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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/drivers/sbus/char/openprom.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-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.c | 762 |
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); |