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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
* All rights reserved.
*
* 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;
u8 *usb_buffer;
if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
return STATUS_FAILURE;
mutex_lock(&priv->usb_lock);
usb_buffer = kmemdup(buffer, length, GFP_KERNEL);
if (!usb_buffer) {
mutex_unlock(&priv->usb_lock);
return -ENOMEM;
}
status = usb_control_msg(priv->usb,
usb_sndctrlpipe(priv->usb, 0),
request, 0x40, value,
index, usb_buffer, length, USB_CTL_WAIT);
kfree(usb_buffer);
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;
u8 *usb_buffer;
if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
return STATUS_FAILURE;
mutex_lock(&priv->usb_lock);
usb_buffer = kmalloc(length, GFP_KERNEL);
if (!usb_buffer) {
mutex_unlock(&priv->usb_lock);
return -ENOMEM;
}
status = usb_control_msg(priv->usb,
usb_rcvctrlpipe(priv->usb, 0),
request, 0xc0, value,
index, usb_buffer, length, USB_CTL_WAIT);
if (status == length)
memcpy(buffer, usb_buffer, length);
kfree(usb_buffer);
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 = urb->status;
switch (status) {
case 0:
case -ETIMEDOUT:
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
priv->int_buf.in_use = false;
return;
default:
break;
}
if (status) {
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)
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;
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) {
if (vnt_rx_data(priv, rcb, urb->actual_length)) {
rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
if (!rcb->skb) {
rcb->in_use = false;
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));
}
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 = rcb->urb;
if (!rcb->skb) {
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) {
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 = context->urb;
if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
context->in_use = false;
return STATUS_RESOURCES;
}
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) {
dev_dbg(&priv->usb->dev, "Submit Tx URB failed %d\n", status);
context->in_use = false;
return STATUS_FAILURE;
}
return STATUS_PENDING;
}
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