xref: /openbmc/linux/arch/mips/include/asm/sgi/pi1.h (revision b2441318)
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 
9 struct 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