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 */
  31 static 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 */
  39 static 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
  45 static 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 */
  53 static 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 */
  73 static 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  */
 104 static 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  */
 203 static 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
 305 int 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
 327 int 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 }
 459 EXPORT_SYMBOL_GPL(em28xx_init_camera);