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/*
* Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
*
* (C) Copyright 2008-2010 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/imx-regs.h>
#include <generated/asm-offsets.h>
#include "mx35pdk.h"
#include <asm/arch/lowlevel_macro.S>
/*
* return soc version
* 0x10: TO1
* 0x20: TO2
* 0x30: TO3
*/
.macro check_soc_version ret, tmp
ldr \tmp, =IIM_BASE_ADDR
ldr \ret, [\tmp, #IIM_SREV]
cmp \ret, #0x00
moveq \tmp, #ROMPATCH_REV
ldreq \ret, [\tmp]
moveq \ret, \ret, lsl #4
addne \ret, \ret, #0x10
.endm
/* CPLD on CS5 setup */
.macro init_debug_board
ldr r0, =DBG_BASE_ADDR
ldr r1, =DBG_CSCR_U_CONFIG
str r1, [r0, #0x00]
ldr r1, =DBG_CSCR_L_CONFIG
str r1, [r0, #0x04]
ldr r1, =DBG_CSCR_A_CONFIG
str r1, [r0, #0x08]
.endm
/* clock setup */
.macro init_clock
ldr r0, =CCM_BASE_ADDR
/* default CLKO to 1/32 of the ARM core*/
ldr r1, [r0, #CLKCTL_COSR]
bic r1, r1, #0x00000FF00
bic r1, r1, #0x0000000FF
mov r2, #0x00006C00
add r2, r2, #0x67
orr r1, r1, r2
str r1, [r0, #CLKCTL_COSR]
ldr r2, =CCM_CCMR_CONFIG
str r2, [r0, #CLKCTL_CCMR]
check_soc_version r1, r2
cmp r1, #CHIP_REV_2_0
ldrhs r3, =CCM_MPLL_532_HZ
bhs 1f
ldr r2, [r0, #CLKCTL_PDR0]
tst r2, #CLKMODE_CONSUMER
ldrne r3, =CCM_MPLL_532_HZ /* consumer path*/
ldreq r3, =CCM_MPLL_399_HZ /* auto path*/
1:
str r3, [r0, #CLKCTL_MPCTL]
ldr r1, =CCM_PPLL_300_HZ
str r1, [r0, #CLKCTL_PPCTL]
ldr r1, =CCM_PDR0_CONFIG
bic r1, r1, #0x800000
str r1, [r0, #CLKCTL_PDR0]
ldr r1, [r0, #CLKCTL_CGR0]
orr r1, r1, #0x0C300000
str r1, [r0, #CLKCTL_CGR0]
ldr r1, [r0, #CLKCTL_CGR1]
orr r1, r1, #0x00000C00
orr r1, r1, #0x00000003
str r1, [r0, #CLKCTL_CGR1]
ldr r1, [r0, #CLKCTL_CGR2]
orr r1, r1, #0x00C00000
str r1, [r0, #CLKCTL_CGR2]
.endm
.macro setup_sdram
ldr r0, =ESDCTL_BASE_ADDR
mov r3, #0x2000
str r3, [r0, #0x0]
str r3, [r0, #0x8]
/*ip(r12) has used to save lr register in upper calling*/
mov fp, lr
mov r5, #0x00
mov r2, #0x00
mov r1, #CSD0_BASE_ADDR
bl setup_sdram_bank
mov r5, #0x00
mov r2, #0x00
mov r1, #CSD1_BASE_ADDR
bl setup_sdram_bank
mov lr, fp
1:
ldr r3, =ESDCTL_DELAY_LINE5
str r3, [r0, #0x30]
.endm
.globl lowlevel_init
lowlevel_init:
mov r10, lr
core_init
init_aips
init_max
init_m3if
init_clock
init_debug_board
cmp pc, #PHYS_SDRAM_1
blo init_sdram_start
cmp pc, #(PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE)
blo skip_sdram_setup
init_sdram_start:
/*init_sdram*/
setup_sdram
skip_sdram_setup:
mov lr, r10
mov pc, lr
/*
* r0: ESDCTL control base, r1: sdram slot base
* r2: DDR type(0:DDR2, 1:MDDR) r3, r4:working base
*/
setup_sdram_bank:
mov r3, #0xE
tst r2, #0x1
orreq r3, r3, #0x300 /*DDR2*/
str r3, [r0, #0x10]
bic r3, r3, #0x00A
str r3, [r0, #0x10]
beq 2f
mov r3, #0x20000
1: subs r3, r3, #1
bne 1b
2: tst r2, #0x1
ldreq r3, =ESDCTL_DDR2_CONFIG
ldrne r3, =ESDCTL_MDDR_CONFIG
cmp r1, #CSD1_BASE_ADDR
strlo r3, [r0, #0x4]
strhs r3, [r0, #0xC]
ldr r3, =ESDCTL_0x92220000
strlo r3, [r0, #0x0]
strhs r3, [r0, #0x8]
mov r3, #0xDA
ldr r4, =ESDCTL_PRECHARGE
strb r3, [r1, r4]
tst r2, #0x1
bne skip_set_mode
cmp r1, #CSD1_BASE_ADDR
ldr r3, =ESDCTL_0xB2220000
strlo r3, [r0, #0x0]
strhs r3, [r0, #0x8]
mov r3, #0xDA
ldr r4, =ESDCTL_DDR2_EMR2
strb r3, [r1, r4]
ldr r4, =ESDCTL_DDR2_EMR3
strb r3, [r1, r4]
ldr r4, =ESDCTL_DDR2_EN_DLL
strb r3, [r1, r4]
ldr r4, =ESDCTL_DDR2_RESET_DLL
strb r3, [r1, r4]
ldr r3, =ESDCTL_0x92220000
strlo r3, [r0, #0x0]
strhs r3, [r0, #0x8]
mov r3, #0xDA
ldr r4, =ESDCTL_PRECHARGE
strb r3, [r1, r4]
skip_set_mode:
cmp r1, #CSD1_BASE_ADDR
ldr r3, =ESDCTL_0xA2220000
strlo r3, [r0, #0x0]
strhs r3, [r0, #0x8]
mov r3, #0xDA
strb r3, [r1]
strb r3, [r1]
ldr r3, =ESDCTL_0xB2220000
strlo r3, [r0, #0x0]
strhs r3, [r0, #0x8]
tst r2, #0x1
ldreq r4, =ESDCTL_DDR2_MR
ldrne r4, =ESDCTL_MDDR_MR
mov r3, #0xDA
strb r3, [r1, r4]
ldreq r4, =ESDCTL_DDR2_OCD_DEFAULT
streqb r3, [r1, r4]
ldreq r4, =ESDCTL_DDR2_EN_DLL
ldrne r4, =ESDCTL_MDDR_EMR
strb r3, [r1, r4]
cmp r1, #CSD1_BASE_ADDR
ldr r3, =ESDCTL_0x82228080
strlo r3, [r0, #0x0]
strhs r3, [r0, #0x8]
tst r2, #0x1
moveq r4, #0x20000
movne r4, #0x200
1: subs r4, r4, #1
bne 1b
str r3, [r1, #0x100]
ldr r4, [r1, #0x100]
cmp r3, r4
movne r3, #1
moveq r3, #0
mov pc, lr
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