[Patch V3 25/44] drivers: misc: s400_api: Update API for fuse read and write

Peng Fan (OSS)
2021-07-19T07:18:34Z

From: Ye Li <ye.li@nxp.com>

Add API to support fuse read and write

Signed-off-by: Ye Li <ye.li@nxp.com>
---
arch/arm/include/asm/arch-imx8ulp/s400_api.h | 7 +-
drivers/misc/imx8ulp/s400_api.c | 81 ++++++++++++++++++++
2 files changed, 87 insertions(+), 1 deletion(-)

diff --git a/arch/arm/include/asm/arch-imx8ulp/s400_api.h b/arch/arm/include/asm/arch-imx8ulp/s400_api.h
index 41ad4002b1..c848f0dfb8 100644
--- a/arch/arm/include/asm/arch-imx8ulp/s400_api.h
+++ b/arch/arm/include/asm/arch-imx8ulp/s400_api.h
@@ -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
diff --git a/drivers/misc/imx8ulp/s400_api.c b/drivers/misc/imx8ulp/s400_api.c
index 315221a463..d76a95febe 100644
--- a/drivers/misc/imx8ulp/s400_api.c
+++ b/drivers/misc/imx8ulp/s400_api.c
@@ -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;
+}
--
2.30.0