/*
* Board specific setup info
*
*
* 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 <asm/arch/hardware.h>
#define SDRAM 0x20000000 /* address of the SDRAM */
/* values */
/* clocks */
#define MOR_VAL 0x00002001 /* CKGR_MOR - enable main osc. */
#define PLLAR_VAL (0x2000BF00 | ((MASTER_PLL_MUL - 1)<< 16) | (MASTER_PLL_DIV))
/* #define PLLAR_VAL 0x200CBF01 */ /* 239.616000 MHz for PCK */
#define PLLBR_VAL 0x10483E0E /* 48.054857 MHz for USB) */
#define MCKR1_VAL 0x00000100 /* PCK/2 = MCK Master Clock from PLLA*/
#define MCKR2_VAL 0x00000102 /* PCK/2 = MCK Master Clock from PLLA*/
#define WDTC_WDMR_VAL 0x3fff8fff /* disable watchdog */
#define PIOD_PDR_VAL1 0xFFFF0000 /* define PDC[31:16] as DATA[31:16] */
#define PIOD_PPUDR_VAL 0xFFFF0000 /* no pull-up for D[31:16] */
#define MATRIX_EBI0CSA_VAL 0x0001010A /* EBI0_CSA, CS1 SDRAM, CS3 NAND Flash, 3.3V memories */
/*#define MATRIX_EBI1CSA_VAL 0x00000000 /* EBI1_CSA, 1.8V memory*/
#define MATRIX_EBI1CSA_VAL 0x00010100 /* EBI1_CSA, 3.3v, no pull-ups*/
/* SDRAM */
#define SDRC_MR_VAL1 0 /* SDRAMC_MR Mode register */
#define SDRC_TR_VAL1 0x13C /* SDRAMC_TR - Refresh Timer register*/
/*#define SDRC_CR_VAL 0x85237279*/ /* SDRAMC_CR - Configuration register*/
/*#define SDRC_CR_VAL 0x85227259 CL2 */
#define SDRC_CR_VAL 0x85227279 /*CL3*/
#define SDRC_MDR_VAL 0 /* Memory Device Register -> SDRAM */
#define SDRC_MR_VAL2 0x00000002 /* SDRAMC_MR */
#define SDRAM_VAL1 0 /* SDRAM_BASE */
#define SDRC_MR_VAL3 4 /* SDRC_MR */
#define SDRAM_VAL2 0 /* SDRAM_BASE */
#define SDRAM_VAL3 0 /* SDRAM_BASE */
#define SDRAM_VAL4 0 /* SDRAM_BASE */
#define SDRAM_VAL5 0 /* SDRAM_BASE */
#define SDRAM_VAL6 0 /* SDRAM_BASE */
#define SDRAM_VAL7 0 /* SDRAM_BASE */
#define SDRAM_VAL8 0 /* SDRAM_BASE */
#define SDRAM_VAL9 0 /* SDRAM_BASE */
#define SDRC_MR_VAL4 3 /* SDRC_MR */
#define SDRAM_VAL10 0 /* SDRAM_BASE */
#define SDRC_MR_VAL5 0 /* SDRC_MR */
#define SDRAM_VAL11 0 /* SDRAM_BASE */
#define SDRC_TR_VAL2 1200 /* SDRAM_TR */
#define SDRAM_VAL12 0 /* SDRAM_BASE */
/* setup CS0 (NOR Flash) - 16-bit, 15 WS */
#define SMC0_SETUP0_VAL 0x0A0A0A0A /* SMC_SETUP */
#define SMC0_PULSE0_VAL 0x0B0B0B0B /* SMC_PULSE */
#define SMC0_CYCLE0_VAL 0x00160016 /* SMC_CYCLE */
#define SMC0_CTRL0_VAL 0x00161003 /* SMC_MODE */
#define RSTC_RMR_VAL 0xA5000301 /* user reset enable */
#define MASTER_PLL_MUL 162
#define MASTER_PLL_DIV 15
_TEXT_BASE:
.word TEXT_BASE
.globl board_init_lowlevel
board_init_lowlevel:
mov r5, pc // r5 = POS1 + 4 current
POS1:
ldr r0, =POS1 // r0 = POS1 compile
ldr r2, _TEXT_BASE
sub r0, r0, r2 // r0 = POS1-_TEXT_BASE (POS1 relative)
sub r5, r5, r0 // r0 = TEXT_BASE-1
sub r5, r5, #4 // r1 = text base - current
/* memory control configuration 1 */
ldr r0, =SMRDATA
ldr r2, =SMRDATA1
ldr r1, _TEXT_BASE
sub r0, r0, r1
sub r2, r2, r1
add r0, r0, r5
add r2, r2, r5
0:
/* the address */
ldr r1, [r0], #4
/* the value */
ldr r3, [r0], #4
str r3, [r1]
cmp r2, r0
bne 0b
/*-----------------------------------------------------------------------------
;PMC Init Step 1.
;------------------------------------------------------------------------------
;- Enable the Main Oscillator
;----------------------------------------------------------------------------*/
/* Test if main oscillator is enabled */
ldr r0,=AT91C_PMC_SR
ldr r1, [r0]
ldr r2,=AT91C_PMC_MOSCS
ands r1, r1, r2
ldr r1, =AT91C_CKGR_MOR
/* Main oscillator Enable register PMC_MOR: */
/* Enable main oscillator, OSCOUNT = 0xFF */
ldr r0, =0x0000FF01
str r0, [r1]
/* Reading the PMC Status register to detect when the */
/* Main Oscillator is enabled */
mov r4, #AT91C_PMC_MOSCS
ldr r0,=AT91C_PMC_SR
MOSCS_Loop:
ldr r3, [r0]
and r3, r4, r3
cmp r3, #AT91C_PMC_MOSCS
bne MOSCS_Loop
/*-----------------------------------------------------------------------------
;PMC Init Step 2.
;------------------------------------------------------------------------------
;- Setup PLLA
;----------------------------------------------------------------------------*/
ldr r1, =AT91C_CKGR_PLLAR
/* (18.432 MHz / 1) * 13 = 239 MHz */
ldr r0, =PLLAR_VAL
str r0, [r1]
/* Reading the PMC Status register to detect */
/* when the PLLA is locked */
mov r4, #AT91C_PMC_LOCKA
ldr r0,=AT91C_PMC_SR
MOSCS_Loop1:
ldr r3, [r0]
and r3, r4, r3
cmp r3, #AT91C_PMC_LOCKA
bne MOSCS_Loop1
/*-----------------------------------------------------------------------------
;PMC Init Step 3.
;------------------------------------------------------------------------------
;- Switch on the Main Oscillator 18.432 MHz
;----------------------------------------------------------------------------*/
Init_MCKR:
/* -Master Clock Controller register PMC_MCKR */
ldr r0, =0x100
ldr r1, =AT91C_PMC_MCKR
str r0, [r1]
/* Reading the PMC Status register to detect */
/* when the Master clock is ready */
mov r4, #AT91C_PMC_MCKRDY
MCKRDY_Loop:
ldr r1, =AT91C_PMC_SR
ldr r3, [r1]
and r3, r4, r3
cmp r3, #AT91C_PMC_MCKRDY
bne MCKRDY_Loop
ldr r0, =0x102
ldr r1, =AT91C_PMC_MCKR
str r0, [r1]
/* Reading the PMC Status register to detect */
/* when the Master clock is ready */
mov r4, #AT91C_PMC_MCKRDY
MCKRDY_Loop1:
ldr r1, =AT91C_PMC_SR
ldr r3, [r1]
and r3, r4, r3
cmp r3, #AT91C_PMC_MCKRDY
bne MCKRDY_Loop1
/*-----------------------------------------------------------------------------
;PMC Init Step 4.
;------------------------------------------------------------------------------
;- Setup PLLB
;----------------------------------------------------------------------------*/
ldr r1, = AT91C_PMC_PLLBR
/* 48.054857 MHz = 18432000 * 72 / 14 / 2 for USB) */
ldr r0, =PLLBR_VAL
str r0, [r1]
/* Reading the PMC Status register to detect */
/* when the PLLB is locked */
mov r4, #AT91C_PMC_LOCKB
MOSCS_Loop2:
ldr r1, = AT91C_PMC_SR
ldr r3, [r1]
and r3, r4, r3
cmp r3, #AT91C_PMC_LOCKB
bne MOSCS_Loop2
/* memory control configuration 2 */
ldr r0, =SMRDATA1
ldr r2, =SMRDATA2
ldr r1, _TEXT_BASE
sub r0, r0, r1
sub r2, r2, r1
add r0, r0, r5
add r2, r2, r5
2:
/* the address */
ldr r1, [r0], #4
/* the value */
ldr r3, [r0], #4
str r3, [r1]
cmp r2, r0
bne 2b
/* everything is fine now */
mov pc, lr
.ltorg
SMRDATA:
.word AT91C_WDTC_WDMR
.word WDTC_WDMR_VAL
.word AT91C_PIOD_PDR
.word PIOD_PDR_VAL1
.word AT91C_PIOD_PPUDR
.word PIOD_PPUDR_VAL
.word AT91C_PIOD_ASR
.word PIOD_PPUDR_VAL
.word AT91C_CCFG_EBI0CSA
.word MATRIX_EBI0CSA_VAL
.word AT91C_CCFG_EBI1CSA
.word MATRIX_EBI1CSA_VAL
/* flash */
.word AT91C_SMC0_CTRL0
.word SMC0_CTRL0_VAL
.word AT91C_SMC0_CYCLE0
.word SMC0_CYCLE0_VAL
.word AT91C_SMC0_PULSE0
.word SMC0_PULSE0_VAL
.word AT91C_SMC0_SETUP0
.word SMC0_SETUP0_VAL
SMRDATA1:
.word AT91C_SDRAMC0_MR
.word SDRC_MR_VAL1
.word AT91C_SDRAMC0_TR
.word SDRC_TR_VAL1
.word AT91C_SDRAMC0_CR
.word SDRC_CR_VAL
.word AT91C_SDRAMC0_MDR
.word SDRC_MDR_VAL
.word AT91C_SDRAMC0_MR
.word SDRC_MR_VAL2
.word SDRAM
.word SDRAM_VAL1
.word AT91C_SDRAMC0_MR
.word SDRC_MR_VAL3
.word SDRAM
.word SDRAM_VAL2
.word SDRAM
.word SDRAM_VAL3
.word SDRAM
.word SDRAM_VAL4
.word SDRAM
.word SDRAM_VAL5
.word SDRAM
.word SDRAM_VAL6
.word SDRAM
.word SDRAM_VAL7
.word SDRAM
.word SDRAM_VAL8
.word SDRAM
.word SDRAM_VAL9
.word AT91C_SDRAMC0_MR
.word SDRC_MR_VAL4
.word SDRAM
.word SDRAM_VAL10
.word AT91C_SDRAMC0_MR
.word SDRC_MR_VAL5
.word SDRAM
.word SDRAM_VAL11
.word AT91C_SDRAMC0_TR
.word SDRC_TR_VAL2
.word SDRAM
.word SDRAM_VAL12
/* User reset enable*/
.word AT91C_RSTC_RMR
.word RSTC_RMR_VAL
/* MATRIX_MCFG - REMAP all masters */
SMRDATA2:
.word 0
