2 * Memory Setup stuff - taken from blob memsetup.S
4 * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) and
5 * Jan-Derk Bakker (J.D.Bakker@its.tudelft.nl)
7 * Modified for the TRAB board by
8 * (C) Copyright 2002-2003
9 * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
35 /* some parameters for the board */
39 * Copied from linux/arch/arm/boot/compressed/head-s3c2400.S
41 * Copyright (C) 2001 Samsung Electronics by chc, 010406
43 * TRAB specific tweaks.
47 /* memory controller */
48 #define BWSCON 0x14000000
51 #define B0_Tacs 0x1 /* 1 clk */
52 #define B0_Tcos 0x1 /* 1 clk */
53 #define B0_Tacc 0x5 /* 8 clk */
54 #define B0_Tcoh 0x1 /* 1 clk */
55 #define B0_Tah 0x1 /* 1 clk */
57 #define B0_PMC 0x0 /* normal */
60 #define B1_Tacs 0x1 /* 1 clk */
61 #define B1_Tcos 0x1 /* 1 clk */
62 #define B1_Tacc 0x5 /* 8 clk */
63 #define B1_Tcoh 0x1 /* 1 clk */
64 #define B1_Tah 0x1 /* 1 clk */
66 #define B1_PMC 0x0 /* normal */
69 #define B2_Tacs 0x1 /* 1 clk */
70 #define B2_Tcos 0x1 /* 1 clk */
71 #define B2_Tacc 0x5 /* 8 clk */
72 #define B2_Tcoh 0x1 /* 1 clk */
73 #define B2_Tah 0x1 /* 1 clk */
75 #define B2_PMC 0x0 /* normal */
77 /* Bank3 - setup for the cs8900 */
78 #define B3_Tacs 0x3 /* 4 clk */
79 #define B3_Tcos 0x3 /* 4 clk */
80 #define B3_Tacc 0x7 /* 14 clk */
81 #define B3_Tcoh 0x1 /* 1 clk */
82 #define B3_Tah 0x0 /* 0 clk */
83 #define B3_Tacp 0x3 /* 6 clk */
84 #define B3_PMC 0x0 /* normal */
87 #define B4_Tacs 0x0 /* 0 clk */
88 #define B4_Tcos 0x0 /* 0 clk */
89 #define B4_Tacc 0x7 /* 14 clk */
90 #define B4_Tcoh 0x0 /* 0 clk */
91 #define B4_Tah 0x0 /* 0 clk */
93 #define B4_PMC 0x0 /* normal */
96 #define B5_Tacs 0x0 /* 0 clk */
97 #define B5_Tcos 0x0 /* 0 clk */
98 #define B5_Tacc 0x7 /* 14 clk */
99 #define B5_Tcoh 0x0 /* 0 clk */
100 #define B5_Tah 0x0 /* 0 clk */
102 #define B5_PMC 0x0 /* normal */
104 #ifndef CONFIG_RAM_16MB /* 32 MB RAM */
106 #define B6_MT 0x3 /* SDRAM */
107 #define B6_Trcd 0x0 /* 2clk */
108 #define B6_SCAN 0x1 /* 9 bit */
111 #define B7_MT 0x3 /* SDRAM */
112 #define B7_Trcd 0x0 /* 2clk */
113 #define B7_SCAN 0x1 /* 9 bit */
114 #else /* CONFIG_RAM_16MB = 16 MB RAM */
116 #define B6_MT 0x3 /* SDRAM */
117 #define B6_Trcd 0x1 /* 2clk */
118 #define B6_SCAN 0x0 /* 8 bit */
121 #define B7_MT 0x3 /* SDRAM */
122 #define B7_Trcd 0x1 /* 2clk */
123 #define B7_SCAN 0x0 /* 8 bit */
124 #endif /* CONFIG_RAM_16MB */
126 /* refresh parameter */
127 #define REFEN 0x1 /* enable refresh */
128 #define TREFMD 0x0 /* CBR(CAS before RAS)/auto refresh */
129 #define Trp 0x0 /* 2 clk */
130 #define Trc 0x3 /* 7 clk */
131 #define Tchr 0x2 /* 3 clk */
133 #ifdef CONFIG_TRAB_50MHZ
134 #define REFCNT 1269 /* period=15.6 us, HCLK=50Mhz, (2048+1-15.6*50) */
136 #define REFCNT 1011 /* period=15.6 us, HCLK=66.5Mhz, (2048+1-15.6*66.5) */
145 /* memory control configuration */
146 /* make r0 relative the current location so that it */
147 /* reads SMRDATA out of FLASH rather than memory ! */
151 ldr r1, =BWSCON /* Bus Width Status Controller */
159 /* everything is fine now */
163 /* the literal pools origin */
166 .word 0x2211d644 /* d->Ethernet, 6->CPLD, 4->SRAM, 4->FLASH */
167 .word ((B0_Tacs<<13)+(B0_Tcos<<11)+(B0_Tacc<<8)+(B0_Tcoh<<6)+(B0_Tah<<4)+(B0_Tacp<<2)+(B0_PMC)) /* GCS0 */
168 .word ((B1_Tacs<<13)+(B1_Tcos<<11)+(B1_Tacc<<8)+(B1_Tcoh<<6)+(B1_Tah<<4)+(B1_Tacp<<2)+(B1_PMC)) /* GCS1 */
169 .word ((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC)) /* GCS2 */
170 .word ((B3_Tacs<<13)+(B3_Tcos<<11)+(B3_Tacc<<8)+(B3_Tcoh<<6)+(B3_Tah<<4)+(B3_Tacp<<2)+(B3_PMC)) /* GCS3 */
171 .word ((B4_Tacs<<13)+(B4_Tcos<<11)+(B4_Tacc<<8)+(B4_Tcoh<<6)+(B4_Tah<<4)+(B4_Tacp<<2)+(B4_PMC)) /* GCS4 */
172 .word ((B5_Tacs<<13)+(B5_Tcos<<11)+(B5_Tacc<<8)+(B5_Tcoh<<6)+(B5_Tah<<4)+(B5_Tacp<<2)+(B5_PMC)) /* GCS5 */
173 .word ((B6_MT<<15)+(B6_Trcd<<2)+(B6_SCAN)) /* GCS6 */
174 .word ((B7_MT<<15)+(B7_Trcd<<2)+(B7_SCAN)) /* GCS7 */
175 .word ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT)
176 #ifndef CONFIG_RAM_16MB /* 32 MB RAM */
177 .word 0x10 /* BUSWIDTH=32, SCLK power saving mode, BANKSIZE 32M/32M */
178 #else /* CONFIG_RAM_16MB = 16 MB RAM */
179 .word 0x17 /* BUSWIDTH=32, SCLK power saving mode, BANKSIZE 16M/16M */
180 #endif /* CONFIG_RAM_16MB */
181 .word 0x20 /* MRSR6, CL=2clk */
182 .word 0x20 /* MRSR7 */