From ed618aff8a952f712caf1d475e0947a32a8b6606 Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Tue, 26 Jan 2010 11:07:23 +0900 Subject: ARM: S3C64XX: Move IRQ support into mach-s3c64xx Move IRQ support to mach-s3c64xx as it is unlikely to be re-used outside this machine. Signed-off-by: Ben Dooks --- arch/arm/mach-s3c64xx/irq-pm.c | 111 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 111 insertions(+) create mode 100644 arch/arm/mach-s3c64xx/irq-pm.c (limited to 'arch/arm/mach-s3c64xx/irq-pm.c') diff --git a/arch/arm/mach-s3c64xx/irq-pm.c b/arch/arm/mach-s3c64xx/irq-pm.c new file mode 100644 index 00000000000..da1bec64b9d --- /dev/null +++ b/arch/arm/mach-s3c64xx/irq-pm.c @@ -0,0 +1,111 @@ +/* arch/arm/plat-s3c64xx/irq-pm.c + * + * Copyright 2008 Openmoko, Inc. + * Copyright 2008 Simtec Electronics + * Ben Dooks + * http://armlinux.simtec.co.uk/ + * + * S3C64XX - Interrupt handling Power Management + * + * 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 +#include +#include +#include +#include + +/* We handled all the IRQ types in this code, to save having to make several + * small files to handle each different type separately. Having the EINT_GRP + * code here shouldn't be as much bloat as the IRQ table space needed when + * they are enabled. The added benefit is we ensure that these registers are + * in the same state as we suspended. + */ + +static struct sleep_save irq_save[] = { + SAVE_ITEM(S3C64XX_PRIORITY), + SAVE_ITEM(S3C64XX_EINT0CON0), + SAVE_ITEM(S3C64XX_EINT0CON1), + SAVE_ITEM(S3C64XX_EINT0FLTCON0), + SAVE_ITEM(S3C64XX_EINT0FLTCON1), + SAVE_ITEM(S3C64XX_EINT0FLTCON2), + SAVE_ITEM(S3C64XX_EINT0FLTCON3), + SAVE_ITEM(S3C64XX_EINT0MASK), + SAVE_ITEM(S3C64XX_TINT_CSTAT), +}; + +static struct irq_grp_save { + u32 fltcon; + u32 con; + u32 mask; +} eint_grp_save[5]; + +static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS]; + +static int s3c64xx_irq_pm_suspend(struct sys_device *dev, pm_message_t state) +{ + struct irq_grp_save *grp = eint_grp_save; + int i; + + S3C_PMDBG("%s: suspending IRQs\n", __func__); + + s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save)); + + for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++) + irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM); + + for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) { + grp->con = __raw_readl(S3C64XX_EINT12CON + (i * 4)); + grp->mask = __raw_readl(S3C64XX_EINT12MASK + (i * 4)); + grp->fltcon = __raw_readl(S3C64XX_EINT12FLTCON + (i * 4)); + } + + return 0; +} + +static int s3c64xx_irq_pm_resume(struct sys_device *dev) +{ + struct irq_grp_save *grp = eint_grp_save; + int i; + + S3C_PMDBG("%s: resuming IRQs\n", __func__); + + s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save)); + + for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++) + __raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM); + + for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) { + __raw_writel(grp->con, S3C64XX_EINT12CON + (i * 4)); + __raw_writel(grp->mask, S3C64XX_EINT12MASK + (i * 4)); + __raw_writel(grp->fltcon, S3C64XX_EINT12FLTCON + (i * 4)); + } + + S3C_PMDBG("%s: IRQ configuration restored\n", __func__); + return 0; +} + +static struct sysdev_driver s3c64xx_irq_driver = { + .suspend = s3c64xx_irq_pm_suspend, + .resume = s3c64xx_irq_pm_resume, +}; + +static int __init s3c64xx_irq_pm_init(void) +{ + return sysdev_driver_register(&s3c64xx_sysclass, &s3c64xx_irq_driver); +} + +arch_initcall(s3c64xx_irq_pm_init); + -- cgit v1.2.3-70-g09d2