1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/* Copyright (c) 2014 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.
*/
/* Functions needed by keyboard scanner module for Chrome EC */
#include "common.h"
#include "keyboard_raw.h"
#include "keyboard_scan.h"
#include "clock.h"
#include "registers.h"
#include "task.h"
/**
* Initialize the raw keyboard interface.
*/
void keyboard_raw_init(void)
{
/* Enable clock for KBS peripheral */
clock_enable_peripheral(CGC_OFFSET_KBS, CGC_KBS_MASK,
CGC_MODE_RUN | CGC_MODE_SLEEP);
/* Ensure top-level interrupt is disabled */
keyboard_raw_enable_interrupt(0);
/* pull-up KBSIN 0-7 internally */
NPCX_KBSINPU = 0xFF;
/* Disable automatic scan mode */
CLEAR_BIT(NPCX_KBSCTL, NPCX_KBSMODE);
/* Disable automatic interrupt enable */
CLEAR_BIT(NPCX_KBSCTL, NPCX_KBSIEN);
/* Disable increment enable */
CLEAR_BIT(NPCX_KBSCTL, NPCX_KBSINC);
/* Set KBSOUT to zero to detect key-press */
NPCX_KBSOUT0 = 0x00;
NPCX_KBSOUT1 = 0x00;
/*
* Enable interrupts for the inputs. The top-level interrupt is still
* masked off, so this won't trigger interrupts yet.
*/
/* Clear pending input sources used by scanner */
NPCX_WKPCL(MIWU_TABLE_WKKEY, MIWU_GROUP_WKKEY) = 0xFF;
/* Enable Wake-up Button */
NPCX_WKEN(MIWU_TABLE_WKKEY, MIWU_GROUP_WKKEY) = 0xFF;
/* Select high to low transition (falling edge) */
NPCX_WKEDG(MIWU_TABLE_WKKEY, MIWU_GROUP_WKKEY) = 0xFF;
/* Enable interrupt of WK KBS */
keyboard_raw_enable_interrupt(1);
}
/**
* Finish initialization after task scheduling has started.
*/
void keyboard_raw_task_start(void)
{
/* Enable MIWU to trigger KBS interrupt */
task_enable_irq(NPCX_IRQ_KSI_WKINTC_1);
}
/**
* Drive the specified column low.
*/
test_mockable void keyboard_raw_drive_column(int col)
{
/*
* Nuvoton Keyboard Scan IP supports 18x8 Matrix
* It also support automatic scan functionality
*/
uint32_t mask;
/* Drive all lines to high */
if (col == KEYBOARD_COLUMN_NONE)
mask = KB_COL_MASK;
/* Set KBSOUT to zero to detect key-press */
else if (col == KEYBOARD_COLUMN_ALL)
mask = 0;
/* Drive one line for detection */
else
mask = ((~(1 << col)) & KB_COL_MASK);
/* Set KBSOUT */
NPCX_KBSOUT0 = (mask & 0xFFFF);
NPCX_KBSOUT1 = ((mask >> 16) & 0x03);
}
/**
* Read raw row state.
* Bits are 1 if signal is present, 0 if not present.
*/
test_mockable int keyboard_raw_read_rows(void)
{
/* Bits are active-low, so invert returned levels */
return (~NPCX_KBSIN) & KB_ROW_MASK;
}
/**
* Enable or disable keyboard interrupts.
*/
void keyboard_raw_enable_interrupt(int enable)
{
if (enable)
task_enable_irq(NPCX_IRQ_KSI_WKINTC_1);
else
task_disable_irq(NPCX_IRQ_KSI_WKINTC_1);
}
/*
* Interrupt handler for the entire GPIO bank of keyboard rows.
*/
void keyboard_raw_interrupt(void)
{
/* Clear pending input sources used by scanner */
NPCX_WKPCL(MIWU_TABLE_WKKEY, MIWU_GROUP_WKKEY) = 0xFF;
/* Wake the scan task */
task_wake(TASK_ID_KEYSCAN);
}
DECLARE_IRQ(NPCX_IRQ_KSI_WKINTC_1, keyboard_raw_interrupt, 3);
|
