Merge ../linux-2.6

1 files changed, 0 insertions, 508 deletions

diff --git a/drivers/net/irda/sir_kthread.c b/drivers/net/irda/sir_kthread.c
deleted file mode 100644
index e3904d6bfecd..000000000000
--- a/drivers/net/irda/sir_kthread.c
+++ /dev/null
@@ -1,508 +0,0 @@
-/*********************************************************************
- *
- *	sir_kthread.c:		dedicated thread to process scheduled
- *				sir device setup requests
- *
- *	Copyright (c) 2002 Martin Diehl
- *
- *	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.
- *
- ********************************************************************/    
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/version.h>
-#include <linux/init.h>
-#include <linux/smp_lock.h>
-#include <linux/completion.h>
-#include <linux/delay.h>
-
-#include <net/irda/irda.h>
-
-#include "sir-dev.h"
-
-/**************************************************************************
- *
- * kIrDAd kernel thread and config state machine
- *
- */
-
-struct irda_request_queue {
-	struct list_head request_list;
-	spinlock_t lock;
-	task_t *thread;
-	struct completion exit;
-	wait_queue_head_t kick, done;
-	atomic_t num_pending;
-};
-
-static struct irda_request_queue irda_rq_queue;
-
-static int irda_queue_request(struct irda_request *rq)
-{
-	int ret = 0;
-	unsigned long flags;
-
-	if (!test_and_set_bit(0, &rq->pending)) {
-		spin_lock_irqsave(&irda_rq_queue.lock, flags);
-		list_add_tail(&rq->lh_request, &irda_rq_queue.request_list);
-		wake_up(&irda_rq_queue.kick);
-		atomic_inc(&irda_rq_queue.num_pending);
-		spin_unlock_irqrestore(&irda_rq_queue.lock, flags);
-		ret = 1;
-	}
-	return ret;
-}
-
-static void irda_request_timer(unsigned long data)
-{
-	struct irda_request *rq = (struct irda_request *)data;
-	unsigned long flags;
-	
-	spin_lock_irqsave(&irda_rq_queue.lock, flags);
-	list_add_tail(&rq->lh_request, &irda_rq_queue.request_list);
-	wake_up(&irda_rq_queue.kick);
-	spin_unlock_irqrestore(&irda_rq_queue.lock, flags);
-}
-
-static int irda_queue_delayed_request(struct irda_request *rq, unsigned long delay)
-{
-	int ret = 0;
-	struct timer_list *timer = &rq->timer;
-
-	if (!test_and_set_bit(0, &rq->pending)) {
-		timer->expires = jiffies + delay;
-		timer->function = irda_request_timer;
-		timer->data = (unsigned long)rq;
-		atomic_inc(&irda_rq_queue.num_pending);
-		add_timer(timer);
-		ret = 1;
-	}
-	return ret;
-}
-
-static void run_irda_queue(void)
-{
-	unsigned long flags;
-	struct list_head *entry, *tmp;
-	struct irda_request *rq;
-
-	spin_lock_irqsave(&irda_rq_queue.lock, flags);
-	list_for_each_safe(entry, tmp, &irda_rq_queue.request_list) {
-		rq = list_entry(entry, struct irda_request, lh_request);
-		list_del_init(entry);
-		spin_unlock_irqrestore(&irda_rq_queue.lock, flags);
-
-		clear_bit(0, &rq->pending);
-		rq->func(rq->data);
-
-		if (atomic_dec_and_test(&irda_rq_queue.num_pending))
-			wake_up(&irda_rq_queue.done);
-
-		spin_lock_irqsave(&irda_rq_queue.lock, flags);
-	}
-	spin_unlock_irqrestore(&irda_rq_queue.lock, flags);
-}		
-
-static int irda_thread(void *startup)
-{
-	DECLARE_WAITQUEUE(wait, current);
-
-	daemonize("kIrDAd");
-
-	irda_rq_queue.thread = current;
-
-	complete((struct completion *)startup);
-
-	while (irda_rq_queue.thread != NULL) {
-
-		/* We use TASK_INTERRUPTIBLE, rather than
-		 * TASK_UNINTERRUPTIBLE.  Andrew Morton made this
-		 * change ; he told me that it is safe, because "signal
-		 * blocking is now handled in daemonize()", he added
-		 * that the problem is that "uninterruptible sleep
-		 * contributes to load average", making user worry.
-		 * Jean II */
-		set_task_state(current, TASK_INTERRUPTIBLE);
-		add_wait_queue(&irda_rq_queue.kick, &wait);
-		if (list_empty(&irda_rq_queue.request_list))
-			schedule();
-		else
-			__set_task_state(current, TASK_RUNNING);
-		remove_wait_queue(&irda_rq_queue.kick, &wait);
-
-		/* make swsusp happy with our thread */
-		try_to_freeze();
-
-		run_irda_queue();
-	}
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,35)
-	reparent_to_init();
-#endif
-	complete_and_exit(&irda_rq_queue.exit, 0);
-	/* never reached */
-	return 0;
-}
-
-
-static void flush_irda_queue(void)
-{
-	if (atomic_read(&irda_rq_queue.num_pending)) {
-
-		DECLARE_WAITQUEUE(wait, current);
-
-		if (!list_empty(&irda_rq_queue.request_list))
-			run_irda_queue();
-
-		set_task_state(current, TASK_UNINTERRUPTIBLE);
-		add_wait_queue(&irda_rq_queue.done, &wait);
-		if (atomic_read(&irda_rq_queue.num_pending))
-			schedule();
-		else
-			__set_task_state(current, TASK_RUNNING);
-		remove_wait_queue(&irda_rq_queue.done, &wait);
-	}
-}
-
-/* substate handler of the config-fsm to handle the cases where we want
- * to wait for transmit completion before changing the port configuration
- */
-
-static int irda_tx_complete_fsm(struct sir_dev *dev)
-{
-	struct sir_fsm *fsm = &dev->fsm;
-	unsigned next_state, delay;
-	unsigned bytes_left;
-
-	do {
-		next_state = fsm->substate;	/* default: stay in current substate */
-		delay = 0;
-
-		switch(fsm->substate) {
-
-		case SIRDEV_STATE_WAIT_XMIT:
-			if (dev->drv->chars_in_buffer)
-				bytes_left = dev->drv->chars_in_buffer(dev);
-			else
-				bytes_left = 0;
-			if (!bytes_left) {
-				next_state = SIRDEV_STATE_WAIT_UNTIL_SENT;
-				break;
-			}
-
-			if (dev->speed > 115200)
-				delay = (bytes_left*8*10000) / (dev->speed/100);
-			else if (dev->speed > 0)
-				delay = (bytes_left*10*10000) / (dev->speed/100);
-			else
-				delay = 0;
-			/* expected delay (usec) until remaining bytes are sent */
-			if (delay < 100) {
-				udelay(delay);
-				delay = 0;
-				break;
-			}
-			/* sleep some longer delay (msec) */
-			delay = (delay+999) / 1000;
-			break;
-
-		case SIRDEV_STATE_WAIT_UNTIL_SENT:
-			/* block until underlaying hardware buffer are empty */
-			if (dev->drv->wait_until_sent)
-				dev->drv->wait_until_sent(dev);
-			next_state = SIRDEV_STATE_TX_DONE;
-			break;
-
-		case SIRDEV_STATE_TX_DONE:
-			return 0;
-
-		default:
-			IRDA_ERROR("%s - undefined state\n", __FUNCTION__);
-			return -EINVAL;
-		}
-		fsm->substate = next_state;
-	} while (delay == 0);
-	return delay;
-}
-
-/*
- * Function irda_config_fsm
- *
- * State machine to handle the configuration of the device (and attached dongle, if any).
- * This handler is scheduled for execution in kIrDAd context, so we can sleep.
- * however, kIrDAd is shared by all sir_dev devices so we better don't sleep there too
- * long. Instead, for longer delays we start a timer to reschedule us later.
- * On entry, fsm->sem is always locked and the netdev xmit queue stopped.
- * Both must be unlocked/restarted on completion - but only on final exit.
- */
-
-static void irda_config_fsm(void *data)
-{
-	struct sir_dev *dev = data;
-	struct sir_fsm *fsm = &dev->fsm;
-	int next_state;
-	int ret = -1;
-	unsigned delay;
-
-	IRDA_DEBUG(2, "%s(), <%ld>\n", __FUNCTION__, jiffies); 
-
-	do {
-		IRDA_DEBUG(3, "%s - state=0x%04x / substate=0x%04x\n",
-			__FUNCTION__, fsm->state, fsm->substate);
-
-		next_state = fsm->state;
-		delay = 0;
-
-		switch(fsm->state) {
-
-		case SIRDEV_STATE_DONGLE_OPEN:
-			if (dev->dongle_drv != NULL) {
-				ret = sirdev_put_dongle(dev);
-				if (ret) {
-					fsm->result = -EINVAL;
-					next_state = SIRDEV_STATE_ERROR;
-					break;
-				}
-			}
-
-			/* Initialize dongle */
-			ret = sirdev_get_dongle(dev, fsm->param);
-			if (ret) {
-				fsm->result = ret;
-				next_state = SIRDEV_STATE_ERROR;
-				break;
-			}
-
-			/* Dongles are powered through the modem control lines which
-			 * were just set during open. Before resetting, let's wait for
-			 * the power to stabilize. This is what some dongle drivers did
-			 * in open before, while others didn't - should be safe anyway.
-			 */
-
-			delay = 50;
-			fsm->substate = SIRDEV_STATE_DONGLE_RESET;
-			next_state = SIRDEV_STATE_DONGLE_RESET;
-
-			fsm->param = 9600;
-
-			break;
-
-		case SIRDEV_STATE_DONGLE_CLOSE:
-			/* shouldn't we just treat this as success=? */
-			if (dev->dongle_drv == NULL) {
-				fsm->result = -EINVAL;
-				next_state = SIRDEV_STATE_ERROR;
-				break;
-			}
-
-			ret = sirdev_put_dongle(dev);
-			if (ret) {
-				fsm->result = ret;
-				next_state = SIRDEV_STATE_ERROR;
-				break;
-			}
-			next_state = SIRDEV_STATE_DONE;
-			break;
-
-		case SIRDEV_STATE_SET_DTR_RTS:
-			ret = sirdev_set_dtr_rts(dev,
-				(fsm->param&0x02) ? TRUE : FALSE,
-				(fsm->param&0x01) ? TRUE : FALSE);
-			next_state = SIRDEV_STATE_DONE;
-			break;
-
-		case SIRDEV_STATE_SET_SPEED:
-			fsm->substate = SIRDEV_STATE_WAIT_XMIT;
-			next_state = SIRDEV_STATE_DONGLE_CHECK;
-			break;
-
-		case SIRDEV_STATE_DONGLE_CHECK:
-			ret = irda_tx_complete_fsm(dev);
-			if (ret < 0) {
-				fsm->result = ret;
-				next_state = SIRDEV_STATE_ERROR;
-				break;
-			}
-			if ((delay=ret) != 0)
-				break;
-
-			if (dev->dongle_drv) {
-				fsm->substate = SIRDEV_STATE_DONGLE_RESET;
-				next_state = SIRDEV_STATE_DONGLE_RESET;
-			}
-			else {
-				dev->speed = fsm->param;
-				next_state = SIRDEV_STATE_PORT_SPEED;
-			}
-			break;
-
-		case SIRDEV_STATE_DONGLE_RESET:
-			if (dev->dongle_drv->reset) {
-				ret = dev->dongle_drv->reset(dev);	
-				if (ret < 0) {
-					fsm->result = ret;
-					next_state = SIRDEV_STATE_ERROR;
-					break;
-				}
-			}
-			else
-				ret = 0;
-			if ((delay=ret) == 0) {
-				/* set serial port according to dongle default speed */
-				if (dev->drv->set_speed)
-					dev->drv->set_speed(dev, dev->speed);
-				fsm->substate = SIRDEV_STATE_DONGLE_SPEED;
-				next_state = SIRDEV_STATE_DONGLE_SPEED;
-			}
-			break;
-
-		case SIRDEV_STATE_DONGLE_SPEED:				
-			if (dev->dongle_drv->reset) {
-				ret = dev->dongle_drv->set_speed(dev, fsm->param);
-				if (ret < 0) {
-					fsm->result = ret;
-					next_state = SIRDEV_STATE_ERROR;
-					break;
-				}
-			}
-			else
-				ret = 0;
-			if ((delay=ret) == 0)
-				next_state = SIRDEV_STATE_PORT_SPEED;
-			break;
-
-		case SIRDEV_STATE_PORT_SPEED:
-			/* Finally we are ready to change the serial port speed */
-			if (dev->drv->set_speed)
-				dev->drv->set_speed(dev, dev->speed);
-			dev->new_speed = 0;
-			next_state = SIRDEV_STATE_DONE;
-			break;
-
-		case SIRDEV_STATE_DONE:
-			/* Signal network layer so it can send more frames */
-			netif_wake_queue(dev->netdev);
-			next_state = SIRDEV_STATE_COMPLETE;
-			break;
-
-		default:
-			IRDA_ERROR("%s - undefined state\n", __FUNCTION__);
-			fsm->result = -EINVAL;
-			/* fall thru */
-
-		case SIRDEV_STATE_ERROR:
-			IRDA_ERROR("%s - error: %d\n", __FUNCTION__, fsm->result);
-
-#if 0	/* don't enable this before we have netdev->tx_timeout to recover */
-			netif_stop_queue(dev->netdev);
-#else
-			netif_wake_queue(dev->netdev);
-#endif
-			/* fall thru */
-
-		case SIRDEV_STATE_COMPLETE:
-			/* config change finished, so we are not busy any longer */
-			sirdev_enable_rx(dev);
-			up(&fsm->sem);
-			return;
-		}
-		fsm->state = next_state;
-	} while(!delay);
-
-	irda_queue_delayed_request(&fsm->rq, msecs_to_jiffies(delay));
-}
-
-/* schedule some device configuration task for execution by kIrDAd
- * on behalf of the above state machine.
- * can be called from process or interrupt/tasklet context.
- */
-
-int sirdev_schedule_request(struct sir_dev *dev, int initial_state, unsigned param)
-{
-	struct sir_fsm *fsm = &dev->fsm;
-	int xmit_was_down;
-
-	IRDA_DEBUG(2, "%s - state=0x%04x / param=%u\n", __FUNCTION__, initial_state, param);
-
-	if (down_trylock(&fsm->sem)) {
-		if (in_interrupt()  ||  in_atomic()  ||  irqs_disabled()) {
-			IRDA_DEBUG(1, "%s(), state machine busy!\n", __FUNCTION__);
-			return -EWOULDBLOCK;
-		} else
-			down(&fsm->sem);
-	}
-
-	if (fsm->state == SIRDEV_STATE_DEAD) {
-		/* race with sirdev_close should never happen */
-		IRDA_ERROR("%s(), instance staled!\n", __FUNCTION__);
-		up(&fsm->sem);
-		return -ESTALE;		/* or better EPIPE? */
-	}
-
-	xmit_was_down = netif_queue_stopped(dev->netdev);
-	netif_stop_queue(dev->netdev);
-	atomic_set(&dev->enable_rx, 0);
-
-	fsm->state = initial_state;
-	fsm->param = param;
-	fsm->result = 0;
-
-	INIT_LIST_HEAD(&fsm->rq.lh_request);
-	fsm->rq.pending = 0;
-	fsm->rq.func = irda_config_fsm;
-	fsm->rq.data = dev;
-
-	if (!irda_queue_request(&fsm->rq)) {	/* returns 0 on error! */
-		atomic_set(&dev->enable_rx, 1);
-		if (!xmit_was_down)
-			netif_wake_queue(dev->netdev);		
-		up(&fsm->sem);
-		return -EAGAIN;
-	}
-	return 0;
-}
-
-static int __init irda_thread_create(void)
-{
-	struct completion startup;
-	int pid;
-
-	spin_lock_init(&irda_rq_queue.lock);
-	irda_rq_queue.thread = NULL;
-	INIT_LIST_HEAD(&irda_rq_queue.request_list);
-	init_waitqueue_head(&irda_rq_queue.kick);
-	init_waitqueue_head(&irda_rq_queue.done);
-	atomic_set(&irda_rq_queue.num_pending, 0);
-
-	init_completion(&startup);
-	pid = kernel_thread(irda_thread, &startup, CLONE_FS|CLONE_FILES);
-	if (pid <= 0)
-		return -EAGAIN;
-	else
-		wait_for_completion(&startup);
-
-	return 0;
-}
-
-static void __exit irda_thread_join(void)
-{
-	if (irda_rq_queue.thread) {
-		flush_irda_queue();
-		init_completion(&irda_rq_queue.exit);
-		irda_rq_queue.thread = NULL;
-		wake_up(&irda_rq_queue.kick);		
-		wait_for_completion(&irda_rq_queue.exit);
-	}
-}
-
-module_init(irda_thread_create);
-module_exit(irda_thread_join);
-
-MODULE_AUTHOR("Martin Diehl <info@mdiehl.de>");
-MODULE_DESCRIPTION("IrDA SIR core");
-MODULE_LICENSE("GPL");
-