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 ®s[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 ®s[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, ®, 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, ®, 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 } 435