drivers/media/dvb/dvb-usb/dvb-usb-remote.c

   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
  24         if (d->props.rc_query(d,&event,&state)) {
  25                 err("error while querying for an remote control event.");
  26                 goto schedule;
  27         }
  28
  29
  30         switch (state) {
  31                 case REMOTE_NO_KEY_PRESSED:
  32                         break;
  33                 case REMOTE_KEY_PRESSED:
  34                         deb_rc("key pressed\n");
  35                         d->last_event = event;
  36                 case REMOTE_KEY_REPEAT:
  37                         deb_rc("key repeated\n");
  38                         input_event(&d->rc_input_dev, EV_KEY, event, 1);
  39                         input_event(&d->rc_input_dev, EV_KEY, d->last_event, 0);
  40                         input_sync(&d->rc_input_dev);
  41                         break;
  42                 default:
  43                         break;
  44         }
  45
  46 /* improved repeat handling ???
  47         switch (state) {
  48                 case REMOTE_NO_KEY_PRESSED:
  49                         deb_rc("NO KEY PRESSED\n");
  50                         if (d->last_state != REMOTE_NO_KEY_PRESSED) {
  51                                 deb_rc("releasing event %d\n",d->last_event);
  52                                 input_event(&d->rc_input_dev, EV_KEY, d->last_event, 0);
  53                                 input_sync(&d->rc_input_dev);
  54                         }
  55                         d->last_state = REMOTE_NO_KEY_PRESSED;
  56                         d->last_event = 0;
  57                         break;
  58                 case REMOTE_KEY_PRESSED:
  59                         deb_rc("KEY PRESSED\n");
  60                         deb_rc("pressing event %d\n",event);
  61
  62                         input_event(&d->rc_input_dev, EV_KEY, event, 1);
  63                         input_sync(&d->rc_input_dev);
  64
  65                         d->last_event = event;
  66                         d->last_state = REMOTE_KEY_PRESSED;
  67                         break;
  68                 case REMOTE_KEY_REPEAT:
  69                         deb_rc("KEY_REPEAT\n");
  70                         if (d->last_state != REMOTE_NO_KEY_PRESSED) {
  71                                 deb_rc("repeating event %d\n",d->last_event);
  72                                 input_event(&d->rc_input_dev, EV_KEY, d->last_event, 2);
  73                                 input_sync(&d->rc_input_dev);
  74                                 d->last_state = REMOTE_KEY_REPEAT;
  75                         }
  76                 default:
  77                         break;
  78         }
  79 */
  80
  81 schedule:
  82         schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc_interval));
  83 }
  84
  85 int dvb_usb_remote_init(struct dvb_usb_device *d)
  86 {
  87         int i;
  88         if (d->props.rc_key_map == NULL)
  89                 return 0;
  90
  91         /* Initialise the remote-control structures.*/
  92         init_input_dev(&d->rc_input_dev);
  93
  94         d->rc_input_dev.evbit[0] = BIT(EV_KEY);
  95         d->rc_input_dev.keycodesize = sizeof(unsigned char);
  96         d->rc_input_dev.keycodemax = KEY_MAX;
  97         d->rc_input_dev.name = "IR-receiver inside an USB DVB receiver";
  98
  99         /* set the bits for the keys */
 100         deb_rc("key map size: %d\n",d->props.rc_key_map_size);
 101         for (i = 0; i < d->props.rc_key_map_size; i++) {
 102                 deb_rc("setting bit for event %d item %d\n",d->props.rc_key_map[i].event, i);
 103                 set_bit(d->props.rc_key_map[i].event, d->rc_input_dev.keybit);
 104         }
 105
 106         /* Start the remote-control polling. */
 107         if (d->props.rc_interval < 40)
 108                 d->props.rc_interval = 100; /* default */
 109
 110         /* setting these two values to non-zero, we have to manage key repeats */
 111         d->rc_input_dev.rep[REP_PERIOD] = d->props.rc_interval;
 112         d->rc_input_dev.rep[REP_DELAY]  = d->props.rc_interval + 150;
 113
 114         input_register_device(&d->rc_input_dev);
 115
 116         INIT_WORK(&d->rc_query_work, dvb_usb_read_remote_control, d);
 117
 118         info("schedule remote query interval to %d msecs.",d->props.rc_interval);
 119         schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc_interval));
 120
 121         d->state |= DVB_USB_STATE_REMOTE;
 122
 123         return 0;
 124 }
 125
 126 int dvb_usb_remote_exit(struct dvb_usb_device *d)
 127 {
 128         if (d->state & DVB_USB_STATE_REMOTE) {
 129                 cancel_delayed_work(&d->rc_query_work);
 130                 flush_scheduled_work();
 131                 input_unregister_device(&d->rc_input_dev);
 132         }
 133         d->state &= ~DVB_USB_STATE_REMOTE;
 134         return 0;
 135 }
 136
 137 #define DVB_USB_RC_NEC_EMPTY           0x00
 138 #define DVB_USB_RC_NEC_KEY_PRESSED     0x01
 139 #define DVB_USB_RC_NEC_KEY_REPEATED    0x02
 140 int dvb_usb_nec_rc_key_to_event(struct dvb_usb_device *d,
 141                 u8 keybuf[5], u32 *event, int *state)
 142 {
 143         int i;
 144         struct dvb_usb_rc_key *keymap = d->props.rc_key_map;
 145         *event = 0;
 146         *state = REMOTE_NO_KEY_PRESSED;
 147         switch (keybuf[0]) {
 148                 case DVB_USB_RC_NEC_EMPTY:
 149                         break;
 150                 case DVB_USB_RC_NEC_KEY_PRESSED:
 151                         if ((u8) ~keybuf[1] != keybuf[2] ||
 152                                 (u8) ~keybuf[3] != keybuf[4]) {
 153                                 deb_err("remote control checksum failed.\n");
 154                                 break;
 155                         }
 156                         /* See if we can match the raw key code. */
 157                         for (i = 0; i < sizeof(keymap)/sizeof(struct dvb_usb_rc_key); i++)
 158                                 if (keymap[i].custom == keybuf[1] &&
 159                                         keymap[i].data == keybuf[3]) {
 160                                         *event = keymap[i].event;
 161                                         *state = REMOTE_KEY_PRESSED;
 162                                         break;
 163                                 }
 164                         deb_err("key mapping failed - no appropriate key found in keymapping\n");
 165                         break;
 166                 case DVB_USB_RC_NEC_KEY_REPEATED:
 167                         *state = REMOTE_KEY_REPEAT;
 168                         break;
 169                 default:
 170                         deb_err("unkown type of remote status: %d\n",keybuf[0]);
 171                         break;
 172         }
 173         return 0;
 174 }
 175 EXPORT_SYMBOL(dvb_usb_nec_rc_key_to_event);