264 lines
6.7 KiB
C
264 lines
6.7 KiB
C
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/* Copyright 2014 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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/* Host command module for PD MCU */
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#include "charge_state.h"
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#include "common.h"
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#include "console.h"
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#include "gpio.h"
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#include "host_command.h"
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#include "lightbar.h"
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#include "panic.h"
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#include "system.h"
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#include "task.h"
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#include "tcpm.h"
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#include "timer.h"
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#include "usb_pd.h"
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#include "usb_pd_tcpm.h"
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#include "util.h"
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#define CPRINTS(format, args...) cprints(CC_PD_HOST_CMD, format, ## args)
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#define TASK_EVENT_EXCHANGE_PD_STATUS TASK_EVENT_CUSTOM_BIT(0)
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#define TASK_EVENT_HIBERNATING TASK_EVENT_CUSTOM_BIT(1)
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/* Define local option for if we are a TCPM with an off chip TCPC */
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#if defined(CONFIG_USB_POWER_DELIVERY) && !defined(CONFIG_USB_PD_TCPM_STUB)
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#define USB_TCPM_WITH_OFF_CHIP_TCPC
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#endif
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#ifdef CONFIG_HOSTCMD_PD_CHG_CTRL
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/* By default allow 5V charging only for the dead battery case */
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static enum pd_charge_state charge_state = PD_CHARGE_5V;
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#define CHARGE_PORT_UNINITIALIZED -2
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static int charge_port = CHARGE_PORT_UNINITIALIZED;
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int pd_get_active_charge_port(void)
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{
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return charge_port;
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}
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#endif /* CONFIG_HOSTCMD_PD_CHG_CTRL */
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void host_command_pd_send_status(enum pd_charge_state new_chg_state)
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{
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#ifdef CONFIG_HOSTCMD_PD_CHG_CTRL
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/* Update PD MCU charge state if necessary */
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if (new_chg_state != PD_CHARGE_NO_CHANGE)
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charge_state = new_chg_state;
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#endif
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/* Wake PD HC task to send status */
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task_set_event(TASK_ID_PDCMD, TASK_EVENT_EXCHANGE_PD_STATUS, 0);
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}
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void host_command_pd_request_hibernate(void)
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{
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task_set_event(TASK_ID_PDCMD, TASK_EVENT_HIBERNATING, 0);
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}
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#ifdef CONFIG_HOSTCMD_PD
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static int pd_send_host_command(struct ec_params_pd_status *ec_status,
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struct ec_response_pd_status *pd_status)
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{
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return pd_host_command(EC_CMD_PD_EXCHANGE_STATUS,
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EC_VER_PD_EXCHANGE_STATUS, ec_status,
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sizeof(struct ec_params_pd_status), pd_status,
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sizeof(struct ec_response_pd_status));
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}
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static void pd_exchange_update_ec_status(struct ec_params_pd_status *ec_status,
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uint32_t ec_state)
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{
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/* Send PD charge state and battery state of charge */
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#ifdef CONFIG_HOSTCMD_PD_CHG_CTRL
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ec_status->charge_state = charge_state;
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#endif
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if (charge_get_flags() & CHARGE_FLAG_BATT_RESPONSIVE)
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ec_status->batt_soc = charge_get_percent();
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else
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ec_status->batt_soc = -1;
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ec_status->status = ec_state;
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}
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#ifdef CONFIG_HOSTCMD_PD_PANIC
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static void pd_check_panic(struct ec_response_pd_status *pd_status)
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{
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static int pd_in_rw;
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/*
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* Check if PD MCU is in RW. If PD MCU was in RW, is now in RO,
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* AND it did not sysjump to RO, then it must have crashed, and
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* therefore we should panic as well.
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*/
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if (pd_status->status & PD_STATUS_IN_RW) {
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pd_in_rw = 1;
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} else if (pd_in_rw &&
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!(pd_status->status & PD_STATUS_JUMPED_TO_IMAGE)) {
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panic_printf("PD crash");
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software_panic(PANIC_SW_PD_CRASH, 0);
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}
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}
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#endif /* CONFIG_HOSTCMD_PD_PANIC */
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#ifdef CONFIG_HOSTCMD_PD_CHG_CTRL
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static void pd_check_chg_status(struct ec_response_pd_status *pd_status)
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{
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int rv;
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#ifdef HAS_TASK_LIGHTBAR
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/*
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* If charge port has changed, and it was initialized, then show
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* battery status on lightbar.
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*/
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if (pd_status->active_charge_port != charge_port) {
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if (charge_port != CHARGE_PORT_UNINITIALIZED) {
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charge_port = pd_status->active_charge_port;
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lightbar_sequence(LIGHTBAR_TAP);
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} else {
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charge_port = pd_status->active_charge_port;
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}
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}
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#else
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/* Store the active charge port */
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charge_port = pd_status->active_charge_port;
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#endif
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/* Set input current limit */
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rv = charge_set_input_current_limit(MAX(pd_status->curr_lim_ma,
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CONFIG_CHARGER_INPUT_CURRENT), 0);
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if (rv < 0)
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CPRINTS("Failed to set input curr limit from PD MCU");
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}
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#endif /* CONFIG_HOSTCMD_PD_CHG_CTRL */
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#endif /* CONFIG_HOSTCMD_PD */
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#ifdef USB_TCPM_WITH_OFF_CHIP_TCPC
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static void pd_service_tcpc_ports(uint16_t port_status)
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{
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int i;
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for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; i++) {
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if ((port_status & (PD_STATUS_TCPC_ALERT_0 << i)) &&
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pd_is_port_enabled(i))
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tcpc_alert(i);
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}
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}
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static int pd_get_alert(void)
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{
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#ifdef CONFIG_HOSTCMD_PD
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return !gpio_get_level(GPIO_PD_MCU_INT);
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#else
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return !!tcpc_get_alert_status();
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#endif
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}
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#endif /* USB_TCPM_WITH_OFF_CHIP_TCPC */
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static void pd_exchange_status(uint32_t ec_state)
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{
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#ifdef USB_TCPM_WITH_OFF_CHIP_TCPC
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int first_exchange = 1;
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#endif
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#ifdef CONFIG_HOSTCMD_PD
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struct ec_params_pd_status ec_status;
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struct ec_response_pd_status pd_status;
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int rv;
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pd_exchange_update_ec_status(&ec_status, ec_state);
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#endif
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#ifdef USB_TCPM_WITH_OFF_CHIP_TCPC
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/* Loop until the alert gpio is not active */
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do {
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#endif
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#ifdef CONFIG_HOSTCMD_PD
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rv = pd_send_host_command(&ec_status, &pd_status);
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if (rv < 0) {
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CPRINTS("Host command to PD MCU failed: %d", rv);
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return;
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}
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#ifdef CONFIG_HOSTCMD_PD_PANIC
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pd_check_panic(&pd_status);
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#endif
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#ifdef CONFIG_HOSTCMD_PD_CHG_CTRL
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pd_check_chg_status(&pd_status);
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#endif
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#endif /* CONFIG_HOSTCMD_PD */
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#ifdef USB_TCPM_WITH_OFF_CHIP_TCPC
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#ifdef CONFIG_HOSTCMD_PD
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pd_service_tcpc_ports(pd_status.status);
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#else
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pd_service_tcpc_ports(tcpc_get_alert_status());
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#endif
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if (!first_exchange)
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/* Delay to prevent task starvation */
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usleep(5*MSEC);
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first_exchange = 0;
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} while (pd_get_alert());
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#endif /* USB_TCPM_WITH_OFF_CHIP_TCPC */
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}
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void pd_command_task(void *u)
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{
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/* On startup exchange status with the PD */
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pd_exchange_status(0);
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while (1) {
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/* Wait for the next command event */
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int evt = task_wait_event(-1);
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uint32_t ec_state = 0;
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if (evt & TASK_EVENT_HIBERNATING)
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ec_state = EC_STATUS_HIBERNATING;
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/* Process event to send status to PD */
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if ((evt & TASK_EVENT_EXCHANGE_PD_STATUS) ||
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(evt & TASK_EVENT_HIBERNATING))
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pd_exchange_status(ec_state);
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}
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}
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#if defined(USB_TCPM_WITH_OFF_CHIP_TCPC) && defined(CONFIG_HOSTCMD_EVENTS)
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/*
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* PD host event status for host command
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* Note: this variable must be aligned on 4-byte boundary because we pass the
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* address to atomic_ functions which use assembly to access them.
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*/
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static uint32_t pd_host_event_status __aligned(4);
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static enum ec_status
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hc_pd_host_event_status(struct host_cmd_handler_args *args)
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{
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struct ec_response_host_event_status *r = args->response;
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/* Read and clear the host event status to return to AP */
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r->status = atomic_read_clear(&pd_host_event_status);
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args->response_size = sizeof(*r);
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return EC_RES_SUCCESS;
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}
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DECLARE_HOST_COMMAND(EC_CMD_PD_HOST_EVENT_STATUS, hc_pd_host_event_status,
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EC_VER_MASK(0));
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/* Send host event up to AP */
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void pd_send_host_event(int mask)
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{
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/* mask must be set */
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if (!mask)
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return;
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atomic_or(&pd_host_event_status, mask);
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/* interrupt the AP */
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host_set_single_event(EC_HOST_EVENT_PD_MCU);
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}
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#endif
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