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         priv->command_state = WLAN_CMD_IDLE;
  49         if (priv->free_cmd_queue == CMD_Q_SIZE) {
  50                 /* Command Queue Empty */
  51                 priv->cmd_running = false;
  52                 return true;
  53         }
  54
  55         priv->command = priv->cmd_queue[priv->cmd_dequeue_idx];
  56
  57         ADD_ONE_WITH_WRAP_AROUND(priv->cmd_dequeue_idx, CMD_Q_SIZE);
  58         priv->free_cmd_queue++;
  59         priv->cmd_running = true;
  60
  61         switch (priv->command) {
  62         case WLAN_CMD_INIT_MAC80211:
  63                 priv->command_state = WLAN_CMD_INIT_MAC80211_START;
  64                 break;
  65
  66         case WLAN_CMD_TBTT_WAKEUP:
  67                 priv->command_state = WLAN_CMD_TBTT_WAKEUP_START;
  68                 break;
  69
  70         case WLAN_CMD_BECON_SEND:
  71                 priv->command_state = WLAN_CMD_BECON_SEND_START;
  72                 break;
  73
  74         case WLAN_CMD_SETPOWER:
  75                 priv->command_state = WLAN_CMD_SETPOWER_START;
  76                 break;
  77
  78         case WLAN_CMD_CHANGE_ANTENNA:
  79                 priv->command_state = WLAN_CMD_CHANGE_ANTENNA_START;
  80                 break;
  81
  82         default:
  83                 break;
  84         }
  85
  86         vnt_cmd_timer_wait(priv, 0);
  87
  88         return true;
  89 }
  90
  91 void vnt_run_command(struct work_struct *work)
  92 {
  93         struct vnt_private *priv =
  94                 container_of(work, struct vnt_private, run_command_work.work);
  95
  96         if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
  97                 return;
  98
  99         if (!priv->cmd_running)
 100                 return;
 101
 102         switch (priv->command_state) {
 103         case WLAN_CMD_INIT_MAC80211_START:
 104                 if (priv->mac_hw)
 105                         break;
 106
 107                 dev_info(&priv->usb->dev, "Starting mac80211\n");
 108
 109                 if (vnt_init(priv)) {
 110                         /* If fail all ends TODO retry */
 111                         dev_err(&priv->usb->dev, "failed to start\n");
 112                         ieee80211_free_hw(priv->hw);
 113                         return;
 114                 }
 115
 116                 break;
 117
 118         case WLAN_CMD_TBTT_WAKEUP_START:
 119                 vnt_next_tbtt_wakeup(priv);
 120                 break;
 121
 122         case WLAN_CMD_BECON_SEND_START:
 123                 if (!priv->vif)
 124                         break;
 125
 126                 vnt_beacon_make(priv, priv->vif);
 127
 128                 vnt_mac_reg_bits_on(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 129
 130                 break;
 131
 132         case WLAN_CMD_SETPOWER_START:
 133
 134                 vnt_rf_setpower(priv, priv->current_rate,
 135                                 priv->hw->conf.chandef.chan->hw_value);
 136
 137                 break;
 138
 139         case WLAN_CMD_CHANGE_ANTENNA_START:
 140                 dev_dbg(&priv->usb->dev, "Change from Antenna%d to",
 141                         priv->rx_antenna_sel);
 142
 143                 if (priv->rx_antenna_sel == 0) {
 144                         priv->rx_antenna_sel = 1;
 145                         if (priv->tx_rx_ant_inv)
 146                                 vnt_set_antenna_mode(priv, ANT_RXA);
 147                         else
 148                                 vnt_set_antenna_mode(priv, ANT_RXB);
 149                 } else {
 150                         priv->rx_antenna_sel = 0;
 151                         if (priv->tx_rx_ant_inv)
 152                                 vnt_set_antenna_mode(priv, ANT_RXB);
 153                         else
 154                                 vnt_set_antenna_mode(priv, ANT_RXA);
 155                 }
 156                 break;
 157
 158         default:
 159                 break;
 160         }
 161
 162         vnt_cmd_complete(priv);
 163 }
 164
 165 int vnt_schedule_command(struct vnt_private *priv, enum vnt_cmd command)
 166 {
 167         if (priv->free_cmd_queue == 0)
 168                 return false;
 169
 170         priv->cmd_queue[priv->cmd_enqueue_idx] = command;
 171
 172         ADD_ONE_WITH_WRAP_AROUND(priv->cmd_enqueue_idx, CMD_Q_SIZE);
 173         priv->free_cmd_queue--;
 174
 175         if (!priv->cmd_running)
 176                 vnt_cmd_complete(priv);
 177
 178         return true;
 179 }
 180
 181 void vnt_reset_command_timer(struct vnt_private *priv)
 182 {
 183         priv->free_cmd_queue = CMD_Q_SIZE;
 184         priv->cmd_dequeue_idx = 0;
 185         priv->cmd_enqueue_idx = 0;
 186         priv->command_state = WLAN_CMD_IDLE;
 187         priv->cmd_running = false;
 188 }