drivers/media/usb/dvb-usb/dtv5100.c

   1 /*
   2  * DVB USB Linux driver for AME DTV-5100 USB2.0 DVB-T
   3  *
   4  * Copyright (C) 2008  Antoine Jacquet <royale@zerezo.com>
   5  * http://royale.zerezo.com/dtv5100/
   6  *
   7  * Inspired by gl861.c and au6610.c drivers
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  */
  19
  20 #include "dtv5100.h"
  21 #include "zl10353.h"
  22 #include "qt1010.h"
  23
  24 /* debug */
  25 static int dvb_usb_dtv5100_debug;
  26 module_param_named(debug, dvb_usb_dtv5100_debug, int, 0644);
  27 MODULE_PARM_DESC(debug, "set debugging level" DVB_USB_DEBUG_STATUS);
  28 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  29
  30 struct dtv5100_state {
  31         unsigned char data[80];
  32 };
  33
  34 static int dtv5100_i2c_msg(struct dvb_usb_device *d, u8 addr,
  35                            u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
  36 {
  37         struct dtv5100_state *st = d->priv;
  38         u8 request;
  39         u8 type;
  40         u16 value;
  41         u16 index;
  42
  43         switch (wlen) {
  44         case 1:
  45                 /* write { reg }, read { value } */
  46                 request = (addr == DTV5100_DEMOD_ADDR ? DTV5100_DEMOD_READ :
  47                                                         DTV5100_TUNER_READ);
  48                 type = USB_TYPE_VENDOR | USB_DIR_IN;
  49                 value = 0;
  50                 break;
  51         case 2:
  52                 /* write { reg, value } */
  53                 request = (addr == DTV5100_DEMOD_ADDR ? DTV5100_DEMOD_WRITE :
  54                                                         DTV5100_TUNER_WRITE);
  55                 type = USB_TYPE_VENDOR | USB_DIR_OUT;
  56                 value = wbuf[1];
  57                 break;
  58         default:
  59                 warn("wlen = %x, aborting.", wlen);
  60                 return -EINVAL;
  61         }
  62         index = (addr << 8) + wbuf[0];
  63
  64         memcpy(st->data, rbuf, rlen);
  65         msleep(1); /* avoid I2C errors */
  66         return usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), request,
  67                                type, value, index, st->data, rlen,
  68                                DTV5100_USB_TIMEOUT);
  69 }
  70
  71 /* I2C */
  72 static int dtv5100_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
  73                             int num)
  74 {
  75         struct dvb_usb_device *d = i2c_get_adapdata(adap);
  76         int i;
  77
  78         if (num > 2)
  79                 return -EINVAL;
  80
  81         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
  82                 return -EAGAIN;
  83
  84         for (i = 0; i < num; i++) {
  85                 /* write/read request */
  86                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
  87                         if (dtv5100_i2c_msg(d, msg[i].addr, msg[i].buf,
  88                                             msg[i].len, msg[i+1].buf,
  89                                             msg[i+1].len) < 0)
  90                                 break;
  91                         i++;
  92                 } else if (dtv5100_i2c_msg(d, msg[i].addr, msg[i].buf,
  93                                            msg[i].len, NULL, 0) < 0)
  94                                 break;
  95         }
  96
  97         mutex_unlock(&d->i2c_mutex);
  98         return i;
  99 }
 100
 101 static u32 dtv5100_i2c_func(struct i2c_adapter *adapter)
 102 {
 103         return I2C_FUNC_I2C;
 104 }
 105
 106 static struct i2c_algorithm dtv5100_i2c_algo = {
 107         .master_xfer   = dtv5100_i2c_xfer,
 108         .functionality = dtv5100_i2c_func,
 109 };
 110
 111 /* Callbacks for DVB USB */
 112 static struct zl10353_config dtv5100_zl10353_config = {
 113         .demod_address = DTV5100_DEMOD_ADDR,
 114         .no_tuner = 1,
 115         .parallel_ts = 1,
 116 };
 117
 118 static int dtv5100_frontend_attach(struct dvb_usb_adapter *adap)
 119 {
 120         adap->fe_adap[0].fe = dvb_attach(zl10353_attach, &dtv5100_zl10353_config,
 121                               &adap->dev->i2c_adap);
 122         if (adap->fe_adap[0].fe == NULL)
 123                 return -EIO;
 124
 125         /* disable i2c gate, or it won't work... is this safe? */
 126         adap->fe_adap[0].fe->ops.i2c_gate_ctrl = NULL;
 127
 128         return 0;
 129 }
 130
 131 static struct qt1010_config dtv5100_qt1010_config = {
 132         .i2c_address = DTV5100_TUNER_ADDR
 133 };
 134
 135 static int dtv5100_tuner_attach(struct dvb_usb_adapter *adap)
 136 {
 137         return dvb_attach(qt1010_attach,
 138                           adap->fe_adap[0].fe, &adap->dev->i2c_adap,
 139                           &dtv5100_qt1010_config) == NULL ? -ENODEV : 0;
 140 }
 141
 142 /* DVB USB Driver stuff */
 143 static struct dvb_usb_device_properties dtv5100_properties;
 144
 145 static int dtv5100_probe(struct usb_interface *intf,
 146                          const struct usb_device_id *id)
 147 {
 148         int i, ret;
 149         struct usb_device *udev = interface_to_usbdev(intf);
 150
 151         /* initialize non qt1010/zl10353 part? */
 152         for (i = 0; dtv5100_init[i].request; i++) {
 153                 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 154                                       dtv5100_init[i].request,
 155                                       USB_TYPE_VENDOR | USB_DIR_OUT,
 156                                       dtv5100_init[i].value,
 157                                       dtv5100_init[i].index, NULL, 0,
 158                                       DTV5100_USB_TIMEOUT);
 159                 if (ret)
 160                         return ret;
 161         }
 162
 163         ret = dvb_usb_device_init(intf, &dtv5100_properties,
 164                                   THIS_MODULE, NULL, adapter_nr);
 165         if (ret)
 166                 return ret;
 167
 168         return 0;
 169 }
 170
 171 static struct usb_device_id dtv5100_table[] = {
 172         { USB_DEVICE(0x06be, 0xa232) },
 173         { }             /* Terminating entry */
 174 };
 175 MODULE_DEVICE_TABLE(usb, dtv5100_table);
 176
 177 static struct dvb_usb_device_properties dtv5100_properties = {
 178         .caps = DVB_USB_IS_AN_I2C_ADAPTER,
 179         .usb_ctrl = DEVICE_SPECIFIC,
 180
 181         .size_of_priv = sizeof(struct dtv5100_state),
 182
 183         .num_adapters = 1,
 184         .adapter = {{
 185                 .num_frontends = 1,
 186                 .fe = {{
 187                 .frontend_attach = dtv5100_frontend_attach,
 188                 .tuner_attach    = dtv5100_tuner_attach,
 189
 190                 .stream = {
 191                         .type = USB_BULK,
 192                         .count = 8,
 193                         .endpoint = 0x82,
 194                         .u = {
 195                                 .bulk = {
 196                                         .buffersize = 4096,
 197                                 }
 198                         }
 199                 },
 200                 }},
 201         } },
 202
 203         .i2c_algo = &dtv5100_i2c_algo,
 204
 205         .num_device_descs = 1,
 206         .devices = {
 207                 {
 208                         .name = "AME DTV-5100 USB2.0 DVB-T",
 209                         .cold_ids = { NULL },
 210                         .warm_ids = { &dtv5100_table[0], NULL },
 211                 },
 212         }
 213 };
 214
 215 static struct usb_driver dtv5100_driver = {
 216         .name           = "dvb_usb_dtv5100",
 217         .probe          = dtv5100_probe,
 218         .disconnect     = dvb_usb_device_exit,
 219         .id_table       = dtv5100_table,
 220 };
 221
 222 module_usb_driver(dtv5100_driver);
 223
 224 MODULE_AUTHOR(DRIVER_AUTHOR);
 225 MODULE_DESCRIPTION(DRIVER_DESC);
 226 MODULE_LICENSE("GPL");