From 149aa9be835531498eef25ba8c84ae31c72b5258 Mon Sep 17 00:00:00 2001 From: Deepak Saxena Date: Sun, 25 Jun 2006 05:47:38 -0700 Subject: [PATCH] --- yaml --- r: 29695 b: refs/heads/master c: 8ae6e163c1b637e1cb125613726ffbd31ca44fdf h: refs/heads/master i: 29693: 0e44a0be390443c39fcb4bb3c6c4d95e8cb30a14 29691: 7fec03a2c02205ce259753cba1edfa44d79ce6d2 29687: fb0d8d2c3c39071a62a315edf99238385f4acfb2 29679: 2ca1219c7779fb4007e545a8945ccd896b2db9b4 29663: 7f4d897d096fd04ccdfc4a6761e3643cf1a4b106 29631: 27b7e3a0539887fabc9e17c906537865f76fbada 29567: b0e398123b9345faf6d01855aa621af0815ad497 29439: d7a8cd60ba761d03273c6864907ed2a4cd107b25 29183: abd228295c198bf53d6215ade6d8ea92636507c5 28671: 73b9451df9198b02366b93eb8a57542bfb852ac0 v: v3 --- [refs] | 2 +- trunk/drivers/rtc/Kconfig | 10 ++ trunk/drivers/rtc/Makefile | 1 + trunk/drivers/rtc/rtc-pl031.c | 233 ++++++++++++++++++++++++++++++++++ 4 files changed, 245 insertions(+), 1 deletion(-) create mode 100644 trunk/drivers/rtc/rtc-pl031.c diff --git a/[refs] b/[refs] index 46d103a43f49..2a4a8c74cbcc 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: dcd96379613a3cbe87c30e1c20122ecdcdf3a4b8 +refs/heads/master: 8ae6e163c1b637e1cb125613726ffbd31ca44fdf diff --git a/trunk/drivers/rtc/Kconfig b/trunk/drivers/rtc/Kconfig index 65d090dbef46..875ff5e5792a 100644 --- a/trunk/drivers/rtc/Kconfig +++ b/trunk/drivers/rtc/Kconfig @@ -157,6 +157,16 @@ config RTC_DRV_VR41XX To compile this driver as a module, choose M here: the module will be called rtc-vr41xx. +config RTC_DRV_PL031 + tristate "ARM AMBA PL031 RTC" + depends on RTC_CLASS && ARM_AMBA + help + If you say Y here you will get access to ARM AMBA + PrimeCell PL031 UART found on certain ARM SOCs. + + To compile this driver as a module, choose M here: the + module will be called rtc-pl031. + config RTC_DRV_TEST tristate "Test driver/device" depends on RTC_CLASS diff --git a/trunk/drivers/rtc/Makefile b/trunk/drivers/rtc/Makefile index a9ca0f171686..1b3f32ecec80 100644 --- a/trunk/drivers/rtc/Makefile +++ b/trunk/drivers/rtc/Makefile @@ -20,3 +20,4 @@ obj-$(CONFIG_RTC_DRV_M48T86) += rtc-m48t86.o obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o obj-$(CONFIG_RTC_DRV_SA1100) += rtc-sa1100.o obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o +obj-$(CONFIG_RTC_DRV_PL031) += rtc-pl031.o diff --git a/trunk/drivers/rtc/rtc-pl031.c b/trunk/drivers/rtc/rtc-pl031.c new file mode 100644 index 000000000000..ee538632660b --- /dev/null +++ b/trunk/drivers/rtc/rtc-pl031.c @@ -0,0 +1,233 @@ +/* + * drivers/rtc/rtc-pl031.c + * + * Real Time Clock interface for ARM AMBA PrimeCell 031 RTC + * + * Author: Deepak Saxena + * + * Copyright 2006 (c) MontaVista Software, Inc. + * + * 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 + +#include +#include +#include +#include +#include + +/* + * Register definitions + */ +#define RTC_DR 0x00 /* Data read register */ +#define RTC_MR 0x04 /* Match register */ +#define RTC_LR 0x08 /* Data load register */ +#define RTC_CR 0x0c /* Control register */ +#define RTC_IMSC 0x10 /* Interrupt mask and set register */ +#define RTC_RIS 0x14 /* Raw interrupt status register */ +#define RTC_MIS 0x18 /* Masked interrupt status register */ +#define RTC_ICR 0x1c /* Interrupt clear register */ + +struct pl031_local { + struct rtc_device *rtc; + void __iomem *base; +}; + +static irqreturn_t pl031_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct rtc_device *rtc = dev_id; + + rtc_update_irq(&rtc->class_dev, 1, RTC_AF); + + return IRQ_HANDLED; +} + +static int pl031_open(struct device *dev) +{ + /* + * We request IRQ in pl031_probe, so nothing to do here... + */ + return 0; +} + +static void pl031_release(struct device *dev) +{ +} + +static int pl031_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) +{ + struct pl031_local *ldata = dev_get_drvdata(dev); + + switch (cmd) { + case RTC_AIE_OFF: + __raw_writel(1, ldata->base + RTC_MIS); + return 0; + case RTC_AIE_ON: + __raw_writel(0, ldata->base + RTC_MIS); + return 0; + } + + return -ENOIOCTLCMD; +} + +static int pl031_read_time(struct device *dev, struct rtc_time *tm) +{ + struct pl031_local *ldata = dev_get_drvdata(dev); + + rtc_time_to_tm(__raw_readl(ldata->base + RTC_DR), tm); + + return 0; +} + +static int pl031_set_time(struct device *dev, struct rtc_time *tm) +{ + unsigned long time; + struct pl031_local *ldata = dev_get_drvdata(dev); + + rtc_tm_to_time(tm, &time); + __raw_writel(time, ldata->base + RTC_LR); + + return 0; +} + +static int pl031_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + struct pl031_local *ldata = dev_get_drvdata(dev); + + rtc_time_to_tm(__raw_readl(ldata->base + RTC_MR), &alarm->time); + alarm->pending = __raw_readl(ldata->base + RTC_RIS); + alarm->enabled = __raw_readl(ldata->base + RTC_IMSC); + + return 0; +} + +static int pl031_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + struct pl031_local *ldata = dev_get_drvdata(dev); + unsigned long time; + + rtc_tm_to_time(&alarm->time, &time); + + __raw_writel(time, ldata->base + RTC_MR); + __raw_writel(!alarm->enabled, ldata->base + RTC_MIS); + + return 0; +} + +static struct rtc_class_ops pl031_ops = { + .open = pl031_open, + .release = pl031_release, + .ioctl = pl031_ioctl, + .read_time = pl031_read_time, + .set_time = pl031_set_time, + .read_alarm = pl031_read_alarm, + .set_alarm = pl031_set_alarm, +}; + +static int pl031_remove(struct amba_device *adev) +{ + struct pl031_local *ldata = dev_get_drvdata(&adev->dev); + + if (ldata) { + dev_set_drvdata(&adev->dev, NULL); + free_irq(adev->irq[0], ldata->rtc); + rtc_device_unregister(ldata->rtc); + iounmap(ldata->base); + kfree(ldata); + } + + return 0; +} + +static int pl031_probe(struct amba_device *adev, void *id) +{ + int ret; + struct pl031_local *ldata; + + + ldata = kmalloc(sizeof(struct pl031_local), GFP_KERNEL); + if (!ldata) { + ret = -ENOMEM; + goto out; + } + dev_set_drvdata(&adev->dev, ldata); + + ldata->base = ioremap(adev->res.start, + adev->res.end - adev->res.start + 1); + if (!ldata->base) { + ret = -ENOMEM; + goto out_no_remap; + } + + if (request_irq(adev->irq[0], pl031_interrupt, SA_INTERRUPT, + "rtc-pl031", ldata->rtc)) { + ret = -EIO; + goto out_no_irq; + } + + ldata->rtc = rtc_device_register("pl031", &adev->dev, &pl031_ops, + THIS_MODULE); + if (IS_ERR(ldata->rtc)) { + ret = PTR_ERR(ldata->rtc); + goto out_no_rtc; + } + + return 0; + +out_no_rtc: + free_irq(adev->irq[0], ldata->rtc); +out_no_irq: + iounmap(ldata->base); +out_no_remap: + dev_set_drvdata(&adev->dev, NULL); + kfree(ldata); +out: + return ret; +} + +static struct amba_id pl031_ids[] __initdata = { + { + .id = 0x00041031, + .mask = 0x000fffff, }, + {0, 0}, +}; + +static struct amba_driver pl031_driver = { + .drv = { + .name = "rtc-pl031", + }, + .id_table = pl031_ids, + .probe = pl031_probe, + .remove = pl031_remove, +}; + +static int __init pl031_init(void) +{ + return amba_driver_register(&pl031_driver); +} + +static void __exit pl031_exit(void) +{ + amba_driver_unregister(&pl031_driver); +} + +module_init(pl031_init); +module_exit(pl031_exit); + +MODULE_AUTHOR("Deepak Saxena