drivers/scsi/tmscsim.c

   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 <linux/slab.h>
 237 #include <asm/io.h>
 238
 239 #include <scsi/scsi.h>
 240 #include <scsi/scsi_cmnd.h>
 241 #include <scsi/scsi_device.h>
 242 #include <scsi/scsi_host.h>
 243 #include <scsi/scsicam.h>
 244 #include <scsi/scsi_tcq.h>
 245
 246
 247 #define DC390_BANNER "Tekram DC390/AM53C974"
 248 #define DC390_VERSION "2.1d 2004-05-27"
 249
 250 #define PCI_DEVICE_ID_AMD53C974         PCI_DEVICE_ID_AMD_SCSI
 251
 252 #include "tmscsim.h"
 253
 254
 255 static void dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 256 static void dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 257 static void dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 258 static void dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 259 static void dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 260 static void dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 261 static void dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 262 static void dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 263 static void dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 264 static void dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 265 static void dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 266 static void dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 267 static void dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 268 static void dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 269
 270 static void dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB );
 271 static void dc390_Disconnect( struct dc390_acb* pACB );
 272 static void dc390_Reselect( struct dc390_acb* pACB );
 273 static void dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB );
 274 static void dc390_ScsiRstDetect( struct dc390_acb* pACB );
 275 static void dc390_EnableMsgOut_Abort(struct dc390_acb*, struct dc390_srb*);
 276 static void dc390_dumpinfo(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB);
 277 static void dc390_ResetDevParam(struct dc390_acb* pACB);
 278
 279 static u32      dc390_laststatus = 0;
 280 static u8       dc390_adapterCnt = 0;
 281
 282 static int disable_clustering;
 283 module_param(disable_clustering, int, S_IRUGO);
 284 MODULE_PARM_DESC(disable_clustering, "If you experience problems with your devices, try setting to 1");
 285
 286 /* Startup values, to be overriden on the commandline */
 287 static int tmscsim[] = {-2, -2, -2, -2, -2, -2};
 288
 289 module_param_array(tmscsim, int, NULL, 0);
 290 MODULE_PARM_DESC(tmscsim, "Host SCSI ID, Speed (0=10MHz), Device Flags, Adapter Flags, Max Tags (log2(tags)-1), DelayReset (s)");
 291 MODULE_AUTHOR("C.L. Huang / Kurt Garloff");
 292 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram DC390 and other AMD53C974A based PCI SCSI adapters");
 293 MODULE_LICENSE("GPL");
 294 MODULE_SUPPORTED_DEVICE("sd,sr,sg,st");
 295
 296 static void *dc390_phase0[]={
 297        dc390_DataOut_0,
 298        dc390_DataIn_0,
 299        dc390_Command_0,
 300        dc390_Status_0,
 301        dc390_Nop_0,
 302        dc390_Nop_0,
 303        dc390_MsgOut_0,
 304        dc390_MsgIn_0,
 305        dc390_Nop_1
 306        };
 307
 308 static void *dc390_phase1[]={
 309        dc390_DataOutPhase,
 310        dc390_DataInPhase,
 311        dc390_CommandPhase,
 312        dc390_StatusPhase,
 313        dc390_Nop_0,
 314        dc390_Nop_0,
 315        dc390_MsgOutPhase,
 316        dc390_MsgInPhase,
 317        dc390_Nop_1
 318        };
 319
 320 #ifdef DC390_DEBUG1
 321 static char* dc390_p0_str[] = {
 322        "dc390_DataOut_0",
 323        "dc390_DataIn_0",
 324        "dc390_Command_0",
 325        "dc390_Status_0",
 326        "dc390_Nop_0",
 327        "dc390_Nop_0",
 328        "dc390_MsgOut_0",
 329        "dc390_MsgIn_0",
 330        "dc390_Nop_1"
 331        };
 332
 333 static char* dc390_p1_str[] = {
 334        "dc390_DataOutPhase",
 335        "dc390_DataInPhase",
 336        "dc390_CommandPhase",
 337        "dc390_StatusPhase",
 338        "dc390_Nop_0",
 339        "dc390_Nop_0",
 340        "dc390_MsgOutPhase",
 341        "dc390_MsgInPhase",
 342        "dc390_Nop_1"
 343        };
 344 #endif
 345
 346 static u8  dc390_eepromBuf[MAX_ADAPTER_NUM][EE_LEN];
 347 static u8  dc390_clock_period1[] = {4, 5, 6, 7, 8, 10, 13, 20};
 348 static u8  dc390_clock_speed[] = {100,80,67,57,50, 40, 31, 20};
 349
 350 /***********************************************************************
 351  * Functions for the management of the internal structures
 352  * (DCBs, SRBs, Queueing)
 353  *
 354  **********************************************************************/
 355 static void inline dc390_start_segment(struct dc390_srb* pSRB)
 356 {
 357         struct scatterlist *psgl = pSRB->pSegmentList;
 358
 359         /* start new sg segment */
 360         pSRB->SGBusAddr = sg_dma_address(psgl);
 361         pSRB->SGToBeXferLen = sg_dma_len(psgl);
 362 }
 363
 364 static unsigned long inline dc390_advance_segment(struct dc390_srb* pSRB, u32 residue)
 365 {
 366         unsigned long xfer = pSRB->SGToBeXferLen - residue;
 367
 368         /* xfer more bytes transferred */
 369         pSRB->SGBusAddr += xfer;
 370         pSRB->TotalXferredLen += xfer;
 371         pSRB->SGToBeXferLen = residue;
 372
 373         return xfer;
 374 }
 375
 376 static struct dc390_dcb __inline__ *dc390_findDCB ( struct dc390_acb* pACB, u8 id, u8 lun)
 377 {
 378    struct dc390_dcb* pDCB = pACB->pLinkDCB; if (!pDCB) return NULL;
 379    while (pDCB->TargetID != id || pDCB->TargetLUN != lun)
 380      {
 381         pDCB = pDCB->pNextDCB;
 382         if (pDCB == pACB->pLinkDCB)
 383              return NULL;
 384      }
 385    DCBDEBUG1( printk (KERN_DEBUG "DCB %p (%02x,%02x) found.\n", \
 386                       pDCB, pDCB->TargetID, pDCB->TargetLUN));
 387    return pDCB;
 388 }
 389
 390 /* Insert SRB oin top of free list */
 391 static __inline__ void dc390_Free_insert (struct dc390_acb* pACB, struct dc390_srb* pSRB)
 392 {
 393     DEBUG0(printk ("DC390: Free SRB %p\n", pSRB));
 394     pSRB->pNextSRB = pACB->pFreeSRB;
 395     pACB->pFreeSRB = pSRB;
 396 }
 397
 398 static __inline__ void dc390_Going_append (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 399 {
 400     pDCB->GoingSRBCnt++;
 401     DEBUG0(printk("DC390: Append SRB %p to Going\n", pSRB));
 402     /* Append to the list of Going commands */
 403     if( pDCB->pGoingSRB )
 404         pDCB->pGoingLast->pNextSRB = pSRB;
 405     else
 406         pDCB->pGoingSRB = pSRB;
 407
 408     pDCB->pGoingLast = pSRB;
 409     /* No next one in sent list */
 410     pSRB->pNextSRB = NULL;
 411 }
 412
 413 static __inline__ void dc390_Going_remove (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 414 {
 415         DEBUG0(printk("DC390: Remove SRB %p from Going\n", pSRB));
 416    if (pSRB == pDCB->pGoingSRB)
 417         pDCB->pGoingSRB = pSRB->pNextSRB;
 418    else
 419      {
 420         struct dc390_srb* psrb = pDCB->pGoingSRB;
 421         while (psrb && psrb->pNextSRB != pSRB)
 422           psrb = psrb->pNextSRB;
 423         if (!psrb)
 424           { printk (KERN_ERR "DC390: Remove non-ex. SRB %p from Going!\n", pSRB); return; }
 425         psrb->pNextSRB = pSRB->pNextSRB;
 426         if (pSRB == pDCB->pGoingLast)
 427           pDCB->pGoingLast = psrb;
 428      }
 429    pDCB->GoingSRBCnt--;
 430 }
 431
 432 static struct scatterlist* dc390_sg_build_single(struct scatterlist *sg, void *addr, unsigned int length)
 433 {
 434         sg_init_one(sg, addr, length);
 435         return sg;
 436 }
 437
 438 /* Create pci mapping */
 439 static int dc390_pci_map (struct dc390_srb* pSRB)
 440 {
 441         int error = 0;
 442         struct scsi_cmnd *pcmd = pSRB->pcmd;
 443         struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
 444         dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp));
 445
 446         /* Map sense buffer */
 447         if (pSRB->SRBFlag & AUTO_REQSENSE) {
 448                 pSRB->pSegmentList      = dc390_sg_build_single(&pSRB->Segmentx, pcmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
 449                 pSRB->SGcount           = pci_map_sg(pdev, pSRB->pSegmentList, 1,
 450                                                      DMA_FROM_DEVICE);
 451                 cmdp->saved_dma_handle  = sg_dma_address(pSRB->pSegmentList);
 452
 453                 /* TODO: error handling */
 454                 if (pSRB->SGcount != 1)
 455                         error = 1;
 456                 DEBUG1(printk("%s(): Mapped sense buffer %p at %x\n", __func__, pcmd->sense_buffer, cmdp->saved_dma_handle));
 457         /* Map SG list */
 458         } else if (scsi_sg_count(pcmd)) {
 459                 int nseg;
 460
 461                 nseg = scsi_dma_map(pcmd);
 462
 463                 pSRB->pSegmentList      = scsi_sglist(pcmd);
 464                 pSRB->SGcount           = nseg;
 465
 466                 /* TODO: error handling */
 467                 if (nseg < 0)
 468                         error = 1;
 469                 DEBUG1(printk("%s(): Mapped SG %p with %d (%d) elements\n",\
 470                               __func__, scsi_sglist(pcmd), nseg, scsi_sg_count(pcmd)));
 471         /* Map single segment */
 472         } else
 473                 pSRB->SGcount = 0;
 474
 475         return error;
 476 }
 477
 478 /* Remove pci mapping */
 479 static void dc390_pci_unmap (struct dc390_srb* pSRB)
 480 {
 481         struct scsi_cmnd *pcmd = pSRB->pcmd;
 482         struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
 483         DEBUG1(dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp)));
 484
 485         if (pSRB->SRBFlag) {
 486                 pci_unmap_sg(pdev, &pSRB->Segmentx, 1, DMA_FROM_DEVICE);
 487                 DEBUG1(printk("%s(): Unmapped sense buffer at %x\n", __func__, cmdp->saved_dma_handle));
 488         } else {
 489                 scsi_dma_unmap(pcmd);
 490                 DEBUG1(printk("%s(): Unmapped SG at %p with %d elements\n",
 491                               __func__, scsi_sglist(pcmd), scsi_sg_count(pcmd)));
 492         }
 493 }
 494
 495 static void __inline__
 496 dc390_freetag (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 497 {
 498         if (pSRB->TagNumber != SCSI_NO_TAG) {
 499                 pDCB->TagMask &= ~(1 << pSRB->TagNumber);   /* free tag mask */
 500                 pSRB->TagNumber = SCSI_NO_TAG;
 501         }
 502 }
 503
 504
 505 static int
 506 dc390_StartSCSI( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
 507 {
 508     struct scsi_cmnd *scmd = pSRB->pcmd;
 509     struct scsi_device *sdev = scmd->device;
 510     u8 cmd, disc_allowed, try_sync_nego;
 511     char tag[2];
 512
 513     pSRB->ScsiPhase = SCSI_NOP0;
 514
 515     if (pACB->Connected)
 516     {
 517         // Should not happen normally
 518         printk (KERN_WARNING "DC390: Can't select when connected! (%08x,%02x)\n",
 519                 pSRB->SRBState, pSRB->SRBFlag);
 520         pSRB->SRBState = SRB_READY;
 521         pACB->SelConn++;
 522         return 1;
 523     }
 524     if (time_before (jiffies, pACB->pScsiHost->last_reset))
 525     {
 526         DEBUG0(printk ("DC390: We were just reset and don't accept commands yet!\n"));
 527         return 1;
 528     }
 529     /* KG: Moved pci mapping here */
 530     dc390_pci_map(pSRB);
 531     /* TODO: error handling */
 532     DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
 533     DC390_write8 (Sync_Period, pDCB->SyncPeriod);
 534     DC390_write8 (Sync_Offset, pDCB->SyncOffset);
 535     DC390_write8 (CtrlReg1, pDCB->CtrlR1);
 536     DC390_write8 (CtrlReg3, pDCB->CtrlR3);
 537     DC390_write8 (CtrlReg4, pDCB->CtrlR4);
 538     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);             /* Flush FIFO */
 539     DEBUG1(printk (KERN_INFO "DC390: Start SCSI command: %02x (Sync:%02x)\n",\
 540             scmd->cmnd[0], pDCB->SyncMode));
 541
 542     /* Don't disconnect on AUTO_REQSENSE, cause it might be an
 543      * Contingent Allegiance Condition (6.6), where no tags should be used.
 544      * All other have to be allowed to disconnect to prevent Incorrect
 545      * Initiator Connection (6.8.2/6.5.2) */
 546     /* Changed KG, 99/06/06 */
 547     if (! (pSRB->SRBFlag & AUTO_REQSENSE))
 548         disc_allowed = pDCB->DevMode & EN_DISCONNECT_;
 549     else
 550         disc_allowed = 0;
 551
 552     if ((pDCB->SyncMode & SYNC_ENABLE) && pDCB->TargetLUN == 0 && sdev->sdtr &&
 553         (((scmd->cmnd[0] == REQUEST_SENSE || (pSRB->SRBFlag & AUTO_REQSENSE)) &&
 554           !(pDCB->SyncMode & SYNC_NEGO_DONE)) || scmd->cmnd[0] == INQUIRY))
 555       try_sync_nego = 1;
 556     else
 557       try_sync_nego = 0;
 558
 559     pSRB->MsgCnt = 0;
 560     cmd = SEL_W_ATN;
 561     DC390_write8 (ScsiFifo, IDENTIFY(disc_allowed, pDCB->TargetLUN));
 562     /* Change 99/05/31: Don't use tags when not disconnecting (BUSY) */
 563     if ((pDCB->SyncMode & EN_TAG_QUEUEING) && disc_allowed && scsi_populate_tag_msg(scmd, tag)) {
 564         DC390_write8(ScsiFifo, tag[0]);
 565         pDCB->TagMask |= 1 << tag[1];
 566         pSRB->TagNumber = tag[1];
 567         DC390_write8(ScsiFifo, tag[1]);
 568         DEBUG1(printk(KERN_INFO "DC390: Select w/DisCn for SRB %p, block tag %02x\n", pSRB, tag[1]));
 569         cmd = SEL_W_ATN3;
 570     } else {
 571         /* No TagQ */
 572 //no_tag:
 573         DEBUG1(printk(KERN_INFO "DC390: Select w%s/DisCn for SRB %p, No TagQ\n", disc_allowed ? "" : "o", pSRB));
 574     }
 575
 576     pSRB->SRBState = SRB_START_;
 577
 578     if (try_sync_nego)
 579       {
 580         u8 Sync_Off = pDCB->SyncOffset;
 581         DEBUG0(printk (KERN_INFO "DC390: NEW Sync Nego code triggered (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN));
 582         pSRB->MsgOutBuf[0] = EXTENDED_MESSAGE;
 583         pSRB->MsgOutBuf[1] = 3;
 584         pSRB->MsgOutBuf[2] = EXTENDED_SDTR;
 585         pSRB->MsgOutBuf[3] = pDCB->NegoPeriod;
 586         if (!(Sync_Off & 0x0f)) Sync_Off = SYNC_NEGO_OFFSET;
 587         pSRB->MsgOutBuf[4] = Sync_Off;
 588         pSRB->MsgCnt = 5;
 589         //pSRB->SRBState = SRB_MSGOUT_;
 590         pSRB->SRBState |= DO_SYNC_NEGO;
 591         cmd = SEL_W_ATN_STOP;
 592       }
 593
 594     /* Command is written in CommandPhase, if SEL_W_ATN_STOP ... */
 595     if (cmd != SEL_W_ATN_STOP)
 596       {
 597         if( pSRB->SRBFlag & AUTO_REQSENSE )
 598           {
 599             DC390_write8 (ScsiFifo, REQUEST_SENSE);
 600             DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
 601             DC390_write8 (ScsiFifo, 0);
 602             DC390_write8 (ScsiFifo, 0);
 603             DC390_write8 (ScsiFifo, SCSI_SENSE_BUFFERSIZE);
 604             DC390_write8 (ScsiFifo, 0);
 605             DEBUG1(printk (KERN_DEBUG "DC390: AutoReqSense !\n"));
 606           }
 607         else    /* write cmnd to bus */
 608           {
 609             u8 *ptr; u8 i;
 610             ptr = (u8 *)scmd->cmnd;
 611             for (i = 0; i < scmd->cmd_len; i++)
 612               DC390_write8 (ScsiFifo, *(ptr++));
 613           }
 614       }
 615     DEBUG0(if (pACB->pActiveDCB)        \
 616            printk (KERN_WARNING "DC390: ActiveDCB != 0\n"));
 617     DEBUG0(if (pDCB->pActiveSRB)        \
 618            printk (KERN_WARNING "DC390: ActiveSRB != 0\n"));
 619     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
 620     if (DC390_read8 (Scsi_Status) & INTERRUPT)
 621     {
 622         dc390_freetag (pDCB, pSRB);
 623         DEBUG0(printk ("DC390: Interrupt during Start SCSI (target %02i-%02i)\n",
 624                 scmd->device->id, scmd->device->lun));
 625         pSRB->SRBState = SRB_READY;
 626         //DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 627         pACB->SelLost++;
 628         return 1;
 629     }
 630     DC390_write8 (ScsiCmd, cmd);
 631     pACB->pActiveDCB = pDCB;
 632     pDCB->pActiveSRB = pSRB;
 633     pACB->Connected = 1;
 634     pSRB->ScsiPhase = SCSI_NOP1;
 635     return 0;
 636 }
 637
 638
 639 static void __inline__
 640 dc390_InvalidCmd(struct dc390_acb* pACB)
 641 {
 642         if (pACB->pActiveDCB->pActiveSRB->SRBState & (SRB_START_ | SRB_MSGOUT))
 643                 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
 644 }
 645
 646
 647 static irqreturn_t __inline__
 648 DC390_Interrupt(void *dev_id)
 649 {
 650     struct dc390_acb *pACB = dev_id;
 651     struct dc390_dcb *pDCB;
 652     struct dc390_srb *pSRB;
 653     u8  sstatus=0;
 654     u8  phase;
 655     void   (*stateV)( struct dc390_acb*, struct dc390_srb*, u8 *);
 656     u8  istate, istatus;
 657
 658     sstatus = DC390_read8 (Scsi_Status);
 659     if( !(sstatus & INTERRUPT) )
 660         return IRQ_NONE;
 661
 662     DEBUG1(printk (KERN_DEBUG "sstatus=%02x,", sstatus));
 663
 664     //DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
 665     //dstatus = DC390_read8 (DMA_Status);
 666     //DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
 667
 668     spin_lock_irq(pACB->pScsiHost->host_lock);
 669
 670     istate = DC390_read8 (Intern_State);
 671     istatus = DC390_read8 (INT_Status); /* This clears Scsi_Status, Intern_State and INT_Status ! */
 672
 673     DEBUG1(printk (KERN_INFO "Istatus(Res,Inv,Dis,Serv,Succ,ReS,SelA,Sel)=%02x,",istatus));
 674     dc390_laststatus &= ~0x00ffffff;
 675     dc390_laststatus |= /* dstatus<<24 | */ sstatus<<16 | istate<<8 | istatus;
 676
 677     if (sstatus & ILLEGAL_OP_ERR)
 678     {
 679         printk ("DC390: Illegal Operation detected (%08x)!\n", dc390_laststatus);
 680         dc390_dumpinfo (pACB, pACB->pActiveDCB, pACB->pActiveDCB->pActiveSRB);
 681     }
 682
 683     else if (istatus &  INVALID_CMD)
 684     {
 685         printk ("DC390: Invalid Command detected (%08x)!\n", dc390_laststatus);
 686         dc390_InvalidCmd( pACB );
 687         goto unlock;
 688     }
 689
 690     if (istatus &  SCSI_RESET)
 691     {
 692         dc390_ScsiRstDetect( pACB );
 693         goto unlock;
 694     }
 695
 696     if (istatus &  DISCONNECTED)
 697     {
 698         dc390_Disconnect( pACB );
 699         goto unlock;
 700     }
 701
 702     if (istatus &  RESELECTED)
 703     {
 704         dc390_Reselect( pACB );
 705         goto unlock;
 706     }
 707
 708     else if (istatus & (SELECTED | SEL_ATTENTION))
 709     {
 710         printk (KERN_ERR "DC390: Target mode not supported!\n");
 711         goto unlock;
 712     }
 713
 714     if (istatus & (SUCCESSFUL_OP|SERVICE_REQUEST) )
 715     {
 716         pDCB = pACB->pActiveDCB;
 717         if (!pDCB)
 718         {
 719                 printk (KERN_ERR "DC390: Suc. op/ Serv. req: pActiveDCB = 0!\n");
 720                 goto unlock;
 721         }
 722         pSRB = pDCB->pActiveSRB;
 723         if( pDCB->DCBFlag & ABORT_DEV_ )
 724           dc390_EnableMsgOut_Abort (pACB, pSRB);
 725
 726         phase = pSRB->ScsiPhase;
 727         DEBUG1(printk (KERN_INFO "DC390: [%i]%s(0) (%02x)\n", phase, dc390_p0_str[phase], sstatus));
 728         stateV = (void *) dc390_phase0[phase];
 729         ( *stateV )( pACB, pSRB, &sstatus );
 730
 731         pSRB->ScsiPhase = sstatus & 7;
 732         phase = (u8) sstatus & 7;
 733         DEBUG1(printk (KERN_INFO "DC390: [%i]%s(1) (%02x)\n", phase, dc390_p1_str[phase], sstatus));
 734         stateV = (void *) dc390_phase1[phase];
 735         ( *stateV )( pACB, pSRB, &sstatus );
 736     }
 737
 738  unlock:
 739     spin_unlock_irq(pACB->pScsiHost->host_lock);
 740     return IRQ_HANDLED;
 741 }
 742
 743 static irqreturn_t do_DC390_Interrupt(int irq, void *dev_id)
 744 {
 745     irqreturn_t ret;
 746     DEBUG1(printk (KERN_INFO "DC390: Irq (%i) caught: ", irq));
 747     /* Locking is done in DC390_Interrupt */
 748     ret = DC390_Interrupt(dev_id);
 749     DEBUG1(printk (".. IRQ returned\n"));
 750     return ret;
 751 }
 752
 753 static void
 754 dc390_DataOut_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 755 {
 756     u8   sstatus;
 757     u32  ResidCnt;
 758     u8   dstate = 0;
 759
 760     sstatus = *psstatus;
 761
 762     if( !(pSRB->SRBState & SRB_XFERPAD) )
 763     {
 764         if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR) )
 765             pSRB->SRBStatus |= PARITY_ERROR;
 766
 767         if( sstatus & COUNT_2_ZERO )
 768         {
 769             unsigned long timeout = jiffies + HZ;
 770
 771             /* Function called from the ISR with the host_lock held and interrupts disabled */
 772             if (pSRB->SGToBeXferLen)
 773                 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
 774                     spin_unlock_irq(pACB->pScsiHost->host_lock);
 775                     udelay(50);
 776                     spin_lock_irq(pACB->pScsiHost->host_lock);
 777                 }
 778             if (!time_before(jiffies, timeout))
 779                 printk (KERN_CRIT "DC390: Deadlock in DataOut_0: DMA aborted unfinished: %06x bytes remain!!\n",
 780                         DC390_read32 (DMA_Wk_ByteCntr));
 781             dc390_laststatus &= ~0xff000000;
 782             dc390_laststatus |= dstate << 24;
 783             pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
 784             pSRB->SGIndex++;
 785             if( pSRB->SGIndex < pSRB->SGcount )
 786             {
 787                 pSRB->pSegmentList++;
 788
 789                 dc390_start_segment(pSRB);
 790             }
 791             else
 792                 pSRB->SGToBeXferLen = 0;
 793         }
 794         else
 795         {
 796             ResidCnt = ((u32) DC390_read8 (Current_Fifo) & 0x1f) +
 797                     (((u32) DC390_read8 (CtcReg_High) << 16) |
 798                      ((u32) DC390_read8 (CtcReg_Mid) << 8) |
 799                      (u32) DC390_read8 (CtcReg_Low));
 800
 801             dc390_advance_segment(pSRB, ResidCnt);
 802         }
 803     }
 804     if ((*psstatus & 7) != SCSI_DATA_OUT)
 805     {
 806             DC390_write8 (DMA_Cmd, WRITE_DIRECTION+DMA_IDLE_CMD);
 807             DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 808     }
 809 }
 810
 811 static void
 812 dc390_DataIn_0(struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 813 {
 814     u8   sstatus, residual, bval;
 815     u32  ResidCnt, i;
 816     unsigned long   xferCnt;
 817
 818     sstatus = *psstatus;
 819
 820     if( !(pSRB->SRBState & SRB_XFERPAD) )
 821     {
 822         if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR))
 823             pSRB->SRBStatus |= PARITY_ERROR;
 824
 825         if( sstatus & COUNT_2_ZERO )
 826         {
 827             int dstate = 0;
 828             unsigned long timeout = jiffies + HZ;
 829
 830             /* Function called from the ISR with the host_lock held and interrupts disabled */
 831             if (pSRB->SGToBeXferLen)
 832                 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
 833                     spin_unlock_irq(pACB->pScsiHost->host_lock);
 834                     udelay(50);
 835                     spin_lock_irq(pACB->pScsiHost->host_lock);
 836                 }
 837             if (!time_before(jiffies, timeout)) {
 838                 printk (KERN_CRIT "DC390: Deadlock in DataIn_0: DMA aborted unfinished: %06x bytes remain!!\n",
 839                         DC390_read32 (DMA_Wk_ByteCntr));
 840                 printk (KERN_CRIT "DC390: DataIn_0: DMA State: %i\n", dstate);
 841             }
 842             dc390_laststatus &= ~0xff000000;
 843             dc390_laststatus |= dstate << 24;
 844             DEBUG1(ResidCnt = ((unsigned long) DC390_read8 (CtcReg_High) << 16) \
 845                 + ((unsigned long) DC390_read8 (CtcReg_Mid) << 8)               \
 846                 + ((unsigned long) DC390_read8 (CtcReg_Low)));
 847             DEBUG1(printk (KERN_DEBUG "Count_2_Zero (ResidCnt=%u,ToBeXfer=%lu),", ResidCnt, pSRB->SGToBeXferLen));
 848
 849             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
 850
 851             pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
 852             pSRB->SGIndex++;
 853             if( pSRB->SGIndex < pSRB->SGcount )
 854             {
 855                 pSRB->pSegmentList++;
 856
 857                 dc390_start_segment(pSRB);
 858             }
 859             else
 860                 pSRB->SGToBeXferLen = 0;
 861         }
 862         else    /* phase changed */
 863         {
 864             residual = 0;
 865             bval = DC390_read8 (Current_Fifo);
 866             while( bval & 0x1f )
 867             {
 868                 DEBUG1(printk (KERN_DEBUG "Check for residuals,"));
 869                 if( (bval & 0x1f) == 1 )
 870                 {
 871                     for(i=0; i < 0x100; i++)
 872                     {
 873                         bval = DC390_read8 (Current_Fifo);
 874                         if( !(bval & 0x1f) )
 875                             goto din_1;
 876                         else if( i == 0x0ff )
 877                         {
 878                             residual = 1;   /* ;1 residual byte */
 879                             goto din_1;
 880                         }
 881                     }
 882                 }
 883                 else
 884                     bval = DC390_read8 (Current_Fifo);
 885             }
 886 din_1:
 887             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_BLAST_CMD);
 888             for (i = 0xa000; i; i--)
 889             {
 890                 bval = DC390_read8 (DMA_Status);
 891                 if (bval & BLAST_COMPLETE)
 892                     break;
 893             }
 894             /* It seems a DMA Blast abort isn't that bad ... */
 895             if (!i) printk (KERN_ERR "DC390: DMA Blast aborted unfinished!\n");
 896             //DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
 897             dc390_laststatus &= ~0xff000000;
 898             dc390_laststatus |= bval << 24;
 899
 900             DEBUG1(printk (KERN_DEBUG "Blast: Read %i times DMA_Status %02x", 0xa000-i, bval));
 901             ResidCnt = (((u32) DC390_read8 (CtcReg_High) << 16) |
 902                         ((u32) DC390_read8 (CtcReg_Mid) << 8)) |
 903                     (u32) DC390_read8 (CtcReg_Low);
 904
 905             xferCnt = dc390_advance_segment(pSRB, ResidCnt);
 906
 907             if (residual) {
 908                 size_t count = 1;
 909                 size_t offset = pSRB->SGBusAddr - sg_dma_address(pSRB->pSegmentList);
 910                 unsigned long flags;
 911                 u8 *ptr;
 912
 913                 bval = DC390_read8 (ScsiFifo);      /* get one residual byte */
 914
 915                 local_irq_save(flags);
 916                 ptr = scsi_kmap_atomic_sg(pSRB->pSegmentList, pSRB->SGcount, &offset, &count);
 917                 if (likely(ptr)) {
 918                         *(ptr + offset) = bval;
 919                         scsi_kunmap_atomic_sg(ptr);
 920                 }
 921                 local_irq_restore(flags);
 922                 WARN_ON(!ptr);
 923
 924                 /* 1 more byte read */
 925                 xferCnt += dc390_advance_segment(pSRB, pSRB->SGToBeXferLen - 1);
 926             }
 927             DEBUG1(printk (KERN_DEBUG "Xfered: %lu, Total: %lu, Remaining: %lu\n", xferCnt,\
 928                            pSRB->TotalXferredLen, pSRB->SGToBeXferLen));
 929         }
 930     }
 931     if ((*psstatus & 7) != SCSI_DATA_IN)
 932     {
 933             DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 934             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
 935     }
 936 }
 937
 938 static void
 939 dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 940 {
 941 }
 942
 943 static void
 944 dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 945 {
 946
 947     pSRB->TargetStatus = DC390_read8 (ScsiFifo);
 948     //udelay (1);
 949     pSRB->EndMessage = DC390_read8 (ScsiFifo);  /* get message */
 950
 951     *psstatus = SCSI_NOP0;
 952     pSRB->SRBState = SRB_COMPLETED;
 953     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
 954 }
 955
 956 static void
 957 dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 958 {
 959     if( pSRB->SRBState & (SRB_UNEXPECT_RESEL+SRB_ABORT_SENT) )
 960         *psstatus = SCSI_NOP0;
 961     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
 962 }
 963
 964
 965 static void __inline__
 966 dc390_reprog (struct dc390_acb* pACB, struct dc390_dcb* pDCB)
 967 {
 968   DC390_write8 (Sync_Period, pDCB->SyncPeriod);
 969   DC390_write8 (Sync_Offset, pDCB->SyncOffset);
 970   DC390_write8 (CtrlReg3, pDCB->CtrlR3);
 971   DC390_write8 (CtrlReg4, pDCB->CtrlR4);
 972   dc390_SetXferRate (pACB, pDCB);
 973 }
 974
 975
 976 #ifdef DC390_DEBUG0
 977 static void
 978 dc390_printMsg (u8 *MsgBuf, u8 len)
 979 {
 980   int i;
 981   printk (" %02x", MsgBuf[0]);
 982   for (i = 1; i < len; i++)
 983     printk (" %02x", MsgBuf[i]);
 984   printk ("\n");
 985 }
 986 #endif
 987
 988 #define DC390_ENABLE_MSGOUT DC390_write8 (ScsiCmd, SET_ATN_CMD)
 989
 990 /* reject_msg */
 991 static void __inline__
 992 dc390_MsgIn_reject (struct dc390_acb* pACB, struct dc390_srb* pSRB)
 993 {
 994   pSRB->MsgOutBuf[0] = MESSAGE_REJECT;
 995   pSRB->MsgCnt = 1;
 996   DC390_ENABLE_MSGOUT;
 997   DEBUG0 (printk (KERN_INFO "DC390: Reject message\n"));
 998 }
 999
1000 /* abort command */
1001 static void
1002 dc390_EnableMsgOut_Abort ( struct dc390_acb* pACB, struct dc390_srb* pSRB )
1003 {
1004     pSRB->MsgOutBuf[0] = ABORT;
1005     pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1006     pSRB->pSRBDCB->DCBFlag &= ~ABORT_DEV_;
1007 }
1008
1009 static struct dc390_srb*
1010 dc390_MsgIn_QTag (struct dc390_acb* pACB, struct dc390_dcb* pDCB, s8 tag)
1011 {
1012   struct dc390_srb* pSRB = pDCB->pGoingSRB;
1013
1014   if (pSRB)
1015     {
1016         struct scsi_cmnd *scmd = scsi_find_tag(pSRB->pcmd->device, tag);
1017         pSRB = (struct dc390_srb *)scmd->host_scribble;
1018
1019         if (pDCB->DCBFlag & ABORT_DEV_)
1020         {
1021           pSRB->SRBState = SRB_ABORT_SENT;
1022           dc390_EnableMsgOut_Abort( pACB, pSRB );
1023         }
1024
1025         if (!(pSRB->SRBState & SRB_DISCONNECT))
1026                 goto mingx0;
1027
1028         pDCB->pActiveSRB = pSRB;
1029         pSRB->SRBState = SRB_DATA_XFER;
1030     }
1031   else
1032     {
1033     mingx0:
1034       pSRB = pACB->pTmpSRB;
1035       pSRB->SRBState = SRB_UNEXPECT_RESEL;
1036       pDCB->pActiveSRB = pSRB;
1037       pSRB->MsgOutBuf[0] = ABORT_TAG;
1038       pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1039     }
1040   return pSRB;
1041 }
1042
1043
1044 /* set async transfer mode */
1045 static void
1046 dc390_MsgIn_set_async (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1047 {
1048   struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1049   if (!(pSRB->SRBState & DO_SYNC_NEGO))
1050     printk (KERN_INFO "DC390: Target %i initiates Non-Sync?\n", pDCB->TargetID);
1051   pSRB->SRBState &= ~DO_SYNC_NEGO;
1052   pDCB->SyncMode &= ~(SYNC_ENABLE+SYNC_NEGO_DONE);
1053   pDCB->SyncPeriod = 0;
1054   pDCB->SyncOffset = 0;
1055   //pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1056   pDCB->CtrlR3 = FAST_CLK;      /* fast clock / normal scsi */
1057   pDCB->CtrlR4 &= 0x3f;
1058   pDCB->CtrlR4 |= pACB->glitch_cfg;     /* glitch eater */
1059   dc390_reprog (pACB, pDCB);
1060 }
1061
1062 /* set sync transfer mode */
1063 static void
1064 dc390_MsgIn_set_sync (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1065 {
1066   u8 bval;
1067   u16 wval, wval1;
1068   struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1069   u8 oldsyncperiod = pDCB->SyncPeriod;
1070   u8 oldsyncoffset = pDCB->SyncOffset;
1071
1072   if (!(pSRB->SRBState & DO_SYNC_NEGO))
1073     {
1074       printk (KERN_INFO "DC390: Target %i initiates Sync: %ins %i ... answer ...\n",
1075               pDCB->TargetID, pSRB->MsgInBuf[3]<<2, pSRB->MsgInBuf[4]);
1076
1077       /* reject */
1078       //dc390_MsgIn_reject (pACB, pSRB);
1079       //return dc390_MsgIn_set_async (pACB, pSRB);
1080
1081       /* Reply with corrected SDTR Message */
1082       if (pSRB->MsgInBuf[4] > 15)
1083         {
1084           printk (KERN_INFO "DC390: Lower Sync Offset to 15\n");
1085           pSRB->MsgInBuf[4] = 15;
1086         }
1087       if (pSRB->MsgInBuf[3] < pDCB->NegoPeriod)
1088         {
1089           printk (KERN_INFO "DC390: Set sync nego period to %ins\n", pDCB->NegoPeriod << 2);
1090           pSRB->MsgInBuf[3] = pDCB->NegoPeriod;
1091         }
1092       memcpy (pSRB->MsgOutBuf, pSRB->MsgInBuf, 5);
1093       pSRB->MsgCnt = 5;
1094       DC390_ENABLE_MSGOUT;
1095     }
1096
1097   pSRB->SRBState &= ~DO_SYNC_NEGO;
1098   pDCB->SyncMode |= SYNC_ENABLE+SYNC_NEGO_DONE;
1099   pDCB->SyncOffset &= 0x0f0;
1100   pDCB->SyncOffset |= pSRB->MsgInBuf[4];
1101   pDCB->NegoPeriod = pSRB->MsgInBuf[3];
1102
1103   wval = (u16) pSRB->MsgInBuf[3];
1104   wval = wval << 2; wval -= 3; wval1 = wval / 25;       /* compute speed */
1105   if( (wval1 * 25) != wval) wval1++;
1106   bval = FAST_CLK+FAST_SCSI;    /* fast clock / fast scsi */
1107
1108   pDCB->CtrlR4 &= 0x3f;         /* Glitch eater: 12ns less than normal */
1109   if (pACB->glitch_cfg != NS_TO_GLITCH(0))
1110     pDCB->CtrlR4 |= NS_TO_GLITCH(((GLITCH_TO_NS(pACB->glitch_cfg)) - 1));
1111   else
1112     pDCB->CtrlR4 |= NS_TO_GLITCH(0);
1113   if (wval1 < 4) pDCB->CtrlR4 |= NS_TO_GLITCH(0); /* Ultra */
1114
1115   if (wval1 >= 8)
1116     {
1117       wval1--;  /* Timing computation differs by 1 from FAST_SCSI */
1118       bval = FAST_CLK;          /* fast clock / normal scsi */
1119       pDCB->CtrlR4 |= pACB->glitch_cfg;         /* glitch eater */
1120     }
1121
1122   pDCB->CtrlR3 = bval;
1123   pDCB->SyncPeriod = (u8)wval1;
1124
1125   if ((oldsyncperiod != wval1 || oldsyncoffset != pDCB->SyncOffset) && pDCB->TargetLUN == 0)
1126     {
1127       if (! (bval & FAST_SCSI)) wval1++;
1128       printk (KERN_INFO "DC390: Target %i: Sync transfer %i.%1i MHz, Offset %i\n", pDCB->TargetID,
1129               40/wval1, ((40%wval1)*10+wval1/2)/wval1, pDCB->SyncOffset & 0x0f);
1130     }
1131
1132   dc390_reprog (pACB, pDCB);
1133 }
1134
1135
1136 /* handle RESTORE_PTR */
1137 /* This doesn't look very healthy... to-be-fixed */
1138 static void
1139 dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1140 {
1141     struct scsi_cmnd *pcmd = pSRB->pcmd;
1142     struct scatterlist *psgl;
1143     pSRB->TotalXferredLen = 0;
1144     pSRB->SGIndex = 0;
1145     if (scsi_sg_count(pcmd)) {
1146         size_t saved;
1147         pSRB->pSegmentList = scsi_sglist(pcmd);
1148         psgl = pSRB->pSegmentList;
1149         //dc390_pci_sync(pSRB);
1150
1151         while (pSRB->TotalXferredLen + (unsigned long) sg_dma_len(psgl) < pSRB->Saved_Ptr)
1152         {
1153             pSRB->TotalXferredLen += (unsigned long) sg_dma_len(psgl);
1154             pSRB->SGIndex++;
1155             if( pSRB->SGIndex < pSRB->SGcount )
1156             {
1157                 pSRB->pSegmentList++;
1158
1159                 dc390_start_segment(pSRB);
1160             }
1161             else
1162                 pSRB->SGToBeXferLen = 0;
1163         }
1164
1165         saved = pSRB->Saved_Ptr - pSRB->TotalXferredLen;
1166         pSRB->SGToBeXferLen -= saved;
1167         pSRB->SGBusAddr += saved;
1168         printk (KERN_INFO "DC390: Pointer restored. Segment %i, Total %li, Bus %08lx\n",
1169                 pSRB->SGIndex, pSRB->Saved_Ptr, pSRB->SGBusAddr);
1170
1171     } else {
1172          pSRB->SGcount = 0;
1173          printk (KERN_INFO "DC390: RESTORE_PTR message for Transfer without Scatter-Gather ??\n");
1174     }
1175
1176   pSRB->TotalXferredLen = pSRB->Saved_Ptr;
1177 }
1178
1179
1180 /* According to the docs, the AM53C974 reads the message and
1181  * generates a Successful Operation IRQ before asserting ACK for
1182  * the last byte (how does it know whether it's the last ?) */
1183 /* The old code handled it in another way, indicating, that on
1184  * every message byte an IRQ is generated and every byte has to
1185  * be manually ACKed. Hmmm ?  (KG, 98/11/28) */
1186 /* The old implementation was correct. Sigh! */
1187
1188 /* Check if the message is complete */
1189 static u8 __inline__
1190 dc390_MsgIn_complete (u8 *msgbuf, u32 len)
1191 {
1192   if (*msgbuf == EXTENDED_MESSAGE)
1193   {
1194         if (len < 2) return 0;
1195         if (len < msgbuf[1] + 2) return 0;
1196   }
1197   else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) // two byte messages
1198         if (len < 2) return 0;
1199   return 1;
1200 }
1201
1202
1203
1204 /* read and eval received messages */
1205 static void
1206 dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1207 {
1208     struct dc390_dcb*   pDCB = pACB->pActiveDCB;
1209
1210     /* Read the msg */
1211
1212     pSRB->MsgInBuf[pACB->MsgLen++] = DC390_read8 (ScsiFifo);
1213     //pSRB->SRBState = 0;
1214
1215     /* Msg complete ? */
1216     if (dc390_MsgIn_complete (pSRB->MsgInBuf, pACB->MsgLen))
1217       {
1218         DEBUG0 (printk (KERN_INFO "DC390: MsgIn:"); dc390_printMsg (pSRB->MsgInBuf, pACB->MsgLen));
1219         /* Now eval the msg */
1220         switch (pSRB->MsgInBuf[0])
1221           {
1222           case DISCONNECT:
1223             pSRB->SRBState = SRB_DISCONNECT; break;
1224
1225           case SIMPLE_QUEUE_TAG:
1226           case HEAD_OF_QUEUE_TAG:
1227           case ORDERED_QUEUE_TAG:
1228             pSRB = dc390_MsgIn_QTag (pACB, pDCB, pSRB->MsgInBuf[1]);
1229             break;
1230
1231           case MESSAGE_REJECT:
1232             DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1233             pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1234             if( pSRB->SRBState & DO_SYNC_NEGO)
1235               dc390_MsgIn_set_async (pACB, pSRB);
1236             break;
1237
1238           case EXTENDED_MESSAGE:
1239             /* reject every extended msg but SDTR */
1240             if (pSRB->MsgInBuf[1] != 3 || pSRB->MsgInBuf[2] != EXTENDED_SDTR)
1241               dc390_MsgIn_reject (pACB, pSRB);
1242             else
1243               {
1244                 if (pSRB->MsgInBuf[3] == 0 || pSRB->MsgInBuf[4] == 0)
1245                   dc390_MsgIn_set_async (pACB, pSRB);
1246                 else
1247                   dc390_MsgIn_set_sync (pACB, pSRB);
1248               }
1249
1250             // nothing has to be done
1251           case COMMAND_COMPLETE: break;
1252
1253             // SAVE POINTER may be ignored as we have the struct dc390_srb* associated with the
1254             // scsi command. Thanks, Gerard, for pointing it out.
1255           case SAVE_POINTERS:
1256             pSRB->Saved_Ptr = pSRB->TotalXferredLen;
1257             break;
1258             // The device might want to restart transfer with a RESTORE
1259           case RESTORE_POINTERS:
1260             DEBUG0(printk ("DC390: RESTORE POINTER message received ... try to handle\n"));
1261             dc390_restore_ptr (pACB, pSRB);
1262             break;
1263
1264             // reject unknown messages
1265           default: dc390_MsgIn_reject (pACB, pSRB);
1266           }
1267
1268         /* Clear counter and MsgIn state */
1269         pSRB->SRBState &= ~SRB_MSGIN;
1270         pACB->MsgLen = 0;
1271       }
1272
1273     *psstatus = SCSI_NOP0;
1274     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
1275     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1276 }
1277
1278
1279 static void
1280 dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
1281 {
1282     unsigned long  lval;
1283     struct dc390_dcb*   pDCB = pACB->pActiveDCB;
1284
1285     if (pSRB == pACB->pTmpSRB)
1286     {
1287         if (pDCB)
1288                 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (%02i-%i)\n", pDCB->TargetID, pDCB->TargetLUN);
1289         else
1290                 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (DCB 0!)\n");
1291
1292         /* Try to recover - some broken disks react badly to tagged INQUIRY */
1293         if (pDCB && pACB->scan_devices && pDCB->GoingSRBCnt == 1) {
1294                 pSRB = pDCB->pGoingSRB;
1295                 pDCB->pActiveSRB = pSRB;
1296         } else {
1297                 pSRB->pSRBDCB = pDCB;
1298                 dc390_EnableMsgOut_Abort(pACB, pSRB);
1299                 if (pDCB)
1300                         pDCB->DCBFlag |= ABORT_DEV;
1301                 return;
1302         }
1303     }
1304
1305     if( pSRB->SGIndex < pSRB->SGcount )
1306     {
1307         DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1308         if( !pSRB->SGToBeXferLen )
1309         {
1310             dc390_start_segment(pSRB);
1311
1312             DEBUG1(printk (KERN_DEBUG " DC390: Next SG segment."));
1313         }
1314         lval = pSRB->SGToBeXferLen;
1315         DEBUG1(printk (KERN_DEBUG " DC390: Start transfer: %li bytes (address %08lx)\n", lval, pSRB->SGBusAddr));
1316         DC390_write8 (CtcReg_Low, (u8) lval);
1317         lval >>= 8;
1318         DC390_write8 (CtcReg_Mid, (u8) lval);
1319         lval >>= 8;
1320         DC390_write8 (CtcReg_High, (u8) lval);
1321
1322         DC390_write32 (DMA_XferCnt, pSRB->SGToBeXferLen);
1323         DC390_write32 (DMA_XferAddr, pSRB->SGBusAddr);
1324
1325         //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1326         pSRB->SRBState = SRB_DATA_XFER;
1327
1328         DC390_write8 (ScsiCmd, DMA_COMMAND+INFO_XFER_CMD);
1329
1330         DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1331         //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT));
1332         //DEBUG1(printk (KERN_DEBUG "DC390: DMA_Status: %02x\n", DC390_read8 (DMA_Status)));
1333         //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT));
1334     }
1335     else    /* xfer pad */
1336     {
1337         if( pSRB->SGcount )
1338         {
1339             pSRB->AdaptStatus = H_OVER_UNDER_RUN;
1340             pSRB->SRBStatus |= OVER_RUN;
1341             DEBUG0(printk (KERN_WARNING " DC390: Overrun -"));
1342         }
1343         DEBUG0(printk (KERN_WARNING " Clear transfer pad \n"));
1344         DC390_write8 (CtcReg_Low, 0);
1345         DC390_write8 (CtcReg_Mid, 0);
1346         DC390_write8 (CtcReg_High, 0);
1347
1348         pSRB->SRBState |= SRB_XFERPAD;
1349         DC390_write8 (ScsiCmd, DMA_COMMAND+XFER_PAD_BYTE);
1350 /*
1351         DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir);
1352         DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir);
1353 */
1354     }
1355 }
1356
1357
1358 static void
1359 dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1360 {
1361     dc390_DataIO_Comm (pACB, pSRB, WRITE_DIRECTION);
1362 }
1363
1364 static void
1365 dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1366 {
1367     dc390_DataIO_Comm (pACB, pSRB, READ_DIRECTION);
1368 }
1369
1370 static void
1371 dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1372 {
1373     struct dc390_dcb*   pDCB;
1374     u8  i, cnt;
1375     u8     *ptr;
1376
1377     DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1378     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1379     if( !(pSRB->SRBFlag & AUTO_REQSENSE) )
1380     {
1381         cnt = (u8) pSRB->pcmd->cmd_len;
1382         ptr = (u8 *) pSRB->pcmd->cmnd;
1383         for(i=0; i < cnt; i++)
1384             DC390_write8 (ScsiFifo, *(ptr++));
1385     }
1386     else
1387     {
1388         DC390_write8 (ScsiFifo, REQUEST_SENSE);
1389         pDCB = pACB->pActiveDCB;
1390         DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
1391         DC390_write8 (ScsiFifo, 0);
1392         DC390_write8 (ScsiFifo, 0);
1393         DC390_write8 (ScsiFifo, SCSI_SENSE_BUFFERSIZE);
1394         DC390_write8 (ScsiFifo, 0);
1395         DEBUG0(printk(KERN_DEBUG "DC390: AutoReqSense (CmndPhase)!\n"));
1396     }
1397     pSRB->SRBState = SRB_COMMAND;
1398     DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1399 }
1400
1401 static void
1402 dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1403 {
1404     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1405     pSRB->SRBState = SRB_STATUS;
1406     DC390_write8 (ScsiCmd, INITIATOR_CMD_CMPLTE);
1407     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1408 }
1409
1410 static void
1411 dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1412 {
1413     u8   bval, i, cnt;
1414     u8     *ptr;
1415     struct dc390_dcb*    pDCB;
1416
1417     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1418     pDCB = pACB->pActiveDCB;
1419     if( !(pSRB->SRBState & SRB_MSGOUT) )
1420     {
1421         cnt = pSRB->MsgCnt;
1422         if( cnt )
1423         {
1424             ptr = (u8 *) pSRB->MsgOutBuf;
1425             for(i=0; i < cnt; i++)
1426                 DC390_write8 (ScsiFifo, *(ptr++));
1427             pSRB->MsgCnt = 0;
1428             if( (pDCB->DCBFlag & ABORT_DEV_) &&
1429                 (pSRB->MsgOutBuf[0] == ABORT) )
1430                 pSRB->SRBState = SRB_ABORT_SENT;
1431         }
1432         else
1433         {
1434             bval = ABORT;       /* ??? MSG_NOP */
1435             if( (pSRB->pcmd->cmnd[0] == INQUIRY ) ||
1436                 (pSRB->pcmd->cmnd[0] == REQUEST_SENSE) ||
1437                 (pSRB->SRBFlag & AUTO_REQSENSE) )
1438             {
1439                 if( pDCB->SyncMode & SYNC_ENABLE )
1440                     goto  mop1;
1441             }
1442             DC390_write8 (ScsiFifo, bval);
1443         }
1444         DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1445     }
1446     else
1447     {
1448 mop1:
1449         printk (KERN_ERR "DC390: OLD Sync Nego code triggered! (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN);
1450         DC390_write8 (ScsiFifo, EXTENDED_MESSAGE);
1451         DC390_write8 (ScsiFifo, 3);     /*    ;length of extended msg */
1452         DC390_write8 (ScsiFifo, EXTENDED_SDTR); /*    ; sync nego */
1453         DC390_write8 (ScsiFifo, pDCB->NegoPeriod);
1454         if (pDCB->SyncOffset & 0x0f)
1455                     DC390_write8 (ScsiFifo, pDCB->SyncOffset);
1456         else
1457                     DC390_write8 (ScsiFifo, SYNC_NEGO_OFFSET);
1458         pSRB->SRBState |= DO_SYNC_NEGO;
1459         DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1460     }
1461 }
1462
1463 static void
1464 dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1465 {
1466     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1467     if( !(pSRB->SRBState & SRB_MSGIN) )
1468     {
1469         pSRB->SRBState &= ~SRB_DISCONNECT;
1470         pSRB->SRBState |= SRB_MSGIN;
1471     }
1472     DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1473     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1474 }
1475
1476 static void
1477 dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1478 {
1479 }
1480
1481 static void
1482 dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1483 {
1484 }
1485
1486
1487 static void
1488 dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB )
1489 {
1490     u8  bval, i, cnt;
1491     struct dc390_dcb*   ptr;
1492
1493     if( !(pDCB->TargetLUN) )
1494     {
1495         if( !pACB->scan_devices )
1496         {
1497             ptr = pACB->pLinkDCB;
1498             cnt = pACB->DCBCnt;
1499             bval = pDCB->TargetID;
1500             for(i=0; i<cnt; i++)
1501             {
1502                 if( ptr->TargetID == bval )
1503                 {
1504                     ptr->SyncPeriod = pDCB->SyncPeriod;
1505                     ptr->SyncOffset = pDCB->SyncOffset;
1506                     ptr->CtrlR3 = pDCB->CtrlR3;
1507                     ptr->CtrlR4 = pDCB->CtrlR4;
1508                     ptr->SyncMode = pDCB->SyncMode;
1509                 }
1510                 ptr = ptr->pNextDCB;
1511             }
1512         }
1513     }
1514     return;
1515 }
1516
1517
1518 static void
1519 dc390_Disconnect( struct dc390_acb* pACB )
1520 {
1521     struct dc390_dcb *pDCB;
1522     struct dc390_srb *pSRB, *psrb;
1523     u8  i, cnt;
1524
1525     DEBUG0(printk(KERN_INFO "DISC,"));
1526
1527     if (!pACB->Connected) printk(KERN_ERR "DC390: Disconnect not-connected bus?\n");
1528     pACB->Connected = 0;
1529     pDCB = pACB->pActiveDCB;
1530     if (!pDCB)
1531      {
1532         DEBUG0(printk(KERN_ERR "ACB:%p->ActiveDCB:%p IOPort:%04x IRQ:%02x !\n",\
1533                pACB, pDCB, pACB->IOPortBase, pACB->IRQLevel));
1534         mdelay(400);
1535         DC390_read8 (INT_Status);       /* Reset Pending INT */
1536         DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1537         return;
1538      }
1539     DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1540     pSRB = pDCB->pActiveSRB;
1541     pACB->pActiveDCB = NULL;
1542     pSRB->ScsiPhase = SCSI_NOP0;
1543     if( pSRB->SRBState & SRB_UNEXPECT_RESEL )
1544         pSRB->SRBState = 0;
1545     else if( pSRB->SRBState & SRB_ABORT_SENT )
1546     {
1547         pDCB->TagMask = 0;
1548         pDCB->DCBFlag = 0;
1549         cnt = pDCB->GoingSRBCnt;
1550         pDCB->GoingSRBCnt = 0;
1551         pSRB = pDCB->pGoingSRB;
1552         for( i=0; i < cnt; i++)
1553         {
1554             psrb = pSRB->pNextSRB;
1555             dc390_Free_insert (pACB, pSRB);
1556             pSRB = psrb;
1557         }
1558         pDCB->pGoingSRB = NULL;
1559     }
1560     else
1561     {
1562         if( (pSRB->SRBState & (SRB_START_+SRB_MSGOUT)) ||
1563            !(pSRB->SRBState & (SRB_DISCONNECT+SRB_COMPLETED)) )
1564         {       /* Selection time out */
1565                 pSRB->AdaptStatus = H_SEL_TIMEOUT;
1566                 pSRB->TargetStatus = 0;
1567                 goto  disc1;
1568         }
1569         else if (!(pSRB->SRBState & SRB_DISCONNECT) && (pSRB->SRBState & SRB_COMPLETED))
1570         {
1571 disc1:
1572             dc390_freetag (pDCB, pSRB);
1573             pDCB->pActiveSRB = NULL;
1574             pSRB->SRBState = SRB_FREE;
1575             dc390_SRBdone( pACB, pDCB, pSRB);
1576         }
1577     }
1578     pACB->MsgLen = 0;
1579 }
1580
1581
1582 static void
1583 dc390_Reselect( struct dc390_acb* pACB )
1584 {
1585     struct dc390_dcb*   pDCB;
1586     struct dc390_srb*   pSRB;
1587     u8  id, lun;
1588
1589     DEBUG0(printk(KERN_INFO "RSEL,"));
1590     pACB->Connected = 1;
1591     pDCB = pACB->pActiveDCB;
1592     if( pDCB )
1593     {   /* Arbitration lost but Reselection won */
1594         DEBUG0(printk ("DC390: (ActiveDCB != 0: Arb. lost but resel. won)!\n"));
1595         pSRB = pDCB->pActiveSRB;
1596         if( !( pACB->scan_devices ) )
1597         {
1598             struct scsi_cmnd *pcmd = pSRB->pcmd;
1599             scsi_set_resid(pcmd, scsi_bufflen(pcmd));
1600             SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1601             dc390_Going_remove(pDCB, pSRB);
1602             dc390_Free_insert(pACB, pSRB);
1603             pcmd->scsi_done (pcmd);
1604             DEBUG0(printk(KERN_DEBUG"DC390: Return SRB %p to free\n", pSRB));
1605         }
1606     }
1607     /* Get ID */
1608     lun = DC390_read8 (ScsiFifo);
1609     DEBUG0(printk ("Dev %02x,", lun));
1610     if (!(lun & (1 << pACB->pScsiHost->this_id)))
1611       printk (KERN_ERR "DC390: Reselection must select host adapter: %02x!\n", lun);
1612     else
1613       lun ^= 1 << pACB->pScsiHost->this_id; /* Mask AdapterID */
1614     id = 0; while (lun >>= 1) id++;
1615     /* Get LUN */
1616     lun = DC390_read8 (ScsiFifo);
1617     if (!(lun & IDENTIFY_BASE)) printk (KERN_ERR "DC390: Resel: Expect identify message!\n");
1618     lun &= 7;
1619     DEBUG0(printk ("(%02i-%i),", id, lun));
1620     pDCB = dc390_findDCB (pACB, id, lun);
1621     if (!pDCB)
1622     {
1623         printk (KERN_ERR "DC390: Reselect from non existing device (%02i-%i)\n",
1624                     id, lun);
1625         return;
1626     }
1627     pACB->pActiveDCB = pDCB;
1628     /* TagQ: We expect a message soon, so never mind the exact SRB */
1629     if( pDCB->SyncMode & EN_TAG_QUEUEING )
1630     {
1631         pSRB = pACB->pTmpSRB;
1632         pDCB->pActiveSRB = pSRB;
1633     }
1634     else
1635     {
1636         pSRB = pDCB->pActiveSRB;
1637         if( !pSRB || !(pSRB->SRBState & SRB_DISCONNECT) )
1638         {
1639             pSRB= pACB->pTmpSRB;
1640             pSRB->SRBState = SRB_UNEXPECT_RESEL;
1641             printk (KERN_ERR "DC390: Reselect without outstanding cmnd (%02i-%i)\n",
1642                     id, lun);
1643             pDCB->pActiveSRB = pSRB;
1644             dc390_EnableMsgOut_Abort ( pACB, pSRB );
1645         }
1646         else
1647         {
1648             if( pDCB->DCBFlag & ABORT_DEV_ )
1649             {
1650                 pSRB->SRBState = SRB_ABORT_SENT;
1651                 printk (KERN_INFO "DC390: Reselect: Abort (%02i-%i)\n",
1652                         id, lun);
1653                 dc390_EnableMsgOut_Abort( pACB, pSRB );
1654             }
1655             else
1656                 pSRB->SRBState = SRB_DATA_XFER;
1657         }
1658     }
1659
1660     DEBUG1(printk (KERN_DEBUG "Resel SRB(%p): TagNum (%02x)\n", pSRB, pSRB->TagNumber));
1661     pSRB->ScsiPhase = SCSI_NOP0;
1662     DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
1663     DC390_write8 (Sync_Period, pDCB->SyncPeriod);
1664     DC390_write8 (Sync_Offset, pDCB->SyncOffset);
1665     DC390_write8 (CtrlReg1, pDCB->CtrlR1);
1666     DC390_write8 (CtrlReg3, pDCB->CtrlR3);
1667     DC390_write8 (CtrlReg4, pDCB->CtrlR4);      /* ; Glitch eater */
1668     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);   /* ;to release the /ACK signal */
1669 }
1670
1671 static int __inline__
1672 dc390_RequestSense(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1673 {
1674         struct scsi_cmnd *pcmd;
1675
1676         pcmd = pSRB->pcmd;
1677
1678         REMOVABLEDEBUG(printk(KERN_INFO "DC390: RequestSense(Cmd %02x, Id %02x, LUN %02x)\n",\
1679                               pcmd->cmnd[0], pDCB->TargetID, pDCB->TargetLUN));
1680
1681         pSRB->SRBFlag |= AUTO_REQSENSE;
1682         pSRB->SavedTotXLen = pSRB->TotalXferredLen;
1683         pSRB->AdaptStatus = 0;
1684         pSRB->TargetStatus = 0; /* CHECK_CONDITION<<1; */
1685
1686         /* We are called from SRBdone, original PCI mapping has been removed
1687          * already, new one is set up from StartSCSI */
1688         pSRB->SGIndex = 0;
1689
1690         pSRB->TotalXferredLen = 0;
1691         pSRB->SGToBeXferLen = 0;
1692         return dc390_StartSCSI(pACB, pDCB, pSRB);
1693 }
1694
1695
1696 static void
1697 dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
1698 {
1699     u8 status;
1700     struct scsi_cmnd *pcmd;
1701
1702     pcmd = pSRB->pcmd;
1703     /* KG: Moved pci_unmap here */
1704     dc390_pci_unmap(pSRB);
1705
1706     status = pSRB->TargetStatus;
1707
1708     DEBUG0(printk (" SRBdone (%02x,%08x), SRB %p\n", status, pcmd->result, pSRB));
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 (%02x), target %02i-%02i\n", 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 (%02x), target %02i-%02i\n", 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
1796 cmd_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\n"));
1804     pcmd->scsi_done (pcmd);
1805
1806     return;
1807 }
1808
1809
1810 /* Remove all SRBs from Going list and inform midlevel */
1811 static void
1812 dc390_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
1840 static void
1841 dc390_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
1855 static void
1856 dc390_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
1885 static int DC390_queuecommand_lck(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
1946 static DEF_SCSI_QCMD(DC390_queuecommand)
1947
1948 static void dc390_dumpinfo (struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1949 {
1950     struct pci_dev *pdev;
1951     u16 pstat;
1952
1953     if (!pDCB) pDCB = pACB->pActiveDCB;
1954     if (!pSRB && pDCB) pSRB = pDCB->pActiveSRB;
1955
1956     if (pSRB)
1957     {
1958         printk ("DC390: SRB: Xferred %08lx, Remain %08lx, State %08x, Phase %02x\n",
1959                 pSRB->TotalXferredLen, pSRB->SGToBeXferLen, pSRB->SRBState,
1960                 pSRB->ScsiPhase);
1961         printk ("DC390: AdpaterStatus: %02x, SRB Status %02x\n", pSRB->AdaptStatus, pSRB->SRBStatus);
1962     }
1963     printk ("DC390: Status of last IRQ (DMA/SC/Int/IRQ): %08x\n", dc390_laststatus);
1964     printk ("DC390: Register dump: SCSI block:\n");
1965     printk ("DC390: XferCnt  Cmd Stat IntS IRQS FFIS Ctl1 Ctl2 Ctl3 Ctl4\n");
1966     printk ("DC390:  %06x   %02x   %02x   %02x",
1967             DC390_read8(CtcReg_Low) + (DC390_read8(CtcReg_Mid) << 8) + (DC390_read8(CtcReg_High) << 16),
1968             DC390_read8(ScsiCmd), DC390_read8(Scsi_Status), DC390_read8(Intern_State));
1969     printk ("   %02x   %02x   %02x   %02x   %02x   %02x\n",
1970             DC390_read8(INT_Status), DC390_read8(Current_Fifo), DC390_read8(CtrlReg1),
1971             DC390_read8(CtrlReg2), DC390_read8(CtrlReg3), DC390_read8(CtrlReg4));
1972     DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
1973     if (DC390_read8(Current_Fifo) & 0x1f)
1974       {
1975         printk ("DC390: FIFO:");
1976         while (DC390_read8(Current_Fifo) & 0x1f) printk (" %02x", DC390_read8(ScsiFifo));
1977         printk ("\n");
1978       }
1979     printk ("DC390: Register dump: DMA engine:\n");
1980     printk ("DC390: Cmd   STrCnt    SBusA    WrkBC    WrkAC Stat SBusCtrl\n");
1981     printk ("DC390:  %02x %08x %08x %08x %08x   %02x %08x\n",
1982             DC390_read8(DMA_Cmd), DC390_read32(DMA_XferCnt), DC390_read32(DMA_XferAddr),
1983             DC390_read32(DMA_Wk_ByteCntr), DC390_read32(DMA_Wk_AddrCntr),
1984             DC390_read8(DMA_Status), DC390_read32(DMA_ScsiBusCtrl));
1985     DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
1986
1987     pdev = pACB->pdev;
1988     pci_read_config_word(pdev, PCI_STATUS, &pstat);
1989     printk ("DC390: Register dump: PCI Status: %04x\n", pstat);
1990     printk ("DC390: In case of driver trouble read Documentation/scsi/tmscsim.txt\n");
1991 }
1992
1993
1994 static int DC390_abort(struct scsi_cmnd *cmd)
1995 {
1996         struct dc390_acb *pACB = (struct dc390_acb*) cmd->device->host->hostdata;
1997         struct dc390_dcb *pDCB = (struct dc390_dcb*) cmd->device->hostdata;
1998
1999         scmd_printk(KERN_WARNING, cmd, "DC390: Abort command\n");
2000
2001         /* abort() is too stupid for already sent commands at the moment.
2002          * If it's called we are in trouble anyway, so let's dump some info
2003          * into the syslog at least. (KG, 98/08/20,99/06/20) */
2004         dc390_dumpinfo(pACB, pDCB, NULL);
2005
2006         pDCB->DCBFlag |= ABORT_DEV_;
2007         printk(KERN_INFO "DC390: Aborted.\n");
2008
2009         return FAILED;
2010 }
2011
2012
2013 static void dc390_ResetDevParam( struct dc390_acb* pACB )
2014 {
2015     struct dc390_dcb *pDCB, *pdcb;
2016
2017     pDCB = pACB->pLinkDCB;
2018     if (! pDCB) return;
2019     pdcb = pDCB;
2020     do
2021     {
2022         pDCB->SyncMode &= ~SYNC_NEGO_DONE;
2023         pDCB->SyncPeriod = 0;
2024         pDCB->SyncOffset = 0;
2025         pDCB->TagMask = 0;
2026         pDCB->CtrlR3 = FAST_CLK;
2027         pDCB->CtrlR4 &= NEGATE_REQACKDATA | CTRL4_RESERVED | NEGATE_REQACK;
2028         pDCB->CtrlR4 |= pACB->glitch_cfg;
2029         pDCB = pDCB->pNextDCB;
2030     }
2031     while( pdcb != pDCB );
2032     pACB->ACBFlag &= ~(RESET_DEV | RESET_DONE | RESET_DETECT);
2033
2034 }
2035
2036 static int DC390_bus_reset (struct scsi_cmnd *cmd)
2037 {
2038         struct dc390_acb*    pACB = (struct dc390_acb*) cmd->device->host->hostdata;
2039         u8   bval;
2040
2041         spin_lock_irq(cmd->device->host->host_lock);
2042
2043         bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2044         DC390_write8(CtrlReg1, bval);   /* disable IRQ on bus reset */
2045
2046         pACB->ACBFlag |= RESET_DEV;
2047         dc390_ResetSCSIBus(pACB);
2048
2049         dc390_ResetDevParam(pACB);
2050         mdelay(1);
2051         pACB->pScsiHost->last_reset = jiffies + 3*HZ/2
2052                 + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2053
2054         DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2055         DC390_read8(INT_Status);                /* Reset Pending INT */
2056
2057         dc390_DoingSRB_Done(pACB, cmd);
2058
2059         pACB->pActiveDCB = NULL;
2060         pACB->ACBFlag = 0;
2061
2062         bval = DC390_read8(CtrlReg1) & ~DIS_INT_ON_SCSI_RST;
2063         DC390_write8(CtrlReg1, bval);   /* re-enable interrupt */
2064
2065         spin_unlock_irq(cmd->device->host->host_lock);
2066
2067         return SUCCESS;
2068 }
2069
2070 /**
2071  * dc390_slave_alloc - Called by the scsi mid layer to tell us about a new
2072  * scsi device that we need to deal with.
2073  *
2074  * @scsi_device: The new scsi device that we need to handle.
2075  */
2076 static int dc390_slave_alloc(struct scsi_device *scsi_device)
2077 {
2078         struct dc390_acb *pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2079         struct dc390_dcb *pDCB, *pDCB2 = NULL;
2080         uint id = scsi_device->id;
2081         uint lun = scsi_device->lun;
2082
2083         pDCB = kzalloc(sizeof(struct dc390_dcb), GFP_KERNEL);
2084         if (!pDCB)
2085                 return -ENOMEM;
2086
2087         if (!pACB->DCBCnt++) {
2088                 pACB->pLinkDCB = pDCB;
2089                 pACB->pDCBRunRobin = pDCB;
2090         } else {
2091                 pACB->pLastDCB->pNextDCB = pDCB;
2092         }
2093
2094         pDCB->pNextDCB = pACB->pLinkDCB;
2095         pACB->pLastDCB = pDCB;
2096
2097         pDCB->pDCBACB = pACB;
2098         pDCB->TargetID = id;
2099         pDCB->TargetLUN = lun;
2100
2101         /*
2102          * Some values are for all LUNs: Copy them
2103          * In a clean way: We would have an own structure for a SCSI-ID
2104          */
2105         if (lun && (pDCB2 = dc390_findDCB(pACB, id, 0))) {
2106                 pDCB->DevMode = pDCB2->DevMode;
2107                 pDCB->SyncMode = pDCB2->SyncMode & SYNC_NEGO_DONE;
2108                 pDCB->SyncPeriod = pDCB2->SyncPeriod;
2109                 pDCB->SyncOffset = pDCB2->SyncOffset;
2110                 pDCB->NegoPeriod = pDCB2->NegoPeriod;
2111
2112                 pDCB->CtrlR3 = pDCB2->CtrlR3;
2113                 pDCB->CtrlR4 = pDCB2->CtrlR4;
2114         } else {
2115                 u8 index = pACB->AdapterIndex;
2116                 PEEprom prom = (PEEprom) &dc390_eepromBuf[index][id << 2];
2117
2118                 pDCB->DevMode = prom->EE_MODE1;
2119                 pDCB->NegoPeriod =
2120                         (dc390_clock_period1[prom->EE_SPEED] * 25) >> 2;
2121                 pDCB->CtrlR3 = FAST_CLK;
2122                 pDCB->CtrlR4 = pACB->glitch_cfg | CTRL4_RESERVED;
2123                 if (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION)
2124                         pDCB->CtrlR4 |= NEGATE_REQACKDATA | NEGATE_REQACK;
2125         }
2126
2127         if (pDCB->DevMode & SYNC_NEGO_)
2128                 pDCB->SyncMode |= SYNC_ENABLE;
2129         else {
2130                 pDCB->SyncMode = 0;
2131                 pDCB->SyncOffset &= ~0x0f;
2132         }
2133
2134         pDCB->CtrlR1 = pACB->pScsiHost->this_id;
2135         if (pDCB->DevMode & PARITY_CHK_)
2136                 pDCB->CtrlR1 |= PARITY_ERR_REPO;
2137
2138         pACB->scan_devices = 1;
2139         scsi_device->hostdata = pDCB;
2140         return 0;
2141 }
2142
2143 /**
2144  * dc390_slave_destroy - Called by the scsi mid layer to tell us about a
2145  * device that is going away.
2146  *
2147  * @scsi_device: The scsi device that we need to remove.
2148  */
2149 static void dc390_slave_destroy(struct scsi_device *scsi_device)
2150 {
2151         struct dc390_acb* pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2152         struct dc390_dcb* pDCB = (struct dc390_dcb*) scsi_device->hostdata;
2153         struct dc390_dcb* pPrevDCB = pACB->pLinkDCB;
2154
2155         pACB->scan_devices = 0;
2156
2157         BUG_ON(pDCB->GoingSRBCnt > 1);
2158
2159         if (pDCB == pACB->pLinkDCB) {
2160                 if (pACB->pLastDCB == pDCB) {
2161                         pDCB->pNextDCB = NULL;
2162                         pACB->pLastDCB = NULL;
2163                 }
2164                 pACB->pLinkDCB = pDCB->pNextDCB;
2165         } else {
2166                 while (pPrevDCB->pNextDCB != pDCB)
2167                         pPrevDCB = pPrevDCB->pNextDCB;
2168                 pPrevDCB->pNextDCB = pDCB->pNextDCB;
2169                 if (pDCB == pACB->pLastDCB)
2170                         pACB->pLastDCB = pPrevDCB;
2171         }
2172
2173         if (pDCB == pACB->pActiveDCB)
2174                 pACB->pActiveDCB = NULL;
2175         if (pDCB == pACB->pLinkDCB)
2176                 pACB->pLinkDCB = pDCB->pNextDCB;
2177         if (pDCB == pACB->pDCBRunRobin)
2178                 pACB->pDCBRunRobin = pDCB->pNextDCB;
2179         kfree(pDCB);
2180
2181         pACB->DCBCnt--;
2182 }
2183
2184 static int dc390_slave_configure(struct scsi_device *sdev)
2185 {
2186         struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
2187         struct dc390_dcb *dcb = (struct dc390_dcb *)sdev->hostdata;
2188
2189         acb->scan_devices = 0;
2190         if (sdev->tagged_supported && (dcb->DevMode & TAG_QUEUEING_)) {
2191                 dcb->SyncMode |= EN_TAG_QUEUEING;
2192                 scsi_activate_tcq(sdev, acb->TagMaxNum);
2193         }
2194
2195         return 0;
2196 }
2197
2198 static struct scsi_host_template driver_template = {
2199         .module                 = THIS_MODULE,
2200         .proc_name              = "tmscsim",
2201         .name                   = DC390_BANNER " V" DC390_VERSION,
2202         .slave_alloc            = dc390_slave_alloc,
2203         .slave_configure        = dc390_slave_configure,
2204         .slave_destroy          = dc390_slave_destroy,
2205         .queuecommand           = DC390_queuecommand,
2206         .eh_abort_handler       = DC390_abort,
2207         .eh_bus_reset_handler   = DC390_bus_reset,
2208         .can_queue              = 1,
2209         .this_id                = 7,
2210         .sg_tablesize           = SG_ALL,
2211         .cmd_per_lun            = 1,
2212         .use_clustering         = ENABLE_CLUSTERING,
2213         .max_sectors            = 0x4000, /* 8MiB = 16 * 1024 * 512 */
2214 };
2215
2216 /***********************************************************************
2217  * Functions for access to DC390 EEPROM
2218  * and some to emulate it
2219  *
2220  **********************************************************************/
2221
2222 static void __devinit dc390_eeprom_prepare_read(struct pci_dev *pdev, u8 cmd)
2223 {
2224         u8 carryFlag = 1, j = 0x80, bval;
2225         int i;
2226
2227         for (i = 0; i < 9; i++) {
2228                 if (carryFlag) {
2229                         pci_write_config_byte(pdev, 0x80, 0x40);
2230                         bval = 0xc0;
2231                 } else
2232                         bval = 0x80;
2233
2234                 udelay(160);
2235                 pci_write_config_byte(pdev, 0x80, bval);
2236                 udelay(160);
2237                 pci_write_config_byte(pdev, 0x80, 0);
2238                 udelay(160);
2239
2240                 carryFlag = (cmd & j) ? 1 : 0;
2241                 j >>= 1;
2242         }
2243 }
2244
2245 static u16 __devinit dc390_eeprom_get_data(struct pci_dev *pdev)
2246 {
2247         int i;
2248         u16 wval = 0;
2249         u8 bval;
2250
2251         for (i = 0; i < 16; i++) {
2252                 wval <<= 1;
2253
2254                 pci_write_config_byte(pdev, 0x80, 0x80);
2255                 udelay(160);
2256                 pci_write_config_byte(pdev, 0x80, 0x40);
2257                 udelay(160);
2258                 pci_read_config_byte(pdev, 0x00, &bval);
2259
2260                 if (bval == 0x22)
2261                         wval |= 1;
2262         }
2263
2264         return wval;
2265 }
2266
2267 static void __devinit dc390_read_eeprom(struct pci_dev *pdev, u16 *ptr)
2268 {
2269         u8 cmd = EEPROM_READ, i;
2270
2271         for (i = 0; i < 0x40; i++) {
2272                 pci_write_config_byte(pdev, 0xc0, 0);
2273                 udelay(160);
2274
2275                 dc390_eeprom_prepare_read(pdev, cmd++);
2276                 *ptr++ = dc390_eeprom_get_data(pdev);
2277
2278                 pci_write_config_byte(pdev, 0x80, 0);
2279                 pci_write_config_byte(pdev, 0x80, 0);
2280                 udelay(160);
2281         }
2282 }
2283
2284 /* Override EEprom values with explicitly set values */
2285 static void __devinit dc390_eeprom_override(u8 index)
2286 {
2287         u8 *ptr = (u8 *) dc390_eepromBuf[index], id;
2288
2289         /* Adapter Settings */
2290         if (tmscsim[0] != -2)
2291                 ptr[EE_ADAPT_SCSI_ID] = (u8)tmscsim[0]; /* Adapter ID */
2292         if (tmscsim[3] != -2)
2293                 ptr[EE_MODE2] = (u8)tmscsim[3];
2294         if (tmscsim[5] != -2)
2295                 ptr[EE_DELAY] = tmscsim[5];             /* Reset delay */
2296         if (tmscsim[4] != -2)
2297                 ptr[EE_TAG_CMD_NUM] = (u8)tmscsim[4];   /* Tagged Cmds */
2298
2299         /* Device Settings */
2300         for (id = 0; id < MAX_SCSI_ID; id++) {
2301                 if (tmscsim[2] != -2)
2302                         ptr[id << 2] = (u8)tmscsim[2];          /* EE_MODE1 */
2303                 if (tmscsim[1] != -2)
2304                         ptr[(id << 2) + 1] = (u8)tmscsim[1];    /* EE_Speed */
2305         }
2306 }
2307
2308 static int __devinitdata tmscsim_def[] = {
2309         7,
2310         0 /* 10MHz */,
2311         PARITY_CHK_ | SEND_START_ | EN_DISCONNECT_ | SYNC_NEGO_ | TAG_QUEUEING_,
2312         MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION | LUN_CHECK,
2313         3 /* 16 Tags per LUN */,
2314         1 /* s delay after Reset */,
2315 };
2316
2317 /* Copy defaults over set values where missing */
2318 static void __devinit dc390_fill_with_defaults (void)
2319 {
2320         int i;
2321
2322         for (i = 0; i < 6; i++) {
2323                 if (tmscsim[i] < 0 || tmscsim[i] > 255)
2324                         tmscsim[i] = tmscsim_def[i];
2325         }
2326
2327         /* Sanity checks */
2328         if (tmscsim[0] > 7)
2329                 tmscsim[0] = 7;
2330         if (tmscsim[1] > 7)
2331                 tmscsim[1] = 4;
2332         if (tmscsim[4] > 5)
2333                 tmscsim[4] = 4;
2334         if (tmscsim[5] > 180)
2335                 tmscsim[5] = 180;
2336 }
2337
2338 static void __devinit dc390_check_eeprom(struct pci_dev *pdev, u8 index)
2339 {
2340         u8 interpd[] = {1, 3, 5, 10, 16, 30, 60, 120};
2341         u8 EEbuf[128];
2342         u16 *ptr = (u16 *)EEbuf, wval = 0;
2343         int i;
2344
2345         dc390_read_eeprom(pdev, ptr);
2346         memcpy(dc390_eepromBuf[index], EEbuf, EE_ADAPT_SCSI_ID);
2347         memcpy(&dc390_eepromBuf[index][EE_ADAPT_SCSI_ID],
2348                &EEbuf[REAL_EE_ADAPT_SCSI_ID], EE_LEN - EE_ADAPT_SCSI_ID);
2349
2350         dc390_eepromBuf[index][EE_DELAY] = interpd[dc390_eepromBuf[index][EE_DELAY]];
2351
2352         for (i = 0; i < 0x40; i++, ptr++)
2353                 wval += *ptr;
2354
2355         /* no Tekram EEprom found */
2356         if (wval != 0x1234) {
2357                 int speed;
2358
2359                 printk(KERN_INFO "DC390_init: No EEPROM found! Trying default settings ...\n");
2360
2361                 /*
2362                  * XXX(hch): bogus, because we might have tekram and
2363                  *           non-tekram hbas in a single machine.
2364                  */
2365                 dc390_fill_with_defaults();
2366
2367                 speed = dc390_clock_speed[tmscsim[1]];
2368                 printk(KERN_INFO "DC390: Used defaults: AdaptID=%i, SpeedIdx=%i (%i.%i MHz), "
2369                        "DevMode=0x%02x, AdaptMode=0x%02x, TaggedCmnds=%i (%i), DelayReset=%is\n",
2370                        tmscsim[0], tmscsim[1], speed / 10, speed % 10,
2371                        (u8)tmscsim[2], (u8)tmscsim[3], tmscsim[4], 2 << (tmscsim[4]), tmscsim[5]);
2372         }
2373 }
2374
2375 static void __devinit dc390_init_hw(struct dc390_acb *pACB, u8 index)
2376 {
2377         struct Scsi_Host *shost = pACB->pScsiHost;
2378         u8 dstate;
2379
2380         /* Disable SCSI bus reset interrupt */
2381         DC390_write8(CtrlReg1, DIS_INT_ON_SCSI_RST | shost->this_id);
2382
2383         if (pACB->Gmode2 & RST_SCSI_BUS) {
2384                 dc390_ResetSCSIBus(pACB);
2385                 udelay(1000);
2386                 shost->last_reset = jiffies + HZ/2 +
2387                         HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2388         }
2389
2390         pACB->ACBFlag = 0;
2391
2392         /* Reset Pending INT */
2393         DC390_read8(INT_Status);
2394
2395         /* 250ms selection timeout */
2396         DC390_write8(Scsi_TimeOut, SEL_TIMEOUT);
2397
2398         /* Conversion factor = 0 , 40MHz clock */
2399         DC390_write8(Clk_Factor, CLK_FREQ_40MHZ);
2400
2401         /* NOP cmd - clear command register */
2402         DC390_write8(ScsiCmd, NOP_CMD);
2403
2404         /* Enable Feature and SCSI-2 */
2405         DC390_write8(CtrlReg2, EN_FEATURE+EN_SCSI2_CMD);
2406
2407         /* Fast clock */
2408         DC390_write8(CtrlReg3, FAST_CLK);
2409
2410         /* Negation */
2411         DC390_write8(CtrlReg4, pACB->glitch_cfg | /* glitch eater */
2412                 (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION) ?
2413                  NEGATE_REQACKDATA : 0);
2414
2415         /* Clear Transfer Count High: ID */
2416         DC390_write8(CtcReg_High, 0);
2417         DC390_write8(DMA_Cmd, DMA_IDLE_CMD);
2418         DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2419         DC390_write32(DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
2420
2421         dstate = DC390_read8(DMA_Status);
2422         DC390_write8(DMA_Status, dstate);
2423 }
2424
2425 static int __devinit dc390_probe_one(struct pci_dev *pdev,
2426                                     const struct pci_device_id *id)
2427 {
2428         struct dc390_acb *pACB;
2429         struct Scsi_Host *shost;
2430         unsigned long io_port;
2431         int error = -ENODEV, i;
2432
2433         if (pci_enable_device(pdev))
2434                 goto out;
2435
2436         pci_set_master(pdev);
2437
2438         error = -ENOMEM;
2439         if (disable_clustering)
2440                 driver_template.use_clustering = DISABLE_CLUSTERING;
2441         shost = scsi_host_alloc(&driver_template, sizeof(struct dc390_acb));
2442         if (!shost)
2443                 goto out_disable_device;
2444
2445         pACB = (struct dc390_acb *)shost->hostdata;
2446         memset(pACB, 0, sizeof(struct dc390_acb));
2447
2448         dc390_check_eeprom(pdev, dc390_adapterCnt);
2449         dc390_eeprom_override(dc390_adapterCnt);
2450
2451         io_port = pci_resource_start(pdev, 0);
2452
2453         shost->this_id = dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID];
2454         shost->io_port = io_port;
2455         shost->n_io_port = 0x80;
2456         shost->irq = pdev->irq;
2457         shost->base = io_port;
2458         shost->unique_id = io_port;
2459         shost->last_reset = jiffies;
2460
2461         pACB->pScsiHost = shost;
2462         pACB->IOPortBase = (u16) io_port;
2463         pACB->IRQLevel = pdev->irq;
2464
2465         shost->max_id = 8;
2466
2467         if (shost->max_id - 1 ==
2468             dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID])
2469                 shost->max_id--;
2470
2471         if (dc390_eepromBuf[dc390_adapterCnt][EE_MODE2] & LUN_CHECK)
2472                 shost->max_lun = 8;
2473         else
2474                 shost->max_lun = 1;
2475
2476         pACB->pFreeSRB = pACB->SRB_array;
2477         pACB->SRBCount = MAX_SRB_CNT;
2478         pACB->AdapterIndex = dc390_adapterCnt;
2479         pACB->TagMaxNum =
2480                 2 << dc390_eepromBuf[dc390_adapterCnt][EE_TAG_CMD_NUM];
2481         pACB->Gmode2 = dc390_eepromBuf[dc390_adapterCnt][EE_MODE2];
2482
2483         for (i = 0; i < pACB->SRBCount-1; i++)
2484                 pACB->SRB_array[i].pNextSRB = &pACB->SRB_array[i+1];
2485         pACB->SRB_array[pACB->SRBCount-1].pNextSRB = NULL;
2486         pACB->pTmpSRB = &pACB->TmpSRB;
2487
2488         pACB->sel_timeout = SEL_TIMEOUT;
2489         pACB->glitch_cfg = EATER_25NS;
2490         pACB->pdev = pdev;
2491
2492         if (!request_region(io_port, shost->n_io_port, "tmscsim")) {
2493                 printk(KERN_ERR "DC390: register IO ports error!\n");
2494                 goto out_host_put;
2495         }
2496
2497         /* Reset Pending INT */
2498         DC390_read8_(INT_Status, io_port);
2499
2500         if (request_irq(pdev->irq, do_DC390_Interrupt, IRQF_SHARED,
2501                                 "tmscsim", pACB)) {
2502                 printk(KERN_ERR "DC390: register IRQ error!\n");
2503                 goto out_release_region;
2504         }
2505
2506         dc390_init_hw(pACB, dc390_adapterCnt);
2507
2508         dc390_adapterCnt++;
2509
2510         pci_set_drvdata(pdev, shost);
2511
2512         error = scsi_add_host(shost, &pdev->dev);
2513         if (error)
2514                 goto out_free_irq;
2515         scsi_scan_host(shost);
2516         return 0;
2517
2518  out_free_irq:
2519         free_irq(pdev->irq, pACB);
2520  out_release_region:
2521         release_region(io_port, shost->n_io_port);
2522  out_host_put:
2523         scsi_host_put(shost);
2524  out_disable_device:
2525         pci_disable_device(pdev);
2526  out:
2527         return error;
2528 }
2529
2530 /**
2531  * dc390_remove_one - Called to remove a single instance of the adapter.
2532  *
2533  * @dev: The PCI device to remove.
2534  */
2535 static void __devexit dc390_remove_one(struct pci_dev *dev)
2536 {
2537         struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
2538         unsigned long iflags;
2539         struct dc390_acb* pACB = (struct dc390_acb*) scsi_host->hostdata;
2540         u8 bval;
2541
2542         scsi_remove_host(scsi_host);
2543
2544         spin_lock_irqsave(scsi_host->host_lock, iflags);
2545         pACB->ACBFlag = RESET_DEV;
2546         bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2547         DC390_write8 (CtrlReg1, bval);  /* disable interrupt */
2548         if (pACB->Gmode2 & RST_SCSI_BUS)
2549                 dc390_ResetSCSIBus(pACB);
2550         spin_unlock_irqrestore(scsi_host->host_lock, iflags);
2551
2552         free_irq(scsi_host->irq, pACB);
2553         release_region(scsi_host->io_port, scsi_host->n_io_port);
2554
2555         pci_disable_device(dev);
2556         scsi_host_put(scsi_host);
2557         pci_set_drvdata(dev, NULL);
2558 }
2559
2560 static struct pci_device_id tmscsim_pci_tbl[] = {
2561         { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD53C974,
2562                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
2563         { }
2564 };
2565 MODULE_DEVICE_TABLE(pci, tmscsim_pci_tbl);
2566
2567 static struct pci_driver dc390_driver = {
2568         .name           = "tmscsim",
2569         .id_table       = tmscsim_pci_tbl,
2570         .probe          = dc390_probe_one,
2571         .remove         = __devexit_p(dc390_remove_one),
2572 };
2573
2574 static int __init dc390_module_init(void)
2575 {
2576         if (!disable_clustering) {
2577                 printk(KERN_INFO "DC390: clustering now enabled by default. If you get problems load\n");
2578                 printk(KERN_INFO "       with \"disable_clustering=1\" and report to maintainers\n");
2579         }
2580
2581         if (tmscsim[0] == -1 || tmscsim[0] > 15) {
2582                 tmscsim[0] = 7;
2583                 tmscsim[1] = 4;
2584                 tmscsim[2] = PARITY_CHK_ | TAG_QUEUEING_;
2585                 tmscsim[3] = MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION;
2586                 tmscsim[4] = 2;
2587                 tmscsim[5] = 10;
2588                 printk (KERN_INFO "DC390: Using safe settings.\n");
2589         }
2590
2591         return pci_register_driver(&dc390_driver);
2592 }
2593
2594 static void __exit dc390_module_exit(void)
2595 {
2596         pci_unregister_driver(&dc390_driver);
2597 }
2598
2599 module_init(dc390_module_init);
2600 module_exit(dc390_module_exit);
2601
2602 #ifndef MODULE
2603 static int __init dc390_setup (char *str)
2604 {
2605         int ints[8],i, im;
2606
2607         get_options(str, ARRAY_SIZE(ints), ints);
2608         im = ints[0];
2609
2610         if (im > 6) {
2611                 printk (KERN_NOTICE "DC390: ignore extra params!\n");
2612                 im = 6;
2613         }
2614
2615         for (i = 0; i < im; i++)
2616                 tmscsim[i] = ints[i+1];
2617         /* dc390_checkparams (); */
2618         return 1;
2619 }
2620
2621 __setup("tmscsim=", dc390_setup);
2622 #endif