX_VINMODE_YUV422_YUYV;
 412                v4l2->vinctl = 0x00;
 413
 414                break;
 415        }
 416        case EM28XX_NOSENSOR:
 417        default:
 418                return -EINVAL;
 419        }
 420
 421        return 0;
 422}
 423EXPORT_SYMBOL_GPL(em28xx_init_camera);
 424