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