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git.ipfire.org Git - people/ms/u-boot.git/blob - common/miiphyutil.c
3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
5 * SPDX-License-Identifier: GPL-2.0+
9 * This provides a bit-banged interface to the ethernet MII management
18 #include <asm/types.h>
19 #include <linux/list.h>
23 /* local debug macro */
28 #define debug(fmt, args...) printf(fmt, ##args)
30 #define debug(fmt, args...)
31 #endif /* MII_DEBUG */
33 static struct list_head mii_devs
;
34 static struct mii_dev
*current_mii
;
37 * Lookup the mii_dev struct by the registered device name.
39 struct mii_dev
*miiphy_get_dev_by_name(const char *devname
)
41 struct list_head
*entry
;
45 printf("NULL device name!\n");
49 list_for_each(entry
, &mii_devs
) {
50 dev
= list_entry(entry
, struct mii_dev
, link
);
51 if (strcmp(dev
->name
, devname
) == 0)
58 /*****************************************************************************
60 * Initialize global data. Need to be called before any other miiphy routine.
62 void miiphy_init(void)
64 INIT_LIST_HEAD(&mii_devs
);
68 static int legacy_miiphy_read(struct mii_dev
*bus
, int addr
, int devad
, int reg
)
72 struct legacy_mii_dev
*ldev
= bus
->priv
;
74 ret
= ldev
->read(bus
->name
, addr
, reg
, &val
);
76 return ret
? -1 : (int)val
;
79 static int legacy_miiphy_write(struct mii_dev
*bus
, int addr
, int devad
,
82 struct legacy_mii_dev
*ldev
= bus
->priv
;
84 return ldev
->write(bus
->name
, addr
, reg
, val
);
87 /*****************************************************************************
89 * Register read and write MII access routines for the device <name>.
90 * This API is now deprecated. Please use mdio_alloc and mdio_register, instead.
92 void miiphy_register(const char *name
,
93 int (*read
)(const char *devname
, unsigned char addr
,
94 unsigned char reg
, unsigned short *value
),
95 int (*write
)(const char *devname
, unsigned char addr
,
96 unsigned char reg
, unsigned short value
))
98 struct mii_dev
*new_dev
;
99 struct legacy_mii_dev
*ldev
;
101 BUG_ON(strlen(name
) >= MDIO_NAME_LEN
);
103 /* check if we have unique name */
104 new_dev
= miiphy_get_dev_by_name(name
);
106 printf("miiphy_register: non unique device name '%s'\n", name
);
110 /* allocate memory */
111 new_dev
= mdio_alloc();
112 ldev
= malloc(sizeof(*ldev
));
114 if (new_dev
== NULL
|| ldev
== NULL
) {
115 printf("miiphy_register: cannot allocate memory for '%s'\n",
120 /* initalize mii_dev struct fields */
121 new_dev
->read
= legacy_miiphy_read
;
122 new_dev
->write
= legacy_miiphy_write
;
123 strncpy(new_dev
->name
, name
, MDIO_NAME_LEN
);
124 new_dev
->name
[MDIO_NAME_LEN
- 1] = 0;
127 new_dev
->priv
= ldev
;
129 debug("miiphy_register: added '%s', read=0x%08lx, write=0x%08lx\n",
130 new_dev
->name
, ldev
->read
, ldev
->write
);
132 /* add it to the list */
133 list_add_tail(&new_dev
->link
, &mii_devs
);
136 current_mii
= new_dev
;
139 struct mii_dev
*mdio_alloc(void)
143 bus
= malloc(sizeof(*bus
));
147 memset(bus
, 0, sizeof(*bus
));
149 /* initalize mii_dev struct fields */
150 INIT_LIST_HEAD(&bus
->link
);
155 void mdio_free(struct mii_dev
*bus
)
160 int mdio_register(struct mii_dev
*bus
)
162 if (!bus
|| !bus
->name
|| !bus
->read
|| !bus
->write
)
165 /* check if we have unique name */
166 if (miiphy_get_dev_by_name(bus
->name
)) {
167 printf("mdio_register: non unique device name '%s'\n",
172 /* add it to the list */
173 list_add_tail(&bus
->link
, &mii_devs
);
181 int mdio_unregister(struct mii_dev
*bus
)
186 /* delete it from the list */
187 list_del(&bus
->link
);
189 if (current_mii
== bus
)
195 void mdio_list_devices(void)
197 struct list_head
*entry
;
199 list_for_each(entry
, &mii_devs
) {
201 struct mii_dev
*bus
= list_entry(entry
, struct mii_dev
, link
);
203 printf("%s:\n", bus
->name
);
205 for (i
= 0; i
< PHY_MAX_ADDR
; i
++) {
206 struct phy_device
*phydev
= bus
->phymap
[i
];
209 printf("%d - %s", i
, phydev
->drv
->name
);
212 printf(" <--> %s\n", phydev
->dev
->name
);
220 int miiphy_set_current_dev(const char *devname
)
224 dev
= miiphy_get_dev_by_name(devname
);
230 printf("No such device: %s\n", devname
);
235 struct mii_dev
*mdio_get_current_dev(void)
240 struct phy_device
*mdio_phydev_for_ethname(const char *ethname
)
242 struct list_head
*entry
;
245 list_for_each(entry
, &mii_devs
) {
247 bus
= list_entry(entry
, struct mii_dev
, link
);
249 for (i
= 0; i
< PHY_MAX_ADDR
; i
++) {
250 if (!bus
->phymap
[i
] || !bus
->phymap
[i
]->dev
)
253 if (strcmp(bus
->phymap
[i
]->dev
->name
, ethname
) == 0)
254 return bus
->phymap
[i
];
258 printf("%s is not a known ethernet\n", ethname
);
262 const char *miiphy_get_current_dev(void)
265 return current_mii
->name
;
270 static struct mii_dev
*miiphy_get_active_dev(const char *devname
)
272 /* If the current mii is the one we want, return it */
274 if (strcmp(current_mii
->name
, devname
) == 0)
277 /* Otherwise, set the active one to the one we want */
278 if (miiphy_set_current_dev(devname
))
284 /*****************************************************************************
286 * Read to variable <value> from the PHY attached to device <devname>,
287 * use PHY address <addr> and register <reg>.
289 * This API is deprecated. Use phy_read on a phy_device found via phy_connect
294 int miiphy_read(const char *devname
, unsigned char addr
, unsigned char reg
,
295 unsigned short *value
)
300 bus
= miiphy_get_active_dev(devname
);
304 ret
= bus
->read(bus
, addr
, MDIO_DEVAD_NONE
, reg
);
308 *value
= (unsigned short)ret
;
312 /*****************************************************************************
314 * Write <value> to the PHY attached to device <devname>,
315 * use PHY address <addr> and register <reg>.
317 * This API is deprecated. Use phy_write on a phy_device found by phy_connect
322 int miiphy_write(const char *devname
, unsigned char addr
, unsigned char reg
,
323 unsigned short value
)
327 bus
= miiphy_get_active_dev(devname
);
329 return bus
->write(bus
, addr
, MDIO_DEVAD_NONE
, reg
, value
);
334 /*****************************************************************************
336 * Print out list of registered MII capable devices.
338 void miiphy_listdev(void)
340 struct list_head
*entry
;
343 puts("MII devices: ");
344 list_for_each(entry
, &mii_devs
) {
345 dev
= list_entry(entry
, struct mii_dev
, link
);
346 printf("'%s' ", dev
->name
);
351 printf("Current device: '%s'\n", current_mii
->name
);
354 /*****************************************************************************
356 * Read the OUI, manufacture's model number, and revision number.
358 * OUI: 22 bits (unsigned int)
359 * Model: 6 bits (unsigned char)
360 * Revision: 4 bits (unsigned char)
362 * This API is deprecated.
367 int miiphy_info(const char *devname
, unsigned char addr
, unsigned int *oui
,
368 unsigned char *model
, unsigned char *rev
)
370 unsigned int reg
= 0;
373 if (miiphy_read(devname
, addr
, MII_PHYSID2
, &tmp
) != 0) {
374 debug("PHY ID register 2 read failed\n");
379 debug("MII_PHYSID2 @ 0x%x = 0x%04x\n", addr
, reg
);
382 /* No physical device present at this address */
386 if (miiphy_read(devname
, addr
, MII_PHYSID1
, &tmp
) != 0) {
387 debug("PHY ID register 1 read failed\n");
391 debug("PHY_PHYIDR[1,2] @ 0x%x = 0x%08x\n", addr
, reg
);
394 *model
= (unsigned char)((reg
>> 4) & 0x0000003F);
395 *rev
= (unsigned char)(reg
& 0x0000000F);
399 #ifndef CONFIG_PHYLIB
400 /*****************************************************************************
404 * This API is deprecated. Use PHYLIB.
409 int miiphy_reset(const char *devname
, unsigned char addr
)
414 if (miiphy_read(devname
, addr
, MII_BMCR
, ®
) != 0) {
415 debug("PHY status read failed\n");
418 if (miiphy_write(devname
, addr
, MII_BMCR
, reg
| BMCR_RESET
) != 0) {
419 debug("PHY reset failed\n");
422 #ifdef CONFIG_PHY_RESET_DELAY
423 udelay(CONFIG_PHY_RESET_DELAY
); /* Intel LXT971A needs this */
426 * Poll the control register for the reset bit to go to 0 (it is
427 * auto-clearing). This should happen within 0.5 seconds per the
431 while (((reg
& 0x8000) != 0) && timeout
--) {
432 if (miiphy_read(devname
, addr
, MII_BMCR
, ®
) != 0) {
433 debug("PHY status read failed\n");
438 if ((reg
& 0x8000) == 0) {
441 puts("PHY reset timed out\n");
448 /*****************************************************************************
450 * Determine the ethernet speed (10/100/1000). Return 10 on error.
452 int miiphy_speed(const char *devname
, unsigned char addr
)
456 #if defined(CONFIG_PHY_GIGE)
460 * Check for 1000BASE-X. If it is supported, then assume that the speed
463 if (miiphy_is_1000base_x(devname
, addr
))
467 * No 1000BASE-X, so assume 1000BASE-T/100BASE-TX/10BASE-T register set.
469 /* Check for 1000BASE-T. */
470 if (miiphy_read(devname
, addr
, MII_STAT1000
, &btsr
)) {
471 printf("PHY 1000BT status");
472 goto miiphy_read_failed
;
474 if (btsr
!= 0xFFFF &&
475 (btsr
& (PHY_1000BTSR_1000FD
| PHY_1000BTSR_1000HD
)))
477 #endif /* CONFIG_PHY_GIGE */
479 /* Check Basic Management Control Register first. */
480 if (miiphy_read(devname
, addr
, MII_BMCR
, &bmcr
)) {
482 goto miiphy_read_failed
;
484 /* Check if auto-negotiation is on. */
485 if (bmcr
& BMCR_ANENABLE
) {
486 /* Get auto-negotiation results. */
487 if (miiphy_read(devname
, addr
, MII_LPA
, &anlpar
)) {
488 printf("PHY AN speed");
489 goto miiphy_read_failed
;
491 return (anlpar
& LPA_100
) ? _100BASET
: _10BASET
;
493 /* Get speed from basic control settings. */
494 return (bmcr
& BMCR_SPEED100
) ? _100BASET
: _10BASET
;
497 printf(" read failed, assuming 10BASE-T\n");
501 /*****************************************************************************
503 * Determine full/half duplex. Return half on error.
505 int miiphy_duplex(const char *devname
, unsigned char addr
)
509 #if defined(CONFIG_PHY_GIGE)
512 /* Check for 1000BASE-X. */
513 if (miiphy_is_1000base_x(devname
, addr
)) {
515 if (miiphy_read(devname
, addr
, MII_LPA
, &anlpar
)) {
516 printf("1000BASE-X PHY AN duplex");
517 goto miiphy_read_failed
;
521 * No 1000BASE-X, so assume 1000BASE-T/100BASE-TX/10BASE-T register set.
523 /* Check for 1000BASE-T. */
524 if (miiphy_read(devname
, addr
, MII_STAT1000
, &btsr
)) {
525 printf("PHY 1000BT status");
526 goto miiphy_read_failed
;
528 if (btsr
!= 0xFFFF) {
529 if (btsr
& PHY_1000BTSR_1000FD
) {
531 } else if (btsr
& PHY_1000BTSR_1000HD
) {
535 #endif /* CONFIG_PHY_GIGE */
537 /* Check Basic Management Control Register first. */
538 if (miiphy_read(devname
, addr
, MII_BMCR
, &bmcr
)) {
540 goto miiphy_read_failed
;
542 /* Check if auto-negotiation is on. */
543 if (bmcr
& BMCR_ANENABLE
) {
544 /* Get auto-negotiation results. */
545 if (miiphy_read(devname
, addr
, MII_LPA
, &anlpar
)) {
546 puts("PHY AN duplex");
547 goto miiphy_read_failed
;
549 return (anlpar
& (LPA_10FULL
| LPA_100FULL
)) ?
552 /* Get speed from basic control settings. */
553 return (bmcr
& BMCR_FULLDPLX
) ? FULL
: HALF
;
556 printf(" read failed, assuming half duplex\n");
560 /*****************************************************************************
562 * Return 1 if PHY supports 1000BASE-X, 0 if PHY supports 10BASE-T/100BASE-TX/
563 * 1000BASE-T, or on error.
565 int miiphy_is_1000base_x(const char *devname
, unsigned char addr
)
567 #if defined(CONFIG_PHY_GIGE)
570 if (miiphy_read(devname
, addr
, MII_ESTATUS
, &exsr
)) {
571 printf("PHY extended status read failed, assuming no "
575 return 0 != (exsr
& (ESTATUS_1000XF
| ESTATUS_1000XH
));
581 #ifdef CONFIG_SYS_FAULT_ECHO_LINK_DOWN
582 /*****************************************************************************
584 * Determine link status
586 int miiphy_link(const char *devname
, unsigned char addr
)
590 /* dummy read; needed to latch some phys */
591 (void)miiphy_read(devname
, addr
, MII_BMSR
, ®
);
592 if (miiphy_read(devname
, addr
, MII_BMSR
, ®
)) {
593 puts("MII_BMSR read failed, assuming no link\n");
597 /* Determine if a link is active */
598 if ((reg
& BMSR_LSTATUS
) != 0) {