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