/*
- * 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>
DECLARE_GLOBAL_DATA_PTR;
+static u32 get_boot_device(void)
+{
+ 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)
{
- /* Right now only booting via SPI NOR flash is supported */
- return BOOT_DEVICE_SPI;
+ return get_boot_device();
+}
+
+#ifdef CONFIG_SPL_MMC_SUPPORT
+u32 spl_boot_mode(void)
+{
+ return MMCSD_MODE_RAW;
}
+#endif
void board_init_f(ulong dummy)
{
- /* Set global data pointer */
- gd = &gdata;
+ int ret;
+
+ /*
+ * Pin muxing needs to be done before UART output, since
+ * on A38x the UART pins need some re-muxing for output
+ * to work.
+ */
+ board_early_init_f();
- /* Linux expects the internal registers to be at 0xf1000000 */
- arch_cpu_init();
+ /* 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();
+
+ /* Armada 375 does not support SerDes and DDR3 init yet */
+#if !defined(CONFIG_ARMADA_375)
/* First init the serdes PHY's */
serdes_phy_config();
/* Setup DDR */
ddr3_init();
+#endif
- 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();
}