summaryrefslogtreecommitdiff
path: root/drivers/staging/vt6656/int.c
blob: 2ef70e4701f69af603c3c55ad3bb8e1f7a542e60 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
/*
 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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 02110-1301 USA.
 *
 *
 * File: int.c
 *
 * Purpose: Handle USB interrupt endpoint
 *
 * Author: Jerry Chen
 *
 * Date: Apr. 2, 2004
 *
 * Functions:
 *
 * Revision History:
 *      04-02-2004 Jerry Chen:  Initial release
 *
 */

#include "int.h"
#include "mac.h"
#include "power.h"
#include "usbpipe.h"

static const u8 fallback_rate0[5][5] = {
	{RATE_18M, RATE_18M, RATE_12M, RATE_12M, RATE_12M},
	{RATE_24M, RATE_24M, RATE_18M, RATE_12M, RATE_12M},
	{RATE_36M, RATE_36M, RATE_24M, RATE_18M, RATE_18M},
	{RATE_48M, RATE_48M, RATE_36M, RATE_24M, RATE_24M},
	{RATE_54M, RATE_54M, RATE_48M, RATE_36M, RATE_36M}
};

static const u8 fallback_rate1[5][5] = {
	{RATE_18M, RATE_18M, RATE_12M, RATE_6M, RATE_6M},
	{RATE_24M, RATE_24M, RATE_18M, RATE_6M, RATE_6M},
	{RATE_36M, RATE_36M, RATE_24M, RATE_12M, RATE_12M},
	{RATE_48M, RATE_48M, RATE_24M, RATE_12M, RATE_12M},
	{RATE_54M, RATE_54M, RATE_36M, RATE_18M, RATE_18M}
};

void vnt_int_start_interrupt(struct vnt_private *priv)
{
	unsigned long flags;
	int status;

	dev_dbg(&priv->usb->dev, "---->Interrupt Polling Thread\n");

	spin_lock_irqsave(&priv->lock, flags);

	status = vnt_start_interrupt_urb(priv);

	spin_unlock_irqrestore(&priv->lock, flags);
}

static int vnt_int_report_rate(struct vnt_private *priv, u8 pkt_no, u8 tsr)
{
	struct vnt_usb_send_context *context;
	struct ieee80211_tx_info *info;
	struct ieee80211_rate *rate;
	u8 tx_retry = (tsr & 0xf0) >> 4;
	s8 idx;

	if (pkt_no >= priv->num_tx_context)
		return -EINVAL;

	context = priv->tx_context[pkt_no];

	if (!context->skb)
		return -EINVAL;

	info = IEEE80211_SKB_CB(context->skb);
	idx = info->control.rates[0].idx;

	if (context->fb_option && !(tsr & (TSR_TMO | TSR_RETRYTMO))) {
		u8 tx_rate;
		u8 retry = tx_retry;

		rate = ieee80211_get_tx_rate(priv->hw, info);
		tx_rate = rate->hw_value - RATE_18M;

		if (retry > 4)
			retry = 4;

		if (context->fb_option == AUTO_FB_0)
			tx_rate = fallback_rate0[tx_rate][retry];
		else if (context->fb_option == AUTO_FB_1)
			tx_rate = fallback_rate1[tx_rate][retry];

		if (info->band == IEEE80211_BAND_5GHZ)
			idx = tx_rate - RATE_6M;
		else
			idx = tx_rate;
	}

	ieee80211_tx_info_clear_status(info);

	info->status.rates[0].count = tx_retry;

	if (!(tsr & (TSR_TMO | TSR_RETRYTMO))) {
		info->status.rates[0].idx = idx;
		info->flags |= IEEE80211_TX_STAT_ACK;
	}

	ieee80211_tx_status_irqsafe(priv->hw, context->skb);

	context->in_use = false;

	return 0;
}

void vnt_int_process_data(struct vnt_private *priv)
{
	struct vnt_interrupt_data *int_data;
	struct ieee80211_low_level_stats *low_stats = &priv->low_stats;

	dev_dbg(&priv->usb->dev, "---->s_nsInterruptProcessData\n");

	int_data = (struct vnt_interrupt_data *)priv->int_buf.data_buf;

	if (int_data->tsr0 & TSR_VALID)
		vnt_int_report_rate(priv, int_data->pkt0, int_data->tsr0);

	if (int_data->tsr1 & TSR_VALID)
		vnt_int_report_rate(priv, int_data->pkt1, int_data->tsr1);

	if (int_data->tsr2 & TSR_VALID)
		vnt_int_report_rate(priv, int_data->pkt2, int_data->tsr2);

	if (int_data->tsr3 & TSR_VALID)
		vnt_int_report_rate(priv, int_data->pkt3, int_data->tsr3);

	if (int_data->isr0 != 0) {
		if (int_data->isr0 & ISR_BNTX &&
				priv->op_mode == NL80211_IFTYPE_AP)
			vnt_schedule_command(priv, WLAN_CMD_BECON_SEND);

		if (int_data->isr0 & ISR_TBTT) {
			if (priv->hw->conf.flags & IEEE80211_CONF_PS)
				vnt_schedule_command(priv,
							WLAN_CMD_TBTT_WAKEUP);
		}
		priv->current_tsf = le64_to_cpu(int_data->tsf);

		low_stats->dot11RTSSuccessCount += int_data->rts_success;
		low_stats->dot11RTSFailureCount += int_data->rts_fail;
		low_stats->dot11ACKFailureCount += int_data->ack_fail;
		low_stats->dot11FCSErrorCount += int_data->fcs_err;
	}

	priv->int_buf.in_use = false;
}