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-clk.h> 26 #include <media/v4l2-common.h> 27 28 #include "em28xx.h" 29 30 31 /* Possible i2c addresses of Micron sensors */ 32 static unsigned short micron_sensor_addrs[] = { 33 0xb8 >> 1, /* MT9V111, MT9V403 */ 34 0xba >> 1, /* MT9M001/011/111/112, MT9V011/012/112, MT9D011 */ 35 0x90 >> 1, /* MT9V012/112, MT9D011 (alternative address) */ 36 I2C_CLIENT_END 37 }; 38 39 /* Possible i2c addresses of Omnivision sensors */ 40 static unsigned short omnivision_sensor_addrs[] = { 41 0x42 >> 1, /* OV7725, OV7670/60/48 */ 42 0x60 >> 1, /* OV2640, OV9650/53/55 */ 43 I2C_CLIENT_END 44 }; 45 46 47 static struct soc_camera_link camlink = { 48 .bus_id = 0, 49 .flags = 0, 50 .module_name = "em28xx", 51 .unbalanced_power = true, 52 }; 53 54 55 /* FIXME: Should be replaced by a proper mt9m111 driver */ 56 static int em28xx_initialize_mt9m111(struct em28xx *dev) 57 { 58 int i; 59 unsigned char regs[][3] = { 60 { 0x0d, 0x00, 0x01, }, /* reset and use defaults */ 61 { 0x0d, 0x00, 0x00, }, 62 { 0x0a, 0x00, 0x21, }, 63 { 0x21, 0x04, 0x00, }, /* full readout speed, no row/col skipping */ 64 }; 65 66 for (i = 0; i < ARRAY_SIZE(regs); i++) 67 i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], 68 ®s[i][0], 3); 69 70 return 0; 71 } 72 73 74 /* FIXME: Should be replaced by a proper mt9m001 driver */ 75 static int em28xx_initialize_mt9m001(struct em28xx *dev) 76 { 77 int i; 78 unsigned char regs[][3] = { 79 { 0x0d, 0x00, 0x01, }, 80 { 0x0d, 0x00, 0x00, }, 81 { 0x04, 0x05, 0x00, }, /* hres = 1280 */ 82 { 0x03, 0x04, 0x00, }, /* vres = 1024 */ 83 { 0x20, 0x11, 0x00, }, 84 { 0x06, 0x00, 0x10, }, 85 { 0x2b, 0x00, 0x24, }, 86 { 0x2e, 0x00, 0x24, }, 87 { 0x35, 0x00, 0x24, }, 88 { 0x2d, 0x00, 0x20, }, 89 { 0x2c, 0x00, 0x20, }, 90 { 0x09, 0x0a, 0xd4, }, 91 { 0x35, 0x00, 0x57, }, 92 }; 93 94 for (i = 0; i < ARRAY_SIZE(regs); i++) 95 i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], 96 ®s[i][0], 3); 97 98 return 0; 99 } 100 101 102 /* 103 * Probes Micron sensors with 8 bit address and 16 bit register width 104 */ 105 static int em28xx_probe_sensor_micron(struct em28xx *dev) 106 { 107 int ret, i; 108 char *name; 109 u8 reg; 110 __be16 id_be; 111 u16 id; 112 113 struct i2c_client client = dev->i2c_client[dev->def_i2c_bus]; 114 115 dev->em28xx_sensor = EM28XX_NOSENSOR; 116 for (i = 0; micron_sensor_addrs[i] != I2C_CLIENT_END; i++) { 117 client.addr = micron_sensor_addrs[i]; 118 /* NOTE: i2c_smbus_read_word_data() doesn't work with BE data */ 119 /* Read chip ID from register 0x00 */ 120 reg = 0x00; 121 ret = i2c_master_send(&client, ®, 1); 122 if (ret < 0) { 123 if (ret != -ENXIO) 124 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 125 client.addr << 1, ret); 126 continue; 127 } 128 ret = i2c_master_recv(&client, (u8 *)&id_be, 2); 129 if (ret < 0) { 130 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 131 client.addr << 1, ret); 132 continue; 133 } 134 id = be16_to_cpu(id_be); 135 /* Read chip ID from register 0xff */ 136 reg = 0xff; 137 ret = i2c_master_send(&client, ®, 1); 138 if (ret < 0) { 139 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 140 client.addr << 1, ret); 141 continue; 142 } 143 ret = i2c_master_recv(&client, (u8 *)&id_be, 2); 144 if (ret < 0) { 145 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 146 client.addr << 1, ret); 147 continue; 148 } 149 /* Validate chip ID to be sure we have a Micron device */ 150 if (id != be16_to_cpu(id_be)) 151 continue; 152 /* Check chip ID */ 153 id = be16_to_cpu(id_be); 154 switch (id) { 155 case 0x1222: 156 name = "MT9V012"; /* MI370 */ /* 640x480 */ 157 break; 158 case 0x1229: 159 name = "MT9V112"; /* 640x480 */ 160 break; 161 case 0x1433: 162 name = "MT9M011"; /* 1280x1024 */ 163 break; 164 case 0x143a: /* found in the ECS G200 */ 165 name = "MT9M111"; /* MI1310 */ /* 1280x1024 */ 166 dev->em28xx_sensor = EM28XX_MT9M111; 167 break; 168 case 0x148c: 169 name = "MT9M112"; /* MI1320 */ /* 1280x1024 */ 170 break; 171 case 0x1511: 172 name = "MT9D011"; /* MI2010 */ /* 1600x1200 */ 173 break; 174 case 0x8232: 175 case 0x8243: /* rev B */ 176 name = "MT9V011"; /* MI360 */ /* 640x480 */ 177 dev->em28xx_sensor = EM28XX_MT9V011; 178 break; 179 case 0x8431: 180 name = "MT9M001"; /* 1280x1024 */ 181 dev->em28xx_sensor = EM28XX_MT9M001; 182 break; 183 default: 184 em28xx_info("unknown Micron sensor detected: 0x%04x\n", 185 id); 186 return 0; 187 } 188 189 if (dev->em28xx_sensor == EM28XX_NOSENSOR) 190 em28xx_info("unsupported sensor detected: %s\n", name); 191 else 192 em28xx_info("sensor %s detected\n", name); 193 194 dev->i2c_client[dev->def_i2c_bus].addr = client.addr; 195 return 0; 196 } 197 198 return -ENODEV; 199 } 200 201 /* 202 * Probes Omnivision sensors with 8 bit address and register width 203 */ 204 static int em28xx_probe_sensor_omnivision(struct em28xx *dev) 205 { 206 int ret, i; 207 char *name; 208 u8 reg; 209 u16 id; 210 struct i2c_client client = dev->i2c_client[dev->def_i2c_bus]; 211 212 dev->em28xx_sensor = EM28XX_NOSENSOR; 213 /* NOTE: these devices have the register auto incrementation disabled 214 * by default, so we have to use single byte reads ! */ 215 for (i = 0; omnivision_sensor_addrs[i] != I2C_CLIENT_END; i++) { 216 client.addr = omnivision_sensor_addrs[i]; 217 /* Read manufacturer ID from registers 0x1c-0x1d (BE) */ 218 reg = 0x1c; 219 ret = i2c_smbus_read_byte_data(&client, reg); 220 if (ret < 0) { 221 if (ret != -ENXIO) 222 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 223 client.addr << 1, ret); 224 continue; 225 } 226 id = ret << 8; 227 reg = 0x1d; 228 ret = i2c_smbus_read_byte_data(&client, reg); 229 if (ret < 0) { 230 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 231 client.addr << 1, ret); 232 continue; 233 } 234 id += ret; 235 /* Check manufacturer ID */ 236 if (id != 0x7fa2) 237 continue; 238 /* Read product ID from registers 0x0a-0x0b (BE) */ 239 reg = 0x0a; 240 ret = i2c_smbus_read_byte_data(&client, reg); 241 if (ret < 0) { 242 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 243 client.addr << 1, ret); 244 continue; 245 } 246 id = ret << 8; 247 reg = 0x0b; 248 ret = i2c_smbus_read_byte_data(&client, reg); 249 if (ret < 0) { 250 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 251 client.addr << 1, ret); 252 continue; 253 } 254 id += ret; 255 /* Check product ID */ 256 switch (id) { 257 case 0x2642: 258 name = "OV2640"; 259 dev->em28xx_sensor = EM28XX_OV2640; 260 break; 261 case 0x7648: 262 name = "OV7648"; 263 break; 264 case 0x7660: 265 name = "OV7660"; 266 break; 267 case 0x7673: 268 name = "OV7670"; 269 break; 270 case 0x7720: 271 name = "OV7720"; 272 break; 273 case 0x7721: 274 name = "OV7725"; 275 break; 276 case 0x9648: /* Rev 2 */ 277 case 0x9649: /* Rev 3 */ 278 name = "OV9640"; 279 break; 280 case 0x9650: 281 case 0x9652: /* OV9653 */ 282 name = "OV9650"; 283 break; 284 case 0x9656: /* Rev 4 */ 285 case 0x9657: /* Rev 5 */ 286 name = "OV9655"; 287 break; 288 default: 289 em28xx_info("unknown OmniVision sensor detected: 0x%04x\n", 290 id); 291 return 0; 292 } 293 294 if (dev->em28xx_sensor == EM28XX_NOSENSOR) 295 em28xx_info("unsupported sensor detected: %s\n", name); 296 else 297 em28xx_info("sensor %s detected\n", name); 298 299 dev->i2c_client[dev->def_i2c_bus].addr = client.addr; 300 return 0; 301 } 302 303 return -ENODEV; 304 } 305 306 int em28xx_detect_sensor(struct em28xx *dev) 307 { 308 int ret; 309 310 ret = em28xx_probe_sensor_micron(dev); 311 312 if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) 313 ret = em28xx_probe_sensor_omnivision(dev); 314 315 /* 316 * NOTE: the Windows driver also probes i2c addresses 317 * 0x22 (Samsung ?) and 0x66 (Kodak ?) 318 */ 319 320 if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) { 321 em28xx_info("No sensor detected\n"); 322 return -ENODEV; 323 } 324 325 return 0; 326 } 327 328 int em28xx_init_camera(struct em28xx *dev) 329 { 330 char clk_name[V4L2_SUBDEV_NAME_SIZE]; 331 struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus]; 332 struct i2c_adapter *adap = &dev->i2c_adap[dev->def_i2c_bus]; 333 int ret = 0; 334 335 v4l2_clk_name_i2c(clk_name, sizeof(clk_name), 336 i2c_adapter_id(adap), client->addr); 337 dev->clk = v4l2_clk_register_fixed(clk_name, "mclk", -EINVAL); 338 if (IS_ERR(dev->clk)) 339 return PTR_ERR(dev->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 dev->sensor_xres = 640; 352 dev->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 dev->sensor_xtal = 4300000; 366 pdata.xtal = dev->sensor_xtal; 367 if (NULL == 368 v4l2_i2c_new_subdev_board(&dev->v4l2_dev, adap, 369 &mt9v011_info, NULL)) { 370 ret = -ENODEV; 371 break; 372 } 373 /* probably means GRGB 16 bit bayer */ 374 dev->vinmode = 0x0d; 375 dev->vinctl = 0x00; 376 377 break; 378 } 379 case EM28XX_MT9M001: 380 dev->sensor_xres = 1280; 381 dev->sensor_yres = 1024; 382 383 em28xx_initialize_mt9m001(dev); 384 385 /* probably means BGGR 16 bit bayer */ 386 dev->vinmode = 0x0c; 387 dev->vinctl = 0x00; 388 389 break; 390 case EM28XX_MT9M111: 391 dev->sensor_xres = 640; 392 dev->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 dev->vinmode = 0x0a; 399 dev->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_mbus_framefmt fmt; 412 413 /* 414 * FIXME: sensor supports resolutions up to 1600x1200, but 415 * resolution setting/switching needs to be modified to 416 * - switch sensor output resolution (including further 417 * configuration changes) 418 * - adjust bridge xclk 419 * - disable 16 bit (12 bit) output formats on high resolutions 420 */ 421 dev->sensor_xres = 640; 422 dev->sensor_yres = 480; 423 424 subdev = 425 v4l2_i2c_new_subdev_board(&dev->v4l2_dev, adap, 426 &ov2640_info, NULL); 427 if (NULL == subdev) { 428 ret = -ENODEV; 429 break; 430 } 431 432 fmt.code = V4L2_MBUS_FMT_YUYV8_2X8; 433 fmt.width = 640; 434 fmt.height = 480; 435 v4l2_subdev_call(subdev, video, s_mbus_fmt, &fmt); 436 437 /* NOTE: for UXGA=1600x1200 switch to 12MHz */ 438 dev->board.xclk = EM28XX_XCLK_FREQUENCY_24MHZ; 439 em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk); 440 dev->vinmode = 0x08; 441 dev->vinctl = 0x00; 442 443 break; 444 } 445 case EM28XX_NOSENSOR: 446 default: 447 ret = -EINVAL; 448 } 449 450 if (ret < 0) { 451 v4l2_clk_unregister_fixed(dev->clk); 452 dev->clk = NULL; 453 } 454 455 return ret; 456 } 457 EXPORT_SYMBOL_GPL(em28xx_init_camera); 458