?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
proc: use seq_puts()/seq_putc() where possible
[linux-2.6/next.git] / drivers / net / wireless / rtlwifi / ps.c
blobd2326c13449e08b67945bac5a9662218e313a08d
1 /******************************************************************************
2 *
3 * Copyright(c) 2009-2010 Realtek Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * wlanfae <wlanfae@realtek.com>
23 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
24 * Hsinchu 300, Taiwan.
25 *
26 * Larry Finger <Larry.Finger@lwfinger.net>
27 *
28 *****************************************************************************/
29
30 #include "wifi.h"
31 #include "base.h"
32 #include "ps.h"
33
34 bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
35 {
36 struct rtl_priv *rtlpriv = rtl_priv(hw);
37 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
38 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
39 bool init_status = true;
40
41 /*<1> reset trx ring */
42 if (rtlhal->interface == INTF_PCI)
43 rtlpriv->intf_ops->reset_trx_ring(hw);
44
45 if (is_hal_stop(rtlhal))
46 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
47 ("Driver is already down!\n"));
48
49 /*<2> Enable Adapter */
50 rtlpriv->cfg->ops->hw_init(hw);
51 RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
52 /*init_status = false; */
53
54 /*<3> Enable Interrupt */
55 rtlpriv->cfg->ops->enable_interrupt(hw);
56
57 /*<enable timer> */
58 rtl_watch_dog_timer_callback((unsigned long)hw);
59
60 return init_status;
61 }
62 EXPORT_SYMBOL(rtl_ps_enable_nic);
63
64 bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
65 {
66 bool status = true;
67 struct rtl_priv *rtlpriv = rtl_priv(hw);
68
69 /*<1> Stop all timer */
70 rtl_deinit_deferred_work(hw);
71
72 /*<2> Disable Interrupt */
73 rtlpriv->cfg->ops->disable_interrupt(hw);
74
75 /*<3> Disable Adapter */
76 rtlpriv->cfg->ops->hw_disable(hw);
77
78 return status;
79 }
80 EXPORT_SYMBOL(rtl_ps_disable_nic);
81
82 bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
83 enum rf_pwrstate state_toset,
84 u32 changesource, bool protect_or_not)
85 {
86 struct rtl_priv *rtlpriv = rtl_priv(hw);
87 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
88 enum rf_pwrstate rtstate;
89 bool b_actionallowed = false;
90 u16 rfwait_cnt = 0;
91 unsigned long flag;
92
93 /*protect_or_not = true; */
94
95 if (protect_or_not)
96 goto no_protect;
97
98 /*
99 *Only one thread can change
100 *the RF state at one time, and others
101 *should wait to be executed.
102 */
103 while (true) {
104 spin_lock_irqsave(&rtlpriv->locks.rf_ps_lock, flag);
105 if (ppsc->rfchange_inprogress) {
106 spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock,
107 flag);
108
109 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
110 ("RF Change in progress!"
111 "Wait to set..state_toset(%d).\n",
112 state_toset));
113
114 /* Set RF after the previous action is done. */
115 while (ppsc->rfchange_inprogress) {
116 rfwait_cnt++;
117 mdelay(1);
118
119 /*
120 *Wait too long, return false to avoid
121 *to be stuck here.
122 */
123 if (rfwait_cnt > 100)
124 return false;
125 }
126 } else {
127 ppsc->rfchange_inprogress = true;
128 spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock,
129 flag);
130 break;
131 }
132 }
133
134 no_protect:
135 rtstate = ppsc->rfpwr_state;
136
137 switch (state_toset) {
138 case ERFON:
139 ppsc->rfoff_reason &= (~changesource);
140
141 if ((changesource == RF_CHANGE_BY_HW) &&
142 (ppsc->b_hwradiooff == true)) {
143 ppsc->b_hwradiooff = false;
144 }
145
146 if (!ppsc->rfoff_reason) {
147 ppsc->rfoff_reason = 0;
148 b_actionallowed = true;
149 }
150
151 break;
152
153 case ERFOFF:
154
155 if ((changesource == RF_CHANGE_BY_HW)
156 && (ppsc->b_hwradiooff == false)) {
157 ppsc->b_hwradiooff = true;
158 }
159
160 ppsc->rfoff_reason |= changesource;
161 b_actionallowed = true;
162 break;
163
164 case ERFSLEEP:
165 ppsc->rfoff_reason |= changesource;
166 b_actionallowed = true;
167 break;
168
169 default:
170 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
171 ("switch case not process\n"));
172 break;
173 }
174
175 if (b_actionallowed)
176 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
177
178 if (!protect_or_not) {
179 spin_lock_irqsave(&rtlpriv->locks.rf_ps_lock, flag);
180 ppsc->rfchange_inprogress = false;
181 spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock, flag);
182 }
183
184 return b_actionallowed;
185 }
186 EXPORT_SYMBOL(rtl_ps_set_rf_state);
187
188 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
189 {
190 struct rtl_priv *rtlpriv = rtl_priv(hw);
191 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
192 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
193
194 ppsc->b_swrf_processing = true;
195
196 if (ppsc->inactive_pwrstate == ERFON && rtlhal->interface == INTF_PCI) {
197 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
198 RT_IN_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_ASPM) &&
199 rtlhal->interface == INTF_PCI) {
200 rtlpriv->intf_ops->disable_aspm(hw);
201 RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_ASPM);
202 }
203 }
204
205 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
206 RF_CHANGE_BY_IPS, false);
207
208 if (ppsc->inactive_pwrstate == ERFOFF &&
209 rtlhal->interface == INTF_PCI) {
210 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) {
211 rtlpriv->intf_ops->enable_aspm(hw);
212 RT_SET_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_ASPM);
213 }
214 }
215
216 ppsc->b_swrf_processing = false;
217 }
218
219 void rtl_ips_nic_off_wq_callback(void *data)
220 {
221 struct rtl_works *rtlworks =
222 container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
223 struct ieee80211_hw *hw = rtlworks->hw;
224 struct rtl_priv *rtlpriv = rtl_priv(hw);
225 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
226 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
227 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
228 enum rf_pwrstate rtstate;
229
230 if (mac->opmode != NL80211_IFTYPE_STATION) {
231 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
232 ("not station return\n"));
233 return;
234 }
235
236 if (is_hal_stop(rtlhal))
237 return;
238
239 if (rtlpriv->sec.being_setkey)
240 return;
241
242 if (ppsc->b_inactiveps) {
243 rtstate = ppsc->rfpwr_state;
244
245 /*
246 *Do not enter IPS in the following conditions:
247 *(1) RF is already OFF or Sleep
248 *(2) b_swrf_processing (indicates the IPS is still under going)
249 *(3) Connectted (only disconnected can trigger IPS)
250 *(4) IBSS (send Beacon)
251 *(5) AP mode (send Beacon)
252 *(6) monitor mode (rcv packet)
253 */
254
255 if (rtstate == ERFON &&
256 !ppsc->b_swrf_processing &&
257 (mac->link_state == MAC80211_NOLINK) &&
258 !mac->act_scanning) {
259 RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
260 ("IPSEnter(): Turn off RF.\n"));
261
262 ppsc->inactive_pwrstate = ERFOFF;
263 ppsc->b_in_powersavemode = true;
264
265 /*rtl_pci_reset_trx_ring(hw); */
266 _rtl_ps_inactive_ps(hw);
267 }
268 }
269 }
270
271 void rtl_ips_nic_off(struct ieee80211_hw *hw)
272 {
273 struct rtl_priv *rtlpriv = rtl_priv(hw);
274
275 /*
276 *because when link with ap, mac80211 will ask us
277 *to disable nic quickly after scan before linking,
278 *this will cause link failed, so we delay 100ms here
279 */
280 queue_delayed_work(rtlpriv->works.rtl_wq,
281 &rtlpriv->works.ips_nic_off_wq, MSECS(100));
282 }
283
284 void rtl_ips_nic_on(struct ieee80211_hw *hw)
285 {
286 struct rtl_priv *rtlpriv = rtl_priv(hw);
287 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
288 enum rf_pwrstate rtstate;
289 unsigned long flags;
290
291 spin_lock_irqsave(&rtlpriv->locks.ips_lock, flags);
292
293 if (ppsc->b_inactiveps) {
294 rtstate = ppsc->rfpwr_state;
295
296 if (rtstate != ERFON &&
297 !ppsc->b_swrf_processing &&
298 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
299
300 ppsc->inactive_pwrstate = ERFON;
301 ppsc->b_in_powersavemode = false;
302
303 _rtl_ps_inactive_ps(hw);
304 }
305 }
306
307 spin_unlock_irqrestore(&rtlpriv->locks.ips_lock, flags);
308 }
309
310 /*for FW LPS*/
311
312 /*
313 *Determine if we can set Fw into PS mode
314 *in current condition.Return TRUE if it
315 *can enter PS mode.
316 */
317 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
318 {
319 struct rtl_priv *rtlpriv = rtl_priv(hw);
320 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
321 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
322 u32 ps_timediff;
323
324 ps_timediff = jiffies_to_msecs(jiffies -
325 ppsc->last_delaylps_stamp_jiffies);
326
327 if (ps_timediff < 2000) {
328 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
329 ("Delay enter Fw LPS for DHCP, ARP,"
330 " or EAPOL exchanging state.\n"));
331 return false;
332 }
333
334 if (mac->link_state != MAC80211_LINKED)
335 return false;
336
337 if (mac->opmode == NL80211_IFTYPE_ADHOC)
338 return false;
339
340 return true;
341 }
342
343 /* Change current and default preamble mode.*/
344 static void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
345 {
346 struct rtl_priv *rtlpriv = rtl_priv(hw);
347 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
348 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
349 u8 rpwm_val, fw_pwrmode;
350
351 if (mac->opmode == NL80211_IFTYPE_ADHOC)
352 return;
353
354 if (mac->link_state != MAC80211_LINKED)
355 return;
356
357 if (ppsc->dot11_psmode == rt_psmode)
358 return;
359
360 /* Update power save mode configured. */
361 ppsc->dot11_psmode = rt_psmode;
362
363 /*
364 *<FW control LPS>
365 *1. Enter PS mode
366 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
367 * cmd to set Fw into PS mode.
368 *2. Leave PS mode
369 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active
370 * mode and set RPWM to turn RF on.
371 */
372
373 if ((ppsc->b_fwctrl_lps) && (ppsc->b_leisure_ps) &&
374 ppsc->report_linked) {
375 bool b_fw_current_inps;
376 if (ppsc->dot11_psmode == EACTIVE) {
377 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
378 ("FW LPS leave ps_mode:%x\n",
379 FW_PS_ACTIVE_MODE));
380
381 rpwm_val = 0x0C; /* RF on */
382 fw_pwrmode = FW_PS_ACTIVE_MODE;
383 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_SET_RPWM,
384 (u8 *) (&rpwm_val));
385 rtlpriv->cfg->ops->set_hw_reg(hw,
386 HW_VAR_H2C_FW_PWRMODE,
387 (u8 *) (&fw_pwrmode));
388 b_fw_current_inps = false;
389
390 rtlpriv->cfg->ops->set_hw_reg(hw,
391 HW_VAR_FW_PSMODE_STATUS,
392 (u8 *) (&b_fw_current_inps));
393
394 } else {
395 if (rtl_get_fwlps_doze(hw)) {
396 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
397 ("FW LPS enter ps_mode:%x\n",
398 ppsc->fwctrl_psmode));
399
400 rpwm_val = 0x02; /* RF off */
401 b_fw_current_inps = true;
402 rtlpriv->cfg->ops->set_hw_reg(hw,
403 HW_VAR_FW_PSMODE_STATUS,
404 (u8 *) (&b_fw_current_inps));
405 rtlpriv->cfg->ops->set_hw_reg(hw,
406 HW_VAR_H2C_FW_PWRMODE,
407 (u8 *) (&ppsc->fwctrl_psmode));
408
409 rtlpriv->cfg->ops->set_hw_reg(hw,
410 HW_VAR_SET_RPWM,
411 (u8 *) (&rpwm_val));
412 } else {
413 /* Reset the power save related parameters. */
414 ppsc->dot11_psmode = EACTIVE;
415 }
416 }
417 }
418 }
419
420 /*Enter the leisure power save mode.*/
421 void rtl_lps_enter(struct ieee80211_hw *hw)
422 {
423 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
424 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
425 struct rtl_priv *rtlpriv = rtl_priv(hw);
426 unsigned long flag;
427
428 if (!(ppsc->b_fwctrl_lps && ppsc->b_leisure_ps))
429 return;
430
431 if (rtlpriv->sec.being_setkey)
432 return;
433
434 if (rtlpriv->link_info.b_busytraffic)
435 return;
436
437 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
438 if (mac->cnt_after_linked < 5)
439 return;
440
441 if (mac->opmode == NL80211_IFTYPE_ADHOC)
442 return;
443
444 if (mac->link_state != MAC80211_LINKED)
445 return;
446
447 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
448
449 if (ppsc->b_leisure_ps) {
450 /* Idle for a while if we connect to AP a while ago. */
451 if (mac->cnt_after_linked >= 2) {
452 if (ppsc->dot11_psmode == EACTIVE) {
453 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
454 ("Enter 802.11 power save mode...\n"));
455
456 rtl_lps_set_psmode(hw, EAUTOPS);
457 }
458 }
459 }
460 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
461 }
462
463 /*Leave the leisure power save mode.*/
464 void rtl_lps_leave(struct ieee80211_hw *hw)
465 {
466 struct rtl_priv *rtlpriv = rtl_priv(hw);
467 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
468 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
469 unsigned long flag;
470
471 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
472
473 if (ppsc->b_fwctrl_lps && ppsc->b_leisure_ps) {
474 if (ppsc->dot11_psmode != EACTIVE) {
475
476 /*FIX ME */
477 rtlpriv->cfg->ops->enable_interrupt(hw);
478
479 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
480 RT_IN_PS_LEVEL(ppsc, RT_RF_LPS_LEVEL_ASPM) &&
481 rtlhal->interface == INTF_PCI) {
482 rtlpriv->intf_ops->disable_aspm(hw);
483 RT_CLEAR_PS_LEVEL(ppsc, RT_RF_LPS_LEVEL_ASPM);
484 }
485
486 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
487 ("Busy Traffic,Leave 802.11 power save..\n"));
488
489 rtl_lps_set_psmode(hw, EACTIVE);
490 }
491 }
492 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
493 }
linux-next