2 * (C) Copyright 2000-2003
5 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
8 * See file CREDITS for list of people who contributed to this
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.
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.
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,
28 #include <asm/immap.h>
33 puts("Freescale MCF5253 EVBE\n");
37 phys_size_t initdram(int board_type)
40 * Check to see if the SDRAM has already been initialized
41 * by a run control tool
43 if (!(mbar_readLong(MCFSIM_DCR) & 0x8000)) {
46 RC = (CONFIG_SYS_CLK / 1000000) >> 1;
49 /* Initialize DRAM Control Register: DCR */
50 mbar_writeShort(MCFSIM_DCR, (0x8400 | RC));
53 mbar_writeLong(MCFSIM_DACR0, 0x00002320);
57 dramsize = ((CONFIG_SYS_SDRAM_SIZE << 20) - 1) & 0xFFFC0000;
58 mbar_writeLong(MCFSIM_DMR0, dramsize | 1);
61 mbar_writeLong(MCFSIM_DACR0, 0x00002328);
64 /* Write to this block to initiate precharge */
65 *(u32 *) (CONFIG_SYS_SDRAM_BASE) = 0xa5a5a5a5;
68 /* Set RE bit in DACR */
69 mbar_writeLong(MCFSIM_DACR0,
70 mbar_readLong(MCFSIM_DACR0) | 0x8000);
73 /* Wait for at least 8 auto refresh cycles to occur */
76 /* Finish the configuration by issuing the MRS */
77 mbar_writeLong(MCFSIM_DACR0,
78 mbar_readLong(MCFSIM_DACR0) | 0x0040);
81 *(u32 *) (CONFIG_SYS_SDRAM_BASE + 0x800) = 0xa5a5a5a5;
84 return CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
89 /* TODO: XXX XXX XXX */
90 printf("DRAM test not implemented!\n");
102 void ide_set_reset(int idereset)
104 volatile atac_t *ata = (atac_t *) CONFIG_SYS_ATA_BASE_ADDR;
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 */
115 ata->cr = 0; /* control reset */
118 mbar2_writeLong(CIM_MISCCR, CIM_MISCCR_CPUEND);
120 #define CALC_TIMING(t) (t + period - 1) / period
121 period = 1000000000 / (CONFIG_SYS_CLK / 2); /* period in ns */
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]);
132 ata->cr = 0x40; /* IORDY enable */
134 ata->cr |= 0x01; /* IORDY enable */
137 #endif /* CONFIG_CMD_IDE */