diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/rtc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/rtc/rtc-pcap.c | 224 |
3 files changed, 232 insertions, 0 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 8455de86e2bf..3c20dae43ce2 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -820,4 +820,11 @@ config RTC_DRV_STMP This driver can also be built as a module. If so, the module will be called rtc-stmp3xxx. +config RTC_DRV_PCAP + tristate "PCAP RTC" + depends on EZX_PCAP + help + If you say Y here you will get support for the RTC found on + the PCAP2 ASIC used on some Motorola phones. + endif # RTC_CLASS diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 82c718bdaf10..aa3fbd5517a1 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -54,6 +54,7 @@ obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o +obj-$(CONFIG_RTC_DRV_PCAP) += rtc-pcap.o obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o obj-$(CONFIG_RTC_DRV_PCF8583) += rtc-pcf8583.o obj-$(CONFIG_RTC_DRV_PCF2123) += rtc-pcf2123.o diff --git a/drivers/rtc/rtc-pcap.c b/drivers/rtc/rtc-pcap.c new file mode 100644 index 000000000000..a99c28992d21 --- /dev/null +++ b/drivers/rtc/rtc-pcap.c @@ -0,0 +1,224 @@ +/* + * pcap rtc code for Motorola EZX phones + * + * Copyright (c) 2008 guiming zhuo <gmzhuo@gmail.com> + * Copyright (c) 2009 Daniel Ribeiro <drwyrm@gmail.com> + * + * Based on Motorola's rtc.c Copyright (c) 2003-2005 Motorola + * + * 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/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/mfd/ezx-pcap.h> +#include <linux/rtc.h> +#include <linux/platform_device.h> + +struct pcap_rtc { + struct pcap_chip *pcap; + struct rtc_device *rtc; +}; + +static irqreturn_t pcap_rtc_irq(int irq, void *_pcap_rtc) +{ + struct pcap_rtc *pcap_rtc = _pcap_rtc; + unsigned long rtc_events; + + if (irq == pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ)) + rtc_events = RTC_IRQF | RTC_UF; + else if (irq == pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA)) + rtc_events = RTC_IRQF | RTC_AF; + else + rtc_events = 0; + + rtc_update_irq(pcap_rtc->rtc, 1, rtc_events); + return IRQ_HANDLED; +} + +static int pcap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct platform_device *pdev = to_platform_device(dev); + struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev); + struct rtc_time *tm = &alrm->time; + unsigned long secs; + u32 tod; /* time of day, seconds since midnight */ + u32 days; /* days since 1/1/1970 */ + + ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_TODA, &tod); + secs = tod & PCAP_RTC_TOD_MASK; + + ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_DAYA, &days); + secs += (days & PCAP_RTC_DAY_MASK) * SEC_PER_DAY; + + rtc_time_to_tm(secs, tm); + + return 0; +} + +static int pcap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct platform_device *pdev = to_platform_device(dev); + struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev); + struct rtc_time *tm = &alrm->time; + unsigned long secs; + u32 tod, days; + + rtc_tm_to_time(tm, &secs); + + tod = secs % SEC_PER_DAY; + ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_TODA, tod); + + days = secs / SEC_PER_DAY; + ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_DAYA, days); + + return 0; +} + +static int pcap_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct platform_device *pdev = to_platform_device(dev); + struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev); + unsigned long secs; + u32 tod, days; + + ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_TOD, &tod); + secs = tod & PCAP_RTC_TOD_MASK; + + ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_DAY, &days); + secs += (days & PCAP_RTC_DAY_MASK) * SEC_PER_DAY; + + rtc_time_to_tm(secs, tm); + + return rtc_valid_tm(tm); +} + +static int pcap_rtc_set_mmss(struct device *dev, unsigned long secs) +{ + struct platform_device *pdev = to_platform_device(dev); + struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev); + u32 tod, days; + + tod = secs % SEC_PER_DAY; + ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_TOD, tod); + + days = secs / SEC_PER_DAY; + ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_DAY, days); + + return 0; +} + +static int pcap_rtc_irq_enable(struct device *dev, int pirq, unsigned int en) +{ + struct platform_device *pdev = to_platform_device(dev); + struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev); + + if (en) + enable_irq(pcap_to_irq(pcap_rtc->pcap, pirq)); + else + disable_irq(pcap_to_irq(pcap_rtc->pcap, pirq)); + + return 0; +} + +static int pcap_rtc_alarm_irq_enable(struct device *dev, unsigned int en) +{ + return pcap_rtc_irq_enable(dev, PCAP_IRQ_TODA, en); +} + +static int pcap_rtc_update_irq_enable(struct device *dev, unsigned int en) +{ + return pcap_rtc_irq_enable(dev, PCAP_IRQ_1HZ, en); +} + +static const struct rtc_class_ops pcap_rtc_ops = { + .read_time = pcap_rtc_read_time, + .read_alarm = pcap_rtc_read_alarm, + .set_alarm = pcap_rtc_set_alarm, + .set_mmss = pcap_rtc_set_mmss, + .alarm_irq_enable = pcap_rtc_alarm_irq_enable, + .update_irq_enable = pcap_rtc_update_irq_enable, +}; + +static int __devinit pcap_rtc_probe(struct platform_device *pdev) +{ + struct pcap_rtc *pcap_rtc; + int timer_irq, alarm_irq; + int err = -ENOMEM; + + pcap_rtc = kmalloc(sizeof(struct pcap_rtc), GFP_KERNEL); + if (!pcap_rtc) + return err; + + pcap_rtc->pcap = dev_get_drvdata(pdev->dev.parent); + + pcap_rtc->rtc = rtc_device_register("pcap", &pdev->dev, + &pcap_rtc_ops, THIS_MODULE); + if (IS_ERR(pcap_rtc->rtc)) { + err = PTR_ERR(pcap_rtc->rtc); + goto fail_rtc; + } + + platform_set_drvdata(pdev, pcap_rtc); + + timer_irq = pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ); + alarm_irq = pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA); + + err = request_irq(timer_irq, pcap_rtc_irq, 0, "RTC Timer", pcap_rtc); + if (err) + goto fail_timer; + + err = request_irq(alarm_irq, pcap_rtc_irq, 0, "RTC Alarm", pcap_rtc); + if (err) + goto fail_alarm; + + return 0; +fail_alarm: + free_irq(timer_irq, pcap_rtc); +fail_timer: + rtc_device_unregister(pcap_rtc->rtc); +fail_rtc: + kfree(pcap_rtc); + return err; +} + +static int __devexit pcap_rtc_remove(struct platform_device *pdev) +{ + struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev); + + free_irq(pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ), pcap_rtc); + free_irq(pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA), pcap_rtc); + rtc_device_unregister(pcap_rtc->rtc); + kfree(pcap_rtc); + + return 0; +} + +static struct platform_driver pcap_rtc_driver = { + .remove = __devexit_p(pcap_rtc_remove), + .driver = { + .name = "pcap-rtc", + .owner = THIS_MODULE, + }, +}; + +static int __init rtc_pcap_init(void) +{ + return platform_driver_probe(&pcap_rtc_driver, pcap_rtc_probe); +} + +static void __exit rtc_pcap_exit(void) +{ + platform_driver_unregister(&pcap_rtc_driver); +} + +module_init(rtc_pcap_init); +module_exit(rtc_pcap_exit); + +MODULE_DESCRIPTION("Motorola pcap rtc driver"); +MODULE_AUTHOR("guiming zhuo <gmzhuo@gmail.com>"); +MODULE_LICENSE("GPL"); |