V4L/DVB (4643): Multi-input patch for DVB-USB device

This patch is the first commit of the Multiple Input Patch for the DVB-USB frame
work.
It changes the DVB-USB-device to be able to have more than one streaming input
(e.g. multiple DVB-T sources) on one device. This is a necessary feature for
the upcoming DiB7700 driven devices.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 113 insertions, 43 deletions

diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-init.c b/drivers/media/dvb/dvb-usb/dvb-usb-init.c
index a1705ecb9a54..6babdcd4c1ab 100644
--- a/drivers/media/dvb/dvb-usb/dvb-usb-init.c
+++ b/drivers/media/dvb/dvb-usb/dvb-usb-init.c
@@ -3,7 +3,7 @@
  *
  * dvb-usb-init.c
  *
- * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
+ * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
  *
  *	This program is free software; you can redistribute it and/or modify it
  *	under the terms of the GNU General Public License as published by the Free
@@ -16,21 +16,105 @@
 /* debug */
 int dvb_usb_debug;
 module_param_named(debug,dvb_usb_debug, int, 0644);
-MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,pll=4,ts=8,err=16,rc=32,fw=64 (or-able))." DVB_USB_DEBUG_STATUS);
+MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,pll=4,ts=8,err=16,rc=32,fw=64,mem=128,uxfer=256  (or-able))." DVB_USB_DEBUG_STATUS);
 
 int dvb_usb_disable_rc_polling;
 module_param_named(disable_rc_polling, dvb_usb_disable_rc_polling, int, 0644);
 MODULE_PARM_DESC(disable_rc_polling, "disable remote control polling (default: 0).");
 
+static int dvb_usb_force_pid_filter_usage;
+module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage, int, 0444);
+MODULE_PARM_DESC(disable_rc_polling, "force all dvb-usb-devices to use a PID filter, if any (default: 0).");
+
+static int dvb_usb_adapter_init(struct dvb_usb_device *d)
+{
+	struct dvb_usb_adapter *adap;
+	int ret,n;
+
+	for (n = 0; n < d->props.num_adapters; n++) {
+		adap = &d->adapter[n];
+		adap->dev = d;
+		adap->id  = n;
+
+		memcpy(&adap->props, &d->props.adapter[n], sizeof(struct dvb_usb_adapter_properties));
+
+/* speed - when running at FULL speed we need a HW PID filter */
+		if (d->udev->speed == USB_SPEED_FULL && !(adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER)) {
+			err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)");
+			return -ENODEV;
+		}
+
+		if ((d->udev->speed == USB_SPEED_FULL && adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER) ||
+			(adap->props.caps & DVB_USB_ADAP_NEED_PID_FILTERING)) {
+			info("will use the device's hardware PID filter (table count: %d).",adap->props.pid_filter_count);
+			adap->pid_filtering  = 1;
+			adap->max_feed_count = adap->props.pid_filter_count;
+		} else {
+			info("will pass the complete MPEG2 transport stream to the software demuxer.");
+			adap->pid_filtering  = 0;
+			adap->max_feed_count = 255;
+		}
+
+		if (!adap->pid_filtering &&
+			dvb_usb_force_pid_filter_usage &&
+			adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER) {
+			info("pid filter enabled by module option.");
+			adap->pid_filtering  = 1;
+			adap->max_feed_count = adap->props.pid_filter_count;
+		}
+
+		if (adap->props.size_of_priv > 0) {
+			adap->priv = kzalloc(adap->props.size_of_priv,GFP_KERNEL);
+			if (adap->priv == NULL) {
+				err("no memory for priv for adapter %d.",n);
+				return -ENOMEM;
+			}
+		}
+
+		if ((ret = dvb_usb_adapter_stream_init(adap)) ||
+			(ret = dvb_usb_adapter_dvb_init(adap)) ||
+			(ret = dvb_usb_adapter_frontend_init(adap))) {
+			return ret;
+		}
+
+		d->num_adapters_initialized++;
+		d->state |= DVB_USB_STATE_DVB;
+	}
+
+	/*
+	 * when reloading the driver w/o replugging the device
+	 * sometimes a timeout occures, this helps
+	 */
+	if (d->props.generic_bulk_ctrl_endpoint != 0) {
+		usb_clear_halt(d->udev,usb_sndbulkpipe(d->udev,d->props.generic_bulk_ctrl_endpoint));
+		usb_clear_halt(d->udev,usb_rcvbulkpipe(d->udev,d->props.generic_bulk_ctrl_endpoint));
+	}
+
+	return 0;
+}
+
+static int dvb_usb_adapter_exit(struct dvb_usb_device *d)
+{
+	int n;
+	for (n = 0; n < d->num_adapters_initialized; n++) {
+		dvb_usb_adapter_frontend_exit(&d->adapter[n]);
+		dvb_usb_adapter_dvb_exit(&d->adapter[n]);
+		dvb_usb_adapter_stream_exit(&d->adapter[n]);
+		kfree(d->adapter[n].priv);
+	}
+	d->num_adapters_initialized = 0;
+	d->state &= ~DVB_USB_STATE_DVB;
+	return 0;
+}
+
+
 /* general initialization functions */
 static int dvb_usb_exit(struct dvb_usb_device *d)
 {
 	deb_info("state before exiting everything: %x\n",d->state);
 	dvb_usb_remote_exit(d);
-	dvb_usb_fe_exit(d);
+	dvb_usb_adapter_exit(d);
 	dvb_usb_i2c_exit(d);
-	dvb_usb_dvb_exit(d);
-	dvb_usb_urb_exit(d);
 	deb_info("state should be zero now: %x\n",d->state);
 	d->state = DVB_USB_STATE_INIT;
 	kfree(d->priv);
@@ -47,32 +131,19 @@ static int dvb_usb_init(struct dvb_usb_device *d)
 
 	d->state = DVB_USB_STATE_INIT;
 
-/* check the capabilities and set appropriate variables */
-
-/* speed - when running at FULL speed we need a HW PID filter */
-	if (d->udev->speed == USB_SPEED_FULL && !(d->props.caps & DVB_USB_HAS_PID_FILTER)) {
-		err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)");
-		return -ENODEV;
+	if (d->props.size_of_priv > 0) {
+		d->priv = kzalloc(d->props.size_of_priv,GFP_KERNEL);
+		if (d->priv == NULL) {
+			err("no memory for priv in 'struct dvb_usb_device'");
+			return -ENOMEM;
 	}
-
-	if ((d->udev->speed == USB_SPEED_FULL && d->props.caps & DVB_USB_HAS_PID_FILTER) ||
-		(d->props.caps & DVB_USB_NEED_PID_FILTERING)) {
-		info("will use the device's hardware PID filter (table count: %d).",d->props.pid_filter_count);
-		d->pid_filtering = 1;
-		d->max_feed_count = d->props.pid_filter_count;
-	} else {
-		info("will pass the complete MPEG2 transport stream to the software demuxer.");
-		d->pid_filtering = 0;
-		d->max_feed_count = 255;
 	}
 
-	if (d->props.power_ctrl)
-		d->props.power_ctrl(d,1);
+/* check the capabilities and set appropriate variables */
+	dvb_usb_device_power_ctrl(d, 1);
 
-	if ((ret = dvb_usb_urb_init(d)) ||
-		(ret = dvb_usb_dvb_init(d)) ||
-		(ret = dvb_usb_i2c_init(d)) ||
-		(ret = dvb_usb_fe_init(d))) {
+	if ((ret = dvb_usb_i2c_init(d)) ||
+		(ret = dvb_usb_adapter_init(d))) {
 		dvb_usb_exit(d);
 		return ret;
 	}
@@ -80,14 +151,13 @@ static int dvb_usb_init(struct dvb_usb_device *d)
 	if ((ret = dvb_usb_remote_init(d)))
 		err("could not initialize remote control.");
 
-	if (d->props.power_ctrl)
-		d->props.power_ctrl(d,0);
+	dvb_usb_device_power_ctrl(d, 0);
 
 	return 0;
 }
 
 /* determine the name and the state of the just found USB device */
-static struct dvb_usb_device_description * dvb_usb_find_device(struct usb_device *udev,struct dvb_usb_properties *props, int *cold)
+static struct dvb_usb_device_description * dvb_usb_find_device(struct usb_device *udev,struct dvb_usb_device_properties *props, int *cold)
 {
 	int i,j;
 	struct dvb_usb_device_description *desc = NULL;
@@ -125,11 +195,20 @@ static struct dvb_usb_device_description * dvb_usb_find_device(struct usb_device
 	return desc;
 }
 
+int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff)
+{
+	if (d->powered == !onoff) {
+		d->powered = onoff;
+		if (d->props.power_ctrl)
+			return d->props.power_ctrl(d, onoff);
+	}
+	return 0;
+}
+
 /*
  * USB
  */
-
-int dvb_usb_device_init(struct usb_interface *intf, struct dvb_usb_properties
+int dvb_usb_device_init(struct usb_interface *intf, struct dvb_usb_device_properties
 		*props, struct module *owner,struct dvb_usb_device **du)
 {
 	struct usb_device *udev = interface_to_usbdev(intf);
@@ -161,19 +240,10 @@ int dvb_usb_device_init(struct usb_interface *intf, struct dvb_usb_properties
 	}
 
 	d->udev = udev;
-	memcpy(&d->props,props,sizeof(struct dvb_usb_properties));
+	memcpy(&d->props,props,sizeof(struct dvb_usb_device_properties));
 	d->desc = desc;
 	d->owner = owner;
 
-	if (d->props.size_of_priv > 0) {
-			d->priv = kzalloc(d->props.size_of_priv,GFP_KERNEL);
-		if (d->priv == NULL) {
-			err("no memory for priv in 'struct dvb_usb_device'");
-			kfree(d);
-			return -ENOMEM;
-		}
-	}
-
 	usb_set_intfdata(intf, d);
 
 	if (du != NULL)
@@ -204,7 +274,7 @@ void dvb_usb_device_exit(struct usb_interface *intf)
 }
 EXPORT_SYMBOL(dvb_usb_device_exit);
 
-MODULE_VERSION("0.3");
+MODULE_VERSION("1.0");
 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
 MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices");
 MODULE_LICENSE("GPL");