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 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;
  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 (mutex_lock_interruptible(&d->i2c_mutex) < 0)
  60                 return -EAGAIN;
  61
  62         if (num > 2)
  63                 return -EINVAL;
  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 = 0x1e,
 105         .no_tuner = 1,
 106 };
 107
 108 static int gl861_frontend_attach(struct dvb_usb_adapter *adap)
 109 {
 110         if ((adap->fe = dvb_attach(zl10353_attach, &gl861_zl10353_config,
 111                                         &adap->dev->i2c_adap)) != NULL) {
 112                 return 0;
 113         }
 114
 115         return -EIO;
 116 }
 117
 118 /* DVB USB Driver stuff */
 119 static struct dvb_usb_device_properties gl861_properties;
 120
 121 static int gl861_probe(struct usb_interface *intf,
 122                                                 const struct usb_device_id *id)
 123 {
 124         struct dvb_usb_device *d;
 125         struct usb_host_interface *alt;
 126         int ret;
 127
 128         if (intf->num_altsetting < 2)
 129                 return -ENODEV;
 130
 131         if ((ret = dvb_usb_device_init(intf, &gl861_properties, THIS_MODULE,
 132                                                                 &d)) == 0) {
 133                 alt = usb_altnum_to_altsetting(intf, 0);
 134
 135                 if (alt == NULL) {
 136                         deb_rc("not alt found!\n");
 137                         return -ENODEV;
 138                 }
 139
 140                 ret = usb_set_interface(d->udev, alt->desc.bInterfaceNumber,
 141                                                 alt->desc.bAlternateSetting);
 142         }
 143
 144         return ret;
 145 }
 146
 147 static struct usb_device_id gl861_table [] = {
 148                 { USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY580_55801) },
 149                 {}              /* Terminating entry */
 150 };
 151 MODULE_DEVICE_TABLE (usb, gl861_table);
 152
 153 static struct dvb_usb_device_properties gl861_properties = {
 154         .usb_ctrl = DEVICE_SPECIFIC,
 155
 156         .size_of_priv     = 0,
 157
 158         .identify_state   = gl861_identify_state,
 159         .num_adapters = 1,
 160         .adapter = {{
 161                 .caps = DVB_USB_IS_AN_I2C_ADAPTER,
 162
 163                 .frontend_attach  = gl861_frontend_attach,
 164                 .tuner_attach     = qt1010_tuner_attach,
 165
 166                 .stream = {
 167                         .type = USB_BULK,
 168                         .count = 7,
 169                         .endpoint = 0x81,
 170                         .u = {
 171                                 .bulk = {
 172                                         .buffersize = 512,
 173                                 }
 174                         }
 175                 },
 176         }},
 177         .i2c_algo         = &gl861_i2c_algo,
 178
 179         .generic_bulk_ctrl_endpoint = 0x01,
 180
 181         .num_device_descs = 1,
 182         .devices = {
 183                 {   "MSI Mega Sky 55801 DVB-T USB2.0",
 184                         { &gl861_table[0], NULL },
 185                         { NULL },
 186                 },
 187                 { NULL },
 188         }
 189 };
 190
 191 static struct usb_driver gl861_driver = {
 192         .name           = "dvb_usb_gl861",
 193         .probe          = gl861_probe,
 194         .disconnect     = dvb_usb_device_exit,
 195         .id_table       = gl861_table,
 196 };
 197
 198 /* module stuff */
 199 static int __init gl861_module_init(void)
 200 {
 201         int ret;
 202
 203         if ((ret = usb_register(&gl861_driver))) {
 204                 err("usb_register failed. Error number %d", ret);
 205                 return ret;
 206         }
 207
 208         return 0;
 209 }
 210
 211 static void __exit gl861_module_exit(void)
 212 {
 213         /* deregister this driver from the USB subsystem */
 214         usb_deregister(&gl861_driver);
 215 }
 216
 217 module_init (gl861_module_init);
 218 module_exit (gl861_module_exit);
 219
 220 MODULE_AUTHOR("Carl Lundqvist <comabug@gmail.com>");
 221 MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
 222 MODULE_VERSION("1.0");
 223 MODULE_LICENSE("GPL");