forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
153 lines
3.4 KiB
153 lines
3.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* power management entry for CSR SiRFprimaII |
|
* |
|
* Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. |
|
*/ |
|
|
|
#include <linux/kernel.h> |
|
#include <linux/suspend.h> |
|
#include <linux/slab.h> |
|
#include <linux/export.h> |
|
#include <linux/of.h> |
|
#include <linux/of_address.h> |
|
#include <linux/of_device.h> |
|
#include <linux/of_platform.h> |
|
#include <linux/io.h> |
|
#include <linux/rtc/sirfsoc_rtciobrg.h> |
|
#include <asm/outercache.h> |
|
#include <asm/suspend.h> |
|
#include <asm/hardware/cache-l2x0.h> |
|
|
|
#include "pm.h" |
|
|
|
/* |
|
* suspend asm codes will access these to make DRAM become self-refresh and |
|
* system sleep |
|
*/ |
|
u32 sirfsoc_pwrc_base; |
|
void __iomem *sirfsoc_memc_base; |
|
|
|
static void sirfsoc_set_wakeup_source(void) |
|
{ |
|
u32 pwr_trigger_en_reg; |
|
pwr_trigger_en_reg = sirfsoc_rtc_iobrg_readl(sirfsoc_pwrc_base + |
|
SIRFSOC_PWRC_TRIGGER_EN); |
|
#define X_ON_KEY_B (1 << 0) |
|
#define RTC_ALARM0_B (1 << 2) |
|
#define RTC_ALARM1_B (1 << 3) |
|
sirfsoc_rtc_iobrg_writel(pwr_trigger_en_reg | X_ON_KEY_B | |
|
RTC_ALARM0_B | RTC_ALARM1_B, |
|
sirfsoc_pwrc_base + SIRFSOC_PWRC_TRIGGER_EN); |
|
} |
|
|
|
static void sirfsoc_set_sleep_mode(u32 mode) |
|
{ |
|
u32 sleep_mode = sirfsoc_rtc_iobrg_readl(sirfsoc_pwrc_base + |
|
SIRFSOC_PWRC_PDN_CTRL); |
|
sleep_mode &= ~(SIRFSOC_SLEEP_MODE_MASK << 1); |
|
sleep_mode |= mode << 1; |
|
sirfsoc_rtc_iobrg_writel(sleep_mode, sirfsoc_pwrc_base + |
|
SIRFSOC_PWRC_PDN_CTRL); |
|
} |
|
|
|
static int sirfsoc_pre_suspend_power_off(void) |
|
{ |
|
u32 wakeup_entry = __pa_symbol(cpu_resume); |
|
|
|
sirfsoc_rtc_iobrg_writel(wakeup_entry, sirfsoc_pwrc_base + |
|
SIRFSOC_PWRC_SCRATCH_PAD1); |
|
|
|
sirfsoc_set_wakeup_source(); |
|
|
|
sirfsoc_set_sleep_mode(SIRFSOC_DEEP_SLEEP_MODE); |
|
|
|
return 0; |
|
} |
|
|
|
static int sirfsoc_pm_enter(suspend_state_t state) |
|
{ |
|
switch (state) { |
|
case PM_SUSPEND_MEM: |
|
sirfsoc_pre_suspend_power_off(); |
|
|
|
outer_disable(); |
|
/* go zzz */ |
|
cpu_suspend(0, sirfsoc_finish_suspend); |
|
outer_resume(); |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
return 0; |
|
} |
|
|
|
static const struct platform_suspend_ops sirfsoc_pm_ops = { |
|
.enter = sirfsoc_pm_enter, |
|
.valid = suspend_valid_only_mem, |
|
}; |
|
|
|
static const struct of_device_id pwrc_ids[] = { |
|
{ .compatible = "sirf,prima2-pwrc" }, |
|
{} |
|
}; |
|
|
|
static int __init sirfsoc_of_pwrc_init(void) |
|
{ |
|
struct device_node *np; |
|
|
|
np = of_find_matching_node(NULL, pwrc_ids); |
|
if (!np) { |
|
pr_err("unable to find compatible sirf pwrc node in dtb\n"); |
|
return -ENOENT; |
|
} |
|
|
|
/* |
|
* pwrc behind rtciobrg is not located in memory space |
|
* though the property is named reg. reg only means base |
|
* offset for pwrc. then of_iomap is not suitable here. |
|
*/ |
|
if (of_property_read_u32(np, "reg", &sirfsoc_pwrc_base)) |
|
panic("unable to find base address of pwrc node in dtb\n"); |
|
|
|
of_node_put(np); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct of_device_id memc_ids[] = { |
|
{ .compatible = "sirf,prima2-memc" }, |
|
{} |
|
}; |
|
|
|
static int sirfsoc_memc_probe(struct platform_device *op) |
|
{ |
|
struct device_node *np = op->dev.of_node; |
|
|
|
sirfsoc_memc_base = of_iomap(np, 0); |
|
if (!sirfsoc_memc_base) |
|
panic("unable to map memc registers\n"); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver sirfsoc_memc_driver = { |
|
.probe = sirfsoc_memc_probe, |
|
.driver = { |
|
.name = "sirfsoc-memc", |
|
.of_match_table = memc_ids, |
|
}, |
|
}; |
|
|
|
static int __init sirfsoc_memc_init(void) |
|
{ |
|
return platform_driver_register(&sirfsoc_memc_driver); |
|
} |
|
|
|
int __init sirfsoc_pm_init(void) |
|
{ |
|
sirfsoc_of_pwrc_init(); |
|
sirfsoc_memc_init(); |
|
suspend_set_ops(&sirfsoc_pm_ops); |
|
return 0; |
|
}
|
|
|