Commit | Line | Data |
---|---|---|
02d320c3 | 1 | /* MDIO Bus interface |
00db8189 AF |
2 | * |
3 | * Author: Andy Fleming | |
4 | * | |
5 | * Copyright (c) 2004 Freescale Semiconductor, Inc. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2 of the License, or (at your | |
10 | * option) any later version. | |
11 | * | |
12 | */ | |
8d242488 JP |
13 | |
14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
15 | ||
00db8189 | 16 | #include <linux/kernel.h> |
00db8189 AF |
17 | #include <linux/string.h> |
18 | #include <linux/errno.h> | |
19 | #include <linux/unistd.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/delay.h> | |
3d1e4db2 | 24 | #include <linux/device.h> |
a30e2c18 | 25 | #include <linux/of_device.h> |
4085a7f0 | 26 | #include <linux/of_mdio.h> |
00db8189 AF |
27 | #include <linux/netdevice.h> |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/skbuff.h> | |
30 | #include <linux/spinlock.h> | |
31 | #include <linux/mm.h> | |
32 | #include <linux/module.h> | |
00db8189 AF |
33 | #include <linux/mii.h> |
34 | #include <linux/ethtool.h> | |
35 | #include <linux/phy.h> | |
02d320c3 SS |
36 | #include <linux/io.h> |
37 | #include <linux/uaccess.h> | |
00db8189 | 38 | |
00db8189 | 39 | #include <asm/irq.h> |
00db8189 | 40 | |
298cf9be | 41 | /** |
eb8a54a7 | 42 | * mdiobus_alloc_size - allocate a mii_bus structure |
af58f1d6 RD |
43 | * @size: extra amount of memory to allocate for private storage. |
44 | * If non-zero, then bus->priv is points to that memory. | |
298cf9be LB |
45 | * |
46 | * Description: called by a bus driver to allocate an mii_bus | |
47 | * structure to fill in. | |
48 | */ | |
eb8a54a7 | 49 | struct mii_bus *mdiobus_alloc_size(size_t size) |
298cf9be | 50 | { |
46abc021 | 51 | struct mii_bus *bus; |
eb8a54a7 TT |
52 | size_t aligned_size = ALIGN(sizeof(*bus), NETDEV_ALIGN); |
53 | size_t alloc_size; | |
54 | ||
55 | /* If we alloc extra space, it should be aligned */ | |
56 | if (size) | |
57 | alloc_size = aligned_size + size; | |
58 | else | |
59 | alloc_size = sizeof(*bus); | |
46abc021 | 60 | |
eb8a54a7 TT |
61 | bus = kzalloc(alloc_size, GFP_KERNEL); |
62 | if (bus) { | |
46abc021 | 63 | bus->state = MDIOBUS_ALLOCATED; |
eb8a54a7 TT |
64 | if (size) |
65 | bus->priv = (void *)bus + aligned_size; | |
66 | } | |
46abc021 LB |
67 | |
68 | return bus; | |
298cf9be | 69 | } |
eb8a54a7 | 70 | EXPORT_SYMBOL(mdiobus_alloc_size); |
298cf9be | 71 | |
6d48f44b GS |
72 | static void _devm_mdiobus_free(struct device *dev, void *res) |
73 | { | |
74 | mdiobus_free(*(struct mii_bus **)res); | |
75 | } | |
76 | ||
77 | static int devm_mdiobus_match(struct device *dev, void *res, void *data) | |
78 | { | |
79 | struct mii_bus **r = res; | |
80 | ||
81 | if (WARN_ON(!r || !*r)) | |
82 | return 0; | |
83 | ||
84 | return *r == data; | |
85 | } | |
86 | ||
87 | /** | |
88 | * devm_mdiobus_alloc_size - Resource-managed mdiobus_alloc_size() | |
89 | * @dev: Device to allocate mii_bus for | |
90 | * @sizeof_priv: Space to allocate for private structure. | |
91 | * | |
92 | * Managed mdiobus_alloc_size. mii_bus allocated with this function is | |
93 | * automatically freed on driver detach. | |
94 | * | |
95 | * If an mii_bus allocated with this function needs to be freed separately, | |
96 | * devm_mdiobus_free() must be used. | |
97 | * | |
98 | * RETURNS: | |
99 | * Pointer to allocated mii_bus on success, NULL on failure. | |
100 | */ | |
101 | struct mii_bus *devm_mdiobus_alloc_size(struct device *dev, int sizeof_priv) | |
102 | { | |
103 | struct mii_bus **ptr, *bus; | |
104 | ||
105 | ptr = devres_alloc(_devm_mdiobus_free, sizeof(*ptr), GFP_KERNEL); | |
106 | if (!ptr) | |
107 | return NULL; | |
108 | ||
109 | /* use raw alloc_dr for kmalloc caller tracing */ | |
110 | bus = mdiobus_alloc_size(sizeof_priv); | |
111 | if (bus) { | |
112 | *ptr = bus; | |
113 | devres_add(dev, ptr); | |
114 | } else { | |
115 | devres_free(ptr); | |
116 | } | |
117 | ||
118 | return bus; | |
119 | } | |
93dccc59 | 120 | EXPORT_SYMBOL_GPL(devm_mdiobus_alloc_size); |
6d48f44b GS |
121 | |
122 | /** | |
123 | * devm_mdiobus_free - Resource-managed mdiobus_free() | |
124 | * @dev: Device this mii_bus belongs to | |
125 | * @bus: the mii_bus associated with the device | |
126 | * | |
127 | * Free mii_bus allocated with devm_mdiobus_alloc_size(). | |
128 | */ | |
129 | void devm_mdiobus_free(struct device *dev, struct mii_bus *bus) | |
130 | { | |
131 | int rc; | |
132 | ||
133 | rc = devres_release(dev, _devm_mdiobus_free, | |
134 | devm_mdiobus_match, bus); | |
135 | WARN_ON(rc); | |
136 | } | |
137 | EXPORT_SYMBOL_GPL(devm_mdiobus_free); | |
138 | ||
46abc021 LB |
139 | /** |
140 | * mdiobus_release - mii_bus device release callback | |
78c36b15 | 141 | * @d: the target struct device that contains the mii_bus |
46abc021 LB |
142 | * |
143 | * Description: called when the last reference to an mii_bus is | |
144 | * dropped, to free the underlying memory. | |
145 | */ | |
146 | static void mdiobus_release(struct device *d) | |
147 | { | |
148 | struct mii_bus *bus = to_mii_bus(d); | |
161c8d2f KH |
149 | BUG_ON(bus->state != MDIOBUS_RELEASED && |
150 | /* for compatibility with error handling in drivers */ | |
151 | bus->state != MDIOBUS_ALLOCATED); | |
46abc021 LB |
152 | kfree(bus); |
153 | } | |
154 | ||
155 | static struct class mdio_bus_class = { | |
156 | .name = "mdio_bus", | |
157 | .dev_release = mdiobus_release, | |
158 | }; | |
159 | ||
b943fbb0 | 160 | #if IS_ENABLED(CONFIG_OF_MDIO) |
25106022 | 161 | /* Helper function for of_mdio_find_bus */ |
9f3b795a | 162 | static int of_mdio_bus_match(struct device *dev, const void *mdio_bus_np) |
25106022 DD |
163 | { |
164 | return dev->of_node == mdio_bus_np; | |
165 | } | |
166 | /** | |
167 | * of_mdio_find_bus - Given an mii_bus node, find the mii_bus. | |
f41ef2e7 | 168 | * @mdio_bus_np: Pointer to the mii_bus. |
25106022 DD |
169 | * |
170 | * Returns a pointer to the mii_bus, or NULL if none found. | |
171 | * | |
172 | * Because the association of a device_node and mii_bus is made via | |
173 | * of_mdiobus_register(), the mii_bus cannot be found before it is | |
174 | * registered with of_mdiobus_register(). | |
175 | * | |
176 | */ | |
177 | struct mii_bus *of_mdio_find_bus(struct device_node *mdio_bus_np) | |
178 | { | |
179 | struct device *d; | |
180 | ||
181 | if (!mdio_bus_np) | |
182 | return NULL; | |
183 | ||
184 | d = class_find_device(&mdio_bus_class, NULL, mdio_bus_np, | |
185 | of_mdio_bus_match); | |
186 | ||
187 | return d ? to_mii_bus(d) : NULL; | |
188 | } | |
189 | EXPORT_SYMBOL(of_mdio_find_bus); | |
d9daa247 DM |
190 | |
191 | /* Walk the list of subnodes of a mdio bus and look for a node that matches the | |
192 | * phy's address with its 'reg' property. If found, set the of_node pointer for | |
193 | * the phy. This allows auto-probed pyh devices to be supplied with information | |
194 | * passed in via DT. | |
195 | */ | |
196 | static void of_mdiobus_link_phydev(struct mii_bus *mdio, | |
197 | struct phy_device *phydev) | |
198 | { | |
199 | struct device *dev = &phydev->dev; | |
200 | struct device_node *child; | |
201 | ||
202 | if (dev->of_node || !mdio->dev.of_node) | |
203 | return; | |
204 | ||
205 | for_each_available_child_of_node(mdio->dev.of_node, child) { | |
206 | int addr; | |
207 | int ret; | |
208 | ||
209 | ret = of_property_read_u32(child, "reg", &addr); | |
210 | if (ret < 0) { | |
211 | dev_err(dev, "%s has invalid PHY address\n", | |
212 | child->full_name); | |
213 | continue; | |
214 | } | |
215 | ||
216 | /* A PHY must have a reg property in the range [0-31] */ | |
217 | if (addr >= PHY_MAX_ADDR) { | |
218 | dev_err(dev, "%s PHY address %i is too large\n", | |
219 | child->full_name, addr); | |
220 | continue; | |
221 | } | |
222 | ||
223 | if (addr == phydev->addr) { | |
224 | dev->of_node = child; | |
225 | return; | |
226 | } | |
227 | } | |
228 | } | |
229 | #else /* !IS_ENABLED(CONFIG_OF_MDIO) */ | |
230 | static inline void of_mdiobus_link_phydev(struct mii_bus *mdio, | |
231 | struct phy_device *phydev) | |
232 | { | |
233 | } | |
25106022 DD |
234 | #endif |
235 | ||
b3df0da8 RD |
236 | /** |
237 | * mdiobus_register - bring up all the PHYs on a given bus and attach them to bus | |
238 | * @bus: target mii_bus | |
e1393456 | 239 | * |
b3df0da8 RD |
240 | * Description: Called by a bus driver to bring up all the PHYs |
241 | * on a given bus, and attach them to the bus. | |
242 | * | |
243 | * Returns 0 on success or < 0 on error. | |
e1393456 AF |
244 | */ |
245 | int mdiobus_register(struct mii_bus *bus) | |
246 | { | |
161c8d2f | 247 | int i, err; |
e1393456 | 248 | |
e1393456 | 249 | if (NULL == bus || NULL == bus->name || |
02d320c3 | 250 | NULL == bus->read || NULL == bus->write) |
e1393456 AF |
251 | return -EINVAL; |
252 | ||
46abc021 LB |
253 | BUG_ON(bus->state != MDIOBUS_ALLOCATED && |
254 | bus->state != MDIOBUS_UNREGISTERED); | |
255 | ||
256 | bus->dev.parent = bus->parent; | |
257 | bus->dev.class = &mdio_bus_class; | |
a71e3c37 | 258 | bus->dev.driver = bus->parent->driver; |
46abc021 | 259 | bus->dev.groups = NULL; |
036b6687 | 260 | dev_set_name(&bus->dev, "%s", bus->id); |
46abc021 LB |
261 | |
262 | err = device_register(&bus->dev); | |
263 | if (err) { | |
8d242488 | 264 | pr_err("mii_bus %s failed to register\n", bus->id); |
0c692d07 | 265 | put_device(&bus->dev); |
46abc021 LB |
266 | return -EINVAL; |
267 | } | |
268 | ||
d1e7fe4d AB |
269 | mutex_init(&bus->mdio_lock); |
270 | ||
e1393456 AF |
271 | if (bus->reset) |
272 | bus->reset(bus); | |
273 | ||
274 | for (i = 0; i < PHY_MAX_ADDR; i++) { | |
4fd5f812 LB |
275 | if ((bus->phy_mask & (1 << i)) == 0) { |
276 | struct phy_device *phydev; | |
e1393456 | 277 | |
4fd5f812 | 278 | phydev = mdiobus_scan(bus, i); |
161c8d2f | 279 | if (IS_ERR(phydev)) { |
4fd5f812 | 280 | err = PTR_ERR(phydev); |
161c8d2f KH |
281 | goto error; |
282 | } | |
64b1c2b4 | 283 | } |
e1393456 AF |
284 | } |
285 | ||
161c8d2f | 286 | bus->state = MDIOBUS_REGISTERED; |
e1393456 | 287 | pr_info("%s: probed\n", bus->name); |
161c8d2f | 288 | return 0; |
e1393456 | 289 | |
161c8d2f KH |
290 | error: |
291 | while (--i >= 0) { | |
292 | if (bus->phy_map[i]) | |
293 | device_unregister(&bus->phy_map[i]->dev); | |
294 | } | |
295 | device_del(&bus->dev); | |
e1393456 AF |
296 | return err; |
297 | } | |
298 | EXPORT_SYMBOL(mdiobus_register); | |
299 | ||
300 | void mdiobus_unregister(struct mii_bus *bus) | |
301 | { | |
302 | int i; | |
303 | ||
46abc021 LB |
304 | BUG_ON(bus->state != MDIOBUS_REGISTERED); |
305 | bus->state = MDIOBUS_UNREGISTERED; | |
306 | ||
3e44017b | 307 | device_del(&bus->dev); |
e1393456 | 308 | for (i = 0; i < PHY_MAX_ADDR; i++) { |
6f4a7f41 | 309 | if (bus->phy_map[i]) |
e1393456 | 310 | device_unregister(&bus->phy_map[i]->dev); |
4dea547f | 311 | bus->phy_map[i] = NULL; |
e1393456 AF |
312 | } |
313 | } | |
314 | EXPORT_SYMBOL(mdiobus_unregister); | |
315 | ||
298cf9be LB |
316 | /** |
317 | * mdiobus_free - free a struct mii_bus | |
318 | * @bus: mii_bus to free | |
319 | * | |
46abc021 LB |
320 | * This function releases the reference to the underlying device |
321 | * object in the mii_bus. If this is the last reference, the mii_bus | |
322 | * will be freed. | |
298cf9be LB |
323 | */ |
324 | void mdiobus_free(struct mii_bus *bus) | |
325 | { | |
02d320c3 | 326 | /* For compatibility with error handling in drivers. */ |
46abc021 LB |
327 | if (bus->state == MDIOBUS_ALLOCATED) { |
328 | kfree(bus); | |
329 | return; | |
330 | } | |
331 | ||
332 | BUG_ON(bus->state != MDIOBUS_UNREGISTERED); | |
333 | bus->state = MDIOBUS_RELEASED; | |
334 | ||
335 | put_device(&bus->dev); | |
298cf9be LB |
336 | } |
337 | EXPORT_SYMBOL(mdiobus_free); | |
338 | ||
4fd5f812 LB |
339 | struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr) |
340 | { | |
341 | struct phy_device *phydev; | |
342 | int err; | |
343 | ||
ac28b9f8 | 344 | phydev = get_phy_device(bus, addr, false); |
4fd5f812 LB |
345 | if (IS_ERR(phydev) || phydev == NULL) |
346 | return phydev; | |
347 | ||
86f6cf41 DM |
348 | /* |
349 | * For DT, see if the auto-probed phy has a correspoding child | |
350 | * in the bus node, and set the of_node pointer in this case. | |
351 | */ | |
352 | of_mdiobus_link_phydev(bus, phydev); | |
353 | ||
4dea547f | 354 | err = phy_device_register(phydev); |
4fd5f812 | 355 | if (err) { |
4fd5f812 | 356 | phy_device_free(phydev); |
4dea547f | 357 | return NULL; |
4fd5f812 LB |
358 | } |
359 | ||
4fd5f812 LB |
360 | return phydev; |
361 | } | |
362 | EXPORT_SYMBOL(mdiobus_scan); | |
363 | ||
2e888103 LB |
364 | /** |
365 | * mdiobus_read - Convenience function for reading a given MII mgmt register | |
366 | * @bus: the mii_bus struct | |
367 | * @addr: the phy address | |
368 | * @regnum: register number to read | |
369 | * | |
370 | * NOTE: MUST NOT be called from interrupt context, | |
371 | * because the bus read/write functions may wait for an interrupt | |
372 | * to conclude the operation. | |
373 | */ | |
abf35df2 | 374 | int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum) |
2e888103 LB |
375 | { |
376 | int retval; | |
377 | ||
378 | BUG_ON(in_interrupt()); | |
379 | ||
380 | mutex_lock(&bus->mdio_lock); | |
381 | retval = bus->read(bus, addr, regnum); | |
382 | mutex_unlock(&bus->mdio_lock); | |
383 | ||
384 | return retval; | |
385 | } | |
386 | EXPORT_SYMBOL(mdiobus_read); | |
387 | ||
388 | /** | |
389 | * mdiobus_write - Convenience function for writing a given MII mgmt register | |
390 | * @bus: the mii_bus struct | |
391 | * @addr: the phy address | |
392 | * @regnum: register number to write | |
393 | * @val: value to write to @regnum | |
394 | * | |
395 | * NOTE: MUST NOT be called from interrupt context, | |
396 | * because the bus read/write functions may wait for an interrupt | |
397 | * to conclude the operation. | |
398 | */ | |
abf35df2 | 399 | int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val) |
2e888103 LB |
400 | { |
401 | int err; | |
402 | ||
403 | BUG_ON(in_interrupt()); | |
404 | ||
405 | mutex_lock(&bus->mdio_lock); | |
406 | err = bus->write(bus, addr, regnum, val); | |
407 | mutex_unlock(&bus->mdio_lock); | |
408 | ||
409 | return err; | |
410 | } | |
411 | EXPORT_SYMBOL(mdiobus_write); | |
412 | ||
b3df0da8 RD |
413 | /** |
414 | * mdio_bus_match - determine if given PHY driver supports the given PHY device | |
415 | * @dev: target PHY device | |
416 | * @drv: given PHY driver | |
00db8189 | 417 | * |
b3df0da8 RD |
418 | * Description: Given a PHY device, and a PHY driver, return 1 if |
419 | * the driver supports the device. Otherwise, return 0. | |
00db8189 AF |
420 | */ |
421 | static int mdio_bus_match(struct device *dev, struct device_driver *drv) | |
422 | { | |
423 | struct phy_device *phydev = to_phy_device(dev); | |
424 | struct phy_driver *phydrv = to_phy_driver(drv); | |
425 | ||
a30e2c18 DD |
426 | if (of_driver_match_device(dev, drv)) |
427 | return 1; | |
428 | ||
429 | if (phydrv->match_phy_device) | |
430 | return phydrv->match_phy_device(phydev); | |
431 | ||
6f901b73 FF |
432 | return (phydrv->phy_id & phydrv->phy_id_mask) == |
433 | (phydev->phy_id & phydrv->phy_id_mask); | |
00db8189 AF |
434 | } |
435 | ||
2f5cb434 AV |
436 | #ifdef CONFIG_PM |
437 | ||
3d1e4db2 AV |
438 | static bool mdio_bus_phy_may_suspend(struct phy_device *phydev) |
439 | { | |
440 | struct device_driver *drv = phydev->dev.driver; | |
441 | struct phy_driver *phydrv = to_phy_driver(drv); | |
442 | struct net_device *netdev = phydev->attached_dev; | |
443 | ||
444 | if (!drv || !phydrv->suspend) | |
445 | return false; | |
446 | ||
447 | /* PHY not attached? May suspend. */ | |
448 | if (!netdev) | |
449 | return true; | |
450 | ||
02d320c3 | 451 | /* Don't suspend PHY if the attched netdev parent may wakeup. |
3d1e4db2 AV |
452 | * The parent may point to a PCI device, as in tg3 driver. |
453 | */ | |
454 | if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent)) | |
455 | return false; | |
456 | ||
02d320c3 | 457 | /* Also don't suspend PHY if the netdev itself may wakeup. This |
3d1e4db2 AV |
458 | * is the case for devices w/o underlaying pwr. mgmt. aware bus, |
459 | * e.g. SoC devices. | |
460 | */ | |
461 | if (device_may_wakeup(&netdev->dev)) | |
462 | return false; | |
463 | ||
464 | return true; | |
465 | } | |
466 | ||
2f5cb434 | 467 | static int mdio_bus_suspend(struct device *dev) |
00db8189 | 468 | { |
3d1e4db2 | 469 | struct phy_driver *phydrv = to_phy_driver(dev->driver); |
0f0ca340 | 470 | struct phy_device *phydev = to_phy_device(dev); |
00db8189 | 471 | |
02d320c3 | 472 | /* We must stop the state machine manually, otherwise it stops out of |
541cd3ee AV |
473 | * control, possibly with the phydev->lock held. Upon resume, netdev |
474 | * may call phy routines that try to grab the same lock, and that may | |
475 | * lead to a deadlock. | |
476 | */ | |
fddd9101 | 477 | if (phydev->attached_dev && phydev->adjust_link) |
541cd3ee AV |
478 | phy_stop_machine(phydev); |
479 | ||
3d1e4db2 AV |
480 | if (!mdio_bus_phy_may_suspend(phydev)) |
481 | return 0; | |
541cd3ee | 482 | |
3d1e4db2 | 483 | return phydrv->suspend(phydev); |
00db8189 AF |
484 | } |
485 | ||
2f5cb434 | 486 | static int mdio_bus_resume(struct device *dev) |
00db8189 | 487 | { |
3d1e4db2 | 488 | struct phy_driver *phydrv = to_phy_driver(dev->driver); |
0f0ca340 | 489 | struct phy_device *phydev = to_phy_device(dev); |
541cd3ee | 490 | int ret; |
00db8189 | 491 | |
3d1e4db2 | 492 | if (!mdio_bus_phy_may_suspend(phydev)) |
541cd3ee AV |
493 | goto no_resume; |
494 | ||
495 | ret = phydrv->resume(phydev); | |
496 | if (ret < 0) | |
497 | return ret; | |
498 | ||
499 | no_resume: | |
fddd9101 | 500 | if (phydev->attached_dev && phydev->adjust_link) |
29935aeb | 501 | phy_start_machine(phydev); |
541cd3ee AV |
502 | |
503 | return 0; | |
00db8189 AF |
504 | } |
505 | ||
2f5cb434 AV |
506 | static int mdio_bus_restore(struct device *dev) |
507 | { | |
508 | struct phy_device *phydev = to_phy_device(dev); | |
509 | struct net_device *netdev = phydev->attached_dev; | |
510 | int ret; | |
511 | ||
512 | if (!netdev) | |
513 | return 0; | |
514 | ||
515 | ret = phy_init_hw(phydev); | |
516 | if (ret < 0) | |
517 | return ret; | |
518 | ||
519 | /* The PHY needs to renegotiate. */ | |
520 | phydev->link = 0; | |
521 | phydev->state = PHY_UP; | |
522 | ||
29935aeb | 523 | phy_start_machine(phydev); |
2f5cb434 AV |
524 | |
525 | return 0; | |
526 | } | |
527 | ||
02d320c3 | 528 | static const struct dev_pm_ops mdio_bus_pm_ops = { |
2f5cb434 AV |
529 | .suspend = mdio_bus_suspend, |
530 | .resume = mdio_bus_resume, | |
531 | .freeze = mdio_bus_suspend, | |
532 | .thaw = mdio_bus_resume, | |
533 | .restore = mdio_bus_restore, | |
534 | }; | |
535 | ||
536 | #define MDIO_BUS_PM_OPS (&mdio_bus_pm_ops) | |
537 | ||
538 | #else | |
539 | ||
540 | #define MDIO_BUS_PM_OPS NULL | |
541 | ||
542 | #endif /* CONFIG_PM */ | |
543 | ||
56277f40 NB |
544 | static ssize_t |
545 | phy_id_show(struct device *dev, struct device_attribute *attr, char *buf) | |
546 | { | |
547 | struct phy_device *phydev = to_phy_device(dev); | |
548 | ||
549 | return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id); | |
550 | } | |
4192c749 | 551 | static DEVICE_ATTR_RO(phy_id); |
56277f40 | 552 | |
3d055d8d FF |
553 | static ssize_t |
554 | phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf) | |
555 | { | |
556 | struct phy_device *phydev = to_phy_device(dev); | |
557 | ||
558 | return sprintf(buf, "%s\n", phy_modes(phydev->interface)); | |
559 | } | |
560 | static DEVICE_ATTR_RO(phy_interface); | |
561 | ||
8bed1285 FF |
562 | static ssize_t |
563 | phy_has_fixups_show(struct device *dev, struct device_attribute *attr, char *buf) | |
564 | { | |
565 | struct phy_device *phydev = to_phy_device(dev); | |
566 | ||
567 | return sprintf(buf, "%d\n", phydev->has_fixups); | |
568 | } | |
569 | static DEVICE_ATTR_RO(phy_has_fixups); | |
570 | ||
4192c749 GKH |
571 | static struct attribute *mdio_dev_attrs[] = { |
572 | &dev_attr_phy_id.attr, | |
3d055d8d | 573 | &dev_attr_phy_interface.attr, |
8bed1285 | 574 | &dev_attr_phy_has_fixups.attr, |
4192c749 | 575 | NULL, |
56277f40 | 576 | }; |
4192c749 | 577 | ATTRIBUTE_GROUPS(mdio_dev); |
56277f40 | 578 | |
00db8189 AF |
579 | struct bus_type mdio_bus_type = { |
580 | .name = "mdio_bus", | |
581 | .match = mdio_bus_match, | |
2f5cb434 | 582 | .pm = MDIO_BUS_PM_OPS, |
4192c749 | 583 | .dev_groups = mdio_dev_groups, |
00db8189 | 584 | }; |
11b0bacd | 585 | EXPORT_SYMBOL(mdio_bus_type); |
00db8189 | 586 | |
67c4f3fa | 587 | int __init mdio_bus_init(void) |
00db8189 | 588 | { |
46abc021 LB |
589 | int ret; |
590 | ||
591 | ret = class_register(&mdio_bus_class); | |
592 | if (!ret) { | |
593 | ret = bus_register(&mdio_bus_type); | |
594 | if (ret) | |
595 | class_unregister(&mdio_bus_class); | |
596 | } | |
597 | ||
598 | return ret; | |
00db8189 AF |
599 | } |
600 | ||
dc85dec6 | 601 | void mdio_bus_exit(void) |
e1393456 | 602 | { |
46abc021 | 603 | class_unregister(&mdio_bus_class); |
e1393456 AF |
604 | bus_unregister(&mdio_bus_type); |
605 | } |