m68k: Remove M54418TWR board
[platform/kernel/u-boot.git] / board / freescale / m54451evb / m54451evb.c
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 <common.h>
11 #include <init.h>
12 #include <spi.h>
13 #include <asm/global_data.h>
14 #include <asm/immap.h>
15 #include <asm/io.h>
16 #include <linux/delay.h>
17
18 DECLARE_GLOBAL_DATA_PTR;
19
20 int checkboard(void)
21 {
22         /*
23          * need to to:
24          * Check serial flash size. if 2mb evb, else 8mb demo
25          */
26         puts("Board: ");
27         puts("Freescale M54451 EVB\n");
28         return 0;
29 };
30
31 int dram_init(void)
32 {
33         u32 dramsize;
34 #ifdef CONFIG_CF_SBF
35         /*
36          * Serial Boot: The dram is already initialized in start.S
37          * only require to return DRAM size
38          */
39         dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
40 #else
41         sdramc_t *sdram = (sdramc_t *)(MMAP_SDRAM);
42         gpio_t *gpio = (gpio_t *)(MMAP_GPIO);
43         u32 i;
44
45         dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
46
47         if ((in_be32(&sdram->sdcfg1) == CONFIG_SYS_SDRAM_CFG1) &&
48             (in_be32(&sdram->sdcfg2) == CONFIG_SYS_SDRAM_CFG2))
49                 return dramsize;
50
51         for (i = 0x13; i < 0x20; i++) {
52                 if (dramsize == (1 << i))
53                         break;
54         }
55         i--;
56
57         out_8(&gpio->mscr_sdram, CONFIG_SYS_SDRAM_DRV_STRENGTH);
58
59         out_be32(&sdram->sdcs0, CONFIG_SYS_SDRAM_BASE | i);
60
61         out_be32(&sdram->sdcfg1, CONFIG_SYS_SDRAM_CFG1);
62         out_be32(&sdram->sdcfg2, CONFIG_SYS_SDRAM_CFG2);
63
64         udelay(200);
65
66         /* Issue PALL */
67         out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 2);
68         __asm__("nop");
69
70         /* Perform two refresh cycles */
71         out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
72         __asm__("nop");
73         out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
74         __asm__("nop");
75
76         /* Issue LEMR */
77         out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
78         __asm__("nop");
79         out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
80         __asm__("nop");
81
82         out_be32(&sdram->sdcr,
83                 (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000000);
84
85         udelay(100);
86 #endif
87         gd->ram_size = dramsize;
88
89         return 0;
90 };
91
92 int testdram(void)
93 {
94         /* TODO: XXX XXX XXX */
95         printf("DRAM test not implemented!\n");
96
97         return (0);
98 }