OVMS3-idf/components/esp32/phy_init.c

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// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <sys/lock.h>
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#include "rom/ets_sys.h"
#include "rom/rtc.h"
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#include "soc/dport_reg.h"
#include "esp_err.h"
#include "esp_phy_init.h"
#include "esp_system.h"
#include "esp_log.h"
#include "nvs.h"
#include "nvs_flash.h"
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#include "sdkconfig.h"
#ifdef CONFIG_PHY_ENABLED
#include "phy.h"
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#include "phy_init_data.h"
#include "rtc.h"
#include "esp_coexist.h"
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static const char* TAG = "phy_init";
/* Count value to indicate if there is peripheral that has initialized PHY and RF */
static int s_phy_rf_init_count = 0;
static _lock_t s_phy_rf_init_lock;
esp_err_t esp_phy_rf_init(const esp_phy_init_data_t* init_data,
esp_phy_calibration_mode_t mode, esp_phy_calibration_data_t* calibration_data)
{
assert((s_phy_rf_init_count <= 1) && (s_phy_rf_init_count >= 0));
_lock_acquire(&s_phy_rf_init_lock);
if (s_phy_rf_init_count == 0) {
// Enable WiFi peripheral clock
SET_PERI_REG_MASK(DPORT_WIFI_CLK_EN_REG, DPORT_WIFI_CLK_WIFI_EN | DPORT_WIFI_CLK_RNG_EN);
ESP_LOGV(TAG, "register_chipv7_phy, init_data=%p, cal_data=%p, mode=%d",
init_data, calibration_data, mode);
phy_set_wifi_mode_only(0);
register_chipv7_phy(init_data, calibration_data, mode);
coex_bt_high_prio();
} else {
#if CONFIG_SW_COEXIST_ENABLE
coex_init();
#endif
}
s_phy_rf_init_count++;
_lock_release(&s_phy_rf_init_lock);
return ESP_OK;
}
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esp_err_t esp_phy_rf_deinit(void)
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{
assert((s_phy_rf_init_count <= 2) && (s_phy_rf_init_count >= 1));
_lock_acquire(&s_phy_rf_init_lock);
if (s_phy_rf_init_count == 1) {
// Disable PHY and RF.
phy_close_rf();
// Disable WiFi peripheral clock. Do not disable clock for hardware RNG
CLEAR_PERI_REG_MASK(DPORT_WIFI_CLK_EN_REG, DPORT_WIFI_CLK_WIFI_EN);
} else {
#if CONFIG_SW_COEXIST_ENABLE
coex_deinit();
#endif
}
s_phy_rf_init_count--;
_lock_release(&s_phy_rf_init_lock);
return ESP_OK;
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}
// PHY init data handling functions
#if CONFIG_ESP32_PHY_INIT_DATA_IN_PARTITION
#include "esp_partition.h"
const esp_phy_init_data_t* esp_phy_get_init_data()
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{
const esp_partition_t* partition = esp_partition_find_first(
ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_PHY, NULL);
if (partition == NULL) {
ESP_LOGE(TAG, "PHY data partition not found");
return NULL;
}
ESP_LOGD(TAG, "loading PHY init data from partition at offset 0x%x", partition->address);
size_t init_data_store_length = sizeof(phy_init_magic_pre) +
sizeof(esp_phy_init_data_t) + sizeof(phy_init_magic_post);
uint8_t* init_data_store = (uint8_t*) malloc(init_data_store_length);
if (init_data_store == NULL) {
ESP_LOGE(TAG, "failed to allocate memory for PHY init data");
return NULL;
}
esp_err_t err = esp_partition_read(partition, 0, init_data_store, init_data_store_length);
if (err != ESP_OK) {
ESP_LOGE(TAG, "failed to read PHY data partition (0x%x)", err);
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return NULL;
}
if (memcmp(init_data_store, PHY_INIT_MAGIC, sizeof(phy_init_magic_pre)) != 0 ||
memcmp(init_data_store + init_data_store_length - sizeof(phy_init_magic_post),
PHY_INIT_MAGIC, sizeof(phy_init_magic_post)) != 0) {
ESP_LOGE(TAG, "failed to validate PHY data partition");
return NULL;
}
ESP_LOGE(TAG, "PHY data partition validated");
return (const esp_phy_init_data_t*) (init_data_store + sizeof(phy_init_magic_pre));
}
void esp_phy_release_init_data(const esp_phy_init_data_t* init_data)
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{
free((uint8_t*) init_data - sizeof(phy_init_magic_pre));
}
#else // CONFIG_ESP32_PHY_INIT_DATA_IN_PARTITION
// phy_init_data.h will declare static 'phy_init_data' variable initialized with default init data
const esp_phy_init_data_t* esp_phy_get_init_data()
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{
ESP_LOGD(TAG, "loading PHY init data from application binary");
return &phy_init_data;
}
void esp_phy_release_init_data(const esp_phy_init_data_t* init_data)
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{
// no-op
}
#endif // CONFIG_ESP32_PHY_INIT_DATA_IN_PARTITION
// PHY calibration data handling functions
static const char* PHY_NAMESPACE = "phy";
static const char* PHY_CAL_VERSION_KEY = "cal_version";
static const char* PHY_CAL_MAC_KEY = "cal_mac";
static const char* PHY_CAL_DATA_KEY = "cal_data";
static esp_err_t load_cal_data_from_nvs_handle(nvs_handle handle,
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esp_phy_calibration_data_t* out_cal_data);
static esp_err_t store_cal_data_to_nvs_handle(nvs_handle handle,
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const esp_phy_calibration_data_t* cal_data);
esp_err_t esp_phy_load_cal_data_from_nvs(esp_phy_calibration_data_t* out_cal_data)
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{
esp_err_t err = nvs_flash_init();
if (err != ESP_OK) {
ESP_LOGW(TAG, "%s: failed to initialize NVS (0x%x)", __func__, err);
return err;
}
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nvs_handle handle;
err = nvs_open(PHY_NAMESPACE, NVS_READONLY, &handle);
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if (err != ESP_OK) {
ESP_LOGD(TAG, "%s: failed to open NVS namespace (0x%x)", __func__, err);
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return err;
}
else {
err = load_cal_data_from_nvs_handle(handle, out_cal_data);
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nvs_close(handle);
return err;
}
}
esp_err_t esp_phy_store_cal_data_to_nvs(const esp_phy_calibration_data_t* cal_data)
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{
nvs_handle handle;
esp_err_t err = nvs_open(PHY_NAMESPACE, NVS_READWRITE, &handle);
if (err != ESP_OK) {
ESP_LOGD(TAG, "%s: failed to open NVS namespace (0x%x)", __func__, err);
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return err;
}
else {
err = store_cal_data_to_nvs_handle(handle, cal_data);
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nvs_close(handle);
return err;
}
}
static esp_err_t load_cal_data_from_nvs_handle(nvs_handle handle,
esp_phy_calibration_data_t* out_cal_data)
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{
esp_err_t err;
uint32_t cal_data_version;
err = nvs_get_u32(handle, PHY_CAL_VERSION_KEY, &cal_data_version);
if (err != ESP_OK) {
ESP_LOGD(TAG, "%s: failed to get cal_version (0x%x)", __func__, err);
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return err;
}
uint32_t cal_format_version = phy_get_rf_cal_version() & (~BIT(16));
ESP_LOGV(TAG, "phy_get_rf_cal_version: %d\n", cal_format_version);
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if (cal_data_version != cal_format_version) {
ESP_LOGD(TAG, "%s: expected calibration data format %d, found %d",
__func__, cal_format_version, cal_data_version);
return ESP_FAIL;
}
uint8_t cal_data_mac[6];
size_t length = sizeof(cal_data_mac);
err = nvs_get_blob(handle, PHY_CAL_MAC_KEY, cal_data_mac, &length);
if (err != ESP_OK) {
ESP_LOGD(TAG, "%s: failed to get cal_mac (0x%x)", __func__, err);
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return err;
}
if (length != sizeof(cal_data_mac)) {
ESP_LOGD(TAG, "%s: invalid length of cal_mac (%d)", __func__, length);
return ESP_ERR_INVALID_SIZE;
}
uint8_t sta_mac[6];
esp_efuse_read_mac(sta_mac);
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if (memcmp(sta_mac, cal_data_mac, sizeof(sta_mac)) != 0) {
ESP_LOGE(TAG, "%s: calibration data MAC check failed: expected " \
MACSTR ", found " MACSTR,
__func__, MAC2STR(sta_mac), MAC2STR(cal_data_mac));
return ESP_FAIL;
}
length = sizeof(*out_cal_data);
err = nvs_get_blob(handle, PHY_CAL_DATA_KEY, out_cal_data, &length);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: failed to get cal_data(0x%x)", __func__, err);
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return err;
}
if (length != sizeof(*out_cal_data)) {
ESP_LOGD(TAG, "%s: invalid length of cal_data (%d)", __func__, length);
return ESP_ERR_INVALID_SIZE;
}
return ESP_OK;
}
static esp_err_t store_cal_data_to_nvs_handle(nvs_handle handle,
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const esp_phy_calibration_data_t* cal_data)
{
esp_err_t err;
uint32_t cal_format_version = phy_get_rf_cal_version() & (~BIT(16));
ESP_LOGV(TAG, "phy_get_rf_cal_version: %d\n", cal_format_version);
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err = nvs_set_u32(handle, PHY_CAL_VERSION_KEY, cal_format_version);
if (err != ESP_OK) {
return err;
}
uint8_t sta_mac[6];
esp_efuse_read_mac(sta_mac);
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err = nvs_set_blob(handle, PHY_CAL_MAC_KEY, sta_mac, sizeof(sta_mac));
if (err != ESP_OK) {
return err;
}
err = nvs_set_blob(handle, PHY_CAL_DATA_KEY, cal_data, sizeof(*cal_data));
return err;
}
void esp_phy_load_cal_and_init(void)
{
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#ifdef CONFIG_ESP32_PHY_CALIBRATION_AND_DATA_STORAGE
esp_phy_calibration_mode_t calibration_mode = PHY_RF_CAL_PARTIAL;
if (rtc_get_reset_reason(0) == DEEPSLEEP_RESET) {
calibration_mode = PHY_RF_CAL_NONE;
}
const esp_phy_init_data_t* init_data = esp_phy_get_init_data();
if (init_data == NULL) {
ESP_LOGE(TAG, "failed to obtain PHY init data");
abort();
}
esp_phy_calibration_data_t* cal_data =
(esp_phy_calibration_data_t*) calloc(sizeof(esp_phy_calibration_data_t), 1);
if (cal_data == NULL) {
ESP_LOGE(TAG, "failed to allocate memory for RF calibration data");
abort();
}
esp_err_t err = esp_phy_load_cal_data_from_nvs(cal_data);
if (err != ESP_OK) {
ESP_LOGW(TAG, "failed to load RF calibration data (0x%x), falling back to full calibration", err);
calibration_mode = PHY_RF_CAL_FULL;
}
esp_phy_rf_init(init_data, calibration_mode, cal_data);
if (calibration_mode != PHY_RF_CAL_NONE && err != ESP_OK) {
err = esp_phy_store_cal_data_to_nvs(cal_data);
} else {
err = ESP_OK;
}
esp_phy_release_init_data(init_data);
free(cal_data); // PHY maintains a copy of calibration data, so we can free this
#else
esp_phy_rf_init(NULL, PHY_RF_CAL_NONE, NULL);
#endif
}
#endif // CONFIG_PHY_ENABLED