u-boot/board/ti/omap5912osk/lowlevel_init.S
Jon Hunter 2a309f33de omap5912-osk: Fix device initialisation
In the current u-boot, the device pin multiplexing and clock
initialisation needs to be early during the boot process and before
board_init() is called. U-boot is currently crashing on this board
because this is not being done early enough. Therefore, add a s_init()
function for the omap5912-osk board to do this.

Also fix the stack pointer so that it is pointing to the end of the
internal RAM and not the beginning as this was also causing the device
to crash.

Signed-off-by: Jon Hunter <jon-hunter@ti.com>
2013-04-10 16:03:01 -04:00

497 lines
11 KiB
ArmAsm

/*
* 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.
*
* 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>
#if defined(CONFIG_OMAP1610)
#include <./configs/omap1510.h>
#endif
_TEXT_BASE:
.word CONFIG_SYS_TEXT_BASE /* sdram load addr from config.mk */
.globl lowlevel_init
lowlevel_init:
/*------------------------------------------------------*
* Ensure i-cache is enabled *
* To configure TC regs without fetching instruction *
*------------------------------------------------------*/
mrc p15, 0, r0, c1, c0
orr r0, r0, #0x1000
mcr p15, 0, r0, c1, c0
/*------------------------------------------------------*
*mask all IRQs by setting all bits in the INTMR default*
*------------------------------------------------------*/
mov r1, #0xffffffff
ldr r0, =REG_IHL1_MIR
str r1, [r0]
ldr r0, =REG_IHL2_MIR
str r1, [r0]
/*------------------------------------------------------*
* Set up ARM CLM registers (IDLECT1) *
*------------------------------------------------------*/
ldr r0, REG_ARM_IDLECT1
ldr r1, VAL_ARM_IDLECT1
str r1, [r0]
/*------------------------------------------------------*
* Set up ARM CLM registers (IDLECT2) *
*------------------------------------------------------*/
ldr r0, REG_ARM_IDLECT2
ldr r1, VAL_ARM_IDLECT2
str r1, [r0]
/*------------------------------------------------------*
* Set up ARM CLM registers (IDLECT3) *
*------------------------------------------------------*/
ldr r0, REG_ARM_IDLECT3
ldr r1, VAL_ARM_IDLECT3
str r1, [r0]
mov r1, #0x01 /* PER_EN bit */
ldr r0, REG_ARM_RSTCT2
strh r1, [r0] /* CLKM; Peripheral reset. */
/* Set CLKM to Sync-Scalable */
mov r1, #0x1000
ldr r0, REG_ARM_SYSST
mov r2, #0
1: cmp r2, #1
streqh r1, [r0]
add r2, r2, #1
cmp r2, #0x100 /* wait for any bubbles to finish */
bne 1b
ldr r1, VAL_ARM_CKCTL
ldr r0, REG_ARM_CKCTL
strh r1, [r0]
/* a few nops to let settle */
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
/* setup DPLL 1 */
/* Ramp up the clock to 96Mhz */
ldr r1, VAL_DPLL1_CTL
ldr r0, REG_DPLL1_CTL
strh r1, [r0]
ands r1, r1, #0x10 /* Check if PLL is enabled. */
beq lock_end /* Do not look for lock if BYPASS selected */
2:
ldrh r1, [r0]
ands r1, r1, #0x01 /* Check the LOCK bit.*/
beq 2b /* loop until bit goes hi. */
lock_end:
/*------------------------------------------------------*
* Turn off the watchdog during init... *
*------------------------------------------------------*/
ldr r0, REG_WATCHDOG
ldr r1, WATCHDOG_VAL1
str r1, [r0]
ldr r1, WATCHDOG_VAL2
str r1, [r0]
ldr r0, REG_WSPRDOG
ldr r1, WSPRDOG_VAL1
str r1, [r0]
ldr r0, REG_WWPSDOG
watch1Wait:
ldr r1, [r0]
tst r1, #0x10
bne watch1Wait
ldr r0, REG_WSPRDOG
ldr r1, WSPRDOG_VAL2
str r1, [r0]
ldr r0, REG_WWPSDOG
watch2Wait:
ldr r1, [r0]
tst r1, #0x10
bne watch2Wait
/* Set memory timings corresponding to the new clock speed */
ldr r3, VAL_SDRAM_CONFIG_SDF0
/* Check execution location to determine current execution location
* and branch to appropriate initialization code.
*/
mov r0, #0x10000000 /* Load physical SDRAM base. */
mov r1, pc /* Get current execution location. */
cmp r1, r0 /* Compare. */
bge skip_sdram /* Skip over EMIF-fast initialization if running from SDRAM. */
/* identify the device revision, -- TMX or TMP(TMS) */
ldr r0, REG_DEVICE_ID
ldr r1, [r0]
ldr r0, VAL_DEVICE_ID_TMP
mov r1, r1, lsl #15
mov r1, r1, lsr #16
cmp r0, r1
bne skip_TMP_Patch
/* Enable TMP/TMS device new features */
mov r0, #1
ldr r1, REG_TC_EMIFF_DOUBLER
str r0, [r1]
/* Enable new ac parameters */
mov r0, #0x0b
ldr r1, REG_SDRAM_CONFIG2
str r0, [r1]
ldr r3, VAL_SDRAM_CONFIG_SDF1
skip_TMP_Patch:
/*
* Delay for SDRAM initialization.
*/
mov r0, #0x1800 /* value should be checked */
3:
subs r0, r0, #0x1 /* Decrement count */
bne 3b
/*
* Set SDRAM control values. Disable refresh before MRS command.
*/
/* mobile ddr operation */
ldr r0, REG_SDRAM_OPERATION
mov r2, #07
str r2, [r0]
/* config register */
ldr r0, REG_SDRAM_CONFIG
str r3, [r0]
/* manual command register */
ldr r0, REG_SDRAM_MANUAL_CMD
/* issue set cke high */
mov r1, #CMD_SDRAM_CKE_SET_HIGH
str r1, [r0]
/* issue nop */
mov r1, #CMD_SDRAM_NOP
str r1, [r0]
mov r2, #0x0100
waitMDDR1:
subs r2, r2, #1
bne waitMDDR1 /* delay loop */
/* issue precharge */
mov r1, #CMD_SDRAM_PRECHARGE
str r1, [r0]
/* issue autorefresh x 2 */
mov r1, #CMD_SDRAM_AUTOREFRESH
str r1, [r0]
str r1, [r0]
/* mrs register ddr mobile */
ldr r0, REG_SDRAM_MRS
mov r1, #0x33
str r1, [r0]
/* emrs1 low-power register */
ldr r0, REG_SDRAM_EMRS1
/* self refresh on all banks */
mov r1, #0
str r1, [r0]
ldr r0, REG_DLL_URD_CONTROL
ldr r1, DLL_URD_CONTROL_VAL
str r1, [r0]
ldr r0, REG_DLL_LRD_CONTROL
ldr r1, DLL_LRD_CONTROL_VAL
str r1, [r0]
ldr r0, REG_DLL_WRT_CONTROL
ldr r1, DLL_WRT_CONTROL_VAL
str r1, [r0]
/* delay loop */
mov r0, #0x0100
waitMDDR2:
subs r0, r0, #1
bne waitMDDR2
/*
* Delay for SDRAM initialization.
*/
mov r0, #0x1800
4:
subs r0, r0, #1 /* Decrement count. */
bne 4b
b common_tc
skip_sdram:
ldr r0, REG_SDRAM_CONFIG
str r3, [r0]
common_tc:
/* slow interface */
ldr r1, VAL_TC_EMIFS_CS0_CONFIG
ldr r0, REG_TC_EMIFS_CS0_CONFIG
str r1, [r0] /* Chip Select 0 */
ldr r1, VAL_TC_EMIFS_CS1_CONFIG
ldr r0, REG_TC_EMIFS_CS1_CONFIG
str r1, [r0] /* Chip Select 1 */
ldr r1, VAL_TC_EMIFS_CS3_CONFIG
ldr r0, REG_TC_EMIFS_CS3_CONFIG
str r1, [r0] /* Chip Select 3 */
ldr r1, VAL_TC_EMIFS_DWS
ldr r0, REG_TC_EMIFS_DWS
str r1, [r0] /* Enable EMIFS.RDY for CS1 (ether) */
#ifdef CONFIG_H2_OMAP1610
/* inserting additional 2 clock cycle hold time for LAN */
ldr r0, REG_TC_EMIFS_CS1_ADVANCED
ldr r1, VAL_TC_EMIFS_CS1_ADVANCED
str r1, [r0]
#endif
/* Start MPU Timer 1 */
ldr r0, REG_MPU_LOAD_TIMER
ldr r1, VAL_MPU_LOAD_TIMER
str r1, [r0]
ldr r0, REG_MPU_CNTL_TIMER
ldr r1, VAL_MPU_CNTL_TIMER
str r1, [r0]
/*
* Setup a temporary stack
*/
ldr sp, SRAM_STACK
bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
/*
* Save the old lr(passed in ip) and the current lr to stack
*/
push {ip, lr}
/*
* go setup pll, mux, memory
*/
bl s_init
pop {ip, pc}
/* back to arch calling code */
mov pc, lr
/* the literal pools origin */
.ltorg
REG_DEVICE_ID: /* 32 bits */
.word 0xfffe2004
REG_TC_EMIFS_CONFIG:
.word 0xfffecc0c
REG_TC_EMIFS_CS0_CONFIG: /* 32 bits */
.word 0xfffecc10
REG_TC_EMIFS_CS1_CONFIG: /* 32 bits */
.word 0xfffecc14
REG_TC_EMIFS_CS2_CONFIG: /* 32 bits */
.word 0xfffecc18
REG_TC_EMIFS_CS3_CONFIG: /* 32 bits */
.word 0xfffecc1c
REG_TC_EMIFS_DWS: /* 32 bits */
.word 0xfffecc40
#ifdef CONFIG_H2_OMAP1610
REG_TC_EMIFS_CS1_ADVANCED: /* 32 bits */
.word 0xfffecc54
#endif
/* MPU clock/reset/power mode control registers */
REG_ARM_CKCTL: /* 16 bits */
.word 0xfffece00
REG_ARM_IDLECT3: /* 16 bits */
.word 0xfffece24
REG_ARM_IDLECT2: /* 16 bits */
.word 0xfffece08
REG_ARM_IDLECT1: /* 16 bits */
.word 0xfffece04
REG_ARM_RSTCT2: /* 16 bits */
.word 0xfffece14
REG_ARM_SYSST: /* 16 bits */
.word 0xfffece18
/* DPLL control registers */
REG_DPLL1_CTL: /* 16 bits */
.word 0xfffecf00
/* Watch Dog register */
/* secure watchdog stop */
REG_WSPRDOG:
.word 0xfffeb048
/* watchdog write pending */
REG_WWPSDOG:
.word 0xfffeb034
WSPRDOG_VAL1:
.word 0x0000aaaa
WSPRDOG_VAL2:
.word 0x00005555
/* SDRAM config is: auto refresh enabled, 16 bit 4 bank,
counter @8192 rows, 10 ns, 8 burst */
REG_SDRAM_CONFIG:
.word 0xfffecc20
REG_SDRAM_CONFIG2:
.word 0xfffecc3c
REG_TC_EMIFF_DOUBLER: /* 32 bits */
.word 0xfffecc60
/* Operation register */
REG_SDRAM_OPERATION:
.word 0xfffecc80
/* Manual command register */
REG_SDRAM_MANUAL_CMD:
.word 0xfffecc84
/* SDRAM MRS (New) config is: CAS latency is 2, burst length 8 */
REG_SDRAM_MRS:
.word 0xfffecc70
/* SDRAM MRS (New) config is: CAS latency is 2, burst length 8 */
REG_SDRAM_EMRS1:
.word 0xfffecc78
/* WRT DLL register */
REG_DLL_WRT_CONTROL:
.word 0xfffecc68
DLL_WRT_CONTROL_VAL:
.word 0x03f00002 /* Phase of 72deg, write offset +31 */
/* URD DLL register */
REG_DLL_URD_CONTROL:
.word 0xfffeccc0
DLL_URD_CONTROL_VAL:
.word 0x00800002 /* Phase of 72deg, read offset +31 */
/* LRD DLL register */
REG_DLL_LRD_CONTROL:
.word 0xfffecccc
DLL_LRD_CONTROL_VAL:
.word 0x00800002 /* read offset +31 */
REG_WATCHDOG:
.word 0xfffec808
WATCHDOG_VAL1:
.word 0x000000f5
WATCHDOG_VAL2:
.word 0x000000a0
REG_MPU_LOAD_TIMER:
.word 0xfffec504
REG_MPU_CNTL_TIMER:
.word 0xfffec500
VAL_MPU_LOAD_TIMER:
.word 0xffffffff
VAL_MPU_CNTL_TIMER:
.word 0xffffffa1
/* 96 MHz Samsung Mobile DDR */
/* Original setting for TMX device */
VAL_SDRAM_CONFIG_SDF0:
.word 0x0014e6fe
/* NEW_SYS_FREQ mode (valid only TMP/TMS devices) */
VAL_SDRAM_CONFIG_SDF1:
.word 0x0114e6fe
VAL_ARM_CKCTL:
.word 0x2000 /* was: 0x3000, now use CLK_REF for timer input */
VAL_DPLL1_CTL:
.word 0x2830
#ifdef CONFIG_OSK_OMAP5912
VAL_TC_EMIFS_CS0_CONFIG:
.word 0x002130b0
VAL_TC_EMIFS_CS1_CONFIG:
.word 0x00001133
VAL_TC_EMIFS_CS2_CONFIG:
.word 0x000055f0
VAL_TC_EMIFS_CS3_CONFIG:
.word 0x88013141
VAL_TC_EMIFS_DWS: /* Enable EMIFS.RDY for CS1 access (ether) */
.word 0x000000c0
VAL_DEVICE_ID_TMP: /* TMP/TMS=0xb65f, TMX=0xb58c */
.word 0xb65f
#endif
#ifdef CONFIG_H2_OMAP1610
VAL_TC_EMIFS_CS0_CONFIG:
.word 0x00203331
VAL_TC_EMIFS_CS1_CONFIG:
.word 0x8180fff3
VAL_TC_EMIFS_CS2_CONFIG:
.word 0xf800f22a
VAL_TC_EMIFS_CS3_CONFIG:
.word 0x88013141
VAL_TC_EMIFS_CS1_ADVANCED:
.word 0x00000022
#endif
VAL_ARM_IDLECT1:
.word 0x00000400
VAL_ARM_IDLECT2:
.word 0x00000886
VAL_ARM_IDLECT3:
.word 0x00000015
SRAM_STACK:
.word CONFIG_SYS_INIT_SP_ADDR
/* command values */
.equ CMD_SDRAM_NOP, 0x00000000
.equ CMD_SDRAM_PRECHARGE, 0x00000001
.equ CMD_SDRAM_AUTOREFRESH, 0x00000002
.equ CMD_SDRAM_CKE_SET_HIGH, 0x00000007