aboot: mdtp: Fix MDTP eFuse read
LK cannot use SCM to read eFuses anymore, since this call
is blocked to LK from security reasons. Though, MDTP eFuse
is allowed to be accessed directly from HLOS.
This commit modifies MDTP eFuse read logic, such that it
is read directly via IO READ. The MDTP eFuse address is fixed
as well.
Change-Id: I15d04cd6bbf454422adbcfe9466774546c291d8d
diff --git a/app/aboot/mdtp_fuse.c b/app/aboot/mdtp_fuse.c
index 81351f4..a66f87b 100644
--- a/app/aboot/mdtp_fuse.c
+++ b/app/aboot/mdtp_fuse.c
@@ -32,12 +32,11 @@
#include <partition_parser.h>
#include <string.h>
#include <stdlib.h>
-
+#include <reg.h>
#include "mdtp.h"
#include "scm.h"
#define MAX_METADATA_SIZE (0x1000)
-#define QFPROM_ADDR_SPACE_RAW (0)
/********************************************************************************/
@@ -156,21 +155,12 @@
*/
static int read_QFPROM_fuse(uint8_t *mask)
{
- static const uint32_t row_address = MDTP_EFUSE_ADDRESS;
- uint32_t addr_type = QFPROM_ADDR_SPACE_RAW;
- uint32_t row_data[2] = {0};
- uint32_t qfprom_api_status = 0;
+ uint32_t val = 0;
- /* Read the current row where the eFuse is located */
- (void) qfprom_read_row_cmd(row_address, addr_type, row_data, &qfprom_api_status);
- if (qfprom_api_status)
- {
- dprintf(CRITICAL, "mdtp: write_QFPROM_fuse: qsee_fuse_read failed. qfprom_api_status=%d", qfprom_api_status);
- return -1;
- }
+ val = readl(MDTP_EFUSE_ADDRESS);
/* Shift the read data to be reflected in mask */
- *mask = (uint8_t)(row_data[0] >> MDTP_EFUSE_START);
+ *mask = (uint8_t)(val >> MDTP_EFUSE_START);
return 0;
}