| /* |
| * Driver for the s5k83a sensor |
| * |
| * Copyright (C) 2008 Erik Andrén |
| * 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_s5k83a.h" |
| |
| static void s5k83a_dump_registers(struct sd *sd); |
| |
| int s5k83a_probe(struct sd *sd) |
| { |
| u8 prod_id = 0, ver_id = 0; |
| int i, err = 0; |
| |
| if (force_sensor) { |
| if (force_sensor == S5K83A_SENSOR) { |
| info("Forcing a %s sensor", s5k83a.name); |
| goto sensor_found; |
| } |
| /* If we want to force another sensor, don't try to probe this |
| * one */ |
| return -ENODEV; |
| } |
| |
| info("Probing for a s5k83a sensor"); |
| |
| /* Preinit the sensor */ |
| for (i = 0; i < ARRAY_SIZE(preinit_s5k83a) && !err; i++) { |
| u8 data[2] = {preinit_s5k83a[i][2], preinit_s5k83a[i][3]}; |
| if (preinit_s5k83a[i][0] == SENSOR) |
| err = m5602_write_sensor(sd, preinit_s5k83a[i][1], |
| data, 2); |
| else |
| err = m5602_write_bridge(sd, preinit_s5k83a[i][1], |
| data[0]); |
| } |
| |
| /* We don't know what register (if any) that contain the product id |
| * Just pick the first addresses that seem to produce the same results |
| * on multiple machines */ |
| if (s5k83a_read_sensor(sd, 0x00, &prod_id, 1)) |
| return -ENODEV; |
| |
| if (s5k83a_read_sensor(sd, 0x01, &ver_id, 1)) |
| return -ENODEV; |
| |
| if ((prod_id == 0xff) || (ver_id == 0xff)) |
| return -ENODEV; |
| else |
| info("Detected a s5k83a sensor"); |
| |
| sensor_found: |
| sd->gspca_dev.cam.cam_mode = s5k83a.modes; |
| sd->gspca_dev.cam.nmodes = s5k83a.nmodes; |
| sd->desc->ctrls = s5k83a.ctrls; |
| sd->desc->nctrls = s5k83a.nctrls; |
| return 0; |
| } |
| |
| int s5k83a_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); |
| |
| do { |
| err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data); |
| } while ((*i2c_data & I2C_BUSY) && !err); |
| |
| for (i = 0; i < len && !len; i++) { |
| err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i])); |
| |
| PDEBUG(D_CONF, "Reading sensor register " |
| "0x%x containing 0x%x ", address, *i2c_data); |
| } |
| |
| out: |
| return err; |
| } |
| |
| int s5k83a_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(D_CONF, "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 s5k83a_init(struct sd *sd) |
| { |
| int i, err = 0; |
| |
| for (i = 0; i < ARRAY_SIZE(init_s5k83a) && !err; i++) { |
| u8 data[2] = {0x00, 0x00}; |
| |
| switch (init_s5k83a[i][0]) { |
| case BRIDGE: |
| err = m5602_write_bridge(sd, |
| init_s5k83a[i][1], |
| init_s5k83a[i][2]); |
| break; |
| |
| case SENSOR: |
| data[0] = init_s5k83a[i][2]; |
| err = m5602_write_sensor(sd, |
| init_s5k83a[i][1], data, 1); |
| break; |
| |
| case SENSOR_LONG: |
| data[0] = init_s5k83a[i][2]; |
| data[1] = init_s5k83a[i][3]; |
| err = m5602_write_sensor(sd, |
| init_s5k83a[i][1], data, 2); |
| break; |
| default: |
| info("Invalid stream command, exiting init"); |
| return -EINVAL; |
| } |
| } |
| |
| if (dump_sensor) |
| s5k83a_dump_registers(sd); |
| |
| return (err < 0) ? err : 0; |
| } |
| |
| int s5k83a_power_down(struct sd *sd) |
| { |
| return 0; |
| } |
| |
| void s5k83a_dump_registers(struct sd *sd) |
| { |
| int address; |
| u8 page, old_page; |
| s5k83a_read_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1); |
| |
| for (page = 0; page < 16; page++) { |
| m5602_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1); |
| info("Dumping the s5k83a register state for page 0x%x", page); |
| for (address = 0; address <= 0xff; address++) { |
| u8 val = 0; |
| s5k83a_read_sensor(sd, address, &val, 1); |
| info("register 0x%x contains 0x%x", |
| address, val); |
| } |
| } |
| info("s5k83a register state dump complete"); |
| |
| for (page = 0; page < 16; page++) { |
| m5602_write_sensor(sd, S5K83A_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_val, ctrl_val, test_val = 0xff; |
| |
| s5k83a_read_sensor(sd, address, &old_val, 1); |
| m5602_write_sensor(sd, address, &test_val, 1); |
| s5k83a_read_sensor(sd, address, &ctrl_val, 1); |
| |
| if (ctrl_val == test_val) |
| info("register 0x%x is writeable", address); |
| else |
| info("register 0x%x is read only", address); |
| |
| /* Restore original val */ |
| m5602_write_sensor(sd, address, &old_val, 1); |
| } |
| } |
| info("Read/write register probing complete"); |
| m5602_write_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1); |
| } |
| |
| int s5k83a_get_brightness(struct gspca_dev *gspca_dev, __s32 *val) |
| { |
| int err; |
| u8 data[2]; |
| struct sd *sd = (struct sd *) gspca_dev; |
| |
| err = s5k83a_read_sensor(sd, S5K83A_BRIGHTNESS, data, 2); |
| if (err < 0) |
| goto out; |
| |
| data[1] = data[1] << 1; |
| *val = data[1]; |
| |
| out: |
| return err; |
| } |
| |
| int s5k83a_set_brightness(struct gspca_dev *gspca_dev, __s32 val) |
| { |
| int err; |
| u8 data[2]; |
| struct sd *sd = (struct sd *) gspca_dev; |
| |
| data[0] = 0x00; |
| data[1] = 0x20; |
| err = m5602_write_sensor(sd, 0x14, data, 2); |
| if (err < 0) |
| goto out; |
| |
| data[0] = 0x01; |
| data[1] = 0x00; |
| err = m5602_write_sensor(sd, 0x0d, data, 2); |
| if (err < 0) |
| goto out; |
| |
| /* FIXME: This is not sane, we need to figure out the composition |
| of these registers */ |
| data[0] = val >> 3; /* brightness, high 5 bits */ |
| data[1] = val >> 1; /* brightness, high 7 bits */ |
| err = m5602_write_sensor(sd, S5K83A_BRIGHTNESS, data, 2); |
| |
| out: |
| return err; |
| } |
| |
| int s5k83a_get_whiteness(struct gspca_dev *gspca_dev, __s32 *val) |
| { |
| int err; |
| u8 data; |
| struct sd *sd = (struct sd *) gspca_dev; |
| |
| err = s5k83a_read_sensor(sd, S5K83A_WHITENESS, &data, 1); |
| if (err < 0) |
| goto out; |
| |
| *val = data; |
| |
| out: |
| return err; |
| } |
| |
| int s5k83a_set_whiteness(struct gspca_dev *gspca_dev, __s32 val) |
| { |
| int err; |
| u8 data[1]; |
| struct sd *sd = (struct sd *) gspca_dev; |
| |
| data[0] = val; |
| err = m5602_write_sensor(sd, S5K83A_WHITENESS, data, 1); |
| |
| return err; |
| } |
| |
| int s5k83a_get_gain(struct gspca_dev *gspca_dev, __s32 *val) |
| { |
| int err; |
| u8 data[2]; |
| struct sd *sd = (struct sd *) gspca_dev; |
| |
| err = s5k83a_read_sensor(sd, S5K83A_GAIN, data, 2); |
| if (err < 0) |
| goto out; |
| |
| data[1] = data[1] & 0x3f; |
| if (data[1] > S5K83A_MAXIMUM_GAIN) |
| data[1] = S5K83A_MAXIMUM_GAIN; |
| |
| *val = data[1]; |
| |
| out: |
| return err; |
| } |
| |
| int s5k83a_set_gain(struct gspca_dev *gspca_dev, __s32 val) |
| { |
| int err; |
| u8 data[2]; |
| struct sd *sd = (struct sd *) gspca_dev; |
| |
| data[0] = 0; |
| data[1] = val; |
| err = m5602_write_sensor(sd, S5K83A_GAIN, data, 2); |
| return err; |
| } |
| |
| int s5k83a_get_vflip(struct gspca_dev *gspca_dev, __s32 *val) |
| { |
| int err; |
| u8 data[1]; |
| struct sd *sd = (struct sd *) gspca_dev; |
| |
| data[0] = 0x05; |
| err = m5602_write_sensor(sd, S5K83A_PAGE_MAP, data, 1); |
| if (err < 0) |
| goto out; |
| |
| err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1); |
| *val = (data[0] | 0x40) ? 1 : 0; |
| |
| out: |
| return err; |
| } |
| |
| int s5k83a_set_vflip(struct gspca_dev *gspca_dev, __s32 val) |
| { |
| int err; |
| u8 data[1]; |
| struct sd *sd = (struct sd *) gspca_dev; |
| |
| data[0] = 0x05; |
| err = m5602_write_sensor(sd, S5K83A_PAGE_MAP, data, 1); |
| if (err < 0) |
| goto out; |
| |
| err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1); |
| if (err < 0) |
| goto out; |
| |
| /* set or zero six bit, seven is hflip */ |
| data[0] = (val) ? (data[0] & 0x80) | 0x40 | S5K83A_FLIP_MASK |
| : (data[0] & 0x80) | S5K83A_FLIP_MASK; |
| err = m5602_write_sensor(sd, S5K83A_FLIP, data, 1); |
| if (err < 0) |
| goto out; |
| |
| data[0] = (val) ? 0x0b : 0x0a; |
| err = m5602_write_sensor(sd, S5K83A_VFLIP_TUNE, data, 1); |
| |
| out: |
| return err; |
| } |
| |
| int s5k83a_get_hflip(struct gspca_dev *gspca_dev, __s32 *val) |
| { |
| int err; |
| u8 data[1]; |
| struct sd *sd = (struct sd *) gspca_dev; |
| |
| data[0] = 0x05; |
| err = m5602_write_sensor(sd, S5K83A_PAGE_MAP, data, 1); |
| if (err < 0) |
| goto out; |
| |
| err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1); |
| *val = (data[0] | 0x80) ? 1 : 0; |
| |
| out: |
| return err; |
| } |
| |
| int s5k83a_set_hflip(struct gspca_dev *gspca_dev, __s32 val) |
| { |
| int err; |
| u8 data[1]; |
| struct sd *sd = (struct sd *) gspca_dev; |
| |
| data[0] = 0x05; |
| err = m5602_write_sensor(sd, S5K83A_PAGE_MAP, data, 1); |
| if (err < 0) |
| goto out; |
| |
| err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1); |
| if (err < 0) |
| goto out; |
| |
| /* set or zero seven bit, six is vflip */ |
| data[0] = (val) ? (data[0] & 0x40) | 0x80 | S5K83A_FLIP_MASK |
| : (data[0] & 0x40) | S5K83A_FLIP_MASK; |
| err = m5602_write_sensor(sd, S5K83A_FLIP, data, 1); |
| if (err < 0) |
| goto out; |
| |
| data[0] = (val) ? 0x0a : 0x0b; |
| err = m5602_write_sensor(sd, S5K83A_HFLIP_TUNE, data, 1); |
| out: |
| return err; |
| } |