staging: vt6656: Move vnt_rx_data to usbpipe.c

vnt_rx_data is a USB function and vnt_submit_rx_urb_complete is
the only caller therefore removing dpc.c/h files and becoming
static.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Link: https://lore.kernel.org/r/d3937276-5a47-7184-e263-84d9c9cb5c7a@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 101 insertions, 1 deletions

diff --git a/drivers/staging/vt6656/usbpipe.c b/drivers/staging/vt6656/usbpipe.c
index c905f3eaf655..b9e79755e7fa 100644
--- a/drivers/staging/vt6656/usbpipe.c
+++ b/drivers/staging/vt6656/usbpipe.c
@@ -25,11 +25,11 @@
  */
 
 #include "rxtx.h"
-#include "dpc.h"
 #include "desc.h"
 #include "device.h"
 #include "usbpipe.h"
 #include "mac.h"
+#include "rf.h"
 
 #define USB_CTL_WAIT	500 /* ms */
 
@@ -294,6 +294,106 @@ err:
 	return ret;
 }
 
+static 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;
+	struct vnt_rx_header *head;
+	struct vnt_rx_tail *tail;
+	u32 frame_size;
+	int ii;
+	u16 rx_bitrate, pay_load_with_padding;
+	u8 rate_idx = 0;
+	long rx_dbm;
+
+	skb = ptr_rcb->skb;
+	rx_status = IEEE80211_SKB_RXCB(skb);
+
+	/* [31:16]RcvByteCount ( not include 4-byte Status ) */
+	head = (struct vnt_rx_header *)skb->data;
+	frame_size = head->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;
+	}
+
+	/* 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 */
+
+	/*Fix hardware bug => PLCP_Length error */
+	if (((bytes_received - head->pay_load_len) > 27) ||
+	    ((bytes_received - head->pay_load_len) < 24) ||
+	    (bytes_received < head->pay_load_len)) {
+		dev_dbg(&priv->usb->dev, "Wrong PLCP Length %x\n",
+			head->pay_load_len);
+		return false;
+	}
+
+	sband = hw->wiphy->bands[hw->conf.chandef.chan->band];
+	rx_bitrate = head->rx_rate * 5; /* rx_rate * 5 */
+
+	for (ii = 0; ii < sband->n_bitrates; ii++) {
+		if (sband->bitrates[ii].bitrate == rx_bitrate) {
+			rate_idx = ii;
+				break;
+		}
+	}
+
+	if (ii == sband->n_bitrates) {
+		dev_dbg(&priv->usb->dev, "Wrong Rx Bit Rate %d\n", rx_bitrate);
+		return false;
+	}
+
+	pay_load_with_padding = ((head->pay_load_len / 4) +
+		((head->pay_load_len % 4) ? 1 : 0)) * 4;
+
+	tail = (struct vnt_rx_tail *)(skb->data +
+				      sizeof(*head) + pay_load_with_padding);
+	priv->tsf_time = le64_to_cpu(tail->tsf_time);
+
+	if (tail->rsr & (RSR_IVLDTYP | RSR_IVLDLEN))
+		return false;
+
+	vnt_rf_rssi_to_dbm(priv, tail->rssi, &rx_dbm);
+
+	priv->bb_pre_ed_rssi = (u8)-rx_dbm + 1;
+	priv->current_rssi = priv->bb_pre_ed_rssi;
+
+	skb_pull(skb, sizeof(*head));
+	skb_trim(skb, head->pay_load_len);
+
+	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;
+
+	if (!(tail->rsr & RSR_CRCOK))
+		rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
+
+	rx_status->rate_idx = rate_idx;
+
+	if (tail->new_rsr & NEWRSR_DECRYPTOK)
+		rx_status->flag |= RX_FLAG_DECRYPTED;
+
+	ieee80211_rx_irqsafe(priv->hw, skb);
+
+	return true;
+}
+
 static void vnt_submit_rx_urb_complete(struct urb *urb)
 {
 	struct vnt_rcb *rcb = urb->context;