static int s3c_pm_enter(suspend_state_t state)
{
/* ensure the debug is initialised (if enabled) */
s3c_pm_debug_init();
S3C_PMDBG("%s(%d)\n", __func__, state);
if (pm_cpu_prep == NULL || pm_cpu_sleep == NULL) {
printk(KERN_ERR "%s: error: no cpu sleep function\n", __func__);
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 "%s: No wake-up sources!\n", __func__);
printk(KERN_ERR "%s: Aborting sleep\n", __func__);
return -EINVAL;
}
/* save all necessary core registers not covered by the drivers */
s3c_pm_save_gpios();
s3c_pm_saved_gpios();
s3c_pm_save_uarts();
s3c_pm_save_core();
/* set the irq configuration for wake */
s3c_pm_configure_extint();
S3C_PMDBG("sleep: irq wakeup masks: %08lx,%08lx\n",
s3c_irqwake_intmask, s3c_irqwake_eintmask);
s3c_pm_arch_prepare_irqs();
/* call cpu specific preparation */
pm_cpu_prep();
/* flush cache back to ram */
flush_cache_all();
s3c_pm_check_store();
/* send the cpu to sleep... */
s3c_pm_arch_stop_clocks();
printk(KERN_ALERT "PM: SLEEP\n");
/* s3c_cpu_save will also act as our return point from when
* we resume as it saves its own register state and restores it
* during the resume. */
s3c_cpu_save(0, PLAT_PHYS_OFFSET - PAGE_OFFSET);
/* restore the cpu state using the kernel's cpu init code. */
cpu_init();
s3c_pm_restore_core();
s3c_pm_restore_uarts();
s3c_pm_restore_gpios();
s3c_pm_restored_gpios();
s3c_pm_debug_init();
/* restore the system state */
if (pm_cpu_restore)
pm_cpu_restore();
/* check what irq (if any) restored the system */
s3c_pm_arch_show_resume_irqs();
S3C_PMDBG("%s: post sleep, preparing to return\n", __func__);
/* LEDs should now be 1110 */
s3c_pm_debug_smdkled(1 << 1, 0);
s3c_pm_check_restore();
/* ok, let's return from sleep */
S3C_PMDBG("S3C PM Resume (post-restore)\n");
return 0;
}
static int s3c_pm_enter(suspend_state_t state)
{
/* ensure the debug is initialised (if enabled) */
s3c_pm_debug_init();
S3C_PMDBG("%s(%d)\n", __func__, state);
if (pm_cpu_prep == NULL || pm_cpu_sleep == NULL) {
printk(KERN_ERR "%s: error: no cpu sleep function\n", __func__);
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 "%s: No wake-up sources!\n", __func__);
printk(KERN_ERR "%s: Aborting sleep\n", __func__);
return -EINVAL;
}
if (pm_check_eint_pend) {
u32 pending_eint = pm_check_eint_pend();
if (pending_eint) {
pr_warn("%s: Aborting sleep, EINT PENDING(0x%08x)\n",
__func__, pending_eint);
return -EBUSY;
}
}
/* save all necessary core registers not covered by the drivers */
s3c_pm_save_gpios();
s3c_pm_saved_gpios();
s3c_pm_save_uarts();
s3c_pm_save_core();
/* set the irq configuration for wake */
s3c_pm_configure_extint();
S3C_PMDBG("sleep: irq wakeup masks: %08lx,%08lx\n",
s3c_irqwake_intmask, s3c_irqwake_eintmask);
s3c_pm_arch_prepare_irqs();
/* call cpu specific preparation */
pm_cpu_prep();
/* flush cache back to ram */
flush_cache_all();
s3c_pm_check_store();
#ifdef CONFIG_FAST_BOOT
if (fake_shut_down) {
/* Masking external wake up source
* only enable power key, FUEL ALERT, AP/IF PMIC IRQ */
__raw_writel(0xff77df7f, S5P_EINT_WAKEUP_MASK);
/* disable all system int */
__raw_writel(0xffffffff, S5P_WAKEUP_MASK);
}
#endif
/* send the cpu to sleep... */
s3c_pm_arch_stop_clocks();
printk(KERN_ALERT "PM: SLEEP\n");
/* s3c_cpu_save will also act as our return point from when
* we resume as it saves its own register state and restores it
* during the resume. */
printk(KERN_ALERT "ARM_COREx_STATUS CORE1[0x%08x], CORE2[0x%08x], CORE3[0x%08x]\n",
__raw_readl(S5P_VA_PMU + 0x2084),
__raw_readl(S5P_VA_PMU + 0x2104),
__raw_readl(S5P_VA_PMU + 0x2184));
s3c_cpu_save(0, PLAT_PHYS_OFFSET - PAGE_OFFSET);
/* restore the cpu state using the kernel's cpu init code. */
cpu_init();
#ifdef CONFIG_FAST_BOOT
fake_shut_down = false;
#endif
s3c_pm_restore_core();
s3c_pm_restore_uarts();
s3c_pm_restore_gpios();
s3c_pm_restored_gpios();
s3c_pm_debug_init();
/* restore the system state */
if (pm_cpu_restore)
pm_cpu_restore();
/* check what irq (if any) restored the system */
s3c_pm_arch_show_resume_irqs();
S3C_PMDBG("%s: post sleep, preparing to return\n", __func__);
/* LEDs should now be 1110 */
s3c_pm_debug_smdkled(1 << 1, 0);
s3c_pm_check_restore();
/* ok, let's return from sleep */
S3C_PMDBG("S3C PM Resume (post-restore)\n");
#ifdef CONFIG_SLP_WAKEUP_COUNT
wakeup_state = 1;
wakeup_counter = wakeup_counter + 1;
#endif
return 0;
}