ath5k: add sysfs files for ANI parameters

/sys/class/ieee80211/phy0/device/ani/ani_mode
/sys/class/ieee80211/phy0/device/ani/noise_immunity_level
/sys/class/ieee80211/phy0/device/ani/spur_level
/sys/class/ieee80211/phy0/device/ani/firstep_level
/sys/class/ieee80211/phy0/device/ani/ofdm_weak_signal_detection
/sys/class/ieee80211/phy0/device/ani/cck_weak_signal_detection
/sys/class/ieee80211/phy0/device/ani/noise_immunity_level_max
/sys/class/ieee80211/phy0/device/ani/spur_level_max
/sys/class/ieee80211/phy0/device/ani/firstep_level_max

sysfs has a lot of symlinks, so you can find the files also in other locations,
like (by PCI ID) /sys/devices/pci0000:00/0000:00:11.0/ani and others.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

5 files changed, 123 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/ath5k/Makefile b/drivers/net/wireless/ath/ath5k/Makefile
index cc09595b781..2242a140e4f 100644
--- a/drivers/net/wireless/ath/ath5k/Makefile
+++ b/drivers/net/wireless/ath/ath5k/Makefile
@@ -13,5 +13,6 @@ ath5k-y				+= base.o
 ath5k-y                         += led.o
 ath5k-y                         += rfkill.o
 ath5k-y                         += ani.o
+ath5k-y                         += sysfs.o
 ath5k-$(CONFIG_ATH5K_DEBUG)     += debug.o
 obj-$(CONFIG_ATH5K)             += ath5k.o
diff --git a/drivers/net/wireless/ath/ath5k/ath5k.h b/drivers/net/wireless/ath/ath5k/ath5k.h
index d6f9afebf92..eace74dac00 100644
--- a/drivers/net/wireless/ath/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath/ath5k/ath5k.h
@@ -1150,6 +1150,9 @@ struct ath5k_hw {
 int ath5k_hw_attach(struct ath5k_softc *sc);
 void ath5k_hw_detach(struct ath5k_hw *ah);
 
+int ath5k_sysfs_register(struct ath5k_softc *sc);
+void ath5k_sysfs_unregister(struct ath5k_softc *sc);
+
 /* LED functions */
 int ath5k_init_leds(struct ath5k_softc *sc);
 void ath5k_led_enable(struct ath5k_softc *sc);
diff --git a/drivers/net/wireless/ath/ath5k/base.c b/drivers/net/wireless/ath/ath5k/base.c
index e63aeaa36c3..0aabfab2770 100644
--- a/drivers/net/wireless/ath/ath5k/base.c
+++ b/drivers/net/wireless/ath/ath5k/base.c
@@ -862,6 +862,8 @@ ath5k_attach(struct pci_dev *pdev, struct ieee80211_hw *hw)
 
         ath5k_init_leds(sc);
 
+        ath5k_sysfs_register(sc);
+
         return 0;
 err_queues:
         ath5k_txq_release(sc);
@@ -897,6 +899,7 @@ ath5k_detach(struct pci_dev *pdev, struct ieee80211_hw *hw)
         ath5k_hw_release_tx_queue(sc->ah, sc->bhalq);
         ath5k_unregister_leds(sc);
 
+        ath5k_sysfs_unregister(sc);
         /*
          * NB: can't reclaim these until after ieee80211_ifdetach
          * returns because we'll get called back to reclaim node
diff --git a/drivers/net/wireless/ath/ath5k/reset.c b/drivers/net/wireless/ath/ath5k/reset.c
index a1bc01528ab..c17c84e9356 100644
--- a/drivers/net/wireless/ath/ath5k/reset.c
+++ b/drivers/net/wireless/ath/ath5k/reset.c
@@ -850,7 +850,6 @@ static void ath5k_hw_commit_eeprom_settings(struct ath5k_hw *ah,
                         AR5K_PHY_NF_THRESH62,
                         ee->ee_thr_62[ee_mode]);
 
-
         /* False detect backoff for channels
          * that have spur noise. Write the new
          * cyclic power RSSI threshold. */
diff --git a/drivers/net/wireless/ath/ath5k/sysfs.c b/drivers/net/wireless/ath/ath5k/sysfs.c
new file mode 100644
index 00000000000..90757de7bf5
--- /dev/null
+++ b/drivers/net/wireless/ath/ath5k/sysfs.c
@@ -0,0 +1,116 @@
+#include <linux/device.h>
+#include <linux/pci.h>
+
+#include "base.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 ath5k_softc *sc = dev_get_drvdata(dev);                  \
+        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 ath5k_softc *sc = dev_get_drvdata(dev);                  \
+        int val;                                                        \
+                                                                        \
+        val = (int)simple_strtoul(buf, NULL, 10);                       \
+        set(sc->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 ath5k_softc *sc = dev_get_drvdata(dev);                  \
+        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, sc->ani_state.ani_mode, ath5k_ani_init);
+SIMPLE_SHOW_STORE(noise_immunity_level, sc->ani_state.noise_imm_level,
+                        ath5k_ani_set_noise_immunity_level);
+SIMPLE_SHOW_STORE(spur_level, sc->ani_state.spur_level,
+                        ath5k_ani_set_spur_immunity_level);
+SIMPLE_SHOW_STORE(firstep_level, sc->ani_state.firstep_level,
+                        ath5k_ani_set_firstep_level);
+SIMPLE_SHOW_STORE(ofdm_weak_signal_detection, sc->ani_state.ofdm_weak_sig,
+                        ath5k_ani_set_ofdm_weak_signal_detection);
+SIMPLE_SHOW_STORE(cck_weak_signal_detection, sc->ani_state.cck_weak_sig,
+                        ath5k_ani_set_cck_weak_signal_detection);
+SIMPLE_SHOW(spur_level_max, sc->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_softc *sc)
+{
+        struct device *dev = &sc->pdev->dev;
+        int err;
+
+        err = sysfs_create_group(&dev->kobj, &ath5k_attribute_group_ani);
+        if (err) {
+                ATH5K_ERR(sc, "failed to create sysfs group\n");
+                return err;
+        }
+
+        return 0;
+}
+
+void
+ath5k_sysfs_unregister(struct ath5k_softc *sc)
+{
+        struct device *dev = &sc->pdev->dev;
+
+        sysfs_remove_group(&dev->kobj, &ath5k_attribute_group_ani);
+}