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efuse(esp32c2): Support eFuse key APIs

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KonstantinKondrashov
2021-12-03 01:48:47 +08:00
parent 3a23340e40
commit ebdc52d4e2
41 changed files with 1706 additions and 460 deletions
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91
components/efuse/esp32c2/esp_efuse_utility.c
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@@ -13,24 +13,84 @@
#include "esp_private/esp_clk.h"
#include "esp32c2/rom/efuse.h"
static const char *TAG = "efuse";
#ifdef CONFIG_EFUSE_VIRTUAL
extern uint32_t virt_blocks[EFUSE_BLK_MAX][COUNT_EFUSE_REG_PER_BLOCK];
#endif // CONFIG_EFUSE_VIRTUAL
/*Range addresses to read blocks*/
const esp_efuse_range_addr_t range_read_addr_blocks[] = {
{EFUSE_RD_WR_DIS_REG, EFUSE_RD_REPEAT_DATA0_REG}, // range address of EFUSE_BLK0 REPEAT
{EFUSE_RD_BLK1_DATA0_REG, EFUSE_RD_BLK1_DATA2_REG}, // range address of EFUSE_BLK1 SYS_DATA_PART0
{EFUSE_RD_BLK2_DATA0_REG, EFUSE_RD_BLK2_DATA7_REG}, // range address of EFUSE_BLK2 SYS_DATA_PART_1
{EFUSE_RD_BLK3_DATA0_REG, EFUSE_RD_BLK3_DATA7_REG}, // range address of EFUSE_BLK3 KEY0
{EFUSE_RD_WR_DIS_REG, EFUSE_RD_REPEAT_DATA0_REG}, // range address of EFUSE_BLK0 (2 regs) REPEAT
{EFUSE_RD_BLK1_DATA0_REG, EFUSE_RD_BLK1_DATA2_REG}, // range address of EFUSE_BLK1 (3 regs) SYS_DATA_PART0
{EFUSE_RD_BLK2_DATA0_REG, EFUSE_RD_BLK2_DATA7_REG}, // range address of EFUSE_BLK2 (8 regs) SYS_DATA_PART_1
{EFUSE_RD_BLK3_DATA0_REG, EFUSE_RD_BLK3_DATA7_REG}, // range address of EFUSE_BLK3 (8 regs) KEY0
};
static uint32_t write_mass_blocks[EFUSE_BLK_MAX][COUNT_EFUSE_REG_PER_BLOCK] = { 0 };
/*Range addresses to write blocks (it is not real regs, it is buffer) */
const esp_efuse_range_addr_t range_write_addr_blocks[] = {
{(uint32_t) &write_mass_blocks[EFUSE_BLK0][0], (uint32_t) &write_mass_blocks[EFUSE_BLK0][1]},
{(uint32_t) &write_mass_blocks[EFUSE_BLK1][0], (uint32_t) &write_mass_blocks[EFUSE_BLK1][2]},
{(uint32_t) &write_mass_blocks[EFUSE_BLK2][0], (uint32_t) &write_mass_blocks[EFUSE_BLK2][7]},
{(uint32_t) &write_mass_blocks[EFUSE_BLK3][0], (uint32_t) &write_mass_blocks[EFUSE_BLK3][7]},
};
#ifndef CONFIG_EFUSE_VIRTUAL
// Update Efuse timing configuration
static esp_err_t esp_efuse_set_timing(void)
{
// no need to set special timing values
return ESP_OK;
}
#endif // ifndef CONFIG_EFUSE_VIRTUAL
// Efuse read operation: copies data from physical efuses to efuse read registers.
void esp_efuse_utility_clear_program_registers(void)
{
abort();
ets_efuse_read();
ets_efuse_clear_program_registers();
}
// Burn values written to the efuse write registers
void esp_efuse_utility_burn_chip(void)
{
abort();
#ifdef CONFIG_EFUSE_VIRTUAL
ESP_LOGW(TAG, "Virtual efuses enabled: Not really burning eFuses");
for (int num_block = EFUSE_BLK_MAX - 1; num_block >= EFUSE_BLK0; num_block--) {
int subblock = 0;
for (uint32_t addr_wr_block = range_write_addr_blocks[num_block].start; addr_wr_block <= range_write_addr_blocks[num_block].end; addr_wr_block += 4) {
virt_blocks[num_block][subblock++] |= REG_READ(addr_wr_block);
}
}
#ifdef CONFIG_EFUSE_VIRTUAL_KEEP_IN_FLASH
esp_efuse_utility_write_efuses_to_flash();
#endif
#else
if (esp_efuse_set_timing() != ESP_OK) {
ESP_LOGE(TAG, "Efuse fields are not burnt");
} else {
// Permanently update values written to the efuse write registers
// It is necessary to process blocks in the order from MAX-> EFUSE_BLK0, because EFUSE_BLK0 has protection bits for other blocks.
for (int num_block = EFUSE_BLK_MAX - 1; num_block >= EFUSE_BLK0; num_block--) {
for (uint32_t addr_wr_block = range_write_addr_blocks[num_block].start; addr_wr_block <= range_write_addr_blocks[num_block].end; addr_wr_block += 4) {
if (REG_READ(addr_wr_block) != 0) {
if (esp_efuse_get_coding_scheme(num_block) == EFUSE_CODING_SCHEME_RS) {
uint8_t block_rs[12];
ets_efuse_rs_calculate((void *)range_write_addr_blocks[num_block].start, block_rs);
memcpy((void *)EFUSE_PGM_CHECK_VALUE0_REG, block_rs, sizeof(block_rs));
}
int data_len = (range_write_addr_blocks[num_block].end - range_write_addr_blocks[num_block].start) + sizeof(uint32_t);
memcpy((void *)EFUSE_PGM_DATA0_REG, (void *)range_write_addr_blocks[num_block].start, data_len);
ets_efuse_program(num_block);
break;
}
}
}
}
#endif // CONFIG_EFUSE_VIRTUAL
esp_efuse_utility_reset();
}
// After esp_efuse_write.. functions EFUSE_BLKx_WDATAx_REG were filled is not coded values.
@@ -39,5 +99,22 @@ void esp_efuse_utility_burn_chip(void)
// They will be filled during the burn operation.
esp_err_t esp_efuse_utility_apply_new_coding_scheme()
{
abort();
// start with EFUSE_BLK1. EFUSE_BLK0 - always uses EFUSE_CODING_SCHEME_NONE.
for (int num_block = EFUSE_BLK1; num_block < EFUSE_BLK_MAX; num_block++) {
if (esp_efuse_get_coding_scheme(num_block) == EFUSE_CODING_SCHEME_RS) {
for (uint32_t addr_wr_block = range_write_addr_blocks[num_block].start; addr_wr_block <= range_write_addr_blocks[num_block].end; addr_wr_block += 4) {
if (REG_READ(addr_wr_block)) {
int num_reg = 0;
for (uint32_t addr_rd_block = range_read_addr_blocks[num_block].start; addr_rd_block <= range_read_addr_blocks[num_block].end; addr_rd_block += 4, ++num_reg) {
if (esp_efuse_utility_read_reg(num_block, num_reg)) {
ESP_LOGE(TAG, "Bits are not empty. Write operation is forbidden.");
return ESP_ERR_CODING;
}
}
break;
}
}
}
}
return ESP_OK;
}