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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 | { | |
b2a43191 | 46 | put_device(&phydev->dev); |
6f4a7f41 | 47 | } |
4dea547f | 48 | EXPORT_SYMBOL(phy_device_free); |
6f4a7f41 AV |
49 | |
50 | static void phy_device_release(struct device *dev) | |
51 | { | |
b2a43191 | 52 | kfree(to_phy_device(dev)); |
6f4a7f41 AV |
53 | } |
54 | ||
ab2145ed SX |
55 | enum genphy_driver { |
56 | GENPHY_DRV_1G, | |
124059fd | 57 | GENPHY_DRV_10G, |
ab2145ed SX |
58 | GENPHY_DRV_MAX |
59 | }; | |
60 | ||
61 | static struct phy_driver genphy_driver[GENPHY_DRV_MAX]; | |
4dea547f | 62 | |
f62220d3 AF |
63 | static LIST_HEAD(phy_fixup_list); |
64 | static DEFINE_MUTEX(phy_fixup_lock); | |
65 | ||
2f53e904 SS |
66 | /** |
67 | * phy_register_fixup - creates a new phy_fixup and adds it to the list | |
f62220d3 AF |
68 | * @bus_id: A string which matches phydev->dev.bus_id (or PHY_ANY_ID) |
69 | * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) | |
2f53e904 | 70 | * It can also be PHY_ANY_UID |
f62220d3 | 71 | * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before |
2f53e904 | 72 | * comparison |
f62220d3 AF |
73 | * @run: The actual code to be run when a matching PHY is found |
74 | */ | |
75 | int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, | |
2f53e904 | 76 | int (*run)(struct phy_device *)) |
f62220d3 | 77 | { |
553fe92b | 78 | struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); |
f62220d3 | 79 | |
f62220d3 AF |
80 | if (!fixup) |
81 | return -ENOMEM; | |
82 | ||
fb28ad35 | 83 | strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); |
f62220d3 AF |
84 | fixup->phy_uid = phy_uid; |
85 | fixup->phy_uid_mask = phy_uid_mask; | |
86 | fixup->run = run; | |
87 | ||
88 | mutex_lock(&phy_fixup_lock); | |
89 | list_add_tail(&fixup->list, &phy_fixup_list); | |
90 | mutex_unlock(&phy_fixup_lock); | |
91 | ||
92 | return 0; | |
93 | } | |
94 | EXPORT_SYMBOL(phy_register_fixup); | |
95 | ||
96 | /* Registers a fixup to be run on any PHY with the UID in phy_uid */ | |
97 | int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, | |
2f53e904 | 98 | int (*run)(struct phy_device *)) |
f62220d3 AF |
99 | { |
100 | return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); | |
101 | } | |
102 | EXPORT_SYMBOL(phy_register_fixup_for_uid); | |
103 | ||
104 | /* Registers a fixup to be run on the PHY with id string bus_id */ | |
105 | int phy_register_fixup_for_id(const char *bus_id, | |
2f53e904 | 106 | int (*run)(struct phy_device *)) |
f62220d3 AF |
107 | { |
108 | return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); | |
109 | } | |
110 | EXPORT_SYMBOL(phy_register_fixup_for_id); | |
111 | ||
2f53e904 | 112 | /* Returns 1 if fixup matches phydev in bus_id and phy_uid. |
f62220d3 AF |
113 | * Fixups can be set to match any in one or more fields. |
114 | */ | |
115 | static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) | |
116 | { | |
84eff6d1 | 117 | if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0) |
f62220d3 AF |
118 | if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) |
119 | return 0; | |
120 | ||
121 | if ((fixup->phy_uid & fixup->phy_uid_mask) != | |
2f53e904 | 122 | (phydev->phy_id & fixup->phy_uid_mask)) |
f62220d3 AF |
123 | if (fixup->phy_uid != PHY_ANY_UID) |
124 | return 0; | |
125 | ||
126 | return 1; | |
127 | } | |
128 | ||
129 | /* Runs any matching fixups for this phydev */ | |
fbfcec63 | 130 | static int phy_scan_fixups(struct phy_device *phydev) |
f62220d3 AF |
131 | { |
132 | struct phy_fixup *fixup; | |
133 | ||
134 | mutex_lock(&phy_fixup_lock); | |
135 | list_for_each_entry(fixup, &phy_fixup_list, list) { | |
136 | if (phy_needs_fixup(phydev, fixup)) { | |
553fe92b | 137 | int err = fixup->run(phydev); |
f62220d3 | 138 | |
bc23283c JS |
139 | if (err < 0) { |
140 | mutex_unlock(&phy_fixup_lock); | |
f62220d3 | 141 | return err; |
bc23283c | 142 | } |
b0ae009f | 143 | phydev->has_fixups = true; |
f62220d3 AF |
144 | } |
145 | } | |
146 | mutex_unlock(&phy_fixup_lock); | |
147 | ||
148 | return 0; | |
149 | } | |
f62220d3 | 150 | |
ac28b9f8 | 151 | struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id, |
2f53e904 SS |
152 | bool is_c45, |
153 | struct phy_c45_device_ids *c45_ids) | |
11b0bacd VB |
154 | { |
155 | struct phy_device *dev; | |
8626d3b4 | 156 | |
2f53e904 | 157 | /* We allocate the device, and initialize the default values */ |
cd861280 | 158 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
ef899c07 | 159 | if (!dev) |
d3765f08 | 160 | return ERR_PTR(-ENOMEM); |
11b0bacd | 161 | |
6f4a7f41 AV |
162 | dev->dev.release = phy_device_release; |
163 | ||
11b0bacd VB |
164 | dev->speed = 0; |
165 | dev->duplex = -1; | |
2f53e904 SS |
166 | dev->pause = 0; |
167 | dev->asym_pause = 0; | |
11b0bacd | 168 | dev->link = 1; |
e8a2b6a4 | 169 | dev->interface = PHY_INTERFACE_MODE_GMII; |
11b0bacd VB |
170 | |
171 | dev->autoneg = AUTONEG_ENABLE; | |
172 | ||
ac28b9f8 | 173 | dev->is_c45 = is_c45; |
11b0bacd VB |
174 | dev->addr = addr; |
175 | dev->phy_id = phy_id; | |
ac28b9f8 DD |
176 | if (c45_ids) |
177 | dev->c45_ids = *c45_ids; | |
11b0bacd | 178 | dev->bus = bus; |
8b63ec18 | 179 | dev->dev.parent = &bus->dev; |
4dea547f | 180 | dev->dev.bus = &mdio_bus_type; |
ef899c07 | 181 | dev->irq = bus->irq ? bus->irq[addr] : PHY_POLL; |
4dea547f | 182 | dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr); |
11b0bacd VB |
183 | |
184 | dev->state = PHY_DOWN; | |
185 | ||
35b5f6b1 | 186 | mutex_init(&dev->lock); |
4f9c85a1 | 187 | INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); |
5ea94e76 | 188 | INIT_WORK(&dev->phy_queue, phy_change); |
11b0bacd | 189 | |
8626d3b4 | 190 | /* Request the appropriate module unconditionally; don't |
2f53e904 SS |
191 | * bother trying to do so only if it isn't already loaded, |
192 | * because that gets complicated. A hotplug event would have | |
193 | * done an unconditional modprobe anyway. | |
194 | * We don't do normal hotplug because it won't work for MDIO | |
195 | * -- because it relies on the device staying around for long | |
196 | * enough for the driver to get loaded. With MDIO, the NIC | |
197 | * driver will get bored and give up as soon as it finds that | |
198 | * there's no driver _already_ loaded. | |
199 | */ | |
8626d3b4 DW |
200 | request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id)); |
201 | ||
b2a43191 PM |
202 | device_initialize(&dev->dev); |
203 | ||
11b0bacd VB |
204 | return dev; |
205 | } | |
ac28b9f8 DD |
206 | EXPORT_SYMBOL(phy_device_create); |
207 | ||
5f6c99e0 SX |
208 | /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers. |
209 | * @bus: the target MII bus | |
210 | * @addr: PHY address on the MII bus | |
211 | * @dev_addr: MMD address in the PHY. | |
212 | * @devices_in_package: where to store the devices in package information. | |
213 | * | |
214 | * Description: reads devices in package registers of a MMD at @dev_addr | |
215 | * from PHY at @addr on @bus. | |
216 | * | |
217 | * Returns: 0 on success, -EIO on failure. | |
218 | */ | |
219 | static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr, | |
220 | u32 *devices_in_package) | |
221 | { | |
222 | int phy_reg, reg_addr; | |
223 | ||
224 | reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2; | |
225 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
226 | if (phy_reg < 0) | |
227 | return -EIO; | |
228 | *devices_in_package = (phy_reg & 0xffff) << 16; | |
229 | ||
230 | reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1; | |
231 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
232 | if (phy_reg < 0) | |
233 | return -EIO; | |
234 | *devices_in_package |= (phy_reg & 0xffff); | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
ac28b9f8 DD |
239 | /** |
240 | * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. | |
241 | * @bus: the target MII bus | |
242 | * @addr: PHY address on the MII bus | |
243 | * @phy_id: where to store the ID retrieved. | |
244 | * @c45_ids: where to store the c45 ID information. | |
245 | * | |
246 | * If the PHY devices-in-package appears to be valid, it and the | |
247 | * corresponding identifiers are stored in @c45_ids, zero is stored | |
248 | * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns | |
249 | * zero on success. | |
250 | * | |
251 | */ | |
252 | static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id, | |
253 | struct phy_c45_device_ids *c45_ids) { | |
254 | int phy_reg; | |
255 | int i, reg_addr; | |
256 | const int num_ids = ARRAY_SIZE(c45_ids->device_ids); | |
5f6c99e0 | 257 | u32 *devs = &c45_ids->devices_in_package; |
ac28b9f8 | 258 | |
5f6c99e0 SX |
259 | /* Find first non-zero Devices In package. Device zero is reserved |
260 | * for 802.3 c45 complied PHYs, so don't probe it at first. | |
ac28b9f8 | 261 | */ |
5f6c99e0 SX |
262 | for (i = 1; i < num_ids && *devs == 0; i++) { |
263 | phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs); | |
ac28b9f8 DD |
264 | if (phy_reg < 0) |
265 | return -EIO; | |
ac28b9f8 | 266 | |
5f6c99e0 SX |
267 | if ((*devs & 0x1fffffff) == 0x1fffffff) { |
268 | /* If mostly Fs, there is no device there, | |
269 | * then let's continue to probe more, as some | |
270 | * 10G PHYs have zero Devices In package, | |
271 | * e.g. Cortina CS4315/CS4340 PHY. | |
272 | */ | |
273 | phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs); | |
274 | if (phy_reg < 0) | |
275 | return -EIO; | |
276 | /* no device there, let's get out of here */ | |
277 | if ((*devs & 0x1fffffff) == 0x1fffffff) { | |
da1da284 SL |
278 | *phy_id = 0xffffffff; |
279 | return 0; | |
5f6c99e0 SX |
280 | } else { |
281 | break; | |
da1da284 | 282 | } |
ac28b9f8 DD |
283 | } |
284 | } | |
285 | ||
286 | /* Now probe Device Identifiers for each device present. */ | |
287 | for (i = 1; i < num_ids; i++) { | |
288 | if (!(c45_ids->devices_in_package & (1 << i))) | |
289 | continue; | |
290 | ||
291 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1; | |
292 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
293 | if (phy_reg < 0) | |
294 | return -EIO; | |
295 | c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16; | |
296 | ||
297 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2; | |
298 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
299 | if (phy_reg < 0) | |
300 | return -EIO; | |
301 | c45_ids->device_ids[i] |= (phy_reg & 0xffff); | |
302 | } | |
303 | *phy_id = 0; | |
304 | return 0; | |
305 | } | |
11b0bacd | 306 | |
b3df0da8 | 307 | /** |
cac1f3c8 | 308 | * get_phy_id - reads the specified addr for its ID. |
b3df0da8 RD |
309 | * @bus: the target MII bus |
310 | * @addr: PHY address on the MII bus | |
cac1f3c8 | 311 | * @phy_id: where to store the ID retrieved. |
ac28b9f8 DD |
312 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
313 | * @c45_ids: where to store the c45 ID information. | |
314 | * | |
315 | * Description: In the case of a 802.3-c22 PHY, reads the ID registers | |
316 | * of the PHY at @addr on the @bus, stores it in @phy_id and returns | |
317 | * zero on success. | |
318 | * | |
319 | * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and | |
320 | * its return value is in turn returned. | |
00db8189 | 321 | * |
00db8189 | 322 | */ |
ac28b9f8 DD |
323 | static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id, |
324 | bool is_c45, struct phy_c45_device_ids *c45_ids) | |
00db8189 AF |
325 | { |
326 | int phy_reg; | |
00db8189 | 327 | |
ac28b9f8 DD |
328 | if (is_c45) |
329 | return get_phy_c45_ids(bus, addr, phy_id, c45_ids); | |
330 | ||
2f53e904 | 331 | /* Grab the bits from PHYIR1, and put them in the upper half */ |
6fe32649 | 332 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); |
00db8189 | 333 | if (phy_reg < 0) |
cac1f3c8 | 334 | return -EIO; |
00db8189 | 335 | |
cac1f3c8 | 336 | *phy_id = (phy_reg & 0xffff) << 16; |
00db8189 AF |
337 | |
338 | /* Grab the bits from PHYIR2, and put them in the lower half */ | |
6fe32649 | 339 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); |
00db8189 | 340 | if (phy_reg < 0) |
cac1f3c8 PG |
341 | return -EIO; |
342 | ||
343 | *phy_id |= (phy_reg & 0xffff); | |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
348 | /** | |
2f53e904 SS |
349 | * get_phy_device - reads the specified PHY device and returns its @phy_device |
350 | * struct | |
cac1f3c8 PG |
351 | * @bus: the target MII bus |
352 | * @addr: PHY address on the MII bus | |
ac28b9f8 | 353 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
cac1f3c8 PG |
354 | * |
355 | * Description: Reads the ID registers of the PHY at @addr on the | |
356 | * @bus, then allocates and returns the phy_device to represent it. | |
357 | */ | |
ac28b9f8 | 358 | struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) |
cac1f3c8 | 359 | { |
ac28b9f8 | 360 | struct phy_c45_device_ids c45_ids = {0}; |
160c85f0 | 361 | u32 phy_id = 0; |
cac1f3c8 | 362 | int r; |
00db8189 | 363 | |
ac28b9f8 | 364 | r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids); |
cac1f3c8 PG |
365 | if (r) |
366 | return ERR_PTR(r); | |
00db8189 | 367 | |
6436cbcd GC |
368 | /* If the phy_id is mostly Fs, there is no device there */ |
369 | if ((phy_id & 0x1fffffff) == 0x1fffffff) | |
370 | return NULL; | |
371 | ||
e62a768f | 372 | return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); |
00db8189 | 373 | } |
4dea547f GL |
374 | EXPORT_SYMBOL(get_phy_device); |
375 | ||
376 | /** | |
377 | * phy_device_register - Register the phy device on the MDIO bus | |
1d4ac5d5 | 378 | * @phydev: phy_device structure to be added to the MDIO bus |
4dea547f GL |
379 | */ |
380 | int phy_device_register(struct phy_device *phydev) | |
381 | { | |
382 | int err; | |
383 | ||
2f53e904 | 384 | /* Don't register a phy if one is already registered at this address */ |
4dea547f GL |
385 | if (phydev->bus->phy_map[phydev->addr]) |
386 | return -EINVAL; | |
387 | phydev->bus->phy_map[phydev->addr] = phydev; | |
388 | ||
389 | /* Run all of the fixups for this PHY */ | |
d92f5dec | 390 | err = phy_scan_fixups(phydev); |
87aa9f9c FF |
391 | if (err) { |
392 | pr_err("PHY %d failed to initialize\n", phydev->addr); | |
393 | goto out; | |
394 | } | |
4dea547f | 395 | |
b2a43191 | 396 | err = device_add(&phydev->dev); |
4dea547f | 397 | if (err) { |
b2a43191 | 398 | pr_err("PHY %d failed to add\n", phydev->addr); |
4dea547f GL |
399 | goto out; |
400 | } | |
401 | ||
402 | return 0; | |
403 | ||
404 | out: | |
405 | phydev->bus->phy_map[phydev->addr] = NULL; | |
406 | return err; | |
407 | } | |
408 | EXPORT_SYMBOL(phy_device_register); | |
00db8189 | 409 | |
38737e49 RK |
410 | /** |
411 | * phy_device_remove - Remove a previously registered phy device from the MDIO bus | |
412 | * @phydev: phy_device structure to remove | |
413 | * | |
414 | * This doesn't free the phy_device itself, it merely reverses the effects | |
415 | * of phy_device_register(). Use phy_device_free() to free the device | |
416 | * after calling this function. | |
417 | */ | |
418 | void phy_device_remove(struct phy_device *phydev) | |
419 | { | |
420 | struct mii_bus *bus = phydev->bus; | |
421 | int addr = phydev->addr; | |
422 | ||
423 | device_del(&phydev->dev); | |
424 | bus->phy_map[addr] = NULL; | |
425 | } | |
426 | EXPORT_SYMBOL(phy_device_remove); | |
427 | ||
f8f76db1 JP |
428 | /** |
429 | * phy_find_first - finds the first PHY device on the bus | |
430 | * @bus: the target MII bus | |
431 | */ | |
432 | struct phy_device *phy_find_first(struct mii_bus *bus) | |
433 | { | |
434 | int addr; | |
435 | ||
436 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { | |
437 | if (bus->phy_map[addr]) | |
438 | return bus->phy_map[addr]; | |
439 | } | |
440 | return NULL; | |
441 | } | |
442 | EXPORT_SYMBOL(phy_find_first); | |
443 | ||
b3df0da8 RD |
444 | /** |
445 | * phy_prepare_link - prepares the PHY layer to monitor link status | |
446 | * @phydev: target phy_device struct | |
447 | * @handler: callback function for link status change notifications | |
00db8189 | 448 | * |
b3df0da8 | 449 | * Description: Tells the PHY infrastructure to handle the |
00db8189 AF |
450 | * gory details on monitoring link status (whether through |
451 | * polling or an interrupt), and to call back to the | |
452 | * connected device driver when the link status changes. | |
453 | * If you want to monitor your own link state, don't call | |
b3df0da8 RD |
454 | * this function. |
455 | */ | |
89ff05ec | 456 | static void phy_prepare_link(struct phy_device *phydev, |
2f53e904 | 457 | void (*handler)(struct net_device *)) |
00db8189 AF |
458 | { |
459 | phydev->adjust_link = handler; | |
460 | } | |
461 | ||
fa94f6d9 GL |
462 | /** |
463 | * phy_connect_direct - connect an ethernet device to a specific phy_device | |
464 | * @dev: the network device to connect | |
465 | * @phydev: the pointer to the phy device | |
466 | * @handler: callback function for state change notifications | |
fa94f6d9 GL |
467 | * @interface: PHY device's interface |
468 | */ | |
469 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, | |
f9a8f83b | 470 | void (*handler)(struct net_device *), |
fa94f6d9 GL |
471 | phy_interface_t interface) |
472 | { | |
473 | int rc; | |
474 | ||
f9a8f83b | 475 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
fa94f6d9 GL |
476 | if (rc) |
477 | return rc; | |
478 | ||
479 | phy_prepare_link(phydev, handler); | |
29935aeb | 480 | phy_start_machine(phydev); |
fa94f6d9 GL |
481 | if (phydev->irq > 0) |
482 | phy_start_interrupts(phydev); | |
483 | ||
484 | return 0; | |
485 | } | |
486 | EXPORT_SYMBOL(phy_connect_direct); | |
487 | ||
b3df0da8 RD |
488 | /** |
489 | * phy_connect - connect an ethernet device to a PHY device | |
490 | * @dev: the network device to connect | |
5d12b132 | 491 | * @bus_id: the id string of the PHY device to connect |
b3df0da8 | 492 | * @handler: callback function for state change notifications |
b3df0da8 | 493 | * @interface: PHY device's interface |
e1393456 | 494 | * |
b3df0da8 | 495 | * Description: Convenience function for connecting ethernet |
e1393456 AF |
496 | * devices to PHY devices. The default behavior is for |
497 | * the PHY infrastructure to handle everything, and only notify | |
498 | * the connected driver when the link status changes. If you | |
499 | * don't want, or can't use the provided functionality, you may | |
500 | * choose to call only the subset of functions which provide | |
501 | * the desired functionality. | |
502 | */ | |
e109374f | 503 | struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, |
2f53e904 SS |
504 | void (*handler)(struct net_device *), |
505 | phy_interface_t interface) | |
e1393456 AF |
506 | { |
507 | struct phy_device *phydev; | |
fa94f6d9 GL |
508 | struct device *d; |
509 | int rc; | |
e1393456 | 510 | |
fa94f6d9 | 511 | /* Search the list of PHY devices on the mdio bus for the |
2f53e904 SS |
512 | * PHY with the requested name |
513 | */ | |
fa94f6d9 GL |
514 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); |
515 | if (!d) { | |
516 | pr_err("PHY %s not found\n", bus_id); | |
517 | return ERR_PTR(-ENODEV); | |
518 | } | |
519 | phydev = to_phy_device(d); | |
e1393456 | 520 | |
f9a8f83b | 521 | rc = phy_connect_direct(dev, phydev, handler, interface); |
fa94f6d9 GL |
522 | if (rc) |
523 | return ERR_PTR(rc); | |
e1393456 AF |
524 | |
525 | return phydev; | |
526 | } | |
527 | EXPORT_SYMBOL(phy_connect); | |
528 | ||
b3df0da8 | 529 | /** |
2f53e904 SS |
530 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY |
531 | * device | |
b3df0da8 RD |
532 | * @phydev: target phy_device struct |
533 | */ | |
e1393456 AF |
534 | void phy_disconnect(struct phy_device *phydev) |
535 | { | |
536 | if (phydev->irq > 0) | |
537 | phy_stop_interrupts(phydev); | |
538 | ||
539 | phy_stop_machine(phydev); | |
e109374f | 540 | |
e1393456 AF |
541 | phydev->adjust_link = NULL; |
542 | ||
543 | phy_detach(phydev); | |
544 | } | |
545 | EXPORT_SYMBOL(phy_disconnect); | |
546 | ||
87aa9f9c FF |
547 | /** |
548 | * phy_poll_reset - Safely wait until a PHY reset has properly completed | |
549 | * @phydev: The PHY device to poll | |
550 | * | |
551 | * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as | |
552 | * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR | |
553 | * register must be polled until the BMCR_RESET bit clears. | |
554 | * | |
555 | * Furthermore, any attempts to write to PHY registers may have no effect | |
556 | * or even generate MDIO bus errors until this is complete. | |
557 | * | |
558 | * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the | |
559 | * standard and do not fully reset after the BMCR_RESET bit is set, and may | |
560 | * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an | |
561 | * effort to support such broken PHYs, this function is separate from the | |
562 | * standard phy_init_hw() which will zero all the other bits in the BMCR | |
563 | * and reapply all driver-specific and board-specific fixups. | |
564 | */ | |
565 | static int phy_poll_reset(struct phy_device *phydev) | |
566 | { | |
567 | /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ | |
568 | unsigned int retries = 12; | |
569 | int ret; | |
570 | ||
571 | do { | |
572 | msleep(50); | |
573 | ret = phy_read(phydev, MII_BMCR); | |
574 | if (ret < 0) | |
575 | return ret; | |
576 | } while (ret & BMCR_RESET && --retries); | |
577 | if (ret & BMCR_RESET) | |
578 | return -ETIMEDOUT; | |
579 | ||
2f53e904 | 580 | /* Some chips (smsc911x) may still need up to another 1ms after the |
87aa9f9c FF |
581 | * BMCR_RESET bit is cleared before they are usable. |
582 | */ | |
583 | msleep(1); | |
584 | return 0; | |
585 | } | |
586 | ||
2f5cb434 AV |
587 | int phy_init_hw(struct phy_device *phydev) |
588 | { | |
9df81dd7 | 589 | int ret = 0; |
2f5cb434 AV |
590 | |
591 | if (!phydev->drv || !phydev->drv->config_init) | |
592 | return 0; | |
593 | ||
9df81dd7 FF |
594 | if (phydev->drv->soft_reset) |
595 | ret = phydev->drv->soft_reset(phydev); | |
596 | else | |
597 | ret = genphy_soft_reset(phydev); | |
598 | ||
87aa9f9c FF |
599 | if (ret < 0) |
600 | return ret; | |
601 | ||
2f5cb434 AV |
602 | ret = phy_scan_fixups(phydev); |
603 | if (ret < 0) | |
604 | return ret; | |
605 | ||
606 | return phydev->drv->config_init(phydev); | |
607 | } | |
87aa9f9c | 608 | EXPORT_SYMBOL(phy_init_hw); |
2f5cb434 | 609 | |
2220943a AL |
610 | void phy_attached_info(struct phy_device *phydev) |
611 | { | |
612 | phy_attached_print(phydev, NULL); | |
613 | } | |
614 | EXPORT_SYMBOL(phy_attached_info); | |
615 | ||
616 | #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)" | |
617 | void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) | |
618 | { | |
619 | if (!fmt) { | |
620 | dev_info(&phydev->dev, ATTACHED_FMT "\n", | |
621 | phydev->drv->name, phydev_name(phydev), | |
622 | phydev->irq); | |
623 | } else { | |
624 | va_list ap; | |
625 | ||
626 | dev_info(&phydev->dev, ATTACHED_FMT, | |
627 | phydev->drv->name, phydev_name(phydev), | |
628 | phydev->irq); | |
629 | ||
630 | va_start(ap, fmt); | |
631 | vprintk(fmt, ap); | |
632 | va_end(ap); | |
633 | } | |
634 | } | |
635 | EXPORT_SYMBOL(phy_attached_print); | |
636 | ||
b3df0da8 | 637 | /** |
fa94f6d9 | 638 | * phy_attach_direct - attach a network device to a given PHY device pointer |
b3df0da8 | 639 | * @dev: network device to attach |
fa94f6d9 | 640 | * @phydev: Pointer to phy_device to attach |
b3df0da8 RD |
641 | * @flags: PHY device's dev_flags |
642 | * @interface: PHY device's interface | |
e1393456 | 643 | * |
b3df0da8 | 644 | * Description: Called by drivers to attach to a particular PHY |
e1393456 | 645 | * device. The phy_device is found, and properly hooked up |
257184d7 AF |
646 | * to the phy_driver. If no driver is attached, then a |
647 | * generic driver is used. The phy_device is given a ptr to | |
e1393456 | 648 | * the attaching device, and given a callback for link status |
b3df0da8 | 649 | * change. The phy_device is returned to the attaching driver. |
7322967b | 650 | * This function takes a reference on the phy device. |
e1393456 | 651 | */ |
257184d7 AF |
652 | int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
653 | u32 flags, phy_interface_t interface) | |
e1393456 | 654 | { |
3e3aaf64 | 655 | struct mii_bus *bus = phydev->bus; |
fa94f6d9 | 656 | struct device *d = &phydev->dev; |
d005a09e | 657 | int err; |
e1393456 | 658 | |
3e3aaf64 RK |
659 | if (!try_module_get(bus->owner)) { |
660 | dev_err(&dev->dev, "failed to get the bus module\n"); | |
661 | return -EIO; | |
662 | } | |
663 | ||
7322967b RK |
664 | get_device(d); |
665 | ||
e1393456 | 666 | /* Assume that if there is no driver, that it doesn't |
2f53e904 SS |
667 | * exist, and we should use the genphy driver. |
668 | */ | |
ef899c07 | 669 | if (!d->driver) { |
257184d7 AF |
670 | if (phydev->is_c45) |
671 | d->driver = &genphy_driver[GENPHY_DRV_10G].driver; | |
672 | else | |
673 | d->driver = &genphy_driver[GENPHY_DRV_1G].driver; | |
e1393456 AF |
674 | |
675 | err = d->driver->probe(d); | |
b7a00ecd JG |
676 | if (err >= 0) |
677 | err = device_bind_driver(d); | |
e1393456 | 678 | |
b7a00ecd | 679 | if (err) |
3e3aaf64 | 680 | goto error; |
e1393456 AF |
681 | } |
682 | ||
683 | if (phydev->attached_dev) { | |
fa94f6d9 | 684 | dev_err(&dev->dev, "PHY already attached\n"); |
3e3aaf64 RK |
685 | err = -EBUSY; |
686 | goto error; | |
b3565f27 EG |
687 | } |
688 | ||
e1393456 | 689 | phydev->attached_dev = dev; |
c1f19b51 | 690 | dev->phydev = phydev; |
e1393456 AF |
691 | |
692 | phydev->dev_flags = flags; | |
693 | ||
e8a2b6a4 AF |
694 | phydev->interface = interface; |
695 | ||
ef24b16b AV |
696 | phydev->state = PHY_READY; |
697 | ||
e8a2b6a4 AF |
698 | /* Do initial configuration here, now that |
699 | * we have certain key parameters | |
2f53e904 SS |
700 | * (dev_flags and interface) |
701 | */ | |
d005a09e MKB |
702 | err = phy_init_hw(phydev); |
703 | if (err) | |
704 | phy_detach(phydev); | |
b394745d GR |
705 | else |
706 | phy_resume(phydev); | |
1211ce53 | 707 | |
d005a09e | 708 | return err; |
3e3aaf64 RK |
709 | |
710 | error: | |
7322967b | 711 | put_device(d); |
3e3aaf64 RK |
712 | module_put(bus->owner); |
713 | return err; | |
fa94f6d9 | 714 | } |
257184d7 | 715 | EXPORT_SYMBOL(phy_attach_direct); |
fa94f6d9 GL |
716 | |
717 | /** | |
718 | * phy_attach - attach a network device to a particular PHY device | |
719 | * @dev: network device to attach | |
720 | * @bus_id: Bus ID of PHY device to attach | |
fa94f6d9 GL |
721 | * @interface: PHY device's interface |
722 | * | |
723 | * Description: Same as phy_attach_direct() except that a PHY bus_id | |
724 | * string is passed instead of a pointer to a struct phy_device. | |
725 | */ | |
2f53e904 SS |
726 | struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, |
727 | phy_interface_t interface) | |
fa94f6d9 GL |
728 | { |
729 | struct bus_type *bus = &mdio_bus_type; | |
730 | struct phy_device *phydev; | |
731 | struct device *d; | |
732 | int rc; | |
733 | ||
734 | /* Search the list of PHY devices on the mdio bus for the | |
2f53e904 SS |
735 | * PHY with the requested name |
736 | */ | |
fa94f6d9 GL |
737 | d = bus_find_device_by_name(bus, NULL, bus_id); |
738 | if (!d) { | |
739 | pr_err("PHY %s not found\n", bus_id); | |
740 | return ERR_PTR(-ENODEV); | |
e8a2b6a4 | 741 | } |
fa94f6d9 GL |
742 | phydev = to_phy_device(d); |
743 | ||
f9a8f83b | 744 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
fa94f6d9 GL |
745 | if (rc) |
746 | return ERR_PTR(rc); | |
e8a2b6a4 | 747 | |
e1393456 AF |
748 | return phydev; |
749 | } | |
750 | EXPORT_SYMBOL(phy_attach); | |
751 | ||
b3df0da8 RD |
752 | /** |
753 | * phy_detach - detach a PHY device from its network device | |
754 | * @phydev: target phy_device struct | |
7322967b RK |
755 | * |
756 | * This detaches the phy device from its network device and the phy | |
757 | * driver, and drops the reference count taken in phy_attach_direct(). | |
b3df0da8 | 758 | */ |
e1393456 AF |
759 | void phy_detach(struct phy_device *phydev) |
760 | { | |
3e3aaf64 | 761 | struct mii_bus *bus; |
ab2145ed | 762 | int i; |
b3565f27 | 763 | |
c1f19b51 | 764 | phydev->attached_dev->phydev = NULL; |
e1393456 | 765 | phydev->attached_dev = NULL; |
1211ce53 | 766 | phy_suspend(phydev); |
e1393456 AF |
767 | |
768 | /* If the device had no specific driver before (i.e. - it | |
769 | * was using the generic driver), we unbind the device | |
770 | * from the generic driver so that there's a chance a | |
2f53e904 SS |
771 | * real driver could be loaded |
772 | */ | |
ab2145ed SX |
773 | for (i = 0; i < ARRAY_SIZE(genphy_driver); i++) { |
774 | if (phydev->dev.driver == &genphy_driver[i].driver) { | |
775 | device_release_driver(&phydev->dev); | |
776 | break; | |
777 | } | |
778 | } | |
3e3aaf64 | 779 | |
7322967b RK |
780 | /* |
781 | * The phydev might go away on the put_device() below, so avoid | |
782 | * a use-after-free bug by reading the underlying bus first. | |
783 | */ | |
3e3aaf64 RK |
784 | bus = phydev->bus; |
785 | ||
7322967b | 786 | put_device(&phydev->dev); |
3e3aaf64 | 787 | module_put(bus->owner); |
e1393456 AF |
788 | } |
789 | EXPORT_SYMBOL(phy_detach); | |
790 | ||
481b5d93 SH |
791 | int phy_suspend(struct phy_device *phydev) |
792 | { | |
793 | struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver); | |
32fc3fd4 | 794 | struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; |
8a477a6f | 795 | int ret = 0; |
481b5d93 SH |
796 | |
797 | /* If the device has WOL enabled, we cannot suspend the PHY */ | |
481b5d93 SH |
798 | phy_ethtool_get_wol(phydev, &wol); |
799 | if (wol.wolopts) | |
800 | return -EBUSY; | |
801 | ||
802 | if (phydrv->suspend) | |
8a477a6f FF |
803 | ret = phydrv->suspend(phydev); |
804 | ||
805 | if (ret) | |
806 | return ret; | |
807 | ||
808 | phydev->suspended = true; | |
809 | ||
810 | return ret; | |
481b5d93 | 811 | } |
ca127697 | 812 | EXPORT_SYMBOL(phy_suspend); |
481b5d93 SH |
813 | |
814 | int phy_resume(struct phy_device *phydev) | |
815 | { | |
816 | struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver); | |
8a477a6f | 817 | int ret = 0; |
481b5d93 SH |
818 | |
819 | if (phydrv->resume) | |
8a477a6f FF |
820 | ret = phydrv->resume(phydev); |
821 | ||
822 | if (ret) | |
823 | return ret; | |
824 | ||
825 | phydev->suspended = false; | |
826 | ||
827 | return ret; | |
481b5d93 | 828 | } |
ca127697 | 829 | EXPORT_SYMBOL(phy_resume); |
e1393456 | 830 | |
00db8189 AF |
831 | /* Generic PHY support and helper functions */ |
832 | ||
b3df0da8 | 833 | /** |
25985edc | 834 | * genphy_config_advert - sanitize and advertise auto-negotiation parameters |
b3df0da8 | 835 | * @phydev: target phy_device struct |
00db8189 | 836 | * |
b3df0da8 | 837 | * Description: Writes MII_ADVERTISE with the appropriate values, |
00db8189 | 838 | * after sanitizing the values to make sure we only advertise |
51e2a384 TP |
839 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
840 | * hasn't changed, and > 0 if it has changed. | |
00db8189 | 841 | */ |
89ff05ec | 842 | static int genphy_config_advert(struct phy_device *phydev) |
00db8189 AF |
843 | { |
844 | u32 advertise; | |
5273e3a5 | 845 | int oldadv, adv, bmsr; |
51e2a384 | 846 | int err, changed = 0; |
00db8189 | 847 | |
2f53e904 | 848 | /* Only allow advertising what this PHY supports */ |
00db8189 AF |
849 | phydev->advertising &= phydev->supported; |
850 | advertise = phydev->advertising; | |
851 | ||
852 | /* Setup standard advertisement */ | |
2f53e904 | 853 | adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
854 | if (adv < 0) |
855 | return adv; | |
856 | ||
2f53e904 | 857 | oldadv = adv; |
28011cf1 | 858 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | |
00db8189 | 859 | ADVERTISE_PAUSE_ASYM); |
37f07023 | 860 | adv |= ethtool_adv_to_mii_adv_t(advertise); |
00db8189 | 861 | |
51e2a384 TP |
862 | if (adv != oldadv) { |
863 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
00db8189 | 864 | |
51e2a384 TP |
865 | if (err < 0) |
866 | return err; | |
867 | changed = 1; | |
868 | } | |
00db8189 | 869 | |
5273e3a5 FF |
870 | bmsr = phy_read(phydev, MII_BMSR); |
871 | if (bmsr < 0) | |
872 | return bmsr; | |
873 | ||
874 | /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all | |
875 | * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a | |
876 | * logical 1. | |
877 | */ | |
878 | if (!(bmsr & BMSR_ESTATEN)) | |
879 | return changed; | |
880 | ||
00db8189 | 881 | /* Configure gigabit if it's supported */ |
5273e3a5 FF |
882 | adv = phy_read(phydev, MII_CTRL1000); |
883 | if (adv < 0) | |
884 | return adv; | |
885 | ||
886 | oldadv = adv; | |
887 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); | |
888 | ||
00db8189 | 889 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
2f53e904 | 890 | SUPPORTED_1000baseT_Full)) { |
37f07023 | 891 | adv |= ethtool_adv_to_mii_ctrl1000_t(advertise); |
00db8189 AF |
892 | } |
893 | ||
eb686231 M |
894 | if (adv != oldadv) |
895 | changed = 1; | |
896 | ||
5273e3a5 FF |
897 | err = phy_write(phydev, MII_CTRL1000, adv); |
898 | if (err < 0) | |
899 | return err; | |
900 | ||
51e2a384 | 901 | return changed; |
00db8189 | 902 | } |
00db8189 | 903 | |
b3df0da8 RD |
904 | /** |
905 | * genphy_setup_forced - configures/forces speed/duplex from @phydev | |
906 | * @phydev: target phy_device struct | |
00db8189 | 907 | * |
b3df0da8 | 908 | * Description: Configures MII_BMCR to force speed/duplex |
00db8189 | 909 | * to the values in phydev. Assumes that the values are valid. |
b3df0da8 RD |
910 | * Please see phy_sanitize_settings(). |
911 | */ | |
3fb69bca | 912 | int genphy_setup_forced(struct phy_device *phydev) |
00db8189 | 913 | { |
bc1e0a09 | 914 | int ctl = 0; |
00db8189 | 915 | |
2f53e904 SS |
916 | phydev->pause = 0; |
917 | phydev->asym_pause = 0; | |
00db8189 AF |
918 | |
919 | if (SPEED_1000 == phydev->speed) | |
920 | ctl |= BMCR_SPEED1000; | |
921 | else if (SPEED_100 == phydev->speed) | |
922 | ctl |= BMCR_SPEED100; | |
923 | ||
924 | if (DUPLEX_FULL == phydev->duplex) | |
925 | ctl |= BMCR_FULLDPLX; | |
e109374f | 926 | |
e62a768f | 927 | return phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 928 | } |
3fb69bca | 929 | EXPORT_SYMBOL(genphy_setup_forced); |
00db8189 | 930 | |
b3df0da8 RD |
931 | /** |
932 | * genphy_restart_aneg - Enable and Restart Autonegotiation | |
933 | * @phydev: target phy_device struct | |
934 | */ | |
00db8189 AF |
935 | int genphy_restart_aneg(struct phy_device *phydev) |
936 | { | |
553fe92b | 937 | int ctl = phy_read(phydev, MII_BMCR); |
00db8189 AF |
938 | |
939 | if (ctl < 0) | |
940 | return ctl; | |
941 | ||
2f53e904 | 942 | ctl |= BMCR_ANENABLE | BMCR_ANRESTART; |
00db8189 AF |
943 | |
944 | /* Don't isolate the PHY if we're negotiating */ | |
2f53e904 | 945 | ctl &= ~BMCR_ISOLATE; |
00db8189 | 946 | |
553fe92b | 947 | return phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 948 | } |
892871dc | 949 | EXPORT_SYMBOL(genphy_restart_aneg); |
00db8189 | 950 | |
b3df0da8 RD |
951 | /** |
952 | * genphy_config_aneg - restart auto-negotiation or write BMCR | |
953 | * @phydev: target phy_device struct | |
00db8189 | 954 | * |
b3df0da8 | 955 | * Description: If auto-negotiation is enabled, we configure the |
00db8189 | 956 | * advertising, and then restart auto-negotiation. If it is not |
b3df0da8 | 957 | * enabled, then we write the BMCR. |
00db8189 AF |
958 | */ |
959 | int genphy_config_aneg(struct phy_device *phydev) | |
960 | { | |
de339c2a | 961 | int result; |
00db8189 | 962 | |
de339c2a TP |
963 | if (AUTONEG_ENABLE != phydev->autoneg) |
964 | return genphy_setup_forced(phydev); | |
00db8189 | 965 | |
de339c2a | 966 | result = genphy_config_advert(phydev); |
de339c2a TP |
967 | if (result < 0) /* error */ |
968 | return result; | |
de339c2a | 969 | if (result == 0) { |
25985edc | 970 | /* Advertisement hasn't changed, but maybe aneg was never on to |
2f53e904 SS |
971 | * begin with? Or maybe phy was isolated? |
972 | */ | |
de339c2a TP |
973 | int ctl = phy_read(phydev, MII_BMCR); |
974 | ||
975 | if (ctl < 0) | |
976 | return ctl; | |
977 | ||
978 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) | |
979 | result = 1; /* do restart aneg */ | |
980 | } | |
981 | ||
982 | /* Only restart aneg if we are advertising something different | |
2f53e904 SS |
983 | * than we were before. |
984 | */ | |
de339c2a TP |
985 | if (result > 0) |
986 | result = genphy_restart_aneg(phydev); | |
00db8189 | 987 | |
51e2a384 | 988 | return result; |
00db8189 AF |
989 | } |
990 | EXPORT_SYMBOL(genphy_config_aneg); | |
991 | ||
a9fa6e6a FF |
992 | /** |
993 | * genphy_aneg_done - return auto-negotiation status | |
994 | * @phydev: target phy_device struct | |
995 | * | |
996 | * Description: Reads the status register and returns 0 either if | |
997 | * auto-negotiation is incomplete, or if there was an error. | |
998 | * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. | |
999 | */ | |
1000 | int genphy_aneg_done(struct phy_device *phydev) | |
1001 | { | |
1002 | int retval = phy_read(phydev, MII_BMSR); | |
1003 | ||
1004 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); | |
1005 | } | |
1006 | EXPORT_SYMBOL(genphy_aneg_done); | |
1007 | ||
395056ed | 1008 | static int gen10g_config_aneg(struct phy_device *phydev) |
124059fd AF |
1009 | { |
1010 | return 0; | |
1011 | } | |
124059fd | 1012 | |
b3df0da8 RD |
1013 | /** |
1014 | * genphy_update_link - update link status in @phydev | |
1015 | * @phydev: target phy_device struct | |
00db8189 | 1016 | * |
b3df0da8 | 1017 | * Description: Update the value in phydev->link to reflect the |
00db8189 | 1018 | * current link value. In order to do this, we need to read |
b3df0da8 | 1019 | * the status register twice, keeping the second value. |
00db8189 AF |
1020 | */ |
1021 | int genphy_update_link(struct phy_device *phydev) | |
1022 | { | |
1023 | int status; | |
1024 | ||
1025 | /* Do a fake read */ | |
1026 | status = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
1027 | if (status < 0) |
1028 | return status; | |
1029 | ||
1030 | /* Read link and autonegotiation status */ | |
1031 | status = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
1032 | if (status < 0) |
1033 | return status; | |
1034 | ||
1035 | if ((status & BMSR_LSTATUS) == 0) | |
1036 | phydev->link = 0; | |
1037 | else | |
1038 | phydev->link = 1; | |
1039 | ||
1040 | return 0; | |
1041 | } | |
6b655529 | 1042 | EXPORT_SYMBOL(genphy_update_link); |
00db8189 | 1043 | |
b3df0da8 RD |
1044 | /** |
1045 | * genphy_read_status - check the link status and update current link state | |
1046 | * @phydev: target phy_device struct | |
00db8189 | 1047 | * |
b3df0da8 | 1048 | * Description: Check the link, then figure out the current state |
00db8189 AF |
1049 | * by comparing what we advertise with what the link partner |
1050 | * advertises. Start by checking the gigabit possibilities, | |
1051 | * then move on to 10/100. | |
1052 | */ | |
1053 | int genphy_read_status(struct phy_device *phydev) | |
1054 | { | |
1055 | int adv; | |
1056 | int err; | |
1057 | int lpa; | |
1058 | int lpagb = 0; | |
a4572e0c CB |
1059 | int common_adv; |
1060 | int common_adv_gb = 0; | |
00db8189 | 1061 | |
2f53e904 | 1062 | /* Update the link, but return if there was an error */ |
00db8189 AF |
1063 | err = genphy_update_link(phydev); |
1064 | if (err) | |
1065 | return err; | |
1066 | ||
114002bc FF |
1067 | phydev->lp_advertising = 0; |
1068 | ||
00db8189 AF |
1069 | if (AUTONEG_ENABLE == phydev->autoneg) { |
1070 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
1071 | | SUPPORTED_1000baseT_Full)) { | |
1072 | lpagb = phy_read(phydev, MII_STAT1000); | |
00db8189 AF |
1073 | if (lpagb < 0) |
1074 | return lpagb; | |
1075 | ||
1076 | adv = phy_read(phydev, MII_CTRL1000); | |
00db8189 AF |
1077 | if (adv < 0) |
1078 | return adv; | |
1079 | ||
114002bc FF |
1080 | phydev->lp_advertising = |
1081 | mii_stat1000_to_ethtool_lpa_t(lpagb); | |
a4572e0c | 1082 | common_adv_gb = lpagb & adv << 2; |
00db8189 AF |
1083 | } |
1084 | ||
1085 | lpa = phy_read(phydev, MII_LPA); | |
00db8189 AF |
1086 | if (lpa < 0) |
1087 | return lpa; | |
1088 | ||
114002bc FF |
1089 | phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa); |
1090 | ||
00db8189 | 1091 | adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
1092 | if (adv < 0) |
1093 | return adv; | |
1094 | ||
a4572e0c | 1095 | common_adv = lpa & adv; |
00db8189 AF |
1096 | |
1097 | phydev->speed = SPEED_10; | |
1098 | phydev->duplex = DUPLEX_HALF; | |
2f53e904 SS |
1099 | phydev->pause = 0; |
1100 | phydev->asym_pause = 0; | |
00db8189 | 1101 | |
a4572e0c | 1102 | if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) { |
00db8189 AF |
1103 | phydev->speed = SPEED_1000; |
1104 | ||
a4572e0c | 1105 | if (common_adv_gb & LPA_1000FULL) |
00db8189 | 1106 | phydev->duplex = DUPLEX_FULL; |
a4572e0c | 1107 | } else if (common_adv & (LPA_100FULL | LPA_100HALF)) { |
00db8189 | 1108 | phydev->speed = SPEED_100; |
e109374f | 1109 | |
a4572e0c | 1110 | if (common_adv & LPA_100FULL) |
00db8189 AF |
1111 | phydev->duplex = DUPLEX_FULL; |
1112 | } else | |
a4572e0c | 1113 | if (common_adv & LPA_10FULL) |
00db8189 AF |
1114 | phydev->duplex = DUPLEX_FULL; |
1115 | ||
e109374f | 1116 | if (phydev->duplex == DUPLEX_FULL) { |
00db8189 AF |
1117 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; |
1118 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
1119 | } | |
1120 | } else { | |
1121 | int bmcr = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1122 | |
00db8189 AF |
1123 | if (bmcr < 0) |
1124 | return bmcr; | |
1125 | ||
1126 | if (bmcr & BMCR_FULLDPLX) | |
1127 | phydev->duplex = DUPLEX_FULL; | |
1128 | else | |
1129 | phydev->duplex = DUPLEX_HALF; | |
1130 | ||
1131 | if (bmcr & BMCR_SPEED1000) | |
1132 | phydev->speed = SPEED_1000; | |
1133 | else if (bmcr & BMCR_SPEED100) | |
1134 | phydev->speed = SPEED_100; | |
1135 | else | |
1136 | phydev->speed = SPEED_10; | |
1137 | ||
2f53e904 SS |
1138 | phydev->pause = 0; |
1139 | phydev->asym_pause = 0; | |
00db8189 AF |
1140 | } |
1141 | ||
1142 | return 0; | |
1143 | } | |
1144 | EXPORT_SYMBOL(genphy_read_status); | |
1145 | ||
395056ed | 1146 | static int gen10g_read_status(struct phy_device *phydev) |
124059fd AF |
1147 | { |
1148 | int devad, reg; | |
1149 | u32 mmd_mask = phydev->c45_ids.devices_in_package; | |
1150 | ||
1151 | phydev->link = 1; | |
1152 | ||
1153 | /* For now just lie and say it's 10G all the time */ | |
1154 | phydev->speed = SPEED_10000; | |
1155 | phydev->duplex = DUPLEX_FULL; | |
1156 | ||
1157 | for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) { | |
1158 | if (!(mmd_mask & 1)) | |
1159 | continue; | |
1160 | ||
1161 | /* Read twice because link state is latched and a | |
1162 | * read moves the current state into the register | |
1163 | */ | |
1164 | phy_read_mmd(phydev, devad, MDIO_STAT1); | |
1165 | reg = phy_read_mmd(phydev, devad, MDIO_STAT1); | |
1166 | if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS)) | |
1167 | phydev->link = 0; | |
1168 | } | |
1169 | ||
1170 | return 0; | |
1171 | } | |
124059fd | 1172 | |
797ac071 FF |
1173 | /** |
1174 | * genphy_soft_reset - software reset the PHY via BMCR_RESET bit | |
1175 | * @phydev: target phy_device struct | |
1176 | * | |
1177 | * Description: Perform a software PHY reset using the standard | |
1178 | * BMCR_RESET bit and poll for the reset bit to be cleared. | |
1179 | * | |
1180 | * Returns: 0 on success, < 0 on failure | |
1181 | */ | |
1182 | int genphy_soft_reset(struct phy_device *phydev) | |
1183 | { | |
1184 | int ret; | |
1185 | ||
1186 | ret = phy_write(phydev, MII_BMCR, BMCR_RESET); | |
1187 | if (ret < 0) | |
1188 | return ret; | |
1189 | ||
1190 | return phy_poll_reset(phydev); | |
1191 | } | |
1192 | EXPORT_SYMBOL(genphy_soft_reset); | |
1193 | ||
af6b6967 | 1194 | int genphy_config_init(struct phy_device *phydev) |
00db8189 | 1195 | { |
84c22d79 | 1196 | int val; |
00db8189 AF |
1197 | u32 features; |
1198 | ||
00db8189 AF |
1199 | features = (SUPPORTED_TP | SUPPORTED_MII |
1200 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
1201 | SUPPORTED_BNC); | |
1202 | ||
1203 | /* Do we support autonegotiation? */ | |
1204 | val = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
1205 | if (val < 0) |
1206 | return val; | |
1207 | ||
1208 | if (val & BMSR_ANEGCAPABLE) | |
1209 | features |= SUPPORTED_Autoneg; | |
1210 | ||
1211 | if (val & BMSR_100FULL) | |
1212 | features |= SUPPORTED_100baseT_Full; | |
1213 | if (val & BMSR_100HALF) | |
1214 | features |= SUPPORTED_100baseT_Half; | |
1215 | if (val & BMSR_10FULL) | |
1216 | features |= SUPPORTED_10baseT_Full; | |
1217 | if (val & BMSR_10HALF) | |
1218 | features |= SUPPORTED_10baseT_Half; | |
1219 | ||
1220 | if (val & BMSR_ESTATEN) { | |
1221 | val = phy_read(phydev, MII_ESTATUS); | |
00db8189 AF |
1222 | if (val < 0) |
1223 | return val; | |
1224 | ||
1225 | if (val & ESTATUS_1000_TFULL) | |
1226 | features |= SUPPORTED_1000baseT_Full; | |
1227 | if (val & ESTATUS_1000_THALF) | |
1228 | features |= SUPPORTED_1000baseT_Half; | |
1229 | } | |
1230 | ||
c242a472 SH |
1231 | phydev->supported &= features; |
1232 | phydev->advertising &= features; | |
00db8189 AF |
1233 | |
1234 | return 0; | |
1235 | } | |
124059fd | 1236 | |
9df81dd7 FF |
1237 | static int gen10g_soft_reset(struct phy_device *phydev) |
1238 | { | |
1239 | /* Do nothing for now */ | |
1240 | return 0; | |
1241 | } | |
af6b6967 | 1242 | EXPORT_SYMBOL(genphy_config_init); |
9df81dd7 | 1243 | |
124059fd AF |
1244 | static int gen10g_config_init(struct phy_device *phydev) |
1245 | { | |
1246 | /* Temporarily just say we support everything */ | |
1247 | phydev->supported = SUPPORTED_10000baseT_Full; | |
1248 | phydev->advertising = SUPPORTED_10000baseT_Full; | |
1249 | ||
1250 | return 0; | |
1251 | } | |
1252 | ||
0f0ca340 GC |
1253 | int genphy_suspend(struct phy_device *phydev) |
1254 | { | |
1255 | int value; | |
1256 | ||
1257 | mutex_lock(&phydev->lock); | |
1258 | ||
1259 | value = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1260 | phy_write(phydev, MII_BMCR, value | BMCR_PDOWN); |
0f0ca340 GC |
1261 | |
1262 | mutex_unlock(&phydev->lock); | |
1263 | ||
1264 | return 0; | |
1265 | } | |
1266 | EXPORT_SYMBOL(genphy_suspend); | |
00db8189 | 1267 | |
395056ed | 1268 | static int gen10g_suspend(struct phy_device *phydev) |
124059fd AF |
1269 | { |
1270 | return 0; | |
1271 | } | |
124059fd | 1272 | |
0f0ca340 GC |
1273 | int genphy_resume(struct phy_device *phydev) |
1274 | { | |
1275 | int value; | |
1276 | ||
1277 | mutex_lock(&phydev->lock); | |
1278 | ||
1279 | value = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1280 | phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN); |
0f0ca340 GC |
1281 | |
1282 | mutex_unlock(&phydev->lock); | |
1283 | ||
1284 | return 0; | |
1285 | } | |
1286 | EXPORT_SYMBOL(genphy_resume); | |
00db8189 | 1287 | |
395056ed | 1288 | static int gen10g_resume(struct phy_device *phydev) |
124059fd AF |
1289 | { |
1290 | return 0; | |
1291 | } | |
124059fd | 1292 | |
f3a6bd39 SH |
1293 | static int __set_phy_supported(struct phy_device *phydev, u32 max_speed) |
1294 | { | |
1295 | /* The default values for phydev->supported are provided by the PHY | |
1296 | * driver "features" member, we want to reset to sane defaults first | |
1297 | * before supporting higher speeds. | |
1298 | */ | |
1299 | phydev->supported &= PHY_DEFAULT_FEATURES; | |
1300 | ||
1301 | switch (max_speed) { | |
1302 | default: | |
1303 | return -ENOTSUPP; | |
1304 | case SPEED_1000: | |
1305 | phydev->supported |= PHY_1000BT_FEATURES; | |
1306 | /* fall through */ | |
1307 | case SPEED_100: | |
1308 | phydev->supported |= PHY_100BT_FEATURES; | |
1309 | /* fall through */ | |
1310 | case SPEED_10: | |
1311 | phydev->supported |= PHY_10BT_FEATURES; | |
1312 | } | |
1313 | ||
1314 | return 0; | |
1315 | } | |
1316 | ||
1317 | int phy_set_max_speed(struct phy_device *phydev, u32 max_speed) | |
1318 | { | |
1319 | int err; | |
1320 | ||
1321 | err = __set_phy_supported(phydev, max_speed); | |
1322 | if (err) | |
1323 | return err; | |
1324 | ||
1325 | phydev->advertising = phydev->supported; | |
1326 | ||
1327 | return 0; | |
1328 | } | |
1329 | EXPORT_SYMBOL(phy_set_max_speed); | |
1330 | ||
de906af1 SH |
1331 | static void of_set_phy_supported(struct phy_device *phydev) |
1332 | { | |
1333 | struct device_node *node = phydev->dev.of_node; | |
1334 | u32 max_speed; | |
1335 | ||
1336 | if (!IS_ENABLED(CONFIG_OF_MDIO)) | |
1337 | return; | |
1338 | ||
1339 | if (!node) | |
1340 | return; | |
1341 | ||
f3a6bd39 SH |
1342 | if (!of_property_read_u32(node, "max-speed", &max_speed)) |
1343 | __set_phy_supported(phydev, max_speed); | |
de906af1 SH |
1344 | } |
1345 | ||
b3df0da8 RD |
1346 | /** |
1347 | * phy_probe - probe and init a PHY device | |
1348 | * @dev: device to probe and init | |
00db8189 | 1349 | * |
b3df0da8 | 1350 | * Description: Take care of setting up the phy_device structure, |
00db8189 AF |
1351 | * set the state to READY (the driver's init function should |
1352 | * set it to STARTING if needed). | |
1353 | */ | |
1354 | static int phy_probe(struct device *dev) | |
1355 | { | |
553fe92b SS |
1356 | struct phy_device *phydev = to_phy_device(dev); |
1357 | struct device_driver *drv = phydev->dev.driver; | |
1358 | struct phy_driver *phydrv = to_phy_driver(drv); | |
00db8189 AF |
1359 | int err = 0; |
1360 | ||
00db8189 AF |
1361 | phydev->drv = phydrv; |
1362 | ||
2c7b4921 FF |
1363 | /* Disable the interrupt if the PHY doesn't support it |
1364 | * but the interrupt is still a valid one | |
1365 | */ | |
1366 | if (!(phydrv->flags & PHY_HAS_INTERRUPT) && | |
2f53e904 | 1367 | phy_interrupt_is_valid(phydev)) |
00db8189 AF |
1368 | phydev->irq = PHY_POLL; |
1369 | ||
4284b6a5 FF |
1370 | if (phydrv->flags & PHY_IS_INTERNAL) |
1371 | phydev->is_internal = true; | |
1372 | ||
35b5f6b1 | 1373 | mutex_lock(&phydev->lock); |
00db8189 AF |
1374 | |
1375 | /* Start out supporting everything. Eventually, | |
1376 | * a controller will attach, and may modify one | |
2f53e904 SS |
1377 | * or both of these values |
1378 | */ | |
00db8189 | 1379 | phydev->supported = phydrv->features; |
de906af1 SH |
1380 | of_set_phy_supported(phydev); |
1381 | phydev->advertising = phydev->supported; | |
00db8189 AF |
1382 | |
1383 | /* Set the state to READY by default */ | |
1384 | phydev->state = PHY_READY; | |
1385 | ||
1386 | if (phydev->drv->probe) | |
1387 | err = phydev->drv->probe(phydev); | |
1388 | ||
35b5f6b1 | 1389 | mutex_unlock(&phydev->lock); |
00db8189 | 1390 | |
00db8189 AF |
1391 | return err; |
1392 | } | |
1393 | ||
1394 | static int phy_remove(struct device *dev) | |
1395 | { | |
553fe92b | 1396 | struct phy_device *phydev = to_phy_device(dev); |
00db8189 | 1397 | |
35b5f6b1 | 1398 | mutex_lock(&phydev->lock); |
00db8189 | 1399 | phydev->state = PHY_DOWN; |
35b5f6b1 | 1400 | mutex_unlock(&phydev->lock); |
00db8189 AF |
1401 | |
1402 | if (phydev->drv->remove) | |
1403 | phydev->drv->remove(phydev); | |
00db8189 AF |
1404 | phydev->drv = NULL; |
1405 | ||
1406 | return 0; | |
1407 | } | |
1408 | ||
b3df0da8 RD |
1409 | /** |
1410 | * phy_driver_register - register a phy_driver with the PHY layer | |
1411 | * @new_driver: new phy_driver to register | |
1412 | */ | |
00db8189 AF |
1413 | int phy_driver_register(struct phy_driver *new_driver) |
1414 | { | |
1415 | int retval; | |
1416 | ||
00db8189 AF |
1417 | new_driver->driver.name = new_driver->name; |
1418 | new_driver->driver.bus = &mdio_bus_type; | |
1419 | new_driver->driver.probe = phy_probe; | |
1420 | new_driver->driver.remove = phy_remove; | |
1421 | ||
1422 | retval = driver_register(&new_driver->driver); | |
00db8189 | 1423 | if (retval) { |
8d242488 JP |
1424 | pr_err("%s: Error %d in registering driver\n", |
1425 | new_driver->name, retval); | |
00db8189 AF |
1426 | |
1427 | return retval; | |
1428 | } | |
1429 | ||
f2511f13 | 1430 | pr_debug("%s: Registered new driver\n", new_driver->name); |
00db8189 AF |
1431 | |
1432 | return 0; | |
1433 | } | |
1434 | EXPORT_SYMBOL(phy_driver_register); | |
1435 | ||
d5bf9071 CH |
1436 | int phy_drivers_register(struct phy_driver *new_driver, int n) |
1437 | { | |
1438 | int i, ret = 0; | |
1439 | ||
1440 | for (i = 0; i < n; i++) { | |
1441 | ret = phy_driver_register(new_driver + i); | |
1442 | if (ret) { | |
1443 | while (i-- > 0) | |
1444 | phy_driver_unregister(new_driver + i); | |
1445 | break; | |
1446 | } | |
1447 | } | |
1448 | return ret; | |
1449 | } | |
1450 | EXPORT_SYMBOL(phy_drivers_register); | |
1451 | ||
00db8189 AF |
1452 | void phy_driver_unregister(struct phy_driver *drv) |
1453 | { | |
1454 | driver_unregister(&drv->driver); | |
1455 | } | |
1456 | EXPORT_SYMBOL(phy_driver_unregister); | |
1457 | ||
d5bf9071 CH |
1458 | void phy_drivers_unregister(struct phy_driver *drv, int n) |
1459 | { | |
1460 | int i; | |
2f53e904 SS |
1461 | |
1462 | for (i = 0; i < n; i++) | |
d5bf9071 | 1463 | phy_driver_unregister(drv + i); |
d5bf9071 CH |
1464 | } |
1465 | EXPORT_SYMBOL(phy_drivers_unregister); | |
1466 | ||
ab2145ed SX |
1467 | static struct phy_driver genphy_driver[] = { |
1468 | { | |
e1393456 AF |
1469 | .phy_id = 0xffffffff, |
1470 | .phy_id_mask = 0xffffffff, | |
1471 | .name = "Generic PHY", | |
9df81dd7 | 1472 | .soft_reset = genphy_soft_reset, |
e1393456 | 1473 | .config_init = genphy_config_init, |
c242a472 SH |
1474 | .features = PHY_GBIT_FEATURES | SUPPORTED_MII | |
1475 | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
1476 | SUPPORTED_BNC, | |
e1393456 | 1477 | .config_aneg = genphy_config_aneg, |
76a423a3 | 1478 | .aneg_done = genphy_aneg_done, |
e1393456 | 1479 | .read_status = genphy_read_status, |
0f0ca340 GC |
1480 | .suspend = genphy_suspend, |
1481 | .resume = genphy_resume, | |
e109374f | 1482 | .driver = { .owner = THIS_MODULE, }, |
124059fd AF |
1483 | }, { |
1484 | .phy_id = 0xffffffff, | |
1485 | .phy_id_mask = 0xffffffff, | |
1486 | .name = "Generic 10G PHY", | |
9df81dd7 | 1487 | .soft_reset = gen10g_soft_reset, |
124059fd AF |
1488 | .config_init = gen10g_config_init, |
1489 | .features = 0, | |
1490 | .config_aneg = gen10g_config_aneg, | |
1491 | .read_status = gen10g_read_status, | |
1492 | .suspend = gen10g_suspend, | |
1493 | .resume = gen10g_resume, | |
1494 | .driver = {.owner = THIS_MODULE, }, | |
ab2145ed | 1495 | } }; |
00db8189 | 1496 | |
67c4f3fa | 1497 | static int __init phy_init(void) |
00db8189 | 1498 | { |
67c4f3fa | 1499 | int rc; |
67c4f3fa JG |
1500 | |
1501 | rc = mdio_bus_init(); | |
1502 | if (rc) | |
e1393456 | 1503 | return rc; |
00db8189 | 1504 | |
ab2145ed SX |
1505 | rc = phy_drivers_register(genphy_driver, |
1506 | ARRAY_SIZE(genphy_driver)); | |
e1393456 AF |
1507 | if (rc) |
1508 | mdio_bus_exit(); | |
67c4f3fa | 1509 | |
67c4f3fa | 1510 | return rc; |
00db8189 AF |
1511 | } |
1512 | ||
67c4f3fa | 1513 | static void __exit phy_exit(void) |
00db8189 | 1514 | { |
ab2145ed SX |
1515 | phy_drivers_unregister(genphy_driver, |
1516 | ARRAY_SIZE(genphy_driver)); | |
e1393456 | 1517 | mdio_bus_exit(); |
00db8189 AF |
1518 | } |
1519 | ||
e1393456 | 1520 | subsys_initcall(phy_init); |
67c4f3fa | 1521 | module_exit(phy_exit); |