1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000-2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Copyright (C) 2004-2008, 2012 Freescale Semiconductor, Inc.
* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
*/
#include <config.h>
#include <common.h>
#include <init.h>
#include <asm/global_data.h>
#include <asm/immap.h>
#include <asm/io.h>
#include <linux/delay.h>
DECLARE_GLOBAL_DATA_PTR;
int checkboard(void)
{
puts("Board: ");
puts("Freescale M53017EVB\n");
return 0;
};
int dram_init(void)
{
sdram_t *sdram = (sdram_t *)(MMAP_SDRAM);
u32 dramsize, i;
dramsize = CFG_SYS_SDRAM_SIZE * 0x100000;
for (i = 0x13; i < 0x20; i++) {
if (dramsize == (1 << i))
break;
}
i--;
out_be32(&sdram->cs0, CFG_SYS_SDRAM_BASE | i);
#ifdef CFG_SYS_SDRAM_BASE1
out_be32(&sdram->cs1, CFG_SYS_SDRAM_BASE | i);
#endif
out_be32(&sdram->cfg1, CFG_SYS_SDRAM_CFG1);
out_be32(&sdram->cfg2, CFG_SYS_SDRAM_CFG2);
udelay(500);
/* Issue PALL */
out_be32(&sdram->ctrl, CFG_SYS_SDRAM_CTRL | 2);
asm("nop");
/* Perform two refresh cycles */
out_be32(&sdram->ctrl, CFG_SYS_SDRAM_CTRL | 4);
out_be32(&sdram->ctrl, CFG_SYS_SDRAM_CTRL | 4);
asm("nop");
/* Issue LEMR */
out_be32(&sdram->mode, CFG_SYS_SDRAM_MODE);
asm("nop");
out_be32(&sdram->mode, CFG_SYS_SDRAM_EMOD);
asm("nop");
out_be32(&sdram->ctrl, CFG_SYS_SDRAM_CTRL | 2);
asm("nop");
out_be32(&sdram->ctrl,
(CFG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000c00);
asm("nop");
udelay(100);
gd->ram_size = dramsize;
return 0;
};
int testdram(void)
{
/* TODO: XXX XXX XXX */
printf("DRAM test not implemented!\n");
return (0);
}
|