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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 | |
f8f76db1 JP |
279 | /** |
280 | * phy_find_first - finds the first PHY device on the bus | |
281 | * @bus: the target MII bus | |
282 | */ | |
283 | struct phy_device *phy_find_first(struct mii_bus *bus) | |
284 | { | |
285 | int addr; | |
286 | ||
287 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { | |
288 | if (bus->phy_map[addr]) | |
289 | return bus->phy_map[addr]; | |
290 | } | |
291 | return NULL; | |
292 | } | |
293 | EXPORT_SYMBOL(phy_find_first); | |
294 | ||
b3df0da8 RD |
295 | /** |
296 | * phy_prepare_link - prepares the PHY layer to monitor link status | |
297 | * @phydev: target phy_device struct | |
298 | * @handler: callback function for link status change notifications | |
00db8189 | 299 | * |
b3df0da8 | 300 | * Description: Tells the PHY infrastructure to handle the |
00db8189 AF |
301 | * gory details on monitoring link status (whether through |
302 | * polling or an interrupt), and to call back to the | |
303 | * connected device driver when the link status changes. | |
304 | * If you want to monitor your own link state, don't call | |
b3df0da8 RD |
305 | * this function. |
306 | */ | |
00db8189 AF |
307 | void phy_prepare_link(struct phy_device *phydev, |
308 | void (*handler)(struct net_device *)) | |
309 | { | |
310 | phydev->adjust_link = handler; | |
311 | } | |
312 | ||
fa94f6d9 GL |
313 | /** |
314 | * phy_connect_direct - connect an ethernet device to a specific phy_device | |
315 | * @dev: the network device to connect | |
316 | * @phydev: the pointer to the phy device | |
317 | * @handler: callback function for state change notifications | |
318 | * @flags: PHY device's dev_flags | |
319 | * @interface: PHY device's interface | |
320 | */ | |
321 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, | |
322 | void (*handler)(struct net_device *), u32 flags, | |
323 | phy_interface_t interface) | |
324 | { | |
325 | int rc; | |
326 | ||
327 | rc = phy_attach_direct(dev, phydev, flags, interface); | |
328 | if (rc) | |
329 | return rc; | |
330 | ||
331 | phy_prepare_link(phydev, handler); | |
332 | phy_start_machine(phydev, NULL); | |
333 | if (phydev->irq > 0) | |
334 | phy_start_interrupts(phydev); | |
335 | ||
336 | return 0; | |
337 | } | |
338 | EXPORT_SYMBOL(phy_connect_direct); | |
339 | ||
b3df0da8 RD |
340 | /** |
341 | * phy_connect - connect an ethernet device to a PHY device | |
342 | * @dev: the network device to connect | |
5d12b132 | 343 | * @bus_id: the id string of the PHY device to connect |
b3df0da8 RD |
344 | * @handler: callback function for state change notifications |
345 | * @flags: PHY device's dev_flags | |
346 | * @interface: PHY device's interface | |
e1393456 | 347 | * |
b3df0da8 | 348 | * Description: Convenience function for connecting ethernet |
e1393456 AF |
349 | * devices to PHY devices. The default behavior is for |
350 | * the PHY infrastructure to handle everything, and only notify | |
351 | * the connected driver when the link status changes. If you | |
352 | * don't want, or can't use the provided functionality, you may | |
353 | * choose to call only the subset of functions which provide | |
354 | * the desired functionality. | |
355 | */ | |
f62220d3 | 356 | struct phy_device * phy_connect(struct net_device *dev, const char *bus_id, |
e8a2b6a4 | 357 | void (*handler)(struct net_device *), u32 flags, |
1a168934 | 358 | phy_interface_t interface) |
e1393456 AF |
359 | { |
360 | struct phy_device *phydev; | |
fa94f6d9 GL |
361 | struct device *d; |
362 | int rc; | |
e1393456 | 363 | |
fa94f6d9 GL |
364 | /* Search the list of PHY devices on the mdio bus for the |
365 | * PHY with the requested name */ | |
366 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); | |
367 | if (!d) { | |
368 | pr_err("PHY %s not found\n", bus_id); | |
369 | return ERR_PTR(-ENODEV); | |
370 | } | |
371 | phydev = to_phy_device(d); | |
e1393456 | 372 | |
fa94f6d9 GL |
373 | rc = phy_connect_direct(dev, phydev, handler, flags, interface); |
374 | if (rc) | |
375 | return ERR_PTR(rc); | |
e1393456 AF |
376 | |
377 | return phydev; | |
378 | } | |
379 | EXPORT_SYMBOL(phy_connect); | |
380 | ||
b3df0da8 RD |
381 | /** |
382 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY device | |
383 | * @phydev: target phy_device struct | |
384 | */ | |
e1393456 AF |
385 | void phy_disconnect(struct phy_device *phydev) |
386 | { | |
387 | if (phydev->irq > 0) | |
388 | phy_stop_interrupts(phydev); | |
389 | ||
390 | phy_stop_machine(phydev); | |
391 | ||
392 | phydev->adjust_link = NULL; | |
393 | ||
394 | phy_detach(phydev); | |
395 | } | |
396 | EXPORT_SYMBOL(phy_disconnect); | |
397 | ||
2f5cb434 AV |
398 | int phy_init_hw(struct phy_device *phydev) |
399 | { | |
400 | int ret; | |
401 | ||
402 | if (!phydev->drv || !phydev->drv->config_init) | |
403 | return 0; | |
404 | ||
405 | ret = phy_scan_fixups(phydev); | |
406 | if (ret < 0) | |
407 | return ret; | |
408 | ||
409 | return phydev->drv->config_init(phydev); | |
410 | } | |
411 | ||
b3df0da8 | 412 | /** |
fa94f6d9 | 413 | * phy_attach_direct - attach a network device to a given PHY device pointer |
b3df0da8 | 414 | * @dev: network device to attach |
fa94f6d9 | 415 | * @phydev: Pointer to phy_device to attach |
b3df0da8 RD |
416 | * @flags: PHY device's dev_flags |
417 | * @interface: PHY device's interface | |
e1393456 | 418 | * |
b3df0da8 | 419 | * Description: Called by drivers to attach to a particular PHY |
e1393456 AF |
420 | * device. The phy_device is found, and properly hooked up |
421 | * to the phy_driver. If no driver is attached, then the | |
422 | * genphy_driver is used. The phy_device is given a ptr to | |
423 | * the attaching device, and given a callback for link status | |
b3df0da8 | 424 | * change. The phy_device is returned to the attaching driver. |
e1393456 | 425 | */ |
fa94f6d9 GL |
426 | int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
427 | u32 flags, phy_interface_t interface) | |
e1393456 | 428 | { |
fa94f6d9 | 429 | struct device *d = &phydev->dev; |
e1393456 AF |
430 | |
431 | /* Assume that if there is no driver, that it doesn't | |
432 | * exist, and we should use the genphy driver. */ | |
433 | if (NULL == d->driver) { | |
434 | int err; | |
e1393456 AF |
435 | d->driver = &genphy_driver.driver; |
436 | ||
437 | err = d->driver->probe(d); | |
b7a00ecd JG |
438 | if (err >= 0) |
439 | err = device_bind_driver(d); | |
e1393456 | 440 | |
b7a00ecd | 441 | if (err) |
fa94f6d9 | 442 | return err; |
e1393456 AF |
443 | } |
444 | ||
445 | if (phydev->attached_dev) { | |
fa94f6d9 GL |
446 | dev_err(&dev->dev, "PHY already attached\n"); |
447 | return -EBUSY; | |
e1393456 AF |
448 | } |
449 | ||
450 | phydev->attached_dev = dev; | |
451 | ||
452 | phydev->dev_flags = flags; | |
453 | ||
e8a2b6a4 AF |
454 | phydev->interface = interface; |
455 | ||
456 | /* Do initial configuration here, now that | |
457 | * we have certain key parameters | |
458 | * (dev_flags and interface) */ | |
2f5cb434 | 459 | return phy_init_hw(phydev); |
fa94f6d9 GL |
460 | } |
461 | EXPORT_SYMBOL(phy_attach_direct); | |
462 | ||
463 | /** | |
464 | * phy_attach - attach a network device to a particular PHY device | |
465 | * @dev: network device to attach | |
466 | * @bus_id: Bus ID of PHY device to attach | |
467 | * @flags: PHY device's dev_flags | |
468 | * @interface: PHY device's interface | |
469 | * | |
470 | * Description: Same as phy_attach_direct() except that a PHY bus_id | |
471 | * string is passed instead of a pointer to a struct phy_device. | |
472 | */ | |
473 | struct phy_device *phy_attach(struct net_device *dev, | |
474 | const char *bus_id, u32 flags, phy_interface_t interface) | |
475 | { | |
476 | struct bus_type *bus = &mdio_bus_type; | |
477 | struct phy_device *phydev; | |
478 | struct device *d; | |
479 | int rc; | |
480 | ||
481 | /* Search the list of PHY devices on the mdio bus for the | |
482 | * PHY with the requested name */ | |
483 | d = bus_find_device_by_name(bus, NULL, bus_id); | |
484 | if (!d) { | |
485 | pr_err("PHY %s not found\n", bus_id); | |
486 | return ERR_PTR(-ENODEV); | |
e8a2b6a4 | 487 | } |
fa94f6d9 GL |
488 | phydev = to_phy_device(d); |
489 | ||
490 | rc = phy_attach_direct(dev, phydev, flags, interface); | |
491 | if (rc) | |
492 | return ERR_PTR(rc); | |
e8a2b6a4 | 493 | |
e1393456 AF |
494 | return phydev; |
495 | } | |
496 | EXPORT_SYMBOL(phy_attach); | |
497 | ||
b3df0da8 RD |
498 | /** |
499 | * phy_detach - detach a PHY device from its network device | |
500 | * @phydev: target phy_device struct | |
501 | */ | |
e1393456 AF |
502 | void phy_detach(struct phy_device *phydev) |
503 | { | |
504 | phydev->attached_dev = NULL; | |
505 | ||
506 | /* If the device had no specific driver before (i.e. - it | |
507 | * was using the generic driver), we unbind the device | |
508 | * from the generic driver so that there's a chance a | |
509 | * real driver could be loaded */ | |
87aebe07 | 510 | if (phydev->dev.driver == &genphy_driver.driver) |
e1393456 | 511 | device_release_driver(&phydev->dev); |
e1393456 AF |
512 | } |
513 | EXPORT_SYMBOL(phy_detach); | |
514 | ||
515 | ||
00db8189 AF |
516 | /* Generic PHY support and helper functions */ |
517 | ||
b3df0da8 RD |
518 | /** |
519 | * genphy_config_advert - sanitize and advertise auto-negotation parameters | |
520 | * @phydev: target phy_device struct | |
00db8189 | 521 | * |
b3df0da8 | 522 | * Description: Writes MII_ADVERTISE with the appropriate values, |
00db8189 | 523 | * after sanitizing the values to make sure we only advertise |
51e2a384 TP |
524 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
525 | * hasn't changed, and > 0 if it has changed. | |
00db8189 | 526 | */ |
e1393456 | 527 | int genphy_config_advert(struct phy_device *phydev) |
00db8189 AF |
528 | { |
529 | u32 advertise; | |
51e2a384 TP |
530 | int oldadv, adv; |
531 | int err, changed = 0; | |
00db8189 AF |
532 | |
533 | /* Only allow advertising what | |
534 | * this PHY supports */ | |
535 | phydev->advertising &= phydev->supported; | |
536 | advertise = phydev->advertising; | |
537 | ||
538 | /* Setup standard advertisement */ | |
51e2a384 | 539 | oldadv = adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
540 | |
541 | if (adv < 0) | |
542 | return adv; | |
543 | ||
544 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | | |
545 | ADVERTISE_PAUSE_ASYM); | |
546 | if (advertise & ADVERTISED_10baseT_Half) | |
547 | adv |= ADVERTISE_10HALF; | |
548 | if (advertise & ADVERTISED_10baseT_Full) | |
549 | adv |= ADVERTISE_10FULL; | |
550 | if (advertise & ADVERTISED_100baseT_Half) | |
551 | adv |= ADVERTISE_100HALF; | |
552 | if (advertise & ADVERTISED_100baseT_Full) | |
553 | adv |= ADVERTISE_100FULL; | |
554 | if (advertise & ADVERTISED_Pause) | |
555 | adv |= ADVERTISE_PAUSE_CAP; | |
556 | if (advertise & ADVERTISED_Asym_Pause) | |
557 | adv |= ADVERTISE_PAUSE_ASYM; | |
558 | ||
51e2a384 TP |
559 | if (adv != oldadv) { |
560 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
00db8189 | 561 | |
51e2a384 TP |
562 | if (err < 0) |
563 | return err; | |
564 | changed = 1; | |
565 | } | |
00db8189 AF |
566 | |
567 | /* Configure gigabit if it's supported */ | |
568 | if (phydev->supported & (SUPPORTED_1000baseT_Half | | |
569 | SUPPORTED_1000baseT_Full)) { | |
51e2a384 | 570 | oldadv = adv = phy_read(phydev, MII_CTRL1000); |
00db8189 AF |
571 | |
572 | if (adv < 0) | |
573 | return adv; | |
574 | ||
575 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); | |
576 | if (advertise & SUPPORTED_1000baseT_Half) | |
577 | adv |= ADVERTISE_1000HALF; | |
578 | if (advertise & SUPPORTED_1000baseT_Full) | |
579 | adv |= ADVERTISE_1000FULL; | |
00db8189 | 580 | |
51e2a384 TP |
581 | if (adv != oldadv) { |
582 | err = phy_write(phydev, MII_CTRL1000, adv); | |
583 | ||
584 | if (err < 0) | |
585 | return err; | |
586 | changed = 1; | |
587 | } | |
00db8189 AF |
588 | } |
589 | ||
51e2a384 | 590 | return changed; |
00db8189 | 591 | } |
e1393456 | 592 | EXPORT_SYMBOL(genphy_config_advert); |
00db8189 | 593 | |
b3df0da8 RD |
594 | /** |
595 | * genphy_setup_forced - configures/forces speed/duplex from @phydev | |
596 | * @phydev: target phy_device struct | |
00db8189 | 597 | * |
b3df0da8 | 598 | * Description: Configures MII_BMCR to force speed/duplex |
00db8189 | 599 | * to the values in phydev. Assumes that the values are valid. |
b3df0da8 RD |
600 | * Please see phy_sanitize_settings(). |
601 | */ | |
00db8189 AF |
602 | int genphy_setup_forced(struct phy_device *phydev) |
603 | { | |
f62220d3 | 604 | int err; |
bc1e0a09 | 605 | int ctl = 0; |
00db8189 AF |
606 | |
607 | phydev->pause = phydev->asym_pause = 0; | |
608 | ||
609 | if (SPEED_1000 == phydev->speed) | |
610 | ctl |= BMCR_SPEED1000; | |
611 | else if (SPEED_100 == phydev->speed) | |
612 | ctl |= BMCR_SPEED100; | |
613 | ||
614 | if (DUPLEX_FULL == phydev->duplex) | |
615 | ctl |= BMCR_FULLDPLX; | |
616 | ||
f62220d3 | 617 | err = phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 618 | |
f62220d3 | 619 | return err; |
00db8189 AF |
620 | } |
621 | ||
622 | ||
b3df0da8 RD |
623 | /** |
624 | * genphy_restart_aneg - Enable and Restart Autonegotiation | |
625 | * @phydev: target phy_device struct | |
626 | */ | |
00db8189 AF |
627 | int genphy_restart_aneg(struct phy_device *phydev) |
628 | { | |
629 | int ctl; | |
630 | ||
631 | ctl = phy_read(phydev, MII_BMCR); | |
632 | ||
633 | if (ctl < 0) | |
634 | return ctl; | |
635 | ||
636 | ctl |= (BMCR_ANENABLE | BMCR_ANRESTART); | |
637 | ||
638 | /* Don't isolate the PHY if we're negotiating */ | |
639 | ctl &= ~(BMCR_ISOLATE); | |
640 | ||
641 | ctl = phy_write(phydev, MII_BMCR, ctl); | |
642 | ||
643 | return ctl; | |
644 | } | |
892871dc | 645 | EXPORT_SYMBOL(genphy_restart_aneg); |
00db8189 AF |
646 | |
647 | ||
b3df0da8 RD |
648 | /** |
649 | * genphy_config_aneg - restart auto-negotiation or write BMCR | |
650 | * @phydev: target phy_device struct | |
00db8189 | 651 | * |
b3df0da8 | 652 | * Description: If auto-negotiation is enabled, we configure the |
00db8189 | 653 | * advertising, and then restart auto-negotiation. If it is not |
b3df0da8 | 654 | * enabled, then we write the BMCR. |
00db8189 AF |
655 | */ |
656 | int genphy_config_aneg(struct phy_device *phydev) | |
657 | { | |
de339c2a | 658 | int result; |
00db8189 | 659 | |
de339c2a TP |
660 | if (AUTONEG_ENABLE != phydev->autoneg) |
661 | return genphy_setup_forced(phydev); | |
00db8189 | 662 | |
de339c2a | 663 | result = genphy_config_advert(phydev); |
00db8189 | 664 | |
de339c2a TP |
665 | if (result < 0) /* error */ |
666 | return result; | |
667 | ||
668 | if (result == 0) { | |
669 | /* Advertisment hasn't changed, but maybe aneg was never on to | |
670 | * begin with? Or maybe phy was isolated? */ | |
671 | int ctl = phy_read(phydev, MII_BMCR); | |
672 | ||
673 | if (ctl < 0) | |
674 | return ctl; | |
675 | ||
676 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) | |
677 | result = 1; /* do restart aneg */ | |
678 | } | |
679 | ||
680 | /* Only restart aneg if we are advertising something different | |
681 | * than we were before. */ | |
682 | if (result > 0) | |
683 | result = genphy_restart_aneg(phydev); | |
00db8189 | 684 | |
51e2a384 | 685 | return result; |
00db8189 AF |
686 | } |
687 | EXPORT_SYMBOL(genphy_config_aneg); | |
688 | ||
b3df0da8 RD |
689 | /** |
690 | * genphy_update_link - update link status in @phydev | |
691 | * @phydev: target phy_device struct | |
00db8189 | 692 | * |
b3df0da8 | 693 | * Description: Update the value in phydev->link to reflect the |
00db8189 | 694 | * current link value. In order to do this, we need to read |
b3df0da8 | 695 | * the status register twice, keeping the second value. |
00db8189 AF |
696 | */ |
697 | int genphy_update_link(struct phy_device *phydev) | |
698 | { | |
699 | int status; | |
700 | ||
701 | /* Do a fake read */ | |
702 | status = phy_read(phydev, MII_BMSR); | |
703 | ||
704 | if (status < 0) | |
705 | return status; | |
706 | ||
707 | /* Read link and autonegotiation status */ | |
708 | status = phy_read(phydev, MII_BMSR); | |
709 | ||
710 | if (status < 0) | |
711 | return status; | |
712 | ||
713 | if ((status & BMSR_LSTATUS) == 0) | |
714 | phydev->link = 0; | |
715 | else | |
716 | phydev->link = 1; | |
717 | ||
718 | return 0; | |
719 | } | |
6b655529 | 720 | EXPORT_SYMBOL(genphy_update_link); |
00db8189 | 721 | |
b3df0da8 RD |
722 | /** |
723 | * genphy_read_status - check the link status and update current link state | |
724 | * @phydev: target phy_device struct | |
00db8189 | 725 | * |
b3df0da8 | 726 | * Description: Check the link, then figure out the current state |
00db8189 AF |
727 | * by comparing what we advertise with what the link partner |
728 | * advertises. Start by checking the gigabit possibilities, | |
729 | * then move on to 10/100. | |
730 | */ | |
731 | int genphy_read_status(struct phy_device *phydev) | |
732 | { | |
733 | int adv; | |
734 | int err; | |
735 | int lpa; | |
736 | int lpagb = 0; | |
737 | ||
738 | /* Update the link, but return if there | |
739 | * was an error */ | |
740 | err = genphy_update_link(phydev); | |
741 | if (err) | |
742 | return err; | |
743 | ||
744 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
745 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
746 | | SUPPORTED_1000baseT_Full)) { | |
747 | lpagb = phy_read(phydev, MII_STAT1000); | |
748 | ||
749 | if (lpagb < 0) | |
750 | return lpagb; | |
751 | ||
752 | adv = phy_read(phydev, MII_CTRL1000); | |
753 | ||
754 | if (adv < 0) | |
755 | return adv; | |
756 | ||
757 | lpagb &= adv << 2; | |
758 | } | |
759 | ||
760 | lpa = phy_read(phydev, MII_LPA); | |
761 | ||
762 | if (lpa < 0) | |
763 | return lpa; | |
764 | ||
765 | adv = phy_read(phydev, MII_ADVERTISE); | |
766 | ||
767 | if (adv < 0) | |
768 | return adv; | |
769 | ||
770 | lpa &= adv; | |
771 | ||
772 | phydev->speed = SPEED_10; | |
773 | phydev->duplex = DUPLEX_HALF; | |
774 | phydev->pause = phydev->asym_pause = 0; | |
775 | ||
776 | if (lpagb & (LPA_1000FULL | LPA_1000HALF)) { | |
777 | phydev->speed = SPEED_1000; | |
778 | ||
779 | if (lpagb & LPA_1000FULL) | |
780 | phydev->duplex = DUPLEX_FULL; | |
781 | } else if (lpa & (LPA_100FULL | LPA_100HALF)) { | |
782 | phydev->speed = SPEED_100; | |
783 | ||
784 | if (lpa & LPA_100FULL) | |
785 | phydev->duplex = DUPLEX_FULL; | |
786 | } else | |
787 | if (lpa & LPA_10FULL) | |
788 | phydev->duplex = DUPLEX_FULL; | |
789 | ||
790 | if (phydev->duplex == DUPLEX_FULL){ | |
791 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; | |
792 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
793 | } | |
794 | } else { | |
795 | int bmcr = phy_read(phydev, MII_BMCR); | |
796 | if (bmcr < 0) | |
797 | return bmcr; | |
798 | ||
799 | if (bmcr & BMCR_FULLDPLX) | |
800 | phydev->duplex = DUPLEX_FULL; | |
801 | else | |
802 | phydev->duplex = DUPLEX_HALF; | |
803 | ||
804 | if (bmcr & BMCR_SPEED1000) | |
805 | phydev->speed = SPEED_1000; | |
806 | else if (bmcr & BMCR_SPEED100) | |
807 | phydev->speed = SPEED_100; | |
808 | else | |
809 | phydev->speed = SPEED_10; | |
810 | ||
811 | phydev->pause = phydev->asym_pause = 0; | |
812 | } | |
813 | ||
814 | return 0; | |
815 | } | |
816 | EXPORT_SYMBOL(genphy_read_status); | |
817 | ||
818 | static int genphy_config_init(struct phy_device *phydev) | |
819 | { | |
84c22d79 | 820 | int val; |
00db8189 AF |
821 | u32 features; |
822 | ||
823 | /* For now, I'll claim that the generic driver supports | |
824 | * all possible port types */ | |
825 | features = (SUPPORTED_TP | SUPPORTED_MII | |
826 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
827 | SUPPORTED_BNC); | |
828 | ||
829 | /* Do we support autonegotiation? */ | |
830 | val = phy_read(phydev, MII_BMSR); | |
831 | ||
832 | if (val < 0) | |
833 | return val; | |
834 | ||
835 | if (val & BMSR_ANEGCAPABLE) | |
836 | features |= SUPPORTED_Autoneg; | |
837 | ||
838 | if (val & BMSR_100FULL) | |
839 | features |= SUPPORTED_100baseT_Full; | |
840 | if (val & BMSR_100HALF) | |
841 | features |= SUPPORTED_100baseT_Half; | |
842 | if (val & BMSR_10FULL) | |
843 | features |= SUPPORTED_10baseT_Full; | |
844 | if (val & BMSR_10HALF) | |
845 | features |= SUPPORTED_10baseT_Half; | |
846 | ||
847 | if (val & BMSR_ESTATEN) { | |
848 | val = phy_read(phydev, MII_ESTATUS); | |
849 | ||
850 | if (val < 0) | |
851 | return val; | |
852 | ||
853 | if (val & ESTATUS_1000_TFULL) | |
854 | features |= SUPPORTED_1000baseT_Full; | |
855 | if (val & ESTATUS_1000_THALF) | |
856 | features |= SUPPORTED_1000baseT_Half; | |
857 | } | |
858 | ||
859 | phydev->supported = features; | |
860 | phydev->advertising = features; | |
861 | ||
862 | return 0; | |
863 | } | |
0f0ca340 GC |
864 | int genphy_suspend(struct phy_device *phydev) |
865 | { | |
866 | int value; | |
867 | ||
868 | mutex_lock(&phydev->lock); | |
869 | ||
870 | value = phy_read(phydev, MII_BMCR); | |
871 | phy_write(phydev, MII_BMCR, (value | BMCR_PDOWN)); | |
872 | ||
873 | mutex_unlock(&phydev->lock); | |
874 | ||
875 | return 0; | |
876 | } | |
877 | EXPORT_SYMBOL(genphy_suspend); | |
00db8189 | 878 | |
0f0ca340 GC |
879 | int genphy_resume(struct phy_device *phydev) |
880 | { | |
881 | int value; | |
882 | ||
883 | mutex_lock(&phydev->lock); | |
884 | ||
885 | value = phy_read(phydev, MII_BMCR); | |
886 | phy_write(phydev, MII_BMCR, (value & ~BMCR_PDOWN)); | |
887 | ||
888 | mutex_unlock(&phydev->lock); | |
889 | ||
890 | return 0; | |
891 | } | |
892 | EXPORT_SYMBOL(genphy_resume); | |
00db8189 | 893 | |
b3df0da8 RD |
894 | /** |
895 | * phy_probe - probe and init a PHY device | |
896 | * @dev: device to probe and init | |
00db8189 | 897 | * |
b3df0da8 | 898 | * Description: Take care of setting up the phy_device structure, |
00db8189 AF |
899 | * set the state to READY (the driver's init function should |
900 | * set it to STARTING if needed). | |
901 | */ | |
902 | static int phy_probe(struct device *dev) | |
903 | { | |
904 | struct phy_device *phydev; | |
905 | struct phy_driver *phydrv; | |
906 | struct device_driver *drv; | |
907 | int err = 0; | |
908 | ||
909 | phydev = to_phy_device(dev); | |
910 | ||
911 | /* Make sure the driver is held. | |
912 | * XXX -- Is this correct? */ | |
913 | drv = get_driver(phydev->dev.driver); | |
914 | phydrv = to_phy_driver(drv); | |
915 | phydev->drv = phydrv; | |
916 | ||
917 | /* Disable the interrupt if the PHY doesn't support it */ | |
918 | if (!(phydrv->flags & PHY_HAS_INTERRUPT)) | |
919 | phydev->irq = PHY_POLL; | |
920 | ||
35b5f6b1 | 921 | mutex_lock(&phydev->lock); |
00db8189 AF |
922 | |
923 | /* Start out supporting everything. Eventually, | |
924 | * a controller will attach, and may modify one | |
925 | * or both of these values */ | |
926 | phydev->supported = phydrv->features; | |
927 | phydev->advertising = phydrv->features; | |
928 | ||
929 | /* Set the state to READY by default */ | |
930 | phydev->state = PHY_READY; | |
931 | ||
932 | if (phydev->drv->probe) | |
933 | err = phydev->drv->probe(phydev); | |
934 | ||
35b5f6b1 | 935 | mutex_unlock(&phydev->lock); |
00db8189 | 936 | |
00db8189 | 937 | return err; |
e8a2b6a4 | 938 | |
00db8189 AF |
939 | } |
940 | ||
941 | static int phy_remove(struct device *dev) | |
942 | { | |
943 | struct phy_device *phydev; | |
944 | ||
945 | phydev = to_phy_device(dev); | |
946 | ||
35b5f6b1 | 947 | mutex_lock(&phydev->lock); |
00db8189 | 948 | phydev->state = PHY_DOWN; |
35b5f6b1 | 949 | mutex_unlock(&phydev->lock); |
00db8189 AF |
950 | |
951 | if (phydev->drv->remove) | |
952 | phydev->drv->remove(phydev); | |
953 | ||
954 | put_driver(dev->driver); | |
955 | phydev->drv = NULL; | |
956 | ||
957 | return 0; | |
958 | } | |
959 | ||
b3df0da8 RD |
960 | /** |
961 | * phy_driver_register - register a phy_driver with the PHY layer | |
962 | * @new_driver: new phy_driver to register | |
963 | */ | |
00db8189 AF |
964 | int phy_driver_register(struct phy_driver *new_driver) |
965 | { | |
966 | int retval; | |
967 | ||
00db8189 AF |
968 | new_driver->driver.name = new_driver->name; |
969 | new_driver->driver.bus = &mdio_bus_type; | |
970 | new_driver->driver.probe = phy_probe; | |
971 | new_driver->driver.remove = phy_remove; | |
972 | ||
973 | retval = driver_register(&new_driver->driver); | |
974 | ||
975 | if (retval) { | |
976 | printk(KERN_ERR "%s: Error %d in registering driver\n", | |
977 | new_driver->name, retval); | |
978 | ||
979 | return retval; | |
980 | } | |
981 | ||
f2511f13 | 982 | pr_debug("%s: Registered new driver\n", new_driver->name); |
00db8189 AF |
983 | |
984 | return 0; | |
985 | } | |
986 | EXPORT_SYMBOL(phy_driver_register); | |
987 | ||
988 | void phy_driver_unregister(struct phy_driver *drv) | |
989 | { | |
990 | driver_unregister(&drv->driver); | |
991 | } | |
992 | EXPORT_SYMBOL(phy_driver_unregister); | |
993 | ||
e1393456 AF |
994 | static struct phy_driver genphy_driver = { |
995 | .phy_id = 0xffffffff, | |
996 | .phy_id_mask = 0xffffffff, | |
997 | .name = "Generic PHY", | |
998 | .config_init = genphy_config_init, | |
999 | .features = 0, | |
1000 | .config_aneg = genphy_config_aneg, | |
1001 | .read_status = genphy_read_status, | |
0f0ca340 GC |
1002 | .suspend = genphy_suspend, |
1003 | .resume = genphy_resume, | |
e1393456 AF |
1004 | .driver = {.owner= THIS_MODULE, }, |
1005 | }; | |
00db8189 | 1006 | |
67c4f3fa | 1007 | static int __init phy_init(void) |
00db8189 | 1008 | { |
67c4f3fa | 1009 | int rc; |
67c4f3fa JG |
1010 | |
1011 | rc = mdio_bus_init(); | |
1012 | if (rc) | |
e1393456 | 1013 | return rc; |
00db8189 | 1014 | |
e1393456 AF |
1015 | rc = phy_driver_register(&genphy_driver); |
1016 | if (rc) | |
1017 | mdio_bus_exit(); | |
67c4f3fa | 1018 | |
67c4f3fa | 1019 | return rc; |
00db8189 AF |
1020 | } |
1021 | ||
67c4f3fa | 1022 | static void __exit phy_exit(void) |
00db8189 AF |
1023 | { |
1024 | phy_driver_unregister(&genphy_driver); | |
e1393456 | 1025 | mdio_bus_exit(); |
00db8189 AF |
1026 | } |
1027 | ||
e1393456 | 1028 | subsys_initcall(phy_init); |
67c4f3fa | 1029 | module_exit(phy_exit); |