diff options
| -rw-r--r-- | tmk_core/common/arm_atsam/eeprom.c | 94 |
1 files changed, 90 insertions, 4 deletions
diff --git a/tmk_core/common/arm_atsam/eeprom.c b/tmk_core/common/arm_atsam/eeprom.c index ccd5d15a54..ff1a692623 100644 --- a/tmk_core/common/arm_atsam/eeprom.c +++ b/tmk_core/common/arm_atsam/eeprom.c @@ -13,24 +13,110 @@ * 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" #ifndef EEPROM_SIZE # include "eeconfig.h" # define EEPROM_SIZE (((EECONFIG_SIZE + 3) / 4) * 4) // based off eeconfig's current usage, aligned to 4-byte sizes, to deal with LTO #endif -__attribute__((aligned(4))) static uint8_t buffer[EEPROM_SIZE]; +#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; - return buffer[offset]; + 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; - buffer[offset] = value; + 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) { |