Example #1
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;
	}

	/* 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;
}
Example #2
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;
}