| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Chris Rorvick | b9ec1c9 | 2014-11-04 19:18:45 -0600 | [diff] [blame] | 2 | /* |
| 3 | * Standalone EHCI usb debug driver |
| 4 | * |
| 5 | * Originally written by: |
| 6 | * Eric W. Biederman" <ebiederm@xmission.com> and |
| 7 | * Yinghai Lu <yhlu.kernel@gmail.com> |
| 8 | * |
| 9 | * Changes for early/late printk and HW errata: |
| 10 | * Jason Wessel <jason.wessel@windriver.com> |
| 11 | * Copyright (C) 2009 Wind River Systems, Inc. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #ifndef __LINUX_USB_EHCI_DBGP_H |
| 16 | #define __LINUX_USB_EHCI_DBGP_H |
| 17 | |
| 18 | #include <linux/console.h> |
| 19 | #include <linux/types.h> |
| 20 | |
| 21 | /* Appendix C, Debug port ... intended for use with special "debug devices" |
| 22 | * that can help if there's no serial console. (nonstandard enumeration.) |
| 23 | */ |
| 24 | struct ehci_dbg_port { |
| 25 | u32 control; |
| 26 | #define DBGP_OWNER (1<<30) |
| 27 | #define DBGP_ENABLED (1<<28) |
| 28 | #define DBGP_DONE (1<<16) |
| 29 | #define DBGP_INUSE (1<<10) |
| 30 | #define DBGP_ERRCODE(x) (((x)>>7)&0x07) |
| 31 | # define DBGP_ERR_BAD 1 |
| 32 | # define DBGP_ERR_SIGNAL 2 |
| 33 | #define DBGP_ERROR (1<<6) |
| 34 | #define DBGP_GO (1<<5) |
| 35 | #define DBGP_OUT (1<<4) |
| 36 | #define DBGP_LEN(x) (((x)>>0)&0x0f) |
| 37 | u32 pids; |
| 38 | #define DBGP_PID_GET(x) (((x)>>16)&0xff) |
| 39 | #define DBGP_PID_SET(data, tok) (((data)<<8)|(tok)) |
| 40 | u32 data03; |
| 41 | u32 data47; |
| 42 | u32 address; |
| 43 | #define DBGP_EPADDR(dev, ep) (((dev)<<8)|(ep)) |
| 44 | }; |
| 45 | |
| 46 | #ifdef CONFIG_EARLY_PRINTK_DBGP |
| Chris Rorvick | 35a27ea | 2014-11-04 19:18:54 -0600 | [diff] [blame] | 47 | extern int early_dbgp_init(char *s); |
| Chris Rorvick | b9ec1c9 | 2014-11-04 19:18:45 -0600 | [diff] [blame] | 48 | extern struct console early_dbgp_console; |
| 49 | #endif /* CONFIG_EARLY_PRINTK_DBGP */ |
| 50 | |
| 51 | struct usb_hcd; |
| 52 | |
| 53 | #ifdef CONFIG_XEN_DOM0 |
| 54 | extern int xen_dbgp_reset_prep(struct usb_hcd *); |
| 55 | extern int xen_dbgp_external_startup(struct usb_hcd *); |
| 56 | #else |
| 57 | static inline int xen_dbgp_reset_prep(struct usb_hcd *hcd) |
| 58 | { |
| 59 | return 1; /* Shouldn't this be 0? */ |
| 60 | } |
| 61 | |
| 62 | static inline int xen_dbgp_external_startup(struct usb_hcd *hcd) |
| 63 | { |
| 64 | return -1; |
| 65 | } |
| 66 | #endif |
| 67 | |
| 68 | #ifdef CONFIG_EARLY_PRINTK_DBGP |
| 69 | /* Call backs from ehci host driver to ehci debug driver */ |
| 70 | extern int dbgp_external_startup(struct usb_hcd *); |
| 71 | extern int dbgp_reset_prep(struct usb_hcd *); |
| 72 | #else |
| 73 | static inline int dbgp_reset_prep(struct usb_hcd *hcd) |
| 74 | { |
| 75 | return xen_dbgp_reset_prep(hcd); |
| 76 | } |
| 77 | |
| 78 | static inline int dbgp_external_startup(struct usb_hcd *hcd) |
| 79 | { |
| 80 | return xen_dbgp_external_startup(hcd); |
| 81 | } |
| 82 | #endif |
| 83 | |
| 84 | #endif /* __LINUX_USB_EHCI_DBGP_H */ |