1 files changed, 515 insertions, 0 deletions
diff --git a/package/rt2x00/src/rt2x00usb.c b/package/rt2x00/src/rt2x00usb.c
new file mode 100644
index 0000000000..6b193d023c
--- /dev/null
+++ b/package/rt2x00/src/rt2x00usb.c
@@ -0,0 +1,515 @@
+/*
+	Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
+	<http://rt2x00.serialmonkey.com>
+
+	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.,
+	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+	Module: rt2x00usb
+	Abstract: rt2x00 generic usb device routines.
+	Supported chipsets: rt2570, rt2571W & rt2671.
+ */
+
+/*
+ * Set enviroment defines for rt2x00.h
+ */
+#define DRV_NAME "rt2x00usb"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/usb.h>
+
+#include "rt2x00.h"
+#include "rt2x00usb.h"
+
+/*
+ * Interfacing with the HW.
+ */
+int rt2x00usb_vendor_request(const struct rt2x00_dev *rt2x00dev,
+	const u8 request, const u8 type, const u16 offset,
+	u32 value, void *buffer, const u16 buffer_length, const u16 timeout)
+{
+	struct usb_device *usb_dev = interface_to_usbdev(
+		rt2x00dev_usb(rt2x00dev));
+	int status;
+	unsigned int i;
+
+	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
+		status = usb_control_msg(
+			usb_dev,
+			(type == USB_VENDOR_REQUEST_IN) ?
+				usb_rcvctrlpipe(usb_dev, 0) :
+				usb_sndctrlpipe(usb_dev, 0),
+			request, type, value, offset, buffer, buffer_length,
+			timeout);
+		if (status >= 0)
+			return 0;
+	}
+
+	ERROR(rt2x00dev, "vendor request error. Request 0x%02x failed "
+		"for offset 0x%04x with error %d.\n", request, offset, status);
+
+	return status;
+}
+EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request);
+
+/*
+ * Radio handlers
+ */
+void rt2x00usb_enable_radio(struct rt2x00_dev *rt2x00dev)
+{
+	unsigned int i;
+
+	/*
+	 * Start the RX ring.
+	 */
+	for (i = 0; i < rt2x00dev->rx->stats.limit; i++) {
+		__set_bit(ENTRY_OWNER_NIC, &rt2x00dev->rx->entry[i].flags);
+		usb_submit_urb(rt2x00dev->rx->entry[i].priv, GFP_ATOMIC);
+	}
+}
+EXPORT_SYMBOL_GPL(rt2x00usb_enable_radio);
+
+void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
+{
+	struct data_ring *ring;
+	unsigned int i;
+
+	rt2x00usb_vendor_request(rt2x00dev, USB_RX_CONTROL,
+		USB_VENDOR_REQUEST_OUT, 0x00, 0x00, NULL, 0, REGISTER_TIMEOUT);
+
+	/*
+	 * Cancel all rings.
+	 */
+	ring_for_each(rt2x00dev, ring) {
+		for (i = 0; i < ring->stats.limit; i++)
+			usb_kill_urb(ring->entry[i].priv);
+	}
+}
+EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
+
+/*
+ * Beacon handlers.
+ */
+int rt2x00usb_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
+	struct ieee80211_tx_control *control)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	struct usb_device *usb_dev =
+		interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
+	struct data_ring *ring =
+		rt2x00_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
+	struct data_entry *beacon;
+	struct data_entry *guardian;
+	int length;
+
+	/*
+	 * Just in case the ieee80211 doesn't set this,
+	 * but we need this queue set for the descriptor
+	 * initialization.
+	 */
+	control->queue = IEEE80211_TX_QUEUE_BEACON;
+
+	/*
+	 * Obtain 2 entries, one for the guardian byte,
+	 * the second for the actual beacon.
+	 */
+	guardian = rt2x00_get_data_entry(ring);
+	rt2x00_ring_index_inc(ring);
+	beacon = rt2x00_get_data_entry(ring);
+
+	/*
+	 * First we create the beacon.
+	 */
+	skb_push(skb, ring->desc_size);
+	rt2x00lib_write_tx_desc(rt2x00dev, beacon,
+		(struct data_desc*)skb->data,
+		(struct ieee80211_hdr*)(skb->data + ring->desc_size),
+		skb->len - ring->desc_size,
+		control);
+
+	/*
+	 * Length passed to usb_fill_urb cannot be an odd number,
+	 * so add 1 byte to make it even.
+	 */
+	length = skb->len;
+	if (length % 2)
+		length++;
+
+	usb_fill_bulk_urb(
+		beacon->priv,
+		usb_dev,
+		usb_sndbulkpipe(usb_dev, 1),
+		skb->data,
+		length,
+		rt2x00usb_beacondone,
+		beacon);
+
+	beacon->skb = skb;
+
+	/*
+	 * Second we need to create the guardian byte.
+	 * We only need a single byte, so lets recycle
+	 * the 'flags' field we are not using for beacons.
+	 */
+	guardian->flags = 0;
+	usb_fill_bulk_urb(
+		guardian->priv,
+		usb_dev,
+		usb_sndbulkpipe(usb_dev, 1),
+		&guardian->flags,
+		1,
+		rt2x00usb_beacondone,
+		guardian);
+
+	/*
+	 * Send out the guardian byte.
+	 */
+	usb_submit_urb(guardian->priv, GFP_ATOMIC);
+
+	/*
+	 * Enable beacon generation.
+	 */
+	rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, control->queue);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00usb_beacon_update);
+
+void rt2x00usb_beacondone(struct urb *urb)
+{
+	struct data_entry *entry = (struct data_entry*)urb->context;
+	struct data_ring *ring = entry->ring;
+
+	if (!test_bit(DEVICE_ENABLED_RADIO, &ring->rt2x00dev->flags))
+		return;
+
+	/*
+	 * Check if this was the guardian beacon,
+	 * if that was the case we need to send the real beacon now.
+	 * Otherwise we should free the sk_buffer, the device
+	 * should be doing the rest of the work now.
+	 */
+	if (ring->index == 1) {
+		rt2x00_ring_index_done_inc(ring);
+		entry = rt2x00_get_data_entry(ring);
+		usb_submit_urb(entry->priv, GFP_ATOMIC);
+		rt2x00_ring_index_inc(ring);
+	} else if (ring->index_done == 1) {
+		entry = rt2x00_get_data_entry_done(ring);
+		if (entry->skb) {
+			dev_kfree_skb(entry->skb);
+			entry->skb = NULL;
+		}
+		rt2x00_ring_index_done_inc(ring);
+	}
+}
+EXPORT_SYMBOL_GPL(rt2x00usb_beacondone);
+
+/*
+ * TX data handlers.
+ */
+static void rt2x00usb_interrupt_txdone(struct urb *urb)
+{
+	struct data_entry *entry = (struct data_entry*)urb->context;
+	struct data_ring *ring = entry->ring;
+	struct rt2x00_dev *rt2x00dev = ring->rt2x00dev;
+	struct data_desc *txd = (struct data_desc *)entry->skb->data;
+	u32 word;
+	int tx_status;
+
+	if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
+	    !__test_and_clear_bit(ENTRY_OWNER_NIC, &entry->flags))
+		return;
+
+	rt2x00_desc_read(txd, 0, &word);
+
+	/*
+	 * Remove the descriptor data from the buffer.
+	 */
+	skb_pull(entry->skb, ring->desc_size);
+
+	/*
+	 * Obtain the status about this packet.
+	 */
+	tx_status = !urb->status ? TX_SUCCESS : TX_FAIL_RETRY;
+
+	rt2x00lib_txdone(entry, tx_status, 0);
+
+	/*
+	 * Make this entry available for reuse.
+	 */
+	entry->flags = 0;
+	rt2x00_ring_index_done_inc(entry->ring);
+
+	/*
+	 * If the data ring was full before the txdone handler
+	 * we must make sure the packet queue in the mac80211 stack
+	 * is reenabled when the txdone handler has finished.
+	 */
+	if (!rt2x00_ring_full(ring))
+		ieee80211_wake_queue(rt2x00dev->hw,
+			entry->tx_status.control.queue);
+}
+
+int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
+	struct data_ring *ring, struct sk_buff *skb,
+	struct ieee80211_tx_control *control)
+{
+	struct usb_device *usb_dev =
+		interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
+	struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr*)skb->data;
+	struct data_entry *entry = rt2x00_get_data_entry(ring);
+	struct data_desc *txd;
+	u32 length = skb->len;
+
+	if (rt2x00_ring_full(ring)) {
+		ieee80211_stop_queue(rt2x00dev->hw, control->queue);
+		return -EINVAL;
+	}
+
+	if (test_bit(ENTRY_OWNER_NIC, &entry->flags)) {
+		ERROR(rt2x00dev,
+			"Arrived at non-free entry in the non-full queue %d.\n"
+			"Please file bug report to %s.\n",
+			control->queue, DRV_PROJECT);
+		ieee80211_stop_queue( rt2x00dev->hw, control->queue);
+		return -EINVAL;
+	}
+
+	skb_push(skb, rt2x00dev->hw->extra_tx_headroom);
+	txd = (struct data_desc*)skb->data;
+	rt2x00lib_write_tx_desc(rt2x00dev, entry, txd, ieee80211hdr,
+		length, control);
+	memcpy(&entry->tx_status.control, control, sizeof(*control));
+	entry->skb = skb;
+
+	/*
+	 * Length passed to usb_fill_urb cannot be an odd number,
+	 * so add 1 byte to make it even.
+	 */
+	length += rt2x00dev->hw->extra_tx_headroom;
+	if (length % 2)
+		length++;
+
+	__set_bit(ENTRY_OWNER_NIC, &entry->flags);
+	usb_fill_bulk_urb(
+		entry->priv,
+		usb_dev,
+		usb_sndbulkpipe(usb_dev, 1),
+		skb->data,
+		length,
+		rt2x00usb_interrupt_txdone,
+		entry);
+	usb_submit_urb(entry->priv, GFP_ATOMIC);
+
+	rt2x00_ring_index_inc(ring);
+
+	if (rt2x00_ring_full(ring))
+		ieee80211_stop_queue(rt2x00dev->hw, control->queue);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data);
+
+/*
+ * Device initialization handlers.
+ */
+static int rt2x00usb_alloc_ring(struct rt2x00_dev *rt2x00dev,
+	struct data_ring *ring)
+{
+	unsigned int i;
+
+	/*
+	 * Allocate the URB's
+	 */
+	for (i = 0; i < ring->stats.limit; i++) {
+		ring->entry[i].priv = usb_alloc_urb(0, GFP_KERNEL);
+		if (!ring->entry[i].priv)
+			return -ENOMEM;
+	}
+
+	return 0;
+}
+
+int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
+{
+	struct data_ring *ring;
+	struct sk_buff *skb;
+	unsigned int entry_size;
+	unsigned int i;
+	int status;
+
+	/*
+	 * Allocate DMA
+	 */
+	ring_for_each(rt2x00dev, ring) {
+		status = rt2x00usb_alloc_ring(rt2x00dev, ring);
+		if (status)
+			goto exit;
+	}
+
+	/*
+	 * For the RX ring, skb's should be allocated.
+	 */
+	entry_size = ring->data_size + ring->desc_size;
+	for (i = 0; i < rt2x00dev->rx->stats.limit; i++) {
+		skb = dev_alloc_skb(NET_IP_ALIGN + entry_size);
+		if (!skb)
+			goto exit;
+
+		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");