diff options
Diffstat (limited to 'u-boot/board/freescale/m52277evb/m52277evb.c')
-rw-r--r-- | u-boot/board/freescale/m52277evb/m52277evb.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/u-boot/board/freescale/m52277evb/m52277evb.c b/u-boot/board/freescale/m52277evb/m52277evb.c new file mode 100644 index 0000000..9109edb --- /dev/null +++ b/u-boot/board/freescale/m52277evb/m52277evb.c @@ -0,0 +1,104 @@ +/* + * (C) Copyright 2000-2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. + * TsiChung Liew (Tsi-Chung.Liew@freescale.com) + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/immap.h> + +DECLARE_GLOBAL_DATA_PTR; + +int checkboard(void) +{ + puts("Board: "); + puts("Freescale M52277 EVB\n"); + return 0; +}; + +phys_size_t initdram(int board_type) +{ + u32 dramsize; + +#ifdef CONFIG_CF_SBF + /* + * Serial Boot: The dram is already initialized in start.S + * only require to return DRAM size + */ + dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000; +#else + volatile sdramc_t *sdram = (volatile sdramc_t *)(MMAP_SDRAM); + volatile gpio_t *gpio = (volatile gpio_t *)(MMAP_GPIO); + u32 i; + + dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000; + + for (i = 0x13; i < 0x20; i++) { + if (dramsize == (1 << i)) + break; + } + i--; + + gpio->mscr_sdram = CONFIG_SYS_SDRAM_DRV_STRENGTH; + + sdram->sdcs0 = (CONFIG_SYS_SDRAM_BASE | i); + + sdram->sdcfg1 = CONFIG_SYS_SDRAM_CFG1; + sdram->sdcfg2 = CONFIG_SYS_SDRAM_CFG2; + + /* Issue PALL */ + sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2; + __asm__("nop"); + + /* Issue LEMR */ + sdram->sdmr = CONFIG_SYS_SDRAM_MODE; + __asm__("nop"); + sdram->sdmr = CONFIG_SYS_SDRAM_EMOD; + __asm__("nop"); + + udelay(1000); + + /* Issue PALL */ + sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2; + __asm__("nop"); + + /* Perform two refresh cycles */ + sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4; + __asm__("nop"); + sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 4; + __asm__("nop"); + + sdram->sdcr = (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000C00; + + udelay(100); +#endif + return (dramsize); +}; + +int testdram(void) +{ + /* TODO: XXX XXX XXX */ + printf("DRAM test not implemented!\n"); + + return (0); +} |