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/* Copyright 2017 The ChromiumOS Authors
* 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 MCHP MEC
*/
#include "gpio.h"
#include "keyboard_config.h"
#include "keyboard_raw.h"
#include "keyboard_scan.h"
#include "registers.h"
#include "task.h"
#include "util.h"
#include "tfdp_chip.h"
/*
* Using direct mode interrupt, do not enable
* GIRQ bit in aggregator block enable register.
*/
void keyboard_raw_init(void)
{
/* clear key scan PCR sleep enable */
MCHP_PCR_SLP_DIS_DEV(MCHP_PCR_KEYSCAN);
keyboard_raw_enable_interrupt(0);
gpio_config_module(MODULE_KEYBOARD_SCAN, 1);
/* Enable keyboard scan interrupt */
MCHP_INT_ENABLE(MCHP_KS_GIRQ) = MCHP_KS_GIRQ_BIT;
MCHP_KS_KSI_INT_EN = 0xff;
}
void keyboard_raw_task_start(void)
{
task_enable_irq(MCHP_IRQ_KSC_INT);
}
test_mockable void keyboard_raw_drive_column(int out)
{
if (out == KEYBOARD_COLUMN_ALL) {
MCHP_KS_KSO_SEL = BIT(5); /* KSEN=0, KSALL=1 */
#ifdef CONFIG_KEYBOARD_COL2_INVERTED
gpio_set_level(GPIO_KBD_KSO2, 1);
#endif
} else if (out == KEYBOARD_COLUMN_NONE) {
MCHP_KS_KSO_SEL = BIT(6); /* KSEN=1 */
#ifdef CONFIG_KEYBOARD_COL2_INVERTED
gpio_set_level(GPIO_KBD_KSO2, 0);
#endif
} else {
#ifdef CONFIG_KEYBOARD_COL2_INVERTED
if (out == 2) {
MCHP_KS_KSO_SEL = BIT(6); /* KSEN=1 */
gpio_set_level(GPIO_KBD_KSO2, 1);
} else {
MCHP_KS_KSO_SEL = out + CONFIG_KEYBOARD_KSO_BASE;
gpio_set_level(GPIO_KBD_KSO2, 0);
}
#else
MCHP_KS_KSO_SEL = out + CONFIG_KEYBOARD_KSO_BASE;
#endif
}
}
test_mockable int keyboard_raw_read_rows(void)
{
uint8_t b1, b2;
b1 = MCHP_KS_KSI_INPUT;
b2 = (b1 & 0xff) ^ 0xff;
/* Invert it so 0=not pressed, 1=pressed */
/* return (MCHP_KS_KSI_INPUT & 0xff) ^ 0xff; */
return b2;
}
void keyboard_raw_enable_interrupt(int enable)
{
if (enable) {
MCHP_INT_SOURCE(MCHP_KS_GIRQ) = MCHP_KS_GIRQ_BIT;
task_clear_pending_irq(MCHP_IRQ_KSC_INT);
task_enable_irq(MCHP_IRQ_KSC_INT);
} else {
task_disable_irq(MCHP_IRQ_KSC_INT);
}
}
static void keyboard_raw_interrupt(void)
{
/* Clear interrupt status bits */
MCHP_KS_KSI_STATUS = 0xff;
MCHP_INT_SOURCE(MCHP_KS_GIRQ) = MCHP_KS_GIRQ_BIT;
/* Wake keyboard scan task to handle interrupt */
task_wake(TASK_ID_KEYSCAN);
}
DECLARE_IRQ(MCHP_IRQ_KSC_INT, keyboard_raw_interrupt, 1);
int keyboard_raw_is_input_low(int port, int id)
{
return (MCHP_GPIO_CTL(port, id) & BIT(24)) == 0;
}
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