summaryrefslogtreecommitdiff
path: root/ANDROID_3.4.5/drivers/sbus/char/openprom.c
diff options
context:
space:
mode:
authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/drivers/sbus/char/openprom.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
downloadFOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz
FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2
FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/drivers/sbus/char/openprom.c')
-rw-r--r--ANDROID_3.4.5/drivers/sbus/char/openprom.c762
1 files changed, 0 insertions, 762 deletions
diff --git a/ANDROID_3.4.5/drivers/sbus/char/openprom.c b/ANDROID_3.4.5/drivers/sbus/char/openprom.c
deleted file mode 100644
index 2236aea3..00000000
--- a/ANDROID_3.4.5/drivers/sbus/char/openprom.c
+++ /dev/null
@@ -1,762 +0,0 @@
-/*
- * 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 <asm/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_bus_and_slot (((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 int copyin_string(char __user *user, size_t len, char **ptr)
-{
- char *tmp;
-
- if ((ssize_t)len < 0 || (ssize_t)(len + 1) < 0)
- return -EINVAL;
-
- tmp = kmalloc(len + 1, GFP_KERNEL);
- if (!tmp)
- return -ENOMEM;
-
- if (copy_from_user(tmp, user, len)) {
- kfree(tmp);
- return -EFAULT;
- }
-
- tmp[len] = '\0';
-
- *ptr = tmp;
-
- return 0;
-}
-
-/*
- * 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);
-
- err = copyin_string(op.op_name, op.op_namelen, &str);
- if (err)
- return err;
-
- 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 err, len;
-
- if (copy_from_user(&op, argp, sizeof(op)))
- return -EFAULT;
-
- dp = get_node(op.op_nodeid, data);
- if (!dp)
- return -EINVAL;
-
- err = copyin_string(op.op_name, op.op_namelen, &str);
- if (err)
- return err;
-
- 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;
-
- err = copyin_string(op.op_name, op.op_namelen, &str);
- if (err)
- return err;
-
- err = copyin_string(op.op_buf, op.op_buflen, &tmp);
- if (err) {
- kfree(str);
- return err;
- }
-
- 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)
-{
- struct device_node *dp;
- int err;
-
- err = misc_register(&openprom_dev);
- if (err)
- return err;
-
- dp = of_find_node_by_path("/");
- dp = dp->child;
- while (dp) {
- if (!strcmp(dp->name, "options"))
- break;
- dp = dp->sibling;
- }
- options_node = dp;
-
- 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);