include/linux/firewire-cdev.h

   1 /*
   2  * Char device interface.
   3  *
   4  * Copyright (C) 2005-2006  Kristian Hoegsberg <krh@bitplanet.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #ifndef _LINUX_FIREWIRE_CDEV_H
  22 #define _LINUX_FIREWIRE_CDEV_H
  23
  24 #include <linux/ioctl.h>
  25 #include <linux/types.h>
  26 #include <linux/firewire-constants.h>
  27
  28 #define FW_CDEV_EVENT_BUS_RESET         0x00
  29 #define FW_CDEV_EVENT_RESPONSE          0x01
  30 #define FW_CDEV_EVENT_REQUEST           0x02
  31 #define FW_CDEV_EVENT_ISO_INTERRUPT     0x03
  32
  33 /* The 'closure' fields are for user space to use.  Data passed in the
  34  * 'closure' field for a request will be returned in the corresponding
  35  * event.  It's a 64-bit type so that it's a fixed size type big
  36  * enough to hold a pointer on all platforms. */
  37
  38 struct fw_cdev_event_common {
  39         __u64 closure;
  40         __u32 type;
  41 };
  42
  43 struct fw_cdev_event_bus_reset {
  44         __u64 closure;
  45         __u32 type;
  46         __u32 node_id;
  47         __u32 local_node_id;
  48         __u32 bm_node_id;
  49         __u32 irm_node_id;
  50         __u32 root_node_id;
  51         __u32 generation;
  52 };
  53
  54 struct fw_cdev_event_response {
  55         __u64 closure;
  56         __u32 type;
  57         __u32 rcode;
  58         __u32 length;
  59         __u32 data[0];
  60 };
  61
  62 struct fw_cdev_event_request {
  63         __u64 closure;
  64         __u32 type;
  65         __u32 tcode;
  66         __u64 offset;
  67         __u32 handle;
  68         __u32 length;
  69         __u32 data[0];
  70 };
  71
  72 struct fw_cdev_event_iso_interrupt {
  73         __u64 closure;
  74         __u32 type;
  75         __u32 cycle;
  76         __u32 header_length;    /* Length in bytes of following headers. */
  77         __u32 header[0];
  78 };
  79
  80 union fw_cdev_event {
  81         struct fw_cdev_event_common common;
  82         struct fw_cdev_event_bus_reset bus_reset;
  83         struct fw_cdev_event_response response;
  84         struct fw_cdev_event_request request;
  85         struct fw_cdev_event_iso_interrupt iso_interrupt;
  86 };
  87
  88 #define FW_CDEV_IOC_GET_INFO            _IOWR('#', 0x00, struct fw_cdev_get_info)
  89 #define FW_CDEV_IOC_SEND_REQUEST        _IOW('#', 0x01, struct fw_cdev_send_request)
  90 #define FW_CDEV_IOC_ALLOCATE            _IOWR('#', 0x02, struct fw_cdev_allocate)
  91 #define FW_CDEV_IOC_DEALLOCATE          _IOW('#', 0x03, struct fw_cdev_deallocate)
  92 #define FW_CDEV_IOC_SEND_RESPONSE       _IOW('#', 0x04, struct fw_cdev_send_response)
  93 #define FW_CDEV_IOC_INITIATE_BUS_RESET  _IOW('#', 0x05, struct fw_cdev_initiate_bus_reset)
  94 #define FW_CDEV_IOC_ADD_DESCRIPTOR      _IOWR('#', 0x06, struct fw_cdev_add_descriptor)
  95 #define FW_CDEV_IOC_REMOVE_DESCRIPTOR   _IOW('#', 0x07, struct fw_cdev_remove_descriptor)
  96
  97 #define FW_CDEV_IOC_CREATE_ISO_CONTEXT  _IOWR('#', 0x08, struct fw_cdev_create_iso_context)
  98 #define FW_CDEV_IOC_QUEUE_ISO           _IOWR('#', 0x09, struct fw_cdev_queue_iso)
  99 #define FW_CDEV_IOC_START_ISO           _IOW('#', 0x0a, struct fw_cdev_start_iso)
 100 #define FW_CDEV_IOC_STOP_ISO            _IOW('#', 0x0b, struct fw_cdev_stop_iso)
 101
 102 /* FW_CDEV_VERSION History
 103  *
 104  * 1    Feb 18, 2007:  Initial version.
 105  */
 106 #define FW_CDEV_VERSION         1
 107
 108 struct fw_cdev_get_info {
 109         /* The version field is just a running serial number.  We
 110          * never break backwards compatibility.  Userspace passes in
 111          * the version it expects and the kernel passes back the
 112          * highest version it can provide.  Even if the structs in
 113          * this interface are extended in a later version, the kernel
 114          * will not copy back more data than what was present in the
 115          * interface version userspace expects. */
 116         __u32 version;
 117
 118         /* If non-zero, at most rom_length bytes of config rom will be
 119          * copied into that user space address.  In either case,
 120          * rom_length is updated with the actual length of the config
 121          * rom. */
 122         __u32 rom_length;
 123         __u64 rom;
 124
 125         /* If non-zero, a fw_cdev_event_bus_reset struct will be
 126          * copied here with the current state of the bus.  This does
 127          * not cause a bus reset to happen.  The value of closure in
 128          * this and sub-sequent bus reset events is set to
 129          * bus_reset_closure. */
 130         __u64 bus_reset;
 131         __u64 bus_reset_closure;
 132
 133         /* The index of the card this devices belongs to. */
 134         __u32 card;
 135 };
 136
 137 struct fw_cdev_send_request {
 138         __u32 tcode;
 139         __u32 length;
 140         __u64 offset;
 141         __u64 closure;
 142         __u64 data;
 143         __u32 generation;
 144 };
 145
 146 struct fw_cdev_send_response {
 147         __u32 rcode;
 148         __u32 length;
 149         __u64 data;
 150         __u32 handle;
 151 };
 152
 153 struct fw_cdev_allocate {
 154         __u64 offset;
 155         __u64 closure;
 156         __u32 length;
 157         __u32 handle;
 158 };
 159
 160 struct fw_cdev_deallocate {
 161         __u32 handle;
 162 };
 163
 164 #define FW_CDEV_LONG_RESET      0
 165 #define FW_CDEV_SHORT_RESET     1
 166
 167 struct fw_cdev_initiate_bus_reset {
 168         __u32 type;
 169 };
 170
 171 struct fw_cdev_add_descriptor {
 172         __u32 immediate;
 173         __u32 key;
 174         __u64 data;
 175         __u32 length;
 176         __u32 handle;
 177 };
 178
 179 struct fw_cdev_remove_descriptor {
 180         __u32 handle;
 181 };
 182
 183 #define FW_CDEV_ISO_CONTEXT_TRANSMIT    0
 184 #define FW_CDEV_ISO_CONTEXT_RECEIVE     1
 185
 186 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG0           1
 187 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG1           2
 188 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG2           4
 189 #define FW_CDEV_ISO_CONTEXT_MATCH_TAG3           8
 190 #define FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS      15
 191
 192 struct fw_cdev_create_iso_context {
 193         __u32 type;
 194         __u32 header_size;
 195         __u32 channel;
 196         __u32 speed;
 197         __u64 closure;
 198         __u32 handle;
 199 };
 200
 201 struct fw_cdev_iso_packet {
 202         __u16 payload_length;   /* Length of indirect payload. */
 203         __u32 interrupt : 1;    /* Generate interrupt on this packet */
 204         __u32 skip : 1;         /* Set to not send packet at all. */
 205         __u32 tag : 2;
 206         __u32 sy : 4;
 207         __u32 header_length : 8;        /* Length of immediate header. */
 208         __u32 header[0];
 209 };
 210
 211 struct fw_cdev_queue_iso {
 212         __u64 packets;
 213         __u64 data;
 214         __u32 size;
 215         __u32 handle;
 216 };
 217
 218 struct fw_cdev_start_iso {
 219         __s32 cycle;
 220         __u32 sync;
 221         __u32 tags;
 222         __u32 handle;
 223 };
 224
 225 struct fw_cdev_stop_iso {
 226         __u32 handle;
 227 };
 228
 229 #endif /* _LINUX_FIREWIRE_CDEV_H */