android_kernel_xiaomi_sm8350/arch/arm/common/amba.c
Tim Schmielau 4e57b68178 [PATCH] fix missing includes
I recently picked up my older work to remove unnecessary #includes of
sched.h, starting from a patch by Dave Jones to not include sched.h
from module.h. This reduces the number of indirect includes of sched.h
by ~300. Another ~400 pointless direct includes can be removed after
this disentangling (patch to follow later).
However, quite a few indirect includes need to be fixed up for this.

In order to feed the patches through -mm with as little disturbance as
possible, I've split out the fixes I accumulated up to now (complete for
i386 and x86_64, more archs to follow later) and post them before the real
patch.  This way this large part of the patch is kept simple with only
adding #includes, and all hunks are independent of each other.  So if any
hunk rejects or gets in the way of other patches, just drop it.  My scripts
will pick it up again in the next round.

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-30 17:37:32 -08:00

360 lines
8.5 KiB
C

/*
* 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 <asm/io.h>
#include <asm/irq.h>
#include <asm/hardware/amba.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_hotplug(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_hotplug 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,
.hotplug = amba_hotplug,
.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);