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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.
*/
#include <stdbool.h>
#include <stdint.h>
#include "compile_time_macros.h"
#include "console.h"
#include "hooks.h"
#include "timer.h"
#include "usb_common.h"
#include "usb_mux.h"
#include "usb_tc_sm.h"
#ifdef CONFIG_COMMON_RUNTIME
#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
#else
#define CPRINTS(format, args...)
#define CPRINTF(format, args...)
#endif
/*
* Retimer firmware update is initiated by AP.
* The operations requested by AP are:
* 0 - USB_RETIMER_FW_UPDATE_QUERY_PORT
* 1 - USB_RETIMER_FW_UPDATE_SUSPEND_PD
* 2 - USB_RETIMER_FW_UPDATE_RESUME_PD
* 3 - USB_RETIMER_FW_UPDATE_GET_MUX
* 4 - USB_RETIMER_FW_UPDATE_SET_USB
* 5 - USB_RETIMER_FW_UPDATE_SET_SAFE
* 6 - USB_RETIMER_FW_UPDATE_SET_TBT
* 7 - USB_RETIMER_FW_UPDATE_DISCONNECT
*
* Operation 0 is processed immediately.
* Operations 1 to 7 are deferred and processed inside tc_run().
* Operations 1/2/3 can be processed any time; while 4/5/6/7 have
* to be processed when PD task is suspended.
* Two TC flags are created for this situation.
* If Op 1/2/3 is received, TC_FLAGS_USB_RETIMER_FW_UPDATE_RUN
* is set, PD task will be waken up and process it.
* If 4/5/6/7 is received, TC_FLAGS_USB_RETIMER_FW_UPDATE_LTD_RUN is
* set, PD task should be in suspended mode and process it.
*
*/
#define SUSPEND 1
#define RESUME 0
/* Track current port AP requested to update retimer firmware */
static int cur_port;
static int last_op; /* Operation received from AP via ACPI_WRITE */
/* Operation result returned to ACPI_READ */
static int last_result;
int usb_retimer_fw_update_get_result(void)
{
int result = 0;
switch (last_op) {
case USB_RETIMER_FW_UPDATE_SUSPEND_PD:
if (last_result == USB_RETIMER_FW_UPDATE_ERR) {
result = last_result;
break;
}
/* fall through */
case USB_RETIMER_FW_UPDATE_RESUME_PD:
result = pd_is_port_enabled(cur_port);
break;
case USB_RETIMER_FW_UPDATE_QUERY_PORT:
result = usb_mux_retimer_fw_update_port_info();
break;
case USB_RETIMER_FW_UPDATE_GET_MUX:
case USB_RETIMER_FW_UPDATE_SET_USB:
case USB_RETIMER_FW_UPDATE_SET_SAFE:
case USB_RETIMER_FW_UPDATE_SET_TBT:
case USB_RETIMER_FW_UPDATE_DISCONNECT:
result = last_result;
break;
default:
break;
}
return result;
}
static void deferred_pd_suspend(void)
{
pd_set_suspend(cur_port, SUSPEND);
}
DECLARE_DEFERRED(deferred_pd_suspend);
static inline mux_state_t retimer_fw_update_usb_mux_get(int port)
{
return usb_mux_get(port) & USB_RETIMER_FW_UPDATE_MUX_MASK;
}
void usb_retimer_fw_update_process_op_cb(int port)
{
switch (last_op) {
case USB_RETIMER_FW_UPDATE_SUSPEND_PD:
last_result = 0;
/*
* Do not perform retimer firmware update process
* if battery is not present, or battery level is low.
*/
if (!pd_firmware_upgrade_check_power_readiness(port)) {
last_result = USB_RETIMER_FW_UPDATE_ERR;
break;
}
/*
* If the port has entered low power mode, the PD task
* is paused and will not complete processing of
* pd_set_suspend(). Move pd_set_suspend() into a deferred
* call so that it runs from the HOOKS task and can generate
* a wake event to the PD task and enter suspended mode.
*/
hook_call_deferred(&deferred_pd_suspend_data, 0);
break;
case USB_RETIMER_FW_UPDATE_RESUME_PD:
pd_set_suspend(port, RESUME);
break;
case USB_RETIMER_FW_UPDATE_GET_MUX:
last_result = retimer_fw_update_usb_mux_get(port);
break;
case USB_RETIMER_FW_UPDATE_SET_USB:
usb_mux_set(port, USB_PD_MUX_USB_ENABLED,
USB_SWITCH_CONNECT, pd_get_polarity(port));
last_result = retimer_fw_update_usb_mux_get(port);
break;
case USB_RETIMER_FW_UPDATE_SET_SAFE:
usb_mux_set_safe_mode(port);
last_result = retimer_fw_update_usb_mux_get(port);
break;
case USB_RETIMER_FW_UPDATE_SET_TBT:
usb_mux_set(port, USB_PD_MUX_TBT_COMPAT_ENABLED,
USB_SWITCH_CONNECT, pd_get_polarity(port));
last_result = retimer_fw_update_usb_mux_get(port);
break;
case USB_RETIMER_FW_UPDATE_DISCONNECT:
usb_mux_set(port, USB_PD_MUX_NONE,
USB_SWITCH_DISCONNECT, pd_get_polarity(port));
last_result = retimer_fw_update_usb_mux_get(port);
break;
default:
break;
}
}
void usb_retimer_fw_update_process_op(int port, int op)
{
ASSERT(port >= 0 && port < CONFIG_USB_PD_PORT_MAX_COUNT);
/*
* TODO(b/179220036): check not overlapping requests;
* not change cur_port if retimer scan is in progress
*/
last_op = op;
switch (op) {
case USB_RETIMER_FW_UPDATE_QUERY_PORT:
break;
/* Operations can't be processed in ISR, defer to later */
case USB_RETIMER_FW_UPDATE_GET_MUX:
last_result = USB_RETIMER_FW_UPDATE_INVALID_MUX;
tc_usb_firmware_fw_update_run(port);
break;
case USB_RETIMER_FW_UPDATE_SUSPEND_PD:
case USB_RETIMER_FW_UPDATE_RESUME_PD:
cur_port = port;
tc_usb_firmware_fw_update_run(port);
break;
case USB_RETIMER_FW_UPDATE_SET_USB:
case USB_RETIMER_FW_UPDATE_SET_SAFE:
case USB_RETIMER_FW_UPDATE_SET_TBT:
case USB_RETIMER_FW_UPDATE_DISCONNECT:
if (pd_is_port_enabled(port)) {
last_result = USB_RETIMER_FW_UPDATE_ERR;
} else {
last_result = USB_RETIMER_FW_UPDATE_INVALID_MUX;
tc_usb_firmware_fw_update_limited_run(port);
}
break;
default:
break;
}
}
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