#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>
#include <plat/pm.h>
-
#define PFX "s3c24xx-pm: "
static struct sleep_save core_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
*
}
}
-/* 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;
#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;
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
* 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;
}
}
-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));
}
+
projects / linux-2.6-omap-h63xx.git / blobdiff