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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH 04/17] ARM: i.MX: Account for unprogrammed fuses on i.MX6 and i.MX7
Date: Sat, 14 Apr 2018 10:50:50 -0700	[thread overview]
Message-ID: <20180414175103.10125-5-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20180414175103.10125-1-andrew.smirnov@gmail.com>

On both i.MX6 and i.MX7 (also true for VFxxx) there's an additional
path that leads mask ROM to switch into serial bootloader mode. Add
code to support it.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 arch/arm/mach-imx/boot.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-imx/boot.c b/arch/arm/mach-imx/boot.c
index 7eb7a16f3..a98c716fb 100644
--- a/arch/arm/mach-imx/boot.c
+++ b/arch/arm/mach-imx/boot.c
@@ -231,6 +231,8 @@ void imx53_get_boot_source(enum bootsource *src, int *instance)
 #define IMX6_SRC_SBMR2	0x1c
 #define IMX6_BMOD_SERIAL	0b01
 #define IMX6_BMOD_RESERVED	0b11
+#define IMX6_BMOD_FUSES		0b00
+#define BT_FUSE_SEL		BIT(4)
 
 static bool imx6_bootsource_reserved(uint32_t sbmr2)
 {
@@ -239,7 +241,14 @@ static bool imx6_bootsource_reserved(uint32_t sbmr2)
 
 static bool imx6_bootsource_serial(uint32_t sbmr2)
 {
-	return imx53_get_bmod(sbmr2) == IMX6_BMOD_SERIAL;
+	return imx53_get_bmod(sbmr2) == IMX6_BMOD_SERIAL ||
+		/*
+		 * If boot from fuses is selected and fuses are not
+		 * programmed by setting BT_FUSE_SEL, ROM code will
+		 * fallback to serial mode
+		 */
+	       (imx53_get_bmod(sbmr2) == IMX6_BMOD_FUSES &&
+		!(sbmr2 & BT_FUSE_SEL));
 }
 
 void imx6_get_boot_source(enum bootsource *src, int *instance)
-- 
2.14.3


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  parent reply	other threads:[~2018-04-14 17:51 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-14 17:50 [PATCH 00/17] i.MX bootsource bugfixes, refactoring and VFxxx support Andrey Smirnov
2018-04-14 17:50 ` [PATCH 01/17] ARM: i.MX: boot: Coalesce copy-pasted code Andrey Smirnov
2018-04-14 17:50 ` [PATCH 02/17] ARM: i.MX: Add function to extract BMOD value Andrey Smirnov
2018-04-16  7:37   ` Sascha Hauer
2018-04-16 13:36     ` Andrey Smirnov
2018-04-14 17:50 ` [PATCH 03/17] ARM: i.MX: Simplify serial bootsource detection for i.MX6 and 7 Andrey Smirnov
2018-04-14 17:50 ` Andrey Smirnov [this message]
2018-04-14 17:50 ` [PATCH 05/17] ARM: i.MX7: boot: Add code to handle SD/MMC manufacture mode Andrey Smirnov
2018-04-14 17:50 ` [PATCH 06/17] ARM: i.MX7: boot: Remove incorrect NAND bootsource detection Andrey Smirnov
2018-04-14 17:50 ` [PATCH 07/17] ARM: i.MX7: boot: Fix SPI-NOR/QSPI boot source mixup Andrey Smirnov
2018-04-14 17:50 ` [PATCH 08/17] ARM: i.MX: boot: Remove unnecessary retruns Andrey Smirnov
2018-04-15  2:22   ` Marc Reilly
2018-04-16 16:34     ` Andrey Smirnov
2018-04-14 17:50 ` [PATCH 09/17] ARM: i.MX: boot: Move magic values into small functions Andrey Smirnov
2018-04-15  2:24   ` Marc Reilly
2018-04-16 16:33     ` Andrey Smirnov
2018-04-14 17:50 ` [PATCH 10/17] ARM: i.MX: boot: Share code to detect NAND as a boot source Andrey Smirnov
2018-04-14 17:50 ` [PATCH 11/17] ARM: i.MX: boot: Check for NAND boot only if necessary on i.MX53, 6 Andrey Smirnov
2018-04-14 17:50 ` [PATCH 12/17] ARM: i.MX53: boot: Move magic numbers info utility functions Andrey Smirnov
2018-04-14 17:50 ` [PATCH 13/17] ARM: i.MX6: boot: Move magic numbers into " Andrey Smirnov
2018-04-14 17:51 ` [PATCH 14/17] ARM: i.MX7: " Andrey Smirnov
2018-04-14 17:51 ` [PATCH 15/17] bootsource: Add BOOTSOURCE_CAN Andrey Smirnov
2018-04-14 17:51 ` [PATCH 16/17] ARM: VFxxx: Implement code to detect bootsource Andrey Smirnov
2018-04-14 17:51 ` [PATCH 17/17] ARM: i.MX6: boot: Return BOOTSOURCE_SPI_NOR, not BOOTSOURCE_SPI Andrey Smirnov

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