LXR linux/drivers/media/usb/dvb-usb-v2/gl861.c

   1/* DVB USB compliant linux driver for GL861 USB2.0 devices.
   2 *
   3 *      This program is free software; you can redistribute it and/or modify it
   4 *      under the terms of the GNU General Public License as published by the
   5 *      Free Software Foundation, version 2.
   6 *
   7 * see Documentation/dvb/README.dvb-usb for more information
   8 */
   9#include "gl861.h"
  10
  11#include "zl10353.h"
  12#include "qt1010.h"
  13
  14DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  15
  16static int gl861_i2c_msg(struct dvb_usb_device *d, u8 addr,
  17                         u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  18{
  19        u16 index;
  20        u16 value = addr << (8 + 1);
  21        int wo = (rbuf == NULL || rlen == 0); /* write-only */
  22        u8 req, type;
  23
  24        if (wo) {
  25                req = GL861_REQ_I2C_WRITE;
  26                type = GL861_WRITE;
  27        } else { /* rw */
  28                req = GL861_REQ_I2C_READ;
  29                type = GL861_READ;
  30        }
  31
  32        switch (wlen) {
  33        case 1:
  34                index = wbuf[0];
  35                break;
  36        case 2:
  37                index = wbuf[0];
  38                value = value + wbuf[1];
  39                break;
  40        default:
  41                dev_err(&d->udev->dev, "%s: wlen=%d, aborting\n",
  42                                KBUILD_MODNAME, wlen);
  43                return -EINVAL;
  44        }
  45
  46        msleep(1); /* avoid I2C errors */
  47
  48        return usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), req, type,
  49                               value, index, rbuf, rlen, 2000);
  50}
  51
  52/* I2C */
  53static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
  54                          int num)
  55{
  56        struct dvb_usb_device *d = i2c_get_adapdata(adap);
  57        int i;
  58
  59        if (num > 2)
  60                return -EINVAL;
  61
  62        if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
  63                return -EAGAIN;
  64
  65        for (i = 0; i < num; i++) {
  66                /* write/read request */
  67                if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
  68                        if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
  69                                msg[i].len, msg[i+1].buf, msg[i+1].len) < 0)
  70                                break;
  71                        i++;
  72                } else
  73                        if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
  74                                          msg[i].len, NULL, 0) < 0)
  75                                break;
  76        }
  77
  78        mutex_unlock(&d->i2c_mutex);
  79        return i;
  80}
  81
  82static u32 gl861_i2c_func(struct i2c_adapter *adapter)
  83{
  84        return I2C_FUNC_I2C;
  85}
  86
  87static struct i2c_algorithm gl861_i2c_algo = {
  88        .master_xfer   = gl861_i2c_xfer,
  89        .functionality = gl861_i2c_func,
  90};
  91
  92/* Callbacks for DVB USB */
  93static struct zl10353_config gl861_zl10353_config = {
  94        .demod_address = 0x0f,
  95        .no_tuner = 1,
  96        .parallel_ts = 1,
  97};
  98
  99static int gl861_frontend_attach(struct dvb_usb_adapter *adap)
 100{
 101
 102        adap->fe[0] = dvb_attach(zl10353_attach, &gl861_zl10353_config,
 103                &adap_to_d(adap)->i2c_adap);
 104        if (adap->fe[0] == NULL)
 105                return -EIO;
 106
 107        return 0;
 108}
 109
 110static struct qt1010_config gl861_qt1010_config = {
 111        .i2c_address = 0x62
 112};
 113
 114static int gl861_tuner_attach(struct dvb_usb_adapter *adap)
 115{
 116        return dvb_attach(qt1010_attach,
 117                          adap->fe[0], &adap_to_d(adap)->i2c_adap,
 118                          &gl861_qt1010_config) == NULL ? -ENODEV : 0;
 119}
 120
 121static int gl861_init(struct dvb_usb_device *d)
 122{
 123        /*
 124         * There is 2 interfaces. Interface 0 is for TV and interface 1 is
 125         * for HID remote controller. Interface 0 has 2 alternate settings.
 126         * For some reason we need to set interface explicitly, defaulted
 127         * as alternate setting 1?
 128         */
 129        return usb_set_interface(d->udev, 0, 0);
 130}
 131
 132/* DVB USB Driver stuff */
 133static struct dvb_usb_device_properties gl861_props = {
 134        .driver_name = KBUILD_MODNAME,
 135        .owner = THIS_MODULE,
 136        .adapter_nr = adapter_nr,
 137
 138        .i2c_algo = &gl861_i2c_algo,
 139        .frontend_attach = gl861_frontend_attach,
 140        .tuner_attach = gl861_tuner_attach,
 141        .init = gl861_init,
 142
 143        .num_adapters = 1,
 144        .adapter = {
 145                {
 146                        .stream = DVB_USB_STREAM_BULK(0x81, 7, 512),
 147                }
 148        }
 149};
 150
 151static const struct usb_device_id gl861_id_table[] = {
 152        { DVB_USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY580_55801,
 153                &gl861_props, "MSI Mega Sky 55801 DVB-T USB2.0", NULL) },
 154        { DVB_USB_DEVICE(USB_VID_ALINK, USB_VID_ALINK_DTU,
 155                &gl861_props, "A-LINK DTU DVB-T USB2.0", NULL) },
 156        { }
 157};
 158MODULE_DEVICE_TABLE(usb, gl861_id_table);
 159
 160static struct usb_driver gl861_usb_driver = {
 161        .name = KBUILD_MODNAME,
 162        .id_table = gl861_id_table,
 163        .probe = dvb_usbv2_probe,
 164        .disconnect = dvb_usbv2_disconnect,
 165        .suspend = dvb_usbv2_suspend,
 166        .resume = dvb_usbv2_resume,
 167        .reset_resume = dvb_usbv2_reset_resume,
 168        .no_dynamic_id = 1,
 169        .soft_unbind = 1,
 170};
 171
 172module_usb_driver(gl861_usb_driver);
 173
 174MODULE_AUTHOR("Carl Lundqvist <comabug@gmail.com>");
 175MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
 176MODULE_VERSION("0.1");
 177MODULE_LICENSE("GPL");
 178