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path: root/target/linux/xburst/files-2.6.32/drivers/rtc/rtc-jz4740.c
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Diffstat (limited to 'target/linux/xburst/files-2.6.32/drivers/rtc/rtc-jz4740.c')
-rw-r--r--target/linux/xburst/files-2.6.32/drivers/rtc/rtc-jz4740.c333
1 files changed, 0 insertions, 333 deletions
diff --git a/target/linux/xburst/files-2.6.32/drivers/rtc/rtc-jz4740.c b/target/linux/xburst/files-2.6.32/drivers/rtc/rtc-jz4740.c
deleted file mode 100644
index 03479a73f7..0000000000
--- a/target/linux/xburst/files-2.6.32/drivers/rtc/rtc-jz4740.c
+++ /dev/null
@@ -1,333 +0,0 @@
-/*
- * 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_RTC_REGULATOR 0x0C
-#define JZ_REG_RTC_SCRATCHPAD 0x34
-
-#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;
- uint32_t scratchpad;
-
- 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;
- }
-
- scratchpad = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SCRATCHPAD);
- if (scratchpad != 0x12345678) {
- jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SCRATCHPAD, 0x12345678);
- jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SEC, 0);
- }
-
- 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);
-
- free_irq(rtc->irq, rtc);
-
- 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");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-23 18:30:41 +0000