1 files changed, 53 insertions, 0 deletions
diff --git a/arch/avr32/include/asm/sdram.h b/arch/avr32/include/asm/sdram.h
new file mode 100644
index 0000000000..762acfa078
--- /dev/null
+++ b/arch/avr32/include/asm/sdram.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#ifndef __ASM_AVR32_SDRAM_H
+#define __ASM_AVR32_SDRAM_H
+
+struct sdram_config {
+	/* Number of data bits. */
+	enum {
+		SDRAM_DATA_16BIT = 16,
+		SDRAM_DATA_32BIT = 32,
+	} data_bits;
+
+	/* Number of address bits */
+	uint8_t row_bits, col_bits, bank_bits;
+
+	/* SDRAM timings in cycles */
+	uint8_t cas, twr, trc, trp, trcd, tras, txsr;
+
+	/* SDRAM refresh period in cycles */
+	unsigned long refresh_period;
+};
+
+/*
+ * Attempt to initialize the SDRAM controller using the specified
+ * parameters. Return the expected size of the memory area based on
+ * the number of address and data bits.
+ *
+ * The caller should verify that the configuration is correct by
+ * running a memory test, e.g. get_ram_size().
+ */
+extern unsigned long sdram_init(void *sdram_base,
+			const struct sdram_config *config);
+
+#endif /* __ASM_AVR32_SDRAM_H */