forked from mirrors/linux
0aca19e403
Some platforms (e.g. ti,j721e-usb, ti,am64-usb) require this bit to be set to workaround a lockup issue with PHY short suspend intervals [1]. Add a platform quirk flag to indicate if Suspend Residency should be enabled. [1] - https://www.ti.com/lit/er/sprz457h/sprz457h.pdf i2409 - USB: USB2 PHY locks up due to short suspend Signed-off-by: Roger Quadros <rogerq@kernel.org> Signed-off-by: Ravi Gunasekaran <r-gunasekaran@ti.com> Acked-by: Peter Chen <peter.chen@kernel.org> Link: https://lore.kernel.org/r/20240516044537.16801-2-r-gunasekaran@ti.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
139 lines
4.4 KiB
C
139 lines
4.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Cadence USBSS and USBSSP DRD Header File.
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*
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* Copyright (C) 2017-2018 NXP
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* Copyright (C) 2018-2019 Cadence.
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*
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* Authors: Peter Chen <peter.chen@nxp.com>
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* Pawel Laszczak <pawell@cadence.com>
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*/
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#ifndef __LINUX_CDNS3_CORE_H
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#define __LINUX_CDNS3_CORE_H
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#include <linux/usb/otg.h>
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#include <linux/usb/role.h>
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struct cdns;
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/**
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* struct cdns_role_driver - host/gadget role driver
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* @start: start this role
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* @stop: stop this role
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* @suspend: suspend callback for this role
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* @resume: resume callback for this role
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* @irq: irq handler for this role
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* @name: role name string (host/gadget)
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* @state: current state
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*/
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struct cdns_role_driver {
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int (*start)(struct cdns *cdns);
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void (*stop)(struct cdns *cdns);
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int (*suspend)(struct cdns *cdns, bool do_wakeup);
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int (*resume)(struct cdns *cdns, bool hibernated);
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const char *name;
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#define CDNS_ROLE_STATE_INACTIVE 0
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#define CDNS_ROLE_STATE_ACTIVE 1
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int state;
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};
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#define CDNS_XHCI_RESOURCES_NUM 2
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struct cdns3_platform_data {
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int (*platform_suspend)(struct device *dev,
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bool suspend, bool wakeup);
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unsigned long quirks;
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#define CDNS3_DEFAULT_PM_RUNTIME_ALLOW BIT(0)
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#define CDNS3_DRD_SUSPEND_RESIDENCY_ENABLE BIT(1)
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};
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/**
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* struct cdns - Representation of Cadence USB3 DRD controller.
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* @dev: pointer to Cadence device struct
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* @xhci_regs: pointer to base of xhci registers
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* @xhci_res: the resource for xhci
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* @dev_regs: pointer to base of dev registers
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* @otg_res: the resource for otg
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* @otg_v0_regs: pointer to base of v0 otg registers
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* @otg_v1_regs: pointer to base of v1 otg registers
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* @otg_cdnsp_regs: pointer to base of CDNSP otg registers
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* @otg_regs: pointer to base of otg registers
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* @otg_irq_regs: pointer to interrupt registers
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* @otg_irq: irq number for otg controller
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* @dev_irq: irq number for device controller
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* @wakeup_irq: irq number for wakeup event, it is optional
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* @roles: array of supported roles for this controller
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* @role: current role
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* @host_dev: the child host device pointer for cdns core
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* @gadget_dev: the child gadget device pointer
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* @usb2_phy: pointer to USB2 PHY
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* @usb3_phy: pointer to USB3 PHY
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* @mutex: the mutex for concurrent code at driver
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* @dr_mode: supported mode of operation it can be only Host, only Device
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* or OTG mode that allow to switch between Device and Host mode.
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* This field based on firmware setting, kernel configuration
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* and hardware configuration.
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* @role_sw: pointer to role switch object.
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* @in_lpm: indicate the controller is in low power mode
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* @wakeup_pending: wakeup interrupt pending
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* @pdata: platform data from glue layer
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* @lock: spinlock structure
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* @xhci_plat_data: xhci private data structure pointer
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* @gadget_init: pointer to gadget initialization function
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*/
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struct cdns {
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struct device *dev;
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void __iomem *xhci_regs;
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struct resource xhci_res[CDNS_XHCI_RESOURCES_NUM];
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struct cdns3_usb_regs __iomem *dev_regs;
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struct resource otg_res;
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struct cdns3_otg_legacy_regs __iomem *otg_v0_regs;
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struct cdns3_otg_regs __iomem *otg_v1_regs;
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struct cdnsp_otg_regs __iomem *otg_cdnsp_regs;
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struct cdns_otg_common_regs __iomem *otg_regs;
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struct cdns_otg_irq_regs __iomem *otg_irq_regs;
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#define CDNS3_CONTROLLER_V0 0
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#define CDNS3_CONTROLLER_V1 1
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#define CDNSP_CONTROLLER_V2 2
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u32 version;
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bool phyrst_a_enable;
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int otg_irq;
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int dev_irq;
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int wakeup_irq;
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struct cdns_role_driver *roles[USB_ROLE_DEVICE + 1];
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enum usb_role role;
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struct platform_device *host_dev;
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void *gadget_dev;
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struct phy *usb2_phy;
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struct phy *usb3_phy;
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/* mutext used in workqueue*/
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struct mutex mutex;
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enum usb_dr_mode dr_mode;
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struct usb_role_switch *role_sw;
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bool in_lpm;
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bool wakeup_pending;
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struct cdns3_platform_data *pdata;
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spinlock_t lock;
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struct xhci_plat_priv *xhci_plat_data;
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int (*gadget_init)(struct cdns *cdns);
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};
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int cdns_hw_role_switch(struct cdns *cdns);
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int cdns_init(struct cdns *cdns);
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int cdns_remove(struct cdns *cdns);
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#ifdef CONFIG_PM_SLEEP
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int cdns_resume(struct cdns *cdns);
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int cdns_suspend(struct cdns *cdns);
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void cdns_set_active(struct cdns *cdns, u8 set_active);
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#else /* CONFIG_PM_SLEEP */
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static inline int cdns_resume(struct cdns *cdns)
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{ return 0; }
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static inline void cdns_set_active(struct cdns *cdns, u8 set_active) { }
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static inline int cdns_suspend(struct cdns *cdns)
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{ return 0; }
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#endif /* CONFIG_PM_SLEEP */
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#endif /* __LINUX_CDNS3_CORE_H */
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