| /* $Id$ |
| * 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 |
| * |
| * aha1740_makecode may still need even more work |
| * if it doesn't work for your devices, take a look. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/head.h> |
| #include <linux/types.h> |
| #include <linux/string.h> |
| |
| #include <linux/sched.h> |
| #include <asm/dma.h> |
| |
| #include <asm/system.h> |
| #include <asm/io.h> |
| #include "../blk.h" |
| #include "scsi.h" |
| #include "hosts.h" |
| |
| #include "aha1740.h" |
| |
| /* 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: /usr/src/linux/kernel/blk_drv/scsi/RCS/aha1740.c,v 1.1 1992/07/24 06:27:38 root Exp root $"; |
| */ |
| |
| static unsigned int slot, base; |
| static unsigned char irq_level; |
| |
| static struct ecb ecb[AHA1740_ECBS]; /* One for each queued operation */ |
| |
| static int aha1740_last_ecb_used = 0; /* optimization */ |
| |
| 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 futher 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 found 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(void) |
| { |
| char name[4],tmp; |
| |
| /* Okay, look for the EISA ID's */ |
| name[0]= 'A' -1 + ((tmp = inb(HID0)) >> 2); /* First character */ |
| name[1]= 'A' -1 + ((tmp & 3) << 3); |
| name[1]+= ((tmp = inb(HID1)) >> 5)&0x7; /* Second Character */ |
| name[2]= 'A' -1 + (tmp & 0x1f); /* Third Character */ |
| name[3]=0; |
| tmp = inb(HID2); |
| if ( strcmp ( name, HID_MFG ) || inb(HID2) != HID_PRD ) |
| return 0; /* Not an Adaptec 174x */ |
| |
| /* if ( inb(HID3) != HID_REV ) |
| printk("aha1740: Warning; board revision of %d; expected %d\n", |
| inb(HID3),HID_REV); */ |
| |
| if ( inb(EBCNTRL) != EBCNTRL_VALUE ) |
| { |
| printk("aha1740: Board detected, but EBCNTRL = %x, so disabled it.\n", |
| inb(EBCNTRL)); |
| return 0; |
| } |
| |
| if ( inb(PORTADR) & PORTADDR_ENH ) |
| return 1; /* Okay, we're all set */ |
| |
| printk("aha1740: Board detected, but not in enhanced mode, so disabled it.\n"); |
| return 0; |
| } |
| |
| const char *aha1740_info(void) |
| { |
| static char buffer[] = "Adaptec 174x (EISA)"; |
| return buffer; |
| } |
| |
| /* A "high" level interrupt handler */ |
| void aha1740_intr_handle(int foo) |
| { |
| void (*my_done)(Scsi_Cmnd *); |
| int errstatus, adapstat; |
| int number_serviced; |
| struct ecb *ecbptr; |
| Scsi_Cmnd *SCtmp; |
| |
| number_serviced = 0; |
| |
| while(inb(G2STAT) & G2STAT_INTPEND) |
| { |
| DEB(printk("aha1740_intr top of loop.\n")); |
| adapstat = inb(G2INTST); |
| outb(G2CNTRL_IRST,G2CNTRL); /* interrupt reset */ |
| |
| switch ( adapstat & G2INTST_MASK ) |
| { |
| case G2INTST_CCBRETRY: |
| case G2INTST_CCBERROR: |
| case G2INTST_CCBGOOD: |
| ecbptr = (struct ecb *) ( ((ulong) inb(MBOXIN0)) + |
| ((ulong) inb(MBOXIN1) <<8) + |
| ((ulong) inb(MBOXIN2) <<16) + |
| ((ulong) inb(MBOXIN3) <<24) ); |
| outb(G2CNTRL_HRDY,G2CNTRL); /* Host Ready -> Mailbox in complete */ |
| SCtmp = ecbptr->SCpnt; |
| 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("aha1740 hardware failure!\n"); |
| panic("aha1740.c"); /* Goodbye */ |
| case G2INTST_ASNEVENT: |
| printk("aha1740 asynchronous event: %02x %02x %02x %02x %02x\n",adapstat, |
| inb(MBOXIN0),inb(MBOXIN1),inb(MBOXIN2),inb(MBOXIN3)); /* Say What? */ |
| outb(G2CNTRL_HRDY,G2CNTRL); /* Host Ready -> Mailbox in complete */ |
| 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; |
| 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); |
| panic("aha1740.c"); |
| } |
| 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 < (COMMAND_SIZE(*cmd)); i++) printk("%02x ", cmd[i]); |
| printk("\n"); |
| #endif |
| |
| /* locate an available ecb */ |
| |
| cli(); |
| ecbno = aha1740_last_ecb_used + 1; /* An optimization */ |
| if (ecbno >= AHA1740_ECBS) ecbno = 0; |
| |
| do{ |
| if( ! ecb[ecbno].cmdw ) |
| break; |
| ecbno++; |
| if (ecbno >= AHA1740_ECBS ) ecbno = 0; |
| } while (ecbno != aha1740_last_ecb_used); |
| |
| if( ecb[ecbno].cmdw ) |
| panic("Unable to find empty ecb for aha1740.\n"); |
| |
| ecb[ecbno].cmdw = AHA1740CMD_INIT; /* SCSI Initiator Command doubles as reserved flag */ |
| |
| aha1740_last_ecb_used = ecbno; |
| sti(); |
| |
| #ifdef DEBUG |
| printk("Sending command (%d %x)...",ecbno, done); |
| #endif |
| |
| ecb[ecbno].cdblen = COMMAND_SIZE(*cmd); /* 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(ecb[ecbno].cdb, cmd, ecb[ecbno].cdblen); |
| |
| if (SCpnt->use_sg) |
| { |
| struct scatterlist * sgpnt; |
| struct aha1740_chain * cptr; |
| int i; |
| #ifdef DEBUG |
| unsigned char * ptr; |
| #endif |
| 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].dataptr = (long) sgpnt[i].address; |
| cptr[i].datalen = sgpnt[i].length; |
| } |
| ecb[ecbno].datalen = SCpnt->use_sg * sizeof(struct aha1740_chain); |
| ecb[ecbno].dataptr = (long) 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; |
| ecb[ecbno].datalen = bufflen; |
| ecb[ecbno].dataptr = (long) buff; |
| } |
| ecb[ecbno].lun = SCpnt->lun; |
| ecb[ecbno].ses = 1; /* Suppress underrun errors */ |
| ecb[ecbno].dir= direction; |
| ecb[ecbno].ars=1; /* Yes, get the sense on an error */ |
| ecb[ecbno].senselen = 12; |
| ecb[ecbno].senseptr = (long) ecb[ecbno].sense; |
| ecb[ecbno].statusptr = (long) ecb[ecbno].status; |
| ecb[ecbno].done = done; |
| ecb[ecbno].SCpnt = SCpnt; |
| #ifdef DEBUG |
| { |
| int i; |
| printk("aha1740_command: sending.. "); |
| for (i = 0; i < sizeof(ecb[ecbno])-10; i++) |
| printk("%02x ", ((unchar *)&ecb[ecbno])[i]); |
| } |
| printk("\n"); |
| #endif |
| if (done) |
| { /* You may question the code below, which contains potentially |
| non-terminating while loops with interrupts disabled. So did |
| I when I wrote it, but the Adaptec Spec says the card is so fast, |
| that this problem virtually never occurs so I've kept it. We |
| do printk a warning first, so that you'll know if it happens. |
| In practive the only time we've seen this message is when some- |
| thing else is in the driver was broken, like _makecode(), or |
| when a scsi device hung the scsi bus. Even under these conditions, |
| The loop actually only cycled < 3 times (we instrumented it). */ |
| ulong adrs; |
| |
| DEB(printk("aha1740[%d] critical section\n",ecbno)); |
| cli(); |
| if ( ! (inb(G2STAT) & G2STAT_MBXOUT) ) |
| { |
| printk("aha1740[%d]_mbxout wait!\n",ecbno); |
| cli(); /* printk may have done a sti()! */ |
| } |
| while ( ! (inb(G2STAT) & G2STAT_MBXOUT) ); /* Oh Well. */ |
| adrs = (ulong) &(ecb[ecbno]); /* Spit the command */ |
| outb((char) (adrs&0xff), MBOXOUT0); /* out, note this set */ |
| outb((char) ((adrs>>8)&0xff), MBOXOUT1); /* of outb's must be */ |
| outb((char) ((adrs>>16)&0xff), MBOXOUT2); /* atomic */ |
| outb((char) ((adrs>>24)&0xff), MBOXOUT3); |
| if ( inb(G2STAT) & G2STAT_BUSY ) |
| { |
| printk("aha1740[%d]_attn wait!\n",ecbno); |
| cli(); |
| } |
| while ( inb(G2STAT) & G2STAT_BUSY ); /* And Again! */ |
| outb(ATTN_START | (target & 7), ATTN); /* Start it up */ |
| sti(); |
| DEB(printk("aha1740[%d] request queued.\n",ecbno)); |
| } |
| else |
| printk("aha1740_queuecommand: done can't be NULL\n"); |
| |
| return 0; |
| } |
| |
| static volatile int internal_done_flag = 0; |
| static volatile int internal_done_errcode = 0; |
| |
| static void internal_done(Scsi_Cmnd * SCpnt) |
| { |
| internal_done_errcode = SCpnt->result; |
| ++internal_done_flag; |
| } |
| |
| int aha1740_command(Scsi_Cmnd * SCpnt) |
| { |
| aha1740_queuecommand(SCpnt, internal_done); |
| |
| while (!internal_done_flag); |
| internal_done_flag = 0; |
| return internal_done_errcode; |
| } |
| |
| /* Query the board for it's irq_level. Nothing else matters |
| in enhanced mode on an EISA bus. */ |
| |
| void aha1740_getconfig(void) |
| { |
| static int intab[] = { 9,10,11,12,0,14,15,0 }; |
| |
| irq_level = intab [ inb(INTDEF)&0x7 ]; |
| } |
| |
| int aha1740_detect(int hostnum) |
| { |
| memset(&ecb, 0, sizeof(struct ecb)); |
| DEB(printk("aha1740_detect: \n")); |
| |
| for ( slot=MINEISA; slot <= MAXEISA; slot++ ) |
| { |
| base = SLOTBASE(slot); |
| if ( aha1740_test_port()) break; |
| } |
| if ( slot > MAXEISA ) |
| return 0; |
| |
| aha1740_getconfig(); |
| |
| if ( (inb(G2STAT) & (G2STAT_MBXOUT | G2STAT_BUSY) ) != G2STAT_MBXOUT ) |
| { /* If the card isn't ready, hard reset it */ |
| outb(G2CNTRL_HRST,G2CNTRL); |
| outb(0,G2CNTRL); |
| } |
| |
| printk("Configuring Adaptec at IO:%x, IRQ %d\n",base, |
| irq_level); |
| |
| DEB(printk("aha1740_detect: enable interrupt channel %d\n", irq_level)); |
| |
| if (request_irq(irq_level,aha1740_intr_handle)) |
| { |
| printk("Unable to allocate IRQ for adaptec controller.\n"); |
| return 0; |
| } |
| return 1; |
| } |
| |
| /* Note: They following two functions do not apply very well to the Adaptec, |
| which basically manages it's 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 it's |
| 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, int i) |
| { |
| DEB(printk("aha1740_abort called\n")); |
| return 0; |
| } |
| |
| int aha1740_reset(void) |
| { |
| DEB(printk("aha1740_reset called\n")); |
| return 0; |
| } |
| |
| int aha1740_biosparam(int size, int dev, int* ip) |
| { |
| DEB(printk("aha1740_biosparam\n")); |
| ip[0] = 64; |
| ip[1] = 32; |
| ip[2] = size >> 11; |
| /* if (ip[2] >= 1024) ip[2] = 1024; */ |
| return 0; |
| } |
| |
| /* 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! */ |