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 <hang.h> 11 #include <init.h> 12 #include <log.h> 13 #include <spl.h> 14 #include <asm/global_data.h> 15 #include <asm/io.h> 16 #include <asm/arch/cpu.h> 17 #include <asm/arch/soc.h> 18 get_boot_device(void)19static u32 get_boot_device(void) 20 { 21 u32 val; 22 u32 boot_device; 23 24 /* 25 * First check, if UART boot-mode is active. This can only 26 * be done, via the bootrom error register. Here the 27 * MSB marks if the UART mode is active. 28 */ 29 val = readl(CONFIG_BOOTROM_ERR_REG); 30 boot_device = (val & BOOTROM_ERR_MODE_MASK) >> BOOTROM_ERR_MODE_OFFS; 31 debug("BOOTROM_REG=0x%08x boot_device=0x%x\n", val, boot_device); 32 if (boot_device == BOOTROM_ERR_MODE_UART) 33 return BOOT_DEVICE_UART; 34 35 #ifdef CONFIG_ARMADA_38X 36 /* 37 * If the bootrom error code contains any other than zeros it's an 38 * error condition and the bootROM has fallen back to UART boot 39 */ 40 boot_device = (val & BOOTROM_ERR_CODE_MASK) >> BOOTROM_ERR_CODE_OFFS; 41 if (boot_device) 42 return BOOT_DEVICE_UART; 43 #endif 44 45 /* 46 * Now check the SAR register for the strapped boot-device 47 */ 48 val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */ 49 boot_device = (val & BOOT_DEV_SEL_MASK) >> BOOT_DEV_SEL_OFFS; 50 debug("SAR_REG=0x%08x boot_device=0x%x\n", val, boot_device); 51 switch (boot_device) { 52 #if defined(CONFIG_ARMADA_38X) 53 case BOOT_FROM_NAND: 54 return BOOT_DEVICE_NAND; 55 #endif 56 #ifdef CONFIG_SPL_MMC_SUPPORT 57 case BOOT_FROM_MMC: 58 case BOOT_FROM_MMC_ALT: 59 return BOOT_DEVICE_MMC1; 60 #endif 61 case BOOT_FROM_UART: 62 #ifdef BOOT_FROM_UART_ALT 63 case BOOT_FROM_UART_ALT: 64 #endif 65 return BOOT_DEVICE_UART; 66 #ifdef BOOT_FROM_SATA 67 case BOOT_FROM_SATA: 68 case BOOT_FROM_SATA_ALT: 69 return BOOT_DEVICE_SATA; 70 #endif 71 case BOOT_FROM_SPI: 72 default: 73 return BOOT_DEVICE_SPI; 74 }; 75 } 76 spl_boot_device(void)77u32 spl_boot_device(void) 78 { 79 return get_boot_device(); 80 } 81 board_init_f(ulong dummy)82void board_init_f(ulong dummy) 83 { 84 int ret; 85 86 /* 87 * Pin muxing needs to be done before UART output, since 88 * on A38x the UART pins need some re-muxing for output 89 * to work. 90 */ 91 board_early_init_f(); 92 93 /* Example code showing how to enable the debug UART on MVEBU */ 94 #ifdef EARLY_UART 95 /* 96 * Debug UART can be used from here if required: 97 * 98 * debug_uart_init(); 99 * printch('a'); 100 * printhex8(0x1234); 101 * printascii("string"); 102 */ 103 #endif 104 105 /* 106 * Use special translation offset for SPL. This needs to be 107 * configured *before* spl_init() is called as this function 108 * calls dm_init() which calls the bind functions of the 109 * device drivers. Here the base address needs to be configured 110 * (translated) correctly. 111 */ 112 gd->translation_offset = 0xd0000000 - 0xf1000000; 113 114 ret = spl_init(); 115 if (ret) { 116 debug("spl_init() failed: %d\n", ret); 117 hang(); 118 } 119 120 preloader_console_init(); 121 122 timer_init(); 123 124 /* Armada 375 does not support SerDes and DDR3 init yet */ 125 #if !defined(CONFIG_ARMADA_375) 126 /* First init the serdes PHY's */ 127 serdes_phy_config(); 128 129 /* Setup DDR */ 130 ddr3_init(); 131 #endif 132 133 /* Initialize Auto Voltage Scaling */ 134 mv_avs_init(); 135 136 /* Update read timing control for PCIe */ 137 mv_rtc_config(); 138 139 /* 140 * Return to the BootROM to continue the Marvell xmodem 141 * UART boot protocol. As initiated by the kwboot tool. 142 * 143 * This can only be done by the BootROM and not by the 144 * U-Boot SPL infrastructure, since the beginning of the 145 * image is already read and interpreted by the BootROM. 146 * SPL has no chance to receive this information. So we 147 * need to return to the BootROM to enable this xmodem 148 * UART download. 149 * 150 * If booting from NAND lets let the BootROM load the 151 * rest of the bootloader. 152 */ 153 switch (get_boot_device()) { 154 case BOOT_DEVICE_UART: 155 #if defined(CONFIG_ARMADA_38X) 156 case BOOT_DEVICE_NAND: 157 #endif 158 return_to_bootrom(); 159 } 160 } 161