diff options
Diffstat (limited to 'quantum/nvm/eeprom/nvm_via.c')
-rw-r--r-- | quantum/nvm/eeprom/nvm_via.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/quantum/nvm/eeprom/nvm_via.c b/quantum/nvm/eeprom/nvm_via.c new file mode 100644 index 0000000000..5372791fb7 --- /dev/null +++ b/quantum/nvm/eeprom/nvm_via.c @@ -0,0 +1,77 @@ +// Copyright 2024 Nick Brassel (@tzarc) +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "eeprom.h" +#include "util.h" +#include "via.h" +#include "nvm_via.h" +#include "nvm_eeprom_eeconfig_internal.h" +#include "nvm_eeprom_via_internal.h" + +void nvm_via_erase(void) { + // No-op, nvm_eeconfig_erase() will have already erased EEPROM if necessary. +} + +void nvm_via_read_magic(uint8_t *magic0, uint8_t *magic1, uint8_t *magic2) { + if (magic0) { + *magic0 = eeprom_read_byte((void *)VIA_EEPROM_MAGIC_ADDR + 0); + } + + if (magic1) { + *magic1 = eeprom_read_byte((void *)VIA_EEPROM_MAGIC_ADDR + 1); + } + + if (magic2) { + *magic2 = eeprom_read_byte((void *)VIA_EEPROM_MAGIC_ADDR + 2); + } +} + +void nvm_via_update_magic(uint8_t magic0, uint8_t magic1, uint8_t magic2) { + eeprom_update_byte((void *)VIA_EEPROM_MAGIC_ADDR + 0, magic0); + eeprom_update_byte((void *)VIA_EEPROM_MAGIC_ADDR + 1, magic1); + eeprom_update_byte((void *)VIA_EEPROM_MAGIC_ADDR + 2, magic2); +} + +uint32_t nvm_via_read_layout_options(void) { + uint32_t value = 0; + // Start at the most significant byte + void *source = (void *)(VIA_EEPROM_LAYOUT_OPTIONS_ADDR); + for (uint8_t i = 0; i < VIA_EEPROM_LAYOUT_OPTIONS_SIZE; i++) { + value = value << 8; + value |= eeprom_read_byte(source); + source++; + } + return value; +} + +void nvm_via_update_layout_options(uint32_t val) { + // Start at the least significant byte + void *target = (void *)(VIA_EEPROM_LAYOUT_OPTIONS_ADDR + VIA_EEPROM_LAYOUT_OPTIONS_SIZE - 1); + for (uint8_t i = 0; i < VIA_EEPROM_LAYOUT_OPTIONS_SIZE; i++) { + eeprom_update_byte(target, val & 0xFF); + val = val >> 8; + target--; + } +} + +uint32_t nvm_via_read_custom_config(void *buf, uint32_t offset, uint32_t length) { +#if VIA_EEPROM_CUSTOM_CONFIG_SIZE > 0 + void *ee_start = (void *)(uintptr_t)(VIA_EEPROM_CUSTOM_CONFIG_ADDR + offset); + void *ee_end = (void *)(uintptr_t)(VIA_EEPROM_CUSTOM_CONFIG_ADDR + MIN(VIA_EEPROM_CUSTOM_CONFIG_SIZE, offset + length)); + eeprom_read_block(buf, ee_start, ee_end - ee_start); + return ee_end - ee_start; +#else + return 0; +#endif +} + +uint32_t nvm_via_update_custom_config(const void *buf, uint32_t offset, uint32_t length) { +#if VIA_EEPROM_CUSTOM_CONFIG_SIZE > 0 + void *ee_start = (void *)(uintptr_t)(VIA_EEPROM_CUSTOM_CONFIG_ADDR + offset); + void *ee_end = (void *)(uintptr_t)(VIA_EEPROM_CUSTOM_CONFIG_ADDR + MIN(VIA_EEPROM_CUSTOM_CONFIG_SIZE, offset + length)); + eeprom_update_block(buf, ee_start, ee_end - ee_start); + return ee_end - ee_start; +#else + return 0; +#endif +} |