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-rw-r--r--drivers/scsi/t128.c449
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diff --git a/drivers/scsi/t128.c b/drivers/scsi/t128.c
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+#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 <asm/system.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <asm/io.h>
+#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+#include "t128.h"
+#define AUTOPROBE_IRQ
+#include "NCR5380.h"
+
+static struct override {
+ unsigned long address;
+ int irq;
+} overrides
+#ifdef T128_OVERRIDE
+ [] __initdata = T128_OVERRIDE;
+#else
+ [4] __initdata = {{0, IRQ_AUTO}, {0, IRQ_AUTO},
+ {0 ,IRQ_AUTO}, {0, IRQ_AUTO}};
+#endif
+
+#define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
+
+static struct base {
+ unsigned int address;
+ int noauto;
+} bases[] __initdata = {
+ { 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0}
+};
+
+#define NO_BASES (sizeof (bases) / sizeof (struct base))
+
+static struct signature {
+ const char *string;
+ int offset;
+} signatures[] __initdata = {
+{"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 __init 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 = ints[1];
+ overrides[commandline_current].irq = ints[2];
+ for (i = 0; i < NO_BASES; ++i)
+ if (bases[i].address == 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 __init t128_detect(Scsi_Host_Template * tpnt){
+ static int current_override = 0, current_base = 0;
+ struct Scsi_Host *instance;
+ unsigned long base;
+ void __iomem *p;
+ int sig, count;
+
+ tpnt->proc_name = "t128";
+ tpnt->proc_info = &t128_proc_info;
+
+ for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
+ base = 0;
+ p = NULL;
+
+ if (overrides[current_override].address) {
+ base = overrides[current_override].address;
+ p = ioremap(bases[current_base].address, 0x2000);
+ if (!p)
+ base = 0;
+ } else
+ for (; !base && (current_base < NO_BASES); ++current_base) {
+#if (TDEBUG & TDEBUG_INIT)
+ printk("scsi-t128 : probing address %08x\n", bases[current_base].address);
+#endif
+ if (bases[current_base].noauto)
+ continue;
+ p = ioremap(bases[current_base].address, 0x2000);
+ if (!p)
+ continue;
+ for (sig = 0; sig < NO_SIGNATURES; ++sig)
+ if (check_signature(p + 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
+ goto found;
+ }
+ iounmap(p);
+ }
+
+#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
+ printk("scsi-t128 : base = %08x\n", (unsigned int) base);
+#endif
+
+ if (!base)
+ break;
+
+found:
+ instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
+ if(instance == NULL)
+ break;
+
+ instance->base = base;
+ ((struct NCR5380_hostdata *)instance->hostdata)->base = p;
+
+ 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 != SCSI_IRQ_NONE)
+ if (request_irq(instance->irq, t128_intr, SA_INTERRUPT, "t128", instance)) {
+ printk("scsi%d : IRQ%d not free, interrupts disabled\n",
+ instance->host_no, instance->irq);
+ instance->irq = SCSI_IRQ_NONE;
+ }
+
+ if (instance->irq == SCSI_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%08lx", instance->host_no, instance->base);
+ if (instance->irq == SCSI_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;
+}
+
+static int t128_release(struct Scsi_Host *shost)
+{
+ NCR5380_local_declare();
+ NCR5380_setup(shost);
+ if (shost->irq)
+ free_irq(shost->irq, NULL);
+ NCR5380_exit(shost);
+ if (shost->io_port && shost->n_io_port)
+ release_region(shost->io_port, shost->n_io_port);
+ scsi_unregister(shost);
+ iounmap(base);
+ return 0;
+}
+
+/*
+ * Function : int t128_biosparam(Disk * disk, struct block_device *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(struct scsi_device *sdev, struct block_device *bdev,
+ sector_t capacity, int * ip)
+{
+ ip[0] = 64;
+ ip[1] = 32;
+ ip[2] = capacity >> 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) {
+ NCR5380_local_declare();
+ void __iomem *reg;
+ unsigned char *d = dst;
+ register int i = len;
+
+ NCR5380_setup(instance);
+ reg = base + T_DATA_REG_OFFSET;
+
+#if 0
+ for (; i; --i) {
+ while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
+#else
+ while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
+ for (; i; --i) {
+#endif
+ *d++ = readb(reg);
+ }
+
+ if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
+ unsigned char tmp;
+ void __iomem *foo = base + T_CONTROL_REG_OFFSET;
+ tmp = readb(foo);
+ writeb(tmp | T_CR_CT, foo);
+ writeb(tmp, foo);
+ 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) {
+ NCR5380_local_declare();
+ void __iomem *reg;
+ unsigned char *s = src;
+ register int i = len;
+
+ NCR5380_setup(instance);
+ reg = base + T_DATA_REG_OFFSET;
+
+#if 0
+ for (; i; --i) {
+ while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
+#else
+ while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
+ for (; i; --i) {
+#endif
+ writeb(*s++, reg);
+ }
+
+ if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
+ unsigned char tmp;
+ void __iomem *foo = base + T_CONTROL_REG_OFFSET;
+ tmp = readb(foo);
+ writeb(tmp | T_CR_CT, foo);
+ writeb(tmp, foo);
+ printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
+ instance->host_no);
+ return -1;
+ } else
+ return 0;
+}
+
+MODULE_LICENSE("GPL");
+
+#include "NCR5380.c"
+
+static Scsi_Host_Template driver_template = {
+ .name = "Trantor T128/T128F/T228",
+ .detect = t128_detect,
+ .release = t128_release,
+ .queuecommand = t128_queue_command,
+ .eh_abort_handler = t128_abort,
+ .eh_bus_reset_handler = t128_bus_reset,
+ .eh_host_reset_handler = t128_host_reset,
+ .eh_device_reset_handler = t128_device_reset,
+ .bios_param = t128_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"
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