tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/fs.h>
23#include <linux/cdev.h>
24#include <asm/atomic.h>
25
26enum fw_device_state {
27 FW_DEVICE_INITIALIZING,
28 FW_DEVICE_RUNNING,
29 FW_DEVICE_SHUTDOWN,
30};
31
32struct fw_attribute_group {
33 struct attribute_group *groups[2];
34 struct attribute_group group;
35 struct attribute *attrs[11];
36};
37
38/*
39 * Note, fw_device.generation always has to be read before fw_device.node_id.
40 * Use SMP memory barriers to ensure this. Otherwise requests will be sent
41 * to an outdated node_id if the generation was updated in the meantime due
42 * to a bus reset.
43 *
44 * Likewise, fw-core will take care to update .node_id before .generation so
45 * that whenever fw_device.generation is current WRT the actual bus generation,
46 * fw_device.node_id is guaranteed to be current too.
47 *
48 * The same applies to fw_device.card->node_id vs. fw_device.generation.
49 */
50struct fw_device {
51 atomic_t state;
52 struct fw_node *node;
53 int node_id;
54 int generation;
55 unsigned max_speed;
56 struct fw_card *card;
57 struct device device;
58 struct list_head link;
59 struct list_head client_list;
60 u32 *config_rom;
61 size_t config_rom_length;
62 int config_rom_retries;
63 struct delayed_work work;
64 struct fw_attribute_group attribute_group;
65};
66
67static inline struct fw_device *
68fw_device(struct device *dev)
69{
70 return container_of(dev, struct fw_device, device);
71}
72
73static inline int
74fw_device_is_shutdown(struct fw_device *device)
75{
76 return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
77}
78
79static inline struct fw_device *
80fw_device_get(struct fw_device *device)
81{
82 get_device(&device->device);
83
84 return device;
85}
86
87static inline void
88fw_device_put(struct fw_device *device)
89{
90 put_device(&device->device);
91}
92
93struct fw_device *fw_device_get_by_devt(dev_t devt);
94int fw_device_enable_phys_dma(struct fw_device *device);
95
96void fw_device_cdev_update(struct fw_device *device);
97void fw_device_cdev_remove(struct fw_device *device);
98
99extern int fw_cdev_major;
100
101struct fw_unit {
102 struct device device;
103 u32 *directory;
104 struct fw_attribute_group attribute_group;
105};
106
107static inline struct fw_unit *
108fw_unit(struct device *dev)
109{
110 return container_of(dev, struct fw_unit, device);
111}
112
113#define CSR_OFFSET 0x40
114#define CSR_LEAF 0x80
115#define CSR_DIRECTORY 0xc0
116
117#define CSR_DESCRIPTOR 0x01
118#define CSR_VENDOR 0x03
119#define CSR_HARDWARE_VERSION 0x04
120#define CSR_NODE_CAPABILITIES 0x0c
121#define CSR_UNIT 0x11
122#define CSR_SPECIFIER_ID 0x12
123#define CSR_VERSION 0x13
124#define CSR_DEPENDENT_INFO 0x14
125#define CSR_MODEL 0x17
126#define CSR_INSTANCE 0x18
127#define CSR_DIRECTORY_ID 0x20
128
129struct fw_csr_iterator {
130 u32 *p;
131 u32 *end;
132};
133
134void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 *p);
135int fw_csr_iterator_next(struct fw_csr_iterator *ci,
136 int *key, int *value);
137
138#define FW_MATCH_VENDOR 0x0001
139#define FW_MATCH_MODEL 0x0002
140#define FW_MATCH_SPECIFIER_ID 0x0004
141#define FW_MATCH_VERSION 0x0008
142
143struct fw_device_id {
144 u32 match_flags;
145 u32 vendor;
146 u32 model;
147 u32 specifier_id;
148 u32 version;
149 void *driver_data;
150};
151
152struct fw_driver {
153 struct device_driver driver;
154 /* Called when the parent device sits through a bus reset. */
155 void (*update) (struct fw_unit *unit);
156 const struct fw_device_id *id_table;
157};
158
159static inline struct fw_driver *
160fw_driver(struct device_driver *drv)
161{
162 return container_of(drv, struct fw_driver, driver);
163}
164
165extern const struct file_operations fw_device_ops;
166
167#endif /* __fw_device_h */