2 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
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.
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.
17 * Purpose: handle dpc rx functions
34 static bool vnt_rx_data(struct vnt_private *priv, struct sk_buff *skb,
37 struct ieee80211_hw *hw = priv->hw;
38 struct ieee80211_supported_band *sband;
39 struct ieee80211_rx_status rx_status = { 0 };
40 struct ieee80211_hdr *hdr;
42 u8 *rsr, *new_rsr, *rssi;
46 u8 *rx_sts, *rx_rate, *sq;
49 u8 rate[MAX_RATE] = {2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108};
52 /* [31:16]RcvByteCount ( not include 4-byte Status ) */
53 frame_size = le16_to_cpu(*((__le16 *)(skb->data + 2)));
54 if (frame_size > 2346 || frame_size < 14) {
55 dev_dbg(&priv->pcid->dev, "------- WRONG Length 1\n");
59 skb_data = (u8 *)skb->data;
62 rx_rate = skb_data + 1;
64 sband = hw->wiphy->bands[hw->conf.chandef.chan->band];
66 for (r = RATE_1M; r < MAX_RATE; r++) {
67 if (*rx_rate == rate[r])
73 for (ii = 0; ii < sband->n_bitrates; ii++) {
74 if (sband->bitrates[ii].hw_value == r) {
80 if (ii == sband->n_bitrates) {
81 dev_dbg(&priv->pcid->dev, "Wrong RxRate %x\n", *rx_rate);
85 tsf_time = (__le64 *)(skb_data + bytes_received - 12);
86 sq = skb_data + bytes_received - 4;
87 new_rsr = skb_data + bytes_received - 3;
88 rssi = skb_data + bytes_received - 2;
89 rsr = skb_data + bytes_received - 1;
90 if (*rsr & (RSR_IVLDTYP | RSR_IVLDLEN))
93 RFvRSSITodBm(priv, *rssi, &rx_dbm);
95 priv->byBBPreEDRSSI = (u8)rx_dbm + 1;
96 priv->uCurrRSSI = *rssi;
99 skb_trim(skb, frame_size);
101 rx_status.mactime = le64_to_cpu(*tsf_time);
102 rx_status.band = hw->conf.chandef.chan->band;
103 rx_status.signal = rx_dbm;
105 rx_status.freq = hw->conf.chandef.chan->center_freq;
107 if (!(*rsr & RSR_CRCOK))
108 rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
110 hdr = (struct ieee80211_hdr *)(skb->data);
111 fc = hdr->frame_control;
113 rx_status.rate_idx = rate_idx;
115 if (ieee80211_has_protected(fc)) {
116 if (priv->byLocalID > REV_ID_VT3253_A1)
117 rx_status.flag |= RX_FLAG_DECRYPTED;
120 if (!(*new_rsr & NEWRSR_DECRYPTOK))
124 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
126 ieee80211_rx_irqsafe(priv->hw, skb);
131 bool vnt_receive_frame(struct vnt_private *priv, struct vnt_rx_desc *curr_rd)
133 struct vnt_rd_info *rd_info = curr_rd->rd_info;
139 dma_unmap_single(&priv->pcid->dev, rd_info->skb_dma,
140 priv->rx_buf_sz, DMA_FROM_DEVICE);
142 frame_size = le16_to_cpu(curr_rd->rd1.req_count)
143 - le16_to_cpu(curr_rd->rd0.res_count);
145 if ((frame_size > 2364) || (frame_size < 33)) {
146 /* Frame Size error drop this packet.*/
147 dev_dbg(&priv->pcid->dev, "Wrong frame size %d\n", frame_size);
148 dev_kfree_skb_irq(skb);
152 if (vnt_rx_data(priv, skb, frame_size))
155 dev_kfree_skb_irq(skb);