105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
/* Copyright 2017 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 MCHP MEC
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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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#include "tfdp_chip.h"
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/*
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* Using direct mode interrupt, do not enable
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* GIRQ bit in aggregator block enable register.
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*/
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void keyboard_raw_init(void)
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{
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/* clear key scan PCR sleep enable */
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MCHP_PCR_SLP_DIS_DEV(MCHP_PCR_KEYSCAN);
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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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MCHP_INT_ENABLE(MCHP_KS_GIRQ) = MCHP_KS_GIRQ_BIT;
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MCHP_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(MCHP_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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MCHP_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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MCHP_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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MCHP_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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MCHP_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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MCHP_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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uint8_t b1, b2;
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b1 = MCHP_KS_KSI_INPUT;
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b2 = (b1 & 0xff) ^ 0xff;
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/* Invert it so 0=not pressed, 1=pressed */
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/* return (MCHP_KS_KSI_INPUT & 0xff) ^ 0xff; */
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return b2;
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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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MCHP_INT_SOURCE(MCHP_KS_GIRQ) = MCHP_KS_GIRQ_BIT;
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task_clear_pending_irq(MCHP_IRQ_KSC_INT);
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task_enable_irq(MCHP_IRQ_KSC_INT);
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} else {
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task_disable_irq(MCHP_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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MCHP_KS_KSI_STATUS = 0xff;
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MCHP_INT_SOURCE(MCHP_KS_GIRQ) = MCHP_KS_GIRQ_BIT;
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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(MCHP_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 (MCHP_GPIO_CTL(port, id) & BIT(24)) == 0;
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}
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