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 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 (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 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 void board_init_f(ulong dummy) 74 { 75 int ret; 76 77 /* 78 * Pin muxing needs to be done before UART output, since 79 * on A38x the UART pins need some re-muxing for output 80 * to work. 81 */ 82 board_early_init_f(); 83 84 /* Example code showing how to enable the debug UART on MVEBU */ 85 #ifdef EARLY_UART 86 /* 87 * Debug UART can be used from here if required: 88 * 89 * debug_uart_init(); 90 * printch('a'); 91 * printhex8(0x1234); 92 * printascii("string"); 93 */ 94 #endif 95 96 ret = spl_init(); 97 if (ret) { 98 debug("spl_init() failed: %d\n", ret); 99 hang(); 100 } 101 102 /* Use special translation offset for SPL */ 103 dm_set_translation_offset(0xd0000000 - 0xf1000000); 104 105 preloader_console_init(); 106 107 timer_init(); 108 109 /* Armada 375 does not support SerDes and DDR3 init yet */ 110 #if !defined(CONFIG_ARMADA_375) 111 /* First init the serdes PHY's */ 112 serdes_phy_config(); 113 114 /* Setup DDR */ 115 ddr3_init(); 116 #endif 117 118 /* 119 * Return to the BootROM to continue the Marvell xmodem 120 * UART boot protocol. As initiated by the kwboot tool. 121 * 122 * This can only be done by the BootROM and not by the 123 * U-Boot SPL infrastructure, since the beginning of the 124 * image is already read and interpreted by the BootROM. 125 * SPL has no chance to receive this information. So we 126 * need to return to the BootROM to enable this xmodem 127 * UART download. 128 * 129 * If booting from NAND lets let the BootROM load the 130 * rest of the bootloader. 131 */ 132 switch (get_boot_device()) { 133 case BOOT_DEVICE_UART: 134 #if defined(CONFIG_ARMADA_38X) 135 case BOOT_DEVICE_NAND: 136 #endif 137 return_to_bootrom(); 138 } 139 } 140