[PATCH v2 3/4] ARM: imx: Use correct U-Boot offset in case of secondary boot from eMMC
Marek Vasut
marex at denx.de
Mon Oct 16 18:16:14 CEST 2023
From: Fedor Ross <fedor.ross at ifm.com>
In case of a secondary image boot from the user area of an eMMC device,
the correct offset must be calculated. The offset is fused in the fuse
IMG_CNTN_SET1_OFFSET of the i.MX8M Nano and Plus. The calculation of the
offset is described in the reference manual (IMX8MNRM Rev. 2, 07/2022
and IMX8MPRM Rev. 1, 06/2021):
The fuse IMG_CNTN_SET1_OFFSET (0x490[22:19]) is defined as follows:
* Secondary boot is disabled if fuse value is bigger than 10,
n = fuse value bigger than 10.
* n == 0: Offset = 4MB
* n == 2: Offset = 1MB
* Others & n <= 10 : Offset = 1MB*2^n
Signed-off-by: Fedor Ross <fedor.ross at ifm.com>
Signed-off-by: Marek Vasut <marex at denx.de>
---
Cc: "NXP i.MX U-Boot Team" <uboot-imx at nxp.com>
Cc: "Ying-Chun Liu (PaulLiu)" <paul.liu at linaro.org>
Cc: Andre Przywara <andre.przywara at arm.com>
Cc: Chanho Park <chanho61.park at samsung.com>
Cc: Elena Popa <elena.popa at nxp.com>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Fedor Ross <fedor.ross at ifm.com>
Cc: Heinrich Schuchardt <xypron.glpk at gmx.de>
Cc: Hugo Villeneuve <hvilleneuve at dimonoff.com>
Cc: Jagan Teki <jagan at amarulasolutions.com>
Cc: Kever Yang <kever.yang at rock-chips.com>
Cc: Manoj Sai <abbaraju.manojsai at amarulasolutions.com>
Cc: Michal Simek <michal.simek at amd.com>
Cc: Neil Armstrong <neil.armstrong at linaro.org>
Cc: Peng Fan <peng.fan at nxp.com>
Cc: Qu Wenruo <wqu at suse.com>
Cc: Roger Quadros <rogerq at kernel.org>
Cc: Simon Glass <sjg at chromium.org>
Cc: Stefan Roese <sr at denx.de>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Tim Harvey <tharvey at gateworks.com>
---
V2: Use arch_spl_mmc_get_uboot_raw_sector()
---
arch/arm/mach-imx/imx8m/soc.c | 39 +++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c
index 930ee5f59f9..d33ac06cab4 100644
--- a/arch/arm/mach-imx/imx8m/soc.c
+++ b/arch/arm/mach-imx/imx8m/soc.c
@@ -28,8 +28,10 @@
#include <errno.h>
#include <fdt_support.h>
#include <fsl_wdog.h>
+#include <fuse.h>
#include <imx_sip.h>
#include <linux/bitops.h>
+#include <linux/bitfield.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -727,6 +729,43 @@ int spl_mmc_emmc_boot_partition(struct mmc *mmc)
}
#endif
+#if defined(CONFIG_IMX8MN) || defined(CONFIG_IMX8MP)
+#define IMG_CNTN_SET1_OFFSET GENMASK(22, 19)
+unsigned long arch_spl_mmc_get_uboot_raw_sector(struct mmc *mmc,
+ unsigned long raw_sect)
+{
+ u32 val, offset;
+
+ if (fuse_read(2, 1, &val)) {
+ debug("Error reading fuse!\n");
+ return raw_sect;
+ }
+
+ val = FIELD_GET(IMG_CNTN_SET1_OFFSET, val);
+ if (val > 10) {
+ debug("Secondary image boot disabled!\n");
+ return raw_sect;
+ }
+
+ if (val == 0)
+ offset = SZ_4M;
+ else if (val == 1)
+ offset = SZ_2M;
+ else if (val == 2)
+ offset = SZ_1M;
+ else /* flash.bin offset = 1 MiB * 2^n */
+ offset = SZ_1M << val;
+
+ offset /= 512;
+ offset -= CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET;
+
+ if (imx8m_detect_secondary_image_boot())
+ raw_sect += offset;
+
+ return raw_sect;
+}
+#endif
+
bool is_usb_boot(void)
{
return get_boot_device() == USB_BOOT;
--
2.42.0
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