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 defined(CONFIG_ARMADA_38X) 30 /* 31 * If the bootrom error register contains any else than zeros 32 * in the first 8 bits it's an error condition. And in that case 33 * try to boot from UART. 34 */ 35 if (boot_device) 36 #else 37 if (boot_device == BOOTROM_ERR_MODE_UART) 38 #endif 39 return BOOT_DEVICE_UART; 40 41 /* 42 * Now check the SAR register for the strapped boot-device 43 */ 44 val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */ 45 boot_device = (val & BOOT_DEV_SEL_MASK) >> BOOT_DEV_SEL_OFFS; 46 debug("SAR_REG=0x%08x boot_device=0x%x\n", val, boot_device); 47 switch (boot_device) { 48 #if defined(CONFIG_ARMADA_38X) 49 case BOOT_FROM_NAND: 50 return BOOT_DEVICE_NAND; 51 #endif 52 #ifdef CONFIG_SPL_MMC_SUPPORT 53 case BOOT_FROM_MMC: 54 case BOOT_FROM_MMC_ALT: 55 return BOOT_DEVICE_MMC1; 56 #endif 57 case BOOT_FROM_UART: 58 #ifdef BOOT_FROM_UART_ALT 59 case BOOT_FROM_UART_ALT: 60 #endif 61 return BOOT_DEVICE_UART; 62 case BOOT_FROM_SPI: 63 default: 64 return BOOT_DEVICE_SPI; 65 }; 66 } 67 68 u32 spl_boot_device(void) 69 { 70 return get_boot_device(); 71 } 72 73 #ifdef CONFIG_SPL_MMC_SUPPORT 74 u32 spl_boot_mode(const u32 boot_device) 75 { 76 return MMCSD_MODE_RAW; 77 } 78 #endif 79 80 void board_init_f(ulong dummy) 81 { 82 int ret; 83 84 /* 85 * Pin muxing needs to be done before UART output, since 86 * on A38x the UART pins need some re-muxing for output 87 * to work. 88 */ 89 board_early_init_f(); 90 91 /* Example code showing how to enable the debug UART on MVEBU */ 92 #ifdef EARLY_UART 93 /* 94 * Debug UART can be used from here if required: 95 * 96 * debug_uart_init(); 97 * printch('a'); 98 * printhex8(0x1234); 99 * printascii("string"); 100 */ 101 #endif 102 103 ret = spl_init(); 104 if (ret) { 105 debug("spl_init() failed: %d\n", ret); 106 hang(); 107 } 108 109 /* Use special translation offset for SPL */ 110 dm_set_translation_offset(0xd0000000 - 0xf1000000); 111 112 preloader_console_init(); 113 114 timer_init(); 115 116 /* Armada 375 does not support SerDes and DDR3 init yet */ 117 #if !defined(CONFIG_ARMADA_375) 118 /* First init the serdes PHY's */ 119 serdes_phy_config(); 120 121 /* Setup DDR */ 122 ddr3_init(); 123 #endif 124 125 /* 126 * Return to the BootROM to continue the Marvell xmodem 127 * UART boot protocol. As initiated by the kwboot tool. 128 * 129 * This can only be done by the BootROM and not by the 130 * U-Boot SPL infrastructure, since the beginning of the 131 * image is already read and interpreted by the BootROM. 132 * SPL has no chance to receive this information. So we 133 * need to return to the BootROM to enable this xmodem 134 * UART download. 135 * 136 * If booting from NAND lets let the BootROM load the 137 * rest of the bootloader. 138 */ 139 switch (get_boot_device()) { 140 case BOOT_DEVICE_UART: 141 #if defined(CONFIG_ARMADA_38X) 142 case BOOT_DEVICE_NAND: 143 #endif 144 return_to_bootrom(); 145 } 146 } 147