1 /****************************************************************************** 2 * rtl871x_io.c 3 * 4 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. 5 * Linux device driver for RTL8192SU 6 * 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. 10 * 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. 15 * 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 19 * 20 * Modifications for inclusion into the Linux staging tree are 21 * Copyright(c) 2010 Larry Finger. All rights reserved. 22 * 23 * Contact information: 24 * WLAN FAE <wlanfae@realtek.com> 25 * Larry Finger <Larry.Finger@lwfinger.net> 26 * 27 ******************************************************************************/ 28 /* 29 * 30 * The purpose of rtl871x_io.c 31 * 32 * a. provides the API 33 * b. provides the protocol engine 34 * c. provides the software interface between caller and the hardware interface 35 * 36 * For r8712u, both sync/async operations are provided. 37 * 38 * Only sync read/write_mem operations are provided. 39 * 40 */ 41 42 #define _RTL871X_IO_C_ 43 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" 49 50 static uint _init_intf_hdl(struct _adapter *padapter, 51 struct intf_hdl *pintf_hdl) 52 { 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); 58 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 = kmalloc(sizeof(struct intf_priv), 64 GFP_ATOMIC); 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; 78 } 79 80 static void _unload_intf_hdl(struct intf_priv *pintfpriv) 81 { 82 void (*unload_intf_priv)(struct intf_priv *pintfpriv); 83 84 unload_intf_priv = &r8712_usb_unload_intf_priv; 85 unload_intf_priv(pintfpriv); 86 kfree(pintfpriv); 87 } 88 89 static uint register_intf_hdl(u8 *dev, struct intf_hdl *pintfhdl) 90 { 91 struct _adapter *adapter = (struct _adapter *)dev; 92 93 pintfhdl->intf_option = 0; 94 pintfhdl->adapter = dev; 95 pintfhdl->intf_dev = (u8 *)&(adapter->dvobjpriv); 96 if (!_init_intf_hdl(adapter, pintfhdl)) 97 goto register_intf_hdl_fail; 98 return _SUCCESS; 99 register_intf_hdl_fail: 100 return false; 101 } 102 103 static void unregister_intf_hdl(struct intf_hdl *pintfhdl) 104 { 105 _unload_intf_hdl(pintfhdl->pintfpriv); 106 memset((u8 *)pintfhdl, 0, sizeof(struct intf_hdl)); 107 } 108 109 uint r8712_alloc_io_queue(struct _adapter *adapter) 110 { 111 u32 i; 112 struct io_queue *pio_queue; 113 struct io_req *pio_req; 114 115 pio_queue = kmalloc(sizeof(*pio_queue), GFP_ATOMIC); 116 if (pio_queue == NULL) 117 goto alloc_io_queue_fail; 118 INIT_LIST_HEAD(&pio_queue->free_ioreqs); 119 INIT_LIST_HEAD(&pio_queue->processing); 120 INIT_LIST_HEAD(&pio_queue->pending); 121 spin_lock_init(&pio_queue->lock); 122 pio_queue->pallocated_free_ioreqs_buf = kmalloc(NUM_IOREQ * 123 (sizeof(struct io_req)) + 4, 124 GFP_ATOMIC); 125 if ((pio_queue->pallocated_free_ioreqs_buf) == NULL) 126 goto alloc_io_queue_fail; 127 memset(pio_queue->pallocated_free_ioreqs_buf, 0, 128 (NUM_IOREQ * (sizeof(struct io_req)) + 4)); 129 pio_queue->free_ioreqs_buf = pio_queue->pallocated_free_ioreqs_buf + 4 130 - ((addr_t)(pio_queue->pallocated_free_ioreqs_buf) 131 & 3); 132 pio_req = (struct io_req *)(pio_queue->free_ioreqs_buf); 133 for (i = 0; i < NUM_IOREQ; i++) { 134 INIT_LIST_HEAD(&pio_req->list); 135 list_add_tail(&pio_req->list, &pio_queue->free_ioreqs); 136 pio_req++; 137 } 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(pio_queue); 146 } 147 adapter->pio_queue = NULL; 148 return _FAIL; 149 } 150 151 void r8712_free_io_queue(struct _adapter *adapter) 152 { 153 struct io_queue *pio_queue = adapter->pio_queue; 154 155 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(pio_queue); 160 } 161 } 162