diff options
Diffstat (limited to 'arch/cris')
| -rw-r--r-- | arch/cris/Kconfig | 3 | ||||
| -rw-r--r-- | arch/cris/arch-v10/drivers/pcf8563.c | 2 | ||||
| -rw-r--r-- | arch/cris/arch-v10/kernel/signal.c | 2 | ||||
| -rw-r--r-- | arch/cris/arch-v32/drivers/Makefile | 1 | ||||
| -rw-r--r-- | arch/cris/arch-v32/drivers/pcf8563.c | 377 |
5 files changed, 3 insertions, 382 deletions
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig index 04a7fc5..617925d 100644 --- a/arch/cris/Kconfig +++ b/arch/cris/Kconfig @@ -296,8 +296,7 @@ config ETRAX_RTC choice prompt "RTC chip" depends on ETRAX_RTC - default ETRAX_PCF8563 if ETRAX_ARCH_V32 - default ETRAX_DS1302 if ETRAX_ARCH_V10 + default ETRAX_DS1302 config ETRAX_DS1302 depends on ETRAX_ARCH_V10 diff --git a/arch/cris/arch-v10/drivers/pcf8563.c b/arch/cris/arch-v10/drivers/pcf8563.c index ea69fab..1391b73 100644 --- a/arch/cris/arch-v10/drivers/pcf8563.c +++ b/arch/cris/arch-v10/drivers/pcf8563.c @@ -345,7 +345,7 @@ static long pcf8563_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned int ret; mutex_lock(&pcf8563_mutex); - return pcf8563_ioctl(filp, cmd, arg); + ret = pcf8563_ioctl(filp, cmd, arg); mutex_unlock(&pcf8563_mutex); return ret; diff --git a/arch/cris/arch-v10/kernel/signal.c b/arch/cris/arch-v10/kernel/signal.c index b6be705..e78fe49 100644 --- a/arch/cris/arch-v10/kernel/signal.c +++ b/arch/cris/arch-v10/kernel/signal.c @@ -537,7 +537,7 @@ void do_signal(int canrestart, struct pt_regs *regs) RESTART_CRIS_SYS(regs); } if (regs->r10 == -ERESTART_RESTARTBLOCK) { - regs->r10 = __NR_restart_syscall; + regs->r9 = __NR_restart_syscall; regs->irp -= 2; } } diff --git a/arch/cris/arch-v32/drivers/Makefile b/arch/cris/arch-v32/drivers/Makefile index e8c0243..39aa3c1 100644 --- a/arch/cris/arch-v32/drivers/Makefile +++ b/arch/cris/arch-v32/drivers/Makefile @@ -7,7 +7,6 @@ obj-$(CONFIG_ETRAX_AXISFLASHMAP) += axisflashmap.o obj-$(CONFIG_ETRAXFS) += mach-fs/ obj-$(CONFIG_CRIS_MACH_ARTPEC3) += mach-a3/ obj-$(CONFIG_ETRAX_IOP_FW_LOAD) += iop_fw_load.o -obj-$(CONFIG_ETRAX_PCF8563) += pcf8563.o obj-$(CONFIG_ETRAX_I2C) += i2c.o obj-$(CONFIG_ETRAX_SYNCHRONOUS_SERIAL) += sync_serial.o obj-$(CONFIG_PCI) += pci/ diff --git a/arch/cris/arch-v32/drivers/pcf8563.c b/arch/cris/arch-v32/drivers/pcf8563.c deleted file mode 100644 index b6e4fc0..0000000 --- a/arch/cris/arch-v32/drivers/pcf8563.c +++ /dev/null @@ -1,377 +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, interrupt 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 byte. - * - * Copyright (c) 2002-2007, Axis Communications AB - * All rights reserved. - * - * Author: Tobias Anderberg <tobiasa@axis.com>. - * - */ - -#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/mutex.h> - -#include <asm/uaccess.h> -#include <asm/system.h> -#include <asm/io.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: 1.17 $" - -/* 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_MUTEX(pcf8563_mutex); -static DEFINE_MUTEX(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 }; - -static long pcf8563_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); - -/* Cache VL bit value read at driver init since writing the RTC_SECOND - * register clears the VL status. - */ -static int voltage_low; - -static const struct file_operations pcf8563_fops = { - .owner = THIS_MODULE, - .unlocked_ioctl = pcf8563_unlocked_ioctl, - .llseek = noop_llseek, -}; - -unsigned char -pcf8563_readreg(int reg) -{ - unsigned char res = rtc_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_WEEKDAY: - res &= 0x07; - break; - case RTC_MONTH: - res &= 0x1F; - break; - case RTC_CONTROL1: - res &= 0xA8; - break; - case RTC_CONTROL2: - res &= 0x1F; - break; - case RTC_CLOCKOUT_FREQ: - case RTC_TIMER_CONTROL: - res &= 0x83; - break; - } - return res; -} - -void -pcf8563_writereg(int reg, unsigned char val) -{ - 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_wday = rtc_read(RTC_WEEKDAY); - tm->tm_mon = rtc_read(RTC_MONTH); - tm->tm_year = rtc_read(RTC_YEAR); - - if (tm->tm_sec & 0x80) { - printk(KERN_ERR "%s: RTC Voltage Low - reliable date/time " - "information is no longer guaranteed!\n", PCF8563_NAME); - } - - tm->tm_year = bcd2bin(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_wday &= 0x07; /* Not coded in BCD. */ - tm->tm_mon &= 0x1F; - - tm->tm_sec = bcd2bin(tm->tm_sec); - tm->tm_min = bcd2bin(tm->tm_min); - tm->tm_hour = bcd2bin(tm->tm_hour); - tm->tm_mday = bcd2bin(tm->tm_mday); - tm->tm_mon = bcd2bin(tm->tm_mon); - tm->tm_mon--; /* Month is 1..12 in RTC but 0..11 in linux */ -} - -int __init -pcf8563_init(void) -{ - static int res; - static int first = 1; - - if (!first) - return res; - first = 0; - - /* Initiate the i2c protocol. */ - res = i2c_init(); - if (res < 0) { - printk(KERN_CRIT "pcf8563_init: Failed to init i2c.\n"); - return res; - } - - /* - * First of all we need to reset the chip. This is done by - * clearing control1, control2 and clk freq 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; - - if (rtc_write(RTC_TIMER_CONTROL, 0x03) < 0) - goto err; - - /* Reset the alarms. */ - if (rtc_write(RTC_MINUTE_ALARM, 0x80) < 0) - goto err; - - if (rtc_write(RTC_HOUR_ALARM, 0x80) < 0) - goto err; - - if (rtc_write(RTC_DAY_ALARM, 0x80) < 0) - goto err; - - if (rtc_write(RTC_WEEKDAY_ALARM, 0x80) < 0) - goto err; - - /* Check for low voltage, and warn about it. */ - if (rtc_read(RTC_SECONDS) & 0x80) { - voltage_low = 1; - printk(KERN_WARNING "%s: RTC Voltage Low - reliable " - "date/time information is no longer guaranteed!\n", - PCF8563_NAME); - } - - return res; - -err: - printk(KERN_INFO "%s: Error initializing chip.\n", PCF8563_NAME); - res = -1; - return res; -} - -void __exit -pcf8563_exit(void) -{ - unregister_chrdev(PCF8563_MAJOR, DEVICE_NAME); -} - -/* - * ioctl calls for this driver. Why return -ENOTTY upon error? Because - * POSIX says so! - */ -static int pcf8563_ioctl(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; - - mutex_lock(&rtc_lock); - memset(&tm, 0, sizeof tm); - get_rtc_time(&tm); - - if (copy_to_user((struct rtc_time *) arg, &tm, - sizeof tm)) { - mutex_unlock(&rtc_lock); - return -EFAULT; - } - - mutex_unlock(&rtc_lock); - - return 0; - } - case RTC_SET_TIME: - { - int leap; - int year; - int century; - struct rtc_time tm; - - memset(&tm, 0, sizeof tm); - if (!capable(CAP_SYS_TIME)) - return -EPERM; - - if (copy_from_user(&tm, (struct rtc_time *) arg, - sizeof tm)) - return -EFAULT; - - /* Convert from struct tm to struct rtc_time. */ - tm.tm_year += 1900; - tm.tm_mon += 1; - - /* - * Check if tm.tm_year is a leap year. A year is a leap - * year if it is divisible by 4 but not 100, except - * that years divisible by 400 _are_ leap years. - */ - year = tm.tm_year; - leap = (tm.tm_mon == 2) && - ((year % 4 == 0 && year % 100 != 0) || year % 400 == 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_wday >= 7) || - (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; - - tm.tm_year = bin2bcd(tm.tm_year); - tm.tm_mon = bin2bcd(tm.tm_mon); - tm.tm_mday = bin2bcd(tm.tm_mday); - tm.tm_hour = bin2bcd(tm.tm_hour); - tm.tm_min = bin2bcd(tm.tm_min); - tm.tm_sec = bin2bcd(tm.tm_sec); - tm.tm_mon |= century; - - mutex_lock(&rtc_lock); - - rtc_write(RTC_YEAR, tm.tm_year); - rtc_write(RTC_MONTH, tm.tm_mon); - rtc_write(RTC_WEEKDAY, tm.tm_wday); /* Not coded in BCD. */ - 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); - - mutex_unlock(&rtc_lock); - - return 0; - } - case RTC_VL_READ: - if (voltage_low) - printk(KERN_ERR "%s: RTC Voltage Low - " - "reliable date/time information is no " - "longer guaranteed!\n", PCF8563_NAME); - - if (copy_to_user((int *) arg, &voltage_low, sizeof(int))) - return -EFAULT; - return 0; - - case RTC_VL_CLR: - { - /* Clear the VL bit in the seconds register in case - * the time has not been set already (which would - * have cleared it). This does not really matter - * because of the cached voltage_low value but do it - * anyway for consistency. */ - - int ret = rtc_read(RTC_SECONDS); - - rtc_write(RTC_SECONDS, (ret & 0x7F)); - - /* Clear the cached value. */ - voltage_low = 0; - - return 0; - } - default: - return -ENOTTY; - } - - return 0; -} - -static long pcf8563_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) -{ - int ret; - - mutex_lock(&pcf8563_mutex); - return pcf8563_ioctl(filp, cmd, arg); - mutex_unlock(&pcf8563_mutex); - - return ret; -} - -static int __init pcf8563_register(void) -{ - if (pcf8563_init() < 0) { - printk(KERN_INFO "%s: Unable to initialize Real-Time Clock " - "Driver, %s\n", PCF8563_NAME, DRIVER_VERSION); - return -1; - } - - 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); - - /* Check for low voltage, and warn about it. */ - if (voltage_low) { - printk(KERN_WARNING "%s: RTC Voltage Low - reliable date/time " - "information is no longer guaranteed!\n", PCF8563_NAME); - } - - return 0; -} - -module_init(pcf8563_register); -module_exit(pcf8563_exit); |
