-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;