hwsynkp.c File Reference

#include "precomp.h"

Include dependency graph for hwsynkp.c:

Go to the source code of this file.

Functions
VOID NTAPI	LlbHwOmap3SynKpdInitialize (VOID)
BOOLEAN NTAPI	LlbHwKbdReady (VOID)
INT NTAPI	LlbHwKbdRead (VOID)

Variables
UCHAR	KeyboardMatrixStatus [8]
BOOLEAN	LastState = FALSE

Function Documentation

LlbHwKbdRead()

INT NTAPI LlbHwKbdRead

(

VOID

)

Definition at line 59 of file hwsynkp.c.

{
    UCHAR ActiveCol = 0, ActiveRow = 0, col, coldata, row;
 
    for (col = 0; col < 8; col++)
    {
        coldata = LlbHwOmap3TwlRead1(0x4A, 0xDB + col);
        if (coldata)
        {
            for (row = 0; row < 8; row++)
            {
                if (coldata == (1 << row))
                {
                    ActiveRow = row;
                    ActiveCol = col;
                    break;
                }
            }
        }
    }
 
    return ((ActiveCol << 4) | ActiveRow);
}

LlbHwKbdReady()

BOOLEAN NTAPI LlbHwKbdReady

(

VOID

)

Definition at line 43 of file hwsynkp.c.

{
    UCHAR Value;
 
    Value = LlbHwOmap3TwlRead1(0x4A, 0xE3);
    if (!Value) return FALSE;
 
    LastState ^= 1;
    if (!LastState) return FALSE;
 
    /* Return whether or not an interrupt is pending */
    return TRUE;
}

LlbHwOmap3SynKpdInitialize()

VOID NTAPI LlbHwOmap3SynKpdInitialize

(

VOID

)

Definition at line 15 of file hwsynkp.c.

{
    /* Set GPIO pin 8 on the TWL4030 as an output pin */
    LlbHwOmap3TwlWrite1(0x49, 0x9B, 0xC0);
 
    /* Set GPIO pin 8 signal on the TWL4030 ON. This powers the keypad backlight */
    LlbHwOmap3TwlWrite1(0x49, 0xA4, 0xC0);
 
    /* Set PENDDIS and COR on the the keypad interrupt controller */
    LlbHwOmap3TwlWrite1(0x4A, 0xE9, 0x06);
 
    /* Only falling edge detection for key pressed */
    LlbHwOmap3TwlWrite1(0x4A, 0xE8, 0x01);
 
    /* Unmask key-pressed events */
    LlbHwOmap3TwlWrite1(0x4A, 0xE4, 0x0E);
 
    /* Set the keypad control register to turn hardware sequencing and turn it on */
    LlbHwOmap3TwlWrite1(0x4A, 0xD2, 0x0);
    LlbHwOmap3TwlRead1(0x4A, 0xE3);
    LlbHwOmap3TwlWrite1(0x4A, 0xD2, 0x43);
}

Referenced by LlbHwInitialize().

Variable Documentation

KeyboardMatrixStatus

UCHAR KeyboardMatrixStatus[8]

Definition at line 38 of file hwsynkp.c.

LastState

BOOLEAN LastState = FALSE

Definition at line 39 of file hwsynkp.c.

Referenced by Ext2McbReaperThread(), and LlbHwKbdReady().