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(force_pid_filter_usage, "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, short *adapter_nrs)
  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, adapter_nrs)) ||
  76                         (ret = dvb_usb_adapter_frontend_init(adap))) {
  77                         return ret;
  78                 }
  79
  80                 /* use exclusive FE lock if there is multiple shared FEs */
  81                 if (adap->fe[1])
  82                         adap->dvb_adap.mfe_shared = 1;
  83
  84                 d->num_adapters_initialized++;
  85                 d->state |= DVB_USB_STATE_DVB;
  86         }
  87
  88         /*
  89          * when reloading the driver w/o replugging the device
  90          * sometimes a timeout occures, this helps
  91          */
  92         if (d->props.generic_bulk_ctrl_endpoint != 0) {
  93                 usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
  94                 usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
  95         }
  96
  97         return 0;
  98 }
  99
 100 static int dvb_usb_adapter_exit(struct dvb_usb_device *d)
 101 {
 102         int n;
 103
 104         for (n = 0; n < d->num_adapters_initialized; n++) {
 105                 dvb_usb_adapter_frontend_exit(&d->adapter[n]);
 106                 dvb_usb_adapter_dvb_exit(&d->adapter[n]);
 107                 dvb_usb_adapter_stream_exit(&d->adapter[n]);
 108                 kfree(d->adapter[n].priv);
 109         }
 110         d->num_adapters_initialized = 0;
 111         d->state &= ~DVB_USB_STATE_DVB;
 112         return 0;
 113 }
 114
 115
 116 /* general initialization functions */
 117 static int dvb_usb_exit(struct dvb_usb_device *d)
 118 {
 119         deb_info("state before exiting everything: %x\n", d->state);
 120         dvb_usb_remote_exit(d);
 121         dvb_usb_adapter_exit(d);
 122         dvb_usb_i2c_exit(d);
 123         deb_info("state should be zero now: %x\n", d->state);
 124         d->state = DVB_USB_STATE_INIT;
 125         kfree(d->priv);
 126         kfree(d);
 127         return 0;
 128 }
 129
 130 static int dvb_usb_init(struct dvb_usb_device *d, short *adapter_nums)
 131 {
 132         int ret = 0;
 133
 134         mutex_init(&d->usb_mutex);
 135         mutex_init(&d->i2c_mutex);
 136
 137         d->state = DVB_USB_STATE_INIT;
 138
 139         if (d->props.size_of_priv > 0) {
 140                 d->priv = kzalloc(d->props.size_of_priv, GFP_KERNEL);
 141                 if (d->priv == NULL) {
 142                         err("no memory for priv in 'struct dvb_usb_device'");
 143                         return -ENOMEM;
 144                 }
 145         }
 146
 147         /* check the capabilities and set appropriate variables */
 148         dvb_usb_device_power_ctrl(d, 1);
 149
 150         if ((ret = dvb_usb_i2c_init(d)) ||
 151                 (ret = dvb_usb_adapter_init(d, adapter_nums))) {
 152                 dvb_usb_exit(d);
 153                 return ret;
 154         }
 155
 156         if ((ret = dvb_usb_remote_init(d)))
 157                 err("could not initialize remote control.");
 158
 159         dvb_usb_device_power_ctrl(d, 0);
 160
 161         return 0;
 162 }
 163
 164 /* determine the name and the state of the just found USB device */
 165 static struct dvb_usb_device_description *dvb_usb_find_device(struct usb_device *udev, struct dvb_usb_device_properties *props, int *cold)
 166 {
 167         int i, j;
 168         struct dvb_usb_device_description *desc = NULL;
 169
 170         *cold = -1;
 171
 172         for (i = 0; i < props->num_device_descs; i++) {
 173
 174                 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) {
 175                         deb_info("check for cold %x %x\n", props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct);
 176                         if (props->devices[i].cold_ids[j]->idVendor  == le16_to_cpu(udev->descriptor.idVendor) &&
 177                                 props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
 178                                 *cold = 1;
 179                                 desc = &props->devices[i];
 180                                 break;
 181                         }
 182                 }
 183
 184                 if (desc != NULL)
 185                         break;
 186
 187                 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) {
 188                         deb_info("check for warm %x %x\n", props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct);
 189                         if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
 190                                 props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
 191                                 *cold = 0;
 192                                 desc = &props->devices[i];
 193                                 break;
 194                         }
 195                 }
 196         }
 197
 198         if (desc != NULL && props->identify_state != NULL)
 199                 props->identify_state(udev, props, &desc, cold);
 200
 201         return desc;
 202 }
 203
 204 int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff)
 205 {
 206         if (onoff)
 207                 d->powered++;
 208         else
 209                 d->powered--;
 210
 211         if (d->powered == 0 || (onoff && d->powered == 1)) { /* when switching from 1 to 0 or from 0 to 1 */
 212                 deb_info("power control: %d\n", onoff);
 213                 if (d->props.power_ctrl)
 214                         return d->props.power_ctrl(d, onoff);
 215         }
 216         return 0;
 217 }
 218
 219 /*
 220  * USB
 221  */
 222 int dvb_usb_device_init(struct usb_interface *intf,
 223                         struct dvb_usb_device_properties *props,
 224                         struct module *owner, struct dvb_usb_device **du,
 225                         short *adapter_nums)
 226 {
 227         struct usb_device *udev = interface_to_usbdev(intf);
 228         struct dvb_usb_device *d = NULL;
 229         struct dvb_usb_device_description *desc = NULL;
 230
 231         int ret = -ENOMEM, cold = 0;
 232
 233         if (du != NULL)
 234                 *du = NULL;
 235
 236         if ((desc = dvb_usb_find_device(udev, props, &cold)) == NULL) {
 237                 deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n");
 238                 return -ENODEV;
 239         }
 240
 241         if (cold) {
 242                 info("found a '%s' in cold state, will try to load a firmware", desc->name);
 243                 ret = dvb_usb_download_firmware(udev, props);
 244                 if (!props->no_reconnect || ret != 0)
 245                         return ret;
 246         }
 247
 248         info("found a '%s' in warm state.", desc->name);
 249         d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL);
 250         if (d == NULL) {
 251                 err("no memory for 'struct dvb_usb_device'");
 252                 return -ENOMEM;
 253         }
 254
 255         d->udev = udev;
 256         memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties));
 257         d->desc = desc;
 258         d->owner = owner;
 259
 260         usb_set_intfdata(intf, d);
 261
 262         if (du != NULL)
 263                 *du = d;
 264
 265         ret = dvb_usb_init(d, adapter_nums);
 266
 267         if (ret == 0)
 268                 info("%s successfully initialized and connected.", desc->name);
 269         else
 270                 info("%s error while loading driver (%d)", desc->name, ret);
 271         return ret;
 272 }
 273 EXPORT_SYMBOL(dvb_usb_device_init);
 274
 275 void dvb_usb_device_exit(struct usb_interface *intf)
 276 {
 277         struct dvb_usb_device *d = usb_get_intfdata(intf);
 278         const char *name = "generic DVB-USB module";
 279
 280         usb_set_intfdata(intf, NULL);
 281         if (d != NULL && d->desc != NULL) {
 282                 name = d->desc->name;
 283                 dvb_usb_exit(d);
 284         }
 285         info("%s successfully deinitialized and disconnected.", name);
 286
 287 }
 288 EXPORT_SYMBOL(dvb_usb_device_exit);
 289
 290 MODULE_VERSION("1.0");
 291 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
 292 MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices");
 293 MODULE_LICENSE("GPL");