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2f53e904 | 1 | /* Framework for finding and configuring PHYs. |
00db8189 AF |
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 | */ | |
8d242488 JP |
14 | |
15 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
16 | ||
00db8189 | 17 | #include <linux/kernel.h> |
00db8189 AF |
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> | |
00db8189 AF |
28 | #include <linux/mm.h> |
29 | #include <linux/module.h> | |
00db8189 AF |
30 | #include <linux/mii.h> |
31 | #include <linux/ethtool.h> | |
32 | #include <linux/phy.h> | |
2e0bc452 | 33 | #include <linux/phy_led_triggers.h> |
124059fd | 34 | #include <linux/mdio.h> |
2f53e904 SS |
35 | #include <linux/io.h> |
36 | #include <linux/uaccess.h> | |
de906af1 | 37 | #include <linux/of.h> |
00db8189 | 38 | |
00db8189 | 39 | #include <asm/irq.h> |
00db8189 | 40 | |
afcceaa3 OH |
41 | MODULE_DESCRIPTION("PHY library"); |
42 | MODULE_AUTHOR("Andy Fleming"); | |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
6f4a7f41 AV |
45 | void phy_device_free(struct phy_device *phydev) |
46 | { | |
e5a03bfd | 47 | put_device(&phydev->mdio.dev); |
6f4a7f41 | 48 | } |
4dea547f | 49 | EXPORT_SYMBOL(phy_device_free); |
6f4a7f41 | 50 | |
711fdba3 AL |
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 | ||
6f4a7f41 AV |
59 | static void phy_device_release(struct device *dev) |
60 | { | |
b2a43191 | 61 | kfree(to_phy_device(dev)); |
6f4a7f41 AV |
62 | } |
63 | ||
711fdba3 AL |
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 | ||
921690f2 RK |
72 | static struct phy_driver genphy_driver; |
73 | extern struct phy_driver genphy_10g_driver; | |
4dea547f | 74 | |
f62220d3 AF |
75 | static LIST_HEAD(phy_fixup_list); |
76 | static DEFINE_MUTEX(phy_fixup_lock); | |
77 | ||
bc87922f AL |
78 | #ifdef CONFIG_PM |
79 | static bool mdio_bus_phy_may_suspend(struct phy_device *phydev) | |
80 | { | |
81 | struct device_driver *drv = phydev->mdio.dev.driver; | |
82 | struct phy_driver *phydrv = to_phy_driver(drv); | |
83 | struct net_device *netdev = phydev->attached_dev; | |
84 | ||
85 | if (!drv || !phydrv->suspend) | |
86 | return false; | |
87 | ||
88 | /* PHY not attached? May suspend if the PHY has not already been | |
89 | * suspended as part of a prior call to phy_disconnect() -> | |
90 | * phy_detach() -> phy_suspend() because the parent netdev might be the | |
91 | * MDIO bus driver and clock gated at this point. | |
92 | */ | |
93 | if (!netdev) | |
94 | return !phydev->suspended; | |
95 | ||
96 | /* Don't suspend PHY if the attached netdev parent may wakeup. | |
97 | * The parent may point to a PCI device, as in tg3 driver. | |
98 | */ | |
99 | if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent)) | |
100 | return false; | |
101 | ||
102 | /* Also don't suspend PHY if the netdev itself may wakeup. This | |
103 | * is the case for devices w/o underlaying pwr. mgmt. aware bus, | |
104 | * e.g. SoC devices. | |
105 | */ | |
106 | if (device_may_wakeup(&netdev->dev)) | |
107 | return false; | |
108 | ||
109 | return true; | |
110 | } | |
111 | ||
112 | static int mdio_bus_phy_suspend(struct device *dev) | |
113 | { | |
114 | struct phy_device *phydev = to_phy_device(dev); | |
115 | ||
116 | /* We must stop the state machine manually, otherwise it stops out of | |
117 | * control, possibly with the phydev->lock held. Upon resume, netdev | |
118 | * may call phy routines that try to grab the same lock, and that may | |
119 | * lead to a deadlock. | |
120 | */ | |
121 | if (phydev->attached_dev && phydev->adjust_link) | |
122 | phy_stop_machine(phydev); | |
123 | ||
124 | if (!mdio_bus_phy_may_suspend(phydev)) | |
125 | return 0; | |
126 | ||
127 | return phy_suspend(phydev); | |
128 | } | |
129 | ||
130 | static int mdio_bus_phy_resume(struct device *dev) | |
131 | { | |
132 | struct phy_device *phydev = to_phy_device(dev); | |
133 | int ret; | |
134 | ||
135 | if (!mdio_bus_phy_may_suspend(phydev)) | |
136 | goto no_resume; | |
137 | ||
138 | ret = phy_resume(phydev); | |
139 | if (ret < 0) | |
140 | return ret; | |
141 | ||
142 | no_resume: | |
143 | if (phydev->attached_dev && phydev->adjust_link) | |
144 | phy_start_machine(phydev); | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
149 | static int mdio_bus_phy_restore(struct device *dev) | |
150 | { | |
151 | struct phy_device *phydev = to_phy_device(dev); | |
152 | struct net_device *netdev = phydev->attached_dev; | |
153 | int ret; | |
154 | ||
155 | if (!netdev) | |
156 | return 0; | |
157 | ||
158 | ret = phy_init_hw(phydev); | |
159 | if (ret < 0) | |
160 | return ret; | |
161 | ||
162 | /* The PHY needs to renegotiate. */ | |
163 | phydev->link = 0; | |
164 | phydev->state = PHY_UP; | |
165 | ||
166 | phy_start_machine(phydev); | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static const struct dev_pm_ops mdio_bus_phy_pm_ops = { | |
172 | .suspend = mdio_bus_phy_suspend, | |
173 | .resume = mdio_bus_phy_resume, | |
174 | .freeze = mdio_bus_phy_suspend, | |
175 | .thaw = mdio_bus_phy_resume, | |
176 | .restore = mdio_bus_phy_restore, | |
177 | }; | |
178 | ||
179 | #define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops) | |
180 | ||
181 | #else | |
182 | ||
183 | #define MDIO_BUS_PHY_PM_OPS NULL | |
184 | ||
185 | #endif /* CONFIG_PM */ | |
186 | ||
2f53e904 SS |
187 | /** |
188 | * phy_register_fixup - creates a new phy_fixup and adds it to the list | |
e5a03bfd | 189 | * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID) |
f62220d3 | 190 | * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) |
2f53e904 | 191 | * It can also be PHY_ANY_UID |
f62220d3 | 192 | * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before |
2f53e904 | 193 | * comparison |
f62220d3 AF |
194 | * @run: The actual code to be run when a matching PHY is found |
195 | */ | |
196 | int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, | |
2f53e904 | 197 | int (*run)(struct phy_device *)) |
f62220d3 | 198 | { |
553fe92b | 199 | struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); |
f62220d3 | 200 | |
f62220d3 AF |
201 | if (!fixup) |
202 | return -ENOMEM; | |
203 | ||
fb28ad35 | 204 | strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); |
f62220d3 AF |
205 | fixup->phy_uid = phy_uid; |
206 | fixup->phy_uid_mask = phy_uid_mask; | |
207 | fixup->run = run; | |
208 | ||
209 | mutex_lock(&phy_fixup_lock); | |
210 | list_add_tail(&fixup->list, &phy_fixup_list); | |
211 | mutex_unlock(&phy_fixup_lock); | |
212 | ||
213 | return 0; | |
214 | } | |
215 | EXPORT_SYMBOL(phy_register_fixup); | |
216 | ||
217 | /* Registers a fixup to be run on any PHY with the UID in phy_uid */ | |
218 | int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, | |
2f53e904 | 219 | int (*run)(struct phy_device *)) |
f62220d3 AF |
220 | { |
221 | return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); | |
222 | } | |
223 | EXPORT_SYMBOL(phy_register_fixup_for_uid); | |
224 | ||
225 | /* Registers a fixup to be run on the PHY with id string bus_id */ | |
226 | int phy_register_fixup_for_id(const char *bus_id, | |
2f53e904 | 227 | int (*run)(struct phy_device *)) |
f62220d3 AF |
228 | { |
229 | return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); | |
230 | } | |
231 | EXPORT_SYMBOL(phy_register_fixup_for_id); | |
232 | ||
f38e7a32 WH |
233 | /** |
234 | * phy_unregister_fixup - remove a phy_fixup from the list | |
235 | * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list | |
236 | * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list | |
237 | * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison | |
238 | */ | |
239 | int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask) | |
240 | { | |
241 | struct list_head *pos, *n; | |
242 | struct phy_fixup *fixup; | |
243 | int ret; | |
244 | ||
245 | ret = -ENODEV; | |
246 | ||
247 | mutex_lock(&phy_fixup_lock); | |
248 | list_for_each_safe(pos, n, &phy_fixup_list) { | |
249 | fixup = list_entry(pos, struct phy_fixup, list); | |
250 | ||
251 | if ((!strcmp(fixup->bus_id, bus_id)) && | |
252 | ((fixup->phy_uid & phy_uid_mask) == | |
253 | (phy_uid & phy_uid_mask))) { | |
254 | list_del(&fixup->list); | |
255 | kfree(fixup); | |
256 | ret = 0; | |
257 | break; | |
258 | } | |
259 | } | |
260 | mutex_unlock(&phy_fixup_lock); | |
261 | ||
262 | return ret; | |
263 | } | |
264 | EXPORT_SYMBOL(phy_unregister_fixup); | |
265 | ||
266 | /* Unregisters a fixup of any PHY with the UID in phy_uid */ | |
267 | int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask) | |
268 | { | |
269 | return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask); | |
270 | } | |
271 | EXPORT_SYMBOL(phy_unregister_fixup_for_uid); | |
272 | ||
273 | /* Unregisters a fixup of the PHY with id string bus_id */ | |
274 | int phy_unregister_fixup_for_id(const char *bus_id) | |
275 | { | |
276 | return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff); | |
277 | } | |
278 | EXPORT_SYMBOL(phy_unregister_fixup_for_id); | |
279 | ||
2f53e904 | 280 | /* Returns 1 if fixup matches phydev in bus_id and phy_uid. |
f62220d3 AF |
281 | * Fixups can be set to match any in one or more fields. |
282 | */ | |
283 | static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) | |
284 | { | |
84eff6d1 | 285 | if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0) |
f62220d3 AF |
286 | if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) |
287 | return 0; | |
288 | ||
289 | if ((fixup->phy_uid & fixup->phy_uid_mask) != | |
2f53e904 | 290 | (phydev->phy_id & fixup->phy_uid_mask)) |
f62220d3 AF |
291 | if (fixup->phy_uid != PHY_ANY_UID) |
292 | return 0; | |
293 | ||
294 | return 1; | |
295 | } | |
296 | ||
297 | /* Runs any matching fixups for this phydev */ | |
fbfcec63 | 298 | static int phy_scan_fixups(struct phy_device *phydev) |
f62220d3 AF |
299 | { |
300 | struct phy_fixup *fixup; | |
301 | ||
302 | mutex_lock(&phy_fixup_lock); | |
303 | list_for_each_entry(fixup, &phy_fixup_list, list) { | |
304 | if (phy_needs_fixup(phydev, fixup)) { | |
553fe92b | 305 | int err = fixup->run(phydev); |
f62220d3 | 306 | |
bc23283c JS |
307 | if (err < 0) { |
308 | mutex_unlock(&phy_fixup_lock); | |
f62220d3 | 309 | return err; |
bc23283c | 310 | } |
b0ae009f | 311 | phydev->has_fixups = true; |
f62220d3 AF |
312 | } |
313 | } | |
314 | mutex_unlock(&phy_fixup_lock); | |
315 | ||
316 | return 0; | |
317 | } | |
f62220d3 | 318 | |
e76a4957 AL |
319 | static int phy_bus_match(struct device *dev, struct device_driver *drv) |
320 | { | |
321 | struct phy_device *phydev = to_phy_device(dev); | |
322 | struct phy_driver *phydrv = to_phy_driver(drv); | |
323 | const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids); | |
324 | int i; | |
325 | ||
a9049e0c AL |
326 | if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY)) |
327 | return 0; | |
328 | ||
e76a4957 AL |
329 | if (phydrv->match_phy_device) |
330 | return phydrv->match_phy_device(phydev); | |
331 | ||
332 | if (phydev->is_c45) { | |
333 | for (i = 1; i < num_ids; i++) { | |
334 | if (!(phydev->c45_ids.devices_in_package & (1 << i))) | |
335 | continue; | |
336 | ||
337 | if ((phydrv->phy_id & phydrv->phy_id_mask) == | |
338 | (phydev->c45_ids.device_ids[i] & | |
339 | phydrv->phy_id_mask)) | |
340 | return 1; | |
341 | } | |
342 | return 0; | |
343 | } else { | |
344 | return (phydrv->phy_id & phydrv->phy_id_mask) == | |
345 | (phydev->phy_id & phydrv->phy_id_mask); | |
346 | } | |
347 | } | |
348 | ||
ac28b9f8 | 349 | struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id, |
2f53e904 SS |
350 | bool is_c45, |
351 | struct phy_c45_device_ids *c45_ids) | |
11b0bacd VB |
352 | { |
353 | struct phy_device *dev; | |
e5a03bfd | 354 | struct mdio_device *mdiodev; |
8626d3b4 | 355 | |
2f53e904 | 356 | /* We allocate the device, and initialize the default values */ |
cd861280 | 357 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
ef899c07 | 358 | if (!dev) |
d3765f08 | 359 | return ERR_PTR(-ENOMEM); |
11b0bacd | 360 | |
e5a03bfd AL |
361 | mdiodev = &dev->mdio; |
362 | mdiodev->dev.release = phy_device_release; | |
363 | mdiodev->dev.parent = &bus->dev; | |
364 | mdiodev->dev.bus = &mdio_bus_type; | |
365 | mdiodev->bus = bus; | |
bc87922f | 366 | mdiodev->pm_ops = MDIO_BUS_PHY_PM_OPS; |
e76a4957 | 367 | mdiodev->bus_match = phy_bus_match; |
e5a03bfd | 368 | mdiodev->addr = addr; |
7f854420 | 369 | mdiodev->flags = MDIO_DEVICE_FLAG_PHY; |
711fdba3 AL |
370 | mdiodev->device_free = phy_mdio_device_free; |
371 | mdiodev->device_remove = phy_mdio_device_remove; | |
6f4a7f41 | 372 | |
11b0bacd VB |
373 | dev->speed = 0; |
374 | dev->duplex = -1; | |
2f53e904 SS |
375 | dev->pause = 0; |
376 | dev->asym_pause = 0; | |
11b0bacd | 377 | dev->link = 1; |
e8a2b6a4 | 378 | dev->interface = PHY_INTERFACE_MODE_GMII; |
11b0bacd VB |
379 | |
380 | dev->autoneg = AUTONEG_ENABLE; | |
381 | ||
ac28b9f8 | 382 | dev->is_c45 = is_c45; |
11b0bacd | 383 | dev->phy_id = phy_id; |
ac28b9f8 DD |
384 | if (c45_ids) |
385 | dev->c45_ids = *c45_ids; | |
47b356e4 | 386 | dev->irq = bus->irq[addr]; |
e5a03bfd | 387 | dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr); |
11b0bacd VB |
388 | |
389 | dev->state = PHY_DOWN; | |
390 | ||
35b5f6b1 | 391 | mutex_init(&dev->lock); |
4f9c85a1 | 392 | INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); |
664fcf12 | 393 | INIT_WORK(&dev->phy_queue, phy_change_work); |
11b0bacd | 394 | |
8626d3b4 | 395 | /* Request the appropriate module unconditionally; don't |
2f53e904 SS |
396 | * bother trying to do so only if it isn't already loaded, |
397 | * because that gets complicated. A hotplug event would have | |
398 | * done an unconditional modprobe anyway. | |
399 | * We don't do normal hotplug because it won't work for MDIO | |
400 | * -- because it relies on the device staying around for long | |
401 | * enough for the driver to get loaded. With MDIO, the NIC | |
402 | * driver will get bored and give up as soon as it finds that | |
403 | * there's no driver _already_ loaded. | |
404 | */ | |
8626d3b4 DW |
405 | request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id)); |
406 | ||
e5a03bfd | 407 | device_initialize(&mdiodev->dev); |
b2a43191 | 408 | |
11b0bacd VB |
409 | return dev; |
410 | } | |
ac28b9f8 DD |
411 | EXPORT_SYMBOL(phy_device_create); |
412 | ||
5f6c99e0 SX |
413 | /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers. |
414 | * @bus: the target MII bus | |
415 | * @addr: PHY address on the MII bus | |
416 | * @dev_addr: MMD address in the PHY. | |
417 | * @devices_in_package: where to store the devices in package information. | |
418 | * | |
419 | * Description: reads devices in package registers of a MMD at @dev_addr | |
420 | * from PHY at @addr on @bus. | |
421 | * | |
422 | * Returns: 0 on success, -EIO on failure. | |
423 | */ | |
424 | static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr, | |
425 | u32 *devices_in_package) | |
426 | { | |
427 | int phy_reg, reg_addr; | |
428 | ||
429 | reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2; | |
430 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
431 | if (phy_reg < 0) | |
432 | return -EIO; | |
433 | *devices_in_package = (phy_reg & 0xffff) << 16; | |
434 | ||
435 | reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1; | |
436 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
437 | if (phy_reg < 0) | |
438 | return -EIO; | |
439 | *devices_in_package |= (phy_reg & 0xffff); | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
ac28b9f8 DD |
444 | /** |
445 | * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. | |
446 | * @bus: the target MII bus | |
447 | * @addr: PHY address on the MII bus | |
448 | * @phy_id: where to store the ID retrieved. | |
449 | * @c45_ids: where to store the c45 ID information. | |
450 | * | |
451 | * If the PHY devices-in-package appears to be valid, it and the | |
452 | * corresponding identifiers are stored in @c45_ids, zero is stored | |
453 | * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns | |
454 | * zero on success. | |
455 | * | |
456 | */ | |
457 | static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id, | |
458 | struct phy_c45_device_ids *c45_ids) { | |
459 | int phy_reg; | |
460 | int i, reg_addr; | |
461 | const int num_ids = ARRAY_SIZE(c45_ids->device_ids); | |
5f6c99e0 | 462 | u32 *devs = &c45_ids->devices_in_package; |
ac28b9f8 | 463 | |
5f6c99e0 SX |
464 | /* Find first non-zero Devices In package. Device zero is reserved |
465 | * for 802.3 c45 complied PHYs, so don't probe it at first. | |
ac28b9f8 | 466 | */ |
5f6c99e0 SX |
467 | for (i = 1; i < num_ids && *devs == 0; i++) { |
468 | phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs); | |
ac28b9f8 DD |
469 | if (phy_reg < 0) |
470 | return -EIO; | |
ac28b9f8 | 471 | |
5f6c99e0 SX |
472 | if ((*devs & 0x1fffffff) == 0x1fffffff) { |
473 | /* If mostly Fs, there is no device there, | |
474 | * then let's continue to probe more, as some | |
475 | * 10G PHYs have zero Devices In package, | |
476 | * e.g. Cortina CS4315/CS4340 PHY. | |
477 | */ | |
478 | phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs); | |
479 | if (phy_reg < 0) | |
480 | return -EIO; | |
481 | /* no device there, let's get out of here */ | |
482 | if ((*devs & 0x1fffffff) == 0x1fffffff) { | |
da1da284 SL |
483 | *phy_id = 0xffffffff; |
484 | return 0; | |
5f6c99e0 SX |
485 | } else { |
486 | break; | |
da1da284 | 487 | } |
ac28b9f8 DD |
488 | } |
489 | } | |
490 | ||
491 | /* Now probe Device Identifiers for each device present. */ | |
492 | for (i = 1; i < num_ids; i++) { | |
493 | if (!(c45_ids->devices_in_package & (1 << i))) | |
494 | continue; | |
495 | ||
496 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1; | |
497 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
498 | if (phy_reg < 0) | |
499 | return -EIO; | |
500 | c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16; | |
501 | ||
502 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2; | |
503 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
504 | if (phy_reg < 0) | |
505 | return -EIO; | |
506 | c45_ids->device_ids[i] |= (phy_reg & 0xffff); | |
507 | } | |
508 | *phy_id = 0; | |
509 | return 0; | |
510 | } | |
11b0bacd | 511 | |
b3df0da8 | 512 | /** |
cac1f3c8 | 513 | * get_phy_id - reads the specified addr for its ID. |
b3df0da8 RD |
514 | * @bus: the target MII bus |
515 | * @addr: PHY address on the MII bus | |
cac1f3c8 | 516 | * @phy_id: where to store the ID retrieved. |
ac28b9f8 DD |
517 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
518 | * @c45_ids: where to store the c45 ID information. | |
519 | * | |
520 | * Description: In the case of a 802.3-c22 PHY, reads the ID registers | |
521 | * of the PHY at @addr on the @bus, stores it in @phy_id and returns | |
522 | * zero on success. | |
523 | * | |
524 | * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and | |
525 | * its return value is in turn returned. | |
00db8189 | 526 | * |
00db8189 | 527 | */ |
ac28b9f8 DD |
528 | static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id, |
529 | bool is_c45, struct phy_c45_device_ids *c45_ids) | |
00db8189 AF |
530 | { |
531 | int phy_reg; | |
00db8189 | 532 | |
ac28b9f8 DD |
533 | if (is_c45) |
534 | return get_phy_c45_ids(bus, addr, phy_id, c45_ids); | |
535 | ||
2f53e904 | 536 | /* Grab the bits from PHYIR1, and put them in the upper half */ |
6fe32649 | 537 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); |
00db8189 | 538 | if (phy_reg < 0) |
cac1f3c8 | 539 | return -EIO; |
00db8189 | 540 | |
cac1f3c8 | 541 | *phy_id = (phy_reg & 0xffff) << 16; |
00db8189 AF |
542 | |
543 | /* Grab the bits from PHYIR2, and put them in the lower half */ | |
6fe32649 | 544 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); |
00db8189 | 545 | if (phy_reg < 0) |
cac1f3c8 PG |
546 | return -EIO; |
547 | ||
548 | *phy_id |= (phy_reg & 0xffff); | |
549 | ||
550 | return 0; | |
551 | } | |
552 | ||
553 | /** | |
2f53e904 SS |
554 | * get_phy_device - reads the specified PHY device and returns its @phy_device |
555 | * struct | |
cac1f3c8 PG |
556 | * @bus: the target MII bus |
557 | * @addr: PHY address on the MII bus | |
ac28b9f8 | 558 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
cac1f3c8 PG |
559 | * |
560 | * Description: Reads the ID registers of the PHY at @addr on the | |
561 | * @bus, then allocates and returns the phy_device to represent it. | |
562 | */ | |
ac28b9f8 | 563 | struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) |
cac1f3c8 | 564 | { |
ac28b9f8 | 565 | struct phy_c45_device_ids c45_ids = {0}; |
160c85f0 | 566 | u32 phy_id = 0; |
cac1f3c8 | 567 | int r; |
00db8189 | 568 | |
ac28b9f8 | 569 | r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids); |
cac1f3c8 PG |
570 | if (r) |
571 | return ERR_PTR(r); | |
00db8189 | 572 | |
6436cbcd GC |
573 | /* If the phy_id is mostly Fs, there is no device there */ |
574 | if ((phy_id & 0x1fffffff) == 0x1fffffff) | |
b74766a0 | 575 | return ERR_PTR(-ENODEV); |
6436cbcd | 576 | |
e62a768f | 577 | return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); |
00db8189 | 578 | } |
4dea547f GL |
579 | EXPORT_SYMBOL(get_phy_device); |
580 | ||
5cf11bee AL |
581 | static ssize_t |
582 | phy_id_show(struct device *dev, struct device_attribute *attr, char *buf) | |
583 | { | |
584 | struct phy_device *phydev = to_phy_device(dev); | |
585 | ||
586 | return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id); | |
587 | } | |
588 | static DEVICE_ATTR_RO(phy_id); | |
589 | ||
590 | static ssize_t | |
591 | phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf) | |
592 | { | |
593 | struct phy_device *phydev = to_phy_device(dev); | |
594 | const char *mode = NULL; | |
595 | ||
596 | if (phy_is_internal(phydev)) | |
597 | mode = "internal"; | |
598 | else | |
599 | mode = phy_modes(phydev->interface); | |
600 | ||
601 | return sprintf(buf, "%s\n", mode); | |
602 | } | |
603 | static DEVICE_ATTR_RO(phy_interface); | |
604 | ||
605 | static ssize_t | |
606 | phy_has_fixups_show(struct device *dev, struct device_attribute *attr, | |
607 | char *buf) | |
608 | { | |
609 | struct phy_device *phydev = to_phy_device(dev); | |
610 | ||
611 | return sprintf(buf, "%d\n", phydev->has_fixups); | |
612 | } | |
613 | static DEVICE_ATTR_RO(phy_has_fixups); | |
614 | ||
615 | static struct attribute *phy_dev_attrs[] = { | |
616 | &dev_attr_phy_id.attr, | |
617 | &dev_attr_phy_interface.attr, | |
618 | &dev_attr_phy_has_fixups.attr, | |
619 | NULL, | |
620 | }; | |
621 | ATTRIBUTE_GROUPS(phy_dev); | |
622 | ||
4dea547f GL |
623 | /** |
624 | * phy_device_register - Register the phy device on the MDIO bus | |
1d4ac5d5 | 625 | * @phydev: phy_device structure to be added to the MDIO bus |
4dea547f GL |
626 | */ |
627 | int phy_device_register(struct phy_device *phydev) | |
628 | { | |
629 | int err; | |
630 | ||
7f854420 AL |
631 | err = mdiobus_register_device(&phydev->mdio); |
632 | if (err) | |
633 | return err; | |
4dea547f GL |
634 | |
635 | /* Run all of the fixups for this PHY */ | |
d92f5dec | 636 | err = phy_scan_fixups(phydev); |
87aa9f9c | 637 | if (err) { |
e5a03bfd | 638 | pr_err("PHY %d failed to initialize\n", phydev->mdio.addr); |
87aa9f9c FF |
639 | goto out; |
640 | } | |
4dea547f | 641 | |
5cf11bee AL |
642 | phydev->mdio.dev.groups = phy_dev_groups; |
643 | ||
e5a03bfd | 644 | err = device_add(&phydev->mdio.dev); |
4dea547f | 645 | if (err) { |
e5a03bfd | 646 | pr_err("PHY %d failed to add\n", phydev->mdio.addr); |
4dea547f GL |
647 | goto out; |
648 | } | |
649 | ||
650 | return 0; | |
651 | ||
652 | out: | |
7f854420 | 653 | mdiobus_unregister_device(&phydev->mdio); |
4dea547f GL |
654 | return err; |
655 | } | |
656 | EXPORT_SYMBOL(phy_device_register); | |
00db8189 | 657 | |
38737e49 RK |
658 | /** |
659 | * phy_device_remove - Remove a previously registered phy device from the MDIO bus | |
660 | * @phydev: phy_device structure to remove | |
661 | * | |
662 | * This doesn't free the phy_device itself, it merely reverses the effects | |
663 | * of phy_device_register(). Use phy_device_free() to free the device | |
664 | * after calling this function. | |
665 | */ | |
666 | void phy_device_remove(struct phy_device *phydev) | |
667 | { | |
e5a03bfd | 668 | device_del(&phydev->mdio.dev); |
7f854420 | 669 | mdiobus_unregister_device(&phydev->mdio); |
38737e49 RK |
670 | } |
671 | EXPORT_SYMBOL(phy_device_remove); | |
672 | ||
f8f76db1 JP |
673 | /** |
674 | * phy_find_first - finds the first PHY device on the bus | |
675 | * @bus: the target MII bus | |
676 | */ | |
677 | struct phy_device *phy_find_first(struct mii_bus *bus) | |
678 | { | |
7f854420 | 679 | struct phy_device *phydev; |
f8f76db1 JP |
680 | int addr; |
681 | ||
682 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { | |
7f854420 AL |
683 | phydev = mdiobus_get_phy(bus, addr); |
684 | if (phydev) | |
685 | return phydev; | |
f8f76db1 JP |
686 | } |
687 | return NULL; | |
688 | } | |
689 | EXPORT_SYMBOL(phy_find_first); | |
690 | ||
b3df0da8 RD |
691 | /** |
692 | * phy_prepare_link - prepares the PHY layer to monitor link status | |
693 | * @phydev: target phy_device struct | |
694 | * @handler: callback function for link status change notifications | |
00db8189 | 695 | * |
b3df0da8 | 696 | * Description: Tells the PHY infrastructure to handle the |
00db8189 AF |
697 | * gory details on monitoring link status (whether through |
698 | * polling or an interrupt), and to call back to the | |
699 | * connected device driver when the link status changes. | |
700 | * If you want to monitor your own link state, don't call | |
b3df0da8 RD |
701 | * this function. |
702 | */ | |
89ff05ec | 703 | static void phy_prepare_link(struct phy_device *phydev, |
2f53e904 | 704 | void (*handler)(struct net_device *)) |
00db8189 AF |
705 | { |
706 | phydev->adjust_link = handler; | |
707 | } | |
708 | ||
fa94f6d9 GL |
709 | /** |
710 | * phy_connect_direct - connect an ethernet device to a specific phy_device | |
711 | * @dev: the network device to connect | |
712 | * @phydev: the pointer to the phy device | |
713 | * @handler: callback function for state change notifications | |
fa94f6d9 GL |
714 | * @interface: PHY device's interface |
715 | */ | |
716 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, | |
f9a8f83b | 717 | void (*handler)(struct net_device *), |
fa94f6d9 GL |
718 | phy_interface_t interface) |
719 | { | |
720 | int rc; | |
721 | ||
f9a8f83b | 722 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
fa94f6d9 GL |
723 | if (rc) |
724 | return rc; | |
725 | ||
726 | phy_prepare_link(phydev, handler); | |
29935aeb | 727 | phy_start_machine(phydev); |
fa94f6d9 GL |
728 | if (phydev->irq > 0) |
729 | phy_start_interrupts(phydev); | |
730 | ||
731 | return 0; | |
732 | } | |
733 | EXPORT_SYMBOL(phy_connect_direct); | |
734 | ||
b3df0da8 RD |
735 | /** |
736 | * phy_connect - connect an ethernet device to a PHY device | |
737 | * @dev: the network device to connect | |
5d12b132 | 738 | * @bus_id: the id string of the PHY device to connect |
b3df0da8 | 739 | * @handler: callback function for state change notifications |
b3df0da8 | 740 | * @interface: PHY device's interface |
e1393456 | 741 | * |
b3df0da8 | 742 | * Description: Convenience function for connecting ethernet |
e1393456 AF |
743 | * devices to PHY devices. The default behavior is for |
744 | * the PHY infrastructure to handle everything, and only notify | |
745 | * the connected driver when the link status changes. If you | |
746 | * don't want, or can't use the provided functionality, you may | |
747 | * choose to call only the subset of functions which provide | |
748 | * the desired functionality. | |
749 | */ | |
e109374f | 750 | struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, |
2f53e904 SS |
751 | void (*handler)(struct net_device *), |
752 | phy_interface_t interface) | |
e1393456 AF |
753 | { |
754 | struct phy_device *phydev; | |
fa94f6d9 GL |
755 | struct device *d; |
756 | int rc; | |
e1393456 | 757 | |
fa94f6d9 | 758 | /* Search the list of PHY devices on the mdio bus for the |
2f53e904 SS |
759 | * PHY with the requested name |
760 | */ | |
fa94f6d9 GL |
761 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); |
762 | if (!d) { | |
763 | pr_err("PHY %s not found\n", bus_id); | |
764 | return ERR_PTR(-ENODEV); | |
765 | } | |
766 | phydev = to_phy_device(d); | |
e1393456 | 767 | |
f9a8f83b | 768 | rc = phy_connect_direct(dev, phydev, handler, interface); |
17ae1c65 | 769 | put_device(d); |
fa94f6d9 GL |
770 | if (rc) |
771 | return ERR_PTR(rc); | |
e1393456 AF |
772 | |
773 | return phydev; | |
774 | } | |
775 | EXPORT_SYMBOL(phy_connect); | |
776 | ||
b3df0da8 | 777 | /** |
2f53e904 SS |
778 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY |
779 | * device | |
b3df0da8 RD |
780 | * @phydev: target phy_device struct |
781 | */ | |
e1393456 AF |
782 | void phy_disconnect(struct phy_device *phydev) |
783 | { | |
784 | if (phydev->irq > 0) | |
785 | phy_stop_interrupts(phydev); | |
786 | ||
787 | phy_stop_machine(phydev); | |
e109374f | 788 | |
e1393456 AF |
789 | phydev->adjust_link = NULL; |
790 | ||
791 | phy_detach(phydev); | |
792 | } | |
793 | EXPORT_SYMBOL(phy_disconnect); | |
794 | ||
87aa9f9c FF |
795 | /** |
796 | * phy_poll_reset - Safely wait until a PHY reset has properly completed | |
797 | * @phydev: The PHY device to poll | |
798 | * | |
799 | * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as | |
800 | * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR | |
801 | * register must be polled until the BMCR_RESET bit clears. | |
802 | * | |
803 | * Furthermore, any attempts to write to PHY registers may have no effect | |
804 | * or even generate MDIO bus errors until this is complete. | |
805 | * | |
806 | * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the | |
807 | * standard and do not fully reset after the BMCR_RESET bit is set, and may | |
808 | * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an | |
809 | * effort to support such broken PHYs, this function is separate from the | |
810 | * standard phy_init_hw() which will zero all the other bits in the BMCR | |
811 | * and reapply all driver-specific and board-specific fixups. | |
812 | */ | |
813 | static int phy_poll_reset(struct phy_device *phydev) | |
814 | { | |
815 | /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ | |
816 | unsigned int retries = 12; | |
817 | int ret; | |
818 | ||
819 | do { | |
820 | msleep(50); | |
821 | ret = phy_read(phydev, MII_BMCR); | |
822 | if (ret < 0) | |
823 | return ret; | |
824 | } while (ret & BMCR_RESET && --retries); | |
825 | if (ret & BMCR_RESET) | |
826 | return -ETIMEDOUT; | |
827 | ||
2f53e904 | 828 | /* Some chips (smsc911x) may still need up to another 1ms after the |
87aa9f9c FF |
829 | * BMCR_RESET bit is cleared before they are usable. |
830 | */ | |
831 | msleep(1); | |
832 | return 0; | |
833 | } | |
834 | ||
2f5cb434 AV |
835 | int phy_init_hw(struct phy_device *phydev) |
836 | { | |
9df81dd7 | 837 | int ret = 0; |
2f5cb434 AV |
838 | |
839 | if (!phydev->drv || !phydev->drv->config_init) | |
840 | return 0; | |
841 | ||
9df81dd7 FF |
842 | if (phydev->drv->soft_reset) |
843 | ret = phydev->drv->soft_reset(phydev); | |
844 | else | |
845 | ret = genphy_soft_reset(phydev); | |
846 | ||
87aa9f9c FF |
847 | if (ret < 0) |
848 | return ret; | |
849 | ||
2f5cb434 AV |
850 | ret = phy_scan_fixups(phydev); |
851 | if (ret < 0) | |
852 | return ret; | |
853 | ||
854 | return phydev->drv->config_init(phydev); | |
855 | } | |
87aa9f9c | 856 | EXPORT_SYMBOL(phy_init_hw); |
2f5cb434 | 857 | |
2220943a AL |
858 | void phy_attached_info(struct phy_device *phydev) |
859 | { | |
860 | phy_attached_print(phydev, NULL); | |
861 | } | |
862 | EXPORT_SYMBOL(phy_attached_info); | |
863 | ||
864 | #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)" | |
865 | void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) | |
866 | { | |
867 | if (!fmt) { | |
e5a03bfd | 868 | dev_info(&phydev->mdio.dev, ATTACHED_FMT "\n", |
2220943a AL |
869 | phydev->drv->name, phydev_name(phydev), |
870 | phydev->irq); | |
871 | } else { | |
872 | va_list ap; | |
873 | ||
e5a03bfd | 874 | dev_info(&phydev->mdio.dev, ATTACHED_FMT, |
2220943a AL |
875 | phydev->drv->name, phydev_name(phydev), |
876 | phydev->irq); | |
877 | ||
878 | va_start(ap, fmt); | |
879 | vprintk(fmt, ap); | |
880 | va_end(ap); | |
881 | } | |
882 | } | |
883 | EXPORT_SYMBOL(phy_attached_print); | |
884 | ||
b3df0da8 | 885 | /** |
fa94f6d9 | 886 | * phy_attach_direct - attach a network device to a given PHY device pointer |
b3df0da8 | 887 | * @dev: network device to attach |
fa94f6d9 | 888 | * @phydev: Pointer to phy_device to attach |
b3df0da8 RD |
889 | * @flags: PHY device's dev_flags |
890 | * @interface: PHY device's interface | |
e1393456 | 891 | * |
b3df0da8 | 892 | * Description: Called by drivers to attach to a particular PHY |
e1393456 | 893 | * device. The phy_device is found, and properly hooked up |
257184d7 AF |
894 | * to the phy_driver. If no driver is attached, then a |
895 | * generic driver is used. The phy_device is given a ptr to | |
e1393456 | 896 | * the attaching device, and given a callback for link status |
b3df0da8 | 897 | * change. The phy_device is returned to the attaching driver. |
7322967b | 898 | * This function takes a reference on the phy device. |
e1393456 | 899 | */ |
257184d7 AF |
900 | int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
901 | u32 flags, phy_interface_t interface) | |
e1393456 | 902 | { |
ec988ad7 | 903 | struct module *ndev_owner = dev->dev.parent->driver->owner; |
e5a03bfd AL |
904 | struct mii_bus *bus = phydev->mdio.bus; |
905 | struct device *d = &phydev->mdio.dev; | |
6d9f66ac | 906 | bool using_genphy = false; |
d005a09e | 907 | int err; |
e1393456 | 908 | |
ec988ad7 FF |
909 | /* For Ethernet device drivers that register their own MDIO bus, we |
910 | * will have bus->owner match ndev_mod, so we do not want to increment | |
911 | * our own module->refcnt here, otherwise we would not be able to | |
912 | * unload later on. | |
913 | */ | |
914 | if (ndev_owner != bus->owner && !try_module_get(bus->owner)) { | |
3e3aaf64 RK |
915 | dev_err(&dev->dev, "failed to get the bus module\n"); |
916 | return -EIO; | |
917 | } | |
918 | ||
7322967b RK |
919 | get_device(d); |
920 | ||
e1393456 | 921 | /* Assume that if there is no driver, that it doesn't |
2f53e904 SS |
922 | * exist, and we should use the genphy driver. |
923 | */ | |
ef899c07 | 924 | if (!d->driver) { |
257184d7 | 925 | if (phydev->is_c45) |
921690f2 | 926 | d->driver = &genphy_10g_driver.mdiodrv.driver; |
257184d7 | 927 | else |
921690f2 | 928 | d->driver = &genphy_driver.mdiodrv.driver; |
e1393456 | 929 | |
6d9f66ac FF |
930 | using_genphy = true; |
931 | } | |
932 | ||
933 | if (!try_module_get(d->driver->owner)) { | |
934 | dev_err(&dev->dev, "failed to get the device driver module\n"); | |
935 | err = -EIO; | |
936 | goto error_put_device; | |
937 | } | |
938 | ||
939 | if (using_genphy) { | |
e1393456 | 940 | err = d->driver->probe(d); |
b7a00ecd JG |
941 | if (err >= 0) |
942 | err = device_bind_driver(d); | |
e1393456 | 943 | |
b7a00ecd | 944 | if (err) |
6d9f66ac | 945 | goto error_module_put; |
e1393456 AF |
946 | } |
947 | ||
948 | if (phydev->attached_dev) { | |
fa94f6d9 | 949 | dev_err(&dev->dev, "PHY already attached\n"); |
3e3aaf64 RK |
950 | err = -EBUSY; |
951 | goto error; | |
b3565f27 EG |
952 | } |
953 | ||
e1393456 | 954 | phydev->attached_dev = dev; |
c1f19b51 | 955 | dev->phydev = phydev; |
a3995460 FF |
956 | |
957 | /* Some Ethernet drivers try to connect to a PHY device before | |
958 | * calling register_netdevice() -> netdev_register_kobject() and | |
959 | * does the dev->dev.kobj initialization. Here we only check for | |
960 | * success which indicates that the network device kobject is | |
961 | * ready. Once we do that we still need to keep track of whether | |
962 | * links were successfully set up or not for phy_detach() to | |
963 | * remove them accordingly. | |
964 | */ | |
965 | phydev->sysfs_links = false; | |
966 | ||
5568363f FF |
967 | err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj, |
968 | "attached_dev"); | |
a3995460 FF |
969 | if (!err) { |
970 | err = sysfs_create_link(&dev->dev.kobj, &phydev->mdio.dev.kobj, | |
971 | "phydev"); | |
972 | if (err) | |
973 | goto error; | |
5568363f | 974 | |
a3995460 FF |
975 | phydev->sysfs_links = true; |
976 | } | |
e1393456 AF |
977 | |
978 | phydev->dev_flags = flags; | |
979 | ||
e8a2b6a4 AF |
980 | phydev->interface = interface; |
981 | ||
ef24b16b AV |
982 | phydev->state = PHY_READY; |
983 | ||
113c74d8 SS |
984 | /* Initial carrier state is off as the phy is about to be |
985 | * (re)initialized. | |
986 | */ | |
987 | netif_carrier_off(phydev->attached_dev); | |
988 | ||
e8a2b6a4 AF |
989 | /* Do initial configuration here, now that |
990 | * we have certain key parameters | |
2f53e904 SS |
991 | * (dev_flags and interface) |
992 | */ | |
d005a09e MKB |
993 | err = phy_init_hw(phydev); |
994 | if (err) | |
a7dac9f9 | 995 | goto error; |
1211ce53 | 996 | |
a7dac9f9 | 997 | phy_resume(phydev); |
2e0bc452 ZB |
998 | phy_led_triggers_register(phydev); |
999 | ||
d005a09e | 1000 | return err; |
3e3aaf64 RK |
1001 | |
1002 | error: | |
6d9f66ac | 1003 | /* phy_detach() does all of the cleanup below */ |
a7dac9f9 | 1004 | phy_detach(phydev); |
6d9f66ac FF |
1005 | return err; |
1006 | ||
1007 | error_module_put: | |
cafe8df8 | 1008 | module_put(d->driver->owner); |
6d9f66ac FF |
1009 | error_put_device: |
1010 | put_device(d); | |
ec988ad7 FF |
1011 | if (ndev_owner != bus->owner) |
1012 | module_put(bus->owner); | |
3e3aaf64 | 1013 | return err; |
fa94f6d9 | 1014 | } |
257184d7 | 1015 | EXPORT_SYMBOL(phy_attach_direct); |
fa94f6d9 GL |
1016 | |
1017 | /** | |
1018 | * phy_attach - attach a network device to a particular PHY device | |
1019 | * @dev: network device to attach | |
1020 | * @bus_id: Bus ID of PHY device to attach | |
fa94f6d9 GL |
1021 | * @interface: PHY device's interface |
1022 | * | |
1023 | * Description: Same as phy_attach_direct() except that a PHY bus_id | |
1024 | * string is passed instead of a pointer to a struct phy_device. | |
1025 | */ | |
2f53e904 SS |
1026 | struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, |
1027 | phy_interface_t interface) | |
fa94f6d9 GL |
1028 | { |
1029 | struct bus_type *bus = &mdio_bus_type; | |
1030 | struct phy_device *phydev; | |
1031 | struct device *d; | |
1032 | int rc; | |
1033 | ||
1034 | /* Search the list of PHY devices on the mdio bus for the | |
2f53e904 SS |
1035 | * PHY with the requested name |
1036 | */ | |
fa94f6d9 GL |
1037 | d = bus_find_device_by_name(bus, NULL, bus_id); |
1038 | if (!d) { | |
1039 | pr_err("PHY %s not found\n", bus_id); | |
1040 | return ERR_PTR(-ENODEV); | |
e8a2b6a4 | 1041 | } |
fa94f6d9 GL |
1042 | phydev = to_phy_device(d); |
1043 | ||
f9a8f83b | 1044 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
17ae1c65 | 1045 | put_device(d); |
fa94f6d9 GL |
1046 | if (rc) |
1047 | return ERR_PTR(rc); | |
e8a2b6a4 | 1048 | |
e1393456 AF |
1049 | return phydev; |
1050 | } | |
1051 | EXPORT_SYMBOL(phy_attach); | |
1052 | ||
b3df0da8 RD |
1053 | /** |
1054 | * phy_detach - detach a PHY device from its network device | |
1055 | * @phydev: target phy_device struct | |
7322967b RK |
1056 | * |
1057 | * This detaches the phy device from its network device and the phy | |
1058 | * driver, and drops the reference count taken in phy_attach_direct(). | |
b3df0da8 | 1059 | */ |
e1393456 AF |
1060 | void phy_detach(struct phy_device *phydev) |
1061 | { | |
ec988ad7 FF |
1062 | struct net_device *dev = phydev->attached_dev; |
1063 | struct module *ndev_owner = dev->dev.parent->driver->owner; | |
3e3aaf64 | 1064 | struct mii_bus *bus; |
b3565f27 | 1065 | |
a3995460 FF |
1066 | if (phydev->sysfs_links) { |
1067 | sysfs_remove_link(&dev->dev.kobj, "phydev"); | |
1068 | sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev"); | |
1069 | } | |
c1f19b51 | 1070 | phydev->attached_dev->phydev = NULL; |
e1393456 | 1071 | phydev->attached_dev = NULL; |
1211ce53 | 1072 | phy_suspend(phydev); |
e1393456 | 1073 | |
0075bd69 GU |
1074 | phy_led_triggers_unregister(phydev); |
1075 | ||
6d9f66ac FF |
1076 | module_put(phydev->mdio.dev.driver->owner); |
1077 | ||
e1393456 AF |
1078 | /* If the device had no specific driver before (i.e. - it |
1079 | * was using the generic driver), we unbind the device | |
1080 | * from the generic driver so that there's a chance a | |
2f53e904 SS |
1081 | * real driver could be loaded |
1082 | */ | |
921690f2 RK |
1083 | if (phydev->mdio.dev.driver == &genphy_10g_driver.mdiodrv.driver || |
1084 | phydev->mdio.dev.driver == &genphy_driver.mdiodrv.driver) | |
1085 | device_release_driver(&phydev->mdio.dev); | |
3e3aaf64 | 1086 | |
7322967b RK |
1087 | /* |
1088 | * The phydev might go away on the put_device() below, so avoid | |
1089 | * a use-after-free bug by reading the underlying bus first. | |
1090 | */ | |
e5a03bfd | 1091 | bus = phydev->mdio.bus; |
3e3aaf64 | 1092 | |
e5a03bfd | 1093 | put_device(&phydev->mdio.dev); |
ec988ad7 FF |
1094 | if (ndev_owner != bus->owner) |
1095 | module_put(bus->owner); | |
e1393456 AF |
1096 | } |
1097 | EXPORT_SYMBOL(phy_detach); | |
1098 | ||
481b5d93 SH |
1099 | int phy_suspend(struct phy_device *phydev) |
1100 | { | |
e5a03bfd | 1101 | struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); |
32fc3fd4 | 1102 | struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; |
8a477a6f | 1103 | int ret = 0; |
481b5d93 SH |
1104 | |
1105 | /* If the device has WOL enabled, we cannot suspend the PHY */ | |
481b5d93 SH |
1106 | phy_ethtool_get_wol(phydev, &wol); |
1107 | if (wol.wolopts) | |
1108 | return -EBUSY; | |
1109 | ||
25149ef9 | 1110 | if (phydev->drv && phydrv->suspend) |
8a477a6f FF |
1111 | ret = phydrv->suspend(phydev); |
1112 | ||
1113 | if (ret) | |
1114 | return ret; | |
1115 | ||
1116 | phydev->suspended = true; | |
1117 | ||
1118 | return ret; | |
481b5d93 | 1119 | } |
ca127697 | 1120 | EXPORT_SYMBOL(phy_suspend); |
481b5d93 SH |
1121 | |
1122 | int phy_resume(struct phy_device *phydev) | |
1123 | { | |
e5a03bfd | 1124 | struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); |
8a477a6f | 1125 | int ret = 0; |
481b5d93 | 1126 | |
25149ef9 | 1127 | if (phydev->drv && phydrv->resume) |
8a477a6f FF |
1128 | ret = phydrv->resume(phydev); |
1129 | ||
1130 | if (ret) | |
1131 | return ret; | |
1132 | ||
1133 | phydev->suspended = false; | |
1134 | ||
1135 | return ret; | |
481b5d93 | 1136 | } |
ca127697 | 1137 | EXPORT_SYMBOL(phy_resume); |
e1393456 | 1138 | |
f0f9b4ed LYS |
1139 | int phy_loopback(struct phy_device *phydev, bool enable) |
1140 | { | |
1141 | struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); | |
1142 | int ret = 0; | |
1143 | ||
1144 | mutex_lock(&phydev->lock); | |
1145 | ||
1146 | if (enable && phydev->loopback_enabled) { | |
1147 | ret = -EBUSY; | |
1148 | goto out; | |
1149 | } | |
1150 | ||
1151 | if (!enable && !phydev->loopback_enabled) { | |
1152 | ret = -EINVAL; | |
1153 | goto out; | |
1154 | } | |
1155 | ||
1156 | if (phydev->drv && phydrv->set_loopback) | |
1157 | ret = phydrv->set_loopback(phydev, enable); | |
1158 | else | |
1159 | ret = -EOPNOTSUPP; | |
1160 | ||
1161 | if (ret) | |
1162 | goto out; | |
1163 | ||
1164 | phydev->loopback_enabled = enable; | |
1165 | ||
1166 | out: | |
1167 | mutex_unlock(&phydev->lock); | |
1168 | return ret; | |
1169 | } | |
1170 | EXPORT_SYMBOL(phy_loopback); | |
1171 | ||
00db8189 AF |
1172 | /* Generic PHY support and helper functions */ |
1173 | ||
b3df0da8 | 1174 | /** |
25985edc | 1175 | * genphy_config_advert - sanitize and advertise auto-negotiation parameters |
b3df0da8 | 1176 | * @phydev: target phy_device struct |
00db8189 | 1177 | * |
b3df0da8 | 1178 | * Description: Writes MII_ADVERTISE with the appropriate values, |
00db8189 | 1179 | * after sanitizing the values to make sure we only advertise |
51e2a384 TP |
1180 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
1181 | * hasn't changed, and > 0 if it has changed. | |
00db8189 | 1182 | */ |
89ff05ec | 1183 | static int genphy_config_advert(struct phy_device *phydev) |
00db8189 AF |
1184 | { |
1185 | u32 advertise; | |
5273e3a5 | 1186 | int oldadv, adv, bmsr; |
51e2a384 | 1187 | int err, changed = 0; |
00db8189 | 1188 | |
2f53e904 | 1189 | /* Only allow advertising what this PHY supports */ |
00db8189 AF |
1190 | phydev->advertising &= phydev->supported; |
1191 | advertise = phydev->advertising; | |
1192 | ||
1193 | /* Setup standard advertisement */ | |
2f53e904 | 1194 | adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
1195 | if (adv < 0) |
1196 | return adv; | |
1197 | ||
2f53e904 | 1198 | oldadv = adv; |
28011cf1 | 1199 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | |
00db8189 | 1200 | ADVERTISE_PAUSE_ASYM); |
37f07023 | 1201 | adv |= ethtool_adv_to_mii_adv_t(advertise); |
00db8189 | 1202 | |
51e2a384 TP |
1203 | if (adv != oldadv) { |
1204 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
00db8189 | 1205 | |
51e2a384 TP |
1206 | if (err < 0) |
1207 | return err; | |
1208 | changed = 1; | |
1209 | } | |
00db8189 | 1210 | |
5273e3a5 FF |
1211 | bmsr = phy_read(phydev, MII_BMSR); |
1212 | if (bmsr < 0) | |
1213 | return bmsr; | |
1214 | ||
1215 | /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all | |
1216 | * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a | |
1217 | * logical 1. | |
1218 | */ | |
1219 | if (!(bmsr & BMSR_ESTATEN)) | |
1220 | return changed; | |
1221 | ||
00db8189 | 1222 | /* Configure gigabit if it's supported */ |
5273e3a5 FF |
1223 | adv = phy_read(phydev, MII_CTRL1000); |
1224 | if (adv < 0) | |
1225 | return adv; | |
1226 | ||
1227 | oldadv = adv; | |
1228 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); | |
1229 | ||
00db8189 | 1230 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
2f53e904 | 1231 | SUPPORTED_1000baseT_Full)) { |
37f07023 | 1232 | adv |= ethtool_adv_to_mii_ctrl1000_t(advertise); |
00db8189 AF |
1233 | } |
1234 | ||
eb686231 M |
1235 | if (adv != oldadv) |
1236 | changed = 1; | |
1237 | ||
5273e3a5 FF |
1238 | err = phy_write(phydev, MII_CTRL1000, adv); |
1239 | if (err < 0) | |
1240 | return err; | |
1241 | ||
51e2a384 | 1242 | return changed; |
00db8189 | 1243 | } |
00db8189 | 1244 | |
d853d145 | 1245 | /** |
1246 | * genphy_config_eee_advert - disable unwanted eee mode advertisement | |
1247 | * @phydev: target phy_device struct | |
1248 | * | |
1249 | * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy | |
1250 | * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't | |
1251 | * changed, and 1 if it has changed. | |
1252 | */ | |
1253 | static int genphy_config_eee_advert(struct phy_device *phydev) | |
1254 | { | |
3bb9ab63 | 1255 | int broken = phydev->eee_broken_modes; |
1256 | int old_adv, adv; | |
d853d145 | 1257 | |
1258 | /* Nothing to disable */ | |
1259 | if (!broken) | |
1260 | return 0; | |
1261 | ||
1262 | /* If the following call fails, we assume that EEE is not | |
1263 | * supported by the phy. If we read 0, EEE is not advertised | |
1264 | * In both case, we don't need to continue | |
1265 | */ | |
a6d99fcd | 1266 | adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); |
d853d145 | 1267 | if (adv <= 0) |
1268 | return 0; | |
1269 | ||
1270 | old_adv = adv; | |
1271 | adv &= ~broken; | |
1272 | ||
1273 | /* Advertising remains unchanged with the broken mask */ | |
1274 | if (old_adv == adv) | |
1275 | return 0; | |
1276 | ||
a6d99fcd | 1277 | phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv); |
d853d145 | 1278 | |
1279 | return 1; | |
1280 | } | |
1281 | ||
b3df0da8 RD |
1282 | /** |
1283 | * genphy_setup_forced - configures/forces speed/duplex from @phydev | |
1284 | * @phydev: target phy_device struct | |
00db8189 | 1285 | * |
b3df0da8 | 1286 | * Description: Configures MII_BMCR to force speed/duplex |
00db8189 | 1287 | * to the values in phydev. Assumes that the values are valid. |
b3df0da8 RD |
1288 | * Please see phy_sanitize_settings(). |
1289 | */ | |
3fb69bca | 1290 | int genphy_setup_forced(struct phy_device *phydev) |
00db8189 | 1291 | { |
f48256ef | 1292 | int ctl = phy_read(phydev, MII_BMCR); |
00db8189 | 1293 | |
f48256ef | 1294 | ctl &= BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN; |
2f53e904 SS |
1295 | phydev->pause = 0; |
1296 | phydev->asym_pause = 0; | |
00db8189 AF |
1297 | |
1298 | if (SPEED_1000 == phydev->speed) | |
1299 | ctl |= BMCR_SPEED1000; | |
1300 | else if (SPEED_100 == phydev->speed) | |
1301 | ctl |= BMCR_SPEED100; | |
1302 | ||
1303 | if (DUPLEX_FULL == phydev->duplex) | |
1304 | ctl |= BMCR_FULLDPLX; | |
e109374f | 1305 | |
e62a768f | 1306 | return phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 1307 | } |
3fb69bca | 1308 | EXPORT_SYMBOL(genphy_setup_forced); |
00db8189 | 1309 | |
b3df0da8 RD |
1310 | /** |
1311 | * genphy_restart_aneg - Enable and Restart Autonegotiation | |
1312 | * @phydev: target phy_device struct | |
1313 | */ | |
00db8189 AF |
1314 | int genphy_restart_aneg(struct phy_device *phydev) |
1315 | { | |
553fe92b | 1316 | int ctl = phy_read(phydev, MII_BMCR); |
00db8189 AF |
1317 | |
1318 | if (ctl < 0) | |
1319 | return ctl; | |
1320 | ||
2f53e904 | 1321 | ctl |= BMCR_ANENABLE | BMCR_ANRESTART; |
00db8189 AF |
1322 | |
1323 | /* Don't isolate the PHY if we're negotiating */ | |
2f53e904 | 1324 | ctl &= ~BMCR_ISOLATE; |
00db8189 | 1325 | |
553fe92b | 1326 | return phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 1327 | } |
892871dc | 1328 | EXPORT_SYMBOL(genphy_restart_aneg); |
00db8189 | 1329 | |
b3df0da8 RD |
1330 | /** |
1331 | * genphy_config_aneg - restart auto-negotiation or write BMCR | |
1332 | * @phydev: target phy_device struct | |
00db8189 | 1333 | * |
b3df0da8 | 1334 | * Description: If auto-negotiation is enabled, we configure the |
00db8189 | 1335 | * advertising, and then restart auto-negotiation. If it is not |
b3df0da8 | 1336 | * enabled, then we write the BMCR. |
00db8189 AF |
1337 | */ |
1338 | int genphy_config_aneg(struct phy_device *phydev) | |
1339 | { | |
d853d145 | 1340 | int err, changed; |
1341 | ||
1342 | changed = genphy_config_eee_advert(phydev); | |
00db8189 | 1343 | |
de339c2a TP |
1344 | if (AUTONEG_ENABLE != phydev->autoneg) |
1345 | return genphy_setup_forced(phydev); | |
00db8189 | 1346 | |
d853d145 | 1347 | err = genphy_config_advert(phydev); |
1348 | if (err < 0) /* error */ | |
1349 | return err; | |
1350 | ||
1351 | changed |= err; | |
1352 | ||
1353 | if (changed == 0) { | |
25985edc | 1354 | /* Advertisement hasn't changed, but maybe aneg was never on to |
2f53e904 SS |
1355 | * begin with? Or maybe phy was isolated? |
1356 | */ | |
de339c2a TP |
1357 | int ctl = phy_read(phydev, MII_BMCR); |
1358 | ||
1359 | if (ctl < 0) | |
1360 | return ctl; | |
1361 | ||
1362 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) | |
d853d145 | 1363 | changed = 1; /* do restart aneg */ |
de339c2a TP |
1364 | } |
1365 | ||
1366 | /* Only restart aneg if we are advertising something different | |
2f53e904 SS |
1367 | * than we were before. |
1368 | */ | |
d853d145 | 1369 | if (changed > 0) |
1370 | return genphy_restart_aneg(phydev); | |
00db8189 | 1371 | |
d853d145 | 1372 | return 0; |
00db8189 AF |
1373 | } |
1374 | EXPORT_SYMBOL(genphy_config_aneg); | |
1375 | ||
a9fa6e6a FF |
1376 | /** |
1377 | * genphy_aneg_done - return auto-negotiation status | |
1378 | * @phydev: target phy_device struct | |
1379 | * | |
1380 | * Description: Reads the status register and returns 0 either if | |
1381 | * auto-negotiation is incomplete, or if there was an error. | |
1382 | * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. | |
1383 | */ | |
1384 | int genphy_aneg_done(struct phy_device *phydev) | |
1385 | { | |
1386 | int retval = phy_read(phydev, MII_BMSR); | |
1387 | ||
1388 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); | |
1389 | } | |
1390 | EXPORT_SYMBOL(genphy_aneg_done); | |
1391 | ||
b3df0da8 RD |
1392 | /** |
1393 | * genphy_update_link - update link status in @phydev | |
1394 | * @phydev: target phy_device struct | |
00db8189 | 1395 | * |
b3df0da8 | 1396 | * Description: Update the value in phydev->link to reflect the |
00db8189 | 1397 | * current link value. In order to do this, we need to read |
b3df0da8 | 1398 | * the status register twice, keeping the second value. |
00db8189 AF |
1399 | */ |
1400 | int genphy_update_link(struct phy_device *phydev) | |
1401 | { | |
1402 | int status; | |
1403 | ||
1404 | /* Do a fake read */ | |
1405 | status = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
1406 | if (status < 0) |
1407 | return status; | |
1408 | ||
1409 | /* Read link and autonegotiation status */ | |
1410 | status = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
1411 | if (status < 0) |
1412 | return status; | |
1413 | ||
1414 | if ((status & BMSR_LSTATUS) == 0) | |
1415 | phydev->link = 0; | |
1416 | else | |
1417 | phydev->link = 1; | |
1418 | ||
1419 | return 0; | |
1420 | } | |
6b655529 | 1421 | EXPORT_SYMBOL(genphy_update_link); |
00db8189 | 1422 | |
b3df0da8 RD |
1423 | /** |
1424 | * genphy_read_status - check the link status and update current link state | |
1425 | * @phydev: target phy_device struct | |
00db8189 | 1426 | * |
b3df0da8 | 1427 | * Description: Check the link, then figure out the current state |
00db8189 AF |
1428 | * by comparing what we advertise with what the link partner |
1429 | * advertises. Start by checking the gigabit possibilities, | |
1430 | * then move on to 10/100. | |
1431 | */ | |
1432 | int genphy_read_status(struct phy_device *phydev) | |
1433 | { | |
1434 | int adv; | |
1435 | int err; | |
1436 | int lpa; | |
1437 | int lpagb = 0; | |
a4572e0c CB |
1438 | int common_adv; |
1439 | int common_adv_gb = 0; | |
00db8189 | 1440 | |
2f53e904 | 1441 | /* Update the link, but return if there was an error */ |
00db8189 AF |
1442 | err = genphy_update_link(phydev); |
1443 | if (err) | |
1444 | return err; | |
1445 | ||
114002bc FF |
1446 | phydev->lp_advertising = 0; |
1447 | ||
00db8189 AF |
1448 | if (AUTONEG_ENABLE == phydev->autoneg) { |
1449 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
1450 | | SUPPORTED_1000baseT_Full)) { | |
1451 | lpagb = phy_read(phydev, MII_STAT1000); | |
00db8189 AF |
1452 | if (lpagb < 0) |
1453 | return lpagb; | |
1454 | ||
1455 | adv = phy_read(phydev, MII_CTRL1000); | |
00db8189 AF |
1456 | if (adv < 0) |
1457 | return adv; | |
1458 | ||
114002bc FF |
1459 | phydev->lp_advertising = |
1460 | mii_stat1000_to_ethtool_lpa_t(lpagb); | |
a4572e0c | 1461 | common_adv_gb = lpagb & adv << 2; |
00db8189 AF |
1462 | } |
1463 | ||
1464 | lpa = phy_read(phydev, MII_LPA); | |
00db8189 AF |
1465 | if (lpa < 0) |
1466 | return lpa; | |
1467 | ||
114002bc FF |
1468 | phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa); |
1469 | ||
00db8189 | 1470 | adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
1471 | if (adv < 0) |
1472 | return adv; | |
1473 | ||
a4572e0c | 1474 | common_adv = lpa & adv; |
00db8189 AF |
1475 | |
1476 | phydev->speed = SPEED_10; | |
1477 | phydev->duplex = DUPLEX_HALF; | |
2f53e904 SS |
1478 | phydev->pause = 0; |
1479 | phydev->asym_pause = 0; | |
00db8189 | 1480 | |
a4572e0c | 1481 | if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) { |
00db8189 AF |
1482 | phydev->speed = SPEED_1000; |
1483 | ||
a4572e0c | 1484 | if (common_adv_gb & LPA_1000FULL) |
00db8189 | 1485 | phydev->duplex = DUPLEX_FULL; |
a4572e0c | 1486 | } else if (common_adv & (LPA_100FULL | LPA_100HALF)) { |
00db8189 | 1487 | phydev->speed = SPEED_100; |
e109374f | 1488 | |
a4572e0c | 1489 | if (common_adv & LPA_100FULL) |
00db8189 AF |
1490 | phydev->duplex = DUPLEX_FULL; |
1491 | } else | |
a4572e0c | 1492 | if (common_adv & LPA_10FULL) |
00db8189 AF |
1493 | phydev->duplex = DUPLEX_FULL; |
1494 | ||
e109374f | 1495 | if (phydev->duplex == DUPLEX_FULL) { |
00db8189 AF |
1496 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; |
1497 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
1498 | } | |
1499 | } else { | |
1500 | int bmcr = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1501 | |
00db8189 AF |
1502 | if (bmcr < 0) |
1503 | return bmcr; | |
1504 | ||
1505 | if (bmcr & BMCR_FULLDPLX) | |
1506 | phydev->duplex = DUPLEX_FULL; | |
1507 | else | |
1508 | phydev->duplex = DUPLEX_HALF; | |
1509 | ||
1510 | if (bmcr & BMCR_SPEED1000) | |
1511 | phydev->speed = SPEED_1000; | |
1512 | else if (bmcr & BMCR_SPEED100) | |
1513 | phydev->speed = SPEED_100; | |
1514 | else | |
1515 | phydev->speed = SPEED_10; | |
1516 | ||
2f53e904 SS |
1517 | phydev->pause = 0; |
1518 | phydev->asym_pause = 0; | |
00db8189 AF |
1519 | } |
1520 | ||
1521 | return 0; | |
1522 | } | |
1523 | EXPORT_SYMBOL(genphy_read_status); | |
1524 | ||
797ac071 FF |
1525 | /** |
1526 | * genphy_soft_reset - software reset the PHY via BMCR_RESET bit | |
1527 | * @phydev: target phy_device struct | |
1528 | * | |
1529 | * Description: Perform a software PHY reset using the standard | |
1530 | * BMCR_RESET bit and poll for the reset bit to be cleared. | |
1531 | * | |
1532 | * Returns: 0 on success, < 0 on failure | |
1533 | */ | |
1534 | int genphy_soft_reset(struct phy_device *phydev) | |
1535 | { | |
1536 | int ret; | |
1537 | ||
1538 | ret = phy_write(phydev, MII_BMCR, BMCR_RESET); | |
1539 | if (ret < 0) | |
1540 | return ret; | |
1541 | ||
1542 | return phy_poll_reset(phydev); | |
1543 | } | |
1544 | EXPORT_SYMBOL(genphy_soft_reset); | |
1545 | ||
af6b6967 | 1546 | int genphy_config_init(struct phy_device *phydev) |
00db8189 | 1547 | { |
84c22d79 | 1548 | int val; |
00db8189 AF |
1549 | u32 features; |
1550 | ||
00db8189 AF |
1551 | features = (SUPPORTED_TP | SUPPORTED_MII |
1552 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
cd772de3 | 1553 | SUPPORTED_BNC | SUPPORTED_Pause | SUPPORTED_Asym_Pause); |
00db8189 AF |
1554 | |
1555 | /* Do we support autonegotiation? */ | |
1556 | val = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
1557 | if (val < 0) |
1558 | return val; | |
1559 | ||
1560 | if (val & BMSR_ANEGCAPABLE) | |
1561 | features |= SUPPORTED_Autoneg; | |
1562 | ||
1563 | if (val & BMSR_100FULL) | |
1564 | features |= SUPPORTED_100baseT_Full; | |
1565 | if (val & BMSR_100HALF) | |
1566 | features |= SUPPORTED_100baseT_Half; | |
1567 | if (val & BMSR_10FULL) | |
1568 | features |= SUPPORTED_10baseT_Full; | |
1569 | if (val & BMSR_10HALF) | |
1570 | features |= SUPPORTED_10baseT_Half; | |
1571 | ||
1572 | if (val & BMSR_ESTATEN) { | |
1573 | val = phy_read(phydev, MII_ESTATUS); | |
00db8189 AF |
1574 | if (val < 0) |
1575 | return val; | |
1576 | ||
1577 | if (val & ESTATUS_1000_TFULL) | |
1578 | features |= SUPPORTED_1000baseT_Full; | |
1579 | if (val & ESTATUS_1000_THALF) | |
1580 | features |= SUPPORTED_1000baseT_Half; | |
1581 | } | |
1582 | ||
c242a472 SH |
1583 | phydev->supported &= features; |
1584 | phydev->advertising &= features; | |
00db8189 AF |
1585 | |
1586 | return 0; | |
1587 | } | |
a0a32d3a | 1588 | EXPORT_SYMBOL(genphy_config_init); |
124059fd | 1589 | |
0f0ca340 GC |
1590 | int genphy_suspend(struct phy_device *phydev) |
1591 | { | |
1592 | int value; | |
1593 | ||
1594 | mutex_lock(&phydev->lock); | |
1595 | ||
1596 | value = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1597 | phy_write(phydev, MII_BMCR, value | BMCR_PDOWN); |
0f0ca340 GC |
1598 | |
1599 | mutex_unlock(&phydev->lock); | |
1600 | ||
1601 | return 0; | |
1602 | } | |
1603 | EXPORT_SYMBOL(genphy_suspend); | |
00db8189 | 1604 | |
0f0ca340 GC |
1605 | int genphy_resume(struct phy_device *phydev) |
1606 | { | |
1607 | int value; | |
1608 | ||
1609 | mutex_lock(&phydev->lock); | |
1610 | ||
1611 | value = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1612 | phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN); |
0f0ca340 GC |
1613 | |
1614 | mutex_unlock(&phydev->lock); | |
1615 | ||
1616 | return 0; | |
1617 | } | |
1618 | EXPORT_SYMBOL(genphy_resume); | |
00db8189 | 1619 | |
f0f9b4ed LYS |
1620 | int genphy_loopback(struct phy_device *phydev, bool enable) |
1621 | { | |
1622 | int value; | |
1623 | ||
1624 | value = phy_read(phydev, MII_BMCR); | |
1625 | if (value < 0) | |
1626 | return value; | |
1627 | ||
1628 | if (enable) | |
1629 | value |= BMCR_LOOPBACK; | |
1630 | else | |
1631 | value &= ~BMCR_LOOPBACK; | |
1632 | ||
1633 | return phy_write(phydev, MII_BMCR, value); | |
1634 | } | |
1635 | EXPORT_SYMBOL(genphy_loopback); | |
1636 | ||
f3a6bd39 SH |
1637 | static int __set_phy_supported(struct phy_device *phydev, u32 max_speed) |
1638 | { | |
1639 | /* The default values for phydev->supported are provided by the PHY | |
1640 | * driver "features" member, we want to reset to sane defaults first | |
1641 | * before supporting higher speeds. | |
1642 | */ | |
1643 | phydev->supported &= PHY_DEFAULT_FEATURES; | |
1644 | ||
1645 | switch (max_speed) { | |
1646 | default: | |
1647 | return -ENOTSUPP; | |
1648 | case SPEED_1000: | |
1649 | phydev->supported |= PHY_1000BT_FEATURES; | |
1650 | /* fall through */ | |
1651 | case SPEED_100: | |
1652 | phydev->supported |= PHY_100BT_FEATURES; | |
1653 | /* fall through */ | |
1654 | case SPEED_10: | |
1655 | phydev->supported |= PHY_10BT_FEATURES; | |
1656 | } | |
1657 | ||
1658 | return 0; | |
1659 | } | |
1660 | ||
1661 | int phy_set_max_speed(struct phy_device *phydev, u32 max_speed) | |
1662 | { | |
1663 | int err; | |
1664 | ||
1665 | err = __set_phy_supported(phydev, max_speed); | |
1666 | if (err) | |
1667 | return err; | |
1668 | ||
1669 | phydev->advertising = phydev->supported; | |
1670 | ||
1671 | return 0; | |
1672 | } | |
1673 | EXPORT_SYMBOL(phy_set_max_speed); | |
1674 | ||
de906af1 SH |
1675 | static void of_set_phy_supported(struct phy_device *phydev) |
1676 | { | |
e5a03bfd | 1677 | struct device_node *node = phydev->mdio.dev.of_node; |
de906af1 SH |
1678 | u32 max_speed; |
1679 | ||
1680 | if (!IS_ENABLED(CONFIG_OF_MDIO)) | |
1681 | return; | |
1682 | ||
1683 | if (!node) | |
1684 | return; | |
1685 | ||
f3a6bd39 SH |
1686 | if (!of_property_read_u32(node, "max-speed", &max_speed)) |
1687 | __set_phy_supported(phydev, max_speed); | |
de906af1 SH |
1688 | } |
1689 | ||
d853d145 | 1690 | static void of_set_phy_eee_broken(struct phy_device *phydev) |
1691 | { | |
1692 | struct device_node *node = phydev->mdio.dev.of_node; | |
57f39862 | 1693 | u32 broken = 0; |
d853d145 | 1694 | |
1695 | if (!IS_ENABLED(CONFIG_OF_MDIO)) | |
1696 | return; | |
1697 | ||
1698 | if (!node) | |
1699 | return; | |
1700 | ||
57f39862 | 1701 | if (of_property_read_bool(node, "eee-broken-100tx")) |
1702 | broken |= MDIO_EEE_100TX; | |
1703 | if (of_property_read_bool(node, "eee-broken-1000t")) | |
1704 | broken |= MDIO_EEE_1000T; | |
1705 | if (of_property_read_bool(node, "eee-broken-10gt")) | |
1706 | broken |= MDIO_EEE_10GT; | |
1707 | if (of_property_read_bool(node, "eee-broken-1000kx")) | |
1708 | broken |= MDIO_EEE_1000KX; | |
1709 | if (of_property_read_bool(node, "eee-broken-10gkx4")) | |
1710 | broken |= MDIO_EEE_10GKX4; | |
1711 | if (of_property_read_bool(node, "eee-broken-10gkr")) | |
1712 | broken |= MDIO_EEE_10GKR; | |
1713 | ||
1714 | phydev->eee_broken_modes = broken; | |
d853d145 | 1715 | } |
1716 | ||
b3df0da8 RD |
1717 | /** |
1718 | * phy_probe - probe and init a PHY device | |
1719 | * @dev: device to probe and init | |
00db8189 | 1720 | * |
b3df0da8 | 1721 | * Description: Take care of setting up the phy_device structure, |
00db8189 AF |
1722 | * set the state to READY (the driver's init function should |
1723 | * set it to STARTING if needed). | |
1724 | */ | |
1725 | static int phy_probe(struct device *dev) | |
1726 | { | |
553fe92b | 1727 | struct phy_device *phydev = to_phy_device(dev); |
e5a03bfd | 1728 | struct device_driver *drv = phydev->mdio.dev.driver; |
553fe92b | 1729 | struct phy_driver *phydrv = to_phy_driver(drv); |
00db8189 AF |
1730 | int err = 0; |
1731 | ||
00db8189 AF |
1732 | phydev->drv = phydrv; |
1733 | ||
2c7b4921 FF |
1734 | /* Disable the interrupt if the PHY doesn't support it |
1735 | * but the interrupt is still a valid one | |
1736 | */ | |
1737 | if (!(phydrv->flags & PHY_HAS_INTERRUPT) && | |
2f53e904 | 1738 | phy_interrupt_is_valid(phydev)) |
00db8189 AF |
1739 | phydev->irq = PHY_POLL; |
1740 | ||
4284b6a5 FF |
1741 | if (phydrv->flags & PHY_IS_INTERNAL) |
1742 | phydev->is_internal = true; | |
1743 | ||
35b5f6b1 | 1744 | mutex_lock(&phydev->lock); |
00db8189 AF |
1745 | |
1746 | /* Start out supporting everything. Eventually, | |
1747 | * a controller will attach, and may modify one | |
2f53e904 SS |
1748 | * or both of these values |
1749 | */ | |
00db8189 | 1750 | phydev->supported = phydrv->features; |
de906af1 SH |
1751 | of_set_phy_supported(phydev); |
1752 | phydev->advertising = phydev->supported; | |
00db8189 | 1753 | |
d853d145 | 1754 | /* Get the EEE modes we want to prohibit. We will ask |
1755 | * the PHY stop advertising these mode later on | |
1756 | */ | |
1757 | of_set_phy_eee_broken(phydev); | |
1758 | ||
529ed127 TT |
1759 | /* The Pause Frame bits indicate that the PHY can support passing |
1760 | * pause frames. During autonegotiation, the PHYs will determine if | |
1761 | * they should allow pause frames to pass. The MAC driver should then | |
1762 | * use that result to determine whether to enable flow control via | |
1763 | * pause frames. | |
1764 | * | |
1765 | * Normally, PHY drivers should not set the Pause bits, and instead | |
1766 | * allow phylib to do that. However, there may be some situations | |
1767 | * (e.g. hardware erratum) where the driver wants to set only one | |
1768 | * of these bits. | |
1769 | */ | |
1770 | if (phydrv->features & (SUPPORTED_Pause | SUPPORTED_Asym_Pause)) { | |
1771 | phydev->supported &= ~(SUPPORTED_Pause | SUPPORTED_Asym_Pause); | |
1772 | phydev->supported |= phydrv->features & | |
1773 | (SUPPORTED_Pause | SUPPORTED_Asym_Pause); | |
1774 | } else { | |
1775 | phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause; | |
1776 | } | |
1777 | ||
00db8189 AF |
1778 | /* Set the state to READY by default */ |
1779 | phydev->state = PHY_READY; | |
1780 | ||
1781 | if (phydev->drv->probe) | |
1782 | err = phydev->drv->probe(phydev); | |
1783 | ||
35b5f6b1 | 1784 | mutex_unlock(&phydev->lock); |
00db8189 | 1785 | |
00db8189 AF |
1786 | return err; |
1787 | } | |
1788 | ||
1789 | static int phy_remove(struct device *dev) | |
1790 | { | |
553fe92b | 1791 | struct phy_device *phydev = to_phy_device(dev); |
00db8189 | 1792 | |
7b9a88a3 FF |
1793 | cancel_delayed_work_sync(&phydev->state_queue); |
1794 | ||
35b5f6b1 | 1795 | mutex_lock(&phydev->lock); |
00db8189 | 1796 | phydev->state = PHY_DOWN; |
35b5f6b1 | 1797 | mutex_unlock(&phydev->lock); |
00db8189 | 1798 | |
25149ef9 | 1799 | if (phydev->drv && phydev->drv->remove) |
00db8189 | 1800 | phydev->drv->remove(phydev); |
00db8189 AF |
1801 | phydev->drv = NULL; |
1802 | ||
1803 | return 0; | |
1804 | } | |
1805 | ||
b3df0da8 RD |
1806 | /** |
1807 | * phy_driver_register - register a phy_driver with the PHY layer | |
1808 | * @new_driver: new phy_driver to register | |
be01da72 | 1809 | * @owner: module owning this PHY |
b3df0da8 | 1810 | */ |
be01da72 | 1811 | int phy_driver_register(struct phy_driver *new_driver, struct module *owner) |
00db8189 AF |
1812 | { |
1813 | int retval; | |
1814 | ||
a9049e0c AL |
1815 | new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY; |
1816 | new_driver->mdiodrv.driver.name = new_driver->name; | |
1817 | new_driver->mdiodrv.driver.bus = &mdio_bus_type; | |
1818 | new_driver->mdiodrv.driver.probe = phy_probe; | |
1819 | new_driver->mdiodrv.driver.remove = phy_remove; | |
1820 | new_driver->mdiodrv.driver.owner = owner; | |
00db8189 | 1821 | |
a9049e0c | 1822 | retval = driver_register(&new_driver->mdiodrv.driver); |
00db8189 | 1823 | if (retval) { |
8d242488 JP |
1824 | pr_err("%s: Error %d in registering driver\n", |
1825 | new_driver->name, retval); | |
00db8189 AF |
1826 | |
1827 | return retval; | |
1828 | } | |
1829 | ||
f2511f13 | 1830 | pr_debug("%s: Registered new driver\n", new_driver->name); |
00db8189 AF |
1831 | |
1832 | return 0; | |
1833 | } | |
1834 | EXPORT_SYMBOL(phy_driver_register); | |
1835 | ||
be01da72 AL |
1836 | int phy_drivers_register(struct phy_driver *new_driver, int n, |
1837 | struct module *owner) | |
d5bf9071 CH |
1838 | { |
1839 | int i, ret = 0; | |
1840 | ||
1841 | for (i = 0; i < n; i++) { | |
be01da72 | 1842 | ret = phy_driver_register(new_driver + i, owner); |
d5bf9071 CH |
1843 | if (ret) { |
1844 | while (i-- > 0) | |
1845 | phy_driver_unregister(new_driver + i); | |
1846 | break; | |
1847 | } | |
1848 | } | |
1849 | return ret; | |
1850 | } | |
1851 | EXPORT_SYMBOL(phy_drivers_register); | |
1852 | ||
00db8189 AF |
1853 | void phy_driver_unregister(struct phy_driver *drv) |
1854 | { | |
a9049e0c | 1855 | driver_unregister(&drv->mdiodrv.driver); |
00db8189 AF |
1856 | } |
1857 | EXPORT_SYMBOL(phy_driver_unregister); | |
1858 | ||
d5bf9071 CH |
1859 | void phy_drivers_unregister(struct phy_driver *drv, int n) |
1860 | { | |
1861 | int i; | |
2f53e904 SS |
1862 | |
1863 | for (i = 0; i < n; i++) | |
d5bf9071 | 1864 | phy_driver_unregister(drv + i); |
d5bf9071 CH |
1865 | } |
1866 | EXPORT_SYMBOL(phy_drivers_unregister); | |
1867 | ||
921690f2 | 1868 | static struct phy_driver genphy_driver = { |
e1393456 AF |
1869 | .phy_id = 0xffffffff, |
1870 | .phy_id_mask = 0xffffffff, | |
1871 | .name = "Generic PHY", | |
0878fff1 | 1872 | .soft_reset = genphy_no_soft_reset, |
e1393456 | 1873 | .config_init = genphy_config_init, |
c242a472 SH |
1874 | .features = PHY_GBIT_FEATURES | SUPPORTED_MII | |
1875 | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
1876 | SUPPORTED_BNC, | |
e1393456 | 1877 | .config_aneg = genphy_config_aneg, |
76a423a3 | 1878 | .aneg_done = genphy_aneg_done, |
e1393456 | 1879 | .read_status = genphy_read_status, |
0f0ca340 GC |
1880 | .suspend = genphy_suspend, |
1881 | .resume = genphy_resume, | |
f0f9b4ed | 1882 | .set_loopback = genphy_loopback, |
921690f2 | 1883 | }; |
00db8189 | 1884 | |
67c4f3fa | 1885 | static int __init phy_init(void) |
00db8189 | 1886 | { |
67c4f3fa | 1887 | int rc; |
67c4f3fa JG |
1888 | |
1889 | rc = mdio_bus_init(); | |
1890 | if (rc) | |
e1393456 | 1891 | return rc; |
00db8189 | 1892 | |
921690f2 | 1893 | rc = phy_driver_register(&genphy_10g_driver, THIS_MODULE); |
e1393456 | 1894 | if (rc) |
921690f2 RK |
1895 | goto err_10g; |
1896 | ||
1897 | rc = phy_driver_register(&genphy_driver, THIS_MODULE); | |
1898 | if (rc) { | |
1899 | phy_driver_unregister(&genphy_10g_driver); | |
1900 | err_10g: | |
e1393456 | 1901 | mdio_bus_exit(); |
921690f2 | 1902 | } |
67c4f3fa | 1903 | |
67c4f3fa | 1904 | return rc; |
00db8189 AF |
1905 | } |
1906 | ||
67c4f3fa | 1907 | static void __exit phy_exit(void) |
00db8189 | 1908 | { |
921690f2 RK |
1909 | phy_driver_unregister(&genphy_10g_driver); |
1910 | phy_driver_unregister(&genphy_driver); | |
e1393456 | 1911 | mdio_bus_exit(); |
00db8189 AF |
1912 | } |
1913 | ||
e1393456 | 1914 | subsys_initcall(phy_init); |
67c4f3fa | 1915 | module_exit(phy_exit); |