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_get_sync(wl->dev);
60 if (ret < 0) {
61 pm_runtime_put_noidle(wl->dev);
62 goto out;
63 }
64
65 wl1271_acx_sg_enable(wl, wl->sg_enabled);
66 pm_runtime_mark_last_busy(wl->dev);
67 pm_runtime_put_autosuspend(wl->dev);
68
69 out:
70 mutex_unlock(&wl->mutex);
71 return count;
72 }
73
74 static DEVICE_ATTR_RW(bt_coex_state);
75
hw_pg_ver_show(struct device * dev,struct device_attribute * attr,char * buf)76 static ssize_t hw_pg_ver_show(struct device *dev,
77 struct device_attribute *attr,
78 char *buf)
79 {
80 struct wl1271 *wl = dev_get_drvdata(dev);
81 ssize_t len;
82
83 len = PAGE_SIZE;
84
85 mutex_lock(&wl->mutex);
86 if (wl->hw_pg_ver >= 0)
87 len = snprintf(buf, len, "%d\n", wl->hw_pg_ver);
88 else
89 len = snprintf(buf, len, "n/a\n");
90 mutex_unlock(&wl->mutex);
91
92 return len;
93 }
94
95 static DEVICE_ATTR_RO(hw_pg_ver);
96
wl1271_sysfs_read_fwlog(struct file * filp,struct kobject * kobj,struct bin_attribute * bin_attr,char * buffer,loff_t pos,size_t count)97 static ssize_t wl1271_sysfs_read_fwlog(struct file *filp, struct kobject *kobj,
98 struct bin_attribute *bin_attr,
99 char *buffer, loff_t pos, size_t count)
100 {
101 struct device *dev = kobj_to_dev(kobj);
102 struct wl1271 *wl = dev_get_drvdata(dev);
103 ssize_t len;
104 int ret;
105
106 ret = mutex_lock_interruptible(&wl->mutex);
107 if (ret < 0)
108 return -ERESTARTSYS;
109
110 /* Check if the fwlog is still valid */
111 if (wl->fwlog_size < 0) {
112 mutex_unlock(&wl->mutex);
113 return 0;
114 }
115
116 /* Seeking is not supported - old logs are not kept. Disregard pos. */
117 len = min_t(size_t, count, wl->fwlog_size);
118 wl->fwlog_size -= len;
119 memcpy(buffer, wl->fwlog, len);
120
121 /* Make room for new messages */
122 memmove(wl->fwlog, wl->fwlog + len, wl->fwlog_size);
123
124 mutex_unlock(&wl->mutex);
125
126 return len;
127 }
128
129 static const struct bin_attribute fwlog_attr = {
130 .attr = { .name = "fwlog", .mode = 0400 },
131 .read = wl1271_sysfs_read_fwlog,
132 };
133
wlcore_sysfs_init(struct wl1271 * wl)134 int wlcore_sysfs_init(struct wl1271 *wl)
135 {
136 int ret;
137
138 /* Create sysfs file to control bt coex state */
139 ret = device_create_file(wl->dev, &dev_attr_bt_coex_state);
140 if (ret < 0) {
141 wl1271_error("failed to create sysfs file bt_coex_state");
142 goto out;
143 }
144
145 /* Create sysfs file to get HW PG version */
146 ret = device_create_file(wl->dev, &dev_attr_hw_pg_ver);
147 if (ret < 0) {
148 wl1271_error("failed to create sysfs file hw_pg_ver");
149 goto out_bt_coex_state;
150 }
151
152 /* Create sysfs file for the FW log */
153 ret = device_create_bin_file(wl->dev, &fwlog_attr);
154 if (ret < 0) {
155 wl1271_error("failed to create sysfs file fwlog");
156 goto out_hw_pg_ver;
157 }
158
159 goto out;
160
161 out_hw_pg_ver:
162 device_remove_file(wl->dev, &dev_attr_hw_pg_ver);
163
164 out_bt_coex_state:
165 device_remove_file(wl->dev, &dev_attr_bt_coex_state);
166
167 out:
168 return ret;
169 }
170
wlcore_sysfs_free(struct wl1271 * wl)171 void wlcore_sysfs_free(struct wl1271 *wl)
172 {
173 device_remove_bin_file(wl->dev, &fwlog_attr);
174
175 device_remove_file(wl->dev, &dev_attr_hw_pg_ver);
176
177 device_remove_file(wl->dev, &dev_attr_bt_coex_state);
178 }
179