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 = 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 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 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) 151 152 153 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 } 167 168 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