mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2025-04-21 12:27:27 +03:00
Add ar7-2.6 port (marked as broken for now).
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6600 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
ejka
160
target/linux/ar7-2.6/files/drivers/char/ar7_gpio.c
Normal file
160
target/linux/ar7-2.6/files/drivers/char/ar7_gpio.c
Normal file
@@ -0,0 +1,160 @@
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/*
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* linux/drivers/char/ar7_gpio.c
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*
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* Copyright (C) 2007 OpenWrt.org
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*
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||||
* This program is free software; you can redistribute it and/or modify
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* 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.
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*
|
||||
* This program is distributed in the hope that it will be useful,
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||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/device.h>
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <linux/types.h>
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#include <linux/cdev.h>
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#include <asm/gpio.h>
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#define DRVNAME "ar7_gpio"
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#define LONGNAME "TI AR7 GPIOs Driver"
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MODULE_AUTHOR("Nicolas Thill <nico@openwrt.org>");
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MODULE_DESCRIPTION(LONGNAME);
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MODULE_LICENSE("GPL");
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static int ar7_gpio_major = 0;
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static ssize_t ar7_gpio_write(struct file *file, const char __user *buf,
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size_t len, loff_t *ppos)
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{
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int pin = iminor(file->f_dentry->d_inode);
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size_t i;
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for (i = 0; i < len; ++i) {
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char c;
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if (get_user(c, buf + i))
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return -EFAULT;
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switch (c) {
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case '0':
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gpio_set_value(pin, 0);
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break;
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case '1':
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gpio_set_value(pin, 1);
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break;
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case 'd':
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case 'D':
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ar7_gpio_disable(pin);
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break;
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case 'e':
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case 'E':
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ar7_gpio_enable(pin);
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break;
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case 'i':
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case 'I':
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case '<':
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gpio_direction_input(pin);
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break;
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case 'o':
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case 'O':
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case '>':
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gpio_direction_output(pin);
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break;
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default:
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return -EINVAL;
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}
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}
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return len;
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}
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static ssize_t ar7_gpio_read(struct file *file, char __user * buf,
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size_t len, loff_t * ppos)
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{
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int pin = iminor(file->f_dentry->d_inode);
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int value;
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value = gpio_get_value(pin);
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if (put_user(value ? '1' : '0', buf))
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return -EFAULT;
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return 1;
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}
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static int ar7_gpio_open(struct inode *inode, struct file *file)
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{
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int m = iminor(inode);
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if (m >= AR7_GPIO_MAX)
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return -EINVAL;
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return nonseekable_open(inode, file);
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}
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static int ar7_gpio_release(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static const struct file_operations ar7_gpio_fops = {
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.owner = THIS_MODULE,
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.write = ar7_gpio_write,
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.read = ar7_gpio_read,
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.open = ar7_gpio_open,
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.release = ar7_gpio_release,
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.llseek = no_llseek,
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};
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static struct platform_device *ar7_gpio_device;
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static int __init ar7_gpio_init(void)
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{
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int rc;
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ar7_gpio_device = platform_device_alloc(DRVNAME, -1);
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if (!ar7_gpio_device)
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return -ENOMEM;
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rc = platform_device_add(ar7_gpio_device);
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if (rc < 0)
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goto out_put;
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rc = register_chrdev(ar7_gpio_major, DRVNAME, &ar7_gpio_fops);
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if (rc < 0)
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goto out_put;
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ar7_gpio_major = rc;
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goto out;
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out_put:
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platform_device_put(ar7_gpio_device);
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out:
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return rc;
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}
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static void __exit ar7_gpio_exit(void)
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{
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unregister_chrdev(ar7_gpio_major, DRVNAME);
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platform_device_unregister(ar7_gpio_device);
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}
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module_init(ar7_gpio_init);
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module_exit(ar7_gpio_exit);
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332
target/linux/ar7-2.6/files/drivers/char/watchdog/ar7_wdt.c
Normal file
332
target/linux/ar7-2.6/files/drivers/char/watchdog/ar7_wdt.c
Normal file
@@ -0,0 +1,332 @@
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/*
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* linux/drivers/char/ar7_wdt.c
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*
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* Copyright (C) 2007 OpenWrt.org
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* Copyright (c) 2005 Enrik Berkhan <Enrik.Berkhan@akk.org>
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*
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* Some code taken from:
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* National Semiconductor SCx200 Watchdog support
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* Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
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*
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* 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.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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||||
*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/miscdevice.h>
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#include <linux/watchdog.h>
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#include <linux/notifier.h>
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#include <linux/reboot.h>
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#include <linux/fs.h>
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#include <linux/ioport.h>
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#include <asm/addrspace.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/ar7/ar7.h>
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#define DRVNAME "ar7_wdt"
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#define LONGNAME "TI AR7 Watchdog Timer"
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MODULE_AUTHOR("Nicolas Thill <nico@openwrt.org>");
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MODULE_DESCRIPTION(LONGNAME);
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
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static int margin = 60;
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module_param(margin, int, 0);
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MODULE_PARM_DESC(margin, "Watchdog margin in seconds");
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static int nowayout = WATCHDOG_NOWAYOUT;
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module_param(nowayout, int, 0);
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MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");
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typedef struct {
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u32 kick_lock;
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u32 kick;
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u32 change_lock;
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u32 change ;
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u32 disable_lock;
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u32 disable;
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u32 prescale_lock;
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u32 prescale;
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} ar7_wdt_t;
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static struct semaphore open_semaphore;
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static unsigned expect_close;
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/* XXX correct? assumed to be sysfreq/2. get this dynamically ... */
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#define vbus_freq (ar7_bus_freq() / 2)
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/* XXX currently fixed, allows max margin ~68.72 secs */
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#define prescale_value 0xFFFF
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static void ar7_wdt_kick(u32 value)
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{
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volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
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ar7_wdt->kick_lock = 0x5555;
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if ((ar7_wdt->kick_lock & 3) == 1) {
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ar7_wdt->kick_lock = 0xAAAA;
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if ((ar7_wdt->kick_lock & 3) == 3) {
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ar7_wdt->kick = value;
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return;
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}
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}
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printk(KERN_ERR DRVNAME ": failed to unlock WDT kick reg\n");
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}
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static void ar7_wdt_prescale(u32 value)
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{
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volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
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ar7_wdt->prescale_lock = 0x5A5A;
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if ((ar7_wdt->prescale_lock & 3) == 1) {
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ar7_wdt->prescale_lock = 0xA5A5;
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if ((ar7_wdt->prescale_lock & 3) == 3) {
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ar7_wdt->prescale = value;
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return;
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}
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}
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printk(KERN_ERR DRVNAME ": failed to unlock WDT prescale reg\n");
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}
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static void ar7_wdt_change(u32 value)
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{
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volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
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ar7_wdt->change_lock = 0x6666;
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if ((ar7_wdt->change_lock & 3) == 1) {
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ar7_wdt->change_lock = 0xBBBB;
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if ((ar7_wdt->change_lock & 3) == 3) {
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ar7_wdt->change = value;
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return;
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}
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}
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printk(KERN_ERR DRVNAME ": failed to unlock WDT change reg\n");
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}
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static void ar7_wdt_disable(u32 value)
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{
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volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
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ar7_wdt->disable_lock = 0x7777;
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if ((ar7_wdt->disable_lock & 3) == 1) {
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ar7_wdt->disable_lock = 0xCCCC;
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if ((ar7_wdt->disable_lock & 3) == 2) {
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ar7_wdt->disable_lock = 0xDDDD;
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if ((ar7_wdt->disable_lock & 3) == 3) {
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||||
ar7_wdt->disable = value;
|
||||
return;
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||||
}
|
||||
}
|
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}
|
||||
printk(KERN_ERR DRVNAME ": failed to unlock WDT disable reg\n");
|
||||
}
|
||||
|
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static void ar7_wdt_update_margin(int new_margin)
|
||||
{
|
||||
u32 change;
|
||||
|
||||
change = new_margin * (vbus_freq / prescale_value);
|
||||
if (change < 1) change = 1;
|
||||
if (change > 0xFFFF) change = 0xFFFF;
|
||||
ar7_wdt_change(change);
|
||||
margin = change * prescale_value / vbus_freq;
|
||||
printk(KERN_INFO DRVNAME
|
||||
": timer margin %d seconds (prescale %d, change %d, freq %d)\n",
|
||||
margin, prescale_value, change, vbus_freq);
|
||||
}
|
||||
|
||||
static void ar7_wdt_enable_wdt(void)
|
||||
{
|
||||
printk(KERN_DEBUG DRVNAME ": enabling watchdog timer\n");
|
||||
ar7_wdt_disable(1);
|
||||
ar7_wdt_kick(1);
|
||||
}
|
||||
|
||||
static void ar7_wdt_disable_wdt(void)
|
||||
{
|
||||
printk(KERN_DEBUG DRVNAME ": disabling watchdog timer\n");
|
||||
ar7_wdt_disable(0);
|
||||
}
|
||||
|
||||
static int ar7_wdt_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
/* only allow one at a time */
|
||||
if (down_trylock(&open_semaphore))
|
||||
return -EBUSY;
|
||||
ar7_wdt_enable_wdt();
|
||||
expect_close = 0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ar7_wdt_release(struct inode *inode, struct file *file)
|
||||
{
|
||||
if (!expect_close) {
|
||||
printk(KERN_WARNING DRVNAME ": watchdog device closed unexpectedly, will not disable the watchdog timer\n");
|
||||
} else if (!nowayout) {
|
||||
ar7_wdt_disable_wdt();
|
||||
}
|
||||
up(&open_semaphore);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ar7_wdt_notify_sys(struct notifier_block *this,
|
||||
unsigned long code, void *unused)
|
||||
{
|
||||
if (code == SYS_HALT || code == SYS_POWER_OFF)
|
||||
if (!nowayout)
|
||||
ar7_wdt_disable_wdt();
|
||||
|
||||
return NOTIFY_DONE;
|
||||
}
|
||||
|
||||
static struct notifier_block ar7_wdt_notifier =
|
||||
{
|
||||
.notifier_call = ar7_wdt_notify_sys
|
||||
};
|
||||
|
||||
static ssize_t ar7_wdt_write(struct file *file, const char *data,
|
||||
size_t len, loff_t *ppos)
|
||||
{
|
||||
if (ppos != &file->f_pos)
|
||||
return -ESPIPE;
|
||||
|
||||
/* check for a magic close character */
|
||||
if (len) {
|
||||
size_t i;
|
||||
|
||||
ar7_wdt_kick(1);
|
||||
|
||||
expect_close = 0;
|
||||
for (i = 0; i < len; ++i) {
|
||||
char c;
|
||||
if (get_user(c, data+i))
|
||||
return -EFAULT;
|
||||
if (c == 'V')
|
||||
expect_close = 1;
|
||||
}
|
||||
|
||||
}
|
||||
return len;
|
||||
}
|
||||
|
||||
static int ar7_wdt_ioctl(struct inode *inode, struct file *file,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
static struct watchdog_info ident = {
|
||||
.identity = LONGNAME,
|
||||
.firmware_version = 1,
|
||||
.options = (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING),
|
||||
};
|
||||
int new_margin;
|
||||
|
||||
switch (cmd) {
|
||||
default:
|
||||
return -ENOTTY;
|
||||
case WDIOC_GETSUPPORT:
|
||||
if(copy_to_user((struct watchdog_info *)arg, &ident,
|
||||
sizeof(ident)))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
case WDIOC_GETSTATUS:
|
||||
case WDIOC_GETBOOTSTATUS:
|
||||
if (put_user(0, (int *)arg))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
case WDIOC_KEEPALIVE:
|
||||
ar7_wdt_kick(1);
|
||||
return 0;
|
||||
case WDIOC_SETTIMEOUT:
|
||||
if (get_user(new_margin, (int *)arg))
|
||||
return -EFAULT;
|
||||
if (new_margin < 1)
|
||||
return -EINVAL;
|
||||
|
||||
ar7_wdt_update_margin(new_margin);
|
||||
ar7_wdt_kick(1);
|
||||
|
||||
case WDIOC_GETTIMEOUT:
|
||||
if (put_user(margin, (int *)arg))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
static struct file_operations ar7_wdt_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.write = ar7_wdt_write,
|
||||
.ioctl = ar7_wdt_ioctl,
|
||||
.open = ar7_wdt_open,
|
||||
.release = ar7_wdt_release,
|
||||
};
|
||||
|
||||
static struct miscdevice ar7_wdt_miscdev = {
|
||||
.minor = WATCHDOG_MINOR,
|
||||
.name = "watchdog",
|
||||
.fops = &ar7_wdt_fops,
|
||||
};
|
||||
|
||||
static int __init ar7_wdt_init(void)
|
||||
{
|
||||
int rc;
|
||||
|
||||
if (!request_mem_region(AR7_REGS_WDT, sizeof(ar7_wdt_t), LONGNAME)) {
|
||||
printk(KERN_WARNING DRVNAME ": watchdog I/O region busy\n");
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
ar7_wdt_disable_wdt();
|
||||
ar7_wdt_prescale(prescale_value);
|
||||
ar7_wdt_update_margin(margin);
|
||||
|
||||
sema_init(&open_semaphore, 1);
|
||||
|
||||
rc = misc_register(&ar7_wdt_miscdev);
|
||||
if (rc) {
|
||||
printk(KERN_ERR DRVNAME ": unable to register misc device\n");
|
||||
goto out_alloc;
|
||||
}
|
||||
|
||||
rc = register_reboot_notifier(&ar7_wdt_notifier);
|
||||
if (rc) {
|
||||
printk(KERN_ERR DRVNAME ": unable to register reboot notifier\n");
|
||||
goto out_register;
|
||||
}
|
||||
goto out;
|
||||
|
||||
out_register:
|
||||
misc_deregister(&ar7_wdt_miscdev);
|
||||
out_alloc:
|
||||
release_mem_region(AR7_REGS_WDT, sizeof(ar7_wdt_t));
|
||||
out:
|
||||
return rc;
|
||||
}
|
||||
|
||||
static void __exit ar7_wdt_cleanup(void)
|
||||
{
|
||||
unregister_reboot_notifier(&ar7_wdt_notifier);
|
||||
misc_deregister(&ar7_wdt_miscdev);
|
||||
release_mem_region(AR7_REGS_WDT, sizeof(ar7_wdt_t));
|
||||
}
|
||||
|
||||
module_init(ar7_wdt_init);
|
||||
module_exit(ar7_wdt_cleanup);
|
||||
Reference in New Issue
Block a user