dvb-usb-dvb.c

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/* dvb-usb-dvb.c is part of the DVB USB library.
 *
 * Copyright (C) 2004-6 Patrick Boettcher ([email protected])
 * see dvb-usb-init.c for copyright information.
 *
 * This file contains functions for initializing and handling the
 * linux-dvb API.
 */
#include "dvb-usb-common.h"

/* does the complete input transfer handling */
static int dvb_usb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
{
    struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
    int newfeedcount, ret;

    if (adap == NULL)
        return -ENODEV;

    if ((adap->active_fe < 0) ||
        (adap->active_fe >= adap->num_frontends_initialized)) {
        return -EINVAL;
    }

    newfeedcount = adap->feedcount + (onoff ? 1 : -1);

    /* stop feed before setting a new pid if there will be no pid anymore */
    if (newfeedcount == 0) {
        deb_ts("stop feeding\n");
        usb_urb_kill(&adap->fe_adap[adap->active_fe].stream);

        if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
            ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 0);
            if (ret < 0) {
                err("error while stopping stream.");
                return ret;
            }
        }
    }

    adap->feedcount = newfeedcount;

    /* activate the pid on the device specific pid_filter */
    deb_ts("setting pid (%s): %5d %04x at index %d '%s'\n",
        adap->fe_adap[adap->active_fe].pid_filtering ?
        "yes" : "no", dvbdmxfeed->pid, dvbdmxfeed->pid,
        dvbdmxfeed->index, onoff ? "on" : "off");
    if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
        adap->fe_adap[adap->active_fe].pid_filtering &&
        adap->props.fe[adap->active_fe].pid_filter != NULL)
        adap->props.fe[adap->active_fe].pid_filter(adap, dvbdmxfeed->index, dvbdmxfeed->pid, onoff);

    /* start the feed if this was the first feed and there is still a feed
     * for reception.
     */
    if (adap->feedcount == onoff && adap->feedcount > 0) {
        deb_ts("submitting all URBs\n");
        usb_urb_submit(&adap->fe_adap[adap->active_fe].stream);

        deb_ts("controlling pid parser\n");
        if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
            adap->props.fe[adap->active_fe].caps &
            DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF &&
            adap->props.fe[adap->active_fe].pid_filter_ctrl != NULL) {
            ret = adap->props.fe[adap->active_fe].pid_filter_ctrl(adap,
                adap->fe_adap[adap->active_fe].pid_filtering);
            if (ret < 0) {
                err("could not handle pid_parser");
                return ret;
            }
        }
        deb_ts("start feeding\n");
        if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
            ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 1);
            if (ret < 0) {
                err("error while enabling fifo.");
                return ret;
            }
        }

    }
    return 0;
}

static int dvb_usb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
{
    deb_ts("start pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid,dvbdmxfeed->type);
    return dvb_usb_ctrl_feed(dvbdmxfeed,1);
}

static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
{
    deb_ts("stop pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid, dvbdmxfeed->type);
    return dvb_usb_ctrl_feed(dvbdmxfeed,0);
}

int dvb_usb_adapter_dvb_init(struct dvb_usb_adapter *adap, short *adapter_nums)
{
    int i;
    int ret = dvb_register_adapter(&adap->dvb_adap, adap->dev->desc->name,
                       adap->dev->owner, &adap->dev->udev->dev,
                       adapter_nums);

    if (ret < 0) {
        deb_info("dvb_register_adapter failed: error %d", ret);
        goto err;
    }
    adap->dvb_adap.priv = adap;

    if (adap->dev->props.read_mac_address) {
        if (adap->dev->props.read_mac_address(adap->dev,adap->dvb_adap.proposed_mac) == 0)
            info("MAC address: %pM",adap->dvb_adap.proposed_mac);
        else
            err("MAC address reading failed.");
    }


    adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
    adap->demux.priv             = adap;

    adap->demux.filternum        = 0;
    for (i = 0; i < adap->props.num_frontends; i++) {
        if (adap->demux.filternum < adap->fe_adap[i].max_feed_count)
            adap->demux.filternum = adap->fe_adap[i].max_feed_count;
    }
    adap->demux.feednum          = adap->demux.filternum;
    adap->demux.start_feed       = dvb_usb_start_feed;
    adap->demux.stop_feed        = dvb_usb_stop_feed;
    adap->demux.write_to_decoder = NULL;
    if ((ret = dvb_dmx_init(&adap->demux)) < 0) {
        err("dvb_dmx_init failed: error %d",ret);
        goto err_dmx;
    }

    adap->dmxdev.filternum       = adap->demux.filternum;
    adap->dmxdev.demux           = &adap->demux.dmx;
    adap->dmxdev.capabilities    = 0;
    if ((ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap)) < 0) {
        err("dvb_dmxdev_init failed: error %d",ret);
        goto err_dmx_dev;
    }

    if ((ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net,
                        &adap->demux.dmx)) < 0) {
        err("dvb_net_init failed: error %d",ret);
        goto err_net_init;
    }

    adap->state |= DVB_USB_ADAP_STATE_DVB;
    return 0;

err_net_init:
    dvb_dmxdev_release(&adap->dmxdev);
err_dmx_dev:
    dvb_dmx_release(&adap->demux);
err_dmx:
    dvb_unregister_adapter(&adap->dvb_adap);
err:
    return ret;
}

int dvb_usb_adapter_dvb_exit(struct dvb_usb_adapter *adap)
{
    if (adap->state & DVB_USB_ADAP_STATE_DVB) {
        deb_info("unregistering DVB part\n");
        dvb_net_release(&adap->dvb_net);
        adap->demux.dmx.close(&adap->demux.dmx);
        dvb_dmxdev_release(&adap->dmxdev);
        dvb_dmx_release(&adap->demux);
        dvb_unregister_adapter(&adap->dvb_adap);
        adap->state &= ~DVB_USB_ADAP_STATE_DVB;
    }
    return 0;
}

static int dvb_usb_set_active_fe(struct dvb_frontend *fe, int onoff)
{
    struct dvb_usb_adapter *adap = fe->dvb->priv;

    int ret = (adap->props.frontend_ctrl) ?
        adap->props.frontend_ctrl(fe, onoff) : 0;

    if (ret < 0) {
        err("frontend_ctrl request failed");
        return ret;
    }
    if (onoff)
        adap->active_fe = fe->id;

    return 0;
}

static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
{
    struct dvb_usb_adapter *adap = fe->dvb->priv;

    dvb_usb_device_power_ctrl(adap->dev, 1);

    dvb_usb_set_active_fe(fe, 1);

    if (adap->fe_adap[fe->id].fe_init)
        adap->fe_adap[fe->id].fe_init(fe);

    return 0;
}

static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
{
    struct dvb_usb_adapter *adap = fe->dvb->priv;

    if (adap->fe_adap[fe->id].fe_sleep)
        adap->fe_adap[fe->id].fe_sleep(fe);

    dvb_usb_set_active_fe(fe, 0);

    return dvb_usb_device_power_ctrl(adap->dev, 0);
}

int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap)
{
    int ret, i;

    /* register all given adapter frontends */
    for (i = 0; i < adap->props.num_frontends; i++) {

        if (adap->props.fe[i].frontend_attach == NULL) {
            err("strange: '%s' #%d,%d "
                "doesn't want to attach a frontend.",
                adap->dev->desc->name, adap->id, i);

            return 0;
        }

        ret = adap->props.fe[i].frontend_attach(adap);
        if (ret || adap->fe_adap[i].fe == NULL) {
            /* only print error when there is no FE at all */
            if (i == 0)
                err("no frontend was attached by '%s'",
                    adap->dev->desc->name);

            return 0;
        }

        adap->fe_adap[i].fe->id = i;

        /* re-assign sleep and wakeup functions */
        adap->fe_adap[i].fe_init = adap->fe_adap[i].fe->ops.init;
        adap->fe_adap[i].fe->ops.init  = dvb_usb_fe_wakeup;
        adap->fe_adap[i].fe_sleep = adap->fe_adap[i].fe->ops.sleep;
        adap->fe_adap[i].fe->ops.sleep = dvb_usb_fe_sleep;

        if (dvb_register_frontend(&adap->dvb_adap, adap->fe_adap[i].fe)) {
            err("Frontend %d registration failed.", i);
            dvb_frontend_detach(adap->fe_adap[i].fe);
            adap->fe_adap[i].fe = NULL;
            /* In error case, do not try register more FEs,
             * still leaving already registered FEs alive. */
            if (i == 0)
                return -ENODEV;
            else
                return 0;
        }

        /* only attach the tuner if the demod is there */
        if (adap->props.fe[i].tuner_attach != NULL)
            adap->props.fe[i].tuner_attach(adap);

        adap->num_frontends_initialized++;
    }

    return 0;
}

int dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter *adap)
{
    int i = adap->num_frontends_initialized - 1;

    /* unregister all given adapter frontends */
    for (; i >= 0; i--) {
        if (adap->fe_adap[i].fe != NULL) {
            dvb_unregister_frontend(adap->fe_adap[i].fe);
            dvb_frontend_detach(adap->fe_adap[i].fe);
        }
    }
    adap->num_frontends_initialized = 0;

    return 0;
}