imx: mx7: SPL support for i.MX7

Add configuration file and spl_boot_device function for the i.MX7 SPL.

Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>

arch/arm/include/asm/arch-mx7/sys_proto.h

@@ -7,3 +7,4 @@
 #include <asm/mach-imx/sys_proto.h>
 
 void set_wdog_reset(struct wdog_regs *wdog);
+enum boot_device get_boot_device(void);

arch/arm/mach-imx/spl.c

@@ -14,6 +14,7 @@
 #include <asm/spl.h>
 #include <spl.h>
 #include <asm/mach-imx/hab.h>
+#include <asm/mach-imx/boot_mode.h>
 #include <g_dnl.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -96,6 +97,27 @@ u32 spl_boot_device(void)
 	return BOOT_DEVICE_NONE;
 }
 
+#elif defined(CONFIG_MX7)
+/* Translate iMX7 boot device to the SPL boot device enumeration */
+u32 spl_boot_device(void)
+{
+	enum boot_device boot_device_spl = get_boot_device();
+
+	switch (boot_device_spl) {
+	case SD1_BOOT:
+	case MMC1_BOOT:
+		return BOOT_DEVICE_MMC1;
+	case SD2_BOOT:
+	case MMC2_BOOT:
+		return BOOT_DEVICE_MMC2;
+	case SPI_NOR_BOOT:
+		return BOOT_DEVICE_SPI;
+	default:
+		return BOOT_DEVICE_NONE;
+	}
+}
+#endif /* CONFIG_MX6 || CONFIG_MX7 */
+
 #ifdef CONFIG_SPL_USB_GADGET_SUPPORT
 int g_dnl_bind_fixup(struct usb_device_descriptor *dev, const char *name)
 {
@@ -104,7 +126,6 @@ int g_dnl_bind_fixup(struct usb_device_descriptor *dev, const char *name)
 	return 0;
 }
 #endif
-#endif
 
 #if defined(CONFIG_SPL_MMC_SUPPORT)
 /* called from spl_mmc to see type of boot mode for storage (RAW or FAT) */

include/configs/imx7_spl.h

+/*
+ * SPL definitions for the i.MX7 SPL
+ *
+ * (C) Copyright 2017 CompuLab, Ltd. http://www.compulab.com
+ *
+ * Author: Uri Mashiach <uri.mashiach@compulab.co.il>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __IMX7_SPL_CONFIG_H
+#define __IMX7_SPL_CONFIG_H
+
+#ifdef CONFIG_SPL
+
+#define CONFIG_SPL_FRAMEWORK
+
+/*
+ * see figure 6-22 in i.MX 7Dual/Solo Reference manuals:
+ *  - IMX7D/S OCRAM free area RAM (OCRAM) is from 0x00910000 to
+ *    0x00946C00.
+ *  - Set the stack at the end of the free area section, at 0x00946BB8.
+ *  - The BOOT ROM loads what they consider the firmware image
+ *    which consists of a 4K header in front of us that contains the IVT, DCD
+ *    and some padding thus 'our' max size is really 0x00946BB8 - 0x00911000.
+ *    64KB is more then enough for the SPL.
+ */
+#define CONFIG_SPL_TEXT_BASE		0x00911000
+#define CONFIG_SPL_MAX_SIZE		0x10000
+#define CONFIG_SPL_STACK		0x00946BB8
+/*
+ * Pad SPL to 68KB (4KB header + 64KB max size). This allows to write the
+ * SPL/U-Boot combination generated with u-boot-with-spl.imx directly to a
+ * boot media (given that boot media specific offset is configured properly).
+ */
+#define CONFIG_SPL_PAD_TO		0x11000
+
+/* MMC support */
+#if defined(CONFIG_SPL_MMC_SUPPORT)
+#define CONFIG_SYS_MMCSD_FS_BOOT_PARTITION	1
+#define CONFIG_SYS_MONITOR_LEN			409600	/* 400 KB */
+#endif
+
+/* SATA support */
+#if defined(CONFIG_SPL_SATA_SUPPORT)
+#define CONFIG_SPL_SATA_BOOT_DEVICE		0
+#define CONFIG_SYS_SATA_FAT_BOOT_PARTITION	1
+#endif
+
+/* Define the payload for FAT/EXT support */
+#if defined(CONFIG_SPL_FAT_SUPPORT) || defined(CONFIG_SPL_EXT_SUPPORT)
+# ifdef CONFIG_OF_CONTROL
+#  define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME	"u-boot-dtb.img"
+# else
+#  define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME	"u-boot.img"
+# endif
+#endif
+
+#define CONFIG_SPL_BSS_START_ADDR      0x88200000
+#define CONFIG_SPL_BSS_MAX_SIZE        0x100000		/* 1 MB */
+#define CONFIG_SYS_SPL_MALLOC_START    0x88300000
+#define CONFIG_SYS_SPL_MALLOC_SIZE     0x100000		/* 1 MB */
+#define CONFIG_SYS_TEXT_BASE           0x87800000
+
+#endif /* CONFIG_SPL */
+
+#endif /* __IMX7_SPL_CONFIG_H */