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 * James P. Ketrenos <ipw2100-admin@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/version.h>
33 #include <linux/init.h>
35 #include <net/mac80211.h>
37 #include "iwl-eeprom.h"
40 #include "iwl-commands.h"
41 #include "iwl-debug.h"
42 #include "iwl-power.h"
43 #include "iwl-helpers.h"
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
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
60 #define MSEC_TO_USEC 1024
61 #define IWL_POWER_RANGE_0_MAX (2)
62 #define IWL_POWER_RANGE_1_MAX (10)
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)}
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
79 #define IWL_CT_KILL_TEMPERATURE 110
80 #define IWL_MIN_POWER_TEMPERATURE 100
81 #define IWL_REDUCED_POWER_TEMPERATURE 95
83 /* default power management (not Tx power) table values */
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}
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}
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}
115 /* decide the right power level according to association status
118 static u16 iwl_get_auto_power_mode(struct iwl_priv *priv)
120 u16 mode = priv->power_data.user_power_setting;
122 switch (priv->power_data.user_power_setting) {
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;
130 mode = IWL_POWER_ON_AC_DISASSOC;
132 case IWL_POWER_BATTERY:
133 mode = IWL_POWER_INDEX_3;
136 mode = IWL_POWER_MODE_CAM;
142 /* initialize to default */
143 static int iwl_power_init_handle(struct iwl_priv *priv)
146 struct iwl_power_mgr *pow_data;
147 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
150 IWL_DEBUG_POWER("Initialize power \n");
152 pow_data = &(priv->power_data);
154 memset(pow_data, 0, sizeof(*pow_data));
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);
160 ret = pci_read_config_word(priv->pci_dev,
161 PCI_LINK_CTRL, &pci_pm);
165 struct iwl4965_powertable_cmd *cmd;
167 IWL_DEBUG_POWER("adjust power command flags\n");
169 for (i = 0; i < IWL_POWER_AC; i++) {
170 cmd = &pow_data->pwr_range_0[i].cmd;
173 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
175 cmd->flags |= IWL_POWER_PCI_PM_MSK;
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,
189 struct iwl_power_vec_entry *range;
191 struct iwl_power_mgr *pow_data;
193 if (mode > IWL_POWER_INDEX_5) {
194 IWL_DEBUG_POWER("Error invalid power mode \n");
197 pow_data = &(priv->power_data);
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];
204 range = &pow_data->pwr_range_2[0];
206 period = pow_data->dtim_period;
207 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
213 skip = range[mode].no_dtim;
217 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
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;
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);
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]));
248 * calucaute the final power mode index
250 int iwl_power_update_mode(struct iwl_priv *priv, u8 refresh)
252 struct iwl_power_mgr *setting = &(priv->power_data);
254 u16 uninitialized_var(final_mode);
256 /* If on battery, set to 3,
257 * if plugged into AC power, set to CAM ("continuously aware mode"),
260 switch (setting->system_power_setting) {
262 final_mode = iwl_get_auto_power_mode(priv);
264 case IWL_POWER_BATTERY:
265 final_mode = IWL_POWER_INDEX_3;
268 final_mode = IWL_POWER_MODE_CAM;
271 final_mode = setting->system_power_setting;
274 if (setting->critical_power_setting > final_mode)
275 final_mode = setting->critical_power_setting;
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;
281 if (!iwl_is_rfkill(priv) && !setting->power_disabled &&
282 ((setting->power_mode != final_mode) || refresh)) {
283 struct iwl4965_powertable_cmd cmd;
285 if (final_mode != IWL_POWER_MODE_CAM)
286 set_bit(STATUS_POWER_PMI, &priv->status);
288 iwl_update_power_command(priv, &cmd, final_mode);
289 cmd.keep_alive_beacons = 0;
291 if (final_mode == IWL_POWER_INDEX_5)
292 cmd.flags |= IWL_POWER_FAST_PD;
294 if (priv->cfg->ops->lib->set_power)
295 ret = priv->cfg->ops->lib->set_power(priv, &cmd);
297 if (final_mode == IWL_POWER_MODE_CAM)
298 clear_bit(STATUS_POWER_PMI, &priv->status);
300 set_bit(STATUS_POWER_PMI, &priv->status);
302 if (priv->cfg->ops->lib->update_chain_flags)
303 priv->cfg->ops->lib->update_chain_flags(priv);
306 setting->power_mode = final_mode;
311 EXPORT_SYMBOL(iwl_power_update_mode);
313 /* Allow other iwl code to disable/enable power management active
314 * this will be usefull for rate scale to disable PM during heavy
317 int iwl_power_disable_management(struct iwl_priv *priv)
322 if (priv->power_data.power_disabled)
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;
333 EXPORT_SYMBOL(iwl_power_disable_management);
335 /* Allow other iwl code to disable/enable power management active
336 * this will be usefull for rate scale to disable PM during hight
339 int iwl_power_enable_management(struct iwl_priv *priv)
343 priv->power_data.power_disabled = 0;
344 ret = iwl_power_update_mode(priv, 0);
347 EXPORT_SYMBOL(iwl_power_enable_management);
349 /* set user_power_setting */
350 int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode)
354 if (mode > IWL_POWER_LIMIT)
357 priv->power_data.user_power_setting = mode;
359 ret = iwl_power_update_mode(priv, 0);
363 EXPORT_SYMBOL(iwl_power_set_user_mode);
366 /* set system_power_setting. This should be set by over all
369 int iwl_power_set_system_mode(struct iwl_priv *priv, u16 mode)
373 if (mode > IWL_POWER_LIMIT)
376 priv->power_data.system_power_setting = mode;
378 ret = iwl_power_update_mode(priv, 0);
382 EXPORT_SYMBOL(iwl_power_set_system_mode);
384 /* initilize to default */
385 void iwl_power_initialize(struct iwl_priv *priv)
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;
396 EXPORT_SYMBOL(iwl_power_initialize);
398 /* set critical_power_setting according to temperature value */
399 int iwl_power_temperature_change(struct iwl_priv *priv)
402 u16 new_critical = priv->power_data.critical_power_setting;
403 s32 temperature = KELVIN_TO_CELSIUS(priv->last_temperature);
405 if (temperature > IWL_CT_KILL_TEMPERATURE)
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;
412 new_critical = IWL_POWER_MODE_CAM;
414 if (new_critical != priv->power_data.critical_power_setting)
415 priv->power_data.critical_power_setting = new_critical;
417 if (priv->power_data.critical_power_setting >
418 priv->power_data.power_mode)
419 ret = iwl_power_update_mode(priv, 0);
423 EXPORT_SYMBOL(iwl_power_temperature_change);