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/* Copyright 2021 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Functions needed by Serial Host Interface module for Chrome EC */
#include <zephyr/device.h>
#include <zephyr/dt-bindings/clock/npcx_clock.h>
#include <zephyr/logging/log.h>
#include <soc.h>
#include <zephyr/kernel.h>
#include <ap_power/ap_power.h>
#include "chipset.h"
#include "drivers/cros_shi.h"
#include "hooks.h"
#include "host_command.h"
#include "system.h"
LOG_MODULE_REGISTER(shim_cros_shi, LOG_LEVEL_DBG);
#define SHI_NODE DT_NODELABEL(shi)
static void shi_enable(void)
{
const struct device *cros_shi_dev = DEVICE_DT_GET(SHI_NODE);
if (!device_is_ready(cros_shi_dev)) {
LOG_ERR("Error: device %s is not ready", cros_shi_dev->name);
return;
}
LOG_INF("%s", __func__);
cros_shi_enable(cros_shi_dev);
}
static void shi_disable(void)
{
const struct device *cros_shi_dev = DEVICE_DT_GET(SHI_NODE);
if (!device_is_ready(cros_shi_dev)) {
LOG_ERR("Error: device %s is not ready", cros_shi_dev->name);
return;
}
LOG_INF("%s", __func__);
cros_shi_disable(cros_shi_dev);
}
DECLARE_HOOK(HOOK_SYSJUMP, shi_disable, HOOK_PRIO_DEFAULT);
static void shi_power_change(struct ap_power_ev_callback *cb,
struct ap_power_ev_data data)
{
switch (data.event) {
default:
return;
#if CONFIG_PLATFORM_EC_CHIPSET_RESUME_INIT_HOOK
case AP_POWER_RESUME_INIT:
shi_enable();
break;
case AP_POWER_SUSPEND_COMPLETE:
shi_disable();
break;
#else
case AP_POWER_RESUME:
shi_enable();
break;
case AP_POWER_SUSPEND:
shi_disable();
break;
#endif
}
}
static void shi_init(void)
{
static struct ap_power_ev_callback cb;
ap_power_ev_init_callback(&cb, shi_power_change,
#if CONFIG_PLATFORM_EC_CHIPSET_RESUME_INIT_HOOK
AP_POWER_RESUME_INIT |
AP_POWER_SUSPEND_COMPLETE
#else
AP_POWER_RESUME | AP_POWER_SUSPEND
#endif
);
ap_power_ev_add_callback(&cb);
if (IS_ENABLED(CONFIG_CROS_SHI_NPCX_DEBUG) ||
(system_jumped_late() && chipset_in_state(CHIPSET_STATE_ON))) {
shi_enable();
}
}
/* Call hook after chipset sets initial power state */
DECLARE_HOOK(HOOK_INIT, shi_init, HOOK_PRIO_POST_CHIPSET);
/* Get protocol information */
static enum ec_status shi_get_protocol_info(struct host_cmd_handler_args *args)
{
struct ec_response_get_protocol_info *r = args->response;
memset(r, '\0', sizeof(*r));
r->protocol_versions = BIT(3);
r->max_request_packet_size = CONFIG_CROS_SHI_MAX_REQUEST;
r->max_response_packet_size = CONFIG_CROS_SHI_MAX_RESPONSE;
r->flags = EC_PROTOCOL_INFO_IN_PROGRESS_SUPPORTED;
args->response_size = sizeof(*r);
return EC_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_GET_PROTOCOL_INFO, shi_get_protocol_info,
EC_VER_MASK(0));
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