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)
12 #include <asm/immap.h>
15 DECLARE_GLOBAL_DATA_PTR;
21 * Check serial flash size. if 2mb evb, else 8mb demo
24 puts("Freescale M54451 EVB\n");
33 * Serial Boot: The dram is already initialized in start.S
34 * only require to return DRAM size
36 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
38 sdramc_t *sdram = (sdramc_t *)(MMAP_SDRAM);
39 gpio_t *gpio = (gpio_t *)(MMAP_GPIO);
42 dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
44 if ((in_be32(&sdram->sdcfg1) == CONFIG_SYS_SDRAM_CFG1) &&
45 (in_be32(&sdram->sdcfg2) == CONFIG_SYS_SDRAM_CFG2))
48 for (i = 0x13; i < 0x20; i++) {
49 if (dramsize == (1 << i))
54 out_8(&gpio->mscr_sdram, CONFIG_SYS_SDRAM_DRV_STRENGTH);
56 out_be32(&sdram->sdcs0, CONFIG_SYS_SDRAM_BASE | i);
58 out_be32(&sdram->sdcfg1, CONFIG_SYS_SDRAM_CFG1);
59 out_be32(&sdram->sdcfg2, CONFIG_SYS_SDRAM_CFG2);
64 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 2);
67 /* Perform two refresh cycles */
68 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
70 out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
74 out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
76 out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
79 out_be32(&sdram->sdcr,
80 (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000000);
84 gd->ram_size = dramsize;
91 /* TODO: XXX XXX XXX */
92 printf("DRAM test not implemented!\n");