drivers/media/dvb/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                 pr_err("%s: wlen=%d, aborting\n", KBUILD_MODNAME, wlen);
  42                 return -EINVAL;
  43         }
  44
  45         msleep(1); /* avoid I2C errors */
  46
  47         return usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), req, type,
  48                                value, index, rbuf, rlen, 2000);
  49 }
  50
  51 /* I2C */
  52 static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
  53                           int num)
  54 {
  55         struct dvb_usb_device *d = i2c_get_adapdata(adap);
  56         int i;
  57
  58         if (num > 2)
  59                 return -EINVAL;
  60
  61         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
  62                 return -EAGAIN;
  63
  64         for (i = 0; i < num; i++) {
  65                 /* write/read request */
  66                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
  67                         if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
  68                                 msg[i].len, msg[i+1].buf, msg[i+1].len) < 0)
  69                                 break;
  70                         i++;
  71                 } else
  72                         if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
  73                                           msg[i].len, NULL, 0) < 0)
  74                                 break;
  75         }
  76
  77         mutex_unlock(&d->i2c_mutex);
  78         return i;
  79 }
  80
  81 static u32 gl861_i2c_func(struct i2c_adapter *adapter)
  82 {
  83         return I2C_FUNC_I2C;
  84 }
  85
  86 static struct i2c_algorithm gl861_i2c_algo = {
  87         .master_xfer   = gl861_i2c_xfer,
  88         .functionality = gl861_i2c_func,
  89 };
  90
  91 /* Callbacks for DVB USB */
  92 static struct zl10353_config gl861_zl10353_config = {
  93         .demod_address = 0x0f,
  94         .no_tuner = 1,
  95         .parallel_ts = 1,
  96 };
  97
  98 static int gl861_frontend_attach(struct dvb_usb_adapter *adap)
  99 {
 100
 101         adap->fe[0] = dvb_attach(zl10353_attach, &gl861_zl10353_config,
 102                 &adap_to_d(adap)->i2c_adap);
 103         if (adap->fe[0] == NULL)
 104                 return -EIO;
 105
 106         return 0;
 107 }
 108
 109 static struct qt1010_config gl861_qt1010_config = {
 110         .i2c_address = 0x62
 111 };
 112
 113 static int gl861_tuner_attach(struct dvb_usb_adapter *adap)
 114 {
 115         return dvb_attach(qt1010_attach,
 116                           adap->fe[0], &adap_to_d(adap)->i2c_adap,
 117                           &gl861_qt1010_config) == NULL ? -ENODEV : 0;
 118 }
 119
 120 static int gl861_init(struct dvb_usb_device *d)
 121 {
 122         /*
 123          * There is 2 interfaces. Interface 0 is for TV and interface 1 is
 124          * for HID remote controller. Interface 0 has 2 alternate settings.
 125          * For some reason we need to set interface explicitly, defaulted
 126          * as alternate setting 1?
 127          */
 128         return usb_set_interface(d->udev, 0, 0);
 129 }
 130
 131 /* DVB USB Driver stuff */
 132 static struct dvb_usb_device_properties gl861_props = {
 133         .driver_name = KBUILD_MODNAME,
 134         .owner = THIS_MODULE,
 135         .adapter_nr = adapter_nr,
 136
 137         .i2c_algo = &gl861_i2c_algo,
 138         .frontend_attach = gl861_frontend_attach,
 139         .tuner_attach = gl861_tuner_attach,
 140         .init = gl861_init,
 141
 142         .num_adapters = 1,
 143         .adapter = {
 144                 {
 145                         .stream = DVB_USB_STREAM_BULK(0x81, 7, 512),
 146                 }
 147         }
 148 };
 149
 150 static const struct usb_device_id gl861_id_table[] = {
 151         { DVB_USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY580_55801,
 152                 &gl861_props, "MSI Mega Sky 55801 DVB-T USB2.0", NULL) },
 153         { DVB_USB_DEVICE(USB_VID_ALINK, USB_VID_ALINK_DTU,
 154                 &gl861_props, "A-LINK DTU DVB-T USB2.0", NULL) },
 155         { }
 156 };
 157 MODULE_DEVICE_TABLE(usb, gl861_id_table);
 158
 159 static struct usb_driver gl861_usb_driver = {
 160         .name = KBUILD_MODNAME,
 161         .id_table = gl861_id_table,
 162         .probe = dvb_usbv2_probe,
 163         .disconnect = dvb_usbv2_disconnect,
 164         .suspend = dvb_usbv2_suspend,
 165         .resume = dvb_usbv2_resume,
 166         .no_dynamic_id = 1,
 167         .soft_unbind = 1,
 168 };
 169
 170 module_usb_driver(gl861_usb_driver);
 171
 172 MODULE_AUTHOR("Carl Lundqvist <comabug@gmail.com>");
 173 MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
 174 MODULE_VERSION("0.1");
 175 MODULE_LICENSE("GPL");