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/*
* Copyright (C) 2010 Freescale Semiconductor, Inc.
*
* 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/mx53.h>
/*
* L2CC Cache setup/invalidation/disable
*/
.macro init_l2cc
/* explicitly disable L2 cache */
mrc 15, 0, r0, c1, c0, 1
bic r0, r0, #0x2
mcr 15, 0, r0, c1, c0, 1
/* reconfigure L2 cache aux control reg */
mov r0, #0xC0 /* tag RAM */
add r0, r0, #0x4 /* data RAM */
orr r0, r0, #(1 << 24) /* disable write allocate delay */
orr r0, r0, #(1 << 23) /* disable write allocate combine */
orr r0, r0, #(1 << 22) /* disable write allocate */
mcr 15, 1, r0, c9, c0, 2
.endm /* init_l2cc */
/* AIPS setup - Only setup MPROTx registers.
* The PACR default values are good.*/
.macro init_aips
/*
* Set all MPROTx to be non-bufferable, trusted for R/W,
* not forced to user-mode.
*/
ldr r0, =AIPS1_BASE_ADDR
ldr r1, =0x77777777
str r1, [r0, #0x0]
str r1, [r0, #0x4]
ldr r0, =AIPS2_BASE_ADDR
str r1, [r0, #0x0]
str r1, [r0, #0x4]
.endm /* init_aips */
.macro setup_pll pll, freq
ldr r0, =\pll
ldr r1, =0x00001232
str r1, [r0, #PLL_DP_CTL]
mov r1, #0x2
str r1, [r0, #PLL_DP_CONFIG]
ldr r1, W_DP_OP_\freq
str r1, [r0, #PLL_DP_OP]
str r1, [r0, #PLL_DP_HFS_OP]
ldr r1, W_DP_MFD_\freq
str r1, [r0, #PLL_DP_MFD]
str r1, [r0, #PLL_DP_HFS_MFD]
ldr r1, W_DP_MFN_\freq
str r1, [r0, #PLL_DP_MFN]
str r1, [r0, #PLL_DP_HFS_MFN]
ldr r1, =0x00001232
str r1, [r0, #PLL_DP_CTL]
1: ldr r1, [r0, #PLL_DP_CTL]
ands r1, r1, #0x1
beq 1b
.endm
.macro init_clock
ldr r0, =ROM_SI_REV
ldr r1, [r0]
cmp r1, #0x20
/* For TO2 only, set LDO to 1.3V */
ldr r0, =0x53fa8000
ldr r1, =0x00194005
streq r1, [r0, #0x04]
ldr r0, CCM_BASE_ADDR_W
/* Switch ARM to step clock */
mov r1, #0x4
str r1, [r0, #CLKCTL_CCSR]
setup_pll PLL1_BASE_ADDR, 1000
setup_pll PLL3_BASE_ADDR, 400
/* Switch peripheral to PLL3 */
ldr r0, CCM_BASE_ADDR_W
ldr r1, CCM_VAL_0x00015154
str r1, [r0, #CLKCTL_CBCMR]
ldr r1, CCM_VAL_0x02888945
orr r1, r1, #(1 << 16)
str r1, [r0, #CLKCTL_CBCDR]
/* make sure change is effective */
1: ldr r1, [r0, #CLKCTL_CDHIPR]
cmp r1, #0x0
bne 1b
setup_pll PLL2_BASE_ADDR, CONFIG_SYS_PLL2_FREQ
/* Switch peripheral to PLL2 */
ldr r0, CCM_BASE_ADDR_W
ldr r1, CCM_VAL_0x00808145
orr r1, r1, #(CONFIG_SYS_AHB_PODF << 10)
orr r1, r1, #(CONFIG_SYS_AXIA_PODF << 16)
orr r1, r1, #(CONFIG_SYS_AXIB_PODF << 19)
str r1, [r0, #CLKCTL_CBCDR]
ldr r1, CCM_VAL_0x00016154
str r1, [r0, #CLKCTL_CBCMR]
/* make sure change is effective */
1: ldr r1, [r0, #CLKCTL_CDHIPR]
cmp r1, #0x0
bne 1b
setup_pll PLL3_BASE_ADDR, 216
/* Set the platform clock dividers */
ldr r0, PLATFORM_BASE_ADDR_W
ldr r1, PLATFORM_CLOCK_DIV_W
str r1, [r0, #PLATFORM_ICGC]
ldr r0, CCM_BASE_ADDR_W
mov r1, #0
str r1, [r0, #CLKCTL_CACRR]
/* Switch ARM back to PLL 1. */
mov r1, #0x0
str r1, [r0, #CLKCTL_CCSR]
ldr r1, [r0, #CLKCTL_CSCDR1]
orr r1, r1, #0x3f
eor r1, r1, #0x3f
orr r1, r1, #0x21
str r1, [r0, #CLKCTL_CSCDR1]
/* Restore the default values in the Gate registers */
ldr r1, =0xFFFFFFFF
str r1, [r0, #CLKCTL_CCGR0]
str r1, [r0, #CLKCTL_CCGR1]
str r1, [r0, #CLKCTL_CCGR2]
str r1, [r0, #CLKCTL_CCGR3]
str r1, [r0, #CLKCTL_CCGR4]
str r1, [r0, #CLKCTL_CCGR5]
str r1, [r0, #CLKCTL_CCGR6]
str r1, [r0, #CLKCTL_CCGR7]
mov r1, #0x00000
str r1, [r0, #CLKCTL_CCDR]
/* for cko - for ARM div by 8 */
mov r1, #0x000A0000
add r1, r1, #0x00000F0
str r1, [r0, #CLKCTL_CCOSR]
.endm
.section ".text.init", "x"
.globl lowlevel_init
lowlevel_init:
#ifdef ENABLE_IMPRECISE_ABORT
mrs r1, spsr /* save old spsr */
mrs r0, cpsr /* read out the cpsr */
bic r0, r0, #0x100 /* clear the A bit */
msr spsr, r0 /* update spsr */
add lr, pc, #0x8 /* update lr */
movs pc, lr /* update cpsr */
nop
nop
nop
nop
msr spsr, r1 /* restore old spsr */
#endif
/* SYS_ON_OFF_CTL (GPIO7) must be set to HIGH as the
* first action in the BOOT sequence.
*/
ldr r0, =GPIO1_BASE_ADDR
ldr r1, [r0, #0x0]
orr r1, r1, #(1 << 7)
str r1, [r0, #0x0]
ldr r1, [r0, #0x4]
orr r1, r1, #(1 << 7)
str r1, [r0, #0x4]
/* ARM errata ID #468414 */
mrc 15, 0, r1, c1, c0, 1
orr r1, r1, #(1 << 5) /* enable L1NEON bit */
mcr 15, 0, r1, c1, c0, 1
init_l2cc
init_aips
init_clock
mov pc, lr
/* Board level setting value */
CCM_BASE_ADDR_W: .word CCM_BASE_ADDR
CCM_VAL_0x00016154: .word 0x00016154
CCM_VAL_0x00808145: .word 0x00808145
CCM_VAL_0x00015154: .word 0x00015154
CCM_VAL_0x02888945: .word 0x02888945
W_DP_OP_1000: .word DP_OP_1000
W_DP_MFD_1000: .word DP_MFD_1000
W_DP_MFN_1000: .word DP_MFN_1000
W_DP_OP_800: .word DP_OP_800
W_DP_MFD_800: .word DP_MFD_800
W_DP_MFN_800: .word DP_MFN_800
W_DP_OP_600: .word DP_OP_600
W_DP_MFD_600: .word DP_MFD_600
W_DP_MFN_600: .word DP_MFN_600
W_DP_OP_400: .word DP_OP_400
W_DP_MFD_400: .word DP_MFD_400
W_DP_MFN_400: .word DP_MFN_400
W_DP_OP_216: .word DP_OP_216
W_DP_MFD_216: .word DP_MFD_216
W_DP_MFN_216: .word DP_MFN_216
PLATFORM_BASE_ADDR_W: .word ARM_BASE_ADDR
PLATFORM_CLOCK_DIV_W: .word 0x00000124
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