projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 7b64fef3 WD |
1 | /* |
| 2 | * Copyright (C) 2006 Atmel Corporation | |
| 3 | * | |
| 4 | * See file CREDITS for list of people who contributed to this | |
| 5 | * project. | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU General Public License as | |
| 9 | * published by the Free Software Foundation; either version 2 of | |
| 10 | * the License, or (at your option) any later version. | |
| 11 | * | |
| 12 | * This program is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | * GNU General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU General Public License | |
| 18 | * along with this program; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
| 20 | * MA 02111-1307 USA | |
| 21 | */ | |
| 22 | #ifndef __ASM_AVR32_SDRAM_H | |
| 23 | #define __ASM_AVR32_SDRAM_H | |
| 24 | ||
| a23e277c HS |
25 | struct sdram_config { |
| 26 | /* Number of data bits. */ | |
| 27 | enum { | |
| 4c24e828 HS |
28 | SDRAM_DATA_16BIT = 16, |
| 29 | SDRAM_DATA_32BIT = 32, | |
| a23e277c HS |
30 | } data_bits; |
| 31 | ||
| 32 | /* Number of address bits */ | |
| 33 | uint8_t row_bits, col_bits, bank_bits; | |
| 34 | ||
| 35 | /* SDRAM timings in cycles */ | |
| 36 | uint8_t cas, twr, trc, trp, trcd, tras, txsr; | |
| d38da537 HS |
37 | |
| 38 | /* SDRAM refresh period in cycles */ | |
| 39 | unsigned long refresh_period; | |
| 7b64fef3 WD |
40 | }; |
| 41 | ||
| a23e277c HS |
42 | /* |
| 43 | * Attempt to initialize the SDRAM controller using the specified | |
| 44 | * parameters. Return the expected size of the memory area based on | |
| 45 | * the number of address and data bits. | |
| 46 | * | |
| 47 | * The caller should verify that the configuration is correct by | |
| 48 | * running a memory test, e.g. get_ram_size(). | |
| 49 | */ | |
| 50 | extern unsigned long sdram_init(void *sdram_base, | |
| 51 | const struct sdram_config *config); | |
| 7b64fef3 WD |
52 | |
| 53 | #endif /* __ASM_AVR32_SDRAM_H */ |