#define AUTOSENSE#define PSEUDO_DMA/* * Trantor T128/T128F/T228 driver *	Note : architecturally, the T100 and T130 are different and won't  * 	work * * Copyright 1993, Drew Eckhardt *	Visionary Computing *	(Unix and Linux consulting and custom programming) *	drew@colorado.edu *      +1 (303) 440-4894 * * DISTRIBUTION RELEASE 3. * * For more information, please consult  * * Trantor Systems, Ltd. * T128/T128F/T228 SCSI Host Adapter * Hardware Specifications *  * Trantor Systems, Ltd.  * 5415 Randall Place * Fremont, CA 94538 * 1+ (415) 770-1400, FAX 1+ (415) 770-9910 *  * 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 *//* * Options :  * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically *      for commands that return with a CHECK CONDITION status.  * * PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance * increase compared to polled I/O. * * PARITY - enable parity checking.  Not supported. *  * SCSI2 - enable support for SCSI-II tagged queueing.  Untested. * * * UNSAFE - leave interrupts enabled during pseudo-DMA transfers.  You *          only really want to use this if you're having a problem with *          dropped characters during high speed communications, and even *          then, you're going to be better off twiddling with transfersize. * * USLEEP - enable support for devices that don't disconnect.  Untested. * * The card is detected and initialized in one of several ways :  * 1.  Autoprobe (default) - since the board is memory mapped,  *     a BIOS signature is scanned for to locate the registers. *     An interrupt is triggered to autoprobe for the interrupt *     line. * * 2.  With command line overrides - t128=address,irq may be  *     used on the LILO command line to override the defaults. * * 3.  With the T128_OVERRIDE compile time define.  This is  *     specified as an array of address, irq tupples.  Ie, for *     one board at the default 0xcc000 address, IRQ5, I could say  *     -DT128_OVERRIDE={{0xcc000, 5}} *	 *     Note that if the override methods are used, place holders must *     be specified for other boards in the system. *  * T128/T128F jumper/dipswitch settings (note : on my sample, the switches  * were epoxy'd shut, meaning I couldn't change the 0xcc000 base address) : * * T128    Sw7 Sw8 Sw6 = 0ws Sw5 = boot  * T128F   Sw6 Sw7 Sw5 = 0ws Sw4 = boot Sw8 = floppy disable * cc000   off off       * c8000   off on * dc000   on  off * d8000   on  on * *  * Interrupts  * There is a 12 pin jumper block, jp1, numbered as follows :  *   T128 (JP1)  	 T128F (J5) * 2 4 6 8 10 12	11 9  7 5 3 1 * 1 3 5 7 9  11	12 10 8 6 4 2 * * 3   2-4 * 5   1-3 * 7   3-5 * T128F only  * 10 8-10 * 12 7-9 * 14 10-12 * 15 9-11 */ /* * $Log: t128.c,v $ */#include <asm/system.h>#include <linux/signal.h>#include <linux/sched.h>#include "../block/blk.h"#include "scsi.h"#include "hosts.h"#include "t128.h"#define AUTOPROBE_IRQ#include "NCR5380.h"#include "constants.h"static struct override {    unsigned char *address;    int irq;} overrides #ifdef T128_OVERRIDE    [] = T128_OVERRIDE;#else    [4] = {{NULL,IRQ_AUTO}, {NULL,IRQ_AUTO}, {NULL,IRQ_AUTO},	{NULL,IRQ_AUTO}};#endif#define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))static struct base {    unsigned char *address;    int noauto;} bases[] = {{(unsigned char *) 0xcc000, 0}, {(unsigned char *) 0xc8000, 0},    {(unsigned char *) 0xdc000, 0}, {(unsigned char *) 0xd8000, 0}};#define NO_BASES (sizeof (bases) / sizeof (struct base))static const struct signature {    const char *string;    int offset;} signatures[] = {{"TSROM: SCSI BIOS, Version 1.12", 0x36},};#define NO_SIGNATURES (sizeof (signatures) /  sizeof (struct signature))/* * Function : t128_setup(char *str, int *ints) * * Purpose : LILO command line initialization of the overrides array, *  * Inputs : str - unused, ints - array of integer paramters with ints[0] *	equal to the number of ints. * */void t128_setup(char *str, int *ints) {    static int commandline_current = 0;    int i;    if (ints[0] != 2) 	printk("t128_setup : usage t128=address,irq\n");    else 	if (commandline_current < NO_OVERRIDES) {	    overrides[commandline_current].address = (unsigned char *) ints[1];	    overrides[commandline_current].irq = ints[2];	    for (i = 0; i < NO_BASES; ++i)		if (bases[i].address == (unsigned char *) ints[1]) {		    bases[i].noauto = 1;		    break;		}	    ++commandline_current;	}}static struct sigaction t128_sigaction =  { t128_intr, 0, SA_INTERRUPT , NULL };/*  * Function : int t128_detect(int hostno) * * Purpose : detects and initializes T128,T128F, or T228 controllers *	that were autoprobed, overriden on the LILO command line,  *	or specified at compile time. * * Inputs : hostno - id of this SCSI adapter. *  * Returns : 1 if a host adapter was found, 0 if not. * */int t128_detect(int hostno) {    static int current_override = 0, current_base = 0;    struct Scsi_Host *instance;    unsigned char *base;    int sig, count;    for (count = 0; current_override < NO_OVERRIDES; ++current_override) {	base = NULL;	if (overrides[current_override].address)	    base = overrides[current_override].address;	else 	    for (; !base && (current_base < NO_BASES); ++current_base) {#if (TDEBUG & TDEBUG_INIT)    printk("scsi%d : probing address %08x\n", hostno, (unsigned int) bases[current_base].address);#endif		for (sig = 0; sig < NO_SIGNATURES; ++sig) 		    if (!bases[current_base].noauto && !memcmp 			(bases[current_base].address + signatures[sig].offset, 			signatures[sig].string, strlen(signatures[sig].string))) {			base = bases[current_base].address;#if (TDEBUG & TDEBUG_INIT)			printk("scsi%d : detected board.\n", hostno);#endif			break;		    }	    }#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)	printk("scsi%d : base = %08x\n", hostno, (unsigned int) base);#endif	if (!base)	    break;	instance = scsi_register (hostno, sizeof(struct NCR5380_hostdata));	instance->base = base;	NCR5380_init(instance);	if (overrides[current_override].irq != IRQ_AUTO)	    instance->irq = overrides[current_override].irq;	else 	    instance->irq = NCR5380_probe_irq(instance, T128_IRQS);	if (instance->irq != IRQ_NONE) 	    if (irqaction (instance->irq, &t128_sigaction)) {		printk("scsi%d : IRQ%d not free, interrupts disabled\n", 		    hostno, instance->irq);		instance->irq = IRQ_NONE;	    } 	if (instance->irq == IRQ_NONE) {	    printk("scsi%d : interrupts not enabled. for better interactive performance,\n", hostno);	    printk("scsi%d : please jumper the board for a free IRQ.\n", hostno);	}#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)	printk("scsi%d : irq = %d\n", hostno, instance->irq);#endif	printk("scsi%d : at 0x%08x", instance->host_no, (int) 	    instance->base);	if (instance->irq == IRQ_NONE)	    printk (" interrupts disabled");	else 	    printk (" irq %d", instance->irq);	printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d",	    CAN_QUEUE, CMD_PER_LUN, T128_PUBLIC_RELEASE);	NCR5380_print_options(instance);	printk("\n");	++current_override;	++count;	++hostno;    }    return count;}/* * Function : int t128_biosparam(int size, int dev, int *ip) * * Purpose : Generates a BIOS / DOS compatable H-C-S mapping for  *	the specified device / size. *  * Inputs : size = size of device in sectors (512 bytes), dev = block device *	major / minor, ip[] = {heads, sectors, cylinders}   * * Returns : allways 0 (success), initializes ip *	 *//*  * 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 t128_biosparam(int size, int dev, int * ip){  ip[0] = 64;  ip[1] = 32;  ip[2] = size >> 11;  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 *reg = (unsigned char *) (instance->base + 	T_DATA_REG_OFFSET), *d = dst;    register i = len;    while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY);    for (; i; --i) 	*d++ = *reg;    if (*(instance->base + T_STATUS_REG_OFFSET) & T_ST_TIM) {	unsigned char tmp;	volatile unsigned char *foo;	foo = instance->base + T_CONTROL_REG_OFFSET;	tmp = *foo;	*foo = tmp | T_CR_CT;	*foo = tmp;	printk("scsi%d : watchdog timer fired in NCR5480_pread()\n",	    instance->host_no);	return -1;    } else	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 *reg = (unsigned char *) (instance->base + 	T_DATA_REG_OFFSET), *s = src;    register i = len;    while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY);    for (; i; --i)	*reg = *s++;    if (*(instance->base + T_STATUS_REG_OFFSET) & T_ST_TIM) {	unsigned char tmp;	volatile unsigned char *foo;	foo = instance->base + T_CONTROL_REG_OFFSET;	tmp = *foo;	*foo = tmp | T_CR_CT;	*foo = tmp;	printk("scsi%d : watchdog timer fired in NCR5480_pwrite()\n",	    instance->host_no);	return -1;    } else 	return 0;}/* * Function : const char *t128_info(void) * * Purpose : provide furthur information about this driver. * * Returns : an empty string. */const char *t128_info (void) {    static const char string[]="";    return string;}#include "NCR5380.c"