[people/ms/u-boot.git] / board / samsung / smdk2400 / lowlevel_init.S

/*
 * Memory Setup stuff - taken from blob memsetup.S
 *
 * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) and
 *                     Jan-Derk Bakker (J.D.Bakker@its.tudelft.nl)
 *
 * Modified for the Samsung development board by
 * (C) Copyright 2002
 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
 *
 * 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
 */


#include <config.h>
#include <version.h>


/* some parameters for the board */

/*
 *
 * Taken from linux/arch/arm/boot/compressed/head-s3c2400.S
 *
 * Copyright (C) 2001 Samsung Electronics by chc, 010406
 *
 * S3C2400 specific tweaks.
 *
 */

/* memory controller */
#define BWSCON 0x14000000
#define BANKCON3 0x14000010	/* for cs8900, ethernet */

/* Bank0 */
#define B0_Tacs	0x0	/* 0 clk */
#define B0_Tcos	0x0	/* 0 clk */
#define B0_Tacc	0x7	/* 14 clk */
#define B0_Tcoh	0x0	/* 0 clk */
#define B0_Tah	0x0	/* 0 clk */
#define B0_Tacp	0x0
#define B0_PMC	0x0	/* normal */

/* Bank1 */
#define B1_Tacs	0x0	/* 0 clk */
#define B1_Tcos	0x0	/* 0 clk */
#define B1_Tacc	0x7	/* 14 clk */
#define B1_Tcoh	0x0	/* 0 clk */
#define B1_Tah	0x0	/* 0 clk */
#define B1_Tacp	0x0
#define B1_PMC	0x0	/* normal */

/* Bank2 */
#define B2_Tacs	0x0	/* 0 clk */
#define B2_Tcos	0x0	/* 0 clk */
#define B2_Tacc	0x7	/* 14 clk */
#define B2_Tcoh	0x0	/* 0 clk */
#define B2_Tah	0x0	/* 0 clk */
#define B2_Tacp	0x0
#define B2_PMC	0x0	/* normal */

/* Bank3 - setup for the cs8900 */
#define B3_Tacs	0x0	/* 0 clk */
#define B3_Tcos	0x3	/* 4 clk */
#define B3_Tacc	0x7	/* 14 clk */
#define B3_Tcoh	0x1	/* 1 clk */
#define B3_Tah	0x0	/* 0 clk */
#define B3_Tacp	0x3	/* 6 clk */
#define B3_PMC	0x0	/* normal */

/* Bank4 */
#define B4_Tacs	0x0	/* 0 clk */
#define B4_Tcos	0x0	/* 0 clk */
#define B4_Tacc	0x7	/* 14 clk */
#define B4_Tcoh	0x0	/* 0 clk */
#define B4_Tah	0x0	/* 0 clk */
#define B4_Tacp	0x0
#define B4_PMC	0x0	/* normal */

/* Bank5 */
#define B5_Tacs	0x0	/* 0 clk */
#define B5_Tcos	0x0	/* 0 clk */
#define B5_Tacc	0x7	/* 14 clk */
#define B5_Tcoh	0x0	/* 0 clk */
#define B5_Tah	0x0	/* 0 clk */
#define B5_Tacp	0x0
#define B5_PMC	0x0	/* normal */

/* Bank6 */
#define	B6_MT	0x3	/* SDRAM */
#define	B6_Trcd	0x1	/* 3clk */
#define	B6_SCAN	0x1	/* 9 bit */

/* Bank7 */
#define	B7_MT	0x3	/* SDRAM */
#define	B7_Trcd	0x1	/* 3clk */
#define	B7_SCAN	0x1	/* 9 bit */

/* refresh parameter */
#define REFEN	0x1	/* enable refresh */
#define TREFMD	0x0	/* CBR(CAS before RAS)/auto refresh */
#define Trp	0x0	/* 2 clk */
#define Trc	0x3	/* 7 clk */
#define Tchr	0x2	/* 3 clk */

#define REFCNT	1113	/* period=15.6 us, HCLK=60Mhz, (2048+1-15.6*66) */


_TEXT_BASE:
	.word	TEXT_BASE

.globl lowlevel_init
lowlevel_init:
	/* memory control configuration */
	/* make r0 relative the current location so that it */
	/* reads SMRDATA out of FLASH rather than memory ! */
	ldr     r0, =SMRDATA
	ldr	r1, _TEXT_BASE
	sub	r0, r0, r1
	ldr	r1, =BWSCON	/* Bus Width Status Controller */
	add     r2, r0, #52
0:
	ldr     r3, [r0], #4
	str     r3, [r1], #4
	cmp     r2, r0
	bne     0b

	/* everything is fine now */
	mov	pc, lr

	.ltorg
/* the literal pools origin */

SMRDATA:
	.word	0x2211d114	/* d->Ethernet, BUSWIDTH=32 */
	.word	((B0_Tacs<<13)+(B0_Tcos<<11)+(B0_Tacc<<8)+(B0_Tcoh<<6)+(B0_Tah<<4)+(B0_Tacp<<2)+(B0_PMC)) /* GCS0 */
	.word	((B1_Tacs<<13)+(B1_Tcos<<11)+(B1_Tacc<<8)+(B1_Tcoh<<6)+(B1_Tah<<4)+(B1_Tacp<<2)+(B1_PMC)) /* GCS1 */
	.word	((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC)) /* GCS2 */
	.word	((B3_Tacs<<13)+(B3_Tcos<<11)+(B3_Tacc<<8)+(B3_Tcoh<<6)+(B3_Tah<<4)+(B3_Tacp<<2)+(B3_PMC)) /* GCS3 */
	.word	((B4_Tacs<<13)+(B4_Tcos<<11)+(B4_Tacc<<8)+(B4_Tcoh<<6)+(B4_Tah<<4)+(B4_Tacp<<2)+(B4_PMC)) /* GCS4 */
	.word	((B5_Tacs<<13)+(B5_Tcos<<11)+(B5_Tacc<<8)+(B5_Tcoh<<6)+(B5_Tah<<4)+(B5_Tacp<<2)+(B5_PMC)) /* GCS5 */
	.word	((B6_MT<<15)+(B6_Trcd<<2)+(B6_SCAN)) /* GCS6 */
	.word	((B7_MT<<15)+(B7_Trcd<<2)+(B7_SCAN)) /* GCS7 */
	.word	((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT)
	.word	0x10	/* BUSWIDTH=32, SCLK power saving mode, BANKSIZE 32M/32M */
	.word	0x30	/* MRSR6, CL=3clk */
	.word	0x30	/* MRSR7 */
Commit	Line	Data
fe8c2806 WD	1	/*
	2	* Memory Setup stuff - taken from blob memsetup.S
	3	*
	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)
	6	*
	7	* Modified for the Samsung development board by
	8	* (C) Copyright 2002
792a09eb	9	* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
fe8c2806 WD	10	*
	11	* See file CREDITS for list of people who contributed to this
	12	* project.
	13	*
	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.
	18	*
	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.
	23	*
	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,
	27	* MA 02111-1307 USA
	28	*/
	29
	30
fe8c2806 WD	31	#include <config.h>
	32	#include <version.h>
	33
	34
	35	/* some parameters for the board */
	36
	37	/*
	38	*
	39	* Taken from linux/arch/arm/boot/compressed/head-s3c2400.S
	40	*
	41	* Copyright (C) 2001 Samsung Electronics by chc, 010406
	42	*
	43	* S3C2400 specific tweaks.
	44	*
	45	*/
	46
	47	/* memory controller */
	48	#define BWSCON 0x14000000
	49	#define BANKCON3 0x14000010 /* for cs8900, ethernet */
	50
	51	/* Bank0 */
	52	#define B0_Tacs 0x0 /* 0 clk */
	53	#define B0_Tcos 0x0 /* 0 clk */
	54	#define B0_Tacc 0x7 /* 14 clk */
	55	#define B0_Tcoh 0x0 /* 0 clk */
	56	#define B0_Tah 0x0 /* 0 clk */
	57	#define B0_Tacp 0x0
	58	#define B0_PMC 0x0 /* normal */
	59
	60	/* Bank1 */
	61	#define B1_Tacs 0x0 /* 0 clk */
	62	#define B1_Tcos 0x0 /* 0 clk */
	63	#define B1_Tacc 0x7 /* 14 clk */
	64	#define B1_Tcoh 0x0 /* 0 clk */
	65	#define B1_Tah 0x0 /* 0 clk */
	66	#define B1_Tacp 0x0
	67	#define B1_PMC 0x0 /* normal */
	68
	69	/* Bank2 */
	70	#define B2_Tacs 0x0 /* 0 clk */
	71	#define B2_Tcos 0x0 /* 0 clk */
	72	#define B2_Tacc 0x7 /* 14 clk */
	73	#define B2_Tcoh 0x0 /* 0 clk */
	74	#define B2_Tah 0x0 /* 0 clk */
	75	#define B2_Tacp 0x0
	76	#define B2_PMC 0x0 /* normal */
	77
	78	/* Bank3 - setup for the cs8900 */
	79	#define B3_Tacs 0x0 /* 0 clk */
	80	#define B3_Tcos 0x3 /* 4 clk */
	81	#define B3_Tacc 0x7 /* 14 clk */
	82	#define B3_Tcoh 0x1 /* 1 clk */
	83	#define B3_Tah 0x0 /* 0 clk */
	84	#define B3_Tacp 0x3 /* 6 clk */
	85	#define B3_PMC 0x0 /* normal */
	86
	87	/* Bank4 */
	88	#define B4_Tacs 0x0 /* 0 clk */
	89	#define B4_Tcos 0x0 /* 0 clk */
	90	#define B4_Tacc 0x7 /* 14 clk */
	91	#define B4_Tcoh 0x0 /* 0 clk */
	92	#define B4_Tah 0x0 /* 0 clk */
	93	#define B4_Tacp 0x0
	94	#define B4_PMC 0x0 /* normal */
95
96	/* Bank5 */
97	#define B5_Tacs 0x0 /* 0 clk */
98	#define B5_Tcos 0x0 /* 0 clk */
99	#define B5_Tacc 0x7 /* 14 clk */
100	#define B5_Tcoh 0x0 /* 0 clk */
101	#define B5_Tah 0x0 /* 0 clk */
102	#define B5_Tacp 0x0
103	#define B5_PMC 0x0 /* normal */
104
105	/* Bank6 */
106	#define B6_MT 0x3 /* SDRAM */
107	#define B6_Trcd 0x1 /* 3clk */
108	#define B6_SCAN 0x1 /* 9 bit */
109
110	/* Bank7 */
111	#define B7_MT 0x3 /* SDRAM */
112	#define B7_Trcd 0x1 /* 3clk */
113	#define B7_SCAN 0x1 /* 9 bit */
114
115	/* refresh parameter */
116	#define REFEN 0x1 /* enable refresh */
117	#define TREFMD 0x0 /* CBR(CAS before RAS)/auto refresh */
118	#define Trp 0x0 /* 2 clk */
119	#define Trc 0x3 /* 7 clk */
1636d1c8	120	#define Tchr 0x2 /* 3 clk */
fe8c2806 WD	121
	122	#define REFCNT 1113 /* period=15.6 us, HCLK=60Mhz, (2048+1-15.666) /
	123
	124
	125	_TEXT_BASE:
	126	.word TEXT_BASE
	127
400558b5 WD	128	.globl lowlevel_init
400558b5 WD	129	lowlevel_init:
fe8c2806 WD	130	/* memory control configuration */
	131	/* make r0 relative the current location so that it */
	132	/* reads SMRDATA out of FLASH rather than memory ! */
	133	ldr r0, =SMRDATA
	134	ldr r1, _TEXT_BASE
	135	sub r0, r0, r1
	136	ldr r1, =BWSCON /* Bus Width Status Controller */
	137	add r2, r0, #52
	138	0:
	139	ldr r3, [r0], #4
	140	str r3, [r1], #4
	141	cmp r2, r0
	142	bne 0b
	143
	144	/* everything is fine now */
	145	mov pc, lr
	146
	147	.ltorg
	148	/* the literal pools origin */
	149
	150	SMRDATA:
	151	.word 0x2211d114 /* d->Ethernet, BUSWIDTH=32 */
	152	.word ((B0_Tacs<<13)+(B0_Tcos<<11)+(B0_Tacc<<8)+(B0_Tcoh<<6)+(B0_Tah<<4)+(B0_Tacp<<2)+(B0_PMC)) /* GCS0 */
	153	.word ((B1_Tacs<<13)+(B1_Tcos<<11)+(B1_Tacc<<8)+(B1_Tcoh<<6)+(B1_Tah<<4)+(B1_Tacp<<2)+(B1_PMC)) /* GCS1 */
	154	.word ((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC)) /* GCS2 */
	155	.word ((B3_Tacs<<13)+(B3_Tcos<<11)+(B3_Tacc<<8)+(B3_Tcoh<<6)+(B3_Tah<<4)+(B3_Tacp<<2)+(B3_PMC)) /* GCS3 */
	156	.word ((B4_Tacs<<13)+(B4_Tcos<<11)+(B4_Tacc<<8)+(B4_Tcoh<<6)+(B4_Tah<<4)+(B4_Tacp<<2)+(B4_PMC)) /* GCS4 */
	157	.word ((B5_Tacs<<13)+(B5_Tcos<<11)+(B5_Tacc<<8)+(B5_Tcoh<<6)+(B5_Tah<<4)+(B5_Tacp<<2)+(B5_PMC)) /* GCS5 */
	158	.word ((B6_MT<<15)+(B6_Trcd<<2)+(B6_SCAN)) /* GCS6 */
	159	.word ((B7_MT<<15)+(B7_Trcd<<2)+(B7_SCAN)) /* GCS7 */
	160	.word ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT)
	161	.word 0x10 /* BUSWIDTH=32, SCLK power saving mode, BANKSIZE 32M/32M */
	162	.word 0x30 /* MRSR6, CL=3clk */
	163	.word 0x30 /* MRSR7 */