drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.c

   1 /*
   2  * Copyright (c) 2012 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16 #include <linux/debugfs.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/if.h>
  19 #include <linux/ieee80211.h>
  20
  21 #include <defs.h>
  22 #include <brcmu_wifi.h>
  23 #include <brcmu_utils.h>
  24 #include "dhd.h"
  25 #include "dhd_bus.h"
  26
  27 static struct dentry *root_folder;
  28
  29 void brcmf_debugfs_init(void)
  30 {
  31         root_folder = debugfs_create_dir(KBUILD_MODNAME, NULL);
  32         if (IS_ERR(root_folder))
  33                 root_folder = NULL;
  34 }
  35
  36 void brcmf_debugfs_exit(void)
  37 {
  38         if (!root_folder)
  39                 return;
  40
  41         debugfs_remove_recursive(root_folder);
  42         root_folder = NULL;
  43 }
  44
  45 int brcmf_debugfs_attach(struct brcmf_pub *drvr)
  46 {
  47         if (!root_folder)
  48                 return -ENODEV;
  49
  50         drvr->dbgfs_dir = debugfs_create_dir(dev_name(drvr->dev), root_folder);
  51         return PTR_RET(drvr->dbgfs_dir);
  52 }
  53
  54 void brcmf_debugfs_detach(struct brcmf_pub *drvr)
  55 {
  56         if (!IS_ERR_OR_NULL(drvr->dbgfs_dir))
  57                 debugfs_remove_recursive(drvr->dbgfs_dir);
  58 }
  59
  60 struct dentry *brcmf_debugfs_get_devdir(struct brcmf_pub *drvr)
  61 {
  62         return drvr->dbgfs_dir;
  63 }