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/*

 * This driver adapted from Drew Eckhardt's Trantor T128 driver

 *

 * Copyright 1993, Drew Eckhardt

 *      Visionary Computing

 *      (Unix and Linux consulting and custom programming)

 *      drew@colorado.edu

 *      +1 (303) 666-5836

 *

 *  ( Based on T128 - DISTRIBUTION RELEASE 3. )

 *

 * Modified to work with the Pro Audio Spectrum/Studio 16

 * by John Weidman.

 *

 *

 * For more information, please consult

 *

 * Media Vision

 * (510) 770-8600

 * (800) 348-7116

 *

 * and

 *

 * NCR 5380 Family

 * SCSI Protocol Controller

 * Databook

 *

 * NCR Microelectronics

 * 1635 Aeroplaza Drive

 * Colorado Springs, CO 80916

 * 1+ (719) 578-3400

 * 1+ (800) 334-5454

 */

#ifndef PAS16_H

#define PAS16_H

#define PAS16_PUBLIC_RELEASE 3

#define PDEBUG_INIT     0x1

#define PDEBUG_TRANSFER 0x2

#define PAS16_DEFAULT_BASE_1  0x388

#define PAS16_DEFAULT_BASE_2  0x384

#define PAS16_DEFAULT_BASE_3  0x38c

#define PAS16_DEFAULT_BASE_4  0x288

#define PAS16_DEFAULT_BOARD_1_IRQ 10

#define PAS16_DEFAULT_BOARD_2_IRQ 12

#define PAS16_DEFAULT_BOARD_3_IRQ 14

#define PAS16_DEFAULT_BOARD_4_IRQ 15

/*

 * The Pro Audio Spectrum boards are I/O mapped. They use a Zilog 5380

 * SCSI controller, which is the equivalent of NCR's 5380.  "Pseudo-DMA"

 * architecture is used, where a PAL drives the DMA signals on the 5380

 * allowing fast, blind transfers with proper handshaking.

 */

/* The Time-out Counter register is used to safe-guard against a stuck

 * bus (in the case of RDY driven handshake) or a stuck byte (if 16-Bit

 * DMA conversion is used).  The counter uses a 28.224MHz clock

 * divided by 14 as its clock source.  In the case of a stuck byte in

 * the holding register, an interrupt is generated (and mixed with the

 * one with the drive) using the CD-ROM interrupt pointer.

 */

#define P_TIMEOUT_COUNTER_REG   0x4000

#define P_TC_DISABLE    0x80    /* Set to 0 to enable timeout int. */

                                /* Bits D6-D0 contain timeout count */

#define P_TIMEOUT_STATUS_REG_OFFSET     0x4001

#define P_TS_TIM                0x80    /* check timeout status */

                                        /* Bits D6-D4 N/U */

#define P_TS_ARM_DRQ_INT        0x08    /* Arm DRQ Int.  When set high,

                                         * the next rising edge will

                                         * cause a CD-ROM interrupt.

                                         * When set low, the interrupt

                                         * will be cleared.  There is

                                         * no status available for

                                         * this interrupt.

                                         */

#define P_TS_ENABLE_TO_ERR_INTERRUPT    /* Enable timeout error int. */

#define P_TS_ENABLE_WAIT                /* Enable Wait */

#define P_TS_CT                 0x01    /* clear timeout. Note: writing

                                         * to this register clears the

                                         * timeout error int. or status

                                         */

/*

 * The data register reads/writes to/from the 5380 in pseudo-DMA mode

 */

#define P_DATA_REG_OFFSET       0x5c00  /* rw */

#define P_STATUS_REG_OFFSET     0x5c01  /* ro */

#define P_ST_RDY                0x80    /* 5380 DDRQ Status */

#define P_IRQ_STATUS            0x5c03

#define P_IS_IRQ                0x80    /* DIRQ status */

#define PCB_CONFIG 0x803

#define MASTER_ADDRESS_PTR 0x9a01  /* Fixed position - no relo */

#define SYS_CONFIG_4 0x8003

#define WAIT_STATE 0xbc00

#define OPERATION_MODE_1 0xec03

#define IO_CONFIG_3 0xf002

#ifndef ASM

int pas16_abort(Scsi_Cmnd *);

int pas16_biosparam(Disk *, kdev_t, int*);

int pas16_detect(Scsi_Host_Template *);

int pas16_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));

int pas16_reset(Scsi_Cmnd *, unsigned int);

int pas16_proc_info (char *buffer ,char **start, off_t offset,

                     int length, int hostno, int inout);

#ifndef NULL

#define NULL 0

#endif

#ifndef CMD_PER_LUN

#define CMD_PER_LUN 2

#endif

#ifndef CAN_QUEUE

#define CAN_QUEUE 32 

#endif

/*

 * I hadn't thought of this with the earlier drivers - but to prevent

 * macro definition conflicts, we shouldn't define all of the internal

 * macros when this is being used solely for the host stub.

 */

#if defined(HOSTS_C) || defined(MODULE)

#define MV_PAS16 {NULL, NULL, NULL, NULL, \

        "Pro Audio Spectrum-16 SCSI",           \

        pas16_detect, NULL, NULL,                                       \

        NULL, pas16_queue_command, pas16_abort, pas16_reset, NULL,      \

        pas16_biosparam,                                                \

        /* can queue */ CAN_QUEUE, /* id */ 7, SG_ALL,                  \

        /* cmd per lun */ CMD_PER_LUN , 0, 0, DISABLE_CLUSTERING}

#endif

#ifndef HOSTS_C

#define NCR5380_implementation_fields \

    volatile unsigned short io_port

#define NCR5380_local_declare() \

    volatile unsigned short io_port

#define NCR5380_setup(instance) \

    io_port = (instance)->io_port

#define PAS16_io_port(reg) ( io_port + pas16_offset[(reg)] )

#if !(PDEBUG & PDEBUG_TRANSFER) 

#define NCR5380_read(reg) ( inb(PAS16_io_port(reg)) )

#define NCR5380_write(reg, value) ( outb((value),PAS16_io_port(reg)) )

#else

#define NCR5380_read(reg)                                               \

    (((unsigned char) printk("scsi%d : read register %d at io_port %04x\n"\

    , instance->hostno, (reg), PAS16_io_port(reg))), inb( PAS16_io_port(reg)) )

#define NCR5380_write(reg, value)                                       \

    (printk("scsi%d : write %02x to register %d at io_port %04x\n",     \

            instance->hostno, (value), (reg), PAS16_io_port(reg)),      \

    outb( (value),PAS16_io_port(reg) ) )

#endif

#define NCR5380_intr pas16_intr

#define NCR5380_queue_command pas16_queue_command

#define NCR5380_abort pas16_abort

#define NCR5380_reset pas16_reset

#define NCR5380_proc_info pas16_proc_info

/* 15 14 12 10 7 5 3

   1101 0100 1010 1000 */

#define PAS16_IRQS 0xd4a8 

#endif /* else def HOSTS_C */

#endif /* ndef ASM */

#endif /* PAS16_H */