aboutsummaryrefslogtreecommitdiff
path: root/drivers/firewire/fw-device.h
blob: 43808c02793e27682892da07ecfd1f5750a396e4 (plain)
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
/*
 * Copyright (C) 2005-2006  Kristian Hoegsberg <krh@bitplanet.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef __fw_device_h
#define __fw_device_h

#include <linux/fs.h>
#include <linux/cdev.h>
#include <asm/atomic.h>

enum fw_device_state {
	FW_DEVICE_INITIALIZING,
	FW_DEVICE_RUNNING,
	FW_DEVICE_SHUTDOWN,
};

struct fw_attribute_group {
	struct attribute_group *groups[2];
	struct attribute_group group;
	struct attribute *attrs[11];
};

/*
 * Note, fw_device.generation always has to be read before fw_device.node_id.
 * Use SMP memory barriers to ensure this.  Otherwise requests will be sent
 * to an outdated node_id if the generation was updated in the meantime due
 * to a bus reset.
 *
 * Likewise, fw-core will take care to update .node_id before .generation so
 * that whenever fw_device.generation is current WRT the actual bus generation,
 * fw_device.node_id is guaranteed to be current too.
 *
 * The same applies to fw_device.card->node_id vs. fw_device.generation.
 */
struct fw_device {
	atomic_t state;
	struct fw_node *node;
	int node_id;
	int generation;
	unsigned max_speed;
	struct fw_card *card;
	struct device device;
	struct list_head link;
	struct list_head client_list;
	u32 *config_rom;
	size_t config_rom_length;
	int config_rom_retries;
	struct delayed_work work;
	struct fw_attribute_group attribute_group;
};

static inline struct fw_device *
fw_device(struct device *dev)
{
	return container_of(dev, struct fw_device, device);
}

static inline int
fw_device_is_shutdown(struct fw_device *device)
{
	return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
}

struct fw_device *fw_device_get(struct fw_device *device);
struct fw_device *fw_device_get_by_devt(dev_t devt);
void fw_device_put(struct fw_device *device);
int fw_device_enable_phys_dma(struct fw_device *device);

void fw_device_cdev_update(struct fw_device *device);
void fw_device_cdev_remove(struct fw_device *device);

extern int fw_cdev_major;

struct fw_unit {
	struct device device;
	u32 *directory;
	struct fw_attribute_group attribute_group;
};

static inline struct fw_unit *
fw_unit(struct device *dev)
{
	return container_of(dev, struct fw_unit, device);
}

#define CSR_OFFSET	0x40
#define CSR_LEAF	0x80
#define CSR_DIRECTORY	0xc0

#define CSR_DESCRIPTOR		0x01
#define CSR_VENDOR		0x03
#define CSR_HARDWARE_VERSION	0x04
#define CSR_NODE_CAPABILITIES	0x0c
#define CSR_UNIT		0x11
#define CSR_SPECIFIER_ID	0x12
#define CSR_VERSION		0x13
#define CSR_DEPENDENT_INFO	0x14
#define CSR_MODEL		0x17
#define CSR_INSTANCE		0x18
#define CSR_DIRECTORY_ID	0x20

struct fw_csr_iterator {
	u32 *p;
	u32 *end;
};

void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 *p);
int fw_csr_iterator_next(struct fw_csr_iterator *ci,
			 int *key, int *value);

#define FW_MATCH_VENDOR		0x0001
#define FW_MATCH_MODEL		0x0002
#define FW_MATCH_SPECIFIER_ID	0x0004
#define FW_MATCH_VERSION	0x0008

struct fw_device_id {
	u32 match_flags;
	u32 vendor;
	u32 model;
	u32 specifier_id;
	u32 version;
	void *driver_data;
};

struct fw_driver {
	struct device_driver driver;
	/* Called when the parent device sits through a bus reset. */
	void (*update) (struct fw_unit *unit);
	const struct fw_device_id *id_table;
};

static inline struct fw_driver *
fw_driver(struct device_driver *drv)
{
	return container_of(drv, struct fw_driver, driver);
}

extern const struct file_operations fw_device_ops;

#endif /* __fw_device_h */