1 /*
2  * Copyright (c) 2011-2020 The Linux Foundation. All rights reserved.
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
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 /**
18  * DOC: wlan_hdd_sysfs_temperature.c
19  *
20  * Implementation for creating sysfs file temperature
21  */
22 
23 #include <wlan_hdd_includes.h>
24 #include <wlan_hdd_sysfs.h>
25 #include "osif_vdev_sync.h"
26 #include <wlan_hdd_sysfs_temperature.h>
27 #include <wlan_hdd_stats.h>
28 
29 static ssize_t
__hdd_sysfs_temperature_show(struct net_device * net_dev,char * buf)30 __hdd_sysfs_temperature_show(struct net_device *net_dev, char *buf)
31 {
32 	struct hdd_adapter *adapter = netdev_priv(net_dev);
33 	struct hdd_context *hdd_ctx;
34 	int value;
35 	int ret;
36 
37 	if (hdd_validate_adapter(adapter))
38 		return -EINVAL;
39 
40 	hdd_ctx = WLAN_HDD_GET_CTX(adapter);
41 	ret = wlan_hdd_validate_context(hdd_ctx);
42 	if (ret)
43 		return ret;
44 
45 	if (!wlan_hdd_validate_modules_state(hdd_ctx))
46 		return -EINVAL;
47 
48 	hdd_debug("SYSFS_GET_TEMPERATURE");
49 	ret = wlan_hdd_get_temperature(adapter, &value);
50 
51 	if (ret) {
52 		hdd_err_rl("GET_TEMP failed: %d", ret);
53 		return ret;
54 	}
55 
56 	return scnprintf(buf, PAGE_SIZE, "%d\n", value);
57 }
58 
59 static ssize_t
hdd_sysfs_temperature_show(struct device * dev,struct device_attribute * attr,char * buf)60 hdd_sysfs_temperature_show(struct device *dev,
61 			   struct device_attribute *attr,
62 			   char *buf)
63 {
64 	struct net_device *net_dev = container_of(dev, struct net_device, dev);
65 	struct osif_vdev_sync *vdev_sync;
66 	ssize_t err_size;
67 
68 	err_size = osif_vdev_sync_op_start(net_dev, &vdev_sync);
69 	if (err_size)
70 		return err_size;
71 
72 	err_size = __hdd_sysfs_temperature_show(net_dev, buf);
73 
74 	osif_vdev_sync_op_stop(vdev_sync);
75 
76 	return err_size;
77 }
78 
79 static DEVICE_ATTR(temperature, 0440,
80 		   hdd_sysfs_temperature_show, NULL);
81 
hdd_sysfs_temperature_create(struct hdd_adapter * adapter)82 int hdd_sysfs_temperature_create(struct hdd_adapter *adapter)
83 {
84 	int error;
85 
86 	error = device_create_file(&adapter->dev->dev,
87 				   &dev_attr_temperature);
88 	if (error)
89 		hdd_err("could not create temperature sysfs file");
90 
91 	return error;
92 }
93 
hdd_sysfs_temperature_destroy(struct hdd_adapter * adapter)94 void hdd_sysfs_temperature_destroy(struct hdd_adapter *adapter)
95 {
96 	device_remove_file(&adapter->dev->dev, &dev_attr_temperature);
97 }
98