kernel/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,
  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 void dvb_usb_media_device_register(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         int ret;
 105
 106         mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
 107         if (!mdev)
 108                 return;
 109
 110         mdev->dev = &udev->dev;
 111         strlcpy(mdev->model, d->desc->name, sizeof(mdev->model));
 112         if (udev->serial)
 113                 strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial));
 114         strcpy(mdev->bus_info, udev->devpath);
 115         mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
 116         mdev->driver_version = LINUX_VERSION_CODE;
 117
 118         ret = media_device_register(mdev);
 119         if (ret) {
 120                 dev_err(&d->udev->dev,
 121                         "Couldn't create a media device. Error: %d\n",
 122                         ret);
 123                 kfree(mdev);
 124                 return;
 125         }
 126         dvb_register_media_controller(&adap->dvb_adap, mdev);
 127
 128         dev_info(&d->udev->dev, "media controller created\n");
 129 #endif
 130 }
 131
 132 static void dvb_usb_media_device_unregister(struct dvb_usb_adapter *adap)
 133 {
 134 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 135         if (!adap->dvb_adap.mdev)
 136                 return;
 137
 138         media_device_unregister(adap->dvb_adap.mdev);
 139         kfree(adap->dvb_adap.mdev);
 140         adap->dvb_adap.mdev = NULL;
 141 #endif
 142 }
 143
 144 int dvb_usb_adapter_dvb_init(struct dvb_usb_adapter *adap, short *adapter_nums)
 145 {
 146         int i;
 147         int ret = dvb_register_adapter(&adap->dvb_adap, adap->dev->desc->name,
 148                                        adap->dev->owner, &adap->dev->udev->dev,
 149                                        adapter_nums);
 150
 151         if (ret < 0) {
 152                 deb_info("dvb_register_adapter failed: error %d", ret);
 153                 goto err;
 154         }
 155         adap->dvb_adap.priv = adap;
 156
 157         dvb_usb_media_device_register(adap);
 158
 159         if (adap->dev->props.read_mac_address) {
 160                 if (adap->dev->props.read_mac_address(adap->dev, adap->dvb_adap.proposed_mac) == 0)
 161                         info("MAC address: %pM", adap->dvb_adap.proposed_mac);
 162                 else
 163                         err("MAC address reading failed.");
 164         }
 165
 166
 167         adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
 168         adap->demux.priv             = adap;
 169
 170         adap->demux.filternum        = 0;
 171         for (i = 0; i < adap->props.num_frontends; i++) {
 172                 if (adap->demux.filternum < adap->fe_adap[i].max_feed_count)
 173                         adap->demux.filternum = adap->fe_adap[i].max_feed_count;
 174         }
 175         adap->demux.feednum          = adap->demux.filternum;
 176         adap->demux.start_feed       = dvb_usb_start_feed;
 177         adap->demux.stop_feed        = dvb_usb_stop_feed;
 178         adap->demux.write_to_decoder = NULL;
 179         if ((ret = dvb_dmx_init(&adap->demux)) < 0) {
 180                 err("dvb_dmx_init failed: error %d", ret);
 181                 goto err_dmx;
 182         }
 183
 184         adap->dmxdev.filternum       = adap->demux.filternum;
 185         adap->dmxdev.demux           = &adap->demux.dmx;
 186         adap->dmxdev.capabilities    = 0;
 187         if ((ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap)) < 0) {
 188                 err("dvb_dmxdev_init failed: error %d", ret);
 189                 goto err_dmx_dev;
 190         }
 191
 192         if ((ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net,
 193                                                 &adap->demux.dmx)) < 0) {
 194                 err("dvb_net_init failed: error %d", ret);
 195                 goto err_net_init;
 196         }
 197
 198         adap->state |= DVB_USB_ADAP_STATE_DVB;
 199         return 0;
 200
 201 err_net_init:
 202         dvb_dmxdev_release(&adap->dmxdev);
 203 err_dmx_dev:
 204         dvb_dmx_release(&adap->demux);
 205 err_dmx:
 206         dvb_usb_media_device_unregister(adap);
 207         dvb_unregister_adapter(&adap->dvb_adap);
 208 err:
 209         return ret;
 210 }
 211
 212 int dvb_usb_adapter_dvb_exit(struct dvb_usb_adapter *adap)
 213 {
 214         if (adap->state & DVB_USB_ADAP_STATE_DVB) {
 215                 deb_info("unregistering DVB part\n");
 216                 dvb_net_release(&adap->dvb_net);
 217                 adap->demux.dmx.close(&adap->demux.dmx);
 218                 dvb_dmxdev_release(&adap->dmxdev);
 219                 dvb_dmx_release(&adap->demux);
 220                 dvb_usb_media_device_unregister(adap);
 221                 dvb_unregister_adapter(&adap->dvb_adap);
 222                 adap->state &= ~DVB_USB_ADAP_STATE_DVB;
 223         }
 224         return 0;
 225 }
 226
 227 static int dvb_usb_set_active_fe(struct dvb_frontend *fe, int onoff)
 228 {
 229         struct dvb_usb_adapter *adap = fe->dvb->priv;
 230
 231         int ret = (adap->props.frontend_ctrl) ?
 232                 adap->props.frontend_ctrl(fe, onoff) : 0;
 233
 234         if (ret < 0) {
 235                 err("frontend_ctrl request failed");
 236                 return ret;
 237         }
 238         if (onoff)
 239                 adap->active_fe = fe->id;
 240
 241         return 0;
 242 }
 243
 244 static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
 245 {
 246         struct dvb_usb_adapter *adap = fe->dvb->priv;
 247
 248         dvb_usb_device_power_ctrl(adap->dev, 1);
 249
 250         dvb_usb_set_active_fe(fe, 1);
 251
 252         if (adap->fe_adap[fe->id].fe_init)
 253                 adap->fe_adap[fe->id].fe_init(fe);
 254
 255         return 0;
 256 }
 257
 258 static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
 259 {
 260         struct dvb_usb_adapter *adap = fe->dvb->priv;
 261
 262         if (adap->fe_adap[fe->id].fe_sleep)
 263                 adap->fe_adap[fe->id].fe_sleep(fe);
 264
 265         dvb_usb_set_active_fe(fe, 0);
 266
 267         return dvb_usb_device_power_ctrl(adap->dev, 0);
 268 }
 269
 270 int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap)
 271 {
 272         int ret, i;
 273
 274         /* register all given adapter frontends */
 275         for (i = 0; i < adap->props.num_frontends; i++) {
 276
 277                 if (adap->props.fe[i].frontend_attach == NULL) {
 278                         err("strange: '%s' #%d,%d "
 279                             "doesn't want to attach a frontend.",
 280                             adap->dev->desc->name, adap->id, i);
 281
 282                         return 0;
 283                 }
 284
 285                 ret = adap->props.fe[i].frontend_attach(adap);
 286                 if (ret || adap->fe_adap[i].fe == NULL) {
 287                         /* only print error when there is no FE at all */
 288                         if (i == 0)
 289                                 err("no frontend was attached by '%s'",
 290                                         adap->dev->desc->name);
 291
 292                         return 0;
 293                 }
 294
 295                 adap->fe_adap[i].fe->id = i;
 296
 297                 /* re-assign sleep and wakeup functions */
 298                 adap->fe_adap[i].fe_init = adap->fe_adap[i].fe->ops.init;
 299                 adap->fe_adap[i].fe->ops.init  = dvb_usb_fe_wakeup;
 300                 adap->fe_adap[i].fe_sleep = adap->fe_adap[i].fe->ops.sleep;
 301                 adap->fe_adap[i].fe->ops.sleep = dvb_usb_fe_sleep;
 302
 303                 if (dvb_register_frontend(&adap->dvb_adap, adap->fe_adap[i].fe)) {
 304                         err("Frontend %d registration failed.", i);
 305                         dvb_frontend_detach(adap->fe_adap[i].fe);
 306                         adap->fe_adap[i].fe = NULL;
 307                         /* In error case, do not try register more FEs,
 308                          * still leaving already registered FEs alive. */
 309                         if (i == 0)
 310                                 return -ENODEV;
 311                         else
 312                                 return 0;
 313                 }
 314
 315                 /* only attach the tuner if the demod is there */
 316                 if (adap->props.fe[i].tuner_attach != NULL)
 317                         adap->props.fe[i].tuner_attach(adap);
 318
 319                 adap->num_frontends_initialized++;
 320         }
 321
 322         dvb_create_media_graph(&adap->dvb_adap);
 323
 324         return 0;
 325 }
 326
 327 int dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter *adap)
 328 {
 329         int i = adap->num_frontends_initialized - 1;
 330
 331         /* unregister all given adapter frontends */
 332         for (; i >= 0; i--) {
 333                 if (adap->fe_adap[i].fe != NULL) {
 334                         dvb_unregister_frontend(adap->fe_adap[i].fe);
 335                         dvb_frontend_detach(adap->fe_adap[i].fe);
 336                 }
 337         }
 338         adap->num_frontends_initialized = 0;
 339
 340         return 0;
 341 }