1 files changed, 350 insertions, 0 deletions

diff --git a/drivers/media/usb/dvb-usb/dvb-usb-dvb.c b/drivers/media/usb/dvb-usb/dvb-usb-dvb.c
new file mode 100644
index 000000000..0a7f8ba90
--- /dev/null
+++ b/drivers/media/usb/dvb-usb/dvb-usb-dvb.c
@@ -0,0 +1,350 @@
+// SPDX-License-Identifier: GPL-2.0
+/* dvb-usb-dvb.c is part of the DVB USB library.
+ *
+ * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.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"
+#include <media/media-device.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("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;
+			}
+		}
+
+		deb_ts("submitting all URBs\n");
+		usb_urb_submit(&adap->fe_adap[adap->active_fe].stream);
+	}
+	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);
+}
+
+static int dvb_usb_media_device_init(struct dvb_usb_adapter *adap)
+{
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+	struct media_device *mdev;
+	struct dvb_usb_device *d = adap->dev;
+	struct usb_device *udev = d->udev;
+
+	mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
+	if (!mdev)
+		return -ENOMEM;
+
+	media_device_usb_init(mdev, udev, d->desc->name);
+
+	dvb_register_media_controller(&adap->dvb_adap, mdev);
+
+	dev_info(&d->udev->dev, "media controller created\n");
+#endif
+	return 0;
+}
+
+static int  dvb_usb_media_device_register(struct dvb_usb_adapter *adap)
+{
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+	return media_device_register(adap->dvb_adap.mdev);
+#else
+	return 0;
+#endif
+}
+
+static void dvb_usb_media_device_unregister(struct dvb_usb_adapter *adap)
+{
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+	if (!adap->dvb_adap.mdev)
+		return;
+
+	mutex_lock(&adap->dvb_adap.mdev_lock);
+
+	media_device_unregister(adap->dvb_adap.mdev);
+	media_device_cleanup(adap->dvb_adap.mdev);
+	kfree(adap->dvb_adap.mdev);
+	adap->dvb_adap.mdev = NULL;
+
+	mutex_unlock(&adap->dvb_adap.mdev_lock);
+#endif
+}
+
+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;
+
+	ret = dvb_usb_media_device_init(adap);
+	if (ret < 0) {
+		deb_info("dvb_usb_media_device_init failed: error %d", ret);
+		goto err_mc;
+	}
+
+	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_usb_media_device_unregister(adap);
+err_mc:
+	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_usb_media_device_unregister(adap);
+		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++;
+	}
+
+	ret = dvb_create_media_graph(&adap->dvb_adap, true);
+	if (ret)
+		return ret;
+
+	ret = dvb_usb_media_device_register(adap);
+
+	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_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;
+}