diff options
Diffstat (limited to 'board/freescale/m5275evb/m5275evb.c')
| -rw-r--r-- | board/freescale/m5275evb/m5275evb.c | 50 |
1 files changed, 27 insertions, 23 deletions
diff --git a/board/freescale/m5275evb/m5275evb.c b/board/freescale/m5275evb/m5275evb.c index 35c9b20..1bbe5a3 100644 --- a/board/freescale/m5275evb/m5275evb.c +++ b/board/freescale/m5275evb/m5275evb.c @@ -4,6 +4,8 @@ * * Copyright (C) 2005-2008 Arthur Shipkowski (art@videon-central.com) * + * Copyright (C) 2012 Freescale Semiconductor, Inc. All Rights Reserved. + * * See file CREDITS for list of people who contributed to this * project. * @@ -25,6 +27,7 @@ #include <common.h> #include <asm/immap.h> +#include <asm/io.h> #define PERIOD 13 /* system bus period in ns */ #define SDRAM_TREFI 7800 /* in ns */ @@ -38,67 +41,68 @@ int checkboard(void) phys_size_t initdram(int board_type) { - volatile sdramctrl_t *sdp = (sdramctrl_t *)(MMAP_SDRAM); - volatile gpio_t *gpio_reg = (gpio_t *)(MMAP_GPIO); + sdramctrl_t *sdp = (sdramctrl_t *)(MMAP_SDRAM); + gpio_t *gpio_reg = (gpio_t *)(MMAP_GPIO); - gpio_reg->par_sdram = 0x3FF; /* Enable SDRAM */ + /* Enable SDRAM */ + out_be16(&gpio_reg->par_sdram, 0x3FF); /* Set up chip select */ - sdp->sdbar0 = CONFIG_SYS_SDRAM_BASE; - sdp->sdbmr0 = MCF_SDRAMC_SDMRn_BAM_32M | MCF_SDRAMC_SDMRn_V; + out_be32(&sdp->sdbar0, CONFIG_SYS_SDRAM_BASE); + out_be32(&sdp->sdbmr0, MCF_SDRAMC_SDMRn_BAM_32M | MCF_SDRAMC_SDMRn_V); /* Set up timing */ - sdp->sdcfg1 = 0x83711630; - sdp->sdcfg2 = 0x46770000; + out_be32(&sdp->sdcfg1, 0x83711630); + out_be32(&sdp->sdcfg2, 0x46770000); /* Enable clock */ - sdp->sdcr = MCF_SDRAMC_SDCR_MODE_EN | MCF_SDRAMC_SDCR_CKE; + out_be32(&sdp->sdcr, MCF_SDRAMC_SDCR_MODE_EN | MCF_SDRAMC_SDCR_CKE); /* Set precharge */ - sdp->sdcr |= MCF_SDRAMC_SDCR_IPALL; + setbits_be32(&sdp->sdcr, MCF_SDRAMC_SDCR_IPALL); /* Dummy write to start SDRAM */ *((volatile unsigned long *)CONFIG_SYS_SDRAM_BASE) = 0xa5a59696; /* Send LEMR */ - sdp->sdmr = MCF_SDRAMC_SDMR_BNKAD_LEMR - | MCF_SDRAMC_SDMR_AD(0x0) - | MCF_SDRAMC_SDMR_CMD; + setbits_be32(&sdp->sdmr, + MCF_SDRAMC_SDMR_BNKAD_LEMR | MCF_SDRAMC_SDMR_AD(0x0) | + MCF_SDRAMC_SDMR_CMD); *((volatile unsigned long *)CONFIG_SYS_SDRAM_BASE) = 0xa5a59696; /* Send LMR */ - sdp->sdmr = 0x058d0000; + out_be32(&sdp->sdmr, 0x058d0000); *((volatile unsigned long *)CONFIG_SYS_SDRAM_BASE) = 0xa5a59696; /* Stop sending commands */ - sdp->sdmr &= ~(MCF_SDRAMC_SDMR_CMD); + clrbits_be32(&sdp->sdmr, MCF_SDRAMC_SDMR_CMD); /* Set precharge */ - sdp->sdcr |= MCF_SDRAMC_SDCR_IPALL; + setbits_be32(&sdp->sdcr, MCF_SDRAMC_SDCR_IPALL); *((volatile unsigned long *)CONFIG_SYS_SDRAM_BASE) = 0xa5a59696; /* Stop manual precharge, send 2 IREF */ - sdp->sdcr &= ~(MCF_SDRAMC_SDCR_IPALL); - sdp->sdcr |= MCF_SDRAMC_SDCR_IREF; + clrbits_be32(&sdp->sdcr, MCF_SDRAMC_SDCR_IPALL); + setbits_be32(&sdp->sdcr, MCF_SDRAMC_SDCR_IREF); *((volatile unsigned long *)CONFIG_SYS_SDRAM_BASE) = 0xa5a59696; *((volatile unsigned long *)CONFIG_SYS_SDRAM_BASE) = 0xa5a59696; - /* Write mode register, clear reset DLL */ - sdp->sdmr = 0x018d0000; + + out_be32(&sdp->sdmr, 0x018d0000); *((volatile unsigned long *)CONFIG_SYS_SDRAM_BASE) = 0xa5a59696; /* Stop sending commands */ - sdp->sdmr &= ~(MCF_SDRAMC_SDMR_CMD); - sdp->sdcr &= ~(MCF_SDRAMC_SDCR_MODE_EN); + clrbits_be32(&sdp->sdmr, MCF_SDRAMC_SDMR_CMD); + clrbits_be32(&sdp->sdcr, MCF_SDRAMC_SDCR_MODE_EN); /* Turn on auto refresh, lock SDMR */ - sdp->sdcr = + out_be32(&sdp->sdcr, MCF_SDRAMC_SDCR_CKE | MCF_SDRAMC_SDCR_REF | MCF_SDRAMC_SDCR_MUX(1) /* 1 added to round up */ | MCF_SDRAMC_SDCR_RCNT((SDRAM_TREFI/(PERIOD*64)) - 1 + 1) - | MCF_SDRAMC_SDCR_DQS_OE(0x3); + | MCF_SDRAMC_SDCR_DQS_OE(0x3)); return CONFIG_SYS_SDRAM_SIZE * 1024 * 1024; }; |