[deliverable/linux.git] / drivers / media / dvb / dvb-usb / dvb-usb-remote.c

/* 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, 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    0x02
int 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 < sizeof(keymap)/sizeof(struct dvb_usb_rc_key); i++)
				if (keymap[i].custom == keybuf[1] &&
					keymap[i].data == keybuf[3]) {
					*event = keymap[i].event;
					*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);
Commit	Line	Data
776338e1 JS	1	/* dvb-usb-remote.c is part of the DVB USB library.
	2	*
	3	* Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
	4	* see dvb-usb-init.c for copyright information.
	5	*
	6	* This file contains functions for initializing the the input-device and for handling remote-control-queries.
	7	*/
	8	#include "dvb-usb-common.h"
	9
	10	/* Remote-control poll function - called every dib->rc_query_interval ms to see
	11	* whether the remote control has received anything.
	12	*
	13	* TODO: Fix the repeat rate of the input device.
	14	*/
	15	static void dvb_usb_read_remote_control(void *data)
	16	{
	17	struct dvb_usb_device *d = data;
	18	u32 event;
	19	int state;
	20
	21	/* TODO: need a lock here. We can simply skip checking for the remote control
	22	if we're busy. */
	23
c9b06fa4 PB	24	/* when the parameter has been set to 1 via sysfs while the driver was running */
	25	if (dvb_usb_disable_rc_polling)
	26	return;
	27
776338e1 JS	28	if (d->props.rc_query(d,&event,&state)) {
	29	err("error while querying for an remote control event.");
	30	goto schedule;
	31	}
	32
	33
	34	switch (state) {
	35	case REMOTE_NO_KEY_PRESSED:
	36	break;
	37	case REMOTE_KEY_PRESSED:
	38	deb_rc("key pressed\n");
	39	d->last_event = event;
	40	case REMOTE_KEY_REPEAT:
	41	deb_rc("key repeated\n");
	42	input_event(&d->rc_input_dev, EV_KEY, event, 1);
	43	input_event(&d->rc_input_dev, EV_KEY, d->last_event, 0);
	44	input_sync(&d->rc_input_dev);
	45	break;
	46	default:
	47	break;
	48	}
	49
	50	/* improved repeat handling ???
	51	switch (state) {
	52	case REMOTE_NO_KEY_PRESSED:
	53	deb_rc("NO KEY PRESSED\n");
	54	if (d->last_state != REMOTE_NO_KEY_PRESSED) {
	55	deb_rc("releasing event %d\n",d->last_event);
	56	input_event(&d->rc_input_dev, EV_KEY, d->last_event, 0);
	57	input_sync(&d->rc_input_dev);
	58	}
	59	d->last_state = REMOTE_NO_KEY_PRESSED;
	60	d->last_event = 0;
	61	break;
	62	case REMOTE_KEY_PRESSED:
	63	deb_rc("KEY PRESSED\n");
	64	deb_rc("pressing event %d\n",event);
	65
	66	input_event(&d->rc_input_dev, EV_KEY, event, 1);
	67	input_sync(&d->rc_input_dev);
	68
	69	d->last_event = event;
	70	d->last_state = REMOTE_KEY_PRESSED;
	71	break;
	72	case REMOTE_KEY_REPEAT:
	73	deb_rc("KEY_REPEAT\n");
	74	if (d->last_state != REMOTE_NO_KEY_PRESSED) {
	75	deb_rc("repeating event %d\n",d->last_event);
	76	input_event(&d->rc_input_dev, EV_KEY, d->last_event, 2);
	77	input_sync(&d->rc_input_dev);
	78	d->last_state = REMOTE_KEY_REPEAT;
	79	}
	80	default:
	81	break;
	82	}
	83	*/
	84
	85	schedule:
	86	schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc_interval));
	87	}
	88
	89	int dvb_usb_remote_init(struct dvb_usb_device *d)
	90	{
	91	int i;
c9b06fa4 PB	92	if (d->props.rc_key_map == NULL \|\|
	93	d->props.rc_query == NULL \|\|
	94	dvb_usb_disable_rc_polling)
776338e1 JS	95	return 0;
	96
	97	/* Initialise the remote-control structures.*/
	98	init_input_dev(&d->rc_input_dev);
	99
	100	d->rc_input_dev.evbit[0] = BIT(EV_KEY);
	101	d->rc_input_dev.keycodesize = sizeof(unsigned char);
	102	d->rc_input_dev.keycodemax = KEY_MAX;
	103	d->rc_input_dev.name = "IR-receiver inside an USB DVB receiver";
	104
	105	/* set the bits for the keys */
	106	deb_rc("key map size: %d\n",d->props.rc_key_map_size);
	107	for (i = 0; i < d->props.rc_key_map_size; i++) {
	108	deb_rc("setting bit for event %d item %d\n",d->props.rc_key_map[i].event, i);
	109	set_bit(d->props.rc_key_map[i].event, d->rc_input_dev.keybit);
	110	}
	111
	112	/* Start the remote-control polling. */
	113	if (d->props.rc_interval < 40)
	114	d->props.rc_interval = 100; /* default */
	115
	116	/* setting these two values to non-zero, we have to manage key repeats */
	117	d->rc_input_dev.rep[REP_PERIOD] = d->props.rc_interval;
	118	d->rc_input_dev.rep[REP_DELAY] = d->props.rc_interval + 150;
	119
	120	input_register_device(&d->rc_input_dev);
	121
	122	INIT_WORK(&d->rc_query_work, dvb_usb_read_remote_control, d);
	123
	124	info("schedule remote query interval to %d msecs.",d->props.rc_interval);
	125	schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc_interval));
	126
	127	d->state \|= DVB_USB_STATE_REMOTE;
	128
	129	return 0;
	130	}
	131
	132	int dvb_usb_remote_exit(struct dvb_usb_device *d)
	133	{
	134	if (d->state & DVB_USB_STATE_REMOTE) {
	135	cancel_delayed_work(&d->rc_query_work);
	136	flush_scheduled_work();
	137	input_unregister_device(&d->rc_input_dev);
	138	}
	139	d->state &= ~DVB_USB_STATE_REMOTE;
	140	return 0;
	141	}
	142
	143	#define DVB_USB_RC_NEC_EMPTY 0x00
	144	#define DVB_USB_RC_NEC_KEY_PRESSED 0x01
	145	#define DVB_USB_RC_NEC_KEY_REPEATED 0x02
	146	int dvb_usb_nec_rc_key_to_event(struct dvb_usb_device *d,
	147	u8 keybuf[5], u32 event, int state)
	148	{
	149	int i;
	150	struct dvb_usb_rc_key *keymap = d->props.rc_key_map;
	151	*event = 0;
	152	*state = REMOTE_NO_KEY_PRESSED;
	153	switch (keybuf[0]) {
	154	case DVB_USB_RC_NEC_EMPTY:
	155	break;
	156	case DVB_USB_RC_NEC_KEY_PRESSED:
	157	if ((u8) ~keybuf[1] != keybuf[2] \|\|
	158	(u8) ~keybuf[3] != keybuf[4]) {
159	deb_err("remote control checksum failed.\n");
160	break;
161	}
162	/* See if we can match the raw key code. */
163	for (i = 0; i < sizeof(keymap)/sizeof(struct dvb_usb_rc_key); i++)
164	if (keymap[i].custom == keybuf[1] &&
165	keymap[i].data == keybuf[3]) {
166	*event = keymap[i].event;
167	*state = REMOTE_KEY_PRESSED;
168	break;
169	}
170	deb_err("key mapping failed - no appropriate key found in keymapping\n");
171	break;
172	case DVB_USB_RC_NEC_KEY_REPEATED:
173	*state = REMOTE_KEY_REPEAT;
174	break;
175	default:
176	deb_err("unkown type of remote status: %d\n",keybuf[0]);
177	break;
178	}
179	return 0;
180	}
181	EXPORT_SYMBOL(dvb_usb_nec_rc_key_to_event);