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/* 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.
*/
/* Host command module for PD MCU */
#include "charge_state.h"
#include "common.h"
#include "console.h"
#include "gpio.h"
#include "host_command.h"
#include "lightbar.h"
#include "panic.h"
#include "system.h"
#include "task.h"
#include "tcpm.h"
#include "timer.h"
#include "usb_pd.h"
#include "usb_pd_tcpm.h"
#include "util.h"
#define CPRINTS(format, args...) cprints(CC_PD_HOST_CMD, format, ## args)
#define TASK_EVENT_EXCHANGE_PD_STATUS TASK_EVENT_CUSTOM(1)
#define TASK_EVENT_HIBERNATING TASK_EVENT_CUSTOM(2)
/* Define local option for if we are a TCPM with an off chip TCPC */
#if defined(CONFIG_USB_POWER_DELIVERY) && !defined(CONFIG_USB_PD_TCPM_STUB)
#define USB_TCPM_WITH_OFF_CHIP_TCPC
#endif
#ifdef CONFIG_HOSTCMD_PD_CHG_CTRL
/* By default allow 5V charging only for the dead battery case */
static enum pd_charge_state charge_state = PD_CHARGE_5V;
#define CHARGE_PORT_UNINITIALIZED -2
static int charge_port = CHARGE_PORT_UNINITIALIZED;
int pd_get_active_charge_port(void)
{
return charge_port;
}
#endif /* CONFIG_HOSTCMD_PD_CHG_CTRL */
void host_command_pd_send_status(enum pd_charge_state new_chg_state)
{
#ifdef CONFIG_HOSTCMD_PD_CHG_CTRL
/* Update PD MCU charge state if necessary */
if (new_chg_state != PD_CHARGE_NO_CHANGE)
charge_state = new_chg_state;
#endif
/* Wake PD HC task to send status */
task_set_event(TASK_ID_PDCMD, TASK_EVENT_EXCHANGE_PD_STATUS, 0);
}
void host_command_pd_request_hibernate(void)
{
task_set_event(TASK_ID_PDCMD, TASK_EVENT_HIBERNATING, 0);
}
#ifdef CONFIG_HOSTCMD_PD
static int pd_send_host_command(struct ec_params_pd_status *ec_status,
struct ec_response_pd_status *pd_status)
{
return pd_host_command(EC_CMD_PD_EXCHANGE_STATUS,
EC_VER_PD_EXCHANGE_STATUS, ec_status,
sizeof(struct ec_params_pd_status), pd_status,
sizeof(struct ec_response_pd_status));
}
static void pd_exchange_update_ec_status(struct ec_params_pd_status *ec_status,
uint32_t ec_state)
{
/* Send PD charge state and battery state of charge */
#ifdef CONFIG_HOSTCMD_PD_CHG_CTRL
ec_status->charge_state = charge_state;
#endif
if (charge_get_flags() & CHARGE_FLAG_BATT_RESPONSIVE)
ec_status->batt_soc = charge_get_percent();
else
ec_status->batt_soc = -1;
ec_status->status = ec_state;
}
#ifdef CONFIG_HOSTCMD_PD_PANIC
static void pd_check_panic(struct ec_response_pd_status *pd_status)
{
static int pd_in_rw;
/*
* Check if PD MCU is in RW. If PD MCU was in RW, is now in RO,
* AND it did not sysjump to RO, then it must have crashed, and
* therefore we should panic as well.
*/
if (pd_status->status & PD_STATUS_IN_RW) {
pd_in_rw = 1;
} else if (pd_in_rw &&
!(pd_status->status & PD_STATUS_JUMPED_TO_IMAGE)) {
panic_printf("PD crash");
software_panic(PANIC_SW_PD_CRASH, 0);
}
}
#endif /* CONFIG_HOSTCMD_PD_PANIC */
#ifdef CONFIG_HOSTCMD_PD_CHG_CTRL
static void pd_check_chg_status(struct ec_response_pd_status *pd_status)
{
int rv;
#ifdef HAS_TASK_LIGHTBAR
/*
* If charge port has changed, and it was initialized, then show
* battery status on lightbar.
*/
if (pd_status->active_charge_port != charge_port) {
if (charge_port != CHARGE_PORT_UNINITIALIZED) {
charge_port = pd_status->active_charge_port;
lightbar_sequence(LIGHTBAR_TAP);
} else {
charge_port = pd_status->active_charge_port;
}
}
#else
/* Store the active charge port */
charge_port = pd_status->active_charge_port;
#endif
/* Set input current limit */
rv = charge_set_input_current_limit(MAX(pd_status->curr_lim_ma,
CONFIG_CHARGER_INPUT_CURRENT), 0);
if (rv < 0)
CPRINTS("Failed to set input curr limit from PD MCU");
}
#endif /* CONFIG_HOSTCMD_PD_CHG_CTRL */
#endif /* CONFIG_HOSTCMD_PD */
#ifdef USB_TCPM_WITH_OFF_CHIP_TCPC
static void pd_service_tcpc_ports(uint16_t port_status)
{
int i;
for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; i++) {
if ((port_status & (PD_STATUS_TCPC_ALERT_0 << i)) &&
pd_is_port_enabled(i))
tcpc_alert(i);
}
}
static int pd_get_alert(void)
{
#ifdef CONFIG_HOSTCMD_PD
return !gpio_get_level(GPIO_PD_MCU_INT);
#else
return !!tcpc_get_alert_status();
#endif
}
#endif /* USB_TCPM_WITH_OFF_CHIP_TCPC */
static void pd_exchange_status(uint32_t ec_state)
{
#ifdef USB_TCPM_WITH_OFF_CHIP_TCPC
int first_exchange = 1;
#endif
#ifdef CONFIG_HOSTCMD_PD
struct ec_params_pd_status ec_status;
struct ec_response_pd_status pd_status;
int rv;
pd_exchange_update_ec_status(&ec_status, ec_state);
#endif
#ifdef USB_TCPM_WITH_OFF_CHIP_TCPC
/* Loop until the alert gpio is not active */
do {
#endif
#ifdef CONFIG_HOSTCMD_PD
rv = pd_send_host_command(&ec_status, &pd_status);
if (rv < 0) {
CPRINTS("Host command to PD MCU failed: %d", rv);
return;
}
#ifdef CONFIG_HOSTCMD_PD_PANIC
pd_check_panic(&pd_status);
#endif
#ifdef CONFIG_HOSTCMD_PD_CHG_CTRL
pd_check_chg_status(&pd_status);
#endif
#endif /* CONFIG_HOSTCMD_PD */
#ifdef USB_TCPM_WITH_OFF_CHIP_TCPC
#ifdef CONFIG_HOSTCMD_PD
pd_service_tcpc_ports(pd_status.status);
#else
pd_service_tcpc_ports(tcpc_get_alert_status());
#endif
if (!first_exchange)
/* Delay to prevent task starvation */
usleep(5*MSEC);
first_exchange = 0;
} while (pd_get_alert());
#endif /* USB_TCPM_WITH_OFF_CHIP_TCPC */
}
void pd_command_task(void *u)
{
/* On startup exchange status with the PD */
pd_exchange_status(0);
while (1) {
/* Wait for the next command event */
int evt = task_wait_event(-1);
uint32_t ec_state = 0;
if (evt & TASK_EVENT_HIBERNATING)
ec_state = EC_STATUS_HIBERNATING;
/* Process event to send status to PD */
if ((evt & TASK_EVENT_EXCHANGE_PD_STATUS) ||
(evt & TASK_EVENT_HIBERNATING))
pd_exchange_status(ec_state);
}
}
#if defined(USB_TCPM_WITH_OFF_CHIP_TCPC) && defined(CONFIG_HOSTCMD_EVENTS)
/*
* PD host event status for host command
* Note: this variable must be aligned on 4-byte boundary because we pass the
* address to atomic_ functions which use assembly to access them.
*/
static uint32_t pd_host_event_status __aligned(4);
static int hc_pd_host_event_status(struct host_cmd_handler_args *args)
{
struct ec_response_host_event_status *r = args->response;
/* Read and clear the host event status to return to AP */
r->status = atomic_read_clear(&pd_host_event_status);
args->response_size = sizeof(*r);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_PD_HOST_EVENT_STATUS, hc_pd_host_event_status,
EC_VER_MASK(0));
/* Send host event up to AP */
void pd_send_host_event(int mask)
{
/* mask must be set */
if (!mask)
return;
atomic_or(&pd_host_event_status, mask);
/* interrupt the AP */
host_set_single_event(EC_HOST_EVENT_PD_MCU);
}
#endif
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