summaryrefslogtreecommitdiff
path: root/board/amcc/sequoia/sdram.c
blob: bb5c5ee449534d4547d63b639e553c1a93fbc524 (plain)
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
85
86
87
88
89
90
91
92
/*
 * (C) Copyright 2006
 * Sylvie Gohl,             AMCC/IBM, gohl.sylvie@fr.ibm.com
 * Jacqueline Pira-Ferriol, AMCC/IBM, jpira-ferriol@fr.ibm.com
 * Thierry Roman,           AMCC/IBM, thierry_roman@fr.ibm.com
 * Alain Saurel,            AMCC/IBM, alain.saurel@fr.ibm.com
 * Robert Snyder,           AMCC/IBM, rob.snyder@fr.ibm.com
 *
 * (C) Copyright 2006-2007
 * Stefan Roese, DENX Software Engineering, sr@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/* define DEBUG for debug output */
#undef DEBUG

#include <common.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/ppc440.h>

/*-----------------------------------------------------------------------------+
 * Prototypes
 *-----------------------------------------------------------------------------*/
extern int denali_wait_for_dlllock(void);
extern void denali_core_search_data_eye(void);

/*************************************************************************
 *
 * initdram -- 440EPx's DDR controller is a DENALI Core
 *
 ************************************************************************/
phys_size_t initdram(void)
{
#if !defined(CONFIG_SYS_RAMBOOT)
	ulong speed = get_bus_freq(0);

	mtsdram(DDR0_02, 0x00000000);

	mtsdram(DDR0_00, 0x0000190A);
	mtsdram(DDR0_01, 0x01000000);
	mtsdram(DDR0_03, 0x02030602);
	mtsdram(DDR0_04, 0x0A020200);
	mtsdram(DDR0_05, 0x02020308);
	mtsdram(DDR0_06, 0x0102C812);
	mtsdram(DDR0_07, 0x000D0100);
	mtsdram(DDR0_08, 0x02430001);
	mtsdram(DDR0_09, 0x00011D5F);
	mtsdram(DDR0_10, 0x00000100);
	mtsdram(DDR0_11, 0x0027C800);
	mtsdram(DDR0_12, 0x00000003);
	mtsdram(DDR0_14, 0x00000000);
	mtsdram(DDR0_17, 0x19000000);
	mtsdram(DDR0_18, 0x19191919);
	mtsdram(DDR0_19, 0x19191919);
	mtsdram(DDR0_20, 0x0B0B0B0B);
	mtsdram(DDR0_21, 0x0B0B0B0B);
	mtsdram(DDR0_22, 0x00267F0B);
	mtsdram(DDR0_23, 0x00000000);
	mtsdram(DDR0_24, 0x01010002);
	if (speed > 133333334)
		mtsdram(DDR0_26, 0x5B26050C);
	else
		mtsdram(DDR0_26, 0x5B260408);
	mtsdram(DDR0_27, 0x0000682B);
	mtsdram(DDR0_28, 0x00000000);
	mtsdram(DDR0_31, 0x00000000);
	mtsdram(DDR0_42, 0x01000006);
	mtsdram(DDR0_43, 0x030A0200);
	mtsdram(DDR0_44, 0x00000003);
	mtsdram(DDR0_02, 0x00000001);

	denali_wait_for_dlllock();
#endif /* #ifndef CONFIG_SYS_RAMBOOT */

#ifdef CONFIG_DDR_DATA_EYE
	/* -----------------------------------------------------------+
	 * Perform data eye search if requested.
	 * ----------------------------------------------------------*/
	denali_core_search_data_eye();
#endif

	/*
	 * Clear possible errors resulting from data-eye-search.
	 * If not done, then we could get an interrupt later on when
	 * exceptions are enabled.
	 */
	set_mcsr(get_mcsr());

	return (CONFIG_SYS_MBYTES_SDRAM << 20);
}