drivers/bluetooth/btmrvl_debugfs.c

   1 /**
   2  * Marvell Bluetooth driver: debugfs related functions
   3  *
   4  * Copyright (C) 2009, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  *
  15  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  18  * this warranty disclaimer.
  19  **/
  20
  21 #include <linux/debugfs.h>
  22 #include <linux/slab.h>
  23
  24 #include <net/bluetooth/bluetooth.h>
  25 #include <net/bluetooth/hci_core.h>
  26
  27 #include "btmrvl_drv.h"
  28
  29 struct btmrvl_debugfs_data {
  30         struct dentry *config_dir;
  31         struct dentry *status_dir;
  32 };
  33
  34 static ssize_t btmrvl_hscfgcmd_write(struct file *file,
  35                         const char __user *ubuf, size_t count, loff_t *ppos)
  36 {
  37         struct btmrvl_private *priv = file->private_data;
  38         long result, ret;
  39
  40         ret = kstrtol_from_user(ubuf, count, 10, &result);
  41         if (ret)
  42                 return ret;
  43
  44         priv->btmrvl_dev.hscfgcmd = result;
  45
  46         if (priv->btmrvl_dev.hscfgcmd) {
  47                 btmrvl_prepare_command(priv);
  48                 wake_up_interruptible(&priv->main_thread.wait_q);
  49         }
  50
  51         return count;
  52 }
  53
  54 static ssize_t btmrvl_hscfgcmd_read(struct file *file, char __user *userbuf,
  55                                                 size_t count, loff_t *ppos)
  56 {
  57         struct btmrvl_private *priv = file->private_data;
  58         char buf[16];
  59         int ret;
  60
  61         ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
  62                                                 priv->btmrvl_dev.hscfgcmd);
  63
  64         return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
  65 }
  66
  67 static const struct file_operations btmrvl_hscfgcmd_fops = {
  68         .read   = btmrvl_hscfgcmd_read,
  69         .write  = btmrvl_hscfgcmd_write,
  70         .open   = simple_open,
  71         .llseek = default_llseek,
  72 };
  73
  74 static ssize_t btmrvl_pscmd_write(struct file *file, const char __user *ubuf,
  75                                                 size_t count, loff_t *ppos)
  76 {
  77         struct btmrvl_private *priv = file->private_data;
  78         long result, ret;
  79
  80         ret = kstrtol_from_user(ubuf, count, 10, &result);
  81         if (ret)
  82                 return ret;
  83
  84         priv->btmrvl_dev.pscmd = result;
  85
  86         if (priv->btmrvl_dev.pscmd) {
  87                 btmrvl_prepare_command(priv);
  88                 wake_up_interruptible(&priv->main_thread.wait_q);
  89         }
  90
  91         return count;
  92
  93 }
  94
  95 static ssize_t btmrvl_pscmd_read(struct file *file, char __user *userbuf,
  96                                                 size_t count, loff_t *ppos)
  97 {
  98         struct btmrvl_private *priv = file->private_data;
  99         char buf[16];
 100         int ret;
 101
 102         ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->btmrvl_dev.pscmd);
 103
 104         return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
 105 }
 106
 107 static const struct file_operations btmrvl_pscmd_fops = {
 108         .read = btmrvl_pscmd_read,
 109         .write = btmrvl_pscmd_write,
 110         .open = simple_open,
 111         .llseek = default_llseek,
 112 };
 113
 114 static ssize_t btmrvl_hscmd_write(struct file *file, const char __user *ubuf,
 115                                                 size_t count, loff_t *ppos)
 116 {
 117         struct btmrvl_private *priv = file->private_data;
 118         long result, ret;
 119
 120         ret = kstrtol_from_user(ubuf, count, 10, &result);
 121         if (ret)
 122                 return ret;
 123
 124         priv->btmrvl_dev.hscmd = result;
 125         if (priv->btmrvl_dev.hscmd) {
 126                 btmrvl_prepare_command(priv);
 127                 wake_up_interruptible(&priv->main_thread.wait_q);
 128         }
 129
 130         return count;
 131 }
 132
 133 static ssize_t btmrvl_hscmd_read(struct file *file, char __user *userbuf,
 134                                                 size_t count, loff_t *ppos)
 135 {
 136         struct btmrvl_private *priv = file->private_data;
 137         char buf[16];
 138         int ret;
 139
 140         ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->btmrvl_dev.hscmd);
 141
 142         return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
 143 }
 144
 145 static const struct file_operations btmrvl_hscmd_fops = {
 146         .read   = btmrvl_hscmd_read,
 147         .write  = btmrvl_hscmd_write,
 148         .open   = simple_open,
 149         .llseek = default_llseek,
 150 };
 151
 152 void btmrvl_debugfs_init(struct hci_dev *hdev)
 153 {
 154         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 155         struct btmrvl_debugfs_data *dbg;
 156
 157         if (!hdev->debugfs)
 158                 return;
 159
 160         dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
 161         priv->debugfs_data = dbg;
 162
 163         if (!dbg) {
 164                 BT_ERR("Can not allocate memory for btmrvl_debugfs_data.");
 165                 return;
 166         }
 167
 168         dbg->config_dir = debugfs_create_dir("config", hdev->debugfs);
 169
 170         debugfs_create_u8("psmode", 0644, dbg->config_dir,
 171                           &priv->btmrvl_dev.psmode);
 172         debugfs_create_file("pscmd", 0644, dbg->config_dir,
 173                             priv, &btmrvl_pscmd_fops);
 174         debugfs_create_x16("gpiogap", 0644, dbg->config_dir,
 175                            &priv->btmrvl_dev.gpio_gap);
 176         debugfs_create_u8("hsmode", 0644, dbg->config_dir,
 177                           &priv->btmrvl_dev.hsmode);
 178         debugfs_create_file("hscmd", 0644, dbg->config_dir,
 179                             priv, &btmrvl_hscmd_fops);
 180         debugfs_create_file("hscfgcmd", 0644, dbg->config_dir,
 181                             priv, &btmrvl_hscfgcmd_fops);
 182
 183         dbg->status_dir = debugfs_create_dir("status", hdev->debugfs);
 184         debugfs_create_u8("curpsmode", 0444, dbg->status_dir,
 185                           &priv->adapter->psmode);
 186         debugfs_create_u8("psstate", 0444, dbg->status_dir,
 187                           &priv->adapter->ps_state);
 188         debugfs_create_u8("hsstate", 0444, dbg->status_dir,
 189                           &priv->adapter->hs_state);
 190         debugfs_create_u8("txdnldready", 0444, dbg->status_dir,
 191                           &priv->btmrvl_dev.tx_dnld_rdy);
 192 }
 193
 194 void btmrvl_debugfs_remove(struct hci_dev *hdev)
 195 {
 196         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 197         struct btmrvl_debugfs_data *dbg = priv->debugfs_data;
 198
 199         if (!dbg)
 200                 return;
 201
 202         debugfs_remove_recursive(dbg->config_dir);
 203         debugfs_remove_recursive(dbg->status_dir);
 204
 205         kfree(dbg);
 206 }