forked from luck/tmp_suning_uos_patched
ae9eba0e27
Cc: David Vrabel <david.vrabel@csr.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-Off-By: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: David Vrabel <david.vrabel@csr.com>
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/*
|
|
* UWB Multi-interface Controller device management.
|
|
*
|
|
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
|
|
*
|
|
* This file is released under the GNU GPL v2.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/uwb/umc.h>
|
|
#define D_LOCAL 0
|
|
#include <linux/uwb/debug.h>
|
|
|
|
static void umc_device_release(struct device *dev)
|
|
{
|
|
struct umc_dev *umc = to_umc_dev(dev);
|
|
|
|
kfree(umc);
|
|
}
|
|
|
|
/**
|
|
* umc_device_create - allocate a child UMC device
|
|
* @parent: parent of the new UMC device.
|
|
* @n: index of the new device.
|
|
*
|
|
* The new UMC device will have a bus ID of the parent with '-n'
|
|
* appended.
|
|
*/
|
|
struct umc_dev *umc_device_create(struct device *parent, int n)
|
|
{
|
|
struct umc_dev *umc;
|
|
|
|
umc = kzalloc(sizeof(struct umc_dev), GFP_KERNEL);
|
|
if (umc) {
|
|
dev_set_name(&umc->dev, "%s-%d", dev_name(parent), n);
|
|
umc->dev.parent = parent;
|
|
umc->dev.bus = &umc_bus_type;
|
|
umc->dev.release = umc_device_release;
|
|
|
|
umc->dev.dma_mask = parent->dma_mask;
|
|
}
|
|
return umc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(umc_device_create);
|
|
|
|
/**
|
|
* umc_device_register - register a UMC device
|
|
* @umc: pointer to the UMC device
|
|
*
|
|
* The memory resource for the UMC device is acquired and the device
|
|
* registered with the system.
|
|
*/
|
|
int umc_device_register(struct umc_dev *umc)
|
|
{
|
|
int err;
|
|
|
|
d_fnstart(3, &umc->dev, "(umc_dev %p)\n", umc);
|
|
|
|
err = request_resource(umc->resource.parent, &umc->resource);
|
|
if (err < 0) {
|
|
dev_err(&umc->dev, "can't allocate resource range "
|
|
"%016Lx to %016Lx: %d\n",
|
|
(unsigned long long)umc->resource.start,
|
|
(unsigned long long)umc->resource.end,
|
|
err);
|
|
goto error_request_resource;
|
|
}
|
|
|
|
err = device_register(&umc->dev);
|
|
if (err < 0)
|
|
goto error_device_register;
|
|
d_fnend(3, &umc->dev, "(umc_dev %p) = 0\n", umc);
|
|
return 0;
|
|
|
|
error_device_register:
|
|
release_resource(&umc->resource);
|
|
error_request_resource:
|
|
d_fnend(3, &umc->dev, "(umc_dev %p) = %d\n", umc, err);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(umc_device_register);
|
|
|
|
/**
|
|
* umc_device_unregister - unregister a UMC device
|
|
* @umc: pointer to the UMC device
|
|
*
|
|
* First we unregister the device, make sure the driver can do it's
|
|
* resource release thing and then we try to release any left over
|
|
* resources. We take a ref to the device, to make sure it doesn't
|
|
* dissapear under our feet.
|
|
*/
|
|
void umc_device_unregister(struct umc_dev *umc)
|
|
{
|
|
struct device *dev;
|
|
if (!umc)
|
|
return;
|
|
dev = get_device(&umc->dev);
|
|
d_fnstart(3, dev, "(umc_dev %p)\n", umc);
|
|
device_unregister(&umc->dev);
|
|
release_resource(&umc->resource);
|
|
d_fnend(3, dev, "(umc_dev %p) = void\n", umc);
|
|
put_device(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(umc_device_unregister);
|