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rename CFG_ macros to CONFIG_SYS
[people/ms/u-boot.git] / cpu / ppc4xx / sdram.h
1 /*
2 * (C) Copyright 2006
3 * Stefan Roese, DENX Software Engineering, sr@denx.de.
4 *
5 * (C) Copyright 2006
6 * DAVE Srl <www.dave-tech.it>
7 *
8 * See file CREDITS for list of people who contributed to this
9 * project.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 * MA 02111-1307 USA
25 */
26
27 #ifndef _SDRAM_H_
28 #define _SDRAM_H_
29
30 #include <config.h>
31
32 #define ONE_BILLION 1000000000
33
34 struct sdram_conf_s {
35 unsigned long size;
36 int rows;
37 unsigned long reg;
38 };
39
40 typedef struct sdram_conf_s sdram_conf_t;
41
42 /* Bitfields offsets */
43 #define SDRAM0_TR_CASL (31 - 8)
44 #define SDRAM0_TR_PTA (31 - 13)
45 #define SDRAM0_TR_CTP (31 - 15)
46 #define SDRAM0_TR_LDF (31 - 17)
47 #define SDRAM0_TR_RFTA (31 - 29)
48 #define SDRAM0_TR_RCD (31 - 31)
49
50 #ifdef CONFIG_SYS_SDRAM_CL
51 /* SDRAM timings [ns] according to AMCC/IBM names (see SDRAM_faq.doc) */
52 #define CONFIG_SYS_SDRAM_CASL CONFIG_SYS_SDRAM_CL
53 #define CONFIG_SYS_SDRAM_PTA CONFIG_SYS_SDRAM_tRP
54 #define CONFIG_SYS_SDRAM_CTP (CONFIG_SYS_SDRAM_tRC - CONFIG_SYS_SDRAM_tRCD - CONFIG_SYS_SDRAM_tRP)
55 #define CONFIG_SYS_SDRAM_LDF 0
56 #ifdef CONFIG_SYS_SDRAM_tRFC
57 #define CONFIG_SYS_SDRAM_RFTA CONFIG_SYS_SDRAM_tRFC
58 #else
59 #define CONFIG_SYS_SDRAM_RFTA CONFIG_SYS_SDRAM_tRC
60 #endif
61 #define CONFIG_SYS_SDRAM_RCD CONFIG_SYS_SDRAM_tRCD
62 #endif /* #ifdef CONFIG_SYS_SDRAM_CL */
63
64 /*
65 * Some defines for the 440 DDR controller
66 */
67 #define SDRAM_CFG0_DC_EN 0x80000000 /* SDRAM Controller Enable */
68 #define SDRAM_CFG0_MEMCHK 0x30000000 /* Memory data error checking mask*/
69 #define SDRAM_CFG0_MEMCHK_NON 0x00000000 /* No ECC generation */
70 #define SDRAM_CFG0_MEMCHK_GEN 0x20000000 /* ECC generation */
71 #define SDRAM_CFG0_MEMCHK_CHK 0x30000000 /* ECC generation and checking */
72 #define SDRAM_CFG0_DRAMWDTH 0x02000000 /* DRAM width mask */
73 #define SDRAM_CFG0_DRAMWDTH_32 0x00000000 /* 32 bits */
74 #define SDRAM_CFG0_DRAMWDTH_64 0x02000000 /* 64 bits */
75
76 #endif