leandrof/u-boot
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ARM: atmel: at91sam9n12ek: enable spl support

Browse Source 
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>
This commit is contained in:
Bo Shen
2015-03-27 14:23:36 +08:00
committed by Andreas Bießmann
parent d85e8914b3
commit ff255e836a
9 changed files with 138 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

73
board/atmel/at91sam9n12ek/at91sam9n12ek.c
View File

@@ -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