pi1.h

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/*
 * 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