639 lines
18 KiB
C
639 lines
18 KiB
C
#define AUTOSENSE
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#define PSEUDO_DMA
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#define FOO
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#define UNSAFE /* Not unsafe for PAS16 -- use it */
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#define PDEBUG 0
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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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/*
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* Options :
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* AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
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* for commands that return with a CHECK CONDITION status.
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*
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* LIMIT_TRANSFERSIZE - if defined, limit the pseudo-dma transfers to 512
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* bytes at a time. Since interrupts are disabled by default during
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* these transfers, we might need this to give reasonable interrupt
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* service time if the transfer size gets too large.
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*
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* PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance
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* increase compared to polled I/O.
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*
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* PARITY - enable parity checking. Not supported.
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*
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* SCSI2 - enable support for SCSI-II tagged queueing. Untested.
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*
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* UNSAFE - leave interrupts enabled during pseudo-DMA transfers. This
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* parameter comes from the NCR5380 code. It is NOT unsafe with
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* the PAS16 and you should use it. If you don't you will have
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* a problem with dropped characters during high speed
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* communications during SCSI transfers. If you really don't
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* want to use UNSAFE you can try defining LIMIT_TRANSFERSIZE or
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* twiddle with the transfer size in the high level code.
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*
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* USLEEP - enable support for devices that don't disconnect. Untested.
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*
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* The card is detected and initialized in one of several ways :
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* 1. Autoprobe (default) - There are many different models of
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* the Pro Audio Spectrum/Studio 16, and I only have one of
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* them, so this may require a little tweaking. An interrupt
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* is triggered to autoprobe for the interrupt line. Note:
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* with the newer model boards, the interrupt is set via
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* software after reset using the default_irq for the
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* current board number.
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*
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* 2. With command line overrides - pas16=port,irq may be
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* used on the LILO command line to override the defaults.
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*
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* 3. With the PAS16_OVERRIDE compile time define. This is
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* specified as an array of address, irq tuples. Ie, for
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* one board at the default 0x388 address, IRQ10, I could say
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* -DPAS16_OVERRIDE={{0x388, 10}}
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* NOTE: Untested.
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*
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* 4. When included as a module, with arguments passed on the command line:
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* pas16_irq=xx the interrupt
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* pas16_addr=xx the port
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* e.g. "modprobe pas16 pas16_addr=0x388 pas16_irq=5"
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*
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* Note that if the override methods are used, place holders must
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* be specified for other boards in the system.
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*
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*
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* Configuration notes :
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* The current driver does not support interrupt sharing with the
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* sound portion of the card. If you use the same irq for the
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* scsi port and sound you will have problems. Either use
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* a different irq for the scsi port or don't use interrupts
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* for the scsi port.
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*
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* If you have problems with your card not being recognized, use
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* the LILO command line override. Try to get it recognized without
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* interrupts. Ie, for a board at the default 0x388 base port,
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* boot: linux pas16=0x388,255
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*
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* SCSI_IRQ_NONE (255) should be specified for no interrupt,
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* IRQ_AUTO (254) to autoprobe for an IRQ line if overridden
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* on the command line.
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*
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* (IRQ_AUTO == 254, SCSI_IRQ_NONE == 255 in NCR5380.h)
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*/
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#include <linux/module.h>
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#include <asm/system.h>
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#include <linux/signal.h>
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#include <linux/proc_fs.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/stat.h>
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#include <linux/init.h>
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#include "scsi.h"
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#include <scsi/scsi_host.h>
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#include "pas16.h"
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#define AUTOPROBE_IRQ
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#include "NCR5380.h"
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static int pas_maxi = 0;
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static int pas_wmaxi = 0;
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static unsigned short pas16_addr = 0;
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static int pas16_irq = 0;
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static const int scsi_irq_translate[] =
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{ 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
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/* The default_irqs array contains values used to set the irq into the
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* board via software (as must be done on newer model boards without
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* irq jumpers on the board). The first value in the array will be
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* assigned to logical board 0, the next to board 1, etc.
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*/
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static int default_irqs[] __initdata =
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{ PAS16_DEFAULT_BOARD_1_IRQ,
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PAS16_DEFAULT_BOARD_2_IRQ,
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PAS16_DEFAULT_BOARD_3_IRQ,
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PAS16_DEFAULT_BOARD_4_IRQ
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};
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static struct override {
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unsigned short io_port;
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int irq;
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} overrides
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#ifdef PAS16_OVERRIDE
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[] __initdata = PAS16_OVERRIDE;
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#else
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[4] __initdata = {{0,IRQ_AUTO}, {0,IRQ_AUTO}, {0,IRQ_AUTO},
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{0,IRQ_AUTO}};
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#endif
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#define NO_OVERRIDES ARRAY_SIZE(overrides)
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static struct base {
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unsigned short io_port;
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int noauto;
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} bases[] __initdata =
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{ {PAS16_DEFAULT_BASE_1, 0},
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{PAS16_DEFAULT_BASE_2, 0},
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{PAS16_DEFAULT_BASE_3, 0},
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{PAS16_DEFAULT_BASE_4, 0}
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};
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#define NO_BASES ARRAY_SIZE(bases)
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static const unsigned short pas16_offset[ 8 ] =
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{
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0x1c00, /* OUTPUT_DATA_REG */
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0x1c01, /* INITIATOR_COMMAND_REG */
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0x1c02, /* MODE_REG */
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0x1c03, /* TARGET_COMMAND_REG */
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0x3c00, /* STATUS_REG ro, SELECT_ENABLE_REG wo */
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0x3c01, /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
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0x3c02, /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
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* START_DMA_TARGET_RECEIVE_REG wo
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*/
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0x3c03, /* RESET_PARITY_INTERRUPT_REG ro,
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* START_DMA_INITIATOR_RECEIVE_REG wo
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*/
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};
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/*----------------------------------------------------------------*/
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/* the following will set the monitor border color (useful to find
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where something crashed or gets stuck at */
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/* 1 = blue
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2 = green
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3 = cyan
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4 = red
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5 = magenta
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6 = yellow
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7 = white
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*/
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#if 1
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#define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);}
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#else
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#define rtrc(i) {}
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#endif
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/*
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* Function : enable_board( int board_num, unsigned short port )
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*
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* Purpose : set address in new model board
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*
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* Inputs : board_num - logical board number 0-3, port - base address
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*
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*/
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static void __init
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enable_board( int board_num, unsigned short port )
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{
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outb( 0xbc + board_num, MASTER_ADDRESS_PTR );
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outb( port >> 2, MASTER_ADDRESS_PTR );
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}
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/*
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* Function : init_board( unsigned short port, int irq )
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*
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* Purpose : Set the board up to handle the SCSI interface
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*
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* Inputs : port - base address of the board,
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* irq - irq to assign to the SCSI port
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* force_irq - set it even if it conflicts with sound driver
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*
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*/
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static void __init
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init_board( unsigned short io_port, int irq, int force_irq )
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{
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unsigned int tmp;
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unsigned int pas_irq_code;
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/* Initialize the SCSI part of the board */
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outb( 0x30, io_port + P_TIMEOUT_COUNTER_REG ); /* Timeout counter */
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outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET ); /* Reset TC */
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outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
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NCR5380_read( RESET_PARITY_INTERRUPT_REG );
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/* Set the SCSI interrupt pointer without mucking up the sound
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* interrupt pointer in the same byte.
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*/
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pas_irq_code = ( irq < 16 ) ? scsi_irq_translate[irq] : 0;
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tmp = inb( io_port + IO_CONFIG_3 );
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if( (( tmp & 0x0f ) == pas_irq_code) && pas_irq_code > 0
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&& !force_irq )
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{
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printk( "pas16: WARNING: Can't use same irq as sound "
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"driver -- interrupts disabled\n" );
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/* Set up the drive parameters, disable 5380 interrupts */
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outb( 0x4d, io_port + SYS_CONFIG_4 );
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}
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else
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{
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tmp = ( tmp & 0x0f ) | ( pas_irq_code << 4 );
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outb( tmp, io_port + IO_CONFIG_3 );
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/* Set up the drive parameters and enable 5380 interrupts */
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outb( 0x6d, io_port + SYS_CONFIG_4 );
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}
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}
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/*
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* Function : pas16_hw_detect( unsigned short board_num )
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*
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* Purpose : determine if a pas16 board is present
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*
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* Inputs : board_num - logical board number ( 0 - 3 )
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*
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* Returns : 0 if board not found, 1 if found.
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*/
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static int __init
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pas16_hw_detect( unsigned short board_num )
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{
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unsigned char board_rev, tmp;
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unsigned short io_port = bases[ board_num ].io_port;
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/* See if we can find a PAS16 board at the address associated
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* with this logical board number.
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*/
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/* First, attempt to take a newer model board out of reset and
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* give it a base address. This shouldn't affect older boards.
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*/
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enable_board( board_num, io_port );
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/* Now see if it looks like a PAS16 board */
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board_rev = inb( io_port + PCB_CONFIG );
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if( board_rev == 0xff )
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return 0;
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tmp = board_rev ^ 0xe0;
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outb( tmp, io_port + PCB_CONFIG );
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tmp = inb( io_port + PCB_CONFIG );
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outb( board_rev, io_port + PCB_CONFIG );
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if( board_rev != tmp ) /* Not a PAS-16 */
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return 0;
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if( ( inb( io_port + OPERATION_MODE_1 ) & 0x03 ) != 0x03 )
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return 0; /* return if no SCSI interface found */
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/* Mediavision has some new model boards that return ID bits
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* that indicate a SCSI interface, but they're not (LMS). We'll
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* put in an additional test to try to weed them out.
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*/
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outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
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NCR5380_write( MODE_REG, 0x20 ); /* Is it really SCSI? */
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if( NCR5380_read( MODE_REG ) != 0x20 ) /* Write to a reg. */
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return 0; /* and try to read */
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NCR5380_write( MODE_REG, 0x00 ); /* it back. */
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if( NCR5380_read( MODE_REG ) != 0x00 )
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return 0;
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return 1;
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}
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/*
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* Function : pas16_setup(char *str, int *ints)
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*
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* Purpose : LILO command line initialization of the overrides array,
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*
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* Inputs : str - unused, ints - array of integer parameters with ints[0]
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* equal to the number of ints.
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*
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*/
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void __init pas16_setup(char *str, int *ints)
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{
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static int commandline_current = 0;
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int i;
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if (ints[0] != 2)
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printk("pas16_setup : usage pas16=io_port,irq\n");
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else
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if (commandline_current < NO_OVERRIDES) {
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overrides[commandline_current].io_port = (unsigned short) ints[1];
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overrides[commandline_current].irq = ints[2];
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for (i = 0; i < NO_BASES; ++i)
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if (bases[i].io_port == (unsigned short) ints[1]) {
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bases[i].noauto = 1;
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break;
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}
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++commandline_current;
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}
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}
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/*
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* Function : int pas16_detect(struct scsi_host_template * tpnt)
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*
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* Purpose : detects and initializes PAS16 controllers
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* that were autoprobed, overridden on the LILO command line,
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* or specified at compile time.
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*
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* Inputs : tpnt - template for this SCSI adapter.
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*
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* Returns : 1 if a host adapter was found, 0 if not.
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*
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*/
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int __init pas16_detect(struct scsi_host_template * tpnt)
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{
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static int current_override = 0;
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static unsigned short current_base = 0;
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struct Scsi_Host *instance;
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unsigned short io_port;
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int count;
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tpnt->proc_name = "pas16";
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tpnt->proc_info = &pas16_proc_info;
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if (pas16_addr != 0) {
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overrides[0].io_port = pas16_addr;
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/*
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* This is how we avoid seeing more than
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* one host adapter at the same I/O port.
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* Cribbed shamelessly from pas16_setup().
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*/
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for (count = 0; count < NO_BASES; ++count)
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if (bases[count].io_port == pas16_addr) {
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bases[count].noauto = 1;
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break;
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}
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}
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if (pas16_irq != 0)
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overrides[0].irq = pas16_irq;
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for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
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io_port = 0;
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if (overrides[current_override].io_port)
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{
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io_port = overrides[current_override].io_port;
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enable_board( current_override, io_port );
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init_board( io_port, overrides[current_override].irq, 1 );
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}
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else
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for (; !io_port && (current_base < NO_BASES); ++current_base) {
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#if (PDEBUG & PDEBUG_INIT)
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printk("scsi-pas16 : probing io_port %04x\n", (unsigned int) bases[current_base].io_port);
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#endif
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if ( !bases[current_base].noauto &&
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pas16_hw_detect( current_base ) ){
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io_port = bases[current_base].io_port;
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init_board( io_port, default_irqs[ current_base ], 0 );
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#if (PDEBUG & PDEBUG_INIT)
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printk("scsi-pas16 : detected board.\n");
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#endif
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}
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}
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#if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
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printk("scsi-pas16 : io_port = %04x\n", (unsigned int) io_port);
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#endif
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if (!io_port)
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break;
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instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
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if(instance == NULL)
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break;
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instance->io_port = io_port;
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NCR5380_init(instance, 0);
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if (overrides[current_override].irq != IRQ_AUTO)
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instance->irq = overrides[current_override].irq;
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else
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instance->irq = NCR5380_probe_irq(instance, PAS16_IRQS);
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if (instance->irq != SCSI_IRQ_NONE)
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if (request_irq(instance->irq, pas16_intr, IRQF_DISABLED,
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"pas16", instance)) {
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printk("scsi%d : IRQ%d not free, interrupts disabled\n",
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instance->host_no, instance->irq);
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instance->irq = SCSI_IRQ_NONE;
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}
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if (instance->irq == SCSI_IRQ_NONE) {
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printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
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printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
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/* Disable 5380 interrupts, leave drive params the same */
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outb( 0x4d, io_port + SYS_CONFIG_4 );
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outb( (inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3 );
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}
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#if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
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printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
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#endif
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printk("scsi%d : at 0x%04x", instance->host_no, (int)
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instance->io_port);
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if (instance->irq == SCSI_IRQ_NONE)
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printk (" interrupts disabled");
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else
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printk (" irq %d", instance->irq);
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printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
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CAN_QUEUE, CMD_PER_LUN, PAS16_PUBLIC_RELEASE);
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NCR5380_print_options(instance);
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printk("\n");
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++current_override;
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++count;
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}
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return count;
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}
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/*
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* Function : int pas16_biosparam(Disk *disk, struct block_device *dev, int *ip)
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*
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* Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
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* the specified device / size.
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*
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* Inputs : size = size of device in sectors (512 bytes), dev = block device
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* major / minor, ip[] = {heads, sectors, cylinders}
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*
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* Returns : always 0 (success), initializes ip
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|
*
|
|
*/
|
|
|
|
/*
|
|
* XXX Most SCSI boards use this mapping, I could be incorrect. Some one
|
|
* using hard disks on a trantor should verify that this mapping corresponds
|
|
* to that used by the BIOS / ASPI driver by running the linux fdisk program
|
|
* and matching the H_C_S coordinates to what DOS uses.
|
|
*/
|
|
|
|
int pas16_biosparam(struct scsi_device *sdev, struct block_device *dev,
|
|
sector_t capacity, int * ip)
|
|
{
|
|
int size = capacity;
|
|
ip[0] = 64;
|
|
ip[1] = 32;
|
|
ip[2] = size >> 11; /* I think I have it as /(32*64) */
|
|
if( ip[2] > 1024 ) { /* yes, >, not >= */
|
|
ip[0]=255;
|
|
ip[1]=63;
|
|
ip[2]=size/(63*255);
|
|
if( ip[2] > 1023 ) /* yes >1023... */
|
|
ip[2] = 1023;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function : int NCR5380_pread (struct Scsi_Host *instance,
|
|
* unsigned char *dst, int len)
|
|
*
|
|
* Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
|
|
* dst
|
|
*
|
|
* Inputs : dst = destination, len = length in bytes
|
|
*
|
|
* Returns : 0 on success, non zero on a failure such as a watchdog
|
|
* timeout.
|
|
*/
|
|
|
|
static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
|
|
int len) {
|
|
register unsigned char *d = dst;
|
|
register unsigned short reg = (unsigned short) (instance->io_port +
|
|
P_DATA_REG_OFFSET);
|
|
register int i = len;
|
|
int ii = 0;
|
|
|
|
while ( !(inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY) )
|
|
++ii;
|
|
|
|
insb( reg, d, i );
|
|
|
|
if ( inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
|
|
outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
|
|
printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
|
|
instance->host_no);
|
|
return -1;
|
|
}
|
|
if (ii > pas_maxi)
|
|
pas_maxi = ii;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function : int NCR5380_pwrite (struct Scsi_Host *instance,
|
|
* unsigned char *src, int len)
|
|
*
|
|
* Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
|
|
* src
|
|
*
|
|
* Inputs : src = source, len = length in bytes
|
|
*
|
|
* Returns : 0 on success, non zero on a failure such as a watchdog
|
|
* timeout.
|
|
*/
|
|
|
|
static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
|
|
int len) {
|
|
register unsigned char *s = src;
|
|
register unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
|
|
register int i = len;
|
|
int ii = 0;
|
|
|
|
while ( !((inb(instance->io_port + P_STATUS_REG_OFFSET)) & P_ST_RDY) )
|
|
++ii;
|
|
|
|
outsb( reg, s, i );
|
|
|
|
if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
|
|
outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
|
|
printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
|
|
instance->host_no);
|
|
return -1;
|
|
}
|
|
if (ii > pas_maxi)
|
|
pas_wmaxi = ii;
|
|
return 0;
|
|
}
|
|
|
|
#include "NCR5380.c"
|
|
|
|
static int pas16_release(struct Scsi_Host *shost)
|
|
{
|
|
if (shost->irq)
|
|
free_irq(shost->irq, shost);
|
|
NCR5380_exit(shost);
|
|
if (shost->dma_channel != 0xff)
|
|
free_dma(shost->dma_channel);
|
|
if (shost->io_port && shost->n_io_port)
|
|
release_region(shost->io_port, shost->n_io_port);
|
|
scsi_unregister(shost);
|
|
return 0;
|
|
}
|
|
|
|
static struct scsi_host_template driver_template = {
|
|
.name = "Pro Audio Spectrum-16 SCSI",
|
|
.detect = pas16_detect,
|
|
.release = pas16_release,
|
|
.queuecommand = pas16_queue_command,
|
|
.eh_abort_handler = pas16_abort,
|
|
.eh_bus_reset_handler = pas16_bus_reset,
|
|
.bios_param = pas16_biosparam,
|
|
.can_queue = CAN_QUEUE,
|
|
.this_id = 7,
|
|
.sg_tablesize = SG_ALL,
|
|
.cmd_per_lun = CMD_PER_LUN,
|
|
.use_clustering = DISABLE_CLUSTERING,
|
|
};
|
|
#include "scsi_module.c"
|
|
|
|
#ifdef MODULE
|
|
module_param(pas16_addr, ushort, 0);
|
|
module_param(pas16_irq, int, 0);
|
|
#endif
|
|
MODULE_LICENSE("GPL");
|