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https://github.com/reactos/reactos.git
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83 lines
2 KiB
C
83 lines
2 KiB
C
/*
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* PROJECT: ReactOS Boot Loader
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* LICENSE: BSD - See COPYING.ARM in the top level directory
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* FILE: boot/armllb/hw/omap3-zoom2/hwsynkp.c
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* PURPOSE: LLB Synpatics Keypad Support for OMAP3 ZOOM 2
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* PROGRAMMERS: ReactOS Portable Systems Group
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*/
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#include "precomp.h"
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/* FUNCTIONS ******************************************************************/
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VOID
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NTAPI
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LlbHwOmap3SynKpdInitialize(VOID)
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{
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/* Set GPIO pin 8 on the TWL4030 as an output pin */
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LlbHwOmap3TwlWrite1(0x49, 0x9B, 0xC0);
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/* Set GPIO pin 8 signal on the TWL4030 ON. This powers the keypad backlight */
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LlbHwOmap3TwlWrite1(0x49, 0xA4, 0xC0);
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/* Set PENDDIS and COR on the the keypad interrupt controller */
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LlbHwOmap3TwlWrite1(0x4A, 0xE9, 0x06);
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/* Only falling edge detection for key pressed */
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LlbHwOmap3TwlWrite1(0x4A, 0xE8, 0x01);
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/* Unmask key-pressed events */
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LlbHwOmap3TwlWrite1(0x4A, 0xE4, 0x0E);
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/* Set the keypad control register to turn hardware sequencing and turn it on */
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LlbHwOmap3TwlWrite1(0x4A, 0xD2, 0x0);
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LlbHwOmap3TwlRead1(0x4A, 0xE3);
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LlbHwOmap3TwlWrite1(0x4A, 0xD2, 0x43);
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}
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UCHAR KeyboardMatrixStatus[8];
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BOOLEAN LastState = FALSE;
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BOOLEAN
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NTAPI
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LlbHwKbdReady(VOID)
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{
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UCHAR Value;
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Value = LlbHwOmap3TwlRead1(0x4A, 0xE3);
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if (!Value) return FALSE;
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LastState ^= 1;
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if (!LastState) return FALSE;
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/* Return whether or not an interrupt is pending */
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return TRUE;
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}
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INT
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NTAPI
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LlbHwKbdRead(VOID)
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{
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UCHAR ActiveCol = 0, ActiveRow = 0, col, coldata, row;
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for (col = 0; col < 8; col++)
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{
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coldata = LlbHwOmap3TwlRead1(0x4A, 0xDB + col);
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if (coldata)
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{
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for (row = 0; row < 8; row++)
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{
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if (coldata == (1 << row))
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{
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ActiveRow = row;
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ActiveCol = col;
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break;
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}
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}
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}
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}
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return ((ActiveCol << 4) | ActiveRow);
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}
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/* EOF */
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