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mirror of git://projects.qi-hardware.com/openwrt-xburst.git synced 2024-11-28 21:10:17 +02:00

Add jz4740-rtc driver.

This commit is contained in:
Lars-Peter Clausen 2009-09-20 19:56:40 +02:00 committed by Xiangfu Liu
parent 9480e0470b
commit 4c36a20b10
4 changed files with 380 additions and 0 deletions

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@ -253,7 +253,11 @@ CONFIG_PM=y
# CONFIG_PNX8550_STB810 is not set # CONFIG_PNX8550_STB810 is not set
CONFIG_PREEMPT=y CONFIG_PREEMPT=y
# CONFIG_PREEMPT_NONE is not set # CONFIG_PREEMPT_NONE is not set
# CONFIG_PROM_EMU is not set
CONFIG_RELAY=y CONFIG_RELAY=y
CONFIG_RTC_CLASS=y
# CONFIG_RTC_DRV_CMOS is not set
CONFIG_RTC_DRV_JZ4740=y
CONFIG_SCHED_OMIT_FRAME_POINTER=y CONFIG_SCHED_OMIT_FRAME_POINTER=y
# CONFIG_SCSI_DMA is not set # CONFIG_SCSI_DMA is not set
CONFIG_SDIO_UART=y CONFIG_SDIO_UART=y

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@ -113,6 +113,26 @@ static struct platform_device jz_mmc_device = {
.resource = jz_mmc_resources, .resource = jz_mmc_resources,
}; };
static struct resource jz_rtc_resources[] = {
[0] = {
.start = CPHYSADDR(RTC_BASE),
.end = CPHYSADDR(RTC_BASE) + 0x10,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = JZ_IRQ_RTC,
.end = JZ_IRQ_RTC,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device jz_rtc_device = {
.name = "jz4740-rtc",
.id = -1,
.num_resources = ARRAY_SIZE(jz_rtc_resources),
.resource = jz_rtc_resources,
};
/** I2C controller **/ /** I2C controller **/
static struct resource jz_i2c_resources[] = { static struct resource jz_i2c_resources[] = {
[0] = { [0] = {
@ -420,6 +440,7 @@ static struct platform_device *jz_platform_devices[] __initdata = {
&qi_lb60_fb, &qi_lb60_fb,
&jz_i2s_device, &jz_i2s_device,
&jz_codec_device, &jz_codec_device,
&jz_rtc_device,
}; };
static int __init jz_platform_init(void) static int __init jz_platform_init(void)

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@ -0,0 +1,325 @@
/*
* Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
* JZ4720/JZ4740 SoC RTC driver
*
* 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.
*
* 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/rtc.h>
#define JZ_REG_RTC_CTRL 0x00
#define JZ_REG_RTC_SEC 0x04
#define JZ_REG_RTC_SEC_ALARM 0x08
#define JZ_REG_REGULATOR 0x0C
#define JZ_RTC_CTRL_WRDY BIT(7)
#define JZ_RTC_CTRL_1HZ BIT(6)
#define JZ_RTC_CTRL_1HZ_IRQ BIT(5)
#define JZ_RTC_CTRL_AF BIT(4)
#define JZ_RTC_CTRL_AF_IRQ BIT(3)
#define JZ_RTC_CTRL_AE BIT(2)
#define JZ_RTC_CTRL_ENABLE BIT(0)
struct jz4740_rtc {
struct resource *mem;
void __iomem *base;
struct rtc_device *rtc;
unsigned int irq;
spinlock_t lock;
};
static inline uint32_t jz4740_rtc_reg_read(struct jz4740_rtc *rtc, size_t reg)
{
return readl(rtc->base + reg);
}
static inline void jz4740_rtc_wait_write_ready(struct jz4740_rtc *rtc)
{
uint32_t ctrl;
do {
ctrl = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL);
} while (!(ctrl & JZ_RTC_CTRL_WRDY));
}
static inline void jz4740_rtc_reg_write(struct jz4740_rtc *rtc, size_t reg,
uint32_t val)
{
jz4740_rtc_wait_write_ready(rtc);
writel(val, rtc->base + reg);
}
static void jz4740_rtc_ctrl_set_bits(struct jz4740_rtc *rtc, uint32_t mask,
uint32_t val)
{
unsigned long flags;
uint32_t ctrl;
spin_lock_irqsave(&rtc->lock, flags);
ctrl = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL);
/* Don't clear interrupt flags by accident */
ctrl |= JZ_RTC_CTRL_1HZ | JZ_RTC_CTRL_AF;
ctrl &= ~mask;
ctrl |= val;
jz4740_rtc_reg_write(rtc, JZ_REG_RTC_CTRL, ctrl);
spin_unlock_irqrestore(&rtc->lock, flags);
}
static inline struct jz4740_rtc *dev_to_rtc(struct device *dev)
{
return dev_get_drvdata(dev);
}
static int jz4740_rtc_read_time(struct device *dev, struct rtc_time *time)
{
struct jz4740_rtc *rtc = dev_to_rtc(dev);
uint32_t secs, secs2;
secs = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SEC);
secs2 = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SEC);
while (secs != secs2) {
secs = secs2;
secs2 = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SEC);
}
rtc_time_to_tm(secs, time);
return rtc_valid_tm(time);
}
static int jz4740_rtc_set_mmss(struct device *dev, unsigned long secs)
{
struct jz4740_rtc *rtc = dev_to_rtc(dev);
if ((uint32_t)secs != secs)
return -EINVAL;
jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SEC, secs);
return 0;
}
static int jz4740_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct jz4740_rtc *rtc = dev_to_rtc(dev);
uint32_t secs, secs2;
uint32_t ctrl;
secs = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SEC_ALARM);
secs2 = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SEC_ALARM);
while (secs != secs2){
secs = secs2;
secs2 = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SEC_ALARM);
}
ctrl = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL);
alrm->enabled = !!(ctrl & JZ_RTC_CTRL_AE);
alrm->pending = !!(ctrl & JZ_RTC_CTRL_AF);
rtc_time_to_tm(secs, &alrm->time);
return rtc_valid_tm(&alrm->time);
}
static int jz4740_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct jz4740_rtc *rtc = dev_to_rtc(dev);
unsigned long secs;
rtc_tm_to_time(&alrm->time, &secs);
if ((uint32_t)secs != secs)
return -EINVAL;
jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SEC_ALARM, (uint32_t)secs);
jz4740_rtc_ctrl_set_bits(rtc, JZ_RTC_CTRL_AE,
alrm->enabled ? JZ_RTC_CTRL_AE : 0);
return 0;
}
static int jz4740_rtc_update_irq_enable(struct device *dev, unsigned int enabled)
{
struct jz4740_rtc *rtc = dev_to_rtc(dev);
jz4740_rtc_ctrl_set_bits(rtc, JZ_RTC_CTRL_1HZ_IRQ,
enabled ? JZ_RTC_CTRL_1HZ_IRQ : 0);
return 0;
}
static int jz4740_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct jz4740_rtc *rtc = dev_to_rtc(dev);
jz4740_rtc_ctrl_set_bits(rtc, JZ_RTC_CTRL_AF_IRQ,
enabled ? JZ_RTC_CTRL_AF_IRQ : 0);
return 0;
}
static struct rtc_class_ops jz4740_rtc_ops = {
.read_time = jz4740_rtc_read_time,
.set_mmss = jz4740_rtc_set_mmss,
.read_alarm = jz4740_rtc_read_alarm,
.set_alarm = jz4740_rtc_set_alarm,
.update_irq_enable = jz4740_rtc_update_irq_enable,
.alarm_irq_enable = jz4740_rtc_alarm_irq_enable,
};
static irqreturn_t jz4740_rtc_irq(int irq, void *data)
{
struct jz4740_rtc *rtc = data;
uint32_t ctrl;
unsigned long events = 0;
ctrl = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL);
if (ctrl & JZ_RTC_CTRL_1HZ)
events |= (RTC_UF | RTC_IRQF);
if (ctrl & JZ_RTC_CTRL_AF)
events |= (RTC_AF | RTC_IRQF);
rtc_update_irq(rtc->rtc, 1, events);
jz4740_rtc_ctrl_set_bits(rtc, JZ_RTC_CTRL_1HZ | JZ_RTC_CTRL_AF, 0);
return IRQ_HANDLED;
}
static int __devinit jz4740_rtc_probe(struct platform_device *pdev)
{
int ret;
struct jz4740_rtc *rtc;
rtc = kmalloc(sizeof(*rtc), GFP_KERNEL);
rtc->irq = platform_get_irq(pdev, 0);
if (rtc->irq < 0) {
ret = -ENOENT;
dev_err(&pdev->dev, "Failed to get platform irq\n");
goto err_free;
}
rtc->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!rtc->mem) {
ret = -ENOENT;
dev_err(&pdev->dev, "Failed to get platform mmio memory\n");
goto err_free;
}
rtc->mem = request_mem_region(rtc->mem->start, resource_size(rtc->mem),
pdev->name);
if (!rtc->mem) {
ret = -EBUSY;
dev_err(&pdev->dev, "Failed to request mmio memory region\n");
goto err_free;
}
rtc->base = ioremap_nocache(rtc->mem->start, resource_size(rtc->mem));
if (!rtc->base) {
ret = -EBUSY;
dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
goto err_release_mem_region;
}
platform_set_drvdata(pdev, rtc);
rtc->rtc = rtc_device_register(pdev->name, &pdev->dev, &jz4740_rtc_ops,
THIS_MODULE);
if (IS_ERR(rtc->rtc)) {
ret = PTR_ERR(rtc->rtc);
dev_err(&pdev->dev, "Failed to register rtc device: %d\n", ret);
goto err_iounmap;
}
ret = request_irq(rtc->irq, jz4740_rtc_irq, 0,
pdev->name, rtc);
if (ret) {
dev_err(&pdev->dev, "Failed to request rtc irq: %d\n", ret);
goto err_unregister_rtc;
}
printk("rtc-ctrl: %d\n", jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL));
return 0;
err_unregister_rtc:
rtc_device_unregister(rtc->rtc);
err_iounmap:
platform_set_drvdata(pdev, NULL);
iounmap(rtc->base);
err_release_mem_region:
release_mem_region(rtc->mem->start, resource_size(rtc->mem));
err_free:
kfree(rtc);
return ret;
}
static int __devexit jz4740_rtc_remove(struct platform_device *pdev)
{
struct jz4740_rtc *rtc = platform_get_drvdata(pdev);
rtc_device_unregister(rtc->rtc);
iounmap(rtc->base);
release_mem_region(rtc->mem->start, resource_size(rtc->mem));
kfree(rtc);
platform_set_drvdata(pdev, NULL);
return 0;
}
struct platform_driver jz4740_rtc_driver = {
.probe = jz4740_rtc_probe,
.remove = __devexit_p(jz4740_rtc_remove),
.driver = {
.name = "jz4740-rtc",
.owner = THIS_MODULE,
},
};
static int __init jz4740_rtc_init(void)
{
return platform_driver_register(&jz4740_rtc_driver);
}
module_init(jz4740_rtc_init);
static void __exit jz4740_rtc_exit(void)
{
platform_driver_unregister(&jz4740_rtc_driver);
}
module_exit(jz4740_rtc_exit);
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("RTC driver for the JZ4720/JZ4740 SoC\n");
MODULE_ALIAS("platform:jz4740-rtc");
MODULE_ALIAS("platform:jz4720-rtc");

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@ -0,0 +1,30 @@
--- a/drivers/rtc/Kconfig 2009-09-02 16:48:11.000000000 +0200
+++ b/drivers/rtc//Kconfig 2009-09-20 03:21:58.000000000 +0200
@@ -460,6 +460,17 @@
This driver can also be built as a module. If so, the module
will be called rtc-efi.
+config RTC_DRV_JZ4740
+ tristate "Ingenic JZ4720/JZ4740 SoC"
+ depends on RTC_CLASS
+ depends on SOC_JZ4740
+ help
+ If you say yes here you get support for the
+ Ingenic JZ4720/JZ4740 SoC RTC controller.
+
+ This driver can also be buillt as a module. If so, the module
+ will be called rtc-jz4740.
+
config RTC_DRV_STK17TA8
tristate "Simtek STK17TA8"
depends on RTC_CLASS
--- a/drivers/rtc/Makefile 2009-09-02 16:48:11.000000000 +0200
+++ b/drivers/rtc/Makefile 2009-09-20 03:16:44.000000000 +0200
@@ -40,6 +40,7 @@
obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o
obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o
obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o
+obj-$(CONFIG_RTC_DRV_JZ4740) += rtc-jz4740.o
obj-$(CONFIG_RTC_DRV_M41T80) += rtc-m41t80.o
obj-$(CONFIG_RTC_DRV_M41T94) += rtc-m41t94.o
obj-$(CONFIG_RTC_DRV_M48T35) += rtc-m48t35.o