root/drivers/staging/vt6656/int.c

DEFINITIONS

1. vnt_int_start_interrupt
2. vnt_int_report_rate
3. vnt_int_process_data

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   4  * All rights reserved.
   5  *
   6  * File: int.c
   7  *
   8  * Purpose: Handle USB interrupt endpoint
   9  *
  10  * Author: Jerry Chen
  11  *
  12  * Date: Apr. 2, 2004
  13  *
  14  * Functions:
  15  *
  16  * Revision History:
  17  *      04-02-2004 Jerry Chen:  Initial release
  18  *
  19  */
  20 
  21 #include "int.h"
  22 #include "mac.h"
  23 #include "power.h"
  24 #include "usbpipe.h"
  25 
  26 static const u8 fallback_rate0[5][5] = {
  27         {RATE_18M, RATE_18M, RATE_12M, RATE_12M, RATE_12M},
  28         {RATE_24M, RATE_24M, RATE_18M, RATE_12M, RATE_12M},
  29         {RATE_36M, RATE_36M, RATE_24M, RATE_18M, RATE_18M},
  30         {RATE_48M, RATE_48M, RATE_36M, RATE_24M, RATE_24M},
  31         {RATE_54M, RATE_54M, RATE_48M, RATE_36M, RATE_36M}
  32 };
  33 
  34 static const u8 fallback_rate1[5][5] = {
  35         {RATE_18M, RATE_18M, RATE_12M, RATE_6M, RATE_6M},
  36         {RATE_24M, RATE_24M, RATE_18M, RATE_6M, RATE_6M},
  37         {RATE_36M, RATE_36M, RATE_24M, RATE_12M, RATE_12M},
  38         {RATE_48M, RATE_48M, RATE_24M, RATE_12M, RATE_12M},
  39         {RATE_54M, RATE_54M, RATE_36M, RATE_18M, RATE_18M}
  40 };
  41 
  42 int vnt_int_start_interrupt(struct vnt_private *priv)
  43 {
  44         int ret = 0;
  45         unsigned long flags;
  46 
  47         dev_dbg(&priv->usb->dev, "---->Interrupt Polling Thread\n");
  48 
  49         spin_lock_irqsave(&priv->lock, flags);
  50 
  51         ret = vnt_start_interrupt_urb(priv);
  52 
  53         spin_unlock_irqrestore(&priv->lock, flags);
  54 
  55         return ret;
  56 }
  57 
  58 static int vnt_int_report_rate(struct vnt_private *priv, u8 pkt_no, u8 tsr)
  59 {
  60         struct vnt_usb_send_context *context;
  61         struct ieee80211_tx_info *info;
  62         struct ieee80211_rate *rate;
  63         u8 tx_retry = (tsr & 0xf0) >> 4;
  64         s8 idx;
  65 
  66         if (pkt_no >= priv->num_tx_context)
  67                 return -EINVAL;
  68 
  69         context = priv->tx_context[pkt_no];
  70 
  71         if (!context->skb)
  72                 return -EINVAL;
  73 
  74         info = IEEE80211_SKB_CB(context->skb);
  75         idx = info->control.rates[0].idx;
  76 
  77         if (context->fb_option && !(tsr & (TSR_TMO | TSR_RETRYTMO))) {
  78                 u8 tx_rate;
  79                 u8 retry = tx_retry;
  80 
  81                 rate = ieee80211_get_tx_rate(priv->hw, info);
  82                 tx_rate = rate->hw_value - RATE_18M;
  83 
  84                 if (retry > 4)
  85                         retry = 4;
  86 
  87                 if (context->fb_option == AUTO_FB_0)
  88                         tx_rate = fallback_rate0[tx_rate][retry];
  89                 else if (context->fb_option == AUTO_FB_1)
  90                         tx_rate = fallback_rate1[tx_rate][retry];
  91 
  92                 if (info->band == NL80211_BAND_5GHZ)
  93                         idx = tx_rate - RATE_6M;
  94                 else
  95                         idx = tx_rate;
  96         }
  97 
  98         ieee80211_tx_info_clear_status(info);
  99 
 100         info->status.rates[0].count = tx_retry;
 101 
 102         if (!(tsr & TSR_TMO)) {
 103                 info->status.rates[0].idx = idx;
 104 
 105                 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 106                         info->flags |= IEEE80211_TX_STAT_ACK;
 107         }
 108 
 109         ieee80211_tx_status_irqsafe(priv->hw, context->skb);
 110 
 111         context->in_use = false;
 112 
 113         return 0;
 114 }
 115 
 116 void vnt_int_process_data(struct vnt_private *priv)
 117 {
 118         struct vnt_interrupt_data *int_data;
 119         struct ieee80211_low_level_stats *low_stats = &priv->low_stats;
 120 
 121         dev_dbg(&priv->usb->dev, "---->s_nsInterruptProcessData\n");
 122 
 123         int_data = (struct vnt_interrupt_data *)priv->int_buf.data_buf;
 124 
 125         if (int_data->tsr0 & TSR_VALID)
 126                 vnt_int_report_rate(priv, int_data->pkt0, int_data->tsr0);
 127 
 128         if (int_data->tsr1 & TSR_VALID)
 129                 vnt_int_report_rate(priv, int_data->pkt1, int_data->tsr1);
 130 
 131         if (int_data->tsr2 & TSR_VALID)
 132                 vnt_int_report_rate(priv, int_data->pkt2, int_data->tsr2);
 133 
 134         if (int_data->tsr3 & TSR_VALID)
 135                 vnt_int_report_rate(priv, int_data->pkt3, int_data->tsr3);
 136 
 137         if (int_data->isr0 != 0) {
 138                 if (int_data->isr0 & ISR_BNTX &&
 139                     priv->op_mode == NL80211_IFTYPE_AP)
 140                         vnt_schedule_command(priv, WLAN_CMD_BECON_SEND);
 141 
 142                 if (int_data->isr0 & ISR_TBTT &&
 143                     priv->hw->conf.flags & IEEE80211_CONF_PS) {
 144                         if (!priv->wake_up_count)
 145                                 priv->wake_up_count =
 146                                         priv->hw->conf.listen_interval;
 147 
 148                         if (priv->wake_up_count)
 149                                 --priv->wake_up_count;
 150 
 151                         /* Turn on wake up to listen next beacon */
 152                         if (priv->wake_up_count == 1)
 153                                 vnt_schedule_command(priv,
 154                                                      WLAN_CMD_TBTT_WAKEUP);
 155                 }
 156                 priv->current_tsf = le64_to_cpu(int_data->tsf);
 157 
 158                 low_stats->dot11RTSSuccessCount += int_data->rts_success;
 159                 low_stats->dot11RTSFailureCount += int_data->rts_fail;
 160                 low_stats->dot11ACKFailureCount += int_data->ack_fail;
 161                 low_stats->dot11FCSErrorCount += int_data->fcs_err;
 162         }
 163 
 164         priv->int_buf.in_use = false;
 165 }