Commit | Line | Data |
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00db8189 AF |
1 | /* |
2 | * drivers/net/phy/phy_device.c | |
3 | * | |
4 | * Framework for finding and configuring PHYs. | |
5 | * Also contains generic PHY driver | |
6 | * | |
7 | * Author: Andy Fleming | |
8 | * | |
9 | * Copyright (c) 2004 Freescale Semiconductor, Inc. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | * | |
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> | |
33 | ||
34 | #include <asm/io.h> | |
35 | #include <asm/irq.h> | |
36 | #include <asm/uaccess.h> | |
37 | ||
afcceaa3 OH |
38 | MODULE_DESCRIPTION("PHY library"); |
39 | MODULE_AUTHOR("Andy Fleming"); | |
40 | MODULE_LICENSE("GPL"); | |
41 | ||
6f4a7f41 AV |
42 | void phy_device_free(struct phy_device *phydev) |
43 | { | |
44 | kfree(phydev); | |
45 | } | |
4dea547f | 46 | EXPORT_SYMBOL(phy_device_free); |
6f4a7f41 AV |
47 | |
48 | static void phy_device_release(struct device *dev) | |
49 | { | |
50 | phy_device_free(to_phy_device(dev)); | |
51 | } | |
52 | ||
4dea547f GL |
53 | static struct phy_driver genphy_driver; |
54 | extern int mdio_bus_init(void); | |
55 | extern void mdio_bus_exit(void); | |
56 | ||
f62220d3 AF |
57 | static LIST_HEAD(phy_fixup_list); |
58 | static DEFINE_MUTEX(phy_fixup_lock); | |
59 | ||
60 | /* | |
61 | * Creates a new phy_fixup and adds it to the list | |
62 | * @bus_id: A string which matches phydev->dev.bus_id (or PHY_ANY_ID) | |
63 | * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) | |
64 | * It can also be PHY_ANY_UID | |
65 | * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before | |
66 | * comparison | |
67 | * @run: The actual code to be run when a matching PHY is found | |
68 | */ | |
69 | int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, | |
70 | int (*run)(struct phy_device *)) | |
71 | { | |
72 | struct phy_fixup *fixup; | |
73 | ||
74 | fixup = kzalloc(sizeof(struct phy_fixup), GFP_KERNEL); | |
75 | if (!fixup) | |
76 | return -ENOMEM; | |
77 | ||
fb28ad35 | 78 | strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); |
f62220d3 AF |
79 | fixup->phy_uid = phy_uid; |
80 | fixup->phy_uid_mask = phy_uid_mask; | |
81 | fixup->run = run; | |
82 | ||
83 | mutex_lock(&phy_fixup_lock); | |
84 | list_add_tail(&fixup->list, &phy_fixup_list); | |
85 | mutex_unlock(&phy_fixup_lock); | |
86 | ||
87 | return 0; | |
88 | } | |
89 | EXPORT_SYMBOL(phy_register_fixup); | |
90 | ||
91 | /* Registers a fixup to be run on any PHY with the UID in phy_uid */ | |
92 | int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, | |
93 | int (*run)(struct phy_device *)) | |
94 | { | |
95 | return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); | |
96 | } | |
97 | EXPORT_SYMBOL(phy_register_fixup_for_uid); | |
98 | ||
99 | /* Registers a fixup to be run on the PHY with id string bus_id */ | |
100 | int phy_register_fixup_for_id(const char *bus_id, | |
101 | int (*run)(struct phy_device *)) | |
102 | { | |
103 | return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); | |
104 | } | |
105 | EXPORT_SYMBOL(phy_register_fixup_for_id); | |
106 | ||
107 | /* | |
108 | * Returns 1 if fixup matches phydev in bus_id and phy_uid. | |
109 | * Fixups can be set to match any in one or more fields. | |
110 | */ | |
111 | static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) | |
112 | { | |
fb28ad35 | 113 | if (strcmp(fixup->bus_id, dev_name(&phydev->dev)) != 0) |
f62220d3 AF |
114 | if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) |
115 | return 0; | |
116 | ||
117 | if ((fixup->phy_uid & fixup->phy_uid_mask) != | |
118 | (phydev->phy_id & fixup->phy_uid_mask)) | |
119 | if (fixup->phy_uid != PHY_ANY_UID) | |
120 | return 0; | |
121 | ||
122 | return 1; | |
123 | } | |
124 | ||
125 | /* Runs any matching fixups for this phydev */ | |
126 | int phy_scan_fixups(struct phy_device *phydev) | |
127 | { | |
128 | struct phy_fixup *fixup; | |
129 | ||
130 | mutex_lock(&phy_fixup_lock); | |
131 | list_for_each_entry(fixup, &phy_fixup_list, list) { | |
132 | if (phy_needs_fixup(phydev, fixup)) { | |
133 | int err; | |
134 | ||
135 | err = fixup->run(phydev); | |
136 | ||
bc23283c JS |
137 | if (err < 0) { |
138 | mutex_unlock(&phy_fixup_lock); | |
f62220d3 | 139 | return err; |
bc23283c | 140 | } |
f62220d3 AF |
141 | } |
142 | } | |
143 | mutex_unlock(&phy_fixup_lock); | |
144 | ||
145 | return 0; | |
146 | } | |
147 | EXPORT_SYMBOL(phy_scan_fixups); | |
148 | ||
11b0bacd VB |
149 | struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id) |
150 | { | |
151 | struct phy_device *dev; | |
152 | /* We allocate the device, and initialize the | |
153 | * default values */ | |
cd861280 | 154 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
11b0bacd VB |
155 | |
156 | if (NULL == dev) | |
157 | return (struct phy_device*) PTR_ERR((void*)-ENOMEM); | |
158 | ||
6f4a7f41 AV |
159 | dev->dev.release = phy_device_release; |
160 | ||
11b0bacd VB |
161 | dev->speed = 0; |
162 | dev->duplex = -1; | |
163 | dev->pause = dev->asym_pause = 0; | |
164 | dev->link = 1; | |
e8a2b6a4 | 165 | dev->interface = PHY_INTERFACE_MODE_GMII; |
11b0bacd VB |
166 | |
167 | dev->autoneg = AUTONEG_ENABLE; | |
168 | ||
169 | dev->addr = addr; | |
170 | dev->phy_id = phy_id; | |
171 | dev->bus = bus; | |
4dea547f GL |
172 | dev->dev.parent = bus->parent; |
173 | dev->dev.bus = &mdio_bus_type; | |
174 | dev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL; | |
175 | dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr); | |
11b0bacd VB |
176 | |
177 | dev->state = PHY_DOWN; | |
178 | ||
35b5f6b1 | 179 | mutex_init(&dev->lock); |
4f9c85a1 | 180 | INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); |
11b0bacd VB |
181 | |
182 | return dev; | |
183 | } | |
184 | EXPORT_SYMBOL(phy_device_create); | |
185 | ||
b3df0da8 | 186 | /** |
cac1f3c8 | 187 | * get_phy_id - reads the specified addr for its ID. |
b3df0da8 RD |
188 | * @bus: the target MII bus |
189 | * @addr: PHY address on the MII bus | |
cac1f3c8 | 190 | * @phy_id: where to store the ID retrieved. |
00db8189 | 191 | * |
b3df0da8 | 192 | * Description: Reads the ID registers of the PHY at @addr on the |
cac1f3c8 | 193 | * @bus, stores it in @phy_id and returns zero on success. |
00db8189 | 194 | */ |
cac1f3c8 | 195 | int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id) |
00db8189 AF |
196 | { |
197 | int phy_reg; | |
00db8189 AF |
198 | |
199 | /* Grab the bits from PHYIR1, and put them | |
200 | * in the upper half */ | |
201 | phy_reg = bus->read(bus, addr, MII_PHYSID1); | |
202 | ||
203 | if (phy_reg < 0) | |
cac1f3c8 | 204 | return -EIO; |
00db8189 | 205 | |
cac1f3c8 | 206 | *phy_id = (phy_reg & 0xffff) << 16; |
00db8189 AF |
207 | |
208 | /* Grab the bits from PHYIR2, and put them in the lower half */ | |
209 | phy_reg = bus->read(bus, addr, MII_PHYSID2); | |
210 | ||
211 | if (phy_reg < 0) | |
cac1f3c8 PG |
212 | return -EIO; |
213 | ||
214 | *phy_id |= (phy_reg & 0xffff); | |
215 | ||
216 | return 0; | |
217 | } | |
a01b3d76 | 218 | EXPORT_SYMBOL(get_phy_id); |
cac1f3c8 PG |
219 | |
220 | /** | |
221 | * get_phy_device - reads the specified PHY device and returns its @phy_device struct | |
222 | * @bus: the target MII bus | |
223 | * @addr: PHY address on the MII bus | |
224 | * | |
225 | * Description: Reads the ID registers of the PHY at @addr on the | |
226 | * @bus, then allocates and returns the phy_device to represent it. | |
227 | */ | |
228 | struct phy_device * get_phy_device(struct mii_bus *bus, int addr) | |
229 | { | |
230 | struct phy_device *dev = NULL; | |
231 | u32 phy_id; | |
232 | int r; | |
00db8189 | 233 | |
cac1f3c8 PG |
234 | r = get_phy_id(bus, addr, &phy_id); |
235 | if (r) | |
236 | return ERR_PTR(r); | |
00db8189 | 237 | |
6436cbcd GC |
238 | /* If the phy_id is mostly Fs, there is no device there */ |
239 | if ((phy_id & 0x1fffffff) == 0x1fffffff) | |
240 | return NULL; | |
241 | ||
11b0bacd | 242 | dev = phy_device_create(bus, addr, phy_id); |
00db8189 AF |
243 | |
244 | return dev; | |
245 | } | |
4dea547f GL |
246 | EXPORT_SYMBOL(get_phy_device); |
247 | ||
248 | /** | |
249 | * phy_device_register - Register the phy device on the MDIO bus | |
1d4ac5d5 | 250 | * @phydev: phy_device structure to be added to the MDIO bus |
4dea547f GL |
251 | */ |
252 | int phy_device_register(struct phy_device *phydev) | |
253 | { | |
254 | int err; | |
255 | ||
256 | /* Don't register a phy if one is already registered at this | |
257 | * address */ | |
258 | if (phydev->bus->phy_map[phydev->addr]) | |
259 | return -EINVAL; | |
260 | phydev->bus->phy_map[phydev->addr] = phydev; | |
261 | ||
262 | /* Run all of the fixups for this PHY */ | |
263 | phy_scan_fixups(phydev); | |
264 | ||
265 | err = device_register(&phydev->dev); | |
266 | if (err) { | |
267 | pr_err("phy %d failed to register\n", phydev->addr); | |
268 | goto out; | |
269 | } | |
270 | ||
271 | return 0; | |
272 | ||
273 | out: | |
274 | phydev->bus->phy_map[phydev->addr] = NULL; | |
275 | return err; | |
276 | } | |
277 | EXPORT_SYMBOL(phy_device_register); | |
00db8189 | 278 | |
b3df0da8 RD |
279 | /** |
280 | * phy_prepare_link - prepares the PHY layer to monitor link status | |
281 | * @phydev: target phy_device struct | |
282 | * @handler: callback function for link status change notifications | |
00db8189 | 283 | * |
b3df0da8 | 284 | * Description: Tells the PHY infrastructure to handle the |
00db8189 AF |
285 | * gory details on monitoring link status (whether through |
286 | * polling or an interrupt), and to call back to the | |
287 | * connected device driver when the link status changes. | |
288 | * If you want to monitor your own link state, don't call | |
b3df0da8 RD |
289 | * this function. |
290 | */ | |
00db8189 AF |
291 | void phy_prepare_link(struct phy_device *phydev, |
292 | void (*handler)(struct net_device *)) | |
293 | { | |
294 | phydev->adjust_link = handler; | |
295 | } | |
296 | ||
fa94f6d9 GL |
297 | /** |
298 | * phy_connect_direct - connect an ethernet device to a specific phy_device | |
299 | * @dev: the network device to connect | |
300 | * @phydev: the pointer to the phy device | |
301 | * @handler: callback function for state change notifications | |
302 | * @flags: PHY device's dev_flags | |
303 | * @interface: PHY device's interface | |
304 | */ | |
305 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, | |
306 | void (*handler)(struct net_device *), u32 flags, | |
307 | phy_interface_t interface) | |
308 | { | |
309 | int rc; | |
310 | ||
311 | rc = phy_attach_direct(dev, phydev, flags, interface); | |
312 | if (rc) | |
313 | return rc; | |
314 | ||
315 | phy_prepare_link(phydev, handler); | |
316 | phy_start_machine(phydev, NULL); | |
317 | if (phydev->irq > 0) | |
318 | phy_start_interrupts(phydev); | |
319 | ||
320 | return 0; | |
321 | } | |
322 | EXPORT_SYMBOL(phy_connect_direct); | |
323 | ||
b3df0da8 RD |
324 | /** |
325 | * phy_connect - connect an ethernet device to a PHY device | |
326 | * @dev: the network device to connect | |
5d12b132 | 327 | * @bus_id: the id string of the PHY device to connect |
b3df0da8 RD |
328 | * @handler: callback function for state change notifications |
329 | * @flags: PHY device's dev_flags | |
330 | * @interface: PHY device's interface | |
e1393456 | 331 | * |
b3df0da8 | 332 | * Description: Convenience function for connecting ethernet |
e1393456 AF |
333 | * devices to PHY devices. The default behavior is for |
334 | * the PHY infrastructure to handle everything, and only notify | |
335 | * the connected driver when the link status changes. If you | |
336 | * don't want, or can't use the provided functionality, you may | |
337 | * choose to call only the subset of functions which provide | |
338 | * the desired functionality. | |
339 | */ | |
f62220d3 | 340 | struct phy_device * phy_connect(struct net_device *dev, const char *bus_id, |
e8a2b6a4 | 341 | void (*handler)(struct net_device *), u32 flags, |
1a168934 | 342 | phy_interface_t interface) |
e1393456 AF |
343 | { |
344 | struct phy_device *phydev; | |
fa94f6d9 GL |
345 | struct device *d; |
346 | int rc; | |
e1393456 | 347 | |
fa94f6d9 GL |
348 | /* Search the list of PHY devices on the mdio bus for the |
349 | * PHY with the requested name */ | |
350 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); | |
351 | if (!d) { | |
352 | pr_err("PHY %s not found\n", bus_id); | |
353 | return ERR_PTR(-ENODEV); | |
354 | } | |
355 | phydev = to_phy_device(d); | |
e1393456 | 356 | |
fa94f6d9 GL |
357 | rc = phy_connect_direct(dev, phydev, handler, flags, interface); |
358 | if (rc) | |
359 | return ERR_PTR(rc); | |
e1393456 AF |
360 | |
361 | return phydev; | |
362 | } | |
363 | EXPORT_SYMBOL(phy_connect); | |
364 | ||
b3df0da8 RD |
365 | /** |
366 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY device | |
367 | * @phydev: target phy_device struct | |
368 | */ | |
e1393456 AF |
369 | void phy_disconnect(struct phy_device *phydev) |
370 | { | |
371 | if (phydev->irq > 0) | |
372 | phy_stop_interrupts(phydev); | |
373 | ||
374 | phy_stop_machine(phydev); | |
375 | ||
376 | phydev->adjust_link = NULL; | |
377 | ||
378 | phy_detach(phydev); | |
379 | } | |
380 | EXPORT_SYMBOL(phy_disconnect); | |
381 | ||
2f5cb434 AV |
382 | int phy_init_hw(struct phy_device *phydev) |
383 | { | |
384 | int ret; | |
385 | ||
386 | if (!phydev->drv || !phydev->drv->config_init) | |
387 | return 0; | |
388 | ||
389 | ret = phy_scan_fixups(phydev); | |
390 | if (ret < 0) | |
391 | return ret; | |
392 | ||
393 | return phydev->drv->config_init(phydev); | |
394 | } | |
395 | ||
b3df0da8 | 396 | /** |
fa94f6d9 | 397 | * phy_attach_direct - attach a network device to a given PHY device pointer |
b3df0da8 | 398 | * @dev: network device to attach |
fa94f6d9 | 399 | * @phydev: Pointer to phy_device to attach |
b3df0da8 RD |
400 | * @flags: PHY device's dev_flags |
401 | * @interface: PHY device's interface | |
e1393456 | 402 | * |
b3df0da8 | 403 | * Description: Called by drivers to attach to a particular PHY |
e1393456 AF |
404 | * device. The phy_device is found, and properly hooked up |
405 | * to the phy_driver. If no driver is attached, then the | |
406 | * genphy_driver is used. The phy_device is given a ptr to | |
407 | * the attaching device, and given a callback for link status | |
b3df0da8 | 408 | * change. The phy_device is returned to the attaching driver. |
e1393456 | 409 | */ |
fa94f6d9 GL |
410 | int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
411 | u32 flags, phy_interface_t interface) | |
e1393456 | 412 | { |
fa94f6d9 | 413 | struct device *d = &phydev->dev; |
e1393456 AF |
414 | |
415 | /* Assume that if there is no driver, that it doesn't | |
416 | * exist, and we should use the genphy driver. */ | |
417 | if (NULL == d->driver) { | |
418 | int err; | |
e1393456 AF |
419 | d->driver = &genphy_driver.driver; |
420 | ||
421 | err = d->driver->probe(d); | |
b7a00ecd JG |
422 | if (err >= 0) |
423 | err = device_bind_driver(d); | |
e1393456 | 424 | |
b7a00ecd | 425 | if (err) |
fa94f6d9 | 426 | return err; |
e1393456 AF |
427 | } |
428 | ||
429 | if (phydev->attached_dev) { | |
fa94f6d9 GL |
430 | dev_err(&dev->dev, "PHY already attached\n"); |
431 | return -EBUSY; | |
e1393456 AF |
432 | } |
433 | ||
434 | phydev->attached_dev = dev; | |
435 | ||
436 | phydev->dev_flags = flags; | |
437 | ||
e8a2b6a4 AF |
438 | phydev->interface = interface; |
439 | ||
440 | /* Do initial configuration here, now that | |
441 | * we have certain key parameters | |
442 | * (dev_flags and interface) */ | |
2f5cb434 | 443 | return phy_init_hw(phydev); |
fa94f6d9 GL |
444 | } |
445 | EXPORT_SYMBOL(phy_attach_direct); | |
446 | ||
447 | /** | |
448 | * phy_attach - attach a network device to a particular PHY device | |
449 | * @dev: network device to attach | |
450 | * @bus_id: Bus ID of PHY device to attach | |
451 | * @flags: PHY device's dev_flags | |
452 | * @interface: PHY device's interface | |
453 | * | |
454 | * Description: Same as phy_attach_direct() except that a PHY bus_id | |
455 | * string is passed instead of a pointer to a struct phy_device. | |
456 | */ | |
457 | struct phy_device *phy_attach(struct net_device *dev, | |
458 | const char *bus_id, u32 flags, phy_interface_t interface) | |
459 | { | |
460 | struct bus_type *bus = &mdio_bus_type; | |
461 | struct phy_device *phydev; | |
462 | struct device *d; | |
463 | int rc; | |
464 | ||
465 | /* Search the list of PHY devices on the mdio bus for the | |
466 | * PHY with the requested name */ | |
467 | d = bus_find_device_by_name(bus, NULL, bus_id); | |
468 | if (!d) { | |
469 | pr_err("PHY %s not found\n", bus_id); | |
470 | return ERR_PTR(-ENODEV); | |
e8a2b6a4 | 471 | } |
fa94f6d9 GL |
472 | phydev = to_phy_device(d); |
473 | ||
474 | rc = phy_attach_direct(dev, phydev, flags, interface); | |
475 | if (rc) | |
476 | return ERR_PTR(rc); | |
e8a2b6a4 | 477 | |
e1393456 AF |
478 | return phydev; |
479 | } | |
480 | EXPORT_SYMBOL(phy_attach); | |
481 | ||
b3df0da8 RD |
482 | /** |
483 | * phy_detach - detach a PHY device from its network device | |
484 | * @phydev: target phy_device struct | |
485 | */ | |
e1393456 AF |
486 | void phy_detach(struct phy_device *phydev) |
487 | { | |
488 | phydev->attached_dev = NULL; | |
489 | ||
490 | /* If the device had no specific driver before (i.e. - it | |
491 | * was using the generic driver), we unbind the device | |
492 | * from the generic driver so that there's a chance a | |
493 | * real driver could be loaded */ | |
87aebe07 | 494 | if (phydev->dev.driver == &genphy_driver.driver) |
e1393456 | 495 | device_release_driver(&phydev->dev); |
e1393456 AF |
496 | } |
497 | EXPORT_SYMBOL(phy_detach); | |
498 | ||
499 | ||
00db8189 AF |
500 | /* Generic PHY support and helper functions */ |
501 | ||
b3df0da8 RD |
502 | /** |
503 | * genphy_config_advert - sanitize and advertise auto-negotation parameters | |
504 | * @phydev: target phy_device struct | |
00db8189 | 505 | * |
b3df0da8 | 506 | * Description: Writes MII_ADVERTISE with the appropriate values, |
00db8189 | 507 | * after sanitizing the values to make sure we only advertise |
51e2a384 TP |
508 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
509 | * hasn't changed, and > 0 if it has changed. | |
00db8189 | 510 | */ |
e1393456 | 511 | int genphy_config_advert(struct phy_device *phydev) |
00db8189 AF |
512 | { |
513 | u32 advertise; | |
51e2a384 TP |
514 | int oldadv, adv; |
515 | int err, changed = 0; | |
00db8189 AF |
516 | |
517 | /* Only allow advertising what | |
518 | * this PHY supports */ | |
519 | phydev->advertising &= phydev->supported; | |
520 | advertise = phydev->advertising; | |
521 | ||
522 | /* Setup standard advertisement */ | |
51e2a384 | 523 | oldadv = adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
524 | |
525 | if (adv < 0) | |
526 | return adv; | |
527 | ||
528 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | | |
529 | ADVERTISE_PAUSE_ASYM); | |
530 | if (advertise & ADVERTISED_10baseT_Half) | |
531 | adv |= ADVERTISE_10HALF; | |
532 | if (advertise & ADVERTISED_10baseT_Full) | |
533 | adv |= ADVERTISE_10FULL; | |
534 | if (advertise & ADVERTISED_100baseT_Half) | |
535 | adv |= ADVERTISE_100HALF; | |
536 | if (advertise & ADVERTISED_100baseT_Full) | |
537 | adv |= ADVERTISE_100FULL; | |
538 | if (advertise & ADVERTISED_Pause) | |
539 | adv |= ADVERTISE_PAUSE_CAP; | |
540 | if (advertise & ADVERTISED_Asym_Pause) | |
541 | adv |= ADVERTISE_PAUSE_ASYM; | |
542 | ||
51e2a384 TP |
543 | if (adv != oldadv) { |
544 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
00db8189 | 545 | |
51e2a384 TP |
546 | if (err < 0) |
547 | return err; | |
548 | changed = 1; | |
549 | } | |
00db8189 AF |
550 | |
551 | /* Configure gigabit if it's supported */ | |
552 | if (phydev->supported & (SUPPORTED_1000baseT_Half | | |
553 | SUPPORTED_1000baseT_Full)) { | |
51e2a384 | 554 | oldadv = adv = phy_read(phydev, MII_CTRL1000); |
00db8189 AF |
555 | |
556 | if (adv < 0) | |
557 | return adv; | |
558 | ||
559 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); | |
560 | if (advertise & SUPPORTED_1000baseT_Half) | |
561 | adv |= ADVERTISE_1000HALF; | |
562 | if (advertise & SUPPORTED_1000baseT_Full) | |
563 | adv |= ADVERTISE_1000FULL; | |
00db8189 | 564 | |
51e2a384 TP |
565 | if (adv != oldadv) { |
566 | err = phy_write(phydev, MII_CTRL1000, adv); | |
567 | ||
568 | if (err < 0) | |
569 | return err; | |
570 | changed = 1; | |
571 | } | |
00db8189 AF |
572 | } |
573 | ||
51e2a384 | 574 | return changed; |
00db8189 | 575 | } |
e1393456 | 576 | EXPORT_SYMBOL(genphy_config_advert); |
00db8189 | 577 | |
b3df0da8 RD |
578 | /** |
579 | * genphy_setup_forced - configures/forces speed/duplex from @phydev | |
580 | * @phydev: target phy_device struct | |
00db8189 | 581 | * |
b3df0da8 | 582 | * Description: Configures MII_BMCR to force speed/duplex |
00db8189 | 583 | * to the values in phydev. Assumes that the values are valid. |
b3df0da8 RD |
584 | * Please see phy_sanitize_settings(). |
585 | */ | |
00db8189 AF |
586 | int genphy_setup_forced(struct phy_device *phydev) |
587 | { | |
f62220d3 | 588 | int err; |
bc1e0a09 | 589 | int ctl = 0; |
00db8189 AF |
590 | |
591 | phydev->pause = phydev->asym_pause = 0; | |
592 | ||
593 | if (SPEED_1000 == phydev->speed) | |
594 | ctl |= BMCR_SPEED1000; | |
595 | else if (SPEED_100 == phydev->speed) | |
596 | ctl |= BMCR_SPEED100; | |
597 | ||
598 | if (DUPLEX_FULL == phydev->duplex) | |
599 | ctl |= BMCR_FULLDPLX; | |
600 | ||
f62220d3 | 601 | err = phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 602 | |
f62220d3 | 603 | return err; |
00db8189 AF |
604 | } |
605 | ||
606 | ||
b3df0da8 RD |
607 | /** |
608 | * genphy_restart_aneg - Enable and Restart Autonegotiation | |
609 | * @phydev: target phy_device struct | |
610 | */ | |
00db8189 AF |
611 | int genphy_restart_aneg(struct phy_device *phydev) |
612 | { | |
613 | int ctl; | |
614 | ||
615 | ctl = phy_read(phydev, MII_BMCR); | |
616 | ||
617 | if (ctl < 0) | |
618 | return ctl; | |
619 | ||
620 | ctl |= (BMCR_ANENABLE | BMCR_ANRESTART); | |
621 | ||
622 | /* Don't isolate the PHY if we're negotiating */ | |
623 | ctl &= ~(BMCR_ISOLATE); | |
624 | ||
625 | ctl = phy_write(phydev, MII_BMCR, ctl); | |
626 | ||
627 | return ctl; | |
628 | } | |
892871dc | 629 | EXPORT_SYMBOL(genphy_restart_aneg); |
00db8189 AF |
630 | |
631 | ||
b3df0da8 RD |
632 | /** |
633 | * genphy_config_aneg - restart auto-negotiation or write BMCR | |
634 | * @phydev: target phy_device struct | |
00db8189 | 635 | * |
b3df0da8 | 636 | * Description: If auto-negotiation is enabled, we configure the |
00db8189 | 637 | * advertising, and then restart auto-negotiation. If it is not |
b3df0da8 | 638 | * enabled, then we write the BMCR. |
00db8189 AF |
639 | */ |
640 | int genphy_config_aneg(struct phy_device *phydev) | |
641 | { | |
de339c2a | 642 | int result; |
00db8189 | 643 | |
de339c2a TP |
644 | if (AUTONEG_ENABLE != phydev->autoneg) |
645 | return genphy_setup_forced(phydev); | |
00db8189 | 646 | |
de339c2a | 647 | result = genphy_config_advert(phydev); |
00db8189 | 648 | |
de339c2a TP |
649 | if (result < 0) /* error */ |
650 | return result; | |
651 | ||
652 | if (result == 0) { | |
653 | /* Advertisment hasn't changed, but maybe aneg was never on to | |
654 | * begin with? Or maybe phy was isolated? */ | |
655 | int ctl = phy_read(phydev, MII_BMCR); | |
656 | ||
657 | if (ctl < 0) | |
658 | return ctl; | |
659 | ||
660 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) | |
661 | result = 1; /* do restart aneg */ | |
662 | } | |
663 | ||
664 | /* Only restart aneg if we are advertising something different | |
665 | * than we were before. */ | |
666 | if (result > 0) | |
667 | result = genphy_restart_aneg(phydev); | |
00db8189 | 668 | |
51e2a384 | 669 | return result; |
00db8189 AF |
670 | } |
671 | EXPORT_SYMBOL(genphy_config_aneg); | |
672 | ||
b3df0da8 RD |
673 | /** |
674 | * genphy_update_link - update link status in @phydev | |
675 | * @phydev: target phy_device struct | |
00db8189 | 676 | * |
b3df0da8 | 677 | * Description: Update the value in phydev->link to reflect the |
00db8189 | 678 | * current link value. In order to do this, we need to read |
b3df0da8 | 679 | * the status register twice, keeping the second value. |
00db8189 AF |
680 | */ |
681 | int genphy_update_link(struct phy_device *phydev) | |
682 | { | |
683 | int status; | |
684 | ||
685 | /* Do a fake read */ | |
686 | status = phy_read(phydev, MII_BMSR); | |
687 | ||
688 | if (status < 0) | |
689 | return status; | |
690 | ||
691 | /* Read link and autonegotiation status */ | |
692 | status = phy_read(phydev, MII_BMSR); | |
693 | ||
694 | if (status < 0) | |
695 | return status; | |
696 | ||
697 | if ((status & BMSR_LSTATUS) == 0) | |
698 | phydev->link = 0; | |
699 | else | |
700 | phydev->link = 1; | |
701 | ||
702 | return 0; | |
703 | } | |
6b655529 | 704 | EXPORT_SYMBOL(genphy_update_link); |
00db8189 | 705 | |
b3df0da8 RD |
706 | /** |
707 | * genphy_read_status - check the link status and update current link state | |
708 | * @phydev: target phy_device struct | |
00db8189 | 709 | * |
b3df0da8 | 710 | * Description: Check the link, then figure out the current state |
00db8189 AF |
711 | * by comparing what we advertise with what the link partner |
712 | * advertises. Start by checking the gigabit possibilities, | |
713 | * then move on to 10/100. | |
714 | */ | |
715 | int genphy_read_status(struct phy_device *phydev) | |
716 | { | |
717 | int adv; | |
718 | int err; | |
719 | int lpa; | |
720 | int lpagb = 0; | |
721 | ||
722 | /* Update the link, but return if there | |
723 | * was an error */ | |
724 | err = genphy_update_link(phydev); | |
725 | if (err) | |
726 | return err; | |
727 | ||
728 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
729 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
730 | | SUPPORTED_1000baseT_Full)) { | |
731 | lpagb = phy_read(phydev, MII_STAT1000); | |
732 | ||
733 | if (lpagb < 0) | |
734 | return lpagb; | |
735 | ||
736 | adv = phy_read(phydev, MII_CTRL1000); | |
737 | ||
738 | if (adv < 0) | |
739 | return adv; | |
740 | ||
741 | lpagb &= adv << 2; | |
742 | } | |
743 | ||
744 | lpa = phy_read(phydev, MII_LPA); | |
745 | ||
746 | if (lpa < 0) | |
747 | return lpa; | |
748 | ||
749 | adv = phy_read(phydev, MII_ADVERTISE); | |
750 | ||
751 | if (adv < 0) | |
752 | return adv; | |
753 | ||
754 | lpa &= adv; | |
755 | ||
756 | phydev->speed = SPEED_10; | |
757 | phydev->duplex = DUPLEX_HALF; | |
758 | phydev->pause = phydev->asym_pause = 0; | |
759 | ||
760 | if (lpagb & (LPA_1000FULL | LPA_1000HALF)) { | |
761 | phydev->speed = SPEED_1000; | |
762 | ||
763 | if (lpagb & LPA_1000FULL) | |
764 | phydev->duplex = DUPLEX_FULL; | |
765 | } else if (lpa & (LPA_100FULL | LPA_100HALF)) { | |
766 | phydev->speed = SPEED_100; | |
767 | ||
768 | if (lpa & LPA_100FULL) | |
769 | phydev->duplex = DUPLEX_FULL; | |
770 | } else | |
771 | if (lpa & LPA_10FULL) | |
772 | phydev->duplex = DUPLEX_FULL; | |
773 | ||
774 | if (phydev->duplex == DUPLEX_FULL){ | |
775 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; | |
776 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
777 | } | |
778 | } else { | |
779 | int bmcr = phy_read(phydev, MII_BMCR); | |
780 | if (bmcr < 0) | |
781 | return bmcr; | |
782 | ||
783 | if (bmcr & BMCR_FULLDPLX) | |
784 | phydev->duplex = DUPLEX_FULL; | |
785 | else | |
786 | phydev->duplex = DUPLEX_HALF; | |
787 | ||
788 | if (bmcr & BMCR_SPEED1000) | |
789 | phydev->speed = SPEED_1000; | |
790 | else if (bmcr & BMCR_SPEED100) | |
791 | phydev->speed = SPEED_100; | |
792 | else | |
793 | phydev->speed = SPEED_10; | |
794 | ||
795 | phydev->pause = phydev->asym_pause = 0; | |
796 | } | |
797 | ||
798 | return 0; | |
799 | } | |
800 | EXPORT_SYMBOL(genphy_read_status); | |
801 | ||
802 | static int genphy_config_init(struct phy_device *phydev) | |
803 | { | |
84c22d79 | 804 | int val; |
00db8189 AF |
805 | u32 features; |
806 | ||
807 | /* For now, I'll claim that the generic driver supports | |
808 | * all possible port types */ | |
809 | features = (SUPPORTED_TP | SUPPORTED_MII | |
810 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
811 | SUPPORTED_BNC); | |
812 | ||
813 | /* Do we support autonegotiation? */ | |
814 | val = phy_read(phydev, MII_BMSR); | |
815 | ||
816 | if (val < 0) | |
817 | return val; | |
818 | ||
819 | if (val & BMSR_ANEGCAPABLE) | |
820 | features |= SUPPORTED_Autoneg; | |
821 | ||
822 | if (val & BMSR_100FULL) | |
823 | features |= SUPPORTED_100baseT_Full; | |
824 | if (val & BMSR_100HALF) | |
825 | features |= SUPPORTED_100baseT_Half; | |
826 | if (val & BMSR_10FULL) | |
827 | features |= SUPPORTED_10baseT_Full; | |
828 | if (val & BMSR_10HALF) | |
829 | features |= SUPPORTED_10baseT_Half; | |
830 | ||
831 | if (val & BMSR_ESTATEN) { | |
832 | val = phy_read(phydev, MII_ESTATUS); | |
833 | ||
834 | if (val < 0) | |
835 | return val; | |
836 | ||
837 | if (val & ESTATUS_1000_TFULL) | |
838 | features |= SUPPORTED_1000baseT_Full; | |
839 | if (val & ESTATUS_1000_THALF) | |
840 | features |= SUPPORTED_1000baseT_Half; | |
841 | } | |
842 | ||
843 | phydev->supported = features; | |
844 | phydev->advertising = features; | |
845 | ||
846 | return 0; | |
847 | } | |
0f0ca340 GC |
848 | int genphy_suspend(struct phy_device *phydev) |
849 | { | |
850 | int value; | |
851 | ||
852 | mutex_lock(&phydev->lock); | |
853 | ||
854 | value = phy_read(phydev, MII_BMCR); | |
855 | phy_write(phydev, MII_BMCR, (value | BMCR_PDOWN)); | |
856 | ||
857 | mutex_unlock(&phydev->lock); | |
858 | ||
859 | return 0; | |
860 | } | |
861 | EXPORT_SYMBOL(genphy_suspend); | |
00db8189 | 862 | |
0f0ca340 GC |
863 | int genphy_resume(struct phy_device *phydev) |
864 | { | |
865 | int value; | |
866 | ||
867 | mutex_lock(&phydev->lock); | |
868 | ||
869 | value = phy_read(phydev, MII_BMCR); | |
870 | phy_write(phydev, MII_BMCR, (value & ~BMCR_PDOWN)); | |
871 | ||
872 | mutex_unlock(&phydev->lock); | |
873 | ||
874 | return 0; | |
875 | } | |
876 | EXPORT_SYMBOL(genphy_resume); | |
00db8189 | 877 | |
b3df0da8 RD |
878 | /** |
879 | * phy_probe - probe and init a PHY device | |
880 | * @dev: device to probe and init | |
00db8189 | 881 | * |
b3df0da8 | 882 | * Description: Take care of setting up the phy_device structure, |
00db8189 AF |
883 | * set the state to READY (the driver's init function should |
884 | * set it to STARTING if needed). | |
885 | */ | |
886 | static int phy_probe(struct device *dev) | |
887 | { | |
888 | struct phy_device *phydev; | |
889 | struct phy_driver *phydrv; | |
890 | struct device_driver *drv; | |
891 | int err = 0; | |
892 | ||
893 | phydev = to_phy_device(dev); | |
894 | ||
895 | /* Make sure the driver is held. | |
896 | * XXX -- Is this correct? */ | |
897 | drv = get_driver(phydev->dev.driver); | |
898 | phydrv = to_phy_driver(drv); | |
899 | phydev->drv = phydrv; | |
900 | ||
901 | /* Disable the interrupt if the PHY doesn't support it */ | |
902 | if (!(phydrv->flags & PHY_HAS_INTERRUPT)) | |
903 | phydev->irq = PHY_POLL; | |
904 | ||
35b5f6b1 | 905 | mutex_lock(&phydev->lock); |
00db8189 AF |
906 | |
907 | /* Start out supporting everything. Eventually, | |
908 | * a controller will attach, and may modify one | |
909 | * or both of these values */ | |
910 | phydev->supported = phydrv->features; | |
911 | phydev->advertising = phydrv->features; | |
912 | ||
913 | /* Set the state to READY by default */ | |
914 | phydev->state = PHY_READY; | |
915 | ||
916 | if (phydev->drv->probe) | |
917 | err = phydev->drv->probe(phydev); | |
918 | ||
35b5f6b1 | 919 | mutex_unlock(&phydev->lock); |
00db8189 | 920 | |
00db8189 | 921 | return err; |
e8a2b6a4 | 922 | |
00db8189 AF |
923 | } |
924 | ||
925 | static int phy_remove(struct device *dev) | |
926 | { | |
927 | struct phy_device *phydev; | |
928 | ||
929 | phydev = to_phy_device(dev); | |
930 | ||
35b5f6b1 | 931 | mutex_lock(&phydev->lock); |
00db8189 | 932 | phydev->state = PHY_DOWN; |
35b5f6b1 | 933 | mutex_unlock(&phydev->lock); |
00db8189 AF |
934 | |
935 | if (phydev->drv->remove) | |
936 | phydev->drv->remove(phydev); | |
937 | ||
938 | put_driver(dev->driver); | |
939 | phydev->drv = NULL; | |
940 | ||
941 | return 0; | |
942 | } | |
943 | ||
b3df0da8 RD |
944 | /** |
945 | * phy_driver_register - register a phy_driver with the PHY layer | |
946 | * @new_driver: new phy_driver to register | |
947 | */ | |
00db8189 AF |
948 | int phy_driver_register(struct phy_driver *new_driver) |
949 | { | |
950 | int retval; | |
951 | ||
00db8189 AF |
952 | new_driver->driver.name = new_driver->name; |
953 | new_driver->driver.bus = &mdio_bus_type; | |
954 | new_driver->driver.probe = phy_probe; | |
955 | new_driver->driver.remove = phy_remove; | |
956 | ||
957 | retval = driver_register(&new_driver->driver); | |
958 | ||
959 | if (retval) { | |
960 | printk(KERN_ERR "%s: Error %d in registering driver\n", | |
961 | new_driver->name, retval); | |
962 | ||
963 | return retval; | |
964 | } | |
965 | ||
f2511f13 | 966 | pr_debug("%s: Registered new driver\n", new_driver->name); |
00db8189 AF |
967 | |
968 | return 0; | |
969 | } | |
970 | EXPORT_SYMBOL(phy_driver_register); | |
971 | ||
972 | void phy_driver_unregister(struct phy_driver *drv) | |
973 | { | |
974 | driver_unregister(&drv->driver); | |
975 | } | |
976 | EXPORT_SYMBOL(phy_driver_unregister); | |
977 | ||
e1393456 AF |
978 | static struct phy_driver genphy_driver = { |
979 | .phy_id = 0xffffffff, | |
980 | .phy_id_mask = 0xffffffff, | |
981 | .name = "Generic PHY", | |
982 | .config_init = genphy_config_init, | |
983 | .features = 0, | |
984 | .config_aneg = genphy_config_aneg, | |
985 | .read_status = genphy_read_status, | |
0f0ca340 GC |
986 | .suspend = genphy_suspend, |
987 | .resume = genphy_resume, | |
e1393456 AF |
988 | .driver = {.owner= THIS_MODULE, }, |
989 | }; | |
00db8189 | 990 | |
67c4f3fa | 991 | static int __init phy_init(void) |
00db8189 | 992 | { |
67c4f3fa | 993 | int rc; |
67c4f3fa JG |
994 | |
995 | rc = mdio_bus_init(); | |
996 | if (rc) | |
e1393456 | 997 | return rc; |
00db8189 | 998 | |
e1393456 AF |
999 | rc = phy_driver_register(&genphy_driver); |
1000 | if (rc) | |
1001 | mdio_bus_exit(); | |
67c4f3fa | 1002 | |
67c4f3fa | 1003 | return rc; |
00db8189 AF |
1004 | } |
1005 | ||
67c4f3fa | 1006 | static void __exit phy_exit(void) |
00db8189 AF |
1007 | { |
1008 | phy_driver_unregister(&genphy_driver); | |
e1393456 | 1009 | mdio_bus_exit(); |
00db8189 AF |
1010 | } |
1011 | ||
e1393456 | 1012 | subsys_initcall(phy_init); |
67c4f3fa | 1013 | module_exit(phy_exit); |