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/* Copyright 2021 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.
*/
/* Input devices using Matrix Keyboard Protocol [MKBP] events for Chrome EC */
#include "base_state.h"
#include "button.h"
#include "console.h"
#include "hooks.h"
#include "host_command.h"
#include "keyboard_mkbp.h"
#include "keyboard_scan.h"
#include "lid_switch.h"
#include "mkbp_event.h"
#include "mkbp_fifo.h"
#include "mkbp_input_devices.h"
#include "power_button.h"
#include "tablet_mode.h"
#include "util.h"
#define CPRINTS(format, args...) cprints(CC_KEYBOARD, format, ## args)
/* Buttons and switch state. */
static uint32_t mkbp_button_state;
static uint32_t mkbp_switch_state;
static bool mkbp_init_done;
uint32_t mkbp_get_switch_state(void)
{
return mkbp_switch_state;
};
uint32_t mkbp_get_button_state(void)
{
return mkbp_button_state;
};
void mkbp_button_update(enum keyboard_button_type button, int is_pressed)
{
switch (button) {
case KEYBOARD_BUTTON_POWER:
mkbp_button_state &= ~BIT(EC_MKBP_POWER_BUTTON);
mkbp_button_state |= (is_pressed << EC_MKBP_POWER_BUTTON);
break;
case KEYBOARD_BUTTON_VOLUME_UP:
mkbp_button_state &= ~BIT(EC_MKBP_VOL_UP);
mkbp_button_state |= (is_pressed << EC_MKBP_VOL_UP);
break;
case KEYBOARD_BUTTON_VOLUME_DOWN:
mkbp_button_state &= ~BIT(EC_MKBP_VOL_DOWN);
mkbp_button_state |= (is_pressed << EC_MKBP_VOL_DOWN);
break;
case KEYBOARD_BUTTON_RECOVERY:
mkbp_button_state &= ~BIT(EC_MKBP_RECOVERY);
mkbp_button_state |= (is_pressed << EC_MKBP_RECOVERY);
break;
default:
/* ignored. */
return;
}
CPRINTS("mkbp buttons: %x", mkbp_button_state);
mkbp_fifo_add(EC_MKBP_EVENT_BUTTON,
(const uint8_t *)&mkbp_button_state);
};
void mkbp_update_switches(uint32_t sw, int state)
{
mkbp_switch_state &= ~BIT(sw);
mkbp_switch_state |= (!!state << sw);
CPRINTS("mkbp switches: %x", mkbp_switch_state);
/*
* Only inform AP mkbp changes when all switches initialized, in case
* of the middle states causing the weird behaviour in the AP side,
* especially when sysjumped while AP up.
*/
if (mkbp_init_done)
mkbp_fifo_add(EC_MKBP_EVENT_SWITCH,
(const uint8_t *)&mkbp_switch_state);
}
/*****************************************************************************/
/* Hooks */
#ifdef CONFIG_POWER_BUTTON
/**
* Handle power button changing state.
*/
static void keyboard_power_button(void)
{
mkbp_button_update(KEYBOARD_BUTTON_POWER,
power_button_is_pressed());
}
DECLARE_HOOK(HOOK_POWER_BUTTON_CHANGE, keyboard_power_button,
HOOK_PRIO_DEFAULT);
#endif /* defined(CONFIG_POWER_BUTTON) */
#ifdef CONFIG_LID_SWITCH
/**
* Handle lid changing state.
*/
static void mkbp_lid_change(void)
{
mkbp_update_switches(EC_MKBP_LID_OPEN, lid_is_open());
}
DECLARE_HOOK(HOOK_LID_CHANGE, mkbp_lid_change, HOOK_PRIO_LAST);
DECLARE_HOOK(HOOK_INIT, mkbp_lid_change, HOOK_PRIO_INIT_LID+1);
#endif
#ifdef CONFIG_TABLET_MODE_SWITCH
static void mkbp_tablet_mode_change(void)
{
mkbp_update_switches(EC_MKBP_TABLET_MODE, tablet_get_mode());
}
DECLARE_HOOK(HOOK_TABLET_MODE_CHANGE, mkbp_tablet_mode_change, HOOK_PRIO_LAST);
DECLARE_HOOK(HOOK_INIT, mkbp_tablet_mode_change, HOOK_PRIO_INIT_LID+1);
#endif
#ifdef CONFIG_BASE_ATTACHED_SWITCH
static void mkbp_base_attached_change(void)
{
mkbp_update_switches(EC_MKBP_BASE_ATTACHED, base_get_state());
}
DECLARE_HOOK(HOOK_BASE_ATTACHED_CHANGE, mkbp_base_attached_change,
HOOK_PRIO_LAST);
DECLARE_HOOK(HOOK_INIT, mkbp_base_attached_change, HOOK_PRIO_INIT_LID+1);
#endif
static void mkbp_report_switch_on_init(void)
{
/* All switches initialized, report switch state to AP */
mkbp_init_done = true;
mkbp_fifo_add(EC_MKBP_EVENT_SWITCH,
(const uint8_t *)&mkbp_switch_state);
}
DECLARE_HOOK(HOOK_INIT, mkbp_report_switch_on_init, HOOK_PRIO_LAST);
#ifdef CONFIG_EMULATED_SYSRQ
void host_send_sysrq(uint8_t key)
{
uint32_t value = key;
mkbp_fifo_add(EC_MKBP_EVENT_SYSRQ, (const uint8_t *)&value);
}
#endif
/*****************************************************************************/
/* Events */
static int mkbp_button_get_next_event(uint8_t *out)
{
return mkbp_fifo_get_next_event(out, EC_MKBP_EVENT_BUTTON);
}
DECLARE_EVENT_SOURCE(EC_MKBP_EVENT_BUTTON, mkbp_button_get_next_event);
static int switch_get_next_event(uint8_t *out)
{
return mkbp_fifo_get_next_event(out, EC_MKBP_EVENT_SWITCH);
}
DECLARE_EVENT_SOURCE(EC_MKBP_EVENT_SWITCH, switch_get_next_event);
#ifdef CONFIG_EMULATED_SYSRQ
static int sysrq_get_next_event(uint8_t *out)
{
return mkbp_fifo_get_next_event(out, EC_MKBP_EVENT_SYSRQ);
}
DECLARE_EVENT_SOURCE(EC_MKBP_EVENT_SYSRQ, sysrq_get_next_event);
#endif
/************************ Keyboard press simulation ************************/
#ifndef HAS_TASK_KEYSCAN
/* Keys simulated-pressed */
static uint8_t __bss_slow simulated_key[KEYBOARD_COLS_MAX];
uint8_t keyboard_cols = KEYBOARD_COLS_MAX;
/* For boards without a keyscan task, try and simulate keyboard presses. */
static void simulate_key(int row, int col, int pressed)
{
if ((simulated_key[col] & BIT(row)) == ((pressed ? 1 : 0) << row))
return; /* No change */
simulated_key[col] &= ~BIT(row);
if (pressed)
simulated_key[col] |= BIT(row);
mkbp_fifo_add((uint8_t)EC_MKBP_EVENT_KEY_MATRIX, simulated_key);
}
static int command_mkbp_keyboard_press(int argc, char **argv)
{
if (argc == 1) {
int i, j;
ccputs("Simulated keys:\n");
for (i = 0; i < keyboard_cols; ++i) {
if (simulated_key[i] == 0)
continue;
for (j = 0; j < KEYBOARD_ROWS; ++j)
if (simulated_key[i] & BIT(j))
ccprintf("\t%d %d\n", i, j);
}
} else if (argc == 3 || argc == 4) {
int r, c, p;
char *e;
c = strtoi(argv[1], &e, 0);
if (*e || c < 0 || c >= keyboard_cols)
return EC_ERROR_PARAM1;
r = strtoi(argv[2], &e, 0);
if (*e || r < 0 || r >= KEYBOARD_ROWS)
return EC_ERROR_PARAM2;
if (argc == 3) {
/* Simulate a press and release */
simulate_key(r, c, 1);
simulate_key(r, c, 0);
} else {
p = strtoi(argv[3], &e, 0);
if (*e || p < 0 || p > 1)
return EC_ERROR_PARAM3;
simulate_key(r, c, p);
}
}
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(kbpress, command_mkbp_keyboard_press,
"[col row [0 | 1]]",
"Simulate keypress");
#endif /* !defined(HAS_TASK_KEYSCAN) */
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