1 files changed, 271 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlegacy/iwl-hcmd.c b/drivers/net/wireless/iwlegacy/iwl-hcmd.c
new file mode 100644
index 000000000000..62b4b09122cb
--- /dev/null
+++ b/drivers/net/wireless/iwlegacy/iwl-hcmd.c
@@ -0,0 +1,271 @@
+/******************************************************************************
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *****************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <net/mac80211.h>
+
+#include "iwl-dev.h"
+#include "iwl-debug.h"
+#include "iwl-eeprom.h"
+#include "iwl-core.h"
+
+
+const char *iwl_legacy_get_cmd_string(u8 cmd)
+{
+        switch (cmd) {
+                IWL_CMD(REPLY_ALIVE);
+                IWL_CMD(REPLY_ERROR);
+                IWL_CMD(REPLY_RXON);
+                IWL_CMD(REPLY_RXON_ASSOC);
+                IWL_CMD(REPLY_QOS_PARAM);
+                IWL_CMD(REPLY_RXON_TIMING);
+                IWL_CMD(REPLY_ADD_STA);
+                IWL_CMD(REPLY_REMOVE_STA);
+                IWL_CMD(REPLY_WEPKEY);
+                IWL_CMD(REPLY_3945_RX);
+                IWL_CMD(REPLY_TX);
+                IWL_CMD(REPLY_RATE_SCALE);
+                IWL_CMD(REPLY_LEDS_CMD);
+                IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
+                IWL_CMD(REPLY_CHANNEL_SWITCH);
+                IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
+                IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
+                IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
+                IWL_CMD(POWER_TABLE_CMD);
+                IWL_CMD(PM_SLEEP_NOTIFICATION);
+                IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
+                IWL_CMD(REPLY_SCAN_CMD);
+                IWL_CMD(REPLY_SCAN_ABORT_CMD);
+                IWL_CMD(SCAN_START_NOTIFICATION);
+                IWL_CMD(SCAN_RESULTS_NOTIFICATION);
+                IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
+                IWL_CMD(BEACON_NOTIFICATION);
+                IWL_CMD(REPLY_TX_BEACON);
+                IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
+                IWL_CMD(REPLY_BT_CONFIG);
+                IWL_CMD(REPLY_STATISTICS_CMD);
+                IWL_CMD(STATISTICS_NOTIFICATION);
+                IWL_CMD(CARD_STATE_NOTIFICATION);
+                IWL_CMD(MISSED_BEACONS_NOTIFICATION);
+                IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
+                IWL_CMD(SENSITIVITY_CMD);
+                IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
+                IWL_CMD(REPLY_RX_PHY_CMD);
+                IWL_CMD(REPLY_RX_MPDU_CMD);
+                IWL_CMD(REPLY_RX);
+                IWL_CMD(REPLY_COMPRESSED_BA);
+        default:
+                return "UNKNOWN";
+
+        }
+}
+EXPORT_SYMBOL(iwl_legacy_get_cmd_string);
+
+#define HOST_COMPLETE_TIMEOUT (HZ / 2)
+
+static void iwl_legacy_generic_cmd_callback(struct iwl_priv *priv,
+                                     struct iwl_device_cmd *cmd,
+                                     struct iwl_rx_packet *pkt)
+{
+        if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
+                IWL_ERR(priv, "Bad return from %s (0x%08X)\n",
+                iwl_legacy_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
+                return;
+        }
+
+#ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
+        switch (cmd->hdr.cmd) {
+        case REPLY_TX_LINK_QUALITY_CMD:
+        case SENSITIVITY_CMD:
+                IWL_DEBUG_HC_DUMP(priv, "back from %s (0x%08X)\n",
+                iwl_legacy_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
+                break;
+        default:
+                IWL_DEBUG_HC(priv, "back from %s (0x%08X)\n",
+                iwl_legacy_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
+        }
+#endif
+}
+
+static int
+iwl_legacy_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+{
+        int ret;
+
+        BUG_ON(!(cmd->flags & CMD_ASYNC));
+
+        /* An asynchronous command can not expect an SKB to be set. */
+        BUG_ON(cmd->flags & CMD_WANT_SKB);
+
+        /* Assign a generic callback if one is not provided */
+        if (!cmd->callback)
+                cmd->callback = iwl_legacy_generic_cmd_callback;
+
+        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+                return -EBUSY;
+
+        ret = iwl_legacy_enqueue_hcmd(priv, cmd);
+        if (ret < 0) {
+                IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n",
+                          iwl_legacy_get_cmd_string(cmd->id), ret);
+                return ret;
+        }
+        return 0;
+}
+
+int iwl_legacy_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+{
+        int cmd_idx;
+        int ret;
+
+        lockdep_assert_held(&priv->mutex);
+
+        BUG_ON(cmd->flags & CMD_ASYNC);
+
+         /* A synchronous command can not have a callback set. */
+        BUG_ON(cmd->callback);
+
+        IWL_DEBUG_INFO(priv, "Attempting to send sync command %s\n",
+                        iwl_legacy_get_cmd_string(cmd->id));
+
+        set_bit(STATUS_HCMD_ACTIVE, &priv->status);
+        IWL_DEBUG_INFO(priv, "Setting HCMD_ACTIVE for command %s\n",
+                        iwl_legacy_get_cmd_string(cmd->id));
+
+        cmd_idx = iwl_legacy_enqueue_hcmd(priv, cmd);
+        if (cmd_idx < 0) {
+                ret = cmd_idx;
+                IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n",
+                          iwl_legacy_get_cmd_string(cmd->id), ret);
+                goto out;
+        }
+
+        ret = wait_event_interruptible_timeout(priv->wait_command_queue,
+                        !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
+                        HOST_COMPLETE_TIMEOUT);
+        if (!ret) {
+                if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
+                        IWL_ERR(priv,
+                                "Error sending %s: time out after %dms.\n",
+                                iwl_legacy_get_cmd_string(cmd->id),
+                                jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
+
+                        clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
+                        IWL_DEBUG_INFO(priv,
+                                "Clearing HCMD_ACTIVE for command %s\n",
+                                       iwl_legacy_get_cmd_string(cmd->id));
+                        ret = -ETIMEDOUT;
+                        goto cancel;
+                }
+        }
+
+        if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
+                IWL_ERR(priv, "Command %s aborted: RF KILL Switch\n",
+                               iwl_legacy_get_cmd_string(cmd->id));
+                ret = -ECANCELED;
+                goto fail;
+        }
+        if (test_bit(STATUS_FW_ERROR, &priv->status)) {
+                IWL_ERR(priv, "Command %s failed: FW Error\n",
+                               iwl_legacy_get_cmd_string(cmd->id));
+                ret = -EIO;
+                goto fail;
+        }
+        if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
+                IWL_ERR(priv, "Error: Response NULL in '%s'\n",
+                          iwl_legacy_get_cmd_string(cmd->id));
+                ret = -EIO;
+                goto cancel;
+        }
+
+        ret = 0;
+        goto out;
+
+cancel:
+        if (cmd->flags & CMD_WANT_SKB) {
+                /*
+                 * Cancel the CMD_WANT_SKB flag for the cmd in the
+                 * TX cmd queue. Otherwise in case the cmd comes
+                 * in later, it will possibly set an invalid
+                 * address (cmd->meta.source).
+                 */
+                priv->txq[priv->cmd_queue].meta[cmd_idx].flags &=
+                                                        ~CMD_WANT_SKB;
+        }
+fail:
+        if (cmd->reply_page) {
+                iwl_legacy_free_pages(priv, cmd->reply_page);
+                cmd->reply_page = 0;
+        }
+out:
+        return ret;
+}
+EXPORT_SYMBOL(iwl_legacy_send_cmd_sync);
+
+int iwl_legacy_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+{
+        if (cmd->flags & CMD_ASYNC)
+                return iwl_legacy_send_cmd_async(priv, cmd);
+
+        return iwl_legacy_send_cmd_sync(priv, cmd);
+}
+EXPORT_SYMBOL(iwl_legacy_send_cmd);
+
+int
+iwl_legacy_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
+{
+        struct iwl_host_cmd cmd = {
+                .id = id,
+                .len = len,
+                .data = data,
+        };
+
+        return iwl_legacy_send_cmd_sync(priv, &cmd);
+}
+EXPORT_SYMBOL(iwl_legacy_send_cmd_pdu);
+
+int iwl_legacy_send_cmd_pdu_async(struct iwl_priv *priv,
+                           u8 id, u16 len, const void *data,
+                           void (*callback)(struct iwl_priv *priv,
+                                            struct iwl_device_cmd *cmd,
+                                            struct iwl_rx_packet *pkt))
+{
+        struct iwl_host_cmd cmd = {
+                .id = id,
+                .len = len,
+                .data = data,
+        };
+
+        cmd.flags |= CMD_ASYNC;
+        cmd.callback = callback;
+
+        return iwl_legacy_send_cmd_async(priv, &cmd);
+}
+EXPORT_SYMBOL(iwl_legacy_send_cmd_pdu_async);