Loading...
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 | /*
* 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: dpc.c
*
* Purpose: handle dpc rx functions
*
* Author: Lyndon Chen
*
* Date: May 20, 2003
*
* Functions:
*
* Revision History:
*
*/
#include "device.h"
#include "baseband.h"
#include "rf.h"
#include "dpc.h"
static bool vnt_rx_data(struct vnt_private *priv, struct sk_buff *skb,
u16 bytes_received)
{
struct ieee80211_hw *hw = priv->hw;
struct ieee80211_supported_band *sband;
struct ieee80211_rx_status rx_status = { 0 };
struct ieee80211_hdr *hdr;
__le16 fc;
u8 *rsr, *new_rsr, *rssi;
__le64 *tsf_time;
u16 frame_size;
int ii, r;
u8 *rx_sts, *rx_rate, *sq;
u8 *skb_data;
u8 rate_idx = 0;
u8 rate[MAX_RATE] = {2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108};
long rx_dbm;
/* [31:16]RcvByteCount ( not include 4-byte Status ) */
frame_size = le16_to_cpu(*((__le16 *)(skb->data + 2)));
if (frame_size > 2346 || frame_size < 14) {
dev_dbg(&priv->pcid->dev, "------- WRONG Length 1\n");
return false;
}
skb_data = (u8 *)skb->data;
rx_sts = skb_data;
rx_rate = skb_data + 1;
sband = hw->wiphy->bands[hw->conf.chandef.chan->band];
for (r = RATE_1M; r < MAX_RATE; r++) {
if (*rx_rate == rate[r])
break;
}
priv->rx_rate = r;
for (ii = 0; ii < sband->n_bitrates; ii++) {
if (sband->bitrates[ii].hw_value == r) {
rate_idx = ii;
break;
}
}
if (ii == sband->n_bitrates) {
dev_dbg(&priv->pcid->dev, "Wrong RxRate %x\n", *rx_rate);
return false;
}
tsf_time = (__le64 *)(skb_data + bytes_received - 12);
sq = skb_data + bytes_received - 4;
new_rsr = skb_data + bytes_received - 3;
rssi = skb_data + bytes_received - 2;
rsr = skb_data + bytes_received - 1;
if (*rsr & (RSR_IVLDTYP | RSR_IVLDLEN))
return false;
RFvRSSITodBm(priv, *rssi, &rx_dbm);
priv->byBBPreEDRSSI = (u8)rx_dbm + 1;
priv->uCurrRSSI = *rssi;
skb_pull(skb, 4);
skb_trim(skb, frame_size);
rx_status.mactime = le64_to_cpu(*tsf_time);
rx_status.band = hw->conf.chandef.chan->band;
rx_status.signal = rx_dbm;
rx_status.flag = 0;
rx_status.freq = hw->conf.chandef.chan->center_freq;
if (!(*rsr & RSR_CRCOK))
rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
hdr = (struct ieee80211_hdr *)(skb->data);
fc = hdr->frame_control;
rx_status.rate_idx = rate_idx;
if (ieee80211_has_protected(fc)) {
if (priv->byLocalID > REV_ID_VT3253_A1)
rx_status.flag |= RX_FLAG_DECRYPTED;
/* Drop packet */
if (!(*new_rsr & NEWRSR_DECRYPTOK))
return false;
}
memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
ieee80211_rx_irqsafe(priv->hw, skb);
return true;
}
bool vnt_receive_frame(struct vnt_private *priv, struct vnt_rx_desc *curr_rd)
{
struct vnt_rd_info *rd_info = curr_rd->rd_info;
struct sk_buff *skb;
u16 frame_size;
skb = rd_info->skb;
dma_unmap_single(&priv->pcid->dev, rd_info->skb_dma,
priv->rx_buf_sz, DMA_FROM_DEVICE);
frame_size = le16_to_cpu(curr_rd->rd1.req_count)
- le16_to_cpu(curr_rd->rd0.res_count);
if ((frame_size > 2364) || (frame_size < 33)) {
/* Frame Size error drop this packet.*/
dev_dbg(&priv->pcid->dev, "Wrong frame size %d\n", frame_size);
dev_kfree_skb_irq(skb);
return true;
}
if (vnt_rx_data(priv, skb, frame_size))
return true;
dev_kfree_skb_irq(skb);
return true;
}
|