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
  14 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  15
  16 static 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 */
  53 static 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
  82 static u32 gl861_i2c_func(struct i2c_adapter *adapter)
  83 {
  84         return I2C_FUNC_I2C;
  85 }
  86
  87 static struct i2c_algorithm gl861_i2c_algo = {
  88         .master_xfer   = gl861_i2c_xfer,
  89         .functionality = gl861_i2c_func,
  90 };
  91
  92 /* Callbacks for DVB USB */
  93 static struct zl10353_config gl861_zl10353_config = {
  94         .demod_address = 0x0f,
  95         .no_tuner = 1,
  96         .parallel_ts = 1,
  97 };
  98
  99 static 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
 110 static struct qt1010_config gl861_qt1010_config = {
 111         .i2c_address = 0x62
 112 };
 113
 114 static 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
 121 static 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 */
 133 static 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
 151 static 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 };
 158 MODULE_DEVICE_TABLE(usb, gl861_id_table);
 159
 160 static 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
 172 module_usb_driver(gl861_usb_driver);
 173
 174 MODULE_AUTHOR("Carl Lundqvist <comabug@gmail.com>");
 175 MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
 176 MODULE_VERSION("0.1");
 177 MODULE_LICENSE("GPL");