[U-Boot] [PATCH v4 03/15] imx: Use IMX6_BMODE_* macros instead of numericals

[Jagan Teki]

Use meaningful macros IMX6_BMODE_*, instead of numerical
number in boot mode detection code.

Cc: Tim Harvey <tharvey at gateworks.com>
Acked-by: Stefano Babic <sbabic at denx.de>
Signed-off-by: Jagan Teki <jagan at openedev.com>
---
Changes for v4:
- Add IMX6_BMODE_UART macro for uart bootmode
- Remove value assignment in enum, since all enum list is order
Changes for v3:
- Update IMX6_BMODE_* shift macros with real number instead of bitops
- %s/IMX6_BMODE_SERIAL/IMX6_BMODE_SERIAL_ROM
- Assign enums with numbers so-that it can easy to see same in RM

 arch/arm/imx-common/spl.c                   | 40 ++++++++++++++++++-----------
 arch/arm/include/asm/imx-common/sys_proto.h | 35 +++++++++++++++++++++++++
 2 files changed, 60 insertions(+), 15 deletions(-)

diff --git a/arch/arm/imx-common/spl.c b/arch/arm/imx-common/spl.c
index 81fc0ca..614e05c 100644
--- a/arch/arm/imx-common/spl.c
+++ b/arch/arm/imx-common/spl.c
@@ -29,42 +29,52 @@ u32 spl_boot_device(void)
 	 */
 	if (((bmode >> 24) & 0x03) == 0x01) /* Serial Downloader */
 		return BOOT_DEVICE_UART;
+
 	/* BOOT_CFG1[7:4] - see IMX6DQRM Table 8-8 */
-	switch ((reg & 0x000000FF) >> 4) {
+	switch ((reg & IMX6_BMODE_MASK) >> IMX6_BMODE_SHIFT) {
 	 /* EIM: See 8.5.1, Table 8-9 */
-	case 0x0:
+	case IMX6_BMODE_EMI:
 		/* BOOT_CFG1[3]: NOR/OneNAND Selection */
-		if ((reg & 0x00000008) >> 3)
+		switch ((reg & IMX6_BMODE_EMI_MASK) >> IMX6_BMODE_EMI_SHIFT) {
+		case IMX6_BMODE_ONENAND:
 			return BOOT_DEVICE_ONENAND;
-		else
+		case IMX6_BMODE_NOR:
 			return BOOT_DEVICE_NOR;
 		break;
+		}
 	/* Reserved: Used to force Serial Downloader */
-	case 0x1:
+	case IMX6_BMODE_UART:
 		return BOOT_DEVICE_UART;
 	/* SATA: See 8.5.4, Table 8-20 */
-	case 0x2:
+	case IMX6_BMODE_SATA:
 		return BOOT_DEVICE_SATA;
 	/* Serial ROM: See 8.5.5.1, Table 8-22 */
-	case 0x3:
+	case IMX6_BMODE_SERIAL_ROM:
 		/* BOOT_CFG4[2:0] */
-		switch ((reg & 0x07000000) >> 24) {
-		case 0x0 ... 0x4:
+		switch ((reg & IMX6_BMODE_SERIAL_ROM_MASK) >>
+			IMX6_BMODE_SERIAL_ROM_SHIFT) {
+		case IMX6_BMODE_ECSPI1:
+		case IMX6_BMODE_ECSPI2:
+		case IMX6_BMODE_ECSPI3:
+		case IMX6_BMODE_ECSPI4:
+		case IMX6_BMODE_ECSPI5:
 			return BOOT_DEVICE_SPI;
-		case 0x5 ... 0x7:
+		case IMX6_BMODE_I2C1:
+		case IMX6_BMODE_I2C2:
+		case IMX6_BMODE_I2C3:
 			return BOOT_DEVICE_I2C;
 		}
 		break;
 	/* SD/eSD: 8.5.3, Table 8-15  */
-	case 0x4:
-	case 0x5:
+	case IMX6_BMODE_SD:
+	case IMX6_BMODE_ESD:
 		return BOOT_DEVICE_MMC1;
 	/* MMC/eMMC: 8.5.3 */
-	case 0x6:
-	case 0x7:
+	case IMX6_BMODE_MMC:
+	case IMX6_BMODE_EMMC:
 		return BOOT_DEVICE_MMC1;
 	/* NAND Flash: 8.5.2, Table 8-10 */
-	case 0x8:
+	case IMX6_BMODE_NAND:
 		return BOOT_DEVICE_NAND;
 	}
 	return BOOT_DEVICE_NONE;
diff --git a/arch/arm/include/asm/imx-common/sys_proto.h b/arch/arm/include/asm/imx-common/sys_proto.h
index 99e3869..e09caeb 100644
--- a/arch/arm/include/asm/imx-common/sys_proto.h
+++ b/arch/arm/include/asm/imx-common/sys_proto.h
@@ -42,6 +42,41 @@
 #ifdef CONFIG_MX6
 #define IMX6_SRC_GPR10_BMODE		BIT(28)
 
+#define IMX6_BMODE_MASK			GENMASK(7, 0)
+#define	IMX6_BMODE_SHIFT		4
+#define IMX6_BMODE_EMI_MASK		BIT(3)
+#define IMX6_BMODE_EMI_SHIFT		3
+#define IMX6_BMODE_SERIAL_ROM_MASK	GENMASK(26, 24)
+#define IMX6_BMODE_SERIAL_ROM_SHIFT	24
+
+enum imx6_bmode_serial_rom {
+	IMX6_BMODE_ECSPI1,
+	IMX6_BMODE_ECSPI2,
+	IMX6_BMODE_ECSPI3,
+	IMX6_BMODE_ECSPI4,
+	IMX6_BMODE_ECSPI5,
+	IMX6_BMODE_I2C1,
+	IMX6_BMODE_I2C2,
+	IMX6_BMODE_I2C3,
+};
+
+enum imx6_bmode_emi {
+	IMX6_BMODE_ONENAND,
+	IMX6_BMODE_NOR,
+};
+
+enum imx6_bmode {
+	IMX6_BMODE_EMI,
+	IMX6_BMODE_UART,
+	IMX6_BMODE_SATA,
+	IMX6_BMODE_SERIAL_ROM,
+	IMX6_BMODE_SD,
+	IMX6_BMODE_ESD,
+	IMX6_BMODE_MMC,
+	IMX6_BMODE_EMMC,
+	IMX6_BMODE_NAND,
+};
+
 static inline u8 imx6_is_bmode_from_gpr9(void)
 {
 	struct src *psrc = (struct src *)SRC_BASE_ADDR;
-- 
1.9.1