1 /** 2 * Copyright (c) 2014 Redpine Signals Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <linux/etherdevice.h> 18 #include <linux/if.h> 19 #include <linux/version.h> 20 #include "rsi_debugfs.h" 21 #include "rsi_mgmt.h" 22 #include "rsi_common.h" 23 #include "rsi_ps.h" 24 25 char *str_psstate(enum ps_state state) 26 { 27 switch (state) { 28 case PS_NONE: 29 return "PS_NONE"; 30 case PS_DISABLE_REQ_SENT: 31 return "PS_DISABLE_REQ_SENT"; 32 case PS_ENABLE_REQ_SENT: 33 return "PS_ENABLE_REQ_SENT"; 34 case PS_ENABLED: 35 return "PS_ENABLED"; 36 default: 37 return "INVALID_STATE"; 38 } 39 } 40 41 static inline void rsi_modify_ps_state(struct rsi_hw *adapter, 42 enum ps_state nstate) 43 { 44 rsi_dbg(INFO_ZONE, "PS state changed %s => %s\n", 45 str_psstate(adapter->ps_state), 46 str_psstate(nstate)); 47 48 adapter->ps_state = nstate; 49 } 50 51 void rsi_default_ps_params(struct rsi_hw *adapter) 52 { 53 struct rsi_ps_info *ps_info = &adapter->ps_info; 54 55 ps_info->enabled = true; 56 ps_info->sleep_type = RSI_SLEEP_TYPE_LP; 57 ps_info->tx_threshold = 0; 58 ps_info->rx_threshold = 0; 59 ps_info->tx_hysterisis = 0; 60 ps_info->rx_hysterisis = 0; 61 ps_info->monitor_interval = 0; 62 ps_info->listen_interval = RSI_DEF_LISTEN_INTERVAL; 63 ps_info->num_bcns_per_lis_int = 0; 64 ps_info->dtim_interval_duration = 0; 65 ps_info->num_dtims_per_sleep = 0; 66 ps_info->deep_sleep_wakeup_period = RSI_DEF_DS_WAKEUP_PERIOD; 67 } 68 69 void rsi_enable_ps(struct rsi_hw *adapter, struct ieee80211_vif *vif) 70 { 71 if (adapter->ps_state != PS_NONE) { 72 rsi_dbg(ERR_ZONE, 73 "%s: Cannot accept enable PS in %s state\n", 74 __func__, str_psstate(adapter->ps_state)); 75 return; 76 } 77 78 if (rsi_send_ps_request(adapter, true, vif)) { 79 rsi_dbg(ERR_ZONE, 80 "%s: Failed to send PS request to device\n", 81 __func__); 82 return; 83 } 84 85 rsi_modify_ps_state(adapter, PS_ENABLE_REQ_SENT); 86 } 87 88 /* This function is used to disable power save */ 89 void rsi_disable_ps(struct rsi_hw *adapter, struct ieee80211_vif *vif) 90 { 91 if (adapter->ps_state != PS_ENABLED) { 92 rsi_dbg(ERR_ZONE, 93 "%s: Cannot accept disable PS in %s state\n", 94 __func__, str_psstate(adapter->ps_state)); 95 return; 96 } 97 98 if (rsi_send_ps_request(adapter, false, vif)) { 99 rsi_dbg(ERR_ZONE, 100 "%s: Failed to send PS request to device\n", 101 __func__); 102 return; 103 } 104 105 rsi_modify_ps_state(adapter, PS_DISABLE_REQ_SENT); 106 } 107 108 void rsi_conf_uapsd(struct rsi_hw *adapter, struct ieee80211_vif *vif) 109 { 110 int ret; 111 112 if (adapter->ps_state != PS_ENABLED) 113 return; 114 115 ret = rsi_send_ps_request(adapter, false, vif); 116 if (!ret) 117 ret = rsi_send_ps_request(adapter, true, vif); 118 if (ret) 119 rsi_dbg(ERR_ZONE, 120 "%s: Failed to send PS request to device\n", 121 __func__); 122 } 123 124 int rsi_handle_ps_confirm(struct rsi_hw *adapter, u8 *msg) 125 { 126 u16 cfm_type = get_unaligned_le16(msg + PS_CONFIRM_INDEX); 127 128 switch (cfm_type) { 129 case RSI_SLEEP_REQUEST: 130 if (adapter->ps_state == PS_ENABLE_REQ_SENT) 131 rsi_modify_ps_state(adapter, PS_ENABLED); 132 break; 133 case RSI_WAKEUP_REQUEST: 134 if (adapter->ps_state == PS_DISABLE_REQ_SENT) 135 rsi_modify_ps_state(adapter, PS_NONE); 136 break; 137 default: 138 rsi_dbg(ERR_ZONE, 139 "Invalid PS confirm type %x in state %s\n", 140 cfm_type, str_psstate(adapter->ps_state)); 141 return -1; 142 } 143 144 return 0; 145 } 146 147