#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 tuples. 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 #include #include #include "../block/blk.h" #include "scsi.h" #include "hosts.h" #include "t128.h" #define AUTOPROBE_IRQ #include "NCR5380.h" #include "constants.h" #include "sd.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 parameters 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; } } /* * Function : int t128_detect(Scsi_Host_Template * tpnt) * * Purpose : detects and initializes T128,T128F, or T228 controllers * that were autoprobed, overridden on the LILO command line, * or specified at compile time. * * Inputs : tpnt - template for this SCSI adapter. * * Returns : 1 if a host adapter was found, 0 if not. * */ int t128_detect(Scsi_Host_Template * tpnt) { 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 : probing address %08x\n", (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-t128 : detected board.\n"); #endif break; } } #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) printk("scsi-t128 : base = %08x\n", (unsigned int) base); #endif if (!base) break; instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); instance->base = base; NCR5380_init(instance, 0); 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 (request_irq(instance->irq, t128_intr, SA_INTERRUPT, "t128")) { printk("scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq); instance->irq = IRQ_NONE; } if (instance->irq == IRQ_NONE) { printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no); printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no); } #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) printk("scsi%d : irq = %d\n", instance->host_no, 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; } return count; } /* * Function : int t128_biosparam(Disk * disk, int dev, int *ip) * * Purpose : Generates a BIOS / DOS compatible 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 : always 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(Disk * disk, int dev, int * ip) { int size = disk->capacity; 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; #if 0 for (; i; --i) { while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier(); #else while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier(); for (; i; --i) { #endif *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 NCR5380_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; #if 0 for (; i; --i) { while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier(); #else while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier(); for (; i; --i) { #endif *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 NCR5380_pwrite()\n", instance->host_no); return -1; } else return 0; } #include "NCR5380.c"