1 #ifndef _FIREWIRE_CORE_H
2 #define _FIREWIRE_CORE_H
5 #include <linux/list.h>
7 #include <linux/mm_types.h>
8 #include <linux/rwsem.h>
9 #include <linux/slab.h>
10 #include <linux/types.h>
12 #include <asm/atomic.h>
18 struct fw_iso_context;
26 /* bitfields within the PHY registers */
27 #define PHY_LINK_ACTIVE 0x80
28 #define PHY_CONTENDER 0x40
29 #define PHY_BUS_RESET 0x40
30 #define PHY_BUS_SHORT_RESET 0x40
32 #define BANDWIDTH_AVAILABLE_INITIAL 4915
33 #define BROADCAST_CHANNEL_INITIAL (1 << 31 | 31)
34 #define BROADCAST_CHANNEL_VALID (1 << 30)
36 struct fw_card_driver {
38 * Enable the given card with the given initial config rom.
39 * This function is expected to activate the card, and either
40 * enable the PHY or set the link_on bit and initiate a bus
43 int (*enable)(struct fw_card *card, u32 *config_rom, size_t length);
45 int (*update_phy_reg)(struct fw_card *card, int address,
46 int clear_bits, int set_bits);
49 * Update the config rom for an enabled card. This function
50 * should change the config rom that is presented on the bus
51 * an initiate a bus reset.
53 int (*set_config_rom)(struct fw_card *card,
54 u32 *config_rom, size_t length);
56 void (*send_request)(struct fw_card *card, struct fw_packet *packet);
57 void (*send_response)(struct fw_card *card, struct fw_packet *packet);
58 /* Calling cancel is valid once a packet has been submitted. */
59 int (*cancel_packet)(struct fw_card *card, struct fw_packet *packet);
62 * Allow the specified node ID to do direct DMA out and in of
63 * host memory. The card will disable this for all node when
64 * a bus reset happens, so driver need to reenable this after
65 * bus reset. Returns 0 on success, -ENODEV if the card
66 * doesn't support this, -ESTALE if the generation doesn't
69 int (*enable_phys_dma)(struct fw_card *card,
70 int node_id, int generation);
72 u64 (*get_bus_time)(struct fw_card *card);
74 struct fw_iso_context *
75 (*allocate_iso_context)(struct fw_card *card,
76 int type, int channel, size_t header_size);
77 void (*free_iso_context)(struct fw_iso_context *ctx);
79 int (*start_iso)(struct fw_iso_context *ctx,
80 s32 cycle, u32 sync, u32 tags);
82 int (*queue_iso)(struct fw_iso_context *ctx,
83 struct fw_iso_packet *packet,
84 struct fw_iso_buffer *buffer,
85 unsigned long payload);
87 int (*stop_iso)(struct fw_iso_context *ctx);
90 void fw_card_initialize(struct fw_card *card,
91 const struct fw_card_driver *driver, struct device *device);
92 int fw_card_add(struct fw_card *card,
93 u32 max_receive, u32 link_speed, u64 guid);
94 void fw_core_remove_card(struct fw_card *card);
95 int fw_core_initiate_bus_reset(struct fw_card *card, int short_reset);
96 int fw_compute_block_crc(u32 *block);
97 void fw_schedule_bm_work(struct fw_card *card, unsigned long delay);
102 extern const struct file_operations fw_device_ops;
104 void fw_device_cdev_update(struct fw_device *device);
105 void fw_device_cdev_remove(struct fw_device *device);
110 extern struct rw_semaphore fw_device_rwsem;
111 extern struct idr fw_device_idr;
112 extern int fw_cdev_major;
114 struct fw_device *fw_device_get_by_devt(dev_t devt);
115 int fw_device_set_broadcast_channel(struct device *dev, void *gen);
116 void fw_node_event(struct fw_card *card, struct fw_node *node, int event);
121 int fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma);
122 void fw_iso_resource_manage(struct fw_card *card, int generation,
123 u64 channels_mask, int *channel, int *bandwidth,
124 bool allocate, __be32 buffer[2]);
135 FW_NODE_INITIATED_RESET,
143 u8 initiated_reset:1;
145 u8 phy_speed:2; /* As in the self ID packet. */
146 u8 max_speed:2; /* Minimum of all phy-speeds on the path from the
147 * local node to this node. */
148 u8 max_depth:4; /* Maximum depth to any leaf node */
149 u8 max_hops:4; /* Max hops in this sub tree */
152 /* For serializing node topology into a list. */
153 struct list_head link;
155 /* Upper layer specific data. */
158 struct fw_node *ports[0];
161 static inline struct fw_node *fw_node_get(struct fw_node *node)
163 atomic_inc(&node->ref_count);
168 static inline void fw_node_put(struct fw_node *node)
170 if (atomic_dec_and_test(&node->ref_count))
174 void fw_core_handle_bus_reset(struct fw_card *card, int node_id,
175 int generation, int self_id_count, u32 *self_ids);
176 void fw_destroy_nodes(struct fw_card *card);
179 * Check whether new_generation is the immediate successor of old_generation.
180 * Take counter roll-over at 255 (as per OHCI) into account.
182 static inline bool is_next_generation(int new_generation, int old_generation)
184 return (new_generation & 0xff) == ((old_generation + 1) & 0xff);
190 #define TCODE_IS_READ_REQUEST(tcode) (((tcode) & ~1) == 4)
191 #define TCODE_IS_BLOCK_PACKET(tcode) (((tcode) & 1) != 0)
192 #define TCODE_IS_REQUEST(tcode) (((tcode) & 2) == 0)
193 #define TCODE_IS_RESPONSE(tcode) (((tcode) & 2) != 0)
194 #define TCODE_HAS_REQUEST_DATA(tcode) (((tcode) & 12) != 4)
195 #define TCODE_HAS_RESPONSE_DATA(tcode) (((tcode) & 12) != 0)
197 #define LOCAL_BUS 0xffc0
199 void fw_core_handle_request(struct fw_card *card, struct fw_packet *request);
200 void fw_core_handle_response(struct fw_card *card, struct fw_packet *packet);
201 void fw_fill_response(struct fw_packet *response, u32 *request_header,
202 int rcode, void *payload, size_t length);
203 void fw_flush_transactions(struct fw_card *card);
204 void fw_send_phy_config(struct fw_card *card,
205 int node_id, int generation, int gap_count);
207 #endif /* _FIREWIRE_CORE_H */