mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-09-20 02:24:45 +03:00
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
|
||
|
|
* JZ4740 SoC power management support
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* 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.,
|
||
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/pm.h>
|
||
|
|
#include <linux/delay.h>
|
||
|
|
#include <linux/suspend.h>
|
||
|
|
#include <asm/mach-jz4740/regs.h>
|
||
|
|
|
||
|
|
extern void jz4740_intc_suspend(void);
|
||
|
|
extern void jz4740_intc_resume(void);
|
||
|
|
|
||
|
|
static int jz_pm_enter(suspend_state_t state)
|
||
|
|
{
|
||
|
|
unsigned long nfcsr = REG_EMC_NFCSR;
|
||
|
|
uint32_t scr = REG_CPM_SCR;
|
||
|
|
|
||
|
|
/* Disable nand flash */
|
||
|
|
REG_EMC_NFCSR = ~0xff;
|
||
|
|
|
||
|
|
udelay(100);
|
||
|
|
|
||
|
|
/*stop udc and usb*/
|
||
|
|
REG_CPM_SCR &= ~( 1<<6 | 1<<7);
|
||
|
|
REG_CPM_SCR |= 0<<6 | 1<<7;
|
||
|
|
|
||
|
|
jz4740_intc_suspend();
|
||
|
|
|
||
|
|
/* Enter SLEEP mode */
|
||
|
|
REG_CPM_LCR &= ~CPM_LCR_LPM_MASK;
|
||
|
|
REG_CPM_LCR |= CPM_LCR_LPM_SLEEP;
|
||
|
|
__asm__(".set\tmips3\n\t"
|
||
|
|
"wait\n\t"
|
||
|
|
".set\tmips0");
|
||
|
|
|
||
|
|
/* Restore to IDLE mode */
|
||
|
|
REG_CPM_LCR &= ~CPM_LCR_LPM_MASK;
|
||
|
|
REG_CPM_LCR |= CPM_LCR_LPM_IDLE;
|
||
|
|
|
||
|
|
/* Restore nand flash control register */
|
||
|
|
REG_EMC_NFCSR = nfcsr;
|
||
|
|
|
||
|
|
jz4740_intc_resume();
|
||
|
|
|
||
|
|
/* Restore sleep control register */
|
||
|
|
REG_CPM_SCR = scr;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct platform_suspend_ops jz_pm_ops = {
|
||
|
|
.valid = suspend_valid_only_mem,
|
||
|
|
.enter = jz_pm_enter,
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Initialize power interface
|
||
|
|
*/
|
||
|
|
int __init jz_pm_init(void)
|
||
|
|
{
|
||
|
|
suspend_set_ops(&jz_pm_ops);
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
}
|
||
|
|
late_initcall(jz_pm_init);
|