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) || defined(CONFIG_CMD_MII)
33 #include <asm/types.h>
34 #include <linux/list.h>
38 /* local debug macro */
43 #define debug(fmt,args...) printf (fmt ,##args)
45 #define debug(fmt,args...)
46 #endif /* MII_DEBUG */
49 struct list_head link;
51 int (*read) (char *devname, unsigned char addr,
52 unsigned char reg, unsigned short *value);
53 int (*write) (char *devname, unsigned char addr,
54 unsigned char reg, unsigned short value);
57 static struct list_head mii_devs;
58 static struct mii_dev *current_mii;
60 /*****************************************************************************
62 * Initialize global data. Need to be called before any other miiphy routine.
66 INIT_LIST_HEAD (&mii_devs);
70 /*****************************************************************************
72 * Register read and write MII access routines for the device <name>.
74 void miiphy_register (char *name,
75 int (*read) (char *devname, unsigned char addr,
76 unsigned char reg, unsigned short *value),
77 int (*write) (char *devname, unsigned char addr,
78 unsigned char reg, unsigned short value))
80 struct list_head *entry;
81 struct mii_dev *new_dev;
82 struct mii_dev *miidev;
83 unsigned int name_len;
85 /* check if we have unique name */
86 list_for_each (entry, &mii_devs) {
87 miidev = list_entry (entry, struct mii_dev, link);
88 if (strcmp (miidev->name, name) == 0) {
89 printf ("miiphy_register: non unique device name "
96 name_len = strlen (name);
98 (struct mii_dev *)malloc (sizeof (struct mii_dev) + name_len + 1);
100 if (new_dev == NULL) {
101 printf ("miiphy_register: cannot allocate memory for '%s'\n",
105 memset (new_dev, 0, sizeof (struct mii_dev) + name_len);
107 /* initalize mii_dev struct fields */
108 INIT_LIST_HEAD (&new_dev->link);
109 new_dev->read = read;
110 new_dev->write = write;
111 new_dev->name = (char *)(new_dev + 1);
112 strncpy (new_dev->name, name, name_len);
113 new_dev->name[name_len] = '\0';
115 debug ("miiphy_register: added '%s', read=0x%08lx, write=0x%08lx\n",
116 new_dev->name, new_dev->read, new_dev->write);
118 /* add it to the list */
119 list_add_tail (&new_dev->link, &mii_devs);
122 current_mii = new_dev;
125 int miiphy_set_current_dev (char *devname)
127 struct list_head *entry;
130 list_for_each (entry, &mii_devs) {
131 dev = list_entry (entry, struct mii_dev, link);
133 if (strcmp (devname, dev->name) == 0) {
139 printf ("No such device: %s\n", devname);
143 char *miiphy_get_current_dev ()
146 return current_mii->name;
151 /*****************************************************************************
153 * Read to variable <value> from the PHY attached to device <devname>,
154 * use PHY address <addr> and register <reg>.
159 int miiphy_read (char *devname, unsigned char addr, unsigned char reg,
160 unsigned short *value)
162 struct list_head *entry;
168 printf ("NULL device name!\n");
172 list_for_each (entry, &mii_devs) {
173 dev = list_entry (entry, struct mii_dev, link);
175 if (strcmp (devname, dev->name) == 0) {
177 read_ret = dev->read (devname, addr, reg, value);
183 printf ("No such device: %s\n", devname);
185 return ((found_dev) ? read_ret : 1);
188 /*****************************************************************************
190 * Write <value> to the PHY attached to device <devname>,
191 * use PHY address <addr> and register <reg>.
196 int miiphy_write (char *devname, unsigned char addr, unsigned char reg,
197 unsigned short value)
199 struct list_head *entry;
205 printf ("NULL device name!\n");
209 list_for_each (entry, &mii_devs) {
210 dev = list_entry (entry, struct mii_dev, link);
212 if (strcmp (devname, dev->name) == 0) {
214 write_ret = dev->write (devname, addr, reg, value);
220 printf ("No such device: %s\n", devname);
222 return ((found_dev) ? write_ret : 1);
225 /*****************************************************************************
227 * Print out list of registered MII capable devices.
229 void miiphy_listdev (void)
231 struct list_head *entry;
234 puts ("MII devices: ");
235 list_for_each (entry, &mii_devs) {
236 dev = list_entry (entry, struct mii_dev, link);
237 printf ("'%s' ", dev->name);
242 printf ("Current device: '%s'\n", current_mii->name);
245 /*****************************************************************************
247 * Read the OUI, manufacture's model number, and revision number.
249 * OUI: 22 bits (unsigned int)
250 * Model: 6 bits (unsigned char)
251 * Revision: 4 bits (unsigned char)
256 int miiphy_info (char *devname, unsigned char addr, unsigned int *oui,
257 unsigned char *model, unsigned char *rev)
259 unsigned int reg = 0;
262 if (miiphy_read (devname, addr, PHY_PHYIDR2, &tmp) != 0) {
263 debug ("PHY ID register 2 read failed\n");
268 debug ("PHY_PHYIDR2 @ 0x%x = 0x%04x\n", addr, reg);
271 /* No physical device present at this address */
275 if (miiphy_read (devname, addr, PHY_PHYIDR1, &tmp) != 0) {
276 debug ("PHY ID register 1 read failed\n");
280 debug ("PHY_PHYIDR[1,2] @ 0x%x = 0x%08x\n", addr, reg);
283 *model = (unsigned char)((reg >> 4) & 0x0000003F);
284 *rev = (unsigned char)(reg & 0x0000000F);
288 /*****************************************************************************
294 int miiphy_reset (char *devname, unsigned char addr)
299 if (miiphy_read (devname, addr, PHY_BMCR, ®) != 0) {
300 debug ("PHY status read failed\n");
303 if (miiphy_write (devname, addr, PHY_BMCR, reg | 0x8000) != 0) {
304 debug ("PHY reset failed\n");
307 #ifdef CONFIG_PHY_RESET_DELAY
308 udelay (CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
311 * Poll the control register for the reset bit to go to 0 (it is
312 * auto-clearing). This should happen within 0.5 seconds per the
317 while (((reg & 0x8000) != 0) && (loop_cnt++ < 1000000)) {
318 if (miiphy_read (devname, addr, PHY_BMCR, ®) != 0) {
319 debug ("PHY status read failed\n");
323 if ((reg & 0x8000) == 0) {
326 puts ("PHY reset timed out\n");
332 /*****************************************************************************
334 * Determine the ethernet speed (10/100/1000). Return 10 on error.
336 int miiphy_speed (char *devname, unsigned char addr)
340 #if defined(CONFIG_PHY_GIGE)
344 * Check for 1000BASE-X. If it is supported, then assume that the speed
347 if (miiphy_is_1000base_x (devname, addr)) {
351 * No 1000BASE-X, so assume 1000BASE-T/100BASE-TX/10BASE-T register set.
353 /* Check for 1000BASE-T. */
354 if (miiphy_read (devname, addr, PHY_1000BTSR, &btsr)) {
355 printf ("PHY 1000BT status");
356 goto miiphy_read_failed;
358 if (btsr != 0xFFFF &&
359 (btsr & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD))) {
362 #endif /* CONFIG_PHY_GIGE */
364 /* Check Basic Management Control Register first. */
365 if (miiphy_read (devname, addr, PHY_BMCR, &bmcr)) {
366 printf ("PHY speed");
367 goto miiphy_read_failed;
369 /* Check if auto-negotiation is on. */
370 if (bmcr & PHY_BMCR_AUTON) {
371 /* Get auto-negotiation results. */
372 if (miiphy_read (devname, addr, PHY_ANLPAR, &anlpar)) {
373 printf ("PHY AN speed");
374 goto miiphy_read_failed;
376 return (anlpar & PHY_ANLPAR_100) ? _100BASET : _10BASET;
378 /* Get speed from basic control settings. */
379 return (bmcr & PHY_BMCR_100MB) ? _100BASET : _10BASET;
382 printf (" read failed, assuming 10BASE-T\n");
386 /*****************************************************************************
388 * Determine full/half duplex. Return half on error.
390 int miiphy_duplex (char *devname, unsigned char addr)
394 #if defined(CONFIG_PHY_GIGE)
397 /* Check for 1000BASE-X. */
398 if (miiphy_is_1000base_x (devname, addr)) {
400 if (miiphy_read (devname, addr, PHY_ANLPAR, &anlpar)) {
401 printf ("1000BASE-X PHY AN duplex");
402 goto miiphy_read_failed;
406 * No 1000BASE-X, so assume 1000BASE-T/100BASE-TX/10BASE-T register set.
408 /* Check for 1000BASE-T. */
409 if (miiphy_read (devname, addr, PHY_1000BTSR, &btsr)) {
410 printf ("PHY 1000BT status");
411 goto miiphy_read_failed;
413 if (btsr != 0xFFFF) {
414 if (btsr & PHY_1000BTSR_1000FD) {
416 } else if (btsr & PHY_1000BTSR_1000HD) {
420 #endif /* CONFIG_PHY_GIGE */
422 /* Check Basic Management Control Register first. */
423 if (miiphy_read (devname, addr, PHY_BMCR, &bmcr)) {
425 goto miiphy_read_failed;
427 /* Check if auto-negotiation is on. */
428 if (bmcr & PHY_BMCR_AUTON) {
429 /* Get auto-negotiation results. */
430 if (miiphy_read (devname, addr, PHY_ANLPAR, &anlpar)) {
431 puts ("PHY AN duplex");
432 goto miiphy_read_failed;
434 return (anlpar & (PHY_ANLPAR_10FD | PHY_ANLPAR_TXFD)) ?
437 /* Get speed from basic control settings. */
438 return (bmcr & PHY_BMCR_DPLX) ? FULL : HALF;
441 printf (" read failed, assuming half duplex\n");
445 /*****************************************************************************
447 * Return 1 if PHY supports 1000BASE-X, 0 if PHY supports 10BASE-T/100BASE-TX/
448 * 1000BASE-T, or on error.
450 int miiphy_is_1000base_x (char *devname, unsigned char addr)
452 #if defined(CONFIG_PHY_GIGE)
455 if (miiphy_read (devname, addr, PHY_EXSR, &exsr)) {
456 printf ("PHY extended status read failed, assuming no "
460 return 0 != (exsr & (PHY_EXSR_1000XF | PHY_EXSR_1000XH));
466 #ifdef CFG_FAULT_ECHO_LINK_DOWN
467 /*****************************************************************************
469 * Determine link status
471 int miiphy_link (char *devname, unsigned char addr)
475 /* dummy read; needed to latch some phys */
476 (void)miiphy_read (devname, addr, PHY_BMSR, ®);
477 if (miiphy_read (devname, addr, PHY_BMSR, ®)) {
478 puts ("PHY_BMSR read failed, assuming no link\n");
482 /* Determine if a link is active */
483 if ((reg & PHY_BMSR_LS) != 0) {
490 #endif /* CONFIG_MII */