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gl861.c

/* DVB USB compliant linux driver for GL861 USB2.0 devices.
 *
 *    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 "gl861.h"

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

/* debug */
static int dvb_usb_gl861_debug;
module_param_named(debug,dvb_usb_gl861_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);

static int gl861_i2c_msg(struct dvb_usb_device *d, u8 addr,
                   u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
{
      u16 index;
      u16 value = addr << (8 + 1);
      int wo = (rbuf == NULL || rlen == 0); /* write-only */
      u8 req, type;

      if (wo) {
            req = GL861_REQ_I2C_WRITE;
            type = GL861_WRITE;
      } else { /* rw */
            req = GL861_REQ_I2C_READ;
            type = GL861_READ;
      }

      switch (wlen) {
      case 1:
            index = wbuf[0];
            break;
      case 2:
            index = wbuf[0];
            value = value + wbuf[1];
            break;
      default:
            warn("wlen = %x, aborting.", wlen);
            return -EINVAL;
      }

      return usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), req, type,
                         value, index, rbuf, rlen, 2000);
}

/* I2C */
static int gl861_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 (gl861_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 (gl861_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 gl861_i2c_func(struct i2c_adapter *adapter)
{
      return I2C_FUNC_I2C;
}

static struct i2c_algorithm gl861_i2c_algo = {
      .master_xfer   = gl861_i2c_xfer,
      .functionality = gl861_i2c_func,
};

/* Callbacks for DVB USB */
static int gl861_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 gl861_zl10353_config = {
      .demod_address = 0x0f,
      .no_tuner = 1,
      .parallel_ts = 1,
};

static int gl861_frontend_attach(struct dvb_usb_adapter *adap)
{
      if ((adap->fe = dvb_attach(zl10353_attach, &gl861_zl10353_config,
                           &adap->dev->i2c_adap)) != NULL) {
            return 0;
      }

      return -EIO;
}

static struct qt1010_config gl861_qt1010_config = {
      .i2c_address = 0x62
};

static int gl861_tuner_attach(struct dvb_usb_adapter *adap)
{
      return dvb_attach(qt1010_attach,
                    adap->fe, &adap->dev->i2c_adap,
                    &gl861_qt1010_config) == NULL ? -ENODEV : 0;
}

/* DVB USB Driver stuff */
static struct dvb_usb_device_properties gl861_properties;

static int gl861_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 < 2)
            return -ENODEV;

      if ((ret = dvb_usb_device_init(intf, &gl861_properties, THIS_MODULE, &d)) == 0) {
            alt = usb_altnum_to_altsetting(intf, 0);

            if (alt == NULL) {
                  deb_rc("not alt found!\n");
                  return -ENODEV;
            }

            ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
                              alt->desc.bAlternateSetting);
      }

      return ret;
}

static struct usb_device_id gl861_table [] = {
            { USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY580_55801) },
            { USB_DEVICE(USB_VID_ALINK, USB_VID_ALINK_DTU) },
            { }         /* Terminating entry */
};
MODULE_DEVICE_TABLE (usb, gl861_table);

static struct dvb_usb_device_properties gl861_properties = {
      .caps = DVB_USB_IS_AN_I2C_ADAPTER,
      .usb_ctrl = DEVICE_SPECIFIC,

      .size_of_priv     = 0,

      .identify_state   = gl861_identify_state,
      .num_adapters = 1,
      .adapter = {{

            .frontend_attach  = gl861_frontend_attach,
            .tuner_attach     = gl861_tuner_attach,

            .stream = {
                  .type = USB_BULK,
                  .count = 7,
                  .endpoint = 0x81,
                  .u = {
                        .bulk = {
                              .buffersize = 512,
                        }
                  }
            },
      }},
      .i2c_algo         = &gl861_i2c_algo,

      .num_device_descs = 2,
      .devices = {
            {   "MSI Mega Sky 55801 DVB-T USB2.0",
                  { &gl861_table[0], NULL },
                  { NULL },
            },
            {   "A-LINK DTU DVB-T USB2.0",
                  { &gl861_table[1], NULL },
                  { NULL },
            },
      }
};

static struct usb_driver gl861_driver = {
      .name       = "dvb_usb_gl861",
      .probe            = gl861_probe,
      .disconnect = dvb_usb_device_exit,
      .id_table   = gl861_table,
};

/* module stuff */
static int __init gl861_module_init(void)
{
      int ret;

      if ((ret = usb_register(&gl861_driver))) {
            err("usb_register failed. Error number %d", ret);
            return ret;
      }

      return 0;
}

static void __exit gl861_module_exit(void)
{
      /* deregister this driver from the USB subsystem */
      usb_deregister(&gl861_driver);
}

module_init (gl861_module_init);
module_exit (gl861_module_exit);

MODULE_AUTHOR("Carl Lundqvist <comabug@gmail.com>");
MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
MODULE_VERSION("0.1");
MODULE_LICENSE("GPL");

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