mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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Add rt2x00-mac80211 snapshot (#1916)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8184 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
florian
515
package/rt2x00/src/rt2x00usb.c
Normal file
515
package/rt2x00/src/rt2x00usb.c
Normal file
@@ -0,0 +1,515 @@
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/*
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Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
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<http://rt2x00.serialmonkey.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the
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Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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Module: rt2x00usb
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Abstract: rt2x00 generic usb device routines.
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Supported chipsets: rt2570, rt2571W & rt2671.
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*/
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/*
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* Set enviroment defines for rt2x00.h
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*/
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#define DRV_NAME "rt2x00usb"
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/version.h>
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#include <linux/init.h>
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#include <linux/usb.h>
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#include "rt2x00.h"
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#include "rt2x00usb.h"
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/*
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* Interfacing with the HW.
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*/
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int rt2x00usb_vendor_request(const struct rt2x00_dev *rt2x00dev,
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const u8 request, const u8 type, const u16 offset,
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u32 value, void *buffer, const u16 buffer_length, const u16 timeout)
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{
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struct usb_device *usb_dev = interface_to_usbdev(
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rt2x00dev_usb(rt2x00dev));
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int status;
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unsigned int i;
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for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
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status = usb_control_msg(
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usb_dev,
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(type == USB_VENDOR_REQUEST_IN) ?
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usb_rcvctrlpipe(usb_dev, 0) :
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usb_sndctrlpipe(usb_dev, 0),
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request, type, value, offset, buffer, buffer_length,
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timeout);
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if (status >= 0)
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return 0;
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}
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ERROR(rt2x00dev, "vendor request error. Request 0x%02x failed "
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"for offset 0x%04x with error %d.\n", request, offset, status);
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return status;
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request);
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/*
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* Radio handlers
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*/
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void rt2x00usb_enable_radio(struct rt2x00_dev *rt2x00dev)
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{
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unsigned int i;
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/*
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* Start the RX ring.
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*/
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for (i = 0; i < rt2x00dev->rx->stats.limit; i++) {
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__set_bit(ENTRY_OWNER_NIC, &rt2x00dev->rx->entry[i].flags);
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usb_submit_urb(rt2x00dev->rx->entry[i].priv, GFP_ATOMIC);
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}
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_enable_radio);
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void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
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{
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struct data_ring *ring;
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unsigned int i;
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rt2x00usb_vendor_request(rt2x00dev, USB_RX_CONTROL,
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USB_VENDOR_REQUEST_OUT, 0x00, 0x00, NULL, 0, REGISTER_TIMEOUT);
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/*
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* Cancel all rings.
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*/
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ring_for_each(rt2x00dev, ring) {
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for (i = 0; i < ring->stats.limit; i++)
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usb_kill_urb(ring->entry[i].priv);
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}
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
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/*
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* Beacon handlers.
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*/
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int rt2x00usb_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
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struct ieee80211_tx_control *control)
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{
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struct rt2x00_dev *rt2x00dev = hw->priv;
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struct usb_device *usb_dev =
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interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
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struct data_ring *ring =
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rt2x00_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
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struct data_entry *beacon;
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struct data_entry *guardian;
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int length;
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/*
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* Just in case the ieee80211 doesn't set this,
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* but we need this queue set for the descriptor
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* initialization.
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*/
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control->queue = IEEE80211_TX_QUEUE_BEACON;
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/*
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* Obtain 2 entries, one for the guardian byte,
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* the second for the actual beacon.
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*/
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guardian = rt2x00_get_data_entry(ring);
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rt2x00_ring_index_inc(ring);
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beacon = rt2x00_get_data_entry(ring);
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/*
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* First we create the beacon.
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*/
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skb_push(skb, ring->desc_size);
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rt2x00lib_write_tx_desc(rt2x00dev, beacon,
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(struct data_desc*)skb->data,
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(struct ieee80211_hdr*)(skb->data + ring->desc_size),
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skb->len - ring->desc_size,
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control);
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/*
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* Length passed to usb_fill_urb cannot be an odd number,
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* so add 1 byte to make it even.
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*/
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length = skb->len;
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if (length % 2)
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length++;
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usb_fill_bulk_urb(
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beacon->priv,
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usb_dev,
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usb_sndbulkpipe(usb_dev, 1),
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skb->data,
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length,
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rt2x00usb_beacondone,
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beacon);
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beacon->skb = skb;
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/*
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* Second we need to create the guardian byte.
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* We only need a single byte, so lets recycle
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* the 'flags' field we are not using for beacons.
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*/
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guardian->flags = 0;
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usb_fill_bulk_urb(
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guardian->priv,
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usb_dev,
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usb_sndbulkpipe(usb_dev, 1),
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&guardian->flags,
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1,
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rt2x00usb_beacondone,
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guardian);
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/*
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* Send out the guardian byte.
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*/
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usb_submit_urb(guardian->priv, GFP_ATOMIC);
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/*
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* Enable beacon generation.
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*/
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rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, control->queue);
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return 0;
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_beacon_update);
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void rt2x00usb_beacondone(struct urb *urb)
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{
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struct data_entry *entry = (struct data_entry*)urb->context;
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struct data_ring *ring = entry->ring;
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if (!test_bit(DEVICE_ENABLED_RADIO, &ring->rt2x00dev->flags))
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return;
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/*
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* Check if this was the guardian beacon,
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* if that was the case we need to send the real beacon now.
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* Otherwise we should free the sk_buffer, the device
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* should be doing the rest of the work now.
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*/
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if (ring->index == 1) {
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rt2x00_ring_index_done_inc(ring);
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entry = rt2x00_get_data_entry(ring);
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usb_submit_urb(entry->priv, GFP_ATOMIC);
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rt2x00_ring_index_inc(ring);
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} else if (ring->index_done == 1) {
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entry = rt2x00_get_data_entry_done(ring);
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if (entry->skb) {
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dev_kfree_skb(entry->skb);
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entry->skb = NULL;
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}
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rt2x00_ring_index_done_inc(ring);
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}
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_beacondone);
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/*
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* TX data handlers.
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*/
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static void rt2x00usb_interrupt_txdone(struct urb *urb)
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{
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struct data_entry *entry = (struct data_entry*)urb->context;
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struct data_ring *ring = entry->ring;
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struct rt2x00_dev *rt2x00dev = ring->rt2x00dev;
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struct data_desc *txd = (struct data_desc *)entry->skb->data;
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u32 word;
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int tx_status;
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if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
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!__test_and_clear_bit(ENTRY_OWNER_NIC, &entry->flags))
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return;
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rt2x00_desc_read(txd, 0, &word);
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/*
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* Remove the descriptor data from the buffer.
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*/
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skb_pull(entry->skb, ring->desc_size);
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/*
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* Obtain the status about this packet.
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*/
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tx_status = !urb->status ? TX_SUCCESS : TX_FAIL_RETRY;
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rt2x00lib_txdone(entry, tx_status, 0);
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/*
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* Make this entry available for reuse.
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*/
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entry->flags = 0;
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rt2x00_ring_index_done_inc(entry->ring);
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/*
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* If the data ring was full before the txdone handler
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* we must make sure the packet queue in the mac80211 stack
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* is reenabled when the txdone handler has finished.
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*/
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if (!rt2x00_ring_full(ring))
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ieee80211_wake_queue(rt2x00dev->hw,
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entry->tx_status.control.queue);
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}
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int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
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struct data_ring *ring, struct sk_buff *skb,
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struct ieee80211_tx_control *control)
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{
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struct usb_device *usb_dev =
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interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
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struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr*)skb->data;
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struct data_entry *entry = rt2x00_get_data_entry(ring);
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struct data_desc *txd;
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u32 length = skb->len;
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if (rt2x00_ring_full(ring)) {
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ieee80211_stop_queue(rt2x00dev->hw, control->queue);
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return -EINVAL;
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}
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if (test_bit(ENTRY_OWNER_NIC, &entry->flags)) {
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ERROR(rt2x00dev,
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"Arrived at non-free entry in the non-full queue %d.\n"
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"Please file bug report to %s.\n",
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control->queue, DRV_PROJECT);
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ieee80211_stop_queue( rt2x00dev->hw, control->queue);
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return -EINVAL;
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}
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skb_push(skb, rt2x00dev->hw->extra_tx_headroom);
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txd = (struct data_desc*)skb->data;
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rt2x00lib_write_tx_desc(rt2x00dev, entry, txd, ieee80211hdr,
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length, control);
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memcpy(&entry->tx_status.control, control, sizeof(*control));
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entry->skb = skb;
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/*
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* Length passed to usb_fill_urb cannot be an odd number,
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* so add 1 byte to make it even.
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*/
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length += rt2x00dev->hw->extra_tx_headroom;
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if (length % 2)
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length++;
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__set_bit(ENTRY_OWNER_NIC, &entry->flags);
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usb_fill_bulk_urb(
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entry->priv,
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usb_dev,
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usb_sndbulkpipe(usb_dev, 1),
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skb->data,
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length,
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rt2x00usb_interrupt_txdone,
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entry);
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usb_submit_urb(entry->priv, GFP_ATOMIC);
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rt2x00_ring_index_inc(ring);
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if (rt2x00_ring_full(ring))
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ieee80211_stop_queue(rt2x00dev->hw, control->queue);
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return 0;
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data);
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/*
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* Device initialization handlers.
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*/
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static int rt2x00usb_alloc_ring(struct rt2x00_dev *rt2x00dev,
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struct data_ring *ring)
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{
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unsigned int i;
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|
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/*
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* Allocate the URB's
|
||||
*/
|
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for (i = 0; i < ring->stats.limit; i++) {
|
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ring->entry[i].priv = usb_alloc_urb(0, GFP_KERNEL);
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if (!ring->entry[i].priv)
|
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return -ENOMEM;
|
||||
}
|
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|
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return 0;
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}
|
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int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
|
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{
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struct data_ring *ring;
|
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struct sk_buff *skb;
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unsigned int entry_size;
|
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unsigned int i;
|
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int status;
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|
||||
/*
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* Allocate DMA
|
||||
*/
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ring_for_each(rt2x00dev, ring) {
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status = rt2x00usb_alloc_ring(rt2x00dev, ring);
|
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if (status)
|
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goto exit;
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||||
}
|
||||
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||||
/*
|
||||
* For the RX ring, skb's should be allocated.
|
||||
*/
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||||
entry_size = ring->data_size + ring->desc_size;
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for (i = 0; i < rt2x00dev->rx->stats.limit; i++) {
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||||
skb = dev_alloc_skb(NET_IP_ALIGN + entry_size);
|
||||
if (!skb)
|
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goto exit;
|
||||
|
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skb_reserve(skb, NET_IP_ALIGN);
|
||||
skb_put(skb, entry_size);
|
||||
|
||||
rt2x00dev->rx->entry[i].skb = skb;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
exit:
|
||||
rt2x00usb_uninitialize(rt2x00dev);
|
||||
|
||||
return status;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(rt2x00usb_initialize);
|
||||
|
||||
void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev)
|
||||
{
|
||||
struct data_ring *ring;
|
||||
unsigned int i;
|
||||
|
||||
ring_for_each(rt2x00dev, ring) {
|
||||
if (!ring->entry)
|
||||
continue;
|
||||
|
||||
for (i = 0; i < ring->stats.limit; i++) {
|
||||
usb_kill_urb(ring->entry[i].priv);
|
||||
usb_free_urb(ring->entry[i].priv);
|
||||
if (ring->entry[i].skb)
|
||||
kfree_skb(ring->entry[i].skb);
|
||||
}
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize);
|
||||
|
||||
/*
|
||||
* USB driver handlers.
|
||||
*/
|
||||
int rt2x00usb_probe(struct usb_interface *usb_intf,
|
||||
const struct usb_device_id *id)
|
||||
{
|
||||
struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
|
||||
struct rt2x00_ops *ops = (struct rt2x00_ops*)id->driver_info;
|
||||
struct ieee80211_hw *hw;
|
||||
struct rt2x00_dev *rt2x00dev;
|
||||
int retval;
|
||||
|
||||
usb_dev = usb_get_dev(usb_dev);
|
||||
|
||||
hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
|
||||
if (!hw) {
|
||||
ERROR_PROBE("Failed to allocate hardware.\n");
|
||||
retval = -ENOMEM;
|
||||
goto exit_put_device;
|
||||
}
|
||||
|
||||
usb_set_intfdata(usb_intf, hw);
|
||||
|
||||
rt2x00dev = hw->priv;
|
||||
rt2x00dev->dev = usb_intf;
|
||||
rt2x00dev->device = &usb_intf->dev;
|
||||
rt2x00dev->ops = ops;
|
||||
rt2x00dev->hw = hw;
|
||||
|
||||
retval = rt2x00lib_probe_dev(rt2x00dev);
|
||||
if (retval)
|
||||
goto exit_free_device;
|
||||
|
||||
return 0;
|
||||
|
||||
exit_free_device:
|
||||
ieee80211_free_hw(hw);
|
||||
|
||||
exit_put_device:
|
||||
usb_put_dev(usb_dev);
|
||||
|
||||
usb_set_intfdata(usb_intf, NULL);
|
||||
|
||||
return retval;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(rt2x00usb_probe);
|
||||
|
||||
void rt2x00usb_disconnect(struct usb_interface *usb_intf)
|
||||
{
|
||||
struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
|
||||
struct rt2x00_dev *rt2x00dev = hw->priv;
|
||||
|
||||
/*
|
||||
* Free all allocated data.
|
||||
*/
|
||||
rt2x00lib_remove_dev(rt2x00dev);
|
||||
ieee80211_free_hw(hw);
|
||||
|
||||
/*
|
||||
* Free the USB device data.
|
||||
*/
|
||||
usb_set_intfdata(usb_intf, NULL);
|
||||
usb_put_dev(interface_to_usbdev(usb_intf));
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(rt2x00usb_disconnect);
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state)
|
||||
{
|
||||
struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
|
||||
struct rt2x00_dev *rt2x00dev = hw->priv;
|
||||
int retval;
|
||||
|
||||
retval = rt2x00lib_suspend(rt2x00dev, state);
|
||||
if (retval)
|
||||
return retval;
|
||||
|
||||
/*
|
||||
* Decrease usbdev refcount.
|
||||
*/
|
||||
usb_put_dev(interface_to_usbdev(usb_intf));
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(rt2x00usb_suspend);
|
||||
|
||||
int rt2x00usb_resume(struct usb_interface *usb_intf)
|
||||
{
|
||||
struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
|
||||
struct rt2x00_dev *rt2x00dev = hw->priv;
|
||||
|
||||
usb_get_dev(interface_to_usbdev(usb_intf));
|
||||
|
||||
return rt2x00lib_resume(rt2x00dev);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(rt2x00usb_resume);
|
||||
#endif /* CONFIG_PM */
|
||||
|
||||
/*
|
||||
* rt2x00pci module information.
|
||||
*/
|
||||
MODULE_AUTHOR(DRV_PROJECT);
|
||||
MODULE_VERSION(DRV_VERSION);
|
||||
MODULE_DESCRIPTION("rt2x00 library");
|
||||
MODULE_LICENSE("GPL");
|
||||
Reference in New Issue
Block a user