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 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  20
  21 static int gl861_i2c_msg(struct dvb_usb_device *d, u8 addr,
  22                          u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  23 {
  24         u16 index;
  25         u16 value = addr << (8 + 1);
  26         int wo = (rbuf == NULL || rlen == 0); /* write-only */
  27         u8 req, type;
  28
  29         if (wo) {
  30                 req = GL861_REQ_I2C_WRITE;
  31                 type = GL861_WRITE;
  32         } else { /* rw */
  33                 req = GL861_REQ_I2C_READ;
  34                 type = GL861_READ;
  35         }
  36
  37         switch (wlen) {
  38         case 1:
  39                 index = wbuf[0];
  40                 break;
  41         case 2:
  42                 index = wbuf[0];
  43                 value = value + wbuf[1];
  44                 break;
  45         default:
  46                 warn("wlen = %x, aborting.", wlen);
  47                 return -EINVAL;
  48         }
  49
  50         msleep(0); /* avoid I2C errors */
  51
  52         return usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), req, type,
  53                                value, index, rbuf, rlen, 2000);
  54 }
  55
  56 /* I2C */
  57 static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
  58                           int num)
  59 {
  60         struct dvb_usb_device *d = i2c_get_adapdata(adap);
  61         int i;
  62
  63         if (num > 2)
  64                 return -EINVAL;
  65
  66         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
  67                 return -EAGAIN;
  68
  69         for (i = 0; i < num; i++) {
  70                 /* write/read request */
  71                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
  72                         if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
  73                                           msg[i].len, msg[i+1].buf, msg[i+1].len) < 0)
  74                                 break;
  75                         i++;
  76                 } else
  77                         if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
  78                                           msg[i].len, NULL, 0) < 0)
  79                                 break;
  80         }
  81
  82         mutex_unlock(&d->i2c_mutex);
  83         return i;
  84 }
  85
  86 static u32 gl861_i2c_func(struct i2c_adapter *adapter)
  87 {
  88         return I2C_FUNC_I2C;
  89 }
  90
  91 static struct i2c_algorithm gl861_i2c_algo = {
  92         .master_xfer   = gl861_i2c_xfer,
  93         .functionality = gl861_i2c_func,
  94 };
  95
  96 /* Callbacks for DVB USB */
  97 static int gl861_identify_state(struct usb_device *udev,
  98                                 struct dvb_usb_device_properties *props,
  99                                 struct dvb_usb_device_description **desc,
 100                                 int *cold)
 101 {
 102         *cold = 0;
 103
 104         return 0;
 105 }
 106
 107 static struct zl10353_config gl861_zl10353_config = {
 108         .demod_address = 0x0f,
 109         .no_tuner = 1,
 110         .parallel_ts = 1,
 111 };
 112
 113 static int gl861_frontend_attach(struct dvb_usb_adapter *adap)
 114 {
 115         if ((adap->fe = dvb_attach(zl10353_attach, &gl861_zl10353_config,
 116                                    &adap->dev->i2c_adap)) != NULL) {
 117                 return 0;
 118         }
 119
 120         return -EIO;
 121 }
 122
 123 static struct qt1010_config gl861_qt1010_config = {
 124         .i2c_address = 0x62
 125 };
 126
 127 static int gl861_tuner_attach(struct dvb_usb_adapter *adap)
 128 {
 129         return dvb_attach(qt1010_attach,
 130                           adap->fe, &adap->dev->i2c_adap,
 131                           &gl861_qt1010_config) == NULL ? -ENODEV : 0;
 132 }
 133
 134 /* DVB USB Driver stuff */
 135 static struct dvb_usb_device_properties gl861_properties;
 136
 137 static int gl861_probe(struct usb_interface *intf,
 138                        const struct usb_device_id *id)
 139 {
 140         struct dvb_usb_device *d;
 141         struct usb_host_interface *alt;
 142         int ret;
 143
 144         if (intf->num_altsetting < 2)
 145                 return -ENODEV;
 146
 147         ret = dvb_usb_device_init(intf, &gl861_properties, THIS_MODULE, &d,
 148                                   adapter_nr);
 149         if (ret == 0) {
 150                 alt = usb_altnum_to_altsetting(intf, 0);
 151
 152                 if (alt == NULL) {
 153                         deb_rc("not alt found!\n");
 154                         return -ENODEV;
 155                 }
 156
 157                 ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
 158                                         alt->desc.bAlternateSetting);
 159         }
 160
 161         return ret;
 162 }
 163
 164 static struct usb_device_id gl861_table [] = {
 165                 { USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY580_55801) },
 166                 { USB_DEVICE(USB_VID_ALINK, USB_VID_ALINK_DTU) },
 167                 { }             /* Terminating entry */
 168 };
 169 MODULE_DEVICE_TABLE (usb, gl861_table);
 170
 171 static struct dvb_usb_device_properties gl861_properties = {
 172         .caps = DVB_USB_IS_AN_I2C_ADAPTER,
 173         .usb_ctrl = DEVICE_SPECIFIC,
 174
 175         .size_of_priv     = 0,
 176
 177         .identify_state   = gl861_identify_state,
 178         .num_adapters = 1,
 179         .adapter = {{
 180
 181                 .frontend_attach  = gl861_frontend_attach,
 182                 .tuner_attach     = gl861_tuner_attach,
 183
 184                 .stream = {
 185                         .type = USB_BULK,
 186                         .count = 7,
 187                         .endpoint = 0x81,
 188                         .u = {
 189                                 .bulk = {
 190                                         .buffersize = 512,
 191                                 }
 192                         }
 193                 },
 194         }},
 195         .i2c_algo         = &gl861_i2c_algo,
 196
 197         .num_device_descs = 2,
 198         .devices = {
 199                 {   "MSI Mega Sky 55801 DVB-T USB2.0",
 200                         { &gl861_table[0], NULL },
 201                         { NULL },
 202                 },
 203                 {   "A-LINK DTU DVB-T USB2.0",
 204                         { &gl861_table[1], NULL },
 205                         { NULL },
 206                 },
 207         }
 208 };
 209
 210 static struct usb_driver gl861_driver = {
 211         .name           = "dvb_usb_gl861",
 212         .probe          = gl861_probe,
 213         .disconnect     = dvb_usb_device_exit,
 214         .id_table       = gl861_table,
 215 };
 216
 217 /* module stuff */
 218 static int __init gl861_module_init(void)
 219 {
 220         int ret;
 221
 222         if ((ret = usb_register(&gl861_driver))) {
 223                 err("usb_register failed. Error number %d", ret);
 224                 return ret;
 225         }
 226
 227         return 0;
 228 }
 229
 230 static void __exit gl861_module_exit(void)
 231 {
 232         /* deregister this driver from the USB subsystem */
 233         usb_deregister(&gl861_driver);
 234 }
 235
 236 module_init (gl861_module_init);
 237 module_exit (gl861_module_exit);
 238
 239 MODULE_AUTHOR("Carl Lundqvist <comabug@gmail.com>");
 240 MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
 241 MODULE_VERSION("0.1");
 242 MODULE_LICENSE("GPL");