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 mutex_lock(&wl->mutex);
23 len = sysfs_emit(buf, "%d\n\n0 - off\n1 - on\n", wl->sg_enabled);
24 mutex_unlock(&wl->mutex);
25
26 return len;
27
28 }
29
bt_coex_state_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)30 static ssize_t bt_coex_state_store(struct device *dev,
31 struct device_attribute *attr,
32 const char *buf, size_t count)
33 {
34 struct wl1271 *wl = dev_get_drvdata(dev);
35 unsigned long res;
36 int ret;
37
38 ret = kstrtoul(buf, 10, &res);
39 if (ret < 0) {
40 wl1271_warning("incorrect value written to bt_coex_mode");
41 return count;
42 }
43
44 mutex_lock(&wl->mutex);
45
46 res = !!res;
47
48 if (res == wl->sg_enabled)
49 goto out;
50
51 wl->sg_enabled = res;
52
53 if (unlikely(wl->state != WLCORE_STATE_ON))
54 goto out;
55
56 ret = pm_runtime_resume_and_get(wl->dev);
57 if (ret < 0)
58 goto out;
59
60 wl1271_acx_sg_enable(wl, wl->sg_enabled);
61 pm_runtime_mark_last_busy(wl->dev);
62 pm_runtime_put_autosuspend(wl->dev);
63
64 out:
65 mutex_unlock(&wl->mutex);
66 return count;
67 }
68
69 static DEVICE_ATTR_RW(bt_coex_state);
70
hw_pg_ver_show(struct device * dev,struct device_attribute * attr,char * buf)71 static ssize_t hw_pg_ver_show(struct device *dev,
72 struct device_attribute *attr,
73 char *buf)
74 {
75 struct wl1271 *wl = dev_get_drvdata(dev);
76 ssize_t len;
77
78 mutex_lock(&wl->mutex);
79 if (wl->hw_pg_ver >= 0)
80 len = sysfs_emit(buf, "%d\n", wl->hw_pg_ver);
81 else
82 len = sysfs_emit(buf, "n/a\n");
83 mutex_unlock(&wl->mutex);
84
85 return len;
86 }
87
88 static DEVICE_ATTR_RO(hw_pg_ver);
89
wl1271_sysfs_read_fwlog(struct file * filp,struct kobject * kobj,struct bin_attribute * bin_attr,char * buffer,loff_t pos,size_t count)90 static ssize_t wl1271_sysfs_read_fwlog(struct file *filp, struct kobject *kobj,
91 struct bin_attribute *bin_attr,
92 char *buffer, loff_t pos, size_t count)
93 {
94 struct device *dev = kobj_to_dev(kobj);
95 struct wl1271 *wl = dev_get_drvdata(dev);
96 ssize_t len;
97 int ret;
98
99 ret = mutex_lock_interruptible(&wl->mutex);
100 if (ret < 0)
101 return -ERESTARTSYS;
102
103 /* Check if the fwlog is still valid */
104 if (wl->fwlog_size < 0) {
105 mutex_unlock(&wl->mutex);
106 return 0;
107 }
108
109 /* Seeking is not supported - old logs are not kept. Disregard pos. */
110 len = min_t(size_t, count, wl->fwlog_size);
111 wl->fwlog_size -= len;
112 memcpy(buffer, wl->fwlog, len);
113
114 /* Make room for new messages */
115 memmove(wl->fwlog, wl->fwlog + len, wl->fwlog_size);
116
117 mutex_unlock(&wl->mutex);
118
119 return len;
120 }
121
122 static const struct bin_attribute fwlog_attr = {
123 .attr = { .name = "fwlog", .mode = 0400 },
124 .read = wl1271_sysfs_read_fwlog,
125 };
126
wlcore_sysfs_init(struct wl1271 * wl)127 int wlcore_sysfs_init(struct wl1271 *wl)
128 {
129 int ret;
130
131 /* Create sysfs file to control bt coex state */
132 ret = device_create_file(wl->dev, &dev_attr_bt_coex_state);
133 if (ret < 0) {
134 wl1271_error("failed to create sysfs file bt_coex_state");
135 goto out;
136 }
137
138 /* Create sysfs file to get HW PG version */
139 ret = device_create_file(wl->dev, &dev_attr_hw_pg_ver);
140 if (ret < 0) {
141 wl1271_error("failed to create sysfs file hw_pg_ver");
142 goto out_bt_coex_state;
143 }
144
145 /* Create sysfs file for the FW log */
146 ret = device_create_bin_file(wl->dev, &fwlog_attr);
147 if (ret < 0) {
148 wl1271_error("failed to create sysfs file fwlog");
149 goto out_hw_pg_ver;
150 }
151
152 goto out;
153
154 out_hw_pg_ver:
155 device_remove_file(wl->dev, &dev_attr_hw_pg_ver);
156
157 out_bt_coex_state:
158 device_remove_file(wl->dev, &dev_attr_bt_coex_state);
159
160 out:
161 return ret;
162 }
163
wlcore_sysfs_free(struct wl1271 * wl)164 void wlcore_sysfs_free(struct wl1271 *wl)
165 {
166 device_remove_bin_file(wl->dev, &fwlog_attr);
167
168 device_remove_file(wl->dev, &dev_attr_hw_pg_ver);
169
170 device_remove_file(wl->dev, &dev_attr_bt_coex_state);
171 }
172