#define AUTOSENSE
#define PSEUDO_DMA
#define DONT_USE_INTR
#define UNSAFE /* Leave interrupts enabled during pseudo-dma I/O */
#define xNDEBUG (NDEBUG_INTR+NDEBUG_RESELECTION+\
NDEBUG_SELECTION+NDEBUG_ARBITRATION)
#define DMA_WORKS_RIGHT
/*
* DTC 3180/3280 driver, by
* Ray Van Tassle rayvt@comm.mot.com
*
* taken from ...
* Trantor T128/T128F/T228 driver by...
*
* Drew Eckhardt
* Visionary Computing
* (Unix and Linux consulting and custom programming)
* drew@colorado.edu
* +1 (303) 440-4894
*
* DISTRIBUTION RELEASE 1.
*
* For more information, please consult
*
* NCR 5380 Family
* SCSI Protocol Controller
* Databook
*/
/*
* 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.
*
* UNSAFE - leave interrupts enabled during pseudo-DMA transfers.
* You probably want this.
*
* 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 - dtc=address,irq may be
* used on the LILO command line to override the defaults.
*
*/
/*----------------------------------------------------------------*/
/* the following will set the monitor border color (useful to find
where something crashed or gets stuck at */
/* 1 = blue
2 = green
3 = cyan
4 = red
5 = magenta
6 = yellow
7 = white
*/
#if 0
#define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);}
#else
#define rtrc(i) {}
#endif
#include <asm/system.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/blk.h>
#include <asm/io.h>
#include "scsi.h"
#include "hosts.h"
#include "dtc.h"
#define AUTOPROBE_IRQ
#include "NCR5380.h"
#include "constants.h"
#include "sd.h"
#include<linux/stat.h>
#include<linux/string.h>
struct proc_dir_entry proc_scsi_dtc = {
PROC_SCSI_T128, 7, "dtc3x80",
S_IFDIR | S_IRUGO | S_IXUGO, 2
};
static struct override {
unsigned char *address;
int irq;
} overrides
#ifdef OVERRIDE
[] = 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[] = { {"DATA TECHNOLOGY CORPORATION BIOS", 0x25}, };
#define NO_SIGNATURES (sizeof (signatures) / sizeof (struct signature))
/*
* Function : dtc_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 dtc_setup(char *str, int *ints) {
static int commandline_current = 0;
int i;
if (ints[0] != 2)
printk("dtc_setup: usage dtc=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 dtc_detect(Scsi_Host_Template * tpnt)
*
* Purpose : detects and initializes DTC 3180/3280 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 dtc_detect(Scsi_Host_Template * tpnt) {
static int current_override = 0, current_base = 0;
struct Scsi_Host *instance;
unsigned char *base;
int sig, count;
tpnt->proc_dir = &proc_scsi_dtc;
tpnt->proc_info = &dtc_proc_info;
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 (DTCDEBUG & DTCDEBUG_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 (DTCDEBUG & DTCDEBUG_INIT)
printk("scsi-dtc : detected board.\n");
#endif
break;
}
}
#if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT)
printk("scsi-dtc : 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);
NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); /* Enable int's */
if (overrides[current_override].irq != IRQ_AUTO)
instance->irq = overrides[current_override].irq;
else
instance->irq = NCR5380_probe_irq(instance, DTC_IRQS);
#ifndef DONT_USE_INTR
/* With interrupts enabled, it will sometimes hang when doing heavy
* reads. So better not enable them until I finger it out. */
if (instance->irq != IRQ_NONE)
if (request_irq(instance->irq, dtc_intr, SA_INTERRUPT, "dtc")) {
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);
}
#else
if (instance->irq != IRQ_NONE)
printk("scsi%d : interrupts not used. Might as well not jumper it.\n",
instance->host_no);
instance->irq = IRQ_NONE;
#endif
#if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT)
printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
#endif
printk("scsi%d : at 0x%05X", 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, DTC_PUBLIC_RELEASE);
NCR5380_print_options(instance);
printk("\n");
++current_override;
++count;
}
return count;
}
/*
* Function : int dtc_biosparam(Disk * disk, kdev_t 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 dtc_biosparam(Disk * disk, kdev_t 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, reads 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 int dtc_maxi = 0;
static int dtc_wmaxi = 0;
static inline int NCR5380_pread (struct Scsi_Host *instance,
unsigned char *dst, int len)
{
unsigned char *d = dst;
int i; /* For counting time spent in the poll-loop */
NCR5380_local_declare();
NCR5380_setup(instance);
i = 0;
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE);
if (instance->irq == IRQ_NONE)
NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ);
else
NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ | CSR_INT_BASE);
NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */
rtrc(1);
while (len > 0) {
rtrc(2);
while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY)
++i;
rtrc(3);
memcpy(d, (char *)(base + DTC_DATA_BUF), 128);
d += 128;
len -= 128;
rtrc(7); /*** with int's on, it sometimes hangs after here.
* Looks like something makes HBNR go away. */
}
rtrc(4);
while ( !(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS))
++i;
NCR5380_write(MODE_REG, 0); /* Clear the operating mode */
rtrc(0);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
if (i > dtc_maxi)
dtc_maxi = i;
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) {
int i;
NCR5380_local_declare();
NCR5380_setup(instance);
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE);
/* set direction (write) */
if (instance->irq == IRQ_NONE)
NCR5380_write(DTC_CONTROL_REG, 0);
else
NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR);
NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */
for (i = 0; len > 0; ++i) {
rtrc(5);
/* Poll until the host buffer can accept data. */
while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY)
++i;
rtrc(3);
memcpy((char *)(base + DTC_DATA_BUF), src, 128);
src += 128;
len -= 128;
}
rtrc(4);
while ( !(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS))
++i;
rtrc(6);
/* Wait until the last byte has been sent to the disk */
while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
++i;
rtrc(7);
/* Check for parity error here. fixme. */
NCR5380_write(MODE_REG, 0); /* Clear the operating mode */
rtrc(0);
if (i > dtc_wmaxi)
dtc_wmaxi = i;
return (0);
}
#include "NCR5380.c"
#ifdef MODULE
/* Eventually this will go into an include file, but this will be later */
Scsi_Host_Template driver_template = DTC3x80;
#include "scsi_module.c"
#endif
