1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * pi1.h: Definitions for SGI PI1 parallel port
4 */
5
6#ifndef _SGI_PI1_H
7#define _SGI_PI1_H
8
9struct pi1_regs {
10	u8 _data[3];
11	volatile u8 data;
12	u8 _ctrl[3];
13	volatile u8 ctrl;
14#define PI1_CTRL_STROBE_N	0x01
15#define PI1_CTRL_AFD_N		0x02
16#define PI1_CTRL_INIT_N		0x04
17#define PI1_CTRL_SLIN_N		0x08
18#define PI1_CTRL_IRQ_ENA	0x10
19#define PI1_CTRL_DIR		0x20
20#define PI1_CTRL_SEL		0x40
21	u8 _status[3];
22	volatile u8 status;
23#define PI1_STAT_DEVID		0x03	/* bits 0-1 */
24#define PI1_STAT_NOINK		0x04	/* SGI MODE only */
25#define PI1_STAT_ERROR		0x08
26#define PI1_STAT_ONLINE		0x10
27#define PI1_STAT_PE		0x20
28#define PI1_STAT_ACK		0x40
29#define PI1_STAT_BUSY		0x80
30	u8 _dmactrl[3];
31	volatile u8 dmactrl;
32#define PI1_DMACTRL_FIFO_EMPTY	0x01	/* fifo empty R/O */
33#define PI1_DMACTRL_ABORT	0x02	/* reset DMA and internal fifo W/O */
34#define PI1_DMACTRL_STDMODE	0x00	/* bits 2-3 */
35#define PI1_DMACTRL_SGIMODE	0x04	/* bits 2-3 */
36#define PI1_DMACTRL_RICOHMODE	0x08	/* bits 2-3 */
37#define PI1_DMACTRL_HPMODE	0x0c	/* bits 2-3 */
38#define PI1_DMACTRL_BLKMODE	0x10	/* block mode */
39#define PI1_DMACTRL_FIFO_CLEAR	0x20	/* clear fifo W/O */
40#define PI1_DMACTRL_READ	0x40	/* read */
41#define PI1_DMACTRL_RUN		0x80	/* pedal to the metal */
42	u8 _intstat[3];
43	volatile u8 intstat;
44#define PI1_INTSTAT_ACK		0x04
45#define PI1_INTSTAT_FEMPTY	0x08
46#define PI1_INTSTAT_NOINK	0x10
47#define PI1_INTSTAT_ONLINE	0x20
48#define PI1_INTSTAT_ERR		0x40
49#define PI1_INTSTAT_PE		0x80
50	u8 _intmask[3];
51	volatile u8 intmask;		/* enabled low, reset high*/
52#define PI1_INTMASK_ACK		0x04
53#define PI1_INTMASK_FIFO_EMPTY	0x08
54#define PI1_INTMASK_NOINK	0x10
55#define PI1_INTMASK_ONLINE	0x20
56#define PI1_INTMASK_ERR		0x40
57#define PI1_INTMASK_PE		0x80
58	u8 _timer1[3];
59	volatile u8 timer1;
60#define PI1_TIME1		0x27
61	u8 _timer2[3];
62	volatile u8 timer2;
63#define PI1_TIME2		0x13
64	u8 _timer3[3];
65	volatile u8 timer3;
66#define PI1_TIME3		0x10
67	u8 _timer4[3];
68	volatile u8 timer4;
69#define PI1_TIME4		0x00
70};
71
72#endif
73