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-rw-r--r--drivers/eeprom/eeprom_i2c.c23
-rw-r--r--drivers/eeprom/eeprom_stm32_L0_L1.c96
-rw-r--r--drivers/eeprom/eeprom_stm32_L0_L1.h33
3 files changed, 22 insertions, 130 deletions
diff --git a/drivers/eeprom/eeprom_i2c.c b/drivers/eeprom/eeprom_i2c.c
index 4210f06f9..8e80ff544 100644
--- a/drivers/eeprom/eeprom_i2c.c
+++ b/drivers/eeprom/eeprom_i2c.c
@@ -16,6 +16,9 @@
16 16
17#include <stdint.h> 17#include <stdint.h>
18#include <string.h> 18#include <string.h>
19#if defined(EXTERNAL_EEPROM_WP_PIN)
20# include "gpio.h"
21#endif
19 22
20/* 23/*
21 Note that the implementations of eeprom_XXXX_YYYY on AVR are normally 24 Note that the implementations of eeprom_XXXX_YYYY on AVR are normally
@@ -50,7 +53,14 @@ static inline void fill_target_address(uint8_t *buffer, const void *addr) {
50 } 53 }
51} 54}
52 55
53void eeprom_driver_init(void) { i2c_init(); } 56void eeprom_driver_init(void) {
57 i2c_init();
58#if defined(EXTERNAL_EEPROM_WP_PIN)
59 /* We are setting the WP pin to high in a way that requires at least two bit-flips to change back to 0 */
60 writePin(EXTERNAL_EEPROM_WP_PIN, 1);
61 setPinInputHigh(EXTERNAL_EEPROM_WP_PIN);
62#endif
63}
54 64
55void eeprom_driver_erase(void) { 65void eeprom_driver_erase(void) {
56#if defined(CONSOLE_ENABLE) && defined(DEBUG_EEPROM_OUTPUT) 66#if defined(CONSOLE_ENABLE) && defined(DEBUG_EEPROM_OUTPUT)
@@ -89,6 +99,11 @@ void eeprom_write_block(const void *buf, void *addr, size_t len) {
89 uint8_t * read_buf = (uint8_t *)buf; 99 uint8_t * read_buf = (uint8_t *)buf;
90 uintptr_t target_addr = (uintptr_t)addr; 100 uintptr_t target_addr = (uintptr_t)addr;
91 101
102#if defined(EXTERNAL_EEPROM_WP_PIN)
103 setPinOutput(EXTERNAL_EEPROM_WP_PIN);
104 writePin(EXTERNAL_EEPROM_WP_PIN, 0);
105#endif
106
92 while (len > 0) { 107 while (len > 0) {
93 uintptr_t page_offset = target_addr % EXTERNAL_EEPROM_PAGE_SIZE; 108 uintptr_t page_offset = target_addr % EXTERNAL_EEPROM_PAGE_SIZE;
94 int write_length = EXTERNAL_EEPROM_PAGE_SIZE - page_offset; 109 int write_length = EXTERNAL_EEPROM_PAGE_SIZE - page_offset;
@@ -116,4 +131,10 @@ void eeprom_write_block(const void *buf, void *addr, size_t len) {
116 target_addr += write_length; 131 target_addr += write_length;
117 len -= write_length; 132 len -= write_length;
118 } 133 }
134
135#if defined(EXTERNAL_EEPROM_WP_PIN)
136 /* We are setting the WP pin to high in a way that requires at least two bit-flips to change back to 0 */
137 writePin(EXTERNAL_EEPROM_WP_PIN, 1);
138 setPinInputHigh(EXTERNAL_EEPROM_WP_PIN);
139#endif
119} 140}
diff --git a/drivers/eeprom/eeprom_stm32_L0_L1.c b/drivers/eeprom/eeprom_stm32_L0_L1.c
deleted file mode 100644
index ed26cc714..000000000
--- a/drivers/eeprom/eeprom_stm32_L0_L1.c
+++ /dev/null
@@ -1,96 +0,0 @@
1/* Copyright 2020 Nick Brassel (tzarc)
2 *
3 * This program is free software: you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation, either version 2 of the License, or
6 * (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16
17#include <stdint.h>
18#include <string.h>
19
20#include <hal.h>
21#include "eeprom_driver.h"
22#include "eeprom_stm32_L0_L1.h"
23
24#define EEPROM_BASE_ADDR 0x08080000
25#define EEPROM_ADDR(offset) (EEPROM_BASE_ADDR + (offset))
26#define EEPROM_PTR(offset) ((__IO uint8_t *)EEPROM_ADDR(offset))
27#define EEPROM_BYTE(location, offset) (*(EEPROM_PTR(((uint32_t)location) + ((uint32_t)offset))))
28
29#define BUFFER_BYTE(buffer, offset) (*(((uint8_t *)buffer) + offset))
30
31#define FLASH_PEKEY1 0x89ABCDEF
32#define FLASH_PEKEY2 0x02030405
33
34static inline void STM32_L0_L1_EEPROM_WaitNotBusy(void) {
35 while (FLASH->SR & FLASH_SR_BSY) {
36 __WFI();
37 }
38}
39
40static inline void STM32_L0_L1_EEPROM_Unlock(void) {
41 STM32_L0_L1_EEPROM_WaitNotBusy();
42 if (FLASH->PECR & FLASH_PECR_PELOCK) {
43 FLASH->PEKEYR = FLASH_PEKEY1;
44 FLASH->PEKEYR = FLASH_PEKEY2;
45 }
46}
47
48static inline void STM32_L0_L1_EEPROM_Lock(void) {
49 STM32_L0_L1_EEPROM_WaitNotBusy();
50 FLASH->PECR |= FLASH_PECR_PELOCK;
51}
52
53void eeprom_driver_init(void) {}
54
55void eeprom_driver_erase(void) {
56 STM32_L0_L1_EEPROM_Unlock();
57
58 for (size_t offset = 0; offset < STM32_ONBOARD_EEPROM_SIZE; offset += sizeof(uint32_t)) {
59 FLASH->PECR |= FLASH_PECR_ERASE | FLASH_PECR_DATA;
60
61 *(__IO uint32_t *)EEPROM_ADDR(offset) = (uint32_t)0;
62
63 STM32_L0_L1_EEPROM_WaitNotBusy();
64 FLASH->PECR &= ~(FLASH_PECR_ERASE | FLASH_PECR_DATA);
65 }
66
67 STM32_L0_L1_EEPROM_Lock();
68}
69
70void eeprom_read_block(void *buf, const void *addr, size_t len) {
71 for (size_t offset = 0; offset < len; ++offset) {
72 // Drop out if we've hit the limit of the EEPROM
73 if ((((uint32_t)addr) + offset) >= STM32_ONBOARD_EEPROM_SIZE) {
74 break;
75 }
76
77 STM32_L0_L1_EEPROM_WaitNotBusy();
78 BUFFER_BYTE(buf, offset) = EEPROM_BYTE(addr, offset);
79 }
80}
81
82void eeprom_write_block(const void *buf, void *addr, size_t len) {
83 STM32_L0_L1_EEPROM_Unlock();
84
85 for (size_t offset = 0; offset < len; ++offset) {
86 // Drop out if we've hit the limit of the EEPROM
87 if ((((uint32_t)addr) + offset) >= STM32_ONBOARD_EEPROM_SIZE) {
88 break;
89 }
90
91 STM32_L0_L1_EEPROM_WaitNotBusy();
92 EEPROM_BYTE(addr, offset) = BUFFER_BYTE(buf, offset);
93 }
94
95 STM32_L0_L1_EEPROM_Lock();
96}
diff --git a/drivers/eeprom/eeprom_stm32_L0_L1.h b/drivers/eeprom/eeprom_stm32_L0_L1.h
deleted file mode 100644
index a35defca8..000000000
--- a/drivers/eeprom/eeprom_stm32_L0_L1.h
+++ /dev/null
@@ -1,33 +0,0 @@
1/* Copyright 2020 Nick Brassel (tzarc)
2 *
3 * This program is free software: you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation, either version 2 of the License, or
6 * (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16
17#pragma once
18
19/*
20 The size used by the STM32 L0/L1 EEPROM driver.
21*/
22#ifndef STM32_ONBOARD_EEPROM_SIZE
23# ifdef VIA_ENABLE
24# define STM32_ONBOARD_EEPROM_SIZE 1024
25# else
26# include "eeconfig.h"
27# define STM32_ONBOARD_EEPROM_SIZE (((EECONFIG_SIZE + 3) / 4) * 4) // based off eeconfig's current usage, aligned to 4-byte sizes, to deal with LTO and EEPROM page sizing
28# endif
29#endif
30
31#if STM32_ONBOARD_EEPROM_SIZE > 128
32# pragma message("Please note: resetting EEPROM using an STM32L0/L1 device takes up to 1 second for every 1kB of internal EEPROM used.")
33#endif
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-18 02:08:35 +0000