drivers/misc/iwmc3200top/debugfs.c

   1 /*
   2  * iwmc3200top - Intel Wireless MultiCom 3200 Top Driver
   3  * drivers/misc/iwmc3200top/debufs.c
   4  *
   5  * Copyright (C) 2009 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License version
   9  * 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19  * 02110-1301, USA.
  20  *
  21  *
  22  * Author Name: Maxim Grabarnik <maxim.grabarnink@intel.com>
  23  *  -
  24  *
  25  */
  26
  27 #include <linux/kernel.h>
  28 #include <linux/slab.h>
  29 #include <linux/string.h>
  30 #include <linux/ctype.h>
  31 #include <linux/mmc/sdio_func.h>
  32 #include <linux/mmc/sdio.h>
  33 #include <linux/debugfs.h>
  34
  35 #include "iwmc3200top.h"
  36 #include "fw-msg.h"
  37 #include "log.h"
  38 #include "debugfs.h"
  39
  40
  41
  42 /*      Constants definition        */
  43 #define HEXADECIMAL_RADIX       16
  44
  45 /*      Functions definition        */
  46
  47
  48 #define DEBUGFS_ADD(name, parent) do {                                  \
  49         dbgfs->dbgfs_##parent##_files.file_##name =                     \
  50         debugfs_create_file(#name, 0644, dbgfs->dir_##parent, priv,     \
  51                                 &iwmct_dbgfs_##name##_ops);             \
  52 } while (0)
  53
  54 #define DEBUGFS_RM(name)  do {          \
  55         debugfs_remove(name);           \
  56         name = NULL;                    \
  57 } while (0)
  58
  59 #define DEBUGFS_READ_FUNC(name)                                         \
  60 ssize_t iwmct_dbgfs_##name##_read(struct file *file,                    \
  61                                   char __user *user_buf,                \
  62                                   size_t count, loff_t *ppos);
  63
  64 #define DEBUGFS_WRITE_FUNC(name)                                        \
  65 ssize_t iwmct_dbgfs_##name##_write(struct file *file,                   \
  66                                    const char __user *user_buf,         \
  67                                    size_t count, loff_t *ppos);
  68
  69 #define DEBUGFS_READ_FILE_OPS(name)                                     \
  70         DEBUGFS_READ_FUNC(name)                                         \
  71         static const struct file_operations iwmct_dbgfs_##name##_ops = {  \
  72                 .read = iwmct_dbgfs_##name##_read,                      \
  73                 .open = iwmct_dbgfs_open_file_generic,                  \
  74                 .llseek = generic_file_llseek,                          \
  75         };
  76
  77 #define DEBUGFS_WRITE_FILE_OPS(name)                                    \
  78         DEBUGFS_WRITE_FUNC(name)                                        \
  79         static const struct file_operations iwmct_dbgfs_##name##_ops = {  \
  80                 .write = iwmct_dbgfs_##name##_write,                    \
  81                 .open = iwmct_dbgfs_open_file_generic,                  \
  82                 .llseek = generic_file_llseek,                          \
  83         };
  84
  85 #define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
  86         DEBUGFS_READ_FUNC(name)                                         \
  87         DEBUGFS_WRITE_FUNC(name)                                        \
  88         static const struct file_operations iwmct_dbgfs_##name##_ops = {\
  89                 .write = iwmct_dbgfs_##name##_write,                    \
  90                 .read = iwmct_dbgfs_##name##_read,                      \
  91                 .open = iwmct_dbgfs_open_file_generic,                  \
  92                 .llseek = generic_file_llseek,                          \
  93         };
  94
  95
  96 /*      Debugfs file ops definitions        */
  97
  98 /*
  99  * Create the debugfs files and directories
 100  *
 101  */
 102 void iwmct_dbgfs_register(struct iwmct_priv *priv, const char *name)
 103 {
 104         struct iwmct_debugfs *dbgfs;
 105
 106         dbgfs = kzalloc(sizeof(struct iwmct_debugfs), GFP_KERNEL);
 107         if (!dbgfs) {
 108                 LOG_ERROR(priv, DEBUGFS, "failed to allocate %zd bytes\n",
 109                                         sizeof(struct iwmct_debugfs));
 110                 return;
 111         }
 112
 113         priv->dbgfs = dbgfs;
 114         dbgfs->name = name;
 115         dbgfs->dir_drv = debugfs_create_dir(name, NULL);
 116         if (!dbgfs->dir_drv) {
 117                 LOG_ERROR(priv, DEBUGFS, "failed to create debugfs dir\n");
 118                 return;
 119         }
 120
 121         return;
 122 }
 123
 124 /**
 125  * Remove the debugfs files and directories
 126  *
 127  */
 128 void iwmct_dbgfs_unregister(struct iwmct_debugfs *dbgfs)
 129 {
 130         if (!dbgfs)
 131                 return;
 132
 133         DEBUGFS_RM(dbgfs->dir_drv);
 134         kfree(dbgfs);
 135         dbgfs = NULL;
 136 }
 137