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au6610.c

/* DVB USB compliant linux driver for Sigmatek DVB-110 DVB-T USB2.0 receiver
 *
 * Copyright (C) 2006 Antti Palosaari <crope@iki.fi>
 *
 *    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.
 *
 * see Documentation/dvb/README.dvb-usb for more information
 */

#include "au6610.h"

#include "zl10353.h"
#include "qt1010.h"

/* debug */
static int dvb_usb_au6610_debug;
module_param_named(debug, dvb_usb_au6610_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);

static int au6610_usb_msg(struct dvb_usb_device *d, u8 operation, u8 addr,
                    u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
{
      int ret;
      u16 index;
      u8 usb_buf[6]; /* enough for all known requests,
                    read returns 5 and write 6 bytes */
      switch (wlen) {
      case 1:
            index = wbuf[0] << 8;
            break;
      case 2:
            index = wbuf[0] << 8;
            index += wbuf[1];
            break;
      default:
            warn("wlen = %x, aborting.", wlen);
            return -EINVAL;
      }

      ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), operation,
                        USB_TYPE_VENDOR|USB_DIR_IN, addr << 1, index, usb_buf,
                        sizeof(usb_buf), AU6610_USB_TIMEOUT);

      if (ret < 0)
            return ret;

      switch (operation) {
      case AU6610_REQ_I2C_READ:
      case AU6610_REQ_USB_READ:
            /* requested value is always 5th byte in buffer */
            rbuf[0] = usb_buf[4];
      }

      return ret;
}

static int au6610_i2c_msg(struct dvb_usb_device *d, u8 addr,
                    u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
{
      u8 request;
      u8 wo = (rbuf == NULL || rlen == 0); /* write-only */

      if (wo) {
            request = AU6610_REQ_I2C_WRITE;
      } else { /* rw */
            request = AU6610_REQ_I2C_READ;
      }

      return au6610_usb_msg(d, request, addr, wbuf, wlen, rbuf, rlen);
}


/* I2C */
static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
                     int num)
{
      struct dvb_usb_device *d = i2c_get_adapdata(adap);
      int i;

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

      if (num > 2)
            return -EINVAL;

      for (i = 0; i < num; i++) {
            /* write/read request */
            if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
                  if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
                                 msg[i].len, msg[i+1].buf,
                                 msg[i+1].len) < 0)
                        break;
                  i++;
            } else if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
                                     msg[i].len, NULL, 0) < 0)
                        break;
      }

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


static u32 au6610_i2c_func(struct i2c_adapter *adapter)
{
      return I2C_FUNC_I2C;
}

static struct i2c_algorithm au6610_i2c_algo = {
      .master_xfer   = au6610_i2c_xfer,
      .functionality = au6610_i2c_func,
};

/* Callbacks for DVB USB */
static int au6610_identify_state(struct usb_device *udev,
                         struct dvb_usb_device_properties *props,
                         struct dvb_usb_device_description **desc,
                         int *cold)
{
      *cold = 0;
      return 0;
}

static struct zl10353_config au6610_zl10353_config = {
      .demod_address = 0x0f,
      .no_tuner = 1,
      .parallel_ts = 1,
};

static int au6610_zl10353_frontend_attach(struct dvb_usb_adapter *adap)
{
      if ((adap->fe = dvb_attach(zl10353_attach, &au6610_zl10353_config,
                           &adap->dev->i2c_adap)) != NULL) {
            return 0;
      }

      return -EIO;
}

static struct qt1010_config au6610_qt1010_config = {
      .i2c_address = 0x62
};

static int au6610_qt1010_tuner_attach(struct dvb_usb_adapter *adap)
{
      return dvb_attach(qt1010_attach,
                    adap->fe, &adap->dev->i2c_adap,
                    &au6610_qt1010_config) == NULL ? -ENODEV : 0;
}

/* DVB USB Driver stuff */
static struct dvb_usb_device_properties au6610_properties;

static int au6610_probe(struct usb_interface *intf,
                  const struct usb_device_id *id)
{
      struct dvb_usb_device *d;
      struct usb_host_interface *alt;
      int ret;

      if (intf->num_altsetting < AU6610_ALTSETTING_COUNT)
            return -ENODEV;

      if ((ret = dvb_usb_device_init(intf, &au6610_properties, THIS_MODULE, &d)) == 0) {
            alt = usb_altnum_to_altsetting(intf, AU6610_ALTSETTING);

            if (alt == NULL) {
                  deb_rc("no alt found!\n");
                  return -ENODEV;
            }
            ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
                              alt->desc.bAlternateSetting);
      }

      return ret;
}


static struct usb_device_id au6610_table [] = {
      { USB_DEVICE(USB_VID_ALCOR_MICRO, USB_PID_SIGMATEK_DVB_110) },
      { }         /* Terminating entry */
};
MODULE_DEVICE_TABLE (usb, au6610_table);

static struct dvb_usb_device_properties au6610_properties = {
      .caps = DVB_USB_IS_AN_I2C_ADAPTER,
      .usb_ctrl = DEVICE_SPECIFIC,
      .size_of_priv     = 0,
      .identify_state   = au6610_identify_state,
      .num_adapters = 1,
      .adapter = {
            {
                  .frontend_attach  = au6610_zl10353_frontend_attach,
                  .tuner_attach     = au6610_qt1010_tuner_attach,

                  .stream = {
                        .type = USB_ISOC,
                        .count = 5,
                        .endpoint = 0x82,
                        .u = {
                              .isoc = {
                                    .framesperurb = 40,
                                    .framesize = 942,   /* maximum packet size */
                                    .interval = 1.25,   /* 125 us */
                              }
                        }
                  },
            }
      },
      .i2c_algo = &au6610_i2c_algo,
      .num_device_descs = 1,
      .devices = {
            {
                  "Sigmatek DVB-110 DVB-T USB2.0",
                  { &au6610_table[0], NULL },
                  { NULL },
            },
      }
};

static struct usb_driver au6610_driver = {
      .name       = "dvb_usb_au6610",
      .probe      = au6610_probe,
      .disconnect = dvb_usb_device_exit,
      .id_table   = au6610_table,
};

/* module stuff */
static int __init au6610_module_init(void)
{
      int ret;

      if ((ret = usb_register(&au6610_driver))) {
            err("usb_register failed. Error number %d", ret);
            return ret;
      }

      return 0;
}

static void __exit au6610_module_exit(void)
{
      /* deregister this driver from the USB subsystem */
      usb_deregister(&au6610_driver);
}

module_init (au6610_module_init);
module_exit (au6610_module_exit);

MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Driver Sigmatek DVB-110 DVB-T USB2.0 / AU6610");
MODULE_VERSION("0.1");
MODULE_LICENSE("GPL");

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