New RTC platform driver for Epson RTC7301. Fix chip select timing for RTC7301 access.

SVN-Revision: 14109

diff --git a/target/linux/generic-2.6/patches-2.6.28/700-rtc7301.patch b/target/linux/generic-2.6/patches-2.6.28/700-rtc7301.patch
new file mode 100644 (file)
index 0000000..9638ba7
--- /dev/null
+++ b/target/linux/generic-2.6/patches-2.6.28/700-rtc7301.patch
@@ -0,0 +1,250 @@
+--- a/drivers/rtc/Kconfig      2009-01-18 19:04:38.000000000 -0500
++++ b/drivers/rtc/Kconfig      2009-01-18 19:08:35.000000000 -0500
+@@ -497,6 +497,15 @@
+         This driver can also be built as a module. If so, the module
+         will be called "rtc-wm8350".
+ 
++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_OMAP
+--- a/drivers/rtc/Makefile     2009-01-18 19:04:47.000000000 -0500
++++ b/drivers/rtc/Makefile     2009-01-18 19:08:31.000000000 -0500
+@@ -58,6 +58,7 @@
+ 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-$(CONFIG_RTC_DRV_RX8581)  += rtc-rx8581.o
+ obj-$(CONFIG_RTC_DRV_S35390A) += rtc-s35390a.o
+ obj-$(CONFIG_RTC_DRV_S3C)     += rtc-s3c.o
+--- /dev/null  2008-11-10 20:11:01.000000000 -0500
++++ b/drivers/rtc/rtc-rtc7301.c        2009-01-18 18:54:06.000000000 -0500
+@@ -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);

diff --git a/target/linux/ixp4xx/patches-2.6.28/500-usr8200_support.patch b/target/linux/ixp4xx/patches-2.6.28/500-usr8200_support.patch
index 6c23e6b3a8f9d2ac0db16187b6e04a3faf110866..d0175044db480475e37c8d5e8a80be4c1eb7ec78 100644 (file)
--- a/target/linux/ixp4xx/patches-2.6.28/500-usr8200_support.patch
+++ b/target/linux/ixp4xx/patches-2.6.28/500-usr8200_support.patch
@@ -309,7 +309,7 @@
 +      usr8200_rtc_resources.end = IXP4XX_EXP_BUS_BASE(2) + 0x01ff;
 +
 +      *IXP4XX_EXP_CS0 |= IXP4XX_FLASH_WRITABLE;
-+      *IXP4XX_EXP_CS2 = IXP4XX_EXP_BUS_SIZE(0) | IXP4XX_EXP_BUS_WR_EN |
++      *IXP4XX_EXP_CS2 = 0x3fff000 | IXP4XX_EXP_BUS_SIZE(0) | IXP4XX_EXP_BUS_WR_EN |
 +                        IXP4XX_EXP_BUS_CS_EN | IXP4XX_EXP_BUS_BYTE_EN;
 +      *IXP4XX_GPIO_GPCLKR = 0x01100000;
 +