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https://github.com/AsahiLinux/u-boot
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c0a1dfdec2
Adds new board SMDKC100 that uses s5pc100 SoC Signed-off-by: Minkyu Kang <mk7.kang@samsung.com> Signed-off-by: HeungJun, Kim <riverful.kim@samsung.com>
215 lines
4.5 KiB
ArmAsm
215 lines
4.5 KiB
ArmAsm
/*
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* Copyright (C) 2009 Samsung Electronics
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* Kyungmin Park <kyungmin.park@samsung.com>
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* Minkyu Kang <mk7.kang@samsung.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <config.h>
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#include <version.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/power.h>
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/*
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* Register usages:
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*
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* r5 has zero always
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*/
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_TEXT_BASE:
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.word TEXT_BASE
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.globl lowlevel_init
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lowlevel_init:
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mov r9, lr
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/* r5 has always zero */
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mov r5, #0
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ldr r8, =S5PC100_GPIO_BASE
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/* Disable Watchdog */
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ldr r0, =S5PC100_WATCHDOG_BASE @0xEA200000
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orr r0, r0, #0x0
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str r5, [r0]
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#ifndef CONFIG_ONENAND_IPL
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/* setting SRAM */
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ldr r0, =S5PC100_SROMC_BASE
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ldr r1, =0x9
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str r1, [r0]
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#endif
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/* S5PC100 has 3 groups of interrupt sources */
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ldr r0, =S5PC100_VIC0_BASE @0xE4000000
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ldr r1, =S5PC100_VIC1_BASE @0xE4000000
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ldr r2, =S5PC100_VIC2_BASE @0xE4000000
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/* Disable all interrupts (VIC0, VIC1 and VIC2) */
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mvn r3, #0x0
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str r3, [r0, #0x14] @INTENCLEAR
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str r3, [r1, #0x14] @INTENCLEAR
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str r3, [r2, #0x14] @INTENCLEAR
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#ifndef CONFIG_ONENAND_IPL
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/* Set all interrupts as IRQ */
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str r5, [r0, #0xc] @INTSELECT
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str r5, [r1, #0xc] @INTSELECT
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str r5, [r2, #0xc] @INTSELECT
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/* Pending Interrupt Clear */
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str r5, [r0, #0xf00] @INTADDRESS
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str r5, [r1, #0xf00] @INTADDRESS
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str r5, [r2, #0xf00] @INTADDRESS
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#endif
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#ifndef CONFIG_ONENAND_IPL
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/* for UART */
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bl uart_asm_init
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/* for TZPC */
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bl tzpc_asm_init
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#endif
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#ifdef CONFIG_ONENAND_IPL
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/* init system clock */
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bl system_clock_init
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bl mem_ctrl_asm_init
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/* Wakeup support. Don't know if it's going to be used, untested. */
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ldr r0, =S5PC100_RST_STAT
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ldr r1, [r0]
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bic r1, r1, #0xfffffff7
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cmp r1, #0x8
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beq wakeup_reset
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#endif
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1:
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mov lr, r9
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mov pc, lr
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#ifdef CONFIG_ONENAND_IPL
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wakeup_reset:
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/* Clear wakeup status register */
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ldr r0, =S5PC100_WAKEUP_STAT
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ldr r1, [r0]
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str r1, [r0]
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/* Load return address and jump to kernel */
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ldr r0, =S5PC100_INFORM0
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/* r1 = physical address of s5pc100_cpu_resume function */
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ldr r1, [r0]
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/* Jump to kernel (sleep.S) */
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mov pc, r1
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nop
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nop
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#endif
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/*
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* system_clock_init: Initialize core clock and bus clock.
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* void system_clock_init(void)
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*/
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system_clock_init:
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ldr r8, =S5PC1XX_CLOCK_BASE @ 0xE0100000
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/* Set Clock divider */
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ldr r1, =0x00011110
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str r1, [r8, #0x304]
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ldr r1, =0x1
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str r1, [r8, #0x308]
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ldr r1, =0x00011301
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str r1, [r8, #0x300]
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/* Set Lock Time */
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ldr r1, =0xe10 @ Locktime : 0xe10 = 3600
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str r1, [r8, #0x000] @ APLL_LOCK
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str r1, [r8, #0x004] @ MPLL_LOCK
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str r1, [r8, #0x008] @ EPLL_LOCK
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str r1, [r8, #0x00C] @ HPLL_LOCK
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/* APLL_CON */
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ldr r1, =0x81bc0400 @ SDIV 0, PDIV 4, MDIV 444 (1332MHz)
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str r1, [r8, #0x100]
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/* MPLL_CON */
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ldr r1, =0x80590201 @ SDIV 1, PDIV 2, MDIV 89 (267MHz)
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str r1, [r8, #0x104]
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/* EPLL_CON */
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ldr r1, =0x80870303 @ SDIV 3, PDIV 3, MDIV 135 (67.5MHz)
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str r1, [r8, #0x108]
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/* HPLL_CON */
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ldr r1, =0x80600603
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str r1, [r8, #0x10C]
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/* Set Source Clock */
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ldr r1, =0x1111 @ A, M, E, HPLL Muxing
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str r1, [r8, #0x200] @ CLK_SRC0
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ldr r1, =0x1000001 @ Uart Clock & CLK48M Muxing
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str r1, [r8, #0x204] @ CLK_SRC1
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ldr r1, =0x9000 @ ARMCLK/4
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str r1, [r8, #0x400] @ CLK_OUT
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/* wait at least 200us to stablize all clock */
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mov r2, #0x10000
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1: subs r2, r2, #1
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bne 1b
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mov pc, lr
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#ifndef CONFIG_ONENAND_IPL
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/*
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* uart_asm_init: Initialize UART's pins
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*/
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uart_asm_init:
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mov r0, r8
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ldr r1, =0x22222222
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str r1, [r0, #0x0] @ GPA0_CON
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ldr r1, =0x00022222
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str r1, [r0, #0x20] @ GPA1_CON
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mov pc, lr
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/*
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* tzpc_asm_init: Initialize TZPC
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*/
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tzpc_asm_init:
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ldr r0, =0xE3800000
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mov r1, #0x0
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str r1, [r0]
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mov r1, #0xff
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str r1, [r0, #0x804]
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str r1, [r0, #0x810]
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ldr r0, =0xE2800000
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str r1, [r0, #0x804]
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str r1, [r0, #0x810]
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str r1, [r0, #0x81C]
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ldr r0, =0xE2900000
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str r1, [r0, #0x804]
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str r1, [r0, #0x810]
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mov pc, lr
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#endif
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