mirror of
https://github.com/AsahiLinux/u-boot
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77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/*
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* Lowlevel setup for EXYNOS5 based board
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*
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* Copyright (C) 2013 Samsung Electronics
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* Rajeshwari Shinde <rajeshwari.s@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 <common.h>
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#include <config.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/dmc.h>
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#include <asm/arch/power.h>
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#include <asm/arch/tzpc.h>
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#include <asm/arch/periph.h>
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#include <asm/arch/pinmux.h>
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#include "common_setup.h"
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/* These are the things we can do during low-level init */
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enum {
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DO_WAKEUP = 1 << 0,
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DO_CLOCKS = 1 << 1,
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DO_MEM_RESET = 1 << 2,
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DO_UART = 1 << 3,
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DO_POWER = 1 << 4,
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};
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int do_lowlevel_init(void)
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{
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uint32_t reset_status;
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int actions = 0;
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arch_cpu_init();
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reset_status = get_reset_status();
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switch (reset_status) {
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case S5P_CHECK_SLEEP:
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actions = DO_CLOCKS | DO_WAKEUP;
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break;
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case S5P_CHECK_DIDLE:
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case S5P_CHECK_LPA:
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actions = DO_WAKEUP;
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break;
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default:
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/* This is a normal boot (not a wake from sleep) */
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actions = DO_CLOCKS | DO_MEM_RESET | DO_POWER;
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}
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if (actions & DO_POWER)
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set_ps_hold_ctrl();
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if (actions & DO_CLOCKS) {
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system_clock_init();
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mem_ctrl_init(actions & DO_MEM_RESET);
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tzpc_init();
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}
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return actions & DO_WAKEUP;
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}
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