1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 1997 Nicolas Souchu
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29#ifndef __1284_H
30#define __1284_H
31
32/*
33 * IEEE1284 signals
34 */
35
36/* host driven signals */
37
38#define nHostClk STROBE
39#define Write STROBE
40
41#define nHostBusy AUTOFEED
42#define nHostAck AUTOFEED
43#define DStrb AUTOFEED
44
45#define nReveseRequest nINIT
46
47#define nActive1284 SELECTIN
48#define AStrb SELECTIN
49
50/* peripheral driven signals */
51
52#define nDataAvail nFAULT
53#define nPeriphRequest nFAULT
54
55#define Xflag SELECT
56
57#define AckDataReq PERROR
58#define nAckReverse PERROR
59
60#define nPtrBusy nBUSY
61#define nPeriphAck nBUSY
62#define Wait nBUSY
63
64#define PtrClk nACK
65#define PeriphClk nACK
66#define Intr nACK
67
68/* request mode values */
69#define NIBBLE_1284_NORMAL 0x0
70#define NIBBLE_1284_REQUEST_ID 0x4
71#define BYTE_1284_NORMAL 0x1
72#define BYTE_1284_REQUEST_ID 0x5
73#define ECP_1284_NORMAL 0x10
74#define ECP_1284_REQUEST_ID 0x14
75#define ECP_1284_RLE 0x30
76#define ECP_1284_RLE_REQUEST_ID 0x34
77#define EPP_1284_NORMAL 0x40
78#define EXT_LINK_1284_NORMAL 0x80
79
80/* ieee1284 mode options */
81#define PPB_REQUEST_ID 0x1
82#define PPB_USE_RLE 0x2
83#define PPB_EXTENSIBILITY_LINK 0x4
84
85/* ieee1284 errors */
86#define PPB_NO_ERROR 0
87#define PPB_MODE_UNSUPPORTED 1 /* mode not supported by peripheral */
88#define PPB_NOT_IEEE1284 2 /* not an IEEE1284 compliant periph. */
89#define PPB_TIMEOUT 3 /* timeout */
90#define PPB_INVALID_MODE 4 /* current mode is incorrect */
91
92/* ieee1284 host side states */
93#define PPB_ERROR 0
94#define PPB_FORWARD_IDLE 1
95#define PPB_NEGOCIATION 2
96#define PPB_SETUP 3
97#define PPB_ECP_FORWARD_IDLE 4
98#define PPB_FWD_TO_REVERSE 5
99#define PPB_REVERSE_IDLE 6
100#define PPB_REVERSE_TRANSFER 7
101#define PPB_REVERSE_TO_FWD 8
102#define PPB_EPP_IDLE 9
103#define PPB_TERMINATION 10
104
105/* peripheral side states */
106#define PPB_PERIPHERAL_NEGOCIATION 11
107#define PPB_PERIPHERAL_IDLE 12
108#define PPB_PERIPHERAL_TRANSFER 13
109#define PPB_PERIPHERAL_TERMINATION 14
110
111extern int nibble_1284_inbyte(device_t, char *);
112extern int byte_1284_inbyte(device_t, char *);
113extern int spp_1284_read(device_t, int, char *, int, int *);
114
115extern int ppb_1284_negociate(device_t, int, int);
116extern int ppb_1284_terminate(device_t);
117extern int ppb_1284_read_id(device_t, int, char *, int, int *);
118extern int ppb_1284_read(device_t, int, char *, int, int *);
119extern int ppb_1284_get_state(device_t bus);
120extern int ppb_1284_set_state(device_t bus, int state);
121
122extern int ppb_peripheral_terminate(device_t, int);
123extern int ppb_peripheral_negociate(device_t, int, int);
124extern int byte_peripheral_write(device_t, char *, int, int *);
125
126#endif