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/**
* Copyright (c) 2014 Redpine Signals Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <linux/etherdevice.h>
#include <linux/if.h>
#include <linux/version.h>
#include "rsi_debugfs.h"
#include "rsi_mgmt.h"
#include "rsi_common.h"
#include "rsi_ps.h"
char *str_psstate(enum ps_state state)
{
switch (state) {
case PS_NONE:
return "PS_NONE";
case PS_DISABLE_REQ_SENT:
return "PS_DISABLE_REQ_SENT";
case PS_ENABLE_REQ_SENT:
return "PS_ENABLE_REQ_SENT";
case PS_ENABLED:
return "PS_ENABLED";
default:
return "INVALID_STATE";
}
}
static inline void rsi_modify_ps_state(struct rsi_hw *adapter,
enum ps_state nstate)
{
rsi_dbg(INFO_ZONE, "PS state changed %s => %s\n",
str_psstate(adapter->ps_state),
str_psstate(nstate));
adapter->ps_state = nstate;
}
void rsi_default_ps_params(struct rsi_hw *adapter)
{
struct rsi_ps_info *ps_info = &adapter->ps_info;
ps_info->enabled = true;
ps_info->sleep_type = RSI_SLEEP_TYPE_LP;
ps_info->tx_threshold = 0;
ps_info->rx_threshold = 0;
ps_info->tx_hysterisis = 0;
ps_info->rx_hysterisis = 0;
ps_info->monitor_interval = 0;
ps_info->listen_interval = RSI_DEF_LISTEN_INTERVAL;
ps_info->num_bcns_per_lis_int = 0;
ps_info->dtim_interval_duration = 0;
ps_info->num_dtims_per_sleep = 0;
ps_info->deep_sleep_wakeup_period = RSI_DEF_DS_WAKEUP_PERIOD;
}
void rsi_enable_ps(struct rsi_hw *adapter, struct ieee80211_vif *vif)
{
if (adapter->ps_state != PS_NONE) {
rsi_dbg(ERR_ZONE,
"%s: Cannot accept enable PS in %s state\n",
__func__, str_psstate(adapter->ps_state));
return;
}
if (rsi_send_ps_request(adapter, true, vif)) {
rsi_dbg(ERR_ZONE,
"%s: Failed to send PS request to device\n",
__func__);
return;
}
rsi_modify_ps_state(adapter, PS_ENABLE_REQ_SENT);
}
/* This function is used to disable power save */
void rsi_disable_ps(struct rsi_hw *adapter, struct ieee80211_vif *vif)
{
if (adapter->ps_state != PS_ENABLED) {
rsi_dbg(ERR_ZONE,
"%s: Cannot accept disable PS in %s state\n",
__func__, str_psstate(adapter->ps_state));
return;
}
if (rsi_send_ps_request(adapter, false, vif)) {
rsi_dbg(ERR_ZONE,
"%s: Failed to send PS request to device\n",
__func__);
return;
}
rsi_modify_ps_state(adapter, PS_DISABLE_REQ_SENT);
}
void rsi_conf_uapsd(struct rsi_hw *adapter, struct ieee80211_vif *vif)
{
int ret;
if (adapter->ps_state != PS_ENABLED)
return;
ret = rsi_send_ps_request(adapter, false, vif);
if (!ret)
ret = rsi_send_ps_request(adapter, true, vif);
if (ret)
rsi_dbg(ERR_ZONE,
"%s: Failed to send PS request to device\n",
__func__);
}
int rsi_handle_ps_confirm(struct rsi_hw *adapter, u8 *msg)
{
u16 cfm_type = get_unaligned_le16(msg + PS_CONFIRM_INDEX);
switch (cfm_type) {
case RSI_SLEEP_REQUEST:
if (adapter->ps_state == PS_ENABLE_REQ_SENT)
rsi_modify_ps_state(adapter, PS_ENABLED);
break;
case RSI_WAKEUP_REQUEST:
if (adapter->ps_state == PS_DISABLE_REQ_SENT)
rsi_modify_ps_state(adapter, PS_NONE);
break;
default:
rsi_dbg(ERR_ZONE,
"Invalid PS confirm type %x in state %s\n",
cfm_type, str_psstate(adapter->ps_state));
return -1;
}
return 0;
}
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