413 lines · c
1// SPDX-License-Identifier: GPL-2.0+2//3// em28xx-camera.c - driver for Empia EM25xx/27xx/28xx USB video capture devices4//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 */16static 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_END21};22 23/* Possible i2c addresses of Omnivision sensors */24static unsigned short omnivision_sensor_addrs[] = {25 0x42 >> 1, /* OV7725, OV7670/60/48 */26 0x60 >> 1, /* OV2640, OV9650/53/55 */27 I2C_CLIENT_END28};29 30/* FIXME: Should be replaced by a proper mt9m111 driver */31static 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 */51static 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 width81 */82static 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 else155 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 width166 */167static 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 disabled178 * 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 else268 dev_info(&dev->intf->dev,269 "sensor %s detected\n", name);270 271 return 0;272 }273 274 return -ENODEV;275}276 277int 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 addresses288 * 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 300int 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 with321 * the Silvercrest cam I have here for testing - for higher322 * resolutions, a high clock cause horizontal artifacts, so we323 * need to use a lower xclk frequency.324 * Yet, it would be possible to adjust xclk depending on the325 * desired resolution, since this affects directly the326 * 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, but377 * resolution setting/switching needs to be modified to378 * - switch sensor output resolution (including further379 * configuration changes)380 * - adjust bridge xclk381 * - disable 16 bit (12 bit) output formats on high resolutions382 */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}412EXPORT_SYMBOL_GPL(em28xx_init_camera);413