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git.ipfire.org Git - u-boot.git/blob - board/ep8260/mii_phy.c
10 mii_discover_phy(void)
13 unsigned short phy_reg
;
17 printf("Discovering phy @ 0: ");
18 phy_id
= mii_phy_read(2) << 16;
19 phy_id
|= mii_phy_read(3);
20 if ((phy_id
& 0xFFFFFC00) == 0x00137800) {
22 if ((phy_id
& 0x000003F0) == 0xE0) {
23 printf("LXT971A Revision %d\n", (int)(phy_id
& 0xF));
26 else printf("unknown type\n");
28 else printf("unknown OUI = 0x%08lX\n", phy_id
);
30 phy_reg
= mii_phy_read(1);
31 if (!(phy_reg
& 0x0004)) printf("Link is down\n");
32 if (!(phy_reg
& 0x0020)) printf("Auto-negotiation not complete\n");
33 if (phy_reg
& 0x0002) printf("Jabber condition detected\n");
34 if (phy_reg
& 0x0010) printf("Remote fault condition detected \n");
37 phy_reg
= mii_phy_read(17);
39 printf("Phy operating at %d MBit/s in %s-duplex mode\n",
40 phy_reg
& 0x4000 ? 100 : 10,
41 phy_reg
& 0x0200 ? "full" : "half");
43 printf("bad link!!\n");
45 left off: no link, green 100MBit, yellow 10MBit
46 right off: no activity, green full-duplex, yellow half-duplex
48 mii_phy_write(20, 0x0452);
53 mii_phy_read(unsigned short reg
)
56 unsigned short tmp
, val
= 0, adr
= 0;
57 t_ep_regs
*regs
= (t_ep_regs
*)CFG_REGS_BASE
;
59 tmp
= 0x6002 | (adr
<< 7) | (reg
<< 2);
61 for (i
= 0; i
< 64; i
++) {
62 regs
->bcsr4
^= MII_MDCK
;
64 for (i
= 0; i
< 16; i
++) {
65 regs
->bcsr4
&= ~MII_MDCK
;
66 if (tmp
& 0x8000) regs
->bcsr4
|= MII_MDIO
;
67 else regs
->bcsr4
&= ~MII_MDIO
;
68 regs
->bcsr4
|= MII_MDCK
;
71 regs
->bcsr4
|= MII_MDIR
;
72 for (i
= 0; i
< 16; i
++) {
74 regs
->bcsr4
= MII_MDIO
| (regs
->bcsr4
| MII_MDCK
);
75 if (regs
->bcsr4
& MII_MDIO
) val
|= 1;
76 regs
->bcsr4
= MII_MDIO
| (regs
->bcsr4
&= ~MII_MDCK
);
82 mii_phy_write(unsigned short reg
, unsigned short val
)
85 unsigned short tmp
, adr
= 0;
86 t_ep_regs
*regs
= (t_ep_regs
*)CFG_REGS_BASE
;
88 tmp
= 0x5002 | (adr
<< 7) | (reg
<< 2);
90 for (i
= 0; i
< 64; i
++) {
91 regs
->bcsr4
^= MII_MDCK
;
93 for (i
= 0; i
< 16; i
++) {
94 regs
->bcsr4
&= ~MII_MDCK
;
95 if (tmp
& 0x8000) regs
->bcsr4
|= MII_MDIO
;
96 else regs
->bcsr4
&= ~MII_MDIO
;
97 regs
->bcsr4
|= MII_MDCK
;
100 for (i
= 0; i
< 16; i
++) {
101 regs
->bcsr4
&= ~MII_MDCK
;
102 if (val
& 0x8000) regs
->bcsr4
|= MII_MDIO
;
103 else regs
->bcsr4
&= ~MII_MDIO
;
104 regs
->bcsr4
|= MII_MDCK
;