1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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 |
47 | extern int early_dbgp_init(char *s); |
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 */ |
85 | |