1 /* 2 * WORK Microwave work_92105 board support 3 * 4 * (C) Copyright 2014 DENX Software Engineering GmbH 5 * Written-by: Albert ARIBAUD <albert.aribaud@3adev.fr> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <asm/io.h> 12 #include <asm/arch/sys_proto.h> 13 #include <asm/arch/cpu.h> 14 #include <asm/arch/emc.h> 15 #include <asm/gpio.h> 16 #include <spl.h> 17 #include "work_92105_display.h" 18 19 struct emc_dram_settings dram_64mb = { 20 .cmddelay = 0x0001C000, 21 .config0 = 0x00005682, 22 .rascas0 = 0x00000302, 23 .rdconfig = 0x00000011, 24 .trp = 52631578, 25 .tras = 20833333, 26 .tsrex = 12500000, 27 .twr = 66666666, 28 .trc = 13888888, 29 .trfc = 10256410, 30 .txsr = 12500000, 31 .trrd = 1, 32 .tmrd = 1, 33 .tcdlr = 0, 34 .refresh = 128000, 35 .mode = 0x00018000, 36 .emode = 0x02000000 37 }; 38 39 const struct emc_dram_settings dram_128mb = { 40 .cmddelay = 0x0001C000, 41 .config0 = 0x00005882, 42 .rascas0 = 0x00000302, 43 .rdconfig = 0x00000011, 44 .trp = 52631578, 45 .tras = 22222222, 46 .tsrex = 8333333, 47 .twr = 66666666, 48 .trc = 14814814, 49 .trfc = 10256410, 50 .txsr = 8333333, 51 .trrd = 1, 52 .tmrd = 1, 53 .tcdlr = 0, 54 .refresh = 128000, 55 .mode = 0x00030000, 56 .emode = 0x02000000 57 }; 58 59 void spl_board_init(void) 60 { 61 /* initialize serial port for console */ 62 lpc32xx_uart_init(CONFIG_SYS_LPC32XX_UART); 63 /* initialize console */ 64 preloader_console_init(); 65 /* init DDR and NAND to chainload U-Boot */ 66 ddr_init(&dram_128mb); 67 /* 68 * If this is actually a 64MB module, then the highest column 69 * bit in any address will be ignored, and thus address 0x80000000 70 * should be mirrored at address 0x80000800. Test this. 71 */ 72 writel(0x31415926, 0x80000000); /* write Pi at 0x80000000 */ 73 writel(0x16180339, 0x80000800); /* write Phi at 0x80000800 */ 74 if (readl(0x80000000) == 0x16180339) /* check 0x80000000 */ { 75 /* actually 64MB mirrored: reconfigure controller */ 76 ddr_init(&dram_64mb); 77 } 78 /* initialize NAND controller to load U-Boot from NAND */ 79 lpc32xx_mlc_nand_init(); 80 } 81 82 u32 spl_boot_device(void) 83 { 84 return BOOT_DEVICE_NAND; 85 } 86