diff options
Diffstat (limited to 'arch/arm/mach-integrator/time.c')
| -rw-r--r-- | arch/arm/mach-integrator/time.c | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/arch/arm/mach-integrator/time.c b/arch/arm/mach-integrator/time.c deleted file mode 100644 index 8508a0d..0000000 --- a/arch/arm/mach-integrator/time.c +++ /dev/null @@ -1,223 +0,0 @@ -/* - * linux/arch/arm/mach-integrator/time.c - * - * Copyright (C) 2000-2001 Deep Blue Solutions Ltd. - * - * 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/module.h> -#include <linux/kernel.h> -#include <linux/time.h> -#include <linux/mc146818rtc.h> -#include <linux/interrupt.h> -#include <linux/init.h> -#include <linux/device.h> -#include <linux/amba/bus.h> - -#include <asm/hardware.h> -#include <asm/io.h> -#include <asm/uaccess.h> -#include <asm/rtc.h> - -#include <asm/mach/time.h> - -#define RTC_DR (0) -#define RTC_MR (4) -#define RTC_STAT (8) -#define RTC_EOI (8) -#define RTC_LR (12) -#define RTC_CR (16) -#define RTC_CR_MIE (1 << 0) - -extern int (*set_rtc)(void); -static void __iomem *rtc_base; - -static int integrator_set_rtc(void) -{ - __raw_writel(xtime.tv_sec, rtc_base + RTC_LR); - return 1; -} - -static int integrator_rtc_read_alarm(struct rtc_wkalrm *alrm) -{ - rtc_time_to_tm(readl(rtc_base + RTC_MR), &alrm->time); - return 0; -} - -static inline int integrator_rtc_set_alarm(struct rtc_wkalrm *alrm) -{ - unsigned long time; - int ret; - - /* - * At the moment, we can only deal with non-wildcarded alarm times. - */ - ret = rtc_valid_tm(&alrm->time); - if (ret == 0) - ret = rtc_tm_to_time(&alrm->time, &time); - if (ret == 0) - writel(time, rtc_base + RTC_MR); - return ret; -} - -static int integrator_rtc_read_time(struct rtc_time *tm) -{ - rtc_time_to_tm(readl(rtc_base + RTC_DR), tm); - return 0; -} - -/* - * Set the RTC time. Unfortunately, we can't accurately set - * the point at which the counter updates. - * - * Also, since RTC_LR is transferred to RTC_CR on next rising - * edge of the 1Hz clock, we must write the time one second - * in advance. - */ -static inline int integrator_rtc_set_time(struct rtc_time *tm) -{ - unsigned long time; - int ret; - - ret = rtc_tm_to_time(tm, &time); - if (ret == 0) - writel(time + 1, rtc_base + RTC_LR); - - return ret; -} - -static struct rtc_ops rtc_ops = { - .owner = THIS_MODULE, - .read_time = integrator_rtc_read_time, - .set_time = integrator_rtc_set_time, - .read_alarm = integrator_rtc_read_alarm, - .set_alarm = integrator_rtc_set_alarm, -}; - -static irqreturn_t arm_rtc_interrupt(int irq, void *dev_id) -{ - writel(0, rtc_base + RTC_EOI); - return IRQ_HANDLED; -} - -static int rtc_probe(struct amba_device *dev, void *id) -{ - int ret; - - if (rtc_base) - return -EBUSY; - - ret = amba_request_regions(dev, NULL); - if (ret) - goto out; - - rtc_base = ioremap(dev->res.start, SZ_4K); - if (!rtc_base) { - ret = -ENOMEM; - goto res_out; - } - - __raw_writel(0, rtc_base + RTC_CR); - __raw_writel(0, rtc_base + RTC_EOI); - - xtime.tv_sec = __raw_readl(rtc_base + RTC_DR); - - /* note that 'dev' is merely used for irq disambiguation; - * it is not actually referenced in the irq handler - */ - ret = request_irq(dev->irq[0], arm_rtc_interrupt, IRQF_DISABLED, - "rtc-pl030", dev); - if (ret) - goto map_out; - - ret = register_rtc(&rtc_ops); - if (ret) - goto irq_out; - - set_rtc = integrator_set_rtc; - return 0; - - irq_out: - free_irq(dev->irq[0], dev); - map_out: - iounmap(rtc_base); - rtc_base = NULL; - res_out: - amba_release_regions(dev); - out: - return ret; -} - -static int rtc_remove(struct amba_device *dev) -{ - set_rtc = NULL; - - writel(0, rtc_base + RTC_CR); - - free_irq(dev->irq[0], dev); - unregister_rtc(&rtc_ops); - - iounmap(rtc_base); - rtc_base = NULL; - amba_release_regions(dev); - - return 0; -} - -static struct timespec rtc_delta; - -static int rtc_suspend(struct amba_device *dev, pm_message_t state) -{ - struct timespec rtc; - - rtc.tv_sec = readl(rtc_base + RTC_DR); - rtc.tv_nsec = 0; - save_time_delta(&rtc_delta, &rtc); - - return 0; -} - -static int rtc_resume(struct amba_device *dev) -{ - struct timespec rtc; - - rtc.tv_sec = readl(rtc_base + RTC_DR); - rtc.tv_nsec = 0; - restore_time_delta(&rtc_delta, &rtc); - - return 0; -} - -static struct amba_id rtc_ids[] = { - { - .id = 0x00041030, - .mask = 0x000fffff, - }, - { 0, 0 }, -}; - -static struct amba_driver rtc_driver = { - .drv = { - .name = "rtc-pl030", - }, - .probe = rtc_probe, - .remove = rtc_remove, - .suspend = rtc_suspend, - .resume = rtc_resume, - .id_table = rtc_ids, -}; - -static int __init integrator_rtc_init(void) -{ - return amba_driver_register(&rtc_driver); -} - -static void __exit integrator_rtc_exit(void) -{ - amba_driver_unregister(&rtc_driver); -} - -module_init(integrator_rtc_init); -module_exit(integrator_rtc_exit); |
