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 <linux/i2c.h>
  23#include <media/soc_camera.h>
  24#include <media/i2c/mt9v011.h>
  25#include <media/v4l2-clk.h>
  26#include <media/v4l2-common.h>
  27
  28#include "em28xx.h"
  29
  30/* Possible i2c addresses of Micron sensors */
  31static unsigned short micron_sensor_addrs[] = {
  32        0xb8 >> 1,   /* MT9V111, MT9V403 */
  33        0xba >> 1,   /* MT9M001/011/111/112, MT9V011/012/112, MT9D011 */
  34        0x90 >> 1,   /* MT9V012/112, MT9D011 (alternative address) */
  35        I2C_CLIENT_END
  36};
  37
  38/* Possible i2c addresses of Omnivision sensors */
  39static unsigned short omnivision_sensor_addrs[] = {
  40        0x42 >> 1,   /* OV7725, OV7670/60/48 */
  41        0x60 >> 1,   /* OV2640, OV9650/53/55 */
  42        I2C_CLIENT_END
  43};
  44
  45static struct soc_camera_link camlink = {
  46        .bus_id = 0,
  47        .flags = 0,
  48        .module_name = "em28xx",
  49        .unbalanced_power = true,
  50};
  51
  52/* FIXME: Should be replaced by a proper mt9m111 driver */
  53static int em28xx_initialize_mt9m111(struct em28xx *dev)
  54{
  55        int i;
  56        unsigned char regs[][3] = {
  57                { 0x0d, 0x00, 0x01, },  /* reset and use defaults */
  58                { 0x0d, 0x00, 0x00, },
  59                { 0x0a, 0x00, 0x21, },
  60                { 0x21, 0x04, 0x00, },  /* full readout speed, no row/col skipping */
  61        };
  62
  63        for (i = 0; i < ARRAY_SIZE(regs); i++)
  64                i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
  65                                &regs[i][0], 3);
  66
  67        /* FIXME: This won't be creating a sensor at the media graph */
  68
  69        return 0;
  70}
  71
  72/* FIXME: Should be replaced by a proper mt9m001 driver */
  73static int em28xx_initialize_mt9m001(struct em28xx *dev)
  74{
  75        int i;
  76        unsigned char regs[][3] = {
  77                { 0x0d, 0x00, 0x01, },
  78                { 0x0d, 0x00, 0x00, },
  79                { 0x04, 0x05, 0x00, },  /* hres = 1280 */
  80                { 0x03, 0x04, 0x00, },  /* vres = 1024 */
  81                { 0x20, 0x11, 0x00, },
  82                { 0x06, 0x00, 0x10, },
  83                { 0x2b, 0x00, 0x24, },
  84                { 0x2e, 0x00, 0x24, },
  85                { 0x35, 0x00, 0x24, },
  86                { 0x2d, 0x00, 0x20, },
  87                { 0x2c, 0x00, 0x20, },
  88                { 0x09, 0x0a, 0xd4, },
  89                { 0x35, 0x00, 0x57, },
  90        };
  91
  92        for (i = 0; i < ARRAY_SIZE(regs); i++)
  93                i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
  94                                &regs[i][0], 3);
  95
  96        /* FIXME: This won't be creating a sensor at the media graph */
  97
  98        return 0;
  99}
 100
 101/*
 102 * Probes Micron sensors with 8 bit address and 16 bit register width
 103 */
 104static int em28xx_probe_sensor_micron(struct em28xx *dev)
 105{
 106        int ret, i;
 107        char *name;
 108        u8 reg;
 109        __be16 id_be;
 110        u16 id;
 111
 112        struct i2c_client client = dev->i2c_client[dev->def_i2c_bus];
 113
 114        dev->em28xx_sensor = EM28XX_NOSENSOR;
 115        for (i = 0; micron_sensor_addrs[i] != I2C_CLIENT_END; i++) {
 116                client.addr = micron_sensor_addrs[i];
 117                /* NOTE: i2c_smbus_read_word_data() doesn't work with BE data */
 118                /* Read chip ID from register 0x00 */
 119                reg = 0x00;
 120                ret = i2c_master_send(&client, &reg, 1);
 121                if (ret < 0) {
 122                        if (ret != -ENXIO)
 123                                em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 124                                              client.addr << 1, ret);
 125                        continue;
 126                }
 127                ret = i2c_master_recv(&client, (u8 *)&id_be, 2);
 128                if (ret < 0) {
 129                        em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 130                                      client.addr << 1, ret);
 131                        continue;
 132                }
 133                id = be16_to_cpu(id_be);
 134                /* Read chip ID from register 0xff */
 135                reg = 0xff;
 136                ret = i2c_master_send(&client, &reg, 1);
 137                if (ret < 0) {
 138                        em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 139                                      client.addr << 1, ret);
 140                        continue;
 141                }
 142                ret = i2c_master_recv(&client, (u8 *)&id_be, 2);
 143                if (ret < 0) {
 144                        em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 145                                      client.addr << 1, ret);
 146                        continue;
 147                }
 148                /* Validate chip ID to be sure we have a Micron device */
 149                if (id != be16_to_cpu(id_be))
 150                        continue;
 151                /* Check chip ID */
 152                id = be16_to_cpu(id_be);
 153                switch (id) {
 154                case 0x1222:
 155                        name = "MT9V012"; /* MI370 */ /* 640x480 */
 156                        break;
 157                case 0x1229:
 158                        name = "MT9V112"; /* 640x480 */
 159                        break;
 160                case 0x1433:
 161                        name = "MT9M011"; /* 1280x1024 */
 162                        break;
 163                case 0x143a:    /* found in the ECS G200 */
 164                        name = "MT9M111"; /* MI1310 */ /* 1280x1024 */
 165                        dev->em28xx_sensor = EM28XX_MT9M111;
 166                        break;
 167                case 0x148c:
 168                        name = "MT9M112"; /* MI1320 */ /* 1280x1024 */
 169                        break;
 170                case 0x1511:
 171                        name = "MT9D011"; /* MI2010 */ /* 1600x1200 */
 172                        break;
 173                case 0x8232:
 174                case 0x8243:    /* rev B */
 175                        name = "MT9V011"; /* MI360 */ /* 640x480 */
 176                        dev->em28xx_sensor = EM28XX_MT9V011;
 177                        break;
 178                case 0x8431:
 179                        name = "MT9M001"; /* 1280x1024 */
 180                        dev->em28xx_sensor = EM28XX_MT9M001;
 181                        break;
 182                default:
 183                        em28xx_info("unknown Micron sensor detected: 0x%04x\n",
 184                                    id);
 185                        return 0;
 186                }
 187
 188                if (dev->em28xx_sensor == EM28XX_NOSENSOR)
 189                        em28xx_info("unsupported sensor detected: %s\n", name);
 190                else
 191                        em28xx_info("sensor %s detected\n", name);
 192
 193                dev->i2c_client[dev->def_i2c_bus].addr = client.addr;
 194                return 0;
 195        }
 196
 197        return -ENODEV;
 198}
 199
 200/*
 201 * Probes Omnivision sensors with 8 bit address and register width
 202 */
 203static int em28xx_probe_sensor_omnivision(struct em28xx *dev)
 204{
 205        int ret, i;
 206        char *name;
 207        u8 reg;
 208        u16 id;
 209        struct i2c_client client = dev->i2c_client[dev->def_i2c_bus];
 210
 211        dev->em28xx_sensor = EM28XX_NOSENSOR;
 212        /* NOTE: these devices have the register auto incrementation disabled
 213         * by default, so we have to use single byte reads !              */
 214        for (i = 0; omnivision_sensor_addrs[i] != I2C_CLIENT_END; i++) {
 215                client.addr = omnivision_sensor_addrs[i];
 216                /* Read manufacturer ID from registers 0x1c-0x1d (BE) */
 217                reg = 0x1c;
 218                ret = i2c_smbus_read_byte_data(&client, reg);
 219                if (ret < 0) {
 220                        if (ret != -ENXIO)
 221                                em28xx_errdev("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 = 0x1d;
 227                ret = i2c_smbus_read_byte_data(&client, reg);
 228                if (ret < 0) {
 229                        em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 230                                      client.addr << 1, ret);
 231                        continue;
 232                }
 233                id += ret;
 234                /* Check manufacturer ID */
 235                if (id != 0x7fa2)
 236                        continue;
 237                /* Read product ID from registers 0x0a-0x0b (BE) */
 238                reg = 0x0a;
 239                ret = i2c_smbus_read_byte_data(&client, reg);
 240                if (ret < 0) {
 241                        em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 242                                      client.addr << 1, ret);
 243                        continue;
 244                }
 245                id = ret << 8;
 246                reg = 0x0b;
 247                ret = i2c_smbus_read_byte_data(&client, reg);
 248                if (ret < 0) {
 249                        em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 250                                      client.addr << 1, ret);
 251                        continue;
 252                }
 253                id += ret;
 254                /* Check product ID */
 255                switch (id) {
 256                case 0x2642:
 257                        name = "OV2640";
 258                        dev->em28xx_sensor = EM28XX_OV2640;
 259                        break;
 260                case 0x7648:
 261                        name = "OV7648";
 262                        break;
 263                case 0x7660:
 264                        name = "OV7660";
 265                        break;
 266                case 0x7673:
 267                        name = "OV7670";
 268                        break;
 269                case 0x7720:
 270                        name = "OV7720";
 271                        break;
 272                case 0x7721:
 273                        name = "OV7725";
 274                        break;
 275                case 0x9648: /* Rev 2 */
 276                case 0x9649: /* Rev 3 */
 277                        name = "OV9640";
 278                        break;
 279                case 0x9650:
 280                case 0x9652: /* OV9653 */
 281                        name = "OV9650";
 282                        break;
 283                case 0x9656: /* Rev 4 */
 284                case 0x9657: /* Rev 5 */
 285                        name = "OV9655";
 286                        break;
 287                default:
 288                        em28xx_info("unknown OmniVision sensor detected: 0x%04x\n",
 289                                    id);
 290                        return 0;
 291                }
 292
 293                if (dev->em28xx_sensor == EM28XX_NOSENSOR)
 294                        em28xx_info("unsupported sensor detected: %s\n", name);
 295                else
 296                        em28xx_info("sensor %s detected\n", name);
 297
 298                dev->i2c_client[dev->def_i2c_bus].addr = client.addr;
 299                return 0;
 300        }
 301
 302        return -ENODEV;
 303}
 304
 305int em28xx_detect_sensor(struct em28xx *dev)
 306{
 307        int ret;
 308
 309        ret = em28xx_probe_sensor_micron(dev);
 310
 311        if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0)
 312                ret = em28xx_probe_sensor_omnivision(dev);
 313
 314        /*
 315         * NOTE: the Windows driver also probes i2c addresses
 316         *       0x22 (Samsung ?) and 0x66 (Kodak ?)
 317         */
 318
 319        if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) {
 320                em28xx_info("No sensor detected\n");
 321                return -ENODEV;
 322        }
 323
 324        return 0;
 325}
 326
 327int em28xx_init_camera(struct em28xx *dev)
 328{
 329        char clk_name[V4L2_CLK_NAME_SIZE];
 330        struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus];
 331        struct i2c_adapter *adap = &dev->i2c_adap[dev->def_i2c_bus];
 332        struct em28xx_v4l2 *v4l2 = dev->v4l2;
 333        int ret = 0;
 334
 335        v4l2_clk_name_i2c(clk_name, sizeof(clk_name),
 336                          i2c_adapter_id(adap), client->addr);
 337        v4l2->clk = v4l2_clk_register_fixed(clk_name, -EINVAL);
 338        if (IS_ERR(v4l2->clk))
 339                return PTR_ERR(v4l2->clk);
 340
 341        switch (dev->em28xx_sensor) {
 342        case EM28XX_MT9V011:
 343        {
 344                struct mt9v011_platform_data pdata;
 345                struct i2c_board_info mt9v011_info = {
 346                        .type = "mt9v011",
 347                        .addr = client->addr,
 348                        .platform_data = &pdata,
 349                };
 350
 351                v4l2->sensor_xres = 640;
 352                v4l2->sensor_yres = 480;
 353
 354                /*
 355                 * FIXME: mt9v011 uses I2S speed as xtal clk - at least with
 356                 * the Silvercrest cam I have here for testing - for higher
 357                 * resolutions, a high clock cause horizontal artifacts, so we
 358                 * need to use a lower xclk frequency.
 359                 * Yet, it would be possible to adjust xclk depending on the
 360                 * desired resolution, since this affects directly the
 361                 * frame rate.
 362                 */
 363                dev->board.xclk = EM28XX_XCLK_FREQUENCY_4_3MHZ;
 364                em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
 365                v4l2->sensor_xtal = 4300000;
 366                pdata.xtal = v4l2->sensor_xtal;
 367                if (NULL ==
 368                    v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap,
 369                                              &mt9v011_info, NULL)) {
 370                        ret = -ENODEV;
 371                        break;
 372                }
 373                /* probably means GRGB 16 bit bayer */
 374                v4l2->vinmode = 0x0d;
 375                v4l2->vinctl = 0x00;
 376
 377                break;
 378        }
 379        case EM28XX_MT9M001:
 380                v4l2->sensor_xres = 1280;
 381                v4l2->sensor_yres = 1024;
 382
 383                em28xx_initialize_mt9m001(dev);
 384
 385                /* probably means BGGR 16 bit bayer */
 386                v4l2->vinmode = 0x0c;
 387                v4l2->vinctl = 0x00;
 388
 389                break;
 390        case EM28XX_MT9M111:
 391                v4l2->sensor_xres = 640;
 392                v4l2->sensor_yres = 512;
 393
 394                dev->board.xclk = EM28XX_XCLK_FREQUENCY_48MHZ;
 395                em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
 396                em28xx_initialize_mt9m111(dev);
 397
 398                v4l2->vinmode = 0x0a;
 399                v4l2->vinctl = 0x00;
 400
 401                break;
 402        case EM28XX_OV2640:
 403        {
 404                struct v4l2_subdev *subdev;
 405                struct i2c_board_info ov2640_info = {
 406                        .type = "ov2640",
 407                        .flags = I2C_CLIENT_SCCB,
 408                        .addr = client->addr,
 409                        .platform_data = &camlink,
 410                };
 411                struct v4l2_subdev_format format = {
 412                        .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 413                };
 414
 415                /*
 416                 * FIXME: sensor supports resolutions up to 1600x1200, but
 417                 * resolution setting/switching needs to be modified to
 418                 * - switch sensor output resolution (including further
 419                 *   configuration changes)
 420                 * - adjust bridge xclk
 421                 * - disable 16 bit (12 bit) output formats on high resolutions
 422                 */
 423                v4l2->sensor_xres = 640;
 424                v4l2->sensor_yres = 480;
 425
 426                subdev =
 427                     v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap,
 428                                               &ov2640_info, NULL);
 429                if (NULL == subdev) {
 430                        ret = -ENODEV;
 431                        break;
 432                }
 433
 434                format.format.code = MEDIA_BUS_FMT_YUYV8_2X8;
 435                format.format.width = 640;
 436                format.format.height = 480;
 437                v4l2_subdev_call(subdev, pad, set_fmt, NULL, &format);
 438
 439                /* NOTE: for UXGA=1600x1200 switch to 12MHz */
 440                dev->board.xclk = EM28XX_XCLK_FREQUENCY_24MHZ;
 441                em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
 442                v4l2->vinmode = 0x08;
 443                v4l2->vinctl = 0x00;
 444
 445                break;
 446        }
 447        case EM28XX_NOSENSOR:
 448        default:
 449                ret = -EINVAL;
 450        }
 451
 452        if (ret < 0) {
 453                v4l2_clk_unregister_fixed(v4l2->clk);
 454                v4l2->clk = NULL;
 455        }
 456
 457        return ret;
 458}
 459EXPORT_SYMBOL_GPL(em28xx_init_camera);
 460