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Diffstat (limited to 'board/apollon/lowlevel_init.S')
| -rw-r--r-- | board/apollon/lowlevel_init.S | 337 |
1 files changed, 337 insertions, 0 deletions
diff --git a/board/apollon/lowlevel_init.S b/board/apollon/lowlevel_init.S new file mode 100644 index 0000000..7676259 --- /dev/null +++ b/board/apollon/lowlevel_init.S @@ -0,0 +1,337 @@ +/* + * Board specific setup info + * + * (C) Copyright 2005-2007 + * Samsung Electronics, + * Kyungmin Park <kyungmin.park@samsung.com> + * + * 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 <version.h> +#include <asm/arch/omap2420.h> +#include <asm/arch/mem.h> +#include <asm/arch/clocks.h> +#include "mem.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 +#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 +#endif + +#define SDRAM_BASE_ADDRESS 0x80008000 + +_TEXT_BASE: + .word TEXT_BASE /* sdram load addr from config.mk */ + +.globl lowlevel_init +lowlevel_init: + +#ifdef CFG_NOR_BOOT + /* Check running in SDRAM */ + mov r0, pc, lsr #28 + cmp r0, #8 + beq prcm_setup + +flash_setup: + /* In Flash */ + ldr r0, =WD2_BASE + ldr r1, =WD_UNLOCK1 + str r1, [r0, #WSPR] + + ldr r1, =WD_UNLOCK2 + str r1, [r0, #WSPR] + + /* 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 */ + ldr r1, =0x00d04011 + 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 + + /* Setup base address */ + ldr r0, =0x00000000 /* NOR address */ + ldr r1, =SDRAM_BASE_ADDRESS /* SDRAM address */ + ldr r2, =0x20000 /* Size: 128KB */ + +copy_loop: + ldmia r0!, {r3-r10} + stmia r1!, {r3-r10} + cmp r0, r2 + ble copy_loop + + ldr r1, =SDRAM_BASE_ADDRESS + mov lr, pc + mov pc, r1 +#endif + +prcm_setup: + ldr r0, =OMAP2420_CM_BASE + ldr r1, [r0, #0x544] /* CLKSEL2_PLL */ + bic r1, r1, #0x03 + orr r1, r1, #0x02 + str r1, [r0, #0x544] + + ldr r1, [r0, #0x500] + bic r1, r1, #0x03 + orr r1, r1, #0x01 + str r1, [r0, #0x500] + + ldr r1, [r0, #0x140] + bic r1, r1, #0x1f + orr r1, r1, #0x02 + str r1, [r0, #0x140] + +#ifdef PRCM_CONFIG_I + ldr r1, =0x000003C3 +#else + ldr r1, =0x00000343 +#endif + str r1, [r0, #0x840] + + ldr r1, =0x00000002 + str r1, [r0, #0x340] + + ldr r1, =CM_CLKSEL1_CORE +#ifdef PRCM_CONFIG_I + ldr r2, =0x08300C44 +#else + ldr r2, =0x04600C26 +#endif + str r2, [r1] + + ldr r0, =OMAP2420_CM_BASE + ldr r1, [r0, #0x084] + and r1, r1, #0x01 + cmp r1, #0x01 + bne clkvalid + + b . + +clkvalid: + mov r1, #0x01 + str r1, [r0, #0x080] + +waitvalid: + ldr r1, [r0, #0x084] + and r1, r1, #0x01 + cmp r1, #0x00 + bne waitvalid + + ldr r0, =CM_CLKSEL1_PLL +#ifdef PRCM_CONFIG_I + ldr r1, =0x01837100 +#else + ldr r1, =0x01832100 +#endif + str r1, [r0] + + ldr r0, =PRCM_CLKCFG_CTRL + mov r1, #0x01 + str r1, [r0] + mov r6, #0x50 +loop1: + subs r6, r6, #0x01 + cmp r6, #0x01 + bne loop1 + + ldr r0, =CM_CLKEN_PLL + mov r1, #0x0f + str r1, [r0] + + mov r6, #0x100 +loop2: + subs r6, r6, #0x01 + cmp r6, #0x01 + bne loop2 + + ldr r0, =0x48008200 + ldr r1, =0xbfffffff + str r1, [r0] + + ldr r0, =0x48008210 + ldr r1, =0xfffffff9 + str r1, [r0] + + ldr r0, =0x4806a004 + ldr r1, =0x00 + strb r1, [r0] + + ldr r0, =0x4806a020 + ldr r1, =0x07 + strb r1, [r0] + + ldr r0, =0x4806a00c + ldr r1, =0x83 + strb r1, [r0] + + ldr r0, =0x4806a000 + ldr r1, =0x1a + strb r1, [r0] + + ldr r0, =0x4806a004 + ldr r1, =0x00 + strb r1, [r0] + + ldr r0, =0x4806a00c + ldr r1, =0x03 + strb r1, [r0] + + ldr r0, =0x4806a010 + ldr r1, =0x03 + strb r1, [r0] + + ldr r0, =0x4806a008 + ldr r1, =0x04 + strb r1, [r0] + + ldr r0, =0x4806a020 + ldr r1, =0x00 + strb r1, [r0] + +#if 0 + ldr r0, =0x4806a000 + mov r1, #'u' + strb r1, [r0] +#endif + +#if 0 + /* LED0 OFF */ + ldr r3, =0x480000E5 + mov r4, #0x0b + strb r4, [r3] +#endif + + ldr sp, SRAM_STACK + str ip, [sp] /* stash old link register */ + mov ip, lr /* save link reg across call */ + bl s_init /* go setup pll,mux,memory */ + ldr ip, [sp] /* restore save ip */ + mov lr, ip /* restore link reg */ + + /* map interrupt controller */ + ldr r0, VAL_INTH_SETUP + mcr p15, 0, r0, c15, c2, 4 + + /* back to arch calling code */ + mov pc, lr + + /* the literal pools origin */ + .ltorg + +VAL_INTH_SETUP: + .word PERIFERAL_PORT_BASE +SRAM_STACK: + .word LOW_LEVEL_SRAM_STACK |