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/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Raw keyboard I/O layer for MEC1322
*/
#include "gpio.h"
#include "keyboard_config.h"
#include "keyboard_raw.h"
#include "keyboard_scan.h"
#include "registers.h"
#include "task.h"
#include "util.h"
void keyboard_raw_init(void)
{
keyboard_raw_enable_interrupt(0);
gpio_config_module(MODULE_KEYBOARD_SCAN, 1);
/* Enable keyboard scan interrupt */
MEC1322_INT_ENABLE(17) |= 1 << 21;
MEC1322_INT_BLK_EN |= 1 << 17;
MEC1322_KS_KSI_INT_EN = 0xff;
}
void keyboard_raw_task_start(void)
{
task_enable_irq(MEC1322_IRQ_KSC_INT);
}
test_mockable void keyboard_raw_drive_column(int out)
{
if (out == KEYBOARD_COLUMN_ALL)
MEC1322_KS_KSO_SEL = 1 << 5; /* KSEN=0, KSALL=1 */
else if (out == KEYBOARD_COLUMN_NONE)
MEC1322_KS_KSO_SEL = 1 << 6; /* KSEN=1 */
else
MEC1322_KS_KSO_SEL = out + 4; /* KSO starts from KSO04 */
}
test_mockable int keyboard_raw_read_rows(void)
{
/* Invert it so 0=not pressed, 1=pressed */
return (MEC1322_KS_KSI_INPUT & 0xff) ^ 0xff;
}
void keyboard_raw_enable_interrupt(int enable)
{
if (enable) {
task_clear_pending_irq(MEC1322_IRQ_KSC_INT);
task_enable_irq(MEC1322_IRQ_KSC_INT);
} else {
task_disable_irq(MEC1322_IRQ_KSC_INT);
}
}
static void keyboard_raw_interrupt(void)
{
/* Clear interrupt status bits */
MEC1322_KS_KSI_STATUS = 0xff;
/* Wake keyboard scan task to handle interrupt */
task_wake(TASK_ID_KEYSCAN);
}
DECLARE_IRQ(MEC1322_IRQ_KSC_INT, keyboard_raw_interrupt, 1);
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