1 /* 2 * (C) Copyright 2000-2003 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. 6 * Hayden Fraser (Hayden.Fraser@freescale.com) 7 * 8 * See file CREDITS for list of people who contributed to this 9 * project. 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License as 13 * published by the Free Software Foundation; either version 2 of 14 * the License, or (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 24 * MA 02111-1307 USA 25 */ 26 27 #include <common.h> 28 #include <asm/immap.h> 29 30 int checkboard(void) 31 { 32 puts("Board: "); 33 puts("Freescale MCF5253 EVBE\n"); 34 return 0; 35 }; 36 37 phys_size_t initdram(int board_type) 38 { 39 /* 40 * Check to see if the SDRAM has already been initialized 41 * by a run control tool 42 */ 43 if (!(mbar_readLong(MCFSIM_DCR) & 0x8000)) { 44 u32 RC, dramsize; 45 46 RC = (CFG_CLK / 1000000) >> 1; 47 RC = (RC * 15) >> 4; 48 49 /* Initialize DRAM Control Register: DCR */ 50 mbar_writeShort(MCFSIM_DCR, (0x8400 | RC)); 51 asm("nop"); 52 53 mbar_writeLong(MCFSIM_DACR0, 0x00002320); 54 asm("nop"); 55 56 /* Initialize DMR0 */ 57 dramsize = ((CFG_SDRAM_SIZE << 20) - 1) & 0xFFFC0000; 58 mbar_writeLong(MCFSIM_DMR0, dramsize | 1); 59 asm("nop"); 60 61 mbar_writeLong(MCFSIM_DACR0, 0x00002328); 62 asm("nop"); 63 64 /* Write to this block to initiate precharge */ 65 *(u32 *) (CFG_SDRAM_BASE) = 0xa5a5a5a5; 66 asm("nop"); 67 68 /* Set RE bit in DACR */ 69 mbar_writeLong(MCFSIM_DACR0, 70 mbar_readLong(MCFSIM_DACR0) | 0x8000); 71 asm("nop"); 72 73 /* Wait for at least 8 auto refresh cycles to occur */ 74 udelay(500); 75 76 /* Finish the configuration by issuing the MRS */ 77 mbar_writeLong(MCFSIM_DACR0, 78 mbar_readLong(MCFSIM_DACR0) | 0x0040); 79 asm("nop"); 80 81 *(u32 *) (CFG_SDRAM_BASE + 0x800) = 0xa5a5a5a5; 82 } 83 84 return CFG_SDRAM_SIZE * 1024 * 1024; 85 } 86 87 int testdram(void) 88 { 89 /* TODO: XXX XXX XXX */ 90 printf("DRAM test not implemented!\n"); 91 92 return (0); 93 } 94 95 #ifdef CONFIG_CMD_IDE 96 #include <ata.h> 97 int ide_preinit(void) 98 { 99 return (0); 100 } 101 102 void ide_set_reset(int idereset) 103 { 104 volatile atac_t *ata = (atac_t *) CFG_ATA_BASE_ADDR; 105 long period; 106 /* t1, t2, t3, t4, t5, t6, t9, tRD, tA */ 107 int piotms[5][9] = { {70, 165, 60, 30, 50, 5, 20, 0, 35}, /* PIO 0 */ 108 {50, 125, 45, 20, 35, 5, 15, 0, 35}, /* PIO 1 */ 109 {30, 100, 30, 15, 20, 5, 10, 0, 35}, /* PIO 2 */ 110 {30, 80, 30, 10, 20, 5, 10, 0, 35}, /* PIO 3 */ 111 {25, 70, 20, 10, 20, 5, 10, 0, 35} /* PIO 4 */ 112 }; 113 114 if (idereset) { 115 ata->cr = 0; /* control reset */ 116 udelay(100); 117 } else { 118 mbar2_writeLong(CIM_MISCCR, CIM_MISCCR_CPUEND); 119 120 #define CALC_TIMING(t) (t + period - 1) / period 121 period = 1000000000 / (CFG_CLK / 2); /* period in ns */ 122 123 /*ata->ton = CALC_TIMING (180); */ 124 ata->t1 = CALC_TIMING(piotms[2][0]); 125 ata->t2w = CALC_TIMING(piotms[2][1]); 126 ata->t2r = CALC_TIMING(piotms[2][1]); 127 ata->ta = CALC_TIMING(piotms[2][8]); 128 ata->trd = CALC_TIMING(piotms[2][7]); 129 ata->t4 = CALC_TIMING(piotms[2][3]); 130 ata->t9 = CALC_TIMING(piotms[2][6]); 131 132 ata->cr = 0x40; /* IORDY enable */ 133 udelay(2000); 134 ata->cr |= 0x01; /* IORDY enable */ 135 } 136 } 137 #endif /* CONFIG_CMD_IDE */ 138