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         unsigned int pipe;
  39         u8 request;
  40         u8 type;
  41         u16 value;
  42         u16 index;
  43
  44         switch (wlen) {
  45         case 1:
  46                 /* write { reg }, read { value } */
  47                 pipe = usb_rcvctrlpipe(d->udev, 0);
  48                 request = (addr == DTV5100_DEMOD_ADDR ? DTV5100_DEMOD_READ :
  49                                                         DTV5100_TUNER_READ);
  50                 type = USB_TYPE_VENDOR | USB_DIR_IN;
  51                 value = 0;
  52                 break;
  53         case 2:
  54                 /* write { reg, value } */
  55                 pipe = usb_sndctrlpipe(d->udev, 0);
  56                 request = (addr == DTV5100_DEMOD_ADDR ? DTV5100_DEMOD_WRITE :
  57                                                         DTV5100_TUNER_WRITE);
  58                 type = USB_TYPE_VENDOR | USB_DIR_OUT;
  59                 value = wbuf[1];
  60                 break;
  61         default:
  62                 warn("wlen = %x, aborting.", wlen);
  63                 return -EINVAL;
  64         }
  65         index = (addr << 8) + wbuf[0];
  66
  67         memcpy(st->data, rbuf, rlen);
  68         msleep(1); /* avoid I2C errors */
  69         return usb_control_msg(d->udev, pipe, request,
  70                                type, value, index, st->data, rlen,
  71                                DTV5100_USB_TIMEOUT);
  72 }
  73
  74 /* I2C */
  75 static int dtv5100_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
  76                             int num)
  77 {
  78         struct dvb_usb_device *d = i2c_get_adapdata(adap);
  79         int i;
  80
  81         if (num > 2)
  82                 return -EINVAL;
  83
  84         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
  85                 return -EAGAIN;
  86
  87         for (i = 0; i < num; i++) {
  88                 /* write/read request */
  89                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
  90                         if (dtv5100_i2c_msg(d, msg[i].addr, msg[i].buf,
  91                                             msg[i].len, msg[i+1].buf,
  92                                             msg[i+1].len) < 0)
  93                                 break;
  94                         i++;
  95                 } else if (dtv5100_i2c_msg(d, msg[i].addr, msg[i].buf,
  96                                            msg[i].len, NULL, 0) < 0)
  97                                 break;
  98         }
  99
 100         mutex_unlock(&d->i2c_mutex);
 101         return i;
 102 }
 103
 104 static u32 dtv5100_i2c_func(struct i2c_adapter *adapter)
 105 {
 106         return I2C_FUNC_I2C;
 107 }
 108
 109 static struct i2c_algorithm dtv5100_i2c_algo = {
 110         .master_xfer   = dtv5100_i2c_xfer,
 111         .functionality = dtv5100_i2c_func,
 112 };
 113
 114 /* Callbacks for DVB USB */
 115 static struct zl10353_config dtv5100_zl10353_config = {
 116         .demod_address = DTV5100_DEMOD_ADDR,
 117         .no_tuner = 1,
 118         .parallel_ts = 1,
 119 };
 120
 121 static int dtv5100_frontend_attach(struct dvb_usb_adapter *adap)
 122 {
 123         adap->fe_adap[0].fe = dvb_attach(zl10353_attach, &dtv5100_zl10353_config,
 124                               &adap->dev->i2c_adap);
 125         if (adap->fe_adap[0].fe == NULL)
 126                 return -EIO;
 127
 128         /* disable i2c gate, or it won't work... is this safe? */
 129         adap->fe_adap[0].fe->ops.i2c_gate_ctrl = NULL;
 130
 131         return 0;
 132 }
 133
 134 static struct qt1010_config dtv5100_qt1010_config = {
 135         .i2c_address = DTV5100_TUNER_ADDR
 136 };
 137
 138 static int dtv5100_tuner_attach(struct dvb_usb_adapter *adap)
 139 {
 140         return dvb_attach(qt1010_attach,
 141                           adap->fe_adap[0].fe, &adap->dev->i2c_adap,
 142                           &dtv5100_qt1010_config) == NULL ? -ENODEV : 0;
 143 }
 144
 145 /* DVB USB Driver stuff */
 146 static struct dvb_usb_device_properties dtv5100_properties;
 147
 148 static int dtv5100_probe(struct usb_interface *intf,
 149                          const struct usb_device_id *id)
 150 {
 151         int i, ret;
 152         struct usb_device *udev = interface_to_usbdev(intf);
 153
 154         /* initialize non qt1010/zl10353 part? */
 155         for (i = 0; dtv5100_init[i].request; i++) {
 156                 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 157                                       dtv5100_init[i].request,
 158                                       USB_TYPE_VENDOR | USB_DIR_OUT,
 159                                       dtv5100_init[i].value,
 160                                       dtv5100_init[i].index, NULL, 0,
 161                                       DTV5100_USB_TIMEOUT);
 162                 if (ret)
 163                         return ret;
 164         }
 165
 166         ret = dvb_usb_device_init(intf, &dtv5100_properties,
 167                                   THIS_MODULE, NULL, adapter_nr);
 168         if (ret)
 169                 return ret;
 170
 171         return 0;
 172 }
 173
 174 static struct usb_device_id dtv5100_table[] = {
 175         { USB_DEVICE(0x06be, 0xa232) },
 176         { }             /* Terminating entry */
 177 };
 178 MODULE_DEVICE_TABLE(usb, dtv5100_table);
 179
 180 static struct dvb_usb_device_properties dtv5100_properties = {
 181         .caps = DVB_USB_IS_AN_I2C_ADAPTER,
 182         .usb_ctrl = DEVICE_SPECIFIC,
 183
 184         .size_of_priv = sizeof(struct dtv5100_state),
 185
 186         .num_adapters = 1,
 187         .adapter = {{
 188                 .num_frontends = 1,
 189                 .fe = {{
 190                 .frontend_attach = dtv5100_frontend_attach,
 191                 .tuner_attach    = dtv5100_tuner_attach,
 192
 193                 .stream = {
 194                         .type = USB_BULK,
 195                         .count = 8,
 196                         .endpoint = 0x82,
 197                         .u = {
 198                                 .bulk = {
 199                                         .buffersize = 4096,
 200                                 }
 201                         }
 202                 },
 203                 }},
 204         } },
 205
 206         .i2c_algo = &dtv5100_i2c_algo,
 207
 208         .num_device_descs = 1,
 209         .devices = {
 210                 {
 211                         .name = "AME DTV-5100 USB2.0 DVB-T",
 212                         .cold_ids = { NULL },
 213                         .warm_ids = { &dtv5100_table[0], NULL },
 214                 },
 215         }
 216 };
 217
 218 static struct usb_driver dtv5100_driver = {
 219         .name           = "dvb_usb_dtv5100",
 220         .probe          = dtv5100_probe,
 221         .disconnect     = dvb_usb_device_exit,
 222         .id_table       = dtv5100_table,
 223 };
 224
 225 module_usb_driver(dtv5100_driver);
 226
 227 MODULE_AUTHOR(DRIVER_AUTHOR);
 228 MODULE_DESCRIPTION(DRIVER_DESC);
 229 MODULE_LICENSE("GPL");