174 lines
4.6 KiB
C
174 lines
4.6 KiB
C
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/*
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* This driver adapted from Drew Eckhardt's Trantor T128 driver
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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) 666-5836
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*
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* ( Based on T128 - DISTRIBUTION RELEASE 3. )
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*
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* Modified to work with the Pro Audio Spectrum/Studio 16
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* by John Weidman.
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*
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*
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* For more information, please consult
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*
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* Media Vision
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* (510) 770-8600
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* (800) 348-7116
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*
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* and
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*
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* NCR 5380 Family
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* SCSI Protocol Controller
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* Databook
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*
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* NCR Microelectronics
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* 1635 Aeroplaza Drive
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* Colorado Springs, CO 80916
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* 1+ (719) 578-3400
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* 1+ (800) 334-5454
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*/
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#ifndef PAS16_H
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#define PAS16_H
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#define PAS16_PUBLIC_RELEASE 3
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#define PDEBUG_INIT 0x1
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#define PDEBUG_TRANSFER 0x2
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#define PAS16_DEFAULT_BASE_1 0x388
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#define PAS16_DEFAULT_BASE_2 0x384
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#define PAS16_DEFAULT_BASE_3 0x38c
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#define PAS16_DEFAULT_BASE_4 0x288
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#define PAS16_DEFAULT_BOARD_1_IRQ 10
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#define PAS16_DEFAULT_BOARD_2_IRQ 12
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#define PAS16_DEFAULT_BOARD_3_IRQ 14
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#define PAS16_DEFAULT_BOARD_4_IRQ 15
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/*
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* The Pro Audio Spectrum boards are I/O mapped. They use a Zilog 5380
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* SCSI controller, which is the equivalent of NCR's 5380. "Pseudo-DMA"
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* architecture is used, where a PAL drives the DMA signals on the 5380
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* allowing fast, blind transfers with proper handshaking.
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*/
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/* The Time-out Counter register is used to safe-guard against a stuck
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* bus (in the case of RDY driven handshake) or a stuck byte (if 16-Bit
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* DMA conversion is used). The counter uses a 28.224MHz clock
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* divided by 14 as its clock source. In the case of a stuck byte in
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* the holding register, an interrupt is generated (and mixed with the
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* one with the drive) using the CD-ROM interrupt pointer.
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*/
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#define P_TIMEOUT_COUNTER_REG 0x4000
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#define P_TC_DISABLE 0x80 /* Set to 0 to enable timeout int. */
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/* Bits D6-D0 contain timeout count */
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#define P_TIMEOUT_STATUS_REG_OFFSET 0x4001
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#define P_TS_TIM 0x80 /* check timeout status */
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/* Bits D6-D4 N/U */
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#define P_TS_ARM_DRQ_INT 0x08 /* Arm DRQ Int. When set high,
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* the next rising edge will
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* cause a CD-ROM interrupt.
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* When set low, the interrupt
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* will be cleared. There is
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* no status available for
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* this interrupt.
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*/
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#define P_TS_ENABLE_TO_ERR_INTERRUPT /* Enable timeout error int. */
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#define P_TS_ENABLE_WAIT /* Enable Wait */
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#define P_TS_CT 0x01 /* clear timeout. Note: writing
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* to this register clears the
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* timeout error int. or status
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*/
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/*
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* The data register reads/writes to/from the 5380 in pseudo-DMA mode
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*/
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#define P_DATA_REG_OFFSET 0x5c00 /* rw */
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#define P_STATUS_REG_OFFSET 0x5c01 /* ro */
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#define P_ST_RDY 0x80 /* 5380 DDRQ Status */
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#define P_IRQ_STATUS 0x5c03
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#define P_IS_IRQ 0x80 /* DIRQ status */
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#define PCB_CONFIG 0x803
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#define MASTER_ADDRESS_PTR 0x9a01 /* Fixed position - no relo */
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#define SYS_CONFIG_4 0x8003
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#define WAIT_STATE 0xbc00
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#define OPERATION_MODE_1 0xec03
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#define IO_CONFIG_3 0xf002
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#ifndef ASM
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static int pas16_abort(Scsi_Cmnd *);
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static int pas16_biosparam(struct scsi_device *, struct block_device *,
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sector_t, int*);
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static int pas16_detect(struct scsi_host_template *);
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static int pas16_queue_command(struct Scsi_Host *, struct scsi_cmnd *);
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static int pas16_bus_reset(Scsi_Cmnd *);
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#ifndef CMD_PER_LUN
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#define CMD_PER_LUN 2
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#endif
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#ifndef CAN_QUEUE
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#define CAN_QUEUE 32
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#endif
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#define NCR5380_implementation_fields \
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volatile unsigned short io_port
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#define NCR5380_local_declare() \
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volatile unsigned short io_port
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#define NCR5380_setup(instance) \
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io_port = (instance)->io_port
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#define PAS16_io_port(reg) ( io_port + pas16_offset[(reg)] )
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#if !(PDEBUG & PDEBUG_TRANSFER)
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#define NCR5380_read(reg) ( inb(PAS16_io_port(reg)) )
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#define NCR5380_write(reg, value) ( outb((value),PAS16_io_port(reg)) )
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#else
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#define NCR5380_read(reg) \
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(((unsigned char) printk("scsi%d : read register %d at io_port %04x\n"\
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, instance->hostno, (reg), PAS16_io_port(reg))), inb( PAS16_io_port(reg)) )
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#define NCR5380_write(reg, value) \
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(printk("scsi%d : write %02x to register %d at io_port %04x\n", \
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instance->hostno, (value), (reg), PAS16_io_port(reg)), \
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outb( (value),PAS16_io_port(reg) ) )
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#endif
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#define NCR5380_intr pas16_intr
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#define do_NCR5380_intr do_pas16_intr
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#define NCR5380_queue_command pas16_queue_command
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#define NCR5380_abort pas16_abort
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#define NCR5380_bus_reset pas16_bus_reset
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#define NCR5380_show_info pas16_show_info
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#define NCR5380_write_info pas16_write_info
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/* 15 14 12 10 7 5 3
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1101 0100 1010 1000 */
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#define PAS16_IRQS 0xd4a8
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#endif /* ndef ASM */
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#endif /* PAS16_H */
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