diff options
Diffstat (limited to 'drivers/media/usb/em28xx/em28xx-camera.c')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-camera.c | 434 |
1 files changed, 434 insertions, 0 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-camera.c b/drivers/media/usb/em28xx/em28xx-camera.c new file mode 100644 index 0000000..73cc50a --- /dev/null +++ b/drivers/media/usb/em28xx/em28xx-camera.c @@ -0,0 +1,434 @@ +/* + em28xx-camera.c - driver for Empia EM25xx/27xx/28xx USB video capture devices + + Copyright (C) 2009 Mauro Carvalho Chehab <mchehab@infradead.org> + Copyright (C) 2013 Frank Schäfer <fschaefer.oss@googlemail.com> + + 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 <linux/i2c.h> +#include <media/soc_camera.h> +#include <media/mt9v011.h> +#include <media/v4l2-common.h> + +#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", +}; + + +/* 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 != -ENODEV) + 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 != -ENODEV) + 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) +{ + switch (dev->em28xx_sensor) { + case EM28XX_MT9V011: + { + struct mt9v011_platform_data pdata; + struct i2c_board_info mt9v011_info = { + .type = "mt9v011", + .addr = dev->i2c_client[dev->def_i2c_bus].addr, + .platform_data = &pdata, + }; + + dev->sensor_xres = 640; + dev->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); + dev->sensor_xtal = 4300000; + pdata.xtal = dev->sensor_xtal; + if (NULL == + v4l2_i2c_new_subdev_board(&dev->v4l2_dev, + &dev->i2c_adap[dev->def_i2c_bus], + &mt9v011_info, NULL)) + return -ENODEV; + /* probably means GRGB 16 bit bayer */ + dev->vinmode = 0x0d; + dev->vinctl = 0x00; + + break; + } + case EM28XX_MT9M001: + dev->sensor_xres = 1280; + dev->sensor_yres = 1024; + + em28xx_initialize_mt9m001(dev); + + /* probably means BGGR 16 bit bayer */ + dev->vinmode = 0x0c; + dev->vinctl = 0x00; + + break; + case EM28XX_MT9M111: + dev->sensor_xres = 640; + dev->sensor_yres = 512; + + dev->board.xclk = EM28XX_XCLK_FREQUENCY_48MHZ; + em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk); + em28xx_initialize_mt9m111(dev); + + dev->vinmode = 0x0a; + dev->vinctl = 0x00; + + break; + case EM28XX_OV2640: + { + struct v4l2_subdev *subdev; + struct i2c_board_info ov2640_info = { + .type = "ov2640", + .flags = I2C_CLIENT_SCCB, + .addr = dev->i2c_client[dev->def_i2c_bus].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 + */ + dev->sensor_xres = 640; + dev->sensor_yres = 480; + + subdev = + v4l2_i2c_new_subdev_board(&dev->v4l2_dev, + &dev->i2c_adap[dev->def_i2c_bus], + &ov2640_info, NULL); + + 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); + dev->vinmode = 0x08; + dev->vinctl = 0x00; + + break; + } + case EM28XX_NOSENSOR: + default: + return -EINVAL; + } + + return 0; +} |