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, 182 insertions, 0 deletions

diff --git a/drivers/staging/rtl8712/xmit_linux.c b/drivers/staging/rtl8712/xmit_linux.c
new file mode 100644
index 000000000000..7dea8b5b7e75
--- /dev/null
+++ b/drivers/staging/rtl8712/xmit_linux.c
@@ -0,0 +1,182 @@
+/******************************************************************************
+ * xmit_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 _XMIT_OSDEP_C_
+
+#include "osdep_service.h"
+#include "drv_types.h"
+
+
+#include "if_ether.h"
+#include "ip.h"
+#include "rtl871x_byteorder.h"
+#include "wifi.h"
+#include "mlme_osdep.h"
+#include "xmit_osdep.h"
+#include "osdep_intf.h"
+
+static uint remainder_len(struct pkt_file *pfile)
+{
+	/* Kovich: Need to extend the buf_len to 64 bit ?(unsigned long long) */
+	return (uint)(pfile->buf_len - ((addr_t)(pfile->cur_addr) -
+	       (addr_t)(pfile->buf_start)));
+}
+
+void _r8712_open_pktfile(_pkt *pktptr, struct pkt_file *pfile)
+{
+	pfile->pkt = pktptr;
+	pfile->cur_addr = pfile->buf_start = pktptr->data;
+	pfile->pkt_len = pfile->buf_len = pktptr->len;
+	pfile->cur_buffer = pfile->buf_start ;
+}
+
+uint _r8712_pktfile_read(struct pkt_file *pfile, u8 *rmem, uint rlen)
+{
+	uint len;
+
+	len = remainder_len(pfile);
+	len = (rlen > len) ? len : rlen;
+	if (rmem)
+		skb_copy_bits(pfile->pkt, pfile->buf_len - pfile->pkt_len,
+			      rmem, len);
+	pfile->cur_addr += len;
+	pfile->pkt_len -= len;
+	return len;
+}
+
+sint r8712_endofpktfile(struct pkt_file *pfile)
+{
+	if (pfile->pkt_len == 0)
+		return true;
+	else
+		return false;
+}
+
+
+void r8712_set_qos(struct pkt_file *ppktfile, struct pkt_attrib *pattrib)
+{
+	int i;
+	struct ethhdr etherhdr;
+	struct iphdr ip_hdr;
+	u16 UserPriority = 0;
+
+	_r8712_open_pktfile(ppktfile->pkt, ppktfile);
+	_r8712_pktfile_read(ppktfile, (unsigned char *)&etherhdr, ETH_HLEN);
+
+	/* get UserPriority from IP hdr*/
+	if (pattrib->ether_type == 0x0800) {
+		i = _r8712_pktfile_read(ppktfile, (u8 *)&ip_hdr,
+					sizeof(ip_hdr));
+		/*UserPriority = (ntohs(ip_hdr.tos) >> 5) & 0x3 ;*/
+		UserPriority = ip_hdr.tos >> 5;
+	} else {
+		/* "When priority processing of data frames is supported,
+		 * a STA's SME should send EAPOL-Key frames at the highest
+		 * priority." */
+
+		if (pattrib->ether_type == 0x888e)
+			UserPriority = 7;
+	}
+	pattrib->priority = UserPriority;
+	pattrib->hdrlen = WLAN_HDR_A3_QOS_LEN;
+	pattrib->subtype = WIFI_QOS_DATA_TYPE;
+}
+
+int r8712_xmit_resource_alloc(struct _adapter *padapter,
+			      struct xmit_buf *pxmitbuf)
+{
+	int i;
+
+	for (i = 0; i < 8; i++) {
+		pxmitbuf->pxmit_urb[i] = _usb_alloc_urb(0, GFP_KERNEL);
+		if (pxmitbuf->pxmit_urb[i] == NULL) {
+			printk(KERN_ERR "r8712u: pxmitbuf->pxmit_urb[i]"
+			    " == NULL");
+			return _FAIL;
+		}
+	}
+	return _SUCCESS;
+}
+
+void r8712_xmit_resource_free(struct _adapter *padapter,
+			      struct xmit_buf *pxmitbuf)
+{
+	int i;
+
+	for (i = 0; i < 8; i++) {
+		if (pxmitbuf->pxmit_urb[i]) {
+			usb_kill_urb(pxmitbuf->pxmit_urb[i]);
+			usb_free_urb(pxmitbuf->pxmit_urb[i]);
+		}
+	}
+}
+
+void r8712_xmit_complete(struct _adapter *padapter, struct xmit_frame *pxframe)
+{
+	if (pxframe->pkt)
+		dev_kfree_skb_any(pxframe->pkt);
+	pxframe->pkt = NULL;
+}
+
+int r8712_xmit_entry(_pkt *pkt, struct  net_device *pnetdev)
+{
+	struct xmit_frame *pxmitframe = NULL;
+	struct _adapter *padapter = (struct _adapter *)_netdev_priv(pnetdev);
+	struct xmit_priv *pxmitpriv = &(padapter->xmitpriv);
+	int ret = 0;
+
+	if (r8712_if_up(padapter) == false) {
+		ret = 0;
+		goto _xmit_entry_drop;
+	}
+	pxmitframe = r8712_alloc_xmitframe(pxmitpriv);
+	if (pxmitframe == NULL) {
+		ret = 0;
+		goto _xmit_entry_drop;
+	}
+	if ((!r8712_update_attrib(padapter, pkt, &pxmitframe->attrib))) {
+		ret = 0;
+		goto _xmit_entry_drop;
+	}
+	padapter->ledpriv.LedControlHandler(padapter, LED_CTL_TX);
+	pxmitframe->pkt = pkt;
+	if (r8712_pre_xmit(padapter, pxmitframe) == true) {
+		/*dump xmitframe directly or drop xframe*/
+		dev_kfree_skb_any(pkt);
+		pxmitframe->pkt = NULL;
+	}
+	pxmitpriv->tx_pkts++;
+	pxmitpriv->tx_bytes += pxmitframe->attrib.last_txcmdsz;
+	return ret;
+_xmit_entry_drop:
+	if (pxmitframe)
+		r8712_free_xmitframe(pxmitpriv, pxmitframe);
+	pxmitpriv->tx_drop++;
+	dev_kfree_skb_any(pkt);
+	return ret;
+}