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usb: Add Cadence USB3 host and gadget driver

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Add support for USB3 host and gadget driver. This is a direct sync of
Linux kernel Cadence USB stack that from v5.4-rc1 release.
Driver has been modified so that it compiles without errors against
U-Boot code base.
Features not required for U-Boot such as scatter-gather DMA and OTG
interrupt handling has been dropped.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
[jjhiblot@ti.com: Add PHY support]
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
This commit is contained in:
Vignesh Raghavendra 2019-10-01 17:26:33 +05:30 • committed by Marek Vasut
parent 8d94e184ff
commit 7e91f6ccdc
18 changed files with 6433 additions and 0 deletions
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108
drivers/usb/cdns3/core.h Normal file
View file

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Cadence USBSS DRD Header File.
*
* Copyright (C) 2017-2018 NXP
* Copyright (C) 2018-2019 Cadence.
*
* Authors: Peter Chen <peter.chen@nxp.com>
* Pawel Laszczak <pawell@cadence.com>
*/
#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/usb/otg.h>
#include <generic-phy.h>
#ifndef __LINUX_CDNS3_CORE_H
#define __LINUX_CDNS3_CORE_H
enum usb_role {
USB_ROLE_NONE,
USB_ROLE_HOST,
USB_ROLE_DEVICE,
};
struct cdns3;
/**
* struct cdns3_role_driver - host/gadget role driver
* @start: start this role
* @stop: stop this role
* @suspend: suspend callback for this role
* @resume: resume callback for this role
* @irq: irq handler for this role
* @name: role name string (host/gadget)
* @state: current state
*/
struct cdns3_role_driver {
int (*start)(struct cdns3 *cdns);
void (*stop)(struct cdns3 *cdns);
int (*suspend)(struct cdns3 *cdns, bool do_wakeup);
int (*resume)(struct cdns3 *cdns, bool hibernated);
const char *name;
#define CDNS3_ROLE_STATE_INACTIVE 0
#define CDNS3_ROLE_STATE_ACTIVE 1
int state;
};
#define CDNS3_XHCI_RESOURCES_NUM 2
/**
* struct cdns3 - Representation of Cadence USB3 DRD controller.
* @dev: pointer to Cadence device struct
* @xhci_regs: pointer to base of xhci registers
* @dev_regs: pointer to base of dev registers
* @otg_v0_regs: pointer to base of v0 otg registers
* @otg_v1_regs: pointer to base of v1 otg registers
* @otg_regs: pointer to base of otg registers
* @otg_irq: irq number for otg controller
* @dev_irq: irq number for device controller
* @roles: array of supported roles for this controller
* @role: current role
* @host_dev: the child host device pointer for cdns3 core
* @gadget_dev: the child gadget device pointer for cdns3 core
* @usb2_phy: pointer to USB2 PHY
* @usb3_phy: pointer to USB3 PHY
* @mutex: the mutex for concurrent code at driver
* @dr_mode: supported mode of operation it can be only Host, only Device
* or OTG mode that allow to switch between Device and Host mode.
* This field based on firmware setting, kernel configuration
* and hardware configuration.
* @role_sw: pointer to role switch object.
* @role_override: set 1 if role rely on SW.
*/
struct cdns3 {
struct udevice *dev;
void __iomem *xhci_regs;
struct cdns3_usb_regs __iomem *dev_regs;
struct cdns3_otg_legacy_regs *otg_v0_regs;
struct cdns3_otg_regs *otg_v1_regs;
struct cdns3_otg_common_regs *otg_regs;
#define CDNS3_CONTROLLER_V0 0
#define CDNS3_CONTROLLER_V1 1
u32 version;
int otg_irq;
int dev_irq;
struct cdns3_role_driver *roles[USB_ROLE_DEVICE + 1];
enum usb_role role;
struct cdns3_device *gadget_dev;
struct phy usb2_phy;
struct phy usb3_phy;
/* mutext used in workqueue*/
struct mutex mutex;
enum usb_dr_mode dr_mode;
int role_override;
};
int cdns3_hw_role_switch(struct cdns3 *cdns);
/**
* cdns3_bind - generic bind function
* @parent - pointer to parent udevice of which cdns3 USB controller
* node is child of
*
* return 0 on success, negative errno otherwise
*/
int cdns3_bind(struct udevice *dev);
#endif /* __LINUX_CDNS3_CORE_H */