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  * SPDX-License-Identifier:	GPL-2.0+
9  */
10 
11 #include <config.h>
12 #include <common.h>
13 #include <asm/immap.h>
14 #include <asm/io.h>
15 
16 DECLARE_GLOBAL_DATA_PTR;
17 
18 int checkboard(void)
19 {
20 	puts("Board: ");
21 	puts("Freescale M53017EVB\n");
22 	return 0;
23 };
24 
25 int dram_init(void)
26 {
27 	sdram_t *sdram = (sdram_t *)(MMAP_SDRAM);
28 	u32 dramsize, i;
29 
30 	dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
31 
32 	for (i = 0x13; i < 0x20; i++) {
33 		if (dramsize == (1 << i))
34 			break;
35 	}
36 	i--;
37 
38 	out_be32(&sdram->cs0, CONFIG_SYS_SDRAM_BASE | i);
39 #ifdef CONFIG_SYS_SDRAM_BASE1
40 	out_be32(&sdram->cs1, CONFIG_SYS_SDRAM_BASE | i);
41 #endif
42 	out_be32(&sdram->cfg1, CONFIG_SYS_SDRAM_CFG1);
43 	out_be32(&sdram->cfg2, CONFIG_SYS_SDRAM_CFG2);
44 
45 	udelay(500);
46 
47 	/* Issue PALL */
48 	out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
49 	asm("nop");
50 
51 	/* Perform two refresh cycles */
52 	out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
53 	out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
54 	asm("nop");
55 
56 	/* Issue LEMR */
57 	out_be32(&sdram->mode, CONFIG_SYS_SDRAM_MODE);
58 	asm("nop");
59 	out_be32(&sdram->mode, CONFIG_SYS_SDRAM_EMOD);
60 	asm("nop");
61 
62 	out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
63 	asm("nop");
64 
65 	out_be32(&sdram->ctrl,
66 		(CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000c00);
67 	asm("nop");
68 
69 	udelay(100);
70 
71 	gd->ram_size = dramsize;
72 
73 	return 0;
74 };
75 
76 int testdram(void)
77 {
78 	/* TODO: XXX XXX XXX */
79 	printf("DRAM test not implemented!\n");
80 
81 	return (0);
82 }
83