LXR linux/include/linux/usb/ehci-dbgp.h

   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 */
  23struct 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
  46extern int early_dbgp_init(char *s);
  47extern struct console early_dbgp_console;
  48#endif /* CONFIG_EARLY_PRINTK_DBGP */
  49
  50struct usb_hcd;
  51
  52#ifdef CONFIG_XEN_DOM0
  53extern int xen_dbgp_reset_prep(struct usb_hcd *);
  54extern int xen_dbgp_external_startup(struct usb_hcd *);
  55#else
  56static inline int xen_dbgp_reset_prep(struct usb_hcd *hcd)
  57{
  58        return 1; /* Shouldn't this be 0? */
  59}
  60
  61static 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 */
  69extern int dbgp_external_startup(struct usb_hcd *);
  70extern int dbgp_reset_prep(struct usb_hcd *);
  71#else
  72static inline int dbgp_reset_prep(struct usb_hcd *hcd)
  73{
  74        return xen_dbgp_reset_prep(hcd);
  75}
  76
  77static 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