sysfs.c

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#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 snprintf(buf, PAGE_SIZE, "%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, S_IRUGO | S_IWUSR,             \
           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 snprintf(buf, PAGE_SIZE, "%d\n", get);           \
}                                   \
static DEVICE_ATTR(name, S_IRUGO, 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 snprintf(buf, PAGE_SIZE, "%d\n", ATH5K_ANI_MAX_NOISE_IMM_LVL);
}
static DEVICE_ATTR(noise_immunity_level_max, S_IRUGO,
           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 snprintf(buf, PAGE_SIZE, "%d\n", ATH5K_ANI_MAX_FIRSTEP_LVL);
}
static DEVICE_ATTR(firstep_level_max, S_IRUGO,
           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);
}