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1 | /* Framework for finding and configuring PHYs. | |
2 | * Also contains generic PHY driver | |
3 | * | |
4 | * Author: Andy Fleming | |
5 | * | |
6 | * Copyright (c) 2004 Freescale Semiconductor, Inc. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | */ | |
14 | ||
15 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/string.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/unistd.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/delay.h> | |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/etherdevice.h> | |
27 | #include <linux/skbuff.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/mii.h> | |
31 | #include <linux/ethtool.h> | |
32 | #include <linux/phy.h> | |
33 | #include <linux/phy_led_triggers.h> | |
34 | #include <linux/mdio.h> | |
35 | #include <linux/io.h> | |
36 | #include <linux/uaccess.h> | |
37 | #include <linux/of.h> | |
38 | ||
39 | #include <asm/irq.h> | |
40 | ||
41 | MODULE_DESCRIPTION("PHY library"); | |
42 | MODULE_AUTHOR("Andy Fleming"); | |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
45 | void phy_device_free(struct phy_device *phydev) | |
46 | { | |
47 | put_device(&phydev->mdio.dev); | |
48 | } | |
49 | EXPORT_SYMBOL(phy_device_free); | |
50 | ||
51 | static void phy_mdio_device_free(struct mdio_device *mdiodev) | |
52 | { | |
53 | struct phy_device *phydev; | |
54 | ||
55 | phydev = container_of(mdiodev, struct phy_device, mdio); | |
56 | phy_device_free(phydev); | |
57 | } | |
58 | ||
59 | static void phy_device_release(struct device *dev) | |
60 | { | |
61 | kfree(to_phy_device(dev)); | |
62 | } | |
63 | ||
64 | static void phy_mdio_device_remove(struct mdio_device *mdiodev) | |
65 | { | |
66 | struct phy_device *phydev; | |
67 | ||
68 | phydev = container_of(mdiodev, struct phy_device, mdio); | |
69 | phy_device_remove(phydev); | |
70 | } | |
71 | ||
72 | enum genphy_driver { | |
73 | GENPHY_DRV_1G, | |
74 | GENPHY_DRV_10G, | |
75 | GENPHY_DRV_MAX | |
76 | }; | |
77 | ||
78 | static struct phy_driver genphy_driver[GENPHY_DRV_MAX]; | |
79 | ||
80 | static LIST_HEAD(phy_fixup_list); | |
81 | static DEFINE_MUTEX(phy_fixup_lock); | |
82 | ||
83 | #ifdef CONFIG_PM | |
84 | static bool mdio_bus_phy_may_suspend(struct phy_device *phydev) | |
85 | { | |
86 | struct device_driver *drv = phydev->mdio.dev.driver; | |
87 | struct phy_driver *phydrv = to_phy_driver(drv); | |
88 | struct net_device *netdev = phydev->attached_dev; | |
89 | ||
90 | if (!drv || !phydrv->suspend) | |
91 | return false; | |
92 | ||
93 | /* PHY not attached? May suspend if the PHY has not already been | |
94 | * suspended as part of a prior call to phy_disconnect() -> | |
95 | * phy_detach() -> phy_suspend() because the parent netdev might be the | |
96 | * MDIO bus driver and clock gated at this point. | |
97 | */ | |
98 | if (!netdev) | |
99 | return !phydev->suspended; | |
100 | ||
101 | /* Don't suspend PHY if the attached netdev parent may wakeup. | |
102 | * The parent may point to a PCI device, as in tg3 driver. | |
103 | */ | |
104 | if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent)) | |
105 | return false; | |
106 | ||
107 | /* Also don't suspend PHY if the netdev itself may wakeup. This | |
108 | * is the case for devices w/o underlaying pwr. mgmt. aware bus, | |
109 | * e.g. SoC devices. | |
110 | */ | |
111 | if (device_may_wakeup(&netdev->dev)) | |
112 | return false; | |
113 | ||
114 | return true; | |
115 | } | |
116 | ||
117 | static int mdio_bus_phy_suspend(struct device *dev) | |
118 | { | |
119 | struct phy_device *phydev = to_phy_device(dev); | |
120 | ||
121 | /* We must stop the state machine manually, otherwise it stops out of | |
122 | * control, possibly with the phydev->lock held. Upon resume, netdev | |
123 | * may call phy routines that try to grab the same lock, and that may | |
124 | * lead to a deadlock. | |
125 | */ | |
126 | if (phydev->attached_dev && phydev->adjust_link) | |
127 | phy_stop_machine(phydev); | |
128 | ||
129 | if (!mdio_bus_phy_may_suspend(phydev)) | |
130 | return 0; | |
131 | ||
132 | return phy_suspend(phydev); | |
133 | } | |
134 | ||
135 | static int mdio_bus_phy_resume(struct device *dev) | |
136 | { | |
137 | struct phy_device *phydev = to_phy_device(dev); | |
138 | int ret; | |
139 | ||
140 | if (!mdio_bus_phy_may_suspend(phydev)) | |
141 | goto no_resume; | |
142 | ||
143 | ret = phy_resume(phydev); | |
144 | if (ret < 0) | |
145 | return ret; | |
146 | ||
147 | no_resume: | |
148 | if (phydev->attached_dev && phydev->adjust_link) | |
149 | phy_start_machine(phydev); | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | static int mdio_bus_phy_restore(struct device *dev) | |
155 | { | |
156 | struct phy_device *phydev = to_phy_device(dev); | |
157 | struct net_device *netdev = phydev->attached_dev; | |
158 | int ret; | |
159 | ||
160 | if (!netdev) | |
161 | return 0; | |
162 | ||
163 | ret = phy_init_hw(phydev); | |
164 | if (ret < 0) | |
165 | return ret; | |
166 | ||
167 | /* The PHY needs to renegotiate. */ | |
168 | phydev->link = 0; | |
169 | phydev->state = PHY_UP; | |
170 | ||
171 | phy_start_machine(phydev); | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | static const struct dev_pm_ops mdio_bus_phy_pm_ops = { | |
177 | .suspend = mdio_bus_phy_suspend, | |
178 | .resume = mdio_bus_phy_resume, | |
179 | .freeze = mdio_bus_phy_suspend, | |
180 | .thaw = mdio_bus_phy_resume, | |
181 | .restore = mdio_bus_phy_restore, | |
182 | }; | |
183 | ||
184 | #define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops) | |
185 | ||
186 | #else | |
187 | ||
188 | #define MDIO_BUS_PHY_PM_OPS NULL | |
189 | ||
190 | #endif /* CONFIG_PM */ | |
191 | ||
192 | /** | |
193 | * phy_register_fixup - creates a new phy_fixup and adds it to the list | |
194 | * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID) | |
195 | * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) | |
196 | * It can also be PHY_ANY_UID | |
197 | * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before | |
198 | * comparison | |
199 | * @run: The actual code to be run when a matching PHY is found | |
200 | */ | |
201 | int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, | |
202 | int (*run)(struct phy_device *)) | |
203 | { | |
204 | struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); | |
205 | ||
206 | if (!fixup) | |
207 | return -ENOMEM; | |
208 | ||
209 | strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); | |
210 | fixup->phy_uid = phy_uid; | |
211 | fixup->phy_uid_mask = phy_uid_mask; | |
212 | fixup->run = run; | |
213 | ||
214 | mutex_lock(&phy_fixup_lock); | |
215 | list_add_tail(&fixup->list, &phy_fixup_list); | |
216 | mutex_unlock(&phy_fixup_lock); | |
217 | ||
218 | return 0; | |
219 | } | |
220 | EXPORT_SYMBOL(phy_register_fixup); | |
221 | ||
222 | /* Registers a fixup to be run on any PHY with the UID in phy_uid */ | |
223 | int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, | |
224 | int (*run)(struct phy_device *)) | |
225 | { | |
226 | return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); | |
227 | } | |
228 | EXPORT_SYMBOL(phy_register_fixup_for_uid); | |
229 | ||
230 | /* Registers a fixup to be run on the PHY with id string bus_id */ | |
231 | int phy_register_fixup_for_id(const char *bus_id, | |
232 | int (*run)(struct phy_device *)) | |
233 | { | |
234 | return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); | |
235 | } | |
236 | EXPORT_SYMBOL(phy_register_fixup_for_id); | |
237 | ||
238 | /** | |
239 | * phy_unregister_fixup - remove a phy_fixup from the list | |
240 | * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list | |
241 | * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list | |
242 | * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison | |
243 | */ | |
244 | int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask) | |
245 | { | |
246 | struct list_head *pos, *n; | |
247 | struct phy_fixup *fixup; | |
248 | int ret; | |
249 | ||
250 | ret = -ENODEV; | |
251 | ||
252 | mutex_lock(&phy_fixup_lock); | |
253 | list_for_each_safe(pos, n, &phy_fixup_list) { | |
254 | fixup = list_entry(pos, struct phy_fixup, list); | |
255 | ||
256 | if ((!strcmp(fixup->bus_id, bus_id)) && | |
257 | ((fixup->phy_uid & phy_uid_mask) == | |
258 | (phy_uid & phy_uid_mask))) { | |
259 | list_del(&fixup->list); | |
260 | kfree(fixup); | |
261 | ret = 0; | |
262 | break; | |
263 | } | |
264 | } | |
265 | mutex_unlock(&phy_fixup_lock); | |
266 | ||
267 | return ret; | |
268 | } | |
269 | EXPORT_SYMBOL(phy_unregister_fixup); | |
270 | ||
271 | /* Unregisters a fixup of any PHY with the UID in phy_uid */ | |
272 | int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask) | |
273 | { | |
274 | return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask); | |
275 | } | |
276 | EXPORT_SYMBOL(phy_unregister_fixup_for_uid); | |
277 | ||
278 | /* Unregisters a fixup of the PHY with id string bus_id */ | |
279 | int phy_unregister_fixup_for_id(const char *bus_id) | |
280 | { | |
281 | return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff); | |
282 | } | |
283 | EXPORT_SYMBOL(phy_unregister_fixup_for_id); | |
284 | ||
285 | /* Returns 1 if fixup matches phydev in bus_id and phy_uid. | |
286 | * Fixups can be set to match any in one or more fields. | |
287 | */ | |
288 | static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) | |
289 | { | |
290 | if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0) | |
291 | if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) | |
292 | return 0; | |
293 | ||
294 | if ((fixup->phy_uid & fixup->phy_uid_mask) != | |
295 | (phydev->phy_id & fixup->phy_uid_mask)) | |
296 | if (fixup->phy_uid != PHY_ANY_UID) | |
297 | return 0; | |
298 | ||
299 | return 1; | |
300 | } | |
301 | ||
302 | /* Runs any matching fixups for this phydev */ | |
303 | static int phy_scan_fixups(struct phy_device *phydev) | |
304 | { | |
305 | struct phy_fixup *fixup; | |
306 | ||
307 | mutex_lock(&phy_fixup_lock); | |
308 | list_for_each_entry(fixup, &phy_fixup_list, list) { | |
309 | if (phy_needs_fixup(phydev, fixup)) { | |
310 | int err = fixup->run(phydev); | |
311 | ||
312 | if (err < 0) { | |
313 | mutex_unlock(&phy_fixup_lock); | |
314 | return err; | |
315 | } | |
316 | phydev->has_fixups = true; | |
317 | } | |
318 | } | |
319 | mutex_unlock(&phy_fixup_lock); | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | static int phy_bus_match(struct device *dev, struct device_driver *drv) | |
325 | { | |
326 | struct phy_device *phydev = to_phy_device(dev); | |
327 | struct phy_driver *phydrv = to_phy_driver(drv); | |
328 | const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids); | |
329 | int i; | |
330 | ||
331 | if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY)) | |
332 | return 0; | |
333 | ||
334 | if (phydrv->match_phy_device) | |
335 | return phydrv->match_phy_device(phydev); | |
336 | ||
337 | if (phydev->is_c45) { | |
338 | for (i = 1; i < num_ids; i++) { | |
339 | if (!(phydev->c45_ids.devices_in_package & (1 << i))) | |
340 | continue; | |
341 | ||
342 | if ((phydrv->phy_id & phydrv->phy_id_mask) == | |
343 | (phydev->c45_ids.device_ids[i] & | |
344 | phydrv->phy_id_mask)) | |
345 | return 1; | |
346 | } | |
347 | return 0; | |
348 | } else { | |
349 | return (phydrv->phy_id & phydrv->phy_id_mask) == | |
350 | (phydev->phy_id & phydrv->phy_id_mask); | |
351 | } | |
352 | } | |
353 | ||
354 | struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id, | |
355 | bool is_c45, | |
356 | struct phy_c45_device_ids *c45_ids) | |
357 | { | |
358 | struct phy_device *dev; | |
359 | struct mdio_device *mdiodev; | |
360 | ||
361 | /* We allocate the device, and initialize the default values */ | |
362 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
363 | if (!dev) | |
364 | return ERR_PTR(-ENOMEM); | |
365 | ||
366 | mdiodev = &dev->mdio; | |
367 | mdiodev->dev.release = phy_device_release; | |
368 | mdiodev->dev.parent = &bus->dev; | |
369 | mdiodev->dev.bus = &mdio_bus_type; | |
370 | mdiodev->bus = bus; | |
371 | mdiodev->pm_ops = MDIO_BUS_PHY_PM_OPS; | |
372 | mdiodev->bus_match = phy_bus_match; | |
373 | mdiodev->addr = addr; | |
374 | mdiodev->flags = MDIO_DEVICE_FLAG_PHY; | |
375 | mdiodev->device_free = phy_mdio_device_free; | |
376 | mdiodev->device_remove = phy_mdio_device_remove; | |
377 | ||
378 | dev->speed = 0; | |
379 | dev->duplex = -1; | |
380 | dev->pause = 0; | |
381 | dev->asym_pause = 0; | |
382 | dev->link = 1; | |
383 | dev->interface = PHY_INTERFACE_MODE_GMII; | |
384 | ||
385 | dev->autoneg = AUTONEG_ENABLE; | |
386 | ||
387 | dev->is_c45 = is_c45; | |
388 | dev->phy_id = phy_id; | |
389 | if (c45_ids) | |
390 | dev->c45_ids = *c45_ids; | |
391 | dev->irq = bus->irq[addr]; | |
392 | dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr); | |
393 | ||
394 | dev->state = PHY_DOWN; | |
395 | ||
396 | mutex_init(&dev->lock); | |
397 | INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); | |
398 | INIT_WORK(&dev->phy_queue, phy_change_work); | |
399 | ||
400 | /* Request the appropriate module unconditionally; don't | |
401 | * bother trying to do so only if it isn't already loaded, | |
402 | * because that gets complicated. A hotplug event would have | |
403 | * done an unconditional modprobe anyway. | |
404 | * We don't do normal hotplug because it won't work for MDIO | |
405 | * -- because it relies on the device staying around for long | |
406 | * enough for the driver to get loaded. With MDIO, the NIC | |
407 | * driver will get bored and give up as soon as it finds that | |
408 | * there's no driver _already_ loaded. | |
409 | */ | |
410 | request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id)); | |
411 | ||
412 | device_initialize(&mdiodev->dev); | |
413 | ||
414 | return dev; | |
415 | } | |
416 | EXPORT_SYMBOL(phy_device_create); | |
417 | ||
418 | /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers. | |
419 | * @bus: the target MII bus | |
420 | * @addr: PHY address on the MII bus | |
421 | * @dev_addr: MMD address in the PHY. | |
422 | * @devices_in_package: where to store the devices in package information. | |
423 | * | |
424 | * Description: reads devices in package registers of a MMD at @dev_addr | |
425 | * from PHY at @addr on @bus. | |
426 | * | |
427 | * Returns: 0 on success, -EIO on failure. | |
428 | */ | |
429 | static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr, | |
430 | u32 *devices_in_package) | |
431 | { | |
432 | int phy_reg, reg_addr; | |
433 | ||
434 | reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2; | |
435 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
436 | if (phy_reg < 0) | |
437 | return -EIO; | |
438 | *devices_in_package = (phy_reg & 0xffff) << 16; | |
439 | ||
440 | reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1; | |
441 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
442 | if (phy_reg < 0) | |
443 | return -EIO; | |
444 | *devices_in_package |= (phy_reg & 0xffff); | |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
449 | /** | |
450 | * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. | |
451 | * @bus: the target MII bus | |
452 | * @addr: PHY address on the MII bus | |
453 | * @phy_id: where to store the ID retrieved. | |
454 | * @c45_ids: where to store the c45 ID information. | |
455 | * | |
456 | * If the PHY devices-in-package appears to be valid, it and the | |
457 | * corresponding identifiers are stored in @c45_ids, zero is stored | |
458 | * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns | |
459 | * zero on success. | |
460 | * | |
461 | */ | |
462 | static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id, | |
463 | struct phy_c45_device_ids *c45_ids) { | |
464 | int phy_reg; | |
465 | int i, reg_addr; | |
466 | const int num_ids = ARRAY_SIZE(c45_ids->device_ids); | |
467 | u32 *devs = &c45_ids->devices_in_package; | |
468 | ||
469 | /* Find first non-zero Devices In package. Device zero is reserved | |
470 | * for 802.3 c45 complied PHYs, so don't probe it at first. | |
471 | */ | |
472 | for (i = 1; i < num_ids && *devs == 0; i++) { | |
473 | phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs); | |
474 | if (phy_reg < 0) | |
475 | return -EIO; | |
476 | ||
477 | if ((*devs & 0x1fffffff) == 0x1fffffff) { | |
478 | /* If mostly Fs, there is no device there, | |
479 | * then let's continue to probe more, as some | |
480 | * 10G PHYs have zero Devices In package, | |
481 | * e.g. Cortina CS4315/CS4340 PHY. | |
482 | */ | |
483 | phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs); | |
484 | if (phy_reg < 0) | |
485 | return -EIO; | |
486 | /* no device there, let's get out of here */ | |
487 | if ((*devs & 0x1fffffff) == 0x1fffffff) { | |
488 | *phy_id = 0xffffffff; | |
489 | return 0; | |
490 | } else { | |
491 | break; | |
492 | } | |
493 | } | |
494 | } | |
495 | ||
496 | /* Now probe Device Identifiers for each device present. */ | |
497 | for (i = 1; i < num_ids; i++) { | |
498 | if (!(c45_ids->devices_in_package & (1 << i))) | |
499 | continue; | |
500 | ||
501 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1; | |
502 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
503 | if (phy_reg < 0) | |
504 | return -EIO; | |
505 | c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16; | |
506 | ||
507 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2; | |
508 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
509 | if (phy_reg < 0) | |
510 | return -EIO; | |
511 | c45_ids->device_ids[i] |= (phy_reg & 0xffff); | |
512 | } | |
513 | *phy_id = 0; | |
514 | return 0; | |
515 | } | |
516 | ||
517 | /** | |
518 | * get_phy_id - reads the specified addr for its ID. | |
519 | * @bus: the target MII bus | |
520 | * @addr: PHY address on the MII bus | |
521 | * @phy_id: where to store the ID retrieved. | |
522 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol | |
523 | * @c45_ids: where to store the c45 ID information. | |
524 | * | |
525 | * Description: In the case of a 802.3-c22 PHY, reads the ID registers | |
526 | * of the PHY at @addr on the @bus, stores it in @phy_id and returns | |
527 | * zero on success. | |
528 | * | |
529 | * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and | |
530 | * its return value is in turn returned. | |
531 | * | |
532 | */ | |
533 | static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id, | |
534 | bool is_c45, struct phy_c45_device_ids *c45_ids) | |
535 | { | |
536 | int phy_reg; | |
537 | ||
538 | if (is_c45) | |
539 | return get_phy_c45_ids(bus, addr, phy_id, c45_ids); | |
540 | ||
541 | /* Grab the bits from PHYIR1, and put them in the upper half */ | |
542 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); | |
543 | if (phy_reg < 0) | |
544 | return -EIO; | |
545 | ||
546 | *phy_id = (phy_reg & 0xffff) << 16; | |
547 | ||
548 | /* Grab the bits from PHYIR2, and put them in the lower half */ | |
549 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); | |
550 | if (phy_reg < 0) | |
551 | return -EIO; | |
552 | ||
553 | *phy_id |= (phy_reg & 0xffff); | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
558 | /** | |
559 | * get_phy_device - reads the specified PHY device and returns its @phy_device | |
560 | * struct | |
561 | * @bus: the target MII bus | |
562 | * @addr: PHY address on the MII bus | |
563 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol | |
564 | * | |
565 | * Description: Reads the ID registers of the PHY at @addr on the | |
566 | * @bus, then allocates and returns the phy_device to represent it. | |
567 | */ | |
568 | struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) | |
569 | { | |
570 | struct phy_c45_device_ids c45_ids = {0}; | |
571 | u32 phy_id = 0; | |
572 | int r; | |
573 | ||
574 | r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids); | |
575 | if (r) | |
576 | return ERR_PTR(r); | |
577 | ||
578 | /* If the phy_id is mostly Fs, there is no device there */ | |
579 | if ((phy_id & 0x1fffffff) == 0x1fffffff) | |
580 | return ERR_PTR(-ENODEV); | |
581 | ||
582 | return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); | |
583 | } | |
584 | EXPORT_SYMBOL(get_phy_device); | |
585 | ||
586 | static ssize_t | |
587 | phy_id_show(struct device *dev, struct device_attribute *attr, char *buf) | |
588 | { | |
589 | struct phy_device *phydev = to_phy_device(dev); | |
590 | ||
591 | return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id); | |
592 | } | |
593 | static DEVICE_ATTR_RO(phy_id); | |
594 | ||
595 | static ssize_t | |
596 | phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf) | |
597 | { | |
598 | struct phy_device *phydev = to_phy_device(dev); | |
599 | const char *mode = NULL; | |
600 | ||
601 | if (phy_is_internal(phydev)) | |
602 | mode = "internal"; | |
603 | else | |
604 | mode = phy_modes(phydev->interface); | |
605 | ||
606 | return sprintf(buf, "%s\n", mode); | |
607 | } | |
608 | static DEVICE_ATTR_RO(phy_interface); | |
609 | ||
610 | static ssize_t | |
611 | phy_has_fixups_show(struct device *dev, struct device_attribute *attr, | |
612 | char *buf) | |
613 | { | |
614 | struct phy_device *phydev = to_phy_device(dev); | |
615 | ||
616 | return sprintf(buf, "%d\n", phydev->has_fixups); | |
617 | } | |
618 | static DEVICE_ATTR_RO(phy_has_fixups); | |
619 | ||
620 | static struct attribute *phy_dev_attrs[] = { | |
621 | &dev_attr_phy_id.attr, | |
622 | &dev_attr_phy_interface.attr, | |
623 | &dev_attr_phy_has_fixups.attr, | |
624 | NULL, | |
625 | }; | |
626 | ATTRIBUTE_GROUPS(phy_dev); | |
627 | ||
628 | /** | |
629 | * phy_device_register - Register the phy device on the MDIO bus | |
630 | * @phydev: phy_device structure to be added to the MDIO bus | |
631 | */ | |
632 | int phy_device_register(struct phy_device *phydev) | |
633 | { | |
634 | int err; | |
635 | ||
636 | err = mdiobus_register_device(&phydev->mdio); | |
637 | if (err) | |
638 | return err; | |
639 | ||
640 | /* Run all of the fixups for this PHY */ | |
641 | err = phy_scan_fixups(phydev); | |
642 | if (err) { | |
643 | pr_err("PHY %d failed to initialize\n", phydev->mdio.addr); | |
644 | goto out; | |
645 | } | |
646 | ||
647 | phydev->mdio.dev.groups = phy_dev_groups; | |
648 | ||
649 | err = device_add(&phydev->mdio.dev); | |
650 | if (err) { | |
651 | pr_err("PHY %d failed to add\n", phydev->mdio.addr); | |
652 | goto out; | |
653 | } | |
654 | ||
655 | return 0; | |
656 | ||
657 | out: | |
658 | mdiobus_unregister_device(&phydev->mdio); | |
659 | return err; | |
660 | } | |
661 | EXPORT_SYMBOL(phy_device_register); | |
662 | ||
663 | /** | |
664 | * phy_device_remove - Remove a previously registered phy device from the MDIO bus | |
665 | * @phydev: phy_device structure to remove | |
666 | * | |
667 | * This doesn't free the phy_device itself, it merely reverses the effects | |
668 | * of phy_device_register(). Use phy_device_free() to free the device | |
669 | * after calling this function. | |
670 | */ | |
671 | void phy_device_remove(struct phy_device *phydev) | |
672 | { | |
673 | device_del(&phydev->mdio.dev); | |
674 | mdiobus_unregister_device(&phydev->mdio); | |
675 | } | |
676 | EXPORT_SYMBOL(phy_device_remove); | |
677 | ||
678 | /** | |
679 | * phy_find_first - finds the first PHY device on the bus | |
680 | * @bus: the target MII bus | |
681 | */ | |
682 | struct phy_device *phy_find_first(struct mii_bus *bus) | |
683 | { | |
684 | struct phy_device *phydev; | |
685 | int addr; | |
686 | ||
687 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { | |
688 | phydev = mdiobus_get_phy(bus, addr); | |
689 | if (phydev) | |
690 | return phydev; | |
691 | } | |
692 | return NULL; | |
693 | } | |
694 | EXPORT_SYMBOL(phy_find_first); | |
695 | ||
696 | /** | |
697 | * phy_prepare_link - prepares the PHY layer to monitor link status | |
698 | * @phydev: target phy_device struct | |
699 | * @handler: callback function for link status change notifications | |
700 | * | |
701 | * Description: Tells the PHY infrastructure to handle the | |
702 | * gory details on monitoring link status (whether through | |
703 | * polling or an interrupt), and to call back to the | |
704 | * connected device driver when the link status changes. | |
705 | * If you want to monitor your own link state, don't call | |
706 | * this function. | |
707 | */ | |
708 | static void phy_prepare_link(struct phy_device *phydev, | |
709 | void (*handler)(struct net_device *)) | |
710 | { | |
711 | phydev->adjust_link = handler; | |
712 | } | |
713 | ||
714 | /** | |
715 | * phy_connect_direct - connect an ethernet device to a specific phy_device | |
716 | * @dev: the network device to connect | |
717 | * @phydev: the pointer to the phy device | |
718 | * @handler: callback function for state change notifications | |
719 | * @interface: PHY device's interface | |
720 | */ | |
721 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, | |
722 | void (*handler)(struct net_device *), | |
723 | phy_interface_t interface) | |
724 | { | |
725 | int rc; | |
726 | ||
727 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); | |
728 | if (rc) | |
729 | return rc; | |
730 | ||
731 | phy_prepare_link(phydev, handler); | |
732 | phy_start_machine(phydev); | |
733 | if (phydev->irq > 0) | |
734 | phy_start_interrupts(phydev); | |
735 | ||
736 | return 0; | |
737 | } | |
738 | EXPORT_SYMBOL(phy_connect_direct); | |
739 | ||
740 | /** | |
741 | * phy_connect - connect an ethernet device to a PHY device | |
742 | * @dev: the network device to connect | |
743 | * @bus_id: the id string of the PHY device to connect | |
744 | * @handler: callback function for state change notifications | |
745 | * @interface: PHY device's interface | |
746 | * | |
747 | * Description: Convenience function for connecting ethernet | |
748 | * devices to PHY devices. The default behavior is for | |
749 | * the PHY infrastructure to handle everything, and only notify | |
750 | * the connected driver when the link status changes. If you | |
751 | * don't want, or can't use the provided functionality, you may | |
752 | * choose to call only the subset of functions which provide | |
753 | * the desired functionality. | |
754 | */ | |
755 | struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, | |
756 | void (*handler)(struct net_device *), | |
757 | phy_interface_t interface) | |
758 | { | |
759 | struct phy_device *phydev; | |
760 | struct device *d; | |
761 | int rc; | |
762 | ||
763 | /* Search the list of PHY devices on the mdio bus for the | |
764 | * PHY with the requested name | |
765 | */ | |
766 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); | |
767 | if (!d) { | |
768 | pr_err("PHY %s not found\n", bus_id); | |
769 | return ERR_PTR(-ENODEV); | |
770 | } | |
771 | phydev = to_phy_device(d); | |
772 | ||
773 | rc = phy_connect_direct(dev, phydev, handler, interface); | |
774 | put_device(d); | |
775 | if (rc) | |
776 | return ERR_PTR(rc); | |
777 | ||
778 | return phydev; | |
779 | } | |
780 | EXPORT_SYMBOL(phy_connect); | |
781 | ||
782 | /** | |
783 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY | |
784 | * device | |
785 | * @phydev: target phy_device struct | |
786 | */ | |
787 | void phy_disconnect(struct phy_device *phydev) | |
788 | { | |
789 | if (phydev->irq > 0) | |
790 | phy_stop_interrupts(phydev); | |
791 | ||
792 | phy_stop_machine(phydev); | |
793 | ||
794 | phydev->adjust_link = NULL; | |
795 | ||
796 | phy_detach(phydev); | |
797 | } | |
798 | EXPORT_SYMBOL(phy_disconnect); | |
799 | ||
800 | /** | |
801 | * phy_poll_reset - Safely wait until a PHY reset has properly completed | |
802 | * @phydev: The PHY device to poll | |
803 | * | |
804 | * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as | |
805 | * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR | |
806 | * register must be polled until the BMCR_RESET bit clears. | |
807 | * | |
808 | * Furthermore, any attempts to write to PHY registers may have no effect | |
809 | * or even generate MDIO bus errors until this is complete. | |
810 | * | |
811 | * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the | |
812 | * standard and do not fully reset after the BMCR_RESET bit is set, and may | |
813 | * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an | |
814 | * effort to support such broken PHYs, this function is separate from the | |
815 | * standard phy_init_hw() which will zero all the other bits in the BMCR | |
816 | * and reapply all driver-specific and board-specific fixups. | |
817 | */ | |
818 | static int phy_poll_reset(struct phy_device *phydev) | |
819 | { | |
820 | /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ | |
821 | unsigned int retries = 12; | |
822 | int ret; | |
823 | ||
824 | do { | |
825 | msleep(50); | |
826 | ret = phy_read(phydev, MII_BMCR); | |
827 | if (ret < 0) | |
828 | return ret; | |
829 | } while (ret & BMCR_RESET && --retries); | |
830 | if (ret & BMCR_RESET) | |
831 | return -ETIMEDOUT; | |
832 | ||
833 | /* Some chips (smsc911x) may still need up to another 1ms after the | |
834 | * BMCR_RESET bit is cleared before they are usable. | |
835 | */ | |
836 | msleep(1); | |
837 | return 0; | |
838 | } | |
839 | ||
840 | int phy_init_hw(struct phy_device *phydev) | |
841 | { | |
842 | int ret = 0; | |
843 | ||
844 | if (!phydev->drv || !phydev->drv->config_init) | |
845 | return 0; | |
846 | ||
847 | if (phydev->drv->soft_reset) | |
848 | ret = phydev->drv->soft_reset(phydev); | |
849 | else | |
850 | ret = genphy_soft_reset(phydev); | |
851 | ||
852 | if (ret < 0) | |
853 | return ret; | |
854 | ||
855 | ret = phy_scan_fixups(phydev); | |
856 | if (ret < 0) | |
857 | return ret; | |
858 | ||
859 | return phydev->drv->config_init(phydev); | |
860 | } | |
861 | EXPORT_SYMBOL(phy_init_hw); | |
862 | ||
863 | void phy_attached_info(struct phy_device *phydev) | |
864 | { | |
865 | phy_attached_print(phydev, NULL); | |
866 | } | |
867 | EXPORT_SYMBOL(phy_attached_info); | |
868 | ||
869 | #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)" | |
870 | void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) | |
871 | { | |
872 | if (!fmt) { | |
873 | dev_info(&phydev->mdio.dev, ATTACHED_FMT "\n", | |
874 | phydev->drv->name, phydev_name(phydev), | |
875 | phydev->irq); | |
876 | } else { | |
877 | va_list ap; | |
878 | ||
879 | dev_info(&phydev->mdio.dev, ATTACHED_FMT, | |
880 | phydev->drv->name, phydev_name(phydev), | |
881 | phydev->irq); | |
882 | ||
883 | va_start(ap, fmt); | |
884 | vprintk(fmt, ap); | |
885 | va_end(ap); | |
886 | } | |
887 | } | |
888 | EXPORT_SYMBOL(phy_attached_print); | |
889 | ||
890 | /** | |
891 | * phy_attach_direct - attach a network device to a given PHY device pointer | |
892 | * @dev: network device to attach | |
893 | * @phydev: Pointer to phy_device to attach | |
894 | * @flags: PHY device's dev_flags | |
895 | * @interface: PHY device's interface | |
896 | * | |
897 | * Description: Called by drivers to attach to a particular PHY | |
898 | * device. The phy_device is found, and properly hooked up | |
899 | * to the phy_driver. If no driver is attached, then a | |
900 | * generic driver is used. The phy_device is given a ptr to | |
901 | * the attaching device, and given a callback for link status | |
902 | * change. The phy_device is returned to the attaching driver. | |
903 | * This function takes a reference on the phy device. | |
904 | */ | |
905 | int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, | |
906 | u32 flags, phy_interface_t interface) | |
907 | { | |
908 | struct module *ndev_owner = dev->dev.parent->driver->owner; | |
909 | struct mii_bus *bus = phydev->mdio.bus; | |
910 | struct device *d = &phydev->mdio.dev; | |
911 | int err; | |
912 | ||
913 | /* For Ethernet device drivers that register their own MDIO bus, we | |
914 | * will have bus->owner match ndev_mod, so we do not want to increment | |
915 | * our own module->refcnt here, otherwise we would not be able to | |
916 | * unload later on. | |
917 | */ | |
918 | if (ndev_owner != bus->owner && !try_module_get(bus->owner)) { | |
919 | dev_err(&dev->dev, "failed to get the bus module\n"); | |
920 | return -EIO; | |
921 | } | |
922 | ||
923 | if (!try_module_get(d->driver->owner)) { | |
924 | dev_err(&dev->dev, "failed to get the device driver module\n"); | |
925 | return -EIO; | |
926 | } | |
927 | ||
928 | get_device(d); | |
929 | ||
930 | /* Assume that if there is no driver, that it doesn't | |
931 | * exist, and we should use the genphy driver. | |
932 | */ | |
933 | if (!d->driver) { | |
934 | if (phydev->is_c45) | |
935 | d->driver = | |
936 | &genphy_driver[GENPHY_DRV_10G].mdiodrv.driver; | |
937 | else | |
938 | d->driver = | |
939 | &genphy_driver[GENPHY_DRV_1G].mdiodrv.driver; | |
940 | ||
941 | err = d->driver->probe(d); | |
942 | if (err >= 0) | |
943 | err = device_bind_driver(d); | |
944 | ||
945 | if (err) | |
946 | goto error; | |
947 | } | |
948 | ||
949 | if (phydev->attached_dev) { | |
950 | dev_err(&dev->dev, "PHY already attached\n"); | |
951 | err = -EBUSY; | |
952 | goto error; | |
953 | } | |
954 | ||
955 | phydev->attached_dev = dev; | |
956 | dev->phydev = phydev; | |
957 | ||
958 | phydev->dev_flags = flags; | |
959 | ||
960 | phydev->interface = interface; | |
961 | ||
962 | phydev->state = PHY_READY; | |
963 | ||
964 | /* Initial carrier state is off as the phy is about to be | |
965 | * (re)initialized. | |
966 | */ | |
967 | netif_carrier_off(phydev->attached_dev); | |
968 | ||
969 | /* Do initial configuration here, now that | |
970 | * we have certain key parameters | |
971 | * (dev_flags and interface) | |
972 | */ | |
973 | err = phy_init_hw(phydev); | |
974 | if (err) | |
975 | goto error; | |
976 | ||
977 | phy_resume(phydev); | |
978 | phy_led_triggers_register(phydev); | |
979 | ||
980 | return err; | |
981 | ||
982 | error: | |
983 | phy_detach(phydev); | |
984 | put_device(d); | |
985 | module_put(d->driver->owner); | |
986 | if (ndev_owner != bus->owner) | |
987 | module_put(bus->owner); | |
988 | return err; | |
989 | } | |
990 | EXPORT_SYMBOL(phy_attach_direct); | |
991 | ||
992 | /** | |
993 | * phy_attach - attach a network device to a particular PHY device | |
994 | * @dev: network device to attach | |
995 | * @bus_id: Bus ID of PHY device to attach | |
996 | * @interface: PHY device's interface | |
997 | * | |
998 | * Description: Same as phy_attach_direct() except that a PHY bus_id | |
999 | * string is passed instead of a pointer to a struct phy_device. | |
1000 | */ | |
1001 | struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, | |
1002 | phy_interface_t interface) | |
1003 | { | |
1004 | struct bus_type *bus = &mdio_bus_type; | |
1005 | struct phy_device *phydev; | |
1006 | struct device *d; | |
1007 | int rc; | |
1008 | ||
1009 | /* Search the list of PHY devices on the mdio bus for the | |
1010 | * PHY with the requested name | |
1011 | */ | |
1012 | d = bus_find_device_by_name(bus, NULL, bus_id); | |
1013 | if (!d) { | |
1014 | pr_err("PHY %s not found\n", bus_id); | |
1015 | return ERR_PTR(-ENODEV); | |
1016 | } | |
1017 | phydev = to_phy_device(d); | |
1018 | ||
1019 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); | |
1020 | put_device(d); | |
1021 | if (rc) | |
1022 | return ERR_PTR(rc); | |
1023 | ||
1024 | return phydev; | |
1025 | } | |
1026 | EXPORT_SYMBOL(phy_attach); | |
1027 | ||
1028 | /** | |
1029 | * phy_detach - detach a PHY device from its network device | |
1030 | * @phydev: target phy_device struct | |
1031 | * | |
1032 | * This detaches the phy device from its network device and the phy | |
1033 | * driver, and drops the reference count taken in phy_attach_direct(). | |
1034 | */ | |
1035 | void phy_detach(struct phy_device *phydev) | |
1036 | { | |
1037 | struct net_device *dev = phydev->attached_dev; | |
1038 | struct module *ndev_owner = dev->dev.parent->driver->owner; | |
1039 | struct mii_bus *bus; | |
1040 | int i; | |
1041 | ||
1042 | phydev->attached_dev->phydev = NULL; | |
1043 | phydev->attached_dev = NULL; | |
1044 | phy_suspend(phydev); | |
1045 | ||
1046 | phy_led_triggers_unregister(phydev); | |
1047 | ||
1048 | /* If the device had no specific driver before (i.e. - it | |
1049 | * was using the generic driver), we unbind the device | |
1050 | * from the generic driver so that there's a chance a | |
1051 | * real driver could be loaded | |
1052 | */ | |
1053 | for (i = 0; i < ARRAY_SIZE(genphy_driver); i++) { | |
1054 | if (phydev->mdio.dev.driver == | |
1055 | &genphy_driver[i].mdiodrv.driver) { | |
1056 | device_release_driver(&phydev->mdio.dev); | |
1057 | break; | |
1058 | } | |
1059 | } | |
1060 | ||
1061 | /* | |
1062 | * The phydev might go away on the put_device() below, so avoid | |
1063 | * a use-after-free bug by reading the underlying bus first. | |
1064 | */ | |
1065 | bus = phydev->mdio.bus; | |
1066 | ||
1067 | put_device(&phydev->mdio.dev); | |
1068 | module_put(phydev->mdio.dev.driver->owner); | |
1069 | if (ndev_owner != bus->owner) | |
1070 | module_put(bus->owner); | |
1071 | } | |
1072 | EXPORT_SYMBOL(phy_detach); | |
1073 | ||
1074 | int phy_suspend(struct phy_device *phydev) | |
1075 | { | |
1076 | struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); | |
1077 | struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; | |
1078 | int ret = 0; | |
1079 | ||
1080 | /* If the device has WOL enabled, we cannot suspend the PHY */ | |
1081 | phy_ethtool_get_wol(phydev, &wol); | |
1082 | if (wol.wolopts) | |
1083 | return -EBUSY; | |
1084 | ||
1085 | if (phydrv->suspend) | |
1086 | ret = phydrv->suspend(phydev); | |
1087 | ||
1088 | if (ret) | |
1089 | return ret; | |
1090 | ||
1091 | phydev->suspended = true; | |
1092 | ||
1093 | return ret; | |
1094 | } | |
1095 | EXPORT_SYMBOL(phy_suspend); | |
1096 | ||
1097 | int phy_resume(struct phy_device *phydev) | |
1098 | { | |
1099 | struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); | |
1100 | int ret = 0; | |
1101 | ||
1102 | if (phydrv->resume) | |
1103 | ret = phydrv->resume(phydev); | |
1104 | ||
1105 | if (ret) | |
1106 | return ret; | |
1107 | ||
1108 | phydev->suspended = false; | |
1109 | ||
1110 | return ret; | |
1111 | } | |
1112 | EXPORT_SYMBOL(phy_resume); | |
1113 | ||
1114 | /* Generic PHY support and helper functions */ | |
1115 | ||
1116 | /** | |
1117 | * genphy_config_advert - sanitize and advertise auto-negotiation parameters | |
1118 | * @phydev: target phy_device struct | |
1119 | * | |
1120 | * Description: Writes MII_ADVERTISE with the appropriate values, | |
1121 | * after sanitizing the values to make sure we only advertise | |
1122 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement | |
1123 | * hasn't changed, and > 0 if it has changed. | |
1124 | */ | |
1125 | static int genphy_config_advert(struct phy_device *phydev) | |
1126 | { | |
1127 | u32 advertise; | |
1128 | int oldadv, adv, bmsr; | |
1129 | int err, changed = 0; | |
1130 | ||
1131 | /* Only allow advertising what this PHY supports */ | |
1132 | phydev->advertising &= phydev->supported; | |
1133 | advertise = phydev->advertising; | |
1134 | ||
1135 | /* Setup standard advertisement */ | |
1136 | adv = phy_read(phydev, MII_ADVERTISE); | |
1137 | if (adv < 0) | |
1138 | return adv; | |
1139 | ||
1140 | oldadv = adv; | |
1141 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | | |
1142 | ADVERTISE_PAUSE_ASYM); | |
1143 | adv |= ethtool_adv_to_mii_adv_t(advertise); | |
1144 | ||
1145 | if (adv != oldadv) { | |
1146 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
1147 | ||
1148 | if (err < 0) | |
1149 | return err; | |
1150 | changed = 1; | |
1151 | } | |
1152 | ||
1153 | bmsr = phy_read(phydev, MII_BMSR); | |
1154 | if (bmsr < 0) | |
1155 | return bmsr; | |
1156 | ||
1157 | /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all | |
1158 | * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a | |
1159 | * logical 1. | |
1160 | */ | |
1161 | if (!(bmsr & BMSR_ESTATEN)) | |
1162 | return changed; | |
1163 | ||
1164 | /* Configure gigabit if it's supported */ | |
1165 | adv = phy_read(phydev, MII_CTRL1000); | |
1166 | if (adv < 0) | |
1167 | return adv; | |
1168 | ||
1169 | oldadv = adv; | |
1170 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); | |
1171 | ||
1172 | if (phydev->supported & (SUPPORTED_1000baseT_Half | | |
1173 | SUPPORTED_1000baseT_Full)) { | |
1174 | adv |= ethtool_adv_to_mii_ctrl1000_t(advertise); | |
1175 | } | |
1176 | ||
1177 | if (adv != oldadv) | |
1178 | changed = 1; | |
1179 | ||
1180 | err = phy_write(phydev, MII_CTRL1000, adv); | |
1181 | if (err < 0) | |
1182 | return err; | |
1183 | ||
1184 | return changed; | |
1185 | } | |
1186 | ||
1187 | /** | |
1188 | * genphy_config_eee_advert - disable unwanted eee mode advertisement | |
1189 | * @phydev: target phy_device struct | |
1190 | * | |
1191 | * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy | |
1192 | * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't | |
1193 | * changed, and 1 if it has changed. | |
1194 | */ | |
1195 | static int genphy_config_eee_advert(struct phy_device *phydev) | |
1196 | { | |
1197 | int broken = phydev->eee_broken_modes; | |
1198 | int old_adv, adv; | |
1199 | ||
1200 | /* Nothing to disable */ | |
1201 | if (!broken) | |
1202 | return 0; | |
1203 | ||
1204 | /* If the following call fails, we assume that EEE is not | |
1205 | * supported by the phy. If we read 0, EEE is not advertised | |
1206 | * In both case, we don't need to continue | |
1207 | */ | |
1208 | adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN); | |
1209 | if (adv <= 0) | |
1210 | return 0; | |
1211 | ||
1212 | old_adv = adv; | |
1213 | adv &= ~broken; | |
1214 | ||
1215 | /* Advertising remains unchanged with the broken mask */ | |
1216 | if (old_adv == adv) | |
1217 | return 0; | |
1218 | ||
1219 | phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, adv); | |
1220 | ||
1221 | return 1; | |
1222 | } | |
1223 | ||
1224 | /** | |
1225 | * genphy_setup_forced - configures/forces speed/duplex from @phydev | |
1226 | * @phydev: target phy_device struct | |
1227 | * | |
1228 | * Description: Configures MII_BMCR to force speed/duplex | |
1229 | * to the values in phydev. Assumes that the values are valid. | |
1230 | * Please see phy_sanitize_settings(). | |
1231 | */ | |
1232 | int genphy_setup_forced(struct phy_device *phydev) | |
1233 | { | |
1234 | int ctl = phy_read(phydev, MII_BMCR); | |
1235 | ||
1236 | ctl &= BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN; | |
1237 | phydev->pause = 0; | |
1238 | phydev->asym_pause = 0; | |
1239 | ||
1240 | if (SPEED_1000 == phydev->speed) | |
1241 | ctl |= BMCR_SPEED1000; | |
1242 | else if (SPEED_100 == phydev->speed) | |
1243 | ctl |= BMCR_SPEED100; | |
1244 | ||
1245 | if (DUPLEX_FULL == phydev->duplex) | |
1246 | ctl |= BMCR_FULLDPLX; | |
1247 | ||
1248 | return phy_write(phydev, MII_BMCR, ctl); | |
1249 | } | |
1250 | EXPORT_SYMBOL(genphy_setup_forced); | |
1251 | ||
1252 | /** | |
1253 | * genphy_restart_aneg - Enable and Restart Autonegotiation | |
1254 | * @phydev: target phy_device struct | |
1255 | */ | |
1256 | int genphy_restart_aneg(struct phy_device *phydev) | |
1257 | { | |
1258 | int ctl = phy_read(phydev, MII_BMCR); | |
1259 | ||
1260 | if (ctl < 0) | |
1261 | return ctl; | |
1262 | ||
1263 | ctl |= BMCR_ANENABLE | BMCR_ANRESTART; | |
1264 | ||
1265 | /* Don't isolate the PHY if we're negotiating */ | |
1266 | ctl &= ~BMCR_ISOLATE; | |
1267 | ||
1268 | return phy_write(phydev, MII_BMCR, ctl); | |
1269 | } | |
1270 | EXPORT_SYMBOL(genphy_restart_aneg); | |
1271 | ||
1272 | /** | |
1273 | * genphy_config_aneg - restart auto-negotiation or write BMCR | |
1274 | * @phydev: target phy_device struct | |
1275 | * | |
1276 | * Description: If auto-negotiation is enabled, we configure the | |
1277 | * advertising, and then restart auto-negotiation. If it is not | |
1278 | * enabled, then we write the BMCR. | |
1279 | */ | |
1280 | int genphy_config_aneg(struct phy_device *phydev) | |
1281 | { | |
1282 | int err, changed; | |
1283 | ||
1284 | changed = genphy_config_eee_advert(phydev); | |
1285 | ||
1286 | if (AUTONEG_ENABLE != phydev->autoneg) | |
1287 | return genphy_setup_forced(phydev); | |
1288 | ||
1289 | err = genphy_config_advert(phydev); | |
1290 | if (err < 0) /* error */ | |
1291 | return err; | |
1292 | ||
1293 | changed |= err; | |
1294 | ||
1295 | if (changed == 0) { | |
1296 | /* Advertisement hasn't changed, but maybe aneg was never on to | |
1297 | * begin with? Or maybe phy was isolated? | |
1298 | */ | |
1299 | int ctl = phy_read(phydev, MII_BMCR); | |
1300 | ||
1301 | if (ctl < 0) | |
1302 | return ctl; | |
1303 | ||
1304 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) | |
1305 | changed = 1; /* do restart aneg */ | |
1306 | } | |
1307 | ||
1308 | /* Only restart aneg if we are advertising something different | |
1309 | * than we were before. | |
1310 | */ | |
1311 | if (changed > 0) | |
1312 | return genphy_restart_aneg(phydev); | |
1313 | ||
1314 | return 0; | |
1315 | } | |
1316 | EXPORT_SYMBOL(genphy_config_aneg); | |
1317 | ||
1318 | /** | |
1319 | * genphy_aneg_done - return auto-negotiation status | |
1320 | * @phydev: target phy_device struct | |
1321 | * | |
1322 | * Description: Reads the status register and returns 0 either if | |
1323 | * auto-negotiation is incomplete, or if there was an error. | |
1324 | * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. | |
1325 | */ | |
1326 | int genphy_aneg_done(struct phy_device *phydev) | |
1327 | { | |
1328 | int retval = phy_read(phydev, MII_BMSR); | |
1329 | ||
1330 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); | |
1331 | } | |
1332 | EXPORT_SYMBOL(genphy_aneg_done); | |
1333 | ||
1334 | static int gen10g_config_aneg(struct phy_device *phydev) | |
1335 | { | |
1336 | return 0; | |
1337 | } | |
1338 | ||
1339 | /** | |
1340 | * genphy_update_link - update link status in @phydev | |
1341 | * @phydev: target phy_device struct | |
1342 | * | |
1343 | * Description: Update the value in phydev->link to reflect the | |
1344 | * current link value. In order to do this, we need to read | |
1345 | * the status register twice, keeping the second value. | |
1346 | */ | |
1347 | int genphy_update_link(struct phy_device *phydev) | |
1348 | { | |
1349 | int status; | |
1350 | ||
1351 | /* Do a fake read */ | |
1352 | status = phy_read(phydev, MII_BMSR); | |
1353 | if (status < 0) | |
1354 | return status; | |
1355 | ||
1356 | /* Read link and autonegotiation status */ | |
1357 | status = phy_read(phydev, MII_BMSR); | |
1358 | if (status < 0) | |
1359 | return status; | |
1360 | ||
1361 | if ((status & BMSR_LSTATUS) == 0) | |
1362 | phydev->link = 0; | |
1363 | else | |
1364 | phydev->link = 1; | |
1365 | ||
1366 | return 0; | |
1367 | } | |
1368 | EXPORT_SYMBOL(genphy_update_link); | |
1369 | ||
1370 | /** | |
1371 | * genphy_read_status - check the link status and update current link state | |
1372 | * @phydev: target phy_device struct | |
1373 | * | |
1374 | * Description: Check the link, then figure out the current state | |
1375 | * by comparing what we advertise with what the link partner | |
1376 | * advertises. Start by checking the gigabit possibilities, | |
1377 | * then move on to 10/100. | |
1378 | */ | |
1379 | int genphy_read_status(struct phy_device *phydev) | |
1380 | { | |
1381 | int adv; | |
1382 | int err; | |
1383 | int lpa; | |
1384 | int lpagb = 0; | |
1385 | int common_adv; | |
1386 | int common_adv_gb = 0; | |
1387 | ||
1388 | /* Update the link, but return if there was an error */ | |
1389 | err = genphy_update_link(phydev); | |
1390 | if (err) | |
1391 | return err; | |
1392 | ||
1393 | phydev->lp_advertising = 0; | |
1394 | ||
1395 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
1396 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
1397 | | SUPPORTED_1000baseT_Full)) { | |
1398 | lpagb = phy_read(phydev, MII_STAT1000); | |
1399 | if (lpagb < 0) | |
1400 | return lpagb; | |
1401 | ||
1402 | adv = phy_read(phydev, MII_CTRL1000); | |
1403 | if (adv < 0) | |
1404 | return adv; | |
1405 | ||
1406 | phydev->lp_advertising = | |
1407 | mii_stat1000_to_ethtool_lpa_t(lpagb); | |
1408 | common_adv_gb = lpagb & adv << 2; | |
1409 | } | |
1410 | ||
1411 | lpa = phy_read(phydev, MII_LPA); | |
1412 | if (lpa < 0) | |
1413 | return lpa; | |
1414 | ||
1415 | phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa); | |
1416 | ||
1417 | adv = phy_read(phydev, MII_ADVERTISE); | |
1418 | if (adv < 0) | |
1419 | return adv; | |
1420 | ||
1421 | common_adv = lpa & adv; | |
1422 | ||
1423 | phydev->speed = SPEED_10; | |
1424 | phydev->duplex = DUPLEX_HALF; | |
1425 | phydev->pause = 0; | |
1426 | phydev->asym_pause = 0; | |
1427 | ||
1428 | if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) { | |
1429 | phydev->speed = SPEED_1000; | |
1430 | ||
1431 | if (common_adv_gb & LPA_1000FULL) | |
1432 | phydev->duplex = DUPLEX_FULL; | |
1433 | } else if (common_adv & (LPA_100FULL | LPA_100HALF)) { | |
1434 | phydev->speed = SPEED_100; | |
1435 | ||
1436 | if (common_adv & LPA_100FULL) | |
1437 | phydev->duplex = DUPLEX_FULL; | |
1438 | } else | |
1439 | if (common_adv & LPA_10FULL) | |
1440 | phydev->duplex = DUPLEX_FULL; | |
1441 | ||
1442 | if (phydev->duplex == DUPLEX_FULL) { | |
1443 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; | |
1444 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
1445 | } | |
1446 | } else { | |
1447 | int bmcr = phy_read(phydev, MII_BMCR); | |
1448 | ||
1449 | if (bmcr < 0) | |
1450 | return bmcr; | |
1451 | ||
1452 | if (bmcr & BMCR_FULLDPLX) | |
1453 | phydev->duplex = DUPLEX_FULL; | |
1454 | else | |
1455 | phydev->duplex = DUPLEX_HALF; | |
1456 | ||
1457 | if (bmcr & BMCR_SPEED1000) | |
1458 | phydev->speed = SPEED_1000; | |
1459 | else if (bmcr & BMCR_SPEED100) | |
1460 | phydev->speed = SPEED_100; | |
1461 | else | |
1462 | phydev->speed = SPEED_10; | |
1463 | ||
1464 | phydev->pause = 0; | |
1465 | phydev->asym_pause = 0; | |
1466 | } | |
1467 | ||
1468 | return 0; | |
1469 | } | |
1470 | EXPORT_SYMBOL(genphy_read_status); | |
1471 | ||
1472 | static int gen10g_read_status(struct phy_device *phydev) | |
1473 | { | |
1474 | int devad, reg; | |
1475 | u32 mmd_mask = phydev->c45_ids.devices_in_package; | |
1476 | ||
1477 | phydev->link = 1; | |
1478 | ||
1479 | /* For now just lie and say it's 10G all the time */ | |
1480 | phydev->speed = SPEED_10000; | |
1481 | phydev->duplex = DUPLEX_FULL; | |
1482 | ||
1483 | for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) { | |
1484 | if (!(mmd_mask & 1)) | |
1485 | continue; | |
1486 | ||
1487 | /* Read twice because link state is latched and a | |
1488 | * read moves the current state into the register | |
1489 | */ | |
1490 | phy_read_mmd(phydev, devad, MDIO_STAT1); | |
1491 | reg = phy_read_mmd(phydev, devad, MDIO_STAT1); | |
1492 | if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS)) | |
1493 | phydev->link = 0; | |
1494 | } | |
1495 | ||
1496 | return 0; | |
1497 | } | |
1498 | ||
1499 | /** | |
1500 | * genphy_soft_reset - software reset the PHY via BMCR_RESET bit | |
1501 | * @phydev: target phy_device struct | |
1502 | * | |
1503 | * Description: Perform a software PHY reset using the standard | |
1504 | * BMCR_RESET bit and poll for the reset bit to be cleared. | |
1505 | * | |
1506 | * Returns: 0 on success, < 0 on failure | |
1507 | */ | |
1508 | int genphy_soft_reset(struct phy_device *phydev) | |
1509 | { | |
1510 | int ret; | |
1511 | ||
1512 | ret = phy_write(phydev, MII_BMCR, BMCR_RESET); | |
1513 | if (ret < 0) | |
1514 | return ret; | |
1515 | ||
1516 | return phy_poll_reset(phydev); | |
1517 | } | |
1518 | EXPORT_SYMBOL(genphy_soft_reset); | |
1519 | ||
1520 | int genphy_config_init(struct phy_device *phydev) | |
1521 | { | |
1522 | int val; | |
1523 | u32 features; | |
1524 | ||
1525 | features = (SUPPORTED_TP | SUPPORTED_MII | |
1526 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
1527 | SUPPORTED_BNC | SUPPORTED_Pause | SUPPORTED_Asym_Pause); | |
1528 | ||
1529 | /* Do we support autonegotiation? */ | |
1530 | val = phy_read(phydev, MII_BMSR); | |
1531 | if (val < 0) | |
1532 | return val; | |
1533 | ||
1534 | if (val & BMSR_ANEGCAPABLE) | |
1535 | features |= SUPPORTED_Autoneg; | |
1536 | ||
1537 | if (val & BMSR_100FULL) | |
1538 | features |= SUPPORTED_100baseT_Full; | |
1539 | if (val & BMSR_100HALF) | |
1540 | features |= SUPPORTED_100baseT_Half; | |
1541 | if (val & BMSR_10FULL) | |
1542 | features |= SUPPORTED_10baseT_Full; | |
1543 | if (val & BMSR_10HALF) | |
1544 | features |= SUPPORTED_10baseT_Half; | |
1545 | ||
1546 | if (val & BMSR_ESTATEN) { | |
1547 | val = phy_read(phydev, MII_ESTATUS); | |
1548 | if (val < 0) | |
1549 | return val; | |
1550 | ||
1551 | if (val & ESTATUS_1000_TFULL) | |
1552 | features |= SUPPORTED_1000baseT_Full; | |
1553 | if (val & ESTATUS_1000_THALF) | |
1554 | features |= SUPPORTED_1000baseT_Half; | |
1555 | } | |
1556 | ||
1557 | phydev->supported &= features; | |
1558 | phydev->advertising &= features; | |
1559 | ||
1560 | return 0; | |
1561 | } | |
1562 | ||
1563 | static int gen10g_soft_reset(struct phy_device *phydev) | |
1564 | { | |
1565 | /* Do nothing for now */ | |
1566 | return 0; | |
1567 | } | |
1568 | EXPORT_SYMBOL(genphy_config_init); | |
1569 | ||
1570 | static int gen10g_config_init(struct phy_device *phydev) | |
1571 | { | |
1572 | /* Temporarily just say we support everything */ | |
1573 | phydev->supported = SUPPORTED_10000baseT_Full; | |
1574 | phydev->advertising = SUPPORTED_10000baseT_Full; | |
1575 | ||
1576 | return 0; | |
1577 | } | |
1578 | ||
1579 | int genphy_suspend(struct phy_device *phydev) | |
1580 | { | |
1581 | int value; | |
1582 | ||
1583 | mutex_lock(&phydev->lock); | |
1584 | ||
1585 | value = phy_read(phydev, MII_BMCR); | |
1586 | phy_write(phydev, MII_BMCR, value | BMCR_PDOWN); | |
1587 | ||
1588 | mutex_unlock(&phydev->lock); | |
1589 | ||
1590 | return 0; | |
1591 | } | |
1592 | EXPORT_SYMBOL(genphy_suspend); | |
1593 | ||
1594 | static int gen10g_suspend(struct phy_device *phydev) | |
1595 | { | |
1596 | return 0; | |
1597 | } | |
1598 | ||
1599 | int genphy_resume(struct phy_device *phydev) | |
1600 | { | |
1601 | int value; | |
1602 | ||
1603 | mutex_lock(&phydev->lock); | |
1604 | ||
1605 | value = phy_read(phydev, MII_BMCR); | |
1606 | phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN); | |
1607 | ||
1608 | mutex_unlock(&phydev->lock); | |
1609 | ||
1610 | return 0; | |
1611 | } | |
1612 | EXPORT_SYMBOL(genphy_resume); | |
1613 | ||
1614 | static int gen10g_resume(struct phy_device *phydev) | |
1615 | { | |
1616 | return 0; | |
1617 | } | |
1618 | ||
1619 | static int __set_phy_supported(struct phy_device *phydev, u32 max_speed) | |
1620 | { | |
1621 | /* The default values for phydev->supported are provided by the PHY | |
1622 | * driver "features" member, we want to reset to sane defaults first | |
1623 | * before supporting higher speeds. | |
1624 | */ | |
1625 | phydev->supported &= PHY_DEFAULT_FEATURES; | |
1626 | ||
1627 | switch (max_speed) { | |
1628 | default: | |
1629 | return -ENOTSUPP; | |
1630 | case SPEED_1000: | |
1631 | phydev->supported |= PHY_1000BT_FEATURES; | |
1632 | /* fall through */ | |
1633 | case SPEED_100: | |
1634 | phydev->supported |= PHY_100BT_FEATURES; | |
1635 | /* fall through */ | |
1636 | case SPEED_10: | |
1637 | phydev->supported |= PHY_10BT_FEATURES; | |
1638 | } | |
1639 | ||
1640 | return 0; | |
1641 | } | |
1642 | ||
1643 | int phy_set_max_speed(struct phy_device *phydev, u32 max_speed) | |
1644 | { | |
1645 | int err; | |
1646 | ||
1647 | err = __set_phy_supported(phydev, max_speed); | |
1648 | if (err) | |
1649 | return err; | |
1650 | ||
1651 | phydev->advertising = phydev->supported; | |
1652 | ||
1653 | return 0; | |
1654 | } | |
1655 | EXPORT_SYMBOL(phy_set_max_speed); | |
1656 | ||
1657 | static void of_set_phy_supported(struct phy_device *phydev) | |
1658 | { | |
1659 | struct device_node *node = phydev->mdio.dev.of_node; | |
1660 | u32 max_speed; | |
1661 | ||
1662 | if (!IS_ENABLED(CONFIG_OF_MDIO)) | |
1663 | return; | |
1664 | ||
1665 | if (!node) | |
1666 | return; | |
1667 | ||
1668 | if (!of_property_read_u32(node, "max-speed", &max_speed)) | |
1669 | __set_phy_supported(phydev, max_speed); | |
1670 | } | |
1671 | ||
1672 | static void of_set_phy_eee_broken(struct phy_device *phydev) | |
1673 | { | |
1674 | struct device_node *node = phydev->mdio.dev.of_node; | |
1675 | u32 broken = 0; | |
1676 | ||
1677 | if (!IS_ENABLED(CONFIG_OF_MDIO)) | |
1678 | return; | |
1679 | ||
1680 | if (!node) | |
1681 | return; | |
1682 | ||
1683 | if (of_property_read_bool(node, "eee-broken-100tx")) | |
1684 | broken |= MDIO_EEE_100TX; | |
1685 | if (of_property_read_bool(node, "eee-broken-1000t")) | |
1686 | broken |= MDIO_EEE_1000T; | |
1687 | if (of_property_read_bool(node, "eee-broken-10gt")) | |
1688 | broken |= MDIO_EEE_10GT; | |
1689 | if (of_property_read_bool(node, "eee-broken-1000kx")) | |
1690 | broken |= MDIO_EEE_1000KX; | |
1691 | if (of_property_read_bool(node, "eee-broken-10gkx4")) | |
1692 | broken |= MDIO_EEE_10GKX4; | |
1693 | if (of_property_read_bool(node, "eee-broken-10gkr")) | |
1694 | broken |= MDIO_EEE_10GKR; | |
1695 | ||
1696 | phydev->eee_broken_modes = broken; | |
1697 | } | |
1698 | ||
1699 | /** | |
1700 | * phy_probe - probe and init a PHY device | |
1701 | * @dev: device to probe and init | |
1702 | * | |
1703 | * Description: Take care of setting up the phy_device structure, | |
1704 | * set the state to READY (the driver's init function should | |
1705 | * set it to STARTING if needed). | |
1706 | */ | |
1707 | static int phy_probe(struct device *dev) | |
1708 | { | |
1709 | struct phy_device *phydev = to_phy_device(dev); | |
1710 | struct device_driver *drv = phydev->mdio.dev.driver; | |
1711 | struct phy_driver *phydrv = to_phy_driver(drv); | |
1712 | int err = 0; | |
1713 | ||
1714 | phydev->drv = phydrv; | |
1715 | ||
1716 | /* Disable the interrupt if the PHY doesn't support it | |
1717 | * but the interrupt is still a valid one | |
1718 | */ | |
1719 | if (!(phydrv->flags & PHY_HAS_INTERRUPT) && | |
1720 | phy_interrupt_is_valid(phydev)) | |
1721 | phydev->irq = PHY_POLL; | |
1722 | ||
1723 | if (phydrv->flags & PHY_IS_INTERNAL) | |
1724 | phydev->is_internal = true; | |
1725 | ||
1726 | mutex_lock(&phydev->lock); | |
1727 | ||
1728 | /* Start out supporting everything. Eventually, | |
1729 | * a controller will attach, and may modify one | |
1730 | * or both of these values | |
1731 | */ | |
1732 | phydev->supported = phydrv->features; | |
1733 | of_set_phy_supported(phydev); | |
1734 | phydev->advertising = phydev->supported; | |
1735 | ||
1736 | /* Get the EEE modes we want to prohibit. We will ask | |
1737 | * the PHY stop advertising these mode later on | |
1738 | */ | |
1739 | of_set_phy_eee_broken(phydev); | |
1740 | ||
1741 | /* The Pause Frame bits indicate that the PHY can support passing | |
1742 | * pause frames. During autonegotiation, the PHYs will determine if | |
1743 | * they should allow pause frames to pass. The MAC driver should then | |
1744 | * use that result to determine whether to enable flow control via | |
1745 | * pause frames. | |
1746 | * | |
1747 | * Normally, PHY drivers should not set the Pause bits, and instead | |
1748 | * allow phylib to do that. However, there may be some situations | |
1749 | * (e.g. hardware erratum) where the driver wants to set only one | |
1750 | * of these bits. | |
1751 | */ | |
1752 | if (phydrv->features & (SUPPORTED_Pause | SUPPORTED_Asym_Pause)) { | |
1753 | phydev->supported &= ~(SUPPORTED_Pause | SUPPORTED_Asym_Pause); | |
1754 | phydev->supported |= phydrv->features & | |
1755 | (SUPPORTED_Pause | SUPPORTED_Asym_Pause); | |
1756 | } else { | |
1757 | phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause; | |
1758 | } | |
1759 | ||
1760 | /* Set the state to READY by default */ | |
1761 | phydev->state = PHY_READY; | |
1762 | ||
1763 | if (phydev->drv->probe) | |
1764 | err = phydev->drv->probe(phydev); | |
1765 | ||
1766 | mutex_unlock(&phydev->lock); | |
1767 | ||
1768 | return err; | |
1769 | } | |
1770 | ||
1771 | static int phy_remove(struct device *dev) | |
1772 | { | |
1773 | struct phy_device *phydev = to_phy_device(dev); | |
1774 | ||
1775 | mutex_lock(&phydev->lock); | |
1776 | phydev->state = PHY_DOWN; | |
1777 | mutex_unlock(&phydev->lock); | |
1778 | ||
1779 | if (phydev->drv->remove) | |
1780 | phydev->drv->remove(phydev); | |
1781 | phydev->drv = NULL; | |
1782 | ||
1783 | return 0; | |
1784 | } | |
1785 | ||
1786 | /** | |
1787 | * phy_driver_register - register a phy_driver with the PHY layer | |
1788 | * @new_driver: new phy_driver to register | |
1789 | * @owner: module owning this PHY | |
1790 | */ | |
1791 | int phy_driver_register(struct phy_driver *new_driver, struct module *owner) | |
1792 | { | |
1793 | int retval; | |
1794 | ||
1795 | new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY; | |
1796 | new_driver->mdiodrv.driver.name = new_driver->name; | |
1797 | new_driver->mdiodrv.driver.bus = &mdio_bus_type; | |
1798 | new_driver->mdiodrv.driver.probe = phy_probe; | |
1799 | new_driver->mdiodrv.driver.remove = phy_remove; | |
1800 | new_driver->mdiodrv.driver.owner = owner; | |
1801 | ||
1802 | retval = driver_register(&new_driver->mdiodrv.driver); | |
1803 | if (retval) { | |
1804 | pr_err("%s: Error %d in registering driver\n", | |
1805 | new_driver->name, retval); | |
1806 | ||
1807 | return retval; | |
1808 | } | |
1809 | ||
1810 | pr_debug("%s: Registered new driver\n", new_driver->name); | |
1811 | ||
1812 | return 0; | |
1813 | } | |
1814 | EXPORT_SYMBOL(phy_driver_register); | |
1815 | ||
1816 | int phy_drivers_register(struct phy_driver *new_driver, int n, | |
1817 | struct module *owner) | |
1818 | { | |
1819 | int i, ret = 0; | |
1820 | ||
1821 | for (i = 0; i < n; i++) { | |
1822 | ret = phy_driver_register(new_driver + i, owner); | |
1823 | if (ret) { | |
1824 | while (i-- > 0) | |
1825 | phy_driver_unregister(new_driver + i); | |
1826 | break; | |
1827 | } | |
1828 | } | |
1829 | return ret; | |
1830 | } | |
1831 | EXPORT_SYMBOL(phy_drivers_register); | |
1832 | ||
1833 | void phy_driver_unregister(struct phy_driver *drv) | |
1834 | { | |
1835 | driver_unregister(&drv->mdiodrv.driver); | |
1836 | } | |
1837 | EXPORT_SYMBOL(phy_driver_unregister); | |
1838 | ||
1839 | void phy_drivers_unregister(struct phy_driver *drv, int n) | |
1840 | { | |
1841 | int i; | |
1842 | ||
1843 | for (i = 0; i < n; i++) | |
1844 | phy_driver_unregister(drv + i); | |
1845 | } | |
1846 | EXPORT_SYMBOL(phy_drivers_unregister); | |
1847 | ||
1848 | static struct phy_driver genphy_driver[] = { | |
1849 | { | |
1850 | .phy_id = 0xffffffff, | |
1851 | .phy_id_mask = 0xffffffff, | |
1852 | .name = "Generic PHY", | |
1853 | .soft_reset = genphy_soft_reset, | |
1854 | .config_init = genphy_config_init, | |
1855 | .features = PHY_GBIT_FEATURES | SUPPORTED_MII | | |
1856 | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
1857 | SUPPORTED_BNC, | |
1858 | .config_aneg = genphy_config_aneg, | |
1859 | .aneg_done = genphy_aneg_done, | |
1860 | .read_status = genphy_read_status, | |
1861 | .suspend = genphy_suspend, | |
1862 | .resume = genphy_resume, | |
1863 | }, { | |
1864 | .phy_id = 0xffffffff, | |
1865 | .phy_id_mask = 0xffffffff, | |
1866 | .name = "Generic 10G PHY", | |
1867 | .soft_reset = gen10g_soft_reset, | |
1868 | .config_init = gen10g_config_init, | |
1869 | .features = 0, | |
1870 | .config_aneg = gen10g_config_aneg, | |
1871 | .read_status = gen10g_read_status, | |
1872 | .suspend = gen10g_suspend, | |
1873 | .resume = gen10g_resume, | |
1874 | } }; | |
1875 | ||
1876 | static int __init phy_init(void) | |
1877 | { | |
1878 | int rc; | |
1879 | ||
1880 | rc = mdio_bus_init(); | |
1881 | if (rc) | |
1882 | return rc; | |
1883 | ||
1884 | rc = phy_drivers_register(genphy_driver, | |
1885 | ARRAY_SIZE(genphy_driver), THIS_MODULE); | |
1886 | if (rc) | |
1887 | mdio_bus_exit(); | |
1888 | ||
1889 | return rc; | |
1890 | } | |
1891 | ||
1892 | static void __exit phy_exit(void) | |
1893 | { | |
1894 | phy_drivers_unregister(genphy_driver, | |
1895 | ARRAY_SIZE(genphy_driver)); | |
1896 | mdio_bus_exit(); | |
1897 | } | |
1898 | ||
1899 | subsys_initcall(phy_init); | |
1900 | module_exit(phy_exit); |