mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 23:15:26 +07:00
38a94f4169
Registering the driver, or the device, can fail, let's check the return code and return the error code to the PM layer. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
157 lines
4.3 KiB
C
157 lines
4.3 KiB
C
/*
|
|
* arch/sh/kernel/cpu/shmobile/pm.c
|
|
*
|
|
* Power management support code for SuperH Mobile
|
|
*
|
|
* Copyright (C) 2009 Magnus Damm
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/io.h>
|
|
#include <linux/suspend.h>
|
|
#include <asm/suspend.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/bl_bit.h>
|
|
|
|
/*
|
|
* Notifier lists for pre/post sleep notification
|
|
*/
|
|
ATOMIC_NOTIFIER_HEAD(sh_mobile_pre_sleep_notifier_list);
|
|
ATOMIC_NOTIFIER_HEAD(sh_mobile_post_sleep_notifier_list);
|
|
|
|
/*
|
|
* Sleep modes available on SuperH Mobile:
|
|
*
|
|
* Sleep mode is just plain "sleep" instruction
|
|
* Sleep Self-Refresh mode is above plus RAM put in Self-Refresh
|
|
* Standby Self-Refresh mode is above plus stopped clocks
|
|
*/
|
|
#define SUSP_MODE_SLEEP (SUSP_SH_SLEEP)
|
|
#define SUSP_MODE_SLEEP_SF (SUSP_SH_SLEEP | SUSP_SH_SF)
|
|
#define SUSP_MODE_STANDBY_SF (SUSP_SH_STANDBY | SUSP_SH_SF)
|
|
#define SUSP_MODE_RSTANDBY_SF \
|
|
(SUSP_SH_RSTANDBY | SUSP_SH_MMU | SUSP_SH_REGS | SUSP_SH_SF)
|
|
/*
|
|
* U-standby mode is unsupported since it needs bootloader hacks
|
|
*/
|
|
|
|
#ifdef CONFIG_CPU_SUBTYPE_SH7724
|
|
#define RAM_BASE 0xfd800000 /* RSMEM */
|
|
#else
|
|
#define RAM_BASE 0xe5200000 /* ILRAM */
|
|
#endif
|
|
|
|
void sh_mobile_call_standby(unsigned long mode)
|
|
{
|
|
void *onchip_mem = (void *)RAM_BASE;
|
|
struct sh_sleep_data *sdp = onchip_mem;
|
|
void (*standby_onchip_mem)(unsigned long, unsigned long);
|
|
|
|
/* code located directly after data structure */
|
|
standby_onchip_mem = (void *)(sdp + 1);
|
|
|
|
atomic_notifier_call_chain(&sh_mobile_pre_sleep_notifier_list,
|
|
mode, NULL);
|
|
|
|
/* flush the caches if MMU flag is set */
|
|
if (mode & SUSP_SH_MMU)
|
|
flush_cache_all();
|
|
|
|
/* Let assembly snippet in on-chip memory handle the rest */
|
|
standby_onchip_mem(mode, RAM_BASE);
|
|
|
|
atomic_notifier_call_chain(&sh_mobile_post_sleep_notifier_list,
|
|
mode, NULL);
|
|
}
|
|
|
|
extern char sh_mobile_sleep_enter_start;
|
|
extern char sh_mobile_sleep_enter_end;
|
|
|
|
extern char sh_mobile_sleep_resume_start;
|
|
extern char sh_mobile_sleep_resume_end;
|
|
|
|
unsigned long sh_mobile_sleep_supported = SUSP_SH_SLEEP;
|
|
|
|
void sh_mobile_register_self_refresh(unsigned long flags,
|
|
void *pre_start, void *pre_end,
|
|
void *post_start, void *post_end)
|
|
{
|
|
void *onchip_mem = (void *)RAM_BASE;
|
|
void *vp;
|
|
struct sh_sleep_data *sdp;
|
|
int n;
|
|
|
|
/* part 0: data area */
|
|
sdp = onchip_mem;
|
|
sdp->addr.stbcr = 0xa4150020; /* STBCR */
|
|
sdp->addr.bar = 0xa4150040; /* BAR */
|
|
sdp->addr.pteh = 0xff000000; /* PTEH */
|
|
sdp->addr.ptel = 0xff000004; /* PTEL */
|
|
sdp->addr.ttb = 0xff000008; /* TTB */
|
|
sdp->addr.tea = 0xff00000c; /* TEA */
|
|
sdp->addr.mmucr = 0xff000010; /* MMUCR */
|
|
sdp->addr.ptea = 0xff000034; /* PTEA */
|
|
sdp->addr.pascr = 0xff000070; /* PASCR */
|
|
sdp->addr.irmcr = 0xff000078; /* IRMCR */
|
|
sdp->addr.ccr = 0xff00001c; /* CCR */
|
|
sdp->addr.ramcr = 0xff000074; /* RAMCR */
|
|
vp = sdp + 1;
|
|
|
|
/* part 1: common code to enter sleep mode */
|
|
n = &sh_mobile_sleep_enter_end - &sh_mobile_sleep_enter_start;
|
|
memcpy(vp, &sh_mobile_sleep_enter_start, n);
|
|
vp += roundup(n, 4);
|
|
|
|
/* part 2: board specific code to enter self-refresh mode */
|
|
n = pre_end - pre_start;
|
|
memcpy(vp, pre_start, n);
|
|
sdp->sf_pre = (unsigned long)vp;
|
|
vp += roundup(n, 4);
|
|
|
|
/* part 3: board specific code to resume from self-refresh mode */
|
|
n = post_end - post_start;
|
|
memcpy(vp, post_start, n);
|
|
sdp->sf_post = (unsigned long)vp;
|
|
vp += roundup(n, 4);
|
|
|
|
/* part 4: common code to resume from sleep mode */
|
|
WARN_ON(vp > (onchip_mem + 0x600));
|
|
vp = onchip_mem + 0x600; /* located at interrupt vector */
|
|
n = &sh_mobile_sleep_resume_end - &sh_mobile_sleep_resume_start;
|
|
memcpy(vp, &sh_mobile_sleep_resume_start, n);
|
|
sdp->resume = (unsigned long)vp;
|
|
|
|
sh_mobile_sleep_supported |= flags;
|
|
}
|
|
|
|
static int sh_pm_enter(suspend_state_t state)
|
|
{
|
|
if (!(sh_mobile_sleep_supported & SUSP_MODE_STANDBY_SF))
|
|
return -ENXIO;
|
|
|
|
local_irq_disable();
|
|
set_bl_bit();
|
|
sh_mobile_call_standby(SUSP_MODE_STANDBY_SF);
|
|
local_irq_disable();
|
|
clear_bl_bit();
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_suspend_ops sh_pm_ops = {
|
|
.enter = sh_pm_enter,
|
|
.valid = suspend_valid_only_mem,
|
|
};
|
|
|
|
static int __init sh_pm_init(void)
|
|
{
|
|
suspend_set_ops(&sh_pm_ops);
|
|
return sh_mobile_setup_cpuidle();
|
|
}
|
|
|
|
late_initcall(sh_pm_init);
|