// SPDX-License-Identifier: GPL-2.0+
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/*
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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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* 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_rate;
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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_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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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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