[ARM] Move AMBA bus code to drivers/amba/

Make the AMBA bus code visible to other architectures.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 0 insertions, 359 deletions

diff --git a/arch/arm/common/amba.c b/arch/arm/common/amba.c
deleted file mode 100644
index 1bbdd16..0000000
--- a/arch/arm/common/amba.c
+++ /dev/null
@@ -1,359 +0,0 @@
-/*
- *  linux/arch/arm/common/amba.c
- *
- *  Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
- *
- * 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.
- */
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-#include <linux/amba/bus.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/sizes.h>
-
-#define to_amba_device(d)	container_of(d, struct amba_device, dev)
-#define to_amba_driver(d)	container_of(d, struct amba_driver, drv)
-
-static struct amba_id *
-amba_lookup(struct amba_id *table, struct amba_device *dev)
-{
-	int ret = 0;
-
-	while (table->mask) {
-		ret = (dev->periphid & table->mask) == table->id;
-		if (ret)
-			break;
-		table++;
-	}
-
-	return ret ? table : NULL;
-}
-
-static int amba_match(struct device *dev, struct device_driver *drv)
-{
-	struct amba_device *pcdev = to_amba_device(dev);
-	struct amba_driver *pcdrv = to_amba_driver(drv);
-
-	return amba_lookup(pcdrv->id_table, pcdev) != NULL;
-}
-
-#ifdef CONFIG_HOTPLUG
-static int amba_uevent(struct device *dev, char **envp, int nr_env, char *buf, int bufsz)
-{
-	struct amba_device *pcdev = to_amba_device(dev);
-
-	if (nr_env < 2)
-		return -ENOMEM;
-
-	snprintf(buf, bufsz, "AMBA_ID=%08x", pcdev->periphid);
-	*envp++ = buf;
-	*envp++ = NULL;
-	return 0;
-}
-#else
-#define amba_uevent NULL
-#endif
-
-static int amba_suspend(struct device *dev, pm_message_t state)
-{
-	struct amba_driver *drv = to_amba_driver(dev->driver);
-	int ret = 0;
-
-	if (dev->driver && drv->suspend)
-		ret = drv->suspend(to_amba_device(dev), state);
-	return ret;
-}
-
-static int amba_resume(struct device *dev)
-{
-	struct amba_driver *drv = to_amba_driver(dev->driver);
-	int ret = 0;
-
-	if (dev->driver && drv->resume)
-		ret = drv->resume(to_amba_device(dev));
-	return ret;
-}
-
-/*
- * Primecells are part of the Advanced Microcontroller Bus Architecture,
- * so we call the bus "amba".
- */
-static struct bus_type amba_bustype = {
-	.name		= "amba",
-	.match		= amba_match,
-	.uevent		= amba_uevent,
-	.suspend	= amba_suspend,
-	.resume		= amba_resume,
-};
-
-static int __init amba_init(void)
-{
-	return bus_register(&amba_bustype);
-}
-
-postcore_initcall(amba_init);
-
-/*
- * These are the device model conversion veneers; they convert the
- * device model structures to our more specific structures.
- */
-static int amba_probe(struct device *dev)
-{
-	struct amba_device *pcdev = to_amba_device(dev);
-	struct amba_driver *pcdrv = to_amba_driver(dev->driver);
-	struct amba_id *id;
-
-	id = amba_lookup(pcdrv->id_table, pcdev);
-
-	return pcdrv->probe(pcdev, id);
-}
-
-static int amba_remove(struct device *dev)
-{
-	struct amba_driver *drv = to_amba_driver(dev->driver);
-	return drv->remove(to_amba_device(dev));
-}
-
-static void amba_shutdown(struct device *dev)
-{
-	struct amba_driver *drv = to_amba_driver(dev->driver);
-	drv->shutdown(to_amba_device(dev));
-}
-
-/**
- *	amba_driver_register - register an AMBA device driver
- *	@drv: amba device driver structure
- *
- *	Register an AMBA device driver with the Linux device model
- *	core.  If devices pre-exist, the drivers probe function will
- *	be called.
- */
-int amba_driver_register(struct amba_driver *drv)
-{
-	drv->drv.bus = &amba_bustype;
-
-#define SETFN(fn)	if (drv->fn) drv->drv.fn = amba_##fn
-	SETFN(probe);
-	SETFN(remove);
-	SETFN(shutdown);
-
-	return driver_register(&drv->drv);
-}
-
-/**
- *	amba_driver_unregister - remove an AMBA device driver
- *	@drv: AMBA device driver structure to remove
- *
- *	Unregister an AMBA device driver from the Linux device
- *	model.  The device model will call the drivers remove function
- *	for each device the device driver is currently handling.
- */
-void amba_driver_unregister(struct amba_driver *drv)
-{
-	driver_unregister(&drv->drv);
-}
-
-
-static void amba_device_release(struct device *dev)
-{
-	struct amba_device *d = to_amba_device(dev);
-
-	if (d->res.parent)
-		release_resource(&d->res);
-	kfree(d);
-}
-
-#define amba_attr(name,fmt,arg...)				\
-static ssize_t show_##name(struct device *_dev, struct device_attribute *attr, char *buf)	\
-{								\
-	struct amba_device *dev = to_amba_device(_dev);		\
-	return sprintf(buf, fmt, arg);				\
-}								\
-static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
-
-amba_attr(id, "%08x\n", dev->periphid);
-amba_attr(irq0, "%u\n", dev->irq[0]);
-amba_attr(irq1, "%u\n", dev->irq[1]);
-amba_attr(resource, "\t%08lx\t%08lx\t%08lx\n",
-	  dev->res.start, dev->res.end, dev->res.flags);
-
-/**
- *	amba_device_register - register an AMBA device
- *	@dev: AMBA device to register
- *	@parent: parent memory resource
- *
- *	Setup the AMBA device, reading the cell ID if present.
- *	Claim the resource, and register the AMBA device with
- *	the Linux device manager.
- */
-int amba_device_register(struct amba_device *dev, struct resource *parent)
-{
-	u32 pid, cid;
-	void __iomem *tmp;
-	int i, ret;
-
-	dev->dev.release = amba_device_release;
-	dev->dev.bus = &amba_bustype;
-	dev->dev.dma_mask = &dev->dma_mask;
-	dev->res.name = dev->dev.bus_id;
-
-	if (!dev->dev.coherent_dma_mask && dev->dma_mask)
-		dev_warn(&dev->dev, "coherent dma mask is unset\n");
-
-	ret = request_resource(parent, &dev->res);
-	if (ret == 0) {
-		tmp = ioremap(dev->res.start, SZ_4K);
-		if (!tmp) {
-			ret = -ENOMEM;
-			goto out;
-		}
-
-		for (pid = 0, i = 0; i < 4; i++)
-			pid |= (readl(tmp + 0xfe0 + 4 * i) & 255) << (i * 8);
-		for (cid = 0, i = 0; i < 4; i++)
-			cid |= (readl(tmp + 0xff0 + 4 * i) & 255) << (i * 8);
-
-		iounmap(tmp);
-
-		if (cid == 0xb105f00d)
-			dev->periphid = pid;
-
-		if (dev->periphid)
-			ret = device_register(&dev->dev);
-		else
-			ret = -ENODEV;
-
-		if (ret == 0) {
-			device_create_file(&dev->dev, &dev_attr_id);
-			if (dev->irq[0] != NO_IRQ)
-				device_create_file(&dev->dev, &dev_attr_irq0);
-			if (dev->irq[1] != NO_IRQ)
-				device_create_file(&dev->dev, &dev_attr_irq1);
-			device_create_file(&dev->dev, &dev_attr_resource);
-		} else {
- out:
-			release_resource(&dev->res);
-		}
-	}
-	return ret;
-}
-
-/**
- *	amba_device_unregister - unregister an AMBA device
- *	@dev: AMBA device to remove
- *
- *	Remove the specified AMBA device from the Linux device
- *	manager.  All files associated with this object will be
- *	destroyed, and device drivers notified that the device has
- *	been removed.  The AMBA device's resources including
- *	the amba_device structure will be freed once all
- *	references to it have been dropped.
- */
-void amba_device_unregister(struct amba_device *dev)
-{
-	device_unregister(&dev->dev);
-}
-
-
-struct find_data {
-	struct amba_device *dev;
-	struct device *parent;
-	const char *busid;
-	unsigned int id;
-	unsigned int mask;
-};
-
-static int amba_find_match(struct device *dev, void *data)
-{
-	struct find_data *d = data;
-	struct amba_device *pcdev = to_amba_device(dev);
-	int r;
-
-	r = (pcdev->periphid & d->mask) == d->id;
-	if (d->parent)
-		r &= d->parent == dev->parent;
-	if (d->busid)
-		r &= strcmp(dev->bus_id, d->busid) == 0;
-
-	if (r) {
-		get_device(dev);
-		d->dev = pcdev;
-	}
-
-	return r;
-}
-
-/**
- *	amba_find_device - locate an AMBA device given a bus id
- *	@busid: bus id for device (or NULL)
- *	@parent: parent device (or NULL)
- *	@id: peripheral ID (or 0)
- *	@mask: peripheral ID mask (or 0)
- *
- *	Return the AMBA device corresponding to the supplied parameters.
- *	If no device matches, returns NULL.
- *
- *	NOTE: When a valid device is found, its refcount is
- *	incremented, and must be decremented before the returned
- *	reference.
- */
-struct amba_device *
-amba_find_device(const char *busid, struct device *parent, unsigned int id,
-		 unsigned int mask)
-{
-	struct find_data data;
-
-	data.dev = NULL;
-	data.parent = parent;
-	data.busid = busid;
-	data.id = id;
-	data.mask = mask;
-
-	bus_for_each_dev(&amba_bustype, NULL, &data, amba_find_match);
-
-	return data.dev;
-}
-
-/**
- *	amba_request_regions - request all mem regions associated with device
- *	@dev: amba_device structure for device
- *	@name: name, or NULL to use driver name
- */
-int amba_request_regions(struct amba_device *dev, const char *name)
-{
-	int ret = 0;
-
-	if (!name)
-		name = dev->dev.driver->name;
-
-	if (!request_mem_region(dev->res.start, SZ_4K, name))
-		ret = -EBUSY;
-
-	return ret;
-}
-
-/**
- *	amba_release_regions - release mem regions assoicated with device
- *	@dev: amba_device structure for device
- *
- *	Release regions claimed by a successful call to amba_request_regions.
- */
-void amba_release_regions(struct amba_device *dev)
-{
-	release_mem_region(dev->res.start, SZ_4K);
-}
-
-EXPORT_SYMBOL(amba_driver_register);
-EXPORT_SYMBOL(amba_driver_unregister);
-EXPORT_SYMBOL(amba_device_register);
-EXPORT_SYMBOL(amba_device_unregister);
-EXPORT_SYMBOL(amba_find_device);
-EXPORT_SYMBOL(amba_request_regions);
-EXPORT_SYMBOL(amba_release_regions);