#define s3c_pm_check_restore() do { } while(0)
#define s3c_pm_check_store() do { } while(0)
#endif
+
+/**
+ * s3c_pm_configure_extint() - ensure pins are correctly set for IRQ
+ *
+ * Setup all the necessary GPIO pins for waking the system on external
+ * interrupt.
+ */
+extern void s3c_pm_configure_extint(void);
+
+/**
+ * s3c_pm_restore_gpios() - restore the state of the gpios after sleep.
+ *
+ * Restore the state of the GPIO pins after sleep, which may involve ensuring
+ * that we do not glitch the state of the pins from that the bootloader's
+ * resume code has done.
+*/
+extern void s3c_pm_restore_gpios(void);
+
+/**
+ * s3c_pm_save_gpios() - save the state of the GPIOs for restoring after sleep.
+ *
+ * Save the GPIO states for resotration on resume. See s3c_pm_restore_gpios().
+ */
+extern void s3c_pm_save_gpios(void);
+
+extern void s3c_pm_save_core(void);
+extern void s3c_pm_restore_core(void);
#include <linux/init.h>
#include <linux/suspend.h>
#include <linux/errno.h>
+#include <linux/delay.h>
+#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 <mach/regs-mem.h>
+#include <mach/regs-irq.h>
+
#include <plat/pm.h>
+#include <plat/pm-core.h>
/* for external use */
unsigned long s3c_pm_flags;
+/* Debug code:
+ *
+ * This code supports debug output to the low level UARTs for use on
+ * resume before the console layer is available.
+*/
+
#ifdef CONFIG_S3C2410_PM_DEBUG
extern void printascii(const char *);
printascii(buff);
}
+
+static inline void s3c_pm_debug_init(void)
+{
+ /* restart uart clocks so we can use them to output */
+ s3c_pm_debug_init_uart();
+}
+
+#else
+#define s3c_pm_debug_init() do { } while(0)
+
#endif /* CONFIG_S3C2410_PM_DEBUG */
+/* Save the UART configurations if we are configured for debug. */
+
+#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(S3C_VA_UART0),
+ SAVE_UART(S3C_VA_UART1),
+#ifndef CONFIG_CPU_S3C2400
+ SAVE_UART(S3C_VA_UART2),
+#endif
+};
+
+static void s3c_pm_save_uart(void)
+{
+ s3c_pm_do_save(uart_save, ARRAY_SIZE(uart_save));
+}
+
+static void s3c_pm_restore_uart(void)
+{
+ s3c_pm_do_restore(uart_save, ARRAY_SIZE(uart_save));
+}
+#else
+static void s3c_pm_save_uart(void) { }
+static void s3c_pm_restore_uart(void) { }
+#endif
+
/* helper functions to save and restore register state */
for (; count > 0; count--, ptr++)
__raw_writel(ptr->val, ptr->reg);
}
+
+/* s3c2410_pm_show_resume_irqs
+ *
+ * print any IRQs asserted at resume time (ie, we woke from)
+*/
+static void s3c_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);
+ }
+ }
+}
+
+
+void (*pm_cpu_prep)(void);
+void (*pm_cpu_sleep)(void);
+
+#define any_allowed(mask, allow) (((mask) & (allow)) != (allow))
+
+/* s3c_pm_enter
+ *
+ * central control for sleep/resume process
+*/
+
+static int s3c_pm_enter(suspend_state_t state)
+{
+ unsigned long regs_save[16];
+
+ /* 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;
+ }
+
+ /* 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 */
+
+ s3c_pm_save_gpios();
+ s3c_pm_save_uart();
+ 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();
+
+ /* 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 using the kernel's cpu init code. */
+
+ cpu_init();
+
+ /* restore the system state */
+
+ s3c_pm_restore_core();
+ s3c_pm_restore_uart();
+ s3c_pm_restore_gpios();
+
+ s3c_pm_debug_init();
+
+ /* check what irq (if any) restored the system */
+
+ s3c_pm_arch_show_resume_irqs();
+
+ S3C_PMDBG("%s: post sleep, preparing to return\n", __func__);
+
+ s3c_pm_check_restore();
+
+ /* ok, let's return from sleep */
+
+ S3C_PMDBG("S3C PM Resume (post-restore)\n");
+ return 0;
+}
+
+static struct platform_suspend_ops s3c_pm_ops = {
+ .enter = s3c_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)
+{
+ printk("S3C Power Management, Copyright 2004 Simtec Electronics\n");
+
+ suspend_set_ops(&s3c_pm_ops);
+ return 0;
+}
--- /dev/null
+/* linux/arch/arm/plat-s3c24xx/include/plat/pll.h
+ *
+ * Copyright 2008 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ * http://armlinux.simtec.co.uk/
+ *
+ * S3C24xx - PM core support for arch/arm/plat-s3c/pm.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+static inline void s3c_pm_debug_init_uart(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);
+}
+
+static inline void s3c_pm_arch_prepare_irqs(void)
+{
+ __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);
+
+}
+
+static inline void s3c_pm_arch_stop_clocks(void)
+{
+ __raw_writel(0x00, S3C2410_CLKCON); /* turn off clocks over sleep */
+}
+
+static void s3c_pm_show_resume_irqs(int start, unsigned long which,
+ unsigned long mask);
+
+static inline void s3c_pm_arch_show_resume_irqs(void)
+{
+ S3C_PMDBG("post sleep: IRQs 0x%08x, 0x%08x\n",
+ __raw_readl(S3C2410_SRCPND),
+ __raw_readl(S3C2410_EINTPEND));
+
+ s3c_pm_show_resume_irqs(IRQ_EINT0, __raw_readl(S3C2410_SRCPND),
+ s3c_irqwake_intmask);
+
+ s3c_pm_show_resume_irqs(IRQ_EINT4-4, __raw_readl(S3C2410_EINTPEND),
+ s3c_irqwake_eintmask);
+}
#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-beck.git / commitdiff