1 /*
2  * (C) Copyright 2000-2003
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * Copyright (C) 2004-2008, 2012 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 <spi.h>
29 #include <asm/immap.h>
30 #include <asm/io.h>
31 
32 DECLARE_GLOBAL_DATA_PTR;
33 
34 int checkboard(void)
35 {
36 	/*
37 	 * need to to:
38 	 * Check serial flash size. if 2mb evb, else 8mb demo
39 	 */
40 	puts("Board: ");
41 	puts("Freescale M54451 EVB\n");
42 	return 0;
43 };
44 
45 phys_size_t initdram(int board_type)
46 {
47 	u32 dramsize;
48 #ifdef CONFIG_CF_SBF
49 	/*
50 	 * Serial Boot: The dram is already initialized in start.S
51 	 * only require to return DRAM size
52 	 */
53 	dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
54 #else
55 	sdramc_t *sdram = (sdramc_t *)(MMAP_SDRAM);
56 	gpio_t *gpio = (gpio_t *)(MMAP_GPIO);
57 	u32 i;
58 
59 	dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
60 
61 	if ((in_be32(&sdram->sdcfg1) == CONFIG_SYS_SDRAM_CFG1) &&
62 	    (in_be32(&sdram->sdcfg2) == CONFIG_SYS_SDRAM_CFG2))
63 		return dramsize;
64 
65 	for (i = 0x13; i < 0x20; i++) {
66 		if (dramsize == (1 << i))
67 			break;
68 	}
69 	i--;
70 
71 	out_8(&gpio->mscr_sdram, CONFIG_SYS_SDRAM_DRV_STRENGTH);
72 
73 	out_be32(&sdram->sdcs0, CONFIG_SYS_SDRAM_BASE | i);
74 
75 	out_be32(&sdram->sdcfg1, CONFIG_SYS_SDRAM_CFG1);
76 	out_be32(&sdram->sdcfg2, CONFIG_SYS_SDRAM_CFG2);
77 
78 	udelay(200);
79 
80 	/* Issue PALL */
81 	out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 2);
82 	__asm__("nop");
83 
84 	/* Perform two refresh cycles */
85 	out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
86 	__asm__("nop");
87 	out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
88 	__asm__("nop");
89 
90 	/* Issue LEMR */
91 	out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
92 	__asm__("nop");
93 	out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
94 	__asm__("nop");
95 
96 	out_be32(&sdram->sdcr,
97 		(CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000000);
98 
99 	udelay(100);
100 #endif
101 	return (dramsize);
102 };
103 
104 int testdram(void)
105 {
106 	/* TODO: XXX XXX XXX */
107 	printf("DRAM test not implemented!\n");
108 
109 	return (0);
110 }
111