1 /******************************************************************************
3 * Copyright(c) 2007 - 2009 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.
46 * The power level is set to INDEX_1 (the least deep state) by
47 * default, and will, in the future, be the deepest state unless
48 * otherwise required by pm_qos network latency requirements.
50 * Using INDEX_1 without pm_qos is ok because mac80211 will disable
51 * PS when even checking every beacon for the TIM bit would exceed
52 * the required latency.
55 #define IWL_POWER_RANGE_0_MAX (2)
56 #define IWL_POWER_RANGE_1_MAX (10)
59 #define NOSLP cpu_to_le16(0), 0, 0
60 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
61 #define TU_TO_USEC 1024
62 #define SLP_TOUT(T) cpu_to_le32((T) * TU_TO_USEC)
63 #define SLP_VEC(X0, X1, X2, X3, X4) {cpu_to_le32(X0), \
68 /* default power management (not Tx power) table values */
69 /* for DTIM period 0 through IWL_POWER_RANGE_0_MAX */
70 static const struct iwl_power_vec_entry range_0[IWL_POWER_NUM] = {
71 {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
72 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
73 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
74 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0},
75 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1},
76 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2}
80 /* for DTIM period IWL_POWER_RANGE_0_MAX + 1 through IWL_POWER_RANGE_1_MAX */
81 static const struct iwl_power_vec_entry range_1[IWL_POWER_NUM] = {
82 {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
83 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
84 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0},
85 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0},
86 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1},
87 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 7, 10, 10)}, 2}
90 /* for DTIM period > IWL_POWER_RANGE_1_MAX */
91 static const struct iwl_power_vec_entry range_2[IWL_POWER_NUM] = {
92 {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
93 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
94 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
95 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
96 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
97 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
101 /* set card power command */
102 static int iwl_set_power(struct iwl_priv *priv, void *cmd)
104 return iwl_send_cmd_pdu(priv, POWER_TABLE_CMD,
105 sizeof(struct iwl_powertable_cmd), cmd);
108 /* initialize to default */
109 static void iwl_power_init_handle(struct iwl_priv *priv)
111 struct iwl_power_mgr *pow_data;
112 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_NUM;
113 struct iwl_powertable_cmd *cmd;
117 IWL_DEBUG_POWER(priv, "Initialize power \n");
119 pow_data = &priv->power_data;
121 memset(pow_data, 0, sizeof(*pow_data));
123 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
124 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
125 memcpy(&pow_data->pwr_range_2[0], &range_2[0], size);
127 lctl = iwl_pcie_link_ctl(priv);
129 IWL_DEBUG_POWER(priv, "adjust power command flags\n");
131 for (i = 0; i < IWL_POWER_NUM; i++) {
132 cmd = &pow_data->pwr_range_0[i].cmd;
134 if (lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN)
135 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
137 cmd->flags |= IWL_POWER_PCI_PM_MSK;
141 /* adjust power command according to DTIM period and power level*/
142 static int iwl_update_power_cmd(struct iwl_priv *priv,
143 struct iwl_powertable_cmd *cmd, u16 mode)
145 struct iwl_power_vec_entry *range;
146 struct iwl_power_mgr *pow_data;
152 if (mode > IWL_POWER_INDEX_5) {
153 IWL_DEBUG_POWER(priv, "Error invalid power mode \n");
157 pow_data = &priv->power_data;
159 if (pow_data->dtim_period <= IWL_POWER_RANGE_0_MAX)
160 range = &pow_data->pwr_range_0[0];
161 else if (pow_data->dtim_period <= IWL_POWER_RANGE_1_MAX)
162 range = &pow_data->pwr_range_1[0];
164 range = &pow_data->pwr_range_2[0];
166 period = pow_data->dtim_period;
167 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
173 skip = !!range[mode].no_dtim;
177 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
178 max_sleep = le32_to_cpu(slp_itrvl);
179 if (max_sleep == 0xFF)
180 max_sleep = period * (skip + 1);
181 else if (max_sleep > period)
182 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
183 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
186 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
189 for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
190 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
191 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
193 IWL_DEBUG_POWER(priv, "Flags value = 0x%08X\n", cmd->flags);
194 IWL_DEBUG_POWER(priv, "Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
195 IWL_DEBUG_POWER(priv, "Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
196 IWL_DEBUG_POWER(priv, "Sleep interval vector = { %d , %d , %d , %d , %d }\n",
197 le32_to_cpu(cmd->sleep_interval[0]),
198 le32_to_cpu(cmd->sleep_interval[1]),
199 le32_to_cpu(cmd->sleep_interval[2]),
200 le32_to_cpu(cmd->sleep_interval[3]),
201 le32_to_cpu(cmd->sleep_interval[4]));
208 * compute the final power mode index
210 int iwl_power_update_mode(struct iwl_priv *priv, bool force)
212 struct iwl_power_mgr *setting = &(priv->power_data);
214 u16 uninitialized_var(final_mode);
217 /* Don't update the RX chain when chain noise calibration is running */
218 update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE ||
219 priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
221 final_mode = priv->power_data.user_power_setting;
223 if (setting->power_disabled)
224 final_mode = IWL_POWER_MODE_CAM;
226 if (iwl_is_ready_rf(priv) &&
227 ((setting->power_mode != final_mode) || force)) {
228 struct iwl_powertable_cmd cmd;
230 if (final_mode != IWL_POWER_MODE_CAM)
231 set_bit(STATUS_POWER_PMI, &priv->status);
233 iwl_update_power_cmd(priv, &cmd, final_mode);
234 cmd.keep_alive_beacons = 0;
236 if (final_mode == IWL_POWER_INDEX_5)
237 cmd.flags |= IWL_POWER_FAST_PD;
239 ret = iwl_set_power(priv, &cmd);
241 if (final_mode == IWL_POWER_MODE_CAM)
242 clear_bit(STATUS_POWER_PMI, &priv->status);
244 if (priv->cfg->ops->lib->update_chain_flags && update_chains)
245 priv->cfg->ops->lib->update_chain_flags(priv);
247 IWL_DEBUG_POWER(priv, "Cannot update the power, chain noise "
248 "calibration running: %d\n",
249 priv->chain_noise_data.state);
251 setting->power_mode = final_mode;
256 EXPORT_SYMBOL(iwl_power_update_mode);
258 /* set user_power_setting */
259 int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode)
261 if (mode >= IWL_POWER_NUM)
264 priv->power_data.user_power_setting = mode;
266 return iwl_power_update_mode(priv, 0);
268 EXPORT_SYMBOL(iwl_power_set_user_mode);
270 /* initialize to default */
271 void iwl_power_initialize(struct iwl_priv *priv)
273 iwl_power_init_handle(priv);
274 priv->power_data.user_power_setting = IWL_POWER_INDEX_1;
275 /* default to disabled until mac80211 says otherwise */
276 priv->power_data.power_disabled = 1;
278 EXPORT_SYMBOL(iwl_power_initialize);