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/*
* 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,
SDRAM_DATA_32BIT,
} 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 */
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