staging: r8712u: Add the new driver to the mainline kernel

This code is for a completely new version of the Realtek 8192 USB devices
such as the D-Link DWA-130. The Realtek code, which was originally for
Linux, Windows XP and Windows CE, has been stripped of all code not needed
for Linux. In addition, only one additional configuration variable, which
enables AP mode, remains.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Florian Schilhabel <florian.c.schilhabel@googlemail.com>
Tested-by: Frederic Leroy <fredo@starox.org>

1 files changed, 169 insertions, 0 deletions

diff --git a/drivers/staging/rtl8712/recv_linux.c b/drivers/staging/rtl8712/recv_linux.c
new file mode 100644
index 000000000000..1f0949ed7ee0
--- /dev/null
+++ b/drivers/staging/rtl8712/recv_linux.c
@@ -0,0 +1,169 @@
+/******************************************************************************
+ * recv_linux.c
+ *
+ * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
+ * Linux device driver for RTL8192SU
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * 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, USA
+ *
+ * Modifications for inclusion into the Linux staging tree are
+ * Copyright(c) 2010 Larry Finger. All rights reserved.
+ *
+ * Contact information:
+ * WLAN FAE <wlanfae@realtek.com>.
+ * Larry Finger <Larry.Finger@lwfinger.net>
+ *
+ ******************************************************************************/
+
+#define _RECV_OSDEP_C_
+
+#include "osdep_service.h"
+#include "drv_types.h"
+#include "wifi.h"
+#include "recv_osdep.h"
+#include "osdep_intf.h"
+#include "usb_ops.h"
+
+/*init os related resource in struct recv_priv*/
+/*alloc os related resource in union recv_frame*/
+int r8712_os_recv_resource_alloc(struct _adapter *padapter,
+				 union recv_frame *precvframe)
+{
+	precvframe->u.hdr.pkt_newalloc = precvframe->u.hdr.pkt = NULL;
+	return _SUCCESS;
+}
+
+/*alloc os related resource in struct recv_buf*/
+int r8712_os_recvbuf_resource_alloc(struct _adapter *padapter,
+				    struct recv_buf *precvbuf)
+{
+	int res = _SUCCESS;
+
+	precvbuf->irp_pending = false;
+	precvbuf->purb = _usb_alloc_urb(0, GFP_KERNEL);
+	if (precvbuf->purb == NULL)
+		res = _FAIL;
+	precvbuf->pskb = NULL;
+	precvbuf->reuse = false;
+	precvbuf->pallocated_buf = NULL;
+	precvbuf->pbuf = NULL;
+	precvbuf->pdata = NULL;
+	precvbuf->phead = NULL;
+	precvbuf->ptail = NULL;
+	precvbuf->pend = NULL;
+	precvbuf->transfer_len = 0;
+	precvbuf->len = 0;
+	return res;
+}
+
+/*free os related resource in struct recv_buf*/
+int r8712_os_recvbuf_resource_free(struct _adapter *padapter,
+			     struct recv_buf *precvbuf)
+{
+	if (precvbuf->pskb)
+		dev_kfree_skb_any(precvbuf->pskb);
+	if (precvbuf->purb) {
+		usb_kill_urb(precvbuf->purb);
+		usb_free_urb(precvbuf->purb);
+	}
+	return _SUCCESS;
+}
+
+void r8712_handle_tkip_mic_err(struct _adapter *padapter, u8 bgroup)
+{
+	union iwreq_data wrqu;
+	struct iw_michaelmicfailure ev;
+	struct mlme_priv *pmlmepriv  = &padapter->mlmepriv;
+
+	memset(&ev, 0x00, sizeof(ev));
+	if (bgroup)
+		ev.flags |= IW_MICFAILURE_GROUP;
+	else
+		ev.flags |= IW_MICFAILURE_PAIRWISE;
+	ev.src_addr.sa_family = ARPHRD_ETHER;
+	memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
+	memset(&wrqu, 0x00, sizeof(wrqu));
+	wrqu.data.length = sizeof(ev);
+	wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE, &wrqu,
+			    (char *)&ev);
+}
+
+void r8712_recv_indicatepkt(struct _adapter *padapter,
+			    union recv_frame *precv_frame)
+{
+	struct recv_priv *precvpriv;
+	struct  __queue	*pfree_recv_queue;
+	_pkt *skb;
+	struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
+
+	precvpriv = &(padapter->recvpriv);
+	pfree_recv_queue = &(precvpriv->free_recv_queue);
+	skb = precv_frame->u.hdr.pkt;
+	if (skb == NULL)
+		goto _recv_indicatepkt_drop;
+	skb->data = precv_frame->u.hdr.rx_data;
+#ifdef NET_SKBUFF_DATA_USES_OFFSET
+	skb->tail = (sk_buff_data_t)(precv_frame->u.hdr.rx_tail -
+		     precv_frame->u.hdr.rx_head);
+#else
+	skb->tail = (sk_buff_data_t)precv_frame->u.hdr.rx_tail;
+#endif
+	skb->len = precv_frame->u.hdr.len;
+	if ((pattrib->tcpchk_valid == 1) && (pattrib->tcp_chkrpt == 1))
+		skb->ip_summed = CHECKSUM_UNNECESSARY;
+	else
+		skb->ip_summed = CHECKSUM_NONE;
+	skb->dev = padapter->pnetdev;
+	skb->protocol = eth_type_trans(skb, padapter->pnetdev);
+	netif_rx(skb);
+	precv_frame->u.hdr.pkt = NULL; /* pointers to NULL before
+					* r8712_free_recvframe() */
+	r8712_free_recvframe(precv_frame, pfree_recv_queue);
+	return;
+_recv_indicatepkt_drop:
+	 /*enqueue back to free_recv_queue*/
+	 if (precv_frame)
+		r8712_free_recvframe(precv_frame, pfree_recv_queue);
+	 precvpriv->rx_drop++;
+}
+
+void r8712_os_read_port(struct _adapter *padapter, struct recv_buf *precvbuf)
+{
+	struct recv_priv *precvpriv = &padapter->recvpriv;
+
+	precvbuf->ref_cnt--;
+	/*free skb in recv_buf*/
+	dev_kfree_skb_any(precvbuf->pskb);
+	precvbuf->pskb = NULL;
+	precvbuf->reuse = false;
+	if (precvbuf->irp_pending == false)
+		r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
+			 (unsigned char *)precvbuf);
+}
+
+static void _r8712_reordering_ctrl_timeout_handler (void *FunctionContext)
+{
+	struct recv_reorder_ctrl *preorder_ctrl =
+			 (struct recv_reorder_ctrl *)FunctionContext;
+
+	r8712_reordering_ctrl_timeout_handler(preorder_ctrl);
+}
+
+void r8712_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
+{
+	struct _adapter *padapter = preorder_ctrl->padapter;
+
+	_init_timer(&(preorder_ctrl->reordering_ctrl_timer), padapter->pnetdev,
+		    _r8712_reordering_ctrl_timeout_handler, preorder_ctrl);
+}