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