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 DECLARE_GLOBAL_DATA_PTR; 17 18 static u32 get_boot_device(void) 19 { 20 u32 val; 21 u32 boot_device; 22 23 /* 24 * First check, if UART boot-mode is active. This can only 25 * be done, via the bootrom error register. Here the 26 * MSB marks if the UART mode is active. 27 */ 28 val = readl(CONFIG_BOOTROM_ERR_REG); 29 boot_device = (val & BOOTROM_ERR_MODE_MASK) >> BOOTROM_ERR_MODE_OFFS; 30 debug("BOOTROM_REG=0x%08x boot_device=0x%x\n", val, boot_device); 31 if (boot_device == BOOTROM_ERR_MODE_UART) 32 return BOOT_DEVICE_UART; 33 34 /* 35 * Now check the SAR register for the strapped boot-device 36 */ 37 val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */ 38 boot_device = (val & BOOT_DEV_SEL_MASK) >> BOOT_DEV_SEL_OFFS; 39 debug("SAR_REG=0x%08x boot_device=0x%x\n", val, boot_device); 40 switch (boot_device) { 41 #ifdef CONFIG_SPL_MMC_SUPPORT 42 case BOOT_FROM_MMC: 43 case BOOT_FROM_MMC_ALT: 44 return BOOT_DEVICE_MMC1; 45 #endif 46 case BOOT_FROM_UART: 47 return BOOT_DEVICE_UART; 48 case BOOT_FROM_SPI: 49 default: 50 return BOOT_DEVICE_SPI; 51 }; 52 } 53 54 u32 spl_boot_device(void) 55 { 56 return get_boot_device(); 57 } 58 59 #ifdef CONFIG_SPL_MMC_SUPPORT 60 u32 spl_boot_mode(void) 61 { 62 return MMCSD_MODE_RAW; 63 } 64 #endif 65 66 void board_init_f(ulong dummy) 67 { 68 int ret; 69 70 /* 71 * Pin muxing needs to be done before UART output, since 72 * on A38x the UART pins need some re-muxing for output 73 * to work. 74 */ 75 board_early_init_f(); 76 77 /* Example code showing how to enable the debug UART on MVEBU */ 78 #ifdef EARLY_UART 79 /* 80 * Debug UART can be used from here if required: 81 * 82 * debug_uart_init(); 83 * printch('a'); 84 * printhex8(0x1234); 85 * printascii("string"); 86 */ 87 #endif 88 89 ret = spl_init(); 90 if (ret) { 91 debug("spl_init() failed: %d\n", ret); 92 hang(); 93 } 94 95 /* Use special translation offset for SPL */ 96 dm_set_translation_offset(0xd0000000 - 0xf1000000); 97 98 preloader_console_init(); 99 100 timer_init(); 101 102 /* First init the serdes PHY's */ 103 serdes_phy_config(); 104 105 /* Setup DDR */ 106 ddr3_init(); 107 108 /* 109 * Return to the BootROM to continue the Marvell xmodem 110 * UART boot protocol. As initiated by the kwboot tool. 111 * 112 * This can only be done by the BootROM and not by the 113 * U-Boot SPL infrastructure, since the beginning of the 114 * image is already read and interpreted by the BootROM. 115 * SPL has no chance to receive this information. So we 116 * need to return to the BootROM to enable this xmodem 117 * UART download. 118 */ 119 if (get_boot_device() == BOOT_DEVICE_UART) 120 return_to_bootrom(); 121 } 122