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  */
  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 */