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1 | /* |
2 | * UWB Multi-interface Controller support. | |
3 | * | |
4 | * Copyright (C) 2007 Cambridge Silicon Radio Ltd. | |
5 | * | |
6 | * This file is released under the GPLv2 | |
7 | * | |
8 | * UMC (UWB Multi-interface Controller) capabilities (e.g., radio | |
9 | * controller, host controller) are presented as devices on the "umc" | |
10 | * bus. | |
11 | * | |
12 | * The radio controller is not strictly a UMC capability but it's | |
13 | * useful to present it as such. | |
14 | * | |
15 | * References: | |
16 | * | |
17 | * [WHCI] Wireless Host Controller Interface Specification for | |
18 | * Certified Wireless Universal Serial Bus, revision 0.95. | |
19 | * | |
20 | * How this works is kind of convoluted but simple. The whci.ko driver | |
21 | * loads when WHCI devices are detected. These WHCI devices expose | |
22 | * many devices in the same PCI function (they couldn't have reused | |
23 | * functions, no), so for each PCI function that exposes these many | |
24 | * devices, whci ceates a umc_dev [whci_probe() -> whci_add_cap()] | |
25 | * with umc_device_create() and adds it to the bus with | |
26 | * umc_device_register(). | |
27 | * | |
28 | * umc_device_register() calls device_register() which will push the | |
29 | * bus management code to load your UMC driver's somehting_probe() | |
30 | * that you have registered for that capability code. | |
31 | * | |
32 | * Now when the WHCI device is removed, whci_remove() will go over | |
33 | * each umc_dev assigned to each of the PCI function's capabilities | |
34 | * and through whci_del_cap() call umc_device_unregister() each | |
35 | * created umc_dev. Of course, if you are bound to the device, your | |
36 | * driver's something_remove() will be called. | |
37 | */ | |
38 | ||
39 | #ifndef _LINUX_UWB_UMC_H_ | |
40 | #define _LINUX_UWB_UMC_H_ | |
41 | ||
42 | #include <linux/device.h> | |
43 | #include <linux/pci.h> | |
44 | ||
45 | /* | |
46 | * UMC capability IDs. | |
47 | * | |
48 | * 0x00 is reserved so use it for the radio controller device. | |
49 | * | |
50 | * [WHCI] table 2-8 | |
51 | */ | |
52 | #define UMC_CAP_ID_WHCI_RC 0x00 /* radio controller */ | |
53 | #define UMC_CAP_ID_WHCI_WUSB_HC 0x01 /* WUSB host controller */ | |
54 | ||
55 | /** | |
56 | * struct umc_dev - UMC capability device | |
57 | * | |
58 | * @version: version of the specification this capability conforms to. | |
59 | * @cap_id: capability ID. | |
60 | * @bar: PCI Bar (64 bit) where the resource lies | |
61 | * @resource: register space resource. | |
62 | * @irq: interrupt line. | |
63 | */ | |
64 | struct umc_dev { | |
65 | u16 version; | |
66 | u8 cap_id; | |
67 | u8 bar; | |
68 | struct resource resource; | |
69 | unsigned irq; | |
70 | struct device dev; | |
71 | }; | |
72 | ||
73 | #define to_umc_dev(d) container_of(d, struct umc_dev, dev) | |
74 | ||
75 | /** | |
76 | * struct umc_driver - UMC capability driver | |
77 | * @cap_id: supported capability ID. | |
78 | * @match: driver specific capability matching function. | |
79 | * @match_data: driver specific data for match() (e.g., a | |
80 | * table of pci_device_id's if umc_match_pci_id() is used). | |
81 | */ | |
82 | struct umc_driver { | |
83 | char *name; | |
84 | u8 cap_id; | |
85 | int (*match)(struct umc_driver *, struct umc_dev *); | |
86 | const void *match_data; | |
87 | ||
88 | int (*probe)(struct umc_dev *); | |
89 | void (*remove)(struct umc_dev *); | |
90 | int (*suspend)(struct umc_dev *, pm_message_t state); | |
91 | int (*resume)(struct umc_dev *); | |
307ba6dd DV |
92 | int (*pre_reset)(struct umc_dev *); |
93 | int (*post_reset)(struct umc_dev *); | |
da389eac DV |
94 | |
95 | struct device_driver driver; | |
96 | }; | |
97 | ||
98 | #define to_umc_driver(d) container_of(d, struct umc_driver, driver) | |
99 | ||
100 | extern struct bus_type umc_bus_type; | |
101 | ||
102 | struct umc_dev *umc_device_create(struct device *parent, int n); | |
103 | int __must_check umc_device_register(struct umc_dev *umc); | |
104 | void umc_device_unregister(struct umc_dev *umc); | |
105 | ||
106 | int __must_check __umc_driver_register(struct umc_driver *umc_drv, | |
107 | struct module *mod, | |
108 | const char *mod_name); | |
109 | ||
110 | /** | |
111 | * umc_driver_register - register a UMC capabiltity driver. | |
112 | * @umc_drv: pointer to the driver. | |
113 | */ | |
eb5589a8 PG |
114 | #define umc_driver_register(umc_drv) \ |
115 | __umc_driver_register(umc_drv, THIS_MODULE, KBUILD_MODNAME) | |
116 | ||
da389eac DV |
117 | void umc_driver_unregister(struct umc_driver *umc_drv); |
118 | ||
119 | /* | |
120 | * Utility function you can use to match (umc_driver->match) against a | |
121 | * null-terminated array of 'struct pci_device_id' in | |
122 | * umc_driver->match_data. | |
123 | */ | |
124 | int umc_match_pci_id(struct umc_driver *umc_drv, struct umc_dev *umc); | |
125 | ||
126 | /** | |
127 | * umc_parent_pci_dev - return the UMC's parent PCI device or NULL if none | |
128 | * @umc_dev: UMC device whose parent PCI device we are looking for | |
129 | * | |
130 | * DIRTY!!! DON'T RELY ON THIS | |
131 | * | |
132 | * FIXME: This is as dirty as it gets, but we need some way to check | |
133 | * the correct type of umc_dev->parent (so that for example, we can | |
25985edc | 134 | * cast to pci_dev). Casting to pci_dev is necessary because at some |
da389eac DV |
135 | * point we need to request resources from the device. Mapping is |
136 | * easily over come (ioremap and stuff are bus agnostic), but hooking | |
137 | * up to some error handlers (such as pci error handlers) might need | |
138 | * this. | |
139 | * | |
140 | * THIS might (probably will) be removed in the future, so don't count | |
141 | * on it. | |
142 | */ | |
143 | static inline struct pci_dev *umc_parent_pci_dev(struct umc_dev *umc_dev) | |
144 | { | |
145 | struct pci_dev *pci_dev = NULL; | |
0d4e5bee | 146 | if (dev_is_pci(umc_dev->dev.parent)) |
da389eac DV |
147 | pci_dev = to_pci_dev(umc_dev->dev.parent); |
148 | return pci_dev; | |
149 | } | |
150 | ||
151 | /** | |
152 | * umc_dev_get() - reference a UMC device. | |
153 | * @umc_dev: Pointer to UMC device. | |
154 | * | |
155 | * NOTE: we are assuming in this whole scheme that the parent device | |
156 | * is referenced at _probe() time and unreferenced at _remove() | |
157 | * time by the parent's subsystem. | |
158 | */ | |
159 | static inline struct umc_dev *umc_dev_get(struct umc_dev *umc_dev) | |
160 | { | |
161 | get_device(&umc_dev->dev); | |
162 | return umc_dev; | |
163 | } | |
164 | ||
165 | /** | |
166 | * umc_dev_put() - unreference a UMC device. | |
167 | * @umc_dev: Pointer to UMC device. | |
168 | */ | |
169 | static inline void umc_dev_put(struct umc_dev *umc_dev) | |
170 | { | |
171 | put_device(&umc_dev->dev); | |
172 | } | |
173 | ||
174 | /** | |
175 | * umc_set_drvdata - set UMC device's driver data. | |
176 | * @umc_dev: Pointer to UMC device. | |
177 | * @data: Data to set. | |
178 | */ | |
179 | static inline void umc_set_drvdata(struct umc_dev *umc_dev, void *data) | |
180 | { | |
181 | dev_set_drvdata(&umc_dev->dev, data); | |
182 | } | |
183 | ||
184 | /** | |
185 | * umc_get_drvdata - recover UMC device's driver data. | |
186 | * @umc_dev: Pointer to UMC device. | |
187 | */ | |
188 | static inline void *umc_get_drvdata(struct umc_dev *umc_dev) | |
189 | { | |
190 | return dev_get_drvdata(&umc_dev->dev); | |
191 | } | |
192 | ||
193 | int umc_controller_reset(struct umc_dev *umc); | |
194 | ||
195 | #endif /* #ifndef _LINUX_UWB_UMC_H_ */ |