Commit 8d50bc14 authored by Andrzej Zaborowski's avatar Andrzej Zaborowski Committed by Tony Lindgren

Remove old OMAP RTC character-class driver

The driver comes from 2.4 when no RTC class existed.  Currently we have
drivers/rtc/rtc-omap.c which should be preferred.  Please also update
userspace and defconfig if the old driver was being used.
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent b141a8a8
...@@ -26,7 +26,7 @@ ...@@ -26,7 +26,7 @@
/*-------------------------------------------------------------------------*/ /*-------------------------------------------------------------------------*/
#if defined(CONFIG_OMAP_RTC) || defined(CONFIG_RTC_DRV_OMAP) || defined(CONFIG_RTC_DRV_OMAP_MODULE) #if defined(CONFIG_RTC_DRV_OMAP) || defined(CONFIG_RTC_DRV_OMAP_MODULE)
#define OMAP_RTC_BASE 0xfffb4800 #define OMAP_RTC_BASE 0xfffb4800
......
...@@ -841,11 +841,6 @@ config GEN_RTC_X ...@@ -841,11 +841,6 @@ config GEN_RTC_X
config EFI_RTC config EFI_RTC
bool "EFI Real Time Clock Services" bool "EFI Real Time Clock Services"
depends on IA64 depends on IA64
config OMAP_RTC
bool "TI OMAP Real Time Clock"
depends on !RTC_DRV_OMAP && (ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730)
help
Support for TI OMAP RTC
config DS1302 config DS1302
tristate "DS1302 RTC support" tristate "DS1302 RTC support"
......
...@@ -72,7 +72,6 @@ obj-$(CONFIG_GEN_RTC) += genrtc.o ...@@ -72,7 +72,6 @@ obj-$(CONFIG_GEN_RTC) += genrtc.o
obj-$(CONFIG_EFI_RTC) += efirtc.o obj-$(CONFIG_EFI_RTC) += efirtc.o
obj-$(CONFIG_SGI_DS1286) += ds1286.o obj-$(CONFIG_SGI_DS1286) += ds1286.o
obj-$(CONFIG_SGI_IP27_RTC) += ip27-rtc.o obj-$(CONFIG_SGI_IP27_RTC) += ip27-rtc.o
obj-$(CONFIG_OMAP_RTC) += omap-rtc.o
obj-$(CONFIG_DS1302) += ds1302.o obj-$(CONFIG_DS1302) += ds1302.o
ifeq ($(CONFIG_GENERIC_NVRAM),y) ifeq ($(CONFIG_GENERIC_NVRAM),y)
obj-$(CONFIG_NVRAM) += generic_nvram.o obj-$(CONFIG_NVRAM) += generic_nvram.o
......
/*
* 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);
/*
* TI OMAP Real Time Clock header file
*
* Copyright (C) 2003 TI
*
* 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.
*
*/
#define OMAP_RTC_BASE 0xfffb4800
#define OMAP_RTC_SIZE 128
#define OMAP_RTC_VIRT_BASE IO_ADDRESS(OMAP_RTC_BASE)
/*
* Real-Time Clock
*/
#define OMAP_RTC_SECONDS_REG (OMAP_RTC_BASE + 0x00)
#define OMAP_RTC_MINUTES_REG (OMAP_RTC_BASE + 0x04)
#define OMAP_RTC_HOURS_REG (OMAP_RTC_BASE + 0x08)
#define OMAP_RTC_DAYS_REG (OMAP_RTC_BASE + 0x0C)
#define OMAP_RTC_MONTHS_REG (OMAP_RTC_BASE + 0x10)
#define OMAP_RTC_YEARS_REG (OMAP_RTC_BASE + 0x14)
#define OMAP_RTC_WEEKS_REG (OMAP_RTC_BASE + 0x18)
#define OMAP_RTC_ALARM_SECONDS_REG (OMAP_RTC_BASE + 0x20)
#define OMAP_RTC_ALARM_MINUTES_REG (OMAP_RTC_BASE + 0x24)
#define OMAP_RTC_ALARM_HOURS_REG (OMAP_RTC_BASE + 0x28)
#define OMAP_RTC_ALARM_DAYS_REG (OMAP_RTC_BASE + 0x2c)
#define OMAP_RTC_ALARM_MONTHS_REG (OMAP_RTC_BASE + 0x30)
#define OMAP_RTC_ALARM_YEARS_REG (OMAP_RTC_BASE + 0x34)
#define OMAP_RTC_CTRL_REG (OMAP_RTC_BASE + 0x40)
#define OMAP_RTC_STATUS_REG (OMAP_RTC_BASE + 0x44)
#define OMAP_RTC_INTERRUPTS_REG (OMAP_RTC_BASE + 0x48)
#define OMAP_RTC_COMP_LSB_REG (OMAP_RTC_BASE + 0x4c)
#define OMAP_RTC_COMP_MSB_REG (OMAP_RTC_BASE + 0x50)
/* RTC Control Register bit fields: */
#define OMAP_RTC_CTRL_STOP (1<<0)
/* RTC Status Register bit fields: */
#define OMAP_RTC_STATUS_POWER_UP (1<<7)
#define OMAP_RTC_STATUS_ALARM (1<<6)
#define OMAP_RTC_STATUS_1D_EVENT (1<<5)
#define OMAP_RTC_STATUS_1H_EVENT (1<<4)
#define OMAP_RTC_STATUS_1M_EVENT (1<<3)
#define OMAP_RTC_STATUS_1S_EVENT (1<<2)
#define OMAP_RTC_STATUS_RUN (1<<1)
#define OMAP_RTC_STATUS_BUSY (1<<0)
/* RTC Interrupt Register bit fields: */
#define OMAP_RTC_INTERRUPTS_IT_ALARM (1<<3)
#define OMAP_RTC_INTERRUPTS_IT_TIMER (1<<2)
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