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 }
207