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/******************************************************************************
* 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);
}
}
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