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Merge branch 'next-s3c-pm' of git://aeryn.fluff.org.uk/bjdooks/linux into devel
This commit is contained in:
Russell King
Russell King
@@ -40,13 +40,13 @@ Resuming
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Machine Support
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---------------
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The machine specific functions must call the s3c2410_pm_init() function
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The machine specific functions must call the s3c_pm_init() function
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to say that its bootloader is capable of resuming. This can be as
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simple as adding the following to the machine's definition:
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INITMACHINE(s3c2410_pm_init)
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INITMACHINE(s3c_pm_init)
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A board can do its own setup before calling s3c2410_pm_init, if it
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A board can do its own setup before calling s3c_pm_init, if it
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needs to setup anything else for power management support.
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There is currently no support for over-riding the default method of
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@@ -74,7 +74,7 @@ statuc void __init machine_init(void)
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enable_irq_wake(IRQ_EINT0);
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s3c2410_pm_init();
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s3c_pm_init();
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}
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@@ -0,0 +1,23 @@
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/* arch/arm/mach-s3c2410/include/mach/gpio-nrs.h
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*
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* Copyright (c) 2008 Simtec Electronics
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* http://armlinux.simtec.co.uk/
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* Ben Dooks <ben@simtec.co.uk>
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*
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* S3C2410 - GPIO bank numbering
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#define S3C2410_GPIONO(bank,offset) ((bank) + (offset))
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#define S3C2410_GPIO_BANKA (32*0)
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#define S3C2410_GPIO_BANKB (32*1)
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#define S3C2410_GPIO_BANKC (32*2)
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#define S3C2410_GPIO_BANKD (32*3)
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#define S3C2410_GPIO_BANKE (32*4)
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#define S3C2410_GPIO_BANKF (32*5)
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#define S3C2410_GPIO_BANKG (32*6)
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#define S3C2410_GPIO_BANKH (32*7)
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@@ -23,3 +23,6 @@
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#define ARCH_NR_GPIOS (256 + CONFIG_S3C24XX_GPIO_EXTRA)
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#include <asm-generic/gpio.h>
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#include <mach/gpio-nrs.h>
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#define S3C_GPIO_END (S3C2410_GPIO_BANKH + 32)
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@@ -80,7 +80,7 @@
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#define IRQ_EINT22 S3C2410_IRQ(50)
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#define IRQ_EINT23 S3C2410_IRQ(51)
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#define IRQ_EINT_BIT(x) ((x) - IRQ_EINT4 + 4)
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#define IRQ_EINT(x) (((x) >= 4) ? (IRQ_EINT4 + (x) - 4) : (IRQ_EINT0 + (x)))
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#define IRQ_LCD_FIFO S3C2410_IRQ(52)
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@@ -14,16 +14,7 @@
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#ifndef __ASM_ARCH_REGS_GPIO_H
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#define __ASM_ARCH_REGS_GPIO_H
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#define S3C2410_GPIONO(bank,offset) ((bank) + (offset))
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#define S3C2410_GPIO_BANKA (32*0)
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#define S3C2410_GPIO_BANKB (32*1)
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#define S3C2410_GPIO_BANKC (32*2)
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#define S3C2410_GPIO_BANKD (32*3)
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#define S3C2410_GPIO_BANKE (32*4)
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#define S3C2410_GPIO_BANKF (32*5)
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#define S3C2410_GPIO_BANKG (32*6)
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#define S3C2410_GPIO_BANKH (32*7)
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#include <mach/gpio-nrs.h>
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#ifdef CONFIG_CPU_S3C2400
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#define S3C24XX_GPIO_BASE(x) S3C2400_GPIO_BASE(x)
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@@ -203,7 +203,7 @@ static void __init h1940_map_io(void)
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#ifdef CONFIG_PM_H1940
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memcpy(phys_to_virt(H1940_SUSPEND_RESUMEAT), h1940_pm_return, 1024);
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#endif
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s3c2410_pm_init();
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s3c_pm_init();
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}
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static void __init h1940_init_irq(void)
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@@ -355,7 +355,7 @@ static void __init qt2410_machine_init(void)
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s3c2410_gpio_cfgpin(S3C2410_GPB5, S3C2410_GPIO_OUTPUT);
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platform_add_devices(qt2410_devices, ARRAY_SIZE(qt2410_devices));
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s3c2410_pm_init();
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s3c_pm_init();
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}
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MACHINE_START(QT2410, "QT2410")
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@@ -37,21 +37,14 @@
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#include <plat/cpu.h>
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#include <plat/pm.h>
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#ifdef CONFIG_S3C2410_PM_DEBUG
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extern void pm_dbg(const char *fmt, ...);
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#define DBG(fmt...) pm_dbg(fmt)
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#else
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#define DBG(fmt...) printk(KERN_DEBUG fmt)
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#endif
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static void s3c2410_pm_prepare(void)
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{
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/* ensure at least GSTATUS3 has the resume address */
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__raw_writel(virt_to_phys(s3c2410_cpu_resume), S3C2410_GSTATUS3);
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__raw_writel(virt_to_phys(s3c_cpu_resume), S3C2410_GSTATUS3);
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DBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3));
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DBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4));
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S3C_PMDBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3));
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S3C_PMDBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4));
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if (machine_is_h1940()) {
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void *base = phys_to_virt(H1940_SUSPEND_CHECK);
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@@ -494,7 +494,7 @@ static int jive_pm_suspend(struct sys_device *sd, pm_message_t state)
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* correct address to resume from. */
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__raw_writel(0x2BED, S3C2412_INFORM0);
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__raw_writel(virt_to_phys(s3c2410_cpu_resume), S3C2412_INFORM1);
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__raw_writel(virt_to_phys(s3c_cpu_resume), S3C2412_INFORM1);
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return 0;
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}
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@@ -630,7 +630,7 @@ static void __init jive_machine_init(void)
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/* initialise the power management now we've setup everything. */
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s3c2410_pm_init();
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s3c_pm_init();
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s3c_device_nand.dev.platform_data = &jive_nand_info;
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@@ -85,7 +85,7 @@ static struct sleep_save s3c2412_sleep[] = {
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static int s3c2412_pm_suspend(struct sys_device *dev, pm_message_t state)
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{
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s3c2410_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
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s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
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return 0;
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}
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@@ -98,7 +98,7 @@ static int s3c2412_pm_resume(struct sys_device *dev)
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tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
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__raw_writel(tmp, S3C2412_PWRCFG);
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s3c2410_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
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s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
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return 0;
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}
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@@ -203,7 +203,7 @@ static void __init rx3715_init_machine(void)
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#ifdef CONFIG_PM_H1940
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memcpy(phys_to_virt(H1940_SUSPEND_RESUMEAT), h1940_pm_return, 1024);
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#endif
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s3c2410_pm_init();
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s3c_pm_init();
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s3c24xx_fb_set_platdata(&rx3715_fb_info);
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platform_add_devices(rx3715_devices, ARRAY_SIZE(rx3715_devices));
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@@ -70,6 +70,8 @@
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#define IRQ_EINT17 S3C2410_IRQ(49)
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#define IRQ_EINT18 S3C2410_IRQ(50)
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#define IRQ_EINT_BIT(x) ((x) - IRQ_EINT00)
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/* SUB IRQS */
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#define IRQ_S3CUART_RX0 S3C2410_IRQ(51) /* 67 */
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#define IRQ_S3CUART_TX0 S3C2410_IRQ(52)
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@@ -18,6 +18,11 @@ obj-y += pwm-clock.o
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obj-y += gpio.o
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obj-y += gpio-config.o
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# PM support
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obj-$(CONFIG_PM) += pm.o
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obj-$(CONFIG_S3C2410_PM_CHECK) += pm-check.o
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# devices
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obj-$(CONFIG_S3C_DEV_HSMMC) += dev-hsmmc.o
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@@ -0,0 +1,174 @@
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/* linux/include/asm-arm/plat-s3c24xx/pm.h
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*
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* Copyright (c) 2004 Simtec Electronics
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* http://armlinux.simtec.co.uk/
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* Written by Ben Dooks, <ben@simtec.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/* s3c_pm_init
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*
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* called from board at initialisation time to setup the power
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* management
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*/
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#ifdef CONFIG_PM
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extern __init int s3c_pm_init(void);
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#else
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static inline int s3c_pm_init(void)
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{
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return 0;
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}
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#endif
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/* configuration for the IRQ mask over sleep */
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extern unsigned long s3c_irqwake_intmask;
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extern unsigned long s3c_irqwake_eintmask;
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/* IRQ masks for IRQs allowed to go to sleep (see irq.c) */
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extern unsigned long s3c_irqwake_intallow;
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extern unsigned long s3c_irqwake_eintallow;
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/* per-cpu sleep functions */
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extern void (*pm_cpu_prep)(void);
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extern void (*pm_cpu_sleep)(void);
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/* Flags for PM Control */
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extern unsigned long s3c_pm_flags;
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/* from sleep.S */
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extern int s3c_cpu_save(unsigned long *saveblk);
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extern void s3c_cpu_resume(void);
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extern void s3c2410_cpu_suspend(void);
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extern unsigned long s3c_sleep_save_phys;
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/* sleep save info */
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/**
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* struct sleep_save - save information for shared peripherals.
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* @reg: Pointer to the register to save.
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* @val: Holder for the value saved from reg.
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*
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* This describes a list of registers which is used by the pm core and
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* other subsystem to save and restore register values over suspend.
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*/
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struct sleep_save {
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void __iomem *reg;
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unsigned long val;
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};
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#define SAVE_ITEM(x) \
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{ .reg = (x) }
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/**
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* struct pm_uart_save - save block for core UART
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* @ulcon: Save value for S3C2410_ULCON
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* @ucon: Save value for S3C2410_UCON
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* @ufcon: Save value for S3C2410_UFCON
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* @umcon: Save value for S3C2410_UMCON
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* @ubrdiv: Save value for S3C2410_UBRDIV
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*
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* Save block for UART registers to be held over sleep and restored if they
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* are needed (say by debug).
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*/
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struct pm_uart_save {
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u32 ulcon;
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u32 ucon;
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u32 ufcon;
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u32 umcon;
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u32 ubrdiv;
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};
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/* helper functions to save/restore lists of registers. */
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extern void s3c_pm_do_save(struct sleep_save *ptr, int count);
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extern void s3c_pm_do_restore(struct sleep_save *ptr, int count);
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extern void s3c_pm_do_restore_core(struct sleep_save *ptr, int count);
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#ifdef CONFIG_PM
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extern int s3c_irqext_wake(unsigned int irqno, unsigned int state);
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extern int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state);
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extern int s3c24xx_irq_resume(struct sys_device *dev);
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#else
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#define s3c_irqext_wake NULL
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#define s3c24xx_irq_suspend NULL
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#define s3c24xx_irq_resume NULL
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#endif
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/* PM debug functions */
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#ifdef CONFIG_S3C2410_PM_DEBUG
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/**
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* s3c_pm_dbg() - low level debug function for use in suspend/resume.
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* @msg: The message to print.
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*
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* This function is used mainly to debug the resume process before the system
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* can rely on printk/console output. It uses the low-level debugging output
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* routine printascii() to do its work.
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*/
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extern void s3c_pm_dbg(const char *msg, ...);
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#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)
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#else
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#define S3C_PMDBG(fmt...) printk(KERN_DEBUG fmt)
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#endif
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/* suspend memory checking */
|
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#ifdef CONFIG_S3C2410_PM_CHECK
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extern void s3c_pm_check_prepare(void);
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extern void s3c_pm_check_restore(void);
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extern void s3c_pm_check_cleanup(void);
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extern void s3c_pm_check_store(void);
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#else
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#define s3c_pm_check_prepare() do { } while(0)
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#define s3c_pm_check_restore() do { } while(0)
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#define s3c_pm_check_cleanup() do { } while(0)
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#define s3c_pm_check_store() do { } while(0)
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#endif
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/**
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* s3c_pm_configure_extint() - ensure pins are correctly set for IRQ
|
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*
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* Setup all the necessary GPIO pins for waking the system on external
|
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* interrupt.
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*/
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extern void s3c_pm_configure_extint(void);
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|
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/**
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* s3c_pm_restore_gpios() - restore the state of the gpios after sleep.
|
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*
|
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* 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
|
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* resume code has done.
|
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*/
|
||||
extern void s3c_pm_restore_gpios(void);
|
||||
|
||||
/**
|
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* 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);
|
||||
@@ -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;
|
||||
}
|
||||
|
||||
@@ -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;
|
||||
}
|
||||
@@ -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
|
||||
|
||||
@@ -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();
|
||||
}
|
||||
|
||||
@@ -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...)
|
||||
|
||||
|
||||
@@ -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)
|
||||
|
||||
Some files were not shown because too many files have changed in this diff Show More
Reference in New Issue
Block a user