1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2000-2003 4 * Wolfgang Denk, DENX Software Engineering, wd (at) denx.de. 5 * 6 * Copyright (C) 2004-2008, 2012 Freescale Semiconductor, Inc. 7 * TsiChung Liew (Tsi-Chung.Liew (at) freescale.com) 8 */ 9 10 #include <common.h> 11 #include <spi.h> 12 #include <asm/immap.h> 13 #include <asm/io.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 int checkboard(void) 18 { 19 /* 20 * need to to: 21 * Check serial flash size. if 2mb evb, else 8mb demo 22 */ 23 puts("Board: "); 24 puts("Freescale M54451 EVB\n"); 25 return 0; 26 }; 27 28 int dram_init(void) 29 { 30 u32 dramsize; 31 #ifdef CONFIG_CF_SBF 32 /* 33 * Serial Boot: The dram is already initialized in start.S 34 * only require to return DRAM size 35 */ 36 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000; 37 #else 38 sdramc_t *sdram = (sdramc_t *)(MMAP_SDRAM); 39 gpio_t *gpio = (gpio_t *)(MMAP_GPIO); 40 u32 i; 41 42 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000; 43 44 if ((in_be32(&sdram->sdcfg1) == CONFIG_SYS_SDRAM_CFG1) && 45 (in_be32(&sdram->sdcfg2) == CONFIG_SYS_SDRAM_CFG2)) 46 return dramsize; 47 48 for (i = 0x13; i < 0x20; i++) { 49 if (dramsize == (1 << i)) 50 break; 51 } 52 i--; 53 54 out_8(&gpio->mscr_sdram, CONFIG_SYS_SDRAM_DRV_STRENGTH); 55 56 out_be32(&sdram->sdcs0, CONFIG_SYS_SDRAM_BASE | i); 57 58 out_be32(&sdram->sdcfg1, CONFIG_SYS_SDRAM_CFG1); 59 out_be32(&sdram->sdcfg2, CONFIG_SYS_SDRAM_CFG2); 60 61 udelay(200); 62 63 /* Issue PALL */ 64 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 2); 65 __asm__("nop"); 66 67 /* Perform two refresh cycles */ 68 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4); 69 __asm__("nop"); 70 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4); 71 __asm__("nop"); 72 73 /* Issue LEMR */ 74 out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE); 75 __asm__("nop"); 76 out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE); 77 __asm__("nop"); 78 79 out_be32(&sdram->sdcr, 80 (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000000); 81 82 udelay(100); 83 #endif 84 gd->ram_size = dramsize; 85 86 return 0; 87 }; 88 89 int testdram(void) 90 { 91 /* TODO: XXX XXX XXX */ 92 printf("DRAM test not implemented!\n"); 93 94 return (0); 95 } 96
