gl861.c

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/* 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"

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

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:
        dev_err(&d->udev->dev, "%s: wlen=%d, aborting\n",
                KBUILD_MODNAME, wlen);
        return -EINVAL;
    }

    msleep(1); /* avoid I2C errors */

    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 (num > 2)
        return -EINVAL;

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

    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 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)
{

    adap->fe[0] = dvb_attach(zl10353_attach, &gl861_zl10353_config,
        &adap_to_d(adap)->i2c_adap);
    if (adap->fe[0] == NULL)
        return -EIO;

    return 0;
}

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[0], &adap_to_d(adap)->i2c_adap,
              &gl861_qt1010_config) == NULL ? -ENODEV : 0;
}

static int gl861_init(struct dvb_usb_device *d)
{
    /*
     * There is 2 interfaces. Interface 0 is for TV and interface 1 is
     * for HID remote controller. Interface 0 has 2 alternate settings.
     * For some reason we need to set interface explicitly, defaulted
     * as alternate setting 1?
     */
    return usb_set_interface(d->udev, 0, 0);
}

/* DVB USB Driver stuff */
static struct dvb_usb_device_properties gl861_props = {
    .driver_name = KBUILD_MODNAME,
    .owner = THIS_MODULE,
    .adapter_nr = adapter_nr,

    .i2c_algo = &gl861_i2c_algo,
    .frontend_attach = gl861_frontend_attach,
    .tuner_attach = gl861_tuner_attach,
    .init = gl861_init,

    .num_adapters = 1,
    .adapter = {
        {
            .stream = DVB_USB_STREAM_BULK(0x81, 7, 512),
        }
    }
};

static const struct usb_device_id gl861_id_table[] = {
    { DVB_USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY580_55801,
        &gl861_props, "MSI Mega Sky 55801 DVB-T USB2.0", NULL) },
    { DVB_USB_DEVICE(USB_VID_ALINK, USB_VID_ALINK_DTU,
        &gl861_props, "A-LINK DTU DVB-T USB2.0", NULL) },
    { }
};
MODULE_DEVICE_TABLE(usb, gl861_id_table);

static struct usb_driver gl861_usb_driver = {
    .name = KBUILD_MODNAME,
    .id_table = gl861_id_table,
    .probe = dvb_usbv2_probe,
    .disconnect = dvb_usbv2_disconnect,
    .suspend = dvb_usbv2_suspend,
    .resume = dvb_usbv2_resume,
    .reset_resume = dvb_usbv2_reset_resume,
    .no_dynamic_id = 1,
    .soft_unbind = 1,
};

module_usb_driver(gl861_usb_driver);

MODULE_AUTHOR("Carl Lundqvist <[email protected]>");
MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
MODULE_VERSION("0.1");
MODULE_LICENSE("GPL");