1 files changed, 117 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb/dvb_usb_remote.c b/drivers/media/usb/dvb-usb/dvb_usb_remote.c
new file mode 100644
index 000000000000..f856ab6648c7
--- /dev/null
+++ b/drivers/media/usb/dvb-usb/dvb_usb_remote.c
@@ -0,0 +1,117 @@
+/* dvb-usb-remote.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 the input-device and for
+ * handling remote-control-queries.
+ */
+#include "dvb_usb_common.h"
+#include <linux/usb/input.h>
+
+/* Remote-control poll function - called every dib->rc_query_interval ms to see
+ * whether the remote control has received anything.
+ *
+ * TODO: Fix the repeat rate of the input device.
+ */
+static void dvb_usb_read_remote_control(struct work_struct *work)
+{
+	struct dvb_usb_device *d = container_of(work,
+			struct dvb_usb_device, rc_query_work.work);
+	int ret;
+
+	/* TODO: need a lock here.  We can simply skip checking for the remote
+	   control if we're busy. */
+
+	/* when the parameter has been set to 1 via sysfs while the
+	 * driver was running, or when bulk mode is enabled after IR init
+	 */
+	if (dvb_usbv2_disable_rc_polling || d->rc.bulk_mode)
+		return;
+
+	ret = d->rc.query(d);
+	if (ret < 0)
+		pr_err("%s: error %d while querying for an remote control " \
+				"event\n", KBUILD_MODNAME, ret);
+
+	schedule_delayed_work(&d->rc_query_work,
+			      msecs_to_jiffies(d->rc.interval));
+}
+
+int dvb_usbv2_remote_init(struct dvb_usb_device *d)
+{
+	int ret;
+	struct rc_dev *dev;
+
+	if (dvb_usbv2_disable_rc_polling || !d->props->get_rc_config)
+		return 0;
+
+	ret = d->props->get_rc_config(d, &d->rc);
+	if (ret < 0)
+		goto err;
+
+	dev = rc_allocate_device();
+	if (!dev) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	dev->dev.parent = &d->udev->dev;
+	dev->input_name = "IR-receiver inside an USB DVB receiver";
+	usb_make_path(d->udev, d->rc_phys, sizeof(d->rc_phys));
+	strlcat(d->rc_phys, "/ir0", sizeof(d->rc_phys));
+	dev->input_phys = d->rc_phys;
+	usb_to_input_id(d->udev, &dev->input_id);
+	/* TODO: likely RC-core should took const char * */
+	dev->driver_name = (char *) d->props->driver_name;
+	dev->driver_type = d->rc.driver_type;
+	dev->allowed_protos = d->rc.allowed_protos;
+	dev->change_protocol = d->rc.change_protocol;
+	dev->priv = d;
+	/* select used keymap */
+	if (d->rc.map_name)
+		dev->map_name = d->rc.map_name;
+	else if (d->rc_map)
+		dev->map_name = d->rc_map;
+	else
+		dev->map_name = RC_MAP_EMPTY; /* keep rc enabled */
+
+	ret = rc_register_device(dev);
+	if (ret < 0) {
+		rc_free_device(dev);
+		goto err;
+	}
+
+	d->input_dev = NULL;
+	d->rc_dev = dev;
+
+	/* start polling if needed */
+	if (d->rc.query && !d->rc.bulk_mode) {
+		/* initialize a work queue for handling polling */
+		INIT_DELAYED_WORK(&d->rc_query_work,
+				dvb_usb_read_remote_control);
+		pr_info("%s: schedule remote query interval to %d msecs\n",
+				KBUILD_MODNAME, d->rc.interval);
+		schedule_delayed_work(&d->rc_query_work,
+				msecs_to_jiffies(d->rc.interval));
+	}
+
+	d->state |= DVB_USB_STATE_REMOTE;
+
+	return 0;
+err:
+	pr_debug("%s: failed=%d\n", __func__, ret);
+	return ret;
+}
+
+int dvb_usbv2_remote_exit(struct dvb_usb_device *d)
+{
+	if (d->state & DVB_USB_STATE_REMOTE) {
+		cancel_delayed_work_sync(&d->rc_query_work);
+		rc_unregister_device(d->rc_dev);
+	}
+
+	d->state &= ~DVB_USB_STATE_REMOTE;
+
+	return 0;
+}