Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 149 insertions, 0 deletions

diff --git a/drivers/char/scx200_gpio.c b/drivers/char/scx200_gpio.c
new file mode 100644
index 000000000000..664a6e97eb1a
--- /dev/null
+++ b/drivers/char/scx200_gpio.c
@@ -0,0 +1,149 @@
+/* linux/drivers/char/scx200_gpio.c 
+
+   National Semiconductor SCx200 GPIO driver.  Allows a user space
+   process to play with the GPIO pins.
+
+   Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com> */
+
+#include <linux/config.h>
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#include <linux/scx200_gpio.h>
+
+#define NAME "scx200_gpio"
+
+MODULE_AUTHOR("Christer Weinigel <wingel@nano-system.com>");
+MODULE_DESCRIPTION("NatSemi SCx200 GPIO Pin Driver");
+MODULE_LICENSE("GPL");
+
+static int major = 0;           /* default to dynamic major */
+module_param(major, int, 0);
+MODULE_PARM_DESC(major, "Major device number");
+
+static ssize_t scx200_gpio_write(struct file *file, const char __user *data, 
+                                 size_t len, loff_t *ppos)
+{
+        unsigned m = iminor(file->f_dentry->d_inode);
+        size_t i;
+
+        for (i = 0; i < len; ++i) {
+                char c;
+                if (get_user(c, data+i))
+                        return -EFAULT;
+                switch (c)
+                {
+                case '0': 
+                        scx200_gpio_set(m, 0); 
+                        break;
+                case '1': 
+                        scx200_gpio_set(m, 1); 
+                        break;
+                case 'O':
+                        printk(KERN_INFO NAME ": GPIO%d output enabled\n", m);
+                        scx200_gpio_configure(m, ~1, 1);
+                        break;
+                case 'o':
+                        printk(KERN_INFO NAME ": GPIO%d output disabled\n", m);
+                        scx200_gpio_configure(m, ~1, 0);
+                        break;
+                case 'T':
+                        printk(KERN_INFO NAME ": GPIO%d output is push pull\n", m);
+                        scx200_gpio_configure(m, ~2, 2);
+                        break;
+                case 't':
+                        printk(KERN_INFO NAME ": GPIO%d output is open drain\n", m);
+                        scx200_gpio_configure(m, ~2, 0);
+                        break;
+                case 'P':
+                        printk(KERN_INFO NAME ": GPIO%d pull up enabled\n", m);
+                        scx200_gpio_configure(m, ~4, 4);
+                        break;
+                case 'p':
+                        printk(KERN_INFO NAME ": GPIO%d pull up disabled\n", m);
+                        scx200_gpio_configure(m, ~4, 0);
+                        break;
+                }
+        }
+
+        return len;
+}
+
+static ssize_t scx200_gpio_read(struct file *file, char __user *buf,
+                                size_t len, loff_t *ppos)
+{
+        unsigned m = iminor(file->f_dentry->d_inode);
+        int value;
+
+        value = scx200_gpio_get(m);
+        if (put_user(value ? '1' : '0', buf))
+                return -EFAULT;
+        
+        return 1;
+}
+
+static int scx200_gpio_open(struct inode *inode, struct file *file)
+{
+        unsigned m = iminor(inode);
+        if (m > 63)
+                return -EINVAL;
+        return nonseekable_open(inode, file);
+}
+
+static int scx200_gpio_release(struct inode *inode, struct file *file)
+{
+        return 0;
+}
+
+
+static struct file_operations scx200_gpio_fops = {
+        .owner   = THIS_MODULE,
+        .write   = scx200_gpio_write,
+        .read    = scx200_gpio_read,
+        .open    = scx200_gpio_open,
+        .release = scx200_gpio_release,
+};
+
+static int __init scx200_gpio_init(void)
+{
+        int r;
+
+        printk(KERN_DEBUG NAME ": NatSemi SCx200 GPIO Driver\n");
+
+        if (!scx200_gpio_present()) {
+                printk(KERN_ERR NAME ": no SCx200 gpio pins available\n");
+                return -ENODEV;
+        }
+
+        r = register_chrdev(major, NAME, &scx200_gpio_fops);
+        if (r < 0) {
+                printk(KERN_ERR NAME ": unable to register character device\n");
+                return r;
+        }
+        if (!major) {
+                major = r;
+                printk(KERN_DEBUG NAME ": got dynamic major %d\n", major);
+        }
+
+        return 0;
+}
+
+static void __exit scx200_gpio_cleanup(void)
+{
+        unregister_chrdev(major, NAME);
+}
+
+module_init(scx200_gpio_init);
+module_exit(scx200_gpio_cleanup);
+
+/*
+    Local variables:
+        compile-command: "make -k -C ../.. SUBDIRS=drivers/char modules"
+        c-basic-offset: 8
+    End:
+*/