diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/Kconfig | 91 | ||||
| -rw-r--r-- | drivers/rtc/Makefile | 8 | ||||
| -rw-r--r-- | drivers/rtc/class.c | 1 | ||||
| -rw-r--r-- | drivers/rtc/interface.c | 22 | ||||
| -rw-r--r-- | drivers/rtc/rtc-at91.c | 407 | ||||
| -rw-r--r-- | drivers/rtc/rtc-dev.c | 131 | ||||
| -rw-r--r-- | drivers/rtc/rtc-ds1307.c | 388 | ||||
| -rw-r--r-- | drivers/rtc/rtc-ds1553.c | 414 | ||||
| -rw-r--r-- | drivers/rtc/rtc-ds1742.c | 259 | ||||
| -rw-r--r-- | drivers/rtc/rtc-lib.c | 19 | ||||
| -rw-r--r-- | drivers/rtc/rtc-max6902.c | 286 | ||||
| -rw-r--r-- | drivers/rtc/rtc-pcf8583.c | 394 | ||||
| -rw-r--r-- | drivers/rtc/rtc-pl031.c | 233 | ||||
| -rw-r--r-- | drivers/rtc/rtc-sa1100.c | 4 | ||||
| -rw-r--r-- | drivers/rtc/rtc-v3020.c | 264 | ||||
| -rw-r--r-- | drivers/rtc/rtc-vr41xx.c | 8 |
16 files changed, 2894 insertions, 35 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 65d090d..bccff40 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -73,6 +73,13 @@ config RTC_INTF_DEV This driver can also be built as a module. If so, the module will be called rtc-dev. +config RTC_INTF_DEV_UIE_EMUL + bool "RTC UIE emulation on dev interface" + depends on RTC_INTF_DEV + help + Provides an emulation for RTC_UIE if the underlaying rtc chip + driver did not provide RTC_UIE ioctls. + comment "RTC drivers" depends on RTC_CLASS @@ -86,6 +93,34 @@ config RTC_DRV_X1205 This driver can also be built as a module. If so, the module will be called rtc-x1205. +config RTC_DRV_DS1307 + tristate "Dallas/Maxim DS1307 and similar I2C RTC chips" + depends on RTC_CLASS && I2C + help + If you say yes here you get support for various compatible RTC + chips (often with battery backup) connected with I2C. This driver + should handle DS1307, DS1337, DS1338, DS1339, DS1340, ST M41T00, + and probably other chips. In some cases the RTC must already + have been initialized (by manufacturing or a bootloader). + + The first seven registers on these chips hold an RTC, and other + registers may add features such as NVRAM, a trickle charger for + the RTC/NVRAM backup power, and alarms. This driver may not + expose all those available chip features. + + This driver can also be built as a module. If so, the module + will be called rtc-ds1307. + +config RTC_DRV_DS1553 + tristate "Dallas DS1553" + depends on RTC_CLASS + help + If you say yes here you get support for the + Dallas DS1553 timekeeping chip. + + This driver can also be built as a module. If so, the module + will be called rtc-ds1553. + config RTC_DRV_DS1672 tristate "Dallas/Maxim DS1672" depends on RTC_CLASS && I2C @@ -96,6 +131,16 @@ config RTC_DRV_DS1672 This driver can also be built as a module. If so, the module will be called rtc-ds1672. +config RTC_DRV_DS1742 + tristate "Dallas DS1742" + depends on RTC_CLASS + help + If you say yes here you get support for the + Dallas DS1742 timekeeping chip. + + This driver can also be built as a module. If so, the module + will be called rtc-ds1742. + config RTC_DRV_PCF8563 tristate "Philips PCF8563/Epson RTC8564" depends on RTC_CLASS && I2C @@ -107,6 +152,16 @@ config RTC_DRV_PCF8563 This driver can also be built as a module. If so, the module will be called rtc-pcf8563. +config RTC_DRV_PCF8583 + tristate "Philips PCF8583" + depends on RTC_CLASS && I2C + help + If you say yes here you get support for the + Philips PCF8583 RTC chip. + + This driver can also be built as a module. If so, the module + will be called rtc-pcf8583. + config RTC_DRV_RS5C372 tristate "Ricoh RS5C372A/B" depends on RTC_CLASS && I2C @@ -157,6 +212,22 @@ config RTC_DRV_VR41XX To compile this driver as a module, choose M here: the module will be called rtc-vr41xx. +config RTC_DRV_PL031 + tristate "ARM AMBA PL031 RTC" + depends on RTC_CLASS && ARM_AMBA + help + If you say Y here you will get access to ARM AMBA + PrimeCell PL031 UART found on certain ARM SOCs. + + To compile this driver as a module, choose M here: the + module will be called rtc-pl031. + +config RTC_DRV_AT91 + tristate "AT91RM9200" + depends on RTC_CLASS && ARCH_AT91RM9200 + help + Driver for the Atmel AT91RM9200's internal RTC (Realtime Clock). + config RTC_DRV_TEST tristate "Test driver/device" depends on RTC_CLASS @@ -172,4 +243,24 @@ config RTC_DRV_TEST This driver can also be built as a module. If so, the module will be called rtc-test. +config RTC_DRV_MAX6902 + tristate "Maxim 6902" + depends on RTC_CLASS && SPI + help + If you say yes here you will get support for the + Maxim MAX6902 spi RTC chip. + + This driver can also be built as a module. If so, the module + will be called rtc-max6902. + +config RTC_DRV_V3020 + tristate "EM Microelectronic V3020" + depends on RTC_CLASS + help + If you say yes here you will get support for the + EM Microelectronic v3020 RTC chip. + + This driver can also be built as a module. If so, the module + will be called rtc-v3020. + endmenu diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index a9ca0f1..900d210 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -13,10 +13,18 @@ obj-$(CONFIG_RTC_INTF_DEV) += rtc-dev.o obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o +obj-$(CONFIG_RTC_DRV_DS1307) += rtc-ds1307.o obj-$(CONFIG_RTC_DRV_DS1672) += rtc-ds1672.o +obj-$(CONFIG_RTC_DRV_DS1742) += rtc-ds1742.o obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o +obj-$(CONFIG_RTC_DRV_PCF8583) += rtc-pcf8583.o obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o obj-$(CONFIG_RTC_DRV_M48T86) += rtc-m48t86.o +obj-$(CONFIG_RTC_DRV_DS1553) += rtc-ds1553.o obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o obj-$(CONFIG_RTC_DRV_SA1100) += rtc-sa1100.o obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o +obj-$(CONFIG_RTC_DRV_PL031) += rtc-pl031.o +obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o +obj-$(CONFIG_RTC_DRV_V3020) += rtc-v3020.o +obj-$(CONFIG_RTC_DRV_AT91) += rtc-at91.o diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c index 413c7d5..5396bee 100644 --- a/drivers/rtc/class.c +++ b/drivers/rtc/class.c @@ -69,6 +69,7 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev, rtc->id = id; rtc->ops = ops; rtc->owner = owner; + rtc->max_user_freq = 64; rtc->class_dev.dev = dev; rtc->class_dev.class = rtc_class; rtc->class_dev.release = rtc_device_release; diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index 56e4907..579cd66 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -229,6 +229,9 @@ int rtc_irq_set_state(struct class_device *class_dev, struct rtc_task *task, int unsigned long flags; struct rtc_device *rtc = to_rtc_device(class_dev); + if (rtc->ops->irq_set_state == NULL) + return -ENXIO; + spin_lock_irqsave(&rtc->irq_task_lock, flags); if (rtc->irq_task != task) err = -ENXIO; @@ -243,25 +246,12 @@ EXPORT_SYMBOL_GPL(rtc_irq_set_state); int rtc_irq_set_freq(struct class_device *class_dev, struct rtc_task *task, int freq) { - int err = 0, tmp = 0; + int err = 0; unsigned long flags; struct rtc_device *rtc = to_rtc_device(class_dev); - /* allowed range is 2-8192 */ - if (freq < 2 || freq > 8192) - return -EINVAL; -/* - FIXME: this does not belong here, will move where appropriate - at a later stage. It cannot hurt right now, trust me :) - if ((freq > rtc_max_user_freq) && (!capable(CAP_SYS_RESOURCE))) - return -EACCES; -*/ - /* check if freq is a power of 2 */ - while (freq > (1 << tmp)) - tmp++; - - if (freq != (1 << tmp)) - return -EINVAL; + if (rtc->ops->irq_set_freq == NULL) + return -ENXIO; spin_lock_irqsave(&rtc->irq_task_lock, flags); if (rtc->irq_task != task) diff --git a/drivers/rtc/rtc-at91.c b/drivers/rtc/rtc-at91.c new file mode 100644 index 0000000..b676f44 --- /dev/null +++ b/drivers/rtc/rtc-at91.c @@ -0,0 +1,407 @@ +/* + * Real Time Clock interface for Linux on Atmel AT91RM9200 + * + * Copyright (C) 2002 Rick Bronson + * + * Converted to RTC class model by Andrew Victor + * + * Ported to Linux 2.6 by Steven Scholz + * Based on s3c2410-rtc.c Simtec Electronics + * + * Based on sa1100-rtc.c by Nils Faerber + * Based on rtc.c by Paul Gortmaker + * + * 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. + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/time.h> +#include <linux/rtc.h> +#include <linux/bcd.h> +#include <linux/interrupt.h> +#include <linux/ioctl.h> +#include <linux/completion.h> + +#include <asm/uaccess.h> +#include <asm/rtc.h> + +#include <asm/mach/time.h> + + +#define AT91_RTC_FREQ 1 +#define AT91_RTC_EPOCH 1900UL /* just like arch/arm/common/rtctime.c */ + +static DECLARE_COMPLETION(at91_rtc_updated); +static unsigned int at91_alarm_year = AT91_RTC_EPOCH; + +/* + * Decode time/date into rtc_time structure + */ +static void at91_rtc_decodetime(unsigned int timereg, unsigned int calreg, + struct rtc_time *tm) +{ + unsigned int time, date; + + /* must read twice in case it changes */ + do { + time = at91_sys_read(timereg); + date = at91_sys_read(calreg); + } while ((time != at91_sys_read(timereg)) || + (date != at91_sys_read(calreg))); + + tm->tm_sec = BCD2BIN((time & AT91_RTC_SEC) >> 0); + tm->tm_min = BCD2BIN((time & AT91_RTC_MIN) >> 8); + tm->tm_hour = BCD2BIN((time & AT91_RTC_HOUR) >> 16); + + /* + * The Calendar Alarm register does not have a field for + * the year - so these will return an invalid value. When an + * alarm is set, at91_alarm_year wille store the current year. + */ + tm->tm_year = BCD2BIN(date & AT91_RTC_CENT) * 100; /* century */ + tm->tm_year += BCD2BIN((date & AT91_RTC_YEAR) >> 8); /* year */ + + tm->tm_wday = BCD2BIN((date & AT91_RTC_DAY) >> 21) - 1; /* day of the week [0-6], Sunday=0 */ + tm->tm_mon = BCD2BIN((date & AT91_RTC_MONTH) >> 16) - 1; + tm->tm_mday = BCD2BIN((date & AT91_RTC_DATE) >> 24); +} + +/* + * Read current time and date in RTC + */ +static int at91_rtc_readtime(struct device *dev, struct rtc_time *tm) +{ + at91_rtc_decodetime(AT91_RTC_TIMR, AT91_RTC_CALR, tm); + tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year); + tm->tm_year = tm->tm_year - 1900; + + pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __FUNCTION__, + 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, + tm->tm_hour, tm->tm_min, tm->tm_sec); + + return 0; +} + +/* + * Set current time and date in RTC + */ +static int at91_rtc_settime(struct device *dev, struct rtc_time *tm) +{ + unsigned long cr; + + pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __FUNCTION__, + 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, + tm->tm_hour, tm->tm_min, tm->tm_sec); + + /* Stop Time/Calendar from counting */ + cr = at91_sys_read(AT91_RTC_CR); + at91_sys_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM); + + at91_sys_write(AT91_RTC_IER, AT91_RTC_ACKUPD); + wait_for_completion(&at91_rtc_updated); /* wait for ACKUPD interrupt */ + at91_sys_write(AT91_RTC_IDR, AT91_RTC_ACKUPD); + + at91_sys_write(AT91_RTC_TIMR, + BIN2BCD(tm->tm_sec) << 0 + | BIN2BCD(tm->tm_min) << 8 + | BIN2BCD(tm->tm_hour) << 16); + + at91_sys_write(AT91_RTC_CALR, + BIN2BCD((tm->tm_year + 1900) / 100) /* century */ + | BIN2BCD(tm->tm_year % 100) << 8 /* year */ + | BIN2BCD(tm->tm_mon + 1) << 16 /* tm_mon starts at zero */ + | BIN2BCD(tm->tm_wday + 1) << 21 /* day of the week [0-6], Sunday=0 */ + | BIN2BCD(tm->tm_mday) << 24); + + /* Restart Time/Calendar */ + cr = at91_sys_read(AT91_RTC_CR); + at91_sys_write(AT91_RTC_CR, cr & ~(AT91_RTC_UPDCAL | AT91_RTC_UPDTIM)); + + return 0; +} + +/* + * Read alarm time and date in RTC + */ +static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct rtc_time *tm = &alrm->time; + + at91_rtc_decodetime(AT91_RTC_TIMALR, AT91_RTC_CALALR, tm); + tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year); + tm->tm_year = at91_alarm_year - 1900; + + pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __FUNCTION__, + 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, + tm->tm_hour, tm->tm_min, tm->tm_sec); + + return 0; +} + +/* + * Set alarm time and date in RTC + */ +static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct rtc_time tm; + + at91_rtc_decodetime(AT91_RTC_TIMR, AT91_RTC_CALR, &tm); + + at91_alarm_year = tm.tm_year; + + tm.tm_hour = alrm->time.tm_hour; + tm.tm_min = alrm->time.tm_min; + tm.tm_sec = alrm->time.tm_sec; + + at91_sys_write(AT91_RTC_TIMALR, + BIN2BCD(tm.tm_sec) << 0 + | BIN2BCD(tm.tm_min) << 8 + | BIN2BCD(tm.tm_hour) << 16 + | AT91_RTC_HOUREN | AT91_RTC_MINEN | AT91_RTC_SECEN); + at91_sys_write(AT91_RTC_CALALR, + BIN2BCD(tm.tm_mon + 1) << 16 /* tm_mon starts at zero */ + | BIN2BCD(tm.tm_mday) << 24 + | AT91_RTC_DATEEN | AT91_RTC_MTHEN); + + pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __FUNCTION__, + at91_alarm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour, + tm.tm_min, tm.tm_sec); + + return 0; +} + +/* + * Handle commands from user-space + */ +static int at91_rtc_ioctl(struct device *dev, unsigned int cmd, + unsigned long arg) +{ + int ret = 0; + + pr_debug("%s(): cmd=%08x, arg=%08lx.\n", __FUNCTION__, cmd, arg); + + switch (cmd) { + case RTC_AIE_OFF: /* alarm off */ + at91_sys_write(AT91_RTC_IDR, AT91_RTC_ALARM); + break; + case RTC_AIE_ON: /* alarm on */ + at91_sys_write(AT91_RTC_IER, AT91_RTC_ALARM); + break; + case RTC_UIE_OFF: /* update off */ + case RTC_PIE_OFF: /* periodic off */ + at91_sys_write(AT91_RTC_IDR, AT91_RTC_SECEV); + break; + case RTC_UIE_ON: /* update on */ + case RTC_PIE_ON: /* periodic on */ + at91_sys_write(AT91_RTC_IER, AT91_RTC_SECEV); + break; + case RTC_IRQP_READ: /* read periodic alarm frequency */ + ret = put_user(AT91_RTC_FREQ, (unsigned long *) arg); + break; + case RTC_IRQP_SET: /* set periodic alarm frequency */ + if (arg != AT91_RTC_FREQ) + ret = -EINVAL; + break; + default: + ret = -ENOIOCTLCMD; + break; + } + + return ret; +} + +/* + * Provide additional RTC information in /proc/driver/rtc + */ +static int at91_rtc_proc(struct device *dev, struct seq_file *seq) +{ + unsigned long imr = at91_sys_read(AT91_RTC_IMR); + + seq_printf(seq, "alarm_IRQ\t: %s\n", + (imr & AT91_RTC_ALARM) ? "yes" : "no"); + seq_printf(seq, "update_IRQ\t: %s\n", + (imr & AT91_RTC_ACKUPD) ? "yes" : "no"); + seq_printf(seq, "periodic_IRQ\t: %s\n", + (imr & AT91_RTC_SECEV) ? "yes" : "no"); + seq_printf(seq, "periodic_freq\t: %ld\n", + (unsigned long) AT91_RTC_FREQ); + + return 0; +} + +/* + * IRQ handler for the RTC + */ +static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id, + struct pt_regs *regs) +{ + struct platform_device *pdev = dev_id; + struct rtc_device *rtc = platform_get_drvdata(pdev); + unsigned int rtsr; + unsigned long events = 0; + + rtsr = at91_sys_read(AT91_RTC_SR) & at91_sys_read(AT91_RTC_IMR); + if (rtsr) { /* this interrupt is shared! Is it ours? */ + if (rtsr & AT91_RTC_ALARM) + events |= (RTC_AF | RTC_IRQF); + if (rtsr & AT91_RTC_SECEV) + events |= (RTC_UF | RTC_IRQF); + if (rtsr & AT91_RTC_ACKUPD) + complete(&at91_rtc_updated); + + at91_sys_write(AT91_RTC_SCCR, rtsr); /* clear status reg */ + + rtc_update_irq(&rtc->class_dev, 1, events); + + pr_debug("%s(): num=%ld, events=0x%02lx\n", __FUNCTION__, + events >> 8, events & 0x000000FF); + + return IRQ_HANDLED; + } + return IRQ_NONE; /* not handled */ +} + +static struct rtc_class_ops at91_rtc_ops = { + .ioctl = at91_rtc_ioctl, + .read_time = at91_rtc_readtime, + .set_time = at91_rtc_settime, + .read_alarm = at91_rtc_readalarm, + .set_alarm = at91_rtc_setalarm, + .proc = at91_rtc_proc, +}; + +/* + * Initialize and install RTC driver + */ +static int __init at91_rtc_probe(struct platform_device *pdev) +{ + struct rtc_device *rtc; + int ret; + + at91_sys_write(AT91_RTC_CR, 0); + at91_sys_write(AT91_RTC_MR, 0); /* 24 hour mode */ + + /* Disable all interrupts */ + at91_sys_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM | + AT91_RTC_SECEV | AT91_RTC_TIMEV | + AT91_RTC_CALEV); + + ret = request_irq(AT91_ID_SYS, at91_rtc_interrupt, + SA_SHIRQ, "at91_rtc", pdev); + if (ret) { + printk(KERN_ERR "at91_rtc: IRQ %d already in use.\n", + AT91_ID_SYS); + return ret; + } + + rtc = rtc_device_register(pdev->name, &pdev->dev, + &at91_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) { + free_irq(AT91_ID_SYS, pdev); + return PTR_ERR(rtc); + } + platform_set_drvdata(pdev, rtc); + + printk(KERN_INFO "AT91 Real Time Clock driver.\n"); + return 0; +} + +/* + * Disable and remove the RTC driver + */ +static int __devexit at91_rtc_remove(struct platform_device *pdev) +{ + struct rtc_device *rtc = platform_get_drvdata(pdev); + + /* Disable all interrupts */ + at91_sys_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM | + AT91_RTC_SECEV | AT91_RTC_TIMEV | + AT91_RTC_CALEV); + free_irq(AT91_ID_SYS, pdev); + + rtc_device_unregister(rtc); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +#ifdef CONFIG_PM + +/* AT91RM9200 RTC Power management control */ + +static struct timespec at91_rtc_delta; + +static int at91_rtc_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct rtc_time tm; + struct timespec time; + + time.tv_nsec = 0; + + /* calculate time delta for suspend */ + at91_rtc_readtime(&pdev->dev, &tm); + rtc_tm_to_time(&tm, &time.tv_sec); + save_time_delta(&at91_rtc_delta, &time); + + pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __FUNCTION__, + 1900 + tm.tm_year, tm.tm_mon, tm.tm_mday, + tm.tm_hour, tm.tm_min, tm.tm_sec); + + return 0; +} + +static int at91_rtc_resume(struct platform_device *pdev) +{ + struct rtc_time tm; + struct timespec time; + + time.tv_nsec = 0; + + at91_rtc_readtime(&pdev->dev, &tm); + rtc_tm_to_time(&tm, &time.tv_sec); + restore_time_delta(&at91_rtc_delta, &time); + + pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __FUNCTION__, + 1900 + tm.tm_year, tm.tm_mon, tm.tm_mday, + tm.tm_hour, tm.tm_min, tm.tm_sec); + + return 0; +} +#else +#define at91_rtc_suspend NULL +#define at91_rtc_resume NULL +#endif + +static struct platform_driver at91_rtc_driver = { + .probe = at91_rtc_probe, + .remove = at91_rtc_remove, + .suspend = at91_rtc_suspend, + .resume = at91_rtc_resume, + .driver = { + .name = "at91_rtc", + .owner = THIS_MODULE, + }, +}; + +static int __init at91_rtc_init(void) +{ + return platform_driver_register(&at91_rtc_driver); +} + +static void __exit at91_rtc_exit(void) +{ + platform_driver_unregister(&at91_rtc_driver); +} + +module_init(at91_rtc_init); +module_exit(at91_rtc_exit); + +MODULE_AUTHOR("Rick Bronson"); +MODULE_DESCRIPTION("RTC driver for Atmel AT91RM9200"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c index 2011567..61a5825 100644 --- a/drivers/rtc/rtc-dev.c +++ b/drivers/rtc/rtc-dev.c @@ -48,6 +48,93 @@ static int rtc_dev_open(struct inode *inode, struct file *file) return err; } +#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL +/* + * Routine to poll RTC seconds field for change as often as possible, + * after first RTC_UIE use timer to reduce polling + */ +static void rtc_uie_task(void *data) +{ + struct rtc_device *rtc = data; + struct rtc_time tm; + int num = 0; + int err; + + err = rtc_read_time(&rtc->class_dev, &tm); + spin_lock_irq(&rtc->irq_lock); + if (rtc->stop_uie_polling || err) { + rtc->uie_task_active = 0; + } else if (rtc->oldsecs != tm.tm_sec) { + num = (tm.tm_sec + 60 - rtc->oldsecs) % 60; + rtc->oldsecs = tm.tm_sec; + rtc->uie_timer.expires = jiffies + HZ - (HZ/10); + rtc->uie_timer_active = 1; + rtc->uie_task_active = 0; + add_timer(&rtc->uie_timer); + } else if (schedule_work(&rtc->uie_task) == 0) { + rtc->uie_task_active = 0; + } + spin_unlock_irq(&rtc->irq_lock); + if (num) + rtc_update_irq(&rtc->class_dev, num, RTC_UF | RTC_IRQF); +} + +static void rtc_uie_timer(unsigned long data) +{ + struct rtc_device *rtc = (struct rtc_device *)data; + unsigned long flags; + + spin_lock_irqsave(&rtc->irq_lock, flags); + rtc->uie_timer_active = 0; + rtc->uie_task_active = 1; + if ((schedule_work(&rtc->uie_task) == 0)) + rtc->uie_task_active = 0; + spin_unlock_irqrestore(&rtc->irq_lock, flags); +} + +static void clear_uie(struct rtc_device *rtc) +{ + spin_lock_irq(&rtc->irq_lock); + if (rtc->irq_active) { + rtc->stop_uie_polling = 1; + if (rtc->uie_timer_active) { + spin_unlock_irq(&rtc->irq_lock); + del_timer_sync(&rtc->uie_timer); + spin_lock_irq(&rtc->irq_lock); + rtc->uie_timer_active = 0; + } + if (rtc->uie_task_active) { + spin_unlock_irq(&rtc->irq_lock); + flush_scheduled_work(); + spin_lock_irq(&rtc->irq_lock); + } + rtc->irq_active = 0; + } + spin_unlock_irq(&rtc->irq_lock); +} + +static int set_uie(struct rtc_device *rtc) +{ + struct rtc_time tm; + int err; + + err = rtc_read_time(&rtc->class_dev, &tm); + if (err) + return err; + spin_lock_irq(&rtc->irq_lock); + if (!rtc->irq_active) { + rtc->irq_active = 1; + rtc->stop_uie_polling = 0; + rtc->oldsecs = tm.tm_sec; + rtc->uie_task_active = 1; + if (schedule_work(&rtc->uie_task) == 0) + rtc->uie_task_active = 0; + } + rtc->irq_data = 0; + spin_unlock_irq(&rtc->irq_lock); + return 0; +} +#endif /* CONFIG_RTC_INTF_DEV_UIE_EMUL */ static ssize_t rtc_dev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) @@ -127,6 +214,28 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file, struct rtc_wkalrm alarm; void __user *uarg = (void __user *) arg; + /* check that the calles has appropriate permissions + * for certain ioctls. doing this check here is useful + * to avoid duplicate code in each driver. + */ + switch (cmd) { + case RTC_EPOCH_SET: + case RTC_SET_TIME: + if (!capable(CAP_SYS_TIME)) + return -EACCES; + break; + + case RTC_IRQP_SET: + if (arg > rtc->max_user_freq && !capable(CAP_SYS_RESOURCE)) + return -EACCES; + break; + + case RTC_PIE_ON: + if (!capable(CAP_SYS_RESOURCE)) + return -EACCES; + break; + } + /* avoid conflicting IRQ users */ if (cmd == RTC_PIE_ON || cmd == RTC_PIE_OFF || cmd == RTC_IRQP_SET) { spin_lock(&rtc->irq_task_lock); @@ -185,9 +294,6 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file, break; case RTC_SET_TIME: - if (!capable(CAP_SYS_TIME)) - return -EACCES; - if (copy_from_user(&tm, uarg, sizeof(tm))) return -EFAULT; @@ -203,10 +309,6 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file, err = -EINVAL; break; } - if (!capable(CAP_SYS_TIME)) { - err = -EACCES; - break; - } rtc_epoch = arg; err = 0; #endif @@ -232,6 +334,14 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file, return -EFAULT; break; +#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL + case RTC_UIE_OFF: + clear_uie(rtc); + return 0; + + case RTC_UIE_ON: + return set_uie(rtc); +#endif default: err = -ENOTTY; break; @@ -244,6 +354,9 @@ static int rtc_dev_release(struct inode *inode, struct file *file) { struct rtc_device *rtc = to_rtc_device(file->private_data); +#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL + clear_uie(rtc); +#endif if (rtc->ops->release) rtc->ops->release(rtc->class_dev.dev); @@ -284,6 +397,10 @@ static int rtc_dev_add_device(struct class_device *class_dev, mutex_init(&rtc->char_lock); spin_lock_init(&rtc->irq_lock); init_waitqueue_head(&rtc->irq_queue); +#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL + INIT_WORK(&rtc->uie_task, rtc_uie_task, rtc); + setup_timer(&rtc->uie_timer, rtc_uie_timer, (unsigned long)rtc); +#endif cdev_init(&rtc->char_dev, &rtc_dev_fops); rtc->char_dev.owner = rtc->owner; diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c new file mode 100644 index 0000000..e8afb93 --- /dev/null +++ b/drivers/rtc/rtc-ds1307.c @@ -0,0 +1,388 @@ +/* + * rtc-ds1307.c - RTC driver for some mostly-compatible I2C chips. + * + * Copyright (C) 2005 James Chapman (ds1337 core) + * Copyright (C) 2006 David Brownell + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/string.h> +#include <linux/rtc.h> +#include <linux/bcd.h> + + + +/* We can't determine type by probing, but if we expect pre-Linux code + * to have set the chip up as a clock (turning on the oscillator and + * setting the date and time), Linux can ignore the non-clock features. + * That's a natural job for a factory or repair bench. + * + * If the I2C "force" mechanism is used, we assume the chip is a ds1337. + * (Much better would be board-specific tables of I2C devices, along with + * the platform_data drivers would use to sort such issues out.) + */ +enum ds_type { + unknown = 0, + ds_1307, /* or ds1338, ... */ + ds_1337, /* or ds1339, ... */ + ds_1340, /* or st m41t00, ... */ + // rs5c372 too? different address... +}; + +static unsigned short normal_i2c[] = { 0x68, I2C_CLIENT_END }; + +I2C_CLIENT_INSMOD; + + + +/* RTC registers don't differ much, except for the century flag */ +#define DS1307_REG_SECS 0x00 /* 00-59 */ +# define DS1307_BIT_CH 0x80 +#define DS1307_REG_MIN 0x01 /* 00-59 */ +#define DS1307_REG_HOUR 0x02 /* 00-23, or 1-12{am,pm} */ +# define DS1340_BIT_CENTURY_EN 0x80 /* in REG_HOUR */ +# define DS1340_BIT_CENTURY 0x40 /* in REG_HOUR */ +#define DS1307_REG_WDAY 0x03 /* 01-07 */ +#define DS1307_REG_MDAY 0x04 /* 01-31 */ +#define DS1307_REG_MONTH 0x05 /* 01-12 */ +# define DS1337_BIT_CENTURY 0x80 /* in REG_MONTH */ +#define DS1307_REG_YEAR 0x06 /* 00-99 */ + +/* Other registers (control, status, alarms, trickle charge, NVRAM, etc) + * start at 7, and they differ a lot. Only control and status matter for RTC; + * be careful using them. + */ +#define DS1307_REG_CONTROL 0x07 +# define DS1307_BIT_OUT 0x80 +# define DS1307_BIT_SQWE 0x10 +# define DS1307_BIT_RS1 0x02 +# define DS1307_BIT_RS0 0x01 +#define DS1337_REG_CONTROL 0x0e +# define DS1337_BIT_nEOSC 0x80 +# define DS1337_BIT_RS2 0x10 +# define DS1337_BIT_RS1 0x08 +# define DS1337_BIT_INTCN 0x04 +# define DS1337_BIT_A2IE 0x02 +# define DS1337_BIT_A1IE 0x01 +#define DS1337_REG_STATUS 0x0f +# define DS1337_BIT_OSF 0x80 +# define DS1337_BIT_A2I 0x02 +# define DS1337_BIT_A1I 0x01 +#define DS1339_REG_TRICKLE 0x10 + + + +struct ds1307 { + u8 reg_addr; + u8 regs[8]; + enum ds_type type; + struct i2c_msg msg[2]; + struct i2c_client client; + struct rtc_device *rtc; +}; + + +static int ds1307_get_time(struct device *dev, struct rtc_time *t) +{ + struct ds1307 *ds1307 = dev_get_drvdata(dev); + int tmp; + + /* read the RTC registers all at once */ + ds1307->msg[1].flags = I2C_M_RD; + ds1307->msg[1].len = 7; + + tmp = i2c_transfer(ds1307->client.adapter, ds1307->msg, 2); + if (tmp != 2) { + dev_err(dev, "%s error %d\n", "read", tmp); + return -EIO; + } + + dev_dbg(dev, "%s: %02x %02x %02x %02x %02x %02x %02x\n", + "read", + ds1307->regs[0], ds1307->regs[1], + ds1307->regs[2], ds1307->regs[3], + ds1307->regs[4], ds1307->regs[5], + ds1307->regs[6]); + + t->tm_sec = BCD2BIN(ds1307->regs[DS1307_REG_SECS] & 0x7f); + t->tm_min = BCD2BIN(ds1307->regs[DS1307_REG_MIN] & 0x7f); + tmp = ds1307->regs[DS1307_REG_HOUR] & 0x3f; + t->tm_hour = BCD2BIN(tmp); + t->tm_wday = BCD2BIN(ds1307->regs[DS1307_REG_WDAY] & 0x07) - 1; + t->tm_mday = BCD2BIN(ds1307->regs[DS1307_REG_MDAY] & 0x3f); + tmp = ds1307->regs[DS1307_REG_MONTH] & 0x1f; + t->tm_mon = BCD2BIN(tmp) - 1; + + /* assume 20YY not 19YY, and ignore DS1337_BIT_CENTURY */ + t->tm_year = BCD2BIN(ds1307->regs[DS1307_REG_YEAR]) + 100; + + dev_dbg(dev, "%s secs=%d, mins=%d, " + "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n", + "read", t->tm_sec, t->tm_min, + t->tm_hour, t->tm_mday, + t->tm_mon, t->tm_year, t->tm_wday); + + return 0; +} + +static int ds1307_set_time(struct device *dev, struct rtc_time *t) +{ + struct ds1307 *ds1307 = dev_get_drvdata(dev); + int result; + int tmp; + u8 *buf = ds1307->regs; + + dev_dbg(dev, "%s secs=%d, mins=%d, " + "hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n", + "write", dt->tm_sec, dt->tm_min, + dt->tm_hour, dt->tm_mday, + dt->tm_mon, dt->tm_year, dt->tm_wday); + + *buf++ = 0; /* first register addr */ + buf[DS1307_REG_SECS] = BIN2BCD(t->tm_sec); + buf[DS1307_REG_MIN] = BIN2BCD(t->tm_min); + buf[DS1307_REG_HOUR] = BIN2BCD(t->tm_hour); + buf[DS1307_REG_WDAY] = BIN2BCD(t->tm_wday + 1); + buf[DS1307_REG_MDAY] = BIN2BCD(t->tm_mday); + buf[DS1307_REG_MONTH] = BIN2BCD(t->tm_mon + 1); + + /* assume 20YY not 19YY */ + tmp = t->tm_year - 100; + buf[DS1307_REG_YEAR] = BIN2BCD(tmp); + + if (ds1307->type == ds_1337) + buf[DS1307_REG_MONTH] |= DS1337_BIT_CENTURY; + else if (ds1307->type == ds_1340) + buf[DS1307_REG_HOUR] |= DS1340_BIT_CENTURY_EN + | DS1340_BIT_CENTURY; + + ds1307->msg[1].flags = 0; + ds1307->msg[1].len = 8; + + dev_dbg(dev, "%s: %02x %02x %02x %02x %02x %02x %02x\n", + "write", buf[0], buf[1], buf[2], buf[3], + buf[4], buf[5], buf[6]); + + result = i2c_transfer(ds1307->client.adapter, &ds1307->msg[1], 1); + if (result != 1) { + dev_err(dev, "%s error %d\n", "write", tmp); + return -EIO; + } + return 0; +} + +static struct rtc_class_ops ds13xx_rtc_ops = { + .read_time = ds1307_get_time, + .set_time = ds1307_set_time, +}; + +static struct i2c_driver ds1307_driver; + +static int __devinit +ds1307_detect(struct i2c_adapter *adapter, int address, int kind) +{ + struct ds1307 *ds1307; + int err = -ENODEV; + struct i2c_client *client; + int tmp; + + if (!(ds1307 = kzalloc(sizeof(struct ds1307), GFP_KERNEL))) { + err = -ENOMEM; + goto exit; + } + + client = &ds1307->client; + client->addr = address; + client->adapter = adapter; + client->driver = &ds1307_driver; + client->flags = 0; + + i2c_set_clientdata(client, ds1307); + + ds1307->msg[0].addr = client->addr; + ds1307->msg[0].flags = 0; + ds1307->msg[0].len = 1; + ds1307->msg[0].buf = &ds1307->reg_addr; + + ds1307->msg[1].addr = client->addr; + ds1307->msg[1].flags = I2C_M_RD; + ds1307->msg[1].len = sizeof(ds1307->regs); + ds1307->msg[1].buf = ds1307->regs; + + /* HACK: "force" implies "needs ds1337-style-oscillator setup" */ + if (kind >= 0) { + ds1307->type = ds_1337; + + ds1307->reg_addr = DS1337_REG_CONTROL; + ds1307->msg[1].len = 2; + + tmp = i2c_transfer(client->adapter, ds1307->msg, 2); + if (tmp != 2) { + pr_debug("read error %d\n", tmp); + err = -EIO; + goto exit_free; + } + + ds1307->reg_addr = 0; + ds1307->msg[1].len = sizeof(ds1307->regs); + + /* oscillator is off; need to turn it on */ + if ((ds1307->regs[0] & DS1337_BIT_nEOSC) + || (ds1307->regs[1] & DS1337_BIT_OSF)) { + printk(KERN_ERR "no ds1337 oscillator code\n"); + goto exit_free; + } + } else + ds1307->type = ds_1307; + +read_rtc: + /* read RTC registers */ + + tmp = i2c_transfer(client->adapter, ds1307->msg, 2); + if (tmp != 2) { + pr_debug("read error %d\n", tmp); + err = -EIO; + goto exit_free; + } + + /* minimal sanity checking; some chips (like DS1340) don't + * specify the extra bits as must-be-zero, but there are + * still a few values that are clearly out-of-range. + */ + tmp = ds1307->regs[DS1307_REG_SECS]; + if (tmp & DS1307_BIT_CH) { + if (ds1307->type && ds1307->type != ds_1307) { + pr_debug("not a ds1307?\n"); + goto exit_free; + } + ds1307->type = ds_1307; + + /* this partial initialization should work for ds1307, + * ds1338, ds1340, st m41t00, and more. + */ + dev_warn(&client->dev, "oscillator started; SET TIME!\n"); + i2c_smbus_write_byte_data(client, 0, 0); + goto read_rtc; + } + tmp = BCD2BIN(tmp & 0x7f); + if (tmp > 60) + goto exit_free; + tmp = BCD2BIN(ds1307->regs[DS1307_REG_MIN] & 0x7f); + if (tmp > 60) + goto exit_free; + + tmp = BCD2BIN(ds1307->regs[DS1307_REG_MDAY] & 0x3f); + if (tmp == 0 || tmp > 31) + goto exit_free; + + tmp = BCD2BIN(ds1307->regs[DS1307_REG_MONTH] & 0x1f); + if (tmp == 0 || tmp > 12) + goto exit_free; + + /* force into in 24 hour mode (most chips) or + * disable century bit (ds1340) + */ + tmp = ds1307->regs[DS1307_REG_HOUR]; + if (tmp & (1 << 6)) { + if (tmp & (1 << 5)) + tmp = BCD2BIN(tmp & 0x1f) + 12; + else + tmp = BCD2BIN(tmp); + i2c_smbus_write_byte_data(client, + DS1307_REG_HOUR, + BIN2BCD(tmp)); + } + + /* FIXME chips like 1337 can generate alarm irqs too; those are + * worth exposing through the API (especially when the irq is + * wakeup-capable). + */ + + switch (ds1307->type) { + case unknown: + strlcpy(client->name, "unknown", I2C_NAME_SIZE); + break; + case ds_1307: + strlcpy(client->name, "ds1307", I2C_NAME_SIZE); + break; + case ds_1337: + strlcpy(client->name, "ds1337", I2C_NAME_SIZE); + break; + case ds_1340: + strlcpy(client->name, "ds1340", I2C_NAME_SIZE); + break; + } + + /* Tell the I2C layer a new client has arrived */ + if ((err = i2c_attach_client(client))) + goto exit_free; + + ds1307->rtc = rtc_device_register(client->name, &client->dev, + &ds13xx_rtc_ops, THIS_MODULE); + if (IS_ERR(ds1307->rtc)) { + err = PTR_ERR(ds1307->rtc); + dev_err(&client->dev, + "unable to register the class device\n"); + goto exit_detach; + } + + return 0; + +exit_detach: + i2c_detach_client(client); +exit_free: + kfree(ds1307); +exit: + return err; +} + +static int __devinit +ds1307_attach_adapter(struct i2c_adapter *adapter) +{ + if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) + return 0; + return i2c_probe(adapter, &addr_data, ds1307_detect); +} + +static int __devexit ds1307_detach_client(struct i2c_client *client) +{ + int err; + struct ds1307 *ds1307 = i2c_get_clientdata(client); + + rtc_device_unregister(ds1307->rtc); + if ((err = i2c_detach_client(client))) + return err; + kfree(ds1307); + return 0; +} + +static struct i2c_driver ds1307_driver = { + .driver = { + .name = "ds1307", + .owner = THIS_MODULE, + }, + .attach_adapter = ds1307_attach_adapter, + .detach_client = __devexit_p(ds1307_detach_client), +}; + +static int __init ds1307_init(void) +{ + return i2c_add_driver(&ds1307_driver); +} +module_init(ds1307_init); + +static void __exit ds1307_exit(void) +{ + i2c_del_driver(&ds1307_driver); +} +module_exit(ds1307_exit); + +MODULE_DESCRIPTION("RTC driver for DS1307 and similar chips"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-ds1553.c b/drivers/rtc/rtc-ds1553.c new file mode 100644 index 0000000..ecafbad --- /dev/null +++ b/drivers/rtc/rtc-ds1553.c @@ -0,0 +1,414 @@ +/* + * An rtc driver for the Dallas DS1553 + * + * Copyright (C) 2006 Atsushi Nemoto <anemo@mba.ocn.ne.jp> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/bcd.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/jiffies.h> +#include <linux/interrupt.h> +#include <linux/rtc.h> +#include <linux/platform_device.h> +#include <linux/io.h> + +#define DRV_VERSION "0.1" + +#define RTC_REG_SIZE 0x2000 +#define RTC_OFFSET 0x1ff0 + +#define RTC_FLAGS (RTC_OFFSET + 0) +#define RTC_SECONDS_ALARM (RTC_OFFSET + 2) +#define RTC_MINUTES_ALARM (RTC_OFFSET + 3) +#define RTC_HOURS_ALARM (RTC_OFFSET + 4) +#define RTC_DATE_ALARM (RTC_OFFSET + 5) +#define RTC_INTERRUPTS (RTC_OFFSET + 6) +#define RTC_WATCHDOG (RTC_OFFSET + 7) +#define RTC_CONTROL (RTC_OFFSET + 8) +#define RTC_CENTURY (RTC_OFFSET + 8) +#define RTC_SECONDS (RTC_OFFSET + 9) +#define RTC_MINUTES (RTC_OFFSET + 10) +#define RTC_HOURS (RTC_OFFSET + 11) +#define RTC_DAY (RTC_OFFSET + 12) +#define RTC_DATE (RTC_OFFSET + 13) +#define RTC_MONTH (RTC_OFFSET + 14) +#define RTC_YEAR (RTC_OFFSET + 15) + +#define RTC_CENTURY_MASK 0x3f +#define RTC_SECONDS_MASK 0x7f +#define RTC_DAY_MASK 0x07 + +/* Bits in the Control/Century register */ +#define RTC_WRITE 0x80 +#define RTC_READ 0x40 + +/* Bits in the Seconds register */ +#define RTC_STOP 0x80 + +/* Bits in the Flags register */ +#define RTC_FLAGS_AF 0x40 +#define RTC_FLAGS_BLF 0x10 + +/* Bits in the Interrupts register */ +#define RTC_INTS_AE 0x80 + +struct rtc_plat_data { + struct rtc_device *rtc; + void __iomem *ioaddr; + unsigned long baseaddr; + unsigned long last_jiffies; + int irq; + unsigned int irqen; + int alrm_sec; + int alrm_min; + int alrm_hour; + int alrm_mday; +}; + +static int ds1553_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + void __iomem *ioaddr = pdata->ioaddr; + u8 century; + + century = BIN2BCD((tm->tm_year + 1900) / 100); + + writeb(RTC_WRITE, pdata->ioaddr + RTC_CONTROL); + + writeb(BIN2BCD(tm->tm_year % 100), ioaddr + RTC_YEAR); + writeb(BIN2BCD(tm->tm_mon + 1), ioaddr + RTC_MONTH); + writeb(BIN2BCD(tm->tm_wday) & RTC_DAY_MASK, ioaddr + RTC_DAY); + writeb(BIN2BCD(tm->tm_mday), ioaddr + RTC_DATE); + writeb(BIN2BCD(tm->tm_hour), ioaddr + RTC_HOURS); + writeb(BIN2BCD(tm->tm_min), ioaddr + RTC_MINUTES); + writeb(BIN2BCD(tm->tm_sec) & RTC_SECONDS_MASK, ioaddr + RTC_SECONDS); + + /* RTC_CENTURY and RTC_CONTROL share same register */ + writeb(RTC_WRITE | (century & RTC_CENTURY_MASK), ioaddr + RTC_CENTURY); + writeb(century & RTC_CENTURY_MASK, ioaddr + RTC_CONTROL); + return 0; +} + +static int ds1553_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + void __iomem *ioaddr = pdata->ioaddr; + unsigned int year, month, day, hour, minute, second, week; + unsigned int century; + + /* give enough time to update RTC in case of continuous read */ + if (pdata->last_jiffies == jiffies) + msleep(1); + pdata->last_jiffies = jiffies; + writeb(RTC_READ, ioaddr + RTC_CONTROL); + second = readb(ioaddr + RTC_SECONDS) & RTC_SECONDS_MASK; + minute = readb(ioaddr + RTC_MINUTES); + hour = readb(ioaddr + RTC_HOURS); + day = readb(ioaddr + RTC_DATE); + week = readb(ioaddr + RTC_DAY) & RTC_DAY_MASK; + month = readb(ioaddr + RTC_MONTH); + year = readb(ioaddr + RTC_YEAR); + century = readb(ioaddr + RTC_CENTURY) & RTC_CENTURY_MASK; + writeb(0, ioaddr + RTC_CONTROL); + tm->tm_sec = BCD2BIN(second); + tm->tm_min = BCD2BIN(minute); + tm->tm_hour = BCD2BIN(hour); + tm->tm_mday = BCD2BIN(day); + tm->tm_wday = BCD2BIN(week); + tm->tm_mon = BCD2BIN(month) - 1; + /* year is 1900 + tm->tm_year */ + tm->tm_year = BCD2BIN(year) + BCD2BIN(century) * 100 - 1900; + + if (rtc_valid_tm(tm) < 0) { + dev_err(dev, "retrieved date/time is not valid.\n"); + rtc_time_to_tm(0, tm); + } + return 0; +} + +static void ds1553_rtc_update_alarm(struct rtc_plat_data *pdata) +{ + void __iomem *ioaddr = pdata->ioaddr; + unsigned long flags; + + spin_lock_irqsave(&pdata->rtc->irq_lock, flags); + writeb(pdata->alrm_mday < 0 || (pdata->irqen & RTC_UF) ? + 0x80 : BIN2BCD(pdata->alrm_mday), + ioaddr + RTC_DATE_ALARM); + writeb(pdata->alrm_hour < 0 || (pdata->irqen & RTC_UF) ? + 0x80 : BIN2BCD(pdata->alrm_hour), + ioaddr + RTC_HOURS_ALARM); + writeb(pdata->alrm_min < 0 || (pdata->irqen & RTC_UF) ? + 0x80 : BIN2BCD(pdata->alrm_min), + ioaddr + RTC_MINUTES_ALARM); + writeb(pdata->alrm_sec < 0 || (pdata->irqen & RTC_UF) ? + 0x80 : BIN2BCD(pdata->alrm_sec), + ioaddr + RTC_SECONDS_ALARM); + writeb(pdata->irqen ? RTC_INTS_AE : 0, ioaddr + RTC_INTERRUPTS); + readb(ioaddr + RTC_FLAGS); /* clear interrupts */ + spin_unlock_irqrestore(&pdata->rtc->irq_lock, flags); +} + +static int ds1553_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + + if (pdata->irq < 0) + return -EINVAL; + pdata->alrm_mday = alrm->time.tm_mday; + pdata->alrm_hour = alrm->time.tm_hour; + pdata->alrm_min = alrm->time.tm_min; + pdata->alrm_sec = alrm->time.tm_sec; + if (alrm->enabled) + pdata->irqen |= RTC_AF; + ds1553_rtc_update_alarm(pdata); + return 0; +} + +static int ds1553_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + + if (pdata->irq < 0) + return -EINVAL; + alrm->time.tm_mday = pdata->alrm_mday < 0 ? 0 : pdata->alrm_mday; + alrm->time.tm_hour = pdata->alrm_hour < 0 ? 0 : pdata->alrm_hour; + alrm->time.tm_min = pdata->alrm_min < 0 ? 0 : pdata->alrm_min; + alrm->time.tm_sec = pdata->alrm_sec < 0 ? 0 : pdata->alrm_sec; + alrm->enabled = (pdata->irqen & RTC_AF) ? 1 : 0; + return 0; +} + +static irqreturn_t ds1553_rtc_interrupt(int irq, void *dev_id, + struct pt_regs *regs) +{ + struct platform_device *pdev = dev_id; + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + void __iomem *ioaddr = pdata->ioaddr; + unsigned long events = RTC_IRQF; + + /* read and clear interrupt */ + if (!(readb(ioaddr + RTC_FLAGS) & RTC_FLAGS_AF)) + return IRQ_NONE; + if (readb(ioaddr + RTC_SECONDS_ALARM) & 0x80) + events |= RTC_UF; + else + events |= RTC_AF; + rtc_update_irq(&pdata->rtc->class_dev, 1, events); + return IRQ_HANDLED; +} + +static void ds1553_rtc_release(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + + if (pdata->irq >= 0) { + pdata->irqen = 0; + ds1553_rtc_update_alarm(pdata); + } +} + +static int ds1553_rtc_ioctl(struct device *dev, unsigned int cmd, + unsigned long arg) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + + if (pdata->irq < 0) + return -ENOIOCTLCMD; + switch (cmd) { + case RTC_AIE_OFF: + pdata->irqen &= ~RTC_AF; + ds1553_rtc_update_alarm(pdata); + break; + case RTC_AIE_ON: + pdata->irqen |= RTC_AF; + ds1553_rtc_update_alarm(pdata); + break; + case RTC_UIE_OFF: + pdata->irqen &= ~RTC_UF; + ds1553_rtc_update_alarm(pdata); + break; + case RTC_UIE_ON: + pdata->irqen |= RTC_UF; + ds1553_rtc_update_alarm(pdata); + break; + default: + return -ENOIOCTLCMD; + } + return 0; +} + +static struct rtc_class_ops ds1553_rtc_ops = { + .read_time = ds1553_rtc_read_time, + .set_time = ds1553_rtc_set_time, + .read_alarm = ds1553_rtc_read_alarm, + .set_alarm = ds1553_rtc_set_alarm, + .release = ds1553_rtc_release, + .ioctl = ds1553_rtc_ioctl, +}; + +static ssize_t ds1553_nvram_read(struct kobject *kobj, char *buf, + loff_t pos, size_t size) +{ + struct platform_device *pdev = + to_platform_device(container_of(kobj, struct device, kobj)); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + void __iomem *ioaddr = pdata->ioaddr; + ssize_t count; + + for (count = 0; size > 0 && pos < RTC_OFFSET; count++, size--) + *buf++ = readb(ioaddr + pos++); + return count; +} + +static ssize_t ds1553_nvram_write(struct kobject *kobj, char *buf, + loff_t pos, size_t size) +{ + struct platform_device *pdev = + to_platform_device(container_of(kobj, struct device, kobj)); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + void __iomem *ioaddr = pdata->ioaddr; + ssize_t count; + + for (count = 0; size > 0 && pos < RTC_OFFSET; count++, size--) + writeb(*buf++, ioaddr + pos++); + return count; +} + +static struct bin_attribute ds1553_nvram_attr = { + .attr = { + .name = "nvram", + .mode = S_IRUGO | S_IWUGO, + .owner = THIS_MODULE, + }, + .size = RTC_OFFSET, + .read = ds1553_nvram_read, + .write = ds1553_nvram_write, +}; + +static int __init ds1553_rtc_probe(struct platform_device *pdev) +{ + struct rtc_device *rtc; + struct resource *res; + unsigned int cen, sec; + struct rtc_plat_data *pdata = NULL; + void __iomem *ioaddr = NULL; + int ret = 0; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + pdata->irq = -1; + if (!request_mem_region(res->start, RTC_REG_SIZE, pdev->name)) { + ret = -EBUSY; + goto out; + } + pdata->baseaddr = res->start; + ioaddr = ioremap(pdata->baseaddr, RTC_REG_SIZE); + if (!ioaddr) { + ret = -ENOMEM; + goto out; + } + pdata->ioaddr = ioaddr; + pdata->irq = platform_get_irq(pdev, 0); + + /* turn RTC on if it was not on */ + sec = readb(ioaddr + RTC_SECONDS); + if (sec & RTC_STOP) { + sec &= RTC_SECONDS_MASK; + cen = readb(ioaddr + RTC_CENTURY) & RTC_CENTURY_MASK; + writeb(RTC_WRITE, ioaddr + RTC_CONTROL); + writeb(sec, ioaddr + RTC_SECONDS); + writeb(cen & RTC_CENTURY_MASK, ioaddr + RTC_CONTROL); + } + if (readb(ioaddr + RTC_FLAGS) & RTC_FLAGS_BLF) + dev_warn(&pdev->dev, "voltage-low detected.\n"); + + if (pdata->irq >= 0) { + writeb(0, ioaddr + RTC_INTERRUPTS); + if (request_irq(pdata->irq, ds1553_rtc_interrupt, SA_SHIRQ, + pdev->name, pdev) < 0) { + dev_warn(&pdev->dev, "interrupt not available.\n"); + pdata->irq = -1; + } + } + + rtc = rtc_device_register(pdev->name, &pdev->dev, + &ds1553_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) { + ret = PTR_ERR(rtc); + goto out; + } + pdata->rtc = rtc; + pdata->last_jiffies = jiffies; + platform_set_drvdata(pdev, pdata); + sysfs_create_bin_file(&pdev->dev.kobj, &ds1553_nvram_attr); + return 0; + out: + if (pdata->irq >= 0) + free_irq(pdata->irq, pdev); + if (ioaddr) + iounmap(ioaddr); + if (pdata->baseaddr) + release_mem_region(pdata->baseaddr, RTC_REG_SIZE); + kfree(pdata); + return ret; +} + +static int __devexit ds1553_rtc_remove(struct platform_device *pdev) +{ + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + + sysfs_remove_bin_file(&pdev->dev.kobj, &ds1553_nvram_attr); + rtc_device_unregister(pdata->rtc); + if (pdata->irq >= 0) { + writeb(0, pdata->ioaddr + RTC_INTERRUPTS); + free_irq(pdata->irq, pdev); + } + iounmap(pdata->ioaddr); + release_mem_region(pdata->baseaddr, RTC_REG_SIZE); + kfree(pdata); + return 0; +} + +static struct platform_driver ds1553_rtc_driver = { + .probe = ds1553_rtc_probe, + .remove = __devexit_p(ds1553_rtc_remove), + .driver = { + .name = "ds1553", + .owner = THIS_MODULE, + }, +}; + +static __init int ds1553_init(void) +{ + return platform_driver_register(&ds1553_rtc_driver); +} + +static __exit void ds1553_exit(void) +{ + return platform_driver_unregister(&ds1553_rtc_driver); +} + +module_init(ds1553_init); +module_exit(ds1553_exit); + +MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>"); +MODULE_DESCRIPTION("Dallas DS1553 RTC driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); diff --git a/drivers/rtc/rtc-ds1742.c b/drivers/rtc/rtc-ds1742.c new file mode 100644 index 0000000..8e47e5a --- /dev/null +++ b/drivers/rtc/rtc-ds1742.c @@ -0,0 +1,259 @@ +/* + * An rtc driver for the Dallas DS1742 + * + * Copyright (C) 2006 Atsushi Nemoto <anemo@mba.ocn.ne.jp> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/bcd.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/jiffies.h> +#include <linux/rtc.h> +#include <linux/platform_device.h> +#include <linux/io.h> + +#define DRV_VERSION "0.1" + +#define RTC_REG_SIZE 0x800 +#define RTC_OFFSET 0x7f8 + +#define RTC_CONTROL (RTC_OFFSET + 0) +#define RTC_CENTURY (RTC_OFFSET + 0) +#define RTC_SECONDS (RTC_OFFSET + 1) +#define RTC_MINUTES (RTC_OFFSET + 2) +#define RTC_HOURS (RTC_OFFSET + 3) +#define RTC_DAY (RTC_OFFSET + 4) +#define RTC_DATE (RTC_OFFSET + 5) +#define RTC_MONTH (RTC_OFFSET + 6) +#define RTC_YEAR (RTC_OFFSET + 7) + +#define RTC_CENTURY_MASK 0x3f +#define RTC_SECONDS_MASK 0x7f +#define RTC_DAY_MASK 0x07 + +/* Bits in the Control/Century register */ +#define RTC_WRITE 0x80 +#define RTC_READ 0x40 + +/* Bits in the Seconds register */ +#define RTC_STOP 0x80 + +/* Bits in the Day register */ +#define RTC_BATT_FLAG 0x80 + +struct rtc_plat_data { + struct rtc_device *rtc; + void __iomem *ioaddr; + unsigned long baseaddr; + unsigned long last_jiffies; +}; + +static int ds1742_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + void __iomem *ioaddr = pdata->ioaddr; + u8 century; + + century = BIN2BCD((tm->tm_year + 1900) / 100); + + writeb(RTC_WRITE, ioaddr + RTC_CONTROL); + + writeb(BIN2BCD(tm->tm_year % 100), ioaddr + RTC_YEAR); + writeb(BIN2BCD(tm->tm_mon + 1), ioaddr + RTC_MONTH); + writeb(BIN2BCD(tm->tm_wday) & RTC_DAY_MASK, ioaddr + RTC_DAY); + writeb(BIN2BCD(tm->tm_mday), ioaddr + RTC_DATE); + writeb(BIN2BCD(tm->tm_hour), ioaddr + RTC_HOURS); + writeb(BIN2BCD(tm->tm_min), ioaddr + RTC_MINUTES); + writeb(BIN2BCD(tm->tm_sec) & RTC_SECONDS_MASK, ioaddr + RTC_SECONDS); + + /* RTC_CENTURY and RTC_CONTROL share same register */ + writeb(RTC_WRITE | (century & RTC_CENTURY_MASK), ioaddr + RTC_CENTURY); + writeb(century & RTC_CENTURY_MASK, ioaddr + RTC_CONTROL); + return 0; +} + +static int ds1742_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + void __iomem *ioaddr = pdata->ioaddr; + unsigned int year, month, day, hour, minute, second, week; + unsigned int century; + + /* give enough time to update RTC in case of continuous read */ + if (pdata->last_jiffies == jiffies) + msleep(1); + pdata->last_jiffies = jiffies; + writeb(RTC_READ, ioaddr + RTC_CONTROL); + second = readb(ioaddr + RTC_SECONDS) & RTC_SECONDS_MASK; + minute = readb(ioaddr + RTC_MINUTES); + hour = readb(ioaddr + RTC_HOURS); + day = readb(ioaddr + RTC_DATE); + week = readb(ioaddr + RTC_DAY) & RTC_DAY_MASK; + month = readb(ioaddr + RTC_MONTH); + year = readb(ioaddr + RTC_YEAR); + century = readb(ioaddr + RTC_CENTURY) & RTC_CENTURY_MASK; + writeb(0, ioaddr + RTC_CONTROL); + tm->tm_sec = BCD2BIN(second); + tm->tm_min = BCD2BIN(minute); + tm->tm_hour = BCD2BIN(hour); + tm->tm_mday = BCD2BIN(day); + tm->tm_wday = BCD2BIN(week); + tm->tm_mon = BCD2BIN(month) - 1; + /* year is 1900 + tm->tm_year */ + tm->tm_year = BCD2BIN(year) + BCD2BIN(century) * 100 - 1900; + + if (rtc_valid_tm(tm) < 0) { + dev_err(dev, "retrieved date/time is not valid.\n"); + rtc_time_to_tm(0, tm); + } + return 0; +} + +static struct rtc_class_ops ds1742_rtc_ops = { + .read_time = ds1742_rtc_read_time, + .set_time = ds1742_rtc_set_time, +}; + +static ssize_t ds1742_nvram_read(struct kobject *kobj, char *buf, + loff_t pos, size_t size) +{ + struct platform_device *pdev = + to_platform_device(container_of(kobj, struct device, kobj)); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + void __iomem *ioaddr = pdata->ioaddr; + ssize_t count; + + for (count = 0; size > 0 && pos < RTC_OFFSET; count++, size--) + *buf++ = readb(ioaddr + pos++); + return count; +} + +static ssize_t ds1742_nvram_write(struct kobject *kobj, char *buf, + loff_t pos, size_t size) +{ + struct platform_device *pdev = + to_platform_device(container_of(kobj, struct device, kobj)); + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + void __iomem *ioaddr = pdata->ioaddr; + ssize_t count; + + for (count = 0; size > 0 && pos < RTC_OFFSET; count++, size--) + writeb(*buf++, ioaddr + pos++); + return count; +} + +static struct bin_attribute ds1742_nvram_attr = { + .attr = { + .name = "nvram", + .mode = S_IRUGO | S_IWUGO, + .owner = THIS_MODULE, + }, + .size = RTC_OFFSET, + .read = ds1742_nvram_read, + .write = ds1742_nvram_write, +}; + +static int __init ds1742_rtc_probe(struct platform_device *pdev) +{ + struct rtc_device *rtc; + struct resource *res; + unsigned int cen, sec; + struct rtc_plat_data *pdata = NULL; + void __iomem *ioaddr = NULL; + int ret = 0; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + if (!request_mem_region(res->start, RTC_REG_SIZE, pdev->name)) { + ret = -EBUSY; + goto out; + } + pdata->baseaddr = res->start; + ioaddr = ioremap(pdata->baseaddr, RTC_REG_SIZE); + if (!ioaddr) { + ret = -ENOMEM; + goto out; + } + pdata->ioaddr = ioaddr; + + /* turn RTC on if it was not on */ + sec = readb(ioaddr + RTC_SECONDS); + if (sec & RTC_STOP) { + sec &= RTC_SECONDS_MASK; + cen = readb(ioaddr + RTC_CENTURY) & RTC_CENTURY_MASK; + writeb(RTC_WRITE, ioaddr + RTC_CONTROL); + writeb(sec, ioaddr + RTC_SECONDS); + writeb(cen & RTC_CENTURY_MASK, ioaddr + RTC_CONTROL); + } + if (readb(ioaddr + RTC_DAY) & RTC_BATT_FLAG) + dev_warn(&pdev->dev, "voltage-low detected.\n"); + + rtc = rtc_device_register(pdev->name, &pdev->dev, + &ds1742_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) { + ret = PTR_ERR(rtc); + goto out; + } + pdata->rtc = rtc; + pdata->last_jiffies = jiffies; + platform_set_drvdata(pdev, pdata); + sysfs_create_bin_file(&pdev->dev.kobj, &ds1742_nvram_attr); + return 0; + out: + if (ioaddr) + iounmap(ioaddr); + if (pdata->baseaddr) + release_mem_region(pdata->baseaddr, RTC_REG_SIZE); + kfree(pdata); + return ret; +} + +static int __devexit ds1742_rtc_remove(struct platform_device *pdev) +{ + struct rtc_plat_data *pdata = platform_get_drvdata(pdev); + + sysfs_remove_bin_file(&pdev->dev.kobj, &ds1742_nvram_attr); + rtc_device_unregister(pdata->rtc); + iounmap(pdata->ioaddr); + release_mem_region(pdata->baseaddr, RTC_REG_SIZE); + kfree(pdata); + return 0; +} + +static struct platform_driver ds1742_rtc_driver = { + .probe = ds1742_rtc_probe, + .remove = __devexit_p(ds1742_rtc_remove), + .driver = { + .name = "ds1742", + .owner = THIS_MODULE, + }, +}; + +static __init int ds1742_init(void) +{ + return platform_driver_register(&ds1742_rtc_driver); +} + +static __exit void ds1742_exit(void) +{ + return platform_driver_unregister(&ds1742_rtc_driver); +} + +module_init(ds1742_init); +module_exit(ds1742_exit); + +MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>"); +MODULE_DESCRIPTION("Dallas DS1742 RTC driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); diff --git a/drivers/rtc/rtc-lib.c b/drivers/rtc/rtc-lib.c index cfedc1d..9812120 100644 --- a/drivers/rtc/rtc-lib.c +++ b/drivers/rtc/rtc-lib.c @@ -18,9 +18,19 @@ static const unsigned char rtc_days_in_month[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; +static const unsigned short rtc_ydays[2][13] = { + /* Normal years */ + { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, + /* Leap years */ + { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } +}; + #define LEAPS_THRU_END_OF(y) ((y)/4 - (y)/100 + (y)/400) #define LEAP_YEAR(year) ((!(year % 4) && (year % 100)) || !(year % 400)) +/* + * The number of days in the month. + */ int rtc_month_days(unsigned int month, unsigned int year) { return rtc_days_in_month[month] + (LEAP_YEAR(year) && month == 1); @@ -28,6 +38,15 @@ int rtc_month_days(unsigned int month, unsigned int year) EXPORT_SYMBOL(rtc_month_days); /* + * The number of days since January 1. (0 to 365) + */ +int rtc_year_days(unsigned int day, unsigned int month, unsigned int year) +{ + return rtc_ydays[LEAP_YEAR(year)][month] + day-1; +} +EXPORT_SYMBOL(rtc_year_days); + +/* * Convert seconds since 01-01-1970 00:00:00 to Gregorian date. */ void rtc_time_to_tm(unsigned long time, struct rtc_time *tm) diff --git a/drivers/rtc/rtc-max6902.c b/drivers/rtc/rtc-max6902.c new file mode 100644 index 0000000..2c97395 --- /dev/null +++ b/drivers/rtc/rtc-max6902.c @@ -0,0 +1,286 @@ +/* drivers/char/max6902.c + * + * Copyright (C) 2006 8D Technologies inc. + * Copyright (C) 2004 Compulab Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Driver for MAX6902 spi RTC + * + * Changelog: + * + * 24-May-2006: Raphael Assenat <raph@8d.com> + * - Major rework + * Converted to rtc_device and uses the SPI layer. + * + * ??-???-2005: Someone at Compulab + * - Initial driver creation. + */ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/version.h> + +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/init.h> +#include <linux/rtc.h> +#include <linux/spi/spi.h> +#include <linux/bcd.h> +#include <linux/delay.h> + +#define MAX6902_REG_SECONDS 0x01 +#define MAX6902_REG_MINUTES 0x03 +#define MAX6902_REG_HOURS 0x05 +#define MAX6902_REG_DATE 0x07 +#define MAX6902_REG_MONTH 0x09 +#define MAX6902_REG_DAY 0x0B +#define MAX6902_REG_YEAR 0x0D +#define MAX6902_REG_CONTROL 0x0F +#define MAX6902_REG_CENTURY 0x13 + +#undef MAX6902_DEBUG + +struct max6902 { + struct rtc_device *rtc; + u8 buf[9]; /* Burst read cmd + 8 registers */ + u8 tx_buf[2]; + u8 rx_buf[2]; +}; + +static void max6902_set_reg(struct device *dev, unsigned char address, + unsigned char data) +{ + struct spi_device *spi = to_spi_device(dev); + unsigned char buf[2]; + + /* MSB must be '0' to write */ + buf[0] = address & 0x7f; + buf[1] = data; + + spi_write(spi, buf, 2); +} + +static int max6902_get_reg(struct device *dev, unsigned char address, + unsigned char *data) +{ + struct spi_device *spi = to_spi_device(dev); + struct max6902 *chip = dev_get_drvdata(dev); + struct spi_message message; + struct spi_transfer xfer; + int status; + + if (!data) + return -EINVAL; + + /* Build our spi message */ + spi_message_init(&message); + memset(&xfer, 0, sizeof(xfer)); + xfer.len = 2; + /* Can tx_buf and rx_buf be equal? The doc in spi.h is not sure... */ + xfer.tx_buf = chip->tx_buf; + xfer.rx_buf = chip->rx_buf; + + /* Set MSB to indicate read */ + chip->tx_buf[0] = address | 0x80; + + spi_message_add_tail(&xfer, &message); + + /* do the i/o */ + status = spi_sync(spi, &message); + if (status == 0) + status = message.status; + else + return status; + + *data = chip->rx_buf[1]; + + return status; +} + +static int max6902_get_datetime(struct device *dev, struct rtc_time *dt) +{ + unsigned char tmp; + int century; + int err; + struct spi_device *spi = to_spi_device(dev); + struct max6902 *chip = dev_get_drvdata(dev); + struct spi_message message; + struct spi_transfer xfer; + int status; + + err = max6902_get_reg(dev, MAX6902_REG_CENTURY, &tmp); + if (err) + return err; + + /* build the message */ + spi_message_init(&message); + memset(&xfer, 0, sizeof(xfer)); + xfer.len = 1 + 7; /* Burst read command + 7 registers */ + xfer.tx_buf = chip->buf; + xfer.rx_buf = chip->buf; + chip->buf[0] = 0xbf; /* Burst read */ + spi_message_add_tail(&xfer, &message); + + /* do the i/o */ + status = spi_sync(spi, &message); + if (status == 0) + status = message.status; + else + return status; + + /* The chip sends data in this order: + * Seconds, Minutes, Hours, Date, Month, Day, Year */ + dt->tm_sec = BCD2BIN(chip->buf[1]); + dt->tm_min = BCD2BIN(chip->buf[2]); + dt->tm_hour = BCD2BIN(chip->buf[3]); + dt->tm_mday = BCD2BIN(chip->buf[4]); + dt->tm_mon = BCD2BIN(chip->buf[5] - 1); + dt->tm_wday = BCD2BIN(chip->buf[6]); + dt->tm_year = BCD2BIN(chip->buf[7]); + + century = BCD2BIN(tmp) * 100; + + dt->tm_year += century; + dt->tm_year -= 1900; + +#ifdef MAX6902_DEBUG + printk("\n%s : Read RTC values\n",__FUNCTION__); + printk("tm_hour: %i\n",dt->tm_hour); + printk("tm_min : %i\n",dt->tm_min); + printk("tm_sec : %i\n",dt->tm_sec); + printk("tm_year: %i\n",dt->tm_year); + printk("tm_mon : %i\n",dt->tm_mon); + printk("tm_mday: %i\n",dt->tm_mday); + printk("tm_wday: %i\n",dt->tm_wday); +#endif + + return 0; +} + +static int max6902_set_datetime(struct device *dev, struct rtc_time *dt) +{ + dt->tm_year = dt->tm_year+1900; + +#ifdef MAX6902_DEBUG + printk("\n%s : Setting RTC values\n",__FUNCTION__); + printk("tm_sec : %i\n",dt->tm_sec); + printk("tm_min : %i\n",dt->tm_min); + printk("tm_hour: %i\n",dt->tm_hour); + printk("tm_mday: %i\n",dt->tm_mday); + printk("tm_wday: %i\n",dt->tm_wday); + printk("tm_year: %i\n",dt->tm_year); +#endif + + /* Remove write protection */ + max6902_set_reg(dev, 0xF, 0); + + max6902_set_reg(dev, 0x01, BIN2BCD(dt->tm_sec)); + max6902_set_reg(dev, 0x03, BIN2BCD(dt->tm_min)); + max6902_set_reg(dev, 0x05, BIN2BCD(dt->tm_hour)); + + max6902_set_reg(dev, 0x07, BIN2BCD(dt->tm_mday)); + max6902_set_reg(dev, 0x09, BIN2BCD(dt->tm_mon+1)); + max6902_set_reg(dev, 0x0B, BIN2BCD(dt->tm_wday)); + max6902_set_reg(dev, 0x0D, BIN2BCD(dt->tm_year%100)); + max6902_set_reg(dev, 0x13, BIN2BCD(dt->tm_year/100)); + + /* Compulab used a delay here. However, the datasheet + * does not mention a delay being required anywhere... */ + /* delay(2000); */ + + /* Write protect */ + max6902_set_reg(dev, 0xF, 0x80); + + return 0; +} + +static int max6902_read_time(struct device *dev, struct rtc_time *tm) +{ + return max6902_get_datetime(dev, tm); +} + +static int max6902_set_time(struct device *dev, struct rtc_time *tm) +{ + return max6902_set_datetime(dev, tm); +} + +static struct rtc_class_ops max6902_rtc_ops = { + .read_time = max6902_read_time, + .set_time = max6902_set_time, +}; + +static int __devinit max6902_probe(struct spi_device *spi) +{ + struct rtc_device *rtc; + unsigned char tmp; + struct max6902 *chip; + int res; + + rtc = rtc_device_register("max6902", + &spi->dev, &max6902_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) + return PTR_ERR(rtc); + + spi->mode = SPI_MODE_3; + spi->bits_per_word = 8; + spi_setup(spi); + + chip = kzalloc(sizeof *chip, GFP_KERNEL); + if (!chip) { + rtc_device_unregister(rtc); + return -ENOMEM; + } + chip->rtc = rtc; + dev_set_drvdata(&spi->dev, chip); + + res = max6902_get_reg(&spi->dev, MAX6902_REG_SECONDS, &tmp); + if (res) { + rtc_device_unregister(rtc); + return res; + } + + return 0; +} + +static int __devexit max6902_remove(struct spi_device *spi) +{ + struct max6902 *chip = platform_get_drvdata(spi); + struct rtc_device *rtc = chip->rtc; + + if (rtc) + rtc_device_unregister(rtc); + + kfree(chip); + + return 0; +} + +static struct spi_driver max6902_driver = { + .driver = { + .name = "max6902", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + }, + .probe = max6902_probe, + .remove = __devexit_p(max6902_remove), +}; + +static __init int max6902_init(void) +{ + printk("max6902 spi driver\n"); + return spi_register_driver(&max6902_driver); +} +module_init(max6902_init); + +static __exit void max6902_exit(void) +{ + spi_unregister_driver(&max6902_driver); +} +module_exit(max6902_exit); + +MODULE_DESCRIPTION ("max6902 spi RTC driver"); +MODULE_AUTHOR ("Raphael Assenat"); +MODULE_LICENSE ("GPL"); diff --git a/drivers/rtc/rtc-pcf8583.c b/drivers/rtc/rtc-pcf8583.c new file mode 100644 index 0000000..b235a30 --- /dev/null +++ b/drivers/rtc/rtc-pcf8583.c @@ -0,0 +1,394 @@ +/* + * drivers/rtc/rtc-pcf8583.c + * + * Copyright (C) 2000 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Driver for PCF8583 RTC & RAM chip + * + * Converted to the generic RTC susbsystem by G. Liakhovetski (2006) + */ +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/mc146818rtc.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/bcd.h> + +struct rtc_mem { + unsigned int loc; + unsigned int nr; + unsigned char *data; +}; + +struct pcf8583 { + struct i2c_client client; + struct rtc_device *rtc; + unsigned char ctrl; +}; + +#define CTRL_STOP 0x80 +#define CTRL_HOLD 0x40 +#define CTRL_32KHZ 0x00 +#define CTRL_MASK 0x08 +#define CTRL_ALARMEN 0x04 +#define CTRL_ALARM 0x02 +#define CTRL_TIMER 0x01 + +static unsigned short normal_i2c[] = { I2C_CLIENT_END }; + +/* Module parameters */ +I2C_CLIENT_INSMOD; + +static struct i2c_driver pcf8583_driver; + +#define get_ctrl(x) ((struct pcf8583 *)i2c_get_clientdata(x))->ctrl +#define set_ctrl(x, v) get_ctrl(x) = v + +#define CMOS_YEAR (64 + 128) +#define CMOS_CHECKSUM (63) + +static int pcf8583_get_datetime(struct i2c_client *client, struct rtc_time *dt) +{ + unsigned char buf[8], addr[1] = { 1 }; + struct i2c_msg msgs[2] = { + { + .addr = client->addr, + .flags = 0, + .len = 1, + .buf = addr, + }, { + .addr = client->addr, + .flags = I2C_M_RD, + .len = 6, + .buf = buf, + } + }; + int ret; + + memset(buf, 0, sizeof(buf)); + + ret = i2c_transfer(client->adapter, msgs, 2); + if (ret == 2) { + dt->tm_year = buf[4] >> 6; + dt->tm_wday = buf[5] >> 5; + + buf[4] &= 0x3f; + buf[5] &= 0x1f; + + dt->tm_sec = BCD_TO_BIN(buf[1]); + dt->tm_min = BCD_TO_BIN(buf[2]); + dt->tm_hour = BCD_TO_BIN(buf[3]); + dt->tm_mday = BCD_TO_BIN(buf[4]); + dt->tm_mon = BCD_TO_BIN(buf[5]); + } + + return ret == 2 ? 0 : -EIO; +} + +static int pcf8583_set_datetime(struct i2c_client *client, struct rtc_time *dt, int datetoo) +{ + unsigned char buf[8]; + int ret, len = 6; + + buf[0] = 0; + buf[1] = get_ctrl(client) | 0x80; + buf[2] = 0; + buf[3] = BIN_TO_BCD(dt->tm_sec); + buf[4] = BIN_TO_BCD(dt->tm_min); + buf[5] = BIN_TO_BCD(dt->tm_hour); + + if (datetoo) { + len = 8; + buf[6] = BIN_TO_BCD(dt->tm_mday) | (dt->tm_year << 6); + buf[7] = BIN_TO_BCD(dt->tm_mon) | (dt->tm_wday << 5); + } + + ret = i2c_master_send(client, (char *)buf, len); + if (ret != len) + return -EIO; + + buf[1] = get_ctrl(client); + ret = i2c_master_send(client, (char *)buf, 2); + + return ret == 2 ? 0 : -EIO; +} + +static int pcf8583_get_ctrl(struct i2c_client *client, unsigned char *ctrl) +{ + *ctrl = get_ctrl(client); + return 0; +} + +static int pcf8583_set_ctrl(struct i2c_client *client, unsigned char *ctrl) +{ + unsigned char buf[2]; + + buf[0] = 0; + buf[1] = *ctrl; + set_ctrl(client, *ctrl); + + return i2c_master_send(client, (char *)buf, 2); +} + +static int pcf8583_read_mem(struct i2c_client *client, struct rtc_mem *mem) +{ + unsigned char addr[1]; + struct i2c_msg msgs[2] = { + { + .addr = client->addr, + .flags = 0, + .len = 1, + .buf = addr, + }, { + .addr = client->addr, + .flags = I2C_M_RD, + .len = mem->nr, + .buf = mem->data, + } + }; + + if (mem->loc < 8) + return -EINVAL; + + addr[0] = mem->loc; + + return i2c_transfer(client->adapter, msgs, 2) == 2 ? 0 : -EIO; +} + +static int pcf8583_write_mem(struct i2c_client *client, struct rtc_mem *mem) +{ + unsigned char addr[1]; + struct i2c_msg msgs[2] = { + { + .addr = client->addr, + .flags = 0, + .len = 1, + .buf = addr, + }, { + .addr = client->addr, + .flags = I2C_M_NOSTART, + .len = mem->nr, + .buf = mem->data, + } + }; + + if (mem->loc < 8) + return -EINVAL; + + addr[0] = mem->loc; + + return i2c_transfer(client->adapter, msgs, 2) == 2 ? 0 : -EIO; +} + +static int pcf8583_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct i2c_client *client = to_i2c_client(dev); + unsigned char ctrl, year[2]; + struct rtc_mem mem = { CMOS_YEAR, sizeof(year), year }; + int real_year, year_offset, err; + + /* + * Ensure that the RTC is running. + */ + pcf8583_get_ctrl(client, &ctrl); + if (ctrl & (CTRL_STOP | CTRL_HOLD)) { + unsigned char new_ctrl = ctrl & ~(CTRL_STOP | CTRL_HOLD); + + printk(KERN_WARNING "RTC: resetting control %02x -> %02x\n", + ctrl, new_ctrl); + + if ((err = pcf8583_set_ctrl(client, &new_ctrl)) < 0) + return err; + } + + if (pcf8583_get_datetime(client, tm) || + pcf8583_read_mem(client, &mem)) + return -EIO; + + real_year = year[0]; + + /* + * The RTC year holds the LSB two bits of the current + * year, which should reflect the LSB two bits of the + * CMOS copy of the year. Any difference indicates + * that we have to correct the CMOS version. + */ + year_offset = tm->tm_year - (real_year & 3); + if (year_offset < 0) + /* + * RTC year wrapped. Adjust it appropriately. + */ + year_offset += 4; + + tm->tm_year = real_year + year_offset + year[1] * 100; + + return 0; +} + +static int pcf8583_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct i2c_client *client = to_i2c_client(dev); + unsigned char year[2], chk; + struct rtc_mem cmos_year = { CMOS_YEAR, sizeof(year), year }; + struct rtc_mem cmos_check = { CMOS_CHECKSUM, 1, &chk }; + int ret; + + /* + * The RTC's own 2-bit year must reflect the least + * significant two bits of the CMOS year. + */ + + ret = pcf8583_set_datetime(client, tm, 1); + if (ret) + return ret; + + ret = pcf8583_read_mem(client, &cmos_check); + if (ret) + return ret; + + ret = pcf8583_read_mem(client, &cmos_year); + if (ret) + return ret; + + chk -= year[1] + year[0]; + + year[1] = tm->tm_year / 100; + year[0] = tm->tm_year % 100; + + chk += year[1] + year[0]; + + ret = pcf8583_write_mem(client, &cmos_year); + + if (ret) + return ret; + + ret = pcf8583_write_mem(client, &cmos_check); + + return ret; +} + +static struct rtc_class_ops pcf8583_rtc_ops = { + .read_time = pcf8583_rtc_read_time, + .set_time = pcf8583_rtc_set_time, +}; + +static int pcf8583_probe(struct i2c_adapter *adap, int addr, int kind); + +static int pcf8583_attach(struct i2c_adapter *adap) +{ + return i2c_probe(adap, &addr_data, pcf8583_probe); +} + +static int pcf8583_detach(struct i2c_client *client) +{ + int err; + struct pcf8583 *pcf = i2c_get_clientdata(client); + struct rtc_device *rtc = pcf->rtc; + + if (rtc) + rtc_device_unregister(rtc); + + if ((err = i2c_detach_client(client))) + return err; + + kfree(pcf); + return 0; +} + +static struct i2c_driver pcf8583_driver = { + .driver = { + .name = "pcf8583", + }, + .id = I2C_DRIVERID_PCF8583, + .attach_adapter = pcf8583_attach, + .detach_client = pcf8583_detach, +}; + +static int pcf8583_probe(struct i2c_adapter *adap, int addr, int kind) +{ + struct pcf8583 *pcf; + struct i2c_client *client; + struct rtc_device *rtc; + unsigned char buf[1], ad[1] = { 0 }; + int err; + struct i2c_msg msgs[2] = { + { + .addr = addr, + .flags = 0, + .len = 1, + .buf = ad, + }, { + .addr = addr, + .flags = I2C_M_RD, + .len = 1, + .buf = buf, + } + }; + + pcf = kzalloc(sizeof(*pcf), GFP_KERNEL); + if (!pcf) + return -ENOMEM; + + client = &pcf->client; + + client->addr = addr; + client->adapter = adap; + client->driver = &pcf8583_driver; + + strlcpy(client->name, pcf8583_driver.driver.name, I2C_NAME_SIZE); + + if (i2c_transfer(client->adapter, msgs, 2) != 2) { + err = -EIO; + goto exit_kfree; + } + + err = i2c_attach_client(client); + + if (err) + goto exit_kfree; + + rtc = rtc_device_register(pcf8583_driver.driver.name, &client->dev, + &pcf8583_rtc_ops, THIS_MODULE); + + if (IS_ERR(rtc)) { + err = PTR_ERR(rtc); + goto exit_detach; + } + + pcf->rtc = rtc; + i2c_set_clientdata(client, pcf); + set_ctrl(client, buf[0]); + + return 0; + +exit_detach: + i2c_detach_client(client); + +exit_kfree: + kfree(pcf); + + return err; +} + +static __init int pcf8583_init(void) +{ + return i2c_add_driver(&pcf8583_driver); +} + +static __exit void pcf8583_exit(void) +{ + i2c_del_driver(&pcf8583_driver); +} + +module_init(pcf8583_init); +module_exit(pcf8583_exit); + +MODULE_AUTHOR("Russell King"); +MODULE_DESCRIPTION("PCF8583 I2C RTC driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c new file mode 100644 index 0000000..ee53863 --- /dev/null +++ b/drivers/rtc/rtc-pl031.c @@ -0,0 +1,233 @@ +/* + * drivers/rtc/rtc-pl031.c + * + * Real Time Clock interface for ARM AMBA PrimeCell 031 RTC + * + * Author: Deepak Saxena <dsaxena@plexity.net> + * + * Copyright 2006 (c) MontaVista Software, Inc. + * + * 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. + */ + +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/rtc.h> +#include <linux/init.h> +#include <linux/fs.h> +#include <linux/interrupt.h> +#include <linux/string.h> +#include <linux/pm.h> + +#include <linux/amba/bus.h> + +#include <asm/io.h> +#include <asm/bitops.h> +#include <asm/hardware.h> +#include <asm/irq.h> +#include <asm/rtc.h> + +/* + * Register definitions + */ +#define RTC_DR 0x00 /* Data read register */ +#define RTC_MR 0x04 /* Match register */ +#define RTC_LR 0x08 /* Data load register */ +#define RTC_CR 0x0c /* Control register */ +#define RTC_IMSC 0x10 /* Interrupt mask and set register */ +#define RTC_RIS 0x14 /* Raw interrupt status register */ +#define RTC_MIS 0x18 /* Masked interrupt status register */ +#define RTC_ICR 0x1c /* Interrupt clear register */ + +struct pl031_local { + struct rtc_device *rtc; + void __iomem *base; +}; + +static irqreturn_t pl031_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct rtc_device *rtc = dev_id; + + rtc_update_irq(&rtc->class_dev, 1, RTC_AF); + + return IRQ_HANDLED; +} + +static int pl031_open(struct device *dev) +{ + /* + * We request IRQ in pl031_probe, so nothing to do here... + */ + return 0; +} + +static void pl031_release(struct device *dev) +{ +} + +static int pl031_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +{ + struct pl031_local *ldata = dev_get_drvdata(dev); + + switch (cmd) { + case RTC_AIE_OFF: + __raw_writel(1, ldata->base + RTC_MIS); + return 0; + case RTC_AIE_ON: + __raw_writel(0, ldata->base + RTC_MIS); + return 0; + } + + return -ENOIOCTLCMD; +} + +static int pl031_read_time(struct device *dev, struct rtc_time *tm) +{ + struct pl031_local *ldata = dev_get_drvdata(dev); + + rtc_time_to_tm(__raw_readl(ldata->base + RTC_DR), tm); + + return 0; +} + +static int pl031_set_time(struct device *dev, struct rtc_time *tm) +{ + unsigned long time; + struct pl031_local *ldata = dev_get_drvdata(dev); + + rtc_tm_to_time(tm, &time); + __raw_writel(time, ldata->base + RTC_LR); + + return 0; +} + +static int pl031_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + struct pl031_local *ldata = dev_get_drvdata(dev); + + rtc_time_to_tm(__raw_readl(ldata->base + RTC_MR), &alarm->time); + alarm->pending = __raw_readl(ldata->base + RTC_RIS); + alarm->enabled = __raw_readl(ldata->base + RTC_IMSC); + + return 0; +} + +static int pl031_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + struct pl031_local *ldata = dev_get_drvdata(dev); + unsigned long time; + + rtc_tm_to_time(&alarm->time, &time); + + __raw_writel(time, ldata->base + RTC_MR); + __raw_writel(!alarm->enabled, ldata->base + RTC_MIS); + + return 0; +} + +static struct rtc_class_ops pl031_ops = { + .open = pl031_open, + .release = pl031_release, + .ioctl = pl031_ioctl, + .read_time = pl031_read_time, + .set_time = pl031_set_time, + .read_alarm = pl031_read_alarm, + .set_alarm = pl031_set_alarm, +}; + +static int pl031_remove(struct amba_device *adev) +{ + struct pl031_local *ldata = dev_get_drvdata(&adev->dev); + + if (ldata) { + dev_set_drvdata(&adev->dev, NULL); + free_irq(adev->irq[0], ldata->rtc); + rtc_device_unregister(ldata->rtc); + iounmap(ldata->base); + kfree(ldata); + } + + return 0; +} + +static int pl031_probe(struct amba_device *adev, void *id) +{ + int ret; + struct pl031_local *ldata; + + + ldata = kmalloc(sizeof(struct pl031_local), GFP_KERNEL); + if (!ldata) { + ret = -ENOMEM; + goto out; + } + dev_set_drvdata(&adev->dev, ldata); + + ldata->base = ioremap(adev->res.start, + adev->res.end - adev->res.start + 1); + if (!ldata->base) { + ret = -ENOMEM; + goto out_no_remap; + } + + if (request_irq(adev->irq[0], pl031_interrupt, SA_INTERRUPT, + "rtc-pl031", ldata->rtc)) { + ret = -EIO; + goto out_no_irq; + } + + ldata->rtc = rtc_device_register("pl031", &adev->dev, &pl031_ops, + THIS_MODULE); + if (IS_ERR(ldata->rtc)) { + ret = PTR_ERR(ldata->rtc); + goto out_no_rtc; + } + + return 0; + +out_no_rtc: + free_irq(adev->irq[0], ldata->rtc); +out_no_irq: + iounmap(ldata->base); +out_no_remap: + dev_set_drvdata(&adev->dev, NULL); + kfree(ldata); +out: + return ret; +} + +static struct amba_id pl031_ids[] __initdata = { + { + .id = 0x00041031, + .mask = 0x000fffff, }, + {0, 0}, +}; + +static struct amba_driver pl031_driver = { + .drv = { + .name = "rtc-pl031", + }, + .id_table = pl031_ids, + .probe = pl031_probe, + .remove = pl031_remove, +}; + +static int __init pl031_init(void) +{ + return amba_driver_register(&pl031_driver); +} + +static void __exit pl031_exit(void) +{ + amba_driver_unregister(&pl031_driver); +} + +module_init(pl031_init); +module_exit(pl031_exit); + +MODULE_AUTHOR("Deepak Saxena <dsaxena@plexity.net"); +MODULE_DESCRIPTION("ARM AMBA PL031 RTC Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c index a997529..ab486fb 100644 --- a/drivers/rtc/rtc-sa1100.c +++ b/drivers/rtc/rtc-sa1100.c @@ -229,8 +229,6 @@ static int sa1100_rtc_ioctl(struct device *dev, unsigned int cmd, spin_unlock_irq(&sa1100_rtc_lock); return 0; case RTC_PIE_ON: - if ((rtc_freq > 64) && !capable(CAP_SYS_RESOURCE)) - return -EACCES; spin_lock_irq(&sa1100_rtc_lock); OSMR1 = TIMER_FREQ/rtc_freq + OSCR; OIER |= OIER_E1; @@ -242,8 +240,6 @@ static int sa1100_rtc_ioctl(struct device *dev, unsigned int cmd, case RTC_IRQP_SET: if (arg < 1 || arg > TIMER_FREQ) return -EINVAL; - if ((arg > 64) && (!capable(CAP_SYS_RESOURCE))) - return -EACCES; rtc_freq = arg; return 0; } diff --git a/drivers/rtc/rtc-v3020.c b/drivers/rtc/rtc-v3020.c new file mode 100644 index 0000000..a40f400 --- /dev/null +++ b/drivers/rtc/rtc-v3020.c @@ -0,0 +1,264 @@ +/* drivers/rtc/rtc-v3020.c + * + * Copyright (C) 2006 8D Technologies inc. + * Copyright (C) 2004 Compulab Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Driver for the V3020 RTC + * + * Changelog: + * + * 10-May-2006: Raphael Assenat <raph@8d.com> + * - Converted to platform driver + * - Use the generic rtc class + * + * ??-???-2004: Someone at Compulab + * - Initial driver creation. + * + */ +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/rtc.h> +#include <linux/types.h> +#include <linux/bcd.h> +#include <linux/rtc-v3020.h> + +#include <asm/io.h> + +#undef DEBUG + +struct v3020 { + void __iomem *ioaddress; + int leftshift; + struct rtc_device *rtc; +}; + +static void v3020_set_reg(struct v3020 *chip, unsigned char address, + unsigned char data) +{ + int i; + unsigned char tmp; + + tmp = address; + for (i = 0; i < 4; i++) { + writel((tmp & 1) << chip->leftshift, chip->ioaddress); + tmp >>= 1; + } + + /* Commands dont have data */ + if (!V3020_IS_COMMAND(address)) { + for (i = 0; i < 8; i++) { + writel((data & 1) << chip->leftshift, chip->ioaddress); + data >>= 1; + } + } +} + +static unsigned char v3020_get_reg(struct v3020 *chip, unsigned char address) +{ + unsigned int data=0; + int i; + + for (i = 0; i < 4; i++) { + writel((address & 1) << chip->leftshift, chip->ioaddress); + address >>= 1; + } + + for (i = 0; i < 8; i++) { + data >>= 1; + if (readl(chip->ioaddress) & (1 << chip->leftshift)) + data |= 0x80; + } + + return data; +} + +static int v3020_read_time(struct device *dev, struct rtc_time *dt) +{ + struct v3020 *chip = dev_get_drvdata(dev); + int tmp; + + /* Copy the current time to ram... */ + v3020_set_reg(chip, V3020_CMD_CLOCK2RAM, 0); + + /* ...and then read constant values. */ + tmp = v3020_get_reg(chip, V3020_SECONDS); + dt->tm_sec = BCD2BIN(tmp); + tmp = v3020_get_reg(chip, V3020_MINUTES); + dt->tm_min = BCD2BIN(tmp); + tmp = v3020_get_reg(chip, V3020_HOURS); + dt->tm_hour = BCD2BIN(tmp); + tmp = v3020_get_reg(chip, V3020_MONTH_DAY); + dt->tm_mday = BCD2BIN(tmp); + tmp = v3020_get_reg(chip, V3020_MONTH); + dt->tm_mon = BCD2BIN(tmp); + tmp = v3020_get_reg(chip, V3020_WEEK_DAY); + dt->tm_wday = BCD2BIN(tmp); + tmp = v3020_get_reg(chip, V3020_YEAR); + dt->tm_year = BCD2BIN(tmp)+100; + +#ifdef DEBUG + printk("\n%s : Read RTC values\n",__FUNCTION__); + printk("tm_hour: %i\n",dt->tm_hour); + printk("tm_min : %i\n",dt->tm_min); + printk("tm_sec : %i\n",dt->tm_sec); + printk("tm_year: %i\n",dt->tm_year); + printk("tm_mon : %i\n",dt->tm_mon); + printk("tm_mday: %i\n",dt->tm_mday); + printk("tm_wday: %i\n",dt->tm_wday); +#endif + + return 0; +} + + +static int v3020_set_time(struct device *dev, struct rtc_time *dt) +{ + struct v3020 *chip = dev_get_drvdata(dev); + +#ifdef DEBUG + printk("\n%s : Setting RTC values\n",__FUNCTION__); + printk("tm_sec : %i\n",dt->tm_sec); + printk("tm_min : %i\n",dt->tm_min); + printk("tm_hour: %i\n",dt->tm_hour); + printk("tm_mday: %i\n",dt->tm_mday); + printk("tm_wday: %i\n",dt->tm_wday); + printk("tm_year: %i\n",dt->tm_year); +#endif + + /* Write all the values to ram... */ + v3020_set_reg(chip, V3020_SECONDS, BIN2BCD(dt->tm_sec)); + v3020_set_reg(chip, V3020_MINUTES, BIN2BCD(dt->tm_min)); + v3020_set_reg(chip, V3020_HOURS, BIN2BCD(dt->tm_hour)); + v3020_set_reg(chip, V3020_MONTH_DAY, BIN2BCD(dt->tm_mday)); + v3020_set_reg(chip, V3020_MONTH, BIN2BCD(dt->tm_mon)); + v3020_set_reg(chip, V3020_WEEK_DAY, BIN2BCD(dt->tm_wday)); + v3020_set_reg(chip, V3020_YEAR, BIN2BCD(dt->tm_year % 100)); + + /* ...and set the clock. */ + v3020_set_reg(chip, V3020_CMD_RAM2CLOCK, 0); + + /* Compulab used this delay here. I dont know why, + * the datasheet does not specify a delay. */ + /*mdelay(5);*/ + + return 0; +} + +static struct rtc_class_ops v3020_rtc_ops = { + .read_time = v3020_read_time, + .set_time = v3020_set_time, +}; + +static int rtc_probe(struct platform_device *pdev) +{ + struct v3020_platform_data *pdata = pdev->dev.platform_data; + struct v3020 *chip; + struct rtc_device *rtc; + int retval = -EBUSY; + int i; + int temp; + + if (pdev->num_resources != 1) + return -EBUSY; + + if (pdev->resource[0].flags != IORESOURCE_MEM) + return -EBUSY; + + if (pdev == NULL) + return -EBUSY; + + chip = kzalloc(sizeof *chip, GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->leftshift = pdata->leftshift; + chip->ioaddress = ioremap(pdev->resource[0].start, 1); + if (chip->ioaddress == NULL) + goto err_chip; + + /* Make sure the v3020 expects a communication cycle + * by reading 8 times */ + for (i = 0; i < 8; i++) + temp = readl(chip->ioaddress); + + /* Test chip by doing a write/read sequence + * to the chip ram */ + v3020_set_reg(chip, V3020_SECONDS, 0x33); + if(v3020_get_reg(chip, V3020_SECONDS) != 0x33) { + retval = -ENODEV; + goto err_io; + } + + /* Make sure frequency measurment mode, test modes, and lock + * are all disabled */ + v3020_set_reg(chip, V3020_STATUS_0, 0x0); + + dev_info(&pdev->dev, "Chip available at physical address 0x%p," + "data connected to D%d\n", + (void*)pdev->resource[0].start, + chip->leftshift); + + platform_set_drvdata(pdev, chip); + + rtc = rtc_device_register("v3020", + &pdev->dev, &v3020_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) { + retval = PTR_ERR(rtc); + goto err_io; + } + chip->rtc = rtc; + + return 0; + +err_io: + iounmap(chip->ioaddress); +err_chip: + kfree(chip); + + return retval; +} + +static int rtc_remove(struct platform_device *dev) +{ + struct v3020 *chip = platform_get_drvdata(dev); + struct rtc_device *rtc = chip->rtc; + + if (rtc) + rtc_device_unregister(rtc); + + iounmap(chip->ioaddress); + kfree(chip); + + return 0; +} + +static struct platform_driver rtc_device_driver = { + .probe = rtc_probe, + .remove = rtc_remove, + .driver = { + .name = "v3020", + .owner = THIS_MODULE, + }, +}; + +static __init int v3020_init(void) +{ + return platform_driver_register(&rtc_device_driver); +} + +static __exit void v3020_exit(void) +{ + platform_driver_unregister(&rtc_device_driver); +} + +module_init(v3020_init); +module_exit(v3020_exit); + +MODULE_DESCRIPTION("V3020 RTC"); +MODULE_AUTHOR("Raphael Assenat"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-vr41xx.c b/drivers/rtc/rtc-vr41xx.c index 277596c..33e0292 100644 --- a/drivers/rtc/rtc-vr41xx.c +++ b/drivers/rtc/rtc-vr41xx.c @@ -81,7 +81,6 @@ MODULE_LICENSE("GPL"); #define RTC_FREQUENCY 32768 #define MAX_PERIODIC_RATE 6553 -#define MAX_USER_PERIODIC_RATE 64 static void __iomem *rtc1_base; static void __iomem *rtc2_base; @@ -240,9 +239,6 @@ static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long if (arg > MAX_PERIODIC_RATE) return -EINVAL; - if (arg > MAX_USER_PERIODIC_RATE && capable(CAP_SYS_RESOURCE) == 0) - return -EACCES; - periodic_frequency = arg; count = RTC_FREQUENCY; @@ -263,10 +259,6 @@ static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long /* Doesn't support before 1900 */ if (arg < 1900) return -EINVAL; - - if (capable(CAP_SYS_TIME) == 0) - return -EACCES; - epoch = arg; break; default: |