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-rw-r--r--arch/arm/cpu/armv7/omap3/sdrc.c116
1 files changed, 61 insertions, 55 deletions
diff --git a/arch/arm/cpu/armv7/omap3/sdrc.c b/arch/arm/cpu/armv7/omap3/sdrc.c
index 66ce33f..2756024 100644
--- a/arch/arm/cpu/armv7/omap3/sdrc.c
+++ b/arch/arm/cpu/armv7/omap3/sdrc.c
@@ -108,14 +108,45 @@ u32 get_sdr_cs_offset(u32 cs)
}
/*
+ * write_sdrc_timings -
+ * - Takes CS and associated timings and initalize SDRAM
+ * - Test CS to make sure it's OK for use
+ */
+static void write_sdrc_timings(u32 cs, struct sdrc_actim *sdrc_actim_base,
+ u32 mcfg, u32 ctrla, u32 ctrlb, u32 rfr_ctrl, u32 mr)
+{
+ /* Setup timings we got from the board. */
+ writel(mcfg, &sdrc_base->cs[cs].mcfg);
+ writel(ctrla, &sdrc_actim_base->ctrla);
+ writel(ctrlb, &sdrc_actim_base->ctrlb);
+ writel(rfr_ctrl, &sdrc_base->cs[cs].rfr_ctrl);
+ 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);
+ writel(mr, &sdrc_base->cs[cs].mr);
+
+ /*
+ * Test ram in this bank
+ * Disable if bad or not present
+ */
+ if (!mem_ok(cs))
+ writel(0, &sdrc_base->cs[cs].mcfg);
+}
+
+/*
* do_sdrc_init -
- * - Initialize the SDRAM for use.
- * - code called once in C-Stack only context for CS0 and a possible 2nd
- * time depending on memory configuration from stack+global context
+ * - Code called once in C-Stack only context for CS0 and with early being
+ * true 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_base0, *sdrc_actim_base1;
+ u32 mcfg, ctrla, ctrlb, rfr_ctrl, mr;
+
+ sdrc_actim_base0 = (struct sdrc_actim *)SDRC_ACTIM_CTRL0_BASE;
+ sdrc_actim_base1 = (struct sdrc_actim *)SDRC_ACTIM_CTRL1_BASE;
if (early) {
/* reset sdrc controller */
@@ -127,73 +158,48 @@ void do_sdrc_init(u32 cs, u32 early)
/* setup sdrc to ball mux */
writel(SDRC_SHARING, &sdrc_base->sharing);
- /* Disable Power Down of CKE cuz of 1 CKE on combo part */
+ /* Disable Power Down of CKE because of 1 CKE on combo part */
writel(WAKEUPPROC | SRFRONRESET | PAGEPOLICY_HIGH,
&sdrc_base->power);
writel(ENADLL | DLLPHASE_90, &sdrc_base->dlla_ctrl);
sdelay(0x20000);
- }
-
/* As long as V_MCFG and V_RFR_CTRL is not defined for all OMAP3 boards we need
* to prevent this to be build in non-SPL build */
#ifdef CONFIG_SPL_BUILD
- /* If we use a SPL there is no x-loader nor config header so we have
- * to do the job ourselfs
- */
- if (cs == CS0) {
- sdrc_actim_base0 = (struct sdrc_actim *)SDRC_ACTIM_CTRL0_BASE;
-
- /* General SDRC config */
- writel(V_MCFG, &sdrc_base->cs[cs].mcfg);
- writel(V_RFR_CTRL, &sdrc_base->cs[cs].rfr_ctrl);
-
- /* AC timings */
- writel(V_ACTIMA_165, &sdrc_actim_base0->ctrla);
- writel(V_ACTIMB_165, &sdrc_actim_base0->ctrlb);
-
- /* Initialize */
- 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);
+ /*
+ * If we use a SPL there is no x-loader nor config header so
+ * we have to do the job ourselfs
+ */
+
+ mcfg = V_MCFG;
+ ctrla = V_ACTIMA_165;
+ ctrlb = V_ACTIMB_165;
+ rfr_ctrl = V_RFR_CTRL;
+ mr = V_MR;
+
+ write_sdrc_timings(CS0, sdrc_actim_base0, mcfg, ctrla, ctrlb,
+ rfr_ctrl, mr);
+#endif
- writel(V_MR, &sdrc_base->cs[cs].mr);
}
-#endif
/*
- * 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
+ * If we aren't using SPL we have been loaded by some
+ * other means which may not have correctly initialized
+ * both CS0 and CS1 (such as some older versions of x-loader)
+ * so we may be asked now to setup CS1.
*/
if (cs == CS1) {
- 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);
-
- 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);
- writel(readl(&sdrc_base->cs[CS0].mr),
- &sdrc_base->cs[CS1].mr);
- }
+ mcfg = readl(&sdrc_base->cs[CS0].mcfg),
+ rfr_ctrl = readl(&sdrc_base->cs[CS0].rfr_ctrl);
+ ctrla = readl(&sdrc_actim_base0->ctrla),
+ ctrlb = readl(&sdrc_actim_base0->ctrlb);
+ mr = readl(&sdrc_base->cs[CS0].mr);
+ write_sdrc_timings(cs, sdrc_actim_base1, mcfg, ctrla, ctrlb,
+ rfr_ctrl, mr);
- /*
- * Test ram in this bank
- * Disable if bad or not present
- */
- if (!mem_ok(cs))
- writel(0, &sdrc_base->cs[cs].mcfg);
+ }
}
/*