1 /*
2 * Ctlr for the boards using the National Semiconductor DP8390
3 * and SMC 83C90 Network Interface Controller.
4 * Common code is in ether8390.c.
5 */
6 typedef struct {
7 Lock;
8
9 ulong port; /* I/O address of 8390 */
10 ulong data; /* I/O data port if no shared memory */
11
12 uchar width; /* data transfer width in bytes */
13 uchar ram; /* true if card has shared memory */
14 uchar dummyrr; /* do dummy remote read */
15
16 uchar nxtpkt; /* receive: software bndry */
17 uchar pstart;
18 uchar pstop;
19
20 int txbusy; /* transmit */
21 uchar tstart; /* 8390 ring addresses */
22
23 uchar mar[8]; /* shadow multicast address registers */
24 int mref[64]; /* reference counts for multicast groups */
25 } Dp8390;
26
27 #define Dp8390BufSz 256
28
29 extern int dp8390reset(Ether*);
30 extern void *dp8390read(Dp8390*, void*, ulong, ulong);
31 extern void dp8390getea(Ether*, uchar*);
32 extern void dp8390setea(Ether*);
33
34 /*
35 * x86-specific code.
36 */
37 #define regr(c, r) inb((c)->port+(r))
38 #define regw(c, r, v) outb((c)->port+(r), (v))
39
40 static void
rdread(Dp8390 * ctlr,void * to,int len)41 rdread(Dp8390* ctlr, void* to, int len)
42 {
43 switch(ctlr->width){
44 default:
45 panic("dp8390 rdread: width %d\n", ctlr->width);
46 break;
47
48 case 2:
49 inss(ctlr->data, to, len/2);
50 break;
51
52 case 1:
53 insb(ctlr->data, to, len);
54 break;
55 }
56 }
57
58 static void
rdwrite(Dp8390 * ctlr,void * from,int len)59 rdwrite(Dp8390* ctlr, void* from, int len)
60 {
61 switch(ctlr->width){
62 default:
63 panic("dp8390 rdwrite: width %d\n", ctlr->width);
64 break;
65
66 case 2:
67 outss(ctlr->data, from, len/2);
68 break;
69
70 case 1:
71 outsb(ctlr->data, from, len);
72 break;
73 }
74 }
75