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openwrt/package/uboot-lantiq/files/board/infineon/easy50812/lowlevel_init.S

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ArmAsm
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/*
* Memory sub-system initialization code for AR9 board.
*
* Copyright (c) 2003 Wolfgang Denk <wd@denx.de>
* Copyright (c) 2005 Andre Messerschmidt Infineon
*
* 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
*/
/* History:
peng liu May 25, 2006, for PLL setting after reset, 05252006
*/
#include <config.h>
#include <version.h>
#include <asm/regdef.h>
#if defined(CONFIG_USE_DDR_RAM)
#if defined(CONFIG_CPU_111M_RAM_111M) || defined(CONFIG_CPU_333M_RAM_111M)
# include "ar9_ddr111_settings.h"
#elif defined(CONFIG_CPU_166M_RAM_166M) || defined(CONFIG_CPU_333M_RAM_166M) || defined(CONFIG_CPU_500M_RAM_166M)
# include "ar9_ddr166_settings.h"
#elif defined(CONFIG_CPU_442M_RAM_147M)
# include "ar9_ddr166_settings.h"
#elif defined(CONFIG_CPU_393M_RAM_196M)
# ifdef CONFIG_ETRON_RAM
# include "etron_ddr196_settings.h"
# else
# include "ar9_ddr196_settings.h"
# endif
#elif defined(CONFIG_CPU_442M_RAM_221M)
# include "ar9_ddr221_settings.h"
#elif defined(CONFIG_CPU_500M_RAM_250M)
# include "ar9_ddr250_settings.h"
#else
# warning "missing definition for ddr_settings.h, use default!"
# include "ar9_ddr_settings.h"
#endif
#endif /* CONFIG_USE_DDR_RAM */
#if defined(CONFIG_USE_DDR_RAM) && !defined(MC_DC0_VALUE)
#error "missing include of ddr_settings.h"
#endif
#define EBU_MODUL_BASE 0xBE105300
#define EBU_CLC(value) 0x0000(value)
#define EBU_CON(value) 0x0010(value)
#define EBU_ADDSEL0(value) 0x0020(value)
#define EBU_ADDSEL1(value) 0x0024(value)
#define EBU_ADDSEL2(value) 0x0028(value)
#define EBU_ADDSEL3(value) 0x002C(value)
#define EBU_BUSCON0(value) 0x0060(value)
#define EBU_BUSCON1(value) 0x0064(value)
#define EBU_BUSCON2(value) 0x0068(value)
#define EBU_BUSCON3(value) 0x006C(value)
#define MC_MODUL_BASE 0xBF800000
#define MC_ERRCAUSE(value) 0x0010(value)
#define MC_ERRADDR(value) 0x0020(value)
#define MC_CON(value) 0x0060(value)
#define MC_SRAM_ENABLE 0x00000004
#define MC_SDRAM_ENABLE 0x00000002
#define MC_DDRRAM_ENABLE 0x00000001
#define MC_SDR_MODUL_BASE 0xBF800200
#define MC_IOGP(value) 0x0000(value)
#define MC_CTRLENA(value) 0x0010(value)
#define MC_MRSCODE(value) 0x0020(value)
#define MC_CFGDW(value) 0x0030(value)
#define MC_CFGPB0(value) 0x0040(value)
#define MC_LATENCY(value) 0x0080(value)
#define MC_TREFRESH(value) 0x0090(value)
#define MC_SELFRFSH(value) 0x00A0(value)
#define MC_DDR_MODUL_BASE 0xBF801000
#define MC_DC00(value) 0x0000(value)
#define MC_DC01(value) 0x0010(value)
#define MC_DC02(value) 0x0020(value)
#define MC_DC03(value) 0x0030(value)
#define MC_DC04(value) 0x0040(value)
#define MC_DC05(value) 0x0050(value)
#define MC_DC06(value) 0x0060(value)
#define MC_DC07(value) 0x0070(value)
#define MC_DC08(value) 0x0080(value)
#define MC_DC09(value) 0x0090(value)
#define MC_DC10(value) 0x00A0(value)
#define MC_DC11(value) 0x00B0(value)
#define MC_DC12(value) 0x00C0(value)
#define MC_DC13(value) 0x00D0(value)
#define MC_DC14(value) 0x00E0(value)
#define MC_DC15(value) 0x00F0(value)
#define MC_DC16(value) 0x0100(value)
#define MC_DC17(value) 0x0110(value)
#define MC_DC18(value) 0x0120(value)
#define MC_DC19(value) 0x0130(value)
#define MC_DC20(value) 0x0140(value)
#define MC_DC21(value) 0x0150(value)
#define MC_DC22(value) 0x0160(value)
#define MC_DC23(value) 0x0170(value)
#define MC_DC24(value) 0x0180(value)
#define MC_DC25(value) 0x0190(value)
#define MC_DC26(value) 0x01A0(value)
#define MC_DC27(value) 0x01B0(value)
#define MC_DC28(value) 0x01C0(value)
#define MC_DC29(value) 0x01D0(value)
#define MC_DC30(value) 0x01E0(value)
#define MC_DC31(value) 0x01F0(value)
#define MC_DC32(value) 0x0200(value)
#define MC_DC33(value) 0x0210(value)
#define MC_DC34(value) 0x0220(value)
#define MC_DC35(value) 0x0230(value)
#define MC_DC36(value) 0x0240(value)
#define MC_DC37(value) 0x0250(value)
#define MC_DC38(value) 0x0260(value)
#define MC_DC39(value) 0x0270(value)
#define MC_DC40(value) 0x0280(value)
#define MC_DC41(value) 0x0290(value)
#define MC_DC42(value) 0x02A0(value)
#define MC_DC43(value) 0x02B0(value)
#define MC_DC44(value) 0x02C0(value)
#define MC_DC45(value) 0x02D0(value)
#define MC_DC46(value) 0x02E0(value)
#define RCU_OFFSET 0xBF203000
#define RCU_RST_REQ (RCU_OFFSET + 0x0010)
#define RCU_STS (RCU_OFFSET + 0x0014)
#define CGU_OFFSET 0xBF103000
#define PLL0_CFG (CGU_OFFSET + 0x0004)
#define PLL1_CFG (CGU_OFFSET + 0x0008)
#define PLL2_CFG (CGU_OFFSET + 0x000C)
#define CGU_SYS (CGU_OFFSET + 0x0010)
#define CGU_UPDATE (CGU_OFFSET + 0x0014)
#define IF_CLK (CGU_OFFSET + 0x0018)
#define CGU_SMD (CGU_OFFSET + 0x0020)
#define CGU_CT1SR (CGU_OFFSET + 0x0028)
#define CGU_CT2SR (CGU_OFFSET + 0x002C)
#define CGU_PCMCR (CGU_OFFSET + 0x0030)
#define PCI_CR_PCI (CGU_OFFSET + 0x0034)
#define CGU_OSC_CTRL (CGU_OFFSET + 0x001C)
#define CGU_MIPS_PWR_DWN (CGU_OFFSET + 0x0038)
#define CLK_MEASURE (CGU_OFFSET + 0x003C)
#define pll1_36MHz_CONFIG 0x9800f25f
.set noreorder
/*
* void ebu_init(void)
*/
.globl ebu_init
.ent ebu_init
ebu_init:
#if defined(CONFIG_EBU_ADDSEL0) || defined(CONFIG_EBU_ADDSEL1) || \
defined(CONFIG_EBU_ADDSEL2) || defined(CONFIG_EBU_ADDSEL3) || \
defined(CONFIG_EBU_BUSCON0) || defined(CONFIG_EBU_BUSCON1) || \
defined(CONFIG_EBU_BUSCON2) || defined(CONFIG_EBU_BUSCON3)
li t1, EBU_MODUL_BASE
#if defined(CONFIG_EBU_ADDSEL0)
li t2, CONFIG_EBU_ADDSEL0
sw t2, EBU_ADDSEL0(t1)
#endif
#if defined(CONFIG_EBU_ADDSEL1)
li t2, CONFIG_EBU_ADDSEL1
sw t2, EBU_ADDSEL1(t1)
#endif
#if defined(CONFIG_EBU_ADDSEL2)
li t2, CONFIG_EBU_ADDSEL2
sw t2, EBU_ADDSEL2(t1)
#endif
#if defined(CONFIG_EBU_ADDSEL3)
li t2, CONFIG_EBU_ADDSEL3
sw t2, EBU_ADDSEL3(t1)
#endif
#if defined(CONFIG_EBU_BUSCON0)
li t2, CONFIG_EBU_BUSCON0
sw t2, EBU_BUSCON0(t1)
#endif
#if defined(CONFIG_EBU_BUSCON1)
li t2, CONFIG_EBU_BUSCON1
sw t2, EBU_BUSCON1(t1)
#endif
#if defined(CONFIG_EBU_BUSCON2)
li t2, CONFIG_EBU_BUSCON2
sw t2, EBU_BUSCON2(t1)
#endif
#if defined(CONFIG_EBU_BUSCON3)
li t2, CONFIG_EBU_BUSCON3
sw t2, EBU_BUSCON3(t1)
#endif
#endif
j ra
nop
.end ebu_init
/*
* void cgu_init(long)
*
* a0 has the clock value
*/
.globl cgu_init
.ent cgu_init
cgu_init:
li t2, CGU_SYS
lw t2,0(t2)
beq t2,a0,freq_up2date
nop
li t1, CGU_SYS
sw a0,0(t1)
#if defined(CONFIG_CPU_333M_RAM_166M) && defined(CONFIG_USE_PLL1)
li t1, PLL1_CFG
li a1, pll1_36MHz_CONFIG
sw a1, 0(t1)
#endif
#if defined(CONFIG_CLASS_II_DDR_PAD)
li t1, CGU_SMD
li a1, 0x200000
sw a1, 0(t1) // Turn on DDR PAD Class II to INC drive.
#endif
li t1, RCU_RST_REQ
li t2, 0x40000008
sw t2,0(t1)
b wait_reset
nop
wait_reset:
b wait_reset
nop
freq_up2date:
j ra
nop
.end cgu_init
#ifndef CONFIG_USE_DDR_RAM
/*
* void sdram_init(long)
*
* a0 has the clock value
*/
.globl sdram_init
.ent sdram_init
sdram_init:
/* SDRAM Initialization
*/
li t1, MC_MODUL_BASE
/* Clear Error log registers */
sw zero, MC_ERRCAUSE(t1)
sw zero, MC_ERRADDR(t1)
/* Enable SDRAM module in memory controller */
li t3, MC_SDRAM_ENABLE
lw t2, MC_CON(t1)
or t3, t2, t3
sw t3, MC_CON(t1)
li t1, MC_SDR_MODUL_BASE
/* disable the controller */
li t2, 0
sw t2, MC_CTRLENA(t1)
li t2, 0x822
sw t2, MC_IOGP(t1)
li t2, 0x2
sw t2, MC_CFGDW(t1)
/* Set CAS Latency */
li t2, 0x00000020
sw t2, MC_MRSCODE(t1)
/* Set CS0 to SDRAM parameters */
li t2, 0x000014d8
sw t2, MC_CFGPB0(t1)
/* Set SDRAM latency parameters */
li t2, 0x00036325; /* BC PC100 */
sw t2, MC_LATENCY(t1)
/* Set SDRAM refresh rate */
li t2, 0x00000C30
sw t2, MC_TREFRESH(t1)
/* Clear Power-down registers */
sw zero, MC_SELFRFSH(t1)
/* Finally enable the controller */
li t2, 1
sw t2, MC_CTRLENA(t1)
j ra
nop
.end sdram_init
#endif /* !CONFIG_USE_DDR_RAM */
#ifdef CONFIG_USE_DDR_RAM
/*
* void ddrram_init(long)
*
* a0 has the clock value
*/
.globl ddrram_init
.ent ddrram_init
ddrram_init:
/* DDR-DRAM Initialization
*/
li t1, MC_MODUL_BASE
/* Clear Error log registers */
sw zero, MC_ERRCAUSE(t1)
sw zero, MC_ERRADDR(t1)
/* Enable DDR module in memory controller */
li t3, MC_DDRRAM_ENABLE
lw t2, MC_CON(t1)
or t3, t2, t3
sw t3, MC_CON(t1)
li t1, MC_DDR_MODUL_BASE
/* Write configuration to DDR controller registers */
li t2, MC_DC0_VALUE
sw t2, MC_DC00(t1)
li t2, MC_DC1_VALUE
sw t2, MC_DC01(t1)
li t2, MC_DC2_VALUE
sw t2, MC_DC02(t1)
li t2, MC_DC3_VALUE
sw t2, MC_DC03(t1)
li t2, MC_DC4_VALUE
sw t2, MC_DC04(t1)
li t2, MC_DC5_VALUE
sw t2, MC_DC05(t1)
li t2, MC_DC6_VALUE
sw t2, MC_DC06(t1)
li t2, MC_DC7_VALUE
sw t2, MC_DC07(t1)
li t2, MC_DC8_VALUE
sw t2, MC_DC08(t1)
li t2, MC_DC9_VALUE
sw t2, MC_DC09(t1)
li t2, MC_DC10_VALUE
sw t2, MC_DC10(t1)
li t2, MC_DC11_VALUE
sw t2, MC_DC11(t1)
li t2, MC_DC12_VALUE
sw t2, MC_DC12(t1)
li t2, MC_DC13_VALUE
sw t2, MC_DC13(t1)
li t2, MC_DC14_VALUE
sw t2, MC_DC14(t1)
li t2, MC_DC15_VALUE
sw t2, MC_DC15(t1)
li t2, MC_DC16_VALUE
sw t2, MC_DC16(t1)
li t2, MC_DC17_VALUE
sw t2, MC_DC17(t1)
li t2, MC_DC18_VALUE
sw t2, MC_DC18(t1)
li t2, MC_DC19_VALUE
sw t2, MC_DC19(t1)
li t2, MC_DC20_VALUE
sw t2, MC_DC20(t1)
li t2, MC_DC21_VALUE
sw t2, MC_DC21(t1)
li t2, MC_DC22_VALUE
sw t2, MC_DC22(t1)
li t2, MC_DC23_VALUE
sw t2, MC_DC23(t1)
li t2, MC_DC24_VALUE
sw t2, MC_DC24(t1)
li t2, MC_DC25_VALUE
sw t2, MC_DC25(t1)
li t2, MC_DC26_VALUE
sw t2, MC_DC26(t1)
li t2, MC_DC27_VALUE
sw t2, MC_DC27(t1)
li t2, MC_DC28_VALUE
sw t2, MC_DC28(t1)
li t2, MC_DC29_VALUE
sw t2, MC_DC29(t1)
li t2, MC_DC30_VALUE
sw t2, MC_DC30(t1)
li t2, MC_DC31_VALUE
sw t2, MC_DC31(t1)
li t2, MC_DC32_VALUE
sw t2, MC_DC32(t1)
li t2, MC_DC33_VALUE
sw t2, MC_DC33(t1)
li t2, MC_DC34_VALUE
sw t2, MC_DC34(t1)
li t2, MC_DC35_VALUE
sw t2, MC_DC35(t1)
li t2, MC_DC36_VALUE
sw t2, MC_DC36(t1)
li t2, MC_DC37_VALUE
sw t2, MC_DC37(t1)
li t2, MC_DC38_VALUE
sw t2, MC_DC38(t1)
li t2, MC_DC39_VALUE
sw t2, MC_DC39(t1)
li t2, MC_DC40_VALUE
sw t2, MC_DC40(t1)
li t2, MC_DC41_VALUE
sw t2, MC_DC41(t1)
li t2, MC_DC42_VALUE
sw t2, MC_DC42(t1)
li t2, MC_DC43_VALUE
sw t2, MC_DC43(t1)
li t2, MC_DC44_VALUE
sw t2, MC_DC44(t1)
li t2, MC_DC45_VALUE
sw t2, MC_DC45(t1)
li t2, MC_DC46_VALUE
sw t2, MC_DC46(t1)
li t2, 0x00000100
sw t2, MC_DC03(t1)
j ra
nop
.end ddrram_init
#endif /* CONFIG_USE_DDR_RAM */
.globl lowlevel_init
.ent lowlevel_init
lowlevel_init:
/* EBU, CGU and SDRAM/DDR-RAM Initialization.
*/
move t0, ra
/* We rely on the fact that non of the following ..._init() functions
* modify t0
*/
#if defined(CONFIG_SYS_EBU_BOOT)
/*
using PPL1 value
*/
li a0,0x90
bal cgu_init
nop
#endif /* CONFIG_SYS_EBU_BOOT */
bal ebu_init
nop
#ifdef CONFIG_SYS_EBU_BOOT
#ifndef CONFIG_SYS_RAMBOOT
#ifdef CONFIG_USE_DDR_RAM
bal ddrram_init
nop
#else
bal sdram_init
nop
#endif
#endif /* CONFIG_SYS_RAMBOOT */
#endif /* CONFIG_SYS_EBU_BOOT */
move ra, t0
j ra
nop
.end lowlevel_init
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