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5da4b55f MA |
1 | /****************************************************************************** |
2 | * | |
01f8162a | 3 | * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. |
5da4b55f MA |
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: | |
759ef89f | 25 | * Intel Linux Wireless <ilw@linux.intel.com> |
5da4b55f MA |
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> | |
5da4b55f MA |
32 | #include <linux/init.h> |
33 | ||
34 | #include <net/mac80211.h> | |
35 | ||
36 | #include "iwl-eeprom.h" | |
3e0d4cb1 | 37 | #include "iwl-dev.h" |
5da4b55f | 38 | #include "iwl-core.h" |
5a36ba0e | 39 | #include "iwl-commands.h" |
5da4b55f MA |
40 | #include "iwl-debug.h" |
41 | #include "iwl-power.h" | |
5da4b55f MA |
42 | |
43 | /* | |
7af2c460 | 44 | * Setting power level allow the card to go to sleep when not busy. |
5da4b55f | 45 | * |
7af2c460 JB |
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. | |
5da4b55f | 49 | * |
7af2c460 JB |
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. | |
5da4b55f MA |
53 | */ |
54 | ||
5da4b55f MA |
55 | #define IWL_POWER_RANGE_0_MAX (2) |
56 | #define IWL_POWER_RANGE_1_MAX (10) | |
57 | ||
58 | ||
7af2c460 JB |
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), \ | |
64 | cpu_to_le32(X1), \ | |
65 | cpu_to_le32(X2), \ | |
66 | cpu_to_le32(X3), \ | |
67 | cpu_to_le32(X4)} | |
5da4b55f | 68 | /* default power management (not Tx power) table values */ |
7af2c460 JB |
69 | /* for DTIM period 0 through IWL_POWER_RANGE_0_MAX */ |
70 | static const struct iwl_power_vec_entry range_0[IWL_POWER_NUM] = { | |
5da4b55f MA |
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} | |
77 | }; | |
78 | ||
79 | ||
7af2c460 JB |
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] = { | |
5da4b55f MA |
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} | |
88 | }; | |
89 | ||
7af2c460 JB |
90 | /* for DTIM period > IWL_POWER_RANGE_1_MAX */ |
91 | static const struct iwl_power_vec_entry range_2[IWL_POWER_NUM] = { | |
5da4b55f MA |
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} | |
98 | }; | |
99 | ||
d25aabb0 | 100 | |
ca579617 MA |
101 | /* set card power command */ |
102 | static int iwl_set_power(struct iwl_priv *priv, void *cmd) | |
103 | { | |
f0f74a0e JB |
104 | return iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, |
105 | sizeof(struct iwl_powertable_cmd), cmd); | |
ca579617 | 106 | } |
5da4b55f MA |
107 | |
108 | /* initialize to default */ | |
5cd19c5f | 109 | static void iwl_power_init_handle(struct iwl_priv *priv) |
5da4b55f | 110 | { |
5da4b55f | 111 | struct iwl_power_mgr *pow_data; |
7af2c460 | 112 | int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_NUM; |
e7b63581 TW |
113 | struct iwl_powertable_cmd *cmd; |
114 | int i; | |
3fdb68de | 115 | u16 lctl; |
5da4b55f | 116 | |
e1623446 | 117 | IWL_DEBUG_POWER(priv, "Initialize power \n"); |
5da4b55f | 118 | |
5cd19c5f | 119 | pow_data = &priv->power_data; |
5da4b55f MA |
120 | |
121 | memset(pow_data, 0, sizeof(*pow_data)); | |
122 | ||
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); | |
126 | ||
3fdb68de | 127 | lctl = iwl_pcie_link_ctl(priv); |
5da4b55f | 128 | |
e1623446 | 129 | IWL_DEBUG_POWER(priv, "adjust power command flags\n"); |
5da4b55f | 130 | |
7af2c460 | 131 | for (i = 0; i < IWL_POWER_NUM; i++) { |
e7b63581 | 132 | cmd = &pow_data->pwr_range_0[i].cmd; |
5da4b55f | 133 | |
3fdb68de | 134 | if (lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN) |
e7b63581 TW |
135 | cmd->flags &= ~IWL_POWER_PCI_PM_MSK; |
136 | else | |
137 | cmd->flags |= IWL_POWER_PCI_PM_MSK; | |
5da4b55f | 138 | } |
5da4b55f MA |
139 | } |
140 | ||
a96a27f9 | 141 | /* adjust power command according to DTIM period and power level*/ |
5cd19c5f WT |
142 | static int iwl_update_power_cmd(struct iwl_priv *priv, |
143 | struct iwl_powertable_cmd *cmd, u16 mode) | |
5da4b55f | 144 | { |
5da4b55f | 145 | struct iwl_power_vec_entry *range; |
5da4b55f | 146 | struct iwl_power_mgr *pow_data; |
5cd19c5f WT |
147 | int i; |
148 | u32 max_sleep = 0; | |
149 | u8 period; | |
150 | bool skip; | |
5da4b55f MA |
151 | |
152 | if (mode > IWL_POWER_INDEX_5) { | |
e1623446 | 153 | IWL_DEBUG_POWER(priv, "Error invalid power mode \n"); |
5cd19c5f | 154 | return -EINVAL; |
5da4b55f | 155 | } |
5cd19c5f WT |
156 | |
157 | pow_data = &priv->power_data; | |
5da4b55f MA |
158 | |
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]; | |
163 | else | |
164 | range = &pow_data->pwr_range_2[0]; | |
165 | ||
166 | period = pow_data->dtim_period; | |
ca579617 | 167 | memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd)); |
5da4b55f MA |
168 | |
169 | if (period == 0) { | |
170 | period = 1; | |
5cd19c5f | 171 | skip = false; |
5da4b55f | 172 | } else { |
5cd19c5f WT |
173 | skip = !!range[mode].no_dtim; |
174 | } | |
175 | ||
176 | if (skip) { | |
5da4b55f MA |
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; | |
5cd19c5f WT |
184 | } else { |
185 | max_sleep = period; | |
186 | cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK; | |
5da4b55f MA |
187 | } |
188 | ||
5cd19c5f | 189 | for (i = 0; i < IWL_POWER_VEC_SIZE; i++) |
5da4b55f MA |
190 | if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep) |
191 | cmd->sleep_interval[i] = cpu_to_le32(max_sleep); | |
5da4b55f | 192 | |
e1623446 TW |
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", | |
5da4b55f MA |
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])); | |
202 | ||
5cd19c5f | 203 | return 0; |
5da4b55f MA |
204 | } |
205 | ||
206 | ||
207 | /* | |
a33c2f47 | 208 | * compute the final power mode index |
5da4b55f | 209 | */ |
04816448 | 210 | int iwl_power_update_mode(struct iwl_priv *priv, bool force) |
5da4b55f MA |
211 | { |
212 | struct iwl_power_mgr *setting = &(priv->power_data); | |
213 | int ret = 0; | |
214 | u16 uninitialized_var(final_mode); | |
a71c8f62 | 215 | bool update_chains; |
5da4b55f | 216 | |
04816448 | 217 | /* Don't update the RX chain when chain noise calibration is running */ |
a71c8f62 WT |
218 | update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE || |
219 | priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE; | |
04816448 | 220 | |
7af2c460 | 221 | final_mode = priv->power_data.user_power_setting; |
5da4b55f | 222 | |
7af2c460 | 223 | if (setting->power_disabled) |
5da4b55f MA |
224 | final_mode = IWL_POWER_MODE_CAM; |
225 | ||
7af2c460 | 226 | if (iwl_is_ready_rf(priv) && |
04816448 | 227 | ((setting->power_mode != final_mode) || force)) { |
ca579617 | 228 | struct iwl_powertable_cmd cmd; |
5da4b55f MA |
229 | |
230 | if (final_mode != IWL_POWER_MODE_CAM) | |
231 | set_bit(STATUS_POWER_PMI, &priv->status); | |
232 | ||
5cd19c5f | 233 | iwl_update_power_cmd(priv, &cmd, final_mode); |
5da4b55f MA |
234 | cmd.keep_alive_beacons = 0; |
235 | ||
236 | if (final_mode == IWL_POWER_INDEX_5) | |
237 | cmd.flags |= IWL_POWER_FAST_PD; | |
238 | ||
ca579617 | 239 | ret = iwl_set_power(priv, &cmd); |
5da4b55f MA |
240 | |
241 | if (final_mode == IWL_POWER_MODE_CAM) | |
242 | clear_bit(STATUS_POWER_PMI, &priv->status); | |
5da4b55f | 243 | |
a71c8f62 | 244 | if (priv->cfg->ops->lib->update_chain_flags && update_chains) |
5da4b55f | 245 | priv->cfg->ops->lib->update_chain_flags(priv); |
a71c8f62 | 246 | else |
e1623446 | 247 | IWL_DEBUG_POWER(priv, "Cannot update the power, chain noise " |
a71c8f62 WT |
248 | "calibration running: %d\n", |
249 | priv->chain_noise_data.state); | |
5da4b55f MA |
250 | if (!ret) |
251 | setting->power_mode = final_mode; | |
252 | } | |
253 | ||
254 | return ret; | |
255 | } | |
256 | EXPORT_SYMBOL(iwl_power_update_mode); | |
257 | ||
5da4b55f MA |
258 | /* set user_power_setting */ |
259 | int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode) | |
260 | { | |
7af2c460 | 261 | if (mode >= IWL_POWER_NUM) |
5da4b55f MA |
262 | return -EINVAL; |
263 | ||
264 | priv->power_data.user_power_setting = mode; | |
265 | ||
04816448 | 266 | return iwl_power_update_mode(priv, 0); |
5da4b55f MA |
267 | } |
268 | EXPORT_SYMBOL(iwl_power_set_user_mode); | |
269 | ||
a96a27f9 | 270 | /* initialize to default */ |
5da4b55f MA |
271 | void iwl_power_initialize(struct iwl_priv *priv) |
272 | { | |
5da4b55f | 273 | iwl_power_init_handle(priv); |
7af2c460 JB |
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; | |
5da4b55f MA |
277 | } |
278 | EXPORT_SYMBOL(iwl_power_initialize); |