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 --- 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 96fd990..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); }