tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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: int.c
17 *
18 * Purpose: Handle USB interrupt endpoint
19 *
20 * Author: Jerry Chen
21 *
22 * Date: Apr. 2, 2004
23 *
24 * Functions:
25 *
26 * Revision History:
27 * 04-02-2004 Jerry Chen: Initial release
28 *
29 */
30
31#include "int.h"
32#include "mac.h"
33#include "power.h"
34#include "usbpipe.h"
35
36static const u8 fallback_rate0[5][5] = {
37 {RATE_18M, RATE_18M, RATE_12M, RATE_12M, RATE_12M},
38 {RATE_24M, RATE_24M, RATE_18M, RATE_12M, RATE_12M},
39 {RATE_36M, RATE_36M, RATE_24M, RATE_18M, RATE_18M},
40 {RATE_48M, RATE_48M, RATE_36M, RATE_24M, RATE_24M},
41 {RATE_54M, RATE_54M, RATE_48M, RATE_36M, RATE_36M}
42};
43
44static const u8 fallback_rate1[5][5] = {
45 {RATE_18M, RATE_18M, RATE_12M, RATE_6M, RATE_6M},
46 {RATE_24M, RATE_24M, RATE_18M, RATE_6M, RATE_6M},
47 {RATE_36M, RATE_36M, RATE_24M, RATE_12M, RATE_12M},
48 {RATE_48M, RATE_48M, RATE_24M, RATE_12M, RATE_12M},
49 {RATE_54M, RATE_54M, RATE_36M, RATE_18M, RATE_18M}
50};
51
52void vnt_int_start_interrupt(struct vnt_private *priv)
53{
54 unsigned long flags;
55 int status;
56
57 dev_dbg(&priv->usb->dev, "---->Interrupt Polling Thread\n");
58
59 spin_lock_irqsave(&priv->lock, flags);
60
61 status = vnt_start_interrupt_urb(priv);
62
63 spin_unlock_irqrestore(&priv->lock, flags);
64}
65
66static int vnt_int_report_rate(struct vnt_private *priv, u8 pkt_no, u8 tsr)
67{
68 struct vnt_usb_send_context *context;
69 struct ieee80211_tx_info *info;
70 struct ieee80211_rate *rate;
71 u8 tx_retry = (tsr & 0xf0) >> 4;
72 s8 idx;
73
74 if (pkt_no >= priv->num_tx_context)
75 return -EINVAL;
76
77 context = priv->tx_context[pkt_no];
78
79 if (!context->skb)
80 return -EINVAL;
81
82 info = IEEE80211_SKB_CB(context->skb);
83 idx = info->control.rates[0].idx;
84
85 if (context->fb_option && !(tsr & (TSR_TMO | TSR_RETRYTMO))) {
86 u8 tx_rate;
87 u8 retry = tx_retry;
88
89 rate = ieee80211_get_tx_rate(priv->hw, info);
90 tx_rate = rate->hw_value - RATE_18M;
91
92 if (retry > 4)
93 retry = 4;
94
95 if (context->fb_option == AUTO_FB_0)
96 tx_rate = fallback_rate0[tx_rate][retry];
97 else if (context->fb_option == AUTO_FB_1)
98 tx_rate = fallback_rate1[tx_rate][retry];
99
100 if (info->band == IEEE80211_BAND_5GHZ)
101 idx = tx_rate - RATE_6M;
102 else
103 idx = tx_rate;
104 }
105
106 ieee80211_tx_info_clear_status(info);
107
108 info->status.rates[0].count = tx_retry;
109
110 if (!(tsr & (TSR_TMO | TSR_RETRYTMO))) {
111 info->status.rates[0].idx = idx;
112 info->flags |= IEEE80211_TX_STAT_ACK;
113 }
114
115 ieee80211_tx_status_irqsafe(priv->hw, context->skb);
116
117 context->in_use = false;
118
119 return 0;
120}
121
122void vnt_int_process_data(struct vnt_private *priv)
123{
124 struct vnt_interrupt_data *int_data;
125 struct ieee80211_low_level_stats *low_stats = &priv->low_stats;
126
127 dev_dbg(&priv->usb->dev, "---->s_nsInterruptProcessData\n");
128
129 int_data = (struct vnt_interrupt_data *)priv->int_buf.data_buf;
130
131 if (int_data->tsr0 & TSR_VALID)
132 vnt_int_report_rate(priv, int_data->pkt0, int_data->tsr0);
133
134 if (int_data->tsr1 & TSR_VALID)
135 vnt_int_report_rate(priv, int_data->pkt1, int_data->tsr1);
136
137 if (int_data->tsr2 & TSR_VALID)
138 vnt_int_report_rate(priv, int_data->pkt2, int_data->tsr2);
139
140 if (int_data->tsr3 & TSR_VALID)
141 vnt_int_report_rate(priv, int_data->pkt3, int_data->tsr3);
142
143 if (int_data->isr0 != 0) {
144 if (int_data->isr0 & ISR_BNTX &&
145 priv->op_mode == NL80211_IFTYPE_AP)
146 vnt_schedule_command(priv, WLAN_CMD_BECON_SEND);
147
148 if (int_data->isr0 & ISR_TBTT &&
149 priv->hw->conf.flags & IEEE80211_CONF_PS) {
150 if (!priv->wake_up_count)
151 priv->wake_up_count =
152 priv->hw->conf.listen_interval;
153
154 --priv->wake_up_count;
155
156 /* Turn on wake up to listen next beacon */
157 if (priv->wake_up_count == 1)
158 vnt_schedule_command(priv,
159 WLAN_CMD_TBTT_WAKEUP);
160 }
161 priv->current_tsf = le64_to_cpu(int_data->tsf);
162
163 low_stats->dot11RTSSuccessCount += int_data->rts_success;
164 low_stats->dot11RTSFailureCount += int_data->rts_fail;
165 low_stats->dot11ACKFailureCount += int_data->ack_fail;
166 low_stats->dot11FCSErrorCount += int_data->fcs_err;
167 }
168
169 priv->int_buf.in_use = false;
170}