/* 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. */	/* when the parameter has been set to 1 via sysfs while the driver was running */	if (dvb_usb_disable_rc_polling)		return;	if (d->props.rc_query(d,&event,&state)) {		err("error while querying for an remote control event.");		goto schedule;	}	switch (state) {		case REMOTE_NO_KEY_PRESSED:			break;		case REMOTE_KEY_PRESSED:			deb_rc("key pressed\n");			d->last_event = event;		case REMOTE_KEY_REPEAT:			deb_rc("key repeated\n");			input_event(&d->rc_input_dev, EV_KEY, d->last_event, 1);			input_event(&d->rc_input_dev, EV_KEY, d->last_event, 0);			input_sync(&d->rc_input_dev);			break;		default:			break;	}/* improved repeat handling ???	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){	int i;	if (d->props.rc_key_map == NULL ||		d->props.rc_query == NULL ||		dvb_usb_disable_rc_polling)		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 = "IR-receiver inside an USB DVB receiver";	/* set the bits for the keys */	deb_rc("key map size: %d\n",d->props.rc_key_map_size);	for (i = 0; i < d->props.rc_key_map_size; i++) {		deb_rc("setting bit for event %d item %d\n",d->props.rc_key_map[i].event, i);		set_bit(d->props.rc_key_map[i].event, d->rc_input_dev.keybit);	}	/* 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->state |= DVB_USB_STATE_REMOTE;	return 0;}int dvb_usb_remote_exit(struct dvb_usb_device *d){	if (d->state & DVB_USB_STATE_REMOTE) {		cancel_delayed_work(&d->rc_query_work);		flush_scheduled_work();		input_unregister_device(&d->rc_input_dev);	}	d->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    0x02int dvb_usb_nec_rc_key_to_event(struct dvb_usb_device *d,		u8 keybuf[5], u32 *event, int *state){	int i;	struct dvb_usb_rc_key *keymap = d->props.rc_key_map;	*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 ((u8) ~keybuf[1] != keybuf[2] ||				(u8) ~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 < d->props.rc_key_map_size; i++)				if (keymap[i].custom == keybuf[1] &&					keymap[i].data == keybuf[3]) {					*event = keymap[i].event;					*state = REMOTE_KEY_PRESSED;					return 0;				}			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);