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1/*
2 * UWB Multi-interface Controller device management.
3 *
4 * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
5 *
6 * This file is released under the GNU GPL v2.
7 */
8#include <linux/kernel.h>
9#include <linux/slab.h>
10#include <linux/uwb/umc.h>
11
12static void umc_device_release(struct device *dev)
13{
14 struct umc_dev *umc = to_umc_dev(dev);
15
16 kfree(umc);
17}
18
19/**
20 * umc_device_create - allocate a child UMC device
21 * @parent: parent of the new UMC device.
22 * @n: index of the new device.
23 *
24 * The new UMC device will have a bus ID of the parent with '-n'
25 * appended.
26 */
27struct umc_dev *umc_device_create(struct device *parent, int n)
28{
29 struct umc_dev *umc;
30
31 umc = kzalloc(sizeof(struct umc_dev), GFP_KERNEL);
32 if (umc) {
33 dev_set_name(&umc->dev, "%s-%d", dev_name(parent), n);
34 umc->dev.parent = parent;
35 umc->dev.bus = &umc_bus_type;
36 umc->dev.release = umc_device_release;
37
38 umc->dev.dma_mask = parent->dma_mask;
39 }
40 return umc;
41}
42EXPORT_SYMBOL_GPL(umc_device_create);
43
44/**
45 * umc_device_register - register a UMC device
46 * @umc: pointer to the UMC device
47 *
48 * The memory resource for the UMC device is acquired and the device
49 * registered with the system.
50 */
51int umc_device_register(struct umc_dev *umc)
52{
53 int err;
54
55 err = request_resource(umc->resource.parent, &umc->resource);
56 if (err < 0) {
57 dev_err(&umc->dev, "can't allocate resource range %pR: %d\n",
58 &umc->resource, err);
59 goto error_request_resource;
60 }
61
62 err = device_register(&umc->dev);
63 if (err < 0)
64 goto error_device_register;
65 return 0;
66
67error_device_register:
68 release_resource(&umc->resource);
69error_request_resource:
70 return err;
71}
72EXPORT_SYMBOL_GPL(umc_device_register);
73
74/**
75 * umc_device_unregister - unregister a UMC device
76 * @umc: pointer to the UMC device
77 *
78 * First we unregister the device, make sure the driver can do it's
79 * resource release thing and then we try to release any left over
80 * resources. We take a ref to the device, to make sure it doesn't
81 * disappear under our feet.
82 */
83void umc_device_unregister(struct umc_dev *umc)
84{
85 struct device *dev;
86 if (!umc)
87 return;
88 dev = get_device(&umc->dev);
89 device_unregister(&umc->dev);
90 release_resource(&umc->resource);
91 put_device(dev);
92}
93EXPORT_SYMBOL_GPL(umc_device_unregister);
1/*
2 * UWB Multi-interface Controller device management.
3 *
4 * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
5 *
6 * This file is released under the GNU GPL v2.
7 */
8#include <linux/kernel.h>
9#include <linux/export.h>
10#include <linux/slab.h>
11#include <linux/uwb/umc.h>
12
13static void umc_device_release(struct device *dev)
14{
15 struct umc_dev *umc = to_umc_dev(dev);
16
17 kfree(umc);
18}
19
20/**
21 * umc_device_create - allocate a child UMC device
22 * @parent: parent of the new UMC device.
23 * @n: index of the new device.
24 *
25 * The new UMC device will have a bus ID of the parent with '-n'
26 * appended.
27 */
28struct umc_dev *umc_device_create(struct device *parent, int n)
29{
30 struct umc_dev *umc;
31
32 umc = kzalloc(sizeof(struct umc_dev), GFP_KERNEL);
33 if (umc) {
34 dev_set_name(&umc->dev, "%s-%d", dev_name(parent), n);
35 umc->dev.parent = parent;
36 umc->dev.bus = &umc_bus_type;
37 umc->dev.release = umc_device_release;
38
39 umc->dev.dma_mask = parent->dma_mask;
40 }
41 return umc;
42}
43EXPORT_SYMBOL_GPL(umc_device_create);
44
45/**
46 * umc_device_register - register a UMC device
47 * @umc: pointer to the UMC device
48 *
49 * The memory resource for the UMC device is acquired and the device
50 * registered with the system.
51 */
52int umc_device_register(struct umc_dev *umc)
53{
54 int err;
55
56 err = request_resource(umc->resource.parent, &umc->resource);
57 if (err < 0) {
58 dev_err(&umc->dev, "can't allocate resource range %pR: %d\n",
59 &umc->resource, err);
60 goto error_request_resource;
61 }
62
63 err = device_register(&umc->dev);
64 if (err < 0)
65 goto error_device_register;
66 return 0;
67
68error_device_register:
69 put_device(&umc->dev);
70 release_resource(&umc->resource);
71error_request_resource:
72 return err;
73}
74EXPORT_SYMBOL_GPL(umc_device_register);
75
76/**
77 * umc_device_unregister - unregister a UMC device
78 * @umc: pointer to the UMC device
79 *
80 * First we unregister the device, make sure the driver can do it's
81 * resource release thing and then we try to release any left over
82 * resources. We take a ref to the device, to make sure it doesn't
83 * disappear under our feet.
84 */
85void umc_device_unregister(struct umc_dev *umc)
86{
87 struct device *dev;
88 if (!umc)
89 return;
90 dev = get_device(&umc->dev);
91 device_unregister(&umc->dev);
92 release_resource(&umc->resource);
93 put_device(dev);
94}
95EXPORT_SYMBOL_GPL(umc_device_unregister);