[PATCH V2 29/49] misc: fuse: support to access fuse on i.MX93

[Peng Fan (OSS)]

From: Alice Guo <alice.guo at nxp.com>

i.MX93 fuse can be accessed through FSB and s400-api. Add mapping tables
for i.MX93. The offset address of FSB accessing OTP shadow registers is
different between i.MX8ULP and i.MX93, so use macro to define the offset
address instead of hardcode.

Signed-off-by: Alice Guo <alice.guo at nxp.com>
Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
 arch/arm/include/asm/arch-imx9/imx-regs.h |  2 ++
 drivers/misc/sentinel/fuse.c              | 30 ++++++++++++++++++++++-
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/arch/arm/include/asm/arch-imx9/imx-regs.h b/arch/arm/include/asm/arch-imx9/imx-regs.h
index 7b84b970b75..fa6951ebbe8 100644
--- a/arch/arm/include/asm/arch-imx9/imx-regs.h
+++ b/arch/arm/include/asm/arch-imx9/imx-regs.h
@@ -19,6 +19,8 @@
 #define WDG4_BASE_ADDR      0x424a0000UL
 #define WDG5_BASE_ADDR      0x424b0000UL
 
+#define FSB_BASE_ADDR       0x47510000UL
+
 #if !(defined(__KERNEL_STRICT_NAMES) || defined(__ASSEMBLY__))
 #include <asm/types.h>
 #include <stdbool.h>
diff --git a/drivers/misc/sentinel/fuse.c b/drivers/misc/sentinel/fuse.c
index 83d2c25731f..abb4c072f9b 100644
--- a/drivers/misc/sentinel/fuse.c
+++ b/drivers/misc/sentinel/fuse.c
@@ -31,6 +31,9 @@ struct s400_map_entry {
 	u32 s400_index;
 };
 
+#if defined(CONFIG_IMX8ULP)
+#define FSB_OTP_SHADOW	0x800
+
 struct fsb_map_entry fsb_mapping_table[] = {
 	{ 3, 8 },
 	{ 4, 8 },
@@ -65,6 +68,31 @@ struct s400_map_entry s400_api_mapping_table[] = {
 	{ 23, 1, 4, 2 }, /* OTFAD */
 	{ 25, 8 }, /* Test config2 */
 };
+#elif defined(CONFIG_ARCH_IMX9)
+#define FSB_OTP_SHADOW	0x8000
+
+struct fsb_map_entry fsb_mapping_table[] = {
+	{ 0, 8 },
+	{ 1, 8 },
+	{ 2, 8 },
+	{ -1, 8 },
+	{ 4, 8 },
+	{ 5, 8 },
+	{ 6, 8 }, /* UID */
+	{ -1, 8 },
+	{ 8, 8 },
+	{ 9, 8 },
+	{ 10, 8 },
+};
+
+struct s400_map_entry s400_api_mapping_table[] = {
+	{ 3, 11 }, /* 24 .. 34 */
+	{ 7, 8 },
+	{ 16, 11 }, /* 128 .. 143 */
+	{ 22, 8 },
+	{ 23, 8 },
+};
+#endif
 
 static s32 map_fsb_fuse_index(u32 bank, u32 word, bool *redundancy)
 {
@@ -128,7 +156,7 @@ int fuse_sense(u32 bank, u32 word, u32 *val)
 
 	word_index = map_fsb_fuse_index(bank, word, &redundancy);
 	if (word_index >= 0) {
-		*val = readl((ulong)FSB_BASE_ADDR + 0x800 + (word_index << 2));
+		*val = readl((ulong)FSB_BASE_ADDR + FSB_OTP_SHADOW + (word_index << 2));
 		if (redundancy)
 			*val = (*val >> ((word % 2) * 16)) & 0xFFFF;
 
-- 
2.36.0