1 /*
2 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
3 * All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 *
20 * File: usbpipe.c
21 *
22 * Purpose: Handle USB control endpoint
23 *
24 * Author: Warren Hsu
25 *
26 * Date: Mar. 29, 2005
27 *
28 * Functions:
29 * vnt_control_out - Write variable length bytes to MEM/BB/MAC/EEPROM
30 * vnt_control_in - Read variable length bytes from MEM/BB/MAC/EEPROM
31 * vnt_control_out_u8 - Write one byte to MEM/BB/MAC/EEPROM
32 * vnt_control_in_u8 - Read one byte from MEM/BB/MAC/EEPROM
33 *
34 * Revision History:
35 * 04-05-2004 Jerry Chen: Initial release
36 * 11-24-2004 Warren Hsu: Add ControlvWriteByte,ControlvReadByte,ControlvMaskByte
37 *
38 */
39
40 #include "int.h"
41 #include "rxtx.h"
42 #include "dpc.h"
43 #include "desc.h"
44 #include "device.h"
45 #include "usbpipe.h"
46
47 #define USB_CTL_WAIT 500 /* ms */
48
vnt_control_out(struct vnt_private * priv,u8 request,u16 value,u16 index,u16 length,u8 * buffer)49 int vnt_control_out(struct vnt_private *priv, u8 request, u16 value,
50 u16 index, u16 length, u8 *buffer)
51 {
52 int status = 0;
53
54 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
55 return STATUS_FAILURE;
56
57 mutex_lock(&priv->usb_lock);
58
59 status = usb_control_msg(priv->usb,
60 usb_sndctrlpipe(priv->usb, 0), request, 0x40, value,
61 index, buffer, length, USB_CTL_WAIT);
62
63 mutex_unlock(&priv->usb_lock);
64
65 if (status < (int)length)
66 return STATUS_FAILURE;
67
68 return STATUS_SUCCESS;
69 }
70
vnt_control_out_u8(struct vnt_private * priv,u8 reg,u8 reg_off,u8 data)71 void vnt_control_out_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 data)
72 {
73 vnt_control_out(priv, MESSAGE_TYPE_WRITE,
74 reg_off, reg, sizeof(u8), &data);
75 }
76
vnt_control_in(struct vnt_private * priv,u8 request,u16 value,u16 index,u16 length,u8 * buffer)77 int vnt_control_in(struct vnt_private *priv, u8 request, u16 value,
78 u16 index, u16 length, u8 *buffer)
79 {
80 int status;
81
82 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
83 return STATUS_FAILURE;
84
85 mutex_lock(&priv->usb_lock);
86
87 status = usb_control_msg(priv->usb,
88 usb_rcvctrlpipe(priv->usb, 0), request, 0xc0, value,
89 index, buffer, length, USB_CTL_WAIT);
90
91 mutex_unlock(&priv->usb_lock);
92
93 if (status < (int)length)
94 return STATUS_FAILURE;
95
96 return STATUS_SUCCESS;
97 }
98
vnt_control_in_u8(struct vnt_private * priv,u8 reg,u8 reg_off,u8 * data)99 void vnt_control_in_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 *data)
100 {
101 vnt_control_in(priv, MESSAGE_TYPE_READ,
102 reg_off, reg, sizeof(u8), data);
103 }
104
vnt_start_interrupt_urb_complete(struct urb * urb)105 static void vnt_start_interrupt_urb_complete(struct urb *urb)
106 {
107 struct vnt_private *priv = urb->context;
108 int status;
109
110 switch (urb->status) {
111 case 0:
112 case -ETIMEDOUT:
113 break;
114 case -ECONNRESET:
115 case -ENOENT:
116 case -ESHUTDOWN:
117 priv->int_buf.in_use = false;
118 return;
119 default:
120 break;
121 }
122
123 status = urb->status;
124
125 if (status != STATUS_SUCCESS) {
126 priv->int_buf.in_use = false;
127
128 dev_dbg(&priv->usb->dev, "%s status = %d\n", __func__, status);
129 } else {
130 vnt_int_process_data(priv);
131 }
132
133 status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
134 if (status)
135 dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
136 else
137 priv->int_buf.in_use = true;
138 }
139
vnt_start_interrupt_urb(struct vnt_private * priv)140 int vnt_start_interrupt_urb(struct vnt_private *priv)
141 {
142 int status = STATUS_FAILURE;
143
144 if (priv->int_buf.in_use)
145 return STATUS_FAILURE;
146
147 priv->int_buf.in_use = true;
148
149 usb_fill_int_urb(priv->interrupt_urb,
150 priv->usb,
151 usb_rcvintpipe(priv->usb, 1),
152 priv->int_buf.data_buf,
153 MAX_INTERRUPT_SIZE,
154 vnt_start_interrupt_urb_complete,
155 priv,
156 priv->int_interval);
157
158 status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
159 if (status) {
160 dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
161 priv->int_buf.in_use = false;
162 }
163
164 return status;
165 }
166
vnt_submit_rx_urb_complete(struct urb * urb)167 static void vnt_submit_rx_urb_complete(struct urb *urb)
168 {
169 struct vnt_rcb *rcb = urb->context;
170 struct vnt_private *priv = rcb->priv;
171
172 switch (urb->status) {
173 case 0:
174 break;
175 case -ECONNRESET:
176 case -ENOENT:
177 case -ESHUTDOWN:
178 return;
179 case -ETIMEDOUT:
180 default:
181 dev_dbg(&priv->usb->dev, "BULK In failed %d\n", urb->status);
182 break;
183 }
184
185 if (urb->actual_length) {
186 if (vnt_rx_data(priv, rcb, urb->actual_length)) {
187 rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
188 if (!rcb->skb) {
189 dev_dbg(&priv->usb->dev,
190 "Failed to re-alloc rx skb\n");
191
192 rcb->in_use = false;
193 return;
194 }
195 } else {
196 skb_push(rcb->skb, skb_headroom(rcb->skb));
197 skb_trim(rcb->skb, 0);
198 }
199
200 urb->transfer_buffer = skb_put(rcb->skb,
201 skb_tailroom(rcb->skb));
202 }
203
204 if (usb_submit_urb(urb, GFP_ATOMIC)) {
205 dev_dbg(&priv->usb->dev, "Failed to re submit rx skb\n");
206
207 rcb->in_use = false;
208 }
209 }
210
vnt_submit_rx_urb(struct vnt_private * priv,struct vnt_rcb * rcb)211 int vnt_submit_rx_urb(struct vnt_private *priv, struct vnt_rcb *rcb)
212 {
213 int status = 0;
214 struct urb *urb;
215
216 urb = rcb->urb;
217 if (rcb->skb == NULL) {
218 dev_dbg(&priv->usb->dev, "rcb->skb is null\n");
219 return status;
220 }
221
222 usb_fill_bulk_urb(urb,
223 priv->usb,
224 usb_rcvbulkpipe(priv->usb, 2),
225 skb_put(rcb->skb, skb_tailroom(rcb->skb)),
226 MAX_TOTAL_SIZE_WITH_ALL_HEADERS,
227 vnt_submit_rx_urb_complete,
228 rcb);
229
230 status = usb_submit_urb(urb, GFP_ATOMIC);
231 if (status != 0) {
232 dev_dbg(&priv->usb->dev, "Submit Rx URB failed %d\n", status);
233 return STATUS_FAILURE;
234 }
235
236 rcb->in_use = true;
237
238 return status;
239 }
240
vnt_tx_context_complete(struct urb * urb)241 static void vnt_tx_context_complete(struct urb *urb)
242 {
243 struct vnt_usb_send_context *context = urb->context;
244 struct vnt_private *priv = context->priv;
245
246 switch (urb->status) {
247 case 0:
248 dev_dbg(&priv->usb->dev, "Write %d bytes\n", context->buf_len);
249 break;
250 case -ECONNRESET:
251 case -ENOENT:
252 case -ESHUTDOWN:
253 context->in_use = false;
254 return;
255 case -ETIMEDOUT:
256 default:
257 dev_dbg(&priv->usb->dev, "BULK Out failed %d\n", urb->status);
258 break;
259 }
260
261 if (context->type == CONTEXT_DATA_PACKET)
262 ieee80211_wake_queues(priv->hw);
263
264 if (urb->status || context->type == CONTEXT_BEACON_PACKET) {
265 if (context->skb)
266 ieee80211_free_txskb(priv->hw, context->skb);
267
268 context->in_use = false;
269 }
270 }
271
vnt_tx_context(struct vnt_private * priv,struct vnt_usb_send_context * context)272 int vnt_tx_context(struct vnt_private *priv,
273 struct vnt_usb_send_context *context)
274 {
275 int status;
276 struct urb *urb;
277
278 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
279 context->in_use = false;
280 return STATUS_RESOURCES;
281 }
282
283 urb = context->urb;
284
285 usb_fill_bulk_urb(urb,
286 priv->usb,
287 usb_sndbulkpipe(priv->usb, 3),
288 context->data,
289 context->buf_len,
290 vnt_tx_context_complete,
291 context);
292
293 status = usb_submit_urb(urb, GFP_ATOMIC);
294 if (status != 0) {
295 dev_dbg(&priv->usb->dev, "Submit Tx URB failed %d\n", status);
296
297 context->in_use = false;
298 return STATUS_FAILURE;
299 }
300
301 return STATUS_PENDING;
302 }
303