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1/*
2 * This file is part of wlcore
3 *
4 * Copyright (C) 2013 Texas Instruments Inc.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18 * 02110-1301 USA
19 *
20 */
21
22#include "wlcore.h"
23#include "debug.h"
24#include "ps.h"
25#include "sysfs.h"
26
27static ssize_t wl1271_sysfs_show_bt_coex_state(struct device *dev,
28 struct device_attribute *attr,
29 char *buf)
30{
31 struct wl1271 *wl = dev_get_drvdata(dev);
32 ssize_t len;
33
34 len = PAGE_SIZE;
35
36 mutex_lock(&wl->mutex);
37 len = snprintf(buf, len, "%d\n\n0 - off\n1 - on\n",
38 wl->sg_enabled);
39 mutex_unlock(&wl->mutex);
40
41 return len;
42
43}
44
45static ssize_t wl1271_sysfs_store_bt_coex_state(struct device *dev,
46 struct device_attribute *attr,
47 const char *buf, size_t count)
48{
49 struct wl1271 *wl = dev_get_drvdata(dev);
50 unsigned long res;
51 int ret;
52
53 ret = kstrtoul(buf, 10, &res);
54 if (ret < 0) {
55 wl1271_warning("incorrect value written to bt_coex_mode");
56 return count;
57 }
58
59 mutex_lock(&wl->mutex);
60
61 res = !!res;
62
63 if (res == wl->sg_enabled)
64 goto out;
65
66 wl->sg_enabled = res;
67
68 if (unlikely(wl->state != WLCORE_STATE_ON))
69 goto out;
70
71 ret = wl1271_ps_elp_wakeup(wl);
72 if (ret < 0)
73 goto out;
74
75 wl1271_acx_sg_enable(wl, wl->sg_enabled);
76 wl1271_ps_elp_sleep(wl);
77
78 out:
79 mutex_unlock(&wl->mutex);
80 return count;
81}
82
83static DEVICE_ATTR(bt_coex_state, 0644,
84 wl1271_sysfs_show_bt_coex_state,
85 wl1271_sysfs_store_bt_coex_state);
86
87static ssize_t wl1271_sysfs_show_hw_pg_ver(struct device *dev,
88 struct device_attribute *attr,
89 char *buf)
90{
91 struct wl1271 *wl = dev_get_drvdata(dev);
92 ssize_t len;
93
94 len = PAGE_SIZE;
95
96 mutex_lock(&wl->mutex);
97 if (wl->hw_pg_ver >= 0)
98 len = snprintf(buf, len, "%d\n", wl->hw_pg_ver);
99 else
100 len = snprintf(buf, len, "n/a\n");
101 mutex_unlock(&wl->mutex);
102
103 return len;
104}
105
106static DEVICE_ATTR(hw_pg_ver, 0444, wl1271_sysfs_show_hw_pg_ver, NULL);
107
108static ssize_t wl1271_sysfs_read_fwlog(struct file *filp, struct kobject *kobj,
109 struct bin_attribute *bin_attr,
110 char *buffer, loff_t pos, size_t count)
111{
112 struct device *dev = container_of(kobj, struct device, kobj);
113 struct wl1271 *wl = dev_get_drvdata(dev);
114 ssize_t len;
115 int ret;
116
117 ret = mutex_lock_interruptible(&wl->mutex);
118 if (ret < 0)
119 return -ERESTARTSYS;
120
121 /* Check if the fwlog is still valid */
122 if (wl->fwlog_size < 0) {
123 mutex_unlock(&wl->mutex);
124 return 0;
125 }
126
127 /* Seeking is not supported - old logs are not kept. Disregard pos. */
128 len = min_t(size_t, count, wl->fwlog_size);
129 wl->fwlog_size -= len;
130 memcpy(buffer, wl->fwlog, len);
131
132 /* Make room for new messages */
133 memmove(wl->fwlog, wl->fwlog + len, wl->fwlog_size);
134
135 mutex_unlock(&wl->mutex);
136
137 return len;
138}
139
140static const struct bin_attribute fwlog_attr = {
141 .attr = { .name = "fwlog", .mode = 0400 },
142 .read = wl1271_sysfs_read_fwlog,
143};
144
145int wlcore_sysfs_init(struct wl1271 *wl)
146{
147 int ret;
148
149 /* Create sysfs file to control bt coex state */
150 ret = device_create_file(wl->dev, &dev_attr_bt_coex_state);
151 if (ret < 0) {
152 wl1271_error("failed to create sysfs file bt_coex_state");
153 goto out;
154 }
155
156 /* Create sysfs file to get HW PG version */
157 ret = device_create_file(wl->dev, &dev_attr_hw_pg_ver);
158 if (ret < 0) {
159 wl1271_error("failed to create sysfs file hw_pg_ver");
160 goto out_bt_coex_state;
161 }
162
163 /* Create sysfs file for the FW log */
164 ret = device_create_bin_file(wl->dev, &fwlog_attr);
165 if (ret < 0) {
166 wl1271_error("failed to create sysfs file fwlog");
167 goto out_hw_pg_ver;
168 }
169
170 goto out;
171
172out_hw_pg_ver:
173 device_remove_file(wl->dev, &dev_attr_hw_pg_ver);
174
175out_bt_coex_state:
176 device_remove_file(wl->dev, &dev_attr_bt_coex_state);
177
178out:
179 return ret;
180}
181
182void wlcore_sysfs_free(struct wl1271 *wl)
183{
184 device_remove_bin_file(wl->dev, &fwlog_attr);
185
186 device_remove_file(wl->dev, &dev_attr_hw_pg_ver);
187
188 device_remove_file(wl->dev, &dev_attr_bt_coex_state);
189}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * This file is part of wlcore
4 *
5 * Copyright (C) 2013 Texas Instruments Inc.
6 */
7
8#include <linux/pm_runtime.h>
9
10#include "acx.h"
11#include "wlcore.h"
12#include "debug.h"
13#include "sysfs.h"
14
15static ssize_t bt_coex_state_show(struct device *dev,
16 struct device_attribute *attr,
17 char *buf)
18{
19 struct wl1271 *wl = dev_get_drvdata(dev);
20 ssize_t len;
21
22 len = PAGE_SIZE;
23
24 mutex_lock(&wl->mutex);
25 len = snprintf(buf, len, "%d\n\n0 - off\n1 - on\n",
26 wl->sg_enabled);
27 mutex_unlock(&wl->mutex);
28
29 return len;
30
31}
32
33static ssize_t bt_coex_state_store(struct device *dev,
34 struct device_attribute *attr,
35 const char *buf, size_t count)
36{
37 struct wl1271 *wl = dev_get_drvdata(dev);
38 unsigned long res;
39 int ret;
40
41 ret = kstrtoul(buf, 10, &res);
42 if (ret < 0) {
43 wl1271_warning("incorrect value written to bt_coex_mode");
44 return count;
45 }
46
47 mutex_lock(&wl->mutex);
48
49 res = !!res;
50
51 if (res == wl->sg_enabled)
52 goto out;
53
54 wl->sg_enabled = res;
55
56 if (unlikely(wl->state != WLCORE_STATE_ON))
57 goto out;
58
59 ret = pm_runtime_resume_and_get(wl->dev);
60 if (ret < 0)
61 goto out;
62
63 wl1271_acx_sg_enable(wl, wl->sg_enabled);
64 pm_runtime_mark_last_busy(wl->dev);
65 pm_runtime_put_autosuspend(wl->dev);
66
67 out:
68 mutex_unlock(&wl->mutex);
69 return count;
70}
71
72static DEVICE_ATTR_RW(bt_coex_state);
73
74static ssize_t hw_pg_ver_show(struct device *dev,
75 struct device_attribute *attr,
76 char *buf)
77{
78 struct wl1271 *wl = dev_get_drvdata(dev);
79 ssize_t len;
80
81 len = PAGE_SIZE;
82
83 mutex_lock(&wl->mutex);
84 if (wl->hw_pg_ver >= 0)
85 len = snprintf(buf, len, "%d\n", wl->hw_pg_ver);
86 else
87 len = snprintf(buf, len, "n/a\n");
88 mutex_unlock(&wl->mutex);
89
90 return len;
91}
92
93static DEVICE_ATTR_RO(hw_pg_ver);
94
95static ssize_t wl1271_sysfs_read_fwlog(struct file *filp, struct kobject *kobj,
96 struct bin_attribute *bin_attr,
97 char *buffer, loff_t pos, size_t count)
98{
99 struct device *dev = kobj_to_dev(kobj);
100 struct wl1271 *wl = dev_get_drvdata(dev);
101 ssize_t len;
102 int ret;
103
104 ret = mutex_lock_interruptible(&wl->mutex);
105 if (ret < 0)
106 return -ERESTARTSYS;
107
108 /* Check if the fwlog is still valid */
109 if (wl->fwlog_size < 0) {
110 mutex_unlock(&wl->mutex);
111 return 0;
112 }
113
114 /* Seeking is not supported - old logs are not kept. Disregard pos. */
115 len = min_t(size_t, count, wl->fwlog_size);
116 wl->fwlog_size -= len;
117 memcpy(buffer, wl->fwlog, len);
118
119 /* Make room for new messages */
120 memmove(wl->fwlog, wl->fwlog + len, wl->fwlog_size);
121
122 mutex_unlock(&wl->mutex);
123
124 return len;
125}
126
127static const struct bin_attribute fwlog_attr = {
128 .attr = { .name = "fwlog", .mode = 0400 },
129 .read = wl1271_sysfs_read_fwlog,
130};
131
132int wlcore_sysfs_init(struct wl1271 *wl)
133{
134 int ret;
135
136 /* Create sysfs file to control bt coex state */
137 ret = device_create_file(wl->dev, &dev_attr_bt_coex_state);
138 if (ret < 0) {
139 wl1271_error("failed to create sysfs file bt_coex_state");
140 goto out;
141 }
142
143 /* Create sysfs file to get HW PG version */
144 ret = device_create_file(wl->dev, &dev_attr_hw_pg_ver);
145 if (ret < 0) {
146 wl1271_error("failed to create sysfs file hw_pg_ver");
147 goto out_bt_coex_state;
148 }
149
150 /* Create sysfs file for the FW log */
151 ret = device_create_bin_file(wl->dev, &fwlog_attr);
152 if (ret < 0) {
153 wl1271_error("failed to create sysfs file fwlog");
154 goto out_hw_pg_ver;
155 }
156
157 goto out;
158
159out_hw_pg_ver:
160 device_remove_file(wl->dev, &dev_attr_hw_pg_ver);
161
162out_bt_coex_state:
163 device_remove_file(wl->dev, &dev_attr_bt_coex_state);
164
165out:
166 return ret;
167}
168
169void wlcore_sysfs_free(struct wl1271 *wl)
170{
171 device_remove_bin_file(wl->dev, &fwlog_attr);
172
173 device_remove_file(wl->dev, &dev_attr_hw_pg_ver);
174
175 device_remove_file(wl->dev, &dev_attr_bt_coex_state);
176}