1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun
4*4882a593Smuzhiyun Broadcom B43 wireless driver
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun SYSFS support routines
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun Copyright (c) 2006 Michael Buesch <m@bues.ch>
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun */
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include <linux/capability.h>
14*4882a593Smuzhiyun #include <linux/io.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include "b43.h"
17*4882a593Smuzhiyun #include "sysfs.h"
18*4882a593Smuzhiyun #include "main.h"
19*4882a593Smuzhiyun #include "phy_common.h"
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #define GENERIC_FILESIZE 64
22*4882a593Smuzhiyun
get_integer(const char * buf,size_t count)23*4882a593Smuzhiyun static int get_integer(const char *buf, size_t count)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun char tmp[10 + 1] = { 0 };
26*4882a593Smuzhiyun int ret = -EINVAL;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun if (count == 0)
29*4882a593Smuzhiyun goto out;
30*4882a593Smuzhiyun count = min_t(size_t, count, 10);
31*4882a593Smuzhiyun memcpy(tmp, buf, count);
32*4882a593Smuzhiyun ret = simple_strtol(tmp, NULL, 10);
33*4882a593Smuzhiyun out:
34*4882a593Smuzhiyun return ret;
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun
b43_attr_interfmode_show(struct device * dev,struct device_attribute * attr,char * buf)37*4882a593Smuzhiyun static ssize_t b43_attr_interfmode_show(struct device *dev,
38*4882a593Smuzhiyun struct device_attribute *attr,
39*4882a593Smuzhiyun char *buf)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun struct b43_wldev *wldev = dev_to_b43_wldev(dev);
42*4882a593Smuzhiyun ssize_t count = 0;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun if (!capable(CAP_NET_ADMIN))
45*4882a593Smuzhiyun return -EPERM;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun mutex_lock(&wldev->wl->mutex);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun if (wldev->phy.type != B43_PHYTYPE_G) {
50*4882a593Smuzhiyun mutex_unlock(&wldev->wl->mutex);
51*4882a593Smuzhiyun return -ENOSYS;
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun switch (wldev->phy.g->interfmode) {
55*4882a593Smuzhiyun case B43_INTERFMODE_NONE:
56*4882a593Smuzhiyun count =
57*4882a593Smuzhiyun snprintf(buf, PAGE_SIZE,
58*4882a593Smuzhiyun "0 (No Interference Mitigation)\n");
59*4882a593Smuzhiyun break;
60*4882a593Smuzhiyun case B43_INTERFMODE_NONWLAN:
61*4882a593Smuzhiyun count =
62*4882a593Smuzhiyun snprintf(buf, PAGE_SIZE,
63*4882a593Smuzhiyun "1 (Non-WLAN Interference Mitigation)\n");
64*4882a593Smuzhiyun break;
65*4882a593Smuzhiyun case B43_INTERFMODE_MANUALWLAN:
66*4882a593Smuzhiyun count =
67*4882a593Smuzhiyun snprintf(buf, PAGE_SIZE,
68*4882a593Smuzhiyun "2 (WLAN Interference Mitigation)\n");
69*4882a593Smuzhiyun break;
70*4882a593Smuzhiyun default:
71*4882a593Smuzhiyun B43_WARN_ON(1);
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun mutex_unlock(&wldev->wl->mutex);
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun return count;
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun
b43_attr_interfmode_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)79*4882a593Smuzhiyun static ssize_t b43_attr_interfmode_store(struct device *dev,
80*4882a593Smuzhiyun struct device_attribute *attr,
81*4882a593Smuzhiyun const char *buf, size_t count)
82*4882a593Smuzhiyun {
83*4882a593Smuzhiyun struct b43_wldev *wldev = dev_to_b43_wldev(dev);
84*4882a593Smuzhiyun int err;
85*4882a593Smuzhiyun int mode;
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun if (!capable(CAP_NET_ADMIN))
88*4882a593Smuzhiyun return -EPERM;
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun mode = get_integer(buf, count);
91*4882a593Smuzhiyun switch (mode) {
92*4882a593Smuzhiyun case 0:
93*4882a593Smuzhiyun mode = B43_INTERFMODE_NONE;
94*4882a593Smuzhiyun break;
95*4882a593Smuzhiyun case 1:
96*4882a593Smuzhiyun mode = B43_INTERFMODE_NONWLAN;
97*4882a593Smuzhiyun break;
98*4882a593Smuzhiyun case 2:
99*4882a593Smuzhiyun mode = B43_INTERFMODE_MANUALWLAN;
100*4882a593Smuzhiyun break;
101*4882a593Smuzhiyun case 3:
102*4882a593Smuzhiyun mode = B43_INTERFMODE_AUTOWLAN;
103*4882a593Smuzhiyun break;
104*4882a593Smuzhiyun default:
105*4882a593Smuzhiyun return -EINVAL;
106*4882a593Smuzhiyun }
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun mutex_lock(&wldev->wl->mutex);
109*4882a593Smuzhiyun
110*4882a593Smuzhiyun if (wldev->phy.ops->interf_mitigation) {
111*4882a593Smuzhiyun err = wldev->phy.ops->interf_mitigation(wldev, mode);
112*4882a593Smuzhiyun if (err) {
113*4882a593Smuzhiyun b43err(wldev->wl, "Interference Mitigation not "
114*4882a593Smuzhiyun "supported by device\n");
115*4882a593Smuzhiyun }
116*4882a593Smuzhiyun } else
117*4882a593Smuzhiyun err = -ENOSYS;
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun mutex_unlock(&wldev->wl->mutex);
120*4882a593Smuzhiyun
121*4882a593Smuzhiyun return err ? err : count;
122*4882a593Smuzhiyun }
123*4882a593Smuzhiyun
124*4882a593Smuzhiyun static DEVICE_ATTR(interference, 0644,
125*4882a593Smuzhiyun b43_attr_interfmode_show, b43_attr_interfmode_store);
126*4882a593Smuzhiyun
b43_sysfs_register(struct b43_wldev * wldev)127*4882a593Smuzhiyun int b43_sysfs_register(struct b43_wldev *wldev)
128*4882a593Smuzhiyun {
129*4882a593Smuzhiyun struct device *dev = wldev->dev->dev;
130*4882a593Smuzhiyun
131*4882a593Smuzhiyun B43_WARN_ON(b43_status(wldev) != B43_STAT_INITIALIZED);
132*4882a593Smuzhiyun
133*4882a593Smuzhiyun return device_create_file(dev, &dev_attr_interference);
134*4882a593Smuzhiyun }
135*4882a593Smuzhiyun
b43_sysfs_unregister(struct b43_wldev * wldev)136*4882a593Smuzhiyun void b43_sysfs_unregister(struct b43_wldev *wldev)
137*4882a593Smuzhiyun {
138*4882a593Smuzhiyun struct device *dev = wldev->dev->dev;
139*4882a593Smuzhiyun
140*4882a593Smuzhiyun device_remove_file(dev, &dev_attr_interference);
141*4882a593Smuzhiyun }
142