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         /* 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
  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;
  92
  93         if (d->props.rc_key_map == NULL ||
  94                 d->props.rc_query == NULL ||
  95                 dvb_usb_disable_rc_polling)
  96                 return 0;
  97
  98         usb_make_path(d->udev, d->rc_phys, sizeof(d->rc_phys));
  99         strlcpy(d->rc_phys, "/ir0", sizeof(d->rc_phys));
 100
 101         d->rc_input_dev = input_allocate_device();
 102         if (!d->rc_input_dev)
 103                 return -ENOMEM;
 104
 105         d->rc_input_dev->evbit[0] = BIT(EV_KEY);
 106         d->rc_input_dev->keycodesize = sizeof(unsigned char);
 107         d->rc_input_dev->keycodemax = KEY_MAX;
 108         d->rc_input_dev->name = "IR-receiver inside an USB DVB receiver";
 109         d->rc_input_dev->phys = d->rc_phys;
 110
 111         /* set the bits for the keys */
 112         deb_rc("key map size: %d\n", d->props.rc_key_map_size);
 113         for (i = 0; i < d->props.rc_key_map_size; i++) {
 114                 deb_rc("setting bit for event %d item %d\n",d->props.rc_key_map[i].event, i);
 115                 set_bit(d->props.rc_key_map[i].event, d->rc_input_dev->keybit);
 116         }
 117
 118         /* Start the remote-control polling. */
 119         if (d->props.rc_interval < 40)
 120                 d->props.rc_interval = 100; /* default */
 121
 122         /* setting these two values to non-zero, we have to manage key repeats */
 123         d->rc_input_dev->rep[REP_PERIOD] = d->props.rc_interval;
 124         d->rc_input_dev->rep[REP_DELAY]  = d->props.rc_interval + 150;
 125
 126         input_register_device(d->rc_input_dev);
 127
 128         INIT_WORK(&d->rc_query_work, dvb_usb_read_remote_control, d);
 129
 130         info("schedule remote query interval to %d msecs.", d->props.rc_interval);
 131         schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc_interval));
 132
 133         d->state |= DVB_USB_STATE_REMOTE;
 134
 135         return 0;
 136 }
 137
 138 int dvb_usb_remote_exit(struct dvb_usb_device *d)
 139 {
 140         if (d->state & DVB_USB_STATE_REMOTE) {
 141                 cancel_delayed_work(&d->rc_query_work);
 142                 flush_scheduled_work();
 143                 input_unregister_device(d->rc_input_dev);
 144         }
 145         d->state &= ~DVB_USB_STATE_REMOTE;
 146         return 0;
 147 }
 148
 149 #define DVB_USB_RC_NEC_EMPTY           0x00
 150 #define DVB_USB_RC_NEC_KEY_PRESSED     0x01
 151 #define DVB_USB_RC_NEC_KEY_REPEATED    0x02
 152 int dvb_usb_nec_rc_key_to_event(struct dvb_usb_device *d,
 153                 u8 keybuf[5], u32 *event, int *state)
 154 {
 155         int i;
 156         struct dvb_usb_rc_key *keymap = d->props.rc_key_map;
 157         *event = 0;
 158         *state = REMOTE_NO_KEY_PRESSED;
 159         switch (keybuf[0]) {
 160                 case DVB_USB_RC_NEC_EMPTY:
 161                         break;
 162                 case DVB_USB_RC_NEC_KEY_PRESSED:
 163                         if ((u8) ~keybuf[1] != keybuf[2] ||
 164                                 (u8) ~keybuf[3] != keybuf[4]) {
 165                                 deb_err("remote control checksum failed.\n");
 166                                 break;
 167                         }
 168                         /* See if we can match the raw key code. */
 169                         for (i = 0; i < d->props.rc_key_map_size; i++)
 170                                 if (keymap[i].custom == keybuf[1] &&
 171                                         keymap[i].data == keybuf[3]) {
 172                                         *event = keymap[i].event;
 173                                         *state = REMOTE_KEY_PRESSED;
 174                                         return 0;
 175                                 }
 176                         deb_err("key mapping failed - no appropriate key found in keymapping\n");
 177                         break;
 178                 case DVB_USB_RC_NEC_KEY_REPEATED:
 179                         *state = REMOTE_KEY_REPEAT;
 180                         break;
 181                 default:
 182                         deb_err("unkown type of remote status: %d\n",keybuf[0]);
 183                         break;
 184         }
 185         return 0;
 186 }
 187 EXPORT_SYMBOL(dvb_usb_nec_rc_key_to_event);