1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/*
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* pi1.h: Definitions for SGI PI1 parallel port
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*/
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#ifndef _SGI_PI1_H
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#define _SGI_PI1_H
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struct pi1_regs {
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u8 _data[3];
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volatile u8 data;
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u8 _ctrl[3];
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volatile u8 ctrl;
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#define PI1_CTRL_STROBE_N 0x01
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#define PI1_CTRL_AFD_N 0x02
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#define PI1_CTRL_INIT_N 0x04
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#define PI1_CTRL_SLIN_N 0x08
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#define PI1_CTRL_IRQ_ENA 0x10
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#define PI1_CTRL_DIR 0x20
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#define PI1_CTRL_SEL 0x40
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u8 _status[3];
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volatile u8 status;
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#define PI1_STAT_DEVID 0x03 /* bits 0-1 */
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#define PI1_STAT_NOINK 0x04 /* SGI MODE only */
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#define PI1_STAT_ERROR 0x08
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#define PI1_STAT_ONLINE 0x10
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#define PI1_STAT_PE 0x20
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#define PI1_STAT_ACK 0x40
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#define PI1_STAT_BUSY 0x80
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u8 _dmactrl[3];
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volatile u8 dmactrl;
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#define PI1_DMACTRL_FIFO_EMPTY 0x01 /* fifo empty R/O */
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#define PI1_DMACTRL_ABORT 0x02 /* reset DMA and internal fifo W/O */
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#define PI1_DMACTRL_STDMODE 0x00 /* bits 2-3 */
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#define PI1_DMACTRL_SGIMODE 0x04 /* bits 2-3 */
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#define PI1_DMACTRL_RICOHMODE 0x08 /* bits 2-3 */
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#define PI1_DMACTRL_HPMODE 0x0c /* bits 2-3 */
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#define PI1_DMACTRL_BLKMODE 0x10 /* block mode */
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#define PI1_DMACTRL_FIFO_CLEAR 0x20 /* clear fifo W/O */
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#define PI1_DMACTRL_READ 0x40 /* read */
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#define PI1_DMACTRL_RUN 0x80 /* pedal to the metal */
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u8 _intstat[3];
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volatile u8 intstat;
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#define PI1_INTSTAT_ACK 0x04
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#define PI1_INTSTAT_FEMPTY 0x08
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#define PI1_INTSTAT_NOINK 0x10
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#define PI1_INTSTAT_ONLINE 0x20
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#define PI1_INTSTAT_ERR 0x40
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#define PI1_INTSTAT_PE 0x80
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u8 _intmask[3];
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volatile u8 intmask; /* enabled low, reset high*/
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#define PI1_INTMASK_ACK 0x04
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#define PI1_INTMASK_FIFO_EMPTY 0x08
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#define PI1_INTMASK_NOINK 0x10
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#define PI1_INTMASK_ONLINE 0x20
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#define PI1_INTMASK_ERR 0x40
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#define PI1_INTMASK_PE 0x80
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u8 _timer1[3];
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volatile u8 timer1;
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#define PI1_TIME1 0x27
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u8 _timer2[3];
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volatile u8 timer2;
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#define PI1_TIME2 0x13
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u8 _timer3[3];
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volatile u8 timer3;
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#define PI1_TIME3 0x10
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u8 _timer4[3];
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volatile u8 timer4;
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#define PI1_TIME4 0x00
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};
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#endif
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