/* *  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/slab.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 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,}; 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); 	platform_set_drvdata(pdev, pcap_rtc); 	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;	}  	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:	platform_set_drvdata(pdev, NULL);	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");