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
bt_coex_state_show(struct device * dev,struct device_attribute * attr,char * buf)15 static 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
bt_coex_state_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)33 static 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
72 static DEVICE_ATTR_RW(bt_coex_state);
73
hw_pg_ver_show(struct device * dev,struct device_attribute * attr,char * buf)74 static 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
93 static DEVICE_ATTR_RO(hw_pg_ver);
94
wl1271_sysfs_read_fwlog(struct file * filp,struct kobject * kobj,struct bin_attribute * bin_attr,char * buffer,loff_t pos,size_t count)95 static 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
127 static const struct bin_attribute fwlog_attr = {
128 .attr = { .name = "fwlog", .mode = 0400 },
129 .read = wl1271_sysfs_read_fwlog,
130 };
131
wlcore_sysfs_init(struct wl1271 * wl)132 int 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
159 out_hw_pg_ver:
160 device_remove_file(wl->dev, &dev_attr_hw_pg_ver);
161
162 out_bt_coex_state:
163 device_remove_file(wl->dev, &dev_attr_bt_coex_state);
164
165 out:
166 return ret;
167 }
168
wlcore_sysfs_free(struct wl1271 * wl)169 void 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 }
177