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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 v2 05/19] ARM: i.MX: Simplify serial bootsource detection for i.MX6 and 7
Date: Mon, 16 Apr 2018 12:31:43 -0700	[thread overview]
Message-ID: <20180416193157.16094-6-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20180416193157.16094-1-andrew.smirnov@gmail.com>

The algorithm to detect serial mode can be shared between i.M6 and
i.MX7 as wall as simplified a bit by replacing swich goto/break/return
termination logic with more trivial if statements.

This commit also sets the stage for additional improvements in the
commits that follow.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 arch/arm/mach-imx/boot.c | 50 +++++++++++++++++++++++-------------------------
 1 file changed, 24 insertions(+), 26 deletions(-)

diff --git a/arch/arm/mach-imx/boot.c b/arch/arm/mach-imx/boot.c
index 9f5ddf629..dc385ceae 100644
--- a/arch/arm/mach-imx/boot.c
+++ b/arch/arm/mach-imx/boot.c
@@ -226,6 +226,18 @@ void imx53_get_boot_source(enum bootsource *src, int *instance)
 
 #define IMX6_SRC_SBMR1	0x04
 #define IMX6_SRC_SBMR2	0x1c
+#define IMX6_BMOD_SERIAL	0b01
+#define IMX6_BMOD_RESERVED	0b11
+
+static bool imx6_bootsource_reserved(uint32_t sbmr2)
+{
+	return imx53_get_bmod(sbmr2) == IMX6_BMOD_RESERVED;
+}
+
+static bool imx6_bootsource_serial(uint32_t sbmr2)
+{
+	return imx53_get_bmod(sbmr2) == IMX6_BMOD_SERIAL;
+}
 
 void imx6_get_boot_source(enum bootsource *src, int *instance)
 {
@@ -234,20 +246,13 @@ void imx6_get_boot_source(enum bootsource *src, int *instance)
 	uint32_t sbmr2 = readl(src_base + IMX6_SRC_SBMR2);
 	uint32_t boot_cfg_4_2_0;
 
-	switch (imx53_get_bmod(sbmr2)) {
-	case 0: /* Fuses, fall through */
-	case 2: /* internal boot */
-		goto internal_boot;
-	case 1: /* Serial Downloader */
-		*src = BOOTSOURCE_SERIAL;
-		break;
-	case 3: /* reserved */
-		break;
-	};
-
-	return;
+	if (imx6_bootsource_reserved(sbmr2))
+		return;
 
-internal_boot:
+	if (imx6_bootsource_serial(sbmr2)) {
+		*src = BOOTSOURCE_SERIAL;
+		return;
+	}
 
 	/* BOOT_CFG1[7:4] */
 	switch ((sbmr1 >> 4) & 0xf) {
@@ -295,20 +300,13 @@ void imx7_get_boot_source(enum bootsource *src, int *instance)
 	uint32_t sbmr1 = readl(src_base + IMX7_SRC_SBMR1);
 	uint32_t sbmr2 = readl(src_base + IMX7_SRC_SBMR2);
 
-	switch (imx53_get_bmod(sbmr2)) {
-	case 0: /* Fuses, fall through */
-	case 2: /* internal boot */
-		goto internal_boot;
-	case 1: /* Serial Downloader */
-		*src = BOOTSOURCE_SERIAL;
-		break;
-	case 3: /* reserved */
-		break;
-	};
-
-	return;
+	if (imx6_bootsource_reserved(sbmr2))
+		return;
 
-internal_boot:
+	if (imx6_bootsource_serial(sbmr2)) {
+		*src = BOOTSOURCE_SERIAL;
+		return;
+	}
 
 	switch ((sbmr1 >> 12) & 0xf) {
 	case 1:
-- 
2.14.3


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  parent reply	other threads:[~2018-04-16 19:32 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-16 19:31 [PATCH v2 00/19] i.MX bootsource bugfixes, refactoring and VFxxx support Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 01/19] ARM: i.MX: boot: Coalesce copy-pasted code Andrey Smirnov
2018-04-17  6:58   ` Sascha Hauer
2018-04-17 15:20     ` Andrey Smirnov
2018-04-18  8:15       ` Sascha Hauer
2018-04-19 22:26         ` Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 02/19] include: Port linux/build_bug.h from Linux kernel Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 03/19] include: Port linux/bitfield.h " Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 04/19] ARM: i.MX: Add a function to extract BMOD value Andrey Smirnov
2018-04-16 19:31 ` Andrey Smirnov [this message]
2018-04-16 19:31 ` [PATCH v2 06/19] ARM: i.MX: Account for unprogrammed fuses on i.MX6 and i.MX7 Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 07/19] ARM: i.MX7: boot: Add code to handle SD/MMC manufacture mode Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 08/19] ARM: i.MX7: boot: Remove incorrect NAND bootsource detection Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 09/19] ARM: i.MX7: boot: Fix SPI-NOR/QSPI boot source mixup Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 10/19] ARM: i.MX: boot: Remove unnecessary returns Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 11/19] ARM: i.MX: boot: Move magic values into small functions Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 12/19] ARM: i.MX: boot: Share code to detect NAND as a boot source Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 13/19] ARM: i.MX: boot: Check for NAND boot only if necessary on i.MX53, 6 Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 14/19] ARM: i.MX53: boot: Move magic numbers info utility functions Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 15/19] ARM: i.MX6: boot: Move magic numbers into " Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 16/19] ARM: i.MX7: " Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 17/19] bootsource: Add BOOTSOURCE_CAN Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 18/19] ARM: VFxxx: Implement code to detect bootsource Andrey Smirnov
2018-04-16 19:31 ` [PATCH v2 19/19] ARM: i.MX6: boot: Return BOOTSOURCE_SPI_NOR, not BOOTSOURCE_SPI Andrey Smirnov
2018-04-17  7:24 ` [PATCH v2 00/19] i.MX bootsource bugfixes, refactoring and VFxxx support Sascha Hauer

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