1 files changed, 139 insertions, 67 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c
index 1a9937d5aff..86c43d112a4 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.c
@@ -14,9 +14,7 @@
 	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.
+	along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
 /*
@@ -70,9 +68,15 @@ int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev,
 		}
 	}
 
-	ERROR(rt2x00dev,
-	      "Vendor Request 0x%02x failed for offset 0x%04x with error %d.\n",
-	      request, offset, status);
+	/* If the port is powered down, we get a -EPROTO error, and this
+	 * leads to a endless loop. So just say that the device is gone.
+	 */
+	if (status == -EPROTO)
+		clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
+
+	rt2x00_err(rt2x00dev,
+		   "Vendor Request 0x%02x failed for offset 0x%04x with error %d\n",
+		   request, offset, status);
 
 	return status;
 }
@@ -91,7 +95,7 @@ int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev,
 	 * Check for Cache availability.
 	 */
 	if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) {
-		ERROR(rt2x00dev, "CSR cache not available.\n");
+		rt2x00_err(rt2x00dev, "CSR cache not available\n");
 		return -ENOMEM;
 	}
 
@@ -157,14 +161,67 @@ int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev,
 		udelay(REGISTER_BUSY_DELAY);
 	}
 
-	ERROR(rt2x00dev, "Indirect register access failed: "
-	      "offset=0x%.08x, value=0x%.08x\n", offset, *reg);
+	rt2x00_err(rt2x00dev, "Indirect register access failed: offset=0x%.08x, value=0x%.08x\n",
+		   offset, *reg);
 	*reg = ~0;
 
 	return 0;
 }
 EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read);
 
+
+struct rt2x00_async_read_data {
+	__le32 reg;
+	struct usb_ctrlrequest cr;
+	struct rt2x00_dev *rt2x00dev;
+	bool (*callback)(struct rt2x00_dev *, int, u32);
+};
+
+static void rt2x00usb_register_read_async_cb(struct urb *urb)
+{
+	struct rt2x00_async_read_data *rd = urb->context;
+	if (rd->callback(rd->rt2x00dev, urb->status, le32_to_cpu(rd->reg))) {
+		if (usb_submit_urb(urb, GFP_ATOMIC) < 0)
+			kfree(rd);
+	} else
+		kfree(rd);
+}
+
+void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev,
+				   const unsigned int offset,
+				   bool (*callback)(struct rt2x00_dev*, int, u32))
+{
+	struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
+	struct urb *urb;
+	struct rt2x00_async_read_data *rd;
+
+	rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
+	if (!rd)
+		return;
+
+	urb = usb_alloc_urb(0, GFP_ATOMIC);
+	if (!urb) {
+		kfree(rd);
+		return;
+	}
+
+	rd->rt2x00dev = rt2x00dev;
+	rd->callback = callback;
+	rd->cr.bRequestType = USB_VENDOR_REQUEST_IN;
+	rd->cr.bRequest = USB_MULTI_READ;
+	rd->cr.wValue = 0;
+	rd->cr.wIndex = cpu_to_le16(offset);
+	rd->cr.wLength = cpu_to_le16(sizeof(u32));
+
+	usb_fill_control_urb(urb, usb_dev, usb_rcvctrlpipe(usb_dev, 0),
+			     (unsigned char *)(&rd->cr), &rd->reg, sizeof(rd->reg),
+			     rt2x00usb_register_read_async_cb, rd);
+	if (usb_submit_urb(urb, GFP_ATOMIC) < 0)
+		kfree(rd);
+	usb_free_urb(urb);
+}
+EXPORT_SYMBOL_GPL(rt2x00usb_register_read_async);
+
 /*
  * TX data handlers.
  */
@@ -173,7 +230,7 @@ static void rt2x00usb_work_txdone_entry(struct queue_entry *entry)
 	/*
 	 * If the transfer to hardware succeeded, it does not mean the
 	 * frame was send out correctly. It only means the frame
-	 * was succesfully pushed to the hardware, we have no
+	 * was successfully pushed to the hardware, we have no
 	 * way to determine the transmission status right now.
 	 * (Only indirectly by looking at the failed TX counters
 	 * in the register).
@@ -209,28 +266,30 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb)
 	struct queue_entry *entry = (struct queue_entry *)urb->context;
 	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 
-	if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
+	if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
 		return;
-
-	/*
-	 * Report the frame as DMA done
-	 */
-	rt2x00lib_dmadone(entry);
-
 	/*
 	 * Check if the frame was correctly uploaded
 	 */
 	if (urb->status)
 		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
+	/*
+	 * Report the frame as DMA done
+	 */
+	rt2x00lib_dmadone(entry);
 
+	if (rt2x00dev->ops->lib->tx_dma_done)
+		rt2x00dev->ops->lib->tx_dma_done(entry);
 	/*
 	 * Schedule the delayed work for reading the TX status
 	 * from the device.
 	 */
-	ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->txdone_work);
+	if (!test_bit(REQUIRE_TXSTATUS_FIFO, &rt2x00dev->cap_flags) ||
+	    !kfifo_is_empty(&rt2x00dev->txstatus_fifo))
+		queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work);
 }
 
-static void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
+static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry, void *data)
 {
 	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 	struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
@@ -240,15 +299,25 @@ static void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
 
 	if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) ||
 	    test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
-		return;
+		return false;
 
 	/*
-	 * USB devices cannot blindly pass the skb->len as the
-	 * length of the data to usb_fill_bulk_urb. Pass the skb
-	 * to the driver to determine what the length should be.
+	 * USB devices require certain padding at the end of each frame
+	 * and urb. Those paddings are not included in skbs. Pass entry
+	 * to the driver to determine what the overall length should be.
 	 */
 	length = rt2x00dev->ops->lib->get_tx_data_len(entry);
 
+	status = skb_padto(entry->skb, length);
+	if (unlikely(status)) {
+		/* TODO: report something more appropriate than IO_FAILED. */
+		rt2x00_warn(rt2x00dev, "TX SKB padding error, out of memory\n");
+		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
+		rt2x00lib_dmadone(entry);
+
+		return false;
+	}
+
 	usb_fill_bulk_urb(entry_priv->urb, usb_dev,
 			  usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint),
 			  entry->skb->data, length,
@@ -261,6 +330,8 @@ static void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
 		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
 		rt2x00lib_dmadone(entry);
 	}
+
+	return false;
 }
 
 /*
@@ -291,7 +362,7 @@ static void rt2x00usb_work_rxdone(struct work_struct *work)
 		/*
 		 * Send the frame to rt2x00lib for further processing.
 		 */
-		rt2x00lib_rxdone(entry);
+		rt2x00lib_rxdone(entry, GFP_KERNEL);
 	}
 }
 
@@ -320,10 +391,10 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb)
 	 * Schedule the delayed work for reading the RX status
 	 * from the device.
 	 */
-	ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->rxdone_work);
+	queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work);
 }
 
-static void rt2x00usb_kick_rx_entry(struct queue_entry *entry)
+static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry, void *data)
 {
 	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 	struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
@@ -332,7 +403,7 @@ static void rt2x00usb_kick_rx_entry(struct queue_entry *entry)
 
 	if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
 	    test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
-		return;
+		return false;
 
 	rt2x00lib_dmastart(entry);
 
@@ -348,6 +419,8 @@ static void rt2x00usb_kick_rx_entry(struct queue_entry *entry)
 		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
 		rt2x00lib_dmadone(entry);
 	}
+
+	return false;
 }
 
 void rt2x00usb_kick_queue(struct data_queue *queue)
@@ -358,12 +431,18 @@ void rt2x00usb_kick_queue(struct data_queue *queue)
 	case QID_AC_BE:
 	case QID_AC_BK:
 		if (!rt2x00queue_empty(queue))
-			rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX,
+			rt2x00queue_for_each_entry(queue,
+						   Q_INDEX_DONE,
+						   Q_INDEX,
+						   NULL,
 						   rt2x00usb_kick_tx_entry);
 		break;
 	case QID_RX:
 		if (!rt2x00queue_full(queue))
-			rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX,
+			rt2x00queue_for_each_entry(queue,
+						   Q_INDEX,
+						   Q_INDEX_DONE,
+						   NULL,
 						   rt2x00usb_kick_rx_entry);
 		break;
 	default:
@@ -372,14 +451,14 @@ void rt2x00usb_kick_queue(struct data_queue *queue)
 }
 EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue);
 
-static void rt2x00usb_flush_entry(struct queue_entry *entry)
+static bool rt2x00usb_flush_entry(struct queue_entry *entry, void *data)
 {
 	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 	struct queue_entry_priv_usb *entry_priv = entry->priv_data;
 	struct queue_entry_priv_usb_bcn *bcn_priv = entry->priv_data;
 
 	if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
-		return;
+		return false;
 
 	usb_kill_urb(entry_priv->urb);
 
@@ -387,17 +466,20 @@ static void rt2x00usb_flush_entry(struct queue_entry *entry)
 	 * Kill guardian urb (if required by driver).
 	 */
 	if ((entry->queue->qid == QID_BEACON) &&
-	    (test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)))
+	    (test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags)))
 		usb_kill_urb(bcn_priv->guardian_urb);
+
+	return false;
 }
 
-void rt2x00usb_flush_queue(struct data_queue *queue)
+void rt2x00usb_flush_queue(struct data_queue *queue, bool drop)
 {
 	struct work_struct *completion;
 	unsigned int i;
 
-	rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX,
-				   rt2x00usb_flush_entry);
+	if (drop)
+		rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, NULL,
+					   rt2x00usb_flush_entry);
 
 	/*
 	 * Obtain the queue completion handler
@@ -416,7 +498,7 @@ void rt2x00usb_flush_queue(struct data_queue *queue)
 		return;
 	}
 
-	for (i = 0; i < 20; i++) {
+	for (i = 0; i < 10; i++) {
 		/*
 		 * Check if the driver is already done, otherwise we
 		 * have to sleep a little while to give the driver/hw
@@ -429,7 +511,7 @@ void rt2x00usb_flush_queue(struct data_queue *queue)
 		 * Schedule the completion handler manually, when this
 		 * worker function runs, it should cleanup the queue.
 		 */
-		ieee80211_queue_work(queue->rt2x00dev->hw, completion);
+		queue_work(queue->rt2x00dev->workqueue, completion);
 
 		/*
 		 * Wait for a little while to give the driver
@@ -442,18 +524,20 @@ EXPORT_SYMBOL_GPL(rt2x00usb_flush_queue);
 
 static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue)
 {
-	WARNING(queue->rt2x00dev, "TX queue %d DMA timed out,"
-		" invoke forced forced reset\n", queue->qid);
+	rt2x00_warn(queue->rt2x00dev, "TX queue %d DMA timed out, invoke forced forced reset\n",
+		    queue->qid);
 
+	rt2x00queue_stop_queue(queue);
 	rt2x00queue_flush_queue(queue, true);
+	rt2x00queue_start_queue(queue);
 }
 
-static void rt2x00usb_watchdog_tx_status(struct data_queue *queue)
+static int rt2x00usb_dma_timeout(struct data_queue *queue)
 {
-	WARNING(queue->rt2x00dev, "TX queue %d status timed out,"
-		" invoke forced tx handler\n", queue->qid);
+	struct queue_entry *entry;
 
-	ieee80211_queue_work(queue->rt2x00dev->hw, &queue->rt2x00dev->txdone_work);
+	entry = rt2x00queue_get_entry(queue, Q_INDEX_DMA_DONE);
+	return rt2x00queue_dma_timeout(entry);
 }
 
 void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev)
@@ -462,10 +546,8 @@ void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev)
 
 	tx_queue_for_each(rt2x00dev, queue) {
 		if (!rt2x00queue_empty(queue)) {
-			if (rt2x00queue_dma_timeout(queue))
+			if (rt2x00usb_dma_timeout(queue))
 				rt2x00usb_watchdog_tx_dma(queue);
-			if (rt2x00queue_status_timeout(queue))
-				rt2x00usb_watchdog_tx_status(queue);
 		}
 	}
 }
@@ -489,7 +571,7 @@ void rt2x00usb_clear_entry(struct queue_entry *entry)
 	entry->flags = 0;
 
 	if (entry->queue->qid == QID_RX)
-		rt2x00usb_kick_rx_entry(entry);
+		rt2x00usb_kick_rx_entry(entry, NULL);
 }
 EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry);
 
@@ -546,7 +628,7 @@ static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev)
 	 * At least 1 endpoint for RX and 1 endpoint for TX must be available.
 	 */
 	if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) {
-		ERROR(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n");
+		rt2x00_err(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n");
 		return -EPIPE;
 	}
 
@@ -583,7 +665,7 @@ static int rt2x00usb_alloc_entries(struct data_queue *queue)
 	 * then we are done.
 	 */
 	if (queue->qid != QID_BEACON ||
-	    !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
+	    !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags))
 		return 0;
 
 	for (i = 0; i < queue->limit; i++) {
@@ -618,7 +700,7 @@ static void rt2x00usb_free_entries(struct data_queue *queue)
 	 * then we are done.
 	 */
 	if (queue->qid != QID_BEACON ||
-	    !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
+	    !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags))
 		return;
 
 	for (i = 0; i < queue->limit; i++) {
@@ -699,7 +781,7 @@ static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev)
 	return 0;
 
 exit:
-	ERROR_PROBE("Failed to allocate registers.\n");
+	rt2x00_probe_err("Failed to allocate registers\n");
 
 	rt2x00usb_free_reg(rt2x00dev);
 
@@ -707,19 +789,19 @@ exit:
 }
 
 int rt2x00usb_probe(struct usb_interface *usb_intf,
-		    const struct usb_device_id *id)
+		    const struct rt2x00_ops *ops)
 {
 	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);
+	usb_reset_device(usb_dev);
 
 	hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
 	if (!hw) {
-		ERROR_PROBE("Failed to allocate hardware.\n");
+		rt2x00_probe_err("Failed to allocate hardware\n");
 		retval = -ENOMEM;
 		goto exit_put_device;
 	}
@@ -735,6 +817,8 @@ int rt2x00usb_probe(struct usb_interface *usb_intf,
 
 	INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone);
 	INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone);
+	hrtimer_init(&rt2x00dev->txstatus_timer, CLOCK_MONOTONIC,
+		     HRTIMER_MODE_REL);
 
 	retval = rt2x00usb_alloc_reg(rt2x00dev);
 	if (retval)
@@ -786,18 +870,8 @@ 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;
+	return rt2x00lib_suspend(rt2x00dev, state);
 }
 EXPORT_SYMBOL_GPL(rt2x00usb_suspend);
 
@@ -806,8 +880,6 @@ 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);