448 lines
12 KiB
C
448 lines
12 KiB
C
#define AUTOSENSE
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#define PSEUDO_DMA
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/*
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* Trantor T128/T128F/T228 driver
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* Note : architecturally, the T100 and T130 are different and won't
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* 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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* DISTRIBUTION RELEASE 3.
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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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* 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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* 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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*
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* UNSAFE - leave interrupts enabled during pseudo-DMA transfers. You
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* only really want to use this if you're having a problem with
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* dropped characters during high speed communications, and even
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* then, you're going to be better off twiddling with transfersize.
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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) - since the board is memory mapped,
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* a BIOS signature is scanned for to locate the registers.
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* An interrupt is triggered to autoprobe for the interrupt
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* line.
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*
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* 2. With command line overrides - t128=address,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 T128_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 0xcc000 address, IRQ5, I could say
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* -DT128_OVERRIDE={{0xcc000, 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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* T128/T128F jumper/dipswitch settings (note : on my sample, the switches
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* were epoxy'd shut, meaning I couldn't change the 0xcc000 base address) :
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*
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* T128 Sw7 Sw8 Sw6 = 0ws Sw5 = boot
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* T128F Sw6 Sw7 Sw5 = 0ws Sw4 = boot Sw8 = floppy disable
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* cc000 off off
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* c8000 off on
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* dc000 on off
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* d8000 on on
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*
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*
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* Interrupts
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* There is a 12 pin jumper block, jp1, numbered as follows :
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* T128 (JP1) T128F (J5)
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* 2 4 6 8 10 12 11 9 7 5 3 1
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* 1 3 5 7 9 11 12 10 8 6 4 2
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*
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* 3 2-4
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* 5 1-3
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* 7 3-5
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* T128F only
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* 10 8-10
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* 12 7-9
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* 14 10-12
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* 15 9-11
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*/
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/*
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* $Log: t128.c,v $
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*/
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#include <asm/system.h>
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#include <linux/signal.h>
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#include <linux/io.h>
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#include <linux/blkdev.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 <linux/module.h>
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#include <linux/delay.h>
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#include "scsi.h"
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#include <scsi/scsi_host.h>
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#include "t128.h"
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#define AUTOPROBE_IRQ
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#include "NCR5380.h"
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static struct override {
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unsigned long address;
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int irq;
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} overrides
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#ifdef T128_OVERRIDE
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[] __initdata = T128_OVERRIDE;
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#else
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[4] __initdata = {{0, IRQ_AUTO}, {0, IRQ_AUTO},
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{0 ,IRQ_AUTO}, {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 int address;
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int noauto;
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} bases[] __initdata = {
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{ 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0}
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};
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#define NO_BASES ARRAY_SIZE(bases)
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static struct signature {
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const char *string;
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int offset;
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} signatures[] __initdata = {
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{"TSROM: SCSI BIOS, Version 1.12", 0x36},
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};
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#define NO_SIGNATURES ARRAY_SIZE(signatures)
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/*
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* Function : t128_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 t128_setup(char *str, int *ints){
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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("t128_setup : usage t128=address,irq\n");
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else
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if (commandline_current < NO_OVERRIDES) {
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overrides[commandline_current].address = 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].address == 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 t128_detect(struct scsi_host_template * tpnt)
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*
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* Purpose : detects and initializes T128,T128F, or T228 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 t128_detect(struct scsi_host_template * tpnt){
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static int current_override = 0, current_base = 0;
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struct Scsi_Host *instance;
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unsigned long base;
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void __iomem *p;
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int sig, count;
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tpnt->proc_name = "t128";
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tpnt->proc_info = &t128_proc_info;
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for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
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base = 0;
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p = NULL;
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if (overrides[current_override].address) {
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base = overrides[current_override].address;
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p = ioremap(bases[current_base].address, 0x2000);
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if (!p)
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base = 0;
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} else
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for (; !base && (current_base < NO_BASES); ++current_base) {
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#if (TDEBUG & TDEBUG_INIT)
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printk("scsi-t128 : probing address %08x\n", bases[current_base].address);
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#endif
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if (bases[current_base].noauto)
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continue;
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p = ioremap(bases[current_base].address, 0x2000);
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if (!p)
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continue;
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for (sig = 0; sig < NO_SIGNATURES; ++sig)
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if (check_signature(p + signatures[sig].offset,
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signatures[sig].string,
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strlen(signatures[sig].string))) {
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base = bases[current_base].address;
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#if (TDEBUG & TDEBUG_INIT)
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printk("scsi-t128 : detected board.\n");
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#endif
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goto found;
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}
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iounmap(p);
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}
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#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
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printk("scsi-t128 : base = %08x\n", (unsigned int) base);
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#endif
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if (!base)
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break;
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found:
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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->base = base;
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((struct NCR5380_hostdata *)instance->hostdata)->base = p;
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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, T128_IRQS);
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if (instance->irq != SCSI_IRQ_NONE)
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if (request_irq(instance->irq, t128_intr, IRQF_DISABLED, "t128",
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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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}
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#if defined(TDEBUG) && (TDEBUG & TDEBUG_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%08lx", instance->host_no, instance->base);
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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, T128_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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static int t128_release(struct Scsi_Host *shost)
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{
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NCR5380_local_declare();
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NCR5380_setup(shost);
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if (shost->irq)
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free_irq(shost->irq, shost);
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NCR5380_exit(shost);
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if (shost->io_port && shost->n_io_port)
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release_region(shost->io_port, shost->n_io_port);
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scsi_unregister(shost);
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iounmap(base);
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return 0;
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}
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/*
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* Function : int t128_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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*
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*/
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/*
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* XXX Most SCSI boards use this mapping, I could be incorrect. Some one
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* using hard disks on a trantor should verify that this mapping corresponds
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* to that used by the BIOS / ASPI driver by running the linux fdisk program
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* and matching the H_C_S coordinates to what DOS uses.
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*/
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int t128_biosparam(struct scsi_device *sdev, struct block_device *bdev,
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sector_t capacity, int * ip)
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{
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ip[0] = 64;
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ip[1] = 32;
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ip[2] = capacity >> 11;
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return 0;
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}
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/*
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* Function : int NCR5380_pread (struct Scsi_Host *instance,
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* unsigned char *dst, int len)
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*
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* Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
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* dst
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*
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* Inputs : dst = destination, len = length in bytes
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*
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* Returns : 0 on success, non zero on a failure such as a watchdog
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* timeout.
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*/
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static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
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int len) {
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NCR5380_local_declare();
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void __iomem *reg;
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unsigned char *d = dst;
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register int i = len;
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NCR5380_setup(instance);
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reg = base + T_DATA_REG_OFFSET;
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#if 0
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for (; i; --i) {
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while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
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#else
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while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
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for (; i; --i) {
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#endif
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*d++ = readb(reg);
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}
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if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
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unsigned char tmp;
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void __iomem *foo = base + T_CONTROL_REG_OFFSET;
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tmp = readb(foo);
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writeb(tmp | T_CR_CT, foo);
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writeb(tmp, foo);
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printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
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instance->host_no);
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return -1;
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} else
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return 0;
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}
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/*
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* Function : int NCR5380_pwrite (struct Scsi_Host *instance,
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* unsigned char *src, int len)
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*
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* Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
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* src
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*
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* Inputs : src = source, len = length in bytes
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*
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* Returns : 0 on success, non zero on a failure such as a watchdog
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* timeout.
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*/
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static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
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int len) {
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NCR5380_local_declare();
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void __iomem *reg;
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unsigned char *s = src;
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register int i = len;
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NCR5380_setup(instance);
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reg = base + T_DATA_REG_OFFSET;
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#if 0
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for (; i; --i) {
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while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
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#else
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while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
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for (; i; --i) {
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#endif
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writeb(*s++, reg);
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}
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if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
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unsigned char tmp;
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void __iomem *foo = base + T_CONTROL_REG_OFFSET;
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tmp = readb(foo);
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writeb(tmp | T_CR_CT, foo);
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writeb(tmp, foo);
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printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
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instance->host_no);
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return -1;
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} else
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return 0;
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}
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MODULE_LICENSE("GPL");
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#include "NCR5380.c"
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static struct scsi_host_template driver_template = {
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.name = "Trantor T128/T128F/T228",
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.detect = t128_detect,
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.release = t128_release,
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.queuecommand = t128_queue_command,
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.eh_abort_handler = t128_abort,
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.eh_bus_reset_handler = t128_bus_reset,
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.bios_param = t128_biosparam,
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.can_queue = CAN_QUEUE,
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.this_id = 7,
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.sg_tablesize = SG_ALL,
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.cmd_per_lun = CMD_PER_LUN,
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.use_clustering = DISABLE_CLUSTERING,
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};
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#include "scsi_module.c"
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