Merge branch 'master' of git://git.denx.de/u-boot-arm

[platform/kernel/u-boot.git] / arch / arm / include / asm / emif.h

diff --git a/arch/arm/include/asm/emif.h b/arch/arm/include/asm/emif.h
index d9d521a..45668ca 100644 (file)
--- a/arch/arm/include/asm/emif.h
+++ b/arch/arm/include/asm/emif.h
@@ -14,11 +14,15 @@
 #define _EMIF_H_
 #include <asm/types.h>
 #include <common.h>
+#include <asm/io.h>
 
 /* Base address */
 #define EMIF1_BASE                             0x4c000000
 #define EMIF2_BASE                             0x4d000000
 
+#define EMIF_4D                                        0x4
+#define EMIF_4D5                               0x5
+
 /* Registers shifts, masks and values */
 
 /* EMIF_MOD_ID_REV */
@@ -1148,6 +1152,28 @@ struct read_write_regs {
        u32 write_reg;
 };
 
+static inline u32 get_emif_rev(u32 base)
+{
+       struct emif_reg_struct *emif = (struct emif_reg_struct *)base;
+
+       return (readl(&emif->emif_mod_id_rev) & EMIF_REG_MAJOR_REVISION_MASK)
+               >> EMIF_REG_MAJOR_REVISION_SHIFT;
+}
+
+/*
+ * Get SDRAM type connected to EMIF.
+ * Assuming similar SDRAM parts are connected to both EMIF's
+ * which is typically the case. So it is sufficient to get
+ * SDRAM type from EMIF1.
+ */
+static inline u32 emif_sdram_type(void)
+{
+       struct emif_reg_struct *emif = (struct emif_reg_struct *)EMIF1_BASE;
+
+       return (readl(&emif->emif_sdram_config) &
+               EMIF_REG_SDRAM_TYPE_MASK) >> EMIF_REG_SDRAM_TYPE_SHIFT;
+}
+
 /* assert macros */
 #if defined(DEBUG)
 #define emif_assert(c) ({ if (!(c)) for (;;); })