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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Cadence USB3 DRD header file.
*
* Copyright (C) 2018-2019 Cadence.
*
* Author: Pawel Laszczak <pawell@cadence.com>
*/
#ifndef __LINUX_CDNS3_DRD
#define __LINUX_CDNS3_DRD
#include <linux/bitops.h>
#include <linux/types.h>
#include <linux/usb/otg.h>
#include "core.h"
/* DRD register interface for version v1. */
struct cdns3_otg_regs {
__le32 did;
__le32 rid;
__le32 capabilities;
__le32 reserved1;
__le32 cmd;
__le32 sts;
__le32 state;
__le32 reserved2;
__le32 ien;
__le32 ivect;
__le32 refclk;
__le32 tmr;
__le32 reserved3[4];
__le32 simulate;
__le32 override;
__le32 susp_ctrl;
__le32 reserved4;
__le32 anasts;
__le32 adp_ramp_time;
__le32 ctrl1;
__le32 ctrl2;
};
/* DRD register interface for version v0. */
struct cdns3_otg_legacy_regs {
__le32 cmd;
__le32 sts;
__le32 state;
__le32 refclk;
__le32 ien;
__le32 ivect;
__le32 reserved1[3];
__le32 tmr;
__le32 reserved2[2];
__le32 version;
__le32 capabilities;
__le32 reserved3[2];
__le32 simulate;
__le32 reserved4[5];
__le32 ctrl1;
};
/*
* Common registers interface for both version of DRD.
*/
struct cdns3_otg_common_regs {
__le32 cmd;
__le32 sts;
__le32 state;
__le32 different1;
__le32 ien;
__le32 ivect;
};
/* CDNS_RID - bitmasks */
#define CDNS_RID(p) ((p) & GENMASK(15, 0))
/* CDNS_VID - bitmasks */
#define CDNS_DID(p) ((p) & GENMASK(31, 0))
/* OTGCMD - bitmasks */
/* "Request the bus for Device mode. */
#define OTGCMD_DEV_BUS_REQ BIT(0)
/* Request the bus for Host mode */
#define OTGCMD_HOST_BUS_REQ BIT(1)
/* Enable OTG mode. */
#define OTGCMD_OTG_EN BIT(2)
/* Disable OTG mode */
#define OTGCMD_OTG_DIS BIT(3)
/*"Configure OTG as A-Device. */
#define OTGCMD_A_DEV_EN BIT(4)
/*"Configure OTG as A-Device. */
#define OTGCMD_A_DEV_DIS BIT(5)
/* Drop the bus for Device mod e. */
#define OTGCMD_DEV_BUS_DROP BIT(8)
/* Drop the bus for Host mode*/
#define OTGCMD_HOST_BUS_DROP BIT(9)
/* Power Down USBSS-DEV. */
#define OTGCMD_DEV_POWER_OFF BIT(11)
/* Power Down CDNSXHCI. */
#define OTGCMD_HOST_POWER_OFF BIT(12)
/* OTGIEN - bitmasks */
/* ID change interrupt enable */
#define OTGIEN_ID_CHANGE_INT BIT(0)
/* Vbusvalid fall detected interrupt enable.*/
#define OTGIEN_VBUSVALID_RISE_INT BIT(4)
/* Vbusvalid fall detected interrupt enable */
#define OTGIEN_VBUSVALID_FALL_INT BIT(5)
/* OTGSTS - bitmasks */
/*
* Current value of the ID pin. It is only valid when idpullup in
* OTGCTRL1_TYPE register is set to '1'.
*/
#define OTGSTS_ID_VALUE BIT(0)
/* Current value of the vbus_valid */
#define OTGSTS_VBUS_VALID BIT(1)
/* Current value of the b_sess_vld */
#define OTGSTS_SESSION_VALID BIT(2)
/*Device mode is active*/
#define OTGSTS_DEV_ACTIVE BIT(3)
/* Host mode is active. */
#define OTGSTS_HOST_ACTIVE BIT(4)
/* OTG Controller not ready. */
#define OTGSTS_OTG_NRDY_MASK BIT(11)
#define OTGSTS_OTG_NRDY(p) ((p) & OTGSTS_OTG_NRDY_MASK)
/*
* Value of the strap pins.
* 000 - no default configuration
* 010 - Controller initiall configured as Host
* 100 - Controller initially configured as Device
*/
#define OTGSTS_STRAP(p) (((p) & GENMASK(14, 12)) >> 12)
#define OTGSTS_STRAP_NO_DEFAULT_CFG 0x00
#define OTGSTS_STRAP_HOST_OTG 0x01
#define OTGSTS_STRAP_HOST 0x02
#define OTGSTS_STRAP_GADGET 0x04
/* Host mode is turned on. */
#define OTGSTS_XHCI_READY BIT(26)
/* "Device mode is turned on .*/
#define OTGSTS_DEV_READY BIT(27)
/* OTGSTATE- bitmasks */
#define OTGSTATE_DEV_STATE_MASK GENMASK(2, 0)
#define OTGSTATE_HOST_STATE_MASK GENMASK(5, 3)
#define OTGSTATE_HOST_STATE_IDLE 0x0
#define OTGSTATE_HOST_STATE_VBUS_FALL 0x7
#define OTGSTATE_HOST_STATE(p) (((p) & OTGSTATE_HOST_STATE_MASK) >> 3)
/* OTGREFCLK - bitmasks */
#define OTGREFCLK_STB_CLK_SWITCH_EN BIT(31)
/* OVERRIDE - bitmasks */
#define OVERRIDE_IDPULLUP BIT(0)
/* Only for CDNS3_CONTROLLER_V0 version */
#define OVERRIDE_IDPULLUP_V0 BIT(24)
int cdns3_is_host(struct cdns3 *cdns);
int cdns3_is_device(struct cdns3 *cdns);
int cdns3_get_id(struct cdns3 *cdns);
int cdns3_get_vbus(struct cdns3 *cdns);
int cdns3_drd_init(struct cdns3 *cdns);
int cdns3_drd_exit(struct cdns3 *cdns);
int cdns3_drd_update_mode(struct cdns3 *cdns);
int cdns3_drd_switch_gadget(struct cdns3 *cdns, int on);
int cdns3_drd_switch_host(struct cdns3 *cdns, int on);
#endif /* __LINUX_CDNS3_DRD */
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