168 lines
4.3 KiB
C
168 lines
4.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Cadence USB3 DRD header file.
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*
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* Copyright (C) 2018-2019 Cadence.
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*
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* Author: Pawel Laszczak <pawell@cadence.com>
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*/
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#ifndef __LINUX_CDNS3_DRD
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#define __LINUX_CDNS3_DRD
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#include <linux/usb/otg.h>
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#include <linux/phy/phy.h>
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#include "core.h"
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/* DRD register interface for version v1. */
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struct cdns3_otg_regs {
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__le32 did;
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__le32 rid;
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__le32 capabilities;
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__le32 reserved1;
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__le32 cmd;
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__le32 sts;
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__le32 state;
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__le32 reserved2;
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__le32 ien;
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__le32 ivect;
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__le32 refclk;
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__le32 tmr;
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__le32 reserved3[4];
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__le32 simulate;
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__le32 override;
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__le32 susp_ctrl;
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__le32 reserved4;
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__le32 anasts;
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__le32 adp_ramp_time;
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__le32 ctrl1;
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__le32 ctrl2;
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};
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/* DRD register interface for version v0. */
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struct cdns3_otg_legacy_regs {
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__le32 cmd;
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__le32 sts;
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__le32 state;
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__le32 refclk;
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__le32 ien;
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__le32 ivect;
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__le32 reserved1[3];
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__le32 tmr;
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__le32 reserved2[2];
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__le32 version;
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__le32 capabilities;
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__le32 reserved3[2];
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__le32 simulate;
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__le32 reserved4[5];
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__le32 ctrl1;
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};
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/*
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* Common registers interface for both version of DRD.
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*/
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struct cdns3_otg_common_regs {
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__le32 cmd;
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__le32 sts;
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__le32 state;
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__le32 different1;
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__le32 ien;
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__le32 ivect;
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};
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/* CDNS_RID - bitmasks */
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#define CDNS_RID(p) ((p) & GENMASK(15, 0))
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/* CDNS_VID - bitmasks */
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#define CDNS_DID(p) ((p) & GENMASK(31, 0))
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/* OTGCMD - bitmasks */
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/* "Request the bus for Device mode. */
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#define OTGCMD_DEV_BUS_REQ BIT(0)
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/* Request the bus for Host mode */
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#define OTGCMD_HOST_BUS_REQ BIT(1)
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/* Enable OTG mode. */
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#define OTGCMD_OTG_EN BIT(2)
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/* Disable OTG mode */
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#define OTGCMD_OTG_DIS BIT(3)
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/*"Configure OTG as A-Device. */
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#define OTGCMD_A_DEV_EN BIT(4)
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/*"Configure OTG as A-Device. */
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#define OTGCMD_A_DEV_DIS BIT(5)
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/* Drop the bus for Device mod e. */
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#define OTGCMD_DEV_BUS_DROP BIT(8)
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/* Drop the bus for Host mode*/
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#define OTGCMD_HOST_BUS_DROP BIT(9)
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/* Power Down USBSS-DEV. */
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#define OTGCMD_DEV_POWER_OFF BIT(11)
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/* Power Down CDNSXHCI. */
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#define OTGCMD_HOST_POWER_OFF BIT(12)
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/* OTGIEN - bitmasks */
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/* ID change interrupt enable */
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#define OTGIEN_ID_CHANGE_INT BIT(0)
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/* Vbusvalid fall detected interrupt enable.*/
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#define OTGIEN_VBUSVALID_RISE_INT BIT(4)
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/* Vbusvalid fall detected interrupt enable */
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#define OTGIEN_VBUSVALID_FALL_INT BIT(5)
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/* OTGSTS - bitmasks */
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/*
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* Current value of the ID pin. It is only valid when idpullup in
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* OTGCTRL1_TYPE register is set to '1'.
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*/
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#define OTGSTS_ID_VALUE BIT(0)
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/* Current value of the vbus_valid */
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#define OTGSTS_VBUS_VALID BIT(1)
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/* Current value of the b_sess_vld */
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#define OTGSTS_SESSION_VALID BIT(2)
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/*Device mode is active*/
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#define OTGSTS_DEV_ACTIVE BIT(3)
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/* Host mode is active. */
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#define OTGSTS_HOST_ACTIVE BIT(4)
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/* OTG Controller not ready. */
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#define OTGSTS_OTG_NRDY_MASK BIT(11)
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#define OTGSTS_OTG_NRDY(p) ((p) & OTGSTS_OTG_NRDY_MASK)
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/*
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* Value of the strap pins.
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* 000 - no default configuration
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* 010 - Controller initiall configured as Host
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* 100 - Controller initially configured as Device
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*/
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#define OTGSTS_STRAP(p) (((p) & GENMASK(14, 12)) >> 12)
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#define OTGSTS_STRAP_NO_DEFAULT_CFG 0x00
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#define OTGSTS_STRAP_HOST_OTG 0x01
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#define OTGSTS_STRAP_HOST 0x02
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#define OTGSTS_STRAP_GADGET 0x04
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/* Host mode is turned on. */
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#define OTGSTS_XHCI_READY BIT(26)
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/* "Device mode is turned on .*/
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#define OTGSTS_DEV_READY BIT(27)
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/* OTGSTATE- bitmasks */
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#define OTGSTATE_DEV_STATE_MASK GENMASK(2, 0)
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#define OTGSTATE_HOST_STATE_MASK GENMASK(5, 3)
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#define OTGSTATE_HOST_STATE_IDLE 0x0
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#define OTGSTATE_HOST_STATE_VBUS_FALL 0x7
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#define OTGSTATE_HOST_STATE(p) (((p) & OTGSTATE_HOST_STATE_MASK) >> 3)
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/* OTGREFCLK - bitmasks */
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#define OTGREFCLK_STB_CLK_SWITCH_EN BIT(31)
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/* OVERRIDE - bitmasks */
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#define OVERRIDE_IDPULLUP BIT(0)
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/* Only for CDNS3_CONTROLLER_V0 version */
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#define OVERRIDE_IDPULLUP_V0 BIT(24)
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int cdns3_is_host(struct cdns3 *cdns);
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int cdns3_is_device(struct cdns3 *cdns);
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int cdns3_get_id(struct cdns3 *cdns);
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int cdns3_get_vbus(struct cdns3 *cdns);
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int cdns3_drd_init(struct cdns3 *cdns);
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int cdns3_drd_exit(struct cdns3 *cdns);
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int cdns3_drd_update_mode(struct cdns3 *cdns);
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int cdns3_drd_switch_gadget(struct cdns3 *cdns, int on);
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int cdns3_drd_switch_host(struct cdns3 *cdns, int on);
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int cdns3_set_mode(struct cdns3 *cdns, enum usb_dr_mode mode);
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#endif /* __LINUX_CDNS3_DRD */
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