X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Farm%2Fmach-mvebu%2Fspl.c;h=0879873b9725828c2fd5e4b20437de0f2d102b8a;hb=af0135928eea060422c61519f3bd5eec27fd0e56;hp=af61ded42efe070ffe6d3102748a69c2735f57d7;hpb=6f4e050639241218987541f4729172e4e0e2ff31;p=u-boot

diff --git a/arch/arm/mach-mvebu/spl.c b/arch/arm/mach-mvebu/spl.c
index af61ded42e..0879873b97 100644
--- a/arch/arm/mach-mvebu/spl.c
+++ b/arch/arm/mach-mvebu/spl.c
@@ -1,10 +1,13 @@
 /*
- * Copyright (C) 2014 Stefan Roese <sr@denx.de>
+ * Copyright (C) 2014-2016 Stefan Roese <sr@denx.de>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
+#include <dm.h>
+#include <debug_uart.h>
+#include <fdtdec.h>
 #include <spl.h>
 #include <asm/io.h>
 #include <asm/arch/cpu.h>
@@ -12,14 +15,45 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-u32 spl_boot_device(void)
+static u32 get_boot_device(void)
 {
-#if defined(CONFIG_SPL_SPI_FLASH_SUPPORT)
-	return BOOT_DEVICE_SPI;
-#endif
-#if defined(CONFIG_SPL_MMC_SUPPORT)
-	return BOOT_DEVICE_MMC1;
+	u32 val;
+	u32 boot_device;
+
+	/*
+	 * First check, if UART boot-mode is active. This can only
+	 * be done, via the bootrom error register. Here the
+	 * MSB marks if the UART mode is active.
+	 */
+	val = readl(CONFIG_BOOTROM_ERR_REG);
+	boot_device = (val & BOOTROM_ERR_MODE_MASK) >> BOOTROM_ERR_MODE_OFFS;
+	debug("BOOTROM_REG=0x%08x boot_device=0x%x\n", val, boot_device);
+	if (boot_device == BOOTROM_ERR_MODE_UART)
+		return BOOT_DEVICE_UART;
+
+	/*
+	 * Now check the SAR register for the strapped boot-device
+	 */
+	val = readl(CONFIG_SAR_REG);	/* SAR - Sample At Reset */
+	boot_device = (val & BOOT_DEV_SEL_MASK) >> BOOT_DEV_SEL_OFFS;
+	debug("SAR_REG=0x%08x boot_device=0x%x\n", val, boot_device);
+	switch (boot_device) {
+#ifdef CONFIG_SPL_MMC_SUPPORT
+	case BOOT_FROM_MMC:
+	case BOOT_FROM_MMC_ALT:
+		return BOOT_DEVICE_MMC1;
 #endif
+	case BOOT_FROM_UART:
+		return BOOT_DEVICE_UART;
+	case BOOT_FROM_SPI:
+	default:
+		return BOOT_DEVICE_SPI;
+	};
+}
+
+u32 spl_boot_device(void)
+{
+	return get_boot_device();
 }
 
 #ifdef CONFIG_SPL_MMC_SUPPORT
@@ -31,11 +65,7 @@ u32 spl_boot_mode(void)
 
 void board_init_f(ulong dummy)
 {
-	/* Set global data pointer */
-	gd = &gdata;
-
-	/* Linux expects the internal registers to be at 0xf1000000 */
-	arch_cpu_init();
+	int ret;
 
 	/*
 	 * Pin muxing needs to be done before UART output, since
@@ -44,6 +74,27 @@ void board_init_f(ulong dummy)
 	 */
 	board_early_init_f();
 
+	/* Example code showing how to enable the debug UART on MVEBU */
+#ifdef EARLY_UART
+	/*
+	 * Debug UART can be used from here if required:
+	 *
+	 * debug_uart_init();
+	 * printch('a');
+	 * printhex8(0x1234);
+	 * printascii("string");
+	 */
+#endif
+
+	ret = spl_init();
+	if (ret) {
+		debug("spl_init() failed: %d\n", ret);
+		hang();
+	}
+
+	/* Use special translation offset for SPL */
+	dm_set_translation_offset(0xd0000000 - 0xf1000000);
+
 	preloader_console_init();
 
 	timer_init();
@@ -54,5 +105,17 @@ void board_init_f(ulong dummy)
 	/* Setup DDR */
 	ddr3_init();
 
-	board_init_r(NULL, 0);
+	/*
+	 * Return to the BootROM to continue the Marvell xmodem
+	 * UART boot protocol. As initiated by the kwboot tool.
+	 *
+	 * This can only be done by the BootROM and not by the
+	 * U-Boot SPL infrastructure, since the beginning of the
+	 * image is already read and interpreted by the BootROM.
+	 * SPL has no chance to receive this information. So we
+	 * need to return to the BootROM to enable this xmodem
+	 * UART download.
+	 */
+	if (get_boot_device() == BOOT_DEVICE_UART)
+		return_to_bootrom();
 }