1 /* 2 * Copyright (C) 2014-2016 Stefan Roese <sr@denx.de> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <dm.h> 9 #include <debug_uart.h> 10 #include <fdtdec.h> 11 #include <spl.h> 12 #include <asm/io.h> 13 #include <asm/arch/cpu.h> 14 #include <asm/arch/soc.h> 15 16 static u32 get_boot_device(void) 17 { 18 u32 val; 19 u32 boot_device; 20 21 /* 22 * First check, if UART boot-mode is active. This can only 23 * be done, via the bootrom error register. Here the 24 * MSB marks if the UART mode is active. 25 */ 26 val = readl(CONFIG_BOOTROM_ERR_REG); 27 boot_device = (val & BOOTROM_ERR_MODE_MASK) >> BOOTROM_ERR_MODE_OFFS; 28 debug("BOOTROM_REG=0x%08x boot_device=0x%x\n", val, boot_device); 29 if (boot_device == BOOTROM_ERR_MODE_UART) 30 return BOOT_DEVICE_UART; 31 32 /* 33 * Now check the SAR register for the strapped boot-device 34 */ 35 val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */ 36 boot_device = (val & BOOT_DEV_SEL_MASK) >> BOOT_DEV_SEL_OFFS; 37 debug("SAR_REG=0x%08x boot_device=0x%x\n", val, boot_device); 38 switch (boot_device) { 39 #ifdef CONFIG_SPL_MMC_SUPPORT 40 case BOOT_FROM_MMC: 41 case BOOT_FROM_MMC_ALT: 42 return BOOT_DEVICE_MMC1; 43 #endif 44 case BOOT_FROM_UART: 45 #ifdef BOOT_FROM_UART_ALT 46 case BOOT_FROM_UART_ALT: 47 #endif 48 return BOOT_DEVICE_UART; 49 case BOOT_FROM_SPI: 50 default: 51 return BOOT_DEVICE_SPI; 52 }; 53 } 54 55 u32 spl_boot_device(void) 56 { 57 return get_boot_device(); 58 } 59 60 #ifdef CONFIG_SPL_MMC_SUPPORT 61 u32 spl_boot_mode(const u32 boot_device) 62 { 63 return MMCSD_MODE_RAW; 64 } 65 #endif 66 67 void board_init_f(ulong dummy) 68 { 69 int ret; 70 71 /* 72 * Pin muxing needs to be done before UART output, since 73 * on A38x the UART pins need some re-muxing for output 74 * to work. 75 */ 76 board_early_init_f(); 77 78 /* Example code showing how to enable the debug UART on MVEBU */ 79 #ifdef EARLY_UART 80 /* 81 * Debug UART can be used from here if required: 82 * 83 * debug_uart_init(); 84 * printch('a'); 85 * printhex8(0x1234); 86 * printascii("string"); 87 */ 88 #endif 89 90 ret = spl_init(); 91 if (ret) { 92 debug("spl_init() failed: %d\n", ret); 93 hang(); 94 } 95 96 /* Use special translation offset for SPL */ 97 dm_set_translation_offset(0xd0000000 - 0xf1000000); 98 99 preloader_console_init(); 100 101 timer_init(); 102 103 /* Armada 375 does not support SerDes and DDR3 init yet */ 104 #if !defined(CONFIG_ARMADA_375) 105 /* First init the serdes PHY's */ 106 serdes_phy_config(); 107 108 /* Setup DDR */ 109 ddr3_init(); 110 #endif 111 112 /* 113 * Return to the BootROM to continue the Marvell xmodem 114 * UART boot protocol. As initiated by the kwboot tool. 115 * 116 * This can only be done by the BootROM and not by the 117 * U-Boot SPL infrastructure, since the beginning of the 118 * image is already read and interpreted by the BootROM. 119 * SPL has no chance to receive this information. So we 120 * need to return to the BootROM to enable this xmodem 121 * UART download. 122 */ 123 if (get_boot_device() == BOOT_DEVICE_UART) 124 return_to_bootrom(); 125 } 126