1 /*
2 * Copyright (c) 2020, The Linux Foundation. All rights reserved.
3 * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 /**
19 * DOC: wlan_hdd_sysfs_channel.c
20 *
21 * implementation for creating sysfs file channel
22 */
23
24 #include <wlan_hdd_includes.h>
25 #include "osif_vdev_sync.h"
26 #include "wlan_hdd_sysfs_channel.h"
27
__show_channel_number(struct net_device * net_dev,char * buf)28 static ssize_t __show_channel_number(struct net_device *net_dev, char *buf)
29 {
30 struct hdd_adapter *adapter = netdev_priv(net_dev);
31 struct hdd_context *hdd_ctx;
32 struct hdd_ap_ctx *ap_ctx;
33 int chan_num = 0;
34 int ret_val;
35
36 hdd_enter_dev(net_dev);
37
38 ret_val = hdd_validate_adapter(adapter);
39 if (0 != ret_val)
40 goto exit;
41
42 if (adapter->device_mode != QDF_SAP_MODE)
43 goto exit;
44
45 hdd_ctx = WLAN_HDD_GET_CTX(adapter);
46 ret_val = wlan_hdd_validate_context(hdd_ctx);
47 if (0 != ret_val)
48 goto exit;
49
50 ap_ctx = WLAN_HDD_GET_AP_CTX_PTR(adapter->deflink);
51 if (test_bit(SOFTAP_BSS_STARTED, &adapter->deflink->link_flags)) {
52 chan_num = wlan_reg_freq_to_chan(hdd_ctx->pdev,
53 ap_ctx->operating_chan_freq);
54 ret_val = scnprintf(buf, PAGE_SIZE, "%s getchannel:%d\n",
55 net_dev->name, chan_num);
56 }
57
58 exit:
59 hdd_exit();
60 return ret_val;
61 }
62
show_channel_number(struct device * dev,struct device_attribute * attr,char * buf)63 static ssize_t show_channel_number(struct device *dev,
64 struct device_attribute *attr,
65 char *buf)
66 {
67 struct net_device *net_dev = container_of(dev, struct net_device, dev);
68 struct osif_vdev_sync *vdev_sync;
69 ssize_t err_size;
70
71 err_size = osif_vdev_sync_op_start(net_dev, &vdev_sync);
72 if (err_size)
73 return err_size;
74
75 err_size = __show_channel_number(net_dev, buf);
76
77 osif_vdev_sync_op_stop(vdev_sync);
78
79 return err_size;
80 }
81
82 static DEVICE_ATTR(channel, 0444, show_channel_number, NULL);
83
hdd_sysfs_channel_interface_create(struct hdd_adapter * adapter)84 void hdd_sysfs_channel_interface_create(struct hdd_adapter *adapter)
85 {
86 int error;
87
88 error = device_create_file(&adapter->dev->dev, &dev_attr_channel);
89 if (error)
90 hdd_err("Could not create channel sysfs file");
91 }
92
hdd_sysfs_channel_interface_destroy(struct hdd_adapter * adapter)93 void hdd_sysfs_channel_interface_destroy(struct hdd_adapter *adapter)
94 {
95 device_remove_file(&adapter->dev->dev, &dev_attr_channel);
96 }
97