mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/*
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* linux/arch/mips/jz4740/common/pm.c
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*
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* JZ4740 Power Management Routines
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*
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* Copyright (C) 2006 Ingenic Semiconductor Inc.
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* Author: <jlwei@ingenic.cn>
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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*/
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#include <linux/init.h>
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#include <linux/pm.h>
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#include <linux/delay.h>
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#include <linux/suspend.h>
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#include <asm/mach-jz4740/regs.h>
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extern void jz4740_intc_suspend(void);
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extern void jz4740_intc_resume(void);
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static int jz_pm_enter(suspend_state_t state)
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{
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unsigned long nfcsr = REG_EMC_NFCSR;
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uint32_t scr = REG_CPM_SCR;
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/* Disable nand flash */
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REG_EMC_NFCSR = ~0xff;
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udelay(100);
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/*stop udc and usb*/
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REG_CPM_SCR &= ~( 1<<6 | 1<<7);
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REG_CPM_SCR |= 0<<6 | 1<<7;
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jz4740_intc_suspend();
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/* Enter SLEEP mode */
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REG_CPM_LCR &= ~CPM_LCR_LPM_MASK;
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REG_CPM_LCR |= CPM_LCR_LPM_SLEEP;
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__asm__(".set\tmips3\n\t"
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"wait\n\t"
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".set\tmips0");
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/* Restore to IDLE mode */
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REG_CPM_LCR &= ~CPM_LCR_LPM_MASK;
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REG_CPM_LCR |= CPM_LCR_LPM_IDLE;
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/* Restore nand flash control register */
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REG_EMC_NFCSR = nfcsr;
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jz4740_intc_resume();
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/* Restore sleep control register */
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REG_CPM_SCR = scr;
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return 0;
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}
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static struct platform_suspend_ops jz_pm_ops = {
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.valid = suspend_valid_only_mem,
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.enter = jz_pm_enter,
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};
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/*
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* Initialize power interface
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*/
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int __init jz_pm_init(void)
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{
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suspend_set_ops(&jz_pm_ops);
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return 0;
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}
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late_initcall(jz_pm_init);
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