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@posteo.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,
  88                dvbdmxfeed->type);
  89         return dvb_usb_ctrl_feed(dvbdmxfeed, 1);
  90 }
  91
  92 static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
  93 {
  94         deb_ts("stop pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid, dvbdmxfeed->type);
  95         return dvb_usb_ctrl_feed(dvbdmxfeed, 0);
  96 }
  97
  98 static int dvb_usb_media_device_init(struct dvb_usb_adapter *adap)
  99 {
 100 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 101         struct media_device *mdev;
 102         struct dvb_usb_device *d = adap->dev;
 103         struct usb_device *udev = d->udev;
 104
 105         mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
 106         if (!mdev)
 107                 return -ENOMEM;
 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         media_device_init(mdev);
 118
 119         dvb_register_media_controller(&adap->dvb_adap, mdev);
 120
 121         dev_info(&d->udev->dev, "media controller created\n");
 122 #endif
 123         return 0;
 124 }
 125
 126 static int  dvb_usb_media_device_register(struct dvb_usb_adapter *adap)
 127 {
 128 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 129         return media_device_register(adap->dvb_adap.mdev);
 130 #else
 131         return 0;
 132 #endif
 133 }
 134
 135 static void dvb_usb_media_device_unregister(struct dvb_usb_adapter *adap)
 136 {
 137 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 138         if (!adap->dvb_adap.mdev)
 139                 return;
 140
 141         media_device_unregister(adap->dvb_adap.mdev);
 142         media_device_cleanup(adap->dvb_adap.mdev);
 143         kfree(adap->dvb_adap.mdev);
 144         adap->dvb_adap.mdev = NULL;
 145 #endif
 146 }
 147
 148 int dvb_usb_adapter_dvb_init(struct dvb_usb_adapter *adap, short *adapter_nums)
 149 {
 150         int i;
 151         int ret = dvb_register_adapter(&adap->dvb_adap, adap->dev->desc->name,
 152                                        adap->dev->owner, &adap->dev->udev->dev,
 153                                        adapter_nums);
 154
 155         if (ret < 0) {
 156                 deb_info("dvb_register_adapter failed: error %d", ret);
 157                 goto err;
 158         }
 159         adap->dvb_adap.priv = adap;
 160
 161         ret = dvb_usb_media_device_init(adap);
 162         if (ret < 0) {
 163                 deb_info("dvb_usb_media_device_init failed: error %d", ret);
 164                 goto err_mc;
 165         }
 166
 167         if (adap->dev->props.read_mac_address) {
 168                 if (adap->dev->props.read_mac_address(adap->dev, adap->dvb_adap.proposed_mac) == 0)
 169                         info("MAC address: %pM", adap->dvb_adap.proposed_mac);
 170                 else
 171                         err("MAC address reading failed.");
 172         }
 173
 174
 175         adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
 176         adap->demux.priv             = adap;
 177
 178         adap->demux.filternum        = 0;
 179         for (i = 0; i < adap->props.num_frontends; i++) {
 180                 if (adap->demux.filternum < adap->fe_adap[i].max_feed_count)
 181                         adap->demux.filternum = adap->fe_adap[i].max_feed_count;
 182         }
 183         adap->demux.feednum          = adap->demux.filternum;
 184         adap->demux.start_feed       = dvb_usb_start_feed;
 185         adap->demux.stop_feed        = dvb_usb_stop_feed;
 186         adap->demux.write_to_decoder = NULL;
 187         if ((ret = dvb_dmx_init(&adap->demux)) < 0) {
 188                 err("dvb_dmx_init failed: error %d", ret);
 189                 goto err_dmx;
 190         }
 191
 192         adap->dmxdev.filternum       = adap->demux.filternum;
 193         adap->dmxdev.demux           = &adap->demux.dmx;
 194         adap->dmxdev.capabilities    = 0;
 195         if ((ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap)) < 0) {
 196                 err("dvb_dmxdev_init failed: error %d", ret);
 197                 goto err_dmx_dev;
 198         }
 199
 200         if ((ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net,
 201                                                 &adap->demux.dmx)) < 0) {
 202                 err("dvb_net_init failed: error %d", ret);
 203                 goto err_net_init;
 204         }
 205
 206         adap->state |= DVB_USB_ADAP_STATE_DVB;
 207         return 0;
 208
 209 err_net_init:
 210         dvb_dmxdev_release(&adap->dmxdev);
 211 err_dmx_dev:
 212         dvb_dmx_release(&adap->demux);
 213 err_dmx:
 214         dvb_usb_media_device_unregister(adap);
 215 err_mc:
 216         dvb_unregister_adapter(&adap->dvb_adap);
 217 err:
 218         return ret;
 219 }
 220
 221 int dvb_usb_adapter_dvb_exit(struct dvb_usb_adapter *adap)
 222 {
 223         if (adap->state & DVB_USB_ADAP_STATE_DVB) {
 224                 deb_info("unregistering DVB part\n");
 225                 dvb_net_release(&adap->dvb_net);
 226                 adap->demux.dmx.close(&adap->demux.dmx);
 227                 dvb_dmxdev_release(&adap->dmxdev);
 228                 dvb_dmx_release(&adap->demux);
 229                 dvb_usb_media_device_unregister(adap);
 230                 dvb_unregister_adapter(&adap->dvb_adap);
 231                 adap->state &= ~DVB_USB_ADAP_STATE_DVB;
 232         }
 233         return 0;
 234 }
 235
 236 static int dvb_usb_set_active_fe(struct dvb_frontend *fe, int onoff)
 237 {
 238         struct dvb_usb_adapter *adap = fe->dvb->priv;
 239
 240         int ret = (adap->props.frontend_ctrl) ?
 241                 adap->props.frontend_ctrl(fe, onoff) : 0;
 242
 243         if (ret < 0) {
 244                 err("frontend_ctrl request failed");
 245                 return ret;
 246         }
 247         if (onoff)
 248                 adap->active_fe = fe->id;
 249
 250         return 0;
 251 }
 252
 253 static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
 254 {
 255         struct dvb_usb_adapter *adap = fe->dvb->priv;
 256
 257         dvb_usb_device_power_ctrl(adap->dev, 1);
 258
 259         dvb_usb_set_active_fe(fe, 1);
 260
 261         if (adap->fe_adap[fe->id].fe_init)
 262                 adap->fe_adap[fe->id].fe_init(fe);
 263
 264         return 0;
 265 }
 266
 267 static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
 268 {
 269         struct dvb_usb_adapter *adap = fe->dvb->priv;
 270
 271         if (adap->fe_adap[fe->id].fe_sleep)
 272                 adap->fe_adap[fe->id].fe_sleep(fe);
 273
 274         dvb_usb_set_active_fe(fe, 0);
 275
 276         return dvb_usb_device_power_ctrl(adap->dev, 0);
 277 }
 278
 279 int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap)
 280 {
 281         int ret, i;
 282
 283         /* register all given adapter frontends */
 284         for (i = 0; i < adap->props.num_frontends; i++) {
 285
 286                 if (adap->props.fe[i].frontend_attach == NULL) {
 287                         err("strange: '%s' #%d,%d "
 288                             "doesn't want to attach a frontend.",
 289                             adap->dev->desc->name, adap->id, i);
 290
 291                         return 0;
 292                 }
 293
 294                 ret = adap->props.fe[i].frontend_attach(adap);
 295                 if (ret || adap->fe_adap[i].fe == NULL) {
 296                         /* only print error when there is no FE at all */
 297                         if (i == 0)
 298                                 err("no frontend was attached by '%s'",
 299                                         adap->dev->desc->name);
 300
 301                         return 0;
 302                 }
 303
 304                 adap->fe_adap[i].fe->id = i;
 305
 306                 /* re-assign sleep and wakeup functions */
 307                 adap->fe_adap[i].fe_init = adap->fe_adap[i].fe->ops.init;
 308                 adap->fe_adap[i].fe->ops.init  = dvb_usb_fe_wakeup;
 309                 adap->fe_adap[i].fe_sleep = adap->fe_adap[i].fe->ops.sleep;
 310                 adap->fe_adap[i].fe->ops.sleep = dvb_usb_fe_sleep;
 311
 312                 if (dvb_register_frontend(&adap->dvb_adap, adap->fe_adap[i].fe)) {
 313                         err("Frontend %d registration failed.", i);
 314                         dvb_frontend_detach(adap->fe_adap[i].fe);
 315                         adap->fe_adap[i].fe = NULL;
 316                         /* In error case, do not try register more FEs,
 317                          * still leaving already registered FEs alive. */
 318                         if (i == 0)
 319                                 return -ENODEV;
 320                         else
 321                                 return 0;
 322                 }
 323
 324                 /* only attach the tuner if the demod is there */
 325                 if (adap->props.fe[i].tuner_attach != NULL)
 326                         adap->props.fe[i].tuner_attach(adap);
 327
 328                 adap->num_frontends_initialized++;
 329         }
 330         if (ret)
 331                 return ret;
 332
 333         ret = dvb_create_media_graph(&adap->dvb_adap, true);
 334         if (ret)
 335                 return ret;
 336
 337         ret = dvb_usb_media_device_register(adap);
 338
 339         return ret;
 340 }
 341
 342 int dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter *adap)
 343 {
 344         int i = adap->num_frontends_initialized - 1;
 345
 346         /* unregister all given adapter frontends */
 347         for (; i >= 0; i--) {
 348                 if (adap->fe_adap[i].fe != NULL) {
 349                         dvb_unregister_frontend(adap->fe_adap[i].fe);
 350                         dvb_frontend_detach(adap->fe_adap[i].fe);
 351                 }
 352         }
 353         adap->num_frontends_initialized = 0;
 354
 355         return 0;
 356 }