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-rw-r--r--arch/ppc64/kernel/rtc.c358
1 files changed, 0 insertions, 358 deletions
diff --git a/arch/ppc64/kernel/rtc.c b/arch/ppc64/kernel/rtc.c
deleted file mode 100644
index 79e7ed2858d..00000000000
--- a/arch/ppc64/kernel/rtc.c
+++ /dev/null
@@ -1,358 +0,0 @@
-/*
- * Real Time Clock interface for PPC64.
- *
- * Based on rtc.c by Paul Gortmaker
- *
- * This driver allows use of the real time clock
- * from user space. It exports the /dev/rtc
- * interface supporting various ioctl() and also the
- * /proc/driver/rtc pseudo-file for status information.
- *
- * Interface does not support RTC interrupts nor an alarm.
- *
- * 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.
- *
- * 1.0 Mike Corrigan: IBM iSeries rtc support
- * 1.1 Dave Engebretsen: IBM pSeries rtc support
- */
-
-#define RTC_VERSION "1.1"
-
-#include <linux/config.h>
-#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/mc146818rtc.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/proc_fs.h>
-#include <linux/spinlock.h>
-#include <linux/bcd.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/time.h>
-#include <asm/rtas.h>
-
-#include <asm/machdep.h>
-
-/*
- * We sponge a minor off of the misc major. No need slurping
- * up another valuable major dev number for this. If you add
- * an ioctl, make sure you don't conflict with SPARC's RTC
- * ioctls.
- */
-
-static ssize_t rtc_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos);
-
-static int rtc_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg);
-
-static int rtc_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data);
-
-/*
- * 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};
-
-/*
- * 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)
-{
- return -EIO;
-}
-
-static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- struct rtc_time wtime;
-
- switch (cmd) {
- case RTC_RD_TIME: /* Read the time/date from RTC */
- {
- memset(&wtime, 0, sizeof(struct rtc_time));
- ppc_md.get_rtc_time(&wtime);
- break;
- }
- case RTC_SET_TIME: /* Set the RTC */
- {
- struct rtc_time rtc_tm;
- unsigned char mon, day, hrs, min, sec, leap_yr;
- unsigned int yrs;
-
- if (!capable(CAP_SYS_TIME))
- return -EACCES;
-
- if (copy_from_user(&rtc_tm, (struct rtc_time __user *)arg,
- sizeof(struct rtc_time)))
- return -EFAULT;
-
- yrs = rtc_tm.tm_year;
- mon = rtc_tm.tm_mon + 1; /* tm_mon starts at zero */
- day = rtc_tm.tm_mday;
- hrs = rtc_tm.tm_hour;
- min = rtc_tm.tm_min;
- sec = rtc_tm.tm_sec;
-
- if (yrs < 70)
- return -EINVAL;
-
- leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));
-
- if ((mon > 12) || (day == 0))
- return -EINVAL;
-
- if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))
- return -EINVAL;
-
- if ((hrs >= 24) || (min >= 60) || (sec >= 60))
- return -EINVAL;
-
- if ( yrs > 169 )
- return -EINVAL;
-
- ppc_md.set_rtc_time(&rtc_tm);
-
- return 0;
- }
- case RTC_EPOCH_READ: /* Read the epoch. */
- {
- return put_user (epoch, (unsigned long __user *)arg);
- }
- case RTC_EPOCH_SET: /* Set the epoch. */
- {
- /*
- * There were no RTC clocks before 1900.
- */
- if (arg < 1900)
- return -EINVAL;
-
- if (!capable(CAP_SYS_TIME))
- return -EACCES;
-
- epoch = arg;
- return 0;
- }
- default:
- return -EINVAL;
- }
- return copy_to_user((void __user *)arg, &wtime, sizeof wtime) ? -EFAULT : 0;
-}
-
-static int rtc_open(struct inode *inode, struct file *file)
-{
- nonseekable_open(inode, file);
- return 0;
-}
-
-static int rtc_release(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-/*
- * The various file operations we support.
- */
-static struct file_operations rtc_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = rtc_read,
- .ioctl = rtc_ioctl,
- .open = rtc_open,
- .release = rtc_release,
-};
-
-static struct miscdevice rtc_dev = {
- .minor = RTC_MINOR,
- .name = "rtc",
- .fops = &rtc_fops
-};
-
-static int __init rtc_init(void)
-{
- int retval;
-
- retval = misc_register(&rtc_dev);
- if(retval < 0)
- return retval;
-
-#ifdef CONFIG_PROC_FS
- if (create_proc_read_entry("driver/rtc", 0, NULL, rtc_read_proc, NULL)
- == NULL) {
- misc_deregister(&rtc_dev);
- return -ENOMEM;
- }
-#endif
-
- printk(KERN_INFO "i/pSeries Real Time Clock Driver v" RTC_VERSION "\n");
-
- return 0;
-}
-
-static void __exit rtc_exit (void)
-{
- remove_proc_entry ("driver/rtc", NULL);
- misc_deregister(&rtc_dev);
-}
-
-module_init(rtc_init);
-module_exit(rtc_exit);
-
-/*
- * Info exported via "/proc/driver/rtc".
- */
-
-static int rtc_proc_output (char *buf)
-{
-
- char *p;
- struct rtc_time tm;
-
- p = buf;
-
- ppc_md.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);
-
- p += sprintf(p,
- "DST_enable\t: no\n"
- "BCD\t\t: yes\n"
- "24hr\t\t: yes\n" );
-
- return p - buf;
-}
-
-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;
-}
-
-#ifdef CONFIG_PPC_RTAS
-#define MAX_RTC_WAIT 5000 /* 5 sec */
-#define RTAS_CLOCK_BUSY (-2)
-unsigned long rtas_get_boot_time(void)
-{
- int ret[8];
- int error, wait_time;
- unsigned long max_wait_tb;
-
- max_wait_tb = __get_tb() + tb_ticks_per_usec * 1000 * MAX_RTC_WAIT;
- do {
- error = rtas_call(rtas_token("get-time-of-day"), 0, 8, ret);
- if (error == RTAS_CLOCK_BUSY || rtas_is_extended_busy(error)) {
- wait_time = rtas_extended_busy_delay_time(error);
- /* This is boot time so we spin. */
- udelay(wait_time*1000);
- error = RTAS_CLOCK_BUSY;
- }
- } while (error == RTAS_CLOCK_BUSY && (__get_tb() < max_wait_tb));
-
- if (error != 0 && printk_ratelimit()) {
- printk(KERN_WARNING "error: reading the clock failed (%d)\n",
- error);
- return 0;
- }
-
- return mktime(ret[0], ret[1], ret[2], ret[3], ret[4], ret[5]);
-}
-
-/* NOTE: get_rtc_time will get an error if executed in interrupt context
- * and if a delay is needed to read the clock. In this case we just
- * silently return without updating rtc_tm.
- */
-void rtas_get_rtc_time(struct rtc_time *rtc_tm)
-{
- int ret[8];
- int error, wait_time;
- unsigned long max_wait_tb;
-
- max_wait_tb = __get_tb() + tb_ticks_per_usec * 1000 * MAX_RTC_WAIT;
- do {
- error = rtas_call(rtas_token("get-time-of-day"), 0, 8, ret);
- if (error == RTAS_CLOCK_BUSY || rtas_is_extended_busy(error)) {
- if (in_interrupt() && printk_ratelimit()) {
- printk(KERN_WARNING "error: reading clock would delay interrupt\n");
- return; /* delay not allowed */
- }
- wait_time = rtas_extended_busy_delay_time(error);
- msleep_interruptible(wait_time);
- error = RTAS_CLOCK_BUSY;
- }
- } while (error == RTAS_CLOCK_BUSY && (__get_tb() < max_wait_tb));
-
- if (error != 0 && printk_ratelimit()) {
- printk(KERN_WARNING "error: reading the clock failed (%d)\n",
- error);
- return;
- }
-
- rtc_tm->tm_sec = ret[5];
- rtc_tm->tm_min = ret[4];
- rtc_tm->tm_hour = ret[3];
- rtc_tm->tm_mday = ret[2];
- rtc_tm->tm_mon = ret[1] - 1;
- rtc_tm->tm_year = ret[0] - 1900;
-}
-
-int rtas_set_rtc_time(struct rtc_time *tm)
-{
- int error, wait_time;
- unsigned long max_wait_tb;
-
- max_wait_tb = __get_tb() + tb_ticks_per_usec * 1000 * MAX_RTC_WAIT;
- do {
- error = rtas_call(rtas_token("set-time-of-day"), 7, 1, NULL,
- tm->tm_year + 1900, tm->tm_mon + 1,
- tm->tm_mday, tm->tm_hour, tm->tm_min,
- tm->tm_sec, 0);
- if (error == RTAS_CLOCK_BUSY || rtas_is_extended_busy(error)) {
- if (in_interrupt())
- return 1; /* probably decrementer */
- wait_time = rtas_extended_busy_delay_time(error);
- msleep_interruptible(wait_time);
- error = RTAS_CLOCK_BUSY;
- }
- } while (error == RTAS_CLOCK_BUSY && (__get_tb() < max_wait_tb));
-
- if (error != 0 && printk_ratelimit())
- printk(KERN_WARNING "error: setting the clock failed (%d)\n",
- error);
-
- return 0;
-}
-#endif
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