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@ -13,24 +13,110 @@ |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#include "eeprom.h" |
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#include "debug.h" |
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#include "samd51j18a.h" |
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#include "core_cm4.h" |
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#include "component/nvmctrl.h" |
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#ifndef EEPROM_SIZE |
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# include "eeconfig.h" |
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# define EEPROM_SIZE (((EECONFIG_SIZE + 3) / 4) * 4) // based off eeconfig's current usage, aligned to 4-byte sizes, to deal with LTO |
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#endif |
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__attribute__((aligned(4))) static uint8_t buffer[EEPROM_SIZE]; |
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#ifndef MAX |
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# define MAX(X, Y) ((X) > (Y) ? (X) : (Y)) |
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#endif |
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#ifndef BUSY_RETRIES |
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# define BUSY_RETRIES 10000 |
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#endif |
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// #define DEBUG_EEPROM_OUTPUT |
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/* |
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* Debug print utils |
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*/ |
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#if defined(DEBUG_EEPROM_OUTPUT) |
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# define eeprom_printf(fmt, ...) xprintf(fmt, ##__VA_ARGS__); |
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#else /* NO_DEBUG */ |
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# define eeprom_printf(fmt, ...) |
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#endif /* NO_DEBUG */ |
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__attribute__((aligned(4))) static uint8_t buffer[EEPROM_SIZE] = {0}; |
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volatile uint8_t * SmartEEPROM8 = (uint8_t *)SEEPROM_ADDR; |
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static inline bool eeprom_is_busy(void) { |
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int timeout = BUSY_RETRIES; |
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while (NVMCTRL->SEESTAT.bit.BUSY && timeout-- > 0) |
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; |
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return NVMCTRL->SEESTAT.bit.BUSY; |
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} |
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static uint32_t get_virtual_eeprom_size(void) { |
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// clang-format off |
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static const uint32_t VIRTUAL_EEPROM_MAP[11][8] = { |
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/* 4 8 16 32 64 128 256 512 */ |
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/* 0*/ { 0, 0, 0, 0, 0, 0, 0, 0 }, |
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/* 1*/ { 512, 1024, 2048, 4096, 4096, 4096, 4096, 4096 }, |
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/* 2*/ { 512, 1024, 2048, 4096, 8192, 8192, 8192, 8192 }, |
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/* 3*/ { 512, 1024, 2048, 4096, 8192, 16384, 16384, 16384 }, |
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/* 4*/ { 512, 1024, 2048, 4096, 8192, 16384, 16384, 16384 }, |
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/* 5*/ { 512, 1024, 2048, 4096, 8192, 16384, 32768, 32768 }, |
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/* 6*/ { 512, 1024, 2048, 4096, 8192, 16384, 32768, 32768 }, |
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/* 7*/ { 512, 1024, 2048, 4096, 8192, 16384, 32768, 32768 }, |
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/* 8*/ { 512, 1024, 2048, 4096, 8192, 16384, 32768, 32768 }, |
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/* 9*/ { 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536 }, |
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/*10*/ { 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536 }, |
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}; |
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// clang-format on |
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static uint32_t virtual_eeprom_size = UINT32_MAX; |
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if (virtual_eeprom_size == UINT32_MAX) { |
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virtual_eeprom_size = VIRTUAL_EEPROM_MAP[NVMCTRL->SEESTAT.bit.PSZ][NVMCTRL->SEESTAT.bit.SBLK]; |
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} |
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// eeprom_printf("get_virtual_eeprom_size:: %d:%d:%d\n", NVMCTRL->SEESTAT.bit.PSZ, NVMCTRL->SEESTAT.bit.SBLK, virtual_eeprom_size); |
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return virtual_eeprom_size; |
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} |
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uint8_t eeprom_read_byte(const uint8_t *addr) { |
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uintptr_t offset = (uintptr_t)addr; |
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return buffer[offset]; |
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if (offset >= MAX(EEPROM_SIZE, get_virtual_eeprom_size())) { |
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eeprom_printf("eeprom_read_byte:: out of bounds\n"); |
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return 0x0; |
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} |
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if (get_virtual_eeprom_size() == 0) { |
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return buffer[offset]; |
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} |
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if (eeprom_is_busy()) { |
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eeprom_printf("eeprom_write_byte:: timeout\n"); |
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return 0x0; |
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} |
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return SmartEEPROM8[offset]; |
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} |
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void eeprom_write_byte(uint8_t *addr, uint8_t value) { |
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uintptr_t offset = (uintptr_t)addr; |
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buffer[offset] = value; |
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if (offset >= MAX(EEPROM_SIZE, get_virtual_eeprom_size())) { |
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eeprom_printf("eeprom_write_byte:: out of bounds\n"); |
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return; |
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} |
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if (get_virtual_eeprom_size() == 0) { |
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buffer[offset] = value; |
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return; |
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} |
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if (eeprom_is_busy()) { |
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eeprom_printf("eeprom_write_byte:: timeout\n"); |
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return; |
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} |
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SmartEEPROM8[offset] = value; |
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} |
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uint16_t eeprom_read_word(const uint16_t *addr) { |
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