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);