89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
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/* Copyright 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Raw keyboard I/O layer for MEC1322
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*/
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#include "gpio.h"
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#include "keyboard_config.h"
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#include "keyboard_raw.h"
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#include "keyboard_scan.h"
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#include "registers.h"
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#include "task.h"
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#include "util.h"
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void keyboard_raw_init(void)
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{
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keyboard_raw_enable_interrupt(0);
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gpio_config_module(MODULE_KEYBOARD_SCAN, 1);
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/* Enable keyboard scan interrupt */
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MEC1322_INT_ENABLE(17) |= BIT(21);
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MEC1322_INT_BLK_EN |= BIT(17);
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MEC1322_KS_KSI_INT_EN = 0xff;
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}
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void keyboard_raw_task_start(void)
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{
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task_enable_irq(MEC1322_IRQ_KSC_INT);
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}
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test_mockable void keyboard_raw_drive_column(int out)
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{
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if (out == KEYBOARD_COLUMN_ALL) {
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MEC1322_KS_KSO_SEL = BIT(5); /* KSEN=0, KSALL=1 */
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#ifdef CONFIG_KEYBOARD_COL2_INVERTED
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gpio_set_level(GPIO_KBD_KSO2, 1);
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#endif
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} else if (out == KEYBOARD_COLUMN_NONE) {
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MEC1322_KS_KSO_SEL = BIT(6); /* KSEN=1 */
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#ifdef CONFIG_KEYBOARD_COL2_INVERTED
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gpio_set_level(GPIO_KBD_KSO2, 0);
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#endif
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} else {
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#ifdef CONFIG_KEYBOARD_COL2_INVERTED
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if (out == 2) {
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MEC1322_KS_KSO_SEL = BIT(6); /* KSEN=1 */
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gpio_set_level(GPIO_KBD_KSO2, 1);
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} else {
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MEC1322_KS_KSO_SEL = out + CONFIG_KEYBOARD_KSO_BASE;
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gpio_set_level(GPIO_KBD_KSO2, 0);
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}
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#else
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MEC1322_KS_KSO_SEL = out + CONFIG_KEYBOARD_KSO_BASE;
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#endif
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}
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}
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test_mockable int keyboard_raw_read_rows(void)
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{
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/* Invert it so 0=not pressed, 1=pressed */
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return (MEC1322_KS_KSI_INPUT & 0xff) ^ 0xff;
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}
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void keyboard_raw_enable_interrupt(int enable)
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{
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if (enable) {
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task_clear_pending_irq(MEC1322_IRQ_KSC_INT);
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task_enable_irq(MEC1322_IRQ_KSC_INT);
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} else {
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task_disable_irq(MEC1322_IRQ_KSC_INT);
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}
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}
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void keyboard_raw_interrupt(void)
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{
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/* Clear interrupt status bits */
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MEC1322_KS_KSI_STATUS = 0xff;
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/* Wake keyboard scan task to handle interrupt */
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task_wake(TASK_ID_KEYSCAN);
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}
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DECLARE_IRQ(MEC1322_IRQ_KSC_INT, keyboard_raw_interrupt, 1);
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int keyboard_raw_is_input_low(int port, int id)
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{
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return (MEC1322_GPIO_CTL(port, id) & BIT(24)) == 0;
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}
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