From 63b9907f58f1c1b718cd37eeaec074692f00492d Mon Sep 17 00:00:00 2001 From: Malcolm Priestley Date: Wed, 25 Jun 2014 21:14:22 +0100 Subject: staging: vt6656: mac80211 conversion: create rx function. Add mac80211 header and depends. Create new function vnt_rx_data to receive 80211 packets which is based on RXbBulkInProcessData and rx them into mac80211 The function also relays dbm, tsf_time(as mactime) and sets byBBPreEDRSSI and uCurrRSSI. skb is modified slightly to skb_put the maxium tail room in PIPEnsBulkInUsbRead and trim back in vnt_rx_data. dev_alloc_skb is used to reallocate the sk_buff. Signed-off-by: Malcolm Priestley Signed-off-by: Greg Kroah-Hartman --- drivers/staging/vt6656/dpc.c | 137 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 136 insertions(+), 1 deletion(-) (limited to 'drivers/staging/vt6656/dpc.c') diff --git a/drivers/staging/vt6656/dpc.c b/drivers/staging/vt6656/dpc.c index c0ec5b37aa7c..0b9c92382076 100644 --- a/drivers/staging/vt6656/dpc.c +++ b/drivers/staging/vt6656/dpc.c @@ -900,7 +900,7 @@ void RXvFreeRCB(struct vnt_rcb *rcb, int re_alloc_skb) } if (re_alloc_skb == true) { - rcb->skb = netdev_alloc_skb(priv->dev, priv->rx_buf_sz); + rcb->skb = dev_alloc_skb(priv->rx_buf_sz); /* TODO error handling */ if (!rcb->skb) { DBG_PRT(MSG_LEVEL_ERR, KERN_ERR @@ -969,3 +969,138 @@ void RXvMngWorkItem(struct work_struct *work) pDevice->bIsRxMngWorkItemQueued = false; } +int vnt_rx_data(struct vnt_private *priv, struct vnt_rcb *ptr_rcb, + unsigned long bytes_received) +{ + struct ieee80211_hw *hw = priv->hw; + struct ieee80211_supported_band *sband; + struct sk_buff *skb; + struct ieee80211_rx_status rx_status = { 0 }; + struct ieee80211_hdr *hdr; + __le16 fc; + u8 *rsr, *new_rsr, *rssi, *frame; + __le64 *tsf_time; + u32 frame_size; + int ii, r; + u8 *rx_sts, *rx_rate, *sq, *sq_3; + u32 wbk_status; + u8 *skb_data; + u16 *pay_load_len; + u16 pay_load_with_padding; + u8 rate_idx = 0; + u8 rate[MAX_RATE] = {2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108}; + long rx_dbm; + + skb = ptr_rcb->skb; + + /* [31:16]RcvByteCount ( not include 4-byte Status ) */ + wbk_status = *((u32 *)(skb->data)); + frame_size = wbk_status >> 16; + frame_size += 4; + + if (bytes_received != frame_size) { + dev_dbg(&priv->usb->dev, "------- WRONG Length 1\n"); + return false; + } + + if ((bytes_received > 2372) || (bytes_received <= 40)) { + /* Frame Size error drop this packet.*/ + dev_dbg(&priv->usb->dev, "------ WRONG Length 2\n"); + return false; + } + + skb_data = (u8 *)skb->data; + + rx_sts = skb_data+4; + rx_rate = skb_data+5; + + /* real Frame Size = USBframe_size -4WbkStatus - 4RxStatus */ + /* -8TSF - 4RSR - 4SQ3 - ?Padding */ + + /* if SQ3 the range is 24~27, if no SQ3 the range is 20~23 */ + + pay_load_len = (u16 *) (skb_data + 6); + + /*Fix hardware bug => PLCP_Length error */ + if (((bytes_received - (*pay_load_len)) > 27) || + ((bytes_received - (*pay_load_len)) < 24) || + (bytes_received < (*pay_load_len))) { + dev_dbg(&priv->usb->dev, "Wrong PLCP Length %x\n", + *pay_load_len); + return false; + } + + 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->usb->dev, "Wrong RxRate %x\n", *rx_rate); + return false; + } + + pay_load_with_padding = ((*pay_load_len / 4) + + ((*pay_load_len % 4) ? 1 : 0)) * 4; + + tsf_time = (__le64 *)(skb_data + 8 + pay_load_with_padding); + + priv->tsf_time = le64_to_cpu(*tsf_time); + + if (priv->byBBType == BB_TYPE_11G) { + sq_3 = skb_data + 8 + pay_load_with_padding + 12; + sq = sq_3; + } else { + sq = skb_data + 8 + pay_load_with_padding + 8; + sq_3 = sq; + } + + new_rsr = skb_data + 8 + pay_load_with_padding + 9; + rssi = skb_data + 8 + pay_load_with_padding + 10; + rsr = skb_data + 8 + pay_load_with_padding + 11; + + frame_size = *pay_load_len; + + vnt_rf_rssi_to_dbm(priv, *rssi, &rx_dbm); + + priv->byBBPreEDRSSI = (u8)rx_dbm + 1; + priv->uCurrRSSI = priv->byBBPreEDRSSI; + + frame = skb_data + 8; + + skb_pull(skb, 8); + skb_trim(skb, frame_size); + + rx_status.mactime = priv->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; + } + + memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); + + ieee80211_rx_irqsafe(priv->hw, skb); + + return true; +} -- cgit v1.2.1