linux-imx

/*

 * Linux/SPARC PROM Configuration Driver

 * Copyright (C) 1996 Thomas K. Dyas (tdyas@noc.rutgers.edu)

 * Copyright (C) 1996 Eddie C. Dost  (ecd@skynet.be)

 *

 * This character device driver allows user programs to access the

 * PROM device tree. It is compatible with the SunOS /dev/openprom

 * driver and the NetBSD /dev/openprom driver. The SunOS eeprom

 * utility works without any modifications.

 *

 * The driver uses a minor number under the misc device major. The

 * file read/write mode determines the type of access to the PROM.

 * Interrupts are disabled whenever the driver calls into the PROM for

 * sanity's sake.

 */

​

/* 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., 675 Mass Ave, Cambridge, MA 02139, USA. 

 */

​

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/errno.h>

#include <linux/slab.h>

#include <linux/mutex.h>

#include <linux/string.h>

#include <linux/miscdevice.h>

#include <linux/init.h>

#include <linux/fs.h>

#include <asm/oplib.h>

#include <asm/prom.h>

#include <linux/uaccess.h>

#include <asm/openpromio.h>

#ifdef CONFIG_PCI

#include <linux/pci.h>

#endif

​

MODULE_AUTHOR("Thomas K. Dyas (tdyas@noc.rutgers.edu) and Eddie C. Dost  (ecd@skynet.be)");

MODULE_DESCRIPTION("OPENPROM Configuration Driver");

MODULE_LICENSE("GPL");

MODULE_VERSION("1.0");

MODULE_ALIAS_MISCDEV(SUN_OPENPROM_MINOR);

​

/* Private data kept by the driver for each descriptor. */

typedef struct openprom_private_data

{

    struct device_node *current_node; /* Current node for SunOS ioctls. */

    struct device_node *lastnode; /* Last valid node used by BSD ioctls. */

} DATA;

​

/* ID of the PROM node containing all of the EEPROM options. */

static DEFINE_MUTEX(openprom_mutex);