1 /******************************************************************************
5 * Copyright(c) 2008 Intel Corporation. All rights reserved.
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.
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.
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,
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
24 * Contact Information:
25 * Tomas Winkler <tomas.winkler@intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *****************************************************************************/
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/version.h>
32 #include <net/mac80211.h>
34 #include "iwl-4965.h" /* FIXME: remove */
35 #include "iwl-debug.h"
36 #include "iwl-eeprom.h"
40 #define IWL_CMD(x) case x : return #x
42 const char *get_cmd_string(u8 cmd)
48 IWL_CMD(REPLY_RXON_ASSOC);
49 IWL_CMD(REPLY_QOS_PARAM);
50 IWL_CMD(REPLY_RXON_TIMING);
51 IWL_CMD(REPLY_ADD_STA);
52 IWL_CMD(REPLY_REMOVE_STA);
53 IWL_CMD(REPLY_REMOVE_ALL_STA);
55 IWL_CMD(REPLY_RATE_SCALE);
56 IWL_CMD(REPLY_LEDS_CMD);
57 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
58 IWL_CMD(RADAR_NOTIFICATION);
59 IWL_CMD(REPLY_QUIET_CMD);
60 IWL_CMD(REPLY_CHANNEL_SWITCH);
61 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
62 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
63 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
64 IWL_CMD(POWER_TABLE_CMD);
65 IWL_CMD(PM_SLEEP_NOTIFICATION);
66 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
67 IWL_CMD(REPLY_SCAN_CMD);
68 IWL_CMD(REPLY_SCAN_ABORT_CMD);
69 IWL_CMD(SCAN_START_NOTIFICATION);
70 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
71 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
72 IWL_CMD(BEACON_NOTIFICATION);
73 IWL_CMD(REPLY_TX_BEACON);
74 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
75 IWL_CMD(QUIET_NOTIFICATION);
76 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
77 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
78 IWL_CMD(REPLY_BT_CONFIG);
79 IWL_CMD(REPLY_STATISTICS_CMD);
80 IWL_CMD(STATISTICS_NOTIFICATION);
81 IWL_CMD(REPLY_CARD_STATE_CMD);
82 IWL_CMD(CARD_STATE_NOTIFICATION);
83 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
84 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
85 IWL_CMD(SENSITIVITY_CMD);
86 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
87 IWL_CMD(REPLY_RX_PHY_CMD);
88 IWL_CMD(REPLY_RX_MPDU_CMD);
90 IWL_CMD(REPLY_COMPRESSED_BA);
96 EXPORT_SYMBOL(get_cmd_string);
98 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
100 static int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
104 BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
106 /* An asynchronous command can not expect an SKB to be set. */
107 BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
109 /* An asynchronous command MUST have a callback. */
110 BUG_ON(!cmd->meta.u.callback);
112 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
115 ret = priv->cfg->ops->utils->enqueue_hcmd(priv, cmd);
117 IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n",
118 get_cmd_string(cmd->id), ret);
124 int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
128 static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
130 BUG_ON(cmd->meta.flags & CMD_ASYNC);
132 /* A synchronous command can not have a callback set. */
133 BUG_ON(cmd->meta.u.callback != NULL);
135 if (atomic_xchg(&entry, 1)) {
136 IWL_ERROR("Error sending %s: Already sending a host command\n",
137 get_cmd_string(cmd->id));
141 set_bit(STATUS_HCMD_ACTIVE, &priv->status);
143 if (cmd->meta.flags & CMD_WANT_SKB)
144 cmd->meta.source = &cmd->meta;
146 cmd_idx = priv->cfg->ops->utils->enqueue_hcmd(priv, cmd);
149 IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n",
150 get_cmd_string(cmd->id), ret);
154 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
155 !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
156 HOST_COMPLETE_TIMEOUT);
158 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
159 IWL_ERROR("Error sending %s: time out after %dms.\n",
160 get_cmd_string(cmd->id),
161 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
163 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
169 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
170 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
171 get_cmd_string(cmd->id));
175 if (test_bit(STATUS_FW_ERROR, &priv->status)) {
176 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
177 get_cmd_string(cmd->id));
181 if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
182 IWL_ERROR("Error: Response NULL in '%s'\n",
183 get_cmd_string(cmd->id));
192 if (cmd->meta.flags & CMD_WANT_SKB) {
193 struct iwl_cmd *qcmd;
195 /* Cancel the CMD_WANT_SKB flag for the cmd in the
196 * TX cmd queue. Otherwise in case the cmd comes
197 * in later, it will possibly set an invalid
198 * address (cmd->meta.source). */
199 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
200 qcmd->meta.flags &= ~CMD_WANT_SKB;
203 if (cmd->meta.u.skb) {
204 dev_kfree_skb_any(cmd->meta.u.skb);
205 cmd->meta.u.skb = NULL;
208 atomic_set(&entry, 0);
211 EXPORT_SYMBOL(iwl_send_cmd_sync);
213 int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
215 if (cmd->meta.flags & CMD_ASYNC)
216 return iwl_send_cmd_async(priv, cmd);
218 return iwl_send_cmd_sync(priv, cmd);
220 EXPORT_SYMBOL(iwl_send_cmd);
222 int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
224 struct iwl_host_cmd cmd = {
230 return iwl_send_cmd_sync(priv, &cmd);
232 EXPORT_SYMBOL(iwl_send_cmd_pdu);
234 int iwl_send_cmd_pdu_async(struct iwl_priv *priv,
235 u8 id, u16 len, const void *data,
236 int (*callback)(struct iwl_priv *priv,
238 struct sk_buff *skb))
240 struct iwl_host_cmd cmd = {
246 cmd.meta.flags |= CMD_ASYNC;
247 cmd.meta.u.callback = callback;
249 return iwl_send_cmd_async(priv, &cmd);
251 EXPORT_SYMBOL(iwl_send_cmd_pdu_async);