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pi1.h

/*
 * 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

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