diff options
Diffstat (limited to 'drivers/media/dvb/dvb-usb/dvb-usb-remote.c')
| -rw-r--r-- | drivers/media/dvb/dvb-usb/dvb-usb-remote.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-remote.c b/drivers/media/dvb/dvb-usb/dvb-usb-remote.c new file mode 100644 index 00000000000..9f1e23f82ba --- /dev/null +++ b/drivers/media/dvb/dvb-usb/dvb-usb-remote.c @@ -0,0 +1,175 @@ +/* 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.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) + 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); |