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dib0700_core.c

/* Linux driver for devices based on the DiBcom DiB0700 USB bridge
 *
 *    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.
 *
 *  Copyright (C) 2005-6 DiBcom, SA
 */
#include "dib0700.h"

/* debug */
int dvb_usb_dib0700_debug;
module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);

static int dvb_usb_dib0700_ir_proto = 1;
module_param(dvb_usb_dib0700_ir_proto, int, 0644);
MODULE_PARM_DESC(dvb_usb_dib0700_ir_proto, "set ir protocol (0=NEC, 1=RC5 (default), 2=RC6).");

/* expecting rx buffer: request data[0] data[1] ... data[2] */
static int dib0700_ctrl_wr(struct dvb_usb_device *d, u8 *tx, u8 txlen)
{
      int status;

      deb_data(">>> ");
      debug_dump(tx,txlen,deb_data);

      status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
            tx[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, tx, txlen,
            USB_CTRL_GET_TIMEOUT);

      if (status != txlen)
            deb_data("ep 0 write error (status = %d, len: %d)\n",status,txlen);

      return status < 0 ? status : 0;
}

/* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
{
      u16 index, value;
      int status;

      if (txlen < 2) {
            err("tx buffer length is smaller than 2. Makes no sense.");
            return -EINVAL;
      }
      if (txlen > 4) {
            err("tx buffer length is larger than 4. Not supported.");
            return -EINVAL;
      }

      deb_data(">>> ");
      debug_dump(tx,txlen,deb_data);

      value = ((txlen - 2) << 8) | tx[1];
      index = 0;
      if (txlen > 2)
            index |= (tx[2] << 8);
      if (txlen > 3)
            index |= tx[3];

      status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
                  USB_TYPE_VENDOR | USB_DIR_IN, value, index, rx, rxlen,
                  USB_CTRL_GET_TIMEOUT);

      if (status < 0)
            deb_info("ep 0 read error (status = %d)\n",status);

      deb_data("<<< ");
      debug_dump(rx,rxlen,deb_data);

      return status; /* length in case of success */
}

int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
{
      u8 buf[3] = { REQUEST_SET_GPIO, gpio, ((gpio_dir & 0x01) << 7) | ((gpio_val & 0x01) << 6) };
      return dib0700_ctrl_wr(d,buf,3);
}

/*
 * I2C master xfer function
 */
static int dib0700_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg *msg,int num)
{
      struct dvb_usb_device *d = i2c_get_adapdata(adap);
      int i,len;
      u8 buf[255];

      if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
            return -EAGAIN;

      for (i = 0; i < num; i++) {
            /* fill in the address */
            buf[1] = (msg[i].addr << 1);
            /* fill the buffer */
            memcpy(&buf[2], msg[i].buf, msg[i].len);

            /* write/read request */
            if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
                  buf[0] = REQUEST_I2C_READ;
                  buf[1] |= 1;

                  /* special thing in the current firmware: when length is zero the read-failed */
                  if ((len = dib0700_ctrl_rd(d, buf, msg[i].len + 2, msg[i+1].buf, msg[i+1].len)) <= 0) {
                        deb_info("I2C read failed on address %x\n", msg[i].addr);
                        break;
                  }

                  msg[i+1].len = len;

                  i++;
            } else {
                  buf[0] = REQUEST_I2C_WRITE;
                  if (dib0700_ctrl_wr(d, buf, msg[i].len + 2) < 0)
                        break;
            }
      }

      mutex_unlock(&d->i2c_mutex);
      return i;
}

static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
{
      return I2C_FUNC_I2C;
}

struct i2c_algorithm dib0700_i2c_algo = {
      .master_xfer   = dib0700_i2c_xfer,
      .functionality = dib0700_i2c_func,
};

int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props,
                  struct dvb_usb_device_description **desc, int *cold)
{
      u8 b[16];
      s16 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev,0),
            REQUEST_GET_VERSION, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, b, 16, USB_CTRL_GET_TIMEOUT);

      deb_info("FW GET_VERSION length: %d\n",ret);

      *cold = ret <= 0;

      deb_info("cold: %d\n", *cold);
      return 0;
}

static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
      u8 pll_src, u8 pll_range, u8 clock_gpio3, u16 pll_prediv,
      u16 pll_loopdiv, u16 free_div, u16 dsuScaler)
{
      u8 b[10];
      b[0] = REQUEST_SET_CLOCK;
      b[1] = (en_pll << 7) | (pll_src << 6) | (pll_range << 5) | (clock_gpio3 << 4);
      b[2] = (pll_prediv >> 8)  & 0xff; // MSB
      b[3] =  pll_prediv        & 0xff; // LSB
      b[4] = (pll_loopdiv >> 8) & 0xff; // MSB
      b[5] =  pll_loopdiv       & 0xff; // LSB
      b[6] = (free_div >> 8)    & 0xff; // MSB
      b[7] =  free_div          & 0xff; // LSB
      b[8] = (dsuScaler >> 8)   & 0xff; // MSB
      b[9] =  dsuScaler         & 0xff; // LSB

      return dib0700_ctrl_wr(d, b, 10);
}

int dib0700_ctrl_clock(struct dvb_usb_device *d, u32 clk_MHz, u8 clock_out_gp3)
{
      switch (clk_MHz) {
            case 72: dib0700_set_clock(d, 1, 0, 1, clock_out_gp3, 2, 24, 0, 0x4c); break;
            default: return -EINVAL;
      }
      return 0;
}

static int dib0700_jumpram(struct usb_device *udev, u32 address)
{
      int ret, actlen;
      u8 buf[8] = { REQUEST_JUMPRAM, 0, 0, 0,
            (address >> 24) & 0xff,
            (address >> 16) & 0xff,
            (address >> 8)  & 0xff,
             address        & 0xff };

      if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
            deb_fw("jumpram to 0x%x failed\n",address);
            return ret;
      }
      if (actlen != 8) {
            deb_fw("jumpram to 0x%x failed\n",address);
            return -EIO;
      }
      return 0;
}

int dib0700_download_firmware(struct usb_device *udev, const struct firmware *fw)
{
      struct hexline hx;
      int pos = 0, ret, act_len;

      u8 buf[260];

      while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
            deb_fwdata("writing to address 0x%08x (buffer: 0x%02x %02x)\n",hx.addr, hx.len, hx.chk);

            buf[0] = hx.len;
            buf[1] = (hx.addr >> 8) & 0xff;
            buf[2] =  hx.addr       & 0xff;
            buf[3] = hx.type;
            memcpy(&buf[4],hx.data,hx.len);
            buf[4+hx.len] = hx.chk;

            ret = usb_bulk_msg(udev,
                  usb_sndbulkpipe(udev, 0x01),
                  buf,
                  hx.len + 5,
                  &act_len,
                  1000);

            if (ret < 0) {
                  err("firmware download failed at %d with %d",pos,ret);
                  return ret;
            }
      }

      if (ret == 0) {
            /* start the firmware */
            if ((ret = dib0700_jumpram(udev, 0x70000000)) == 0) {
                  info("firmware started successfully.");
                  msleep(500);
            }
      } else
            ret = -EIO;

      return ret;
}

int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
{
      struct dib0700_state *st = adap->dev->priv;
      u8 b[4];

      b[0] = REQUEST_ENABLE_VIDEO;
      b[1] = 0x00;
      b[2] = (0x01 << 4); /* Master mode */
      b[3] = 0x00;

      deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);

      if (onoff)
            st->channel_state |=   1 << adap->id;
      else
            st->channel_state &= ~(1 << adap->id);

      b[2] |= st->channel_state;

      if (st->channel_state) /* if at least one channel is active */
            b[1] = (0x01 << 4) | 0x00;

      deb_info("data for streaming: %x %x\n",b[1],b[2]);

      return dib0700_ctrl_wr(adap->dev, b, 4);
}

static int dib0700_rc_setup(struct dvb_usb_device *d)
{
      u8 rc_setup[3] = {REQUEST_SET_RC, dvb_usb_dib0700_ir_proto, 0};
      int i = dib0700_ctrl_wr(d, rc_setup, 3);
      if (i<0) {
            err("ir protocol setup failed");
            return -1;
      }
      return 0;
}

static int dib0700_probe(struct usb_interface *intf,
            const struct usb_device_id *id)
{
      int i;
      struct dvb_usb_device *dev;

      for (i = 0; i < dib0700_device_count; i++)
            if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE, &dev) == 0)
            {
                  dib0700_rc_setup(dev);
                  return 0;
            }

      return -ENODEV;
}

static struct usb_driver dib0700_driver = {
      .name       = "dvb_usb_dib0700",
      .probe      = dib0700_probe,
      .disconnect = dvb_usb_device_exit,
      .id_table   = dib0700_usb_id_table,
};

/* module stuff */
static int __init dib0700_module_init(void)
{
      int result;
      info("loaded with support for %d different device-types", dib0700_device_count);
      if ((result = usb_register(&dib0700_driver))) {
            err("usb_register failed. Error number %d",result);
            return result;
      }

      return 0;
}

static void __exit dib0700_module_exit(void)
{
      /* deregister this driver from the USB subsystem */
      usb_deregister(&dib0700_driver);
}

module_init (dib0700_module_init);
module_exit (dib0700_module_exit);

MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");

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