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 ®s[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 ®s[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, ®, 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, ®, 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); 460