1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
8 * Purpose: Handle USB control endpoint
15 * vnt_control_out - Write variable length bytes to MEM/BB/MAC/EEPROM
16 * vnt_control_in - Read variable length bytes from MEM/BB/MAC/EEPROM
17 * vnt_control_out_u8 - Write one byte to MEM/BB/MAC/EEPROM
18 * vnt_control_in_u8 - Read one byte from MEM/BB/MAC/EEPROM
21 * 04-05-2004 Jerry Chen: Initial release
22 * 11-24-2004 Warren Hsu: Add ControlvWriteByte,ControlvReadByte,
34 #define USB_CTL_WAIT 500 /* ms */
36 int vnt_control_out(struct vnt_private *priv, u8 request, u16 value,
37 u16 index, u16 length, u8 *buffer)
42 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
47 mutex_lock(&priv->usb_lock);
49 usb_buffer = kmemdup(buffer, length, GFP_KERNEL);
55 ret = usb_control_msg(priv->usb,
56 usb_sndctrlpipe(priv->usb, 0),
58 index, usb_buffer, length, USB_CTL_WAIT);
62 if (ret >= 0 && ret < (int)length)
66 mutex_unlock(&priv->usb_lock);
71 int vnt_control_out_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 data)
73 return vnt_control_out(priv, MESSAGE_TYPE_WRITE,
74 reg_off, reg, sizeof(u8), &data);
77 int vnt_control_in(struct vnt_private *priv, u8 request, u16 value,
78 u16 index, u16 length, u8 *buffer)
83 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
88 mutex_lock(&priv->usb_lock);
90 usb_buffer = kmalloc(length, GFP_KERNEL);
96 ret = usb_control_msg(priv->usb,
97 usb_rcvctrlpipe(priv->usb, 0),
99 index, usb_buffer, length, USB_CTL_WAIT);
102 memcpy(buffer, usb_buffer, length);
106 if (ret >= 0 && ret < (int)length)
110 mutex_unlock(&priv->usb_lock);
115 int vnt_control_in_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 *data)
117 return vnt_control_in(priv, MESSAGE_TYPE_READ,
118 reg_off, reg, sizeof(u8), data);
121 static void vnt_start_interrupt_urb_complete(struct urb *urb)
123 struct vnt_private *priv = urb->context;
124 int status = urb->status;
133 priv->int_buf.in_use = false;
140 priv->int_buf.in_use = false;
142 dev_dbg(&priv->usb->dev, "%s status = %d\n", __func__, status);
144 vnt_int_process_data(priv);
147 status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
149 dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
151 priv->int_buf.in_use = true;
154 int vnt_start_interrupt_urb(struct vnt_private *priv)
158 if (priv->int_buf.in_use) {
163 priv->int_buf.in_use = true;
165 usb_fill_int_urb(priv->interrupt_urb,
167 usb_rcvintpipe(priv->usb, 1),
168 priv->int_buf.data_buf,
170 vnt_start_interrupt_urb_complete,
174 ret = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
176 dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", ret);
183 priv->int_buf.in_use = false;
188 static void vnt_submit_rx_urb_complete(struct urb *urb)
190 struct vnt_rcb *rcb = urb->context;
191 struct vnt_private *priv = rcb->priv;
193 switch (urb->status) {
202 dev_dbg(&priv->usb->dev, "BULK In failed %d\n", urb->status);
206 if (urb->actual_length) {
207 if (vnt_rx_data(priv, rcb, urb->actual_length)) {
208 rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
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");
240 usb_fill_bulk_urb(urb,
242 usb_rcvbulkpipe(priv->usb, 2),
243 skb_put(rcb->skb, skb_tailroom(rcb->skb)),
244 MAX_TOTAL_SIZE_WITH_ALL_HEADERS,
245 vnt_submit_rx_urb_complete,
248 ret = usb_submit_urb(urb, GFP_ATOMIC);
250 dev_dbg(&priv->usb->dev, "Submit Rx URB failed %d\n", ret);
260 static void vnt_tx_context_complete(struct urb *urb)
262 struct vnt_usb_send_context *context = urb->context;
263 struct vnt_private *priv = context->priv;
265 switch (urb->status) {
267 dev_dbg(&priv->usb->dev, "Write %d bytes\n", context->buf_len);
272 context->in_use = false;
276 dev_dbg(&priv->usb->dev, "BULK Out failed %d\n", urb->status);
280 if (context->type == CONTEXT_DATA_PACKET)
281 ieee80211_wake_queues(priv->hw);
283 if (urb->status || context->type == CONTEXT_BEACON_PACKET) {
285 ieee80211_free_txskb(priv->hw, context->skb);
287 context->in_use = false;
291 int vnt_tx_context(struct vnt_private *priv,
292 struct vnt_usb_send_context *context)
295 struct urb *urb = context->urb;
297 if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
298 context->in_use = false;
299 return STATUS_RESOURCES;
302 usb_fill_bulk_urb(urb,
304 usb_sndbulkpipe(priv->usb, 3),
307 vnt_tx_context_complete,
310 status = usb_submit_urb(urb, GFP_ATOMIC);
312 dev_dbg(&priv->usb->dev, "Submit Tx URB failed %d\n", status);
314 context->in_use = false;
315 return STATUS_FAILURE;
318 return STATUS_PENDING;