224 lines
5.8 KiB
C
224 lines
5.8 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Cadence USB3 and USBSSP DRD header file.
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*
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* Copyright (C) 2018-2020 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 "core.h"
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/* DRD register interface for version v1 of cdns3 driver. */
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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 phyrst_cfg;
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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 of cdns3 driver. */
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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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/* DRD register interface for cdnsp driver */
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struct cdnsp_otg_regs {
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__le32 did;
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__le32 rid;
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__le32 cfgs1;
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__le32 cfgs2;
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__le32 cmd;
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__le32 sts;
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__le32 state;
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__le32 ien;
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__le32 ivect;
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__le32 tmr;
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__le32 simulate;
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__le32 adpbc_sts;
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__le32 adp_ramp_time;
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__le32 adpbc_ctrl1;
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__le32 adpbc_ctrl2;
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__le32 override;
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__le32 vbusvalid_dbnc_cfg;
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__le32 sessvalid_dbnc_cfg;
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__le32 susp_timing_ctrl;
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};
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/* CDNSP driver supports 0x000403xx Cadence USB controller family. */
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#define OTG_CDNSP_CHECK_DID(did) (((did) & GENMASK(31, 8)) == 0x00040300)
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/* CDNS3 driver supports 0x000402xx Cadence USB controller family. */
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#define OTG_CDNS3_CHECK_DID(did) (((did) & GENMASK(31, 8)) == 0x00040200)
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/*
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* Common registers interface for both CDNS3 and CDNSP version of DRD.
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*/
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struct cdns_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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};
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/*
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* Interrupt related registers. This registers are mapped in different
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* location for CDNSP controller.
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*/
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struct cdns_otg_irq_regs {
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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 - only for CDNS3.*/
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#define OTGCMD_DEV_POWER_OFF BIT(11)
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/* Power Down CDNSXHCI - only for CDNS3. */
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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 for:
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* CDNS3:
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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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* CDNSP:
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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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#define OTGSTS_CDNSP_STRAP_HOST 0x01
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#define OTGSTS_CDNSP_STRAP_GADGET 0x02
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/* Host mode is turned on. */
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#define OTGSTS_CDNS3_XHCI_READY BIT(26)
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#define OTGSTS_CDNSP_XHCI_READY BIT(27)
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/* "Device mode is turned on .*/
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#define OTGSTS_CDNS3_DEV_READY BIT(27)
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#define OTGSTS_CDNSP_DEV_READY BIT(26)
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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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/* Vbusvalid/Sesvalid override select. */
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#define OVERRIDE_SESS_VLD_SEL BIT(10)
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/* PHYRST_CFG - bitmasks */
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#define PHYRST_CFG_PHYRST_A_ENABLE BIT(0)
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#define CDNS3_ID_PERIPHERAL 1
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#define CDNS3_ID_HOST 0
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bool cdns_is_host(struct cdns *cdns);
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bool cdns_is_device(struct cdns *cdns);
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int cdns_get_id(struct cdns *cdns);
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int cdns_get_vbus(struct cdns *cdns);
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void cdns_clear_vbus(struct cdns *cdns);
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void cdns_set_vbus(struct cdns *cdns);
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int cdns_drd_init(struct cdns *cdns);
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int cdns_drd_exit(struct cdns *cdns);
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int cdns_drd_update_mode(struct cdns *cdns);
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int cdns_drd_gadget_on(struct cdns *cdns);
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void cdns_drd_gadget_off(struct cdns *cdns);
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int cdns_drd_host_on(struct cdns *cdns);
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void cdns_drd_host_off(struct cdns *cdns);
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bool cdns_power_is_lost(struct cdns *cdns);
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#endif /* __LINUX_CDNS3_DRD */
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