Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / vt6655 / dpc.c

diff --git a/kernel/drivers/staging/vt6655/dpc.c b/kernel/drivers/staging/vt6655/dpc.c
new file mode 100644 (file)
index 0000000..b25ee96
--- /dev/null
+++ b/kernel/drivers/staging/vt6655/dpc.c
@@ -0,0 +1,162 @@
+/*
+ * 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, PSRxDesc curr_rd)
+{
+       PDEVICE_RD_INFO rd_info = curr_rd->pRDInfo;
+       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->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;
+}