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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2009-03-26 22:44:43 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-03-26 22:44:43 +0000
commitf5f0e17a8475dee913f362510e6a8ab987d27b9f (patch)
treeebe44e7774400730f6c15cd5a84187113c274e3d
parent2f3ec501ba1e1a68ab9d413f143bdc8f46417fc1 (diff)
parentfff94cd9f5527bbba13aa5ea5719d16531ca8e65 (diff)
downloadop-kernel-dev-f5f0e17a8475dee913f362510e6a8ab987d27b9f.zip
op-kernel-dev-f5f0e17a8475dee913f362510e6a8ab987d27b9f.tar.gz
Merge branch 'next-s3c-pm' of git://aeryn.fluff.org.uk/bjdooks/linux into devel
-rw-r--r--Documentation/arm/Samsung-S3C24XX/Suspend.txt8
-rw-r--r--arch/arm/mach-s3c2410/include/mach/gpio-nrs.h23
-rw-r--r--arch/arm/mach-s3c2410/include/mach/gpio.h3
-rw-r--r--arch/arm/mach-s3c2410/include/mach/irqs.h2
-rw-r--r--arch/arm/mach-s3c2410/include/mach/regs-gpio.h11
-rw-r--r--arch/arm/mach-s3c2410/mach-h1940.c2
-rw-r--r--arch/arm/mach-s3c2410/mach-qt2410.c2
-rw-r--r--arch/arm/mach-s3c2410/pm.c13
-rw-r--r--arch/arm/mach-s3c2412/mach-jive.c4
-rw-r--r--arch/arm/mach-s3c2412/pm.c4
-rw-r--r--arch/arm/mach-s3c2440/mach-rx3715.c2
-rw-r--r--arch/arm/mach-s3c24a0/include/mach/irqs.h2
-rw-r--r--arch/arm/plat-s3c/Makefile5
-rw-r--r--arch/arm/plat-s3c/include/plat/pm.h174
-rw-r--r--arch/arm/plat-s3c/pm-check.c242
-rw-r--r--arch/arm/plat-s3c/pm.c363
-rw-r--r--arch/arm/plat-s3c24xx/Makefile1
-rw-r--r--arch/arm/plat-s3c24xx/common-smdk.c2
-rw-r--r--arch/arm/plat-s3c24xx/include/plat/irq.h6
-rw-r--r--arch/arm/plat-s3c24xx/include/plat/map.h2
-rw-r--r--arch/arm/plat-s3c24xx/include/plat/pm-core.h59
-rw-r--r--arch/arm/plat-s3c24xx/include/plat/pm.h73
-rw-r--r--arch/arm/plat-s3c24xx/irq-pm.c95
-rw-r--r--arch/arm/plat-s3c24xx/irq.c152
-rw-r--r--arch/arm/plat-s3c24xx/pm-simtec.c2
-rw-r--r--arch/arm/plat-s3c24xx/pm.c503
-rw-r--r--arch/arm/plat-s3c24xx/s3c244x.c4
-rw-r--r--arch/arm/plat-s3c24xx/sleep.S43
28 files changed, 1038 insertions, 764 deletions
diff --git a/Documentation/arm/Samsung-S3C24XX/Suspend.txt b/Documentation/arm/Samsung-S3C24XX/Suspend.txt
index 0dab6e3..a30fe51 100644
--- a/Documentation/arm/Samsung-S3C24XX/Suspend.txt
+++ b/Documentation/arm/Samsung-S3C24XX/Suspend.txt
@@ -40,13 +40,13 @@ Resuming
Machine Support
---------------
- The machine specific functions must call the s3c2410_pm_init() function
+ The machine specific functions must call the s3c_pm_init() function
to say that its bootloader is capable of resuming. This can be as
simple as adding the following to the machine's definition:
- INITMACHINE(s3c2410_pm_init)
+ INITMACHINE(s3c_pm_init)
- A board can do its own setup before calling s3c2410_pm_init, if it
+ A board can do its own setup before calling s3c_pm_init, if it
needs to setup anything else for power management support.
There is currently no support for over-riding the default method of
@@ -74,7 +74,7 @@ statuc void __init machine_init(void)
enable_irq_wake(IRQ_EINT0);
- s3c2410_pm_init();
+ s3c_pm_init();
}
diff --git a/arch/arm/mach-s3c2410/include/mach/gpio-nrs.h b/arch/arm/mach-s3c2410/include/mach/gpio-nrs.h
new file mode 100644
index 0000000..ce1ec69
--- /dev/null
+++ b/arch/arm/mach-s3c2410/include/mach/gpio-nrs.h
@@ -0,0 +1,23 @@
+/* arch/arm/mach-s3c2410/include/mach/gpio-nrs.h
+ *
+ * Copyright (c) 2008 Simtec Electronics
+ * http://armlinux.simtec.co.uk/
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2410 - GPIO bank numbering
+ *
+ * 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.
+*/
+
+#define S3C2410_GPIONO(bank,offset) ((bank) + (offset))
+
+#define S3C2410_GPIO_BANKA (32*0)
+#define S3C2410_GPIO_BANKB (32*1)
+#define S3C2410_GPIO_BANKC (32*2)
+#define S3C2410_GPIO_BANKD (32*3)
+#define S3C2410_GPIO_BANKE (32*4)
+#define S3C2410_GPIO_BANKF (32*5)
+#define S3C2410_GPIO_BANKG (32*6)
+#define S3C2410_GPIO_BANKH (32*7)
diff --git a/arch/arm/mach-s3c2410/include/mach/gpio.h b/arch/arm/mach-s3c2410/include/mach/gpio.h
index 00476a5..51a88cf 100644
--- a/arch/arm/mach-s3c2410/include/mach/gpio.h
+++ b/arch/arm/mach-s3c2410/include/mach/gpio.h
@@ -23,3 +23,6 @@
#define ARCH_NR_GPIOS (256 + CONFIG_S3C24XX_GPIO_EXTRA)
#include <asm-generic/gpio.h>
+#include <mach/gpio-nrs.h>
+
+#define S3C_GPIO_END (S3C2410_GPIO_BANKH + 32)
diff --git a/arch/arm/mach-s3c2410/include/mach/irqs.h b/arch/arm/mach-s3c2410/include/mach/irqs.h
index 49efce8..2a2384f 100644
--- a/arch/arm/mach-s3c2410/include/mach/irqs.h
+++ b/arch/arm/mach-s3c2410/include/mach/irqs.h
@@ -80,7 +80,7 @@
#define IRQ_EINT22 S3C2410_IRQ(50)
#define IRQ_EINT23 S3C2410_IRQ(51)
-
+#define IRQ_EINT_BIT(x) ((x) - IRQ_EINT4 + 4)
#define IRQ_EINT(x) (((x) >= 4) ? (IRQ_EINT4 + (x) - 4) : (IRQ_EINT0 + (x)))
#define IRQ_LCD_FIFO S3C2410_IRQ(52)
diff --git a/arch/arm/mach-s3c2410/include/mach/regs-gpio.h b/arch/arm/mach-s3c2410/include/mach/regs-gpio.h
index 3210776..35a03df 100644
--- a/arch/arm/mach-s3c2410/include/mach/regs-gpio.h
+++ b/arch/arm/mach-s3c2410/include/mach/regs-gpio.h
@@ -14,16 +14,7 @@
#ifndef __ASM_ARCH_REGS_GPIO_H
#define __ASM_ARCH_REGS_GPIO_H
-#define S3C2410_GPIONO(bank,offset) ((bank) + (offset))
-
-#define S3C2410_GPIO_BANKA (32*0)
-#define S3C2410_GPIO_BANKB (32*1)
-#define S3C2410_GPIO_BANKC (32*2)
-#define S3C2410_GPIO_BANKD (32*3)
-#define S3C2410_GPIO_BANKE (32*4)
-#define S3C2410_GPIO_BANKF (32*5)
-#define S3C2410_GPIO_BANKG (32*6)
-#define S3C2410_GPIO_BANKH (32*7)
+#include <mach/gpio-nrs.h>
#ifdef CONFIG_CPU_S3C2400
#define S3C24XX_GPIO_BASE(x) S3C2400_GPIO_BASE(x)
diff --git a/arch/arm/mach-s3c2410/mach-h1940.c b/arch/arm/mach-s3c2410/mach-h1940.c
index 821a166..7a7c4da 100644
--- a/arch/arm/mach-s3c2410/mach-h1940.c
+++ b/arch/arm/mach-s3c2410/mach-h1940.c
@@ -203,7 +203,7 @@ static void __init h1940_map_io(void)
#ifdef CONFIG_PM_H1940
memcpy(phys_to_virt(H1940_SUSPEND_RESUMEAT), h1940_pm_return, 1024);
#endif
- s3c2410_pm_init();
+ s3c_pm_init();
}
static void __init h1940_init_irq(void)
diff --git a/arch/arm/mach-s3c2410/mach-qt2410.c b/arch/arm/mach-s3c2410/mach-qt2410.c
index 9678a53..9f1ba9b 100644
--- a/arch/arm/mach-s3c2410/mach-qt2410.c
+++ b/arch/arm/mach-s3c2410/mach-qt2410.c
@@ -355,7 +355,7 @@ static void __init qt2410_machine_init(void)
s3c2410_gpio_cfgpin(S3C2410_GPB5, S3C2410_GPIO_OUTPUT);
platform_add_devices(qt2410_devices, ARRAY_SIZE(qt2410_devices));
- s3c2410_pm_init();
+ s3c_pm_init();
}
MACHINE_START(QT2410, "QT2410")
diff --git a/arch/arm/mach-s3c2410/pm.c b/arch/arm/mach-s3c2410/pm.c
index a6970f6..87fc481 100644
--- a/arch/arm/mach-s3c2410/pm.c
+++ b/arch/arm/mach-s3c2410/pm.c
@@ -37,21 +37,14 @@
#include <plat/cpu.h>
#include <plat/pm.h>
-#ifdef CONFIG_S3C2410_PM_DEBUG
-extern void pm_dbg(const char *fmt, ...);
-#define DBG(fmt...) pm_dbg(fmt)
-#else
-#define DBG(fmt...) printk(KERN_DEBUG fmt)
-#endif
-
static void s3c2410_pm_prepare(void)
{
/* ensure at least GSTATUS3 has the resume address */
- __raw_writel(virt_to_phys(s3c2410_cpu_resume), S3C2410_GSTATUS3);
+ __raw_writel(virt_to_phys(s3c_cpu_resume), S3C2410_GSTATUS3);
- DBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3));
- DBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4));
+ S3C_PMDBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3));
+ S3C_PMDBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4));
if (machine_is_h1940()) {
void *base = phys_to_virt(H1940_SUSPEND_CHECK);
diff --git a/arch/arm/mach-s3c2412/mach-jive.c b/arch/arm/mach-s3c2412/mach-jive.c
index ecddbbb..72c266a 100644
--- a/arch/arm/mach-s3c2412/mach-jive.c
+++ b/arch/arm/mach-s3c2412/mach-jive.c
@@ -494,7 +494,7 @@ static int jive_pm_suspend(struct sys_device *sd, pm_message_t state)
* correct address to resume from. */
__raw_writel(0x2BED, S3C2412_INFORM0);
- __raw_writel(virt_to_phys(s3c2410_cpu_resume), S3C2412_INFORM1);
+ __raw_writel(virt_to_phys(s3c_cpu_resume), S3C2412_INFORM1);
return 0;
}
@@ -630,7 +630,7 @@ static void __init jive_machine_init(void)
/* initialise the power management now we've setup everything. */
- s3c2410_pm_init();
+ s3c_pm_init();
s3c_device_nand.dev.platform_data = &jive_nand_info;
diff --git a/arch/arm/mach-s3c2412/pm.c b/arch/arm/mach-s3c2412/pm.c
index 217e9e4..c9cfe40 100644
--- a/arch/arm/mach-s3c2412/pm.c
+++ b/arch/arm/mach-s3c2412/pm.c
@@ -85,7 +85,7 @@ static struct sleep_save s3c2412_sleep[] = {
static int s3c2412_pm_suspend(struct sys_device *dev, pm_message_t state)
{
- s3c2410_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
+ s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
return 0;
}
@@ -98,7 +98,7 @@ static int s3c2412_pm_resume(struct sys_device *dev)
tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
__raw_writel(tmp, S3C2412_PWRCFG);
- s3c2410_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
+ s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
return 0;
}
diff --git a/arch/arm/mach-s3c2440/mach-rx3715.c b/arch/arm/mach-s3c2440/mach-rx3715.c
index 12d378f..bc8d8d1 100644
--- a/arch/arm/mach-s3c2440/mach-rx3715.c
+++ b/arch/arm/mach-s3c2440/mach-rx3715.c
@@ -203,7 +203,7 @@ static void __init rx3715_init_machine(void)
#ifdef CONFIG_PM_H1940
memcpy(phys_to_virt(H1940_SUSPEND_RESUMEAT), h1940_pm_return, 1024);
#endif
- s3c2410_pm_init();
+ s3c_pm_init();
s3c24xx_fb_set_platdata(&rx3715_fb_info);
platform_add_devices(rx3715_devices, ARRAY_SIZE(rx3715_devices));
diff --git a/arch/arm/mach-s3c24a0/include/mach/irqs.h b/arch/arm/mach-s3c24a0/include/mach/irqs.h
index ae8c0e3..83ce2a7 100644
--- a/arch/arm/mach-s3c24a0/include/mach/irqs.h
+++ b/arch/arm/mach-s3c24a0/include/mach/irqs.h
@@ -70,6 +70,8 @@
#define IRQ_EINT17 S3C2410_IRQ(49)
#define IRQ_EINT18 S3C2410_IRQ(50)
+#define IRQ_EINT_BIT(x) ((x) - IRQ_EINT00)
+
/* SUB IRQS */
#define IRQ_S3CUART_RX0 S3C2410_IRQ(51) /* 67 */
#define IRQ_S3CUART_TX0 S3C2410_IRQ(52)
diff --git a/arch/arm/plat-s3c/Makefile b/arch/arm/plat-s3c/Makefile
index 39195f9..8d7815d 100644
--- a/arch/arm/plat-s3c/Makefile
+++ b/arch/arm/plat-s3c/Makefile
@@ -18,6 +18,11 @@ obj-y += pwm-clock.o
obj-y += gpio.o
obj-y += gpio-config.o
+# PM support
+
+obj-$(CONFIG_PM) += pm.o
+obj-$(CONFIG_S3C2410_PM_CHECK) += pm-check.o
+
# devices
obj-$(CONFIG_S3C_DEV_HSMMC) += dev-hsmmc.o
diff --git a/arch/arm/plat-s3c/include/plat/pm.h b/arch/arm/plat-s3c/include/plat/pm.h
new file mode 100644
index 0000000..3779775
--- /dev/null
+++ b/arch/arm/plat-s3c/include/plat/pm.h
@@ -0,0 +1,174 @@
+/* linux/include/asm-arm/plat-s3c24xx/pm.h
+ *
+ * Copyright (c) 2004 Simtec Electronics
+ * http://armlinux.simtec.co.uk/
+ * Written by Ben Dooks, <ben@simtec.co.uk>
+ *
+ * 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.
+*/
+
+/* s3c_pm_init
+ *
+ * called from board at initialisation time to setup the power
+ * management
+*/
+
+#ifdef CONFIG_PM
+
+extern __init int s3c_pm_init(void);
+
+#else
+
+static inline int s3c_pm_init(void)
+{
+ return 0;
+}
+#endif
+
+/* configuration for the IRQ mask over sleep */
+extern unsigned long s3c_irqwake_intmask;
+extern unsigned long s3c_irqwake_eintmask;
+
+/* IRQ masks for IRQs allowed to go to sleep (see irq.c) */
+extern unsigned long s3c_irqwake_intallow;
+extern unsigned long s3c_irqwake_eintallow;
+
+/* per-cpu sleep functions */
+
+extern void (*pm_cpu_prep)(void);
+extern void (*pm_cpu_sleep)(void);
+
+/* Flags for PM Control */
+
+extern unsigned long s3c_pm_flags;
+
+/* from sleep.S */
+
+extern int s3c_cpu_save(unsigned long *saveblk);
+extern void s3c_cpu_resume(void);
+
+extern void s3c2410_cpu_suspend(void);
+
+extern unsigned long s3c_sleep_save_phys;
+
+/* sleep save info */
+
+/**
+ * struct sleep_save - save information for shared peripherals.
+ * @reg: Pointer to the register to save.
+ * @val: Holder for the value saved from reg.
+ *
+ * This describes a list of registers which is used by the pm core and
+ * other subsystem to save and restore register values over suspend.
+ */
+struct sleep_save {
+ void __iomem *reg;
+ unsigned long val;
+};
+
+#define SAVE_ITEM(x) \
+ { .reg = (x) }
+
+/**
+ * struct pm_uart_save - save block for core UART
+ * @ulcon: Save value for S3C2410_ULCON
+ * @ucon: Save value for S3C2410_UCON
+ * @ufcon: Save value for S3C2410_UFCON
+ * @umcon: Save value for S3C2410_UMCON
+ * @ubrdiv: Save value for S3C2410_UBRDIV
+ *
+ * Save block for UART registers to be held over sleep and restored if they
+ * are needed (say by debug).
+*/
+struct pm_uart_save {
+ u32 ulcon;
+ u32 ucon;
+ u32 ufcon;
+ u32 umcon;
+ u32 ubrdiv;
+};
+
+/* helper functions to save/restore lists of registers. */
+
+extern void s3c_pm_do_save(struct sleep_save *ptr, int count);
+extern void s3c_pm_do_restore(struct sleep_save *ptr, int count);
+extern void s3c_pm_do_restore_core(struct sleep_save *ptr, int count);
+
+#ifdef CONFIG_PM
+extern int s3c_irqext_wake(unsigned int irqno, unsigned int state);
+extern int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state);
+extern int s3c24xx_irq_resume(struct sys_device *dev);
+#else
+#define s3c_irqext_wake NULL
+#define s3c24xx_irq_suspend NULL
+#define s3c24xx_irq_resume NULL
+#endif
+
+/* PM debug functions */
+
+#ifdef CONFIG_S3C2410_PM_DEBUG
+/**
+ * s3c_pm_dbg() - low level debug function for use in suspend/resume.
+ * @msg: The message to print.
+ *
+ * This function is used mainly to debug the resume process before the system
+ * can rely on printk/console output. It uses the low-level debugging output
+ * routine printascii() to do its work.
+ */
+extern void s3c_pm_dbg(const char *msg, ...);
+
+#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)
+#else
+#define S3C_PMDBG(fmt...) printk(KERN_DEBUG fmt)
+#endif
+
+/* suspend memory checking */
+
+#ifdef CONFIG_S3C2410_PM_CHECK
+extern void s3c_pm_check_prepare(void);
+extern void s3c_pm_check_restore(void);
+extern void s3c_pm_check_cleanup(void);
+extern void s3c_pm_check_store(void);
+#else
+#define s3c_pm_check_prepare() do { } while(0)
+#define s3c_pm_check_restore() do { } while(0)
+#define s3c_pm_check_cleanup() 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);
+
+/**
+ * s3c_pm_cb_flushcache - callback for assembly code
+ *
+ * Callback to issue flush_cache_all() as this call is
+ * not a directly callable object.
+ */
+extern void s3c_pm_cb_flushcache(void);
+
+extern void s3c_pm_save_core(void);
+extern void s3c_pm_restore_core(void);
diff --git a/arch/arm/plat-s3c/pm-check.c b/arch/arm/plat-s3c/pm-check.c
new file mode 100644
index 0000000..39f2555
--- /dev/null
+++ b/arch/arm/plat-s3c/pm-check.c
@@ -0,0 +1,242 @@
+/* linux/arch/arm/plat-s3c/pm-check.c
+ * originally in linux/arch/arm/plat-s3c24xx/pm.c
+ *
+ * Copyright (c) 2004,2006,2008 Simtec Electronics
+ * http://armlinux.simtec.co.uk
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C Power Mangament - suspend/resume memory corruptiuon check.
+ *
+ * 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.
+*/
+
+#include <linux/kernel.h>
+#include <linux/suspend.h>
+#include <linux/init.h>
+#include <linux/crc32.h>
+#include <linux/ioport.h>
+
+#include <plat/pm.h>
+
+#if CONFIG_S3C2410_PM_CHECK_CHUNKSIZE < 1
+#error CONFIG_S3C2410_PM_CHECK_CHUNKSIZE must be a positive non-zero value
+#endif
+
+/* suspend checking code...
+ *
+ * this next area does a set of crc checks over all the installed
+ * memory, so the system can verify if the resume was ok.
+ *
+ * CONFIG_S3C2410_PM_CHECK_CHUNKSIZE defines the block-size for the CRC,
+ * increasing it will mean that the area corrupted will be less easy to spot,
+ * and reducing the size will cause the CRC save area to grow
+*/
+
+#define CHECK_CHUNKSIZE (CONFIG_S3C2410_PM_CHECK_CHUNKSIZE * 1024)
+
+static u32 crc_size; /* size needed for the crc block */
+static u32 *crcs; /* allocated over suspend/resume */
+
+typedef u32 *(run_fn_t)(struct resource *ptr, u32 *arg);
+
+/* s3c_pm_run_res
+ *
+ * go through the given resource list, and look for system ram
+*/
+
+static void s3c_pm_run_res(struct resource *ptr, run_fn_t fn, u32 *arg)
+{
+ while (ptr != NULL) {
+ if (ptr->child != NULL)
+ s3c_pm_run_res(ptr->child, fn, arg);
+
+ if ((ptr->flags & IORESOURCE_MEM) &&
+ strcmp(ptr->name, "System RAM") == 0) {
+ S3C_PMDBG("Found system RAM at %08lx..%08lx\n",
+ (unsigned long)ptr->start,
+ (unsigned long)ptr->end);
+ arg = (fn)(ptr, arg);
+ }
+
+ ptr = ptr->sibling;
+ }
+}
+
+static void s3c_pm_run_sysram(run_fn_t fn, u32 *arg)
+{
+ s3c_pm_run_res(&iomem_resource, fn, arg);
+}
+
+static u32 *s3c_pm_countram(struct resource *res, u32 *val)
+{
+ u32 size = (u32)(res->end - res->start)+1;
+
+ size += CHECK_CHUNKSIZE-1;
+ size /= CHECK_CHUNKSIZE;
+
+ S3C_PMDBG("Area %08lx..%08lx, %d blocks\n",
+ (unsigned long)res->start, (unsigned long)res->end, size);
+
+ *val += size * sizeof(u32);
+ return val;
+}
+
+/* s3c_pm_prepare_check
+ *
+ * prepare the necessary information for creating the CRCs. This
+ * must be done before the final save, as it will require memory
+ * allocating, and thus touching bits of the kernel we do not
+ * know about.
+*/
+
+void s3c_pm_check_prepare(void)
+{
+ crc_size = 0;
+
+ s3c_pm_run_sysram(s3c_pm_countram, &crc_size);
+
+ S3C_PMDBG("s3c_pm_prepare_check: %u checks needed\n", crc_size);
+
+ crcs = kmalloc(crc_size+4, GFP_KERNEL);
+ if (crcs == NULL)
+ printk(KERN_ERR "Cannot allocated CRC save area\n");
+}
+
+static u32 *s3c_pm_makecheck(struct resource *res, u32 *val)
+{
+ unsigned long addr, left;
+
+ for (addr = res->start; addr < res->end;
+ addr += CHECK_CHUNKSIZE) {
+ left = res->end - addr;
+
+ if (left > CHECK_CHUNKSIZE)
+ left = CHECK_CHUNKSIZE;
+
+ *val = crc32_le(~0, phys_to_virt(addr), left);
+ val++;
+ }
+
+ return val;
+}
+
+/* s3c_pm_check_store
+ *
+ * compute the CRC values for the memory blocks before the final
+ * sleep.
+*/
+
+void s3c_pm_check_store(void)
+{
+ if (crcs != NULL)
+ s3c_pm_run_sysram(s3c_pm_makecheck, crcs);
+}
+
+/* in_region
+ *
+ * return TRUE if the area defined by ptr..ptr+size contains the
+ * what..what+whatsz
+*/
+
+static inline int in_region(void *ptr, int size, void *what, size_t whatsz)
+{
+ if ((what+whatsz) < ptr)
+ return 0;
+
+ if (what > (ptr+size))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * s3c_pm_runcheck() - helper to check a resource on restore.
+ * @res: The resource to check
+ * @vak: Pointer to list of CRC32 values to check.
+ *
+ * Called from the s3c_pm_check_restore() via s3c_pm_run_sysram(), this
+ * function runs the given memory resource checking it against the stored
+ * CRC to ensure that memory is restored. The function tries to skip as
+ * many of the areas used during the suspend process.
+ */
+static u32 *s3c_pm_runcheck(struct resource *res, u32 *val)
+{
+ void *save_at = phys_to_virt(s3c_sleep_save_phys);
+ unsigned long addr;
+ unsigned long left;
+ void *stkpage;
+ void *ptr;
+ u32 calc;
+
+ stkpage = (void *)((u32)&calc & ~PAGE_MASK);
+
+ for (addr = res->start; addr < res->end;
+ addr += CHECK_CHUNKSIZE) {
+ left = res->end - addr;
+
+ if (left > CHECK_CHUNKSIZE)
+ left = CHECK_CHUNKSIZE;
+
+ ptr = phys_to_virt(addr);
+
+ if (in_region(ptr, left, stkpage, 4096)) {
+ S3C_PMDBG("skipping %08lx, has stack in\n", addr);
+ goto skip_check;
+ }
+
+ if (in_region(ptr, left, crcs, crc_size)) {
+ S3C_PMDBG("skipping %08lx, has crc block in\n", addr);
+ goto skip_check;
+ }
+
+ if (in_region(ptr, left, save_at, 32*4 )) {
+ S3C_PMDBG("skipping %08lx, has save block in\n", addr);
+ goto skip_check;
+ }
+
+ /* calculate and check the checksum */
+
+ calc = crc32_le(~0, ptr, left);
+ if (calc != *val) {
+ printk(KERN_ERR "Restore CRC error at "
+ "%08lx (%08x vs %08x)\n", addr, calc, *val);
+
+ S3C_PMDBG("Restore CRC error at %08lx (%08x vs %08x)\n",
+ addr, calc, *val);
+ }
+
+ skip_check:
+ val++;
+ }
+
+ return val;
+}
+
+/**
+ * s3c_pm_check_restore() - memory check called on resume
+ *
+ * check the CRCs after the restore event and free the memory used
+ * to hold them
+*/
+void s3c_pm_check_restore(void)
+{
+ if (crcs != NULL)
+ s3c_pm_run_sysram(s3c_pm_runcheck, crcs);
+}
+
+/**
+ * s3c_pm_check_cleanup() - free memory resources
+ *
+ * Free the resources that where allocated by the suspend
+ * memory check code. We do this separately from the
+ * s3c_pm_check_restore() function as we cannot call any
+ * functions that might sleep during that resume.
+ */
+void s3c_pm_check_cleanup(void)
+{
+ kfree(crcs);
+ crcs = NULL;
+}
+
diff --git a/arch/arm/plat-s3c/pm.c b/arch/arm/plat-s3c/pm.c
new file mode 100644
index 0000000..061182c
--- /dev/null
+++ b/arch/arm/plat-s3c/pm.c
@@ -0,0 +1,363 @@
+/* linux/arch/arm/plat-s3c/pm.c
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2004,2006,2008 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ * http://armlinux.simtec.co.uk/
+ *
+ * S3C common power management (suspend to ram) support.
+ *
+ * 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.
+*/
+
+#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 <asm/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 *);
+
+void s3c_pm_dbg(const char *fmt, ...)
+{
+ va_list va;
+ char buff[256];
+
+ va_start(va, fmt);
+ vsprintf(buff, fmt, va);
+ va_end(va);
+
+ 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
+
+struct pm_uart_save uart_save[CONFIG_SERIAL_SAMSUNG_UARTS];
+
+static void s3c_pm_save_uart(unsigned int uart, struct pm_uart_save *save)
+{
+ void __iomem *regs = S3C_VA_UARTx(uart);
+
+ save->ulcon = __raw_readl(regs + S3C2410_ULCON);
+ save->ucon = __raw_readl(regs + S3C2410_UCON);
+ save->ufcon = __raw_readl(regs + S3C2410_UFCON);
+ save->umcon = __raw_readl(regs + S3C2410_UMCON);
+ save->ubrdiv = __raw_readl(regs + S3C2410_UBRDIV);
+}
+
+static void s3c_pm_save_uarts(void)
+{
+ struct pm_uart_save *save = uart_save;
+ unsigned int uart;
+
+ for (uart = 0; uart < CONFIG_SERIAL_SAMSUNG_UARTS; uart++, save++)
+ s3c_pm_save_uart(uart, save);
+}
+
+static void s3c_pm_restore_uart(unsigned int uart, struct pm_uart_save *save)
+{
+ void __iomem *regs = S3C_VA_UARTx(uart);
+
+ __raw_writel(save->ulcon, regs + S3C2410_ULCON);
+ __raw_writel(save->ucon, regs + S3C2410_UCON);
+ __raw_writel(save->ufcon, regs + S3C2410_UFCON);
+ __raw_writel(save->umcon, regs + S3C2410_UMCON);
+ __raw_writel(save->ubrdiv, regs + S3C2410_UBRDIV);
+}
+
+static void s3c_pm_restore_uarts(void)
+{
+ struct pm_uart_save *save = uart_save;
+ unsigned int uart;
+
+ for (uart = 0; uart < CONFIG_SERIAL_SAMSUNG_UARTS; uart++, save++)
+ s3c_pm_restore_uart(uart, save);
+}
+#else
+static void s3c_pm_save_uarts(void) { }
+static void s3c_pm_restore_uarts(void) { }
+#endif
+
+/* The IRQ ext-int code goes here, it is too small to currently bother
+ * with its own file. */
+
+unsigned long s3c_irqwake_intmask = 0xffffffffL;
+unsigned long s3c_irqwake_eintmask = 0xffffffffL;
+
+int s3c_irqext_wake(unsigned int irqno, unsigned int state)
+{
+ unsigned long bit = 1L << IRQ_EINT_BIT(irqno);
+
+ if (!(s3c_irqwake_eintallow & bit))
+ return -ENOENT;
+
+ printk(KERN_INFO "wake %s for irq %d\n",
+ state ? "enabled" : "disabled", irqno);
+
+ if (!state)
+ s3c_irqwake_eintmask |= bit;
+ else
+ s3c_irqwake_eintmask &= ~bit;
+
+ return 0;
+}
+
+/* helper functions to save and restore register state */
+
+/**
+ * s3c_pm_do_save() - save a set of registers for restoration on resume.
+ * @ptr: Pointer to an array of registers.
+ * @count: Size of the ptr array.
+ *
+ * Run through the list of registers given, saving their contents in the
+ * array for later restoration when we wakeup.
+ */
+void s3c_pm_do_save(struct sleep_save *ptr, int count)
+{
+ for (; count > 0; count--, ptr++) {
+ ptr->val = __raw_readl(ptr->reg);
+ S3C_PMDBG("saved %p value %08lx\n", ptr->reg, ptr->val);
+ }
+}
+
+/**
+ * s3c_pm_do_restore() - restore register values from the save list.
+ * @ptr: Pointer to an array of registers.
+ * @count: Size of the ptr array.
+ *
+ * Restore the register values saved from s3c_pm_do_save().
+ *
+ * Note, we do not use S3C_PMDBG() in here, as the system may not have
+ * restore the UARTs state yet
+*/
+
+void s3c_pm_do_restore(struct sleep_save *ptr, int count)
+{
+ for (; count > 0; count--, ptr++) {
+ printk(KERN_DEBUG "restore %p (restore %08lx, was %08x)\n",
+ ptr->reg, ptr->val, __raw_readl(ptr->reg));
+
+ __raw_writel(ptr->val, ptr->reg);
+ }
+}
+
+/**
+ * s3c_pm_do_restore_core() - early restore register values from save list.
+ *
+ * This is similar to s3c_pm_do_restore() except we try and minimise the
+ * side effects of the function in case registers that hardware might need
+ * to work has been restored.
+ *
+ * WARNING: Do not put any debug in here that may effect memory or use
+ * peripherals, as things may be changing!
+*/
+
+void s3c_pm_do_restore_core(struct sleep_save *ptr, int count)
+{
+ 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)
+{
+ static 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;
+ }
+
+ /* 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_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();
+
+ /* 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(regs_save);
+
+ /* restore the cpu state using the kernel's cpu init code. */
+
+ cpu_init();
+
+ /* restore the system state */
+
+ s3c_pm_restore_core();
+ s3c_pm_restore_uarts();
+ 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;
+}
+
+/* callback from assembly code */
+void s3c_pm_cb_flushcache(void)
+{
+ flush_cache_all();
+}
+
+static int s3c_pm_prepare(void)
+{
+ /* prepare check area if configured */
+
+ s3c_pm_check_prepare();
+ return 0;
+}
+
+static void s3c_pm_finish(void)
+{
+ s3c_pm_check_cleanup();
+}
+
+static struct platform_suspend_ops s3c_pm_ops = {
+ .enter = s3c_pm_enter,
+ .prepare = s3c_pm_prepare,
+ .finish = s3c_pm_finish,
+ .valid = suspend_valid_only_mem,
+};
+
+/* s3c_pm_init
+ *
+ * Attach the power management functions. This should be called
+ * from the board specific initialisation if the board supports
+ * it.
+*/
+
+int __init s3c_pm_init(void)
+{
+ printk("S3C Power Management, Copyright 2004 Simtec Electronics\n");
+
+ suspend_set_ops(&s3c_pm_ops);
+ return 0;
+}
diff --git a/arch/arm/plat-s3c24xx/Makefile b/arch/arm/plat-s3c24xx/Makefile
index 1e0767b..636cb127 100644
--- a/arch/arm/plat-s3c24xx/Makefile
+++ b/arch/arm/plat-s3c24xx/Makefile
@@ -27,6 +27,7 @@ obj-$(CONFIG_CPU_S3C244X) += s3c244x-irq.o
obj-$(CONFIG_CPU_S3C244X) += s3c244x-clock.o
obj-$(CONFIG_PM_SIMTEC) += pm-simtec.o
obj-$(CONFIG_PM) += pm.o
+obj-$(CONFIG_PM) += irq-pm.o
obj-$(CONFIG_PM) += sleep.o
obj-$(CONFIG_HAVE_PWM) += pwm.o
obj-$(CONFIG_S3C2410_CLOCK) += s3c2410-clock.o
diff --git a/arch/arm/plat-s3c24xx/common-smdk.c b/arch/arm/plat-s3c24xx/common-smdk.c
index 3d48370..1a8347c 100644
--- a/arch/arm/plat-s3c24xx/common-smdk.c
+++ b/arch/arm/plat-s3c24xx/common-smdk.c
@@ -201,5 +201,5 @@ void __init smdk_machine_init(void)
platform_add_devices(smdk_devs, ARRAY_SIZE(smdk_devs));
- s3c2410_pm_init();
+ s3c_pm_init();
}
diff --git a/arch/arm/plat-s3c24xx/include/plat/irq.h b/arch/arm/plat-s3c24xx/include/plat/irq.h
index 45746a9..69e1be8 100644
--- a/arch/arm/plat-s3c24xx/include/plat/irq.h
+++ b/arch/arm/plat-s3c24xx/include/plat/irq.h
@@ -10,6 +10,12 @@
* published by the Free Software Foundation.
*/
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <mach/regs-irq.h>
+#include <mach/regs-gpio.h>
+
#define irqdbf(x...)
#define irqdbf2(x...)
diff --git a/arch/arm/plat-s3c24xx/include/plat/map.h b/arch/arm/plat-s3c24xx/include/plat/map.h
index fef8ea8..eed8f78 100644
--- a/arch/arm/plat-s3c24xx/include/plat/map.h
+++ b/arch/arm/plat-s3c24xx/include/plat/map.h
@@ -31,6 +31,8 @@
#define S3C24XX_SZ_UART SZ_1M
#define S3C_UART_OFFSET (0x4000)
+#define S3C_VA_UARTx(uart) (S3C_VA_UART + ((uart * S3C_UART_OFFSET)))
+
/* Timers */
#define S3C24XX_VA_TIMER S3C_VA_TIMER
#define S3C2410_PA_TIMER (0x51000000)
diff --git a/arch/arm/plat-s3c24xx/include/plat/pm-core.h b/arch/arm/plat-s3c24xx/include/plat/pm-core.h
new file mode 100644
index 0000000..c758821
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/include/plat/pm-core.h
@@ -0,0 +1,59 @@
+/* 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);
+}
diff --git a/arch/arm/plat-s3c24xx/include/plat/pm.h b/arch/arm/plat-s3c24xx/include/plat/pm.h
deleted file mode 100644
index cc62366..0000000
--- a/arch/arm/plat-s3c24xx/include/plat/pm.h
+++ /dev/null
@@ -1,73 +0,0 @@
-/* linux/include/asm-arm/plat-s3c24xx/pm.h
- *
- * Copyright (c) 2004 Simtec Electronics
- * Written by Ben Dooks, <ben@simtec.co.uk>
- *
- * 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.
-*/
-
-/* s3c2410_pm_init
- *
- * called from board at initialisation time to setup the power
- * management
-*/
-
-#ifdef CONFIG_PM
-
-extern __init int s3c2410_pm_init(void);
-
-#else
-
-static inline int s3c2410_pm_init(void)
-{
- return 0;
-}
-#endif
-
-/* configuration for the IRQ mask over sleep */
-extern unsigned long s3c_irqwake_intmask;
-extern unsigned long s3c_irqwake_eintmask;
-
-/* IRQ masks for IRQs allowed to go to sleep (see irq.c) */
-extern unsigned long s3c_irqwake_intallow;
-extern unsigned long s3c_irqwake_eintallow;
-
-/* per-cpu sleep functions */
-
-extern void (*pm_cpu_prep)(void);
-extern void (*pm_cpu_sleep)(void);
-
-/* Flags for PM Control */
-
-extern unsigned long s3c_pm_flags;
-
-/* from sleep.S */
-
-extern int s3c2410_cpu_save(unsigned long *saveblk);
-extern void s3c2410_cpu_suspend(void);
-extern void s3c2410_cpu_resume(void);
-
-extern unsigned long s3c2410_sleep_save_phys;
-
-/* sleep save info */
-
-struct sleep_save {
- void __iomem *reg;
- unsigned long val;
-};
-
-#define SAVE_ITEM(x) \
- { .reg = (x) }
-
-extern void s3c2410_pm_do_save(struct sleep_save *ptr, int count);
-extern void s3c2410_pm_do_restore(struct sleep_save *ptr, int count);
-
-#ifdef CONFIG_PM
-extern int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state);
-extern int s3c24xx_irq_resume(struct sys_device *dev);
-#else
-#define s3c24xx_irq_suspend NULL
-#define s3c24xx_irq_resume NULL
-#endif
diff --git a/arch/arm/plat-s3c24xx/irq-pm.c b/arch/arm/plat-s3c24xx/irq-pm.c
new file mode 100644
index 0000000..b7acf1a
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/irq-pm.c
@@ -0,0 +1,95 @@
+/* linux/arch/arm/plat-s3c24xx/irq-om.c
+ *
+ * Copyright (c) 2003,2004 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ * http://armlinux.simtec.co.uk/
+ *
+ * S3C24XX - IRQ PM code
+ *
+ * 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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/sysdev.h>
+
+#include <plat/cpu.h>
+#include <plat/pm.h>
+#include <plat/irq.h>
+
+/* state for IRQs over sleep */
+
+/* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
+ *
+ * set bit to 1 in allow bitfield to enable the wakeup settings on it
+*/
+
+unsigned long s3c_irqwake_intallow = 1L << (IRQ_RTC - IRQ_EINT0) | 0xfL;
+unsigned long s3c_irqwake_eintallow = 0x0000fff0L;
+
+int s3c_irq_wake(unsigned int irqno, unsigned int state)
+{
+ unsigned long irqbit = 1 << (irqno - IRQ_EINT0);
+
+ if (!(s3c_irqwake_intallow & irqbit))
+ return -ENOENT;
+
+ printk(KERN_INFO "wake %s for irq %d\n",
+ state ? "enabled" : "disabled", irqno);
+
+ if (!state)
+ s3c_irqwake_intmask |= irqbit;
+ else
+ s3c_irqwake_intmask &= ~irqbit;
+
+ return 0;
+}
+
+static struct sleep_save irq_save[] = {
+ SAVE_ITEM(S3C2410_INTMSK),
+ SAVE_ITEM(S3C2410_INTSUBMSK),
+};
+
+/* the extint values move between the s3c2410/s3c2440 and the s3c2412
+ * so we use an array to hold them, and to calculate the address of
+ * the register at run-time
+*/
+
+static unsigned long save_extint[3];
+static unsigned long save_eintflt[4];
+static unsigned long save_eintmask;
+
+int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(save_extint); i++)
+ save_extint[i] = __raw_readl(S3C24XX_EXTINT0 + (i*4));
+
+ for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
+ save_eintflt[i] = __raw_readl(S3C24XX_EINFLT0 + (i*4));
+
+ s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
+ save_eintmask = __raw_readl(S3C24XX_EINTMASK);
+
+ return 0;
+}
+
+int s3c24xx_irq_resume(struct sys_device *dev)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(save_extint); i++)
+ __raw_writel(save_extint[i], S3C24XX_EXTINT0 + (i*4));
+
+ for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
+ __raw_writel(save_eintflt[i], S3C24XX_EINFLT0 + (i*4));
+
+ s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
+ __raw_writel(save_eintmask, S3C24XX_EINTMASK);
+
+ return 0;
+}
diff --git a/arch/arm/plat-s3c24xx/irq.c b/arch/arm/plat-s3c24xx/irq.c
index 0192ecd..9587377 100644
--- a/arch/arm/plat-s3c24xx/irq.c
+++ b/arch/arm/plat-s3c24xx/irq.c
@@ -1,6 +1,6 @@
/* linux/arch/arm/plat-s3c24xx/irq.c
*
- * Copyright (c) 2003,2004 Simtec Electronics
+ * Copyright (c) 2003,2004 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
* This program is free software; you can redistribute it and/or modify
@@ -16,38 +16,6 @@
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Changelog:
- *
- * 22-Jul-2004 Ben Dooks <ben@simtec.co.uk>
- * Fixed compile warnings
- *
- * 22-Jul-2004 Roc Wu <cooloney@yahoo.com.cn>
- * Fixed s3c_extirq_type
- *
- * 21-Jul-2004 Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org>
- * Addition of ADC/TC demux
- *
- * 04-Oct-2004 Klaus Fetscher <k.fetscher@fetron.de>
- * Fix for set_irq_type() on low EINT numbers
- *
- * 05-Oct-2004 Ben Dooks <ben@simtec.co.uk>
- * Tidy up KF's patch and sort out new release
- *
- * 05-Oct-2004 Ben Dooks <ben@simtec.co.uk>
- * Add support for power management controls
- *
- * 04-Nov-2004 Ben Dooks
- * Fix standard IRQ wake for EINT0..4 and RTC
- *
- * 22-Feb-2005 Ben Dooks
- * Fixed edge-triggering on ADC IRQ
- *
- * 28-Jun-2005 Ben Dooks
- * Mark IRQ_LCD valid
- *
- * 25-Jul-2005 Ben Dooks
- * Split the S3C2440 IRQ code to separate file
*/
#include <linux/init.h>
@@ -55,81 +23,16 @@
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/sysdev.h>
-#include <linux/io.h>
-#include <mach/hardware.h>
#include <asm/irq.h>
-
#include <asm/mach/irq.h>
#include <plat/regs-irqtype.h>
-#include <mach/regs-irq.h>
-#include <mach/regs-gpio.h>
#include <plat/cpu.h>
#include <plat/pm.h>
#include <plat/irq.h>
-/* wakeup irq control */
-
-#ifdef CONFIG_PM
-
-/* state for IRQs over sleep */
-
-/* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
- *
- * set bit to 1 in allow bitfield to enable the wakeup settings on it
-*/
-
-unsigned long s3c_irqwake_intallow = 1L << (IRQ_RTC - IRQ_EINT0) | 0xfL;
-unsigned long s3c_irqwake_intmask = 0xffffffffL;
-unsigned long s3c_irqwake_eintallow = 0x0000fff0L;
-unsigned long s3c_irqwake_eintmask = 0xffffffffL;
-
-int
-s3c_irq_wake(unsigned int irqno, unsigned int state)
-{
- unsigned long irqbit = 1 << (irqno - IRQ_EINT0);
-
- if (!(s3c_irqwake_intallow & irqbit))
- return -ENOENT;
-
- printk(KERN_INFO "wake %s for irq %d\n",
- state ? "enabled" : "disabled", irqno);
-
- if (!state)
- s3c_irqwake_intmask |= irqbit;
- else
- s3c_irqwake_intmask &= ~irqbit;
-
- return 0;
-}
-
-static int
-s3c_irqext_wake(unsigned int irqno, unsigned int state)
-{
- unsigned long bit = 1L << (irqno - EXTINT_OFF);
-
- if (!(s3c_irqwake_eintallow & bit))
- return -ENOENT;
-
- printk(KERN_INFO "wake %s for irq %d\n",
- state ? "enabled" : "disabled", irqno);
-
- if (!state)
- s3c_irqwake_eintmask |= bit;
- else
- s3c_irqwake_eintmask &= ~bit;
-
- return 0;
-}
-
-#else
-#define s3c_irqext_wake NULL
-#define s3c_irq_wake NULL
-#endif
-
-
static void
s3c_irq_mask(unsigned int irqno)
{
@@ -590,59 +493,6 @@ s3c_irq_demux_extint4t7(unsigned int irq,
}
}
-#ifdef CONFIG_PM
-
-static struct sleep_save irq_save[] = {
- SAVE_ITEM(S3C2410_INTMSK),
- SAVE_ITEM(S3C2410_INTSUBMSK),
-};
-
-/* the extint values move between the s3c2410/s3c2440 and the s3c2412
- * so we use an array to hold them, and to calculate the address of
- * the register at run-time
-*/
-
-static unsigned long save_extint[3];
-static unsigned long save_eintflt[4];
-static unsigned long save_eintmask;
-
-int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state)
-{
- unsigned int i;
-
- for (i = 0; i < ARRAY_SIZE(save_extint); i++)
- save_extint[i] = __raw_readl(S3C24XX_EXTINT0 + (i*4));
-
- for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
- save_eintflt[i] = __raw_readl(S3C24XX_EINFLT0 + (i*4));
-
- s3c2410_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
- save_eintmask = __raw_readl(S3C24XX_EINTMASK);
-
- return 0;
-}
-
-int s3c24xx_irq_resume(struct sys_device *dev)
-{
- unsigned int i;
-
- for (i = 0; i < ARRAY_SIZE(save_extint); i++)
- __raw_writel(save_extint[i], S3C24XX_EXTINT0 + (i*4));
-
- for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
- __raw_writel(save_eintflt[i], S3C24XX_EINFLT0 + (i*4));
-
- s3c2410_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
- __raw_writel(save_eintmask, S3C24XX_EINTMASK);
-
- return 0;
-}
-
-#else
-#define s3c24xx_irq_suspend NULL
-#define s3c24xx_irq_resume NULL
-#endif
-
/* s3c24xx_init_irq
*
* Initialise S3C2410 IRQ system
diff --git a/arch/arm/plat-s3c24xx/pm-simtec.c b/arch/arm/plat-s3c24xx/pm-simtec.c
index 21dfa74..da0d321 100644
--- a/arch/arm/plat-s3c24xx/pm-simtec.c
+++ b/arch/arm/plat-s3c24xx/pm-simtec.c
@@ -61,7 +61,7 @@ static __init int pm_simtec_init(void)
__raw_writel(gstatus4, S3C2410_GSTATUS4);
- return s3c2410_pm_init();
+ return s3c_pm_init();
}
arch_initcall(pm_simtec_init);
diff --git a/arch/arm/plat-s3c24xx/pm.c b/arch/arm/plat-s3c24xx/pm.c
index 34ef18e..062a293 100644
--- a/arch/arm/plat-s3c24xx/pm.c
+++ b/arch/arm/plat-s3c24xx/pm.c
@@ -31,14 +31,9 @@
#include <linux/errno.h>
#include <linux/time.h>
#include <linux/interrupt.h>
-#include <linux/crc32.h>
-#include <linux/ioport.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>
@@ -49,10 +44,6 @@
#include <plat/pm.h>
-/* for external use */
-
-unsigned long s3c_pm_flags;
-
#define PFX "s3c24xx-pm: "
static struct sleep_save core_save[] = {
@@ -120,328 +111,14 @@ static struct sleep_save misc_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
-*/
-
-extern void printascii(const char *);
-
-void pm_dbg(const char *fmt, ...)
-{
- va_list va;
- char buff[256];
-
- va_start(va, fmt);
- vsprintf(buff, fmt, va);
- va_end(va);
-
- printascii(buff);
-}
-
-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);
-}
-
-#define DBG(fmt...) pm_dbg(fmt)
-#else
-#define DBG(fmt...) printk(KERN_DEBUG fmt)
-
-#define s3c2410_pm_debug_init() do { } while(0)
-
-static struct sleep_save uart_save[] = {};
-#endif
-
-#if defined(CONFIG_S3C2410_PM_CHECK) && CONFIG_S3C2410_PM_CHECK_CHUNKSIZE != 0
-
-/* suspend checking code...
- *
- * this next area does a set of crc checks over all the installed
- * memory, so the system can verify if the resume was ok.
- *
- * CONFIG_S3C2410_PM_CHECK_CHUNKSIZE defines the block-size for the CRC,
- * increasing it will mean that the area corrupted will be less easy to spot,
- * and reducing the size will cause the CRC save area to grow
-*/
-
-#define CHECK_CHUNKSIZE (CONFIG_S3C2410_PM_CHECK_CHUNKSIZE * 1024)
-
-static u32 crc_size; /* size needed for the crc block */
-static u32 *crcs; /* allocated over suspend/resume */
-
-typedef u32 *(run_fn_t)(struct resource *ptr, u32 *arg);
-
-/* s3c2410_pm_run_res
- *
- * go thorugh the given resource list, and look for system ram
-*/
-
-static void s3c2410_pm_run_res(struct resource *ptr, run_fn_t fn, u32 *arg)
-{
- while (ptr != NULL) {
- if (ptr->child != NULL)
- s3c2410_pm_run_res(ptr->child, fn, arg);
-
- if ((ptr->flags & IORESOURCE_MEM) &&
- strcmp(ptr->name, "System RAM") == 0) {
- DBG("Found system RAM at %08lx..%08lx\n",
- ptr->start, ptr->end);
- arg = (fn)(ptr, arg);
- }
-
- ptr = ptr->sibling;
- }
-}
-
-static void s3c2410_pm_run_sysram(run_fn_t fn, u32 *arg)
-{
- s3c2410_pm_run_res(&iomem_resource, fn, arg);
-}
-
-static u32 *s3c2410_pm_countram(struct resource *res, u32 *val)
-{
- u32 size = (u32)(res->end - res->start)+1;
-
- size += CHECK_CHUNKSIZE-1;
- size /= CHECK_CHUNKSIZE;
-
- DBG("Area %08lx..%08lx, %d blocks\n", res->start, res->end, size);
-
- *val += size * sizeof(u32);
- return val;
-}
-
-/* s3c2410_pm_prepare_check
- *
- * prepare the necessary information for creating the CRCs. This
- * must be done before the final save, as it will require memory
- * allocating, and thus touching bits of the kernel we do not
- * know about.
-*/
-
-static void s3c2410_pm_check_prepare(void)
-{
- crc_size = 0;
-
- s3c2410_pm_run_sysram(s3c2410_pm_countram, &crc_size);
-
- DBG("s3c2410_pm_prepare_check: %u checks needed\n", crc_size);
-
- crcs = kmalloc(crc_size+4, GFP_KERNEL);
- if (crcs == NULL)
- printk(KERN_ERR "Cannot allocated CRC save area\n");
-}
-
-static u32 *s3c2410_pm_makecheck(struct resource *res, u32 *val)
-{
- unsigned long addr, left;
-
- for (addr = res->start; addr < res->end;
- addr += CHECK_CHUNKSIZE) {
- left = res->end - addr;
-
- if (left > CHECK_CHUNKSIZE)
- left = CHECK_CHUNKSIZE;
-
- *val = crc32_le(~0, phys_to_virt(addr), left);
- val++;
- }
-
- return val;
-}
-
-/* s3c2410_pm_check_store
- *
- * compute the CRC values for the memory blocks before the final
- * sleep.
-*/
-
-static void s3c2410_pm_check_store(void)
-{
- if (crcs != NULL)
- s3c2410_pm_run_sysram(s3c2410_pm_makecheck, crcs);
-}
-
-/* in_region
- *
- * return TRUE if the area defined by ptr..ptr+size contatins the
- * what..what+whatsz
-*/
-
-static inline int in_region(void *ptr, int size, void *what, size_t whatsz)
-{
- if ((what+whatsz) < ptr)
- return 0;
-
- if (what > (ptr+size))
- return 0;
-
- return 1;
-}
-
-static u32 *s3c2410_pm_runcheck(struct resource *res, u32 *val)
-{
- void *save_at = phys_to_virt(s3c2410_sleep_save_phys);
- unsigned long addr;
- unsigned long left;
- void *ptr;
- u32 calc;
-
- for (addr = res->start; addr < res->end;
- addr += CHECK_CHUNKSIZE) {
- left = res->end - addr;
-
- if (left > CHECK_CHUNKSIZE)
- left = CHECK_CHUNKSIZE;
-
- ptr = phys_to_virt(addr);
-
- if (in_region(ptr, left, crcs, crc_size)) {
- DBG("skipping %08lx, has crc block in\n", addr);
- goto skip_check;
- }
-
- if (in_region(ptr, left, save_at, 32*4 )) {
- DBG("skipping %08lx, has save block in\n", addr);
- goto skip_check;
- }
-
- /* calculate and check the checksum */
-
- calc = crc32_le(~0, ptr, left);
- if (calc != *val) {
- printk(KERN_ERR PFX "Restore CRC error at "
- "%08lx (%08x vs %08x)\n", addr, calc, *val);
-
- DBG("Restore CRC error at %08lx (%08x vs %08x)\n",
- addr, calc, *val);
- }
-
- skip_check:
- val++;
- }
-
- return val;
-}
-
-/* s3c2410_pm_check_restore
- *
- * check the CRCs after the restore event and free the memory used
- * to hold them
-*/
-
-static void s3c2410_pm_check_restore(void)
-{
- if (crcs != NULL) {
- s3c2410_pm_run_sysram(s3c2410_pm_runcheck, crcs);
- kfree(crcs);
- crcs = NULL;
- }
-}
-
-#else
-
-#define s3c2410_pm_check_prepare() do { } while(0)
-#define s3c2410_pm_check_restore() do { } while(0)
-#define s3c2410_pm_check_store() do { } while(0)
-#endif
-
-/* helper functions to save and restore register state */
-
-void s3c2410_pm_do_save(struct sleep_save *ptr, int count)
-{
- for (; count > 0; count--, ptr++) {
- ptr->val = __raw_readl(ptr->reg);
- DBG("saved %p value %08lx\n", ptr->reg, ptr->val);
- }
-}
-
-/* s3c2410_pm_do_restore
- *
- * restore the system from the given list of saved registers
- *
- * Note, we do not use DBG() in here, as the system may not have
- * restore the UARTs state yet
-*/
-
-void s3c2410_pm_do_restore(struct sleep_save *ptr, int count)
-{
- for (; count > 0; count--, ptr++) {
- printk(KERN_DEBUG "restore %p (restore %08lx, was %08x)\n",
- ptr->reg, ptr->val, __raw_readl(ptr->reg));
-
- __raw_writel(ptr->val, ptr->reg);
- }
-}
-
-/* s3c2410_pm_do_restore_core
- *
- * similar to s3c2410_pm_do_restore_core
- *
- * WARNING: Do not put any debug in here that may effect memory or use
- * peripherals, as things may be changing!
-*/
-
-static void s3c2410_pm_do_restore_core(struct sleep_save *ptr, int count)
-{
- 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 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)) {
- DBG("IRQ %d asserted at resume\n", start+i);
- }
- }
-}
-
-/* s3c2410_pm_check_resume_pin
+/* s3c_pm_check_resume_pin
*
* check to see if the pin is configured correctly for sleep mode, and
* make any necessary adjustments if it is not
*/
-static void s3c2410_pm_check_resume_pin(unsigned int pin, unsigned int irqoffs)
+static void s3c_pm_check_resume_pin(unsigned int pin, unsigned int irqoffs)
{
unsigned long irqstate;
unsigned long pinstate;
@@ -456,21 +133,21 @@ static void s3c2410_pm_check_resume_pin(unsigned int pin, unsigned int irqoffs)
if (!irqstate) {
if (pinstate == S3C2410_GPIO_IRQ)
- DBG("Leaving IRQ %d (pin %d) enabled\n", irq, pin);
+ S3C_PMDBG("Leaving IRQ %d (pin %d) enabled\n", irq, pin);
} else {
if (pinstate == S3C2410_GPIO_IRQ) {
- DBG("Disabling IRQ %d (pin %d)\n", irq, pin);
+ S3C_PMDBG("Disabling IRQ %d (pin %d)\n", irq, pin);
s3c2410_gpio_cfgpin(pin, S3C2410_GPIO_INPUT);
}
}
}
-/* 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;
@@ -480,11 +157,11 @@ static void s3c2410_pm_configure_extint(void)
*/
for (pin = S3C2410_GPF0; pin <= S3C2410_GPF7; pin++) {
- s3c2410_pm_check_resume_pin(pin, pin - S3C2410_GPF0);
+ s3c_pm_check_resume_pin(pin, pin - S3C2410_GPF0);
}
for (pin = S3C2410_GPG0; pin <= S3C2410_GPG7; pin++) {
- s3c2410_pm_check_resume_pin(pin, (pin - S3C2410_GPG0)+8);
+ s3c_pm_check_resume_pin(pin, (pin - S3C2410_GPG0)+8);
}
}
@@ -494,12 +171,12 @@ static void s3c2410_pm_configure_extint(void)
#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;
@@ -538,7 +215,10 @@ static inline int is_out(unsigned long con)
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
@@ -646,8 +326,8 @@ static void s3c2410_pm_restore_gpio(int index, struct gpio_sleep *gps)
__raw_writel(gps->gpup, base + OFFS_UP);
}
- DBG("GPIO[%d] CON %08lx => %08lx, DAT %08lx => %08lx\n",
- index, old_gpcon, gps_gpcon, old_gpdat, gps_gpdat);
+ S3C_PMDBG("GPIO[%d] CON %08lx => %08lx, DAT %08lx => %08lx\n",
+ index, old_gpcon, gps_gpcon, old_gpdat, gps_gpdat);
}
@@ -656,7 +336,7 @@ static void s3c2410_pm_restore_gpio(int index, struct gpio_sleep *gps)
* 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;
@@ -666,150 +346,15 @@ static void s3c2410_pm_restore_gpios(void)
}
}
-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();
-
- DBG("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 */
-
- s3c2410_pm_check_prepare();
-
- /* store the physical address of the register recovery block */
-
- s3c2410_sleep_save_phys = virt_to_phys(regs_save);
-
- DBG("s3c2410_sleep_save_phys=0x%08lx\n", s3c2410_sleep_save_phys);
-
- /* save all necessary core registers not covered by the drivers */
-
- s3c2410_pm_save_gpios();
- s3c2410_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
- s3c2410_pm_do_save(core_save, ARRAY_SIZE(core_save));
- s3c2410_pm_do_save(uart_save, ARRAY_SIZE(uart_save));
-
- /* set the irq configuration for wake */
-
- s3c2410_pm_configure_extint();
-
- DBG("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();
-
- s3c2410_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 */
-
- s3c2410_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
- s3c2410_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
- s3c2410_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 */
-
- DBG("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);
-
- DBG("post sleep, preparing to return\n");
-
- s3c2410_pm_check_restore();
-
- /* ok, let's return from sleep */
-
- DBG("S3C2410 PM Resume (post-restore)\n");
- return 0;
+ s3c_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
+ s3c_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
}
-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));
}
+
diff --git a/arch/arm/plat-s3c24xx/s3c244x.c b/arch/arm/plat-s3c24xx/s3c244x.c
index c1de6bb..1364317d 100644
--- a/arch/arm/plat-s3c24xx/s3c244x.c
+++ b/arch/arm/plat-s3c24xx/s3c244x.c
@@ -145,13 +145,13 @@ static struct sleep_save s3c244x_sleep[] = {
static int s3c244x_suspend(struct sys_device *dev, pm_message_t state)
{
- s3c2410_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
+ s3c_pm_do_save(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
return 0;
}
static int s3c244x_resume(struct sys_device *dev)
{
- s3c2410_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
+ s3c_pm_do_restore(s3c244x_sleep, ARRAY_SIZE(s3c244x_sleep));
return 0;
}
diff --git a/arch/arm/plat-s3c24xx/sleep.S b/arch/arm/plat-s3c24xx/sleep.S
index 76594b2..e73e3b6e 100644
--- a/arch/arm/plat-s3c24xx/sleep.S
+++ b/arch/arm/plat-s3c24xx/sleep.S
@@ -41,25 +41,13 @@
.text
- /* s3c2410_cpu_save
- *
- * save enough of the CPU state to allow us to re-start
- * pm.c code. as we store items like the sp/lr, we will
- * end up returning from this function when the cpu resumes
- * so the return value is set to mark this.
- *
- * This arangement means we avoid having to flush the cache
- * from this code.
+ /* s3c_cpu_save
*
* entry:
- * r0 = pointer to save block
- *
- * exit:
- * r0 = 0 => we stored everything
- * 1 => resumed from sleep
+ * r0 = save address (virtual addr of s3c_sleep_save_phys)
*/
-ENTRY(s3c2410_cpu_save)
+ENTRY(s3c_cpu_save)
stmfd sp!, { r4 - r12, lr }
@@ store co-processor registers
@@ -71,20 +59,25 @@ ENTRY(s3c2410_cpu_save)
stmia r0, { r4 - r13 }
- mov r0, #0
- ldmfd sp, { r4 - r12, pc }
+ @@ write our state back to RAM
+ bl s3c_pm_cb_flushcache
+ @@ jump to final code to send system to sleep
+ ldr r0, =pm_cpu_sleep
+ @@ldr pc, [ r0 ]
+ ldr r0, [ r0 ]
+ mov pc, r0
+
@@ return to the caller, after having the MMU
@@ turned on, this restores the last bits from the
@@ stack
resume_with_mmu:
- mov r0, #1
ldmfd sp!, { r4 - r12, pc }
.ltorg
@@ the next bits sit in the .data segment, even though they
- @@ happen to be code... the s3c2410_sleep_save_phys needs to be
+ @@ happen to be code... the s3c_sleep_save_phys needs to be
@@ accessed by the resume code before it can restore the MMU.
@@ This means that the variable has to be close enough for the
@@ code to read it... since the .text segment needs to be RO,
@@ -92,19 +85,19 @@ resume_with_mmu:
.data
- .global s3c2410_sleep_save_phys
-s3c2410_sleep_save_phys:
+ .global s3c_sleep_save_phys
+s3c_sleep_save_phys:
.word 0
/* sleep magic, to allow the bootloader to check for an valid
* image to resume to. Must be the first word before the
- * s3c2410_cpu_resume entry.
+ * s3c_cpu_resume entry.
*/
.word 0x2bedf00d
- /* s3c2410_cpu_resume
+ /* s3c_cpu_resume
*
* resume code entry for bootloader to call
*
@@ -113,7 +106,7 @@ s3c2410_sleep_save_phys:
* must not write to the code segment (code is read-only)
*/
-ENTRY(s3c2410_cpu_resume)
+ENTRY(s3c_cpu_resume)
mov r0, #PSR_I_BIT | PSR_F_BIT | SVC_MODE
msr cpsr_c, r0
@@ -145,7 +138,7 @@ ENTRY(s3c2410_cpu_resume)
mcr p15, 0, r1, c8, c7, 0 @@ invalidate I & D TLBs
mcr p15, 0, r1, c7, c7, 0 @@ invalidate I & D caches
- ldr r0, s3c2410_sleep_save_phys @ address of restore block
+ ldr r0, s3c_sleep_save_phys @ address of restore block
ldmia r0, { r4 - r13 }
mcr p15, 0, r4, c13, c0, 0 @ PID
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