staging: vt6655: mac80211 conversion: add new rx functions

vnt_receive_frame which replaces device_receive_frame

and vnt_rx_data which handles mac80211 rx data

structures ieee80211_hw, ieee80211_vif and variable rx_rate are added
in structure vnt_private

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 123 insertions, 0 deletions

diff --git a/drivers/staging/vt6655/dpc.c b/drivers/staging/vt6655/dpc.c
index 67cadea..036bbb0 100644
--- a/drivers/staging/vt6655/dpc.c
+++ b/drivers/staging/vt6655/dpc.c
@@ -1321,3 +1321,126 @@ static bool s_bAPModeRxData(
 
 	return true;
 }
+
+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;
+
+	RFvRSSITodBm(priv, *rssi, &rx_dbm);
+
+	priv->byBBPreEDRSSI = (u8)rx_dbm + 1;
+	priv->uCurrRSSI = priv->byBBPreEDRSSI;
+
+	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;
+
+	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;
+	}
+
+	if (priv->vif && priv->bDiversityEnable) {
+		if (ieee80211_is_data(fc) &&
+		    (frame_size > 50) && priv->vif->bss_conf.assoc)
+			BBvAntennaDiversity(priv, priv->rx_rate, 0);
+	}
+
+	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, PSRxDesc curr_rd)
+{
+	PDEVICE_RD_INFO rd_info = curr_rd->pRDInfo;
+	struct sk_buff *skb;
+	u16 frame_size;
+
+	skb = rd_info->skb;
+
+	pci_unmap_single(priv->pcid, rd_info->skb_dma,
+			 priv->rx_buf_sz, PCI_DMA_FROMDEVICE);
+
+	frame_size = le16_to_cpu(curr_rd->m_rd1RD1.wReqCount)
+			- cpu_to_le16(curr_rd->m_rd0RD0.wResCount);
+
+	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;
+}