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

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // em28xx-camera.c - driver for Empia EM25xx/27xx/28xx USB video capture devices
   4 //
   5 // Copyright (C) 2009 Mauro Carvalho Chehab <mchehab@kernel.org>
   6 // Copyright (C) 2013 Frank Schäfer <fschaefer.oss@googlemail.com>
   7
   8 #include "em28xx.h"
   9
  10 #include <linux/i2c.h>
  11 #include <linux/usb.h>
  12 #include <media/i2c/mt9v011.h>
  13 #include <media/v4l2-common.h>
  14
  15 /* Possible i2c addresses of Micron sensors */
  16 static unsigned short micron_sensor_addrs[] = {
  17         0xb8 >> 1,   /* MT9V111, MT9V403 */
  18         0xba >> 1,   /* MT9M001/011/111/112, MT9V011/012/112, MT9D011 */
  19         0x90 >> 1,   /* MT9V012/112, MT9D011 (alternative address) */
  20         I2C_CLIENT_END
  21 };
  22
  23 /* Possible i2c addresses of Omnivision sensors */
  24 static unsigned short omnivision_sensor_addrs[] = {
  25         0x42 >> 1,   /* OV7725, OV7670/60/48 */
  26         0x60 >> 1,   /* OV2640, OV9650/53/55 */
  27         I2C_CLIENT_END
  28 };
  29
  30 /* FIXME: Should be replaced by a proper mt9m111 driver */
  31 static int em28xx_initialize_mt9m111(struct em28xx *dev)
  32 {
  33         int i;
  34         unsigned char regs[][3] = {
  35                 { 0x0d, 0x00, 0x01, },  /* reset and use defaults */
  36                 { 0x0d, 0x00, 0x00, },
  37                 { 0x0a, 0x00, 0x21, },
  38                 { 0x21, 0x04, 0x00, },  /* full readout spd, no row/col skip */
  39         };
  40
  41         for (i = 0; i < ARRAY_SIZE(regs); i++)
  42                 i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
  43                                 &regs[i][0], 3);
  44
  45         /* FIXME: This won't be creating a sensor at the media graph */
  46
  47         return 0;
  48 }
  49
  50 /* FIXME: Should be replaced by a proper mt9m001 driver */
  51 static int em28xx_initialize_mt9m001(struct em28xx *dev)
  52 {
  53         int i;
  54         unsigned char regs[][3] = {
  55                 { 0x0d, 0x00, 0x01, },
  56                 { 0x0d, 0x00, 0x00, },
  57                 { 0x04, 0x05, 0x00, },  /* hres = 1280 */
  58                 { 0x03, 0x04, 0x00, },  /* vres = 1024 */
  59                 { 0x20, 0x11, 0x00, },
  60                 { 0x06, 0x00, 0x10, },
  61                 { 0x2b, 0x00, 0x24, },
  62                 { 0x2e, 0x00, 0x24, },
  63                 { 0x35, 0x00, 0x24, },
  64                 { 0x2d, 0x00, 0x20, },
  65                 { 0x2c, 0x00, 0x20, },
  66                 { 0x09, 0x0a, 0xd4, },
  67                 { 0x35, 0x00, 0x57, },
  68         };
  69
  70         for (i = 0; i < ARRAY_SIZE(regs); i++)
  71                 i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
  72                                 &regs[i][0], 3);
  73
  74         /* FIXME: This won't be creating a sensor at the media graph */
  75
  76         return 0;
  77 }
  78
  79 /*
  80  * Probes Micron sensors with 8 bit address and 16 bit register width
  81  */
  82 static int em28xx_probe_sensor_micron(struct em28xx *dev)
  83 {
  84         int ret, i;
  85         char *name;
  86         u16 id;
  87
  88         struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus];
  89
  90         dev->em28xx_sensor = EM28XX_NOSENSOR;
  91         for (i = 0; micron_sensor_addrs[i] != I2C_CLIENT_END; i++) {
  92                 client->addr = micron_sensor_addrs[i];
  93                 /* Read chip ID from register 0x00 */
  94                 ret = i2c_smbus_read_word_data(client, 0x00); /* assumes LE */
  95                 if (ret < 0) {
  96                         if (ret != -ENXIO)
  97                                 dev_err(&dev->intf->dev,
  98                                         "couldn't read from i2c device 0x%02x: error %i\n",
  99                                        client->addr << 1, ret);
 100                         continue;
 101                 }
 102                 id = swab16(ret); /* LE -> BE */
 103                 /* Read chip ID from register 0xff */
 104                 ret = i2c_smbus_read_word_data(client, 0xff);
 105                 if (ret < 0) {
 106                         dev_err(&dev->intf->dev,
 107                                 "couldn't read from i2c device 0x%02x: error %i\n",
 108                                 client->addr << 1, ret);
 109                         continue;
 110                 }
 111                 /* Validate chip ID to be sure we have a Micron device */
 112                 if (id != swab16(ret))
 113                         continue;
 114                 /* Check chip ID */
 115                 switch (id) {
 116                 case 0x1222:
 117                         name = "MT9V012"; /* MI370 */ /* 640x480 */
 118                         break;
 119                 case 0x1229:
 120                         name = "MT9V112"; /* 640x480 */
 121                         break;
 122                 case 0x1433:
 123                         name = "MT9M011"; /* 1280x1024 */
 124                         break;
 125                 case 0x143a:    /* found in the ECS G200 */
 126                         name = "MT9M111"; /* MI1310 */ /* 1280x1024 */
 127                         dev->em28xx_sensor = EM28XX_MT9M111;
 128                         break;
 129                 case 0x148c:
 130                         name = "MT9M112"; /* MI1320 */ /* 1280x1024 */
 131                         break;
 132                 case 0x1511:
 133                         name = "MT9D011"; /* MI2010 */ /* 1600x1200 */
 134                         break;
 135                 case 0x8232:
 136                 case 0x8243:    /* rev B */
 137                         name = "MT9V011"; /* MI360 */ /* 640x480 */
 138                         dev->em28xx_sensor = EM28XX_MT9V011;
 139                         break;
 140                 case 0x8431:
 141                         name = "MT9M001"; /* 1280x1024 */
 142                         dev->em28xx_sensor = EM28XX_MT9M001;
 143                         break;
 144                 default:
 145                         dev_info(&dev->intf->dev,
 146                                  "unknown Micron sensor detected: 0x%04x\n",
 147                                  id);
 148                         return 0;
 149                 }
 150
 151                 if (dev->em28xx_sensor == EM28XX_NOSENSOR)
 152                         dev_info(&dev->intf->dev,
 153                                  "unsupported sensor detected: %s\n", name);
 154                 else
 155                         dev_info(&dev->intf->dev,
 156                                  "sensor %s detected\n", name);
 157
 158                 return 0;
 159         }
 160
 161         return -ENODEV;
 162 }
 163
 164 /*
 165  * Probes Omnivision sensors with 8 bit address and register width
 166  */
 167 static int em28xx_probe_sensor_omnivision(struct em28xx *dev)
 168 {
 169         int ret, i;
 170         char *name;
 171         u8 reg;
 172         u16 id;
 173         struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus];
 174
 175         dev->em28xx_sensor = EM28XX_NOSENSOR;
 176         /*
 177          * NOTE: these devices have the register auto incrementation disabled
 178          * by default, so we have to use single byte reads !
 179          */
 180         for (i = 0; omnivision_sensor_addrs[i] != I2C_CLIENT_END; i++) {
 181                 client->addr = omnivision_sensor_addrs[i];
 182                 /* Read manufacturer ID from registers 0x1c-0x1d (BE) */
 183                 reg = 0x1c;
 184                 ret = i2c_smbus_read_byte_data(client, reg);
 185                 if (ret < 0) {
 186                         if (ret != -ENXIO)
 187                                 dev_err(&dev->intf->dev,
 188                                         "couldn't read from i2c device 0x%02x: error %i\n",
 189                                         client->addr << 1, ret);
 190                         continue;
 191                 }
 192                 id = ret << 8;
 193                 reg = 0x1d;
 194                 ret = i2c_smbus_read_byte_data(client, reg);
 195                 if (ret < 0) {
 196                         dev_err(&dev->intf->dev,
 197                                 "couldn't read from i2c device 0x%02x: error %i\n",
 198                                 client->addr << 1, ret);
 199                         continue;
 200                 }
 201                 id += ret;
 202                 /* Check manufacturer ID */
 203                 if (id != 0x7fa2)
 204                         continue;
 205                 /* Read product ID from registers 0x0a-0x0b (BE) */
 206                 reg = 0x0a;
 207                 ret = i2c_smbus_read_byte_data(client, reg);
 208                 if (ret < 0) {
 209                         dev_err(&dev->intf->dev,
 210                                 "couldn't read from i2c device 0x%02x: error %i\n",
 211                                 client->addr << 1, ret);
 212                         continue;
 213                 }
 214                 id = ret << 8;
 215                 reg = 0x0b;
 216                 ret = i2c_smbus_read_byte_data(client, reg);
 217                 if (ret < 0) {
 218                         dev_err(&dev->intf->dev,
 219                                 "couldn't read from i2c device 0x%02x: error %i\n",
 220                                 client->addr << 1, ret);
 221                         continue;
 222                 }
 223                 id += ret;
 224                 /* Check product ID */
 225                 switch (id) {
 226                 case 0x2642:
 227                         name = "OV2640";
 228                         dev->em28xx_sensor = EM28XX_OV2640;
 229                         break;
 230                 case 0x7648:
 231                         name = "OV7648";
 232                         break;
 233                 case 0x7660:
 234                         name = "OV7660";
 235                         break;
 236                 case 0x7673:
 237                         name = "OV7670";
 238                         break;
 239                 case 0x7720:
 240                         name = "OV7720";
 241                         break;
 242                 case 0x7721:
 243                         name = "OV7725";
 244                         break;
 245                 case 0x9648: /* Rev 2 */
 246                 case 0x9649: /* Rev 3 */
 247                         name = "OV9640";
 248                         break;
 249                 case 0x9650:
 250                 case 0x9652: /* OV9653 */
 251                         name = "OV9650";
 252                         break;
 253                 case 0x9656: /* Rev 4 */
 254                 case 0x9657: /* Rev 5 */
 255                         name = "OV9655";
 256                         break;
 257                 default:
 258                         dev_info(&dev->intf->dev,
 259                                  "unknown OmniVision sensor detected: 0x%04x\n",
 260                                 id);
 261                         return 0;
 262                 }
 263
 264                 if (dev->em28xx_sensor == EM28XX_NOSENSOR)
 265                         dev_info(&dev->intf->dev,
 266                                  "unsupported sensor detected: %s\n", name);
 267                 else
 268                         dev_info(&dev->intf->dev,
 269                                  "sensor %s detected\n", name);
 270
 271                 return 0;
 272         }
 273
 274         return -ENODEV;
 275 }
 276
 277 int em28xx_detect_sensor(struct em28xx *dev)
 278 {
 279         int ret;
 280
 281         ret = em28xx_probe_sensor_micron(dev);
 282
 283         if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0)
 284                 ret = em28xx_probe_sensor_omnivision(dev);
 285
 286         /*
 287          * NOTE: the Windows driver also probes i2c addresses
 288          *       0x22 (Samsung ?) and 0x66 (Kodak ?)
 289          */
 290
 291         if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) {
 292                 dev_info(&dev->intf->dev,
 293                          "No sensor detected\n");
 294                 return -ENODEV;
 295         }
 296
 297         return 0;
 298 }
 299
 300 int em28xx_init_camera(struct em28xx *dev)
 301 {
 302         struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus];
 303         struct i2c_adapter *adap = &dev->i2c_adap[dev->def_i2c_bus];
 304         struct em28xx_v4l2 *v4l2 = dev->v4l2;
 305
 306         switch (dev->em28xx_sensor) {
 307         case EM28XX_MT9V011:
 308         {
 309                 struct mt9v011_platform_data pdata;
 310                 struct i2c_board_info mt9v011_info = {
 311                         .type = "mt9v011",
 312                         .addr = client->addr,
 313                         .platform_data = &pdata,
 314                 };
 315
 316                 v4l2->sensor_xres = 640;
 317                 v4l2->sensor_yres = 480;
 318
 319                 /*
 320                  * FIXME: mt9v011 uses I2S speed as xtal clk - at least with
 321                  * the Silvercrest cam I have here for testing - for higher
 322                  * resolutions, a high clock cause horizontal artifacts, so we
 323                  * need to use a lower xclk frequency.
 324                  * Yet, it would be possible to adjust xclk depending on the
 325                  * desired resolution, since this affects directly the
 326                  * frame rate.
 327                  */
 328                 dev->board.xclk = EM28XX_XCLK_FREQUENCY_4_3MHZ;
 329                 em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
 330                 v4l2->sensor_xtal = 4300000;
 331                 pdata.xtal = v4l2->sensor_xtal;
 332                 if (NULL ==
 333                     v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap,
 334                                               &mt9v011_info, NULL))
 335                         return -ENODEV;
 336                 v4l2->vinmode = EM28XX_VINMODE_RGB8_GRBG;
 337                 v4l2->vinctl = 0x00;
 338
 339                 break;
 340         }
 341         case EM28XX_MT9M001:
 342                 v4l2->sensor_xres = 1280;
 343                 v4l2->sensor_yres = 1024;
 344
 345                 em28xx_initialize_mt9m001(dev);
 346
 347                 v4l2->vinmode = EM28XX_VINMODE_RGB8_BGGR;
 348                 v4l2->vinctl = 0x00;
 349
 350                 break;
 351         case EM28XX_MT9M111:
 352                 v4l2->sensor_xres = 640;
 353                 v4l2->sensor_yres = 512;
 354
 355                 dev->board.xclk = EM28XX_XCLK_FREQUENCY_48MHZ;
 356                 em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
 357                 em28xx_initialize_mt9m111(dev);
 358
 359                 v4l2->vinmode = EM28XX_VINMODE_YUV422_UYVY;
 360                 v4l2->vinctl = 0x00;
 361
 362                 break;
 363         case EM28XX_OV2640:
 364         {
 365                 struct v4l2_subdev *subdev;
 366                 struct i2c_board_info ov2640_info = {
 367                         .type = "ov2640",
 368                         .flags = I2C_CLIENT_SCCB,
 369                         .addr = client->addr,
 370                 };
 371                 struct v4l2_subdev_format format = {
 372                         .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 373                 };
 374
 375                 /*
 376                  * FIXME: sensor supports resolutions up to 1600x1200, but
 377                  * resolution setting/switching needs to be modified to
 378                  * - switch sensor output resolution (including further
 379                  *   configuration changes)
 380                  * - adjust bridge xclk
 381                  * - disable 16 bit (12 bit) output formats on high resolutions
 382                  */
 383                 v4l2->sensor_xres = 640;
 384                 v4l2->sensor_yres = 480;
 385
 386                 subdev =
 387                      v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap,
 388                                                &ov2640_info, NULL);
 389                 if (!subdev)
 390                         return -ENODEV;
 391
 392                 format.format.code = MEDIA_BUS_FMT_YUYV8_2X8;
 393                 format.format.width = 640;
 394                 format.format.height = 480;
 395                 v4l2_subdev_call(subdev, pad, set_fmt, NULL, &format);
 396
 397                 /* NOTE: for UXGA=1600x1200 switch to 12MHz */
 398                 dev->board.xclk = EM28XX_XCLK_FREQUENCY_24MHZ;
 399                 em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
 400                 v4l2->vinmode = EM28XX_VINMODE_YUV422_YUYV;
 401                 v4l2->vinctl = 0x00;
 402
 403                 break;
 404         }
 405         case EM28XX_NOSENSOR:
 406         default:
 407                 return -EINVAL;
 408         }
 409
 410         return 0;
 411 }
 412 EXPORT_SYMBOL_GPL(em28xx_init_camera);