src/kernel/linux/v4.19/drivers/bluetooth/btmrvl_debugfs.c

/**
 * 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;
	long result, ret;

	ret = kstrtol_from_user(ubuf, count, 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\n",
						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;
	long result, ret;

	ret = kstrtol_from_user(ubuf, count, 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\n", 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;
	long result, ret;

	ret = kstrtol_from_user(ubuf, count, 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\n", 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);
}