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

   1 /*
   2  * DVB USB library - provides a generic interface for a DVB USB device driver.
   3  *
   4  * dvb-usb-init.c
   5  *
   6  * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
   7  *
   8  *      This program is free software; you can redistribute it and/or modify it
   9  *      under the terms of the GNU General Public License as published by the Free
  10  *      Software Foundation, version 2.
  11  *
  12  * see Documentation/dvb/README.dvb-usb for more information
  13  */
  14 #include "dvb-usb-common.h"
  15
  16 /* debug */
  17 int dvb_usb_debug;
  18 module_param_named(debug,dvb_usb_debug, int, 0644);
  19 MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,pll=4,ts=8,err=16,rc=32,fw=64,mem=128,uxfer=256  (or-able))." DVB_USB_DEBUG_STATUS);
  20
  21 int dvb_usb_disable_rc_polling;
  22 module_param_named(disable_rc_polling, dvb_usb_disable_rc_polling, int, 0644);
  23 MODULE_PARM_DESC(disable_rc_polling, "disable remote control polling (default: 0).");
  24
  25 static int dvb_usb_force_pid_filter_usage;
  26 module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage, int, 0444);
  27 MODULE_PARM_DESC(disable_rc_polling, "force all dvb-usb-devices to use a PID filter, if any (default: 0).");
  28
  29 static int dvb_usb_adapter_init(struct dvb_usb_device *d)
  30 {
  31         struct dvb_usb_adapter *adap;
  32         int ret,n;
  33
  34         for (n = 0; n < d->props.num_adapters; n++) {
  35                 adap = &d->adapter[n];
  36                 adap->dev = d;
  37                 adap->id  = n;
  38
  39                 memcpy(&adap->props, &d->props.adapter[n], sizeof(struct dvb_usb_adapter_properties));
  40
  41 /* speed - when running at FULL speed we need a HW PID filter */
  42                 if (d->udev->speed == USB_SPEED_FULL && !(adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER)) {
  43                         err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)");
  44                         return -ENODEV;
  45                 }
  46
  47                 if ((d->udev->speed == USB_SPEED_FULL && adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER) ||
  48                         (adap->props.caps & DVB_USB_ADAP_NEED_PID_FILTERING)) {
  49                         info("will use the device's hardware PID filter (table count: %d).",adap->props.pid_filter_count);
  50                         adap->pid_filtering  = 1;
  51                         adap->max_feed_count = adap->props.pid_filter_count;
  52                 } else {
  53                         info("will pass the complete MPEG2 transport stream to the software demuxer.");
  54                         adap->pid_filtering  = 0;
  55                         adap->max_feed_count = 255;
  56                 }
  57
  58                 if (!adap->pid_filtering &&
  59                         dvb_usb_force_pid_filter_usage &&
  60                         adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER) {
  61                         info("pid filter enabled by module option.");
  62                         adap->pid_filtering  = 1;
  63                         adap->max_feed_count = adap->props.pid_filter_count;
  64                 }
  65
  66                 if (adap->props.size_of_priv > 0) {
  67                         adap->priv = kzalloc(adap->props.size_of_priv,GFP_KERNEL);
  68                         if (adap->priv == NULL) {
  69                                 err("no memory for priv for adapter %d.",n);
  70                                 return -ENOMEM;
  71                         }
  72                 }
  73
  74                 if ((ret = dvb_usb_adapter_stream_init(adap)) ||
  75                         (ret = dvb_usb_adapter_dvb_init(adap)) ||
  76                         (ret = dvb_usb_adapter_frontend_init(adap))) {
  77                         return ret;
  78                 }
  79
  80                 d->num_adapters_initialized++;
  81                 d->state |= DVB_USB_STATE_DVB;
  82         }
  83
  84         /*
  85          * when reloading the driver w/o replugging the device
  86          * sometimes a timeout occures, this helps
  87          */
  88         if (d->props.generic_bulk_ctrl_endpoint != 0) {
  89                 usb_clear_halt(d->udev,usb_sndbulkpipe(d->udev,d->props.generic_bulk_ctrl_endpoint));
  90                 usb_clear_halt(d->udev,usb_rcvbulkpipe(d->udev,d->props.generic_bulk_ctrl_endpoint));
  91         }
  92
  93         return 0;
  94 }
  95
  96 static int dvb_usb_adapter_exit(struct dvb_usb_device *d)
  97 {
  98         int n;
  99         for (n = 0; n < d->num_adapters_initialized; n++) {
 100                 dvb_usb_adapter_frontend_exit(&d->adapter[n]);
 101                 dvb_usb_adapter_dvb_exit(&d->adapter[n]);
 102                 dvb_usb_adapter_stream_exit(&d->adapter[n]);
 103                 kfree(d->adapter[n].priv);
 104         }
 105         d->num_adapters_initialized = 0;
 106         d->state &= ~DVB_USB_STATE_DVB;
 107         return 0;
 108 }
 109
 110
 111 /* general initialization functions */
 112 static int dvb_usb_exit(struct dvb_usb_device *d)
 113 {
 114         deb_info("state before exiting everything: %x\n",d->state);
 115         dvb_usb_remote_exit(d);
 116         dvb_usb_adapter_exit(d);
 117         dvb_usb_i2c_exit(d);
 118         deb_info("state should be zero now: %x\n",d->state);
 119         d->state = DVB_USB_STATE_INIT;
 120         kfree(d->priv);
 121         kfree(d);
 122         return 0;
 123 }
 124
 125 static int dvb_usb_init(struct dvb_usb_device *d)
 126 {
 127         int ret = 0;
 128
 129         mutex_init(&d->usb_mutex);
 130         mutex_init(&d->i2c_mutex);
 131
 132         d->state = DVB_USB_STATE_INIT;
 133
 134         if (d->props.size_of_priv > 0) {
 135                 d->priv = kzalloc(d->props.size_of_priv,GFP_KERNEL);
 136                 if (d->priv == NULL) {
 137                         err("no memory for priv in 'struct dvb_usb_device'");
 138                         return -ENOMEM;
 139                 }
 140         }
 141
 142 /* check the capabilities and set appropriate variables */
 143         dvb_usb_device_power_ctrl(d, 1);
 144
 145         if ((ret = dvb_usb_i2c_init(d)) ||
 146                 (ret = dvb_usb_adapter_init(d))) {
 147                 dvb_usb_exit(d);
 148                 return ret;
 149         }
 150
 151         if ((ret = dvb_usb_remote_init(d)))
 152                 err("could not initialize remote control.");
 153
 154         dvb_usb_device_power_ctrl(d, 0);
 155
 156         return 0;
 157 }
 158
 159 /* determine the name and the state of the just found USB device */
 160 static struct dvb_usb_device_description * dvb_usb_find_device(struct usb_device *udev,struct dvb_usb_device_properties *props, int *cold)
 161 {
 162         int i,j;
 163         struct dvb_usb_device_description *desc = NULL;
 164         *cold = -1;
 165
 166         for (i = 0; i < props->num_device_descs; i++) {
 167
 168                 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) {
 169                         deb_info("check for cold %x %x\n",props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct);
 170                         if (props->devices[i].cold_ids[j]->idVendor  == le16_to_cpu(udev->descriptor.idVendor) &&
 171                                 props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
 172                                 *cold = 1;
 173                                 desc = &props->devices[i];
 174                                 break;
 175                         }
 176                 }
 177
 178                 if (desc != NULL)
 179                         break;
 180
 181                 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) {
 182                         deb_info("check for warm %x %x\n",props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct);
 183                         if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
 184                                 props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
 185                                 *cold = 0;
 186                                 desc = &props->devices[i];
 187                                 break;
 188                         }
 189                 }
 190         }
 191
 192         if (desc != NULL && props->identify_state != NULL)
 193                 props->identify_state(udev,props,&desc,cold);
 194
 195         return desc;
 196 }
 197
 198 int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff)
 199 {
 200         if (onoff)
 201                 d->powered++;
 202         else
 203                 d->powered--;
 204
 205         if (d->powered == 0 || (onoff && d->powered == 1)) { // when switching from 1 to 0 or from 0 to 1
 206                 deb_info("power control: %d\n", onoff);
 207                 if (d->props.power_ctrl)
 208                         return d->props.power_ctrl(d, onoff);
 209         }
 210         return 0;
 211 }
 212
 213 /*
 214  * USB
 215  */
 216 int dvb_usb_device_init(struct usb_interface *intf, struct dvb_usb_device_properties
 217                 *props, struct module *owner,struct dvb_usb_device **du)
 218 {
 219         struct usb_device *udev = interface_to_usbdev(intf);
 220         struct dvb_usb_device *d = NULL;
 221         struct dvb_usb_device_description *desc = NULL;
 222
 223         int ret = -ENOMEM,cold=0;
 224
 225         if (du != NULL)
 226                 *du = NULL;
 227
 228         if ((desc = dvb_usb_find_device(udev,props,&cold)) == NULL) {
 229                 deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n");
 230                 return -ENODEV;
 231         }
 232
 233         if (cold) {
 234                 info("found a '%s' in cold state, will try to load a firmware",desc->name);
 235                 ret = dvb_usb_download_firmware(udev,props);
 236                 if (!props->no_reconnect || ret != 0)
 237                         return ret;
 238         }
 239
 240         info("found a '%s' in warm state.",desc->name);
 241                 d = kzalloc(sizeof(struct dvb_usb_device),GFP_KERNEL);
 242         if (d == NULL) {
 243                 err("no memory for 'struct dvb_usb_device'");
 244                 return ret;
 245         }
 246
 247         d->udev = udev;
 248         memcpy(&d->props,props,sizeof(struct dvb_usb_device_properties));
 249         d->desc = desc;
 250         d->owner = owner;
 251
 252         usb_set_intfdata(intf, d);
 253
 254         if (du != NULL)
 255                 *du = d;
 256
 257         ret = dvb_usb_init(d);
 258
 259         if (ret == 0)
 260                 info("%s successfully initialized and connected.",desc->name);
 261         else
 262                 info("%s error while loading driver (%d)",desc->name,ret);
 263         return ret;
 264 }
 265 EXPORT_SYMBOL(dvb_usb_device_init);
 266
 267 void dvb_usb_device_exit(struct usb_interface *intf)
 268 {
 269         struct dvb_usb_device *d = usb_get_intfdata(intf);
 270         const char *name = "generic DVB-USB module";
 271
 272         usb_set_intfdata(intf,NULL);
 273         if (d != NULL && d->desc != NULL) {
 274                 name = d->desc->name;
 275                 dvb_usb_exit(d);
 276         }
 277         info("%s successfully deinitialized and disconnected.",name);
 278
 279 }
 280 EXPORT_SYMBOL(dvb_usb_device_exit);
 281
 282 MODULE_VERSION("1.0");
 283 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
 284 MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices");
 285 MODULE_LICENSE("GPL");