aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/scsi/dc395x.c
blob: 7b8a3457b6962c78734811fa918978aed2c9b07a (plain) (tree)
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907























































































































































































                                                                                                                   
 












































                                                                                              
                                                                                       

                                                                                   
                                                                                              







                                                                       
                                                                             





































































































































































































































































































                                                                               
                                                             









































































                                                                                                                              
                                                                


























































































































                                                                                   
                                                                






































































































































































































































                                                                              


                                                                      
                 







                                                             










                                                           


                                           
                                                                             

                                                                              
                      
                                               
                                                     

                                     
                                 

                                                                              
 

                                                              
                                                 
                                                         
                 























                                                                            
         
                                                     



















































































































































                                                                                        
                                                             





















































































                                                                               
                                                       











































                                                                         








                                                      




































                                                                            
                                                                        
                                                        
                                                                      






















































































































































































































































































































































































































                                                                                           
                                                          
 
                                           
















































































































































                                                                                                                 
                           


                                                            
                                                                           




























                                                                          









                                                                     
                                                        

























































                                                                                  
                                                      







































                                                                                    
                                                                        













                                                                                        
                                                    




























                                                                                          
                                                             





























                                                                              


                                                                             
 















                                                                                     

                                    


































                                                                                            

                                                                




                                                                         
                           
                                                                                
                           





                                                                                                
                                                                
                                                                                

                                                                          
                                                                     


                                                                          


                                                                  






                                                                                               
 





                                                                                      
                                                                      




























                                                                                                 
                                                            












































































































                                                                                       
                                                              













































                                                                                                                 
                                                                

                                                                          
 


                                                                  





                                                                                         
 



                                                                       
 
                                                                                         
 

                                                             
                                                            

















































































































































































































































































































































































































































































































































































































































































































































































                                                                                                                         
                                                        





                                                                        
                                                                  
                                           
                                    































                                                                         
                                                             
                         

                                                                           
                                                                    
                                                                         






























































































































                                                                                                        


                                                                   
                     

                            


                                           
                                                                    
 

                                                                                  
                                                             
                                                                  

                                                                             
                                                                                                 





                                                       
                 
                                            
         
                                                         
                                                    









































































































































































































































                                                                                                   
                                                          











































































































































































































































































































































































                                                                                         
                         






























































































































































                                                                                                       
                                                   













                                                                               
 
                                                
                                                   

                                                                      
                                                     














                                                                                  































































































































































































































                                                                                              
                                                                                
































































































































































































































































































































































































                                                                                               
                                                   
















                                                                                                                  
/*
 * dc395x.c
 *
 * Device Driver for Tekram DC395(U/UW/F), DC315(U)
 * PCI SCSI Bus Master Host Adapter
 * (SCSI chip set used Tekram ASIC TRM-S1040)
 *
 * Authors:
 *  C.L. Huang <ching@tekram.com.tw>
 *  Erich Chen <erich@tekram.com.tw>
 *  (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
 *
 *  Kurt Garloff <garloff@suse.de>
 *  (C) 1999-2000 Kurt Garloff
 *
 *  Oliver Neukum <oliver@neukum.name>
 *  Ali Akcaagac <aliakc@web.de>
 *  Jamie Lenehan <lenehan@twibble.org>
 *  (C) 2003
 *
 * License: GNU GPL
 *
 *************************************************************************
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 ************************************************************************
 */
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/delay.h>
#include <linux/ctype.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/vmalloc.h>
#include <asm/io.h>

#include <scsi/scsi.h>
#include <scsi/scsicam.h>	/* needed for scsicam_bios_param */
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>

#include "dc395x.h"

#define DC395X_NAME	"dc395x"
#define DC395X_BANNER	"Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
#define DC395X_VERSION	"v2.05, 2004/03/08"

/*---------------------------------------------------------------------------
                                  Features
 ---------------------------------------------------------------------------*/
/*
 * Set to disable parts of the driver
 */
/*#define DC395x_NO_DISCONNECT*/
/*#define DC395x_NO_TAGQ*/
/*#define DC395x_NO_SYNC*/
/*#define DC395x_NO_WIDE*/

/*---------------------------------------------------------------------------
                                  Debugging
 ---------------------------------------------------------------------------*/
/*
 * Types of debugging that can be enabled and disabled
 */
#define DBG_KG		0x0001
#define DBG_0		0x0002
#define DBG_1		0x0004
#define DBG_SG		0x0020
#define DBG_FIFO	0x0040
#define DBG_PIO		0x0080


/*
 * Set set of things to output debugging for.
 * Undefine to remove all debugging
 */
/*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
/*#define  DEBUG_MASK	DBG_0*/


/*
 * Output a kernel mesage at the specified level and append the
 * driver name and a ": " to the start of the message
 */
#define dprintkl(level, format, arg...)  \
    printk(level DC395X_NAME ": " format , ## arg)


#ifdef DEBUG_MASK
/*
 * print a debug message - this is formated with KERN_DEBUG, then the
 * driver name followed by a ": " and then the message is output. 
 * This also checks that the specified debug level is enabled before
 * outputing the message
 */
#define dprintkdbg(type, format, arg...) \
	do { \
		if ((type) & (DEBUG_MASK)) \
			dprintkl(KERN_DEBUG , format , ## arg); \
	} while (0)

/*
 * Check if the specified type of debugging is enabled
 */
#define debug_enabled(type)	((DEBUG_MASK) & (type))

#else
/*
 * No debugging. Do nothing
 */
#define dprintkdbg(type, format, arg...) \
	do {} while (0)
#define debug_enabled(type)	(0)

#endif


#ifndef PCI_VENDOR_ID_TEKRAM
#define PCI_VENDOR_ID_TEKRAM                    0x1DE1	/* Vendor ID    */
#endif
#ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
#define PCI_DEVICE_ID_TEKRAM_TRMS1040           0x0391	/* Device ID    */
#endif


#define DC395x_LOCK_IO(dev,flags)		spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
#define DC395x_UNLOCK_IO(dev,flags)		spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)

#define DC395x_read8(acb,address)		(u8)(inb(acb->io_port_base + (address)))
#define DC395x_read16(acb,address)		(u16)(inw(acb->io_port_base + (address)))
#define DC395x_read32(acb,address)		(u32)(inl(acb->io_port_base + (address)))
#define DC395x_write8(acb,address,value)	outb((value), acb->io_port_base + (address))
#define DC395x_write16(acb,address,value)	outw((value), acb->io_port_base + (address))
#define DC395x_write32(acb,address,value)	outl((value), acb->io_port_base + (address))

/* cmd->result */
#define RES_TARGET		0x000000FF	/* Target State */
#define RES_TARGET_LNX  STATUS_MASK	/* Only official ... */
#define RES_ENDMSG		0x0000FF00	/* End Message */
#define RES_DID			0x00FF0000	/* DID_ codes */
#define RES_DRV			0xFF000000	/* DRIVER_ codes */

#define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
#define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)

#define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
#define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
#define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
#define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
#define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }

#define TAG_NONE 255

/*
 * srb->segement_x is the hw sg list. It is always allocated as a
 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
 * cross a page boundy.
 */
#define SEGMENTX_LEN	(sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)


struct SGentry {
	u32 address;		/* bus! address */
	u32 length;
};

/* The SEEPROM structure for TRM_S1040 */
struct NVRamTarget {
	u8 cfg0;		/* Target configuration byte 0  */
	u8 period;		/* Target period                */
	u8 cfg2;		/* Target configuration byte 2  */
	u8 cfg3;		/* Target configuration byte 3  */
};

struct NvRamType {
	u8 sub_vendor_id[2];	/* 0,1  Sub Vendor ID   */
	u8 sub_sys_id[2];	/* 2,3  Sub System ID   */
	u8 sub_class;		/* 4    Sub Class       */
	u8 vendor_id[2];	/* 5,6  Vendor ID       */
	u8 device_id[2];	/* 7,8  Device ID       */
	u8 reserved;		/* 9    Reserved        */
	struct NVRamTarget target[DC395x_MAX_SCSI_ID];
						/** 10,11,12,13
						 ** 14,15,16,17
						 ** ....
						 ** ....
						 ** 70,71,72,73
						 */
	u8 scsi_id;		/* 74 Host Adapter SCSI ID      */
	u8 channel_cfg;		/* 75 Channel configuration     */
	u8 delay_time;		/* 76 Power on delay time       */
	u8 max_tag;		/* 77 Maximum tags              */
	u8 reserved0;		/* 78  */
	u8 boot_target;		/* 79  */
	u8 boot_lun;		/* 80  */
	u8 reserved1;		/* 81  */
	u16 reserved2[22];	/* 82,..125 */
	u16 cksum;		/* 126,127 */
};

struct ScsiReqBlk {
	struct list_head list;		/* next/prev ptrs for srb lists */
	struct DeviceCtlBlk *dcb;
	struct scsi_cmnd *cmd;

	struct SGentry *segment_x;	/* Linear array of hw sg entries (up to 64 entries) */
	dma_addr_t sg_bus_addr;	        /* Bus address of sg list (ie, of segment_x) */

	u8 sg_count;			/* No of HW sg entries for this request */
	u8 sg_index;			/* Index of HW sg entry for this request */
	size_t total_xfer_length;	/* Total number of bytes remaining to be transfered */
	size_t request_length;		/* Total number of bytes in this request */
	/*
	 * The sense buffer handling function, request_sense, uses
	 * the first hw sg entry (segment_x[0]) and the transfer
	 * length (total_xfer_length). While doing this it stores the
	 * original values into the last sg hw list
	 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
	 * total_xfer_length in xferred. These values are restored in
	 * pci_unmap_srb_sense. This is the only place xferred is used.
	 */
	size_t xferred;		        /* Saved copy of total_xfer_length */

	u16 state;

	u8 msgin_buf[6];
	u8 msgout_buf[6];

	u8 adapter_status;
	u8 target_status;
	u8 msg_count;
	u8 end_message;

	u8 tag_number;
	u8 status;
	u8 retry_count;
	u8 flag;

	u8 scsi_phase;
};

struct DeviceCtlBlk {
	struct list_head list;		/* next/prev ptrs for the dcb list */
	struct AdapterCtlBlk *acb;
	struct list_head srb_going_list;	/* head of going srb list */
	struct list_head srb_waiting_list;	/* head of waiting srb list */

	struct ScsiReqBlk *active_srb;
	u32 tag_mask;

	u16 max_command;

	u8 target_id;		/* SCSI Target ID  (SCSI Only) */
	u8 target_lun;		/* SCSI Log.  Unit (SCSI Only) */
	u8 identify_msg;
	u8 dev_mode;

	u8 inquiry7;		/* To store Inquiry flags */
	u8 sync_mode;		/* 0:async mode */
	u8 min_nego_period;	/* for nego. */
	u8 sync_period;		/* for reg.  */

	u8 sync_offset;		/* for reg. and nego.(low nibble) */
	u8 flag;
	u8 dev_type;
	u8 init_tcq_flag;
};

struct AdapterCtlBlk {
	struct Scsi_Host *scsi_host;

	unsigned long io_port_base;
	unsigned long io_port_len;

	struct list_head dcb_list;		/* head of going dcb list */
	struct DeviceCtlBlk *dcb_run_robin;
	struct DeviceCtlBlk *active_dcb;

	struct list_head srb_free_list;		/* head of free srb list */
	struct ScsiReqBlk *tmp_srb;
	struct timer_list waiting_timer;
	struct timer_list selto_timer;

	u16 srb_count;

	u8 sel_timeout;

	unsigned int irq_level;
	u8 tag_max_num;
	u8 acb_flag;
	u8 gmode2;

	u8 config;
	u8 lun_chk;
	u8 scan_devices;
	u8 hostid_bit;

	u8 dcb_map[DC395x_MAX_SCSI_ID];
	struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];

	struct pci_dev *dev;

	u8 msg_len;

	struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
	struct ScsiReqBlk srb;

	struct NvRamType eeprom;	/* eeprom settings for this adapter */
};


/*---------------------------------------------------------------------------
                            Forward declarations
 ---------------------------------------------------------------------------*/
static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status);
static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status);
static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status);
static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status);
static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status);
static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status);
static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status);
static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status);
static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status);
static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status);
static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status);
static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status);
static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status);
static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 
		u16 *pscsi_status);
static void set_basic_config(struct AdapterCtlBlk *acb);
static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
		struct ScsiReqBlk *srb);
static void reset_scsi_bus(struct AdapterCtlBlk *acb);
static void data_io_transfer(struct AdapterCtlBlk *acb,
		struct ScsiReqBlk *srb, u16 io_dir);
static void disconnect(struct AdapterCtlBlk *acb);
static void reselect(struct AdapterCtlBlk *acb);
static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb);
static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
		struct ScsiReqBlk *srb);
static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb);
static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
		struct scsi_cmnd *cmd, u8 force);
static void scsi_reset_detect(struct AdapterCtlBlk *acb);
static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
		struct ScsiReqBlk *srb);
static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb);
static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb);
static void set_xfer_rate(struct AdapterCtlBlk *acb,
		struct DeviceCtlBlk *dcb);
static void waiting_timeout(unsigned long ptr);


/*---------------------------------------------------------------------------
                                 Static Data
 ---------------------------------------------------------------------------*/
static u16 current_sync_offset = 0;

static void *dc395x_scsi_phase0[] = {
	data_out_phase0,/* phase:0 */
	data_in_phase0,	/* phase:1 */
	command_phase0,	/* phase:2 */
	status_phase0,	/* phase:3 */
	nop0,		/* phase:4 PH_BUS_FREE .. initial phase */
	nop0,		/* phase:5 PH_BUS_FREE .. initial phase */
	msgout_phase0,	/* phase:6 */
	msgin_phase0,	/* phase:7 */
};

static void *dc395x_scsi_phase1[] = {
	data_out_phase1,/* phase:0 */
	data_in_phase1,	/* phase:1 */
	command_phase1,	/* phase:2 */
	status_phase1,	/* phase:3 */
	nop1,		/* phase:4 PH_BUS_FREE .. initial phase */
	nop1,		/* phase:5 PH_BUS_FREE .. initial phase */
	msgout_phase1,	/* phase:6 */
	msgin_phase1,	/* phase:7 */
};

/*
 *Fast20:	000	 50ns, 20.0 MHz
 *		001	 75ns, 13.3 MHz
 *		010	100ns, 10.0 MHz
 *		011	125ns,  8.0 MHz
 *		100	150ns,  6.6 MHz
 *		101	175ns,  5.7 MHz
 *		110	200ns,  5.0 MHz
 *		111	250ns,  4.0 MHz
 *
 *Fast40(LVDS):	000	 25ns, 40.0 MHz
 *		001	 50ns, 20.0 MHz
 *		010	 75ns, 13.3 MHz
 *		011	100ns, 10.0 MHz
 *		100	125ns,  8.0 MHz
 *		101	150ns,  6.6 MHz
 *		110	175ns,  5.7 MHz
 *		111	200ns,  5.0 MHz
 */
/*static u8	clock_period[] = {12,19,25,31,37,44,50,62};*/

/* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };


/*---------------------------------------------------------------------------
                                Configuration
  ---------------------------------------------------------------------------*/
/*
 * Module/boot parameters currently effect *all* instances of the
 * card in the system.
 */

/*
 * Command line parameters are stored in a structure below.
 * These are the index's into the structure for the various
 * command line options.
 */
#define CFG_ADAPTER_ID		0
#define CFG_MAX_SPEED		1
#define CFG_DEV_MODE		2
#define CFG_ADAPTER_MODE	3
#define CFG_TAGS		4
#define CFG_RESET_DELAY		5

#define CFG_NUM			6	/* number of configuration items */


/*
 * Value used to indicate that a command line override
 * hasn't been used to modify the value.
 */
#define CFG_PARAM_UNSET -1


/*
 * Hold command line parameters.
 */
struct ParameterData {
	int value;		/* value of this setting */
	int min;		/* minimum value */
	int max;		/* maximum value */
	int def;		/* default value */
	int safe;		/* safe value */
};
static struct ParameterData __devinitdata cfg_data[] = {
	{ /* adapter id */
		CFG_PARAM_UNSET,
		0,
		15,
		7,
		7
	},
	{ /* max speed */
		CFG_PARAM_UNSET,
		  0,
		  7,
		  1,	/* 13.3Mhz */
		  4,	/*  6.7Hmz */
	},
	{ /* dev mode */
		CFG_PARAM_UNSET,
		0,
		0x3f,
		NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
			NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
			NTC_DO_SEND_START,
		NTC_DO_PARITY_CHK | NTC_DO_SEND_START
	},
	{ /* adapter mode */
		CFG_PARAM_UNSET,
		0,
		0x2f,
#ifdef CONFIG_SCSI_MULTI_LUN
			NAC_SCANLUN |
#endif
		NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
			/*| NAC_ACTIVE_NEG*/,
		NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
	},
	{ /* tags */
		CFG_PARAM_UNSET,
		0,
		5,
		3,	/* 16 tags (??) */
		2,
	},
	{ /* reset delay */
		CFG_PARAM_UNSET,
		0,
		180,
		1,	/* 1 second */
		10,	/* 10 seconds */
	}
};


/*
 * Safe settings. If set to zero the BIOS/default values with
 * command line overrides will be used. If set to 1 then safe and
 * slow settings will be used.
 */
static int use_safe_settings = 0;
module_param_named(safe, use_safe_settings, bool, 0);
MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");


module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");

module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");

module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
MODULE_PARM_DESC(dev_mode, "Device mode.");

module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
MODULE_PARM_DESC(adapter_mode, "Adapter mode.");

module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");

module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");


/**
 * set_safe_settings - if the use_safe_settings option is set then
 * set all values to the safe and slow values.
 **/
static void __devinit set_safe_settings(void)
{
	if (use_safe_settings)
	{
		int i;

		dprintkl(KERN_INFO, "Using safe settings.\n");
		for (i = 0; i < CFG_NUM; i++)
		{
			cfg_data[i].value = cfg_data[i].safe;
		}
	}
}


/**
 * fix_settings - reset any boot parameters which are out of range
 * back to the default values.
 **/
static void __devinit fix_settings(void)
{
	int i;

	dprintkdbg(DBG_1,
		"setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
		"AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
		cfg_data[CFG_ADAPTER_ID].value,
		cfg_data[CFG_MAX_SPEED].value,
		cfg_data[CFG_DEV_MODE].value,
		cfg_data[CFG_ADAPTER_MODE].value,
		cfg_data[CFG_TAGS].value,
		cfg_data[CFG_RESET_DELAY].value);
	for (i = 0; i < CFG_NUM; i++)
	{
		if (cfg_data[i].value < cfg_data[i].min
		    || cfg_data[i].value > cfg_data[i].max)
			cfg_data[i].value = cfg_data[i].def;
	}
}



/*
 * Mapping from the eeprom delay index value (index into this array)
 * to the number of actual seconds that the delay should be for.
 */
static char __devinitdata eeprom_index_to_delay_map[] = 
	{ 1, 3, 5, 10, 16, 30, 60, 120 };


/**
 * eeprom_index_to_delay - Take the eeprom delay setting and convert it
 * into a number of seconds.
 *
 * @eeprom: The eeprom structure in which we find the delay index to map.
 **/
static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom)
{
	eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
}


/**
 * delay_to_eeprom_index - Take a delay in seconds and return the
 * closest eeprom index which will delay for at least that amount of
 * seconds.
 *
 * @delay: The delay, in seconds, to find the eeprom index for.
 **/
static int __devinit delay_to_eeprom_index(int delay)
{
	u8 idx = 0;
	while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
		idx++;
	return idx;
}


/**
 * eeprom_override - Override the eeprom settings, in the provided
 * eeprom structure, with values that have been set on the command
 * line.
 *
 * @eeprom: The eeprom data to override with command line options.
 **/
static void __devinit eeprom_override(struct NvRamType *eeprom)
{
	u8 id;

	/* Adapter Settings */
	if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
		eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;

	if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
		eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;

	if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
		eeprom->delay_time = delay_to_eeprom_index(
					cfg_data[CFG_RESET_DELAY].value);

	if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
		eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;

	/* Device Settings */
	for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
		if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
			eeprom->target[id].cfg0 =
				(u8)cfg_data[CFG_DEV_MODE].value;

		if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
			eeprom->target[id].period =
				(u8)cfg_data[CFG_MAX_SPEED].value;

	}
}


/*---------------------------------------------------------------------------
 ---------------------------------------------------------------------------*/

static unsigned int list_size(struct list_head *head)
{
	unsigned int count = 0;
	struct list_head *pos;
	list_for_each(pos, head)
		count++;
	return count;
}


static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
		struct DeviceCtlBlk *pos)
{
	int use_next = 0;
	struct DeviceCtlBlk* next = NULL;
	struct DeviceCtlBlk* i;

	if (list_empty(head))
		return NULL;

	/* find supplied dcb and then select the next one */
	list_for_each_entry(i, head, list)
		if (use_next) {
			next = i;
			break;
		} else if (i == pos) {
			use_next = 1;
		}
	/* if no next one take the head one (ie, wraparound) */
	if (!next)
        	list_for_each_entry(i, head, list) {
        		next = i;
        		break;
        	}

	return next;
}


static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
{
	if (srb->tag_number < 255) {
		dcb->tag_mask &= ~(1 << srb->tag_number);	/* free tag mask */
		srb->tag_number = 255;
	}
}


/* Find cmd in SRB list */
static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
		struct list_head *head)
{
	struct ScsiReqBlk *i;
	list_for_each_entry(i, head, list)
		if (i->cmd == cmd)
			return i;
	return NULL;
}


static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
{
	struct list_head *head = &acb->srb_free_list;
	struct ScsiReqBlk *srb = NULL;

	if (!list_empty(head)) {
		srb = list_entry(head->next, struct ScsiReqBlk, list);
		list_del(head->next);
		dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
	}
	return srb;
}


static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
	dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
	list_add_tail(&srb->list, &acb->srb_free_list);
}


static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb)
{
	dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n",
		srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
	list_add(&srb->list, &dcb->srb_waiting_list);
}


static void srb_waiting_append(struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb)
{
	dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n",
		 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
	list_add_tail(&srb->list, &dcb->srb_waiting_list);
}


static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
{
	dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n",
		srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
	list_add_tail(&srb->list, &dcb->srb_going_list);
}


static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
{
	struct ScsiReqBlk *i;
	struct ScsiReqBlk *tmp;
	dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n",
		srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);

	list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list)
		if (i == srb) {
			list_del(&srb->list);
			break;
		}
}


static void srb_waiting_remove(struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb)
{
	struct ScsiReqBlk *i;
	struct ScsiReqBlk *tmp;
	dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n",
		srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);

	list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list)
		if (i == srb) {
			list_del(&srb->list);
			break;
		}
}


static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb)
{
	dprintkdbg(DBG_0,
		"srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n",
		srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
	list_move(&srb->list, &dcb->srb_waiting_list);
}


static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb)
{
	dprintkdbg(DBG_0,
		"srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n",
		srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
	list_move(&srb->list, &dcb->srb_going_list);
}


/* Sets the timer to wake us up */
static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
{
	if (timer_pending(&acb->waiting_timer))
		return;
	init_timer(&acb->waiting_timer);
	acb->waiting_timer.function = waiting_timeout;
	acb->waiting_timer.data = (unsigned long) acb;
	if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2))
		acb->waiting_timer.expires =
		    acb->scsi_host->last_reset - HZ / 2 + 1;
	else
		acb->waiting_timer.expires = jiffies + to + 1;
	add_timer(&acb->waiting_timer);
}


/* Send the next command from the waiting list to the bus */
static void waiting_process_next(struct AdapterCtlBlk *acb)
{
	struct DeviceCtlBlk *start = NULL;
	struct DeviceCtlBlk *pos;
	struct DeviceCtlBlk *dcb;
	struct ScsiReqBlk *srb;
	struct list_head *dcb_list_head = &acb->dcb_list;

	if (acb->active_dcb
	    || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
		return;

	if (timer_pending(&acb->waiting_timer))
		del_timer(&acb->waiting_timer);

	if (list_empty(dcb_list_head))
		return;

	/*
	 * Find the starting dcb. Need to find it again in the list
	 * since the list may have changed since we set the ptr to it
	 */
	list_for_each_entry(dcb, dcb_list_head, list)
		if (dcb == acb->dcb_run_robin) {
			start = dcb;
			break;
		}
	if (!start) {
		/* This can happen! */
		start = list_entry(dcb_list_head->next, typeof(*start), list);
		acb->dcb_run_robin = start;
	}


	/*
	 * Loop over the dcb, but we start somewhere (potentially) in
	 * the middle of the loop so we need to manully do this.
	 */
	pos = start;
	do {
		struct list_head *waiting_list_head = &pos->srb_waiting_list;

		/* Make sure, the next another device gets scheduled ... */
		acb->dcb_run_robin = dcb_get_next(dcb_list_head,
						  acb->dcb_run_robin);

		if (list_empty(waiting_list_head) ||
		    pos->max_command <= list_size(&pos->srb_going_list)) {
			/* move to next dcb */
			pos = dcb_get_next(dcb_list_head, pos);
		} else {
			srb = list_entry(waiting_list_head->next,
					 struct ScsiReqBlk, list);

			/* Try to send to the bus */
			if (!start_scsi(acb, pos, srb))
				srb_waiting_to_going_move(pos, srb);
			else
				waiting_set_timer(acb, HZ/50);
			break;
		}
	} while (pos != start);
}


/* Wake up waiting queue */
static void waiting_timeout(unsigned long ptr)
{
	unsigned long flags;
	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
	dprintkdbg(DBG_1,
		"waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
	DC395x_LOCK_IO(acb->scsi_host, flags);
	waiting_process_next(acb);
	DC395x_UNLOCK_IO(acb->scsi_host, flags);
}


/* Get the DCB for a given ID/LUN combination */
static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
{
	return acb->children[id][lun];
}


/* Send SCSI Request Block (srb) to adapter (acb) */
static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
	struct DeviceCtlBlk *dcb = srb->dcb;

	if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
	    acb->active_dcb ||
	    (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
		srb_waiting_append(dcb, srb);
		waiting_process_next(acb);
		return;
	}

	if (!start_scsi(acb, dcb, srb))
		srb_going_append(dcb, srb);
	else {
		srb_waiting_insert(dcb, srb);
		waiting_set_timer(acb, HZ / 50);
	}
}

/* Prepare SRB for being sent to Device DCB w/ command *cmd */
static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb)
{
	int nseg;
	enum dma_data_direction dir = cmd->sc_data_direction;
	dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n",
		cmd->pid, dcb->target_id, dcb->target_lun);

	srb->dcb = dcb;
	srb->cmd = cmd;
	srb->sg_count = 0;
	srb->total_xfer_length = 0;
	srb->sg_bus_addr = 0;
	srb->sg_index = 0;
	srb->adapter_status = 0;
	srb->target_status = 0;
	srb->msg_count = 0;
	srb->status = 0;
	srb->flag = 0;
	srb->state = 0;
	srb->retry_count = 0;
	srb->tag_number = TAG_NONE;
	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
	srb->end_message = 0;

	nseg = scsi_dma_map(cmd);
	BUG_ON(nseg < 0);

	if (dir == PCI_DMA_NONE || !nseg) {
		dprintkdbg(DBG_0,
			"build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
			   cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
			   srb->segment_x[0].address);
	} else {
		int i;
		u32 reqlen = scsi_bufflen(cmd);
		struct scatterlist *sg;
		struct SGentry *sgp = srb->segment_x;

		srb->sg_count = nseg;

		dprintkdbg(DBG_0,
			   "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
			   reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
			   srb->sg_count);

		scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
			u32 busaddr = (u32)sg_dma_address(sg);
			u32 seglen = (u32)sg->length;
			sgp[i].address = busaddr;
			sgp[i].length = seglen;
			srb->total_xfer_length += seglen;
		}
		sgp += srb->sg_count - 1;

		/*
		 * adjust last page if too big as it is allocated
		 * on even page boundaries
		 */
		if (srb->total_xfer_length > reqlen) {
			sgp->length -= (srb->total_xfer_length - reqlen);
			srb->total_xfer_length = reqlen;
		}

		/* Fixup for WIDE padding - make sure length is even */
		if (dcb->sync_period & WIDE_SYNC &&
		    srb->total_xfer_length % 2) {
			srb->total_xfer_length++;
			sgp->length++;
		}

		srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
						srb->segment_x,
				            	SEGMENTX_LEN,
				            	PCI_DMA_TODEVICE);

		dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
			srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
	}

	srb->request_length = srb->total_xfer_length;
}


/**
 * dc395x_queue_command - queue scsi command passed from the mid
 * layer, invoke 'done' on completion
 *
 * @cmd: pointer to scsi command object
 * @done: function pointer to be invoked on completion
 *
 * Returns 1 if the adapter (host) is busy, else returns 0. One
 * reason for an adapter to be busy is that the number
 * of outstanding queued commands is already equal to
 * struct Scsi_Host::can_queue .
 *
 * Required: if struct Scsi_Host::can_queue is ever non-zero
 *           then this function is required.
 *
 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
 *        and is expected to be held on return.
 *
 **/
static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
{
	struct DeviceCtlBlk *dcb;
	struct ScsiReqBlk *srb;
	struct AdapterCtlBlk *acb =
	    (struct AdapterCtlBlk *)cmd->device->host->hostdata;
	dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n",
		cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);

	/* Assume BAD_TARGET; will be cleared later */
	cmd->result = DID_BAD_TARGET << 16;

	/* ignore invalid targets */
	if (cmd->device->id >= acb->scsi_host->max_id ||
	    cmd->device->lun >= acb->scsi_host->max_lun ||
	    cmd->device->lun >31) {
		goto complete;
	}

	/* does the specified lun on the specified device exist */
	if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
		dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
			cmd->device->id, cmd->device->lun);
		goto complete;
	}

	/* do we have a DCB for the device */
	dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
	if (!dcb) {
		/* should never happen */
		dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
			cmd->device->id, cmd->device->lun);
		goto complete;
	}

	/* set callback and clear result in the command */
	cmd->scsi_done = done;
	cmd->result = 0;

	srb = srb_get_free(acb);
	if (!srb)
	{
		/*
		 * Return 1 since we are unable to queue this command at this
		 * point in time.
		 */
		dprintkdbg(DBG_0, "queue_command: No free srb's\n");
		return 1;
	}

	build_srb(cmd, dcb, srb);

	if (!list_empty(&dcb->srb_waiting_list)) {
		/* append to waiting queue */
		srb_waiting_append(dcb, srb);
		waiting_process_next(acb);
	} else {
		/* process immediately */
		send_srb(acb, srb);
	}
	dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->pid);
	return 0;

complete:
	/*
	 * Complete the command immediatey, and then return 0 to
	 * indicate that we have handled the command. This is usually
	 * done when the commad is for things like non existent
	 * devices.
	 */
	done(cmd);
	return 0;
}


/*
 * Return the disk geometry for the given SCSI device.
 */
static int dc395x_bios_param(struct scsi_device *sdev,
		struct block_device *bdev, sector_t capacity, int *info)
{
#ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
	int heads, sectors, cylinders;
	struct AdapterCtlBlk *acb;
	int size = capacity;

	dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
	acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
	heads = 64;
	sectors = 32;
	cylinders = size / (heads * sectors);

	if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
		heads = 255;
		sectors = 63;
		cylinders = size / (heads * sectors);
	}
	geom[0] = heads;
	geom[1] = sectors;
	geom[2] = cylinders;
	return 0;
#else
	return scsicam_bios_param(bdev, capacity, info);
#endif
}


static void dump_register_info(struct AdapterCtlBlk *acb,
		struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
{
	u16 pstat;
	struct pci_dev *dev = acb->dev;
	pci_read_config_word(dev, PCI_STATUS, &pstat);
	if (!dcb)
		dcb = acb->active_dcb;
	if (!srb && dcb)
		srb = dcb->active_srb;
	if (srb) {
		if (!srb->cmd)
			dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
				srb, srb->cmd);
		else
			dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) "
				 "cmnd=0x%02x <%02i-%i>\n",
			    	srb, srb->cmd, srb->cmd->pid,
				srb->cmd->cmnd[0], srb->cmd->device->id,
			       	srb->cmd->device->lun);
		printk("  sglist=%p cnt=%i idx=%i len=%zu\n",
		       srb->segment_x, srb->sg_count, srb->sg_index,
		       srb->total_xfer_length);
		printk("  state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
		       srb->state, srb->status, srb->scsi_phase,
		       (acb->active_dcb) ? "" : "not");
	}
	dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
		"signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
		"rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
		"config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
		DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
		DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
		DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
		DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
		DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
		DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
		DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
		DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
		DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
		DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
		DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
		DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
		DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
	dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
		"irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
		"ctctr=0x%08x addr=0x%08x:0x%08x}\n",
		DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
		DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
		DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
		DC395x_read8(acb, TRM_S1040_DMA_STATUS),
		DC395x_read8(acb, TRM_S1040_DMA_INTEN),
		DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
		DC395x_read32(acb, TRM_S1040_DMA_XCNT),
		DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
		DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
		DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
	dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
		"pci{status=0x%04x}\n",
		DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
		DC395x_read8(acb, TRM_S1040_GEN_STATUS),
		DC395x_read8(acb, TRM_S1040_GEN_TIMER),
		pstat);
}


static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
{
#if debug_enabled(DBG_FIFO)
	u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
	u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
	if (!(fifocnt & 0x40))
		dprintkdbg(DBG_FIFO,
			"clear_fifo: (%i bytes) on phase %02x in %s\n",
			fifocnt & 0x3f, lines, txt);
#endif
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
}


static void reset_dev_param(struct AdapterCtlBlk *acb)
{
	struct DeviceCtlBlk *dcb;
	struct NvRamType *eeprom = &acb->eeprom;
	dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);

	list_for_each_entry(dcb, &acb->dcb_list, list) {
		u8 period_index;

		dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
		dcb->sync_period = 0;
		dcb->sync_offset = 0;

		dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
		period_index = eeprom->target[dcb->target_id].period & 0x07;
		dcb->min_nego_period = clock_period[period_index];
		if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
		    || !(acb->config & HCC_WIDE_CARD))
			dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
	}
}


/*
 * perform a hard reset on the SCSI bus
 * @cmd - some command for this host (for fetching hooks)
 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
 */
static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
{
	struct AdapterCtlBlk *acb =
		(struct AdapterCtlBlk *)cmd->device->host->hostdata;
	dprintkl(KERN_INFO,
		"eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n",
		cmd->pid, cmd->device->id, cmd->device->lun, cmd);

	if (timer_pending(&acb->waiting_timer))
		del_timer(&acb->waiting_timer);

	/*
	 * disable interrupt    
	 */
	DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
	DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);

	reset_scsi_bus(acb);
	udelay(500);

	/* We may be in serious trouble. Wait some seconds */
	acb->scsi_host->last_reset =
	    jiffies + 3 * HZ / 2 +
	    HZ * acb->eeprom.delay_time;

	/*
	 * re-enable interrupt      
	 */
	/* Clear SCSI FIFO          */
	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
	clear_fifo(acb, "eh_bus_reset");
	/* Delete pending IRQ */
	DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
	set_basic_config(acb);

	reset_dev_param(acb);
	doing_srb_done(acb, DID_RESET, cmd, 0);
	acb->active_dcb = NULL;
	acb->acb_flag = 0;	/* RESET_DETECT, RESET_DONE ,RESET_DEV */
	waiting_process_next(acb);

	return SUCCESS;
}

static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
{
	int rc;

	spin_lock_irq(cmd->device->host->host_lock);
	rc = __dc395x_eh_bus_reset(cmd);
	spin_unlock_irq(cmd->device->host->host_lock);

	return rc;
}

/*
 * abort an errant SCSI command
 * @cmd - command to be aborted
 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
 */
static int dc395x_eh_abort(struct scsi_cmnd *cmd)
{
	/*
	 * Look into our command queues: If it has not been sent already,
	 * we remove it and return success. Otherwise fail.
	 */
	struct AdapterCtlBlk *acb =
	    (struct AdapterCtlBlk *)cmd->device->host->hostdata;
	struct DeviceCtlBlk *dcb;
	struct ScsiReqBlk *srb;
	dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n",
		cmd->pid, cmd->device->id, cmd->device->lun, cmd);

	dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
	if (!dcb) {
		dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
		return FAILED;
	}

	srb = find_cmd(cmd, &dcb->srb_waiting_list);
	if (srb) {
		srb_waiting_remove(dcb, srb);
		pci_unmap_srb_sense(acb, srb);
		pci_unmap_srb(acb, srb);
		free_tag(dcb, srb);
		srb_free_insert(acb, srb);
		dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
		cmd->result = DID_ABORT << 16;
		return SUCCESS;
	}
	srb = find_cmd(cmd, &dcb->srb_going_list);
	if (srb) {
		dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
		/* XXX: Should abort the command here */
	} else {
		dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
	}
	return FAILED;
}


/* SDTR */
static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb)
{
	u8 *ptr = srb->msgout_buf + srb->msg_count;
	if (srb->msg_count > 1) {
		dprintkl(KERN_INFO,
			"build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
			srb->msg_count, srb->msgout_buf[0],
			srb->msgout_buf[1]);
		return;
	}
	if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
		dcb->sync_offset = 0;
		dcb->min_nego_period = 200 >> 2;
	} else if (dcb->sync_offset == 0)
		dcb->sync_offset = SYNC_NEGO_OFFSET;

	*ptr++ = MSG_EXTENDED;	/* (01h) */
	*ptr++ = 3;		/* length */
	*ptr++ = EXTENDED_SDTR;	/* (01h) */
	*ptr++ = dcb->min_nego_period;	/* Transfer period (in 4ns) */
	*ptr++ = dcb->sync_offset;	/* Transfer period (max. REQ/ACK dist) */
	srb->msg_count += 5;
	srb->state |= SRB_DO_SYNC_NEGO;
}


/* WDTR */
static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb)
{
	u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
		   (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
	u8 *ptr = srb->msgout_buf + srb->msg_count;
	if (srb->msg_count > 1) {
		dprintkl(KERN_INFO,
			"build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
			srb->msg_count, srb->msgout_buf[0],
			srb->msgout_buf[1]);
		return;
	}
	*ptr++ = MSG_EXTENDED;	/* (01h) */
	*ptr++ = 2;		/* length */
	*ptr++ = EXTENDED_WDTR;	/* (03h) */
	*ptr++ = wide;
	srb->msg_count += 4;
	srb->state |= SRB_DO_WIDE_NEGO;
}


#if 0
/* Timer to work around chip flaw: When selecting and the bus is 
 * busy, we sometimes miss a Selection timeout IRQ */
void selection_timeout_missed(unsigned long ptr);
/* Sets the timer to wake us up */
static void selto_timer(struct AdapterCtlBlk *acb)
{
	if (timer_pending(&acb->selto_timer))
		return;
	acb->selto_timer.function = selection_timeout_missed;
	acb->selto_timer.data = (unsigned long) acb;
	if (time_before
	    (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2))
		acb->selto_timer.expires =
		    acb->scsi_host->last_reset + HZ / 2 + 1;
	else
		acb->selto_timer.expires = jiffies + HZ + 1;
	add_timer(&acb->selto_timer);
}


void selection_timeout_missed(unsigned long ptr)
{
	unsigned long flags;
	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
	struct ScsiReqBlk *srb;
	dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
	if (!acb->active_dcb || !acb->active_dcb->active_srb) {
		dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
		return;
	}
	DC395x_LOCK_IO(acb->scsi_host, flags);
	srb = acb->active_dcb->active_srb;
	disconnect(acb);
	DC395x_UNLOCK_IO(acb->scsi_host, flags);
}
#endif


static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
		struct ScsiReqBlk* srb)
{
	u16 s_stat2, return_code;
	u8 s_stat, scsicommand, i, identify_message;
	u8 *ptr;
	dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n",
		srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);

	srb->tag_number = TAG_NONE;	/* acb->tag_max_num: had error read in eeprom */

	s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
	s_stat2 = 0;
	s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
#if 1
	if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
		dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n",
			srb->cmd->pid, s_stat, s_stat2);
		/*
		 * Try anyway?
		 *
		 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
		 * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed!
		 * (This is likely to be a bug in the hardware. Obviously, most people
		 *  only have one initiator per SCSI bus.)
		 * Instead let this fail and have the timer make sure the command is 
		 * tried again after a short time
		 */
		/*selto_timer (acb); */
		return 1;
	}
#endif
	if (acb->active_dcb) {
		dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a"
			"command while another command (pid#%li) is active.",
			srb->cmd->pid,
			acb->active_dcb->active_srb ?
			    acb->active_dcb->active_srb->cmd->pid : 0);
		return 1;
	}
	if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
		dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n",
			srb->cmd->pid);
		return 1;
	}
	/* Allow starting of SCSI commands half a second before we allow the mid-level
	 * to queue them again after a reset */
	if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) {
		dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
		return 1;
	}

	/* Flush FIFO */
	clear_fifo(acb, "start_scsi");
	DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
	DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
	DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */

	identify_message = dcb->identify_msg;
	/*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
	/* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
	if (srb->flag & AUTO_REQSENSE)
		identify_message &= 0xBF;

	if (((srb->cmd->cmnd[0] == INQUIRY)
	     || (srb->cmd->cmnd[0] == REQUEST_SENSE)
	     || (srb->flag & AUTO_REQSENSE))
	    && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
		 && !(dcb->sync_mode & WIDE_NEGO_DONE))
		|| ((dcb->sync_mode & SYNC_NEGO_ENABLE)
		    && !(dcb->sync_mode & SYNC_NEGO_DONE)))
	    && (dcb->target_lun == 0)) {
		srb->msgout_buf[0] = identify_message;
		srb->msg_count = 1;
		scsicommand = SCMD_SEL_ATNSTOP;
		srb->state = SRB_MSGOUT;
#ifndef SYNC_FIRST
		if (dcb->sync_mode & WIDE_NEGO_ENABLE
		    && dcb->inquiry7 & SCSI_INQ_WBUS16) {
			build_wdtr(acb, dcb, srb);
			goto no_cmd;
		}
#endif
		if (dcb->sync_mode & SYNC_NEGO_ENABLE
		    && dcb->inquiry7 & SCSI_INQ_SYNC) {
			build_sdtr(acb, dcb, srb);
			goto no_cmd;
		}
		if (dcb->sync_mode & WIDE_NEGO_ENABLE
		    && dcb->inquiry7 & SCSI_INQ_WBUS16) {
			build_wdtr(acb, dcb, srb);
			goto no_cmd;
		}
		srb->msg_count = 0;
	}
	/* Send identify message */
	DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);

	scsicommand = SCMD_SEL_ATN;
	srb->state = SRB_START_;
#ifndef DC395x_NO_TAGQ
	if ((dcb->sync_mode & EN_TAG_QUEUEING)
	    && (identify_message & 0xC0)) {
		/* Send Tag message */
		u32 tag_mask = 1;
		u8 tag_number = 0;
		while (tag_mask & dcb->tag_mask
		       && tag_number <= dcb->max_command) {
			tag_mask = tag_mask << 1;
			tag_number++;
		}
		if (tag_number >= dcb->max_command) {
			dprintkl(KERN_WARNING, "start_scsi: (pid#%li) "
				"Out of tags target=<%02i-%i>)\n",
				srb->cmd->pid, srb->cmd->device->id,
				srb->cmd->device->lun);
			srb->state = SRB_READY;
			DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
				       DO_HWRESELECT);
			return 1;
		}
		/* Send Tag id */
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
		dcb->tag_mask |= tag_mask;
		srb->tag_number = tag_number;
		scsicommand = SCMD_SEL_ATN3;
		srb->state = SRB_START_;
	}
#endif
/*polling:*/
	/* Send CDB ..command block ......... */
	dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n",
		srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
		srb->cmd->cmnd[0], srb->tag_number);
	if (srb->flag & AUTO_REQSENSE) {
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
			      sizeof(srb->cmd->sense_buffer));
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
	} else {
		ptr = (u8 *)srb->cmd->cmnd;
		for (i = 0; i < srb->cmd->cmd_len; i++)
			DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
	}
      no_cmd:
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
		       DO_HWRESELECT | DO_DATALATCH);
	if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
		/* 
		 * If start_scsi return 1:
		 * we caught an interrupt (must be reset or reselection ... )
		 * : Let's process it first!
		 */
		dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n",
			srb->cmd->pid, dcb->target_id, dcb->target_lun);
		srb->state = SRB_READY;
		free_tag(dcb, srb);
		srb->msg_count = 0;
		return_code = 1;
		/* This IRQ should NOT get lost, as we did not acknowledge it */
	} else {
		/* 
		 * If start_scsi returns 0:
		 * we know that the SCSI processor is free
		 */
		srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
		dcb->active_srb = srb;
		acb->active_dcb = dcb;
		return_code = 0;
		/* it's important for atn stop */
		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
			       DO_DATALATCH | DO_HWRESELECT);
		/* SCSI command */
		DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
	}
	return return_code;
}


#define DC395x_ENABLE_MSGOUT \
 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
 srb->state |= SRB_MSGOUT


/* abort command */
static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
		struct ScsiReqBlk *srb)
{
	srb->msgout_buf[0] = ABORT;
	srb->msg_count = 1;
	DC395x_ENABLE_MSGOUT;
	srb->state &= ~SRB_MSGIN;
	srb->state |= SRB_MSGOUT;
}


/**
 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
 *                           have been triggered for this card.
 *
 * @acb:	 a pointer to the adpter control block
 * @scsi_status: the status return when we checked the card
 **/
static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
		u16 scsi_status)
{
	struct DeviceCtlBlk *dcb;
	struct ScsiReqBlk *srb;
	u16 phase;
	u8 scsi_intstatus;
	unsigned long flags;
	void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, 
			      u16 *);

	DC395x_LOCK_IO(acb->scsi_host, flags);

	/* This acknowledges the IRQ */
	scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
	if ((scsi_status & 0x2007) == 0x2002)
		dprintkl(KERN_DEBUG,
			"COP after COP completed? %04x\n", scsi_status);
	if (debug_enabled(DBG_KG)) {
		if (scsi_intstatus & INT_SELTIMEOUT)
			dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
	}
	/*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */

	if (timer_pending(&acb->selto_timer))
		del_timer(&acb->selto_timer);

	if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
		disconnect(acb);	/* bus free interrupt  */
		goto out_unlock;
	}
	if (scsi_intstatus & INT_RESELECTED) {
		reselect(acb);
		goto out_unlock;
	}
	if (scsi_intstatus & INT_SELECT) {
		dprintkl(KERN_INFO, "Host does not support target mode!\n");
		goto out_unlock;
	}
	if (scsi_intstatus & INT_SCSIRESET) {
		scsi_reset_detect(acb);
		goto out_unlock;
	}
	if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
		dcb = acb->active_dcb;
		if (!dcb) {
			dprintkl(KERN_DEBUG,
				"Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
				scsi_status, scsi_intstatus);
			goto out_unlock;
		}
		srb = dcb->active_srb;
		if (dcb->flag & ABORT_DEV_) {
			dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
			enable_msgout_abort(acb, srb);
		}

		/* software sequential machine */
		phase = (u16)srb->scsi_phase;

		/* 
		 * 62037 or 62137
		 * call  dc395x_scsi_phase0[]... "phase entry"
		 * handle every phase before start transfer
		 */
		/* data_out_phase0,	phase:0 */
		/* data_in_phase0,	phase:1 */
		/* command_phase0,	phase:2 */
		/* status_phase0,	phase:3 */
		/* nop0,		phase:4 PH_BUS_FREE .. initial phase */
		/* nop0,		phase:5 PH_BUS_FREE .. initial phase */
		/* msgout_phase0,	phase:6 */
		/* msgin_phase0,	phase:7 */
		dc395x_statev = dc395x_scsi_phase0[phase];
		dc395x_statev(acb, srb, &scsi_status);

		/* 
		 * if there were any exception occured scsi_status
		 * will be modify to bus free phase new scsi_status
		 * transfer out from ... previous dc395x_statev
		 */
		srb->scsi_phase = scsi_status & PHASEMASK;
		phase = (u16)scsi_status & PHASEMASK;

		/* 
		 * call  dc395x_scsi_phase1[]... "phase entry" handle
		 * every phase to do transfer
		 */
		/* data_out_phase1,	phase:0 */
		/* data_in_phase1,	phase:1 */
		/* command_phase1,	phase:2 */
		/* status_phase1,	phase:3 */
		/* nop1,		phase:4 PH_BUS_FREE .. initial phase */
		/* nop1,		phase:5 PH_BUS_FREE .. initial phase */
		/* msgout_phase1,	phase:6 */
		/* msgin_phase1,	phase:7 */
		dc395x_statev = dc395x_scsi_phase1[phase];
		dc395x_statev(acb, srb, &scsi_status);
	}
      out_unlock:
	DC395x_UNLOCK_IO(acb->scsi_host, flags);
}


static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
{
	struct AdapterCtlBlk *acb = dev_id;
	u16 scsi_status;
	u8 dma_status;
	irqreturn_t handled = IRQ_NONE;

	/*
	 * Check for pending interupt
	 */
	scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
	dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
	if (scsi_status & SCSIINTERRUPT) {
		/* interupt pending - let's process it! */
		dc395x_handle_interrupt(acb, scsi_status);
		handled = IRQ_HANDLED;
	}
	else if (dma_status & 0x20) {
		/* Error from the DMA engine */
		dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
#if 0
		dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
		if (acb->active_dcb) {
			acb->active_dcb-> flag |= ABORT_DEV_;
			if (acb->active_dcb->active_srb)
				enable_msgout_abort(acb, acb->active_dcb->active_srb);
		}
		DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
#else
		dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
		acb = NULL;
#endif
		handled = IRQ_HANDLED;
	}

	return handled;
}


static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
	dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid);
	if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
		*pscsi_status = PH_BUS_FREE;	/*.. initial phase */

	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
	srb->state &= ~SRB_MSGOUT;
}


static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
	u16 i;
	u8 *ptr;
	dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid);

	clear_fifo(acb, "msgout_phase1");
	if (!(srb->state & SRB_MSGOUT)) {
		srb->state |= SRB_MSGOUT;
		dprintkl(KERN_DEBUG,
			"msgout_phase1: (pid#%li) Phase unexpected\n",
			srb->cmd->pid);	/* So what ? */
	}
	if (!srb->msg_count) {
		dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n",
			srb->cmd->pid);
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
		DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
		return;
	}
	ptr = (u8 *)srb->msgout_buf;
	for (i = 0; i < srb->msg_count; i++)
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
	srb->msg_count = 0;
	if (srb->msgout_buf[0] == MSG_ABORT)
		srb->state = SRB_ABORT_SENT;

	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
}


static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
	dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid);
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
}


static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
	struct DeviceCtlBlk *dcb;
	u8 *ptr;
	u16 i;
	dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid);

	clear_fifo(acb, "command_phase1");
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
	if (!(srb->flag & AUTO_REQSENSE)) {
		ptr = (u8 *)srb->cmd->cmnd;
		for (i = 0; i < srb->cmd->cmd_len; i++) {
			DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
			ptr++;
		}
	} else {
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
		dcb = acb->active_dcb;
		/* target id */
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
			      sizeof(srb->cmd->sense_buffer));
		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
	}
	srb->state |= SRB_COMMAND;
	/* it's important for atn stop */
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
	/* SCSI command */
	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
}


/*
 * Verify that the remaining space in the hw sg lists is the same as
 * the count of remaining bytes in srb->total_xfer_length
 */
static void sg_verify_length(struct ScsiReqBlk *srb)
{
	if (debug_enabled(DBG_SG)) {
		unsigned len = 0;
		unsigned idx = srb->sg_index;
		struct SGentry *psge = srb->segment_x + idx;
		for (; idx < srb->sg_count; psge++, idx++)
			len += psge->length;
		if (len != srb->total_xfer_length)
			dprintkdbg(DBG_SG,
			       "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
			       srb->total_xfer_length, len);
	}			       
}


/*
 * Compute the next Scatter Gather list index and adjust its length
 * and address if necessary
 */
static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
{
	u8 idx;
	u32 xferred = srb->total_xfer_length - left; /* bytes transfered */
	struct SGentry *psge = srb->segment_x + srb->sg_index;

	dprintkdbg(DBG_0,
		"sg_update_list: Transfered %i of %i bytes, %i remain\n",
		xferred, srb->total_xfer_length, left);
	if (xferred == 0) {
		/* nothing to update since we did not transfer any data */
		return;
	}

	sg_verify_length(srb);
	srb->total_xfer_length = left;	/* update remaining count */
	for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
		if (xferred >= psge->length) {
			/* Complete SG entries done */
			xferred -= psge->length;
		} else {
			/* Partial SG entry done */
			psge->length -= xferred;
			psge->address += xferred;
			srb->sg_index = idx;
			pci_dma_sync_single_for_device(srb->dcb->
					    acb->dev,
					    srb->sg_bus_addr,
					    SEGMENTX_LEN,
					    PCI_DMA_TODEVICE);
			break;
		}
		psge++;
	}
	sg_verify_length(srb);
}


/*
 * We have transfered a single byte (PIO mode?) and need to update
 * the count of bytes remaining (total_xfer_length) and update the sg
 * entry to either point to next byte in the current sg entry, or of
 * already at the end to point to the start of the next sg entry
 */
static void sg_subtract_one(struct ScsiReqBlk *srb)
{
	sg_update_list(srb, srb->total_xfer_length - 1);
}


/* 
 * cleanup_after_transfer
 * 
 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
 * KG: Currently called from  StatusPhase1 ()
 * Should probably also be called from other places
 * Best might be to call it in DataXXPhase0, if new phase will differ 
 */
static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
		struct ScsiReqBlk *srb)
{
	/*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
	if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) {	/* read */
		if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
			clear_fifo(acb, "cleanup/in");
		if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
			DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
	} else {		/* write */
		if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
			DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
		if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
			clear_fifo(acb, "cleanup/out");
	}
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
}


/*
 * Those no of bytes will be transfered w/ PIO through the SCSI FIFO
 * Seems to be needed for unknown reasons; could be a hardware bug :-(
 */
#define DC395x_LASTPIO 4


static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
	struct DeviceCtlBlk *dcb = srb->dcb;
	u16 scsi_status = *pscsi_status;
	u32 d_left_counter = 0;
	dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n",
		srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);

	/*
	 * KG: We need to drain the buffers before we draw any conclusions!
	 * This means telling the DMA to push the rest into SCSI, telling
	 * SCSI to push the rest to the bus.
	 * However, the device might have been the one to stop us (phase
	 * change), and the data in transit just needs to be accounted so
	 * it can be retransmitted.)
	 */
	/* 
	 * KG: Stop DMA engine pushing more data into the SCSI FIFO
	 * If we need more data, the DMA SG list will be freshly set up, anyway
	 */
	dprintkdbg(DBG_PIO, "data_out_phase0: "
		"DMA{fifocnt=0x%02x fifostat=0x%02x} "
		"SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
		DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
		DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
		DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
		DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
		srb->total_xfer_length);
	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);

	if (!(srb->state & SRB_XFERPAD)) {
		if (scsi_status & PARITYERROR)
			srb->status |= PARITY_ERROR;

		/*
		 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
		 * is the no of bytes it got from the DMA engine not the no it 
		 * transferred successfully to the device. (And the difference could
		 * be as much as the FIFO size, I guess ...)
		 */
		if (!(scsi_status & SCSIXFERDONE)) {
			/*
			 * when data transfer from DMA FIFO to SCSI FIFO
			 * if there was some data left in SCSI FIFO
			 */
			d_left_counter =
			    (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
				  0x1F);
			if (dcb->sync_period & WIDE_SYNC)
				d_left_counter <<= 1;

			dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
				"SCSI{fifocnt=0x%02x cnt=0x%08x} "
				"DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
				DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
				(dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
				DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
				DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
				DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
				DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
				DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
		}
		/*
		 * calculate all the residue data that not yet tranfered
		 * SCSI transfer counter + left in SCSI FIFO data
		 *
		 * .....TRM_S1040_SCSI_COUNTER (24bits)
		 * The counter always decrement by one for every SCSI byte transfer.
		 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
		 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
		 */
		if (srb->total_xfer_length > DC395x_LASTPIO)
			d_left_counter +=
			    DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);

		/* Is this a good idea? */
		/*clear_fifo(acb, "DOP1"); */
		/* KG: What is this supposed to be useful for? WIDE padding stuff? */
		if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
		    && scsi_bufflen(srb->cmd) % 2) {
			d_left_counter = 0;
			dprintkl(KERN_INFO,
				"data_out_phase0: Discard 1 byte (0x%02x)\n",
				scsi_status);
		}
		/*
		 * KG: Oops again. Same thinko as above: The SCSI might have been
		 * faster than the DMA engine, so that it ran out of data.
		 * In that case, we have to do just nothing! 
		 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
		 */
		/*
		 * KG: This is nonsense: We have been WRITING data to the bus
		 * If the SCSI engine has no bytes left, how should the DMA engine?
		 */
		if (d_left_counter == 0) {
			srb->total_xfer_length = 0;
		} else {
			/*
			 * if transfer not yet complete
			 * there were some data residue in SCSI FIFO or
			 * SCSI transfer counter not empty
			 */
			long oldxferred =
			    srb->total_xfer_length - d_left_counter;
			const int diff =
			    (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
			sg_update_list(srb, d_left_counter);
			/* KG: Most ugly hack! Apparently, this works around a chip bug */
			if ((srb->segment_x[srb->sg_index].length ==
			     diff && scsi_sg_count(srb->cmd))
			    || ((oldxferred & ~PAGE_MASK) ==
				(PAGE_SIZE - diff))
			    ) {
				dprintkl(KERN_INFO, "data_out_phase0: "
					"Work around chip bug (%i)?\n", diff);
				d_left_counter =
				    srb->total_xfer_length - diff;
				sg_update_list(srb, d_left_counter);
				/*srb->total_xfer_length -= diff; */
				/*srb->virt_addr += diff; */
				/*if (srb->cmd->use_sg) */
				/*      srb->sg_index++; */
			}
		}
	}
	if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
		cleanup_after_transfer(acb, srb);
	}
}


static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
	dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n",
		srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
	clear_fifo(acb, "data_out_phase1");
	/* do prepare before transfer when data out phase */
	data_io_transfer(acb, srb, XFERDATAOUT);
}

static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
	u16 scsi_status = *pscsi_status;

	dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n",
		srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);

	/*
	 * KG: DataIn is much more tricky than DataOut. When the device is finished
	 * and switches to another phase, the SCSI engine should be finished too.
	 * But: There might still be bytes left in its FIFO to be fetched by the DMA
	 * engine and transferred to memory.
	 * We should wait for the FIFOs to be emptied by that (is there any way to 
	 * enforce this?) and then stop the DMA engine, because it might think, that
	 * there are more bytes to follow. Yes, the device might disconnect prior to
	 * having all bytes transferred! 
	 * Also we should make sure that all data from the DMA engine buffer's really
	 * made its way to the system memory! Some documentation on this would not
	 * seem to be a bad idea, actually.
	 */
	if (!(srb->state & SRB_XFERPAD)) {
		u32 d_left_counter;
		unsigned int sc, fc;

		if (scsi_status & PARITYERROR) {
			dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) "
				"Parity Error\n", srb->cmd->pid);
			srb->status |= PARITY_ERROR;
		}
		/*
		 * KG: We should wait for the DMA FIFO to be empty ...
		 * but: it would be better to wait first for the SCSI FIFO and then the
		 * the DMA FIFO to become empty? How do we know, that the device not already
		 * sent data to the FIFO in a MsgIn phase, eg.?
		 */
		if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
#if 0
			int ctr = 6000000;
			dprintkl(KERN_DEBUG,
				"DIP0: Wait for DMA FIFO to flush ...\n");
			/*DC395x_write8  (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
			/*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
			/*DC395x_write8  (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
			while (!
			       (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
				0x80) && --ctr);
			if (ctr < 6000000 - 1)
				dprintkl(KERN_DEBUG
				       "DIP0: Had to wait for DMA ...\n");
			if (!ctr)
				dprintkl(KERN_ERR,
				       "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
			/*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
#endif
			dprintkdbg(DBG_KG, "data_in_phase0: "
				"DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
				DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
				DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
		}
		/* Now: Check remainig data: The SCSI counters should tell us ... */
		sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
		fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
		d_left_counter = sc + ((fc & 0x1f)
		       << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
			   0));
		dprintkdbg(DBG_KG, "data_in_phase0: "
			"SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
			"DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
			"Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
			fc,
			(srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
			sc,
			fc,
			DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
			DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
			srb->total_xfer_length, d_left_counter);
#if DC395x_LASTPIO
		/* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */
		if (d_left_counter
		    && srb->total_xfer_length <= DC395x_LASTPIO) {
			size_t left_io = srb->total_xfer_length;

			/*u32 addr = (srb->segment_x[srb->sg_index].address); */
			/*sg_update_list (srb, d_left_counter); */
			dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
				   "for remaining %i bytes:",
				fc & 0x1f,
				(srb->dcb->sync_period & WIDE_SYNC) ?
				    "words" : "bytes",
				srb->total_xfer_length);
			if (srb->dcb->sync_period & WIDE_SYNC)
				DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
					      CFG2_WIDEFIFO);
			while (left_io) {
				unsigned char *virt, *base = NULL;
				unsigned long flags = 0;
				size_t len = left_io;
				size_t offset = srb->request_length - left_io;

				local_irq_save(flags);
				/* Assumption: it's inside one page as it's at most 4 bytes and
				   I just assume it's on a 4-byte boundary */
				base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
							   srb->sg_count, &offset, &len);
				virt = base + offset;

				left_io -= len;

				while (len) {
					u8 byte;
					byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
					*virt++ = byte;

					if (debug_enabled(DBG_PIO))
						printk(" %02x", byte);

					d_left_counter--;
					sg_subtract_one(srb);

					len--;

					fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);

					if (fc == 0x40) {
						left_io = 0;
						break;
					}
				}

				WARN_ON((fc != 0x40) == !d_left_counter);

				if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
					/* Read the last byte ... */
					if (srb->total_xfer_length > 0) {
						u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);

						*virt++ = byte;
						srb->total_xfer_length--;
						if (debug_enabled(DBG_PIO))
							printk(" %02x", byte);
					}

					DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
				}

				scsi_kunmap_atomic_sg(base);
				local_irq_restore(flags);
			}
			/*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
			/*srb->total_xfer_length = 0; */
			if (debug_enabled(DBG_PIO))
				printk("\n");
		}
#endif				/* DC395x_LASTPIO */

#if 0
		/*
		 * KG: This was in DATAOUT. Does it also belong here?
		 * Nobody seems to know what counter and fifo_cnt count exactly ...
		 */
		if (!(scsi_status & SCSIXFERDONE)) {
			/*
			 * when data transfer from DMA FIFO to SCSI FIFO
			 * if there was some data left in SCSI FIFO
			 */
			d_left_counter =
			    (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
				  0x1F);
			if (srb->dcb->sync_period & WIDE_SYNC)
				d_left_counter <<= 1;
			/*
			 * if WIDE scsi SCSI FIFOCNT unit is word !!!
			 * so need to *= 2
			 * KG: Seems to be correct ...
			 */
		}
#endif
		/* KG: This should not be needed any more! */
		if (d_left_counter == 0
		    || (scsi_status & SCSIXFERCNT_2_ZERO)) {
#if 0
			int ctr = 6000000;
			u8 TempDMAstatus;
			do {
				TempDMAstatus =
				    DC395x_read8(acb, TRM_S1040_DMA_STATUS);
			} while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
			if (!ctr)
				dprintkl(KERN_ERR,
				       "Deadlock in DataInPhase0 waiting for DMA!!\n");
			srb->total_xfer_length = 0;
#endif
			srb->total_xfer_length = d_left_counter;
		} else {	/* phase changed */
			/*
			 * parsing the case:
			 * when a transfer not yet complete 
			 * but be disconnected by target
			 * if transfer not yet complete
			 * there were some data residue in SCSI FIFO or
			 * SCSI transfer counter not empty
			 */
			sg_update_list(srb, d_left_counter);
		}
	}
	/* KG: The target may decide to disconnect: Empty FIFO before! */
	if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
		cleanup_after_transfer(acb, srb);
	}
}


static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
	dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n",
		srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
	data_io_transfer(acb, srb, XFERDATAIN);
}


static void data_io_transfer(struct AdapterCtlBlk *acb, 
		struct ScsiReqBlk *srb, u16 io_dir)
{
	struct DeviceCtlBlk *dcb = srb->dcb;
	u8 bval;
	dprintkdbg(DBG_0,
		"data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
		srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
		((io_dir & DMACMD_DIR) ? 'r' : 'w'),
		srb->total_xfer_length, srb->sg_index, srb->sg_count);
	if (srb == acb->tmp_srb)
		dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
	if (srb->sg_index >= srb->sg_count) {
		/* can't happen? out of bounds error */
		return;
	}

	if (srb->total_xfer_length > DC395x_LASTPIO) {
		u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
		/*
		 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
		 * Maybe, even ABORTXFER would be appropriate
		 */
		if (dma_status & XFERPENDING) {
			dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
				"Expect trouble!\n");
			dump_register_info(acb, dcb, srb);
			DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
		}
		/* clear_fifo(acb, "IO"); */
		/* 
		 * load what physical address of Scatter/Gather list table
		 * want to be transfer
		 */
		srb->state |= SRB_DATA_XFER;
		DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
		if (scsi_sg_count(srb->cmd)) {	/* with S/G */
			io_dir |= DMACMD_SG;
			DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
				       srb->sg_bus_addr +
				       sizeof(struct SGentry) *
				       srb->sg_index);
			/* load how many bytes in the sg list table */
			DC395x_write32(acb, TRM_S1040_DMA_XCNT,
				       ((u32)(srb->sg_count -
					      srb->sg_index) << 3));
		} else {	/* without S/G */
			io_dir &= ~DMACMD_SG;
			DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
				       srb->segment_x[0].address);
			DC395x_write32(acb, TRM_S1040_DMA_XCNT,
				       srb->segment_x[0].length);
		}
		/* load total transfer length (24bits) max value 16Mbyte */
		DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
			       srb->total_xfer_length);
		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
		if (io_dir & DMACMD_DIR) {	/* read */
			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
				      SCMD_DMA_IN);
			DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
		} else {
			DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
				      SCMD_DMA_OUT);
		}

	}
#if DC395x_LASTPIO
	else if (srb->total_xfer_length > 0) {	/* The last four bytes: Do PIO */
		/* 
		 * load what physical address of Scatter/Gather list table
		 * want to be transfer
		 */
		srb->state |= SRB_DATA_XFER;
		/* load total transfer length (24bits) max value 16Mbyte */
		DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
			       srb->total_xfer_length);
		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
		if (io_dir & DMACMD_DIR) {	/* read */
			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
				      SCMD_FIFO_IN);
		} else {	/* write */
			int ln = srb->total_xfer_length;
			size_t left_io = srb->total_xfer_length;

			if (srb->dcb->sync_period & WIDE_SYNC)
				DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
				     CFG2_WIDEFIFO);

			while (left_io) {
				unsigned char *virt, *base = NULL;
				unsigned long flags = 0;
				size_t len = left_io;
				size_t offset = srb->request_length - left_io;

				local_irq_save(flags);
				/* Again, max 4 bytes */
				base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
							   srb->sg_count, &offset, &len);
				virt = base + offset;

				left_io -= len;

				while (len--) {
					if (debug_enabled(DBG_PIO))
						printk(" %02x", *virt);

					DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);

					sg_subtract_one(srb);
				}

				scsi_kunmap_atomic_sg(base);
				local_irq_restore(flags);
			}
			if (srb->dcb->sync_period & WIDE_SYNC) {
				if (ln % 2) {
					DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
					if (debug_enabled(DBG_PIO))
						printk(" |00");
				}
				DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
			}
			/*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
			if (debug_enabled(DBG_PIO))
				printk("\n");
			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
					  SCMD_FIFO_OUT);
		}
	}
#endif				/* DC395x_LASTPIO */
	else {		/* xfer pad */
		u8 data = 0, data2 = 0;
		if (srb->sg_count) {
			srb->adapter_status = H_OVER_UNDER_RUN;
			srb->status |= OVER_RUN;
		}
		/*
		 * KG: despite the fact that we are using 16 bits I/O ops
		 * the SCSI FIFO is only 8 bits according to the docs
		 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
		 */
		if (dcb->sync_period & WIDE_SYNC) {
			DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
			DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
				      CFG2_WIDEFIFO);
			if (io_dir & DMACMD_DIR) {
				data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
				data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
			} else {
				/* Danger, Robinson: If you find KGs
				 * scattered over the wide disk, the driver
				 * or chip is to blame :-( */
				DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
				DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
			}
			DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
		} else {
			DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
			/* Danger, Robinson: If you find a collection of Ks on your disk
			 * something broke :-( */
			if (io_dir & DMACMD_DIR)
				data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
			else
				DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
		}
		srb->state |= SRB_XFERPAD;
		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
		/* SCSI command */
		bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
		DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
	}
}


static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
	dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n",
		srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
	srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
	srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);	/* get message */
	srb->state = SRB_COMPLETED;
	*pscsi_status = PH_BUS_FREE;	/*.. initial phase */
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
}


static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
	dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n",
		srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
	srb->state = SRB_STATUS;
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
}


/* Check if the message is complete */
static inline u8 msgin_completed(u8 * msgbuf, u32 len)
{
	if (*msgbuf == EXTENDED_MESSAGE) {
		if (len < 2)
			return 0;
		if (len < msgbuf[1] + 2)
			return 0;
	} else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f)	/* two byte messages */
		if (len < 2)
			return 0;
	return 1;
}

/* reject_msg */
static inline void msgin_reject(struct AdapterCtlBlk *acb,
		struct ScsiReqBlk *srb)
{
	srb->msgout_buf[0] = MESSAGE_REJECT;
	srb->msg_count = 1;
	DC395x_ENABLE_MSGOUT;
	srb->state &= ~SRB_MSGIN;
	srb->state |= SRB_MSGOUT;
	dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
		srb->msgin_buf[0],
		srb->dcb->target_id, srb->dcb->target_lun);
}


static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
		struct DeviceCtlBlk *dcb, u8 tag)
{
	struct ScsiReqBlk *srb = NULL;
	struct ScsiReqBlk *i;
	dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n",
		   srb->cmd->pid, tag, srb);

	if (!(dcb->tag_mask & (1 << tag)))
		dprintkl(KERN_DEBUG,
			"msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
			dcb->tag_mask, tag);

	if (list_empty(&dcb->srb_going_list))
		goto mingx0;
	list_for_each_entry(i, &dcb->srb_going_list, list) {
		if (i->tag_number == tag) {
			srb = i;
			break;
		}
	}
	if (!srb)
		goto mingx0;

	dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n",
		srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun);
	if (dcb->flag & ABORT_DEV_) {
		/*srb->state = SRB_ABORT_SENT; */
		enable_msgout_abort(acb, srb);
	}

	if (!(srb->state & SRB_DISCONNECT))
		goto mingx0;

	memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
	srb->state |= dcb->active_srb->state;
	srb->state |= SRB_DATA_XFER;
	dcb->active_srb = srb;
	/* How can we make the DORS happy? */
	return srb;

      mingx0:
	srb = acb->tmp_srb;
	srb->state = SRB_UNEXPECT_RESEL;
	dcb->active_srb = srb;
	srb->msgout_buf[0] = MSG_ABORT_TAG;
	srb->msg_count = 1;
	DC395x_ENABLE_MSGOUT;
	dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
	return srb;
}


static inline void reprogram_regs(struct AdapterCtlBlk *acb,
		struct DeviceCtlBlk *dcb)
{
	DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
	DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
	set_xfer_rate(acb, dcb);
}


/* set async transfer mode */
static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
	struct DeviceCtlBlk *dcb = srb->dcb;
	dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
		dcb->target_id, dcb->target_lun);

	dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
	dcb->sync_mode |= SYNC_NEGO_DONE;
	/*dcb->sync_period &= 0; */
	dcb->sync_offset = 0;
	dcb->min_nego_period = 200 >> 2;	/* 200ns <=> 5 MHz */
	srb->state &= ~SRB_DO_SYNC_NEGO;
	reprogram_regs(acb, dcb);
	if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
	    && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
		build_wdtr(acb, dcb, srb);
		DC395x_ENABLE_MSGOUT;
		dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
	}
}


/* set sync transfer mode */
static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
	struct DeviceCtlBlk *dcb = srb->dcb;
	u8 bval;
	int fact;
	dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
		"(%02i.%01i MHz) Offset %i\n",
		dcb->target_id, srb->msgin_buf[3] << 2,
		(250 / srb->msgin_buf[3]),
		((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
		srb->msgin_buf[4]);

	if (srb->msgin_buf[4] > 15)
		srb->msgin_buf[4] = 15;
	if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
		dcb->sync_offset = 0;
	else if (dcb->sync_offset == 0)
		dcb->sync_offset = srb->msgin_buf[4];
	if (srb->msgin_buf[4] > dcb->sync_offset)
		srb->msgin_buf[4] = dcb->sync_offset;
	else
		dcb->sync_offset = srb->msgin_buf[4];
	bval = 0;
	while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
			    || dcb->min_nego_period >
			    clock_period[bval]))
		bval++;
	if (srb->msgin_buf[3] < clock_period[bval])
		dprintkl(KERN_INFO,
			"msgin_set_sync: Increase sync nego period to %ins\n",
			clock_period[bval] << 2);
	srb->msgin_buf[3] = clock_period[bval];
	dcb->sync_period &= 0xf0;
	dcb->sync_period |= ALT_SYNC | bval;
	dcb->min_nego_period = srb->msgin_buf[3];

	if (dcb->sync_period & WIDE_SYNC)
		fact = 500;
	else
		fact = 250;

	dprintkl(KERN_INFO,
		"Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
		dcb->target_id, (fact == 500) ? "Wide16" : "",
		dcb->min_nego_period << 2, dcb->sync_offset,
		(fact / dcb->min_nego_period),
		((fact % dcb->min_nego_period) * 10 +
		dcb->min_nego_period / 2) / dcb->min_nego_period);

	if (!(srb->state & SRB_DO_SYNC_NEGO)) {
		/* Reply with corrected SDTR Message */
		dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
			srb->msgin_buf[3] << 2, srb->msgin_buf[4]);

		memcpy(srb->msgout_buf, srb->msgin_buf, 5);
		srb->msg_count = 5;
		DC395x_ENABLE_MSGOUT;
		dcb->sync_mode |= SYNC_NEGO_DONE;
	} else {
		if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
		    && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
			build_wdtr(acb, dcb, srb);
			DC395x_ENABLE_MSGOUT;
			dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
		}
	}
	srb->state &= ~SRB_DO_SYNC_NEGO;
	dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;

	reprogram_regs(acb, dcb);
}


static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
		struct ScsiReqBlk *srb)
{
	struct DeviceCtlBlk *dcb = srb->dcb;
	dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);

	dcb->sync_period &= ~WIDE_SYNC;
	dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
	dcb->sync_mode |= WIDE_NEGO_DONE;
	srb->state &= ~SRB_DO_WIDE_NEGO;
	reprogram_regs(acb, dcb);
	if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
	    && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
		build_sdtr(acb, dcb, srb);
		DC395x_ENABLE_MSGOUT;
		dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
	}
}

static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
	struct DeviceCtlBlk *dcb = srb->dcb;
	u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
		   && acb->config & HCC_WIDE_CARD) ? 1 : 0;
	dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);

	if (srb->msgin_buf[3] > wide)
		srb->msgin_buf[3] = wide;
	/* Completed */
	if (!(srb->state & SRB_DO_WIDE_NEGO)) {
		dprintkl(KERN_DEBUG,
			"msgin_set_wide: Wide nego initiated <%02i>\n",
			dcb->target_id);
		memcpy(srb->msgout_buf, srb->msgin_buf, 4);
		srb->msg_count = 4;
		srb->state |= SRB_DO_WIDE_NEGO;
		DC395x_ENABLE_MSGOUT;
	}

	dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
	if (srb->msgin_buf[3] > 0)
		dcb->sync_period |= WIDE_SYNC;
	else
		dcb->sync_period &= ~WIDE_SYNC;
	srb->state &= ~SRB_DO_WIDE_NEGO;
	/*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
	dprintkdbg(DBG_1,
		"msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
		(8 << srb->msgin_buf[3]), dcb->target_id);
	reprogram_regs(acb, dcb);
	if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
	    && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
		build_sdtr(acb, dcb, srb);
		DC395x_ENABLE_MSGOUT;
		dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
	}
}


/*
 * extended message codes:
 *
 *	code	description
 *
 *	02h	Reserved
 *	00h	MODIFY DATA  POINTER
 *	01h	SYNCHRONOUS DATA TRANSFER REQUEST
 *	03h	WIDE DATA TRANSFER REQUEST
 *   04h - 7Fh	Reserved
 *   80h - FFh	Vendor specific
 */
static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
	struct DeviceCtlBlk *dcb = acb->active_dcb;
	dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid);

	srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
	if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
		/* Now eval the msg */
		switch (srb->msgin_buf[0]) {
		case DISCONNECT:
			srb->state = SRB_DISCONNECT;
			break;

		case SIMPLE_QUEUE_TAG:
		case HEAD_OF_QUEUE_TAG:
		case ORDERED_QUEUE_TAG:
			srb =
			    msgin_qtag(acb, dcb,
					      srb->msgin_buf[1]);
			break;

		case MESSAGE_REJECT:
			DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
				       DO_CLRATN | DO_DATALATCH);
			/* A sync nego message was rejected ! */
			if (srb->state & SRB_DO_SYNC_NEGO) {
				msgin_set_async(acb, srb);
				break;
			}
			/* A wide nego message was rejected ! */
			if (srb->state & SRB_DO_WIDE_NEGO) {
				msgin_set_nowide(acb, srb);
				break;
			}
			enable_msgout_abort(acb, srb);
			/*srb->state |= SRB_ABORT_SENT */
			break;

		case EXTENDED_MESSAGE:
			/* SDTR */
			if (srb->msgin_buf[1] == 3
			    && srb->msgin_buf[2] == EXTENDED_SDTR) {
				msgin_set_sync(acb, srb);
				break;
			}
			/* WDTR */
			if (srb->msgin_buf[1] == 2
			    && srb->msgin_buf[2] == EXTENDED_WDTR
			    && srb->msgin_buf[3] <= 2) { /* sanity check ... */
				msgin_set_wide(acb, srb);
				break;
			}
			msgin_reject(acb, srb);
			break;

		case MSG_IGNOREWIDE:
			/* Discard  wide residual */
			dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
			break;

		case COMMAND_COMPLETE:
			/* nothing has to be done */
			break;

		case SAVE_POINTERS:
			/*
			 * SAVE POINTER may be ignored as we have the struct
			 * ScsiReqBlk* associated with the scsi command.
			 */
			dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
				"SAVE POINTER rem=%i Ignore\n",
				srb->cmd->pid, srb->total_xfer_length);
			break;

		case RESTORE_POINTERS:
			dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
			break;

		case ABORT:
			dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
				"<%02i-%i> ABORT msg\n",
				srb->cmd->pid, dcb->target_id,
				dcb->target_lun);
			dcb->flag |= ABORT_DEV_;
			enable_msgout_abort(acb, srb);
			break;

		default:
			/* reject unknown messages */
			if (srb->msgin_buf[0] & IDENTIFY_BASE) {
				dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
				srb->msg_count = 1;
				srb->msgout_buf[0] = dcb->identify_msg;
				DC395x_ENABLE_MSGOUT;
				srb->state |= SRB_MSGOUT;
				/*break; */
			}
			msgin_reject(acb, srb);
		}

		/* Clear counter and MsgIn state */
		srb->state &= ~SRB_MSGIN;
		acb->msg_len = 0;
	}
	*pscsi_status = PH_BUS_FREE;
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important ... you know! */
	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
}


static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
	dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid);
	clear_fifo(acb, "msgin_phase1");
	DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
	if (!(srb->state & SRB_MSGIN)) {
		srb->state &= ~SRB_DISCONNECT;
		srb->state |= SRB_MSGIN;
	}
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
	/* SCSI command */
	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
}


static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
}


static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
		u16 *pscsi_status)
{
}


static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
{
	struct DeviceCtlBlk *i;

	/* set all lun device's  period, offset */
	if (dcb->identify_msg & 0x07)
		return;

	if (acb->scan_devices) {
		current_sync_offset = dcb->sync_offset;
		return;
	}

	list_for_each_entry(i, &acb->dcb_list, list)
		if (i->target_id == dcb->target_id) {
			i->sync_period = dcb->sync_period;
			i->sync_offset = dcb->sync_offset;
			i->sync_mode = dcb->sync_mode;
			i->min_nego_period = dcb->min_nego_period;
		}
}


static void disconnect(struct AdapterCtlBlk *acb)
{
	struct DeviceCtlBlk *dcb = acb->active_dcb;
	struct ScsiReqBlk *srb;

	if (!dcb) {
		dprintkl(KERN_ERR, "disconnect: No such device\n");
		udelay(500);
		/* Suspend queue for a while */
		acb->scsi_host->last_reset =
		    jiffies + HZ / 2 +
		    HZ * acb->eeprom.delay_time;
		clear_fifo(acb, "disconnectEx");
		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
		return;
	}
	srb = dcb->active_srb;
	acb->active_dcb = NULL;
	dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid);

	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
	clear_fifo(acb, "disconnect");
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
	if (srb->state & SRB_UNEXPECT_RESEL) {
		dprintkl(KERN_ERR,
			"disconnect: Unexpected reselection <%02i-%i>\n",
			dcb->target_id, dcb->target_lun);
		srb->state = 0;
		waiting_process_next(acb);
	} else if (srb->state & SRB_ABORT_SENT) {
		dcb->flag &= ~ABORT_DEV_;
		acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
		dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
		doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
		waiting_process_next(acb);
	} else {
		if ((srb->state & (SRB_START_ + SRB_MSGOUT))
		    || !(srb->
			 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
			/*
			 * Selection time out 
			 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
			 */
			/* Unexp. Disc / Sel Timeout */
			if (srb->state != SRB_START_
			    && srb->state != SRB_MSGOUT) {
				srb->state = SRB_READY;
				dprintkl(KERN_DEBUG,
					"disconnect: (pid#%li) Unexpected\n",
					srb->cmd->pid);
				srb->target_status = SCSI_STAT_SEL_TIMEOUT;
				goto disc1;
			} else {
				/* Normal selection timeout */
				dprintkdbg(DBG_KG, "disconnect: (pid#%li) "
					"<%02i-%i> SelTO\n", srb->cmd->pid,
					dcb->target_id, dcb->target_lun);
				if (srb->retry_count++ > DC395x_MAX_RETRIES
				    || acb->scan_devices) {
					srb->target_status =
					    SCSI_STAT_SEL_TIMEOUT;
					goto disc1;
				}
				free_tag(dcb, srb);
				srb_going_to_waiting_move(dcb, srb);
				dprintkdbg(DBG_KG,
					"disconnect: (pid#%li) Retry\n",
					srb->cmd->pid);
				waiting_set_timer(acb, HZ / 20);
			}
		} else if (srb->state & SRB_DISCONNECT) {
			u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
			/*
			 * SRB_DISCONNECT (This is what we expect!)
			 */
			if (bval & 0x40) {
				dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
					" 0x%02x: ACK set! Other controllers?\n",
					bval);
				/* It could come from another initiator, therefore don't do much ! */
			} else
				waiting_process_next(acb);
		} else if (srb->state & SRB_COMPLETED) {
		      disc1:
			/*
			 ** SRB_COMPLETED
			 */
			free_tag(dcb, srb);
			dcb->active_srb = NULL;
			srb->state = SRB_FREE;
			srb_done(acb, dcb, srb);
		}
	}
}


static void reselect(struct AdapterCtlBlk *acb)
{
	struct DeviceCtlBlk *dcb = acb->active_dcb;
	struct ScsiReqBlk *srb = NULL;
	u16 rsel_tar_lun_id;
	u8 id, lun;
	u8 arblostflag = 0;
	dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);

	clear_fifo(acb, "reselect");
	/*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
	/* Read Reselected Target ID and LUN */
	rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
	if (dcb) {		/* Arbitration lost but Reselection win */
		srb = dcb->active_srb;
		if (!srb) {
			dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
				"but active_srb == NULL\n");
			DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
			return;
		}
		/* Why the if ? */
		if (!acb->scan_devices) {
			dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> "
				"Arb lost but Resel win rsel=%i stat=0x%04x\n",
				srb->cmd->pid, dcb->target_id,
				dcb->target_lun, rsel_tar_lun_id,
				DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
			arblostflag = 1;
			/*srb->state |= SRB_DISCONNECT; */

			srb->state = SRB_READY;
			free_tag(dcb, srb);
			srb_going_to_waiting_move(dcb, srb);
			waiting_set_timer(acb, HZ / 20);

			/* return; */
		}
	}
	/* Read Reselected Target Id and LUN */
	if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
		dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
			"Got %i!\n", rsel_tar_lun_id);
	id = rsel_tar_lun_id & 0xff;
	lun = (rsel_tar_lun_id >> 8) & 7;
	dcb = find_dcb(acb, id, lun);
	if (!dcb) {
		dprintkl(KERN_ERR, "reselect: From non existent device "
			"<%02i-%i>\n", id, lun);
		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
		return;
	}
	acb->active_dcb = dcb;

	if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
		dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
			"disconnection? <%02i-%i>\n",
			dcb->target_id, dcb->target_lun);

	if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
		srb = acb->tmp_srb;
		dcb->active_srb = srb;
	} else {
		/* There can be only one! */
		srb = dcb->active_srb;
		if (!srb || !(srb->state & SRB_DISCONNECT)) {
			/*
			 * abort command
			 */
			dprintkl(KERN_DEBUG,
				"reselect: w/o disconnected cmds <%02i-%i>\n",
				dcb->target_id, dcb->target_lun);
			srb = acb->tmp_srb;
			srb->state = SRB_UNEXPECT_RESEL;
			dcb->active_srb = srb;
			enable_msgout_abort(acb, srb);
		} else {
			if (dcb->flag & ABORT_DEV_) {
				/*srb->state = SRB_ABORT_SENT; */
				enable_msgout_abort(acb, srb);
			} else
				srb->state = SRB_DATA_XFER;

		}
	}
	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */

	/* Program HA ID, target ID, period and offset */
	dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
	DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);	/* host   ID */
	DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);		/* target ID */
	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);		/* offset    */
	DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);		/* sync period, wide */
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);		/* it's important for atn stop */
	/* SCSI command */
	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
}


static inline u8 tagq_blacklist(char *name)
{
#ifndef DC395x_NO_TAGQ
#if 0
	u8 i;
	for (i = 0; i < BADDEVCNT; i++)
		if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
			return 1;
#endif
	return 0;
#else
	return 1;
#endif
}


static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
{
	/* Check for SCSI format (ANSI and Response data format) */
	if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
		if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
		    && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
		    /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
		    /* ((dcb->dev_type == TYPE_DISK) 
		       || (dcb->dev_type == TYPE_MOD)) && */
		    !tagq_blacklist(((char *)ptr) + 8)) {
			if (dcb->max_command == 1)
				dcb->max_command =
				    dcb->acb->tag_max_num;
			dcb->sync_mode |= EN_TAG_QUEUEING;
			/*dcb->tag_mask = 0; */
		} else
			dcb->max_command = 1;
	}
}


static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
		struct ScsiInqData *ptr)
{
	u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
	dcb->dev_type = bval1;
	/* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
	disc_tagq_set(dcb, ptr);
}


/* unmap mapped pci regions from SRB */
static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
	struct scsi_cmnd *cmd = srb->cmd;
	enum dma_data_direction dir = cmd->sc_data_direction;

	if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
		/* unmap DC395x SG list */
		dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
			srb->sg_bus_addr, SEGMENTX_LEN);
		pci_unmap_single(acb->dev, srb->sg_bus_addr,
				 SEGMENTX_LEN,
				 PCI_DMA_TODEVICE);
		dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
			   scsi_sg_count(cmd), scsi_bufflen(cmd));
		/* unmap the sg segments */
		scsi_dma_unmap(cmd);
	}
}


/* unmap mapped pci sense buffer from SRB */
static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
		struct ScsiReqBlk *srb)
{
	if (!(srb->flag & AUTO_REQSENSE))
		return;
	/* Unmap sense buffer */
	dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
	       srb->segment_x[0].address);
	pci_unmap_single(acb->dev, srb->segment_x[0].address,
			 srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
	/* Restore SG stuff */
	srb->total_xfer_length = srb->xferred;
	srb->segment_x[0].address =
	    srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
	srb->segment_x[0].length =
	    srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
}


/*
 * Complete execution of a SCSI command
 * Signal completion to the generic SCSI driver  
 */
static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb)
{
	u8 tempcnt, status;
	struct scsi_cmnd *cmd = srb->cmd;
	enum dma_data_direction dir = cmd->sc_data_direction;
	int ckc_only = 1;

	dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid,
		srb->cmd->device->id, srb->cmd->device->lun);
	dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
		   srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
		   scsi_sgtalbe(cmd));
	status = srb->target_status;
	if (srb->flag & AUTO_REQSENSE) {
		dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
		pci_unmap_srb_sense(acb, srb);
		/*
		 ** target status..........................
		 */
		srb->flag &= ~AUTO_REQSENSE;
		srb->adapter_status = 0;
		srb->target_status = CHECK_CONDITION << 1;
		if (debug_enabled(DBG_1)) {
			switch (cmd->sense_buffer[2] & 0x0f) {
			case NOT_READY:
				dprintkl(KERN_DEBUG,
				     "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
				     cmd->cmnd[0], dcb->target_id,
				     dcb->target_lun, status, acb->scan_devices);
				break;
			case UNIT_ATTENTION:
				dprintkl(KERN_DEBUG,
				     "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
				     cmd->cmnd[0], dcb->target_id,
				     dcb->target_lun, status, acb->scan_devices);
				break;
			case ILLEGAL_REQUEST:
				dprintkl(KERN_DEBUG,
				     "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
				     cmd->cmnd[0], dcb->target_id,
				     dcb->target_lun, status, acb->scan_devices);
				break;
			case MEDIUM_ERROR:
				dprintkl(KERN_DEBUG,
				     "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
				     cmd->cmnd[0], dcb->target_id,
				     dcb->target_lun, status, acb->scan_devices);
				break;
			case HARDWARE_ERROR:
				dprintkl(KERN_DEBUG,
				     "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
				     cmd->cmnd[0], dcb->target_id,
				     dcb->target_lun, status, acb->scan_devices);
				break;
			}
			if (cmd->sense_buffer[7] >= 6)
				printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
					"(0x%08x 0x%08x)\n",
					cmd->sense_buffer[2], cmd->sense_buffer[12],
					cmd->sense_buffer[13],
					*((unsigned int *)(cmd->sense_buffer + 3)),
					*((unsigned int *)(cmd->sense_buffer + 8)));
			else
				printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
					cmd->sense_buffer[2],
					*((unsigned int *)(cmd->sense_buffer + 3)));
		}

		if (status == (CHECK_CONDITION << 1)) {
			cmd->result = DID_BAD_TARGET << 16;
			goto ckc_e;
		}
		dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");

		if (srb->total_xfer_length
		    && srb->total_xfer_length >= cmd->underflow)
			cmd->result =
			    MK_RES_LNX(DRIVER_SENSE, DID_OK,
				       srb->end_message, CHECK_CONDITION);
		/*SET_RES_DID(cmd->result,DID_OK) */
		else
			cmd->result =
			    MK_RES_LNX(DRIVER_SENSE, DID_OK,
				       srb->end_message, CHECK_CONDITION);

		goto ckc_e;
	}

/*************************************************************/
	if (status) {
		/*
		 * target status..........................
		 */
		if (status_byte(status) == CHECK_CONDITION) {
			request_sense(acb, dcb, srb);
			return;
		} else if (status_byte(status) == QUEUE_FULL) {
			tempcnt = (u8)list_size(&dcb->srb_going_list);
			dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
			     dcb->target_id, dcb->target_lun, tempcnt);
			if (tempcnt > 1)
				tempcnt--;
			dcb->max_command = tempcnt;
			free_tag(dcb, srb);
			srb_going_to_waiting_move(dcb, srb);
			waiting_set_timer(acb, HZ / 20);
			srb->adapter_status = 0;
			srb->target_status = 0;
			return;
		} else if (status == SCSI_STAT_SEL_TIMEOUT) {
			srb->adapter_status = H_SEL_TIMEOUT;
			srb->target_status = 0;
			cmd->result = DID_NO_CONNECT << 16;
		} else {
			srb->adapter_status = 0;
			SET_RES_DID(cmd->result, DID_ERROR);
			SET_RES_MSG(cmd->result, srb->end_message);
			SET_RES_TARGET(cmd->result, status);

		}
	} else {
		/*
		 ** process initiator status..........................
		 */
		status = srb->adapter_status;
		if (status & H_OVER_UNDER_RUN) {
			srb->target_status = 0;
			SET_RES_DID(cmd->result, DID_OK);
			SET_RES_MSG(cmd->result, srb->end_message);
		} else if (srb->status & PARITY_ERROR) {
			SET_RES_DID(cmd->result, DID_PARITY);
			SET_RES_MSG(cmd->result, srb->end_message);
		} else {	/* No error */

			srb->adapter_status = 0;
			srb->target_status = 0;
			SET_RES_DID(cmd->result, DID_OK);
		}
	}

	if (dir != PCI_DMA_NONE && scsi_sg_count(cmd))
		pci_dma_sync_sg_for_cpu(acb->dev, scsi_sglist(cmd),
					scsi_sg_count(cmd), dir);

	ckc_only = 0;
/* Check Error Conditions */
      ckc_e:

	if (cmd->cmnd[0] == INQUIRY) {
		unsigned char *base = NULL;
		struct ScsiInqData *ptr;
		unsigned long flags = 0;
		struct scatterlist* sg = scsi_sglist(cmd);
		size_t offset = 0, len = sizeof(struct ScsiInqData);

		local_irq_save(flags);
		base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
		ptr = (struct ScsiInqData *)(base + offset);

		if (!ckc_only && (cmd->result & RES_DID) == 0
		    && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
		    && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
			dcb->inquiry7 = ptr->Flags;

	/*if( srb->cmd->cmnd[0] == INQUIRY && */
	/*  (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
		if ((cmd->result == (DID_OK << 16)
		     || status_byte(cmd->result) &
		     CHECK_CONDITION)) {
			if (!dcb->init_tcq_flag) {
				add_dev(acb, dcb, ptr);
				dcb->init_tcq_flag = 1;
			}
		}

		scsi_kunmap_atomic_sg(base);
		local_irq_restore(flags);
	}

	/* Here is the info for Doug Gilbert's sg3 ... */
	scsi_set_resid(cmd, srb->total_xfer_length);
	/* This may be interpreted by sb. or not ... */
	cmd->SCp.this_residual = srb->total_xfer_length;
	cmd->SCp.buffers_residual = 0;
	if (debug_enabled(DBG_KG)) {
		if (srb->total_xfer_length)
			dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> "
				"cmnd=0x%02x Missed %i bytes\n",
				cmd->pid, cmd->device->id, cmd->device->lun,
				cmd->cmnd[0], srb->total_xfer_length);
	}

	srb_going_remove(dcb, srb);
	/* Add to free list */
	if (srb == acb->tmp_srb)
		dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
	else {
		dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n",
			cmd->pid, cmd->result);
		srb_free_insert(acb, srb);
	}
	pci_unmap_srb(acb, srb);

	cmd->scsi_done(cmd);
	waiting_process_next(acb);
}


/* abort all cmds in our queues */
static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
		struct scsi_cmnd *cmd, u8 force)
{
	struct DeviceCtlBlk *dcb;
	dprintkl(KERN_INFO, "doing_srb_done: pids ");

	list_for_each_entry(dcb, &acb->dcb_list, list) {
		struct ScsiReqBlk *srb;
		struct ScsiReqBlk *tmp;
		struct scsi_cmnd *p;

		list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
			enum dma_data_direction dir;
			int result;

			p = srb->cmd;
			dir = p->sc_data_direction;
			result = MK_RES(0, did_flag, 0, 0);
			printk("G:%li(%02i-%i) ", p->pid,
			       p->device->id, p->device->lun);
			srb_going_remove(dcb, srb);
			free_tag(dcb, srb);
			srb_free_insert(acb, srb);
			p->result = result;
			pci_unmap_srb_sense(acb, srb);
			pci_unmap_srb(acb, srb);
			if (force) {
				/* For new EH, we normally don't need to give commands back,
				 * as they all complete or all time out */
				p->scsi_done(p);
			}
		}
		if (!list_empty(&dcb->srb_going_list))
			dprintkl(KERN_DEBUG, 
			       "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
			       dcb->target_id, dcb->target_lun);
		if (dcb->tag_mask)
			dprintkl(KERN_DEBUG,
			       "tag_mask for <%02i-%i> should be empty, is %08x!\n",
			       dcb->target_id, dcb->target_lun,
			       dcb->tag_mask);

		/* Waiting queue */
		list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
			int result;
			p = srb->cmd;

			result = MK_RES(0, did_flag, 0, 0);
			printk("W:%li<%02i-%i>", p->pid, p->device->id,
			       p->device->lun);
			srb_waiting_remove(dcb, srb);
			srb_free_insert(acb, srb);
			p->result = result;
			pci_unmap_srb_sense(acb, srb);
			pci_unmap_srb(acb, srb);
			if (force) {
				/* For new EH, we normally don't need to give commands back,
				 * as they all complete or all time out */
				cmd->scsi_done(cmd);
			}
		}
		if (!list_empty(&dcb->srb_waiting_list))
			dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
			     list_size(&dcb->srb_waiting_list), dcb->target_id,
			     dcb->target_lun);
		dcb->flag &= ~ABORT_DEV_;
	}
	printk("\n");
}


static void reset_scsi_bus(struct AdapterCtlBlk *acb)
{
	dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
	acb->acb_flag |= RESET_DEV;	/* RESET_DETECT, RESET_DONE, RESET_DEV */
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);

	while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
		/* nothing */;
}


static void set_basic_config(struct AdapterCtlBlk *acb)
{
	u8 bval;
	u16 wval;
	DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
	if (acb->config & HCC_PARITY)
		bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
	else
		bval = PHASELATCH | INITIATOR | BLOCKRST;

	DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);

	/* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
	DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03);	/* was 0x13: default */
	/* program Host ID                  */
	DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
	/* set ansynchronous transfer       */
	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
	/* Turn LED control off */
	wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
	DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
	/* DMA config          */
	wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
	wval |=
	    DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
	DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
	/* Clear pending interrupt status */
	DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
	/* Enable SCSI interrupt    */
	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
	DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
		      /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
		      );
}


static void scsi_reset_detect(struct AdapterCtlBlk *acb)
{
	dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
	/* delay half a second */
	if (timer_pending(&acb->waiting_timer))
		del_timer(&acb->waiting_timer);

	DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
	/*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
	udelay(500);
	/* Maybe we locked up the bus? Then lets wait even longer ... */
	acb->scsi_host->last_reset =
	    jiffies + 5 * HZ / 2 +
	    HZ * acb->eeprom.delay_time;

	clear_fifo(acb, "scsi_reset_detect");
	set_basic_config(acb);
	/*1.25 */
	/*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */

	if (acb->acb_flag & RESET_DEV) {	/* RESET_DETECT, RESET_DONE, RESET_DEV */
		acb->acb_flag |= RESET_DONE;
	} else {
		acb->acb_flag |= RESET_DETECT;
		reset_dev_param(acb);
		doing_srb_done(acb, DID_RESET, NULL, 1);
		/*DC395x_RecoverSRB( acb ); */
		acb->active_dcb = NULL;
		acb->acb_flag = 0;
		waiting_process_next(acb);
	}
}


static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
		struct ScsiReqBlk *srb)
{
	struct scsi_cmnd *cmd = srb->cmd;
	dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n",
		cmd->pid, cmd->device->id, cmd->device->lun);

	srb->flag |= AUTO_REQSENSE;
	srb->adapter_status = 0;
	srb->target_status = 0;

	/* KG: Can this prevent crap sense data ? */
	memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));

	/* Save some data */
	srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
	    srb->segment_x[0].address;
	srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
	    srb->segment_x[0].length;
	srb->xferred = srb->total_xfer_length;
	/* srb->segment_x : a one entry of S/G list table */
	srb->total_xfer_length = sizeof(cmd->sense_buffer);
	srb->segment_x[0].length = sizeof(cmd->sense_buffer);
	/* Map sense buffer */
	srb->segment_x[0].address =
	    pci_map_single(acb->dev, cmd->sense_buffer,
			   sizeof(cmd->sense_buffer), PCI_DMA_FROMDEVICE);
	dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
	       cmd->sense_buffer, srb->segment_x[0].address,
	       sizeof(cmd->sense_buffer));
	srb->sg_count = 1;
	srb->sg_index = 0;

	if (start_scsi(acb, dcb, srb)) {	/* Should only happen, if sb. else grabs the bus */
		dprintkl(KERN_DEBUG,
			"request_sense: (pid#%li) failed <%02i-%i>\n",
			srb->cmd->pid, dcb->target_id, dcb->target_lun);
		srb_going_to_waiting_move(dcb, srb);
		waiting_set_timer(acb, HZ / 100);
	}
}


/**
 * device_alloc - Allocate a new device instance. This create the
 * devices instance and sets up all the data items. The adapter
 * instance is required to obtain confiuration information for this
 * device. This does *not* add this device to the adapters device
 * list.
 *
 * @acb: The adapter to obtain configuration information from.
 * @target: The target for the new device.
 * @lun: The lun for the new device.
 *
 * Return the new device if successful or NULL on failure.
 **/
static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
		u8 target, u8 lun)
{
	struct NvRamType *eeprom = &acb->eeprom;
	u8 period_index = eeprom->target[target].period & 0x07;
	struct DeviceCtlBlk *dcb;

	dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
	dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
	if (!dcb)
		return NULL;
	dcb->acb = NULL;
	INIT_LIST_HEAD(&dcb->srb_going_list);
	INIT_LIST_HEAD(&dcb->srb_waiting_list);
	dcb->active_srb = NULL;
	dcb->tag_mask = 0;
	dcb->max_command = 1;
	dcb->target_id = target;
	dcb->target_lun = lun;
#ifndef DC395x_NO_DISCONNECT
	dcb->identify_msg =
	    IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
#else
	dcb->identify_msg = IDENTIFY(0, lun);
#endif
	dcb->dev_mode = eeprom->target[target].cfg0;
	dcb->inquiry7 = 0;
	dcb->sync_mode = 0;
	dcb->min_nego_period = clock_period[period_index];
	dcb->sync_period = 0;
	dcb->sync_offset = 0;
	dcb->flag = 0;

#ifndef DC395x_NO_WIDE
	if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
	    && (acb->config & HCC_WIDE_CARD))
		dcb->sync_mode |= WIDE_NEGO_ENABLE;
#endif
#ifndef DC395x_NO_SYNC
	if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
		if (!(lun) || current_sync_offset)
			dcb->sync_mode |= SYNC_NEGO_ENABLE;
#endif
	if (dcb->target_lun != 0) {
		/* Copy settings */
		struct DeviceCtlBlk *p;
		list_for_each_entry(p, &acb->dcb_list, list)
			if (p->target_id == dcb->target_id)
				break;
		dprintkdbg(DBG_1, 
		       "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
		       dcb->target_id, dcb->target_lun,
		       p->target_id, p->target_lun);
		dcb->sync_mode = p->sync_mode;
		dcb->sync_period = p->sync_period;
		dcb->min_nego_period = p->min_nego_period;
		dcb->sync_offset = p->sync_offset;
		dcb->inquiry7 = p->inquiry7;
	}
	return dcb;
}


/**
 * adapter_add_device - Adds the device instance to the adaptor instance.
 *
 * @acb: The adapter device to be updated
 * @dcb: A newly created and intialised device instance to add.
 **/
static void adapter_add_device(struct AdapterCtlBlk *acb,
		struct DeviceCtlBlk *dcb)
{
	/* backpointer to adapter */
	dcb->acb = acb;
	
	/* set run_robin to this device if it is currently empty */
	if (list_empty(&acb->dcb_list))
		acb->dcb_run_robin = dcb;

	/* add device to list */
	list_add_tail(&dcb->list, &acb->dcb_list);

	/* update device maps */
	acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
	acb->children[dcb->target_id][dcb->target_lun] = dcb;
}


/**
 * adapter_remove_device - Removes the device instance from the adaptor
 * instance. The device instance is not check in any way or freed by this. 
 * The caller is expected to take care of that. This will simply remove the
 * device from the adapters data strcutures.
 *
 * @acb: The adapter device to be updated
 * @dcb: A device that has previously been added to the adapter.
 **/
static void adapter_remove_device(struct AdapterCtlBlk *acb,
		struct DeviceCtlBlk *dcb)
{
	struct DeviceCtlBlk *i;
	struct DeviceCtlBlk *tmp;
	dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
		dcb->target_id, dcb->target_lun);

	/* fix up any pointers to this device that we have in the adapter */
	if (acb->active_dcb == dcb)
		acb->active_dcb = NULL;
	if (acb->dcb_run_robin == dcb)
		acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);

	/* unlink from list */
	list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
		if (dcb == i) {
			list_del(&i->list);
			break;
		}

	/* clear map and children */	
	acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
	acb->children[dcb->target_id][dcb->target_lun] = NULL;
	dcb->acb = NULL;
}


/**
 * adapter_remove_and_free_device - Removes a single device from the adapter
 * and then frees the device information.
 *
 * @acb: The adapter device to be updated
 * @dcb: A device that has previously been added to the adapter.
 */
static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
		struct DeviceCtlBlk *dcb)
{
	if (list_size(&dcb->srb_going_list) > 1) {
		dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
		           "Won't remove because of %i active requests.\n",
			   dcb->target_id, dcb->target_lun,
			   list_size(&dcb->srb_going_list));
		return;
	}
	adapter_remove_device(acb, dcb);
	kfree(dcb);
}


/**
 * adapter_remove_and_free_all_devices - Removes and frees all of the
 * devices associated with the specified adapter.
 *
 * @acb: The adapter from which all devices should be removed.
 **/
static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
{
	struct DeviceCtlBlk *dcb;
	struct DeviceCtlBlk *tmp;
	dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
		   list_size(&acb->dcb_list));

	list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
		adapter_remove_and_free_device(acb, dcb);
}


/**
 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
 * scsi device that we need to deal with. We allocate a new device and then
 * insert that device into the adapters device list.
 *
 * @scsi_device: The new scsi device that we need to handle.
 **/
static int dc395x_slave_alloc(struct scsi_device *scsi_device)
{
	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
	struct DeviceCtlBlk *dcb;

	dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
	if (!dcb)
		return -ENOMEM;
	adapter_add_device(acb, dcb);

	return 0;
}


/**
 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
 * device that is going away.
 *
 * @scsi_device: The new scsi device that we need to handle.
 **/
static void dc395x_slave_destroy(struct scsi_device *scsi_device)
{
	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
	struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
	if (dcb)
		adapter_remove_and_free_device(acb, dcb);
}




/**
 * trms1040_wait_30us: wait for 30 us
 *
 * Waits for 30us (using the chip by the looks of it..)
 *
 * @io_port: base I/O address
 **/
static void __devinit trms1040_wait_30us(unsigned long io_port)
{
	/* ScsiPortStallExecution(30); wait 30 us */
	outb(5, io_port + TRM_S1040_GEN_TIMER);
	while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
		/* nothing */ ;
}


/**
 * trms1040_write_cmd - write the secified command and address to
 * chip
 *
 * @io_port:	base I/O address
 * @cmd:	SB + op code (command) to send
 * @addr:	address to send
 **/
static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
{
	int i;
	u8 send_data;

	/* program SB + OP code */
	for (i = 0; i < 3; i++, cmd <<= 1) {
		send_data = NVR_SELECT;
		if (cmd & 0x04)	/* Start from bit 2 */
			send_data |= NVR_BITOUT;

		outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
		trms1040_wait_30us(io_port);
		outb((send_data | NVR_CLOCK),
		     io_port + TRM_S1040_GEN_NVRAM);
		trms1040_wait_30us(io_port);
	}

	/* send address */
	for (i = 0; i < 7; i++, addr <<= 1) {
		send_data = NVR_SELECT;
		if (addr & 0x40)	/* Start from bit 6 */
			send_data |= NVR_BITOUT;

		outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
		trms1040_wait_30us(io_port);
		outb((send_data | NVR_CLOCK),
		     io_port + TRM_S1040_GEN_NVRAM);
		trms1040_wait_30us(io_port);
	}
	outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
	trms1040_wait_30us(io_port);
}


/**
 * trms1040_set_data - store a single byte in the eeprom
 *
 * Called from write all to write a single byte into the SSEEPROM
 * Which is done one bit at a time.
 *
 * @io_port:	base I/O address
 * @addr:	offset into EEPROM
 * @byte:	bytes to write
 **/
static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
{
	int i;
	u8 send_data;

	/* Send write command & address */
	trms1040_write_cmd(io_port, 0x05, addr);

	/* Write data */
	for (i = 0; i < 8; i++, byte <<= 1) {
		send_data = NVR_SELECT;
		if (byte & 0x80)	/* Start from bit 7 */
			send_data |= NVR_BITOUT;

		outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
		trms1040_wait_30us(io_port);
		outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
		trms1040_wait_30us(io_port);
	}
	outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
	trms1040_wait_30us(io_port);

	/* Disable chip select */
	outb(0, io_port + TRM_S1040_GEN_NVRAM);
	trms1040_wait_30us(io_port);

	outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
	trms1040_wait_30us(io_port);

	/* Wait for write ready */
	while (1) {
		outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
		trms1040_wait_30us(io_port);

		outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
		trms1040_wait_30us(io_port);

		if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
			break;
	}

	/*  Disable chip select */
	outb(0, io_port + TRM_S1040_GEN_NVRAM);
}


/**
 * trms1040_write_all - write 128 bytes to the eeprom
 *
 * Write the supplied 128 bytes to the chips SEEPROM
 *
 * @eeprom:	the data to write
 * @io_port:	the base io port
 **/
static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
{
	u8 *b_eeprom = (u8 *)eeprom;
	u8 addr;

	/* Enable SEEPROM */
	outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
	     io_port + TRM_S1040_GEN_CONTROL);

	/* write enable */
	trms1040_write_cmd(io_port, 0x04, 0xFF);
	outb(0, io_port + TRM_S1040_GEN_NVRAM);
	trms1040_wait_30us(io_port);

	/* write */
	for (addr = 0; addr < 128; addr++, b_eeprom++)
		trms1040_set_data(io_port, addr, *b_eeprom);

	/* write disable */
	trms1040_write_cmd(io_port, 0x04, 0x00);
	outb(0, io_port + TRM_S1040_GEN_NVRAM);
	trms1040_wait_30us(io_port);

	/* Disable SEEPROM */
	outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
	     io_port + TRM_S1040_GEN_CONTROL);
}


/**
 * trms1040_get_data - get a single byte from the eeprom
 *
 * Called from read all to read a single byte into the SSEEPROM
 * Which is done one bit at a time.
 *
 * @io_port:	base I/O address
 * @addr:	offset into SEEPROM
 *
 * Returns the byte read.
 **/
static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr)
{
	int i;
	u8 read_byte;
	u8 result = 0;

	/* Send read command & address */
	trms1040_write_cmd(io_port, 0x06, addr);

	/* read data */
	for (i = 0; i < 8; i++) {
		outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
		trms1040_wait_30us(io_port);
		outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);

		/* Get data bit while falling edge */
		read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
		result <<= 1;
		if (read_byte & NVR_BITIN)
			result |= 1;

		trms1040_wait_30us(io_port);
	}

	/* Disable chip select */
	outb(0, io_port + TRM_S1040_GEN_NVRAM);
	return result;
}


/**
 * trms1040_read_all - read all bytes from the eeprom
 *
 * Read the 128 bytes from the SEEPROM.
 *
 * @eeprom:	where to store the data
 * @io_port:	the base io port
 **/
static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
{
	u8 *b_eeprom = (u8 *)eeprom;
	u8 addr;

	/* Enable SEEPROM */
	outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
	     io_port + TRM_S1040_GEN_CONTROL);

	/* read details */
	for (addr = 0; addr < 128; addr++, b_eeprom++)
		*b_eeprom = trms1040_get_data(io_port, addr);

	/* Disable SEEPROM */
	outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
	     io_port + TRM_S1040_GEN_CONTROL);
}



/**
 * check_eeprom - get and check contents of the eeprom
 *
 * Read seeprom 128 bytes into the memory provider in eeprom.
 * Checks the checksum and if it's not correct it uses a set of default
 * values.
 *
 * @eeprom:	caller allocated strcuture to read the eeprom data into
 * @io_port:	io port to read from
 **/
static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
{
	u16 *w_eeprom = (u16 *)eeprom;
	u16 w_addr;
	u16 cksum;
	u32 d_addr;
	u32 *d_eeprom;

	trms1040_read_all(eeprom, io_port);	/* read eeprom */

	cksum = 0;
	for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
	     w_addr++, w_eeprom++)
		cksum += *w_eeprom;
	if (cksum != 0x1234) {
		/*
		 * Checksum is wrong.
		 * Load a set of defaults into the eeprom buffer
		 */
		dprintkl(KERN_WARNING,
			"EEProm checksum error: using default values and options.\n");
		eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
		eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
		eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
		eeprom->sub_sys_id[1] =
		    (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
		eeprom->sub_class = 0x00;
		eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
		eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
		eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
		eeprom->device_id[1] =
		    (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
		eeprom->reserved = 0x00;

		for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
		     d_addr < 16; d_addr++, d_eeprom++)
			*d_eeprom = 0x00000077;	/* cfg3,cfg2,period,cfg0 */

		*d_eeprom++ = 0x04000F07;	/* max_tag,delay_time,channel_cfg,scsi_id */
		*d_eeprom++ = 0x00000015;	/* reserved1,boot_lun,boot_target,reserved0 */
		for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
			*d_eeprom = 0x00;

		/* Now load defaults (maybe set by boot/module params) */
		set_safe_settings();
		fix_settings();
		eeprom_override(eeprom);

		eeprom->cksum = 0x00;
		for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
		     w_addr < 63; w_addr++, w_eeprom++)
			cksum += *w_eeprom;

		*w_eeprom = 0x1234 - cksum;
		trms1040_write_all(eeprom, io_port);
		eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
	} else {
		set_safe_settings();
		eeprom_index_to_delay(eeprom);
		eeprom_override(eeprom);
	}
}


/**
 * print_eeprom_settings - output the eeprom settings
 * to the kernel log so people can see what they were.
 *
 * @eeprom: The eeprom data strucutre to show details for.
 **/
static void __devinit print_eeprom_settings(struct NvRamType *eeprom)
{
	dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
		eeprom->scsi_id,
		eeprom->target[0].period,
		clock_speed[eeprom->target[0].period] / 10,
		clock_speed[eeprom->target[0].period] % 10,
		eeprom->target[0].cfg0);
	dprintkl(KERN_INFO, "               AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
		eeprom->channel_cfg, eeprom->max_tag,
		1 << eeprom->max_tag, eeprom->delay_time);
}


/* Free SG tables */
static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
{
	int i;
	const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;

	for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
		kfree(acb->srb_array[i].segment_x);
}


/*
 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
 * should never cross a page boundary */
static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
{
	const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
	                            *SEGMENTX_LEN;
	int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
	const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
	int srb_idx = 0;
	unsigned i = 0;
	struct SGentry *ptr;

	for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
		acb->srb_array[i].segment_x = NULL;

	dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
	while (pages--) {
		ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
		if (!ptr) {
			adapter_sg_tables_free(acb);
			return 1;
		}
		dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
			PAGE_SIZE, ptr, srb_idx);
		i = 0;
		while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
			acb->srb_array[srb_idx++].segment_x =
			    ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
	}
	if (i < srbs_per_page)
		acb->srb.segment_x =
		    ptr + (i * DC395x_MAX_SG_LISTENTRY);
	else
		dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
	return 0;
}



/**
 * adapter_print_config - print adapter connection and termination
 * config
 *
 * The io port in the adapter needs to have been set before calling
 * this function.
 *
 * @acb: The adapter to print the information for.
 **/
static void __devinit adapter_print_config(struct AdapterCtlBlk *acb)
{
	u8 bval;

	bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
	dprintkl(KERN_INFO, "%sConnectors: ",
		((bval & WIDESCSI) ? "(Wide) " : ""));
	if (!(bval & CON5068))
		printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
	if (!(bval & CON68))
		printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
	if (!(bval & CON50))
		printk("int50 ");
	if ((bval & (CON5068 | CON50 | CON68)) ==
	    0 /*(CON5068 | CON50 | CON68) */ )
		printk(" Oops! (All 3?) ");
	bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
	printk(" Termination: ");
	if (bval & DIS_TERM)
		printk("Disabled\n");
	else {
		if (bval & AUTOTERM)
			printk("Auto ");
		if (bval & LOW8TERM)
			printk("Low ");
		if (bval & UP8TERM)
			printk("High ");
		printk("\n");
	}
}


/**
 * adapter_init_params - Initialize the various parameters in the
 * adapter structure. Note that the pointer to the scsi_host is set
 * early (when this instance is created) and the io_port and irq
 * values are set later after they have been reserved. This just gets
 * everything set to a good starting position.
 *
 * The eeprom structure in the adapter needs to have been set before
 * calling this function.
 *
 * @acb: The adapter to initialize.
 **/
static void __devinit adapter_init_params(struct AdapterCtlBlk *acb)
{
	struct NvRamType *eeprom = &acb->eeprom;
	int i;

	/* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
	/* NOTE: acb->io_port_base is set at port registration time */
	/* NOTE: acb->io_port_len is set at port registration time */

	INIT_LIST_HEAD(&acb->dcb_list);
	acb->dcb_run_robin = NULL;
	acb->active_dcb = NULL;

	INIT_LIST_HEAD(&acb->srb_free_list);
	/*  temp SRB for Q tag used or abort command used  */
	acb->tmp_srb = &acb->srb;
	init_timer(&acb->waiting_timer);
	init_timer(&acb->selto_timer);

	acb->srb_count = DC395x_MAX_SRB_CNT;

	acb->sel_timeout = DC395x_SEL_TIMEOUT;	/* timeout=250ms */
	/* NOTE: acb->irq_level is set at IRQ registration time */

	acb->tag_max_num = 1 << eeprom->max_tag;
	if (acb->tag_max_num > 30)
		acb->tag_max_num = 30;

	acb->acb_flag = 0;	/* RESET_DETECT, RESET_DONE, RESET_DEV */
	acb->gmode2 = eeprom->channel_cfg;
	acb->config = 0;	/* NOTE: actually set in adapter_init_chip */

	if (eeprom->channel_cfg & NAC_SCANLUN)
		acb->lun_chk = 1;
	acb->scan_devices = 1;

	acb->scsi_host->this_id = eeprom->scsi_id;
	acb->hostid_bit = (1 << acb->scsi_host->this_id);

	for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
		acb->dcb_map[i] = 0;

	acb->msg_len = 0;
	
	/* link static array of srbs into the srb free list */
	for (i = 0; i < acb->srb_count - 1; i++)
		srb_free_insert(acb, &acb->srb_array[i]);
}


/**
 * adapter_init_host - Initialize the scsi host instance based on
 * values that we have already stored in the adapter instance. There's
 * some mention that a lot of these are deprecated, so we won't use
 * them (we'll use the ones in the adapter instance) but we'll fill
 * them in in case something else needs them.
 *
 * The eeprom structure, irq and io ports in the adapter need to have
 * been set before calling this function.
 *
 * @host: The scsi host instance to fill in the values for.
 **/
static void __devinit adapter_init_scsi_host(struct Scsi_Host *host)
{
        struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
	struct NvRamType *eeprom = &acb->eeprom;
        
	host->max_cmd_len = 24;
	host->can_queue = DC395x_MAX_CMD_QUEUE;
	host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
	host->this_id = (int)eeprom->scsi_id;
	host->io_port = acb->io_port_base;
	host->n_io_port = acb->io_port_len;
	host->dma_channel = -1;
	host->unique_id = acb->io_port_base;
	host->irq = acb->irq_level;
	host->last_reset = jiffies;

	host->max_id = 16;
	if (host->max_id - 1 == eeprom->scsi_id)
		host->max_id--;

#ifdef CONFIG_SCSI_MULTI_LUN
	if (eeprom->channel_cfg & NAC_SCANLUN)
		host->max_lun = 8;
	else
		host->max_lun = 1;
#else
	host->max_lun = 1;
#endif

}


/**
 * adapter_init_chip - Get the chip into a know state and figure out
 * some of the settings that apply to this adapter.
 *
 * The io port in the adapter needs to have been set before calling
 * this function. The config will be configured correctly on return.
 *
 * @acb: The adapter which we are to init.
 **/
static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb)
{
        struct NvRamType *eeprom = &acb->eeprom;
        
        /* Mask all the interrupt */
	DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);

	/* Reset SCSI module */
	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);

	/* Reset PCI/DMA module */
	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
	udelay(20);

	/* program configuration 0 */
	acb->config = HCC_AUTOTERM | HCC_PARITY;
	if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
		acb->config |= HCC_WIDE_CARD;

	if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
		acb->config |= HCC_SCSI_RESET;

	if (acb->config & HCC_SCSI_RESET) {
		dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
		DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);

		/*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
		/*spin_unlock_irq (&io_request_lock); */
		udelay(500);

		acb->scsi_host->last_reset =
		    jiffies + HZ / 2 +
		    HZ * acb->eeprom.delay_time;

		/*spin_lock_irq (&io_request_lock); */
	}
}


/**
 * init_adapter - Grab the resource for the card, setup the adapter
 * information, set the card into a known state, create the various
 * tables etc etc. This basically gets all adapter information all up
 * to date, intialised and gets the chip in sync with it.
 *
 * @host:	This hosts adapter structure
 * @io_port:	The base I/O port
 * @irq:	IRQ
 *
 * Returns 0 if the initialization succeeds, any other value on
 * failure.
 **/
static int __devinit adapter_init(struct AdapterCtlBlk *acb,
	unsigned long io_port, u32 io_port_len, unsigned int irq)
{
	if (!request_region(io_port, io_port_len, DC395X_NAME)) {
		dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
		goto failed;
	}
	/* store port base to indicate we have registered it */
	acb->io_port_base = io_port;
	acb->io_port_len = io_port_len;
	
	if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
	    	/* release the region we just claimed */
		dprintkl(KERN_INFO, "Failed to register IRQ\n");
		goto failed;
	}
	/* store irq to indicate we have registered it */
	acb->irq_level = irq;

	/* get eeprom configuration information and command line settings etc */
	check_eeprom(&acb->eeprom, io_port);
 	print_eeprom_settings(&acb->eeprom);

	/* setup adapter control block */	
	adapter_init_params(acb);
	
	/* display card connectors/termination settings */
 	adapter_print_config(acb);

	if (adapter_sg_tables_alloc(acb)) {
		dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
		goto failed;
	}
	adapter_init_scsi_host(acb->scsi_host);
	adapter_init_chip(acb);
	set_basic_config(acb);

	dprintkdbg(DBG_0,
		"adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
		"size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
		acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
		sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
	return 0;

failed:
	if (acb->irq_level)
		free_irq(acb->irq_level, acb);
	if (acb->io_port_base)
		release_region(acb->io_port_base, acb->io_port_len);
	adapter_sg_tables_free(acb);

	return 1;
}


/**
 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
 * stopping all operations and disabling interrupt generation on the
 * card.
 *
 * @acb: The adapter which we are to shutdown.
 **/
static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
{
	/* disable interrupts */
	DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);

	/* reset the scsi bus */
	if (acb->config & HCC_SCSI_RESET)
		reset_scsi_bus(acb);

	/* clear any pending interupt state */
	DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
}



/**
 * adapter_uninit - Shut down the chip and release any resources that
 * we had allocated. Once this returns the adapter should not be used
 * anymore.
 *
 * @acb: The adapter which we are to un-initialize.
 **/
static void adapter_uninit(struct AdapterCtlBlk *acb)
{
	unsigned long flags;
	DC395x_LOCK_IO(acb->scsi_host, flags);

	/* remove timers */
	if (timer_pending(&acb->waiting_timer))
		del_timer(&acb->waiting_timer);
	if (timer_pending(&acb->selto_timer))
		del_timer(&acb->selto_timer);

	adapter_uninit_chip(acb);
	adapter_remove_and_free_all_devices(acb);
	DC395x_UNLOCK_IO(acb->scsi_host, flags);

	if (acb->irq_level)
		free_irq(acb->irq_level, acb);
	if (acb->io_port_base)
		release_region(acb->io_port_base, acb->io_port_len);

	adapter_sg_tables_free(acb);
}


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

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

static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
		char **start, off_t offset, int length, int inout)
{
	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
	int spd, spd1;
	char *pos = buffer;
	struct DeviceCtlBlk *dcb;
	unsigned long flags;
	int dev;

	if (inout)		/* Has data been written to the file ? */
		return -EPERM;

	SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
	SPRINTF(" Driver Version " DC395X_VERSION "\n");

	DC395x_LOCK_IO(acb->scsi_host, flags);

	SPRINTF("SCSI Host Nr %i, ", host->host_no);
	SPRINTF("DC395U/UW/F DC315/U %s\n",
		(acb->config & HCC_WIDE_CARD) ? "Wide" : "");
	SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
	SPRINTF("irq_level 0x%04x, ", acb->irq_level);
	SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);

	SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
	SPRINTF("AdapterID %i\n", host->this_id);

	SPRINTF("tag_max_num %i", acb->tag_max_num);
	/*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
	SPRINTF(", FilterCfg 0x%02x",
		DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
	SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
	/*SPRINTF("\n"); */

	SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
	SPRINTF
	    ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
	     acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
	     acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
	     acb->dcb_map[6], acb->dcb_map[7]);
	SPRINTF
	    ("                      %02x %02x %02x %02x %02x %02x %02x %02x\n",
	     acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
	     acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
	     acb->dcb_map[14], acb->dcb_map[15]);

	SPRINTF
	    ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");

	dev = 0;
	list_for_each_entry(dcb, &acb->dcb_list, list) {
		int nego_period;
		SPRINTF("%02i %02i  %02i ", dev, dcb->target_id,
			dcb->target_lun);
		YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
		YESNO(dcb->sync_offset);
		YESNO(dcb->sync_period & WIDE_SYNC);
		YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
		YESNO(dcb->dev_mode & NTC_DO_SEND_START);
		YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
		nego_period = clock_period[dcb->sync_period & 0x07] << 2;
		if (dcb->sync_offset)
			SPRINTF("  %03i ns ", nego_period);
		else
			SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));

		if (dcb->sync_offset & 0x0f) {
			spd = 1000 / (nego_period);
			spd1 = 1000 % (nego_period);
			spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
			SPRINTF("   %2i.%1i M     %02i ", spd, spd1,
				(dcb->sync_offset & 0x0f));
		} else
			SPRINTF("                 ");

		/* Add more info ... */
		SPRINTF("     %02i\n", dcb->max_command);
		dev++;
	}

	if (timer_pending(&acb->waiting_timer))
		SPRINTF("Waiting queue timer running\n");
	else
		SPRINTF("\n");

	list_for_each_entry(dcb, &acb->dcb_list, list) {
		struct ScsiReqBlk *srb;
		if (!list_empty(&dcb->srb_waiting_list))
			SPRINTF("DCB (%02i-%i): Waiting: %i:",
				dcb->target_id, dcb->target_lun,
				list_size(&dcb->srb_waiting_list));
                list_for_each_entry(srb, &dcb->srb_waiting_list, list)
			SPRINTF(" %li", srb->cmd->pid);
		if (!list_empty(&dcb->srb_going_list))
			SPRINTF("\nDCB (%02i-%i): Going  : %i:",
				dcb->target_id, dcb->target_lun,
				list_size(&dcb->srb_going_list));
		list_for_each_entry(srb, &dcb->srb_going_list, list)
			SPRINTF(" %li", srb->cmd->pid);
		if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
			SPRINTF("\n");
	}

	if (debug_enabled(DBG_1)) {
		SPRINTF("DCB list for ACB %p:\n", acb);
		list_for_each_entry(dcb, &acb->dcb_list, list) {
			SPRINTF("%p -> ", dcb);
		}
		SPRINTF("END\n");
	}

	*start = buffer + offset;
	DC395x_UNLOCK_IO(acb->scsi_host, flags);

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


static struct scsi_host_template dc395x_driver_template = {
	.module                 = THIS_MODULE,
	.proc_name              = DC395X_NAME,
	.proc_info              = dc395x_proc_info,
	.name                   = DC395X_BANNER " " DC395X_VERSION,
	.queuecommand           = dc395x_queue_command,
	.bios_param             = dc395x_bios_param,
	.slave_alloc            = dc395x_slave_alloc,
	.slave_destroy          = dc395x_slave_destroy,
	.can_queue              = DC395x_MAX_CAN_QUEUE,
	.this_id                = 7,
	.sg_tablesize           = DC395x_MAX_SG_TABLESIZE,
	.cmd_per_lun            = DC395x_MAX_CMD_PER_LUN,
	.eh_abort_handler       = dc395x_eh_abort,
	.eh_bus_reset_handler   = dc395x_eh_bus_reset,
	.unchecked_isa_dma      = 0,
	.use_clustering         = DISABLE_CLUSTERING,
};


/**
 * banner_display - Display banner on first instance of driver
 * initialized.
 **/
static void banner_display(void)
{
	static int banner_done = 0;
	if (!banner_done)
	{
		dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
		banner_done = 1;
	}
}


/**
 * dc395x_init_one - Initialise a single instance of the adapter.
 *
 * The PCI layer will call this once for each instance of the adapter
 * that it finds in the system. The pci_dev strcuture indicates which
 * instance we are being called from.
 * 
 * @dev: The PCI device to intialize.
 * @id: Looks like a pointer to the entry in our pci device table
 * that was actually matched by the PCI subsystem.
 *
 * Returns 0 on success, or an error code (-ve) on failure.
 **/
static int __devinit dc395x_init_one(struct pci_dev *dev,
		const struct pci_device_id *id)
{
	struct Scsi_Host *scsi_host = NULL;
	struct AdapterCtlBlk *acb = NULL;
	unsigned long io_port_base;
	unsigned int io_port_len;
	unsigned int irq;
	
	dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
	banner_display();

	if (pci_enable_device(dev))
	{
		dprintkl(KERN_INFO, "PCI Enable device failed.\n");
		return -ENODEV;
	}
	io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
	io_port_len = pci_resource_len(dev, 0);
	irq = dev->irq;
	dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);

	/* allocate scsi host information (includes out adapter) */
	scsi_host = scsi_host_alloc(&dc395x_driver_template,
				    sizeof(struct AdapterCtlBlk));
	if (!scsi_host) {
		dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
		goto fail;
	}
 	acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
 	acb->scsi_host = scsi_host;
 	acb->dev = dev;

	/* initialise the adapter and everything we need */
 	if (adapter_init(acb, io_port_base, io_port_len, irq)) {
		dprintkl(KERN_INFO, "adapter init failed\n");
		goto fail;
	}

	pci_set_master(dev);

	/* get the scsi mid level to scan for new devices on the bus */
	if (scsi_add_host(scsi_host, &dev->dev)) {
		dprintkl(KERN_ERR, "scsi_add_host failed\n");
		goto fail;
	}
	pci_set_drvdata(dev, scsi_host);
	scsi_scan_host(scsi_host);
        	
	return 0;

fail:
	if (acb != NULL)
		adapter_uninit(acb);
	if (scsi_host != NULL)
		scsi_host_put(scsi_host);
	pci_disable_device(dev);
	return -ENODEV;
}


/**
 * dc395x_remove_one - Called to remove a single instance of the
 * adapter.
 *
 * @dev: The PCI device to intialize.
 **/
static void __devexit dc395x_remove_one(struct pci_dev *dev)
{
	struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);

	dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);

	scsi_remove_host(scsi_host);
	adapter_uninit(acb);
	pci_disable_device(dev);
	scsi_host_put(scsi_host);
	pci_set_drvdata(dev, NULL);
}


static struct pci_device_id dc395x_pci_table[] = {
	{
		.vendor		= PCI_VENDOR_ID_TEKRAM,
		.device		= PCI_DEVICE_ID_TEKRAM_TRMS1040,
		.subvendor	= PCI_ANY_ID,
		.subdevice	= PCI_ANY_ID,
	 },
	{}			/* Terminating entry */
};
MODULE_DEVICE_TABLE(pci, dc395x_pci_table);


static struct pci_driver dc395x_driver = {
	.name           = DC395X_NAME,
	.id_table       = dc395x_pci_table,
	.probe          = dc395x_init_one,
	.remove         = __devexit_p(dc395x_remove_one),
};


/**
 * dc395x_module_init - Module initialization function
 *
 * Used by both module and built-in driver to initialise this driver.
 **/
static int __init dc395x_module_init(void)
{
	return pci_register_driver(&dc395x_driver);
}


/**
 * dc395x_module_exit - Module cleanup function.
 **/
static void __exit dc395x_module_exit(void)
{
	pci_unregister_driver(&dc395x_driver);
}


module_init(dc395x_module_init);
module_exit(dc395x_module_exit);

MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
MODULE_LICENSE("GPL");