File Content: pi1.h /* SPDX-License-Identifier: GPL-2.0 */ /* * pi1.h: Definitions for SGI PI1 parallel port */ #ifndef _SGI_PI1_H #define _SGI_PI1_H struct pi1_regs { u8 _data[3]; volatile u8 data; u8 _ctrl[3]; volatile u8 ctrl; #define PI1_CTRL_STROBE_N 0x01 #define PI1_CTRL_AFD_N 0x02 #define PI1_CTRL_INIT_N 0x04 #define PI1_CTRL_SLIN_N 0x08 #define PI1_CTRL_IRQ_ENA 0x10 #define PI1_CTRL_DIR 0x20 #define PI1_CTRL_SEL 0x40 u8 _status[3]; volatile u8 status; #define PI1_STAT_DEVID 0x03 /* bits 0-1 */ #define PI1_STAT_NOINK 0x04 /* SGI MODE only */ #define PI1_STAT_ERROR 0x08 #define PI1_STAT_ONLINE 0x10 #define PI1_STAT_PE 0x20 #define PI1_STAT_ACK 0x40 #define PI1_STAT_BUSY 0x80 u8 _dmactrl[3]; volatile u8 dmactrl; #define PI1_DMACTRL_FIFO_EMPTY 0x01 /* fifo empty R/O */ #define PI1_DMACTRL_ABORT 0x02 /* reset DMA and internal fifo W/O */ #define PI1_DMACTRL_STDMODE 0x00 /* bits 2-3 */ #define PI1_DMACTRL_SGIMODE 0x04 /* bits 2-3 */ #define PI1_DMACTRL_RICOHMODE 0x08 /* bits 2-3 */ #define PI1_DMACTRL_HPMODE 0x0c /* bits 2-3 */ #define PI1_DMACTRL_BLKMODE 0x10 /* block mode */ #define PI1_DMACTRL_FIFO_CLEAR 0x20 /* clear fifo W/O */ #define PI1_DMACTRL_READ 0x40 /* read */ #define PI1_DMACTRL_RUN 0x80 /* pedal to the metal */ u8 _intstat[3]; volatile u8 intstat; #define PI1_INTSTAT_ACK 0x04 #define PI1_INTSTAT_FEMPTY 0x08 #define PI1_INTSTAT_NOINK 0x10 #define PI1_INTSTAT_ONLINE 0x20 #define PI1_INTSTAT_ERR 0x40 #define PI1_INTSTAT_PE 0x80 u8 _intmask[3]; volatile u8 intmask; /* enabled low, reset high*/ #define PI1_INTMASK_ACK 0x04 #define PI1_INTMASK_FIFO_EMPTY 0x08 #define PI1_INTMASK_NOINK 0x10 #define PI1_INTMASK_ONLINE 0x20 #define PI1_INTMASK_ERR 0x40 #define PI1_INTMASK_PE 0x80 u8 _timer1[3]; volatile u8 timer1; #define PI1_TIME1 0x27 u8 _timer2[3]; volatile u8 timer2; #define PI1_TIME2 0x13 u8 _timer3[3]; volatile u8 timer3; #define PI1_TIME3 0x10 u8 _timer4[3]; volatile u8 timer4; #define PI1_TIME4 0x00 }; #endif Submit