2 #ifndef _IEEE1394_CORE_H
3 #define _IEEE1394_CORE_H
5 #include <linux/slab.h>
6 #include <linux/devfs_fs_kernel.h>
7 #include <asm/atomic.h>
8 #include <asm/semaphore.h>
13 /* This struct is basically read-only for hosts with the exception of
14 * the data buffer contents and xnext - see below. */
16 /* This can be used for host driver internal linking.
18 * NOTE: This must be left in init state when the driver is done
19 * with it (e.g. by using list_del_init()), since the core does
20 * some sanity checks to make sure the packet is not on a
21 * driver_list when free'ing it. */
22 struct list_head driver_list;
26 /* Async and Iso types should be clear, raw means send-as-is, do not
27 * CRC! Byte swapping shall still be done in this case. */
28 enum { hpsb_async, hpsb_iso, hpsb_raw } __attribute__((packed)) type;
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
36 hpsb_unused, hpsb_queued, hpsb_pending, hpsb_complete
37 } __attribute__((packed)) state;
39 /* These are core internal. */
44 unsigned expect_response:1;
47 /* Speed to transmit with: 0 = 100Mbps, 1 = 200Mbps, 2 = 400Mbps */
48 unsigned speed_code:2;
51 * *header and *data are guaranteed to be 32-bit DMAable and may be
52 * overwritten to allow in-place byte swapping. Neither of these is
53 * CRCed (the sizes also don't include CRC), but contain space for at
54 * least one additional quadlet to allow in-place CRCing. The memory is
55 * also guaranteed to be DMA mappable.
63 struct hpsb_host *host;
64 unsigned int generation;
68 /* Function (and possible data to pass to it) to call when this
69 * packet is completed. */
70 void (*complete_routine)(void *);
73 /* XXX This is just a hack at the moment */
76 /* Store jiffies for implementing bus timeouts. */
77 unsigned long sendtime;
79 quadlet_t embedded_header[5];
82 /* Set a task for when a packet completes */
83 void hpsb_set_packet_complete_task(struct hpsb_packet *packet,
84 void (*routine)(void *), void *data);
86 static inline struct hpsb_packet *driver_packet(struct list_head *l)
88 return list_entry(l, struct hpsb_packet, driver_list);
91 void abort_timedouts(unsigned long __opaque);
93 struct hpsb_packet *hpsb_alloc_packet(size_t data_size);
94 void hpsb_free_packet(struct hpsb_packet *packet);
98 * Generation counter for the complete 1394 subsystem. Generation gets
99 * incremented on every change in the subsystem (e.g. bus reset).
101 * Use the functions, not the variable.
103 static inline unsigned int get_hpsb_generation(struct hpsb_host *host)
105 return atomic_read(&host->generation);
109 * Send a PHY configuration packet, return 0 on success, negative
112 int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt);
115 * Queue packet for transmitting, return 0 on success, negative errno
118 int hpsb_send_packet(struct hpsb_packet *packet);
121 * Queue packet for transmitting, and block until the transaction
122 * completes. Return 0 on success, negative errno on failure.
124 int hpsb_send_packet_and_wait(struct hpsb_packet *packet);
126 /* Initiate bus reset on the given host. Returns 1 if bus reset already in
127 * progress, 0 otherwise. */
128 int hpsb_reset_bus(struct hpsb_host *host, int type);
131 * The following functions are exported for host driver module usage. All of
132 * them are safe to use in interrupt contexts, although some are quite
133 * complicated so you may want to run them in bottom halves instead of calling
137 /* Notify a bus reset to the core. Returns 1 if bus reset already in progress,
139 int hpsb_bus_reset(struct hpsb_host *host);
142 * Hand over received selfid packet to the core. Complement check (second
143 * quadlet is complement of first) is expected to be done and succesful.
145 void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid);
148 * Notify completion of SelfID stage to the core and report new physical ID
149 * and whether host is root now.
151 void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot);
154 * Notify core of sending a packet. Ackcode is the ack code returned for async
155 * transmits or ACKX_SEND_ERROR if the transmission failed completely; ACKX_NONE
156 * for other cases (internal errors that don't justify a panic). Safe to call
157 * from within a transmit packet routine.
159 void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
163 * Hand over received packet to the core. The contents of data are expected to
164 * be the full packet but with the CRCs left out (data block follows header
165 * immediately), with the header (i.e. the first four quadlets) in machine byte
166 * order and the data block in big endian. *data can be safely overwritten
169 * If the packet is a write request, write_acked is to be set to true if it was
170 * ack_complete'd already, false otherwise. This arg is ignored for any other
173 void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
178 * CHARACTER DEVICE DISPATCHING
180 * All ieee1394 character device drivers share the same major number
181 * (major 171). The 256 minor numbers are allocated to the various
182 * task-specific interfaces (raw1394, video1394, dv1394, etc) in
185 * The core ieee1394.o module allocates the device number region
186 * 171:0-255, the various drivers must then cdev_add() their cdev
187 * objects to handle their respective sub-regions.
189 * Minor device number block allocations:
191 * Block 0 ( 0- 15) raw1394
192 * Block 1 ( 16- 31) video1394
193 * Block 2 ( 32- 47) dv1394
195 * Blocks 3-14 free for future allocation
197 * Block 15 (240-255) reserved for drivers under development, etc.
200 #define IEEE1394_MAJOR 171
202 #define IEEE1394_MINOR_BLOCK_RAW1394 0
203 #define IEEE1394_MINOR_BLOCK_VIDEO1394 1
204 #define IEEE1394_MINOR_BLOCK_DV1394 2
205 #define IEEE1394_MINOR_BLOCK_AMDTP 3
206 #define IEEE1394_MINOR_BLOCK_EXPERIMENTAL 15
208 #define IEEE1394_CORE_DEV MKDEV(IEEE1394_MAJOR, 0)
209 #define IEEE1394_RAW1394_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_RAW1394 * 16)
210 #define IEEE1394_VIDEO1394_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_VIDEO1394 * 16)
211 #define IEEE1394_DV1394_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_DV1394 * 16)
212 #define IEEE1394_AMDTP_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_AMDTP * 16)
213 #define IEEE1394_EXPERIMENTAL_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_EXPERIMENTAL * 16)
215 /* return the index (within a minor number block) of a file */
216 static inline unsigned char ieee1394_file_to_instance(struct file *file)
218 return file->f_dentry->d_inode->i_cindex;
221 extern int hpsb_disable_irm;
223 /* Our sysfs bus entry */
224 extern struct bus_type ieee1394_bus_type;
225 extern struct class hpsb_host_class;
226 extern struct class *hpsb_protocol_class;
228 #endif /* _IEEE1394_CORE_H */