diff options
Diffstat (limited to 'onenand_ipl/board/apollon/low_levelinit.S')
| -rw-r--r-- | onenand_ipl/board/apollon/low_levelinit.S | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/onenand_ipl/board/apollon/low_levelinit.S b/onenand_ipl/board/apollon/low_levelinit.S new file mode 100644 index 0000000..417a5a7 --- /dev/null +++ b/onenand_ipl/board/apollon/low_levelinit.S @@ -0,0 +1,205 @@ +/* + * Board specific setup info + * + * (C) Copyright 2005-2008 Samsung Electronics + * Kyungmin Park <kyungmin.park@samsung.com> + * + * Derived from board/omap2420h4/platform.S + * + * 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 <config.h> +#include <asm/arch/omap2420.h> +#include <asm/arch/mem.h> +#include <asm/arch/clocks.h> + +#define APOLLON_CS0_BASE 0x00000000 + +#ifdef PRCM_CONFIG_I +#define SDRC_ACTIM_CTRLA_0_VAL 0x7BA35907 +#define SDRC_ACTIM_CTRLB_0_VAL 0x00000013 +#define SDRC_RFR_CTRL_0_VAL 0x00044C01 + +/* GPMC */ +#define APOLLON_GPMC_CONFIG1_0 0xe30d1201 +#define APOLLON_GPMC_CONFIG2_0 0x000c1000 +#define APOLLON_GPMC_CONFIG3_0 0x00030400 +#define APOLLON_GPMC_CONFIG4_0 0x0B841006 +#define APOLLON_GPMC_CONFIG5_0 0x020F0C11 +#define APOLLON_GPMC_CONFIG6_0 0x00000000 +#define APOLLON_GPMC_CONFIG7_0 (0x00000e40 | (APOLLON_CS0_BASE >> 24)) + +#elif defined(PRCM_CONFIG_II) +#define SDRC_ACTIM_CTRLA_0_VAL 0x4A59B485 +#define SDRC_ACTIM_CTRLB_0_VAL 0x0000000C +#define SDRC_RFR_CTRL_0_VAL 0x00030001 + +/* GPMC */ +#define APOLLON_GPMC_CONFIG1_0 0xe30d1201 +#define APOLLON_GPMC_CONFIG2_0 0x00080E81 +#define APOLLON_GPMC_CONFIG3_0 0x00030400 +#define APOLLON_GPMC_CONFIG4_0 0x08041586 +#define APOLLON_GPMC_CONFIG5_0 0x020C090E +#define APOLLON_GPMC_CONFIG6_0 0x00000000 +#define APOLLON_GPMC_CONFIG7_0 (0x00000e40 | (APOLLON_CS0_BASE >> 24)) + +#else +#error "Please configure PRCM schecm" +#endif + +_TEXT_BASE: + .word TEXT_BASE /* sdram load addr from config.mk */ + +.globl lowlevel_init +lowlevel_init: + mov r3, r0 /* save skip information */ + + /* Disable watchdog */ + ldr r0, =WD2_BASE + ldr r1, =WD_UNLOCK1 + str r1, [r0, #WSPR] + + ldr r1, =WD_UNLOCK2 + str r1, [r0, #WSPR] + +#ifdef DEBUG_LED + /* LED0 OFF */ + ldr r0, =0x480000E5 /* ball AA10, mode 3 */ + mov r1, #0x0b + strb r1, [r0] +#endif + + /* Pin muxing for SDRC */ + mov r1, #0x00 + ldr r0, =0x480000A1 /* ball C12, mode 0 */ + strb r1, [r0] + + ldr r0, =0x48000032 /* ball D11, mode 0 */ + strb r1, [r0] + + ldr r0, =0x480000A3 /* ball B13, mode 0 */ + strb r1, [r0] + + /* SDRC setting */ + ldr r0, =OMAP2420_SDRC_BASE + ldr r1, =0x00000010 + str r1, [r0, #0x10] + + ldr r1, =0x00000100 + str r1, [r0, #0x44] + + /* SDRC CS0 configuration */ +#ifdef CONFIG_APOLLON_PLUS + ldr r1, =0x01702011 +#else + ldr r1, =0x00d04011 +#endif + str r1, [r0, #0x80] + + ldr r1, =SDRC_ACTIM_CTRLA_0_VAL + str r1, [r0, #0x9C] + + ldr r1, =SDRC_ACTIM_CTRLB_0_VAL + str r1, [r0, #0xA0] + + ldr r1, =SDRC_RFR_CTRL_0_VAL + str r1, [r0, #0xA4] + + ldr r1, =0x00000041 + str r1, [r0, #0x70] + + /* Manual command sequence */ + ldr r1, =0x00000007 + str r1, [r0, #0xA8] + + ldr r1, =0x00000000 + str r1, [r0, #0xA8] + + ldr r1, =0x00000001 + str r1, [r0, #0xA8] + + ldr r1, =0x00000002 + str r1, [r0, #0xA8] + str r1, [r0, #0xA8] + + /* + * CS0 SDRC Mode register + * Burst length = 4 - DDR memory + * Serial mode + * CAS latency = 3 + */ + ldr r1, =0x00000032 + str r1, [r0, #0x84] + + /* Note: You MUST set EMR values */ + /* EMR1 & EMR2 */ + ldr r1, =0x00000000 + str r1, [r0, #0x88] + str r1, [r0, #0x8C] + +#ifdef OLD_SDRC_DLLA_CTRL + /* SDRC_DLLA_CTRL */ + ldr r1, =0x00007306 + str r1, [r0, #0x60] + + ldr r1, =0x00007303 + str r1, [r0, #0x60] +#else + /* SDRC_DLLA_CTRL */ + ldr r1, =0x00000506 + str r1, [r0, #0x60] + + ldr r1, =0x00000503 + str r1, [r0, #0x60] +#endif + +#ifdef __BROKEN_FEATURE__ + /* SDRC_DLLB_CTRL */ + ldr r1, =0x00000506 + str r1, [r0, #0x68] + + ldr r1, =0x00000503 + str r1, [r0, #0x68] +#endif + + /* little delay after init */ + mov r2, #0x1800 +1: + subs r2, r2, #0x1 + bne 1b + + ldr sp, SRAM_STACK + str ip, [sp] /* stash old link register */ + mov ip, lr /* save link reg across call */ + mov r0, r3 /* pass skip info to s_init */ + + bl s_init /* go setup pll,mux,memory */ + + ldr ip, [sp] /* restore save ip */ + mov lr, ip /* restore link reg */ + + /* back to arch calling code */ + mov pc, lr + + /* the literal pools origin */ + .ltorg + +SRAM_STACK: + .word LOW_LEVEL_SRAM_STACK |