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/* Copyright 2019 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.
*/
#include "adc.h"
#include "base_state.h"
#include "board.h"
#include "charge_manager.h"
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "timer.h"
#include "usb_pd.h"
#include "util.h"
#define CPRINTS(format, args...) cprints(CC_USB, format, ## args)
/* Krane base detection code */
/* Base detection and debouncing */
#define BASE_DETECT_DEBOUNCE_US (20 * MSEC)
/*
* If the base status is unclear (i.e. not within expected ranges, read
* the ADC value again every 500ms.
*/
#define BASE_DETECT_RETRY_US (500 * MSEC)
enum kukui_pogo_device_type {
DEVICE_TYPE_ERROR = -2,
DEVICE_TYPE_UNKNOWN = -1,
DEVICE_TYPE_DETACHED = 0,
#ifdef VARIANT_KUKUI_POGO_DOCK
DEVICE_TYPE_DOCK,
#endif
DEVICE_TYPE_KEYBOARD,
DEVICE_TYPE_COUNT,
};
struct {
int mv_low, mv_high;
} static const pogo_detect_table[] = {
[DEVICE_TYPE_DETACHED] = {2700, 3500}, /* 10K, NC, around 3.3V */
#ifdef VARIANT_KUKUI_POGO_DOCK
[DEVICE_TYPE_DOCK] = {141, 173}, /* 10K, 0.5K ohm */
#endif
[DEVICE_TYPE_KEYBOARD] = {270, 400}, /* 10K, 1K ohm */
};
BUILD_ASSERT(ARRAY_SIZE(pogo_detect_table) == DEVICE_TYPE_COUNT);
static uint64_t base_detect_debounce_time;
static enum kukui_pogo_device_type pogo_type;
int kukui_pogo_extpower_present(void)
{
#ifdef VARIANT_KUKUI_POGO_DOCK
return pogo_type == DEVICE_TYPE_DOCK &&
gpio_get_level(GPIO_POGO_VBUS_PRESENT);
#else
return 0;
#endif
}
static enum kukui_pogo_device_type get_device_type(int mv)
{
int i;
if (mv == ADC_READ_ERROR)
return DEVICE_TYPE_ERROR;
for (i = 0; i < DEVICE_TYPE_COUNT; i++) {
if (pogo_detect_table[i].mv_low <= mv &&
mv <= pogo_detect_table[i].mv_high)
return i;
}
return DEVICE_TYPE_UNKNOWN;
}
static void enable_charge(int enable)
{
#ifdef VARIANT_KUKUI_POGO_DOCK
if (enable) {
struct charge_port_info info = {
.voltage = 5000, .current = 1500};
/*
* Set supplier type to PD to have same priority as type c
* port.
*/
charge_manager_update_charge(
CHARGE_SUPPLIER_DEDICATED, CHARGE_PORT_POGO, &info);
} else {
charge_manager_update_charge(
CHARGE_SUPPLIER_DEDICATED, CHARGE_PORT_POGO, NULL);
}
pd_send_host_event(PD_EVENT_POWER_CHANGE);
#endif
}
static void enable_power_supply(int enable)
{
gpio_set_level(GPIO_EN_PP3300_POGO, enable);
}
static void base_detect_deferred(void);
DECLARE_DEFERRED(base_detect_deferred);
static void base_set_device_type(enum kukui_pogo_device_type device_type)
{
switch (device_type) {
case DEVICE_TYPE_ERROR:
case DEVICE_TYPE_UNKNOWN:
hook_call_deferred(&base_detect_deferred_data,
BASE_DETECT_RETRY_US);
break;
case DEVICE_TYPE_DETACHED:
enable_power_supply(0);
enable_charge(0);
base_set_state(0);
break;
#ifdef VARIANT_KUKUI_POGO_DOCK
case DEVICE_TYPE_DOCK:
enable_power_supply(0);
enable_charge(1);
base_set_state(1);
break;
#endif
case DEVICE_TYPE_KEYBOARD:
enable_charge(0);
enable_power_supply(1);
base_set_state(1);
break;
case DEVICE_TYPE_COUNT:
/* should not happen */
break;
}
}
static void base_detect_deferred(void)
{
uint64_t time_now = get_time().val;
int mv;
if (base_detect_debounce_time > time_now) {
hook_call_deferred(&base_detect_deferred_data,
base_detect_debounce_time - time_now);
return;
}
/*
* Disable interrupt first to prevent it triggered by value
* changed from 1 to disabled state(=0).
*/
gpio_disable_interrupt(GPIO_POGO_ADC_INT_L);
gpio_set_flags(GPIO_POGO_ADC_INT_L, GPIO_ANALOG);
mv = adc_read_channel(ADC_POGO_ADC_INT_L);
/* restore the pin function */
gpio_set_flags(GPIO_POGO_ADC_INT_L, GPIO_INT_BOTH);
gpio_enable_interrupt(GPIO_POGO_ADC_INT_L);
pogo_type = get_device_type(mv);
CPRINTS("POGO: adc=%d, type=%d", mv, pogo_type);
base_set_device_type(pogo_type);
}
void pogo_adc_interrupt(enum gpio_signal signal)
{
uint64_t time_now = get_time().val;
if (base_detect_debounce_time <= time_now) {
hook_call_deferred(&base_detect_deferred_data,
BASE_DETECT_DEBOUNCE_US);
}
base_detect_debounce_time = time_now + BASE_DETECT_DEBOUNCE_US;
}
static void pogo_chipset_init(void)
{
/* Enable pogo interrupt */
gpio_enable_interrupt(GPIO_POGO_ADC_INT_L);
hook_call_deferred(&base_detect_deferred_data, 0);
}
DECLARE_HOOK(HOOK_INIT, pogo_chipset_init, HOOK_PRIO_DEFAULT);
/* Called on AP S3 -> S5 transition */
static void pogo_chipset_shutdown(void)
{
/* Disable pogo interrupt */
gpio_disable_interrupt(GPIO_POGO_ADC_INT_L);
enable_power_supply(0);
}
DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, pogo_chipset_shutdown, HOOK_PRIO_DEFAULT);
void base_force_state(enum ec_set_base_state_cmd state)
{
if (state >= EC_SET_BASE_STATE_RESET) {
CPRINTS("BD forced reset");
pogo_chipset_init();
return;
}
gpio_disable_interrupt(GPIO_POGO_ADC_INT_L);
pogo_type = (state == 1 ? DEVICE_TYPE_KEYBOARD : DEVICE_TYPE_DETACHED);
base_set_device_type(state == EC_SET_BASE_STATE_ATTACH
? DEVICE_TYPE_KEYBOARD
: DEVICE_TYPE_DETACHED);
CPRINTS("BD forced %sconnected", state == EC_SET_BASE_STATE_ATTACH ?
"" : "dis");
}
#ifdef VARIANT_KUKUI_POGO_DOCK
static void board_pogo_charge_init(void)
{
int i;
/* Initialize all charge suppliers to 0 */
for (i = 0; i < CHARGE_SUPPLIER_COUNT; i++)
charge_manager_update_charge(i, CHARGE_PORT_POGO, NULL);
}
DECLARE_HOOK(HOOK_INIT, board_pogo_charge_init,
HOOK_PRIO_CHARGE_MANAGER_INIT + 1);
#endif
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