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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> | |
124059fd | 33 | #include <linux/mdio.h> |
2f53e904 SS |
34 | #include <linux/io.h> |
35 | #include <linux/uaccess.h> | |
de906af1 | 36 | #include <linux/of.h> |
00db8189 | 37 | |
00db8189 | 38 | #include <asm/irq.h> |
00db8189 | 39 | |
afcceaa3 OH |
40 | MODULE_DESCRIPTION("PHY library"); |
41 | MODULE_AUTHOR("Andy Fleming"); | |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
6f4a7f41 AV |
44 | void phy_device_free(struct phy_device *phydev) |
45 | { | |
e5a03bfd | 46 | put_device(&phydev->mdio.dev); |
6f4a7f41 | 47 | } |
4dea547f | 48 | EXPORT_SYMBOL(phy_device_free); |
6f4a7f41 | 49 | |
711fdba3 AL |
50 | static void phy_mdio_device_free(struct mdio_device *mdiodev) |
51 | { | |
52 | struct phy_device *phydev; | |
53 | ||
54 | phydev = container_of(mdiodev, struct phy_device, mdio); | |
55 | phy_device_free(phydev); | |
56 | } | |
57 | ||
6f4a7f41 AV |
58 | static void phy_device_release(struct device *dev) |
59 | { | |
b2a43191 | 60 | kfree(to_phy_device(dev)); |
6f4a7f41 AV |
61 | } |
62 | ||
711fdba3 AL |
63 | static void phy_mdio_device_remove(struct mdio_device *mdiodev) |
64 | { | |
65 | struct phy_device *phydev; | |
66 | ||
67 | phydev = container_of(mdiodev, struct phy_device, mdio); | |
68 | phy_device_remove(phydev); | |
69 | } | |
70 | ||
ab2145ed SX |
71 | enum genphy_driver { |
72 | GENPHY_DRV_1G, | |
124059fd | 73 | GENPHY_DRV_10G, |
ab2145ed SX |
74 | GENPHY_DRV_MAX |
75 | }; | |
76 | ||
77 | static struct phy_driver genphy_driver[GENPHY_DRV_MAX]; | |
4dea547f | 78 | |
f62220d3 AF |
79 | static LIST_HEAD(phy_fixup_list); |
80 | static DEFINE_MUTEX(phy_fixup_lock); | |
81 | ||
bc87922f AL |
82 | #ifdef CONFIG_PM |
83 | static bool mdio_bus_phy_may_suspend(struct phy_device *phydev) | |
84 | { | |
85 | struct device_driver *drv = phydev->mdio.dev.driver; | |
86 | struct phy_driver *phydrv = to_phy_driver(drv); | |
87 | struct net_device *netdev = phydev->attached_dev; | |
88 | ||
89 | if (!drv || !phydrv->suspend) | |
90 | return false; | |
91 | ||
92 | /* PHY not attached? May suspend if the PHY has not already been | |
93 | * suspended as part of a prior call to phy_disconnect() -> | |
94 | * phy_detach() -> phy_suspend() because the parent netdev might be the | |
95 | * MDIO bus driver and clock gated at this point. | |
96 | */ | |
97 | if (!netdev) | |
98 | return !phydev->suspended; | |
99 | ||
100 | /* Don't suspend PHY if the attached netdev parent may wakeup. | |
101 | * The parent may point to a PCI device, as in tg3 driver. | |
102 | */ | |
103 | if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent)) | |
104 | return false; | |
105 | ||
106 | /* Also don't suspend PHY if the netdev itself may wakeup. This | |
107 | * is the case for devices w/o underlaying pwr. mgmt. aware bus, | |
108 | * e.g. SoC devices. | |
109 | */ | |
110 | if (device_may_wakeup(&netdev->dev)) | |
111 | return false; | |
112 | ||
113 | return true; | |
114 | } | |
115 | ||
116 | static int mdio_bus_phy_suspend(struct device *dev) | |
117 | { | |
118 | struct phy_device *phydev = to_phy_device(dev); | |
119 | ||
120 | /* We must stop the state machine manually, otherwise it stops out of | |
121 | * control, possibly with the phydev->lock held. Upon resume, netdev | |
122 | * may call phy routines that try to grab the same lock, and that may | |
123 | * lead to a deadlock. | |
124 | */ | |
125 | if (phydev->attached_dev && phydev->adjust_link) | |
126 | phy_stop_machine(phydev); | |
127 | ||
128 | if (!mdio_bus_phy_may_suspend(phydev)) | |
129 | return 0; | |
130 | ||
131 | return phy_suspend(phydev); | |
132 | } | |
133 | ||
134 | static int mdio_bus_phy_resume(struct device *dev) | |
135 | { | |
136 | struct phy_device *phydev = to_phy_device(dev); | |
137 | int ret; | |
138 | ||
139 | if (!mdio_bus_phy_may_suspend(phydev)) | |
140 | goto no_resume; | |
141 | ||
142 | ret = phy_resume(phydev); | |
143 | if (ret < 0) | |
144 | return ret; | |
145 | ||
146 | no_resume: | |
147 | if (phydev->attached_dev && phydev->adjust_link) | |
148 | phy_start_machine(phydev); | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | static int mdio_bus_phy_restore(struct device *dev) | |
154 | { | |
155 | struct phy_device *phydev = to_phy_device(dev); | |
156 | struct net_device *netdev = phydev->attached_dev; | |
157 | int ret; | |
158 | ||
159 | if (!netdev) | |
160 | return 0; | |
161 | ||
162 | ret = phy_init_hw(phydev); | |
163 | if (ret < 0) | |
164 | return ret; | |
165 | ||
166 | /* The PHY needs to renegotiate. */ | |
167 | phydev->link = 0; | |
168 | phydev->state = PHY_UP; | |
169 | ||
170 | phy_start_machine(phydev); | |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
175 | static const struct dev_pm_ops mdio_bus_phy_pm_ops = { | |
176 | .suspend = mdio_bus_phy_suspend, | |
177 | .resume = mdio_bus_phy_resume, | |
178 | .freeze = mdio_bus_phy_suspend, | |
179 | .thaw = mdio_bus_phy_resume, | |
180 | .restore = mdio_bus_phy_restore, | |
181 | }; | |
182 | ||
183 | #define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops) | |
184 | ||
185 | #else | |
186 | ||
187 | #define MDIO_BUS_PHY_PM_OPS NULL | |
188 | ||
189 | #endif /* CONFIG_PM */ | |
190 | ||
2f53e904 SS |
191 | /** |
192 | * phy_register_fixup - creates a new phy_fixup and adds it to the list | |
e5a03bfd | 193 | * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID) |
f62220d3 | 194 | * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) |
2f53e904 | 195 | * It can also be PHY_ANY_UID |
f62220d3 | 196 | * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before |
2f53e904 | 197 | * comparison |
f62220d3 AF |
198 | * @run: The actual code to be run when a matching PHY is found |
199 | */ | |
200 | int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, | |
2f53e904 | 201 | int (*run)(struct phy_device *)) |
f62220d3 | 202 | { |
553fe92b | 203 | struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); |
f62220d3 | 204 | |
f62220d3 AF |
205 | if (!fixup) |
206 | return -ENOMEM; | |
207 | ||
fb28ad35 | 208 | strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); |
f62220d3 AF |
209 | fixup->phy_uid = phy_uid; |
210 | fixup->phy_uid_mask = phy_uid_mask; | |
211 | fixup->run = run; | |
212 | ||
213 | mutex_lock(&phy_fixup_lock); | |
214 | list_add_tail(&fixup->list, &phy_fixup_list); | |
215 | mutex_unlock(&phy_fixup_lock); | |
216 | ||
217 | return 0; | |
218 | } | |
219 | EXPORT_SYMBOL(phy_register_fixup); | |
220 | ||
221 | /* Registers a fixup to be run on any PHY with the UID in phy_uid */ | |
222 | int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, | |
2f53e904 | 223 | int (*run)(struct phy_device *)) |
f62220d3 AF |
224 | { |
225 | return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); | |
226 | } | |
227 | EXPORT_SYMBOL(phy_register_fixup_for_uid); | |
228 | ||
229 | /* Registers a fixup to be run on the PHY with id string bus_id */ | |
230 | int phy_register_fixup_for_id(const char *bus_id, | |
2f53e904 | 231 | int (*run)(struct phy_device *)) |
f62220d3 AF |
232 | { |
233 | return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); | |
234 | } | |
235 | EXPORT_SYMBOL(phy_register_fixup_for_id); | |
236 | ||
2f53e904 | 237 | /* Returns 1 if fixup matches phydev in bus_id and phy_uid. |
f62220d3 AF |
238 | * Fixups can be set to match any in one or more fields. |
239 | */ | |
240 | static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) | |
241 | { | |
84eff6d1 | 242 | if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0) |
f62220d3 AF |
243 | if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) |
244 | return 0; | |
245 | ||
246 | if ((fixup->phy_uid & fixup->phy_uid_mask) != | |
2f53e904 | 247 | (phydev->phy_id & fixup->phy_uid_mask)) |
f62220d3 AF |
248 | if (fixup->phy_uid != PHY_ANY_UID) |
249 | return 0; | |
250 | ||
251 | return 1; | |
252 | } | |
253 | ||
254 | /* Runs any matching fixups for this phydev */ | |
fbfcec63 | 255 | static int phy_scan_fixups(struct phy_device *phydev) |
f62220d3 AF |
256 | { |
257 | struct phy_fixup *fixup; | |
258 | ||
259 | mutex_lock(&phy_fixup_lock); | |
260 | list_for_each_entry(fixup, &phy_fixup_list, list) { | |
261 | if (phy_needs_fixup(phydev, fixup)) { | |
553fe92b | 262 | int err = fixup->run(phydev); |
f62220d3 | 263 | |
bc23283c JS |
264 | if (err < 0) { |
265 | mutex_unlock(&phy_fixup_lock); | |
f62220d3 | 266 | return err; |
bc23283c | 267 | } |
b0ae009f | 268 | phydev->has_fixups = true; |
f62220d3 AF |
269 | } |
270 | } | |
271 | mutex_unlock(&phy_fixup_lock); | |
272 | ||
273 | return 0; | |
274 | } | |
f62220d3 | 275 | |
e76a4957 AL |
276 | static int phy_bus_match(struct device *dev, struct device_driver *drv) |
277 | { | |
278 | struct phy_device *phydev = to_phy_device(dev); | |
279 | struct phy_driver *phydrv = to_phy_driver(drv); | |
280 | const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids); | |
281 | int i; | |
282 | ||
a9049e0c AL |
283 | if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY)) |
284 | return 0; | |
285 | ||
e76a4957 AL |
286 | if (phydrv->match_phy_device) |
287 | return phydrv->match_phy_device(phydev); | |
288 | ||
289 | if (phydev->is_c45) { | |
290 | for (i = 1; i < num_ids; i++) { | |
291 | if (!(phydev->c45_ids.devices_in_package & (1 << i))) | |
292 | continue; | |
293 | ||
294 | if ((phydrv->phy_id & phydrv->phy_id_mask) == | |
295 | (phydev->c45_ids.device_ids[i] & | |
296 | phydrv->phy_id_mask)) | |
297 | return 1; | |
298 | } | |
299 | return 0; | |
300 | } else { | |
301 | return (phydrv->phy_id & phydrv->phy_id_mask) == | |
302 | (phydev->phy_id & phydrv->phy_id_mask); | |
303 | } | |
304 | } | |
305 | ||
ac28b9f8 | 306 | struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id, |
2f53e904 SS |
307 | bool is_c45, |
308 | struct phy_c45_device_ids *c45_ids) | |
11b0bacd VB |
309 | { |
310 | struct phy_device *dev; | |
e5a03bfd | 311 | struct mdio_device *mdiodev; |
8626d3b4 | 312 | |
2f53e904 | 313 | /* We allocate the device, and initialize the default values */ |
cd861280 | 314 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
ef899c07 | 315 | if (!dev) |
d3765f08 | 316 | return ERR_PTR(-ENOMEM); |
11b0bacd | 317 | |
e5a03bfd AL |
318 | mdiodev = &dev->mdio; |
319 | mdiodev->dev.release = phy_device_release; | |
320 | mdiodev->dev.parent = &bus->dev; | |
321 | mdiodev->dev.bus = &mdio_bus_type; | |
322 | mdiodev->bus = bus; | |
bc87922f | 323 | mdiodev->pm_ops = MDIO_BUS_PHY_PM_OPS; |
e76a4957 | 324 | mdiodev->bus_match = phy_bus_match; |
e5a03bfd | 325 | mdiodev->addr = addr; |
7f854420 | 326 | mdiodev->flags = MDIO_DEVICE_FLAG_PHY; |
711fdba3 AL |
327 | mdiodev->device_free = phy_mdio_device_free; |
328 | mdiodev->device_remove = phy_mdio_device_remove; | |
6f4a7f41 | 329 | |
11b0bacd VB |
330 | dev->speed = 0; |
331 | dev->duplex = -1; | |
2f53e904 SS |
332 | dev->pause = 0; |
333 | dev->asym_pause = 0; | |
11b0bacd | 334 | dev->link = 1; |
e8a2b6a4 | 335 | dev->interface = PHY_INTERFACE_MODE_GMII; |
11b0bacd VB |
336 | |
337 | dev->autoneg = AUTONEG_ENABLE; | |
338 | ||
ac28b9f8 | 339 | dev->is_c45 = is_c45; |
11b0bacd | 340 | dev->phy_id = phy_id; |
ac28b9f8 DD |
341 | if (c45_ids) |
342 | dev->c45_ids = *c45_ids; | |
47b356e4 | 343 | dev->irq = bus->irq[addr]; |
e5a03bfd | 344 | dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr); |
11b0bacd VB |
345 | |
346 | dev->state = PHY_DOWN; | |
347 | ||
35b5f6b1 | 348 | mutex_init(&dev->lock); |
4f9c85a1 | 349 | INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); |
5ea94e76 | 350 | INIT_WORK(&dev->phy_queue, phy_change); |
11b0bacd | 351 | |
8626d3b4 | 352 | /* Request the appropriate module unconditionally; don't |
2f53e904 SS |
353 | * bother trying to do so only if it isn't already loaded, |
354 | * because that gets complicated. A hotplug event would have | |
355 | * done an unconditional modprobe anyway. | |
356 | * We don't do normal hotplug because it won't work for MDIO | |
357 | * -- because it relies on the device staying around for long | |
358 | * enough for the driver to get loaded. With MDIO, the NIC | |
359 | * driver will get bored and give up as soon as it finds that | |
360 | * there's no driver _already_ loaded. | |
361 | */ | |
8626d3b4 DW |
362 | request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id)); |
363 | ||
e5a03bfd | 364 | device_initialize(&mdiodev->dev); |
b2a43191 | 365 | |
11b0bacd VB |
366 | return dev; |
367 | } | |
ac28b9f8 DD |
368 | EXPORT_SYMBOL(phy_device_create); |
369 | ||
5f6c99e0 SX |
370 | /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers. |
371 | * @bus: the target MII bus | |
372 | * @addr: PHY address on the MII bus | |
373 | * @dev_addr: MMD address in the PHY. | |
374 | * @devices_in_package: where to store the devices in package information. | |
375 | * | |
376 | * Description: reads devices in package registers of a MMD at @dev_addr | |
377 | * from PHY at @addr on @bus. | |
378 | * | |
379 | * Returns: 0 on success, -EIO on failure. | |
380 | */ | |
381 | static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr, | |
382 | u32 *devices_in_package) | |
383 | { | |
384 | int phy_reg, reg_addr; | |
385 | ||
386 | reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2; | |
387 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
388 | if (phy_reg < 0) | |
389 | return -EIO; | |
390 | *devices_in_package = (phy_reg & 0xffff) << 16; | |
391 | ||
392 | reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1; | |
393 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
394 | if (phy_reg < 0) | |
395 | return -EIO; | |
396 | *devices_in_package |= (phy_reg & 0xffff); | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
ac28b9f8 DD |
401 | /** |
402 | * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. | |
403 | * @bus: the target MII bus | |
404 | * @addr: PHY address on the MII bus | |
405 | * @phy_id: where to store the ID retrieved. | |
406 | * @c45_ids: where to store the c45 ID information. | |
407 | * | |
408 | * If the PHY devices-in-package appears to be valid, it and the | |
409 | * corresponding identifiers are stored in @c45_ids, zero is stored | |
410 | * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns | |
411 | * zero on success. | |
412 | * | |
413 | */ | |
414 | static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id, | |
415 | struct phy_c45_device_ids *c45_ids) { | |
416 | int phy_reg; | |
417 | int i, reg_addr; | |
418 | const int num_ids = ARRAY_SIZE(c45_ids->device_ids); | |
5f6c99e0 | 419 | u32 *devs = &c45_ids->devices_in_package; |
ac28b9f8 | 420 | |
5f6c99e0 SX |
421 | /* Find first non-zero Devices In package. Device zero is reserved |
422 | * for 802.3 c45 complied PHYs, so don't probe it at first. | |
ac28b9f8 | 423 | */ |
5f6c99e0 SX |
424 | for (i = 1; i < num_ids && *devs == 0; i++) { |
425 | phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs); | |
ac28b9f8 DD |
426 | if (phy_reg < 0) |
427 | return -EIO; | |
ac28b9f8 | 428 | |
5f6c99e0 SX |
429 | if ((*devs & 0x1fffffff) == 0x1fffffff) { |
430 | /* If mostly Fs, there is no device there, | |
431 | * then let's continue to probe more, as some | |
432 | * 10G PHYs have zero Devices In package, | |
433 | * e.g. Cortina CS4315/CS4340 PHY. | |
434 | */ | |
435 | phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs); | |
436 | if (phy_reg < 0) | |
437 | return -EIO; | |
438 | /* no device there, let's get out of here */ | |
439 | if ((*devs & 0x1fffffff) == 0x1fffffff) { | |
da1da284 SL |
440 | *phy_id = 0xffffffff; |
441 | return 0; | |
5f6c99e0 SX |
442 | } else { |
443 | break; | |
da1da284 | 444 | } |
ac28b9f8 DD |
445 | } |
446 | } | |
447 | ||
448 | /* Now probe Device Identifiers for each device present. */ | |
449 | for (i = 1; i < num_ids; i++) { | |
450 | if (!(c45_ids->devices_in_package & (1 << i))) | |
451 | continue; | |
452 | ||
453 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1; | |
454 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
455 | if (phy_reg < 0) | |
456 | return -EIO; | |
457 | c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16; | |
458 | ||
459 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2; | |
460 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
461 | if (phy_reg < 0) | |
462 | return -EIO; | |
463 | c45_ids->device_ids[i] |= (phy_reg & 0xffff); | |
464 | } | |
465 | *phy_id = 0; | |
466 | return 0; | |
467 | } | |
11b0bacd | 468 | |
b3df0da8 | 469 | /** |
cac1f3c8 | 470 | * get_phy_id - reads the specified addr for its ID. |
b3df0da8 RD |
471 | * @bus: the target MII bus |
472 | * @addr: PHY address on the MII bus | |
cac1f3c8 | 473 | * @phy_id: where to store the ID retrieved. |
ac28b9f8 DD |
474 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
475 | * @c45_ids: where to store the c45 ID information. | |
476 | * | |
477 | * Description: In the case of a 802.3-c22 PHY, reads the ID registers | |
478 | * of the PHY at @addr on the @bus, stores it in @phy_id and returns | |
479 | * zero on success. | |
480 | * | |
481 | * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and | |
482 | * its return value is in turn returned. | |
00db8189 | 483 | * |
00db8189 | 484 | */ |
ac28b9f8 DD |
485 | static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id, |
486 | bool is_c45, struct phy_c45_device_ids *c45_ids) | |
00db8189 AF |
487 | { |
488 | int phy_reg; | |
00db8189 | 489 | |
ac28b9f8 DD |
490 | if (is_c45) |
491 | return get_phy_c45_ids(bus, addr, phy_id, c45_ids); | |
492 | ||
2f53e904 | 493 | /* Grab the bits from PHYIR1, and put them in the upper half */ |
6fe32649 | 494 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); |
00db8189 | 495 | if (phy_reg < 0) |
cac1f3c8 | 496 | return -EIO; |
00db8189 | 497 | |
cac1f3c8 | 498 | *phy_id = (phy_reg & 0xffff) << 16; |
00db8189 AF |
499 | |
500 | /* Grab the bits from PHYIR2, and put them in the lower half */ | |
6fe32649 | 501 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); |
00db8189 | 502 | if (phy_reg < 0) |
cac1f3c8 PG |
503 | return -EIO; |
504 | ||
505 | *phy_id |= (phy_reg & 0xffff); | |
506 | ||
507 | return 0; | |
508 | } | |
509 | ||
510 | /** | |
2f53e904 SS |
511 | * get_phy_device - reads the specified PHY device and returns its @phy_device |
512 | * struct | |
cac1f3c8 PG |
513 | * @bus: the target MII bus |
514 | * @addr: PHY address on the MII bus | |
ac28b9f8 | 515 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
cac1f3c8 PG |
516 | * |
517 | * Description: Reads the ID registers of the PHY at @addr on the | |
518 | * @bus, then allocates and returns the phy_device to represent it. | |
519 | */ | |
ac28b9f8 | 520 | struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) |
cac1f3c8 | 521 | { |
ac28b9f8 | 522 | struct phy_c45_device_ids c45_ids = {0}; |
160c85f0 | 523 | u32 phy_id = 0; |
cac1f3c8 | 524 | int r; |
00db8189 | 525 | |
ac28b9f8 | 526 | r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids); |
cac1f3c8 PG |
527 | if (r) |
528 | return ERR_PTR(r); | |
00db8189 | 529 | |
6436cbcd GC |
530 | /* If the phy_id is mostly Fs, there is no device there */ |
531 | if ((phy_id & 0x1fffffff) == 0x1fffffff) | |
b74766a0 | 532 | return ERR_PTR(-ENODEV); |
6436cbcd | 533 | |
e62a768f | 534 | return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); |
00db8189 | 535 | } |
4dea547f GL |
536 | EXPORT_SYMBOL(get_phy_device); |
537 | ||
5cf11bee AL |
538 | static ssize_t |
539 | phy_id_show(struct device *dev, struct device_attribute *attr, char *buf) | |
540 | { | |
541 | struct phy_device *phydev = to_phy_device(dev); | |
542 | ||
543 | return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id); | |
544 | } | |
545 | static DEVICE_ATTR_RO(phy_id); | |
546 | ||
547 | static ssize_t | |
548 | phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf) | |
549 | { | |
550 | struct phy_device *phydev = to_phy_device(dev); | |
551 | const char *mode = NULL; | |
552 | ||
553 | if (phy_is_internal(phydev)) | |
554 | mode = "internal"; | |
555 | else | |
556 | mode = phy_modes(phydev->interface); | |
557 | ||
558 | return sprintf(buf, "%s\n", mode); | |
559 | } | |
560 | static DEVICE_ATTR_RO(phy_interface); | |
561 | ||
562 | static ssize_t | |
563 | phy_has_fixups_show(struct device *dev, struct device_attribute *attr, | |
564 | char *buf) | |
565 | { | |
566 | struct phy_device *phydev = to_phy_device(dev); | |
567 | ||
568 | return sprintf(buf, "%d\n", phydev->has_fixups); | |
569 | } | |
570 | static DEVICE_ATTR_RO(phy_has_fixups); | |
571 | ||
572 | static struct attribute *phy_dev_attrs[] = { | |
573 | &dev_attr_phy_id.attr, | |
574 | &dev_attr_phy_interface.attr, | |
575 | &dev_attr_phy_has_fixups.attr, | |
576 | NULL, | |
577 | }; | |
578 | ATTRIBUTE_GROUPS(phy_dev); | |
579 | ||
4dea547f GL |
580 | /** |
581 | * phy_device_register - Register the phy device on the MDIO bus | |
1d4ac5d5 | 582 | * @phydev: phy_device structure to be added to the MDIO bus |
4dea547f GL |
583 | */ |
584 | int phy_device_register(struct phy_device *phydev) | |
585 | { | |
586 | int err; | |
587 | ||
7f854420 AL |
588 | err = mdiobus_register_device(&phydev->mdio); |
589 | if (err) | |
590 | return err; | |
4dea547f GL |
591 | |
592 | /* Run all of the fixups for this PHY */ | |
d92f5dec | 593 | err = phy_scan_fixups(phydev); |
87aa9f9c | 594 | if (err) { |
e5a03bfd | 595 | pr_err("PHY %d failed to initialize\n", phydev->mdio.addr); |
87aa9f9c FF |
596 | goto out; |
597 | } | |
4dea547f | 598 | |
5cf11bee AL |
599 | phydev->mdio.dev.groups = phy_dev_groups; |
600 | ||
e5a03bfd | 601 | err = device_add(&phydev->mdio.dev); |
4dea547f | 602 | if (err) { |
e5a03bfd | 603 | pr_err("PHY %d failed to add\n", phydev->mdio.addr); |
4dea547f GL |
604 | goto out; |
605 | } | |
606 | ||
607 | return 0; | |
608 | ||
609 | out: | |
7f854420 | 610 | mdiobus_unregister_device(&phydev->mdio); |
4dea547f GL |
611 | return err; |
612 | } | |
613 | EXPORT_SYMBOL(phy_device_register); | |
00db8189 | 614 | |
38737e49 RK |
615 | /** |
616 | * phy_device_remove - Remove a previously registered phy device from the MDIO bus | |
617 | * @phydev: phy_device structure to remove | |
618 | * | |
619 | * This doesn't free the phy_device itself, it merely reverses the effects | |
620 | * of phy_device_register(). Use phy_device_free() to free the device | |
621 | * after calling this function. | |
622 | */ | |
623 | void phy_device_remove(struct phy_device *phydev) | |
624 | { | |
e5a03bfd | 625 | device_del(&phydev->mdio.dev); |
7f854420 | 626 | mdiobus_unregister_device(&phydev->mdio); |
38737e49 RK |
627 | } |
628 | EXPORT_SYMBOL(phy_device_remove); | |
629 | ||
f8f76db1 JP |
630 | /** |
631 | * phy_find_first - finds the first PHY device on the bus | |
632 | * @bus: the target MII bus | |
633 | */ | |
634 | struct phy_device *phy_find_first(struct mii_bus *bus) | |
635 | { | |
7f854420 | 636 | struct phy_device *phydev; |
f8f76db1 JP |
637 | int addr; |
638 | ||
639 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { | |
7f854420 AL |
640 | phydev = mdiobus_get_phy(bus, addr); |
641 | if (phydev) | |
642 | return phydev; | |
f8f76db1 JP |
643 | } |
644 | return NULL; | |
645 | } | |
646 | EXPORT_SYMBOL(phy_find_first); | |
647 | ||
b3df0da8 RD |
648 | /** |
649 | * phy_prepare_link - prepares the PHY layer to monitor link status | |
650 | * @phydev: target phy_device struct | |
651 | * @handler: callback function for link status change notifications | |
00db8189 | 652 | * |
b3df0da8 | 653 | * Description: Tells the PHY infrastructure to handle the |
00db8189 AF |
654 | * gory details on monitoring link status (whether through |
655 | * polling or an interrupt), and to call back to the | |
656 | * connected device driver when the link status changes. | |
657 | * If you want to monitor your own link state, don't call | |
b3df0da8 RD |
658 | * this function. |
659 | */ | |
89ff05ec | 660 | static void phy_prepare_link(struct phy_device *phydev, |
2f53e904 | 661 | void (*handler)(struct net_device *)) |
00db8189 AF |
662 | { |
663 | phydev->adjust_link = handler; | |
664 | } | |
665 | ||
fa94f6d9 GL |
666 | /** |
667 | * phy_connect_direct - connect an ethernet device to a specific phy_device | |
668 | * @dev: the network device to connect | |
669 | * @phydev: the pointer to the phy device | |
670 | * @handler: callback function for state change notifications | |
fa94f6d9 GL |
671 | * @interface: PHY device's interface |
672 | */ | |
673 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, | |
f9a8f83b | 674 | void (*handler)(struct net_device *), |
fa94f6d9 GL |
675 | phy_interface_t interface) |
676 | { | |
677 | int rc; | |
678 | ||
f9a8f83b | 679 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
fa94f6d9 GL |
680 | if (rc) |
681 | return rc; | |
682 | ||
683 | phy_prepare_link(phydev, handler); | |
29935aeb | 684 | phy_start_machine(phydev); |
fa94f6d9 GL |
685 | if (phydev->irq > 0) |
686 | phy_start_interrupts(phydev); | |
687 | ||
688 | return 0; | |
689 | } | |
690 | EXPORT_SYMBOL(phy_connect_direct); | |
691 | ||
b3df0da8 RD |
692 | /** |
693 | * phy_connect - connect an ethernet device to a PHY device | |
694 | * @dev: the network device to connect | |
5d12b132 | 695 | * @bus_id: the id string of the PHY device to connect |
b3df0da8 | 696 | * @handler: callback function for state change notifications |
b3df0da8 | 697 | * @interface: PHY device's interface |
e1393456 | 698 | * |
b3df0da8 | 699 | * Description: Convenience function for connecting ethernet |
e1393456 AF |
700 | * devices to PHY devices. The default behavior is for |
701 | * the PHY infrastructure to handle everything, and only notify | |
702 | * the connected driver when the link status changes. If you | |
703 | * don't want, or can't use the provided functionality, you may | |
704 | * choose to call only the subset of functions which provide | |
705 | * the desired functionality. | |
706 | */ | |
e109374f | 707 | struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, |
2f53e904 SS |
708 | void (*handler)(struct net_device *), |
709 | phy_interface_t interface) | |
e1393456 AF |
710 | { |
711 | struct phy_device *phydev; | |
fa94f6d9 GL |
712 | struct device *d; |
713 | int rc; | |
e1393456 | 714 | |
fa94f6d9 | 715 | /* Search the list of PHY devices on the mdio bus for the |
2f53e904 SS |
716 | * PHY with the requested name |
717 | */ | |
fa94f6d9 GL |
718 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); |
719 | if (!d) { | |
720 | pr_err("PHY %s not found\n", bus_id); | |
721 | return ERR_PTR(-ENODEV); | |
722 | } | |
723 | phydev = to_phy_device(d); | |
e1393456 | 724 | |
f9a8f83b | 725 | rc = phy_connect_direct(dev, phydev, handler, interface); |
17ae1c65 | 726 | put_device(d); |
fa94f6d9 GL |
727 | if (rc) |
728 | return ERR_PTR(rc); | |
e1393456 AF |
729 | |
730 | return phydev; | |
731 | } | |
732 | EXPORT_SYMBOL(phy_connect); | |
733 | ||
b3df0da8 | 734 | /** |
2f53e904 SS |
735 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY |
736 | * device | |
b3df0da8 RD |
737 | * @phydev: target phy_device struct |
738 | */ | |
e1393456 AF |
739 | void phy_disconnect(struct phy_device *phydev) |
740 | { | |
741 | if (phydev->irq > 0) | |
742 | phy_stop_interrupts(phydev); | |
743 | ||
744 | phy_stop_machine(phydev); | |
e109374f | 745 | |
e1393456 AF |
746 | phydev->adjust_link = NULL; |
747 | ||
748 | phy_detach(phydev); | |
749 | } | |
750 | EXPORT_SYMBOL(phy_disconnect); | |
751 | ||
87aa9f9c FF |
752 | /** |
753 | * phy_poll_reset - Safely wait until a PHY reset has properly completed | |
754 | * @phydev: The PHY device to poll | |
755 | * | |
756 | * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as | |
757 | * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR | |
758 | * register must be polled until the BMCR_RESET bit clears. | |
759 | * | |
760 | * Furthermore, any attempts to write to PHY registers may have no effect | |
761 | * or even generate MDIO bus errors until this is complete. | |
762 | * | |
763 | * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the | |
764 | * standard and do not fully reset after the BMCR_RESET bit is set, and may | |
765 | * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an | |
766 | * effort to support such broken PHYs, this function is separate from the | |
767 | * standard phy_init_hw() which will zero all the other bits in the BMCR | |
768 | * and reapply all driver-specific and board-specific fixups. | |
769 | */ | |
770 | static int phy_poll_reset(struct phy_device *phydev) | |
771 | { | |
772 | /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ | |
773 | unsigned int retries = 12; | |
774 | int ret; | |
775 | ||
776 | do { | |
777 | msleep(50); | |
778 | ret = phy_read(phydev, MII_BMCR); | |
779 | if (ret < 0) | |
780 | return ret; | |
781 | } while (ret & BMCR_RESET && --retries); | |
782 | if (ret & BMCR_RESET) | |
783 | return -ETIMEDOUT; | |
784 | ||
2f53e904 | 785 | /* Some chips (smsc911x) may still need up to another 1ms after the |
87aa9f9c FF |
786 | * BMCR_RESET bit is cleared before they are usable. |
787 | */ | |
788 | msleep(1); | |
789 | return 0; | |
790 | } | |
791 | ||
2f5cb434 AV |
792 | int phy_init_hw(struct phy_device *phydev) |
793 | { | |
9df81dd7 | 794 | int ret = 0; |
2f5cb434 AV |
795 | |
796 | if (!phydev->drv || !phydev->drv->config_init) | |
797 | return 0; | |
798 | ||
9df81dd7 FF |
799 | if (phydev->drv->soft_reset) |
800 | ret = phydev->drv->soft_reset(phydev); | |
801 | else | |
802 | ret = genphy_soft_reset(phydev); | |
803 | ||
87aa9f9c FF |
804 | if (ret < 0) |
805 | return ret; | |
806 | ||
2f5cb434 AV |
807 | ret = phy_scan_fixups(phydev); |
808 | if (ret < 0) | |
809 | return ret; | |
810 | ||
811 | return phydev->drv->config_init(phydev); | |
812 | } | |
87aa9f9c | 813 | EXPORT_SYMBOL(phy_init_hw); |
2f5cb434 | 814 | |
2220943a AL |
815 | void phy_attached_info(struct phy_device *phydev) |
816 | { | |
817 | phy_attached_print(phydev, NULL); | |
818 | } | |
819 | EXPORT_SYMBOL(phy_attached_info); | |
820 | ||
821 | #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)" | |
822 | void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) | |
823 | { | |
824 | if (!fmt) { | |
e5a03bfd | 825 | dev_info(&phydev->mdio.dev, ATTACHED_FMT "\n", |
2220943a AL |
826 | phydev->drv->name, phydev_name(phydev), |
827 | phydev->irq); | |
828 | } else { | |
829 | va_list ap; | |
830 | ||
e5a03bfd | 831 | dev_info(&phydev->mdio.dev, ATTACHED_FMT, |
2220943a AL |
832 | phydev->drv->name, phydev_name(phydev), |
833 | phydev->irq); | |
834 | ||
835 | va_start(ap, fmt); | |
836 | vprintk(fmt, ap); | |
837 | va_end(ap); | |
838 | } | |
839 | } | |
840 | EXPORT_SYMBOL(phy_attached_print); | |
841 | ||
b3df0da8 | 842 | /** |
fa94f6d9 | 843 | * phy_attach_direct - attach a network device to a given PHY device pointer |
b3df0da8 | 844 | * @dev: network device to attach |
fa94f6d9 | 845 | * @phydev: Pointer to phy_device to attach |
b3df0da8 RD |
846 | * @flags: PHY device's dev_flags |
847 | * @interface: PHY device's interface | |
e1393456 | 848 | * |
b3df0da8 | 849 | * Description: Called by drivers to attach to a particular PHY |
e1393456 | 850 | * device. The phy_device is found, and properly hooked up |
257184d7 AF |
851 | * to the phy_driver. If no driver is attached, then a |
852 | * generic driver is used. The phy_device is given a ptr to | |
e1393456 | 853 | * the attaching device, and given a callback for link status |
b3df0da8 | 854 | * change. The phy_device is returned to the attaching driver. |
7322967b | 855 | * This function takes a reference on the phy device. |
e1393456 | 856 | */ |
257184d7 AF |
857 | int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
858 | u32 flags, phy_interface_t interface) | |
e1393456 | 859 | { |
e5a03bfd AL |
860 | struct mii_bus *bus = phydev->mdio.bus; |
861 | struct device *d = &phydev->mdio.dev; | |
d005a09e | 862 | int err; |
e1393456 | 863 | |
3e3aaf64 RK |
864 | if (!try_module_get(bus->owner)) { |
865 | dev_err(&dev->dev, "failed to get the bus module\n"); | |
866 | return -EIO; | |
867 | } | |
868 | ||
7322967b RK |
869 | get_device(d); |
870 | ||
e1393456 | 871 | /* Assume that if there is no driver, that it doesn't |
2f53e904 SS |
872 | * exist, and we should use the genphy driver. |
873 | */ | |
ef899c07 | 874 | if (!d->driver) { |
257184d7 | 875 | if (phydev->is_c45) |
a9049e0c AL |
876 | d->driver = |
877 | &genphy_driver[GENPHY_DRV_10G].mdiodrv.driver; | |
257184d7 | 878 | else |
a9049e0c AL |
879 | d->driver = |
880 | &genphy_driver[GENPHY_DRV_1G].mdiodrv.driver; | |
e1393456 AF |
881 | |
882 | err = d->driver->probe(d); | |
b7a00ecd JG |
883 | if (err >= 0) |
884 | err = device_bind_driver(d); | |
e1393456 | 885 | |
b7a00ecd | 886 | if (err) |
3e3aaf64 | 887 | goto error; |
e1393456 AF |
888 | } |
889 | ||
890 | if (phydev->attached_dev) { | |
fa94f6d9 | 891 | dev_err(&dev->dev, "PHY already attached\n"); |
3e3aaf64 RK |
892 | err = -EBUSY; |
893 | goto error; | |
b3565f27 EG |
894 | } |
895 | ||
e1393456 | 896 | phydev->attached_dev = dev; |
c1f19b51 | 897 | dev->phydev = phydev; |
e1393456 AF |
898 | |
899 | phydev->dev_flags = flags; | |
900 | ||
e8a2b6a4 AF |
901 | phydev->interface = interface; |
902 | ||
ef24b16b AV |
903 | phydev->state = PHY_READY; |
904 | ||
113c74d8 SS |
905 | /* Initial carrier state is off as the phy is about to be |
906 | * (re)initialized. | |
907 | */ | |
908 | netif_carrier_off(phydev->attached_dev); | |
909 | ||
e8a2b6a4 AF |
910 | /* Do initial configuration here, now that |
911 | * we have certain key parameters | |
2f53e904 SS |
912 | * (dev_flags and interface) |
913 | */ | |
d005a09e MKB |
914 | err = phy_init_hw(phydev); |
915 | if (err) | |
916 | phy_detach(phydev); | |
b394745d GR |
917 | else |
918 | phy_resume(phydev); | |
1211ce53 | 919 | |
d005a09e | 920 | return err; |
3e3aaf64 RK |
921 | |
922 | error: | |
7322967b | 923 | put_device(d); |
3e3aaf64 RK |
924 | module_put(bus->owner); |
925 | return err; | |
fa94f6d9 | 926 | } |
257184d7 | 927 | EXPORT_SYMBOL(phy_attach_direct); |
fa94f6d9 GL |
928 | |
929 | /** | |
930 | * phy_attach - attach a network device to a particular PHY device | |
931 | * @dev: network device to attach | |
932 | * @bus_id: Bus ID of PHY device to attach | |
fa94f6d9 GL |
933 | * @interface: PHY device's interface |
934 | * | |
935 | * Description: Same as phy_attach_direct() except that a PHY bus_id | |
936 | * string is passed instead of a pointer to a struct phy_device. | |
937 | */ | |
2f53e904 SS |
938 | struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, |
939 | phy_interface_t interface) | |
fa94f6d9 GL |
940 | { |
941 | struct bus_type *bus = &mdio_bus_type; | |
942 | struct phy_device *phydev; | |
943 | struct device *d; | |
944 | int rc; | |
945 | ||
946 | /* Search the list of PHY devices on the mdio bus for the | |
2f53e904 SS |
947 | * PHY with the requested name |
948 | */ | |
fa94f6d9 GL |
949 | d = bus_find_device_by_name(bus, NULL, bus_id); |
950 | if (!d) { | |
951 | pr_err("PHY %s not found\n", bus_id); | |
952 | return ERR_PTR(-ENODEV); | |
e8a2b6a4 | 953 | } |
fa94f6d9 GL |
954 | phydev = to_phy_device(d); |
955 | ||
f9a8f83b | 956 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
17ae1c65 | 957 | put_device(d); |
fa94f6d9 GL |
958 | if (rc) |
959 | return ERR_PTR(rc); | |
e8a2b6a4 | 960 | |
e1393456 AF |
961 | return phydev; |
962 | } | |
963 | EXPORT_SYMBOL(phy_attach); | |
964 | ||
b3df0da8 RD |
965 | /** |
966 | * phy_detach - detach a PHY device from its network device | |
967 | * @phydev: target phy_device struct | |
7322967b RK |
968 | * |
969 | * This detaches the phy device from its network device and the phy | |
970 | * driver, and drops the reference count taken in phy_attach_direct(). | |
b3df0da8 | 971 | */ |
e1393456 AF |
972 | void phy_detach(struct phy_device *phydev) |
973 | { | |
3e3aaf64 | 974 | struct mii_bus *bus; |
ab2145ed | 975 | int i; |
b3565f27 | 976 | |
c1f19b51 | 977 | phydev->attached_dev->phydev = NULL; |
e1393456 | 978 | phydev->attached_dev = NULL; |
1211ce53 | 979 | phy_suspend(phydev); |
e1393456 AF |
980 | |
981 | /* If the device had no specific driver before (i.e. - it | |
982 | * was using the generic driver), we unbind the device | |
983 | * from the generic driver so that there's a chance a | |
2f53e904 SS |
984 | * real driver could be loaded |
985 | */ | |
ab2145ed | 986 | for (i = 0; i < ARRAY_SIZE(genphy_driver); i++) { |
a9049e0c AL |
987 | if (phydev->mdio.dev.driver == |
988 | &genphy_driver[i].mdiodrv.driver) { | |
e5a03bfd | 989 | device_release_driver(&phydev->mdio.dev); |
ab2145ed SX |
990 | break; |
991 | } | |
992 | } | |
3e3aaf64 | 993 | |
7322967b RK |
994 | /* |
995 | * The phydev might go away on the put_device() below, so avoid | |
996 | * a use-after-free bug by reading the underlying bus first. | |
997 | */ | |
e5a03bfd | 998 | bus = phydev->mdio.bus; |
3e3aaf64 | 999 | |
e5a03bfd | 1000 | put_device(&phydev->mdio.dev); |
3e3aaf64 | 1001 | module_put(bus->owner); |
e1393456 AF |
1002 | } |
1003 | EXPORT_SYMBOL(phy_detach); | |
1004 | ||
481b5d93 SH |
1005 | int phy_suspend(struct phy_device *phydev) |
1006 | { | |
e5a03bfd | 1007 | struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); |
32fc3fd4 | 1008 | struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; |
8a477a6f | 1009 | int ret = 0; |
481b5d93 SH |
1010 | |
1011 | /* If the device has WOL enabled, we cannot suspend the PHY */ | |
481b5d93 SH |
1012 | phy_ethtool_get_wol(phydev, &wol); |
1013 | if (wol.wolopts) | |
1014 | return -EBUSY; | |
1015 | ||
1016 | if (phydrv->suspend) | |
8a477a6f FF |
1017 | ret = phydrv->suspend(phydev); |
1018 | ||
1019 | if (ret) | |
1020 | return ret; | |
1021 | ||
1022 | phydev->suspended = true; | |
1023 | ||
1024 | return ret; | |
481b5d93 | 1025 | } |
ca127697 | 1026 | EXPORT_SYMBOL(phy_suspend); |
481b5d93 SH |
1027 | |
1028 | int phy_resume(struct phy_device *phydev) | |
1029 | { | |
e5a03bfd | 1030 | struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); |
8a477a6f | 1031 | int ret = 0; |
481b5d93 SH |
1032 | |
1033 | if (phydrv->resume) | |
8a477a6f FF |
1034 | ret = phydrv->resume(phydev); |
1035 | ||
1036 | if (ret) | |
1037 | return ret; | |
1038 | ||
1039 | phydev->suspended = false; | |
1040 | ||
1041 | return ret; | |
481b5d93 | 1042 | } |
ca127697 | 1043 | EXPORT_SYMBOL(phy_resume); |
e1393456 | 1044 | |
00db8189 AF |
1045 | /* Generic PHY support and helper functions */ |
1046 | ||
b3df0da8 | 1047 | /** |
25985edc | 1048 | * genphy_config_advert - sanitize and advertise auto-negotiation parameters |
b3df0da8 | 1049 | * @phydev: target phy_device struct |
00db8189 | 1050 | * |
b3df0da8 | 1051 | * Description: Writes MII_ADVERTISE with the appropriate values, |
00db8189 | 1052 | * after sanitizing the values to make sure we only advertise |
51e2a384 TP |
1053 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
1054 | * hasn't changed, and > 0 if it has changed. | |
00db8189 | 1055 | */ |
89ff05ec | 1056 | static int genphy_config_advert(struct phy_device *phydev) |
00db8189 AF |
1057 | { |
1058 | u32 advertise; | |
5273e3a5 | 1059 | int oldadv, adv, bmsr; |
51e2a384 | 1060 | int err, changed = 0; |
00db8189 | 1061 | |
2f53e904 | 1062 | /* Only allow advertising what this PHY supports */ |
00db8189 AF |
1063 | phydev->advertising &= phydev->supported; |
1064 | advertise = phydev->advertising; | |
1065 | ||
1066 | /* Setup standard advertisement */ | |
2f53e904 | 1067 | adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
1068 | if (adv < 0) |
1069 | return adv; | |
1070 | ||
2f53e904 | 1071 | oldadv = adv; |
28011cf1 | 1072 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | |
00db8189 | 1073 | ADVERTISE_PAUSE_ASYM); |
37f07023 | 1074 | adv |= ethtool_adv_to_mii_adv_t(advertise); |
00db8189 | 1075 | |
51e2a384 TP |
1076 | if (adv != oldadv) { |
1077 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
00db8189 | 1078 | |
51e2a384 TP |
1079 | if (err < 0) |
1080 | return err; | |
1081 | changed = 1; | |
1082 | } | |
00db8189 | 1083 | |
5273e3a5 FF |
1084 | bmsr = phy_read(phydev, MII_BMSR); |
1085 | if (bmsr < 0) | |
1086 | return bmsr; | |
1087 | ||
1088 | /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all | |
1089 | * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a | |
1090 | * logical 1. | |
1091 | */ | |
1092 | if (!(bmsr & BMSR_ESTATEN)) | |
1093 | return changed; | |
1094 | ||
00db8189 | 1095 | /* Configure gigabit if it's supported */ |
5273e3a5 FF |
1096 | adv = phy_read(phydev, MII_CTRL1000); |
1097 | if (adv < 0) | |
1098 | return adv; | |
1099 | ||
1100 | oldadv = adv; | |
1101 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); | |
1102 | ||
00db8189 | 1103 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
2f53e904 | 1104 | SUPPORTED_1000baseT_Full)) { |
37f07023 | 1105 | adv |= ethtool_adv_to_mii_ctrl1000_t(advertise); |
00db8189 AF |
1106 | } |
1107 | ||
eb686231 M |
1108 | if (adv != oldadv) |
1109 | changed = 1; | |
1110 | ||
5273e3a5 FF |
1111 | err = phy_write(phydev, MII_CTRL1000, adv); |
1112 | if (err < 0) | |
1113 | return err; | |
1114 | ||
51e2a384 | 1115 | return changed; |
00db8189 | 1116 | } |
00db8189 | 1117 | |
b3df0da8 RD |
1118 | /** |
1119 | * genphy_setup_forced - configures/forces speed/duplex from @phydev | |
1120 | * @phydev: target phy_device struct | |
00db8189 | 1121 | * |
b3df0da8 | 1122 | * Description: Configures MII_BMCR to force speed/duplex |
00db8189 | 1123 | * to the values in phydev. Assumes that the values are valid. |
b3df0da8 RD |
1124 | * Please see phy_sanitize_settings(). |
1125 | */ | |
3fb69bca | 1126 | int genphy_setup_forced(struct phy_device *phydev) |
00db8189 | 1127 | { |
f48256ef | 1128 | int ctl = phy_read(phydev, MII_BMCR); |
00db8189 | 1129 | |
f48256ef | 1130 | ctl &= BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN; |
2f53e904 SS |
1131 | phydev->pause = 0; |
1132 | phydev->asym_pause = 0; | |
00db8189 AF |
1133 | |
1134 | if (SPEED_1000 == phydev->speed) | |
1135 | ctl |= BMCR_SPEED1000; | |
1136 | else if (SPEED_100 == phydev->speed) | |
1137 | ctl |= BMCR_SPEED100; | |
1138 | ||
1139 | if (DUPLEX_FULL == phydev->duplex) | |
1140 | ctl |= BMCR_FULLDPLX; | |
e109374f | 1141 | |
e62a768f | 1142 | return phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 1143 | } |
3fb69bca | 1144 | EXPORT_SYMBOL(genphy_setup_forced); |
00db8189 | 1145 | |
b3df0da8 RD |
1146 | /** |
1147 | * genphy_restart_aneg - Enable and Restart Autonegotiation | |
1148 | * @phydev: target phy_device struct | |
1149 | */ | |
00db8189 AF |
1150 | int genphy_restart_aneg(struct phy_device *phydev) |
1151 | { | |
553fe92b | 1152 | int ctl = phy_read(phydev, MII_BMCR); |
00db8189 AF |
1153 | |
1154 | if (ctl < 0) | |
1155 | return ctl; | |
1156 | ||
2f53e904 | 1157 | ctl |= BMCR_ANENABLE | BMCR_ANRESTART; |
00db8189 AF |
1158 | |
1159 | /* Don't isolate the PHY if we're negotiating */ | |
2f53e904 | 1160 | ctl &= ~BMCR_ISOLATE; |
00db8189 | 1161 | |
553fe92b | 1162 | return phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 1163 | } |
892871dc | 1164 | EXPORT_SYMBOL(genphy_restart_aneg); |
00db8189 | 1165 | |
b3df0da8 RD |
1166 | /** |
1167 | * genphy_config_aneg - restart auto-negotiation or write BMCR | |
1168 | * @phydev: target phy_device struct | |
00db8189 | 1169 | * |
b3df0da8 | 1170 | * Description: If auto-negotiation is enabled, we configure the |
00db8189 | 1171 | * advertising, and then restart auto-negotiation. If it is not |
b3df0da8 | 1172 | * enabled, then we write the BMCR. |
00db8189 AF |
1173 | */ |
1174 | int genphy_config_aneg(struct phy_device *phydev) | |
1175 | { | |
de339c2a | 1176 | int result; |
00db8189 | 1177 | |
de339c2a TP |
1178 | if (AUTONEG_ENABLE != phydev->autoneg) |
1179 | return genphy_setup_forced(phydev); | |
00db8189 | 1180 | |
de339c2a | 1181 | result = genphy_config_advert(phydev); |
de339c2a TP |
1182 | if (result < 0) /* error */ |
1183 | return result; | |
de339c2a | 1184 | if (result == 0) { |
25985edc | 1185 | /* Advertisement hasn't changed, but maybe aneg was never on to |
2f53e904 SS |
1186 | * begin with? Or maybe phy was isolated? |
1187 | */ | |
de339c2a TP |
1188 | int ctl = phy_read(phydev, MII_BMCR); |
1189 | ||
1190 | if (ctl < 0) | |
1191 | return ctl; | |
1192 | ||
1193 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) | |
1194 | result = 1; /* do restart aneg */ | |
1195 | } | |
1196 | ||
1197 | /* Only restart aneg if we are advertising something different | |
2f53e904 SS |
1198 | * than we were before. |
1199 | */ | |
de339c2a TP |
1200 | if (result > 0) |
1201 | result = genphy_restart_aneg(phydev); | |
00db8189 | 1202 | |
51e2a384 | 1203 | return result; |
00db8189 AF |
1204 | } |
1205 | EXPORT_SYMBOL(genphy_config_aneg); | |
1206 | ||
a9fa6e6a FF |
1207 | /** |
1208 | * genphy_aneg_done - return auto-negotiation status | |
1209 | * @phydev: target phy_device struct | |
1210 | * | |
1211 | * Description: Reads the status register and returns 0 either if | |
1212 | * auto-negotiation is incomplete, or if there was an error. | |
1213 | * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. | |
1214 | */ | |
1215 | int genphy_aneg_done(struct phy_device *phydev) | |
1216 | { | |
1217 | int retval = phy_read(phydev, MII_BMSR); | |
1218 | ||
1219 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); | |
1220 | } | |
1221 | EXPORT_SYMBOL(genphy_aneg_done); | |
1222 | ||
395056ed | 1223 | static int gen10g_config_aneg(struct phy_device *phydev) |
124059fd AF |
1224 | { |
1225 | return 0; | |
1226 | } | |
124059fd | 1227 | |
b3df0da8 RD |
1228 | /** |
1229 | * genphy_update_link - update link status in @phydev | |
1230 | * @phydev: target phy_device struct | |
00db8189 | 1231 | * |
b3df0da8 | 1232 | * Description: Update the value in phydev->link to reflect the |
00db8189 | 1233 | * current link value. In order to do this, we need to read |
b3df0da8 | 1234 | * the status register twice, keeping the second value. |
00db8189 AF |
1235 | */ |
1236 | int genphy_update_link(struct phy_device *phydev) | |
1237 | { | |
1238 | int status; | |
1239 | ||
1240 | /* Do a fake read */ | |
1241 | status = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
1242 | if (status < 0) |
1243 | return status; | |
1244 | ||
1245 | /* Read link and autonegotiation status */ | |
1246 | status = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
1247 | if (status < 0) |
1248 | return status; | |
1249 | ||
1250 | if ((status & BMSR_LSTATUS) == 0) | |
1251 | phydev->link = 0; | |
1252 | else | |
1253 | phydev->link = 1; | |
1254 | ||
1255 | return 0; | |
1256 | } | |
6b655529 | 1257 | EXPORT_SYMBOL(genphy_update_link); |
00db8189 | 1258 | |
b3df0da8 RD |
1259 | /** |
1260 | * genphy_read_status - check the link status and update current link state | |
1261 | * @phydev: target phy_device struct | |
00db8189 | 1262 | * |
b3df0da8 | 1263 | * Description: Check the link, then figure out the current state |
00db8189 AF |
1264 | * by comparing what we advertise with what the link partner |
1265 | * advertises. Start by checking the gigabit possibilities, | |
1266 | * then move on to 10/100. | |
1267 | */ | |
1268 | int genphy_read_status(struct phy_device *phydev) | |
1269 | { | |
1270 | int adv; | |
1271 | int err; | |
1272 | int lpa; | |
1273 | int lpagb = 0; | |
a4572e0c CB |
1274 | int common_adv; |
1275 | int common_adv_gb = 0; | |
00db8189 | 1276 | |
2f53e904 | 1277 | /* Update the link, but return if there was an error */ |
00db8189 AF |
1278 | err = genphy_update_link(phydev); |
1279 | if (err) | |
1280 | return err; | |
1281 | ||
114002bc FF |
1282 | phydev->lp_advertising = 0; |
1283 | ||
00db8189 AF |
1284 | if (AUTONEG_ENABLE == phydev->autoneg) { |
1285 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
1286 | | SUPPORTED_1000baseT_Full)) { | |
1287 | lpagb = phy_read(phydev, MII_STAT1000); | |
00db8189 AF |
1288 | if (lpagb < 0) |
1289 | return lpagb; | |
1290 | ||
1291 | adv = phy_read(phydev, MII_CTRL1000); | |
00db8189 AF |
1292 | if (adv < 0) |
1293 | return adv; | |
1294 | ||
114002bc FF |
1295 | phydev->lp_advertising = |
1296 | mii_stat1000_to_ethtool_lpa_t(lpagb); | |
a4572e0c | 1297 | common_adv_gb = lpagb & adv << 2; |
00db8189 AF |
1298 | } |
1299 | ||
1300 | lpa = phy_read(phydev, MII_LPA); | |
00db8189 AF |
1301 | if (lpa < 0) |
1302 | return lpa; | |
1303 | ||
114002bc FF |
1304 | phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa); |
1305 | ||
00db8189 | 1306 | adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
1307 | if (adv < 0) |
1308 | return adv; | |
1309 | ||
a4572e0c | 1310 | common_adv = lpa & adv; |
00db8189 AF |
1311 | |
1312 | phydev->speed = SPEED_10; | |
1313 | phydev->duplex = DUPLEX_HALF; | |
2f53e904 SS |
1314 | phydev->pause = 0; |
1315 | phydev->asym_pause = 0; | |
00db8189 | 1316 | |
a4572e0c | 1317 | if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) { |
00db8189 AF |
1318 | phydev->speed = SPEED_1000; |
1319 | ||
a4572e0c | 1320 | if (common_adv_gb & LPA_1000FULL) |
00db8189 | 1321 | phydev->duplex = DUPLEX_FULL; |
a4572e0c | 1322 | } else if (common_adv & (LPA_100FULL | LPA_100HALF)) { |
00db8189 | 1323 | phydev->speed = SPEED_100; |
e109374f | 1324 | |
a4572e0c | 1325 | if (common_adv & LPA_100FULL) |
00db8189 AF |
1326 | phydev->duplex = DUPLEX_FULL; |
1327 | } else | |
a4572e0c | 1328 | if (common_adv & LPA_10FULL) |
00db8189 AF |
1329 | phydev->duplex = DUPLEX_FULL; |
1330 | ||
e109374f | 1331 | if (phydev->duplex == DUPLEX_FULL) { |
00db8189 AF |
1332 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; |
1333 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
1334 | } | |
1335 | } else { | |
1336 | int bmcr = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1337 | |
00db8189 AF |
1338 | if (bmcr < 0) |
1339 | return bmcr; | |
1340 | ||
1341 | if (bmcr & BMCR_FULLDPLX) | |
1342 | phydev->duplex = DUPLEX_FULL; | |
1343 | else | |
1344 | phydev->duplex = DUPLEX_HALF; | |
1345 | ||
1346 | if (bmcr & BMCR_SPEED1000) | |
1347 | phydev->speed = SPEED_1000; | |
1348 | else if (bmcr & BMCR_SPEED100) | |
1349 | phydev->speed = SPEED_100; | |
1350 | else | |
1351 | phydev->speed = SPEED_10; | |
1352 | ||
2f53e904 SS |
1353 | phydev->pause = 0; |
1354 | phydev->asym_pause = 0; | |
00db8189 AF |
1355 | } |
1356 | ||
1357 | return 0; | |
1358 | } | |
1359 | EXPORT_SYMBOL(genphy_read_status); | |
1360 | ||
395056ed | 1361 | static int gen10g_read_status(struct phy_device *phydev) |
124059fd AF |
1362 | { |
1363 | int devad, reg; | |
1364 | u32 mmd_mask = phydev->c45_ids.devices_in_package; | |
1365 | ||
1366 | phydev->link = 1; | |
1367 | ||
1368 | /* For now just lie and say it's 10G all the time */ | |
1369 | phydev->speed = SPEED_10000; | |
1370 | phydev->duplex = DUPLEX_FULL; | |
1371 | ||
1372 | for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) { | |
1373 | if (!(mmd_mask & 1)) | |
1374 | continue; | |
1375 | ||
1376 | /* Read twice because link state is latched and a | |
1377 | * read moves the current state into the register | |
1378 | */ | |
1379 | phy_read_mmd(phydev, devad, MDIO_STAT1); | |
1380 | reg = phy_read_mmd(phydev, devad, MDIO_STAT1); | |
1381 | if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS)) | |
1382 | phydev->link = 0; | |
1383 | } | |
1384 | ||
1385 | return 0; | |
1386 | } | |
124059fd | 1387 | |
797ac071 FF |
1388 | /** |
1389 | * genphy_soft_reset - software reset the PHY via BMCR_RESET bit | |
1390 | * @phydev: target phy_device struct | |
1391 | * | |
1392 | * Description: Perform a software PHY reset using the standard | |
1393 | * BMCR_RESET bit and poll for the reset bit to be cleared. | |
1394 | * | |
1395 | * Returns: 0 on success, < 0 on failure | |
1396 | */ | |
1397 | int genphy_soft_reset(struct phy_device *phydev) | |
1398 | { | |
1399 | int ret; | |
1400 | ||
1401 | ret = phy_write(phydev, MII_BMCR, BMCR_RESET); | |
1402 | if (ret < 0) | |
1403 | return ret; | |
1404 | ||
1405 | return phy_poll_reset(phydev); | |
1406 | } | |
1407 | EXPORT_SYMBOL(genphy_soft_reset); | |
1408 | ||
af6b6967 | 1409 | int genphy_config_init(struct phy_device *phydev) |
00db8189 | 1410 | { |
84c22d79 | 1411 | int val; |
00db8189 AF |
1412 | u32 features; |
1413 | ||
00db8189 AF |
1414 | features = (SUPPORTED_TP | SUPPORTED_MII |
1415 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
cd772de3 | 1416 | SUPPORTED_BNC | SUPPORTED_Pause | SUPPORTED_Asym_Pause); |
00db8189 AF |
1417 | |
1418 | /* Do we support autonegotiation? */ | |
1419 | val = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
1420 | if (val < 0) |
1421 | return val; | |
1422 | ||
1423 | if (val & BMSR_ANEGCAPABLE) | |
1424 | features |= SUPPORTED_Autoneg; | |
1425 | ||
1426 | if (val & BMSR_100FULL) | |
1427 | features |= SUPPORTED_100baseT_Full; | |
1428 | if (val & BMSR_100HALF) | |
1429 | features |= SUPPORTED_100baseT_Half; | |
1430 | if (val & BMSR_10FULL) | |
1431 | features |= SUPPORTED_10baseT_Full; | |
1432 | if (val & BMSR_10HALF) | |
1433 | features |= SUPPORTED_10baseT_Half; | |
1434 | ||
1435 | if (val & BMSR_ESTATEN) { | |
1436 | val = phy_read(phydev, MII_ESTATUS); | |
00db8189 AF |
1437 | if (val < 0) |
1438 | return val; | |
1439 | ||
1440 | if (val & ESTATUS_1000_TFULL) | |
1441 | features |= SUPPORTED_1000baseT_Full; | |
1442 | if (val & ESTATUS_1000_THALF) | |
1443 | features |= SUPPORTED_1000baseT_Half; | |
1444 | } | |
1445 | ||
c242a472 SH |
1446 | phydev->supported &= features; |
1447 | phydev->advertising &= features; | |
00db8189 AF |
1448 | |
1449 | return 0; | |
1450 | } | |
124059fd | 1451 | |
9df81dd7 FF |
1452 | static int gen10g_soft_reset(struct phy_device *phydev) |
1453 | { | |
1454 | /* Do nothing for now */ | |
1455 | return 0; | |
1456 | } | |
af6b6967 | 1457 | EXPORT_SYMBOL(genphy_config_init); |
9df81dd7 | 1458 | |
124059fd AF |
1459 | static int gen10g_config_init(struct phy_device *phydev) |
1460 | { | |
1461 | /* Temporarily just say we support everything */ | |
1462 | phydev->supported = SUPPORTED_10000baseT_Full; | |
1463 | phydev->advertising = SUPPORTED_10000baseT_Full; | |
1464 | ||
1465 | return 0; | |
1466 | } | |
1467 | ||
0f0ca340 GC |
1468 | int genphy_suspend(struct phy_device *phydev) |
1469 | { | |
1470 | int value; | |
1471 | ||
1472 | mutex_lock(&phydev->lock); | |
1473 | ||
1474 | value = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1475 | phy_write(phydev, MII_BMCR, value | BMCR_PDOWN); |
0f0ca340 GC |
1476 | |
1477 | mutex_unlock(&phydev->lock); | |
1478 | ||
1479 | return 0; | |
1480 | } | |
1481 | EXPORT_SYMBOL(genphy_suspend); | |
00db8189 | 1482 | |
395056ed | 1483 | static int gen10g_suspend(struct phy_device *phydev) |
124059fd AF |
1484 | { |
1485 | return 0; | |
1486 | } | |
124059fd | 1487 | |
0f0ca340 GC |
1488 | int genphy_resume(struct phy_device *phydev) |
1489 | { | |
1490 | int value; | |
1491 | ||
1492 | mutex_lock(&phydev->lock); | |
1493 | ||
1494 | value = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1495 | phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN); |
0f0ca340 GC |
1496 | |
1497 | mutex_unlock(&phydev->lock); | |
1498 | ||
1499 | return 0; | |
1500 | } | |
1501 | EXPORT_SYMBOL(genphy_resume); | |
00db8189 | 1502 | |
395056ed | 1503 | static int gen10g_resume(struct phy_device *phydev) |
124059fd AF |
1504 | { |
1505 | return 0; | |
1506 | } | |
124059fd | 1507 | |
f3a6bd39 SH |
1508 | static int __set_phy_supported(struct phy_device *phydev, u32 max_speed) |
1509 | { | |
1510 | /* The default values for phydev->supported are provided by the PHY | |
1511 | * driver "features" member, we want to reset to sane defaults first | |
1512 | * before supporting higher speeds. | |
1513 | */ | |
1514 | phydev->supported &= PHY_DEFAULT_FEATURES; | |
1515 | ||
1516 | switch (max_speed) { | |
1517 | default: | |
1518 | return -ENOTSUPP; | |
1519 | case SPEED_1000: | |
1520 | phydev->supported |= PHY_1000BT_FEATURES; | |
1521 | /* fall through */ | |
1522 | case SPEED_100: | |
1523 | phydev->supported |= PHY_100BT_FEATURES; | |
1524 | /* fall through */ | |
1525 | case SPEED_10: | |
1526 | phydev->supported |= PHY_10BT_FEATURES; | |
1527 | } | |
1528 | ||
1529 | return 0; | |
1530 | } | |
1531 | ||
1532 | int phy_set_max_speed(struct phy_device *phydev, u32 max_speed) | |
1533 | { | |
1534 | int err; | |
1535 | ||
1536 | err = __set_phy_supported(phydev, max_speed); | |
1537 | if (err) | |
1538 | return err; | |
1539 | ||
1540 | phydev->advertising = phydev->supported; | |
1541 | ||
1542 | return 0; | |
1543 | } | |
1544 | EXPORT_SYMBOL(phy_set_max_speed); | |
1545 | ||
de906af1 SH |
1546 | static void of_set_phy_supported(struct phy_device *phydev) |
1547 | { | |
e5a03bfd | 1548 | struct device_node *node = phydev->mdio.dev.of_node; |
de906af1 SH |
1549 | u32 max_speed; |
1550 | ||
1551 | if (!IS_ENABLED(CONFIG_OF_MDIO)) | |
1552 | return; | |
1553 | ||
1554 | if (!node) | |
1555 | return; | |
1556 | ||
f3a6bd39 SH |
1557 | if (!of_property_read_u32(node, "max-speed", &max_speed)) |
1558 | __set_phy_supported(phydev, max_speed); | |
de906af1 SH |
1559 | } |
1560 | ||
b3df0da8 RD |
1561 | /** |
1562 | * phy_probe - probe and init a PHY device | |
1563 | * @dev: device to probe and init | |
00db8189 | 1564 | * |
b3df0da8 | 1565 | * Description: Take care of setting up the phy_device structure, |
00db8189 AF |
1566 | * set the state to READY (the driver's init function should |
1567 | * set it to STARTING if needed). | |
1568 | */ | |
1569 | static int phy_probe(struct device *dev) | |
1570 | { | |
553fe92b | 1571 | struct phy_device *phydev = to_phy_device(dev); |
e5a03bfd | 1572 | struct device_driver *drv = phydev->mdio.dev.driver; |
553fe92b | 1573 | struct phy_driver *phydrv = to_phy_driver(drv); |
00db8189 AF |
1574 | int err = 0; |
1575 | ||
00db8189 AF |
1576 | phydev->drv = phydrv; |
1577 | ||
2c7b4921 FF |
1578 | /* Disable the interrupt if the PHY doesn't support it |
1579 | * but the interrupt is still a valid one | |
1580 | */ | |
1581 | if (!(phydrv->flags & PHY_HAS_INTERRUPT) && | |
2f53e904 | 1582 | phy_interrupt_is_valid(phydev)) |
00db8189 AF |
1583 | phydev->irq = PHY_POLL; |
1584 | ||
4284b6a5 FF |
1585 | if (phydrv->flags & PHY_IS_INTERNAL) |
1586 | phydev->is_internal = true; | |
1587 | ||
35b5f6b1 | 1588 | mutex_lock(&phydev->lock); |
00db8189 AF |
1589 | |
1590 | /* Start out supporting everything. Eventually, | |
1591 | * a controller will attach, and may modify one | |
2f53e904 SS |
1592 | * or both of these values |
1593 | */ | |
00db8189 | 1594 | phydev->supported = phydrv->features; |
de906af1 SH |
1595 | of_set_phy_supported(phydev); |
1596 | phydev->advertising = phydev->supported; | |
00db8189 AF |
1597 | |
1598 | /* Set the state to READY by default */ | |
1599 | phydev->state = PHY_READY; | |
1600 | ||
1601 | if (phydev->drv->probe) | |
1602 | err = phydev->drv->probe(phydev); | |
1603 | ||
35b5f6b1 | 1604 | mutex_unlock(&phydev->lock); |
00db8189 | 1605 | |
00db8189 AF |
1606 | return err; |
1607 | } | |
1608 | ||
1609 | static int phy_remove(struct device *dev) | |
1610 | { | |
553fe92b | 1611 | struct phy_device *phydev = to_phy_device(dev); |
00db8189 | 1612 | |
35b5f6b1 | 1613 | mutex_lock(&phydev->lock); |
00db8189 | 1614 | phydev->state = PHY_DOWN; |
35b5f6b1 | 1615 | mutex_unlock(&phydev->lock); |
00db8189 AF |
1616 | |
1617 | if (phydev->drv->remove) | |
1618 | phydev->drv->remove(phydev); | |
00db8189 AF |
1619 | phydev->drv = NULL; |
1620 | ||
1621 | return 0; | |
1622 | } | |
1623 | ||
b3df0da8 RD |
1624 | /** |
1625 | * phy_driver_register - register a phy_driver with the PHY layer | |
1626 | * @new_driver: new phy_driver to register | |
be01da72 | 1627 | * @owner: module owning this PHY |
b3df0da8 | 1628 | */ |
be01da72 | 1629 | int phy_driver_register(struct phy_driver *new_driver, struct module *owner) |
00db8189 AF |
1630 | { |
1631 | int retval; | |
1632 | ||
a9049e0c AL |
1633 | new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY; |
1634 | new_driver->mdiodrv.driver.name = new_driver->name; | |
1635 | new_driver->mdiodrv.driver.bus = &mdio_bus_type; | |
1636 | new_driver->mdiodrv.driver.probe = phy_probe; | |
1637 | new_driver->mdiodrv.driver.remove = phy_remove; | |
1638 | new_driver->mdiodrv.driver.owner = owner; | |
00db8189 | 1639 | |
a9049e0c | 1640 | retval = driver_register(&new_driver->mdiodrv.driver); |
00db8189 | 1641 | if (retval) { |
8d242488 JP |
1642 | pr_err("%s: Error %d in registering driver\n", |
1643 | new_driver->name, retval); | |
00db8189 AF |
1644 | |
1645 | return retval; | |
1646 | } | |
1647 | ||
f2511f13 | 1648 | pr_debug("%s: Registered new driver\n", new_driver->name); |
00db8189 AF |
1649 | |
1650 | return 0; | |
1651 | } | |
1652 | EXPORT_SYMBOL(phy_driver_register); | |
1653 | ||
be01da72 AL |
1654 | int phy_drivers_register(struct phy_driver *new_driver, int n, |
1655 | struct module *owner) | |
d5bf9071 CH |
1656 | { |
1657 | int i, ret = 0; | |
1658 | ||
1659 | for (i = 0; i < n; i++) { | |
be01da72 | 1660 | ret = phy_driver_register(new_driver + i, owner); |
d5bf9071 CH |
1661 | if (ret) { |
1662 | while (i-- > 0) | |
1663 | phy_driver_unregister(new_driver + i); | |
1664 | break; | |
1665 | } | |
1666 | } | |
1667 | return ret; | |
1668 | } | |
1669 | EXPORT_SYMBOL(phy_drivers_register); | |
1670 | ||
00db8189 AF |
1671 | void phy_driver_unregister(struct phy_driver *drv) |
1672 | { | |
a9049e0c | 1673 | driver_unregister(&drv->mdiodrv.driver); |
00db8189 AF |
1674 | } |
1675 | EXPORT_SYMBOL(phy_driver_unregister); | |
1676 | ||
d5bf9071 CH |
1677 | void phy_drivers_unregister(struct phy_driver *drv, int n) |
1678 | { | |
1679 | int i; | |
2f53e904 SS |
1680 | |
1681 | for (i = 0; i < n; i++) | |
d5bf9071 | 1682 | phy_driver_unregister(drv + i); |
d5bf9071 CH |
1683 | } |
1684 | EXPORT_SYMBOL(phy_drivers_unregister); | |
1685 | ||
ab2145ed SX |
1686 | static struct phy_driver genphy_driver[] = { |
1687 | { | |
e1393456 AF |
1688 | .phy_id = 0xffffffff, |
1689 | .phy_id_mask = 0xffffffff, | |
1690 | .name = "Generic PHY", | |
9df81dd7 | 1691 | .soft_reset = genphy_soft_reset, |
e1393456 | 1692 | .config_init = genphy_config_init, |
c242a472 SH |
1693 | .features = PHY_GBIT_FEATURES | SUPPORTED_MII | |
1694 | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
1695 | SUPPORTED_BNC, | |
e1393456 | 1696 | .config_aneg = genphy_config_aneg, |
76a423a3 | 1697 | .aneg_done = genphy_aneg_done, |
e1393456 | 1698 | .read_status = genphy_read_status, |
0f0ca340 GC |
1699 | .suspend = genphy_suspend, |
1700 | .resume = genphy_resume, | |
124059fd AF |
1701 | }, { |
1702 | .phy_id = 0xffffffff, | |
1703 | .phy_id_mask = 0xffffffff, | |
1704 | .name = "Generic 10G PHY", | |
9df81dd7 | 1705 | .soft_reset = gen10g_soft_reset, |
124059fd AF |
1706 | .config_init = gen10g_config_init, |
1707 | .features = 0, | |
1708 | .config_aneg = gen10g_config_aneg, | |
1709 | .read_status = gen10g_read_status, | |
1710 | .suspend = gen10g_suspend, | |
1711 | .resume = gen10g_resume, | |
ab2145ed | 1712 | } }; |
00db8189 | 1713 | |
67c4f3fa | 1714 | static int __init phy_init(void) |
00db8189 | 1715 | { |
67c4f3fa | 1716 | int rc; |
67c4f3fa JG |
1717 | |
1718 | rc = mdio_bus_init(); | |
1719 | if (rc) | |
e1393456 | 1720 | return rc; |
00db8189 | 1721 | |
ab2145ed | 1722 | rc = phy_drivers_register(genphy_driver, |
be01da72 | 1723 | ARRAY_SIZE(genphy_driver), THIS_MODULE); |
e1393456 AF |
1724 | if (rc) |
1725 | mdio_bus_exit(); | |
67c4f3fa | 1726 | |
67c4f3fa | 1727 | return rc; |
00db8189 AF |
1728 | } |
1729 | ||
67c4f3fa | 1730 | static void __exit phy_exit(void) |
00db8189 | 1731 | { |
ab2145ed SX |
1732 | phy_drivers_unregister(genphy_driver, |
1733 | ARRAY_SIZE(genphy_driver)); | |
e1393456 | 1734 | mdio_bus_exit(); |
00db8189 AF |
1735 | } |
1736 | ||
e1393456 | 1737 | subsys_initcall(phy_init); |
67c4f3fa | 1738 | module_exit(phy_exit); |