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/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"
42 #include "iwl-helpers.h"
45 * Setting power level allow the card to go to sleep when not busy
46 * there are three factor that decide the power level to go to, they
47 * are list here with its priority
48 * 1- critical_power_setting this will be set according to card temperature.
49 * 2- system_power_setting this will be set by system PM manager.
50 * 3- user_power_setting this will be set by user either by writing to sys or
53 * if system_power_setting and user_power_setting is set to auto
54 * the power level will be decided according to association status and battery
59 #define MSEC_TO_USEC 1024
60 #define IWL_POWER_RANGE_0_MAX (2)
61 #define IWL_POWER_RANGE_1_MAX (10)
64 #define NOSLP __constant_cpu_to_le16(0), 0, 0
65 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
66 #define SLP_TOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
67 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
68 __constant_cpu_to_le32(X1), \
69 __constant_cpu_to_le32(X2), \
70 __constant_cpu_to_le32(X3), \
71 __constant_cpu_to_le32(X4)}
73 #define IWL_POWER_ON_BATTERY IWL_POWER_INDEX_5
74 #define IWL_POWER_ON_AC_DISASSOC IWL_POWER_MODE_CAM
75 #define IWL_POWER_ON_AC_ASSOC IWL_POWER_MODE_CAM
78 #define IWL_CT_KILL_TEMPERATURE 110
79 #define IWL_MIN_POWER_TEMPERATURE 100
80 #define IWL_REDUCED_POWER_TEMPERATURE 95
82 /* default power management (not Tx power) table values */
84 static struct iwl_power_vec_entry range_0[IWL_POWER_MAX] = {
85 {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
86 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
87 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
88 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0},
89 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1},
90 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2}
95 static struct iwl_power_vec_entry range_1[IWL_POWER_MAX] = {
96 {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
97 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
98 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0},
99 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0},
100 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1},
101 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 7, 10, 10)}, 2}
105 static struct iwl_power_vec_entry range_2[IWL_POWER_MAX] = {
106 {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
107 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
108 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
109 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
110 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
111 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
114 /* set card power command */
115 static int iwl_set_power(struct iwl_priv *priv, void *cmd)
117 return iwl_send_cmd_pdu_async(priv, POWER_TABLE_CMD,
118 sizeof(struct iwl_powertable_cmd),
121 /* decide the right power level according to association status
124 static u16 iwl_get_auto_power_mode(struct iwl_priv *priv)
128 switch (priv->power_data.user_power_setting) {
130 /* if running on battery */
131 if (priv->power_data.is_battery_active)
132 mode = IWL_POWER_ON_BATTERY;
133 else if (iwl_is_associated(priv))
134 mode = IWL_POWER_ON_AC_ASSOC;
136 mode = IWL_POWER_ON_AC_DISASSOC;
138 /* FIXME: remove battery and ac from here */
139 case IWL_POWER_BATTERY:
140 mode = IWL_POWER_INDEX_3;
143 mode = IWL_POWER_MODE_CAM;
146 mode = priv->power_data.user_power_setting;
152 /* initialize to default */
153 static int iwl_power_init_handle(struct iwl_priv *priv)
156 struct iwl_power_mgr *pow_data;
157 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_MAX;
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 ret = pci_read_config_word(priv->pci_dev,
171 PCI_LINK_CTRL, &pci_pm);
175 struct iwl_powertable_cmd *cmd;
177 IWL_DEBUG_POWER("adjust power command flags\n");
179 for (i = 0; i < IWL_POWER_MAX; i++) {
180 cmd = &pow_data->pwr_range_0[i].cmd;
183 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
185 cmd->flags |= IWL_POWER_PCI_PM_MSK;
191 /* adjust power command according to dtim period and power level*/
192 static int iwl_update_power_command(struct iwl_priv *priv,
193 struct iwl_powertable_cmd *cmd,
199 struct iwl_power_vec_entry *range;
201 struct iwl_power_mgr *pow_data;
203 if (mode > IWL_POWER_INDEX_5) {
204 IWL_DEBUG_POWER("Error invalid power mode \n");
207 pow_data = &(priv->power_data);
209 if (pow_data->dtim_period <= IWL_POWER_RANGE_0_MAX)
210 range = &pow_data->pwr_range_0[0];
211 else if (pow_data->dtim_period <= IWL_POWER_RANGE_1_MAX)
212 range = &pow_data->pwr_range_1[0];
214 range = &pow_data->pwr_range_2[0];
216 period = pow_data->dtim_period;
217 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
223 skip = range[mode].no_dtim;
227 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
229 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
230 max_sleep = le32_to_cpu(slp_itrvl);
231 if (max_sleep == 0xFF)
232 max_sleep = period * (skip + 1);
233 else if (max_sleep > period)
234 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
235 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
238 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
239 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
240 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
243 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
244 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
245 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
246 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
247 le32_to_cpu(cmd->sleep_interval[0]),
248 le32_to_cpu(cmd->sleep_interval[1]),
249 le32_to_cpu(cmd->sleep_interval[2]),
250 le32_to_cpu(cmd->sleep_interval[3]),
251 le32_to_cpu(cmd->sleep_interval[4]));
258 * calucaute the final power mode index
260 int iwl_power_update_mode(struct iwl_priv *priv, u8 refresh)
262 struct iwl_power_mgr *setting = &(priv->power_data);
264 u16 uninitialized_var(final_mode);
266 /* If on battery, set to 3,
267 * if plugged into AC power, set to CAM ("continuously aware mode"),
270 switch (setting->system_power_setting) {
271 case IWL_POWER_SYS_AUTO:
272 final_mode = iwl_get_auto_power_mode(priv);
274 case IWL_POWER_SYS_BATTERY:
275 final_mode = IWL_POWER_INDEX_3;
277 case IWL_POWER_SYS_AC:
278 final_mode = IWL_POWER_MODE_CAM;
281 final_mode = IWL_POWER_INDEX_3;
285 if (setting->critical_power_setting > final_mode)
286 final_mode = setting->critical_power_setting;
288 /* driver only support CAM for non STA network */
289 if (priv->iw_mode != IEEE80211_IF_TYPE_STA)
290 final_mode = IWL_POWER_MODE_CAM;
292 if (!iwl_is_rfkill(priv) && !setting->power_disabled &&
293 ((setting->power_mode != final_mode) || refresh)) {
294 struct iwl_powertable_cmd cmd;
296 if (final_mode != IWL_POWER_MODE_CAM)
297 set_bit(STATUS_POWER_PMI, &priv->status);
299 iwl_update_power_command(priv, &cmd, final_mode);
300 cmd.keep_alive_beacons = 0;
302 if (final_mode == IWL_POWER_INDEX_5)
303 cmd.flags |= IWL_POWER_FAST_PD;
305 ret = iwl_set_power(priv, &cmd);
307 if (final_mode == IWL_POWER_MODE_CAM)
308 clear_bit(STATUS_POWER_PMI, &priv->status);
310 set_bit(STATUS_POWER_PMI, &priv->status);
312 if (priv->cfg->ops->lib->update_chain_flags)
313 priv->cfg->ops->lib->update_chain_flags(priv);
316 setting->power_mode = final_mode;
321 EXPORT_SYMBOL(iwl_power_update_mode);
323 /* Allow other iwl code to disable/enable power management active
324 * this will be usefull for rate scale to disable PM during heavy
327 int iwl_power_disable_management(struct iwl_priv *priv)
332 if (priv->power_data.power_disabled)
335 prev_mode = priv->power_data.user_power_setting;
336 priv->power_data.user_power_setting = IWL_POWER_MODE_CAM;
337 ret = iwl_power_update_mode(priv, 0);
338 priv->power_data.power_disabled = 1;
339 priv->power_data.user_power_setting = prev_mode;
343 EXPORT_SYMBOL(iwl_power_disable_management);
345 /* Allow other iwl code to disable/enable power management active
346 * this will be usefull for rate scale to disable PM during hight
349 int iwl_power_enable_management(struct iwl_priv *priv)
353 priv->power_data.power_disabled = 0;
354 ret = iwl_power_update_mode(priv, 0);
357 EXPORT_SYMBOL(iwl_power_enable_management);
359 /* set user_power_setting */
360 int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode)
364 if (mode > IWL_POWER_LIMIT)
367 priv->power_data.user_power_setting = mode;
369 ret = iwl_power_update_mode(priv, 0);
373 EXPORT_SYMBOL(iwl_power_set_user_mode);
376 /* set system_power_setting. This should be set by over all
379 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 ret = iwl_power_update_mode(priv, 0);
392 EXPORT_SYMBOL(iwl_power_set_system_mode);
394 /* initilize to default */
395 void iwl_power_initialize(struct iwl_priv *priv)
398 iwl_power_init_handle(priv);
399 priv->power_data.user_power_setting = IWL_POWER_AUTO;
400 priv->power_data.power_disabled = 0;
401 priv->power_data.system_power_setting = IWL_POWER_SYS_AUTO;
402 priv->power_data.is_battery_active = 0;
403 priv->power_data.power_disabled = 0;
404 priv->power_data.critical_power_setting = 0;
406 EXPORT_SYMBOL(iwl_power_initialize);
408 /* set critical_power_setting according to temperature value */
409 int iwl_power_temperature_change(struct iwl_priv *priv)
412 u16 new_critical = priv->power_data.critical_power_setting;
413 s32 temperature = KELVIN_TO_CELSIUS(priv->last_temperature);
415 if (temperature > IWL_CT_KILL_TEMPERATURE)
417 else if (temperature > IWL_MIN_POWER_TEMPERATURE)
418 new_critical = IWL_POWER_INDEX_5;
419 else if (temperature > IWL_REDUCED_POWER_TEMPERATURE)
420 new_critical = IWL_POWER_INDEX_3;
422 new_critical = IWL_POWER_MODE_CAM;
424 if (new_critical != priv->power_data.critical_power_setting)
425 priv->power_data.critical_power_setting = new_critical;
427 if (priv->power_data.critical_power_setting >
428 priv->power_data.power_mode)
429 ret = iwl_power_update_mode(priv, 0);
433 EXPORT_SYMBOL(iwl_power_temperature_change);