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[ARM] S3C: Move PM support functions to common location

Browse Source 
Start moving the PM code by moving all the common support functions
to a common location in arch/arm/plat-s3c. With the move we rename
the functions from s3cxxx_ to s3c_ to fit the new location.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks 2008-12-12 00:24:06 +00:00
parent a3f66351b3
commit 6419711a16
9 changed files with 171 additions and 110 deletions
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11
arch/arm/mach-s3c2410/pm.c
View File

@ -37,21 +37,14 @@
#include <plat/cpu.h>
#include <plat/pm.h>
#ifdef CONFIG_S3C2410_PM_DEBUG
extern void pm_dbg(const char *fmt, ...);
#define DBG(fmt...) pm_dbg(fmt)
#else
#define DBG(fmt...) printk(KERN_DEBUG fmt)
#endif
static void s3c2410_pm_prepare(void)
{
/* ensure at least GSTATUS3 has the resume address */
__raw_writel(virt_to_phys(s3c2410_cpu_resume), S3C2410_GSTATUS3);
DBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3));
DBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4));
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);

4
arch/arm/mach-s3c2412/pm.c
View File

@ -85,7 +85,7 @@ static struct sleep_save s3c2412_sleep[] = {
static int s3c2412_pm_suspend(struct sys_device *dev, pm_message_t state)
{
s3c2410_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
return 0;
}
@ -98,7 +98,7 @@ static int s3c2412_pm_resume(struct sys_device *dev)
tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
__raw_writel(tmp, S3C2412_PWRCFG);
s3c2410_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
return 0;
}

4
arch/arm/plat-s3c/Makefile
View File

@ -18,6 +18,10 @@ obj-y += pwm-clock.o
obj-y += gpio.o
obj-y += gpio-config.o
# PM support
obj-$(CONFIG_PM) += pm.o
# devices
obj-$(CONFIG_S3C_DEV_HSMMC) += dev-hsmmc.o

36
arch/arm/plat-s3c/include/plat/pm.h
View File

@ -1,6 +1,7 @@
/* linux/include/asm-arm/plat-s3c24xx/pm.h
*
* Copyright (c) 2004 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Written by Ben Dooks, <ben@simtec.co.uk>
*
* This program is free software; you can redistribute it and/or modify
@ -49,10 +50,18 @@ extern int s3c2410_cpu_save(unsigned long *saveblk);
extern void s3c2410_cpu_suspend(void);
extern void s3c2410_cpu_resume(void);
extern unsigned long s3c2410_sleep_save_phys;
extern unsigned long s3c_sleep_save_phys;
/* sleep save info */
/**
* struct sleep_save - save information for shared peripherals.
* @reg: Pointer to the register to save.
* @val: Holder for the value saved from reg.
*
* This describes a list of registers which is used by the pm core and
* other subsystem to save and restore register values over suspend.
*/
struct sleep_save {
void __iomem *reg;
unsigned long val;
@ -61,8 +70,11 @@ struct sleep_save {
#define SAVE_ITEM(x) \
{ .reg = (x) }
extern void s3c2410_pm_do_save(struct sleep_save *ptr, int count);
extern void s3c2410_pm_do_restore(struct sleep_save *ptr, int count);
/* helper functions to save/restore lists of registers. */
extern void s3c_pm_do_save(struct sleep_save *ptr, int count);
extern void s3c_pm_do_restore(struct sleep_save *ptr, int count);
extern void s3c_pm_do_restore_core(struct sleep_save *ptr, int count);
#ifdef CONFIG_PM
extern int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state);
@ -71,3 +83,21 @@ extern int s3c24xx_irq_resume(struct sys_device *dev);
#define s3c24xx_irq_suspend NULL
#define s3c24xx_irq_resume NULL
#endif
/* PM debug functions */
#ifdef CONFIG_S3C2410_PM_DEBUG
/**
* s3c_pm_dbg() - low level debug function for use in suspend/resume.
* @msg: The message to print.
*
* This function is used mainly to debug the resume process before the system
* can rely on printk/console output. It uses the low-level debugging output
* routine printascii() to do its work.
*/
extern void s3c_pm_dbg(const char *msg, ...);
#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)
#else
#define S3C_PMDBG(fmt...) printk(KERN_DEBUG fmt)
#endif

97
arch/arm/plat-s3c/pm.c Normal file
View File

@ -0,0 +1,97 @@
/* linux/arch/arm/plat-s3c/pm.c
*
* Copyright 2008 Openmoko, Inc.
* Copyright 2004,2006,2008 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* S3C common power management (suspend to ram) support.
*
* 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/errno.h>
#include <linux/io.h>
#include <plat/pm.h>
/* for external use */
unsigned long s3c_pm_flags;
#ifdef CONFIG_S3C2410_PM_DEBUG
extern void printascii(const char *);
void s3c_pm_dbg(const char *fmt, ...)
{
va_list va;
char buff[256];
va_start(va, fmt);
vsprintf(buff, fmt, va);
va_end(va);
printascii(buff);
}
#endif /* CONFIG_S3C2410_PM_DEBUG */
/* helper functions to save and restore register state */
/**
* s3c_pm_do_save() - save a set of registers for restoration on resume.
* @ptr: Pointer to an array of registers.
* @count: Size of the ptr array.
*
* Run through the list of registers given, saving their contents in the
* array for later restoration when we wakeup.
*/
void s3c_pm_do_save(struct sleep_save *ptr, int count)
{
for (; count > 0; count--, ptr++) {
ptr->val = __raw_readl(ptr->reg);
S3C_PMDBG("saved %p value %08lx\n", ptr->reg, ptr->val);
}
}
/**
* s3c_pm_do_restore() - restore register values from the save list.
* @ptr: Pointer to an array of registers.
* @count: Size of the ptr array.
*
* Restore the register values saved from s3c_pm_do_save().
*
* Note, we do not use S3C_PMDBG() in here, as the system may not have
* restore the UARTs state yet
*/
void s3c_pm_do_restore(struct sleep_save *ptr, int count)
{
for (; count > 0; count--, ptr++) {
printk(KERN_DEBUG "restore %p (restore %08lx, was %08x)\n",
ptr->reg, ptr->val, __raw_readl(ptr->reg));
__raw_writel(ptr->val, ptr->reg);
}
}
/**
* s3c_pm_do_restore_core() - early restore register values from save list.
*
* This is similar to s3c_pm_do_restore() except we try and minimise the
* side effects of the function in case registers that hardware might need
* to work has been restored.
*
* WARNING: Do not put any debug in here that may effect memory or use
* peripherals, as things may be changing!
*/
void s3c_pm_do_restore_core(struct sleep_save *ptr, int count)
{
for (; count > 0; count--, ptr++)
__raw_writel(ptr->val, ptr->reg);
}

4
arch/arm/plat-s3c24xx/irq.c
View File

@ -616,7 +616,7 @@ int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state)
for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
save_eintflt[i] = __raw_readl(S3C24XX_EINFLT0 + (i*4));
s3c2410_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
save_eintmask = __raw_readl(S3C24XX_EINTMASK);
return 0;
@ -632,7 +632,7 @@ int s3c24xx_irq_resume(struct sys_device *dev)
for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
__raw_writel(save_eintflt[i], S3C24XX_EINFLT0 + (i*4));
s3c2410_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
__raw_writel(save_eintmask, S3C24XX_EINTMASK);
return 0;

113
arch/arm/plat-s3c24xx/pm.c
View File

@ -49,9 +49,6 @@
#include <plat/pm.h>
/* for external use */
unsigned long s3c_pm_flags;
#define PFX "s3c24xx-pm: "
@ -143,20 +140,6 @@ static struct sleep_save uart_save[] = {
* system never wakes up from the sleep
*/
extern void printascii(const char *);
void pm_dbg(const char *fmt, ...)
{
va_list va;
char buff[256];
va_start(va, fmt);
vsprintf(buff, fmt, va);
va_end(va);
printascii(buff);
}
static void s3c2410_pm_debug_init(void)
{
unsigned long tmp = __raw_readl(S3C2410_CLKCON);
@ -170,10 +153,7 @@ static void s3c2410_pm_debug_init(void)
udelay(10);
}
#define DBG(fmt...) pm_dbg(fmt)
#else
#define DBG(fmt...) printk(KERN_DEBUG fmt)
#define s3c2410_pm_debug_init() do { } while(0)
static struct sleep_save uart_save[] = {};
@ -211,7 +191,7 @@ static void s3c2410_pm_run_res(struct resource *ptr, run_fn_t fn, u32 *arg)
if ((ptr->flags & IORESOURCE_MEM) &&
strcmp(ptr->name, "System RAM") == 0) {
DBG("Found system RAM at %08lx..%08lx\n",
S3C_PMDBG("Found system RAM at %08lx..%08lx\n",
ptr->start, ptr->end);
arg = (fn)(ptr, arg);
}
@ -232,7 +212,7 @@ static u32 *s3c2410_pm_countram(struct resource *res, u32 *val)
size += CHECK_CHUNKSIZE-1;
size /= CHECK_CHUNKSIZE;
DBG("Area %08lx..%08lx, %d blocks\n", res->start, res->end, size);
S3C_PMDBG("Area %08lx..%08lx, %d blocks\n", res->start, res->end, size);
*val += size * sizeof(u32);
return val;
@ -252,7 +232,7 @@ static void s3c2410_pm_check_prepare(void)
s3c2410_pm_run_sysram(s3c2410_pm_countram, &crc_size);
DBG("s3c2410_pm_prepare_check: %u checks needed\n", crc_size);
S3C_PMDBG("s3c2410_pm_prepare_check: %u checks needed\n", crc_size);
crcs = kmalloc(crc_size+4, GFP_KERNEL);
if (crcs == NULL)
@ -308,7 +288,7 @@ static inline int in_region(void *ptr, int size, void *what, size_t whatsz)
static u32 *s3c2410_pm_runcheck(struct resource *res, u32 *val)
{
void *save_at = phys_to_virt(s3c2410_sleep_save_phys);
void *save_at = phys_to_virt(s3c_sleep_save_phys);
unsigned long addr;
unsigned long left;
void *ptr;
@ -324,12 +304,12 @@ static u32 *s3c2410_pm_runcheck(struct resource *res, u32 *val)
ptr = phys_to_virt(addr);
if (in_region(ptr, left, crcs, crc_size)) {
DBG("skipping %08lx, has crc block in\n", addr);
S3C_PMDBG("skipping %08lx, has crc block in\n", addr);
goto skip_check;
}
if (in_region(ptr, left, save_at, 32*4 )) {
DBG("skipping %08lx, has save block in\n", addr);
S3C_PMDBG("skipping %08lx, has save block in\n", addr);
goto skip_check;
}
@ -340,7 +320,7 @@ static u32 *s3c2410_pm_runcheck(struct resource *res, u32 *val)
printk(KERN_ERR PFX "Restore CRC error at "
"%08lx (%08x vs %08x)\n", addr, calc, *val);
DBG("Restore CRC error at %08lx (%08x vs %08x)\n",
S3C_PMDBG("Restore CRC error at %08lx (%08x vs %08x)\n",
addr, calc, *val);
}
@ -373,49 +353,6 @@ static void s3c2410_pm_check_restore(void)
#define s3c2410_pm_check_store() do { } while(0)
#endif
/* helper functions to save and restore register state */
void s3c2410_pm_do_save(struct sleep_save *ptr, int count)
{
for (; count > 0; count--, ptr++) {
ptr->val = __raw_readl(ptr->reg);
DBG("saved %p value %08lx\n", ptr->reg, ptr->val);
}
}
/* s3c2410_pm_do_restore
*
* restore the system from the given list of saved registers
*
* Note, we do not use DBG() in here, as the system may not have
* restore the UARTs state yet
*/
void s3c2410_pm_do_restore(struct sleep_save *ptr, int count)
{
for (; count > 0; count--, ptr++) {
printk(KERN_DEBUG "restore %p (restore %08lx, was %08x)\n",
ptr->reg, ptr->val, __raw_readl(ptr->reg));
__raw_writel(ptr->val, ptr->reg);
}
}
/* s3c2410_pm_do_restore_core
*
* similar to s3c2410_pm_do_restore_core
*
* WARNING: Do not put any debug in here that may effect memory or use
* peripherals, as things may be changing!
*/
static void s3c2410_pm_do_restore_core(struct sleep_save *ptr, int count)
{
for (; count > 0; count--, ptr++) {
__raw_writel(ptr->val, ptr->reg);
}
}
/* s3c2410_pm_show_resume_irqs
*
* print any IRQs asserted at resume time (ie, we woke from)
@ -430,7 +367,7 @@ static void s3c2410_pm_show_resume_irqs(int start, unsigned long which,
for (i = 0; i <= 31; i++) {
if ((which) & (1L<<i)) {
DBG("IRQ %d asserted at resume\n", start+i);
S3C_PMDBG("IRQ %d asserted at resume\n", start+i);
}
}
}
@ -456,10 +393,10 @@ static void s3c2410_pm_check_resume_pin(unsigned int pin, unsigned int irqoffs)
if (!irqstate) {
if (pinstate == S3C2410_GPIO_IRQ)
DBG("Leaving IRQ %d (pin %d) enabled\n", irq, pin);
S3C_PMDBG("Leaving IRQ %d (pin %d) enabled\n", irq, pin);
} else {
if (pinstate == S3C2410_GPIO_IRQ) {
DBG("Disabling IRQ %d (pin %d)\n", irq, pin);
S3C_PMDBG("Disabling IRQ %d (pin %d)\n", irq, pin);
s3c2410_gpio_cfgpin(pin, S3C2410_GPIO_INPUT);
}
}
@ -646,8 +583,8 @@ static void s3c2410_pm_restore_gpio(int index, struct gpio_sleep *gps)
__raw_writel(gps->gpup, base + OFFS_UP);
}
DBG("GPIO[%d] CON %08lx => %08lx, DAT %08lx => %08lx\n",
index, old_gpcon, gps_gpcon, old_gpdat, gps_gpdat);
S3C_PMDBG("GPIO[%d] CON %08lx => %08lx, DAT %08lx => %08lx\n",
index, old_gpcon, gps_gpcon, old_gpdat, gps_gpdat);
}
@ -684,7 +621,7 @@ static int s3c2410_pm_enter(suspend_state_t state)
s3c2410_pm_debug_init();
DBG("s3c2410_pm_enter(%d)\n", state);
S3C_PMDBG("s3c2410_pm_enter(%d)\n", state);
if (pm_cpu_prep == NULL || pm_cpu_sleep == NULL) {
printk(KERN_ERR PFX "error: no cpu sleep functions set\n");
@ -709,22 +646,22 @@ static int s3c2410_pm_enter(suspend_state_t state)
/* store the physical address of the register recovery block */
s3c2410_sleep_save_phys = virt_to_phys(regs_save);
s3c_sleep_save_phys = virt_to_phys(regs_save);
DBG("s3c2410_sleep_save_phys=0x%08lx\n", s3c2410_sleep_save_phys);
S3C_PMDBG("s3c_sleep_save_phys=0x%08lx\n", s3c_sleep_save_phys);
/* save all necessary core registers not covered by the drivers */
s3c2410_pm_save_gpios();
s3c2410_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
s3c2410_pm_do_save(core_save, ARRAY_SIZE(core_save));
s3c2410_pm_do_save(uart_save, ARRAY_SIZE(uart_save));
s3c_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
s3c_pm_do_save(core_save, ARRAY_SIZE(core_save));
s3c_pm_do_save(uart_save, ARRAY_SIZE(uart_save));
/* set the irq configuration for wake */
s3c2410_pm_configure_extint();
DBG("sleep: irq wakeup masks: %08lx,%08lx\n",
S3C_PMDBG("sleep: irq wakeup masks: %08lx,%08lx\n",
s3c_irqwake_intmask, s3c_irqwake_eintmask);
__raw_writel(s3c_irqwake_intmask, S3C2410_INTMSK);
@ -765,16 +702,16 @@ static int s3c2410_pm_enter(suspend_state_t state)
/* restore the system state */
s3c2410_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
s3c2410_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
s3c2410_pm_do_restore(uart_save, ARRAY_SIZE(uart_save));
s3c_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
s3c_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
s3c_pm_do_restore(uart_save, ARRAY_SIZE(uart_save));
s3c2410_pm_restore_gpios();
s3c2410_pm_debug_init();
/* check what irq (if any) restored the system */
DBG("post sleep: IRQs 0x%08x, 0x%08x\n",
S3C_PMDBG("post sleep: IRQs 0x%08x, 0x%08x\n",
__raw_readl(S3C2410_SRCPND),
__raw_readl(S3C2410_EINTPEND));
@ -784,13 +721,13 @@ static int s3c2410_pm_enter(suspend_state_t state)
s3c2410_pm_show_resume_irqs(IRQ_EINT4-4, __raw_readl(S3C2410_EINTPEND),
s3c_irqwake_eintmask);
DBG("post sleep, preparing to return\n");
S3C_PMDBG("post sleep, preparing to return\n");
s3c2410_pm_check_restore();
/* ok, let's return from sleep */
DBG("S3C2410 PM Resume (post-restore)\n");
S3C_PMDBG("S3C2410 PM Resume (post-restore)\n");
return 0;
}

4
arch/arm/plat-s3c24xx/s3c244x.c
View File

@ -145,13 +145,13 @@ static struct sleep_save s3c244x_sleep[] = {
static int s3c244x_suspend(struct sys_device *dev, pm_message_t state)
{
s3c2410_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
s3c_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
return 0;
}
static int s3c244x_resume(struct sys_device *dev)
{
s3c2410_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
s3c_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
return 0;
}

8
arch/arm/plat-s3c24xx/sleep.S
View File

@ -84,7 +84,7 @@ resume_with_mmu:
.ltorg
@@ the next bits sit in the .data segment, even though they
@@ happen to be code... the s3c2410_sleep_save_phys needs to be
@@ happen to be code... the s3c_sleep_save_phys needs to be
@@ accessed by the resume code before it can restore the MMU.
@@ This means that the variable has to be close enough for the
@@ code to read it... since the .text segment needs to be RO,
@ -92,8 +92,8 @@ resume_with_mmu:
.data
.global s3c2410_sleep_save_phys
s3c2410_sleep_save_phys:
.global s3c_sleep_save_phys
s3c_sleep_save_phys:
.word 0
@ -145,7 +145,7 @@ ENTRY(s3c2410_cpu_resume)
mcr p15, 0, r1, c8, c7, 0 @@ invalidate I & D TLBs
mcr p15, 0, r1, c7, c7, 0 @@ invalidate I & D caches
ldr r0, s3c2410_sleep_save_phys @ address of restore block
ldr r0, s3c_sleep_save_phys @ address of restore block
ldmia r0, { r4 - r13 }
mcr p15, 0, r4, c13, c0, 0 @ PID