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/* Possible i2c addresses of Micron sensors */ 31static 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 */ 39static 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 45static 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 */ 53static 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 return 0; 68} 69 70/* FIXME: Should be replaced by a proper mt9m001 driver */ 71static int em28xx_initialize_mt9m001(struct em28xx *dev) 72{ 73 int i; 74 unsigned char regs[][3] = { 75 { 0x0d, 0x00, 0x01, }, 76 { 0x0d, 0x00, 0x00, }, 77 { 0x04, 0x05, 0x00, }, /* hres = 1280 */ 78 { 0x03, 0x04, 0x00, }, /* vres = 1024 */ 79 { 0x20, 0x11, 0x00, }, 80 { 0x06, 0x00, 0x10, }, 81 { 0x2b, 0x00, 0x24, }, 82 { 0x2e, 0x00, 0x24, }, 83 { 0x35, 0x00, 0x24, }, 84 { 0x2d, 0x00, 0x20, }, 85 { 0x2c, 0x00, 0x20, }, 86 { 0x09, 0x0a, 0xd4, }, 87 { 0x35, 0x00, 0x57, }, 88 }; 89 90 for (i = 0; i < ARRAY_SIZE(regs); i++) 91 i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], 92 ®s[i][0], 3); 93 94 return 0; 95} 96 97/* 98 * Probes Micron sensors with 8 bit address and 16 bit register width 99 */ 100static int em28xx_probe_sensor_micron(struct em28xx *dev) 101{ 102 int ret, i; 103 char *name; 104 u8 reg; 105 __be16 id_be; 106 u16 id; 107 108 struct i2c_client client = dev->i2c_client[dev->def_i2c_bus]; 109 110 dev->em28xx_sensor = EM28XX_NOSENSOR; 111 for (i = 0; micron_sensor_addrs[i] != I2C_CLIENT_END; i++) { 112 client.addr = micron_sensor_addrs[i]; 113 /* NOTE: i2c_smbus_read_word_data() doesn't work with BE data */ 114 /* Read chip ID from register 0x00 */ 115 reg = 0x00; 116 ret = i2c_master_send(&client, ®, 1); 117 if (ret < 0) { 118 if (ret != -ENXIO) 119 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 120 client.addr << 1, ret); 121 continue; 122 } 123 ret = i2c_master_recv(&client, (u8 *)&id_be, 2); 124 if (ret < 0) { 125 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 126 client.addr << 1, ret); 127 continue; 128 } 129 id = be16_to_cpu(id_be); 130 /* Read chip ID from register 0xff */ 131 reg = 0xff; 132 ret = i2c_master_send(&client, ®, 1); 133 if (ret < 0) { 134 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 135 client.addr << 1, ret); 136 continue; 137 } 138 ret = i2c_master_recv(&client, (u8 *)&id_be, 2); 139 if (ret < 0) { 140 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 141 client.addr << 1, ret); 142 continue; 143 } 144 /* Validate chip ID to be sure we have a Micron device */ 145 if (id != be16_to_cpu(id_be)) 146 continue; 147 /* Check chip ID */ 148 id = be16_to_cpu(id_be); 149 switch (id) { 150 case 0x1222: 151 name = "MT9V012"; /* MI370 */ /* 640x480 */ 152 break; 153 case 0x1229: 154 name = "MT9V112"; /* 640x480 */ 155 break; 156 case 0x1433: 157 name = "MT9M011"; /* 1280x1024 */ 158 break; 159 case 0x143a: /* found in the ECS G200 */ 160 name = "MT9M111"; /* MI1310 */ /* 1280x1024 */ 161 dev->em28xx_sensor = EM28XX_MT9M111; 162 break; 163 case 0x148c: 164 name = "MT9M112"; /* MI1320 */ /* 1280x1024 */ 165 break; 166 case 0x1511: 167 name = "MT9D011"; /* MI2010 */ /* 1600x1200 */ 168 break; 169 case 0x8232: 170 case 0x8243: /* rev B */ 171 name = "MT9V011"; /* MI360 */ /* 640x480 */ 172 dev->em28xx_sensor = EM28XX_MT9V011; 173 break; 174 case 0x8431: 175 name = "MT9M001"; /* 1280x1024 */ 176 dev->em28xx_sensor = EM28XX_MT9M001; 177 break; 178 default: 179 em28xx_info("unknown Micron sensor detected: 0x%04x\n", 180 id); 181 return 0; 182 } 183 184 if (dev->em28xx_sensor == EM28XX_NOSENSOR) 185 em28xx_info("unsupported sensor detected: %s\n", name); 186 else 187 em28xx_info("sensor %s detected\n", name); 188 189 dev->i2c_client[dev->def_i2c_bus].addr = client.addr; 190 return 0; 191 } 192 193 return -ENODEV; 194} 195 196/* 197 * Probes Omnivision sensors with 8 bit address and register width 198 */ 199static int em28xx_probe_sensor_omnivision(struct em28xx *dev) 200{ 201 int ret, i; 202 char *name; 203 u8 reg; 204 u16 id; 205 struct i2c_client client = dev->i2c_client[dev->def_i2c_bus]; 206 207 dev->em28xx_sensor = EM28XX_NOSENSOR; 208 /* NOTE: these devices have the register auto incrementation disabled 209 * by default, so we have to use single byte reads ! */ 210 for (i = 0; omnivision_sensor_addrs[i] != I2C_CLIENT_END; i++) { 211 client.addr = omnivision_sensor_addrs[i]; 212 /* Read manufacturer ID from registers 0x1c-0x1d (BE) */ 213 reg = 0x1c; 214 ret = i2c_smbus_read_byte_data(&client, reg); 215 if (ret < 0) { 216 if (ret != -ENXIO) 217 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 218 client.addr << 1, ret); 219 continue; 220 } 221 id = ret << 8; 222 reg = 0x1d; 223 ret = i2c_smbus_read_byte_data(&client, reg); 224 if (ret < 0) { 225 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 226 client.addr << 1, ret); 227 continue; 228 } 229 id += ret; 230 /* Check manufacturer ID */ 231 if (id != 0x7fa2) 232 continue; 233 /* Read product ID from registers 0x0a-0x0b (BE) */ 234 reg = 0x0a; 235 ret = i2c_smbus_read_byte_data(&client, reg); 236 if (ret < 0) { 237 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 238 client.addr << 1, ret); 239 continue; 240 } 241 id = ret << 8; 242 reg = 0x0b; 243 ret = i2c_smbus_read_byte_data(&client, reg); 244 if (ret < 0) { 245 em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", 246 client.addr << 1, ret); 247 continue; 248 } 249 id += ret; 250 /* Check product ID */ 251 switch (id) { 252 case 0x2642: 253 name = "OV2640"; 254 dev->em28xx_sensor = EM28XX_OV2640; 255 break; 256 case 0x7648: 257 name = "OV7648"; 258 break; 259 case 0x7660: 260 name = "OV7660"; 261 break; 262 case 0x7673: 263 name = "OV7670"; 264 break; 265 case 0x7720: 266 name = "OV7720"; 267 break; 268 case 0x7721: 269 name = "OV7725"; 270 break; 271 case 0x9648: /* Rev 2 */ 272 case 0x9649: /* Rev 3 */ 273 name = "OV9640"; 274 break; 275 case 0x9650: 276 case 0x9652: /* OV9653 */ 277 name = "OV9650"; 278 break; 279 case 0x9656: /* Rev 4 */ 280 case 0x9657: /* Rev 5 */ 281 name = "OV9655"; 282 break; 283 default: 284 em28xx_info("unknown OmniVision sensor detected: 0x%04x\n", 285 id); 286 return 0; 287 } 288 289 if (dev->em28xx_sensor == EM28XX_NOSENSOR) 290 em28xx_info("unsupported sensor detected: %s\n", name); 291 else 292 em28xx_info("sensor %s detected\n", name); 293 294 dev->i2c_client[dev->def_i2c_bus].addr = client.addr; 295 return 0; 296 } 297 298 return -ENODEV; 299} 300 301int em28xx_detect_sensor(struct em28xx *dev) 302{ 303 int ret; 304 305 ret = em28xx_probe_sensor_micron(dev); 306 307 if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) 308 ret = em28xx_probe_sensor_omnivision(dev); 309 310 /* 311 * NOTE: the Windows driver also probes i2c addresses 312 * 0x22 (Samsung ?) and 0x66 (Kodak ?) 313 */ 314 315 if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) { 316 em28xx_info("No sensor detected\n"); 317 return -ENODEV; 318 } 319 320 return 0; 321} 322 323int em28xx_init_camera(struct em28xx *dev) 324{ 325 char clk_name[V4L2_SUBDEV_NAME_SIZE]; 326 struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus]; 327 struct i2c_adapter *adap = &dev->i2c_adap[dev->def_i2c_bus]; 328 struct em28xx_v4l2 *v4l2 = dev->v4l2; 329 int ret = 0; 330 331 v4l2_clk_name_i2c(clk_name, sizeof(clk_name), 332 i2c_adapter_id(adap), client->addr); 333 v4l2->clk = v4l2_clk_register_fixed(clk_name, -EINVAL); 334 if (IS_ERR(v4l2->clk)) 335 return PTR_ERR(v4l2->clk); 336 337 switch (dev->em28xx_sensor) { 338 case EM28XX_MT9V011: 339 { 340 struct mt9v011_platform_data pdata; 341 struct i2c_board_info mt9v011_info = { 342 .type = "mt9v011", 343 .addr = client->addr, 344 .platform_data = &pdata, 345 }; 346 347 v4l2->sensor_xres = 640; 348 v4l2->sensor_yres = 480; 349 350 /* 351 * FIXME: mt9v011 uses I2S speed as xtal clk - at least with 352 * the Silvercrest cam I have here for testing - for higher 353 * resolutions, a high clock cause horizontal artifacts, so we 354 * need to use a lower xclk frequency. 355 * Yet, it would be possible to adjust xclk depending on the 356 * desired resolution, since this affects directly the 357 * frame rate. 358 */ 359 dev->board.xclk = EM28XX_XCLK_FREQUENCY_4_3MHZ; 360 em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk); 361 v4l2->sensor_xtal = 4300000; 362 pdata.xtal = v4l2->sensor_xtal; 363 if (NULL == 364 v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap, 365 &mt9v011_info, NULL)) { 366 ret = -ENODEV; 367 break; 368 } 369 /* probably means GRGB 16 bit bayer */ 370 v4l2->vinmode = 0x0d; 371 v4l2->vinctl = 0x00; 372 373 break; 374 } 375 case EM28XX_MT9M001: 376 v4l2->sensor_xres = 1280; 377 v4l2->sensor_yres = 1024; 378 379 em28xx_initialize_mt9m001(dev); 380 381 /* probably means BGGR 16 bit bayer */ 382 v4l2->vinmode = 0x0c; 383 v4l2->vinctl = 0x00; 384 385 break; 386 case EM28XX_MT9M111: 387 v4l2->sensor_xres = 640; 388 v4l2->sensor_yres = 512; 389 390 dev->board.xclk = EM28XX_XCLK_FREQUENCY_48MHZ; 391 em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk); 392 em28xx_initialize_mt9m111(dev); 393 394 v4l2->vinmode = 0x0a; 395 v4l2->vinctl = 0x00; 396 397 break; 398 case EM28XX_OV2640: 399 { 400 struct v4l2_subdev *subdev; 401 struct i2c_board_info ov2640_info = { 402 .type = "ov2640", 403 .flags = I2C_CLIENT_SCCB, 404 .addr = client->addr, 405 .platform_data = &camlink, 406 }; 407 struct v4l2_mbus_framefmt fmt; 408 409 /* 410 * FIXME: sensor supports resolutions up to 1600x1200, but 411 * resolution setting/switching needs to be modified to 412 * - switch sensor output resolution (including further 413 * configuration changes) 414 * - adjust bridge xclk 415 * - disable 16 bit (12 bit) output formats on high resolutions 416 */ 417 v4l2->sensor_xres = 640; 418 v4l2->sensor_yres = 480; 419 420 subdev = 421 v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap, 422 &ov2640_info, NULL); 423 if (NULL == subdev) { 424 ret = -ENODEV; 425 break; 426 } 427 428 fmt.code = MEDIA_BUS_FMT_YUYV8_2X8; 429 fmt.width = 640; 430 fmt.height = 480; 431 v4l2_subdev_call(subdev, video, s_mbus_fmt, &fmt); 432 433 /* NOTE: for UXGA=1600x1200 switch to 12MHz */ 434 dev->board.xclk = EM28XX_XCLK_FREQUENCY_24MHZ; 435 em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk); 436 v4l2->vinmode = 0x08; 437 v4l2->vinctl = 0x00; 438 439 break; 440 } 441 case EM28XX_NOSENSOR: 442 default: 443 ret = -EINVAL; 444 } 445 446 if (ret < 0) { 447 v4l2_clk_unregister_fixed(v4l2->clk); 448 v4l2->clk = NULL; 449 } 450 451 return ret; 452} 453EXPORT_SYMBOL_GPL(em28xx_init_camera); 454