2 #ifndef _IEEE1394_CORE_H
3 #define _IEEE1394_CORE_H
5 #include <linux/slab.h>
6 #include <asm/atomic.h>
7 #include <asm/semaphore.h>
12 /* This struct is basically read-only for hosts with the exception of
13 * the data buffer contents and xnext - see below. */
15 /* This can be used for host driver internal linking.
17 * NOTE: This must be left in init state when the driver is done
18 * with it (e.g. by using list_del_init()), since the core does
19 * some sanity checks to make sure the packet is not on a
20 * driver_list when free'ing it. */
21 struct list_head driver_list;
25 /* Async and Iso types should be clear, raw means send-as-is, do not
26 * CRC! Byte swapping shall still be done in this case. */
27 enum { hpsb_async, hpsb_iso, hpsb_raw } __attribute__((packed)) type;
29 /* Okay, this is core internal and a no care for hosts.
30 * queued = queued for sending
31 * pending = sent, waiting for response
32 * complete = processing completed, successful or not
35 hpsb_unused, hpsb_queued, hpsb_pending, hpsb_complete
36 } __attribute__((packed)) state;
38 /* These are core internal. */
43 unsigned expect_response:1;
46 /* Speed to transmit with: 0 = 100Mbps, 1 = 200Mbps, 2 = 400Mbps */
47 unsigned speed_code:2;
50 * *header and *data are guaranteed to be 32-bit DMAable and may be
51 * overwritten to allow in-place byte swapping. Neither of these is
52 * CRCed (the sizes also don't include CRC), but contain space for at
53 * least one additional quadlet to allow in-place CRCing. The memory is
54 * also guaranteed to be DMA mappable.
61 struct hpsb_host *host;
62 unsigned int generation;
66 /* Function (and possible data to pass to it) to call when this
67 * packet is completed. */
68 void (*complete_routine)(void *);
71 /* XXX This is just a hack at the moment */
74 /* Store jiffies for implementing bus timeouts. */
75 unsigned long sendtime;
77 quadlet_t embedded_header[5];
80 /* Set a task for when a packet completes */
81 void hpsb_set_packet_complete_task(struct hpsb_packet *packet,
82 void (*routine)(void *), void *data);
84 static inline struct hpsb_packet *driver_packet(struct list_head *l)
86 return list_entry(l, struct hpsb_packet, driver_list);
89 void abort_timedouts(unsigned long __opaque);
91 struct hpsb_packet *hpsb_alloc_packet(size_t data_size);
92 void hpsb_free_packet(struct hpsb_packet *packet);
95 * Generation counter for the complete 1394 subsystem. Generation gets
96 * incremented on every change in the subsystem (e.g. bus reset).
98 * Use the functions, not the variable.
100 static inline unsigned int get_hpsb_generation(struct hpsb_host *host)
102 return atomic_read(&host->generation);
106 * Send a PHY configuration packet, return 0 on success, negative
109 int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt);
112 * Queue packet for transmitting, return 0 on success, negative errno
115 int hpsb_send_packet(struct hpsb_packet *packet);
118 * Queue packet for transmitting, and block until the transaction
119 * completes. Return 0 on success, negative errno on failure.
121 int hpsb_send_packet_and_wait(struct hpsb_packet *packet);
123 /* Initiate bus reset on the given host. Returns 1 if bus reset already in
124 * progress, 0 otherwise. */
125 int hpsb_reset_bus(struct hpsb_host *host, int type);
128 * The following functions are exported for host driver module usage. All of
129 * them are safe to use in interrupt contexts, although some are quite
130 * complicated so you may want to run them in bottom halves instead of calling
134 /* Notify a bus reset to the core. Returns 1 if bus reset already in progress,
136 int hpsb_bus_reset(struct hpsb_host *host);
139 * Hand over received selfid packet to the core. Complement check (second
140 * quadlet is complement of first) is expected to be done and successful.
142 void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid);
145 * Notify completion of SelfID stage to the core and report new physical ID
146 * and whether host is root now.
148 void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot);
151 * Notify core of sending a packet. Ackcode is the ack code returned for async
152 * transmits or ACKX_SEND_ERROR if the transmission failed completely; ACKX_NONE
153 * for other cases (internal errors that don't justify a panic). Safe to call
154 * from within a transmit packet routine.
156 void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
160 * Hand over received packet to the core. The contents of data are expected to
161 * be the full packet but with the CRCs left out (data block follows header
162 * immediately), with the header (i.e. the first four quadlets) in machine byte
163 * order and the data block in big endian. *data can be safely overwritten
166 * If the packet is a write request, write_acked is to be set to true if it was
167 * ack_complete'd already, false otherwise. This arg is ignored for any other
170 void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
175 * CHARACTER DEVICE DISPATCHING
177 * All ieee1394 character device drivers share the same major number
178 * (major 171). The 256 minor numbers are allocated to the various
179 * task-specific interfaces (raw1394, video1394, dv1394, etc) in
182 * The core ieee1394.o module allocates the device number region
183 * 171:0-255, the various drivers must then cdev_add() their cdev
184 * objects to handle their respective sub-regions.
186 * Minor device number block allocations:
188 * Block 0 ( 0- 15) raw1394
189 * Block 1 ( 16- 31) video1394
190 * Block 2 ( 32- 47) dv1394
192 * Blocks 3-14 free for future allocation
194 * Block 15 (240-255) reserved for drivers under development, etc.
197 #define IEEE1394_MAJOR 171
199 #define IEEE1394_MINOR_BLOCK_RAW1394 0
200 #define IEEE1394_MINOR_BLOCK_VIDEO1394 1
201 #define IEEE1394_MINOR_BLOCK_DV1394 2
202 #define IEEE1394_MINOR_BLOCK_EXPERIMENTAL 15
204 #define IEEE1394_CORE_DEV MKDEV(IEEE1394_MAJOR, 0)
205 #define IEEE1394_RAW1394_DEV MKDEV(IEEE1394_MAJOR, \
206 IEEE1394_MINOR_BLOCK_RAW1394 * 16)
207 #define IEEE1394_VIDEO1394_DEV MKDEV(IEEE1394_MAJOR, \
208 IEEE1394_MINOR_BLOCK_VIDEO1394 * 16)
209 #define IEEE1394_DV1394_DEV MKDEV(IEEE1394_MAJOR, \
210 IEEE1394_MINOR_BLOCK_DV1394 * 16)
211 #define IEEE1394_EXPERIMENTAL_DEV MKDEV(IEEE1394_MAJOR, \
212 IEEE1394_MINOR_BLOCK_EXPERIMENTAL * 16)
214 /* return the index (within a minor number block) of a file */
215 static inline unsigned char ieee1394_file_to_instance(struct file *file)
217 return file->f_dentry->d_inode->i_cindex;
220 extern int hpsb_disable_irm;
222 /* Our sysfs bus entry */
223 extern struct bus_type ieee1394_bus_type;
224 extern struct class hpsb_host_class;
225 extern struct class *hpsb_protocol_class;
227 #endif /* _IEEE1394_CORE_H */