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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 <linux/cdev.h> |
9 | #include <asm/atomic.h> |
10 | |
11 | #include "hosts.h" |
12 | #include "ieee1394_types.h" |
13 | |
14 | struct hpsb_packet { |
15 | /* This struct is basically read-only for hosts with the exception of |
16 | * the data buffer contents and driver_list. */ |
17 | |
18 | /* This can be used for host driver internal linking. |
19 | * |
20 | * NOTE: This must be left in init state when the driver is done |
21 | * with it (e.g. by using list_del_init()), since the core does |
22 | * some sanity checks to make sure the packet is not on a |
23 | * driver_list when free'ing it. */ |
24 | struct list_head driver_list; |
25 | |
26 | nodeid_t node_id; |
27 | |
28 | /* hpsb_raw = send as-is, do not CRC (but still byte-swap it) */ |
29 | enum { hpsb_async, hpsb_raw } __attribute__((packed)) type; |
30 | |
31 | /* Okay, this is core internal and a no care for hosts. |
32 | * queued = queued for sending |
33 | * pending = sent, waiting for response |
34 | * complete = processing completed, successful or not |
35 | */ |
36 | enum { |
37 | hpsb_unused, hpsb_queued, hpsb_pending, hpsb_complete |
38 | } __attribute__((packed)) state; |
39 | |
40 | /* These are core-internal. */ |
41 | signed char tlabel; |
42 | signed char ack_code; |
43 | unsigned char tcode; |
44 | |
45 | unsigned expect_response:1; |
46 | unsigned no_waiter:1; |
47 | |
48 | /* Speed to transmit with: 0 = 100Mbps, 1 = 200Mbps, 2 = 400Mbps */ |
49 | unsigned speed_code:2; |
50 | |
51 | struct hpsb_host *host; |
52 | unsigned int generation; |
53 | |
54 | atomic_t refcnt; |
55 | struct list_head queue; |
56 | |
57 | /* Function (and possible data to pass to it) to call when this |
58 | * packet is completed. */ |
59 | void (*complete_routine)(void *); |
60 | void *complete_data; |
61 | |
62 | /* Store jiffies for implementing bus timeouts. */ |
63 | unsigned long sendtime; |
64 | |
65 | /* Core-internal. */ |
66 | size_t allocated_data_size; /* as allocated */ |
67 | |
68 | /* Sizes are in bytes. To be set by caller of hpsb_alloc_packet. */ |
69 | size_t data_size; /* as filled in */ |
70 | size_t header_size; /* as filled in, not counting the CRC */ |
71 | |
72 | /* Buffers */ |
73 | quadlet_t *data; /* can be DMA-mapped */ |
74 | quadlet_t header[5]; |
75 | quadlet_t embedded_data[0]; /* keep as last member */ |
76 | }; |
77 | |
78 | void hpsb_set_packet_complete_task(struct hpsb_packet *packet, |
79 | void (*routine)(void *), void *data); |
80 | static inline struct hpsb_packet *driver_packet(struct list_head *l) |
81 | { |
82 | return list_entry(l, struct hpsb_packet, driver_list); |
83 | } |
84 | void abort_timedouts(unsigned long __opaque); |
85 | struct hpsb_packet *hpsb_alloc_packet(size_t data_size); |
86 | void hpsb_free_packet(struct hpsb_packet *packet); |
87 | |
88 | /** |
89 | * get_hpsb_generation - generation counter for the complete 1394 subsystem |
90 | * |
91 | * Generation gets incremented on every change in the subsystem (notably on bus |
92 | * resets). Use the functions, not the variable. |
93 | */ |
94 | static inline unsigned int get_hpsb_generation(struct hpsb_host *host) |
95 | { |
96 | return atomic_read(&host->generation); |
97 | } |
98 | |
99 | int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt); |
100 | int hpsb_send_packet(struct hpsb_packet *packet); |
101 | int hpsb_send_packet_and_wait(struct hpsb_packet *packet); |
102 | int hpsb_reset_bus(struct hpsb_host *host, int type); |
103 | int hpsb_read_cycle_timer(struct hpsb_host *host, u32 *cycle_timer, |
104 | u64 *local_time); |
105 | |
106 | int hpsb_bus_reset(struct hpsb_host *host); |
107 | void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid); |
108 | void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot); |
109 | void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet, |
110 | int ackcode); |
111 | void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size, |
112 | int write_acked); |
113 | |
114 | /* |
115 | * CHARACTER DEVICE DISPATCHING |
116 | * |
117 | * All ieee1394 character device drivers share the same major number |
118 | * (major 171). The 256 minor numbers are allocated to the various |
119 | * task-specific interfaces (raw1394, video1394, dv1394, etc) in |
120 | * blocks of 16. |
121 | * |
122 | * The core ieee1394.o module allocates the device number region |
123 | * 171:0-255, the various drivers must then cdev_add() their cdev |
124 | * objects to handle their respective sub-regions. |
125 | * |
126 | * Minor device number block allocations: |
127 | * |
128 | * Block 0 ( 0- 15) raw1394 |
129 | * Block 1 ( 16- 31) video1394 |
130 | * Block 2 ( 32- 47) dv1394 |
131 | * |
132 | * Blocks 3-14 free for future allocation |
133 | * |
134 | * Block 15 (240-255) reserved for drivers under development, etc. |
135 | */ |
136 | |
137 | #define IEEE1394_MAJOR 171 |
138 | |
139 | #define IEEE1394_MINOR_BLOCK_RAW1394 0 |
140 | #define IEEE1394_MINOR_BLOCK_VIDEO1394 1 |
141 | #define IEEE1394_MINOR_BLOCK_DV1394 2 |
142 | #define IEEE1394_MINOR_BLOCK_EXPERIMENTAL 15 |
143 | |
144 | #define IEEE1394_CORE_DEV MKDEV(IEEE1394_MAJOR, 0) |
145 | #define IEEE1394_RAW1394_DEV MKDEV(IEEE1394_MAJOR, \ |
146 | IEEE1394_MINOR_BLOCK_RAW1394 * 16) |
147 | #define IEEE1394_VIDEO1394_DEV MKDEV(IEEE1394_MAJOR, \ |
148 | IEEE1394_MINOR_BLOCK_VIDEO1394 * 16) |
149 | #define IEEE1394_DV1394_DEV MKDEV(IEEE1394_MAJOR, \ |
150 | IEEE1394_MINOR_BLOCK_DV1394 * 16) |
151 | #define IEEE1394_EXPERIMENTAL_DEV MKDEV(IEEE1394_MAJOR, \ |
152 | IEEE1394_MINOR_BLOCK_EXPERIMENTAL * 16) |
153 | |
154 | /** |
155 | * ieee1394_file_to_instance - get the index within a minor number block |
156 | */ |
157 | static inline unsigned char ieee1394_file_to_instance(struct file *file) |
158 | { |
159 | int idx = cdev_index(file->f_path.dentry->d_inode); |
160 | if (idx < 0) |
161 | idx = 0; |
162 | return idx; |
163 | } |
164 | |
165 | extern int hpsb_disable_irm; |
166 | |
167 | /* Our sysfs bus entry */ |
168 | extern struct bus_type ieee1394_bus_type; |
169 | extern struct class hpsb_host_class; |
170 | extern struct class *hpsb_protocol_class; |
171 | |
172 | #endif /* _IEEE1394_CORE_H */ |
173 |
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