drivers/media/dvb/dvb-usb/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 Free
   5  *      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 /* debug */
  15 static int dvb_usb_gl861_debug;
  16 module_param_named(debug,dvb_usb_gl861_debug, int, 0644);
  17 MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
  18
  19 static int gl861_i2c_msg(struct dvb_usb_device *d, u8 addr,
  20                          u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  21 {
  22         u16 index;
  23         u16 value = addr << (8 + 1);
  24         int wo = (rbuf == NULL || rlen == 0); /* write-only */
  25         u8 req, type;
  26
  27         if (wo) {
  28                 req = GL861_REQ_I2C_WRITE;
  29                 type = GL861_WRITE;
  30         } else { /* rw */
  31                 req = GL861_REQ_I2C_READ;
  32                 type = GL861_READ;
  33         }
  34
  35         switch (wlen) {
  36         case 1:
  37                 index = wbuf[0];
  38                 break;
  39         case 2:
  40                 index = wbuf[0];
  41                 value = value + wbuf[1];
  42                 break;
  43         default:
  44                 warn("wlen = %x, aborting.", wlen);
  45                 return -EINVAL;
  46         }
  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 int gl861_identify_state(struct usb_device *udev,
  94                                 struct dvb_usb_device_properties *props,
  95                                 struct dvb_usb_device_description **desc,
  96                                 int *cold)
  97 {
  98         *cold = 0;
  99
 100         return 0;
 101 }
 102
 103 static struct zl10353_config gl861_zl10353_config = {
 104         .demod_address = 0x0f,
 105         .no_tuner = 1,
 106         .parallel_ts = 1,
 107 };
 108
 109 static int gl861_frontend_attach(struct dvb_usb_adapter *adap)
 110 {
 111         if ((adap->fe = dvb_attach(zl10353_attach, &gl861_zl10353_config,
 112                                    &adap->dev->i2c_adap)) != NULL) {
 113                 return 0;
 114         }
 115
 116         return -EIO;
 117 }
 118
 119 static struct qt1010_config gl861_qt1010_config = {
 120         .i2c_address = 0x62
 121 };
 122
 123 static int gl861_tuner_attach(struct dvb_usb_adapter *adap)
 124 {
 125         return dvb_attach(qt1010_attach,
 126                           adap->fe, &adap->dev->i2c_adap,
 127                           &gl861_qt1010_config) == NULL ? -ENODEV : 0;
 128 }
 129
 130 /* DVB USB Driver stuff */
 131 static struct dvb_usb_device_properties gl861_properties;
 132
 133 static int gl861_probe(struct usb_interface *intf,
 134                        const struct usb_device_id *id)
 135 {
 136         struct dvb_usb_device *d;
 137         struct usb_host_interface *alt;
 138         int ret;
 139
 140         if (intf->num_altsetting < 2)
 141                 return -ENODEV;
 142
 143         if ((ret = dvb_usb_device_init(intf, &gl861_properties, THIS_MODULE, &d)) == 0) {
 144                 alt = usb_altnum_to_altsetting(intf, 0);
 145
 146                 if (alt == NULL) {
 147                         deb_rc("not alt found!\n");
 148                         return -ENODEV;
 149                 }
 150
 151                 ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
 152                                         alt->desc.bAlternateSetting);
 153         }
 154
 155         return ret;
 156 }
 157
 158 static struct usb_device_id gl861_table [] = {
 159                 { USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY580_55801) },
 160                 { USB_DEVICE(USB_VID_ALINK, USB_VID_ALINK_DTU) },
 161                 { }             /* Terminating entry */
 162 };
 163 MODULE_DEVICE_TABLE (usb, gl861_table);
 164
 165 static struct dvb_usb_device_properties gl861_properties = {
 166         .caps = DVB_USB_IS_AN_I2C_ADAPTER,
 167         .usb_ctrl = DEVICE_SPECIFIC,
 168
 169         .size_of_priv     = 0,
 170
 171         .identify_state   = gl861_identify_state,
 172         .num_adapters = 1,
 173         .adapter = {{
 174
 175                 .frontend_attach  = gl861_frontend_attach,
 176                 .tuner_attach     = gl861_tuner_attach,
 177
 178                 .stream = {
 179                         .type = USB_BULK,
 180                         .count = 7,
 181                         .endpoint = 0x81,
 182                         .u = {
 183                                 .bulk = {
 184                                         .buffersize = 512,
 185                                 }
 186                         }
 187                 },
 188         }},
 189         .i2c_algo         = &gl861_i2c_algo,
 190
 191         .num_device_descs = 2,
 192         .devices = {
 193                 {   "MSI Mega Sky 55801 DVB-T USB2.0",
 194                         { &gl861_table[0], NULL },
 195                         { NULL },
 196                 },
 197                 {   "A-LINK DTU DVB-T USB2.0",
 198                         { &gl861_table[1], NULL },
 199                         { NULL },
 200                 },
 201         }
 202 };
 203
 204 static struct usb_driver gl861_driver = {
 205         .name           = "dvb_usb_gl861",
 206         .probe          = gl861_probe,
 207         .disconnect     = dvb_usb_device_exit,
 208         .id_table       = gl861_table,
 209 };
 210
 211 /* module stuff */
 212 static int __init gl861_module_init(void)
 213 {
 214         int ret;
 215
 216         if ((ret = usb_register(&gl861_driver))) {
 217                 err("usb_register failed. Error number %d", ret);
 218                 return ret;
 219         }
 220
 221         return 0;
 222 }
 223
 224 static void __exit gl861_module_exit(void)
 225 {
 226         /* deregister this driver from the USB subsystem */
 227         usb_deregister(&gl861_driver);
 228 }
 229
 230 module_init (gl861_module_init);
 231 module_exit (gl861_module_exit);
 232
 233 MODULE_AUTHOR("Carl Lundqvist <comabug@gmail.com>");
 234 MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
 235 MODULE_VERSION("0.1");
 236 MODULE_LICENSE("GPL");