337 lines
7.8 KiB
C
337 lines
7.8 KiB
C
/*
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* Driver for the po1030 sensor
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*
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* Copyright (c) 2008 Erik Andren
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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_po1030.h"
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int po1030_probe(struct sd *sd)
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{
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u8 prod_id = 0, ver_id = 0, i;
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if (force_sensor) {
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if (force_sensor == PO1030_SENSOR) {
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info("Forcing a %s sensor", po1030.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 po1030 sensor");
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/* Run the pre-init to actually probe the unit */
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for (i = 0; i < ARRAY_SIZE(preinit_po1030); i++) {
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u8 data = preinit_po1030[i][2];
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if (preinit_po1030[i][0] == SENSOR)
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po1030_write_sensor(sd,
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preinit_po1030[i][1], &data, 1);
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else
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m5602_write_bridge(sd, preinit_po1030[i][1], data);
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}
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if (po1030_read_sensor(sd, 0x3, &prod_id, 1))
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return -ENODEV;
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if (po1030_read_sensor(sd, 0x4, &ver_id, 1))
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return -ENODEV;
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if ((prod_id == 0x02) && (ver_id == 0xef)) {
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info("Detected a po1030 sensor");
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goto sensor_found;
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}
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return -ENODEV;
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sensor_found:
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sd->gspca_dev.cam.cam_mode = po1030.modes;
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sd->gspca_dev.cam.nmodes = po1030.nmodes;
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sd->desc->ctrls = po1030.ctrls;
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sd->desc->nctrls = po1030.nctrls;
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return 0;
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}
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int po1030_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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m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR,
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sd->sensor->i2c_slave_id);
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m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address);
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m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x10 + len);
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m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x08);
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for (i = 0; i < len; i++) {
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err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i]));
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PDEBUG(DBG_TRACE, "Reading sensor register "
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"0x%x containing 0x%x ", address, *i2c_data);
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}
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return (err < 0) ? err : 0;
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}
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int po1030_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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/* The po1030 only supports one byte writes */
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if (len > 1 || !len)
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return -EINVAL;
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memcpy(buf, sensor_urb_skeleton, 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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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(DBG_TRACE, "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 footer */
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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 po1030_init(struct sd *sd)
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{
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int i, err = 0;
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/* Init the sensor */
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for (i = 0; i < ARRAY_SIZE(init_po1030); i++) {
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u8 data[2] = {0x00, 0x00};
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switch (init_po1030[i][0]) {
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case BRIDGE:
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err = m5602_write_bridge(sd,
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init_po1030[i][1],
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init_po1030[i][2]);
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break;
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case SENSOR:
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data[0] = init_po1030[i][2];
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err = po1030_write_sensor(sd,
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init_po1030[i][1], data, 1);
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break;
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case SENSOR_LONG:
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data[0] = init_po1030[i][2];
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data[1] = init_po1030[i][3];
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err = po1030_write_sensor(sd,
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init_po1030[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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po1030_dump_registers(sd);
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return (err < 0) ? err : 0;
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}
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int po1030_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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u8 i2c_data;
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int err;
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err = po1030_read_sensor(sd, PO1030_REG_INTEGLINES_H,
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&i2c_data, 1);
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if (err < 0)
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goto out;
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*val = (i2c_data << 8);
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err = po1030_read_sensor(sd, PO1030_REG_INTEGLINES_M,
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&i2c_data, 1);
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*val |= i2c_data;
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PDEBUG(DBG_V4L2_CID, "Exposure read as %d", *val);
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out:
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return (err < 0) ? err : 0;
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}
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int po1030_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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u8 i2c_data;
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int err;
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PDEBUG(DBG_V4L2, "Set exposure to %d", val & 0xffff);
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i2c_data = ((val & 0xff00) >> 8);
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PDEBUG(DBG_V4L2, "Set exposure to high byte to 0x%x",
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i2c_data);
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err = po1030_write_sensor(sd, PO1030_REG_INTEGLINES_H,
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&i2c_data, 1);
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if (err < 0)
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goto out;
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i2c_data = (val & 0xff);
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PDEBUG(DBG_V4L2, "Set exposure to low byte to 0x%x",
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i2c_data);
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err = po1030_write_sensor(sd, PO1030_REG_INTEGLINES_M,
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&i2c_data, 1);
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out:
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return (err < 0) ? err : 0;
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}
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int po1030_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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u8 i2c_data;
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int err;
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err = po1030_read_sensor(sd, PO1030_REG_GLOBALGAIN,
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&i2c_data, 1);
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*val = i2c_data;
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PDEBUG(DBG_V4L2_CID, "Read global gain %d", *val);
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return (err < 0) ? err : 0;
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}
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int po1030_set_gain(struct gspca_dev *gspca_dev, __s32 val)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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u8 i2c_data;
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int err;
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i2c_data = val & 0xff;
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PDEBUG(DBG_V4L2, "Set global gain to %d", i2c_data);
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err = po1030_write_sensor(sd, PO1030_REG_GLOBALGAIN,
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&i2c_data, 1);
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return (err < 0) ? err : 0;
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}
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int po1030_get_red_balance(struct gspca_dev *gspca_dev, __s32 *val)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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u8 i2c_data;
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int err;
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err = po1030_read_sensor(sd, PO1030_REG_RED_GAIN,
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&i2c_data, 1);
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*val = i2c_data;
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PDEBUG(DBG_V4L2_CID, "Read red gain %d", *val);
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return (err < 0) ? err : 0;
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}
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int po1030_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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u8 i2c_data;
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int err;
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i2c_data = val & 0xff;
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PDEBUG(DBG_V4L2, "Set red gain to %d", i2c_data);
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err = po1030_write_sensor(sd, PO1030_REG_RED_GAIN,
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&i2c_data, 1);
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return (err < 0) ? err : 0;
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}
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int po1030_get_blue_balance(struct gspca_dev *gspca_dev, __s32 *val)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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u8 i2c_data;
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int err;
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err = po1030_read_sensor(sd, PO1030_REG_BLUE_GAIN,
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&i2c_data, 1);
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*val = i2c_data;
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PDEBUG(DBG_V4L2_CID, "Read blue gain %d", *val);
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return (err < 0) ? err : 0;
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}
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int po1030_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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u8 i2c_data;
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int err;
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i2c_data = val & 0xff;
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PDEBUG(DBG_V4L2, "Set blue gain to %d", i2c_data);
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err = po1030_write_sensor(sd, PO1030_REG_BLUE_GAIN,
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&i2c_data, 1);
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return (err < 0) ? err : 0;
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}
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int po1030_power_down(struct sd *sd)
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{
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return 0;
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}
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void po1030_dump_registers(struct sd *sd)
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{
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int address;
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u8 value = 0;
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info("Dumping the po1030 sensor core registers");
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for (address = 0; address < 0x7f; address++) {
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po1030_read_sensor(sd, address, &value, 1);
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info("register 0x%x contains 0x%x",
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address, value);
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}
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info("po1030 register state dump complete");
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info("Probing for which registers that are read/write");
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for (address = 0; address < 0xff; address++) {
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u8 old_value, ctrl_value;
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u8 test_value[2] = {0xff, 0xff};
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po1030_read_sensor(sd, address, &old_value, 1);
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po1030_write_sensor(sd, address, test_value, 1);
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po1030_read_sensor(sd, address, &ctrl_value, 1);
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if (ctrl_value == test_value[0])
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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 value */
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po1030_write_sensor(sd, address, &old_value, 1);
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}
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}
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