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[ARM] S3C: Move plat-s3c24xx pm.c support into plat-s3c

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Move parts of the core and debug suspend code into the
plat-s3c for use with the new s3c64xx code.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks
2008-12-12 00:24:08 +00:00
parent 549c7e33ae
commit 2261e0e6e3
4 changed files with 311 additions and 210 deletions
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224
arch/arm/plat-s3c24xx/pm.c
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@@ -34,9 +34,6 @@
#include <linux/serial_core.h>
#include <linux/io.h>
#include <asm/cacheflush.h>
#include <mach/hardware.h>
#include <plat/regs-serial.h>
#include <mach/regs-clock.h>
#include <mach/regs-gpio.h>
@@ -47,7 +44,6 @@
#include <plat/pm.h>
#define PFX "s3c24xx-pm: "
static struct sleep_save core_save[] = {
@@ -115,66 +111,6 @@ static struct sleep_save misc_save[] = {
SAVE_ITEM(S3C2410_DCLKCON),
};
#ifdef CONFIG_S3C2410_PM_DEBUG
#define SAVE_UART(va) \
SAVE_ITEM((va) + S3C2410_ULCON), \
SAVE_ITEM((va) + S3C2410_UCON), \
SAVE_ITEM((va) + S3C2410_UFCON), \
SAVE_ITEM((va) + S3C2410_UMCON), \
SAVE_ITEM((va) + S3C2410_UBRDIV)
static struct sleep_save uart_save[] = {
SAVE_UART(S3C24XX_VA_UART0),
SAVE_UART(S3C24XX_VA_UART1),
#ifndef CONFIG_CPU_S3C2400
SAVE_UART(S3C24XX_VA_UART2),
#endif
};
/* debug
*
* we send the debug to printascii() to allow it to be seen if the
* system never wakes up from the sleep
*/
static void s3c2410_pm_debug_init(void)
{
unsigned long tmp = __raw_readl(S3C2410_CLKCON);
/* re-start uart clocks */
tmp |= S3C2410_CLKCON_UART0;
tmp |= S3C2410_CLKCON_UART1;
tmp |= S3C2410_CLKCON_UART2;
__raw_writel(tmp, S3C2410_CLKCON);
udelay(10);
}
#else
#define s3c2410_pm_debug_init() do { } while(0)
static struct sleep_save uart_save[] = {};
#endif
/* s3c2410_pm_show_resume_irqs
*
* print any IRQs asserted at resume time (ie, we woke from)
*/
static void s3c2410_pm_show_resume_irqs(int start, unsigned long which,
unsigned long mask)
{
int i;
which &= ~mask;
for (i = 0; i <= 31; i++) {
if ((which) & (1L<<i)) {
S3C_PMDBG("IRQ %d asserted at resume\n", start+i);
}
}
}
/* s3c_pm_check_resume_pin
*
@@ -206,12 +142,12 @@ static void s3c_pm_check_resume_pin(unsigned int pin, unsigned int irqoffs)
}
}
/* s3c2410_pm_configure_extint
/* s3c_pm_configure_extint
*
* configure all external interrupt pins
*/
static void s3c2410_pm_configure_extint(void)
void s3c_pm_configure_extint(void)
{
int pin;
@@ -235,12 +171,12 @@ static void s3c2410_pm_configure_extint(void)
#define OFFS_DAT (S3C2410_GPADAT - S3C2410_GPACON)
#define OFFS_UP (S3C2410_GPBUP - S3C2410_GPBCON)
/* s3c2410_pm_save_gpios()
/* s3c_pm_save_gpios()
*
* Save the state of the GPIOs
*/
static void s3c2410_pm_save_gpios(void)
void s3c_pm_save_gpios(void)
{
struct gpio_sleep *gps = gpio_save;
unsigned int gpio;
@@ -279,7 +215,10 @@ static inline int is_out(unsigned long con)
return con == 1;
}
/* s3c2410_pm_restore_gpio()
/**
* s3c2410_pm_restore_gpio() - restore the given GPIO bank
* @index: The number of the GPIO bank being resumed.
* @gps: The sleep confgiuration for the bank.
*
* Restore one of the GPIO banks that was saved during suspend. This is
* not as simple as once thought, due to the possibility of glitches
@@ -397,7 +336,7 @@ static void s3c2410_pm_restore_gpio(int index, struct gpio_sleep *gps)
* Restore the state of the GPIOs
*/
static void s3c2410_pm_restore_gpios(void)
void s3c_pm_restore_gpios(void)
{
struct gpio_sleep *gps = gpio_save;
int gpio;
@@ -407,150 +346,15 @@ static void s3c2410_pm_restore_gpios(void)
}
}
void (*pm_cpu_prep)(void);
void (*pm_cpu_sleep)(void);
#define any_allowed(mask, allow) (((mask) & (allow)) != (allow))
/* s3c2410_pm_enter
*
* central control for sleep/resume process
*/
static int s3c2410_pm_enter(suspend_state_t state)
void s3c_pm_restore_core(void)
{
unsigned long regs_save[16];
/* ensure the debug is initialised (if enabled) */
s3c2410_pm_debug_init();
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");
return -EINVAL;
}
/* check if we have anything to wake-up with... bad things seem
* to happen if you suspend with no wakeup (system will often
* require a full power-cycle)
*/
if (!any_allowed(s3c_irqwake_intmask, s3c_irqwake_intallow) &&
!any_allowed(s3c_irqwake_eintmask, s3c_irqwake_eintallow)) {
printk(KERN_ERR PFX "No sources enabled for wake-up!\n");
printk(KERN_ERR PFX "Aborting sleep\n");
return -EINVAL;
}
/* prepare check area if configured */
s3c_pm_check_prepare();
/* store the physical address of the register recovery block */
s3c_sleep_save_phys = virt_to_phys(regs_save);
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();
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();
S3C_PMDBG("sleep: irq wakeup masks: %08lx,%08lx\n",
s3c_irqwake_intmask, s3c_irqwake_eintmask);
__raw_writel(s3c_irqwake_intmask, S3C2410_INTMSK);
__raw_writel(s3c_irqwake_eintmask, S3C2410_EINTMASK);
/* ack any outstanding external interrupts before we go to sleep */
__raw_writel(__raw_readl(S3C2410_EINTPEND), S3C2410_EINTPEND);
__raw_writel(__raw_readl(S3C2410_INTPND), S3C2410_INTPND);
__raw_writel(__raw_readl(S3C2410_SRCPND), S3C2410_SRCPND);
/* call cpu specific preparation */
pm_cpu_prep();
/* flush cache back to ram */
flush_cache_all();
s3c_pm_check_store();
/* send the cpu to sleep... */
__raw_writel(0x00, S3C2410_CLKCON); /* turn off clocks over sleep */
/* s3c2410_cpu_save will also act as our return point from when
* we resume as it saves its own register state, so use the return
* code to differentiate return from save and return from sleep */
if (s3c2410_cpu_save(regs_save) == 0) {
flush_cache_all();
pm_cpu_sleep();
}
/* restore the cpu state */
cpu_init();
/* restore the system state */
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 */
S3C_PMDBG("post sleep: IRQs 0x%08x, 0x%08x\n",
__raw_readl(S3C2410_SRCPND),
__raw_readl(S3C2410_EINTPEND));
s3c2410_pm_show_resume_irqs(IRQ_EINT0, __raw_readl(S3C2410_SRCPND),
s3c_irqwake_intmask);
s3c2410_pm_show_resume_irqs(IRQ_EINT4-4, __raw_readl(S3C2410_EINTPEND),
s3c_irqwake_eintmask);
S3C_PMDBG("post sleep, preparing to return\n");
s3c_pm_check_restore();
/* ok, let's return from sleep */
S3C_PMDBG("S3C2410 PM Resume (post-restore)\n");
return 0;
}
static struct platform_suspend_ops s3c2410_pm_ops = {
.enter = s3c2410_pm_enter,
.valid = suspend_valid_only_mem,
};
/* s3c2410_pm_init
*
* Attach the power management functions. This should be called
* from the board specific initialisation if the board supports
* it.
*/
int __init s3c2410_pm_init(void)
void s3c_pm_save_core(void)
{
printk("S3C2410 Power Management, (c) 2004 Simtec Electronics\n");
suspend_set_ops(&s3c2410_pm_ops);
return 0;
s3c_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
s3c_pm_do_save(core_save, ARRAY_SIZE(core_save));
}