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/* 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 */
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