| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 2 | /* |
| 3 | |
| 4 | Broadcom B43 wireless driver |
| 5 | |
| 6 | SYSFS support routines |
| 7 | |
| 8 | Copyright (c) 2006 Michael Buesch <m@bues.ch> |
| 9 | |
| 10 | |
| 11 | */ |
| 12 | |
| 13 | #include <linux/capability.h> |
| 14 | #include <linux/io.h> |
| 15 | |
| 16 | #include "b43.h" |
| 17 | #include "sysfs.h" |
| 18 | #include "main.h" |
| 19 | #include "phy_common.h" |
| 20 | |
| 21 | #define GENERIC_FILESIZE 64 |
| 22 | |
| 23 | static int get_integer(const char *buf, size_t count) |
| 24 | { |
| 25 | char tmp[10 + 1] = { 0 }; |
| 26 | int ret = -EINVAL; |
| 27 | |
| 28 | if (count == 0) |
| 29 | goto out; |
| 30 | count = min_t(size_t, count, 10); |
| 31 | memcpy(tmp, buf, count); |
| 32 | ret = simple_strtol(tmp, NULL, 10); |
| 33 | out: |
| 34 | return ret; |
| 35 | } |
| 36 | |
| 37 | static ssize_t b43_attr_interfmode_show(struct device *dev, |
| 38 | struct device_attribute *attr, |
| 39 | char *buf) |
| 40 | { |
| 41 | struct b43_wldev *wldev = dev_to_b43_wldev(dev); |
| 42 | ssize_t count = 0; |
| 43 | |
| 44 | if (!capable(CAP_NET_ADMIN)) |
| 45 | return -EPERM; |
| 46 | |
| 47 | mutex_lock(&wldev->wl->mutex); |
| 48 | |
| 49 | if (wldev->phy.type != B43_PHYTYPE_G) { |
| 50 | mutex_unlock(&wldev->wl->mutex); |
| 51 | return -ENOSYS; |
| 52 | } |
| 53 | |
| 54 | switch (wldev->phy.g->interfmode) { |
| 55 | case B43_INTERFMODE_NONE: |
| 56 | count = |
| 57 | snprintf(buf, PAGE_SIZE, |
| 58 | "0 (No Interference Mitigation)\n"); |
| 59 | break; |
| 60 | case B43_INTERFMODE_NONWLAN: |
| 61 | count = |
| 62 | snprintf(buf, PAGE_SIZE, |
| 63 | "1 (Non-WLAN Interference Mitigation)\n"); |
| 64 | break; |
| 65 | case B43_INTERFMODE_MANUALWLAN: |
| 66 | count = |
| 67 | snprintf(buf, PAGE_SIZE, |
| 68 | "2 (WLAN Interference Mitigation)\n"); |
| 69 | break; |
| 70 | default: |
| 71 | B43_WARN_ON(1); |
| 72 | } |
| 73 | |
| 74 | mutex_unlock(&wldev->wl->mutex); |
| 75 | |
| 76 | return count; |
| 77 | } |
| 78 | |
| 79 | static ssize_t b43_attr_interfmode_store(struct device *dev, |
| 80 | struct device_attribute *attr, |
| 81 | const char *buf, size_t count) |
| 82 | { |
| 83 | struct b43_wldev *wldev = dev_to_b43_wldev(dev); |
| 84 | int err; |
| 85 | int mode; |
| 86 | |
| 87 | if (!capable(CAP_NET_ADMIN)) |
| 88 | return -EPERM; |
| 89 | |
| 90 | mode = get_integer(buf, count); |
| 91 | switch (mode) { |
| 92 | case 0: |
| 93 | mode = B43_INTERFMODE_NONE; |
| 94 | break; |
| 95 | case 1: |
| 96 | mode = B43_INTERFMODE_NONWLAN; |
| 97 | break; |
| 98 | case 2: |
| 99 | mode = B43_INTERFMODE_MANUALWLAN; |
| 100 | break; |
| 101 | case 3: |
| 102 | mode = B43_INTERFMODE_AUTOWLAN; |
| 103 | break; |
| 104 | default: |
| 105 | return -EINVAL; |
| 106 | } |
| 107 | |
| 108 | mutex_lock(&wldev->wl->mutex); |
| 109 | |
| 110 | if (wldev->phy.ops->interf_mitigation) { |
| 111 | err = wldev->phy.ops->interf_mitigation(wldev, mode); |
| 112 | if (err) { |
| 113 | b43err(wldev->wl, "Interference Mitigation not " |
| 114 | "supported by device\n"); |
| 115 | } |
| 116 | } else |
| 117 | err = -ENOSYS; |
| 118 | |
| 119 | mutex_unlock(&wldev->wl->mutex); |
| 120 | |
| 121 | return err ? err : count; |
| 122 | } |
| 123 | |
| 124 | static DEVICE_ATTR(interference, 0644, |
| 125 | b43_attr_interfmode_show, b43_attr_interfmode_store); |
| 126 | |
| 127 | int b43_sysfs_register(struct b43_wldev *wldev) |
| 128 | { |
| 129 | struct device *dev = wldev->dev->dev; |
| 130 | |
| 131 | B43_WARN_ON(b43_status(wldev) != B43_STAT_INITIALIZED); |
| 132 | |
| 133 | return device_create_file(dev, &dev_attr_interference); |
| 134 | } |
| 135 | |
| 136 | void b43_sysfs_unregister(struct b43_wldev *wldev) |
| 137 | { |
| 138 | struct device *dev = wldev->dev->dev; |
| 139 | |
| 140 | device_remove_file(dev, &dev_attr_interference); |
| 141 | } |