include/linux/greybus/greybus_manifest.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Greybus manifest definition
   4  *
   5  * See "Greybus Application Protocol" document (version 0.1) for
   6  * details on these values and structures.
   7  *
   8  * Copyright 2014-2015 Google Inc.
   9  * Copyright 2014-2015 Linaro Ltd.
  10  *
  11  * Released under the GPLv2 and BSD licenses.
  12  */
  13
  14 #ifndef __GREYBUS_MANIFEST_H
  15 #define __GREYBUS_MANIFEST_H
  16
  17 #include <linux/bits.h>
  18 #include <linux/types.h>
  19
  20 enum greybus_descriptor_type {
  21         GREYBUS_TYPE_INVALID            = 0x00,
  22         GREYBUS_TYPE_INTERFACE          = 0x01,
  23         GREYBUS_TYPE_STRING             = 0x02,
  24         GREYBUS_TYPE_BUNDLE             = 0x03,
  25         GREYBUS_TYPE_CPORT              = 0x04,
  26 };
  27
  28 enum greybus_protocol {
  29         GREYBUS_PROTOCOL_CONTROL        = 0x00,
  30         /* 0x01 is unused */
  31         GREYBUS_PROTOCOL_GPIO           = 0x02,
  32         GREYBUS_PROTOCOL_I2C            = 0x03,
  33         GREYBUS_PROTOCOL_UART           = 0x04,
  34         GREYBUS_PROTOCOL_HID            = 0x05,
  35         GREYBUS_PROTOCOL_USB            = 0x06,
  36         GREYBUS_PROTOCOL_SDIO           = 0x07,
  37         GREYBUS_PROTOCOL_POWER_SUPPLY   = 0x08,
  38         GREYBUS_PROTOCOL_PWM            = 0x09,
  39         /* 0x0a is unused */
  40         GREYBUS_PROTOCOL_SPI            = 0x0b,
  41         GREYBUS_PROTOCOL_DISPLAY        = 0x0c,
  42         GREYBUS_PROTOCOL_CAMERA_MGMT    = 0x0d,
  43         GREYBUS_PROTOCOL_SENSOR         = 0x0e,
  44         GREYBUS_PROTOCOL_LIGHTS         = 0x0f,
  45         GREYBUS_PROTOCOL_VIBRATOR       = 0x10,
  46         GREYBUS_PROTOCOL_LOOPBACK       = 0x11,
  47         GREYBUS_PROTOCOL_AUDIO_MGMT     = 0x12,
  48         GREYBUS_PROTOCOL_AUDIO_DATA     = 0x13,
  49         GREYBUS_PROTOCOL_SVC            = 0x14,
  50         GREYBUS_PROTOCOL_BOOTROM        = 0x15,
  51         GREYBUS_PROTOCOL_CAMERA_DATA    = 0x16,
  52         GREYBUS_PROTOCOL_FW_DOWNLOAD    = 0x17,
  53         GREYBUS_PROTOCOL_FW_MANAGEMENT  = 0x18,
  54         GREYBUS_PROTOCOL_AUTHENTICATION = 0x19,
  55         GREYBUS_PROTOCOL_LOG            = 0x1a,
  56                 /* ... */
  57         GREYBUS_PROTOCOL_RAW            = 0xfe,
  58         GREYBUS_PROTOCOL_VENDOR         = 0xff,
  59 };
  60
  61 enum greybus_class_type {
  62         GREYBUS_CLASS_CONTROL           = 0x00,
  63         /* 0x01 is unused */
  64         /* 0x02 is unused */
  65         /* 0x03 is unused */
  66         /* 0x04 is unused */
  67         GREYBUS_CLASS_HID               = 0x05,
  68         /* 0x06 is unused */
  69         /* 0x07 is unused */
  70         GREYBUS_CLASS_POWER_SUPPLY      = 0x08,
  71         /* 0x09 is unused */
  72         GREYBUS_CLASS_BRIDGED_PHY       = 0x0a,
  73         /* 0x0b is unused */
  74         GREYBUS_CLASS_DISPLAY           = 0x0c,
  75         GREYBUS_CLASS_CAMERA            = 0x0d,
  76         GREYBUS_CLASS_SENSOR            = 0x0e,
  77         GREYBUS_CLASS_LIGHTS            = 0x0f,
  78         GREYBUS_CLASS_VIBRATOR          = 0x10,
  79         GREYBUS_CLASS_LOOPBACK          = 0x11,
  80         GREYBUS_CLASS_AUDIO             = 0x12,
  81         /* 0x13 is unused */
  82         /* 0x14 is unused */
  83         GREYBUS_CLASS_BOOTROM           = 0x15,
  84         GREYBUS_CLASS_FW_MANAGEMENT     = 0x16,
  85         GREYBUS_CLASS_LOG               = 0x17,
  86                 /* ... */
  87         GREYBUS_CLASS_RAW               = 0xfe,
  88         GREYBUS_CLASS_VENDOR            = 0xff,
  89 };
  90
  91 enum {
  92         GREYBUS_INTERFACE_FEATURE_TIMESYNC = BIT(0),
  93 };
  94
  95 /*
  96  * The string in a string descriptor is not NUL-terminated.  The
  97  * size of the descriptor will be rounded up to a multiple of 4
  98  * bytes, by padding the string with 0x00 bytes if necessary.
  99  */
 100 struct greybus_descriptor_string {
 101         __u8    length;
 102         __u8    id;
 103         __u8    string[];
 104 } __packed;
 105
 106 /*
 107  * An interface descriptor describes information about an interface as a whole,
 108  * *not* the functions within it.
 109  */
 110 struct greybus_descriptor_interface {
 111         __u8    vendor_stringid;
 112         __u8    product_stringid;
 113         __u8    features;
 114         __u8    pad;
 115 } __packed;
 116
 117 /*
 118  * An bundle descriptor defines an identification number and a class for
 119  * each bundle.
 120  *
 121  * @id: Uniquely identifies a bundle within a interface, its sole purpose is to
 122  * allow CPort descriptors to specify which bundle they are associated with.
 123  * The first bundle will have id 0, second will have 1 and so on.
 124  *
 125  * The largest CPort id associated with an bundle (defined by a
 126  * CPort descriptor in the manifest) is used to determine how to
 127  * encode the device id and module number in UniPro packets
 128  * that use the bundle.
 129  *
 130  * @class: It is used by kernel to know the functionality provided by the
 131  * bundle and will be matched against drivers functinality while probing greybus
 132  * driver. It should contain one of the values defined in
 133  * 'enum greybus_class_type'.
 134  *
 135  */
 136 struct greybus_descriptor_bundle {
 137         __u8    id;     /* interface-relative id (0..) */
 138         __u8    class;
 139         __u8    pad[2];
 140 } __packed;
 141
 142 /*
 143  * A CPort descriptor indicates the id of the bundle within the
 144  * module it's associated with, along with the CPort id used to
 145  * address the CPort.  The protocol id defines the format of messages
 146  * exchanged using the CPort.
 147  */
 148 struct greybus_descriptor_cport {
 149         __le16  id;
 150         __u8    bundle;
 151         __u8    protocol_id;    /* enum greybus_protocol */
 152 } __packed;
 153
 154 struct greybus_descriptor_header {
 155         __le16  size;
 156         __u8    type;           /* enum greybus_descriptor_type */
 157         __u8    pad;
 158 } __packed;
 159
 160 struct greybus_descriptor {
 161         struct greybus_descriptor_header                header;
 162         union {
 163                 struct greybus_descriptor_string        string;
 164                 struct greybus_descriptor_interface     interface;
 165                 struct greybus_descriptor_bundle        bundle;
 166                 struct greybus_descriptor_cport         cport;
 167         };
 168 } __packed;
 169
 170 struct greybus_manifest_header {
 171         __le16  size;
 172         __u8    version_major;
 173         __u8    version_minor;
 174 } __packed;
 175
 176 struct greybus_manifest {
 177         struct greybus_manifest_header          header;
 178         struct greybus_descriptor               descriptors[];
 179 } __packed;
 180
 181 #endif /* __GREYBUS_MANIFEST_H */