#include <linux/module.h>
#include <linux/rtc.h>
#include <linux/platform_device.h>
-#include <asm/hardware.h>
+#include <linux/io.h>
+
+#define EP93XX_RTC_DATA 0x000
+#define EP93XX_RTC_MATCH 0x004
+#define EP93XX_RTC_STATUS 0x008
+#define EP93XX_RTC_STATUS_INTR (1<<0)
+#define EP93XX_RTC_LOAD 0x00C
+#define EP93XX_RTC_CONTROL 0x010
+#define EP93XX_RTC_CONTROL_MIE (1<<0)
+#define EP93XX_RTC_SWCOMP 0x108
+#define EP93XX_RTC_SWCOMP_DEL_MASK 0x001f0000
+#define EP93XX_RTC_SWCOMP_DEL_SHIFT 16
+#define EP93XX_RTC_SWCOMP_INT_MASK 0x0000ffff
+#define EP93XX_RTC_SWCOMP_INT_SHIFT 0
+
+#define DRV_VERSION "0.3"
-#define EP93XX_RTC_REG(x) (EP93XX_RTC_BASE + (x))
-#define EP93XX_RTC_DATA EP93XX_RTC_REG(0x0000)
-#define EP93XX_RTC_LOAD EP93XX_RTC_REG(0x000C)
-#define EP93XX_RTC_SWCOMP EP93XX_RTC_REG(0x0108)
-
-#define DRV_VERSION "0.2"
+/*
+ * struct device dev.platform_data is used to store our private data
+ * because struct rtc_device does not have a variable to hold it.
+ */
+struct ep93xx_rtc {
+ void __iomem *mmio_base;
+};
-static int ep93xx_get_swcomp(struct device *dev, unsigned short *preload,
+static int ep93xx_rtc_get_swcomp(struct device *dev, unsigned short *preload,
unsigned short *delete)
{
- unsigned short comp = __raw_readl(EP93XX_RTC_SWCOMP);
+ struct ep93xx_rtc *ep93xx_rtc = dev->platform_data;
+ unsigned long comp;
+
+ comp = __raw_readl(ep93xx_rtc->mmio_base + EP93XX_RTC_SWCOMP);
if (preload)
- *preload = comp & 0xffff;
+ *preload = (comp & EP93XX_RTC_SWCOMP_INT_MASK)
+ >> EP93XX_RTC_SWCOMP_INT_SHIFT;
if (delete)
- *delete = (comp >> 16) & 0x1f;
+ *delete = (comp & EP93XX_RTC_SWCOMP_DEL_MASK)
+ >> EP93XX_RTC_SWCOMP_DEL_SHIFT;
return 0;
}
static int ep93xx_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
- unsigned long time = __raw_readl(EP93XX_RTC_DATA);
+ struct ep93xx_rtc *ep93xx_rtc = dev->platform_data;
+ unsigned long time;
+
+ time = __raw_readl(ep93xx_rtc->mmio_base + EP93XX_RTC_DATA);
rtc_time_to_tm(time, tm);
return 0;
static int ep93xx_rtc_set_mmss(struct device *dev, unsigned long secs)
{
- __raw_writel(secs + 1, EP93XX_RTC_LOAD);
- return 0;
-}
+ struct ep93xx_rtc *ep93xx_rtc = dev->platform_data;
-static int ep93xx_rtc_set_time(struct device *dev, struct rtc_time *tm)
-{
- int err;
- unsigned long secs;
-
- err = rtc_tm_to_time(tm, &secs);
- if (err != 0)
- return err;
-
- return ep93xx_rtc_set_mmss(dev, secs);
+ __raw_writel(secs + 1, ep93xx_rtc->mmio_base + EP93XX_RTC_LOAD);
+ return 0;
}
static int ep93xx_rtc_proc(struct device *dev, struct seq_file *seq)
{
unsigned short preload, delete;
- ep93xx_get_swcomp(dev, &preload, &delete);
+ ep93xx_rtc_get_swcomp(dev, &preload, &delete);
- seq_printf(seq, "24hr\t\t: yes\n");
seq_printf(seq, "preload\t\t: %d\n", preload);
seq_printf(seq, "delete\t\t: %d\n", delete);
return 0;
}
-static struct rtc_class_ops ep93xx_rtc_ops = {
+static const struct rtc_class_ops ep93xx_rtc_ops = {
.read_time = ep93xx_rtc_read_time,
- .set_time = ep93xx_rtc_set_time,
.set_mmss = ep93xx_rtc_set_mmss,
.proc = ep93xx_rtc_proc,
};
-static ssize_t ep93xx_sysfs_show_comp_preload(struct device *dev,
+static ssize_t ep93xx_rtc_show_comp_preload(struct device *dev,
struct device_attribute *attr, char *buf)
{
unsigned short preload;
- ep93xx_get_swcomp(dev, &preload, NULL);
+ ep93xx_rtc_get_swcomp(dev, &preload, NULL);
return sprintf(buf, "%d\n", preload);
}
-static DEVICE_ATTR(comp_preload, S_IRUGO, ep93xx_sysfs_show_comp_preload, NULL);
+static DEVICE_ATTR(comp_preload, S_IRUGO, ep93xx_rtc_show_comp_preload, NULL);
-static ssize_t ep93xx_sysfs_show_comp_delete(struct device *dev,
+static ssize_t ep93xx_rtc_show_comp_delete(struct device *dev,
struct device_attribute *attr, char *buf)
{
unsigned short delete;
- ep93xx_get_swcomp(dev, NULL, &delete);
+ ep93xx_rtc_get_swcomp(dev, NULL, &delete);
return sprintf(buf, "%d\n", delete);
}
-static DEVICE_ATTR(comp_delete, S_IRUGO, ep93xx_sysfs_show_comp_delete, NULL);
+static DEVICE_ATTR(comp_delete, S_IRUGO, ep93xx_rtc_show_comp_delete, NULL);
-static int __devinit ep93xx_rtc_probe(struct platform_device *dev)
+static int __init ep93xx_rtc_probe(struct platform_device *pdev)
{
- struct rtc_device *rtc = rtc_device_register("ep93xx",
- &dev->dev, &ep93xx_rtc_ops, THIS_MODULE);
+ struct ep93xx_rtc *ep93xx_rtc;
+ struct resource *res;
+ struct rtc_device *rtc;
+ int err;
+
+ ep93xx_rtc = kzalloc(sizeof(struct ep93xx_rtc), GFP_KERNEL);
+ if (ep93xx_rtc == NULL)
+ return -ENOMEM;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ err = -ENXIO;
+ goto fail_free;
+ }
+
+ res = request_mem_region(res->start, resource_size(res), pdev->name);
+ if (res == NULL) {
+ err = -EBUSY;
+ goto fail_free;
+ }
+
+ ep93xx_rtc->mmio_base = ioremap(res->start, resource_size(res));
+ if (ep93xx_rtc->mmio_base == NULL) {
+ err = -ENXIO;
+ goto fail;
+ }
+
+ pdev->dev.platform_data = ep93xx_rtc;
+
+ rtc = rtc_device_register(pdev->name,
+ &pdev->dev, &ep93xx_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc)) {
- dev_err(&dev->dev, "unable to register\n");
- return PTR_ERR(rtc);
+ err = PTR_ERR(rtc);
+ goto fail;
}
- platform_set_drvdata(dev, rtc);
+ platform_set_drvdata(pdev, rtc);
- device_create_file(&dev->dev, &dev_attr_comp_preload);
- device_create_file(&dev->dev, &dev_attr_comp_delete);
+ err = device_create_file(&pdev->dev, &dev_attr_comp_preload);
+ if (err)
+ goto fail;
+ err = device_create_file(&pdev->dev, &dev_attr_comp_delete);
+ if (err) {
+ device_remove_file(&pdev->dev, &dev_attr_comp_preload);
+ goto fail;
+ }
return 0;
+
+fail:
+ if (ep93xx_rtc->mmio_base) {
+ iounmap(ep93xx_rtc->mmio_base);
+ pdev->dev.platform_data = NULL;
+ }
+ release_mem_region(res->start, resource_size(res));
+fail_free:
+ kfree(ep93xx_rtc);
+ return err;
}
-static int __devexit ep93xx_rtc_remove(struct platform_device *dev)
+static int __exit ep93xx_rtc_remove(struct platform_device *pdev)
{
- struct rtc_device *rtc = platform_get_drvdata(dev);
+ struct rtc_device *rtc = platform_get_drvdata(pdev);
+ struct ep93xx_rtc *ep93xx_rtc = pdev->dev.platform_data;
+ struct resource *res;
+
+ /* cleanup sysfs */
+ device_remove_file(&pdev->dev, &dev_attr_comp_delete);
+ device_remove_file(&pdev->dev, &dev_attr_comp_preload);
- if (rtc)
- rtc_device_unregister(rtc);
+ rtc_device_unregister(rtc);
- platform_set_drvdata(dev, NULL);
+ iounmap(ep93xx_rtc->mmio_base);
+ pdev->dev.platform_data = NULL;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(res->start, resource_size(res));
+
+ platform_set_drvdata(pdev, NULL);
return 0;
}
-static struct platform_driver ep93xx_rtc_platform_driver = {
+/* work with hotplug and coldplug */
+MODULE_ALIAS("platform:ep93xx-rtc");
+
+static struct platform_driver ep93xx_rtc_driver = {
.driver = {
.name = "ep93xx-rtc",
.owner = THIS_MODULE,
},
- .probe = ep93xx_rtc_probe,
- .remove = __devexit_p(ep93xx_rtc_remove),
+ .remove = __exit_p(ep93xx_rtc_remove),
};
static int __init ep93xx_rtc_init(void)
{
- return platform_driver_register(&ep93xx_rtc_platform_driver);
+ return platform_driver_probe(&ep93xx_rtc_driver, ep93xx_rtc_probe);
}
static void __exit ep93xx_rtc_exit(void)
{
- platform_driver_unregister(&ep93xx_rtc_platform_driver);
+ platform_driver_unregister(&ep93xx_rtc_driver);
}
MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff