Commit | Line | Data |
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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 | { | |
fb28ad35 | 117 | if (strcmp(fixup->bus_id, dev_name(&phydev->dev)) != 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 | ||
208 | /** | |
209 | * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. | |
210 | * @bus: the target MII bus | |
211 | * @addr: PHY address on the MII bus | |
212 | * @phy_id: where to store the ID retrieved. | |
213 | * @c45_ids: where to store the c45 ID information. | |
214 | * | |
215 | * If the PHY devices-in-package appears to be valid, it and the | |
216 | * corresponding identifiers are stored in @c45_ids, zero is stored | |
217 | * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns | |
218 | * zero on success. | |
219 | * | |
220 | */ | |
221 | static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id, | |
222 | struct phy_c45_device_ids *c45_ids) { | |
223 | int phy_reg; | |
224 | int i, reg_addr; | |
225 | const int num_ids = ARRAY_SIZE(c45_ids->device_ids); | |
226 | ||
227 | /* Find first non-zero Devices In package. Device | |
228 | * zero is reserved, so don't probe it. | |
229 | */ | |
230 | for (i = 1; | |
231 | i < num_ids && c45_ids->devices_in_package == 0; | |
232 | i++) { | |
da1da284 | 233 | retry: reg_addr = MII_ADDR_C45 | i << 16 | MDIO_DEVS2; |
ac28b9f8 DD |
234 | phy_reg = mdiobus_read(bus, addr, reg_addr); |
235 | if (phy_reg < 0) | |
236 | return -EIO; | |
237 | c45_ids->devices_in_package = (phy_reg & 0xffff) << 16; | |
238 | ||
a7d5f58d | 239 | reg_addr = MII_ADDR_C45 | i << 16 | MDIO_DEVS1; |
ac28b9f8 DD |
240 | phy_reg = mdiobus_read(bus, addr, reg_addr); |
241 | if (phy_reg < 0) | |
242 | return -EIO; | |
243 | c45_ids->devices_in_package |= (phy_reg & 0xffff); | |
244 | ||
ac28b9f8 | 245 | if ((c45_ids->devices_in_package & 0x1fffffff) == 0x1fffffff) { |
da1da284 SL |
246 | if (i) { |
247 | /* If mostly Fs, there is no device there, | |
248 | * then let's continue to probe more, as some | |
249 | * 10G PHYs have zero Devices In package, | |
250 | * e.g. Cortina CS4315/CS4340 PHY. | |
251 | */ | |
252 | i = 0; | |
253 | goto retry; | |
254 | } else { | |
255 | /* no device there, let's get out of here */ | |
256 | *phy_id = 0xffffffff; | |
257 | return 0; | |
258 | } | |
ac28b9f8 DD |
259 | } |
260 | } | |
261 | ||
262 | /* Now probe Device Identifiers for each device present. */ | |
263 | for (i = 1; i < num_ids; i++) { | |
264 | if (!(c45_ids->devices_in_package & (1 << i))) | |
265 | continue; | |
266 | ||
267 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1; | |
268 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
269 | if (phy_reg < 0) | |
270 | return -EIO; | |
271 | c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16; | |
272 | ||
273 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2; | |
274 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
275 | if (phy_reg < 0) | |
276 | return -EIO; | |
277 | c45_ids->device_ids[i] |= (phy_reg & 0xffff); | |
278 | } | |
279 | *phy_id = 0; | |
280 | return 0; | |
281 | } | |
11b0bacd | 282 | |
b3df0da8 | 283 | /** |
cac1f3c8 | 284 | * get_phy_id - reads the specified addr for its ID. |
b3df0da8 RD |
285 | * @bus: the target MII bus |
286 | * @addr: PHY address on the MII bus | |
cac1f3c8 | 287 | * @phy_id: where to store the ID retrieved. |
ac28b9f8 DD |
288 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
289 | * @c45_ids: where to store the c45 ID information. | |
290 | * | |
291 | * Description: In the case of a 802.3-c22 PHY, reads the ID registers | |
292 | * of the PHY at @addr on the @bus, stores it in @phy_id and returns | |
293 | * zero on success. | |
294 | * | |
295 | * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and | |
296 | * its return value is in turn returned. | |
00db8189 | 297 | * |
00db8189 | 298 | */ |
ac28b9f8 DD |
299 | static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id, |
300 | bool is_c45, struct phy_c45_device_ids *c45_ids) | |
00db8189 AF |
301 | { |
302 | int phy_reg; | |
00db8189 | 303 | |
ac28b9f8 DD |
304 | if (is_c45) |
305 | return get_phy_c45_ids(bus, addr, phy_id, c45_ids); | |
306 | ||
2f53e904 | 307 | /* Grab the bits from PHYIR1, and put them in the upper half */ |
6fe32649 | 308 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); |
00db8189 | 309 | if (phy_reg < 0) |
cac1f3c8 | 310 | return -EIO; |
00db8189 | 311 | |
cac1f3c8 | 312 | *phy_id = (phy_reg & 0xffff) << 16; |
00db8189 AF |
313 | |
314 | /* Grab the bits from PHYIR2, and put them in the lower half */ | |
6fe32649 | 315 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); |
00db8189 | 316 | if (phy_reg < 0) |
cac1f3c8 PG |
317 | return -EIO; |
318 | ||
319 | *phy_id |= (phy_reg & 0xffff); | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | /** | |
2f53e904 SS |
325 | * get_phy_device - reads the specified PHY device and returns its @phy_device |
326 | * struct | |
cac1f3c8 PG |
327 | * @bus: the target MII bus |
328 | * @addr: PHY address on the MII bus | |
ac28b9f8 | 329 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
cac1f3c8 PG |
330 | * |
331 | * Description: Reads the ID registers of the PHY at @addr on the | |
332 | * @bus, then allocates and returns the phy_device to represent it. | |
333 | */ | |
ac28b9f8 | 334 | struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) |
cac1f3c8 | 335 | { |
ac28b9f8 | 336 | struct phy_c45_device_ids c45_ids = {0}; |
160c85f0 | 337 | u32 phy_id = 0; |
cac1f3c8 | 338 | int r; |
00db8189 | 339 | |
ac28b9f8 | 340 | r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids); |
cac1f3c8 PG |
341 | if (r) |
342 | return ERR_PTR(r); | |
00db8189 | 343 | |
6436cbcd GC |
344 | /* If the phy_id is mostly Fs, there is no device there */ |
345 | if ((phy_id & 0x1fffffff) == 0x1fffffff) | |
346 | return NULL; | |
347 | ||
e62a768f | 348 | return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); |
00db8189 | 349 | } |
4dea547f GL |
350 | EXPORT_SYMBOL(get_phy_device); |
351 | ||
352 | /** | |
353 | * phy_device_register - Register the phy device on the MDIO bus | |
1d4ac5d5 | 354 | * @phydev: phy_device structure to be added to the MDIO bus |
4dea547f GL |
355 | */ |
356 | int phy_device_register(struct phy_device *phydev) | |
357 | { | |
358 | int err; | |
359 | ||
2f53e904 | 360 | /* Don't register a phy if one is already registered at this address */ |
4dea547f GL |
361 | if (phydev->bus->phy_map[phydev->addr]) |
362 | return -EINVAL; | |
363 | phydev->bus->phy_map[phydev->addr] = phydev; | |
364 | ||
365 | /* Run all of the fixups for this PHY */ | |
d92f5dec | 366 | err = phy_scan_fixups(phydev); |
87aa9f9c FF |
367 | if (err) { |
368 | pr_err("PHY %d failed to initialize\n", phydev->addr); | |
369 | goto out; | |
370 | } | |
4dea547f | 371 | |
b2a43191 | 372 | err = device_add(&phydev->dev); |
4dea547f | 373 | if (err) { |
b2a43191 | 374 | pr_err("PHY %d failed to add\n", phydev->addr); |
4dea547f GL |
375 | goto out; |
376 | } | |
377 | ||
378 | return 0; | |
379 | ||
380 | out: | |
381 | phydev->bus->phy_map[phydev->addr] = NULL; | |
382 | return err; | |
383 | } | |
384 | EXPORT_SYMBOL(phy_device_register); | |
00db8189 | 385 | |
f8f76db1 JP |
386 | /** |
387 | * phy_find_first - finds the first PHY device on the bus | |
388 | * @bus: the target MII bus | |
389 | */ | |
390 | struct phy_device *phy_find_first(struct mii_bus *bus) | |
391 | { | |
392 | int addr; | |
393 | ||
394 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { | |
395 | if (bus->phy_map[addr]) | |
396 | return bus->phy_map[addr]; | |
397 | } | |
398 | return NULL; | |
399 | } | |
400 | EXPORT_SYMBOL(phy_find_first); | |
401 | ||
b3df0da8 RD |
402 | /** |
403 | * phy_prepare_link - prepares the PHY layer to monitor link status | |
404 | * @phydev: target phy_device struct | |
405 | * @handler: callback function for link status change notifications | |
00db8189 | 406 | * |
b3df0da8 | 407 | * Description: Tells the PHY infrastructure to handle the |
00db8189 AF |
408 | * gory details on monitoring link status (whether through |
409 | * polling or an interrupt), and to call back to the | |
410 | * connected device driver when the link status changes. | |
411 | * If you want to monitor your own link state, don't call | |
b3df0da8 RD |
412 | * this function. |
413 | */ | |
89ff05ec | 414 | static void phy_prepare_link(struct phy_device *phydev, |
2f53e904 | 415 | void (*handler)(struct net_device *)) |
00db8189 AF |
416 | { |
417 | phydev->adjust_link = handler; | |
418 | } | |
419 | ||
fa94f6d9 GL |
420 | /** |
421 | * phy_connect_direct - connect an ethernet device to a specific phy_device | |
422 | * @dev: the network device to connect | |
423 | * @phydev: the pointer to the phy device | |
424 | * @handler: callback function for state change notifications | |
fa94f6d9 GL |
425 | * @interface: PHY device's interface |
426 | */ | |
427 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, | |
f9a8f83b | 428 | void (*handler)(struct net_device *), |
fa94f6d9 GL |
429 | phy_interface_t interface) |
430 | { | |
431 | int rc; | |
432 | ||
f9a8f83b | 433 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
fa94f6d9 GL |
434 | if (rc) |
435 | return rc; | |
436 | ||
437 | phy_prepare_link(phydev, handler); | |
29935aeb | 438 | phy_start_machine(phydev); |
fa94f6d9 GL |
439 | if (phydev->irq > 0) |
440 | phy_start_interrupts(phydev); | |
441 | ||
442 | return 0; | |
443 | } | |
444 | EXPORT_SYMBOL(phy_connect_direct); | |
445 | ||
b3df0da8 RD |
446 | /** |
447 | * phy_connect - connect an ethernet device to a PHY device | |
448 | * @dev: the network device to connect | |
5d12b132 | 449 | * @bus_id: the id string of the PHY device to connect |
b3df0da8 | 450 | * @handler: callback function for state change notifications |
b3df0da8 | 451 | * @interface: PHY device's interface |
e1393456 | 452 | * |
b3df0da8 | 453 | * Description: Convenience function for connecting ethernet |
e1393456 AF |
454 | * devices to PHY devices. The default behavior is for |
455 | * the PHY infrastructure to handle everything, and only notify | |
456 | * the connected driver when the link status changes. If you | |
457 | * don't want, or can't use the provided functionality, you may | |
458 | * choose to call only the subset of functions which provide | |
459 | * the desired functionality. | |
460 | */ | |
e109374f | 461 | struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, |
2f53e904 SS |
462 | void (*handler)(struct net_device *), |
463 | phy_interface_t interface) | |
e1393456 AF |
464 | { |
465 | struct phy_device *phydev; | |
fa94f6d9 GL |
466 | struct device *d; |
467 | int rc; | |
e1393456 | 468 | |
fa94f6d9 | 469 | /* Search the list of PHY devices on the mdio bus for the |
2f53e904 SS |
470 | * PHY with the requested name |
471 | */ | |
fa94f6d9 GL |
472 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); |
473 | if (!d) { | |
474 | pr_err("PHY %s not found\n", bus_id); | |
475 | return ERR_PTR(-ENODEV); | |
476 | } | |
477 | phydev = to_phy_device(d); | |
e1393456 | 478 | |
f9a8f83b | 479 | rc = phy_connect_direct(dev, phydev, handler, interface); |
fa94f6d9 GL |
480 | if (rc) |
481 | return ERR_PTR(rc); | |
e1393456 AF |
482 | |
483 | return phydev; | |
484 | } | |
485 | EXPORT_SYMBOL(phy_connect); | |
486 | ||
b3df0da8 | 487 | /** |
2f53e904 SS |
488 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY |
489 | * device | |
b3df0da8 RD |
490 | * @phydev: target phy_device struct |
491 | */ | |
e1393456 AF |
492 | void phy_disconnect(struct phy_device *phydev) |
493 | { | |
494 | if (phydev->irq > 0) | |
495 | phy_stop_interrupts(phydev); | |
496 | ||
497 | phy_stop_machine(phydev); | |
e109374f | 498 | |
e1393456 AF |
499 | phydev->adjust_link = NULL; |
500 | ||
501 | phy_detach(phydev); | |
502 | } | |
503 | EXPORT_SYMBOL(phy_disconnect); | |
504 | ||
87aa9f9c FF |
505 | /** |
506 | * phy_poll_reset - Safely wait until a PHY reset has properly completed | |
507 | * @phydev: The PHY device to poll | |
508 | * | |
509 | * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as | |
510 | * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR | |
511 | * register must be polled until the BMCR_RESET bit clears. | |
512 | * | |
513 | * Furthermore, any attempts to write to PHY registers may have no effect | |
514 | * or even generate MDIO bus errors until this is complete. | |
515 | * | |
516 | * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the | |
517 | * standard and do not fully reset after the BMCR_RESET bit is set, and may | |
518 | * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an | |
519 | * effort to support such broken PHYs, this function is separate from the | |
520 | * standard phy_init_hw() which will zero all the other bits in the BMCR | |
521 | * and reapply all driver-specific and board-specific fixups. | |
522 | */ | |
523 | static int phy_poll_reset(struct phy_device *phydev) | |
524 | { | |
525 | /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ | |
526 | unsigned int retries = 12; | |
527 | int ret; | |
528 | ||
529 | do { | |
530 | msleep(50); | |
531 | ret = phy_read(phydev, MII_BMCR); | |
532 | if (ret < 0) | |
533 | return ret; | |
534 | } while (ret & BMCR_RESET && --retries); | |
535 | if (ret & BMCR_RESET) | |
536 | return -ETIMEDOUT; | |
537 | ||
2f53e904 | 538 | /* Some chips (smsc911x) may still need up to another 1ms after the |
87aa9f9c FF |
539 | * BMCR_RESET bit is cleared before they are usable. |
540 | */ | |
541 | msleep(1); | |
542 | return 0; | |
543 | } | |
544 | ||
2f5cb434 AV |
545 | int phy_init_hw(struct phy_device *phydev) |
546 | { | |
9df81dd7 | 547 | int ret = 0; |
2f5cb434 AV |
548 | |
549 | if (!phydev->drv || !phydev->drv->config_init) | |
550 | return 0; | |
551 | ||
9df81dd7 FF |
552 | if (phydev->drv->soft_reset) |
553 | ret = phydev->drv->soft_reset(phydev); | |
554 | else | |
555 | ret = genphy_soft_reset(phydev); | |
556 | ||
87aa9f9c FF |
557 | if (ret < 0) |
558 | return ret; | |
559 | ||
2f5cb434 AV |
560 | ret = phy_scan_fixups(phydev); |
561 | if (ret < 0) | |
562 | return ret; | |
563 | ||
564 | return phydev->drv->config_init(phydev); | |
565 | } | |
87aa9f9c | 566 | EXPORT_SYMBOL(phy_init_hw); |
2f5cb434 | 567 | |
b3df0da8 | 568 | /** |
fa94f6d9 | 569 | * phy_attach_direct - attach a network device to a given PHY device pointer |
b3df0da8 | 570 | * @dev: network device to attach |
fa94f6d9 | 571 | * @phydev: Pointer to phy_device to attach |
b3df0da8 RD |
572 | * @flags: PHY device's dev_flags |
573 | * @interface: PHY device's interface | |
e1393456 | 574 | * |
b3df0da8 | 575 | * Description: Called by drivers to attach to a particular PHY |
e1393456 | 576 | * device. The phy_device is found, and properly hooked up |
257184d7 AF |
577 | * to the phy_driver. If no driver is attached, then a |
578 | * generic driver is used. The phy_device is given a ptr to | |
e1393456 | 579 | * the attaching device, and given a callback for link status |
b3df0da8 | 580 | * change. The phy_device is returned to the attaching driver. |
e1393456 | 581 | */ |
257184d7 AF |
582 | int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
583 | u32 flags, phy_interface_t interface) | |
e1393456 | 584 | { |
fa94f6d9 | 585 | struct device *d = &phydev->dev; |
b3565f27 | 586 | struct module *bus_module; |
d005a09e | 587 | int err; |
e1393456 AF |
588 | |
589 | /* Assume that if there is no driver, that it doesn't | |
2f53e904 SS |
590 | * exist, and we should use the genphy driver. |
591 | */ | |
ef899c07 | 592 | if (!d->driver) { |
257184d7 AF |
593 | if (phydev->is_c45) |
594 | d->driver = &genphy_driver[GENPHY_DRV_10G].driver; | |
595 | else | |
596 | d->driver = &genphy_driver[GENPHY_DRV_1G].driver; | |
e1393456 AF |
597 | |
598 | err = d->driver->probe(d); | |
b7a00ecd JG |
599 | if (err >= 0) |
600 | err = device_bind_driver(d); | |
e1393456 | 601 | |
b7a00ecd | 602 | if (err) |
fa94f6d9 | 603 | return err; |
e1393456 AF |
604 | } |
605 | ||
606 | if (phydev->attached_dev) { | |
fa94f6d9 GL |
607 | dev_err(&dev->dev, "PHY already attached\n"); |
608 | return -EBUSY; | |
e1393456 AF |
609 | } |
610 | ||
b3565f27 EG |
611 | /* Increment the bus module reference count */ |
612 | bus_module = phydev->bus->dev.driver ? | |
613 | phydev->bus->dev.driver->owner : NULL; | |
614 | if (!try_module_get(bus_module)) { | |
615 | dev_err(&dev->dev, "failed to get the bus module\n"); | |
616 | return -EIO; | |
617 | } | |
618 | ||
e1393456 | 619 | phydev->attached_dev = dev; |
c1f19b51 | 620 | dev->phydev = phydev; |
e1393456 AF |
621 | |
622 | phydev->dev_flags = flags; | |
623 | ||
e8a2b6a4 AF |
624 | phydev->interface = interface; |
625 | ||
ef24b16b AV |
626 | phydev->state = PHY_READY; |
627 | ||
e8a2b6a4 AF |
628 | /* Do initial configuration here, now that |
629 | * we have certain key parameters | |
2f53e904 SS |
630 | * (dev_flags and interface) |
631 | */ | |
d005a09e MKB |
632 | err = phy_init_hw(phydev); |
633 | if (err) | |
634 | phy_detach(phydev); | |
b394745d GR |
635 | else |
636 | phy_resume(phydev); | |
1211ce53 | 637 | |
d005a09e | 638 | return err; |
fa94f6d9 | 639 | } |
257184d7 | 640 | EXPORT_SYMBOL(phy_attach_direct); |
fa94f6d9 GL |
641 | |
642 | /** | |
643 | * phy_attach - attach a network device to a particular PHY device | |
644 | * @dev: network device to attach | |
645 | * @bus_id: Bus ID of PHY device to attach | |
fa94f6d9 GL |
646 | * @interface: PHY device's interface |
647 | * | |
648 | * Description: Same as phy_attach_direct() except that a PHY bus_id | |
649 | * string is passed instead of a pointer to a struct phy_device. | |
650 | */ | |
2f53e904 SS |
651 | struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, |
652 | phy_interface_t interface) | |
fa94f6d9 GL |
653 | { |
654 | struct bus_type *bus = &mdio_bus_type; | |
655 | struct phy_device *phydev; | |
656 | struct device *d; | |
657 | int rc; | |
658 | ||
659 | /* Search the list of PHY devices on the mdio bus for the | |
2f53e904 SS |
660 | * PHY with the requested name |
661 | */ | |
fa94f6d9 GL |
662 | d = bus_find_device_by_name(bus, NULL, bus_id); |
663 | if (!d) { | |
664 | pr_err("PHY %s not found\n", bus_id); | |
665 | return ERR_PTR(-ENODEV); | |
e8a2b6a4 | 666 | } |
fa94f6d9 GL |
667 | phydev = to_phy_device(d); |
668 | ||
f9a8f83b | 669 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
fa94f6d9 GL |
670 | if (rc) |
671 | return ERR_PTR(rc); | |
e8a2b6a4 | 672 | |
e1393456 AF |
673 | return phydev; |
674 | } | |
675 | EXPORT_SYMBOL(phy_attach); | |
676 | ||
b3df0da8 RD |
677 | /** |
678 | * phy_detach - detach a PHY device from its network device | |
679 | * @phydev: target phy_device struct | |
680 | */ | |
e1393456 AF |
681 | void phy_detach(struct phy_device *phydev) |
682 | { | |
ab2145ed | 683 | int i; |
b3565f27 EG |
684 | |
685 | if (phydev->bus->dev.driver) | |
686 | module_put(phydev->bus->dev.driver->owner); | |
687 | ||
c1f19b51 | 688 | phydev->attached_dev->phydev = NULL; |
e1393456 | 689 | phydev->attached_dev = NULL; |
1211ce53 | 690 | phy_suspend(phydev); |
e1393456 AF |
691 | |
692 | /* If the device had no specific driver before (i.e. - it | |
693 | * was using the generic driver), we unbind the device | |
694 | * from the generic driver so that there's a chance a | |
2f53e904 SS |
695 | * real driver could be loaded |
696 | */ | |
ab2145ed SX |
697 | for (i = 0; i < ARRAY_SIZE(genphy_driver); i++) { |
698 | if (phydev->dev.driver == &genphy_driver[i].driver) { | |
699 | device_release_driver(&phydev->dev); | |
700 | break; | |
701 | } | |
702 | } | |
e1393456 AF |
703 | } |
704 | EXPORT_SYMBOL(phy_detach); | |
705 | ||
481b5d93 SH |
706 | int phy_suspend(struct phy_device *phydev) |
707 | { | |
708 | struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver); | |
32fc3fd4 | 709 | struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; |
8a477a6f | 710 | int ret = 0; |
481b5d93 SH |
711 | |
712 | /* If the device has WOL enabled, we cannot suspend the PHY */ | |
481b5d93 SH |
713 | phy_ethtool_get_wol(phydev, &wol); |
714 | if (wol.wolopts) | |
715 | return -EBUSY; | |
716 | ||
717 | if (phydrv->suspend) | |
8a477a6f FF |
718 | ret = phydrv->suspend(phydev); |
719 | ||
720 | if (ret) | |
721 | return ret; | |
722 | ||
723 | phydev->suspended = true; | |
724 | ||
725 | return ret; | |
481b5d93 | 726 | } |
ca127697 | 727 | EXPORT_SYMBOL(phy_suspend); |
481b5d93 SH |
728 | |
729 | int phy_resume(struct phy_device *phydev) | |
730 | { | |
731 | struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver); | |
8a477a6f | 732 | int ret = 0; |
481b5d93 SH |
733 | |
734 | if (phydrv->resume) | |
8a477a6f FF |
735 | ret = phydrv->resume(phydev); |
736 | ||
737 | if (ret) | |
738 | return ret; | |
739 | ||
740 | phydev->suspended = false; | |
741 | ||
742 | return ret; | |
481b5d93 | 743 | } |
ca127697 | 744 | EXPORT_SYMBOL(phy_resume); |
e1393456 | 745 | |
00db8189 AF |
746 | /* Generic PHY support and helper functions */ |
747 | ||
b3df0da8 | 748 | /** |
25985edc | 749 | * genphy_config_advert - sanitize and advertise auto-negotiation parameters |
b3df0da8 | 750 | * @phydev: target phy_device struct |
00db8189 | 751 | * |
b3df0da8 | 752 | * Description: Writes MII_ADVERTISE with the appropriate values, |
00db8189 | 753 | * after sanitizing the values to make sure we only advertise |
51e2a384 TP |
754 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
755 | * hasn't changed, and > 0 if it has changed. | |
00db8189 | 756 | */ |
89ff05ec | 757 | static int genphy_config_advert(struct phy_device *phydev) |
00db8189 AF |
758 | { |
759 | u32 advertise; | |
5273e3a5 | 760 | int oldadv, adv, bmsr; |
51e2a384 | 761 | int err, changed = 0; |
00db8189 | 762 | |
2f53e904 | 763 | /* Only allow advertising what this PHY supports */ |
00db8189 AF |
764 | phydev->advertising &= phydev->supported; |
765 | advertise = phydev->advertising; | |
766 | ||
767 | /* Setup standard advertisement */ | |
2f53e904 | 768 | adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
769 | if (adv < 0) |
770 | return adv; | |
771 | ||
2f53e904 | 772 | oldadv = adv; |
28011cf1 | 773 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | |
00db8189 | 774 | ADVERTISE_PAUSE_ASYM); |
37f07023 | 775 | adv |= ethtool_adv_to_mii_adv_t(advertise); |
00db8189 | 776 | |
51e2a384 TP |
777 | if (adv != oldadv) { |
778 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
00db8189 | 779 | |
51e2a384 TP |
780 | if (err < 0) |
781 | return err; | |
782 | changed = 1; | |
783 | } | |
00db8189 | 784 | |
5273e3a5 FF |
785 | bmsr = phy_read(phydev, MII_BMSR); |
786 | if (bmsr < 0) | |
787 | return bmsr; | |
788 | ||
789 | /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all | |
790 | * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a | |
791 | * logical 1. | |
792 | */ | |
793 | if (!(bmsr & BMSR_ESTATEN)) | |
794 | return changed; | |
795 | ||
00db8189 | 796 | /* Configure gigabit if it's supported */ |
5273e3a5 FF |
797 | adv = phy_read(phydev, MII_CTRL1000); |
798 | if (adv < 0) | |
799 | return adv; | |
800 | ||
801 | oldadv = adv; | |
802 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); | |
803 | ||
00db8189 | 804 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
2f53e904 | 805 | SUPPORTED_1000baseT_Full)) { |
37f07023 | 806 | adv |= ethtool_adv_to_mii_ctrl1000_t(advertise); |
00db8189 AF |
807 | } |
808 | ||
eb686231 M |
809 | if (adv != oldadv) |
810 | changed = 1; | |
811 | ||
5273e3a5 FF |
812 | err = phy_write(phydev, MII_CTRL1000, adv); |
813 | if (err < 0) | |
814 | return err; | |
815 | ||
51e2a384 | 816 | return changed; |
00db8189 | 817 | } |
00db8189 | 818 | |
b3df0da8 RD |
819 | /** |
820 | * genphy_setup_forced - configures/forces speed/duplex from @phydev | |
821 | * @phydev: target phy_device struct | |
00db8189 | 822 | * |
b3df0da8 | 823 | * Description: Configures MII_BMCR to force speed/duplex |
00db8189 | 824 | * to the values in phydev. Assumes that the values are valid. |
b3df0da8 RD |
825 | * Please see phy_sanitize_settings(). |
826 | */ | |
3fb69bca | 827 | int genphy_setup_forced(struct phy_device *phydev) |
00db8189 | 828 | { |
bc1e0a09 | 829 | int ctl = 0; |
00db8189 | 830 | |
2f53e904 SS |
831 | phydev->pause = 0; |
832 | phydev->asym_pause = 0; | |
00db8189 AF |
833 | |
834 | if (SPEED_1000 == phydev->speed) | |
835 | ctl |= BMCR_SPEED1000; | |
836 | else if (SPEED_100 == phydev->speed) | |
837 | ctl |= BMCR_SPEED100; | |
838 | ||
839 | if (DUPLEX_FULL == phydev->duplex) | |
840 | ctl |= BMCR_FULLDPLX; | |
e109374f | 841 | |
e62a768f | 842 | return phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 843 | } |
3fb69bca | 844 | EXPORT_SYMBOL(genphy_setup_forced); |
00db8189 | 845 | |
b3df0da8 RD |
846 | /** |
847 | * genphy_restart_aneg - Enable and Restart Autonegotiation | |
848 | * @phydev: target phy_device struct | |
849 | */ | |
00db8189 AF |
850 | int genphy_restart_aneg(struct phy_device *phydev) |
851 | { | |
553fe92b | 852 | int ctl = phy_read(phydev, MII_BMCR); |
00db8189 AF |
853 | |
854 | if (ctl < 0) | |
855 | return ctl; | |
856 | ||
2f53e904 | 857 | ctl |= BMCR_ANENABLE | BMCR_ANRESTART; |
00db8189 AF |
858 | |
859 | /* Don't isolate the PHY if we're negotiating */ | |
2f53e904 | 860 | ctl &= ~BMCR_ISOLATE; |
00db8189 | 861 | |
553fe92b | 862 | return phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 863 | } |
892871dc | 864 | EXPORT_SYMBOL(genphy_restart_aneg); |
00db8189 | 865 | |
b3df0da8 RD |
866 | /** |
867 | * genphy_config_aneg - restart auto-negotiation or write BMCR | |
868 | * @phydev: target phy_device struct | |
00db8189 | 869 | * |
b3df0da8 | 870 | * Description: If auto-negotiation is enabled, we configure the |
00db8189 | 871 | * advertising, and then restart auto-negotiation. If it is not |
b3df0da8 | 872 | * enabled, then we write the BMCR. |
00db8189 AF |
873 | */ |
874 | int genphy_config_aneg(struct phy_device *phydev) | |
875 | { | |
de339c2a | 876 | int result; |
00db8189 | 877 | |
de339c2a TP |
878 | if (AUTONEG_ENABLE != phydev->autoneg) |
879 | return genphy_setup_forced(phydev); | |
00db8189 | 880 | |
de339c2a | 881 | result = genphy_config_advert(phydev); |
de339c2a TP |
882 | if (result < 0) /* error */ |
883 | return result; | |
de339c2a | 884 | if (result == 0) { |
25985edc | 885 | /* Advertisement hasn't changed, but maybe aneg was never on to |
2f53e904 SS |
886 | * begin with? Or maybe phy was isolated? |
887 | */ | |
de339c2a TP |
888 | int ctl = phy_read(phydev, MII_BMCR); |
889 | ||
890 | if (ctl < 0) | |
891 | return ctl; | |
892 | ||
893 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) | |
894 | result = 1; /* do restart aneg */ | |
895 | } | |
896 | ||
897 | /* Only restart aneg if we are advertising something different | |
2f53e904 SS |
898 | * than we were before. |
899 | */ | |
de339c2a TP |
900 | if (result > 0) |
901 | result = genphy_restart_aneg(phydev); | |
00db8189 | 902 | |
51e2a384 | 903 | return result; |
00db8189 AF |
904 | } |
905 | EXPORT_SYMBOL(genphy_config_aneg); | |
906 | ||
a9fa6e6a FF |
907 | /** |
908 | * genphy_aneg_done - return auto-negotiation status | |
909 | * @phydev: target phy_device struct | |
910 | * | |
911 | * Description: Reads the status register and returns 0 either if | |
912 | * auto-negotiation is incomplete, or if there was an error. | |
913 | * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. | |
914 | */ | |
915 | int genphy_aneg_done(struct phy_device *phydev) | |
916 | { | |
917 | int retval = phy_read(phydev, MII_BMSR); | |
918 | ||
919 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); | |
920 | } | |
921 | EXPORT_SYMBOL(genphy_aneg_done); | |
922 | ||
395056ed | 923 | static int gen10g_config_aneg(struct phy_device *phydev) |
124059fd AF |
924 | { |
925 | return 0; | |
926 | } | |
124059fd | 927 | |
b3df0da8 RD |
928 | /** |
929 | * genphy_update_link - update link status in @phydev | |
930 | * @phydev: target phy_device struct | |
00db8189 | 931 | * |
b3df0da8 | 932 | * Description: Update the value in phydev->link to reflect the |
00db8189 | 933 | * current link value. In order to do this, we need to read |
b3df0da8 | 934 | * the status register twice, keeping the second value. |
00db8189 AF |
935 | */ |
936 | int genphy_update_link(struct phy_device *phydev) | |
937 | { | |
938 | int status; | |
939 | ||
940 | /* Do a fake read */ | |
941 | status = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
942 | if (status < 0) |
943 | return status; | |
944 | ||
945 | /* Read link and autonegotiation status */ | |
946 | status = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
947 | if (status < 0) |
948 | return status; | |
949 | ||
950 | if ((status & BMSR_LSTATUS) == 0) | |
951 | phydev->link = 0; | |
952 | else | |
953 | phydev->link = 1; | |
954 | ||
955 | return 0; | |
956 | } | |
6b655529 | 957 | EXPORT_SYMBOL(genphy_update_link); |
00db8189 | 958 | |
b3df0da8 RD |
959 | /** |
960 | * genphy_read_status - check the link status and update current link state | |
961 | * @phydev: target phy_device struct | |
00db8189 | 962 | * |
b3df0da8 | 963 | * Description: Check the link, then figure out the current state |
00db8189 AF |
964 | * by comparing what we advertise with what the link partner |
965 | * advertises. Start by checking the gigabit possibilities, | |
966 | * then move on to 10/100. | |
967 | */ | |
968 | int genphy_read_status(struct phy_device *phydev) | |
969 | { | |
970 | int adv; | |
971 | int err; | |
972 | int lpa; | |
973 | int lpagb = 0; | |
a4572e0c CB |
974 | int common_adv; |
975 | int common_adv_gb = 0; | |
00db8189 | 976 | |
2f53e904 | 977 | /* Update the link, but return if there was an error */ |
00db8189 AF |
978 | err = genphy_update_link(phydev); |
979 | if (err) | |
980 | return err; | |
981 | ||
114002bc FF |
982 | phydev->lp_advertising = 0; |
983 | ||
00db8189 AF |
984 | if (AUTONEG_ENABLE == phydev->autoneg) { |
985 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
986 | | SUPPORTED_1000baseT_Full)) { | |
987 | lpagb = phy_read(phydev, MII_STAT1000); | |
00db8189 AF |
988 | if (lpagb < 0) |
989 | return lpagb; | |
990 | ||
991 | adv = phy_read(phydev, MII_CTRL1000); | |
00db8189 AF |
992 | if (adv < 0) |
993 | return adv; | |
994 | ||
114002bc FF |
995 | phydev->lp_advertising = |
996 | mii_stat1000_to_ethtool_lpa_t(lpagb); | |
a4572e0c | 997 | common_adv_gb = lpagb & adv << 2; |
00db8189 AF |
998 | } |
999 | ||
1000 | lpa = phy_read(phydev, MII_LPA); | |
00db8189 AF |
1001 | if (lpa < 0) |
1002 | return lpa; | |
1003 | ||
114002bc FF |
1004 | phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa); |
1005 | ||
00db8189 | 1006 | adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
1007 | if (adv < 0) |
1008 | return adv; | |
1009 | ||
a4572e0c | 1010 | common_adv = lpa & adv; |
00db8189 AF |
1011 | |
1012 | phydev->speed = SPEED_10; | |
1013 | phydev->duplex = DUPLEX_HALF; | |
2f53e904 SS |
1014 | phydev->pause = 0; |
1015 | phydev->asym_pause = 0; | |
00db8189 | 1016 | |
a4572e0c | 1017 | if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) { |
00db8189 AF |
1018 | phydev->speed = SPEED_1000; |
1019 | ||
a4572e0c | 1020 | if (common_adv_gb & LPA_1000FULL) |
00db8189 | 1021 | phydev->duplex = DUPLEX_FULL; |
a4572e0c | 1022 | } else if (common_adv & (LPA_100FULL | LPA_100HALF)) { |
00db8189 | 1023 | phydev->speed = SPEED_100; |
e109374f | 1024 | |
a4572e0c | 1025 | if (common_adv & LPA_100FULL) |
00db8189 AF |
1026 | phydev->duplex = DUPLEX_FULL; |
1027 | } else | |
a4572e0c | 1028 | if (common_adv & LPA_10FULL) |
00db8189 AF |
1029 | phydev->duplex = DUPLEX_FULL; |
1030 | ||
e109374f | 1031 | if (phydev->duplex == DUPLEX_FULL) { |
00db8189 AF |
1032 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; |
1033 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
1034 | } | |
1035 | } else { | |
1036 | int bmcr = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1037 | |
00db8189 AF |
1038 | if (bmcr < 0) |
1039 | return bmcr; | |
1040 | ||
1041 | if (bmcr & BMCR_FULLDPLX) | |
1042 | phydev->duplex = DUPLEX_FULL; | |
1043 | else | |
1044 | phydev->duplex = DUPLEX_HALF; | |
1045 | ||
1046 | if (bmcr & BMCR_SPEED1000) | |
1047 | phydev->speed = SPEED_1000; | |
1048 | else if (bmcr & BMCR_SPEED100) | |
1049 | phydev->speed = SPEED_100; | |
1050 | else | |
1051 | phydev->speed = SPEED_10; | |
1052 | ||
2f53e904 SS |
1053 | phydev->pause = 0; |
1054 | phydev->asym_pause = 0; | |
00db8189 AF |
1055 | } |
1056 | ||
1057 | return 0; | |
1058 | } | |
1059 | EXPORT_SYMBOL(genphy_read_status); | |
1060 | ||
395056ed | 1061 | static int gen10g_read_status(struct phy_device *phydev) |
124059fd AF |
1062 | { |
1063 | int devad, reg; | |
1064 | u32 mmd_mask = phydev->c45_ids.devices_in_package; | |
1065 | ||
1066 | phydev->link = 1; | |
1067 | ||
1068 | /* For now just lie and say it's 10G all the time */ | |
1069 | phydev->speed = SPEED_10000; | |
1070 | phydev->duplex = DUPLEX_FULL; | |
1071 | ||
1072 | for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) { | |
1073 | if (!(mmd_mask & 1)) | |
1074 | continue; | |
1075 | ||
1076 | /* Read twice because link state is latched and a | |
1077 | * read moves the current state into the register | |
1078 | */ | |
1079 | phy_read_mmd(phydev, devad, MDIO_STAT1); | |
1080 | reg = phy_read_mmd(phydev, devad, MDIO_STAT1); | |
1081 | if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS)) | |
1082 | phydev->link = 0; | |
1083 | } | |
1084 | ||
1085 | return 0; | |
1086 | } | |
124059fd | 1087 | |
797ac071 FF |
1088 | /** |
1089 | * genphy_soft_reset - software reset the PHY via BMCR_RESET bit | |
1090 | * @phydev: target phy_device struct | |
1091 | * | |
1092 | * Description: Perform a software PHY reset using the standard | |
1093 | * BMCR_RESET bit and poll for the reset bit to be cleared. | |
1094 | * | |
1095 | * Returns: 0 on success, < 0 on failure | |
1096 | */ | |
1097 | int genphy_soft_reset(struct phy_device *phydev) | |
1098 | { | |
1099 | int ret; | |
1100 | ||
1101 | ret = phy_write(phydev, MII_BMCR, BMCR_RESET); | |
1102 | if (ret < 0) | |
1103 | return ret; | |
1104 | ||
1105 | return phy_poll_reset(phydev); | |
1106 | } | |
1107 | EXPORT_SYMBOL(genphy_soft_reset); | |
1108 | ||
af6b6967 | 1109 | int genphy_config_init(struct phy_device *phydev) |
00db8189 | 1110 | { |
84c22d79 | 1111 | int val; |
00db8189 AF |
1112 | u32 features; |
1113 | ||
00db8189 AF |
1114 | features = (SUPPORTED_TP | SUPPORTED_MII |
1115 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
1116 | SUPPORTED_BNC); | |
1117 | ||
1118 | /* Do we support autonegotiation? */ | |
1119 | val = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
1120 | if (val < 0) |
1121 | return val; | |
1122 | ||
1123 | if (val & BMSR_ANEGCAPABLE) | |
1124 | features |= SUPPORTED_Autoneg; | |
1125 | ||
1126 | if (val & BMSR_100FULL) | |
1127 | features |= SUPPORTED_100baseT_Full; | |
1128 | if (val & BMSR_100HALF) | |
1129 | features |= SUPPORTED_100baseT_Half; | |
1130 | if (val & BMSR_10FULL) | |
1131 | features |= SUPPORTED_10baseT_Full; | |
1132 | if (val & BMSR_10HALF) | |
1133 | features |= SUPPORTED_10baseT_Half; | |
1134 | ||
1135 | if (val & BMSR_ESTATEN) { | |
1136 | val = phy_read(phydev, MII_ESTATUS); | |
00db8189 AF |
1137 | if (val < 0) |
1138 | return val; | |
1139 | ||
1140 | if (val & ESTATUS_1000_TFULL) | |
1141 | features |= SUPPORTED_1000baseT_Full; | |
1142 | if (val & ESTATUS_1000_THALF) | |
1143 | features |= SUPPORTED_1000baseT_Half; | |
1144 | } | |
1145 | ||
c242a472 SH |
1146 | phydev->supported &= features; |
1147 | phydev->advertising &= features; | |
00db8189 AF |
1148 | |
1149 | return 0; | |
1150 | } | |
124059fd | 1151 | |
9df81dd7 FF |
1152 | static int gen10g_soft_reset(struct phy_device *phydev) |
1153 | { | |
1154 | /* Do nothing for now */ | |
1155 | return 0; | |
1156 | } | |
af6b6967 | 1157 | EXPORT_SYMBOL(genphy_config_init); |
9df81dd7 | 1158 | |
124059fd AF |
1159 | static int gen10g_config_init(struct phy_device *phydev) |
1160 | { | |
1161 | /* Temporarily just say we support everything */ | |
1162 | phydev->supported = SUPPORTED_10000baseT_Full; | |
1163 | phydev->advertising = SUPPORTED_10000baseT_Full; | |
1164 | ||
1165 | return 0; | |
1166 | } | |
1167 | ||
0f0ca340 GC |
1168 | int genphy_suspend(struct phy_device *phydev) |
1169 | { | |
1170 | int value; | |
1171 | ||
1172 | mutex_lock(&phydev->lock); | |
1173 | ||
1174 | value = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1175 | phy_write(phydev, MII_BMCR, value | BMCR_PDOWN); |
0f0ca340 GC |
1176 | |
1177 | mutex_unlock(&phydev->lock); | |
1178 | ||
1179 | return 0; | |
1180 | } | |
1181 | EXPORT_SYMBOL(genphy_suspend); | |
00db8189 | 1182 | |
395056ed | 1183 | static int gen10g_suspend(struct phy_device *phydev) |
124059fd AF |
1184 | { |
1185 | return 0; | |
1186 | } | |
124059fd | 1187 | |
0f0ca340 GC |
1188 | int genphy_resume(struct phy_device *phydev) |
1189 | { | |
1190 | int value; | |
1191 | ||
1192 | mutex_lock(&phydev->lock); | |
1193 | ||
1194 | value = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1195 | phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN); |
0f0ca340 GC |
1196 | |
1197 | mutex_unlock(&phydev->lock); | |
1198 | ||
1199 | return 0; | |
1200 | } | |
1201 | EXPORT_SYMBOL(genphy_resume); | |
00db8189 | 1202 | |
395056ed | 1203 | static int gen10g_resume(struct phy_device *phydev) |
124059fd AF |
1204 | { |
1205 | return 0; | |
1206 | } | |
124059fd | 1207 | |
de906af1 SH |
1208 | static void of_set_phy_supported(struct phy_device *phydev) |
1209 | { | |
1210 | struct device_node *node = phydev->dev.of_node; | |
1211 | u32 max_speed; | |
1212 | ||
1213 | if (!IS_ENABLED(CONFIG_OF_MDIO)) | |
1214 | return; | |
1215 | ||
1216 | if (!node) | |
1217 | return; | |
1218 | ||
1219 | if (!of_property_read_u32(node, "max-speed", &max_speed)) { | |
1220 | /* The default values for phydev->supported are provided by the PHY | |
1221 | * driver "features" member, we want to reset to sane defaults fist | |
1222 | * before supporting higher speeds. | |
1223 | */ | |
1224 | phydev->supported &= PHY_DEFAULT_FEATURES; | |
1225 | ||
1226 | switch (max_speed) { | |
1227 | default: | |
1228 | return; | |
1229 | ||
1230 | case SPEED_1000: | |
1231 | phydev->supported |= PHY_1000BT_FEATURES; | |
1232 | case SPEED_100: | |
1233 | phydev->supported |= PHY_100BT_FEATURES; | |
1234 | case SPEED_10: | |
1235 | phydev->supported |= PHY_10BT_FEATURES; | |
1236 | } | |
1237 | } | |
1238 | } | |
1239 | ||
b3df0da8 RD |
1240 | /** |
1241 | * phy_probe - probe and init a PHY device | |
1242 | * @dev: device to probe and init | |
00db8189 | 1243 | * |
b3df0da8 | 1244 | * Description: Take care of setting up the phy_device structure, |
00db8189 AF |
1245 | * set the state to READY (the driver's init function should |
1246 | * set it to STARTING if needed). | |
1247 | */ | |
1248 | static int phy_probe(struct device *dev) | |
1249 | { | |
553fe92b SS |
1250 | struct phy_device *phydev = to_phy_device(dev); |
1251 | struct device_driver *drv = phydev->dev.driver; | |
1252 | struct phy_driver *phydrv = to_phy_driver(drv); | |
00db8189 AF |
1253 | int err = 0; |
1254 | ||
00db8189 AF |
1255 | phydev->drv = phydrv; |
1256 | ||
2c7b4921 FF |
1257 | /* Disable the interrupt if the PHY doesn't support it |
1258 | * but the interrupt is still a valid one | |
1259 | */ | |
1260 | if (!(phydrv->flags & PHY_HAS_INTERRUPT) && | |
2f53e904 | 1261 | phy_interrupt_is_valid(phydev)) |
00db8189 AF |
1262 | phydev->irq = PHY_POLL; |
1263 | ||
4284b6a5 FF |
1264 | if (phydrv->flags & PHY_IS_INTERNAL) |
1265 | phydev->is_internal = true; | |
1266 | ||
35b5f6b1 | 1267 | mutex_lock(&phydev->lock); |
00db8189 AF |
1268 | |
1269 | /* Start out supporting everything. Eventually, | |
1270 | * a controller will attach, and may modify one | |
2f53e904 SS |
1271 | * or both of these values |
1272 | */ | |
00db8189 | 1273 | phydev->supported = phydrv->features; |
de906af1 SH |
1274 | of_set_phy_supported(phydev); |
1275 | phydev->advertising = phydev->supported; | |
00db8189 AF |
1276 | |
1277 | /* Set the state to READY by default */ | |
1278 | phydev->state = PHY_READY; | |
1279 | ||
1280 | if (phydev->drv->probe) | |
1281 | err = phydev->drv->probe(phydev); | |
1282 | ||
35b5f6b1 | 1283 | mutex_unlock(&phydev->lock); |
00db8189 | 1284 | |
00db8189 AF |
1285 | return err; |
1286 | } | |
1287 | ||
1288 | static int phy_remove(struct device *dev) | |
1289 | { | |
553fe92b | 1290 | struct phy_device *phydev = to_phy_device(dev); |
00db8189 | 1291 | |
35b5f6b1 | 1292 | mutex_lock(&phydev->lock); |
00db8189 | 1293 | phydev->state = PHY_DOWN; |
35b5f6b1 | 1294 | mutex_unlock(&phydev->lock); |
00db8189 AF |
1295 | |
1296 | if (phydev->drv->remove) | |
1297 | phydev->drv->remove(phydev); | |
00db8189 AF |
1298 | phydev->drv = NULL; |
1299 | ||
1300 | return 0; | |
1301 | } | |
1302 | ||
b3df0da8 RD |
1303 | /** |
1304 | * phy_driver_register - register a phy_driver with the PHY layer | |
1305 | * @new_driver: new phy_driver to register | |
1306 | */ | |
00db8189 AF |
1307 | int phy_driver_register(struct phy_driver *new_driver) |
1308 | { | |
1309 | int retval; | |
1310 | ||
00db8189 AF |
1311 | new_driver->driver.name = new_driver->name; |
1312 | new_driver->driver.bus = &mdio_bus_type; | |
1313 | new_driver->driver.probe = phy_probe; | |
1314 | new_driver->driver.remove = phy_remove; | |
1315 | ||
1316 | retval = driver_register(&new_driver->driver); | |
00db8189 | 1317 | if (retval) { |
8d242488 JP |
1318 | pr_err("%s: Error %d in registering driver\n", |
1319 | new_driver->name, retval); | |
00db8189 AF |
1320 | |
1321 | return retval; | |
1322 | } | |
1323 | ||
f2511f13 | 1324 | pr_debug("%s: Registered new driver\n", new_driver->name); |
00db8189 AF |
1325 | |
1326 | return 0; | |
1327 | } | |
1328 | EXPORT_SYMBOL(phy_driver_register); | |
1329 | ||
d5bf9071 CH |
1330 | int phy_drivers_register(struct phy_driver *new_driver, int n) |
1331 | { | |
1332 | int i, ret = 0; | |
1333 | ||
1334 | for (i = 0; i < n; i++) { | |
1335 | ret = phy_driver_register(new_driver + i); | |
1336 | if (ret) { | |
1337 | while (i-- > 0) | |
1338 | phy_driver_unregister(new_driver + i); | |
1339 | break; | |
1340 | } | |
1341 | } | |
1342 | return ret; | |
1343 | } | |
1344 | EXPORT_SYMBOL(phy_drivers_register); | |
1345 | ||
00db8189 AF |
1346 | void phy_driver_unregister(struct phy_driver *drv) |
1347 | { | |
1348 | driver_unregister(&drv->driver); | |
1349 | } | |
1350 | EXPORT_SYMBOL(phy_driver_unregister); | |
1351 | ||
d5bf9071 CH |
1352 | void phy_drivers_unregister(struct phy_driver *drv, int n) |
1353 | { | |
1354 | int i; | |
2f53e904 SS |
1355 | |
1356 | for (i = 0; i < n; i++) | |
d5bf9071 | 1357 | phy_driver_unregister(drv + i); |
d5bf9071 CH |
1358 | } |
1359 | EXPORT_SYMBOL(phy_drivers_unregister); | |
1360 | ||
ab2145ed SX |
1361 | static struct phy_driver genphy_driver[] = { |
1362 | { | |
e1393456 AF |
1363 | .phy_id = 0xffffffff, |
1364 | .phy_id_mask = 0xffffffff, | |
1365 | .name = "Generic PHY", | |
9df81dd7 | 1366 | .soft_reset = genphy_soft_reset, |
e1393456 | 1367 | .config_init = genphy_config_init, |
c242a472 SH |
1368 | .features = PHY_GBIT_FEATURES | SUPPORTED_MII | |
1369 | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
1370 | SUPPORTED_BNC, | |
e1393456 | 1371 | .config_aneg = genphy_config_aneg, |
76a423a3 | 1372 | .aneg_done = genphy_aneg_done, |
e1393456 | 1373 | .read_status = genphy_read_status, |
0f0ca340 GC |
1374 | .suspend = genphy_suspend, |
1375 | .resume = genphy_resume, | |
e109374f | 1376 | .driver = { .owner = THIS_MODULE, }, |
124059fd AF |
1377 | }, { |
1378 | .phy_id = 0xffffffff, | |
1379 | .phy_id_mask = 0xffffffff, | |
1380 | .name = "Generic 10G PHY", | |
9df81dd7 | 1381 | .soft_reset = gen10g_soft_reset, |
124059fd AF |
1382 | .config_init = gen10g_config_init, |
1383 | .features = 0, | |
1384 | .config_aneg = gen10g_config_aneg, | |
1385 | .read_status = gen10g_read_status, | |
1386 | .suspend = gen10g_suspend, | |
1387 | .resume = gen10g_resume, | |
1388 | .driver = {.owner = THIS_MODULE, }, | |
ab2145ed | 1389 | } }; |
00db8189 | 1390 | |
67c4f3fa | 1391 | static int __init phy_init(void) |
00db8189 | 1392 | { |
67c4f3fa | 1393 | int rc; |
67c4f3fa JG |
1394 | |
1395 | rc = mdio_bus_init(); | |
1396 | if (rc) | |
e1393456 | 1397 | return rc; |
00db8189 | 1398 | |
ab2145ed SX |
1399 | rc = phy_drivers_register(genphy_driver, |
1400 | ARRAY_SIZE(genphy_driver)); | |
e1393456 AF |
1401 | if (rc) |
1402 | mdio_bus_exit(); | |
67c4f3fa | 1403 | |
67c4f3fa | 1404 | return rc; |
00db8189 AF |
1405 | } |
1406 | ||
67c4f3fa | 1407 | static void __exit phy_exit(void) |
00db8189 | 1408 | { |
ab2145ed SX |
1409 | phy_drivers_unregister(genphy_driver, |
1410 | ARRAY_SIZE(genphy_driver)); | |
e1393456 | 1411 | mdio_bus_exit(); |
00db8189 AF |
1412 | } |
1413 | ||
e1393456 | 1414 | subsys_initcall(phy_init); |
67c4f3fa | 1415 | module_exit(phy_exit); |