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/* Copyright 2017 Fred Sundvik
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "eeprom.h"
#include "debug.h"
#include "samd51j18a.h"
#include "core_cm4.h"
#include "component/nvmctrl.h"
#include "eeprom_samd.h"
#ifndef MAX
# define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
#endif
#ifndef BUSY_RETRIES
# define BUSY_RETRIES 10000
#endif
// #define DEBUG_EEPROM_OUTPUT
/*
* Debug print utils
*/
#if defined(DEBUG_EEPROM_OUTPUT)
# define eeprom_printf(fmt, ...) xprintf(fmt, ##__VA_ARGS__);
#else /* NO_DEBUG */
# define eeprom_printf(fmt, ...)
#endif /* NO_DEBUG */
__attribute__((aligned(4))) static uint8_t buffer[EEPROM_SIZE] = {0};
volatile uint8_t * SmartEEPROM8 = (uint8_t *)SEEPROM_ADDR;
static inline bool eeprom_is_busy(void) {
int timeout = BUSY_RETRIES;
while (NVMCTRL->SEESTAT.bit.BUSY && timeout-- > 0)
;
return NVMCTRL->SEESTAT.bit.BUSY;
}
static uint32_t get_virtual_eeprom_size(void) {
// clang-format off
static const uint32_t VIRTUAL_EEPROM_MAP[11][8] = {
/* 4 8 16 32 64 128 256 512 */
/* 0*/ { 0, 0, 0, 0, 0, 0, 0, 0 },
/* 1*/ { 512, 1024, 2048, 4096, 4096, 4096, 4096, 4096 },
/* 2*/ { 512, 1024, 2048, 4096, 8192, 8192, 8192, 8192 },
/* 3*/ { 512, 1024, 2048, 4096, 8192, 16384, 16384, 16384 },
/* 4*/ { 512, 1024, 2048, 4096, 8192, 16384, 16384, 16384 },
/* 5*/ { 512, 1024, 2048, 4096, 8192, 16384, 32768, 32768 },
/* 6*/ { 512, 1024, 2048, 4096, 8192, 16384, 32768, 32768 },
/* 7*/ { 512, 1024, 2048, 4096, 8192, 16384, 32768, 32768 },
/* 8*/ { 512, 1024, 2048, 4096, 8192, 16384, 32768, 32768 },
/* 9*/ { 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536 },
/*10*/ { 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536 },
};
// clang-format on
static uint32_t virtual_eeprom_size = UINT32_MAX;
if (virtual_eeprom_size == UINT32_MAX) {
virtual_eeprom_size = VIRTUAL_EEPROM_MAP[NVMCTRL->SEESTAT.bit.PSZ][NVMCTRL->SEESTAT.bit.SBLK];
}
// eeprom_printf("get_virtual_eeprom_size:: %d:%d:%d\n", NVMCTRL->SEESTAT.bit.PSZ, NVMCTRL->SEESTAT.bit.SBLK, virtual_eeprom_size);
return virtual_eeprom_size;
}
uint8_t eeprom_read_byte(const uint8_t *addr) {
uintptr_t offset = (uintptr_t)addr;
if (offset >= MAX(EEPROM_SIZE, get_virtual_eeprom_size())) {
eeprom_printf("eeprom_read_byte:: out of bounds\n");
return 0x0;
}
if (get_virtual_eeprom_size() == 0) {
return buffer[offset];
}
if (eeprom_is_busy()) {
eeprom_printf("eeprom_write_byte:: timeout\n");
return 0x0;
}
return SmartEEPROM8[offset];
}
void eeprom_write_byte(uint8_t *addr, uint8_t value) {
uintptr_t offset = (uintptr_t)addr;
if (offset >= MAX(EEPROM_SIZE, get_virtual_eeprom_size())) {
eeprom_printf("eeprom_write_byte:: out of bounds\n");
return;
}
if (get_virtual_eeprom_size() == 0) {
buffer[offset] = value;
return;
}
if (eeprom_is_busy()) {
eeprom_printf("eeprom_write_byte:: timeout\n");
return;
}
SmartEEPROM8[offset] = value;
}
uint16_t eeprom_read_word(const uint16_t *addr) {
const uint8_t *p = (const uint8_t *)addr;
return eeprom_read_byte(p) | (eeprom_read_byte(p + 1) << 8);
}
uint32_t eeprom_read_dword(const uint32_t *addr) {
const uint8_t *p = (const uint8_t *)addr;
return eeprom_read_byte(p) | (eeprom_read_byte(p + 1) << 8) | (eeprom_read_byte(p + 2) << 16) | (eeprom_read_byte(p + 3) << 24);
}
void eeprom_read_block(void *buf, const void *addr, size_t len) {
const uint8_t *p = (const uint8_t *)addr;
uint8_t * dest = (uint8_t *)buf;
while (len--) {
*dest++ = eeprom_read_byte(p++);
}
}
void eeprom_write_word(uint16_t *addr, uint16_t value) {
uint8_t *p = (uint8_t *)addr;
eeprom_write_byte(p++, value);
eeprom_write_byte(p, value >> 8);
}
void eeprom_write_dword(uint32_t *addr, uint32_t value) {
uint8_t *p = (uint8_t *)addr;
eeprom_write_byte(p++, value);
eeprom_write_byte(p++, value >> 8);
eeprom_write_byte(p++, value >> 16);
eeprom_write_byte(p, value >> 24);
}
void eeprom_write_block(const void *buf, void *addr, size_t len) {
uint8_t * p = (uint8_t *)addr;
const uint8_t *src = (const uint8_t *)buf;
while (len--) {
eeprom_write_byte(p++, *src++);
}
}
void eeprom_update_byte(uint8_t *addr, uint8_t value) {
eeprom_write_byte(addr, value);
}
void eeprom_update_word(uint16_t *addr, uint16_t value) {
uint8_t *p = (uint8_t *)addr;
eeprom_write_byte(p++, value);
eeprom_write_byte(p, value >> 8);
}
void eeprom_update_dword(uint32_t *addr, uint32_t value) {
uint8_t *p = (uint8_t *)addr;
eeprom_write_byte(p++, value);
eeprom_write_byte(p++, value >> 8);
eeprom_write_byte(p++, value >> 16);
eeprom_write_byte(p, value >> 24);
}
void eeprom_update_block(const void *buf, void *addr, size_t len) {
uint8_t * p = (uint8_t *)addr;
const uint8_t *src = (const uint8_t *)buf;
while (len--) {
eeprom_write_byte(p++, *src++);
}
}
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