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