ea31fd4330
This patch adds suspend-to-ram support for S5PV210. Note. This patch is confirmed on SMDKV210 and SMDKC110 board. Signed-off-by: Jongpill Lee <boyko.lee@samsung.com> Signed-off-by: Sangbeom Kim <sbkim73@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
167 lines
3.8 KiB
C
167 lines
3.8 KiB
C
/* linux/arch/arm/mach-s5pv210/pm.c
|
|
*
|
|
* Copyright (c) 2010 Samsung Electronics Co., Ltd.
|
|
* http://www.samsung.com
|
|
*
|
|
* S5PV210 - Power Management support
|
|
*
|
|
* Based on arch/arm/mach-s3c2410/pm.c
|
|
* Copyright (c) 2006 Simtec Electronics
|
|
* Ben Dooks <ben@simtec.co.uk>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/suspend.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <plat/cpu.h>
|
|
#include <plat/pm.h>
|
|
#include <plat/regs-timer.h>
|
|
|
|
#include <mach/regs-irq.h>
|
|
#include <mach/regs-clock.h>
|
|
|
|
static struct sleep_save s5pv210_core_save[] = {
|
|
/* Clock source */
|
|
SAVE_ITEM(S5P_CLK_SRC0),
|
|
SAVE_ITEM(S5P_CLK_SRC1),
|
|
SAVE_ITEM(S5P_CLK_SRC2),
|
|
SAVE_ITEM(S5P_CLK_SRC3),
|
|
SAVE_ITEM(S5P_CLK_SRC4),
|
|
SAVE_ITEM(S5P_CLK_SRC5),
|
|
SAVE_ITEM(S5P_CLK_SRC6),
|
|
|
|
/* Clock source Mask */
|
|
SAVE_ITEM(S5P_CLK_SRC_MASK0),
|
|
SAVE_ITEM(S5P_CLK_SRC_MASK1),
|
|
|
|
/* Clock Divider */
|
|
SAVE_ITEM(S5P_CLK_DIV0),
|
|
SAVE_ITEM(S5P_CLK_DIV1),
|
|
SAVE_ITEM(S5P_CLK_DIV2),
|
|
SAVE_ITEM(S5P_CLK_DIV3),
|
|
SAVE_ITEM(S5P_CLK_DIV4),
|
|
SAVE_ITEM(S5P_CLK_DIV5),
|
|
SAVE_ITEM(S5P_CLK_DIV6),
|
|
SAVE_ITEM(S5P_CLK_DIV7),
|
|
|
|
/* Clock Main Gate */
|
|
SAVE_ITEM(S5P_CLKGATE_MAIN0),
|
|
SAVE_ITEM(S5P_CLKGATE_MAIN1),
|
|
SAVE_ITEM(S5P_CLKGATE_MAIN2),
|
|
|
|
/* Clock source Peri Gate */
|
|
SAVE_ITEM(S5P_CLKGATE_PERI0),
|
|
SAVE_ITEM(S5P_CLKGATE_PERI1),
|
|
|
|
/* Clock source SCLK Gate */
|
|
SAVE_ITEM(S5P_CLKGATE_SCLK0),
|
|
SAVE_ITEM(S5P_CLKGATE_SCLK1),
|
|
|
|
/* Clock IP Clock gate */
|
|
SAVE_ITEM(S5P_CLKGATE_IP0),
|
|
SAVE_ITEM(S5P_CLKGATE_IP1),
|
|
SAVE_ITEM(S5P_CLKGATE_IP2),
|
|
SAVE_ITEM(S5P_CLKGATE_IP3),
|
|
SAVE_ITEM(S5P_CLKGATE_IP4),
|
|
|
|
/* Clock Blcok and Bus gate */
|
|
SAVE_ITEM(S5P_CLKGATE_BLOCK),
|
|
SAVE_ITEM(S5P_CLKGATE_BUS0),
|
|
|
|
/* Clock ETC */
|
|
SAVE_ITEM(S5P_CLK_OUT),
|
|
SAVE_ITEM(S5P_MDNIE_SEL),
|
|
|
|
/* PWM Register */
|
|
SAVE_ITEM(S3C2410_TCFG0),
|
|
SAVE_ITEM(S3C2410_TCFG1),
|
|
SAVE_ITEM(S3C64XX_TINT_CSTAT),
|
|
SAVE_ITEM(S3C2410_TCON),
|
|
SAVE_ITEM(S3C2410_TCNTB(0)),
|
|
SAVE_ITEM(S3C2410_TCMPB(0)),
|
|
SAVE_ITEM(S3C2410_TCNTO(0)),
|
|
};
|
|
|
|
void s5pv210_cpu_suspend(void)
|
|
{
|
|
unsigned long tmp;
|
|
|
|
/* issue the standby signal into the pm unit. Note, we
|
|
* issue a write-buffer drain just in case */
|
|
|
|
tmp = 0;
|
|
|
|
asm("b 1f\n\t"
|
|
".align 5\n\t"
|
|
"1:\n\t"
|
|
"mcr p15, 0, %0, c7, c10, 5\n\t"
|
|
"mcr p15, 0, %0, c7, c10, 4\n\t"
|
|
"wfi" : : "r" (tmp));
|
|
|
|
/* we should never get past here */
|
|
panic("sleep resumed to originator?");
|
|
}
|
|
|
|
static void s5pv210_pm_prepare(void)
|
|
{
|
|
unsigned int tmp;
|
|
|
|
/* ensure at least INFORM0 has the resume address */
|
|
__raw_writel(virt_to_phys(s3c_cpu_resume), S5P_INFORM0);
|
|
|
|
tmp = __raw_readl(S5P_SLEEP_CFG);
|
|
tmp &= ~(S5P_SLEEP_CFG_OSC_EN | S5P_SLEEP_CFG_USBOSC_EN);
|
|
__raw_writel(tmp, S5P_SLEEP_CFG);
|
|
|
|
/* WFI for SLEEP mode configuration by SYSCON */
|
|
tmp = __raw_readl(S5P_PWR_CFG);
|
|
tmp &= S5P_CFG_WFI_CLEAN;
|
|
tmp |= S5P_CFG_WFI_SLEEP;
|
|
__raw_writel(tmp, S5P_PWR_CFG);
|
|
|
|
/* SYSCON interrupt handling disable */
|
|
tmp = __raw_readl(S5P_OTHERS);
|
|
tmp |= S5P_OTHER_SYSC_INTOFF;
|
|
__raw_writel(tmp, S5P_OTHERS);
|
|
|
|
s3c_pm_do_save(s5pv210_core_save, ARRAY_SIZE(s5pv210_core_save));
|
|
}
|
|
|
|
static int s5pv210_pm_add(struct sys_device *sysdev)
|
|
{
|
|
pm_cpu_prep = s5pv210_pm_prepare;
|
|
pm_cpu_sleep = s5pv210_cpu_suspend;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s5pv210_pm_resume(struct sys_device *dev)
|
|
{
|
|
u32 tmp;
|
|
|
|
tmp = __raw_readl(S5P_OTHERS);
|
|
tmp |= (S5P_OTHERS_RET_IO | S5P_OTHERS_RET_CF |\
|
|
S5P_OTHERS_RET_MMC | S5P_OTHERS_RET_UART);
|
|
__raw_writel(tmp , S5P_OTHERS);
|
|
|
|
s3c_pm_do_restore_core(s5pv210_core_save, ARRAY_SIZE(s5pv210_core_save));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sysdev_driver s5pv210_pm_driver = {
|
|
.add = s5pv210_pm_add,
|
|
.resume = s5pv210_pm_resume,
|
|
};
|
|
|
|
static __init int s5pv210_pm_drvinit(void)
|
|
{
|
|
return sysdev_driver_register(&s5pv210_sysclass, &s5pv210_pm_driver);
|
|
}
|
|
arch_initcall(s5pv210_pm_drvinit);
|