Quelle  sysfs.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/device.h>
#include <linux/pci.h>

#include "ath5k.h"
#include "reg.h"

#define SIMPLE_SHOW_STORE(name, get, set)    \
static ssize_t ath5k_attr_show_##name(struct device *dev,  \
   struct device_attribute *attr,   \
   char *buf)     \
{         \
 struct ieee80211_hw *hw = dev_get_drvdata(dev);   \
 struct ath5k_hw *ah = hw->priv;    \
 return sysfs_emit(buf, "%d\n", get);   \
}         \
         \
static ssize_t ath5k_attr_store_##name(struct device *dev,  \
   struct device_attribute *attr,   \
   const char *buf, size_t count)   \
{         \
 struct ieee80211_hw *hw = dev_get_drvdata(dev);   \
 struct ath5k_hw *ah = hw->priv;    \
 int val, ret;       \
         \
 ret = kstrtoint(buf, 10, &val);     \
 if (ret < 0)       \
  return ret;      \
 set(ah, val);      \
 return count;       \
}         \
static DEVICE_ATTR(name, 0644,      \
     ath5k_attr_show_##name, ath5k_attr_store_##name)

#define SIMPLE_SHOW(name, get)      \
static ssize_t ath5k_attr_show_##name(struct device *dev,  \
   struct device_attribute *attr,   \
   char *buf)     \
{         \
 struct ieee80211_hw *hw = dev_get_drvdata(dev);   \
 struct ath5k_hw *ah = hw->priv;    \
 return sysfs_emit(buf, "%d\n", get);   \
}         \
static DEVICE_ATTR(name, 0444, ath5k_attr_show_##name, NULL)

/*** ANI ***/

SIMPLE_SHOW_STORE(ani_mode, ah->ani_state.ani_mode, ath5k_ani_init);
SIMPLE_SHOW_STORE(noise_immunity_level, ah->ani_state.noise_imm_level,
   ath5k_ani_set_noise_immunity_level);
SIMPLE_SHOW_STORE(spur_level, ah->ani_state.spur_level,
   ath5k_ani_set_spur_immunity_level);
SIMPLE_SHOW_STORE(firstep_level, ah->ani_state.firstep_level,
   ath5k_ani_set_firstep_level);
SIMPLE_SHOW_STORE(ofdm_weak_signal_detection, ah->ani_state.ofdm_weak_sig,
   ath5k_ani_set_ofdm_weak_signal_detection);
SIMPLE_SHOW_STORE(cck_weak_signal_detection, ah->ani_state.cck_weak_sig,
   ath5k_ani_set_cck_weak_signal_detection);
SIMPLE_SHOW(spur_level_max, ah->ani_state.max_spur_level);

static ssize_t ath5k_attr_show_noise_immunity_level_max(struct device *dev,
   struct device_attribute *attr,
   char *buf)
{
 return sysfs_emit(buf, "%d\n", ATH5K_ANI_MAX_NOISE_IMM_LVL);
}
static DEVICE_ATTR(noise_immunity_level_max, 0444,
     ath5k_attr_show_noise_immunity_level_max, NULL);

static ssize_t ath5k_attr_show_firstep_level_max(struct device *dev,
   struct device_attribute *attr,
   char *buf)
{
 return sysfs_emit(buf, "%d\n", ATH5K_ANI_MAX_FIRSTEP_LVL);
}
static DEVICE_ATTR(firstep_level_max, 0444,
     ath5k_attr_show_firstep_level_max, NULL);

static struct attribute *ath5k_sysfs_entries_ani[] = {
 &dev_attr_ani_mode.attr,
 &dev_attr_noise_immunity_level.attr,
 &dev_attr_spur_level.attr,
 &dev_attr_firstep_level.attr,
 &dev_attr_ofdm_weak_signal_detection.attr,
 &dev_attr_cck_weak_signal_detection.attr,
 &dev_attr_noise_immunity_level_max.attr,
 &dev_attr_spur_level_max.attr,
 &dev_attr_firstep_level_max.attr,
 NULL
};

static struct attribute_group ath5k_attribute_group_ani = {
 .name = "ani",
 .attrs = ath5k_sysfs_entries_ani,
};


/*** register / unregister ***/

int
ath5k_sysfs_register(struct ath5k_hw *ah)
{
 struct device *dev = ah->dev;
 int err;

 err = sysfs_create_group(&dev->kobj, &ath5k_attribute_group_ani);
 if (err) {
  ATH5K_ERR(ah, "failed to create sysfs group\n");
  return err;
 }

 return 0;
}

void
ath5k_sysfs_unregister(struct ath5k_hw *ah)
{
 struct device *dev = ah->dev;

 sysfs_remove_group(&dev->kobj, &ath5k_attribute_group_ani);
}