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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>
static int dvb_usb_getkeycode(struct input_dev *dev,
unsigned int scancode, unsigned int *keycode)
{
struct dvb_usb_device *d = input_get_drvdata(dev);
struct ir_scancode *keymap = d->props.rc.legacy.rc_key_map;
int i;
/* See if we can match the raw key code. */
for (i = 0; i < d->props.rc.legacy.rc_key_map_size; i++)
if (keymap[i].scancode == scancode) {
*keycode = keymap[i].keycode;
return 0;
}
/*
* If is there extra space, returns KEY_RESERVED,
* otherwise, input core won't let dvb_usb_setkeycode
* to work
*/
for (i = 0; i < d->props.rc.legacy.rc_key_map_size; i++)
if (keymap[i].keycode == KEY_RESERVED ||
keymap[i].keycode == KEY_UNKNOWN) {
*keycode = KEY_RESERVED;
return 0;
}
return -EINVAL;
}
static int dvb_usb_setkeycode(struct input_dev *dev,
unsigned int scancode, unsigned int keycode)
{
struct dvb_usb_device *d = input_get_drvdata(dev);
struct ir_scancode *keymap = d->props.rc.legacy.rc_key_map;
int i;
/* Search if it is replacing an existing keycode */
for (i = 0; i < d->props.rc.legacy.rc_key_map_size; i++)
if (keymap[i].scancode == scancode) {
keymap[i].keycode = keycode;
return 0;
}
/* Search if is there a clean entry. If so, use it */
for (i = 0; i < d->props.rc.legacy.rc_key_map_size; i++)
if (keymap[i].keycode == KEY_RESERVED ||
keymap[i].keycode == KEY_UNKNOWN) {
keymap[i].scancode = scancode;
keymap[i].keycode = keycode;
return 0;
}
/*
* FIXME: Currently, it is not possible to increase the size of
* scancode table. For it to happen, one possibility
* would be to allocate a table with key_map_size + 1,
* copying data, appending the new key on it, and freeing
* the old one - or maybe just allocating some spare space
*/
return -EINVAL;
}
/* 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);
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.legacy.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_sync(d->rc_input_dev);
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.legacy.rc_interval));
}
int dvb_usb_remote_init(struct dvb_usb_device *d)
{
struct input_dev *input_dev;
int i;
int err;
if (d->props.rc.legacy.rc_key_map == NULL ||
d->props.rc.legacy.rc_query == NULL ||
dvb_usb_disable_rc_polling)
return 0;
usb_make_path(d->udev, d->rc_phys, sizeof(d->rc_phys));
strlcat(d->rc_phys, "/ir0", sizeof(d->rc_phys));
input_dev = input_allocate_device();
if (!input_dev)
return -ENOMEM;
input_dev->evbit[0] = BIT_MASK(EV_KEY);
input_dev->name = "IR-receiver inside an USB DVB receiver";
input_dev->phys = d->rc_phys;
usb_to_input_id(d->udev, &input_dev->id);
input_dev->dev.parent = &d->udev->dev;
input_dev->getkeycode = dvb_usb_getkeycode;
input_dev->setkeycode = dvb_usb_setkeycode;
/* set the bits for the keys */
deb_rc("key map size: %d\n", d->props.rc.legacy.rc_key_map_size);
for (i = 0; i < d->props.rc.legacy.rc_key_map_size; i++) {
deb_rc("setting bit for event %d item %d\n",
d->props.rc.legacy.rc_key_map[i].keycode, i);
set_bit(d->props.rc.legacy.rc_key_map[i].keycode, input_dev->keybit);
}
/* Start the remote-control polling. */
if (d->props.rc.legacy.rc_interval < 40)
d->props.rc.legacy.rc_interval = 100; /* default */
/* setting these two values to non-zero, we have to manage key repeats */
input_dev->rep[REP_PERIOD] = d->props.rc.legacy.rc_interval;
input_dev->rep[REP_DELAY] = d->props.rc.legacy.rc_interval + 150;
input_set_drvdata(input_dev, d);
err = input_register_device(input_dev);
if (err) {
input_free_device(input_dev);
return err;
}
d->rc_input_dev = input_dev;
INIT_DELAYED_WORK(&d->rc_query_work, dvb_usb_read_remote_control);
info("schedule remote query interval to %d msecs.", d->props.rc.legacy.rc_interval);
schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc.legacy.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_rearming_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 ir_scancode *keymap = d->props.rc.legacy.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.legacy.rc_key_map_size; i++)
if (rc5_custom(&keymap[i]) == keybuf[1] &&
rc5_data(&keymap[i]) == keybuf[3]) {
*event = keymap[i].keycode;
*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("unknown type of remote status: %d\n",keybuf[0]);
break;
}
return 0;
}
EXPORT_SYMBOL(dvb_usb_nec_rc_key_to_event);
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