1 /******************************************************************************
3 * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *****************************************************************************/
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
34 #include <net/mac80211.h>
36 #include "iwl-eeprom.h"
39 #include "iwl-commands.h"
40 #include "iwl-debug.h"
41 #include "iwl-power.h"
44 * Setting power level allow the card to go to sleep when not busy
45 * there are three factor that decide the power level to go to, they
46 * are list here with its priority
47 * 1- critical_power_setting this will be set according to card temperature.
48 * 2- system_power_setting this will be set by system PM manager.
49 * 3- user_power_setting this will be set by user either by writing to sys or
52 * if system_power_setting and user_power_setting is set to auto
53 * the power level will be decided according to association status and battery
58 #define MSEC_TO_USEC 1024
59 #define IWL_POWER_RANGE_0_MAX (2)
60 #define IWL_POWER_RANGE_1_MAX (10)
63 #define NOSLP __constant_cpu_to_le16(0), 0, 0
64 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
65 #define SLP_TOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
66 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
67 __constant_cpu_to_le32(X1), \
68 __constant_cpu_to_le32(X2), \
69 __constant_cpu_to_le32(X3), \
70 __constant_cpu_to_le32(X4)}
72 #define IWL_POWER_ON_BATTERY IWL_POWER_INDEX_5
73 #define IWL_POWER_ON_AC_DISASSOC IWL_POWER_MODE_CAM
74 #define IWL_POWER_ON_AC_ASSOC IWL_POWER_MODE_CAM
77 #define IWL_CT_KILL_TEMPERATURE 110
78 #define IWL_MIN_POWER_TEMPERATURE 100
79 #define IWL_REDUCED_POWER_TEMPERATURE 95
81 /* default power management (not Tx power) table values */
83 static struct iwl_power_vec_entry range_0
[IWL_POWER_MAX
] = {
84 {{NOSLP
, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
85 {{SLP
, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
86 {{SLP
, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
87 {{SLP
, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0},
88 {{SLP
, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1},
89 {{SLP
, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2}
94 static struct iwl_power_vec_entry range_1
[IWL_POWER_MAX
] = {
95 {{NOSLP
, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
96 {{SLP
, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
97 {{SLP
, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0},
98 {{SLP
, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0},
99 {{SLP
, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1},
100 {{SLP
, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 7, 10, 10)}, 2}
104 static struct iwl_power_vec_entry range_2
[IWL_POWER_MAX
] = {
105 {{NOSLP
, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
106 {{SLP
, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
107 {{SLP
, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
108 {{SLP
, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
109 {{SLP
, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
110 {{SLP
, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
113 /* set card power command */
114 static int iwl_set_power(struct iwl_priv
*priv
, void *cmd
)
116 return iwl_send_cmd_pdu_async(priv
, POWER_TABLE_CMD
,
117 sizeof(struct iwl_powertable_cmd
),
120 /* decide the right power level according to association status
123 static u16
iwl_get_auto_power_mode(struct iwl_priv
*priv
)
127 switch (priv
->power_data
.user_power_setting
) {
129 /* if running on battery */
130 if (priv
->power_data
.is_battery_active
)
131 mode
= IWL_POWER_ON_BATTERY
;
132 else if (iwl_is_associated(priv
))
133 mode
= IWL_POWER_ON_AC_ASSOC
;
135 mode
= IWL_POWER_ON_AC_DISASSOC
;
137 /* FIXME: remove battery and ac from here */
138 case IWL_POWER_BATTERY
:
139 mode
= IWL_POWER_INDEX_3
;
142 mode
= IWL_POWER_MODE_CAM
;
145 mode
= priv
->power_data
.user_power_setting
;
151 /* initialize to default */
152 static int iwl_power_init_handle(struct iwl_priv
*priv
)
154 struct iwl_power_mgr
*pow_data
;
155 int size
= sizeof(struct iwl_power_vec_entry
) * IWL_POWER_MAX
;
156 struct iwl_powertable_cmd
*cmd
;
160 IWL_DEBUG_POWER("Initialize power \n");
162 pow_data
= &(priv
->power_data
);
164 memset(pow_data
, 0, sizeof(*pow_data
));
166 memcpy(&pow_data
->pwr_range_0
[0], &range_0
[0], size
);
167 memcpy(&pow_data
->pwr_range_1
[0], &range_1
[0], size
);
168 memcpy(&pow_data
->pwr_range_2
[0], &range_2
[0], size
);
170 pci_read_config_word(priv
->pci_dev
, PCI_CFG_LINK_CTRL
, &pci_pm
);
172 IWL_DEBUG_POWER("adjust power command flags\n");
174 for (i
= 0; i
< IWL_POWER_MAX
; i
++) {
175 cmd
= &pow_data
->pwr_range_0
[i
].cmd
;
177 if (pci_pm
& PCI_CFG_LINK_CTRL_VAL_L0S_EN
)
178 cmd
->flags
&= ~IWL_POWER_PCI_PM_MSK
;
180 cmd
->flags
|= IWL_POWER_PCI_PM_MSK
;
185 /* adjust power command according to DTIM period and power level*/
186 static int iwl_update_power_command(struct iwl_priv
*priv
,
187 struct iwl_powertable_cmd
*cmd
,
193 struct iwl_power_vec_entry
*range
;
195 struct iwl_power_mgr
*pow_data
;
197 if (mode
> IWL_POWER_INDEX_5
) {
198 IWL_DEBUG_POWER("Error invalid power mode \n");
201 pow_data
= &(priv
->power_data
);
203 if (pow_data
->dtim_period
<= IWL_POWER_RANGE_0_MAX
)
204 range
= &pow_data
->pwr_range_0
[0];
205 else if (pow_data
->dtim_period
<= IWL_POWER_RANGE_1_MAX
)
206 range
= &pow_data
->pwr_range_1
[0];
208 range
= &pow_data
->pwr_range_2
[0];
210 period
= pow_data
->dtim_period
;
211 memcpy(cmd
, &range
[mode
].cmd
, sizeof(struct iwl_powertable_cmd
));
217 skip
= range
[mode
].no_dtim
;
221 cmd
->flags
&= ~IWL_POWER_SLEEP_OVER_DTIM_MSK
;
223 __le32 slp_itrvl
= cmd
->sleep_interval
[IWL_POWER_VEC_SIZE
- 1];
224 max_sleep
= le32_to_cpu(slp_itrvl
);
225 if (max_sleep
== 0xFF)
226 max_sleep
= period
* (skip
+ 1);
227 else if (max_sleep
> period
)
228 max_sleep
= (le32_to_cpu(slp_itrvl
) / period
) * period
;
229 cmd
->flags
|= IWL_POWER_SLEEP_OVER_DTIM_MSK
;
232 for (i
= 0; i
< IWL_POWER_VEC_SIZE
; i
++) {
233 if (le32_to_cpu(cmd
->sleep_interval
[i
]) > max_sleep
)
234 cmd
->sleep_interval
[i
] = cpu_to_le32(max_sleep
);
237 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd
->flags
);
238 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd
->tx_data_timeout
));
239 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd
->rx_data_timeout
));
240 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
241 le32_to_cpu(cmd
->sleep_interval
[0]),
242 le32_to_cpu(cmd
->sleep_interval
[1]),
243 le32_to_cpu(cmd
->sleep_interval
[2]),
244 le32_to_cpu(cmd
->sleep_interval
[3]),
245 le32_to_cpu(cmd
->sleep_interval
[4]));
252 * compute the final power mode index
254 int iwl_power_update_mode(struct iwl_priv
*priv
, bool force
)
256 struct iwl_power_mgr
*setting
= &(priv
->power_data
);
258 u16
uninitialized_var(final_mode
);
261 /* Don't update the RX chain when chain noise calibration is running */
262 update_chains
= priv
->chain_noise_data
.state
== IWL_CHAIN_NOISE_DONE
||
263 priv
->chain_noise_data
.state
== IWL_CHAIN_NOISE_ALIVE
;
265 /* If on battery, set to 3,
266 * if plugged into AC power, set to CAM ("continuously aware mode"),
269 switch (setting
->system_power_setting
) {
270 case IWL_POWER_SYS_AUTO
:
271 final_mode
= iwl_get_auto_power_mode(priv
);
273 case IWL_POWER_SYS_BATTERY
:
274 final_mode
= IWL_POWER_INDEX_3
;
276 case IWL_POWER_SYS_AC
:
277 final_mode
= IWL_POWER_MODE_CAM
;
280 final_mode
= IWL_POWER_INDEX_3
;
284 if (setting
->critical_power_setting
> final_mode
)
285 final_mode
= setting
->critical_power_setting
;
287 /* driver only support CAM for non STA network */
288 if (priv
->iw_mode
!= NL80211_IFTYPE_STATION
)
289 final_mode
= IWL_POWER_MODE_CAM
;
291 if (!iwl_is_rfkill(priv
) && !setting
->power_disabled
&&
292 ((setting
->power_mode
!= final_mode
) || force
)) {
293 struct iwl_powertable_cmd cmd
;
295 if (final_mode
!= IWL_POWER_MODE_CAM
)
296 set_bit(STATUS_POWER_PMI
, &priv
->status
);
298 iwl_update_power_command(priv
, &cmd
, final_mode
);
299 cmd
.keep_alive_beacons
= 0;
301 if (final_mode
== IWL_POWER_INDEX_5
)
302 cmd
.flags
|= IWL_POWER_FAST_PD
;
304 ret
= iwl_set_power(priv
, &cmd
);
306 if (final_mode
== IWL_POWER_MODE_CAM
)
307 clear_bit(STATUS_POWER_PMI
, &priv
->status
);
309 set_bit(STATUS_POWER_PMI
, &priv
->status
);
311 if (priv
->cfg
->ops
->lib
->update_chain_flags
&& update_chains
)
312 priv
->cfg
->ops
->lib
->update_chain_flags(priv
);
314 IWL_DEBUG_POWER("Cannot update the power, chain noise "
315 "calibration running: %d\n",
316 priv
->chain_noise_data
.state
);
318 setting
->power_mode
= final_mode
;
323 EXPORT_SYMBOL(iwl_power_update_mode
);
325 /* Allow other iwl code to disable/enable power management active
326 * this will be useful for rate scale to disable PM during heavy
329 int iwl_power_disable_management(struct iwl_priv
*priv
, u32 ms
)
334 if (priv
->power_data
.power_disabled
)
337 prev_mode
= priv
->power_data
.user_power_setting
;
338 priv
->power_data
.user_power_setting
= IWL_POWER_MODE_CAM
;
339 ret
= iwl_power_update_mode(priv
, 0);
340 priv
->power_data
.power_disabled
= 1;
341 priv
->power_data
.user_power_setting
= prev_mode
;
342 cancel_delayed_work(&priv
->set_power_save
);
344 queue_delayed_work(priv
->workqueue
, &priv
->set_power_save
,
345 msecs_to_jiffies(ms
));
350 EXPORT_SYMBOL(iwl_power_disable_management
);
352 /* Allow other iwl code to disable/enable power management active
353 * this will be useful for rate scale to disable PM during high
356 int iwl_power_enable_management(struct iwl_priv
*priv
)
360 priv
->power_data
.power_disabled
= 0;
361 ret
= iwl_power_update_mode(priv
, 0);
364 EXPORT_SYMBOL(iwl_power_enable_management
);
366 /* set user_power_setting */
367 int iwl_power_set_user_mode(struct iwl_priv
*priv
, u16 mode
)
369 if (mode
> IWL_POWER_LIMIT
)
372 priv
->power_data
.user_power_setting
= mode
;
374 return iwl_power_update_mode(priv
, 0);
376 EXPORT_SYMBOL(iwl_power_set_user_mode
);
378 /* set system_power_setting. This should be set by over all
381 int iwl_power_set_system_mode(struct iwl_priv
*priv
, u16 mode
)
383 if (mode
> IWL_POWER_LIMIT
)
386 priv
->power_data
.system_power_setting
= mode
;
388 return iwl_power_update_mode(priv
, 0);
390 EXPORT_SYMBOL(iwl_power_set_system_mode
);
392 /* initialize to default */
393 void iwl_power_initialize(struct iwl_priv
*priv
)
396 iwl_power_init_handle(priv
);
397 priv
->power_data
.user_power_setting
= IWL_POWER_AUTO
;
398 priv
->power_data
.power_disabled
= 0;
399 priv
->power_data
.system_power_setting
= IWL_POWER_SYS_AUTO
;
400 priv
->power_data
.is_battery_active
= 0;
401 priv
->power_data
.power_disabled
= 0;
402 priv
->power_data
.critical_power_setting
= 0;
404 EXPORT_SYMBOL(iwl_power_initialize
);
406 /* set critical_power_setting according to temperature value */
407 int iwl_power_temperature_change(struct iwl_priv
*priv
)
410 u16 new_critical
= priv
->power_data
.critical_power_setting
;
411 s32 temperature
= KELVIN_TO_CELSIUS(priv
->last_temperature
);
413 if (temperature
> IWL_CT_KILL_TEMPERATURE
)
415 else if (temperature
> IWL_MIN_POWER_TEMPERATURE
)
416 new_critical
= IWL_POWER_INDEX_5
;
417 else if (temperature
> IWL_REDUCED_POWER_TEMPERATURE
)
418 new_critical
= IWL_POWER_INDEX_3
;
420 new_critical
= IWL_POWER_MODE_CAM
;
422 if (new_critical
!= priv
->power_data
.critical_power_setting
)
423 priv
->power_data
.critical_power_setting
= new_critical
;
425 if (priv
->power_data
.critical_power_setting
>
426 priv
->power_data
.power_mode
)
427 ret
= iwl_power_update_mode(priv
, 0);
431 EXPORT_SYMBOL(iwl_power_temperature_change
);
433 static void iwl_bg_set_power_save(struct work_struct
*work
)
435 struct iwl_priv
*priv
= container_of(work
,
436 struct iwl_priv
, set_power_save
.work
);
437 IWL_DEBUG(IWL_DL_STATE
, "update power\n");
439 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
))
442 mutex_lock(&priv
->mutex
);
444 /* on starting association we disable power management
445 * until association, if association failed then this
446 * timer will expire and enable PM again.
448 if (!iwl_is_associated(priv
))
449 iwl_power_enable_management(priv
);
451 mutex_unlock(&priv
->mutex
);
453 void iwl_setup_power_deferred_work(struct iwl_priv
*priv
)
455 INIT_DELAYED_WORK(&priv
->set_power_save
, iwl_bg_set_power_save
);
457 EXPORT_SYMBOL(iwl_setup_power_deferred_work
);
459 void iwl_power_cancel_timeout(struct iwl_priv
*priv
)
461 cancel_delayed_work(&priv
->set_power_save
);
463 EXPORT_SYMBOL(iwl_power_cancel_timeout
);