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 || adap->active_fe < 0) {
		ret = -ENODEV;
		goto err;
	}

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

	/* stop feed before setting a new pid if there will be no pid anymore */
	if (newfeedcount == 0) {
		pr_debug("%s: stop feeding\n", __func__);
		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 */
	pr_debug("%s: setting pid (%s): %5d %04x at index %d '%s'\n", __func__,
			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;
		}

		pr_debug("%s: submitting all URBs\n", __func__);

		usb_urb_submit(&adap->stream, &stream_props);

		pr_debug("%s: controlling pid parser\n", __func__);
		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;
			}
		}
		pr_debug("%s: start feeding\n", __func__);
		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;
err:
	pr_debug("%s: failed=%d\n", __func__, ret);
	return ret;
}

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

static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
{
	pr_debug("%s: stop pid %04x feedtype %d", __func__, 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) {
		pr_debug("%s: dvb_register_adapter failed=%d\n", __func__, 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) {
		pr_debug("%s: unregistering DVB part\n", __func__);
		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_fe_wakeup(struct dvb_frontend *fe)
{
	int ret;
	struct dvb_usb_adapter *adap = fe->dvb->priv;

	ret = dvb_usb_device_power_ctrl(adap->dev, 1);
	if (ret < 0)
		goto err;

	if (adap->props.frontend_ctrl) {
		ret = adap->props.frontend_ctrl(fe, 1);
		if (ret < 0)
			goto err;
	}

	if (adap->fe_init[fe->id]) {
		ret = adap->fe_init[fe->id](fe);
		if (ret < 0)
			goto err;
	}

	adap->active_fe = fe->id;

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

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

	if (adap->fe_sleep[fe->id]) {
		ret = adap->fe_sleep[fe->id](fe);
		if (ret < 0)
			goto err;
	}

	if (adap->props.frontend_ctrl) {
		ret = adap->props.frontend_ctrl(fe, 0);
		if (ret < 0)
			goto err;
	}

	ret = dvb_usb_device_power_ctrl(adap->dev, 0);
	if (ret < 0)
		goto err;

	adap->active_fe = -1;

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

int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap)
{
	int ret, i, count_registered = 0;

	pr_debug("%s:\n", __func__);

	memset(adap->fe, 0, sizeof(adap->fe));
	adap->active_fe = -1;

	if (adap->props.frontend_attach) {
		ret = adap->props.frontend_attach(adap);
		if (ret < 0) {
			pr_debug("%s: frontend_attach() failed=%d\n", __func__,
					ret);
			goto err_dvb_frontend_detach;
		}
	} else {
		pr_debug("%s: frontend_attach() do not exists\n", __func__);
		ret = 0;
		goto err;
	}

	if (adap->props.tuner_attach) {
		ret = adap->props.tuner_attach(adap);
		if (ret < 0) {
			pr_debug("%s: tuner_attach() failed=%d\n", __func__,
					ret);
			goto err_dvb_frontend_detach;
		}
	}

	for (i = 0; i < MAX_NO_OF_FE_PER_ADAP && adap->fe[i]; i++) {
		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) {
			pr_err("%s: frontend%d registration failed\n",
					KBUILD_MODNAME, i);
			goto err_dvb_unregister_frontend;
		}

		count_registered++;
	}

	adap->num_frontends_initialized = count_registered;

	return 0;

err_dvb_unregister_frontend:
	for (i = count_registered - 1; i >= 0; i--)
		dvb_unregister_frontend(adap->fe[i]);

err_dvb_frontend_detach:
	for (i = MAX_NO_OF_FE_PER_ADAP - 1; i >= 0; i--) {
		if (adap->fe[i])
			dvb_frontend_detach(adap->fe[i]);
	}

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

int dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter *adap)
{
	int i;

	pr_debug("%s:\n", __func__);

	for (i = adap->num_frontends_initialized - 1; i >= 0; i--) {
		if (adap->fe[i]) {
			dvb_unregister_frontend(adap->fe[i]);
			dvb_frontend_detach(adap->fe[i]);
		}
	}

	adap->num_frontends_initialized = 0;

	return 0;
}