include/linux/usb/typec.h

   1
   2 #ifndef __LINUX_USB_TYPEC_H
   3 #define __LINUX_USB_TYPEC_H
   4
   5 #include <linux/types.h>
   6
   7 /* XXX: Once we have a header for USB Power Delivery, this belongs there */
   8 #define ALTMODE_MAX_MODES       6
   9
  10 /* USB Type-C Specification releases */
  11 #define USB_TYPEC_REV_1_0       0x100 /* 1.0 */
  12 #define USB_TYPEC_REV_1_1       0x110 /* 1.1 */
  13 #define USB_TYPEC_REV_1_2       0x120 /* 1.2 */
  14
  15 struct typec_altmode;
  16 struct typec_partner;
  17 struct typec_cable;
  18 struct typec_plug;
  19 struct typec_port;
  20
  21 struct fwnode_handle;
  22
  23 enum typec_port_type {
  24         TYPEC_PORT_DFP,
  25         TYPEC_PORT_UFP,
  26         TYPEC_PORT_DRP,
  27 };
  28
  29 enum typec_plug_type {
  30         USB_PLUG_NONE,
  31         USB_PLUG_TYPE_A,
  32         USB_PLUG_TYPE_B,
  33         USB_PLUG_TYPE_C,
  34         USB_PLUG_CAPTIVE,
  35 };
  36
  37 enum typec_data_role {
  38         TYPEC_DEVICE,
  39         TYPEC_HOST,
  40 };
  41
  42 enum typec_role {
  43         TYPEC_SINK,
  44         TYPEC_SOURCE,
  45 };
  46
  47 enum typec_pwr_opmode {
  48         TYPEC_PWR_MODE_USB,
  49         TYPEC_PWR_MODE_1_5A,
  50         TYPEC_PWR_MODE_3_0A,
  51         TYPEC_PWR_MODE_PD,
  52 };
  53
  54 enum typec_accessory {
  55         TYPEC_ACCESSORY_NONE,
  56         TYPEC_ACCESSORY_AUDIO,
  57         TYPEC_ACCESSORY_DEBUG,
  58 };
  59
  60 #define TYPEC_MAX_ACCESSORY     3
  61
  62 /*
  63  * struct usb_pd_identity - USB Power Delivery identity data
  64  * @id_header: ID Header VDO
  65  * @cert_stat: Cert Stat VDO
  66  * @product: Product VDO
  67  *
  68  * USB power delivery Discover Identity command response data.
  69  *
  70  * REVISIT: This is USB Power Delivery specific information, so this structure
  71  * probable belongs to USB Power Delivery header file once we have them.
  72  */
  73 struct usb_pd_identity {
  74         u32                     id_header;
  75         u32                     cert_stat;
  76         u32                     product;
  77 };
  78
  79 int typec_partner_set_identity(struct typec_partner *partner);
  80 int typec_cable_set_identity(struct typec_cable *cable);
  81
  82 /*
  83  * struct typec_mode_desc - Individual Mode of an Alternate Mode
  84  * @index: Index of the Mode within the SVID
  85  * @vdo: VDO returned by Discover Modes USB PD command
  86  * @desc: Optional human readable description of the mode
  87  * @roles: Only for ports. DRP if the mode is available in both roles
  88  *
  89  * Description of a mode of an Alternate Mode which a connector, cable plug or
  90  * partner supports. Every mode will have it's own sysfs group. The details are
  91  * the VDO returned by discover modes command, description for the mode and
  92  * active flag telling has the mode being entered or not.
  93  */
  94 struct typec_mode_desc {
  95         int                     index;
  96         u32                     vdo;
  97         char                    *desc;
  98         /* Only used with ports */
  99         enum typec_port_type    roles;
 100 };
 101
 102 /*
 103  * struct typec_altmode_desc - USB Type-C Alternate Mode Descriptor
 104  * @svid: Standard or Vendor ID
 105  * @n_modes: Number of modes
 106  * @modes: Array of modes supported by the Alternate Mode
 107  *
 108  * Representation of an Alternate Mode that has SVID assigned by USB-IF. The
 109  * array of modes will list the modes of a particular SVID that are supported by
 110  * a connector, partner of a cable plug.
 111  */
 112 struct typec_altmode_desc {
 113         u16                     svid;
 114         int                     n_modes;
 115         struct typec_mode_desc  modes[ALTMODE_MAX_MODES];
 116 };
 117
 118 struct typec_altmode
 119 *typec_partner_register_altmode(struct typec_partner *partner,
 120                                 const struct typec_altmode_desc *desc);
 121 struct typec_altmode
 122 *typec_plug_register_altmode(struct typec_plug *plug,
 123                              const struct typec_altmode_desc *desc);
 124 struct typec_altmode
 125 *typec_port_register_altmode(struct typec_port *port,
 126                              const struct typec_altmode_desc *desc);
 127 void typec_unregister_altmode(struct typec_altmode *altmode);
 128
 129 struct typec_port *typec_altmode2port(struct typec_altmode *alt);
 130
 131 void typec_altmode_update_active(struct typec_altmode *alt, int mode,
 132                                  bool active);
 133
 134 enum typec_plug_index {
 135         TYPEC_PLUG_SOP_P,
 136         TYPEC_PLUG_SOP_PP,
 137 };
 138
 139 /*
 140  * struct typec_plug_desc - USB Type-C Cable Plug Descriptor
 141  * @index: SOP Prime for the plug connected to DFP and SOP Double Prime for the
 142  *         plug connected to UFP
 143  *
 144  * Represents USB Type-C Cable Plug.
 145  */
 146 struct typec_plug_desc {
 147         enum typec_plug_index   index;
 148 };
 149
 150 /*
 151  * struct typec_cable_desc - USB Type-C Cable Descriptor
 152  * @type: The plug type from USB PD Cable VDO
 153  * @active: Is the cable active or passive
 154  * @identity: Result of Discover Identity command
 155  *
 156  * Represents USB Type-C Cable attached to USB Type-C port.
 157  */
 158 struct typec_cable_desc {
 159         enum typec_plug_type    type;
 160         unsigned int            active:1;
 161         struct usb_pd_identity  *identity;
 162 };
 163
 164 /*
 165  * struct typec_partner_desc - USB Type-C Partner Descriptor
 166  * @usb_pd: USB Power Delivery support
 167  * @accessory: Audio, Debug or none.
 168  * @identity: Discover Identity command data
 169  *
 170  * Details about a partner that is attached to USB Type-C port. If @identity
 171  * member exists when partner is registered, a directory named "identity" is
 172  * created to sysfs for the partner device.
 173  */
 174 struct typec_partner_desc {
 175         unsigned int            usb_pd:1;
 176         enum typec_accessory    accessory;
 177         struct usb_pd_identity  *identity;
 178 };
 179
 180 /*
 181  * struct typec_capability - USB Type-C Port Capabilities
 182  * @role: DFP (Host-only), UFP (Device-only) or DRP (Dual Role)
 183  * @revision: USB Type-C Specification release. Binary coded decimal
 184  * @pd_revision: USB Power Delivery Specification revision if supported
 185  * @prefer_role: Initial role preference
 186  * @accessory: Supported Accessory Modes
 187  * @fwnode: Optional fwnode of the port
 188  * @try_role: Set data role preference for DRP port
 189  * @dr_set: Set Data Role
 190  * @pr_set: Set Power Role
 191  * @vconn_set: Set VCONN Role
 192  * @activate_mode: Enter/exit given Alternate Mode
 193  * @port_type_set: Set port type
 194  *
 195  * Static capabilities of a single USB Type-C port.
 196  */
 197 struct typec_capability {
 198         enum typec_port_type    type;
 199         u16                     revision; /* 0120H = "1.2" */
 200         u16                     pd_revision; /* 0300H = "3.0" */
 201         int                     prefer_role;
 202         enum typec_accessory    accessory[TYPEC_MAX_ACCESSORY];
 203
 204         struct fwnode_handle    *fwnode;
 205
 206         int             (*try_role)(const struct typec_capability *,
 207                                     int role);
 208
 209         int             (*dr_set)(const struct typec_capability *,
 210                                   enum typec_data_role);
 211         int             (*pr_set)(const struct typec_capability *,
 212                                   enum typec_role);
 213         int             (*vconn_set)(const struct typec_capability *,
 214                                      enum typec_role);
 215
 216         int             (*activate_mode)(const struct typec_capability *,
 217                                          int mode, int activate);
 218         int             (*port_type_set)(const struct typec_capability *,
 219                                         enum typec_port_type);
 220
 221 };
 222
 223 /* Specific to try_role(). Indicates the user want's to clear the preference. */
 224 #define TYPEC_NO_PREFERRED_ROLE (-1)
 225
 226 struct typec_port *typec_register_port(struct device *parent,
 227                                        const struct typec_capability *cap);
 228 void typec_unregister_port(struct typec_port *port);
 229
 230 struct typec_partner *typec_register_partner(struct typec_port *port,
 231                                              struct typec_partner_desc *desc);
 232 void typec_unregister_partner(struct typec_partner *partner);
 233
 234 struct typec_cable *typec_register_cable(struct typec_port *port,
 235                                          struct typec_cable_desc *desc);
 236 void typec_unregister_cable(struct typec_cable *cable);
 237
 238 struct typec_plug *typec_register_plug(struct typec_cable *cable,
 239                                        struct typec_plug_desc *desc);
 240 void typec_unregister_plug(struct typec_plug *plug);
 241
 242 void typec_set_data_role(struct typec_port *port, enum typec_data_role role);
 243 void typec_set_pwr_role(struct typec_port *port, enum typec_role role);
 244 void typec_set_vconn_role(struct typec_port *port, enum typec_role role);
 245 void typec_set_pwr_opmode(struct typec_port *port, enum typec_pwr_opmode mode);
 246
 247 #endif /* __LINUX_USB_TYPEC_H */