740 lines
16 KiB
C
740 lines
16 KiB
C
/*
|
|
* 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);
|
|
static struct device_node *options_node;
|
|
|
|
/*
|
|
* Copy an openpromio structure into kernel space from user space.
|
|
* This routine does error checking to make sure that all memory
|
|
* accesses are within bounds. A pointer to the allocated openpromio
|
|
* structure will be placed in "*opp_p". Return value is the length
|
|
* of the user supplied buffer.
|
|
*/
|
|
static int copyin(struct openpromio __user *info, struct openpromio **opp_p)
|
|
{
|
|
unsigned int bufsize;
|
|
|
|
if (!info || !opp_p)
|
|
return -EFAULT;
|
|
|
|
if (get_user(bufsize, &info->oprom_size))
|
|
return -EFAULT;
|
|
|
|
if (bufsize == 0)
|
|
return -EINVAL;
|
|
|
|
/* If the bufsize is too large, just limit it.
|
|
* Fix from Jason Rappleye.
|
|
*/
|
|
if (bufsize > OPROMMAXPARAM)
|
|
bufsize = OPROMMAXPARAM;
|
|
|
|
if (!(*opp_p = kzalloc(sizeof(int) + bufsize + 1, GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(&(*opp_p)->oprom_array,
|
|
&info->oprom_array, bufsize)) {
|
|
kfree(*opp_p);
|
|
return -EFAULT;
|
|
}
|
|
return bufsize;
|
|
}
|
|
|
|
static int getstrings(struct openpromio __user *info, struct openpromio **opp_p)
|
|
{
|
|
int n, bufsize;
|
|
char c;
|
|
|
|
if (!info || !opp_p)
|
|
return -EFAULT;
|
|
|
|
if (!(*opp_p = kzalloc(sizeof(int) + OPROMMAXPARAM + 1, GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
|
|
(*opp_p)->oprom_size = 0;
|
|
|
|
n = bufsize = 0;
|
|
while ((n < 2) && (bufsize < OPROMMAXPARAM)) {
|
|
if (get_user(c, &info->oprom_array[bufsize])) {
|
|
kfree(*opp_p);
|
|
return -EFAULT;
|
|
}
|
|
if (c == '\0')
|
|
n++;
|
|
(*opp_p)->oprom_array[bufsize++] = c;
|
|
}
|
|
if (!n) {
|
|
kfree(*opp_p);
|
|
return -EINVAL;
|
|
}
|
|
return bufsize;
|
|
}
|
|
|
|
/*
|
|
* Copy an openpromio structure in kernel space back to user space.
|
|
*/
|
|
static int copyout(void __user *info, struct openpromio *opp, int len)
|
|
{
|
|
if (copy_to_user(info, opp, len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int opromgetprop(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize)
|
|
{
|
|
const void *pval;
|
|
int len;
|
|
|
|
if (!dp ||
|
|
!(pval = of_get_property(dp, op->oprom_array, &len)) ||
|
|
len <= 0 || len > bufsize)
|
|
return copyout(argp, op, sizeof(int));
|
|
|
|
memcpy(op->oprom_array, pval, len);
|
|
op->oprom_array[len] = '\0';
|
|
op->oprom_size = len;
|
|
|
|
return copyout(argp, op, sizeof(int) + bufsize);
|
|
}
|
|
|
|
static int opromnxtprop(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize)
|
|
{
|
|
struct property *prop;
|
|
int len;
|
|
|
|
if (!dp)
|
|
return copyout(argp, op, sizeof(int));
|
|
if (op->oprom_array[0] == '\0') {
|
|
prop = dp->properties;
|
|
if (!prop)
|
|
return copyout(argp, op, sizeof(int));
|
|
len = strlen(prop->name);
|
|
} else {
|
|
prop = of_find_property(dp, op->oprom_array, NULL);
|
|
|
|
if (!prop ||
|
|
!prop->next ||
|
|
(len = strlen(prop->next->name)) + 1 > bufsize)
|
|
return copyout(argp, op, sizeof(int));
|
|
|
|
prop = prop->next;
|
|
}
|
|
|
|
memcpy(op->oprom_array, prop->name, len);
|
|
op->oprom_array[len] = '\0';
|
|
op->oprom_size = ++len;
|
|
|
|
return copyout(argp, op, sizeof(int) + bufsize);
|
|
}
|
|
|
|
static int opromsetopt(struct device_node *dp, struct openpromio *op, int bufsize)
|
|
{
|
|
char *buf = op->oprom_array + strlen(op->oprom_array) + 1;
|
|
int len = op->oprom_array + bufsize - buf;
|
|
|
|
return of_set_property(options_node, op->oprom_array, buf, len);
|
|
}
|
|
|
|
static int opromnext(void __user *argp, unsigned int cmd, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data)
|
|
{
|
|
phandle ph;
|
|
|
|
BUILD_BUG_ON(sizeof(phandle) != sizeof(int));
|
|
|
|
if (bufsize < sizeof(phandle))
|
|
return -EINVAL;
|
|
|
|
ph = *((int *) op->oprom_array);
|
|
if (ph) {
|
|
dp = of_find_node_by_phandle(ph);
|
|
if (!dp)
|
|
return -EINVAL;
|
|
|
|
switch (cmd) {
|
|
case OPROMNEXT:
|
|
dp = dp->sibling;
|
|
break;
|
|
|
|
case OPROMCHILD:
|
|
dp = dp->child;
|
|
break;
|
|
|
|
case OPROMSETCUR:
|
|
default:
|
|
break;
|
|
}
|
|
} else {
|
|
/* Sibling of node zero is the root node. */
|
|
if (cmd != OPROMNEXT)
|
|
return -EINVAL;
|
|
|
|
dp = of_find_node_by_path("/");
|
|
}
|
|
|
|
ph = 0;
|
|
if (dp)
|
|
ph = dp->phandle;
|
|
|
|
data->current_node = dp;
|
|
*((int *) op->oprom_array) = ph;
|
|
op->oprom_size = sizeof(phandle);
|
|
|
|
return copyout(argp, op, bufsize + sizeof(int));
|
|
}
|
|
|
|
static int oprompci2node(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data)
|
|
{
|
|
int err = -EINVAL;
|
|
|
|
if (bufsize >= 2*sizeof(int)) {
|
|
#ifdef CONFIG_PCI
|
|
struct pci_dev *pdev;
|
|
struct device_node *dp;
|
|
|
|
pdev = pci_get_domain_bus_and_slot(0,
|
|
((int *) op->oprom_array)[0],
|
|
((int *) op->oprom_array)[1]);
|
|
|
|
dp = pci_device_to_OF_node(pdev);
|
|
data->current_node = dp;
|
|
*((int *)op->oprom_array) = dp->phandle;
|
|
op->oprom_size = sizeof(int);
|
|
err = copyout(argp, op, bufsize + sizeof(int));
|
|
|
|
pci_dev_put(pdev);
|
|
#endif
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int oprompath2node(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data)
|
|
{
|
|
phandle ph = 0;
|
|
|
|
dp = of_find_node_by_path(op->oprom_array);
|
|
if (dp)
|
|
ph = dp->phandle;
|
|
data->current_node = dp;
|
|
*((int *)op->oprom_array) = ph;
|
|
op->oprom_size = sizeof(int);
|
|
|
|
return copyout(argp, op, bufsize + sizeof(int));
|
|
}
|
|
|
|
static int opromgetbootargs(void __user *argp, struct openpromio *op, int bufsize)
|
|
{
|
|
char *buf = saved_command_line;
|
|
int len = strlen(buf);
|
|
|
|
if (len > bufsize)
|
|
return -EINVAL;
|
|
|
|
strcpy(op->oprom_array, buf);
|
|
op->oprom_size = len;
|
|
|
|
return copyout(argp, op, bufsize + sizeof(int));
|
|
}
|
|
|
|
/*
|
|
* SunOS and Solaris /dev/openprom ioctl calls.
|
|
*/
|
|
static long openprom_sunos_ioctl(struct file * file,
|
|
unsigned int cmd, unsigned long arg,
|
|
struct device_node *dp)
|
|
{
|
|
DATA *data = file->private_data;
|
|
struct openpromio *opp = NULL;
|
|
int bufsize, error = 0;
|
|
static int cnt;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
if (cmd == OPROMSETOPT)
|
|
bufsize = getstrings(argp, &opp);
|
|
else
|
|
bufsize = copyin(argp, &opp);
|
|
|
|
if (bufsize < 0)
|
|
return bufsize;
|
|
|
|
mutex_lock(&openprom_mutex);
|
|
|
|
switch (cmd) {
|
|
case OPROMGETOPT:
|
|
case OPROMGETPROP:
|
|
error = opromgetprop(argp, dp, opp, bufsize);
|
|
break;
|
|
|
|
case OPROMNXTOPT:
|
|
case OPROMNXTPROP:
|
|
error = opromnxtprop(argp, dp, opp, bufsize);
|
|
break;
|
|
|
|
case OPROMSETOPT:
|
|
case OPROMSETOPT2:
|
|
error = opromsetopt(dp, opp, bufsize);
|
|
break;
|
|
|
|
case OPROMNEXT:
|
|
case OPROMCHILD:
|
|
case OPROMSETCUR:
|
|
error = opromnext(argp, cmd, dp, opp, bufsize, data);
|
|
break;
|
|
|
|
case OPROMPCI2NODE:
|
|
error = oprompci2node(argp, dp, opp, bufsize, data);
|
|
break;
|
|
|
|
case OPROMPATH2NODE:
|
|
error = oprompath2node(argp, dp, opp, bufsize, data);
|
|
break;
|
|
|
|
case OPROMGETBOOTARGS:
|
|
error = opromgetbootargs(argp, opp, bufsize);
|
|
break;
|
|
|
|
case OPROMU2P:
|
|
case OPROMGETCONS:
|
|
case OPROMGETFBNAME:
|
|
if (cnt++ < 10)
|
|
printk(KERN_INFO "openprom_sunos_ioctl: unimplemented ioctl\n");
|
|
error = -EINVAL;
|
|
break;
|
|
default:
|
|
if (cnt++ < 10)
|
|
printk(KERN_INFO "openprom_sunos_ioctl: cmd 0x%X, arg 0x%lX\n", cmd, arg);
|
|
error = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
kfree(opp);
|
|
mutex_unlock(&openprom_mutex);
|
|
|
|
return error;
|
|
}
|
|
|
|
static struct device_node *get_node(phandle n, DATA *data)
|
|
{
|
|
struct device_node *dp = of_find_node_by_phandle(n);
|
|
|
|
if (dp)
|
|
data->lastnode = dp;
|
|
|
|
return dp;
|
|
}
|
|
|
|
/* Copy in a whole string from userspace into kernelspace. */
|
|
static char * copyin_string(char __user *user, size_t len)
|
|
{
|
|
if ((ssize_t)len < 0 || (ssize_t)(len + 1) < 0)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
return memdup_user_nul(user, len);
|
|
}
|
|
|
|
/*
|
|
* NetBSD /dev/openprom ioctl calls.
|
|
*/
|
|
static int opiocget(void __user *argp, DATA *data)
|
|
{
|
|
struct opiocdesc op;
|
|
struct device_node *dp;
|
|
char *str;
|
|
const void *pval;
|
|
int err, len;
|
|
|
|
if (copy_from_user(&op, argp, sizeof(op)))
|
|
return -EFAULT;
|
|
|
|
dp = get_node(op.op_nodeid, data);
|
|
|
|
str = copyin_string(op.op_name, op.op_namelen);
|
|
if (IS_ERR(str))
|
|
return PTR_ERR(str);
|
|
|
|
pval = of_get_property(dp, str, &len);
|
|
err = 0;
|
|
if (!pval || len > op.op_buflen) {
|
|
err = -EINVAL;
|
|
} else {
|
|
op.op_buflen = len;
|
|
if (copy_to_user(argp, &op, sizeof(op)) ||
|
|
copy_to_user(op.op_buf, pval, len))
|
|
err = -EFAULT;
|
|
}
|
|
kfree(str);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int opiocnextprop(void __user *argp, DATA *data)
|
|
{
|
|
struct opiocdesc op;
|
|
struct device_node *dp;
|
|
struct property *prop;
|
|
char *str;
|
|
int len;
|
|
|
|
if (copy_from_user(&op, argp, sizeof(op)))
|
|
return -EFAULT;
|
|
|
|
dp = get_node(op.op_nodeid, data);
|
|
if (!dp)
|
|
return -EINVAL;
|
|
|
|
str = copyin_string(op.op_name, op.op_namelen);
|
|
if (IS_ERR(str))
|
|
return PTR_ERR(str);
|
|
|
|
if (str[0] == '\0') {
|
|
prop = dp->properties;
|
|
} else {
|
|
prop = of_find_property(dp, str, NULL);
|
|
if (prop)
|
|
prop = prop->next;
|
|
}
|
|
kfree(str);
|
|
|
|
if (!prop)
|
|
len = 0;
|
|
else
|
|
len = prop->length;
|
|
|
|
if (len > op.op_buflen)
|
|
len = op.op_buflen;
|
|
|
|
if (copy_to_user(argp, &op, sizeof(op)))
|
|
return -EFAULT;
|
|
|
|
if (len &&
|
|
copy_to_user(op.op_buf, prop->value, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int opiocset(void __user *argp, DATA *data)
|
|
{
|
|
struct opiocdesc op;
|
|
struct device_node *dp;
|
|
char *str, *tmp;
|
|
int err;
|
|
|
|
if (copy_from_user(&op, argp, sizeof(op)))
|
|
return -EFAULT;
|
|
|
|
dp = get_node(op.op_nodeid, data);
|
|
if (!dp)
|
|
return -EINVAL;
|
|
|
|
str = copyin_string(op.op_name, op.op_namelen);
|
|
if (IS_ERR(str))
|
|
return PTR_ERR(str);
|
|
|
|
tmp = copyin_string(op.op_buf, op.op_buflen);
|
|
if (IS_ERR(tmp)) {
|
|
kfree(str);
|
|
return PTR_ERR(tmp);
|
|
}
|
|
|
|
err = of_set_property(dp, str, tmp, op.op_buflen);
|
|
|
|
kfree(str);
|
|
kfree(tmp);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int opiocgetnext(unsigned int cmd, void __user *argp)
|
|
{
|
|
struct device_node *dp;
|
|
phandle nd;
|
|
|
|
BUILD_BUG_ON(sizeof(phandle) != sizeof(int));
|
|
|
|
if (copy_from_user(&nd, argp, sizeof(phandle)))
|
|
return -EFAULT;
|
|
|
|
if (nd == 0) {
|
|
if (cmd != OPIOCGETNEXT)
|
|
return -EINVAL;
|
|
dp = of_find_node_by_path("/");
|
|
} else {
|
|
dp = of_find_node_by_phandle(nd);
|
|
nd = 0;
|
|
if (dp) {
|
|
if (cmd == OPIOCGETNEXT)
|
|
dp = dp->sibling;
|
|
else
|
|
dp = dp->child;
|
|
}
|
|
}
|
|
if (dp)
|
|
nd = dp->phandle;
|
|
if (copy_to_user(argp, &nd, sizeof(phandle)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int openprom_bsd_ioctl(struct file * file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
DATA *data = file->private_data;
|
|
void __user *argp = (void __user *)arg;
|
|
int err;
|
|
|
|
mutex_lock(&openprom_mutex);
|
|
switch (cmd) {
|
|
case OPIOCGET:
|
|
err = opiocget(argp, data);
|
|
break;
|
|
|
|
case OPIOCNEXTPROP:
|
|
err = opiocnextprop(argp, data);
|
|
break;
|
|
|
|
case OPIOCSET:
|
|
err = opiocset(argp, data);
|
|
break;
|
|
|
|
case OPIOCGETOPTNODE:
|
|
BUILD_BUG_ON(sizeof(phandle) != sizeof(int));
|
|
|
|
err = 0;
|
|
if (copy_to_user(argp, &options_node->phandle, sizeof(phandle)))
|
|
err = -EFAULT;
|
|
break;
|
|
|
|
case OPIOCGETNEXT:
|
|
case OPIOCGETCHILD:
|
|
err = opiocgetnext(cmd, argp);
|
|
break;
|
|
|
|
default:
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
mutex_unlock(&openprom_mutex);
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
* Handoff control to the correct ioctl handler.
|
|
*/
|
|
static long openprom_ioctl(struct file * file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
DATA *data = file->private_data;
|
|
|
|
switch (cmd) {
|
|
case OPROMGETOPT:
|
|
case OPROMNXTOPT:
|
|
if ((file->f_mode & FMODE_READ) == 0)
|
|
return -EPERM;
|
|
return openprom_sunos_ioctl(file, cmd, arg,
|
|
options_node);
|
|
|
|
case OPROMSETOPT:
|
|
case OPROMSETOPT2:
|
|
if ((file->f_mode & FMODE_WRITE) == 0)
|
|
return -EPERM;
|
|
return openprom_sunos_ioctl(file, cmd, arg,
|
|
options_node);
|
|
|
|
case OPROMNEXT:
|
|
case OPROMCHILD:
|
|
case OPROMGETPROP:
|
|
case OPROMNXTPROP:
|
|
if ((file->f_mode & FMODE_READ) == 0)
|
|
return -EPERM;
|
|
return openprom_sunos_ioctl(file, cmd, arg,
|
|
data->current_node);
|
|
|
|
case OPROMU2P:
|
|
case OPROMGETCONS:
|
|
case OPROMGETFBNAME:
|
|
case OPROMGETBOOTARGS:
|
|
case OPROMSETCUR:
|
|
case OPROMPCI2NODE:
|
|
case OPROMPATH2NODE:
|
|
if ((file->f_mode & FMODE_READ) == 0)
|
|
return -EPERM;
|
|
return openprom_sunos_ioctl(file, cmd, arg, NULL);
|
|
|
|
case OPIOCGET:
|
|
case OPIOCNEXTPROP:
|
|
case OPIOCGETOPTNODE:
|
|
case OPIOCGETNEXT:
|
|
case OPIOCGETCHILD:
|
|
if ((file->f_mode & FMODE_READ) == 0)
|
|
return -EBADF;
|
|
return openprom_bsd_ioctl(file,cmd,arg);
|
|
|
|
case OPIOCSET:
|
|
if ((file->f_mode & FMODE_WRITE) == 0)
|
|
return -EBADF;
|
|
return openprom_bsd_ioctl(file,cmd,arg);
|
|
|
|
default:
|
|
return -EINVAL;
|
|
};
|
|
}
|
|
|
|
static long openprom_compat_ioctl(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
long rval = -ENOTTY;
|
|
|
|
/*
|
|
* SunOS/Solaris only, the NetBSD one's have embedded pointers in
|
|
* the arg which we'd need to clean up...
|
|
*/
|
|
switch (cmd) {
|
|
case OPROMGETOPT:
|
|
case OPROMSETOPT:
|
|
case OPROMNXTOPT:
|
|
case OPROMSETOPT2:
|
|
case OPROMNEXT:
|
|
case OPROMCHILD:
|
|
case OPROMGETPROP:
|
|
case OPROMNXTPROP:
|
|
case OPROMU2P:
|
|
case OPROMGETCONS:
|
|
case OPROMGETFBNAME:
|
|
case OPROMGETBOOTARGS:
|
|
case OPROMSETCUR:
|
|
case OPROMPCI2NODE:
|
|
case OPROMPATH2NODE:
|
|
rval = openprom_ioctl(file, cmd, arg);
|
|
break;
|
|
}
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int openprom_open(struct inode * inode, struct file * file)
|
|
{
|
|
DATA *data;
|
|
|
|
data = kmalloc(sizeof(DATA), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
mutex_lock(&openprom_mutex);
|
|
data->current_node = of_find_node_by_path("/");
|
|
data->lastnode = data->current_node;
|
|
file->private_data = (void *) data;
|
|
mutex_unlock(&openprom_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int openprom_release(struct inode * inode, struct file * file)
|
|
{
|
|
kfree(file->private_data);
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations openprom_fops = {
|
|
.owner = THIS_MODULE,
|
|
.llseek = no_llseek,
|
|
.unlocked_ioctl = openprom_ioctl,
|
|
.compat_ioctl = openprom_compat_ioctl,
|
|
.open = openprom_open,
|
|
.release = openprom_release,
|
|
};
|
|
|
|
static struct miscdevice openprom_dev = {
|
|
.minor = SUN_OPENPROM_MINOR,
|
|
.name = "openprom",
|
|
.fops = &openprom_fops,
|
|
};
|
|
|
|
static int __init openprom_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = misc_register(&openprom_dev);
|
|
if (err)
|
|
return err;
|
|
|
|
options_node = of_get_child_by_name(of_find_node_by_path("/"), "options");
|
|
if (!options_node) {
|
|
misc_deregister(&openprom_dev);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit openprom_cleanup(void)
|
|
{
|
|
misc_deregister(&openprom_dev);
|
|
}
|
|
|
|
module_init(openprom_init);
|
|
module_exit(openprom_cleanup);
|