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Diffstat (limited to 'drivers/firewire/fw-device.h')
-rw-r--r--drivers/firewire/fw-device.h202
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diff --git a/drivers/firewire/fw-device.h b/drivers/firewire/fw-device.h
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1/*
2 * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19#ifndef __fw_device_h
20#define __fw_device_h
21
22#include <linux/device.h>
23#include <linux/fs.h>
24#include <linux/idr.h>
25#include <linux/kernel.h>
26#include <linux/list.h>
27#include <linux/mutex.h>
28#include <linux/rwsem.h>
29#include <linux/sysfs.h>
30#include <linux/types.h>
31#include <linux/workqueue.h>
32
33#include <asm/atomic.h>
34
35enum fw_device_state {
36 FW_DEVICE_INITIALIZING,
37 FW_DEVICE_RUNNING,
38 FW_DEVICE_GONE,
39 FW_DEVICE_SHUTDOWN,
40};
41
42struct fw_attribute_group {
43 struct attribute_group *groups[2];
44 struct attribute_group group;
45 struct attribute *attrs[11];
46};
47
48struct fw_node;
49struct fw_card;
50
51/*
52 * Note, fw_device.generation always has to be read before fw_device.node_id.
53 * Use SMP memory barriers to ensure this. Otherwise requests will be sent
54 * to an outdated node_id if the generation was updated in the meantime due
55 * to a bus reset.
56 *
57 * Likewise, fw-core will take care to update .node_id before .generation so
58 * that whenever fw_device.generation is current WRT the actual bus generation,
59 * fw_device.node_id is guaranteed to be current too.
60 *
61 * The same applies to fw_device.card->node_id vs. fw_device.generation.
62 *
63 * fw_device.config_rom and fw_device.config_rom_length may be accessed during
64 * the lifetime of any fw_unit belonging to the fw_device, before device_del()
65 * was called on the last fw_unit. Alternatively, they may be accessed while
66 * holding fw_device_rwsem.
67 */
68struct fw_device {
69 atomic_t state;
70 struct fw_node *node;
71 int node_id;
72 int generation;
73 unsigned max_speed;
74 struct fw_card *card;
75 struct device device;
76
77 struct mutex client_list_mutex;
78 struct list_head client_list;
79
80 u32 *config_rom;
81 size_t config_rom_length;
82 int config_rom_retries;
83 unsigned cmc:1;
84 unsigned bc_implemented:2;
85
86 struct delayed_work work;
87 struct fw_attribute_group attribute_group;
88};
89
90static inline struct fw_device *fw_device(struct device *dev)
91{
92 return container_of(dev, struct fw_device, device);
93}
94
95static inline int fw_device_is_shutdown(struct fw_device *device)
96{
97 return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
98}
99
100static inline struct fw_device *fw_device_get(struct fw_device *device)
101{
102 get_device(&device->device);
103
104 return device;
105}
106
107static inline void fw_device_put(struct fw_device *device)
108{
109 put_device(&device->device);
110}
111
112struct fw_device *fw_device_get_by_devt(dev_t devt);
113int fw_device_enable_phys_dma(struct fw_device *device);
114void fw_device_set_broadcast_channel(struct fw_device *device, int generation);
115
116void fw_device_cdev_update(struct fw_device *device);
117void fw_device_cdev_remove(struct fw_device *device);
118
119extern struct rw_semaphore fw_device_rwsem;
120extern struct idr fw_device_idr;
121extern int fw_cdev_major;
122
123/*
124 * fw_unit.directory must not be accessed after device_del(&fw_unit.device).
125 */
126struct fw_unit {
127 struct device device;
128 u32 *directory;
129 struct fw_attribute_group attribute_group;
130};
131
132static inline struct fw_unit *fw_unit(struct device *dev)
133{
134 return container_of(dev, struct fw_unit, device);
135}
136
137static inline struct fw_unit *fw_unit_get(struct fw_unit *unit)
138{
139 get_device(&unit->device);
140
141 return unit;
142}
143
144static inline void fw_unit_put(struct fw_unit *unit)
145{
146 put_device(&unit->device);
147}
148
149#define CSR_OFFSET 0x40
150#define CSR_LEAF 0x80
151#define CSR_DIRECTORY 0xc0
152
153#define CSR_DESCRIPTOR 0x01
154#define CSR_VENDOR 0x03
155#define CSR_HARDWARE_VERSION 0x04
156#define CSR_NODE_CAPABILITIES 0x0c
157#define CSR_UNIT 0x11
158#define CSR_SPECIFIER_ID 0x12
159#define CSR_VERSION 0x13
160#define CSR_DEPENDENT_INFO 0x14
161#define CSR_MODEL 0x17
162#define CSR_INSTANCE 0x18
163#define CSR_DIRECTORY_ID 0x20
164
165struct fw_csr_iterator {
166 u32 *p;
167 u32 *end;
168};
169
170void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 *p);
171int fw_csr_iterator_next(struct fw_csr_iterator *ci,
172 int *key, int *value);
173
174#define FW_MATCH_VENDOR 0x0001
175#define FW_MATCH_MODEL 0x0002
176#define FW_MATCH_SPECIFIER_ID 0x0004
177#define FW_MATCH_VERSION 0x0008
178
179struct fw_device_id {
180 u32 match_flags;
181 u32 vendor;
182 u32 model;
183 u32 specifier_id;
184 u32 version;
185 void *driver_data;
186};
187
188struct fw_driver {
189 struct device_driver driver;
190 /* Called when the parent device sits through a bus reset. */
191 void (*update) (struct fw_unit *unit);
192 const struct fw_device_id *id_table;
193};
194
195static inline struct fw_driver *fw_driver(struct device_driver *drv)
196{
197 return container_of(drv, struct fw_driver, driver);
198}
199
200extern const struct file_operations fw_device_ops;
201
202#endif /* __fw_device_h */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-24 12:45:14 -0500