static int s3c6410_pm_wake(suspend_state_t state)
{
if (bml_resume_fp)
bml_resume_fp(NULL, 0);
return 0;
}
static int s3c6410_pm_enter(suspend_state_t state)
{
unsigned long regs_save[16];
unsigned int tmp;
unsigned int wakeup_stat = 0x0;
unsigned int eint0pend = 0x0;
/* ensure the debug is initialised (if enabled) */
DBG("s3c6410_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;
}
/* prepare check area if configured */
s3c6410_pm_check_prepare();
/* store the physical address of the register recovery block */
s3c6410_sleep_save_phys = virt_to_phys(regs_save);
DBG("s3c6410_sleep_save_phys=0x%08lx\n", s3c6410_sleep_save_phys);
/* save all necessary core registers not covered by the drivers */
s3c6410_pm_do_save(gpio_save, ARRAY_SIZE(gpio_save));
s3c6410_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
s3c6410_pm_do_save(core_save, ARRAY_SIZE(core_save));
s3c6410_pm_do_save(sromc_save, ARRAY_SIZE(sromc_save));
s3c6410_pm_do_save(onenand_save, ARRAY_SIZE(onenand_save));
s3c6410_pm_do_save(uart_save, ARRAY_SIZE(uart_save));
/* ensure INF_REG0 has the resume address */
__raw_writel(virt_to_phys(s3c6410_cpu_resume), S3C_INFORM0);
/* set the irq configuration for wake */
s3c6410_pm_configure_extint();
/* call cpu specific preperation */
pm_cpu_prep();
/* flush cache back to ram */
flush_cache_all();
s3c6410_pm_check_store();
s3c_config_sleep_gpio();
tmp = __raw_readl(S3C64XX_SPCONSLP);
tmp &= ~(0x3 << 12);
__raw_writel(tmp | (0x1 << 12), S3C64XX_SPCONSLP);
/* send the cpu to sleep... */
__raw_writel(0xffffffff, S3C64XX_VIC0INTENCLEAR);
__raw_writel(0xffffffff, S3C64XX_VIC1INTENCLEAR);
__raw_writel(0xffffffff, S3C64XX_VIC0SOFTINTCLEAR);
__raw_writel(0xffffffff, S3C64XX_VIC1SOFTINTCLEAR);
/* Unmask clock gating and block power turn on */
__raw_writel(0x43E00041, S3C_HCLK_GATE);
__raw_writel(0xF2040000, S3C_PCLK_GATE);
__raw_writel(0x80000011, S3C_SCLK_GATE);
__raw_writel(0x00000000, S3C_MEM0_CLK_GATE);
__raw_writel(0x1, S3C_OSC_STABLE);
__raw_writel(0x3, S3C_PWR_STABLE);
/* Set WFI instruction to SLEEP mode */
tmp = __raw_readl(S3C_PWR_CFG);
tmp &= ~(0x3<<5);
tmp |= (0x3<<5);
__raw_writel(tmp, S3C_PWR_CFG);
tmp = __raw_readl(S3C_SLEEP_CFG);
tmp &= ~(0x61<<0);
__raw_writel(tmp, S3C_SLEEP_CFG);
__raw_writel(0x2, S3C64XX_SLPEN);
/* Clear WAKEUP_STAT register for next wakeup -jc.lee */
/* If this register do not be cleared, Wakeup will be failed */
__raw_writel(__raw_readl(S3C_WAKEUP_STAT), S3C_WAKEUP_STAT);
/* s3c6410_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 (s3c6410_cpu_save(regs_save) == 0) {
flush_cache_all();
pm_cpu_sleep();
}
/* restore the cpu state */
cpu_init();
__raw_writel(s3c_eint_mask_val, S3C_EINT_MASK);
/* restore the system state */
s3c6410_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
s3c6410_pm_do_restore(sromc_save, ARRAY_SIZE(sromc_save));
s3c6410_pm_do_restore(gpio_save, ARRAY_SIZE(gpio_save));
s3c6410_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
s3c6410_pm_do_restore(onenand_save, ARRAY_SIZE(onenand_save));
s3c6410_pm_do_restore(uart_save, ARRAY_SIZE(uart_save));
__raw_writel(0x0, S3C64XX_SLPEN);
wakeup_stat = __raw_readl(S3C_WAKEUP_STAT);
eint0pend = __raw_readl(S3C64XX_EINT0PEND);
__raw_writel(eint0pend, S3C64XX_EINT0PEND);
DBG("post sleep, preparing to return\n");
s3c6410_pm_check_restore();
extra_eint0pend = eint0pend;
pr_info("%s: WAKEUP_STAT(0x%08x), EINT0PEND(0x%08x)\n",
__func__, wakeup_stat, eint0pend);
s3c_config_wakeup_gpio();
if (bml_resume_fp)
bml_resume_fp(NULL, 0);
/* ok, let's return from sleep */
DBG("S3C6410 PM Resume (post-restore)\n");
return 0;
}
