summaryrefslogtreecommitdiff
path: root/drivers/ieee1394/ieee1394_core.h
blob: 11fd324ee045c150a5a647e9f10024410bba9f1c (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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
#ifndef _IEEE1394_CORE_H
#define _IEEE1394_CORE_H

#include <linux/device.h>
#include <linux/fs.h>
#include <linux/list.h>
#include <linux/types.h>
#include <asm/atomic.h>

#include "hosts.h"
#include "ieee1394_types.h"

struct hpsb_packet {
	/* This struct is basically read-only for hosts with the exception of
	 * the data buffer contents and driver_list. */

	/* This can be used for host driver internal linking.
	 *
	 * NOTE: This must be left in init state when the driver is done
	 * with it (e.g. by using list_del_init()), since the core does
	 * some sanity checks to make sure the packet is not on a
	 * driver_list when free'ing it. */
	struct list_head driver_list;

	nodeid_t node_id;

	/* Async and Iso types should be clear, raw means send-as-is, do not
	 * CRC!  Byte swapping shall still be done in this case. */
	enum { hpsb_async, hpsb_iso, hpsb_raw } __attribute__((packed)) type;

	/* Okay, this is core internal and a no care for hosts.
	 * queued   = queued for sending
	 * pending  = sent, waiting for response
	 * complete = processing completed, successful or not
	 */
	enum {
		hpsb_unused, hpsb_queued, hpsb_pending, hpsb_complete
	} __attribute__((packed)) state;

	/* These are core-internal. */
	signed char tlabel;
	signed char ack_code;
	unsigned char tcode;

	unsigned expect_response:1;
	unsigned no_waiter:1;

	/* Speed to transmit with: 0 = 100Mbps, 1 = 200Mbps, 2 = 400Mbps */
	unsigned speed_code:2;

	struct hpsb_host *host;
	unsigned int generation;

	atomic_t refcnt;
	struct list_head queue;

	/* Function (and possible data to pass to it) to call when this
	 * packet is completed.  */
	void (*complete_routine)(void *);
	void *complete_data;

	/* Store jiffies for implementing bus timeouts. */
	unsigned long sendtime;

	/* Core-internal.  */
	size_t allocated_data_size;	/* as allocated */

	/* Sizes are in bytes. To be set by caller of hpsb_alloc_packet. */
	size_t data_size;		/* as filled in */
	size_t header_size;		/* as filled in, not counting the CRC */

	/* Buffers */
	quadlet_t *data;		/* can be DMA-mapped */
	quadlet_t header[5];
	quadlet_t embedded_data[0];	/* keep as last member */
};

void hpsb_set_packet_complete_task(struct hpsb_packet *packet,
				   void (*routine)(void *), void *data);
static inline struct hpsb_packet *driver_packet(struct list_head *l)
{
	return list_entry(l, struct hpsb_packet, driver_list);
}
void abort_timedouts(unsigned long __opaque);
struct hpsb_packet *hpsb_alloc_packet(size_t data_size);
void hpsb_free_packet(struct hpsb_packet *packet);

/**
 * get_hpsb_generation - generation counter for the complete 1394 subsystem
 *
 * Generation gets incremented on every change in the subsystem (notably on bus
 * resets). Use the functions, not the variable.
 */
static inline unsigned int get_hpsb_generation(struct hpsb_host *host)
{
	return atomic_read(&host->generation);
}

int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt);
int hpsb_send_packet(struct hpsb_packet *packet);
int hpsb_send_packet_and_wait(struct hpsb_packet *packet);
int hpsb_reset_bus(struct hpsb_host *host, int type);
int hpsb_read_cycle_timer(struct hpsb_host *host, u32 *cycle_timer,
			  u64 *local_time);

int hpsb_bus_reset(struct hpsb_host *host);
void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid);
void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot);
void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
		      int ackcode);
void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
			  int write_acked);

/*
 * CHARACTER DEVICE DISPATCHING
 *
 * All ieee1394 character device drivers share the same major number
 * (major 171).  The 256 minor numbers are allocated to the various
 * task-specific interfaces (raw1394, video1394, dv1394, etc) in
 * blocks of 16.
 *
 * The core ieee1394.o module allocates the device number region
 * 171:0-255, the various drivers must then cdev_add() their cdev
 * objects to handle their respective sub-regions.
 *
 * Minor device number block allocations:
 *
 * Block 0  (  0- 15)  raw1394
 * Block 1  ( 16- 31)  video1394
 * Block 2  ( 32- 47)  dv1394
 *
 * Blocks 3-14 free for future allocation
 *
 * Block 15 (240-255)  reserved for drivers under development, etc.
 */

#define IEEE1394_MAJOR			 171

#define IEEE1394_MINOR_BLOCK_RAW1394	   0
#define IEEE1394_MINOR_BLOCK_VIDEO1394	   1
#define IEEE1394_MINOR_BLOCK_DV1394	   2
#define IEEE1394_MINOR_BLOCK_EXPERIMENTAL 15

#define IEEE1394_CORE_DEV	  MKDEV(IEEE1394_MAJOR, 0)
#define IEEE1394_RAW1394_DEV	  MKDEV(IEEE1394_MAJOR, \
					IEEE1394_MINOR_BLOCK_RAW1394 * 16)
#define IEEE1394_VIDEO1394_DEV	  MKDEV(IEEE1394_MAJOR, \
					IEEE1394_MINOR_BLOCK_VIDEO1394 * 16)
#define IEEE1394_DV1394_DEV	  MKDEV(IEEE1394_MAJOR, \
					IEEE1394_MINOR_BLOCK_DV1394 * 16)
#define IEEE1394_EXPERIMENTAL_DEV MKDEV(IEEE1394_MAJOR, \
					IEEE1394_MINOR_BLOCK_EXPERIMENTAL * 16)

/**
 * ieee1394_file_to_instance - get the index within a minor number block
 */
static inline unsigned char ieee1394_file_to_instance(struct file *file)
{
	return file->f_path.dentry->d_inode->i_cindex;
}

extern int hpsb_disable_irm;

/* Our sysfs bus entry */
extern struct bus_type ieee1394_bus_type;
extern struct class hpsb_host_class;
extern struct class *hpsb_protocol_class;

#endif /* _IEEE1394_CORE_H */