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Release 4.14 drivers/rtc/rtc-pxa.c

Directory: drivers/rtc
/*
 * Real Time Clock interface for XScale PXA27x and PXA3xx
 *
 * Copyright (C) 2008 Robert Jarzmik
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/rtc.h>
#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_device.h>

#include <mach/hardware.h>

#include "rtc-sa1100.h"


#define RTC_DEF_DIVIDER		(32768 - 1)

#define RTC_DEF_TRIM		0

#define MAXFREQ_PERIODIC	1000

/*
 * PXA Registers and bits definitions
 */

#define RTSR_PICE	(1 << 15)	
/* Periodic interrupt count enable */

#define RTSR_PIALE	(1 << 14)	
/* Periodic interrupt Alarm enable */

#define RTSR_PIAL	(1 << 13)	
/* Periodic interrupt detected */

#define RTSR_SWALE2	(1 << 11)	
/* RTC stopwatch alarm2 enable */

#define RTSR_SWAL2	(1 << 10)	
/* RTC stopwatch alarm2 detected */

#define RTSR_SWALE1	(1 << 9)	
/* RTC stopwatch alarm1 enable */

#define RTSR_SWAL1	(1 << 8)	
/* RTC stopwatch alarm1 detected */

#define RTSR_RDALE2	(1 << 7)	
/* RTC alarm2 enable */

#define RTSR_RDAL2	(1 << 6)	
/* RTC alarm2 detected */

#define RTSR_RDALE1	(1 << 5)	
/* RTC alarm1 enable */

#define RTSR_RDAL1	(1 << 4)	
/* RTC alarm1 detected */

#define RTSR_HZE	(1 << 3)	
/* HZ interrupt enable */

#define RTSR_ALE	(1 << 2)	
/* RTC alarm interrupt enable */

#define RTSR_HZ		(1 << 1)	
/* HZ rising-edge detected */

#define RTSR_AL		(1 << 0)	
/* RTC alarm detected */

#define RTSR_TRIG_MASK	(RTSR_AL | RTSR_HZ | RTSR_RDAL1 | RTSR_RDAL2\
                         | RTSR_SWAL1 | RTSR_SWAL2)

#define RYxR_YEAR_S	9

#define RYxR_YEAR_MASK	(0xfff << RYxR_YEAR_S)

#define RYxR_MONTH_S	5

#define RYxR_MONTH_MASK	(0xf << RYxR_MONTH_S)

#define RYxR_DAY_MASK	0x1f

#define RDxR_WOM_S     20

#define RDxR_WOM_MASK  (0x7 << RDxR_WOM_S)

#define RDxR_DOW_S     17

#define RDxR_DOW_MASK  (0x7 << RDxR_DOW_S)

#define RDxR_HOUR_S	12

#define RDxR_HOUR_MASK	(0x1f << RDxR_HOUR_S)

#define RDxR_MIN_S	6

#define RDxR_MIN_MASK	(0x3f << RDxR_MIN_S)

#define RDxR_SEC_MASK	0x3f


#define RTSR		0x08

#define RTTR		0x0c

#define RDCR		0x10

#define RYCR		0x14

#define RDAR1		0x18

#define RYAR1		0x1c

#define RTCPICR		0x34

#define PIAR		0x38


#define rtc_readl(pxa_rtc, reg)	\
	__raw_readl((pxa_rtc)->base + (reg))

#define rtc_writel(pxa_rtc, reg, value)	\
	__raw_writel((value), (pxa_rtc)->base + (reg))


struct pxa_rtc {
	
struct sa1100_rtc sa1100_rtc;
	
struct resource	*ress;
	
void __iomem		*base;
	
struct rtc_device	*rtc;
	
spinlock_t		lock;		/* Protects this structure */
};



static u32 ryxr_calc(struct rtc_time *tm) { return ((tm->tm_year + 1900) << RYxR_YEAR_S) | ((tm->tm_mon + 1) << RYxR_MONTH_S) | tm->tm_mday; }

Contributors

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Robert Jarzmik40100.00%1100.00%
Total40100.00%1100.00%


static u32 rdxr_calc(struct rtc_time *tm) { return ((((tm->tm_mday + 6) / 7) << RDxR_WOM_S) & RDxR_WOM_MASK) | (((tm->tm_wday + 1) << RDxR_DOW_S) & RDxR_DOW_MASK) | (tm->tm_hour << RDxR_HOUR_S) | (tm->tm_min << RDxR_MIN_S) | tm->tm_sec; }

Contributors

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Leo Song3652.94%150.00%
Robert Jarzmik3247.06%150.00%
Total68100.00%2100.00%


static void tm_calc(u32 rycr, u32 rdcr, struct rtc_time *tm) { tm->tm_year = ((rycr & RYxR_YEAR_MASK) >> RYxR_YEAR_S) - 1900; tm->tm_mon = (((rycr & RYxR_MONTH_MASK) >> RYxR_MONTH_S)) - 1; tm->tm_mday = (rycr & RYxR_DAY_MASK); tm->tm_wday = ((rycr & RDxR_DOW_MASK) >> RDxR_DOW_S) - 1; tm->tm_hour = (rdcr & RDxR_HOUR_MASK) >> RDxR_HOUR_S; tm->tm_min = (rdcr & RDxR_MIN_MASK) >> RDxR_MIN_S; tm->tm_sec = rdcr & RDxR_SEC_MASK; }

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Robert Jarzmik9385.32%150.00%
Leo Song1614.68%150.00%
Total109100.00%2100.00%


static void rtsr_clear_bits(struct pxa_rtc *pxa_rtc, u32 mask) { u32 rtsr; rtsr = rtc_readl(pxa_rtc, RTSR); rtsr &= ~RTSR_TRIG_MASK; rtsr &= ~mask; rtc_writel(pxa_rtc, RTSR, rtsr); }

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Robert Jarzmik45100.00%1100.00%
Total45100.00%1100.00%


static void rtsr_set_bits(struct pxa_rtc *pxa_rtc, u32 mask) { u32 rtsr; rtsr = rtc_readl(pxa_rtc, RTSR); rtsr &= ~RTSR_TRIG_MASK; rtsr |= mask; rtc_writel(pxa_rtc, RTSR, rtsr); }

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Robert Jarzmik44100.00%1100.00%
Total44100.00%1100.00%


static irqreturn_t pxa_rtc_irq(int irq, void *dev_id) { struct platform_device *pdev = to_platform_device(dev_id); struct pxa_rtc *pxa_rtc = platform_get_drvdata(pdev); u32 rtsr; unsigned long events = 0; spin_lock(&pxa_rtc->lock); /* clear interrupt sources */ rtsr = rtc_readl(pxa_rtc, RTSR); rtc_writel(pxa_rtc, RTSR, rtsr); /* temporary disable rtc interrupts */ rtsr_clear_bits(pxa_rtc, RTSR_RDALE1 | RTSR_PIALE | RTSR_HZE); /* clear alarm interrupt if it has occurred */ if (rtsr & RTSR_RDAL1) rtsr &= ~RTSR_RDALE1; /* update irq data & counter */ if (rtsr & RTSR_RDAL1) events |= RTC_AF | RTC_IRQF; if (rtsr & RTSR_HZ) events |= RTC_UF | RTC_IRQF; if (rtsr & RTSR_PIAL) events |= RTC_PF | RTC_IRQF; rtc_update_irq(pxa_rtc->rtc, 1, events); /* enable back rtc interrupts */ rtc_writel(pxa_rtc, RTSR, rtsr & ~RTSR_TRIG_MASK); spin_unlock(&pxa_rtc->lock); return IRQ_HANDLED; }

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Robert Jarzmik165100.00%1100.00%
Total165100.00%1100.00%


static int pxa_rtc_open(struct device *dev) { struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); int ret; ret = request_irq(pxa_rtc->sa1100_rtc.irq_1hz, pxa_rtc_irq, 0, "rtc 1Hz", dev); if (ret < 0) { dev_err(dev, "can't get irq %i, err %d\n", pxa_rtc->sa1100_rtc.irq_1hz, ret); goto err_irq_1Hz; } ret = request_irq(pxa_rtc->sa1100_rtc.irq_alarm, pxa_rtc_irq, 0, "rtc Alrm", dev); if (ret < 0) { dev_err(dev, "can't get irq %i, err %d\n", pxa_rtc->sa1100_rtc.irq_alarm, ret); goto err_irq_Alrm; } return 0; err_irq_Alrm: free_irq(pxa_rtc->sa1100_rtc.irq_1hz, dev); err_irq_1Hz: return ret; }

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PersonTokensPropCommitsCommitProp
Robert Jarzmik11887.41%133.33%
Rob Herring1511.11%133.33%
Yong Zhang21.48%133.33%
Total135100.00%3100.00%


static void pxa_rtc_release(struct device *dev) { struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); spin_lock_irq(&pxa_rtc->lock); rtsr_clear_bits(pxa_rtc, RTSR_PIALE | RTSR_RDALE1 | RTSR_HZE); spin_unlock_irq(&pxa_rtc->lock); free_irq(pxa_rtc->sa1100_rtc.irq_1hz, dev); free_irq(pxa_rtc->sa1100_rtc.irq_alarm, dev); }

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Robert Jarzmik6491.43%150.00%
Rob Herring68.57%150.00%
Total70100.00%2100.00%


static int pxa_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); spin_lock_irq(&pxa_rtc->lock); if (enabled) rtsr_set_bits(pxa_rtc, RTSR_RDALE1); else rtsr_clear_bits(pxa_rtc, RTSR_RDALE1); spin_unlock_irq(&pxa_rtc->lock); return 0; }

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Robert Jarzmik4673.02%150.00%
Wan ZongShun1726.98%150.00%
Total63100.00%2100.00%


static int pxa_rtc_read_time(struct device *dev, struct rtc_time *tm) { struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); u32 rycr, rdcr; rycr = rtc_readl(pxa_rtc, RYCR); rdcr = rtc_readl(pxa_rtc, RDCR); tm_calc(rycr, rdcr, tm); return 0; }

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Robert Jarzmik61100.00%1100.00%
Total61100.00%1100.00%


static int pxa_rtc_set_time(struct device *dev, struct rtc_time *tm) { struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); rtc_writel(pxa_rtc, RYCR, ryxr_calc(tm)); rtc_writel(pxa_rtc, RDCR, rdxr_calc(tm)); return 0; }

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Robert Jarzmik53100.00%1100.00%
Total53100.00%1100.00%


static int pxa_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); u32 rtsr, ryar, rdar; ryar = rtc_readl(pxa_rtc, RYAR1); rdar = rtc_readl(pxa_rtc, RDAR1); tm_calc(ryar, rdar, &alrm->time); rtsr = rtc_readl(pxa_rtc, RTSR); alrm->enabled = (rtsr & RTSR_RDALE1) ? 1 : 0; alrm->pending = (rtsr & RTSR_RDAL1) ? 1 : 0; return 0; }

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Robert Jarzmik103100.00%1100.00%
Total103100.00%1100.00%


static int pxa_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); u32 rtsr; spin_lock_irq(&pxa_rtc->lock); rtc_writel(pxa_rtc, RYAR1, ryxr_calc(&alrm->time)); rtc_writel(pxa_rtc, RDAR1, rdxr_calc(&alrm->time)); rtsr = rtc_readl(pxa_rtc, RTSR); if (alrm->enabled) rtsr |= RTSR_RDALE1; else rtsr &= ~RTSR_RDALE1; rtc_writel(pxa_rtc, RTSR, rtsr); spin_unlock_irq(&pxa_rtc->lock); return 0; }

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Robert Jarzmik112100.00%1100.00%
Total112100.00%1100.00%


static int pxa_rtc_proc(struct device *dev, struct seq_file *seq) { struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); seq_printf(seq, "trim/divider\t: 0x%08x\n", rtc_readl(pxa_rtc, RTTR)); seq_printf(seq, "update_IRQ\t: %s\n", (rtc_readl(pxa_rtc, RTSR) & RTSR_HZE) ? "yes" : "no"); seq_printf(seq, "periodic_IRQ\t: %s\n", (rtc_readl(pxa_rtc, RTSR) & RTSR_PIALE) ? "yes" : "no"); seq_printf(seq, "periodic_freq\t: %u\n", rtc_readl(pxa_rtc, PIAR)); return 0; }

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PersonTokensPropCommitsCommitProp
Robert Jarzmik101100.00%1100.00%
Total101100.00%1100.00%

static const struct rtc_class_ops pxa_rtc_ops = { .read_time = pxa_rtc_read_time, .set_time = pxa_rtc_set_time, .read_alarm = pxa_rtc_read_alarm, .set_alarm = pxa_rtc_set_alarm, .alarm_irq_enable = pxa_alarm_irq_enable, .proc = pxa_rtc_proc, };
static int __init pxa_rtc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct pxa_rtc *pxa_rtc; struct sa1100_rtc *sa1100_rtc; int ret; pxa_rtc = devm_kzalloc(dev, sizeof(*pxa_rtc), GFP_KERNEL); if (!pxa_rtc) return -ENOMEM; sa1100_rtc = &pxa_rtc->sa1100_rtc; spin_lock_init(&pxa_rtc->lock); platform_set_drvdata(pdev, pxa_rtc); pxa_rtc->ress = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!pxa_rtc->ress) { dev_err(dev, "No I/O memory resource defined\n"); return -ENXIO; } sa1100_rtc->irq_1hz = platform_get_irq(pdev, 0); if (sa1100_rtc->irq_1hz < 0) { dev_err(dev, "No 1Hz IRQ resource defined\n"); return -ENXIO; } sa1100_rtc->irq_alarm = platform_get_irq(pdev, 1); if (sa1100_rtc->irq_alarm < 0) { dev_err(dev, "No alarm IRQ resource defined\n"); return -ENXIO; } pxa_rtc->base = devm_ioremap(dev, pxa_rtc->ress->start, resource_size(pxa_rtc->ress)); if (!pxa_rtc->base) { dev_err(dev, "Unable to map pxa RTC I/O memory\n"); return -ENOMEM; } pxa_rtc_open(dev); sa1100_rtc->rcnr = pxa_rtc->base + 0x0; sa1100_rtc->rtsr = pxa_rtc->base + 0x8; sa1100_rtc->rtar = pxa_rtc->base + 0x4; sa1100_rtc->rttr = pxa_rtc->base + 0xc; ret = sa1100_rtc_init(pdev, sa1100_rtc); if (!ret) { dev_err(dev, "Unable to init SA1100 RTC sub-device\n"); return ret; } rtsr_clear_bits(pxa_rtc, RTSR_PIALE | RTSR_RDALE1 | RTSR_HZE); pxa_rtc->rtc = devm_rtc_device_register(&pdev->dev, "pxa-rtc", &pxa_rtc_ops, THIS_MODULE); if (IS_ERR(pxa_rtc->rtc)) { ret = PTR_ERR(pxa_rtc->rtc); dev_err(dev, "Failed to register RTC device -> %d\n", ret); return ret; } device_init_wakeup(dev, 1); return 0; }

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Robert Jarzmik18751.52%116.67%
Rob Herring7520.66%233.33%
Alessandro Zummo5815.98%116.67%
Jingoo Han3810.47%116.67%
Alexandre Belloni51.38%116.67%
Total363100.00%6100.00%


static int __exit pxa_rtc_remove(struct platform_device *pdev) { struct device *dev = &pdev->dev; pxa_rtc_release(dev); return 0; }

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Robert Jarzmik1550.00%133.33%
Leo Song1446.67%133.33%
Alessandro Zummo13.33%133.33%
Total30100.00%3100.00%

#ifdef CONFIG_OF static const struct of_device_id pxa_rtc_dt_ids[] = { { .compatible = "marvell,pxa-rtc" }, {} }; MODULE_DEVICE_TABLE(of, pxa_rtc_dt_ids); #endif #ifdef CONFIG_PM_SLEEP
static int pxa_rtc_suspend(struct device *dev) { struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); if (device_may_wakeup(dev)) enable_irq_wake(pxa_rtc->sa1100_rtc.irq_alarm); return 0; }

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Robert Jarzmik3792.50%266.67%
Rob Herring37.50%133.33%
Total40100.00%3100.00%


static int pxa_rtc_resume(struct device *dev) { struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev); if (device_may_wakeup(dev)) disable_irq_wake(pxa_rtc->sa1100_rtc.irq_alarm); return 0; }

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Robert Jarzmik3792.50%266.67%
Rob Herring37.50%133.33%
Total40100.00%3100.00%

#endif static SIMPLE_DEV_PM_OPS(pxa_rtc_pm_ops, pxa_rtc_suspend, pxa_rtc_resume); static struct platform_driver pxa_rtc_driver = { .remove = __exit_p(pxa_rtc_remove), .driver = { .name = "pxa-rtc", .of_match_table = of_match_ptr(pxa_rtc_dt_ids), .pm = &pxa_rtc_pm_ops, }, }; module_platform_driver_probe(pxa_rtc_driver, pxa_rtc_probe); MODULE_AUTHOR("Robert Jarzmik <robert.jarzmik@free.fr>"); MODULE_DESCRIPTION("PXA27x/PXA3xx Realtime Clock Driver (RTC)"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:pxa-rtc");

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PersonTokensPropCommitsCommitProp
Robert Jarzmik167281.24%316.67%
Rob Herring1095.30%211.11%
Leo Song823.98%211.11%
Alessandro Zummo653.16%15.56%
Jingoo Han522.53%422.22%
Daniel Mack432.09%15.56%
Wan ZongShun221.07%15.56%
Alexandre Belloni50.24%15.56%
Tejun Heo30.15%15.56%
Antonio Ospite30.15%15.56%
Yong Zhang20.10%15.56%
Total2058100.00%18100.00%
Directory: drivers/rtc
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