static void config_sleep_gpio_tables(void)
{
int i;
for (i = nr_v1_sleep_gpio_table - 1; i >= 0; i--)
config_sleep_gpio(v1_sleep_gpio_tables[i].table,
v1_sleep_gpio_tables[i].arr_size);
}
static int s3c_pm_enter(suspend_state_t state)
{
static unsigned long regs_save[16];
unsigned int gpio;
/* 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;
}
/* 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 */
#if 0
/* control power of moviNAND at PM and add 700ms delay for stabilization of moviNAND. */
gpio = readl(S5PV210_GPJ2DAT);
writel(gpio & (~0x80), S5PV210_GPJ2DAT);
mdelay(700);
#endif
s3c_pm_save_gpios();
s3c_pm_save_uarts();
s3c_pm_save_core();
config_sleep_gpio();
/* 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();
/* clear wakeup_stat register for next wakeup reason */
__raw_writel(__raw_readl(S5P_WAKEUP_STAT), S5P_WAKEUP_STAT);
/* send the cpu to sleep... */
s3c_pm_arch_stop_clocks();
/* 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. */
pmstats->sleep_count++;
pmstats->sleep_freq = __raw_readl(S5P_CLK_DIV0);
s3c_cpu_save(regs_save);
pmstats->wake_count++;
pmstats->wake_freq = __raw_readl(S5P_CLK_DIV0);
/* restore the cpu state using the kernel's cpu init code. */
cpu_init();
fiq_glue_resume();
local_fiq_enable();
s3c_pm_restore_core();
s3c_pm_restore_uarts();
s3c_pm_restore_gpios();
s5pv210_restore_eint_group();
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;
}
