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 ®s[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 ®s[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); 413