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/*
* Board specific setup info
*
* (C) Copyright 2005-2008 Samsung Electronics
* Kyungmin Park <kyungmin.park@samsung.com>
*
* Derived from board/omap2420h4/platform.S
*
* 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 <asm/arch/omap2420.h>
#include <asm/arch/mem.h>
#include <asm/arch/clocks.h>
#define APOLLON_CS0_BASE 0x00000000
#ifdef PRCM_CONFIG_I
#define SDRC_ACTIM_CTRLA_0_VAL 0x7BA35907
#define SDRC_ACTIM_CTRLB_0_VAL 0x00000013
#define SDRC_RFR_CTRL_0_VAL 0x00044C01
/* GPMC */
#define APOLLON_GPMC_CONFIG1_0 0xe30d1201
#define APOLLON_GPMC_CONFIG2_0 0x000c1000
#define APOLLON_GPMC_CONFIG3_0 0x00030400
#define APOLLON_GPMC_CONFIG4_0 0x0B841006
#define APOLLON_GPMC_CONFIG5_0 0x020F0C11
#define APOLLON_GPMC_CONFIG6_0 0x00000000
#define APOLLON_GPMC_CONFIG7_0 (0x00000e40 | (APOLLON_CS0_BASE >> 24))
#elif defined(PRCM_CONFIG_II)
#define SDRC_ACTIM_CTRLA_0_VAL 0x4A59B485
#define SDRC_ACTIM_CTRLB_0_VAL 0x0000000C
#define SDRC_RFR_CTRL_0_VAL 0x00030001
/* GPMC */
#define APOLLON_GPMC_CONFIG1_0 0xe30d1201
#define APOLLON_GPMC_CONFIG2_0 0x00080E81
#define APOLLON_GPMC_CONFIG3_0 0x00030400
#define APOLLON_GPMC_CONFIG4_0 0x08041586
#define APOLLON_GPMC_CONFIG5_0 0x020C090E
#define APOLLON_GPMC_CONFIG6_0 0x00000000
#define APOLLON_GPMC_CONFIG7_0 (0x00000e40 | (APOLLON_CS0_BASE >> 24))
#else
#error "Please configure PRCM schecm"
#endif
_TEXT_BASE:
.word TEXT_BASE /* sdram load addr from config.mk */
.globl lowlevel_init
lowlevel_init:
mov r3, r0 /* save skip information */
/* Disable watchdog */
ldr r0, =WD2_BASE
ldr r1, =WD_UNLOCK1
str r1, [r0, #WSPR]
ldr r1, =WD_UNLOCK2
str r1, [r0, #WSPR]
#ifdef DEBUG_LED
/* LED0 OFF */
ldr r0, =0x480000E5 /* ball AA10, mode 3 */
mov r1, #0x0b
strb r1, [r0]
#endif
/* Pin muxing for SDRC */
mov r1, #0x00
ldr r0, =0x480000A1 /* ball C12, mode 0 */
strb r1, [r0]
ldr r0, =0x48000032 /* ball D11, mode 0 */
strb r1, [r0]
ldr r0, =0x480000A3 /* ball B13, mode 0 */
strb r1, [r0]
/* SDRC setting */
ldr r0, =OMAP2420_SDRC_BASE
ldr r1, =0x00000010
str r1, [r0, #0x10]
ldr r1, =0x00000100
str r1, [r0, #0x44]
/* SDRC CS0 configuration */
#ifdef CONFIG_APOLLON_PLUS
ldr r1, =0x01702011
#else
ldr r1, =0x00d04011
#endif
str r1, [r0, #0x80]
ldr r1, =SDRC_ACTIM_CTRLA_0_VAL
str r1, [r0, #0x9C]
ldr r1, =SDRC_ACTIM_CTRLB_0_VAL
str r1, [r0, #0xA0]
ldr r1, =SDRC_RFR_CTRL_0_VAL
str r1, [r0, #0xA4]
ldr r1, =0x00000041
str r1, [r0, #0x70]
/* Manual command sequence */
ldr r1, =0x00000007
str r1, [r0, #0xA8]
ldr r1, =0x00000000
str r1, [r0, #0xA8]
ldr r1, =0x00000001
str r1, [r0, #0xA8]
ldr r1, =0x00000002
str r1, [r0, #0xA8]
str r1, [r0, #0xA8]
/*
* CS0 SDRC Mode register
* Burst length = 4 - DDR memory
* Serial mode
* CAS latency = 3
*/
ldr r1, =0x00000032
str r1, [r0, #0x84]
/* Note: You MUST set EMR values */
/* EMR1 & EMR2 */
ldr r1, =0x00000000
str r1, [r0, #0x88]
str r1, [r0, #0x8C]
#ifdef OLD_SDRC_DLLA_CTRL
/* SDRC_DLLA_CTRL */
ldr r1, =0x00007306
str r1, [r0, #0x60]
ldr r1, =0x00007303
str r1, [r0, #0x60]
#else
/* SDRC_DLLA_CTRL */
ldr r1, =0x00000506
str r1, [r0, #0x60]
ldr r1, =0x00000503
str r1, [r0, #0x60]
#endif
#ifdef __BROKEN_FEATURE__
/* SDRC_DLLB_CTRL */
ldr r1, =0x00000506
str r1, [r0, #0x68]
ldr r1, =0x00000503
str r1, [r0, #0x68]
#endif
/* little delay after init */
mov r2, #0x1800
1:
subs r2, r2, #0x1
bne 1b
ldr sp, SRAM_STACK
str ip, [sp] /* stash old link register */
mov ip, lr /* save link reg across call */
mov r0, r3 /* pass skip info to s_init */
bl s_init /* go setup pll,mux,memory */
ldr ip, [sp] /* restore save ip */
mov lr, ip /* restore link reg */
/* back to arch calling code */
mov pc, lr
/* the literal pools origin */
.ltorg
SRAM_STACK:
.word LOW_LEVEL_SRAM_STACK
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