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 }
256