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Diffstat (limited to 'arch/arm/mach-pxa/pxa2xx.c')
-rw-r--r--arch/arm/mach-pxa/pxa2xx.c32
1 files changed, 29 insertions, 3 deletions
diff --git a/arch/arm/mach-pxa/pxa2xx.c b/arch/arm/mach-pxa/pxa2xx.c
index 2d26cd2afbf3..4aafd692c1e8 100644
--- a/arch/arm/mach-pxa/pxa2xx.c
+++ b/arch/arm/mach-pxa/pxa2xx.c
@@ -12,10 +12,12 @@
#include <linux/device.h>
#include <linux/io.h>
-#include <mach/hardware.h>
-#include <mach/pxa2xx-regs.h>
+#include "pxa2xx-regs.h"
#include "mfp-pxa25x.h"
-#include <mach/reset.h>
+#include "generic.h"
+#include "reset.h"
+#include "smemc.h"
+#include <linux/soc/pxa/smemc.h>
#include <linux/platform_data/irda-pxaficp.h>
void pxa2xx_clear_reset_status(unsigned int mask)
@@ -51,3 +53,27 @@ void pxa2xx_transceiver_mode(struct device *dev, int mode)
BUG();
}
EXPORT_SYMBOL_GPL(pxa2xx_transceiver_mode);
+
+#define MDCNFG_DRAC2(mdcnfg) (((mdcnfg) >> 21) & 0x3)
+#define MDCNFG_DRAC0(mdcnfg) (((mdcnfg) >> 5) & 0x3)
+
+int pxa2xx_smemc_get_sdram_rows(void)
+{
+ static int sdram_rows;
+ unsigned int drac2 = 0, drac0 = 0;
+ u32 mdcnfg;
+
+ if (sdram_rows)
+ return sdram_rows;
+
+ mdcnfg = readl_relaxed(MDCNFG);
+
+ if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
+ drac2 = MDCNFG_DRAC2(mdcnfg);
+
+ if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1))
+ drac0 = MDCNFG_DRAC0(mdcnfg);
+
+ sdram_rows = 1 << (11 + max(drac0, drac2));
+ return sdram_rows;
+}