[PATCH] imx9: scmi: Support iMX95/94/952 secondary boot

[Ye Li]

When ROM boots from secondary container set, SPL should select
correct offset to load u-boot-atf container.
The implementation uses ROM passover information:
1) For non-eMMC boot partition device, use image offset in ROM
   passover data to get u-boot-atf container offset.
2) For eMMC boot partition device, use boot stage (secondary)
   in ROM passover data to select correct eMMC boot partition
   for u-boot-atf container.

Signed-off-by: Ye Li <ye.li at nxp.com>
---
 arch/arm/include/asm/arch-imx9/sys_proto.h |  4 ++-
 arch/arm/mach-imx/image-container.c        | 27 ++++++++++++-------
 arch/arm/mach-imx/imx9/scmi/soc.c          | 30 +++++++++++++++++++---
 3 files changed, 47 insertions(+), 14 deletions(-)

diff --git a/arch/arm/include/asm/arch-imx9/sys_proto.h b/arch/arm/include/asm/arch-imx9/sys_proto.h
index 73df8715f22..b5e7d7d6855 100644
--- a/arch/arm/include/asm/arch-imx9/sys_proto.h
+++ b/arch/arm/include/asm/arch-imx9/sys_proto.h
@@ -23,7 +23,9 @@ int low_drive_freq_update(void *blob);
 enum imx9_soc_voltage_mode soc_target_voltage_mode(void);
 int get_reset_reason(bool sys, bool lm);
 
-u8 imx95_detect_secondary_image_boot(void);
+int scmi_get_boot_device_offset(unsigned long *img_off);
+int scmi_get_boot_stage(u8 *stage);
+u8 scmi_get_imgset_sel(void);
 
 #define is_voltage_mode(mode) (soc_target_voltage_mode() == (mode))
 
diff --git a/arch/arm/mach-imx/image-container.c b/arch/arm/mach-imx/image-container.c
index 63cf8596316..bdb43d138f2 100644
--- a/arch/arm/mach-imx/image-container.c
+++ b/arch/arm/mach-imx/image-container.c
@@ -225,15 +225,9 @@ static bool check_secondary_cnt_set(unsigned long *set_off)
 			}
 		}
 	}
-#elif IS_ENABLED(CONFIG_IMX95)
-	u8 img_set_sel = imx95_detect_secondary_image_boot();
-
-	*set_off = img_set_sel ? 0x400000 : 0;
+#endif
 
-	return !!img_set_sel;
-#else
 	return false;
-#endif
 }
 
 static unsigned long get_boot_device_offset(void *dev, int dev_type)
@@ -246,6 +240,14 @@ static unsigned long get_boot_device_offset(void *dev, int dev_type)
 		return offset;
 	}
 
+#if IS_ENABLED(CONFIG_ARCH_IMX9) && IS_ENABLED(CONFIG_SCMI_FIRMWARE)
+	int ret;
+	ret = scmi_get_boot_device_offset(&offset);
+	if (!ret)
+		return offset;
+	/* fall back to boot from primary set if get rom passover failed */
+#endif
+
 	sec_boot = check_secondary_cnt_set(&sec_set_off);
 	if (sec_boot)
 		printf("Secondary set selected\n");
@@ -372,10 +374,17 @@ int spl_mmc_emmc_boot_partition(struct mmc *mmc)
 
 	part = EXT_CSD_EXTRACT_BOOT_PART(mmc->part_config);
 	if (part == EMMC_BOOT_PART_BOOT1 || part == EMMC_BOOT_PART_BOOT2) {
-		unsigned long sec_set_off = 0;
 		bool sec_boot = false;
-
+#if IS_ENABLED(CONFIG_ARCH_IMX9) && IS_ENABLED(CONFIG_SCMI_FIRMWARE)
+		u8 stage;
+		int ret;
+		ret = scmi_get_boot_stage(&stage);
+		if (!ret)
+			sec_boot = (stage == 0x9);
+#else
+		unsigned long sec_set_off = 0;
 		sec_boot = check_secondary_cnt_set(&sec_set_off);
+#endif
 		if (sec_boot)
 			part = (part == EMMC_BOOT_PART_BOOT1) ? EMMC_HWPART_BOOT2 : EMMC_HWPART_BOOT1;
 	} else if (part == EMMC_BOOT_PART_USER) {
diff --git a/arch/arm/mach-imx/imx9/scmi/soc.c b/arch/arm/mach-imx/imx9/scmi/soc.c
index 47e8fc247df..60fdd577f55 100644
--- a/arch/arm/mach-imx/imx9/scmi/soc.c
+++ b/arch/arm/mach-imx/imx9/scmi/soc.c
@@ -745,8 +745,31 @@ void build_info(void)
 	puts("\n");
 }
 
-#if IS_ENABLED(CONFIG_IMX95)
-u8 imx95_detect_secondary_image_boot(void)
+int scmi_get_boot_device_offset(unsigned long *img_off)
+{
+	int ret;
+	rom_passover_t rom_data = {0};
+
+	ret = scmi_get_rom_data(&rom_data);
+	if (!ret)
+		*img_off = rom_data.img_ofs;
+
+	return 0;
+}
+
+int scmi_get_boot_stage(u8 *stage)
+{
+	int ret;
+	rom_passover_t rom_data = {0};
+
+	ret = scmi_get_rom_data(&rom_data);
+	if (!ret)
+		*stage = rom_data.boot_stage;
+
+	return ret;
+}
+
+u8 scmi_get_imgset_sel(void)
 {
 	rom_passover_t rdata = { 0 };
 	int ret = scmi_get_rom_data(&rdata);
@@ -759,9 +782,8 @@ u8 imx95_detect_secondary_image_boot(void)
 
 int boot_mode_getprisec(void)
 {
-	return !!imx95_detect_secondary_image_boot();
+	return !!scmi_get_imgset_sel();
 }
-#endif
 
 int arch_misc_init(void)
 {
-- 
2.37.1