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u-boot/arch/arm/cpu/arm926ejs/davinci/lowlevel_init.S
Christian Riesch eb93524224 arm, davinci: Add lowlevel_init for SoCs other than DM644X 
The low level initialization code in
arch/arm/cpu/arm926ejs/davinci/lowlevel_init.S was written for
DM644X SoCs only. This patch makes the lowlevel_init function in this
file a dummy function for SoCs other than DM644X.

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Cc: Tom Rini <trini@ti.com>
Cc: Sergey Kubushyn <ksi@koi8.net>
Acked-by: Heiko Schocher <hs@denx.de>
Tested-by: Heiko Schocher <hs@denx.de>
2012-02-12 10:11:32 +01:00

713 lines
14 KiB
ArmAsm
Raw Blame History

/*
* Low-level board setup code for TI DaVinci SoC based boards.
*
* Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
*
* Partially based on TI sources, original copyrights follow:
*/
/*
* Board specific setup info
*
* (C) Copyright 2003
* Texas Instruments, <www.ti.com>
* Kshitij Gupta <Kshitij@ti.com>
*
* Modified for OMAP 1610 H2 board by Nishant Kamat, Jan 2004
*
* Modified for OMAP 5912 OSK board by Rishi Bhattacharya, Apr 2004
* See file CREDITS for list of people who contributed to this
* project.
*
* Modified for DV-EVM board by Rishi Bhattacharya, Apr 2005
* See file CREDITS for list of people who contributed to this
* project.
*
* Modified for DV-EVM board by Swaminathan S, Nov 2005
* 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>
#define MDSTAT_STATE 0x3f
.globl lowlevel_init
lowlevel_init:
#ifdef CONFIG_SOC_DM644X
/*-------------------------------------------------------*
* Mask all IRQs by setting all bits in the EINT default *
*-------------------------------------------------------*/
mov r1, $0
ldr r0, =EINT_ENABLE0
str r1, [r0]
ldr r0, =EINT_ENABLE1
str r1, [r0]
/*------------------------------------------------------*
* Put the GEM in reset *
*------------------------------------------------------*/
/* Put the GEM in reset */
ldr r8, PSC_GEM_FLAG_CLEAR
ldr r6, MDCTL_GEM
ldr r7, [r6]
and r7, r7, r8
str r7, [r6]
/* Enable the Power Domain Transition Command */
ldr r6, PTCMD
ldr r7, [r6]
orr r7, r7, $0x02
str r7, [r6]
/* Check for Transition Complete(PTSTAT) */
checkStatClkStopGem:
ldr r6, PTSTAT
ldr r7, [r6]
ands r7, r7, $0x02
bne checkStatClkStopGem
/* Check for GEM Reset Completion */
checkGemStatClkStop:
ldr r6, MDSTAT_GEM
ldr r7, [r6]
ands r7, r7, $0x100
bne checkGemStatClkStop
/* Do this for enabling a WDT initiated reset this is a workaround
for a chip bug. Not required under normal situations */
ldr r6, P1394
mov r10, $0
str r10, [r6]
/*------------------------------------------------------*
* Enable L1 & L2 Memories in Fast mode *
*------------------------------------------------------*/
ldr r6, DFT_ENABLE
mov r10, $0x01
str r10, [r6]
ldr r6, MMARG_BRF0
ldr r10, MMARG_BRF0_VAL
str r10, [r6]
ldr r6, DFT_ENABLE
mov r10, $0
str r10, [r6]
/*------------------------------------------------------*
* DDR2 PLL Initialization *
*------------------------------------------------------*/
/* Select the Clock Mode Depending on the Value written in the Boot Table by the run script */
mov r10, $0
ldr r6, PLL2_CTL
ldr r7, PLL_CLKSRC_MASK
ldr r8, [r6]
and r8, r8, r7
mov r9, r10, lsl $8
orr r8, r8, r9
str r8, [r6]
/* Select the PLLEN source */
ldr r7, PLL_ENSRC_MASK
and r8, r8, r7
str r8, [r6]
/* Bypass the PLL */
ldr r7, PLL_BYPASS_MASK
and r8, r8, r7
str r8, [r6]
/* Wait for few cycles to allow PLLEN Mux switch properly to bypass Clock */
mov r10, $0x20
WaitPPL2Loop:
subs r10, r10, $1
bne WaitPPL2Loop
/* Reset the PLL */
ldr r7, PLL_RESET_MASK
and r8, r8, r7
str r8, [r6]
/* Power up the PLL */
ldr r7, PLL_PWRUP_MASK
and r8, r8, r7
str r8, [r6]
/* Enable the PLL from Disable Mode */
ldr r7, PLL_DISABLE_ENABLE_MASK
and r8, r8, r7
str r8, [r6]
/* Program the PLL Multiplier */
ldr r6, PLL2_PLLM
mov r2, $0x17 /* 162 MHz */
str r2, [r6]
/* Program the PLL2 Divisor Value */
ldr r6, PLL2_DIV2
mov r3, $0x01
str r3, [r6]
/* Program the PLL2 Divisor Value */
ldr r6, PLL2_DIV1
mov r4, $0x0b /* 54 MHz */
str r4, [r6]
/* PLL2 DIV2 MMR */
ldr r8, PLL2_DIV_MASK
ldr r6, PLL2_DIV2
ldr r9, [r6]
and r8, r8, r9
mov r9, $0x01
mov r9, r9, lsl $15
orr r8, r8, r9
str r8, [r6]
/* Program the GOSET bit to take new divider values */
ldr r6, PLL2_PLLCMD
ldr r7, [r6]
orr r7, r7, $0x01
str r7, [r6]
/* Wait for Done */
ldr r6, PLL2_PLLSTAT
doneLoop_0:
ldr r7, [r6]
ands r7, r7, $0x01
bne doneLoop_0
/* PLL2 DIV1 MMR */
ldr r8, PLL2_DIV_MASK
ldr r6, PLL2_DIV1
ldr r9, [r6]
and r8, r8, r9
mov r9, $0x01
mov r9, r9, lsl $15
orr r8, r8, r9
str r8, [r6]
/* Program the GOSET bit to take new divider values */
ldr r6, PLL2_PLLCMD
ldr r7, [r6]
orr r7, r7, $0x01
str r7, [r6]
/* Wait for Done */
ldr r6, PLL2_PLLSTAT
doneLoop:
ldr r7, [r6]
ands r7, r7, $0x01
bne doneLoop
/* Wait for PLL to Reset Properly */
mov r10, $0x218
ResetPPL2Loop:
subs r10, r10, $1
bne ResetPPL2Loop
/* Bring PLL out of Reset */
ldr r6, PLL2_CTL
ldr r8, [r6]
orr r8, r8, $0x08
str r8, [r6]
/* Wait for PLL to Lock */
ldr r10, PLL_LOCK_COUNT
PLL2Lock:
subs r10, r10, $1
bne PLL2Lock
/* Enable the PLL */
ldr r6, PLL2_CTL
ldr r8, [r6]
orr r8, r8, $0x01
str r8, [r6]
/*------------------------------------------------------*
* Issue Soft Reset to DDR Module *
*------------------------------------------------------*/
/* Shut down the DDR2 LPSC Module */
ldr r8, PSC_FLAG_CLEAR
ldr r6, MDCTL_DDR2
ldr r7, [r6]
and r7, r7, r8
orr r7, r7, $0x03
str r7, [r6]
/* Enable the Power Domain Transition Command */
ldr r6, PTCMD
ldr r7, [r6]
orr r7, r7, $0x01
str r7, [r6]
/* Check for Transition Complete(PTSTAT) */
checkStatClkStop:
ldr r6, PTSTAT
ldr r7, [r6]
ands r7, r7, $0x01
bne checkStatClkStop
/* Check for DDR2 Controller Enable Completion */
checkDDRStatClkStop:
ldr r6, MDSTAT_DDR2
ldr r7, [r6]
and r7, r7, $MDSTAT_STATE
cmp r7, $0x03
bne checkDDRStatClkStop
/*------------------------------------------------------*
* Program DDR2 MMRs for 162MHz Setting *
*------------------------------------------------------*/
/* Program PHY Control Register */
ldr r6, DDRCTL
ldr r7, DDRCTL_VAL
str r7, [r6]
/* Program SDRAM Bank Config Register */
ldr r6, SDCFG
ldr r7, SDCFG_VAL
str r7, [r6]
/* Program SDRAM TIM-0 Config Register */
ldr r6, SDTIM0
ldr r7, SDTIM0_VAL_162MHz
str r7, [r6]
/* Program SDRAM TIM-1 Config Register */
ldr r6, SDTIM1
ldr r7, SDTIM1_VAL_162MHz
str r7, [r6]
/* Program the SDRAM Bank Config Control Register */
ldr r10, MASK_VAL
ldr r8, SDCFG
ldr r9, SDCFG_VAL
and r9, r9, r10
str r9, [r8]
/* Program SDRAM SDREF Config Register */
ldr r6, SDREF
ldr r7, SDREF_VAL
str r7, [r6]
/*------------------------------------------------------*
* Issue Soft Reset to DDR Module *
*------------------------------------------------------*/
/* Issue a Dummy DDR2 read/write */
ldr r8, DDR2_START_ADDR
ldr r7, DUMMY_VAL
str r7, [r8]
ldr r7, [r8]
/* Shut down the DDR2 LPSC Module */
ldr r8, PSC_FLAG_CLEAR
ldr r6, MDCTL_DDR2
ldr r7, [r6]
and r7, r7, r8
orr r7, r7, $0x01
str r7, [r6]
/* Enable the Power Domain Transition Command */
ldr r6, PTCMD
ldr r7, [r6]
orr r7, r7, $0x01
str r7, [r6]
/* Check for Transition Complete(PTSTAT) */
checkStatClkStop2:
ldr r6, PTSTAT
ldr r7, [r6]
ands r7, r7, $0x01
bne checkStatClkStop2
/* Check for DDR2 Controller Enable Completion */
checkDDRStatClkStop2:
ldr r6, MDSTAT_DDR2
ldr r7, [r6]
and r7, r7, $MDSTAT_STATE
cmp r7, $0x01
bne checkDDRStatClkStop2
/*------------------------------------------------------*
* Turn DDR2 Controller Clocks On *
*------------------------------------------------------*/
/* Enable the DDR2 LPSC Module */
ldr r6, MDCTL_DDR2
ldr r7, [r6]
orr r7, r7, $0x03
str r7, [r6]
/* Enable the Power Domain Transition Command */
ldr r6, PTCMD
ldr r7, [r6]
orr r7, r7, $0x01
str r7, [r6]
/* Check for Transition Complete(PTSTAT) */
checkStatClkEn2:
ldr r6, PTSTAT
ldr r7, [r6]
ands r7, r7, $0x01
bne checkStatClkEn2
/* Check for DDR2 Controller Enable Completion */
checkDDRStatClkEn2:
ldr r6, MDSTAT_DDR2
ldr r7, [r6]
and r7, r7, $MDSTAT_STATE
cmp r7, $0x03
bne checkDDRStatClkEn2
/* DDR Writes and Reads */
ldr r6, CFGTEST
mov r3, $0x01
str r3, [r6]
/*------------------------------------------------------*
* System PLL Initialization *
*------------------------------------------------------*/
/* Select the Clock Mode Depending on the Value written in the Boot Table by the run script */
mov r2, $0
ldr r6, PLL1_CTL
ldr r7, PLL_CLKSRC_MASK
ldr r8, [r6]
and r8, r8, r7
mov r9, r2, lsl $8
orr r8, r8, r9
str r8, [r6]
/* Select the PLLEN source */
ldr r7, PLL_ENSRC_MASK
and r8, r8, r7
str r8, [r6]
/* Bypass the PLL */
ldr r7, PLL_BYPASS_MASK
and r8, r8, r7
str r8, [r6]
/* Wait for few cycles to allow PLLEN Mux switch properly to bypass Clock */
mov r10, $0x20
WaitLoop:
subs r10, r10, $1
bne WaitLoop
/* Reset the PLL */
ldr r7, PLL_RESET_MASK
and r8, r8, r7
str r8, [r6]
/* Disable the PLL */
orr r8, r8, $0x10
str r8, [r6]
/* Power up the PLL */
ldr r7, PLL_PWRUP_MASK
and r8, r8, r7
str r8, [r6]
/* Enable the PLL from Disable Mode */
ldr r7, PLL_DISABLE_ENABLE_MASK
and r8, r8, r7
str r8, [r6]
/* Program the PLL Multiplier */
ldr r6, PLL1_PLLM
mov r3, $0x15 /* For 594MHz */
str r3, [r6]
/* Wait for PLL to Reset Properly */
mov r10, $0xff
ResetLoop:
subs r10, r10, $1
bne ResetLoop
/* Bring PLL out of Reset */
ldr r6, PLL1_CTL
orr r8, r8, $0x08
str r8, [r6]
/* Wait for PLL to Lock */
ldr r10, PLL_LOCK_COUNT
PLL1Lock:
subs r10, r10, $1
bne PLL1Lock
/* Enable the PLL */
orr r8, r8, $0x01
str r8, [r6]
nop
nop
nop
nop
/*------------------------------------------------------*
* AEMIF configuration for NOR Flash (double check) *
*------------------------------------------------------*/
ldr r0, _PINMUX0
ldr r1, _DEV_SETTING
str r1, [r0]
ldr r0, WAITCFG
ldr r1, WAITCFG_VAL
ldr r2, [r0]
orr r2, r2, r1
str r2, [r0]
ldr r0, ACFG3
ldr r1, ACFG3_VAL
ldr r2, [r0]
and r1, r2, r1
str r1, [r0]
ldr r0, ACFG4
ldr r1, ACFG4_VAL
ldr r2, [r0]
and r1, r2, r1
str r1, [r0]
ldr r0, ACFG5
ldr r1, ACFG5_VAL
ldr r2, [r0]
and r1, r2, r1
str r1, [r0]
/*--------------------------------------*
* VTP manual Calibration *
*--------------------------------------*/
ldr r0, VTPIOCR
ldr r1, VTP_MMR0
str r1, [r0]
ldr r0, VTPIOCR
ldr r1, VTP_MMR1
str r1, [r0]
/* Wait for 33 VTP CLK cycles. VRP operates at 27 MHz */
ldr r10, VTP_LOCK_COUNT
VTPLock:
subs r10, r10, $1
bne VTPLock
ldr r6, DFT_ENABLE
mov r10, $0x01
str r10, [r6]
ldr r6, DDRVTPR
ldr r7, [r6]
and r7, r7, $0x1f
and r8, r7, $0x3e0
orr r8, r7, r8
ldr r7, VTP_RECAL
orr r8, r7, r8
ldr r7, VTP_EN
orr r8, r7, r8
str r8, [r0]
/* Wait for 33 VTP CLK cycles. VRP operates at 27 MHz */
ldr r10, VTP_LOCK_COUNT
VTP1Lock:
subs r10, r10, $1
bne VTP1Lock
ldr r1, [r0]
ldr r2, VTP_MASK
and r2, r1, r2
str r2, [r0]
ldr r6, DFT_ENABLE
mov r10, $0
str r10, [r6]
/*
* Call board-specific lowlevel init.
* That MUST be present and THAT returns
* back to arch calling code with "mov pc, lr."
*/
b dv_board_init
.ltorg
_PINMUX0:
.word 0x01c40000 /* Device Configuration Registers */
_PINMUX1:
.word 0x01c40004 /* Device Configuration Registers */
_DEV_SETTING:
.word 0x00000c1f
WAITCFG:
.word 0x01e00004
WAITCFG_VAL:
.word 0
ACFG3:
.word 0x01e00014
ACFG3_VAL:
.word 0x3ffffffd
ACFG4:
.word 0x01e00018
ACFG4_VAL:
.word 0x3ffffffd
ACFG5:
.word 0x01e0001c
ACFG5_VAL:
.word 0x3ffffffd
MDCTL_DDR2:
.word 0x01c41a34
MDSTAT_DDR2:
.word 0x01c41834
PTCMD:
.word 0x01c41120
PTSTAT:
.word 0x01c41128
EINT_ENABLE0:
.word 0x01c48018
EINT_ENABLE1:
.word 0x01c4801c
PSC_FLAG_CLEAR:
.word 0xffffffe0
PSC_GEM_FLAG_CLEAR:
.word 0xfffffeff
/* DDR2 MMR & CONFIGURATION VALUES, 162 MHZ clock */
DDRCTL:
.word 0x200000e4
DDRCTL_VAL:
.word 0x50006405
SDREF:
.word 0x2000000c
SDREF_VAL:
.word 0x000005c3
SDCFG:
.word 0x20000008
SDCFG_VAL:
#ifdef DDR_4BANKS
.word 0x00178622
#elif defined DDR_8BANKS
.word 0x00178632
#else
#error "Unknown DDR configuration!!!"
#endif
SDTIM0:
.word 0x20000010
SDTIM0_VAL_162MHz:
.word 0x28923211
SDTIM1:
.word 0x20000014
SDTIM1_VAL_162MHz:
.word 0x0016c722
VTPIOCR:
.word 0x200000f0 /* VTP IO Control register */
DDRVTPR:
.word 0x01c42030 /* DDR VPTR MMR */
VTP_MMR0:
.word 0x201f
VTP_MMR1:
.word 0xa01f
DFT_ENABLE:
.word 0x01c4004c
VTP_LOCK_COUNT:
.word 0x5b0
VTP_MASK:
.word 0xffffdfff
VTP_RECAL:
.word 0x40000
VTP_EN:
.word 0x02000
CFGTEST:
.word 0x80010000
MASK_VAL:
.word 0x00000fff
/* GEM Power Up & LPSC Control Register */
MDCTL_GEM:
.word 0x01c41a9c
MDSTAT_GEM:
.word 0x01c4189c
/* For WDT reset chip bug */
P1394:
.word 0x01c41a20
PLL_CLKSRC_MASK:
.word 0xfffffeff /* Mask the Clock Mode bit */
PLL_ENSRC_MASK:
.word 0xffffffdf /* Select the PLLEN source */
PLL_BYPASS_MASK:
.word 0xfffffffe /* Put the PLL in BYPASS */
PLL_RESET_MASK:
.word 0xfffffff7 /* Put the PLL in Reset Mode */
PLL_PWRUP_MASK:
.word 0xfffffffd /* PLL Power up Mask Bit */
PLL_DISABLE_ENABLE_MASK:
.word 0xffffffef /* Enable the PLL from Disable */
PLL_LOCK_COUNT:
.word 0x2000
/* PLL1-SYSTEM PLL MMRs */
PLL1_CTL:
.word 0x01c40900
PLL1_PLLM:
.word 0x01c40910
/* PLL2-SYSTEM PLL MMRs */
PLL2_CTL:
.word 0x01c40d00
PLL2_PLLM:
.word 0x01c40d10
PLL2_DIV1:
.word 0x01c40d18
PLL2_DIV2:
.word 0x01c40d1c
PLL2_PLLCMD:
.word 0x01c40d38
PLL2_PLLSTAT:
.word 0x01c40d3c
PLL2_DIV_MASK:
.word 0xffff7fff
MMARG_BRF0:
.word 0x01c42010 /* BRF margin mode 0 (R/W)*/
MMARG_BRF0_VAL:
.word 0x00444400
DDR2_START_ADDR:
.word 0x80000000
DUMMY_VAL:
.word 0xa55aa55a
#else /* CONFIG_SOC_DM644X */
mov pc, lr
#endif
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