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         char buf[16];
  39         long result, ret;
  40
  41         memset(buf, 0, sizeof(buf));
  42
  43         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
  44                 return -EFAULT;
  45
  46         ret = kstrtol(buf, 10, &result);
  47         if (ret)
  48                 return ret;
  49
  50         priv->btmrvl_dev.hscfgcmd = result;
  51
  52         if (priv->btmrvl_dev.hscfgcmd) {
  53                 btmrvl_prepare_command(priv);
  54                 wake_up_interruptible(&priv->main_thread.wait_q);
  55         }
  56
  57         return count;
  58 }
  59
  60 static ssize_t btmrvl_hscfgcmd_read(struct file *file, char __user *userbuf,
  61                                                 size_t count, loff_t *ppos)
  62 {
  63         struct btmrvl_private *priv = file->private_data;
  64         char buf[16];
  65         int ret;
  66
  67         ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
  68                                                 priv->btmrvl_dev.hscfgcmd);
  69
  70         return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
  71 }
  72
  73 static const struct file_operations btmrvl_hscfgcmd_fops = {
  74         .read   = btmrvl_hscfgcmd_read,
  75         .write  = btmrvl_hscfgcmd_write,
  76         .open   = simple_open,
  77         .llseek = default_llseek,
  78 };
  79
  80 static ssize_t btmrvl_pscmd_write(struct file *file, const char __user *ubuf,
  81                                                 size_t count, loff_t *ppos)
  82 {
  83         struct btmrvl_private *priv = file->private_data;
  84         char buf[16];
  85         long result, ret;
  86
  87         memset(buf, 0, sizeof(buf));
  88
  89         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
  90                 return -EFAULT;
  91
  92         ret = kstrtol(buf, 10, &result);
  93         if (ret)
  94                 return ret;
  95
  96         priv->btmrvl_dev.pscmd = result;
  97
  98         if (priv->btmrvl_dev.pscmd) {
  99                 btmrvl_prepare_command(priv);
 100                 wake_up_interruptible(&priv->main_thread.wait_q);
 101         }
 102
 103         return count;
 104
 105 }
 106
 107 static ssize_t btmrvl_pscmd_read(struct file *file, char __user *userbuf,
 108                                                 size_t count, loff_t *ppos)
 109 {
 110         struct btmrvl_private *priv = file->private_data;
 111         char buf[16];
 112         int ret;
 113
 114         ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->btmrvl_dev.pscmd);
 115
 116         return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
 117 }
 118
 119 static const struct file_operations btmrvl_pscmd_fops = {
 120         .read = btmrvl_pscmd_read,
 121         .write = btmrvl_pscmd_write,
 122         .open = simple_open,
 123         .llseek = default_llseek,
 124 };
 125
 126 static ssize_t btmrvl_hscmd_write(struct file *file, const char __user *ubuf,
 127                                                 size_t count, loff_t *ppos)
 128 {
 129         struct btmrvl_private *priv = file->private_data;
 130         char buf[16];
 131         long result, ret;
 132
 133         memset(buf, 0, sizeof(buf));
 134
 135         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 136                 return -EFAULT;
 137
 138         ret = kstrtol(buf, 10, &result);
 139         if (ret)
 140                 return ret;
 141
 142         priv->btmrvl_dev.hscmd = result;
 143         if (priv->btmrvl_dev.hscmd) {
 144                 btmrvl_prepare_command(priv);
 145                 wake_up_interruptible(&priv->main_thread.wait_q);
 146         }
 147
 148         return count;
 149 }
 150
 151 static ssize_t btmrvl_hscmd_read(struct file *file, char __user *userbuf,
 152                                                 size_t count, loff_t *ppos)
 153 {
 154         struct btmrvl_private *priv = file->private_data;
 155         char buf[16];
 156         int ret;
 157
 158         ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->btmrvl_dev.hscmd);
 159
 160         return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
 161 }
 162
 163 static const struct file_operations btmrvl_hscmd_fops = {
 164         .read   = btmrvl_hscmd_read,
 165         .write  = btmrvl_hscmd_write,
 166         .open   = simple_open,
 167         .llseek = default_llseek,
 168 };
 169
 170 static ssize_t btmrvl_fwdump_write(struct file *file, const char __user *ubuf,
 171                                    size_t count, loff_t *ppos)
 172 {
 173         struct btmrvl_private *priv = file->private_data;
 174         char buf[16];
 175         bool result;
 176
 177         memset(buf, 0, sizeof(buf));
 178
 179         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 180                 return -EFAULT;
 181
 182         if (strtobool(buf, &result))
 183                 return -EINVAL;
 184
 185         if (!result)
 186                 return -EINVAL;
 187
 188         btmrvl_firmware_dump(priv);
 189
 190         return count;
 191 }
 192
 193 static const struct file_operations btmrvl_fwdump_fops = {
 194         .write  = btmrvl_fwdump_write,
 195         .open   = simple_open,
 196         .llseek = default_llseek,
 197 };
 198
 199 void btmrvl_debugfs_init(struct hci_dev *hdev)
 200 {
 201         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 202         struct btmrvl_debugfs_data *dbg;
 203
 204         if (!hdev->debugfs)
 205                 return;
 206
 207         dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
 208         priv->debugfs_data = dbg;
 209
 210         if (!dbg) {
 211                 BT_ERR("Can not allocate memory for btmrvl_debugfs_data.");
 212                 return;
 213         }
 214
 215         dbg->config_dir = debugfs_create_dir("config", hdev->debugfs);
 216
 217         debugfs_create_u8("psmode", 0644, dbg->config_dir,
 218                           &priv->btmrvl_dev.psmode);
 219         debugfs_create_file("pscmd", 0644, dbg->config_dir,
 220                             priv, &btmrvl_pscmd_fops);
 221         debugfs_create_x16("gpiogap", 0644, dbg->config_dir,
 222                            &priv->btmrvl_dev.gpio_gap);
 223         debugfs_create_u8("hsmode", 0644, dbg->config_dir,
 224                           &priv->btmrvl_dev.hsmode);
 225         debugfs_create_file("hscmd", 0644, dbg->config_dir,
 226                             priv, &btmrvl_hscmd_fops);
 227         debugfs_create_file("hscfgcmd", 0644, dbg->config_dir,
 228                             priv, &btmrvl_hscfgcmd_fops);
 229         debugfs_create_file("fw_dump", 0200, dbg->config_dir,
 230                             priv, &btmrvl_fwdump_fops);
 231
 232         dbg->status_dir = debugfs_create_dir("status", hdev->debugfs);
 233         debugfs_create_u8("curpsmode", 0444, dbg->status_dir,
 234                           &priv->adapter->psmode);
 235         debugfs_create_u8("psstate", 0444, dbg->status_dir,
 236                           &priv->adapter->ps_state);
 237         debugfs_create_u8("hsstate", 0444, dbg->status_dir,
 238                           &priv->adapter->hs_state);
 239         debugfs_create_u8("txdnldready", 0444, dbg->status_dir,
 240                           &priv->btmrvl_dev.tx_dnld_rdy);
 241 }
 242
 243 void btmrvl_debugfs_remove(struct hci_dev *hdev)
 244 {
 245         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 246         struct btmrvl_debugfs_data *dbg = priv->debugfs_data;
 247
 248         if (!dbg)
 249                 return;
 250
 251         debugfs_remove_recursive(dbg->config_dir);
 252         debugfs_remove_recursive(dbg->status_dir);
 253
 254         kfree(dbg);
 255 }