linux/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c
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   1/*
   2 * DVB USB framework
   3 *
   4 * Copyright (C) 2004-6 Patrick Boettcher <patrick.boettcher@posteo.de>
   5 * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
   6 *
   7 *    This program is free software; you can redistribute it and/or modify
   8 *    it under the terms of the GNU General Public License as published by
   9 *    the Free Software Foundation; either version 2 of the License, or
  10 *    (at your option) any later version.
  11 *
  12 *    This program is distributed in the hope that it will be useful,
  13 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 *    GNU General Public License for more details.
  16 *
  17 *    You should have received a copy of the GNU General Public License along
  18 *    with this program; if not, write to the Free Software Foundation, Inc.,
  19 *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20 */
  21
  22#include "dvb_usb_common.h"
  23#include <media/media-device.h>
  24
  25static int dvb_usbv2_disable_rc_polling;
  26module_param_named(disable_rc_polling, dvb_usbv2_disable_rc_polling, int, 0644);
  27MODULE_PARM_DESC(disable_rc_polling,
  28                "disable remote control polling (default: 0)");
  29static int dvb_usb_force_pid_filter_usage;
  30module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage,
  31                int, 0444);
  32MODULE_PARM_DESC(force_pid_filter_usage,
  33                "force all DVB USB devices to use a PID filter, if any (default: 0)");
  34
  35static int dvb_usbv2_download_firmware(struct dvb_usb_device *d,
  36                const char *name)
  37{
  38        int ret;
  39        const struct firmware *fw;
  40        dev_dbg(&d->udev->dev, "%s:\n", __func__);
  41
  42        if (!d->props->download_firmware) {
  43                ret = -EINVAL;
  44                goto err;
  45        }
  46
  47        ret = request_firmware(&fw, name, &d->udev->dev);
  48        if (ret < 0) {
  49                dev_err(&d->udev->dev,
  50                                "%s: Did not find the firmware file '%s' (status %d). You can use <kernel_dir>/scripts/get_dvb_firmware to get the firmware\n",
  51                                KBUILD_MODNAME, name, ret);
  52                goto err;
  53        }
  54
  55        dev_info(&d->udev->dev, "%s: downloading firmware from file '%s'\n",
  56                        KBUILD_MODNAME, name);
  57
  58        ret = d->props->download_firmware(d, fw);
  59        release_firmware(fw);
  60        if (ret < 0)
  61                goto err;
  62
  63        return ret;
  64err:
  65        dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
  66        return ret;
  67}
  68
  69static int dvb_usbv2_i2c_init(struct dvb_usb_device *d)
  70{
  71        int ret;
  72        dev_dbg(&d->udev->dev, "%s:\n", __func__);
  73
  74        if (!d->props->i2c_algo)
  75                return 0;
  76
  77        strscpy(d->i2c_adap.name, d->name, sizeof(d->i2c_adap.name));
  78        d->i2c_adap.algo = d->props->i2c_algo;
  79        d->i2c_adap.dev.parent = &d->udev->dev;
  80        i2c_set_adapdata(&d->i2c_adap, d);
  81
  82        ret = i2c_add_adapter(&d->i2c_adap);
  83        if (ret < 0) {
  84                d->i2c_adap.algo = NULL;
  85                goto err;
  86        }
  87
  88        return 0;
  89err:
  90        dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
  91        return ret;
  92}
  93
  94static int dvb_usbv2_i2c_exit(struct dvb_usb_device *d)
  95{
  96        dev_dbg(&d->udev->dev, "%s:\n", __func__);
  97
  98        if (d->i2c_adap.algo)
  99                i2c_del_adapter(&d->i2c_adap);
 100
 101        return 0;
 102}
 103
 104#if IS_ENABLED(CONFIG_RC_CORE)
 105static void dvb_usb_read_remote_control(struct work_struct *work)
 106{
 107        struct dvb_usb_device *d = container_of(work,
 108                        struct dvb_usb_device, rc_query_work.work);
 109        int ret;
 110
 111        /*
 112         * When the parameter has been set to 1 via sysfs while the
 113         * driver was running, or when bulk mode is enabled after IR init.
 114         */
 115        if (dvb_usbv2_disable_rc_polling || d->rc.bulk_mode) {
 116                d->rc_polling_active = false;
 117                return;
 118        }
 119
 120        ret = d->rc.query(d);
 121        if (ret < 0) {
 122                dev_err(&d->udev->dev, "%s: rc.query() failed=%d\n",
 123                                KBUILD_MODNAME, ret);
 124                d->rc_polling_active = false;
 125                return; /* stop polling */
 126        }
 127
 128        schedule_delayed_work(&d->rc_query_work,
 129                        msecs_to_jiffies(d->rc.interval));
 130}
 131
 132static int dvb_usbv2_remote_init(struct dvb_usb_device *d)
 133{
 134        int ret;
 135        struct rc_dev *dev;
 136        dev_dbg(&d->udev->dev, "%s:\n", __func__);
 137
 138        if (dvb_usbv2_disable_rc_polling || !d->props->get_rc_config)
 139                return 0;
 140
 141        d->rc.map_name = d->rc_map;
 142        ret = d->props->get_rc_config(d, &d->rc);
 143        if (ret < 0)
 144                goto err;
 145
 146        /* disable rc when there is no keymap defined */
 147        if (!d->rc.map_name)
 148                return 0;
 149
 150        dev = rc_allocate_device(d->rc.driver_type);
 151        if (!dev) {
 152                ret = -ENOMEM;
 153                goto err;
 154        }
 155
 156        dev->dev.parent = &d->udev->dev;
 157        dev->device_name = d->name;
 158        usb_make_path(d->udev, d->rc_phys, sizeof(d->rc_phys));
 159        strlcat(d->rc_phys, "/ir0", sizeof(d->rc_phys));
 160        dev->input_phys = d->rc_phys;
 161        usb_to_input_id(d->udev, &dev->input_id);
 162        dev->driver_name = d->props->driver_name;
 163        dev->map_name = d->rc.map_name;
 164        dev->allowed_protocols = d->rc.allowed_protos;
 165        dev->change_protocol = d->rc.change_protocol;
 166        dev->priv = d;
 167
 168        ret = rc_register_device(dev);
 169        if (ret < 0) {
 170                rc_free_device(dev);
 171                goto err;
 172        }
 173
 174        d->rc_dev = dev;
 175
 176        /* start polling if needed */
 177        if (d->rc.query && !d->rc.bulk_mode) {
 178                /* initialize a work queue for handling polling */
 179                INIT_DELAYED_WORK(&d->rc_query_work,
 180                                dvb_usb_read_remote_control);
 181                dev_info(&d->udev->dev,
 182                                "%s: schedule remote query interval to %d msecs\n",
 183                                KBUILD_MODNAME, d->rc.interval);
 184                schedule_delayed_work(&d->rc_query_work,
 185                                msecs_to_jiffies(d->rc.interval));
 186                d->rc_polling_active = true;
 187        }
 188
 189        return 0;
 190err:
 191        dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
 192        return ret;
 193}
 194
 195static int dvb_usbv2_remote_exit(struct dvb_usb_device *d)
 196{
 197        dev_dbg(&d->udev->dev, "%s:\n", __func__);
 198
 199        if (d->rc_dev) {
 200                cancel_delayed_work_sync(&d->rc_query_work);
 201                rc_unregister_device(d->rc_dev);
 202                d->rc_dev = NULL;
 203        }
 204
 205        return 0;
 206}
 207#else
 208        #define dvb_usbv2_remote_init(args...) 0
 209        #define dvb_usbv2_remote_exit(args...)
 210#endif
 211
 212static void dvb_usb_data_complete(struct usb_data_stream *stream, u8 *buf,
 213                size_t len)
 214{
 215        struct dvb_usb_adapter *adap = stream->user_priv;
 216        dvb_dmx_swfilter(&adap->demux, buf, len);
 217}
 218
 219static void dvb_usb_data_complete_204(struct usb_data_stream *stream, u8 *buf,
 220                size_t len)
 221{
 222        struct dvb_usb_adapter *adap = stream->user_priv;
 223        dvb_dmx_swfilter_204(&adap->demux, buf, len);
 224}
 225
 226static void dvb_usb_data_complete_raw(struct usb_data_stream *stream, u8 *buf,
 227                size_t len)
 228{
 229        struct dvb_usb_adapter *adap = stream->user_priv;
 230        dvb_dmx_swfilter_raw(&adap->demux, buf, len);
 231}
 232
 233static int dvb_usbv2_adapter_stream_init(struct dvb_usb_adapter *adap)
 234{
 235        dev_dbg(&adap_to_d(adap)->udev->dev, "%s: adap=%d\n", __func__,
 236                        adap->id);
 237
 238        adap->stream.udev = adap_to_d(adap)->udev;
 239        adap->stream.user_priv = adap;
 240        adap->stream.complete = dvb_usb_data_complete;
 241
 242        return usb_urb_initv2(&adap->stream, &adap->props->stream);
 243}
 244
 245static int dvb_usbv2_adapter_stream_exit(struct dvb_usb_adapter *adap)
 246{
 247        dev_dbg(&adap_to_d(adap)->udev->dev, "%s: adap=%d\n", __func__,
 248                        adap->id);
 249
 250        return usb_urb_exitv2(&adap->stream);
 251}
 252
 253static int dvb_usb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
 254{
 255        struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
 256        struct dvb_usb_device *d = adap_to_d(adap);
 257        int ret = 0;
 258        struct usb_data_stream_properties stream_props;
 259        dev_dbg(&d->udev->dev,
 260                        "%s: adap=%d active_fe=%d feed_type=%d setting pid [%s]: %04x (%04d) at index %d\n",
 261                        __func__, adap->id, adap->active_fe, dvbdmxfeed->type,
 262                        adap->pid_filtering ? "yes" : "no", dvbdmxfeed->pid,
 263                        dvbdmxfeed->pid, dvbdmxfeed->index);
 264
 265        /* wait init is done */
 266        wait_on_bit(&adap->state_bits, ADAP_INIT, TASK_UNINTERRUPTIBLE);
 267
 268        if (adap->active_fe == -1)
 269                return -EINVAL;
 270
 271        /* skip feed setup if we are already feeding */
 272        if (adap->feed_count++ > 0)
 273                goto skip_feed_start;
 274
 275        /* set 'streaming' status bit */
 276        set_bit(ADAP_STREAMING, &adap->state_bits);
 277
 278        /* resolve input and output streaming parameters */
 279        if (d->props->get_stream_config) {
 280                memcpy(&stream_props, &adap->props->stream,
 281                                sizeof(struct usb_data_stream_properties));
 282                ret = d->props->get_stream_config(adap->fe[adap->active_fe],
 283                                &adap->ts_type, &stream_props);
 284                if (ret)
 285                        dev_err(&d->udev->dev,
 286                                        "%s: get_stream_config() failed=%d\n",
 287                                        KBUILD_MODNAME, ret);
 288        } else {
 289                stream_props = adap->props->stream;
 290        }
 291
 292        switch (adap->ts_type) {
 293        case DVB_USB_FE_TS_TYPE_204:
 294                adap->stream.complete = dvb_usb_data_complete_204;
 295                break;
 296        case DVB_USB_FE_TS_TYPE_RAW:
 297                adap->stream.complete = dvb_usb_data_complete_raw;
 298                break;
 299        case DVB_USB_FE_TS_TYPE_188:
 300        default:
 301                adap->stream.complete = dvb_usb_data_complete;
 302                break;
 303        }
 304
 305        /* submit USB streaming packets */
 306        usb_urb_submitv2(&adap->stream, &stream_props);
 307
 308        /* enable HW PID filter */
 309        if (adap->pid_filtering && adap->props->pid_filter_ctrl) {
 310                ret = adap->props->pid_filter_ctrl(adap, 1);
 311                if (ret)
 312                        dev_err(&d->udev->dev,
 313                                        "%s: pid_filter_ctrl() failed=%d\n",
 314                                        KBUILD_MODNAME, ret);
 315        }
 316
 317        /* ask device to start streaming */
 318        if (d->props->streaming_ctrl) {
 319                ret = d->props->streaming_ctrl(adap->fe[adap->active_fe], 1);
 320                if (ret)
 321                        dev_err(&d->udev->dev,
 322                                        "%s: streaming_ctrl() failed=%d\n",
 323                                        KBUILD_MODNAME, ret);
 324        }
 325skip_feed_start:
 326
 327        /* add PID to device HW PID filter */
 328        if (adap->pid_filtering && adap->props->pid_filter) {
 329                ret = adap->props->pid_filter(adap, dvbdmxfeed->index,
 330                                dvbdmxfeed->pid, 1);
 331                if (ret)
 332                        dev_err(&d->udev->dev, "%s: pid_filter() failed=%d\n",
 333                                        KBUILD_MODNAME, ret);
 334        }
 335
 336        if (ret)
 337                dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
 338        return ret;
 339}
 340
 341static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
 342{
 343        struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
 344        struct dvb_usb_device *d = adap_to_d(adap);
 345        int ret = 0;
 346        dev_dbg(&d->udev->dev,
 347                        "%s: adap=%d active_fe=%d feed_type=%d setting pid [%s]: %04x (%04d) at index %d\n",
 348                        __func__, adap->id, adap->active_fe, dvbdmxfeed->type,
 349                        adap->pid_filtering ? "yes" : "no", dvbdmxfeed->pid,
 350                        dvbdmxfeed->pid, dvbdmxfeed->index);
 351
 352        if (adap->active_fe == -1)
 353                return -EINVAL;
 354
 355        /* remove PID from device HW PID filter */
 356        if (adap->pid_filtering && adap->props->pid_filter) {
 357                ret = adap->props->pid_filter(adap, dvbdmxfeed->index,
 358                                dvbdmxfeed->pid, 0);
 359                if (ret)
 360                        dev_err(&d->udev->dev, "%s: pid_filter() failed=%d\n",
 361                                        KBUILD_MODNAME, ret);
 362        }
 363
 364        /* we cannot stop streaming until last PID is removed */
 365        if (--adap->feed_count > 0)
 366                goto skip_feed_stop;
 367
 368        /* ask device to stop streaming */
 369        if (d->props->streaming_ctrl) {
 370                ret = d->props->streaming_ctrl(adap->fe[adap->active_fe], 0);
 371                if (ret)
 372                        dev_err(&d->udev->dev,
 373                                        "%s: streaming_ctrl() failed=%d\n",
 374                                        KBUILD_MODNAME, ret);
 375        }
 376
 377        /* disable HW PID filter */
 378        if (adap->pid_filtering && adap->props->pid_filter_ctrl) {
 379                ret = adap->props->pid_filter_ctrl(adap, 0);
 380                if (ret)
 381                        dev_err(&d->udev->dev,
 382                                        "%s: pid_filter_ctrl() failed=%d\n",
 383                                        KBUILD_MODNAME, ret);
 384        }
 385
 386        /* kill USB streaming packets */
 387        usb_urb_killv2(&adap->stream);
 388
 389        /* clear 'streaming' status bit */
 390        clear_bit(ADAP_STREAMING, &adap->state_bits);
 391        smp_mb__after_atomic();
 392        wake_up_bit(&adap->state_bits, ADAP_STREAMING);
 393skip_feed_stop:
 394
 395        if (ret)
 396                dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
 397        return ret;
 398}
 399
 400static int dvb_usbv2_media_device_init(struct dvb_usb_adapter *adap)
 401{
 402#ifdef CONFIG_MEDIA_CONTROLLER_DVB
 403        struct media_device *mdev;
 404        struct dvb_usb_device *d = adap_to_d(adap);
 405        struct usb_device *udev = d->udev;
 406
 407        mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
 408        if (!mdev)
 409                return -ENOMEM;
 410
 411        media_device_usb_init(mdev, udev, d->name);
 412
 413        dvb_register_media_controller(&adap->dvb_adap, mdev);
 414
 415        dev_info(&d->udev->dev, "media controller created\n");
 416#endif
 417        return 0;
 418}
 419
 420static int dvb_usbv2_media_device_register(struct dvb_usb_adapter *adap)
 421{
 422#ifdef CONFIG_MEDIA_CONTROLLER_DVB
 423        return media_device_register(adap->dvb_adap.mdev);
 424#else
 425        return 0;
 426#endif
 427}
 428
 429static void dvb_usbv2_media_device_unregister(struct dvb_usb_adapter *adap)
 430{
 431#ifdef CONFIG_MEDIA_CONTROLLER_DVB
 432
 433        if (!adap->dvb_adap.mdev)
 434                return;
 435
 436        media_device_unregister(adap->dvb_adap.mdev);
 437        media_device_cleanup(adap->dvb_adap.mdev);
 438        kfree(adap->dvb_adap.mdev);
 439        adap->dvb_adap.mdev = NULL;
 440
 441#endif
 442}
 443
 444static int dvb_usbv2_adapter_dvb_init(struct dvb_usb_adapter *adap)
 445{
 446        int ret;
 447        struct dvb_usb_device *d = adap_to_d(adap);
 448
 449        dev_dbg(&d->udev->dev, "%s: adap=%d\n", __func__, adap->id);
 450
 451        ret = dvb_register_adapter(&adap->dvb_adap, d->name, d->props->owner,
 452                        &d->udev->dev, d->props->adapter_nr);
 453        if (ret < 0) {
 454                dev_dbg(&d->udev->dev, "%s: dvb_register_adapter() failed=%d\n",
 455                                __func__, ret);
 456                goto err_dvb_register_adapter;
 457        }
 458
 459        adap->dvb_adap.priv = adap;
 460
 461        ret = dvb_usbv2_media_device_init(adap);
 462        if (ret < 0) {
 463                dev_dbg(&d->udev->dev, "%s: dvb_usbv2_media_device_init() failed=%d\n",
 464                                __func__, ret);
 465                goto err_dvb_register_mc;
 466        }
 467
 468        if (d->props->read_mac_address) {
 469                ret = d->props->read_mac_address(adap,
 470                                adap->dvb_adap.proposed_mac);
 471                if (ret < 0)
 472                        goto err_dvb_dmx_init;
 473
 474                dev_info(&d->udev->dev, "%s: MAC address: %pM\n",
 475                                KBUILD_MODNAME, adap->dvb_adap.proposed_mac);
 476        }
 477
 478        adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
 479        adap->demux.priv             = adap;
 480        adap->demux.filternum        = 0;
 481        adap->demux.filternum        = adap->max_feed_count;
 482        adap->demux.feednum          = adap->demux.filternum;
 483        adap->demux.start_feed       = dvb_usb_start_feed;
 484        adap->demux.stop_feed        = dvb_usb_stop_feed;
 485        adap->demux.write_to_decoder = NULL;
 486        ret = dvb_dmx_init(&adap->demux);
 487        if (ret < 0) {
 488                dev_err(&d->udev->dev, "%s: dvb_dmx_init() failed=%d\n",
 489                                KBUILD_MODNAME, ret);
 490                goto err_dvb_dmx_init;
 491        }
 492
 493        adap->dmxdev.filternum       = adap->demux.filternum;
 494        adap->dmxdev.demux           = &adap->demux.dmx;
 495        adap->dmxdev.capabilities    = 0;
 496        ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap);
 497        if (ret < 0) {
 498                dev_err(&d->udev->dev, "%s: dvb_dmxdev_init() failed=%d\n",
 499                                KBUILD_MODNAME, ret);
 500                goto err_dvb_dmxdev_init;
 501        }
 502
 503        ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net, &adap->demux.dmx);
 504        if (ret < 0) {
 505                dev_err(&d->udev->dev, "%s: dvb_net_init() failed=%d\n",
 506                                KBUILD_MODNAME, ret);
 507                goto err_dvb_net_init;
 508        }
 509
 510        return 0;
 511err_dvb_net_init:
 512        dvb_dmxdev_release(&adap->dmxdev);
 513err_dvb_dmxdev_init:
 514        dvb_dmx_release(&adap->demux);
 515err_dvb_dmx_init:
 516        dvb_usbv2_media_device_unregister(adap);
 517err_dvb_register_mc:
 518        dvb_unregister_adapter(&adap->dvb_adap);
 519err_dvb_register_adapter:
 520        adap->dvb_adap.priv = NULL;
 521        return ret;
 522}
 523
 524static int dvb_usbv2_adapter_dvb_exit(struct dvb_usb_adapter *adap)
 525{
 526        dev_dbg(&adap_to_d(adap)->udev->dev, "%s: adap=%d\n", __func__,
 527                        adap->id);
 528
 529        if (adap->dvb_adap.priv) {
 530                dvb_net_release(&adap->dvb_net);
 531                adap->demux.dmx.close(&adap->demux.dmx);
 532                dvb_dmxdev_release(&adap->dmxdev);
 533                dvb_dmx_release(&adap->demux);
 534                dvb_unregister_adapter(&adap->dvb_adap);
 535        }
 536
 537        return 0;
 538}
 539
 540static int dvb_usbv2_device_power_ctrl(struct dvb_usb_device *d, int onoff)
 541{
 542        int ret;
 543
 544        if (onoff)
 545                d->powered++;
 546        else
 547                d->powered--;
 548
 549        if (d->powered == 0 || (onoff && d->powered == 1)) {
 550                /* when switching from 1 to 0 or from 0 to 1 */
 551                dev_dbg(&d->udev->dev, "%s: power=%d\n", __func__, onoff);
 552                if (d->props->power_ctrl) {
 553                        ret = d->props->power_ctrl(d, onoff);
 554                        if (ret < 0)
 555                                goto err;
 556                }
 557        }
 558
 559        return 0;
 560err:
 561        dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
 562        return ret;
 563}
 564
 565static int dvb_usb_fe_init(struct dvb_frontend *fe)
 566{
 567        int ret;
 568        struct dvb_usb_adapter *adap = fe->dvb->priv;
 569        struct dvb_usb_device *d = adap_to_d(adap);
 570        dev_dbg(&d->udev->dev, "%s: adap=%d fe=%d\n", __func__, adap->id,
 571                        fe->id);
 572
 573        if (!adap->suspend_resume_active) {
 574                adap->active_fe = fe->id;
 575                set_bit(ADAP_INIT, &adap->state_bits);
 576        }
 577
 578        ret = dvb_usbv2_device_power_ctrl(d, 1);
 579        if (ret < 0)
 580                goto err;
 581
 582        if (d->props->frontend_ctrl) {
 583                ret = d->props->frontend_ctrl(fe, 1);
 584                if (ret < 0)
 585                        goto err;
 586        }
 587
 588        if (adap->fe_init[fe->id]) {
 589                ret = adap->fe_init[fe->id](fe);
 590                if (ret < 0)
 591                        goto err;
 592        }
 593err:
 594        if (!adap->suspend_resume_active) {
 595                clear_bit(ADAP_INIT, &adap->state_bits);
 596                smp_mb__after_atomic();
 597                wake_up_bit(&adap->state_bits, ADAP_INIT);
 598        }
 599
 600        dev_dbg(&d->udev->dev, "%s: ret=%d\n", __func__, ret);
 601        return ret;
 602}
 603
 604static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
 605{
 606        int ret;
 607        struct dvb_usb_adapter *adap = fe->dvb->priv;
 608        struct dvb_usb_device *d = adap_to_d(adap);
 609        dev_dbg(&d->udev->dev, "%s: adap=%d fe=%d\n", __func__, adap->id,
 610                        fe->id);
 611
 612        if (!adap->suspend_resume_active) {
 613                set_bit(ADAP_SLEEP, &adap->state_bits);
 614                wait_on_bit(&adap->state_bits, ADAP_STREAMING,
 615                                TASK_UNINTERRUPTIBLE);
 616        }
 617
 618        if (adap->fe_sleep[fe->id]) {
 619                ret = adap->fe_sleep[fe->id](fe);
 620                if (ret < 0)
 621                        goto err;
 622        }
 623
 624        if (d->props->frontend_ctrl) {
 625                ret = d->props->frontend_ctrl(fe, 0);
 626                if (ret < 0)
 627                        goto err;
 628        }
 629
 630        ret = dvb_usbv2_device_power_ctrl(d, 0);
 631
 632err:
 633        if (!adap->suspend_resume_active) {
 634                adap->active_fe = -1;
 635                clear_bit(ADAP_SLEEP, &adap->state_bits);
 636                smp_mb__after_atomic();
 637                wake_up_bit(&adap->state_bits, ADAP_SLEEP);
 638        }
 639
 640        dev_dbg(&d->udev->dev, "%s: ret=%d\n", __func__, ret);
 641        return ret;
 642}
 643
 644static int dvb_usbv2_adapter_frontend_init(struct dvb_usb_adapter *adap)
 645{
 646        int ret, i, count_registered = 0;
 647        struct dvb_usb_device *d = adap_to_d(adap);
 648        dev_dbg(&d->udev->dev, "%s: adap=%d\n", __func__, adap->id);
 649
 650        memset(adap->fe, 0, sizeof(adap->fe));
 651        adap->active_fe = -1;
 652
 653        if (d->props->frontend_attach) {
 654                ret = d->props->frontend_attach(adap);
 655                if (ret < 0) {
 656                        dev_dbg(&d->udev->dev,
 657                                        "%s: frontend_attach() failed=%d\n",
 658                                        __func__, ret);
 659                        goto err_dvb_frontend_detach;
 660                }
 661        } else {
 662                dev_dbg(&d->udev->dev, "%s: frontend_attach() do not exists\n",
 663                                __func__);
 664                ret = 0;
 665                goto err;
 666        }
 667
 668        for (i = 0; i < MAX_NO_OF_FE_PER_ADAP && adap->fe[i]; i++) {
 669                adap->fe[i]->id = i;
 670                /* re-assign sleep and wakeup functions */
 671                adap->fe_init[i] = adap->fe[i]->ops.init;
 672                adap->fe[i]->ops.init = dvb_usb_fe_init;
 673                adap->fe_sleep[i] = adap->fe[i]->ops.sleep;
 674                adap->fe[i]->ops.sleep = dvb_usb_fe_sleep;
 675
 676                ret = dvb_register_frontend(&adap->dvb_adap, adap->fe[i]);
 677                if (ret < 0) {
 678                        dev_err(&d->udev->dev,
 679                                        "%s: frontend%d registration failed\n",
 680                                        KBUILD_MODNAME, i);
 681                        goto err_dvb_unregister_frontend;
 682                }
 683
 684                count_registered++;
 685        }
 686
 687        if (d->props->tuner_attach) {
 688                ret = d->props->tuner_attach(adap);
 689                if (ret < 0) {
 690                        dev_dbg(&d->udev->dev, "%s: tuner_attach() failed=%d\n",
 691                                        __func__, ret);
 692                        goto err_dvb_unregister_frontend;
 693                }
 694        }
 695
 696        ret = dvb_create_media_graph(&adap->dvb_adap, true);
 697        if (ret < 0)
 698                goto err_dvb_unregister_frontend;
 699
 700        ret = dvb_usbv2_media_device_register(adap);
 701
 702        return ret;
 703
 704err_dvb_unregister_frontend:
 705        for (i = count_registered - 1; i >= 0; i--)
 706                dvb_unregister_frontend(adap->fe[i]);
 707
 708err_dvb_frontend_detach:
 709        for (i = MAX_NO_OF_FE_PER_ADAP - 1; i >= 0; i--) {
 710                if (adap->fe[i]) {
 711                        dvb_frontend_detach(adap->fe[i]);
 712                        adap->fe[i] = NULL;
 713                }
 714        }
 715
 716err:
 717        dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
 718        return ret;
 719}
 720
 721static int dvb_usbv2_adapter_frontend_exit(struct dvb_usb_adapter *adap)
 722{
 723        int ret, i;
 724        struct dvb_usb_device *d = adap_to_d(adap);
 725
 726        dev_dbg(&d->udev->dev, "%s: adap=%d\n", __func__, adap->id);
 727
 728        for (i = MAX_NO_OF_FE_PER_ADAP - 1; i >= 0; i--) {
 729                if (adap->fe[i]) {
 730                        dvb_unregister_frontend(adap->fe[i]);
 731                        dvb_frontend_detach(adap->fe[i]);
 732                }
 733        }
 734
 735        if (d->props->tuner_detach) {
 736                ret = d->props->tuner_detach(adap);
 737                if (ret < 0) {
 738                        dev_dbg(&d->udev->dev, "%s: tuner_detach() failed=%d\n",
 739                                        __func__, ret);
 740                }
 741        }
 742
 743        if (d->props->frontend_detach) {
 744                ret = d->props->frontend_detach(adap);
 745                if (ret < 0) {
 746                        dev_dbg(&d->udev->dev,
 747                                        "%s: frontend_detach() failed=%d\n",
 748                                        __func__, ret);
 749                }
 750        }
 751
 752        return 0;
 753}
 754
 755static int dvb_usbv2_adapter_init(struct dvb_usb_device *d)
 756{
 757        struct dvb_usb_adapter *adap;
 758        int ret, i, adapter_count;
 759
 760        /* resolve adapter count */
 761        adapter_count = d->props->num_adapters;
 762        if (d->props->get_adapter_count) {
 763                ret = d->props->get_adapter_count(d);
 764                if (ret < 0)
 765                        goto err;
 766
 767                adapter_count = ret;
 768        }
 769
 770        for (i = 0; i < adapter_count; i++) {
 771                adap = &d->adapter[i];
 772                adap->id = i;
 773                adap->props = &d->props->adapter[i];
 774
 775                /* speed - when running at FULL speed we need a HW PID filter */
 776                if (d->udev->speed == USB_SPEED_FULL &&
 777                                !(adap->props->caps & DVB_USB_ADAP_HAS_PID_FILTER)) {
 778                        dev_err(&d->udev->dev,
 779                                        "%s: this USB2.0 device cannot be run on a USB1.1 port (it lacks a hardware PID filter)\n",
 780                                        KBUILD_MODNAME);
 781                        ret = -ENODEV;
 782                        goto err;
 783                } else if ((d->udev->speed == USB_SPEED_FULL &&
 784                                adap->props->caps & DVB_USB_ADAP_HAS_PID_FILTER) ||
 785                                (adap->props->caps & DVB_USB_ADAP_NEED_PID_FILTERING)) {
 786                        dev_info(&d->udev->dev,
 787                                        "%s: will use the device's hardware PID filter (table count: %d)\n",
 788                                        KBUILD_MODNAME,
 789                                        adap->props->pid_filter_count);
 790                        adap->pid_filtering  = 1;
 791                        adap->max_feed_count = adap->props->pid_filter_count;
 792                } else {
 793                        dev_info(&d->udev->dev,
 794                                        "%s: will pass the complete MPEG2 transport stream to the software demuxer\n",
 795                                        KBUILD_MODNAME);
 796                        adap->pid_filtering  = 0;
 797                        adap->max_feed_count = 255;
 798                }
 799
 800                if (!adap->pid_filtering && dvb_usb_force_pid_filter_usage &&
 801                                adap->props->caps & DVB_USB_ADAP_HAS_PID_FILTER) {
 802                        dev_info(&d->udev->dev,
 803                                        "%s: PID filter enabled by module option\n",
 804                                        KBUILD_MODNAME);
 805                        adap->pid_filtering  = 1;
 806                        adap->max_feed_count = adap->props->pid_filter_count;
 807                }
 808
 809                ret = dvb_usbv2_adapter_stream_init(adap);
 810                if (ret)
 811                        goto err;
 812
 813                ret = dvb_usbv2_adapter_dvb_init(adap);
 814                if (ret)
 815                        goto err;
 816
 817                ret = dvb_usbv2_adapter_frontend_init(adap);
 818                if (ret)
 819                        goto err;
 820
 821                /* use exclusive FE lock if there is multiple shared FEs */
 822                if (adap->fe[1])
 823                        adap->dvb_adap.mfe_shared = 1;
 824        }
 825
 826        return 0;
 827err:
 828        dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
 829        return ret;
 830}
 831
 832static int dvb_usbv2_adapter_exit(struct dvb_usb_device *d)
 833{
 834        int i;
 835        dev_dbg(&d->udev->dev, "%s:\n", __func__);
 836
 837        for (i = MAX_NO_OF_ADAPTER_PER_DEVICE - 1; i >= 0; i--) {
 838                if (d->adapter[i].props) {
 839                        dvb_usbv2_adapter_dvb_exit(&d->adapter[i]);
 840                        dvb_usbv2_adapter_stream_exit(&d->adapter[i]);
 841                        dvb_usbv2_adapter_frontend_exit(&d->adapter[i]);
 842                        dvb_usbv2_media_device_unregister(&d->adapter[i]);
 843                }
 844        }
 845
 846        return 0;
 847}
 848
 849/* general initialization functions */
 850static int dvb_usbv2_exit(struct dvb_usb_device *d)
 851{
 852        dev_dbg(&d->udev->dev, "%s:\n", __func__);
 853
 854        dvb_usbv2_remote_exit(d);
 855        dvb_usbv2_adapter_exit(d);
 856        dvb_usbv2_i2c_exit(d);
 857
 858        return 0;
 859}
 860
 861static int dvb_usbv2_init(struct dvb_usb_device *d)
 862{
 863        int ret;
 864        dev_dbg(&d->udev->dev, "%s:\n", __func__);
 865
 866        dvb_usbv2_device_power_ctrl(d, 1);
 867
 868        if (d->props->read_config) {
 869                ret = d->props->read_config(d);
 870                if (ret < 0)
 871                        goto err;
 872        }
 873
 874        ret = dvb_usbv2_i2c_init(d);
 875        if (ret < 0)
 876                goto err;
 877
 878        ret = dvb_usbv2_adapter_init(d);
 879        if (ret < 0)
 880                goto err;
 881
 882        if (d->props->init) {
 883                ret = d->props->init(d);
 884                if (ret < 0)
 885                        goto err;
 886        }
 887
 888        ret = dvb_usbv2_remote_init(d);
 889        if (ret < 0)
 890                goto err;
 891
 892        dvb_usbv2_device_power_ctrl(d, 0);
 893
 894        return 0;
 895err:
 896        dvb_usbv2_device_power_ctrl(d, 0);
 897        dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
 898        return ret;
 899}
 900
 901int dvb_usbv2_probe(struct usb_interface *intf,
 902                const struct usb_device_id *id)
 903{
 904        int ret;
 905        struct dvb_usb_device *d;
 906        struct usb_device *udev = interface_to_usbdev(intf);
 907        struct dvb_usb_driver_info *driver_info =
 908                        (struct dvb_usb_driver_info *) id->driver_info;
 909
 910        dev_dbg(&udev->dev, "%s: bInterfaceNumber=%d\n", __func__,
 911                        intf->cur_altsetting->desc.bInterfaceNumber);
 912
 913        if (!id->driver_info) {
 914                dev_err(&udev->dev, "%s: driver_info failed\n", KBUILD_MODNAME);
 915                ret = -ENODEV;
 916                goto err;
 917        }
 918
 919        d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL);
 920        if (!d) {
 921                dev_err(&udev->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
 922                ret = -ENOMEM;
 923                goto err;
 924        }
 925
 926        d->intf = intf;
 927        d->name = driver_info->name;
 928        d->rc_map = driver_info->rc_map;
 929        d->udev = udev;
 930        d->props = driver_info->props;
 931
 932        if (intf->cur_altsetting->desc.bInterfaceNumber !=
 933                        d->props->bInterfaceNumber) {
 934                ret = -ENODEV;
 935                goto err_kfree_d;
 936        }
 937
 938        mutex_init(&d->usb_mutex);
 939        mutex_init(&d->i2c_mutex);
 940
 941        if (d->props->size_of_priv) {
 942                d->priv = kzalloc(d->props->size_of_priv, GFP_KERNEL);
 943                if (!d->priv) {
 944                        dev_err(&d->udev->dev, "%s: kzalloc() failed\n",
 945                                        KBUILD_MODNAME);
 946                        ret = -ENOMEM;
 947                        goto err_kfree_d;
 948                }
 949        }
 950
 951        if (d->props->probe) {
 952                ret = d->props->probe(d);
 953                if (ret)
 954                        goto err_kfree_priv;
 955        }
 956
 957        if (d->props->identify_state) {
 958                const char *name = NULL;
 959                ret = d->props->identify_state(d, &name);
 960                if (ret == COLD) {
 961                        dev_info(&d->udev->dev,
 962                                        "%s: found a '%s' in cold state\n",
 963                                        KBUILD_MODNAME, d->name);
 964
 965                        if (!name)
 966                                name = d->props->firmware;
 967
 968                        ret = dvb_usbv2_download_firmware(d, name);
 969                        if (ret == 0) {
 970                                /* device is warm, continue initialization */
 971                                ;
 972                        } else if (ret == RECONNECTS_USB) {
 973                                /*
 974                                 * USB core will call disconnect() and then
 975                                 * probe() as device reconnects itself from the
 976                                 * USB bus. disconnect() will release all driver
 977                                 * resources and probe() is called for 'new'
 978                                 * device. As 'new' device is warm we should
 979                                 * never go here again.
 980                                 */
 981                                goto exit;
 982                        } else {
 983                                goto err_free_all;
 984                        }
 985                } else if (ret != WARM) {
 986                        goto err_free_all;
 987                }
 988        }
 989
 990        dev_info(&d->udev->dev, "%s: found a '%s' in warm state\n",
 991                        KBUILD_MODNAME, d->name);
 992
 993        ret = dvb_usbv2_init(d);
 994        if (ret < 0)
 995                goto err_free_all;
 996
 997        dev_info(&d->udev->dev,
 998                        "%s: '%s' successfully initialized and connected\n",
 999                        KBUILD_MODNAME, d->name);
1000exit:
1001        usb_set_intfdata(intf, d);
1002
1003        return 0;
1004err_free_all:
1005        dvb_usbv2_exit(d);
1006        if (d->props->disconnect)
1007                d->props->disconnect(d);
1008err_kfree_priv:
1009        kfree(d->priv);
1010err_kfree_d:
1011        kfree(d);
1012err:
1013        dev_dbg(&udev->dev, "%s: failed=%d\n", __func__, ret);
1014        return ret;
1015}
1016EXPORT_SYMBOL(dvb_usbv2_probe);
1017
1018void dvb_usbv2_disconnect(struct usb_interface *intf)
1019{
1020        struct dvb_usb_device *d = usb_get_intfdata(intf);
1021        const char *devname = kstrdup(dev_name(&d->udev->dev), GFP_KERNEL);
1022        const char *drvname = d->name;
1023
1024        dev_dbg(&d->udev->dev, "%s: bInterfaceNumber=%d\n", __func__,
1025                        intf->cur_altsetting->desc.bInterfaceNumber);
1026
1027        if (d->props->exit)
1028                d->props->exit(d);
1029
1030        dvb_usbv2_exit(d);
1031
1032        if (d->props->disconnect)
1033                d->props->disconnect(d);
1034
1035        kfree(d->priv);
1036        kfree(d);
1037
1038        pr_info("%s: '%s:%s' successfully deinitialized and disconnected\n",
1039                KBUILD_MODNAME, drvname, devname);
1040        kfree(devname);
1041}
1042EXPORT_SYMBOL(dvb_usbv2_disconnect);
1043
1044int dvb_usbv2_suspend(struct usb_interface *intf, pm_message_t msg)
1045{
1046        struct dvb_usb_device *d = usb_get_intfdata(intf);
1047        int ret = 0, i, active_fe;
1048        struct dvb_frontend *fe;
1049        dev_dbg(&d->udev->dev, "%s:\n", __func__);
1050
1051        /* stop remote controller poll */
1052        if (d->rc_polling_active)
1053                cancel_delayed_work_sync(&d->rc_query_work);
1054
1055        for (i = MAX_NO_OF_ADAPTER_PER_DEVICE - 1; i >= 0; i--) {
1056                active_fe = d->adapter[i].active_fe;
1057                if (d->adapter[i].dvb_adap.priv && active_fe != -1) {
1058                        fe = d->adapter[i].fe[active_fe];
1059                        d->adapter[i].suspend_resume_active = true;
1060
1061                        if (d->props->streaming_ctrl)
1062                                d->props->streaming_ctrl(fe, 0);
1063
1064                        /* stop usb streaming */
1065                        usb_urb_killv2(&d->adapter[i].stream);
1066
1067                        ret = dvb_frontend_suspend(fe);
1068                }
1069        }
1070
1071        return ret;
1072}
1073EXPORT_SYMBOL(dvb_usbv2_suspend);
1074
1075static int dvb_usbv2_resume_common(struct dvb_usb_device *d)
1076{
1077        int ret = 0, i, active_fe;
1078        struct dvb_frontend *fe;
1079        dev_dbg(&d->udev->dev, "%s:\n", __func__);
1080
1081        for (i = 0; i < MAX_NO_OF_ADAPTER_PER_DEVICE; i++) {
1082                active_fe = d->adapter[i].active_fe;
1083                if (d->adapter[i].dvb_adap.priv && active_fe != -1) {
1084                        fe = d->adapter[i].fe[active_fe];
1085
1086                        ret = dvb_frontend_resume(fe);
1087
1088                        /* resume usb streaming */
1089                        usb_urb_submitv2(&d->adapter[i].stream, NULL);
1090
1091                        if (d->props->streaming_ctrl)
1092                                d->props->streaming_ctrl(fe, 1);
1093
1094                        d->adapter[i].suspend_resume_active = false;
1095                }
1096        }
1097
1098        /* start remote controller poll */
1099        if (d->rc_polling_active)
1100                schedule_delayed_work(&d->rc_query_work,
1101                                msecs_to_jiffies(d->rc.interval));
1102
1103        return ret;
1104}
1105
1106int dvb_usbv2_resume(struct usb_interface *intf)
1107{
1108        struct dvb_usb_device *d = usb_get_intfdata(intf);
1109        dev_dbg(&d->udev->dev, "%s:\n", __func__);
1110
1111        return dvb_usbv2_resume_common(d);
1112}
1113EXPORT_SYMBOL(dvb_usbv2_resume);
1114
1115int dvb_usbv2_reset_resume(struct usb_interface *intf)
1116{
1117        struct dvb_usb_device *d = usb_get_intfdata(intf);
1118        int ret;
1119        dev_dbg(&d->udev->dev, "%s:\n", __func__);
1120
1121        dvb_usbv2_device_power_ctrl(d, 1);
1122
1123        if (d->props->init)
1124                d->props->init(d);
1125
1126        ret = dvb_usbv2_resume_common(d);
1127
1128        dvb_usbv2_device_power_ctrl(d, 0);
1129
1130        return ret;
1131}
1132EXPORT_SYMBOL(dvb_usbv2_reset_resume);
1133
1134MODULE_VERSION("2.0");
1135MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>");
1136MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1137MODULE_DESCRIPTION("DVB USB common");
1138MODULE_LICENSE("GPL");
1139