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 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 = container_of((void *)vif_priv, 37 struct ieee80211_vif, 38 drv_priv); 39 if (NL80211_IFTYPE_STATION == vif->type) { 40 if (vif_priv->pw_state == WCN36XX_BMPS) 41 buf[0] = '1'; 42 else 43 buf[0] = '0'; 44 break; 45 } 46 } 47 buf[1] = '\n'; 48 buf[2] = 0x00; 49 50 return simple_read_from_buffer(user_buf, count, ppos, buf, 2); 51 } 52 53 static ssize_t write_file_bool_bmps(struct file *file, 54 const char __user *user_buf, 55 size_t count, loff_t *ppos) 56 { 57 struct wcn36xx *wcn = file->private_data; 58 struct wcn36xx_vif *vif_priv = NULL; 59 struct ieee80211_vif *vif = NULL; 60 61 char buf[32]; 62 int buf_size; 63 64 buf_size = min(count, (sizeof(buf)-1)); 65 if (copy_from_user(buf, user_buf, buf_size)) 66 return -EFAULT; 67 68 switch (buf[0]) { 69 case 'y': 70 case 'Y': 71 case '1': 72 list_for_each_entry(vif_priv, &wcn->vif_list, list) { 73 vif = container_of((void *)vif_priv, 74 struct ieee80211_vif, 75 drv_priv); 76 if (NL80211_IFTYPE_STATION == vif->type) { 77 wcn36xx_enable_keep_alive_null_packet(wcn, vif); 78 wcn36xx_pmc_enter_bmps_state(wcn, vif); 79 } 80 } 81 break; 82 case 'n': 83 case 'N': 84 case '0': 85 list_for_each_entry(vif_priv, &wcn->vif_list, list) { 86 vif = container_of((void *)vif_priv, 87 struct ieee80211_vif, 88 drv_priv); 89 if (NL80211_IFTYPE_STATION == vif->type) 90 wcn36xx_pmc_exit_bmps_state(wcn, vif); 91 } 92 break; 93 } 94 95 return count; 96 } 97 98 static const struct file_operations fops_wcn36xx_bmps = { 99 .open = simple_open, 100 .read = read_file_bool_bmps, 101 .write = write_file_bool_bmps, 102 }; 103 104 static ssize_t write_file_dump(struct file *file, 105 const char __user *user_buf, 106 size_t count, loff_t *ppos) 107 { 108 struct wcn36xx *wcn = file->private_data; 109 char buf[255], *tmp; 110 int buf_size; 111 u32 arg[WCN36xx_MAX_DUMP_ARGS]; 112 int i; 113 114 memset(buf, 0, sizeof(buf)); 115 memset(arg, 0, sizeof(arg)); 116 117 buf_size = min(count, (sizeof(buf) - 1)); 118 if (copy_from_user(buf, user_buf, buf_size)) 119 return -EFAULT; 120 121 tmp = buf; 122 123 for (i = 0; i < WCN36xx_MAX_DUMP_ARGS; i++) { 124 char *begin; 125 begin = strsep(&tmp, " "); 126 if (begin == NULL) 127 break; 128 129 if (kstrtou32(begin, 0, &arg[i]) != 0) 130 break; 131 } 132 133 wcn36xx_info("DUMP args is %d %d %d %d %d\n", arg[0], arg[1], arg[2], 134 arg[3], arg[4]); 135 wcn36xx_smd_dump_cmd_req(wcn, arg[0], arg[1], arg[2], arg[3], arg[4]); 136 137 return count; 138 } 139 140 static const struct file_operations fops_wcn36xx_dump = { 141 .open = simple_open, 142 .write = write_file_dump, 143 }; 144 145 #define ADD_FILE(name, mode, fop, priv_data) \ 146 do { \ 147 struct dentry *d; \ 148 d = debugfs_create_file(__stringify(name), \ 149 mode, dfs->rootdir, \ 150 priv_data, fop); \ 151 dfs->file_##name.dentry = d; \ 152 if (IS_ERR(d)) { \ 153 wcn36xx_warn("Create the debugfs entry failed");\ 154 dfs->file_##name.dentry = NULL; \ 155 } \ 156 } while (0) 157 158 159 void wcn36xx_debugfs_init(struct wcn36xx *wcn) 160 { 161 struct wcn36xx_dfs_entry *dfs = &wcn->dfs; 162 163 dfs->rootdir = debugfs_create_dir(KBUILD_MODNAME, 164 wcn->hw->wiphy->debugfsdir); 165 if (IS_ERR(dfs->rootdir)) { 166 wcn36xx_warn("Create the debugfs failed\n"); 167 dfs->rootdir = NULL; 168 } 169 170 ADD_FILE(bmps_switcher, S_IRUSR | S_IWUSR, 171 &fops_wcn36xx_bmps, wcn); 172 ADD_FILE(dump, S_IWUSR, &fops_wcn36xx_dump, wcn); 173 } 174 175 void wcn36xx_debugfs_exit(struct wcn36xx *wcn) 176 { 177 struct wcn36xx_dfs_entry *dfs = &wcn->dfs; 178 debugfs_remove_recursive(dfs->rootdir); 179 } 180 181 #endif /* CONFIG_WCN36XX_DEBUGFS */ 182