diff options
Diffstat (limited to 'drivers/media/video/gspca/m5602/m5602_s5k4aa.c')
| -rw-r--r-- | drivers/media/video/gspca/m5602/m5602_s5k4aa.c | 463 |
1 files changed, 463 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/m5602/m5602_s5k4aa.c b/drivers/media/video/gspca/m5602/m5602_s5k4aa.c new file mode 100644 index 000000000000..68202565325d --- /dev/null +++ b/drivers/media/video/gspca/m5602/m5602_s5k4aa.c @@ -0,0 +1,463 @@ +/* + * Driver for the s5k4aa sensor + * + * Copyright (C) 2008 Erik Andren + * Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project. + * Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br> + * + * Portions of code to USB interface and ALi driver software, + * Copyright (c) 2006 Willem Duinker + * v4l2 interface modeled after the V4L2 driver + * for SN9C10x PC Camera Controllers + * + * 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, version 2. + * + */ + +#include "m5602_s5k4aa.h" + +int s5k4aa_probe(struct sd *sd) +{ + u8 prod_id[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; + const u8 expected_prod_id[6] = {0x00, 0x10, 0x00, 0x4b, 0x33, 0x75}; + int i, err = 0; + + if (force_sensor) { + if (force_sensor == S5K4AA_SENSOR) { + info("Forcing a %s sensor", s5k4aa.name); + goto sensor_found; + } + /* If we want to force another sensor, don't try to probe this + * one */ + return -ENODEV; + } + + info("Probing for a s5k4aa sensor"); + + /* Preinit the sensor */ + for (i = 0; i < ARRAY_SIZE(preinit_s5k4aa) && !err; i++) { + u8 data[2] = {0x00, 0x00}; + + switch (preinit_s5k4aa[i][0]) { + case BRIDGE: + err = m5602_write_bridge(sd, + preinit_s5k4aa[i][1], + preinit_s5k4aa[i][2]); + break; + + case SENSOR: + data[0] = preinit_s5k4aa[i][2]; + err = s5k4aa_write_sensor(sd, + preinit_s5k4aa[i][1], + data, 1); + break; + + case SENSOR_LONG: + data[0] = preinit_s5k4aa[i][2]; + data[1] = preinit_s5k4aa[i][3]; + err = s5k4aa_write_sensor(sd, + preinit_s5k4aa[i][1], + data, 2); + break; + default: + info("Invalid stream command, exiting init"); + return -EINVAL; + } + } + + /* Test some registers, but we don't know their exact meaning yet */ + if (s5k4aa_read_sensor(sd, 0x00, prod_id, sizeof(prod_id))) + return -ENODEV; + + if (memcmp(prod_id, expected_prod_id, sizeof(prod_id))) + return -ENODEV; + else + info("Detected a s5k4aa sensor"); +sensor_found: + sd->gspca_dev.cam.cam_mode = s5k4aa.modes; + sd->gspca_dev.cam.nmodes = s5k4aa.nmodes; + sd->desc->ctrls = s5k4aa.ctrls; + sd->desc->nctrls = s5k4aa.nctrls; + + return 0; +} + +int s5k4aa_read_sensor(struct sd *sd, const u8 address, + u8 *i2c_data, const u8 len) +{ + int err, i; + + do { + err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data); + } while ((*i2c_data & I2C_BUSY) && !err); + if (err < 0) + goto out; + + err = m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR, + sd->sensor->i2c_slave_id); + if (err < 0) + goto out; + + err = m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address); + if (err < 0) + goto out; + + err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x18 + len); + if (err < 0) + goto out; + + do { + err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data); + } while ((*i2c_data & I2C_BUSY) && !err); + if (err < 0) + goto out; + + for (i = 0; (i < len) & !err; i++) { + err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i])); + + PDEBUG(DBG_TRACE, "Reading sensor register " + "0x%x containing 0x%x ", address, *i2c_data); + } +out: + return (err < 0) ? err : 0; +} + +int s5k4aa_write_sensor(struct sd *sd, const u8 address, + u8 *i2c_data, const u8 len) +{ + int err, i; + u8 *p; + struct usb_device *udev = sd->gspca_dev.dev; + __u8 *buf = sd->gspca_dev.usb_buf; + + /* No sensor with a data width larger than 16 bits has yet been seen */ + if (len > 2 || !len) + return -EINVAL; + + memcpy(buf, sensor_urb_skeleton, + sizeof(sensor_urb_skeleton)); + + buf[11] = sd->sensor->i2c_slave_id; + buf[15] = address; + + /* Special case larger sensor writes */ + p = buf + 16; + + /* Copy a four byte write sequence for each byte to be written to */ + for (i = 0; i < len; i++) { + memcpy(p, sensor_urb_skeleton + 16, 4); + p[3] = i2c_data[i]; + p += 4; + PDEBUG(DBG_TRACE, "Writing sensor register 0x%x with 0x%x", + address, i2c_data[i]); + } + + /* Copy the tailer */ + memcpy(p, sensor_urb_skeleton + 20, 4); + + /* Set the total length */ + p[3] = 0x10 + len; + + err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), + 0x04, 0x40, 0x19, + 0x0000, buf, + 20 + len * 4, M5602_URB_MSG_TIMEOUT); + + return (err < 0) ? err : 0; +} + +int s5k4aa_init(struct sd *sd) +{ + int i, err = 0; + + for (i = 0; i < ARRAY_SIZE(init_s5k4aa) && !err; i++) { + u8 data[2] = {0x00, 0x00}; + + switch (init_s5k4aa[i][0]) { + case BRIDGE: + err = m5602_write_bridge(sd, + init_s5k4aa[i][1], + init_s5k4aa[i][2]); + break; + + case SENSOR: + data[0] = init_s5k4aa[i][2]; + err = s5k4aa_write_sensor(sd, + init_s5k4aa[i][1], data, 1); + break; + + case SENSOR_LONG: + data[0] = init_s5k4aa[i][2]; + data[1] = init_s5k4aa[i][3]; + err = s5k4aa_write_sensor(sd, + init_s5k4aa[i][1], data, 2); + break; + default: + info("Invalid stream command, exiting init"); + return -EINVAL; + } + } + + if (dump_sensor) + s5k4aa_dump_registers(sd); + + if (!err && dmi_check_system(s5k4aa_vflip_dmi_table)) { + u8 data = 0x02; + info("vertical flip quirk active"); + s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1); + s5k4aa_read_sensor(sd, S5K4AA_READ_MODE, &data, 1); + data |= S5K4AA_RM_V_FLIP; + data &= ~S5K4AA_RM_H_FLIP; + s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1); + + /* Decrement COLSTART to preserve color order (BGGR) */ + s5k4aa_read_sensor(sd, S5K4AA_COLSTART_LO, &data, 1); + data--; + s5k4aa_write_sensor(sd, S5K4AA_COLSTART_LO, &data, 1); + + /* Increment ROWSTART to preserve color order (BGGR) */ + s5k4aa_read_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1); + data++; + s5k4aa_write_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1); + } + + return (err < 0) ? err : 0; +} + +int s5k4aa_power_down(struct sd *sd) +{ + return 0; +} + +int s5k4aa_get_exposure(struct gspca_dev *gspca_dev, __s32 *val) +{ + struct sd *sd = (struct sd *) gspca_dev; + u8 data = S5K4AA_PAGE_MAP_2; + int err; + + err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1); + if (err < 0) + goto out; + + err = s5k4aa_read_sensor(sd, S5K4AA_EXPOSURE_HI, &data, 1); + if (err < 0) + goto out; + + *val = data << 8; + err = s5k4aa_read_sensor(sd, S5K4AA_EXPOSURE_LO, &data, 1); + *val |= data; + PDEBUG(DBG_V4L2_CID, "Read exposure %d", *val); +out: + return (err < 0) ? err : 0; +} + +int s5k4aa_set_exposure(struct gspca_dev *gspca_dev, __s32 val) +{ + struct sd *sd = (struct sd *) gspca_dev; + u8 data = S5K4AA_PAGE_MAP_2; + int err; + + PDEBUG(DBG_V4L2_CID, "Set exposure to %d", val); + err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1); + if (err < 0) + goto out; + data = (val >> 8) & 0xff; + err = s5k4aa_write_sensor(sd, S5K4AA_EXPOSURE_HI, &data, 1); + if (err < 0) + goto out; + data = val & 0xff; + err = s5k4aa_write_sensor(sd, S5K4AA_EXPOSURE_LO, &data, 1); +out: + return (err < 0) ? err : 0; +} + +int s5k4aa_get_vflip(struct gspca_dev *gspca_dev, __s32 *val) +{ + struct sd *sd = (struct sd *) gspca_dev; + u8 data = S5K4AA_PAGE_MAP_2; + int err; + + err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1); + if (err < 0) + goto out; + + err = s5k4aa_read_sensor(sd, S5K4AA_PAGE_MAP, &data, 1); + *val = (data & S5K4AA_RM_V_FLIP) >> 7; + PDEBUG(DBG_V4L2_CID, "Read vertical flip %d", *val); + +out: + return (err < 0) ? err : 0; +} + +int s5k4aa_set_vflip(struct gspca_dev *gspca_dev, __s32 val) +{ + struct sd *sd = (struct sd *) gspca_dev; + u8 data = S5K4AA_PAGE_MAP_2; + int err; + + PDEBUG(DBG_V4L2_CID, "Set vertical flip to %d", val); + err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1); + if (err < 0) + goto out; + err = s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1); + if (err < 0) + goto out; + data = ((data & ~S5K4AA_RM_V_FLIP) + | ((val & 0x01) << 7)); + err = s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1); + if (err < 0) + goto out; + + if (val) { + err = s5k4aa_read_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1); + if (err < 0) + goto out; + + data++; + err = s5k4aa_write_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1); + } else { + err = s5k4aa_read_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1); + if (err < 0) + goto out; + + data--; + err = s5k4aa_write_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1); + } +out: + return (err < 0) ? err : 0; +} + +int s5k4aa_get_hflip(struct gspca_dev *gspca_dev, __s32 *val) +{ + struct sd *sd = (struct sd *) gspca_dev; + u8 data = S5K4AA_PAGE_MAP_2; + int err; + + err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1); + if (err < 0) + goto out; + + err = s5k4aa_read_sensor(sd, S5K4AA_PAGE_MAP, &data, 1); + *val = (data & S5K4AA_RM_H_FLIP) >> 6; + PDEBUG(DBG_V4L2_CID, "Read horizontal flip %d", *val); +out: + return (err < 0) ? err : 0; +} + +int s5k4aa_set_hflip(struct gspca_dev *gspca_dev, __s32 val) +{ + struct sd *sd = (struct sd *) gspca_dev; + u8 data = S5K4AA_PAGE_MAP_2; + int err; + + PDEBUG(DBG_V4L2_CID, "Set horizontal flip to %d", + val); + err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1); + if (err < 0) + goto out; + err = s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1); + if (err < 0) + goto out; + + data = ((data & ~S5K4AA_RM_H_FLIP) | ((val & 0x01) << 6)); + err = s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1); + if (err < 0) + goto out; + + if (val) { + err = s5k4aa_read_sensor(sd, S5K4AA_COLSTART_LO, &data, 1); + if (err < 0) + goto out; + data++; + err = s5k4aa_write_sensor(sd, S5K4AA_COLSTART_LO, &data, 1); + if (err < 0) + goto out; + } else { + err = s5k4aa_read_sensor(sd, S5K4AA_COLSTART_LO, &data, 1); + if (err < 0) + goto out; + data--; + err = s5k4aa_write_sensor(sd, S5K4AA_COLSTART_LO, &data, 1); + } +out: + return (err < 0) ? err : 0; +} + +int s5k4aa_get_gain(struct gspca_dev *gspca_dev, __s32 *val) +{ + struct sd *sd = (struct sd *) gspca_dev; + u8 data = S5K4AA_PAGE_MAP_2; + int err; + + err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1); + if (err < 0) + goto out; + + err = s5k4aa_read_sensor(sd, S5K4AA_GAIN_2, &data, 1); + *val = data; + PDEBUG(DBG_V4L2_CID, "Read gain %d", *val); + +out: + return (err < 0) ? err : 0; +} + +int s5k4aa_set_gain(struct gspca_dev *gspca_dev, __s32 val) +{ + struct sd *sd = (struct sd *) gspca_dev; + u8 data = S5K4AA_PAGE_MAP_2; + int err; + + PDEBUG(DBG_V4L2_CID, "Set gain to %d", val); + err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1); + if (err < 0) + goto out; + + data = val & 0xff; + err = s5k4aa_write_sensor(sd, S5K4AA_GAIN_2, &data, 1); + +out: + return (err < 0) ? err : 0; +} + +void s5k4aa_dump_registers(struct sd *sd) +{ + int address; + u8 page, old_page; + s5k4aa_read_sensor(sd, S5K4AA_PAGE_MAP, &old_page, 1); + for (page = 0; page < 16; page++) { + s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &page, 1); + info("Dumping the s5k4aa register state for page 0x%x", page); + for (address = 0; address <= 0xff; address++) { + u8 value = 0; + s5k4aa_read_sensor(sd, address, &value, 1); + info("register 0x%x contains 0x%x", + address, value); + } + } + info("s5k4aa register state dump complete"); + + for (page = 0; page < 16; page++) { + s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &page, 1); + info("Probing for which registers that are " + "read/write for page 0x%x", page); + for (address = 0; address <= 0xff; address++) { + u8 old_value, ctrl_value, test_value = 0xff; + + s5k4aa_read_sensor(sd, address, &old_value, 1); + s5k4aa_write_sensor(sd, address, &test_value, 1); + s5k4aa_read_sensor(sd, address, &ctrl_value, 1); + + if (ctrl_value == test_value) + info("register 0x%x is writeable", address); + else + info("register 0x%x is read only", address); + + /* Restore original value */ + s5k4aa_write_sensor(sd, address, &old_value, 1); + } + } + info("Read/write register probing complete"); + s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &old_page, 1); +} |