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 #include <media/media-device.h>
  11
  12 /* does the complete input transfer handling */
  13 static int dvb_usb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
  14 {
  15         struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
  16         int newfeedcount, ret;
  17
  18         if (adap == NULL)
  19                 return -ENODEV;
  20
  21         if ((adap->active_fe < 0) ||
  22             (adap->active_fe >= adap->num_frontends_initialized)) {
  23                 return -EINVAL;
  24         }
  25
  26         newfeedcount = adap->feedcount + (onoff ? 1 : -1);
  27
  28         /* stop feed before setting a new pid if there will be no pid anymore */
  29         if (newfeedcount == 0) {
  30                 deb_ts("stop feeding\n");
  31                 usb_urb_kill(&adap->fe_adap[adap->active_fe].stream);
  32
  33                 if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
  34                         ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 0);
  35                         if (ret < 0) {
  36                                 err("error while stopping stream.");
  37                                 return ret;
  38                         }
  39                 }
  40         }
  41
  42         adap->feedcount = newfeedcount;
  43
  44         /* activate the pid on the device specific pid_filter */
  45         deb_ts("setting pid (%s): %5d %04x at index %d '%s'\n",
  46                 adap->fe_adap[adap->active_fe].pid_filtering ?
  47                 "yes" : "no", dvbdmxfeed->pid, dvbdmxfeed->pid,
  48                 dvbdmxfeed->index, onoff ? "on" : "off");
  49         if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
  50                 adap->fe_adap[adap->active_fe].pid_filtering &&
  51                 adap->props.fe[adap->active_fe].pid_filter != NULL)
  52                 adap->props.fe[adap->active_fe].pid_filter(adap, dvbdmxfeed->index, dvbdmxfeed->pid, onoff);
  53
  54         /* start the feed if this was the first feed and there is still a feed
  55          * for reception.
  56          */
  57         if (adap->feedcount == onoff && adap->feedcount > 0) {
  58                 deb_ts("submitting all URBs\n");
  59                 usb_urb_submit(&adap->fe_adap[adap->active_fe].stream);
  60
  61                 deb_ts("controlling pid parser\n");
  62                 if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
  63                         adap->props.fe[adap->active_fe].caps &
  64                         DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF &&
  65                         adap->props.fe[adap->active_fe].pid_filter_ctrl != NULL) {
  66                         ret = adap->props.fe[adap->active_fe].pid_filter_ctrl(adap,
  67                                 adap->fe_adap[adap->active_fe].pid_filtering);
  68                         if (ret < 0) {
  69                                 err("could not handle pid_parser");
  70                                 return ret;
  71                         }
  72                 }
  73                 deb_ts("start feeding\n");
  74                 if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
  75                         ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 1);
  76                         if (ret < 0) {
  77                                 err("error while enabling fifo.");
  78                                 return ret;
  79                         }
  80                 }
  81
  82         }
  83         return 0;
  84 }
  85
  86 static int dvb_usb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
  87 {
  88         deb_ts("start pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid,
  89                dvbdmxfeed->type);
  90         return dvb_usb_ctrl_feed(dvbdmxfeed, 1);
  91 }
  92
  93 static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
  94 {
  95         deb_ts("stop pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid, dvbdmxfeed->type);
  96         return dvb_usb_ctrl_feed(dvbdmxfeed, 0);
  97 }
  98
  99 static int dvb_usb_media_device_init(struct dvb_usb_adapter *adap)
 100 {
 101 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 102         struct media_device *mdev;
 103         struct dvb_usb_device *d = adap->dev;
 104         struct usb_device *udev = d->udev;
 105
 106         mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
 107         if (!mdev)
 108                 return -ENOMEM;
 109
 110         media_device_usb_init(mdev, udev, d->desc->name);
 111
 112         dvb_register_media_controller(&adap->dvb_adap, mdev);
 113
 114         dev_info(&d->udev->dev, "media controller created\n");
 115 #endif
 116         return 0;
 117 }
 118
 119 static int  dvb_usb_media_device_register(struct dvb_usb_adapter *adap)
 120 {
 121 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 122         return media_device_register(adap->dvb_adap.mdev);
 123 #else
 124         return 0;
 125 #endif
 126 }
 127
 128 static void dvb_usb_media_device_unregister(struct dvb_usb_adapter *adap)
 129 {
 130 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 131         if (!adap->dvb_adap.mdev)
 132                 return;
 133
 134         media_device_unregister(adap->dvb_adap.mdev);
 135         media_device_cleanup(adap->dvb_adap.mdev);
 136         kfree(adap->dvb_adap.mdev);
 137         adap->dvb_adap.mdev = NULL;
 138 #endif
 139 }
 140
 141 int dvb_usb_adapter_dvb_init(struct dvb_usb_adapter *adap, short *adapter_nums)
 142 {
 143         int i;
 144         int ret = dvb_register_adapter(&adap->dvb_adap, adap->dev->desc->name,
 145                                        adap->dev->owner, &adap->dev->udev->dev,
 146                                        adapter_nums);
 147
 148         if (ret < 0) {
 149                 deb_info("dvb_register_adapter failed: error %d", ret);
 150                 goto err;
 151         }
 152         adap->dvb_adap.priv = adap;
 153
 154         ret = dvb_usb_media_device_init(adap);
 155         if (ret < 0) {
 156                 deb_info("dvb_usb_media_device_init failed: error %d", ret);
 157                 goto err_mc;
 158         }
 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 err_mc:
 209         dvb_unregister_adapter(&adap->dvb_adap);
 210 err:
 211         return ret;
 212 }
 213
 214 int dvb_usb_adapter_dvb_exit(struct dvb_usb_adapter *adap)
 215 {
 216         if (adap->state & DVB_USB_ADAP_STATE_DVB) {
 217                 deb_info("unregistering DVB part\n");
 218                 dvb_net_release(&adap->dvb_net);
 219                 adap->demux.dmx.close(&adap->demux.dmx);
 220                 dvb_dmxdev_release(&adap->dmxdev);
 221                 dvb_dmx_release(&adap->demux);
 222                 dvb_usb_media_device_unregister(adap);
 223                 dvb_unregister_adapter(&adap->dvb_adap);
 224                 adap->state &= ~DVB_USB_ADAP_STATE_DVB;
 225         }
 226         return 0;
 227 }
 228
 229 static int dvb_usb_set_active_fe(struct dvb_frontend *fe, int onoff)
 230 {
 231         struct dvb_usb_adapter *adap = fe->dvb->priv;
 232
 233         int ret = (adap->props.frontend_ctrl) ?
 234                 adap->props.frontend_ctrl(fe, onoff) : 0;
 235
 236         if (ret < 0) {
 237                 err("frontend_ctrl request failed");
 238                 return ret;
 239         }
 240         if (onoff)
 241                 adap->active_fe = fe->id;
 242
 243         return 0;
 244 }
 245
 246 static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
 247 {
 248         struct dvb_usb_adapter *adap = fe->dvb->priv;
 249
 250         dvb_usb_device_power_ctrl(adap->dev, 1);
 251
 252         dvb_usb_set_active_fe(fe, 1);
 253
 254         if (adap->fe_adap[fe->id].fe_init)
 255                 adap->fe_adap[fe->id].fe_init(fe);
 256
 257         return 0;
 258 }
 259
 260 static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
 261 {
 262         struct dvb_usb_adapter *adap = fe->dvb->priv;
 263
 264         if (adap->fe_adap[fe->id].fe_sleep)
 265                 adap->fe_adap[fe->id].fe_sleep(fe);
 266
 267         dvb_usb_set_active_fe(fe, 0);
 268
 269         return dvb_usb_device_power_ctrl(adap->dev, 0);
 270 }
 271
 272 int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap)
 273 {
 274         int ret, i;
 275
 276         /* register all given adapter frontends */
 277         for (i = 0; i < adap->props.num_frontends; i++) {
 278
 279                 if (adap->props.fe[i].frontend_attach == NULL) {
 280                         err("strange: '%s' #%d,%d "
 281                             "doesn't want to attach a frontend.",
 282                             adap->dev->desc->name, adap->id, i);
 283
 284                         return 0;
 285                 }
 286
 287                 ret = adap->props.fe[i].frontend_attach(adap);
 288                 if (ret || adap->fe_adap[i].fe == NULL) {
 289                         /* only print error when there is no FE at all */
 290                         if (i == 0)
 291                                 err("no frontend was attached by '%s'",
 292                                         adap->dev->desc->name);
 293
 294                         return 0;
 295                 }
 296
 297                 adap->fe_adap[i].fe->id = i;
 298
 299                 /* re-assign sleep and wakeup functions */
 300                 adap->fe_adap[i].fe_init = adap->fe_adap[i].fe->ops.init;
 301                 adap->fe_adap[i].fe->ops.init  = dvb_usb_fe_wakeup;
 302                 adap->fe_adap[i].fe_sleep = adap->fe_adap[i].fe->ops.sleep;
 303                 adap->fe_adap[i].fe->ops.sleep = dvb_usb_fe_sleep;
 304
 305                 if (dvb_register_frontend(&adap->dvb_adap, adap->fe_adap[i].fe)) {
 306                         err("Frontend %d registration failed.", i);
 307                         dvb_frontend_detach(adap->fe_adap[i].fe);
 308                         adap->fe_adap[i].fe = NULL;
 309                         /* In error case, do not try register more FEs,
 310                          * still leaving already registered FEs alive. */
 311                         if (i == 0)
 312                                 return -ENODEV;
 313                         else
 314                                 return 0;
 315                 }
 316
 317                 /* only attach the tuner if the demod is there */
 318                 if (adap->props.fe[i].tuner_attach != NULL)
 319                         adap->props.fe[i].tuner_attach(adap);
 320
 321                 adap->num_frontends_initialized++;
 322         }
 323
 324         ret = dvb_create_media_graph(&adap->dvb_adap, true);
 325         if (ret)
 326                 return ret;
 327
 328         ret = dvb_usb_media_device_register(adap);
 329
 330         return ret;
 331 }
 332
 333 int dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter *adap)
 334 {
 335         int i = adap->num_frontends_initialized - 1;
 336
 337         /* unregister all given adapter frontends */
 338         for (; i >= 0; i--) {
 339                 if (adap->fe_adap[i].fe != NULL) {
 340                         dvb_unregister_frontend(adap->fe_adap[i].fe);
 341                         dvb_frontend_detach(adap->fe_adap[i].fe);
 342                 }
 343         }
 344         adap->num_frontends_initialized = 0;
 345
 346         return 0;
 347 }