diff options
Diffstat (limited to 'drivers/sbus/char/rtc.c')
| -rw-r--r-- | drivers/sbus/char/rtc.c | 275 |
1 files changed, 0 insertions, 275 deletions
diff --git a/drivers/sbus/char/rtc.c b/drivers/sbus/char/rtc.c deleted file mode 100644 index b0429917154d..000000000000 --- a/drivers/sbus/char/rtc.c +++ /dev/null @@ -1,275 +0,0 @@ -/* $Id: rtc.c,v 1.28 2001/10/08 22:19:51 davem Exp $ - * - * Linux/SPARC Real Time Clock Driver - * Copyright (C) 1996 Thomas K. Dyas (tdyas@eden.rutgers.edu) - * - * This is a little driver that lets a user-level program access - * the SPARC Mostek real time clock chip. It is no use unless you - * use the modified clock utility. - * - * Get the modified clock utility from: - * ftp://vger.kernel.org/pub/linux/Sparc/userland/clock.c - */ - -#include <linux/module.h> -#include <linux/smp_lock.h> -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/miscdevice.h> -#include <linux/slab.h> -#include <linux/fcntl.h> -#include <linux/poll.h> -#include <linux/init.h> -#include <asm/io.h> -#include <asm/mostek.h> -#include <asm/system.h> -#include <asm/uaccess.h> -#include <asm/rtc.h> - -static int rtc_busy = 0; - -/* This is the structure layout used by drivers/char/rtc.c, we - * support that driver's ioctls so that things are less messy in - * userspace. - */ -struct rtc_time_generic { - int tm_sec; - int tm_min; - int tm_hour; - int tm_mday; - int tm_mon; - int tm_year; - int tm_wday; - int tm_yday; - int tm_isdst; -}; -#define RTC_AIE_ON _IO('p', 0x01) /* Alarm int. enable on */ -#define RTC_AIE_OFF _IO('p', 0x02) /* ... off */ -#define RTC_UIE_ON _IO('p', 0x03) /* Update int. enable on */ -#define RTC_UIE_OFF _IO('p', 0x04) /* ... off */ -#define RTC_PIE_ON _IO('p', 0x05) /* Periodic int. enable on */ -#define RTC_PIE_OFF _IO('p', 0x06) /* ... off */ -#define RTC_WIE_ON _IO('p', 0x0f) /* Watchdog int. enable on */ -#define RTC_WIE_OFF _IO('p', 0x10) /* ... off */ -#define RTC_RD_TIME _IOR('p', 0x09, struct rtc_time_generic) /* Read RTC time */ -#define RTC_SET_TIME _IOW('p', 0x0a, struct rtc_time_generic) /* Set RTC time */ -#define RTC_ALM_SET _IOW('p', 0x07, struct rtc_time) /* Set alarm time */ -#define RTC_ALM_READ _IOR('p', 0x08, struct rtc_time) /* Read alarm time */ -#define RTC_IRQP_READ _IOR('p', 0x0b, unsigned long) /* Read IRQ rate */ -#define RTC_IRQP_SET _IOW('p', 0x0c, unsigned long) /* Set IRQ rate */ -#define RTC_EPOCH_READ _IOR('p', 0x0d, unsigned long) /* Read epoch */ -#define RTC_EPOCH_SET _IOW('p', 0x0e, unsigned long) /* Set epoch */ -#define RTC_WKALM_SET _IOW('p', 0x0f, struct rtc_wkalrm)/* Set wakeup alarm*/ -#define RTC_WKALM_RD _IOR('p', 0x10, struct rtc_wkalrm)/* Get wakeup alarm*/ -#define RTC_PLL_GET _IOR('p', 0x11, struct rtc_pll_info) /* Get PLL correction */ -#define RTC_PLL_SET _IOW('p', 0x12, struct rtc_pll_info) /* Set PLL correction */ - -/* Retrieve the current date and time from the real time clock. */ -static void get_rtc_time(struct rtc_time *t) -{ - void __iomem *regs = mstk48t02_regs; - u8 tmp; - - spin_lock_irq(&mostek_lock); - - tmp = mostek_read(regs + MOSTEK_CREG); - tmp |= MSTK_CREG_READ; - mostek_write(regs + MOSTEK_CREG, tmp); - - t->sec = MSTK_REG_SEC(regs); - t->min = MSTK_REG_MIN(regs); - t->hour = MSTK_REG_HOUR(regs); - t->dow = MSTK_REG_DOW(regs); - t->dom = MSTK_REG_DOM(regs); - t->month = MSTK_REG_MONTH(regs); - t->year = MSTK_CVT_YEAR( MSTK_REG_YEAR(regs) ); - - tmp = mostek_read(regs + MOSTEK_CREG); - tmp &= ~MSTK_CREG_READ; - mostek_write(regs + MOSTEK_CREG, tmp); - - spin_unlock_irq(&mostek_lock); -} - -/* Set the current date and time inthe real time clock. */ -void set_rtc_time(struct rtc_time *t) -{ - void __iomem *regs = mstk48t02_regs; - u8 tmp; - - spin_lock_irq(&mostek_lock); - - tmp = mostek_read(regs + MOSTEK_CREG); - tmp |= MSTK_CREG_WRITE; - mostek_write(regs + MOSTEK_CREG, tmp); - - MSTK_SET_REG_SEC(regs,t->sec); - MSTK_SET_REG_MIN(regs,t->min); - MSTK_SET_REG_HOUR(regs,t->hour); - MSTK_SET_REG_DOW(regs,t->dow); - MSTK_SET_REG_DOM(regs,t->dom); - MSTK_SET_REG_MONTH(regs,t->month); - MSTK_SET_REG_YEAR(regs,t->year - MSTK_YEAR_ZERO); - - tmp = mostek_read(regs + MOSTEK_CREG); - tmp &= ~MSTK_CREG_WRITE; - mostek_write(regs + MOSTEK_CREG, tmp); - - spin_unlock_irq(&mostek_lock); -} - -static int put_rtc_time_generic(void __user *argp, struct rtc_time *tm) -{ - struct rtc_time_generic __user *utm = argp; - - if (__put_user(tm->sec, &utm->tm_sec) || - __put_user(tm->min, &utm->tm_min) || - __put_user(tm->hour, &utm->tm_hour) || - __put_user(tm->dom, &utm->tm_mday) || - __put_user(tm->month, &utm->tm_mon) || - __put_user(tm->year, &utm->tm_year) || - __put_user(tm->dow, &utm->tm_wday) || - __put_user(0, &utm->tm_yday) || - __put_user(0, &utm->tm_isdst)) - return -EFAULT; - - return 0; -} - -static int get_rtc_time_generic(struct rtc_time *tm, void __user *argp) -{ - struct rtc_time_generic __user *utm = argp; - - if (__get_user(tm->sec, &utm->tm_sec) || - __get_user(tm->min, &utm->tm_min) || - __get_user(tm->hour, &utm->tm_hour) || - __get_user(tm->dom, &utm->tm_mday) || - __get_user(tm->month, &utm->tm_mon) || - __get_user(tm->year, &utm->tm_year) || - __get_user(tm->dow, &utm->tm_wday)) - return -EFAULT; - - return 0; -} - -static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, - unsigned long arg) -{ - struct rtc_time rtc_tm; - void __user *argp = (void __user *)arg; - - switch (cmd) { - /* No interrupt support, return an error - * compatible with drivers/char/rtc.c - */ - case RTC_AIE_OFF: - case RTC_AIE_ON: - case RTC_PIE_OFF: - case RTC_PIE_ON: - case RTC_UIE_OFF: - case RTC_UIE_ON: - case RTC_IRQP_READ: - case RTC_IRQP_SET: - case RTC_EPOCH_SET: - case RTC_EPOCH_READ: - return -EINVAL; - - case RTCGET: - case RTC_RD_TIME: - memset(&rtc_tm, 0, sizeof(struct rtc_time)); - get_rtc_time(&rtc_tm); - - if (cmd == RTCGET) { - if (copy_to_user(argp, &rtc_tm, - sizeof(struct rtc_time))) - return -EFAULT; - } else if (put_rtc_time_generic(argp, &rtc_tm)) - return -EFAULT; - - return 0; - - - case RTCSET: - case RTC_SET_TIME: - if (!capable(CAP_SYS_TIME)) - return -EPERM; - - if (cmd == RTCSET) { - if (copy_from_user(&rtc_tm, argp, - sizeof(struct rtc_time))) - return -EFAULT; - } else if (get_rtc_time_generic(&rtc_tm, argp)) - return -EFAULT; - - set_rtc_time(&rtc_tm); - - return 0; - - default: - return -EINVAL; - } -} - -static int rtc_open(struct inode *inode, struct file *file) -{ - int ret; - - lock_kernel(); - spin_lock_irq(&mostek_lock); - if (rtc_busy) { - ret = -EBUSY; - } else { - rtc_busy = 1; - ret = 0; - } - spin_unlock_irq(&mostek_lock); - unlock_kernel(); - - return ret; -} - -static int rtc_release(struct inode *inode, struct file *file) -{ - rtc_busy = 0; - - return 0; -} - -static const struct file_operations rtc_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .ioctl = rtc_ioctl, - .open = rtc_open, - .release = rtc_release, -}; - -static struct miscdevice rtc_dev = { RTC_MINOR, "rtc", &rtc_fops }; - -static int __init rtc_sun_init(void) -{ - int error; - - /* It is possible we are being driven by some other RTC chip - * and thus another RTC driver is handling things. - */ - if (!mstk48t02_regs) - return -ENODEV; - - error = misc_register(&rtc_dev); - if (error) { - printk(KERN_ERR "rtc: unable to get misc minor for Mostek\n"); - return error; - } - printk("rtc_sun_init: Registered Mostek RTC driver.\n"); - - return 0; -} - -static void __exit rtc_sun_cleanup(void) -{ - misc_deregister(&rtc_dev); -} - -module_init(rtc_sun_init); -module_exit(rtc_sun_cleanup); -MODULE_LICENSE("GPL"); |