/* SPDX-License-Identifier: GPL-2.0 */ /* * Standalone EHCI usb debug driver * * Originally written by: * Eric W. Biederman" <ebiederm@xmission.com> and * Yinghai Lu <yhlu.kernel@gmail.com> * * Changes for early/late printk and HW errata: * Jason Wessel <jason.wessel@windriver.com> * Copyright (C) 2009 Wind River Systems, Inc. * */ #ifndef __LINUX_USB_EHCI_DBGP_H #define __LINUX_USB_EHCI_DBGP_H #include <linux/console.h> #include <linux/types.h> /* Appendix C, Debug port ... intended for use with special "debug devices" * that can help if there's no serial console. (nonstandard enumeration.) */ struct ehci_dbg_port { u32 control; #define DBGP_OWNER (1<<30) #define DBGP_ENABLED (1<<28) #define DBGP_DONE (1<<16) #define DBGP_INUSE (1<<10) #define DBGP_ERRCODE(x) (((x)>>7)&0x07) # define DBGP_ERR_BAD 1 # define DBGP_ERR_SIGNAL 2 #define DBGP_ERROR (1<<6) #define DBGP_GO (1<<5) #define DBGP_OUT (1<<4) #define DBGP_LEN(x) (((x)>>0)&0x0f) u32 pids; #define DBGP_PID_GET(x) (((x)>>16)&0xff) #define DBGP_PID_SET(data, tok) (((data)<<8)|(tok)) u32 data03; u32 data47; u32 address; #define DBGP_EPADDR(dev, ep) (((dev)<<8)|(ep)) }; #ifdef CONFIG_EARLY_PRINTK_DBGP extern int early_dbgp_init(char *s); extern struct console early_dbgp_console; #endif /* CONFIG_EARLY_PRINTK_DBGP */ struct usb_hcd; #ifdef CONFIG_XEN_DOM0 extern int xen_dbgp_reset_prep(struct usb_hcd *); extern int xen_dbgp_external_startup(struct usb_hcd *); #else static inline int xen_dbgp_reset_prep(struct usb_hcd *hcd) { return 1; /* Shouldn't this be 0? */ } static inline int xen_dbgp_external_startup(struct usb_hcd *hcd) { return -1; } #endif #ifdef CONFIG_EARLY_PRINTK_DBGP /* Call backs from ehci host driver to ehci debug driver */ extern int dbgp_external_startup(struct usb_hcd *); extern int dbgp_reset_prep(struct usb_hcd *); #else static inline int dbgp_reset_prep(struct usb_hcd *hcd) { return xen_dbgp_reset_prep(hcd); } static inline int dbgp_external_startup(struct usb_hcd *hcd) { return xen_dbgp_external_startup(hcd); } #endif #endif /* __LINUX_USB_EHCI_DBGP_H */