Ok. I didn't make 2.4.0 in 2000. Tough. I tried, but we had some

[davej-history.git] / drivers / scsi / tmscsim.c

/***********************************************************************
 *      FILE NAME : TMSCSIM.C                                          *
 *           BY   : C.L. Huang,  ching@tekram.com.tw                   *
 *      Description: Device Driver for Tekram DC-390(T) PCI SCSI       *
 *                   Bus Master Host Adapter                           *
 * (C)Copyright 1995-1996 Tekram Technology Co., Ltd.                  *
 ***********************************************************************/
/* (C) Copyright: put under GNU GPL in 10/96  (see README.tmscsim)      *
*************************************************************************/
/* $Id: tmscsim.c,v 2.60.2.30 2000/12/20 01:07:12 garloff Exp $         */
/*      Enhancements and bugfixes by                                    *
 *      Kurt Garloff <kurt@garloff.de>  <garloff@suse.de>               *
 ***********************************************************************/
/*      HISTORY:                                                        *
 *                                                                      *
 *      REV#    DATE    NAME    DESCRIPTION                             *
 *      1.00  96/04/24  CLH     First release                           *
 *      1.01  96/06/12  CLH     Fixed bug of Media Change for Removable *
 *                              Device, scan all LUN. Support Pre2.0.10 *
 *      1.02  96/06/18  CLH     Fixed bug of Command timeout ...        *
 *      1.03  96/09/25  KG      Added tmscsim_proc_info()               *
 *      1.04  96/10/11  CLH     Updating for support KV 2.0.x           *
 *      1.05  96/10/18  KG      Fixed bug in DC390_abort(null ptr deref)*
 *      1.06  96/10/25  KG      Fixed module support                    *
 *      1.07  96/11/09  KG      Fixed tmscsim_proc_info()               *
 *      1.08  96/11/18  KG      Fixed null ptr in DC390_Disconnect()    *
 *      1.09  96/11/30  KG      Added register the allocated IO space   *
 *      1.10  96/12/05  CLH     Modified tmscsim_proc_info(), and reset *
 *                              pending interrupt in DC390_detect()     *
 *      1.11  97/02/05  KG/CLH  Fixeds problem with partitions greater  *
 *                              than 1GB                                *
 *      1.12  98/02/15  MJ      Rewritten PCI probing                   *
 *      1.13  98/04/08  KG      Support for non DC390, __initfunc decls,*
 *                              changed max devs from 10 to 16          *
 *      1.14a 98/05/05  KG      Dynamic DCB allocation, add-single-dev  *
 *                              for LUNs if LUN_SCAN (BIOS) not set     *
 *                              runtime config using /proc interface    *
 *      1.14b 98/05/06  KG      eliminated cli (); sti (); spinlocks    *
 *      1.14c 98/05/07  KG      2.0.x compatibility                     *
 *      1.20a 98/05/07  KG      changed names of funcs to be consistent *
 *                              DC390_ (entry points), dc390_ (internal)*
 *                              reworked locking                        *
 *      1.20b 98/05/12  KG      bugs: version, kfree, _ctmp             *
 *                              debug output                            *
 *      1.20c 98/05/12  KG      bugs: kfree, parsing, EEpromDefaults    *
 *      1.20d 98/05/14  KG      bugs: list linkage, clear flag after    *
 *                              reset on startup, code cleanup          *
 *      1.20e 98/05/15  KG      spinlock comments, name space cleanup   *
 *                              pLastDCB now part of ACB structure      *
 *                              added stats, timeout for 2.1, TagQ bug  *
 *                              RESET and INQUIRY interface commands    *
 *      1.20f 98/05/18  KG      spinlocks fixes, max_lun fix, free DCBs *
 *                              for missing LUNs, pending int           *
 *      1.20g 98/05/19  KG      Clean up: Avoid short                   *
 *      1.20h 98/05/21  KG      Remove AdaptSCSIID, max_lun ...         *
 *      1.20i 98/05/21  KG      Aiiie: Bug with TagQMask                *
 *      1.20j 98/05/24  KG      Handle STAT_BUSY, handle pACB->pLinkDCB *
 *                              == 0 in remove_dev and DoingSRB_Done    *
 *      1.20k 98/05/25  KG      DMA_INT (experimental)                  *
 *      1.20l 98/05/27  KG      remove DMA_INT; DMA_IDLE cmds added;    *
 *      1.20m 98/06/10  KG      glitch configurable; made some global   *
 *                              vars part of ACB; use DC390_readX       *
 *      1.20n 98/06/11  KG      startup params                          *
 *      1.20o 98/06/15  KG      added TagMaxNum to boot/module params   *
 *                              Device Nr -> Idx, TagMaxNum power of 2  *
 *      1.20p 98/06/17  KG      Docu updates. Reset depends on settings *
 *                              pci_set_master added; 2.0.xx: pcibios_* *
 *                              used instead of MechNum things ...      *
 *      1.20q 98/06/23  KG      Changed defaults. Added debug code for  *
 *                              removable media and fixed it. TagMaxNum *
 *                              fixed for DC390. Locking: ACB, DRV for  *
 *                              better IRQ sharing. Spelling: Queueing  *
 *                              Parsing and glitch_cfg changes. Display *
 *                              real SyncSpeed value. Made DisConn      *
 *                              functional (!)                          *
 *      1.20r 98/06/30  KG      Debug macros, allow disabling DsCn, set *
 *                              BIT4 in CtrlR4, EN_PAGE_INT, 2.0 module *
 *                              param -1 fixed.                         *
 *      1.20s 98/08/20  KG      Debug info on abort(), try to check PCI,*
 *                              phys_to_bus instead of phys_to_virt,    *
 *                              fixed sel. process, fixed locking,      *
 *                              added MODULE_XXX infos, changed IRQ     *
 *                              request flags, disable DMA_INT          *
 *      1.20t 98/09/07  KG      TagQ report fixed; Write Erase DMA Stat;*
 *                              initfunc -> __init; better abort;       *
 *                              Timeout for XFER_DONE & BLAST_COMPLETE; *
 *                              Allow up to 33 commands being processed *
 *      2.0a  98/10/14  KG      Max Cmnds back to 17. DMA_Stat clearing *
 *                              all flags. Clear within while() loops   *
 *                              in DataIn_0/Out_0. Null ptr in dumpinfo *
 *                              for pSRB==0. Better locking during init.*
 *                              bios_param() now respects part. table.  *
 *      2.0b  98/10/24  KG      Docu fixes. Timeout Msg in DMA Blast.   *
 *                              Disallow illegal idx in INQUIRY/REMOVE  *
 *      2.0c  98/11/19  KG      Cleaned up detect/init for SMP boxes,   *
 *                              Write Erase DMA (1.20t) caused problems *
 *      2.0d  98/12/25  KG      Christmas release ;-) Message handling  *
 *                              completely reworked. Handle target ini- *
 *                              tiated SDTR correctly.                  *
 *      2.0d1 99/01/25  KG      Try to handle RESTORE_PTR               *
 *      2.0d2 99/02/08  KG      Check for failure of kmalloc, correct   *
 *                              inclusion of scsicam.h, DelayReset      *
 *      2.0d3 99/05/31  KG      DRIVER_OK -> DID_OK, DID_NO_CONNECT,    *
 *                              detect Target mode and warn.            *
 *                              pcmd->result handling cleaned up.       *
 *      2.0d4 99/06/01  KG      Cleaned selection process. Found bug    *
 *                              which prevented more than 16 tags. Now: *
 *                              24. SDTR cleanup. Cleaner multi-LUN     *
 *                              handling. Don't modify ControlRegs/FIFO *
 *                              when connected.                         *
 *      2.0d5 99/06/01  KG      Clear DevID, Fix INQUIRY after cfg chg. *
 *      2.0d6 99/06/02  KG      Added ADD special command to allow cfg. *
 *                              before detection. Reset SYNC_NEGO_DONE  *
 *                              after a bus reset.                      *
 *      2.0d7 99/06/03  KG      Fixed bugs wrt add,remove commands      *
 *      2.0d8 99/06/04  KG      Removed copying of cmnd into CmdBlock.  *
 *                              Fixed Oops in _release().               *
 *      2.0d9 99/06/06  KG      Also tag queue INQUIRY, T_U_R, ...      *
 *                              Allow arb. no. of Tagged Cmnds. Max 32  *
 *      2.0d1099/06/20  KG      TagMaxNo changes now honoured! Queueing *
 *                              clearified (renamed ..) TagMask handling*
 *                              cleaned.                                *
 *      2.0d1199/06/28  KG      cmd->result now identical to 2.0d2      *
 *      2.0d1299/07/04  KG      Changed order of processing in IRQ      *
 *      2.0d1399/07/05  KG      Don't update DCB fields if removed      *
 *      2.0d1499/07/05  KG      remove_dev: Move kfree() to the end     *
 *      2.0d1599/07/12  KG      use_new_eh_code: 0, ULONG -> UINT where *
 *                              appropriate                             *
 *      2.0d1699/07/13  KG      Reenable StartSCSI interrupt, Retry msg *
 *      2.0d1799/07/15  KG      Remove debug msg. Disable recfg. when   *
 *                              there are queued cmnds                  *
 *      2.0d1899/07/18  KG      Selection timeout: Don't requeue        *
 *      2.0d1999/07/18  KG      Abort: Only call scsi_done if dequeued  *
 *      2.0d2099/07/19  KG      Rst_Detect: DoingSRB_Done               *
 *      2.0d2199/08/15  KG      dev_id for request/free_irq, cmnd[0] for*
 *                              RETRY, SRBdone does DID_ABORT for the   *
 *                              cmd passed by DC390_reset()             *
 *      2.0d2299/08/25  KG      dev_id fixed. can_queue: 42             *
 *      2.0d2399/08/25  KG      Removed some debugging code. dev_id     *
 *                              now is set to pACB. Use u8,u16,u32.     *
 *      2.0d2499/11/14  KG      Unreg. I/O if failed IRQ alloc. Call    *
 *                              done () w/ DID_BAD_TARGET in case of    *
 *                              missing DCB. We are old EH!!            *
 *      2.0d2500/01/15  KG      2.3.3x compat from Andreas Schultz      *
 *                              set unique_id. Disable RETRY message.   *
 *      2.0d2600/01/29  KG      Go to new EH.                           *
 *      2.0d2700/01/31  KG      ... but maintain 2.0 compat.            *
 *                              and fix DCB freeing                     *
 *      2.0d2800/02/14  KG      Queue statistics fixed, dump special cmd*
 *                              Waiting_Timer for failed StartSCSI      *
 *                              New EH: Don't return cmnds to ML on RST *
 *                              Use old EH (don't have new EH fns yet)  *
 *                              Reset: Unlock, but refuse to queue      *
 *                              2.3 __setup function                    *
 *      2.0e  00/05/22  KG      Return residual for 2.3                 *
 *      2.0e1 00/05/25  KG      Compile fixes for 2.3.99                *
 *      2.0e2 00/05/27  KG      Jeff Garzik's pci_enable_device()       *
 *      2.0e3 00/09/29  KG      Some 2.4 changes. Don't try Sync Nego   *
 *                              before INQUIRY has reported ability.    *
 *                              Recognise INQUIRY as scanning command.  *
 *      2.0e4 00/10/13  KG      Allow compilation into 2.4 kernel       *
 *      2.0e5 00/11/17  KG      Store Inq.flags in DCB                  *
 *      2.0e6 00/11/22  KG      2.4 init function (Thx to O.Schumann)   *
 *                              2.4 PCI device table (Thx to A.Richter) *
 *      2.0e7 00/11/28  KG      Allow overriding of BIOS settings       *
 *      2.0f  00/12/20  KG      Handle failed INQUIRYs during scan      *
 ***********************************************************************/

/* Uncomment SA_INTERRUPT, if the driver refuses to share its IRQ with other devices */
#define DC390_IRQ SA_SHIRQ /* | SA_INTERRUPT */

/* DEBUG options */
//#define DC390_DEBUG0
//#define DC390_DEBUG1
//#define DC390_DCBDEBUG
//#define DC390_PARSEDEBUG
//#define DC390_REMOVABLEDEBUG
//#define DC390_LOCKDEBUG

/* Debug definitions */
#ifdef DC390_DEBUG0
# define DEBUG0(x) x;
#else
# define DEBUG0(x)
#endif
#ifdef DC390_DEBUG1
# define DEBUG1(x) x;
#else
# define DEBUG1(x)
#endif
#ifdef DC390_DCBDEBUG
# define DCBDEBUG(x) x;
#else
# define DCBDEBUG(x)
#endif
#ifdef DC390_PARSEDEBUG
# define PARSEDEBUG(x) x;
#else
# define PARSEDEBUG(x)
#endif
#ifdef DC390_REMOVABLEDEBUG
# define REMOVABLEDEBUG(x) x;
#else
# define REMOVABLEDEBUG(x)
#endif
#define DCBDEBUG1(x)

/* Includes */
#ifdef MODULE
# include <linux/module.h>
#endif

#include <asm/dma.h>
#include <asm/io.h>
#include <asm/system.h>
#include <linux/delay.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/mm.h>
#include <linux/config.h>
#include <linux/version.h>
#include <linux/blk.h>
#include <linux/timer.h>

#include "scsi.h"
#include "hosts.h"
#include "constants.h"
#include "sd.h"
#include <linux/stat.h>
#include <scsi/scsicam.h>

#include "dc390.h"

#define PCI_DEVICE_ID_AMD53C974         PCI_DEVICE_ID_AMD_SCSI

/* Locking */

/* Note: Starting from 2.1.9x, the mid-level scsi code issues a 
 * spinlock_irqsave (&io_request_lock) before calling the driver's 
 * routines, so we don't need to lock, except in the IRQ handler.
 * The policy 3, let the midlevel scsi code do the io_request_locks
 * and us locking on a driver specific lock, shouldn't hurt anybody; it
 * just causes a minor performance degradation for setting the locks.
 */

/* spinlock things
 * level 3: lock on both adapter specific locks and (global) io_request_lock
 * level 2: lock on adapter specific locks only
 * level 1: rely on the locking of the mid level code (io_request_lock)
 * undef  : traditional save_flags; cli; restore_flags;
 */

//#define DEBUG_SPINLOCKS 2     /* Set to 0, 1 or 2 in include/linux/spinlock.h */

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,30)
# include <linux/init.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,30)
# include <linux/spinlock.h>
#else
# include <asm/spinlock.h>
#endif
#endif


#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,93) 
# define USE_SPINLOCKS 1
# define NEW_PCI 1
#else
# undef NEW_PCI
# if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,30)
#  define USE_SPINLOCKS 2
# endif
#endif

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,99)
static struct pci_device_id tmscsim_pci_tbl[] __initdata = {
        {
                vendor: PCI_VENDOR_ID_AMD,
                device: PCI_DEVICE_ID_AMD53C974,
                subvendor: PCI_ANY_ID,
                subdevice: PCI_ANY_ID,
        },
        { }             /* Terminating entry */
};
MODULE_DEVICE_TABLE(pci, tmscsim_pci_tbl);
#endif
        
#ifdef USE_SPINLOCKS

# if USE_SPINLOCKS == 3 /* both */

#  if defined (CONFIG_SMP) || DEBUG_SPINLOCKS > 0
#   define DC390_LOCKA_INIT { spinlock_t __unlocked = SPIN_LOCK_UNLOCKED; pACB->lock = __unlocked; };
#  else
#   define DC390_LOCKA_INIT
#  endif
   spinlock_t dc390_drvlock = SPIN_LOCK_UNLOCKED;

#  define DC390_AFLAGS unsigned long aflags;
#  define DC390_IFLAGS unsigned long iflags;
#  define DC390_DFLAGS unsigned long dflags; 

#  define DC390_LOCK_IO spin_lock_irqsave (&io_request_lock, iflags)
#  define DC390_UNLOCK_IO spin_unlock_irqrestore (&io_request_lock, iflags)

#  define DC390_LOCK_DRV spin_lock_irqsave (&dc390_drvlock, dflags)
#  define DC390_UNLOCK_DRV spin_unlock_irqrestore (&dc390_drvlock, dflags)
#  define DC390_LOCK_DRV_NI spin_lock (&dc390_drvlock)
#  define DC390_UNLOCK_DRV_NI spin_unlock (&dc390_drvlock)

#  define DC390_LOCK_ACB spin_lock_irqsave (&(pACB->lock), aflags)
#  define DC390_UNLOCK_ACB spin_unlock_irqrestore (&(pACB->lock), aflags)
#  define DC390_LOCK_ACB_NI spin_lock (&(pACB->lock))
#  define DC390_UNLOCK_ACB_NI spin_unlock (&(pACB->lock))
//#  define DC390_LOCKA_INIT spin_lock_init (&(pACB->lock))

# else

#  if USE_SPINLOCKS == 2 /* adapter specific locks */

#   if defined (__SMP__) || DEBUG_SPINLOCKS > 0
#    define DC390_LOCKA_INIT { spinlock_t __unlocked = SPIN_LOCK_UNLOCKED; pACB->lock = __unlocked; };
#   else
#    define DC390_LOCKA_INIT
#   endif
    spinlock_t dc390_drvlock = SPIN_LOCK_UNLOCKED;
#   define DC390_AFLAGS unsigned long aflags;
#   define DC390_IFLAGS 
#  define DC390_DFLAGS unsigned long dflags; 
#   define DC390_LOCK_IO /* spin_lock_irqsave (&io_request_lock, iflags) */
#   define DC390_UNLOCK_IO /* spin_unlock_irqrestore (&io_request_lock, iflags) */
#   define DC390_LOCK_DRV spin_lock_irqsave (&dc390_drvlock, dflags)
#   define DC390_UNLOCK_DRV spin_unlock_irqrestore (&dc390_drvlock, dflags)
#   define DC390_LOCK_DRV_NI spin_lock (&dc390_drvlock)
#   define DC390_UNLOCK_DRV_NI spin_unlock (&dc390_drvlock)
#   define DC390_LOCK_ACB spin_lock_irqsave (&(pACB->lock), aflags)
#   define DC390_UNLOCK_ACB spin_unlock_irqrestore (&(pACB->lock), aflags)
#   define DC390_LOCK_ACB_NI spin_lock (&(pACB->lock))
#   define DC390_UNLOCK_ACB_NI spin_unlock (&(pACB->lock))
//#   define DC390_LOCKA_INIT spin_lock_init (&(pACB->lock))

#  else /* USE_SPINLOCKS == 1: global lock io_request_lock */

#   define DC390_AFLAGS 
#   define DC390_IFLAGS unsigned long iflags;
#   define DC390_DFLAGS unsigned long dflags; 
    spinlock_t dc390_drvlock = SPIN_LOCK_UNLOCKED;
#   define DC390_LOCK_IO spin_lock_irqsave (&io_request_lock, iflags)
#   define DC390_UNLOCK_IO spin_unlock_irqrestore (&io_request_lock, iflags)
#   define DC390_LOCK_DRV spin_lock_irqsave (&dc390_drvlock, dflags)
#   define DC390_UNLOCK_DRV spin_unlock_irqrestore (&dc390_drvlock, dflags)
#   define DC390_LOCK_DRV_NI spin_lock (&dc390_drvlock)
#   define DC390_UNLOCK_DRV_NI spin_unlock (&dc390_drvlock)
#   define DC390_LOCK_ACB /* DC390_LOCK_IO */
#   define DC390_UNLOCK_ACB /* DC390_UNLOCK_IO */
#   define DC390_LOCK_ACB_NI /* spin_lock (&(pACB->lock)) */
#   define DC390_UNLOCK_ACB_NI /* spin_unlock (&(pACB->lock)) */
#   define DC390_LOCKA_INIT /* DC390_LOCKA_INIT */

#  endif /* 2 */
# endif /* 3 */

#else /* USE_SPINLOCKS undefined */

# define DC390_AFLAGS unsigned long aflags;
# define DC390_IFLAGS unsigned long iflags;
# define DC390_DFLAGS unsigned long dflags; 
# define DC390_LOCK_IO save_flags (iflags); cli ()
# define DC390_UNLOCK_IO restore_flags (iflags)
# define DC390_LOCK_DRV save_flags (dflags); cli ()
# define DC390_UNLOCK_DRV restore_flags (dflags)
# define DC390_LOCK_DRV_NI
# define DC390_UNLOCK_DRV_NI
# define DC390_LOCK_ACB save_flags (aflags); cli ()
# define DC390_UNLOCK_ACB restore_flags (aflags)
# define DC390_LOCK_ACB_NI
# define DC390_UNLOCK_ACB_NI
# define DC390_LOCKA_INIT
#endif /* def */


/* These macros are used for uniform access to 2.0.x and 2.1.x PCI config space*/

#ifdef NEW_PCI
# define PDEV pdev
# define PDEVDECL struct pci_dev *pdev
# define PDEVDECL0 struct pci_dev *pdev = NULL
# define PDEVDECL1 struct pci_dev *pdev
# define PDEVSET pACB->pdev=pdev
# define PDEVSET1 pdev=pACB->pdev
# define PCI_WRITE_CONFIG_BYTE(pd, rv, bv) pci_write_config_byte (pd, rv, bv)
# define PCI_READ_CONFIG_BYTE(pd, rv, bv) pci_read_config_byte (pd, rv, bv)
# define PCI_WRITE_CONFIG_WORD(pd, rv, bv) pci_write_config_word (pd, rv, bv)
# define PCI_READ_CONFIG_WORD(pd, rv, bv) pci_read_config_word (pd, rv, bv)
# define PCI_BUS_DEV pdev->bus->number, pdev->devfn
# define PCI_PRESENT pci_present ()
# define PCI_SET_MASTER pci_set_master (pdev)
# define PCI_FIND_DEVICE(vend, id) (pdev = pci_find_device (vend, id, pdev))
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,10)
# define PCI_GET_IO_AND_IRQ io_port = pci_resource_start (pdev, 0); irq = pdev->irq
#else
# define PCI_GET_IO_AND_IRQ io_port = pdev->base_address[0] & PCI_BASE_ADDRESS_IO_MASK; irq = pdev->irq
#endif
#else
# include <linux/bios32.h>
# define PDEV pbus, pdevfn
# define PDEVDECL UCHAR pbus, UCHAR pdevfn
# define PDEVDECL0 UCHAR pbus = 0; UCHAR pdevfn = 0; USHORT pci_index = 0; int error
# define PDEVDECL1 UCHAR pbus; UCHAR pdevfn /*; USHORT pci_index */
# define PDEVSET pACB->pbus=pbus; pACB->pdevfn=pdevfn /*; pACB->pci_index=pci_index */
# define PDEVSET1 pbus=pACB->pbus; pdevfn=pACB->pdevfn /*; pci_index=pACB->pci_index */
# define PCI_WRITE_CONFIG_BYTE(pd, rv, bv) pcibios_write_config_byte (pd, rv, bv)
# define PCI_READ_CONFIG_BYTE(pd, rv, bv) pcibios_read_config_byte (pd, rv, bv)
# define PCI_WRITE_CONFIG_WORD(pd, rv, bv) pcibios_write_config_word (pd, rv, bv)
# define PCI_READ_CONFIG_WORD(pd, rv, bv) pcibios_read_config_word (pd, rv, bv)
# define PCI_BUS_DEV pbus, pdevfn
# define PCI_PRESENT pcibios_present ()
# define PCI_SET_MASTER dc390_set_master (pbus, pdevfn)
# define PCI_FIND_DEVICE(vend, id) (!pcibios_find_device (vend, id, pci_index++, &pbus, &pdevfn))
# define PCI_GET_IO_AND_IRQ error = pcibios_read_config_dword (pbus, pdevfn, PCI_BASE_ADDRESS_0, &io_port);     \
 error |= pcibios_read_config_byte (pbus, pdevfn, PCI_INTERRUPT_LINE, &irq);    \
 io_port &= 0xfffe;     \
 if (error) { printk (KERN_ERR "DC390_detect: Error reading PCI config registers!\n"); continue; }
#endif 

#include "tmscsim.h"

#ifndef __init
# define __init
#endif

UCHAR dc390_StartSCSI( PACB pACB, PDCB pDCB, PSRB pSRB );
void dc390_DataOut_0( PACB pACB, PSRB pSRB, PUCHAR psstatus);
void dc390_DataIn_0( PACB pACB, PSRB pSRB, PUCHAR psstatus);
static void dc390_Command_0( PACB pACB, PSRB pSRB, PUCHAR psstatus);
static void dc390_Status_0( PACB pACB, PSRB pSRB, PUCHAR psstatus);
static void dc390_MsgOut_0( PACB pACB, PSRB pSRB, PUCHAR psstatus);
void dc390_MsgIn_0( PACB pACB, PSRB pSRB, PUCHAR psstatus);
static void dc390_DataOutPhase( PACB pACB, PSRB pSRB, PUCHAR psstatus);
static void dc390_DataInPhase( PACB pACB, PSRB pSRB, PUCHAR psstatus);
void dc390_CommandPhase( PACB pACB, PSRB pSRB, PUCHAR psstatus);
static void dc390_StatusPhase( PACB pACB, PSRB pSRB, PUCHAR psstatus);
void dc390_MsgOutPhase( PACB pACB, PSRB pSRB, PUCHAR psstatus);
static void dc390_MsgInPhase( PACB pACB, PSRB pSRB, PUCHAR psstatus);
static void dc390_Nop_0( PACB pACB, PSRB pSRB, PUCHAR psstatus);
static void dc390_Nop_1( PACB pACB, PSRB pSRB, PUCHAR psstatus);

static void dc390_SetXferRate( PACB pACB, PDCB pDCB );
void dc390_Disconnect( PACB pACB );
void dc390_Reselect( PACB pACB );
void dc390_SRBdone( PACB pACB, PDCB pDCB, PSRB pSRB );
void dc390_DoingSRB_Done( PACB pACB, PSCSICMD cmd );
static void dc390_ScsiRstDetect( PACB pACB );
static void dc390_ResetSCSIBus( PACB pACB );
static void __inline__ dc390_RequestSense( PACB pACB, PDCB pDCB, PSRB pSRB );
static void __inline__ dc390_InvalidCmd( PACB pACB );
static void __inline__ dc390_EnableMsgOut_Abort (PACB, PSRB);
static void dc390_remove_dev (PACB pACB, PDCB pDCB);
void do_DC390_Interrupt( int, void *, struct pt_regs *);

int    dc390_initAdapter( PSH psh, ULONG io_port, UCHAR Irq, UCHAR index );
void   dc390_initDCB( PACB pACB, PDCB *ppDCB, UCHAR id, UCHAR lun);
void   dc390_updateDCB (PACB pACB, PDCB pDCB);

#ifdef MODULE
 static int DC390_release(struct Scsi_Host *host);
 static int dc390_shutdown (struct Scsi_Host *host);
#endif


//static PSHT   dc390_pSHT_start = NULL;
//static PSH    dc390_pSH_start = NULL;
//static PSH    dc390_pSH_current = NULL;
static PACB     dc390_pACB_start= NULL;
static PACB     dc390_pACB_current = NULL;
static ULONG    dc390_lastabortedpid = 0;
static UINT     dc390_laststatus = 0;
static UCHAR    dc390_adapterCnt = 0;

/* Startup values, to be overriden on the commandline */
int tmscsim[] = {-2, -2, -2, -2, -2, -2};

# if defined(MODULE) && LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,30)
MODULE_PARM(tmscsim, "1-6i");
MODULE_PARM_DESC(tmscsim, "Host SCSI ID, Speed (0=10MHz), Device Flags, Adapter Flags, Max Tags (log2(tags)-1), DelayReset (s)");
# endif

#if defined(MODULE) && LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,30)
MODULE_AUTHOR("C.L. Huang / Kurt Garloff");
MODULE_DESCRIPTION("SCSI host adapter driver for Tekram DC390 and other AMD53C974A based PCI SCSI adapters");
MODULE_SUPPORTED_DEVICE("sd,sr,sg,st");
#endif

static PVOID dc390_phase0[]={
       dc390_DataOut_0,
       dc390_DataIn_0,
       dc390_Command_0,
       dc390_Status_0,
       dc390_Nop_0,
       dc390_Nop_0,
       dc390_MsgOut_0,
       dc390_MsgIn_0,
       dc390_Nop_1
       };

static PVOID dc390_phase1[]={
       dc390_DataOutPhase,
       dc390_DataInPhase,
       dc390_CommandPhase,
       dc390_StatusPhase,
       dc390_Nop_0,
       dc390_Nop_0,
       dc390_MsgOutPhase,
       dc390_MsgInPhase,
       dc390_Nop_1
       };

#ifdef DC390_DEBUG1
static char* dc390_p0_str[] = {
       "dc390_DataOut_0",
       "dc390_DataIn_0",
       "dc390_Command_0",
       "dc390_Status_0",
       "dc390_Nop_0",
       "dc390_Nop_0",
       "dc390_MsgOut_0",
       "dc390_MsgIn_0",
       "dc390_Nop_1"
       };
     
static char* dc390_p1_str[] = {
       "dc390_DataOutPhase",
       "dc390_DataInPhase",
       "dc390_CommandPhase",
       "dc390_StatusPhase",
       "dc390_Nop_0",
       "dc390_Nop_0",
       "dc390_MsgOutPhase",
       "dc390_MsgInPhase",
       "dc390_Nop_1"
       };
#endif   

/* Devices erroneously pretending to be able to do TagQ */
UCHAR  dc390_baddevname1[2][28] ={
       "SEAGATE ST3390N         9546",
       "HP      C3323-300       4269"};
#define BADDEVCNT       2

static char*  dc390_adapname = "DC390";
UCHAR  dc390_eepromBuf[MAX_ADAPTER_NUM][EE_LEN];
UCHAR  dc390_clock_period1[] = {4, 5, 6, 7, 8, 10, 13, 20};
UCHAR  dc390_clock_speed[] = {100,80,67,57,50, 40, 31, 20};

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,30)
struct proc_dir_entry   DC390_proc_scsi_tmscsim ={
       PROC_SCSI_DC390T, 7 ,"tmscsim",
       S_IFDIR | S_IRUGO | S_IXUGO, 2
       };
#endif

/***********************************************************************
 * Functions for access to DC390 EEPROM
 * and some to emulate it
 *
 **********************************************************************/


static void __init dc390_EnDisableCE( UCHAR mode, PDEVDECL, PUCHAR regval )
{
    UCHAR bval;

    bval = 0;
    if(mode == ENABLE_CE)
        *regval = 0xc0;
    else
        *regval = 0x80;
    PCI_WRITE_CONFIG_BYTE(PDEV, *regval, bval);
    if(mode == DISABLE_CE)
        PCI_WRITE_CONFIG_BYTE(PDEV, *regval, bval);
    udelay(160);
}


/* Override EEprom values with explicitly set values */
static void __init dc390_EEprom_Override (UCHAR index)
{
    PUCHAR ptr;
    UCHAR  id;
    ptr = (PUCHAR) dc390_eepromBuf[index];
    
    /* Adapter Settings */
    if (tmscsim[0] != -2)
        ptr[EE_ADAPT_SCSI_ID] = (UCHAR)tmscsim[0];      /* Adapter ID */
    if (tmscsim[3] != -2)
        ptr[EE_MODE2] = (UCHAR)tmscsim[3];
    if (tmscsim[5] != -2)
        ptr[EE_DELAY] = tmscsim[5];                     /* Reset delay */
    if (tmscsim[4] != -2)
        ptr[EE_TAG_CMD_NUM] = (UCHAR)tmscsim[4];        /* Tagged Cmds */
    
    /* Device Settings */
    for (id = 0; id < MAX_SCSI_ID; id++)
    {
        if (tmscsim[2] != -2)
                ptr[id<<2] = (UCHAR)tmscsim[2];         /* EE_MODE1 */
        if (tmscsim[1] != -2)
                ptr[(id<<2) + 1] = (UCHAR)tmscsim[1];   /* EE_Speed */
    };
}

/* Handle "-1" case */
static void __init dc390_check_for_safe_settings (void)
{
        if (tmscsim[0] == -1 || tmscsim[0] > 15) /* modules-2.0.0 passes -1 as string */
        {
                tmscsim[0] = 7; tmscsim[1] = 4;
                tmscsim[2] = 0x09; tmscsim[3] = 0x0f;
                tmscsim[4] = 2; tmscsim[5] = 10;
                printk (KERN_INFO "DC390: Using safe settings.\n");
        }
}


#ifndef CONFIG_SCSI_DC390T_NOGENSUPP
int __initdata tmscsim_def[] = {7, 0 /* 10MHz */,
                PARITY_CHK_ | SEND_START_ | EN_DISCONNECT_
                | SYNC_NEGO_ | TAG_QUEUEING_,
                MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION
                /* | NO_SEEK */
# ifdef CONFIG_SCSI_MULTI_LUN
                | LUN_CHECK
# endif
                , 3 /* 16 Tags per LUN */, 1 /* s delay after Reset */ };

/* Copy defaults over set values where missing */
static void __init dc390_fill_with_defaults (void)
{
        int i;
        PARSEDEBUG(printk(KERN_INFO "DC390: setup %08x %08x %08x %08x %08x %08x\n", tmscsim[0],\
                      tmscsim[1], tmscsim[2], tmscsim[3], tmscsim[4], tmscsim[5]);)
        for (i = 0; i < 6; i++)
        {
                if (tmscsim[i] < 0 || tmscsim[i] > 255)
                        tmscsim[i] = tmscsim_def[i];
        }
        /* Sanity checks */
        if (tmscsim[0] >   7) tmscsim[0] =   7;
        if (tmscsim[1] >   7) tmscsim[1] =   4;
        if (tmscsim[4] >   5) tmscsim[4] =   4;
        if (tmscsim[5] > 180) tmscsim[5] = 180;
};
#endif

/* Override defaults on cmdline:
 * tmscsim: AdaptID, MaxSpeed (Index), DevMode (Bitmapped), AdaptMode (Bitmapped)
 */
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,13)
void __init dc390_setup (char *str)
{       
        int ints[8];
        int i, im;
        (void)get_options (str, ARRAY_SIZE(ints), ints);
#else
void __init dc390_setup (char *str, int *ints)
{
        int i, im;
#endif
        im = ints[0];
        if (im > 6)
        {
                printk (KERN_NOTICE "DC390: ignore extra params!\n");
                im = 6;
        };
        for (i = 0; i < im; i++)
                tmscsim[i] = ints[i+1];
        /* dc390_checkparams (); */
};

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,13)
#ifndef MODULE
__setup("tmscsim=", dc390_setup);
#endif
#endif


static void __init dc390_EEpromOutDI( PDEVDECL, PUCHAR regval, UCHAR Carry )
{
    UCHAR bval;

    bval = 0;
    if(Carry)
    {
        bval = 0x40;
        *regval = 0x80;
        PCI_WRITE_CONFIG_BYTE(PDEV, *regval, bval);
    }
    udelay(160);
    bval |= 0x80;
    PCI_WRITE_CONFIG_BYTE(PDEV, *regval, bval);
    udelay(160);
    bval = 0;
    PCI_WRITE_CONFIG_BYTE(PDEV, *regval, bval);
    udelay(160);
}


static UCHAR __init dc390_EEpromInDO( PDEVDECL )
{
    UCHAR bval;

    PCI_WRITE_CONFIG_BYTE(PDEV, 0x80, 0x80);
    udelay(160);
    PCI_WRITE_CONFIG_BYTE(PDEV, 0x80, 0x40);
    udelay(160);
    PCI_READ_CONFIG_BYTE(PDEV, 0x00, &bval);
    if(bval == 0x22)
        return(1);
    else
        return(0);
}


static USHORT __init dc390_EEpromGetData1( PDEVDECL )
{
    UCHAR i;
    UCHAR carryFlag;
    USHORT wval;

    wval = 0;
    for(i=0; i<16; i++)
    {
        wval <<= 1;
        carryFlag = dc390_EEpromInDO(PDEV);
        wval |= carryFlag;
    }
    return(wval);
}


static void __init dc390_Prepare( PDEVDECL, PUCHAR regval, UCHAR EEpromCmd )
{
    UCHAR i,j;
    UCHAR carryFlag;

    carryFlag = 1;
    j = 0x80;
    for(i=0; i<9; i++)
    {
        dc390_EEpromOutDI(PDEV,regval,carryFlag);
        carryFlag = (EEpromCmd & j) ? 1 : 0;
        j >>= 1;
    }
}


static void __init dc390_ReadEEprom( PDEVDECL, PUSHORT ptr)
{
    UCHAR   regval,cmd;
    UCHAR   i;

    cmd = EEPROM_READ;
    for(i=0; i<0x40; i++)
    {
        dc390_EnDisableCE(ENABLE_CE, PDEV, &regval);
        dc390_Prepare(PDEV, &regval, cmd++);
        *ptr++ = dc390_EEpromGetData1(PDEV);
        dc390_EnDisableCE(DISABLE_CE, PDEV, &regval);
    }
}


static void __init dc390_interpret_delay (UCHAR index)
{
    char interpd [] = {1,3,5,10,16,30,60,120};
    dc390_eepromBuf[index][EE_DELAY] = interpd [dc390_eepromBuf[index][EE_DELAY]];
};

static UCHAR __init dc390_CheckEEpromCheckSum( PDEVDECL, UCHAR index )
{
    UCHAR  i;
    char  EEbuf[128];
    USHORT wval, *ptr = (PUSHORT)EEbuf;

    dc390_ReadEEprom( PDEV, ptr );
    memcpy (dc390_eepromBuf[index], EEbuf, EE_ADAPT_SCSI_ID);
    memcpy (&dc390_eepromBuf[index][EE_ADAPT_SCSI_ID], 
            &EEbuf[REAL_EE_ADAPT_SCSI_ID], EE_LEN - EE_ADAPT_SCSI_ID);
    dc390_interpret_delay (index);
    
    wval = 0;
    for(i=0; i<0x40; i++, ptr++)
        wval += *ptr;
    return (wval == 0x1234 ? 0 : 1);
}


/***********************************************************************
 * Functions for the management of the internal structures 
 * (DCBs, SRBs, Queueing)
 *
 **********************************************************************/
static PDCB __inline__ dc390_findDCB ( PACB pACB, UCHAR id, UCHAR lun)
{
   PDCB pDCB = pACB->pLinkDCB; if (!pDCB) return 0;
   while (pDCB->TargetID != id || pDCB->TargetLUN != lun)
     {
        pDCB = pDCB->pNextDCB;
        if (pDCB == pACB->pLinkDCB)
          {
             DCBDEBUG(printk (KERN_WARNING "DC390: DCB not found (DCB=%p, DCBmap[%2x]=%2x)\n",
                     pDCB, id, pACB->DCBmap[id]);)
             return 0;
          }
     };
   DCBDEBUG1( printk (KERN_DEBUG "DCB %p (%02x,%02x) found.\n", \
                      pDCB, pDCB->TargetID, pDCB->TargetLUN);)
   return pDCB;
};

/* Queueing philosphy:
 * There are a couple of lists:
 * - Query: Contains the Scsi Commands not yet turned into SRBs (per ACB)
 *   (Note: For new EH, it is unecessary!)
 * - Waiting: Contains a list of SRBs not yet sent (per DCB)
 * - Free: List of free SRB slots
 * 
 * If there are no waiting commands for the DCB, the new one is sent to the bus
 * otherwise the oldest one is taken from the Waiting list and the new one is 
 * queued to the Waiting List
 * 
 * Lists are managed using two pointers and eventually a counter
 */


#if 0
/* Look for a SCSI cmd in a SRB queue */
static PSRB dc390_find_cmd_in_SRBq (PSCSICMD cmd, PSRB queue)
{
    PSRB q = queue;
    while (q)
    {
        if (q->pcmd == cmd) return q;
        q = q->pNextSRB;
        if (q == queue) return 0;
    }
    return q;
};
#endif
    

/* Append to Query List */
static void dc390_Query_append( PSCSICMD cmd, PACB pACB )
{
    DEBUG0(printk ("DC390: Append cmd %li to Query\n", cmd->pid);)
    if( !pACB->QueryCnt )
        pACB->pQueryHead = cmd;
    else
        pACB->pQueryTail->next = cmd;

    pACB->pQueryTail = cmd;
    pACB->QueryCnt++;
    pACB->CmdOutOfSRB++;
    cmd->next = NULL;
}


/* Return next cmd from Query list */
static PSCSICMD dc390_Query_get ( PACB pACB )
{
    PSCSICMD  pcmd;

    pcmd = pACB->pQueryHead;
    if (!pcmd) return pcmd;
    DEBUG0(printk ("DC390: Get cmd %li from Query\n", pcmd->pid);)
    pACB->pQueryHead = pcmd->next;
    pcmd->next = NULL;
    if (!pACB->pQueryHead) pACB->pQueryTail = NULL;
    pACB->QueryCnt--;
    return( pcmd );
}


/* Return next free SRB */
static __inline__ PSRB dc390_Free_get ( PACB pACB )
{
    PSRB   pSRB;

    pSRB = pACB->pFreeSRB;
    DEBUG0(printk ("DC390: Get Free SRB %p\n", pSRB);)
    if( pSRB )
    {
        pACB->pFreeSRB = pSRB->pNextSRB;
        pSRB->pNextSRB = NULL;
    }

    return( pSRB );
}

/* Insert SRB oin top of free list */
static __inline__ void dc390_Free_insert (PACB pACB, PSRB pSRB)
{
    DEBUG0(printk ("DC390: Free SRB %p\n", pSRB);)
    pSRB->pNextSRB = pACB->pFreeSRB;
    pACB->pFreeSRB = pSRB;
}


/* Inserts a SRB to the top of the Waiting list */
static __inline__ void dc390_Waiting_insert ( PDCB pDCB, PSRB pSRB )
{
    DEBUG0(printk ("DC390: Insert pSRB %p cmd %li to Waiting\n", pSRB, pSRB->pcmd->pid);)
    pSRB->pNextSRB = pDCB->pWaitingSRB;
    if (!pDCB->pWaitingSRB)
        pDCB->pWaitLast = pSRB;
    pDCB->pWaitingSRB = pSRB;
    pDCB->WaitSRBCnt++;
}


/* Queue SRB to waiting list */
static __inline__ void dc390_Waiting_append ( PDCB pDCB, PSRB pSRB)
{
    DEBUG0(printk ("DC390: Append pSRB %p cmd %li to Waiting\n", pSRB, pSRB->pcmd->pid);)
    if( pDCB->pWaitingSRB )
        pDCB->pWaitLast->pNextSRB = pSRB;
    else
        pDCB->pWaitingSRB = pSRB;

    pDCB->pWaitLast = pSRB;
    pSRB->pNextSRB = NULL;
    pDCB->WaitSRBCnt++;
    pDCB->pDCBACB->CmdInQ++;
}

static __inline__ void dc390_Going_append (PDCB pDCB, PSRB pSRB)
{
    pDCB->GoingSRBCnt++;
    DEBUG0(printk("DC390: Append SRB %p to Going\n", pSRB);)
    /* Append to the list of Going commands */
    if( pDCB->pGoingSRB )
        pDCB->pGoingLast->pNextSRB = pSRB;
    else
        pDCB->pGoingSRB = pSRB;

    pDCB->pGoingLast = pSRB;
    /* No next one in sent list */
    pSRB->pNextSRB = NULL;
};

static __inline__ void dc390_Going_remove (PDCB pDCB, PSRB pSRB)
{
   DEBUG0(printk("DC390: Remove SRB %p from Going\n", pSRB);)
   if (pSRB == pDCB->pGoingSRB)
        pDCB->pGoingSRB = pSRB->pNextSRB;
   else
     {
        PSRB psrb = pDCB->pGoingSRB;
        while (psrb && psrb->pNextSRB != pSRB)
          psrb = psrb->pNextSRB;
        if (!psrb) 
          { printk (KERN_ERR "DC390: Remove non-ex. SRB %p from Going!\n", pSRB); return; }
        psrb->pNextSRB = pSRB->pNextSRB;
        if (pSRB == pDCB->pGoingLast)
          pDCB->pGoingLast = psrb;
     }
   pDCB->GoingSRBCnt--;
};

/* Moves SRB from Going list to the top of Waiting list */
static void dc390_Going_to_Waiting ( PDCB pDCB, PSRB pSRB )
{
    DEBUG0(printk(KERN_INFO "DC390: Going_to_Waiting (SRB %p) pid = %li\n", pSRB, pSRB->pcmd->pid);)
    /* Remove SRB from Going */
    dc390_Going_remove (pDCB, pSRB);
    /* Insert on top of Waiting */
    dc390_Waiting_insert (pDCB, pSRB);
    /* Tag Mask must be freed elsewhere ! (KG, 99/06/18) */
}

/* Moves first SRB from Waiting list to Going list */
static __inline__ void dc390_Waiting_to_Going ( PDCB pDCB, PSRB pSRB )
{       
        /* Remove from waiting list */
        DEBUG0(printk("DC390: Remove SRB %p from head of Waiting\n", pSRB);)
        pDCB->pWaitingSRB = pSRB->pNextSRB;
        if( !pDCB->pWaitingSRB ) pDCB->pWaitLast = NULL;
        pDCB->WaitSRBCnt--;
        dc390_Going_append (pDCB, pSRB);
}

/* 2.0 timer compatibility */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,30)
 static inline int timer_pending(struct timer_list * timer)
 {
        return timer->prev != NULL;
 }
 #define time_after(a,b)         ((long)(b) - (long)(a) < 0)
 #define time_before(a,b)        time_after(b,a)
#endif

void DC390_waiting_timed_out (unsigned long ptr);
/* Sets the timer to wake us up */
static void dc390_waiting_timer (PACB pACB, unsigned long to)
{
        if (timer_pending (&pACB->Waiting_Timer)) return;
        init_timer (&pACB->Waiting_Timer);
        pACB->Waiting_Timer.function = DC390_waiting_timed_out;
        pACB->Waiting_Timer.data = (unsigned long)pACB;
        if (time_before (jiffies + to, pACB->pScsiHost->last_reset))
                pACB->Waiting_Timer.expires = pACB->pScsiHost->last_reset + 1;
        else
                pACB->Waiting_Timer.expires = jiffies + to + 1;
        add_timer (&pACB->Waiting_Timer);
}


/* Send the next command from the waiting list to the bus */
static void dc390_Waiting_process ( PACB pACB )
{
    PDCB   ptr, ptr1;
    PSRB   pSRB;

    if( (pACB->pActiveDCB) || (pACB->ACBFlag & (RESET_DETECT+RESET_DONE+RESET_DEV) ) )
        return;
    if (timer_pending (&pACB->Waiting_Timer)) del_timer (&pACB->Waiting_Timer);
    ptr = pACB->pDCBRunRobin;
    if( !ptr )
      {
        ptr = pACB->pLinkDCB;
        pACB->pDCBRunRobin = ptr;
      }
    ptr1 = ptr;
    if (!ptr1) return;
    do 
      {
        pACB->pDCBRunRobin = ptr1->pNextDCB;
        if( !( pSRB = ptr1->pWaitingSRB ) ||
            ( ptr1->MaxCommand <= ptr1->GoingSRBCnt ))
          ptr1 = ptr1->pNextDCB;
        else
          {
            /* Try to send to the bus */
            if( !dc390_StartSCSI(pACB, ptr1, pSRB) )
              dc390_Waiting_to_Going (ptr1, pSRB);
            else
              dc390_waiting_timer (pACB, HZ/5);
            break;
          }
      } while (ptr1 != ptr);
    return;
}

/* Wake up waiting queue */
void DC390_waiting_timed_out (unsigned long ptr)
{
        PACB pACB = (PACB)ptr;
        DC390_IFLAGS
        DC390_AFLAGS
        DEBUG0(printk ("DC390: Debug: Waiting queue woken up by timer!\n");)
        DC390_LOCK_IO;
        DC390_LOCK_ACB;
        dc390_Waiting_process (pACB);
        DC390_UNLOCK_ACB;
        DC390_UNLOCK_IO;
}

/***********************************************************************
 * Function: static void dc390_SendSRB (PACB pACB, PSRB pSRB)
 *
 * Purpose: Send SCSI Request Block (pSRB) to adapter (pACB)
 *
 ***********************************************************************/

static void dc390_SendSRB( PACB pACB, PSRB pSRB )
{
    PDCB   pDCB;

    pDCB = pSRB->pSRBDCB;
    if( (pDCB->MaxCommand <= pDCB->GoingSRBCnt) || (pACB->pActiveDCB) ||
        (pACB->ACBFlag & (RESET_DETECT+RESET_DONE+RESET_DEV)) )
    {
        dc390_Waiting_append (pDCB, pSRB);
        dc390_Waiting_process (pACB);
        return;
    }

#if 0
    if( pDCB->pWaitingSRB )
    {
        dc390_Waiting_append (pDCB, pSRB);
/*      pSRB = GetWaitingSRB(pDCB); */  /* non-existent */
        pSRB = pDCB->pWaitingSRB;
        /* Remove from waiting list */
        pDCB->pWaitingSRB = pSRB->pNextSRB;
        pSRB->pNextSRB = NULL;
        if (!pDCB->pWaitingSRB) pDCB->pWaitLast = NULL;
    }
#endif
        
    if (!dc390_StartSCSI(pACB, pDCB, pSRB))
        dc390_Going_append (pDCB, pSRB);
    else {
        dc390_Waiting_insert (pDCB, pSRB);
        dc390_waiting_timer (pACB, HZ/5);
    };
}

/***********************************************************************
 * Function: static void dc390_BuildSRB (Scsi_Cmd *pcmd, PDCB pDCB, 
 *                                       PSRB pSRB)
 *
 * Purpose: Prepare SRB for being sent to Device DCB w/ command *pcmd
 *
 ***********************************************************************/

static void dc390_BuildSRB (Scsi_Cmnd* pcmd, PDCB pDCB, PSRB pSRB)
{
    pSRB->pSRBDCB = pDCB;
    pSRB->pcmd = pcmd;
    //pSRB->ScsiCmdLen = pcmd->cmd_len;
    //memcpy (pSRB->CmdBlock, pcmd->cmnd, pcmd->cmd_len);
    
    if( pcmd->use_sg )
    {
        pSRB->SGcount = (UCHAR) pcmd->use_sg;
        pSRB->pSegmentList = (PSGL) pcmd->request_buffer;
    }
    else if( pcmd->request_buffer )
    {
        pSRB->SGcount = 1;
        pSRB->pSegmentList = (PSGL) &pSRB->Segmentx;
        pSRB->Segmentx.address = (PUCHAR) pcmd->request_buffer;
        pSRB->Segmentx.length = pcmd->request_bufflen;
    }
    else
        pSRB->SGcount = 0;

    pSRB->SGIndex = 0;
    pSRB->AdaptStatus = 0;
    pSRB->TargetStatus = 0;
    pSRB->MsgCnt = 0;
    if( pDCB->DevType != TYPE_TAPE )
        pSRB->RetryCnt = 1;
    else
        pSRB->RetryCnt = 0;
    pSRB->SRBStatus = 0;
    pSRB->SRBFlag = 0;
    pSRB->SRBState = 0;
    pSRB->TotalXferredLen = 0;
    pSRB->SGBusAddr = 0;
    pSRB->SGToBeXferLen = 0;
    pSRB->ScsiPhase = 0;
    pSRB->EndMessage = 0;
    pSRB->TagNumber = 255;
};

/* Put cmnd from Query to Waiting list and send next Waiting cmnd */
static void dc390_Query_to_Waiting (PACB pACB)
{
    Scsi_Cmnd *pcmd;
    PSRB   pSRB;
    PDCB   pDCB;

    if( pACB->ACBFlag & (RESET_DETECT+RESET_DONE+RESET_DEV) )
        return;

    while (pACB->QueryCnt)
    {
        pSRB = dc390_Free_get ( pACB );
        if (!pSRB) return;
        pcmd = dc390_Query_get ( pACB );
        if (!pcmd) { dc390_Free_insert (pACB, pSRB); return; }; /* should not happen */
        pDCB = dc390_findDCB (pACB, pcmd->target, pcmd->lun);
        if (!pDCB) 
        { 
                dc390_Free_insert (pACB, pSRB);
                printk (KERN_ERR "DC390: Command in queue to non-existing device!\n");
                pcmd->result = MK_RES(DRIVER_ERROR,DID_ERROR,0,0);
                DC390_UNLOCK_ACB_NI;
                pcmd->done (pcmd);
                DC390_LOCK_ACB_NI;
        };
        dc390_BuildSRB (pcmd, pDCB, pSRB);
        dc390_Waiting_append ( pDCB, pSRB );
    }
}

/***********************************************************************
 * Function : static int DC390_queue_command (Scsi_Cmnd *cmd,
 *                                             void (*done)(Scsi_Cmnd *))
 *
 * Purpose : enqueues a SCSI command
 *
 * Inputs : cmd - SCSI command, done - callback function called on 
 *          completion, with a pointer to the command descriptor.
 *
 * Returns : (depending on kernel version)
 * 2.0.x: always return 0
 * 2.1.x: old model: (use_new_eh_code == 0): like 2.0.x
 *        TO BE DONE:
 *        new model: return 0 if successful
 *                   return 1 if command cannot be queued (queue full)
 *                   command will be inserted in midlevel queue then ...
 *
 ***********************************************************************/

int DC390_queue_command (Scsi_Cmnd *cmd, void (* done)(Scsi_Cmnd *))
{
    PDCB   pDCB;
    PSRB   pSRB;
    DC390_AFLAGS
    PACB   pACB = (PACB) cmd->host->hostdata;


    DEBUG0(/*  if(pACB->scan_devices) */        \
        printk(KERN_INFO "DC390: Queue Cmd=%02x,Tgt=%d,LUN=%d (pid=%li)\n",\
                cmd->cmnd[0],cmd->target,cmd->lun,cmd->pid);)

    DC390_LOCK_ACB;
    
    /* Assume BAD_TARGET; will be cleared later */
    cmd->result = DID_BAD_TARGET << 16;
   
    /* TODO: Change the policy: Alway accept TEST_UNIT_READY or INQUIRY 
     * commands and alloc a DCB for the device if not yet there. DCB will
     * be removed in dc390_SRBdone if SEL_TIMEOUT */

    if( (pACB->scan_devices == END_SCAN) && (cmd->cmnd[0] != INQUIRY) )
        pACB->scan_devices = 0;

    else if( (pACB->scan_devices) && (cmd->cmnd[0] == READ_6) )
        pACB->scan_devices = 0;

    if ( ( cmd->target >= pACB->pScsiHost->max_id ) || 
         (cmd->lun >= pACB->pScsiHost->max_lun) )
    {
/*      printk ("DC390: Ignore target %d lun %d\n",
                cmd->target, cmd->lun); */
        DC390_UNLOCK_ACB;
        //return (1);
        done (cmd);
        return (0);
    }

    if( (pACB->scan_devices || cmd->cmnd[0] == TEST_UNIT_READY || cmd->cmnd[0] == INQUIRY) && 
       !(pACB->DCBmap[cmd->target] & (1 << cmd->lun)) )
    {
        pACB->scan_devices = 1;

        dc390_initDCB( pACB, &pDCB, cmd->target, cmd->lun );
        if (!pDCB)
          {
            printk (KERN_ERR "DC390: kmalloc for DCB failed, target %02x lun %02x\n", 
                    cmd->target, cmd->lun);
            DC390_UNLOCK_ACB;
            printk ("DC390: No DCB in queue_command!\n");
#ifdef USE_NEW_EH
            return (1);
#else
            done (cmd);
            return (0);
#endif
          };
            
    }
    else if( !(pACB->scan_devices) && !(pACB->DCBmap[cmd->target] & (1 << cmd->lun)) )
    {
        printk(KERN_INFO "DC390: Ignore target %02x lun %02x\n",
                cmd->target, cmd->lun); 
        DC390_UNLOCK_ACB;
        //return (1);
        done (cmd);
        return (0);
    }
    else
    {
        pDCB = dc390_findDCB (pACB, cmd->target, cmd->lun);
        if (!pDCB)
         {  /* should never happen */
            printk (KERN_ERR "DC390: no DCB failed, target %02x lun %02x\n", 
                    cmd->target, cmd->lun);
            DC390_UNLOCK_ACB;
            printk ("DC390: No DCB in queuecommand (2)!\n");
#ifdef USE_NEW_EH
            return (1);
#else
            done (cmd);
            return (0);
#endif
         };
    }

    pACB->Cmds++;
    cmd->scsi_done = done;
    cmd->result = 0;
        
    dc390_Query_to_Waiting (pACB);

    if( pACB->QueryCnt ) /* Unsent commands ? */
    {
        DEBUG0(printk ("DC390: QueryCnt != 0\n");)
        dc390_Query_append ( cmd, pACB );
        dc390_Waiting_process (pACB);
    }
    else if (pDCB->pWaitingSRB)
    {
        pSRB = dc390_Free_get ( pACB );
        DEBUG0(if (!pSRB) printk ("DC390: No free SRB but Waiting\n"); else printk ("DC390: Free SRB w/ Waiting\n");)
        if (!pSRB) dc390_Query_append (cmd, pACB);
        else 
          {
            dc390_BuildSRB (cmd, pDCB, pSRB);
            dc390_Waiting_append (pDCB, pSRB);
          }
        dc390_Waiting_process (pACB);
    }
    else
    {
        pSRB = dc390_Free_get ( pACB );
        DEBUG0(if (!pSRB) printk ("DC390: No free SRB w/o Waiting\n"); else printk ("DC390: Free SRB w/o Waiting\n");)
        if (!pSRB)
        {
            dc390_Query_append (cmd, pACB);
            dc390_Waiting_process (pACB);
        }
        else 
        {
            dc390_BuildSRB (cmd, pDCB, pSRB);
            dc390_SendSRB (pACB, pSRB);
        };
    };

    DC390_UNLOCK_ACB;
    DEBUG1(printk (KERN_DEBUG " ... command (pid %li) queued successfully.\n", cmd->pid);)
    return(0);
}

/* We ignore mapping problems, as we expect everybody to respect 
 * valid partition tables. Waiting for complaints ;-) */

#ifdef CONFIG_SCSI_DC390T_TRADMAP
/* 
 * The next function, partsize(), is copied from scsicam.c.
 *
 * This is ugly code duplication, but I didn't find another way to solve it:
 * We want to respect the partition table and if it fails, we apply the 
 * DC390 BIOS heuristic. Too bad, just calling scsicam_bios_param() doesn't do
 * the job, because we don't know, whether the values returned are from
 * the part. table or determined by setsize(). Unfortunately the setsize() 
 * values differ from the ones chosen by the DC390 BIOS.
 *
 * Looking forward to seeing suggestions for a better solution! KG, 98/10/14
 */
#include <asm/unaligned.h>

/*
 * Function : static int partsize(struct buffer_head *bh, unsigned long 
 *     capacity,unsigned int *cyls, unsigned int *hds, unsigned int *secs);
 *
 * Purpose : to determine the BIOS mapping used to create the partition
 *      table, storing the results in *cyls, *hds, and *secs 
 *
 * Returns : -1 on failure, 0 on success.
 *
 */

static int partsize(struct buffer_head *bh, unsigned long capacity,
    unsigned int  *cyls, unsigned int *hds, unsigned int *secs) {
    struct partition *p, *largest = NULL;
    int i, largest_cyl;
    int cyl, ext_cyl, end_head, end_cyl, end_sector;
    unsigned int logical_end, physical_end, ext_physical_end;
    

    if (*(unsigned short *) (bh->b_data+510) == 0xAA55) {
        for (largest_cyl = -1, p = (struct partition *) 
            (0x1BE + bh->b_data), i = 0; i < 4; ++i, ++p) {
            if (!p->sys_ind)
                continue;
            cyl = p->cyl + ((p->sector & 0xc0) << 2);
            if (cyl > largest_cyl) {
                largest_cyl = cyl;
                largest = p;
            }
        }
    }

    if (largest) {
        end_cyl = largest->end_cyl + ((largest->end_sector & 0xc0) << 2);
        end_head = largest->end_head;
        end_sector = largest->end_sector & 0x3f;

        physical_end =  end_cyl * (end_head + 1) * end_sector +
            end_head * end_sector + end_sector;

        /* This is the actual _sector_ number at the end */
        logical_end = get_unaligned(&largest->start_sect)
                        + get_unaligned(&largest->nr_sects);

        /* This is for >1023 cylinders */
        ext_cyl= (logical_end-(end_head * end_sector + end_sector))
                                        /(end_head + 1) / end_sector;
        ext_physical_end = ext_cyl * (end_head + 1) * end_sector +
            end_head * end_sector + end_sector;

        if ((logical_end == physical_end) ||
            (end_cyl==1023 && ext_physical_end==logical_end)) {
            *secs = end_sector;
            *hds = end_head + 1;
            *cyls = capacity / ((end_head + 1) * end_sector);
            return 0;
        }
    }
    return -1;
}

/***********************************************************************
 * Function:
 *   DC390_bios_param
 *
 * Description:
 *   Return the disk geometry for the given SCSI device.
 *   Respect the partition table, otherwise try own heuristic
 *
 * Note:
 *   In contrary to other externally callable funcs (DC390_), we don't lock
 ***********************************************************************/
int DC390_bios_param (Disk *disk, kdev_t devno, int geom[])
{
    int heads, sectors, cylinders;
    PACB pACB = (PACB) disk->device->host->hostdata;
    struct buffer_head *bh;
    int ret_code = -1;
    int size = disk->capacity;

    if ((bh = bread(MKDEV(MAJOR(devno), MINOR(devno)&~0xf), 0, 1024)))
    {
        /* try to infer mapping from partition table */
        ret_code = partsize (bh, (unsigned long) size, (unsigned int *) geom + 2,
                             (unsigned int *) geom + 0, (unsigned int *) geom + 1);
        brelse (bh);
    }
    if (ret_code == -1)
    {
        heads = 64;
        sectors = 32;
        cylinders = size / (heads * sectors);

        if ( (pACB->Gmode2 & GREATER_1G) && (cylinders > 1024) )
        {
                heads = 255;
                sectors = 63;
                cylinders = size / (heads * sectors);
        }

        geom[0] = heads;
        geom[1] = sectors;
        geom[2] = cylinders;
    }

    return (0);
}
#else
int DC390_bios_param (Disk *disk, kdev_t devno, int geom[])
{
    return scsicam_bios_param (disk, devno, geom);
};
#endif


void dc390_dumpinfo (PACB pACB, PDCB pDCB, PSRB pSRB)
{
    USHORT pstat; PDEVDECL1;
    if (!pDCB) pDCB = pACB->pActiveDCB;
    if (!pSRB && pDCB) pSRB = pDCB->pActiveSRB;

    if (pSRB) 
    {
        printk ("DC390: SRB: Xferred %08lx, Remain %08lx, State %08x, Phase %02x\n",
                pSRB->TotalXferredLen, pSRB->SGToBeXferLen, pSRB->SRBState,
                pSRB->ScsiPhase);
        printk ("DC390: AdpaterStatus: %02x, SRB Status %02x\n", pSRB->AdaptStatus, pSRB->SRBStatus);
    };
    printk ("DC390: Status of last IRQ (DMA/SC/Int/IRQ): %08x\n", dc390_laststatus);
    printk ("DC390: Register dump: SCSI block:\n");
    printk ("DC390: XferCnt  Cmd Stat IntS IRQS FFIS Ctl1 Ctl2 Ctl3 Ctl4\n");
    printk ("DC390:  %06x   %02x   %02x   %02x",
            DC390_read8(CtcReg_Low) + (DC390_read8(CtcReg_Mid) << 8) + (DC390_read8(CtcReg_High) << 16),
            DC390_read8(ScsiCmd), DC390_read8(Scsi_Status), DC390_read8(Intern_State));
    printk ("   %02x   %02x   %02x   %02x   %02x   %02x\n",
            DC390_read8(INT_Status), DC390_read8(Current_Fifo), DC390_read8(CtrlReg1),
            DC390_read8(CtrlReg2), DC390_read8(CtrlReg3), DC390_read8(CtrlReg4));
    DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
    if (DC390_read8(Current_Fifo) & 0x1f)
      {
        printk ("DC390: FIFO:");
        while (DC390_read8(Current_Fifo) & 0x1f) printk (" %02x", DC390_read8(ScsiFifo));
        printk ("\n");
      };
    printk ("DC390: Register dump: DMA engine:\n");
    printk ("DC390: Cmd   STrCnt    SBusA    WrkBC    WrkAC Stat SBusCtrl\n");
    printk ("DC390:  %02x %08x %08x %08x %08x   %02x %08x\n",
            DC390_read8(DMA_Cmd), DC390_read32(DMA_XferCnt), DC390_read32(DMA_XferAddr),
            DC390_read32(DMA_Wk_ByteCntr), DC390_read32(DMA_Wk_AddrCntr),
            DC390_read8(DMA_Status), DC390_read32(DMA_ScsiBusCtrl));
    DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
    PDEVSET1; PCI_READ_CONFIG_WORD(PDEV, PCI_STATUS, &pstat);
    printk ("DC390: Register dump: PCI Status: %04x\n", pstat);
    printk ("DC390: In case of driver trouble read linux/drivers/scsi/README.tmscsim\n");
};


/***********************************************************************
 * Function : int DC390_abort (Scsi_Cmnd *cmd)
 *
 * Purpose : Abort an errant SCSI command
 *
 * Inputs : cmd - command to abort
 *
 * Returns : 0 on success, -1 on failure.
 *
 * Status: Buggy !
 ***********************************************************************/

int DC390_abort (Scsi_Cmnd *cmd)
{
    PDCB  pDCB;
    PSRB  pSRB, psrb;
    UINT  count, i;
    PSCSICMD  pcmd;
    int   status;
    //ULONG sbac;
    DC390_AFLAGS
    PACB  pACB = (PACB) cmd->host->hostdata;

    DC390_LOCK_ACB;

    printk ("DC390: Abort command (pid %li, Device %02i-%02i)\n",
            cmd->pid, cmd->target, cmd->lun);

    /* First scan Query list */
    if( pACB->QueryCnt )
    {
        pcmd = pACB->pQueryHead;
        if( pcmd == cmd )
        {
            /* Found: Dequeue */
            pACB->pQueryHead = pcmd->next;
            pcmd->next = NULL;
            if (cmd == pACB->pQueryTail) pACB->pQueryTail = NULL;
            pACB->QueryCnt--;
            status = SCSI_ABORT_SUCCESS;
            goto  ABO_X;
        }
        for( count = pACB->QueryCnt, i=0; i<count-1; i++)
        {
            if( pcmd->next == cmd )
            {
                pcmd->next = cmd->next;
                cmd->next = NULL;
                if (cmd == pACB->pQueryTail) pACB->pQueryTail = NULL;
                pACB->QueryCnt--;
                status = SCSI_ABORT_SUCCESS;
                goto  ABO_X;
            }
            else
            {
                pcmd = pcmd->next;
            }
        }
    }
        
    pDCB = dc390_findDCB (pACB, cmd->target, cmd->lun);
    if( !pDCB ) goto  NOT_RUN;

    /* Added 98/07/02 KG */
    /*
    pSRB = pDCB->pActiveSRB;
    if (pSRB && pSRB->pcmd == cmd )
        goto ON_GOING;
     */
    
    pSRB = pDCB->pWaitingSRB;
    if( !pSRB )
        goto  ON_GOING;

    /* Now scan Waiting queue */
    if( pSRB->pcmd == cmd )
    {
        pDCB->pWaitingSRB = pSRB->pNextSRB;
        goto  IN_WAIT;
    }
    else
    {
        psrb = pSRB;
        if( !(psrb->pNextSRB) )
            goto ON_GOING;
        while( psrb->pNextSRB->pcmd != cmd )
        {
            psrb = psrb->pNextSRB;
            if( !(psrb->pNextSRB) || psrb == pSRB)
                goto ON_GOING;
        }
        pSRB = psrb->pNextSRB;
        psrb->pNextSRB = pSRB->pNextSRB;
        if( pSRB == pDCB->pWaitLast )
            pDCB->pWaitLast = psrb;
IN_WAIT:
        dc390_Free_insert (pACB, pSRB);
        pDCB->WaitSRBCnt--;
        cmd->next = NULL;
        status = SCSI_ABORT_SUCCESS;
        goto  ABO_X;
    }

    /* SRB has already been sent ! */
ON_GOING:
    /* abort() is too stupid for already sent commands at the moment. 
     * If it's called we are in trouble anyway, so let's dump some info 
     * into the syslog at least. (KG, 98/08/20,99/06/20) */
    dc390_dumpinfo (pACB, pDCB, pSRB);
    pSRB = pDCB->pGoingSRB;
    pDCB->DCBFlag |= ABORT_DEV_;
    /* Now for the hard part: The command is currently processed */
    for( count = pDCB->GoingSRBCnt, i=0; i<count; i++)
    {
        if( pSRB->pcmd != cmd )
            pSRB = pSRB->pNextSRB;
        else
        {
            if( (pACB->pActiveDCB == pDCB) && (pDCB->pActiveSRB == pSRB) )
            {
                status = SCSI_ABORT_BUSY;
                printk ("DC390: Abort current command (pid %li, SRB %p)\n",
                        cmd->pid, pSRB);
                goto  ABO_X;
            }
            else
            {
                status = SCSI_ABORT_SNOOZE;
                goto  ABO_X;
            }
        }
    }

NOT_RUN:
    status = SCSI_ABORT_NOT_RUNNING;

ABO_X:
    cmd->result = DID_ABORT << 16;
    printk(KERN_INFO "DC390: Aborted pid %li with status %i\n", cmd->pid, status);
#if 0
    if (cmd->pid == dc390_lastabortedpid) /* repeated failure ? */
        {
                /* Let's do something to help the bus getting clean again */
                DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
                DC390_write8 (ScsiCmd, DMA_COMMAND);
                //DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
                //DC390_write8 (ScsiCmd, RESET_ATN_CMD);
                DC390_write8 (ScsiCmd, NOP_CMD);
                //udelay (10000);
                //DC390_read8 (INT_Status);
                //DC390_write8 (ScsiCmd, EN_SEL_RESEL);
        };
    sbac = DC390_read32 (DMA_ScsiBusCtrl);
    if (sbac & SCSI_BUSY)
    {   /* clear BSY, SEL and ATN */
        printk (KERN_WARNING "DC390: Reset SCSI device: ");
        //DC390_write32 (DMA_ScsiBusCtrl, (sbac | SCAM) & ~SCSI_LINES);
        //udelay (250);
        //sbac = DC390_read32 (DMA_ScsiBusCtrl);
        //printk ("%08lx ", sbac);
        //DC390_write32 (DMA_ScsiBusCtrl, sbac & ~(SCSI_LINES | SCAM));
        //udelay (100);
        //sbac = DC390_read32 (DMA_ScsiBusCtrl);
        //printk ("%08lx ", sbac);
        DC390_write8 (ScsiCmd, RST_DEVICE_CMD);
        udelay (250);
        DC390_write8 (ScsiCmd, NOP_CMD);
        sbac = DC390_read32 (DMA_ScsiBusCtrl);
        printk ("%08lx\n", sbac);
    };
#endif
    dc390_lastabortedpid = cmd->pid;
    DC390_UNLOCK_ACB;
    //do_DC390_Interrupt (pACB->IRQLevel, 0, 0);
#ifndef USE_NEW_EH      
    if (status == SCSI_ABORT_SUCCESS) cmd->scsi_done(cmd);
#endif  
    return( status );
}


static void dc390_ResetDevParam( PACB pACB )
{
    PDCB   pDCB, pdcb;

    pDCB = pACB->pLinkDCB;
    if (! pDCB) return;
    pdcb = pDCB;
    do
    {
        pDCB->SyncMode &= ~SYNC_NEGO_DONE;
        pDCB->SyncPeriod = 0;
        pDCB->SyncOffset = 0;
        pDCB->TagMask = 0;
        pDCB->CtrlR3 = FAST_CLK;
        pDCB->CtrlR4 &= NEGATE_REQACKDATA | CTRL4_RESERVED | NEGATE_REQACK;
        pDCB->CtrlR4 |= pACB->glitch_cfg;
        pDCB = pDCB->pNextDCB;
    }
    while( pdcb != pDCB );
    pACB->ACBFlag &= ~(RESET_DEV | RESET_DONE | RESET_DETECT);

}

#if 0
/* Moves all SRBs from Going to Waiting for all DCBs */
static void dc390_RecoverSRB( PACB pACB )
{
    PDCB   pDCB, pdcb;
    PSRB   psrb, psrb2;
    UINT   cnt, i;

    pDCB = pACB->pLinkDCB;
    if( !pDCB ) return;
    pdcb = pDCB;
    do
    {
        cnt = pdcb->GoingSRBCnt;
        psrb = pdcb->pGoingSRB;
        for (i=0; i<cnt; i++)
        {
            psrb2 = psrb;
            psrb = psrb->pNextSRB;
/*          dc390_RewaitSRB( pDCB, psrb ); */
            if( pdcb->pWaitingSRB )
            {
                psrb2->pNextSRB = pdcb->pWaitingSRB;
                pdcb->pWaitingSRB = psrb2;
            }
            else
            {
                pdcb->pWaitingSRB = psrb2;
                pdcb->pWaitLast = psrb2;
                psrb2->pNextSRB = NULL;
            }
        }
        pdcb->GoingSRBCnt = 0;
        pdcb->pGoingSRB = NULL;
        pdcb->TagMask = 0;
        pdcb = pdcb->pNextDCB;
    } while( pdcb != pDCB );
}
#endif

/***********************************************************************
 * Function : int DC390_reset (Scsi_Cmnd *cmd, ...)
 *
 * Purpose : perform a hard reset on the SCSI bus
 *
 * Inputs : cmd - command which caused the SCSI RESET
 *          resetFlags - how hard to try
 *
 * Returns : 0 on success.
 ***********************************************************************/

int DC390_reset (Scsi_Cmnd *cmd, unsigned int resetFlags)
{
    UCHAR   bval;
    DC390_AFLAGS
    PACB    pACB = (PACB) cmd->host->hostdata;

    printk(KERN_INFO "DC390: RESET ... ");

    DC390_LOCK_ACB;
    if (timer_pending (&pACB->Waiting_Timer)) del_timer (&pACB->Waiting_Timer);
    bval = DC390_read8 (CtrlReg1);
    bval |= DIS_INT_ON_SCSI_RST;
    DC390_write8 (CtrlReg1, bval);      /* disable IRQ on bus reset */

    pACB->ACBFlag |= RESET_DEV;
    dc390_ResetSCSIBus( pACB );

    dc390_ResetDevParam( pACB );
    udelay (1000);
    pACB->pScsiHost->last_reset = jiffies + 3*HZ/2 
                + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
    
    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
    DC390_read8 (INT_Status);           /* Reset Pending INT */

    dc390_DoingSRB_Done( pACB, cmd );
    /* dc390_RecoverSRB (pACB); */
    pACB->pActiveDCB = NULL;

    pACB->ACBFlag = 0;
    bval = DC390_read8 (CtrlReg1);
    bval &= ~DIS_INT_ON_SCSI_RST;
    DC390_write8 (CtrlReg1, bval);      /* re-enable interrupt */

    dc390_Waiting_process( pACB );

    printk("done\n");
    DC390_UNLOCK_ACB;
    return( SCSI_RESET_SUCCESS );
}

#include "scsiiom.c"


/***********************************************************************
 * Function : static void dc390_initDCB()
 *
 * Purpose :  initialize the internal structures for a DCB (to be malloced)
 *
 * Inputs : SCSI id and lun
 ***********************************************************************/

void dc390_initDCB( PACB pACB, PDCB *ppDCB, UCHAR id, UCHAR lun )
{
    PEEprom     prom;
    UCHAR       index;
    PDCB pDCB, pDCB2;

    pDCB = kmalloc (sizeof(DC390_DCB), GFP_ATOMIC);
    DCBDEBUG(printk (KERN_INFO "DC390: alloc mem for DCB (ID %i, LUN %i): %p\n" \
            id, lun, pDCB);)
 
    *ppDCB = pDCB; pDCB2 = 0;
    if (!pDCB) return;
    if( pACB->DCBCnt == 0 )
    {
        pACB->pLinkDCB = pDCB;
        pACB->pDCBRunRobin = pDCB;
    }
    else
    {
        pACB->pLastDCB->pNextDCB = pDCB;
    };
   
    pACB->DCBCnt++;
   
    pDCB->pNextDCB = pACB->pLinkDCB;
    pACB->pLastDCB = pDCB;

    pDCB->pDCBACB = pACB;
    pDCB->TargetID = id;
    pDCB->TargetLUN = lun;
    pDCB->pWaitingSRB = NULL;
    pDCB->pGoingSRB = NULL;
    pDCB->GoingSRBCnt = 0;
    pDCB->WaitSRBCnt = 0;
    pDCB->pActiveSRB = NULL;
    pDCB->TagMask = 0;
    pDCB->MaxCommand = 1;
    index = pACB->AdapterIndex;
    pDCB->DCBFlag = 0;

    /* Is there a corresp. LUN==0 device ? */
    if (lun != 0)
        pDCB2 = dc390_findDCB (pACB, id, 0);
    prom = (PEEprom) &dc390_eepromBuf[index][id << 2];
    /* Some values are for all LUNs: Copy them */
    /* In a clean way: We would have an own structure for a SCSI-ID */
    if (pDCB2)
    {
      pDCB->DevMode = pDCB2->DevMode;
      pDCB->SyncMode = pDCB2->SyncMode;
      pDCB->SyncPeriod = pDCB2->SyncPeriod;
      pDCB->SyncOffset = pDCB2->SyncOffset;
      pDCB->NegoPeriod = pDCB2->NegoPeriod;
      
      pDCB->CtrlR3 = pDCB2->CtrlR3;
      pDCB->CtrlR4 = pDCB2->CtrlR4;
      pDCB->Inquiry7 = pDCB2->Inquiry7;
    }
    else
    {           
      pDCB->DevMode = prom->EE_MODE1;
      pDCB->SyncMode = 0;
      pDCB->SyncPeriod = 0;
      pDCB->SyncOffset = 0;
      pDCB->NegoPeriod = (dc390_clock_period1[prom->EE_SPEED] * 25) >> 2;
            
      pDCB->CtrlR3 = FAST_CLK;
      
      pDCB->CtrlR4 = pACB->glitch_cfg | CTRL4_RESERVED;
      if( dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION)
        pDCB->CtrlR4 |= NEGATE_REQACKDATA | NEGATE_REQACK;
      pDCB->Inquiry7 = 0;
    }

    pACB->DCBmap[id] |= (1 << lun);
    dc390_updateDCB(pACB, pDCB);
}

/***********************************************************************
 * Function : static void dc390_updateDCB()
 *
 * Purpose :  Set the configuration dependent DCB parameters
 ***********************************************************************/

void dc390_updateDCB (PACB pACB, PDCB pDCB)
{
  pDCB->SyncMode &= EN_TAG_QUEUEING | SYNC_NEGO_DONE /*| EN_ATN_STOP*/;
  if (pDCB->DevMode & TAG_QUEUEING_) {
        //if (pDCB->SyncMode & EN_TAG_QUEUEING) pDCB->MaxCommand = pACB->TagMaxNum;
  } else {
        pDCB->SyncMode &= ~EN_TAG_QUEUEING;
        pDCB->MaxCommand = 1;
  };

  if( pDCB->DevMode & SYNC_NEGO_ )
        pDCB->SyncMode |= SYNC_ENABLE;
  else {
        pDCB->SyncMode &= ~(SYNC_NEGO_DONE | SYNC_ENABLE);
        pDCB->SyncOffset &= ~0x0f;
  };

  //if (! (pDCB->DevMode & EN_DISCONNECT_)) pDCB->SyncMode &= ~EN_ATN_STOP; 

  pDCB->CtrlR1 = pACB->pScsiHost->this_id;
  if( pDCB->DevMode & PARITY_CHK_ )
        pDCB->CtrlR1 |= PARITY_ERR_REPO;
};  


/***********************************************************************
 * Function : static void dc390_updateDCBs ()
 *
 * Purpose :  Set the configuration dependent DCB params for all DCBs
 ***********************************************************************/

static void dc390_updateDCBs (PACB pACB)
{
  int i;
  PDCB pDCB = pACB->pLinkDCB;
  for (i = 0; i < pACB->DCBCnt; i++)
    {
      dc390_updateDCB (pACB, pDCB);
      pDCB = pDCB->pNextDCB;
    };
};
  

/***********************************************************************
 * Function : static void dc390_initSRB()
 *
 * Purpose :  initialize the internal structures for a given SRB
 *
 * Inputs : psrb - pointer to this scsi request block structure
 ***********************************************************************/

static void __inline__ dc390_initSRB( PSRB psrb )
{
  /* psrb->PhysSRB = virt_to_phys( psrb ); */
}


void dc390_linkSRB( PACB pACB )
{
    UINT   count, i;

    count = pACB->SRBCount;
    for( i=0; i<count; i++)
    {
        if( i != count-1 )
            pACB->SRB_array[i].pNextSRB = &pACB->SRB_array[i+1];
        else
            pACB->SRB_array[i].pNextSRB = NULL;
        dc390_initSRB( &pACB->SRB_array[i] );
    }
}


/***********************************************************************
 * Function : static void dc390_initACB ()
 *
 * Purpose :  initialize the internal structures for a given SCSI host
 *
 * Inputs : psh - pointer to this host adapter's structure
 *          io_port, Irq, index: Resources and adapter index
 ***********************************************************************/

void __init dc390_initACB (PSH psh, ULONG io_port, UCHAR Irq, UCHAR index)
{
    PACB    pACB;
    UCHAR   i;
    DC390_AFLAGS

    psh->can_queue = MAX_CMD_QUEUE;
    psh->cmd_per_lun = MAX_CMD_PER_LUN;
    psh->this_id = (int) dc390_eepromBuf[index][EE_ADAPT_SCSI_ID];
    psh->io_port = io_port;
    psh->n_io_port = 0x80;
    psh->irq = Irq;
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,50)
    psh->base = io_port;
#else
    psh->base = (char*)io_port;
#endif  
    psh->unique_id = io_port;
    psh->dma_channel = -1;
    psh->last_reset = jiffies;
        
    pACB = (PACB) psh->hostdata;
    DC390_LOCKA_INIT;
    DC390_LOCK_ACB;

    pACB->pScsiHost = psh;
    pACB->IOPortBase = (USHORT) io_port;
    pACB->IRQLevel = Irq;

    DEBUG0(printk (KERN_INFO "DC390: Adapter index %i, ID %i, IO 0x%08x, IRQ 0x%02x\n", \
            index, psh->this_id, (int)io_port, Irq);)
   
    psh->max_id = 8;

    if( psh->max_id - 1 == dc390_eepromBuf[index][EE_ADAPT_SCSI_ID] )
        psh->max_id--;
    psh->max_lun = 1;
    if( dc390_eepromBuf[index][EE_MODE2] & LUN_CHECK )
        psh->max_lun = 8;

    pACB->pLinkDCB = NULL;
    pACB->pDCBRunRobin = NULL;
    pACB->pActiveDCB = NULL;
    pACB->pFreeSRB = pACB->SRB_array;
    pACB->SRBCount = MAX_SRB_CNT;
    pACB->QueryCnt = 0;
    pACB->pQueryHead = NULL;
    pACB->AdapterIndex = index;
    pACB->status = 0;
    psh->this_id = dc390_eepromBuf[index][EE_ADAPT_SCSI_ID];
    pACB->DeviceCnt = 0;
    pACB->DCBCnt = 0;
    pACB->TagMaxNum = 2 << dc390_eepromBuf[index][EE_TAG_CMD_NUM];
    pACB->ACBFlag = 0;
    pACB->scan_devices = 1;
    pACB->MsgLen = 0;
    pACB->Ignore_IRQ = 0;
    pACB->Gmode2 = dc390_eepromBuf[index][EE_MODE2];
    dc390_linkSRB( pACB );
    pACB->pTmpSRB = &pACB->TmpSRB;
    dc390_initSRB( pACB->pTmpSRB );
    for(i=0; i<MAX_SCSI_ID; i++)
        pACB->DCBmap[i] = 0;
    pACB->sel_timeout = SEL_TIMEOUT;
    pACB->glitch_cfg = EATER_25NS;
    pACB->Cmds = pACB->CmdInQ = pACB->CmdOutOfSRB = 0;
    pACB->SelLost = pACB->SelConn = 0;
    init_timer (&pACB->Waiting_Timer);
}


/***********************************************************************
 * Function : static int dc390_initAdapter ()
 *
 * Purpose :  initialize the SCSI chip ctrl registers
 *
 * Inputs : psh - pointer to this host adapter's structure
 *          io_port, Irq, index: Resources
 *
 * Outputs: 0 on success, -1 on error
 ***********************************************************************/

int __init dc390_initAdapter (PSH psh, ULONG io_port, UCHAR Irq, UCHAR index)
{
    PACB   pACB, pACB2;
    UCHAR  dstate;
    int    i;
    
    pACB = (PACB) psh->hostdata;
    
    if (check_region (io_port, psh->n_io_port))
        {
            printk(KERN_ERR "DC390: register IO ports error!\n");
            return( -1 );
        }
    else
        request_region (io_port, psh->n_io_port, "tmscsim");

    DC390_read8_ (INT_Status, io_port);         /* Reset Pending INT */

    if( (i = request_irq(Irq, do_DC390_Interrupt, DC390_IRQ, "tmscsim", pACB) ))
      {
        printk(KERN_ERR "DC390: register IRQ error!\n");
        release_region (io_port, psh->n_io_port);
        return( -1 );
      }

    if( !dc390_pACB_start )
      {
        pACB2 = NULL;
        dc390_pACB_start = pACB;
        dc390_pACB_current = pACB;
        pACB->pNextACB = NULL;
      }
    else
      {
        pACB2 = dc390_pACB_current;
        dc390_pACB_current->pNextACB = pACB;
        dc390_pACB_current = pACB;
        pACB->pNextACB = NULL;
      };

    DC390_write8 (CtrlReg1, DIS_INT_ON_SCSI_RST | psh->this_id);        /* Disable SCSI bus reset interrupt */

    if (pACB->Gmode2 & RST_SCSI_BUS)
    {
        dc390_ResetSCSIBus( pACB );
        udelay (1000);
        pACB->pScsiHost->last_reset = jiffies + HZ/2
                    + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
        /*
        for( i=0; i<(500 + 1000*dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY]); i++ )
                udelay(1000);
         */
    };
    pACB->ACBFlag = 0;
    DC390_read8 (INT_Status);                           /* Reset Pending INT */
    
    DC390_write8 (Scsi_TimeOut, SEL_TIMEOUT);           /* 250ms selection timeout */
    DC390_write8 (Clk_Factor, CLK_FREQ_40MHZ);          /* Conversion factor = 0 , 40MHz clock */
    DC390_write8 (ScsiCmd, NOP_CMD);                    /* NOP cmd - clear command register */
    DC390_write8 (CtrlReg2, EN_FEATURE+EN_SCSI2_CMD);   /* Enable Feature and SCSI-2 */
    DC390_write8 (CtrlReg3, FAST_CLK);                  /* fast clock */
    DC390_write8 (CtrlReg4, pACB->glitch_cfg |                  /* glitch eater */
                (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION) ? NEGATE_REQACKDATA : 0);  /* Negation */
    DC390_write8 (CtcReg_High, 0);                      /* Clear Transfer Count High: ID */
    DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
    DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
    dstate = DC390_read8 (DMA_Status);
    DC390_write8 (DMA_Status, dstate);  /* clear */

    return(0);
}


/***********************************************************************
 * Function : static int DC390_init (struct Scsi_Host *host, ...)
 *
 * Purpose :  initialize the internal structures for a given SCSI host
 *
 * Inputs : host - pointer to this host adapter's structure
 *          io_port - IO ports mapped to this adapter
 *          Irq - IRQ assigned to this adpater
 *          PDEVDECL - PCI access handle
 *          index - Adapter index
 *
 * Outputs: 0 on success, -1 on error
 *
 * Note: written in capitals, because the locking is only done here,
 *      not in DC390_detect, called from outside 
 ***********************************************************************/

static int __init DC390_init (PSHT psht, ULONG io_port, UCHAR Irq, PDEVDECL, UCHAR index)
{
    PSH   psh;
    PACB  pACB;
    DC390_AFLAGS
    
    if (dc390_CheckEEpromCheckSum (PDEV, index))
    {
#ifdef CONFIG_SCSI_DC390T_NOGENSUPP
        printk (KERN_ERR "DC390_init: No EEPROM found!\n");
        return( -1 );
#else
        int speed;
        dc390_adapname = "AM53C974";
        printk (KERN_INFO "DC390_init: No EEPROM found! Trying default settings ...\n");
        dc390_check_for_safe_settings ();
        dc390_fill_with_defaults ();
        dc390_EEprom_Override (index);
        speed = dc390_clock_speed[tmscsim[1]];
        printk (KERN_INFO "DC390: Used defaults: AdaptID=%i, SpeedIdx=%i (%i.%i MHz),"
                " DevMode=0x%02x, AdaptMode=0x%02x, TaggedCmnds=%i (%i), DelayReset=%is\n", 
                tmscsim[0], tmscsim[1], speed/10, speed%10,
                (UCHAR)tmscsim[2], (UCHAR)tmscsim[3], tmscsim[4], 2 << (tmscsim[4]), tmscsim[5]);
#endif
    }
    else
    {
        dc390_check_for_safe_settings ();
        dc390_EEprom_Override (index);
    }
   
    psh = scsi_register( psht, sizeof(DC390_ACB) );
    if( !psh ) return( -1 );
        
    pACB = (PACB) psh->hostdata;
    DC390_LOCKA_INIT;
    DC390_LOCK_ACB;

#if 0
    if( !dc390_pSH_start )
    {
        dc390_pSH_start = psh;
        dc390_pSH_current = psh;
    }
    else
    {
        dc390_pSH_current->next = psh;
        dc390_pSH_current = psh;
    }
#endif

    DEBUG0(printk(KERN_INFO "DC390: pSH = %8x,", (UINT) psh);)
    DEBUG0(printk(" Index %02i,", index);)

    dc390_initACB( psh, io_port, Irq, index );
    pACB = (PACB) psh->hostdata;
        
    PDEVSET;

    if( !dc390_initAdapter( psh, io_port, Irq, index ) )
    {
        DEBUG0(printk("\nDC390: pACB = %8x, pDCBmap = %8x, pSRB_array = %8x\n",\
                (UINT) pACB, (UINT) pACB->DCBmap, (UINT) pACB->SRB_array);)
        DEBUG0(printk("DC390: ACB size= %4x, DCB size= %4x, SRB size= %4x\n",\
                sizeof(DC390_ACB), sizeof(DC390_DCB), sizeof(DC390_SRB) );)

        DC390_UNLOCK_ACB;
        return (0);
    }
    else
    {
        //dc390_pSH_start = NULL;
        scsi_unregister( psh );
        DC390_UNLOCK_ACB;
        return( -1 );
    }
}


/***********************************************************************
 * Function : int DC390_detect(Scsi_Host_Template *psht)
 *
 * Purpose : detects and initializes AMD53C974 SCSI chips
 *           that were autoprobed, overridden on the LILO command line,
 *           or specified at compile time.
 *
 * Inputs : psht - template for this SCSI adapter
 *
 * Returns : number of host adapters detected
 *
 ***********************************************************************/

#ifndef NEW_PCI
/* Acc. to PCI 2.1 spec it's up to the driver to enable Bus mastering:
 * We use pci_set_master () for 2.1.x and this func for 2.0.x:  */
static void __init dc390_set_master (PDEVDECL)
{
        USHORT cmd;
        UCHAR lat;
        
        PCI_READ_CONFIG_WORD (PDEV, PCI_COMMAND, &cmd);
        
        if (! (cmd & PCI_COMMAND_MASTER)) {     
                printk("PCI: Enabling bus mastering for device %02x:%02x\n",
                       PCI_BUS_DEV);
                cmd |= PCI_COMMAND_MASTER;
                PCI_WRITE_CONFIG_WORD(PDEV, PCI_COMMAND, cmd);
        }
        PCI_READ_CONFIG_BYTE (PDEV, PCI_LATENCY_TIMER, &lat);
        if (lat < 16 /* || lat == 255 */) {
                printk("PCI: Setting latency timer of device %02x:%02x from %i to 64\n",
                       PCI_BUS_DEV, lat);
                PCI_WRITE_CONFIG_BYTE(PDEV, PCI_LATENCY_TIMER, 64);
        }
        
};
#endif /* ! NEW_PCI */

static void __init dc390_set_pci_cfg (PDEVDECL)
{
        USHORT cmd;
        PCI_READ_CONFIG_WORD (PDEV, PCI_COMMAND, &cmd);
        cmd |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY | PCI_COMMAND_IO;
        PCI_WRITE_CONFIG_WORD (PDEV, PCI_COMMAND, cmd);
        PCI_WRITE_CONFIG_WORD (PDEV, PCI_STATUS, (PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY));
};
        

int __init DC390_detect (Scsi_Host_Template *psht)
{
    PDEVDECL0;
    UCHAR   irq;
    UINT    io_port;
    //DC390_IFLAGS
    DC390_DFLAGS

    DC390_LOCK_DRV;
    //dc390_pSHT_start = psht;
    dc390_pACB_start = NULL;

    if ( PCI_PRESENT )
        while (PCI_FIND_DEVICE (PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD53C974))
        {
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,30)
            if (pci_enable_device (pdev))
                continue;
#endif
            //DC390_LOCK_IO;            /* Remove this when going to new eh */
            PCI_GET_IO_AND_IRQ;
            DEBUG0(printk(KERN_INFO "DC390(%i): IO_PORT=%04x,IRQ=%x\n", dc390_adapterCnt, (UINT) io_port, irq);)

            if( !DC390_init(psht, io_port, irq, PDEV, dc390_adapterCnt))
            {
                PCI_SET_MASTER;
                dc390_set_pci_cfg (PDEV);
                dc390_adapterCnt++;
            };
            //DC390_UNLOCK_IO;          /* Remove when going to new eh */
        }
    else
        printk (KERN_ERR "DC390: No PCI BIOS found!\n");
   
    if (dc390_adapterCnt)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,30)
        psht->proc_name = "tmscsim";
#else
        psht->proc_dir = &DC390_proc_scsi_tmscsim;
#endif
    printk(KERN_INFO "DC390: %i adapters found\n", dc390_adapterCnt);
    DC390_UNLOCK_DRV;
    return( dc390_adapterCnt );
}


/***********************************************************************
 * Functions: dc390_inquiry(), dc390_inquiry_done()
 *
 * Purpose: When changing speed etc., we have to issue an INQUIRY
 *          command to make sure, we agree upon the nego parameters
 *          with the device
 ***********************************************************************/

static void dc390_inquiry_done (Scsi_Cmnd* cmd)
{
   printk (KERN_INFO "DC390: INQUIRY (ID %02x LUN %02x) returned %08x\n",
           cmd->target, cmd->lun, cmd->result);
   if (cmd->result)
   {
        PACB pACB = (PACB)cmd->host->hostdata;
        PDCB pDCB = dc390_findDCB (pACB, cmd->target, cmd->lun);
        printk ("DC390: Unsetting DsCn, Sync and TagQ!\n");
        if (pDCB)
        {
                pDCB->DevMode &= ~(SYNC_NEGO_ | TAG_QUEUEING_ | EN_DISCONNECT_ );
                dc390_updateDCB (pACB, pDCB);
        };
   };
   kfree (cmd);
};

void dc390_inquiry (PACB pACB, PDCB pDCB)
{
   char* buffer;
   Scsi_Cmnd* cmd;
   cmd = kmalloc (sizeof(Scsi_Cmnd) + 256, GFP_ATOMIC);
   if (!cmd) { printk ("DC390: kmalloc failed in inquiry!\n"); return; };
   buffer = (char*)cmd + sizeof(Scsi_Cmnd);

   memset (cmd, 0, sizeof(Scsi_Cmnd) + 256);
   cmd->cmnd[0] = INQUIRY;
   cmd->cmnd[1] = (pDCB->TargetLUN << 5) & 0xe0;
   cmd->cmnd[4] = 0xff;
   
   cmd->cmd_len = 6; cmd->old_cmd_len = 6;
   cmd->host = pACB->pScsiHost;
   cmd->target = pDCB->TargetID;
   cmd->lun = pDCB->TargetLUN; 
   cmd->serial_number = 1;
   cmd->pid = 390;
   cmd->bufflen = 128;
   cmd->buffer = buffer;
   cmd->request_bufflen = 128;
   cmd->request_buffer = &buffer[128];
   cmd->done = dc390_inquiry_done;
   cmd->scsi_done = dc390_inquiry_done;
   cmd->timeout_per_command = HZ;

   cmd->request.rq_status = RQ_SCSI_BUSY;

   pDCB->SyncMode &= ~SYNC_NEGO_DONE;
   printk (KERN_INFO "DC390: Queue INQUIRY command to dev ID %02x LUN %02x\n",
           pDCB->TargetID, pDCB->TargetLUN);
   DC390_queue_command (cmd, dc390_inquiry_done);
};

/***********************************************************************
 * Functions: dc390_sendstart(), dc390_sendstart_done()
 *
 * Purpose: When changing speed etc., we have to issue an INQUIRY
 *          command to make sure, we agree upon the nego parameters
 *          with the device
 ***********************************************************************/

static void dc390_sendstart_done (Scsi_Cmnd* cmd)
{
   printk (KERN_INFO "DC390: SENDSTART (ID %02x LUN %02x) returned %08x\n",
           cmd->target, cmd->lun, cmd->result);
   kfree (cmd);
};

void dc390_sendstart (PACB pACB, PDCB pDCB)
{
   char* buffer;
   Scsi_Cmnd* cmd;
   cmd = kmalloc (sizeof(Scsi_Cmnd) + 256, GFP_ATOMIC);
   if (!cmd) { printk ("DC390: kmalloc failed in sendstart!\n"); return; };
   buffer = (char*)cmd + sizeof(Scsi_Cmnd);

   memset (cmd, 0, sizeof(Scsi_Cmnd) + 256);
   cmd->cmnd[0] = 0x1b; /* START_STOP_UNIT */
   cmd->cmnd[1] = (pDCB->TargetLUN << 5) & 0xe0;
   cmd->cmnd[4] = 0x01; /* START */
   
   cmd->cmd_len = 6; cmd->old_cmd_len = 6;
   cmd->host = pACB->pScsiHost;
   cmd->target = pDCB->TargetID;
   cmd->lun = pDCB->TargetLUN; 
   cmd->serial_number = 1;
   cmd->pid = 310;
   cmd->bufflen = 128;
   cmd->buffer = buffer;
   cmd->request_bufflen = 128;
   cmd->request_buffer = &buffer[128];
   cmd->done = dc390_sendstart_done;
   cmd->scsi_done = dc390_sendstart_done;
   cmd->timeout_per_command = 5*HZ;

   cmd->request.rq_status = RQ_SCSI_BUSY;

   pDCB->SyncMode &= ~SYNC_NEGO_DONE;
   printk (KERN_INFO "DC390: Queue SEND_START command to dev ID %02x LUN %02x\n",
           pDCB->TargetID, pDCB->TargetLUN);
   DC390_queue_command (cmd, dc390_sendstart_done);
};

/********************************************************************
 * Function: dc390_set_info()
 *
 * Purpose: Change adapter config
 *
 * Strings are parsed similar to the output of tmscsim_proc_info ()
 * '-' means no change
 *******************************************************************/

static int dc390_scanf (char** p1, char** p2, int* var)
{
   *p2 = *p1;
   *var = simple_strtoul (*p2, p1, 10);
   if (*p2 == *p1) return -1;
   *p1 = strtok (0, " \t\n:=,;.");
   return 0;
};

#define SCANF(p1, p2, var, min, max)            \
if (dc390_scanf (&p1, &p2, &var)) goto einv;    \
else if (var<min || var>max) goto einv2

static int dc390_yesno (char** p, char* var, char bmask)
{
   switch (**p)
     {
      case 'Y': *var |= bmask; break;
      case 'N': *var &= ~bmask; break;
      case '-': break;
      default: return -1;
     }
   *p = strtok (0, " \t\n:=,;");
   return 0;
};

#define YESNO(p, var, bmask)                    \
if (dc390_yesno (&p, &var, bmask)) goto einv;   \
else dc390_updateDCB (pACB, pDCB);              \
if (!p) goto ok

static int dc390_search (char **p1, char **p2, char *var, char* txt, int max, int scale, char* ign)
{
   int dum;
   if (! memcmp (*p1, txt, strlen(txt)))
     {
        *p2 = strtok (0, " \t\n:=,;");
        if (!*p2) return -1;
        dum = simple_strtoul (*p2, p1, 10);
        if (*p2 == *p1) return -1;
        if (dum >= 0 && dum <= max) 
          { *var = (dum * 100) / scale; }
        else return -2;
        *p1 = strtok (0, " \t\n:=,;");
        if (*ign && *p1 && strlen(*p1) >= strlen(ign) && 
            !(memcmp (*p1, ign, strlen(ign)))) 
                *p1 = strtok (0, " \t\n:=,;");

     }
   return 0;
};

#define SEARCH(p1, p2, var, txt, max)                                           \
if (dc390_search (&p1, &p2, (PUCHAR)(&var), txt, max, 100, "")) goto einv2;     \
else if (!p1) goto ok2

#define SEARCH2(p1, p2, var, txt, max, scale)                                   \
if (dc390_search (&p1, &p2, &var, txt, max, scale, "")) goto einv2;             \
else if (!p1) goto ok2

#define SEARCH3(p1, p2, var, txt, max, scale, ign)                              \
if (dc390_search (&p1, &p2, &var, txt, max, scale, ign)) goto einv2;            \
else if (!p1) goto ok2


#ifdef DC390_PARSEDEBUG
static char _prstr[256];
char* prstr (char* p, char* e)
{
   char* c = _prstr;
   while (p < e)
     if (*p == 0) { *c++ = ':'; p++; }
     else if (*p == 10) { *c++ = '\\'; *c++ = 'n'; p++; }
     else *c++ = *p++;
   *c = 0;
   return _prstr;
};
#endif

int dc390_set_info (char *buffer, int length, PACB pACB)
{
  char *pos = buffer, *p0 = buffer;
  char needs_inquiry = 0; 
  int dum = 0;
  char dev;
  PDCB pDCB = pACB->pLinkDCB;
  DC390_IFLAGS
  DC390_AFLAGS 
  pos[length] = 0;

  DC390_LOCK_IO;
  DC390_LOCK_ACB;
  /* UPPERCASE */ 
  /* Don't use kernel toupper, because of 2.0.x bug: ctmp unexported */
  while (*pos) 
    { if (*pos >='a' && *pos <= 'z') *pos = *pos + 'A' - 'a'; pos++; };
  
  /* We should protect __strtok ! */
  /* spin_lock (strtok_lock); */

  /* Remove WS */
  pos = strtok (buffer, " \t:\n=,;");
  if (!pos) goto ok;
   
 next:
  if (!memcmp (pos, "RESET", 5)) goto reset;
  else if (!memcmp (pos, "INQUIRY", 7)) goto inquiry;
  else if (!memcmp (pos, "REMOVE", 6)) goto remove;
  else if (!memcmp (pos, "ADD", 3)) goto add;
  else if (!memcmp (pos, "START", 5)) goto start;
  else if (!memcmp (pos, "DUMP", 4)) goto dump;
  
  if (isdigit (*pos))
    {
      /* Device config line */
      int dev, id, lun; char* pdec;
      char olddevmode;
      
      SCANF (pos, p0, dev, 0, pACB->DCBCnt-1);
      if (pos) { SCANF (pos, p0, id, 0, 7); } else goto einv;
      if (pos) { SCANF (pos, p0, lun, 0, 7); } else goto einv;
      if (!pos) goto einv;
      
      PARSEDEBUG(printk (KERN_INFO "DC390: config line %i %i %i:\"%s\"\n", dev, id, lun, prstr (pos, &buffer[length]));)
      pDCB = pACB->pLinkDCB;
      for (dum = 0; dum < dev; dum++) pDCB = pDCB->pNextDCB;
      /* Sanity Check */
      if (pDCB->TargetID != id || pDCB->TargetLUN != lun) 
         {
            printk (KERN_ERR "DC390: no such device: Idx=%02i ID=%02i LUN=%02i\n",
                    dev, id, lun);
            goto einv2;
         };

      if (pDCB->pWaitingSRB || pDCB->pGoingSRB)
      {
          printk ("DC390: Cannot change dev (%i-%i) cfg: Pending requests\n",
                  pDCB->TargetID, pDCB->TargetLUN);
          goto einv;
      };
          
      olddevmode = pDCB->DevMode;
      YESNO (pos, pDCB->DevMode, PARITY_CHK_);
      needs_inquiry++;
      YESNO (pos, pDCB->DevMode, SYNC_NEGO_);
      if ((olddevmode & SYNC_NEGO_) == (pDCB->DevMode & SYNC_NEGO_)) needs_inquiry--;
      needs_inquiry++;
      YESNO (pos, pDCB->DevMode, EN_DISCONNECT_);
      if ((olddevmode & EN_DISCONNECT_) == (pDCB->DevMode & EN_DISCONNECT_)) needs_inquiry--;
      YESNO (pos, pDCB->DevMode, SEND_START_);
      needs_inquiry++;
      YESNO (pos, pDCB->DevMode, TAG_QUEUEING_);
      if ((olddevmode & TAG_QUEUEING_) == (pDCB->DevMode & TAG_QUEUEING_)) needs_inquiry--;

      dc390_updateDCB (pACB, pDCB);
      if (!pos) goto ok;
       
      olddevmode = pDCB->NegoPeriod;
      /* Look for decimal point (Speed) */
      pdec = pos; 
      while (pdec++ < &buffer[length]) if (*pdec == '.') break;
      /* NegoPeriod */
      if (*pos != '-')
        {
          SCANF (pos, p0, dum, 72, 800); 
          pDCB->NegoPeriod = dum >> 2;
          if (pDCB->NegoPeriod != olddevmode) needs_inquiry++;
          if (!pos) goto ok;
          if (memcmp (pos, "NS", 2) == 0) pos = strtok (0, " \t\n:=,;.");
        }
      else pos = strtok (0, " \t\n:=,;.");
      if (!pos) goto ok;
      
      /* Sync Speed in MHz */
      if (*pos != '-')
        {
          SCANF (pos, p0, dum, 1, 13); 
          pDCB->NegoPeriod = (1000/dum) >> 2;
          if (pDCB->NegoPeriod != olddevmode && !pos) needs_inquiry++;
          if (!pos) goto ok;
          /* decimal */
          if (pos-1 == pdec)
             {
                int dumold = dum;
                dum = simple_strtoul (pos, &p0, 10) * 10;
                for (; p0-pos > 1; p0--) dum /= 10;
                pDCB->NegoPeriod = (100000/(100*dumold + dum)) >> 2;
                if (pDCB->NegoPeriod < 19) pDCB->NegoPeriod = 19;
                pos = strtok (0, " \t\n:=,;");
                if (!pos) goto ok;
             };
          if (*pos == 'M') pos = strtok (0, " \t\n:=,;");
          if (pDCB->NegoPeriod != olddevmode) needs_inquiry++;
        }
      else pos = strtok (0, " \t\n:=,;");
      /* dc390_updateDCB (pACB, pDCB); */
      if (!pos) goto ok;

      olddevmode = pDCB->SyncOffset;
      /* SyncOffs */
      if (*pos != '-')
        {
          SCANF (pos, p0, dum, 0, 0x0f); 
          pDCB->SyncOffset = dum;
          if (pDCB->SyncOffset > olddevmode) needs_inquiry++;
        }
      else pos = strtok (0, " \t\n:=,;");
      if (!pos) goto ok;
      dc390_updateDCB (pACB, pDCB);

      //olddevmode = pDCB->MaxCommand;
      /* MaxCommand (Tags) */
      if (*pos != '-')
        {
          SCANF (pos, p0, dum, 1, 32 /*pACB->TagMaxNum*/);
          if (pDCB->SyncMode & EN_TAG_QUEUEING)
                pDCB->MaxCommand = dum;
          else printk (KERN_INFO "DC390: Can't set MaxCmd larger than one without Tag Queueing!\n");
        }
      else pos = strtok (0, " \t\n:=,;");

    }
  else
    {
      char* p1 = pos; UCHAR dum, newadaptid;
      PARSEDEBUG(printk (KERN_INFO "DC390: chg adapt cfg \"%s\"\n", prstr (pos, &buffer[length]));)
      dum = GLITCH_TO_NS (pACB->glitch_cfg);
      /* Adapter setting */
      SEARCH (pos, p0, pACB->pScsiHost->max_id, "MAXID", 8); 
      SEARCH (pos, p0, pACB->pScsiHost->max_lun, "MAXLUN", 8); 
      SEARCH (pos, p0, newadaptid, "ADAPTERID", 7);
      SEARCH (pos, p0, pACB->TagMaxNum, "TAGMAXNUM", 32);
      SEARCH (pos, p0, pACB->ACBFlag, "ACBFLAG", 255);
      SEARCH3 (pos, p0, dum, "GLITCHEATER", 40, 1000, "NS");
      SEARCH3 (pos, p0, pACB->sel_timeout, "SELTIMEOUT", 400, 163, "MS");
      SEARCH3 (pos, p0, dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY], "DELAYRESET", 180, 100, "S");
    ok2:
      pACB->glitch_cfg = NS_TO_GLITCH (dum);
      if (pACB->sel_timeout < 60) pACB->sel_timeout = 60;
      DC390_write8 (Scsi_TimeOut, pACB->sel_timeout);
      if (newadaptid != pACB->pScsiHost->this_id)
      {
        pACB->pScsiHost->this_id = newadaptid;
        dc390_ResetDevParam (pACB);
      }     
      //dum = 0; while (1 << dum <= pACB->TagMaxNum) dum ++;
      //pACB->TagMaxNum &= (1 << --dum);
      dc390_updateDCBs (pACB);
      // All devs should be INQUIRED now
      if (pos == p1) goto einv;
    }
  if (pos) goto next;
      
 ok:
  /* spin_unlock (strtok_lock); */
  DC390_UNLOCK_ACB;
  if (needs_inquiry) 
     { dc390_updateDCB (pACB, pDCB); dc390_inquiry (pACB, pDCB); };
  DC390_UNLOCK_IO;
  return (length);

 einv2:
  pos = p0;
 einv:
  /* spin_unlock (strtok_lock); */
  DC390_UNLOCK_ACB;
  DC390_UNLOCK_IO;
  printk (KERN_WARNING "DC390: parse error near \"%s\"\n", (pos? pos: "NULL"));
  return (-EINVAL);
   
 reset:
     {
        Scsi_Cmnd cmd; cmd.host = pACB->pScsiHost;
        printk (KERN_WARNING "DC390: Driver reset requested!\n");
        DC390_UNLOCK_ACB;
        DC390_reset (&cmd, 0);
        DC390_UNLOCK_IO;
     };
  return (length);

 dump:
     {
        dc390_dumpinfo (pACB, 0, 0);
        DC390_UNLOCK_ACB;
        DC390_UNLOCK_IO;       
     }
  return (length);
        
 inquiry:
     {
        pos = strtok (0, " \t\n.:;="); if (!pos) goto einv;
        dev = simple_strtoul (pos, &p0, 10);
        if (dev >= pACB->DCBCnt) goto einv_dev;
        for (dum = 0; dum < dev; dum++) pDCB = pDCB->pNextDCB;
        printk (KERN_NOTICE " DC390: Issue INQUIRY command to Dev(Idx) %i SCSI ID %i LUN %i\n",
                dev, pDCB->TargetID, pDCB->TargetLUN);
        DC390_UNLOCK_ACB;
        dc390_inquiry (pACB, pDCB);
        DC390_UNLOCK_IO;
     };
   return (length);

 remove:
     {
        pos = strtok (0, " \t\n.:;="); if (!pos) goto einv;
        dev = simple_strtoul (pos, &p0, 10);
        if (dev >= pACB->DCBCnt) goto einv_dev;
        for (dum = 0; dum < dev; dum++) pDCB = pDCB->pNextDCB;
        printk (KERN_NOTICE " DC390: Remove DCB for Dev(Idx) %i SCSI ID %i LUN %i\n",
                dev, pDCB->TargetID, pDCB->TargetLUN);
        /* TO DO: We should make sure no pending commands are left */
        dc390_remove_dev (pACB, pDCB);
        DC390_UNLOCK_ACB;
        DC390_UNLOCK_IO;
     };
   return (length);

 add:
     {
        int id, lun;
        pos = strtok (0, " \t\n.:;=");
        if (pos) { SCANF (pos, p0, id, 0, 7); } else goto einv;
        if (pos) { SCANF (pos, p0, lun, 0, 7); } else goto einv;
        pDCB = dc390_findDCB (pACB, id, lun);
        if (pDCB) { printk ("DC390: ADD: Device already existing\n"); goto einv; };
        dc390_initDCB (pACB, &pDCB, id, lun);
        DC390_UNLOCK_ACB;
        dc390_inquiry (pACB, pDCB);
        DC390_UNLOCK_IO;
     };
   return (length);

 start:
     {
        int id, lun;
        pos = strtok (0, " \t\n.:;=");
        if (pos) { SCANF (pos, p0, id, 0, 7); } else goto einv;
        if (pos) { SCANF (pos, p0, lun, 0, 7); } else goto einv;
        pDCB = dc390_findDCB (pACB, id, lun);
        if (pDCB) printk ("DC390: SendStart: Device already existing ...\n");
        else dc390_initDCB (pACB, &pDCB, id, lun);
        DC390_UNLOCK_ACB;
        dc390_sendstart (pACB, pDCB);
        dc390_inquiry (pACB, pDCB);
        DC390_UNLOCK_IO;
     };
   return (length);

 einv_dev:
   printk (KERN_WARNING "DC390: Ignore cmnd to illegal Dev(Idx) %i. Valid range: 0 - %i.\n", 
           dev, pACB->DCBCnt - 1);
   DC390_UNLOCK_ACB;
   DC390_UNLOCK_IO;
   return (-EINVAL);
             
             
}

#undef SEARCH
#undef YESNO
#undef SCANF

/********************************************************************
 * Function: DC390_proc_info(char* buffer, char **start,
 *                           off_t offset, int length, int hostno, int inout)
 *
 * Purpose: return SCSI Adapter/Device Info
 *
 * Input: buffer: Pointer to a buffer where to write info
 *        start :
 *        offset:
 *        hostno: Host adapter index
 *        inout : Read (=0) or set(!=0) info
 *
 * Output: buffer: contains info
 *         length; length of info in buffer
 *
 * return value: length
 *
 ********************************************************************/

#undef SPRINTF
#define SPRINTF(args...) pos += sprintf(pos, ## args)

#define YESNO(YN)               \
 if (YN) SPRINTF(" Yes ");      \
 else SPRINTF(" No  ")


int DC390_proc_info (char *buffer, char **start,
                     off_t offset, int length, int hostno, int inout)
{
  int dev, spd, spd1;
  char *pos = buffer;
  PSH shpnt;
  PACB pACB;
  PDCB pDCB;
  PSCSICMD pcmd;
  DC390_AFLAGS

  pACB = dc390_pACB_start;

  while(pACB != (PACB)-1)
     {
        shpnt = pACB->pScsiHost;
        if (shpnt->host_no == hostno) break;
        pACB = pACB->pNextACB;
     }

  if (pACB == (PACB)-1) return(-ESRCH);
  if(!shpnt) return(-ESRCH);

  if(inout) /* Has data been written to the file ? */
      return dc390_set_info(buffer, length, pACB);
   
  SPRINTF("Tekram DC390/AM53C974 PCI SCSI Host Adapter, ");
  SPRINTF("Driver Version %s\n", DC390_VERSION);

  DC390_LOCK_ACB;

  SPRINTF("SCSI Host Nr %i, ", shpnt->host_no);
  SPRINTF("%s Adapter Nr %i\n", dc390_adapname, pACB->AdapterIndex);
  SPRINTF("IOPortBase 0x%04x, ", pACB->IOPortBase);
  SPRINTF("IRQ %02i\n", pACB->IRQLevel);

  SPRINTF("MaxID %i, MaxLUN %i, ", shpnt->max_id, shpnt->max_lun);
  SPRINTF("AdapterID %i, SelTimeout %i ms, DelayReset %i s\n", 
          shpnt->this_id, (pACB->sel_timeout*164)/100,
          dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY]);

  SPRINTF("TagMaxNum %i, Status 0x%02x, ACBFlag 0x%02x, GlitchEater %i ns\n",
          pACB->TagMaxNum, pACB->status, pACB->ACBFlag, GLITCH_TO_NS(pACB->glitch_cfg)*12);

  SPRINTF("Statistics: Cmnds %li, Cmnds not sent directly %i, Out of SRB conds %i\n",
          pACB->Cmds, pACB->CmdInQ, pACB->CmdOutOfSRB);
  SPRINTF("            Lost arbitrations %i, Sel. connected %i, Connected: %s\n", 
          pACB->SelLost, pACB->SelConn, pACB->Connected? "Yes": "No");
   
  SPRINTF("Nr of attached devices: %i, Nr of DCBs: %i\n", pACB->DeviceCnt, pACB->DCBCnt);
  SPRINTF("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
          pACB->DCBmap[0], pACB->DCBmap[1], pACB->DCBmap[2], pACB->DCBmap[3], 
          pACB->DCBmap[4], pACB->DCBmap[5], pACB->DCBmap[6], pACB->DCBmap[7]);

  SPRINTF("Idx ID LUN Prty Sync DsCn SndS TagQ NegoPeriod SyncSpeed SyncOffs MaxCmd\n");

  pDCB = pACB->pLinkDCB;
  for (dev = 0; dev < pACB->DCBCnt; dev++)
     {
      SPRINTF("%02i  %02i  %02i ", dev, pDCB->TargetID, pDCB->TargetLUN);
      YESNO(pDCB->DevMode & PARITY_CHK_);
      YESNO(pDCB->SyncMode & SYNC_NEGO_DONE);
      YESNO(pDCB->DevMode & EN_DISCONNECT_);
      YESNO(pDCB->DevMode & SEND_START_);
      YESNO(pDCB->SyncMode & EN_TAG_QUEUEING);
      if (pDCB->SyncOffset & 0x0f)
      {
         int sp = pDCB->SyncPeriod; if (! (pDCB->CtrlR3 & FAST_SCSI)) sp++;
         SPRINTF("  %03i ns ", (pDCB->NegoPeriod) << 2);
         spd = 40/(sp); spd1 = 40%(sp);
         spd1 = (spd1 * 10 + sp/2) / (sp);
         SPRINTF("   %2i.%1i M      %02i", spd, spd1, (pDCB->SyncOffset & 0x0f));
      }
      else SPRINTF(" (%03i ns)                 ", (pDCB->NegoPeriod) << 2);
      /* Add more info ...*/
      SPRINTF ("      %02i\n", pDCB->MaxCommand);
      pDCB = pDCB->pNextDCB;
     }
    SPRINTF ("Commands in Queues: Query: %li:", pACB->QueryCnt);
    for (pcmd = pACB->pQueryHead; pcmd; pcmd = pcmd->next)
        SPRINTF (" %li", pcmd->pid);
    if (timer_pending(&pACB->Waiting_Timer)) SPRINTF ("Waiting queue timer running\n");
    else SPRINTF ("\n");
    pDCB = pACB->pLinkDCB;
        
    for (dev = 0; dev < pACB->DCBCnt; dev++)
    {
        PSRB pSRB;
        if (pDCB->WaitSRBCnt) 
                    SPRINTF ("DCB (%02i-%i): Waiting: %i:", pDCB->TargetID, pDCB->TargetLUN,
                             pDCB->WaitSRBCnt);
        for (pSRB = pDCB->pWaitingSRB; pSRB; pSRB = pSRB->pNextSRB)
                SPRINTF(" %li", pSRB->pcmd->pid);
        if (pDCB->GoingSRBCnt) 
                    SPRINTF ("\nDCB (%02i-%i): Going  : %i:", pDCB->TargetID, pDCB->TargetLUN,
                             pDCB->GoingSRBCnt);
        for (pSRB = pDCB->pGoingSRB; pSRB; pSRB = pSRB->pNextSRB)
#if 0 //def DC390_DEBUGTRACE
                SPRINTF(" %s\n  ", pSRB->debugtrace);
#else
                SPRINTF(" %li", pSRB->pcmd->pid);
#endif
        if (pDCB->WaitSRBCnt || pDCB->GoingSRBCnt) SPRINTF ("\n");
        pDCB = pDCB->pNextDCB;
    }
        
#ifdef DC390_DEBUGDCB
    SPRINTF ("DCB list for ACB %p:\n", pACB);
    pDCB = pACB->pLinkDCB;
    SPRINTF ("%p", pDCB);
    for (dev = 0; dev < pACB->DCBCnt; dev++, pDCB=pDCB->pNextDCB)
        SPRINTF ("->%p", pDCB->pNextDCB);
    SPRINTF("\n");
#endif
  

  DC390_UNLOCK_ACB;
  *start = buffer + offset;

  if (pos - buffer < offset)
    return 0;
  else if (pos - buffer - offset < length)
    return pos - buffer - offset;
  else
    return length;
}

#undef YESNO
#undef SPRINTF

#ifdef MODULE

/***********************************************************************
 * Function : static int dc390_shutdown (struct Scsi_Host *host)
 *
 * Purpose : does a clean (we hope) shutdown of the SCSI chip.
 *           Use prior to dumping core, unloading the driver, etc.
 *
 * Returns : 0 on success
 ***********************************************************************/
static int dc390_shutdown (struct Scsi_Host *host)
{
    UCHAR    bval;
    PACB pACB = (PACB)(host->hostdata);
   
/*  pACB->soft_reset(host); */

    printk(KERN_INFO "DC390: shutdown\n");

    pACB->ACBFlag = RESET_DEV;
    bval = DC390_read8 (CtrlReg1);
    bval |= DIS_INT_ON_SCSI_RST;
    DC390_write8 (CtrlReg1, bval);      /* disable interrupt */
    if (pACB->Gmode2 & RST_SCSI_BUS)
                dc390_ResetSCSIBus (pACB);

    if (timer_pending (&pACB->Waiting_Timer)) del_timer (&pACB->Waiting_Timer);
    return( 0 );
}

void dc390_freeDCBs (struct Scsi_Host *host)
{
    PDCB pDCB, nDCB;
    PACB pACB = (PACB)(host->hostdata);
    
    pDCB = pACB->pLinkDCB;
    if (!pDCB) return;
    do
    {
        nDCB = pDCB->pNextDCB;
        DCBDEBUG(printk (KERN_INFO "DC390: Free DCB (ID %i, LUN %i): %p\n",\
                pDCB->TargetID, pDCB->TargetLUN, pDCB);)
        //kfree (pDCB);
        dc390_remove_dev (pACB, pDCB);
        pDCB = nDCB;
    } while (pDCB && pACB->pLinkDCB);

};

int DC390_release (struct Scsi_Host *host)
{
    DC390_AFLAGS DC390_IFLAGS
    PACB pACB = (PACB)(host->hostdata);

    DC390_LOCK_IO;
    DC390_LOCK_ACB;

    /* TO DO: We should check for outstanding commands first. */
    dc390_shutdown (host);

    if (host->irq != IRQ_NONE)
    {
        DEBUG0(printk(KERN_INFO "DC390: Free IRQ %i\n",host->irq);)
        free_irq (host->irq, pACB);
    }

    release_region(host->io_port,host->n_io_port);
    dc390_freeDCBs (host);
    DC390_UNLOCK_ACB;
    DC390_UNLOCK_IO;
    return( 1 );
}
#endif /* def MODULE */

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,99)
static Scsi_Host_Template driver_template = DC390_T;
#include "scsi_module.c"
#elif defined(MODULE)
Scsi_Host_Template driver_template = DC390_T;
#include "scsi_module.c"
#endif