| // SPDX-License-Identifier: GPL-2.0+ |
| // |
| // em28xx-camera.c - driver for Empia EM25xx/27xx/28xx USB video capture devices |
| // |
| // Copyright (C) 2009 Mauro Carvalho Chehab <mchehab@kernel.org> |
| // Copyright (C) 2013 Frank Schäfer <fschaefer.oss@googlemail.com> |
| |
| #include "em28xx.h" |
| |
| #include <linux/i2c.h> |
| #include <linux/usb.h> |
| #include <media/i2c/mt9v011.h> |
| #include <media/v4l2-common.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 |
| }; |
| |
| /* 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 spd, no row/col skip */ |
| }; |
| |
| for (i = 0; i < ARRAY_SIZE(regs); i++) |
| i2c_master_send(&dev->i2c_client[dev->def_i2c_bus], |
| ®s[i][0], 3); |
| |
| /* FIXME: This won't be creating a sensor at the media graph */ |
| |
| 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); |
| |
| /* FIXME: This won't be creating a sensor at the media graph */ |
| |
| 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; |
| 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]; |
| /* Read chip ID from register 0x00 */ |
| ret = i2c_smbus_read_word_data(client, 0x00); /* assumes LE */ |
| if (ret < 0) { |
| if (ret != -ENXIO) |
| dev_err(&dev->intf->dev, |
| "couldn't read from i2c device 0x%02x: error %i\n", |
| client->addr << 1, ret); |
| continue; |
| } |
| id = swab16(ret); /* LE -> BE */ |
| /* Read chip ID from register 0xff */ |
| ret = i2c_smbus_read_word_data(client, 0xff); |
| if (ret < 0) { |
| dev_err(&dev->intf->dev, |
| "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 != swab16(ret)) |
| continue; |
| /* Check chip ID */ |
| 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: |
| dev_info(&dev->intf->dev, |
| "unknown Micron sensor detected: 0x%04x\n", |
| id); |
| return 0; |
| } |
| |
| if (dev->em28xx_sensor == EM28XX_NOSENSOR) |
| dev_info(&dev->intf->dev, |
| "unsupported sensor detected: %s\n", name); |
| else |
| dev_info(&dev->intf->dev, |
| "sensor %s detected\n", name); |
| |
| 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) |
| dev_err(&dev->intf->dev, |
| "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) { |
| dev_err(&dev->intf->dev, |
| "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) { |
| dev_err(&dev->intf->dev, |
| "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) { |
| dev_err(&dev->intf->dev, |
| "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: |
| dev_info(&dev->intf->dev, |
| "unknown OmniVision sensor detected: 0x%04x\n", |
| id); |
| return 0; |
| } |
| |
| if (dev->em28xx_sensor == EM28XX_NOSENSOR) |
| dev_info(&dev->intf->dev, |
| "unsupported sensor detected: %s\n", name); |
| else |
| dev_info(&dev->intf->dev, |
| "sensor %s detected\n", name); |
| |
| 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) { |
| dev_info(&dev->intf->dev, |
| "No sensor detected\n"); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| int em28xx_init_camera(struct em28xx *dev) |
| { |
| 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; |
| |
| 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)) |
| return -ENODEV; |
| v4l2->vinmode = EM28XX_VINMODE_RGB8_GRBG; |
| v4l2->vinctl = 0x00; |
| |
| break; |
| } |
| case EM28XX_MT9M001: |
| v4l2->sensor_xres = 1280; |
| v4l2->sensor_yres = 1024; |
| |
| em28xx_initialize_mt9m001(dev); |
| |
| v4l2->vinmode = EM28XX_VINMODE_RGB8_BGGR; |
| 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 = EM28XX_VINMODE_YUV422_UYVY; |
| 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, |
| }; |
| struct v4l2_subdev_format format = { |
| .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
| }; |
| |
| /* |
| * 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 (!subdev) |
| return -ENODEV; |
| |
| format.format.code = MEDIA_BUS_FMT_YUYV8_2X8; |
| format.format.width = 640; |
| format.format.height = 480; |
| v4l2_subdev_call(subdev, pad, set_fmt, NULL, &format); |
| |
| /* 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 = EM28XX_VINMODE_YUV422_YUYV; |
| v4l2->vinctl = 0x00; |
| |
| break; |
| } |
| case EM28XX_NOSENSOR: |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(em28xx_init_camera); |
