diff options
Diffstat (limited to 'board/freescale/m52277evb/m52277evb.c')
| -rw-r--r-- | board/freescale/m52277evb/m52277evb.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/board/freescale/m52277evb/m52277evb.c b/board/freescale/m52277evb/m52277evb.c index 838a6de..9109edb 100644 --- a/board/freescale/m52277evb/m52277evb.c +++ b/board/freescale/m52277evb/m52277evb.c @@ -38,8 +38,18 @@ int checkboard(void) 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); - u32 dramsize, i; + volatile gpio_t *gpio = (volatile gpio_t *)(MMAP_GPIO); + u32 i; dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000; @@ -49,6 +59,8 @@ phys_size_t initdram(int board_type) } i--; + gpio->mscr_sdram = CONFIG_SYS_SDRAM_DRV_STRENGTH; + sdram->sdcs0 = (CONFIG_SYS_SDRAM_BASE | i); sdram->sdcfg1 = CONFIG_SYS_SDRAM_CFG1; @@ -56,24 +68,30 @@ phys_size_t initdram(int board_type) /* Issue PALL */ sdram->sdcr = CONFIG_SYS_SDRAM_CTRL | 2; + __asm__("nop"); /* Issue LEMR */ - /*sdram->sdmr = CONFIG_SYS_SDRAM_EMOD; */ 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; + sdram->sdcr = (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000C00; udelay(100); - +#endif return (dramsize); }; |