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path: root/linux/src/drivers/scsi/aha1740.c
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Diffstat (limited to 'linux/src/drivers/scsi/aha1740.c')
-rw-r--r--linux/src/drivers/scsi/aha1740.c614
1 files changed, 614 insertions, 0 deletions
diff --git a/linux/src/drivers/scsi/aha1740.c b/linux/src/drivers/scsi/aha1740.c
new file mode 100644
index 0000000..013218c
--- /dev/null
+++ b/linux/src/drivers/scsi/aha1740.c
@@ -0,0 +1,614 @@
+/* $Id: aha1740.c,v 1.1 1999/04/26 05:54:13 tb Exp $
+ * 1993/03/31
+ * linux/kernel/aha1740.c
+ *
+ * Based loosely on aha1542.c which is
+ * Copyright (C) 1992 Tommy Thorn and
+ * Modified by Eric Youngdale
+ *
+ * This file is aha1740.c, written and
+ * Copyright (C) 1992,1993 Brad McLean
+ *
+ * Modifications to makecode and queuecommand
+ * for proper handling of multiple devices courteously
+ * provided by Michael Weller, March, 1993
+ *
+ * Multiple adapter support, extended translation detection,
+ * update to current scsi subsystem changes, proc fs support,
+ * working (!) module support based on patches from Andreas Arens,
+ * by Andreas Degert <ad@papyrus.hamburg.com>, 2/1997
+ *
+ * aha1740_makecode may still need even more work
+ * if it doesn't work for your devices, take a look.
+ */
+
+#ifdef MODULE
+#include <linux/module.h>
+#endif
+
+#include <linux/kernel.h>
+#include <linux/head.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/proc_fs.h>
+#include <linux/sched.h>
+#include <asm/dma.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <linux/blk.h>
+#include "scsi.h"
+#include "hosts.h"
+#include "sd.h"
+
+#include "aha1740.h"
+#include<linux/stat.h>
+
+struct proc_dir_entry proc_scsi_aha1740 = {
+ PROC_SCSI_AHA1740, 7, "aha1740",
+ S_IFDIR | S_IRUGO | S_IXUGO, 2
+};
+
+/* IF YOU ARE HAVING PROBLEMS WITH THIS DRIVER, AND WANT TO WATCH
+ IT WORK, THEN:
+#define DEBUG
+*/
+#ifdef DEBUG
+#define DEB(x) x
+#else
+#define DEB(x)
+#endif
+
+/*
+static const char RCSid[] = "$Header: cvs/gnumach/linux/src/drivers/scsi/Attic/aha1740.c,v 1.1 1999/04/26 05:54:13 tb Exp $";
+*/
+
+struct aha1740_hostdata {
+ unsigned int slot;
+ unsigned int translation;
+ unsigned int last_ecb_used;
+ struct ecb ecb[AHA1740_ECBS];
+};
+
+#define HOSTDATA(host) ((struct aha1740_hostdata *) &host->hostdata)
+
+/* One for each IRQ level (9-15) */
+static struct Scsi_Host * aha_host[8] = {NULL, };
+
+int aha1740_proc_info(char *buffer, char **start, off_t offset,
+ int length, int hostno, int inout)
+{
+ int len;
+ struct Scsi_Host * shpnt;
+ struct aha1740_hostdata *host;
+
+ if (inout)
+ return(-ENOSYS);
+
+ for (len = 0; len < 8; len++) {
+ shpnt = aha_host[len];
+ if (shpnt && shpnt->host_no == hostno)
+ break;
+ }
+ host = HOSTDATA(shpnt);
+
+ len = sprintf(buffer, "aha174x at IO:%x, IRQ %d, SLOT %d.\n"
+ "Extended translation %sabled.\n",
+ shpnt->io_port, shpnt->irq, host->slot,
+ host->translation ? "en" : "dis");
+
+ if (offset > len) {
+ *start = buffer;
+ return 0;
+ }
+
+ *start = buffer + offset;
+ len -= offset;
+ if (len > length)
+ len = length;
+ return len;
+}
+
+
+int aha1740_makecode(unchar *sense, unchar *status)
+{
+ struct statusword
+ {
+ ushort don:1, /* Command Done - No Error */
+ du:1, /* Data underrun */
+ :1, qf:1, /* Queue full */
+ sc:1, /* Specification Check */
+ dor:1, /* Data overrun */
+ ch:1, /* Chaining Halted */
+ intr:1, /* Interrupt issued */
+ asa:1, /* Additional Status Available */
+ sns:1, /* Sense information Stored */
+ :1, ini:1, /* Initialization Required */
+ me:1, /* Major error or exception */
+ :1, eca:1, /* Extended Contingent alliance */
+ :1;
+ } status_word;
+ int retval = DID_OK;
+
+ status_word = * (struct statusword *) status;
+#ifdef DEBUG
+ printk("makecode from %x,%x,%x,%x %x,%x,%x,%x",
+ status[0], status[1], status[2], status[3],
+ sense[0], sense[1], sense[2], sense[3]);
+#endif
+ if (!status_word.don) /* Anything abnormal was detected */
+ {
+ if ( (status[1]&0x18) || status_word.sc ) /*Additional info available*/
+ {
+ /* Use the supplied info for further diagnostics */
+ switch ( status[2] )
+ {
+ case 0x12:
+ if ( status_word.dor )
+ retval=DID_ERROR; /* It's an Overrun */
+ /* If not overrun, assume underrun and ignore it! */
+ case 0x00: /* No info, assume no error, should not occur */
+ break;
+ case 0x11:
+ case 0x21:
+ retval=DID_TIME_OUT;
+ break;
+ case 0x0a:
+ retval=DID_BAD_TARGET;
+ break;
+ case 0x04:
+ case 0x05:
+ retval=DID_ABORT;
+ /* Either by this driver or the AHA1740 itself */
+ break;
+ default:
+ retval=DID_ERROR; /* No further diagnostics possible */
+ }
+ }
+ else
+ { /* Michael suggests, and Brad concurs: */
+ if ( status_word.qf )
+ {
+ retval = DID_TIME_OUT; /* forces a redo */
+ /* I think this specific one should not happen -Brad */
+ printk("aha1740.c: WARNING: AHA1740 queue overflow!\n");
+ }
+ else if ( status[0]&0x60 )
+ {
+ retval = DID_ERROR; /* Didn't find a better error */
+ }
+ /* In any other case return DID_OK so for example
+ CONDITION_CHECKS make it through to the appropriate
+ device driver */
+ }
+ }
+ /* Under all circumstances supply the target status -Michael */
+ return status[3] | retval << 16;
+}
+
+int aha1740_test_port(unsigned int base)
+{
+ char name[4], tmp;
+
+ /* Okay, look for the EISA ID's */
+ name[0]= 'A' -1 + ((tmp = inb(HID0(base))) >> 2); /* First character */
+ name[1]= 'A' -1 + ((tmp & 3) << 3);
+ name[1]+= ((tmp = inb(HID1(base))) >> 5)&0x7; /* Second Character */
+ name[2]= 'A' -1 + (tmp & 0x1f); /* Third Character */
+ name[3]=0;
+ tmp = inb(HID2(base));
+ if ( strcmp ( name, HID_MFG ) || inb(HID2(base)) != HID_PRD )
+ return 0; /* Not an Adaptec 174x */
+
+/* if ( inb(HID3(base)) != HID_REV )
+ printk("aha174x: Warning; board revision of %d; expected %d\n",
+ inb(HID3(base)),HID_REV); */
+
+ if ( inb(EBCNTRL(base)) != EBCNTRL_VALUE )
+ {
+ printk("aha174x: Board detected, but EBCNTRL = %x, so disabled it.\n",
+ inb(EBCNTRL(base)));
+ return 0;
+ }
+
+ if ( inb(PORTADR(base)) & PORTADDR_ENH )
+ return 1; /* Okay, we're all set */
+
+ printk("aha174x: Board detected, but not in enhanced mode, so disabled it.\n");
+ return 0;
+}
+
+/* A "high" level interrupt handler */
+void aha1740_intr_handle(int irq, void *dev_id, struct pt_regs * regs)
+{
+ void (*my_done)(Scsi_Cmnd *);
+ int errstatus, adapstat;
+ int number_serviced;
+ struct ecb *ecbptr;
+ Scsi_Cmnd *SCtmp;
+ unsigned int base;
+
+ if (!aha_host[irq - 9])
+ panic("aha1740.c: Irq from unknown host!\n");
+ base = aha_host[irq - 9]->io_port;
+ number_serviced = 0;
+
+ while(inb(G2STAT(base)) & G2STAT_INTPEND)
+ {
+ DEB(printk("aha1740_intr top of loop.\n"));
+ adapstat = inb(G2INTST(base));
+ ecbptr = (struct ecb *) bus_to_virt(inl(MBOXIN0(base)));
+ outb(G2CNTRL_IRST,G2CNTRL(base)); /* interrupt reset */
+
+ switch ( adapstat & G2INTST_MASK )
+ {
+ case G2INTST_CCBRETRY:
+ case G2INTST_CCBERROR:
+ case G2INTST_CCBGOOD:
+ /* Host Ready -> Mailbox in complete */
+ outb(G2CNTRL_HRDY,G2CNTRL(base));
+ if (!ecbptr)
+ {
+ printk("Aha1740 null ecbptr in interrupt (%x,%x,%x,%d)\n",
+ inb(G2STAT(base)),adapstat,
+ inb(G2INTST(base)), number_serviced++);
+ continue;
+ }
+ SCtmp = ecbptr->SCpnt;
+ if (!SCtmp)
+ {
+ printk("Aha1740 null SCtmp in interrupt (%x,%x,%x,%d)\n",
+ inb(G2STAT(base)),adapstat,
+ inb(G2INTST(base)), number_serviced++);
+ continue;
+ }
+ 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 ( (adapstat & G2INTST_MASK) == G2INTST_CCBERROR )
+ {
+ memcpy(SCtmp->sense_buffer, ecbptr->sense,
+ sizeof(SCtmp->sense_buffer));
+ errstatus = aha1740_makecode(ecbptr->sense,ecbptr->status);
+ }
+ else
+ errstatus = 0;
+ DEB(if (errstatus) printk("aha1740_intr_handle: returning %6x\n",
+ errstatus));
+ SCtmp->result = errstatus;
+ my_done = ecbptr->done;
+ memset(ecbptr,0,sizeof(struct ecb));
+ if ( my_done )
+ my_done(SCtmp);
+ break;
+ case G2INTST_HARDFAIL:
+ printk(KERN_ALERT "aha1740 hardware failure!\n");
+ panic("aha1740.c"); /* Goodbye */
+ case G2INTST_ASNEVENT:
+ printk("aha1740 asynchronous event: %02x %02x %02x %02x %02x\n",
+ adapstat, inb(MBOXIN0(base)), inb(MBOXIN1(base)),
+ inb(MBOXIN2(base)), inb(MBOXIN3(base))); /* Say What? */
+ /* Host Ready -> Mailbox in complete */
+ outb(G2CNTRL_HRDY,G2CNTRL(base));
+ break;
+ case G2INTST_CMDGOOD:
+ /* set immediate command success flag here: */
+ break;
+ case G2INTST_CMDERROR:
+ /* Set immediate command failure flag here: */
+ break;
+ }
+ number_serviced++;
+ }
+}
+
+int aha1740_queuecommand(Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *))
+{
+ unchar direction;
+ unchar *cmd = (unchar *) SCpnt->cmnd;
+ unchar target = SCpnt->target;
+ struct aha1740_hostdata *host = HOSTDATA(SCpnt->host);
+ unsigned long flags;
+ void *buff = SCpnt->request_buffer;
+ int bufflen = SCpnt->request_bufflen;
+ int ecbno;
+ DEB(int i);
+
+ if(*cmd == REQUEST_SENSE)
+ {
+ if (bufflen != sizeof(SCpnt->sense_buffer))
+ {
+ printk("Wrong buffer length supplied for request sense (%d)\n",
+ bufflen);
+ }
+ 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;
+ printk("aha1740_queuecommand: dev %d cmd %02x pos %d len %d ",
+ target, *cmd, i, bufflen);
+ printk("scsi cmd:");
+ for (i = 0; i < SCpnt->cmd_len; i++) printk("%02x ", cmd[i]);
+ printk("\n");
+#endif
+
+ /* locate an available ecb */
+ save_flags(flags);
+ cli();
+ ecbno = host->last_ecb_used + 1; /* An optimization */
+ if (ecbno >= AHA1740_ECBS)
+ ecbno = 0;
+ do {
+ if (!host->ecb[ecbno].cmdw)
+ break;
+ ecbno++;
+ if (ecbno >= AHA1740_ECBS)
+ ecbno = 0;
+ } while (ecbno != host->last_ecb_used);
+
+ if (host->ecb[ecbno].cmdw)
+ panic("Unable to find empty ecb for aha1740.\n");
+
+ host->ecb[ecbno].cmdw = AHA1740CMD_INIT; /* SCSI Initiator Command
+ doubles as reserved flag */
+
+ host->last_ecb_used = ecbno;
+ restore_flags(flags);
+
+#ifdef DEBUG
+ printk("Sending command (%d %x)...", ecbno, done);
+#endif
+
+ host->ecb[ecbno].cdblen = SCpnt->cmd_len; /* SCSI Command Descriptor Block Length */
+
+ direction = 0;
+ if (*cmd == READ_10 || *cmd == READ_6)
+ direction = 1;
+ else if (*cmd == WRITE_10 || *cmd == WRITE_6)
+ direction = 0;
+
+ memcpy(host->ecb[ecbno].cdb, cmd, SCpnt->cmd_len);
+
+ if (SCpnt->use_sg)
+ {
+ struct scatterlist * sgpnt;
+ struct aha1740_chain * cptr;
+ int i;
+ DEB(unsigned char * ptr);
+
+ host->ecb[ecbno].sg = 1; /* SCSI Initiator Command w/scatter-gather*/
+ SCpnt->host_scribble = (unsigned char *) scsi_malloc(512);
+ sgpnt = (struct scatterlist *) SCpnt->request_buffer;
+ cptr = (struct aha1740_chain *) SCpnt->host_scribble;
+ if (cptr == NULL) panic("aha1740.c: unable to allocate DMA memory\n");
+ for(i=0; i<SCpnt->use_sg; i++)
+ {
+ cptr[i].datalen = sgpnt[i].length;
+ cptr[i].dataptr = virt_to_bus(sgpnt[i].address);
+ }
+ host->ecb[ecbno].datalen = SCpnt->use_sg * sizeof(struct aha1740_chain);
+ host->ecb[ecbno].dataptr = virt_to_bus(cptr);
+#ifdef DEBUG
+ printk("cptr %x: ",cptr);
+ ptr = (unsigned char *) cptr;
+ for(i=0;i<24;i++) printk("%02x ", ptr[i]);
+#endif
+ }
+ else
+ {
+ SCpnt->host_scribble = NULL;
+ host->ecb[ecbno].datalen = bufflen;
+ host->ecb[ecbno].dataptr = virt_to_bus(buff);
+ }
+ host->ecb[ecbno].lun = SCpnt->lun;
+ host->ecb[ecbno].ses = 1; /* Suppress underrun errors */
+ host->ecb[ecbno].dir = direction;
+ host->ecb[ecbno].ars = 1; /* Yes, get the sense on an error */
+ host->ecb[ecbno].senselen = 12;
+ host->ecb[ecbno].senseptr = virt_to_bus(host->ecb[ecbno].sense);
+ host->ecb[ecbno].statusptr = virt_to_bus(host->ecb[ecbno].status);
+ host->ecb[ecbno].done = done;
+ host->ecb[ecbno].SCpnt = SCpnt;
+#ifdef DEBUG
+ {
+ int i;
+ printk("aha1740_command: sending.. ");
+ for (i = 0; i < sizeof(host->ecb[ecbno]) - 10; i++)
+ printk("%02x ", ((unchar *)&host->ecb[ecbno])[i]);
+ }
+ printk("\n");
+#endif
+ if (done)
+ { /* The Adaptec Spec says the card is so fast that the loops will
+ only be executed once in the code below. Even if this was true
+ with the fastest processors when the spec was written, it doesn't
+ seem to be true with todays fast processors. We print a warning
+ if the code is executed more often than LOOPCNT_WARN. If this
+ happens, it should be investigated. If the count reaches
+ LOOPCNT_MAX, we assume something is broken; since there is no
+ way to return an error (the return value is ignored by the
+ mid-level scsi layer) we have to panic (and maybe that's the
+ best thing we can do then anyhow). */
+
+#define LOOPCNT_WARN 10 /* excessive mbxout wait -> syslog-msg */
+#define LOOPCNT_MAX 1000000 /* mbxout deadlock -> panic() after ~ 2 sec. */
+ int loopcnt;
+ unsigned int base = SCpnt->host->io_port;
+ DEB(printk("aha1740[%d] critical section\n",ecbno));
+ save_flags(flags);
+ cli();
+ for (loopcnt = 0; ; loopcnt++) {
+ if (inb(G2STAT(base)) & G2STAT_MBXOUT) break;
+ if (loopcnt == LOOPCNT_WARN) {
+ printk("aha1740[%d]_mbxout wait!\n",ecbno);
+ cli(); /* printk may have done a sti()! */
+ }
+ if (loopcnt == LOOPCNT_MAX)
+ panic("aha1740.c: mbxout busy!\n");
+ }
+ outl(virt_to_bus(host->ecb + ecbno), MBOXOUT0(base));
+ for (loopcnt = 0; ; loopcnt++) {
+ if (! (inb(G2STAT(base)) & G2STAT_BUSY)) break;
+ if (loopcnt == LOOPCNT_WARN) {
+ printk("aha1740[%d]_attn wait!\n",ecbno);
+ cli();
+ }
+ if (loopcnt == LOOPCNT_MAX)
+ panic("aha1740.c: attn wait failed!\n");
+ }
+ outb(ATTN_START | (target & 7), ATTN(base)); /* Start it up */
+ restore_flags(flags);
+ DEB(printk("aha1740[%d] request queued.\n",ecbno));
+ }
+ else
+ printk(KERN_ALERT "aha1740_queuecommand: done can't be NULL\n");
+ return 0;
+}
+
+static void internal_done(Scsi_Cmnd * SCpnt)
+{
+ SCpnt->SCp.Status++;
+}
+
+int aha1740_command(Scsi_Cmnd * SCpnt)
+{
+ aha1740_queuecommand(SCpnt, internal_done);
+ SCpnt->SCp.Status = 0;
+ while (!SCpnt->SCp.Status)
+ barrier();
+ return SCpnt->result;
+}
+
+/* Query the board for its irq_level. Nothing else matters
+ in enhanced mode on an EISA bus. */
+
+void aha1740_getconfig(unsigned int base, unsigned int *irq_level,
+ unsigned int *translation)
+{
+ static int intab[] = { 9, 10, 11, 12, 0, 14, 15, 0 };
+
+ *irq_level = intab[inb(INTDEF(base)) & 0x7];
+ *translation = inb(RESV1(base)) & 0x1;
+ outb(inb(INTDEF(base)) | 0x10, INTDEF(base));
+}
+
+int aha1740_detect(Scsi_Host_Template * tpnt)
+{
+ int count = 0, slot;
+
+ DEB(printk("aha1740_detect: \n"));
+
+ for ( slot=MINEISA; slot <= MAXEISA; slot++ )
+ {
+ int slotbase;
+ unsigned int irq_level, translation;
+ struct Scsi_Host *shpnt;
+ struct aha1740_hostdata *host;
+ slotbase = SLOTBASE(slot);
+ /*
+ * The ioports for eisa boards are generally beyond that used in the
+ * check/allocate region code, but this may change at some point,
+ * so we go through the motions.
+ */
+ if (check_region(slotbase, SLOTSIZE)) /* See if in use */
+ continue;
+ if (!aha1740_test_port(slotbase))
+ continue;
+ aha1740_getconfig(slotbase,&irq_level,&translation);
+ if ((inb(G2STAT(slotbase)) &
+ (G2STAT_MBXOUT|G2STAT_BUSY)) != G2STAT_MBXOUT)
+ { /* If the card isn't ready, hard reset it */
+ outb(G2CNTRL_HRST, G2CNTRL(slotbase));
+ outb(0, G2CNTRL(slotbase));
+ }
+ printk("Configuring aha174x at IO:%x, IRQ %d\n", slotbase, irq_level);
+ printk("aha174x: Extended translation %sabled.\n",
+ translation ? "en" : "dis");
+ DEB(printk("aha1740_detect: enable interrupt channel %d\n",irq_level));
+ if (request_irq(irq_level,aha1740_intr_handle,0,"aha1740",NULL)) {
+ printk("Unable to allocate IRQ for adaptec controller.\n");
+ continue;
+ }
+ shpnt = scsi_register(tpnt, sizeof(struct aha1740_hostdata));
+ request_region(slotbase, SLOTSIZE, "aha1740");
+ shpnt->base = 0;
+ shpnt->io_port = slotbase;
+ shpnt->n_io_port = SLOTSIZE;
+ shpnt->irq = irq_level;
+ shpnt->dma_channel = 0xff;
+ host = HOSTDATA(shpnt);
+ host->slot = slot;
+ host->translation = translation;
+ aha_host[irq_level - 9] = shpnt;
+ count++;
+ }
+ return count;
+}
+
+/* Note: They following two functions do not apply very well to the Adaptec,
+ which basically manages its own affairs quite well without our interference,
+ so I haven't put anything into them. I can faintly imagine someone with a
+ *very* badly behaved SCSI target (perhaps an old tape?) wanting the abort(),
+ but it hasn't happened yet, and doing aborts brings the Adaptec to its
+ knees. I cannot (at this moment in time) think of any reason to reset the
+ card once it's running. So there. */
+
+int aha1740_abort(Scsi_Cmnd * SCpnt)
+{
+ DEB(printk("aha1740_abort called\n"));
+ 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 */
+
+int aha1740_reset(Scsi_Cmnd * SCpnt, unsigned int ignored)
+{
+ DEB(printk("aha1740_reset called\n"));
+ return SCSI_RESET_PUNT;
+}
+
+int aha1740_biosparam(Disk * disk, kdev_t dev, int* ip)
+{
+ int size = disk->capacity;
+ int extended = HOSTDATA(disk->device->host)->translation;
+
+ DEB(printk("aha1740_biosparam\n"));
+ if (extended && (ip[2] > 1024))
+ {
+ 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 = AHA1740;
+
+#include "scsi_module.c"
+#endif
+
+/* Okay, you made it all the way through. As of this writing, 3/31/93, I'm
+brad@saturn.gaylord.com or brad@bradpc.gaylord.com. I'll try to help as time
+permits if you have any trouble with this driver. Happy Linuxing! */
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-30 21:30:46 +0000