/* 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 )&0 x07)
# 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 )&0 x0f)
u32 pids;
#define DBGP_PID_GET(x) (((x)>>16 )&0 xff)
#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 */
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