1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2000-2003
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 *
6 * Copyright (C) 2004-2008, 2012 Freescale Semiconductor, Inc.
7 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
8 */
9
10#include <config.h>
11#include <common.h>
12#include <init.h>
13#include <asm/global_data.h>
14#include <asm/immap.h>
15#include <asm/io.h>
16#include <linux/delay.h>
17
18DECLARE_GLOBAL_DATA_PTR;
19
20int checkboard(void)
21{
22	puts("Board: ");
23	puts("Freescale M53017EVB\n");
24	return 0;
25};
26
27int dram_init(void)
28{
29	sdram_t *sdram = (sdram_t *)(MMAP_SDRAM);
30	u32 dramsize, i;
31
32	dramsize = CFG_SYS_SDRAM_SIZE * 0x100000;
33
34	for (i = 0x13; i < 0x20; i++) {
35		if (dramsize == (1 << i))
36			break;
37	}
38	i--;
39
40	out_be32(&sdram->cs0, CFG_SYS_SDRAM_BASE | i);
41#ifdef CFG_SYS_SDRAM_BASE1
42	out_be32(&sdram->cs1, CFG_SYS_SDRAM_BASE | i);
43#endif
44	out_be32(&sdram->cfg1, CFG_SYS_SDRAM_CFG1);
45	out_be32(&sdram->cfg2, CFG_SYS_SDRAM_CFG2);
46
47	udelay(500);
48
49	/* Issue PALL */
50	out_be32(&sdram->ctrl, CFG_SYS_SDRAM_CTRL | 2);
51	asm("nop");
52
53	/* Perform two refresh cycles */
54	out_be32(&sdram->ctrl, CFG_SYS_SDRAM_CTRL | 4);
55	out_be32(&sdram->ctrl, CFG_SYS_SDRAM_CTRL | 4);
56	asm("nop");
57
58	/* Issue LEMR */
59	out_be32(&sdram->mode, CFG_SYS_SDRAM_MODE);
60	asm("nop");
61	out_be32(&sdram->mode, CFG_SYS_SDRAM_EMOD);
62	asm("nop");
63
64	out_be32(&sdram->ctrl, CFG_SYS_SDRAM_CTRL | 2);
65	asm("nop");
66
67	out_be32(&sdram->ctrl,
68		(CFG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000c00);
69	asm("nop");
70
71	udelay(100);
72
73	gd->ram_size = dramsize;
74
75	return 0;
76};
77
78int testdram(void)
79{
80	/* TODO: XXX XXX XXX */
81	printf("DRAM test not implemented!\n");
82
83	return (0);
84}
85