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.
170 lines
4.0 KiB
170 lines
4.0 KiB
// SPDX-License-Identifier: GPL-2.0+ |
|
// |
|
// Copyright (c) 2006 Simtec Electronics |
|
// Ben Dooks <[email protected]> |
|
// |
|
// S3C2410 (and compatible) Power Manager (Suspend-To-RAM) support |
|
|
|
#include <linux/init.h> |
|
#include <linux/suspend.h> |
|
#include <linux/errno.h> |
|
#include <linux/time.h> |
|
#include <linux/device.h> |
|
#include <linux/syscore_ops.h> |
|
#include <linux/gpio.h> |
|
#include <linux/io.h> |
|
|
|
#include <asm/mach-types.h> |
|
|
|
#include "regs-gpio.h" |
|
#include "gpio-samsung.h" |
|
|
|
#include "gpio-cfg.h" |
|
#include "cpu.h" |
|
#include "pm.h" |
|
|
|
#include "h1940.h" |
|
|
|
static void s3c2410_pm_prepare(void) |
|
{ |
|
/* ensure at least GSTATUS3 has the resume address */ |
|
|
|
__raw_writel(__pa_symbol(s3c_cpu_resume), S3C2410_GSTATUS3); |
|
|
|
S3C_PMDBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3)); |
|
S3C_PMDBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4)); |
|
|
|
if (machine_is_h1940()) { |
|
void *base = phys_to_virt(H1940_SUSPEND_CHECK); |
|
unsigned long ptr; |
|
unsigned long calc = 0; |
|
|
|
/* generate check for the bootloader to check on resume */ |
|
|
|
for (ptr = 0; ptr < 0x40000; ptr += 0x400) |
|
calc += __raw_readl(base+ptr); |
|
|
|
__raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM)); |
|
} |
|
|
|
/* RX3715 and RX1950 use similar to H1940 code and the |
|
* same offsets for resume and checksum pointers */ |
|
|
|
if (machine_is_rx3715() || machine_is_rx1950()) { |
|
void *base = phys_to_virt(H1940_SUSPEND_CHECK); |
|
unsigned long ptr; |
|
unsigned long calc = 0; |
|
|
|
/* generate check for the bootloader to check on resume */ |
|
|
|
for (ptr = 0; ptr < 0x40000; ptr += 0x4) |
|
calc += __raw_readl(base+ptr); |
|
|
|
__raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM)); |
|
} |
|
|
|
if (machine_is_aml_m5900()) { |
|
gpio_request_one(S3C2410_GPF(2), GPIOF_OUT_INIT_HIGH, NULL); |
|
gpio_free(S3C2410_GPF(2)); |
|
} |
|
|
|
if (machine_is_rx1950()) { |
|
/* According to S3C2442 user's manual, page 7-17, |
|
* when the system is operating in NAND boot mode, |
|
* the hardware pin configuration - EINT[23:21] – |
|
* must be set as input for starting up after |
|
* wakeup from sleep mode |
|
*/ |
|
s3c_gpio_cfgpin(S3C2410_GPG(13), S3C2410_GPIO_INPUT); |
|
s3c_gpio_cfgpin(S3C2410_GPG(14), S3C2410_GPIO_INPUT); |
|
s3c_gpio_cfgpin(S3C2410_GPG(15), S3C2410_GPIO_INPUT); |
|
} |
|
} |
|
|
|
static void s3c2410_pm_resume(void) |
|
{ |
|
unsigned long tmp; |
|
|
|
/* unset the return-from-sleep flag, to ensure reset */ |
|
|
|
tmp = __raw_readl(S3C2410_GSTATUS2); |
|
tmp &= S3C2410_GSTATUS2_OFFRESET; |
|
__raw_writel(tmp, S3C2410_GSTATUS2); |
|
|
|
if (machine_is_aml_m5900()) { |
|
gpio_request_one(S3C2410_GPF(2), GPIOF_OUT_INIT_LOW, NULL); |
|
gpio_free(S3C2410_GPF(2)); |
|
} |
|
} |
|
|
|
struct syscore_ops s3c2410_pm_syscore_ops = { |
|
.resume = s3c2410_pm_resume, |
|
}; |
|
|
|
static int s3c2410_pm_add(struct device *dev, struct subsys_interface *sif) |
|
{ |
|
pm_cpu_prep = s3c2410_pm_prepare; |
|
pm_cpu_sleep = s3c2410_cpu_suspend; |
|
|
|
return 0; |
|
} |
|
|
|
#if defined(CONFIG_CPU_S3C2410) |
|
static struct subsys_interface s3c2410_pm_interface = { |
|
.name = "s3c2410_pm", |
|
.subsys = &s3c2410_subsys, |
|
.add_dev = s3c2410_pm_add, |
|
}; |
|
|
|
/* register ourselves */ |
|
|
|
static int __init s3c2410_pm_drvinit(void) |
|
{ |
|
return subsys_interface_register(&s3c2410_pm_interface); |
|
} |
|
|
|
arch_initcall(s3c2410_pm_drvinit); |
|
|
|
static struct subsys_interface s3c2410a_pm_interface = { |
|
.name = "s3c2410a_pm", |
|
.subsys = &s3c2410a_subsys, |
|
.add_dev = s3c2410_pm_add, |
|
}; |
|
|
|
static int __init s3c2410a_pm_drvinit(void) |
|
{ |
|
return subsys_interface_register(&s3c2410a_pm_interface); |
|
} |
|
|
|
arch_initcall(s3c2410a_pm_drvinit); |
|
#endif |
|
|
|
#if defined(CONFIG_CPU_S3C2440) |
|
static struct subsys_interface s3c2440_pm_interface = { |
|
.name = "s3c2440_pm", |
|
.subsys = &s3c2440_subsys, |
|
.add_dev = s3c2410_pm_add, |
|
}; |
|
|
|
static int __init s3c2440_pm_drvinit(void) |
|
{ |
|
return subsys_interface_register(&s3c2440_pm_interface); |
|
} |
|
|
|
arch_initcall(s3c2440_pm_drvinit); |
|
#endif |
|
|
|
#if defined(CONFIG_CPU_S3C2442) |
|
static struct subsys_interface s3c2442_pm_interface = { |
|
.name = "s3c2442_pm", |
|
.subsys = &s3c2442_subsys, |
|
.add_dev = s3c2410_pm_add, |
|
}; |
|
|
|
static int __init s3c2442_pm_drvinit(void) |
|
{ |
|
return subsys_interface_register(&s3c2442_pm_interface); |
|
} |
|
|
|
arch_initcall(s3c2442_pm_drvinit); |
|
#endif
|
|
|