Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754331AbZAESPh (ORCPT ); Mon, 5 Jan 2009 13:15:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752952AbZAESPF (ORCPT ); Mon, 5 Jan 2009 13:15:05 -0500 Received: from mail.openmoko.org ([88.198.124.205]:37722 "EHLO mail.openmoko.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752692AbZAESPC (ORCPT ); Mon, 5 Jan 2009 13:15:02 -0500 Subject: [PATCH V3 4/7] rtc: PCF50633 rtc driver To: linux-kernel@vger.kernel.org From: Balaji Rao Cc: Paul Gortmaker , Samuel Ortiz , Andy Green , rtc-linux@googlegroups.com Date: Mon, 05 Jan 2009 23:44:31 +0530 Message-ID: <20090105181431.7559.14399.stgit@fedora.yogi> In-Reply-To: <20090105181242.7559.30087.stgit@fedora.yogi> References: <20090105181242.7559.30087.stgit@fedora.yogi> User-Agent: StGit/0.14.3.292.gb975.dirty 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: 11278 Lines: 404 Signed-off-by: Balaji Rao Cc: Andy Green Cc: Alessandro Zummo Cc: Paul Gortmaker Cc: rtc-linux@googlegroups.com --- Changes from V1: - Removed include/linux/mfd/pcf50633/rtc.h and moved defenitions into the source file. - Remove PIE and introduce UIE support. UIE being the one actually supported in the chip. Changes from V2: - Updated the driver to use new interfaces for alarm/update. --- drivers/rtc/Kconfig | 7 + drivers/rtc/Makefile | 1 drivers/rtc/rtc-pcf50633.c | 344 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 352 insertions(+), 0 deletions(-) create mode 100644 drivers/rtc/rtc-pcf50633.c diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 165a818..63b1fea 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -501,6 +501,13 @@ 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 RTC subsystem of the + NXP PCF50633 used in embedded systems. + 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..f4dd87e --- /dev/null +++ b/drivers/rtc/rtc-pcf50633.c @@ -0,0 +1,344 @@ +/* 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. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define PCF50633_REG_RTCSC 0x59 /* Second */ +#define PCF50633_REG_RTCMN 0x5a /* Minute */ +#define PCF50633_REG_RTCHR 0x5b /* Hour */ +#define PCF50633_REG_RTCWD 0x5c /* Weekday */ +#define PCF50633_REG_RTCDT 0x5d /* Day */ +#define PCF50633_REG_RTCMT 0x5e /* Month */ +#define PCF50633_REG_RTCYR 0x5f /* Year */ +#define PCF50633_REG_RTCSCA 0x60 /* Alarm Second */ +#define PCF50633_REG_RTCMNA 0x61 /* Alarm Minute */ +#define PCF50633_REG_RTCHRA 0x62 /* Alarm Hour */ +#define PCF50633_REG_RTCWDA 0x63 /* Alarm Weekday */ +#define PCF50633_REG_RTCDTA 0x64 /* Alarm Day */ +#define PCF50633_REG_RTCMTA 0x65 /* Alarm Month */ +#define PCF50633_REG_RTCYRA 0x66 /* Alarm Year */ + +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]; +}; + +struct pcf50633_rtc { + int alarm_enabled; + int second_enabled; + + struct pcf50633 *pcf; + struct rtc_device *rtc_dev; +}; + +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_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct pcf50633_rtc *rtc = dev_get_drvdata(dev); + int err; + + if (enabled) + err = pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM); + else + err = pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM); + + if (err < 0) + return err; + + rtc->alarm_enabled = enabled; + + return 0; +} + +static int +pcf50633_rtc_update_irq_enable(struct device *dev, unsigned int enabled) +{ + struct pcf50633_rtc *rtc = dev_get_drvdata(dev); + int err; + + if (enabled) + err = pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_SECOND); + else + err = pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_SECOND); + + if (err < 0) + return err; + + rtc->second_enabled = enabled; + + return 0; +} + +static int pcf50633_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct pcf50633_rtc *rtc; + struct pcf50633_time pcf_tm; + int ret; + + rtc = dev_get_drvdata(dev); + + ret = pcf50633_read_block(rtc->pcf, PCF50633_REG_RTCSC, + PCF50633_TI_EXTENT, + &pcf_tm.time[0]); + if (ret != PCF50633_TI_EXTENT) { + dev_err(dev, "Failed to read time\n"); + return -EIO; + } + + 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 rtc_valid_tm(tm); +} + +static int pcf50633_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct pcf50633_rtc *rtc; + struct pcf50633_time pcf_tm; + int second_masked, alarm_masked, ret = 0; + + rtc = 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(rtc->pcf, PCF50633_IRQ_SECOND); + alarm_masked = pcf50633_irq_mask_get(rtc->pcf, PCF50633_IRQ_ALARM); + + if (!second_masked) + pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_SECOND); + if (!alarm_masked) + pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM); + + /* Returns 0 on success */ + ret = pcf50633_write_block(rtc->pcf, PCF50633_REG_RTCSC, + PCF50633_TI_EXTENT, + &pcf_tm.time[0]); + + if (!second_masked) + pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_SECOND); + if (!alarm_masked) + pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM); + + return ret; +} + +static int pcf50633_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct pcf50633_rtc *rtc; + struct pcf50633_time pcf_tm; + int ret = 0; + + rtc = dev_get_drvdata(dev); + + alrm->enabled = rtc->alarm_enabled; + + ret = pcf50633_read_block(rtc->pcf, PCF50633_REG_RTCSCA, + PCF50633_TI_EXTENT, &pcf_tm.time[0]); + if (ret != PCF50633_TI_EXTENT) { + dev_err(dev, "Failed to read time\n"); + return -EIO; + } + + pcf2rtc_time(&alrm->time, &pcf_tm); + + return rtc_valid_tm(&alrm->time); +} + +static int pcf50633_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct pcf50633_rtc *rtc; + struct pcf50633_time pcf_tm; + int alarm_masked, ret = 0; + + rtc = 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(rtc->pcf, PCF50633_IRQ_ALARM); + + /* disable alarm interrupt */ + if (!alarm_masked) + pcf50633_irq_mask(rtc->pcf, PCF50633_IRQ_ALARM); + + /* Returns 0 on success */ + ret = pcf50633_write_block(rtc->pcf, PCF50633_REG_RTCSCA, + PCF50633_TI_EXTENT, &pcf_tm.time[0]); + + if (!alarm_masked) + pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM); + + return ret; +} + +static struct rtc_class_ops pcf50633_rtc_ops = { + .read_time = pcf50633_rtc_read_time, + .set_time = pcf50633_rtc_set_time, + .read_alarm = pcf50633_rtc_read_alarm, + .set_alarm = pcf50633_rtc_set_alarm, + .alarm_irq_enable = pcf50633_rtc_alarm_irq_enable, + .update_irq_enable = pcf50633_rtc_update_irq_enable, +}; + +static void pcf50633_rtc_irq(int irq, void *data) +{ + struct pcf50633_rtc *rtc = data; + + switch (irq) { + case PCF50633_IRQ_ALARM: + rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF); + break; + case PCF50633_IRQ_SECOND: + rtc_update_irq(rtc->rtc_dev, 1, RTC_UF | RTC_IRQF); + break; + } +} + +static int __devinit pcf50633_rtc_probe(struct platform_device *pdev) +{ + struct pcf50633_subdev_pdata *pdata; + struct pcf50633_rtc *rtc; + + + rtc = kzalloc(sizeof(*rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + pdata = pdev->dev.platform_data; + rtc->pcf = pdata->pcf; + platform_set_drvdata(pdev, rtc); + rtc->rtc_dev = rtc_device_register("pcf50633-rtc", &pdev->dev, + &pcf50633_rtc_ops, THIS_MODULE); + + if (IS_ERR(rtc->rtc_dev)) { + kfree(rtc); + return PTR_ERR(rtc->rtc_dev); + } + + pcf50633_register_irq(rtc->pcf, PCF50633_IRQ_ALARM, + pcf50633_rtc_irq, rtc); + pcf50633_register_irq(rtc->pcf, PCF50633_IRQ_SECOND, + pcf50633_rtc_irq, rtc); + + return 0; +} + +static int __devexit pcf50633_rtc_remove(struct platform_device *pdev) +{ + struct pcf50633_rtc *rtc; + + rtc = platform_get_drvdata(pdev); + + pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_ALARM); + pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_SECOND); + + rtc_device_unregister(rtc->rtc_dev); + kfree(rtc); + + 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"); + -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/