Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / staging / rtl8712 / rtl871x_io.c
blobca84ee02eacc1cb7288ca268ac4cad8945c07c09
1 /******************************************************************************
2 * rtl871x_io.c
4 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
5 * Linux device driver for RTL8192SU
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 * Modifications for inclusion into the Linux staging tree are
21 * Copyright(c) 2010 Larry Finger. All rights reserved.
23 * Contact information:
24 * WLAN FAE <wlanfae@realtek.com>
25 * Larry Finger <Larry.Finger@lwfinger.net>
27 ******************************************************************************/
30 * The purpose of rtl871x_io.c
32 * a. provides the API
33 * b. provides the protocol engine
34 * c. provides the software interface between caller and the hardware interface
36 * For r8712u, both sync/async operations are provided.
38 * Only sync read/write_mem operations are provided.
42 #define _RTL871X_IO_C_
44 #include "osdep_service.h"
45 #include "drv_types.h"
46 #include "rtl871x_io.h"
47 #include "osdep_intf.h"
48 #include "usb_ops.h"
50 static uint _init_intf_hdl(struct _adapter *padapter,
51 struct intf_hdl *pintf_hdl)
53 struct intf_priv *pintf_priv;
54 void (*set_intf_option)(u32 *poption) = NULL;
55 void (*set_intf_funs)(struct intf_hdl *pintf_hdl);
56 void (*set_intf_ops)(struct _io_ops *pops);
57 uint (*init_intf_priv)(struct intf_priv *pintfpriv);
59 set_intf_option = &(r8712_usb_set_intf_option);
60 set_intf_funs = &(r8712_usb_set_intf_funs);
61 set_intf_ops = &r8712_usb_set_intf_ops;
62 init_intf_priv = &r8712_usb_init_intf_priv;
63 pintf_priv = pintf_hdl->pintfpriv = (struct intf_priv *)
64 _malloc(sizeof(struct intf_priv));
65 if (pintf_priv == NULL)
66 goto _init_intf_hdl_fail;
67 pintf_hdl->adapter = (u8 *)padapter;
68 set_intf_option(&pintf_hdl->intf_option);
69 set_intf_funs(pintf_hdl);
70 set_intf_ops(&pintf_hdl->io_ops);
71 pintf_priv->intf_dev = (u8 *)&(padapter->dvobjpriv);
72 if (init_intf_priv(pintf_priv) == _FAIL)
73 goto _init_intf_hdl_fail;
74 return _SUCCESS;
75 _init_intf_hdl_fail:
76 kfree(pintf_priv);
77 return _FAIL;
80 static void _unload_intf_hdl(struct intf_priv *pintfpriv)
82 void (*unload_intf_priv)(struct intf_priv *pintfpriv);
84 unload_intf_priv = &r8712_usb_unload_intf_priv;
85 unload_intf_priv(pintfpriv);
86 kfree(pintfpriv);
89 static uint register_intf_hdl(u8 *dev, struct intf_hdl *pintfhdl)
91 struct _adapter *adapter = (struct _adapter *)dev;
93 pintfhdl->intf_option = 0;
94 pintfhdl->adapter = dev;
95 pintfhdl->intf_dev = (u8 *)&(adapter->dvobjpriv);
96 if (_init_intf_hdl(adapter, pintfhdl) == false)
97 goto register_intf_hdl_fail;
98 return _SUCCESS;
99 register_intf_hdl_fail:
100 return false;
103 static void unregister_intf_hdl(struct intf_hdl *pintfhdl)
105 _unload_intf_hdl(pintfhdl->pintfpriv);
106 memset((u8 *)pintfhdl, 0, sizeof(struct intf_hdl));
109 uint r8712_alloc_io_queue(struct _adapter *adapter)
111 u32 i;
112 struct io_queue *pio_queue;
113 struct io_req *pio_req;
115 pio_queue = (struct io_queue *)_malloc(sizeof(struct io_queue));
116 if (pio_queue == NULL)
117 goto alloc_io_queue_fail;
118 _init_listhead(&pio_queue->free_ioreqs);
119 _init_listhead(&pio_queue->processing);
120 _init_listhead(&pio_queue->pending);
121 spin_lock_init(&pio_queue->lock);
122 pio_queue->pallocated_free_ioreqs_buf = (u8 *)_malloc(NUM_IOREQ *
123 (sizeof(struct io_req)) + 4);
124 if ((pio_queue->pallocated_free_ioreqs_buf) == NULL)
125 goto alloc_io_queue_fail;
126 memset(pio_queue->pallocated_free_ioreqs_buf, 0,
127 (NUM_IOREQ * (sizeof(struct io_req)) + 4));
128 pio_queue->free_ioreqs_buf = pio_queue->pallocated_free_ioreqs_buf + 4
129 - ((addr_t)(pio_queue->pallocated_free_ioreqs_buf)
130 & 3);
131 pio_req = (struct io_req *)(pio_queue->free_ioreqs_buf);
132 for (i = 0; i < NUM_IOREQ; i++) {
133 _init_listhead(&pio_req->list);
134 sema_init(&pio_req->sema, 0);
135 list_insert_tail(&pio_req->list, &pio_queue->free_ioreqs);
136 pio_req++;
138 if ((register_intf_hdl((u8 *)adapter, &(pio_queue->intf))) == _FAIL)
139 goto alloc_io_queue_fail;
140 adapter->pio_queue = pio_queue;
141 return _SUCCESS;
142 alloc_io_queue_fail:
143 if (pio_queue) {
144 kfree(pio_queue->pallocated_free_ioreqs_buf);
145 kfree((u8 *)pio_queue);
147 adapter->pio_queue = NULL;
148 return _FAIL;
151 void r8712_free_io_queue(struct _adapter *adapter)
153 struct io_queue *pio_queue = (struct io_queue *)(adapter->pio_queue);
155 if (pio_queue) {
156 kfree(pio_queue->pallocated_free_ioreqs_buf);
157 adapter->pio_queue = NULL;
158 unregister_intf_hdl(&pio_queue->intf);
159 kfree((u8 *)pio_queue);