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
 27static 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
 51static 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
 92static 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
 98static 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 (kstrtou32(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
134static 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
153void 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
168void 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 */