[PATCH] dvb: Add generalized dvb-usb driver

Add generalized dvb-usb driver which supports a wide variety of devices.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 210 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-dvb.c b/drivers/media/dvb/dvb-usb/dvb-usb-dvb.c
new file mode 100644
index 000000000000..bdd72f779707
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/dvb-usb-dvb.c
@@ -0,0 +1,210 @@
+/* dvb-usb-dvb.c is part of the DVB USB library.
+ *
+ * Copyright (C) 2004-5 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 int dvb_usb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
+{
+	struct dvb_usb_device *d = dvbdmxfeed->demux->priv;
+	int newfeedcount,ret;
+
+	if (d == NULL)
+		return -ENODEV;
+
+	newfeedcount = d->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");
+
+		if (d->props.streaming_ctrl != NULL)
+			if ((ret = d->props.streaming_ctrl(d,0)))
+				err("error while stopping stream.");
+
+		dvb_usb_urb_kill(d);
+	}
+
+	d->feedcount = newfeedcount;
+
+	/* activate the pid on the device specific pid_filter */
+	deb_ts("setting pid: %5d %04x at index %d '%s'\n",dvbdmxfeed->pid,dvbdmxfeed->pid,dvbdmxfeed->index,onoff ? "on" : "off");
+	if (d->props.caps & DVB_USB_HAS_PID_FILTER &&
+		d->pid_filtering &&
+		d->props.pid_filter != NULL)
+		d->props.pid_filter(d,dvbdmxfeed->index,dvbdmxfeed->pid,onoff);
+
+	/* start the feed if this was the first feed and there is still a feed
+	 * for reception.
+	 */
+	if (d->feedcount == onoff && d->feedcount > 0) {
+
+		deb_ts("controlling pid parser\n");
+		if (d->props.caps & DVB_USB_HAS_PID_FILTER &&
+			d->props.caps & DVB_USB_PID_FILTER_CAN_BE_TURNED_OFF &&
+			d->props.pid_filter_ctrl != NULL)
+			if (d->props.pid_filter_ctrl(d,d->pid_filtering) < 0)
+				err("could not handle pid_parser");
+
+		deb_ts("start feeding\n");
+		if (d->props.streaming_ctrl != NULL)
+			if (d->props.streaming_ctrl(d,1)) {
+				err("error while enabling fifo.");
+				return -ENODEV;
+			}
+
+		dvb_usb_urb_submit(d);
+	}
+	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_dvb_init(struct dvb_usb_device *d)
+{
+	int ret;
+
+	if ((ret = dvb_register_adapter(&d->dvb_adap, d->desc->name,
+			d->owner)) < 0) {
+		deb_info("dvb_register_adapter failed: error %d", ret);
+		goto err;
+	}
+	d->dvb_adap.priv = d;
+
+	if (d->props.read_mac_address) {
+		if (d->props.read_mac_address(d,d->dvb_adap.proposed_mac) == 0)
+			info("MAC address: %02x:%02x:%02x:%02x:%02x:%02x",d->dvb_adap.proposed_mac[0],
+					d->dvb_adap.proposed_mac[1],d->dvb_adap.proposed_mac[2],
+					d->dvb_adap.proposed_mac[3],d->dvb_adap.proposed_mac[4],
+					d->dvb_adap.proposed_mac[5]);
+		else
+			err("MAC address reading failed.");
+	}
+
+
+	d->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
+	d->demux.priv = d;
+
+	d->demux.feednum = d->demux.filternum = d->max_feed_count;
+	d->demux.start_feed = dvb_usb_start_feed;
+	d->demux.stop_feed  = dvb_usb_stop_feed;
+	d->demux.write_to_decoder = NULL;
+	if ((ret = dvb_dmx_init(&d->demux)) < 0) {
+		err("dvb_dmx_init failed: error %d",ret);
+		goto err_dmx;
+	}
+
+	d->dmxdev.filternum = d->demux.filternum;
+	d->dmxdev.demux = &d->demux.dmx;
+	d->dmxdev.capabilities = 0;
+	if ((ret = dvb_dmxdev_init(&d->dmxdev, &d->dvb_adap)) < 0) {
+		err("dvb_dmxdev_init failed: error %d",ret);
+		goto err_dmx_dev;
+	}
+
+	dvb_net_init(&d->dvb_adap, &d->dvb_net, &d->demux.dmx);
+
+	goto success;
+err_dmx_dev:
+	dvb_dmx_release(&d->demux);
+err_dmx:
+	dvb_unregister_adapter(&d->dvb_adap);
+err:
+	return ret;
+success:
+	d->state |= DVB_USB_STATE_DVB;
+	return 0;
+}
+
+int dvb_usb_dvb_exit(struct dvb_usb_device *d)
+{
+	if (d->state & DVB_USB_STATE_DVB) {
+		deb_info("unregistering DVB part\n");
+		dvb_net_release(&d->dvb_net);
+		d->demux.dmx.close(&d->demux.dmx);
+		dvb_dmxdev_release(&d->dmxdev);
+		dvb_dmx_release(&d->demux);
+		dvb_unregister_adapter(&d->dvb_adap);
+		d->state &= ~DVB_USB_STATE_DVB;
+	}
+	return 0;
+}
+
+static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
+{
+	struct dvb_usb_device *d = fe->dvb->priv;
+
+	if (d->props.power_ctrl)
+		d->props.power_ctrl(d,1);
+
+	if (d->fe_init)
+		d->fe_init(fe);
+
+	return 0;
+}
+
+static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
+{
+	struct dvb_usb_device *d = fe->dvb->priv;
+
+	if (d->fe_sleep)
+		d->fe_sleep(fe);
+
+	if (d->props.power_ctrl)
+		d->props.power_ctrl(d,0);
+
+	return 0;
+}
+
+int dvb_usb_fe_init(struct dvb_usb_device* d)
+{
+	if (d->props.frontend_attach == NULL) {
+		err("strange '%s' don't want to attach a frontend.",d->desc->name);
+		return 0;
+	}
+
+	d->props.frontend_attach(d);
+
+	/* re-assign sleep and wakeup functions */
+	if (d->fe != NULL) {
+		d->fe_init = d->fe->ops->init;   d->fe->ops->init  = dvb_usb_fe_wakeup;
+		d->fe_sleep = d->fe->ops->sleep; d->fe->ops->sleep = dvb_usb_fe_sleep;
+
+		if (dvb_register_frontend(&d->dvb_adap, d->fe)) {
+			err("Frontend registration failed.");
+			if (d->fe->ops->release)
+				d->fe->ops->release(d->fe);
+			d->fe = NULL;
+			return -ENODEV;
+		}
+	} else
+		err("no frontend was attached by '%s'",d->desc->name);
+
+	if (d->props.tuner_attach != NULL)
+		d->props.tuner_attach(d);
+
+	return 0;
+}
+
+int dvb_usb_fe_exit(struct dvb_usb_device *d)
+{
+	if (d->fe != NULL)
+		dvb_unregister_frontend(d->fe);
+	return 0;
+}