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/string.h>
  29 #include <linux/ctype.h>
  30 #include <linux/mmc/sdio_func.h>
  31 #include <linux/mmc/sdio.h>
  32 #include <linux/debugfs.h>
  33
  34 #include "iwmc3200top.h"
  35 #include "fw-msg.h"
  36 #include "log.h"
  37 #include "debugfs.h"
  38
  39
  40
  41 /*      Constants definition        */
  42 #define HEXADECIMAL_RADIX       16
  43
  44 /*      Functions definition        */
  45
  46
  47 #define DEBUGFS_ADD(name, parent) do {                                  \
  48         dbgfs->dbgfs_##parent##_files.file_##name =                     \
  49         debugfs_create_file(#name, 0644, dbgfs->dir_##parent, priv,     \
  50                                 &iwmct_dbgfs_##name##_ops);             \
  51 } while (0)
  52
  53 #define DEBUGFS_RM(name)  do {          \
  54         debugfs_remove(name);           \
  55         name = NULL;                    \
  56 } while (0)
  57
  58 #define DEBUGFS_READ_FUNC(name)                                         \
  59 ssize_t iwmct_dbgfs_##name##_read(struct file *file,                    \
  60                                   char __user *user_buf,                \
  61                                   size_t count, loff_t *ppos);
  62
  63 #define DEBUGFS_WRITE_FUNC(name)                                        \
  64 ssize_t iwmct_dbgfs_##name##_write(struct file *file,                   \
  65                                    const char __user *user_buf,         \
  66                                    size_t count, loff_t *ppos);
  67
  68 #define DEBUGFS_READ_FILE_OPS(name)                                     \
  69         DEBUGFS_READ_FUNC(name)                                         \
  70         static const struct file_operations iwmct_dbgfs_##name##_ops = {  \
  71                 .read = iwmct_dbgfs_##name##_read,                      \
  72                 .open = iwmct_dbgfs_open_file_generic,                  \
  73         };
  74
  75 #define DEBUGFS_WRITE_FILE_OPS(name)                                    \
  76         DEBUGFS_WRITE_FUNC(name)                                        \
  77         static const struct file_operations iwmct_dbgfs_##name##_ops = {  \
  78                 .write = iwmct_dbgfs_##name##_write,                    \
  79                 .open = iwmct_dbgfs_open_file_generic,                  \
  80         };
  81
  82 #define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
  83         DEBUGFS_READ_FUNC(name)                                         \
  84         DEBUGFS_WRITE_FUNC(name)                                        \
  85         static const struct file_operations iwmct_dbgfs_##name##_ops = {\
  86                 .write = iwmct_dbgfs_##name##_write,                    \
  87                 .read = iwmct_dbgfs_##name##_read,                      \
  88                 .open = iwmct_dbgfs_open_file_generic,                  \
  89         };
  90
  91
  92 /*      Debugfs file ops definitions        */
  93
  94 /*
  95  * Create the debugfs files and directories
  96  *
  97  */
  98 void iwmct_dbgfs_register(struct iwmct_priv *priv, const char *name)
  99 {
 100         struct iwmct_debugfs *dbgfs;
 101
 102         dbgfs = kzalloc(sizeof(struct iwmct_debugfs), GFP_KERNEL);
 103         if (!dbgfs) {
 104                 LOG_ERROR(priv, DEBUGFS, "failed to allocate %zd bytes\n",
 105                                         sizeof(struct iwmct_debugfs));
 106                 return;
 107         }
 108
 109         priv->dbgfs = dbgfs;
 110         dbgfs->name = name;
 111         dbgfs->dir_drv = debugfs_create_dir(name, NULL);
 112         if (!dbgfs->dir_drv) {
 113                 LOG_ERROR(priv, DEBUGFS, "failed to create debugfs dir\n");
 114                 return;
 115         }
 116
 117         return;
 118 }
 119
 120 /**
 121  * Remove the debugfs files and directories
 122  *
 123  */
 124 void iwmct_dbgfs_unregister(struct iwmct_debugfs *dbgfs)
 125 {
 126         if (!dbgfs)
 127                 return;
 128
 129         DEBUGFS_RM(dbgfs->dir_drv);
 130         kfree(dbgfs);
 131         dbgfs = NULL;
 132 }
 133