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Diffstat (limited to 'target/linux/cns21xx/patches-3.8/006-arm-add-fa-watchdog-driver.patch')
-rw-r--r--target/linux/cns21xx/patches-3.8/006-arm-add-fa-watchdog-driver.patch458
1 files changed, 0 insertions, 458 deletions
diff --git a/target/linux/cns21xx/patches-3.8/006-arm-add-fa-watchdog-driver.patch b/target/linux/cns21xx/patches-3.8/006-arm-add-fa-watchdog-driver.patch
deleted file mode 100644
index 2c67b16..0000000
--- a/target/linux/cns21xx/patches-3.8/006-arm-add-fa-watchdog-driver.patch
+++ /dev/null
@@ -1,458 +0,0 @@
---- a/drivers/watchdog/Kconfig
-+++ b/drivers/watchdog/Kconfig
-@@ -365,6 +365,13 @@ config IMX2_WDT
- To compile this driver as a module, choose M here: the
- module will be called imx2_wdt.
-
-+config FA_WATCHDOG
-+ tristate "Faraday watchdog"
-+ depends on ARCH_GEMINI
-+ help
-+ Say Y here if you want support for the built-in watchdog timer
-+ found in some Faraday FA526 based SoCs.
-+
- # AVR32 Architecture
-
- config AT32AP700X_WDT
---- a/drivers/watchdog/Makefile
-+++ b/drivers/watchdog/Makefile
-@@ -52,6 +52,7 @@ obj-$(CONFIG_STMP3XXX_WATCHDOG) += stmp3
- obj-$(CONFIG_NUC900_WATCHDOG) += nuc900_wdt.o
- obj-$(CONFIG_TS72XX_WATCHDOG) += ts72xx_wdt.o
- obj-$(CONFIG_IMX2_WDT) += imx2_wdt.o
-+obj-$(CONFIG_FA_WATCHDOG) += fa_wdt.o
-
- # AVR32 Architecture
- obj-$(CONFIG_AT32AP700X_WDT) += at32ap700x_wdt.o
---- /dev/null
-+++ b/drivers/watchdog/fa_wdt.c
-@@ -0,0 +1,413 @@
-+/*
-+ * Watchdog driver for SoCs based on the Faraday FA526 core
-+ *
-+ * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
-+ * Copyright (C) 2010-2012 Gabor Juhos <juhosg@openwrt.org>
-+ *
-+ * 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/kernel.h>
-+#include <linux/module.h>
-+#include <linux/init.h>
-+#include <linux/io.h>
-+#include <linux/fs.h>
-+#include <linux/notifier.h>
-+#include <linux/reboot.h>
-+#include <linux/uaccess.h>
-+#include <linux/miscdevice.h>
-+#include <linux/platform_device.h>
-+#include <linux/watchdog.h>
-+#include <linux/slab.h>
-+#include <linux/fa_wdt.h>
-+
-+#define FA_WDCOUNTER 0x0
-+#define FA_WDLOAD 0x4
-+#define FA_WDRESTART 0x8
-+
-+#define WDRESTART_MAGIC 0x5AB9
-+
-+#define FA_WDCR 0xC
-+
-+#define WDCR_CLOCK_5MHZ (1 << 4)
-+#define WDCR_SYS_RST (1 << 1)
-+#define WDCR_ENABLE (1 << 0)
-+
-+#define WDT_DEFAULT_TIMEOUT 13
-+
-+/* status bits */
-+#define WDT_ACTIVE 0
-+#define WDT_OK_TO_CLOSE 1
-+
-+static unsigned int timeout = WDT_DEFAULT_TIMEOUT;
-+static int nowayout = WATCHDOG_NOWAYOUT;
-+
-+static DEFINE_SPINLOCK(fa_wdt_lock);
-+
-+static struct platform_device *fa_wdt_dev;
-+
-+struct fa_wdt_struct {
-+ struct resource *res;
-+ struct device *dev;
-+ void __iomem *base;
-+ unsigned long status;
-+ unsigned int clock;
-+ unsigned int max_timeout;
-+};
-+
-+static const struct watchdog_info fa_wdt_info = {
-+ .identity = "Faraday watchdog",
-+ .options = WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING |
-+ WDIOF_SETTIMEOUT,
-+};
-+
-+/* Disable the watchdog. */
-+static void fa_wdt_stop(struct fa_wdt_struct *fa_wdt)
-+{
-+ spin_lock(&fa_wdt_lock);
-+
-+ __raw_writel(0, fa_wdt->base + FA_WDCR);
-+
-+ clear_bit(WDT_ACTIVE, &fa_wdt->status);
-+
-+ spin_unlock(&fa_wdt_lock);
-+}
-+
-+/* Service the watchdog */
-+static void fa_wdt_service(struct fa_wdt_struct *fa_wdt)
-+{
-+ __raw_writel(WDRESTART_MAGIC, fa_wdt->base + FA_WDRESTART);
-+}
-+
-+/* Enable and reset the watchdog. */
-+static void fa_wdt_start(struct fa_wdt_struct *fa_wdt)
-+{
-+ spin_lock(&fa_wdt_lock);
-+
-+ __raw_writel(timeout * fa_wdt->clock,
-+ fa_wdt->base + FA_WDLOAD);
-+
-+ fa_wdt_service(fa_wdt);
-+
-+ /* set clock before enabling */
-+ __raw_writel(WDCR_CLOCK_5MHZ | WDCR_SYS_RST,
-+ fa_wdt->base + FA_WDCR);
-+
-+ __raw_writel(WDCR_CLOCK_5MHZ | WDCR_SYS_RST | WDCR_ENABLE,
-+ fa_wdt->base + FA_WDCR);
-+
-+ set_bit(WDT_ACTIVE, &fa_wdt->status);
-+
-+ spin_unlock(&fa_wdt_lock);
-+}
-+
-+/* Watchdog device is opened, and watchdog starts running. */
-+static int fa_wdt_open(struct inode *inode, struct file *file)
-+{
-+ struct fa_wdt_struct *fa_wdt = platform_get_drvdata(fa_wdt_dev);
-+
-+ if (test_bit(WDT_ACTIVE, &fa_wdt->status))
-+ return -EBUSY;
-+
-+ file->private_data = fa_wdt;
-+
-+ fa_wdt_start(fa_wdt);
-+
-+ return nonseekable_open(inode, file);
-+}
-+
-+/* Close the watchdog device. */
-+static int fa_wdt_close(struct inode *inode, struct file *file)
-+{
-+ struct fa_wdt_struct *fa_wdt = file->private_data;
-+
-+ /* Disable the watchdog if possible */
-+ if (test_bit(WDT_OK_TO_CLOSE, &fa_wdt->status))
-+ fa_wdt_stop(fa_wdt);
-+ else
-+ dev_warn(fa_wdt->dev, "Device closed unexpectedly - timer will not stop\n");
-+
-+ return 0;
-+}
-+
-+/* Handle commands from user-space. */
-+static long fa_wdt_ioctl(struct file *file, unsigned int cmd,
-+ unsigned long arg)
-+{
-+ struct fa_wdt_struct *fa_wdt = file->private_data;
-+
-+ int value;
-+
-+ switch (cmd) {
-+ case WDIOC_KEEPALIVE:
-+ fa_wdt_service(fa_wdt);
-+ return 0;
-+
-+ case WDIOC_GETSUPPORT:
-+ return copy_to_user((struct watchdog_info *)arg, &fa_wdt_info,
-+ sizeof(fa_wdt_info)) ? -EFAULT : 0;
-+
-+ case WDIOC_SETTIMEOUT:
-+ if (get_user(value, (int *)arg))
-+ return -EFAULT;
-+
-+ if ((value < 1) || (value > fa_wdt->max_timeout))
-+ return -EINVAL;
-+
-+ timeout = value;
-+
-+ /* restart wdt to use new timeout */
-+ fa_wdt_stop(fa_wdt);
-+ fa_wdt_start(fa_wdt);
-+
-+ /* Fall through */
-+ case WDIOC_GETTIMEOUT:
-+ return put_user(timeout, (int *)arg);
-+
-+ case WDIOC_GETTIMELEFT:
-+ value = __raw_readl(fa_wdt->base + FA_WDCOUNTER);
-+ return put_user(value / fa_wdt->clock, (int *)arg);
-+
-+ default:
-+ return -ENOTTY;
-+ }
-+}
-+
-+/* Refresh the watchdog whenever device is written to. */
-+static ssize_t fa_wdt_write(struct file *file, const char *data,
-+ size_t len, loff_t *ppos)
-+{
-+ struct fa_wdt_struct *fa_wdt = file->private_data;
-+
-+ if (len) {
-+ if (!nowayout) {
-+ size_t i;
-+
-+ clear_bit(WDT_OK_TO_CLOSE, &fa_wdt->status);
-+ for (i = 0; i != len; i++) {
-+ char c;
-+
-+ if (get_user(c, data + i))
-+ return -EFAULT;
-+ if (c == 'V')
-+ set_bit(WDT_OK_TO_CLOSE,
-+ &fa_wdt->status);
-+ }
-+ }
-+ fa_wdt_service(fa_wdt);
-+ }
-+
-+ return len;
-+}
-+
-+static int fa_wdt_notify_sys(struct notifier_block *this,
-+ unsigned long code, void *unused)
-+{
-+ struct fa_wdt_struct *fa_wdt = platform_get_drvdata(fa_wdt_dev);
-+
-+ if (code == SYS_DOWN || code == SYS_HALT)
-+ fa_wdt_stop(fa_wdt);
-+
-+ return NOTIFY_DONE;
-+}
-+
-+static struct notifier_block fa_wdt_notifier = {
-+ .notifier_call = fa_wdt_notify_sys,
-+};
-+
-+static const struct file_operations fa_wdt_fops = {
-+ .owner = THIS_MODULE,
-+ .llseek = no_llseek,
-+ .unlocked_ioctl = fa_wdt_ioctl,
-+ .open = fa_wdt_open,
-+ .release = fa_wdt_close,
-+ .write = fa_wdt_write,
-+};
-+
-+static struct miscdevice fa_wdt_miscdev = {
-+ .minor = WATCHDOG_MINOR,
-+ .name = "watchdog",
-+ .fops = &fa_wdt_fops,
-+};
-+
-+static void fa_wdt_shutdown(struct platform_device *pdev)
-+{
-+ struct fa_wdt_struct *fa_wdt = platform_get_drvdata(pdev);
-+
-+ fa_wdt_stop(fa_wdt);
-+}
-+
-+static int fa_wdt_probe(struct platform_device *pdev)
-+{
-+ int ret;
-+ int res_size;
-+ struct resource *res;
-+ void __iomem *base;
-+ struct fa_wdt_struct *fa_wdt;
-+ struct fa_wdt_platform_data *pdata;
-+
-+ pdata = pdev->dev.platform_data;
-+ if (!pdata) {
-+ dev_err(&pdev->dev, "no platform data specified\n");
-+ return -EINVAL;
-+ }
-+
-+ if (!pdata->clock) {
-+ dev_err(&pdev->dev, "invalid clock value\n");
-+ return -EINVAL;
-+ }
-+
-+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ if (!res) {
-+ dev_err(&pdev->dev, "can't get device resources\n");
-+ return -ENODEV;
-+ }
-+
-+ res_size = resource_size(res);
-+ if (!request_mem_region(res->start, res_size, res->name)) {
-+ dev_err(&pdev->dev, "can't allocate %d bytes at %d address\n",
-+ res_size, res->start);
-+ return -ENOMEM;
-+ }
-+
-+ base = ioremap(res->start, res_size);
-+ if (!base) {
-+ dev_err(&pdev->dev, "ioremap failed\n");
-+ ret = -EIO;
-+ goto fail0;
-+ }
-+
-+ fa_wdt = kzalloc(sizeof(struct fa_wdt_struct), GFP_KERNEL);
-+ if (!fa_wdt) {
-+ dev_err(&pdev->dev, "can't allocate interface\n");
-+ ret = -ENOMEM;
-+ goto fail1;
-+ }
-+
-+ /* Setup fa_wdt driver structure */
-+ fa_wdt->base = base;
-+ fa_wdt->res = res;
-+ fa_wdt->dev = &pdev->dev;
-+ fa_wdt->clock = pdata->clock;
-+ fa_wdt->max_timeout = 0xffffffffU / pdata->clock;
-+
-+ /* Set up platform driver data */
-+ platform_set_drvdata(pdev, fa_wdt);
-+ fa_wdt_dev = pdev;
-+
-+ if (fa_wdt_miscdev.parent) {
-+ ret = -EBUSY;
-+ goto fail2;
-+ }
-+
-+ ret = register_reboot_notifier(&fa_wdt_notifier);
-+ if (ret)
-+ goto fail2;
-+
-+ fa_wdt_miscdev.parent = &pdev->dev;
-+
-+ ret = misc_register(&fa_wdt_miscdev);
-+ if (ret)
-+ goto fail3;
-+
-+ return 0;
-+
-+fail3:
-+ unregister_reboot_notifier(&fa_wdt_notifier);
-+fail2:
-+ platform_set_drvdata(pdev, NULL);
-+ kfree(fa_wdt);
-+fail1:
-+ iounmap(base);
-+fail0:
-+ release_mem_region(res->start, res_size);
-+
-+ return ret;
-+}
-+
-+static int fa_wdt_remove(struct platform_device *pdev)
-+{
-+ struct fa_wdt_struct *fa_wdt = platform_get_drvdata(pdev);
-+
-+ platform_set_drvdata(pdev, NULL);
-+ misc_deregister(&fa_wdt_miscdev);
-+ unregister_reboot_notifier(&fa_wdt_notifier);
-+ fa_wdt_dev = NULL;
-+ iounmap(fa_wdt->base);
-+ release_mem_region(fa_wdt->res->start, resource_size(fa_wdt->res));
-+
-+ kfree(fa_wdt);
-+
-+ return 0;
-+}
-+
-+#ifdef CONFIG_PM
-+static int fa_wdt_suspend(struct platform_device *pdev, pm_message_t message)
-+{
-+ struct fa_wdt_struct *fa_wdt = platform_get_drvdata(pdev);
-+ unsigned int reg;
-+
-+ reg = __raw_readw(fa_wdt->base + FA_WDCR);
-+ reg &= ~(WDCR_WDENABLE);
-+ __raw_writel(reg, fa_wdt->base + FA_WDCR);
-+
-+ return 0;
-+}
-+
-+static int fa_wdt_resume(struct platform_device *pdev)
-+{
-+ struct fa_wdt_struct *fa_wdt = platform_get_drvdata(pdev);
-+ unsigned int reg;
-+
-+ if (fa_wdt->status) {
-+ reg = __raw_readw(fa_wdt->base + FA_WDCR);
-+ reg |= WDCR_WDENABLE;
-+ __raw_writel(reg, fa_wdt->base + FA_WDCR);
-+ }
-+
-+ return 0;
-+}
-+#else
-+#define fa_wdt_suspend NULL
-+#define fa_wdt_resume NULL
-+#endif
-+
-+static struct platform_driver fa_wdt_driver = {
-+ .probe = fa_wdt_probe,
-+ .remove = fa_wdt_remove,
-+ .shutdown = fa_wdt_shutdown,
-+ .suspend = fa_wdt_suspend,
-+ .resume = fa_wdt_resume,
-+ .driver = {
-+ .name = "fa-wdt",
-+ .owner = THIS_MODULE,
-+ },
-+};
-+
-+static int __init fa_wdt_init(void)
-+{
-+ return platform_driver_probe(&fa_wdt_driver, fa_wdt_probe);
-+}
-+
-+static void __exit fa_wdt_exit(void)
-+{
-+ platform_driver_unregister(&fa_wdt_driver);
-+}
-+
-+module_init(fa_wdt_init);
-+module_exit(fa_wdt_exit);
-+
-+module_param(timeout, uint, 0);
-+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds");
-+
-+module_param(nowayout, int, 0);
-+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
-+
-+MODULE_AUTHOR("Paulius Zaleckas");
-+MODULE_AUTHOR("Gabor Juhos");
-+MODULE_DESCRIPTION("Watchdog driver for Faraday FA526 based SoCs");
-+MODULE_LICENSE("GPL v2");
-+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-+MODULE_ALIAS("platform:fa-wdt");
---- /dev/null
-+++ b/include/linux/fa_wdt.h
-@@ -0,0 +1,13 @@
-+/*
-+ * Platform data definition for the Faraday watchdog driver
-+ */
-+
-+#ifndef _FA_WDT_H
-+#define _FA_WDT_H
-+
-+struct fa_wdt_platform_data {
-+ unsigned int clock;
-+};
-+
-+#endif /* _FA_WDT_H */
-+
generated by cgit v1.1 at 2024-11-10 01:53:44 +0000