/**
   * Marvell Bluetooth driver: debugfs related functions
   *
   * Copyright (C) 2009, Marvell International Ltd.
   *
   * This software file (the "File") is distributed by Marvell International
   * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   * (the "License").  You may use, redistribute and/or modify this File in
   * accordance with the terms and conditions of the License, a copy of which
   * is available by writing to the Free Software Foundation, Inc.,
   * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
   * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
   *
   *
   * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
   * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
   * this warranty disclaimer.
   **/
  
  #include <linux/debugfs.h>
  #include <linux/slab.h>
  
  #include <net/bluetooth/bluetooth.h>
  #include <net/bluetooth/hci_core.h>
  
  #include "btmrvl_drv.h"
  
  struct btmrvl_debugfs_data {
  	struct dentry *config_dir;
  	struct dentry *status_dir;
  };
  
  static ssize_t btmrvl_hscfgcmd_write(struct file *file,
  			const char __user *ubuf, size_t count, loff_t *ppos)
  {
  	struct btmrvl_private *priv = file->private_data;
  	char buf[16];
  	long result, ret;
  
  	memset(buf, 0, sizeof(buf));
  
  	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
  		return -EFAULT;
  
  	ret = kstrtol(buf, 10, &result);
  	if (ret)
  		return ret;
  
  	priv->btmrvl_dev.hscfgcmd = result;
  
  	if (priv->btmrvl_dev.hscfgcmd) {
  		btmrvl_prepare_command(priv);
  		wake_up_interruptible(&priv->main_thread.wait_q);
  	}
  
  	return count;
  }
  
  static ssize_t btmrvl_hscfgcmd_read(struct file *file, char __user *userbuf,
  						size_t count, loff_t *ppos)
  {
  	struct btmrvl_private *priv = file->private_data;
  	char buf[16];
  	int ret;
  
  	ret = snprintf(buf, sizeof(buf) - 1, "%d
  ",
  						priv->btmrvl_dev.hscfgcmd);
  
  	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
  }
  
  static const struct file_operations btmrvl_hscfgcmd_fops = {
  	.read	= btmrvl_hscfgcmd_read,
  	.write	= btmrvl_hscfgcmd_write,
  	.open	= simple_open,
  	.llseek = default_llseek,
  };
  
  static ssize_t btmrvl_pscmd_write(struct file *file, const char __user *ubuf,
  						size_t count, loff_t *ppos)
  {
  	struct btmrvl_private *priv = file->private_data;
  	char buf[16];
  	long result, ret;
  
  	memset(buf, 0, sizeof(buf));
  
  	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
  		return -EFAULT;
  
  	ret = kstrtol(buf, 10, &result);
  	if (ret)
  		return ret;
  
  	priv->btmrvl_dev.pscmd = result;
  
  	if (priv->btmrvl_dev.pscmd) {
  		btmrvl_prepare_command(priv);
  		wake_up_interruptible(&priv->main_thread.wait_q);
  	}
  
  	return count;
  
  }
  
  static ssize_t btmrvl_pscmd_read(struct file *file, char __user *userbuf,
  						size_t count, loff_t *ppos)
  {
  	struct btmrvl_private *priv = file->private_data;
  	char buf[16];
  	int ret;
  
  	ret = snprintf(buf, sizeof(buf) - 1, "%d
  ", priv->btmrvl_dev.pscmd);
  
  	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
  }
  
  static const struct file_operations btmrvl_pscmd_fops = {
  	.read = btmrvl_pscmd_read,
  	.write = btmrvl_pscmd_write,
  	.open = simple_open,
  	.llseek = default_llseek,
  };
  
  static ssize_t btmrvl_hscmd_write(struct file *file, const char __user *ubuf,
  						size_t count, loff_t *ppos)
  {
  	struct btmrvl_private *priv = file->private_data;
  	char buf[16];
  	long result, ret;
  
  	memset(buf, 0, sizeof(buf));
  
  	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
  		return -EFAULT;
  
  	ret = kstrtol(buf, 10, &result);
  	if (ret)
  		return ret;
  
  	priv->btmrvl_dev.hscmd = result;
  	if (priv->btmrvl_dev.hscmd) {
  		btmrvl_prepare_command(priv);
  		wake_up_interruptible(&priv->main_thread.wait_q);
  	}
  
  	return count;
  }
  
  static ssize_t btmrvl_hscmd_read(struct file *file, char __user *userbuf,
  						size_t count, loff_t *ppos)
  {
  	struct btmrvl_private *priv = file->private_data;
  	char buf[16];
  	int ret;
  
  	ret = snprintf(buf, sizeof(buf) - 1, "%d
  ", priv->btmrvl_dev.hscmd);
  
  	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
  }
  
  static const struct file_operations btmrvl_hscmd_fops = {
  	.read	= btmrvl_hscmd_read,
  	.write	= btmrvl_hscmd_write,
  	.open	= simple_open,
  	.llseek = default_llseek,
  };
  
  void btmrvl_debugfs_init(struct hci_dev *hdev)
  {
  	struct btmrvl_private *priv = hci_get_drvdata(hdev);
  	struct btmrvl_debugfs_data *dbg;
  
  	if (!hdev->debugfs)
  		return;
  
  	dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
  	priv->debugfs_data = dbg;
  
  	if (!dbg) {
  		BT_ERR("Can not allocate memory for btmrvl_debugfs_data.");
  		return;
  	}
  
  	dbg->config_dir = debugfs_create_dir("config", hdev->debugfs);
  
  	debugfs_create_u8("psmode", 0644, dbg->config_dir,
  			  &priv->btmrvl_dev.psmode);
  	debugfs_create_file("pscmd", 0644, dbg->config_dir,
  			    priv, &btmrvl_pscmd_fops);
  	debugfs_create_x16("gpiogap", 0644, dbg->config_dir,
  			   &priv->btmrvl_dev.gpio_gap);
  	debugfs_create_u8("hsmode", 0644, dbg->config_dir,
  			  &priv->btmrvl_dev.hsmode);
  	debugfs_create_file("hscmd", 0644, dbg->config_dir,
  			    priv, &btmrvl_hscmd_fops);
  	debugfs_create_file("hscfgcmd", 0644, dbg->config_dir,
  			    priv, &btmrvl_hscfgcmd_fops);
  
  	dbg->status_dir = debugfs_create_dir("status", hdev->debugfs);
  	debugfs_create_u8("curpsmode", 0444, dbg->status_dir,
  			  &priv->adapter->psmode);
  	debugfs_create_u8("psstate", 0444, dbg->status_dir,
  			  &priv->adapter->ps_state);
  	debugfs_create_u8("hsstate", 0444, dbg->status_dir,
  			  &priv->adapter->hs_state);
  	debugfs_create_u8("txdnldready", 0444, dbg->status_dir,
  			  &priv->btmrvl_dev.tx_dnld_rdy);
  }
  
  void btmrvl_debugfs_remove(struct hci_dev *hdev)
  {
  	struct btmrvl_private *priv = hci_get_drvdata(hdev);
  	struct btmrvl_debugfs_data *dbg = priv->debugfs_data;
  
  	if (!dbg)
  		return;
  
  	debugfs_remove_recursive(dbg->config_dir);
  	debugfs_remove_recursive(dbg->status_dir);
  
  	kfree(dbg);
  }