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
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