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8053b0ee79
Adopt the DMA implementation from atari_NCR5380.c. This means that atari_scsi and sun3_scsi can make use of the NCR5380.c core driver and the atari_NCR5380.c driver fork can be made redundant. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Hannes Reinecke <hare@suse.com> Tested-by: Michael Schmitz <schmitzmic@gmail.com> Tested-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
121 lines
3.4 KiB
C
121 lines
3.4 KiB
C
/*
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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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#ifndef PAS16_H
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#define PAS16_H
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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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#define NCR5380_implementation_fields /* none */
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#define PAS16_io_port(reg) (instance->io_port + pas16_offset[(reg)])
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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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#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
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#define NCR5380_dma_recv_setup pas16_pread
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#define NCR5380_dma_send_setup pas16_pwrite
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#define NCR5380_dma_residual(instance) (0)
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#define NCR5380_intr 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_info pas16_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 /* PAS16_H */
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