| /* |
| * 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. |
| * |
| * |
| * 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 = 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) { |
| dev_dbg(&priv->usb->dev, |
| "Failed to re-alloc rx skb\n"); |
| |
| 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; |
| } |