macintosh/nvram: Remove as unused

/*

 * /dev/nvram driver for Power Macintosh.

 */

#define NVRAM_VERSION "1.0"

#include <linux/module.h>

#include <linux/types.h>

#include <linux/errno.h>

#include <linux/fs.h>

#include <linux/miscdevice.h>

#include <linux/fcntl.h>

#include <linux/nvram.h>

#include <linux/init.h>

#include <asm/uaccess.h>

#include <asm/nvram.h>

#define NVRAM_SIZE	8192

static loff_t nvram_llseek(struct file *file, loff_t offset, int origin)

{

	switch (origin) {

	case 0:

		break;

	case 1:

		offset += file->f_pos;

		break;

	case 2:

		offset += NVRAM_SIZE;

		break;

	default:

		offset = -1;

	}

	if (offset < 0)

		return -EINVAL;

	file->f_pos = offset;

	return file->f_pos;

}

static ssize_t read_nvram(struct file *file, char __user *buf,

			  size_t count, loff_t *ppos)

{

	unsigned int i;

	char __user *p = buf;

	if (!access_ok(VERIFY_WRITE, buf, count))

		return -EFAULT;

	if (*ppos >= NVRAM_SIZE)

		return 0;

	for (i = *ppos; count > 0 && i < NVRAM_SIZE; ++i, ++p, --count)

		if (__put_user(nvram_read_byte(i), p))

			return -EFAULT;

	*ppos = i;

	return p - buf;

}

static ssize_t write_nvram(struct file *file, const char __user *buf,

			   size_t count, loff_t *ppos)

{

	unsigned int i;

	const char __user *p = buf;

	char c;

	if (!access_ok(VERIFY_READ, buf, count))

		return -EFAULT;

	if (*ppos >= NVRAM_SIZE)

		return 0;

	for (i = *ppos; count > 0 && i < NVRAM_SIZE; ++i, ++p, --count) {

		if (__get_user(c, p))

			return -EFAULT;

		nvram_write_byte(c, i);

	}

	*ppos = i;

	return p - buf;

}

static long nvram_ioctl(struct file *file, unsigned int cmd, unsigned long arg)

{

	switch(cmd) {

		case PMAC_NVRAM_GET_OFFSET:

		{

			int part, offset;

			if (copy_from_user(&part, (void __user*)arg, sizeof(part)) != 0)

				return -EFAULT;

			if (part < pmac_nvram_OF || part > pmac_nvram_NR)

				return -EINVAL;

			offset = pmac_get_partition(part);

			if (copy_to_user((void __user*)arg, &offset, sizeof(offset)) != 0)

				return -EFAULT;

			break;

		}

		default:

			return -EINVAL;

	}

	return 0;

}

const struct file_operations nvram_fops = {

	.owner		= THIS_MODULE,

	.llseek		= nvram_llseek,

	.read		= read_nvram,

	.write		= write_nvram,

	.unlocked_ioctl	= nvram_ioctl,

};

static struct miscdevice nvram_dev = {

	NVRAM_MINOR,

	"nvram",

	&nvram_fops

};

int __init nvram_init(void)

{

	printk(KERN_INFO "Macintosh non-volatile memory driver v%s\n",

		NVRAM_VERSION);

	return misc_register(&nvram_dev);

}

void __exit nvram_cleanup(void)

{

        misc_deregister( &nvram_dev );

}

module_init(nvram_init);

module_exit(nvram_cleanup);

MODULE_LICENSE("GPL");