iwlwifi: split the drivers for agn and legacy devices 3945/4965
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl-hcmd.c
1 /******************************************************************************
2  *
3  * GPL LICENSE SUMMARY
4  *
5  * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of version 2 of the GNU General Public License as
9  * published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful, but
12  * WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19  * USA
20  *
21  * The full GNU General Public License is included in this distribution
22  * in the file called LICENSE.GPL.
23  *
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  *****************************************************************************/
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/sched.h>
32 #include <net/mac80211.h>
33
34 #include "iwl-dev.h" /* FIXME: remove */
35 #include "iwl-debug.h"
36 #include "iwl-eeprom.h"
37 #include "iwl-core.h"
38
39
40 const char *get_cmd_string(u8 cmd)
41 {
42         switch (cmd) {
43                 IWL_CMD(REPLY_ALIVE);
44                 IWL_CMD(REPLY_ERROR);
45                 IWL_CMD(REPLY_RXON);
46                 IWL_CMD(REPLY_RXON_ASSOC);
47                 IWL_CMD(REPLY_QOS_PARAM);
48                 IWL_CMD(REPLY_RXON_TIMING);
49                 IWL_CMD(REPLY_ADD_STA);
50                 IWL_CMD(REPLY_REMOVE_STA);
51                 IWL_CMD(REPLY_REMOVE_ALL_STA);
52                 IWL_CMD(REPLY_TXFIFO_FLUSH);
53                 IWL_CMD(REPLY_WEPKEY);
54                 IWL_CMD(REPLY_3945_RX);
55                 IWL_CMD(REPLY_TX);
56                 IWL_CMD(REPLY_RATE_SCALE);
57                 IWL_CMD(REPLY_LEDS_CMD);
58                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
59                 IWL_CMD(COEX_PRIORITY_TABLE_CMD);
60                 IWL_CMD(COEX_MEDIUM_NOTIFICATION);
61                 IWL_CMD(COEX_EVENT_CMD);
62                 IWL_CMD(REPLY_QUIET_CMD);
63                 IWL_CMD(REPLY_CHANNEL_SWITCH);
64                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
65                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
66                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
67                 IWL_CMD(POWER_TABLE_CMD);
68                 IWL_CMD(PM_SLEEP_NOTIFICATION);
69                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
70                 IWL_CMD(REPLY_SCAN_CMD);
71                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
72                 IWL_CMD(SCAN_START_NOTIFICATION);
73                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
74                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
75                 IWL_CMD(BEACON_NOTIFICATION);
76                 IWL_CMD(REPLY_TX_BEACON);
77                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
78                 IWL_CMD(QUIET_NOTIFICATION);
79                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
80                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
81                 IWL_CMD(REPLY_BT_CONFIG);
82                 IWL_CMD(REPLY_STATISTICS_CMD);
83                 IWL_CMD(STATISTICS_NOTIFICATION);
84                 IWL_CMD(REPLY_CARD_STATE_CMD);
85                 IWL_CMD(CARD_STATE_NOTIFICATION);
86                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
87                 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
88                 IWL_CMD(SENSITIVITY_CMD);
89                 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
90                 IWL_CMD(REPLY_RX_PHY_CMD);
91                 IWL_CMD(REPLY_RX_MPDU_CMD);
92                 IWL_CMD(REPLY_RX);
93                 IWL_CMD(REPLY_COMPRESSED_BA);
94                 IWL_CMD(CALIBRATION_CFG_CMD);
95                 IWL_CMD(CALIBRATION_RES_NOTIFICATION);
96                 IWL_CMD(CALIBRATION_COMPLETE_NOTIFICATION);
97                 IWL_CMD(REPLY_TX_POWER_DBM_CMD);
98                 IWL_CMD(TEMPERATURE_NOTIFICATION);
99                 IWL_CMD(TX_ANT_CONFIGURATION_CMD);
100                 IWL_CMD(REPLY_BT_COEX_PROFILE_NOTIF);
101                 IWL_CMD(REPLY_BT_COEX_PRIO_TABLE);
102                 IWL_CMD(REPLY_BT_COEX_PROT_ENV);
103                 IWL_CMD(REPLY_WIPAN_PARAMS);
104                 IWL_CMD(REPLY_WIPAN_RXON);
105                 IWL_CMD(REPLY_WIPAN_RXON_TIMING);
106                 IWL_CMD(REPLY_WIPAN_RXON_ASSOC);
107                 IWL_CMD(REPLY_WIPAN_QOS_PARAM);
108                 IWL_CMD(REPLY_WIPAN_WEPKEY);
109                 IWL_CMD(REPLY_WIPAN_P2P_CHANNEL_SWITCH);
110                 IWL_CMD(REPLY_WIPAN_NOA_NOTIFICATION);
111                 IWL_CMD(REPLY_WIPAN_DEACTIVATION_COMPLETE);
112         default:
113                 return "UNKNOWN";
114
115         }
116 }
117
118 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
119
120 static void iwl_generic_cmd_callback(struct iwl_priv *priv,
121                                      struct iwl_device_cmd *cmd,
122                                      struct iwl_rx_packet *pkt)
123 {
124         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
125                 IWL_ERR(priv, "Bad return from %s (0x%08X)\n",
126                         get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
127                 return;
128         }
129
130 #ifdef CONFIG_IWLWIFI_DEBUG
131         switch (cmd->hdr.cmd) {
132         case REPLY_TX_LINK_QUALITY_CMD:
133         case SENSITIVITY_CMD:
134                 IWL_DEBUG_HC_DUMP(priv, "back from %s (0x%08X)\n",
135                                 get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
136                 break;
137         default:
138                 IWL_DEBUG_HC(priv, "back from %s (0x%08X)\n",
139                                 get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
140         }
141 #endif
142 }
143
144 static int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
145 {
146         int ret;
147
148         BUG_ON(!(cmd->flags & CMD_ASYNC));
149
150         /* An asynchronous command can not expect an SKB to be set. */
151         BUG_ON(cmd->flags & CMD_WANT_SKB);
152
153         /* Assign a generic callback if one is not provided */
154         if (!cmd->callback)
155                 cmd->callback = iwl_generic_cmd_callback;
156
157         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
158                 return -EBUSY;
159
160         ret = iwl_enqueue_hcmd(priv, cmd);
161         if (ret < 0) {
162                 IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n",
163                           get_cmd_string(cmd->id), ret);
164                 return ret;
165         }
166         return 0;
167 }
168
169 int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
170 {
171         int cmd_idx;
172         int ret;
173
174         BUG_ON(cmd->flags & CMD_ASYNC);
175
176          /* A synchronous command can not have a callback set. */
177         BUG_ON(cmd->callback);
178
179         IWL_DEBUG_INFO(priv, "Attempting to send sync command %s\n",
180                         get_cmd_string(cmd->id));
181         mutex_lock(&priv->sync_cmd_mutex);
182
183         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
184         IWL_DEBUG_INFO(priv, "Setting HCMD_ACTIVE for command %s\n",
185                         get_cmd_string(cmd->id));
186
187         cmd_idx = iwl_enqueue_hcmd(priv, cmd);
188         if (cmd_idx < 0) {
189                 ret = cmd_idx;
190                 IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n",
191                           get_cmd_string(cmd->id), ret);
192                 goto out;
193         }
194
195         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
196                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
197                         HOST_COMPLETE_TIMEOUT);
198         if (!ret) {
199                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
200                         IWL_ERR(priv,
201                                 "Error sending %s: time out after %dms.\n",
202                                 get_cmd_string(cmd->id),
203                                 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
204
205                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
206                         IWL_DEBUG_INFO(priv, "Clearing HCMD_ACTIVE for command %s\n",
207                                        get_cmd_string(cmd->id));
208                         ret = -ETIMEDOUT;
209                         goto cancel;
210                 }
211         }
212
213         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
214                 IWL_ERR(priv, "Command %s aborted: RF KILL Switch\n",
215                                get_cmd_string(cmd->id));
216                 ret = -ECANCELED;
217                 goto fail;
218         }
219         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
220                 IWL_ERR(priv, "Command %s failed: FW Error\n",
221                                get_cmd_string(cmd->id));
222                 ret = -EIO;
223                 goto fail;
224         }
225         if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
226                 IWL_ERR(priv, "Error: Response NULL in '%s'\n",
227                           get_cmd_string(cmd->id));
228                 ret = -EIO;
229                 goto cancel;
230         }
231
232         ret = 0;
233         goto out;
234
235 cancel:
236         if (cmd->flags & CMD_WANT_SKB) {
237                 /*
238                  * Cancel the CMD_WANT_SKB flag for the cmd in the
239                  * TX cmd queue. Otherwise in case the cmd comes
240                  * in later, it will possibly set an invalid
241                  * address (cmd->meta.source).
242                  */
243                 priv->txq[priv->cmd_queue].meta[cmd_idx].flags &=
244                                                         ~CMD_WANT_SKB;
245         }
246 fail:
247         if (cmd->reply_page) {
248                 iwl_free_pages(priv, cmd->reply_page);
249                 cmd->reply_page = 0;
250         }
251 out:
252         mutex_unlock(&priv->sync_cmd_mutex);
253         return ret;
254 }
255
256 int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
257 {
258         if (cmd->flags & CMD_ASYNC)
259                 return iwl_send_cmd_async(priv, cmd);
260
261         return iwl_send_cmd_sync(priv, cmd);
262 }
263
264 int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
265 {
266         struct iwl_host_cmd cmd = {
267                 .id = id,
268                 .len = len,
269                 .data = data,
270         };
271
272         return iwl_send_cmd_sync(priv, &cmd);
273 }
274
275 int iwl_send_cmd_pdu_async(struct iwl_priv *priv,
276                            u8 id, u16 len, const void *data,
277                            void (*callback)(struct iwl_priv *priv,
278                                             struct iwl_device_cmd *cmd,
279                                             struct iwl_rx_packet *pkt))
280 {
281         struct iwl_host_cmd cmd = {
282                 .id = id,
283                 .len = len,
284                 .data = data,
285         };
286
287         cmd.flags |= CMD_ASYNC;
288         cmd.callback = callback;
289
290         return iwl_send_cmd_async(priv, &cmd);
291 }