1 #ifndef _IEEE1394_CORE_H
2 #define _IEEE1394_CORE_H
3
4 #include <linux/device.h>
5 #include <linux/fs.h>
6 #include <linux/list.h>
7 #include <linux/types.h>
8 #include <asm/atomic.h>
9
10 #include "hosts.h"
11 #include "ieee1394_types.h"
12
13 struct hpsb_packet {
14 /* This struct is basically read-only for hosts with the exception of
15 * the data buffer contents and driver_list. */
16
17 /* This can be used for host driver internal linking.
18 *
19 * NOTE: This must be left in init state when the driver is done
20 * with it (e.g. by using list_del_init()), since the core does
21 * some sanity checks to make sure the packet is not on a
22 * driver_list when free'ing it. */
23 struct list_head driver_list;
24
25 nodeid_t node_id;
26
27 /* hpsb_raw = send as-is, do not CRC (but still byte-swap it) */
28 enum { hpsb_async, hpsb_raw } __attribute__((packed)) type;
29
30 /* Okay, this is core internal and a no care for hosts.
31 * queued = queued for sending
32 * pending = sent, waiting for response
33 * complete = processing completed, successful or not
34 */
35 enum {
36 hpsb_unused, hpsb_queued, hpsb_pending, hpsb_complete
37 } __attribute__((packed)) state;
38
39 /* These are core-internal. */
40 signed char tlabel;
41 signed char ack_code;
42 unsigned char tcode;
43
44 unsigned expect_response:1;
45 unsigned no_waiter:1;
46
47 /* Speed to transmit with: 0 = 100Mbps, 1 = 200Mbps, 2 = 400Mbps */
48 unsigned speed_code:2;
49
50 struct hpsb_host *host;
51 unsigned int generation;
52
53 atomic_t refcnt;
54 struct list_head queue;
55
56 /* Function (and possible data to pass to it) to call when this
57 * packet is completed. */
58 void (*complete_routine)(void *);
59 void *complete_data;
60
61 /* Store jiffies for implementing bus timeouts. */
62 unsigned long sendtime;
63
64 /* Core-internal. */
65 size_t allocated_data_size; /* as allocated */
66
67 /* Sizes are in bytes. To be set by caller of hpsb_alloc_packet. */
68 size_t data_size; /* as filled in */
69 size_t header_size; /* as filled in, not counting the CRC */
70
71 /* Buffers */
72 quadlet_t *data; /* can be DMA-mapped */
73 quadlet_t header[5];
74 quadlet_t embedded_data[0]; /* keep as last member */
75 };
76
77 void hpsb_set_packet_complete_task(struct hpsb_packet *packet,
78 void (*routine)(void *), void *data);
79 static inline struct hpsb_packet *driver_packet(struct list_head *l)
80 {
81 return list_entry(l, struct hpsb_packet, driver_list);
82 }
83 void abort_timedouts(unsigned long __opaque);
84 struct hpsb_packet *hpsb_alloc_packet(size_t data_size);
85 void hpsb_free_packet(struct hpsb_packet *packet);
86
87 /**
88 * get_hpsb_generation - generation counter for the complete 1394 subsystem
89 *
90 * Generation gets incremented on every change in the subsystem (notably on bus
91 * resets). Use the functions, not the variable.
92 */
93 static inline unsigned int get_hpsb_generation(struct hpsb_host *host)
94 {
95 return atomic_read(&host->generation);
96 }
97
98 int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt);
99 int hpsb_send_packet(struct hpsb_packet *packet);
100 int hpsb_send_packet_and_wait(struct hpsb_packet *packet);
101 int hpsb_reset_bus(struct hpsb_host *host, int type);
102 int hpsb_read_cycle_timer(struct hpsb_host *host, u32 *cycle_timer,
103 u64 *local_time);
104
105 int hpsb_bus_reset(struct hpsb_host *host);
106 void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid);
107 void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot);
108 void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
109 int ackcode);
110 void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
111 int write_acked);
112
113 /*
114 * CHARACTER DEVICE DISPATCHING
115 *
116 * All ieee1394 character device drivers share the same major number
117 * (major 171). The 256 minor numbers are allocated to the various
118 * task-specific interfaces (raw1394, video1394, dv1394, etc) in
119 * blocks of 16.
120 *
121 * The core ieee1394.o module allocates the device number region
122 * 171:0-255, the various drivers must then cdev_add() their cdev
123 * objects to handle their respective sub-regions.
124 *
125 * Minor device number block allocations:
126 *
127 * Block 0 ( 0- 15) raw1394
128 * Block 1 ( 16- 31) video1394
129 * Block 2 ( 32- 47) dv1394
130 *
131 * Blocks 3-14 free for future allocation
132 *
133 * Block 15 (240-255) reserved for drivers under development, etc.
134 */
135
136 #define IEEE1394_MAJOR 171
137
138 #define IEEE1394_MINOR_BLOCK_RAW1394 0
139 #define IEEE1394_MINOR_BLOCK_VIDEO1394 1
140 #define IEEE1394_MINOR_BLOCK_DV1394 2
141 #define IEEE1394_MINOR_BLOCK_EXPERIMENTAL 15
142
143 #define IEEE1394_CORE_DEV MKDEV(IEEE1394_MAJOR, 0)
144 #define IEEE1394_RAW1394_DEV MKDEV(IEEE1394_MAJOR, \
145 IEEE1394_MINOR_BLOCK_RAW1394 * 16)
146 #define IEEE1394_VIDEO1394_DEV MKDEV(IEEE1394_MAJOR, \
147 IEEE1394_MINOR_BLOCK_VIDEO1394 * 16)
148 #define IEEE1394_DV1394_DEV MKDEV(IEEE1394_MAJOR, \
149 IEEE1394_MINOR_BLOCK_DV1394 * 16)
150 #define IEEE1394_EXPERIMENTAL_DEV MKDEV(IEEE1394_MAJOR, \
151 IEEE1394_MINOR_BLOCK_EXPERIMENTAL * 16)
152
153 /**
154 * ieee1394_file_to_instance - get the index within a minor number block
155 */
156 static inline unsigned char ieee1394_file_to_instance(struct file *file)
157 {
158 return file->f_path.dentry->d_inode->i_cindex;
159 }
160
161 extern int hpsb_disable_irm;
162
163 /* Our sysfs bus entry */
164 extern struct bus_type ieee1394_bus_type;
165 extern struct class hpsb_host_class;
166 extern struct class *hpsb_protocol_class;
167
168 #endif /* _IEEE1394_CORE_H */
169
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