]>
Commit | Line | Data |
---|---|---|
5da4b55f MA |
1 | /****************************************************************************** |
2 | * | |
3 | * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved. | |
4 | * | |
5 | * Portions of this file are derived from the ipw3945 project, as well | |
6 | * as portions of the ieee80211 subsystem header files. | |
7 | * | |
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. | |
11 | * | |
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 | |
15 | * more details. | |
16 | * | |
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 | |
20 | * | |
21 | * The full GNU General Public License is included in this distribution in the | |
22 | * file called LICENSE. | |
23 | * | |
24 | * Contact Information: | |
25 | * James P. Ketrenos <ipw2100-admin@linux.intel.com> | |
26 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
27 | *****************************************************************************/ | |
28 | ||
29 | ||
30 | #include <linux/kernel.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/version.h> | |
33 | #include <linux/init.h> | |
34 | ||
35 | #include <net/mac80211.h> | |
36 | ||
37 | #include "iwl-eeprom.h" | |
38 | #include "iwl-4965.h" | |
39 | #include "iwl-core.h" | |
40 | #include "iwl-4965-commands.h" | |
41 | #include "iwl-debug.h" | |
42 | #include "iwl-power.h" | |
43 | #include "iwl-helpers.h" | |
44 | ||
45 | /* | |
46 | * Setting power level allow the card to go to sleep when not busy | |
47 | * there are three factor that decide the power level to go to, they | |
48 | * are list here with its priority | |
49 | * 1- critical_power_setting this will be set according to card temperature. | |
50 | * 2- system_power_setting this will be set by system PM manager. | |
51 | * 3- user_power_setting this will be set by user either by writing to sys or | |
52 | * mac80211 | |
53 | * | |
54 | * if system_power_setting and user_power_setting is set to auto | |
55 | * the power level will be decided according to association status and battery | |
56 | * status. | |
57 | * | |
58 | */ | |
59 | ||
60 | #define MSEC_TO_USEC 1024 | |
61 | #define IWL_POWER_RANGE_0_MAX (2) | |
62 | #define IWL_POWER_RANGE_1_MAX (10) | |
63 | ||
64 | ||
65 | #define NOSLP __constant_cpu_to_le16(0), 0, 0 | |
66 | #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0 | |
67 | #define SLP_TOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC) | |
68 | #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \ | |
69 | __constant_cpu_to_le32(X1), \ | |
70 | __constant_cpu_to_le32(X2), \ | |
71 | __constant_cpu_to_le32(X3), \ | |
72 | __constant_cpu_to_le32(X4)} | |
73 | ||
74 | #define IWL_POWER_ON_BATTERY IWL_POWER_INDEX_5 | |
75 | #define IWL_POWER_ON_AC_DISASSOC IWL_POWER_MODE_CAM | |
76 | #define IWL_POWER_ON_AC_ASSOC IWL_POWER_MODE_CAM | |
77 | ||
78 | ||
79 | #define IWL_CT_KILL_TEMPERATURE 110 | |
80 | #define IWL_MIN_POWER_TEMPERATURE 100 | |
81 | #define IWL_REDUCED_POWER_TEMPERATURE 95 | |
82 | ||
83 | /* default power management (not Tx power) table values */ | |
84 | /* for tim 0-10 */ | |
85 | static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = { | |
86 | {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0}, | |
87 | {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0}, | |
88 | {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0}, | |
89 | {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0}, | |
90 | {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1}, | |
91 | {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2} | |
92 | }; | |
93 | ||
94 | ||
95 | /* for tim = 3-10 */ | |
96 | static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = { | |
97 | {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0}, | |
98 | {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0}, | |
99 | {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0}, | |
100 | {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0}, | |
101 | {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1}, | |
102 | {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 7, 10, 10)}, 2} | |
103 | }; | |
104 | ||
105 | /* for tim > 11 */ | |
106 | static struct iwl_power_vec_entry range_2[IWL_POWER_AC] = { | |
107 | {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0}, | |
108 | {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0}, | |
109 | {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0}, | |
110 | {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0}, | |
111 | {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0}, | |
112 | {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0} | |
113 | }; | |
114 | ||
115 | /* decide the right power level according to association status | |
116 | * and battery status | |
117 | */ | |
118 | static u16 iwl_get_auto_power_mode(struct iwl_priv *priv) | |
119 | { | |
120 | u16 mode = priv->power_data.user_power_setting; | |
121 | ||
122 | switch (priv->power_data.user_power_setting) { | |
123 | case IWL_POWER_AUTO: | |
124 | /* if running on battery */ | |
125 | if (priv->power_data.is_battery_active) | |
126 | mode = IWL_POWER_ON_BATTERY; | |
127 | else if (iwl_is_associated(priv)) | |
128 | mode = IWL_POWER_ON_AC_ASSOC; | |
129 | else | |
130 | mode = IWL_POWER_ON_AC_DISASSOC; | |
131 | break; | |
132 | case IWL_POWER_BATTERY: | |
133 | mode = IWL_POWER_INDEX_3; | |
134 | break; | |
135 | case IWL_POWER_AC: | |
136 | mode = IWL_POWER_MODE_CAM; | |
137 | break; | |
138 | } | |
139 | return mode; | |
140 | } | |
141 | ||
142 | /* initialize to default */ | |
143 | static int iwl_power_init_handle(struct iwl_priv *priv) | |
144 | { | |
145 | int ret = 0, i; | |
146 | struct iwl_power_mgr *pow_data; | |
147 | int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC; | |
148 | u16 pci_pm; | |
149 | ||
150 | IWL_DEBUG_POWER("Initialize power \n"); | |
151 | ||
152 | pow_data = &(priv->power_data); | |
153 | ||
154 | memset(pow_data, 0, sizeof(*pow_data)); | |
155 | ||
156 | memcpy(&pow_data->pwr_range_0[0], &range_0[0], size); | |
157 | memcpy(&pow_data->pwr_range_1[0], &range_1[0], size); | |
158 | memcpy(&pow_data->pwr_range_2[0], &range_2[0], size); | |
159 | ||
160 | ret = pci_read_config_word(priv->pci_dev, | |
161 | PCI_LINK_CTRL, &pci_pm); | |
162 | if (ret != 0) | |
163 | return 0; | |
164 | else { | |
165 | struct iwl4965_powertable_cmd *cmd; | |
166 | ||
167 | IWL_DEBUG_POWER("adjust power command flags\n"); | |
168 | ||
169 | for (i = 0; i < IWL_POWER_AC; i++) { | |
170 | cmd = &pow_data->pwr_range_0[i].cmd; | |
171 | ||
172 | if (pci_pm & 0x1) | |
173 | cmd->flags &= ~IWL_POWER_PCI_PM_MSK; | |
174 | else | |
175 | cmd->flags |= IWL_POWER_PCI_PM_MSK; | |
176 | } | |
177 | } | |
178 | return ret; | |
179 | } | |
180 | ||
181 | /* adjust power command according to dtim period and power level*/ | |
182 | static int iwl_update_power_command(struct iwl_priv *priv, | |
183 | struct iwl4965_powertable_cmd *cmd, | |
184 | u16 mode) | |
185 | { | |
186 | int ret = 0, i; | |
187 | u8 skip; | |
188 | u32 max_sleep = 0; | |
189 | struct iwl_power_vec_entry *range; | |
190 | u8 period = 0; | |
191 | struct iwl_power_mgr *pow_data; | |
192 | ||
193 | if (mode > IWL_POWER_INDEX_5) { | |
194 | IWL_DEBUG_POWER("Error invalid power mode \n"); | |
195 | return -1; | |
196 | } | |
197 | pow_data = &(priv->power_data); | |
198 | ||
199 | if (pow_data->dtim_period <= IWL_POWER_RANGE_0_MAX) | |
200 | range = &pow_data->pwr_range_0[0]; | |
201 | else if (pow_data->dtim_period <= IWL_POWER_RANGE_1_MAX) | |
202 | range = &pow_data->pwr_range_1[0]; | |
203 | else | |
204 | range = &pow_data->pwr_range_2[0]; | |
205 | ||
206 | period = pow_data->dtim_period; | |
207 | memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd)); | |
208 | ||
209 | if (period == 0) { | |
210 | period = 1; | |
211 | skip = 0; | |
212 | } else | |
213 | skip = range[mode].no_dtim; | |
214 | ||
215 | if (skip == 0) { | |
216 | max_sleep = period; | |
217 | cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK; | |
218 | } else { | |
219 | __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]; | |
220 | max_sleep = le32_to_cpu(slp_itrvl); | |
221 | if (max_sleep == 0xFF) | |
222 | max_sleep = period * (skip + 1); | |
223 | else if (max_sleep > period) | |
224 | max_sleep = (le32_to_cpu(slp_itrvl) / period) * period; | |
225 | cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK; | |
226 | } | |
227 | ||
228 | for (i = 0; i < IWL_POWER_VEC_SIZE; i++) { | |
229 | if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep) | |
230 | cmd->sleep_interval[i] = cpu_to_le32(max_sleep); | |
231 | } | |
232 | ||
233 | IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags); | |
234 | IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout)); | |
235 | IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout)); | |
236 | IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n", | |
237 | le32_to_cpu(cmd->sleep_interval[0]), | |
238 | le32_to_cpu(cmd->sleep_interval[1]), | |
239 | le32_to_cpu(cmd->sleep_interval[2]), | |
240 | le32_to_cpu(cmd->sleep_interval[3]), | |
241 | le32_to_cpu(cmd->sleep_interval[4])); | |
242 | ||
243 | return ret; | |
244 | } | |
245 | ||
246 | ||
247 | /* | |
248 | * calucaute the final power mode index | |
249 | */ | |
250 | int iwl_power_update_mode(struct iwl_priv *priv, u8 refresh) | |
251 | { | |
252 | struct iwl_power_mgr *setting = &(priv->power_data); | |
253 | int ret = 0; | |
254 | u16 uninitialized_var(final_mode); | |
255 | ||
256 | /* If on battery, set to 3, | |
257 | * if plugged into AC power, set to CAM ("continuously aware mode"), | |
258 | * else user level */ | |
259 | ||
260 | switch (setting->system_power_setting) { | |
261 | case IWL_POWER_AUTO: | |
262 | final_mode = iwl_get_auto_power_mode(priv); | |
263 | break; | |
264 | case IWL_POWER_BATTERY: | |
265 | final_mode = IWL_POWER_INDEX_3; | |
266 | break; | |
267 | case IWL_POWER_AC: | |
268 | final_mode = IWL_POWER_MODE_CAM; | |
269 | break; | |
270 | default: | |
271 | final_mode = setting->system_power_setting; | |
272 | } | |
273 | ||
274 | if (setting->critical_power_setting > final_mode) | |
275 | final_mode = setting->critical_power_setting; | |
276 | ||
277 | /* driver only support CAM for non STA network */ | |
278 | if (priv->iw_mode != IEEE80211_IF_TYPE_STA) | |
279 | final_mode = IWL_POWER_MODE_CAM; | |
280 | ||
281 | if (!iwl_is_rfkill(priv) && !setting->power_disabled && | |
282 | ((setting->power_mode != final_mode) || refresh)) { | |
283 | struct iwl4965_powertable_cmd cmd; | |
284 | ||
285 | if (final_mode != IWL_POWER_MODE_CAM) | |
286 | set_bit(STATUS_POWER_PMI, &priv->status); | |
287 | ||
288 | iwl_update_power_command(priv, &cmd, final_mode); | |
289 | cmd.keep_alive_beacons = 0; | |
290 | ||
291 | if (final_mode == IWL_POWER_INDEX_5) | |
292 | cmd.flags |= IWL_POWER_FAST_PD; | |
293 | ||
294 | if (priv->cfg->ops->lib->set_power) | |
295 | ret = priv->cfg->ops->lib->set_power(priv, &cmd); | |
296 | ||
297 | if (final_mode == IWL_POWER_MODE_CAM) | |
298 | clear_bit(STATUS_POWER_PMI, &priv->status); | |
299 | else | |
300 | set_bit(STATUS_POWER_PMI, &priv->status); | |
301 | ||
302 | if (priv->cfg->ops->lib->update_chain_flags) | |
303 | priv->cfg->ops->lib->update_chain_flags(priv); | |
304 | ||
305 | if (!ret) | |
306 | setting->power_mode = final_mode; | |
307 | } | |
308 | ||
309 | return ret; | |
310 | } | |
311 | EXPORT_SYMBOL(iwl_power_update_mode); | |
312 | ||
313 | /* Allow other iwl code to disable/enable power management active | |
314 | * this will be usefull for rate scale to disable PM during heavy | |
315 | * Tx/Rx activities | |
316 | */ | |
317 | int iwl_power_disable_management(struct iwl_priv *priv) | |
318 | { | |
319 | u16 prev_mode; | |
320 | int ret = 0; | |
321 | ||
322 | if (priv->power_data.power_disabled) | |
323 | return -EBUSY; | |
324 | ||
325 | prev_mode = priv->power_data.user_power_setting; | |
326 | priv->power_data.user_power_setting = IWL_POWER_MODE_CAM; | |
327 | ret = iwl_power_update_mode(priv, 0); | |
328 | priv->power_data.power_disabled = 1; | |
329 | priv->power_data.user_power_setting = prev_mode; | |
330 | ||
331 | return ret; | |
332 | } | |
333 | EXPORT_SYMBOL(iwl_power_disable_management); | |
334 | ||
335 | /* Allow other iwl code to disable/enable power management active | |
336 | * this will be usefull for rate scale to disable PM during hight | |
337 | * valume activities | |
338 | */ | |
339 | int iwl_power_enable_management(struct iwl_priv *priv) | |
340 | { | |
341 | int ret = 0; | |
342 | ||
343 | priv->power_data.power_disabled = 0; | |
344 | ret = iwl_power_update_mode(priv, 0); | |
345 | return ret; | |
346 | } | |
347 | EXPORT_SYMBOL(iwl_power_enable_management); | |
348 | ||
349 | /* set user_power_setting */ | |
350 | int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode) | |
351 | { | |
352 | int ret = 0; | |
353 | ||
354 | if (mode > IWL_POWER_LIMIT) | |
355 | return -EINVAL; | |
356 | ||
357 | priv->power_data.user_power_setting = mode; | |
358 | ||
359 | ret = iwl_power_update_mode(priv, 0); | |
360 | ||
361 | return ret; | |
362 | } | |
363 | EXPORT_SYMBOL(iwl_power_set_user_mode); | |
364 | ||
365 | ||
366 | /* set system_power_setting. This should be set by over all | |
367 | * PM application. | |
368 | */ | |
369 | int iwl_power_set_system_mode(struct iwl_priv *priv, u16 mode) | |
370 | { | |
371 | int ret = 0; | |
372 | ||
373 | if (mode > IWL_POWER_LIMIT) | |
374 | return -EINVAL; | |
375 | ||
376 | priv->power_data.system_power_setting = mode; | |
377 | ||
378 | ret = iwl_power_update_mode(priv, 0); | |
379 | ||
380 | return ret; | |
381 | } | |
382 | EXPORT_SYMBOL(iwl_power_set_system_mode); | |
383 | ||
384 | /* initilize to default */ | |
385 | void iwl_power_initialize(struct iwl_priv *priv) | |
386 | { | |
387 | ||
388 | iwl_power_init_handle(priv); | |
389 | priv->power_data.user_power_setting = IWL_POWER_AUTO; | |
390 | priv->power_data.power_disabled = 0; | |
391 | priv->power_data.system_power_setting = IWL_POWER_AUTO; | |
392 | priv->power_data.is_battery_active = 0; | |
393 | priv->power_data.power_disabled = 0; | |
394 | priv->power_data.critical_power_setting = 0; | |
395 | } | |
396 | EXPORT_SYMBOL(iwl_power_initialize); | |
397 | ||
398 | /* set critical_power_setting according to temperature value */ | |
399 | int iwl_power_temperature_change(struct iwl_priv *priv) | |
400 | { | |
401 | int ret = 0; | |
402 | u16 new_critical = priv->power_data.critical_power_setting; | |
403 | s32 temperature = KELVIN_TO_CELSIUS(priv->last_temperature); | |
404 | ||
405 | if (temperature > IWL_CT_KILL_TEMPERATURE) | |
406 | return 0; | |
407 | else if (temperature > IWL_MIN_POWER_TEMPERATURE) | |
408 | new_critical = IWL_POWER_INDEX_5; | |
409 | else if (temperature > IWL_REDUCED_POWER_TEMPERATURE) | |
410 | new_critical = IWL_POWER_INDEX_3; | |
411 | else | |
412 | new_critical = IWL_POWER_MODE_CAM; | |
413 | ||
414 | if (new_critical != priv->power_data.critical_power_setting) | |
415 | priv->power_data.critical_power_setting = new_critical; | |
416 | ||
417 | if (priv->power_data.critical_power_setting > | |
418 | priv->power_data.power_mode) | |
419 | ret = iwl_power_update_mode(priv, 0); | |
420 | ||
421 | return ret; | |
422 | } | |
423 | EXPORT_SYMBOL(iwl_power_temperature_change); |