1 files changed, 0 insertions, 597 deletions
diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c
deleted file mode 100644
index 40424edae93..00000000000
--- a/arch/arm/plat-omap/mailbox.c
+++ /dev/null
@@ -1,597 +0,0 @@
-/*
- * OMAP mailbox driver
- *
- * Copyright (C) 2006-2009 Nokia Corporation. All rights reserved.
- *
- * Contact: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * 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., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- */
-
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/device.h>
-#include <linux/delay.h>
-
-#include <mach/mailbox.h>
-
-static int enable_seq_bit;
-module_param(enable_seq_bit, bool, 0);
-MODULE_PARM_DESC(enable_seq_bit, "Enable sequence bit checking.");
-
-static struct omap_mbox *mboxes;
-static DEFINE_RWLOCK(mboxes_lock);
-
-/*
- * Mailbox sequence bit API
- */
-
-/* seq_rcv should be initialized with any value other than
- * 0 and 1 << 31, to allow either value for the first
- * message.  */
-static inline void mbox_seq_init(struct omap_mbox *mbox)
-{
-	if (!enable_seq_bit)
-		return;
-
-	/* any value other than 0 and 1 << 31 */
-	mbox->seq_rcv = 0xffffffff;
-}
-
-static inline void mbox_seq_toggle(struct omap_mbox *mbox, mbox_msg_t * msg)
-{
-	if (!enable_seq_bit)
-		return;
-
-	/* add seq_snd to msg */
-	*msg = (*msg & 0x7fffffff) | mbox->seq_snd;
-	/* flip seq_snd */
-	mbox->seq_snd ^= 1 << 31;
-}
-
-static inline int mbox_seq_test(struct omap_mbox *mbox, mbox_msg_t msg)
-{
-	mbox_msg_t seq;
-
-	if (!enable_seq_bit)
-		return 0;
-
-	seq = msg & (1 << 31);
-	if (seq == mbox->seq_rcv)
-		return -1;
-	mbox->seq_rcv = seq;
-	return 0;
-}
-
-/* Mailbox FIFO handle functions */
-static inline mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox)
-{
-	return mbox->ops->fifo_read(mbox);
-}
-static inline void mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg)
-{
-	mbox->ops->fifo_write(mbox, msg);
-}
-static inline int mbox_fifo_empty(struct omap_mbox *mbox)
-{
-	return mbox->ops->fifo_empty(mbox);
-}
-static inline int mbox_fifo_full(struct omap_mbox *mbox)
-{
-	return mbox->ops->fifo_full(mbox);
-}
-
-/* Mailbox IRQ handle functions */
-static inline void enable_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
-{
-	mbox->ops->enable_irq(mbox, irq);
-}
-static inline void disable_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
-{
-	mbox->ops->disable_irq(mbox, irq);
-}
-static inline void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
-{
-	if (mbox->ops->ack_irq)
-		mbox->ops->ack_irq(mbox, irq);
-}
-static inline int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
-{
-	return mbox->ops->is_irq(mbox, irq);
-}
-
-/* Mailbox Sequence Bit function */
-void omap_mbox_init_seq(struct omap_mbox *mbox)
-{
-	mbox_seq_init(mbox);
-}
-EXPORT_SYMBOL(omap_mbox_init_seq);
-
-/*
- * message sender
- */
-static int __mbox_msg_send(struct omap_mbox *mbox, mbox_msg_t msg, void *arg)
-{
-	int ret = 0, i = 1000;
-
-	while (mbox_fifo_full(mbox)) {
-		if (mbox->ops->type == OMAP_MBOX_TYPE2)
-			return -1;
-		if (--i == 0)
-			return -1;
-		udelay(1);
-	}
-
-	if (arg && mbox->txq->callback) {
-		ret = mbox->txq->callback(arg);
-		if (ret)
-			goto out;
-	}
-
-	mbox_seq_toggle(mbox, &msg);
-	mbox_fifo_write(mbox, msg);
- out:
-	return ret;
-}
-
-struct omap_msg_tx_data {
-	mbox_msg_t	msg;
-	void		*arg;
-};
-
-static void omap_msg_tx_end_io(struct request *rq, int error)
-{
-	kfree(rq->special);
-	__blk_put_request(rq->q, rq);
-}
-
-int omap_mbox_msg_send(struct omap_mbox *mbox, mbox_msg_t msg, void* arg)
-{
-	struct omap_msg_tx_data *tx_data;
-	struct request *rq;
-	struct request_queue *q = mbox->txq->queue;
-
-	tx_data = kmalloc(sizeof(*tx_data), GFP_ATOMIC);
-	if (unlikely(!tx_data))
-		return -ENOMEM;
-
-	rq = blk_get_request(q, WRITE, GFP_ATOMIC);
-	if (unlikely(!rq)) {
-		kfree(tx_data);
-		return -ENOMEM;
-	}
-
-	tx_data->msg = msg;
-	tx_data->arg = arg;
-	rq->end_io = omap_msg_tx_end_io;
-	blk_insert_request(q, rq, 0, tx_data);
-
-	schedule_work(&mbox->txq->work);
-	return 0;
-}
-EXPORT_SYMBOL(omap_mbox_msg_send);
-
-static void mbox_tx_work(struct work_struct *work)
-{
-	int ret;
-	struct request *rq;
-	struct omap_mbox_queue *mq = container_of(work,
-				struct omap_mbox_queue, work);
-	struct omap_mbox *mbox = mq->queue->queuedata;
-	struct request_queue *q = mbox->txq->queue;
-
-	while (1) {
-		struct omap_msg_tx_data *tx_data;
-
-		spin_lock(q->queue_lock);
-		rq = blk_fetch_request(q);
-		spin_unlock(q->queue_lock);
-
-		if (!rq)
-			break;
-
-		tx_data = rq->special;
-
-		ret = __mbox_msg_send(mbox, tx_data->msg, tx_data->arg);
-		if (ret) {
-			enable_mbox_irq(mbox, IRQ_TX);
-			spin_lock(q->queue_lock);
-			blk_requeue_request(q, rq);
-			spin_unlock(q->queue_lock);
-			return;
-		}
-
-		spin_lock(q->queue_lock);
-		__blk_end_request_all(rq, 0);
-		spin_unlock(q->queue_lock);
-	}
-}
-
-/*
- * Message receiver(workqueue)
- */
-static void mbox_rx_work(struct work_struct *work)
-{
-	struct omap_mbox_queue *mq =
-			container_of(work, struct omap_mbox_queue, work);
-	struct omap_mbox *mbox = mq->queue->queuedata;
-	struct request_queue *q = mbox->rxq->queue;
-	struct request *rq;
-	mbox_msg_t msg;
-	unsigned long flags;
-
-	if (mbox->rxq->callback == NULL) {
-		sysfs_notify(&mbox->dev->kobj, NULL, "mbox");
-		return;
-	}
-
-	while (1) {
-		spin_lock_irqsave(q->queue_lock, flags);
-		rq = blk_fetch_request(q);
-		spin_unlock_irqrestore(q->queue_lock, flags);
-		if (!rq)
-			break;
-
-		msg = (mbox_msg_t)rq->special;
-		blk_end_request_all(rq, 0);
-		mbox->rxq->callback((void *)msg);
-	}
-}
-
-/*
- * Mailbox interrupt handler
- */
-static void mbox_txq_fn(struct request_queue * q)
-{
-}
-
-static void mbox_rxq_fn(struct request_queue * q)
-{
-}
-
-static void __mbox_tx_interrupt(struct omap_mbox *mbox)
-{
-	disable_mbox_irq(mbox, IRQ_TX);
-	ack_mbox_irq(mbox, IRQ_TX);
-	schedule_work(&mbox->txq->work);
-}
-
-static void __mbox_rx_interrupt(struct omap_mbox *mbox)
-{
-	struct request *rq;
-	mbox_msg_t msg;
-	struct request_queue *q = mbox->rxq->queue;
-
-	disable_mbox_irq(mbox, IRQ_RX);
-
-	while (!mbox_fifo_empty(mbox)) {
-		rq = blk_get_request(q, WRITE, GFP_ATOMIC);
-		if (unlikely(!rq))
-			goto nomem;
-
-		msg = mbox_fifo_read(mbox);
-
-		if (unlikely(mbox_seq_test(mbox, msg))) {
-			pr_info("mbox: Illegal seq bit!(%08x)\n", msg);
-			if (mbox->err_notify)
-				mbox->err_notify();
-		}
-
-		blk_insert_request(q, rq, 0, (void *)msg);
-		if (mbox->ops->type == OMAP_MBOX_TYPE1)
-			break;
-	}
-
-	/* no more messages in the fifo. clear IRQ source. */
-	ack_mbox_irq(mbox, IRQ_RX);
-	enable_mbox_irq(mbox, IRQ_RX);
-nomem:
-	schedule_work(&mbox->rxq->work);
-}
-
-static irqreturn_t mbox_interrupt(int irq, void *p)
-{
-	struct omap_mbox *mbox = p;
-
-	if (is_mbox_irq(mbox, IRQ_TX))
-		__mbox_tx_interrupt(mbox);
-
-	if (is_mbox_irq(mbox, IRQ_RX))
-		__mbox_rx_interrupt(mbox);
-
-	return IRQ_HANDLED;
-}
-
-/*
- * sysfs files
- */
-static ssize_t
-omap_mbox_write(struct device *dev, struct device_attribute *attr,
-		const char * buf, size_t count)
-{
-	int ret;
-	mbox_msg_t *p = (mbox_msg_t *)buf;
-	struct omap_mbox *mbox = dev_get_drvdata(dev);
-
-	for (; count >= sizeof(mbox_msg_t); count -= sizeof(mbox_msg_t)) {
-		ret = omap_mbox_msg_send(mbox, be32_to_cpu(*p), NULL);
-		if (ret)
-			return -EAGAIN;
-		p++;
-	}
-
-	return (size_t)((char *)p - buf);
-}
-
-static ssize_t
-omap_mbox_read(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	unsigned long flags;
-	struct request *rq;
-	mbox_msg_t *p = (mbox_msg_t *) buf;
-	struct omap_mbox *mbox = dev_get_drvdata(dev);
-	struct request_queue *q = mbox->rxq->queue;
-
-	while (1) {
-		spin_lock_irqsave(q->queue_lock, flags);
-		rq = blk_fetch_request(q);
-		spin_unlock_irqrestore(q->queue_lock, flags);
-
-		if (!rq)
-			break;
-
-		*p = (mbox_msg_t)rq->special;
-
-		blk_end_request_all(rq, 0);
-
-		if (unlikely(mbox_seq_test(mbox, *p))) {
-			pr_info("mbox: Illegal seq bit!(%08x) ignored\n", *p);
-			continue;
-		}
-		p++;
-	}
-
-	pr_debug("%02x %02x %02x %02x\n", buf[0], buf[1], buf[2], buf[3]);
-
-	return (size_t) ((char *)p - buf);
-}
-
-static DEVICE_ATTR(mbox, S_IRUGO | S_IWUSR, omap_mbox_read, omap_mbox_write);
-
-static ssize_t mbox_show(struct class *class, char *buf)
-{
-	return sprintf(buf, "mbox");
-}
-
-static CLASS_ATTR(mbox, S_IRUGO, mbox_show, NULL);
-
-static struct class omap_mbox_class = {
-	.name = "omap-mailbox",
-};
-
-static struct omap_mbox_queue *mbox_queue_alloc(struct omap_mbox *mbox,
-					request_fn_proc * proc,
-					void (*work) (struct work_struct *))
-{
-	struct request_queue *q;
-	struct omap_mbox_queue *mq;
-
-	mq = kzalloc(sizeof(struct omap_mbox_queue), GFP_KERNEL);
-	if (!mq)
-		return NULL;
-
-	spin_lock_init(&mq->lock);
-
-	q = blk_init_queue(proc, &mq->lock);
-	if (!q)
-		goto error;
-	q->queuedata = mbox;
-	mq->queue = q;
-
-	INIT_WORK(&mq->work, work);
-
-	return mq;
-error:
-	kfree(mq);
-	return NULL;
-}
-
-static void mbox_queue_free(struct omap_mbox_queue *q)
-{
-	blk_cleanup_queue(q->queue);
-	kfree(q);
-}
-
-static int omap_mbox_init(struct omap_mbox *mbox)
-{
-	int ret;
-	struct omap_mbox_queue *mq;
-
-	if (likely(mbox->ops->startup)) {
-		ret = mbox->ops->startup(mbox);
-		if (unlikely(ret))
-			return ret;
-	}
-
-	ret = request_irq(mbox->irq, mbox_interrupt, IRQF_DISABLED,
-				mbox->name, mbox);
-	if (unlikely(ret)) {
-		printk(KERN_ERR
-			"failed to register mailbox interrupt:%d\n", ret);
-		goto fail_request_irq;
-	}
-
-	mq = mbox_queue_alloc(mbox, mbox_txq_fn, mbox_tx_work);
-	if (!mq) {
-		ret = -ENOMEM;
-		goto fail_alloc_txq;
-	}
-	mbox->txq = mq;
-
-	mq = mbox_queue_alloc(mbox, mbox_rxq_fn, mbox_rx_work);
-	if (!mq) {
-		ret = -ENOMEM;
-		goto fail_alloc_rxq;
-	}
-	mbox->rxq = mq;
-
-	return 0;
-
- fail_alloc_rxq:
-	mbox_queue_free(mbox->txq);
- fail_alloc_txq:
-	free_irq(mbox->irq, mbox);
- fail_request_irq:
-	if (unlikely(mbox->ops->shutdown))
-		mbox->ops->shutdown(mbox);
-
-	return ret;
-}
-
-static void omap_mbox_fini(struct omap_mbox *mbox)
-{
-	mbox_queue_free(mbox->txq);
-	mbox_queue_free(mbox->rxq);
-
-	free_irq(mbox->irq, mbox);
-
-	if (unlikely(mbox->ops->shutdown))
-		mbox->ops->shutdown(mbox);
-}
-
-static struct omap_mbox **find_mboxes(const char *name)
-{
-	struct omap_mbox **p;
-
-	for (p = &mboxes; *p; p = &(*p)->next) {
-		if (strcmp((*p)->name, name) == 0)
-			break;
-	}
-
-	return p;
-}
-
-struct omap_mbox *omap_mbox_get(const char *name)
-{
-	struct omap_mbox *mbox;
-	int ret;
-
-	read_lock(&mboxes_lock);
-	mbox = *(find_mboxes(name));
-	if (mbox == NULL) {
-		read_unlock(&mboxes_lock);
-		return ERR_PTR(-ENOENT);
-	}
-
-	read_unlock(&mboxes_lock);
-
-	ret = omap_mbox_init(mbox);
-	if (ret)
-		return ERR_PTR(-ENODEV);
-
-	return mbox;
-}
-EXPORT_SYMBOL(omap_mbox_get);
-
-void omap_mbox_put(struct omap_mbox *mbox)
-{
-	omap_mbox_fini(mbox);
-}
-EXPORT_SYMBOL(omap_mbox_put);
-
-int omap_mbox_register(struct device *parent, struct omap_mbox *mbox)
-{
-	int ret = 0;
-	struct omap_mbox **tmp;
-
-	if (!mbox)
-		return -EINVAL;
-	if (mbox->next)
-		return -EBUSY;
-
-	mbox->dev = device_create(&omap_mbox_class,
-				  parent, 0, mbox, "%s", mbox->name);
-	if (IS_ERR(mbox->dev))
-		return PTR_ERR(mbox->dev);
-
-	ret = device_create_file(mbox->dev, &dev_attr_mbox);
-	if (ret)
-		goto err_sysfs;
-
-	write_lock(&mboxes_lock);
-	tmp = find_mboxes(mbox->name);
-	if (*tmp) {
-		ret = -EBUSY;
-		write_unlock(&mboxes_lock);
-		goto err_find;
-	}
-	*tmp = mbox;
-	write_unlock(&mboxes_lock);
-
-	return 0;
-
-err_find:
-	device_remove_file(mbox->dev, &dev_attr_mbox);
-err_sysfs:
-	device_unregister(mbox->dev);
-	return ret;
-}
-EXPORT_SYMBOL(omap_mbox_register);
-
-int omap_mbox_unregister(struct omap_mbox *mbox)
-{
-	struct omap_mbox **tmp;
-
-	write_lock(&mboxes_lock);
-	tmp = &mboxes;
-	while (*tmp) {
-		if (mbox == *tmp) {
-			*tmp = mbox->next;
-			mbox->next = NULL;
-			write_unlock(&mboxes_lock);
-			device_remove_file(mbox->dev, &dev_attr_mbox);
-			device_unregister(mbox->dev);
-			return 0;
-		}
-		tmp = &(*tmp)->next;
-	}
-	write_unlock(&mboxes_lock);
-
-	return -EINVAL;
-}
-EXPORT_SYMBOL(omap_mbox_unregister);
-
-static int __init omap_mbox_class_init(void)
-{
-	int ret = class_register(&omap_mbox_class);
-	if (!ret)
-		ret = class_create_file(&omap_mbox_class, &class_attr_mbox);
-
-	return ret;
-}
-
-static void __exit omap_mbox_class_exit(void)
-{
-	class_remove_file(&omap_mbox_class, &class_attr_mbox);
-	class_unregister(&omap_mbox_class);
-}
-
-subsys_initcall(omap_mbox_class_init);
-module_exit(omap_mbox_class_exit);
-
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("omap mailbox: interrupt driven messaging");
-MODULE_AUTHOR("Toshihiro Kobayashi and Hiroshi DOYU");