blob: 813f020ee9a90d124fa973a0a939e8da7c916073 [file] [log] [blame]
wdenkaffae2b2002-08-17 09:36:01 +00001#include <common.h>
2#include <mii_phy.h>
3#include "ep8260.h"
4
5#define MII_MDIO 0x01
6#define MII_MDCK 0x02
7#define MII_MDIR 0x04
8
9void
10mii_discover_phy(void)
11{
12 int known;
13 unsigned short phy_reg;
14 unsigned long phy_id;
15
16 known = 0;
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) {
21 printf("Level One ");
22 if ((phy_id & 0x000003F0) == 0xE0) {
23 printf("LXT971A Revision %d\n", (int)(phy_id & 0xF));
24 known = 1;
25 }
26 else printf("unknown type\n");
27 }
28 else printf("unknown OUI = 0x%08lX\n", phy_id);
29
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");
35
36 if (known) {
37 phy_reg = mii_phy_read(17);
38 if (phy_reg & 0x0400)
39 printf("Phy operating at %d MBit/s in %s-duplex mode\n",
40 phy_reg & 0x4000 ? 100 : 10,
wdenk8bde7f72003-06-27 21:31:46 +000041 phy_reg & 0x0200 ? "full" : "half");
wdenkaffae2b2002-08-17 09:36:01 +000042 else
43 printf("bad link!!\n");
44/*
45left off: no link, green 100MBit, yellow 10MBit
46right off: no activity, green full-duplex, yellow half-duplex
47*/
48 mii_phy_write(20, 0x0452);
49 }
50}
51
52unsigned short
53mii_phy_read(unsigned short reg)
54{
55 int i;
56 unsigned short tmp, val = 0, adr = 0;
57 t_ep_regs *regs = (t_ep_regs*)CFG_REGS_BASE;
58
59 tmp = 0x6002 | (adr << 7) | (reg << 2);
60 regs->bcsr4 = 0xC3;
61 for (i = 0; i < 64; i++) {
wdenk8bde7f72003-06-27 21:31:46 +000062 regs->bcsr4 ^= MII_MDCK;
wdenkaffae2b2002-08-17 09:36:01 +000063 }
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;
69 tmp <<= 1;
70 }
71 regs->bcsr4 |= MII_MDIR;
72 for (i = 0; i < 16; i++) {
73 val <<= 1;
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);
77 }
78 return val;
79}
80
81void
82mii_phy_write(unsigned short reg, unsigned short val)
83{
84 int i;
85 unsigned short tmp, adr = 0;
86 t_ep_regs *regs = (t_ep_regs*)CFG_REGS_BASE;
87
88 tmp = 0x5002 | (adr << 7) | (reg << 2);
89 regs->bcsr4 = 0xC3;
90 for (i = 0; i < 64; i++) {
91 regs->bcsr4 ^= MII_MDCK;
92 }
93 for (i = 0; i < 16; i++) {
94 regs->bcsr4 &= ~MII_MDCK;
wdenk8bde7f72003-06-27 21:31:46 +000095 if (tmp & 0x8000) regs->bcsr4 |= MII_MDIO;
wdenkaffae2b2002-08-17 09:36:01 +000096 else regs->bcsr4 &= ~MII_MDIO;
97 regs->bcsr4 |= MII_MDCK;
98 tmp <<= 1;
99 }
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;
105 val <<= 1;
106 }
107}