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1/*
2 * ACPI PCI Hot Plug Controller Driver
3 *
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
7 * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
8 * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
9 * Copyright (C) 2002,2003 NEC Corporation
10 * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
11 * Copyright (C) 2003-2005 Hewlett Packard
12 *
13 * All rights reserved.
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or (at
18 * your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful, but
21 * WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
23 * NON INFRINGEMENT. See the GNU General Public License for more
24 * details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 *
30 * Send feedback to <gregkh@us.ibm.com>,
31 * <t-kochi@bq.jp.nec.com>
32 *
33 */
34
35#ifndef _ACPIPHP_H
36#define _ACPIPHP_H
37
38#include <linux/acpi.h>
39#include <linux/mutex.h>
40#include <linux/pci_hotplug.h>
41
42#define dbg(format, arg...) \
43 do { \
44 if (acpiphp_debug) \
45 printk(KERN_DEBUG "%s: " format, \
46 MY_NAME , ## arg); \
47 } while (0)
48#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
49#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
50#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
51
52struct acpiphp_context;
53struct acpiphp_bridge;
54struct acpiphp_slot;
55
56/*
57 * struct slot - slot information for each *physical* slot
58 */
59struct slot {
60 struct hotplug_slot *hotplug_slot;
61 struct acpiphp_slot *acpi_slot;
62 struct hotplug_slot_info info;
63 unsigned int sun; /* ACPI _SUN (Slot User Number) value */
64};
65
66static inline const char *slot_name(struct slot *slot)
67{
68 return hotplug_slot_name(slot->hotplug_slot);
69}
70
71/*
72 * struct acpiphp_bridge - PCI bridge information
73 *
74 * for each bridge device in ACPI namespace
75 */
76struct acpiphp_bridge {
77 struct list_head list;
78 struct list_head slots;
79 struct kref ref;
80
81 struct acpiphp_context *context;
82
83 int nr_slots;
84
85 /* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */
86 struct pci_bus *pci_bus;
87
88 /* PCI-to-PCI bridge device */
89 struct pci_dev *pci_dev;
90};
91
92
93/*
94 * struct acpiphp_slot - PCI slot information
95 *
96 * PCI slot information for each *physical* PCI slot
97 */
98struct acpiphp_slot {
99 struct list_head node;
100 struct pci_bus *bus;
101 struct list_head funcs; /* one slot may have different
102 objects (i.e. for each function) */
103 struct slot *slot;
104 struct mutex crit_sect;
105
106 u8 device; /* pci device# */
107 u32 flags; /* see below */
108};
109
110
111/*
112 * struct acpiphp_func - PCI function information
113 *
114 * PCI function information for each object in ACPI namespace
115 * typically 8 objects per slot (i.e. for each PCI function)
116 */
117struct acpiphp_func {
118 struct acpiphp_bridge *parent;
119 struct acpiphp_slot *slot;
120
121 struct list_head sibling;
122
123 u8 function; /* pci function# */
124 u32 flags; /* see below */
125};
126
127struct acpiphp_context {
128 acpi_handle handle;
129 struct acpiphp_func func;
130 struct acpiphp_bridge *bridge;
131 unsigned int refcount;
132};
133
134static inline struct acpiphp_context *func_to_context(struct acpiphp_func *func)
135{
136 return container_of(func, struct acpiphp_context, func);
137}
138
139static inline acpi_handle func_to_handle(struct acpiphp_func *func)
140{
141 return func_to_context(func)->handle;
142}
143
144/*
145 * struct acpiphp_attention_info - device specific attention registration
146 *
147 * ACPI has no generic method of setting/getting attention status
148 * this allows for device specific driver registration
149 */
150struct acpiphp_attention_info
151{
152 int (*set_attn)(struct hotplug_slot *slot, u8 status);
153 int (*get_attn)(struct hotplug_slot *slot, u8 *status);
154 struct module *owner;
155};
156
157/* ACPI _STA method value (ignore bit 4; battery present) */
158#define ACPI_STA_ALL (0x0000000f)
159
160/* slot flags */
161
162#define SLOT_ENABLED (0x00000001)
163
164/* function flags */
165
166#define FUNC_HAS_STA (0x00000001)
167#define FUNC_HAS_EJ0 (0x00000002)
168#define FUNC_HAS_DCK (0x00000004)
169
170/* function prototypes */
171
172/* acpiphp_core.c */
173int acpiphp_register_attention(struct acpiphp_attention_info*info);
174int acpiphp_unregister_attention(struct acpiphp_attention_info *info);
175int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot, unsigned int sun);
176void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);
177
178/* acpiphp_glue.c */
179typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
180
181int acpiphp_enable_slot(struct acpiphp_slot *slot);
182int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot);
183u8 acpiphp_get_power_status(struct acpiphp_slot *slot);
184u8 acpiphp_get_attention_status(struct acpiphp_slot *slot);
185u8 acpiphp_get_latch_status(struct acpiphp_slot *slot);
186u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot);
187
188/* variables */
189extern bool acpiphp_debug;
190extern bool acpiphp_disabled;
191
192#endif /* _ACPIPHP_H */