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Diffstat (limited to 'arch/cris/arch-v10/drivers/pcf8563.c')
-rw-r--r--arch/cris/arch-v10/drivers/pcf8563.c324
1 files changed, 0 insertions, 324 deletions
diff --git a/arch/cris/arch-v10/drivers/pcf8563.c b/arch/cris/arch-v10/drivers/pcf8563.c
deleted file mode 100644
index 8c830eefc89..00000000000
--- a/arch/cris/arch-v10/drivers/pcf8563.c
+++ /dev/null
@@ -1,324 +0,0 @@
-/*
- * PCF8563 RTC
- *
- * From Phillips' datasheet:
- *
- * The PCF8563 is a CMOS real-time clock/calendar optimized for low power
- * consumption. A programmable clock output, interupt output and voltage
- * low detector are also provided. All address and data are transferred
- * serially via two-line bidirectional I2C-bus. Maximum bus speed is
- * 400 kbits/s. The built-in word address register is incremented
- * automatically after each written or read bute.
- *
- * Copyright (c) 2002, Axis Communications AB
- * All rights reserved.
- *
- * Author: Tobias Anderberg <tobiasa@axis.com>.
- *
- * $Id: pcf8563.c,v 1.11 2005/03/07 13:13:07 starvik Exp $
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/ioctl.h>
-#include <linux/delay.h>
-#include <linux/bcd.h>
-#include <linux/capability.h>
-
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/arch/svinto.h>
-#include <asm/rtc.h>
-#include "i2c.h"
-
-#define PCF8563_MAJOR 121 /* Local major number. */
-#define DEVICE_NAME "rtc" /* Name which is registered in /proc/devices. */
-#define PCF8563_NAME "PCF8563"
-#define DRIVER_VERSION "$Revision: 1.11 $"
-
-/* I2C bus slave registers. */
-#define RTC_I2C_READ 0xa3
-#define RTC_I2C_WRITE 0xa2
-
-/* Two simple wrapper macros, saves a few keystrokes. */
-#define rtc_read(x) i2c_readreg(RTC_I2C_READ, x)
-#define rtc_write(x,y) i2c_writereg(RTC_I2C_WRITE, x, y)
-
-static DEFINE_SPINLOCK(rtc_lock); /* Protect state etc */
-
-static const unsigned char days_in_month[] =
- { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
-
-int pcf8563_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
-
-static struct file_operations pcf8563_fops = {
- .owner = THIS_MODULE,
- .ioctl = pcf8563_ioctl,
-};
-
-unsigned char
-pcf8563_readreg(int reg)
-{
- unsigned char res = i2c_readreg(RTC_I2C_READ, reg);
-
- /* The PCF8563 does not return 0 for unimplemented bits */
- switch(reg)
- {
- case RTC_SECONDS:
- case RTC_MINUTES:
- res &= 0x7f;
- break;
- case RTC_HOURS:
- case RTC_DAY_OF_MONTH:
- res &= 0x3f;
- break;
- case RTC_MONTH:
- res = (res & 0x1f) - 1; /* PCF8563 returns month in range 1-12 */
- break;
- }
- return res;
-}
-
-void
-pcf8563_writereg(int reg, unsigned char val)
-{
-#ifdef CONFIG_ETRAX_RTC_READONLY
- if (reg == RTC_CONTROL1 || (reg >= RTC_SECONDS && reg <= RTC_YEAR))
- return;
-#endif
-
- rtc_write(reg, val);
-}
-
-void
-get_rtc_time(struct rtc_time *tm)
-{
- tm->tm_sec = rtc_read(RTC_SECONDS);
- tm->tm_min = rtc_read(RTC_MINUTES);
- tm->tm_hour = rtc_read(RTC_HOURS);
- tm->tm_mday = rtc_read(RTC_DAY_OF_MONTH);
- tm->tm_mon = rtc_read(RTC_MONTH);
- tm->tm_year = rtc_read(RTC_YEAR);
-
- if (tm->tm_sec & 0x80)
- printk(KERN_WARNING "%s: RTC Low Voltage - date/time is not reliable!\n", PCF8563_NAME);
-
- tm->tm_year = BCD_TO_BIN(tm->tm_year) + ((tm->tm_mon & 0x80) ? 100 : 0);
- tm->tm_sec &= 0x7f;
- tm->tm_min &= 0x7f;
- tm->tm_hour &= 0x3f;
- tm->tm_mday &= 0x3f;
- tm->tm_mon &= 0x1f;
-
- 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);
- tm->tm_mon--; /* Month is 1..12 in RTC but 0..11 in linux */
-}
-
-int __init
-pcf8563_init(void)
-{
- int ret;
-
- if ((ret = i2c_init())) {
- printk(KERN_CRIT "pcf8563_init: failed to init i2c\n");
- return ret;
- }
-
- /*
- * First of all we need to reset the chip. This is done by
- * clearing control1, control2 and clk freq, clear the
- * Voltage Low bit, and resetting all alarms.
- */
- if (rtc_write(RTC_CONTROL1, 0x00) < 0)
- goto err;
-
- if (rtc_write(RTC_CONTROL2, 0x00) < 0)
- goto err;
-
- if (rtc_write(RTC_CLOCKOUT_FREQ, 0x00) < 0)
- goto err;
-
- /* Clear the VL bit in the seconds register. */
- ret = rtc_read(RTC_SECONDS);
-
- if (rtc_write(RTC_SECONDS, (ret & 0x7f)) < 0)
- goto err;
-
- /* Reset the alarms. */
- if (rtc_write(RTC_MINUTE_ALARM, 0x00) < 0)
- goto err;
-
- if (rtc_write(RTC_HOUR_ALARM, 0x00) < 0)
- goto err;
-
- if (rtc_write(RTC_DAY_ALARM, 0x00) < 0)
- goto err;
-
- if (rtc_write(RTC_WEEKDAY_ALARM, 0x00) < 0)
- goto err;
-
- /* Check for low voltage, and warn about it.. */
- if (rtc_read(RTC_SECONDS) & 0x80)
- printk(KERN_WARNING "%s: RTC Low Voltage - date/time is not reliable!\n", PCF8563_NAME);
-
- return 0;
-
-err:
- printk(KERN_INFO "%s: Error initializing chip.\n", PCF8563_NAME);
- return -1;
-}
-
-void __exit
-pcf8563_exit(void)
-{
- if (unregister_chrdev(PCF8563_MAJOR, DEVICE_NAME) < 0) {
- printk(KERN_INFO "%s: Unable to unregister device.\n", PCF8563_NAME);
- }
-}
-
-/*
- * ioctl calls for this driver. Why return -ENOTTY upon error? Because
- * POSIX says so!
- */
-int
-pcf8563_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg)
-{
- /* Some sanity checks. */
- if (_IOC_TYPE(cmd) != RTC_MAGIC)
- return -ENOTTY;
-
- if (_IOC_NR(cmd) > RTC_MAX_IOCTL)
- return -ENOTTY;
-
- switch (cmd) {
- case RTC_RD_TIME:
- {
- struct rtc_time tm;
-
- spin_lock(&rtc_lock);
- get_rtc_time(&tm);
-
- if (copy_to_user((struct rtc_time *) arg, &tm, sizeof(struct rtc_time))) {
- spin_unlock(&rtc_lock);
- return -EFAULT;
- }
-
- spin_unlock(&rtc_lock);
- return 0;
- }
- break;
- case RTC_SET_TIME:
- {
-#ifdef CONFIG_ETRAX_RTC_READONLY
- return -EPERM;
-#else
- int leap;
- int century;
- struct rtc_time tm;
-
- memset(&tm, 0, sizeof (struct rtc_time));
- if (!capable(CAP_SYS_TIME))
- return -EPERM;
-
- if (copy_from_user(&tm, (struct rtc_time *) arg, sizeof(struct rtc_time)))
- return -EFAULT;
-
- /* Convert from struct tm to struct rtc_time. */
- tm.tm_year += 1900;
- tm.tm_mon += 1;
-
- leap = ((tm.tm_mon == 2) && ((tm.tm_year % 4) == 0)) ? 1 : 0;
-
- /* Perform some sanity checks. */
- if ((tm.tm_year < 1970) ||
- (tm.tm_mon > 12) ||
- (tm.tm_mday == 0) ||
- (tm.tm_mday > days_in_month[tm.tm_mon] + leap) ||
- (tm.tm_hour >= 24) ||
- (tm.tm_min >= 60) ||
- (tm.tm_sec >= 60))
- return -EINVAL;
-
- century = (tm.tm_year >= 2000) ? 0x80 : 0;
- tm.tm_year = tm.tm_year % 100;
-
- BIN_TO_BCD(tm.tm_year);
- BIN_TO_BCD(tm.tm_mday);
- BIN_TO_BCD(tm.tm_hour);
- BIN_TO_BCD(tm.tm_min);
- BIN_TO_BCD(tm.tm_sec);
- tm.tm_mon |= century;
-
- spin_lock(&rtc_lock);
-
- rtc_write(RTC_YEAR, tm.tm_year);
- rtc_write(RTC_MONTH, tm.tm_mon);
- rtc_write(RTC_DAY_OF_MONTH, tm.tm_mday);
- rtc_write(RTC_HOURS, tm.tm_hour);
- rtc_write(RTC_MINUTES, tm.tm_min);
- rtc_write(RTC_SECONDS, tm.tm_sec);
-
- spin_unlock(&rtc_lock);
-
- return 0;
-#endif /* !CONFIG_ETRAX_RTC_READONLY */
- }
-
- case RTC_VLOW_RD:
- {
- int vl_bit = 0;
-
- if (rtc_read(RTC_SECONDS) & 0x80) {
- vl_bit = 1;
- printk(KERN_WARNING "%s: RTC Voltage Low - reliable "
- "date/time information is no longer guaranteed!\n",
- PCF8563_NAME);
- }
- if (copy_to_user((int *) arg, &vl_bit, sizeof(int)))
- return -EFAULT;
-
- return 0;
- }
-
- case RTC_VLOW_SET:
- {
- /* Clear the VL bit in the seconds register */
- int ret = rtc_read(RTC_SECONDS);
-
- rtc_write(RTC_SECONDS, (ret & 0x7F));
-
- return 0;
- }
-
- default:
- return -ENOTTY;
- }
-
- return 0;
-}
-
-static int __init
-pcf8563_register(void)
-{
- pcf8563_init();
- if (register_chrdev(PCF8563_MAJOR, DEVICE_NAME, &pcf8563_fops) < 0) {
- printk(KERN_INFO "%s: Unable to get major numer %d for RTC device.\n",
- PCF8563_NAME, PCF8563_MAJOR);
- return -1;
- }
-
- printk(KERN_INFO "%s Real-Time Clock Driver, %s\n", PCF8563_NAME, DRIVER_VERSION);
- return 0;
-}
-
-module_init(pcf8563_register);
-module_exit(pcf8563_exit);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2026-01-08 20:33:01 +0000