1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2000-2003
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Copyright (C) 2004-2008, 2012 Freescale Semiconductor, Inc.
7 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
13 #include <asm/immap.h>
15 #include <linux/delay.h>
17 DECLARE_GLOBAL_DATA_PTR;
23 * Check serial flash size. if 2mb evb, else 8mb demo
26 puts("Freescale M54451 EVB\n");
35 * Serial Boot: The dram is already initialized in start.S
36 * only require to return DRAM size
38 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
40 sdramc_t *sdram = (sdramc_t *)(MMAP_SDRAM);
41 gpio_t *gpio = (gpio_t *)(MMAP_GPIO);
44 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
46 if ((in_be32(&sdram->sdcfg1) == CONFIG_SYS_SDRAM_CFG1) &&
47 (in_be32(&sdram->sdcfg2) == CONFIG_SYS_SDRAM_CFG2))
50 for (i = 0x13; i < 0x20; i++) {
51 if (dramsize == (1 << i))
56 out_8(&gpio->mscr_sdram, CONFIG_SYS_SDRAM_DRV_STRENGTH);
58 out_be32(&sdram->sdcs0, CONFIG_SYS_SDRAM_BASE | i);
60 out_be32(&sdram->sdcfg1, CONFIG_SYS_SDRAM_CFG1);
61 out_be32(&sdram->sdcfg2, CONFIG_SYS_SDRAM_CFG2);
66 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 2);
69 /* Perform two refresh cycles */
70 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
72 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
76 out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
78 out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
81 out_be32(&sdram->sdcr,
82 (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000000);
86 gd->ram_size = dramsize;
93 /* TODO: XXX XXX XXX */
94 printf("DRAM test not implemented!\n");