/* em28xx-camera.c - driver for Empia EM25xx/27xx/28xx USB video capture devices Copyright (C) 2009 Mauro Carvalho Chehab Copyright (C) 2013 Frank Schäfer This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include "em28xx.h" /* Possible i2c addresses of Micron sensors */ static unsigned short micron_sensor_addrs[] = { 0xb8 >> 1, /* MT9V111, MT9V403 */ 0xba >> 1, /* MT9M001/011/111/112, MT9V011/012/112, MT9D011 */ 0x90 >> 1, /* MT9V012/112, MT9D011 (alternative address) */ I2C_CLIENT_END }; /* Possible i2c addresses of Omnivision sensors */ static unsigned short omnivision_sensor_addrs[] = { 0x42 >> 1, /* OV7725, OV7670/60/48 */ 0x60 >> 1, /* OV2640, OV9650/53/55 */ I2C_CLIENT_END }; static struct soc_camera_link camlink = { .bus_id = 0, .flags = 0, .module_name = "em28xx", .unbalanced_power = true, }; /* FIXME: Should be replaced by a proper mt9m111 driver */ static int em28xx_initialize_mt9m111(struct em28xx *dev) { int i; unsigned char regs[][3] = { { 0x0d, 0x00, 0x01, }, /* reset and use defaults */ { 0x0d, 0x00, 0x00, }, { 0x0a, 0x00, 0x21, }, { 0x21, 0x04, 0x00, }, /* full readout speed, no row/col skipping */ }; for (i = 0; i < ARRAY_SIZE(regs); i++) i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], ®s[i][0], 3); return 0; } /* FIXME: Should be replaced by a proper mt9m001 driver */ static int em28xx_initialize_mt9m001(struct em28xx *dev) { int i; unsigned char regs[][3] = { { 0x0d, 0x00, 0x01, }, { 0x0d, 0x00, 0x00, }, { 0x04, 0x05, 0x00, }, /* hres = 1280 */ { 0x03, 0x04, 0x00, }, /* vres = 1024 */ { 0x20, 0x11, 0x00, }, { 0x06, 0x00, 0x10, }, { 0x2b, 0x00, 0x24, }, { 0x2e, 0x00, 0x24, }, { 0x35, 0x00, 0x24, }, { 0x2d, 0x00, 0x20, }, { 0x2c, 0x00, 0x20, }, { 0x09, 0x0a, 0xd4, }, { 0x35, 0x00, 0x57, }, }; for (i = 0; i < ARRAY_SIZE(regs); i++) i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], ®s[i][0], 3); return 0; } /* * Probes Micron sensors with 8 bit address and 16 bit register width */ static int em28xx_probe_sensor_micron(struct em28xx *dev) { int ret, i; char *name; u8 reg; __be16 id_be; u16 id; struct i2c_client client = dev->i2c_client[dev->def_i2c_bus]; dev->em28xx_sensor = EM28XX_NOSENSOR; for (i = 0; micron_sensor_addrs[i] != I2C_CLIENT_END; i++) { client.addr = micron_sensor_addrs[i]; /* NOTE: i2c_smbus_read_word_data() doesn't work with BE data */ /* Read chip ID from register 0x00 */ reg = 0x00; ret = i2c_master_send(&client, ®, 1); if (ret < 0) { if (ret != -ENXIO) em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", client.addr << 1, ret); continue; } ret = i2c_master_recv(&client, (u8 *)&id_be, 2); if (ret < 0) { em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", client.addr << 1, ret); continue; } id = be16_to_cpu(id_be); /* Read chip ID from register 0xff */ reg = 0xff; ret = i2c_master_send(&client, ®, 1); if (ret < 0) { em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", client.addr << 1, ret); continue; } ret = i2c_master_recv(&client, (u8 *)&id_be, 2); if (ret < 0) { em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", client.addr << 1, ret); continue; } /* Validate chip ID to be sure we have a Micron device */ if (id != be16_to_cpu(id_be)) continue; /* Check chip ID */ id = be16_to_cpu(id_be); switch (id) { case 0x1222: name = "MT9V012"; /* MI370 */ /* 640x480 */ break; case 0x1229: name = "MT9V112"; /* 640x480 */ break; case 0x1433: name = "MT9M011"; /* 1280x1024 */ break; case 0x143a: /* found in the ECS G200 */ name = "MT9M111"; /* MI1310 */ /* 1280x1024 */ dev->em28xx_sensor = EM28XX_MT9M111; break; case 0x148c: name = "MT9M112"; /* MI1320 */ /* 1280x1024 */ break; case 0x1511: name = "MT9D011"; /* MI2010 */ /* 1600x1200 */ break; case 0x8232: case 0x8243: /* rev B */ name = "MT9V011"; /* MI360 */ /* 640x480 */ dev->em28xx_sensor = EM28XX_MT9V011; break; case 0x8431: name = "MT9M001"; /* 1280x1024 */ dev->em28xx_sensor = EM28XX_MT9M001; break; default: em28xx_info("unknown Micron sensor detected: 0x%04x\n", id); return 0; } if (dev->em28xx_sensor == EM28XX_NOSENSOR) em28xx_info("unsupported sensor detected: %s\n", name); else em28xx_info("sensor %s detected\n", name); dev->i2c_client[dev->def_i2c_bus].addr = client.addr; return 0; } return -ENODEV; } /* * Probes Omnivision sensors with 8 bit address and register width */ static int em28xx_probe_sensor_omnivision(struct em28xx *dev) { int ret, i; char *name; u8 reg; u16 id; struct i2c_client client = dev->i2c_client[dev->def_i2c_bus]; dev->em28xx_sensor = EM28XX_NOSENSOR; /* NOTE: these devices have the register auto incrementation disabled * by default, so we have to use single byte reads ! */ for (i = 0; omnivision_sensor_addrs[i] != I2C_CLIENT_END; i++) { client.addr = omnivision_sensor_addrs[i]; /* Read manufacturer ID from registers 0x1c-0x1d (BE) */ reg = 0x1c; ret = i2c_smbus_read_byte_data(&client, reg); if (ret < 0) { if (ret != -ENXIO) em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", client.addr << 1, ret); continue; } id = ret << 8; reg = 0x1d; ret = i2c_smbus_read_byte_data(&client, reg); if (ret < 0) { em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", client.addr << 1, ret); continue; } id += ret; /* Check manufacturer ID */ if (id != 0x7fa2) continue; /* Read product ID from registers 0x0a-0x0b (BE) */ reg = 0x0a; ret = i2c_smbus_read_byte_data(&client, reg); if (ret < 0) { em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", client.addr << 1, ret); continue; } id = ret << 8; reg = 0x0b; ret = i2c_smbus_read_byte_data(&client, reg); if (ret < 0) { em28xx_errdev("couldn't read from i2c device 0x%02x: error %i\n", client.addr << 1, ret); continue; } id += ret; /* Check product ID */ switch (id) { case 0x2642: name = "OV2640"; dev->em28xx_sensor = EM28XX_OV2640; break; case 0x7648: name = "OV7648"; break; case 0x7660: name = "OV7660"; break; case 0x7673: name = "OV7670"; break; case 0x7720: name = "OV7720"; break; case 0x7721: name = "OV7725"; break; case 0x9648: /* Rev 2 */ case 0x9649: /* Rev 3 */ name = "OV9640"; break; case 0x9650: case 0x9652: /* OV9653 */ name = "OV9650"; break; case 0x9656: /* Rev 4 */ case 0x9657: /* Rev 5 */ name = "OV9655"; break; default: em28xx_info("unknown OmniVision sensor detected: 0x%04x\n", id); return 0; } if (dev->em28xx_sensor == EM28XX_NOSENSOR) em28xx_info("unsupported sensor detected: %s\n", name); else em28xx_info("sensor %s detected\n", name); dev->i2c_client[dev->def_i2c_bus].addr = client.addr; return 0; } return -ENODEV; } int em28xx_detect_sensor(struct em28xx *dev) { int ret; ret = em28xx_probe_sensor_micron(dev); if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) ret = em28xx_probe_sensor_omnivision(dev); /* * NOTE: the Windows driver also probes i2c addresses * 0x22 (Samsung ?) and 0x66 (Kodak ?) */ if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) { em28xx_info("No sensor detected\n"); return -ENODEV; } return 0; } int em28xx_init_camera(struct em28xx *dev) { char clk_name[V4L2_SUBDEV_NAME_SIZE]; struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus]; struct i2c_adapter *adap = &dev->i2c_adap[dev->def_i2c_bus]; struct em28xx_v4l2 *v4l2 = dev->v4l2; int ret = 0; v4l2_clk_name_i2c(clk_name, sizeof(clk_name), i2c_adapter_id(adap), client->addr); v4l2->clk = v4l2_clk_register_fixed(clk_name, "mclk", -EINVAL); if (IS_ERR(v4l2->clk)) return PTR_ERR(v4l2->clk); switch (dev->em28xx_sensor) { case EM28XX_MT9V011: { struct mt9v011_platform_data pdata; struct i2c_board_info mt9v011_info = { .type = "mt9v011", .addr = client->addr, .platform_data = &pdata, }; v4l2->sensor_xres = 640; v4l2->sensor_yres = 480; /* * FIXME: mt9v011 uses I2S speed as xtal clk - at least with * the Silvercrest cam I have here for testing - for higher * resolutions, a high clock cause horizontal artifacts, so we * need to use a lower xclk frequency. * Yet, it would be possible to adjust xclk depending on the * desired resolution, since this affects directly the * frame rate. */ dev->board.xclk = EM28XX_XCLK_FREQUENCY_4_3MHZ; em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk); v4l2->sensor_xtal = 4300000; pdata.xtal = v4l2->sensor_xtal; if (NULL == v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap, &mt9v011_info, NULL)) { ret = -ENODEV; break; } /* probably means GRGB 16 bit bayer */ v4l2->vinmode = 0x0d; v4l2->vinctl = 0x00; break; } case EM28XX_MT9M001: v4l2->sensor_xres = 1280; v4l2->sensor_yres = 1024; em28xx_initialize_mt9m001(dev); /* probably means BGGR 16 bit bayer */ v4l2->vinmode = 0x0c; v4l2->vinctl = 0x00; break; case EM28XX_MT9M111: v4l2->sensor_xres = 640; v4l2->sensor_yres = 512; dev->board.xclk = EM28XX_XCLK_FREQUENCY_48MHZ; em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk); em28xx_initialize_mt9m111(dev); v4l2->vinmode = 0x0a; v4l2->vinctl = 0x00; break; case EM28XX_OV2640: { struct v4l2_subdev *subdev; struct i2c_board_info ov2640_info = { .type = "ov2640", .flags = I2C_CLIENT_SCCB, .addr = client->addr, .platform_data = &camlink, }; struct v4l2_mbus_framefmt fmt; /* * FIXME: sensor supports resolutions up to 1600x1200, but * resolution setting/switching needs to be modified to * - switch sensor output resolution (including further * configuration changes) * - adjust bridge xclk * - disable 16 bit (12 bit) output formats on high resolutions */ v4l2->sensor_xres = 640; v4l2->sensor_yres = 480; subdev = v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap, &ov2640_info, NULL); if (NULL == subdev) { ret = -ENODEV; break; } fmt.code = V4L2_MBUS_FMT_YUYV8_2X8; fmt.width = 640; fmt.height = 480; v4l2_subdev_call(subdev, video, s_mbus_fmt, &fmt); /* NOTE: for UXGA=1600x1200 switch to 12MHz */ dev->board.xclk = EM28XX_XCLK_FREQUENCY_24MHZ; em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk); v4l2->vinmode = 0x08; v4l2->vinctl = 0x00; break; } case EM28XX_NOSENSOR: default: ret = -EINVAL; } if (ret < 0) { v4l2_clk_unregister_fixed(v4l2->clk); v4l2->clk = NULL; } return ret; } EXPORT_SYMBOL_GPL(em28xx_init_camera);