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/* dvb-usb-remote.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 the the input-device and for handling remote-control-queries.
*/
#include "dvb-usb-common.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(void *data)
{
struct dvb_usb_device *d = data;
u32 event;
int state;
/* TODO: need a lock here. We can simply skip checking for the remote control
if we're busy. */
if (d->props.query_rc(d,&event,&state)) {
err("error while querying for an remote control event.");
goto schedule;
}
switch (state) {
case REMOTE_NO_KEY_PRESSED:
deb_rc("NO KEY PRESSED\n");
if (d->last_state != REMOTE_NO_KEY_PRESSED) {
deb_rc("releasing event %d\n",d->last_event);
input_event(&d->rc_input_dev, EV_KEY, d->last_event, 0);
input_sync(&d->rc_input_dev);
}
d->last_state = REMOTE_NO_KEY_PRESSED;
d->last_event = 0;
break;
case REMOTE_KEY_PRESSED:
deb_rc("KEY PRESSED\n");
deb_rc("pressing event %d\n",event);
input_event(&d->rc_input_dev, EV_KEY, event, 1);
input_sync(&d->rc_input_dev);
d->last_event = event;
d->last_state = REMOTE_KEY_PRESSED;
break;
case REMOTE_KEY_REPEAT:
deb_rc("KEY_REPEAT\n");
if (d->last_state != REMOTE_NO_KEY_PRESSED) {
deb_rc("repeating event %d\n",d->last_event);
input_event(&d->rc_input_dev, EV_KEY, d->last_event, 2);
input_sync(&d->rc_input_dev);
d->last_state = REMOTE_KEY_REPEAT;
}
default:
break;
}
schedule:
schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc_interval));
}
int dvb_usb_remote_init(struct dvb_usb_device *d)
{
if (d->props.query_rc == NULL)
return 0;
/* Initialise the remote-control structures.*/
init_input_dev(&d->rc_input_dev);
d->rc_input_dev.evbit[0] = BIT(EV_KEY);
d->rc_input_dev.keycodesize = sizeof(unsigned char);
d->rc_input_dev.keycodemax = KEY_MAX;
d->rc_input_dev.name = "Remote control inside an USB DVB receiver";
/* set the bits for the keys */
d->props.init_rc(d);
/* Start the remote-control polling. */
if (d->props.rc_interval < 40)
d->props.rc_interval = 100; /* default */
/* setting these two values to non-zero, we have to manage key repeats */
d->rc_input_dev.rep[REP_PERIOD] = d->props.rc_interval;
d->rc_input_dev.rep[REP_DELAY] = d->props.rc_interval + 150;
input_register_device(&d->rc_input_dev);
INIT_WORK(&d->rc_query_work, dvb_usb_read_remote_control, d);
info("schedule remote query interval to %d msecs.",d->props.rc_interval);
schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc_interval));
d->init_state |= DVB_USB_STATE_REMOTE;
return 0;
}
int dvb_usb_remote_exit(struct dvb_usb_device *d)
{
if (d->init_state & DVB_USB_STATE_REMOTE) {
cancel_delayed_work(&d->rc_query_work);
flush_scheduled_work();
input_unregister_device(&d->rc_input_dev);
}
d->init_state &= ~DVB_USB_STATE_REMOTE;
return 0;
}
#define DVB_USB_RC_NEC_EMPTY 0x00
#define DVB_USB_RC_NEC_KEY_PRESSED 0x01
#define DVB_USB_RC_NEC_KEY_REPEATED 0x02
int dvb_usb_nec_rc_key_to_event(struct dvb_usb_device *d, struct dvb_usb_nec_rc_key keymap[],int key_count, u8 keybuf[5], u32 *event, int *state)
{
int i;
*event = 0;
*state = REMOTE_NO_KEY_PRESSED;
switch (keybuf[0]) {
case DVB_USB_RC_NEC_EMPTY:
break;
case DVB_USB_RC_NEC_KEY_PRESSED:
if ((0xff - keybuf[3]) != keybuf[4]) {
deb_err("remote control checksum failed.\n");
break;
}
/* See if we can match the raw key code. */
for (i = 0; i < key_count; i++)
if (keymap[i].c0 == keybuf[1] &&
keymap[i].c1 == keybuf[2] &&
keymap[i].c2 == keybuf[3]) {
*event = keymap[i].key;
*state = REMOTE_KEY_PRESSED;
break;
}
deb_err("key mapping failed - no appropriate key found in keymapping\n");
break;
case DVB_USB_RC_NEC_KEY_REPEATED:
*state = REMOTE_KEY_REPEAT;
break;
default:
deb_err("unkown type of remote status: %d\n",keybuf[0]);
break;
}
return 0;
}
EXPORT_SYMBOL(dvb_usb_nec_rc_key_to_event);
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