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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 05/17] ARM: i.MX7: boot: Add code to handle SD/MMC manufacture mode
Date: Sat, 14 Apr 2018 10:50:51 -0700	[thread overview]
Message-ID: <20180414175103.10125-6-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20180414175103.10125-1-andrew.smirnov@gmail.com>

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 arch/arm/mach-imx/boot.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/arch/arm/mach-imx/boot.c b/arch/arm/mach-imx/boot.c
index a98c716fb..4082f46ae 100644
--- a/arch/arm/mach-imx/boot.c
+++ b/arch/arm/mach-imx/boot.c
@@ -306,6 +306,19 @@ void imx6_get_boot_source(enum bootsource *src, int *instance)
 #define IMX7_SRC_SBMR1	0x58
 #define IMX7_SRC_SBMR2	0x70
 
+#define IMX_BOOT_SW_INFO_POINTER_ADDR	0x000001E8
+#define IMX_BOOT_SW_INFO_BDT_SD		0x1
+
+struct imx_boot_sw_info {
+	uint8_t  reserved_1;
+	uint8_t  boot_device_instance;
+	uint8_t  boot_device_type;
+	uint8_t  reserved_2;
+	uint32_t frequency_hz[4]; /* Various frequencies (ARM, AXI,
+				   * DDR, etc.). Not used */
+	uint32_t reserved_3[3];
+} __packed;
+
 void imx7_get_boot_source(enum bootsource *src, int *instance)
 {
 	void __iomem *src_base = IOMEM(MX7_SRC_BASE_ADDR);
@@ -316,6 +329,33 @@ void imx7_get_boot_source(enum bootsource *src, int *instance)
 		return;
 
 	if (imx6_bootsource_serial(sbmr2)) {
+		/*
+		 * On i.MX7 ROM code will try to bood from uSDHC1
+		 * before entering serial mode. It doesn't seem to be
+		 * reflected in the contents of SBMR1 in any way when
+		 * that happens, so we check "Boot_SW_Info" structure
+		 * (per 6.6.14 Boot information for software) to see
+		 * if that really happened.
+		 *
+		 * FIXME: This behaviour can be inhibited by
+		 * DISABLE_SDMMC_MFG, but location of that fuse
+		 * doesn't seem to be documented anywhere. Once that
+		 * is known it should be taken into account here.
+		 */
+		const struct imx_boot_sw_info *info;
+
+		info = (const void *)readl(IMX_BOOT_SW_INFO_POINTER_ADDR);
+
+		if (info->boot_device_type == IMX_BOOT_SW_INFO_BDT_SD) {
+			*src = BOOTSOURCE_MMC;
+			/*
+			 * We are expecting to only ever boot from
+			 * uSDHC1 here
+			 */
+			WARN_ON(*instance = info->boot_device_instance);
+			return;
+		}
+
 		*src = BOOTSOURCE_SERIAL;
 		return;
 	}
-- 
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 ` [PATCH 04/17] ARM: i.MX: Account for unprogrammed fuses on i.MX6 and i.MX7 Andrey Smirnov
2018-04-14 17:50 ` Andrey Smirnov [this message]
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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