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| author | Steve Sakoman <steve@sakoman.com> | 2010-08-19 20:09:57 -0700 |
|---|---|---|
| committer | Sandeep Paulraj <s-paulraj@ti.com> | 2010-09-08 14:51:24 -0400 |
| commit | 3667cbeed5e3c4067e624e52a916b1ebb02c8f05 (patch) | |
| tree | 43be961b21a7ba663e8312310cf378a259b13085 /arch/arm/cpu | |
| parent | 543431b66dd9f3526f23546cac962c29ad0f485a (diff) | |
| download | u-boot-imx-3667cbeed5e3c4067e624e52a916b1ebb02c8f05.zip u-boot-imx-3667cbeed5e3c4067e624e52a916b1ebb02c8f05.tar.gz u-boot-imx-3667cbeed5e3c4067e624e52a916b1ebb02c8f05.tar.bz2 | |
ARMV7: OMAP3: Remove erroneous hard coded sdram setup for 128MB/bank
Upcoming Beagle and Overo revisions use POP memory with 256MB or 512MB
per bank. This patches uses the SDRC settings from x-load or the config
header to set up timing properly.
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Diffstat (limited to 'arch/arm/cpu')
| -rw-r--r-- | arch/arm/cpu/armv7/omap3/sdrc.c | 43 |
1 files changed, 21 insertions, 22 deletions
diff --git a/arch/arm/cpu/armv7/omap3/sdrc.c b/arch/arm/cpu/armv7/omap3/sdrc.c index 96fd990c..8905224 100644 --- a/arch/arm/cpu/armv7/omap3/sdrc.c +++ b/arch/arm/cpu/armv7/omap3/sdrc.c @@ -107,18 +107,12 @@ u32 get_sdr_cs_offset(u32 cs) /* * do_sdrc_init - * - Initialize the SDRAM for use. - * - Sets up SDRC timings for CS0 * - code called once in C-Stack only context for CS0 and a possible 2nd * time depending on memory configuration from stack+global context */ void do_sdrc_init(u32 cs, u32 early) { - struct sdrc_actim *sdrc_actim_base; - - if (cs) - sdrc_actim_base = (struct sdrc_actim *)SDRC_ACTIM_CTRL1_BASE; - else - sdrc_actim_base = (struct sdrc_actim *)SDRC_ACTIM_CTRL0_BASE; + struct sdrc_actim *sdrc_actim_base0, *sdrc_actim_base1; if (early) { /* reset sdrc controller */ @@ -138,24 +132,29 @@ void do_sdrc_init(u32 cs, u32 early) sdelay(0x20000); } - writel(RASWIDTH_13BITS | CASWIDTH_10BITS | ADDRMUXLEGACY | - RAMSIZE_128 | BANKALLOCATION | B32NOT16 | B32NOT16 | - DEEPPD | DDR_SDRAM, &sdrc_base->cs[cs].mcfg); - writel(ARCV | ARE_ARCV_1, &sdrc_base->cs[cs].rfr_ctrl); - writel(V_ACTIMA_165, &sdrc_actim_base->ctrla); - writel(V_ACTIMB_165, &sdrc_actim_base->ctrlb); - - writel(CMD_NOP, &sdrc_base->cs[cs].manual); - writel(CMD_PRECHARGE, &sdrc_base->cs[cs].manual); - writel(CMD_AUTOREFRESH, &sdrc_base->cs[cs].manual); - writel(CMD_AUTOREFRESH, &sdrc_base->cs[cs].manual); - /* - * CAS latency 3, Write Burst = Read Burst, Serial Mode, - * Burst length = 4 + * SDRC timings are set up by x-load or config header + * We don't need to redo them here. + * Older x-loads configure only CS0 + * configure CS1 to handle this ommission */ - writel(CASL3 | BURSTLENGTH4, &sdrc_base->cs[cs].mr); + if (cs) { + sdrc_actim_base0 = (struct sdrc_actim *)SDRC_ACTIM_CTRL0_BASE; + sdrc_actim_base1 = (struct sdrc_actim *)SDRC_ACTIM_CTRL1_BASE; + writel(readl(&sdrc_base->cs[CS0].mcfg), + &sdrc_base->cs[CS1].mcfg); + writel(readl(&sdrc_base->cs[CS0].rfr_ctrl), + &sdrc_base->cs[CS1].rfr_ctrl); + writel(readl(&sdrc_actim_base0->ctrla), + &sdrc_actim_base1->ctrla); + writel(readl(&sdrc_actim_base0->ctrlb), + &sdrc_actim_base1->ctrlb); + } + /* + * Test ram in this bank + * Disable if bad or not present + */ if (!mem_ok(cs)) writel(0, &sdrc_base->cs[cs].mcfg); } |