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 <common.h>
12 #include <spi.h>
13 #include <asm/immap.h>
14 #include <asm/io.h>
15
16 DECLARE_GLOBAL_DATA_PTR;
17
checkboard(void)18 int checkboard(void)
19 {
20 /*
21 * need to to:
22 * Check serial flash size. if 2mb evb, else 8mb demo
23 */
24 puts("Board: ");
25 puts("Freescale M54451 EVB\n");
26 return 0;
27 };
28
dram_init(void)29 int dram_init(void)
30 {
31 u32 dramsize;
32 #ifdef CONFIG_CF_SBF
33 /*
34 * Serial Boot: The dram is already initialized in start.S
35 * only require to return DRAM size
36 */
37 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
38 #else
39 sdramc_t *sdram = (sdramc_t *)(MMAP_SDRAM);
40 gpio_t *gpio = (gpio_t *)(MMAP_GPIO);
41 u32 i;
42
43 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
44
45 if ((in_be32(&sdram->sdcfg1) == CONFIG_SYS_SDRAM_CFG1) &&
46 (in_be32(&sdram->sdcfg2) == CONFIG_SYS_SDRAM_CFG2))
47 return dramsize;
48
49 for (i = 0x13; i < 0x20; i++) {
50 if (dramsize == (1 << i))
51 break;
52 }
53 i--;
54
55 out_8(&gpio->mscr_sdram, CONFIG_SYS_SDRAM_DRV_STRENGTH);
56
57 out_be32(&sdram->sdcs0, CONFIG_SYS_SDRAM_BASE | i);
58
59 out_be32(&sdram->sdcfg1, CONFIG_SYS_SDRAM_CFG1);
60 out_be32(&sdram->sdcfg2, CONFIG_SYS_SDRAM_CFG2);
61
62 udelay(200);
63
64 /* Issue PALL */
65 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 2);
66 __asm__("nop");
67
68 /* Perform two refresh cycles */
69 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
70 __asm__("nop");
71 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
72 __asm__("nop");
73
74 /* Issue LEMR */
75 out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
76 __asm__("nop");
77 out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
78 __asm__("nop");
79
80 out_be32(&sdram->sdcr,
81 (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000000);
82
83 udelay(100);
84 #endif
85 gd->ram_size = dramsize;
86
87 return 0;
88 };
89
testdram(void)90 int testdram(void)
91 {
92 /* TODO: XXX XXX XXX */
93 printf("DRAM test not implemented!\n");
94
95 return (0);
96 }
97