2 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
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.
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.
18 * Purpose: Handle USB control endpoint
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
31 * 04-05-2004 Jerry Chen: Initial release
32 * 11-24-2004 Warren Hsu: Add ControlvWriteByte,ControlvReadByte,
44 #define USB_CTL_WAIT 500 /* ms */
46 int vnt_control_out(struct vnt_private *priv, u8 request, u16 value,
47 u16 index, u16 length, u8 *buffer)
52 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
53 return STATUS_FAILURE;
55 mutex_lock(&priv->usb_lock);
57 usb_buffer = kmemdup(buffer, length, GFP_KERNEL);
59 mutex_unlock(&priv->usb_lock);
63 status = usb_control_msg(priv->usb,
64 usb_sndctrlpipe(priv->usb, 0),
66 index, usb_buffer, length, USB_CTL_WAIT);
70 mutex_unlock(&priv->usb_lock);
72 if (status < (int)length)
73 return STATUS_FAILURE;
75 return STATUS_SUCCESS;
78 void vnt_control_out_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 data)
80 vnt_control_out(priv, MESSAGE_TYPE_WRITE,
81 reg_off, reg, sizeof(u8), &data);
84 int vnt_control_in(struct vnt_private *priv, u8 request, u16 value,
85 u16 index, u16 length, u8 *buffer)
90 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
91 return STATUS_FAILURE;
93 mutex_lock(&priv->usb_lock);
95 usb_buffer = kmalloc(length, GFP_KERNEL);
97 mutex_unlock(&priv->usb_lock);
101 status = usb_control_msg(priv->usb,
102 usb_rcvctrlpipe(priv->usb, 0),
103 request, 0xc0, value,
104 index, usb_buffer, length, USB_CTL_WAIT);
106 if (status == length)
107 memcpy(buffer, usb_buffer, length);
111 mutex_unlock(&priv->usb_lock);
113 if (status < (int)length)
114 return STATUS_FAILURE;
116 return STATUS_SUCCESS;
119 void vnt_control_in_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 *data)
121 vnt_control_in(priv, MESSAGE_TYPE_READ,
122 reg_off, reg, sizeof(u8), data);
125 static void vnt_start_interrupt_urb_complete(struct urb *urb)
127 struct vnt_private *priv = urb->context;
128 int status = urb->status;
137 priv->int_buf.in_use = false;
144 priv->int_buf.in_use = false;
146 dev_dbg(&priv->usb->dev, "%s status = %d\n", __func__, status);
148 vnt_int_process_data(priv);
151 status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
153 dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
155 priv->int_buf.in_use = true;
158 int vnt_start_interrupt_urb(struct vnt_private *priv)
160 int status = STATUS_FAILURE;
162 if (priv->int_buf.in_use)
163 return STATUS_FAILURE;
165 priv->int_buf.in_use = true;
167 usb_fill_int_urb(priv->interrupt_urb,
169 usb_rcvintpipe(priv->usb, 1),
170 priv->int_buf.data_buf,
172 vnt_start_interrupt_urb_complete,
176 status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
178 dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
179 priv->int_buf.in_use = false;
185 static void vnt_submit_rx_urb_complete(struct urb *urb)
187 struct vnt_rcb *rcb = urb->context;
188 struct vnt_private *priv = rcb->priv;
190 switch (urb->status) {
199 dev_dbg(&priv->usb->dev, "BULK In failed %d\n", urb->status);
203 if (urb->actual_length) {
204 if (vnt_rx_data(priv, rcb, urb->actual_length)) {
205 rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
207 dev_dbg(&priv->usb->dev,
208 "Failed to re-alloc rx skb\n");
214 skb_push(rcb->skb, skb_headroom(rcb->skb));
215 skb_trim(rcb->skb, 0);
218 urb->transfer_buffer = skb_put(rcb->skb,
219 skb_tailroom(rcb->skb));
222 if (usb_submit_urb(urb, GFP_ATOMIC)) {
223 dev_dbg(&priv->usb->dev, "Failed to re submit rx skb\n");
229 int vnt_submit_rx_urb(struct vnt_private *priv, struct vnt_rcb *rcb)
232 struct urb *urb = rcb->urb;
235 dev_dbg(&priv->usb->dev, "rcb->skb is null\n");
239 usb_fill_bulk_urb(urb,
241 usb_rcvbulkpipe(priv->usb, 2),
242 skb_put(rcb->skb, skb_tailroom(rcb->skb)),
243 MAX_TOTAL_SIZE_WITH_ALL_HEADERS,
244 vnt_submit_rx_urb_complete,
247 status = usb_submit_urb(urb, GFP_ATOMIC);
249 dev_dbg(&priv->usb->dev, "Submit Rx URB failed %d\n", status);
250 return STATUS_FAILURE;
258 static void vnt_tx_context_complete(struct urb *urb)
260 struct vnt_usb_send_context *context = urb->context;
261 struct vnt_private *priv = context->priv;
263 switch (urb->status) {
265 dev_dbg(&priv->usb->dev, "Write %d bytes\n", context->buf_len);
270 context->in_use = false;
274 dev_dbg(&priv->usb->dev, "BULK Out failed %d\n", urb->status);
278 if (context->type == CONTEXT_DATA_PACKET)
279 ieee80211_wake_queues(priv->hw);
281 if (urb->status || context->type == CONTEXT_BEACON_PACKET) {
283 ieee80211_free_txskb(priv->hw, context->skb);
285 context->in_use = false;
289 int vnt_tx_context(struct vnt_private *priv,
290 struct vnt_usb_send_context *context)
293 struct urb *urb = context->urb;
295 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
296 context->in_use = false;
297 return STATUS_RESOURCES;
300 usb_fill_bulk_urb(urb,
302 usb_sndbulkpipe(priv->usb, 3),
305 vnt_tx_context_complete,
308 status = usb_submit_urb(urb, GFP_ATOMIC);
310 dev_dbg(&priv->usb->dev, "Submit Tx URB failed %d\n", status);
312 context->in_use = false;
313 return STATUS_FAILURE;
316 return STATUS_PENDING;