#include "lolevel.h"
#include "platform.h"
#include "keyboard.h"
#include "kbd_common.h"

long kbd_new_state[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
long kbd_prev_state[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
long kbd_mod_state[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };

KeyMap keymap[] = {
    /* tiny bug: key order matters. see kbd_get_pressed_key()
     * for example
     */
        {2, KEY_UP      , 0x00000020 },
        {2, KEY_DOWN    , 0x00000040 }, 
        {2, KEY_LEFT    , 0x00000080 }, 
        {2, KEY_RIGHT   , 0x00000100 },
        {2, KEY_SET     , 0x00000200 },
        {2, KEY_SHOOT_HALF, 0x00000002 },
        {2, KEY_SHOOT_FULL, 0x00000006 }, // note 6 here
        {2, KEY_SHOOT_FULL_ONLY, 0x00000004 },
        {2, KEY_ZOOM_IN , 0x00000008 },
        {2, KEY_ZOOM_OUT, 0x00000010 },
        {2, KEY_MENU    , 0x00000400 },
        {2, KEY_DISPLAY , 0x00000800 },
        {2, KEY_PRINT   , 0x00002000 },
        {0,  0, 0 }
};


#define NEW_SS (0x2000)

static char kbd_stack[NEW_SS];

long __attribute__((naked)) wrap_kbd_p1_f();

static void __attribute__((noinline)) mykbd_task_proceed()
{
    while (physw_run){
	_SleepTask(10);

	if (wrap_kbd_p1_f() == 1){ // autorepeat ?
	    _kbd_p2_f();
	}
    }
}

void __attribute__((naked,noinline)) mykbd_task()
{
    /* WARNING
     * Stack pointer manipulation performed here!
     * This means (but not limited to):
     *	function arguments destroyed;
     *	function CAN NOT return properly;
     *	MUST NOT call or use stack variables before stack
     *	is setup properly;
     *
     */

    register int i;
    register long *newstack;

    newstack = (void*)kbd_stack;

    for (i=0;i<NEW_SS/4;i++)
	newstack[i]=0xdededede;

    asm volatile (
	"MOV	SP, %0"
	:: "r"(((char*)newstack)+NEW_SS)
	: "memory"
    );

    mykbd_task_proceed();

    /* function can be modified to restore SP here...
     */

    _ExitTask();
}


long __attribute__((naked,noinline)) wrap_kbd_p1_f()
{

    asm volatile(
                "STMFD   SP!, {R4-R7,LR}\n"
                "SUB     SP, SP, #0xC\n"
                "BL      my_kbd_read_keys\n"
		"B	 _kbd_p1_f_cont\n"
    );
    return 0; // shut up the compiler
}


void my_kbd_read_keys()
{
    _kbd_pwr_on();

    kbd_update_key_state();

    _kbd_read_keys_r2(physw_status);

    kbd_update_physw_bits();

    _kbd_pwr_off();
}

void kbd_fetch_data(long *dst)
{
    volatile long *mmio1 = (void*)0xc0220204;
    volatile long *mmio2 = (void*)0xc0220208;

    dst[0] = 0;
    dst[1] = *mmio1;
    dst[2] = *mmio2 & 0xffff;
}