linux/drivers/bluetooth/btmrvl_debugfs.c
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   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
  29struct btmrvl_debugfs_data {
  30        struct dentry *config_dir;
  31        struct dentry *status_dir;
  32};
  33
  34static 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 = strict_strtol(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
  60static 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
  73static 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
  80static 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 = strict_strtol(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
 107static 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
 119static 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
 126static 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 = strict_strtol(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
 151static 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
 163static 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
 170void btmrvl_debugfs_init(struct hci_dev *hdev)
 171{
 172        struct btmrvl_private *priv = hci_get_drvdata(hdev);
 173        struct btmrvl_debugfs_data *dbg;
 174
 175        if (!hdev->debugfs)
 176                return;
 177
 178        dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
 179        priv->debugfs_data = dbg;
 180
 181        if (!dbg) {
 182                BT_ERR("Can not allocate memory for btmrvl_debugfs_data.");
 183                return;
 184        }
 185
 186        dbg->config_dir = debugfs_create_dir("config", hdev->debugfs);
 187
 188        debugfs_create_u8("psmode", 0644, dbg->config_dir,
 189                          &priv->btmrvl_dev.psmode);
 190        debugfs_create_file("pscmd", 0644, dbg->config_dir,
 191                            priv, &btmrvl_pscmd_fops);
 192        debugfs_create_x16("gpiogap", 0644, dbg->config_dir,
 193                           &priv->btmrvl_dev.gpio_gap);
 194        debugfs_create_u8("hsmode", 0644, dbg->config_dir,
 195                          &priv->btmrvl_dev.hsmode);
 196        debugfs_create_file("hscmd", 0644, dbg->config_dir,
 197                            priv, &btmrvl_hscmd_fops);
 198        debugfs_create_file("hscfgcmd", 0644, dbg->config_dir,
 199                            priv, &btmrvl_hscfgcmd_fops);
 200
 201        dbg->status_dir = debugfs_create_dir("status", hdev->debugfs);
 202        debugfs_create_u8("curpsmode", 0444, dbg->status_dir,
 203                          &priv->adapter->psmode);
 204        debugfs_create_u8("psstate", 0444, dbg->status_dir,
 205                          &priv->adapter->ps_state);
 206        debugfs_create_u8("hsstate", 0444, dbg->status_dir,
 207                          &priv->adapter->hs_state);
 208        debugfs_create_u8("txdnldready", 0444, dbg->status_dir,
 209                          &priv->btmrvl_dev.tx_dnld_rdy);
 210}
 211
 212void btmrvl_debugfs_remove(struct hci_dev *hdev)
 213{
 214        struct btmrvl_private *priv = hci_get_drvdata(hdev);
 215        struct btmrvl_debugfs_data *dbg = priv->debugfs_data;
 216
 217        if (!dbg)
 218                return;
 219
 220        debugfs_remove_recursive(dbg->config_dir);
 221        debugfs_remove_recursive(dbg->status_dir);
 222
 223        kfree(dbg);
 224}
 225
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