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("submitting all URBs\n");
  60                 usb_urb_submit(&adap->fe_adap[adap->active_fe].stream);
  61
  62                 deb_ts("controlling pid parser\n");
  63                 if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
  64                         adap->props.fe[adap->active_fe].caps &
  65                         DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF &&
  66                         adap->props.fe[adap->active_fe].pid_filter_ctrl != NULL) {
  67                         ret = adap->props.fe[adap->active_fe].pid_filter_ctrl(adap,
  68                                 adap->fe_adap[adap->active_fe].pid_filtering);
  69                         if (ret < 0) {
  70                                 err("could not handle pid_parser");
  71                                 return ret;
  72                         }
  73                 }
  74                 deb_ts("start feeding\n");
  75                 if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
  76                         ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 1);
  77                         if (ret < 0) {
  78                                 err("error while enabling fifo.");
  79                                 return ret;
  80                         }
  81                 }
  82
  83         }
  84         return 0;
  85 }
  86
  87 static int dvb_usb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
  88 {
  89         deb_ts("start pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid,
  90                dvbdmxfeed->type);
  91         return dvb_usb_ctrl_feed(dvbdmxfeed, 1);
  92 }
  93
  94 static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
  95 {
  96         deb_ts("stop pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid, dvbdmxfeed->type);
  97         return dvb_usb_ctrl_feed(dvbdmxfeed, 0);
  98 }
  99
 100 static int dvb_usb_media_device_init(struct dvb_usb_adapter *adap)
 101 {
 102 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 103         struct media_device *mdev;
 104         struct dvb_usb_device *d = adap->dev;
 105         struct usb_device *udev = d->udev;
 106
 107         mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
 108         if (!mdev)
 109                 return -ENOMEM;
 110
 111         media_device_usb_init(mdev, udev, d->desc->name);
 112
 113         dvb_register_media_controller(&adap->dvb_adap, mdev);
 114
 115         dev_info(&d->udev->dev, "media controller created\n");
 116 #endif
 117         return 0;
 118 }
 119
 120 static int  dvb_usb_media_device_register(struct dvb_usb_adapter *adap)
 121 {
 122 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 123         return media_device_register(adap->dvb_adap.mdev);
 124 #else
 125         return 0;
 126 #endif
 127 }
 128
 129 static void dvb_usb_media_device_unregister(struct dvb_usb_adapter *adap)
 130 {
 131 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 132         if (!adap->dvb_adap.mdev)
 133                 return;
 134
 135         media_device_unregister(adap->dvb_adap.mdev);
 136         media_device_cleanup(adap->dvb_adap.mdev);
 137         kfree(adap->dvb_adap.mdev);
 138         adap->dvb_adap.mdev = NULL;
 139 #endif
 140 }
 141
 142 int dvb_usb_adapter_dvb_init(struct dvb_usb_adapter *adap, short *adapter_nums)
 143 {
 144         int i;
 145         int ret = dvb_register_adapter(&adap->dvb_adap, adap->dev->desc->name,
 146                                        adap->dev->owner, &adap->dev->udev->dev,
 147                                        adapter_nums);
 148
 149         if (ret < 0) {
 150                 deb_info("dvb_register_adapter failed: error %d", ret);
 151                 goto err;
 152         }
 153         adap->dvb_adap.priv = adap;
 154
 155         ret = dvb_usb_media_device_init(adap);
 156         if (ret < 0) {
 157                 deb_info("dvb_usb_media_device_init failed: error %d", ret);
 158                 goto err_mc;
 159         }
 160
 161         if (adap->dev->props.read_mac_address) {
 162                 if (adap->dev->props.read_mac_address(adap->dev, adap->dvb_adap.proposed_mac) == 0)
 163                         info("MAC address: %pM", adap->dvb_adap.proposed_mac);
 164                 else
 165                         err("MAC address reading failed.");
 166         }
 167
 168
 169         adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
 170         adap->demux.priv             = adap;
 171
 172         adap->demux.filternum        = 0;
 173         for (i = 0; i < adap->props.num_frontends; i++) {
 174                 if (adap->demux.filternum < adap->fe_adap[i].max_feed_count)
 175                         adap->demux.filternum = adap->fe_adap[i].max_feed_count;
 176         }
 177         adap->demux.feednum          = adap->demux.filternum;
 178         adap->demux.start_feed       = dvb_usb_start_feed;
 179         adap->demux.stop_feed        = dvb_usb_stop_feed;
 180         adap->demux.write_to_decoder = NULL;
 181         if ((ret = dvb_dmx_init(&adap->demux)) < 0) {
 182                 err("dvb_dmx_init failed: error %d", ret);
 183                 goto err_dmx;
 184         }
 185
 186         adap->dmxdev.filternum       = adap->demux.filternum;
 187         adap->dmxdev.demux           = &adap->demux.dmx;
 188         adap->dmxdev.capabilities    = 0;
 189         if ((ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap)) < 0) {
 190                 err("dvb_dmxdev_init failed: error %d", ret);
 191                 goto err_dmx_dev;
 192         }
 193
 194         if ((ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net,
 195                                                 &adap->demux.dmx)) < 0) {
 196                 err("dvb_net_init failed: error %d", ret);
 197                 goto err_net_init;
 198         }
 199
 200         adap->state |= DVB_USB_ADAP_STATE_DVB;
 201         return 0;
 202
 203 err_net_init:
 204         dvb_dmxdev_release(&adap->dmxdev);
 205 err_dmx_dev:
 206         dvb_dmx_release(&adap->demux);
 207 err_dmx:
 208         dvb_usb_media_device_unregister(adap);
 209 err_mc:
 210         dvb_unregister_adapter(&adap->dvb_adap);
 211 err:
 212         return ret;
 213 }
 214
 215 int dvb_usb_adapter_dvb_exit(struct dvb_usb_adapter *adap)
 216 {
 217         if (adap->state & DVB_USB_ADAP_STATE_DVB) {
 218                 deb_info("unregistering DVB part\n");
 219                 dvb_net_release(&adap->dvb_net);
 220                 adap->demux.dmx.close(&adap->demux.dmx);
 221                 dvb_dmxdev_release(&adap->dmxdev);
 222                 dvb_dmx_release(&adap->demux);
 223                 dvb_usb_media_device_unregister(adap);
 224                 dvb_unregister_adapter(&adap->dvb_adap);
 225                 adap->state &= ~DVB_USB_ADAP_STATE_DVB;
 226         }
 227         return 0;
 228 }
 229
 230 static int dvb_usb_set_active_fe(struct dvb_frontend *fe, int onoff)
 231 {
 232         struct dvb_usb_adapter *adap = fe->dvb->priv;
 233
 234         int ret = (adap->props.frontend_ctrl) ?
 235                 adap->props.frontend_ctrl(fe, onoff) : 0;
 236
 237         if (ret < 0) {
 238                 err("frontend_ctrl request failed");
 239                 return ret;
 240         }
 241         if (onoff)
 242                 adap->active_fe = fe->id;
 243
 244         return 0;
 245 }
 246
 247 static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
 248 {
 249         struct dvb_usb_adapter *adap = fe->dvb->priv;
 250
 251         dvb_usb_device_power_ctrl(adap->dev, 1);
 252
 253         dvb_usb_set_active_fe(fe, 1);
 254
 255         if (adap->fe_adap[fe->id].fe_init)
 256                 adap->fe_adap[fe->id].fe_init(fe);
 257
 258         return 0;
 259 }
 260
 261 static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
 262 {
 263         struct dvb_usb_adapter *adap = fe->dvb->priv;
 264
 265         if (adap->fe_adap[fe->id].fe_sleep)
 266                 adap->fe_adap[fe->id].fe_sleep(fe);
 267
 268         dvb_usb_set_active_fe(fe, 0);
 269
 270         return dvb_usb_device_power_ctrl(adap->dev, 0);
 271 }
 272
 273 int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap)
 274 {
 275         int ret, i;
 276
 277         /* register all given adapter frontends */
 278         for (i = 0; i < adap->props.num_frontends; i++) {
 279
 280                 if (adap->props.fe[i].frontend_attach == NULL) {
 281                         err("strange: '%s' #%d,%d 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 }