platform/a540/kbd.c

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This source file includes following definitions.
mykbd_task_proceed
mykbd_task
my_kbd_read_keys
wrap_kbd_p1_f
kbd_fetch_data
   1 #include "lolevel.h"
   2 #include "platform.h"
   3 #include "keyboard.h"
   4 #include "kbd_common.h"
   5 
   6 long kbd_new_state[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
   7 long kbd_prev_state[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
   8 long kbd_mod_state[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
   9 
  10 
  11 KeyMap keymap[] = {
  12     /* tiny bug: key order matters. see kbd_get_pressed_key()
  13      * for example
  14      */
  15         {2,KEY_UP       , 0x00000001 },
  16         {2,KEY_DOWN     , 0x00000002 },
  17         {2,KEY_LEFT     , 0x00000008 },
  18         {2,KEY_RIGHT    , 0x00000004 },
  19         {2,KEY_SET      , 0x00000100 },
  20         {2,KEY_SHOOT_FULL, 0x00000030 }, // note 3 here!
  21     {2,KEY_SHOOT_FULL_ONLY, 0x00000020 },
  22         {2,KEY_SHOOT_HALF, 0x00000010 },
  23         {2,KEY_ZOOM_IN  , 0x00000040 },
  24         {2,KEY_ZOOM_OUT , 0x00000080 },
  25         {2,KEY_MENU     , 0x00000200 },
  26         {2,KEY_DISPLAY  , 0x00000400 },
  27         {2,KEY_PRINT    , 0x00001000 },
  28         {2,KEY_ERASE    , 0x00000800 },
  29         {0, 0, 0 }
  30 };
  31 
  32 #define NEW_SS (0x2000)
  33 
  34 static char kbd_stack[NEW_SS];
  35 
  36 long __attribute__((naked)) wrap_kbd_p1_f() ;
  37 
  38 static void __attribute__((noinline)) mykbd_task_proceed()
  39 {
  40     while (physw_run){
  41         _SleepTask(10);
  42 
  43         if (wrap_kbd_p1_f() == 1){ // autorepeat ?
  44             _kbd_p2_f();
  45         }
  46     }
  47 }
  48 
  49 // TODO using C code in naked is unsafe
  50 void __attribute__((naked,noinline)) mykbd_task()
  51 {
  52     /* WARNING
  53      * Stack pointer manipulation performed here!
  54      * This means (but not limited to):
  55      *        function arguments destroyed;
  56      *        function CAN NOT return properly;
  57      *        MUST NOT call or use stack variables before stack
  58      *        is setup properly;
  59      *
  60      */
  61 
  62     register int i;
  63     register long *newstack;
  64 
  65     newstack = (void*)kbd_stack;
  66 
  67     for (i=0;i<NEW_SS/4;i++)
  68         newstack[i]=0xdededede;
  69 
  70     asm volatile (
  71         "MOV        SP, %0"
  72         :: "r"(((char*)newstack)+NEW_SS)
  73         : "memory"
  74     );
  75 
  76     mykbd_task_proceed();
  77 
  78     /* function can be modified to restore SP here...
  79      */
  80 
  81     _ExitTask();
  82 }
  83 
  84 void my_kbd_read_keys()
  85 {
  86     _kbd_pwr_on();
  87 
  88     kbd_update_key_state();
  89 
  90     _kbd_read_keys_r2(physw_status);
  91 
  92     kbd_update_physw_bits();
  93 
  94     _kbd_pwr_off();
  95 }
  96 
  97 long __attribute__((naked,noinline)) wrap_kbd_p1_f()
  98 {
  99 
 100     asm volatile(
 101                 "STMFD   SP!, {R4-R7,LR}\n"
 102                 "SUB     SP, SP, #0xC\n"
 103                 "BL      my_kbd_read_keys\n"
 104                 "B         _kbd_p1_f_cont\n"
 105     );
 106     return 0; // shut up the compiler
 107 }
 108 
 109 void kbd_fetch_data(long *dst)
 110 {
 111     volatile long *mmio0 = (void*)0xc0220200;
 112     volatile long *mmio1 = (void*)0xc0220204;
 113     volatile long *mmio2 = (void*)0xc0220208;
 114 
 115     dst[0] = *mmio0;
 116     dst[1] = *mmio1;
 117     dst[2] = *mmio2 & 0xffff;
 118 }
 119
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root/platform/a540/kbd.c

DEFINITIONS
