Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754767AbYLNLfv (ORCPT ); Sun, 14 Dec 2008 06:35:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753565AbYLNLf0 (ORCPT ); Sun, 14 Dec 2008 06:35:26 -0500 Received: from mail.openmoko.org ([88.198.124.205]:34170 "EHLO mail.openmoko.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753181AbYLNLfZ (ORCPT ); Sun, 14 Dec 2008 06:35:25 -0500 From: Balaji Rao Subject: [PATCH 4/7] rtc: PCF50633 rtc driver To: linux-kernel@vger.kernel.org Cc: Balaji Rao , Andy Green , Alessandro Zummo , Paul Gortmaker Date: Sun, 14 Dec 2008 16:33:05 +0530 Message-ID: <20081214110304.3307.53502.stgit@cff.thadambail> In-Reply-To: <20081214110152.3307.50843.stgit@cff.thadambail> References: <20081214110152.3307.50843.stgit@cff.thadambail> User-Agent: StGIT/0.14.3.270.g0f36 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 9886 Lines: 351 Signed-off-by: Balaji Rao Cc: Andy Green Cc: Alessandro Zummo Cc: Paul Gortmaker --- drivers/rtc/Kconfig | 6 + drivers/rtc/Makefile | 1 drivers/rtc/rtc-pcf50633.c | 302 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 309 insertions(+), 0 deletions(-) create mode 100644 drivers/rtc/rtc-pcf50633.c diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 123092d..68e68d2 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -497,6 +497,12 @@ config RTC_DRV_WM8350 This driver can also be built as a module. If so, the module will be called "rtc-wm8350". +config RTC_DRV_PCF50633 + depends on MFD_PCF50633 + tristate "NXP PCF50633 RTC" + help + If you say yes here you get support for the NXP PCF50633 RTC. + comment "on-CPU RTC drivers" config RTC_DRV_OMAP diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 6e79c91..a717fec 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -70,3 +70,4 @@ obj-$(CONFIG_RTC_DRV_V3020) += rtc-v3020.o obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o obj-$(CONFIG_RTC_DRV_WM8350) += rtc-wm8350.o obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o +obj-$(CONFIG_RTC_DRV_PCF50633) += rtc-pcf50633.o diff --git a/drivers/rtc/rtc-pcf50633.c b/drivers/rtc/rtc-pcf50633.c new file mode 100644 index 0000000..f314810 --- /dev/null +++ b/drivers/rtc/rtc-pcf50633.c @@ -0,0 +1,302 @@ +/* NXP PCF50633 RTC Driver + * + * (C) 2006-2008 by Openmoko, Inc. + * Author: Balaji Rao + * All rights reserved. + * + * Broken down from monstrous PCF50633 driver mainly by + * Harald Welte, Andy Green and Werner Almesberger + * + * 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 +#include +#include + +#include +#include + +enum pcf50633_time_indexes { + PCF50633_TI_SEC, + PCF50633_TI_MIN, + PCF50633_TI_HOUR, + PCF50633_TI_WKDAY, + PCF50633_TI_DAY, + PCF50633_TI_MONTH, + PCF50633_TI_YEAR, + PCF50633_TI_EXTENT /* always last */ +}; + + +struct pcf50633_time { + u_int8_t time[PCF50633_TI_EXTENT]; +}; + +static void pcf2rtc_time(struct rtc_time *rtc, struct pcf50633_time *pcf) +{ + rtc->tm_sec = bcd2bin(pcf->time[PCF50633_TI_SEC]); + rtc->tm_min = bcd2bin(pcf->time[PCF50633_TI_MIN]); + rtc->tm_hour = bcd2bin(pcf->time[PCF50633_TI_HOUR]); + rtc->tm_wday = bcd2bin(pcf->time[PCF50633_TI_WKDAY]); + rtc->tm_mday = bcd2bin(pcf->time[PCF50633_TI_DAY]); + rtc->tm_mon = bcd2bin(pcf->time[PCF50633_TI_MONTH]); + rtc->tm_year = bcd2bin(pcf->time[PCF50633_TI_YEAR]) + 100; +} + +static void rtc2pcf_time(struct pcf50633_time *pcf, struct rtc_time *rtc) +{ + pcf->time[PCF50633_TI_SEC] = bin2bcd(rtc->tm_sec); + pcf->time[PCF50633_TI_MIN] = bin2bcd(rtc->tm_min); + pcf->time[PCF50633_TI_HOUR] = bin2bcd(rtc->tm_hour); + pcf->time[PCF50633_TI_WKDAY] = bin2bcd(rtc->tm_wday); + pcf->time[PCF50633_TI_DAY] = bin2bcd(rtc->tm_mday); + pcf->time[PCF50633_TI_MONTH] = bin2bcd(rtc->tm_mon); + pcf->time[PCF50633_TI_YEAR] = bin2bcd(rtc->tm_year - 100); +} + +static int +pcf50633_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +{ + struct pcf50633 *pcf; + + pcf = dev_get_drvdata(dev); + + switch (cmd) { + case RTC_AIE_OFF: + pcf->rtc.alarm_enabled = 0; + pcf50633_irq_mask(pcf, PCF50633_IRQ_ALARM); + return 0; + case RTC_AIE_ON: + pcf->rtc.alarm_enabled = 1; + pcf50633_irq_unmask(pcf, PCF50633_IRQ_ALARM); + return 0; + case RTC_PIE_OFF: + pcf->rtc.second_enabled = 0; + pcf50633_irq_mask(pcf, PCF50633_IRQ_SECOND); + return 0; + case RTC_PIE_ON: + pcf->rtc.second_enabled = 1; + pcf50633_irq_unmask(pcf, PCF50633_IRQ_SECOND); + return 0; + } + + return -ENOIOCTLCMD; +} + +static int pcf50633_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct pcf50633 *pcf; + struct pcf50633_time pcf_tm; + int ret; + + pcf = dev_get_drvdata(dev); + + ret = pcf50633_read_block(pcf, PCF50633_REG_RTCSC, + PCF50633_TI_EXTENT, + &pcf_tm.time[0]); + if (ret != PCF50633_TI_EXTENT) + dev_err(dev, "Failed to read time\n"); + + dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n", + pcf_tm.time[PCF50633_TI_DAY], + pcf_tm.time[PCF50633_TI_MONTH], + pcf_tm.time[PCF50633_TI_YEAR], + pcf_tm.time[PCF50633_TI_HOUR], + pcf_tm.time[PCF50633_TI_MIN], + pcf_tm.time[PCF50633_TI_SEC]); + + pcf2rtc_time(tm, &pcf_tm); + + dev_dbg(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n", + tm->tm_mday, tm->tm_mon, tm->tm_year, + tm->tm_hour, tm->tm_min, tm->tm_sec); + + return 0; +} + +static int pcf50633_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct pcf50633 *pcf; + struct pcf50633_time pcf_tm; + int second_masked, alarm_masked, ret = 0; + + pcf = dev_get_drvdata(dev); + + dev_dbg(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n", + tm->tm_mday, tm->tm_mon, tm->tm_year, + tm->tm_hour, tm->tm_min, tm->tm_sec); + + rtc2pcf_time(&pcf_tm, tm); + + dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n", + pcf_tm.time[PCF50633_TI_DAY], + pcf_tm.time[PCF50633_TI_MONTH], + pcf_tm.time[PCF50633_TI_YEAR], + pcf_tm.time[PCF50633_TI_HOUR], + pcf_tm.time[PCF50633_TI_MIN], + pcf_tm.time[PCF50633_TI_SEC]); + + + second_masked = pcf50633_irq_mask_get(pcf, PCF50633_IRQ_SECOND); + alarm_masked = pcf50633_irq_mask_get(pcf, PCF50633_IRQ_ALARM); + + if (!second_masked) + pcf50633_irq_mask(pcf, PCF50633_IRQ_SECOND); + if (!alarm_masked) + pcf50633_irq_mask(pcf, PCF50633_IRQ_ALARM); + + ret = pcf50633_write_block(pcf, PCF50633_REG_RTCSC, + PCF50633_TI_EXTENT, + &pcf_tm.time[0]); + if (ret) + dev_err(dev, "Failed to set time %d\n", ret); + + if (!second_masked) + pcf50633_irq_unmask(pcf, PCF50633_IRQ_SECOND); + if (!alarm_masked) + pcf50633_irq_unmask(pcf, PCF50633_IRQ_ALARM); + + return ret; +} + +static int pcf50633_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct pcf50633 *pcf; + struct pcf50633_time pcf_tm; + int ret = 0; + + pcf = dev_get_drvdata(dev); + + alrm->enabled = pcf->rtc.alarm_enabled; + + ret = pcf50633_read_block(pcf, PCF50633_REG_RTCSCA, + PCF50633_TI_EXTENT, &pcf_tm.time[0]); + + if (ret != PCF50633_TI_EXTENT) + dev_err(dev, "Failed to read Alarm time %d\n", ret); + + pcf2rtc_time(&alrm->time, &pcf_tm); + + return ret; +} + +static int pcf50633_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct pcf50633 *pcf; + struct pcf50633_time pcf_tm; + int alarm_masked, ret = 0; + + pcf = dev_get_drvdata(dev); + + rtc2pcf_time(&pcf_tm, &alrm->time); + + /* do like mktime does and ignore tm_wday */ + pcf_tm.time[PCF50633_TI_WKDAY] = 7; + + alarm_masked = pcf50633_irq_mask_get(pcf, PCF50633_IRQ_ALARM); + + /* disable alarm interrupt */ + if (!alarm_masked) + pcf50633_irq_mask(pcf, PCF50633_IRQ_ALARM); + + ret = pcf50633_write_block(pcf, PCF50633_REG_RTCSCA, + PCF50633_TI_EXTENT, &pcf_tm.time[0]); + if (ret) + dev_err(dev, "Failed to write alarm time %d\n", ret); + + if (!alarm_masked) + pcf50633_irq_unmask(pcf, PCF50633_IRQ_ALARM); + + return ret; +} +static struct rtc_class_ops pcf50633_rtc_ops = { + .ioctl = pcf50633_rtc_ioctl, + .read_time = pcf50633_rtc_read_time, + .set_time = pcf50633_rtc_set_time, + .read_alarm = pcf50633_rtc_read_alarm, + .set_alarm = pcf50633_rtc_set_alarm, +}; + +static void pcf50633_rtc_irq(struct pcf50633 *pcf, int irq, void *unused) +{ + switch (irq) { + case PCF50633_IRQ_ALARM: + rtc_update_irq(pcf->rtc.rtc_dev, 1, RTC_AF | RTC_IRQF); + break; + case PCF50633_IRQ_SECOND: + rtc_update_irq(pcf->rtc.rtc_dev, 1, RTC_PF | RTC_IRQF); + break; + } +} + +static int pcf50633_rtc_probe(struct platform_device *pdev) +{ + struct rtc_device *rtc; + struct pcf50633 *pcf; + + rtc = rtc_device_register("pcf50633-rtc", &pdev->dev, + &pcf50633_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc)) + return -ENODEV; + + pcf = platform_get_drvdata(pdev); + + /* Set up IRQ handlers */ + pcf->irq_handler[PCF50633_IRQ_ALARM].handler = pcf50633_rtc_irq; + pcf->irq_handler[PCF50633_IRQ_SECOND].handler = pcf50633_rtc_irq; + + pcf->rtc.rtc_dev = rtc; + + return 0; +} + +static int pcf50633_rtc_remove(struct platform_device *pdev) +{ + struct pcf50633 *pcf; + + pcf = platform_get_drvdata(pdev); + rtc_device_unregister(pcf->rtc.rtc_dev); + + return 0; +} + + +static struct platform_driver pcf50633_rtc_driver = { + .driver = { + .name = "pcf50633-rtc", + }, + .probe = pcf50633_rtc_probe, + .remove = __devexit_p(pcf50633_rtc_remove), +}; + +static int __init pcf50633_rtc_init(void) +{ + return platform_driver_register(&pcf50633_rtc_driver); +} +module_init(pcf50633_rtc_init); + +static void __exit pcf50633_rtc_exit(void) +{ + platform_driver_unregister(&pcf50633_rtc_driver); +} +module_exit(pcf50633_rtc_exit); + + +MODULE_DESCRIPTION("PCF50633 RTC driver"); +MODULE_AUTHOR("Balaji Rao "); +MODULE_LICENSE("GPL"); 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