1 #ifndef _IEEE1394_CORE_H
2 #define _IEEE1394_CORE_H
4 #include <linux/device.h>
6 #include <linux/list.h>
7 #include <linux/skbuff.h>
8 #include <linux/types.h>
9 #include <asm/atomic.h>
12 #include "ieee1394_types.h"
15 /* This struct is basically read-only for hosts with the exception of
16 * the data buffer contents and xnext - see below. */
18 /* This can be used for host driver internal linking.
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;
28 /* Async and Iso types should be clear, raw means send-as-is, do not
29 * CRC! Byte swapping shall still be done in this case. */
30 enum { hpsb_async, hpsb_iso, hpsb_raw } __attribute__((packed)) type;
32 /* Okay, this is core internal and a no care for hosts.
33 * queued = queued for sending
34 * pending = sent, waiting for response
35 * complete = processing completed, successful or not
38 hpsb_unused, hpsb_queued, hpsb_pending, hpsb_complete
39 } __attribute__((packed)) state;
41 /* These are core internal. */
46 unsigned expect_response:1;
49 /* Speed to transmit with: 0 = 100Mbps, 1 = 200Mbps, 2 = 400Mbps */
50 unsigned speed_code:2;
53 * *header and *data are guaranteed to be 32-bit DMAable and may be
54 * overwritten to allow in-place byte swapping. Neither of these is
55 * CRCed (the sizes also don't include CRC), but contain space for at
56 * least one additional quadlet to allow in-place CRCing. The memory is
57 * also guaranteed to be DMA mappable.
64 struct hpsb_host *host;
65 unsigned int generation;
69 /* Function (and possible data to pass to it) to call when this
70 * packet is completed. */
71 void (*complete_routine)(void *);
74 /* XXX This is just a hack at the moment */
77 /* Store jiffies for implementing bus timeouts. */
78 unsigned long sendtime;
80 quadlet_t embedded_header[5];
83 void hpsb_set_packet_complete_task(struct hpsb_packet *packet,
84 void (*routine)(void *), void *data);
85 static inline struct hpsb_packet *driver_packet(struct list_head *l)
87 return list_entry(l, struct hpsb_packet, driver_list);
89 void abort_timedouts(unsigned long __opaque);
90 struct hpsb_packet *hpsb_alloc_packet(size_t data_size);
91 void hpsb_free_packet(struct hpsb_packet *packet);
94 * get_hpsb_generation - generation counter for the complete 1394 subsystem
96 * Generation gets incremented on every change in the subsystem (notably on bus
97 * resets). Use the functions, not the variable.
99 static inline unsigned int get_hpsb_generation(struct hpsb_host *host)
101 return atomic_read(&host->generation);
104 int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt);
105 int hpsb_send_packet(struct hpsb_packet *packet);
106 int hpsb_send_packet_and_wait(struct hpsb_packet *packet);
107 int hpsb_reset_bus(struct hpsb_host *host, int type);
108 int hpsb_read_cycle_timer(struct hpsb_host *host, u32 *cycle_timer,
111 int hpsb_bus_reset(struct hpsb_host *host);
112 void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid);
113 void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot);
114 void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
116 void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
120 * CHARACTER DEVICE DISPATCHING
122 * All ieee1394 character device drivers share the same major number
123 * (major 171). The 256 minor numbers are allocated to the various
124 * task-specific interfaces (raw1394, video1394, dv1394, etc) in
127 * The core ieee1394.o module allocates the device number region
128 * 171:0-255, the various drivers must then cdev_add() their cdev
129 * objects to handle their respective sub-regions.
131 * Minor device number block allocations:
133 * Block 0 ( 0- 15) raw1394
134 * Block 1 ( 16- 31) video1394
135 * Block 2 ( 32- 47) dv1394
137 * Blocks 3-14 free for future allocation
139 * Block 15 (240-255) reserved for drivers under development, etc.
142 #define IEEE1394_MAJOR 171
144 #define IEEE1394_MINOR_BLOCK_RAW1394 0
145 #define IEEE1394_MINOR_BLOCK_VIDEO1394 1
146 #define IEEE1394_MINOR_BLOCK_DV1394 2
147 #define IEEE1394_MINOR_BLOCK_EXPERIMENTAL 15
149 #define IEEE1394_CORE_DEV MKDEV(IEEE1394_MAJOR, 0)
150 #define IEEE1394_RAW1394_DEV MKDEV(IEEE1394_MAJOR, \
151 IEEE1394_MINOR_BLOCK_RAW1394 * 16)
152 #define IEEE1394_VIDEO1394_DEV MKDEV(IEEE1394_MAJOR, \
153 IEEE1394_MINOR_BLOCK_VIDEO1394 * 16)
154 #define IEEE1394_DV1394_DEV MKDEV(IEEE1394_MAJOR, \
155 IEEE1394_MINOR_BLOCK_DV1394 * 16)
156 #define IEEE1394_EXPERIMENTAL_DEV MKDEV(IEEE1394_MAJOR, \
157 IEEE1394_MINOR_BLOCK_EXPERIMENTAL * 16)
160 * ieee1394_file_to_instance - get the index within a minor number block
162 static inline unsigned char ieee1394_file_to_instance(struct file *file)
164 return file->f_path.dentry->d_inode->i_cindex;
167 extern int hpsb_disable_irm;
169 /* Our sysfs bus entry */
170 extern struct bus_type ieee1394_bus_type;
171 extern struct class hpsb_host_class;
172 extern struct class *hpsb_protocol_class;
174 #endif /* _IEEE1394_CORE_H */