413 lines
10 KiB
C
413 lines
10 KiB
C
#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
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.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 ARRAY_SIZE(overrides)
|
|
|
|
static struct base {
|
|
unsigned int address;
|
|
int noauto;
|
|
} bases[] __initdata = {
|
|
{ 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0}
|
|
};
|
|
|
|
#define NO_BASES ARRAY_SIZE(bases)
|
|
|
|
static struct signature {
|
|
const char *string;
|
|
int offset;
|
|
} signatures[] __initdata = {
|
|
{"TSROM: SCSI BIOS, Version 1.12", 0x36},
|
|
};
|
|
|
|
#define NO_SIGNATURES ARRAY_SIZE(signatures)
|
|
|
|
#ifndef MODULE
|
|
/*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
static int __init t128_setup(char *str)
|
|
{
|
|
static int commandline_current;
|
|
int i;
|
|
int ints[10];
|
|
|
|
get_options(str, ARRAY_SIZE(ints), ints);
|
|
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;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
__setup("t128=", t128_setup);
|
|
#endif
|
|
|
|
/*
|
|
* Function : int t128_detect(struct 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.
|
|
*
|
|
*/
|
|
|
|
static int __init t128_detect(struct scsi_host_template *tpnt)
|
|
{
|
|
static int current_override, current_base;
|
|
struct Scsi_Host *instance;
|
|
unsigned long base;
|
|
void __iomem *p;
|
|
int sig, count;
|
|
|
|
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) {
|
|
dprintk(NDEBUG_INIT, "t128: probing address 0x%08x\n",
|
|
bases[current_base].address);
|
|
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;
|
|
dprintk(NDEBUG_INIT, "t128: detected board\n");
|
|
goto found;
|
|
}
|
|
iounmap(p);
|
|
}
|
|
|
|
dprintk(NDEBUG_INIT, "t128: base = 0x%08x\n", (unsigned int)base);
|
|
|
|
if (!base)
|
|
break;
|
|
|
|
found:
|
|
instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
|
|
if(instance == NULL)
|
|
goto out_unmap;
|
|
|
|
instance->base = base;
|
|
((struct NCR5380_hostdata *)instance->hostdata)->base = p;
|
|
|
|
if (NCR5380_init(instance, 0))
|
|
goto out_unregister;
|
|
|
|
NCR5380_maybe_reset_bus(instance);
|
|
|
|
if (overrides[current_override].irq != IRQ_AUTO)
|
|
instance->irq = overrides[current_override].irq;
|
|
else
|
|
instance->irq = NCR5380_probe_irq(instance, T128_IRQS);
|
|
|
|
/* Compatibility with documented NCR5380 kernel parameters */
|
|
if (instance->irq == 255)
|
|
instance->irq = NO_IRQ;
|
|
|
|
if (instance->irq != NO_IRQ)
|
|
if (request_irq(instance->irq, t128_intr, 0, "t128",
|
|
instance)) {
|
|
printk("scsi%d : IRQ%d not free, interrupts disabled\n",
|
|
instance->host_no, instance->irq);
|
|
instance->irq = NO_IRQ;
|
|
}
|
|
|
|
if (instance->irq == NO_IRQ) {
|
|
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);
|
|
}
|
|
|
|
dprintk(NDEBUG_INIT, "scsi%d: irq = %d\n",
|
|
instance->host_no, instance->irq);
|
|
|
|
++current_override;
|
|
++count;
|
|
}
|
|
return count;
|
|
|
|
out_unregister:
|
|
scsi_unregister(instance);
|
|
out_unmap:
|
|
iounmap(p);
|
|
return count;
|
|
}
|
|
|
|
static int t128_release(struct Scsi_Host *shost)
|
|
{
|
|
struct NCR5380_hostdata *hostdata = shost_priv(shost);
|
|
|
|
if (shost->irq != NO_IRQ)
|
|
free_irq(shost->irq, shost);
|
|
NCR5380_exit(shost);
|
|
scsi_unregister(shost);
|
|
iounmap(hostdata->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.
|
|
*/
|
|
|
|
static 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)
|
|
{
|
|
struct NCR5380_hostdata *hostdata = shost_priv(instance);
|
|
void __iomem *reg, *base = hostdata->base;
|
|
unsigned char *d = dst;
|
|
register int i = len;
|
|
|
|
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)
|
|
{
|
|
struct NCR5380_hostdata *hostdata = shost_priv(instance);
|
|
void __iomem *reg, *base = hostdata->base;
|
|
unsigned char *s = src;
|
|
register int i = len;
|
|
|
|
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 struct scsi_host_template driver_template = {
|
|
.name = "Trantor T128/T128F/T228",
|
|
.detect = t128_detect,
|
|
.release = t128_release,
|
|
.proc_name = "t128",
|
|
.show_info = t128_show_info,
|
|
.write_info = t128_write_info,
|
|
.info = t128_info,
|
|
.queuecommand = t128_queue_command,
|
|
.eh_abort_handler = t128_abort,
|
|
.eh_bus_reset_handler = t128_bus_reset,
|
|
.bios_param = t128_biosparam,
|
|
.can_queue = 32,
|
|
.this_id = 7,
|
|
.sg_tablesize = SG_ALL,
|
|
.cmd_per_lun = 2,
|
|
.use_clustering = DISABLE_CLUSTERING,
|
|
.cmd_size = NCR5380_CMD_SIZE,
|
|
.max_sectors = 128,
|
|
};
|
|
#include "scsi_module.c"
|