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 */
  30 static 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 */
  38 static 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 */
  45 static 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 */
  65 static 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  */
  96 static 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  */
 180 static 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
 288 int 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
 311 int 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 }
 423 EXPORT_SYMBOL_GPL(em28xx_init_camera);