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#include "wlan_includes.h"
DEFINE_SPINLOCK(rssi_buf_lock);
void wlan_add_new_aver_rssi(wlan_private * priv, u8 * bssid, u8 rssi)
{
t_aver_bssid_rssi * list = (t_aver_bssid_rssi *)kmalloc(sizeof(t_aver_bssid_rssi), GFP_KERNEL);
if(!list)
return;
list->dirty = 0;
memset(list->rssi, 0, sizeof(list->rssi));
if(((s8)rssi) > 0)
rssi -= 0x100;
else if(((s8)rssi) > -20)
rssi = ((s8)rssi) - 20;
list->rssi[0] = rssi;
list->index = 1;
list->count = 1;
memcpy(list->bssid, bssid, 6);
spin_lock(&rssi_buf_lock);
list_add_tail(&list->list, &priv->AverRssiQ);
spin_unlock(&rssi_buf_lock);
}
t_aver_bssid_rssi* wlan_find_bssid_in_aver_rssi(wlan_private * priv, u8 * bssid)
{
t_aver_bssid_rssi * rssi_list = NULL;
spin_lock(&rssi_buf_lock);
if(list_empty(&priv->AverRssiQ)){
spin_unlock(&rssi_buf_lock);
return NULL;
}
list_for_each_entry(rssi_list, &priv->AverRssiQ, list){
if(memcmp(bssid, rssi_list->bssid, 6) == 0){
spin_unlock(&rssi_buf_lock);
return rssi_list;
}
}
spin_unlock(&rssi_buf_lock);
return NULL;
}
void wlan_set_aver_rssi(t_aver_bssid_rssi* aver_rssi, u8 rssi)
{
u8 index = 0;
u8 *ch = 0;
ch = aver_rssi->bssid;
if(((s8)rssi) > 0)
rssi -= 0x100;
else if(((s8)rssi) > -20)
rssi = ((s8)rssi) - 20;
index = aver_rssi->index;
aver_rssi->rssi[index] = rssi;
index = (index + 1)%MAX_RSSI_RECORD;
aver_rssi->index = index;
if(aver_rssi->count < MAX_RSSI_RECORD)
aver_rssi->count ++;
if(aver_rssi->dirty > 0)
aver_rssi->dirty --;
}
void wlan_update_aver_rssi(wlan_private * priv, u8 * bssid, u8 rssi)
{
t_aver_bssid_rssi* aver_rssi = NULL;
aver_rssi = wlan_find_bssid_in_aver_rssi(priv, bssid);
if(aver_rssi)
wlan_set_aver_rssi(aver_rssi, rssi);
else
wlan_add_new_aver_rssi(priv, bssid, rssi);
}
s8 wlan_cal_aver_rssi(t_aver_bssid_rssi* aver_rssi)
{
s32 rssi = 0;
u8 i = 0, count = 0;
count = aver_rssi->count;
for(i = 0; i < count; i ++){
rssi += (s8)aver_rssi->rssi[i];
}
//-15 was hardware diff
return ((s8)(rssi/count)) - 15;
}
s8 wlan_get_aver_rssi(wlan_private * priv, u8 * bssid)
{
t_aver_bssid_rssi * rssi_list = NULL;
rssi_list = wlan_find_bssid_in_aver_rssi(priv, bssid);
if(rssi_list)
return wlan_cal_aver_rssi(rssi_list);
else{
return INVALID_RSSI;
}
}
void wlan_set_rssi_dirty(wlan_private * priv)
{
t_aver_bssid_rssi * rssi_list = NULL, *next = NULL;
spin_lock(&rssi_buf_lock);
if(list_empty(&priv->AverRssiQ)){
spin_unlock(&rssi_buf_lock);
return;
}
list_for_each_entry_safe(rssi_list, next, &priv->AverRssiQ, list){
rssi_list->dirty ++;
if(rssi_list->dirty >= MAX_RSSI_RECORD){
if(memcmp(rssi_list->bssid, priv->curbssparams.bssid, 6) != 0){
list_del(&rssi_list->list);
kfree(rssi_list);
}
}
}
spin_unlock(&rssi_buf_lock);
}
void wlan_free_aver_rssi(wlan_private * priv)
{
t_aver_bssid_rssi * rssi_list = NULL, *next = NULL;
spin_lock(&rssi_buf_lock);
if(list_empty(&priv->AverRssiQ)){
spin_unlock(&rssi_buf_lock);
return;
}
list_for_each_entry_safe(rssi_list, next, &priv->AverRssiQ, list){
list_del(&rssi_list->list);
kfree(rssi_list);
}
spin_unlock(&rssi_buf_lock);
}
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