include/linux/usb/ehci_def.h - kernel/msm-4.9 - Gitiles

 /*
  * Copyright (c) 2001-2002 by David Brownell
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
  * Free Software Foundation; either version 2 of the License, or (at your
  * option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software Foundation,
  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */

 #ifndef __LINUX_USB_EHCI_DEF_H
 #define __LINUX_USB_EHCI_DEF_H

 /* EHCI register interface, corresponds to EHCI Revision 0.95 specification */

 /* Section 2.2 Host Controller Capability Registers */
 struct ehci_caps {
 	/* these fields are specified as 8 and 16 bit registers,
 	 * but some hosts can't perform 8 or 16 bit PCI accesses.
 	 * some hosts treat caplength and hciversion as parts of a 32-bit
 	 * register, others treat them as two separate registers, this
 	 * affects the memory map for big endian controllers.
 	 */
 	u32		hc_capbase;
 #define HC_LENGTH(ehci, p)	(0x00ff&((p) >> /* bits 7:0 / offset 00h */ \
 				(ehci_big_endian_capbase(ehci) ? 24 : 0)))
 #define HC_VERSION(ehci, p)	(0xffff&((p) >> /* bits 31:16 / offset 02h */ \
 				(ehci_big_endian_capbase(ehci) ? 0 : 16)))
 	u32		hcs_params;     /* HCSPARAMS - offset 0x4 */
 #define HCS_DEBUG_PORT(p)	(((p)>>20)&0xf)	/* bits 23:20, debug port? */
 #define HCS_INDICATOR(p)	((p)&(1 << 16))	/* true: has port indicators */
 #define HCS_N_CC(p)		(((p)>>12)&0xf)	/* bits 15:12, #companion HCs */
 #define HCS_N_PCC(p)		(((p)>>8)&0xf)	/* bits 11:8, ports per CC */
 #define HCS_PORTROUTED(p)	((p)&(1 << 7))	/* true: port routing */
 #define HCS_PPC(p)		((p)&(1 << 4))	/* true: port power control */
 #define HCS_N_PORTS(p)		(((p)>>0)&0xf)	/* bits 3:0, ports on HC */

 	u32		hcc_params;      /* HCCPARAMS - offset 0x8 */
 /* EHCI 1.1 addendum */
 #define HCC_32FRAME_PERIODIC_LIST(p)	((p)&(1 << 19))
 #define HCC_PER_PORT_CHANGE_EVENT(p)	((p)&(1 << 18))
 #define HCC_LPM(p)			((p)&(1 << 17))
 #define HCC_HW_PREFETCH(p)		((p)&(1 << 16))

 #define HCC_EXT_CAPS(p)		(((p)>>8)&0xff)	/* for pci extended caps */
 #define HCC_ISOC_CACHE(p)       ((p)&(1 << 7))  /* true: can cache isoc frame */
 #define HCC_ISOC_THRES(p)       (((p)>>4)&0x7)  /* bits 6:4, uframes cached */
 #define HCC_CANPARK(p)		((p)&(1 << 2))  /* true: can park on async qh */
 #define HCC_PGM_FRAMELISTLEN(p) ((p)&(1 << 1))  /* true: periodic_size changes*/
 #define HCC_64BIT_ADDR(p)       ((p)&(1))       /* true: can use 64-bit addr */
 	u8		portroute[8];	 /* nibbles for routing - offset 0xC */
 };


 /* Section 2.3 Host Controller Operational Registers */
 struct ehci_regs {

 	/* USBCMD: offset 0x00 */
 	u32		command;

 /* EHCI 1.1 addendum */
 #define CMD_HIRD	(0xf<<24)	/* host initiated resume duration */
 #define CMD_PPCEE	(1<<15)		/* per port change event enable */
 #define CMD_FSP		(1<<14)		/* fully synchronized prefetch */
 #define CMD_ASPE	(1<<13)		/* async schedule prefetch enable */
 #define CMD_PSPE	(1<<12)		/* periodic schedule prefetch enable */
 /* 23:16 is r/w intr rate, in microframes; default "8" == 1/msec */
 #define CMD_PARK	(1<<11)		/* enable "park" on async qh */
 #define CMD_PARK_CNT(c)	(((c)>>8)&3)	/* how many transfers to park for */
 #define CMD_LRESET	(1<<7)		/* partial reset (no ports, etc) */
 #define CMD_IAAD	(1<<6)		/* "doorbell" interrupt async advance */
 #define CMD_ASE		(1<<5)		/* async schedule enable */
 #define CMD_PSE		(1<<4)		/* periodic schedule enable */
 /* 3:2 is periodic frame list size */
 #define CMD_RESET	(1<<1)		/* reset HC not bus */
 #define CMD_RUN		(1<<0)		/* start/stop HC */

 	/* USBSTS: offset 0x04 */
 	u32		status;
 #define STS_PPCE_MASK	(0xff<<16)	/* Per-Port change event 1-16 */
 #define STS_ASS		(1<<15)		/* Async Schedule Status */
 #define STS_PSS		(1<<14)		/* Periodic Schedule Status */
 #define STS_RECL	(1<<13)		/* Reclamation */
 #define STS_HALT	(1<<12)		/* Not running (any reason) */
 /* some bits reserved */
 	/* these STS_* flags are also intr_enable bits (USBINTR) */
 #define STS_IAA		(1<<5)		/* Interrupted on async advance */
 #define STS_FATAL	(1<<4)		/* such as some PCI access errors */
 #define STS_FLR		(1<<3)		/* frame list rolled over */
 #define STS_PCD		(1<<2)		/* port change detect */
 #define STS_ERR		(1<<1)		/* "error" completion (overflow, ...) */
 #define STS_INT		(1<<0)		/* "normal" completion (short, ...) */

 	/* USBINTR: offset 0x08 */
 	u32		intr_enable;

 	/* FRINDEX: offset 0x0C */
 	u32		frame_index;	/* current microframe number */
 	/* CTRLDSSEGMENT: offset 0x10 */
 	u32		segment;	/* address bits 63:32 if needed */
 	/* PERIODICLISTBASE: offset 0x14 */
 	u32		frame_list;	/* points to periodic list */
 	/* ASYNCLISTADDR: offset 0x18 */
 	u32		async_next;	/* address of next async queue head */

 	u32		reserved1[2];

 	/* TXFILLTUNING: offset 0x24 */
 	u32		txfill_tuning;	/* TX FIFO Tuning register */
 #define TXFIFO_DEFAULT	(8<<16)		/* FIFO burst threshold 8 */

 	u32		reserved2[6];

 	/* CONFIGFLAG: offset 0x40 */
 	u32		configured_flag;
 #define FLAG_CF		(1<<0)		/* true: we'll support "high speed" */

 	/* PORTSC: offset 0x44 */
 	u32		port_status[0];	/* up to N_PORTS */
 /* EHCI 1.1 addendum */
 #define PORTSC_SUSPEND_STS_ACK 0
 #define PORTSC_SUSPEND_STS_NYET 1
 #define PORTSC_SUSPEND_STS_STALL 2
 #define PORTSC_SUSPEND_STS_ERR 3

 #define PORT_DEV_ADDR	(0x7f<<25)		/* device address */
 #define PORT_SSTS	(0x3<<23)		/* suspend status */
 /* 31:23 reserved */
 #define PORT_WKOC_E	(1<<22)		/* wake on overcurrent (enable) */
 #define PORT_WKDISC_E	(1<<21)		/* wake on disconnect (enable) */
 #define PORT_WKCONN_E	(1<<20)		/* wake on connect (enable) */
 /* 19:16 for port testing */
 #define PORT_TEST(x)	(((x)&0xf)<<16)	/* Port Test Control */
 #define PORT_TEST_PKT	PORT_TEST(0x4)	/* Port Test Control - packet test */
 #define PORT_TEST_FORCE	PORT_TEST(0x5)	/* Port Test Control - force enable */
 #define PORT_LED_OFF	(0<<14)
 #define PORT_LED_AMBER	(1<<14)
 #define PORT_LED_GREEN	(2<<14)
 #define PORT_LED_MASK	(3<<14)
 #define PORT_OWNER	(1<<13)		/* true: companion hc owns this port */
 #define PORT_POWER	(1<<12)		/* true: has power (see PPC) */
 #define PORT_USB11(x) (((x)&(3<<10)) == (1<<10))	/* USB 1.1 device */
 /* 11:10 for detecting lowspeed devices (reset vs release ownership) */
 /* 9 reserved */
 #define PORT_LPM	(1<<9)		/* LPM transaction */
 #define PORT_RESET	(1<<8)		/* reset port */
 #define PORT_SUSPEND	(1<<7)		/* suspend port */
 #define PORT_RESUME	(1<<6)		/* resume it */
 #define PORT_OCC	(1<<5)		/* over current change */
 #define PORT_OC		(1<<4)		/* over current active */
 #define PORT_PEC	(1<<3)		/* port enable change */
 #define PORT_PE		(1<<2)		/* port enable */
 #define PORT_CSC	(1<<1)		/* connect status change */
 #define PORT_CONNECT	(1<<0)		/* device connected */
 #define PORT_RWC_BITS   (PORT_CSC | PORT_PEC | PORT_OCC)

 	u32		reserved3[9];

 	/* USBMODE: offset 0x68 */
 	u32		usbmode;	/* USB Device mode */
 #define USBMODE_SDIS	(1<<3)		/* Stream disable */
 #define USBMODE_BE	(1<<2)		/* BE/LE endianness select */
 #define USBMODE_CM_HC	(3<<0)		/* host controller mode */
 #define USBMODE_CM_IDLE	(0<<0)		/* idle state */

 	u32		reserved4[6];

 /* Moorestown has some non-standard registers, partially due to the fact that
  * its EHCI controller has both TT and LPM support. HOSTPCx are extensions to
  * PORTSCx
  */
 	/* HOSTPC: offset 0x84 */
 	u32		hostpc[1];	/* HOSTPC extension */
 #define HOSTPC_PHCD	(1<<22)		/* Phy clock disable */
 #define HOSTPC_PSPD	(3<<25)		/* Port speed detection */

 	u32		reserved5[16];

 	/* USBMODE_EX: offset 0xc8 */
 	u32		usbmode_ex;	/* USB Device mode extension */
 #define USBMODE_EX_VBPS	(1<<5)		/* VBus Power Select On */
 #define USBMODE_EX_HC	(3<<0)		/* host controller mode */
 };

 /* 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
 #include <linux/init.h>
 extern int __init 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 *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_DEF_H */
	/*
	* Copyright (c) 2001-2002 by David Brownell
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License as published by the
	* Free Software Foundation; either version 2 of the License, or (at your
	* option) any later version.
	*
	* This program is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
	* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software Foundation,
	* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	*/

	#ifndef __LINUX_USB_EHCI_DEF_H
	#define __LINUX_USB_EHCI_DEF_H

	/* EHCI register interface, corresponds to EHCI Revision 0.95 specification */

	/* Section 2.2 Host Controller Capability Registers */
	struct ehci_caps {
	/* these fields are specified as 8 and 16 bit registers,
	* but some hosts can't perform 8 or 16 bit PCI accesses.
	* some hosts treat caplength and hciversion as parts of a 32-bit
	* register, others treat them as two separate registers, this
	* affects the memory map for big endian controllers.
	*/
	u32 hc_capbase;
	#define HC_LENGTH(ehci, p) (0x00ff&((p) >> /* bits 7:0 / offset 00h */ \
	(ehci_big_endian_capbase(ehci) ? 24 : 0)))
	#define HC_VERSION(ehci, p) (0xffff&((p) >> /* bits 31:16 / offset 02h */ \
	(ehci_big_endian_capbase(ehci) ? 0 : 16)))
	u32 hcs_params; /* HCSPARAMS - offset 0x4 */
	#define HCS_DEBUG_PORT(p) (((p)>>20)&0xf) /* bits 23:20, debug port? */
	#define HCS_INDICATOR(p) ((p)&(1 << 16)) /* true: has port indicators */
	#define HCS_N_CC(p) (((p)>>12)&0xf) /* bits 15:12, #companion HCs */
	#define HCS_N_PCC(p) (((p)>>8)&0xf) /* bits 11:8, ports per CC */
	#define HCS_PORTROUTED(p) ((p)&(1 << 7)) /* true: port routing */
	#define HCS_PPC(p) ((p)&(1 << 4)) /* true: port power control */
	#define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */

	u32 hcc_params; /* HCCPARAMS - offset 0x8 */
	/* EHCI 1.1 addendum */
	#define HCC_32FRAME_PERIODIC_LIST(p) ((p)&(1 << 19))
	#define HCC_PER_PORT_CHANGE_EVENT(p) ((p)&(1 << 18))
	#define HCC_LPM(p) ((p)&(1 << 17))
	#define HCC_HW_PREFETCH(p) ((p)&(1 << 16))

	#define HCC_EXT_CAPS(p) (((p)>>8)&0xff) /* for pci extended caps */
	#define HCC_ISOC_CACHE(p) ((p)&(1 << 7)) /* true: can cache isoc frame */
	#define HCC_ISOC_THRES(p) (((p)>>4)&0x7) /* bits 6:4, uframes cached */
	#define HCC_CANPARK(p) ((p)&(1 << 2)) /* true: can park on async qh */
	#define HCC_PGM_FRAMELISTLEN(p) ((p)&(1 << 1)) /* true: periodic_size changes*/
	#define HCC_64BIT_ADDR(p) ((p)&(1)) /* true: can use 64-bit addr */
	u8 portroute[8]; /* nibbles for routing - offset 0xC */
	};


	/* Section 2.3 Host Controller Operational Registers */
	struct ehci_regs {

	/* USBCMD: offset 0x00 */
	u32 command;

	/* EHCI 1.1 addendum */
	#define CMD_HIRD (0xf<<24) /* host initiated resume duration */
	#define CMD_PPCEE (1<<15) /* per port change event enable */
	#define CMD_FSP (1<<14) /* fully synchronized prefetch */
	#define CMD_ASPE (1<<13) /* async schedule prefetch enable */
	#define CMD_PSPE (1<<12) /* periodic schedule prefetch enable */
	/* 23:16 is r/w intr rate, in microframes; default "8" == 1/msec */
	#define CMD_PARK (1<<11) /* enable "park" on async qh */
	#define CMD_PARK_CNT(c) (((c)>>8)&3) /* how many transfers to park for */
	#define CMD_LRESET (1<<7) /* partial reset (no ports, etc) */
	#define CMD_IAAD (1<<6) /* "doorbell" interrupt async advance */
	#define CMD_ASE (1<<5) /* async schedule enable */
	#define CMD_PSE (1<<4) /* periodic schedule enable */
	/* 3:2 is periodic frame list size */
	#define CMD_RESET (1<<1) /* reset HC not bus */
	#define CMD_RUN (1<<0) /* start/stop HC */

	/* USBSTS: offset 0x04 */
	u32 status;
	#define STS_PPCE_MASK (0xff<<16) /* Per-Port change event 1-16 */
	#define STS_ASS (1<<15) /* Async Schedule Status */
	#define STS_PSS (1<<14) /* Periodic Schedule Status */
	#define STS_RECL (1<<13) /* Reclamation */
	#define STS_HALT (1<<12) /* Not running (any reason) */
	/* some bits reserved */
	/* these STS_* flags are also intr_enable bits (USBINTR) */
	#define STS_IAA (1<<5) /* Interrupted on async advance */
	#define STS_FATAL (1<<4) /* such as some PCI access errors */
	#define STS_FLR (1<<3) /* frame list rolled over */
	#define STS_PCD (1<<2) /* port change detect */
	#define STS_ERR (1<<1) /* "error" completion (overflow, ...) */
	#define STS_INT (1<<0) /* "normal" completion (short, ...) */

	/* USBINTR: offset 0x08 */
	u32 intr_enable;

	/* FRINDEX: offset 0x0C */
	u32 frame_index; /* current microframe number */
	/* CTRLDSSEGMENT: offset 0x10 */
	u32 segment; /* address bits 63:32 if needed */
	/* PERIODICLISTBASE: offset 0x14 */
	u32 frame_list; /* points to periodic list */
	/* ASYNCLISTADDR: offset 0x18 */
	u32 async_next; /* address of next async queue head */

	u32 reserved1[2];

	/* TXFILLTUNING: offset 0x24 */
	u32 txfill_tuning; /* TX FIFO Tuning register */
	#define TXFIFO_DEFAULT (8<<16) /* FIFO burst threshold 8 */

	u32 reserved2[6];

	/* CONFIGFLAG: offset 0x40 */
	u32 configured_flag;
	#define FLAG_CF (1<<0) /* true: we'll support "high speed" */

	/* PORTSC: offset 0x44 */
	u32 port_status[0]; /* up to N_PORTS */
	/* EHCI 1.1 addendum */
	#define PORTSC_SUSPEND_STS_ACK 0
	#define PORTSC_SUSPEND_STS_NYET 1
	#define PORTSC_SUSPEND_STS_STALL 2
	#define PORTSC_SUSPEND_STS_ERR 3

	#define PORT_DEV_ADDR (0x7f<<25) /* device address */
	#define PORT_SSTS (0x3<<23) /* suspend status */
	/* 31:23 reserved */
	#define PORT_WKOC_E (1<<22) /* wake on overcurrent (enable) */
	#define PORT_WKDISC_E (1<<21) /* wake on disconnect (enable) */
	#define PORT_WKCONN_E (1<<20) /* wake on connect (enable) */
	/* 19:16 for port testing */
	#define PORT_TEST(x) (((x)&0xf)<<16) /* Port Test Control */
	#define PORT_TEST_PKT PORT_TEST(0x4) /* Port Test Control - packet test */
	#define PORT_TEST_FORCE PORT_TEST(0x5) /* Port Test Control - force enable */
	#define PORT_LED_OFF (0<<14)
	#define PORT_LED_AMBER (1<<14)
	#define PORT_LED_GREEN (2<<14)
	#define PORT_LED_MASK (3<<14)
	#define PORT_OWNER (1<<13) /* true: companion hc owns this port */
	#define PORT_POWER (1<<12) /* true: has power (see PPC) */
	#define PORT_USB11(x) (((x)&(3<<10)) == (1<<10)) /* USB 1.1 device */
	/* 11:10 for detecting lowspeed devices (reset vs release ownership) */
	/* 9 reserved */
	#define PORT_LPM (1<<9) /* LPM transaction */
	#define PORT_RESET (1<<8) /* reset port */
	#define PORT_SUSPEND (1<<7) /* suspend port */
	#define PORT_RESUME (1<<6) /* resume it */
	#define PORT_OCC (1<<5) /* over current change */
	#define PORT_OC (1<<4) /* over current active */
	#define PORT_PEC (1<<3) /* port enable change */
	#define PORT_PE (1<<2) /* port enable */
	#define PORT_CSC (1<<1) /* connect status change */
	#define PORT_CONNECT (1<<0) /* device connected */
	#define PORT_RWC_BITS (PORT_CSC \| PORT_PEC \| PORT_OCC)

	u32 reserved3[9];

	/* USBMODE: offset 0x68 */
	u32 usbmode; /* USB Device mode */
	#define USBMODE_SDIS (1<<3) /* Stream disable */
	#define USBMODE_BE (1<<2) /* BE/LE endianness select */
	#define USBMODE_CM_HC (3<<0) /* host controller mode */
	#define USBMODE_CM_IDLE (0<<0) /* idle state */

	u32 reserved4[6];

	/* Moorestown has some non-standard registers, partially due to the fact that
	* its EHCI controller has both TT and LPM support. HOSTPCx are extensions to
	* PORTSCx
	*/
	/* HOSTPC: offset 0x84 */
	u32 hostpc[1]; /* HOSTPC extension */
	#define HOSTPC_PHCD (1<<22) /* Phy clock disable */
	#define HOSTPC_PSPD (3<<25) /* Port speed detection */

	u32 reserved5[16];

	/* USBMODE_EX: offset 0xc8 */
	u32 usbmode_ex; /* USB Device mode extension */
	#define USBMODE_EX_VBPS (1<<5) /* VBus Power Select On */
	#define USBMODE_EX_HC (3<<0) /* host controller mode */
	};

	/* 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
	#include <linux/init.h>
	extern int __init 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 *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_DEF_H */