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path: root/drivers/staging/vt6656/usbpipe.c
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Diffstat (limited to 'drivers/staging/vt6656/usbpipe.c')
-rw-r--r--drivers/staging/vt6656/usbpipe.c440
1 files changed, 440 insertions, 0 deletions
diff --git a/drivers/staging/vt6656/usbpipe.c b/drivers/staging/vt6656/usbpipe.c
new file mode 100644
index 00000000000..e4751b71e4d
--- /dev/null
+++ b/drivers/staging/vt6656/usbpipe.c
@@ -0,0 +1,440 @@
+/*
+ * 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
+ * ControlvMaskByte - Read one byte from MEM/BB/MAC/EEPROM and clear/set some bits in the same address
+ *
+ * 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"
+
+//endpoint def
+//endpoint 0: control
+//endpoint 1: interrupt
+//endpoint 2: read bulk
+//endpoint 3: write bulk
+
+#define USB_CTL_WAIT 500 //ms
+
+#ifndef URB_ASYNC_UNLINK
+#define URB_ASYNC_UNLINK 0
+#endif
+
+static void s_nsInterruptUsbIoCompleteRead(struct urb *urb);
+static void s_nsBulkInUsbIoCompleteRead(struct urb *urb);
+static void s_nsBulkOutIoCompleteWrite(struct urb *urb);
+
+int vnt_control_out(struct vnt_private *priv, u8 request, u16 value,
+ u16 index, u16 length, u8 *buffer)
+{
+ int status = 0;
+
+ if (priv->Flags & fMP_DISCONNECTED)
+ 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 (priv->Flags & fMP_DISCONNECTED)
+ 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);
+}
+
+/*
+ * Description:
+ * Allocates an usb interrupt in irp and calls USBD.
+ *
+ * Parameters:
+ * In:
+ * pDevice - Pointer to the adapter
+ * Out:
+ * none
+ *
+ * Return Value: STATUS_INSUFFICIENT_RESOURCES or result of IoCallDriver
+ *
+ */
+
+int PIPEnsInterruptRead(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->pInterruptURB,
+ priv->usb,
+ usb_rcvintpipe(priv->usb, 1),
+ priv->int_buf.data_buf,
+ MAX_INTERRUPT_SIZE,
+ s_nsInterruptUsbIoCompleteRead,
+ priv,
+ priv->int_interval);
+
+ status = usb_submit_urb(priv->pInterruptURB, GFP_ATOMIC);
+ if (status) {
+ dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
+ priv->int_buf.in_use = false;
+ }
+
+ return status;
+}
+
+/*
+ * Description:
+ * Complete function of usb interrupt in irp.
+ *
+ * Parameters:
+ * In:
+ * pDevice - Pointer to the adapter
+ *
+ * Out:
+ * none
+ *
+ * Return Value: STATUS_INSUFFICIENT_RESOURCES or result of IoCallDriver
+ *
+ */
+
+static void s_nsInterruptUsbIoCompleteRead(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 {
+ INTnsProcessData(priv);
+ }
+
+ status = usb_submit_urb(priv->pInterruptURB, GFP_ATOMIC);
+ if (status) {
+ dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
+ } else {
+ priv->int_buf.in_use = true;
+ }
+
+ return;
+}
+
+/*
+ * Description:
+ * Allocates an usb BulkIn irp and calls USBD.
+ *
+ * Parameters:
+ * In:
+ * pDevice - Pointer to the adapter
+ * Out:
+ * none
+ *
+ * Return Value: STATUS_INSUFFICIENT_RESOURCES or result of IoCallDriver
+ *
+ */
+
+int PIPEnsBulkInUsbRead(struct vnt_private *priv, struct vnt_rcb *rcb)
+{
+ int status = 0;
+ struct urb *urb;
+
+ if (priv->Flags & fMP_DISCONNECTED)
+ return STATUS_FAILURE;
+
+ urb = rcb->pUrb;
+ 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),
+ (void *) (rcb->skb->data),
+ MAX_TOTAL_SIZE_WITH_ALL_HEADERS,
+ s_nsBulkInUsbIoCompleteRead,
+ 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->Ref = 1;
+ rcb->bBoolInUse = true;
+
+ return status;
+}
+
+/*
+ * Description:
+ * Complete function of usb BulkIn irp.
+ *
+ * Parameters:
+ * In:
+ * pDevice - Pointer to the adapter
+ *
+ * Out:
+ * none
+ *
+ * Return Value: STATUS_INSUFFICIENT_RESOURCES or result of IoCallDriver
+ *
+ */
+
+static void s_nsBulkInUsbIoCompleteRead(struct urb *urb)
+{
+ struct vnt_rcb *rcb = urb->context;
+ struct vnt_private *priv = rcb->pDevice;
+ unsigned long flags;
+ int re_alloc_skb = false;
+
+ 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 (RXbBulkInProcessData(priv, rcb, urb->actual_length) == true)
+ re_alloc_skb = true;
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+ }
+
+ rcb->Ref--;
+ if (rcb->Ref == 0) {
+ dev_dbg(&priv->usb->dev,
+ "RxvFreeNormal %d\n", priv->NumRecvFreeList);
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ RXvFreeRCB(rcb, re_alloc_skb);
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+ }
+
+ return;
+}
+
+/*
+ * Description:
+ * Allocates an usb BulkOut irp and calls USBD.
+ *
+ * Parameters:
+ * In:
+ * pDevice - Pointer to the adapter
+ * Out:
+ * none
+ *
+ * Return Value: STATUS_INSUFFICIENT_RESOURCES or result of IoCallDriver
+ *
+ */
+
+int PIPEnsSendBulkOut(struct vnt_private *priv,
+ struct vnt_usb_send_context *context)
+{
+ int status;
+ struct urb *urb;
+
+ priv->bPWBitOn = false;
+
+ if (!(MP_IS_READY(priv) && priv->Flags & fMP_POST_WRITES)) {
+ 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,
+ s_nsBulkOutIoCompleteWrite,
+ 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;
+}
+
+/*
+ * Description: s_nsBulkOutIoCompleteWrite
+ * 1a) Indicate to the protocol the status of the write.
+ * 1b) Return ownership of the packet to the protocol.
+ *
+ * 2) If any more packets are queue for sending, send another packet
+ * to USBD.
+ * If the attempt to send the packet to the driver fails,
+ * return ownership of the packet to the protocol and
+ * try another packet (until one succeeds).
+ *
+ * Parameters:
+ * In:
+ * pdoUsbDevObj - pointer to the USB device object which
+ * completed the irp
+ * pIrp - the irp which was completed by the
+ * device object
+ * pContext - the context given to IoSetCompletionRoutine
+ * before calling IoCallDriver on the irp
+ * The pContext is a pointer to the USB device object.
+ * Out:
+ * none
+ *
+ * Return Value: STATUS_MORE_PROCESSING_REQUIRED - allows the completion routine
+ * (IofCompleteRequest) to stop working on the irp.
+ *
+ */
+
+static void s_nsBulkOutIoCompleteWrite(struct urb *urb)
+{
+ struct vnt_usb_send_context *context = urb->context;
+ struct vnt_private *priv = context->priv;
+ u8 context_type = context->type;
+
+ 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 (!netif_device_present(priv->dev))
+ return;
+
+ if (CONTEXT_DATA_PACKET == context_type) {
+ if (context->skb != NULL) {
+ dev_kfree_skb_irq(context->skb);
+ context->skb = NULL;
+ dev_dbg(&priv->usb->dev,
+ "tx %d bytes\n", context->buf_len);
+ }
+
+ priv->dev->trans_start = jiffies;
+ }
+
+ if (priv->bLinkPass == true) {
+ if (netif_queue_stopped(priv->dev))
+ netif_wake_queue(priv->dev);
+ }
+
+ context->in_use = false;
+
+ return;
+}
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