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