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 #include "av7110_hw.h"
  11
  12 #define UP_TIMEOUT (HZ*7/25)
  13
  14 /* enable ir debugging by or'ing debug with 16 */
  15
  16 static int av_cnt;
  17 static struct av7110 *av_list[4];
  18 static struct input_dev *input_dev;
  19
  20 static u8 delay_timer_finished;
  21
  22 static u16 key_map [256] = {
  23         KEY_0, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7,
  24         KEY_8, KEY_9, KEY_BACK, 0, KEY_POWER, KEY_MUTE, 0, KEY_INFO,
  25         KEY_VOLUMEUP, KEY_VOLUMEDOWN, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  26         KEY_CHANNELUP, KEY_CHANNELDOWN, 0, 0, 0, 0, 0, 0,
  27         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  28         0, 0, 0, 0, KEY_TEXT, 0, 0, KEY_TV, 0, 0, 0, 0, 0, KEY_SETUP, 0, 0,
  29         0, 0, 0, KEY_SUBTITLE, 0, 0, KEY_LANGUAGE, 0,
  30         KEY_RADIO, 0, 0, 0, 0, KEY_EXIT, 0, 0,
  31         KEY_UP, KEY_DOWN, KEY_LEFT, KEY_RIGHT, KEY_OK, 0, 0, 0,
  32         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_RED, KEY_GREEN, KEY_YELLOW,
  33         KEY_BLUE, 0, 0, 0, 0, 0, 0, 0, KEY_MENU, KEY_LIST, 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, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  37         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  38         0, 0, 0, 0, KEY_UP, KEY_UP, KEY_DOWN, KEY_DOWN,
  39         0, 0, 0, 0, KEY_EPG, 0, 0, 0,
  40         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  41         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  42         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_VCR
  43 };
  44
  45
  46 static void av7110_emit_keyup(unsigned long data)
  47 {
  48         if (!data || !test_bit(data, input_dev->key))
  49                 return;
  50
  51         input_event(input_dev, EV_KEY, data, !!0);
  52 }
  53
  54
  55 static struct timer_list keyup_timer = { .function = av7110_emit_keyup };
  56
  57
  58 static void av7110_emit_key(unsigned long parm)
  59 {
  60         struct av7110 *av7110 = (struct av7110 *) parm;
  61         u32 ir_config = av7110->ir_config;
  62         u32 ircom = av7110->ir_command;
  63         u8 data;
  64         u8 addr;
  65         static u16 old_toggle = 0;
  66         u16 new_toggle;
  67         u16 keycode;
  68
  69         /* extract device address and data */
  70         switch (ir_config & 0x0003) {
  71         case 0: /* RC5: 5 bits device address, 6 bits data */
  72                 data = ircom & 0x3f;
  73                 addr = (ircom >> 6) & 0x1f;
  74                 break;
  75
  76         case 1: /* RCMM: 8(?) bits device address, 8(?) bits data */
  77                 data = ircom & 0xff;
  78                 addr = (ircom >> 8) & 0xff;
  79                 break;
  80
  81         case 2: /* extended RC5: 5 bits device address, 7 bits data */
  82                 data = ircom & 0x3f;
  83                 addr = (ircom >> 6) & 0x1f;
  84                 /* invert 7th data bit for backward compatibility with RC5 keymaps */
  85                 if (!(ircom & 0x1000))
  86                         data |= 0x40;
  87                 break;
  88
  89         default:
  90                 printk("invalid ir_config %x\n", ir_config);
  91                 return;
  92         }
  93
  94         keycode = key_map[data];
  95
  96         dprintk(16, "code %08x -> addr %i data 0x%02x -> keycode %i\n",
  97                 ircom, addr, data, keycode);
  98
  99         /* check device address (if selected) */
 100         if (ir_config & 0x4000)
 101                 if (addr != ((ir_config >> 16) & 0xff))
 102                         return;
 103
 104         if (!keycode) {
 105                 printk ("%s: unknown key 0x%02x!!\n", __FUNCTION__, data);
 106                 return;
 107         }
 108
 109         if ((ir_config & 0x0003) == 1)
 110                 new_toggle = 0; /* RCMM */
 111         else
 112                 new_toggle = (ircom & 0x800); /* RC5, extended RC5 */
 113
 114         if (timer_pending(&keyup_timer)) {
 115                 del_timer(&keyup_timer);
 116                 if (keyup_timer.data != keycode || new_toggle != old_toggle) {
 117                         delay_timer_finished = 0;
 118                         input_event(input_dev, EV_KEY, keyup_timer.data, !!0);
 119                         input_event(input_dev, EV_KEY, keycode, !0);
 120                 } else
 121                         if (delay_timer_finished)
 122                                 input_event(input_dev, EV_KEY, keycode, 2);
 123         } else {
 124                 delay_timer_finished = 0;
 125                 input_event(input_dev, EV_KEY, keycode, !0);
 126         }
 127
 128         keyup_timer.expires = jiffies + UP_TIMEOUT;
 129         keyup_timer.data = keycode;
 130
 131         add_timer(&keyup_timer);
 132
 133         old_toggle = new_toggle;
 134 }
 135
 136 static void input_register_keys(void)
 137 {
 138         int i;
 139
 140         memset(input_dev->keybit, 0, sizeof(input_dev->keybit));
 141
 142         for (i = 0; i < ARRAY_SIZE(key_map); i++) {
 143                 if (key_map[i] > KEY_MAX)
 144                         key_map[i] = 0;
 145                 else if (key_map[i] > KEY_RESERVED)
 146                         set_bit(key_map[i], input_dev->keybit);
 147         }
 148 }
 149
 150
 151 static void input_repeat_key(unsigned long data)
 152 {
 153         /* called by the input driver after rep[REP_DELAY] ms */
 154         delay_timer_finished = 1;
 155 }
 156
 157
 158 static int av7110_ir_write_proc(struct file *file, const char __user *buffer,
 159                                 unsigned long count, void *data)
 160 {
 161         char *page;
 162         int size = 4 + 256 * sizeof(u16);
 163         u32 ir_config;
 164         int i;
 165
 166         if (count < size)
 167                 return -EINVAL;
 168
 169         page = (char *) vmalloc(size);
 170         if (!page)
 171                 return -ENOMEM;
 172
 173         if (copy_from_user(page, buffer, size)) {
 174                 vfree(page);
 175                 return -EFAULT;
 176         }
 177
 178         memcpy(&ir_config, page, 4);
 179         memcpy(&key_map, page + 4, 256 * sizeof(u16));
 180         vfree(page);
 181         if (FW_VERSION(av_list[0]->arm_app) >= 0x2620 && !(ir_config & 0x0001))
 182                 ir_config |= 0x0002; /* enable extended RC5 */
 183         for (i = 0; i < av_cnt; i++)
 184                 av7110_setup_irc_config(av_list[i], ir_config);
 185         input_register_keys();
 186         return count;
 187 }
 188
 189
 190 int av7110_setup_irc_config(struct av7110 *av7110, u32 ir_config)
 191 {
 192         int ret = 0;
 193
 194         dprintk(4, "%p\n", av7110);
 195         if (av7110) {
 196                 ret = av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, SetIR, 1, ir_config);
 197                 av7110->ir_config = ir_config;
 198         }
 199         return ret;
 200 }
 201
 202
 203 static void ir_handler(struct av7110 *av7110, u32 ircom)
 204 {
 205         dprintk(4, "ircommand = %08x\n", ircom);
 206         av7110->ir_command = ircom;
 207         tasklet_schedule(&av7110->ir_tasklet);
 208 }
 209
 210
 211 int __init av7110_ir_init(struct av7110 *av7110)
 212 {
 213         static struct proc_dir_entry *e;
 214
 215         if (av_cnt >= sizeof av_list/sizeof av_list[0])
 216                 return -ENOSPC;
 217
 218         av7110_setup_irc_config(av7110, 0x0001);
 219         av_list[av_cnt++] = av7110;
 220
 221         if (av_cnt == 1) {
 222                 init_timer(&keyup_timer);
 223                 keyup_timer.data = 0;
 224
 225                 input_dev = input_allocate_device();
 226                 if (!input_dev)
 227                         return -ENOMEM;
 228
 229                 input_dev->name = "DVB on-card IR receiver";
 230
 231                 set_bit(EV_KEY, input_dev->evbit);
 232                 set_bit(EV_REP, input_dev->evbit);
 233                 input_register_keys();
 234                 input_register_device(input_dev);
 235                 input_dev->timer.function = input_repeat_key;
 236
 237                 e = create_proc_entry("av7110_ir", S_IFREG | S_IRUGO | S_IWUSR, NULL);
 238                 if (e) {
 239                         e->write_proc = av7110_ir_write_proc;
 240                         e->size = 4 + 256 * sizeof(u16);
 241                 }
 242         }
 243
 244         tasklet_init(&av7110->ir_tasklet, av7110_emit_key, (unsigned long) av7110);
 245         av7110->ir_handler = ir_handler;
 246
 247         return 0;
 248 }
 249
 250
 251 void __exit av7110_ir_exit(struct av7110 *av7110)
 252 {
 253         int i;
 254
 255         if (av_cnt == 0)
 256                 return;
 257
 258         av7110->ir_handler = NULL;
 259         tasklet_kill(&av7110->ir_tasklet);
 260         for (i = 0; i < av_cnt; i++)
 261                 if (av_list[i] == av7110) {
 262                         av_list[i] = av_list[av_cnt-1];
 263                         av_list[av_cnt-1] = NULL;
 264                         break;
 265                 }
 266
 267         if (av_cnt == 1) {
 268                 del_timer_sync(&keyup_timer);
 269                 remove_proc_entry("av7110_ir", NULL);
 270                 input_unregister_device(input_dev);
 271         }
 272
 273         av_cnt--;
 274 }
 275
 276 //MODULE_AUTHOR("Holger Waechtler <holger@convergence.de>");
 277 //MODULE_LICENSE("GPL");