+++ /dev/null
-/*
- * TI OMAP Real Time Clock interface for Linux
- *
- * Copyright (C) 2003 MontaVista Software, Inc.
- * Author: George G. Davis <gdavis@mvista.com> or <source@mvista.com>
- *
- * Initially based on linux-2.4.20/drivers/char/rtc.c
- * Copyright (C) 1996 Paul Gortmaker
- *
- * This driver allows use of the real time clock (built into
- * nearly all computers) from user space. It exports the /dev/rtc
- * interface supporting various ioctl() and also the
- * /proc/driver/rtc pseudo-file for status information.
- *
- * The ioctls can be used to set the interrupt behaviour from the
- * RTC via IRQs. Then the /dev/rtc interface can be used to make
- * use of RTC interrupts, be they time update or alarm based.
- *
- * The /dev/rtc interface will block on reads until an interrupt
- * has been received. If a RTC interrupt has already happened,
- * it will output an unsigned long and then block. The output value
- * contains the interrupt status in the low byte and the number of
- * interrupts since the last read in the remaining high bytes. The
- * /dev/rtc interface can also be used with the select(2) call.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Based on other minimal char device drivers, like Alan's
- * watchdog, Ted's random, etc. etc.
- *
- * Change Log :
- * v1.0 <gdavis@mvista.com> Initial version based on rtc.c v1.10e
- * <ramakrishnan@india.ti.com> Added support for 2.6 kernel,
- * - changed the return value of the interrupt handler
- */
-
-/*
- * Note that *all* calls to CMOS_READ and CMOS_WRITE are done with
- * interrupts disabled.
- * REVISIT: Elaborate on OMAP1510 TRM 15uS BUSY access rule.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/ioport.h>
-#include <linux/fcntl.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/proc_fs.h>
-#include <linux/spinlock.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/rtc.h>
-#include <linux/bcd.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/hardware.h>
-#include <asm/irq.h>
-#include <asm/rtc.h>
-#include <asm/mach/time.h>
-
-#include "omap-rtc.h"
-
-extern spinlock_t rtc_lock;
-
-static int omap_rtc_alarm = NO_IRQ;
-static int omap_rtc_timer = NO_IRQ;
-
-
-/* OMAP RTC register access macros: */
-
-#define CMOS_READ(addr) omap_readb(addr)
-#define CMOS_WRITE(val, addr) omap_writeb(val, addr)
-
-static struct fasync_struct *rtc_async_queue;
-
-static DECLARE_WAIT_QUEUE_HEAD(rtc_wait);
-
-static void get_rtc_time (struct rtc_time *rtc_tm);
-static void get_rtc_alm_time (struct rtc_time *alm_tm);
-
-static void set_rtc_irq_bit(unsigned char bit);
-static void mask_rtc_irq_bit(unsigned char bit);
-
-static int rtc_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-
-/*
- * Bits in rtc_status. (7 bits of room for future expansion)
- */
-
-#define RTC_IS_OPEN 0x01 /* means /dev/rtc is in use */
-
-/*
- * REVISIT: fix this comment:
- * rtc_status is never changed by rtc_interrupt, and ioctl/open/close is
- * protected by the big kernel lock.
- */
-static unsigned long rtc_status = 0; /* bitmapped status byte. */
-static unsigned long rtc_irq_data = 0; /* our output to the world */
-
-/*
- * If this driver ever becomes modularised, it will be really nice
- * to make the epoch retain its value across module reload...
- */
-
-static unsigned long epoch = 1900; /* year corresponding to 0x00 */
-
-static const unsigned char days_in_mo[] =
-{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
-
-/*
- * A very tiny interrupt handler. It runs with IRQF_DISABLED set.
- */
-
-irqreturn_t rtc_interrupt(int irq, void *dev_id)
-{
- /*
- * Either an alarm interrupt or update complete interrupt.
- * We store the status in the low byte and the number of
- * interrupts received since the last read in the remainder
- * of rtc_irq_data.
- */
-
- spin_lock (&rtc_lock);
-
- rtc_irq_data += 0x100;
- rtc_irq_data &= ~0xff;
- rtc_irq_data |= CMOS_READ(OMAP_RTC_STATUS_REG);
-
- if (rtc_irq_data & OMAP_RTC_STATUS_ALARM)
- CMOS_WRITE(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
-
- spin_unlock (&rtc_lock);
-
- /* Now do the rest of the actions */
- wake_up_interruptible(&rtc_wait);
-
- kill_fasync (&rtc_async_queue, SIGIO, POLL_IN);
- return IRQ_HANDLED;
-}
-
-/*
- * Now all the various file operations that we export.
- */
-
-static ssize_t rtc_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
-{
- DECLARE_WAITQUEUE(wait, current);
- unsigned long data;
- ssize_t retval;
-
- if (count < sizeof(unsigned long))
- return -EINVAL;
-
- add_wait_queue(&rtc_wait, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
-
- for (;;) {
- spin_lock_irq (&rtc_lock);
- data = rtc_irq_data;
- if (data != 0) {
- rtc_irq_data = 0;
- break;
- }
- spin_unlock_irq (&rtc_lock);
-
- if (file->f_flags & O_NONBLOCK) {
- retval = -EAGAIN;
- goto out;
- }
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- goto out;
- }
- schedule();
- }
-
- spin_unlock_irq (&rtc_lock);
- retval = put_user(data, (unsigned long __user *)buf);
- if (!retval)
- retval = sizeof(unsigned long);
- out:
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&rtc_wait, &wait);
-
- return retval;
-}
-
-/* convert from userspace struct to hardware BCD-encoded version,
- * or return error code
- */
-static int utm2bcd(struct rtc_time __user *arg, struct rtc_time *tm)
-{
- unsigned char leap_yr;
-
- if (copy_from_user(tm, arg, sizeof(struct rtc_time)))
- return -EFAULT;
-
- tm->tm_year += 1900;
- tm->tm_mon++;
-
- if (tm->tm_year < 1970)
- return -EINVAL;
-
- leap_yr = (!(tm->tm_year % 4) && (tm->tm_year % 100))
- || !(tm->tm_year % 400);
-
- if ((tm->tm_mon > 12) || (tm->tm_mday == 0))
- return -EINVAL;
-
- if (tm->tm_mday > (days_in_mo[tm->tm_mon] + ((tm->tm_mon == 2) && leap_yr)))
- return -EINVAL;
-
- if ((tm->tm_hour >= 24) || (tm->tm_min >= 60) || (tm->tm_sec >= 60))
- return -EINVAL;
-
- if ((tm->tm_year -= epoch) > 255) /* They are unsigned */
- return -EINVAL;
-
- if (tm->tm_year > 169)
- return -EINVAL;
-
- if (tm->tm_year >= 100)
- tm->tm_year -= 100;
-
- BIN_TO_BCD(tm->tm_sec);
- BIN_TO_BCD(tm->tm_min);
- BIN_TO_BCD(tm->tm_hour);
- BIN_TO_BCD(tm->tm_mday);
- BIN_TO_BCD(tm->tm_mon);
- BIN_TO_BCD(tm->tm_year);
-
- return 0;
-}
-
-static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- struct rtc_time wtime;
- int status = 0;
- u8 save_control;
-
- switch (cmd) {
- case RTC_AIE_OFF: /* Mask alarm int. enab. bit */
- mask_rtc_irq_bit(OMAP_RTC_INTERRUPTS_IT_ALARM);
- break;
- case RTC_AIE_ON: /* Allow alarm interrupts. */
- set_rtc_irq_bit(OMAP_RTC_INTERRUPTS_IT_ALARM);
- break;
- case RTC_UIE_OFF: /* Mask ints from RTC updates. */
- mask_rtc_irq_bit(OMAP_RTC_INTERRUPTS_IT_TIMER);
- break;
- case RTC_UIE_ON: /* Allow ints for RTC updates. */
- set_rtc_irq_bit(OMAP_RTC_INTERRUPTS_IT_TIMER);
- break;
- case RTC_ALM_READ: /* Read the present alarm time */
- /*
- * This returns a struct rtc_time. Reading >= 0xc0
- * means "don't care" or "match all". Only the tm_hour,
- * tm_min, and tm_sec values are filled in.
- */
- memset(&wtime, 0, sizeof(struct rtc_time));
- get_rtc_alm_time(&wtime);
- goto return_wtime;
- case RTC_ALM_SET: /* Store a time into the alarm */
- status = utm2bcd((void __user *)arg, &wtime);
- if (status != 0)
- return status;
-
- spin_lock_irq(&rtc_lock);
- CMOS_WRITE(wtime.tm_year, OMAP_RTC_ALARM_YEARS_REG);
- CMOS_WRITE(wtime.tm_mon, OMAP_RTC_ALARM_MONTHS_REG);
- CMOS_WRITE(wtime.tm_mday, OMAP_RTC_ALARM_DAYS_REG);
- CMOS_WRITE(wtime.tm_hour, OMAP_RTC_ALARM_HOURS_REG);
- CMOS_WRITE(wtime.tm_min, OMAP_RTC_ALARM_MINUTES_REG);
- CMOS_WRITE(wtime.tm_sec, OMAP_RTC_ALARM_SECONDS_REG);
- spin_unlock_irq(&rtc_lock);
-
- break;
- case RTC_RD_TIME: /* Read the time/date from RTC */
- memset(&wtime, 0, sizeof(struct rtc_time));
- get_rtc_time(&wtime);
- goto return_wtime;
- case RTC_SET_TIME: /* Set the RTC */
- if (!capable(CAP_SYS_TIME))
- return -EACCES;
-
- status = utm2bcd((void __user *)arg, &wtime);
- if (status != 0)
- return status;
-
- spin_lock_irq(&rtc_lock);
- save_control = CMOS_READ(OMAP_RTC_CTRL_REG);
- CMOS_WRITE((save_control & ~OMAP_RTC_CTRL_STOP),
- OMAP_RTC_CTRL_REG);
- CMOS_WRITE(wtime.tm_year, OMAP_RTC_YEARS_REG);
- CMOS_WRITE(wtime.tm_mon, OMAP_RTC_MONTHS_REG);
- CMOS_WRITE(wtime.tm_mday, OMAP_RTC_DAYS_REG);
- CMOS_WRITE(wtime.tm_hour, OMAP_RTC_HOURS_REG);
- CMOS_WRITE(wtime.tm_min, OMAP_RTC_MINUTES_REG);
- CMOS_WRITE(wtime.tm_sec, OMAP_RTC_SECONDS_REG);
- CMOS_WRITE((save_control | OMAP_RTC_CTRL_STOP),
- OMAP_RTC_CTRL_REG);
- spin_unlock_irq(&rtc_lock);
-
- break;
- case RTC_EPOCH_READ: /* Read the epoch. */
- status = put_user (epoch, (unsigned long __user *)arg);
- break;
- case RTC_EPOCH_SET: /* Set the epoch. */
- if (!capable(CAP_SYS_TIME))
- return -EACCES;
-
- /*
- * There were no RTC clocks before 1900.
- */
- if (arg < 1900)
- status = -EINVAL;
- else
- epoch = arg;
- break;
- default:
- status = -ENOTTY;
- }
- return status;
-
-return_wtime:
- return copy_to_user((void __user *)arg, &wtime, sizeof wtime)
- ? -EFAULT
- : 0;
-}
-
-/*
- * We enforce only one user at a time here with the open/close.
- * Also clear the previous interrupt data on an open, and clean
- * up things on a close.
- */
-
-/* We use rtc_lock to protect against concurrent opens. So the BKL is not
- * needed here. Or anywhere else in this driver. */
-static int rtc_open(struct inode *inode, struct file *file)
-{
- spin_lock_irq (&rtc_lock);
-
- if (rtc_status & RTC_IS_OPEN)
- goto out_busy;
-
- rtc_status |= RTC_IS_OPEN;
-
- rtc_irq_data = 0;
- spin_unlock_irq (&rtc_lock);
- return 0;
-
-out_busy:
- spin_unlock_irq (&rtc_lock);
- return -EBUSY;
-}
-
-static int rtc_fasync(int fd, struct file *filp, int on)
-{
- return fasync_helper (fd, filp, on, &rtc_async_queue);
-}
-
-static int rtc_release(struct inode *inode, struct file *file)
-{
- unsigned char tmp;
-
- /*
- * Turn off all interrupts once the device is no longer
- * in use, and clear the data.
- */
-
- spin_lock_irq(&rtc_lock);
- tmp = CMOS_READ(OMAP_RTC_INTERRUPTS_REG);
- tmp &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
- tmp &= ~OMAP_RTC_INTERRUPTS_IT_TIMER;
- CMOS_WRITE(tmp, OMAP_RTC_INTERRUPTS_REG);
- spin_unlock_irq(&rtc_lock);
-
- if (file->f_flags & FASYNC) {
- rtc_fasync (-1, file, 0);
- }
-
- spin_lock_irq (&rtc_lock);
- rtc_irq_data = 0;
- spin_unlock_irq (&rtc_lock);
-
- /* No need for locking -- nobody else can do anything until this rmw
- * is committed, and we don't implement timer support in omap-rtc.
- */
- rtc_status &= ~RTC_IS_OPEN;
- return 0;
-}
-
-/* Called without the kernel lock - fine */
-static unsigned int rtc_poll(struct file *file, poll_table *wait)
-{
- unsigned long l;
-
- poll_wait(file, &rtc_wait, wait);
-
- spin_lock_irq (&rtc_lock);
- l = rtc_irq_data;
- spin_unlock_irq (&rtc_lock);
-
- if (l != 0)
- return POLLIN | POLLRDNORM;
- return 0;
-}
-
-/*
- * The various file operations we support.
- */
-
-static struct file_operations rtc_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = rtc_read,
- .poll = rtc_poll,
- .ioctl = rtc_ioctl,
- .open = rtc_open,
- .release = rtc_release,
- .fasync = rtc_fasync,
-};
-
-static struct miscdevice rtc_dev = {
- .minor = RTC_MINOR,
- .name = "rtc",
- .fops = &rtc_fops,
-};
-
-static int __init omap_rtc_probe(struct platform_device *pdev)
-{
- struct resource *res, *mem;
-
- /* find the IRQs */
-
- omap_rtc_timer = platform_get_irq(pdev, 0);
- if (omap_rtc_timer <= 0) {
- dev_err(&pdev->dev, "no irq for rtc timer\n");
- return -ENOENT;
- }
-
- omap_rtc_alarm = platform_get_irq(pdev, 1);
- if (omap_rtc_alarm <= 0) {
- dev_err(&pdev->dev, "no irq for alarm\n");
- return -ENOENT;
- }
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (res)
- mem = request_mem_region(res->start,
- res->end - res->start + 1,
- pdev->name);
- else
- mem = NULL;
- if (!mem) {
- pr_debug("%s: RTC registers at %x are not free.\n",
- pdev->name, OMAP_RTC_BASE);
- return -EBUSY;
- }
- platform_set_drvdata(pdev, mem);
-
- if (CMOS_READ(OMAP_RTC_STATUS_REG) & OMAP_RTC_STATUS_POWER_UP) {
- pr_info("%s: RTC power up reset detected.\n",
- pdev->name);
- /* Clear OMAP_RTC_STATUS_POWER_UP */
- CMOS_WRITE(OMAP_RTC_STATUS_POWER_UP, OMAP_RTC_STATUS_REG);
- }
-
- if (CMOS_READ(OMAP_RTC_STATUS_REG) & OMAP_RTC_STATUS_ALARM) {
- pr_debug("%s: Clearing RTC ALARM interrupt.\n",
- pdev->name);
- /* Clear OMAP_RTC_STATUS_ALARM */
- CMOS_WRITE(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
- }
-
- if (request_irq(omap_rtc_timer, rtc_interrupt, IRQF_DISABLED,
- pdev->name, NULL)) {
- pr_debug("%s: RTC timer interrupt IRQ%d is not free.\n",
- pdev->name, omap_rtc_timer);
- goto fail;
- }
-
- if (request_irq(omap_rtc_alarm, rtc_interrupt, IRQF_DISABLED,
- pdev->name, NULL)) {
- pr_debug("%s: RTC alarm interrupt IRQ%d is not free.\n",
- pdev->name, omap_rtc_alarm);
- free_irq(omap_rtc_timer, NULL);
- goto fail;
- }
-
- /* On boards with split power, RTC_ON_NOFF resets all but the RTC */
- if (!(CMOS_READ(OMAP_RTC_CTRL_REG) & OMAP_RTC_CTRL_STOP)) {
- pr_info("%s: Enabling RTC.\n", pdev->name);
- CMOS_WRITE(OMAP_RTC_CTRL_STOP, OMAP_RTC_CTRL_REG);
- } else
- pr_info("%s: RTC already running.\n", pdev->name);
-
- spin_lock_init(&rtc_lock);
- misc_register(&rtc_dev);
- create_proc_read_entry("driver/rtc", 0, NULL, rtc_read_proc, NULL);
-
- return 0;
-
-fail:
- release_resource(mem);
- return -EIO;
-}
-
-static int omap_rtc_remove(struct platform_device *pdev)
-{
- free_irq (omap_rtc_timer, NULL);
- free_irq (omap_rtc_alarm, NULL);
-
- remove_proc_entry ("driver/rtc", NULL);
- misc_deregister(&rtc_dev);
-
- release_resource(platform_get_drvdata(pdev));
- return 0;
-}
-
-/*
- * Info exported via "/proc/driver/rtc".
- */
-
-static int rtc_proc_output (char *buf)
-{
-#define YN(value) ((value) ? "yes" : "no")
- char *p;
- struct rtc_time tm;
-
- p = buf;
-
- get_rtc_time(&tm);
-
- /*
- * There is no way to tell if the luser has the RTC set for local
- * time or for Universal Standard Time (GMT). Probably local though.
- */
- p += sprintf(p,
- "rtc_time\t: %02d:%02d:%02d\n"
- "rtc_date\t: %04d-%02d-%02d\n"
- "rtc_epoch\t: %04lu\n",
- tm.tm_hour, tm.tm_min, tm.tm_sec,
- tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, epoch);
-
- get_rtc_alm_time(&tm);
-
- /*
- * We implicitly assume 24hr mode here. Alarm values >= 0xc0 will
- * match any value for that particular field. Values that are
- * greater than a valid time, but less than 0xc0 shouldn't appear.
- */
- p += sprintf(p,
- "alarm_time\t: %02d:%02d:%02d\n"
- "alarm_date\t: %04d-%02d-%02d\n",
- tm.tm_hour, tm.tm_min, tm.tm_sec,
- tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
-
- p += sprintf(p,
- "BCD\t\t: %s\n"
- "24hr\t\t: %s\n"
- "alarm_IRQ\t: %s\n"
- "update_IRQ\t: %s\n"
- "update_rate\t: %ud\n",
- YN(1),
- YN(1),
- YN(CMOS_READ(OMAP_RTC_INTERRUPTS_REG) &
- OMAP_RTC_INTERRUPTS_IT_ALARM),
- YN(CMOS_READ(OMAP_RTC_INTERRUPTS_REG) &
- OMAP_RTC_INTERRUPTS_IT_TIMER),
- CMOS_READ(OMAP_RTC_INTERRUPTS_REG) & 3 /* REVISIT */);
-
- return p - buf;
-#undef YN
-}
-
-static int rtc_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- int len = rtc_proc_output (page);
-
- if (len <= off+count)
- *eof = 1;
- *start = page + off;
- len -= off;
- if (len > count)
- len = count;
- if (len < 0)
- len = 0;
- return len;
-}
-
-/*
- * Returns true if a clock update is in progress
- */
-static inline unsigned char rtc_is_updating(void)
-{
- unsigned char uip;
-
- spin_lock_irq(&rtc_lock);
- uip = (CMOS_READ(OMAP_RTC_STATUS_REG) & OMAP_RTC_STATUS_BUSY);
- spin_unlock_irq(&rtc_lock);
- return uip;
-}
-
-static void bcd2tm(struct rtc_time *tm)
-{
- BCD_TO_BIN(tm->tm_sec);
- BCD_TO_BIN(tm->tm_min);
- BCD_TO_BIN(tm->tm_hour);
- BCD_TO_BIN(tm->tm_mday);
- BCD_TO_BIN(tm->tm_mon);
- BCD_TO_BIN(tm->tm_year);
-
- /*
- * Account for differences between how the RTC uses the values
- * and how they are defined in a struct rtc_time;
- */
- if ((tm->tm_year += (epoch - 1900)) <= 69)
- tm->tm_year += 100;
-
- tm->tm_mon--;
-}
-
-
-static void get_rtc_time(struct rtc_time *rtc_tm)
-{
- unsigned char ctrl;
-
- /* REVISIT: Fix this comment!!!
- * read RTC once any update in progress is done. The update
- * can take just over 2ms. We wait 10 to 20ms. There is no need to
- * to poll-wait (up to 1s - eeccch) for the falling edge of OMAP_RTC_STATUS_BUSY.
- * If you need to know *exactly* when a second has started, enable
- * periodic update complete interrupts, (via ioctl) and then
- * immediately read /dev/rtc which will block until you get the IRQ.
- * Once the read clears, read the RTC time (again via ioctl). Easy.
- */
-
-#if 0 /* REVISIT: This need to do as the TRM says. */
- unsigned long uip_watchdog = jiffies;
- if (rtc_is_updating() != 0)
- while (jiffies - uip_watchdog < 2*HZ/100) {
- barrier();
- cpu_relax();
- }
-#endif
-
- /*
- * Only the values that we read from the RTC are set. We leave
- * tm_wday, tm_yday and tm_isdst untouched. Even though the
- * RTC has RTC_DAY_OF_WEEK, we ignore it, as it is only updated
- * by the RTC when initially set to a non-zero value.
- */
- spin_lock_irq(&rtc_lock);
- rtc_tm->tm_sec = CMOS_READ(OMAP_RTC_SECONDS_REG);
- rtc_tm->tm_min = CMOS_READ(OMAP_RTC_MINUTES_REG);
- rtc_tm->tm_hour = CMOS_READ(OMAP_RTC_HOURS_REG);
- rtc_tm->tm_mday = CMOS_READ(OMAP_RTC_DAYS_REG);
- rtc_tm->tm_mon = CMOS_READ(OMAP_RTC_MONTHS_REG);
- rtc_tm->tm_year = CMOS_READ(OMAP_RTC_YEARS_REG);
- ctrl = CMOS_READ(OMAP_RTC_CTRL_REG);
- spin_unlock_irq(&rtc_lock);
-
- bcd2tm(rtc_tm);
-}
-
-static void get_rtc_alm_time(struct rtc_time *alm_tm)
-{
- unsigned char ctrl;
-
- spin_lock_irq(&rtc_lock);
- alm_tm->tm_sec = CMOS_READ(OMAP_RTC_ALARM_SECONDS_REG);
- alm_tm->tm_min = CMOS_READ(OMAP_RTC_ALARM_MINUTES_REG);
- alm_tm->tm_hour = CMOS_READ(OMAP_RTC_ALARM_HOURS_REG);
- alm_tm->tm_mday = CMOS_READ(OMAP_RTC_ALARM_DAYS_REG);
- alm_tm->tm_mon = CMOS_READ(OMAP_RTC_ALARM_MONTHS_REG);
- alm_tm->tm_year = CMOS_READ(OMAP_RTC_ALARM_YEARS_REG);
- ctrl = CMOS_READ(OMAP_RTC_CTRL_REG);
- spin_unlock_irq(&rtc_lock);
-
- bcd2tm(alm_tm);
-}
-
-/*
- * Used to disable/enable UIE and AIE interrupts.
- */
-
-static void mask_rtc_irq_bit(unsigned char bit)
-{
- unsigned char val;
-
- spin_lock_irq(&rtc_lock);
- val = CMOS_READ(OMAP_RTC_INTERRUPTS_REG);
- val &= ~bit;
- CMOS_WRITE(val, OMAP_RTC_INTERRUPTS_REG);
- rtc_irq_data = 0;
- spin_unlock_irq(&rtc_lock);
-}
-
-static void set_rtc_irq_bit(unsigned char bit)
-{
- unsigned char val;
-
- spin_lock_irq(&rtc_lock);
- val = CMOS_READ(OMAP_RTC_INTERRUPTS_REG);
- val |= bit;
- CMOS_WRITE(val, OMAP_RTC_INTERRUPTS_REG);
- rtc_irq_data = 0;
- spin_unlock_irq(&rtc_lock);
-}
-
-#ifdef CONFIG_PM
-static struct timespec rtc_delta;
-
-static int omap_rtc_suspend(struct platform_device *pdev, pm_message_t state)
-{
- struct rtc_time rtc_tm;
- struct timespec time;
-
- time.tv_nsec = 0;
- get_rtc_time(&rtc_tm);
- rtc_tm_to_time(&rtc_tm, &time.tv_sec);
-
- save_time_delta(&rtc_delta, &time);
-
- return 0;
-}
-
-static int omap_rtc_resume(struct platform_device *pdev)
-{
- struct rtc_time rtc_tm;
- struct timespec time;
-
- time.tv_nsec = 0;
- get_rtc_time(&rtc_tm);
- rtc_tm_to_time(&rtc_tm, &time.tv_sec);
-
- restore_time_delta(&rtc_delta, &time);
-
- return 0;
-}
-#else
-#define omap_rtc_suspend NULL
-#define omap_rtc_resume NULL
-#endif
-
-static struct platform_driver omap_rtc_driver = {
- .probe = omap_rtc_probe,
- .remove = omap_rtc_remove,
- .suspend = omap_rtc_suspend,
- .resume = omap_rtc_resume,
- .driver = {
- .name = "omap_rtc",
- .owner = THIS_MODULE,
- },
-};
-
-static char __initdata banner[] = KERN_INFO "OMAP RTC Driver\n";
-
-static int __init rtc_init(void)
-{
- printk(banner);
- return platform_driver_register(&omap_rtc_driver);
-}
-
-static void __exit rtc_exit(void)
-{
- platform_driver_unregister(&omap_rtc_driver);
-}
-
-module_init(rtc_init);
-module_exit(rtc_exit);
-
-MODULE_AUTHOR("George G. Davis (and others)");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(RTC_MINOR);
projects / linux-2.6-omap-h63xx.git / commitdiff