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 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;
39 umc->dev.dma_mask = parent->dma_mask;
43 EXPORT_SYMBOL_GPL(umc_device_create);
46 * umc_device_register - register a UMC device
47 * @umc: pointer to the UMC device
49 * The memory resource for the UMC device is acquired and the device
50 * registered with the system.
52 int umc_device_register(struct umc_dev *umc)
56 d_fnstart(3, &umc->dev, "(umc_dev %p)\n", umc);
58 err = request_resource(umc->resource.parent, &umc->resource);
60 dev_err(&umc->dev, "can't allocate resource range "
61 "%016Lx to %016Lx: %d\n",
62 (unsigned long long)umc->resource.start,
63 (unsigned long long)umc->resource.end,
65 goto error_request_resource;
68 err = device_register(&umc->dev);
70 goto error_device_register;
71 d_fnend(3, &umc->dev, "(umc_dev %p) = 0\n", umc);
74 error_device_register:
75 release_resource(&umc->resource);
76 error_request_resource:
77 d_fnend(3, &umc->dev, "(umc_dev %p) = %d\n", umc, err);
80 EXPORT_SYMBOL_GPL(umc_device_register);
83 * umc_device_unregister - unregister a UMC device
84 * @umc: pointer to the UMC device
86 * First we unregister the device, make sure the driver can do it's
87 * resource release thing and then we try to release any left over
88 * resources. We take a ref to the device, to make sure it doesn't
89 * dissapear under our feet.
91 void umc_device_unregister(struct umc_dev *umc)
96 dev = get_device(&umc->dev);
97 d_fnstart(3, dev, "(umc_dev %p)\n", umc);
98 device_unregister(&umc->dev);
99 release_resource(&umc->resource);
100 d_fnend(3, dev, "(umc_dev %p) = void\n", umc);
103 EXPORT_SYMBOL_GPL(umc_device_unregister);