arm: at91/spl: mpddrc: use IP version to check configuration
To remove the unnecessary #ifdef-endif, use the mpddrc IP version
to check whether or not the interleaved decoding type is supported.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/arch/arm/mach-at91/mpddrc.c b/arch/arm/mach-at91/mpddrc.c
index 1e1ff1d..16e089c 100644
--- a/arch/arm/mach-at91/mpddrc.c
+++ b/arch/arm/mach-at91/mpddrc.c
@@ -12,6 +12,8 @@
#include <asm/io.h>
#include <asm/arch/atmel_mpddrc.h>
+#define SAMA5D3_MPDDRC_VERSION 0x140
+
static inline void atmel_mpddr_op(const struct atmel_mpddr *mpddr,
int mode,
u32 ram_address)
@@ -20,13 +22,15 @@
writel(0, ram_address);
}
-static int ddr2_decodtype_is_seq(u32 cr)
+static int ddr2_decodtype_is_seq(const unsigned int base, u32 cr)
{
-#if defined(CONFIG_SAMA5D3) || defined(CONFIG_SAMA5D4) || \
- defined(CONFIG_AT91SAM9X5) || defined(CONFIG_AT91SAM9N12)
- if (cr & ATMEL_MPDDRC_CR_DECOD_INTERLEAVED)
+ struct atmel_mpddr *mpddr = (struct atmel_mpddr *)base;
+ u16 version = readl(&mpddr->version) & 0xffff;
+
+ if ((version >= SAMA5D3_MPDDRC_VERSION) &&
+ (cr & ATMEL_MPDDRC_CR_DECOD_INTERLEAVED))
return 0;
-#endif
+
return 1;
}
@@ -41,7 +45,7 @@
/* Compute bank offset according to NC in configuration register */
ba_off = (mpddr_value->cr & ATMEL_MPDDRC_CR_NC_MASK) + 9;
- if (ddr2_decodtype_is_seq(mpddr_value->cr))
+ if (ddr2_decodtype_is_seq(base, mpddr_value->cr))
ba_off += ((mpddr_value->cr & ATMEL_MPDDRC_CR_NR_MASK) >> 2) + 11;
ba_off += (mpddr_value->md & ATMEL_MPDDRC_MD_DBW_MASK) ? 1 : 2;
@@ -148,7 +152,7 @@
/* Compute bank offset according to NC in configuration register */
ba_off = (mpddr_value->cr & ATMEL_MPDDRC_CR_NC_MASK) + 9;
- if (ddr2_decodtype_is_seq(mpddr_value->cr))
+ if (ddr2_decodtype_is_seq(base, mpddr_value->cr))
ba_off += ((mpddr_value->cr &
ATMEL_MPDDRC_CR_NR_MASK) >> 2) + 11;