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/mt9v011.h>
  25 #include <media/v4l2-clk.h>
  26 #include <media/v4l2-common.h>
  27
  28 #include "em28xx.h"
  29
  30
  31 /* Possible i2c addresses of Micron sensors */
  32 static unsigned short micron_sensor_addrs[] = {
  33         0xb8 >> 1,   /* MT9V111, MT9V403 */
  34         0xba >> 1,   /* MT9M001/011/111/112, MT9V011/012/112, MT9D011 */
  35         0x90 >> 1,   /* MT9V012/112, MT9D011 (alternative address) */
  36         I2C_CLIENT_END
  37 };
  38
  39 /* Possible i2c addresses of Omnivision sensors */
  40 static unsigned short omnivision_sensor_addrs[] = {
  41         0x42 >> 1,   /* OV7725, OV7670/60/48 */
  42         0x60 >> 1,   /* OV2640, OV9650/53/55 */
  43         I2C_CLIENT_END
  44 };
  45
  46
  47 static struct soc_camera_link camlink = {
  48         .bus_id = 0,
  49         .flags = 0,
  50         .module_name = "em28xx",
  51         .unbalanced_power = true,
  52 };
  53
  54
  55 /* FIXME: Should be replaced by a proper mt9m111 driver */
  56 static int em28xx_initialize_mt9m111(struct em28xx *dev)
  57 {
  58         int i;
  59         unsigned char regs[][3] = {
  60                 { 0x0d, 0x00, 0x01, },  /* reset and use defaults */
  61                 { 0x0d, 0x00, 0x00, },
  62                 { 0x0a, 0x00, 0x21, },
  63                 { 0x21, 0x04, 0x00, },  /* full readout speed, no row/col skipping */
  64         };
  65
  66         for (i = 0; i < ARRAY_SIZE(regs); i++)
  67                 i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
  68                                 &regs[i][0], 3);
  69
  70         return 0;
  71 }
  72
  73
  74 /* FIXME: Should be replaced by a proper mt9m001 driver */
  75 static int em28xx_initialize_mt9m001(struct em28xx *dev)
  76 {
  77         int i;
  78         unsigned char regs[][3] = {
  79                 { 0x0d, 0x00, 0x01, },
  80                 { 0x0d, 0x00, 0x00, },
  81                 { 0x04, 0x05, 0x00, },  /* hres = 1280 */
  82                 { 0x03, 0x04, 0x00, },  /* vres = 1024 */
  83                 { 0x20, 0x11, 0x00, },
  84                 { 0x06, 0x00, 0x10, },
  85                 { 0x2b, 0x00, 0x24, },
  86                 { 0x2e, 0x00, 0x24, },
  87                 { 0x35, 0x00, 0x24, },
  88                 { 0x2d, 0x00, 0x20, },
  89                 { 0x2c, 0x00, 0x20, },
  90                 { 0x09, 0x0a, 0xd4, },
  91                 { 0x35, 0x00, 0x57, },
  92         };
  93
  94         for (i = 0; i < ARRAY_SIZE(regs); i++)
  95                 i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
  96                                 &regs[i][0], 3);
  97
  98         return 0;
  99 }
 100
 101
 102 /*
 103  * Probes Micron sensors with 8 bit address and 16 bit register width
 104  */
 105 static int em28xx_probe_sensor_micron(struct em28xx *dev)
 106 {
 107         int ret, i;
 108         char *name;
 109         u8 reg;
 110         __be16 id_be;
 111         u16 id;
 112
 113         struct i2c_client client = dev->i2c_client[dev->def_i2c_bus];
 114
 115         dev->em28xx_sensor = EM28XX_NOSENSOR;
 116         for (i = 0; micron_sensor_addrs[i] != I2C_CLIENT_END; i++) {
 117                 client.addr = micron_sensor_addrs[i];
 118                 /* NOTE: i2c_smbus_read_word_data() doesn't work with BE data */
 119                 /* Read chip ID from register 0x00 */
 120                 reg = 0x00;
 121                 ret = i2c_master_send(&client, &reg, 1);
 122                 if (ret < 0) {
 123                         if (ret != -ENODEV)
 124                                 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 125                                               client.addr << 1, ret);
 126                         continue;
 127                 }
 128                 ret = i2c_master_recv(&client, (u8 *)&id_be, 2);
 129                 if (ret < 0) {
 130                         em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 131                                       client.addr << 1, ret);
 132                         continue;
 133                 }
 134                 id = be16_to_cpu(id_be);
 135                 /* Read chip ID from register 0xff */
 136                 reg = 0xff;
 137                 ret = i2c_master_send(&client, &reg, 1);
 138                 if (ret < 0) {
 139                         em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 140                                       client.addr << 1, ret);
 141                         continue;
 142                 }
 143                 ret = i2c_master_recv(&client, (u8 *)&id_be, 2);
 144                 if (ret < 0) {
 145                         em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 146                                       client.addr << 1, ret);
 147                         continue;
 148                 }
 149                 /* Validate chip ID to be sure we have a Micron device */
 150                 if (id != be16_to_cpu(id_be))
 151                         continue;
 152                 /* Check chip ID */
 153                 id = be16_to_cpu(id_be);
 154                 switch (id) {
 155                 case 0x1222:
 156                         name = "MT9V012"; /* MI370 */ /* 640x480 */
 157                         break;
 158                 case 0x1229:
 159                         name = "MT9V112"; /* 640x480 */
 160                         break;
 161                 case 0x1433:
 162                         name = "MT9M011"; /* 1280x1024 */
 163                         break;
 164                 case 0x143a:    /* found in the ECS G200 */
 165                         name = "MT9M111"; /* MI1310 */ /* 1280x1024 */
 166                         dev->em28xx_sensor = EM28XX_MT9M111;
 167                         break;
 168                 case 0x148c:
 169                         name = "MT9M112"; /* MI1320 */ /* 1280x1024 */
 170                         break;
 171                 case 0x1511:
 172                         name = "MT9D011"; /* MI2010 */ /* 1600x1200 */
 173                         break;
 174                 case 0x8232:
 175                 case 0x8243:    /* rev B */
 176                         name = "MT9V011"; /* MI360 */ /* 640x480 */
 177                         dev->em28xx_sensor = EM28XX_MT9V011;
 178                         break;
 179                 case 0x8431:
 180                         name = "MT9M001"; /* 1280x1024 */
 181                         dev->em28xx_sensor = EM28XX_MT9M001;
 182                         break;
 183                 default:
 184                         em28xx_info("unknown Micron sensor detected: 0x%04x\n",
 185                                     id);
 186                         return 0;
 187                 }
 188
 189                 if (dev->em28xx_sensor == EM28XX_NOSENSOR)
 190                         em28xx_info("unsupported sensor detected: %s\n", name);
 191                 else
 192                         em28xx_info("sensor %s detected\n", name);
 193
 194                 dev->i2c_client[dev->def_i2c_bus].addr = client.addr;
 195                 return 0;
 196         }
 197
 198         return -ENODEV;
 199 }
 200
 201 /*
 202  * Probes Omnivision sensors with 8 bit address and register width
 203  */
 204 static int em28xx_probe_sensor_omnivision(struct em28xx *dev)
 205 {
 206         int ret, i;
 207         char *name;
 208         u8 reg;
 209         u16 id;
 210         struct i2c_client client = dev->i2c_client[dev->def_i2c_bus];
 211
 212         dev->em28xx_sensor = EM28XX_NOSENSOR;
 213         /* NOTE: these devices have the register auto incrementation disabled
 214          * by default, so we have to use single byte reads !              */
 215         for (i = 0; omnivision_sensor_addrs[i] != I2C_CLIENT_END; i++) {
 216                 client.addr = omnivision_sensor_addrs[i];
 217                 /* Read manufacturer ID from registers 0x1c-0x1d (BE) */
 218                 reg = 0x1c;
 219                 ret = i2c_smbus_read_byte_data(&client, reg);
 220                 if (ret < 0) {
 221                         if (ret != -ENODEV)
 222                                 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 223                                               client.addr << 1, ret);
 224                         continue;
 225                 }
 226                 id = ret << 8;
 227                 reg = 0x1d;
 228                 ret = i2c_smbus_read_byte_data(&client, reg);
 229                 if (ret < 0) {
 230                         em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 231                                       client.addr << 1, ret);
 232                         continue;
 233                 }
 234                 id += ret;
 235                 /* Check manufacturer ID */
 236                 if (id != 0x7fa2)
 237                         continue;
 238                 /* Read product ID from registers 0x0a-0x0b (BE) */
 239                 reg = 0x0a;
 240                 ret = i2c_smbus_read_byte_data(&client, reg);
 241                 if (ret < 0) {
 242                         em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 243                                       client.addr << 1, ret);
 244                         continue;
 245                 }
 246                 id = ret << 8;
 247                 reg = 0x0b;
 248                 ret = i2c_smbus_read_byte_data(&client, reg);
 249                 if (ret < 0) {
 250                         em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 251                                       client.addr << 1, ret);
 252                         continue;
 253                 }
 254                 id += ret;
 255                 /* Check product ID */
 256                 switch (id) {
 257                 case 0x2642:
 258                         name = "OV2640";
 259                         dev->em28xx_sensor = EM28XX_OV2640;
 260                         break;
 261                 case 0x7648:
 262                         name = "OV7648";
 263                         break;
 264                 case 0x7660:
 265                         name = "OV7660";
 266                         break;
 267                 case 0x7673:
 268                         name = "OV7670";
 269                         break;
 270                 case 0x7720:
 271                         name = "OV7720";
 272                         break;
 273                 case 0x7721:
 274                         name = "OV7725";
 275                         break;
 276                 case 0x9648: /* Rev 2 */
 277                 case 0x9649: /* Rev 3 */
 278                         name = "OV9640";
 279                         break;
 280                 case 0x9650:
 281                 case 0x9652: /* OV9653 */
 282                         name = "OV9650";
 283                         break;
 284                 case 0x9656: /* Rev 4 */
 285                 case 0x9657: /* Rev 5 */
 286                         name = "OV9655";
 287                         break;
 288                 default:
 289                         em28xx_info("unknown OmniVision sensor detected: 0x%04x\n",
 290                                     id);
 291                         return 0;
 292                 }
 293
 294                 if (dev->em28xx_sensor == EM28XX_NOSENSOR)
 295                         em28xx_info("unsupported sensor detected: %s\n", name);
 296                 else
 297                         em28xx_info("sensor %s detected\n", name);
 298
 299                 dev->i2c_client[dev->def_i2c_bus].addr = client.addr;
 300                 return 0;
 301         }
 302
 303         return -ENODEV;
 304 }
 305
 306 int em28xx_detect_sensor(struct em28xx *dev)
 307 {
 308         int ret;
 309
 310         ret = em28xx_probe_sensor_micron(dev);
 311
 312         if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0)
 313                 ret = em28xx_probe_sensor_omnivision(dev);
 314
 315         /*
 316          * NOTE: the Windows driver also probes i2c addresses
 317          *       0x22 (Samsung ?) and 0x66 (Kodak ?)
 318          */
 319
 320         if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) {
 321                 em28xx_info("No sensor detected\n");
 322                 return -ENODEV;
 323         }
 324
 325         return 0;
 326 }
 327
 328 int em28xx_init_camera(struct em28xx *dev)
 329 {
 330         char clk_name[V4L2_SUBDEV_NAME_SIZE];
 331         struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus];
 332         struct i2c_adapter *adap = &dev->i2c_adap[dev->def_i2c_bus];
 333         int ret = 0;
 334
 335         v4l2_clk_name_i2c(clk_name, sizeof(clk_name),
 336                           i2c_adapter_id(adap), client->addr);
 337         dev->clk = v4l2_clk_register_fixed(clk_name, "mclk", -EINVAL);
 338         if (IS_ERR(dev->clk))
 339                 return PTR_ERR(dev->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                 dev->sensor_xres = 640;
 352                 dev->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                 dev->sensor_xtal = 4300000;
 366                 pdata.xtal = dev->sensor_xtal;
 367                 if (NULL ==
 368                     v4l2_i2c_new_subdev_board(&dev->v4l2_dev, adap,
 369                                               &mt9v011_info, NULL)) {
 370                         ret = -ENODEV;
 371                         break;
 372                 }
 373                 /* probably means GRGB 16 bit bayer */
 374                 dev->vinmode = 0x0d;
 375                 dev->vinctl = 0x00;
 376
 377                 break;
 378         }
 379         case EM28XX_MT9M001:
 380                 dev->sensor_xres = 1280;
 381                 dev->sensor_yres = 1024;
 382
 383                 em28xx_initialize_mt9m001(dev);
 384
 385                 /* probably means BGGR 16 bit bayer */
 386                 dev->vinmode = 0x0c;
 387                 dev->vinctl = 0x00;
 388
 389                 break;
 390         case EM28XX_MT9M111:
 391                 dev->sensor_xres = 640;
 392                 dev->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                 dev->vinmode = 0x0a;
 399                 dev->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_mbus_framefmt fmt;
 412
 413                 /*
 414                  * FIXME: sensor supports resolutions up to 1600x1200, but
 415                  * resolution setting/switching needs to be modified to
 416                  * - switch sensor output resolution (including further
 417                  *   configuration changes)
 418                  * - adjust bridge xclk
 419                  * - disable 16 bit (12 bit) output formats on high resolutions
 420                  */
 421                 dev->sensor_xres = 640;
 422                 dev->sensor_yres = 480;
 423
 424                 subdev =
 425                      v4l2_i2c_new_subdev_board(&dev->v4l2_dev, adap,
 426                                                &ov2640_info, NULL);
 427                 if (NULL == subdev) {
 428                         ret = -ENODEV;
 429                         break;
 430                 }
 431
 432                 fmt.code = V4L2_MBUS_FMT_YUYV8_2X8;
 433                 fmt.width = 640;
 434                 fmt.height = 480;
 435                 v4l2_subdev_call(subdev, video, s_mbus_fmt, &fmt);
 436
 437                 /* NOTE: for UXGA=1600x1200 switch to 12MHz */
 438                 dev->board.xclk = EM28XX_XCLK_FREQUENCY_24MHZ;
 439                 em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
 440                 dev->vinmode = 0x08;
 441                 dev->vinctl = 0x00;
 442
 443                 break;
 444         }
 445         case EM28XX_NOSENSOR:
 446         default:
 447                 ret = -EINVAL;
 448         }
 449
 450         if (ret < 0) {
 451                 v4l2_clk_unregister_fixed(dev->clk);
 452                 dev->clk = NULL;
 453         }
 454
 455         return ret;
 456 }
 457 EXPORT_SYMBOL_GPL(em28xx_init_camera);