blob: 9109edb3710a3eb9f97e2bce35e4ddd7767b68be [file] [log] [blame]
TsiChungLiew1552af72008-01-14 17:43:33 -06001/*
2 * (C) Copyright 2000-2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
6 * TsiChung Liew (Tsi-Chung.Liew@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
30DECLARE_GLOBAL_DATA_PTR;
31
32int checkboard(void)
33{
34 puts("Board: ");
35 puts("Freescale M52277 EVB\n");
36 return 0;
37};
38
Becky Bruce9973e3c2008-06-09 16:03:40 -050039phys_size_t initdram(int board_type)
TsiChungLiew1552af72008-01-14 17:43:33 -060040{
TsiChung Liewa21d0c22008-10-21 15:37:02 +000041 u32 dramsize;
42
43#ifdef CONFIG_CF_SBF
44 /*
45 * Serial Boot: The dram is already initialized in start.S
46 * only require to return DRAM size
47 */
48 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
49#else
TsiChungLiew1552af72008-01-14 17:43:33 -060050 volatile sdramc_t *sdram = (volatile sdramc_t *)(MMAP_SDRAM);
TsiChung Liewa21d0c22008-10-21 15:37:02 +000051 volatile gpio_t *gpio = (volatile gpio_t *)(MMAP_GPIO);
52 u32 i;
TsiChungLiew1552af72008-01-14 17:43:33 -060053
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020054 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
TsiChungLiew1552af72008-01-14 17:43:33 -060055
56 for (i = 0x13; i < 0x20; i++) {
57 if (dramsize == (1 << i))
58 break;
59 }
60 i--;
61
TsiChung Liewa21d0c22008-10-21 15:37:02 +000062 gpio->mscr_sdram = CONFIG_SYS_SDRAM_DRV_STRENGTH;
63
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020064 sdram->sdcs0 = (CONFIG_SYS_SDRAM_BASE | i);
TsiChungLiew1552af72008-01-14 17:43:33 -060065
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020066 sdram->sdcfg1 = CONFIG_SYS_SDRAM_CFG1;
67 sdram->sdcfg2 = CONFIG_SYS_SDRAM_CFG2;
TsiChungLiew1552af72008-01-14 17:43:33 -060068
69 /* Issue PALL */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020070 sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2;
TsiChung Liewa21d0c22008-10-21 15:37:02 +000071 __asm__("nop");
TsiChungLiew1552af72008-01-14 17:43:33 -060072
73 /* Issue LEMR */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020074 sdram->sdmr = CONFIG_SYS_SDRAM_MODE;
TsiChung Liewa21d0c22008-10-21 15:37:02 +000075 __asm__("nop");
76 sdram->sdmr = CONFIG_SYS_SDRAM_EMOD;
77 __asm__("nop");
TsiChungLiew1552af72008-01-14 17:43:33 -060078
79 udelay(1000);
80
81 /* Issue PALL */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020082 sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2;
TsiChung Liewa21d0c22008-10-21 15:37:02 +000083 __asm__("nop");
TsiChungLiew1552af72008-01-14 17:43:33 -060084
85 /* Perform two refresh cycles */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020086 sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4;
TsiChung Liewa21d0c22008-10-21 15:37:02 +000087 __asm__("nop");
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020088 sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4;
TsiChung Liewa21d0c22008-10-21 15:37:02 +000089 __asm__("nop");
TsiChungLiew1552af72008-01-14 17:43:33 -060090
TsiChung Liewa21d0c22008-10-21 15:37:02 +000091 sdram->sdcr = (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000C00;
TsiChungLiew1552af72008-01-14 17:43:33 -060092
93 udelay(100);
TsiChung Liewa21d0c22008-10-21 15:37:02 +000094#endif
TsiChungLiew1552af72008-01-14 17:43:33 -060095 return (dramsize);
96};
97
98int testdram(void)
99{
100 /* TODO: XXX XXX XXX */
101 printf("DRAM test not implemented!\n");
102
103 return (0);
104}