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

   1 /* dvb-usb-dvb.c is part of the DVB USB library.
   2  *
   3  * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
   4  * see dvb-usb-init.c for copyright information.
   5  *
   6  * This file contains functions for initializing and handling the
   7  * linux-dvb API.
   8  */
   9 #include "dvb-usb-common.h"
  10
  11 /* does the complete input transfer handling */
  12 static int dvb_usb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
  13 {
  14         struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
  15         int newfeedcount, ret;
  16
  17         if (adap == NULL)
  18                 return -ENODEV;
  19
  20         if ((adap->active_fe < 0) ||
  21             (adap->active_fe >= adap->num_frontends_initialized)) {
  22                 return -EINVAL;
  23         }
  24
  25         newfeedcount = adap->feedcount + (onoff ? 1 : -1);
  26
  27         /* stop feed before setting a new pid if there will be no pid anymore */
  28         if (newfeedcount == 0) {
  29                 deb_ts("stop feeding\n");
  30                 usb_urb_kill(&adap->fe_adap[adap->active_fe].stream);
  31
  32                 if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
  33                         ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 0);
  34                         if (ret < 0) {
  35                                 err("error while stopping stream.");
  36                                 return ret;
  37                         }
  38                 }
  39         }
  40
  41         adap->feedcount = newfeedcount;
  42
  43         /* activate the pid on the device specific pid_filter */
  44         deb_ts("setting pid (%s): %5d %04x at index %d '%s'\n",
  45                 adap->fe_adap[adap->active_fe].pid_filtering ?
  46                 "yes" : "no", dvbdmxfeed->pid, dvbdmxfeed->pid,
  47                 dvbdmxfeed->index, onoff ? "on" : "off");
  48         if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
  49                 adap->fe_adap[adap->active_fe].pid_filtering &&
  50                 adap->props.fe[adap->active_fe].pid_filter != NULL)
  51                 adap->props.fe[adap->active_fe].pid_filter(adap, dvbdmxfeed->index, dvbdmxfeed->pid, onoff);
  52
  53         /* start the feed if this was the first feed and there is still a feed
  54          * for reception.
  55          */
  56         if (adap->feedcount == onoff && adap->feedcount > 0) {
  57                 deb_ts("submitting all URBs\n");
  58                 usb_urb_submit(&adap->fe_adap[adap->active_fe].stream);
  59
  60                 deb_ts("controlling pid parser\n");
  61                 if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
  62                         adap->props.fe[adap->active_fe].caps &
  63                         DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF &&
  64                         adap->props.fe[adap->active_fe].pid_filter_ctrl != NULL) {
  65                         ret = adap->props.fe[adap->active_fe].pid_filter_ctrl(adap,
  66                                 adap->fe_adap[adap->active_fe].pid_filtering);
  67                         if (ret < 0) {
  68                                 err("could not handle pid_parser");
  69                                 return ret;
  70                         }
  71                 }
  72                 deb_ts("start feeding\n");
  73                 if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
  74                         ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 1);
  75                         if (ret < 0) {
  76                                 err("error while enabling fifo.");
  77                                 return ret;
  78                         }
  79                 }
  80
  81         }
  82         return 0;
  83 }
  84
  85 static int dvb_usb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
  86 {
  87         deb_ts("start pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid,dvbdmxfeed->type);
  88         return dvb_usb_ctrl_feed(dvbdmxfeed,1);
  89 }
  90
  91 static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
  92 {
  93         deb_ts("stop pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid, dvbdmxfeed->type);
  94         return dvb_usb_ctrl_feed(dvbdmxfeed,0);
  95 }
  96
  97 static void dvb_usb_media_device_register(struct dvb_usb_adapter *adap)
  98 {
  99 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 100         struct media_device *mdev;
 101         struct dvb_usb_device *d = adap->dev;
 102         struct usb_device *udev = d->udev;
 103         int ret;
 104
 105         mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
 106         if (!mdev)
 107                 return;
 108
 109         mdev->dev = &udev->dev;
 110         strlcpy(mdev->model, d->desc->name, sizeof(mdev->model));
 111         if (udev->serial)
 112                 strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial));
 113         strcpy(mdev->bus_info, udev->devpath);
 114         mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
 115         mdev->driver_version = LINUX_VERSION_CODE;
 116
 117         ret = media_device_register(mdev);
 118         if (ret) {
 119                 dev_err(&d->udev->dev,
 120                         "Couldn't create a media device. Error: %d\n",
 121                         ret);
 122                 kfree(mdev);
 123                 return;
 124         }
 125         adap->dvb_adap.mdev = mdev;
 126
 127         dev_info(&d->udev->dev, "media controller created\n");
 128 #endif
 129 }
 130
 131 static void dvb_usb_media_device_unregister(struct dvb_usb_adapter *adap)
 132 {
 133 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 134         if (!adap->dvb_adap.mdev)
 135                 return;
 136
 137         media_device_unregister(adap->dvb_adap.mdev);
 138         kfree(adap->dvb_adap.mdev);
 139         adap->dvb_adap.mdev = NULL;
 140 #endif
 141 }
 142
 143 int dvb_usb_adapter_dvb_init(struct dvb_usb_adapter *adap, short *adapter_nums)
 144 {
 145         int i;
 146         int ret = dvb_register_adapter(&adap->dvb_adap, adap->dev->desc->name,
 147                                        adap->dev->owner, &adap->dev->udev->dev,
 148                                        adapter_nums);
 149
 150         if (ret < 0) {
 151                 deb_info("dvb_register_adapter failed: error %d", ret);
 152                 goto err;
 153         }
 154         adap->dvb_adap.priv = adap;
 155
 156 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 157         dvb_usb_media_device_register(adap);
 158 #endif
 159
 160         if (adap->dev->props.read_mac_address) {
 161                 if (adap->dev->props.read_mac_address(adap->dev,adap->dvb_adap.proposed_mac) == 0)
 162                         info("MAC address: %pM",adap->dvb_adap.proposed_mac);
 163                 else
 164                         err("MAC address reading failed.");
 165         }
 166
 167
 168         adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
 169         adap->demux.priv             = adap;
 170
 171         adap->demux.filternum        = 0;
 172         for (i = 0; i < adap->props.num_frontends; i++) {
 173                 if (adap->demux.filternum < adap->fe_adap[i].max_feed_count)
 174                         adap->demux.filternum = adap->fe_adap[i].max_feed_count;
 175         }
 176         adap->demux.feednum          = adap->demux.filternum;
 177         adap->demux.start_feed       = dvb_usb_start_feed;
 178         adap->demux.stop_feed        = dvb_usb_stop_feed;
 179         adap->demux.write_to_decoder = NULL;
 180         if ((ret = dvb_dmx_init(&adap->demux)) < 0) {
 181                 err("dvb_dmx_init failed: error %d",ret);
 182                 goto err_dmx;
 183         }
 184
 185         adap->dmxdev.filternum       = adap->demux.filternum;
 186         adap->dmxdev.demux           = &adap->demux.dmx;
 187         adap->dmxdev.capabilities    = 0;
 188         if ((ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap)) < 0) {
 189                 err("dvb_dmxdev_init failed: error %d",ret);
 190                 goto err_dmx_dev;
 191         }
 192
 193         if ((ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net,
 194                                                 &adap->demux.dmx)) < 0) {
 195                 err("dvb_net_init failed: error %d",ret);
 196                 goto err_net_init;
 197         }
 198
 199         adap->state |= DVB_USB_ADAP_STATE_DVB;
 200         return 0;
 201
 202 err_net_init:
 203         dvb_dmxdev_release(&adap->dmxdev);
 204 err_dmx_dev:
 205         dvb_dmx_release(&adap->demux);
 206 err_dmx:
 207         dvb_usb_media_device_unregister(adap);
 208         dvb_unregister_adapter(&adap->dvb_adap);
 209 err:
 210         return ret;
 211 }
 212
 213 int dvb_usb_adapter_dvb_exit(struct dvb_usb_adapter *adap)
 214 {
 215         if (adap->state & DVB_USB_ADAP_STATE_DVB) {
 216                 deb_info("unregistering DVB part\n");
 217                 dvb_net_release(&adap->dvb_net);
 218                 adap->demux.dmx.close(&adap->demux.dmx);
 219                 dvb_dmxdev_release(&adap->dmxdev);
 220                 dvb_dmx_release(&adap->demux);
 221                 dvb_usb_media_device_unregister(adap);
 222                 dvb_unregister_adapter(&adap->dvb_adap);
 223                 adap->state &= ~DVB_USB_ADAP_STATE_DVB;
 224         }
 225         return 0;
 226 }
 227
 228 static int dvb_usb_set_active_fe(struct dvb_frontend *fe, int onoff)
 229 {
 230         struct dvb_usb_adapter *adap = fe->dvb->priv;
 231
 232         int ret = (adap->props.frontend_ctrl) ?
 233                 adap->props.frontend_ctrl(fe, onoff) : 0;
 234
 235         if (ret < 0) {
 236                 err("frontend_ctrl request failed");
 237                 return ret;
 238         }
 239         if (onoff)
 240                 adap->active_fe = fe->id;
 241
 242         return 0;
 243 }
 244
 245 static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
 246 {
 247         struct dvb_usb_adapter *adap = fe->dvb->priv;
 248
 249         dvb_usb_device_power_ctrl(adap->dev, 1);
 250
 251         dvb_usb_set_active_fe(fe, 1);
 252
 253         if (adap->fe_adap[fe->id].fe_init)
 254                 adap->fe_adap[fe->id].fe_init(fe);
 255
 256         return 0;
 257 }
 258
 259 static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
 260 {
 261         struct dvb_usb_adapter *adap = fe->dvb->priv;
 262
 263         if (adap->fe_adap[fe->id].fe_sleep)
 264                 adap->fe_adap[fe->id].fe_sleep(fe);
 265
 266         dvb_usb_set_active_fe(fe, 0);
 267
 268         return dvb_usb_device_power_ctrl(adap->dev, 0);
 269 }
 270
 271 int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap)
 272 {
 273         int ret, i;
 274
 275         /* register all given adapter frontends */
 276         for (i = 0; i < adap->props.num_frontends; i++) {
 277
 278                 if (adap->props.fe[i].frontend_attach == NULL) {
 279                         err("strange: '%s' #%d,%d "
 280                             "doesn't want to attach a frontend.",
 281                             adap->dev->desc->name, adap->id, i);
 282
 283                         return 0;
 284                 }
 285
 286                 ret = adap->props.fe[i].frontend_attach(adap);
 287                 if (ret || adap->fe_adap[i].fe == NULL) {
 288                         /* only print error when there is no FE at all */
 289                         if (i == 0)
 290                                 err("no frontend was attached by '%s'",
 291                                         adap->dev->desc->name);
 292
 293                         return 0;
 294                 }
 295
 296                 adap->fe_adap[i].fe->id = i;
 297
 298                 /* re-assign sleep and wakeup functions */
 299                 adap->fe_adap[i].fe_init = adap->fe_adap[i].fe->ops.init;
 300                 adap->fe_adap[i].fe->ops.init  = dvb_usb_fe_wakeup;
 301                 adap->fe_adap[i].fe_sleep = adap->fe_adap[i].fe->ops.sleep;
 302                 adap->fe_adap[i].fe->ops.sleep = dvb_usb_fe_sleep;
 303
 304                 if (dvb_register_frontend(&adap->dvb_adap, adap->fe_adap[i].fe)) {
 305                         err("Frontend %d registration failed.", i);
 306                         dvb_frontend_detach(adap->fe_adap[i].fe);
 307                         adap->fe_adap[i].fe = NULL;
 308                         /* In error case, do not try register more FEs,
 309                          * still leaving already registered FEs alive. */
 310                         if (i == 0)
 311                                 return -ENODEV;
 312                         else
 313                                 return 0;
 314                 }
 315
 316                 /* only attach the tuner if the demod is there */
 317                 if (adap->props.fe[i].tuner_attach != NULL)
 318                         adap->props.fe[i].tuner_attach(adap);
 319
 320                 adap->num_frontends_initialized++;
 321         }
 322
 323         dvb_create_media_graph(&adap->dvb_adap);
 324
 325         return 0;
 326 }
 327
 328 int dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter *adap)
 329 {
 330         int i = adap->num_frontends_initialized - 1;
 331
 332         /* unregister all given adapter frontends */
 333         for (; i >= 0; i--) {
 334                 if (adap->fe_adap[i].fe != NULL) {
 335                         dvb_unregister_frontend(adap->fe_adap[i].fe);
 336                         dvb_frontend_detach(adap->fe_adap[i].fe);
 337                 }
 338         }
 339         adap->num_frontends_initialized = 0;
 340
 341         return 0;
 342 }