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Add SPI 25xx EEPROM support. (#8780)

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This commit is contained in:
Nick Brassel 2020-05-19 10:34:00 +10:00 • committed by GitHub
parent 4604c70c4c
commit 54b04d9665
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GPG key ID: 4AEE18F83AFDEB23
7 changed files with 368 additions and 20 deletions
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30
drivers/eeprom/eeprom_i2c.c
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@ -50,7 +50,7 @@ static inline void init_i2c_if_required(void) {
}
static inline void fill_target_address(uint8_t *buffer, const void *addr) {
intptr_t p = (intptr_t)addr;
uintptr_t p = (uintptr_t)addr;
for (int i = 0; i < EXTERNAL_EEPROM_ADDRESS_SIZE; ++i) {
buffer[EXTERNAL_EEPROM_ADDRESS_SIZE - 1 - i] = p & 0xFF;
p >>= 8;
@ -60,11 +60,19 @@ static inline void fill_target_address(uint8_t *buffer, const void *addr) {
void eeprom_driver_init(void) {}
void eeprom_driver_erase(void) {
#ifdef CONSOLE_ENABLE
uint32_t start = timer_read32();
#endif
uint8_t buf[EXTERNAL_EEPROM_PAGE_SIZE];
memset(buf, 0x00, EXTERNAL_EEPROM_PAGE_SIZE);
for (intptr_t addr = 0; addr < EXTERNAL_EEPROM_BYTE_COUNT; addr += EXTERNAL_EEPROM_PAGE_SIZE) {
eeprom_write_block(buf, (void *)addr, EXTERNAL_EEPROM_PAGE_SIZE);
for (uint32_t addr = 0; addr < EXTERNAL_EEPROM_BYTE_COUNT; addr += EXTERNAL_EEPROM_PAGE_SIZE) {
eeprom_write_block(buf, (void *)(uintptr_t)addr, EXTERNAL_EEPROM_PAGE_SIZE);
}
#ifdef CONSOLE_ENABLE
dprintf("EEPROM erase took %ldms to complete\n", ((long)(timer_read32() - start)));
#endif
}
void eeprom_read_block(void *buf, const void *addr, size_t len) {
@ -72,8 +80,8 @@ void eeprom_read_block(void *buf, const void *addr, size_t len) {
fill_target_address(complete_packet, addr);
init_i2c_if_required();
i2c_transmit(EXTERNAL_EEPROM_I2C_ADDRESS((intptr_t)addr), complete_packet, EXTERNAL_EEPROM_ADDRESS_SIZE, 100);
i2c_receive(EXTERNAL_EEPROM_I2C_ADDRESS((intptr_t)addr), buf, len, 100);
i2c_transmit(EXTERNAL_EEPROM_I2C_ADDRESS((uintptr_t)addr), complete_packet, EXTERNAL_EEPROM_ADDRESS_SIZE, 100);
i2c_receive(EXTERNAL_EEPROM_I2C_ADDRESS((uintptr_t)addr), buf, len, 100);
#ifdef DEBUG_EEPROM_OUTPUT
dprintf("[EEPROM R] 0x%04X: ", ((int)addr));
@ -85,14 +93,14 @@ void eeprom_read_block(void *buf, const void *addr, size_t len) {
}
void eeprom_write_block(const void *buf, void *addr, size_t len) {
uint8_t complete_packet[EXTERNAL_EEPROM_ADDRESS_SIZE + EXTERNAL_EEPROM_PAGE_SIZE];
uint8_t *read_buf = (uint8_t *)buf;
intptr_t target_addr = (intptr_t)addr;
uint8_t complete_packet[EXTERNAL_EEPROM_ADDRESS_SIZE + EXTERNAL_EEPROM_PAGE_SIZE];
uint8_t * read_buf = (uint8_t *)buf;
uintptr_t target_addr = (uintptr_t)addr;
init_i2c_if_required();
while (len > 0) {
intptr_t page_offset = target_addr % EXTERNAL_EEPROM_PAGE_SIZE;
int write_length = EXTERNAL_EEPROM_PAGE_SIZE - page_offset;
uintptr_t page_offset = target_addr % EXTERNAL_EEPROM_PAGE_SIZE;
int write_length = EXTERNAL_EEPROM_PAGE_SIZE - page_offset;
if (write_length > len) {
write_length = len;
}
@ -110,7 +118,7 @@ void eeprom_write_block(const void *buf, void *addr, size_t len) {
dprintf("\n");
#endif // DEBUG_EEPROM_OUTPUT
i2c_transmit(EXTERNAL_EEPROM_I2C_ADDRESS((intptr_t)addr), complete_packet, EXTERNAL_EEPROM_ADDRESS_SIZE + write_length, 100);
i2c_transmit(EXTERNAL_EEPROM_I2C_ADDRESS((uintptr_t)addr), complete_packet, EXTERNAL_EEPROM_ADDRESS_SIZE + write_length, 100);
wait_ms(EXTERNAL_EEPROM_WRITE_TIME);
read_buf += write_length;