1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/*
* UWB Multi-interface Controller support.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* This file is released under the GPLv2
*
* UMC (UWB Multi-interface Controller) capabilities (e.g., radio
* controller, host controller) are presented as devices on the "umc"
* bus.
*
* The radio controller is not strictly a UMC capability but it's
* useful to present it as such.
*
* References:
*
* [WHCI] Wireless Host Controller Interface Specification for
* Certified Wireless Universal Serial Bus, revision 0.95.
*
* How this works is kind of convoluted but simple. The whci.ko driver
* loads when WHCI devices are detected. These WHCI devices expose
* many devices in the same PCI function (they couldn't have reused
* functions, no), so for each PCI function that exposes these many
* devices, whci ceates a umc_dev [whci_probe() -> whci_add_cap()]
* with umc_device_create() and adds it to the bus with
* umc_device_register().
*
* umc_device_register() calls device_register() which will push the
* bus management code to load your UMC driver's somehting_probe()
* that you have registered for that capability code.
*
* Now when the WHCI device is removed, whci_remove() will go over
* each umc_dev assigned to each of the PCI function's capabilities
* and through whci_del_cap() call umc_device_unregister() each
* created umc_dev. Of course, if you are bound to the device, your
* driver's something_remove() will be called.
*/
#ifndef _LINUX_UWB_UMC_H_
#define _LINUX_UWB_UMC_H_
#include <linux/device.h>
#include <linux/pci.h>
/*
* UMC capability IDs.
*
* 0x00 is reserved so use it for the radio controller device.
*
* [WHCI] table 2-8
*/
#define UMC_CAP_ID_WHCI_RC 0x00 /* radio controller */
#define UMC_CAP_ID_WHCI_WUSB_HC 0x01 /* WUSB host controller */
/**
* struct umc_dev - UMC capability device
*
* @version: version of the specification this capability conforms to.
* @cap_id: capability ID.
* @bar: PCI Bar (64 bit) where the resource lies
* @resource: register space resource.
* @irq: interrupt line.
*/
struct umc_dev {
u16 version;
u8 cap_id;
u8 bar;
struct resource resource;
unsigned irq;
struct device dev;
};
#define to_umc_dev(d) container_of(d, struct umc_dev, dev)
/**
* struct umc_driver - UMC capability driver
* @cap_id: supported capability ID.
* @match: driver specific capability matching function.
* @match_data: driver specific data for match() (e.g., a
* table of pci_device_id's if umc_match_pci_id() is used).
*/
struct umc_driver {
char *name;
u8 cap_id;
int (*match)(struct umc_driver *, struct umc_dev *);
const void *match_data;
int (*probe)(struct umc_dev *);
void (*remove)(struct umc_dev *);
int (*suspend)(struct umc_dev *, pm_message_t state);
int (*resume)(struct umc_dev *);
int (*pre_reset)(struct umc_dev *);
int (*post_reset)(struct umc_dev *);
struct device_driver driver;
};
#define to_umc_driver(d) container_of(d, struct umc_driver, driver)
extern struct bus_type umc_bus_type;
struct umc_dev *umc_device_create(struct device *parent, int n);
int __must_check umc_device_register(struct umc_dev *umc);
void umc_device_unregister(struct umc_dev *umc);
int __must_check __umc_driver_register(struct umc_driver *umc_drv,
struct module *mod,
const char *mod_name);
/**
* umc_driver_register - register a UMC capabiltity driver.
* @umc_drv: pointer to the driver.
*/
static inline int __must_check umc_driver_register(struct umc_driver *umc_drv)
{
return __umc_driver_register(umc_drv, THIS_MODULE, KBUILD_MODNAME);
}
void umc_driver_unregister(struct umc_driver *umc_drv);
/*
* Utility function you can use to match (umc_driver->match) against a
* null-terminated array of 'struct pci_device_id' in
* umc_driver->match_data.
*/
int umc_match_pci_id(struct umc_driver *umc_drv, struct umc_dev *umc);
/**
* umc_parent_pci_dev - return the UMC's parent PCI device or NULL if none
* @umc_dev: UMC device whose parent PCI device we are looking for
*
* DIRTY!!! DON'T RELY ON THIS
*
* FIXME: This is as dirty as it gets, but we need some way to check
* the correct type of umc_dev->parent (so that for example, we can
* cast to pci_dev). Casting to pci_dev is necesary because at some
* point we need to request resources from the device. Mapping is
* easily over come (ioremap and stuff are bus agnostic), but hooking
* up to some error handlers (such as pci error handlers) might need
* this.
*
* THIS might (probably will) be removed in the future, so don't count
* on it.
*/
static inline struct pci_dev *umc_parent_pci_dev(struct umc_dev *umc_dev)
{
struct pci_dev *pci_dev = NULL;
if (umc_dev->dev.parent->bus == &pci_bus_type)
pci_dev = to_pci_dev(umc_dev->dev.parent);
return pci_dev;
}
/**
* umc_dev_get() - reference a UMC device.
* @umc_dev: Pointer to UMC device.
*
* NOTE: we are assuming in this whole scheme that the parent device
* is referenced at _probe() time and unreferenced at _remove()
* time by the parent's subsystem.
*/
static inline struct umc_dev *umc_dev_get(struct umc_dev *umc_dev)
{
get_device(&umc_dev->dev);
return umc_dev;
}
/**
* umc_dev_put() - unreference a UMC device.
* @umc_dev: Pointer to UMC device.
*/
static inline void umc_dev_put(struct umc_dev *umc_dev)
{
put_device(&umc_dev->dev);
}
/**
* umc_set_drvdata - set UMC device's driver data.
* @umc_dev: Pointer to UMC device.
* @data: Data to set.
*/
static inline void umc_set_drvdata(struct umc_dev *umc_dev, void *data)
{
dev_set_drvdata(&umc_dev->dev, data);
}
/**
* umc_get_drvdata - recover UMC device's driver data.
* @umc_dev: Pointer to UMC device.
*/
static inline void *umc_get_drvdata(struct umc_dev *umc_dev)
{
return dev_get_drvdata(&umc_dev->dev);
}
int umc_controller_reset(struct umc_dev *umc);
#endif /* #ifndef _LINUX_UWB_UMC_H_ */
|
