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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; | |
8626d3b4 | 152 | |
11b0bacd VB |
153 | /* We allocate the device, and initialize the |
154 | * default values */ | |
cd861280 | 155 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
11b0bacd VB |
156 | |
157 | if (NULL == dev) | |
158 | return (struct phy_device*) PTR_ERR((void*)-ENOMEM); | |
159 | ||
6f4a7f41 AV |
160 | dev->dev.release = phy_device_release; |
161 | ||
11b0bacd VB |
162 | dev->speed = 0; |
163 | dev->duplex = -1; | |
164 | dev->pause = dev->asym_pause = 0; | |
165 | dev->link = 1; | |
e8a2b6a4 | 166 | dev->interface = PHY_INTERFACE_MODE_GMII; |
11b0bacd VB |
167 | |
168 | dev->autoneg = AUTONEG_ENABLE; | |
169 | ||
170 | dev->addr = addr; | |
171 | dev->phy_id = phy_id; | |
172 | dev->bus = bus; | |
4dea547f GL |
173 | dev->dev.parent = bus->parent; |
174 | dev->dev.bus = &mdio_bus_type; | |
175 | dev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL; | |
176 | dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr); | |
11b0bacd VB |
177 | |
178 | dev->state = PHY_DOWN; | |
179 | ||
35b5f6b1 | 180 | mutex_init(&dev->lock); |
4f9c85a1 | 181 | INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); |
11b0bacd | 182 | |
8626d3b4 DW |
183 | /* Request the appropriate module unconditionally; don't |
184 | bother trying to do so only if it isn't already loaded, | |
185 | because that gets complicated. A hotplug event would have | |
186 | done an unconditional modprobe anyway. | |
187 | We don't do normal hotplug because it won't work for MDIO | |
188 | -- because it relies on the device staying around for long | |
189 | enough for the driver to get loaded. With MDIO, the NIC | |
190 | driver will get bored and give up as soon as it finds that | |
191 | there's no driver _already_ loaded. */ | |
192 | request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id)); | |
193 | ||
11b0bacd VB |
194 | return dev; |
195 | } | |
196 | EXPORT_SYMBOL(phy_device_create); | |
197 | ||
b3df0da8 | 198 | /** |
cac1f3c8 | 199 | * get_phy_id - reads the specified addr for its ID. |
b3df0da8 RD |
200 | * @bus: the target MII bus |
201 | * @addr: PHY address on the MII bus | |
cac1f3c8 | 202 | * @phy_id: where to store the ID retrieved. |
00db8189 | 203 | * |
b3df0da8 | 204 | * Description: Reads the ID registers of the PHY at @addr on the |
cac1f3c8 | 205 | * @bus, stores it in @phy_id and returns zero on success. |
00db8189 | 206 | */ |
cac1f3c8 | 207 | int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id) |
00db8189 AF |
208 | { |
209 | int phy_reg; | |
00db8189 AF |
210 | |
211 | /* Grab the bits from PHYIR1, and put them | |
212 | * in the upper half */ | |
213 | phy_reg = bus->read(bus, addr, MII_PHYSID1); | |
214 | ||
215 | if (phy_reg < 0) | |
cac1f3c8 | 216 | return -EIO; |
00db8189 | 217 | |
cac1f3c8 | 218 | *phy_id = (phy_reg & 0xffff) << 16; |
00db8189 AF |
219 | |
220 | /* Grab the bits from PHYIR2, and put them in the lower half */ | |
221 | phy_reg = bus->read(bus, addr, MII_PHYSID2); | |
222 | ||
223 | if (phy_reg < 0) | |
cac1f3c8 PG |
224 | return -EIO; |
225 | ||
226 | *phy_id |= (phy_reg & 0xffff); | |
227 | ||
228 | return 0; | |
229 | } | |
a01b3d76 | 230 | EXPORT_SYMBOL(get_phy_id); |
cac1f3c8 PG |
231 | |
232 | /** | |
233 | * get_phy_device - reads the specified PHY device and returns its @phy_device struct | |
234 | * @bus: the target MII bus | |
235 | * @addr: PHY address on the MII bus | |
236 | * | |
237 | * Description: Reads the ID registers of the PHY at @addr on the | |
238 | * @bus, then allocates and returns the phy_device to represent it. | |
239 | */ | |
240 | struct phy_device * get_phy_device(struct mii_bus *bus, int addr) | |
241 | { | |
242 | struct phy_device *dev = NULL; | |
243 | u32 phy_id; | |
244 | int r; | |
00db8189 | 245 | |
cac1f3c8 PG |
246 | r = get_phy_id(bus, addr, &phy_id); |
247 | if (r) | |
248 | return ERR_PTR(r); | |
00db8189 | 249 | |
6436cbcd GC |
250 | /* If the phy_id is mostly Fs, there is no device there */ |
251 | if ((phy_id & 0x1fffffff) == 0x1fffffff) | |
252 | return NULL; | |
253 | ||
11b0bacd | 254 | dev = phy_device_create(bus, addr, phy_id); |
00db8189 AF |
255 | |
256 | return dev; | |
257 | } | |
4dea547f GL |
258 | EXPORT_SYMBOL(get_phy_device); |
259 | ||
260 | /** | |
261 | * phy_device_register - Register the phy device on the MDIO bus | |
1d4ac5d5 | 262 | * @phydev: phy_device structure to be added to the MDIO bus |
4dea547f GL |
263 | */ |
264 | int phy_device_register(struct phy_device *phydev) | |
265 | { | |
266 | int err; | |
267 | ||
268 | /* Don't register a phy if one is already registered at this | |
269 | * address */ | |
270 | if (phydev->bus->phy_map[phydev->addr]) | |
271 | return -EINVAL; | |
272 | phydev->bus->phy_map[phydev->addr] = phydev; | |
273 | ||
274 | /* Run all of the fixups for this PHY */ | |
275 | phy_scan_fixups(phydev); | |
276 | ||
277 | err = device_register(&phydev->dev); | |
278 | if (err) { | |
279 | pr_err("phy %d failed to register\n", phydev->addr); | |
280 | goto out; | |
281 | } | |
282 | ||
283 | return 0; | |
284 | ||
285 | out: | |
286 | phydev->bus->phy_map[phydev->addr] = NULL; | |
287 | return err; | |
288 | } | |
289 | EXPORT_SYMBOL(phy_device_register); | |
00db8189 | 290 | |
f8f76db1 JP |
291 | /** |
292 | * phy_find_first - finds the first PHY device on the bus | |
293 | * @bus: the target MII bus | |
294 | */ | |
295 | struct phy_device *phy_find_first(struct mii_bus *bus) | |
296 | { | |
297 | int addr; | |
298 | ||
299 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { | |
300 | if (bus->phy_map[addr]) | |
301 | return bus->phy_map[addr]; | |
302 | } | |
303 | return NULL; | |
304 | } | |
305 | EXPORT_SYMBOL(phy_find_first); | |
306 | ||
b3df0da8 RD |
307 | /** |
308 | * phy_prepare_link - prepares the PHY layer to monitor link status | |
309 | * @phydev: target phy_device struct | |
310 | * @handler: callback function for link status change notifications | |
00db8189 | 311 | * |
b3df0da8 | 312 | * Description: Tells the PHY infrastructure to handle the |
00db8189 AF |
313 | * gory details on monitoring link status (whether through |
314 | * polling or an interrupt), and to call back to the | |
315 | * connected device driver when the link status changes. | |
316 | * If you want to monitor your own link state, don't call | |
b3df0da8 RD |
317 | * this function. |
318 | */ | |
00db8189 AF |
319 | void phy_prepare_link(struct phy_device *phydev, |
320 | void (*handler)(struct net_device *)) | |
321 | { | |
322 | phydev->adjust_link = handler; | |
323 | } | |
324 | ||
fa94f6d9 GL |
325 | /** |
326 | * phy_connect_direct - connect an ethernet device to a specific phy_device | |
327 | * @dev: the network device to connect | |
328 | * @phydev: the pointer to the phy device | |
329 | * @handler: callback function for state change notifications | |
330 | * @flags: PHY device's dev_flags | |
331 | * @interface: PHY device's interface | |
332 | */ | |
333 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, | |
334 | void (*handler)(struct net_device *), u32 flags, | |
335 | phy_interface_t interface) | |
336 | { | |
337 | int rc; | |
338 | ||
339 | rc = phy_attach_direct(dev, phydev, flags, interface); | |
340 | if (rc) | |
341 | return rc; | |
342 | ||
343 | phy_prepare_link(phydev, handler); | |
344 | phy_start_machine(phydev, NULL); | |
345 | if (phydev->irq > 0) | |
346 | phy_start_interrupts(phydev); | |
347 | ||
348 | return 0; | |
349 | } | |
350 | EXPORT_SYMBOL(phy_connect_direct); | |
351 | ||
b3df0da8 RD |
352 | /** |
353 | * phy_connect - connect an ethernet device to a PHY device | |
354 | * @dev: the network device to connect | |
5d12b132 | 355 | * @bus_id: the id string of the PHY device to connect |
b3df0da8 RD |
356 | * @handler: callback function for state change notifications |
357 | * @flags: PHY device's dev_flags | |
358 | * @interface: PHY device's interface | |
e1393456 | 359 | * |
b3df0da8 | 360 | * Description: Convenience function for connecting ethernet |
e1393456 AF |
361 | * devices to PHY devices. The default behavior is for |
362 | * the PHY infrastructure to handle everything, and only notify | |
363 | * the connected driver when the link status changes. If you | |
364 | * don't want, or can't use the provided functionality, you may | |
365 | * choose to call only the subset of functions which provide | |
366 | * the desired functionality. | |
367 | */ | |
f62220d3 | 368 | struct phy_device * phy_connect(struct net_device *dev, const char *bus_id, |
e8a2b6a4 | 369 | void (*handler)(struct net_device *), u32 flags, |
1a168934 | 370 | phy_interface_t interface) |
e1393456 AF |
371 | { |
372 | struct phy_device *phydev; | |
fa94f6d9 GL |
373 | struct device *d; |
374 | int rc; | |
e1393456 | 375 | |
fa94f6d9 GL |
376 | /* Search the list of PHY devices on the mdio bus for the |
377 | * PHY with the requested name */ | |
378 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); | |
379 | if (!d) { | |
380 | pr_err("PHY %s not found\n", bus_id); | |
381 | return ERR_PTR(-ENODEV); | |
382 | } | |
383 | phydev = to_phy_device(d); | |
e1393456 | 384 | |
fa94f6d9 GL |
385 | rc = phy_connect_direct(dev, phydev, handler, flags, interface); |
386 | if (rc) | |
387 | return ERR_PTR(rc); | |
e1393456 AF |
388 | |
389 | return phydev; | |
390 | } | |
391 | EXPORT_SYMBOL(phy_connect); | |
392 | ||
b3df0da8 RD |
393 | /** |
394 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY device | |
395 | * @phydev: target phy_device struct | |
396 | */ | |
e1393456 AF |
397 | void phy_disconnect(struct phy_device *phydev) |
398 | { | |
399 | if (phydev->irq > 0) | |
400 | phy_stop_interrupts(phydev); | |
401 | ||
402 | phy_stop_machine(phydev); | |
403 | ||
404 | phydev->adjust_link = NULL; | |
405 | ||
406 | phy_detach(phydev); | |
407 | } | |
408 | EXPORT_SYMBOL(phy_disconnect); | |
409 | ||
2f5cb434 AV |
410 | int phy_init_hw(struct phy_device *phydev) |
411 | { | |
412 | int ret; | |
413 | ||
414 | if (!phydev->drv || !phydev->drv->config_init) | |
415 | return 0; | |
416 | ||
417 | ret = phy_scan_fixups(phydev); | |
418 | if (ret < 0) | |
419 | return ret; | |
420 | ||
421 | return phydev->drv->config_init(phydev); | |
422 | } | |
423 | ||
b3df0da8 | 424 | /** |
fa94f6d9 | 425 | * phy_attach_direct - attach a network device to a given PHY device pointer |
b3df0da8 | 426 | * @dev: network device to attach |
fa94f6d9 | 427 | * @phydev: Pointer to phy_device to attach |
b3df0da8 RD |
428 | * @flags: PHY device's dev_flags |
429 | * @interface: PHY device's interface | |
e1393456 | 430 | * |
b3df0da8 | 431 | * Description: Called by drivers to attach to a particular PHY |
e1393456 AF |
432 | * device. The phy_device is found, and properly hooked up |
433 | * to the phy_driver. If no driver is attached, then the | |
434 | * genphy_driver is used. The phy_device is given a ptr to | |
435 | * the attaching device, and given a callback for link status | |
b3df0da8 | 436 | * change. The phy_device is returned to the attaching driver. |
e1393456 | 437 | */ |
fa94f6d9 GL |
438 | int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
439 | u32 flags, phy_interface_t interface) | |
e1393456 | 440 | { |
fa94f6d9 | 441 | struct device *d = &phydev->dev; |
e1393456 AF |
442 | |
443 | /* Assume that if there is no driver, that it doesn't | |
444 | * exist, and we should use the genphy driver. */ | |
445 | if (NULL == d->driver) { | |
446 | int err; | |
e1393456 AF |
447 | d->driver = &genphy_driver.driver; |
448 | ||
449 | err = d->driver->probe(d); | |
b7a00ecd JG |
450 | if (err >= 0) |
451 | err = device_bind_driver(d); | |
e1393456 | 452 | |
b7a00ecd | 453 | if (err) |
fa94f6d9 | 454 | return err; |
e1393456 AF |
455 | } |
456 | ||
457 | if (phydev->attached_dev) { | |
fa94f6d9 GL |
458 | dev_err(&dev->dev, "PHY already attached\n"); |
459 | return -EBUSY; | |
e1393456 AF |
460 | } |
461 | ||
462 | phydev->attached_dev = dev; | |
c1f19b51 | 463 | dev->phydev = phydev; |
e1393456 AF |
464 | |
465 | phydev->dev_flags = flags; | |
466 | ||
e8a2b6a4 AF |
467 | phydev->interface = interface; |
468 | ||
469 | /* Do initial configuration here, now that | |
470 | * we have certain key parameters | |
471 | * (dev_flags and interface) */ | |
2f5cb434 | 472 | return phy_init_hw(phydev); |
fa94f6d9 GL |
473 | } |
474 | EXPORT_SYMBOL(phy_attach_direct); | |
475 | ||
476 | /** | |
477 | * phy_attach - attach a network device to a particular PHY device | |
478 | * @dev: network device to attach | |
479 | * @bus_id: Bus ID of PHY device to attach | |
480 | * @flags: PHY device's dev_flags | |
481 | * @interface: PHY device's interface | |
482 | * | |
483 | * Description: Same as phy_attach_direct() except that a PHY bus_id | |
484 | * string is passed instead of a pointer to a struct phy_device. | |
485 | */ | |
486 | struct phy_device *phy_attach(struct net_device *dev, | |
487 | const char *bus_id, u32 flags, phy_interface_t interface) | |
488 | { | |
489 | struct bus_type *bus = &mdio_bus_type; | |
490 | struct phy_device *phydev; | |
491 | struct device *d; | |
492 | int rc; | |
493 | ||
494 | /* Search the list of PHY devices on the mdio bus for the | |
495 | * PHY with the requested name */ | |
496 | d = bus_find_device_by_name(bus, NULL, bus_id); | |
497 | if (!d) { | |
498 | pr_err("PHY %s not found\n", bus_id); | |
499 | return ERR_PTR(-ENODEV); | |
e8a2b6a4 | 500 | } |
fa94f6d9 GL |
501 | phydev = to_phy_device(d); |
502 | ||
503 | rc = phy_attach_direct(dev, phydev, flags, interface); | |
504 | if (rc) | |
505 | return ERR_PTR(rc); | |
e8a2b6a4 | 506 | |
e1393456 AF |
507 | return phydev; |
508 | } | |
509 | EXPORT_SYMBOL(phy_attach); | |
510 | ||
b3df0da8 RD |
511 | /** |
512 | * phy_detach - detach a PHY device from its network device | |
513 | * @phydev: target phy_device struct | |
514 | */ | |
e1393456 AF |
515 | void phy_detach(struct phy_device *phydev) |
516 | { | |
c1f19b51 | 517 | phydev->attached_dev->phydev = NULL; |
e1393456 AF |
518 | phydev->attached_dev = NULL; |
519 | ||
520 | /* If the device had no specific driver before (i.e. - it | |
521 | * was using the generic driver), we unbind the device | |
522 | * from the generic driver so that there's a chance a | |
523 | * real driver could be loaded */ | |
87aebe07 | 524 | if (phydev->dev.driver == &genphy_driver.driver) |
e1393456 | 525 | device_release_driver(&phydev->dev); |
e1393456 AF |
526 | } |
527 | EXPORT_SYMBOL(phy_detach); | |
528 | ||
529 | ||
00db8189 AF |
530 | /* Generic PHY support and helper functions */ |
531 | ||
b3df0da8 RD |
532 | /** |
533 | * genphy_config_advert - sanitize and advertise auto-negotation parameters | |
534 | * @phydev: target phy_device struct | |
00db8189 | 535 | * |
b3df0da8 | 536 | * Description: Writes MII_ADVERTISE with the appropriate values, |
00db8189 | 537 | * after sanitizing the values to make sure we only advertise |
51e2a384 TP |
538 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
539 | * hasn't changed, and > 0 if it has changed. | |
00db8189 | 540 | */ |
e1393456 | 541 | int genphy_config_advert(struct phy_device *phydev) |
00db8189 AF |
542 | { |
543 | u32 advertise; | |
51e2a384 TP |
544 | int oldadv, adv; |
545 | int err, changed = 0; | |
00db8189 AF |
546 | |
547 | /* Only allow advertising what | |
548 | * this PHY supports */ | |
549 | phydev->advertising &= phydev->supported; | |
550 | advertise = phydev->advertising; | |
551 | ||
552 | /* Setup standard advertisement */ | |
51e2a384 | 553 | oldadv = adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
554 | |
555 | if (adv < 0) | |
556 | return adv; | |
557 | ||
558 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | | |
559 | ADVERTISE_PAUSE_ASYM); | |
560 | if (advertise & ADVERTISED_10baseT_Half) | |
561 | adv |= ADVERTISE_10HALF; | |
562 | if (advertise & ADVERTISED_10baseT_Full) | |
563 | adv |= ADVERTISE_10FULL; | |
564 | if (advertise & ADVERTISED_100baseT_Half) | |
565 | adv |= ADVERTISE_100HALF; | |
566 | if (advertise & ADVERTISED_100baseT_Full) | |
567 | adv |= ADVERTISE_100FULL; | |
568 | if (advertise & ADVERTISED_Pause) | |
569 | adv |= ADVERTISE_PAUSE_CAP; | |
570 | if (advertise & ADVERTISED_Asym_Pause) | |
571 | adv |= ADVERTISE_PAUSE_ASYM; | |
572 | ||
51e2a384 TP |
573 | if (adv != oldadv) { |
574 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
00db8189 | 575 | |
51e2a384 TP |
576 | if (err < 0) |
577 | return err; | |
578 | changed = 1; | |
579 | } | |
00db8189 AF |
580 | |
581 | /* Configure gigabit if it's supported */ | |
582 | if (phydev->supported & (SUPPORTED_1000baseT_Half | | |
583 | SUPPORTED_1000baseT_Full)) { | |
51e2a384 | 584 | oldadv = adv = phy_read(phydev, MII_CTRL1000); |
00db8189 AF |
585 | |
586 | if (adv < 0) | |
587 | return adv; | |
588 | ||
589 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); | |
590 | if (advertise & SUPPORTED_1000baseT_Half) | |
591 | adv |= ADVERTISE_1000HALF; | |
592 | if (advertise & SUPPORTED_1000baseT_Full) | |
593 | adv |= ADVERTISE_1000FULL; | |
00db8189 | 594 | |
51e2a384 TP |
595 | if (adv != oldadv) { |
596 | err = phy_write(phydev, MII_CTRL1000, adv); | |
597 | ||
598 | if (err < 0) | |
599 | return err; | |
600 | changed = 1; | |
601 | } | |
00db8189 AF |
602 | } |
603 | ||
51e2a384 | 604 | return changed; |
00db8189 | 605 | } |
e1393456 | 606 | EXPORT_SYMBOL(genphy_config_advert); |
00db8189 | 607 | |
b3df0da8 RD |
608 | /** |
609 | * genphy_setup_forced - configures/forces speed/duplex from @phydev | |
610 | * @phydev: target phy_device struct | |
00db8189 | 611 | * |
b3df0da8 | 612 | * Description: Configures MII_BMCR to force speed/duplex |
00db8189 | 613 | * to the values in phydev. Assumes that the values are valid. |
b3df0da8 RD |
614 | * Please see phy_sanitize_settings(). |
615 | */ | |
00db8189 AF |
616 | int genphy_setup_forced(struct phy_device *phydev) |
617 | { | |
f62220d3 | 618 | int err; |
bc1e0a09 | 619 | int ctl = 0; |
00db8189 AF |
620 | |
621 | phydev->pause = phydev->asym_pause = 0; | |
622 | ||
623 | if (SPEED_1000 == phydev->speed) | |
624 | ctl |= BMCR_SPEED1000; | |
625 | else if (SPEED_100 == phydev->speed) | |
626 | ctl |= BMCR_SPEED100; | |
627 | ||
628 | if (DUPLEX_FULL == phydev->duplex) | |
629 | ctl |= BMCR_FULLDPLX; | |
630 | ||
f62220d3 | 631 | err = phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 632 | |
f62220d3 | 633 | return err; |
00db8189 AF |
634 | } |
635 | ||
636 | ||
b3df0da8 RD |
637 | /** |
638 | * genphy_restart_aneg - Enable and Restart Autonegotiation | |
639 | * @phydev: target phy_device struct | |
640 | */ | |
00db8189 AF |
641 | int genphy_restart_aneg(struct phy_device *phydev) |
642 | { | |
643 | int ctl; | |
644 | ||
645 | ctl = phy_read(phydev, MII_BMCR); | |
646 | ||
647 | if (ctl < 0) | |
648 | return ctl; | |
649 | ||
650 | ctl |= (BMCR_ANENABLE | BMCR_ANRESTART); | |
651 | ||
652 | /* Don't isolate the PHY if we're negotiating */ | |
653 | ctl &= ~(BMCR_ISOLATE); | |
654 | ||
655 | ctl = phy_write(phydev, MII_BMCR, ctl); | |
656 | ||
657 | return ctl; | |
658 | } | |
892871dc | 659 | EXPORT_SYMBOL(genphy_restart_aneg); |
00db8189 AF |
660 | |
661 | ||
b3df0da8 RD |
662 | /** |
663 | * genphy_config_aneg - restart auto-negotiation or write BMCR | |
664 | * @phydev: target phy_device struct | |
00db8189 | 665 | * |
b3df0da8 | 666 | * Description: If auto-negotiation is enabled, we configure the |
00db8189 | 667 | * advertising, and then restart auto-negotiation. If it is not |
b3df0da8 | 668 | * enabled, then we write the BMCR. |
00db8189 AF |
669 | */ |
670 | int genphy_config_aneg(struct phy_device *phydev) | |
671 | { | |
de339c2a | 672 | int result; |
00db8189 | 673 | |
de339c2a TP |
674 | if (AUTONEG_ENABLE != phydev->autoneg) |
675 | return genphy_setup_forced(phydev); | |
00db8189 | 676 | |
de339c2a | 677 | result = genphy_config_advert(phydev); |
00db8189 | 678 | |
de339c2a TP |
679 | if (result < 0) /* error */ |
680 | return result; | |
681 | ||
682 | if (result == 0) { | |
683 | /* Advertisment hasn't changed, but maybe aneg was never on to | |
684 | * begin with? Or maybe phy was isolated? */ | |
685 | int ctl = phy_read(phydev, MII_BMCR); | |
686 | ||
687 | if (ctl < 0) | |
688 | return ctl; | |
689 | ||
690 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) | |
691 | result = 1; /* do restart aneg */ | |
692 | } | |
693 | ||
694 | /* Only restart aneg if we are advertising something different | |
695 | * than we were before. */ | |
696 | if (result > 0) | |
697 | result = genphy_restart_aneg(phydev); | |
00db8189 | 698 | |
51e2a384 | 699 | return result; |
00db8189 AF |
700 | } |
701 | EXPORT_SYMBOL(genphy_config_aneg); | |
702 | ||
b3df0da8 RD |
703 | /** |
704 | * genphy_update_link - update link status in @phydev | |
705 | * @phydev: target phy_device struct | |
00db8189 | 706 | * |
b3df0da8 | 707 | * Description: Update the value in phydev->link to reflect the |
00db8189 | 708 | * current link value. In order to do this, we need to read |
b3df0da8 | 709 | * the status register twice, keeping the second value. |
00db8189 AF |
710 | */ |
711 | int genphy_update_link(struct phy_device *phydev) | |
712 | { | |
713 | int status; | |
714 | ||
715 | /* Do a fake read */ | |
716 | status = phy_read(phydev, MII_BMSR); | |
717 | ||
718 | if (status < 0) | |
719 | return status; | |
720 | ||
721 | /* Read link and autonegotiation status */ | |
722 | status = phy_read(phydev, MII_BMSR); | |
723 | ||
724 | if (status < 0) | |
725 | return status; | |
726 | ||
727 | if ((status & BMSR_LSTATUS) == 0) | |
728 | phydev->link = 0; | |
729 | else | |
730 | phydev->link = 1; | |
731 | ||
732 | return 0; | |
733 | } | |
6b655529 | 734 | EXPORT_SYMBOL(genphy_update_link); |
00db8189 | 735 | |
b3df0da8 RD |
736 | /** |
737 | * genphy_read_status - check the link status and update current link state | |
738 | * @phydev: target phy_device struct | |
00db8189 | 739 | * |
b3df0da8 | 740 | * Description: Check the link, then figure out the current state |
00db8189 AF |
741 | * by comparing what we advertise with what the link partner |
742 | * advertises. Start by checking the gigabit possibilities, | |
743 | * then move on to 10/100. | |
744 | */ | |
745 | int genphy_read_status(struct phy_device *phydev) | |
746 | { | |
747 | int adv; | |
748 | int err; | |
749 | int lpa; | |
750 | int lpagb = 0; | |
751 | ||
752 | /* Update the link, but return if there | |
753 | * was an error */ | |
754 | err = genphy_update_link(phydev); | |
755 | if (err) | |
756 | return err; | |
757 | ||
758 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
759 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
760 | | SUPPORTED_1000baseT_Full)) { | |
761 | lpagb = phy_read(phydev, MII_STAT1000); | |
762 | ||
763 | if (lpagb < 0) | |
764 | return lpagb; | |
765 | ||
766 | adv = phy_read(phydev, MII_CTRL1000); | |
767 | ||
768 | if (adv < 0) | |
769 | return adv; | |
770 | ||
771 | lpagb &= adv << 2; | |
772 | } | |
773 | ||
774 | lpa = phy_read(phydev, MII_LPA); | |
775 | ||
776 | if (lpa < 0) | |
777 | return lpa; | |
778 | ||
779 | adv = phy_read(phydev, MII_ADVERTISE); | |
780 | ||
781 | if (adv < 0) | |
782 | return adv; | |
783 | ||
784 | lpa &= adv; | |
785 | ||
786 | phydev->speed = SPEED_10; | |
787 | phydev->duplex = DUPLEX_HALF; | |
788 | phydev->pause = phydev->asym_pause = 0; | |
789 | ||
790 | if (lpagb & (LPA_1000FULL | LPA_1000HALF)) { | |
791 | phydev->speed = SPEED_1000; | |
792 | ||
793 | if (lpagb & LPA_1000FULL) | |
794 | phydev->duplex = DUPLEX_FULL; | |
795 | } else if (lpa & (LPA_100FULL | LPA_100HALF)) { | |
796 | phydev->speed = SPEED_100; | |
797 | ||
798 | if (lpa & LPA_100FULL) | |
799 | phydev->duplex = DUPLEX_FULL; | |
800 | } else | |
801 | if (lpa & LPA_10FULL) | |
802 | phydev->duplex = DUPLEX_FULL; | |
803 | ||
804 | if (phydev->duplex == DUPLEX_FULL){ | |
805 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; | |
806 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
807 | } | |
808 | } else { | |
809 | int bmcr = phy_read(phydev, MII_BMCR); | |
810 | if (bmcr < 0) | |
811 | return bmcr; | |
812 | ||
813 | if (bmcr & BMCR_FULLDPLX) | |
814 | phydev->duplex = DUPLEX_FULL; | |
815 | else | |
816 | phydev->duplex = DUPLEX_HALF; | |
817 | ||
818 | if (bmcr & BMCR_SPEED1000) | |
819 | phydev->speed = SPEED_1000; | |
820 | else if (bmcr & BMCR_SPEED100) | |
821 | phydev->speed = SPEED_100; | |
822 | else | |
823 | phydev->speed = SPEED_10; | |
824 | ||
825 | phydev->pause = phydev->asym_pause = 0; | |
826 | } | |
827 | ||
828 | return 0; | |
829 | } | |
830 | EXPORT_SYMBOL(genphy_read_status); | |
831 | ||
832 | static int genphy_config_init(struct phy_device *phydev) | |
833 | { | |
84c22d79 | 834 | int val; |
00db8189 AF |
835 | u32 features; |
836 | ||
837 | /* For now, I'll claim that the generic driver supports | |
838 | * all possible port types */ | |
839 | features = (SUPPORTED_TP | SUPPORTED_MII | |
840 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
841 | SUPPORTED_BNC); | |
842 | ||
843 | /* Do we support autonegotiation? */ | |
844 | val = phy_read(phydev, MII_BMSR); | |
845 | ||
846 | if (val < 0) | |
847 | return val; | |
848 | ||
849 | if (val & BMSR_ANEGCAPABLE) | |
850 | features |= SUPPORTED_Autoneg; | |
851 | ||
852 | if (val & BMSR_100FULL) | |
853 | features |= SUPPORTED_100baseT_Full; | |
854 | if (val & BMSR_100HALF) | |
855 | features |= SUPPORTED_100baseT_Half; | |
856 | if (val & BMSR_10FULL) | |
857 | features |= SUPPORTED_10baseT_Full; | |
858 | if (val & BMSR_10HALF) | |
859 | features |= SUPPORTED_10baseT_Half; | |
860 | ||
861 | if (val & BMSR_ESTATEN) { | |
862 | val = phy_read(phydev, MII_ESTATUS); | |
863 | ||
864 | if (val < 0) | |
865 | return val; | |
866 | ||
867 | if (val & ESTATUS_1000_TFULL) | |
868 | features |= SUPPORTED_1000baseT_Full; | |
869 | if (val & ESTATUS_1000_THALF) | |
870 | features |= SUPPORTED_1000baseT_Half; | |
871 | } | |
872 | ||
873 | phydev->supported = features; | |
874 | phydev->advertising = features; | |
875 | ||
876 | return 0; | |
877 | } | |
0f0ca340 GC |
878 | int genphy_suspend(struct phy_device *phydev) |
879 | { | |
880 | int value; | |
881 | ||
882 | mutex_lock(&phydev->lock); | |
883 | ||
884 | value = phy_read(phydev, MII_BMCR); | |
885 | phy_write(phydev, MII_BMCR, (value | BMCR_PDOWN)); | |
886 | ||
887 | mutex_unlock(&phydev->lock); | |
888 | ||
889 | return 0; | |
890 | } | |
891 | EXPORT_SYMBOL(genphy_suspend); | |
00db8189 | 892 | |
0f0ca340 GC |
893 | int genphy_resume(struct phy_device *phydev) |
894 | { | |
895 | int value; | |
896 | ||
897 | mutex_lock(&phydev->lock); | |
898 | ||
899 | value = phy_read(phydev, MII_BMCR); | |
900 | phy_write(phydev, MII_BMCR, (value & ~BMCR_PDOWN)); | |
901 | ||
902 | mutex_unlock(&phydev->lock); | |
903 | ||
904 | return 0; | |
905 | } | |
906 | EXPORT_SYMBOL(genphy_resume); | |
00db8189 | 907 | |
b3df0da8 RD |
908 | /** |
909 | * phy_probe - probe and init a PHY device | |
910 | * @dev: device to probe and init | |
00db8189 | 911 | * |
b3df0da8 | 912 | * Description: Take care of setting up the phy_device structure, |
00db8189 AF |
913 | * set the state to READY (the driver's init function should |
914 | * set it to STARTING if needed). | |
915 | */ | |
916 | static int phy_probe(struct device *dev) | |
917 | { | |
918 | struct phy_device *phydev; | |
919 | struct phy_driver *phydrv; | |
920 | struct device_driver *drv; | |
921 | int err = 0; | |
922 | ||
923 | phydev = to_phy_device(dev); | |
924 | ||
925 | /* Make sure the driver is held. | |
926 | * XXX -- Is this correct? */ | |
927 | drv = get_driver(phydev->dev.driver); | |
928 | phydrv = to_phy_driver(drv); | |
929 | phydev->drv = phydrv; | |
930 | ||
931 | /* Disable the interrupt if the PHY doesn't support it */ | |
932 | if (!(phydrv->flags & PHY_HAS_INTERRUPT)) | |
933 | phydev->irq = PHY_POLL; | |
934 | ||
35b5f6b1 | 935 | mutex_lock(&phydev->lock); |
00db8189 AF |
936 | |
937 | /* Start out supporting everything. Eventually, | |
938 | * a controller will attach, and may modify one | |
939 | * or both of these values */ | |
940 | phydev->supported = phydrv->features; | |
941 | phydev->advertising = phydrv->features; | |
942 | ||
943 | /* Set the state to READY by default */ | |
944 | phydev->state = PHY_READY; | |
945 | ||
946 | if (phydev->drv->probe) | |
947 | err = phydev->drv->probe(phydev); | |
948 | ||
35b5f6b1 | 949 | mutex_unlock(&phydev->lock); |
00db8189 | 950 | |
00db8189 | 951 | return err; |
e8a2b6a4 | 952 | |
00db8189 AF |
953 | } |
954 | ||
955 | static int phy_remove(struct device *dev) | |
956 | { | |
957 | struct phy_device *phydev; | |
958 | ||
959 | phydev = to_phy_device(dev); | |
960 | ||
35b5f6b1 | 961 | mutex_lock(&phydev->lock); |
00db8189 | 962 | phydev->state = PHY_DOWN; |
35b5f6b1 | 963 | mutex_unlock(&phydev->lock); |
00db8189 AF |
964 | |
965 | if (phydev->drv->remove) | |
966 | phydev->drv->remove(phydev); | |
967 | ||
968 | put_driver(dev->driver); | |
969 | phydev->drv = NULL; | |
970 | ||
971 | return 0; | |
972 | } | |
973 | ||
b3df0da8 RD |
974 | /** |
975 | * phy_driver_register - register a phy_driver with the PHY layer | |
976 | * @new_driver: new phy_driver to register | |
977 | */ | |
00db8189 AF |
978 | int phy_driver_register(struct phy_driver *new_driver) |
979 | { | |
980 | int retval; | |
981 | ||
00db8189 AF |
982 | new_driver->driver.name = new_driver->name; |
983 | new_driver->driver.bus = &mdio_bus_type; | |
984 | new_driver->driver.probe = phy_probe; | |
985 | new_driver->driver.remove = phy_remove; | |
986 | ||
987 | retval = driver_register(&new_driver->driver); | |
988 | ||
989 | if (retval) { | |
990 | printk(KERN_ERR "%s: Error %d in registering driver\n", | |
991 | new_driver->name, retval); | |
992 | ||
993 | return retval; | |
994 | } | |
995 | ||
f2511f13 | 996 | pr_debug("%s: Registered new driver\n", new_driver->name); |
00db8189 AF |
997 | |
998 | return 0; | |
999 | } | |
1000 | EXPORT_SYMBOL(phy_driver_register); | |
1001 | ||
1002 | void phy_driver_unregister(struct phy_driver *drv) | |
1003 | { | |
1004 | driver_unregister(&drv->driver); | |
1005 | } | |
1006 | EXPORT_SYMBOL(phy_driver_unregister); | |
1007 | ||
e1393456 AF |
1008 | static struct phy_driver genphy_driver = { |
1009 | .phy_id = 0xffffffff, | |
1010 | .phy_id_mask = 0xffffffff, | |
1011 | .name = "Generic PHY", | |
1012 | .config_init = genphy_config_init, | |
1013 | .features = 0, | |
1014 | .config_aneg = genphy_config_aneg, | |
1015 | .read_status = genphy_read_status, | |
0f0ca340 GC |
1016 | .suspend = genphy_suspend, |
1017 | .resume = genphy_resume, | |
e1393456 AF |
1018 | .driver = {.owner= THIS_MODULE, }, |
1019 | }; | |
00db8189 | 1020 | |
67c4f3fa | 1021 | static int __init phy_init(void) |
00db8189 | 1022 | { |
67c4f3fa | 1023 | int rc; |
67c4f3fa JG |
1024 | |
1025 | rc = mdio_bus_init(); | |
1026 | if (rc) | |
e1393456 | 1027 | return rc; |
00db8189 | 1028 | |
e1393456 AF |
1029 | rc = phy_driver_register(&genphy_driver); |
1030 | if (rc) | |
1031 | mdio_bus_exit(); | |
67c4f3fa | 1032 | |
67c4f3fa | 1033 | return rc; |
00db8189 AF |
1034 | } |
1035 | ||
67c4f3fa | 1036 | static void __exit phy_exit(void) |
00db8189 AF |
1037 | { |
1038 | phy_driver_unregister(&genphy_driver); | |
e1393456 | 1039 | mdio_bus_exit(); |
00db8189 AF |
1040 | } |
1041 | ||
e1393456 | 1042 | subsys_initcall(phy_init); |
67c4f3fa | 1043 | module_exit(phy_exit); |