1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2014-2016 Stefan Roese <sr@denx.de> 4 */ 5 6 #include <common.h> 7 #include <dm.h> 8 #include <debug_uart.h> 9 #include <fdtdec.h> 10 #include <spl.h> 11 #include <asm/io.h> 12 #include <asm/arch/cpu.h> 13 #include <asm/arch/soc.h> 14 get_boot_device(void)15static u32 get_boot_device(void) 16 { 17 u32 val; 18 u32 boot_device; 19 20 /* 21 * First check, if UART boot-mode is active. This can only 22 * be done, via the bootrom error register. Here the 23 * MSB marks if the UART mode is active. 24 */ 25 val = readl(CONFIG_BOOTROM_ERR_REG); 26 boot_device = (val & BOOTROM_ERR_MODE_MASK) >> BOOTROM_ERR_MODE_OFFS; 27 debug("BOOTROM_REG=0x%08x boot_device=0x%x\n", val, boot_device); 28 if (boot_device == BOOTROM_ERR_MODE_UART) 29 return BOOT_DEVICE_UART; 30 31 #ifdef CONFIG_ARMADA_38X 32 /* 33 * If the bootrom error code contains any other than zeros it's an 34 * error condition and the bootROM has fallen back to UART boot 35 */ 36 boot_device = (val & BOOTROM_ERR_CODE_MASK) >> BOOTROM_ERR_CODE_OFFS; 37 if (boot_device) 38 return BOOT_DEVICE_UART; 39 #endif 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 #ifdef BOOT_FROM_SATA 63 case BOOT_FROM_SATA: 64 case BOOT_FROM_SATA_ALT: 65 return BOOT_DEVICE_SATA; 66 #endif 67 case BOOT_FROM_SPI: 68 default: 69 return BOOT_DEVICE_SPI; 70 }; 71 } 72 spl_boot_device(void)73u32 spl_boot_device(void) 74 { 75 return get_boot_device(); 76 } 77 board_init_f(ulong dummy)78void board_init_f(ulong dummy) 79 { 80 int ret; 81 82 /* 83 * Pin muxing needs to be done before UART output, since 84 * on A38x the UART pins need some re-muxing for output 85 * to work. 86 */ 87 board_early_init_f(); 88 89 /* Example code showing how to enable the debug UART on MVEBU */ 90 #ifdef EARLY_UART 91 /* 92 * Debug UART can be used from here if required: 93 * 94 * debug_uart_init(); 95 * printch('a'); 96 * printhex8(0x1234); 97 * printascii("string"); 98 */ 99 #endif 100 101 /* 102 * Use special translation offset for SPL. This needs to be 103 * configured *before* spl_init() is called as this function 104 * calls dm_init() which calls the bind functions of the 105 * device drivers. Here the base address needs to be configured 106 * (translated) correctly. 107 */ 108 gd->translation_offset = 0xd0000000 - 0xf1000000; 109 110 ret = spl_init(); 111 if (ret) { 112 debug("spl_init() failed: %d\n", ret); 113 hang(); 114 } 115 116 preloader_console_init(); 117 118 timer_init(); 119 120 /* Armada 375 does not support SerDes and DDR3 init yet */ 121 #if !defined(CONFIG_ARMADA_375) 122 /* First init the serdes PHY's */ 123 serdes_phy_config(); 124 125 /* Setup DDR */ 126 ddr3_init(); 127 #endif 128 129 /* Initialize Auto Voltage Scaling */ 130 mv_avs_init(); 131 132 /* 133 * Return to the BootROM to continue the Marvell xmodem 134 * UART boot protocol. As initiated by the kwboot tool. 135 * 136 * This can only be done by the BootROM and not by the 137 * U-Boot SPL infrastructure, since the beginning of the 138 * image is already read and interpreted by the BootROM. 139 * SPL has no chance to receive this information. So we 140 * need to return to the BootROM to enable this xmodem 141 * UART download. 142 * 143 * If booting from NAND lets let the BootROM load the 144 * rest of the bootloader. 145 */ 146 switch (get_boot_device()) { 147 case BOOT_DEVICE_UART: 148 #if defined(CONFIG_ARMADA_38X) 149 case BOOT_DEVICE_NAND: 150 #endif 151 return_to_bootrom(); 152 } 153 } 154