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/* 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_usb_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", KBUILD_MODNAME, ret);
schedule_delayed_work(&d->rc_query_work,
msecs_to_jiffies(d->rc.interval));
}
int dvb_usb_remote_init(struct dvb_usb_device *d)
{
int ret;
struct rc_dev *dev;
if (dvb_usb_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",
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_usb_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;
}
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