1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Standalone EHCI usb debug driver 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Originally written by: 6*4882a593Smuzhiyun * Eric W. Biederman" <ebiederm@xmission.com> and 7*4882a593Smuzhiyun * Yinghai Lu <yhlu.kernel@gmail.com> 8*4882a593Smuzhiyun * 9*4882a593Smuzhiyun * Changes for early/late printk and HW errata: 10*4882a593Smuzhiyun * Jason Wessel <jason.wessel@windriver.com> 11*4882a593Smuzhiyun * Copyright (C) 2009 Wind River Systems, Inc. 12*4882a593Smuzhiyun * 13*4882a593Smuzhiyun */ 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #ifndef __LINUX_USB_EHCI_DBGP_H 16*4882a593Smuzhiyun #define __LINUX_USB_EHCI_DBGP_H 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun #include <linux/console.h> 19*4882a593Smuzhiyun #include <linux/types.h> 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun /* Appendix C, Debug port ... intended for use with special "debug devices" 22*4882a593Smuzhiyun * that can help if there's no serial console. (nonstandard enumeration.) 23*4882a593Smuzhiyun */ 24*4882a593Smuzhiyun struct ehci_dbg_port { 25*4882a593Smuzhiyun u32 control; 26*4882a593Smuzhiyun #define DBGP_OWNER (1<<30) 27*4882a593Smuzhiyun #define DBGP_ENABLED (1<<28) 28*4882a593Smuzhiyun #define DBGP_DONE (1<<16) 29*4882a593Smuzhiyun #define DBGP_INUSE (1<<10) 30*4882a593Smuzhiyun #define DBGP_ERRCODE(x) (((x)>>7)&0x07) 31*4882a593Smuzhiyun # define DBGP_ERR_BAD 1 32*4882a593Smuzhiyun # define DBGP_ERR_SIGNAL 2 33*4882a593Smuzhiyun #define DBGP_ERROR (1<<6) 34*4882a593Smuzhiyun #define DBGP_GO (1<<5) 35*4882a593Smuzhiyun #define DBGP_OUT (1<<4) 36*4882a593Smuzhiyun #define DBGP_LEN(x) (((x)>>0)&0x0f) 37*4882a593Smuzhiyun u32 pids; 38*4882a593Smuzhiyun #define DBGP_PID_GET(x) (((x)>>16)&0xff) 39*4882a593Smuzhiyun #define DBGP_PID_SET(data, tok) (((data)<<8)|(tok)) 40*4882a593Smuzhiyun u32 data03; 41*4882a593Smuzhiyun u32 data47; 42*4882a593Smuzhiyun u32 address; 43*4882a593Smuzhiyun #define DBGP_EPADDR(dev, ep) (((dev)<<8)|(ep)) 44*4882a593Smuzhiyun }; 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun #ifdef CONFIG_EARLY_PRINTK_DBGP 47*4882a593Smuzhiyun extern int early_dbgp_init(char *s); 48*4882a593Smuzhiyun extern struct console early_dbgp_console; 49*4882a593Smuzhiyun #endif /* CONFIG_EARLY_PRINTK_DBGP */ 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun struct usb_hcd; 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun #ifdef CONFIG_XEN_DOM0 54*4882a593Smuzhiyun extern int xen_dbgp_reset_prep(struct usb_hcd *); 55*4882a593Smuzhiyun extern int xen_dbgp_external_startup(struct usb_hcd *); 56*4882a593Smuzhiyun #else xen_dbgp_reset_prep(struct usb_hcd * hcd)57*4882a593Smuzhiyunstatic inline int xen_dbgp_reset_prep(struct usb_hcd *hcd) 58*4882a593Smuzhiyun { 59*4882a593Smuzhiyun return 1; /* Shouldn't this be 0? */ 60*4882a593Smuzhiyun } 61*4882a593Smuzhiyun xen_dbgp_external_startup(struct usb_hcd * hcd)62*4882a593Smuzhiyunstatic inline int xen_dbgp_external_startup(struct usb_hcd *hcd) 63*4882a593Smuzhiyun { 64*4882a593Smuzhiyun return -1; 65*4882a593Smuzhiyun } 66*4882a593Smuzhiyun #endif 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun #ifdef CONFIG_EARLY_PRINTK_DBGP 69*4882a593Smuzhiyun /* Call backs from ehci host driver to ehci debug driver */ 70*4882a593Smuzhiyun extern int dbgp_external_startup(struct usb_hcd *); 71*4882a593Smuzhiyun extern int dbgp_reset_prep(struct usb_hcd *); 72*4882a593Smuzhiyun #else dbgp_reset_prep(struct usb_hcd * hcd)73*4882a593Smuzhiyunstatic inline int dbgp_reset_prep(struct usb_hcd *hcd) 74*4882a593Smuzhiyun { 75*4882a593Smuzhiyun return xen_dbgp_reset_prep(hcd); 76*4882a593Smuzhiyun } 77*4882a593Smuzhiyun dbgp_external_startup(struct usb_hcd * hcd)78*4882a593Smuzhiyunstatic inline int dbgp_external_startup(struct usb_hcd *hcd) 79*4882a593Smuzhiyun { 80*4882a593Smuzhiyun return xen_dbgp_external_startup(hcd); 81*4882a593Smuzhiyun } 82*4882a593Smuzhiyun #endif 83*4882a593Smuzhiyun 84*4882a593Smuzhiyun #endif /* __LINUX_USB_EHCI_DBGP_H */ 85