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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 AF |
17 | #include <linux/kernel.h> |
18 | #include <linux/sched.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/unistd.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/netdevice.h> | |
27 | #include <linux/etherdevice.h> | |
28 | #include <linux/skbuff.h> | |
29 | #include <linux/spinlock.h> | |
30 | #include <linux/mm.h> | |
31 | #include <linux/module.h> | |
00db8189 AF |
32 | #include <linux/mii.h> |
33 | #include <linux/ethtool.h> | |
34 | #include <linux/phy.h> | |
35 | ||
36 | #include <asm/io.h> | |
37 | #include <asm/irq.h> | |
38 | #include <asm/uaccess.h> | |
39 | ||
afcceaa3 OH |
40 | MODULE_DESCRIPTION("PHY library"); |
41 | MODULE_AUTHOR("Andy Fleming"); | |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
e1393456 AF |
44 | static struct phy_driver genphy_driver; |
45 | extern int mdio_bus_init(void); | |
46 | extern void mdio_bus_exit(void); | |
67c4f3fa | 47 | |
11b0bacd VB |
48 | struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id) |
49 | { | |
50 | struct phy_device *dev; | |
51 | /* We allocate the device, and initialize the | |
52 | * default values */ | |
cd861280 | 53 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
11b0bacd VB |
54 | |
55 | if (NULL == dev) | |
56 | return (struct phy_device*) PTR_ERR((void*)-ENOMEM); | |
57 | ||
58 | dev->speed = 0; | |
59 | dev->duplex = -1; | |
60 | dev->pause = dev->asym_pause = 0; | |
61 | dev->link = 1; | |
e8a2b6a4 | 62 | dev->interface = PHY_INTERFACE_MODE_GMII; |
11b0bacd VB |
63 | |
64 | dev->autoneg = AUTONEG_ENABLE; | |
65 | ||
66 | dev->addr = addr; | |
67 | dev->phy_id = phy_id; | |
68 | dev->bus = bus; | |
69 | ||
70 | dev->state = PHY_DOWN; | |
71 | ||
72 | spin_lock_init(&dev->lock); | |
73 | ||
74 | return dev; | |
75 | } | |
76 | EXPORT_SYMBOL(phy_device_create); | |
77 | ||
00db8189 AF |
78 | /* get_phy_device |
79 | * | |
80 | * description: Reads the ID registers of the PHY at addr on the | |
81 | * bus, then allocates and returns the phy_device to | |
82 | * represent it. | |
83 | */ | |
84 | struct phy_device * get_phy_device(struct mii_bus *bus, int addr) | |
85 | { | |
86 | int phy_reg; | |
87 | u32 phy_id; | |
88 | struct phy_device *dev = NULL; | |
89 | ||
90 | /* Grab the bits from PHYIR1, and put them | |
91 | * in the upper half */ | |
92 | phy_reg = bus->read(bus, addr, MII_PHYSID1); | |
93 | ||
94 | if (phy_reg < 0) | |
95 | return ERR_PTR(phy_reg); | |
96 | ||
97 | phy_id = (phy_reg & 0xffff) << 16; | |
98 | ||
99 | /* Grab the bits from PHYIR2, and put them in the lower half */ | |
100 | phy_reg = bus->read(bus, addr, MII_PHYSID2); | |
101 | ||
102 | if (phy_reg < 0) | |
103 | return ERR_PTR(phy_reg); | |
104 | ||
105 | phy_id |= (phy_reg & 0xffff); | |
106 | ||
107 | /* If the phy_id is all Fs, there is no device there */ | |
108 | if (0xffffffff == phy_id) | |
109 | return NULL; | |
110 | ||
11b0bacd | 111 | dev = phy_device_create(bus, addr, phy_id); |
00db8189 AF |
112 | |
113 | return dev; | |
114 | } | |
115 | ||
116 | /* phy_prepare_link: | |
117 | * | |
118 | * description: Tells the PHY infrastructure to handle the | |
119 | * gory details on monitoring link status (whether through | |
120 | * polling or an interrupt), and to call back to the | |
121 | * connected device driver when the link status changes. | |
122 | * If you want to monitor your own link state, don't call | |
123 | * this function */ | |
124 | void phy_prepare_link(struct phy_device *phydev, | |
125 | void (*handler)(struct net_device *)) | |
126 | { | |
127 | phydev->adjust_link = handler; | |
128 | } | |
129 | ||
e1393456 AF |
130 | /* phy_connect: |
131 | * | |
132 | * description: Convenience function for connecting ethernet | |
133 | * devices to PHY devices. The default behavior is for | |
134 | * the PHY infrastructure to handle everything, and only notify | |
135 | * the connected driver when the link status changes. If you | |
136 | * don't want, or can't use the provided functionality, you may | |
137 | * choose to call only the subset of functions which provide | |
138 | * the desired functionality. | |
139 | */ | |
140 | struct phy_device * phy_connect(struct net_device *dev, const char *phy_id, | |
e8a2b6a4 AF |
141 | void (*handler)(struct net_device *), u32 flags, |
142 | u32 interface) | |
e1393456 AF |
143 | { |
144 | struct phy_device *phydev; | |
145 | ||
e8a2b6a4 | 146 | phydev = phy_attach(dev, phy_id, flags, interface); |
e1393456 AF |
147 | |
148 | if (IS_ERR(phydev)) | |
149 | return phydev; | |
150 | ||
151 | phy_prepare_link(phydev, handler); | |
152 | ||
153 | phy_start_machine(phydev, NULL); | |
154 | ||
155 | if (phydev->irq > 0) | |
156 | phy_start_interrupts(phydev); | |
157 | ||
158 | return phydev; | |
159 | } | |
160 | EXPORT_SYMBOL(phy_connect); | |
161 | ||
162 | void phy_disconnect(struct phy_device *phydev) | |
163 | { | |
164 | if (phydev->irq > 0) | |
165 | phy_stop_interrupts(phydev); | |
166 | ||
167 | phy_stop_machine(phydev); | |
168 | ||
169 | phydev->adjust_link = NULL; | |
170 | ||
171 | phy_detach(phydev); | |
172 | } | |
173 | EXPORT_SYMBOL(phy_disconnect); | |
174 | ||
e1393456 AF |
175 | /* phy_attach: |
176 | * | |
177 | * description: Called by drivers to attach to a particular PHY | |
178 | * device. The phy_device is found, and properly hooked up | |
179 | * to the phy_driver. If no driver is attached, then the | |
180 | * genphy_driver is used. The phy_device is given a ptr to | |
181 | * the attaching device, and given a callback for link status | |
182 | * change. The phy_device is returned to the attaching | |
183 | * driver. | |
184 | */ | |
185 | static int phy_compare_id(struct device *dev, void *data) | |
186 | { | |
187 | return strcmp((char *)data, dev->bus_id) ? 0 : 1; | |
188 | } | |
189 | ||
190 | struct phy_device *phy_attach(struct net_device *dev, | |
e8a2b6a4 | 191 | const char *phy_id, u32 flags, u32 interface) |
e1393456 AF |
192 | { |
193 | struct bus_type *bus = &mdio_bus_type; | |
194 | struct phy_device *phydev; | |
195 | struct device *d; | |
196 | ||
197 | /* Search the list of PHY devices on the mdio bus for the | |
198 | * PHY with the requested name */ | |
199 | d = bus_find_device(bus, NULL, (void *)phy_id, phy_compare_id); | |
200 | ||
201 | if (d) { | |
202 | phydev = to_phy_device(d); | |
203 | } else { | |
204 | printk(KERN_ERR "%s not found\n", phy_id); | |
205 | return ERR_PTR(-ENODEV); | |
206 | } | |
207 | ||
208 | /* Assume that if there is no driver, that it doesn't | |
209 | * exist, and we should use the genphy driver. */ | |
210 | if (NULL == d->driver) { | |
211 | int err; | |
212 | down_write(&d->bus->subsys.rwsem); | |
213 | d->driver = &genphy_driver.driver; | |
214 | ||
215 | err = d->driver->probe(d); | |
216 | ||
b7a00ecd JG |
217 | if (err >= 0) |
218 | err = device_bind_driver(d); | |
e1393456 | 219 | |
e1393456 | 220 | up_write(&d->bus->subsys.rwsem); |
b7a00ecd JG |
221 | |
222 | if (err) | |
223 | return ERR_PTR(err); | |
e1393456 AF |
224 | } |
225 | ||
226 | if (phydev->attached_dev) { | |
227 | printk(KERN_ERR "%s: %s already attached\n", | |
228 | dev->name, phy_id); | |
229 | return ERR_PTR(-EBUSY); | |
230 | } | |
231 | ||
232 | phydev->attached_dev = dev; | |
233 | ||
234 | phydev->dev_flags = flags; | |
235 | ||
e8a2b6a4 AF |
236 | phydev->interface = interface; |
237 | ||
238 | /* Do initial configuration here, now that | |
239 | * we have certain key parameters | |
240 | * (dev_flags and interface) */ | |
241 | if (phydev->drv->config_init) { | |
242 | int err; | |
243 | ||
244 | err = phydev->drv->config_init(phydev); | |
245 | ||
246 | if (err < 0) | |
247 | return ERR_PTR(err); | |
248 | } | |
249 | ||
e1393456 AF |
250 | return phydev; |
251 | } | |
252 | EXPORT_SYMBOL(phy_attach); | |
253 | ||
254 | void phy_detach(struct phy_device *phydev) | |
255 | { | |
256 | phydev->attached_dev = NULL; | |
257 | ||
258 | /* If the device had no specific driver before (i.e. - it | |
259 | * was using the generic driver), we unbind the device | |
260 | * from the generic driver so that there's a chance a | |
261 | * real driver could be loaded */ | |
262 | if (phydev->dev.driver == &genphy_driver.driver) { | |
263 | down_write(&phydev->dev.bus->subsys.rwsem); | |
264 | device_release_driver(&phydev->dev); | |
265 | up_write(&phydev->dev.bus->subsys.rwsem); | |
266 | } | |
267 | } | |
268 | EXPORT_SYMBOL(phy_detach); | |
269 | ||
270 | ||
00db8189 AF |
271 | /* Generic PHY support and helper functions */ |
272 | ||
273 | /* genphy_config_advert | |
274 | * | |
275 | * description: Writes MII_ADVERTISE with the appropriate values, | |
276 | * after sanitizing the values to make sure we only advertise | |
277 | * what is supported | |
278 | */ | |
e1393456 | 279 | int genphy_config_advert(struct phy_device *phydev) |
00db8189 AF |
280 | { |
281 | u32 advertise; | |
282 | int adv; | |
283 | int err; | |
284 | ||
285 | /* Only allow advertising what | |
286 | * this PHY supports */ | |
287 | phydev->advertising &= phydev->supported; | |
288 | advertise = phydev->advertising; | |
289 | ||
290 | /* Setup standard advertisement */ | |
291 | adv = phy_read(phydev, MII_ADVERTISE); | |
292 | ||
293 | if (adv < 0) | |
294 | return adv; | |
295 | ||
296 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | | |
297 | ADVERTISE_PAUSE_ASYM); | |
298 | if (advertise & ADVERTISED_10baseT_Half) | |
299 | adv |= ADVERTISE_10HALF; | |
300 | if (advertise & ADVERTISED_10baseT_Full) | |
301 | adv |= ADVERTISE_10FULL; | |
302 | if (advertise & ADVERTISED_100baseT_Half) | |
303 | adv |= ADVERTISE_100HALF; | |
304 | if (advertise & ADVERTISED_100baseT_Full) | |
305 | adv |= ADVERTISE_100FULL; | |
306 | if (advertise & ADVERTISED_Pause) | |
307 | adv |= ADVERTISE_PAUSE_CAP; | |
308 | if (advertise & ADVERTISED_Asym_Pause) | |
309 | adv |= ADVERTISE_PAUSE_ASYM; | |
310 | ||
311 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
312 | ||
313 | if (err < 0) | |
314 | return err; | |
315 | ||
316 | /* Configure gigabit if it's supported */ | |
317 | if (phydev->supported & (SUPPORTED_1000baseT_Half | | |
318 | SUPPORTED_1000baseT_Full)) { | |
319 | adv = phy_read(phydev, MII_CTRL1000); | |
320 | ||
321 | if (adv < 0) | |
322 | return adv; | |
323 | ||
324 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); | |
325 | if (advertise & SUPPORTED_1000baseT_Half) | |
326 | adv |= ADVERTISE_1000HALF; | |
327 | if (advertise & SUPPORTED_1000baseT_Full) | |
328 | adv |= ADVERTISE_1000FULL; | |
329 | err = phy_write(phydev, MII_CTRL1000, adv); | |
330 | ||
331 | if (err < 0) | |
332 | return err; | |
333 | } | |
334 | ||
335 | return adv; | |
336 | } | |
e1393456 | 337 | EXPORT_SYMBOL(genphy_config_advert); |
00db8189 AF |
338 | |
339 | /* genphy_setup_forced | |
340 | * | |
341 | * description: Configures MII_BMCR to force speed/duplex | |
342 | * to the values in phydev. Assumes that the values are valid. | |
343 | * Please see phy_sanitize_settings() */ | |
344 | int genphy_setup_forced(struct phy_device *phydev) | |
345 | { | |
346 | int ctl = BMCR_RESET; | |
347 | ||
348 | phydev->pause = phydev->asym_pause = 0; | |
349 | ||
350 | if (SPEED_1000 == phydev->speed) | |
351 | ctl |= BMCR_SPEED1000; | |
352 | else if (SPEED_100 == phydev->speed) | |
353 | ctl |= BMCR_SPEED100; | |
354 | ||
355 | if (DUPLEX_FULL == phydev->duplex) | |
356 | ctl |= BMCR_FULLDPLX; | |
357 | ||
358 | ctl = phy_write(phydev, MII_BMCR, ctl); | |
359 | ||
360 | if (ctl < 0) | |
361 | return ctl; | |
362 | ||
363 | /* We just reset the device, so we'd better configure any | |
364 | * settings the PHY requires to operate */ | |
365 | if (phydev->drv->config_init) | |
366 | ctl = phydev->drv->config_init(phydev); | |
367 | ||
368 | return ctl; | |
369 | } | |
370 | ||
371 | ||
372 | /* Enable and Restart Autonegotiation */ | |
373 | int genphy_restart_aneg(struct phy_device *phydev) | |
374 | { | |
375 | int ctl; | |
376 | ||
377 | ctl = phy_read(phydev, MII_BMCR); | |
378 | ||
379 | if (ctl < 0) | |
380 | return ctl; | |
381 | ||
382 | ctl |= (BMCR_ANENABLE | BMCR_ANRESTART); | |
383 | ||
384 | /* Don't isolate the PHY if we're negotiating */ | |
385 | ctl &= ~(BMCR_ISOLATE); | |
386 | ||
387 | ctl = phy_write(phydev, MII_BMCR, ctl); | |
388 | ||
389 | return ctl; | |
390 | } | |
391 | ||
392 | ||
393 | /* genphy_config_aneg | |
394 | * | |
395 | * description: If auto-negotiation is enabled, we configure the | |
396 | * advertising, and then restart auto-negotiation. If it is not | |
397 | * enabled, then we write the BMCR | |
398 | */ | |
399 | int genphy_config_aneg(struct phy_device *phydev) | |
400 | { | |
401 | int err = 0; | |
402 | ||
403 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
404 | err = genphy_config_advert(phydev); | |
405 | ||
406 | if (err < 0) | |
407 | return err; | |
408 | ||
409 | err = genphy_restart_aneg(phydev); | |
410 | } else | |
411 | err = genphy_setup_forced(phydev); | |
412 | ||
413 | return err; | |
414 | } | |
415 | EXPORT_SYMBOL(genphy_config_aneg); | |
416 | ||
417 | /* genphy_update_link | |
418 | * | |
419 | * description: Update the value in phydev->link to reflect the | |
420 | * current link value. In order to do this, we need to read | |
421 | * the status register twice, keeping the second value | |
422 | */ | |
423 | int genphy_update_link(struct phy_device *phydev) | |
424 | { | |
425 | int status; | |
426 | ||
427 | /* Do a fake read */ | |
428 | status = phy_read(phydev, MII_BMSR); | |
429 | ||
430 | if (status < 0) | |
431 | return status; | |
432 | ||
433 | /* Read link and autonegotiation status */ | |
434 | status = phy_read(phydev, MII_BMSR); | |
435 | ||
436 | if (status < 0) | |
437 | return status; | |
438 | ||
439 | if ((status & BMSR_LSTATUS) == 0) | |
440 | phydev->link = 0; | |
441 | else | |
442 | phydev->link = 1; | |
443 | ||
444 | return 0; | |
445 | } | |
6b655529 | 446 | EXPORT_SYMBOL(genphy_update_link); |
00db8189 AF |
447 | |
448 | /* genphy_read_status | |
449 | * | |
450 | * description: Check the link, then figure out the current state | |
451 | * by comparing what we advertise with what the link partner | |
452 | * advertises. Start by checking the gigabit possibilities, | |
453 | * then move on to 10/100. | |
454 | */ | |
455 | int genphy_read_status(struct phy_device *phydev) | |
456 | { | |
457 | int adv; | |
458 | int err; | |
459 | int lpa; | |
460 | int lpagb = 0; | |
461 | ||
462 | /* Update the link, but return if there | |
463 | * was an error */ | |
464 | err = genphy_update_link(phydev); | |
465 | if (err) | |
466 | return err; | |
467 | ||
468 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
469 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
470 | | SUPPORTED_1000baseT_Full)) { | |
471 | lpagb = phy_read(phydev, MII_STAT1000); | |
472 | ||
473 | if (lpagb < 0) | |
474 | return lpagb; | |
475 | ||
476 | adv = phy_read(phydev, MII_CTRL1000); | |
477 | ||
478 | if (adv < 0) | |
479 | return adv; | |
480 | ||
481 | lpagb &= adv << 2; | |
482 | } | |
483 | ||
484 | lpa = phy_read(phydev, MII_LPA); | |
485 | ||
486 | if (lpa < 0) | |
487 | return lpa; | |
488 | ||
489 | adv = phy_read(phydev, MII_ADVERTISE); | |
490 | ||
491 | if (adv < 0) | |
492 | return adv; | |
493 | ||
494 | lpa &= adv; | |
495 | ||
496 | phydev->speed = SPEED_10; | |
497 | phydev->duplex = DUPLEX_HALF; | |
498 | phydev->pause = phydev->asym_pause = 0; | |
499 | ||
500 | if (lpagb & (LPA_1000FULL | LPA_1000HALF)) { | |
501 | phydev->speed = SPEED_1000; | |
502 | ||
503 | if (lpagb & LPA_1000FULL) | |
504 | phydev->duplex = DUPLEX_FULL; | |
505 | } else if (lpa & (LPA_100FULL | LPA_100HALF)) { | |
506 | phydev->speed = SPEED_100; | |
507 | ||
508 | if (lpa & LPA_100FULL) | |
509 | phydev->duplex = DUPLEX_FULL; | |
510 | } else | |
511 | if (lpa & LPA_10FULL) | |
512 | phydev->duplex = DUPLEX_FULL; | |
513 | ||
514 | if (phydev->duplex == DUPLEX_FULL){ | |
515 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; | |
516 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
517 | } | |
518 | } else { | |
519 | int bmcr = phy_read(phydev, MII_BMCR); | |
520 | if (bmcr < 0) | |
521 | return bmcr; | |
522 | ||
523 | if (bmcr & BMCR_FULLDPLX) | |
524 | phydev->duplex = DUPLEX_FULL; | |
525 | else | |
526 | phydev->duplex = DUPLEX_HALF; | |
527 | ||
528 | if (bmcr & BMCR_SPEED1000) | |
529 | phydev->speed = SPEED_1000; | |
530 | else if (bmcr & BMCR_SPEED100) | |
531 | phydev->speed = SPEED_100; | |
532 | else | |
533 | phydev->speed = SPEED_10; | |
534 | ||
535 | phydev->pause = phydev->asym_pause = 0; | |
536 | } | |
537 | ||
538 | return 0; | |
539 | } | |
540 | EXPORT_SYMBOL(genphy_read_status); | |
541 | ||
542 | static int genphy_config_init(struct phy_device *phydev) | |
543 | { | |
84c22d79 | 544 | int val; |
00db8189 AF |
545 | u32 features; |
546 | ||
547 | /* For now, I'll claim that the generic driver supports | |
548 | * all possible port types */ | |
549 | features = (SUPPORTED_TP | SUPPORTED_MII | |
550 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
551 | SUPPORTED_BNC); | |
552 | ||
553 | /* Do we support autonegotiation? */ | |
554 | val = phy_read(phydev, MII_BMSR); | |
555 | ||
556 | if (val < 0) | |
557 | return val; | |
558 | ||
559 | if (val & BMSR_ANEGCAPABLE) | |
560 | features |= SUPPORTED_Autoneg; | |
561 | ||
562 | if (val & BMSR_100FULL) | |
563 | features |= SUPPORTED_100baseT_Full; | |
564 | if (val & BMSR_100HALF) | |
565 | features |= SUPPORTED_100baseT_Half; | |
566 | if (val & BMSR_10FULL) | |
567 | features |= SUPPORTED_10baseT_Full; | |
568 | if (val & BMSR_10HALF) | |
569 | features |= SUPPORTED_10baseT_Half; | |
570 | ||
571 | if (val & BMSR_ESTATEN) { | |
572 | val = phy_read(phydev, MII_ESTATUS); | |
573 | ||
574 | if (val < 0) | |
575 | return val; | |
576 | ||
577 | if (val & ESTATUS_1000_TFULL) | |
578 | features |= SUPPORTED_1000baseT_Full; | |
579 | if (val & ESTATUS_1000_THALF) | |
580 | features |= SUPPORTED_1000baseT_Half; | |
581 | } | |
582 | ||
583 | phydev->supported = features; | |
584 | phydev->advertising = features; | |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
589 | ||
590 | /* phy_probe | |
591 | * | |
592 | * description: Take care of setting up the phy_device structure, | |
593 | * set the state to READY (the driver's init function should | |
594 | * set it to STARTING if needed). | |
595 | */ | |
596 | static int phy_probe(struct device *dev) | |
597 | { | |
598 | struct phy_device *phydev; | |
599 | struct phy_driver *phydrv; | |
600 | struct device_driver *drv; | |
601 | int err = 0; | |
602 | ||
603 | phydev = to_phy_device(dev); | |
604 | ||
605 | /* Make sure the driver is held. | |
606 | * XXX -- Is this correct? */ | |
607 | drv = get_driver(phydev->dev.driver); | |
608 | phydrv = to_phy_driver(drv); | |
609 | phydev->drv = phydrv; | |
610 | ||
611 | /* Disable the interrupt if the PHY doesn't support it */ | |
612 | if (!(phydrv->flags & PHY_HAS_INTERRUPT)) | |
613 | phydev->irq = PHY_POLL; | |
614 | ||
615 | spin_lock(&phydev->lock); | |
616 | ||
617 | /* Start out supporting everything. Eventually, | |
618 | * a controller will attach, and may modify one | |
619 | * or both of these values */ | |
620 | phydev->supported = phydrv->features; | |
621 | phydev->advertising = phydrv->features; | |
622 | ||
623 | /* Set the state to READY by default */ | |
624 | phydev->state = PHY_READY; | |
625 | ||
626 | if (phydev->drv->probe) | |
627 | err = phydev->drv->probe(phydev); | |
628 | ||
629 | spin_unlock(&phydev->lock); | |
630 | ||
00db8189 | 631 | return err; |
e8a2b6a4 | 632 | |
00db8189 AF |
633 | } |
634 | ||
635 | static int phy_remove(struct device *dev) | |
636 | { | |
637 | struct phy_device *phydev; | |
638 | ||
639 | phydev = to_phy_device(dev); | |
640 | ||
641 | spin_lock(&phydev->lock); | |
642 | phydev->state = PHY_DOWN; | |
643 | spin_unlock(&phydev->lock); | |
644 | ||
645 | if (phydev->drv->remove) | |
646 | phydev->drv->remove(phydev); | |
647 | ||
648 | put_driver(dev->driver); | |
649 | phydev->drv = NULL; | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
654 | int phy_driver_register(struct phy_driver *new_driver) | |
655 | { | |
656 | int retval; | |
657 | ||
658 | memset(&new_driver->driver, 0, sizeof(new_driver->driver)); | |
659 | new_driver->driver.name = new_driver->name; | |
660 | new_driver->driver.bus = &mdio_bus_type; | |
661 | new_driver->driver.probe = phy_probe; | |
662 | new_driver->driver.remove = phy_remove; | |
663 | ||
664 | retval = driver_register(&new_driver->driver); | |
665 | ||
666 | if (retval) { | |
667 | printk(KERN_ERR "%s: Error %d in registering driver\n", | |
668 | new_driver->name, retval); | |
669 | ||
670 | return retval; | |
671 | } | |
672 | ||
673 | pr_info("%s: Registered new driver\n", new_driver->name); | |
674 | ||
675 | return 0; | |
676 | } | |
677 | EXPORT_SYMBOL(phy_driver_register); | |
678 | ||
679 | void phy_driver_unregister(struct phy_driver *drv) | |
680 | { | |
681 | driver_unregister(&drv->driver); | |
682 | } | |
683 | EXPORT_SYMBOL(phy_driver_unregister); | |
684 | ||
e1393456 AF |
685 | static struct phy_driver genphy_driver = { |
686 | .phy_id = 0xffffffff, | |
687 | .phy_id_mask = 0xffffffff, | |
688 | .name = "Generic PHY", | |
689 | .config_init = genphy_config_init, | |
690 | .features = 0, | |
691 | .config_aneg = genphy_config_aneg, | |
692 | .read_status = genphy_read_status, | |
693 | .driver = {.owner= THIS_MODULE, }, | |
694 | }; | |
00db8189 | 695 | |
67c4f3fa | 696 | static int __init phy_init(void) |
00db8189 | 697 | { |
67c4f3fa | 698 | int rc; |
67c4f3fa JG |
699 | |
700 | rc = mdio_bus_init(); | |
701 | if (rc) | |
e1393456 | 702 | return rc; |
00db8189 | 703 | |
e1393456 AF |
704 | rc = phy_driver_register(&genphy_driver); |
705 | if (rc) | |
706 | mdio_bus_exit(); | |
67c4f3fa | 707 | |
67c4f3fa | 708 | return rc; |
00db8189 AF |
709 | } |
710 | ||
67c4f3fa | 711 | static void __exit phy_exit(void) |
00db8189 AF |
712 | { |
713 | phy_driver_unregister(&genphy_driver); | |
e1393456 | 714 | mdio_bus_exit(); |
00db8189 AF |
715 | } |
716 | ||
e1393456 | 717 | subsys_initcall(phy_init); |
67c4f3fa | 718 | module_exit(phy_exit); |