2 * UWB Multi-interface Controller device management.
4 * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
6 * This file is released under the GNU GPL v2.
8 #include <linux/kernel.h>
9 #include <linux/uwb/umc.h>
11 #include <linux/uwb/debug.h>
13 static void umc_device_release(struct device
*dev
)
15 struct umc_dev
*umc
= to_umc_dev(dev
);
21 * umc_device_create - allocate a child UMC device
22 * @parent: parent of the new UMC device.
23 * @n: index of the new device.
25 * The new UMC device will have a bus ID of the parent with '-n'
28 struct umc_dev
*umc_device_create(struct device
*parent
, int n
)
32 umc
= kzalloc(sizeof(struct umc_dev
), GFP_KERNEL
);
34 snprintf(umc
->dev
.bus_id
, sizeof(umc
->dev
.bus_id
), "%s-%d",
36 umc
->dev
.parent
= parent
;
37 umc
->dev
.bus
= &umc_bus_type
;
38 umc
->dev
.release
= umc_device_release
;
40 umc
->dev
.dma_mask
= parent
->dma_mask
;
44 EXPORT_SYMBOL_GPL(umc_device_create
);
47 * umc_device_register - register a UMC device
48 * @umc: pointer to the UMC device
50 * The memory resource for the UMC device is acquired and the device
51 * registered with the system.
53 int umc_device_register(struct umc_dev
*umc
)
57 d_fnstart(3, &umc
->dev
, "(umc_dev %p)\n", umc
);
59 err
= request_resource(umc
->resource
.parent
, &umc
->resource
);
61 dev_err(&umc
->dev
, "can't allocate resource range "
62 "%016Lx to %016Lx: %d\n",
63 (unsigned long long)umc
->resource
.start
,
64 (unsigned long long)umc
->resource
.end
,
66 goto error_request_resource
;
69 err
= device_register(&umc
->dev
);
71 goto error_device_register
;
72 d_fnend(3, &umc
->dev
, "(umc_dev %p) = 0\n", umc
);
75 error_device_register
:
76 release_resource(&umc
->resource
);
77 error_request_resource
:
78 d_fnend(3, &umc
->dev
, "(umc_dev %p) = %d\n", umc
, err
);
81 EXPORT_SYMBOL_GPL(umc_device_register
);
84 * umc_device_unregister - unregister a UMC device
85 * @umc: pointer to the UMC device
87 * First we unregister the device, make sure the driver can do it's
88 * resource release thing and then we try to release any left over
89 * resources. We take a ref to the device, to make sure it doesn't
90 * dissapear under our feet.
92 void umc_device_unregister(struct umc_dev
*umc
)
97 dev
= get_device(&umc
->dev
);
98 d_fnstart(3, dev
, "(umc_dev %p)\n", umc
);
99 device_unregister(&umc
->dev
);
100 release_resource(&umc
->resource
);
101 d_fnend(3, dev
, "(umc_dev %p) = void\n", umc
);
104 EXPORT_SYMBOL_GPL(umc_device_unregister
);
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