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, 163 insertions, 0 deletions

diff --git a/drivers/staging/rtl8712/rtl871x_io.c b/drivers/staging/rtl8712/rtl871x_io.c
new file mode 100644
index 000000000000..e6e3c3752a97
--- /dev/null
+++ b/drivers/staging/rtl8712/rtl871x_io.c
@@ -0,0 +1,163 @@
+/******************************************************************************
+ * rtl871x_io.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>
+ *
+ ******************************************************************************/
+/*
+ *
+ * The purpose of rtl871x_io.c
+ *
+ * a. provides the API
+ * b. provides the protocol engine
+ * c. provides the software interface between caller and the hardware interface
+ *
+ * For r8712u, both sync/async operations are provided.
+ *
+ * Only sync read/write_mem operations are provided.
+ *
+ */
+
+#define _RTL871X_IO_C_
+
+#include "osdep_service.h"
+#include "drv_types.h"
+#include "rtl871x_io.h"
+#include "osdep_intf.h"
+#include "usb_ops.h"
+
+static uint _init_intf_hdl(struct _adapter *padapter,
+			   struct intf_hdl *pintf_hdl)
+{
+	struct	intf_priv	*pintf_priv;
+	void (*set_intf_option)(u32 *poption) = NULL;
+	void (*set_intf_funs)(struct intf_hdl *pintf_hdl);
+	void (*set_intf_ops)(struct _io_ops	*pops);
+	uint (*init_intf_priv)(struct intf_priv *pintfpriv);
+
+	set_intf_option = &(r8712_usb_set_intf_option);
+	set_intf_funs = &(r8712_usb_set_intf_funs);
+	set_intf_ops = &r8712_usb_set_intf_ops;
+	init_intf_priv = &r8712_usb_init_intf_priv;
+	pintf_priv = pintf_hdl->pintfpriv = (struct intf_priv *)
+		     _malloc(sizeof(struct intf_priv));
+	if (pintf_priv == NULL)
+		goto _init_intf_hdl_fail;
+	pintf_hdl->adapter = (u8 *)padapter;
+	set_intf_option(&pintf_hdl->intf_option);
+	set_intf_funs(pintf_hdl);
+	set_intf_ops(&pintf_hdl->io_ops);
+	pintf_priv->intf_dev = (u8 *)&(padapter->dvobjpriv);
+	if (init_intf_priv(pintf_priv) == _FAIL)
+		goto _init_intf_hdl_fail;
+	return _SUCCESS;
+_init_intf_hdl_fail:
+	if (pintf_priv)
+		kfree((u8 *)pintf_priv);
+	return _FAIL;
+}
+
+static void _unload_intf_hdl(struct intf_priv *pintfpriv)
+{
+	void (*unload_intf_priv)(struct intf_priv *pintfpriv);
+
+	unload_intf_priv = &r8712_usb_unload_intf_priv;
+	unload_intf_priv(pintfpriv);
+	if (pintfpriv)
+		kfree((u8 *)pintfpriv);
+}
+
+static uint register_intf_hdl(u8 *dev, struct intf_hdl *pintfhdl)
+{
+	struct _adapter *adapter = (struct _adapter *)dev;
+
+	pintfhdl->intf_option = 0;
+	pintfhdl->adapter = dev;
+	pintfhdl->intf_dev = (u8 *)&(adapter->dvobjpriv);
+	if (_init_intf_hdl(adapter, pintfhdl) == false)
+		goto register_intf_hdl_fail;
+	return _SUCCESS;
+register_intf_hdl_fail:
+	return false;
+}
+
+static  void unregister_intf_hdl(struct intf_hdl *pintfhdl)
+{
+	_unload_intf_hdl(pintfhdl->pintfpriv);
+	memset((u8 *)pintfhdl, 0, sizeof(struct intf_hdl));
+}
+
+uint r8712_alloc_io_queue(struct _adapter *adapter)
+{
+	u32 i;
+	struct io_queue *pio_queue;
+	struct io_req *pio_req;
+
+	pio_queue = (struct io_queue *)_malloc(sizeof(struct io_queue));
+	if (pio_queue == NULL)
+		goto alloc_io_queue_fail;
+	_init_listhead(&pio_queue->free_ioreqs);
+	_init_listhead(&pio_queue->processing);
+	_init_listhead(&pio_queue->pending);
+	spin_lock_init(&pio_queue->lock);
+	pio_queue->pallocated_free_ioreqs_buf = (u8 *)_malloc(NUM_IOREQ *
+						(sizeof(struct io_req)) + 4);
+	if ((pio_queue->pallocated_free_ioreqs_buf) == NULL)
+		goto alloc_io_queue_fail;
+	memset(pio_queue->pallocated_free_ioreqs_buf, 0,
+			(NUM_IOREQ * (sizeof(struct io_req)) + 4));
+	pio_queue->free_ioreqs_buf = pio_queue->pallocated_free_ioreqs_buf + 4
+			- ((addr_t)(pio_queue->pallocated_free_ioreqs_buf)
+			& 3);
+	pio_req = (struct io_req *)(pio_queue->free_ioreqs_buf);
+	for (i = 0; i < NUM_IOREQ; i++) {
+		_init_listhead(&pio_req->list);
+		sema_init(&pio_req->sema, 0);
+		list_insert_tail(&pio_req->list, &pio_queue->free_ioreqs);
+		pio_req++;
+	}
+	if ((register_intf_hdl((u8 *)adapter, &(pio_queue->intf))) == _FAIL)
+		goto alloc_io_queue_fail;
+	adapter->pio_queue = pio_queue;
+	return _SUCCESS;
+alloc_io_queue_fail:
+	if (pio_queue) {
+		kfree(pio_queue->pallocated_free_ioreqs_buf);
+		kfree((u8 *)pio_queue);
+	}
+	adapter->pio_queue = NULL;
+	return _FAIL;
+}
+
+void r8712_free_io_queue(struct _adapter *adapter)
+{
+	struct io_queue *pio_queue = (struct io_queue *)(adapter->pio_queue);
+
+	if (pio_queue) {
+		kfree(pio_queue->pallocated_free_ioreqs_buf);
+		adapter->pio_queue = NULL;
+		unregister_intf_hdl(&pio_queue->intf);
+		kfree((u8 *)pio_queue);
+	}
+}