diff options
| author | Bo Shen <voice.shen@atmel.com> | 2015-03-27 14:23:36 +0800 |
|---|---|---|
| committer | Andreas Bießmann <andreas.devel@googlemail.com> | 2015-04-01 01:04:31 +0200 |
| commit | ff255e836a3a6cd52bd51a192af96ac5f224dc22 (patch) | |
| tree | da9a38c164467a282ccd3e9848bfad029ad797ee /board | |
| parent | d85e8914b379eb3c4d66be241fee29da50166aa2 (diff) | |
ARM: atmel: at91sam9n12ek: enable spl support
Enable SPL support for at91sam9n12ek boards, now it supports
boot up from NAND flash, serial flash.
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Diffstat (limited to 'board')
| -rw-r--r-- | board/atmel/at91sam9n12ek/at91sam9n12ek.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/board/atmel/at91sam9n12ek/at91sam9n12ek.c b/board/atmel/at91sam9n12ek/at91sam9n12ek.c index 9adc9920b4..4f46a03533 100644 --- a/board/atmel/at91sam9n12ek/at91sam9n12ek.c +++ b/board/atmel/at91sam9n12ek/at91sam9n12ek.c @@ -257,3 +257,76 @@ int dram_init(void) CONFIG_SYS_SDRAM_SIZE); return 0; } + +#if defined(CONFIG_SPL_BUILD) +#include <spl.h> +#include <nand.h> + +void at91_spl_board_init(void) +{ +#ifdef CONFIG_SYS_USE_MMC + at91_mci_hw_init(); +#elif CONFIG_SYS_USE_NANDFLASH + at91sam9n12ek_nand_hw_init(); +#elif CONFIG_SYS_USE_SPIFLASH + at91_spi0_hw_init(1 << 4); +#endif +} + +#include <asm/arch/atmel_mpddrc.h> +static void ddr2_conf(struct atmel_mpddr *ddr2) +{ + ddr2->md = (ATMEL_MPDDRC_MD_DBW_16_BITS | ATMEL_MPDDRC_MD_DDR2_SDRAM); + + ddr2->cr = (ATMEL_MPDDRC_CR_NC_COL_10 | + ATMEL_MPDDRC_CR_NR_ROW_13 | + ATMEL_MPDDRC_CR_CAS_DDR_CAS3 | + ATMEL_MPDDRC_CR_NB_8BANKS | + ATMEL_MPDDRC_CR_DECOD_INTERLEAVED); + + 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 | + 19 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET | + 18 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET); + + ddr2->tpr2 = (2 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET | + 3 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET | + 7 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET | + 2 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET); +} + +void mem_init(void) +{ + struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX; + struct atmel_mpddr ddr2; + unsigned long csa; + + ddr2_conf(&ddr2); + + /* enable DDR2 clock */ + writel(0x4, &pmc->scer); + + /* Chip select 1 is for DDR2/SDRAM */ + csa = readl(&matrix->ebicsa); + csa |= AT91_MATRIX_EBI_CS1A_SDRAMC; + csa &= ~AT91_MATRIX_EBI_DBPU_OFF; + csa |= AT91_MATRIX_EBI_DBPD_OFF; + csa |= AT91_MATRIX_EBI_EBI_IOSR_NORMAL; + writel(csa, &matrix->ebicsa); + + /* DDRAM2 Controller initialize */ + ddr2_init(ATMEL_BASE_CS1, &ddr2); +} +#endif |