net/ieee802154/sysfs.c

   1 /* This program is free software; you can redistribute it and/or modify
   2  * it under the terms of the GNU General Public License version 2
   3  * as published by the Free Software Foundation.
   4  *
   5  * This program is distributed in the hope that it will be useful,
   6  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   7  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   8  * GNU General Public License for more details.
   9  *
  10  * Authors:
  11  * Alexander Aring <aar@pengutronix.de>
  12  *
  13  * Based on: net/wireless/sysfs.c
  14  */
  15
  16 #include <linux/device.h>
  17
  18 #include <net/cfg802154.h>
  19
  20 #include "core.h"
  21 #include "sysfs.h"
  22
  23 static inline struct cfg802154_registered_device *
  24 dev_to_rdev(struct device *dev)
  25 {
  26         return container_of(dev, struct cfg802154_registered_device,
  27                             wpan_phy.dev);
  28 }
  29
  30 #define SHOW_FMT(name, fmt, member)                                     \
  31 static ssize_t name ## _show(struct device *dev,                        \
  32                              struct device_attribute *attr,             \
  33                              char *buf)                                 \
  34 {                                                                       \
  35         return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member);        \
  36 }                                                                       \
  37 static DEVICE_ATTR_RO(name)
  38
  39 SHOW_FMT(index, "%d", wpan_phy_idx);
  40
  41 static ssize_t name_show(struct device *dev,
  42                          struct device_attribute *attr,
  43                          char *buf)
  44 {
  45         struct wpan_phy *wpan_phy = &dev_to_rdev(dev)->wpan_phy;
  46
  47         return sprintf(buf, "%s\n", dev_name(&wpan_phy->dev));
  48 }
  49 static DEVICE_ATTR_RO(name);
  50
  51 #define MASTER_SHOW_COMPLEX(name, format_string, args...)               \
  52 static ssize_t name ## _show(struct device *dev,                        \
  53                             struct device_attribute *attr, char *buf)   \
  54 {                                                                       \
  55         struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev); \
  56         int ret;                                                        \
  57                                                                         \
  58         mutex_lock(&phy->pib_lock);                                     \
  59         ret = snprintf(buf, PAGE_SIZE, format_string "\n", args);       \
  60         mutex_unlock(&phy->pib_lock);                                   \
  61         return ret;                                                     \
  62 }                                                                       \
  63 static DEVICE_ATTR_RO(name)
  64
  65 #define MASTER_SHOW(field, format_string)                               \
  66         MASTER_SHOW_COMPLEX(field, format_string, phy->field)
  67
  68 MASTER_SHOW(current_channel, "%d");
  69 MASTER_SHOW(current_page, "%d");
  70 MASTER_SHOW(transmit_power, "%d +- 1 dB");
  71 MASTER_SHOW(cca_mode, "%d");
  72
  73 static ssize_t channels_supported_show(struct device *dev,
  74                                        struct device_attribute *attr,
  75                                        char *buf)
  76 {
  77         struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev);
  78         int ret;
  79         int i, len = 0;
  80
  81         mutex_lock(&phy->pib_lock);
  82         for (i = 0; i < 32; i++) {
  83                 ret = snprintf(buf + len, PAGE_SIZE - len,
  84                                "%#09x\n", phy->channels_supported[i]);
  85                 if (ret < 0)
  86                         break;
  87                 len += ret;
  88         }
  89         mutex_unlock(&phy->pib_lock);
  90         return len;
  91 }
  92 static DEVICE_ATTR_RO(channels_supported);
  93
  94 static void wpan_phy_release(struct device *dev)
  95 {
  96         struct cfg802154_registered_device *rdev = dev_to_rdev(dev);
  97
  98         cfg802154_dev_free(rdev);
  99 }
 100
 101 static struct attribute *pmib_attrs[] = {
 102         &dev_attr_index.attr,
 103         &dev_attr_name.attr,
 104         /* below will be removed soon */
 105         &dev_attr_current_channel.attr,
 106         &dev_attr_current_page.attr,
 107         &dev_attr_channels_supported.attr,
 108         &dev_attr_transmit_power.attr,
 109         &dev_attr_cca_mode.attr,
 110         NULL,
 111 };
 112 ATTRIBUTE_GROUPS(pmib);
 113
 114 struct class wpan_phy_class = {
 115         .name = "ieee802154",
 116         .dev_release = wpan_phy_release,
 117         .dev_groups = pmib_groups,
 118 };
 119
 120 int wpan_phy_sysfs_init(void)
 121 {
 122         return class_register(&wpan_phy_class);
 123 }
 124
 125 void wpan_phy_sysfs_exit(void)
 126 {
 127         class_unregister(&wpan_phy_class);
 128 }