From 0317e52e046f815b4ec4ac7876f63e4eb47696bd Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Thu, 20 May 2010 14:05:33 +0900 Subject: [PATCH] ARM: SAMSUNG: Add support for interrupt wakeup-sources Add support for wakeup-mask style interrupts that share a single mask register for various different interrupts. This registers a set of interrupt->bit mappings and the register they belong to. Signed-off-by: Ben Dooks --- arch/arm/plat-samsung/Kconfig | 8 ++++ arch/arm/plat-samsung/Makefile | 2 + arch/arm/plat-samsung/include/plat/wakeup-mask.h | 44 ++++++++++++++++++++++ arch/arm/plat-samsung/wakeup-mask.c | 47 ++++++++++++++++++++++++ 4 files changed, 101 insertions(+) create mode 100644 arch/arm/plat-samsung/include/plat/wakeup-mask.h create mode 100644 arch/arm/plat-samsung/wakeup-mask.c diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig index d663078..2753fb3 100644 --- a/arch/arm/plat-samsung/Kconfig +++ b/arch/arm/plat-samsung/Kconfig @@ -285,4 +285,12 @@ config SAMSUNG_PM_CHECK_CHUNKSIZE See +config SAMSUNG_WAKEMASK + bool + depends on PM + help + Compile support for wakeup-mask controls found on the S3C6400 + and above. This code allows a set of interrupt to wakeup-mask + mappings. See + endif diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile index d98316b..b1d82cc 100644 --- a/arch/arm/plat-samsung/Makefile +++ b/arch/arm/plat-samsung/Makefile @@ -61,6 +61,8 @@ obj-$(CONFIG_PM) += pm.o obj-$(CONFIG_PM) += pm-gpio.o obj-$(CONFIG_SAMSUNG_PM_CHECK) += pm-check.o +obj-$(CONFIG_SAMSUNG_WAKEMASK) += wakeup-mask.o + # PWM support obj-$(CONFIG_HAVE_PWM) += pwm.o diff --git a/arch/arm/plat-samsung/include/plat/wakeup-mask.h b/arch/arm/plat-samsung/include/plat/wakeup-mask.h new file mode 100644 index 0000000..43e4acd --- /dev/null +++ b/arch/arm/plat-samsung/include/plat/wakeup-mask.h @@ -0,0 +1,44 @@ +/* arch/arm/plat-samsung/include/plat/wakeup-mask.h + * + * Copyright 2010 Ben Dooks + * + * Support for wakeup mask interrupts on newer SoCs + * + * 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. + * +*/ + +#ifndef __PLAT_WAKEUP_MASK_H +#define __PLAT_WAKEUP_MASK_H __file__ + +/* if no irq yet defined, but still want to mask */ +#define NO_WAKEUP_IRQ (0x90000000) + +/** + * struct samsung_wakeup_mask - wakeup mask information + * @irq: The interrupt associated with this wakeup. + * @bit: The bit, as a (1 << bitno) controlling this source. + */ +struct samsung_wakeup_mask { + unsigned int irq; + u32 bit; +}; + +/** + * samsung_sync_wakemask - sync wakeup mask information for pm + * @reg: The register that is used. + * @masks: The list of masks to use. + * @nr_masks: The number of entries pointed to buy @masks. + * + * Synchronise the wakeup mask information at suspend time from the list + * of interrupts and control bits in @masks. We do this at suspend time + * as overriding the relevant irq chips is harder and the register is only + * required to be correct before we enter sleep. + */ +extern void samsung_sync_wakemask(void __iomem *reg, + struct samsung_wakeup_mask *masks, + int nr_masks); + +#endif /* __PLAT_WAKEUP_MASK_H */ diff --git a/arch/arm/plat-samsung/wakeup-mask.c b/arch/arm/plat-samsung/wakeup-mask.c new file mode 100644 index 0000000..2e09b6a --- /dev/null +++ b/arch/arm/plat-samsung/wakeup-mask.c @@ -0,0 +1,47 @@ +/* arch/arm/plat-samsung/wakeup-mask.c + * + * Copyright 2010 Ben Dooks + * + * Support for wakeup mask interrupts on newer SoCs + * + * 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 +#include +#include +#include +#include +#include + +#include +#include + +void samsung_sync_wakemask(void __iomem *reg, + struct samsung_wakeup_mask *mask, int nr_mask) +{ + struct irq_desc *desc; + u32 val; + + val = __raw_readl(reg); + + for (; nr_mask > 0; nr_mask--, mask++) { + if (mask->irq == NO_WAKEUP_IRQ) { + val |= mask->bit; + continue; + } + + desc = irq_to_desc(mask->irq); + + /* bit of a liberty to read this directly from irq_desc. */ + if (desc->wake_depth > 0) + val &= ~mask->bit; + else + val |= mask->bit; + } + + printk(KERN_INFO "wakemask %08x => %08x\n", __raw_readl(reg), val); + __raw_writel(val, reg); +} -- 2.7.4