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Diffstat (limited to 'linux/src/drivers/scsi/aha1542.c')
-rw-r--r--linux/src/drivers/scsi/aha1542.c1325
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diff --git a/linux/src/drivers/scsi/aha1542.c b/linux/src/drivers/scsi/aha1542.c
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+++ b/linux/src/drivers/scsi/aha1542.c
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+/* $Id: aha1542.c,v 1.1 1999/04/26 05:54:11 tb Exp $
+ * linux/kernel/aha1542.c
+ *
+ * Copyright (C) 1992 Tommy Thorn
+ * Copyright (C) 1993, 1994, 1995 Eric Youngdale
+ *
+ * Modified by Eric Youngdale
+ * Use request_irq and request_dma to help prevent unexpected conflicts
+ * Set up on-board DMA controller, such that we do not have to
+ * have the bios enabled to use the aha1542.
+ * Modified by David Gentzel
+ * Don't call request_dma if dma mask is 0 (for BusLogic BT-445S VL-Bus
+ * controller).
+ * Modified by Matti Aarnio
+ * Accept parameters from LILO cmd-line. -- 1-Oct-94
+ * Modified by Mike McLagan <mike.mclagan@linux.org>
+ * Recognise extended mode on AHA1542CP, different bit than 1542CF
+ * 1-Jan-97
+ * Modified by Bjorn L. Thordarson and Einar Thor Einarsson
+ * Recognize that DMA0 is valid DMA channel -- 13-Jul-98
+ */
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/head.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/proc_fs.h>
+#include <asm/dma.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <linux/blk.h>
+#include "scsi.h"
+#include "hosts.h"
+
+
+#include "aha1542.h"
+
+#include<linux/stat.h>
+
+struct proc_dir_entry proc_scsi_aha1542 = {
+ PROC_SCSI_AHA1542, 7, "aha1542",
+ S_IFDIR | S_IRUGO | S_IXUGO, 2
+};
+
+#ifdef DEBUG
+#define DEB(x) x
+#else
+#define DEB(x)
+#endif
+/*
+static const char RCSid[] = "$Header: cvs/gnumach/linux/src/drivers/scsi/Attic/aha1542.c,v 1.1 1999/04/26 05:54:11 tb Exp $";
+*/
+
+/* The adaptec can be configured for quite a number of addresses, but
+I generally do not want the card poking around at random. We allow
+two addresses - this allows people to use the Adaptec with a Midi
+card, which also used 0x330 -- can be overridden with LILO! */
+
+#define MAXBOARDS 2 /* Increase this and the sizes of the
+ arrays below, if you need more.. */
+
+static unsigned int bases[MAXBOARDS]={0x330, 0x334};
+
+/* set by aha1542_setup according to the command line */
+static int setup_called[MAXBOARDS] = {0,0};
+static int setup_buson[MAXBOARDS] = {0,0};
+static int setup_busoff[MAXBOARDS] = {0,0};
+static int setup_dmaspeed[MAXBOARDS] = {-1,-1};
+
+static char *setup_str[MAXBOARDS] = {(char *)NULL,(char *)NULL};
+
+/*
+ * LILO params: aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]]
+ *
+ * Where: <PORTBASE> is any of the valid AHA addresses:
+ * 0x130, 0x134, 0x230, 0x234, 0x330, 0x334
+ * <BUSON> is the time (in microsecs) that AHA spends on the AT-bus
+ * when transferring data. 1542A power-on default is 11us,
+ * valid values are in range: 2..15 (decimal)
+ * <BUSOFF> is the time that AHA spends OFF THE BUS after while
+ * it is transferring data (not to monopolize the bus).
+ * Power-on default is 4us, valid range: 1..64 microseconds.
+ * <DMASPEED> Default is jumper selected (1542A: on the J1),
+ * but experimenter can alter it with this.
+ * Valid values: 5, 6, 7, 8, 10 (MB/s)
+ * Factory default is 5 MB/s.
+ */
+
+#define BIOS_TRANSLATION_1632 0 /* Used by some old 1542A boards */
+#define BIOS_TRANSLATION_6432 1 /* Default case these days */
+#define BIOS_TRANSLATION_25563 2 /* Big disk case */
+
+struct aha1542_hostdata{
+ /* This will effectively start both of them at the first mailbox */
+ int bios_translation; /* Mapping bios uses - for compatibility */
+ int aha1542_last_mbi_used;
+ int aha1542_last_mbo_used;
+ Scsi_Cmnd * SCint[AHA1542_MAILBOXES];
+ struct mailbox mb[2*AHA1542_MAILBOXES];
+ struct ccb ccb[AHA1542_MAILBOXES];
+};
+
+#define HOSTDATA(host) ((struct aha1542_hostdata *) &host->hostdata)
+
+static struct Scsi_Host * aha_host[7] = {NULL,}; /* One for each IRQ level (9-15) */
+
+
+
+
+#define WAITnexttimeout 3000000
+
+static void setup_mailboxes(int base_io, struct Scsi_Host * shpnt);
+static int aha1542_restart(struct Scsi_Host * shost);
+
+#define aha1542_intr_reset(base) outb(IRST, CONTROL(base))
+
+#define WAIT(port, mask, allof, noneof) \
+ { register WAITbits; \
+ register WAITtimeout = WAITnexttimeout; \
+ while (1) { \
+ WAITbits = inb(port) & (mask); \
+ if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0)) \
+ break; \
+ if (--WAITtimeout == 0) goto fail; \
+ } \
+ }
+
+/* Similar to WAIT, except we use the udelay call to regulate the
+ amount of time we wait. */
+#define WAITd(port, mask, allof, noneof, timeout) \
+ { register WAITbits; \
+ register WAITtimeout = timeout; \
+ while (1) { \
+ WAITbits = inb(port) & (mask); \
+ if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0)) \
+ break; \
+ udelay(1000); \
+ if (--WAITtimeout == 0) goto fail; \
+ } \
+ }
+
+static void aha1542_stat(void)
+{
+/* int s = inb(STATUS), i = inb(INTRFLAGS);
+ printk("status=%x intrflags=%x\n", s, i, WAITnexttimeout-WAITtimeout); */
+}
+
+/* This is a bit complicated, but we need to make sure that an interrupt
+ routine does not send something out while we are in the middle of this.
+ Fortunately, it is only at boot time that multi-byte messages
+ are ever sent. */
+static int aha1542_out(unsigned int base, unchar *cmdp, int len)
+{
+ unsigned long flags = 0;
+
+ save_flags(flags);
+ if(len == 1) {
+ while(1==1){
+ WAIT(STATUS(base), CDF, 0, CDF);
+ cli();
+ if(inb(STATUS(base)) & CDF) {restore_flags(flags); continue;}
+ outb(*cmdp, DATA(base));
+ restore_flags(flags);
+ return 0;
+ }
+ } else {
+ cli();
+ while (len--)
+ {
+ WAIT(STATUS(base), CDF, 0, CDF);
+ outb(*cmdp++, DATA(base));
+ }
+ restore_flags(flags);
+ }
+ return 0;
+ fail:
+ restore_flags(flags);
+ printk("aha1542_out failed(%d): ", len+1); aha1542_stat();
+ return 1;
+}
+
+/* Only used at boot time, so we do not need to worry about latency as much
+ here */
+static int aha1542_in(unsigned int base, unchar *cmdp, int len)
+{
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+ while (len--)
+ {
+ WAIT(STATUS(base), DF, DF, 0);
+ *cmdp++ = inb(DATA(base));
+ }
+ restore_flags(flags);
+ return 0;
+ fail:
+ restore_flags(flags);
+ printk("aha1542_in failed(%d): ", len+1); aha1542_stat();
+ return 1;
+}
+
+/* Similar to aha1542_in, except that we wait a very short period of time.
+ We use this if we know the board is alive and awake, but we are not sure
+ if the board will respond to the command we are about to send or not */
+static int aha1542_in1(unsigned int base, unchar *cmdp, int len)
+{
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+ while (len--)
+ {
+ WAITd(STATUS(base), DF, DF, 0, 100);
+ *cmdp++ = inb(DATA(base));
+ }
+ restore_flags(flags);
+ return 0;
+ fail:
+ restore_flags(flags);
+ return 1;
+}
+
+static int makecode(unsigned hosterr, unsigned scsierr)
+{
+ switch (hosterr) {
+ case 0x0:
+ case 0xa: /* Linked command complete without error and linked normally */
+ case 0xb: /* Linked command complete without error, interrupt generated */
+ hosterr = 0;
+ break;
+
+ case 0x11: /* Selection time out-The initiator selection or target
+ reselection was not complete within the SCSI Time out period */
+ hosterr = DID_TIME_OUT;
+ break;
+
+ case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
+ than was allocated by the Data Length field or the sum of the
+ Scatter / Gather Data Length fields. */
+
+ case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
+
+ case 0x15: /* MBO command was not 00, 01 or 02-The first byte of the CB was
+ invalid. This usually indicates a software failure. */
+
+ case 0x16: /* Invalid CCB Operation Code-The first byte of the CCB was invalid.
+ This usually indicates a software failure. */
+
+ case 0x17: /* Linked CCB does not have the same LUN-A subsequent CCB of a set
+ of linked CCB's does not specify the same logical unit number as
+ the first. */
+ case 0x18: /* Invalid Target Direction received from Host-The direction of a
+ Target Mode CCB was invalid. */
+
+ case 0x19: /* Duplicate CCB Received in Target Mode-More than once CCB was
+ received to service data transfer between the same target LUN
+ and initiator SCSI ID in the same direction. */
+
+ case 0x1a: /* Invalid CCB or Segment List Parameter-A segment list with a zero
+ length segment or invalid segment list boundaries was received.
+ A CCB parameter was invalid. */
+ DEB(printk("Aha1542: %x %x\n", hosterr, scsierr));
+ hosterr = DID_ERROR; /* Couldn't find any better */
+ break;
+
+ case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
+ phase sequence was requested by the target. The host adapter
+ will generate a SCSI Reset Condition, notifying the host with
+ a SCRD interrupt */
+ hosterr = DID_RESET;
+ break;
+ default:
+ printk("makecode: unknown hoststatus %x\n", hosterr);
+ break;
+ }
+ return scsierr|(hosterr << 16);
+}
+
+static int aha1542_test_port(int bse, struct Scsi_Host * shpnt)
+{
+ int i;
+ unchar inquiry_cmd[] = {CMD_INQUIRY };
+ unchar inquiry_result[4];
+ unchar *cmdp;
+ int len;
+ volatile int debug = 0;
+
+ /* Quick and dirty test for presence of the card. */
+ if(inb(STATUS(bse)) == 0xff) return 0;
+
+ /* Reset the adapter. I ought to make a hard reset, but it's not really necessary */
+
+ /* DEB(printk("aha1542_test_port called \n")); */
+
+ /* In case some other card was probing here, reset interrupts */
+ aha1542_intr_reset(bse); /* reset interrupts, so they don't block */
+
+ outb(SRST|IRST/*|SCRST*/, CONTROL(bse));
+
+ i = jiffies + 2;
+ while (i>jiffies); /* Wait a little bit for things to settle down. */
+
+ debug = 1;
+ /* Expect INIT and IDLE, any of the others are bad */
+ WAIT(STATUS(bse), STATMASK, INIT|IDLE, STST|DIAGF|INVDCMD|DF|CDF);
+
+ debug = 2;
+ /* Shouldn't have generated any interrupts during reset */
+ if (inb(INTRFLAGS(bse))&INTRMASK) goto fail;
+
+
+ /* Perform a host adapter inquiry instead so we do not need to set
+ up the mailboxes ahead of time */
+
+ aha1542_out(bse, inquiry_cmd, 1);
+
+ debug = 3;
+ len = 4;
+ cmdp = &inquiry_result[0];
+
+ while (len--)
+ {
+ WAIT(STATUS(bse), DF, DF, 0);
+ *cmdp++ = inb(DATA(bse));
+ }
+
+ debug = 8;
+ /* Reading port should reset DF */
+ if (inb(STATUS(bse)) & DF) goto fail;
+
+ debug = 9;
+ /* When HACC, command is completed, and we're though testing */
+ WAIT(INTRFLAGS(bse), HACC, HACC, 0);
+ /* now initialize adapter */
+
+ debug = 10;
+ /* Clear interrupts */
+ outb(IRST, CONTROL(bse));
+
+ debug = 11;
+
+ return debug; /* 1 = ok */
+ fail:
+ return 0; /* 0 = not ok */
+}
+
+/* A "high" level interrupt handler */
+static void aha1542_intr_handle(int irq, void *dev_id, struct pt_regs *regs)
+{
+ void (*my_done)(Scsi_Cmnd *) = NULL;
+ int errstatus, mbi, mbo, mbistatus;
+ int number_serviced;
+ unsigned int flags;
+ struct Scsi_Host * shost;
+ Scsi_Cmnd * SCtmp;
+ int flag;
+ int needs_restart;
+ struct mailbox * mb;
+ struct ccb *ccb;
+
+ shost = aha_host[irq - 9];
+ if(!shost) panic("Splunge!");
+
+ mb = HOSTDATA(shost)->mb;
+ ccb = HOSTDATA(shost)->ccb;
+
+#ifdef DEBUG
+ {
+ flag = inb(INTRFLAGS(shost->io_port));
+ printk("aha1542_intr_handle: ");
+ if (!(flag&ANYINTR)) printk("no interrupt?");
+ if (flag&MBIF) printk("MBIF ");
+ if (flag&MBOA) printk("MBOF ");
+ if (flag&HACC) printk("HACC ");
+ if (flag&SCRD) printk("SCRD ");
+ printk("status %02x\n", inb(STATUS(shost->io_port)));
+ };
+#endif
+ number_serviced = 0;
+ needs_restart = 0;
+
+ while(1==1){
+ flag = inb(INTRFLAGS(shost->io_port));
+
+ /* Check for unusual interrupts. If any of these happen, we should
+ probably do something special, but for now just printing a message
+ is sufficient. A SCSI reset detected is something that we really
+ need to deal with in some way. */
+ if (flag & ~MBIF) {
+ if (flag&MBOA) printk("MBOF ");
+ if (flag&HACC) printk("HACC ");
+ if (flag&SCRD) {
+ needs_restart = 1;
+ printk("SCRD ");
+ }
+ }
+
+ aha1542_intr_reset(shost->io_port);
+
+ save_flags(flags);
+ cli();
+ mbi = HOSTDATA(shost)->aha1542_last_mbi_used + 1;
+ if (mbi >= 2*AHA1542_MAILBOXES) mbi = AHA1542_MAILBOXES;
+
+ do{
+ if(mb[mbi].status != 0) break;
+ mbi++;
+ if (mbi >= 2*AHA1542_MAILBOXES) mbi = AHA1542_MAILBOXES;
+ } while (mbi != HOSTDATA(shost)->aha1542_last_mbi_used);
+
+ if(mb[mbi].status == 0){
+ restore_flags(flags);
+ /* Hmm, no mail. Must have read it the last time around */
+ if (!number_serviced && !needs_restart)
+ printk("aha1542.c: interrupt received, but no mail.\n");
+ /* We detected a reset. Restart all pending commands for
+ devices that use the hard reset option */
+ if(needs_restart) aha1542_restart(shost);
+ return;
+ };
+
+ mbo = (scsi2int(mb[mbi].ccbptr) - ((unsigned int) &ccb[0])) / sizeof(struct ccb);
+ mbistatus = mb[mbi].status;
+ mb[mbi].status = 0;
+ HOSTDATA(shost)->aha1542_last_mbi_used = mbi;
+ restore_flags(flags);
+
+#ifdef DEBUG
+ {
+ if (ccb[mbo].tarstat|ccb[mbo].hastat)
+ printk("aha1542_command: returning %x (status %d)\n",
+ ccb[mbo].tarstat + ((int) ccb[mbo].hastat << 16), mb[mbi].status);
+ };
+#endif
+
+ if(mbistatus == 3) continue; /* Aborted command not found */
+
+#ifdef DEBUG
+ printk("...done %d %d\n",mbo, mbi);
+#endif
+
+ SCtmp = HOSTDATA(shost)->SCint[mbo];
+
+ if (!SCtmp || !SCtmp->scsi_done) {
+ printk("aha1542_intr_handle: Unexpected interrupt\n");
+ printk("tarstat=%x, hastat=%x idlun=%x ccb#=%d \n", ccb[mbo].tarstat,
+ ccb[mbo].hastat, ccb[mbo].idlun, mbo);
+ return;
+ }
+
+ my_done = SCtmp->scsi_done;
+ if (SCtmp->host_scribble) scsi_free(SCtmp->host_scribble, 512);
+
+ /* Fetch the sense data, and tuck it away, in the required slot. The
+ Adaptec automatically fetches it, and there is no guarantee that
+ we will still have it in the cdb when we come back */
+ if (ccb[mbo].tarstat == 2)
+ memcpy(SCtmp->sense_buffer, &ccb[mbo].cdb[ccb[mbo].cdblen],
+ sizeof(SCtmp->sense_buffer));
+
+
+ /* is there mail :-) */
+
+ /* more error checking left out here */
+ if (mbistatus != 1)
+ /* This is surely wrong, but I don't know what's right */
+ errstatus = makecode(ccb[mbo].hastat, ccb[mbo].tarstat);
+ else
+ errstatus = 0;
+
+#ifdef DEBUG
+ if(errstatus) printk("(aha1542 error:%x %x %x) ",errstatus,
+ ccb[mbo].hastat, ccb[mbo].tarstat);
+#endif
+
+ if (ccb[mbo].tarstat == 2) {
+#ifdef DEBUG
+ int i;
+#endif
+ DEB(printk("aha1542_intr_handle: sense:"));
+#ifdef DEBUG
+ for (i = 0; i < 12; i++)
+ printk("%02x ", ccb[mbo].cdb[ccb[mbo].cdblen+i]);
+ printk("\n");
+#endif
+ /*
+ DEB(printk("aha1542_intr_handle: buf:"));
+ for (i = 0; i < bufflen; i++)
+ printk("%02x ", ((unchar *)buff)[i]);
+ printk("\n");
+ */
+ }
+ DEB(if (errstatus) printk("aha1542_intr_handle: returning %6x\n", errstatus));
+ SCtmp->result = errstatus;
+ HOSTDATA(shost)->SCint[mbo] = NULL; /* This effectively frees up the mailbox slot, as
+ far as queuecommand is concerned */
+ my_done(SCtmp);
+ number_serviced++;
+ };
+}
+
+int aha1542_queuecommand(Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *))
+{
+ unchar ahacmd = CMD_START_SCSI;
+ unchar direction;
+ unchar *cmd = (unchar *) SCpnt->cmnd;
+ unchar target = SCpnt->target;
+ unchar lun = SCpnt->lun;
+ unsigned long flags;
+ void *buff = SCpnt->request_buffer;
+ int bufflen = SCpnt->request_bufflen;
+ int mbo;
+ struct mailbox * mb;
+ struct ccb *ccb;
+
+ DEB(int i);
+
+ mb = HOSTDATA(SCpnt->host)->mb;
+ ccb = HOSTDATA(SCpnt->host)->ccb;
+
+ DEB(if (target > 1) {
+ SCpnt->result = DID_TIME_OUT << 16;
+ done(SCpnt); return 0;});
+
+ if(*cmd == REQUEST_SENSE){
+#ifndef DEBUG
+ if (bufflen != sizeof(SCpnt->sense_buffer)) {
+ printk("Wrong buffer length supplied for request sense (%d)\n",bufflen);
+ };
+#endif
+ SCpnt->result = 0;
+ done(SCpnt);
+ return 0;
+ };
+
+#ifdef DEBUG
+ if (*cmd == READ_10 || *cmd == WRITE_10)
+ i = xscsi2int(cmd+2);
+ else if (*cmd == READ_6 || *cmd == WRITE_6)
+ i = scsi2int(cmd+2);
+ else
+ i = -1;
+ if (done)
+ printk("aha1542_queuecommand: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
+ else
+ printk("aha1542_command: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
+ aha1542_stat();
+ printk("aha1542_queuecommand: dumping scsi cmd:");
+ for (i = 0; i < SCpnt->cmd_len; i++) printk("%02x ", cmd[i]);
+ printk("\n");
+ if (*cmd == WRITE_10 || *cmd == WRITE_6)
+ return 0; /* we are still testing, so *don't* write */
+#endif
+/* Use the outgoing mailboxes in a round-robin fashion, because this
+ is how the host adapter will scan for them */
+
+ save_flags(flags);
+ cli();
+ mbo = HOSTDATA(SCpnt->host)->aha1542_last_mbo_used + 1;
+ if (mbo >= AHA1542_MAILBOXES) mbo = 0;
+
+ do{
+ if(mb[mbo].status == 0 && HOSTDATA(SCpnt->host)->SCint[mbo] == NULL)
+ break;
+ mbo++;
+ if (mbo >= AHA1542_MAILBOXES) mbo = 0;
+ } while (mbo != HOSTDATA(SCpnt->host)->aha1542_last_mbo_used);
+
+ if(mb[mbo].status || HOSTDATA(SCpnt->host)->SCint[mbo])
+ panic("Unable to find empty mailbox for aha1542.\n");
+
+ HOSTDATA(SCpnt->host)->SCint[mbo] = SCpnt; /* This will effectively prevent someone else from
+ screwing with this cdb. */
+
+ HOSTDATA(SCpnt->host)->aha1542_last_mbo_used = mbo;
+ restore_flags(flags);
+
+#ifdef DEBUG
+ printk("Sending command (%d %x)...",mbo, done);
+#endif
+
+ any2scsi(mb[mbo].ccbptr, &ccb[mbo]); /* This gets trashed for some reason*/
+
+ memset(&ccb[mbo], 0, sizeof(struct ccb));
+
+ ccb[mbo].cdblen = SCpnt->cmd_len;
+
+ direction = 0;
+ if (*cmd == READ_10 || *cmd == READ_6)
+ direction = 8;
+ else if (*cmd == WRITE_10 || *cmd == WRITE_6)
+ direction = 16;
+
+ memcpy(ccb[mbo].cdb, cmd, ccb[mbo].cdblen);
+
+ if (SCpnt->use_sg) {
+ struct scatterlist * sgpnt;
+ struct chain * cptr;
+#ifdef DEBUG
+ unsigned char * ptr;
+#endif
+ int i;
+ ccb[mbo].op = 2; /* SCSI Initiator Command w/scatter-gather*/
+ SCpnt->host_scribble = (unsigned char *) scsi_malloc(512);
+ sgpnt = (struct scatterlist *) SCpnt->request_buffer;
+ cptr = (struct chain *) SCpnt->host_scribble;
+ if (cptr == NULL) panic("aha1542.c: unable to allocate DMA memory\n");
+ for(i=0; i<SCpnt->use_sg; i++) {
+ if(sgpnt[i].length == 0 || SCpnt->use_sg > 16 ||
+ (((int)sgpnt[i].address) & 1) || (sgpnt[i].length & 1)){
+ unsigned char * ptr;
+ printk("Bad segment list supplied to aha1542.c (%d, %d)\n",SCpnt->use_sg,i);
+ for(i=0;i<SCpnt->use_sg;i++){
+ printk("%d: %x %x %d\n",i,(unsigned int) sgpnt[i].address, (unsigned int) sgpnt[i].alt_address,
+ sgpnt[i].length);
+ };
+ printk("cptr %x: ",(unsigned int) cptr);
+ ptr = (unsigned char *) &cptr[i];
+ for(i=0;i<18;i++) printk("%02x ", ptr[i]);
+ panic("Foooooooood fight!");
+ };
+ any2scsi(cptr[i].dataptr, sgpnt[i].address);
+ if(((unsigned int) sgpnt[i].address) & 0xff000000) goto baddma;
+ any2scsi(cptr[i].datalen, sgpnt[i].length);
+ };
+ any2scsi(ccb[mbo].datalen, SCpnt->use_sg * sizeof(struct chain));
+ any2scsi(ccb[mbo].dataptr, cptr);
+#ifdef DEBUG
+ printk("cptr %x: ",cptr);
+ ptr = (unsigned char *) cptr;
+ for(i=0;i<18;i++) printk("%02x ", ptr[i]);
+#endif
+ } else {
+ ccb[mbo].op = 0; /* SCSI Initiator Command */
+ SCpnt->host_scribble = NULL;
+ any2scsi(ccb[mbo].datalen, bufflen);
+ if(((unsigned int) buff & 0xff000000)) goto baddma;
+ any2scsi(ccb[mbo].dataptr, buff);
+ };
+ ccb[mbo].idlun = (target&7)<<5 | direction | (lun & 7); /*SCSI Target Id*/
+ ccb[mbo].rsalen = 16;
+ ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
+ ccb[mbo].commlinkid = 0;
+
+#ifdef DEBUG
+ { int i;
+ printk("aha1542_command: sending.. ");
+ for (i = 0; i < sizeof(ccb[mbo])-10; i++)
+ printk("%02x ", ((unchar *)&ccb[mbo])[i]);
+ };
+#endif
+
+ if (done) {
+ DEB(printk("aha1542_queuecommand: now waiting for interrupt "); aha1542_stat());
+ SCpnt->scsi_done = done;
+ mb[mbo].status = 1;
+ aha1542_out(SCpnt->host->io_port, &ahacmd, 1); /* start scsi command */
+ DEB(aha1542_stat());
+ }
+ else
+ printk("aha1542_queuecommand: done can't be NULL\n");
+
+ return 0;
+ baddma:
+ panic("Buffer at address > 16Mb used for 1542B");
+}
+
+static void internal_done(Scsi_Cmnd * SCpnt)
+{
+ SCpnt->SCp.Status++;
+}
+
+int aha1542_command(Scsi_Cmnd * SCpnt)
+{
+ DEB(printk("aha1542_command: ..calling aha1542_queuecommand\n"));
+
+ aha1542_queuecommand(SCpnt, internal_done);
+
+ SCpnt->SCp.Status = 0;
+ while (!SCpnt->SCp.Status)
+ barrier();
+ return SCpnt->result;
+}
+
+/* Initialize mailboxes */
+static void setup_mailboxes(int bse, struct Scsi_Host * shpnt)
+{
+ int i;
+ struct mailbox * mb;
+ struct ccb *ccb;
+
+ unchar cmd[5] = {CMD_MBINIT, AHA1542_MAILBOXES, 0, 0, 0};
+
+ mb = HOSTDATA(shpnt)->mb;
+ ccb = HOSTDATA(shpnt)->ccb;
+
+ for(i=0; i<AHA1542_MAILBOXES; i++){
+ mb[i].status = mb[AHA1542_MAILBOXES+i].status = 0;
+ any2scsi(mb[i].ccbptr, &ccb[i]);
+ };
+ aha1542_intr_reset(bse); /* reset interrupts, so they don't block */
+ any2scsi((cmd+2), mb);
+ aha1542_out(bse, cmd, 5);
+ WAIT(INTRFLAGS(bse), INTRMASK, HACC, 0);
+ while (0) {
+ fail:
+ printk("aha1542_detect: failed setting up mailboxes\n");
+ }
+ aha1542_intr_reset(bse);
+}
+
+static int aha1542_getconfig(int base_io, unsigned char * irq_level, unsigned char * dma_chan, unsigned char * scsi_id)
+{
+ unchar inquiry_cmd[] = {CMD_RETCONF };
+ unchar inquiry_result[3];
+ int i;
+ i = inb(STATUS(base_io));
+ if (i & DF) {
+ i = inb(DATA(base_io));
+ };
+ aha1542_out(base_io, inquiry_cmd, 1);
+ aha1542_in(base_io, inquiry_result, 3);
+ WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
+ while (0) {
+ fail:
+ printk("aha1542_detect: query board settings\n");
+ }
+ aha1542_intr_reset(base_io);
+ switch(inquiry_result[0]){
+ case 0x80:
+ *dma_chan = 7;
+ break;
+ case 0x40:
+ *dma_chan = 6;
+ break;
+ case 0x20:
+ *dma_chan = 5;
+ break;
+ case 0x01:
+ *dma_chan = 0;
+ break;
+ case 0:
+ /* This means that the adapter, although Adaptec 1542 compatible, doesn't use a DMA channel.
+ Currently only aware of the BusLogic BT-445S VL-Bus adapter which needs this. */
+ *dma_chan = 0xFF;
+ break;
+ default:
+ printk("Unable to determine Adaptec DMA priority. Disabling board\n");
+ return -1;
+ };
+ switch(inquiry_result[1]){
+ case 0x40:
+ *irq_level = 15;
+ break;
+ case 0x20:
+ *irq_level = 14;
+ break;
+ case 0x8:
+ *irq_level = 12;
+ break;
+ case 0x4:
+ *irq_level = 11;
+ break;
+ case 0x2:
+ *irq_level = 10;
+ break;
+ case 0x1:
+ *irq_level = 9;
+ break;
+ default:
+ printk("Unable to determine Adaptec IRQ level. Disabling board\n");
+ return -1;
+ };
+ *scsi_id=inquiry_result[2] & 7;
+ return 0;
+}
+
+/* This function should only be called for 1542C boards - we can detect
+ the special firmware settings and unlock the board */
+
+static int aha1542_mbenable(int base)
+{
+ static unchar mbenable_cmd[3];
+ static unchar mbenable_result[2];
+ int retval;
+
+ retval = BIOS_TRANSLATION_6432;
+
+ mbenable_cmd[0]=CMD_EXTBIOS;
+ aha1542_out(base,mbenable_cmd,1);
+ if(aha1542_in1(base,mbenable_result,2))
+ return retval;
+ WAITd(INTRFLAGS(base),INTRMASK,HACC,0,100);
+ aha1542_intr_reset(base);
+
+ if ((mbenable_result[0] & 0x08) || mbenable_result[1]) {
+ mbenable_cmd[0]=CMD_MBENABLE;
+ mbenable_cmd[1]=0;
+ mbenable_cmd[2]=mbenable_result[1];
+
+ if((mbenable_result[0] & 0x08) && (mbenable_result[1] & 0x03)) retval = BIOS_TRANSLATION_25563;
+
+ aha1542_out(base,mbenable_cmd,3);
+ WAIT(INTRFLAGS(base),INTRMASK,HACC,0);
+ };
+ while(0) {
+fail:
+ printk("aha1542_mbenable: Mailbox init failed\n");
+ }
+aha1542_intr_reset(base);
+return retval;
+}
+
+/* Query the board to find out if it is a 1542 or a 1740, or whatever. */
+static int aha1542_query(int base_io, int * transl)
+{
+ unchar inquiry_cmd[] = {CMD_INQUIRY };
+ unchar inquiry_result[4];
+ int i;
+ i = inb(STATUS(base_io));
+ if (i & DF) {
+ i = inb(DATA(base_io));
+ };
+ aha1542_out(base_io, inquiry_cmd, 1);
+ aha1542_in(base_io, inquiry_result, 4);
+ WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
+ while (0) {
+ fail:
+ printk("aha1542_detect: query card type\n");
+ }
+ aha1542_intr_reset(base_io);
+
+ *transl = BIOS_TRANSLATION_6432; /* Default case */
+
+/* For an AHA1740 series board, we ignore the board since there is a
+ hardware bug which can lead to wrong blocks being returned if the board
+ is operating in the 1542 emulation mode. Since there is an extended mode
+ driver, we simply ignore the board and let the 1740 driver pick it up.
+*/
+
+ if (inquiry_result[0] == 0x43) {
+ printk("aha1542.c: Emulation mode not supported for AHA 174N hardware.\n");
+ return 1;
+ };
+
+ /* Always call this - boards that do not support extended bios translation
+ will ignore the command, and we will set the proper default */
+
+ *transl = aha1542_mbenable(base_io);
+
+ return 0;
+}
+
+/* called from init/main.c */
+void aha1542_setup( char *str, int *ints)
+{
+ const char *ahausage = "aha1542: usage: aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]]\n";
+ static int setup_idx = 0;
+ int setup_portbase;
+
+ if(setup_idx >= MAXBOARDS)
+ {
+ printk("aha1542: aha1542_setup called too many times! Bad LILO params ?\n");
+ printk(" Entryline 1: %s\n",setup_str[0]);
+ printk(" Entryline 2: %s\n",setup_str[1]);
+ printk(" This line: %s\n",str);
+ return;
+ }
+ if (ints[0] < 1 || ints[0] > 4)
+ {
+ printk("aha1542: %s\n", str );
+ printk(ahausage);
+ printk("aha1542: Wrong parameters may cause system malfunction.. We try anyway..\n");
+ }
+
+ setup_called[setup_idx]=ints[0];
+ setup_str[setup_idx]=str;
+
+ setup_portbase = ints[0] >= 1 ? ints[1] : 0; /* Preserve the default value.. */
+ setup_buson [setup_idx] = ints[0] >= 2 ? ints[2] : 7;
+ setup_busoff [setup_idx] = ints[0] >= 3 ? ints[3] : 5;
+ if (ints[0] >= 4) {
+ int atbt = -1;
+ switch (ints[4]) {
+ case 5:
+ atbt = 0x00;
+ break;
+ case 6:
+ atbt = 0x04;
+ break;
+ case 7:
+ atbt = 0x01;
+ break;
+ case 8:
+ atbt = 0x02;
+ break;
+ case 10:
+ atbt = 0x03;
+ break;
+ default:
+ printk("aha1542: %s\n", str );
+ printk(ahausage);
+ printk("aha1542: Valid values for DMASPEED are 5-8, 10 MB/s. Using jumper defaults.\n");
+ break;
+ }
+ setup_dmaspeed[setup_idx] = atbt;
+ }
+
+ if (setup_portbase != 0)
+ bases[setup_idx] = setup_portbase;
+
+ ++setup_idx;
+}
+
+/* return non-zero on detection */
+int aha1542_detect(Scsi_Host_Template * tpnt)
+{
+ unsigned char dma_chan;
+ unsigned char irq_level;
+ unsigned char scsi_id;
+ unsigned long flags;
+ unsigned int base_io;
+ int trans;
+ struct Scsi_Host * shpnt = NULL;
+ int count = 0;
+ int indx;
+
+ DEB(printk("aha1542_detect: \n"));
+
+ tpnt->proc_dir = &proc_scsi_aha1542;
+
+ for(indx = 0; indx < sizeof(bases)/sizeof(bases[0]); indx++)
+ if(bases[indx] != 0 && !check_region(bases[indx], 4)) {
+ shpnt = scsi_register(tpnt,
+ sizeof(struct aha1542_hostdata));
+
+ /* For now we do this - until kmalloc is more intelligent
+ we are resigned to stupid hacks like this */
+ if ((unsigned int) shpnt > 0xffffff) {
+ printk("Invalid address for shpnt with 1542.\n");
+ goto unregister;
+ }
+
+ if(!aha1542_test_port(bases[indx], shpnt)) goto unregister;
+
+
+ base_io = bases[indx];
+
+ /* Set the Bus on/off-times as not to ruin floppy performance */
+ {
+ unchar oncmd[] = {CMD_BUSON_TIME, 7};
+ unchar offcmd[] = {CMD_BUSOFF_TIME, 5};
+
+ if(setup_called[indx])
+ {
+ oncmd[1] = setup_buson[indx];
+ offcmd[1] = setup_busoff[indx];
+ }
+
+ aha1542_intr_reset(base_io);
+ aha1542_out(base_io, oncmd, 2);
+ WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
+ aha1542_intr_reset(base_io);
+ aha1542_out(base_io, offcmd, 2);
+ WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
+ if (setup_dmaspeed[indx] >= 0)
+ {
+ unchar dmacmd[] = {CMD_DMASPEED, 0};
+ dmacmd[1] = setup_dmaspeed[indx];
+ aha1542_intr_reset(base_io);
+ aha1542_out(base_io, dmacmd, 2);
+ WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
+ }
+ while (0) {
+ fail:
+ printk("aha1542_detect: setting bus on/off-time failed\n");
+ }
+ aha1542_intr_reset(base_io);
+ }
+ if(aha1542_query(base_io, &trans)) goto unregister;
+
+ if (aha1542_getconfig(base_io, &irq_level, &dma_chan, &scsi_id) == -1) goto unregister;
+
+ printk("Configuring Adaptec (SCSI-ID %d) at IO:%x, IRQ %d", scsi_id, base_io, irq_level);
+ if (dma_chan != 0xFF)
+ printk(", DMA priority %d", dma_chan);
+ printk("\n");
+
+ DEB(aha1542_stat());
+ setup_mailboxes(base_io, shpnt);
+
+ DEB(aha1542_stat());
+
+ DEB(printk("aha1542_detect: enable interrupt channel %d\n", irq_level));
+ save_flags(flags);
+ cli();
+ if (request_irq(irq_level,aha1542_intr_handle, 0, "aha1542", NULL)) {
+ printk("Unable to allocate IRQ for adaptec controller.\n");
+ restore_flags(flags);
+ goto unregister;
+ }
+
+ if (dma_chan != 0xFF) {
+ if (request_dma(dma_chan,"aha1542")) {
+ printk("Unable to allocate DMA channel for Adaptec.\n");
+ free_irq(irq_level, NULL);
+ restore_flags(flags);
+ goto unregister;
+ }
+
+ if (dma_chan == 0 || dma_chan >= 5) {
+ set_dma_mode(dma_chan, DMA_MODE_CASCADE);
+ enable_dma(dma_chan);
+ }
+ }
+ aha_host[irq_level - 9] = shpnt;
+ shpnt->this_id = scsi_id;
+ shpnt->unique_id = base_io;
+ shpnt->io_port = base_io;
+ shpnt->n_io_port = 4; /* Number of bytes of I/O space used */
+ shpnt->dma_channel = dma_chan;
+ shpnt->irq = irq_level;
+ HOSTDATA(shpnt)->bios_translation = trans;
+ if(trans == BIOS_TRANSLATION_25563)
+ printk("aha1542.c: Using extended bios translation\n");
+ HOSTDATA(shpnt)->aha1542_last_mbi_used = (2*AHA1542_MAILBOXES - 1);
+ HOSTDATA(shpnt)->aha1542_last_mbo_used = (AHA1542_MAILBOXES - 1);
+ memset(HOSTDATA(shpnt)->SCint, 0, sizeof(HOSTDATA(shpnt)->SCint));
+ restore_flags(flags);
+#if 0
+ DEB(printk(" *** READ CAPACITY ***\n"));
+
+ {
+ unchar buf[8];
+ static unchar cmd[] = { READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+ int i;
+
+ for (i = 0; i < sizeof(buf); ++i) buf[i] = 0x87;
+ for (i = 0; i < 2; ++i)
+ if (!aha1542_command(i, cmd, buf, sizeof(buf))) {
+ printk("aha_detect: LU %d sector_size %d device_size %d\n",
+ i, xscsi2int(buf+4), xscsi2int(buf));
+ }
+ }
+
+ DEB(printk(" *** NOW RUNNING MY OWN TEST *** \n"));
+
+ for (i = 0; i < 4; ++i)
+ {
+ unsigned char cmd[10];
+ static buffer[512];
+
+ cmd[0] = READ_10;
+ cmd[1] = 0;
+ xany2scsi(cmd+2, i);
+ cmd[6] = 0;
+ cmd[7] = 0;
+ cmd[8] = 1;
+ cmd[9] = 0;
+ aha1542_command(0, cmd, buffer, 512);
+ }
+#endif
+ request_region(bases[indx], 4,"aha1542"); /* Register the IO ports that we use */
+ count++;
+ continue;
+ unregister:
+ scsi_unregister(shpnt);
+ continue;
+
+ };
+
+ return count;
+}
+
+static int aha1542_restart(struct Scsi_Host * shost)
+{
+ int i;
+ int count = 0;
+#if 0
+ unchar ahacmd = CMD_START_SCSI;
+#endif
+
+ for(i=0; i< AHA1542_MAILBOXES; i++)
+ if(HOSTDATA(shost)->SCint[i] &&
+ !(HOSTDATA(shost)->SCint[i]->device->soft_reset))
+ {
+#if 0
+ HOSTDATA(shost)->mb[i].status = 1; /* Indicate ready to restart... */
+#endif
+ count++;
+ }
+
+ printk("Potential to restart %d stalled commands...\n", count);
+#if 0
+ /* start scsi command */
+ if (count) aha1542_out(shost->io_port, &ahacmd, 1);
+#endif
+ return 0;
+}
+
+/* The abort command does not leave the device in a clean state where
+ it is available to be used again. Until this gets worked out, we will
+ leave it commented out. */
+
+int aha1542_abort(Scsi_Cmnd * SCpnt)
+{
+#if 0
+ unchar ahacmd = CMD_START_SCSI;
+ unsigned long flags;
+ struct mailbox * mb;
+ int mbi, mbo, i;
+
+ printk("In aha1542_abort: %x %x\n",
+ inb(STATUS(SCpnt->host->io_port)),
+ inb(INTRFLAGS(SCpnt->host->io_port)));
+
+ save_flags(flags);
+ cli();
+ mb = HOSTDATA(SCpnt->host)->mb;
+ mbi = HOSTDATA(SCpnt->host)->aha1542_last_mbi_used + 1;
+ if (mbi >= 2*AHA1542_MAILBOXES) mbi = AHA1542_MAILBOXES;
+
+ do{
+ if(mb[mbi].status != 0) break;
+ mbi++;
+ if (mbi >= 2*AHA1542_MAILBOXES) mbi = AHA1542_MAILBOXES;
+ } while (mbi != HOSTDATA(SCpnt->host)->aha1542_last_mbi_used);
+ restore_flags(flags);
+
+ if(mb[mbi].status) {
+ printk("Lost interrupt discovered on irq %d - attempting to recover\n",
+ SCpnt->host->irq);
+ aha1542_intr_handle(SCpnt->host->irq, NULL);
+ return 0;
+ }
+
+ /* OK, no lost interrupt. Try looking to see how many pending commands
+ we think we have. */
+
+ for(i=0; i< AHA1542_MAILBOXES; i++)
+ if(HOSTDATA(SCpnt->host)->SCint[i])
+ {
+ if(HOSTDATA(SCpnt->host)->SCint[i] == SCpnt) {
+ printk("Timed out command pending for %s\n",
+ kdevname(SCpnt->request.rq_dev));
+ if (HOSTDATA(SCpnt->host)->mb[i].status) {
+ printk("OGMB still full - restarting\n");
+ aha1542_out(SCpnt->host->io_port, &ahacmd, 1);
+ };
+ } else
+ printk("Other pending command %s\n",
+ kdevname(SCpnt->request.rq_dev));
+ }
+
+#endif
+
+ DEB(printk("aha1542_abort\n"));
+#if 0
+ save_flags(flags);
+ cli();
+ for(mbo = 0; mbo < AHA1542_MAILBOXES; mbo++)
+ if (SCpnt == HOSTDATA(SCpnt->host)->SCint[mbo]){
+ mb[mbo].status = 2; /* Abort command */
+ aha1542_out(SCpnt->host->io_port, &ahacmd, 1); /* start scsi command */
+ restore_flags(flags);
+ break;
+ };
+#endif
+ return SCSI_ABORT_SNOOZE;
+}
+
+/* We do not implement a reset function here, but the upper level code
+ assumes that it will get some kind of response for the command in
+ SCpnt. We must oblige, or the command will hang the scsi system.
+ For a first go, we assume that the 1542 notifies us with all of the
+ pending commands (it does implement soft reset, after all). */
+
+int aha1542_reset(Scsi_Cmnd * SCpnt, unsigned int reset_flags)
+{
+ unchar ahacmd = CMD_START_SCSI;
+ int i;
+
+ /*
+ * See if a bus reset was suggested.
+ */
+ if( reset_flags & SCSI_RESET_SUGGEST_BUS_RESET )
+ {
+ /*
+ * This does a scsi reset for all devices on the bus.
+ * In principle, we could also reset the 1542 - should
+ * we do this? Try this first, and we can add that later
+ * if it turns out to be useful.
+ */
+ outb(HRST | SCRST, CONTROL(SCpnt->host->io_port));
+
+ /*
+ * Wait for the thing to settle down a bit. Unfortunately
+ * this is going to basically lock up the machine while we
+ * wait for this to complete. To be 100% correct, we need to
+ * check for timeout, and if we are doing something like this
+ * we are pretty desperate anyways.
+ */
+ WAIT(STATUS(SCpnt->host->io_port),
+ STATMASK, INIT|IDLE, STST|DIAGF|INVDCMD|DF|CDF);
+
+ /*
+ * We need to do this too before the 1542 can interact with
+ * us again.
+ */
+ setup_mailboxes(SCpnt->host->io_port, SCpnt->host);
+
+ /*
+ * Now try to pick up the pieces. Restart all commands
+ * that are currently active on the bus, and reset all of
+ * the datastructures. We have some time to kill while
+ * things settle down, so print a nice message.
+ */
+ printk("Sent BUS RESET to scsi host %d\n", SCpnt->host->host_no);
+
+ for(i=0; i< AHA1542_MAILBOXES; i++)
+ if(HOSTDATA(SCpnt->host)->SCint[i] != NULL)
+ {
+ Scsi_Cmnd * SCtmp;
+ SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
+ SCtmp->result = DID_RESET << 16;
+ if (SCtmp->host_scribble) scsi_free(SCtmp->host_scribble, 512);
+ printk("Sending DID_RESET for target %d\n", SCpnt->target);
+ SCtmp->scsi_done(SCpnt);
+
+ HOSTDATA(SCpnt->host)->SCint[i] = NULL;
+ HOSTDATA(SCpnt->host)->mb[i].status = 0;
+ }
+ /*
+ * Now tell the mid-level code what we did here. Since
+ * we have restarted all of the outstanding commands,
+ * then report SUCCESS.
+ */
+ return (SCSI_RESET_SUCCESS | SCSI_RESET_BUS_RESET);
+fail:
+ printk("aha1542.c: Unable to perform hard reset.\n");
+ printk("Power cycle machine to reset\n");
+ return (SCSI_RESET_ERROR | SCSI_RESET_BUS_RESET);
+
+
+ }
+ else
+ {
+ /* This does a selective reset of just the one device */
+ /* First locate the ccb for this command */
+ for(i=0; i< AHA1542_MAILBOXES; i++)
+ if(HOSTDATA(SCpnt->host)->SCint[i] == SCpnt)
+ {
+ HOSTDATA(SCpnt->host)->ccb[i].op = 0x81; /* BUS DEVICE RESET */
+ /* Now tell the 1542 to flush all pending commands for this target */
+ aha1542_out(SCpnt->host->io_port, &ahacmd, 1);
+
+ /* Here is the tricky part. What to do next. Do we get an interrupt
+ for the commands that we aborted with the specified target, or
+ do we generate this on our own? Try it without first and see
+ what happens */
+ printk("Sent BUS DEVICE RESET to target %d\n", SCpnt->target);
+
+ /* If the first does not work, then try the second. I think the
+ first option is more likely to be correct. Free the command
+ block for all commands running on this target... */
+ for(i=0; i< AHA1542_MAILBOXES; i++)
+ if(HOSTDATA(SCpnt->host)->SCint[i] &&
+ HOSTDATA(SCpnt->host)->SCint[i]->target == SCpnt->target)
+ {
+ Scsi_Cmnd * SCtmp;
+ SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
+ SCtmp->result = DID_RESET << 16;
+ if (SCtmp->host_scribble) scsi_free(SCtmp->host_scribble, 512);
+ printk("Sending DID_RESET for target %d\n", SCpnt->target);
+ SCtmp->scsi_done(SCpnt);
+
+ HOSTDATA(SCpnt->host)->SCint[i] = NULL;
+ HOSTDATA(SCpnt->host)->mb[i].status = 0;
+ }
+ return SCSI_RESET_SUCCESS;
+ }
+ }
+ /* No active command at this time, so this means that each time we got
+ some kind of response the last time through. Tell the mid-level code
+ to request sense information in order to decide what to do next. */
+ return SCSI_RESET_PUNT;
+}
+
+#include "sd.h"
+
+int aha1542_biosparam(Scsi_Disk * disk, kdev_t dev, int * ip)
+{
+ int translation_algorithm;
+ int size = disk->capacity;
+
+ translation_algorithm = HOSTDATA(disk->device->host)->bios_translation;
+
+ if((size>>11) > 1024 && translation_algorithm == BIOS_TRANSLATION_25563) {
+ /* Please verify that this is the same as what DOS returns */
+ ip[0] = 255;
+ ip[1] = 63;
+ ip[2] = size /255/63;
+ } else {
+ ip[0] = 64;
+ ip[1] = 32;
+ ip[2] = size >> 11;
+ }
+
+ return 0;
+}
+
+
+#ifdef MODULE
+/* Eventually this will go into an include file, but this will be later */
+Scsi_Host_Template driver_template = AHA1542;
+
+#include "scsi_module.c"
+#endif
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-30 21:25:43 +0000