/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __USB_TYPEC_DP_H
#define __USB_TYPEC_DP_H

#include <linux/usb/typec_altmode.h>
#include <linux/bitfield.h>

#define USB_TYPEC_DP_SID        0xff01
/* USB IF has not assigned a Standard ID (SID) for VirtualLink,
 * so the manufacturers of VirtualLink adapters use their Vendor
 * IDs as the SVID.
 */
#define USB_TYPEC_NVIDIA_VLINK_SID      0x955   /* NVIDIA VirtualLink */
#define USB_TYPEC_DP_MODE       1

/*
 * Connector states matching the pin assignments in DisplayPort Alt Mode
 * Specification.
 *
 * These values are meant primarily to be used by the mux drivers, but they are
 * also used as the "value" part in the alternate mode notification chain, so
 * receivers of those notifications will always see them.
 *
 * Note. DisplayPort USB Type-C Alt Mode Specification version 1.0b deprecated
 * pin assignments A, B and F, but they are still defined here for legacy
 * purposes.
 */
enum {
        TYPEC_DP_STATE_A = TYPEC_STATE_MODAL,   /* Not supported after v1.0b */
        TYPEC_DP_STATE_B,                       /* Not supported after v1.0b */
        TYPEC_DP_STATE_C,
        TYPEC_DP_STATE_D,
        TYPEC_DP_STATE_E,
        TYPEC_DP_STATE_F,                       /* Not supported after v1.0b */
};

/*
 * struct typec_displayport_data - DisplayPort Alt Mode specific data
 * @status: Status Update command VDO content
 * @conf: Configure command VDO content
 *
 * This structure is delivered as the data part with the notifications. It
 * contains the VDOs from the two DisplayPort Type-C alternate mode specific
 * commands: Status Update and Configure.
 *
 * @status will show for example the status of the HPD signal.
 */
struct typec_displayport_data {
        u32 status;
        u32 conf;
};

enum {
        DP_PIN_ASSIGN_A, /* Not supported after v1.0b */
        DP_PIN_ASSIGN_B, /* Not supported after v1.0b */
        DP_PIN_ASSIGN_C,
        DP_PIN_ASSIGN_D,
        DP_PIN_ASSIGN_E,
        DP_PIN_ASSIGN_F, /* Not supported after v1.0b */
        DP_PIN_ASSIGN_MAX,
};

/* DisplayPort alt mode specific commands */
#define DP_CMD_STATUS_UPDATE            VDO_CMD_VENDOR(0)
#define DP_CMD_CONFIGURE                VDO_CMD_VENDOR(1)

/* DisplayPort Capabilities VDO bits (returned with Discover Modes) */
#define DP_CAP_CAPABILITY(_cap_)        ((_cap_) & 3)
#define   DP_CAP_UFP_D                  1
#define   DP_CAP_DFP_D                  2
#define   DP_CAP_DFP_D_AND_UFP_D        3
#define DP_CAP_DP_SIGNALLING(_cap_)     FIELD_GET(GENMASK(5, 2), _cap_)
#define   DP_CAP_SIGNALLING_HBR3        1
#define   DP_CAP_SIGNALLING_UHBR10      2
#define   DP_CAP_SIGNALLING_UHBR20      3
#define DP_CAP_RECEPTACLE               BIT(6)
#define DP_CAP_USB                      BIT(7)
#define DP_CAP_DFP_D_PIN_ASSIGN(_cap_)  FIELD_GET(GENMASK(15, 8), _cap_)
#define DP_CAP_UFP_D_PIN_ASSIGN(_cap_)  FIELD_GET(GENMASK(23, 16), _cap_)
/* Get pin assignment taking plug & receptacle into consideration */
#define DP_CAP_PIN_ASSIGN_UFP_D(_cap_) ((_cap_ & DP_CAP_RECEPTACLE) ? \
                        DP_CAP_UFP_D_PIN_ASSIGN(_cap_) : DP_CAP_DFP_D_PIN_ASSIGN(_cap_))
#define DP_CAP_PIN_ASSIGN_DFP_D(_cap_) ((_cap_ & DP_CAP_RECEPTACLE) ? \
                        DP_CAP_DFP_D_PIN_ASSIGN(_cap_) : DP_CAP_UFP_D_PIN_ASSIGN(_cap_))
#define DP_CAP_UHBR_13_5_SUPPORT        BIT(26)
#define DP_CAP_CABLE_TYPE(_cap_)        FIELD_GET(GENMASK(29, 28), _cap_)
#define   DP_CAP_CABLE_TYPE_PASSIVE     0
#define   DP_CAP_CABLE_TYPE_RE_TIMER    1
#define   DP_CAP_CABLE_TYPE_RE_DRIVER   2
#define   DP_CAP_CABLE_TYPE_OPTICAL     3
#define DP_CAP_DPAM_VERSION             BIT(30)

/* DisplayPort Status Update VDO bits */
#define DP_STATUS_CONNECTION(_status_)  ((_status_) & 3)
#define   DP_STATUS_CON_DISABLED        0
#define   DP_STATUS_CON_DFP_D           1
#define   DP_STATUS_CON_UFP_D           2
#define   DP_STATUS_CON_BOTH            3
#define DP_STATUS_POWER_LOW             BIT(2)
#define DP_STATUS_ENABLED               BIT(3)
#define DP_STATUS_PREFER_MULTI_FUNC     BIT(4)
#define DP_STATUS_SWITCH_TO_USB         BIT(5)
#define DP_STATUS_EXIT_DP_MODE          BIT(6)
#define DP_STATUS_HPD_STATE             BIT(7) /* 0 = HPD_Low, 1 = HPD_High */
#define DP_STATUS_IRQ_HPD               BIT(8)

/* DisplayPort Configurations VDO bits */
#define DP_CONF_CURRENTLY(_conf_)       ((_conf_) & 3)
#define DP_CONF_UFP_U_AS_DFP_D          BIT(0)
#define DP_CONF_UFP_U_AS_UFP_D          BIT(1)
#define DP_CONF_SIGNALLING_MASK         GENMASK(5, 2)
#define DP_CONF_SIGNALLING_SHIFT        2
#define   DP_CONF_SIGNALLING_HBR3       1
#define   DP_CONF_SIGNALLING_UHBR10     2
#define   DP_CONF_SIGNALLING_UHBR20     3
#define DP_CONF_PIN_ASSIGNEMENT_SHIFT   8
#define DP_CONF_PIN_ASSIGNEMENT_MASK    GENMASK(15, 8)

/* Helper for setting/getting the pin assignment value to the configuration */
#define DP_CONF_SET_PIN_ASSIGN(_a_)     ((_a_) << 8)
#define DP_CONF_GET_PIN_ASSIGN(_conf_)  FIELD_GET(GENMASK(15, 8), _conf_)
#define DP_CONF_UHBR13_5_SUPPORT        BIT(26)
#define DP_CONF_CABLE_TYPE_MASK         GENMASK(29, 28)
#define DP_CONF_CABLE_TYPE_SHIFT        28
#define   DP_CONF_CABLE_TYPE_PASSIVE    0
#define   DP_CONF_CABLE_TYPE_RE_TIMER   1
#define   DP_CONF_CABLE_TYPE_RE_DRIVER  2
#define   DP_CONF_CABLE_TYPE_OPTICAL    3
#define DP_CONF_DPAM_VERSION            BIT(30)

#endif /* __USB_TYPEC_DP_H */