| /* 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 */ |