424 lines
9.7 KiB
C
424 lines
9.7 KiB
C
/*
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* Driver for the s5k83a sensor
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*
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* Copyright (C) 2008 Erik Andrén
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* Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
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* Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
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*
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* Portions of code to USB interface and ALi driver software,
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* Copyright (c) 2006 Willem Duinker
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* v4l2 interface modeled after the V4L2 driver
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* for SN9C10x PC Camera Controllers
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2.
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*
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*/
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#include "m5602_s5k83a.h"
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int s5k83a_probe(struct sd *sd)
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{
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u8 prod_id = 0, ver_id = 0;
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int i, err = 0;
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if (force_sensor) {
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if (force_sensor == S5K83A_SENSOR) {
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info("Forcing a %s sensor", s5k83a.name);
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goto sensor_found;
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}
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/* If we want to force another sensor, don't try to probe this
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* one */
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return -ENODEV;
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}
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info("Probing for a s5k83a sensor");
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/* Preinit the sensor */
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for (i = 0; i < ARRAY_SIZE(preinit_s5k83a) && !err; i++) {
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u8 data[2] = {preinit_s5k83a[i][2], preinit_s5k83a[i][3]};
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if (preinit_s5k83a[i][0] == SENSOR)
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err = s5k83a_write_sensor(sd, preinit_s5k83a[i][1],
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data, 2);
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else
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err = m5602_write_bridge(sd, preinit_s5k83a[i][1],
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data[0]);
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}
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/* We don't know what register (if any) that contain the product id
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* Just pick the first addresses that seem to produce the same results
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* on multiple machines */
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if (s5k83a_read_sensor(sd, 0x00, &prod_id, 1))
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return -ENODEV;
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if (s5k83a_read_sensor(sd, 0x01, &ver_id, 1))
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return -ENODEV;
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if ((prod_id == 0xff) || (ver_id == 0xff))
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return -ENODEV;
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else
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info("Detected a s5k83a sensor");
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sensor_found:
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sd->gspca_dev.cam.cam_mode = s5k83a.modes;
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sd->gspca_dev.cam.nmodes = s5k83a.nmodes;
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sd->desc->ctrls = s5k83a.ctrls;
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sd->desc->nctrls = s5k83a.nctrls;
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return 0;
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}
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int s5k83a_read_sensor(struct sd *sd, const u8 address,
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u8 *i2c_data, const u8 len)
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{
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int err, i;
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do {
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err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
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} while ((*i2c_data & I2C_BUSY) && !err);
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if (err < 0)
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goto out;
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err = m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR,
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sd->sensor->i2c_slave_id);
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if (err < 0)
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goto out;
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err = m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address);
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if (err < 0)
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goto out;
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err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x18 + len);
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if (err < 0)
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goto out;
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do {
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err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
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} while ((*i2c_data & I2C_BUSY) && !err);
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if (err < 0)
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goto out;
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for (i = 0; i < len && !len; i++) {
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err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i]));
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PDEBUG(D_CONF, "Reading sensor register "
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"0x%x containing 0x%x ", address, *i2c_data);
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}
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out:
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return (err < 0) ? err : 0;
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}
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int s5k83a_write_sensor(struct sd *sd, const u8 address,
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u8 *i2c_data, const u8 len)
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{
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int err, i;
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u8 *p;
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struct usb_device *udev = sd->gspca_dev.dev;
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__u8 *buf = sd->gspca_dev.usb_buf;
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/* No sensor with a data width larger than 16 bits has yet been seen */
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if (len > 2 || !len)
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return -EINVAL;
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memcpy(buf, sensor_urb_skeleton,
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sizeof(sensor_urb_skeleton));
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buf[11] = sd->sensor->i2c_slave_id;
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buf[15] = address;
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/* Special case larger sensor writes */
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p = buf + 16;
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/* Copy a four byte write sequence for each byte to be written to */
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for (i = 0; i < len; i++) {
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memcpy(p, sensor_urb_skeleton + 16, 4);
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p[3] = i2c_data[i];
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p += 4;
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PDEBUG(D_CONF, "Writing sensor register 0x%x with 0x%x",
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address, i2c_data[i]);
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}
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/* Copy the tailer */
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memcpy(p, sensor_urb_skeleton + 20, 4);
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/* Set the total length */
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p[3] = 0x10 + len;
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err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
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0x04, 0x40, 0x19,
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0x0000, buf,
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20 + len * 4, M5602_URB_MSG_TIMEOUT);
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return (err < 0) ? err : 0;
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}
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int s5k83a_init(struct sd *sd)
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{
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int i, err = 0;
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for (i = 0; i < ARRAY_SIZE(init_s5k83a) && !err; i++) {
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u8 data[2] = {0x00, 0x00};
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switch (init_s5k83a[i][0]) {
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case BRIDGE:
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err = m5602_write_bridge(sd,
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init_s5k83a[i][1],
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init_s5k83a[i][2]);
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break;
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case SENSOR:
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data[0] = init_s5k83a[i][2];
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err = s5k83a_write_sensor(sd,
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init_s5k83a[i][1], data, 1);
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break;
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case SENSOR_LONG:
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data[0] = init_s5k83a[i][2];
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data[1] = init_s5k83a[i][3];
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err = s5k83a_write_sensor(sd,
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init_s5k83a[i][1], data, 2);
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break;
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default:
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info("Invalid stream command, exiting init");
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return -EINVAL;
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}
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}
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if (dump_sensor)
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s5k83a_dump_registers(sd);
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return (err < 0) ? err : 0;
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}
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int s5k83a_power_down(struct sd *sd)
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{
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return 0;
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}
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void s5k83a_dump_registers(struct sd *sd)
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{
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int address;
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u8 page, old_page;
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s5k83a_read_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1);
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for (page = 0; page < 16; page++) {
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s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1);
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info("Dumping the s5k83a register state for page 0x%x", page);
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for (address = 0; address <= 0xff; address++) {
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u8 val = 0;
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s5k83a_read_sensor(sd, address, &val, 1);
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info("register 0x%x contains 0x%x",
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address, val);
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}
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}
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info("s5k83a register state dump complete");
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for (page = 0; page < 16; page++) {
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s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1);
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info("Probing for which registers that are read/write "
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"for page 0x%x", page);
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for (address = 0; address <= 0xff; address++) {
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u8 old_val, ctrl_val, test_val = 0xff;
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s5k83a_read_sensor(sd, address, &old_val, 1);
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s5k83a_write_sensor(sd, address, &test_val, 1);
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s5k83a_read_sensor(sd, address, &ctrl_val, 1);
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if (ctrl_val == test_val)
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info("register 0x%x is writeable", address);
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else
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info("register 0x%x is read only", address);
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/* Restore original val */
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s5k83a_write_sensor(sd, address, &old_val, 1);
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}
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}
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info("Read/write register probing complete");
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s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1);
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}
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int s5k83a_get_brightness(struct gspca_dev *gspca_dev, __s32 *val)
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{
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int err;
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u8 data[2];
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struct sd *sd = (struct sd *) gspca_dev;
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err = s5k83a_read_sensor(sd, S5K83A_BRIGHTNESS, data, 2);
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data[1] = data[1] << 1;
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*val = data[1];
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return (err < 0) ? err : 0;
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}
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int s5k83a_set_brightness(struct gspca_dev *gspca_dev, __s32 val)
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{
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int err;
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u8 data[2];
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struct sd *sd = (struct sd *) gspca_dev;
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data[0] = 0x00;
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data[1] = 0x20;
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err = s5k83a_write_sensor(sd, 0x14, data, 2);
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if (err < 0)
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return err;
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data[0] = 0x01;
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data[1] = 0x00;
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err = s5k83a_write_sensor(sd, 0x0d, data, 2);
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if (err < 0)
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return err;
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/* FIXME: This is not sane, we need to figure out the composition
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of these registers */
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data[0] = val >> 3; /* brightness, high 5 bits */
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data[1] = val >> 1; /* brightness, high 7 bits */
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err = s5k83a_write_sensor(sd, S5K83A_BRIGHTNESS, data, 2);
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return (err < 0) ? err : 0;
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}
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int s5k83a_get_whiteness(struct gspca_dev *gspca_dev, __s32 *val)
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{
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int err;
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u8 data;
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struct sd *sd = (struct sd *) gspca_dev;
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err = s5k83a_read_sensor(sd, S5K83A_WHITENESS, &data, 1);
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*val = data;
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return (err < 0) ? err : 0;
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}
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int s5k83a_set_whiteness(struct gspca_dev *gspca_dev, __s32 val)
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{
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int err;
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u8 data[1];
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struct sd *sd = (struct sd *) gspca_dev;
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data[0] = val;
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err = s5k83a_write_sensor(sd, S5K83A_WHITENESS, data, 1);
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return (err < 0) ? err : 0;
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}
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int s5k83a_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
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{
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int err;
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u8 data[2];
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struct sd *sd = (struct sd *) gspca_dev;
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err = s5k83a_read_sensor(sd, S5K83A_GAIN, data, 2);
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data[1] = data[1] & 0x3f;
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if (data[1] > S5K83A_MAXIMUM_GAIN)
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data[1] = S5K83A_MAXIMUM_GAIN;
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*val = data[1];
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return (err < 0) ? err : 0;
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}
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int s5k83a_set_gain(struct gspca_dev *gspca_dev, __s32 val)
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{
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int err;
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u8 data[2];
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struct sd *sd = (struct sd *) gspca_dev;
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data[0] = 0;
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data[1] = val;
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err = s5k83a_write_sensor(sd, S5K83A_GAIN, data, 2);
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return (err < 0) ? err : 0;
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}
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int s5k83a_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
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{
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int err;
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u8 data[1];
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struct sd *sd = (struct sd *) gspca_dev;
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data[0] = 0x05;
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err = s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
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if (err < 0)
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return err;
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err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
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*val = (data[0] | 0x40) ? 1 : 0;
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return (err < 0) ? err : 0;
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}
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int s5k83a_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
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{
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int err;
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u8 data[1];
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struct sd *sd = (struct sd *) gspca_dev;
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data[0] = 0x05;
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err = s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
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if (err < 0)
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return err;
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err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
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if (err < 0)
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return err;
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/* set or zero six bit, seven is hflip */
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data[0] = (val) ? (data[0] & 0x80) | 0x40 | S5K83A_FLIP_MASK
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: (data[0] & 0x80) | S5K83A_FLIP_MASK;
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err = s5k83a_write_sensor(sd, S5K83A_FLIP, data, 1);
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if (err < 0)
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return err;
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data[0] = (val) ? 0x0b : 0x0a;
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err = s5k83a_write_sensor(sd, S5K83A_VFLIP_TUNE, data, 1);
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return (err < 0) ? err : 0;
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}
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int s5k83a_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
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{
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int err;
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u8 data[1];
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struct sd *sd = (struct sd *) gspca_dev;
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data[0] = 0x05;
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err = s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
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if (err < 0)
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return err;
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err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
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*val = (data[0] | 0x80) ? 1 : 0;
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return (err < 0) ? err : 0;
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}
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int s5k83a_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
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{
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int err;
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u8 data[1];
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struct sd *sd = (struct sd *) gspca_dev;
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data[0] = 0x05;
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err = s5k83a_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
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if (err < 0)
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return err;
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err = s5k83a_read_sensor(sd, S5K83A_FLIP, data, 1);
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if (err < 0)
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return err;
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/* set or zero seven bit, six is vflip */
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data[0] = (val) ? (data[0] & 0x40) | 0x80 | S5K83A_FLIP_MASK
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: (data[0] & 0x40) | S5K83A_FLIP_MASK;
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err = s5k83a_write_sensor(sd, S5K83A_FLIP, data, 1);
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if (err < 0)
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return err;
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data[0] = (val) ? 0x0a : 0x0b;
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err = s5k83a_write_sensor(sd, S5K83A_HFLIP_TUNE, data, 1);
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return (err < 0) ? err : 0;
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}
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