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)15 static 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 defined(CONFIG_ARMADA_38X) 29 /* 30 * If the bootrom error register contains any else than zeros 31 * in the first 8 bits it's an error condition. And in that case 32 * try to boot from UART. 33 */ 34 if (boot_device) 35 #else 36 if (boot_device == BOOTROM_ERR_MODE_UART) 37 #endif 38 return BOOT_DEVICE_UART; 39 40 /* 41 * Now check the SAR register for the strapped boot-device 42 */ 43 val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */ 44 boot_device = (val & BOOT_DEV_SEL_MASK) >> BOOT_DEV_SEL_OFFS; 45 debug("SAR_REG=0x%08x boot_device=0x%x\n", val, boot_device); 46 switch (boot_device) { 47 #if defined(CONFIG_ARMADA_38X) 48 case BOOT_FROM_NAND: 49 return BOOT_DEVICE_NAND; 50 #endif 51 #ifdef CONFIG_SPL_MMC_SUPPORT 52 case BOOT_FROM_MMC: 53 case BOOT_FROM_MMC_ALT: 54 return BOOT_DEVICE_MMC1; 55 #endif 56 case BOOT_FROM_UART: 57 #ifdef BOOT_FROM_UART_ALT 58 case BOOT_FROM_UART_ALT: 59 #endif 60 return BOOT_DEVICE_UART; 61 case BOOT_FROM_SPI: 62 default: 63 return BOOT_DEVICE_SPI; 64 }; 65 } 66 spl_boot_device(void)67 u32 spl_boot_device(void) 68 { 69 return get_boot_device(); 70 } 71 board_init_f(ulong dummy)72 void board_init_f(ulong dummy) 73 { 74 int ret; 75 76 /* 77 * Pin muxing needs to be done before UART output, since 78 * on A38x the UART pins need some re-muxing for output 79 * to work. 80 */ 81 board_early_init_f(); 82 83 /* Example code showing how to enable the debug UART on MVEBU */ 84 #ifdef EARLY_UART 85 /* 86 * Debug UART can be used from here if required: 87 * 88 * debug_uart_init(); 89 * printch('a'); 90 * printhex8(0x1234); 91 * printascii("string"); 92 */ 93 #endif 94 95 ret = spl_init(); 96 if (ret) { 97 debug("spl_init() failed: %d\n", ret); 98 hang(); 99 } 100 101 /* Use special translation offset for SPL */ 102 dm_set_translation_offset(0xd0000000 - 0xf1000000); 103 104 preloader_console_init(); 105 106 timer_init(); 107 108 /* Armada 375 does not support SerDes and DDR3 init yet */ 109 #if !defined(CONFIG_ARMADA_375) 110 /* First init the serdes PHY's */ 111 serdes_phy_config(); 112 113 /* Setup DDR */ 114 ddr3_init(); 115 #endif 116 117 /* 118 * Return to the BootROM to continue the Marvell xmodem 119 * UART boot protocol. As initiated by the kwboot tool. 120 * 121 * This can only be done by the BootROM and not by the 122 * U-Boot SPL infrastructure, since the beginning of the 123 * image is already read and interpreted by the BootROM. 124 * SPL has no chance to receive this information. So we 125 * need to return to the BootROM to enable this xmodem 126 * UART download. 127 * 128 * If booting from NAND lets let the BootROM load the 129 * rest of the bootloader. 130 */ 131 switch (get_boot_device()) { 132 case BOOT_DEVICE_UART: 133 #if defined(CONFIG_ARMADA_38X) 134 case BOOT_DEVICE_NAND: 135 #endif 136 return_to_bootrom(); 137 } 138 } 139