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; +}