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mii.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2001
* Gerald Van Baren, Custom IDEAS, [email protected]
*/
/*
* MII Utilities
*/
#include <common.h>
#include <command.h>
#include <dm.h>
#include <miiphy.h>
typedef struct _MII_field_desc_t {
ushort hi;
ushort lo;
ushort mask;
const char *name;
} MII_field_desc_t;
static const MII_field_desc_t reg_0_desc_tbl[] = {
{ 15, 15, 0x01, "reset" },
{ 14, 14, 0x01, "loopback" },
{ 13, 6, 0x81, "speed selection" }, /* special */
{ 12, 12, 0x01, "A/N enable" },
{ 11, 11, 0x01, "power-down" },
{ 10, 10, 0x01, "isolate" },
{ 9, 9, 0x01, "restart A/N" },
{ 8, 8, 0x01, "duplex" }, /* special */
{ 7, 7, 0x01, "collision test enable" },
{ 5, 0, 0x3f, "(reserved)" }
};
static const MII_field_desc_t reg_1_desc_tbl[] = {
{ 15, 15, 0x01, "100BASE-T4 able" },
{ 14, 14, 0x01, "100BASE-X full duplex able" },
{ 13, 13, 0x01, "100BASE-X half duplex able" },
{ 12, 12, 0x01, "10 Mbps full duplex able" },
{ 11, 11, 0x01, "10 Mbps half duplex able" },
{ 10, 10, 0x01, "100BASE-T2 full duplex able" },
{ 9, 9, 0x01, "100BASE-T2 half duplex able" },
{ 8, 8, 0x01, "extended status" },
{ 7, 7, 0x01, "(reserved)" },
{ 6, 6, 0x01, "MF preamble suppression" },
{ 5, 5, 0x01, "A/N complete" },
{ 4, 4, 0x01, "remote fault" },
{ 3, 3, 0x01, "A/N able" },
{ 2, 2, 0x01, "link status" },
{ 1, 1, 0x01, "jabber detect" },
{ 0, 0, 0x01, "extended capabilities" },
};
static const MII_field_desc_t reg_2_desc_tbl[] = {
{ 15, 0, 0xffff, "OUI portion" },
};
static const MII_field_desc_t reg_3_desc_tbl[] = {
{ 15, 10, 0x3f, "OUI portion" },
{ 9, 4, 0x3f, "manufacturer part number" },
{ 3, 0, 0x0f, "manufacturer rev. number" },
};
static const MII_field_desc_t reg_4_desc_tbl[] = {
{ 15, 15, 0x01, "next page able" },
{ 14, 14, 0x01, "(reserved)" },
{ 13, 13, 0x01, "remote fault" },
{ 12, 12, 0x01, "(reserved)" },
{ 11, 11, 0x01, "asymmetric pause" },
{ 10, 10, 0x01, "pause enable" },
{ 9, 9, 0x01, "100BASE-T4 able" },
{ 8, 8, 0x01, "100BASE-TX full duplex able" },
{ 7, 7, 0x01, "100BASE-TX able" },
{ 6, 6, 0x01, "10BASE-T full duplex able" },
{ 5, 5, 0x01, "10BASE-T able" },
{ 4, 0, 0x1f, "selector" },
};
static const MII_field_desc_t reg_5_desc_tbl[] = {
{ 15, 15, 0x01, "next page able" },
{ 14, 14, 0x01, "acknowledge" },
{ 13, 13, 0x01, "remote fault" },
{ 12, 12, 0x01, "(reserved)" },
{ 11, 11, 0x01, "asymmetric pause able" },
{ 10, 10, 0x01, "pause able" },
{ 9, 9, 0x01, "100BASE-T4 able" },
{ 8, 8, 0x01, "100BASE-X full duplex able" },
{ 7, 7, 0x01, "100BASE-TX able" },
{ 6, 6, 0x01, "10BASE-T full duplex able" },
{ 5, 5, 0x01, "10BASE-T able" },
{ 4, 0, 0x1f, "partner selector" },
};
static const MII_field_desc_t reg_9_desc_tbl[] = {
{ 15, 13, 0x07, "test mode" },
{ 12, 12, 0x01, "manual master/slave enable" },
{ 11, 11, 0x01, "manual master/slave value" },
{ 10, 10, 0x01, "multi/single port" },
{ 9, 9, 0x01, "1000BASE-T full duplex able" },
{ 8, 8, 0x01, "1000BASE-T half duplex able" },
{ 7, 7, 0x01, "automatic TDR on link down" },
{ 6, 6, 0x7f, "(reserved)" },
};
static const MII_field_desc_t reg_10_desc_tbl[] = {
{ 15, 15, 0x01, "master/slave config fault" },
{ 14, 14, 0x01, "master/slave config result" },
{ 13, 13, 0x01, "local receiver status OK" },
{ 12, 12, 0x01, "remote receiver status OK" },
{ 11, 11, 0x01, "1000BASE-T full duplex able" },
{ 10, 10, 0x01, "1000BASE-T half duplex able" },
{ 9, 8, 0x03, "(reserved)" },
{ 7, 0, 0xff, "1000BASE-T idle error counter"},
};
typedef struct _MII_reg_desc_t {
ushort regno;
const MII_field_desc_t *pdesc;
ushort len;
const char *name;
} MII_reg_desc_t;
static const MII_reg_desc_t mii_reg_desc_tbl[] = {
{ MII_BMCR, reg_0_desc_tbl, ARRAY_SIZE(reg_0_desc_tbl),
"PHY control register" },
{ MII_BMSR, reg_1_desc_tbl, ARRAY_SIZE(reg_1_desc_tbl),
"PHY status register" },
{ MII_PHYSID1, reg_2_desc_tbl, ARRAY_SIZE(reg_2_desc_tbl),
"PHY ID 1 register" },
{ MII_PHYSID2, reg_3_desc_tbl, ARRAY_SIZE(reg_3_desc_tbl),
"PHY ID 2 register" },
{ MII_ADVERTISE, reg_4_desc_tbl, ARRAY_SIZE(reg_4_desc_tbl),
"Autonegotiation advertisement register" },
{ MII_LPA, reg_5_desc_tbl, ARRAY_SIZE(reg_5_desc_tbl),
"Autonegotiation partner abilities register" },
{ MII_CTRL1000, reg_9_desc_tbl, ARRAY_SIZE(reg_9_desc_tbl),
"1000BASE-T control register" },
{ MII_STAT1000, reg_10_desc_tbl, ARRAY_SIZE(reg_10_desc_tbl),
"1000BASE-T status register" },
};
static void dump_reg(
ushort regval,
const MII_reg_desc_t *prd);
static bool special_field(ushort regno, const MII_field_desc_t *pdesc,
ushort regval);
static void MII_dump(const ushort *regvals, uchar reglo, uchar reghi)
{
ulong i;
for (i = 0; i < ARRAY_SIZE(mii_reg_desc_tbl); i++) {
const uchar reg = mii_reg_desc_tbl[i].regno;
if (reg >= reglo && reg <= reghi)
dump_reg(regvals[reg - reglo], &mii_reg_desc_tbl[i]);
}
}
/* Print out field position, value, name */
static void dump_field(const MII_field_desc_t *pdesc, ushort regval)
{
if (pdesc->hi == pdesc->lo)
printf("%2u ", pdesc->lo);
else
printf("%2u-%2u", pdesc->hi, pdesc->lo);
printf(" = %5u %s", (regval >> pdesc->lo) & pdesc->mask,
pdesc->name);
}
static void dump_reg(
ushort regval,
const MII_reg_desc_t *prd)
{
ulong i;
ushort mask_in_place;
const MII_field_desc_t *pdesc;
printf("%u. (%04hx) -- %s --\n",
prd->regno, regval, prd->name);
for (i = 0; i < prd->len; i++) {
pdesc = &prd->pdesc[i];
mask_in_place = pdesc->mask << pdesc->lo;
printf(" (%04hx:%04x) %u.",
mask_in_place,
regval & mask_in_place,
prd->regno);
if (!special_field(prd->regno, pdesc, regval))
dump_field(pdesc, regval);
printf("\n");
}
printf("\n");
}
/* Special fields:
** 0.6,13
** 0.8
** 2.15-0
** 3.15-0
** 4.4-0
** 5.4-0
*/
static bool special_field(ushort regno, const MII_field_desc_t *pdesc,
ushort regval)
{
const ushort sel_bits = (regval >> pdesc->lo) & pdesc->mask;
if ((regno == MII_BMCR) && (pdesc->lo == 6)) {
ushort speed_bits = regval & (BMCR_SPEED1000 | BMCR_SPEED100);
printf("%2u,%2u = b%u%u speed selection = %s Mbps",
6, 13,
(regval >> 6) & 1,
(regval >> 13) & 1,
speed_bits == BMCR_SPEED1000 ? "1000" :
speed_bits == BMCR_SPEED100 ? "100" :
"10");
return 1;
}
else if ((regno == MII_BMCR) && (pdesc->lo == 8)) {
dump_field(pdesc, regval);
printf(" = %s", ((regval >> pdesc->lo) & 1) ? "full" : "half");
return 1;
}
else if ((regno == MII_ADVERTISE) && (pdesc->lo == 0)) {
dump_field(pdesc, regval);
printf(" = %s",
sel_bits == PHY_ANLPAR_PSB_802_3 ? "IEEE 802.3 CSMA/CD" :
sel_bits == PHY_ANLPAR_PSB_802_9 ?
"IEEE 802.9 ISLAN-16T" : "???");
return 1;
}
else if ((regno == MII_LPA) && (pdesc->lo == 0)) {
dump_field(pdesc, regval);
printf(" = %s",
sel_bits == PHY_ANLPAR_PSB_802_3 ? "IEEE 802.3 CSMA/CD" :
sel_bits == PHY_ANLPAR_PSB_802_9 ?
"IEEE 802.9 ISLAN-16T" : "???");
return 1;
}
return 0;
}
static char last_op[2];
static uint last_data;
static uint last_addr_lo;
static uint last_addr_hi;
static uint last_reg_lo;
static uint last_reg_hi;
static uint last_mask;
static void extract_range(
char * input,
unsigned char * plo,
unsigned char * phi)
{
char * end;
*plo = hextoul(input, &end);
if (*end == '-') {
end++;
*phi = hextoul(end, NULL);
}
else {
*phi = *plo;
}
}
/* ---------------------------------------------------------------- */
static int do_mii(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
char op[2];
unsigned char addrlo, addrhi, reglo, reghi;
unsigned char addr, reg;
unsigned short data, mask;
int rcode = 0;
const char *devname;
if (argc < 2)
return CMD_RET_USAGE;
#if defined(CONFIG_MII_INIT)
mii_init ();
#endif
/*
* We use the last specified parameters, unless new ones are
* entered.
*/
op[0] = last_op[0];
op[1] = last_op[1];
addrlo = last_addr_lo;
addrhi = last_addr_hi;
reglo = last_reg_lo;
reghi = last_reg_hi;
data = last_data;
mask = last_mask;
if ((flag & CMD_FLAG_REPEAT) == 0) {
op[0] = argv[1][0];
if (strlen(argv[1]) > 1)
op[1] = argv[1][1];
else
op[1] = '\0';
if (argc >= 3)
extract_range(argv[2], &addrlo, &addrhi);
if (argc >= 4)
extract_range(argv[3], ®lo, ®hi);
if (argc >= 5)
data = hextoul(argv[4], NULL);
if (argc >= 6)
mask = hextoul(argv[5], NULL);
}
if (addrhi > 31 && strncmp(op, "de", 2)) {
printf("Incorrect PHY address. Range should be 0-31\n");
return CMD_RET_USAGE;
}
/* use current device */
devname = miiphy_get_current_dev();
/*
* check info/read/write.
*/
if (op[0] == 'i') {
unsigned char j, start, end;
unsigned int oui;
unsigned char model;
unsigned char rev;
/*
* Look for any and all PHYs. Valid addresses are 0..31.
*/
if (argc >= 3) {
start = addrlo; end = addrhi;
} else {
start = 0; end = 31;
}
for (j = start; j <= end; j++) {
if (miiphy_info (devname, j, &oui, &model, &rev) == 0) {
printf("PHY 0x%02X: "
"OUI = 0x%04X, "
"Model = 0x%02X, "
"Rev = 0x%02X, "
"%3dbase%s, %s\n",
j, oui, model, rev,
miiphy_speed (devname, j),
miiphy_is_1000base_x (devname, j)
? "X" : "T",
(miiphy_duplex (devname, j) == FULL)
? "FDX" : "HDX");
}
}
} else if (op[0] == 'r') {
for (addr = addrlo; addr <= addrhi; addr++) {
for (reg = reglo; reg <= reghi; reg++) {
data = 0xffff;
if (miiphy_read (devname, addr, reg, &data) != 0) {
printf(
"Error reading from the PHY addr=%02x reg=%02x\n",
addr, reg);
rcode = 1;
} else {
if ((addrlo != addrhi) || (reglo != reghi))
printf("addr=%02x reg=%02x data=",
(uint)addr, (uint)reg);
printf("%04X\n", data & 0x0000FFFF);
}
}
if ((addrlo != addrhi) && (reglo != reghi))
printf("\n");
}
} else if (op[0] == 'w') {
for (addr = addrlo; addr <= addrhi; addr++) {
for (reg = reglo; reg <= reghi; reg++) {
if (miiphy_write (devname, addr, reg, data) != 0) {
printf("Error writing to the PHY addr=%02x reg=%02x\n",
addr, reg);
rcode = 1;
}
}
}
} else if (op[0] == 'm') {
for (addr = addrlo; addr <= addrhi; addr++) {
for (reg = reglo; reg <= reghi; reg++) {
unsigned short val = 0;
if (miiphy_read(devname, addr,
reg, &val)) {
printf("Error reading from the PHY");
printf(" addr=%02x", addr);
printf(" reg=%02x\n", reg);
rcode = 1;
} else {
val = (val & ~mask) | (data & mask);
if (miiphy_write(devname, addr,
reg, val)) {
printf("Error writing to the PHY");
printf(" addr=%02x", addr);
printf(" reg=%02x\n", reg);
rcode = 1;
}
}
}
}
} else if (strncmp(op, "du", 2) == 0) {
ushort regs[MII_STAT1000 + 1]; /* Last reg is 0x0a */
int ok = 1;
if (reglo > MII_STAT1000 || reghi > MII_STAT1000) {
printf("The MII dump command only formats the standard MII registers, 0-5, 9-a.\n");
return 1;
}
for (addr = addrlo; addr <= addrhi; addr++) {
for (reg = reglo; reg <= reghi; reg++) {
if (miiphy_read(devname, addr, reg,
®s[reg - reglo]) != 0) {
ok = 0;
printf(
"Error reading from the PHY addr=%02x reg=%02x\n",
addr, reg);
rcode = 1;
}
}
if (ok)
MII_dump(regs, reglo, reghi);
printf("\n");
}
} else if (strncmp(op, "de", 2) == 0) {
if (argc == 2)
miiphy_listdev ();
else
miiphy_set_current_dev (argv[2]);
} else {
return CMD_RET_USAGE;
}
/*
* Save the parameters for repeats.
*/
last_op[0] = op[0];
last_op[1] = op[1];
last_addr_lo = addrlo;
last_addr_hi = addrhi;
last_reg_lo = reglo;
last_reg_hi = reghi;
last_data = data;
last_mask = mask;
return rcode;
}
/***************************************************/
U_BOOT_CMD(
mii, 6, 1, do_mii,
"MII utility commands",
"device - list available devices\n"
"mii device <devname> - set current device\n"
"mii info <addr> - display MII PHY info\n"
"mii read <addr> <reg> - read MII PHY <addr> register <reg>\n"
"mii write <addr> <reg> <data> - write MII PHY <addr> register <reg>\n"
"mii modify <addr> <reg> <data> <mask> - modify MII PHY <addr> register <reg>\n"
" updating bits identified in <mask>\n"
"mii dump <addr> <reg> - pretty-print <addr> <reg> (0-5 only)\n"
"Addr and/or reg may be ranges, e.g. 2-7."
);