xref: /openbmc/u-boot/arch/arm/mach-mvebu/spl.c (revision 856b30da)
1 /*
2  * Copyright (C) 2014 Stefan Roese <sr@denx.de>
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <spl.h>
9 #include <asm/io.h>
10 #include <asm/arch/cpu.h>
11 #include <asm/arch/soc.h>
12 
13 DECLARE_GLOBAL_DATA_PTR;
14 
15 u32 spl_boot_device(void)
16 {
17 #if defined(CONFIG_SPL_SPI_FLASH_SUPPORT)
18 	return BOOT_DEVICE_SPI;
19 #endif
20 #if defined(CONFIG_SPL_MMC_SUPPORT)
21 	return BOOT_DEVICE_MMC1;
22 #endif
23 }
24 
25 #ifdef CONFIG_SPL_MMC_SUPPORT
26 u32 spl_boot_mode(void)
27 {
28 	return MMCSD_MODE_RAW;
29 }
30 #endif
31 
32 void board_init_f(ulong dummy)
33 {
34 #ifndef CONFIG_MVEBU_BOOTROM_UARTBOOT
35 	/*
36 	 * Only call arch_cpu_init() when not returning to the
37 	 * Marvell BootROM, which is done when booting via
38 	 * the xmodem protocol (kwboot tool). Otherwise the
39 	 * internal register will get remapped and the BootROM
40 	 * can't continue to run correctly.
41 	 */
42 
43 	/* Linux expects the internal registers to be at 0xf1000000 */
44 	arch_cpu_init();
45 #endif
46 
47 	/*
48 	 * Pin muxing needs to be done before UART output, since
49 	 * on A38x the UART pins need some re-muxing for output
50 	 * to work.
51 	 */
52 	board_early_init_f();
53 
54 	preloader_console_init();
55 
56 	timer_init();
57 
58 	/* First init the serdes PHY's */
59 	serdes_phy_config();
60 
61 	/* Setup DDR */
62 	ddr3_init();
63 
64 #ifdef CONFIG_MVEBU_BOOTROM_UARTBOOT
65 	/*
66 	 * Return to the BootROM to continue the Marvell xmodem
67 	 * UART boot protocol. As initiated by the kwboot tool.
68 	 *
69 	 * This can only be done by the BootROM and not by the
70 	 * U-Boot SPL infrastructure, since the beginning of the
71 	 * image is already read and interpreted by the BootROM.
72 	 * SPL has no chance to receive this information. So we
73 	 * need to return to the BootROM to enable this xmodem
74 	 * UART download.
75 	 */
76 	return_to_bootrom();
77 #endif
78 }
79