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/*
* Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
*
* (C) Copyright 2009 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/mx51.h>
#include "board-mx51_3stack.h"
/*
* return soc version
* 0x10: TO1
* 0x20: TO2
* 0x30: TO3
*/
.macro check_soc_version ret, tmp
.endm
/*
* L2CC Cache setup/invalidation/disable
*/
.macro init_l2cc
/* reconfigure L2 cache aux control reg */
ldr r0, =0x03C000C4
mcr p15, 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]
/*
* Clear the on and off peripheral modules Supervisor Protect bit
* for SDMA to access them. Did not change the AIPS control registers
* (offset 0x20) access type
*/
.endm /* init_aips */
/* MAX (Multi-Layer AHB Crossbar Switch) setup */
.macro init_max
.endm /* init_max */
/* M4IF setup */
.macro init_m4if
/* VPU and IPU given higher priority (0x4)
* IPU accesses with ID=0x1 given highest priority (=0xA)
*/
ldr r0, =M4IF_BASE_ADDR
ldr r1, =0x00000a01
str r1, [r0, #0x48]
ldr r1, =0x00000404
str r1, [r0, #0x40]
.endm /* init_m4if */
/* To support 133MHz DDR */
.macro init_drive_strength
.endm /* init_drive_strength */
/* CPLD on CS5 setup */
.macro init_debug_board
.endm /* init_debug_board */
.macro setup_pll pll, freq
ldr r2, =\pll
ldr r1, =0x00001232
str r1, [r2, #PLL_DP_CTL] /* Set DPLL ON (set UPEN bit): BRMO=1 */
mov r1, #0x2
str r1, [r2, #PLL_DP_CONFIG] /* Enable auto-restart AREN bit */
str r3, [r2, #PLL_DP_OP]
str r3, [r2, #PLL_DP_HFS_OP]
str r4, [r2, #PLL_DP_MFD]
str r4, [r2, #PLL_DP_HFS_MFD]
str r5, [r2, #PLL_DP_MFN]
str r5, [r2, #PLL_DP_HFS_MFN]
ldr r1, =0x00001232
str r1, [r2, #PLL_DP_CTL]
1: ldr r1, [r2, #PLL_DP_CTL]
ands r1, r1, #0x1
beq 1b
.endm
.macro init_clock
ldr r0, =CCM_BASE_ADDR
mov r1, #0x00060000
str r1, [r0, #CLKCTL_CCDR]
/* Switch ARM to step clock */
mov r1, #0x4
str r1, [r0, #CLKCTL_CCSR]
mov r3, #DP_OP_800
mov r4, #DP_MFD_800
mov r5, #DP_MFN_800
setup_pll PLL1_BASE_ADDR
mov r3, #DP_OP_665
mov r4, #DP_MFD_665
mov r5, #DP_MFN_665
setup_pll PLL3_BASE_ADDR
/* Switch peripheral to PLL 3 */
ldr r1, =0x0000D3C0
str r1, [r0, #CLKCTL_CBCMR]
ldr r1, =0x033B9145
str r1, [r0, #CLKCTL_CBCDR]
mov r3, #DP_OP_665
mov r4, #DP_MFD_665
mov r5, #DP_MFN_665
setup_pll PLL2_BASE_ADDR
/* Switch peripheral to PLL2 */
ldr r1, =0x013B9145
str r1, [r0, #CLKCTL_CBCDR]
ldr r1, =0x0000E3C0
str r1, [r0, #CLKCTL_CBCMR]
mov r3, #DP_OP_216
mov r4, #DP_MFD_216
mov r5, #DP_MFN_216
setup_pll PLL3_BASE_ADDR
/* Set the platform clock dividers */
ldr r2, =ARM_BASE_ADDR
ldr r1, =0x00000725
str r1, [r2, #0x14]
/* Switch ARM back to PLL 1 */
mov r1, #0
str r1, [r0, #CLKCTL_CCSR]
str r1, [r0, #CLKCTL_CACRR]
/* Use lp_apm (24MHz) source for perclk */
mov r2, #0x48
ldr r2, [r0]
cmp r2, #0x10
ldrhs r1, =0x000020C2
ldrlo r1, =0x0000E3C2
str r1, [r0, #CLKCTL_CBCMR]
/* TO1.x emi = ahb, all perclk dividers are 1 since using 24MHz */
/* TO2.x ddr from PLL1, all perclk dividers are 1 since using 24MHz */
ldrhs r1, =0x59239100
ldrlo r1, =0x013D9100
strlo r1, [r0, #CLKCTL_CBCDR]
/* use PLL2 for UART source, get 66.5MHz */
ldr r1, =0xA5A2A020
str r1, [r0, #CLKCTL_CSCMR1]
ldr r1, =0x00C30321
str r1, [r0, #CLKCTL_CSCDR1]
/* make sure divider effective */
1: ldr r1, [r0, #CLKCTL_CDHIPR]
cmp r1, #0
bne 1b
mov r1, #0x0
str r1, [r0, #CLKCTL_CCDR]
.endm
.macro setup_wdog
ldr r0, =WDOG1_BASE_ADDR
mov r1, #0x30
strh r1, [r0]
.endm
.macro setup_sdram
ldr r0, =ESDCTL_BASE_ADDR
mov r2, #0x48
ldr r2, [r2]
cmp r2, #0x10
bhs 1f
/* Set CSD0 */
mov r1, #0x80000000
str r1, [r0, #ESDCTL_ESDCTL0]
/* Precharge command */
ldr r1, DDR_PERCHARGE_CMD
str r1, [r0, #ESDCTL_ESDSCR]
/* 2 refresh commands */
ldr r1, DDR_REFRESH_CMD
str r1, [r0, #ESDCTL_ESDSCR]
str r1, [r0, #ESDCTL_ESDSCR]
/* LMR with CAS=3 and BL=3 */
ldr r1, DDR_LMR1_W
str r1, [r0, #ESDCTL_ESDSCR]
/* 13 ROW, 10 COL, 32Bit, SREF=4 Micron Model */
ldr r1, DDR_LMR_CMD
str r1, [r0, #ESDCTL_ESDCTL0]
/* Timing parameters */
ldr r1, DDR_TIMING_W
str r1, [r0, #ESDCTL_ESDCFG0]
/* MDDR enable, RLAT=2 */
ldr r1, DDR_MISC_W
str r1, [r0, #ESDCTL_ESDMISC]
/* Normal mode */
mov r1, #0x00000000
str r1, [r0, #ESDCTL_ESDSCR]
1:
.endm /* setup_sdram */
.section ".text.init", "x"
.globl lowlevel_init
lowlevel_init:
/* Platform CHIP level init*/
#ifdef TURN_OFF_IMPRECISE_ABORT
mrs r0, cpsr
bic r0, r0, #0x100
msr cpsr, r0
#endif
mrc 15, 0, r1, c1, c0, 0
#ifndef BRANCH_PREDICTION_ENABLE
mrc 15, 0, r0, c1, c0, 1
bic r0, r0, #7
mcr 15, 0, r0, c1, c0, 1
#else
mrc 15, 0, r0, c1, c0, 1
orr r0, r0, #7
mcr 15, 0, r0, c1, c0, 1
orr r1, r1, #(1<<11)
#endif
#ifdef UNALIGNED_ACCESS_ENABLE
orr r1, r1, #(1<<22)
#endif
#ifdef LOW_INT_LATENCY_ENABLE
orr r1, r1, #(1<<21)
#endif
mcr 15, 0, r1, c1, c0, 0
mov r0, #0
#ifdef BRANCH_PREDICTION_ENABLE
mcr 15, 0, r0, c15, c2, 4
#endif
mcr 15, 0, r0, c7, c10, 4 /* Drain the write buffer */
init_l2cc
init_aips
setup_wdog
init_max
init_m4if
init_drive_strength
cmp pc, #PHYS_SDRAM_1
blo do_sdram_setup
cmp pc, #(PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE)
blo init_clock_start
do_sdram_setup:
setup_sdram
init_clock_start:
init_clock
init_debug_board
/*init_sdram*/
/* return from mxc_nand_load */
/* r12 saved upper lr*/
b mxc_nand_load
/* Board level setting value */
DDR_PERCHARGE_CMD: .word 0x04008008
DDR_REFRESH_CMD: .word 0x00008010
DDR_LMR1_W: .word 0x00338018
DDR_LMR_CMD: .word 0xB2220000
DDR_TIMING_W: .word 0xB02567A9
DDR_MISC_W: .word 0x000A0104
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