mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-05 10:01:32 +02:00
b2cab73a78
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26691 3c298f89-4303-0410-b956-a3cf2f4a3e73
251 lines
6.3 KiB
Diff
251 lines
6.3 KiB
Diff
--- a/drivers/rtc/Kconfig
|
|
+++ b/drivers/rtc/Kconfig
|
|
@@ -677,6 +677,15 @@ config RTC_DRV_NUC900
|
|
If you say yes here you get support for the RTC subsystem of the
|
|
NUC910/NUC920 used in embedded systems.
|
|
|
|
+config RTC_DRV_RTC7301
|
|
+ tristate "Epson RTC-7301 SF/DG"
|
|
+ help
|
|
+ If you say Y here you will get support for the
|
|
+ Epson RTC-7301 SF/DG RTC chips.
|
|
+
|
|
+ This driver can also be built as a module. If so, the module
|
|
+ will be called rtc-7301.
|
|
+
|
|
comment "on-CPU RTC drivers"
|
|
|
|
config RTC_DRV_DAVINCI
|
|
--- a/drivers/rtc/Makefile
|
|
+++ b/drivers/rtc/Makefile
|
|
@@ -81,6 +81,7 @@ obj-$(CONFIG_RTC_DRV_RP5C01) += rtc-rp5c
|
|
obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o
|
|
obj-$(CONFIG_RTC_DRV_RS5C348) += rtc-rs5c348.o
|
|
obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o
|
|
+obj-$(CONFIG_RTC_DRV_RTC7301) += rtc-rtc7301.o
|
|
obj-$(CONFIG_RTC_DRV_RX8025) += rtc-rx8025.o
|
|
obj-$(CONFIG_RTC_DRV_RX8581) += rtc-rx8581.o
|
|
obj-$(CONFIG_RTC_DRV_S35390A) += rtc-s35390a.o
|
|
--- /dev/null
|
|
+++ b/drivers/rtc/rtc-rtc7301.c
|
|
@@ -0,0 +1,219 @@
|
|
+/*
|
|
+ * Driver for Epson RTC-7301SF/DG
|
|
+ *
|
|
+ * Copyright (C) 2009 Jose Vasconcellos
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify
|
|
+ * it under the terms of the GNU General Public License version 2 as
|
|
+ * published by the Free Software Foundation.
|
|
+ */
|
|
+
|
|
+#include <linux/module.h>
|
|
+#include <linux/rtc.h>
|
|
+#include <linux/platform_device.h>
|
|
+#include <linux/io.h>
|
|
+#include <linux/delay.h>
|
|
+#include <linux/bcd.h>
|
|
+
|
|
+#define RTC_NAME "rtc7301"
|
|
+#define RTC_VERSION "0.1"
|
|
+
|
|
+/* Epson RTC-7301 register addresses */
|
|
+#define RTC7301_SEC 0x00
|
|
+#define RTC7301_SEC10 0x01
|
|
+#define RTC7301_MIN 0x02
|
|
+#define RTC7301_MIN10 0x03
|
|
+#define RTC7301_HOUR 0x04
|
|
+#define RTC7301_HOUR10 0x05
|
|
+#define RTC7301_WEEKDAY 0x06
|
|
+#define RTC7301_DAY 0x07
|
|
+#define RTC7301_DAY10 0x08
|
|
+#define RTC7301_MON 0x09
|
|
+#define RTC7301_MON10 0x0A
|
|
+#define RTC7301_YEAR 0x0B
|
|
+#define RTC7301_YEAR10 0x0C
|
|
+#define RTC7301_YEAR100 0x0D
|
|
+#define RTC7301_YEAR1000 0x0E
|
|
+#define RTC7301_CTRLREG 0x0F
|
|
+
|
|
+static uint8_t __iomem *rtc7301_base;
|
|
+
|
|
+#define read_reg(offset) (readb(rtc7301_base + offset) & 0xf)
|
|
+#define write_reg(offset, data) writeb(data, rtc7301_base + (offset))
|
|
+
|
|
+#define rtc7301_isbusy() (read_reg(RTC7301_CTRLREG) & 1)
|
|
+
|
|
+static void rtc7301_init_settings(void)
|
|
+{
|
|
+ int i;
|
|
+
|
|
+ write_reg(RTC7301_CTRLREG, 2);
|
|
+ write_reg(RTC7301_YEAR1000, 2);
|
|
+ udelay(122);
|
|
+
|
|
+ /* bank 1 */
|
|
+ write_reg(RTC7301_CTRLREG, 6);
|
|
+ for (i=0; i<15; i++)
|
|
+ write_reg(i, 0);
|
|
+
|
|
+ /* bank 2 */
|
|
+ write_reg(RTC7301_CTRLREG, 14);
|
|
+ for (i=0; i<15; i++)
|
|
+ write_reg(i, 0);
|
|
+ write_reg(RTC7301_CTRLREG, 0);
|
|
+}
|
|
+
|
|
+static int rtc7301_get_datetime(struct device *dev, struct rtc_time *dt)
|
|
+{
|
|
+ int cnt;
|
|
+ uint8_t buf[16];
|
|
+
|
|
+ cnt = 0;
|
|
+ while (rtc7301_isbusy()) {
|
|
+ udelay(244);
|
|
+ if (cnt++ > 100) {
|
|
+ dev_err(dev, "%s: timeout error %x\n", __func__, rtc7301_base[RTC7301_CTRLREG]);
|
|
+ return -EIO;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ for (cnt=0; cnt<16; cnt++)
|
|
+ buf[cnt] = read_reg(cnt);
|
|
+
|
|
+ if (buf[RTC7301_SEC10] & 8) {
|
|
+ dev_err(dev, "%s: RTC not set\n", __func__);
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ memset(dt, 0, sizeof(*dt));
|
|
+
|
|
+ dt->tm_sec = buf[RTC7301_SEC] + buf[RTC7301_SEC10]*10;
|
|
+ dt->tm_min = buf[RTC7301_MIN] + buf[RTC7301_MIN10]*10;
|
|
+ dt->tm_hour = buf[RTC7301_HOUR] + buf[RTC7301_HOUR10]*10;
|
|
+
|
|
+ dt->tm_mday = buf[RTC7301_DAY] + buf[RTC7301_DAY10]*10;
|
|
+ dt->tm_mon = buf[RTC7301_MON] + buf[RTC7301_MON10]*10 - 1;
|
|
+ dt->tm_year = buf[RTC7301_YEAR] + buf[RTC7301_YEAR10]*10 +
|
|
+ buf[RTC7301_YEAR100]*100 +
|
|
+ ((buf[RTC7301_YEAR1000] & 3)*1000) - 1900;
|
|
+
|
|
+ /* the rtc device may contain illegal values on power up
|
|
+ * according to the data sheet. make sure they are valid.
|
|
+ */
|
|
+
|
|
+ return rtc_valid_tm(dt);
|
|
+}
|
|
+
|
|
+static int rtc7301_set_datetime(struct device *dev, struct rtc_time *dt)
|
|
+{
|
|
+ int data;
|
|
+
|
|
+ data = dt->tm_year + 1900;
|
|
+ if (data >= 2100 || data < 1900)
|
|
+ return -EINVAL;
|
|
+
|
|
+ write_reg(RTC7301_CTRLREG, 2);
|
|
+ udelay(122);
|
|
+
|
|
+ data = bin2bcd(dt->tm_sec);
|
|
+ write_reg(RTC7301_SEC, data);
|
|
+ write_reg(RTC7301_SEC10, (data >> 4));
|
|
+
|
|
+ data = bin2bcd(dt->tm_min);
|
|
+ write_reg(RTC7301_MIN, data );
|
|
+ write_reg(RTC7301_MIN10, (data >> 4));
|
|
+
|
|
+ data = bin2bcd(dt->tm_hour);
|
|
+ write_reg(RTC7301_HOUR, data);
|
|
+ write_reg(RTC7301_HOUR10, (data >> 4));
|
|
+
|
|
+ data = bin2bcd(dt->tm_mday);
|
|
+ write_reg(RTC7301_DAY, data);
|
|
+ write_reg(RTC7301_DAY10, (data>> 4));
|
|
+
|
|
+ data = bin2bcd(dt->tm_mon + 1);
|
|
+ write_reg(RTC7301_MON, data);
|
|
+ write_reg(RTC7301_MON10, (data >> 4));
|
|
+
|
|
+ data = bin2bcd(dt->tm_year % 100);
|
|
+ write_reg(RTC7301_YEAR, data);
|
|
+ write_reg(RTC7301_YEAR10, (data >> 4));
|
|
+ data = bin2bcd((1900 + dt->tm_year) / 100);
|
|
+ write_reg(RTC7301_YEAR100, data);
|
|
+
|
|
+ data = bin2bcd(dt->tm_wday);
|
|
+ write_reg(RTC7301_WEEKDAY, data);
|
|
+
|
|
+ write_reg(RTC7301_CTRLREG, 0);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static const struct rtc_class_ops rtc7301_rtc_ops = {
|
|
+ .read_time = rtc7301_get_datetime,
|
|
+ .set_time = rtc7301_set_datetime,
|
|
+};
|
|
+
|
|
+static int __devinit rtc7301_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct rtc_device *rtc;
|
|
+ struct resource *res;
|
|
+
|
|
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
+ if (!res)
|
|
+ return -ENOENT;
|
|
+
|
|
+ rtc7301_base = ioremap_nocache(res->start, 0x1000 /*res->end - res->start + 1*/);
|
|
+ if (!rtc7301_base)
|
|
+ return -EINVAL;
|
|
+
|
|
+ rtc = rtc_device_register(RTC_NAME, &pdev->dev,
|
|
+ &rtc7301_rtc_ops, THIS_MODULE);
|
|
+ if (IS_ERR(rtc)) {
|
|
+ iounmap(rtc7301_base);
|
|
+ return PTR_ERR(rtc);
|
|
+ }
|
|
+
|
|
+ platform_set_drvdata(pdev, rtc);
|
|
+
|
|
+ rtc7301_init_settings();
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int __devexit rtc7301_remove(struct platform_device *pdev)
|
|
+{
|
|
+ struct rtc_device *rtc = platform_get_drvdata(pdev);
|
|
+
|
|
+ if (rtc)
|
|
+ rtc_device_unregister(rtc);
|
|
+ if (rtc7301_base)
|
|
+ iounmap(rtc7301_base);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static struct platform_driver rtc7301_driver = {
|
|
+ .driver = {
|
|
+ .name = RTC_NAME,
|
|
+ .owner = THIS_MODULE,
|
|
+ },
|
|
+ .probe = rtc7301_probe,
|
|
+ .remove = __devexit_p(rtc7301_remove),
|
|
+};
|
|
+
|
|
+static __init int rtc7301_init(void)
|
|
+{
|
|
+ return platform_driver_register(&rtc7301_driver);
|
|
+}
|
|
+module_init(rtc7301_init);
|
|
+
|
|
+static __exit void rtc7301_exit(void)
|
|
+{
|
|
+ platform_driver_unregister(&rtc7301_driver);
|
|
+}
|
|
+module_exit(rtc7301_exit);
|
|
+
|
|
+MODULE_DESCRIPTION("Epson 7301 RTC driver");
|
|
+MODULE_AUTHOR("Jose Vasconcellos <jvasco@verizon.net>");
|
|
+MODULE_LICENSE("GPL");
|
|
+MODULE_ALIAS("platform:" RTC_NAME);
|
|
+MODULE_VERSION(RTC_VERSION);
|