From c5e8885aab9d282fa480cfa359cf5fd84248abb8 Mon Sep 17 00:00:00 2001 From: Bo Shen Date: Fri, 15 Nov 2013 11:12:38 +0800 Subject: arm: atmel: sama5d3: spl boot from fat fs SD card MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Enable Atmel sama5d3xek boart spl boot support, which can load u-boot from SD card with FAT file system. Signed-off-by: Bo Shen Signed-off-by: Andreas Bießmann --- board/atmel/sama5d3xek/sama5d3xek.c | 85 +++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) (limited to 'board/atmel') diff --git a/board/atmel/sama5d3xek/sama5d3xek.c b/board/atmel/sama5d3xek/sama5d3xek.c index f245f98bf7..0ab8020126 100644 --- a/board/atmel/sama5d3xek/sama5d3xek.c +++ b/board/atmel/sama5d3xek/sama5d3xek.c @@ -20,6 +20,9 @@ #include #include #include +#include +#include +#include #ifdef CONFIG_USB_GADGET_ATMEL_USBA #include @@ -296,3 +299,85 @@ void spi_cs_deactivate(struct spi_slave *slave) } } #endif /* CONFIG_ATMEL_SPI */ + +/* SPL */ +#ifdef CONFIG_SPL_BUILD +void spl_board_init(void) +{ +#ifdef CONFIG_SYS_USE_MMC + sama5d3xek_mci_hw_init(); +#endif +} + +static void ddr2_conf(struct atmel_mpddr *ddr2) +{ + ddr2->md = (ATMEL_MPDDRC_MD_DBW_32_BITS | ATMEL_MPDDRC_MD_DDR2_SDRAM); + + ddr2->cr = (ATMEL_MPDDRC_CR_NC_COL_10 | + ATMEL_MPDDRC_CR_NR_ROW_14 | + ATMEL_MPDDRC_CR_CAS_DDR_CAS3 | + ATMEL_MPDDRC_CR_ENRDM_ON | + ATMEL_MPDDRC_CR_NB_8BANKS | + ATMEL_MPDDRC_CR_NDQS_DISABLED | + ATMEL_MPDDRC_CR_DECOD_INTERLEAVED | + ATMEL_MPDDRC_CR_UNAL_SUPPORTED); + /* + * As the DDR2-SDRAm device requires a refresh time is 7.8125us + * when DDR run at 133MHz, so it needs (7.8125us * 133MHz / 10^9) clocks + */ + ddr2->rtr = 0x411; + + ddr2->tpr0 = (6 << ATMEL_MPDDRC_TPR0_TRAS_OFFSET | + 2 << ATMEL_MPDDRC_TPR0_TRCD_OFFSET | + 2 << ATMEL_MPDDRC_TPR0_TWR_OFFSET | + 8 << ATMEL_MPDDRC_TPR0_TRC_OFFSET | + 2 << ATMEL_MPDDRC_TPR0_TRP_OFFSET | + 2 << ATMEL_MPDDRC_TPR0_TRRD_OFFSET | + 2 << ATMEL_MPDDRC_TPR0_TWTR_OFFSET | + 2 << ATMEL_MPDDRC_TPR0_TMRD_OFFSET); + + ddr2->tpr1 = (2 << ATMEL_MPDDRC_TPR1_TXP_OFFSET | + 200 << ATMEL_MPDDRC_TPR1_TXSRD_OFFSET | + 28 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET | + 26 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET); + + ddr2->tpr2 = (7 << ATMEL_MPDDRC_TPR2_TFAW_OFFSET | + 2 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET | + 2 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET | + 7 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET | + 8 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET); +} + +void mem_init(void) +{ + struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + struct atmel_mpddr ddr2; + + ddr2_conf(&ddr2); + + /* enable MPDDR clock */ + at91_periph_clk_enable(ATMEL_ID_MPDDRC); + writel(0x4, &pmc->scer); + + /* DDRAM2 Controller initialize */ + ddr2_init(ATMEL_BASE_DDRCS, &ddr2); +} + +void at91_pmc_init(void) +{ + struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + u32 tmp; + + tmp = AT91_PMC_PLLAR_29 | + AT91_PMC_PLLXR_PLLCOUNT(0x3f) | + AT91_PMC_PLLXR_MUL(43) | + AT91_PMC_PLLXR_DIV(1); + at91_plla_init(tmp); + + writel(0x3 << 8, &pmc->pllicpr); + + tmp = AT91_PMC_MCKR_MDIV_4 | + AT91_PMC_MCKR_CSS_PLLA; + at91_mck_init(tmp); +} +#endif -- cgit v1.2.1