98 lines
3.0 KiB
C
98 lines
3.0 KiB
C
/*
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* Trantor T128/T128F/T228 defines
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* Note : architecturally, the T100 and T128 are different and won't work
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*
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* Copyright 1993, Drew Eckhardt
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* Visionary Computing
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* (Unix and Linux consulting and custom programming)
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* drew@colorado.edu
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* +1 (303) 440-4894
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*
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* For more information, please consult
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*
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* Trantor Systems, Ltd.
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* T128/T128F/T228 SCSI Host Adapter
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* Hardware Specifications
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*
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* Trantor Systems, Ltd.
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* 5415 Randall Place
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* Fremont, CA 94538
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* 1+ (415) 770-1400, FAX 1+ (415) 770-9910
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*/
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#ifndef T128_H
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#define T128_H
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/*
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* The trantor boards are memory mapped. They use an NCR5380 or
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* equivalent (my sample board had part second sourced from ZILOG).
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* NCR's recommended "Pseudo-DMA" architecture is used, where
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* a PAL drives the DMA signals on the 5380 allowing fast, blind
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* transfers with proper handshaking.
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*/
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/*
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* Note : a boot switch is provided for the purpose of informing the
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* firmware to boot or not boot from attached SCSI devices. So, I imagine
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* there are fewer people who've yanked the ROM like they do on the Seagate
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* to make bootup faster, and I'll probably use this for autodetection.
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*/
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#define T_ROM_OFFSET 0
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/*
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* Note : my sample board *WAS NOT* populated with the SRAM, so this
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* can't be used for autodetection without a ROM present.
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*/
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#define T_RAM_OFFSET 0x1800
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/*
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* All of the registers are allocated 32 bytes of address space, except
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* for the data register (read/write to/from the 5380 in pseudo-DMA mode)
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*/
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#define T_CONTROL_REG_OFFSET 0x1c00 /* rw */
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#define T_CR_INT 0x10 /* Enable interrupts */
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#define T_CR_CT 0x02 /* Reset watchdog timer */
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#define T_STATUS_REG_OFFSET 0x1c20 /* ro */
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#define T_ST_BOOT 0x80 /* Boot switch */
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#define T_ST_S3 0x40 /* User settable switches, */
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#define T_ST_S2 0x20 /* read 0 when switch is on, 1 off */
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#define T_ST_S1 0x10
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#define T_ST_PS2 0x08 /* Set for Microchannel 228 */
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#define T_ST_RDY 0x04 /* 5380 DRQ */
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#define T_ST_TIM 0x02 /* indicates 40us watchdog timer fired */
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#define T_ST_ZERO 0x01 /* Always zero */
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#define T_5380_OFFSET 0x1d00 /* 8 registers here, see NCR5380.h */
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#define T_DATA_REG_OFFSET 0x1e00 /* rw 512 bytes long */
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#define NCR5380_implementation_fields \
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void __iomem *base
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#define T128_address(reg) \
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(((struct NCR5380_hostdata *)shost_priv(instance))->base + T_5380_OFFSET + ((reg) * 0x20))
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#define NCR5380_read(reg) readb(T128_address(reg))
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#define NCR5380_write(reg, value) writeb((value),(T128_address(reg)))
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#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
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#define NCR5380_dma_recv_setup t128_pread
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#define NCR5380_dma_send_setup t128_pwrite
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#define NCR5380_dma_residual(instance) (0)
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#define NCR5380_intr t128_intr
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#define NCR5380_queue_command t128_queue_command
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#define NCR5380_abort t128_abort
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#define NCR5380_bus_reset t128_bus_reset
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#define NCR5380_info t128_info
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#define NCR5380_io_delay(x) udelay(x)
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/* 15 14 12 10 7 5 3
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1101 0100 1010 1000 */
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#define T128_IRQS 0xc4a8
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#endif /* T128_H */
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