2eae2dfd58
USB2.0 PHY hangs in Rx Compliance test when the incoming packet amplitude is varied below and above the Squelch Level of Receiver during the active packet multiple times. Version 1 of the controller allows PHY to be reset when RX fail condition is detected to work around the above issue. This feature is disabled by default and needs to be enabled using a bit from the newly added PHYRST_CFG register. This patch enables the workaround. There is no way to know controller version before device controller is started and the workaround needs to be applied for both host and device modes, so we rely on a DT property do decide when to apply the workaround. Signed-off-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
114 lines
3.4 KiB
C
114 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Cadence USBSS 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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#include <linux/usb/otg.h>
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#include <linux/usb/role.h>
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#ifndef __LINUX_CDNS3_CORE_H
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#define __LINUX_CDNS3_CORE_H
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struct cdns3;
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/**
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* struct cdns3_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 cdns3_role_driver {
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int (*start)(struct cdns3 *cdns);
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void (*stop)(struct cdns3 *cdns);
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int (*suspend)(struct cdns3 *cdns, bool do_wakeup);
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int (*resume)(struct cdns3 *cdns, bool hibernated);
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const char *name;
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#define CDNS3_ROLE_STATE_INACTIVE 0
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#define CDNS3_ROLE_STATE_ACTIVE 1
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int state;
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};
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#define CDNS3_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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};
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/**
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* struct cdns3 - 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_regs: pointer to base of otg 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 cdns3 core
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* @gadget_dev: the child gadget device pointer for cdns3 core
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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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*/
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struct cdns3 {
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struct device *dev;
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void __iomem *xhci_regs;
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struct resource xhci_res[CDNS3_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 *otg_v0_regs;
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struct cdns3_otg_regs *otg_v1_regs;
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struct cdns3_otg_common_regs *otg_regs;
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#define CDNS3_CONTROLLER_V0 0
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#define CDNS3_CONTROLLER_V1 1
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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 cdns3_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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struct cdns3_device *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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};
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int cdns3_hw_role_switch(struct cdns3 *cdns);
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#endif /* __LINUX_CDNS3_CORE_H */
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