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 u8 *usb_buffer;
54
55 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
56 return STATUS_FAILURE;
57
58 mutex_lock(&priv->usb_lock);
59
60 usb_buffer = kmemdup(buffer, length, GFP_KERNEL);
61 if (!usb_buffer) {
62 mutex_unlock(&priv->usb_lock);
63 return -ENOMEM;
64 }
65
66 status = usb_control_msg(priv->usb,
67 usb_sndctrlpipe(priv->usb, 0),
68 request, 0x40, value,
69 index, usb_buffer, length, USB_CTL_WAIT);
70
71 kfree(usb_buffer);
72
73 mutex_unlock(&priv->usb_lock);
74
75 if (status < (int)length)
76 return STATUS_FAILURE;
77
78 return STATUS_SUCCESS;
79 }
80
vnt_control_out_u8(struct vnt_private * priv,u8 reg,u8 reg_off,u8 data)81 void vnt_control_out_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 data)
82 {
83 vnt_control_out(priv, MESSAGE_TYPE_WRITE,
84 reg_off, reg, sizeof(u8), &data);
85 }
86
vnt_control_in(struct vnt_private * priv,u8 request,u16 value,u16 index,u16 length,u8 * buffer)87 int vnt_control_in(struct vnt_private *priv, u8 request, u16 value,
88 u16 index, u16 length, u8 *buffer)
89 {
90 int status;
91 u8 *usb_buffer;
92
93 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
94 return STATUS_FAILURE;
95
96 mutex_lock(&priv->usb_lock);
97
98 usb_buffer = kmalloc(length, GFP_KERNEL);
99 if (!usb_buffer) {
100 mutex_unlock(&priv->usb_lock);
101 return -ENOMEM;
102 }
103
104 status = usb_control_msg(priv->usb,
105 usb_rcvctrlpipe(priv->usb, 0),
106 request, 0xc0, value,
107 index, usb_buffer, length, USB_CTL_WAIT);
108
109 if (status == length)
110 memcpy(buffer, usb_buffer, length);
111
112 kfree(usb_buffer);
113
114 mutex_unlock(&priv->usb_lock);
115
116 if (status < (int)length)
117 return STATUS_FAILURE;
118
119 return STATUS_SUCCESS;
120 }
121
vnt_control_in_u8(struct vnt_private * priv,u8 reg,u8 reg_off,u8 * data)122 void vnt_control_in_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 *data)
123 {
124 vnt_control_in(priv, MESSAGE_TYPE_READ,
125 reg_off, reg, sizeof(u8), data);
126 }
127
vnt_start_interrupt_urb_complete(struct urb * urb)128 static void vnt_start_interrupt_urb_complete(struct urb *urb)
129 {
130 struct vnt_private *priv = urb->context;
131 int status;
132
133 switch (urb->status) {
134 case 0:
135 case -ETIMEDOUT:
136 break;
137 case -ECONNRESET:
138 case -ENOENT:
139 case -ESHUTDOWN:
140 priv->int_buf.in_use = false;
141 return;
142 default:
143 break;
144 }
145
146 status = urb->status;
147
148 if (status != STATUS_SUCCESS) {
149 priv->int_buf.in_use = false;
150
151 dev_dbg(&priv->usb->dev, "%s status = %d\n", __func__, status);
152 } else {
153 vnt_int_process_data(priv);
154 }
155
156 status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
157 if (status)
158 dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
159 else
160 priv->int_buf.in_use = true;
161 }
162
vnt_start_interrupt_urb(struct vnt_private * priv)163 int vnt_start_interrupt_urb(struct vnt_private *priv)
164 {
165 int status = STATUS_FAILURE;
166
167 if (priv->int_buf.in_use)
168 return STATUS_FAILURE;
169
170 priv->int_buf.in_use = true;
171
172 usb_fill_int_urb(priv->interrupt_urb,
173 priv->usb,
174 usb_rcvintpipe(priv->usb, 1),
175 priv->int_buf.data_buf,
176 MAX_INTERRUPT_SIZE,
177 vnt_start_interrupt_urb_complete,
178 priv,
179 priv->int_interval);
180
181 status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
182 if (status) {
183 dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
184 priv->int_buf.in_use = false;
185 }
186
187 return status;
188 }
189
vnt_submit_rx_urb_complete(struct urb * urb)190 static void vnt_submit_rx_urb_complete(struct urb *urb)
191 {
192 struct vnt_rcb *rcb = urb->context;
193 struct vnt_private *priv = rcb->priv;
194
195 switch (urb->status) {
196 case 0:
197 break;
198 case -ECONNRESET:
199 case -ENOENT:
200 case -ESHUTDOWN:
201 return;
202 case -ETIMEDOUT:
203 default:
204 dev_dbg(&priv->usb->dev, "BULK In failed %d\n", urb->status);
205 break;
206 }
207
208 if (urb->actual_length) {
209 if (vnt_rx_data(priv, rcb, urb->actual_length)) {
210 rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
211 if (!rcb->skb) {
212 dev_dbg(&priv->usb->dev,
213 "Failed to re-alloc rx skb\n");
214
215 rcb->in_use = false;
216 return;
217 }
218 } else {
219 skb_push(rcb->skb, skb_headroom(rcb->skb));
220 skb_trim(rcb->skb, 0);
221 }
222
223 urb->transfer_buffer = skb_put(rcb->skb,
224 skb_tailroom(rcb->skb));
225 }
226
227 if (usb_submit_urb(urb, GFP_ATOMIC)) {
228 dev_dbg(&priv->usb->dev, "Failed to re submit rx skb\n");
229
230 rcb->in_use = false;
231 }
232 }
233
vnt_submit_rx_urb(struct vnt_private * priv,struct vnt_rcb * rcb)234 int vnt_submit_rx_urb(struct vnt_private *priv, struct vnt_rcb *rcb)
235 {
236 int status = 0;
237 struct urb *urb;
238
239 urb = rcb->urb;
240 if (rcb->skb == NULL) {
241 dev_dbg(&priv->usb->dev, "rcb->skb is null\n");
242 return status;
243 }
244
245 usb_fill_bulk_urb(urb,
246 priv->usb,
247 usb_rcvbulkpipe(priv->usb, 2),
248 skb_put(rcb->skb, skb_tailroom(rcb->skb)),
249 MAX_TOTAL_SIZE_WITH_ALL_HEADERS,
250 vnt_submit_rx_urb_complete,
251 rcb);
252
253 status = usb_submit_urb(urb, GFP_ATOMIC);
254 if (status != 0) {
255 dev_dbg(&priv->usb->dev, "Submit Rx URB failed %d\n", status);
256 return STATUS_FAILURE;
257 }
258
259 rcb->in_use = true;
260
261 return status;
262 }
263
vnt_tx_context_complete(struct urb * urb)264 static void vnt_tx_context_complete(struct urb *urb)
265 {
266 struct vnt_usb_send_context *context = urb->context;
267 struct vnt_private *priv = context->priv;
268
269 switch (urb->status) {
270 case 0:
271 dev_dbg(&priv->usb->dev, "Write %d bytes\n", context->buf_len);
272 break;
273 case -ECONNRESET:
274 case -ENOENT:
275 case -ESHUTDOWN:
276 context->in_use = false;
277 return;
278 case -ETIMEDOUT:
279 default:
280 dev_dbg(&priv->usb->dev, "BULK Out failed %d\n", urb->status);
281 break;
282 }
283
284 if (context->type == CONTEXT_DATA_PACKET)
285 ieee80211_wake_queues(priv->hw);
286
287 if (urb->status || context->type == CONTEXT_BEACON_PACKET) {
288 if (context->skb)
289 ieee80211_free_txskb(priv->hw, context->skb);
290
291 context->in_use = false;
292 }
293 }
294
vnt_tx_context(struct vnt_private * priv,struct vnt_usb_send_context * context)295 int vnt_tx_context(struct vnt_private *priv,
296 struct vnt_usb_send_context *context)
297 {
298 int status;
299 struct urb *urb;
300
301 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
302 context->in_use = false;
303 return STATUS_RESOURCES;
304 }
305
306 urb = context->urb;
307
308 usb_fill_bulk_urb(urb,
309 priv->usb,
310 usb_sndbulkpipe(priv->usb, 3),
311 context->data,
312 context->buf_len,
313 vnt_tx_context_complete,
314 context);
315
316 status = usb_submit_urb(urb, GFP_ATOMIC);
317 if (status != 0) {
318 dev_dbg(&priv->usb->dev, "Submit Tx URB failed %d\n", status);
319
320 context->in_use = false;
321 return STATUS_FAILURE;
322 }
323
324 return STATUS_PENDING;
325 }
326