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| author | Matthew McClintock <msm@freescale.com> | 2012-08-13 08:10:37 +0000 |
|---|---|---|
| committer | Andy Fleming <afleming@freescale.com> | 2012-08-23 10:24:16 -0500 |
| commit | 9c6b47d53ed329b31c5f26e9ec710f67559c07f0 (patch) | |
| tree | e249bf392017d29d3a90389685ac2f972c5fc4a9 /nand_spl | |
| parent | be7bebeac24f33bd7eef2f5047579c1a680d8df1 (diff) | |
| download | u-boot-imx-9c6b47d53ed329b31c5f26e9ec710f67559c07f0.zip u-boot-imx-9c6b47d53ed329b31c5f26e9ec710f67559c07f0.tar.gz u-boot-imx-9c6b47d53ed329b31c5f26e9ec710f67559c07f0.tar.bz2 | |
p1014rdb: set ddr bus width properly depending on SVR
Currently, for NAND boot for the P1010/4RDB we hard code the DDR
configuration. We can still dynamically set the DDR bus width in
the nand spl so the P1010/4RDB boards can boot from the same
u-boot image
Signed-off-by: Matthew McClintock <msm@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Diffstat (limited to 'nand_spl')
| -rw-r--r-- | nand_spl/board/freescale/p1010rdb/nand_boot.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/nand_spl/board/freescale/p1010rdb/nand_boot.c b/nand_spl/board/freescale/p1010rdb/nand_boot.c index 16eeb61..1f89ab5 100644 --- a/nand_spl/board/freescale/p1010rdb/nand_boot.c +++ b/nand_spl/board/freescale/p1010rdb/nand_boot.c @@ -35,6 +35,7 @@ unsigned long ddr_freq_mhz; void sdram_init(void) { ccsr_ddr_t *ddr = (ccsr_ddr_t *)CONFIG_SYS_MPC85xx_DDR_ADDR; + u32 svr = mfspr(SPRN_SVR); out_be32(&ddr->sdram_cfg, CONFIG_SYS_DDR_CONTROL | SDRAM_CFG_32_BE); out_be32(&ddr->cs0_bnds, CONFIG_SYS_DDR_CS0_BNDS); @@ -70,6 +71,16 @@ void sdram_init(void) out_be32(&ddr->timing_cfg_5, CONFIG_SYS_DDR_TIMING_5); out_be32(&ddr->ddr_zq_cntl, CONFIG_SYS_DDR_ZQ_CONTROL); + /* P1014 and it's derivatives support max 16bit DDR width */ + if (svr == SVR_P1014) { + __raw_writel(ddr->sdram_cfg & ~SDRAM_CFG_DBW_MASK, &ddr->sdram_cfg); + __raw_writel(ddr->sdram_cfg | SDRAM_CFG_16_BE, &ddr->sdram_cfg); + /* For CS0_BNDS we divide the start and end address by 2, so we can just + * shift the entire register to achieve the desired result and the mask + * the value so we don't write reserved fields */ + __raw_writel((CONFIG_SYS_DDR_CS0_BNDS >> 1) & 0x0fff0fff, &ddr->cs0_bnds); + } + /* mimic 500us delay, with busy isync() loop */ udelay(100); |