drivers/staging/vt6656/wcmd.c

   1 /*
   2  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  *
  16  * File: wcmd.c
  17  *
  18  * Purpose: Handles the management command interface functions
  19  *
  20  * Author: Lyndon Chen
  21  *
  22  * Date: May 8, 2003
  23  *
  24  * Functions:
  25  *      vnt_cmd_complete - Command Complete function
  26  *      vnt_schedule_command - Push Command and wait Command Scheduler to do
  27  *      vnt_cmd_timer_wait- Call back timer
  28  *
  29  * Revision History:
  30  *
  31  */
  32
  33 #include "device.h"
  34 #include "mac.h"
  35 #include "wcmd.h"
  36 #include "power.h"
  37 #include "usbpipe.h"
  38 #include "rxtx.h"
  39 #include "rf.h"
  40
  41 static void vnt_cmd_timer_wait(struct vnt_private *priv, unsigned long msecs)
  42 {
  43         schedule_delayed_work(&priv->run_command_work, msecs_to_jiffies(msecs));
  44 }
  45
  46 static int vnt_cmd_complete(struct vnt_private *priv)
  47 {
  48
  49         priv->command_state = WLAN_CMD_IDLE;
  50         if (priv->free_cmd_queue == CMD_Q_SIZE) {
  51                 /* Command Queue Empty */
  52                 priv->cmd_running = false;
  53                 return true;
  54         }
  55
  56         priv->command = priv->cmd_queue[priv->cmd_dequeue_idx];
  57
  58         ADD_ONE_WITH_WRAP_AROUND(priv->cmd_dequeue_idx, CMD_Q_SIZE);
  59         priv->free_cmd_queue++;
  60         priv->cmd_running = true;
  61
  62         switch (priv->command) {
  63         case WLAN_CMD_INIT_MAC80211:
  64                 priv->command_state = WLAN_CMD_INIT_MAC80211_START;
  65                 break;
  66
  67         case WLAN_CMD_TBTT_WAKEUP:
  68                 priv->command_state = WLAN_CMD_TBTT_WAKEUP_START;
  69                 break;
  70
  71         case WLAN_CMD_BECON_SEND:
  72                 priv->command_state = WLAN_CMD_BECON_SEND_START;
  73                 break;
  74
  75         case WLAN_CMD_SETPOWER:
  76                 priv->command_state = WLAN_CMD_SETPOWER_START;
  77                 break;
  78
  79         case WLAN_CMD_CHANGE_ANTENNA:
  80                 priv->command_state = WLAN_CMD_CHANGE_ANTENNA_START;
  81                 break;
  82
  83         default:
  84                 break;
  85         }
  86
  87         vnt_cmd_timer_wait(priv, 0);
  88
  89         return true;
  90 }
  91
  92 void vnt_run_command(struct work_struct *work)
  93 {
  94         struct vnt_private *priv =
  95                 container_of(work, struct vnt_private, run_command_work.work);
  96
  97         if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
  98                 return;
  99
 100         if (!priv->cmd_running)
 101                 return;
 102
 103         switch (priv->command_state) {
 104         case WLAN_CMD_INIT_MAC80211_START:
 105                 if (priv->mac_hw)
 106                         break;
 107
 108                 dev_info(&priv->usb->dev, "Starting mac80211\n");
 109
 110                 if (vnt_init(priv)) {
 111                         /* If fail all ends TODO retry */
 112                         dev_err(&priv->usb->dev, "failed to start\n");
 113                         ieee80211_free_hw(priv->hw);
 114                         return;
 115                 }
 116
 117                 break;
 118
 119         case WLAN_CMD_TBTT_WAKEUP_START:
 120                 vnt_next_tbtt_wakeup(priv);
 121                 break;
 122
 123         case WLAN_CMD_BECON_SEND_START:
 124                 if (!priv->vif)
 125                         break;
 126
 127                 vnt_beacon_make(priv, priv->vif);
 128
 129                 vnt_mac_reg_bits_on(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 130
 131                 break;
 132
 133         case WLAN_CMD_SETPOWER_START:
 134
 135                 vnt_rf_setpower(priv, priv->current_rate,
 136                                 priv->hw->conf.chandef.chan->hw_value);
 137
 138                 break;
 139
 140         case WLAN_CMD_CHANGE_ANTENNA_START:
 141                 dev_dbg(&priv->usb->dev, "Change from Antenna%d to",
 142                                                         priv->rx_antenna_sel);
 143
 144                 if (priv->rx_antenna_sel == 0) {
 145                         priv->rx_antenna_sel = 1;
 146                         if (priv->tx_rx_ant_inv)
 147                                 vnt_set_antenna_mode(priv, ANT_RXA);
 148                         else
 149                                 vnt_set_antenna_mode(priv, ANT_RXB);
 150                 } else {
 151                         priv->rx_antenna_sel = 0;
 152                         if (priv->tx_rx_ant_inv)
 153                                 vnt_set_antenna_mode(priv, ANT_RXB);
 154                         else
 155                                 vnt_set_antenna_mode(priv, ANT_RXA);
 156                 }
 157                 break;
 158
 159         default:
 160                 break;
 161         }
 162
 163         vnt_cmd_complete(priv);
 164 }
 165
 166 int vnt_schedule_command(struct vnt_private *priv, enum vnt_cmd command)
 167 {
 168
 169         if (priv->free_cmd_queue == 0)
 170                 return false;
 171
 172         priv->cmd_queue[priv->cmd_enqueue_idx] = command;
 173
 174         ADD_ONE_WITH_WRAP_AROUND(priv->cmd_enqueue_idx, CMD_Q_SIZE);
 175         priv->free_cmd_queue--;
 176
 177         if (!priv->cmd_running)
 178                 vnt_cmd_complete(priv);
 179
 180         return true;
 181
 182 }
 183
 184 void vnt_reset_command_timer(struct vnt_private *priv)
 185 {
 186         priv->free_cmd_queue = CMD_Q_SIZE;
 187         priv->cmd_dequeue_idx = 0;
 188         priv->cmd_enqueue_idx = 0;
 189         priv->command_state = WLAN_CMD_IDLE;
 190         priv->cmd_running = false;
 191 }