aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/net/sunhme.c
blob: b22d3355fb45f7157328824390315fcf9013d372 (plain) (tree)
1
2
3
4
5
6
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
                                                                          


                                                                       
                                              
                                                                








                                                                             


















                              
                     
                         
                              





                          
                   

                            
                       

                         
                     
                      







                        



                   
                                

                                         
                                                               


                                                                        
 



                                                                             





                                                                          
 
































                                                                                        
                              






                                                                   
                                 





















































                                                                                        



















                                                                               
                                           
              
                                             



                                                                               
                                           
              
                                             

 
                                         
 
                               













                                                                              
                                                        
              
                                                          



                                                                              
                                                        
              
                                                          

 
                                        
 
                                         












                                                         
                                                                      
                                                    
                                                                         
                                                           
                                                                                
                                                              
                                                                                   







                                                     
                                                          
                
                                                            

                                                     
                                                          
                
                                                            
          
                                                                    
                                                 
                                                                   
                                                    
                                                                      
                                                           
                                                                                 
                                                              
                                                                                    






                                                     
                                                                
                
                                                                  

                                                     
                                                                
                
                                                                  
          



                                                                  
                                                 
                                                                   
                                                    
                                                                      
                                                           
                                                                                 
                                                              
                                                                                    



      










































































































































































                                                                                     
 




























































































































































































































































































































































































































































































































































































































































































































                                                                                                         
                                           














                                                                        

                                                                             
















                                                                                   



                                                                                     





































                                                                          
                                                              

                                                                                     

                                                                                       









































































































































































































































































































                                                                                          
                    





                                                            
                                  








                                                              
                                                         
                                                             
                                                   
                                                         


                                                                  














                                                                    
                         














































































                                                                                              




                                                               











































































                                                                                   
 




















































































































































































                                                                                            
                                                                                        












































































                                                                                       
                                                                                                    

                                                    
                                                                          

                                                                                       

                                                                                                   











                                                                          

                                                 
                                                                                             
                                                                            
                                                                                                








                                                                                       
                                                                       
                                                   




                                                         











                                                                                           
                                                              
 

                                                  


































                                                                           
                                                                





                                                            
                                                          











































                                                                               
                                                 








                                                                             
                                                                       
                                          

                                                                                        

















                                                                                    
                                                 



























                                                                           
                                                 
















                                                                             
                                                 



                              
                                                 

                                                                             























                                                                            
                                                                                     












                                                                          

                                                                                 






                                                                              


                                                                            






























                                                                                  
                                                 









                                                            
                                                 







                                               






























                                                                                     





                                                                            
                                                 











































                                                                            
                                                 






















                                                                                 
                                                 








                                                       





                                                               





                                               
                                                 







                                                                      
                                                   








                                                   




                                                            
                                                                            
 

                                                  
                           
 



                                       
 






                                                         
                                        

                                         

                                              











                                                                    
                                                       

                        
                                              
                                                         
                                                         






                                                                                         
 
                                        



                                                             
                                                       
 
                                          

         


                        
                                                                        





























                                                            
                                                                                
 
                                                    






                                  
                                           












                                                              
                                      














                                                                  
                
                                          







                                                                      

         
                              
 

                               



                                        



                                                

         

                                                                 
                         
                                                                             


                                         

                                                              
                           
                                                                             


                                     

                                                              
                           
                                                                             


                                     

                                                                      
                              
                                                                             


                                     

                                                                       
                           
                                                                           


                                     
                                                                    











                                                               



                                                                     
                                                                     
                                                         
                                                                      
 



                                                              
























                                                                             

                                                      
 
                               

                                               
                                                         


                                               













                                                                         
                                           

         
                                      
 






                                                                                        
                                       
 

                 




                                           


                      
                                                                       
                        
                                                                        
                        
                                                                        
                           
                                                                            
                        
                                                                         









                         
                    





























                                                                     
                                                                                                    





















                                                                    
                                 


                        
                 



                                                                               

                                                   
 


                              
 

                                                      
 






                                                                              
 






                                                 
                            
 

                                                                          

                                  
                   
                               









                                                    
                   

                                         







                                              




                                    














                                                                          






                                                
                              


                                   
                                 






                                                
         












                                                                                                 
                                                                












                                                                                  
                   
                                          

                        
                                     
                                               


                                                                               






                                                                     
 






                                                 
                   
                                                                    

                                                                 
















                                                                    
                   




                                                                
                                                                                        
























                                                                                

                                                      

                                               
                                                        


                                              
















                                                                              

                                        












                                                                                                                
                                                            









                                                                                               
                                       
 
















                                                 
 
                                                                 
 

                                                            
 

                                   

                                                            
                           
                                           



                                          
 
 
                                                   
                                                                       












                                                             
 
                                                    
 
 










                                                   
         
 
 

      
                  
                                                                                           
 
                                          
                                                               
                                           
 

                                                                
 
                                                     

 
                                                          
 
                                                          

                                             
                                   


                                         




                                                                    



                                           


                             
                                        
 


                 
                                                     












                                   
 
                                        
 





                                                       
 


                                            
 
                                                                 

                                             
 

                   
 



                                               
 







                                                    
 
      
 


                                        
 









                                               

         












                                        


                              
                             
/* sunhme.c: Sparc HME/BigMac 10/100baseT half/full duplex auto switching,
 *           auto carrier detecting ethernet driver.  Also known as the
 *           "Happy Meal Ethernet" found on SunSwift SBUS cards.
 *
 * Copyright (C) 1996, 1998, 1999, 2002, 2003,
 *		2006, 2008 David S. Miller (davem@davemloft.net)
 *
 * Changes :
 * 2000/11/11 Willy Tarreau <willy AT meta-x.org>
 *   - port to non-sparc architectures. Tested only on x86 and
 *     only currently works with QFE PCI cards.
 *   - ability to specify the MAC address at module load time by passing this
 *     argument : macaddr=0x00,0x10,0x20,0x30,0x40,0x50
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/crc32.h>
#include <linux/random.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/mm.h>
#include <linux/bitops.h>
#include <linux/dma-mapping.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>

#ifdef CONFIG_SPARC
#include <linux/of.h>
#include <linux/of_device.h>
#include <asm/idprom.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/auxio.h>
#endif
#include <asm/uaccess.h>

#include <asm/pgtable.h>
#include <asm/irq.h>

#ifdef CONFIG_PCI
#include <linux/pci.h>
#endif

#include "sunhme.h"

#define DRV_NAME	"sunhme"
#define DRV_VERSION	"3.10"
#define DRV_RELDATE	"August 26, 2008"
#define DRV_AUTHOR	"David S. Miller (davem@davemloft.net)"

static char version[] =
	DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";

MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_AUTHOR);
MODULE_DESCRIPTION("Sun HappyMealEthernet(HME) 10/100baseT ethernet driver");
MODULE_LICENSE("GPL");

static int macaddr[6];

/* accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */
module_param_array(macaddr, int, NULL, 0);
MODULE_PARM_DESC(macaddr, "Happy Meal MAC address to set");

#ifdef CONFIG_SBUS
static struct quattro *qfe_sbus_list;
#endif

#ifdef CONFIG_PCI
static struct quattro *qfe_pci_list;
#endif

#undef HMEDEBUG
#undef SXDEBUG
#undef RXDEBUG
#undef TXDEBUG
#undef TXLOGGING

#ifdef TXLOGGING
struct hme_tx_logent {
	unsigned int tstamp;
	int tx_new, tx_old;
	unsigned int action;
#define TXLOG_ACTION_IRQ	0x01
#define TXLOG_ACTION_TXMIT	0x02
#define TXLOG_ACTION_TBUSY	0x04
#define TXLOG_ACTION_NBUFS	0x08
	unsigned int status;
};
#define TX_LOG_LEN	128
static struct hme_tx_logent tx_log[TX_LOG_LEN];
static int txlog_cur_entry;
static __inline__ void tx_add_log(struct happy_meal *hp, unsigned int a, unsigned int s)
{
	struct hme_tx_logent *tlp;
	unsigned long flags;

	local_irq_save(flags);
	tlp = &tx_log[txlog_cur_entry];
	tlp->tstamp = (unsigned int)jiffies;
	tlp->tx_new = hp->tx_new;
	tlp->tx_old = hp->tx_old;
	tlp->action = a;
	tlp->status = s;
	txlog_cur_entry = (txlog_cur_entry + 1) & (TX_LOG_LEN - 1);
	local_irq_restore(flags);
}
static __inline__ void tx_dump_log(void)
{
	int i, this;

	this = txlog_cur_entry;
	for (i = 0; i < TX_LOG_LEN; i++) {
		printk("TXLOG[%d]: j[%08x] tx[N(%d)O(%d)] action[%08x] stat[%08x]\n", i,
		       tx_log[this].tstamp,
		       tx_log[this].tx_new, tx_log[this].tx_old,
		       tx_log[this].action, tx_log[this].status);
		this = (this + 1) & (TX_LOG_LEN - 1);
	}
}
static __inline__ void tx_dump_ring(struct happy_meal *hp)
{
	struct hmeal_init_block *hb = hp->happy_block;
	struct happy_meal_txd *tp = &hb->happy_meal_txd[0];
	int i;

	for (i = 0; i < TX_RING_SIZE; i+=4) {
		printk("TXD[%d..%d]: [%08x:%08x] [%08x:%08x] [%08x:%08x] [%08x:%08x]\n",
		       i, i + 4,
		       le32_to_cpu(tp[i].tx_flags), le32_to_cpu(tp[i].tx_addr),
		       le32_to_cpu(tp[i + 1].tx_flags), le32_to_cpu(tp[i + 1].tx_addr),
		       le32_to_cpu(tp[i + 2].tx_flags), le32_to_cpu(tp[i + 2].tx_addr),
		       le32_to_cpu(tp[i + 3].tx_flags), le32_to_cpu(tp[i + 3].tx_addr));
	}
}
#else
#define tx_add_log(hp, a, s)		do { } while(0)
#define tx_dump_log()			do { } while(0)
#define tx_dump_ring(hp)		do { } while(0)
#endif

#ifdef HMEDEBUG
#define HMD(x)  printk x
#else
#define HMD(x)
#endif

/* #define AUTO_SWITCH_DEBUG */

#ifdef AUTO_SWITCH_DEBUG
#define ASD(x)  printk x
#else
#define ASD(x)
#endif

#define DEFAULT_IPG0      16 /* For lance-mode only */
#define DEFAULT_IPG1       8 /* For all modes */
#define DEFAULT_IPG2       4 /* For all modes */
#define DEFAULT_JAMSIZE    4 /* Toe jam */

/* NOTE: In the descriptor writes one _must_ write the address
 *	 member _first_.  The card must not be allowed to see
 *	 the updated descriptor flags until the address is
 *	 correct.  I've added a write memory barrier between
 *	 the two stores so that I can sleep well at night... -DaveM
 */

#if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
static void sbus_hme_write32(void __iomem *reg, u32 val)
{
	sbus_writel(val, reg);
}

static u32 sbus_hme_read32(void __iomem *reg)
{
	return sbus_readl(reg);
}

static void sbus_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
{
	rxd->rx_addr = (__force hme32)addr;
	wmb();
	rxd->rx_flags = (__force hme32)flags;
}

static void sbus_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
{
	txd->tx_addr = (__force hme32)addr;
	wmb();
	txd->tx_flags = (__force hme32)flags;
}

static u32 sbus_hme_read_desc32(hme32 *p)
{
	return (__force u32)*p;
}

static void pci_hme_write32(void __iomem *reg, u32 val)
{
	writel(val, reg);
}

static u32 pci_hme_read32(void __iomem *reg)
{
	return readl(reg);
}

static void pci_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
{
	rxd->rx_addr = (__force hme32)cpu_to_le32(addr);
	wmb();
	rxd->rx_flags = (__force hme32)cpu_to_le32(flags);
}

static void pci_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
{
	txd->tx_addr = (__force hme32)cpu_to_le32(addr);
	wmb();
	txd->tx_flags = (__force hme32)cpu_to_le32(flags);
}

static u32 pci_hme_read_desc32(hme32 *p)
{
	return le32_to_cpup((__le32 *)p);
}

#define hme_write32(__hp, __reg, __val) \
	((__hp)->write32((__reg), (__val)))
#define hme_read32(__hp, __reg) \
	((__hp)->read32(__reg))
#define hme_write_rxd(__hp, __rxd, __flags, __addr) \
	((__hp)->write_rxd((__rxd), (__flags), (__addr)))
#define hme_write_txd(__hp, __txd, __flags, __addr) \
	((__hp)->write_txd((__txd), (__flags), (__addr)))
#define hme_read_desc32(__hp, __p) \
	((__hp)->read_desc32(__p))
#define hme_dma_map(__hp, __ptr, __size, __dir) \
	((__hp)->dma_map((__hp)->dma_dev, (__ptr), (__size), (__dir)))
#define hme_dma_unmap(__hp, __addr, __size, __dir) \
	((__hp)->dma_unmap((__hp)->dma_dev, (__addr), (__size), (__dir)))
#define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
	((__hp)->dma_sync_for_cpu((__hp)->dma_dev, (__addr), (__size), (__dir)))
#define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
	((__hp)->dma_sync_for_device((__hp)->dma_dev, (__addr), (__size), (__dir)))
#else
#ifdef CONFIG_SBUS
/* SBUS only compilation */
#define hme_write32(__hp, __reg, __val) \
	sbus_writel((__val), (__reg))
#define hme_read32(__hp, __reg) \
	sbus_readl(__reg)
#define hme_write_rxd(__hp, __rxd, __flags, __addr) \
do {	(__rxd)->rx_addr = (__force hme32)(u32)(__addr); \
	wmb(); \
	(__rxd)->rx_flags = (__force hme32)(u32)(__flags); \
} while(0)
#define hme_write_txd(__hp, __txd, __flags, __addr) \
do {	(__txd)->tx_addr = (__force hme32)(u32)(__addr); \
	wmb(); \
	(__txd)->tx_flags = (__force hme32)(u32)(__flags); \
} while(0)
#define hme_read_desc32(__hp, __p)	((__force u32)(hme32)*(__p))
#define hme_dma_map(__hp, __ptr, __size, __dir) \
	dma_map_single((__hp)->dma_dev, (__ptr), (__size), (__dir))
#define hme_dma_unmap(__hp, __addr, __size, __dir) \
	dma_unmap_single((__hp)->dma_dev, (__addr), (__size), (__dir))
#define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
	dma_dma_sync_single_for_cpu((__hp)->dma_dev, (__addr), (__size), (__dir))
#define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
	dma_dma_sync_single_for_device((__hp)->dma_dev, (__addr), (__size), (__dir))
#else
/* PCI only compilation */
#define hme_write32(__hp, __reg, __val) \
	writel((__val), (__reg))
#define hme_read32(__hp, __reg) \
	readl(__reg)
#define hme_write_rxd(__hp, __rxd, __flags, __addr) \
do {	(__rxd)->rx_addr = (__force hme32)cpu_to_le32(__addr); \
	wmb(); \
	(__rxd)->rx_flags = (__force hme32)cpu_to_le32(__flags); \
} while(0)
#define hme_write_txd(__hp, __txd, __flags, __addr) \
do {	(__txd)->tx_addr = (__force hme32)cpu_to_le32(__addr); \
	wmb(); \
	(__txd)->tx_flags = (__force hme32)cpu_to_le32(__flags); \
} while(0)
static inline u32 hme_read_desc32(struct happy_meal *hp, hme32 *p)
{
	return le32_to_cpup((__le32 *)p);
}
#define hme_dma_map(__hp, __ptr, __size, __dir) \
	pci_map_single((__hp)->dma_dev, (__ptr), (__size), (__dir))
#define hme_dma_unmap(__hp, __addr, __size, __dir) \
	pci_unmap_single((__hp)->dma_dev, (__addr), (__size), (__dir))
#define hme_dma_sync_for_cpu(__hp, __addr, __size, __dir) \
	pci_dma_sync_single_for_cpu((__hp)->dma_dev, (__addr), (__size), (__dir))
#define hme_dma_sync_for_device(__hp, __addr, __size, __dir) \
	pci_dma_sync_single_for_device((__hp)->dma_dev, (__addr), (__size), (__dir))
#endif
#endif


/* Oh yes, the MIF BitBang is mighty fun to program.  BitBucket is more like it. */
static void BB_PUT_BIT(struct happy_meal *hp, void __iomem *tregs, int bit)
{
	hme_write32(hp, tregs + TCVR_BBDATA, bit);
	hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
	hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
}

#if 0
static u32 BB_GET_BIT(struct happy_meal *hp, void __iomem *tregs, int internal)
{
	u32 ret;

	hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
	hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
	ret = hme_read32(hp, tregs + TCVR_CFG);
	if (internal)
		ret &= TCV_CFG_MDIO0;
	else
		ret &= TCV_CFG_MDIO1;

	return ret;
}
#endif

static u32 BB_GET_BIT2(struct happy_meal *hp, void __iomem *tregs, int internal)
{
	u32 retval;

	hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
	udelay(1);
	retval = hme_read32(hp, tregs + TCVR_CFG);
	if (internal)
		retval &= TCV_CFG_MDIO0;
	else
		retval &= TCV_CFG_MDIO1;
	hme_write32(hp, tregs + TCVR_BBCLOCK, 1);

	return retval;
}

#define TCVR_FAILURE      0x80000000     /* Impossible MIF read value */

static int happy_meal_bb_read(struct happy_meal *hp,
			      void __iomem *tregs, int reg)
{
	u32 tmp;
	int retval = 0;
	int i;

	ASD(("happy_meal_bb_read: reg=%d ", reg));

	/* Enable the MIF BitBang outputs. */
	hme_write32(hp, tregs + TCVR_BBOENAB, 1);

	/* Force BitBang into the idle state. */
	for (i = 0; i < 32; i++)
		BB_PUT_BIT(hp, tregs, 1);

	/* Give it the read sequence. */
	BB_PUT_BIT(hp, tregs, 0);
	BB_PUT_BIT(hp, tregs, 1);
	BB_PUT_BIT(hp, tregs, 1);
	BB_PUT_BIT(hp, tregs, 0);

	/* Give it the PHY address. */
	tmp = hp->paddr & 0xff;
	for (i = 4; i >= 0; i--)
		BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));

	/* Tell it what register we want to read. */
	tmp = (reg & 0xff);
	for (i = 4; i >= 0; i--)
		BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));

	/* Close down the MIF BitBang outputs. */
	hme_write32(hp, tregs + TCVR_BBOENAB, 0);

	/* Now read in the value. */
	(void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
	for (i = 15; i >= 0; i--)
		retval |= BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
	(void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
	(void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
	(void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
	ASD(("value=%x\n", retval));
	return retval;
}

static void happy_meal_bb_write(struct happy_meal *hp,
				void __iomem *tregs, int reg,
				unsigned short value)
{
	u32 tmp;
	int i;

	ASD(("happy_meal_bb_write: reg=%d value=%x\n", reg, value));

	/* Enable the MIF BitBang outputs. */
	hme_write32(hp, tregs + TCVR_BBOENAB, 1);

	/* Force BitBang into the idle state. */
	for (i = 0; i < 32; i++)
		BB_PUT_BIT(hp, tregs, 1);

	/* Give it write sequence. */
	BB_PUT_BIT(hp, tregs, 0);
	BB_PUT_BIT(hp, tregs, 1);
	BB_PUT_BIT(hp, tregs, 0);
	BB_PUT_BIT(hp, tregs, 1);

	/* Give it the PHY address. */
	tmp = (hp->paddr & 0xff);
	for (i = 4; i >= 0; i--)
		BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));

	/* Tell it what register we will be writing. */
	tmp = (reg & 0xff);
	for (i = 4; i >= 0; i--)
		BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));

	/* Tell it to become ready for the bits. */
	BB_PUT_BIT(hp, tregs, 1);
	BB_PUT_BIT(hp, tregs, 0);

	for (i = 15; i >= 0; i--)
		BB_PUT_BIT(hp, tregs, ((value >> i) & 1));

	/* Close down the MIF BitBang outputs. */
	hme_write32(hp, tregs + TCVR_BBOENAB, 0);
}

#define TCVR_READ_TRIES   16

static int happy_meal_tcvr_read(struct happy_meal *hp,
				void __iomem *tregs, int reg)
{
	int tries = TCVR_READ_TRIES;
	int retval;

	ASD(("happy_meal_tcvr_read: reg=0x%02x ", reg));
	if (hp->tcvr_type == none) {
		ASD(("no transceiver, value=TCVR_FAILURE\n"));
		return TCVR_FAILURE;
	}

	if (!(hp->happy_flags & HFLAG_FENABLE)) {
		ASD(("doing bit bang\n"));
		return happy_meal_bb_read(hp, tregs, reg);
	}

	hme_write32(hp, tregs + TCVR_FRAME,
		    (FRAME_READ | (hp->paddr << 23) | ((reg & 0xff) << 18)));
	while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
		udelay(20);
	if (!tries) {
		printk(KERN_ERR "happy meal: Aieee, transceiver MIF read bolixed\n");
		return TCVR_FAILURE;
	}
	retval = hme_read32(hp, tregs + TCVR_FRAME) & 0xffff;
	ASD(("value=%04x\n", retval));
	return retval;
}

#define TCVR_WRITE_TRIES  16

static void happy_meal_tcvr_write(struct happy_meal *hp,
				  void __iomem *tregs, int reg,
				  unsigned short value)
{
	int tries = TCVR_WRITE_TRIES;

	ASD(("happy_meal_tcvr_write: reg=0x%02x value=%04x\n", reg, value));

	/* Welcome to Sun Microsystems, can I take your order please? */
	if (!(hp->happy_flags & HFLAG_FENABLE)) {
		happy_meal_bb_write(hp, tregs, reg, value);
		return;
	}

	/* Would you like fries with that? */
	hme_write32(hp, tregs + TCVR_FRAME,
		    (FRAME_WRITE | (hp->paddr << 23) |
		     ((reg & 0xff) << 18) | (value & 0xffff)));
	while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
		udelay(20);

	/* Anything else? */
	if (!tries)
		printk(KERN_ERR "happy meal: Aieee, transceiver MIF write bolixed\n");

	/* Fifty-two cents is your change, have a nice day. */
}

/* Auto negotiation.  The scheme is very simple.  We have a timer routine
 * that keeps watching the auto negotiation process as it progresses.
 * The DP83840 is first told to start doing it's thing, we set up the time
 * and place the timer state machine in it's initial state.
 *
 * Here the timer peeks at the DP83840 status registers at each click to see
 * if the auto negotiation has completed, we assume here that the DP83840 PHY
 * will time out at some point and just tell us what (didn't) happen.  For
 * complete coverage we only allow so many of the ticks at this level to run,
 * when this has expired we print a warning message and try another strategy.
 * This "other" strategy is to force the interface into various speed/duplex
 * configurations and we stop when we see a link-up condition before the
 * maximum number of "peek" ticks have occurred.
 *
 * Once a valid link status has been detected we configure the BigMAC and
 * the rest of the Happy Meal to speak the most efficient protocol we could
 * get a clean link for.  The priority for link configurations, highest first
 * is:
 *                 100 Base-T Full Duplex
 *                 100 Base-T Half Duplex
 *                 10 Base-T Full Duplex
 *                 10 Base-T Half Duplex
 *
 * We start a new timer now, after a successful auto negotiation status has
 * been detected.  This timer just waits for the link-up bit to get set in
 * the BMCR of the DP83840.  When this occurs we print a kernel log message
 * describing the link type in use and the fact that it is up.
 *
 * If a fatal error of some sort is signalled and detected in the interrupt
 * service routine, and the chip is reset, or the link is ifconfig'd down
 * and then back up, this entire process repeats itself all over again.
 */
static int try_next_permutation(struct happy_meal *hp, void __iomem *tregs)
{
	hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);

	/* Downgrade from full to half duplex.  Only possible
	 * via ethtool.
	 */
	if (hp->sw_bmcr & BMCR_FULLDPLX) {
		hp->sw_bmcr &= ~(BMCR_FULLDPLX);
		happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
		return 0;
	}

	/* Downgrade from 100 to 10. */
	if (hp->sw_bmcr & BMCR_SPEED100) {
		hp->sw_bmcr &= ~(BMCR_SPEED100);
		happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
		return 0;
	}

	/* We've tried everything. */
	return -1;
}

static void display_link_mode(struct happy_meal *hp, void __iomem *tregs)
{
	printk(KERN_INFO "%s: Link is up using ", hp->dev->name);
	if (hp->tcvr_type == external)
		printk("external ");
	else
		printk("internal ");
	printk("transceiver at ");
	hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
	if (hp->sw_lpa & (LPA_100HALF | LPA_100FULL)) {
		if (hp->sw_lpa & LPA_100FULL)
			printk("100Mb/s, Full Duplex.\n");
		else
			printk("100Mb/s, Half Duplex.\n");
	} else {
		if (hp->sw_lpa & LPA_10FULL)
			printk("10Mb/s, Full Duplex.\n");
		else
			printk("10Mb/s, Half Duplex.\n");
	}
}

static void display_forced_link_mode(struct happy_meal *hp, void __iomem *tregs)
{
	printk(KERN_INFO "%s: Link has been forced up using ", hp->dev->name);
	if (hp->tcvr_type == external)
		printk("external ");
	else
		printk("internal ");
	printk("transceiver at ");
	hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
	if (hp->sw_bmcr & BMCR_SPEED100)
		printk("100Mb/s, ");
	else
		printk("10Mb/s, ");
	if (hp->sw_bmcr & BMCR_FULLDPLX)
		printk("Full Duplex.\n");
	else
		printk("Half Duplex.\n");
}

static int set_happy_link_modes(struct happy_meal *hp, void __iomem *tregs)
{
	int full;

	/* All we care about is making sure the bigmac tx_cfg has a
	 * proper duplex setting.
	 */
	if (hp->timer_state == arbwait) {
		hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
		if (!(hp->sw_lpa & (LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL)))
			goto no_response;
		if (hp->sw_lpa & LPA_100FULL)
			full = 1;
		else if (hp->sw_lpa & LPA_100HALF)
			full = 0;
		else if (hp->sw_lpa & LPA_10FULL)
			full = 1;
		else
			full = 0;
	} else {
		/* Forcing a link mode. */
		hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
		if (hp->sw_bmcr & BMCR_FULLDPLX)
			full = 1;
		else
			full = 0;
	}

	/* Before changing other bits in the tx_cfg register, and in
	 * general any of other the TX config registers too, you
	 * must:
	 * 1) Clear Enable
	 * 2) Poll with reads until that bit reads back as zero
	 * 3) Make TX configuration changes
	 * 4) Set Enable once more
	 */
	hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
		    hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
		    ~(BIGMAC_TXCFG_ENABLE));
	while (hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) & BIGMAC_TXCFG_ENABLE)
		barrier();
	if (full) {
		hp->happy_flags |= HFLAG_FULL;
		hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
			    hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
			    BIGMAC_TXCFG_FULLDPLX);
	} else {
		hp->happy_flags &= ~(HFLAG_FULL);
		hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
			    hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
			    ~(BIGMAC_TXCFG_FULLDPLX));
	}
	hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
		    hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
		    BIGMAC_TXCFG_ENABLE);
	return 0;
no_response:
	return 1;
}

static int happy_meal_init(struct happy_meal *hp);

static int is_lucent_phy(struct happy_meal *hp)
{
	void __iomem *tregs = hp->tcvregs;
	unsigned short mr2, mr3;
	int ret = 0;

	mr2 = happy_meal_tcvr_read(hp, tregs, 2);
	mr3 = happy_meal_tcvr_read(hp, tregs, 3);
	if ((mr2 & 0xffff) == 0x0180 &&
	    ((mr3 & 0xffff) >> 10) == 0x1d)
		ret = 1;

	return ret;
}

static void happy_meal_timer(unsigned long data)
{
	struct happy_meal *hp = (struct happy_meal *) data;
	void __iomem *tregs = hp->tcvregs;
	int restart_timer = 0;

	spin_lock_irq(&hp->happy_lock);

	hp->timer_ticks++;
	switch(hp->timer_state) {
	case arbwait:
		/* Only allow for 5 ticks, thats 10 seconds and much too
		 * long to wait for arbitration to complete.
		 */
		if (hp->timer_ticks >= 10) {
			/* Enter force mode. */
	do_force_mode:
			hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
			printk(KERN_NOTICE "%s: Auto-Negotiation unsuccessful, trying force link mode\n",
			       hp->dev->name);
			hp->sw_bmcr = BMCR_SPEED100;
			happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);

			if (!is_lucent_phy(hp)) {
				/* OK, seems we need do disable the transceiver for the first
				 * tick to make sure we get an accurate link state at the
				 * second tick.
				 */
				hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
				hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
				happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG, hp->sw_csconfig);
			}
			hp->timer_state = ltrywait;
			hp->timer_ticks = 0;
			restart_timer = 1;
		} else {
			/* Anything interesting happen? */
			hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
			if (hp->sw_bmsr & BMSR_ANEGCOMPLETE) {
				int ret;

				/* Just what we've been waiting for... */
				ret = set_happy_link_modes(hp, tregs);
				if (ret) {
					/* Ooops, something bad happened, go to force
					 * mode.
					 *
					 * XXX Broken hubs which don't support 802.3u
					 * XXX auto-negotiation make this happen as well.
					 */
					goto do_force_mode;
				}

				/* Success, at least so far, advance our state engine. */
				hp->timer_state = lupwait;
				restart_timer = 1;
			} else {
				restart_timer = 1;
			}
		}
		break;

	case lupwait:
		/* Auto negotiation was successful and we are awaiting a
		 * link up status.  I have decided to let this timer run
		 * forever until some sort of error is signalled, reporting
		 * a message to the user at 10 second intervals.
		 */
		hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
		if (hp->sw_bmsr & BMSR_LSTATUS) {
			/* Wheee, it's up, display the link mode in use and put
			 * the timer to sleep.
			 */
			display_link_mode(hp, tregs);
			hp->timer_state = asleep;
			restart_timer = 0;
		} else {
			if (hp->timer_ticks >= 10) {
				printk(KERN_NOTICE "%s: Auto negotiation successful, link still "
				       "not completely up.\n", hp->dev->name);
				hp->timer_ticks = 0;
				restart_timer = 1;
			} else {
				restart_timer = 1;
			}
		}
		break;

	case ltrywait:
		/* Making the timeout here too long can make it take
		 * annoyingly long to attempt all of the link mode
		 * permutations, but then again this is essentially
		 * error recovery code for the most part.
		 */
		hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
		hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
		if (hp->timer_ticks == 1) {
			if (!is_lucent_phy(hp)) {
				/* Re-enable transceiver, we'll re-enable the transceiver next
				 * tick, then check link state on the following tick.
				 */
				hp->sw_csconfig |= CSCONFIG_TCVDISAB;
				happy_meal_tcvr_write(hp, tregs,
						      DP83840_CSCONFIG, hp->sw_csconfig);
			}
			restart_timer = 1;
			break;
		}
		if (hp->timer_ticks == 2) {
			if (!is_lucent_phy(hp)) {
				hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
				happy_meal_tcvr_write(hp, tregs,
						      DP83840_CSCONFIG, hp->sw_csconfig);
			}
			restart_timer = 1;
			break;
		}
		if (hp->sw_bmsr & BMSR_LSTATUS) {
			/* Force mode selection success. */
			display_forced_link_mode(hp, tregs);
			set_happy_link_modes(hp, tregs); /* XXX error? then what? */
			hp->timer_state = asleep;
			restart_timer = 0;
		} else {
			if (hp->timer_ticks >= 4) { /* 6 seconds or so... */
				int ret;

				ret = try_next_permutation(hp, tregs);
				if (ret == -1) {
					/* Aieee, tried them all, reset the
					 * chip and try all over again.
					 */

					/* Let the user know... */
					printk(KERN_NOTICE "%s: Link down, cable problem?\n",
					       hp->dev->name);

					ret = happy_meal_init(hp);
					if (ret) {
						/* ho hum... */
						printk(KERN_ERR "%s: Error, cannot re-init the "
						       "Happy Meal.\n", hp->dev->name);
					}
					goto out;
				}
				if (!is_lucent_phy(hp)) {
					hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
									       DP83840_CSCONFIG);
					hp->sw_csconfig |= CSCONFIG_TCVDISAB;
					happy_meal_tcvr_write(hp, tregs,
							      DP83840_CSCONFIG, hp->sw_csconfig);
				}
				hp->timer_ticks = 0;
				restart_timer = 1;
			} else {
				restart_timer = 1;
			}
		}
		break;

	case asleep:
	default:
		/* Can't happens.... */
		printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
		       hp->dev->name);
		restart_timer = 0;
		hp->timer_ticks = 0;
		hp->timer_state = asleep; /* foo on you */
		break;
	};

	if (restart_timer) {
		hp->happy_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
		add_timer(&hp->happy_timer);
	}

out:
	spin_unlock_irq(&hp->happy_lock);
}

#define TX_RESET_TRIES     32
#define RX_RESET_TRIES     32

/* hp->happy_lock must be held */
static void happy_meal_tx_reset(struct happy_meal *hp, void __iomem *bregs)
{
	int tries = TX_RESET_TRIES;

	HMD(("happy_meal_tx_reset: reset, "));

	/* Would you like to try our SMCC Delux? */
	hme_write32(hp, bregs + BMAC_TXSWRESET, 0);
	while ((hme_read32(hp, bregs + BMAC_TXSWRESET) & 1) && --tries)
		udelay(20);

	/* Lettuce, tomato, buggy hardware (no extra charge)? */
	if (!tries)
		printk(KERN_ERR "happy meal: Transceiver BigMac ATTACK!");

	/* Take care. */
	HMD(("done\n"));
}

/* hp->happy_lock must be held */
static void happy_meal_rx_reset(struct happy_meal *hp, void __iomem *bregs)
{
	int tries = RX_RESET_TRIES;

	HMD(("happy_meal_rx_reset: reset, "));

	/* We have a special on GNU/Viking hardware bugs today. */
	hme_write32(hp, bregs + BMAC_RXSWRESET, 0);
	while ((hme_read32(hp, bregs + BMAC_RXSWRESET) & 1) && --tries)
		udelay(20);

	/* Will that be all? */
	if (!tries)
		printk(KERN_ERR "happy meal: Receiver BigMac ATTACK!");

	/* Don't forget your vik_1137125_wa.  Have a nice day. */
	HMD(("done\n"));
}

#define STOP_TRIES         16

/* hp->happy_lock must be held */
static void happy_meal_stop(struct happy_meal *hp, void __iomem *gregs)
{
	int tries = STOP_TRIES;

	HMD(("happy_meal_stop: reset, "));

	/* We're consolidating our STB products, it's your lucky day. */
	hme_write32(hp, gregs + GREG_SWRESET, GREG_RESET_ALL);
	while (hme_read32(hp, gregs + GREG_SWRESET) && --tries)
		udelay(20);

	/* Come back next week when we are "Sun Microelectronics". */
	if (!tries)
		printk(KERN_ERR "happy meal: Fry guys.");

	/* Remember: "Different name, same old buggy as shit hardware." */
	HMD(("done\n"));
}

/* hp->happy_lock must be held */
static void happy_meal_get_counters(struct happy_meal *hp, void __iomem *bregs)
{
	struct net_device_stats *stats = &hp->net_stats;

	stats->rx_crc_errors += hme_read32(hp, bregs + BMAC_RCRCECTR);
	hme_write32(hp, bregs + BMAC_RCRCECTR, 0);

	stats->rx_frame_errors += hme_read32(hp, bregs + BMAC_UNALECTR);
	hme_write32(hp, bregs + BMAC_UNALECTR, 0);

	stats->rx_length_errors += hme_read32(hp, bregs + BMAC_GLECTR);
	hme_write32(hp, bregs + BMAC_GLECTR, 0);

	stats->tx_aborted_errors += hme_read32(hp, bregs + BMAC_EXCTR);

	stats->collisions +=
		(hme_read32(hp, bregs + BMAC_EXCTR) +
		 hme_read32(hp, bregs + BMAC_LTCTR));
	hme_write32(hp, bregs + BMAC_EXCTR, 0);
	hme_write32(hp, bregs + BMAC_LTCTR, 0);
}

/* hp->happy_lock must be held */
static void happy_meal_poll_stop(struct happy_meal *hp, void __iomem *tregs)
{
	ASD(("happy_meal_poll_stop: "));

	/* If polling disabled or not polling already, nothing to do. */
	if ((hp->happy_flags & (HFLAG_POLLENABLE | HFLAG_POLL)) !=
	   (HFLAG_POLLENABLE | HFLAG_POLL)) {
		HMD(("not polling, return\n"));
		return;
	}

	/* Shut up the MIF. */
	ASD(("were polling, mif ints off, "));
	hme_write32(hp, tregs + TCVR_IMASK, 0xffff);

	/* Turn off polling. */
	ASD(("polling off, "));
	hme_write32(hp, tregs + TCVR_CFG,
		    hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_PENABLE));

	/* We are no longer polling. */
	hp->happy_flags &= ~(HFLAG_POLL);

	/* Let the bits set. */
	udelay(200);
	ASD(("done\n"));
}

/* Only Sun can take such nice parts and fuck up the programming interface
 * like this.  Good job guys...
 */
#define TCVR_RESET_TRIES       16 /* It should reset quickly        */
#define TCVR_UNISOLATE_TRIES   32 /* Dis-isolation can take longer. */

/* hp->happy_lock must be held */
static int happy_meal_tcvr_reset(struct happy_meal *hp, void __iomem *tregs)
{
	u32 tconfig;
	int result, tries = TCVR_RESET_TRIES;

	tconfig = hme_read32(hp, tregs + TCVR_CFG);
	ASD(("happy_meal_tcvr_reset: tcfg<%08lx> ", tconfig));
	if (hp->tcvr_type == external) {
		ASD(("external<"));
		hme_write32(hp, tregs + TCVR_CFG, tconfig & ~(TCV_CFG_PSELECT));
		hp->tcvr_type = internal;
		hp->paddr = TCV_PADDR_ITX;
		ASD(("ISOLATE,"));
		happy_meal_tcvr_write(hp, tregs, MII_BMCR,
				      (BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
		result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
		if (result == TCVR_FAILURE) {
			ASD(("phyread_fail>\n"));
			return -1;
		}
		ASD(("phyread_ok,PSELECT>"));
		hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
		hp->tcvr_type = external;
		hp->paddr = TCV_PADDR_ETX;
	} else {
		if (tconfig & TCV_CFG_MDIO1) {
			ASD(("internal<PSELECT,"));
			hme_write32(hp, tregs + TCVR_CFG, (tconfig | TCV_CFG_PSELECT));
			ASD(("ISOLATE,"));
			happy_meal_tcvr_write(hp, tregs, MII_BMCR,
					      (BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
			result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
			if (result == TCVR_FAILURE) {
				ASD(("phyread_fail>\n"));
				return -1;
			}
			ASD(("phyread_ok,~PSELECT>"));
			hme_write32(hp, tregs + TCVR_CFG, (tconfig & ~(TCV_CFG_PSELECT)));
			hp->tcvr_type = internal;
			hp->paddr = TCV_PADDR_ITX;
		}
	}

	ASD(("BMCR_RESET "));
	happy_meal_tcvr_write(hp, tregs, MII_BMCR, BMCR_RESET);

	while (--tries) {
		result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
		if (result == TCVR_FAILURE)
			return -1;
		hp->sw_bmcr = result;
		if (!(result & BMCR_RESET))
			break;
		udelay(20);
	}
	if (!tries) {
		ASD(("BMCR RESET FAILED!\n"));
		return -1;
	}
	ASD(("RESET_OK\n"));

	/* Get fresh copies of the PHY registers. */
	hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
	hp->sw_physid1   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
	hp->sw_physid2   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
	hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);

	ASD(("UNISOLATE"));
	hp->sw_bmcr &= ~(BMCR_ISOLATE);
	happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);

	tries = TCVR_UNISOLATE_TRIES;
	while (--tries) {
		result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
		if (result == TCVR_FAILURE)
			return -1;
		if (!(result & BMCR_ISOLATE))
			break;
		udelay(20);
	}
	if (!tries) {
		ASD((" FAILED!\n"));
		return -1;
	}
	ASD((" SUCCESS and CSCONFIG_DFBYPASS\n"));
	if (!is_lucent_phy(hp)) {
		result = happy_meal_tcvr_read(hp, tregs,
					      DP83840_CSCONFIG);
		happy_meal_tcvr_write(hp, tregs,
				      DP83840_CSCONFIG, (result | CSCONFIG_DFBYPASS));
	}
	return 0;
}

/* Figure out whether we have an internal or external transceiver.
 *
 * hp->happy_lock must be held
 */
static void happy_meal_transceiver_check(struct happy_meal *hp, void __iomem *tregs)
{
	unsigned long tconfig = hme_read32(hp, tregs + TCVR_CFG);

	ASD(("happy_meal_transceiver_check: tcfg=%08lx ", tconfig));
	if (hp->happy_flags & HFLAG_POLL) {
		/* If we are polling, we must stop to get the transceiver type. */
		ASD(("<polling> "));
		if (hp->tcvr_type == internal) {
			if (tconfig & TCV_CFG_MDIO1) {
				ASD(("<internal> <poll stop> "));
				happy_meal_poll_stop(hp, tregs);
				hp->paddr = TCV_PADDR_ETX;
				hp->tcvr_type = external;
				ASD(("<external>\n"));
				tconfig &= ~(TCV_CFG_PENABLE);
				tconfig |= TCV_CFG_PSELECT;
				hme_write32(hp, tregs + TCVR_CFG, tconfig);
			}
		} else {
			if (hp->tcvr_type == external) {
				ASD(("<external> "));
				if (!(hme_read32(hp, tregs + TCVR_STATUS) >> 16)) {
					ASD(("<poll stop> "));
					happy_meal_poll_stop(hp, tregs);
					hp->paddr = TCV_PADDR_ITX;
					hp->tcvr_type = internal;
					ASD(("<internal>\n"));
					hme_write32(hp, tregs + TCVR_CFG,
						    hme_read32(hp, tregs + TCVR_CFG) &
						    ~(TCV_CFG_PSELECT));
				}
				ASD(("\n"));
			} else {
				ASD(("<none>\n"));
			}
		}
	} else {
		u32 reread = hme_read32(hp, tregs + TCVR_CFG);

		/* Else we can just work off of the MDIO bits. */
		ASD(("<not polling> "));
		if (reread & TCV_CFG_MDIO1) {
			hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
			hp->paddr = TCV_PADDR_ETX;
			hp->tcvr_type = external;
			ASD(("<external>\n"));
		} else {
			if (reread & TCV_CFG_MDIO0) {
				hme_write32(hp, tregs + TCVR_CFG,
					    tconfig & ~(TCV_CFG_PSELECT));
				hp->paddr = TCV_PADDR_ITX;
				hp->tcvr_type = internal;
				ASD(("<internal>\n"));
			} else {
				printk(KERN_ERR "happy meal: Transceiver and a coke please.");
				hp->tcvr_type = none; /* Grrr... */
				ASD(("<none>\n"));
			}
		}
	}
}

/* The receive ring buffers are a bit tricky to get right.  Here goes...
 *
 * The buffers we dma into must be 64 byte aligned.  So we use a special
 * alloc_skb() routine for the happy meal to allocate 64 bytes more than
 * we really need.
 *
 * We use skb_reserve() to align the data block we get in the skb.  We
 * also program the etxregs->cfg register to use an offset of 2.  This
 * imperical constant plus the ethernet header size will always leave
 * us with a nicely aligned ip header once we pass things up to the
 * protocol layers.
 *
 * The numbers work out to:
 *
 *         Max ethernet frame size         1518
 *         Ethernet header size              14
 *         Happy Meal base offset             2
 *
 * Say a skb data area is at 0xf001b010, and its size alloced is
 * (ETH_FRAME_LEN + 64 + 2) = (1514 + 64 + 2) = 1580 bytes.
 *
 * First our alloc_skb() routine aligns the data base to a 64 byte
 * boundary.  We now have 0xf001b040 as our skb data address.  We
 * plug this into the receive descriptor address.
 *
 * Next, we skb_reserve() 2 bytes to account for the Happy Meal offset.
 * So now the data we will end up looking at starts at 0xf001b042.  When
 * the packet arrives, we will check out the size received and subtract
 * this from the skb->length.  Then we just pass the packet up to the
 * protocols as is, and allocate a new skb to replace this slot we have
 * just received from.
 *
 * The ethernet layer will strip the ether header from the front of the
 * skb we just sent to it, this leaves us with the ip header sitting
 * nicely aligned at 0xf001b050.  Also, for tcp and udp packets the
 * Happy Meal has even checksummed the tcp/udp data for us.  The 16
 * bit checksum is obtained from the low bits of the receive descriptor
 * flags, thus:
 *
 * 	skb->csum = rxd->rx_flags & 0xffff;
 * 	skb->ip_summed = CHECKSUM_COMPLETE;
 *
 * before sending off the skb to the protocols, and we are good as gold.
 */
static void happy_meal_clean_rings(struct happy_meal *hp)
{
	int i;

	for (i = 0; i < RX_RING_SIZE; i++) {
		if (hp->rx_skbs[i] != NULL) {
			struct sk_buff *skb = hp->rx_skbs[i];
			struct happy_meal_rxd *rxd;
			u32 dma_addr;

			rxd = &hp->happy_block->happy_meal_rxd[i];
			dma_addr = hme_read_desc32(hp, &rxd->rx_addr);
			dma_unmap_single(hp->dma_dev, dma_addr,
					 RX_BUF_ALLOC_SIZE, DMA_FROM_DEVICE);
			dev_kfree_skb_any(skb);
			hp->rx_skbs[i] = NULL;
		}
	}

	for (i = 0; i < TX_RING_SIZE; i++) {
		if (hp->tx_skbs[i] != NULL) {
			struct sk_buff *skb = hp->tx_skbs[i];
			struct happy_meal_txd *txd;
			u32 dma_addr;
			int frag;

			hp->tx_skbs[i] = NULL;

			for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
				txd = &hp->happy_block->happy_meal_txd[i];
				dma_addr = hme_read_desc32(hp, &txd->tx_addr);
				dma_unmap_single(hp->dma_dev, dma_addr,
						 (hme_read_desc32(hp, &txd->tx_flags)
						  & TXFLAG_SIZE),
						 DMA_TO_DEVICE);

				if (frag != skb_shinfo(skb)->nr_frags)
					i++;
			}

			dev_kfree_skb_any(skb);
		}
	}
}

/* hp->happy_lock must be held */
static void happy_meal_init_rings(struct happy_meal *hp)
{
	struct hmeal_init_block *hb = hp->happy_block;
	struct net_device *dev = hp->dev;
	int i;

	HMD(("happy_meal_init_rings: counters to zero, "));
	hp->rx_new = hp->rx_old = hp->tx_new = hp->tx_old = 0;

	/* Free any skippy bufs left around in the rings. */
	HMD(("clean, "));
	happy_meal_clean_rings(hp);

	/* Now get new skippy bufs for the receive ring. */
	HMD(("init rxring, "));
	for (i = 0; i < RX_RING_SIZE; i++) {
		struct sk_buff *skb;

		skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
		if (!skb) {
			hme_write_rxd(hp, &hb->happy_meal_rxd[i], 0, 0);
			continue;
		}
		hp->rx_skbs[i] = skb;
		skb->dev = dev;

		/* Because we reserve afterwards. */
		skb_put(skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
		hme_write_rxd(hp, &hb->happy_meal_rxd[i],
			      (RXFLAG_OWN | ((RX_BUF_ALLOC_SIZE - RX_OFFSET) << 16)),
			      dma_map_single(hp->dma_dev, skb->data, RX_BUF_ALLOC_SIZE,
					     DMA_FROM_DEVICE));
		skb_reserve(skb, RX_OFFSET);
	}

	HMD(("init txring, "));
	for (i = 0; i < TX_RING_SIZE; i++)
		hme_write_txd(hp, &hb->happy_meal_txd[i], 0, 0);

	HMD(("done\n"));
}

/* hp->happy_lock must be held */
static void happy_meal_begin_auto_negotiation(struct happy_meal *hp,
					      void __iomem *tregs,
					      struct ethtool_cmd *ep)
{
	int timeout;

	/* Read all of the registers we are interested in now. */
	hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
	hp->sw_bmcr      = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
	hp->sw_physid1   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
	hp->sw_physid2   = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);

	/* XXX Check BMSR_ANEGCAPABLE, should not be necessary though. */

	hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
	if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
		/* Advertise everything we can support. */
		if (hp->sw_bmsr & BMSR_10HALF)
			hp->sw_advertise |= (ADVERTISE_10HALF);
		else
			hp->sw_advertise &= ~(ADVERTISE_10HALF);

		if (hp->sw_bmsr & BMSR_10FULL)
			hp->sw_advertise |= (ADVERTISE_10FULL);
		else
			hp->sw_advertise &= ~(ADVERTISE_10FULL);
		if (hp->sw_bmsr & BMSR_100HALF)
			hp->sw_advertise |= (ADVERTISE_100HALF);
		else
			hp->sw_advertise &= ~(ADVERTISE_100HALF);
		if (hp->sw_bmsr & BMSR_100FULL)
			hp->sw_advertise |= (ADVERTISE_100FULL);
		else
			hp->sw_advertise &= ~(ADVERTISE_100FULL);
		happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);

		/* XXX Currently no Happy Meal cards I know off support 100BaseT4,
		 * XXX and this is because the DP83840 does not support it, changes
		 * XXX would need to be made to the tx/rx logic in the driver as well
		 * XXX so I completely skip checking for it in the BMSR for now.
		 */

#ifdef AUTO_SWITCH_DEBUG
		ASD(("%s: Advertising [ ", hp->dev->name));
		if (hp->sw_advertise & ADVERTISE_10HALF)
			ASD(("10H "));
		if (hp->sw_advertise & ADVERTISE_10FULL)
			ASD(("10F "));
		if (hp->sw_advertise & ADVERTISE_100HALF)
			ASD(("100H "));
		if (hp->sw_advertise & ADVERTISE_100FULL)
			ASD(("100F "));
#endif

		/* Enable Auto-Negotiation, this is usually on already... */
		hp->sw_bmcr |= BMCR_ANENABLE;
		happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);

		/* Restart it to make sure it is going. */
		hp->sw_bmcr |= BMCR_ANRESTART;
		happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);

		/* BMCR_ANRESTART self clears when the process has begun. */

		timeout = 64;  /* More than enough. */
		while (--timeout) {
			hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
			if (!(hp->sw_bmcr & BMCR_ANRESTART))
				break; /* got it. */
			udelay(10);
		}
		if (!timeout) {
			printk(KERN_ERR "%s: Happy Meal would not start auto negotiation "
			       "BMCR=0x%04x\n", hp->dev->name, hp->sw_bmcr);
			printk(KERN_NOTICE "%s: Performing force link detection.\n",
			       hp->dev->name);
			goto force_link;
		} else {
			hp->timer_state = arbwait;
		}
	} else {
force_link:
		/* Force the link up, trying first a particular mode.
		 * Either we are here at the request of ethtool or
		 * because the Happy Meal would not start to autoneg.
		 */

		/* Disable auto-negotiation in BMCR, enable the duplex and
		 * speed setting, init the timer state machine, and fire it off.
		 */
		if (ep == NULL || ep->autoneg == AUTONEG_ENABLE) {
			hp->sw_bmcr = BMCR_SPEED100;
		} else {
			if (ep->speed == SPEED_100)
				hp->sw_bmcr = BMCR_SPEED100;
			else
				hp->sw_bmcr = 0;
			if (ep->duplex == DUPLEX_FULL)
				hp->sw_bmcr |= BMCR_FULLDPLX;
		}
		happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);

		if (!is_lucent_phy(hp)) {
			/* OK, seems we need do disable the transceiver for the first
			 * tick to make sure we get an accurate link state at the
			 * second tick.
			 */
			hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
							       DP83840_CSCONFIG);
			hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
			happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG,
					      hp->sw_csconfig);
		}
		hp->timer_state = ltrywait;
	}

	hp->timer_ticks = 0;
	hp->happy_timer.expires = jiffies + (12 * HZ)/10;  /* 1.2 sec. */
	hp->happy_timer.data = (unsigned long) hp;
	hp->happy_timer.function = &happy_meal_timer;
	add_timer(&hp->happy_timer);
}

/* hp->happy_lock must be held */
static int happy_meal_init(struct happy_meal *hp)
{
	void __iomem *gregs        = hp->gregs;
	void __iomem *etxregs      = hp->etxregs;
	void __iomem *erxregs      = hp->erxregs;
	void __iomem *bregs        = hp->bigmacregs;
	void __iomem *tregs        = hp->tcvregs;
	u32 regtmp, rxcfg;
	unsigned char *e = &hp->dev->dev_addr[0];

	/* If auto-negotiation timer is running, kill it. */
	del_timer(&hp->happy_timer);

	HMD(("happy_meal_init: happy_flags[%08x] ",
	     hp->happy_flags));
	if (!(hp->happy_flags & HFLAG_INIT)) {
		HMD(("set HFLAG_INIT, "));
		hp->happy_flags |= HFLAG_INIT;
		happy_meal_get_counters(hp, bregs);
	}

	/* Stop polling. */
	HMD(("to happy_meal_poll_stop\n"));
	happy_meal_poll_stop(hp, tregs);

	/* Stop transmitter and receiver. */
	HMD(("happy_meal_init: to happy_meal_stop\n"));
	happy_meal_stop(hp, gregs);

	/* Alloc and reset the tx/rx descriptor chains. */
	HMD(("happy_meal_init: to happy_meal_init_rings\n"));
	happy_meal_init_rings(hp);

	/* Shut up the MIF. */
	HMD(("happy_meal_init: Disable all MIF irqs (old[%08x]), ",
	     hme_read32(hp, tregs + TCVR_IMASK)));
	hme_write32(hp, tregs + TCVR_IMASK, 0xffff);

	/* See if we can enable the MIF frame on this card to speak to the DP83840. */
	if (hp->happy_flags & HFLAG_FENABLE) {
		HMD(("use frame old[%08x], ",
		     hme_read32(hp, tregs + TCVR_CFG)));
		hme_write32(hp, tregs + TCVR_CFG,
			    hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
	} else {
		HMD(("use bitbang old[%08x], ",
		     hme_read32(hp, tregs + TCVR_CFG)));
		hme_write32(hp, tregs + TCVR_CFG,
			    hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
	}

	/* Check the state of the transceiver. */
	HMD(("to happy_meal_transceiver_check\n"));
	happy_meal_transceiver_check(hp, tregs);

	/* Put the Big Mac into a sane state. */
	HMD(("happy_meal_init: "));
	switch(hp->tcvr_type) {
	case none:
		/* Cannot operate if we don't know the transceiver type! */
		HMD(("AAIEEE no transceiver type, EAGAIN"));
		return -EAGAIN;

	case internal:
		/* Using the MII buffers. */
		HMD(("internal, using MII, "));
		hme_write32(hp, bregs + BMAC_XIFCFG, 0);
		break;

	case external:
		/* Not using the MII, disable it. */
		HMD(("external, disable MII, "));
		hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
		break;
	};

	if (happy_meal_tcvr_reset(hp, tregs))
		return -EAGAIN;

	/* Reset the Happy Meal Big Mac transceiver and the receiver. */
	HMD(("tx/rx reset, "));
	happy_meal_tx_reset(hp, bregs);
	happy_meal_rx_reset(hp, bregs);

	/* Set jam size and inter-packet gaps to reasonable defaults. */
	HMD(("jsize/ipg1/ipg2, "));
	hme_write32(hp, bregs + BMAC_JSIZE, DEFAULT_JAMSIZE);
	hme_write32(hp, bregs + BMAC_IGAP1, DEFAULT_IPG1);
	hme_write32(hp, bregs + BMAC_IGAP2, DEFAULT_IPG2);

	/* Load up the MAC address and random seed. */
	HMD(("rseed/macaddr, "));

	/* The docs recommend to use the 10LSB of our MAC here. */
	hme_write32(hp, bregs + BMAC_RSEED, ((e[5] | e[4]<<8)&0x3ff));

	hme_write32(hp, bregs + BMAC_MACADDR2, ((e[4] << 8) | e[5]));
	hme_write32(hp, bregs + BMAC_MACADDR1, ((e[2] << 8) | e[3]));
	hme_write32(hp, bregs + BMAC_MACADDR0, ((e[0] << 8) | e[1]));

	HMD(("htable, "));
	if ((hp->dev->flags & IFF_ALLMULTI) ||
	    (hp->dev->mc_count > 64)) {
		hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
		hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
		hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
		hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
	} else if ((hp->dev->flags & IFF_PROMISC) == 0) {
		u16 hash_table[4];
		struct dev_mc_list *dmi = hp->dev->mc_list;
		char *addrs;
		int i;
		u32 crc;

		for (i = 0; i < 4; i++)
			hash_table[i] = 0;

		for (i = 0; i < hp->dev->mc_count; i++) {
			addrs = dmi->dmi_addr;
			dmi = dmi->next;

			if (!(*addrs & 1))
				continue;

			crc = ether_crc_le(6, addrs);
			crc >>= 26;
			hash_table[crc >> 4] |= 1 << (crc & 0xf);
		}
		hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
		hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
		hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
		hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
	} else {
		hme_write32(hp, bregs + BMAC_HTABLE3, 0);
		hme_write32(hp, bregs + BMAC_HTABLE2, 0);
		hme_write32(hp, bregs + BMAC_HTABLE1, 0);
		hme_write32(hp, bregs + BMAC_HTABLE0, 0);
	}

	/* Set the RX and TX ring ptrs. */
	HMD(("ring ptrs rxr[%08x] txr[%08x]\n",
	     ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)),
	     ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0))));
	hme_write32(hp, erxregs + ERX_RING,
		    ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)));
	hme_write32(hp, etxregs + ETX_RING,
		    ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0)));

	/* Parity issues in the ERX unit of some HME revisions can cause some
	 * registers to not be written unless their parity is even.  Detect such
	 * lost writes and simply rewrite with a low bit set (which will be ignored
	 * since the rxring needs to be 2K aligned).
	 */
	if (hme_read32(hp, erxregs + ERX_RING) !=
	    ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)))
		hme_write32(hp, erxregs + ERX_RING,
			    ((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0))
			    | 0x4);

	/* Set the supported burst sizes. */
	HMD(("happy_meal_init: old[%08x] bursts<",
	     hme_read32(hp, gregs + GREG_CFG)));

#ifndef CONFIG_SPARC
	/* It is always PCI and can handle 64byte bursts. */
	hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST64);
#else
	if ((hp->happy_bursts & DMA_BURST64) &&
	    ((hp->happy_flags & HFLAG_PCI) != 0
#ifdef CONFIG_SBUS
	     || sbus_can_burst64()
#endif
	     || 0)) {
		u32 gcfg = GREG_CFG_BURST64;

		/* I have no idea if I should set the extended
		 * transfer mode bit for Cheerio, so for now I
		 * do not.  -DaveM
		 */
#ifdef CONFIG_SBUS
		if ((hp->happy_flags & HFLAG_PCI) == 0) {
			struct of_device *op = hp->happy_dev;
			if (sbus_can_dma_64bit()) {
				sbus_set_sbus64(&op->dev,
						hp->happy_bursts);
				gcfg |= GREG_CFG_64BIT;
			}
		}
#endif

		HMD(("64>"));
		hme_write32(hp, gregs + GREG_CFG, gcfg);
	} else if (hp->happy_bursts & DMA_BURST32) {
		HMD(("32>"));
		hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST32);
	} else if (hp->happy_bursts & DMA_BURST16) {
		HMD(("16>"));
		hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST16);
	} else {
		HMD(("XXX>"));
		hme_write32(hp, gregs + GREG_CFG, 0);
	}
#endif /* CONFIG_SPARC */

	/* Turn off interrupts we do not want to hear. */
	HMD((", enable global interrupts, "));
	hme_write32(hp, gregs + GREG_IMASK,
		    (GREG_IMASK_GOTFRAME | GREG_IMASK_RCNTEXP |
		     GREG_IMASK_SENTFRAME | GREG_IMASK_TXPERR));

	/* Set the transmit ring buffer size. */
	HMD(("tx rsize=%d oreg[%08x], ", (int)TX_RING_SIZE,
	     hme_read32(hp, etxregs + ETX_RSIZE)));
	hme_write32(hp, etxregs + ETX_RSIZE, (TX_RING_SIZE >> ETX_RSIZE_SHIFT) - 1);

	/* Enable transmitter DVMA. */
	HMD(("tx dma enable old[%08x], ",
	     hme_read32(hp, etxregs + ETX_CFG)));
	hme_write32(hp, etxregs + ETX_CFG,
		    hme_read32(hp, etxregs + ETX_CFG) | ETX_CFG_DMAENABLE);

	/* This chip really rots, for the receiver sometimes when you
	 * write to its control registers not all the bits get there
	 * properly.  I cannot think of a sane way to provide complete
	 * coverage for this hardware bug yet.
	 */
	HMD(("erx regs bug old[%08x]\n",
	     hme_read32(hp, erxregs + ERX_CFG)));
	hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
	regtmp = hme_read32(hp, erxregs + ERX_CFG);
	hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
	if (hme_read32(hp, erxregs + ERX_CFG) != ERX_CFG_DEFAULT(RX_OFFSET)) {
		printk(KERN_ERR "happy meal: Eieee, rx config register gets greasy fries.\n");
		printk(KERN_ERR "happy meal: Trying to set %08x, reread gives %08x\n",
		       ERX_CFG_DEFAULT(RX_OFFSET), regtmp);
		/* XXX Should return failure here... */
	}

	/* Enable Big Mac hash table filter. */
	HMD(("happy_meal_init: enable hash rx_cfg_old[%08x], ",
	     hme_read32(hp, bregs + BMAC_RXCFG)));
	rxcfg = BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_REJME;
	if (hp->dev->flags & IFF_PROMISC)
		rxcfg |= BIGMAC_RXCFG_PMISC;
	hme_write32(hp, bregs + BMAC_RXCFG, rxcfg);

	/* Let the bits settle in the chip. */
	udelay(10);

	/* Ok, configure the Big Mac transmitter. */
	HMD(("BIGMAC init, "));
	regtmp = 0;
	if (hp->happy_flags & HFLAG_FULL)
		regtmp |= BIGMAC_TXCFG_FULLDPLX;

	/* Don't turn on the "don't give up" bit for now.  It could cause hme
	 * to deadlock with the PHY if a Jabber occurs.
	 */
	hme_write32(hp, bregs + BMAC_TXCFG, regtmp /*| BIGMAC_TXCFG_DGIVEUP*/);

	/* Give up after 16 TX attempts. */
	hme_write32(hp, bregs + BMAC_ALIMIT, 16);

	/* Enable the output drivers no matter what. */
	regtmp = BIGMAC_XCFG_ODENABLE;

	/* If card can do lance mode, enable it. */
	if (hp->happy_flags & HFLAG_LANCE)
		regtmp |= (DEFAULT_IPG0 << 5) | BIGMAC_XCFG_LANCE;

	/* Disable the MII buffers if using external transceiver. */
	if (hp->tcvr_type == external)
		regtmp |= BIGMAC_XCFG_MIIDISAB;

	HMD(("XIF config old[%08x], ",
	     hme_read32(hp, bregs + BMAC_XIFCFG)));
	hme_write32(hp, bregs + BMAC_XIFCFG, regtmp);

	/* Start things up. */
	HMD(("tx old[%08x] and rx [%08x] ON!\n",
	     hme_read32(hp, bregs + BMAC_TXCFG),
	     hme_read32(hp, bregs + BMAC_RXCFG)));

	/* Set larger TX/RX size to allow for 802.1q */
	hme_write32(hp, bregs + BMAC_TXMAX, ETH_FRAME_LEN + 8);
	hme_write32(hp, bregs + BMAC_RXMAX, ETH_FRAME_LEN + 8);

	hme_write32(hp, bregs + BMAC_TXCFG,
		    hme_read32(hp, bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE);
	hme_write32(hp, bregs + BMAC_RXCFG,
		    hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE);

	/* Get the autonegotiation started, and the watch timer ticking. */
	happy_meal_begin_auto_negotiation(hp, tregs, NULL);

	/* Success. */
	return 0;
}

/* hp->happy_lock must be held */
static void happy_meal_set_initial_advertisement(struct happy_meal *hp)
{
	void __iomem *tregs	= hp->tcvregs;
	void __iomem *bregs	= hp->bigmacregs;
	void __iomem *gregs	= hp->gregs;

	happy_meal_stop(hp, gregs);
	hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
	if (hp->happy_flags & HFLAG_FENABLE)
		hme_write32(hp, tregs + TCVR_CFG,
			    hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
	else
		hme_write32(hp, tregs + TCVR_CFG,
			    hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
	happy_meal_transceiver_check(hp, tregs);
	switch(hp->tcvr_type) {
	case none:
		return;
	case internal:
		hme_write32(hp, bregs + BMAC_XIFCFG, 0);
		break;
	case external:
		hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
		break;
	};
	if (happy_meal_tcvr_reset(hp, tregs))
		return;

	/* Latch PHY registers as of now. */
	hp->sw_bmsr      = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
	hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);

	/* Advertise everything we can support. */
	if (hp->sw_bmsr & BMSR_10HALF)
		hp->sw_advertise |= (ADVERTISE_10HALF);
	else
		hp->sw_advertise &= ~(ADVERTISE_10HALF);

	if (hp->sw_bmsr & BMSR_10FULL)
		hp->sw_advertise |= (ADVERTISE_10FULL);
	else
		hp->sw_advertise &= ~(ADVERTISE_10FULL);
	if (hp->sw_bmsr & BMSR_100HALF)
		hp->sw_advertise |= (ADVERTISE_100HALF);
	else
		hp->sw_advertise &= ~(ADVERTISE_100HALF);
	if (hp->sw_bmsr & BMSR_100FULL)
		hp->sw_advertise |= (ADVERTISE_100FULL);
	else
		hp->sw_advertise &= ~(ADVERTISE_100FULL);

	/* Update the PHY advertisement register. */
	happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
}

/* Once status is latched (by happy_meal_interrupt) it is cleared by
 * the hardware, so we cannot re-read it and get a correct value.
 *
 * hp->happy_lock must be held
 */
static int happy_meal_is_not_so_happy(struct happy_meal *hp, u32 status)
{
	int reset = 0;

	/* Only print messages for non-counter related interrupts. */
	if (status & (GREG_STAT_STSTERR | GREG_STAT_TFIFO_UND |
		      GREG_STAT_MAXPKTERR | GREG_STAT_RXERR |
		      GREG_STAT_RXPERR | GREG_STAT_RXTERR | GREG_STAT_EOPERR |
		      GREG_STAT_MIFIRQ | GREG_STAT_TXEACK | GREG_STAT_TXLERR |
		      GREG_STAT_TXPERR | GREG_STAT_TXTERR | GREG_STAT_SLVERR |
		      GREG_STAT_SLVPERR))
		printk(KERN_ERR "%s: Error interrupt for happy meal, status = %08x\n",
		       hp->dev->name, status);

	if (status & GREG_STAT_RFIFOVF) {
		/* Receive FIFO overflow is harmless and the hardware will take
		   care of it, just some packets are lost. Who cares. */
		printk(KERN_DEBUG "%s: Happy Meal receive FIFO overflow.\n", hp->dev->name);
	}

	if (status & GREG_STAT_STSTERR) {
		/* BigMAC SQE link test failed. */
		printk(KERN_ERR "%s: Happy Meal BigMAC SQE test failed.\n", hp->dev->name);
		reset = 1;
	}

	if (status & GREG_STAT_TFIFO_UND) {
		/* Transmit FIFO underrun, again DMA error likely. */
		printk(KERN_ERR "%s: Happy Meal transmitter FIFO underrun, DMA error.\n",
		       hp->dev->name);
		reset = 1;
	}

	if (status & GREG_STAT_MAXPKTERR) {
		/* Driver error, tried to transmit something larger
		 * than ethernet max mtu.
		 */
		printk(KERN_ERR "%s: Happy Meal MAX Packet size error.\n", hp->dev->name);
		reset = 1;
	}

	if (status & GREG_STAT_NORXD) {
		/* This is harmless, it just means the system is
		 * quite loaded and the incoming packet rate was
		 * faster than the interrupt handler could keep up
		 * with.
		 */
		printk(KERN_INFO "%s: Happy Meal out of receive "
		       "descriptors, packet dropped.\n",
		       hp->dev->name);
	}

	if (status & (GREG_STAT_RXERR|GREG_STAT_RXPERR|GREG_STAT_RXTERR)) {
		/* All sorts of DMA receive errors. */
		printk(KERN_ERR "%s: Happy Meal rx DMA errors [ ", hp->dev->name);
		if (status & GREG_STAT_RXERR)
			printk("GenericError ");
		if (status & GREG_STAT_RXPERR)
			printk("ParityError ");
		if (status & GREG_STAT_RXTERR)
			printk("RxTagBotch ");
		printk("]\n");
		reset = 1;
	}

	if (status & GREG_STAT_EOPERR) {
		/* Driver bug, didn't set EOP bit in tx descriptor given
		 * to the happy meal.
		 */
		printk(KERN_ERR "%s: EOP not set in happy meal transmit descriptor!\n",
		       hp->dev->name);
		reset = 1;
	}

	if (status & GREG_STAT_MIFIRQ) {
		/* MIF signalled an interrupt, were we polling it? */
		printk(KERN_ERR "%s: Happy Meal MIF interrupt.\n", hp->dev->name);
	}

	if (status &
	    (GREG_STAT_TXEACK|GREG_STAT_TXLERR|GREG_STAT_TXPERR|GREG_STAT_TXTERR)) {
		/* All sorts of transmit DMA errors. */
		printk(KERN_ERR "%s: Happy Meal tx DMA errors [ ", hp->dev->name);
		if (status & GREG_STAT_TXEACK)
			printk("GenericError ");
		if (status & GREG_STAT_TXLERR)
			printk("LateError ");
		if (status & GREG_STAT_TXPERR)
			printk("ParityErro ");
		if (status & GREG_STAT_TXTERR)
			printk("TagBotch ");
		printk("]\n");
		reset = 1;
	}

	if (status & (GREG_STAT_SLVERR|GREG_STAT_SLVPERR)) {
		/* Bus or parity error when cpu accessed happy meal registers
		 * or it's internal FIFO's.  Should never see this.
		 */
		printk(KERN_ERR "%s: Happy Meal register access SBUS slave (%s) error.\n",
		       hp->dev->name,
		       (status & GREG_STAT_SLVPERR) ? "parity" : "generic");
		reset = 1;
	}

	if (reset) {
		printk(KERN_NOTICE "%s: Resetting...\n", hp->dev->name);
		happy_meal_init(hp);
		return 1;
	}
	return 0;
}

/* hp->happy_lock must be held */
static void happy_meal_mif_interrupt(struct happy_meal *hp)
{
	void __iomem *tregs = hp->tcvregs;

	printk(KERN_INFO "%s: Link status change.\n", hp->dev->name);
	hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
	hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);

	/* Use the fastest transmission protocol possible. */
	if (hp->sw_lpa & LPA_100FULL) {
		printk(KERN_INFO "%s: Switching to 100Mbps at full duplex.", hp->dev->name);
		hp->sw_bmcr |= (BMCR_FULLDPLX | BMCR_SPEED100);
	} else if (hp->sw_lpa & LPA_100HALF) {
		printk(KERN_INFO "%s: Switching to 100MBps at half duplex.", hp->dev->name);
		hp->sw_bmcr |= BMCR_SPEED100;
	} else if (hp->sw_lpa & LPA_10FULL) {
		printk(KERN_INFO "%s: Switching to 10MBps at full duplex.", hp->dev->name);
		hp->sw_bmcr |= BMCR_FULLDPLX;
	} else {
		printk(KERN_INFO "%s: Using 10Mbps at half duplex.", hp->dev->name);
	}
	happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);

	/* Finally stop polling and shut up the MIF. */
	happy_meal_poll_stop(hp, tregs);
}

#ifdef TXDEBUG
#define TXD(x) printk x
#else
#define TXD(x)
#endif

/* hp->happy_lock must be held */
static void happy_meal_tx(struct happy_meal *hp)
{
	struct happy_meal_txd *txbase = &hp->happy_block->happy_meal_txd[0];
	struct happy_meal_txd *this;
	struct net_device *dev = hp->dev;
	int elem;

	elem = hp->tx_old;
	TXD(("TX<"));
	while (elem != hp->tx_new) {
		struct sk_buff *skb;
		u32 flags, dma_addr, dma_len;
		int frag;

		TXD(("[%d]", elem));
		this = &txbase[elem];
		flags = hme_read_desc32(hp, &this->tx_flags);
		if (flags & TXFLAG_OWN)
			break;
		skb = hp->tx_skbs[elem];
		if (skb_shinfo(skb)->nr_frags) {
			int last;

			last = elem + skb_shinfo(skb)->nr_frags;
			last &= (TX_RING_SIZE - 1);
			flags = hme_read_desc32(hp, &txbase[last].tx_flags);
			if (flags & TXFLAG_OWN)
				break;
		}
		hp->tx_skbs[elem] = NULL;
		hp->net_stats.tx_bytes += skb->len;

		for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
			dma_addr = hme_read_desc32(hp, &this->tx_addr);
			dma_len = hme_read_desc32(hp, &this->tx_flags);

			dma_len &= TXFLAG_SIZE;
			dma_unmap_single(hp->dma_dev, dma_addr, dma_len, DMA_TO_DEVICE);

			elem = NEXT_TX(elem);
			this = &txbase[elem];
		}

		dev_kfree_skb_irq(skb);
		hp->net_stats.tx_packets++;
	}
	hp->tx_old = elem;
	TXD((">"));

	if (netif_queue_stopped(dev) &&
	    TX_BUFFS_AVAIL(hp) > (MAX_SKB_FRAGS + 1))
		netif_wake_queue(dev);
}

#ifdef RXDEBUG
#define RXD(x) printk x
#else
#define RXD(x)
#endif

/* Originally I used to handle the allocation failure by just giving back just
 * that one ring buffer to the happy meal.  Problem is that usually when that
 * condition is triggered, the happy meal expects you to do something reasonable
 * with all of the packets it has DMA'd in.  So now I just drop the entire
 * ring when we cannot get a new skb and give them all back to the happy meal,
 * maybe things will be "happier" now.
 *
 * hp->happy_lock must be held
 */
static void happy_meal_rx(struct happy_meal *hp, struct net_device *dev)
{
	struct happy_meal_rxd *rxbase = &hp->happy_block->happy_meal_rxd[0];
	struct happy_meal_rxd *this;
	int elem = hp->rx_new, drops = 0;
	u32 flags;

	RXD(("RX<"));
	this = &rxbase[elem];
	while (!((flags = hme_read_desc32(hp, &this->rx_flags)) & RXFLAG_OWN)) {
		struct sk_buff *skb;
		int len = flags >> 16;
		u16 csum = flags & RXFLAG_CSUM;
		u32 dma_addr = hme_read_desc32(hp, &this->rx_addr);

		RXD(("[%d ", elem));

		/* Check for errors. */
		if ((len < ETH_ZLEN) || (flags & RXFLAG_OVERFLOW)) {
			RXD(("ERR(%08x)]", flags));
			hp->net_stats.rx_errors++;
			if (len < ETH_ZLEN)
				hp->net_stats.rx_length_errors++;
			if (len & (RXFLAG_OVERFLOW >> 16)) {
				hp->net_stats.rx_over_errors++;
				hp->net_stats.rx_fifo_errors++;
			}

			/* Return it to the Happy meal. */
	drop_it:
			hp->net_stats.rx_dropped++;
			hme_write_rxd(hp, this,
				      (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
				      dma_addr);
			goto next;
		}
		skb = hp->rx_skbs[elem];
		if (len > RX_COPY_THRESHOLD) {
			struct sk_buff *new_skb;

			/* Now refill the entry, if we can. */
			new_skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
			if (new_skb == NULL) {
				drops++;
				goto drop_it;
			}
			dma_unmap_single(hp->dma_dev, dma_addr, RX_BUF_ALLOC_SIZE, DMA_FROM_DEVICE);
			hp->rx_skbs[elem] = new_skb;
			new_skb->dev = dev;
			skb_put(new_skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
			hme_write_rxd(hp, this,
				      (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
				      dma_map_single(hp->dma_dev, new_skb->data, RX_BUF_ALLOC_SIZE,
						     DMA_FROM_DEVICE));
			skb_reserve(new_skb, RX_OFFSET);

			/* Trim the original skb for the netif. */
			skb_trim(skb, len);
		} else {
			struct sk_buff *copy_skb = dev_alloc_skb(len + 2);

			if (copy_skb == NULL) {
				drops++;
				goto drop_it;
			}

			skb_reserve(copy_skb, 2);
			skb_put(copy_skb, len);
			dma_sync_single_for_cpu(hp->dma_dev, dma_addr, len, DMA_FROM_DEVICE);
			skb_copy_from_linear_data(skb, copy_skb->data, len);
			dma_sync_single_for_device(hp->dma_dev, dma_addr, len, DMA_FROM_DEVICE);
			/* Reuse original ring buffer. */
			hme_write_rxd(hp, this,
				      (RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
				      dma_addr);

			skb = copy_skb;
		}

		/* This card is _fucking_ hot... */
		skb->csum = csum_unfold(~(__force __sum16)htons(csum));
		skb->ip_summed = CHECKSUM_COMPLETE;

		RXD(("len=%d csum=%4x]", len, csum));
		skb->protocol = eth_type_trans(skb, dev);
		netif_rx(skb);

		hp->net_stats.rx_packets++;
		hp->net_stats.rx_bytes += len;
	next:
		elem = NEXT_RX(elem);
		this = &rxbase[elem];
	}
	hp->rx_new = elem;
	if (drops)
		printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n", hp->dev->name);
	RXD((">"));
}

static irqreturn_t happy_meal_interrupt(int irq, void *dev_id)
{
	struct net_device *dev = dev_id;
	struct happy_meal *hp  = netdev_priv(dev);
	u32 happy_status       = hme_read32(hp, hp->gregs + GREG_STAT);

	HMD(("happy_meal_interrupt: status=%08x ", happy_status));

	spin_lock(&hp->happy_lock);

	if (happy_status & GREG_STAT_ERRORS) {
		HMD(("ERRORS "));
		if (happy_meal_is_not_so_happy(hp, /* un- */ happy_status))
			goto out;
	}

	if (happy_status & GREG_STAT_MIFIRQ) {
		HMD(("MIFIRQ "));
		happy_meal_mif_interrupt(hp);
	}

	if (happy_status & GREG_STAT_TXALL) {
		HMD(("TXALL "));
		happy_meal_tx(hp);
	}

	if (happy_status & GREG_STAT_RXTOHOST) {
		HMD(("RXTOHOST "));
		happy_meal_rx(hp, dev);
	}

	HMD(("done\n"));
out:
	spin_unlock(&hp->happy_lock);

	return IRQ_HANDLED;
}

#ifdef CONFIG_SBUS
static irqreturn_t quattro_sbus_interrupt(int irq, void *cookie)
{
	struct quattro *qp = (struct quattro *) cookie;
	int i;

	for (i = 0; i < 4; i++) {
		struct net_device *dev = qp->happy_meals[i];
		struct happy_meal *hp  = netdev_priv(dev);
		u32 happy_status       = hme_read32(hp, hp->gregs + GREG_STAT);

		HMD(("quattro_interrupt: status=%08x ", happy_status));

		if (!(happy_status & (GREG_STAT_ERRORS |
				      GREG_STAT_MIFIRQ |
				      GREG_STAT_TXALL |
				      GREG_STAT_RXTOHOST)))
			continue;

		spin_lock(&hp->happy_lock);

		if (happy_status & GREG_STAT_ERRORS) {
			HMD(("ERRORS "));
			if (happy_meal_is_not_so_happy(hp, happy_status))
				goto next;
		}

		if (happy_status & GREG_STAT_MIFIRQ) {
			HMD(("MIFIRQ "));
			happy_meal_mif_interrupt(hp);
		}

		if (happy_status & GREG_STAT_TXALL) {
			HMD(("TXALL "));
			happy_meal_tx(hp);
		}

		if (happy_status & GREG_STAT_RXTOHOST) {
			HMD(("RXTOHOST "));
			happy_meal_rx(hp, dev);
		}

	next:
		spin_unlock(&hp->happy_lock);
	}
	HMD(("done\n"));

	return IRQ_HANDLED;
}
#endif

static int happy_meal_open(struct net_device *dev)
{
	struct happy_meal *hp = netdev_priv(dev);
	int res;

	HMD(("happy_meal_open: "));

	/* On SBUS Quattro QFE cards, all hme interrupts are concentrated
	 * into a single source which we register handling at probe time.
	 */
	if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO) {
		if (request_irq(dev->irq, &happy_meal_interrupt,
				IRQF_SHARED, dev->name, (void *)dev)) {
			HMD(("EAGAIN\n"));
			printk(KERN_ERR "happy_meal(SBUS): Can't order irq %d to go.\n",
			       dev->irq);

			return -EAGAIN;
		}
	}

	HMD(("to happy_meal_init\n"));

	spin_lock_irq(&hp->happy_lock);
	res = happy_meal_init(hp);
	spin_unlock_irq(&hp->happy_lock);

	if (res && ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO))
		free_irq(dev->irq, dev);
	return res;
}

static int happy_meal_close(struct net_device *dev)
{
	struct happy_meal *hp = netdev_priv(dev);

	spin_lock_irq(&hp->happy_lock);
	happy_meal_stop(hp, hp->gregs);
	happy_meal_clean_rings(hp);

	/* If auto-negotiation timer is running, kill it. */
	del_timer(&hp->happy_timer);

	spin_unlock_irq(&hp->happy_lock);

	/* On Quattro QFE cards, all hme interrupts are concentrated
	 * into a single source which we register handling at probe
	 * time and never unregister.
	 */
	if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO)
		free_irq(dev->irq, dev);

	return 0;
}

#ifdef SXDEBUG
#define SXD(x) printk x
#else
#define SXD(x)
#endif

static void happy_meal_tx_timeout(struct net_device *dev)
{
	struct happy_meal *hp = netdev_priv(dev);

	printk (KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
	tx_dump_log();
	printk (KERN_ERR "%s: Happy Status %08x TX[%08x:%08x]\n", dev->name,
		hme_read32(hp, hp->gregs + GREG_STAT),
		hme_read32(hp, hp->etxregs + ETX_CFG),
		hme_read32(hp, hp->bigmacregs + BMAC_TXCFG));

	spin_lock_irq(&hp->happy_lock);
	happy_meal_init(hp);
	spin_unlock_irq(&hp->happy_lock);

	netif_wake_queue(dev);
}

static int happy_meal_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct happy_meal *hp = netdev_priv(dev);
 	int entry;
 	u32 tx_flags;

	tx_flags = TXFLAG_OWN;
	if (skb->ip_summed == CHECKSUM_PARTIAL) {
		const u32 csum_start_off = skb_transport_offset(skb);
		const u32 csum_stuff_off = csum_start_off + skb->csum_offset;

		tx_flags = (TXFLAG_OWN | TXFLAG_CSENABLE |
			    ((csum_start_off << 14) & TXFLAG_CSBUFBEGIN) |
			    ((csum_stuff_off << 20) & TXFLAG_CSLOCATION));
	}

	spin_lock_irq(&hp->happy_lock);

 	if (TX_BUFFS_AVAIL(hp) <= (skb_shinfo(skb)->nr_frags + 1)) {
		netif_stop_queue(dev);
		spin_unlock_irq(&hp->happy_lock);
		printk(KERN_ERR "%s: BUG! Tx Ring full when queue awake!\n",
		       dev->name);
		return 1;
	}

	entry = hp->tx_new;
	SXD(("SX<l[%d]e[%d]>", len, entry));
	hp->tx_skbs[entry] = skb;

	if (skb_shinfo(skb)->nr_frags == 0) {
		u32 mapping, len;

		len = skb->len;
		mapping = dma_map_single(hp->dma_dev, skb->data, len, DMA_TO_DEVICE);
		tx_flags |= (TXFLAG_SOP | TXFLAG_EOP);
		hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
			      (tx_flags | (len & TXFLAG_SIZE)),
			      mapping);
		entry = NEXT_TX(entry);
	} else {
		u32 first_len, first_mapping;
		int frag, first_entry = entry;

		/* We must give this initial chunk to the device last.
		 * Otherwise we could race with the device.
		 */
		first_len = skb_headlen(skb);
		first_mapping = dma_map_single(hp->dma_dev, skb->data, first_len,
					       DMA_TO_DEVICE);
		entry = NEXT_TX(entry);

		for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
			skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
			u32 len, mapping, this_txflags;

			len = this_frag->size;
			mapping = dma_map_page(hp->dma_dev, this_frag->page,
					       this_frag->page_offset, len,
					       DMA_TO_DEVICE);
			this_txflags = tx_flags;
			if (frag == skb_shinfo(skb)->nr_frags - 1)
				this_txflags |= TXFLAG_EOP;
			hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
				      (this_txflags | (len & TXFLAG_SIZE)),
				      mapping);
			entry = NEXT_TX(entry);
		}
		hme_write_txd(hp, &hp->happy_block->happy_meal_txd[first_entry],
			      (tx_flags | TXFLAG_SOP | (first_len & TXFLAG_SIZE)),
			      first_mapping);
	}

	hp->tx_new = entry;

	if (TX_BUFFS_AVAIL(hp) <= (MAX_SKB_FRAGS + 1))
		netif_stop_queue(dev);

	/* Get it going. */
	hme_write32(hp, hp->etxregs + ETX_PENDING, ETX_TP_DMAWAKEUP);

	spin_unlock_irq(&hp->happy_lock);

	dev->trans_start = jiffies;

	tx_add_log(hp, TXLOG_ACTION_TXMIT, 0);
	return 0;
}

static struct net_device_stats *happy_meal_get_stats(struct net_device *dev)
{
	struct happy_meal *hp = netdev_priv(dev);

	spin_lock_irq(&hp->happy_lock);
	happy_meal_get_counters(hp, hp->bigmacregs);
	spin_unlock_irq(&hp->happy_lock);

	return &hp->net_stats;
}

static void happy_meal_set_multicast(struct net_device *dev)
{
	struct happy_meal *hp = netdev_priv(dev);
	void __iomem *bregs = hp->bigmacregs;
	struct dev_mc_list *dmi = dev->mc_list;
	char *addrs;
	int i;
	u32 crc;

	spin_lock_irq(&hp->happy_lock);

	if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
		hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
		hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
		hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
		hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
	} else if (dev->flags & IFF_PROMISC) {
		hme_write32(hp, bregs + BMAC_RXCFG,
			    hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_PMISC);
	} else {
		u16 hash_table[4];

		for (i = 0; i < 4; i++)
			hash_table[i] = 0;

		for (i = 0; i < dev->mc_count; i++) {
			addrs = dmi->dmi_addr;
			dmi = dmi->next;

			if (!(*addrs & 1))
				continue;

			crc = ether_crc_le(6, addrs);
			crc >>= 26;
			hash_table[crc >> 4] |= 1 << (crc & 0xf);
		}
		hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
		hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
		hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
		hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
	}

	spin_unlock_irq(&hp->happy_lock);
}

/* Ethtool support... */
static int hme_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct happy_meal *hp = netdev_priv(dev);

	cmd->supported =
		(SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
		 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
		 SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);

	/* XXX hardcoded stuff for now */
	cmd->port = PORT_TP; /* XXX no MII support */
	cmd->transceiver = XCVR_INTERNAL; /* XXX no external xcvr support */
	cmd->phy_address = 0; /* XXX fixed PHYAD */

	/* Record PHY settings. */
	spin_lock_irq(&hp->happy_lock);
	hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
	hp->sw_lpa = happy_meal_tcvr_read(hp, hp->tcvregs, MII_LPA);
	spin_unlock_irq(&hp->happy_lock);

	if (hp->sw_bmcr & BMCR_ANENABLE) {
		cmd->autoneg = AUTONEG_ENABLE;
		cmd->speed =
			(hp->sw_lpa & (LPA_100HALF | LPA_100FULL)) ?
			SPEED_100 : SPEED_10;
		if (cmd->speed == SPEED_100)
			cmd->duplex =
				(hp->sw_lpa & (LPA_100FULL)) ?
				DUPLEX_FULL : DUPLEX_HALF;
		else
			cmd->duplex =
				(hp->sw_lpa & (LPA_10FULL)) ?
				DUPLEX_FULL : DUPLEX_HALF;
	} else {
		cmd->autoneg = AUTONEG_DISABLE;
		cmd->speed =
			(hp->sw_bmcr & BMCR_SPEED100) ?
			SPEED_100 : SPEED_10;
		cmd->duplex =
			(hp->sw_bmcr & BMCR_FULLDPLX) ?
			DUPLEX_FULL : DUPLEX_HALF;
	}
	return 0;
}

static int hme_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct happy_meal *hp = netdev_priv(dev);

	/* Verify the settings we care about. */
	if (cmd->autoneg != AUTONEG_ENABLE &&
	    cmd->autoneg != AUTONEG_DISABLE)
		return -EINVAL;
	if (cmd->autoneg == AUTONEG_DISABLE &&
	    ((cmd->speed != SPEED_100 &&
	      cmd->speed != SPEED_10) ||
	     (cmd->duplex != DUPLEX_HALF &&
	      cmd->duplex != DUPLEX_FULL)))
		return -EINVAL;

	/* Ok, do it to it. */
	spin_lock_irq(&hp->happy_lock);
	del_timer(&hp->happy_timer);
	happy_meal_begin_auto_negotiation(hp, hp->tcvregs, cmd);
	spin_unlock_irq(&hp->happy_lock);

	return 0;
}

static void hme_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
	struct happy_meal *hp = netdev_priv(dev);

	strcpy(info->driver, "sunhme");
	strcpy(info->version, "2.02");
	if (hp->happy_flags & HFLAG_PCI) {
		struct pci_dev *pdev = hp->happy_dev;
		strcpy(info->bus_info, pci_name(pdev));
	}
#ifdef CONFIG_SBUS
	else {
		const struct linux_prom_registers *regs;
		struct of_device *op = hp->happy_dev;
		regs = of_get_property(op->node, "regs", NULL);
		if (regs)
			sprintf(info->bus_info, "SBUS:%d",
				regs->which_io);
	}
#endif
}

static u32 hme_get_link(struct net_device *dev)
{
	struct happy_meal *hp = netdev_priv(dev);

	spin_lock_irq(&hp->happy_lock);
	hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
	spin_unlock_irq(&hp->happy_lock);

	return (hp->sw_bmsr & BMSR_LSTATUS);
}

static const struct ethtool_ops hme_ethtool_ops = {
	.get_settings		= hme_get_settings,
	.set_settings		= hme_set_settings,
	.get_drvinfo		= hme_get_drvinfo,
	.get_link		= hme_get_link,
};

static int hme_version_printed;

#ifdef CONFIG_SBUS
/* Given a happy meal sbus device, find it's quattro parent.
 * If none exist, allocate and return a new one.
 *
 * Return NULL on failure.
 */
static struct quattro * __devinit quattro_sbus_find(struct of_device *child)
{
	struct device *parent = child->dev.parent;
	struct of_device *op;
	struct quattro *qp;

	op = to_of_device(parent);
	qp = dev_get_drvdata(&op->dev);
	if (qp)
		return qp;

	qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
	if (qp != NULL) {
		int i;

		for (i = 0; i < 4; i++)
			qp->happy_meals[i] = NULL;

		qp->quattro_dev = child;
		qp->next = qfe_sbus_list;
		qfe_sbus_list = qp;

		dev_set_drvdata(&op->dev, qp);
	}
	return qp;
}

/* After all quattro cards have been probed, we call these functions
 * to register the IRQ handlers.
 */
static void __init quattro_sbus_register_irqs(void)
{
	struct quattro *qp;

	for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
		struct of_device *op = qp->quattro_dev;
		int err;

		err = request_irq(op->irqs[0],
				  quattro_sbus_interrupt,
				  IRQF_SHARED, "Quattro",
				  qp);
		if (err != 0) {
			printk(KERN_ERR "Quattro: Fatal IRQ registery error %d.\n", err);
			panic("QFE request irq");
		}
	}
}

static void quattro_sbus_free_irqs(void)
{
	struct quattro *qp;

	for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
		struct of_device *op = qp->quattro_dev;

		free_irq(op->irqs[0], qp);
	}
}
#endif /* CONFIG_SBUS */

#ifdef CONFIG_PCI
static struct quattro * __devinit quattro_pci_find(struct pci_dev *pdev)
{
	struct pci_dev *bdev = pdev->bus->self;
	struct quattro *qp;

	if (!bdev) return NULL;
	for (qp = qfe_pci_list; qp != NULL; qp = qp->next) {
		struct pci_dev *qpdev = qp->quattro_dev;

		if (qpdev == bdev)
			return qp;
	}
	qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
	if (qp != NULL) {
		int i;

		for (i = 0; i < 4; i++)
			qp->happy_meals[i] = NULL;

		qp->quattro_dev = bdev;
		qp->next = qfe_pci_list;
		qfe_pci_list = qp;

		/* No range tricks necessary on PCI. */
		qp->nranges = 0;
	}
	return qp;
}
#endif /* CONFIG_PCI */

#ifdef CONFIG_SBUS
static int __devinit happy_meal_sbus_probe_one(struct of_device *op, int is_qfe)
{
	struct device_node *dp = op->node, *sbus_dp;
	struct quattro *qp = NULL;
	struct happy_meal *hp;
	struct net_device *dev;
	int i, qfe_slot = -1;
	int err = -ENODEV;

	if (is_qfe) {
		qp = quattro_sbus_find(op);
		if (qp == NULL)
			goto err_out;
		for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
			if (qp->happy_meals[qfe_slot] == NULL)
				break;
		if (qfe_slot == 4)
			goto err_out;
	}

	err = -ENOMEM;
	dev = alloc_etherdev(sizeof(struct happy_meal));
	if (!dev)
		goto err_out;
	SET_NETDEV_DEV(dev, &op->dev);

	if (hme_version_printed++ == 0)
		printk(KERN_INFO "%s", version);

	/* If user did not specify a MAC address specifically, use
	 * the Quattro local-mac-address property...
	 */
	for (i = 0; i < 6; i++) {
		if (macaddr[i] != 0)
			break;
	}
	if (i < 6) { /* a mac address was given */
		for (i = 0; i < 6; i++)
			dev->dev_addr[i] = macaddr[i];
		macaddr[5]++;
	} else {
		const unsigned char *addr;
		int len;

		addr = of_get_property(dp, "local-mac-address", &len);

		if (qfe_slot != -1 && addr && len == 6)
			memcpy(dev->dev_addr, addr, 6);
		else
			memcpy(dev->dev_addr, idprom->id_ethaddr, 6);
	}

	hp = netdev_priv(dev);

	hp->happy_dev = op;
	hp->dma_dev = &op->dev;

	spin_lock_init(&hp->happy_lock);

	err = -ENODEV;
	if (qp != NULL) {
		hp->qfe_parent = qp;
		hp->qfe_ent = qfe_slot;
		qp->happy_meals[qfe_slot] = dev;
	}

	hp->gregs = of_ioremap(&op->resource[0], 0,
			       GREG_REG_SIZE, "HME Global Regs");
	if (!hp->gregs) {
		printk(KERN_ERR "happymeal: Cannot map global registers.\n");
		goto err_out_free_netdev;
	}

	hp->etxregs = of_ioremap(&op->resource[1], 0,
				 ETX_REG_SIZE, "HME TX Regs");
	if (!hp->etxregs) {
		printk(KERN_ERR "happymeal: Cannot map MAC TX registers.\n");
		goto err_out_iounmap;
	}

	hp->erxregs = of_ioremap(&op->resource[2], 0,
				 ERX_REG_SIZE, "HME RX Regs");
	if (!hp->erxregs) {
		printk(KERN_ERR "happymeal: Cannot map MAC RX registers.\n");
		goto err_out_iounmap;
	}

	hp->bigmacregs = of_ioremap(&op->resource[3], 0,
				    BMAC_REG_SIZE, "HME BIGMAC Regs");
	if (!hp->bigmacregs) {
		printk(KERN_ERR "happymeal: Cannot map BIGMAC registers.\n");
		goto err_out_iounmap;
	}

	hp->tcvregs = of_ioremap(&op->resource[4], 0,
				 TCVR_REG_SIZE, "HME Tranceiver Regs");
	if (!hp->tcvregs) {
		printk(KERN_ERR "happymeal: Cannot map TCVR registers.\n");
		goto err_out_iounmap;
	}

	hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
	if (hp->hm_revision == 0xff)
		hp->hm_revision = 0xa0;

	/* Now enable the feature flags we can. */
	if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
		hp->happy_flags = HFLAG_20_21;
	else if (hp->hm_revision != 0xa0)
		hp->happy_flags = HFLAG_NOT_A0;

	if (qp != NULL)
		hp->happy_flags |= HFLAG_QUATTRO;

	sbus_dp = to_of_device(op->dev.parent)->node;
	if (is_qfe)
		sbus_dp = to_of_device(op->dev.parent->parent)->node;

	/* Get the supported DVMA burst sizes from our Happy SBUS. */
	hp->happy_bursts = of_getintprop_default(sbus_dp,
						 "burst-sizes", 0x00);

	hp->happy_block = dma_alloc_coherent(hp->dma_dev,
					     PAGE_SIZE,
					     &hp->hblock_dvma,
					     GFP_ATOMIC);
	err = -ENOMEM;
	if (!hp->happy_block) {
		printk(KERN_ERR "happymeal: Cannot allocate descriptors.\n");
		goto err_out_iounmap;
	}

	/* Force check of the link first time we are brought up. */
	hp->linkcheck = 0;

	/* Force timer state to 'asleep' with count of zero. */
	hp->timer_state = asleep;
	hp->timer_ticks = 0;

	init_timer(&hp->happy_timer);

	hp->dev = dev;
	dev->open = &happy_meal_open;
	dev->stop = &happy_meal_close;
	dev->hard_start_xmit = &happy_meal_start_xmit;
	dev->get_stats = &happy_meal_get_stats;
	dev->set_multicast_list = &happy_meal_set_multicast;
	dev->tx_timeout = &happy_meal_tx_timeout;
	dev->watchdog_timeo = 5*HZ;
	dev->ethtool_ops = &hme_ethtool_ops;

	/* Happy Meal can do it all... */
	dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;

	dev->irq = op->irqs[0];

#if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
	/* Hook up SBUS register/descriptor accessors. */
	hp->read_desc32 = sbus_hme_read_desc32;
	hp->write_txd = sbus_hme_write_txd;
	hp->write_rxd = sbus_hme_write_rxd;
	hp->read32 = sbus_hme_read32;
	hp->write32 = sbus_hme_write32;
#endif

	/* Grrr, Happy Meal comes up by default not advertising
	 * full duplex 100baseT capabilities, fix this.
	 */
	spin_lock_irq(&hp->happy_lock);
	happy_meal_set_initial_advertisement(hp);
	spin_unlock_irq(&hp->happy_lock);

	if (register_netdev(hp->dev)) {
		printk(KERN_ERR "happymeal: Cannot register net device, "
		       "aborting.\n");
		goto err_out_free_coherent;
	}

	dev_set_drvdata(&op->dev, hp);

	if (qfe_slot != -1)
		printk(KERN_INFO "%s: Quattro HME slot %d (SBUS) 10/100baseT Ethernet ",
		       dev->name, qfe_slot);
	else
		printk(KERN_INFO "%s: HAPPY MEAL (SBUS) 10/100baseT Ethernet ",
		       dev->name);

	printk("%pM\n", dev->dev_addr);

	return 0;

err_out_free_coherent:
	dma_free_coherent(hp->dma_dev,
			  PAGE_SIZE,
			  hp->happy_block,
			  hp->hblock_dvma);

err_out_iounmap:
	if (hp->gregs)
		of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
	if (hp->etxregs)
		of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
	if (hp->erxregs)
		of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
	if (hp->bigmacregs)
		of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
	if (hp->tcvregs)
		of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);

err_out_free_netdev:
	free_netdev(dev);

err_out:
	return err;
}
#endif

#ifdef CONFIG_PCI
#ifndef CONFIG_SPARC
static int is_quattro_p(struct pci_dev *pdev)
{
	struct pci_dev *busdev = pdev->bus->self;
	struct list_head *tmp;
	int n_hmes;

	if (busdev == NULL ||
	    busdev->vendor != PCI_VENDOR_ID_DEC ||
	    busdev->device != PCI_DEVICE_ID_DEC_21153)
		return 0;

	n_hmes = 0;
	tmp = pdev->bus->devices.next;
	while (tmp != &pdev->bus->devices) {
		struct pci_dev *this_pdev = pci_dev_b(tmp);

		if (this_pdev->vendor == PCI_VENDOR_ID_SUN &&
		    this_pdev->device == PCI_DEVICE_ID_SUN_HAPPYMEAL)
			n_hmes++;

		tmp = tmp->next;
	}

	if (n_hmes != 4)
		return 0;

	return 1;
}

/* Fetch MAC address from vital product data of PCI ROM. */
static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, int index, unsigned char *dev_addr)
{
	int this_offset;

	for (this_offset = 0x20; this_offset < len; this_offset++) {
		void __iomem *p = rom_base + this_offset;

		if (readb(p + 0) != 0x90 ||
		    readb(p + 1) != 0x00 ||
		    readb(p + 2) != 0x09 ||
		    readb(p + 3) != 0x4e ||
		    readb(p + 4) != 0x41 ||
		    readb(p + 5) != 0x06)
			continue;

		this_offset += 6;
		p += 6;

		if (index == 0) {
			int i;

			for (i = 0; i < 6; i++)
				dev_addr[i] = readb(p + i);
			return 1;
		}
		index--;
	}
	return 0;
}

static void get_hme_mac_nonsparc(struct pci_dev *pdev, unsigned char *dev_addr)
{
	size_t size;
	void __iomem *p = pci_map_rom(pdev, &size);

	if (p) {
		int index = 0;
		int found;

		if (is_quattro_p(pdev))
			index = PCI_SLOT(pdev->devfn);

		found = readb(p) == 0x55 &&
			readb(p + 1) == 0xaa &&
			find_eth_addr_in_vpd(p, (64 * 1024), index, dev_addr);
		pci_unmap_rom(pdev, p);
		if (found)
			return;
	}

	/* Sun MAC prefix then 3 random bytes. */
	dev_addr[0] = 0x08;
	dev_addr[1] = 0x00;
	dev_addr[2] = 0x20;
	get_random_bytes(&dev_addr[3], 3);
	return;
}
#endif /* !(CONFIG_SPARC) */

static int __devinit happy_meal_pci_probe(struct pci_dev *pdev,
					  const struct pci_device_id *ent)
{
	struct quattro *qp = NULL;
#ifdef CONFIG_SPARC
	struct device_node *dp;
#endif
	struct happy_meal *hp;
	struct net_device *dev;
	void __iomem *hpreg_base;
	unsigned long hpreg_res;
	int i, qfe_slot = -1;
	char prom_name[64];
	int err;

	/* Now make sure pci_dev cookie is there. */
#ifdef CONFIG_SPARC
	dp = pci_device_to_OF_node(pdev);
	strcpy(prom_name, dp->name);
#else
	if (is_quattro_p(pdev))
		strcpy(prom_name, "SUNW,qfe");
	else
		strcpy(prom_name, "SUNW,hme");
#endif

	err = -ENODEV;

	if (pci_enable_device(pdev))
		goto err_out;
	pci_set_master(pdev);

	if (!strcmp(prom_name, "SUNW,qfe") || !strcmp(prom_name, "qfe")) {
		qp = quattro_pci_find(pdev);
		if (qp == NULL)
			goto err_out;
		for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
			if (qp->happy_meals[qfe_slot] == NULL)
				break;
		if (qfe_slot == 4)
			goto err_out;
	}

	dev = alloc_etherdev(sizeof(struct happy_meal));
	err = -ENOMEM;
	if (!dev)
		goto err_out;
	SET_NETDEV_DEV(dev, &pdev->dev);

	if (hme_version_printed++ == 0)
		printk(KERN_INFO "%s", version);

	dev->base_addr = (long) pdev;

	hp = netdev_priv(dev);
	memset(hp, 0, sizeof(*hp));

	hp->happy_dev = pdev;
	hp->dma_dev = &pdev->dev;

	spin_lock_init(&hp->happy_lock);

	if (qp != NULL) {
		hp->qfe_parent = qp;
		hp->qfe_ent = qfe_slot;
		qp->happy_meals[qfe_slot] = dev;
	}

	hpreg_res = pci_resource_start(pdev, 0);
	err = -ENODEV;
	if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) {
		printk(KERN_ERR "happymeal(PCI): Cannot find proper PCI device base address.\n");
		goto err_out_clear_quattro;
	}
	if (pci_request_regions(pdev, DRV_NAME)) {
		printk(KERN_ERR "happymeal(PCI): Cannot obtain PCI resources, "
		       "aborting.\n");
		goto err_out_clear_quattro;
	}

	if ((hpreg_base = ioremap(hpreg_res, 0x8000)) == NULL) {
		printk(KERN_ERR "happymeal(PCI): Unable to remap card memory.\n");
		goto err_out_free_res;
	}

	for (i = 0; i < 6; i++) {
		if (macaddr[i] != 0)
			break;
	}
	if (i < 6) { /* a mac address was given */
		for (i = 0; i < 6; i++)
			dev->dev_addr[i] = macaddr[i];
		macaddr[5]++;
	} else {
#ifdef CONFIG_SPARC
		const unsigned char *addr;
		int len;

		if (qfe_slot != -1 &&
		    (addr = of_get_property(dp,
					    "local-mac-address", &len)) != NULL
		    && len == 6) {
			memcpy(dev->dev_addr, addr, 6);
		} else {
			memcpy(dev->dev_addr, idprom->id_ethaddr, 6);
		}
#else
		get_hme_mac_nonsparc(pdev, &dev->dev_addr[0]);
#endif
	}

	/* Layout registers. */
	hp->gregs      = (hpreg_base + 0x0000UL);
	hp->etxregs    = (hpreg_base + 0x2000UL);
	hp->erxregs    = (hpreg_base + 0x4000UL);
	hp->bigmacregs = (hpreg_base + 0x6000UL);
	hp->tcvregs    = (hpreg_base + 0x7000UL);

#ifdef CONFIG_SPARC
	hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
	if (hp->hm_revision == 0xff)
		hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
#else
	/* works with this on non-sparc hosts */
	hp->hm_revision = 0x20;
#endif

	/* Now enable the feature flags we can. */
	if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
		hp->happy_flags = HFLAG_20_21;
	else if (hp->hm_revision != 0xa0 && hp->hm_revision != 0xc0)
		hp->happy_flags = HFLAG_NOT_A0;

	if (qp != NULL)
		hp->happy_flags |= HFLAG_QUATTRO;

	/* And of course, indicate this is PCI. */
	hp->happy_flags |= HFLAG_PCI;

#ifdef CONFIG_SPARC
	/* Assume PCI happy meals can handle all burst sizes. */
	hp->happy_bursts = DMA_BURSTBITS;
#endif

	hp->happy_block = (struct hmeal_init_block *)
		dma_alloc_coherent(&pdev->dev, PAGE_SIZE, &hp->hblock_dvma, GFP_KERNEL);

	err = -ENODEV;
	if (!hp->happy_block) {
		printk(KERN_ERR "happymeal(PCI): Cannot get hme init block.\n");
		goto err_out_iounmap;
	}

	hp->linkcheck = 0;
	hp->timer_state = asleep;
	hp->timer_ticks = 0;

	init_timer(&hp->happy_timer);

	hp->dev = dev;
	dev->open = &happy_meal_open;
	dev->stop = &happy_meal_close;
	dev->hard_start_xmit = &happy_meal_start_xmit;
	dev->get_stats = &happy_meal_get_stats;
	dev->set_multicast_list = &happy_meal_set_multicast;
	dev->tx_timeout = &happy_meal_tx_timeout;
	dev->watchdog_timeo = 5*HZ;
	dev->ethtool_ops = &hme_ethtool_ops;
	dev->irq = pdev->irq;
	dev->dma = 0;

	/* Happy Meal can do it all... */
	dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;

#if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
	/* Hook up PCI register/descriptor accessors. */
	hp->read_desc32 = pci_hme_read_desc32;
	hp->write_txd = pci_hme_write_txd;
	hp->write_rxd = pci_hme_write_rxd;
	hp->read32 = pci_hme_read32;
	hp->write32 = pci_hme_write32;
#endif

	/* Grrr, Happy Meal comes up by default not advertising
	 * full duplex 100baseT capabilities, fix this.
	 */
	spin_lock_irq(&hp->happy_lock);
	happy_meal_set_initial_advertisement(hp);
	spin_unlock_irq(&hp->happy_lock);

	if (register_netdev(hp->dev)) {
		printk(KERN_ERR "happymeal(PCI): Cannot register net device, "
		       "aborting.\n");
		goto err_out_iounmap;
	}

	dev_set_drvdata(&pdev->dev, hp);

	if (!qfe_slot) {
		struct pci_dev *qpdev = qp->quattro_dev;

		prom_name[0] = 0;
		if (!strncmp(dev->name, "eth", 3)) {
			int i = simple_strtoul(dev->name + 3, NULL, 10);
			sprintf(prom_name, "-%d", i + 3);
		}
		printk(KERN_INFO "%s%s: Quattro HME (PCI/CheerIO) 10/100baseT Ethernet ", dev->name, prom_name);
		if (qpdev->vendor == PCI_VENDOR_ID_DEC &&
		    qpdev->device == PCI_DEVICE_ID_DEC_21153)
			printk("DEC 21153 PCI Bridge\n");
		else
			printk("unknown bridge %04x.%04x\n",
				qpdev->vendor, qpdev->device);
	}

	if (qfe_slot != -1)
		printk(KERN_INFO "%s: Quattro HME slot %d (PCI/CheerIO) 10/100baseT Ethernet ",
		       dev->name, qfe_slot);
	else
		printk(KERN_INFO "%s: HAPPY MEAL (PCI/CheerIO) 10/100BaseT Ethernet ",
		       dev->name);

	printk("%pM\n", dev->dev_addr);

	return 0;

err_out_iounmap:
	iounmap(hp->gregs);

err_out_free_res:
	pci_release_regions(pdev);

err_out_clear_quattro:
	if (qp != NULL)
		qp->happy_meals[qfe_slot] = NULL;

	free_netdev(dev);

err_out:
	return err;
}

static void __devexit happy_meal_pci_remove(struct pci_dev *pdev)
{
	struct happy_meal *hp = dev_get_drvdata(&pdev->dev);
	struct net_device *net_dev = hp->dev;

	unregister_netdev(net_dev);

	dma_free_coherent(hp->dma_dev, PAGE_SIZE,
			  hp->happy_block, hp->hblock_dvma);
	iounmap(hp->gregs);
	pci_release_regions(hp->happy_dev);

	free_netdev(net_dev);

	dev_set_drvdata(&pdev->dev, NULL);
}

static struct pci_device_id happymeal_pci_ids[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_HAPPYMEAL) },
	{ }			/* Terminating entry */
};

MODULE_DEVICE_TABLE(pci, happymeal_pci_ids);

static struct pci_driver hme_pci_driver = {
	.name		= "hme",
	.id_table	= happymeal_pci_ids,
	.probe		= happy_meal_pci_probe,
	.remove		= __devexit_p(happy_meal_pci_remove),
};

static int __init happy_meal_pci_init(void)
{
	return pci_register_driver(&hme_pci_driver);
}

static void happy_meal_pci_exit(void)
{
	pci_unregister_driver(&hme_pci_driver);

	while (qfe_pci_list) {
		struct quattro *qfe = qfe_pci_list;
		struct quattro *next = qfe->next;

		kfree(qfe);

		qfe_pci_list = next;
	}
}

#endif

#ifdef CONFIG_SBUS
static int __devinit hme_sbus_probe(struct of_device *op, const struct of_device_id *match)
{
	struct device_node *dp = op->node;
	const char *model = of_get_property(dp, "model", NULL);
	int is_qfe = (match->data != NULL);

	if (!is_qfe && model && !strcmp(model, "SUNW,sbus-qfe"))
		is_qfe = 1;

	return happy_meal_sbus_probe_one(op, is_qfe);
}

static int __devexit hme_sbus_remove(struct of_device *op)
{
	struct happy_meal *hp = dev_get_drvdata(&op->dev);
	struct net_device *net_dev = hp->dev;

	unregister_netdev(net_dev);

	/* XXX qfe parent interrupt... */

	of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
	of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
	of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
	of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
	of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);
	dma_free_coherent(hp->dma_dev,
			  PAGE_SIZE,
			  hp->happy_block,
			  hp->hblock_dvma);

	free_netdev(net_dev);

	dev_set_drvdata(&op->dev, NULL);

	return 0;
}

static const struct of_device_id hme_sbus_match[] = {
	{
		.name = "SUNW,hme",
	},
	{
		.name = "SUNW,qfe",
		.data = (void *) 1,
	},
	{
		.name = "qfe",
		.data = (void *) 1,
	},
	{},
};

MODULE_DEVICE_TABLE(of, hme_sbus_match);

static struct of_platform_driver hme_sbus_driver = {
	.name		= "hme",
	.match_table	= hme_sbus_match,
	.probe		= hme_sbus_probe,
	.remove		= __devexit_p(hme_sbus_remove),
};

static int __init happy_meal_sbus_init(void)
{
	int err;

	err = of_register_driver(&hme_sbus_driver, &of_bus_type);
	if (!err)
		quattro_sbus_register_irqs();

	return err;
}

static void happy_meal_sbus_exit(void)
{
	of_unregister_driver(&hme_sbus_driver);
	quattro_sbus_free_irqs();

	while (qfe_sbus_list) {
		struct quattro *qfe = qfe_sbus_list;
		struct quattro *next = qfe->next;

		kfree(qfe);

		qfe_sbus_list = next;
	}
}
#endif

static int __init happy_meal_probe(void)
{
	int err = 0;

#ifdef CONFIG_SBUS
	err = happy_meal_sbus_init();
#endif
#ifdef CONFIG_PCI
	if (!err) {
		err = happy_meal_pci_init();
#ifdef CONFIG_SBUS
		if (err)
			happy_meal_sbus_exit();
#endif
	}
#endif

	return err;
}


static void __exit happy_meal_exit(void)
{
#ifdef CONFIG_SBUS
	happy_meal_sbus_exit();
#endif
#ifdef CONFIG_PCI
	happy_meal_pci_exit();
#endif
}

module_init(happy_meal_probe);
module_exit(happy_meal_exit);