1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Marvell Bluetooth driver: debugfs related functions
4 *
5 * Copyright (C) 2009, Marvell International Ltd.
6 **/
7
8#include <linux/debugfs.h>
9#include <linux/slab.h>
10
11#include <net/bluetooth/bluetooth.h>
12#include <net/bluetooth/hci_core.h>
13
14#include "btmrvl_drv.h"
15
16struct btmrvl_debugfs_data {
17 struct dentry *config_dir;
18 struct dentry *status_dir;
19};
20
21static ssize_t btmrvl_hscfgcmd_write(struct file *file,
22 const char __user *ubuf, size_t count, loff_t *ppos)
23{
24 struct btmrvl_private *priv = file->private_data;
25 long result, ret;
26
27 ret = kstrtol_from_user(s: ubuf, count, base: 10, res: &result);
28 if (ret)
29 return ret;
30
31 priv->btmrvl_dev.hscfgcmd = result;
32
33 if (priv->btmrvl_dev.hscfgcmd) {
34 btmrvl_prepare_command(priv);
35 wake_up_interruptible(&priv->main_thread.wait_q);
36 }
37
38 return count;
39}
40
41static ssize_t btmrvl_hscfgcmd_read(struct file *file, char __user *userbuf,
42 size_t count, loff_t *ppos)
43{
44 struct btmrvl_private *priv = file->private_data;
45 char buf[16];
46 int ret;
47
48 ret = snprintf(buf, size: sizeof(buf) - 1, fmt: "%d\n",
49 priv->btmrvl_dev.hscfgcmd);
50
51 return simple_read_from_buffer(to: userbuf, count, ppos, from: buf, available: ret);
52}
53
54static const struct file_operations btmrvl_hscfgcmd_fops = {
55 .read = btmrvl_hscfgcmd_read,
56 .write = btmrvl_hscfgcmd_write,
57 .open = simple_open,
58 .llseek = default_llseek,
59};
60
61static ssize_t btmrvl_pscmd_write(struct file *file, const char __user *ubuf,
62 size_t count, loff_t *ppos)
63{
64 struct btmrvl_private *priv = file->private_data;
65 long result, ret;
66
67 ret = kstrtol_from_user(s: ubuf, count, base: 10, res: &result);
68 if (ret)
69 return ret;
70
71 priv->btmrvl_dev.pscmd = result;
72
73 if (priv->btmrvl_dev.pscmd) {
74 btmrvl_prepare_command(priv);
75 wake_up_interruptible(&priv->main_thread.wait_q);
76 }
77
78 return count;
79
80}
81
82static ssize_t btmrvl_pscmd_read(struct file *file, char __user *userbuf,
83 size_t count, loff_t *ppos)
84{
85 struct btmrvl_private *priv = file->private_data;
86 char buf[16];
87 int ret;
88
89 ret = snprintf(buf, size: sizeof(buf) - 1, fmt: "%d\n", priv->btmrvl_dev.pscmd);
90
91 return simple_read_from_buffer(to: userbuf, count, ppos, from: buf, available: ret);
92}
93
94static const struct file_operations btmrvl_pscmd_fops = {
95 .read = btmrvl_pscmd_read,
96 .write = btmrvl_pscmd_write,
97 .open = simple_open,
98 .llseek = default_llseek,
99};
100
101static ssize_t btmrvl_hscmd_write(struct file *file, const char __user *ubuf,
102 size_t count, loff_t *ppos)
103{
104 struct btmrvl_private *priv = file->private_data;
105 long result, ret;
106
107 ret = kstrtol_from_user(s: ubuf, count, base: 10, res: &result);
108 if (ret)
109 return ret;
110
111 priv->btmrvl_dev.hscmd = result;
112 if (priv->btmrvl_dev.hscmd) {
113 btmrvl_prepare_command(priv);
114 wake_up_interruptible(&priv->main_thread.wait_q);
115 }
116
117 return count;
118}
119
120static ssize_t btmrvl_hscmd_read(struct file *file, char __user *userbuf,
121 size_t count, loff_t *ppos)
122{
123 struct btmrvl_private *priv = file->private_data;
124 char buf[16];
125 int ret;
126
127 ret = snprintf(buf, size: sizeof(buf) - 1, fmt: "%d\n", priv->btmrvl_dev.hscmd);
128
129 return simple_read_from_buffer(to: userbuf, count, ppos, from: buf, available: ret);
130}
131
132static const struct file_operations btmrvl_hscmd_fops = {
133 .read = btmrvl_hscmd_read,
134 .write = btmrvl_hscmd_write,
135 .open = simple_open,
136 .llseek = default_llseek,
137};
138
139void btmrvl_debugfs_init(struct hci_dev *hdev)
140{
141 struct btmrvl_private *priv = hci_get_drvdata(hdev);
142 struct btmrvl_debugfs_data *dbg;
143
144 if (!hdev->debugfs)
145 return;
146
147 dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
148 priv->debugfs_data = dbg;
149
150 if (!dbg) {
151 BT_ERR("Can not allocate memory for btmrvl_debugfs_data.");
152 return;
153 }
154
155 dbg->config_dir = debugfs_create_dir(name: "config", parent: hdev->debugfs);
156
157 debugfs_create_u8(name: "psmode", mode: 0644, parent: dbg->config_dir,
158 value: &priv->btmrvl_dev.psmode);
159 debugfs_create_file("pscmd", 0644, dbg->config_dir,
160 priv, &btmrvl_pscmd_fops);
161 debugfs_create_x16(name: "gpiogap", mode: 0644, parent: dbg->config_dir,
162 value: &priv->btmrvl_dev.gpio_gap);
163 debugfs_create_u8(name: "hsmode", mode: 0644, parent: dbg->config_dir,
164 value: &priv->btmrvl_dev.hsmode);
165 debugfs_create_file("hscmd", 0644, dbg->config_dir,
166 priv, &btmrvl_hscmd_fops);
167 debugfs_create_file("hscfgcmd", 0644, dbg->config_dir,
168 priv, &btmrvl_hscfgcmd_fops);
169
170 dbg->status_dir = debugfs_create_dir(name: "status", parent: hdev->debugfs);
171 debugfs_create_u8(name: "curpsmode", mode: 0444, parent: dbg->status_dir,
172 value: &priv->adapter->psmode);
173 debugfs_create_u8(name: "psstate", mode: 0444, parent: dbg->status_dir,
174 value: &priv->adapter->ps_state);
175 debugfs_create_u8(name: "hsstate", mode: 0444, parent: dbg->status_dir,
176 value: &priv->adapter->hs_state);
177 debugfs_create_u8(name: "txdnldready", mode: 0444, parent: dbg->status_dir,
178 value: &priv->btmrvl_dev.tx_dnld_rdy);
179}
180
181void btmrvl_debugfs_remove(struct hci_dev *hdev)
182{
183 struct btmrvl_private *priv = hci_get_drvdata(hdev);
184 struct btmrvl_debugfs_data *dbg = priv->debugfs_data;
185
186 if (!dbg)
187 return;
188
189 debugfs_remove_recursive(dentry: dbg->config_dir);
190 debugfs_remove_recursive(dentry: dbg->status_dir);
191
192 kfree(objp: dbg);
193}
194

source code of linux/drivers/bluetooth/btmrvl_debugfs.c