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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* dvb-usb-dvb.c is part of the DVB USB library.
   3  *
   4  * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
   5  * see dvb-usb-init.c for copyright information.
   6  *
   7  * This file contains functions for initializing and handling the
   8  * linux-dvb API.
   9  */
  10 #include "dvb-usb-common.h"
  11 #include <media/media-device.h>
  12
  13 /* does the complete input transfer handling */
  14 static int dvb_usb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
  15 {
  16         struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
  17         int newfeedcount, ret;
  18
  19         if (adap == NULL)
  20                 return -ENODEV;
  21
  22         if ((adap->active_fe < 0) ||
  23             (adap->active_fe >= adap->num_frontends_initialized)) {
  24                 return -EINVAL;
  25         }
  26
  27         newfeedcount = adap->feedcount + (onoff ? 1 : -1);
  28
  29         /* stop feed before setting a new pid if there will be no pid anymore */
  30         if (newfeedcount == 0) {
  31                 deb_ts("stop feeding\n");
  32                 usb_urb_kill(&adap->fe_adap[adap->active_fe].stream);
  33
  34                 if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
  35                         ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 0);
  36                         if (ret < 0) {
  37                                 err("error while stopping stream.");
  38                                 return ret;
  39                         }
  40                 }
  41         }
  42
  43         adap->feedcount = newfeedcount;
  44
  45         /* activate the pid on the device specific pid_filter */
  46         deb_ts("setting pid (%s): %5d %04x at index %d '%s'\n",
  47                 adap->fe_adap[adap->active_fe].pid_filtering ?
  48                 "yes" : "no", dvbdmxfeed->pid, dvbdmxfeed->pid,
  49                 dvbdmxfeed->index, onoff ? "on" : "off");
  50         if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
  51                 adap->fe_adap[adap->active_fe].pid_filtering &&
  52                 adap->props.fe[adap->active_fe].pid_filter != NULL)
  53                 adap->props.fe[adap->active_fe].pid_filter(adap, dvbdmxfeed->index, dvbdmxfeed->pid, onoff);
  54
  55         /* start the feed if this was the first feed and there is still a feed
  56          * for reception.
  57          */
  58         if (adap->feedcount == onoff && adap->feedcount > 0) {
  59                 deb_ts("controlling pid parser\n");
  60                 if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
  61                         adap->props.fe[adap->active_fe].caps &
  62                         DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF &&
  63                         adap->props.fe[adap->active_fe].pid_filter_ctrl != NULL) {
  64                         ret = adap->props.fe[adap->active_fe].pid_filter_ctrl(adap,
  65                                 adap->fe_adap[adap->active_fe].pid_filtering);
  66                         if (ret < 0) {
  67                                 err("could not handle pid_parser");
  68                                 return ret;
  69                         }
  70                 }
  71                 deb_ts("start feeding\n");
  72                 if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
  73                         ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 1);
  74                         if (ret < 0) {
  75                                 err("error while enabling fifo.");
  76                                 return ret;
  77                         }
  78                 }
  79
  80                 deb_ts("submitting all URBs\n");
  81                 usb_urb_submit(&adap->fe_adap[adap->active_fe].stream);
  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         mutex_lock(&adap->dvb_adap.mdev_lock);
 135
 136         media_device_unregister(adap->dvb_adap.mdev);
 137         media_device_cleanup(adap->dvb_adap.mdev);
 138         kfree(adap->dvb_adap.mdev);
 139         adap->dvb_adap.mdev = NULL;
 140
 141         mutex_unlock(&adap->dvb_adap.mdev_lock);
 142 #endif
 143 }
 144
 145 int dvb_usb_adapter_dvb_init(struct dvb_usb_adapter *adap, short *adapter_nums)
 146 {
 147         int i;
 148         int ret = dvb_register_adapter(&adap->dvb_adap, adap->dev->desc->name,
 149                                        adap->dev->owner, &adap->dev->udev->dev,
 150                                        adapter_nums);
 151
 152         if (ret < 0) {
 153                 deb_info("dvb_register_adapter failed: error %d", ret);
 154                 goto err;
 155         }
 156         adap->dvb_adap.priv = adap;
 157
 158         ret = dvb_usb_media_device_init(adap);
 159         if (ret < 0) {
 160                 deb_info("dvb_usb_media_device_init failed: error %d", ret);
 161                 goto err_mc;
 162         }
 163
 164         if (adap->dev->props.read_mac_address) {
 165                 if (adap->dev->props.read_mac_address(adap->dev, adap->dvb_adap.proposed_mac) == 0)
 166                         info("MAC address: %pM", adap->dvb_adap.proposed_mac);
 167                 else
 168                         err("MAC address reading failed.");
 169         }
 170
 171
 172         adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
 173         adap->demux.priv             = adap;
 174
 175         adap->demux.filternum        = 0;
 176         for (i = 0; i < adap->props.num_frontends; i++) {
 177                 if (adap->demux.filternum < adap->fe_adap[i].max_feed_count)
 178                         adap->demux.filternum = adap->fe_adap[i].max_feed_count;
 179         }
 180         adap->demux.feednum          = adap->demux.filternum;
 181         adap->demux.start_feed       = dvb_usb_start_feed;
 182         adap->demux.stop_feed        = dvb_usb_stop_feed;
 183         adap->demux.write_to_decoder = NULL;
 184         if ((ret = dvb_dmx_init(&adap->demux)) < 0) {
 185                 err("dvb_dmx_init failed: error %d", ret);
 186                 goto err_dmx;
 187         }
 188
 189         adap->dmxdev.filternum       = adap->demux.filternum;
 190         adap->dmxdev.demux           = &adap->demux.dmx;
 191         adap->dmxdev.capabilities    = 0;
 192         if ((ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap)) < 0) {
 193                 err("dvb_dmxdev_init failed: error %d", ret);
 194                 goto err_dmx_dev;
 195         }
 196
 197         if ((ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net,
 198                                                 &adap->demux.dmx)) < 0) {
 199                 err("dvb_net_init failed: error %d", ret);
 200                 goto err_net_init;
 201         }
 202
 203         adap->state |= DVB_USB_ADAP_STATE_DVB;
 204         return 0;
 205
 206 err_net_init:
 207         dvb_dmxdev_release(&adap->dmxdev);
 208 err_dmx_dev:
 209         dvb_dmx_release(&adap->demux);
 210 err_dmx:
 211         dvb_usb_media_device_unregister(adap);
 212 err_mc:
 213         dvb_unregister_adapter(&adap->dvb_adap);
 214 err:
 215         return ret;
 216 }
 217
 218 int dvb_usb_adapter_dvb_exit(struct dvb_usb_adapter *adap)
 219 {
 220         if (adap->state & DVB_USB_ADAP_STATE_DVB) {
 221                 deb_info("unregistering DVB part\n");
 222                 dvb_net_release(&adap->dvb_net);
 223                 adap->demux.dmx.close(&adap->demux.dmx);
 224                 dvb_dmxdev_release(&adap->dmxdev);
 225                 dvb_dmx_release(&adap->demux);
 226                 dvb_usb_media_device_unregister(adap);
 227                 dvb_unregister_adapter(&adap->dvb_adap);
 228                 adap->state &= ~DVB_USB_ADAP_STATE_DVB;
 229         }
 230         return 0;
 231 }
 232
 233 static int dvb_usb_set_active_fe(struct dvb_frontend *fe, int onoff)
 234 {
 235         struct dvb_usb_adapter *adap = fe->dvb->priv;
 236
 237         int ret = (adap->props.frontend_ctrl) ?
 238                 adap->props.frontend_ctrl(fe, onoff) : 0;
 239
 240         if (ret < 0) {
 241                 err("frontend_ctrl request failed");
 242                 return ret;
 243         }
 244         if (onoff)
 245                 adap->active_fe = fe->id;
 246
 247         return 0;
 248 }
 249
 250 static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
 251 {
 252         struct dvb_usb_adapter *adap = fe->dvb->priv;
 253
 254         dvb_usb_device_power_ctrl(adap->dev, 1);
 255
 256         dvb_usb_set_active_fe(fe, 1);
 257
 258         if (adap->fe_adap[fe->id].fe_init)
 259                 adap->fe_adap[fe->id].fe_init(fe);
 260
 261         return 0;
 262 }
 263
 264 static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
 265 {
 266         struct dvb_usb_adapter *adap = fe->dvb->priv;
 267
 268         if (adap->fe_adap[fe->id].fe_sleep)
 269                 adap->fe_adap[fe->id].fe_sleep(fe);
 270
 271         dvb_usb_set_active_fe(fe, 0);
 272
 273         return dvb_usb_device_power_ctrl(adap->dev, 0);
 274 }
 275
 276 int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap)
 277 {
 278         int ret, i;
 279
 280         /* register all given adapter frontends */
 281         for (i = 0; i < adap->props.num_frontends; i++) {
 282
 283                 if (adap->props.fe[i].frontend_attach == NULL) {
 284                         err("strange: '%s' #%d,%d doesn't want to attach a frontend.",
 285                             adap->dev->desc->name, adap->id, i);
 286
 287                         return 0;
 288                 }
 289
 290                 ret = adap->props.fe[i].frontend_attach(adap);
 291                 if (ret || adap->fe_adap[i].fe == NULL) {
 292                         /* only print error when there is no FE at all */
 293                         if (i == 0)
 294                                 err("no frontend was attached by '%s'",
 295                                         adap->dev->desc->name);
 296
 297                         return 0;
 298                 }
 299
 300                 adap->fe_adap[i].fe->id = i;
 301
 302                 /* re-assign sleep and wakeup functions */
 303                 adap->fe_adap[i].fe_init = adap->fe_adap[i].fe->ops.init;
 304                 adap->fe_adap[i].fe->ops.init  = dvb_usb_fe_wakeup;
 305                 adap->fe_adap[i].fe_sleep = adap->fe_adap[i].fe->ops.sleep;
 306                 adap->fe_adap[i].fe->ops.sleep = dvb_usb_fe_sleep;
 307
 308                 if (dvb_register_frontend(&adap->dvb_adap, adap->fe_adap[i].fe)) {
 309                         err("Frontend %d registration failed.", i);
 310                         dvb_frontend_detach(adap->fe_adap[i].fe);
 311                         adap->fe_adap[i].fe = NULL;
 312                         /* In error case, do not try register more FEs,
 313                          * still leaving already registered FEs alive. */
 314                         if (i == 0)
 315                                 return -ENODEV;
 316                         else
 317                                 return 0;
 318                 }
 319
 320                 /* only attach the tuner if the demod is there */
 321                 if (adap->props.fe[i].tuner_attach != NULL)
 322                         adap->props.fe[i].tuner_attach(adap);
 323
 324                 adap->num_frontends_initialized++;
 325         }
 326
 327         ret = dvb_create_media_graph(&adap->dvb_adap, true);
 328         if (ret)
 329                 return ret;
 330
 331         ret = dvb_usb_media_device_register(adap);
 332
 333         return ret;
 334 }
 335
 336 int dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter *adap)
 337 {
 338         int i = adap->num_frontends_initialized - 1;
 339
 340         /* unregister all given adapter frontends */
 341         for (; i >= 0; i--) {
 342                 if (adap->fe_adap[i].fe != NULL) {
 343                         dvb_unregister_frontend(adap->fe_adap[i].fe);
 344                         dvb_frontend_detach(adap->fe_adap[i].fe);
 345                 }
 346         }
 347         adap->num_frontends_initialized = 0;
 348
 349         return 0;
 350 }