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drivers: misc: s400_api: Update API for fuse read and write

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Add API to support fuse read and write

Signed-off-by: Ye Li <ye.li@nxp.com>
This commit is contained in:
Ye Li 2021-08-07 16:00:54 +08:00 committed by Stefano Babic
parent 7aeaf4d9a6
commit 26b53212b8
2 changed files with 87 additions and 1 deletions
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7
arch/arm/include/asm/arch-imx8ulp/s400_api.h
View File

@ -14,8 +14,11 @@
#define AHAB_AUTH_OEM_CTNR_CID 0x87
#define AHAB_VERIFY_IMG_CID 0x88
#define AHAB_RELEASE_CTNR_CID 0x89
#define AHAB_RELEASE_RDC_REQ_CID 0xC4
#define AHAB_WRITE_SECURE_FUSE_REQ_CID 0x91
#define AHAB_FWD_LIFECYCLE_UP_REQ_CID 0x95
#define AHAB_READ_FUSE_REQ_CID 0x97
#define AHAB_RELEASE_RDC_REQ_CID 0xC4
#define AHAB_WRITE_FUSE_REQ_CID 0xD6
#define S400_MAX_MSG 8U
@ -32,5 +35,7 @@ int ahab_auth_oem_ctnr(ulong ctnr_addr, u32 *response);
int ahab_release_container(u32 *response);
int ahab_verify_image(u32 img_id, u32 *response);
int ahab_forward_lifecycle(u16 life_cycle, u32 *response);
int ahab_write_fuse(u16 fuse_id, u32 fuse_val, bool lock, u32 *response);
int ahab_read_common_fuse(u16 fuse_id, u32 *fuse_words, u32 fuse_num, u32 *response);
#endif

81
drivers/misc/imx8ulp/s400_api.c
View File

@ -161,3 +161,84 @@ int ahab_forward_lifecycle(u16 life_cycle, u32 *response)
return ret;
}
int ahab_read_common_fuse(u16 fuse_id, u32 *fuse_words, u32 fuse_num, u32 *response)
{
struct udevice *dev = gd->arch.s400_dev;
int size = sizeof(struct imx8ulp_s400_msg);
struct imx8ulp_s400_msg msg;
int ret;
if (!dev) {
printf("s400 dev is not initialized\n");
return -ENODEV;
}
if (!fuse_words) {
printf("Invalid parameters for fuse read\n");
return -EINVAL;
}
if ((fuse_id != 1 && fuse_num != 1) ||
(fuse_id == 1 && fuse_num != 4)) {
printf("Invalid fuse number parameter\n");
return -EINVAL;
}
msg.version = AHAB_VERSION;
msg.tag = AHAB_CMD_TAG;
msg.size = 2;
msg.command = AHAB_READ_FUSE_REQ_CID;
msg.data[0] = fuse_id;
ret = misc_call(dev, false, &msg, size, &msg, size);
if (ret)
printf("Error: %s: ret %d, fuse_id 0x%x, response 0x%x\n",
__func__, ret, fuse_id, msg.data[0]);
if (response)
*response = msg.data[0];
fuse_words[0] = msg.data[1];
if (fuse_id == 1) {
/* OTP_UNIQ_ID */
fuse_words[1] = msg.data[2];
fuse_words[2] = msg.data[3];
fuse_words[3] = msg.data[4];
}
return ret;
}
int ahab_write_fuse(u16 fuse_id, u32 fuse_val, bool lock, u32 *response)
{
struct udevice *dev = gd->arch.s400_dev;
int size = sizeof(struct imx8ulp_s400_msg);
struct imx8ulp_s400_msg msg;
int ret;
if (!dev) {
printf("s400 dev is not initialized\n");
return -ENODEV;
}
msg.version = AHAB_VERSION;
msg.tag = AHAB_CMD_TAG;
msg.size = 3;
msg.command = AHAB_WRITE_FUSE_REQ_CID;
msg.data[0] = (32 << 16) | (fuse_id << 5);
if (lock)
msg.data[0] |= (1 << 31);
msg.data[1] = fuse_val;
ret = misc_call(dev, false, &msg, size, &msg, size);
if (ret)
printf("Error: %s: ret %d, fuse_id 0x%x, response 0x%x\n",
__func__, ret, fuse_id, msg.data[0]);
if (response)
*response = msg.data[0];
return ret;
}