1 /*
2 * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19 #include <linux/debugfs.h>
20 #include <linux/uaccess.h>
21 #include "wcn36xx.h"
22 #include "debug.h"
23 #include "pmc.h"
24
25 #ifdef CONFIG_WCN36XX_DEBUGFS
26
read_file_bool_bmps(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)27 static ssize_t read_file_bool_bmps(struct file *file, char __user *user_buf,
28 size_t count, loff_t *ppos)
29 {
30 struct wcn36xx *wcn = file->private_data;
31 struct wcn36xx_vif *vif_priv = NULL;
32 struct ieee80211_vif *vif = NULL;
33 char buf[3];
34
35 list_for_each_entry(vif_priv, &wcn->vif_list, list) {
36 vif = wcn36xx_priv_to_vif(vif_priv);
37 if (NL80211_IFTYPE_STATION == vif->type) {
38 if (vif_priv->pw_state == WCN36XX_BMPS)
39 buf[0] = '1';
40 else
41 buf[0] = '0';
42 break;
43 }
44 }
45 buf[1] = '\n';
46 buf[2] = 0x00;
47
48 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
49 }
50
write_file_bool_bmps(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)51 static ssize_t write_file_bool_bmps(struct file *file,
52 const char __user *user_buf,
53 size_t count, loff_t *ppos)
54 {
55 struct wcn36xx *wcn = file->private_data;
56 struct wcn36xx_vif *vif_priv = NULL;
57 struct ieee80211_vif *vif = NULL;
58
59 char buf[32];
60 int buf_size;
61
62 buf_size = min(count, (sizeof(buf)-1));
63 if (copy_from_user(buf, user_buf, buf_size))
64 return -EFAULT;
65
66 switch (buf[0]) {
67 case 'y':
68 case 'Y':
69 case '1':
70 list_for_each_entry(vif_priv, &wcn->vif_list, list) {
71 vif = wcn36xx_priv_to_vif(vif_priv);
72 if (NL80211_IFTYPE_STATION == vif->type) {
73 wcn36xx_enable_keep_alive_null_packet(wcn, vif);
74 wcn36xx_pmc_enter_bmps_state(wcn, vif);
75 }
76 }
77 break;
78 case 'n':
79 case 'N':
80 case '0':
81 list_for_each_entry(vif_priv, &wcn->vif_list, list) {
82 vif = wcn36xx_priv_to_vif(vif_priv);
83 if (NL80211_IFTYPE_STATION == vif->type)
84 wcn36xx_pmc_exit_bmps_state(wcn, vif);
85 }
86 break;
87 }
88
89 return count;
90 }
91
92 static const struct file_operations fops_wcn36xx_bmps = {
93 .open = simple_open,
94 .read = read_file_bool_bmps,
95 .write = write_file_bool_bmps,
96 };
97
write_file_dump(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)98 static ssize_t write_file_dump(struct file *file,
99 const char __user *user_buf,
100 size_t count, loff_t *ppos)
101 {
102 struct wcn36xx *wcn = file->private_data;
103 char buf[255], *tmp;
104 int buf_size;
105 u32 arg[WCN36xx_MAX_DUMP_ARGS];
106 int i;
107
108 memset(buf, 0, sizeof(buf));
109 memset(arg, 0, sizeof(arg));
110
111 buf_size = min(count, (sizeof(buf) - 1));
112 if (copy_from_user(buf, user_buf, buf_size))
113 return -EFAULT;
114
115 tmp = buf;
116
117 for (i = 0; i < WCN36xx_MAX_DUMP_ARGS; i++) {
118 char *begin;
119 begin = strsep(&tmp, " ");
120 if (begin == NULL)
121 break;
122
123 if (kstrtos32(begin, 0, &arg[i]) != 0)
124 break;
125 }
126
127 wcn36xx_info("DUMP args is %d %d %d %d %d\n", arg[0], arg[1], arg[2],
128 arg[3], arg[4]);
129 wcn36xx_smd_dump_cmd_req(wcn, arg[0], arg[1], arg[2], arg[3], arg[4]);
130
131 return count;
132 }
133
134 static const struct file_operations fops_wcn36xx_dump = {
135 .open = simple_open,
136 .write = write_file_dump,
137 };
138
139 #define ADD_FILE(name, mode, fop, priv_data) \
140 do { \
141 struct dentry *d; \
142 d = debugfs_create_file(__stringify(name), \
143 mode, dfs->rootdir, \
144 priv_data, fop); \
145 dfs->file_##name.dentry = d; \
146 if (IS_ERR(d)) { \
147 wcn36xx_warn("Create the debugfs entry failed");\
148 dfs->file_##name.dentry = NULL; \
149 } \
150 } while (0)
151
152
wcn36xx_debugfs_init(struct wcn36xx * wcn)153 void wcn36xx_debugfs_init(struct wcn36xx *wcn)
154 {
155 struct wcn36xx_dfs_entry *dfs = &wcn->dfs;
156
157 dfs->rootdir = debugfs_create_dir(KBUILD_MODNAME,
158 wcn->hw->wiphy->debugfsdir);
159 if (IS_ERR(dfs->rootdir)) {
160 wcn36xx_warn("Create the debugfs failed\n");
161 dfs->rootdir = NULL;
162 }
163
164 ADD_FILE(bmps_switcher, 0600, &fops_wcn36xx_bmps, wcn);
165 ADD_FILE(dump, 0200, &fops_wcn36xx_dump, wcn);
166 }
167
wcn36xx_debugfs_exit(struct wcn36xx * wcn)168 void wcn36xx_debugfs_exit(struct wcn36xx *wcn)
169 {
170 struct wcn36xx_dfs_entry *dfs = &wcn->dfs;
171 debugfs_remove_recursive(dfs->rootdir);
172 }
173
174 #endif /* CONFIG_WCN36XX_DEBUGFS */
175