dvb_usb_dvb.c

/* dvb-usb-dvb.c is part of the DVB USB library.
 *
 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
 * 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"

static void dvb_usb_data_complete(struct usb_data_stream *stream, u8 *buffer,
		size_t length)
{
	struct dvb_usb_adapter *adap = stream->user_priv;
	if (adap->feedcount > 0 && adap->state & DVB_USB_ADAP_STATE_DVB)
		dvb_dmx_swfilter(&adap->demux, buffer, length);
}

static void dvb_usb_data_complete_204(struct usb_data_stream *stream,
		u8 *buffer, size_t length)
{
	struct dvb_usb_adapter *adap = stream->user_priv;
	if (adap->feedcount > 0 && adap->state & DVB_USB_ADAP_STATE_DVB)
		dvb_dmx_swfilter_204(&adap->demux, buffer, length);
}

static void dvb_usb_data_complete_raw(struct usb_data_stream *stream,
				      u8 *buffer, size_t length)
{
	struct dvb_usb_adapter *adap = stream->user_priv;
	if (adap->feedcount > 0 && adap->state & DVB_USB_ADAP_STATE_DVB)
		dvb_dmx_swfilter_raw(&adap->demux, buffer, length);
}

int dvb_usb_adapter_stream_init(struct dvb_usb_adapter *adap)
{
	int ret;
	struct usb_data_stream_properties stream_props;

	adap->stream.udev = adap->dev->udev;
	adap->stream.user_priv = adap;

	/* resolve USB stream configuration for buffer alloc */
	if (adap->dev->props.get_usb_stream_config) {
		ret = adap->dev->props.get_usb_stream_config(NULL,
				&stream_props);
		if (ret < 0)
			return ret;
	} else {
		stream_props = adap->props.stream;
	}

	/* FIXME: can be removed as set later in anyway */
	adap->stream.complete = dvb_usb_data_complete;

	return usb_urb_init(&adap->stream, &stream_props);
}

int dvb_usb_adapter_stream_exit(struct dvb_usb_adapter *adap)
{
	usb_urb_exit(&adap->stream);
	return 0;
}

/* 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->stream);

		if (adap->props.streaming_ctrl != NULL) {
			ret = adap->props.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->pid_filtering ?
		"yes" : "no", dvbdmxfeed->pid, dvbdmxfeed->pid,
		dvbdmxfeed->index, onoff ? "on" : "off");
	if (adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER &&
			adap->pid_filtering &&
			adap->props.pid_filter != NULL)
		adap->props.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) {
		struct usb_data_stream_properties stream_props;
		unsigned int ts_props;

		/* resolve TS configuration */
		if (adap->dev->props.get_ts_config) {
			ret = adap->dev->props.get_ts_config(
					adap->fe[adap->active_fe],
					&ts_props);
			if (ret < 0)
				return ret;
		} else {
			ts_props = 0; /* normal 188 payload only TS */
		}

		if (ts_props & DVB_USB_ADAP_RECEIVES_204_BYTE_TS)
			adap->stream.complete = dvb_usb_data_complete_204;
		else if (ts_props & DVB_USB_ADAP_RECEIVES_RAW_PAYLOAD)
			adap->stream.complete = dvb_usb_data_complete_raw;
		else
			adap->stream.complete = dvb_usb_data_complete;

		/* resolve USB stream configuration */
		if (adap->dev->props.get_usb_stream_config) {
			ret = adap->dev->props.get_usb_stream_config(
					adap->fe[adap->active_fe],
					&stream_props);
			if (ret < 0)
				return ret;
		} else {
			stream_props = adap->props.stream;
		}

		deb_ts("submitting all URBs\n");
		usb_urb_submit(&adap->stream, &stream_props);

		deb_ts("controlling pid parser\n");
		if (adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER &&
			adap->props.caps &
			DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF &&
			adap->props.pid_filter_ctrl != NULL) {
			ret = adap->props.pid_filter_ctrl(
				adap,
				adap->pid_filtering);
			if (ret < 0) {
				err("could not handle pid_parser");
				return ret;
			}
		}
		deb_ts("start feeding\n");
		if (adap->props.streaming_ctrl != NULL) {
			ret = adap->props.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)
{
	int ret = dvb_register_adapter(&adap->dvb_adap, adap->dev->name,
				       adap->dev->props.owner,
				       &adap->dev->udev->dev,
				       adap->dev->props.adapter_nr);
	if (ret < 0) {
		deb_info("dvb_register_adapter failed: error %d", ret);
		goto err;
	}
	adap->dvb_adap.priv = adap;
	adap->dvb_adap.fe_ioctl_override = adap->props.fe_ioctl_override;

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

	ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net, &adap->demux.dmx);
	if (ret < 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_init[fe->id])
		adap->fe_init[fe->id](fe);

	return 0;
}

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

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

	memset(adap->fe, 0, sizeof(adap->fe));

	adap->active_fe = 0;

	if (adap->props.frontend_attach == NULL) {
		err("strange: '%s' doesn't want to attach a frontend.",
				adap->dev->name);
		ret = 0;
		goto err;
	}

	/* attach all given adapter frontends */
	ret = adap->props.frontend_attach(adap);
	if (ret < 0)
		goto err;

	if (adap->fe[0] == NULL) {
		err("no frontend was attached by '%s'", adap->dev->name);
		goto err;
	}

	for (i = 0; i < MAX_NO_OF_FE_PER_ADAP; i++) {
		if (adap->fe[i] == NULL)
			break;

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

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

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

		adap->num_frontends_initialized++;
	}

	/* attach all given adapter tuners */
	if (adap->props.tuner_attach) {
		ret = adap->props.tuner_attach(adap);
		if (ret < 0)
			err("tuner attach failed - will continue");
	}

	return 0;
err:
	pr_debug("%s: failed=%d\n", __func__, ret);
	return ret;
}

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[i] != NULL) {
			dvb_unregister_frontend(adap->fe[i]);
			dvb_frontend_detach(adap->fe[i]);
		}
	}
	adap->num_frontends_initialized = 0;

	return 0;
}