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