git.oblomov.eu Git - linux-2.6/blob - 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/config.h>
 222 #include <linux/module.h>
 223 #include <linux/delay.h>
 224 #include <linux/signal.h>
 225 #include <linux/sched.h>
 226 #include <linux/errno.h>
 227 #include <linux/kernel.h>
 228 #include <linux/ioport.h>
 229 #include <linux/pci.h>
 230 #include <linux/proc_fs.h>
 231 #include <linux/string.h>
 232 #include <linux/mm.h>
 233 #include <linux/blkdev.h>
 234 #include <linux/timer.h>
 235 #include <linux/interrupt.h>
 236 #include <linux/init.h>
 237 #include <linux/spinlock.h>
 238 #include <asm/io.h>
 239
 240 #include <scsi/scsi.h>
 241 #include <scsi/scsi_cmnd.h>
 242 #include <scsi/scsi_device.h>
 243 #include <scsi/scsi_host.h>
 244 #include <scsi/scsicam.h>
 245 #include <scsi/scsi_tcq.h>
 246
 247
 248 #define DC390_BANNER "Tekram DC390/AM53C974"
 249 #define DC390_VERSION "2.1d 2004-05-27"
 250
 251 #define PCI_DEVICE_ID_AMD53C974         PCI_DEVICE_ID_AMD_SCSI
 252
 253 #include "tmscsim.h"
 254
 255
 256 static void dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 257 static void dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 258 static void dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 259 static void dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 260 static void dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 261 static void dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 262 static void dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 263 static void dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 264 static void dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 265 static void dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 266 static void dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 267 static void dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 268 static void dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 269 static void dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus);
 270
 271 static void dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB );
 272 static void dc390_Disconnect( struct dc390_acb* pACB );
 273 static void dc390_Reselect( struct dc390_acb* pACB );
 274 static void dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB );
 275 static void dc390_ScsiRstDetect( struct dc390_acb* pACB );
 276 static void dc390_EnableMsgOut_Abort(struct dc390_acb*, struct dc390_srb*);
 277 static void dc390_dumpinfo(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB);
 278 static void dc390_ResetDevParam(struct dc390_acb* pACB);
 279
 280 static u32      dc390_laststatus = 0;
 281 static u8       dc390_adapterCnt = 0;
 282
 283 /* Startup values, to be overriden on the commandline */
 284 static int tmscsim[] = {-2, -2, -2, -2, -2, -2};
 285
 286 module_param_array(tmscsim, int, NULL, 0);
 287 MODULE_PARM_DESC(tmscsim, "Host SCSI ID, Speed (0=10MHz), Device Flags, Adapter Flags, Max Tags (log2(tags)-1), DelayReset (s)");
 288 MODULE_AUTHOR("C.L. Huang / Kurt Garloff");
 289 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram DC390 and other AMD53C974A based PCI SCSI adapters");
 290 MODULE_LICENSE("GPL");
 291 MODULE_SUPPORTED_DEVICE("sd,sr,sg,st");
 292
 293 static void *dc390_phase0[]={
 294        dc390_DataOut_0,
 295        dc390_DataIn_0,
 296        dc390_Command_0,
 297        dc390_Status_0,
 298        dc390_Nop_0,
 299        dc390_Nop_0,
 300        dc390_MsgOut_0,
 301        dc390_MsgIn_0,
 302        dc390_Nop_1
 303        };
 304
 305 static void *dc390_phase1[]={
 306        dc390_DataOutPhase,
 307        dc390_DataInPhase,
 308        dc390_CommandPhase,
 309        dc390_StatusPhase,
 310        dc390_Nop_0,
 311        dc390_Nop_0,
 312        dc390_MsgOutPhase,
 313        dc390_MsgInPhase,
 314        dc390_Nop_1
 315        };
 316
 317 #ifdef DC390_DEBUG1
 318 static char* dc390_p0_str[] = {
 319        "dc390_DataOut_0",
 320        "dc390_DataIn_0",
 321        "dc390_Command_0",
 322        "dc390_Status_0",
 323        "dc390_Nop_0",
 324        "dc390_Nop_0",
 325        "dc390_MsgOut_0",
 326        "dc390_MsgIn_0",
 327        "dc390_Nop_1"
 328        };
 329
 330 static char* dc390_p1_str[] = {
 331        "dc390_DataOutPhase",
 332        "dc390_DataInPhase",
 333        "dc390_CommandPhase",
 334        "dc390_StatusPhase",
 335        "dc390_Nop_0",
 336        "dc390_Nop_0",
 337        "dc390_MsgOutPhase",
 338        "dc390_MsgInPhase",
 339        "dc390_Nop_1"
 340        };
 341 #endif
 342
 343 static u8  dc390_eepromBuf[MAX_ADAPTER_NUM][EE_LEN];
 344 static u8  dc390_clock_period1[] = {4, 5, 6, 7, 8, 10, 13, 20};
 345 static u8  dc390_clock_speed[] = {100,80,67,57,50, 40, 31, 20};
 346
 347 /***********************************************************************
 348  * Functions for the management of the internal structures
 349  * (DCBs, SRBs, Queueing)
 350  *
 351  **********************************************************************/
 352 static struct dc390_dcb __inline__ *dc390_findDCB ( struct dc390_acb* pACB, u8 id, u8 lun)
 353 {
 354    struct dc390_dcb* pDCB = pACB->pLinkDCB; if (!pDCB) return NULL;
 355    while (pDCB->TargetID != id || pDCB->TargetLUN != lun)
 356      {
 357         pDCB = pDCB->pNextDCB;
 358         if (pDCB == pACB->pLinkDCB)
 359              return NULL;
 360      }
 361    DCBDEBUG1( printk (KERN_DEBUG "DCB %p (%02x,%02x) found.\n", \
 362                       pDCB, pDCB->TargetID, pDCB->TargetLUN));
 363    return pDCB;
 364 }
 365
 366 /* Insert SRB oin top of free list */
 367 static __inline__ void dc390_Free_insert (struct dc390_acb* pACB, struct dc390_srb* pSRB)
 368 {
 369     DEBUG0(printk ("DC390: Free SRB %p\n", pSRB));
 370     pSRB->pNextSRB = pACB->pFreeSRB;
 371     pACB->pFreeSRB = pSRB;
 372 }
 373
 374 static __inline__ void dc390_Going_append (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 375 {
 376     pDCB->GoingSRBCnt++;
 377     DEBUG0(printk("DC390: Append SRB %p to Going\n", pSRB));
 378     /* Append to the list of Going commands */
 379     if( pDCB->pGoingSRB )
 380         pDCB->pGoingLast->pNextSRB = pSRB;
 381     else
 382         pDCB->pGoingSRB = pSRB;
 383
 384     pDCB->pGoingLast = pSRB;
 385     /* No next one in sent list */
 386     pSRB->pNextSRB = NULL;
 387 }
 388
 389 static __inline__ void dc390_Going_remove (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 390 {
 391         DEBUG0(printk("DC390: Remove SRB %p from Going\n", pSRB));
 392    if (pSRB == pDCB->pGoingSRB)
 393         pDCB->pGoingSRB = pSRB->pNextSRB;
 394    else
 395      {
 396         struct dc390_srb* psrb = pDCB->pGoingSRB;
 397         while (psrb && psrb->pNextSRB != pSRB)
 398           psrb = psrb->pNextSRB;
 399         if (!psrb)
 400           { printk (KERN_ERR "DC390: Remove non-ex. SRB %p from Going!\n", pSRB); return; }
 401         psrb->pNextSRB = pSRB->pNextSRB;
 402         if (pSRB == pDCB->pGoingLast)
 403           pDCB->pGoingLast = psrb;
 404      }
 405    pDCB->GoingSRBCnt--;
 406 }
 407
 408 static struct scatterlist* dc390_sg_build_single(struct scatterlist *sg, void *addr, unsigned int length)
 409 {
 410         memset(sg, 0, sizeof(struct scatterlist));
 411         sg->page        = virt_to_page(addr);
 412         sg->length      = length;
 413         sg->offset      = (unsigned long)addr & ~PAGE_MASK;
 414         return sg;
 415 }
 416
 417 /* Create pci mapping */
 418 static int dc390_pci_map (struct dc390_srb* pSRB)
 419 {
 420         int error = 0;
 421         struct scsi_cmnd *pcmd = pSRB->pcmd;
 422         struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
 423         dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp));
 424
 425         /* Map sense buffer */
 426         if (pSRB->SRBFlag & AUTO_REQSENSE) {
 427                 pSRB->pSegmentList      = dc390_sg_build_single(&pSRB->Segmentx, pcmd->sense_buffer, sizeof(pcmd->sense_buffer));
 428                 pSRB->SGcount           = pci_map_sg(pdev, pSRB->pSegmentList, 1,
 429                                                      DMA_FROM_DEVICE);
 430                 cmdp->saved_dma_handle  = sg_dma_address(pSRB->pSegmentList);
 431
 432                 /* TODO: error handling */
 433                 if (pSRB->SGcount != 1)
 434                         error = 1;
 435                 DEBUG1(printk("%s(): Mapped sense buffer %p at %x\n", __FUNCTION__, pcmd->sense_buffer, cmdp->saved_dma_handle));
 436         /* Map SG list */
 437         } else if (pcmd->use_sg) {
 438                 pSRB->pSegmentList      = (struct scatterlist *) pcmd->request_buffer;
 439                 pSRB->SGcount           = pci_map_sg(pdev, pSRB->pSegmentList, pcmd->use_sg,
 440                                                      pcmd->sc_data_direction);
 441                 /* TODO: error handling */
 442                 if (!pSRB->SGcount)
 443                         error = 1;
 444                 DEBUG1(printk("%s(): Mapped SG %p with %d (%d) elements\n",\
 445                               __FUNCTION__, pcmd->request_buffer, pSRB->SGcount, pcmd->use_sg));
 446         /* Map single segment */
 447         } else if (pcmd->request_buffer && pcmd->request_bufflen) {
 448                 pSRB->pSegmentList      = dc390_sg_build_single(&pSRB->Segmentx, pcmd->request_buffer, pcmd->request_bufflen);
 449                 pSRB->SGcount           = pci_map_sg(pdev, pSRB->pSegmentList, 1,
 450                                                      pcmd->sc_data_direction);
 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 request buffer %p at %x\n", __FUNCTION__, pcmd->request_buffer, cmdp->saved_dma_handle));
 457         /* No mapping !? */
 458         } else
 459                 pSRB->SGcount = 0;
 460
 461         return error;
 462 }
 463
 464 /* Remove pci mapping */
 465 static void dc390_pci_unmap (struct dc390_srb* pSRB)
 466 {
 467         struct scsi_cmnd *pcmd = pSRB->pcmd;
 468         struct pci_dev *pdev = pSRB->pSRBDCB->pDCBACB->pdev;
 469         DEBUG1(dc390_cmd_scp_t* cmdp = ((dc390_cmd_scp_t*)(&pcmd->SCp)));
 470
 471         if (pSRB->SRBFlag) {
 472                 pci_unmap_sg(pdev, &pSRB->Segmentx, 1, DMA_FROM_DEVICE);
 473                 DEBUG1(printk("%s(): Unmapped sense buffer at %x\n", __FUNCTION__, cmdp->saved_dma_handle));
 474         } else if (pcmd->use_sg) {
 475                 pci_unmap_sg(pdev, pcmd->request_buffer, pcmd->use_sg, pcmd->sc_data_direction);
 476                 DEBUG1(printk("%s(): Unmapped SG at %p with %d elements\n", __FUNCTION__, pcmd->request_buffer, pcmd->use_sg));
 477         } else if (pcmd->request_buffer && pcmd->request_bufflen) {
 478                 pci_unmap_sg(pdev, &pSRB->Segmentx, 1, pcmd->sc_data_direction);
 479                 DEBUG1(printk("%s(): Unmapped request buffer at %x\n", __FUNCTION__, cmdp->saved_dma_handle));
 480         }
 481 }
 482
 483 static void __inline__
 484 dc390_freetag (struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
 485 {
 486         if (pSRB->TagNumber != SCSI_NO_TAG) {
 487                 pDCB->TagMask &= ~(1 << pSRB->TagNumber);   /* free tag mask */
 488                 pSRB->TagNumber = SCSI_NO_TAG;
 489         }
 490 }
 491
 492
 493 static int
 494 dc390_StartSCSI( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
 495 {
 496     struct scsi_cmnd *scmd = pSRB->pcmd;
 497     struct scsi_device *sdev = scmd->device;
 498     u8 cmd, disc_allowed, try_sync_nego;
 499     char tag[2];
 500
 501     pSRB->ScsiPhase = SCSI_NOP0;
 502
 503     if (pACB->Connected)
 504     {
 505         // Should not happen normally
 506         printk (KERN_WARNING "DC390: Can't select when connected! (%08x,%02x)\n",
 507                 pSRB->SRBState, pSRB->SRBFlag);
 508         pSRB->SRBState = SRB_READY;
 509         pACB->SelConn++;
 510         return 1;
 511     }
 512     if (time_before (jiffies, pACB->pScsiHost->last_reset))
 513     {
 514         DEBUG0(printk ("DC390: We were just reset and don't accept commands yet!\n"));
 515         return 1;
 516     }
 517     /* KG: Moved pci mapping here */
 518     dc390_pci_map(pSRB);
 519     /* TODO: error handling */
 520     DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
 521     DC390_write8 (Sync_Period, pDCB->SyncPeriod);
 522     DC390_write8 (Sync_Offset, pDCB->SyncOffset);
 523     DC390_write8 (CtrlReg1, pDCB->CtrlR1);
 524     DC390_write8 (CtrlReg3, pDCB->CtrlR3);
 525     DC390_write8 (CtrlReg4, pDCB->CtrlR4);
 526     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);             /* Flush FIFO */
 527     DEBUG1(printk (KERN_INFO "DC390: Start SCSI command: %02x (Sync:%02x)\n",\
 528             scmd->cmnd[0], pDCB->SyncMode));
 529
 530     /* Don't disconnect on AUTO_REQSENSE, cause it might be an
 531      * Contingent Allegiance Condition (6.6), where no tags should be used.
 532      * All other have to be allowed to disconnect to prevent Incorrect
 533      * Initiator Connection (6.8.2/6.5.2) */
 534     /* Changed KG, 99/06/06 */
 535     if (! (pSRB->SRBFlag & AUTO_REQSENSE))
 536         disc_allowed = pDCB->DevMode & EN_DISCONNECT_;
 537     else
 538         disc_allowed = 0;
 539
 540     if ((pDCB->SyncMode & SYNC_ENABLE) && pDCB->TargetLUN == 0 && sdev->sdtr &&
 541         (((scmd->cmnd[0] == REQUEST_SENSE || (pSRB->SRBFlag & AUTO_REQSENSE)) &&
 542           !(pDCB->SyncMode & SYNC_NEGO_DONE)) || scmd->cmnd[0] == INQUIRY))
 543       try_sync_nego = 1;
 544     else
 545       try_sync_nego = 0;
 546
 547     pSRB->MsgCnt = 0;
 548     cmd = SEL_W_ATN;
 549     DC390_write8 (ScsiFifo, IDENTIFY(disc_allowed, pDCB->TargetLUN));
 550     /* Change 99/05/31: Don't use tags when not disconnecting (BUSY) */
 551     if ((pDCB->SyncMode & EN_TAG_QUEUEING) && disc_allowed && scsi_populate_tag_msg(scmd, tag)) {
 552         DC390_write8(ScsiFifo, tag[0]);
 553         pDCB->TagMask |= 1 << tag[1];
 554         pSRB->TagNumber = tag[1];
 555         DC390_write8(ScsiFifo, tag[1]);
 556         DEBUG1(printk(KERN_INFO "DC390: Select w/DisCn for Cmd %li (SRB %p), block tag %02x\n", scmd->pid, pSRB, tag[1]));
 557         cmd = SEL_W_ATN3;
 558     } else {
 559         /* No TagQ */
 560 //no_tag:
 561         DEBUG1(printk(KERN_INFO "DC390: Select w%s/DisCn for Cmd %li (SRB %p), No TagQ\n", disc_allowed ? "" : "o", scmd->pid, pSRB));
 562     }
 563
 564     pSRB->SRBState = SRB_START_;
 565
 566     if (try_sync_nego)
 567       {
 568         u8 Sync_Off = pDCB->SyncOffset;
 569         DEBUG0(printk (KERN_INFO "DC390: NEW Sync Nego code triggered (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN));
 570         pSRB->MsgOutBuf[0] = EXTENDED_MESSAGE;
 571         pSRB->MsgOutBuf[1] = 3;
 572         pSRB->MsgOutBuf[2] = EXTENDED_SDTR;
 573         pSRB->MsgOutBuf[3] = pDCB->NegoPeriod;
 574         if (!(Sync_Off & 0x0f)) Sync_Off = SYNC_NEGO_OFFSET;
 575         pSRB->MsgOutBuf[4] = Sync_Off;
 576         pSRB->MsgCnt = 5;
 577         //pSRB->SRBState = SRB_MSGOUT_;
 578         pSRB->SRBState |= DO_SYNC_NEGO;
 579         cmd = SEL_W_ATN_STOP;
 580       }
 581
 582     /* Command is written in CommandPhase, if SEL_W_ATN_STOP ... */
 583     if (cmd != SEL_W_ATN_STOP)
 584       {
 585         if( pSRB->SRBFlag & AUTO_REQSENSE )
 586           {
 587             DC390_write8 (ScsiFifo, REQUEST_SENSE);
 588             DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
 589             DC390_write8 (ScsiFifo, 0);
 590             DC390_write8 (ScsiFifo, 0);
 591             DC390_write8 (ScsiFifo, sizeof(scmd->sense_buffer));
 592             DC390_write8 (ScsiFifo, 0);
 593             DEBUG1(printk (KERN_DEBUG "DC390: AutoReqSense !\n"));
 594           }
 595         else    /* write cmnd to bus */
 596           {
 597             u8 *ptr; u8 i;
 598             ptr = (u8 *)scmd->cmnd;
 599             for (i = 0; i < scmd->cmd_len; i++)
 600               DC390_write8 (ScsiFifo, *(ptr++));
 601           }
 602       }
 603     DEBUG0(if (pACB->pActiveDCB)        \
 604            printk (KERN_WARNING "DC390: ActiveDCB != 0\n"));
 605     DEBUG0(if (pDCB->pActiveSRB)        \
 606            printk (KERN_WARNING "DC390: ActiveSRB != 0\n"));
 607     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
 608     if (DC390_read8 (Scsi_Status) & INTERRUPT)
 609     {
 610         dc390_freetag (pDCB, pSRB);
 611         DEBUG0(printk ("DC390: Interrupt during Start SCSI (pid %li, target %02i-%02i)\n",
 612                 scmd->pid, scmd->device->id, scmd->device->lun));
 613         pSRB->SRBState = SRB_READY;
 614         //DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 615         pACB->SelLost++;
 616         return 1;
 617     }
 618     DC390_write8 (ScsiCmd, cmd);
 619     pACB->pActiveDCB = pDCB;
 620     pDCB->pActiveSRB = pSRB;
 621     pACB->Connected = 1;
 622     pSRB->ScsiPhase = SCSI_NOP1;
 623     return 0;
 624 }
 625
 626 //#define DMA_INT EN_DMA_INT /*| EN_PAGE_INT*/
 627 #define DMA_INT 0
 628
 629 #if DMA_INT
 630 /* This is similar to AM53C974.c ... */
 631 static u8
 632 dc390_dma_intr (struct dc390_acb* pACB)
 633 {
 634   struct dc390_srb* pSRB;
 635   u8 dstate;
 636   DEBUG0(u16 pstate; struct pci_dev *pdev = pACB->pdev);
 637
 638   DEBUG0(pci_read_config_word(pdev, PCI_STATUS, &pstate));
 639   DEBUG0(if (pstate & (PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY))\
 640         { printk(KERN_WARNING "DC390: PCI state = %04x!\n", pstate); \
 641           pci_write_config_word(pdev, PCI_STATUS, (PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY));});
 642
 643   dstate = DC390_read8 (DMA_Status);
 644
 645   if (! pACB->pActiveDCB || ! pACB->pActiveDCB->pActiveSRB) return dstate;
 646   else pSRB  = pACB->pActiveDCB->pActiveSRB;
 647
 648   if (dstate & (DMA_XFER_ABORT | DMA_XFER_ERROR | POWER_DOWN | PCI_MS_ABORT))
 649     {
 650         printk (KERN_ERR "DC390: DMA error (%02x)!\n", dstate);
 651         return dstate;
 652     }
 653   if (dstate & DMA_XFER_DONE)
 654     {
 655         u32 residual, xferCnt; int ctr = 6000000;
 656         if (! (DC390_read8 (DMA_Cmd) & READ_DIRECTION))
 657           {
 658             do
 659               {
 660                 DEBUG1(printk (KERN_DEBUG "DC390: read residual bytes ... \n"));
 661                 dstate = DC390_read8 (DMA_Status);
 662                 residual = DC390_read8 (CtcReg_Low) | DC390_read8 (CtcReg_Mid) << 8 |
 663                   DC390_read8 (CtcReg_High) << 16;
 664                 residual += DC390_read8 (Current_Fifo) & 0x1f;
 665               } while (residual && ! (dstate & SCSI_INTERRUPT) && --ctr);
 666             if (!ctr) printk (KERN_CRIT "DC390: dma_intr: DMA aborted unfinished: %06x bytes remain!!\n", DC390_read32 (DMA_Wk_ByteCntr));
 667             /* residual =  ... */
 668           }
 669         else
 670             residual = 0;
 671
 672         /* ??? */
 673
 674         xferCnt = pSRB->SGToBeXferLen - residual;
 675         pSRB->SGBusAddr += xferCnt;
 676         pSRB->TotalXferredLen += xferCnt;
 677         pSRB->SGToBeXferLen = residual;
 678 # ifdef DC390_DEBUG0
 679         printk (KERN_INFO "DC390: DMA: residual = %i, xfer = %i\n",
 680                 (unsigned int)residual, (unsigned int)xferCnt);
 681 # endif
 682
 683         DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
 684     }
 685   dc390_laststatus &= ~0xff000000; dc390_laststatus |= dstate << 24;
 686   return dstate;
 687 }
 688 #endif
 689
 690
 691 static void __inline__
 692 dc390_InvalidCmd(struct dc390_acb* pACB)
 693 {
 694         if (pACB->pActiveDCB->pActiveSRB->SRBState & (SRB_START_ | SRB_MSGOUT))
 695                 DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
 696 }
 697
 698
 699 static irqreturn_t __inline__
 700 DC390_Interrupt(int irq, void *dev_id, struct pt_regs *regs)
 701 {
 702     struct dc390_acb *pACB = (struct dc390_acb*)dev_id;
 703     struct dc390_dcb *pDCB;
 704     struct dc390_srb *pSRB;
 705     u8  sstatus=0;
 706     u8  phase;
 707     void   (*stateV)( struct dc390_acb*, struct dc390_srb*, u8 *);
 708     u8  istate, istatus;
 709 #if DMA_INT
 710     u8  dstatus;
 711 #endif
 712
 713     sstatus = DC390_read8 (Scsi_Status);
 714     if( !(sstatus & INTERRUPT) )
 715         return IRQ_NONE;
 716
 717     DEBUG1(printk (KERN_DEBUG "sstatus=%02x,", sstatus));
 718
 719 #if DMA_INT
 720     spin_lock_irq(pACB->pScsiHost->host_lock);
 721     dstatus = dc390_dma_intr (pACB);
 722     spin_unlock_irq(pACB->pScsiHost->host_lock);
 723
 724     DEBUG1(printk (KERN_DEBUG "dstatus=%02x,", dstatus));
 725     if (! (dstatus & SCSI_INTERRUPT))
 726       {
 727         DEBUG0(printk (KERN_WARNING "DC390 Int w/o SCSI actions (only DMA?)\n"));
 728         return IRQ_NONE;
 729       }
 730 #else
 731     //DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
 732     //dstatus = DC390_read8 (DMA_Status);
 733     //DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
 734 #endif
 735
 736     spin_lock_irq(pACB->pScsiHost->host_lock);
 737
 738     istate = DC390_read8 (Intern_State);
 739     istatus = DC390_read8 (INT_Status); /* This clears Scsi_Status, Intern_State and INT_Status ! */
 740
 741     DEBUG1(printk (KERN_INFO "Istatus(Res,Inv,Dis,Serv,Succ,ReS,SelA,Sel)=%02x,",istatus));
 742     dc390_laststatus &= ~0x00ffffff;
 743     dc390_laststatus |= /* dstatus<<24 | */ sstatus<<16 | istate<<8 | istatus;
 744
 745     if (sstatus & ILLEGAL_OP_ERR)
 746     {
 747         printk ("DC390: Illegal Operation detected (%08x)!\n", dc390_laststatus);
 748         dc390_dumpinfo (pACB, pACB->pActiveDCB, pACB->pActiveDCB->pActiveSRB);
 749     }
 750
 751     else if (istatus &  INVALID_CMD)
 752     {
 753         printk ("DC390: Invalid Command detected (%08x)!\n", dc390_laststatus);
 754         dc390_InvalidCmd( pACB );
 755         goto unlock;
 756     }
 757
 758     if (istatus &  SCSI_RESET)
 759     {
 760         dc390_ScsiRstDetect( pACB );
 761         goto unlock;
 762     }
 763
 764     if (istatus &  DISCONNECTED)
 765     {
 766         dc390_Disconnect( pACB );
 767         goto unlock;
 768     }
 769
 770     if (istatus &  RESELECTED)
 771     {
 772         dc390_Reselect( pACB );
 773         goto unlock;
 774     }
 775
 776     else if (istatus & (SELECTED | SEL_ATTENTION))
 777     {
 778         printk (KERN_ERR "DC390: Target mode not supported!\n");
 779         goto unlock;
 780     }
 781
 782     if (istatus & (SUCCESSFUL_OP|SERVICE_REQUEST) )
 783     {
 784         pDCB = pACB->pActiveDCB;
 785         if (!pDCB)
 786         {
 787                 printk (KERN_ERR "DC390: Suc. op/ Serv. req: pActiveDCB = 0!\n");
 788                 goto unlock;
 789         }
 790         pSRB = pDCB->pActiveSRB;
 791         if( pDCB->DCBFlag & ABORT_DEV_ )
 792           dc390_EnableMsgOut_Abort (pACB, pSRB);
 793
 794         phase = pSRB->ScsiPhase;
 795         DEBUG1(printk (KERN_INFO "DC390: [%i]%s(0) (%02x)\n", phase, dc390_p0_str[phase], sstatus));
 796         stateV = (void *) dc390_phase0[phase];
 797         ( *stateV )( pACB, pSRB, &sstatus );
 798
 799         pSRB->ScsiPhase = sstatus & 7;
 800         phase = (u8) sstatus & 7;
 801         DEBUG1(printk (KERN_INFO "DC390: [%i]%s(1) (%02x)\n", phase, dc390_p1_str[phase], sstatus));
 802         stateV = (void *) dc390_phase1[phase];
 803         ( *stateV )( pACB, pSRB, &sstatus );
 804     }
 805
 806  unlock:
 807     spin_unlock_irq(pACB->pScsiHost->host_lock);
 808     return IRQ_HANDLED;
 809 }
 810
 811 static irqreturn_t do_DC390_Interrupt( int irq, void *dev_id, struct pt_regs *regs)
 812 {
 813     irqreturn_t ret;
 814     DEBUG1(printk (KERN_INFO "DC390: Irq (%i) caught: ", irq));
 815     /* Locking is done in DC390_Interrupt */
 816     ret = DC390_Interrupt(irq, dev_id, regs);
 817     DEBUG1(printk (".. IRQ returned\n"));
 818     return ret;
 819 }
 820
 821 static void
 822 dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 823 {
 824     u8   sstatus;
 825     struct scatterlist *psgl;
 826     u32    ResidCnt, xferCnt;
 827     u8   dstate = 0;
 828
 829     sstatus = *psstatus;
 830
 831     if( !(pSRB->SRBState & SRB_XFERPAD) )
 832     {
 833         if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR) )
 834             pSRB->SRBStatus |= PARITY_ERROR;
 835
 836         if( sstatus & COUNT_2_ZERO )
 837         {
 838             unsigned long timeout = jiffies + HZ;
 839
 840             /* Function called from the ISR with the host_lock held and interrupts disabled */
 841             if (pSRB->SGToBeXferLen)
 842                 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
 843                     spin_unlock_irq(pACB->pScsiHost->host_lock);
 844                     udelay(50);
 845                     spin_lock_irq(pACB->pScsiHost->host_lock);
 846                 }
 847             if (!time_before(jiffies, timeout))
 848                 printk (KERN_CRIT "DC390: Deadlock in DataOut_0: DMA aborted unfinished: %06x bytes remain!!\n",
 849                         DC390_read32 (DMA_Wk_ByteCntr));
 850             dc390_laststatus &= ~0xff000000;
 851             dc390_laststatus |= dstate << 24;
 852             pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
 853             pSRB->SGIndex++;
 854             if( pSRB->SGIndex < pSRB->SGcount )
 855             {
 856                 pSRB->pSegmentList++;
 857                 psgl = pSRB->pSegmentList;
 858
 859                 pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
 860                 pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
 861             }
 862             else
 863                 pSRB->SGToBeXferLen = 0;
 864         }
 865         else
 866         {
 867             ResidCnt  = (u32) DC390_read8 (Current_Fifo) & 0x1f;
 868             ResidCnt |= (u32) DC390_read8 (CtcReg_High) << 16;
 869             ResidCnt |= (u32) DC390_read8 (CtcReg_Mid) << 8;
 870             ResidCnt += (u32) DC390_read8 (CtcReg_Low);
 871
 872             xferCnt = pSRB->SGToBeXferLen - ResidCnt;
 873             pSRB->SGBusAddr += xferCnt;
 874             pSRB->TotalXferredLen += xferCnt;
 875             pSRB->SGToBeXferLen = ResidCnt;
 876         }
 877     }
 878     if ((*psstatus & 7) != SCSI_DATA_OUT)
 879     {
 880             DC390_write8 (DMA_Cmd, WRITE_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */
 881             DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
 882     }
 883 }
 884
 885 static void
 886 dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
 887 {
 888     u8   sstatus, residual, bval;
 889     struct scatterlist *psgl;
 890     u32    ResidCnt, i;
 891     unsigned long   xferCnt;
 892     u8      *ptr;
 893
 894     sstatus = *psstatus;
 895
 896     if( !(pSRB->SRBState & SRB_XFERPAD) )
 897     {
 898         if( sstatus & (PARITY_ERR | ILLEGAL_OP_ERR))
 899             pSRB->SRBStatus |= PARITY_ERROR;
 900
 901         if( sstatus & COUNT_2_ZERO )
 902         {
 903             int dstate = 0;
 904             unsigned long timeout = jiffies + HZ;
 905
 906             /* Function called from the ISR with the host_lock held and interrupts disabled */
 907             if (pSRB->SGToBeXferLen)
 908                 while (time_before(jiffies, timeout) && !((dstate = DC390_read8 (DMA_Status)) & DMA_XFER_DONE)) {
 909                     spin_unlock_irq(pACB->pScsiHost->host_lock);
 910                     udelay(50);
 911                     spin_lock_irq(pACB->pScsiHost->host_lock);
 912                 }
 913             if (!time_before(jiffies, timeout)) {
 914                 printk (KERN_CRIT "DC390: Deadlock in DataIn_0: DMA aborted unfinished: %06x bytes remain!!\n",
 915                         DC390_read32 (DMA_Wk_ByteCntr));
 916                 printk (KERN_CRIT "DC390: DataIn_0: DMA State: %i\n", dstate);
 917             }
 918             dc390_laststatus &= ~0xff000000;
 919             dc390_laststatus |= dstate << 24;
 920             DEBUG1(ResidCnt = ((unsigned long) DC390_read8 (CtcReg_High) << 16) \
 921                 + ((unsigned long) DC390_read8 (CtcReg_Mid) << 8)               \
 922                 + ((unsigned long) DC390_read8 (CtcReg_Low)));
 923             DEBUG1(printk (KERN_DEBUG "Count_2_Zero (ResidCnt=%i,ToBeXfer=%li),", ResidCnt, pSRB->SGToBeXferLen));
 924
 925             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */
 926
 927             pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
 928             pSRB->SGIndex++;
 929             if( pSRB->SGIndex < pSRB->SGcount )
 930             {
 931                 pSRB->pSegmentList++;
 932                 psgl = pSRB->pSegmentList;
 933
 934                 pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
 935                 pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
 936             }
 937             else
 938                 pSRB->SGToBeXferLen = 0;
 939         }
 940         else    /* phase changed */
 941         {
 942             residual = 0;
 943             bval = DC390_read8 (Current_Fifo);
 944             while( bval & 0x1f )
 945             {
 946                 DEBUG1(printk (KERN_DEBUG "Check for residuals,"));
 947                 if( (bval & 0x1f) == 1 )
 948                 {
 949                     for(i=0; i < 0x100; i++)
 950                     {
 951                         bval = DC390_read8 (Current_Fifo);
 952                         if( !(bval & 0x1f) )
 953                             goto din_1;
 954                         else if( i == 0x0ff )
 955                         {
 956                             residual = 1;   /* ;1 residual byte */
 957                             goto din_1;
 958                         }
 959                     }
 960                 }
 961                 else
 962                     bval = DC390_read8 (Current_Fifo);
 963             }
 964 din_1:
 965             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_BLAST_CMD);
 966             for (i = 0xa000; i; i--)
 967             {
 968                 bval = DC390_read8 (DMA_Status);
 969                 if (bval & BLAST_COMPLETE)
 970                     break;
 971             }
 972             /* It seems a DMA Blast abort isn't that bad ... */
 973             if (!i) printk (KERN_ERR "DC390: DMA Blast aborted unfinished!\n");
 974             //DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */
 975             dc390_laststatus &= ~0xff000000; dc390_laststatus |= bval << 24;
 976
 977             DEBUG1(printk (KERN_DEBUG "Blast: Read %i times DMA_Status %02x", 0xa000-i, bval));
 978             ResidCnt = (u32) DC390_read8 (CtcReg_High);
 979             ResidCnt <<= 8;
 980             ResidCnt |= (u32) DC390_read8 (CtcReg_Mid);
 981             ResidCnt <<= 8;
 982             ResidCnt |= (u32) DC390_read8 (CtcReg_Low);
 983
 984             xferCnt = pSRB->SGToBeXferLen - ResidCnt;
 985             pSRB->SGBusAddr += xferCnt;
 986             pSRB->TotalXferredLen += xferCnt;
 987             pSRB->SGToBeXferLen = ResidCnt;
 988
 989             if( residual )
 990             {
 991                 static int feedback_requested;
 992                 bval = DC390_read8 (ScsiFifo);      /* get one residual byte */
 993
 994                 if (!feedback_requested) {
 995                         feedback_requested = 1;
 996                         printk(KERN_WARNING "%s: Please, contact <linux-scsi@vger.kernel.org> "
 997                                "to help improve support for your system.\n", __FILE__);
 998                 }
 999
1000                 ptr = (u8 *) bus_to_virt( pSRB->SGBusAddr );
1001                 *ptr = bval;
1002                 pSRB->SGBusAddr++; xferCnt++;
1003                 pSRB->TotalXferredLen++;
1004                 pSRB->SGToBeXferLen--;
1005             }
1006             DEBUG1(printk (KERN_DEBUG "Xfered: %li, Total: %li, Remaining: %li\n", xferCnt,\
1007                            pSRB->TotalXferredLen, pSRB->SGToBeXferLen));
1008
1009         }
1010     }
1011     if ((*psstatus & 7) != SCSI_DATA_IN)
1012     {
1013             DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1014             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD); /* | DMA_INT */
1015     }
1016 }
1017
1018 static void
1019 dc390_Command_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1020 {
1021 }
1022
1023 static void
1024 dc390_Status_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1025 {
1026
1027     pSRB->TargetStatus = DC390_read8 (ScsiFifo);
1028     //udelay (1);
1029     pSRB->EndMessage = DC390_read8 (ScsiFifo);  /* get message */
1030
1031     *psstatus = SCSI_NOP0;
1032     pSRB->SRBState = SRB_COMPLETED;
1033     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
1034 }
1035
1036 static void
1037 dc390_MsgOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1038 {
1039     if( pSRB->SRBState & (SRB_UNEXPECT_RESEL+SRB_ABORT_SENT) )
1040         *psstatus = SCSI_NOP0;
1041     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1042 }
1043
1044
1045 static void __inline__
1046 dc390_reprog (struct dc390_acb* pACB, struct dc390_dcb* pDCB)
1047 {
1048   DC390_write8 (Sync_Period, pDCB->SyncPeriod);
1049   DC390_write8 (Sync_Offset, pDCB->SyncOffset);
1050   DC390_write8 (CtrlReg3, pDCB->CtrlR3);
1051   DC390_write8 (CtrlReg4, pDCB->CtrlR4);
1052   dc390_SetXferRate (pACB, pDCB);
1053 }
1054
1055
1056 #ifdef DC390_DEBUG0
1057 static void
1058 dc390_printMsg (u8 *MsgBuf, u8 len)
1059 {
1060   int i;
1061   printk (" %02x", MsgBuf[0]);
1062   for (i = 1; i < len; i++)
1063     printk (" %02x", MsgBuf[i]);
1064   printk ("\n");
1065 }
1066 #endif
1067
1068 #define DC390_ENABLE_MSGOUT DC390_write8 (ScsiCmd, SET_ATN_CMD)
1069
1070 /* reject_msg */
1071 static void __inline__
1072 dc390_MsgIn_reject (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1073 {
1074   pSRB->MsgOutBuf[0] = MESSAGE_REJECT;
1075   pSRB->MsgCnt = 1;
1076   DC390_ENABLE_MSGOUT;
1077   DEBUG0 (printk (KERN_INFO "DC390: Reject message\n"));
1078 }
1079
1080 /* abort command */
1081 static void
1082 dc390_EnableMsgOut_Abort ( struct dc390_acb* pACB, struct dc390_srb* pSRB )
1083 {
1084     pSRB->MsgOutBuf[0] = ABORT;
1085     pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1086     pSRB->pSRBDCB->DCBFlag &= ~ABORT_DEV_;
1087 }
1088
1089 static struct dc390_srb*
1090 dc390_MsgIn_QTag (struct dc390_acb* pACB, struct dc390_dcb* pDCB, s8 tag)
1091 {
1092   struct dc390_srb* pSRB = pDCB->pGoingSRB;
1093
1094   if (pSRB)
1095     {
1096         struct scsi_cmnd *scmd = scsi_find_tag(pSRB->pcmd->device, tag);
1097         pSRB = (struct dc390_srb *)scmd->host_scribble;
1098
1099         if (pDCB->DCBFlag & ABORT_DEV_)
1100         {
1101           pSRB->SRBState = SRB_ABORT_SENT;
1102           dc390_EnableMsgOut_Abort( pACB, pSRB );
1103         }
1104
1105         if (!(pSRB->SRBState & SRB_DISCONNECT))
1106                 goto mingx0;
1107
1108         pDCB->pActiveSRB = pSRB;
1109         pSRB->SRBState = SRB_DATA_XFER;
1110     }
1111   else
1112     {
1113     mingx0:
1114       pSRB = pACB->pTmpSRB;
1115       pSRB->SRBState = SRB_UNEXPECT_RESEL;
1116       pDCB->pActiveSRB = pSRB;
1117       pSRB->MsgOutBuf[0] = ABORT_TAG;
1118       pSRB->MsgCnt = 1; DC390_ENABLE_MSGOUT;
1119     }
1120   return pSRB;
1121 }
1122
1123
1124 /* set async transfer mode */
1125 static void
1126 dc390_MsgIn_set_async (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1127 {
1128   struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1129   if (!(pSRB->SRBState & DO_SYNC_NEGO))
1130     printk (KERN_INFO "DC390: Target %i initiates Non-Sync?\n", pDCB->TargetID);
1131   pSRB->SRBState &= ~DO_SYNC_NEGO;
1132   pDCB->SyncMode &= ~(SYNC_ENABLE+SYNC_NEGO_DONE);
1133   pDCB->SyncPeriod = 0;
1134   pDCB->SyncOffset = 0;
1135   //pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1136   pDCB->CtrlR3 = FAST_CLK;      /* fast clock / normal scsi */
1137   pDCB->CtrlR4 &= 0x3f;
1138   pDCB->CtrlR4 |= pACB->glitch_cfg;     /* glitch eater */
1139   dc390_reprog (pACB, pDCB);
1140 }
1141
1142 /* set sync transfer mode */
1143 static void
1144 dc390_MsgIn_set_sync (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1145 {
1146   u8 bval;
1147   u16 wval, wval1;
1148   struct dc390_dcb* pDCB = pSRB->pSRBDCB;
1149   u8 oldsyncperiod = pDCB->SyncPeriod;
1150   u8 oldsyncoffset = pDCB->SyncOffset;
1151
1152   if (!(pSRB->SRBState & DO_SYNC_NEGO))
1153     {
1154       printk (KERN_INFO "DC390: Target %i initiates Sync: %ins %i ... answer ...\n",
1155               pDCB->TargetID, pSRB->MsgInBuf[3]<<2, pSRB->MsgInBuf[4]);
1156
1157       /* reject */
1158       //dc390_MsgIn_reject (pACB, pSRB);
1159       //return dc390_MsgIn_set_async (pACB, pSRB);
1160
1161       /* Reply with corrected SDTR Message */
1162       if (pSRB->MsgInBuf[4] > 15)
1163         {
1164           printk (KERN_INFO "DC390: Lower Sync Offset to 15\n");
1165           pSRB->MsgInBuf[4] = 15;
1166         }
1167       if (pSRB->MsgInBuf[3] < pDCB->NegoPeriod)
1168         {
1169           printk (KERN_INFO "DC390: Set sync nego period to %ins\n", pDCB->NegoPeriod << 2);
1170           pSRB->MsgInBuf[3] = pDCB->NegoPeriod;
1171         }
1172       memcpy (pSRB->MsgOutBuf, pSRB->MsgInBuf, 5);
1173       pSRB->MsgCnt = 5;
1174       DC390_ENABLE_MSGOUT;
1175     }
1176
1177   pSRB->SRBState &= ~DO_SYNC_NEGO;
1178   pDCB->SyncMode |= SYNC_ENABLE+SYNC_NEGO_DONE;
1179   pDCB->SyncOffset &= 0x0f0;
1180   pDCB->SyncOffset |= pSRB->MsgInBuf[4];
1181   pDCB->NegoPeriod = pSRB->MsgInBuf[3];
1182
1183   wval = (u16) pSRB->MsgInBuf[3];
1184   wval = wval << 2; wval -= 3; wval1 = wval / 25;       /* compute speed */
1185   if( (wval1 * 25) != wval) wval1++;
1186   bval = FAST_CLK+FAST_SCSI;    /* fast clock / fast scsi */
1187
1188   pDCB->CtrlR4 &= 0x3f;         /* Glitch eater: 12ns less than normal */
1189   if (pACB->glitch_cfg != NS_TO_GLITCH(0))
1190     pDCB->CtrlR4 |= NS_TO_GLITCH(((GLITCH_TO_NS(pACB->glitch_cfg)) - 1));
1191   else
1192     pDCB->CtrlR4 |= NS_TO_GLITCH(0);
1193   if (wval1 < 4) pDCB->CtrlR4 |= NS_TO_GLITCH(0); /* Ultra */
1194
1195   if (wval1 >= 8)
1196     {
1197       wval1--;  /* Timing computation differs by 1 from FAST_SCSI */
1198       bval = FAST_CLK;          /* fast clock / normal scsi */
1199       pDCB->CtrlR4 |= pACB->glitch_cfg;         /* glitch eater */
1200     }
1201
1202   pDCB->CtrlR3 = bval;
1203   pDCB->SyncPeriod = (u8)wval1;
1204
1205   if ((oldsyncperiod != wval1 || oldsyncoffset != pDCB->SyncOffset) && pDCB->TargetLUN == 0)
1206     {
1207       if (! (bval & FAST_SCSI)) wval1++;
1208       printk (KERN_INFO "DC390: Target %i: Sync transfer %i.%1i MHz, Offset %i\n", pDCB->TargetID,
1209               40/wval1, ((40%wval1)*10+wval1/2)/wval1, pDCB->SyncOffset & 0x0f);
1210     }
1211
1212   dc390_reprog (pACB, pDCB);
1213 }
1214
1215
1216 /* handle RESTORE_PTR */
1217 /* I presume, this command is already mapped, so, have to remap. */
1218 static void
1219 dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB)
1220 {
1221     struct scsi_cmnd *pcmd = pSRB->pcmd;
1222     struct scatterlist *psgl;
1223     pSRB->TotalXferredLen = 0;
1224     pSRB->SGIndex = 0;
1225     if (pcmd->use_sg) {
1226         pSRB->pSegmentList = (struct scatterlist *)pcmd->request_buffer;
1227         psgl = pSRB->pSegmentList;
1228         //dc390_pci_sync(pSRB);
1229
1230         while (pSRB->TotalXferredLen + (unsigned long) sg_dma_len(psgl) < pSRB->Saved_Ptr)
1231         {
1232             pSRB->TotalXferredLen += (unsigned long) sg_dma_len(psgl);
1233             pSRB->SGIndex++;
1234             if( pSRB->SGIndex < pSRB->SGcount )
1235             {
1236                 pSRB->pSegmentList++;
1237                 psgl = pSRB->pSegmentList;
1238                 pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
1239                 pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
1240             }
1241             else
1242                 pSRB->SGToBeXferLen = 0;
1243         }
1244         pSRB->SGToBeXferLen -= (pSRB->Saved_Ptr - pSRB->TotalXferredLen);
1245         pSRB->SGBusAddr += (pSRB->Saved_Ptr - pSRB->TotalXferredLen);
1246         printk (KERN_INFO "DC390: Pointer restored. Segment %i, Total %li, Bus %08lx\n",
1247                 pSRB->SGIndex, pSRB->Saved_Ptr, pSRB->SGBusAddr);
1248
1249     } else if(pcmd->request_buffer) {
1250         //dc390_pci_sync(pSRB);
1251
1252         sg_dma_len(&pSRB->Segmentx) = pcmd->request_bufflen - pSRB->Saved_Ptr;
1253         pSRB->SGcount = 1;
1254         pSRB->pSegmentList = (struct scatterlist *) &pSRB->Segmentx;
1255     } else {
1256          pSRB->SGcount = 0;
1257          printk (KERN_INFO "DC390: RESTORE_PTR message for Transfer without Scatter-Gather ??\n");
1258     }
1259
1260   pSRB->TotalXferredLen = pSRB->Saved_Ptr;
1261 }
1262
1263
1264 /* According to the docs, the AM53C974 reads the message and
1265  * generates a Successful Operation IRQ before asserting ACK for
1266  * the last byte (how does it know whether it's the last ?) */
1267 /* The old code handled it in another way, indicating, that on
1268  * every message byte an IRQ is generated and every byte has to
1269  * be manually ACKed. Hmmm ?  (KG, 98/11/28) */
1270 /* The old implementation was correct. Sigh! */
1271
1272 /* Check if the message is complete */
1273 static u8 __inline__
1274 dc390_MsgIn_complete (u8 *msgbuf, u32 len)
1275 {
1276   if (*msgbuf == EXTENDED_MESSAGE)
1277   {
1278         if (len < 2) return 0;
1279         if (len < msgbuf[1] + 2) return 0;
1280   }
1281   else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) // two byte messages
1282         if (len < 2) return 0;
1283   return 1;
1284 }
1285
1286
1287
1288 /* read and eval received messages */
1289 static void
1290 dc390_MsgIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1291 {
1292     struct dc390_dcb*   pDCB = pACB->pActiveDCB;
1293
1294     /* Read the msg */
1295
1296     pSRB->MsgInBuf[pACB->MsgLen++] = DC390_read8 (ScsiFifo);
1297     //pSRB->SRBState = 0;
1298
1299     /* Msg complete ? */
1300     if (dc390_MsgIn_complete (pSRB->MsgInBuf, pACB->MsgLen))
1301       {
1302         DEBUG0 (printk (KERN_INFO "DC390: MsgIn:"); dc390_printMsg (pSRB->MsgInBuf, pACB->MsgLen));
1303         /* Now eval the msg */
1304         switch (pSRB->MsgInBuf[0])
1305           {
1306           case DISCONNECT:
1307             pSRB->SRBState = SRB_DISCONNECT; break;
1308
1309           case SIMPLE_QUEUE_TAG:
1310           case HEAD_OF_QUEUE_TAG:
1311           case ORDERED_QUEUE_TAG:
1312             pSRB = dc390_MsgIn_QTag (pACB, pDCB, pSRB->MsgInBuf[1]);
1313             break;
1314
1315           case MESSAGE_REJECT:
1316             DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1317             pDCB->NegoPeriod = 50; /* 200ns <=> 5 MHz */
1318             if( pSRB->SRBState & DO_SYNC_NEGO)
1319               dc390_MsgIn_set_async (pACB, pSRB);
1320             break;
1321
1322           case EXTENDED_MESSAGE:
1323             /* reject every extended msg but SDTR */
1324             if (pSRB->MsgInBuf[1] != 3 || pSRB->MsgInBuf[2] != EXTENDED_SDTR)
1325               dc390_MsgIn_reject (pACB, pSRB);
1326             else
1327               {
1328                 if (pSRB->MsgInBuf[3] == 0 || pSRB->MsgInBuf[4] == 0)
1329                   dc390_MsgIn_set_async (pACB, pSRB);
1330                 else
1331                   dc390_MsgIn_set_sync (pACB, pSRB);
1332               }
1333
1334             // nothing has to be done
1335           case COMMAND_COMPLETE: break;
1336
1337             // SAVE POINTER may be ignored as we have the struct dc390_srb* associated with the
1338             // scsi command. Thanks, Gerard, for pointing it out.
1339           case SAVE_POINTERS:
1340             pSRB->Saved_Ptr = pSRB->TotalXferredLen;
1341             break;
1342             // The device might want to restart transfer with a RESTORE
1343           case RESTORE_POINTERS:
1344             DEBUG0(printk ("DC390: RESTORE POINTER message received ... try to handle\n"));
1345             dc390_restore_ptr (pACB, pSRB);
1346             break;
1347
1348             // reject unknown messages
1349           default: dc390_MsgIn_reject (pACB, pSRB);
1350           }
1351
1352         /* Clear counter and MsgIn state */
1353         pSRB->SRBState &= ~SRB_MSGIN;
1354         pACB->MsgLen = 0;
1355       }
1356
1357     *psstatus = SCSI_NOP0;
1358     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);
1359     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1360 }
1361
1362
1363 static void
1364 dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
1365 {
1366     struct scatterlist *psgl;
1367     unsigned long  lval;
1368     struct dc390_dcb*   pDCB = pACB->pActiveDCB;
1369
1370     if (pSRB == pACB->pTmpSRB)
1371     {
1372         if (pDCB)
1373                 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (%02i-%i)\n", pDCB->TargetID, pDCB->TargetLUN);
1374         else
1375                 printk(KERN_ERR "DC390: pSRB == pTmpSRB! (TagQ Error?) (DCB 0!)\n");
1376
1377         /* Try to recover - some broken disks react badly to tagged INQUIRY */
1378         if (pDCB && pACB->scan_devices && pDCB->GoingSRBCnt == 1) {
1379                 pSRB = pDCB->pGoingSRB;
1380                 pDCB->pActiveSRB = pSRB;
1381         } else {
1382                 pSRB->pSRBDCB = pDCB;
1383                 dc390_EnableMsgOut_Abort(pACB, pSRB);
1384                 if (pDCB)
1385                         pDCB->DCBFlag |= ABORT_DEV;
1386                 return;
1387         }
1388     }
1389
1390     if( pSRB->SGIndex < pSRB->SGcount )
1391     {
1392         DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir /* | DMA_INT */);
1393         if( !pSRB->SGToBeXferLen )
1394         {
1395             psgl = pSRB->pSegmentList;
1396             pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
1397             pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
1398             DEBUG1(printk (KERN_DEBUG " DC390: Next SG segment."));
1399         }
1400         lval = pSRB->SGToBeXferLen;
1401         DEBUG1(printk (KERN_DEBUG " DC390: Start transfer: %li bytes (address %08lx)\n", lval, pSRB->SGBusAddr));
1402         DC390_write8 (CtcReg_Low, (u8) lval);
1403         lval >>= 8;
1404         DC390_write8 (CtcReg_Mid, (u8) lval);
1405         lval >>= 8;
1406         DC390_write8 (CtcReg_High, (u8) lval);
1407
1408         DC390_write32 (DMA_XferCnt, pSRB->SGToBeXferLen);
1409         DC390_write32 (DMA_XferAddr, pSRB->SGBusAddr);
1410
1411         //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir); /* | DMA_INT; */
1412         pSRB->SRBState = SRB_DATA_XFER;
1413
1414         DC390_write8 (ScsiCmd, DMA_COMMAND+INFO_XFER_CMD);
1415
1416         DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir | DMA_INT);
1417         //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT));
1418         //DEBUG1(printk (KERN_DEBUG "DC390: DMA_Status: %02x\n", DC390_read8 (DMA_Status)));
1419         //DEBUG1(DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT));
1420     }
1421     else    /* xfer pad */
1422     {
1423         if( pSRB->SGcount )
1424         {
1425             pSRB->AdaptStatus = H_OVER_UNDER_RUN;
1426             pSRB->SRBStatus |= OVER_RUN;
1427             DEBUG0(printk (KERN_WARNING " DC390: Overrun -"));
1428         }
1429         DEBUG0(printk (KERN_WARNING " Clear transfer pad \n"));
1430         DC390_write8 (CtcReg_Low, 0);
1431         DC390_write8 (CtcReg_Mid, 0);
1432         DC390_write8 (CtcReg_High, 0);
1433
1434         pSRB->SRBState |= SRB_XFERPAD;
1435         DC390_write8 (ScsiCmd, DMA_COMMAND+XFER_PAD_BYTE);
1436 /*
1437         DC390_write8 (DMA_Cmd, DMA_IDLE_CMD | ioDir); // | DMA_INT;
1438         DC390_write8 (DMA_Cmd, DMA_START_CMD | ioDir | DMA_INT);
1439 */
1440     }
1441 }
1442
1443
1444 static void
1445 dc390_DataOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1446 {
1447     dc390_DataIO_Comm (pACB, pSRB, WRITE_DIRECTION);
1448 }
1449
1450 static void
1451 dc390_DataInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1452 {
1453     dc390_DataIO_Comm (pACB, pSRB, READ_DIRECTION);
1454 }
1455
1456 static void
1457 dc390_CommandPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1458 {
1459     struct dc390_dcb*   pDCB;
1460     u8  i, cnt;
1461     u8     *ptr;
1462
1463     DC390_write8 (ScsiCmd, RESET_ATN_CMD);
1464     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1465     if( !(pSRB->SRBFlag & AUTO_REQSENSE) )
1466     {
1467         cnt = (u8) pSRB->pcmd->cmd_len;
1468         ptr = (u8 *) pSRB->pcmd->cmnd;
1469         for(i=0; i < cnt; i++)
1470             DC390_write8 (ScsiFifo, *(ptr++));
1471     }
1472     else
1473     {
1474         DC390_write8 (ScsiFifo, REQUEST_SENSE);
1475         pDCB = pACB->pActiveDCB;
1476         DC390_write8 (ScsiFifo, pDCB->TargetLUN << 5);
1477         DC390_write8 (ScsiFifo, 0);
1478         DC390_write8 (ScsiFifo, 0);
1479         DC390_write8 (ScsiFifo, sizeof(pSRB->pcmd->sense_buffer));
1480         DC390_write8 (ScsiFifo, 0);
1481         DEBUG0(printk(KERN_DEBUG "DC390: AutoReqSense (CmndPhase)!\n"));
1482     }
1483     pSRB->SRBState = SRB_COMMAND;
1484     DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1485 }
1486
1487 static void
1488 dc390_StatusPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1489 {
1490     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1491     pSRB->SRBState = SRB_STATUS;
1492     DC390_write8 (ScsiCmd, INITIATOR_CMD_CMPLTE);
1493     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1494 }
1495
1496 static void
1497 dc390_MsgOutPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1498 {
1499     u8   bval, i, cnt;
1500     u8     *ptr;
1501     struct dc390_dcb*    pDCB;
1502
1503     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1504     pDCB = pACB->pActiveDCB;
1505     if( !(pSRB->SRBState & SRB_MSGOUT) )
1506     {
1507         cnt = pSRB->MsgCnt;
1508         if( cnt )
1509         {
1510             ptr = (u8 *) pSRB->MsgOutBuf;
1511             for(i=0; i < cnt; i++)
1512                 DC390_write8 (ScsiFifo, *(ptr++));
1513             pSRB->MsgCnt = 0;
1514             if( (pDCB->DCBFlag & ABORT_DEV_) &&
1515                 (pSRB->MsgOutBuf[0] == ABORT) )
1516                 pSRB->SRBState = SRB_ABORT_SENT;
1517         }
1518         else
1519         {
1520             bval = ABORT;       /* ??? MSG_NOP */
1521             if( (pSRB->pcmd->cmnd[0] == INQUIRY ) ||
1522                 (pSRB->pcmd->cmnd[0] == REQUEST_SENSE) ||
1523                 (pSRB->SRBFlag & AUTO_REQSENSE) )
1524             {
1525                 if( pDCB->SyncMode & SYNC_ENABLE )
1526                     goto  mop1;
1527             }
1528             DC390_write8 (ScsiFifo, bval);
1529         }
1530         DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1531     }
1532     else
1533     {
1534 mop1:
1535         printk (KERN_ERR "DC390: OLD Sync Nego code triggered! (%i %i)\n", pDCB->TargetID, pDCB->TargetLUN);
1536         DC390_write8 (ScsiFifo, EXTENDED_MESSAGE);
1537         DC390_write8 (ScsiFifo, 3);     /*    ;length of extended msg */
1538         DC390_write8 (ScsiFifo, EXTENDED_SDTR); /*    ; sync nego */
1539         DC390_write8 (ScsiFifo, pDCB->NegoPeriod);
1540         if (pDCB->SyncOffset & 0x0f)
1541                     DC390_write8 (ScsiFifo, pDCB->SyncOffset);
1542         else
1543                     DC390_write8 (ScsiFifo, SYNC_NEGO_OFFSET);
1544         pSRB->SRBState |= DO_SYNC_NEGO;
1545         DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1546     }
1547 }
1548
1549 static void
1550 dc390_MsgInPhase( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1551 {
1552     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1553     if( !(pSRB->SRBState & SRB_MSGIN) )
1554     {
1555         pSRB->SRBState &= ~SRB_DISCONNECT;
1556         pSRB->SRBState |= SRB_MSGIN;
1557     }
1558     DC390_write8 (ScsiCmd, INFO_XFER_CMD);
1559     //DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1560 }
1561
1562 static void
1563 dc390_Nop_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1564 {
1565 }
1566
1567 static void
1568 dc390_Nop_1( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
1569 {
1570 }
1571
1572
1573 static void
1574 dc390_SetXferRate( struct dc390_acb* pACB, struct dc390_dcb* pDCB )
1575 {
1576     u8  bval, i, cnt;
1577     struct dc390_dcb*   ptr;
1578
1579     if( !(pDCB->TargetLUN) )
1580     {
1581         if( !pACB->scan_devices )
1582         {
1583             ptr = pACB->pLinkDCB;
1584             cnt = pACB->DCBCnt;
1585             bval = pDCB->TargetID;
1586             for(i=0; i<cnt; i++)
1587             {
1588                 if( ptr->TargetID == bval )
1589                 {
1590                     ptr->SyncPeriod = pDCB->SyncPeriod;
1591                     ptr->SyncOffset = pDCB->SyncOffset;
1592                     ptr->CtrlR3 = pDCB->CtrlR3;
1593                     ptr->CtrlR4 = pDCB->CtrlR4;
1594                     ptr->SyncMode = pDCB->SyncMode;
1595                 }
1596                 ptr = ptr->pNextDCB;
1597             }
1598         }
1599     }
1600     return;
1601 }
1602
1603
1604 static void
1605 dc390_Disconnect( struct dc390_acb* pACB )
1606 {
1607     struct dc390_dcb *pDCB;
1608     struct dc390_srb *pSRB, *psrb;
1609     u8  i, cnt;
1610
1611     DEBUG0(printk(KERN_INFO "DISC,"));
1612
1613     if (!pACB->Connected) printk(KERN_ERR "DC390: Disconnect not-connected bus?\n");
1614     pACB->Connected = 0;
1615     pDCB = pACB->pActiveDCB;
1616     if (!pDCB)
1617      {
1618         DEBUG0(printk(KERN_ERR "ACB:%p->ActiveDCB:%p IOPort:%04x IRQ:%02x !\n",\
1619                pACB, pDCB, pACB->IOPortBase, pACB->IRQLevel));
1620         mdelay(400);
1621         DC390_read8 (INT_Status);       /* Reset Pending INT */
1622         DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1623         return;
1624      }
1625     DC390_write8 (ScsiCmd, EN_SEL_RESEL);
1626     pSRB = pDCB->pActiveSRB;
1627     pACB->pActiveDCB = NULL;
1628     pSRB->ScsiPhase = SCSI_NOP0;
1629     if( pSRB->SRBState & SRB_UNEXPECT_RESEL )
1630         pSRB->SRBState = 0;
1631     else if( pSRB->SRBState & SRB_ABORT_SENT )
1632     {
1633         pDCB->TagMask = 0;
1634         pDCB->DCBFlag = 0;
1635         cnt = pDCB->GoingSRBCnt;
1636         pDCB->GoingSRBCnt = 0;
1637         pSRB = pDCB->pGoingSRB;
1638         for( i=0; i < cnt; i++)
1639         {
1640             psrb = pSRB->pNextSRB;
1641             dc390_Free_insert (pACB, pSRB);
1642             pSRB = psrb;
1643         }
1644         pDCB->pGoingSRB = NULL;
1645     }
1646     else
1647     {
1648         if( (pSRB->SRBState & (SRB_START_+SRB_MSGOUT)) ||
1649            !(pSRB->SRBState & (SRB_DISCONNECT+SRB_COMPLETED)) )
1650         {       /* Selection time out */
1651                 pSRB->TargetStatus = SCSI_STAT_SEL_TIMEOUT;
1652                 goto  disc1;
1653         }
1654         else if (!(pSRB->SRBState & SRB_DISCONNECT) && (pSRB->SRBState & SRB_COMPLETED))
1655         {
1656 disc1:
1657             dc390_freetag (pDCB, pSRB);
1658             pDCB->pActiveSRB = NULL;
1659             pSRB->SRBState = SRB_FREE;
1660             dc390_SRBdone( pACB, pDCB, pSRB);
1661         }
1662     }
1663     pACB->MsgLen = 0;
1664 }
1665
1666
1667 static void
1668 dc390_Reselect( struct dc390_acb* pACB )
1669 {
1670     struct dc390_dcb*   pDCB;
1671     struct dc390_srb*   pSRB;
1672     u8  id, lun;
1673
1674     DEBUG0(printk(KERN_INFO "RSEL,"));
1675     pACB->Connected = 1;
1676     pDCB = pACB->pActiveDCB;
1677     if( pDCB )
1678     {   /* Arbitration lost but Reselection won */
1679         DEBUG0(printk ("DC390: (ActiveDCB != 0: Arb. lost but resel. won)!\n"));
1680         pSRB = pDCB->pActiveSRB;
1681         if( !( pACB->scan_devices ) )
1682         {
1683             struct scsi_cmnd *pcmd = pSRB->pcmd;
1684             pcmd->resid = pcmd->request_bufflen;
1685             SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1686             dc390_Going_remove(pDCB, pSRB);
1687             dc390_Free_insert(pACB, pSRB);
1688             pcmd->scsi_done (pcmd);
1689             DEBUG0(printk(KERN_DEBUG"DC390: Return SRB %p to free\n", pSRB));
1690         }
1691     }
1692     /* Get ID */
1693     lun = DC390_read8 (ScsiFifo);
1694     DEBUG0(printk ("Dev %02x,", lun));
1695     if (!(lun & (1 << pACB->pScsiHost->this_id)))
1696       printk (KERN_ERR "DC390: Reselection must select host adapter: %02x!\n", lun);
1697     else
1698       lun ^= 1 << pACB->pScsiHost->this_id; /* Mask AdapterID */
1699     id = 0; while (lun >>= 1) id++;
1700     /* Get LUN */
1701     lun = DC390_read8 (ScsiFifo);
1702     if (!(lun & IDENTIFY_BASE)) printk (KERN_ERR "DC390: Resel: Expect identify message!\n");
1703     lun &= 7;
1704     DEBUG0(printk ("(%02i-%i),", id, lun));
1705     pDCB = dc390_findDCB (pACB, id, lun);
1706     if (!pDCB)
1707     {
1708         printk (KERN_ERR "DC390: Reselect from non existing device (%02i-%i)\n",
1709                     id, lun);
1710         return;
1711     }
1712     pACB->pActiveDCB = pDCB;
1713     /* TagQ: We expect a message soon, so never mind the exact SRB */
1714     if( pDCB->SyncMode & EN_TAG_QUEUEING )
1715     {
1716         pSRB = pACB->pTmpSRB;
1717         pDCB->pActiveSRB = pSRB;
1718     }
1719     else
1720     {
1721         pSRB = pDCB->pActiveSRB;
1722         if( !pSRB || !(pSRB->SRBState & SRB_DISCONNECT) )
1723         {
1724             pSRB= pACB->pTmpSRB;
1725             pSRB->SRBState = SRB_UNEXPECT_RESEL;
1726             printk (KERN_ERR "DC390: Reselect without outstanding cmnd (%02i-%i)\n",
1727                     id, lun);
1728             pDCB->pActiveSRB = pSRB;
1729             dc390_EnableMsgOut_Abort ( pACB, pSRB );
1730         }
1731         else
1732         {
1733             if( pDCB->DCBFlag & ABORT_DEV_ )
1734             {
1735                 pSRB->SRBState = SRB_ABORT_SENT;
1736                 printk (KERN_INFO "DC390: Reselect: Abort (%02i-%i)\n",
1737                         id, lun);
1738                 dc390_EnableMsgOut_Abort( pACB, pSRB );
1739             }
1740             else
1741                 pSRB->SRBState = SRB_DATA_XFER;
1742         }
1743     }
1744
1745     DEBUG1(printk (KERN_DEBUG "Resel SRB(%p): TagNum (%02x)\n", pSRB, pSRB->TagNumber));
1746     pSRB->ScsiPhase = SCSI_NOP0;
1747     DC390_write8 (Scsi_Dest_ID, pDCB->TargetID);
1748     DC390_write8 (Sync_Period, pDCB->SyncPeriod);
1749     DC390_write8 (Sync_Offset, pDCB->SyncOffset);
1750     DC390_write8 (CtrlReg1, pDCB->CtrlR1);
1751     DC390_write8 (CtrlReg3, pDCB->CtrlR3);
1752     DC390_write8 (CtrlReg4, pDCB->CtrlR4);      /* ; Glitch eater */
1753     DC390_write8 (ScsiCmd, MSG_ACCEPTED_CMD);   /* ;to release the /ACK signal */
1754 }
1755
1756 static int __inline__
1757 dc390_RequestSense(struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
1758 {
1759         struct scsi_cmnd *pcmd;
1760
1761         pcmd = pSRB->pcmd;
1762
1763         REMOVABLEDEBUG(printk(KERN_INFO "DC390: RequestSense(Cmd %02x, Id %02x, LUN %02x)\n",\
1764                               pcmd->cmnd[0], pDCB->TargetID, pDCB->TargetLUN));
1765
1766         pSRB->SRBFlag |= AUTO_REQSENSE;
1767         pSRB->SavedSGCount = pcmd->use_sg;
1768         pSRB->SavedTotXLen = pSRB->TotalXferredLen;
1769         pSRB->AdaptStatus = 0;
1770         pSRB->TargetStatus = 0; /* CHECK_CONDITION<<1; */
1771
1772         /* We are called from SRBdone, original PCI mapping has been removed
1773          * already, new one is set up from StartSCSI */
1774         pSRB->SGIndex = 0;
1775
1776         pSRB->TotalXferredLen = 0;
1777         pSRB->SGToBeXferLen = 0;
1778         return dc390_StartSCSI(pACB, pDCB, pSRB);
1779 }
1780
1781
1782 static void
1783 dc390_SRBdone( struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB )
1784 {
1785     u8 status;
1786     struct scsi_cmnd *pcmd;
1787
1788     pcmd = pSRB->pcmd;
1789     /* KG: Moved pci_unmap here */
1790     dc390_pci_unmap(pSRB);
1791
1792     status = pSRB->TargetStatus;
1793
1794     DEBUG0(printk (" SRBdone (%02x,%08x), SRB %p, pid %li\n", status, pcmd->result,\
1795                 pSRB, pcmd->pid));
1796     if(pSRB->SRBFlag & AUTO_REQSENSE)
1797     {   /* Last command was a Request Sense */
1798         pSRB->SRBFlag &= ~AUTO_REQSENSE;
1799         pSRB->AdaptStatus = 0;
1800         pSRB->TargetStatus = CHECK_CONDITION << 1;
1801
1802         //pcmd->result = MK_RES(DRIVER_SENSE,DID_OK,0,status);
1803         if (status == (CHECK_CONDITION << 1))
1804             pcmd->result = MK_RES_LNX(0, DID_BAD_TARGET, 0, /*CHECK_CONDITION*/0);
1805         else /* Retry */
1806         {
1807             if( pSRB->pcmd->cmnd[0] == TEST_UNIT_READY /* || pSRB->pcmd->cmnd[0] == START_STOP */)
1808             {
1809                 /* Don't retry on TEST_UNIT_READY */
1810                 pcmd->result = MK_RES_LNX(DRIVER_SENSE,DID_OK,0,CHECK_CONDITION);
1811                 REMOVABLEDEBUG(printk(KERN_INFO "Cmd=%02x, Result=%08x, XferL=%08x\n",pSRB->pcmd->cmnd[0],\
1812                        (u32) pcmd->result, (u32) pSRB->TotalXferredLen));
1813             } else {
1814                 SET_RES_DRV(pcmd->result, DRIVER_SENSE);
1815                 pcmd->use_sg = pSRB->SavedSGCount;
1816                 //pSRB->ScsiCmdLen       = (u8) (pSRB->Segment1[0] >> 8);
1817                 DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->pid, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1818                 pSRB->TotalXferredLen = 0;
1819                 SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1820             }
1821         }
1822         goto cmd_done;
1823     }
1824     if( status )
1825     {
1826         if( status_byte(status) == CHECK_CONDITION )
1827         {
1828             if (dc390_RequestSense(pACB, pDCB, pSRB)) {
1829                 SET_RES_DID(pcmd->result, DID_ERROR);
1830                 goto cmd_done;
1831             }
1832             return;
1833         }
1834         else if( status_byte(status) == QUEUE_FULL )
1835         {
1836             scsi_track_queue_full(pcmd->device, pDCB->GoingSRBCnt - 1);
1837             pcmd->use_sg = pSRB->SavedSGCount;
1838             DEBUG0 (printk ("DC390: RETRY pid %li (%02x), target %02i-%02i\n", pcmd->pid, pcmd->cmnd[0], pcmd->device->id, pcmd->device->lun));
1839             pSRB->TotalXferredLen = 0;
1840             SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1841         }
1842         else if(status == SCSI_STAT_SEL_TIMEOUT)
1843         {
1844             pSRB->AdaptStatus = H_SEL_TIMEOUT;
1845             pSRB->TargetStatus = 0;
1846             pcmd->result = MK_RES(0,DID_NO_CONNECT,0,0);
1847             /* Devices are removed below ... */
1848         }
1849         else if (status_byte(status) == BUSY &&
1850                  (pcmd->cmnd[0] == TEST_UNIT_READY || pcmd->cmnd[0] == INQUIRY) &&
1851                  pACB->scan_devices)
1852         {
1853             pSRB->AdaptStatus = 0;
1854             pSRB->TargetStatus = status;
1855             pcmd->result = MK_RES(0,0,pSRB->EndMessage,/*status*/0);
1856         }
1857         else
1858         {   /* Another error */
1859             pSRB->TotalXferredLen = 0;
1860             SET_RES_DID(pcmd->result, DID_SOFT_ERROR);
1861             goto cmd_done;
1862         }
1863     }
1864     else
1865     {   /*  Target status == 0 */
1866         status = pSRB->AdaptStatus;
1867         if(status & H_OVER_UNDER_RUN)
1868         {
1869             pSRB->TargetStatus = 0;
1870             SET_RES_DID(pcmd->result,DID_OK);
1871             SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1872         }
1873         else if( pSRB->SRBStatus & PARITY_ERROR)
1874         {
1875             //pcmd->result = MK_RES(0,DID_PARITY,pSRB->EndMessage,0);
1876             SET_RES_DID(pcmd->result,DID_PARITY);
1877             SET_RES_MSG(pcmd->result,pSRB->EndMessage);
1878         }
1879         else                   /* No error */
1880         {
1881             pSRB->AdaptStatus = 0;
1882             pSRB->TargetStatus = 0;
1883             SET_RES_DID(pcmd->result,DID_OK);
1884         }
1885     }
1886
1887 cmd_done:
1888     pcmd->resid = pcmd->request_bufflen - pSRB->TotalXferredLen;
1889
1890     dc390_Going_remove (pDCB, pSRB);
1891     /* Add to free list */
1892     dc390_Free_insert (pACB, pSRB);
1893
1894     DEBUG0(printk (KERN_DEBUG "DC390: SRBdone: done pid %li\n", pcmd->pid));
1895     pcmd->scsi_done (pcmd);
1896
1897     return;
1898 }
1899
1900
1901 /* Remove all SRBs from Going list and inform midlevel */
1902 static void
1903 dc390_DoingSRB_Done(struct dc390_acb* pACB, struct scsi_cmnd *cmd)
1904 {
1905     struct dc390_dcb *pDCB, *pdcb;
1906     struct dc390_srb *psrb, *psrb2;
1907     int i;
1908     struct scsi_cmnd *pcmd;
1909
1910     pDCB = pACB->pLinkDCB;
1911     pdcb = pDCB;
1912     if (! pdcb) return;
1913     do
1914     {
1915         psrb = pdcb->pGoingSRB;
1916         for (i = 0; i < pdcb->GoingSRBCnt; i++)
1917         {
1918             psrb2 = psrb->pNextSRB;
1919             pcmd = psrb->pcmd;
1920             dc390_Free_insert (pACB, psrb);
1921             psrb  = psrb2;
1922         }
1923         pdcb->GoingSRBCnt = 0;
1924         pdcb->pGoingSRB = NULL;
1925         pdcb->TagMask = 0;
1926         pdcb = pdcb->pNextDCB;
1927     } while( pdcb != pDCB );
1928 }
1929
1930
1931 static void
1932 dc390_ResetSCSIBus( struct dc390_acb* pACB )
1933 {
1934     //DC390_write8 (ScsiCmd, RST_DEVICE_CMD);
1935     //udelay (250);
1936     //DC390_write8 (ScsiCmd, NOP_CMD);
1937
1938     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1939     DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1940     DC390_write8 (ScsiCmd, RST_SCSI_BUS_CMD);
1941     pACB->Connected = 0;
1942
1943     return;
1944 }
1945
1946 static void
1947 dc390_ScsiRstDetect( struct dc390_acb* pACB )
1948 {
1949     printk ("DC390: Rst_Detect: laststat = %08x\n", dc390_laststatus);
1950     //DEBUG0(printk(KERN_INFO "RST_DETECT,"));
1951
1952     DC390_write8 (DMA_Cmd, DMA_IDLE_CMD);
1953     /* Unlock before ? */
1954     /* delay half a second */
1955     udelay (1000);
1956     DC390_write8 (ScsiCmd, CLEAR_FIFO_CMD);
1957     pACB->pScsiHost->last_reset = jiffies + 5*HZ/2
1958                     + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
1959     pACB->Connected = 0;
1960
1961     if( pACB->ACBFlag & RESET_DEV )
1962         pACB->ACBFlag |= RESET_DONE;
1963     else
1964     {   /* Reset was issued by sb else */
1965         pACB->ACBFlag |= RESET_DETECT;
1966
1967         dc390_ResetDevParam( pACB );
1968         dc390_DoingSRB_Done( pACB, NULL);
1969         //dc390_RecoverSRB( pACB );
1970         pACB->pActiveDCB = NULL;
1971         pACB->ACBFlag = 0;
1972     }
1973     return;
1974 }
1975
1976 static int DC390_queuecommand(struct scsi_cmnd *cmd,
1977                 void (*done)(struct scsi_cmnd *))
1978 {
1979         struct scsi_device *sdev = cmd->device;
1980         struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
1981         struct dc390_dcb *dcb = sdev->hostdata;
1982         struct dc390_srb *srb;
1983
1984         if (sdev->queue_depth <= dcb->GoingSRBCnt)
1985                 goto device_busy;
1986         if (acb->pActiveDCB)
1987                 goto host_busy;
1988         if (acb->ACBFlag & (RESET_DETECT|RESET_DONE|RESET_DEV))
1989                 goto host_busy;
1990
1991         srb = acb->pFreeSRB;
1992         if (unlikely(srb == NULL))
1993                 goto host_busy;
1994
1995         cmd->scsi_done = done;
1996         cmd->result = 0;
1997         acb->Cmds++;
1998
1999         acb->pFreeSRB = srb->pNextSRB;
2000         srb->pNextSRB = NULL;
2001
2002         srb->pSRBDCB = dcb;
2003         srb->pcmd = cmd;
2004         cmd->host_scribble = (char *)srb;
2005
2006         srb->SGIndex = 0;
2007         srb->AdaptStatus = 0;
2008         srb->TargetStatus = 0;
2009         srb->MsgCnt = 0;
2010
2011         srb->SRBStatus = 0;
2012         srb->SRBFlag = 0;
2013         srb->SRBState = 0;
2014         srb->TotalXferredLen = 0;
2015         srb->SGBusAddr = 0;
2016         srb->SGToBeXferLen = 0;
2017         srb->ScsiPhase = 0;
2018         srb->EndMessage = 0;
2019         srb->TagNumber = SCSI_NO_TAG;
2020
2021         if (dc390_StartSCSI(acb, dcb, srb)) {
2022                 dc390_Free_insert(acb, srb);
2023                 goto host_busy;
2024         }
2025
2026         dc390_Going_append(dcb, srb);
2027
2028         return 0;
2029
2030  host_busy:
2031         return SCSI_MLQUEUE_HOST_BUSY;
2032
2033  device_busy:
2034         return SCSI_MLQUEUE_DEVICE_BUSY;
2035 }
2036
2037 static void dc390_dumpinfo (struct dc390_acb* pACB, struct dc390_dcb* pDCB, struct dc390_srb* pSRB)
2038 {
2039     struct pci_dev *pdev;
2040     u16 pstat;
2041
2042     if (!pDCB) pDCB = pACB->pActiveDCB;
2043     if (!pSRB && pDCB) pSRB = pDCB->pActiveSRB;
2044
2045     if (pSRB)
2046     {
2047         printk ("DC390: SRB: Xferred %08lx, Remain %08lx, State %08x, Phase %02x\n",
2048                 pSRB->TotalXferredLen, pSRB->SGToBeXferLen, pSRB->SRBState,
2049                 pSRB->ScsiPhase);
2050         printk ("DC390: AdpaterStatus: %02x, SRB Status %02x\n", pSRB->AdaptStatus, pSRB->SRBStatus);
2051     }
2052     printk ("DC390: Status of last IRQ (DMA/SC/Int/IRQ): %08x\n", dc390_laststatus);
2053     printk ("DC390: Register dump: SCSI block:\n");
2054     printk ("DC390: XferCnt  Cmd Stat IntS IRQS FFIS Ctl1 Ctl2 Ctl3 Ctl4\n");
2055     printk ("DC390:  %06x   %02x   %02x   %02x",
2056             DC390_read8(CtcReg_Low) + (DC390_read8(CtcReg_Mid) << 8) + (DC390_read8(CtcReg_High) << 16),
2057             DC390_read8(ScsiCmd), DC390_read8(Scsi_Status), DC390_read8(Intern_State));
2058     printk ("   %02x   %02x   %02x   %02x   %02x   %02x\n",
2059             DC390_read8(INT_Status), DC390_read8(Current_Fifo), DC390_read8(CtrlReg1),
2060             DC390_read8(CtrlReg2), DC390_read8(CtrlReg3), DC390_read8(CtrlReg4));
2061     DC390_write32 (DMA_ScsiBusCtrl, WRT_ERASE_DMA_STAT | EN_INT_ON_PCI_ABORT);
2062     if (DC390_read8(Current_Fifo) & 0x1f)
2063       {
2064         printk ("DC390: FIFO:");
2065         while (DC390_read8(Current_Fifo) & 0x1f) printk (" %02x", DC390_read8(ScsiFifo));
2066         printk ("\n");
2067       }
2068     printk ("DC390: Register dump: DMA engine:\n");
2069     printk ("DC390: Cmd   STrCnt    SBusA    WrkBC    WrkAC Stat SBusCtrl\n");
2070     printk ("DC390:  %02x %08x %08x %08x %08x   %02x %08x\n",
2071             DC390_read8(DMA_Cmd), DC390_read32(DMA_XferCnt), DC390_read32(DMA_XferAddr),
2072             DC390_read32(DMA_Wk_ByteCntr), DC390_read32(DMA_Wk_AddrCntr),
2073             DC390_read8(DMA_Status), DC390_read32(DMA_ScsiBusCtrl));
2074     DC390_write32 (DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
2075
2076     pdev = pACB->pdev;
2077     pci_read_config_word(pdev, PCI_STATUS, &pstat);
2078     printk ("DC390: Register dump: PCI Status: %04x\n", pstat);
2079     printk ("DC390: In case of driver trouble read Documentation/scsi/tmscsim.txt\n");
2080 }
2081
2082
2083 static int DC390_abort(struct scsi_cmnd *cmd)
2084 {
2085         struct dc390_acb *pACB = (struct dc390_acb*) cmd->device->host->hostdata;
2086         struct dc390_dcb *pDCB = (struct dc390_dcb*) cmd->device->hostdata;
2087
2088         scmd_printk(KERN_WARNING, cmd,
2089                 "DC390: Abort command (pid %li)\n", cmd->pid);
2090
2091         /* abort() is too stupid for already sent commands at the moment.
2092          * If it's called we are in trouble anyway, so let's dump some info
2093          * into the syslog at least. (KG, 98/08/20,99/06/20) */
2094         dc390_dumpinfo(pACB, pDCB, NULL);
2095
2096         pDCB->DCBFlag |= ABORT_DEV_;
2097         printk(KERN_INFO "DC390: Aborted pid %li\n", cmd->pid);
2098
2099         return FAILED;
2100 }
2101
2102
2103 static void dc390_ResetDevParam( struct dc390_acb* pACB )
2104 {
2105     struct dc390_dcb *pDCB, *pdcb;
2106
2107     pDCB = pACB->pLinkDCB;
2108     if (! pDCB) return;
2109     pdcb = pDCB;
2110     do
2111     {
2112         pDCB->SyncMode &= ~SYNC_NEGO_DONE;
2113         pDCB->SyncPeriod = 0;
2114         pDCB->SyncOffset = 0;
2115         pDCB->TagMask = 0;
2116         pDCB->CtrlR3 = FAST_CLK;
2117         pDCB->CtrlR4 &= NEGATE_REQACKDATA | CTRL4_RESERVED | NEGATE_REQACK;
2118         pDCB->CtrlR4 |= pACB->glitch_cfg;
2119         pDCB = pDCB->pNextDCB;
2120     }
2121     while( pdcb != pDCB );
2122     pACB->ACBFlag &= ~(RESET_DEV | RESET_DONE | RESET_DETECT);
2123
2124 }
2125
2126 static int DC390_bus_reset (struct scsi_cmnd *cmd)
2127 {
2128         struct dc390_acb*    pACB = (struct dc390_acb*) cmd->device->host->hostdata;
2129         u8   bval;
2130
2131         spin_lock_irq(cmd->device->host->host_lock);
2132
2133         bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2134         DC390_write8(CtrlReg1, bval);   /* disable IRQ on bus reset */
2135
2136         pACB->ACBFlag |= RESET_DEV;
2137         dc390_ResetSCSIBus(pACB);
2138
2139         dc390_ResetDevParam(pACB);
2140         mdelay(1);
2141         pACB->pScsiHost->last_reset = jiffies + 3*HZ/2
2142                 + HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2143
2144         DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2145         DC390_read8(INT_Status);                /* Reset Pending INT */
2146
2147         dc390_DoingSRB_Done(pACB, cmd);
2148
2149         pACB->pActiveDCB = NULL;
2150         pACB->ACBFlag = 0;
2151
2152         bval = DC390_read8(CtrlReg1) & ~DIS_INT_ON_SCSI_RST;
2153         DC390_write8(CtrlReg1, bval);   /* re-enable interrupt */
2154
2155         spin_unlock_irq(cmd->device->host->host_lock);
2156
2157         return SUCCESS;
2158 }
2159
2160 /**
2161  * dc390_slave_alloc - Called by the scsi mid layer to tell us about a new
2162  * scsi device that we need to deal with.
2163  *
2164  * @scsi_device: The new scsi device that we need to handle.
2165  */
2166 static int dc390_slave_alloc(struct scsi_device *scsi_device)
2167 {
2168         struct dc390_acb *pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2169         struct dc390_dcb *pDCB, *pDCB2 = NULL;
2170         uint id = scsi_device->id;
2171         uint lun = scsi_device->lun;
2172
2173         pDCB = kmalloc(sizeof(struct dc390_dcb), GFP_KERNEL);
2174         if (!pDCB)
2175                 return -ENOMEM;
2176         memset(pDCB, 0, sizeof(struct dc390_dcb));
2177
2178         if (!pACB->DCBCnt++) {
2179                 pACB->pLinkDCB = pDCB;
2180                 pACB->pDCBRunRobin = pDCB;
2181         } else {
2182                 pACB->pLastDCB->pNextDCB = pDCB;
2183         }
2184
2185         pDCB->pNextDCB = pACB->pLinkDCB;
2186         pACB->pLastDCB = pDCB;
2187
2188         pDCB->pDCBACB = pACB;
2189         pDCB->TargetID = id;
2190         pDCB->TargetLUN = lun;
2191
2192         /*
2193          * Some values are for all LUNs: Copy them
2194          * In a clean way: We would have an own structure for a SCSI-ID
2195          */
2196         if (lun && (pDCB2 = dc390_findDCB(pACB, id, 0))) {
2197                 pDCB->DevMode = pDCB2->DevMode;
2198                 pDCB->SyncMode = pDCB2->SyncMode & SYNC_NEGO_DONE;
2199                 pDCB->SyncPeriod = pDCB2->SyncPeriod;
2200                 pDCB->SyncOffset = pDCB2->SyncOffset;
2201                 pDCB->NegoPeriod = pDCB2->NegoPeriod;
2202
2203                 pDCB->CtrlR3 = pDCB2->CtrlR3;
2204                 pDCB->CtrlR4 = pDCB2->CtrlR4;
2205         } else {
2206                 u8 index = pACB->AdapterIndex;
2207                 PEEprom prom = (PEEprom) &dc390_eepromBuf[index][id << 2];
2208
2209                 pDCB->DevMode = prom->EE_MODE1;
2210                 pDCB->NegoPeriod =
2211                         (dc390_clock_period1[prom->EE_SPEED] * 25) >> 2;
2212                 pDCB->CtrlR3 = FAST_CLK;
2213                 pDCB->CtrlR4 = pACB->glitch_cfg | CTRL4_RESERVED;
2214                 if (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION)
2215                         pDCB->CtrlR4 |= NEGATE_REQACKDATA | NEGATE_REQACK;
2216         }
2217
2218         if (pDCB->DevMode & SYNC_NEGO_)
2219                 pDCB->SyncMode |= SYNC_ENABLE;
2220         else {
2221                 pDCB->SyncMode = 0;
2222                 pDCB->SyncOffset &= ~0x0f;
2223         }
2224
2225         pDCB->CtrlR1 = pACB->pScsiHost->this_id;
2226         if (pDCB->DevMode & PARITY_CHK_)
2227                 pDCB->CtrlR1 |= PARITY_ERR_REPO;
2228
2229         pACB->scan_devices = 1;
2230         scsi_device->hostdata = pDCB;
2231         return 0;
2232 }
2233
2234 /**
2235  * dc390_slave_destroy - Called by the scsi mid layer to tell us about a
2236  * device that is going away.
2237  *
2238  * @scsi_device: The scsi device that we need to remove.
2239  */
2240 static void dc390_slave_destroy(struct scsi_device *scsi_device)
2241 {
2242         struct dc390_acb* pACB = (struct dc390_acb*) scsi_device->host->hostdata;
2243         struct dc390_dcb* pDCB = (struct dc390_dcb*) scsi_device->hostdata;
2244         struct dc390_dcb* pPrevDCB = pACB->pLinkDCB;
2245
2246         pACB->scan_devices = 0;
2247
2248         BUG_ON(pDCB->GoingSRBCnt > 1);
2249
2250         if (pDCB == pACB->pLinkDCB) {
2251                 if (pACB->pLastDCB == pDCB) {
2252                         pDCB->pNextDCB = NULL;
2253                         pACB->pLastDCB = NULL;
2254                 }
2255                 pACB->pLinkDCB = pDCB->pNextDCB;
2256         } else {
2257                 while (pPrevDCB->pNextDCB != pDCB)
2258                         pPrevDCB = pPrevDCB->pNextDCB;
2259                 pPrevDCB->pNextDCB = pDCB->pNextDCB;
2260                 if (pDCB == pACB->pLastDCB)
2261                         pACB->pLastDCB = pPrevDCB;
2262         }
2263
2264         if (pDCB == pACB->pActiveDCB)
2265                 pACB->pActiveDCB = NULL;
2266         if (pDCB == pACB->pLinkDCB)
2267                 pACB->pLinkDCB = pDCB->pNextDCB;
2268         if (pDCB == pACB->pDCBRunRobin)
2269                 pACB->pDCBRunRobin = pDCB->pNextDCB;
2270         kfree(pDCB);
2271
2272         pACB->DCBCnt--;
2273 }
2274
2275 static int dc390_slave_configure(struct scsi_device *sdev)
2276 {
2277         struct dc390_acb *acb = (struct dc390_acb *)sdev->host->hostdata;
2278         struct dc390_dcb *dcb = (struct dc390_dcb *)sdev->hostdata;
2279
2280         acb->scan_devices = 0;
2281         if (sdev->tagged_supported && (dcb->DevMode & TAG_QUEUEING_)) {
2282                 dcb->SyncMode |= EN_TAG_QUEUEING;
2283                 scsi_activate_tcq(sdev, acb->TagMaxNum);
2284         }
2285
2286         return 0;
2287 }
2288
2289 static struct scsi_host_template driver_template = {
2290         .module                 = THIS_MODULE,
2291         .proc_name              = "tmscsim",
2292         .name                   = DC390_BANNER " V" DC390_VERSION,
2293         .slave_alloc            = dc390_slave_alloc,
2294         .slave_configure        = dc390_slave_configure,
2295         .slave_destroy          = dc390_slave_destroy,
2296         .queuecommand           = DC390_queuecommand,
2297         .eh_abort_handler       = DC390_abort,
2298         .eh_bus_reset_handler   = DC390_bus_reset,
2299         .can_queue              = 1,
2300         .this_id                = 7,
2301         .sg_tablesize           = SG_ALL,
2302         .cmd_per_lun            = 1,
2303         .use_clustering         = DISABLE_CLUSTERING,
2304 };
2305
2306 /***********************************************************************
2307  * Functions for access to DC390 EEPROM
2308  * and some to emulate it
2309  *
2310  **********************************************************************/
2311
2312 static void __devinit dc390_eeprom_prepare_read(struct pci_dev *pdev, u8 cmd)
2313 {
2314         u8 carryFlag = 1, j = 0x80, bval;
2315         int i;
2316
2317         for (i = 0; i < 9; i++) {
2318                 if (carryFlag) {
2319                         pci_write_config_byte(pdev, 0x80, 0x40);
2320                         bval = 0xc0;
2321                 } else
2322                         bval = 0x80;
2323
2324                 udelay(160);
2325                 pci_write_config_byte(pdev, 0x80, bval);
2326                 udelay(160);
2327                 pci_write_config_byte(pdev, 0x80, 0);
2328                 udelay(160);
2329
2330                 carryFlag = (cmd & j) ? 1 : 0;
2331                 j >>= 1;
2332         }
2333 }
2334
2335 static u16 __devinit dc390_eeprom_get_data(struct pci_dev *pdev)
2336 {
2337         int i;
2338         u16 wval = 0;
2339         u8 bval;
2340
2341         for (i = 0; i < 16; i++) {
2342                 wval <<= 1;
2343
2344                 pci_write_config_byte(pdev, 0x80, 0x80);
2345                 udelay(160);
2346                 pci_write_config_byte(pdev, 0x80, 0x40);
2347                 udelay(160);
2348                 pci_read_config_byte(pdev, 0x00, &bval);
2349
2350                 if (bval == 0x22)
2351                         wval |= 1;
2352         }
2353
2354         return wval;
2355 }
2356
2357 static void __devinit dc390_read_eeprom(struct pci_dev *pdev, u16 *ptr)
2358 {
2359         u8 cmd = EEPROM_READ, i;
2360
2361         for (i = 0; i < 0x40; i++) {
2362                 pci_write_config_byte(pdev, 0xc0, 0);
2363                 udelay(160);
2364
2365                 dc390_eeprom_prepare_read(pdev, cmd++);
2366                 *ptr++ = dc390_eeprom_get_data(pdev);
2367
2368                 pci_write_config_byte(pdev, 0x80, 0);
2369                 pci_write_config_byte(pdev, 0x80, 0);
2370                 udelay(160);
2371         }
2372 }
2373
2374 /* Override EEprom values with explicitly set values */
2375 static void __devinit dc390_eeprom_override(u8 index)
2376 {
2377         u8 *ptr = (u8 *) dc390_eepromBuf[index], id;
2378
2379         /* Adapter Settings */
2380         if (tmscsim[0] != -2)
2381                 ptr[EE_ADAPT_SCSI_ID] = (u8)tmscsim[0]; /* Adapter ID */
2382         if (tmscsim[3] != -2)
2383                 ptr[EE_MODE2] = (u8)tmscsim[3];
2384         if (tmscsim[5] != -2)
2385                 ptr[EE_DELAY] = tmscsim[5];             /* Reset delay */
2386         if (tmscsim[4] != -2)
2387                 ptr[EE_TAG_CMD_NUM] = (u8)tmscsim[4];   /* Tagged Cmds */
2388
2389         /* Device Settings */
2390         for (id = 0; id < MAX_SCSI_ID; id++) {
2391                 if (tmscsim[2] != -2)
2392                         ptr[id << 2] = (u8)tmscsim[2];          /* EE_MODE1 */
2393                 if (tmscsim[1] != -2)
2394                         ptr[(id << 2) + 1] = (u8)tmscsim[1];    /* EE_Speed */
2395         }
2396 }
2397
2398 static int __devinitdata tmscsim_def[] = {
2399         7,
2400         0 /* 10MHz */,
2401         PARITY_CHK_ | SEND_START_ | EN_DISCONNECT_ | SYNC_NEGO_ | TAG_QUEUEING_,
2402         MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION | LUN_CHECK,
2403         3 /* 16 Tags per LUN */,
2404         1 /* s delay after Reset */,
2405 };
2406
2407 /* Copy defaults over set values where missing */
2408 static void __devinit dc390_fill_with_defaults (void)
2409 {
2410         int i;
2411
2412         for (i = 0; i < 6; i++) {
2413                 if (tmscsim[i] < 0 || tmscsim[i] > 255)
2414                         tmscsim[i] = tmscsim_def[i];
2415         }
2416
2417         /* Sanity checks */
2418         if (tmscsim[0] > 7)
2419                 tmscsim[0] = 7;
2420         if (tmscsim[1] > 7)
2421                 tmscsim[1] = 4;
2422         if (tmscsim[4] > 5)
2423                 tmscsim[4] = 4;
2424         if (tmscsim[5] > 180)
2425                 tmscsim[5] = 180;
2426 }
2427
2428 static void __devinit dc390_check_eeprom(struct pci_dev *pdev, u8 index)
2429 {
2430         u8 interpd[] = {1, 3, 5, 10, 16, 30, 60, 120};
2431         u8 EEbuf[128];
2432         u16 *ptr = (u16 *)EEbuf, wval = 0;
2433         int i;
2434
2435         dc390_read_eeprom(pdev, ptr);
2436         memcpy(dc390_eepromBuf[index], EEbuf, EE_ADAPT_SCSI_ID);
2437         memcpy(&dc390_eepromBuf[index][EE_ADAPT_SCSI_ID],
2438                &EEbuf[REAL_EE_ADAPT_SCSI_ID], EE_LEN - EE_ADAPT_SCSI_ID);
2439
2440         dc390_eepromBuf[index][EE_DELAY] = interpd[dc390_eepromBuf[index][EE_DELAY]];
2441
2442         for (i = 0; i < 0x40; i++, ptr++)
2443                 wval += *ptr;
2444
2445         /* no Tekram EEprom found */
2446         if (wval != 0x1234) {
2447                 int speed;
2448
2449                 printk(KERN_INFO "DC390_init: No EEPROM found! Trying default settings ...\n");
2450
2451                 /*
2452                  * XXX(hch): bogus, because we might have tekram and
2453                  *           non-tekram hbas in a single machine.
2454                  */
2455                 dc390_fill_with_defaults();
2456
2457                 speed = dc390_clock_speed[tmscsim[1]];
2458                 printk(KERN_INFO "DC390: Used defaults: AdaptID=%i, SpeedIdx=%i (%i.%i MHz), "
2459                        "DevMode=0x%02x, AdaptMode=0x%02x, TaggedCmnds=%i (%i), DelayReset=%is\n",
2460                        tmscsim[0], tmscsim[1], speed / 10, speed % 10,
2461                        (u8)tmscsim[2], (u8)tmscsim[3], tmscsim[4], 2 << (tmscsim[4]), tmscsim[5]);
2462         }
2463 }
2464
2465 static void __devinit dc390_init_hw(struct dc390_acb *pACB, u8 index)
2466 {
2467         struct Scsi_Host *shost = pACB->pScsiHost;
2468         u8 dstate;
2469
2470         /* Disable SCSI bus reset interrupt */
2471         DC390_write8(CtrlReg1, DIS_INT_ON_SCSI_RST | shost->this_id);
2472
2473         if (pACB->Gmode2 & RST_SCSI_BUS) {
2474                 dc390_ResetSCSIBus(pACB);
2475                 udelay(1000);
2476                 shost->last_reset = jiffies + HZ/2 +
2477                         HZ * dc390_eepromBuf[pACB->AdapterIndex][EE_DELAY];
2478         }
2479
2480         pACB->ACBFlag = 0;
2481
2482         /* Reset Pending INT */
2483         DC390_read8(INT_Status);
2484
2485         /* 250ms selection timeout */
2486         DC390_write8(Scsi_TimeOut, SEL_TIMEOUT);
2487
2488         /* Conversion factor = 0 , 40MHz clock */
2489         DC390_write8(Clk_Factor, CLK_FREQ_40MHZ);
2490
2491         /* NOP cmd - clear command register */
2492         DC390_write8(ScsiCmd, NOP_CMD);
2493
2494         /* Enable Feature and SCSI-2 */
2495         DC390_write8(CtrlReg2, EN_FEATURE+EN_SCSI2_CMD);
2496
2497         /* Fast clock */
2498         DC390_write8(CtrlReg3, FAST_CLK);
2499
2500         /* Negation */
2501         DC390_write8(CtrlReg4, pACB->glitch_cfg | /* glitch eater */
2502                 (dc390_eepromBuf[index][EE_MODE2] & ACTIVE_NEGATION) ?
2503                  NEGATE_REQACKDATA : 0);
2504
2505         /* Clear Transfer Count High: ID */
2506         DC390_write8(CtcReg_High, 0);
2507         DC390_write8(DMA_Cmd, DMA_IDLE_CMD);
2508         DC390_write8(ScsiCmd, CLEAR_FIFO_CMD);
2509         DC390_write32(DMA_ScsiBusCtrl, EN_INT_ON_PCI_ABORT);
2510
2511         dstate = DC390_read8(DMA_Status);
2512         DC390_write8(DMA_Status, dstate);
2513 }
2514
2515 static int __devinit dc390_probe_one(struct pci_dev *pdev,
2516                                     const struct pci_device_id *id)
2517 {
2518         struct dc390_acb *pACB;
2519         struct Scsi_Host *shost;
2520         unsigned long io_port;
2521         int error = -ENODEV, i;
2522
2523         if (pci_enable_device(pdev))
2524                 goto out;
2525
2526         pci_set_master(pdev);
2527
2528         error = -ENOMEM;
2529         shost = scsi_host_alloc(&driver_template, sizeof(struct dc390_acb));
2530         if (!shost)
2531                 goto out_disable_device;
2532
2533         pACB = (struct dc390_acb *)shost->hostdata;
2534         memset(pACB, 0, sizeof(struct dc390_acb));
2535
2536         dc390_check_eeprom(pdev, dc390_adapterCnt);
2537         dc390_eeprom_override(dc390_adapterCnt);
2538
2539         io_port = pci_resource_start(pdev, 0);
2540
2541         shost->this_id = dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID];
2542         shost->io_port = io_port;
2543         shost->n_io_port = 0x80;
2544         shost->irq = pdev->irq;
2545         shost->base = io_port;
2546         shost->unique_id = io_port;
2547         shost->last_reset = jiffies;
2548
2549         pACB->pScsiHost = shost;
2550         pACB->IOPortBase = (u16) io_port;
2551         pACB->IRQLevel = pdev->irq;
2552
2553         shost->max_id = 8;
2554
2555         if (shost->max_id - 1 ==
2556             dc390_eepromBuf[dc390_adapterCnt][EE_ADAPT_SCSI_ID])
2557                 shost->max_id--;
2558
2559         if (dc390_eepromBuf[dc390_adapterCnt][EE_MODE2] & LUN_CHECK)
2560                 shost->max_lun = 8;
2561         else
2562                 shost->max_lun = 1;
2563
2564         pACB->pFreeSRB = pACB->SRB_array;
2565         pACB->SRBCount = MAX_SRB_CNT;
2566         pACB->AdapterIndex = dc390_adapterCnt;
2567         pACB->TagMaxNum =
2568                 2 << dc390_eepromBuf[dc390_adapterCnt][EE_TAG_CMD_NUM];
2569         pACB->Gmode2 = dc390_eepromBuf[dc390_adapterCnt][EE_MODE2];
2570
2571         for (i = 0; i < pACB->SRBCount-1; i++)
2572                 pACB->SRB_array[i].pNextSRB = &pACB->SRB_array[i+1];
2573         pACB->SRB_array[pACB->SRBCount-1].pNextSRB = NULL;
2574         pACB->pTmpSRB = &pACB->TmpSRB;
2575
2576         pACB->sel_timeout = SEL_TIMEOUT;
2577         pACB->glitch_cfg = EATER_25NS;
2578         pACB->pdev = pdev;
2579
2580         if (!request_region(io_port, shost->n_io_port, "tmscsim")) {
2581                 printk(KERN_ERR "DC390: register IO ports error!\n");
2582                 goto out_host_put;
2583         }
2584
2585         /* Reset Pending INT */
2586         DC390_read8_(INT_Status, io_port);
2587
2588         if (request_irq(pdev->irq, do_DC390_Interrupt, SA_SHIRQ,
2589                                 "tmscsim", pACB)) {
2590                 printk(KERN_ERR "DC390: register IRQ error!\n");
2591                 goto out_release_region;
2592         }
2593
2594         dc390_init_hw(pACB, dc390_adapterCnt);
2595
2596         dc390_adapterCnt++;
2597
2598         pci_set_drvdata(pdev, shost);
2599
2600         error = scsi_add_host(shost, &pdev->dev);
2601         if (error)
2602                 goto out_free_irq;
2603         scsi_scan_host(shost);
2604         return 0;
2605
2606  out_free_irq:
2607         free_irq(pdev->irq, pACB);
2608  out_release_region:
2609         release_region(io_port, shost->n_io_port);
2610  out_host_put:
2611         scsi_host_put(shost);
2612  out_disable_device:
2613         pci_disable_device(pdev);
2614  out:
2615         return error;
2616 }
2617
2618 /**
2619  * dc390_remove_one - Called to remove a single instance of the adapter.
2620  *
2621  * @dev: The PCI device to remove.
2622  */
2623 static void __devexit dc390_remove_one(struct pci_dev *dev)
2624 {
2625         struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
2626         unsigned long iflags;
2627         struct dc390_acb* pACB = (struct dc390_acb*) scsi_host->hostdata;
2628         u8 bval;
2629
2630         scsi_remove_host(scsi_host);
2631
2632         spin_lock_irqsave(scsi_host->host_lock, iflags);
2633         pACB->ACBFlag = RESET_DEV;
2634         bval = DC390_read8(CtrlReg1) | DIS_INT_ON_SCSI_RST;
2635         DC390_write8 (CtrlReg1, bval);  /* disable interrupt */
2636         if (pACB->Gmode2 & RST_SCSI_BUS)
2637                 dc390_ResetSCSIBus(pACB);
2638         spin_unlock_irqrestore(scsi_host->host_lock, iflags);
2639
2640         free_irq(scsi_host->irq, pACB);
2641         release_region(scsi_host->io_port, scsi_host->n_io_port);
2642
2643         pci_disable_device(dev);
2644         scsi_host_put(scsi_host);
2645         pci_set_drvdata(dev, NULL);
2646 }
2647
2648 static struct pci_device_id tmscsim_pci_tbl[] = {
2649         { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD53C974,
2650                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
2651         { }
2652 };
2653 MODULE_DEVICE_TABLE(pci, tmscsim_pci_tbl);
2654
2655 static struct pci_driver dc390_driver = {
2656         .name           = "tmscsim",
2657         .id_table       = tmscsim_pci_tbl,
2658         .probe          = dc390_probe_one,
2659         .remove         = __devexit_p(dc390_remove_one),
2660 };
2661
2662 static int __init dc390_module_init(void)
2663 {
2664         if (tmscsim[0] == -1 || tmscsim[0] > 15) {
2665                 tmscsim[0] = 7;
2666                 tmscsim[1] = 4;
2667                 tmscsim[2] = PARITY_CHK_ | TAG_QUEUEING_;
2668                 tmscsim[3] = MORE2_DRV | GREATER_1G | RST_SCSI_BUS | ACTIVE_NEGATION;
2669                 tmscsim[4] = 2;
2670                 tmscsim[5] = 10;
2671                 printk (KERN_INFO "DC390: Using safe settings.\n");
2672         }
2673
2674         return pci_module_init(&dc390_driver);
2675 }
2676
2677 static void __exit dc390_module_exit(void)
2678 {
2679         pci_unregister_driver(&dc390_driver);
2680 }
2681
2682 module_init(dc390_module_init);
2683 module_exit(dc390_module_exit);
2684
2685 #ifndef MODULE
2686 static int __init dc390_setup (char *str)
2687 {
2688         int ints[8],i, im;
2689
2690         get_options(str, ARRAY_SIZE(ints), ints);
2691         im = ints[0];
2692
2693         if (im > 6) {
2694                 printk (KERN_NOTICE "DC390: ignore extra params!\n");
2695                 im = 6;
2696         }
2697
2698         for (i = 0; i < im; i++)
2699                 tmscsim[i] = ints[i+1];
2700         /* dc390_checkparams (); */
2701         return 1;
2702 }
2703
2704 __setup("tmscsim=", dc390_setup);
2705 #endif