1 files changed, 0 insertions, 273 deletions
diff --git a/drivers/staging/wimax/i2400m/usb-tx.c b/drivers/staging/wimax/i2400m/usb-tx.c
deleted file mode 100644
index 3ba9d70cca1b..000000000000
--- a/drivers/staging/wimax/i2400m/usb-tx.c
+++ /dev/null
@@ -1,273 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m
- * USB specific TX handling
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *   * Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- *   * Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in
- *     the documentation and/or other materials provided with the
- *     distribution.
- *   * Neither the name of Intel Corporation nor the names of its
- *     contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@intel.com>
- * Yanir Lubetkin <yanirx.lubetkin@intel.com>
- *  - Initial implementation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *  - Split transport/device specific
- *
- *
- * Takes the TX messages in the i2400m's driver TX FIFO and sends them
- * to the device until there are no more.
- *
- * If we fail sending the message, we just drop it. There isn't much
- * we can do at this point. We could also retry, but the USB stack has
- * already retried and still failed, so there is not much of a
- * point. As well, most of the traffic is network, which has recovery
- * methods for dropped packets.
- *
- * For sending we just obtain a FIFO buffer to send, send it to the
- * USB bulk out, tell the TX FIFO code we have sent it; query for
- * another one, etc... until done.
- *
- * We use a thread so we can call usb_autopm_enable() and
- * usb_autopm_disable() for each transaction; this way when the device
- * goes idle, it will suspend. It also has less overhead than a
- * dedicated workqueue, as it is being used for a single task.
- *
- * ROADMAP
- *
- * i2400mu_tx_setup()
- * i2400mu_tx_release()
- *
- * i2400mu_bus_tx_kick()	- Called by the tx.c code when there
- *                                is new data in the FIFO.
- * i2400mu_txd()
- *   i2400m_tx_msg_get()
- *   i2400m_tx_msg_sent()
- */
-#include "i2400m-usb.h"
-
-
-#define D_SUBMODULE tx
-#include "usb-debug-levels.h"
-
-
-/*
- * Get the next TX message in the TX FIFO and send it to the device
- *
- * Note that any iteration consumes a message to be sent, no matter if
- * it succeeds or fails (we have no real way to retry or complain).
- *
- * Return: 0 if ok, < 0 errno code on hard error.
- */
-static
-int i2400mu_tx(struct i2400mu *i2400mu, struct i2400m_msg_hdr *tx_msg,
-	       size_t tx_msg_size)
-{
-	int result = 0;
-	struct i2400m *i2400m = &i2400mu->i2400m;
-	struct device *dev = &i2400mu->usb_iface->dev;
-	int usb_pipe, sent_size, do_autopm;
-	struct usb_endpoint_descriptor *epd;
-
-	d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
-	do_autopm = atomic_read(&i2400mu->do_autopm);
-	result = do_autopm ?
-		usb_autopm_get_interface(i2400mu->usb_iface) : 0;
-	if (result < 0) {
-		dev_err(dev, "TX: can't get autopm: %d\n", result);
-		do_autopm = 0;
-	}
-	epd = usb_get_epd(i2400mu->usb_iface, i2400mu->endpoint_cfg.bulk_out);
-	usb_pipe = usb_sndbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress);
-retry:
-	result = usb_bulk_msg(i2400mu->usb_dev, usb_pipe,
-			      tx_msg, tx_msg_size, &sent_size, 200);
-	usb_mark_last_busy(i2400mu->usb_dev);
-	switch (result) {
-	case 0:
-		if (sent_size != tx_msg_size) {	/* Too short? drop it */
-			dev_err(dev, "TX: short write (%d B vs %zu "
-				"expected)\n", sent_size, tx_msg_size);
-			result = -EIO;
-		}
-		break;
-	case -EPIPE:
-		/*
-		 * Stall -- maybe the device is choking with our
-		 * requests. Clear it and give it some time. If they
-		 * happen to often, it might be another symptom, so we
-		 * reset.
-		 *
-		 * No error handling for usb_clear_halt(0; if it
-		 * works, the retry works; if it fails, this switch
-		 * does the error handling for us.
-		 */
-		if (edc_inc(&i2400mu->urb_edc,
-			    10 * EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
-			dev_err(dev, "BM-CMD: too many stalls in "
-				"URB; resetting device\n");
-			usb_queue_reset_device(i2400mu->usb_iface);
-		} else {
-			usb_clear_halt(i2400mu->usb_dev, usb_pipe);
-			msleep(10);	/* give the device some time */
-			goto retry;
-		}
-		fallthrough;
-	case -EINVAL:			/* while removing driver */
-	case -ENODEV:			/* dev disconnect ... */
-	case -ENOENT:			/* just ignore it */
-	case -ESHUTDOWN:		/* and exit */
-	case -ECONNRESET:
-		result = -ESHUTDOWN;
-		break;
-	default:			/* Some error? */
-		if (edc_inc(&i2400mu->urb_edc,
-			    EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
-			dev_err(dev, "TX: maximum errors in URB "
-				"exceeded; resetting device\n");
-			usb_queue_reset_device(i2400mu->usb_iface);
-		} else {
-			dev_err(dev, "TX: cannot send URB; retrying. "
-				"tx_msg @%zu %zu B [%d sent]: %d\n",
-				(void *) tx_msg - i2400m->tx_buf,
-				tx_msg_size, sent_size, result);
-			goto retry;
-		}
-	}
-	if (do_autopm)
-		usb_autopm_put_interface(i2400mu->usb_iface);
-	d_fnend(4, dev, "(i2400mu %p) = result\n", i2400mu);
-	return result;
-}
-
-
-/*
- * Get the next TX message in the TX FIFO and send it to the device
- *
- * Note we exit the loop if i2400mu_tx() fails; that function only
- * fails on hard error (failing to tx a buffer not being one of them,
- * see its doc).
- *
- * Return: 0
- */
-static
-int i2400mu_txd(void *_i2400mu)
-{
-	struct i2400mu *i2400mu = _i2400mu;
-	struct i2400m *i2400m = &i2400mu->i2400m;
-	struct device *dev = &i2400mu->usb_iface->dev;
-	struct i2400m_msg_hdr *tx_msg;
-	size_t tx_msg_size;
-	unsigned long flags;
-
-	d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
-
-	spin_lock_irqsave(&i2400m->tx_lock, flags);
-	BUG_ON(i2400mu->tx_kthread != NULL);
-	i2400mu->tx_kthread = current;
-	spin_unlock_irqrestore(&i2400m->tx_lock, flags);
-
-	while (1) {
-		d_printf(2, dev, "TX: waiting for messages\n");
-		tx_msg = NULL;
-		wait_event_interruptible(
-			i2400mu->tx_wq,
-			(kthread_should_stop()	/* check this first! */
-			 || (tx_msg = i2400m_tx_msg_get(i2400m, &tx_msg_size)))
-			);
-		if (kthread_should_stop())
-			break;
-		WARN_ON(tx_msg == NULL);	/* should not happen...*/
-		d_printf(2, dev, "TX: submitting %zu bytes\n", tx_msg_size);
-		d_dump(5, dev, tx_msg, tx_msg_size);
-		/* Yeah, we ignore errors ... not much we can do */
-		i2400mu_tx(i2400mu, tx_msg, tx_msg_size);
-		i2400m_tx_msg_sent(i2400m);	/* ack it, advance the FIFO */
-	}
-
-	spin_lock_irqsave(&i2400m->tx_lock, flags);
-	i2400mu->tx_kthread = NULL;
-	spin_unlock_irqrestore(&i2400m->tx_lock, flags);
-
-	d_fnend(4, dev, "(i2400mu %p)\n", i2400mu);
-	return 0;
-}
-
-
-/*
- * i2400m TX engine notifies us that there is data in the FIFO ready
- * for TX
- *
- * If there is a URB in flight, don't do anything; when it finishes,
- * it will see there is data in the FIFO and send it. Else, just
- * submit a write.
- */
-void i2400mu_bus_tx_kick(struct i2400m *i2400m)
-{
-	struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
-	struct device *dev = &i2400mu->usb_iface->dev;
-
-	d_fnstart(3, dev, "(i2400m %p) = void\n", i2400m);
-	wake_up_all(&i2400mu->tx_wq);
-	d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
-}
-
-
-int i2400mu_tx_setup(struct i2400mu *i2400mu)
-{
-	int result = 0;
-	struct i2400m *i2400m = &i2400mu->i2400m;
-	struct device *dev = &i2400mu->usb_iface->dev;
-	struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
-	struct task_struct *kthread;
-
-	kthread = kthread_run(i2400mu_txd, i2400mu, "%s-tx",
-			      wimax_dev->name);
-	/* the kthread function sets i2400mu->tx_thread */
-	if (IS_ERR(kthread)) {
-		result = PTR_ERR(kthread);
-		dev_err(dev, "TX: cannot start thread: %d\n", result);
-	}
-	return result;
-}
-
-void i2400mu_tx_release(struct i2400mu *i2400mu)
-{
-	unsigned long flags;
-	struct i2400m *i2400m = &i2400mu->i2400m;
-	struct device *dev = i2400m_dev(i2400m);
-	struct task_struct *kthread;
-
-	spin_lock_irqsave(&i2400m->tx_lock, flags);
-	kthread = i2400mu->tx_kthread;
-	i2400mu->tx_kthread = NULL;
-	spin_unlock_irqrestore(&i2400m->tx_lock, flags);
-	if (kthread)
-		kthread_stop(kthread);
-	else
-		d_printf(1, dev, "TX: kthread had already exited\n");
-}