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-common.h>
  26
  27 #include "em28xx.h"
  28
  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
  46 static struct soc_camera_link camlink = {
  47         .bus_id = 0,
  48         .flags = 0,
  49         .module_name = "em28xx",
  50 };
  51
  52
  53 /* FIXME: Should be replaced by a proper mt9m111 driver */
  54 static int em28xx_initialize_mt9m111(struct em28xx *dev)
  55 {
  56         int i;
  57         unsigned char regs[][3] = {
  58                 { 0x0d, 0x00, 0x01, },  /* reset and use defaults */
  59                 { 0x0d, 0x00, 0x00, },
  60                 { 0x0a, 0x00, 0x21, },
  61                 { 0x21, 0x04, 0x00, },  /* full readout speed, no row/col skipping */
  62         };
  63
  64         for (i = 0; i < ARRAY_SIZE(regs); i++)
  65                 i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
  66                                 &regs[i][0], 3);
  67
  68         return 0;
  69 }
  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         return 0;
  97 }
  98
  99
 100 /*
 101  * Probes Micron sensors with 8 bit address and 16 bit register width
 102  */
 103 static int em28xx_probe_sensor_micron(struct em28xx *dev)
 104 {
 105         int ret, i;
 106         char *name;
 107         u8 reg;
 108         __be16 id_be;
 109         u16 id;
 110
 111         struct i2c_client client = dev->i2c_client[dev->def_i2c_bus];
 112
 113         dev->em28xx_sensor = EM28XX_NOSENSOR;
 114         for (i = 0; micron_sensor_addrs[i] != I2C_CLIENT_END; i++) {
 115                 client.addr = micron_sensor_addrs[i];
 116                 /* NOTE: i2c_smbus_read_word_data() doesn't work with BE data */
 117                 /* Read chip ID from register 0x00 */
 118                 reg = 0x00;
 119                 ret = i2c_master_send(&client, &reg, 1);
 120                 if (ret < 0) {
 121                         if (ret != -ENODEV)
 122                                 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 123                                               client.addr << 1, ret);
 124                         continue;
 125                 }
 126                 ret = i2c_master_recv(&client, (u8 *)&id_be, 2);
 127                 if (ret < 0) {
 128                         em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 129                                       client.addr << 1, ret);
 130                         continue;
 131                 }
 132                 id = be16_to_cpu(id_be);
 133                 /* Read chip ID from register 0xff */
 134                 reg = 0xff;
 135                 ret = i2c_master_send(&client, &reg, 1);
 136                 if (ret < 0) {
 137                         em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 138                                       client.addr << 1, ret);
 139                         continue;
 140                 }
 141                 ret = i2c_master_recv(&client, (u8 *)&id_be, 2);
 142                 if (ret < 0) {
 143                         em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 144                                       client.addr << 1, ret);
 145                         continue;
 146                 }
 147                 /* Validate chip ID to be sure we have a Micron device */
 148                 if (id != be16_to_cpu(id_be))
 149                         continue;
 150                 /* Check chip ID */
 151                 id = be16_to_cpu(id_be);
 152                 switch (id) {
 153                 case 0x1222:
 154                         name = "MT9V012"; /* MI370 */ /* 640x480 */
 155                         break;
 156                 case 0x1229:
 157                         name = "MT9V112"; /* 640x480 */
 158                         break;
 159                 case 0x1433:
 160                         name = "MT9M011"; /* 1280x1024 */
 161                         break;
 162                 case 0x143a:    /* found in the ECS G200 */
 163                         name = "MT9M111"; /* MI1310 */ /* 1280x1024 */
 164                         dev->em28xx_sensor = EM28XX_MT9M111;
 165                         break;
 166                 case 0x148c:
 167                         name = "MT9M112"; /* MI1320 */ /* 1280x1024 */
 168                         break;
 169                 case 0x1511:
 170                         name = "MT9D011"; /* MI2010 */ /* 1600x1200 */
 171                         break;
 172                 case 0x8232:
 173                 case 0x8243:    /* rev B */
 174                         name = "MT9V011"; /* MI360 */ /* 640x480 */
 175                         dev->em28xx_sensor = EM28XX_MT9V011;
 176                         break;
 177                 case 0x8431:
 178                         name = "MT9M001"; /* 1280x1024 */
 179                         dev->em28xx_sensor = EM28XX_MT9M001;
 180                         break;
 181                 default:
 182                         em28xx_info("unknown Micron sensor detected: 0x%04x\n",
 183                                     id);
 184                         return 0;
 185                 }
 186
 187                 if (dev->em28xx_sensor == EM28XX_NOSENSOR)
 188                         em28xx_info("unsupported sensor detected: %s\n", name);
 189                 else
 190                         em28xx_info("sensor %s detected\n", name);
 191
 192                 dev->i2c_client[dev->def_i2c_bus].addr = client.addr;
 193                 return 0;
 194         }
 195
 196         return -ENODEV;
 197 }
 198
 199 /*
 200  * Probes Omnivision sensors with 8 bit address and register width
 201  */
 202 static int em28xx_probe_sensor_omnivision(struct em28xx *dev)
 203 {
 204         int ret, i;
 205         char *name;
 206         u8 reg;
 207         u16 id;
 208         struct i2c_client client = dev->i2c_client[dev->def_i2c_bus];
 209
 210         dev->em28xx_sensor = EM28XX_NOSENSOR;
 211         /* NOTE: these devices have the register auto incrementation disabled
 212          * by default, so we have to use single byte reads !              */
 213         for (i = 0; omnivision_sensor_addrs[i] != I2C_CLIENT_END; i++) {
 214                 client.addr = omnivision_sensor_addrs[i];
 215                 /* Read manufacturer ID from registers 0x1c-0x1d (BE) */
 216                 reg = 0x1c;
 217                 ret = i2c_smbus_read_byte_data(&client, reg);
 218                 if (ret < 0) {
 219                         if (ret != -ENODEV)
 220                                 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 221                                               client.addr << 1, ret);
 222                         continue;
 223                 }
 224                 id = ret << 8;
 225                 reg = 0x1d;
 226                 ret = i2c_smbus_read_byte_data(&client, reg);
 227                 if (ret < 0) {
 228                         em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 229                                       client.addr << 1, ret);
 230                         continue;
 231                 }
 232                 id += ret;
 233                 /* Check manufacturer ID */
 234                 if (id != 0x7fa2)
 235                         continue;
 236                 /* Read product ID from registers 0x0a-0x0b (BE) */
 237                 reg = 0x0a;
 238                 ret = i2c_smbus_read_byte_data(&client, reg);
 239                 if (ret < 0) {
 240                         em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 241                                       client.addr << 1, ret);
 242                         continue;
 243                 }
 244                 id = ret << 8;
 245                 reg = 0x0b;
 246                 ret = i2c_smbus_read_byte_data(&client, reg);
 247                 if (ret < 0) {
 248                         em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n",
 249                                       client.addr << 1, ret);
 250                         continue;
 251                 }
 252                 id += ret;
 253                 /* Check product ID */
 254                 switch (id) {
 255                 case 0x2642:
 256                         name = "OV2640";
 257                         dev->em28xx_sensor = EM28XX_OV2640;
 258                         break;
 259                 case 0x7648:
 260                         name = "OV7648";
 261                         break;
 262                 case 0x7660:
 263                         name = "OV7660";
 264                         break;
 265                 case 0x7673:
 266                         name = "OV7670";
 267                         break;
 268                 case 0x7720:
 269                         name = "OV7720";
 270                         break;
 271                 case 0x7721:
 272                         name = "OV7725";
 273                         break;
 274                 case 0x9648: /* Rev 2 */
 275                 case 0x9649: /* Rev 3 */
 276                         name = "OV9640";
 277                         break;
 278                 case 0x9650:
 279                 case 0x9652: /* OV9653 */
 280                         name = "OV9650";
 281                         break;
 282                 case 0x9656: /* Rev 4 */
 283                 case 0x9657: /* Rev 5 */
 284                         name = "OV9655";
 285                         break;
 286                 default:
 287                         em28xx_info("unknown OmniVision sensor detected: 0x%04x\n",
 288                                     id);
 289                         return 0;
 290                 }
 291
 292                 if (dev->em28xx_sensor == EM28XX_NOSENSOR)
 293                         em28xx_info("unsupported sensor detected: %s\n", name);
 294                 else
 295                         em28xx_info("sensor %s detected\n", name);
 296
 297                 dev->i2c_client[dev->def_i2c_bus].addr = client.addr;
 298                 return 0;
 299         }
 300
 301         return -ENODEV;
 302 }
 303
 304 int em28xx_detect_sensor(struct em28xx *dev)
 305 {
 306         int ret;
 307
 308         ret = em28xx_probe_sensor_micron(dev);
 309
 310         if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0)
 311                 ret = em28xx_probe_sensor_omnivision(dev);
 312
 313         /*
 314          * NOTE: the Windows driver also probes i2c addresses
 315          *       0x22 (Samsung ?) and 0x66 (Kodak ?)
 316          */
 317
 318         if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) {
 319                 em28xx_info("No sensor detected\n");
 320                 return -ENODEV;
 321         }
 322
 323         return 0;
 324 }
 325
 326 int em28xx_init_camera(struct em28xx *dev)
 327 {
 328         switch (dev->em28xx_sensor) {
 329         case EM28XX_MT9V011:
 330         {
 331                 struct mt9v011_platform_data pdata;
 332                 struct i2c_board_info mt9v011_info = {
 333                         .type = "mt9v011",
 334                         .addr = dev->i2c_client[dev->def_i2c_bus].addr,
 335                         .platform_data = &pdata,
 336                 };
 337
 338                 dev->sensor_xres = 640;
 339                 dev->sensor_yres = 480;
 340
 341                 /*
 342                  * FIXME: mt9v011 uses I2S speed as xtal clk - at least with
 343                  * the Silvercrest cam I have here for testing - for higher
 344                  * resolutions, a high clock cause horizontal artifacts, so we
 345                  * need to use a lower xclk frequency.
 346                  * Yet, it would be possible to adjust xclk depending on the
 347                  * desired resolution, since this affects directly the
 348                  * frame rate.
 349                  */
 350                 dev->board.xclk = EM28XX_XCLK_FREQUENCY_4_3MHZ;
 351                 em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
 352                 dev->sensor_xtal = 4300000;
 353                 pdata.xtal = dev->sensor_xtal;
 354                 if (NULL ==
 355                     v4l2_i2c_new_subdev_board(&dev->v4l2_dev,
 356                                               &dev->i2c_adap[dev->def_i2c_bus],
 357                                               &mt9v011_info, NULL))
 358                         return -ENODEV;
 359                 /* probably means GRGB 16 bit bayer */
 360                 dev->vinmode = 0x0d;
 361                 dev->vinctl = 0x00;
 362
 363                 break;
 364         }
 365         case EM28XX_MT9M001:
 366                 dev->sensor_xres = 1280;
 367                 dev->sensor_yres = 1024;
 368
 369                 em28xx_initialize_mt9m001(dev);
 370
 371                 /* probably means BGGR 16 bit bayer */
 372                 dev->vinmode = 0x0c;
 373                 dev->vinctl = 0x00;
 374
 375                 break;
 376         case EM28XX_MT9M111:
 377                 dev->sensor_xres = 640;
 378                 dev->sensor_yres = 512;
 379
 380                 dev->board.xclk = EM28XX_XCLK_FREQUENCY_48MHZ;
 381                 em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
 382                 em28xx_initialize_mt9m111(dev);
 383
 384                 dev->vinmode = 0x0a;
 385                 dev->vinctl = 0x00;
 386
 387                 break;
 388         case EM28XX_OV2640:
 389         {
 390                 struct v4l2_subdev *subdev;
 391                 struct i2c_board_info ov2640_info = {
 392                         .type = "ov2640",
 393                         .flags = I2C_CLIENT_SCCB,
 394                         .addr = dev->i2c_client[dev->def_i2c_bus].addr,
 395                         .platform_data = &camlink,
 396                 };
 397                 struct v4l2_mbus_framefmt fmt;
 398
 399                 /*
 400                  * FIXME: sensor supports resolutions up to 1600x1200, but
 401                  * resolution setting/switching needs to be modified to
 402                  * - switch sensor output resolution (including further
 403                  *   configuration changes)
 404                  * - adjust bridge xclk
 405                  * - disable 16 bit (12 bit) output formats on high resolutions
 406                  */
 407                 dev->sensor_xres = 640;
 408                 dev->sensor_yres = 480;
 409
 410                 subdev =
 411                      v4l2_i2c_new_subdev_board(&dev->v4l2_dev,
 412                                                &dev->i2c_adap[dev->def_i2c_bus],
 413                                                &ov2640_info, NULL);
 414
 415                 fmt.code = V4L2_MBUS_FMT_YUYV8_2X8;
 416                 fmt.width = 640;
 417                 fmt.height = 480;
 418                 v4l2_subdev_call(subdev, video, s_mbus_fmt, &fmt);
 419
 420                 /* NOTE: for UXGA=1600x1200 switch to 12MHz */
 421                 dev->board.xclk = EM28XX_XCLK_FREQUENCY_24MHZ;
 422                 em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
 423                 dev->vinmode = 0x08;
 424                 dev->vinctl = 0x00;
 425
 426                 break;
 427         }
 428         case EM28XX_NOSENSOR:
 429         default:
 430                 return -EINVAL;
 431         }
 432
 433         return 0;
 434 }