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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 | ||
e1393456 AF |
42 | static struct phy_driver genphy_driver; |
43 | extern int mdio_bus_init(void); | |
44 | extern void mdio_bus_exit(void); | |
67c4f3fa | 45 | |
6f4a7f41 AV |
46 | void phy_device_free(struct phy_device *phydev) |
47 | { | |
48 | kfree(phydev); | |
49 | } | |
50 | ||
51 | static void phy_device_release(struct device *dev) | |
52 | { | |
53 | phy_device_free(to_phy_device(dev)); | |
54 | } | |
55 | ||
f62220d3 AF |
56 | static LIST_HEAD(phy_fixup_list); |
57 | static DEFINE_MUTEX(phy_fixup_lock); | |
58 | ||
59 | /* | |
60 | * Creates a new phy_fixup and adds it to the list | |
61 | * @bus_id: A string which matches phydev->dev.bus_id (or PHY_ANY_ID) | |
62 | * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) | |
63 | * It can also be PHY_ANY_UID | |
64 | * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before | |
65 | * comparison | |
66 | * @run: The actual code to be run when a matching PHY is found | |
67 | */ | |
68 | int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, | |
69 | int (*run)(struct phy_device *)) | |
70 | { | |
71 | struct phy_fixup *fixup; | |
72 | ||
73 | fixup = kzalloc(sizeof(struct phy_fixup), GFP_KERNEL); | |
74 | if (!fixup) | |
75 | return -ENOMEM; | |
76 | ||
77 | strncpy(fixup->bus_id, bus_id, BUS_ID_SIZE); | |
78 | fixup->phy_uid = phy_uid; | |
79 | fixup->phy_uid_mask = phy_uid_mask; | |
80 | fixup->run = run; | |
81 | ||
82 | mutex_lock(&phy_fixup_lock); | |
83 | list_add_tail(&fixup->list, &phy_fixup_list); | |
84 | mutex_unlock(&phy_fixup_lock); | |
85 | ||
86 | return 0; | |
87 | } | |
88 | EXPORT_SYMBOL(phy_register_fixup); | |
89 | ||
90 | /* Registers a fixup to be run on any PHY with the UID in phy_uid */ | |
91 | int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, | |
92 | int (*run)(struct phy_device *)) | |
93 | { | |
94 | return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); | |
95 | } | |
96 | EXPORT_SYMBOL(phy_register_fixup_for_uid); | |
97 | ||
98 | /* Registers a fixup to be run on the PHY with id string bus_id */ | |
99 | int phy_register_fixup_for_id(const char *bus_id, | |
100 | int (*run)(struct phy_device *)) | |
101 | { | |
102 | return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); | |
103 | } | |
104 | EXPORT_SYMBOL(phy_register_fixup_for_id); | |
105 | ||
106 | /* | |
107 | * Returns 1 if fixup matches phydev in bus_id and phy_uid. | |
108 | * Fixups can be set to match any in one or more fields. | |
109 | */ | |
110 | static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) | |
111 | { | |
112 | if (strcmp(fixup->bus_id, phydev->dev.bus_id) != 0) | |
113 | if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) | |
114 | return 0; | |
115 | ||
116 | if ((fixup->phy_uid & fixup->phy_uid_mask) != | |
117 | (phydev->phy_id & fixup->phy_uid_mask)) | |
118 | if (fixup->phy_uid != PHY_ANY_UID) | |
119 | return 0; | |
120 | ||
121 | return 1; | |
122 | } | |
123 | ||
124 | /* Runs any matching fixups for this phydev */ | |
125 | int phy_scan_fixups(struct phy_device *phydev) | |
126 | { | |
127 | struct phy_fixup *fixup; | |
128 | ||
129 | mutex_lock(&phy_fixup_lock); | |
130 | list_for_each_entry(fixup, &phy_fixup_list, list) { | |
131 | if (phy_needs_fixup(phydev, fixup)) { | |
132 | int err; | |
133 | ||
134 | err = fixup->run(phydev); | |
135 | ||
136 | if (err < 0) | |
137 | return err; | |
138 | } | |
139 | } | |
140 | mutex_unlock(&phy_fixup_lock); | |
141 | ||
142 | return 0; | |
143 | } | |
144 | EXPORT_SYMBOL(phy_scan_fixups); | |
145 | ||
11b0bacd VB |
146 | struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id) |
147 | { | |
148 | struct phy_device *dev; | |
149 | /* We allocate the device, and initialize the | |
150 | * default values */ | |
cd861280 | 151 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
11b0bacd VB |
152 | |
153 | if (NULL == dev) | |
154 | return (struct phy_device*) PTR_ERR((void*)-ENOMEM); | |
155 | ||
6f4a7f41 AV |
156 | dev->dev.release = phy_device_release; |
157 | ||
11b0bacd VB |
158 | dev->speed = 0; |
159 | dev->duplex = -1; | |
160 | dev->pause = dev->asym_pause = 0; | |
161 | dev->link = 1; | |
e8a2b6a4 | 162 | dev->interface = PHY_INTERFACE_MODE_GMII; |
11b0bacd VB |
163 | |
164 | dev->autoneg = AUTONEG_ENABLE; | |
165 | ||
166 | dev->addr = addr; | |
167 | dev->phy_id = phy_id; | |
168 | dev->bus = bus; | |
169 | ||
170 | dev->state = PHY_DOWN; | |
171 | ||
35b5f6b1 | 172 | mutex_init(&dev->lock); |
11b0bacd VB |
173 | |
174 | return dev; | |
175 | } | |
176 | EXPORT_SYMBOL(phy_device_create); | |
177 | ||
b3df0da8 | 178 | /** |
cac1f3c8 | 179 | * get_phy_id - reads the specified addr for its ID. |
b3df0da8 RD |
180 | * @bus: the target MII bus |
181 | * @addr: PHY address on the MII bus | |
cac1f3c8 | 182 | * @phy_id: where to store the ID retrieved. |
00db8189 | 183 | * |
b3df0da8 | 184 | * Description: Reads the ID registers of the PHY at @addr on the |
cac1f3c8 | 185 | * @bus, stores it in @phy_id and returns zero on success. |
00db8189 | 186 | */ |
cac1f3c8 | 187 | int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id) |
00db8189 AF |
188 | { |
189 | int phy_reg; | |
00db8189 AF |
190 | |
191 | /* Grab the bits from PHYIR1, and put them | |
192 | * in the upper half */ | |
193 | phy_reg = bus->read(bus, addr, MII_PHYSID1); | |
194 | ||
195 | if (phy_reg < 0) | |
cac1f3c8 | 196 | return -EIO; |
00db8189 | 197 | |
cac1f3c8 | 198 | *phy_id = (phy_reg & 0xffff) << 16; |
00db8189 AF |
199 | |
200 | /* Grab the bits from PHYIR2, and put them in the lower half */ | |
201 | phy_reg = bus->read(bus, addr, MII_PHYSID2); | |
202 | ||
203 | if (phy_reg < 0) | |
cac1f3c8 PG |
204 | return -EIO; |
205 | ||
206 | *phy_id |= (phy_reg & 0xffff); | |
207 | ||
208 | return 0; | |
209 | } | |
a01b3d76 | 210 | EXPORT_SYMBOL(get_phy_id); |
cac1f3c8 PG |
211 | |
212 | /** | |
213 | * get_phy_device - reads the specified PHY device and returns its @phy_device struct | |
214 | * @bus: the target MII bus | |
215 | * @addr: PHY address on the MII bus | |
216 | * | |
217 | * Description: Reads the ID registers of the PHY at @addr on the | |
218 | * @bus, then allocates and returns the phy_device to represent it. | |
219 | */ | |
220 | struct phy_device * get_phy_device(struct mii_bus *bus, int addr) | |
221 | { | |
222 | struct phy_device *dev = NULL; | |
223 | u32 phy_id; | |
224 | int r; | |
00db8189 | 225 | |
cac1f3c8 PG |
226 | r = get_phy_id(bus, addr, &phy_id); |
227 | if (r) | |
228 | return ERR_PTR(r); | |
00db8189 | 229 | |
3ee82383 GB |
230 | /* If the phy_id is all Fs or all 0s, there is no device there */ |
231 | if ((0xffff == phy_id) || (0x00 == phy_id)) | |
00db8189 AF |
232 | return NULL; |
233 | ||
11b0bacd | 234 | dev = phy_device_create(bus, addr, phy_id); |
00db8189 AF |
235 | |
236 | return dev; | |
237 | } | |
238 | ||
b3df0da8 RD |
239 | /** |
240 | * phy_prepare_link - prepares the PHY layer to monitor link status | |
241 | * @phydev: target phy_device struct | |
242 | * @handler: callback function for link status change notifications | |
00db8189 | 243 | * |
b3df0da8 | 244 | * Description: Tells the PHY infrastructure to handle the |
00db8189 AF |
245 | * gory details on monitoring link status (whether through |
246 | * polling or an interrupt), and to call back to the | |
247 | * connected device driver when the link status changes. | |
248 | * If you want to monitor your own link state, don't call | |
b3df0da8 RD |
249 | * this function. |
250 | */ | |
00db8189 AF |
251 | void phy_prepare_link(struct phy_device *phydev, |
252 | void (*handler)(struct net_device *)) | |
253 | { | |
254 | phydev->adjust_link = handler; | |
255 | } | |
256 | ||
b3df0da8 RD |
257 | /** |
258 | * phy_connect - connect an ethernet device to a PHY device | |
259 | * @dev: the network device to connect | |
5d12b132 | 260 | * @bus_id: the id string of the PHY device to connect |
b3df0da8 RD |
261 | * @handler: callback function for state change notifications |
262 | * @flags: PHY device's dev_flags | |
263 | * @interface: PHY device's interface | |
e1393456 | 264 | * |
b3df0da8 | 265 | * Description: Convenience function for connecting ethernet |
e1393456 AF |
266 | * devices to PHY devices. The default behavior is for |
267 | * the PHY infrastructure to handle everything, and only notify | |
268 | * the connected driver when the link status changes. If you | |
269 | * don't want, or can't use the provided functionality, you may | |
270 | * choose to call only the subset of functions which provide | |
271 | * the desired functionality. | |
272 | */ | |
f62220d3 | 273 | struct phy_device * phy_connect(struct net_device *dev, const char *bus_id, |
e8a2b6a4 | 274 | void (*handler)(struct net_device *), u32 flags, |
1a168934 | 275 | phy_interface_t interface) |
e1393456 AF |
276 | { |
277 | struct phy_device *phydev; | |
278 | ||
f62220d3 | 279 | phydev = phy_attach(dev, bus_id, flags, interface); |
e1393456 AF |
280 | |
281 | if (IS_ERR(phydev)) | |
282 | return phydev; | |
283 | ||
284 | phy_prepare_link(phydev, handler); | |
285 | ||
286 | phy_start_machine(phydev, NULL); | |
287 | ||
288 | if (phydev->irq > 0) | |
289 | phy_start_interrupts(phydev); | |
290 | ||
291 | return phydev; | |
292 | } | |
293 | EXPORT_SYMBOL(phy_connect); | |
294 | ||
b3df0da8 RD |
295 | /** |
296 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY device | |
297 | * @phydev: target phy_device struct | |
298 | */ | |
e1393456 AF |
299 | void phy_disconnect(struct phy_device *phydev) |
300 | { | |
301 | if (phydev->irq > 0) | |
302 | phy_stop_interrupts(phydev); | |
303 | ||
304 | phy_stop_machine(phydev); | |
305 | ||
306 | phydev->adjust_link = NULL; | |
307 | ||
308 | phy_detach(phydev); | |
309 | } | |
310 | EXPORT_SYMBOL(phy_disconnect); | |
311 | ||
b3df0da8 RD |
312 | /** |
313 | * phy_attach - attach a network device to a particular PHY device | |
314 | * @dev: network device to attach | |
f62220d3 | 315 | * @bus_id: PHY device to attach |
b3df0da8 RD |
316 | * @flags: PHY device's dev_flags |
317 | * @interface: PHY device's interface | |
e1393456 | 318 | * |
b3df0da8 | 319 | * Description: Called by drivers to attach to a particular PHY |
e1393456 AF |
320 | * device. The phy_device is found, and properly hooked up |
321 | * to the phy_driver. If no driver is attached, then the | |
322 | * genphy_driver is used. The phy_device is given a ptr to | |
323 | * the attaching device, and given a callback for link status | |
b3df0da8 | 324 | * change. The phy_device is returned to the attaching driver. |
e1393456 | 325 | */ |
e1393456 | 326 | struct phy_device *phy_attach(struct net_device *dev, |
f62220d3 | 327 | const char *bus_id, u32 flags, phy_interface_t interface) |
e1393456 AF |
328 | { |
329 | struct bus_type *bus = &mdio_bus_type; | |
330 | struct phy_device *phydev; | |
331 | struct device *d; | |
332 | ||
333 | /* Search the list of PHY devices on the mdio bus for the | |
334 | * PHY with the requested name */ | |
26853ab6 | 335 | d = bus_find_device_by_name(bus, NULL, bus_id); |
e1393456 AF |
336 | if (d) { |
337 | phydev = to_phy_device(d); | |
338 | } else { | |
f62220d3 | 339 | printk(KERN_ERR "%s not found\n", bus_id); |
e1393456 AF |
340 | return ERR_PTR(-ENODEV); |
341 | } | |
342 | ||
343 | /* Assume that if there is no driver, that it doesn't | |
344 | * exist, and we should use the genphy driver. */ | |
345 | if (NULL == d->driver) { | |
346 | int err; | |
e1393456 AF |
347 | d->driver = &genphy_driver.driver; |
348 | ||
349 | err = d->driver->probe(d); | |
b7a00ecd JG |
350 | if (err >= 0) |
351 | err = device_bind_driver(d); | |
e1393456 | 352 | |
b7a00ecd JG |
353 | if (err) |
354 | return ERR_PTR(err); | |
e1393456 AF |
355 | } |
356 | ||
357 | if (phydev->attached_dev) { | |
358 | printk(KERN_ERR "%s: %s already attached\n", | |
f62220d3 | 359 | dev->name, bus_id); |
e1393456 AF |
360 | return ERR_PTR(-EBUSY); |
361 | } | |
362 | ||
363 | phydev->attached_dev = dev; | |
364 | ||
365 | phydev->dev_flags = flags; | |
366 | ||
e8a2b6a4 AF |
367 | phydev->interface = interface; |
368 | ||
369 | /* Do initial configuration here, now that | |
370 | * we have certain key parameters | |
371 | * (dev_flags and interface) */ | |
372 | if (phydev->drv->config_init) { | |
373 | int err; | |
374 | ||
f62220d3 AF |
375 | err = phy_scan_fixups(phydev); |
376 | ||
377 | if (err < 0) | |
378 | return ERR_PTR(err); | |
379 | ||
e8a2b6a4 AF |
380 | err = phydev->drv->config_init(phydev); |
381 | ||
382 | if (err < 0) | |
383 | return ERR_PTR(err); | |
384 | } | |
385 | ||
e1393456 AF |
386 | return phydev; |
387 | } | |
388 | EXPORT_SYMBOL(phy_attach); | |
389 | ||
b3df0da8 RD |
390 | /** |
391 | * phy_detach - detach a PHY device from its network device | |
392 | * @phydev: target phy_device struct | |
393 | */ | |
e1393456 AF |
394 | void phy_detach(struct phy_device *phydev) |
395 | { | |
396 | phydev->attached_dev = NULL; | |
397 | ||
398 | /* If the device had no specific driver before (i.e. - it | |
399 | * was using the generic driver), we unbind the device | |
400 | * from the generic driver so that there's a chance a | |
401 | * real driver could be loaded */ | |
87aebe07 | 402 | if (phydev->dev.driver == &genphy_driver.driver) |
e1393456 | 403 | device_release_driver(&phydev->dev); |
e1393456 AF |
404 | } |
405 | EXPORT_SYMBOL(phy_detach); | |
406 | ||
407 | ||
00db8189 AF |
408 | /* Generic PHY support and helper functions */ |
409 | ||
b3df0da8 RD |
410 | /** |
411 | * genphy_config_advert - sanitize and advertise auto-negotation parameters | |
412 | * @phydev: target phy_device struct | |
00db8189 | 413 | * |
b3df0da8 | 414 | * Description: Writes MII_ADVERTISE with the appropriate values, |
00db8189 | 415 | * after sanitizing the values to make sure we only advertise |
51e2a384 TP |
416 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
417 | * hasn't changed, and > 0 if it has changed. | |
00db8189 | 418 | */ |
e1393456 | 419 | int genphy_config_advert(struct phy_device *phydev) |
00db8189 AF |
420 | { |
421 | u32 advertise; | |
51e2a384 TP |
422 | int oldadv, adv; |
423 | int err, changed = 0; | |
00db8189 AF |
424 | |
425 | /* Only allow advertising what | |
426 | * this PHY supports */ | |
427 | phydev->advertising &= phydev->supported; | |
428 | advertise = phydev->advertising; | |
429 | ||
430 | /* Setup standard advertisement */ | |
51e2a384 | 431 | oldadv = adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
432 | |
433 | if (adv < 0) | |
434 | return adv; | |
435 | ||
436 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | | |
437 | ADVERTISE_PAUSE_ASYM); | |
438 | if (advertise & ADVERTISED_10baseT_Half) | |
439 | adv |= ADVERTISE_10HALF; | |
440 | if (advertise & ADVERTISED_10baseT_Full) | |
441 | adv |= ADVERTISE_10FULL; | |
442 | if (advertise & ADVERTISED_100baseT_Half) | |
443 | adv |= ADVERTISE_100HALF; | |
444 | if (advertise & ADVERTISED_100baseT_Full) | |
445 | adv |= ADVERTISE_100FULL; | |
446 | if (advertise & ADVERTISED_Pause) | |
447 | adv |= ADVERTISE_PAUSE_CAP; | |
448 | if (advertise & ADVERTISED_Asym_Pause) | |
449 | adv |= ADVERTISE_PAUSE_ASYM; | |
450 | ||
51e2a384 TP |
451 | if (adv != oldadv) { |
452 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
00db8189 | 453 | |
51e2a384 TP |
454 | if (err < 0) |
455 | return err; | |
456 | changed = 1; | |
457 | } | |
00db8189 AF |
458 | |
459 | /* Configure gigabit if it's supported */ | |
460 | if (phydev->supported & (SUPPORTED_1000baseT_Half | | |
461 | SUPPORTED_1000baseT_Full)) { | |
51e2a384 | 462 | oldadv = adv = phy_read(phydev, MII_CTRL1000); |
00db8189 AF |
463 | |
464 | if (adv < 0) | |
465 | return adv; | |
466 | ||
467 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); | |
468 | if (advertise & SUPPORTED_1000baseT_Half) | |
469 | adv |= ADVERTISE_1000HALF; | |
470 | if (advertise & SUPPORTED_1000baseT_Full) | |
471 | adv |= ADVERTISE_1000FULL; | |
00db8189 | 472 | |
51e2a384 TP |
473 | if (adv != oldadv) { |
474 | err = phy_write(phydev, MII_CTRL1000, adv); | |
475 | ||
476 | if (err < 0) | |
477 | return err; | |
478 | changed = 1; | |
479 | } | |
00db8189 AF |
480 | } |
481 | ||
51e2a384 | 482 | return changed; |
00db8189 | 483 | } |
e1393456 | 484 | EXPORT_SYMBOL(genphy_config_advert); |
00db8189 | 485 | |
b3df0da8 RD |
486 | /** |
487 | * genphy_setup_forced - configures/forces speed/duplex from @phydev | |
488 | * @phydev: target phy_device struct | |
00db8189 | 489 | * |
b3df0da8 | 490 | * Description: Configures MII_BMCR to force speed/duplex |
00db8189 | 491 | * to the values in phydev. Assumes that the values are valid. |
b3df0da8 RD |
492 | * Please see phy_sanitize_settings(). |
493 | */ | |
00db8189 AF |
494 | int genphy_setup_forced(struct phy_device *phydev) |
495 | { | |
f62220d3 | 496 | int err; |
bc1e0a09 | 497 | int ctl = 0; |
00db8189 AF |
498 | |
499 | phydev->pause = phydev->asym_pause = 0; | |
500 | ||
501 | if (SPEED_1000 == phydev->speed) | |
502 | ctl |= BMCR_SPEED1000; | |
503 | else if (SPEED_100 == phydev->speed) | |
504 | ctl |= BMCR_SPEED100; | |
505 | ||
506 | if (DUPLEX_FULL == phydev->duplex) | |
507 | ctl |= BMCR_FULLDPLX; | |
508 | ||
f62220d3 | 509 | err = phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 510 | |
f62220d3 AF |
511 | if (err < 0) |
512 | return err; | |
513 | ||
514 | /* | |
515 | * Run the fixups on this PHY, just in case the | |
516 | * board code needs to change something after a reset | |
517 | */ | |
518 | err = phy_scan_fixups(phydev); | |
519 | ||
520 | if (err < 0) | |
521 | return err; | |
00db8189 AF |
522 | |
523 | /* We just reset the device, so we'd better configure any | |
524 | * settings the PHY requires to operate */ | |
525 | if (phydev->drv->config_init) | |
f62220d3 | 526 | err = phydev->drv->config_init(phydev); |
00db8189 | 527 | |
f62220d3 | 528 | return err; |
00db8189 AF |
529 | } |
530 | ||
531 | ||
b3df0da8 RD |
532 | /** |
533 | * genphy_restart_aneg - Enable and Restart Autonegotiation | |
534 | * @phydev: target phy_device struct | |
535 | */ | |
00db8189 AF |
536 | int genphy_restart_aneg(struct phy_device *phydev) |
537 | { | |
538 | int ctl; | |
539 | ||
540 | ctl = phy_read(phydev, MII_BMCR); | |
541 | ||
542 | if (ctl < 0) | |
543 | return ctl; | |
544 | ||
545 | ctl |= (BMCR_ANENABLE | BMCR_ANRESTART); | |
546 | ||
547 | /* Don't isolate the PHY if we're negotiating */ | |
548 | ctl &= ~(BMCR_ISOLATE); | |
549 | ||
550 | ctl = phy_write(phydev, MII_BMCR, ctl); | |
551 | ||
552 | return ctl; | |
553 | } | |
892871dc | 554 | EXPORT_SYMBOL(genphy_restart_aneg); |
00db8189 AF |
555 | |
556 | ||
b3df0da8 RD |
557 | /** |
558 | * genphy_config_aneg - restart auto-negotiation or write BMCR | |
559 | * @phydev: target phy_device struct | |
00db8189 | 560 | * |
b3df0da8 | 561 | * Description: If auto-negotiation is enabled, we configure the |
00db8189 | 562 | * advertising, and then restart auto-negotiation. If it is not |
b3df0da8 | 563 | * enabled, then we write the BMCR. |
00db8189 AF |
564 | */ |
565 | int genphy_config_aneg(struct phy_device *phydev) | |
566 | { | |
51e2a384 | 567 | int result = 0; |
00db8189 AF |
568 | |
569 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
51e2a384 | 570 | int result = genphy_config_advert(phydev); |
00db8189 | 571 | |
51e2a384 TP |
572 | if (result < 0) /* error */ |
573 | return result; | |
00db8189 | 574 | |
51e2a384 TP |
575 | /* Only restart aneg if we are advertising something different |
576 | * than we were before. */ | |
577 | if (result > 0) | |
578 | result = genphy_restart_aneg(phydev); | |
00db8189 | 579 | } else |
51e2a384 | 580 | result = genphy_setup_forced(phydev); |
00db8189 | 581 | |
51e2a384 | 582 | return result; |
00db8189 AF |
583 | } |
584 | EXPORT_SYMBOL(genphy_config_aneg); | |
585 | ||
b3df0da8 RD |
586 | /** |
587 | * genphy_update_link - update link status in @phydev | |
588 | * @phydev: target phy_device struct | |
00db8189 | 589 | * |
b3df0da8 | 590 | * Description: Update the value in phydev->link to reflect the |
00db8189 | 591 | * current link value. In order to do this, we need to read |
b3df0da8 | 592 | * the status register twice, keeping the second value. |
00db8189 AF |
593 | */ |
594 | int genphy_update_link(struct phy_device *phydev) | |
595 | { | |
596 | int status; | |
597 | ||
598 | /* Do a fake read */ | |
599 | status = phy_read(phydev, MII_BMSR); | |
600 | ||
601 | if (status < 0) | |
602 | return status; | |
603 | ||
604 | /* Read link and autonegotiation status */ | |
605 | status = phy_read(phydev, MII_BMSR); | |
606 | ||
607 | if (status < 0) | |
608 | return status; | |
609 | ||
610 | if ((status & BMSR_LSTATUS) == 0) | |
611 | phydev->link = 0; | |
612 | else | |
613 | phydev->link = 1; | |
614 | ||
615 | return 0; | |
616 | } | |
6b655529 | 617 | EXPORT_SYMBOL(genphy_update_link); |
00db8189 | 618 | |
b3df0da8 RD |
619 | /** |
620 | * genphy_read_status - check the link status and update current link state | |
621 | * @phydev: target phy_device struct | |
00db8189 | 622 | * |
b3df0da8 | 623 | * Description: Check the link, then figure out the current state |
00db8189 AF |
624 | * by comparing what we advertise with what the link partner |
625 | * advertises. Start by checking the gigabit possibilities, | |
626 | * then move on to 10/100. | |
627 | */ | |
628 | int genphy_read_status(struct phy_device *phydev) | |
629 | { | |
630 | int adv; | |
631 | int err; | |
632 | int lpa; | |
633 | int lpagb = 0; | |
634 | ||
635 | /* Update the link, but return if there | |
636 | * was an error */ | |
637 | err = genphy_update_link(phydev); | |
638 | if (err) | |
639 | return err; | |
640 | ||
641 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
642 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
643 | | SUPPORTED_1000baseT_Full)) { | |
644 | lpagb = phy_read(phydev, MII_STAT1000); | |
645 | ||
646 | if (lpagb < 0) | |
647 | return lpagb; | |
648 | ||
649 | adv = phy_read(phydev, MII_CTRL1000); | |
650 | ||
651 | if (adv < 0) | |
652 | return adv; | |
653 | ||
654 | lpagb &= adv << 2; | |
655 | } | |
656 | ||
657 | lpa = phy_read(phydev, MII_LPA); | |
658 | ||
659 | if (lpa < 0) | |
660 | return lpa; | |
661 | ||
662 | adv = phy_read(phydev, MII_ADVERTISE); | |
663 | ||
664 | if (adv < 0) | |
665 | return adv; | |
666 | ||
667 | lpa &= adv; | |
668 | ||
669 | phydev->speed = SPEED_10; | |
670 | phydev->duplex = DUPLEX_HALF; | |
671 | phydev->pause = phydev->asym_pause = 0; | |
672 | ||
673 | if (lpagb & (LPA_1000FULL | LPA_1000HALF)) { | |
674 | phydev->speed = SPEED_1000; | |
675 | ||
676 | if (lpagb & LPA_1000FULL) | |
677 | phydev->duplex = DUPLEX_FULL; | |
678 | } else if (lpa & (LPA_100FULL | LPA_100HALF)) { | |
679 | phydev->speed = SPEED_100; | |
680 | ||
681 | if (lpa & LPA_100FULL) | |
682 | phydev->duplex = DUPLEX_FULL; | |
683 | } else | |
684 | if (lpa & LPA_10FULL) | |
685 | phydev->duplex = DUPLEX_FULL; | |
686 | ||
687 | if (phydev->duplex == DUPLEX_FULL){ | |
688 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; | |
689 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
690 | } | |
691 | } else { | |
692 | int bmcr = phy_read(phydev, MII_BMCR); | |
693 | if (bmcr < 0) | |
694 | return bmcr; | |
695 | ||
696 | if (bmcr & BMCR_FULLDPLX) | |
697 | phydev->duplex = DUPLEX_FULL; | |
698 | else | |
699 | phydev->duplex = DUPLEX_HALF; | |
700 | ||
701 | if (bmcr & BMCR_SPEED1000) | |
702 | phydev->speed = SPEED_1000; | |
703 | else if (bmcr & BMCR_SPEED100) | |
704 | phydev->speed = SPEED_100; | |
705 | else | |
706 | phydev->speed = SPEED_10; | |
707 | ||
708 | phydev->pause = phydev->asym_pause = 0; | |
709 | } | |
710 | ||
711 | return 0; | |
712 | } | |
713 | EXPORT_SYMBOL(genphy_read_status); | |
714 | ||
715 | static int genphy_config_init(struct phy_device *phydev) | |
716 | { | |
84c22d79 | 717 | int val; |
00db8189 AF |
718 | u32 features; |
719 | ||
720 | /* For now, I'll claim that the generic driver supports | |
721 | * all possible port types */ | |
722 | features = (SUPPORTED_TP | SUPPORTED_MII | |
723 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
724 | SUPPORTED_BNC); | |
725 | ||
726 | /* Do we support autonegotiation? */ | |
727 | val = phy_read(phydev, MII_BMSR); | |
728 | ||
729 | if (val < 0) | |
730 | return val; | |
731 | ||
732 | if (val & BMSR_ANEGCAPABLE) | |
733 | features |= SUPPORTED_Autoneg; | |
734 | ||
735 | if (val & BMSR_100FULL) | |
736 | features |= SUPPORTED_100baseT_Full; | |
737 | if (val & BMSR_100HALF) | |
738 | features |= SUPPORTED_100baseT_Half; | |
739 | if (val & BMSR_10FULL) | |
740 | features |= SUPPORTED_10baseT_Full; | |
741 | if (val & BMSR_10HALF) | |
742 | features |= SUPPORTED_10baseT_Half; | |
743 | ||
744 | if (val & BMSR_ESTATEN) { | |
745 | val = phy_read(phydev, MII_ESTATUS); | |
746 | ||
747 | if (val < 0) | |
748 | return val; | |
749 | ||
750 | if (val & ESTATUS_1000_TFULL) | |
751 | features |= SUPPORTED_1000baseT_Full; | |
752 | if (val & ESTATUS_1000_THALF) | |
753 | features |= SUPPORTED_1000baseT_Half; | |
754 | } | |
755 | ||
756 | phydev->supported = features; | |
757 | phydev->advertising = features; | |
758 | ||
759 | return 0; | |
760 | } | |
761 | ||
762 | ||
b3df0da8 RD |
763 | /** |
764 | * phy_probe - probe and init a PHY device | |
765 | * @dev: device to probe and init | |
00db8189 | 766 | * |
b3df0da8 | 767 | * Description: Take care of setting up the phy_device structure, |
00db8189 AF |
768 | * set the state to READY (the driver's init function should |
769 | * set it to STARTING if needed). | |
770 | */ | |
771 | static int phy_probe(struct device *dev) | |
772 | { | |
773 | struct phy_device *phydev; | |
774 | struct phy_driver *phydrv; | |
775 | struct device_driver *drv; | |
776 | int err = 0; | |
777 | ||
778 | phydev = to_phy_device(dev); | |
779 | ||
780 | /* Make sure the driver is held. | |
781 | * XXX -- Is this correct? */ | |
782 | drv = get_driver(phydev->dev.driver); | |
783 | phydrv = to_phy_driver(drv); | |
784 | phydev->drv = phydrv; | |
785 | ||
786 | /* Disable the interrupt if the PHY doesn't support it */ | |
787 | if (!(phydrv->flags & PHY_HAS_INTERRUPT)) | |
788 | phydev->irq = PHY_POLL; | |
789 | ||
35b5f6b1 | 790 | mutex_lock(&phydev->lock); |
00db8189 AF |
791 | |
792 | /* Start out supporting everything. Eventually, | |
793 | * a controller will attach, and may modify one | |
794 | * or both of these values */ | |
795 | phydev->supported = phydrv->features; | |
796 | phydev->advertising = phydrv->features; | |
797 | ||
798 | /* Set the state to READY by default */ | |
799 | phydev->state = PHY_READY; | |
800 | ||
801 | if (phydev->drv->probe) | |
802 | err = phydev->drv->probe(phydev); | |
803 | ||
35b5f6b1 | 804 | mutex_unlock(&phydev->lock); |
00db8189 | 805 | |
00db8189 | 806 | return err; |
e8a2b6a4 | 807 | |
00db8189 AF |
808 | } |
809 | ||
810 | static int phy_remove(struct device *dev) | |
811 | { | |
812 | struct phy_device *phydev; | |
813 | ||
814 | phydev = to_phy_device(dev); | |
815 | ||
35b5f6b1 | 816 | mutex_lock(&phydev->lock); |
00db8189 | 817 | phydev->state = PHY_DOWN; |
35b5f6b1 | 818 | mutex_unlock(&phydev->lock); |
00db8189 AF |
819 | |
820 | if (phydev->drv->remove) | |
821 | phydev->drv->remove(phydev); | |
822 | ||
823 | put_driver(dev->driver); | |
824 | phydev->drv = NULL; | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
b3df0da8 RD |
829 | /** |
830 | * phy_driver_register - register a phy_driver with the PHY layer | |
831 | * @new_driver: new phy_driver to register | |
832 | */ | |
00db8189 AF |
833 | int phy_driver_register(struct phy_driver *new_driver) |
834 | { | |
835 | int retval; | |
836 | ||
837 | memset(&new_driver->driver, 0, sizeof(new_driver->driver)); | |
838 | new_driver->driver.name = new_driver->name; | |
839 | new_driver->driver.bus = &mdio_bus_type; | |
840 | new_driver->driver.probe = phy_probe; | |
841 | new_driver->driver.remove = phy_remove; | |
842 | ||
843 | retval = driver_register(&new_driver->driver); | |
844 | ||
845 | if (retval) { | |
846 | printk(KERN_ERR "%s: Error %d in registering driver\n", | |
847 | new_driver->name, retval); | |
848 | ||
849 | return retval; | |
850 | } | |
851 | ||
f2511f13 | 852 | pr_debug("%s: Registered new driver\n", new_driver->name); |
00db8189 AF |
853 | |
854 | return 0; | |
855 | } | |
856 | EXPORT_SYMBOL(phy_driver_register); | |
857 | ||
858 | void phy_driver_unregister(struct phy_driver *drv) | |
859 | { | |
860 | driver_unregister(&drv->driver); | |
861 | } | |
862 | EXPORT_SYMBOL(phy_driver_unregister); | |
863 | ||
e1393456 AF |
864 | static struct phy_driver genphy_driver = { |
865 | .phy_id = 0xffffffff, | |
866 | .phy_id_mask = 0xffffffff, | |
867 | .name = "Generic PHY", | |
868 | .config_init = genphy_config_init, | |
869 | .features = 0, | |
870 | .config_aneg = genphy_config_aneg, | |
871 | .read_status = genphy_read_status, | |
872 | .driver = {.owner= THIS_MODULE, }, | |
873 | }; | |
00db8189 | 874 | |
67c4f3fa | 875 | static int __init phy_init(void) |
00db8189 | 876 | { |
67c4f3fa | 877 | int rc; |
67c4f3fa JG |
878 | |
879 | rc = mdio_bus_init(); | |
880 | if (rc) | |
e1393456 | 881 | return rc; |
00db8189 | 882 | |
e1393456 AF |
883 | rc = phy_driver_register(&genphy_driver); |
884 | if (rc) | |
885 | mdio_bus_exit(); | |
67c4f3fa | 886 | |
67c4f3fa | 887 | return rc; |
00db8189 AF |
888 | } |
889 | ||
67c4f3fa | 890 | static void __exit phy_exit(void) |
00db8189 AF |
891 | { |
892 | phy_driver_unregister(&genphy_driver); | |
e1393456 | 893 | mdio_bus_exit(); |
00db8189 AF |
894 | } |
895 | ||
e1393456 | 896 | subsys_initcall(phy_init); |
67c4f3fa | 897 | module_exit(phy_exit); |