[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, 211 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-init.c b/drivers/media/dvb/dvb-usb/dvb-usb-init.c
new file mode 100644
index 00000000000..3aadec974cf
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/dvb-usb-init.c
@@ -0,0 +1,211 @@
+/*
+ * DVB USB library - provides a generic interface for a DVB USB device driver.
+ *
+ * dvb-usb-init.c
+ *
+ * Copyright (C) 2004-5 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
+ *	Software Foundation, version 2.
+ *
+ * see Documentation/dvb/README.dvb-usb for more information
+ */
+#include "dvb-usb-common.h"
+
+/* 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);
+
+/* general initialization functions */
+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_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);
+	kfree(d);
+	return 0;
+}
+
+static int dvb_usb_init(struct dvb_usb_device *d)
+{
+	int ret = 0;
+
+	sema_init(&d->usb_sem, 1);
+	sema_init(&d->i2c_sem, 1);
+
+	d->state = DVB_USB_STATE_INIT;
+
+/* check the capabilites 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 HW PID filter)");
+		return -ENODEV;
+	}
+
+	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 hw PID filter.");
+		d->pid_filtering = 1;
+		d->max_feed_count = d->props.pid_filter_count;
+	} else {
+		info("will pass the complete MPEG2 transport stream to the demuxer.");
+		d->pid_filtering = 0;
+		d->max_feed_count = 255;
+	}
+
+	if (d->props.power_ctrl)
+		d->props.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))) {
+		dvb_usb_exit(d);
+		return ret;
+	}
+
+	if ((ret = dvb_usb_remote_init(d)))
+		err("could not initialize remote control.");
+
+	if (d->props.power_ctrl)
+		d->props.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)
+{
+	int i,j;
+	struct dvb_usb_device_description *desc = NULL;
+	*cold = -1;
+
+	for (i = 0; i < props->num_device_descs; i++) {
+
+		for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) {
+			deb_info("check for cold %x %x\n",props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct);
+			if (props->devices[i].cold_ids[j]->idVendor  == le16_to_cpu(udev->descriptor.idVendor) &&
+				props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
+				*cold = 1;
+				desc = &props->devices[i];
+				break;
+			}
+		}
+
+		if (desc != NULL)
+			break;
+
+		for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) {
+			deb_info("check for warm %x %x\n",props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct);
+			if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
+				props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
+				*cold = 0;
+				desc = &props->devices[i];
+				break;
+			}
+		}
+	}
+
+	if (desc != NULL && props->identify_state != NULL)
+		props->identify_state(udev,props,&desc,cold);
+
+	return desc;
+}
+
+/*
+ * USB
+ */
+int dvb_usb_device_init(struct usb_interface *intf, struct dvb_usb_properties *props, struct module *owner)
+{
+	struct usb_device *udev = interface_to_usbdev(intf);
+	struct dvb_usb_device *d = NULL;
+	struct dvb_usb_device_description *desc = NULL;
+
+	int ret = -ENOMEM,cold=0;
+
+	if ((desc = dvb_usb_find_device(udev,props,&cold)) == NULL) {
+		deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n");
+		return -ENODEV;
+	}
+
+	if (cold) {
+		info("found a '%s' in cold state, will try to load a firmware",desc->name);
+		ret = usb_cypress_load_firmware(udev,props->firmware,props->usb_ctrl);
+	} else {
+		info("found a '%s' in warm state.",desc->name);
+		d = kmalloc(sizeof(struct dvb_usb_device),GFP_KERNEL);
+		if (d == NULL) {
+			err("no memory for 'struct dvb_usb_device'");
+			return ret;
+		}
+		memset(d,0,sizeof(struct dvb_usb_device));
+
+		d->udev = udev;
+		memcpy(&d->props,props,sizeof(struct dvb_usb_properties));
+		d->desc = desc;
+		d->owner = owner;
+
+		if (d->props.size_of_priv > 0) {
+			d->priv = kmalloc(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;
+			}
+			memset(d->priv,0,d->props.size_of_priv);
+		}
+
+		usb_set_intfdata(intf, d);
+
+		ret = dvb_usb_init(d);
+	}
+
+	if (ret == 0)
+		info("%s successfully initialized and connected.",desc->name);
+	else
+		info("%s error while loading driver (%d)",desc->name,ret);
+	return ret;
+}
+EXPORT_SYMBOL(dvb_usb_device_init);
+
+void dvb_usb_device_exit(struct usb_interface *intf)
+{
+	struct dvb_usb_device *d = usb_get_intfdata(intf);
+	const char *name = "generic DVB-USB module";
+
+	usb_set_intfdata(intf,NULL);
+	if (d != NULL && d->desc != NULL) {
+		name = d->desc->name;
+		dvb_usb_exit(d);
+	}
+	info("%s successfully deinitialized and disconnected.",name);
+
+}
+EXPORT_SYMBOL(dvb_usb_device_exit);
+
+/* module stuff */
+static int __init dvb_usb_module_init(void)
+{
+	return 0;
+}
+
+static void __exit dvb_usb_module_exit(void)
+{
+}
+
+module_init (dvb_usb_module_init);
+module_exit (dvb_usb_module_exit);
+
+MODULE_VERSION("0.3");
+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");