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1 | /* Framework for finding and configuring PHYs. | |
2 | * Also contains generic PHY driver | |
3 | * | |
4 | * Author: Andy Fleming | |
5 | * | |
6 | * Copyright (c) 2004 Freescale Semiconductor, Inc. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | */ | |
14 | ||
15 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/string.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/unistd.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/delay.h> | |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/etherdevice.h> | |
27 | #include <linux/skbuff.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/mii.h> | |
31 | #include <linux/ethtool.h> | |
32 | #include <linux/phy.h> | |
33 | #include <linux/mdio.h> | |
34 | #include <linux/io.h> | |
35 | #include <linux/uaccess.h> | |
36 | ||
37 | #include <asm/irq.h> | |
38 | ||
39 | MODULE_DESCRIPTION("PHY library"); | |
40 | MODULE_AUTHOR("Andy Fleming"); | |
41 | MODULE_LICENSE("GPL"); | |
42 | ||
43 | void phy_device_free(struct phy_device *phydev) | |
44 | { | |
45 | put_device(&phydev->dev); | |
46 | } | |
47 | EXPORT_SYMBOL(phy_device_free); | |
48 | ||
49 | static void phy_device_release(struct device *dev) | |
50 | { | |
51 | kfree(to_phy_device(dev)); | |
52 | } | |
53 | ||
54 | enum genphy_driver { | |
55 | GENPHY_DRV_1G, | |
56 | GENPHY_DRV_10G, | |
57 | GENPHY_DRV_MAX | |
58 | }; | |
59 | ||
60 | static struct phy_driver genphy_driver[GENPHY_DRV_MAX]; | |
61 | ||
62 | static LIST_HEAD(phy_fixup_list); | |
63 | static DEFINE_MUTEX(phy_fixup_lock); | |
64 | ||
65 | /** | |
66 | * phy_register_fixup - creates a new phy_fixup and adds it to the list | |
67 | * @bus_id: A string which matches phydev->dev.bus_id (or PHY_ANY_ID) | |
68 | * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) | |
69 | * It can also be PHY_ANY_UID | |
70 | * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before | |
71 | * comparison | |
72 | * @run: The actual code to be run when a matching PHY is found | |
73 | */ | |
74 | int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, | |
75 | int (*run)(struct phy_device *)) | |
76 | { | |
77 | struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); | |
78 | ||
79 | if (!fixup) | |
80 | return -ENOMEM; | |
81 | ||
82 | strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); | |
83 | fixup->phy_uid = phy_uid; | |
84 | fixup->phy_uid_mask = phy_uid_mask; | |
85 | fixup->run = run; | |
86 | ||
87 | mutex_lock(&phy_fixup_lock); | |
88 | list_add_tail(&fixup->list, &phy_fixup_list); | |
89 | mutex_unlock(&phy_fixup_lock); | |
90 | ||
91 | return 0; | |
92 | } | |
93 | EXPORT_SYMBOL(phy_register_fixup); | |
94 | ||
95 | /* Registers a fixup to be run on any PHY with the UID in phy_uid */ | |
96 | int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, | |
97 | int (*run)(struct phy_device *)) | |
98 | { | |
99 | return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); | |
100 | } | |
101 | EXPORT_SYMBOL(phy_register_fixup_for_uid); | |
102 | ||
103 | /* Registers a fixup to be run on the PHY with id string bus_id */ | |
104 | int phy_register_fixup_for_id(const char *bus_id, | |
105 | int (*run)(struct phy_device *)) | |
106 | { | |
107 | return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); | |
108 | } | |
109 | EXPORT_SYMBOL(phy_register_fixup_for_id); | |
110 | ||
111 | /* Returns 1 if fixup matches phydev in bus_id and phy_uid. | |
112 | * Fixups can be set to match any in one or more fields. | |
113 | */ | |
114 | static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) | |
115 | { | |
116 | if (strcmp(fixup->bus_id, dev_name(&phydev->dev)) != 0) | |
117 | if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) | |
118 | return 0; | |
119 | ||
120 | if ((fixup->phy_uid & fixup->phy_uid_mask) != | |
121 | (phydev->phy_id & fixup->phy_uid_mask)) | |
122 | if (fixup->phy_uid != PHY_ANY_UID) | |
123 | return 0; | |
124 | ||
125 | return 1; | |
126 | } | |
127 | ||
128 | /* Runs any matching fixups for this phydev */ | |
129 | static int phy_scan_fixups(struct phy_device *phydev) | |
130 | { | |
131 | struct phy_fixup *fixup; | |
132 | ||
133 | mutex_lock(&phy_fixup_lock); | |
134 | list_for_each_entry(fixup, &phy_fixup_list, list) { | |
135 | if (phy_needs_fixup(phydev, fixup)) { | |
136 | int err = fixup->run(phydev); | |
137 | ||
138 | if (err < 0) { | |
139 | mutex_unlock(&phy_fixup_lock); | |
140 | return err; | |
141 | } | |
142 | phydev->has_fixups = true; | |
143 | } | |
144 | } | |
145 | mutex_unlock(&phy_fixup_lock); | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id, | |
151 | bool is_c45, | |
152 | struct phy_c45_device_ids *c45_ids) | |
153 | { | |
154 | struct phy_device *dev; | |
155 | ||
156 | /* We allocate the device, and initialize the default values */ | |
157 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
158 | if (NULL == dev) | |
159 | return (struct phy_device *)PTR_ERR((void *)-ENOMEM); | |
160 | ||
161 | dev->dev.release = phy_device_release; | |
162 | ||
163 | dev->speed = 0; | |
164 | dev->duplex = -1; | |
165 | dev->pause = 0; | |
166 | dev->asym_pause = 0; | |
167 | dev->link = 1; | |
168 | dev->interface = PHY_INTERFACE_MODE_GMII; | |
169 | ||
170 | dev->autoneg = AUTONEG_ENABLE; | |
171 | ||
172 | dev->is_c45 = is_c45; | |
173 | dev->addr = addr; | |
174 | dev->phy_id = phy_id; | |
175 | if (c45_ids) | |
176 | dev->c45_ids = *c45_ids; | |
177 | dev->bus = bus; | |
178 | dev->dev.parent = bus->parent; | |
179 | dev->dev.bus = &mdio_bus_type; | |
180 | dev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL; | |
181 | dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr); | |
182 | ||
183 | dev->state = PHY_DOWN; | |
184 | ||
185 | mutex_init(&dev->lock); | |
186 | INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); | |
187 | INIT_WORK(&dev->phy_queue, phy_change); | |
188 | ||
189 | /* Request the appropriate module unconditionally; don't | |
190 | * bother trying to do so only if it isn't already loaded, | |
191 | * because that gets complicated. A hotplug event would have | |
192 | * done an unconditional modprobe anyway. | |
193 | * We don't do normal hotplug because it won't work for MDIO | |
194 | * -- because it relies on the device staying around for long | |
195 | * enough for the driver to get loaded. With MDIO, the NIC | |
196 | * driver will get bored and give up as soon as it finds that | |
197 | * there's no driver _already_ loaded. | |
198 | */ | |
199 | request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id)); | |
200 | ||
201 | device_initialize(&dev->dev); | |
202 | ||
203 | return dev; | |
204 | } | |
205 | EXPORT_SYMBOL(phy_device_create); | |
206 | ||
207 | /** | |
208 | * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. | |
209 | * @bus: the target MII bus | |
210 | * @addr: PHY address on the MII bus | |
211 | * @phy_id: where to store the ID retrieved. | |
212 | * @c45_ids: where to store the c45 ID information. | |
213 | * | |
214 | * If the PHY devices-in-package appears to be valid, it and the | |
215 | * corresponding identifiers are stored in @c45_ids, zero is stored | |
216 | * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns | |
217 | * zero on success. | |
218 | * | |
219 | */ | |
220 | static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id, | |
221 | struct phy_c45_device_ids *c45_ids) { | |
222 | int phy_reg; | |
223 | int i, reg_addr; | |
224 | const int num_ids = ARRAY_SIZE(c45_ids->device_ids); | |
225 | ||
226 | /* Find first non-zero Devices In package. Device | |
227 | * zero is reserved, so don't probe it. | |
228 | */ | |
229 | for (i = 1; | |
230 | i < num_ids && c45_ids->devices_in_package == 0; | |
231 | i++) { | |
232 | reg_addr = MII_ADDR_C45 | i << 16 | 6; | |
233 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
234 | if (phy_reg < 0) | |
235 | return -EIO; | |
236 | c45_ids->devices_in_package = (phy_reg & 0xffff) << 16; | |
237 | ||
238 | reg_addr = MII_ADDR_C45 | i << 16 | 5; | |
239 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
240 | if (phy_reg < 0) | |
241 | return -EIO; | |
242 | c45_ids->devices_in_package |= (phy_reg & 0xffff); | |
243 | ||
244 | /* If mostly Fs, there is no device there, | |
245 | * let's get out of here. | |
246 | */ | |
247 | if ((c45_ids->devices_in_package & 0x1fffffff) == 0x1fffffff) { | |
248 | *phy_id = 0xffffffff; | |
249 | return 0; | |
250 | } | |
251 | } | |
252 | ||
253 | /* Now probe Device Identifiers for each device present. */ | |
254 | for (i = 1; i < num_ids; i++) { | |
255 | if (!(c45_ids->devices_in_package & (1 << i))) | |
256 | continue; | |
257 | ||
258 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1; | |
259 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
260 | if (phy_reg < 0) | |
261 | return -EIO; | |
262 | c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16; | |
263 | ||
264 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2; | |
265 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
266 | if (phy_reg < 0) | |
267 | return -EIO; | |
268 | c45_ids->device_ids[i] |= (phy_reg & 0xffff); | |
269 | } | |
270 | *phy_id = 0; | |
271 | return 0; | |
272 | } | |
273 | ||
274 | /** | |
275 | * get_phy_id - reads the specified addr for its ID. | |
276 | * @bus: the target MII bus | |
277 | * @addr: PHY address on the MII bus | |
278 | * @phy_id: where to store the ID retrieved. | |
279 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol | |
280 | * @c45_ids: where to store the c45 ID information. | |
281 | * | |
282 | * Description: In the case of a 802.3-c22 PHY, reads the ID registers | |
283 | * of the PHY at @addr on the @bus, stores it in @phy_id and returns | |
284 | * zero on success. | |
285 | * | |
286 | * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and | |
287 | * its return value is in turn returned. | |
288 | * | |
289 | */ | |
290 | static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id, | |
291 | bool is_c45, struct phy_c45_device_ids *c45_ids) | |
292 | { | |
293 | int phy_reg; | |
294 | ||
295 | if (is_c45) | |
296 | return get_phy_c45_ids(bus, addr, phy_id, c45_ids); | |
297 | ||
298 | /* Grab the bits from PHYIR1, and put them in the upper half */ | |
299 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); | |
300 | if (phy_reg < 0) | |
301 | return -EIO; | |
302 | ||
303 | *phy_id = (phy_reg & 0xffff) << 16; | |
304 | ||
305 | /* Grab the bits from PHYIR2, and put them in the lower half */ | |
306 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); | |
307 | if (phy_reg < 0) | |
308 | return -EIO; | |
309 | ||
310 | *phy_id |= (phy_reg & 0xffff); | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
315 | /** | |
316 | * get_phy_device - reads the specified PHY device and returns its @phy_device | |
317 | * struct | |
318 | * @bus: the target MII bus | |
319 | * @addr: PHY address on the MII bus | |
320 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol | |
321 | * | |
322 | * Description: Reads the ID registers of the PHY at @addr on the | |
323 | * @bus, then allocates and returns the phy_device to represent it. | |
324 | */ | |
325 | struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) | |
326 | { | |
327 | struct phy_c45_device_ids c45_ids = {0}; | |
328 | u32 phy_id = 0; | |
329 | int r; | |
330 | ||
331 | r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids); | |
332 | if (r) | |
333 | return ERR_PTR(r); | |
334 | ||
335 | /* If the phy_id is mostly Fs, there is no device there */ | |
336 | if ((phy_id & 0x1fffffff) == 0x1fffffff) | |
337 | return NULL; | |
338 | ||
339 | return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); | |
340 | } | |
341 | EXPORT_SYMBOL(get_phy_device); | |
342 | ||
343 | /** | |
344 | * phy_device_register - Register the phy device on the MDIO bus | |
345 | * @phydev: phy_device structure to be added to the MDIO bus | |
346 | */ | |
347 | int phy_device_register(struct phy_device *phydev) | |
348 | { | |
349 | int err; | |
350 | ||
351 | /* Don't register a phy if one is already registered at this address */ | |
352 | if (phydev->bus->phy_map[phydev->addr]) | |
353 | return -EINVAL; | |
354 | phydev->bus->phy_map[phydev->addr] = phydev; | |
355 | ||
356 | /* Run all of the fixups for this PHY */ | |
357 | err = phy_init_hw(phydev); | |
358 | if (err) { | |
359 | pr_err("PHY %d failed to initialize\n", phydev->addr); | |
360 | goto out; | |
361 | } | |
362 | ||
363 | err = device_add(&phydev->dev); | |
364 | if (err) { | |
365 | pr_err("PHY %d failed to add\n", phydev->addr); | |
366 | goto out; | |
367 | } | |
368 | ||
369 | return 0; | |
370 | ||
371 | out: | |
372 | phydev->bus->phy_map[phydev->addr] = NULL; | |
373 | return err; | |
374 | } | |
375 | EXPORT_SYMBOL(phy_device_register); | |
376 | ||
377 | /** | |
378 | * phy_find_first - finds the first PHY device on the bus | |
379 | * @bus: the target MII bus | |
380 | */ | |
381 | struct phy_device *phy_find_first(struct mii_bus *bus) | |
382 | { | |
383 | int addr; | |
384 | ||
385 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { | |
386 | if (bus->phy_map[addr]) | |
387 | return bus->phy_map[addr]; | |
388 | } | |
389 | return NULL; | |
390 | } | |
391 | EXPORT_SYMBOL(phy_find_first); | |
392 | ||
393 | /** | |
394 | * phy_prepare_link - prepares the PHY layer to monitor link status | |
395 | * @phydev: target phy_device struct | |
396 | * @handler: callback function for link status change notifications | |
397 | * | |
398 | * Description: Tells the PHY infrastructure to handle the | |
399 | * gory details on monitoring link status (whether through | |
400 | * polling or an interrupt), and to call back to the | |
401 | * connected device driver when the link status changes. | |
402 | * If you want to monitor your own link state, don't call | |
403 | * this function. | |
404 | */ | |
405 | static void phy_prepare_link(struct phy_device *phydev, | |
406 | void (*handler)(struct net_device *)) | |
407 | { | |
408 | phydev->adjust_link = handler; | |
409 | } | |
410 | ||
411 | /** | |
412 | * phy_connect_direct - connect an ethernet device to a specific phy_device | |
413 | * @dev: the network device to connect | |
414 | * @phydev: the pointer to the phy device | |
415 | * @handler: callback function for state change notifications | |
416 | * @interface: PHY device's interface | |
417 | */ | |
418 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, | |
419 | void (*handler)(struct net_device *), | |
420 | phy_interface_t interface) | |
421 | { | |
422 | int rc; | |
423 | ||
424 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); | |
425 | if (rc) | |
426 | return rc; | |
427 | ||
428 | phy_prepare_link(phydev, handler); | |
429 | phy_start_machine(phydev); | |
430 | if (phydev->irq > 0) | |
431 | phy_start_interrupts(phydev); | |
432 | ||
433 | return 0; | |
434 | } | |
435 | EXPORT_SYMBOL(phy_connect_direct); | |
436 | ||
437 | /** | |
438 | * phy_connect - connect an ethernet device to a PHY device | |
439 | * @dev: the network device to connect | |
440 | * @bus_id: the id string of the PHY device to connect | |
441 | * @handler: callback function for state change notifications | |
442 | * @interface: PHY device's interface | |
443 | * | |
444 | * Description: Convenience function for connecting ethernet | |
445 | * devices to PHY devices. The default behavior is for | |
446 | * the PHY infrastructure to handle everything, and only notify | |
447 | * the connected driver when the link status changes. If you | |
448 | * don't want, or can't use the provided functionality, you may | |
449 | * choose to call only the subset of functions which provide | |
450 | * the desired functionality. | |
451 | */ | |
452 | struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, | |
453 | void (*handler)(struct net_device *), | |
454 | phy_interface_t interface) | |
455 | { | |
456 | struct phy_device *phydev; | |
457 | struct device *d; | |
458 | int rc; | |
459 | ||
460 | /* Search the list of PHY devices on the mdio bus for the | |
461 | * PHY with the requested name | |
462 | */ | |
463 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); | |
464 | if (!d) { | |
465 | pr_err("PHY %s not found\n", bus_id); | |
466 | return ERR_PTR(-ENODEV); | |
467 | } | |
468 | phydev = to_phy_device(d); | |
469 | ||
470 | rc = phy_connect_direct(dev, phydev, handler, interface); | |
471 | if (rc) | |
472 | return ERR_PTR(rc); | |
473 | ||
474 | return phydev; | |
475 | } | |
476 | EXPORT_SYMBOL(phy_connect); | |
477 | ||
478 | /** | |
479 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY | |
480 | * device | |
481 | * @phydev: target phy_device struct | |
482 | */ | |
483 | void phy_disconnect(struct phy_device *phydev) | |
484 | { | |
485 | if (phydev->irq > 0) | |
486 | phy_stop_interrupts(phydev); | |
487 | ||
488 | phy_stop_machine(phydev); | |
489 | ||
490 | phydev->adjust_link = NULL; | |
491 | ||
492 | phy_detach(phydev); | |
493 | } | |
494 | EXPORT_SYMBOL(phy_disconnect); | |
495 | ||
496 | /** | |
497 | * phy_poll_reset - Safely wait until a PHY reset has properly completed | |
498 | * @phydev: The PHY device to poll | |
499 | * | |
500 | * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as | |
501 | * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR | |
502 | * register must be polled until the BMCR_RESET bit clears. | |
503 | * | |
504 | * Furthermore, any attempts to write to PHY registers may have no effect | |
505 | * or even generate MDIO bus errors until this is complete. | |
506 | * | |
507 | * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the | |
508 | * standard and do not fully reset after the BMCR_RESET bit is set, and may | |
509 | * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an | |
510 | * effort to support such broken PHYs, this function is separate from the | |
511 | * standard phy_init_hw() which will zero all the other bits in the BMCR | |
512 | * and reapply all driver-specific and board-specific fixups. | |
513 | */ | |
514 | static int phy_poll_reset(struct phy_device *phydev) | |
515 | { | |
516 | /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ | |
517 | unsigned int retries = 12; | |
518 | int ret; | |
519 | ||
520 | do { | |
521 | msleep(50); | |
522 | ret = phy_read(phydev, MII_BMCR); | |
523 | if (ret < 0) | |
524 | return ret; | |
525 | } while (ret & BMCR_RESET && --retries); | |
526 | if (ret & BMCR_RESET) | |
527 | return -ETIMEDOUT; | |
528 | ||
529 | /* Some chips (smsc911x) may still need up to another 1ms after the | |
530 | * BMCR_RESET bit is cleared before they are usable. | |
531 | */ | |
532 | msleep(1); | |
533 | return 0; | |
534 | } | |
535 | ||
536 | int phy_init_hw(struct phy_device *phydev) | |
537 | { | |
538 | int ret = 0; | |
539 | ||
540 | if (!phydev->drv || !phydev->drv->config_init) | |
541 | return 0; | |
542 | ||
543 | if (phydev->drv->soft_reset) | |
544 | ret = phydev->drv->soft_reset(phydev); | |
545 | else | |
546 | ret = genphy_soft_reset(phydev); | |
547 | ||
548 | if (ret < 0) | |
549 | return ret; | |
550 | ||
551 | ret = phy_scan_fixups(phydev); | |
552 | if (ret < 0) | |
553 | return ret; | |
554 | ||
555 | return phydev->drv->config_init(phydev); | |
556 | } | |
557 | EXPORT_SYMBOL(phy_init_hw); | |
558 | ||
559 | /** | |
560 | * phy_attach_direct - attach a network device to a given PHY device pointer | |
561 | * @dev: network device to attach | |
562 | * @phydev: Pointer to phy_device to attach | |
563 | * @flags: PHY device's dev_flags | |
564 | * @interface: PHY device's interface | |
565 | * | |
566 | * Description: Called by drivers to attach to a particular PHY | |
567 | * device. The phy_device is found, and properly hooked up | |
568 | * to the phy_driver. If no driver is attached, then a | |
569 | * generic driver is used. The phy_device is given a ptr to | |
570 | * the attaching device, and given a callback for link status | |
571 | * change. The phy_device is returned to the attaching driver. | |
572 | */ | |
573 | int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, | |
574 | u32 flags, phy_interface_t interface) | |
575 | { | |
576 | struct device *d = &phydev->dev; | |
577 | int err; | |
578 | ||
579 | /* Assume that if there is no driver, that it doesn't | |
580 | * exist, and we should use the genphy driver. | |
581 | */ | |
582 | if (NULL == d->driver) { | |
583 | if (phydev->is_c45) | |
584 | d->driver = &genphy_driver[GENPHY_DRV_10G].driver; | |
585 | else | |
586 | d->driver = &genphy_driver[GENPHY_DRV_1G].driver; | |
587 | ||
588 | err = d->driver->probe(d); | |
589 | if (err >= 0) | |
590 | err = device_bind_driver(d); | |
591 | ||
592 | if (err) | |
593 | return err; | |
594 | } | |
595 | ||
596 | if (phydev->attached_dev) { | |
597 | dev_err(&dev->dev, "PHY already attached\n"); | |
598 | return -EBUSY; | |
599 | } | |
600 | ||
601 | phydev->attached_dev = dev; | |
602 | dev->phydev = phydev; | |
603 | ||
604 | phydev->dev_flags = flags; | |
605 | ||
606 | phydev->interface = interface; | |
607 | ||
608 | phydev->state = PHY_READY; | |
609 | ||
610 | /* Do initial configuration here, now that | |
611 | * we have certain key parameters | |
612 | * (dev_flags and interface) | |
613 | */ | |
614 | err = phy_init_hw(phydev); | |
615 | if (err) | |
616 | phy_detach(phydev); | |
617 | ||
618 | phy_resume(phydev); | |
619 | ||
620 | return err; | |
621 | } | |
622 | EXPORT_SYMBOL(phy_attach_direct); | |
623 | ||
624 | /** | |
625 | * phy_attach - attach a network device to a particular PHY device | |
626 | * @dev: network device to attach | |
627 | * @bus_id: Bus ID of PHY device to attach | |
628 | * @interface: PHY device's interface | |
629 | * | |
630 | * Description: Same as phy_attach_direct() except that a PHY bus_id | |
631 | * string is passed instead of a pointer to a struct phy_device. | |
632 | */ | |
633 | struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, | |
634 | phy_interface_t interface) | |
635 | { | |
636 | struct bus_type *bus = &mdio_bus_type; | |
637 | struct phy_device *phydev; | |
638 | struct device *d; | |
639 | int rc; | |
640 | ||
641 | /* Search the list of PHY devices on the mdio bus for the | |
642 | * PHY with the requested name | |
643 | */ | |
644 | d = bus_find_device_by_name(bus, NULL, bus_id); | |
645 | if (!d) { | |
646 | pr_err("PHY %s not found\n", bus_id); | |
647 | return ERR_PTR(-ENODEV); | |
648 | } | |
649 | phydev = to_phy_device(d); | |
650 | ||
651 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); | |
652 | if (rc) | |
653 | return ERR_PTR(rc); | |
654 | ||
655 | return phydev; | |
656 | } | |
657 | EXPORT_SYMBOL(phy_attach); | |
658 | ||
659 | /** | |
660 | * phy_detach - detach a PHY device from its network device | |
661 | * @phydev: target phy_device struct | |
662 | */ | |
663 | void phy_detach(struct phy_device *phydev) | |
664 | { | |
665 | int i; | |
666 | phydev->attached_dev->phydev = NULL; | |
667 | phydev->attached_dev = NULL; | |
668 | phy_suspend(phydev); | |
669 | ||
670 | /* If the device had no specific driver before (i.e. - it | |
671 | * was using the generic driver), we unbind the device | |
672 | * from the generic driver so that there's a chance a | |
673 | * real driver could be loaded | |
674 | */ | |
675 | for (i = 0; i < ARRAY_SIZE(genphy_driver); i++) { | |
676 | if (phydev->dev.driver == &genphy_driver[i].driver) { | |
677 | device_release_driver(&phydev->dev); | |
678 | break; | |
679 | } | |
680 | } | |
681 | } | |
682 | EXPORT_SYMBOL(phy_detach); | |
683 | ||
684 | int phy_suspend(struct phy_device *phydev) | |
685 | { | |
686 | struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver); | |
687 | struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; | |
688 | ||
689 | /* If the device has WOL enabled, we cannot suspend the PHY */ | |
690 | phy_ethtool_get_wol(phydev, &wol); | |
691 | if (wol.wolopts) | |
692 | return -EBUSY; | |
693 | ||
694 | if (phydrv->suspend) | |
695 | return phydrv->suspend(phydev); | |
696 | return 0; | |
697 | } | |
698 | ||
699 | int phy_resume(struct phy_device *phydev) | |
700 | { | |
701 | struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver); | |
702 | ||
703 | if (phydrv->resume) | |
704 | return phydrv->resume(phydev); | |
705 | return 0; | |
706 | } | |
707 | ||
708 | /* Generic PHY support and helper functions */ | |
709 | ||
710 | /** | |
711 | * genphy_config_advert - sanitize and advertise auto-negotiation parameters | |
712 | * @phydev: target phy_device struct | |
713 | * | |
714 | * Description: Writes MII_ADVERTISE with the appropriate values, | |
715 | * after sanitizing the values to make sure we only advertise | |
716 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement | |
717 | * hasn't changed, and > 0 if it has changed. | |
718 | */ | |
719 | static int genphy_config_advert(struct phy_device *phydev) | |
720 | { | |
721 | u32 advertise; | |
722 | int oldadv, adv, bmsr; | |
723 | int err, changed = 0; | |
724 | ||
725 | /* Only allow advertising what this PHY supports */ | |
726 | phydev->advertising &= phydev->supported; | |
727 | advertise = phydev->advertising; | |
728 | ||
729 | /* Setup standard advertisement */ | |
730 | adv = phy_read(phydev, MII_ADVERTISE); | |
731 | if (adv < 0) | |
732 | return adv; | |
733 | ||
734 | oldadv = adv; | |
735 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | | |
736 | ADVERTISE_PAUSE_ASYM); | |
737 | adv |= ethtool_adv_to_mii_adv_t(advertise); | |
738 | ||
739 | if (adv != oldadv) { | |
740 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
741 | ||
742 | if (err < 0) | |
743 | return err; | |
744 | changed = 1; | |
745 | } | |
746 | ||
747 | bmsr = phy_read(phydev, MII_BMSR); | |
748 | if (bmsr < 0) | |
749 | return bmsr; | |
750 | ||
751 | /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all | |
752 | * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a | |
753 | * logical 1. | |
754 | */ | |
755 | if (!(bmsr & BMSR_ESTATEN)) | |
756 | return changed; | |
757 | ||
758 | /* Configure gigabit if it's supported */ | |
759 | adv = phy_read(phydev, MII_CTRL1000); | |
760 | if (adv < 0) | |
761 | return adv; | |
762 | ||
763 | oldadv = adv; | |
764 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); | |
765 | ||
766 | if (phydev->supported & (SUPPORTED_1000baseT_Half | | |
767 | SUPPORTED_1000baseT_Full)) { | |
768 | adv |= ethtool_adv_to_mii_ctrl1000_t(advertise); | |
769 | if (adv != oldadv) | |
770 | changed = 1; | |
771 | } | |
772 | ||
773 | err = phy_write(phydev, MII_CTRL1000, adv); | |
774 | if (err < 0) | |
775 | return err; | |
776 | ||
777 | return changed; | |
778 | } | |
779 | ||
780 | /** | |
781 | * genphy_setup_forced - configures/forces speed/duplex from @phydev | |
782 | * @phydev: target phy_device struct | |
783 | * | |
784 | * Description: Configures MII_BMCR to force speed/duplex | |
785 | * to the values in phydev. Assumes that the values are valid. | |
786 | * Please see phy_sanitize_settings(). | |
787 | */ | |
788 | int genphy_setup_forced(struct phy_device *phydev) | |
789 | { | |
790 | int ctl = 0; | |
791 | ||
792 | phydev->pause = 0; | |
793 | phydev->asym_pause = 0; | |
794 | ||
795 | if (SPEED_1000 == phydev->speed) | |
796 | ctl |= BMCR_SPEED1000; | |
797 | else if (SPEED_100 == phydev->speed) | |
798 | ctl |= BMCR_SPEED100; | |
799 | ||
800 | if (DUPLEX_FULL == phydev->duplex) | |
801 | ctl |= BMCR_FULLDPLX; | |
802 | ||
803 | return phy_write(phydev, MII_BMCR, ctl); | |
804 | } | |
805 | EXPORT_SYMBOL(genphy_setup_forced); | |
806 | ||
807 | /** | |
808 | * genphy_restart_aneg - Enable and Restart Autonegotiation | |
809 | * @phydev: target phy_device struct | |
810 | */ | |
811 | int genphy_restart_aneg(struct phy_device *phydev) | |
812 | { | |
813 | int ctl = phy_read(phydev, MII_BMCR); | |
814 | ||
815 | if (ctl < 0) | |
816 | return ctl; | |
817 | ||
818 | ctl |= BMCR_ANENABLE | BMCR_ANRESTART; | |
819 | ||
820 | /* Don't isolate the PHY if we're negotiating */ | |
821 | ctl &= ~BMCR_ISOLATE; | |
822 | ||
823 | return phy_write(phydev, MII_BMCR, ctl); | |
824 | } | |
825 | EXPORT_SYMBOL(genphy_restart_aneg); | |
826 | ||
827 | /** | |
828 | * genphy_config_aneg - restart auto-negotiation or write BMCR | |
829 | * @phydev: target phy_device struct | |
830 | * | |
831 | * Description: If auto-negotiation is enabled, we configure the | |
832 | * advertising, and then restart auto-negotiation. If it is not | |
833 | * enabled, then we write the BMCR. | |
834 | */ | |
835 | int genphy_config_aneg(struct phy_device *phydev) | |
836 | { | |
837 | int result; | |
838 | ||
839 | if (AUTONEG_ENABLE != phydev->autoneg) | |
840 | return genphy_setup_forced(phydev); | |
841 | ||
842 | result = genphy_config_advert(phydev); | |
843 | if (result < 0) /* error */ | |
844 | return result; | |
845 | if (result == 0) { | |
846 | /* Advertisement hasn't changed, but maybe aneg was never on to | |
847 | * begin with? Or maybe phy was isolated? | |
848 | */ | |
849 | int ctl = phy_read(phydev, MII_BMCR); | |
850 | ||
851 | if (ctl < 0) | |
852 | return ctl; | |
853 | ||
854 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) | |
855 | result = 1; /* do restart aneg */ | |
856 | } | |
857 | ||
858 | /* Only restart aneg if we are advertising something different | |
859 | * than we were before. | |
860 | */ | |
861 | if (result > 0) | |
862 | result = genphy_restart_aneg(phydev); | |
863 | ||
864 | return result; | |
865 | } | |
866 | EXPORT_SYMBOL(genphy_config_aneg); | |
867 | ||
868 | /** | |
869 | * genphy_aneg_done - return auto-negotiation status | |
870 | * @phydev: target phy_device struct | |
871 | * | |
872 | * Description: Reads the status register and returns 0 either if | |
873 | * auto-negotiation is incomplete, or if there was an error. | |
874 | * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. | |
875 | */ | |
876 | int genphy_aneg_done(struct phy_device *phydev) | |
877 | { | |
878 | int retval = phy_read(phydev, MII_BMSR); | |
879 | ||
880 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); | |
881 | } | |
882 | EXPORT_SYMBOL(genphy_aneg_done); | |
883 | ||
884 | static int gen10g_config_aneg(struct phy_device *phydev) | |
885 | { | |
886 | return 0; | |
887 | } | |
888 | ||
889 | /** | |
890 | * genphy_update_link - update link status in @phydev | |
891 | * @phydev: target phy_device struct | |
892 | * | |
893 | * Description: Update the value in phydev->link to reflect the | |
894 | * current link value. In order to do this, we need to read | |
895 | * the status register twice, keeping the second value. | |
896 | */ | |
897 | int genphy_update_link(struct phy_device *phydev) | |
898 | { | |
899 | int status; | |
900 | ||
901 | /* Do a fake read */ | |
902 | status = phy_read(phydev, MII_BMSR); | |
903 | if (status < 0) | |
904 | return status; | |
905 | ||
906 | /* Read link and autonegotiation status */ | |
907 | status = phy_read(phydev, MII_BMSR); | |
908 | if (status < 0) | |
909 | return status; | |
910 | ||
911 | if ((status & BMSR_LSTATUS) == 0) | |
912 | phydev->link = 0; | |
913 | else | |
914 | phydev->link = 1; | |
915 | ||
916 | return 0; | |
917 | } | |
918 | EXPORT_SYMBOL(genphy_update_link); | |
919 | ||
920 | /** | |
921 | * genphy_read_status - check the link status and update current link state | |
922 | * @phydev: target phy_device struct | |
923 | * | |
924 | * Description: Check the link, then figure out the current state | |
925 | * by comparing what we advertise with what the link partner | |
926 | * advertises. Start by checking the gigabit possibilities, | |
927 | * then move on to 10/100. | |
928 | */ | |
929 | int genphy_read_status(struct phy_device *phydev) | |
930 | { | |
931 | int adv; | |
932 | int err; | |
933 | int lpa; | |
934 | int lpagb = 0; | |
935 | int common_adv; | |
936 | int common_adv_gb = 0; | |
937 | ||
938 | /* Update the link, but return if there was an error */ | |
939 | err = genphy_update_link(phydev); | |
940 | if (err) | |
941 | return err; | |
942 | ||
943 | phydev->lp_advertising = 0; | |
944 | ||
945 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
946 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
947 | | SUPPORTED_1000baseT_Full)) { | |
948 | lpagb = phy_read(phydev, MII_STAT1000); | |
949 | if (lpagb < 0) | |
950 | return lpagb; | |
951 | ||
952 | adv = phy_read(phydev, MII_CTRL1000); | |
953 | if (adv < 0) | |
954 | return adv; | |
955 | ||
956 | phydev->lp_advertising = | |
957 | mii_stat1000_to_ethtool_lpa_t(lpagb); | |
958 | common_adv_gb = lpagb & adv << 2; | |
959 | } | |
960 | ||
961 | lpa = phy_read(phydev, MII_LPA); | |
962 | if (lpa < 0) | |
963 | return lpa; | |
964 | ||
965 | phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa); | |
966 | ||
967 | adv = phy_read(phydev, MII_ADVERTISE); | |
968 | if (adv < 0) | |
969 | return adv; | |
970 | ||
971 | common_adv = lpa & adv; | |
972 | ||
973 | phydev->speed = SPEED_10; | |
974 | phydev->duplex = DUPLEX_HALF; | |
975 | phydev->pause = 0; | |
976 | phydev->asym_pause = 0; | |
977 | ||
978 | if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) { | |
979 | phydev->speed = SPEED_1000; | |
980 | ||
981 | if (common_adv_gb & LPA_1000FULL) | |
982 | phydev->duplex = DUPLEX_FULL; | |
983 | } else if (common_adv & (LPA_100FULL | LPA_100HALF)) { | |
984 | phydev->speed = SPEED_100; | |
985 | ||
986 | if (common_adv & LPA_100FULL) | |
987 | phydev->duplex = DUPLEX_FULL; | |
988 | } else | |
989 | if (common_adv & LPA_10FULL) | |
990 | phydev->duplex = DUPLEX_FULL; | |
991 | ||
992 | if (phydev->duplex == DUPLEX_FULL) { | |
993 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; | |
994 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
995 | } | |
996 | } else { | |
997 | int bmcr = phy_read(phydev, MII_BMCR); | |
998 | ||
999 | if (bmcr < 0) | |
1000 | return bmcr; | |
1001 | ||
1002 | if (bmcr & BMCR_FULLDPLX) | |
1003 | phydev->duplex = DUPLEX_FULL; | |
1004 | else | |
1005 | phydev->duplex = DUPLEX_HALF; | |
1006 | ||
1007 | if (bmcr & BMCR_SPEED1000) | |
1008 | phydev->speed = SPEED_1000; | |
1009 | else if (bmcr & BMCR_SPEED100) | |
1010 | phydev->speed = SPEED_100; | |
1011 | else | |
1012 | phydev->speed = SPEED_10; | |
1013 | ||
1014 | phydev->pause = 0; | |
1015 | phydev->asym_pause = 0; | |
1016 | } | |
1017 | ||
1018 | return 0; | |
1019 | } | |
1020 | EXPORT_SYMBOL(genphy_read_status); | |
1021 | ||
1022 | static int gen10g_read_status(struct phy_device *phydev) | |
1023 | { | |
1024 | int devad, reg; | |
1025 | u32 mmd_mask = phydev->c45_ids.devices_in_package; | |
1026 | ||
1027 | phydev->link = 1; | |
1028 | ||
1029 | /* For now just lie and say it's 10G all the time */ | |
1030 | phydev->speed = SPEED_10000; | |
1031 | phydev->duplex = DUPLEX_FULL; | |
1032 | ||
1033 | for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) { | |
1034 | if (!(mmd_mask & 1)) | |
1035 | continue; | |
1036 | ||
1037 | /* Read twice because link state is latched and a | |
1038 | * read moves the current state into the register | |
1039 | */ | |
1040 | phy_read_mmd(phydev, devad, MDIO_STAT1); | |
1041 | reg = phy_read_mmd(phydev, devad, MDIO_STAT1); | |
1042 | if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS)) | |
1043 | phydev->link = 0; | |
1044 | } | |
1045 | ||
1046 | return 0; | |
1047 | } | |
1048 | ||
1049 | /** | |
1050 | * genphy_soft_reset - software reset the PHY via BMCR_RESET bit | |
1051 | * @phydev: target phy_device struct | |
1052 | * | |
1053 | * Description: Perform a software PHY reset using the standard | |
1054 | * BMCR_RESET bit and poll for the reset bit to be cleared. | |
1055 | * | |
1056 | * Returns: 0 on success, < 0 on failure | |
1057 | */ | |
1058 | int genphy_soft_reset(struct phy_device *phydev) | |
1059 | { | |
1060 | int ret; | |
1061 | ||
1062 | ret = phy_write(phydev, MII_BMCR, BMCR_RESET); | |
1063 | if (ret < 0) | |
1064 | return ret; | |
1065 | ||
1066 | return phy_poll_reset(phydev); | |
1067 | } | |
1068 | EXPORT_SYMBOL(genphy_soft_reset); | |
1069 | ||
1070 | int genphy_config_init(struct phy_device *phydev) | |
1071 | { | |
1072 | int val; | |
1073 | u32 features; | |
1074 | ||
1075 | features = (SUPPORTED_TP | SUPPORTED_MII | |
1076 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
1077 | SUPPORTED_BNC); | |
1078 | ||
1079 | /* Do we support autonegotiation? */ | |
1080 | val = phy_read(phydev, MII_BMSR); | |
1081 | if (val < 0) | |
1082 | return val; | |
1083 | ||
1084 | if (val & BMSR_ANEGCAPABLE) | |
1085 | features |= SUPPORTED_Autoneg; | |
1086 | ||
1087 | if (val & BMSR_100FULL) | |
1088 | features |= SUPPORTED_100baseT_Full; | |
1089 | if (val & BMSR_100HALF) | |
1090 | features |= SUPPORTED_100baseT_Half; | |
1091 | if (val & BMSR_10FULL) | |
1092 | features |= SUPPORTED_10baseT_Full; | |
1093 | if (val & BMSR_10HALF) | |
1094 | features |= SUPPORTED_10baseT_Half; | |
1095 | ||
1096 | if (val & BMSR_ESTATEN) { | |
1097 | val = phy_read(phydev, MII_ESTATUS); | |
1098 | if (val < 0) | |
1099 | return val; | |
1100 | ||
1101 | if (val & ESTATUS_1000_TFULL) | |
1102 | features |= SUPPORTED_1000baseT_Full; | |
1103 | if (val & ESTATUS_1000_THALF) | |
1104 | features |= SUPPORTED_1000baseT_Half; | |
1105 | } | |
1106 | ||
1107 | phydev->supported &= features; | |
1108 | phydev->advertising &= features; | |
1109 | ||
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | static int gen10g_soft_reset(struct phy_device *phydev) | |
1114 | { | |
1115 | /* Do nothing for now */ | |
1116 | return 0; | |
1117 | } | |
1118 | EXPORT_SYMBOL(genphy_config_init); | |
1119 | ||
1120 | static int gen10g_config_init(struct phy_device *phydev) | |
1121 | { | |
1122 | /* Temporarily just say we support everything */ | |
1123 | phydev->supported = SUPPORTED_10000baseT_Full; | |
1124 | phydev->advertising = SUPPORTED_10000baseT_Full; | |
1125 | ||
1126 | return 0; | |
1127 | } | |
1128 | ||
1129 | int genphy_suspend(struct phy_device *phydev) | |
1130 | { | |
1131 | int value; | |
1132 | ||
1133 | mutex_lock(&phydev->lock); | |
1134 | ||
1135 | value = phy_read(phydev, MII_BMCR); | |
1136 | phy_write(phydev, MII_BMCR, value | BMCR_PDOWN); | |
1137 | ||
1138 | mutex_unlock(&phydev->lock); | |
1139 | ||
1140 | return 0; | |
1141 | } | |
1142 | EXPORT_SYMBOL(genphy_suspend); | |
1143 | ||
1144 | static int gen10g_suspend(struct phy_device *phydev) | |
1145 | { | |
1146 | return 0; | |
1147 | } | |
1148 | ||
1149 | int genphy_resume(struct phy_device *phydev) | |
1150 | { | |
1151 | int value; | |
1152 | ||
1153 | mutex_lock(&phydev->lock); | |
1154 | ||
1155 | value = phy_read(phydev, MII_BMCR); | |
1156 | phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN); | |
1157 | ||
1158 | mutex_unlock(&phydev->lock); | |
1159 | ||
1160 | return 0; | |
1161 | } | |
1162 | EXPORT_SYMBOL(genphy_resume); | |
1163 | ||
1164 | static int gen10g_resume(struct phy_device *phydev) | |
1165 | { | |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | /** | |
1170 | * phy_probe - probe and init a PHY device | |
1171 | * @dev: device to probe and init | |
1172 | * | |
1173 | * Description: Take care of setting up the phy_device structure, | |
1174 | * set the state to READY (the driver's init function should | |
1175 | * set it to STARTING if needed). | |
1176 | */ | |
1177 | static int phy_probe(struct device *dev) | |
1178 | { | |
1179 | struct phy_device *phydev = to_phy_device(dev); | |
1180 | struct device_driver *drv = phydev->dev.driver; | |
1181 | struct phy_driver *phydrv = to_phy_driver(drv); | |
1182 | int err = 0; | |
1183 | ||
1184 | phydev->drv = phydrv; | |
1185 | ||
1186 | /* Disable the interrupt if the PHY doesn't support it | |
1187 | * but the interrupt is still a valid one | |
1188 | */ | |
1189 | if (!(phydrv->flags & PHY_HAS_INTERRUPT) && | |
1190 | phy_interrupt_is_valid(phydev)) | |
1191 | phydev->irq = PHY_POLL; | |
1192 | ||
1193 | if (phydrv->flags & PHY_IS_INTERNAL) | |
1194 | phydev->is_internal = true; | |
1195 | ||
1196 | mutex_lock(&phydev->lock); | |
1197 | ||
1198 | /* Start out supporting everything. Eventually, | |
1199 | * a controller will attach, and may modify one | |
1200 | * or both of these values | |
1201 | */ | |
1202 | phydev->supported = phydrv->features; | |
1203 | phydev->advertising = phydrv->features; | |
1204 | ||
1205 | /* Set the state to READY by default */ | |
1206 | phydev->state = PHY_READY; | |
1207 | ||
1208 | if (phydev->drv->probe) | |
1209 | err = phydev->drv->probe(phydev); | |
1210 | ||
1211 | mutex_unlock(&phydev->lock); | |
1212 | ||
1213 | return err; | |
1214 | } | |
1215 | ||
1216 | static int phy_remove(struct device *dev) | |
1217 | { | |
1218 | struct phy_device *phydev = to_phy_device(dev); | |
1219 | ||
1220 | mutex_lock(&phydev->lock); | |
1221 | phydev->state = PHY_DOWN; | |
1222 | mutex_unlock(&phydev->lock); | |
1223 | ||
1224 | if (phydev->drv->remove) | |
1225 | phydev->drv->remove(phydev); | |
1226 | phydev->drv = NULL; | |
1227 | ||
1228 | return 0; | |
1229 | } | |
1230 | ||
1231 | /** | |
1232 | * phy_driver_register - register a phy_driver with the PHY layer | |
1233 | * @new_driver: new phy_driver to register | |
1234 | */ | |
1235 | int phy_driver_register(struct phy_driver *new_driver) | |
1236 | { | |
1237 | int retval; | |
1238 | ||
1239 | new_driver->driver.name = new_driver->name; | |
1240 | new_driver->driver.bus = &mdio_bus_type; | |
1241 | new_driver->driver.probe = phy_probe; | |
1242 | new_driver->driver.remove = phy_remove; | |
1243 | ||
1244 | retval = driver_register(&new_driver->driver); | |
1245 | if (retval) { | |
1246 | pr_err("%s: Error %d in registering driver\n", | |
1247 | new_driver->name, retval); | |
1248 | ||
1249 | return retval; | |
1250 | } | |
1251 | ||
1252 | pr_debug("%s: Registered new driver\n", new_driver->name); | |
1253 | ||
1254 | return 0; | |
1255 | } | |
1256 | EXPORT_SYMBOL(phy_driver_register); | |
1257 | ||
1258 | int phy_drivers_register(struct phy_driver *new_driver, int n) | |
1259 | { | |
1260 | int i, ret = 0; | |
1261 | ||
1262 | for (i = 0; i < n; i++) { | |
1263 | ret = phy_driver_register(new_driver + i); | |
1264 | if (ret) { | |
1265 | while (i-- > 0) | |
1266 | phy_driver_unregister(new_driver + i); | |
1267 | break; | |
1268 | } | |
1269 | } | |
1270 | return ret; | |
1271 | } | |
1272 | EXPORT_SYMBOL(phy_drivers_register); | |
1273 | ||
1274 | void phy_driver_unregister(struct phy_driver *drv) | |
1275 | { | |
1276 | driver_unregister(&drv->driver); | |
1277 | } | |
1278 | EXPORT_SYMBOL(phy_driver_unregister); | |
1279 | ||
1280 | void phy_drivers_unregister(struct phy_driver *drv, int n) | |
1281 | { | |
1282 | int i; | |
1283 | ||
1284 | for (i = 0; i < n; i++) | |
1285 | phy_driver_unregister(drv + i); | |
1286 | } | |
1287 | EXPORT_SYMBOL(phy_drivers_unregister); | |
1288 | ||
1289 | static struct phy_driver genphy_driver[] = { | |
1290 | { | |
1291 | .phy_id = 0xffffffff, | |
1292 | .phy_id_mask = 0xffffffff, | |
1293 | .name = "Generic PHY", | |
1294 | .soft_reset = genphy_soft_reset, | |
1295 | .config_init = genphy_config_init, | |
1296 | .features = PHY_GBIT_FEATURES | SUPPORTED_MII | | |
1297 | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
1298 | SUPPORTED_BNC, | |
1299 | .config_aneg = genphy_config_aneg, | |
1300 | .aneg_done = genphy_aneg_done, | |
1301 | .read_status = genphy_read_status, | |
1302 | .suspend = genphy_suspend, | |
1303 | .resume = genphy_resume, | |
1304 | .driver = { .owner = THIS_MODULE, }, | |
1305 | }, { | |
1306 | .phy_id = 0xffffffff, | |
1307 | .phy_id_mask = 0xffffffff, | |
1308 | .name = "Generic 10G PHY", | |
1309 | .soft_reset = gen10g_soft_reset, | |
1310 | .config_init = gen10g_config_init, | |
1311 | .features = 0, | |
1312 | .config_aneg = gen10g_config_aneg, | |
1313 | .read_status = gen10g_read_status, | |
1314 | .suspend = gen10g_suspend, | |
1315 | .resume = gen10g_resume, | |
1316 | .driver = {.owner = THIS_MODULE, }, | |
1317 | } }; | |
1318 | ||
1319 | static int __init phy_init(void) | |
1320 | { | |
1321 | int rc; | |
1322 | ||
1323 | rc = mdio_bus_init(); | |
1324 | if (rc) | |
1325 | return rc; | |
1326 | ||
1327 | rc = phy_drivers_register(genphy_driver, | |
1328 | ARRAY_SIZE(genphy_driver)); | |
1329 | if (rc) | |
1330 | mdio_bus_exit(); | |
1331 | ||
1332 | return rc; | |
1333 | } | |
1334 | ||
1335 | static void __exit phy_exit(void) | |
1336 | { | |
1337 | phy_drivers_unregister(genphy_driver, | |
1338 | ARRAY_SIZE(genphy_driver)); | |
1339 | mdio_bus_exit(); | |
1340 | } | |
1341 | ||
1342 | subsys_initcall(phy_init); | |
1343 | module_exit(phy_exit); |