3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * This provides a bit-banged interface to the ethernet MII management
32 #if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII)
34 /*****************************************************************************
36 * Read the OUI, manufacture's model number, and revision number.
38 * OUI: 22 bits (unsigned int)
39 * Model: 6 bits (unsigned char)
40 * Revision: 4 bits (unsigned char)
45 int miiphy_info (unsigned char addr,
47 unsigned char *model, unsigned char *rev)
52 if (miiphy_read (addr, PHY_PHYIDR2, &tmp) != 0) {
54 puts ("PHY ID register 2 read failed\n");
61 printf ("PHY_PHYIDR2 @ 0x%x = 0x%04x\n", addr, reg);
64 /* No physical device present at this address */
68 if (miiphy_read (addr, PHY_PHYIDR1, &tmp) != 0) {
70 puts ("PHY ID register 1 read failed\n");
76 printf ("PHY_PHYIDR[1,2] @ 0x%x = 0x%08x\n", addr, reg);
79 *model = (unsigned char) ((reg >> 4) & 0x0000003F);
80 *rev = (unsigned char) ( reg & 0x0000000F);
85 /*****************************************************************************
91 int miiphy_reset (unsigned char addr)
96 if (miiphy_write (addr, PHY_BMCR, 0x8000) != 0) {
98 puts ("PHY reset failed\n");
102 #ifdef CONFIG_PHY_RESET_DELAY
103 udelay (CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
106 * Poll the control register for the reset bit to go to 0 (it is
107 * auto-clearing). This should happen within 0.5 seconds per the
112 while (((reg & 0x8000) != 0) && (loop_cnt++ < 1000000)) {
113 if (miiphy_read (addr, PHY_BMCR, ®) != 0) {
115 puts ("PHY status read failed\n");
120 if ((reg & 0x8000) == 0) {
123 puts ("PHY reset timed out\n");
130 /*****************************************************************************
132 * Determine the ethernet speed (10/100).
134 int miiphy_speed (unsigned char addr)
138 #if defined(CONFIG_PHY_GIGE)
139 if (miiphy_read (addr, PHY_1000BTSR, ®)) {
140 printf ("PHY 1000BT Status read failed\n");
143 if ((reg & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) !=0) {
148 #endif /* CONFIG_PHY_GIGE */
150 /* Check Basic Management Control Register first. */
151 if (miiphy_read (addr, PHY_BMCR, ®)) {
152 puts ("PHY speed read failed, assuming 10bT\n");
155 /* Check if auto-negotiation is on. */
156 if ((reg & PHY_BMCR_AUTON) != 0) {
157 /* Get auto-negotiation results. */
158 if (miiphy_read (addr, PHY_ANLPAR, ®)) {
159 puts ("PHY AN speed read failed, assuming 10bT\n");
162 if ((reg & PHY_ANLPAR_100) != 0) {
168 /* Get speed from basic control settings. */
169 else if (reg & PHY_BMCR_100MB) {
178 /*****************************************************************************
180 * Determine full/half duplex.
182 int miiphy_duplex (unsigned char addr)
186 #if defined(CONFIG_PHY_GIGE)
187 if (miiphy_read (addr, PHY_1000BTSR, ®)) {
188 printf ("PHY 1000BT Status read failed\n");
190 if ( (reg != 0xFFFF) &&
191 (reg & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) ) {
192 if ((reg & PHY_1000BTSR_1000FD) !=0) {
199 #endif /* CONFIG_PHY_GIGE */
201 /* Check Basic Management Control Register first. */
202 if (miiphy_read (addr, PHY_BMCR, ®)) {
203 puts ("PHY duplex read failed, assuming half duplex\n");
206 /* Check if auto-negotiation is on. */
207 if ((reg & PHY_BMCR_AUTON) != 0) {
208 /* Get auto-negotiation results. */
209 if (miiphy_read (addr, PHY_ANLPAR, ®)) {
210 puts ("PHY AN duplex read failed, assuming half duplex\n");
214 if ((reg & (PHY_ANLPAR_10FD | PHY_ANLPAR_TXFD)) != 0) {
220 /* Get speed from basic control settings. */
221 else if (reg & PHY_BMCR_DPLX) {
229 #ifdef CFG_FAULT_ECHO_LINK_DOWN
230 /*****************************************************************************
232 * Determine link status
234 int miiphy_link (unsigned char addr)
238 /* dummy read; needed to latch some phys */
239 (void)miiphy_read(addr, PHY_BMSR, ®);
240 if (miiphy_read (addr, PHY_BMSR, ®)) {
241 puts ("PHY_BMSR read failed, assuming no link\n");
245 /* Determine if a link is active */
246 if ((reg & PHY_BMSR_LS) != 0) {
254 #endif /* CONFIG_MII || (CONFIG_COMMANDS & CFG_CMD_MII) */