drivers/media/dvb/ttpci/av7110_ir.c

   1 #include <linux/types.h>
   2 #include <linux/init.h>
   3 #include <linux/module.h>
   4 #include <linux/moduleparam.h>
   5 #include <linux/input.h>
   6 #include <linux/proc_fs.h>
   7 #include <asm/bitops.h>
   8
   9 #include "av7110.h"
  10
  11 #define UP_TIMEOUT (HZ/4)
  12
  13 /* enable ir debugging by or'ing av7110_debug with 16 */
  14
  15 static int ir_initialized;
  16 static struct input_dev input_dev;
  17
  18 static u32 ir_config;
  19
  20 static u16 key_map [256] = {
  21         KEY_0, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7,
  22         KEY_8, KEY_9, KEY_BACK, 0, KEY_POWER, KEY_MUTE, 0, KEY_INFO,
  23         KEY_VOLUMEUP, KEY_VOLUMEDOWN, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  24         KEY_CHANNELUP, KEY_CHANNELDOWN, 0, 0, 0, 0, 0, 0,
  25         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  26         0, 0, 0, 0, KEY_TEXT, 0, 0, KEY_TV, 0, 0, 0, 0, 0, KEY_SETUP, 0, 0,
  27         0, 0, 0, KEY_SUBTITLE, 0, 0, KEY_LANGUAGE, 0,
  28         KEY_RADIO, 0, 0, 0, 0, KEY_EXIT, 0, 0,
  29         KEY_UP, KEY_DOWN, KEY_LEFT, KEY_RIGHT, KEY_OK, 0, 0, 0,
  30         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_RED, KEY_GREEN, KEY_YELLOW,
  31         KEY_BLUE, 0, 0, 0, 0, 0, 0, 0, KEY_MENU, KEY_LIST, 0, 0, 0, 0, 0, 0,
  32         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  33         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  34         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  35         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  36         0, 0, 0, 0, KEY_UP, KEY_UP, KEY_DOWN, KEY_DOWN,
  37         0, 0, 0, 0, KEY_EPG, 0, 0, 0,
  38         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  39         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  40         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_VCR
  41 };
  42
  43
  44 static void av7110_emit_keyup(unsigned long data)
  45 {
  46         if (!data || !test_bit(data, input_dev.key))
  47                 return;
  48
  49         input_event(&input_dev, EV_KEY, data, !!0);
  50 }
  51
  52
  53 static struct timer_list keyup_timer = { .function = av7110_emit_keyup };
  54
  55
  56 static void av7110_emit_key(u32 ircom)
  57 {
  58         u8 data;
  59         u8 addr;
  60         static u16 old_toggle = 0;
  61         u16 new_toggle;
  62         u16 keycode;
  63
  64         /* extract device address and data */
  65         if (ir_config & 0x0001) {
  66                 /* TODO RCMM: ? bits device address, 8 bits data */
  67                 data = ircom & 0xff;
  68                 addr = (ircom >> 8) & 0xff;
  69         } else {
  70                 /* RC5: 5 bits device address, 6 bits data */
  71                 data = ircom & 0x3f;
  72                 addr = (ircom >> 6) & 0x1f;
  73         }
  74
  75         keycode = key_map[data];
  76
  77         dprintk(16, "#########%08x######### addr %i data 0x%02x (keycode %i)\n",
  78                 ircom, addr, data, keycode);
  79
  80         /* check device address (if selected) */
  81         if (ir_config & 0x4000)
  82                 if (addr != ((ir_config >> 16) & 0xff))
  83                         return;
  84
  85         if (!keycode) {
  86                 printk ("%s: unknown key 0x%02x!!\n", __FUNCTION__, data);
  87                 return;
  88         }
  89
  90         if (ir_config & 0x0001)
  91                 new_toggle = 0; /* RCMM */
  92         else
  93                 new_toggle = (ircom & 0x800); /* RC5 */
  94
  95         if (timer_pending(&keyup_timer)) {
  96                 del_timer(&keyup_timer);
  97                 if (keyup_timer.data != keycode || new_toggle != old_toggle) {
  98                         input_event(&input_dev, EV_KEY, keyup_timer.data, !!0);
  99                         input_event(&input_dev, EV_KEY, keycode, !0);
 100                 } else
 101                         input_event(&input_dev, EV_KEY, keycode, 2);
 102
 103         } else
 104                 input_event(&input_dev, EV_KEY, keycode, !0);
 105
 106         keyup_timer.expires = jiffies + UP_TIMEOUT;
 107         keyup_timer.data = keycode;
 108
 109         add_timer(&keyup_timer);
 110
 111         old_toggle = new_toggle;
 112 }
 113
 114 static void input_register_keys(void)
 115 {
 116         int i;
 117
 118         memset(input_dev.keybit, 0, sizeof(input_dev.keybit));
 119
 120         for (i = 0; i < sizeof(key_map) / sizeof(key_map[0]); i++) {
 121                 if (key_map[i] > KEY_MAX)
 122                         key_map[i] = 0;
 123                 else if (key_map[i] > KEY_RESERVED)
 124                         set_bit(key_map[i], input_dev.keybit);
 125         }
 126 }
 127
 128
 129 static void input_repeat_key(unsigned long data)
 130 {
 131        /* dummy routine to disable autorepeat in the input driver */
 132 }
 133
 134
 135 static int av7110_ir_write_proc(struct file *file, const char __user *buffer,
 136                                 unsigned long count, void *data)
 137 {
 138         char *page;
 139         int size = 4 + 256 * sizeof(u16);
 140
 141         if (count < size)
 142                 return -EINVAL;
 143
 144         page = (char *) vmalloc(size);
 145         if (!page)
 146                 return -ENOMEM;
 147
 148         if (copy_from_user(page, buffer, size)) {
 149                 vfree(page);
 150                 return -EFAULT;
 151         }
 152
 153         memcpy(&ir_config, page, 4);
 154         memcpy(&key_map, page + 4, 256 * sizeof(u16));
 155         vfree(page);
 156         av7110_setup_irc_config(NULL, ir_config);
 157         input_register_keys();
 158         return count;
 159 }
 160
 161
 162 int __init av7110_ir_init(void)
 163 {
 164         static struct proc_dir_entry *e;
 165
 166         if (ir_initialized)
 167                 return 0;
 168
 169         init_timer(&keyup_timer);
 170         keyup_timer.data = 0;
 171
 172         input_dev.name = "DVB on-card IR receiver";
 173
 174         /**
 175          *  enable keys
 176          */
 177         set_bit(EV_KEY, input_dev.evbit);
 178         set_bit(EV_REP, input_dev.evbit);
 179
 180         input_register_keys();
 181
 182         input_register_device(&input_dev);
 183         input_dev.timer.function = input_repeat_key;
 184
 185         av7110_setup_irc_config(NULL, 0x0001);
 186         av7110_register_irc_handler(av7110_emit_key);
 187
 188         e = create_proc_entry("av7110_ir", S_IFREG | S_IRUGO | S_IWUSR, NULL);
 189         if (e) {
 190                 e->write_proc = av7110_ir_write_proc;
 191                 e->size = 4 + 256 * sizeof(u16);
 192         }
 193
 194         ir_initialized = 1;
 195         return 0;
 196 }
 197
 198
 199 void __exit av7110_ir_exit(void)
 200 {
 201         if (ir_initialized == 0)
 202                 return;
 203         del_timer_sync(&keyup_timer);
 204         remove_proc_entry("av7110_ir", NULL);
 205         av7110_unregister_irc_handler(av7110_emit_key);
 206         input_unregister_device(&input_dev);
 207         ir_initialized = 0;
 208 }
 209
 210 //MODULE_AUTHOR("Holger Waechtler <holger@convergence.de>");
 211 //MODULE_LICENSE("GPL");
 212