![Varsha Rao](/assets/img/avatar_default.png)
This patch fixes the checkpatch issue by removing the Free Software Foundation's mailing address from the sample GPL notice. Because the FSF has changed address in the past, and may change again. Linux already includes a copy of the GPL. Signed-off-by: Varsha Rao <rvarsha016@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
159 lines
3.7 KiB
C
159 lines
3.7 KiB
C
/*
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* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* File: dpc.c
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*
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* Purpose: handle dpc rx functions
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*
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* Author: Lyndon Chen
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*
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* Date: May 20, 2003
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*
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* Functions:
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*
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* Revision History:
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*
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*/
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#include "device.h"
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#include "baseband.h"
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#include "rf.h"
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#include "dpc.h"
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static bool vnt_rx_data(struct vnt_private *priv, struct sk_buff *skb,
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u16 bytes_received)
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{
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struct ieee80211_hw *hw = priv->hw;
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struct ieee80211_supported_band *sband;
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struct ieee80211_rx_status rx_status = { 0 };
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struct ieee80211_hdr *hdr;
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__le16 fc;
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u8 *rsr, *new_rsr, *rssi;
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__le64 *tsf_time;
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u16 frame_size;
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int ii, r;
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u8 *rx_sts, *rx_rate, *sq;
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u8 *skb_data;
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u8 rate_idx = 0;
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u8 rate[MAX_RATE] = {2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108};
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long rx_dbm;
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/* [31:16]RcvByteCount ( not include 4-byte Status ) */
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frame_size = le16_to_cpu(*((__le16 *)(skb->data + 2)));
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if (frame_size > 2346 || frame_size < 14) {
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dev_dbg(&priv->pcid->dev, "------- WRONG Length 1\n");
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return false;
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}
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skb_data = (u8 *)skb->data;
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rx_sts = skb_data;
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rx_rate = skb_data + 1;
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sband = hw->wiphy->bands[hw->conf.chandef.chan->band];
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for (r = RATE_1M; r < MAX_RATE; r++) {
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if (*rx_rate == rate[r])
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break;
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}
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priv->rx_rate = r;
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for (ii = 0; ii < sband->n_bitrates; ii++) {
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if (sband->bitrates[ii].hw_value == r) {
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rate_idx = ii;
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break;
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}
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}
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if (ii == sband->n_bitrates) {
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dev_dbg(&priv->pcid->dev, "Wrong RxRate %x\n", *rx_rate);
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return false;
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}
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tsf_time = (__le64 *)(skb_data + bytes_received - 12);
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sq = skb_data + bytes_received - 4;
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new_rsr = skb_data + bytes_received - 3;
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rssi = skb_data + bytes_received - 2;
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rsr = skb_data + bytes_received - 1;
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if (*rsr & (RSR_IVLDTYP | RSR_IVLDLEN))
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return false;
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RFvRSSITodBm(priv, *rssi, &rx_dbm);
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priv->byBBPreEDRSSI = (u8)rx_dbm + 1;
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priv->uCurrRSSI = *rssi;
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skb_pull(skb, 4);
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skb_trim(skb, frame_size);
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rx_status.mactime = le64_to_cpu(*tsf_time);
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rx_status.band = hw->conf.chandef.chan->band;
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rx_status.signal = rx_dbm;
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rx_status.flag = 0;
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rx_status.freq = hw->conf.chandef.chan->center_freq;
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if (!(*rsr & RSR_CRCOK))
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rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
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hdr = (struct ieee80211_hdr *)(skb->data);
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fc = hdr->frame_control;
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rx_status.rate_idx = rate_idx;
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if (ieee80211_has_protected(fc)) {
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if (priv->byLocalID > REV_ID_VT3253_A1)
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rx_status.flag |= RX_FLAG_DECRYPTED;
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/* Drop packet */
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if (!(*new_rsr & NEWRSR_DECRYPTOK))
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return false;
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}
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memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
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ieee80211_rx_irqsafe(priv->hw, skb);
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return true;
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}
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bool vnt_receive_frame(struct vnt_private *priv, struct vnt_rx_desc *curr_rd)
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{
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struct vnt_rd_info *rd_info = curr_rd->rd_info;
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struct sk_buff *skb;
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u16 frame_size;
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skb = rd_info->skb;
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dma_unmap_single(&priv->pcid->dev, rd_info->skb_dma,
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priv->rx_buf_sz, DMA_FROM_DEVICE);
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frame_size = le16_to_cpu(curr_rd->rd1.req_count)
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- le16_to_cpu(curr_rd->rd0.res_count);
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if ((frame_size > 2364) || (frame_size < 33)) {
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/* Frame Size error drop this packet.*/
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dev_dbg(&priv->pcid->dev, "Wrong frame size %d\n", frame_size);
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dev_kfree_skb_irq(skb);
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return true;
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}
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if (vnt_rx_data(priv, skb, frame_size))
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return true;
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dev_kfree_skb_irq(skb);
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return true;
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}
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