linux/drivers/scsi/tmscsim.c
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   1/************************************************************************
   2 *      FILE NAME : TMSCSIM.C                                           *
   3 *           BY   : C.L. Huang,  ching@tekram.com.tw                    *
   4 *      Description: Device Driver for Tekram DC-390(T) PCI SCSI        *
   5 *                   Bus Master Host Adapter                            *
   6 * (C)Copyright 1995-1996 Tekram Technology Co., Ltd.                   *
   7 ************************************************************************
   8 * (C) Copyright: put under GNU GPL in 10/96                            *
   9 *                              (see Documentation/scsi/tmscsim.txt)    *
  10 ************************************************************************
  11 * $Id: tmscsim.c,v 2.60.2.30 2000/12/20 01:07:12 garloff Exp $         *
  12 *      Enhancements and bugfixes by                                    *
  13 *      Kurt Garloff <kurt@garloff.de>  <garloff@suse.de>               *
  14 ************************************************************************
  15 *      HISTORY:                                                        *
  16 *                                                                      *
  17 *      REV#    DATE    NAME    DESCRIPTION                             *
  18 *      1.00  96/04/24  CLH     First release                           *
  19 *      1.01  96/06/12  CLH     Fixed bug of Media Change for Removable *
  20 *                              Device, scan all LUN. Support Pre2.0.10 *
  21 *      1.02  96/06/18  CLH     Fixed bug of Command timeout ...        *
  22 *      1.03  96/09/25  KG      Added tmscsim_proc_info()               *
  23 *      1.04  96/10/11  CLH     Updating for support KV 2.0.x           *
  24 *      1.05  96/10/18  KG      Fixed bug in DC390_abort(null ptr deref)*
  25 *      1.06  96/10/25  KG      Fixed module support                    *
  26 *      1.07  96/11/09  KG      Fixed tmscsim_proc_info()               *
  27 *      1.08  96/11/18  KG      Fixed null ptr in DC390_Disconnect()    *
  28 *      1.09  96/11/30  KG      Added register the allocated IO space   *
  29 *      1.10  96/12/05  CLH     Modified tmscsim_proc_info(), and reset *
  30 *                              pending interrupt in DC390_detect()     *
  31 *      1.11  97/02/05  KG/CLH  Fixeds problem with partitions greater  *
  32 *                              than 1GB                                *
  33 *      1.12  98/02/15  MJ      Rewritten PCI probing                   *
  34 *      1.13  98/04/08  KG      Support for non DC390, __initfunc decls,*
  35 *                              changed max devs from 10 to 16          *
  36 *      1.14a 98/05/05  KG      Dynamic DCB allocation, add-single-dev  *
  37 *                              for LUNs if LUN_SCAN (BIOS) not set     *
  38 *                              runtime config using /proc interface    *
  39 *      1.14b 98/05/06  KG      eliminated cli (); sti (); spinlocks    *
  40 *      1.14c 98/05/07  KG      2.0.x compatibility                     *
  41 *      1.20a 98/05/07  KG      changed names of funcs to be consistent *
  42 *                              DC390_ (entry points), dc390_ (internal)*
  43 *                              reworked locking                        *
  44 *      1.20b 98/05/12  KG      bugs: version, kfree, _ctmp             *
  45 *                              debug output                            *
  46 *      1.20c 98/05/12  KG      bugs: kfree, parsing, EEpromDefaults    *
  47 *      1.20d 98/05/14  KG      bugs: list linkage, clear flag after    *
  48 *                              reset on startup, code cleanup          *
  49 *      1.20e 98/05/15  KG      spinlock comments, name space cleanup   *
  50 *                              pLastDCB now part of ACB structure      *
  51 *                              added stats, timeout for 2.1, TagQ bug  *
  52 *                              RESET and INQUIRY interface commands    *
  53 *      1.20f 98/05/18  KG      spinlocks fixes, max_lun fix, free DCBs *
  54 *                              for missing LUNs, pending int           *
  55 *      1.20g 98/05/19  KG      Clean up: Avoid short                   *
  56 *      1.20h 98/05/21  KG      Remove AdaptSCSIID, max_lun ...         *
  57 *      1.20i 98/05/21  KG      Aiiie: Bug with TagQMask                *
  58 *      1.20j 98/05/24  KG      Handle STAT_BUSY, handle pACB->pLinkDCB *
  59 *                              == 0 in remove_dev and DoingSRB_Done    *
  60 *      1.20k 98/05/25  KG      DMA_INT (experimental)                  *
  61 *      1.20l 98/05/27  KG      remove DMA_INT; DMA_IDLE cmds added;    *
  62 *      1.20m 98/06/10  KG      glitch configurable; made some global   *
  63 *                              vars part of ACB; use DC390_readX       *
  64 *      1.20n 98/06/11  KG      startup params                          *
  65 *      1.20o 98/06/15  KG      added TagMaxNum to boot/module params   *
  66 *                              Device Nr -> Idx, TagMaxNum power of 2  *
  67 *      1.20p 98/06/17  KG      Docu updates. Reset depends on settings *
  68 *                              pci_set_master added; 2.0.xx: pcibios_* *
  69 *                              used instead of MechNum things ...      *
  70 *      1.20q 98/06/23  KG      Changed defaults. Added debug code for  *
  71 *                              removable media and fixed it. TagMaxNum *
  72 *                              fixed for DC390. Locking: ACB, DRV for  *
  73 *                              better IRQ sharing. Spelling: Queueing  *
  74 *                              Parsing and glitch_cfg changes. Display *
  75 *                              real SyncSpeed value. Made DisConn      *
  76 *                              functional (!)                          *
  77 *      1.20r 98/06/30  KG      Debug macros, allow disabling DsCn, set *
  78 *                              BIT4 in CtrlR4, EN_PAGE_INT, 2.0 module *
  79 *                              param -1 fixed.                         *
  80 *      1.20s 98/08/20  KG      Debug info on abort(), try to check PCI,*
  81 *                              phys_to_bus instead of phys_to_virt,    *
  82 *                              fixed sel. process, fixed locking,      *
  83 *                              added MODULE_XXX infos, changed IRQ     *
  84 *                              request flags, disable DMA_INT          *
  85 *      1.20t 98/09/07  KG      TagQ report fixed; Write Erase DMA Stat;*
  86 *                              initfunc -> __init; better abort;       *
  87 *                              Timeout for XFER_DONE & BLAST_COMPLETE; *
  88 *                              Allow up to 33 commands being processed *
  89 *      2.0a  98/10/14  KG      Max Cmnds back to 17. DMA_Stat clearing *
  90 *                              all flags. Clear within while() loops   *
  91 *                              in DataIn_0/Out_0. Null ptr in dumpinfo *
  92 *                              for pSRB==0. Better locking during init.*
  93 *                              bios_param() now respects part. table.  *
  94 *      2.0b  98/10/24  KG      Docu fixes. Timeout Msg in DMA Blast.   *
  95 *                              Disallow illegal idx in INQUIRY/REMOVE  *
  96 *      2.0c  98/11/19  KG      Cleaned up detect/init for SMP boxes,   *
  97 *                              Write Erase DMA (1.20t) caused problems *
  98 *      2.0d  98/12/25  KG      Christmas release ;-) Message handling  *
  99 *                              completely reworked. Handle target ini- *
 100 *                              tiated SDTR correctly.                  *
 101 *      2.0d1 99/01/25  KG      Try to handle RESTORE_PTR               *
 102 *      2.0d2 99/02/08  KG      Check for failure of kmalloc, correct   *
 103 *                              inclusion of scsicam.h, DelayReset      *
 104 *      2.0d3 99/05/31  KG      DRIVER_OK -> DID_OK, DID_NO_CONNECT,    *
 105 *                              detect Target mode and warn.            *
 106 *                              pcmd->result handling cleaned up.       *
 107 *      2.0d4 99/06/01  KG      Cleaned selection process. Found bug    *
 108 *                              which prevented more than 16 tags. Now: *
 109 *                              24. SDTR cleanup. Cleaner multi-LUN     *
 110 *                              handling. Don't modify ControlRegs/FIFO *
 111 *                              when connected.                         *
 112 *      2.0d5 99/06/01  KG      Clear DevID, Fix INQUIRY after cfg chg. *
 113 *      2.0d6 99/06/02  KG      Added ADD special command to allow cfg. *
 114 *                              before detection. Reset SYNC_NEGO_DONE  *
 115 *                              after a bus reset.                      *
 116 *      2.0d7 99/06/03  KG      Fixed bugs wrt add,remove commands      *
 117 *      2.0d8 99/06/04  KG      Removed copying of cmnd into CmdBlock.  *
 118 *                              Fixed Oops in _release().               *
 119 *      2.0d9 99/06/06  KG      Also tag queue INQUIRY, T_U_R, ...      *
 120 *                              Allow arb. no. of Tagged Cmnds. Max 32  *
 121 *      2.0d1099/06/20  KG      TagMaxNo changes now honoured! Queueing *
 122 *                              clearified (renamed ..) TagMask handling*
 123 *                              cleaned.                                *
 124 *      2.0d1199/06/28  KG      cmd->result now identical to 2.0d2      *
 125 *      2.0d1299/07/04  KG      Changed order of processing in IRQ      *
 126 *      2.0d1399/07/05  KG      Don't update DCB fields if removed      *
 127 *      2.0d1499/07/05  KG      remove_dev: Move kfree() to the end     *
 128 *      2.0d1599/07/12  KG      use_new_eh_code: 0, ULONG -> UINT where *
 129 *                              appropriate                             *
 130 *      2.0d1699/07/13  KG      Reenable StartSCSI interrupt, Retry msg *
 131 *      2.0d1799/07/15  KG      Remove debug msg. Disable recfg. when   *
 132 *                              there are queued cmnds                  *
 133 *      2.0d1899/07/18  KG      Selection timeout: Don't requeue        *
 134 *      2.0d1999/07/18  KG      Abort: Only call scsi_done if dequeued  *
 135 *      2.0d2099/07/19  KG      Rst_Detect: DoingSRB_Done               *
 136 *      2.0d2199/08/15  KG      dev_id for request/free_irq, cmnd[0] for*
 137 *                              RETRY, SRBdone does DID_ABORT for the   *
 138 *                              cmd passed by DC390_reset()             *
 139 *      2.0d2299/08/25  KG      dev_id fixed. can_queue: 42             *
 140 *      2.0d2399/08/25  KG      Removed some debugging code. dev_id     *
 141 *                              now is set to pACB. Use u8,u16,u32.     *
 142 *      2.0d2499/11/14  KG      Unreg. I/O if failed IRQ alloc. Call    *
 143 *                              done () w/ DID_BAD_TARGET in case of    *
 144 *                              missing DCB. We are old EH!!            *
 145 *      2.0d2500/01/15  KG      2.3.3x compat from Andreas Schultz      *
 146 *                              set unique_id. Disable RETRY message.   *
 147 *      2.0d2600/01/29  KG      Go to new EH.                           *
 148 *      2.0d2700/01/31  KG      ... but maintain 2.0 compat.            *
 149 *                              and fix DCB freeing                     *
 150 *      2.0d2800/02/14  KG      Queue statistics fixed, dump special cmd*
 151 *                              Waiting_Timer for failed StartSCSI      *
 152 *                              New EH: Don't return cmnds to ML on RST *
 153 *                              Use old EH (don't have new EH fns yet)  *
 154 *                              Reset: Unlock, but refuse to queue      *
 155 *                              2.3 __setup function                    *
 156 *      2.0e  00/05/22  KG      Return residual for 2.3                 *
 157 *      2.0e1 00/05/25  KG      Compile fixes for 2.3.99                *
 158 *      2.0e2 00/05/27  KG      Jeff Garzik's pci_enable_device()       *
 159 *      2.0e3 00/09/29  KG      Some 2.4 changes. Don't try Sync Nego   *
 160 *                              before INQUIRY has reported ability.    *
 161 *                              Recognise INQUIRY as scanning command.  *
 162 *      2.0e4 00/10/13  KG      Allow compilation into 2.4 kernel       *
 163 *      2.0e5 00/11/17  KG      Store Inq.flags in DCB                  *
 164 *      2.0e6 00/11/22  KG      2.4 init function (Thx to O.Schumann)   *
 165 *                              2.4 PCI device table (Thx to A.Richter) *
 166 *      2.0e7 00/11/28  KG      Allow overriding of BIOS settings       *
 167 *      2.0f  00/12/20  KG      Handle failed INQUIRYs during scan      *
 168 *      2.1a  03/11/29  GL, KG  Initial fixing for 2.6. Convert to      *
 169 *                              use the current PCI-mapping API, update *
 170 *                              command-queuing.                        *
 171 *      2.1b  04/04/13  GL      Fix for 64-bit platforms                *
 172 *      2.1b1 04/01/31  GL      (applied 05.04) Remove internal         *
 173 *                              command-queuing.                        *
 174 *      2.1b2 04/02/01  CH      (applied 05.04) Fix error-handling      *
 175 *      2.1c  04/05/23  GL      Update to use the new pci_driver API,   *
 176 *                              some scsi EH updates, more cleanup.     *
 177 *      2.1d  04/05/27  GL      Moved setting of scan_devices to        *
 178 *                              slave_alloc/_configure/_destroy, as     *
 179 *                              suggested by CH.                        *
 180 ***********************************************************************/
 181
 182/* DEBUG options */
 183//#define DC390_DEBUG0
 184//#define DC390_DEBUG1
 185//#define DC390_DCBDEBUG
 186//#define DC390_PARSEDEBUG
 187//#define DC390_REMOVABLEDEBUG
 188//#define DC390_LOCKDEBUG
 189
 190//#define NOP do{}while(0)
 191#define C_NOP
 192
 193/* Debug definitions */
 194#ifdef DC390_DEBUG0
 195# define DEBUG0(x) x
 196#else
 197# define DEBUG0(x) C_NOP
 198#endif
 199#ifdef DC390_DEBUG1
 200# define DEBUG1(x) x
 201#else
 202# define DEBUG1(x) C_NOP
 203#endif
 204#ifdef DC390_DCBDEBUG
 205# define DCBDEBUG(x) x
 206#else
 207# define DCBDEBUG(x) C_NOP
 208#endif
 209#ifdef DC390_PARSEDEBUG
 210# define PARSEDEBUG(x) x
 211#else
 212# define PARSEDEBUG(x) C_NOP
 213#endif
 214#ifdef DC390_REMOVABLEDEBUG
 215# define REMOVABLEDEBUG(x) x
 216#else
 217# define REMOVABLEDEBUG(x) C_NOP
 218#endif
 219#define DCBDEBUG1(x) C_NOP
 220
 221#include <linux/module.h>
 222#include <linux/delay.h>
 223#include <linux/signal.h>
 224#include <linux/errno.h>
 225#include <linux/kernel.h>
 226#include <linux/ioport.h>
 227#include <linux/pci.h>
 228#include <linux/proc_fs.h>
 229#include <linux/string.h>
 230#include <linux/mm.h>
 231#include <linux/blkdev.h>
 232#include <linux/timer.h>
 233#include <linux/interrupt.h>
 234#include <linux/init.h>
 235#include <linux/spinlock.h>
 236#include <asm/io.h>
 237
 238#include <scsi/scsi.h>
 239#include <scsi/scsi_cmnd.h>
 240#include <scsi/scsi_device.h>
 241#include <scsi/scsi_host.h>
 242#include <scsi/scsicam.h>
 243#include <scsi/scsi_tcq.h>
 244
 245
 246#define DC390_BANNER "Tekram DC390/AM53C974"
 247#define DC390_VERSION "2.1d 2004-05-27"
 248
 249#define PCI_DEVICE_ID_AMD53C974         PCI_DEVICE_ID_AMD_SCSI
 250
 251#include "tmscsim.h"
 252
 253
 254static void dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 255static void dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 256static void dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 257static void dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 258static void dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 259static void dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 260static void dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 261static void dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 262static void dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 263static void dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 264static void dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 265static void dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 266static void dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 267static void dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 268
 269static void dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB );
 270static void dc390_Disconnect( struct dc390_acb* pACB );
 271static void dc390_Reselect( struct dc390_acb* pACB );
 272static void dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB );
 273static void dc390_ScsiRstDetect( struct dc390_acb* pACB );
 274static void dc390_EnableMsgOut_Abort(struct dc390_acb*, struct dc390_srb*);
 275static void dc390_dumpinfo(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB);
 276static void dc390_ResetDevParam(struct dc390_acb* pACB);
 277
 278static u32      dc390_laststatus = 0;
 279static u8       dc390_adapterCnt = 0;
 280
 281static int disable_clustering;
 282module_param(disable_clustering, int, S_IRUGO);
 283MODULE_PARM_DESC(disable_clustering, "If you experience problems with your devices, try setting to 1");
 284
 285/* Startup values, to be overriden on the commandline */
 286static int tmscsim[] = {-2, -2, -2, -2, -2, -2};
 287
 288module_param_array(tmscsim, int, NULL, 0);
 289MODULE_PARM_DESC(tmscsim, "Host SCSI ID, Speed (0=10MHz), Device Flags, Adapter Flags, Max Tags (log2(tags)-1), DelayReset (s)");
 290MODULE_AUTHOR("C.L. Huang / Kurt Garloff");
 291MODULE_DESCRIPTION("SCSI host adapter driver for Tekram DC390 and other AMD53C974A based PCI SCSI adapters");
 292MODULE_LICENSE("GPL");
 293MODULE_SUPPORTED_DEVICE("sd,sr,sg,st");
 294
 295static void *dc390_phase0[]={
 296       dc390_DataOut_0,
 297       dc390_DataIn_0,
 298       dc390_Command_0,
 299       dc390_Status_0,
 300       dc390_Nop_0,
 301       dc390_Nop_0,
 302       dc390_MsgOut_0,
 303       dc390_MsgIn_0,
 304       dc390_Nop_1
 305       };
 306
 307static void *dc390_phase1[]={
 308       dc390_DataOutPhase,
 309       dc390_DataInPhase,
 310       dc390_CommandPhase,
 311       dc390_StatusPhase,
 312       dc390_Nop_0,
 313       dc390_Nop_0,
 314       dc390_MsgOutPhase,
 315       dc390_MsgInPhase,
 316       dc390_Nop_1
 317       };
 318
 319#ifdef DC390_DEBUG1
 320static char* dc390_p0_str[] = {
 321       "dc390_DataOut_0",
 322       "dc390_DataIn_0",
 323       "dc390_Command_0",
 324       "dc390_Status_0",
 325       "dc390_Nop_0",
 326       "dc390_Nop_0",
 327       "dc390_MsgOut_0",
 328       "dc390_MsgIn_0",
 329       "dc390_Nop_1"
 330       };
 331     
 332static char* dc390_p1_str[] = {
 333       "dc390_DataOutPhase",
 334       "dc390_DataInPhase",
 335       "dc390_CommandPhase",
 336       "dc390_StatusPhase",
 337       "dc390_Nop_0",
 338       "dc390_Nop_0",
 339       "dc390_MsgOutPhase",
 340       "dc390_MsgInPhase",
 341       "dc390_Nop_1"
 342       };
 343#endif   
 344
 345static u8  dc390_eepromBuf[MAX_ADAPTER_NUM][EE_LEN];
 346static u8  dc390_clock_period1[] = {4, 5, 6, 7, 8, 10, 13, 20};
 347static u8  dc390_clock_speed[] = {100,80,67,57,50, 40, 31, 20};
 348
 349/***********************************************************************
 350 * Functions for the management of the internal structures 
 351 * (DCBs, SRBs, Queueing)
 352 *
 353 **********************************************************************/
 354static void inline dc390_start_segment(struct dc390_srb* pSRB)
 355{
 356        struct scatterlist *psgl = pSRB->pSegmentList;
 357
 358        /* start new sg segment */
 359        pSRB->SGBusAddr = sg_dma_address(psgl);
 360        pSRB->SGToBeXferLen = sg_dma_len(psgl);
 361}
 362
 363static unsigned long inline dc390_advance_segment(struct dc390_srb* pSRB, u32 residue)
 364{
 365        unsigned long xfer = pSRB->SGToBeXferLen - residue;
 366
 367        /* xfer more bytes transferred */
 368        pSRB->SGBusAddr += xfer;
 369        pSRB->TotalXferredLen += xfer;
 370        pSRB->SGToBeXferLen = residue;
 371
 372        return xfer;
 373}
 374
 375static struct dc390_dcb __inline__ *dc390_findDCB ( struct dc390_acb* pACB, u8 id, u8 lun)
 376{
 377   struct dc390_dcb* pDCB = pACB->pLinkDCB; if (!pDCB) return NULL;
 378   while (pDCB->TargetID != id || pDCB->TargetLUN != lun)
 379     {
 380        pDCB = pDCB->pNextDCB;
 381        if (pDCB == pACB->pLinkDCB)
 382             return NULL;
 383     }
 384   DCBDEBUG1( printk (KERN_DEBUG "DCB %p (%02x,%02x) found.\n", \
 385                      pDCB, pDCB->TargetID, pDCB->TargetLUN));
 386   return pDCB;
 387}
 388
 389/* Insert SRB oin top of free list */
 390static __inline__ void dc390_Free_insert (struct dc390_acb* pACB, struct dc390_srb* pSRB)
 391{
 392    DEBUG0(printk ("DC390: Free SRB %p\n", pSRB));
 393    pSRB->pNextSRB = pACB->pFreeSRB;
 394    pACB->pFreeSRB = pSRB;
 395}
 396
 397static __inline__ void dc390_Going_append (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 398{
 399    pDCB->GoingSRBCnt++;
 400    DEBUG0(printk("DC390: Append SRB %p to Going\n", pSRB));
 401    /* Append to the list of Going commands */
 402    if( pDCB->pGoingSRB )
 403        pDCB->pGoingLast->pNextSRB = pSRB;
 404    else
 405        pDCB->pGoingSRB = pSRB;
 406
 407    pDCB->pGoingLast = pSRB;
 408    /* No next one in sent list */
 409    pSRB->pNextSRB = NULL;
 410}
 411
 412static __inline__ void dc390_Going_remove (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 413{
 414        DEBUG0(printk("DC390: Remove SRB %p from Going\n", pSRB));
 415   if (pSRB == pDCB->pGoingSRB)
 416        pDCB->pGoingSRB = pSRB->pNextSRB;
 417   else
 418     {
 419        struct dc390_srb* psrb = pDCB->pGoingSRB;
 420        while (psrb && psrb->pNextSRB != pSRB)
 421          psrb = psrb->pNextSRB;
 422        if (!psrb) 
 423          { printk (KERN_ERR "DC390: Remove non-ex. SRB %p from Going!\n", pSRB); return; }
 424        psrb->pNextSRB = pSRB->pNextSRB;
 425        if (pSRB == pDCB->pGoingLast)
 426          pDCB->pGoingLast = psrb;
 427     }
 428   pDCB->GoingSRBCnt--;
 429}
 430
 431static struct scatterlist* dc390_sg_build_single(struct scatterlist *sg, void *addr, unsigned int length)
 432{
 433        sg_init_one(sg, addr, length);
 434        return sg;
 435}
 436
 437/* Create pci mapping */
 438static int dc390_pci_map (struct dc390_srb* pSRB)
 439{
 440        int error = 0;
 441        struct scsi_cmnd *pcmd = pSRB->pcmd;
 442        struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
 443        dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp));
 444
 445        /* Map sense buffer */
 446        if (pSRB->SRBFlag & AUTO_REQSENSE) {
 447                pSRB->pSegmentList      = dc390_sg_build_single(&pSRB->Segmentx, pcmd->sense_buffer, sizeof(pcmd->sense_buffer));
 448                pSRB->SGcount           = pci_map_sg(pdev, pSRB->pSegmentList, 1,
 449                                                     DMA_FROM_DEVICE);
 450                cmdp->saved_dma_handle  = sg_dma_address(pSRB->pSegmentList);
 451
 452                /* TODO: error handling */
 453                if (pSRB->SGcount != 1)
 454                        error = 1;
 455                DEBUG1(printk("%s(): Mapped sense buffer %p at %x\n", __FUNCTION__, pcmd->sense_buffer, cmdp->saved_dma_handle));
 456        /* Map SG list */
 457        } else if (scsi_sg_count(pcmd)) {
 458                int nseg;
 459
 460                nseg = scsi_dma_map(pcmd);
 461
 462                pSRB->pSegmentList      = scsi_sglist(pcmd);
 463                pSRB->SGcount           = nseg;
 464
 465                /* TODO: error handling */
 466                if (nseg < 0)
 467                        error = 1;
 468                DEBUG1(printk("%s(): Mapped SG %p with %d (%d) elements\n",\
 469                              __FUNCTION__, scsi_sglist(pcmd), nseg, scsi_sg_count(pcmd)));
 470        /* Map single segment */
 471        } else
 472                pSRB->SGcount = 0;
 473
 474        return error;
 475}
 476
 477/* Remove pci mapping */
 478static void dc390_pci_unmap (struct dc390_srb* pSRB)
 479{
 480        struct scsi_cmnd *pcmd = pSRB->pcmd;
 481        struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
 482        DEBUG1(dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp)));
 483
 484        if (pSRB->SRBFlag) {
 485                pci_unmap_sg(pdev, &pSRB->Segmentx, 1, DMA_FROM_DEVICE);
 486                DEBUG1(printk("%s(): Unmapped sense buffer at %x\n", __FUNCTION__, cmdp->saved_dma_handle));
 487        } else {
 488                scsi_dma_unmap(pcmd);
 489                DEBUG1(printk("%s(): Unmapped SG at %p with %d elements\n",
 490                              __FUNCTION__, scsi_sglist(pcmd), scsi_sg_count(pcmd)));
 491        }
 492}
 493
 494static void __inline__
 495dc390_freetag (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 496{
 497        if (pSRB->TagNumber != SCSI_NO_TAG) {
 498                pDCB->TagMask &= ~(1 << pSRB->TagNumber);   /* free tag mask */
 499                pSRB->TagNumber = SCSI_NO_TAG;
 500        }
 501}
 502
 503
 504static int
 505dc390_StartSCSI( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
 506{
 507    struct scsi_cmnd *scmd = pSRB->pcmd;
 508    struct scsi_device *sdev = scmd->device;
 509    u8 cmd, disc_allowed, try_sync_nego;
 510    char tag[2];
 511
 512    pSRB->ScsiPhase = SCSI_NOP0;
 513
 514    if (pACB->Connected)
 515    {
 516        // Should not happen normally
 517        printk (KERN_WARNING "DC390: Can't select when connected! (%08x,%02x)\n",
 518                pSRB->SRBState, pSRB->SRBFlag);
 519        pSRB->SRBState = SRB_READY;
 520        pACB->SelConn++;
 521        return 1;
 522    }
 523    if (time_before (jiffies, pACB->pScsiHost->last_reset))
 524    {
 525        DEBUG0(printk ("DC390: We were just reset and don't accept commands yet!\n"));
 526        return 1;
 527    }
 528    /* KG: Moved pci mapping here */
 529    dc390_pci_map(pSRB);
 530    /* TODO: error handling */
 531    DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
 532    DC390_write8 (Sync_Period, pDCB->SyncPeriod);
 533    DC390_write8 (Sync_Offset, pDCB->SyncOffset);
 534    DC390_write8 (CtrlReg1, pDCB->CtrlR1);
 535    DC390_write8 (CtrlReg3, pDCB->CtrlR3);
 536    DC390_write8 (CtrlReg4, pDCB->CtrlR4);
 537    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);             /* Flush FIFO */
 538    DEBUG1(printk (KERN_INFO "DC390: Start SCSI command: %02x (Sync:%02x)\n",\
 539            scmd->cmnd[0], pDCB->SyncMode));
 540
 541    /* Don't disconnect on AUTO_REQSENSE, cause it might be an
 542     * Contingent Allegiance Condition (6.6), where no tags should be used.
 543     * All other have to be allowed to disconnect to prevent Incorrect 
 544     * Initiator Connection (6.8.2/6.5.2) */
 545    /* Changed KG, 99/06/06 */
 546    if (! (pSRB->SRBFlag & AUTO_REQSENSE))
 547        disc_allowed = pDCB->DevMode & EN_DISCONNECT_;
 548    else
 549        disc_allowed = 0;
 550
 551    if ((pDCB->SyncMode & SYNC_ENABLE) && pDCB->TargetLUN == 0 && sdev->sdtr &&
 552        (((scmd->cmnd[0] == REQUEST_SENSE || (pSRB->SRBFlag & AUTO_REQSENSE)) &&
 553          !(pDCB->SyncMode & SYNC_NEGO_DONE)) || scmd->cmnd[0] == INQUIRY))
 554      try_sync_nego = 1;
 555    else
 556      try_sync_nego = 0;
 557
 558    pSRB->MsgCnt = 0;
 559    cmd = SEL_W_ATN;
 560    DC390_write8 (ScsiFifo, IDENTIFY(disc_allowed, pDCB->TargetLUN));
 561    /* Change 99/05/31: Don't use tags when not disconnecting (BUSY) */
 562    if ((pDCB->SyncMode & EN_TAG_QUEUEING) && disc_allowed && scsi_populate_tag_msg(scmd, tag)) {
 563        DC390_write8(ScsiFifo, tag[0]);
 564        pDCB->TagMask |= 1 << tag[1];
 565        pSRB->TagNumber = tag[1];
 566        DC390_write8(ScsiFifo, tag[1]);
 567        DEBUG1(printk(KERN_INFO "DC390: Select w/DisCn for Cmd %li (SRB %p), block tag %02x\n", scmd->serial_number, pSRB, tag[1]));
 568        cmd = SEL_W_ATN3;
 569    } else {
 570        /* No TagQ */
 571//no_tag:
 572        DEBUG1(printk(KERN_INFO "DC390: Select w%s/DisCn for Cmd %li (SRB %p), No TagQ\n", disc_allowed ? "" : "o", scmd->serial_number, pSRB));
 573    }
 574
 575    pSRB->SRBState = SRB_START_;
 576
 577    if (try_sync_nego)
 578      { 
 579        u8 Sync_Off = pDCB->SyncOffset;
 580        DEBUG0(printk (KERN_INFO "DC390: NEW Sync Nego code triggered (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN));
 581        pSRB->MsgOutBuf[0] = EXTENDED_MESSAGE;
 582        pSRB->MsgOutBuf[1] = 3;
 583        pSRB->MsgOutBuf[2] = EXTENDED_SDTR;
 584        pSRB->MsgOutBuf[3] = pDCB->NegoPeriod;
 585        if (!(Sync_Off & 0x0f)) Sync_Off = SYNC_NEGO_OFFSET;
 586        pSRB->MsgOutBuf[4] = Sync_Off;
 587        pSRB->MsgCnt = 5;
 588        //pSRB->SRBState = SRB_MSGOUT_;
 589        pSRB->SRBState |= DO_SYNC_NEGO;
 590        cmd = SEL_W_ATN_STOP;
 591      }
 592
 593    /* Command is written in CommandPhase, if SEL_W_ATN_STOP ... */
 594    if (cmd != SEL_W_ATN_STOP)
 595      {
 596        if( pSRB->SRBFlag & AUTO_REQSENSE )
 597          {
 598            DC390_write8 (ScsiFifo, REQUEST_SENSE);
 599            DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
 600            DC390_write8 (ScsiFifo, 0);
 601            DC390_write8 (ScsiFifo, 0);
 602            DC390_write8 (ScsiFifo, sizeof(scmd->sense_buffer));
 603            DC390_write8 (ScsiFifo, 0);
 604            DEBUG1(printk (KERN_DEBUG "DC390: AutoReqSense !\n"));
 605          }
 606        else    /* write cmnd to bus */ 
 607          {
 608            u8 *ptr; u8 i;
 609            ptr = (u8 *)scmd->cmnd;
 610            for (i = 0; i < scmd->cmd_len; i++)
 611              DC390_write8 (ScsiFifo, *(ptr++));
 612          }
 613      }
 614    DEBUG0(if (pACB->pActiveDCB)        \
 615           printk (KERN_WARNING "DC390: ActiveDCB != 0\n"));
 616    DEBUG0(if (pDCB->pActiveSRB)        \
 617           printk (KERN_WARNING "DC390: ActiveSRB != 0\n"));
 618    //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
 619    if (DC390_read8 (Scsi_Status) & INTERRUPT)
 620    {
 621        dc390_freetag (pDCB, pSRB);
 622        DEBUG0(printk ("DC390: Interrupt during Start SCSI (pid %li, target %02i-%02i)\n",
 623                scmd->serial_number, scmd->device->id, scmd->device->lun));
 624        pSRB->SRBState = SRB_READY;
 625        //DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 626        pACB->SelLost++;
 627        return 1;
 628    }
 629    DC390_write8 (ScsiCmd, cmd);
 630    pACB->pActiveDCB = pDCB;
 631    pDCB->pActiveSRB = pSRB;
 632    pACB->Connected = 1;
 633    pSRB->ScsiPhase = SCSI_NOP1;
 634    return 0;
 635}
 636
 637
 638static void __inline__
 639dc390_InvalidCmd(struct dc390_acb* pACB)
 640{
 641        if (pACB->pActiveDCB->pActiveSRB->SRBState & (SRB_START_ | SRB_MSGOUT))
 642                DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
 643}
 644
 645
 646static irqreturn_t __inline__
 647DC390_Interrupt(void *dev_id)
 648{
 649    struct dc390_acb *pACB = dev_id;
 650    struct dc390_dcb *pDCB;
 651    struct dc390_srb *pSRB;
 652    u8  sstatus=0;
 653    u8  phase;
 654    void   (*stateV)( struct dc390_acb*, struct dc390_srb*, u8 *);
 655    u8  istate, istatus;
 656
 657    sstatus = DC390_read8 (Scsi_Status);
 658    if( !(sstatus & INTERRUPT) )
 659        return IRQ_NONE;
 660
 661    DEBUG1(printk (KERN_DEBUG "sstatus=%02x,", sstatus));
 662
 663    //DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
 664    //dstatus = DC390_read8 (DMA_Status);
 665    //DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
 666
 667    spin_lock_irq(pACB->pScsiHost->host_lock);
 668
 669    istate = DC390_read8 (Intern_State);
 670    istatus = DC390_read8 (INT_Status); /* This clears Scsi_Status, Intern_State and INT_Status ! */
 671
 672    DEBUG1(printk (KERN_INFO "Istatus(Res,Inv,Dis,Serv,Succ,ReS,SelA,Sel)=%02x,",istatus));
 673    dc390_laststatus &= ~0x00ffffff;
 674    dc390_laststatus |= /* dstatus<<24 | */ sstatus<<16 | istate<<8 | istatus;
 675
 676    if (sstatus & ILLEGAL_OP_ERR)
 677    {
 678        printk ("DC390: Illegal Operation detected (%08x)!\n", dc390_laststatus);
 679        dc390_dumpinfo (pACB, pACB->pActiveDCB, pACB->pActiveDCB->pActiveSRB);
 680    }
 681        
 682    else if (istatus &  INVALID_CMD)
 683    {
 684        printk ("DC390: Invalid Command detected (%08x)!\n", dc390_laststatus);
 685        dc390_InvalidCmd( pACB );
 686        goto unlock;
 687    }
 688
 689    if (istatus &  SCSI_RESET)
 690    {
 691        dc390_ScsiRstDetect( pACB );
 692        goto unlock;
 693    }
 694
 695    if (istatus &  DISCONNECTED)
 696    {
 697        dc390_Disconnect( pACB );
 698        goto unlock;
 699    }
 700
 701    if (istatus &  RESELECTED)
 702    {
 703        dc390_Reselect( pACB );
 704        goto unlock;
 705    }
 706
 707    else if (istatus & (SELECTED | SEL_ATTENTION))
 708    {
 709        printk (KERN_ERR "DC390: Target mode not supported!\n");
 710        goto unlock;
 711    }
 712
 713    if (istatus & (SUCCESSFUL_OP|SERVICE_REQUEST) )
 714    {
 715        pDCB = pACB->pActiveDCB;
 716        if (!pDCB)
 717        {
 718                printk (KERN_ERR "DC390: Suc. op/ Serv. req: pActiveDCB = 0!\n");
 719                goto unlock;
 720        }
 721        pSRB = pDCB->pActiveSRB;
 722        if( pDCB->DCBFlag & ABORT_DEV_ )
 723          dc390_EnableMsgOut_Abort (pACB, pSRB);
 724
 725        phase = pSRB->ScsiPhase;
 726        DEBUG1(printk (KERN_INFO "DC390: [%i]%s(0) (%02x)\n", phase, dc390_p0_str[phase], sstatus));
 727        stateV = (void *) dc390_phase0[phase];
 728        ( *stateV )( pACB, pSRB, &sstatus );
 729
 730        pSRB->ScsiPhase = sstatus & 7;
 731        phase = (u8) sstatus & 7;
 732        DEBUG1(printk (KERN_INFO "DC390: [%i]%s(1) (%02x)\n", phase, dc390_p1_str[phase], sstatus));
 733        stateV = (void *) dc390_phase1[phase];
 734        ( *stateV )( pACB, pSRB, &sstatus );
 735    }
 736
 737 unlock:
 738    spin_unlock_irq(pACB->pScsiHost->host_lock);
 739    return IRQ_HANDLED;
 740}
 741
 742static irqreturn_t do_DC390_Interrupt(int irq, void *dev_id)
 743{
 744    irqreturn_t ret;
 745    DEBUG1(printk (KERN_INFO "DC390: Irq (%i) caught: ", irq));
 746    /* Locking is done in DC390_Interrupt */
 747    ret = DC390_Interrupt(dev_id);
 748    DEBUG1(printk (".. IRQ returned\n"));
 749    return ret;
 750}
 751
 752static void
 753dc390_DataOut_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 754{
 755    u8   sstatus;
 756    u32  ResidCnt;
 757    u8   dstate = 0;
 758
 759    sstatus = *psstatus;
 760
 761    if( !(pSRB->SRBState & SRB_XFERPAD) )
 762    {
 763        if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR) )
 764            pSRB->SRBStatus |= PARITY_ERROR;
 765
 766        if( sstatus & COUNT_2_ZERO )
 767        {
 768            unsigned long timeout = jiffies + HZ;
 769
 770            /* Function called from the ISR with the host_lock held and interrupts disabled */
 771            if (pSRB->SGToBeXferLen)
 772                while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
 773                    spin_unlock_irq(pACB->pScsiHost->host_lock);
 774                    udelay(50);
 775                    spin_lock_irq(pACB->pScsiHost->host_lock);
 776                }
 777            if (!time_before(jiffies, timeout))
 778                printk (KERN_CRIT "DC390: Deadlock in DataOut_0: DMA aborted unfinished: %06x bytes remain!!\n",
 779                        DC390_read32 (DMA_Wk_ByteCntr));
 780            dc390_laststatus &= ~0xff000000;
 781            dc390_laststatus |= dstate << 24;
 782            pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
 783            pSRB->SGIndex++;
 784            if( pSRB->SGIndex < pSRB->SGcount )
 785            {
 786                pSRB->pSegmentList++;
 787
 788                dc390_start_segment(pSRB);
 789            }
 790            else
 791                pSRB->SGToBeXferLen = 0;
 792        }
 793        else
 794        {
 795            ResidCnt = ((u32) DC390_read8 (Current_Fifo) & 0x1f) +
 796                    (((u32) DC390_read8 (CtcReg_High) << 16) |
 797                     ((u32) DC390_read8 (CtcReg_Mid) << 8) |
 798                     (u32) DC390_read8 (CtcReg_Low));
 799
 800            dc390_advance_segment(pSRB, ResidCnt);
 801        }
 802    }
 803    if ((*psstatus & 7) != SCSI_DATA_OUT)
 804    {
 805            DC390_write8 (DMA_Cmd, WRITE_DIRECTION+DMA_IDLE_CMD);
 806            DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 807    }       
 808}
 809
 810static void
 811dc390_DataIn_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 812{
 813    u8   sstatus, residual, bval;
 814    u32  ResidCnt, i;
 815    unsigned long   xferCnt;
 816
 817    sstatus = *psstatus;
 818
 819    if( !(pSRB->SRBState & SRB_XFERPAD) )
 820    {
 821        if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR))
 822            pSRB->SRBStatus |= PARITY_ERROR;
 823
 824        if( sstatus & COUNT_2_ZERO )
 825        {
 826            int dstate = 0;
 827            unsigned long timeout = jiffies + HZ;
 828
 829            /* Function called from the ISR with the host_lock held and interrupts disabled */
 830            if (pSRB->SGToBeXferLen)
 831                while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
 832                    spin_unlock_irq(pACB->pScsiHost->host_lock);
 833                    udelay(50);
 834                    spin_lock_irq(pACB->pScsiHost->host_lock);
 835                }
 836            if (!time_before(jiffies, timeout)) {
 837                printk (KERN_CRIT "DC390: Deadlock in DataIn_0: DMA aborted unfinished: %06x bytes remain!!\n",
 838                        DC390_read32 (DMA_Wk_ByteCntr));
 839                printk (KERN_CRIT "DC390: DataIn_0: DMA State: %i\n", dstate);
 840            }
 841            dc390_laststatus &= ~0xff000000;
 842            dc390_laststatus |= dstate << 24;
 843            DEBUG1(ResidCnt = ((unsigned long) DC390_read8 (CtcReg_High) << 16) \
 844                + ((unsigned long) DC390_read8 (CtcReg_Mid) << 8)               \
 845                + ((unsigned long) DC390_read8 (CtcReg_Low)));
 846            DEBUG1(printk (KERN_DEBUG "Count_2_Zero (ResidCnt=%u,ToBeXfer=%lu),", ResidCnt, pSRB->SGToBeXferLen));
 847
 848            DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
 849
 850            pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
 851            pSRB->SGIndex++;
 852            if( pSRB->SGIndex < pSRB->SGcount )
 853            {
 854                pSRB->pSegmentList++;
 855
 856                dc390_start_segment(pSRB);
 857            }
 858            else
 859                pSRB->SGToBeXferLen = 0;
 860        }
 861        else    /* phase changed */
 862        {
 863            residual = 0;
 864            bval = DC390_read8 (Current_Fifo);
 865            while( bval & 0x1f )
 866            {
 867                DEBUG1(printk (KERN_DEBUG "Check for residuals,"));
 868                if( (bval & 0x1f) == 1 )
 869                {
 870                    for(i=0; i < 0x100; i++)
 871                    {
 872                        bval = DC390_read8 (Current_Fifo);
 873                        if( !(bval & 0x1f) )
 874                            goto din_1;
 875                        else if( i == 0x0ff )
 876                        {
 877                            residual = 1;   /* ;1 residual byte */
 878                            goto din_1;
 879                        }
 880                    }
 881                }
 882                else
 883                    bval = DC390_read8 (Current_Fifo);
 884            }
 885din_1:
 886            DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_BLAST_CMD);
 887            for (i = 0xa000; i; i--)
 888            {
 889                bval = DC390_read8 (DMA_Status);
 890                if (bval & BLAST_COMPLETE)
 891                    break;
 892            }
 893            /* It seems a DMA Blast abort isn't that bad ... */
 894            if (!i) printk (KERN_ERR "DC390: DMA Blast aborted unfinished!\n");
 895            //DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
 896            dc390_laststatus &= ~0xff000000;
 897            dc390_laststatus |= bval << 24;
 898
 899            DEBUG1(printk (KERN_DEBUG "Blast: Read %i times DMA_Status %02x", 0xa000-i, bval));
 900            ResidCnt = (((u32) DC390_read8 (CtcReg_High) << 16) |
 901                        ((u32) DC390_read8 (CtcReg_Mid) << 8)) |
 902                    (u32) DC390_read8 (CtcReg_Low);
 903
 904            xferCnt = dc390_advance_segment(pSRB, ResidCnt);
 905
 906            if (residual) {
 907                size_t count = 1;
 908                size_t offset = pSRB->SGBusAddr - sg_dma_address(pSRB->pSegmentList);
 909                unsigned long flags;
 910                u8 *ptr;
 911
 912                bval = DC390_read8 (ScsiFifo);      /* get one residual byte */
 913
 914                local_irq_save(flags);
 915                ptr = scsi_kmap_atomic_sg(pSRB->pSegmentList, pSRB->SGcount, &offset, &count);
 916                if (likely(ptr)) {
 917                        *(ptr + offset) = bval;
 918                        scsi_kunmap_atomic_sg(ptr);
 919                }
 920                local_irq_restore(flags);
 921                WARN_ON(!ptr);
 922
 923                /* 1 more byte read */
 924                xferCnt += dc390_advance_segment(pSRB, pSRB->SGToBeXferLen - 1);
 925            }
 926            DEBUG1(printk (KERN_DEBUG "Xfered: %lu, Total: %lu, Remaining: %lu\n", xferCnt,\
 927                           pSRB->TotalXferredLen, pSRB->SGToBeXferLen));
 928        }
 929    }
 930    if ((*psstatus & 7) != SCSI_DATA_IN)
 931    {
 932            DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 933            DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
 934    }
 935}
 936
 937static void
 938dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 939{
 940}
 941
 942static void
 943dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 944{
 945
 946    pSRB->TargetStatus = DC390_read8 (ScsiFifo);
 947    //udelay (1);
 948    pSRB->EndMessage = DC390_read8 (ScsiFifo);  /* get message */
 949
 950    *psstatus = SCSI_NOP0;
 951    pSRB->SRBState = SRB_COMPLETED;
 952    DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
 953}
 954
 955static void
 956dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 957{
 958    if( pSRB->SRBState & (SRB_UNEXPECT_RESEL+SRB_ABORT_SENT) )
 959        *psstatus = SCSI_NOP0;
 960    //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
 961}
 962
 963
 964static void __inline__
 965dc390_reprog (struct dc390_acb* pACB, struct dc390_dcb* pDCB)
 966{
 967  DC390_write8 (Sync_Period, pDCB->SyncPeriod);
 968  DC390_write8 (Sync_Offset, pDCB->SyncOffset);
 969  DC390_write8 (CtrlReg3, pDCB->CtrlR3);
 970  DC390_write8 (CtrlReg4, pDCB->CtrlR4);
 971  dc390_SetXferRate (pACB, pDCB);
 972}
 973
 974
 975#ifdef DC390_DEBUG0
 976static void
 977dc390_printMsg (u8 *MsgBuf, u8 len)
 978{
 979  int i;
 980  printk (" %02x", MsgBuf[0]);
 981  for (i = 1; i < len; i++)
 982    printk (" %02x", MsgBuf[i]);
 983  printk ("\n");
 984}
 985#endif
 986
 987#define DC390_ENABLE_MSGOUT DC390_write8 (ScsiCmd, SET_ATN_CMD)
 988
 989/* reject_msg */
 990static void __inline__
 991dc390_MsgIn_reject (struct dc390_acb* pACB, struct dc390_srb* pSRB)
 992{
 993  pSRB->MsgOutBuf[0] = MESSAGE_REJECT;
 994  pSRB->MsgCnt = 1;
 995  DC390_ENABLE_MSGOUT;
 996  DEBUG0 (printk (KERN_INFO "DC390: Reject message\n"));
 997}
 998
 999/* abort command */
1000static void
1001dc390_EnableMsgOut_Abort ( struct dc390_acb* pACB, struct dc390_srb* pSRB )
1002{
1003    pSRB->MsgOutBuf[0] = ABORT; 
1004    pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1005    pSRB->pSRBDCB->DCBFlag &= ~ABORT_DEV_;
1006}
1007
1008static struct dc390_srb*
1009dc390_MsgIn_QTag (struct dc390_acb* pACB, struct dc390_dcb* pDCB, s8 tag)
1010{
1011  struct dc390_srb* pSRB = pDCB->pGoingSRB;
1012
1013  if (pSRB)
1014    {
1015        struct scsi_cmnd *scmd = scsi_find_tag(pSRB->pcmd->device, tag);
1016        pSRB = (struct dc390_srb *)scmd->host_scribble;
1017
1018        if (pDCB->DCBFlag & ABORT_DEV_)
1019        {
1020          pSRB->SRBState = SRB_ABORT_SENT;
1021          dc390_EnableMsgOut_Abort( pACB, pSRB );
1022        }
1023
1024        if (!(pSRB->SRBState & SRB_DISCONNECT))
1025                goto mingx0;
1026
1027        pDCB->pActiveSRB = pSRB;
1028        pSRB->SRBState = SRB_DATA_XFER;
1029    }
1030  else
1031    {
1032    mingx0:
1033      pSRB = pACB->pTmpSRB;
1034      pSRB->SRBState = SRB_UNEXPECT_RESEL;
1035      pDCB->pActiveSRB = pSRB;
1036      pSRB->MsgOutBuf[0] = ABORT_TAG;
1037      pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1038    }
1039  return pSRB;
1040}
1041
1042
1043/* set async transfer mode */
1044static void 
1045dc390_MsgIn_set_async (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1046{
1047  struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1048  if (!(pSRB->SRBState & DO_SYNC_NEGO)) 
1049    printk (KERN_INFO "DC390: Target %i initiates Non-Sync?\n", pDCB->TargetID);
1050  pSRB->SRBState &= ~DO_SYNC_NEGO;
1051  pDCB->SyncMode &= ~(SYNC_ENABLE+SYNC_NEGO_DONE);
1052  pDCB->SyncPeriod = 0;
1053  pDCB->SyncOffset = 0;
1054  //pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1055  pDCB->CtrlR3 = FAST_CLK;      /* fast clock / normal scsi */
1056  pDCB->CtrlR4 &= 0x3f;
1057  pDCB->CtrlR4 |= pACB->glitch_cfg;     /* glitch eater */
1058  dc390_reprog (pACB, pDCB);
1059}
1060
1061/* set sync transfer mode */
1062static void
1063dc390_MsgIn_set_sync (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1064{
1065  u8 bval;
1066  u16 wval, wval1;
1067  struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1068  u8 oldsyncperiod = pDCB->SyncPeriod;
1069  u8 oldsyncoffset = pDCB->SyncOffset;
1070  
1071  if (!(pSRB->SRBState & DO_SYNC_NEGO))
1072    {
1073      printk (KERN_INFO "DC390: Target %i initiates Sync: %ins %i ... answer ...\n", 
1074              pDCB->TargetID, pSRB->MsgInBuf[3]<<2, pSRB->MsgInBuf[4]);
1075
1076      /* reject */
1077      //dc390_MsgIn_reject (pACB, pSRB);
1078      //return dc390_MsgIn_set_async (pACB, pSRB);
1079
1080      /* Reply with corrected SDTR Message */
1081      if (pSRB->MsgInBuf[4] > 15)
1082        { 
1083          printk (KERN_INFO "DC390: Lower Sync Offset to 15\n");
1084          pSRB->MsgInBuf[4] = 15;
1085        }
1086      if (pSRB->MsgInBuf[3] < pDCB->NegoPeriod)
1087        {
1088          printk (KERN_INFO "DC390: Set sync nego period to %ins\n", pDCB->NegoPeriod << 2);
1089          pSRB->MsgInBuf[3] = pDCB->NegoPeriod;
1090        }
1091      memcpy (pSRB->MsgOutBuf, pSRB->MsgInBuf, 5);
1092      pSRB->MsgCnt = 5;
1093      DC390_ENABLE_MSGOUT;
1094    }
1095
1096  pSRB->SRBState &= ~DO_SYNC_NEGO;
1097  pDCB->SyncMode |= SYNC_ENABLE+SYNC_NEGO_DONE;
1098  pDCB->SyncOffset &= 0x0f0;
1099  pDCB->SyncOffset |= pSRB->MsgInBuf[4];
1100  pDCB->NegoPeriod = pSRB->MsgInBuf[3];
1101
1102  wval = (u16) pSRB->MsgInBuf[3];
1103  wval = wval << 2; wval -= 3; wval1 = wval / 25;       /* compute speed */
1104  if( (wval1 * 25) != wval) wval1++;
1105  bval = FAST_CLK+FAST_SCSI;    /* fast clock / fast scsi */
1106
1107  pDCB->CtrlR4 &= 0x3f;         /* Glitch eater: 12ns less than normal */
1108  if (pACB->glitch_cfg != NS_TO_GLITCH(0))
1109    pDCB->CtrlR4 |= NS_TO_GLITCH(((GLITCH_TO_NS(pACB->glitch_cfg)) - 1));
1110  else
1111    pDCB->CtrlR4 |= NS_TO_GLITCH(0);
1112  if (wval1 < 4) pDCB->CtrlR4 |= NS_TO_GLITCH(0); /* Ultra */
1113
1114  if (wval1 >= 8)
1115    {
1116      wval1--;  /* Timing computation differs by 1 from FAST_SCSI */
1117      bval = FAST_CLK;          /* fast clock / normal scsi */
1118      pDCB->CtrlR4 |= pACB->glitch_cfg;         /* glitch eater */
1119    }
1120
1121  pDCB->CtrlR3 = bval;
1122  pDCB->SyncPeriod = (u8)wval1;
1123  
1124  if ((oldsyncperiod != wval1 || oldsyncoffset != pDCB->SyncOffset) && pDCB->TargetLUN == 0)
1125    {
1126      if (! (bval & FAST_SCSI)) wval1++;
1127      printk (KERN_INFO "DC390: Target %i: Sync transfer %i.%1i MHz, Offset %i\n", pDCB->TargetID, 
1128              40/wval1, ((40%wval1)*10+wval1/2)/wval1, pDCB->SyncOffset & 0x0f);
1129    }
1130  
1131  dc390_reprog (pACB, pDCB);
1132}
1133
1134
1135/* handle RESTORE_PTR */
1136/* This doesn't look very healthy... to-be-fixed */
1137static void 
1138dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1139{
1140    struct scsi_cmnd *pcmd = pSRB->pcmd;
1141    struct scatterlist *psgl;
1142    pSRB->TotalXferredLen = 0;
1143    pSRB->SGIndex = 0;
1144    if (scsi_sg_count(pcmd)) {
1145        size_t saved;
1146        pSRB->pSegmentList = scsi_sglist(pcmd);
1147        psgl = pSRB->pSegmentList;
1148        //dc390_pci_sync(pSRB);
1149
1150        while (pSRB->TotalXferredLen + (unsigned long) sg_dma_len(psgl) < pSRB->Saved_Ptr)
1151        {
1152            pSRB->TotalXferredLen += (unsigned long) sg_dma_len(psgl);
1153            pSRB->SGIndex++;
1154            if( pSRB->SGIndex < pSRB->SGcount )
1155            {
1156                pSRB->pSegmentList++;
1157
1158                dc390_start_segment(pSRB);
1159            }
1160            else
1161                pSRB->SGToBeXferLen = 0;
1162        }
1163
1164        saved = pSRB->Saved_Ptr - pSRB->TotalXferredLen;
1165        pSRB->SGToBeXferLen -= saved;
1166        pSRB->SGBusAddr += saved;
1167        printk (KERN_INFO "DC390: Pointer restored. Segment %i, Total %li, Bus %08lx\n",
1168                pSRB->SGIndex, pSRB->Saved_Ptr, pSRB->SGBusAddr);
1169
1170    } else {
1171         pSRB->SGcount = 0;
1172         printk (KERN_INFO "DC390: RESTORE_PTR message for Transfer without Scatter-Gather ??\n");
1173    }
1174
1175  pSRB->TotalXferredLen = pSRB->Saved_Ptr;
1176}
1177
1178
1179/* According to the docs, the AM53C974 reads the message and 
1180 * generates a Successful Operation IRQ before asserting ACK for
1181 * the last byte (how does it know whether it's the last ?) */
1182/* The old code handled it in another way, indicating, that on
1183 * every message byte an IRQ is generated and every byte has to
1184 * be manually ACKed. Hmmm ?  (KG, 98/11/28) */
1185/* The old implementation was correct. Sigh! */
1186
1187/* Check if the message is complete */
1188static u8 __inline__
1189dc390_MsgIn_complete (u8 *msgbuf, u32 len)
1190{ 
1191  if (*msgbuf == EXTENDED_MESSAGE)
1192  {
1193        if (len < 2) return 0;
1194        if (len < msgbuf[1] + 2) return 0;
1195  }
1196  else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) // two byte messages
1197        if (len < 2) return 0;
1198  return 1;
1199}
1200
1201
1202
1203/* read and eval received messages */
1204static void
1205dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1206{
1207    struct dc390_dcb*   pDCB = pACB->pActiveDCB;
1208
1209    /* Read the msg */
1210
1211    pSRB->MsgInBuf[pACB->MsgLen++] = DC390_read8 (ScsiFifo);
1212    //pSRB->SRBState = 0;
1213
1214    /* Msg complete ? */
1215    if (dc390_MsgIn_complete (pSRB->MsgInBuf, pACB->MsgLen))
1216      {
1217        DEBUG0 (printk (KERN_INFO "DC390: MsgIn:"); dc390_printMsg (pSRB->MsgInBuf, pACB->MsgLen));
1218        /* Now eval the msg */
1219        switch (pSRB->MsgInBuf[0]) 
1220          {
1221          case DISCONNECT: 
1222            pSRB->SRBState = SRB_DISCONNECT; break;
1223            
1224          case SIMPLE_QUEUE_TAG:
1225          case HEAD_OF_QUEUE_TAG:
1226          case ORDERED_QUEUE_TAG:
1227            pSRB = dc390_MsgIn_QTag (pACB, pDCB, pSRB->MsgInBuf[1]);
1228            break;
1229            
1230          case MESSAGE_REJECT: 
1231            DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1232            pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1233            if( pSRB->SRBState & DO_SYNC_NEGO)
1234              dc390_MsgIn_set_async (pACB, pSRB);
1235            break;
1236            
1237          case EXTENDED_MESSAGE:
1238            /* reject every extended msg but SDTR */
1239            if (pSRB->MsgInBuf[1] != 3 || pSRB->MsgInBuf[2] != EXTENDED_SDTR)
1240              dc390_MsgIn_reject (pACB, pSRB);
1241            else
1242              {
1243                if (pSRB->MsgInBuf[3] == 0 || pSRB->MsgInBuf[4] == 0)
1244                  dc390_MsgIn_set_async (pACB, pSRB);
1245                else
1246                  dc390_MsgIn_set_sync (pACB, pSRB);
1247              }
1248            
1249            // nothing has to be done
1250          case COMMAND_COMPLETE: break;
1251            
1252            // SAVE POINTER may be ignored as we have the struct dc390_srb* associated with the
1253            // scsi command. Thanks, Gerard, for pointing it out.
1254          case SAVE_POINTERS: 
1255            pSRB->Saved_Ptr = pSRB->TotalXferredLen;
1256            break;
1257            // The device might want to restart transfer with a RESTORE
1258          case RESTORE_POINTERS:
1259            DEBUG0(printk ("DC390: RESTORE POINTER message received ... try to handle\n"));
1260            dc390_restore_ptr (pACB, pSRB);
1261            break;
1262
1263            // reject unknown messages
1264          default: dc390_MsgIn_reject (pACB, pSRB);
1265          }
1266        
1267        /* Clear counter and MsgIn state */
1268        pSRB->SRBState &= ~SRB_MSGIN;
1269        pACB->MsgLen = 0;
1270      }
1271
1272    *psstatus = SCSI_NOP0;
1273    DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
1274    //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1275}
1276
1277
1278static void
1279dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
1280{
1281    unsigned long  lval;
1282    struct dc390_dcb*   pDCB = pACB->pActiveDCB;
1283
1284    if (pSRB == pACB->pTmpSRB)
1285    {
1286        if (pDCB)
1287                printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (%02i-%i)\n", pDCB->TargetID, pDCB->TargetLUN);
1288        else
1289                printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (DCB 0!)\n");
1290
1291        /* Try to recover - some broken disks react badly to tagged INQUIRY */
1292        if (pDCB && pACB->scan_devices && pDCB->GoingSRBCnt == 1) {
1293                pSRB = pDCB->pGoingSRB;
1294                pDCB->pActiveSRB = pSRB;
1295        } else {
1296                pSRB->pSRBDCB = pDCB;
1297                dc390_EnableMsgOut_Abort(pACB, pSRB);
1298                if (pDCB)
1299                        pDCB->DCBFlag |= ABORT_DEV;
1300                return;
1301        }
1302    }
1303
1304    if( pSRB->SGIndex < pSRB->SGcount )
1305    {
1306        DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1307        if( !pSRB->SGToBeXferLen )
1308        {
1309            dc390_start_segment(pSRB);
1310
1311            DEBUG1(printk (KERN_DEBUG " DC390: Next SG segment."));
1312        }
1313        lval = pSRB->SGToBeXferLen;
1314        DEBUG1(printk (KERN_DEBUG " DC390: Start transfer: %li bytes (address %08lx)\n", lval, pSRB->SGBusAddr));
1315        DC390_write8 (CtcReg_Low, (u8) lval);
1316        lval >>= 8;
1317        DC390_write8 (CtcReg_Mid, (u8) lval);
1318        lval >>= 8;
1319        DC390_write8 (CtcReg_High, (u8) lval);
1320
1321        DC390_write32 (DMA_XferCnt, pSRB->SGToBeXferLen);
1322        DC390_write32 (DMA_XferAddr, pSRB->SGBusAddr);
1323
1324        //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1325        pSRB->SRBState = SRB_DATA_XFER;
1326
1327        DC390_write8 (ScsiCmd, DMA_COMMAND+INFO_XFER_CMD);
1328
1329        DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1330        //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT));
1331        //DEBUG1(printk (KERN_DEBUG "DC390: DMA_Status: %02x\n", DC390_read8 (DMA_Status)));
1332        //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT));
1333    }
1334    else    /* xfer pad */
1335    {
1336        if( pSRB->SGcount )
1337        {
1338            pSRB->AdaptStatus = H_OVER_UNDER_RUN;
1339            pSRB->SRBStatus |= OVER_RUN;
1340            DEBUG0(printk (KERN_WARNING " DC390: Overrun -"));
1341        }
1342        DEBUG0(printk (KERN_WARNING " Clear transfer pad \n"));
1343        DC390_write8 (CtcReg_Low, 0);
1344        DC390_write8 (CtcReg_Mid, 0);
1345        DC390_write8 (CtcReg_High, 0);
1346
1347        pSRB->SRBState |= SRB_XFERPAD;
1348        DC390_write8 (ScsiCmd, DMA_COMMAND+XFER_PAD_BYTE);
1349/*
1350        DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1351        DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1352*/
1353    }
1354}
1355
1356
1357static void
1358dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1359{
1360    dc390_DataIO_Comm (pACB, pSRB, WRITE_DIRECTION);
1361}
1362
1363static void
1364dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1365{
1366    dc390_DataIO_Comm (pACB, pSRB, READ_DIRECTION);
1367}
1368
1369static void
1370dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1371{
1372    struct dc390_dcb*   pDCB;
1373    u8  i, cnt;
1374    u8     *ptr;
1375
1376    DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1377    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1378    if( !(pSRB->SRBFlag & AUTO_REQSENSE) )
1379    {
1380        cnt = (u8) pSRB->pcmd->cmd_len;
1381        ptr = (u8 *) pSRB->pcmd->cmnd;
1382        for(i=0; i < cnt; i++)
1383            DC390_write8 (ScsiFifo, *(ptr++));
1384    }
1385    else
1386    {
1387        DC390_write8 (ScsiFifo, REQUEST_SENSE);
1388        pDCB = pACB->pActiveDCB;
1389        DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
1390        DC390_write8 (ScsiFifo, 0);
1391        DC390_write8 (ScsiFifo, 0);
1392        DC390_write8 (ScsiFifo, sizeof(pSRB->pcmd->sense_buffer));
1393        DC390_write8 (ScsiFifo, 0);
1394        DEBUG0(printk(KERN_DEBUG "DC390: AutoReqSense (CmndPhase)!\n"));
1395    }
1396    pSRB->SRBState = SRB_COMMAND;
1397    DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1398}
1399
1400static void
1401dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1402{
1403    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1404    pSRB->SRBState = SRB_STATUS;
1405    DC390_write8 (ScsiCmd, INITIATOR_CMD_CMPLTE);
1406    //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1407}
1408
1409static void
1410dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1411{
1412    u8   bval, i, cnt;
1413    u8     *ptr;
1414    struct dc390_dcb*    pDCB;
1415
1416    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1417    pDCB = pACB->pActiveDCB;
1418    if( !(pSRB->SRBState & SRB_MSGOUT) )
1419    {
1420        cnt = pSRB->MsgCnt;
1421        if( cnt )
1422        {
1423            ptr = (u8 *) pSRB->MsgOutBuf;
1424            for(i=0; i < cnt; i++)
1425                DC390_write8 (ScsiFifo, *(ptr++));
1426            pSRB->MsgCnt = 0;
1427            if( (pDCB->DCBFlag & ABORT_DEV_) &&
1428                (pSRB->MsgOutBuf[0] == ABORT) )
1429                pSRB->SRBState = SRB_ABORT_SENT;
1430        }
1431        else
1432        {
1433            bval = ABORT;       /* ??? MSG_NOP */
1434            if( (pSRB->pcmd->cmnd[0] == INQUIRY ) ||
1435                (pSRB->pcmd->cmnd[0] == REQUEST_SENSE) ||
1436                (pSRB->SRBFlag & AUTO_REQSENSE) )
1437            {
1438                if( pDCB->SyncMode & SYNC_ENABLE )
1439                    goto  mop1;
1440            }
1441            DC390_write8 (ScsiFifo, bval);
1442        }
1443        DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1444    }
1445    else
1446    {
1447mop1:
1448        printk (KERN_ERR "DC390: OLD Sync Nego code triggered! (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN);
1449        DC390_write8 (ScsiFifo, EXTENDED_MESSAGE);
1450        DC390_write8 (ScsiFifo, 3);     /*    ;length of extended msg */
1451        DC390_write8 (ScsiFifo, EXTENDED_SDTR); /*    ; sync nego */
1452        DC390_write8 (ScsiFifo, pDCB->NegoPeriod);
1453        if (pDCB->SyncOffset & 0x0f)
1454                    DC390_write8 (ScsiFifo, pDCB->SyncOffset);
1455        else
1456                    DC390_write8 (ScsiFifo, SYNC_NEGO_OFFSET);              
1457        pSRB->SRBState |= DO_SYNC_NEGO;
1458        DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1459    }
1460}
1461
1462static void
1463dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1464{
1465    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1466    if( !(pSRB->SRBState & SRB_MSGIN) )
1467    {
1468        pSRB->SRBState &= ~SRB_DISCONNECT;
1469        pSRB->SRBState |= SRB_MSGIN;
1470    }
1471    DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1472    //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1473}
1474
1475static void
1476dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1477{
1478}
1479
1480static void
1481dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1482{
1483}
1484
1485
1486static void
1487dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB )
1488{
1489    u8  bval, i, cnt;
1490    struct dc390_dcb*   ptr;
1491
1492    if( !(pDCB->TargetLUN) )
1493    {
1494        if( !pACB->scan_devices )
1495        {
1496            ptr = pACB->pLinkDCB;
1497            cnt = pACB->DCBCnt;
1498            bval = pDCB->TargetID;
1499            for(i=0; i<cnt; i++)
1500            {
1501                if( ptr->TargetID == bval )
1502                {
1503                    ptr->SyncPeriod = pDCB->SyncPeriod;
1504                    ptr->SyncOffset = pDCB->SyncOffset;
1505                    ptr->CtrlR3 = pDCB->CtrlR3;
1506                    ptr->CtrlR4 = pDCB->CtrlR4;
1507                    ptr->SyncMode = pDCB->SyncMode;
1508                }
1509                ptr = ptr->pNextDCB;
1510            }
1511        }
1512    }
1513    return;
1514}
1515
1516
1517static void
1518dc390_Disconnect( struct dc390_acb* pACB )
1519{
1520    struct dc390_dcb *pDCB;
1521    struct dc390_srb *pSRB, *psrb;
1522    u8  i, cnt;
1523
1524    DEBUG0(printk(KERN_INFO "DISC,"));
1525
1526    if (!pACB->Connected) printk(KERN_ERR "DC390: Disconnect not-connected bus?\n");
1527    pACB->Connected = 0;
1528    pDCB = pACB->pActiveDCB;
1529    if (!pDCB)
1530     {
1531        DEBUG0(printk(KERN_ERR "ACB:%p->ActiveDCB:%p IOPort:%04x IRQ:%02x !\n",\
1532               pACB, pDCB, pACB->IOPortBase, pACB->IRQLevel));
1533        mdelay(400);
1534        DC390_read8 (INT_Status);       /* Reset Pending INT */
1535        DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1536        return;
1537     }
1538    DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1539    pSRB = pDCB->pActiveSRB;
1540    pACB->pActiveDCB = NULL;
1541    pSRB->ScsiPhase = SCSI_NOP0;
1542    if( pSRB->SRBState & SRB_UNEXPECT_RESEL )
1543        pSRB->SRBState = 0;
1544    else if( pSRB->SRBState & SRB_ABORT_SENT )
1545    {
1546        pDCB->TagMask = 0;
1547        pDCB->DCBFlag = 0;
1548        cnt = pDCB->GoingSRBCnt;
1549        pDCB->GoingSRBCnt = 0;
1550        pSRB = pDCB->pGoingSRB;
1551        for( i=0; i < cnt; i++)
1552        {
1553            psrb = pSRB->pNextSRB;
1554            dc390_Free_insert (pACB, pSRB);
1555            pSRB = psrb;
1556        }
1557        pDCB->pGoingSRB = NULL;
1558    }
1559    else
1560    {
1561        if( (pSRB->SRBState & (SRB_START_+SRB_MSGOUT)) ||
1562           !(pSRB->SRBState & (SRB_DISCONNECT+SRB_COMPLETED)) )
1563        {       /* Selection time out */
1564                pSRB->AdaptStatus = H_SEL_TIMEOUT;
1565                pSRB->TargetStatus = 0;
1566                goto  disc1;
1567        }
1568        else if (!(pSRB->SRBState & SRB_DISCONNECT) && (pSRB->SRBState & SRB_COMPLETED))
1569        {
1570disc1:
1571            dc390_freetag (pDCB, pSRB);
1572            pDCB->pActiveSRB = NULL;
1573            pSRB->SRBState = SRB_FREE;
1574            dc390_SRBdone( pACB, pDCB, pSRB);
1575        }
1576    }
1577    pACB->MsgLen = 0;
1578}
1579
1580
1581static void
1582dc390_Reselect( struct dc390_acb* pACB )
1583{
1584    struct dc390_dcb*   pDCB;
1585    struct dc390_srb*   pSRB;
1586    u8  id, lun;
1587
1588    DEBUG0(printk(KERN_INFO "RSEL,"));
1589    pACB->Connected = 1;
1590    pDCB = pACB->pActiveDCB;
1591    if( pDCB )
1592    {   /* Arbitration lost but Reselection won */
1593        DEBUG0(printk ("DC390: (ActiveDCB != 0: Arb. lost but resel. won)!\n"));
1594        pSRB = pDCB->pActiveSRB;
1595        if( !( pACB->scan_devices ) )
1596        {
1597            struct scsi_cmnd *pcmd = pSRB->pcmd;
1598            scsi_set_resid(pcmd, scsi_bufflen(pcmd));
1599            SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1600            dc390_Going_remove(pDCB, pSRB);
1601            dc390_Free_insert(pACB, pSRB);
1602            pcmd->scsi_done (pcmd);
1603            DEBUG0(printk(KERN_DEBUG"DC390: Return SRB %p to free\n", pSRB));
1604        }
1605    }
1606    /* Get ID */
1607    lun = DC390_read8 (ScsiFifo);
1608    DEBUG0(printk ("Dev %02x,", lun));
1609    if (!(lun & (1 << pACB->pScsiHost->this_id)))
1610      printk (KERN_ERR "DC390: Reselection must select host adapter: %02x!\n", lun);
1611    else
1612      lun ^= 1 << pACB->pScsiHost->this_id; /* Mask AdapterID */
1613    id = 0; while (lun >>= 1) id++;
1614    /* Get LUN */
1615    lun = DC390_read8 (ScsiFifo);
1616    if (!(lun & IDENTIFY_BASE)) printk (KERN_ERR "DC390: Resel: Expect identify message!\n");
1617    lun &= 7;
1618    DEBUG0(printk ("(%02i-%i),", id, lun));
1619    pDCB = dc390_findDCB (pACB, id, lun);
1620    if (!pDCB)
1621    {
1622        printk (KERN_ERR "DC390: Reselect from non existing device (%02i-%i)\n",
1623                    id, lun);
1624        return;
1625    }
1626    pACB->pActiveDCB = pDCB;
1627    /* TagQ: We expect a message soon, so never mind the exact SRB */
1628    if( pDCB->SyncMode & EN_TAG_QUEUEING )
1629    {
1630        pSRB = pACB->pTmpSRB;
1631        pDCB->pActiveSRB = pSRB;
1632    }
1633    else
1634    {
1635        pSRB = pDCB->pActiveSRB;
1636        if( !pSRB || !(pSRB->SRBState & SRB_DISCONNECT) )
1637        {
1638            pSRB= pACB->pTmpSRB;
1639            pSRB->SRBState = SRB_UNEXPECT_RESEL;
1640            printk (KERN_ERR "DC390: Reselect without outstanding cmnd (%02i-%i)\n",
1641                    id, lun);
1642            pDCB->pActiveSRB = pSRB;
1643            dc390_EnableMsgOut_Abort ( pACB, pSRB );
1644        }
1645        else
1646        {
1647            if( pDCB->DCBFlag & ABORT_DEV_ )
1648            {
1649                pSRB->SRBState = SRB_ABORT_SENT;
1650                printk (KERN_INFO "DC390: Reselect: Abort (%02i-%i)\n",
1651                        id, lun);
1652                dc390_EnableMsgOut_Abort( pACB, pSRB );
1653            }
1654            else
1655                pSRB->SRBState = SRB_DATA_XFER;
1656        }
1657    }
1658
1659    DEBUG1(printk (KERN_DEBUG "Resel SRB(%p): TagNum (%02x)\n", pSRB, pSRB->TagNumber));
1660    pSRB->ScsiPhase = SCSI_NOP0;
1661    DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
1662    DC390_write8 (Sync_Period, pDCB->SyncPeriod);
1663    DC390_write8 (Sync_Offset, pDCB->SyncOffset);
1664    DC390_write8 (CtrlReg1, pDCB->CtrlR1);
1665    DC390_write8 (CtrlReg3, pDCB->CtrlR3);
1666    DC390_write8 (CtrlReg4, pDCB->CtrlR4);      /* ; Glitch eater */
1667    DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);   /* ;to release the /ACK signal */
1668}
1669
1670static int __inline__
1671dc390_RequestSense(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1672{
1673        struct scsi_cmnd *pcmd;
1674
1675        pcmd = pSRB->pcmd;
1676
1677        REMOVABLEDEBUG(printk(KERN_INFO "DC390: RequestSense(Cmd %02x, Id %02x, LUN %02x)\n",\
1678                              pcmd->cmnd[0], pDCB->TargetID, pDCB->TargetLUN));
1679
1680        pSRB->SRBFlag |= AUTO_REQSENSE;
1681        pSRB->SavedTotXLen = pSRB->TotalXferredLen;
1682        pSRB->AdaptStatus = 0;
1683        pSRB->TargetStatus = 0; /* CHECK_CONDITION<<1; */
1684
1685        /* We are called from SRBdone, original PCI mapping has been removed
1686         * already, new one is set up from StartSCSI */
1687        pSRB->SGIndex = 0;
1688
1689        pSRB->TotalXferredLen = 0;
1690        pSRB->SGToBeXferLen = 0;
1691        return dc390_StartSCSI(pACB, pDCB, pSRB);
1692}
1693
1694
1695static void
1696dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
1697{
1698    u8 status;
1699    struct scsi_cmnd *pcmd;
1700
1701    pcmd = pSRB->pcmd;
1702    /* KG: Moved pci_unmap here */
1703    dc390_pci_unmap(pSRB);
1704
1705    status = pSRB->TargetStatus;
1706
1707    DEBUG0(printk (" SRBdone (%02x,%08x), SRB %p, pid %li\n", status, pcmd->result,\
1708                pSRB, pcmd->serial_number));
1709    if(pSRB->SRBFlag & AUTO_REQSENSE)
1710    {   /* Last command was a Request Sense */
1711        pSRB->SRBFlag &= ~AUTO_REQSENSE;
1712        pSRB->AdaptStatus = 0;
1713        pSRB->TargetStatus = SAM_STAT_CHECK_CONDITION;
1714
1715        //pcmd->result = MK_RES(DRIVER_SENSE,DID_OK,0,status);
1716        if (status == SAM_STAT_CHECK_CONDITION)
1717            pcmd->result = MK_RES_LNX(0, DID_BAD_TARGET, 0, /*CHECK_CONDITION*/0);
1718        else /* Retry */
1719        {
1720            if( pSRB->pcmd->cmnd[0] == TEST_UNIT_READY /* || pSRB->pcmd->cmnd[0] == START_STOP */)
1721            {
1722                /* Don't retry on TEST_UNIT_READY */
1723                pcmd->result = MK_RES_LNX(DRIVER_SENSE, DID_OK, 0, SAM_STAT_CHECK_CONDITION);
1724                REMOVABLEDEBUG(printk(KERN_INFO "Cmd=%02x, Result=%08x, XferL=%08x\n",pSRB->pcmd->cmnd[0],\
1725                       (u32) pcmd->result, (u32) pSRB->TotalXferredLen));
1726            } else {
1727                SET_RES_DRV(pcmd->result, DRIVER_SENSE);
1728                //pSRB->ScsiCmdLen       = (u8) (pSRB->Segment1[0] >> 8);
1729                DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->serial_number, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1730                pSRB->TotalXferredLen = 0;
1731                SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1732            }
1733        }
1734        goto cmd_done;
1735    }
1736    if( status )
1737    {
1738        if (status == SAM_STAT_CHECK_CONDITION)
1739        {
1740            if (dc390_RequestSense(pACB, pDCB, pSRB)) {
1741                SET_RES_DID(pcmd->result, DID_ERROR);
1742                goto cmd_done;
1743            }
1744            return;
1745        }
1746        else if (status == SAM_STAT_TASK_SET_FULL)
1747        {
1748            scsi_track_queue_full(pcmd->device, pDCB->GoingSRBCnt - 1);
1749            DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->serial_number, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1750            pSRB->TotalXferredLen = 0;
1751            SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1752        }
1753        else if (status == SAM_STAT_BUSY &&
1754                 (pcmd->cmnd[0] == TEST_UNIT_READY || pcmd->cmnd[0] == INQUIRY) &&
1755                 pACB->scan_devices)
1756        {
1757            pSRB->AdaptStatus = 0;
1758            pSRB->TargetStatus = status;
1759            pcmd->result = MK_RES(0,0,pSRB->EndMessage,/*status*/0);
1760        }
1761        else
1762        {   /* Another error */
1763            pSRB->TotalXferredLen = 0;
1764            SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1765            goto cmd_done;
1766        }
1767    }
1768    else
1769    {   /*  Target status == 0 */
1770        status = pSRB->AdaptStatus;
1771        if (status == H_OVER_UNDER_RUN)
1772        {
1773            pSRB->TargetStatus = 0;
1774            SET_RES_DID(pcmd->result,DID_OK);
1775            SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1776        }
1777        else if (status == H_SEL_TIMEOUT)
1778        {
1779            pcmd->result = MK_RES(0, DID_NO_CONNECT, 0, 0);
1780            /* Devices are removed below ... */
1781        }
1782        else if( pSRB->SRBStatus & PARITY_ERROR)
1783        {
1784            //pcmd->result = MK_RES(0,DID_PARITY,pSRB->EndMessage,0);
1785            SET_RES_DID(pcmd->result,DID_PARITY);
1786            SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1787        }
1788        else                   /* No error */
1789        {
1790            pSRB->AdaptStatus = 0;
1791            pSRB->TargetStatus = 0;
1792            SET_RES_DID(pcmd->result,DID_OK);
1793        }
1794    }
1795
1796cmd_done:
1797    scsi_set_resid(pcmd, scsi_bufflen(pcmd) - pSRB->TotalXferredLen);
1798
1799    dc390_Going_remove (pDCB, pSRB);
1800    /* Add to free list */
1801    dc390_Free_insert (pACB, pSRB);
1802
1803    DEBUG0(printk (KERN_DEBUG "DC390: SRBdone: done pid %li\n", pcmd->serial_number));
1804    pcmd->scsi_done (pcmd);
1805
1806    return;
1807}
1808
1809
1810/* Remove all SRBs from Going list and inform midlevel */
1811static void
1812dc390_DoingSRB_Done(struct dc390_acb* pACB, struct scsi_cmnd *cmd)
1813{
1814    struct dc390_dcb *pDCB, *pdcb;
1815    struct dc390_srb *psrb, *psrb2;
1816    int i;
1817    struct scsi_cmnd *pcmd;
1818
1819    pDCB = pACB->pLinkDCB;
1820    pdcb = pDCB;
1821    if (! pdcb) return;
1822    do
1823    {
1824        psrb = pdcb->pGoingSRB;
1825        for (i = 0; i < pdcb->GoingSRBCnt; i++)
1826        {
1827            psrb2 = psrb->pNextSRB;
1828            pcmd = psrb->pcmd;
1829            dc390_Free_insert (pACB, psrb);
1830            psrb  = psrb2;
1831        }
1832        pdcb->GoingSRBCnt = 0;
1833        pdcb->pGoingSRB = NULL;
1834        pdcb->TagMask = 0;
1835        pdcb = pdcb->pNextDCB;
1836    } while( pdcb != pDCB );
1837}
1838
1839
1840static void
1841dc390_ResetSCSIBus( struct dc390_acb* pACB )
1842{
1843    //DC390_write8 (ScsiCmd, RST_DEVICE_CMD);
1844    //udelay (250);
1845    //DC390_write8 (ScsiCmd, NOP_CMD);
1846
1847    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1848    DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1849    DC390_write8 (ScsiCmd, RST_SCSI_BUS_CMD);
1850    pACB->Connected = 0;
1851
1852    return;
1853}
1854
1855static void
1856dc390_ScsiRstDetect( struct dc390_acb* pACB )
1857{
1858    printk ("DC390: Rst_Detect: laststat = %08x\n", dc390_laststatus);
1859    //DEBUG0(printk(KERN_INFO "RST_DETECT,"));
1860
1861    DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1862    /* Unlock before ? */
1863    /* delay half a second */
1864    udelay (1000);
1865    DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1866    pACB->pScsiHost->last_reset = jiffies + 5*HZ/2
1867                    + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
1868    pACB->Connected = 0;
1869
1870    if( pACB->ACBFlag & RESET_DEV )
1871        pACB->ACBFlag |= RESET_DONE;
1872    else
1873    {   /* Reset was issued by sb else */
1874        pACB->ACBFlag |= RESET_DETECT;
1875
1876        dc390_ResetDevParam( pACB );
1877        dc390_DoingSRB_Done( pACB, NULL);
1878        //dc390_RecoverSRB( pACB );
1879        pACB->pActiveDCB = NULL;
1880        pACB->ACBFlag = 0;
1881    }
1882    return;
1883}
1884
1885static int DC390_queuecommand(struct scsi_cmnd *cmd,
1886                void (*done)(struct scsi_cmnd *))
1887{
1888        struct scsi_device *sdev = cmd->device;
1889        struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
1890        struct dc390_dcb *dcb = sdev->hostdata;
1891        struct dc390_srb *srb;
1892
1893        if (sdev->queue_depth <= dcb->GoingSRBCnt)
1894                goto device_busy;
1895        if (acb->pActiveDCB)
1896                goto host_busy;
1897        if (acb->ACBFlag & (RESET_DETECT|RESET_DONE|RESET_DEV))
1898                goto host_busy;
1899
1900        srb = acb->pFreeSRB;
1901        if (unlikely(srb == NULL))
1902                goto host_busy;
1903
1904        cmd->scsi_done = done;
1905        cmd->result = 0;
1906        acb->Cmds++;
1907
1908        acb->pFreeSRB = srb->pNextSRB;
1909        srb->pNextSRB = NULL;
1910
1911        srb->pSRBDCB = dcb;
1912        srb->pcmd = cmd;
1913        cmd->host_scribble = (char *)srb;
1914    
1915        srb->SGIndex = 0;
1916        srb->AdaptStatus = 0;
1917        srb->TargetStatus = 0;
1918        srb->MsgCnt = 0;
1919
1920        srb->SRBStatus = 0;
1921        srb->SRBFlag = 0;
1922        srb->SRBState = 0;
1923        srb->TotalXferredLen = 0;
1924        srb->SGBusAddr = 0;
1925        srb->SGToBeXferLen = 0;
1926        srb->ScsiPhase = 0;
1927        srb->EndMessage = 0;
1928        srb->TagNumber = SCSI_NO_TAG;
1929
1930        if (dc390_StartSCSI(acb, dcb, srb)) {
1931                dc390_Free_insert(acb, srb);
1932                goto host_busy;
1933        }
1934
1935        dc390_Going_append(dcb, srb);
1936
1937        return 0;
1938
1939 host_busy:
1940        return SCSI_MLQUEUE_HOST_BUSY;
1941
1942 device_busy:
1943        return SCSI_MLQUEUE_DEVICE_BUSY;
1944}
1945
1946static void dc390_dumpinfo (struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1947{
1948    struct pci_dev *pdev;
1949    u16 pstat;
1950
1951    if (!pDCB) pDCB = pACB->pActiveDCB;
1952    if (!pSRB && pDCB) pSRB = pDCB->pActiveSRB;
1953
1954    if (pSRB) 
1955    {
1956        printk ("DC390: SRB: Xferred %08lx, Remain %08lx, State %08x, Phase %02x\n",
1957                pSRB->TotalXferredLen, pSRB->SGToBeXferLen, pSRB->SRBState,
1958                pSRB->ScsiPhase);
1959        printk ("DC390: AdpaterStatus: %02x, SRB Status %02x\n", pSRB->AdaptStatus, pSRB->SRBStatus);
1960    }
1961    printk ("DC390: Status of last IRQ (DMA/SC/Int/IRQ): %08x\n", dc390_laststatus);
1962    printk ("DC390: Register dump: SCSI block:\n");
1963    printk ("DC390: XferCnt  Cmd Stat IntS IRQS FFIS Ctl1 Ctl2 Ctl3 Ctl4\n");
1964    printk ("DC390:  %06x   %02x   %02x   %02x",
1965            DC390_read8(CtcReg_Low) + (DC390_read8(CtcReg_Mid) << 8) + (DC390_read8(CtcReg_High) << 16),
1966            DC390_read8(ScsiCmd), DC390_read8(Scsi_Status), DC390_read8(Intern_State));
1967    printk ("   %02x   %02x   %02x   %02x   %02x   %02x\n",
1968            DC390_read8(INT_Status), DC390_read8(Current_Fifo), DC390_read8(CtrlReg1),
1969            DC390_read8(CtrlReg2), DC390_read8(CtrlReg3), DC390_read8(CtrlReg4));
1970    DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
1971    if (DC390_read8(Current_Fifo) & 0x1f)
1972      {
1973        printk ("DC390: FIFO:");
1974        while (DC390_read8(Current_Fifo) & 0x1f) printk (" %02x", DC390_read8(ScsiFifo));
1975        printk ("\n");
1976      }
1977    printk ("DC390: Register dump: DMA engine:\n");
1978    printk ("DC390: Cmd   STrCnt    SBusA    WrkBC    WrkAC Stat SBusCtrl\n");
1979    printk ("DC390:  %02x %08x %08x %08x %08x   %02x %08x\n",
1980            DC390_read8(DMA_Cmd), DC390_read32(DMA_XferCnt), DC390_read32(DMA_XferAddr),
1981            DC390_read32(DMA_Wk_ByteCntr), DC390_read32(DMA_Wk_AddrCntr),
1982            DC390_read8(DMA_Status), DC390_read32(DMA_ScsiBusCtrl));
1983    DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
1984
1985    pdev = pACB->pdev;
1986    pci_read_config_word(pdev, PCI_STATUS, &pstat);
1987    printk ("DC390: Register dump: PCI Status: %04x\n", pstat);
1988    printk ("DC390: In case of driver trouble read Documentation/scsi/tmscsim.txt\n");
1989}
1990
1991
1992static int DC390_abort(struct scsi_cmnd *cmd)
1993{
1994        struct dc390_acb *pACB = (struct dc390_acb*) cmd->device->host->hostdata;
1995        struct dc390_dcb *pDCB = (struct dc390_dcb*) cmd->device->hostdata;
1996
1997        scmd_printk(KERN_WARNING, cmd,
1998                "DC390: Abort command (pid %li)\n", cmd->serial_number);
1999
2000        /* abort() is too stupid for already sent commands at the moment. 
2001         * If it's called we are in trouble anyway, so let's dump some info 
2002         * into the syslog at least. (KG, 98/08/20,99/06/20) */
2003        dc390_dumpinfo(pACB, pDCB, NULL);
2004
2005        pDCB->DCBFlag |= ABORT_DEV_;
2006        printk(KERN_INFO "DC390: Aborted pid %li\n", cmd->serial_number);
2007
2008        return FAILED;
2009}
2010
2011
2012static void dc390_ResetDevParam( struct dc390_acb* pACB )
2013{
2014    struct dc390_dcb *pDCB, *pdcb;
2015
2016    pDCB = pACB->pLinkDCB;
2017    if (! pDCB) return;
2018    pdcb = pDCB;
2019    do
2020    {
2021        pDCB->SyncMode &= ~SYNC_NEGO_DONE;
2022        pDCB->SyncPeriod = 0;
2023        pDCB->SyncOffset = 0;
2024        pDCB->TagMask = 0;
2025        pDCB->CtrlR3 = FAST_CLK;
2026        pDCB->CtrlR4 &= NEGATE_REQACKDATA | CTRL4_RESERVED | NEGATE_REQACK;
2027        pDCB->CtrlR4 |= pACB->glitch_cfg;
2028        pDCB = pDCB->pNextDCB;
2029    }
2030    while( pdcb != pDCB );
2031    pACB->ACBFlag &= ~(RESET_DEV | RESET_DONE | RESET_DETECT);
2032
2033}
2034
2035static int DC390_bus_reset (struct scsi_cmnd *cmd)
2036{
2037        struct dc390_acb*    pACB = (struct dc390_acb*) cmd->device->host->hostdata;
2038        u8   bval;
2039
2040        spin_lock_irq(cmd->device->host->host_lock);
2041
2042        bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2043        DC390_write8(CtrlReg1, bval);   /* disable IRQ on bus reset */
2044
2045        pACB->ACBFlag |= RESET_DEV;
2046        dc390_ResetSCSIBus(pACB);
2047
2048        dc390_ResetDevParam(pACB);
2049        mdelay(1);
2050        pACB->pScsiHost->last_reset = jiffies + 3*HZ/2 
2051                + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2052    
2053        DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2054        DC390_read8(INT_Status);                /* Reset Pending INT */
2055
2056        dc390_DoingSRB_Done(pACB, cmd);
2057
2058        pACB->pActiveDCB = NULL;
2059        pACB->ACBFlag = 0;
2060
2061        bval = DC390_read8(CtrlReg1) & ~DIS_INT_ON_SCSI_RST;
2062        DC390_write8(CtrlReg1, bval);   /* re-enable interrupt */
2063
2064        spin_unlock_irq(cmd->device->host->host_lock);
2065
2066        return SUCCESS;
2067}
2068
2069/**
2070 * dc390_slave_alloc - Called by the scsi mid layer to tell us about a new
2071 * scsi device that we need to deal with.
2072 *
2073 * @scsi_device: The new scsi device that we need to handle.
2074 */
2075static int dc390_slave_alloc(struct scsi_device *scsi_device)
2076{
2077        struct dc390_acb *pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2078        struct dc390_dcb *pDCB, *pDCB2 = NULL;
2079        uint id = scsi_device->id;
2080        uint lun = scsi_device->lun;
2081
2082        pDCB = kzalloc(sizeof(struct dc390_dcb), GFP_KERNEL);
2083        if (!pDCB)
2084                return -ENOMEM;
2085
2086        if (!pACB->DCBCnt++) {
2087                pACB->pLinkDCB = pDCB;
2088                pACB->pDCBRunRobin = pDCB;
2089        } else {
2090                pACB->pLastDCB->pNextDCB = pDCB;
2091        }
2092   
2093        pDCB->pNextDCB = pACB->pLinkDCB;
2094        pACB->pLastDCB = pDCB;
2095
2096        pDCB->pDCBACB = pACB;
2097        pDCB->TargetID = id;
2098        pDCB->TargetLUN = lun;
2099
2100        /*
2101         * Some values are for all LUNs: Copy them 
2102         * In a clean way: We would have an own structure for a SCSI-ID 
2103         */
2104        if (lun && (pDCB2 = dc390_findDCB(pACB, id, 0))) {
2105                pDCB->DevMode = pDCB2->DevMode;
2106                pDCB->SyncMode = pDCB2->SyncMode & SYNC_NEGO_DONE;
2107                pDCB->SyncPeriod = pDCB2->SyncPeriod;
2108                pDCB->SyncOffset = pDCB2->SyncOffset;
2109                pDCB->NegoPeriod = pDCB2->NegoPeriod;
2110      
2111                pDCB->CtrlR3 = pDCB2->CtrlR3;
2112                pDCB->CtrlR4 = pDCB2->CtrlR4;
2113        } else {
2114                u8 index = pACB->AdapterIndex;
2115                PEEprom prom = (PEEprom) &dc390_eepromBuf[index][id << 2];
2116
2117                pDCB->DevMode = prom->EE_MODE1;
2118                pDCB->NegoPeriod =
2119                        (dc390_clock_period1[prom->EE_SPEED] * 25) >> 2;
2120                pDCB->CtrlR3 = FAST_CLK;
2121                pDCB->CtrlR4 = pACB->glitch_cfg | CTRL4_RESERVED;
2122                if (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION)
2123                        pDCB->CtrlR4 |= NEGATE_REQACKDATA | NEGATE_REQACK;
2124        }
2125
2126        if (pDCB->DevMode & SYNC_NEGO_)
2127                pDCB->SyncMode |= SYNC_ENABLE;
2128        else {
2129                pDCB->SyncMode = 0;
2130                pDCB->SyncOffset &= ~0x0f;
2131        }
2132
2133        pDCB->CtrlR1 = pACB->pScsiHost->this_id;
2134        if (pDCB->DevMode & PARITY_CHK_)
2135                pDCB->CtrlR1 |= PARITY_ERR_REPO;
2136
2137        pACB->scan_devices = 1;
2138        scsi_device->hostdata = pDCB;
2139        return 0;
2140}
2141
2142/**
2143 * dc390_slave_destroy - Called by the scsi mid layer to tell us about a
2144 * device that is going away.
2145 *
2146 * @scsi_device: The scsi device that we need to remove.
2147 */
2148static void dc390_slave_destroy(struct scsi_device *scsi_device)
2149{
2150        struct dc390_acb* pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2151        struct dc390_dcb* pDCB = (struct dc390_dcb*) scsi_device->hostdata;
2152        struct dc390_dcb* pPrevDCB = pACB->pLinkDCB;
2153
2154        pACB->scan_devices = 0;
2155
2156        BUG_ON(pDCB->GoingSRBCnt > 1);
2157        
2158        if (pDCB == pACB->pLinkDCB) {
2159                if (pACB->pLastDCB == pDCB) {
2160                        pDCB->pNextDCB = NULL;
2161                        pACB->pLastDCB = NULL;
2162                }
2163                pACB->pLinkDCB = pDCB->pNextDCB;
2164        } else {
2165                while (pPrevDCB->pNextDCB != pDCB)
2166                        pPrevDCB = pPrevDCB->pNextDCB;
2167                pPrevDCB->pNextDCB = pDCB->pNextDCB;
2168                if (pDCB == pACB->pLastDCB)
2169                        pACB->pLastDCB = pPrevDCB;
2170        }
2171
2172        if (pDCB == pACB->pActiveDCB)
2173                pACB->pActiveDCB = NULL;
2174        if (pDCB == pACB->pLinkDCB)
2175                pACB->pLinkDCB = pDCB->pNextDCB;
2176        if (pDCB == pACB->pDCBRunRobin)
2177                pACB->pDCBRunRobin = pDCB->pNextDCB;
2178        kfree(pDCB); 
2179        
2180        pACB->DCBCnt--;
2181}
2182
2183static int dc390_slave_configure(struct scsi_device *sdev)
2184{
2185        struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
2186        struct dc390_dcb *dcb = (struct dc390_dcb *)sdev->hostdata;
2187
2188        acb->scan_devices = 0;
2189        if (sdev->tagged_supported && (dcb->DevMode & TAG_QUEUEING_)) {
2190                dcb->SyncMode |= EN_TAG_QUEUEING;
2191                scsi_activate_tcq(sdev, acb->TagMaxNum);
2192        }
2193
2194        return 0;
2195}
2196
2197static struct scsi_host_template driver_template = {
2198        .module                 = THIS_MODULE,
2199        .proc_name              = "tmscsim", 
2200        .name                   = DC390_BANNER " V" DC390_VERSION,
2201        .slave_alloc            = dc390_slave_alloc,
2202        .slave_configure        = dc390_slave_configure,
2203        .slave_destroy          = dc390_slave_destroy,
2204        .queuecommand           = DC390_queuecommand,
2205        .eh_abort_handler       = DC390_abort,
2206        .eh_bus_reset_handler   = DC390_bus_reset,
2207        .can_queue              = 1,
2208        .this_id                = 7,
2209        .sg_tablesize           = SG_ALL,
2210        .cmd_per_lun            = 1,
2211        .use_clustering         = ENABLE_CLUSTERING,
2212        .max_sectors            = 0x4000, /* 8MiB = 16 * 1024 * 512 */
2213};
2214
2215/***********************************************************************
2216 * Functions for access to DC390 EEPROM
2217 * and some to emulate it
2218 *
2219 **********************************************************************/
2220
2221static void __devinit dc390_eeprom_prepare_read(struct pci_dev *pdev, u8 cmd)
2222{
2223        u8 carryFlag = 1, j = 0x80, bval;
2224        int i;
2225
2226        for (i = 0; i < 9; i++) {
2227                if (carryFlag) {
2228                        pci_write_config_byte(pdev, 0x80, 0x40);
2229                        bval = 0xc0;
2230                } else
2231                        bval = 0x80;
2232
2233                udelay(160);
2234                pci_write_config_byte(pdev, 0x80, bval);
2235                udelay(160);
2236                pci_write_config_byte(pdev, 0x80, 0);
2237                udelay(160);
2238
2239                carryFlag = (cmd & j) ? 1 : 0;
2240                j >>= 1;
2241        }
2242}
2243
2244static u16 __devinit dc390_eeprom_get_data(struct pci_dev *pdev)
2245{
2246        int i;
2247        u16 wval = 0;
2248        u8 bval;
2249
2250        for (i = 0; i < 16; i++) {
2251                wval <<= 1;
2252
2253                pci_write_config_byte(pdev, 0x80, 0x80);
2254                udelay(160);
2255                pci_write_config_byte(pdev, 0x80, 0x40);
2256                udelay(160);
2257                pci_read_config_byte(pdev, 0x00, &bval);
2258
2259                if (bval == 0x22)
2260                        wval |= 1;
2261        }
2262
2263        return wval;
2264}
2265
2266static void __devinit dc390_read_eeprom(struct pci_dev *pdev, u16 *ptr)
2267{
2268        u8 cmd = EEPROM_READ, i;
2269
2270        for (i = 0; i < 0x40; i++) {
2271                pci_write_config_byte(pdev, 0xc0, 0);
2272                udelay(160);
2273
2274                dc390_eeprom_prepare_read(pdev, cmd++);
2275                *ptr++ = dc390_eeprom_get_data(pdev);
2276
2277                pci_write_config_byte(pdev, 0x80, 0);
2278                pci_write_config_byte(pdev, 0x80, 0);
2279                udelay(160);
2280        }
2281}
2282
2283/* Override EEprom values with explicitly set values */
2284static void __devinit dc390_eeprom_override(u8 index)
2285{
2286        u8 *ptr = (u8 *) dc390_eepromBuf[index], id;
2287
2288        /* Adapter Settings */
2289        if (tmscsim[0] != -2)
2290                ptr[EE_ADAPT_SCSI_ID] = (u8)tmscsim[0]; /* Adapter ID */
2291        if (tmscsim[3] != -2)
2292                ptr[EE_MODE2] = (u8)tmscsim[3];
2293        if (tmscsim[5] != -2)
2294                ptr[EE_DELAY] = tmscsim[5];             /* Reset delay */
2295        if (tmscsim[4] != -2)
2296                ptr[EE_TAG_CMD_NUM] = (u8)tmscsim[4];   /* Tagged Cmds */
2297
2298        /* Device Settings */
2299        for (id = 0; id < MAX_SCSI_ID; id++) {
2300                if (tmscsim[2] != -2)
2301                        ptr[id << 2] = (u8)tmscsim[2];          /* EE_MODE1 */
2302                if (tmscsim[1] != -2)
2303                        ptr[(id << 2) + 1] = (u8)tmscsim[1];    /* EE_Speed */
2304        }
2305}
2306
2307static int __devinitdata tmscsim_def[] = {
2308        7,
2309        0 /* 10MHz */,
2310        PARITY_CHK_ | SEND_START_ | EN_DISCONNECT_ | SYNC_NEGO_ | TAG_QUEUEING_,
2311        MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION | LUN_CHECK,
2312        3 /* 16 Tags per LUN */,
2313        1 /* s delay after Reset */,
2314};
2315
2316/* Copy defaults over set values where missing */
2317static void __devinit dc390_fill_with_defaults (void)
2318{
2319        int i;
2320
2321        for (i = 0; i < 6; i++) {
2322                if (tmscsim[i] < 0 || tmscsim[i] > 255)
2323                        tmscsim[i] = tmscsim_def[i];
2324        }
2325
2326        /* Sanity checks */
2327        if (tmscsim[0] > 7)
2328                tmscsim[0] = 7;
2329        if (tmscsim[1] > 7)
2330                tmscsim[1] = 4;
2331        if (tmscsim[4] > 5)
2332                tmscsim[4] = 4;
2333        if (tmscsim[5] > 180)
2334                tmscsim[5] = 180;
2335}
2336
2337static void __devinit dc390_check_eeprom(struct pci_dev *pdev, u8 index)
2338{
2339        u8 interpd[] = {1, 3, 5, 10, 16, 30, 60, 120};
2340        u8 EEbuf[128];
2341        u16 *ptr = (u16 *)EEbuf, wval = 0;
2342        int i;
2343
2344        dc390_read_eeprom(pdev, ptr);
2345        memcpy(dc390_eepromBuf[index], EEbuf, EE_ADAPT_SCSI_ID);
2346        memcpy(&dc390_eepromBuf[index][EE_ADAPT_SCSI_ID], 
2347               &EEbuf[REAL_EE_ADAPT_SCSI_ID], EE_LEN - EE_ADAPT_SCSI_ID);
2348
2349        dc390_eepromBuf[index][EE_DELAY] = interpd[dc390_eepromBuf[index][EE_DELAY]];
2350
2351        for (i = 0; i < 0x40; i++, ptr++)
2352                wval += *ptr;
2353
2354        /* no Tekram EEprom found */
2355        if (wval != 0x1234) {
2356                int speed;
2357
2358                printk(KERN_INFO "DC390_init: No EEPROM found! Trying default settings ...\n");
2359
2360                /*
2361                 * XXX(hch): bogus, because we might have tekram and
2362                 *           non-tekram hbas in a single machine.
2363                 */
2364                dc390_fill_with_defaults();
2365
2366                speed = dc390_clock_speed[tmscsim[1]];
2367                printk(KERN_INFO "DC390: Used defaults: AdaptID=%i, SpeedIdx=%i (%i.%i MHz), "
2368                       "DevMode=0x%02x, AdaptMode=0x%02x, TaggedCmnds=%i (%i), DelayReset=%is\n", 
2369                       tmscsim[0], tmscsim[1], speed / 10, speed % 10,
2370                       (u8)tmscsim[2], (u8)tmscsim[3], tmscsim[4], 2 << (tmscsim[4]), tmscsim[5]);
2371        }
2372}
2373
2374static void __devinit dc390_init_hw(struct dc390_acb *pACB, u8 index)
2375{
2376        struct Scsi_Host *shost = pACB->pScsiHost;
2377        u8 dstate;
2378
2379        /* Disable SCSI bus reset interrupt */
2380        DC390_write8(CtrlReg1, DIS_INT_ON_SCSI_RST | shost->this_id);
2381
2382        if (pACB->Gmode2 & RST_SCSI_BUS) {
2383                dc390_ResetSCSIBus(pACB);
2384                udelay(1000);
2385                shost->last_reset = jiffies + HZ/2 +
2386                        HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2387        }
2388
2389        pACB->ACBFlag = 0;
2390
2391        /* Reset Pending INT */
2392        DC390_read8(INT_Status);
2393        
2394        /* 250ms selection timeout */
2395        DC390_write8(Scsi_TimeOut, SEL_TIMEOUT);
2396        
2397        /* Conversion factor = 0 , 40MHz clock */
2398        DC390_write8(Clk_Factor, CLK_FREQ_40MHZ);
2399        
2400        /* NOP cmd - clear command register */
2401        DC390_write8(ScsiCmd, NOP_CMD);
2402        
2403        /* Enable Feature and SCSI-2 */
2404        DC390_write8(CtrlReg2, EN_FEATURE+EN_SCSI2_CMD);
2405        
2406        /* Fast clock */
2407        DC390_write8(CtrlReg3, FAST_CLK);
2408
2409        /* Negation */
2410        DC390_write8(CtrlReg4, pACB->glitch_cfg | /* glitch eater */
2411                (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION) ?
2412                 NEGATE_REQACKDATA : 0);
2413        
2414        /* Clear Transfer Count High: ID */
2415        DC390_write8(CtcReg_High, 0);
2416        DC390_write8(DMA_Cmd, DMA_IDLE_CMD);
2417        DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2418        DC390_write32(DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
2419
2420        dstate = DC390_read8(DMA_Status);
2421        DC390_write8(DMA_Status, dstate);
2422}
2423
2424static int __devinit dc390_probe_one(struct pci_dev *pdev,
2425                                    const struct pci_device_id *id)
2426{
2427        struct dc390_acb *pACB;
2428        struct Scsi_Host *shost;
2429        unsigned long io_port;
2430        int error = -ENODEV, i;
2431
2432        if (pci_enable_device(pdev))
2433                goto out;
2434
2435        pci_set_master(pdev);
2436
2437        error = -ENOMEM;
2438        if (disable_clustering)
2439                driver_template.use_clustering = DISABLE_CLUSTERING;
2440        shost = scsi_host_alloc(&driver_template, sizeof(struct dc390_acb));
2441        if (!shost)
2442                goto out_disable_device;
2443
2444        pACB = (struct dc390_acb *)shost->hostdata;
2445        memset(pACB, 0, sizeof(struct dc390_acb));
2446
2447        dc390_check_eeprom(pdev, dc390_adapterCnt);
2448        dc390_eeprom_override(dc390_adapterCnt);
2449
2450        io_port = pci_resource_start(pdev, 0);
2451
2452        shost->this_id = dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID];
2453        shost->io_port = io_port;
2454        shost->n_io_port = 0x80;
2455        shost->irq = pdev->irq;
2456        shost->base = io_port;
2457        shost->unique_id = io_port;
2458        shost->last_reset = jiffies;
2459        
2460        pACB->pScsiHost = shost;
2461        pACB->IOPortBase = (u16) io_port;
2462        pACB->IRQLevel = pdev->irq;
2463        
2464        shost->max_id = 8;
2465
2466        if (shost->max_id - 1 ==
2467            dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID])
2468                shost->max_id--;
2469
2470        if (dc390_eepromBuf[dc390_adapterCnt][EE_MODE2] & LUN_CHECK)
2471                shost->max_lun = 8;
2472        else
2473                shost->max_lun = 1;
2474
2475        pACB->pFreeSRB = pACB->SRB_array;
2476        pACB->SRBCount = MAX_SRB_CNT;
2477        pACB->AdapterIndex = dc390_adapterCnt;
2478        pACB->TagMaxNum =
2479                2 << dc390_eepromBuf[dc390_adapterCnt][EE_TAG_CMD_NUM];
2480        pACB->Gmode2 = dc390_eepromBuf[dc390_adapterCnt][EE_MODE2];
2481
2482        for (i = 0; i < pACB->SRBCount-1; i++)
2483                pACB->SRB_array[i].pNextSRB = &pACB->SRB_array[i+1];
2484        pACB->SRB_array[pACB->SRBCount-1].pNextSRB = NULL;
2485        pACB->pTmpSRB = &pACB->TmpSRB;
2486
2487        pACB->sel_timeout = SEL_TIMEOUT;
2488        pACB->glitch_cfg = EATER_25NS;
2489        pACB->pdev = pdev;
2490
2491        if (!request_region(io_port, shost->n_io_port, "tmscsim")) {
2492                printk(KERN_ERR "DC390: register IO ports error!\n");
2493                goto out_host_put;
2494        }
2495
2496        /* Reset Pending INT */
2497        DC390_read8_(INT_Status, io_port);
2498
2499        if (request_irq(pdev->irq, do_DC390_Interrupt, IRQF_SHARED,
2500                                "tmscsim", pACB)) {
2501                printk(KERN_ERR "DC390: register IRQ error!\n");
2502                goto out_release_region;
2503        }
2504
2505        dc390_init_hw(pACB, dc390_adapterCnt);
2506        
2507        dc390_adapterCnt++;
2508
2509        pci_set_drvdata(pdev, shost);
2510
2511        error = scsi_add_host(shost, &pdev->dev);
2512        if (error)
2513                goto out_free_irq;
2514        scsi_scan_host(shost);
2515        return 0;
2516
2517 out_free_irq:
2518        free_irq(pdev->irq, pACB);
2519 out_release_region:
2520        release_region(io_port, shost->n_io_port);
2521 out_host_put:
2522        scsi_host_put(shost);
2523 out_disable_device:
2524        pci_disable_device(pdev);
2525 out:
2526        return error;
2527}
2528
2529/**
2530 * dc390_remove_one - Called to remove a single instance of the adapter.
2531 *
2532 * @dev: The PCI device to remove.
2533 */
2534static void __devexit dc390_remove_one(struct pci_dev *dev)
2535{
2536        struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
2537        unsigned long iflags;
2538        struct dc390_acb* pACB = (struct dc390_acb*) scsi_host->hostdata;
2539        u8 bval;
2540
2541        scsi_remove_host(scsi_host);
2542
2543        spin_lock_irqsave(scsi_host->host_lock, iflags);
2544        pACB->ACBFlag = RESET_DEV;
2545        bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2546        DC390_write8 (CtrlReg1, bval);  /* disable interrupt */
2547        if (pACB->Gmode2 & RST_SCSI_BUS)
2548                dc390_ResetSCSIBus(pACB);
2549        spin_unlock_irqrestore(scsi_host->host_lock, iflags);
2550
2551        free_irq(scsi_host->irq, pACB);
2552        release_region(scsi_host->io_port, scsi_host->n_io_port);
2553
2554        pci_disable_device(dev);
2555        scsi_host_put(scsi_host);
2556        pci_set_drvdata(dev, NULL);
2557}
2558
2559static struct pci_device_id tmscsim_pci_tbl[] = {
2560        { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD53C974,
2561                PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
2562        { }
2563};
2564MODULE_DEVICE_TABLE(pci, tmscsim_pci_tbl);
2565
2566static struct pci_driver dc390_driver = {
2567        .name           = "tmscsim",
2568        .id_table       = tmscsim_pci_tbl,
2569        .probe          = dc390_probe_one,
2570        .remove         = __devexit_p(dc390_remove_one),
2571};
2572
2573static int __init dc390_module_init(void)
2574{
2575        if (!disable_clustering)
2576                printk(KERN_INFO "DC390: clustering now enabled by default. If you get problems load\n"
2577                       "\twith \"disable_clustering=1\" and report to maintainers\n");
2578
2579        if (tmscsim[0] == -1 || tmscsim[0] > 15) {
2580                tmscsim[0] = 7;
2581                tmscsim[1] = 4;
2582                tmscsim[2] = PARITY_CHK_ | TAG_QUEUEING_;
2583                tmscsim[3] = MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION;
2584                tmscsim[4] = 2;
2585                tmscsim[5] = 10;
2586                printk (KERN_INFO "DC390: Using safe settings.\n");
2587        }
2588
2589        return pci_register_driver(&dc390_driver);
2590}
2591
2592static void __exit dc390_module_exit(void)
2593{
2594        pci_unregister_driver(&dc390_driver);
2595}
2596
2597module_init(dc390_module_init);
2598module_exit(dc390_module_exit);
2599
2600#ifndef MODULE
2601static int __init dc390_setup (char *str)
2602{       
2603        int ints[8],i, im;
2604
2605        get_options(str, ARRAY_SIZE(ints), ints);
2606        im = ints[0];
2607
2608        if (im > 6) {
2609                printk (KERN_NOTICE "DC390: ignore extra params!\n");
2610                im = 6;
2611        }
2612
2613        for (i = 0; i < im; i++)
2614                tmscsim[i] = ints[i+1];
2615        /* dc390_checkparams (); */
2616        return 1;
2617}
2618
2619__setup("tmscsim=", dc390_setup);
2620#endif
2621