mirror of
https://github.com/esphome/esphome.git
synced 2024-12-02 19:54:14 +01:00
270 lines
7.7 KiB
C++
270 lines
7.7 KiB
C++
#ifdef USE_ESP8266
|
|
|
|
#include <c_types.h>
|
|
extern "C" {
|
|
#include "spi_flash.h"
|
|
}
|
|
|
|
#include "preferences.h"
|
|
#include <cstring>
|
|
#include "esphome/core/preferences.h"
|
|
#include "esphome/core/helpers.h"
|
|
#include "esphome/core/log.h"
|
|
#include "esphome/core/defines.h"
|
|
|
|
namespace esphome {
|
|
namespace esp8266 {
|
|
|
|
static const char *const TAG = "esp8266.preferences";
|
|
|
|
static bool s_prevent_write = false; // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
|
|
static uint32_t *s_flash_storage = nullptr; // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
|
|
static bool s_flash_dirty = false; // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
|
|
|
|
static const uint32_t ESP_RTC_USER_MEM_START = 0x60001200;
|
|
#define ESP_RTC_USER_MEM ((uint32_t *) ESP_RTC_USER_MEM_START)
|
|
static const uint32_t ESP_RTC_USER_MEM_SIZE_WORDS = 128;
|
|
static const uint32_t ESP_RTC_USER_MEM_SIZE_BYTES = ESP_RTC_USER_MEM_SIZE_WORDS * 4;
|
|
|
|
#ifdef USE_ESP8266_PREFERENCES_FLASH
|
|
static const uint32_t ESP8266_FLASH_STORAGE_SIZE = 128;
|
|
#else
|
|
static const uint32_t ESP8266_FLASH_STORAGE_SIZE = 64;
|
|
#endif
|
|
|
|
static inline bool esp_rtc_user_mem_read(uint32_t index, uint32_t *dest) {
|
|
if (index >= ESP_RTC_USER_MEM_SIZE_WORDS) {
|
|
return false;
|
|
}
|
|
*dest = ESP_RTC_USER_MEM[index]; // NOLINT(performance-no-int-to-ptr)
|
|
return true;
|
|
}
|
|
|
|
static inline bool esp_rtc_user_mem_write(uint32_t index, uint32_t value) {
|
|
if (index >= ESP_RTC_USER_MEM_SIZE_WORDS) {
|
|
return false;
|
|
}
|
|
if (index < 32 && s_prevent_write) {
|
|
return false;
|
|
}
|
|
|
|
auto *ptr = &ESP_RTC_USER_MEM[index]; // NOLINT(performance-no-int-to-ptr)
|
|
*ptr = value;
|
|
return true;
|
|
}
|
|
|
|
extern "C" uint32_t _SPIFFS_end; // NOLINT
|
|
|
|
static const uint32_t get_esp8266_flash_sector() {
|
|
union {
|
|
uint32_t *ptr;
|
|
uint32_t uint;
|
|
} data{};
|
|
data.ptr = &_SPIFFS_end;
|
|
return (data.uint - 0x40200000) / SPI_FLASH_SEC_SIZE;
|
|
}
|
|
static const uint32_t get_esp8266_flash_address() { return get_esp8266_flash_sector() * SPI_FLASH_SEC_SIZE; }
|
|
|
|
template<class It> uint32_t calculate_crc(It first, It last, uint32_t type) {
|
|
uint32_t crc = type;
|
|
while (first != last) {
|
|
crc ^= (*first++ * 2654435769UL) >> 1;
|
|
}
|
|
return crc;
|
|
}
|
|
|
|
static bool save_to_flash(size_t offset, const uint32_t *data, size_t len) {
|
|
for (uint32_t i = 0; i < len; i++) {
|
|
uint32_t j = offset + i;
|
|
if (j >= ESP8266_FLASH_STORAGE_SIZE)
|
|
return false;
|
|
uint32_t v = data[i];
|
|
uint32_t *ptr = &s_flash_storage[j];
|
|
if (*ptr != v)
|
|
s_flash_dirty = true;
|
|
*ptr = v;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool load_from_flash(size_t offset, uint32_t *data, size_t len) {
|
|
for (size_t i = 0; i < len; i++) {
|
|
uint32_t j = offset + i;
|
|
if (j >= ESP8266_FLASH_STORAGE_SIZE)
|
|
return false;
|
|
data[i] = s_flash_storage[j];
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool save_to_rtc(size_t offset, const uint32_t *data, size_t len) {
|
|
for (uint32_t i = 0; i < len; i++)
|
|
if (!esp_rtc_user_mem_write(offset + i, data[i]))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static bool load_from_rtc(size_t offset, uint32_t *data, size_t len) {
|
|
for (uint32_t i = 0; i < len; i++)
|
|
if (!esp_rtc_user_mem_read(offset + i, &data[i]))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
class ESP8266PreferenceBackend : public ESPPreferenceBackend {
|
|
public:
|
|
size_t offset = 0;
|
|
uint32_t type = 0;
|
|
bool in_flash = false;
|
|
size_t length_words = 0;
|
|
|
|
bool save(const uint8_t *data, size_t len) override {
|
|
if ((len + 3) / 4 != length_words) {
|
|
return false;
|
|
}
|
|
std::vector<uint32_t> buffer;
|
|
buffer.resize(length_words + 1);
|
|
memcpy(buffer.data(), data, len);
|
|
buffer[buffer.size() - 1] = calculate_crc(buffer.begin(), buffer.end() - 1, type);
|
|
|
|
if (in_flash) {
|
|
return save_to_flash(offset, buffer.data(), buffer.size());
|
|
} else {
|
|
return save_to_rtc(offset, buffer.data(), buffer.size());
|
|
}
|
|
}
|
|
bool load(uint8_t *data, size_t len) override {
|
|
if ((len + 3) / 4 != length_words) {
|
|
return false;
|
|
}
|
|
std::vector<uint32_t> buffer;
|
|
buffer.resize(length_words + 1);
|
|
bool ret;
|
|
if (in_flash) {
|
|
ret = load_from_flash(offset, buffer.data(), buffer.size());
|
|
} else {
|
|
ret = load_from_rtc(offset, buffer.data(), buffer.size());
|
|
}
|
|
if (!ret)
|
|
return false;
|
|
|
|
uint32_t crc = calculate_crc(buffer.begin(), buffer.end() - 1, type);
|
|
if (buffer[buffer.size() - 1] != crc) {
|
|
return false;
|
|
}
|
|
|
|
memcpy(data, buffer.data(), len);
|
|
return true;
|
|
}
|
|
};
|
|
|
|
class ESP8266Preferences : public ESPPreferences {
|
|
public:
|
|
uint32_t current_offset = 0;
|
|
uint32_t current_flash_offset = 0; // in words
|
|
|
|
void setup() {
|
|
s_flash_storage = new uint32_t[ESP8266_FLASH_STORAGE_SIZE]; // NOLINT
|
|
ESP_LOGVV(TAG, "Loading preferences from flash...");
|
|
|
|
{
|
|
InterruptLock lock;
|
|
spi_flash_read(get_esp8266_flash_address(), s_flash_storage, ESP8266_FLASH_STORAGE_SIZE * 4);
|
|
}
|
|
}
|
|
|
|
ESPPreferenceObject make_preference(size_t length, uint32_t type, bool in_flash) override {
|
|
uint32_t length_words = (length + 3) / 4;
|
|
if (in_flash) {
|
|
uint32_t start = current_flash_offset;
|
|
uint32_t end = start + length_words + 1;
|
|
if (end > ESP8266_FLASH_STORAGE_SIZE)
|
|
return {};
|
|
auto *pref = new ESP8266PreferenceBackend(); // NOLINT(cppcoreguidelines-owning-memory)
|
|
pref->offset = start;
|
|
pref->type = type;
|
|
pref->length_words = length_words;
|
|
pref->in_flash = true;
|
|
current_flash_offset = end;
|
|
return {pref};
|
|
}
|
|
|
|
uint32_t start = current_offset;
|
|
uint32_t end = start + length_words + 1;
|
|
bool in_normal = start < 96;
|
|
// Normal: offset 0-95 maps to RTC offset 32 - 127,
|
|
// Eboot: offset 96-127 maps to RTC offset 0 - 31 words
|
|
if (in_normal && end > 96) {
|
|
// start is in normal but end is not -> switch to Eboot
|
|
current_offset = start = 96;
|
|
end = start + length_words + 1;
|
|
in_normal = false;
|
|
}
|
|
|
|
if (end > 128) {
|
|
// Doesn't fit in data, return uninitialized preference obj.
|
|
return {};
|
|
}
|
|
|
|
uint32_t rtc_offset = in_normal ? start + 32 : start - 96;
|
|
|
|
auto *pref = new ESP8266PreferenceBackend(); // NOLINT(cppcoreguidelines-owning-memory)
|
|
pref->offset = rtc_offset;
|
|
pref->type = type;
|
|
pref->length_words = length_words;
|
|
pref->in_flash = false;
|
|
current_offset += length_words + 1;
|
|
return pref;
|
|
}
|
|
|
|
ESPPreferenceObject make_preference(size_t length, uint32_t type) override {
|
|
#ifdef USE_ESP8266_PREFERENCES_FLASH
|
|
return make_preference(length, type, true);
|
|
#else
|
|
return make_preference(length, type, false);
|
|
#endif
|
|
}
|
|
|
|
bool sync() override {
|
|
if (!s_flash_dirty)
|
|
return true;
|
|
if (s_prevent_write)
|
|
return false;
|
|
|
|
ESP_LOGD(TAG, "Saving preferences to flash...");
|
|
SpiFlashOpResult erase_res, write_res = SPI_FLASH_RESULT_OK;
|
|
{
|
|
InterruptLock lock;
|
|
erase_res = spi_flash_erase_sector(get_esp8266_flash_sector());
|
|
if (erase_res == SPI_FLASH_RESULT_OK) {
|
|
write_res = spi_flash_write(get_esp8266_flash_address(), s_flash_storage, ESP8266_FLASH_STORAGE_SIZE * 4);
|
|
}
|
|
}
|
|
if (erase_res != SPI_FLASH_RESULT_OK) {
|
|
ESP_LOGV(TAG, "Erase ESP8266 flash failed!");
|
|
return false;
|
|
}
|
|
if (write_res != SPI_FLASH_RESULT_OK) {
|
|
ESP_LOGV(TAG, "Write ESP8266 flash failed!");
|
|
return false;
|
|
}
|
|
|
|
s_flash_dirty = false;
|
|
return true;
|
|
}
|
|
};
|
|
|
|
void setup_preferences() {
|
|
auto *pref = new ESP8266Preferences(); // NOLINT(cppcoreguidelines-owning-memory)
|
|
pref->setup();
|
|
global_preferences = pref;
|
|
}
|
|
void preferences_prevent_write(bool prevent) { s_prevent_write = prevent; }
|
|
|
|
} // namespace esp8266
|
|
|
|
ESPPreferences *global_preferences; // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
|
|
|
|
} // namespace esphome
|
|
|
|
#endif // USE_ESP8266
|