massdrop alt/ctrl: support saving into nvm (#6068)
* support saving into SmartEEPROM Signed-off-by: Alexandre d Alton <alex@alexdalton.org> * atsam: update smarteeprom implementation - Use define for SmartEEPROM buffer address - Check buffer overflow - Do not perform operation when timeout occurs Signed-off-by: Alexandre d'Alton <alex@alexdalton.org> * return 0 instead of ff for invalid address or timeout Signed-off-by: Alexandre d'Alton <alex@alexdalton.org> * clang-format * Add extra bounds checks Co-authored-by: zvecr <git@zvecr.com>
This commit is contained in:
parent
b02a539625
commit
90797d903c
1 changed files with 90 additions and 4 deletions
|
@ -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) {
|
||||
|
|
Loading…
Reference in a new issue