tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 *
16 * File: usbpipe.c
17 *
18 * Purpose: Handle USB control endpoint
19 *
20 * Author: Warren Hsu
21 *
22 * Date: Mar. 29, 2005
23 *
24 * Functions:
25 * vnt_control_out - Write variable length bytes to MEM/BB/MAC/EEPROM
26 * vnt_control_in - Read variable length bytes from MEM/BB/MAC/EEPROM
27 * vnt_control_out_u8 - Write one byte to MEM/BB/MAC/EEPROM
28 * vnt_control_in_u8 - Read one byte from MEM/BB/MAC/EEPROM
29 *
30 * Revision History:
31 * 04-05-2004 Jerry Chen: Initial release
32 * 11-24-2004 Warren Hsu: Add ControlvWriteByte,ControlvReadByte,
33 * ControlvMaskByte
34 *
35 */
36
37#include "int.h"
38#include "rxtx.h"
39#include "dpc.h"
40#include "desc.h"
41#include "device.h"
42#include "usbpipe.h"
43
44#define USB_CTL_WAIT 500 /* ms */
45
46int vnt_control_out(struct vnt_private *priv, u8 request, u16 value,
47 u16 index, u16 length, u8 *buffer)
48{
49 int status = 0;
50
51 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
52 return STATUS_FAILURE;
53
54 mutex_lock(&priv->usb_lock);
55
56 status = usb_control_msg(priv->usb,
57 usb_sndctrlpipe(priv->usb, 0), request, 0x40, value,
58 index, buffer, length, USB_CTL_WAIT);
59
60 mutex_unlock(&priv->usb_lock);
61
62 if (status < (int)length)
63 return STATUS_FAILURE;
64
65 return STATUS_SUCCESS;
66}
67
68void vnt_control_out_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 data)
69{
70 vnt_control_out(priv, MESSAGE_TYPE_WRITE,
71 reg_off, reg, sizeof(u8), &data);
72}
73
74int vnt_control_in(struct vnt_private *priv, u8 request, u16 value,
75 u16 index, u16 length, u8 *buffer)
76{
77 int status;
78
79 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
80 return STATUS_FAILURE;
81
82 mutex_lock(&priv->usb_lock);
83
84 status = usb_control_msg(priv->usb,
85 usb_rcvctrlpipe(priv->usb, 0), request, 0xc0, value,
86 index, buffer, length, USB_CTL_WAIT);
87
88 mutex_unlock(&priv->usb_lock);
89
90 if (status < (int)length)
91 return STATUS_FAILURE;
92
93 return STATUS_SUCCESS;
94}
95
96void vnt_control_in_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 *data)
97{
98 vnt_control_in(priv, MESSAGE_TYPE_READ,
99 reg_off, reg, sizeof(u8), data);
100}
101
102static void vnt_start_interrupt_urb_complete(struct urb *urb)
103{
104 struct vnt_private *priv = urb->context;
105 int status = urb->status;
106
107 switch (status) {
108 case 0:
109 case -ETIMEDOUT:
110 break;
111 case -ECONNRESET:
112 case -ENOENT:
113 case -ESHUTDOWN:
114 priv->int_buf.in_use = false;
115 return;
116 default:
117 break;
118 }
119
120 if (status) {
121 priv->int_buf.in_use = false;
122
123 dev_dbg(&priv->usb->dev, "%s status = %d\n", __func__, status);
124 } else {
125 vnt_int_process_data(priv);
126 }
127
128 status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
129 if (status)
130 dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
131 else
132 priv->int_buf.in_use = true;
133}
134
135int vnt_start_interrupt_urb(struct vnt_private *priv)
136{
137 int status = STATUS_FAILURE;
138
139 if (priv->int_buf.in_use)
140 return STATUS_FAILURE;
141
142 priv->int_buf.in_use = true;
143
144 usb_fill_int_urb(priv->interrupt_urb,
145 priv->usb,
146 usb_rcvintpipe(priv->usb, 1),
147 priv->int_buf.data_buf,
148 MAX_INTERRUPT_SIZE,
149 vnt_start_interrupt_urb_complete,
150 priv,
151 priv->int_interval);
152
153 status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
154 if (status) {
155 dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
156 priv->int_buf.in_use = false;
157 }
158
159 return status;
160}
161
162static void vnt_submit_rx_urb_complete(struct urb *urb)
163{
164 struct vnt_rcb *rcb = urb->context;
165 struct vnt_private *priv = rcb->priv;
166
167 switch (urb->status) {
168 case 0:
169 break;
170 case -ECONNRESET:
171 case -ENOENT:
172 case -ESHUTDOWN:
173 return;
174 case -ETIMEDOUT:
175 default:
176 dev_dbg(&priv->usb->dev, "BULK In failed %d\n", urb->status);
177 break;
178 }
179
180 if (urb->actual_length) {
181 if (vnt_rx_data(priv, rcb, urb->actual_length)) {
182 rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
183 if (!rcb->skb) {
184 dev_dbg(&priv->usb->dev,
185 "Failed to re-alloc rx skb\n");
186
187 rcb->in_use = false;
188 return;
189 }
190 } else {
191 skb_push(rcb->skb, skb_headroom(rcb->skb));
192 skb_trim(rcb->skb, 0);
193 }
194
195 urb->transfer_buffer = skb_put(rcb->skb,
196 skb_tailroom(rcb->skb));
197 }
198
199 if (usb_submit_urb(urb, GFP_ATOMIC)) {
200 dev_dbg(&priv->usb->dev, "Failed to re submit rx skb\n");
201
202 rcb->in_use = false;
203 }
204}
205
206int vnt_submit_rx_urb(struct vnt_private *priv, struct vnt_rcb *rcb)
207{
208 int status = 0;
209 struct urb *urb = rcb->urb;
210
211 if (!rcb->skb) {
212 dev_dbg(&priv->usb->dev, "rcb->skb is null\n");
213 return status;
214 }
215
216 usb_fill_bulk_urb(urb,
217 priv->usb,
218 usb_rcvbulkpipe(priv->usb, 2),
219 skb_put(rcb->skb, skb_tailroom(rcb->skb)),
220 MAX_TOTAL_SIZE_WITH_ALL_HEADERS,
221 vnt_submit_rx_urb_complete,
222 rcb);
223
224 status = usb_submit_urb(urb, GFP_ATOMIC);
225 if (status) {
226 dev_dbg(&priv->usb->dev, "Submit Rx URB failed %d\n", status);
227 return STATUS_FAILURE;
228 }
229
230 rcb->in_use = true;
231
232 return status;
233}
234
235static void vnt_tx_context_complete(struct urb *urb)
236{
237 struct vnt_usb_send_context *context = urb->context;
238 struct vnt_private *priv = context->priv;
239
240 switch (urb->status) {
241 case 0:
242 dev_dbg(&priv->usb->dev, "Write %d bytes\n", context->buf_len);
243 break;
244 case -ECONNRESET:
245 case -ENOENT:
246 case -ESHUTDOWN:
247 context->in_use = false;
248 return;
249 case -ETIMEDOUT:
250 default:
251 dev_dbg(&priv->usb->dev, "BULK Out failed %d\n", urb->status);
252 break;
253 }
254
255 if (context->type == CONTEXT_DATA_PACKET)
256 ieee80211_wake_queues(priv->hw);
257
258 if (urb->status || context->type == CONTEXT_BEACON_PACKET) {
259 if (context->skb)
260 ieee80211_free_txskb(priv->hw, context->skb);
261
262 context->in_use = false;
263 }
264}
265
266int vnt_tx_context(struct vnt_private *priv,
267 struct vnt_usb_send_context *context)
268{
269 int status;
270 struct urb *urb = context->urb;
271
272 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
273 context->in_use = false;
274 return STATUS_RESOURCES;
275 }
276
277 usb_fill_bulk_urb(urb,
278 priv->usb,
279 usb_sndbulkpipe(priv->usb, 3),
280 context->data,
281 context->buf_len,
282 vnt_tx_context_complete,
283 context);
284
285 status = usb_submit_urb(urb, GFP_ATOMIC);
286 if (status) {
287 dev_dbg(&priv->usb->dev, "Submit Tx URB failed %d\n", status);
288
289 context->in_use = false;
290 return STATUS_FAILURE;
291 }
292
293 return STATUS_PENDING;
294}