aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/staging/vt6656/usbpipe.c
blob: 88bf518f23eb6c5360ffb07ab8359d08b4fcf33d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
/*
 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 *
 * File: usbpipe.c
 *
 * Purpose: Handle USB control endpoint
 *
 * Author: Warren Hsu
 *
 * Date: Mar. 29, 2005
 *
 * Functions:
 *	vnt_control_out - Write variable length bytes to MEM/BB/MAC/EEPROM
 *	vnt_control_in - Read variable length bytes from MEM/BB/MAC/EEPROM
 *	vnt_control_out_u8 - Write one byte to MEM/BB/MAC/EEPROM
 *	vnt_control_in_u8 - Read one byte from MEM/BB/MAC/EEPROM
 *
 * Revision History:
 *      04-05-2004 Jerry Chen:  Initial release
 *      11-24-2004 Warren Hsu: Add ControlvWriteByte,ControlvReadByte,ControlvMaskByte
 *
 */

#include "int.h"
#include "rxtx.h"
#include "dpc.h"
#include "desc.h"
#include "device.h"
#include "usbpipe.h"

#define USB_CTL_WAIT	500 /* ms */

int vnt_control_out(struct vnt_private *priv, u8 request, u16 value,
		u16 index, u16 length, u8 *buffer)
{
	int status = 0;

	if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
		return STATUS_FAILURE;

	mutex_lock(&priv->usb_lock);

	status = usb_control_msg(priv->usb,
		usb_sndctrlpipe(priv->usb, 0), request, 0x40, value,
			index, buffer, length, USB_CTL_WAIT);

	mutex_unlock(&priv->usb_lock);

	if (status < (int)length)
		return STATUS_FAILURE;

	return STATUS_SUCCESS;
}

void vnt_control_out_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 data)
{
	vnt_control_out(priv, MESSAGE_TYPE_WRITE,
					reg_off, reg, sizeof(u8), &data);
}

int vnt_control_in(struct vnt_private *priv, u8 request, u16 value,
		u16 index, u16 length, u8 *buffer)
{
	int status;

	if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
		return STATUS_FAILURE;

	mutex_lock(&priv->usb_lock);

	status = usb_control_msg(priv->usb,
		usb_rcvctrlpipe(priv->usb, 0), request, 0xc0, value,
			index, buffer, length, USB_CTL_WAIT);

	mutex_unlock(&priv->usb_lock);

	if (status < (int)length)
		return STATUS_FAILURE;

	return STATUS_SUCCESS;
}

void vnt_control_in_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 *data)
{
	vnt_control_in(priv, MESSAGE_TYPE_READ,
			reg_off, reg, sizeof(u8), data);
}

static void vnt_start_interrupt_urb_complete(struct urb *urb)
{
	struct vnt_private *priv = urb->context;
	int status;

	switch (urb->status) {
	case 0:
	case -ETIMEDOUT:
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		priv->int_buf.in_use = false;
		return;
	default:
		break;
	}

	status = urb->status;

	if (status != STATUS_SUCCESS) {
		priv->int_buf.in_use = false;

		dev_dbg(&priv->usb->dev, "%s status = %d\n", __func__, status);
	} else {
		vnt_int_process_data(priv);
	}

	status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
	if (status)
		dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
	else
		priv->int_buf.in_use = true;
}

int vnt_start_interrupt_urb(struct vnt_private *priv)
{
	int status = STATUS_FAILURE;

	if (priv->int_buf.in_use == true)
		return STATUS_FAILURE;

	priv->int_buf.in_use = true;

	usb_fill_int_urb(priv->interrupt_urb,
			 priv->usb,
			 usb_rcvintpipe(priv->usb, 1),
			 priv->int_buf.data_buf,
			 MAX_INTERRUPT_SIZE,
			 vnt_start_interrupt_urb_complete,
			 priv,
			 priv->int_interval);

	status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
	if (status) {
		dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
		priv->int_buf.in_use = false;
	}

	return status;
}

static void vnt_submit_rx_urb_complete(struct urb *urb)
{
	struct vnt_rcb *rcb = urb->context;
	struct vnt_private *priv = rcb->priv;
	unsigned long flags;

	switch (urb->status) {
	case 0:
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		return;
	case -ETIMEDOUT:
	default:
		dev_dbg(&priv->usb->dev, "BULK In failed %d\n", urb->status);
		break;
	}

	if (urb->actual_length) {
		spin_lock_irqsave(&priv->lock, flags);

		if (vnt_rx_data(priv, rcb, urb->actual_length)) {
			rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
			if (!rcb->skb) {
				dev_dbg(&priv->usb->dev,
					"Failed to re-alloc rx skb\n");

				rcb->in_use = false;
				spin_unlock_irqrestore(&priv->lock, flags);
				return;
			}
		} else {
			skb_push(rcb->skb, skb_headroom(rcb->skb));
			skb_trim(rcb->skb, 0);
		}

		urb->transfer_buffer = skb_put(rcb->skb,
						skb_tailroom(rcb->skb));

		spin_unlock_irqrestore(&priv->lock, flags);
	}

	if (usb_submit_urb(urb, GFP_ATOMIC)) {
		dev_dbg(&priv->usb->dev, "Failed to re submit rx skb\n");

		rcb->in_use = false;
	}
}

int vnt_submit_rx_urb(struct vnt_private *priv, struct vnt_rcb *rcb)
{
	int status = 0;
	struct urb *urb;

	urb = rcb->urb;
	if (rcb->skb == NULL) {
		dev_dbg(&priv->usb->dev, "rcb->skb is null\n");
		return status;
	}

	usb_fill_bulk_urb(urb,
			  priv->usb,
			  usb_rcvbulkpipe(priv->usb, 2),
			  skb_put(rcb->skb, skb_tailroom(rcb->skb)),
			  MAX_TOTAL_SIZE_WITH_ALL_HEADERS,
			  vnt_submit_rx_urb_complete,
			  rcb);

	status = usb_submit_urb(urb, GFP_ATOMIC);
	if (status != 0) {
		dev_dbg(&priv->usb->dev, "Submit Rx URB failed %d\n", status);
		return STATUS_FAILURE;
	}

	rcb->in_use = true;

	return status;
}

static void vnt_tx_context_complete(struct urb *urb)
{
	struct vnt_usb_send_context *context = urb->context;
	struct vnt_private *priv = context->priv;

	switch (urb->status) {
	case 0:
		dev_dbg(&priv->usb->dev, "Write %d bytes\n", context->buf_len);
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		context->in_use = false;
		return;
	case -ETIMEDOUT:
	default:
		dev_dbg(&priv->usb->dev, "BULK Out failed %d\n", urb->status);
		break;
	}

	if (context->type == CONTEXT_DATA_PACKET)
		ieee80211_wake_queues(priv->hw);

	if (urb->status || context->type == CONTEXT_BEACON_PACKET) {
		if (context->skb)
			ieee80211_free_txskb(priv->hw, context->skb);

		context->in_use = false;
	}
}

int vnt_tx_context(struct vnt_private *priv,
		   struct vnt_usb_send_context *context)
{
	int status;
	struct urb *urb;

	if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
		context->in_use = false;
		return STATUS_RESOURCES;
	}

	urb = context->urb;

	usb_fill_bulk_urb(urb,
			  priv->usb,
			  usb_sndbulkpipe(priv->usb, 3),
			  context->data,
			  context->buf_len,
			  vnt_tx_context_complete,
			  context);

	status = usb_submit_urb(urb, GFP_ATOMIC);
	if (status != 0) {
		dev_dbg(&priv->usb->dev, "Submit Tx URB failed %d\n", status);

		context->in_use = false;
		return STATUS_FAILURE;
	}

	return STATUS_PENDING;
}

Privacy Policy