5
#define UNSAFE /* Leave interrupts enabled during pseudo-dma I/O */
6
#define xNDEBUG (NDEBUG_INTR+NDEBUG_RESELECTION+\
7
NDEBUG_SELECTION+NDEBUG_ARBITRATION)
8
#define DMA_WORKS_RIGHT
12
* DTC 3180/3280 driver, by
13
* Ray Van Tassle rayvt@comm.mot.com
16
* Trantor T128/T128F/T228 driver by...
20
* (Unix and Linux consulting and custom programming)
24
* DISTRIBUTION RELEASE 1.
26
* For more information, please consult
29
* SCSI Protocol Controller
35
* AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
36
* for commands that return with a CHECK CONDITION status.
38
* PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance
39
* increase compared to polled I/O.
41
* PARITY - enable parity checking. Not supported.
43
* UNSAFE - leave interrupts enabled during pseudo-DMA transfers.
44
* You probably want this.
46
* The card is detected and initialized in one of several ways :
47
* 1. Autoprobe (default) - since the board is memory mapped,
48
* a BIOS signature is scanned for to locate the registers.
49
* An interrupt is triggered to autoprobe for the interrupt
52
* 2. With command line overrides - dtc=address,irq may be
53
* used on the LILO command line to override the defaults.
57
/*----------------------------------------------------------------*/
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/* the following will set the monitor border color (useful to find
59
where something crashed or gets stuck at */
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#define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);}
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#include <asm/system.h>
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#include <linux/module.h>
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#include <linux/signal.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/stat.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <scsi/scsi_host.h>
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#define DTC_PUBLIC_RELEASE 2
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* The DTC3180 & 3280 boards are memory mapped.
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/* Offset from DTC_5380_OFFSET */
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#define DTC_CONTROL_REG 0x100 /* rw */
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#define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */
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#define CSR_DIR_READ 0x40 /* rw direction, 1 = read 0 = write */
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#define CSR_RESET 0x80 /* wo Resets 53c400 */
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#define CSR_5380_REG 0x80 /* ro 5380 registers can be accessed */
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#define CSR_TRANS_DIR 0x40 /* rw Data transfer direction */
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#define CSR_SCSI_BUFF_INTR 0x20 /* rw Enable int on transfer ready */
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#define CSR_5380_INTR 0x10 /* rw Enable 5380 interrupts */
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#define CSR_SHARED_INTR 0x08 /* rw Interrupt sharing */
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#define CSR_HOST_BUF_NOT_RDY 0x04 /* ro Host buffer not ready */
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#define CSR_SCSI_BUF_RDY 0x02 /* ro SCSI buffer ready */
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#define CSR_GATED_5380_IRQ 0x01 /* ro Last block xferred */
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#define CSR_INT_BASE (CSR_SCSI_BUFF_INTR | CSR_5380_INTR)
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#define DTC_BLK_CNT 0x101 /* rw
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* # of 128-byte blocks to transfer */
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#define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */
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#define DTC_SWITCH_REG 0x3982 /* ro - DIP switches */
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#define DTC_RESUME_XFER 0x3982 /* wo - resume data xfer
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* after disconnect/reconnect*/
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#define DTC_5380_OFFSET 0x3880 /* 8 registers here, see NCR5380.h */
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/*!!!! for dtc, it's a 128 byte buffer at 3900 !!! */
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#define DTC_DATA_BUF 0x3900 /* rw 128 bytes long */
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static struct override {
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unsigned int address;
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[] __initdata = OVERRIDE;
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{ 0, IRQ_AUTO }, { 0, IRQ_AUTO }, { 0, IRQ_AUTO }, { 0, IRQ_AUTO }
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#define NO_OVERRIDES ARRAY_SIZE(overrides)
148
unsigned long address;
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} bases[] __initdata = {
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#define NO_BASES ARRAY_SIZE(bases)
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static const struct signature {
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{"DATA TECHNOLOGY CORPORATION BIOS", 0x25},
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#define NO_SIGNATURES ARRAY_SIZE(signatures)
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* Function : dtc_setup(char *str, int *ints)
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* Purpose : LILO command line initialization of the overrides array,
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* Inputs : str - unused, ints - array of integer parameters with ints[0]
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* equal to the number of ints.
179
static void __init dtc_setup(char *str, int *ints)
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static int commandline_current = 0;
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printk("dtc_setup: usage dtc=address,irq\n");
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else if (commandline_current < NO_OVERRIDES) {
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overrides[commandline_current].address = ints[1];
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overrides[commandline_current].irq = ints[2];
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for (i = 0; i < NO_BASES; ++i)
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if (bases[i].address == ints[1]) {
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++commandline_current;
199
* Function : int dtc_detect(struct scsi_host_template * tpnt)
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* Purpose : detects and initializes DTC 3180/3280 controllers
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* that were autoprobed, overridden on the LILO command line,
203
* or specified at compile time.
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* Inputs : tpnt - template for this SCSI adapter.
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* Returns : 1 if a host adapter was found, 0 if not.
211
static int __init dtc_detect(struct scsi_host_template * tpnt)
213
static int current_override = 0, current_base = 0;
214
struct Scsi_Host *instance;
219
tpnt->proc_name = "dtc3x80";
220
tpnt->proc_info = &dtc_proc_info;
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for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
226
if (overrides[current_override].address) {
227
addr = overrides[current_override].address;
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base = ioremap(addr, 0x2000);
232
for (; !addr && (current_base < NO_BASES); ++current_base) {
233
#if (DTCDEBUG & DTCDEBUG_INIT)
234
printk(KERN_DEBUG "scsi-dtc : probing address %08x\n", bases[current_base].address);
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if (bases[current_base].noauto)
238
base = ioremap(bases[current_base].address, 0x2000);
241
for (sig = 0; sig < NO_SIGNATURES; ++sig) {
242
if (check_signature(base + signatures[sig].offset, signatures[sig].string, strlen(signatures[sig].string))) {
243
addr = bases[current_base].address;
244
#if (DTCDEBUG & DTCDEBUG_INIT)
245
printk(KERN_DEBUG "scsi-dtc : detected board.\n");
253
#if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT)
254
printk(KERN_DEBUG "scsi-dtc : base = %08x\n", addr);
261
instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
262
if (instance == NULL)
265
instance->base = addr;
266
((struct NCR5380_hostdata *)(instance)->hostdata)->base = base;
268
NCR5380_init(instance, 0);
270
NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); /* Enable int's */
271
if (overrides[current_override].irq != IRQ_AUTO)
272
instance->irq = overrides[current_override].irq;
274
instance->irq = NCR5380_probe_irq(instance, DTC_IRQS);
276
#ifndef DONT_USE_INTR
277
/* With interrupts enabled, it will sometimes hang when doing heavy
278
* reads. So better not enable them until I finger it out. */
279
if (instance->irq != SCSI_IRQ_NONE)
280
if (request_irq(instance->irq, dtc_intr, IRQF_DISABLED,
282
printk(KERN_ERR "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
283
instance->irq = SCSI_IRQ_NONE;
286
if (instance->irq == SCSI_IRQ_NONE) {
287
printk(KERN_WARNING "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
288
printk(KERN_WARNING "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
291
if (instance->irq != SCSI_IRQ_NONE)
292
printk(KERN_WARNING "scsi%d : interrupts not used. Might as well not jumper it.\n", instance->host_no);
293
instance->irq = SCSI_IRQ_NONE;
295
#if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT)
296
printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
299
printk(KERN_INFO "scsi%d : at 0x%05X", instance->host_no, (int) instance->base);
300
if (instance->irq == SCSI_IRQ_NONE)
301
printk(" interrupts disabled");
303
printk(" irq %d", instance->irq);
304
printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", CAN_QUEUE, CMD_PER_LUN, DTC_PUBLIC_RELEASE);
305
NCR5380_print_options(instance);
315
* Function : int dtc_biosparam(Disk * disk, struct block_device *dev, int *ip)
317
* Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
318
* the specified device / size.
320
* Inputs : size = size of device in sectors (512 bytes), dev = block device
321
* major / minor, ip[] = {heads, sectors, cylinders}
323
* Returns : always 0 (success), initializes ip
328
* XXX Most SCSI boards use this mapping, I could be incorrect. Some one
329
* using hard disks on a trantor should verify that this mapping corresponds
330
* to that used by the BIOS / ASPI driver by running the linux fdisk program
331
* and matching the H_C_S coordinates to what DOS uses.
334
static int dtc_biosparam(struct scsi_device *sdev, struct block_device *dev,
335
sector_t capacity, int *ip)
346
/****************************************************************
347
* Function : int NCR5380_pread (struct Scsi_Host *instance,
348
* unsigned char *dst, int len)
350
* Purpose : Fast 5380 pseudo-dma read function, reads len bytes to
353
* Inputs : dst = destination, len = length in bytes
355
* Returns : 0 on success, non zero on a failure such as a watchdog
359
static int dtc_maxi = 0;
360
static int dtc_wmaxi = 0;
362
static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
364
unsigned char *d = dst;
365
int i; /* For counting time spent in the poll-loop */
366
NCR5380_local_declare();
367
NCR5380_setup(instance);
370
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
371
NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE);
372
if (instance->irq == SCSI_IRQ_NONE)
373
NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ);
375
NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ | CSR_INT_BASE);
376
NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */
380
while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY)
383
memcpy_fromio(d, base + DTC_DATA_BUF, 128);
387
/*** with int's on, it sometimes hangs after here.
388
* Looks like something makes HBNR go away. */
391
while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS))
393
NCR5380_write(MODE_REG, 0); /* Clear the operating mode */
395
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
401
/****************************************************************
402
* Function : int NCR5380_pwrite (struct Scsi_Host *instance,
403
* unsigned char *src, int len)
405
* Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
408
* Inputs : src = source, len = length in bytes
410
* Returns : 0 on success, non zero on a failure such as a watchdog
414
static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
417
NCR5380_local_declare();
418
NCR5380_setup(instance);
420
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
421
NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE);
422
/* set direction (write) */
423
if (instance->irq == SCSI_IRQ_NONE)
424
NCR5380_write(DTC_CONTROL_REG, 0);
426
NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR);
427
NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */
428
for (i = 0; len > 0; ++i) {
430
/* Poll until the host buffer can accept data. */
431
while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY)
434
memcpy_toio(base + DTC_DATA_BUF, src, 128);
439
while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS))
442
/* Wait until the last byte has been sent to the disk */
443
while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
446
/* Check for parity error here. fixme. */
447
NCR5380_write(MODE_REG, 0); /* Clear the operating mode */
454
MODULE_LICENSE("GPL");
458
static int dtc_release(struct Scsi_Host *shost)
460
NCR5380_local_declare();
461
NCR5380_setup(shost);
463
free_irq(shost->irq, shost);
465
if (shost->io_port && shost->n_io_port)
466
release_region(shost->io_port, shost->n_io_port);
467
scsi_unregister(shost);
472
static struct scsi_host_template driver_template = {
473
.name = "DTC 3180/3280 ",
474
.detect = dtc_detect,
475
.release = dtc_release,
476
.queuecommand = dtc_queue_command,
477
.eh_abort_handler = dtc_abort,
478
.eh_bus_reset_handler = dtc_bus_reset,
479
.bios_param = dtc_biosparam,
480
.can_queue = CAN_QUEUE,
482
.sg_tablesize = SG_ALL,
483
.cmd_per_lun = CMD_PER_LUN,
484
.use_clustering = DISABLE_CLUSTERING,
486
#include "scsi_module.c"