mirror of
https://github.com/AsahiLinux/u-boot
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337 lines
5.9 KiB
ArmAsm
337 lines
5.9 KiB
ArmAsm
/*
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* Board specific setup info
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*
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* (C) Copyright 2005-2007
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* Samsung Electronics,
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* Kyungmin Park <kyungmin.park@samsung.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <config.h>
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#include <version.h>
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#include <asm/arch/omap2420.h>
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#include <asm/arch/mem.h>
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#include <asm/arch/clocks.h>
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#include "mem.h"
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#define APOLLON_CS0_BASE 0x00000000
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#ifdef PRCM_CONFIG_I
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#define SDRC_ACTIM_CTRLA_0_VAL 0x7BA35907
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#define SDRC_ACTIM_CTRLB_0_VAL 0x00000013
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#define SDRC_RFR_CTRL_0_VAL 0x00044C01
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#elif defined(PRCM_CONFIG_II)
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#define SDRC_ACTIM_CTRLA_0_VAL 0x4A59B485
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#define SDRC_ACTIM_CTRLB_0_VAL 0x0000000C
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#define SDRC_RFR_CTRL_0_VAL 0x00030001
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#endif
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#define SDRAM_BASE_ADDRESS 0x80008000
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_TEXT_BASE:
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.word TEXT_BASE /* sdram load addr from config.mk */
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.globl lowlevel_init
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lowlevel_init:
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#ifdef CONFIG_SYS_NOR_BOOT
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/* Check running in SDRAM */
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mov r0, pc, lsr #28
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cmp r0, #8
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beq prcm_setup
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flash_setup:
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/* In Flash */
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ldr r0, =WD2_BASE
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ldr r1, =WD_UNLOCK1
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str r1, [r0, #WSPR]
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ldr r1, =WD_UNLOCK2
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str r1, [r0, #WSPR]
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/* Pin muxing for SDRC */
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mov r1, #0x00
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ldr r0, =0x480000A1 /* ball C12, mode 0 */
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strb r1, [r0]
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ldr r0, =0x48000032 /* ball D11, mode 0 */
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strb r1, [r0]
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ldr r0, =0x480000A3 /* ball B13, mode 0 */
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strb r1, [r0]
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/* SDRC setting */
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ldr r0, =OMAP2420_SDRC_BASE
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ldr r1, =0x00000010
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str r1, [r0, #0x10]
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ldr r1, =0x00000100
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str r1, [r0, #0x44]
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/* SDRC CS0 configuration */
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ldr r1, =0x00d04011
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str r1, [r0, #0x80]
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ldr r1, =SDRC_ACTIM_CTRLA_0_VAL
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str r1, [r0, #0x9C]
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ldr r1, =SDRC_ACTIM_CTRLB_0_VAL
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str r1, [r0, #0xA0]
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ldr r1, =SDRC_RFR_CTRL_0_VAL
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str r1, [r0, #0xA4]
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ldr r1, =0x00000041
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str r1, [r0, #0x70]
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/* Manual command sequence */
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ldr r1, =0x00000007
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str r1, [r0, #0xA8]
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ldr r1, =0x00000000
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str r1, [r0, #0xA8]
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ldr r1, =0x00000001
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str r1, [r0, #0xA8]
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ldr r1, =0x00000002
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str r1, [r0, #0xA8]
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str r1, [r0, #0xA8]
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/*
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* CS0 SDRC Mode register
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* Burst length = 4 - DDR memory
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* Serial mode
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* CAS latency = 3
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*/
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ldr r1, =0x00000032
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str r1, [r0, #0x84]
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/* Note: You MUST set EMR values */
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/* EMR1 & EMR2 */
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ldr r1, =0x00000000
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str r1, [r0, #0x88]
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str r1, [r0, #0x8C]
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#ifdef OLD_SDRC_DLLA_CTRL
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/* SDRC_DLLA_CTRL */
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ldr r1, =0x00007306
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str r1, [r0, #0x60]
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ldr r1, =0x00007303
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str r1, [r0, #0x60]
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#else
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/* SDRC_DLLA_CTRL */
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ldr r1, =0x00000506
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str r1, [r0, #0x60]
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ldr r1, =0x00000503
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str r1, [r0, #0x60]
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#endif
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#ifdef __BROKEN_FEATURE__
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/* SDRC_DLLB_CTRL */
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ldr r1, =0x00000506
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str r1, [r0, #0x68]
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ldr r1, =0x00000503
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str r1, [r0, #0x68]
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#endif
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/* little delay after init */
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mov r2, #0x1800
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1:
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subs r2, r2, #0x1
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bne 1b
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/* Setup base address */
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ldr r0, =0x00000000 /* NOR address */
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ldr r1, =SDRAM_BASE_ADDRESS /* SDRAM address */
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ldr r2, =0x20000 /* Size: 128KB */
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copy_loop:
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ldmia r0!, {r3-r10}
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stmia r1!, {r3-r10}
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cmp r0, r2
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ble copy_loop
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ldr r1, =SDRAM_BASE_ADDRESS
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mov lr, pc
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mov pc, r1
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#endif
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prcm_setup:
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ldr r0, =OMAP2420_CM_BASE
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ldr r1, [r0, #0x544] /* CLKSEL2_PLL */
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bic r1, r1, #0x03
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orr r1, r1, #0x02
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str r1, [r0, #0x544]
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ldr r1, [r0, #0x500]
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bic r1, r1, #0x03
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orr r1, r1, #0x01
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str r1, [r0, #0x500]
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ldr r1, [r0, #0x140]
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bic r1, r1, #0x1f
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orr r1, r1, #0x02
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str r1, [r0, #0x140]
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#ifdef PRCM_CONFIG_I
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ldr r1, =0x000003C3
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#else
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ldr r1, =0x00000343
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#endif
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str r1, [r0, #0x840]
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ldr r1, =0x00000002
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str r1, [r0, #0x340]
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ldr r1, =CM_CLKSEL1_CORE
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#ifdef PRCM_CONFIG_I
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ldr r2, =0x08300C44
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#else
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ldr r2, =0x04600C26
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#endif
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str r2, [r1]
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ldr r0, =OMAP2420_CM_BASE
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ldr r1, [r0, #0x084]
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and r1, r1, #0x01
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cmp r1, #0x01
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bne clkvalid
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b .
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clkvalid:
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mov r1, #0x01
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str r1, [r0, #0x080]
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waitvalid:
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ldr r1, [r0, #0x084]
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and r1, r1, #0x01
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cmp r1, #0x00
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bne waitvalid
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ldr r0, =CM_CLKSEL1_PLL
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#ifdef PRCM_CONFIG_I
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ldr r1, =0x01837100
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#else
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ldr r1, =0x01832100
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#endif
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str r1, [r0]
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ldr r0, =PRCM_CLKCFG_CTRL
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mov r1, #0x01
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str r1, [r0]
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mov r6, #0x50
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loop1:
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subs r6, r6, #0x01
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cmp r6, #0x01
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bne loop1
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ldr r0, =CM_CLKEN_PLL
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mov r1, #0x0f
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str r1, [r0]
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mov r6, #0x100
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loop2:
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subs r6, r6, #0x01
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cmp r6, #0x01
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bne loop2
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ldr r0, =0x48008200
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ldr r1, =0xbfffffff
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str r1, [r0]
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ldr r0, =0x48008210
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ldr r1, =0xfffffff9
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str r1, [r0]
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ldr r0, =0x4806a004
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ldr r1, =0x00
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strb r1, [r0]
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ldr r0, =0x4806a020
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ldr r1, =0x07
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strb r1, [r0]
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ldr r0, =0x4806a00c
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ldr r1, =0x83
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strb r1, [r0]
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ldr r0, =0x4806a000
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ldr r1, =0x1a
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strb r1, [r0]
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ldr r0, =0x4806a004
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ldr r1, =0x00
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strb r1, [r0]
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ldr r0, =0x4806a00c
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ldr r1, =0x03
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strb r1, [r0]
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ldr r0, =0x4806a010
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ldr r1, =0x03
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strb r1, [r0]
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ldr r0, =0x4806a008
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ldr r1, =0x04
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strb r1, [r0]
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ldr r0, =0x4806a020
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ldr r1, =0x00
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strb r1, [r0]
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#if 0
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ldr r0, =0x4806a000
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mov r1, #'u'
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strb r1, [r0]
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#endif
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#if 0
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/* LED0 OFF */
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ldr r3, =0x480000E5
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mov r4, #0x0b
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strb r4, [r3]
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#endif
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ldr sp, SRAM_STACK
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str ip, [sp] /* stash old link register */
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mov ip, lr /* save link reg across call */
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bl s_init /* go setup pll,mux,memory */
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ldr ip, [sp] /* restore save ip */
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mov lr, ip /* restore link reg */
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/* map interrupt controller */
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ldr r0, VAL_INTH_SETUP
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mcr p15, 0, r0, c15, c2, 4
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/* back to arch calling code */
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mov pc, lr
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/* the literal pools origin */
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.ltorg
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VAL_INTH_SETUP:
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.word PERIFERAL_PORT_BASE
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SRAM_STACK:
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.word LOW_LEVEL_SRAM_STACK
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