From patchwork Wed Nov 25 12:15:55 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wan ZongShun X-Patchwork-Id: 39312 Return-Path: <3ByANSwkJCX8pfxrv.frpjpdlo.frpuwf-olqx0jrrjohjurxsv.frp@listserv.bounces.google.com> X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from mail-pw0-f62.google.com (mail-pw0-f62.google.com [209.85.160.62]) by ozlabs.org (Postfix) with ESMTP id CDE8EB6F15 for ; Wed, 25 Nov 2009 23:16:09 +1100 (EST) Received: by pwj21 with SMTP id 21sf1602357pwj.1 for ; Wed, 25 Nov 2009 04:16:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:x-beenthere:received:received:received :received:received-spf:received:received:received:message-id:date :from:user-agent:mime-version:to:subject :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:x-thread-url:x-message-url :list-unsubscribe:list-subscribe:content-type; bh=yYbgsSyCIbaJMkkguDY5NG4v4KDjpM6RpoM53I61lTo=; b=rwetoQ+ZgmqCz2eO3Eq9hpoARFVhsy6lRyVL/u27v3qi20tPPjGxgh6xlvQs/hvTZ1 dVBiwr5cH62k1UFCQT25SfTZcncjI/xEom3Fj7bsInYMAQqdmeV8vmScj4pw9J7YzcbF Tl+aq5lW4YrQUJ7q+qUnuhSHQEnzub2HOmC5M= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=x-beenthere:received-spf:message-id:date:from:user-agent :mime-version:to:subject:x-original-authentication-results:reply-to :precedence:mailing-list:list-id:list-post:list-help:list-archive :x-thread-url:x-message-url:list-unsubscribe:list-subscribe :content-type; b=vdXDwPaH3BX8nBjdrG1qKHynq8kUmkXCCHAYgco/trveOJbqYxO/hP8tvNKIBVRQD9 sc/VeVdklL9tVkz3cAFLXE9pyVHpBs15dYrd2DnKBxTdNqIKEFJuoRZjOZSXGtyK7hPE hf1rJbqCUcs73ao6pC+8DFPJmn1HRMlwGgd5M= Received: by 10.115.100.28 with SMTP id c28mr246637wam.24.1259151367570; Wed, 25 Nov 2009 04:16:07 -0800 (PST) X-BeenThere: rtc-linux@googlegroups.com Received: by 10.141.213.15 with SMTP id p15ls193927rvq.3.p; Wed, 25 Nov 2009 04:16:06 -0800 (PST) Received: by 10.140.192.7 with SMTP id p7mr1681768rvf.11.1259151366775; Wed, 25 Nov 2009 04:16:06 -0800 (PST) Received: by 10.140.192.7 with SMTP id p7mr1681766rvf.11.1259151366750; Wed, 25 Nov 2009 04:16:06 -0800 (PST) Received: from mail-pw0-f52.google.com (mail-pw0-f52.google.com [209.85.160.52]) by gmr-mx.google.com with ESMTP id 17si1537353pxi.7.2009.11.25.04.16.05; Wed, 25 Nov 2009 04:16:05 -0800 (PST) Received-SPF: pass (google.com: domain of mcuos.com@gmail.com designates 209.85.160.52 as permitted sender) client-ip=209.85.160.52; Received: by mail-pw0-f52.google.com with SMTP id 9so5627293pwj.31 for ; Wed, 25 Nov 2009 04:16:05 -0800 (PST) Received: by 10.114.237.18 with SMTP id k18mr4188556wah.63.1259151364939; Wed, 25 Nov 2009 04:16:04 -0800 (PST) Received: from ?192.169.0.164? ([116.226.94.165]) by mx.google.com with ESMTPS id 21sm1248274pzk.15.2009.11.25.04.16.00 (version=TLSv1/SSLv3 cipher=RC4-MD5); Wed, 25 Nov 2009 04:16:04 -0800 (PST) Message-ID: <4B0D1FFB.5060403@gmail.com> Date: Wed, 25 Nov 2009 20:15:55 +0800 From: Wan ZongShun User-Agent: Thunderbird 2.0.0.23 (X11/20090817) MIME-Version: 1.0 To: Alessandro Zummo , linux-rtc , linux-arm-kernel , linux-kernel Subject: [rtc-linux] [PATCH V3] ARM: NUC900: add RTC driver support for nuc910 and nuc920 X-Original-Authentication-Results: gmr-mx.google.com; spf=pass (google.com: domain of mcuos.com@gmail.com designates 209.85.160.52 as permitted sender) smtp.mail=mcuos.com@gmail.com; dkim=pass (test mode) header.i=@gmail.com Reply-To: rtc-linux@googlegroups.com Precedence: list Mailing-list: list rtc-linux@googlegroups.com; contact rtc-linux+owners@googlegroups.com List-ID: List-Post: , List-Help: , List-Archive: X-Thread-Url: http://groups.google.com/group/rtc-linux/t/20284c3bb8abd5db X-Message-Url: http://groups.google.com/group/rtc-linux/msg/165c12f42048aec2 List-Unsubscribe: , List-Subscribe: , Dear Alessandro, This is a fixed patch which was tested via rtc test program located in Documentation/rtc.txt. Thanks for your help. Signed-off-by: Wan ZongShun --- drivers/rtc/Kconfig | 6 + drivers/rtc/Makefile | 1 + drivers/rtc/rtc-nuc900.c | 334 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 341 insertions(+), 0 deletions(-) create mode 100644 drivers/rtc/rtc-nuc900.c diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 3c20dae..266ce62 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -573,6 +573,12 @@ config RTC_DRV_AB3100 Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC support. This chip contains a battery- and capacitor-backed RTC. +config RTC_DRV_NUC900 + tristate "NUC910/NUC920 RTC driver" + depends on RTC_CLASS && ARCH_W90X900 + help + If you say yes here you get support for the RTC subsystem of the + NUC910/NUC920 used in embedded systems. comment "on-CPU RTC drivers" diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index aa3fbd5..d511774 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -53,6 +53,7 @@ obj-$(CONFIG_RTC_MXC) += rtc-mxc.o obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o +obj-$(CONFIG_RTC_DRV_NUC900) += rtc-nuc900.o obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o obj-$(CONFIG_RTC_DRV_PCAP) += rtc-pcap.o obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o diff --git a/drivers/rtc/rtc-nuc900.c b/drivers/rtc/rtc-nuc900.c new file mode 100644 index 0000000..09383e2 --- /dev/null +++ b/drivers/rtc/rtc-nuc900.c @@ -0,0 +1,334 @@ +/* + * Copyright (c) 2008-2009 Nuvoton technology corporation. + * + * Wan ZongShun + * + * 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;version 2 of the License. + * + */ + +#include +#include +#include +#include +#include +#include +#include + +/* RTC Control Registers */ +#define REG_RTC_INIR 0x00 +#define REG_RTC_AER 0x04 +#define REG_RTC_FCR 0x08 +#define REG_RTC_TLR 0x0C +#define REG_RTC_CLR 0x10 +#define REG_RTC_TSSR 0x14 +#define REG_RTC_DWR 0x18 +#define REG_RTC_TAR 0x1C +#define REG_RTC_CAR 0x20 +#define REG_RTC_LIR 0x24 +#define REG_RTC_RIER 0x28 +#define REG_RTC_RIIR 0x2C +#define REG_RTC_TTR 0x30 + +#define RTCSET 0x01 +#define AERRWENB 0x10000 +#define INIRRESET 0xa5eb1357 +#define AERPOWERON 0xA965 +#define AERPOWEROFF 0x0000 +#define LEAPYEAR 0x0001 +#define TICKENB 0x80 +#define TICKINTENB 0x0002 +#define ALARMINTENB 0x0001 +#define MODE24 0x0001 + +struct nuc900_rtc { + int irq_num; + void __iomem *rtc_reg; + struct rtc_device *rtcdev; + spinlock_t lock; +}; + +struct nuc900_bcd_time { + int bcd_sec; + int bcd_min; + int bcd_hour; + int bcd_mday; + int bcd_mon; + int bcd_year; +}; + +static irqreturn_t nuc900_rtc_interrupt(int irq, void *_rtc) +{ + struct nuc900_rtc *rtc = _rtc; + unsigned long events = 0, rtc_irq; + + rtc_irq = __raw_readl(rtc->rtc_reg + REG_RTC_RIIR); + + if (rtc_irq & ALARMINTENB) { + rtc_irq &= ~ALARMINTENB; + __raw_writel(rtc_irq, rtc->rtc_reg + REG_RTC_RIIR); + events |= RTC_AF | RTC_IRQF; + } + + if (rtc_irq & TICKINTENB) { + rtc_irq &= ~TICKINTENB; + __raw_writel(rtc_irq, rtc->rtc_reg + REG_RTC_RIIR); + events |= RTC_UF | RTC_IRQF; + } + + rtc_update_irq(rtc->rtcdev, 1, events); + + return IRQ_HANDLED; +} + +static void check_rtc_power(struct nuc900_rtc *nuc900_rtc) +{ + unsigned int i; + __raw_writel(INIRRESET, nuc900_rtc->rtc_reg + REG_RTC_INIR); + + mdelay(10); + + __raw_writel(AERPOWERON, nuc900_rtc->rtc_reg + REG_RTC_AER); + + for (i = 0; i < 1000000; i++) { + if (__raw_readl(nuc900_rtc->rtc_reg + REG_RTC_AER) & AERRWENB) + break; + } +} + +static void nuc900_rtc_bcd2bin(unsigned int timereg, + unsigned int calreg, struct rtc_time *tm) +{ + tm->tm_mday = bcd2bin(calreg >> 0); + tm->tm_mon = bcd2bin(calreg >> 8); + tm->tm_year = bcd2bin(calreg >> 16) + 100; + + tm->tm_sec = bcd2bin(timereg >> 0); + tm->tm_min = bcd2bin(timereg >> 8); + tm->tm_hour = bcd2bin(timereg >> 16); + + rtc_valid_tm(tm); +} + +static void nuc900_rtc_bin2bcd(struct rtc_time *settm, + struct nuc900_bcd_time *gettm) +{ + gettm->bcd_mday = bin2bcd(settm->tm_mday) << 0; + gettm->bcd_mon = bin2bcd(settm->tm_mon) << 8; + gettm->bcd_year = bin2bcd(settm->tm_year - 100) << 16; + + gettm->bcd_sec = bin2bcd(settm->tm_sec) << 0; + gettm->bcd_min = bin2bcd(settm->tm_min) << 8; + gettm->bcd_hour = bin2bcd(settm->tm_hour) << 16; +} + +static int nuc900_update_irq_enable(struct device *dev, unsigned int enabled) +{ + struct nuc900_rtc *rtc = dev_get_drvdata(dev); + + if (enabled) + __raw_writel(__raw_readl(rtc->rtc_reg + REG_RTC_RIER)| + (TICKINTENB), rtc->rtc_reg + REG_RTC_RIER); + else + __raw_writel(__raw_readl(rtc->rtc_reg + REG_RTC_RIER)& + (~TICKINTENB), rtc->rtc_reg + REG_RTC_RIER); + + return 0; +} + +static int nuc900_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct nuc900_rtc *rtc = dev_get_drvdata(dev); + + if (enabled) + __raw_writel(__raw_readl(rtc->rtc_reg + REG_RTC_RIER)| + (ALARMINTENB), rtc->rtc_reg + REG_RTC_RIER); + else + __raw_writel(__raw_readl(rtc->rtc_reg + REG_RTC_RIER)& + (~ALARMINTENB), rtc->rtc_reg + REG_RTC_RIER); + + return 0; +} + +static int nuc900_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct nuc900_rtc *rtc = dev_get_drvdata(dev); + unsigned int timeval, clrval; + + timeval = __raw_readl(rtc->rtc_reg + REG_RTC_TLR); + clrval = __raw_readl(rtc->rtc_reg + REG_RTC_CLR); + + nuc900_rtc_bcd2bin(timeval, clrval, tm); + + return 0; +} + +static int nuc900_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct nuc900_rtc *rtc = dev_get_drvdata(dev); + struct nuc900_bcd_time gettm; + unsigned long val; + + nuc900_rtc_bin2bcd(tm, &gettm); + + check_rtc_power(rtc); + + val = gettm.bcd_mday | gettm.bcd_mon | gettm.bcd_year; + __raw_writel(val, rtc->rtc_reg + REG_RTC_CLR); + + val = gettm.bcd_sec | gettm.bcd_min | gettm.bcd_hour; + __raw_writel(val, rtc->rtc_reg + REG_RTC_TLR); + + return 0; +} + +static int nuc900_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct nuc900_rtc *rtc = dev_get_drvdata(dev); + unsigned int timeval, carval; + + timeval = __raw_readl(rtc->rtc_reg + REG_RTC_TAR); + carval = __raw_readl(rtc->rtc_reg + REG_RTC_CAR); + + nuc900_rtc_bcd2bin(timeval, carval, &alrm->time); + + return 0; +} + +static int nuc900_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct nuc900_rtc *rtc = dev_get_drvdata(dev); + struct nuc900_bcd_time tm; + unsigned long val; + + nuc900_rtc_bin2bcd(&alrm->time, &tm); + + check_rtc_power(rtc); + + val = tm.bcd_mday | tm.bcd_mon | tm.bcd_year; + __raw_writel(val, rtc->rtc_reg + REG_RTC_CAR); + + val = tm.bcd_sec | tm.bcd_min | tm.bcd_hour; + __raw_writel(val, rtc->rtc_reg + REG_RTC_TAR); + + return 0; +} + +static struct rtc_class_ops nuc900_rtc_ops = { + .read_time = nuc900_rtc_read_time, + .set_time = nuc900_rtc_set_time, + .read_alarm = nuc900_rtc_read_alarm, + .set_alarm = nuc900_rtc_set_alarm, + .alarm_irq_enable = nuc900_alarm_irq_enable, + .update_irq_enable = nuc900_update_irq_enable, +}; + +static int __devinit nuc900_rtc_probe(struct platform_device *pdev) +{ + struct resource *res; + struct nuc900_rtc *nuc900_rtc; + int err = 0; + + nuc900_rtc = kzalloc(sizeof(struct nuc900_rtc), GFP_KERNEL); + if (!nuc900_rtc) { + dev_err(&pdev->dev, "kzalloc nuc900_rtc failed\n"); + return -ENOMEM; + } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "platform_get_resource failed\n"); + err = -ENXIO; + goto fail1; + } + + if (!request_mem_region(res->start, resource_size(res), + pdev->name)) { + dev_err(&pdev->dev, "request_mem_region failed\n"); + err = -EBUSY; + goto fail1; + } + + nuc900_rtc->rtc_reg = ioremap(res->start, resource_size(res)); + if (!nuc900_rtc->rtc_reg) { + dev_err(&pdev->dev, "ioremap rtc_reg failed\n"); + err = -ENOMEM; + goto fail2; + } + + nuc900_rtc->irq_num = platform_get_irq(pdev, 0); + if (request_irq(nuc900_rtc->irq_num, nuc900_rtc_interrupt, + IRQF_DISABLED, "nuc900rtc", nuc900_rtc)) { + dev_err(&pdev->dev, "NUC900 RTC request irq failed\n"); + err = -EBUSY; + goto fail3; + } + + nuc900_rtc->rtcdev = rtc_device_register(pdev->name, &pdev->dev, + &nuc900_rtc_ops, THIS_MODULE); + if (IS_ERR(nuc900_rtc->rtcdev)) { + dev_err(&pdev->dev, "rtc device register faild\n"); + err = PTR_ERR(nuc900_rtc->rtcdev); + goto fail4; + } + + platform_set_drvdata(pdev, nuc900_rtc); + __raw_writel(__raw_readl(nuc900_rtc->rtc_reg + REG_RTC_TSSR) | MODE24, + nuc900_rtc->rtc_reg + REG_RTC_TSSR); + + dev_info(&pdev->dev, "NUC900 RTC device probe successfully\n"); + + return 0; + +fail4: free_irq(nuc900_rtc->irq_num, nuc900_rtc); +fail3: iounmap(nuc900_rtc->rtc_reg); +fail2: release_mem_region(res->start, resource_size(res)); +fail1: kfree(nuc900_rtc); + return err; +} + +static int __devexit nuc900_rtc_remove(struct platform_device *pdev) +{ + struct nuc900_rtc *nuc900_rtc = platform_get_drvdata(pdev); + struct resource *res; + + rtc_device_unregister(nuc900_rtc->rtcdev); + free_irq(nuc900_rtc->irq_num, nuc900_rtc); + iounmap(nuc900_rtc->rtc_reg); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + release_mem_region(res->start, resource_size(res)); + + kfree(nuc900_rtc); + + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver nuc900_rtc_driver = { + .remove = __devexit_p(nuc900_rtc_remove), + .driver = { + .name = "nuc900-rtc", + .owner = THIS_MODULE, + }, +}; + +static int __init nuc900_rtc_init(void) +{ + return platform_driver_probe(&nuc900_rtc_driver, nuc900_rtc_probe); +} + +static void __exit nuc900_rtc_exit(void) +{ + platform_driver_unregister(&nuc900_rtc_driver); +} + +module_init(nuc900_rtc_init); +module_exit(nuc900_rtc_exit); + +MODULE_AUTHOR("Wan ZongShun "); +MODULE_DESCRIPTION("nuc910/nuc920 RTC driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:nuc900-rtc");