/*
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* USB Driver for ALi m5602 based webcams
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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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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include "m5602_ov9650.h"
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#include "m5602_ov7660.h"
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#include "m5602_mt9m111.h"
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#include "m5602_po1030.h"
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#include "m5602_s5k83a.h"
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#include "m5602_s5k4aa.h"
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/* Kernel module parameters */
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int force_sensor;
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static bool dump_bridge;
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bool dump_sensor;
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static const struct usb_device_id m5602_table[] = {
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{USB_DEVICE(0x0402, 0x5602)},
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{}
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};
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MODULE_DEVICE_TABLE(usb, m5602_table);
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/* A skeleton used for sending messages to the sensor */
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static const unsigned char sensor_urb_skeleton[] = {
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0x23, M5602_XB_GPIO_EN_H, 0x81, 0x06,
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0x23, M5602_XB_MISC_CTRL, 0x81, 0x80,
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0x13, M5602_XB_I2C_DEV_ADDR, 0x81, 0x00,
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0x13, M5602_XB_I2C_REG_ADDR, 0x81, 0x00,
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0x13, M5602_XB_I2C_DATA, 0x81, 0x00,
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0x13, M5602_XB_I2C_CTRL, 0x81, 0x11
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};
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/* A skeleton used for sending messages to the m5602 bridge */
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static const unsigned char bridge_urb_skeleton[] = {
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0x13, 0x00, 0x81, 0x00
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};
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/* Reads a byte from the m5602 */
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int m5602_read_bridge(struct sd *sd, const u8 address, u8 *i2c_data)
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{
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int err;
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struct gspca_dev *gspca_dev = (struct gspca_dev *) sd;
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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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err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
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0x04, 0xc0, 0x14,
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0x8100 + address, buf,
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1, M5602_URB_MSG_TIMEOUT);
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*i2c_data = buf[0];
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gspca_dbg(gspca_dev, D_CONF, "Reading bridge register 0x%x containing 0x%x\n",
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address, *i2c_data);
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/* usb_control_msg(...) returns the number of bytes sent upon success,
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mask that and return zero instead*/
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return (err < 0) ? err : 0;
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}
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/* Writes a byte to the m5602 */
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int m5602_write_bridge(struct sd *sd, const u8 address, const u8 i2c_data)
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{
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int err;
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struct gspca_dev *gspca_dev = (struct gspca_dev *) sd;
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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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gspca_dbg(gspca_dev, D_CONF, "Writing bridge register 0x%x with 0x%x\n",
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address, i2c_data);
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memcpy(buf, bridge_urb_skeleton,
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sizeof(bridge_urb_skeleton));
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buf[1] = address;
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buf[3] = i2c_data;
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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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4, M5602_URB_MSG_TIMEOUT);
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/* usb_control_msg(...) returns the number of bytes sent upon success,
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mask that and return zero instead */
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return (err < 0) ? err : 0;
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}
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static int m5602_wait_for_i2c(struct sd *sd)
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{
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int err;
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u8 data;
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do {
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err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, &data);
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} while ((data & I2C_BUSY) && !err);
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return err;
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}
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int m5602_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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struct gspca_dev *gspca_dev = (struct gspca_dev *) sd;
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if (!len || len > sd->sensor->i2c_regW)
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return -EINVAL;
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err = m5602_wait_for_i2c(sd);
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if (err < 0)
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return err;
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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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return err;
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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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return err;
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/* Sensors with registers that are of only
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one byte width are differently read */
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/* FIXME: This works with the ov9650, but has issues with the po1030 */
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if (sd->sensor->i2c_regW == 1) {
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err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 1);
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if (err < 0)
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return err;
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err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x08);
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} else {
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err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x18 + len);
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}
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for (i = 0; (i < len) && !err; i++) {
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err = m5602_wait_for_i2c(sd);
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if (err < 0)
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return err;
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err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i]));
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gspca_dbg(gspca_dev, D_CONF, "Reading sensor register 0x%x containing 0x%x\n",
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address, *i2c_data);
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}
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return err;
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}
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int m5602_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 gspca_dev *gspca_dev = (struct gspca_dev *) sd;
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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 > sd->sensor->i2c_regW || !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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gspca_dbg(gspca_dev, D_CONF, "Writing sensor register 0x%x with 0x%x\n",
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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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/* Dump all the registers of the m5602 bridge,
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unfortunately this breaks the camera until it's power cycled */
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static void m5602_dump_bridge(struct sd *sd)
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{
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int i;
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for (i = 0; i < 0x80; i++) {
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unsigned char val = 0;
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m5602_read_bridge(sd, i, &val);
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pr_info("ALi m5602 address 0x%x contains 0x%x\n", i, val);
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}
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pr_info("Warning: The ALi m5602 webcam probably won't work until it's power cycled\n");
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}
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static int m5602_probe_sensor(struct sd *sd)
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{
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/* Try the po1030 */
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sd->sensor = &po1030;
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if (!sd->sensor->probe(sd))
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return 0;
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/* Try the mt9m111 sensor */
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sd->sensor = &mt9m111;
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if (!sd->sensor->probe(sd))
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return 0;
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/* Try the s5k4aa */
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sd->sensor = &s5k4aa;
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if (!sd->sensor->probe(sd))
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return 0;
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/* Try the ov9650 */
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sd->sensor = &ov9650;
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if (!sd->sensor->probe(sd))
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return 0;
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/* Try the ov7660 */
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sd->sensor = &ov7660;
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if (!sd->sensor->probe(sd))
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return 0;
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/* Try the s5k83a */
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sd->sensor = &s5k83a;
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if (!sd->sensor->probe(sd))
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return 0;
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/* More sensor probe function goes here */
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pr_info("Failed to find a sensor\n");
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sd->sensor = NULL;
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return -ENODEV;
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}
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static int m5602_configure(struct gspca_dev *gspca_dev,
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const struct usb_device_id *id);
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static int m5602_init(struct gspca_dev *gspca_dev)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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int err;
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gspca_dbg(gspca_dev, D_CONF, "Initializing ALi m5602 webcam\n");
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/* Run the init sequence */
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err = sd->sensor->init(sd);
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return err;
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}
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static int m5602_init_controls(struct gspca_dev *gspca_dev)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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if (!sd->sensor->init_controls)
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return 0;
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return sd->sensor->init_controls(sd);
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}
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static int m5602_start_transfer(struct gspca_dev *gspca_dev)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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__u8 *buf = sd->gspca_dev.usb_buf;
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int err;
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/* Send start command to the camera */
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const u8 buffer[4] = {0x13, 0xf9, 0x0f, 0x01};
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if (sd->sensor->start)
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sd->sensor->start(sd);
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memcpy(buf, buffer, sizeof(buffer));
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err = usb_control_msg(gspca_dev->dev,
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usb_sndctrlpipe(gspca_dev->dev, 0),
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0x04, 0x40, 0x19, 0x0000, buf,
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sizeof(buffer), M5602_URB_MSG_TIMEOUT);
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gspca_dbg(gspca_dev, D_STREAM, "Transfer started\n");
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return (err < 0) ? err : 0;
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}
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static void m5602_urb_complete(struct gspca_dev *gspca_dev,
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u8 *data, int len)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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if (len < 6) {
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gspca_dbg(gspca_dev, D_PACK, "Packet is less than 6 bytes\n");
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return;
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}
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/* Frame delimiter: ff xx xx xx ff ff */
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if (data[0] == 0xff && data[4] == 0xff && data[5] == 0xff &&
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data[2] != sd->frame_id) {
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gspca_dbg(gspca_dev, D_FRAM, "Frame delimiter detected\n");
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sd->frame_id = data[2];
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/* Remove the extra fluff appended on each header */
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data += 6;
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len -= 6;
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/* Complete the last frame (if any) */
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gspca_frame_add(gspca_dev, LAST_PACKET,
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NULL, 0);
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sd->frame_count++;
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/* Create a new frame */
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gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
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gspca_dbg(gspca_dev, D_FRAM, "Starting new frame %d\n",
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sd->frame_count);
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} else {
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int cur_frame_len;
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cur_frame_len = gspca_dev->image_len;
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/* Remove urb header */
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data += 4;
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len -= 4;
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if (cur_frame_len + len <= gspca_dev->pixfmt.sizeimage) {
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gspca_dbg(gspca_dev, D_FRAM, "Continuing frame %d copying %d bytes\n",
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sd->frame_count, len);
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gspca_frame_add(gspca_dev, INTER_PACKET,
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data, len);
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} else {
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/* Add the remaining data up to frame size */
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gspca_frame_add(gspca_dev, INTER_PACKET, data,
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gspca_dev->pixfmt.sizeimage - cur_frame_len);
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}
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}
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}
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static void m5602_stop_transfer(struct gspca_dev *gspca_dev)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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/* Run the sensor specific end transfer sequence */
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if (sd->sensor->stop)
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sd->sensor->stop(sd);
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}
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/* sub-driver description */
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static const struct sd_desc sd_desc = {
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.name = MODULE_NAME,
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.config = m5602_configure,
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.init = m5602_init,
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.init_controls = m5602_init_controls,
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.start = m5602_start_transfer,
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.stopN = m5602_stop_transfer,
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.pkt_scan = m5602_urb_complete
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};
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/* this function is called at probe time */
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static int m5602_configure(struct gspca_dev *gspca_dev,
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const struct usb_device_id *id)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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struct cam *cam;
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int err;
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cam = &gspca_dev->cam;
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if (dump_bridge)
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m5602_dump_bridge(sd);
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/* Probe sensor */
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err = m5602_probe_sensor(sd);
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if (err)
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goto fail;
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return 0;
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fail:
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gspca_err(gspca_dev, "ALi m5602 webcam failed\n");
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cam->cam_mode = NULL;
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cam->nmodes = 0;
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return err;
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}
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static int m5602_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
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THIS_MODULE);
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}
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static void m5602_disconnect(struct usb_interface *intf)
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{
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struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
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struct sd *sd = (struct sd *) gspca_dev;
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if (sd->sensor->disconnect)
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sd->sensor->disconnect(sd);
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gspca_disconnect(intf);
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}
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static struct usb_driver sd_driver = {
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.name = MODULE_NAME,
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.id_table = m5602_table,
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.probe = m5602_probe,
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#ifdef CONFIG_PM
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.suspend = gspca_suspend,
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.resume = gspca_resume,
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.reset_resume = gspca_resume,
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#endif
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.disconnect = m5602_disconnect
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};
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module_usb_driver(sd_driver);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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module_param(force_sensor, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(force_sensor,
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"forces detection of a sensor, 1 = OV9650, 2 = S5K83A, 3 = S5K4AA, 4 = MT9M111, 5 = PO1030, 6 = OV7660");
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module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");
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module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(dump_sensor, "Dumps all usb sensor registers at startup providing a sensor is found");
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