diff options
Diffstat (limited to 'drivers/eeprom/eeprom_spi.c')
| -rw-r--r-- | drivers/eeprom/eeprom_spi.c | 42 |
1 files changed, 19 insertions, 23 deletions
diff --git a/drivers/eeprom/eeprom_spi.c b/drivers/eeprom/eeprom_spi.c index 25955498c4..51ba25dece 100644 --- a/drivers/eeprom/eeprom_spi.c +++ b/drivers/eeprom/eeprom_spi.c @@ -58,14 +58,20 @@ static bool spi_eeprom_start(void) { static spi_status_t spi_eeprom_wait_while_busy(int timeout) { uint32_t deadline = timer_read32() + timeout; - spi_status_t response; - do { + spi_status_t response = SR_WIP; + while (response & SR_WIP) { + if (!spi_eeprom_start()) { + return SPI_STATUS_ERROR; + } + spi_write(CMD_RDSR); response = spi_read(); + spi_stop(); + if (timer_read32() >= deadline) { return SPI_STATUS_TIMEOUT; } - } while (response & SR_WIP); + } return SPI_STATUS_SUCCESS; } @@ -105,27 +111,21 @@ void eeprom_driver_erase(void) { void eeprom_read_block(void *buf, const void *addr, size_t len) { //------------------------------------------------- // Wait for the write-in-progress bit to be cleared - bool res = spi_eeprom_start(); - if (!res) { - dprint("failed to start SPI for WIP check\n"); - memset(buf, 0, len); - return; - } - spi_status_t response = spi_eeprom_wait_while_busy(EXTERNAL_EEPROM_SPI_TIMEOUT); - spi_stop(); - if (response == SPI_STATUS_TIMEOUT) { - dprint("SPI timeout for WIP check\n"); + if (response != SPI_STATUS_SUCCESS) { + spi_stop(); memset(buf, 0, len); + dprint("SPI timeout for WIP check\n"); return; } //------------------------------------------------- // Perform read - res = spi_eeprom_start(); + bool res = spi_eeprom_start(); if (!res) { - dprint("failed to start SPI for read\n"); + spi_stop(); memset(buf, 0, len); + dprint("failed to start SPI for read\n"); return; } @@ -158,15 +158,9 @@ void eeprom_write_block(const void *buf, void *addr, size_t len) { //------------------------------------------------- // Wait for the write-in-progress bit to be cleared - res = spi_eeprom_start(); - if (!res) { - dprint("failed to start SPI for WIP check\n"); - return; - } - spi_status_t response = spi_eeprom_wait_while_busy(EXTERNAL_EEPROM_SPI_TIMEOUT); - spi_stop(); - if (response == SPI_STATUS_TIMEOUT) { + if (response != SPI_STATUS_SUCCESS) { + spi_stop(); dprint("SPI timeout for WIP check\n"); return; } @@ -175,6 +169,7 @@ void eeprom_write_block(const void *buf, void *addr, size_t len) { // Enable writes res = spi_eeprom_start(); if (!res) { + spi_stop(); dprint("failed to start SPI for write-enable\n"); return; } @@ -186,6 +181,7 @@ void eeprom_write_block(const void *buf, void *addr, size_t len) { // Perform the write res = spi_eeprom_start(); if (!res) { + spi_stop(); dprint("failed to start SPI for write\n"); return; } |