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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> | |
28 | #include <linux/spinlock.h> | |
29 | #include <linux/mm.h> | |
30 | #include <linux/module.h> | |
00db8189 AF |
31 | #include <linux/mii.h> |
32 | #include <linux/ethtool.h> | |
33 | #include <linux/phy.h> | |
34 | ||
35 | #include <asm/io.h> | |
36 | #include <asm/irq.h> | |
37 | #include <asm/uaccess.h> | |
38 | ||
afcceaa3 OH |
39 | MODULE_DESCRIPTION("PHY library"); |
40 | MODULE_AUTHOR("Andy Fleming"); | |
41 | MODULE_LICENSE("GPL"); | |
42 | ||
e1393456 AF |
43 | static struct phy_driver genphy_driver; |
44 | extern int mdio_bus_init(void); | |
45 | extern void mdio_bus_exit(void); | |
67c4f3fa | 46 | |
6f4a7f41 AV |
47 | void phy_device_free(struct phy_device *phydev) |
48 | { | |
49 | kfree(phydev); | |
50 | } | |
51 | ||
52 | static void phy_device_release(struct device *dev) | |
53 | { | |
54 | phy_device_free(to_phy_device(dev)); | |
55 | } | |
56 | ||
11b0bacd VB |
57 | struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id) |
58 | { | |
59 | struct phy_device *dev; | |
60 | /* We allocate the device, and initialize the | |
61 | * default values */ | |
cd861280 | 62 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
11b0bacd VB |
63 | |
64 | if (NULL == dev) | |
65 | return (struct phy_device*) PTR_ERR((void*)-ENOMEM); | |
66 | ||
6f4a7f41 AV |
67 | dev->dev.release = phy_device_release; |
68 | ||
11b0bacd VB |
69 | dev->speed = 0; |
70 | dev->duplex = -1; | |
71 | dev->pause = dev->asym_pause = 0; | |
72 | dev->link = 1; | |
e8a2b6a4 | 73 | dev->interface = PHY_INTERFACE_MODE_GMII; |
11b0bacd VB |
74 | |
75 | dev->autoneg = AUTONEG_ENABLE; | |
76 | ||
77 | dev->addr = addr; | |
78 | dev->phy_id = phy_id; | |
79 | dev->bus = bus; | |
80 | ||
81 | dev->state = PHY_DOWN; | |
82 | ||
83 | spin_lock_init(&dev->lock); | |
84 | ||
85 | return dev; | |
86 | } | |
87 | EXPORT_SYMBOL(phy_device_create); | |
88 | ||
b3df0da8 RD |
89 | /** |
90 | * get_phy_device - reads the specified PHY device and returns its @phy_device struct | |
91 | * @bus: the target MII bus | |
92 | * @addr: PHY address on the MII bus | |
00db8189 | 93 | * |
b3df0da8 RD |
94 | * Description: Reads the ID registers of the PHY at @addr on the |
95 | * @bus, then allocates and returns the phy_device to represent it. | |
00db8189 AF |
96 | */ |
97 | struct phy_device * get_phy_device(struct mii_bus *bus, int addr) | |
98 | { | |
99 | int phy_reg; | |
100 | u32 phy_id; | |
101 | struct phy_device *dev = NULL; | |
102 | ||
103 | /* Grab the bits from PHYIR1, and put them | |
104 | * in the upper half */ | |
105 | phy_reg = bus->read(bus, addr, MII_PHYSID1); | |
106 | ||
107 | if (phy_reg < 0) | |
108 | return ERR_PTR(phy_reg); | |
109 | ||
110 | phy_id = (phy_reg & 0xffff) << 16; | |
111 | ||
112 | /* Grab the bits from PHYIR2, and put them in the lower half */ | |
113 | phy_reg = bus->read(bus, addr, MII_PHYSID2); | |
114 | ||
115 | if (phy_reg < 0) | |
116 | return ERR_PTR(phy_reg); | |
117 | ||
118 | phy_id |= (phy_reg & 0xffff); | |
119 | ||
120 | /* If the phy_id is all Fs, there is no device there */ | |
121 | if (0xffffffff == phy_id) | |
122 | return NULL; | |
123 | ||
11b0bacd | 124 | dev = phy_device_create(bus, addr, phy_id); |
00db8189 AF |
125 | |
126 | return dev; | |
127 | } | |
128 | ||
b3df0da8 RD |
129 | /** |
130 | * phy_prepare_link - prepares the PHY layer to monitor link status | |
131 | * @phydev: target phy_device struct | |
132 | * @handler: callback function for link status change notifications | |
00db8189 | 133 | * |
b3df0da8 | 134 | * Description: Tells the PHY infrastructure to handle the |
00db8189 AF |
135 | * gory details on monitoring link status (whether through |
136 | * polling or an interrupt), and to call back to the | |
137 | * connected device driver when the link status changes. | |
138 | * If you want to monitor your own link state, don't call | |
b3df0da8 RD |
139 | * this function. |
140 | */ | |
00db8189 AF |
141 | void phy_prepare_link(struct phy_device *phydev, |
142 | void (*handler)(struct net_device *)) | |
143 | { | |
144 | phydev->adjust_link = handler; | |
145 | } | |
146 | ||
b3df0da8 RD |
147 | /** |
148 | * phy_connect - connect an ethernet device to a PHY device | |
149 | * @dev: the network device to connect | |
150 | * @phy_id: the PHY device to connect | |
151 | * @handler: callback function for state change notifications | |
152 | * @flags: PHY device's dev_flags | |
153 | * @interface: PHY device's interface | |
e1393456 | 154 | * |
b3df0da8 | 155 | * Description: Convenience function for connecting ethernet |
e1393456 AF |
156 | * devices to PHY devices. The default behavior is for |
157 | * the PHY infrastructure to handle everything, and only notify | |
158 | * the connected driver when the link status changes. If you | |
159 | * don't want, or can't use the provided functionality, you may | |
160 | * choose to call only the subset of functions which provide | |
161 | * the desired functionality. | |
162 | */ | |
163 | struct phy_device * phy_connect(struct net_device *dev, const char *phy_id, | |
e8a2b6a4 | 164 | void (*handler)(struct net_device *), u32 flags, |
1a168934 | 165 | phy_interface_t interface) |
e1393456 AF |
166 | { |
167 | struct phy_device *phydev; | |
168 | ||
e8a2b6a4 | 169 | phydev = phy_attach(dev, phy_id, flags, interface); |
e1393456 AF |
170 | |
171 | if (IS_ERR(phydev)) | |
172 | return phydev; | |
173 | ||
174 | phy_prepare_link(phydev, handler); | |
175 | ||
176 | phy_start_machine(phydev, NULL); | |
177 | ||
178 | if (phydev->irq > 0) | |
179 | phy_start_interrupts(phydev); | |
180 | ||
181 | return phydev; | |
182 | } | |
183 | EXPORT_SYMBOL(phy_connect); | |
184 | ||
b3df0da8 RD |
185 | /** |
186 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY device | |
187 | * @phydev: target phy_device struct | |
188 | */ | |
e1393456 AF |
189 | void phy_disconnect(struct phy_device *phydev) |
190 | { | |
191 | if (phydev->irq > 0) | |
192 | phy_stop_interrupts(phydev); | |
193 | ||
194 | phy_stop_machine(phydev); | |
195 | ||
196 | phydev->adjust_link = NULL; | |
197 | ||
198 | phy_detach(phydev); | |
199 | } | |
200 | EXPORT_SYMBOL(phy_disconnect); | |
201 | ||
b3df0da8 RD |
202 | static int phy_compare_id(struct device *dev, void *data) |
203 | { | |
204 | return strcmp((char *)data, dev->bus_id) ? 0 : 1; | |
205 | } | |
206 | ||
207 | /** | |
208 | * phy_attach - attach a network device to a particular PHY device | |
209 | * @dev: network device to attach | |
210 | * @phy_id: PHY device to attach | |
211 | * @flags: PHY device's dev_flags | |
212 | * @interface: PHY device's interface | |
e1393456 | 213 | * |
b3df0da8 | 214 | * Description: Called by drivers to attach to a particular PHY |
e1393456 AF |
215 | * device. The phy_device is found, and properly hooked up |
216 | * to the phy_driver. If no driver is attached, then the | |
217 | * genphy_driver is used. The phy_device is given a ptr to | |
218 | * the attaching device, and given a callback for link status | |
b3df0da8 | 219 | * change. The phy_device is returned to the attaching driver. |
e1393456 | 220 | */ |
e1393456 | 221 | struct phy_device *phy_attach(struct net_device *dev, |
1a168934 | 222 | const char *phy_id, u32 flags, phy_interface_t interface) |
e1393456 AF |
223 | { |
224 | struct bus_type *bus = &mdio_bus_type; | |
225 | struct phy_device *phydev; | |
226 | struct device *d; | |
227 | ||
228 | /* Search the list of PHY devices on the mdio bus for the | |
229 | * PHY with the requested name */ | |
230 | d = bus_find_device(bus, NULL, (void *)phy_id, phy_compare_id); | |
231 | ||
232 | if (d) { | |
233 | phydev = to_phy_device(d); | |
234 | } else { | |
235 | printk(KERN_ERR "%s not found\n", phy_id); | |
236 | return ERR_PTR(-ENODEV); | |
237 | } | |
238 | ||
239 | /* Assume that if there is no driver, that it doesn't | |
240 | * exist, and we should use the genphy driver. */ | |
241 | if (NULL == d->driver) { | |
242 | int err; | |
e1393456 AF |
243 | d->driver = &genphy_driver.driver; |
244 | ||
245 | err = d->driver->probe(d); | |
b7a00ecd JG |
246 | if (err >= 0) |
247 | err = device_bind_driver(d); | |
e1393456 | 248 | |
b7a00ecd JG |
249 | if (err) |
250 | return ERR_PTR(err); | |
e1393456 AF |
251 | } |
252 | ||
253 | if (phydev->attached_dev) { | |
254 | printk(KERN_ERR "%s: %s already attached\n", | |
255 | dev->name, phy_id); | |
256 | return ERR_PTR(-EBUSY); | |
257 | } | |
258 | ||
259 | phydev->attached_dev = dev; | |
260 | ||
261 | phydev->dev_flags = flags; | |
262 | ||
e8a2b6a4 AF |
263 | phydev->interface = interface; |
264 | ||
265 | /* Do initial configuration here, now that | |
266 | * we have certain key parameters | |
267 | * (dev_flags and interface) */ | |
268 | if (phydev->drv->config_init) { | |
269 | int err; | |
270 | ||
271 | err = phydev->drv->config_init(phydev); | |
272 | ||
273 | if (err < 0) | |
274 | return ERR_PTR(err); | |
275 | } | |
276 | ||
e1393456 AF |
277 | return phydev; |
278 | } | |
279 | EXPORT_SYMBOL(phy_attach); | |
280 | ||
b3df0da8 RD |
281 | /** |
282 | * phy_detach - detach a PHY device from its network device | |
283 | * @phydev: target phy_device struct | |
284 | */ | |
e1393456 AF |
285 | void phy_detach(struct phy_device *phydev) |
286 | { | |
287 | phydev->attached_dev = NULL; | |
288 | ||
289 | /* If the device had no specific driver before (i.e. - it | |
290 | * was using the generic driver), we unbind the device | |
291 | * from the generic driver so that there's a chance a | |
292 | * real driver could be loaded */ | |
87aebe07 | 293 | if (phydev->dev.driver == &genphy_driver.driver) |
e1393456 | 294 | device_release_driver(&phydev->dev); |
e1393456 AF |
295 | } |
296 | EXPORT_SYMBOL(phy_detach); | |
297 | ||
298 | ||
00db8189 AF |
299 | /* Generic PHY support and helper functions */ |
300 | ||
b3df0da8 RD |
301 | /** |
302 | * genphy_config_advert - sanitize and advertise auto-negotation parameters | |
303 | * @phydev: target phy_device struct | |
00db8189 | 304 | * |
b3df0da8 | 305 | * Description: Writes MII_ADVERTISE with the appropriate values, |
00db8189 | 306 | * after sanitizing the values to make sure we only advertise |
b3df0da8 | 307 | * what is supported. |
00db8189 | 308 | */ |
e1393456 | 309 | int genphy_config_advert(struct phy_device *phydev) |
00db8189 AF |
310 | { |
311 | u32 advertise; | |
312 | int adv; | |
313 | int err; | |
314 | ||
315 | /* Only allow advertising what | |
316 | * this PHY supports */ | |
317 | phydev->advertising &= phydev->supported; | |
318 | advertise = phydev->advertising; | |
319 | ||
320 | /* Setup standard advertisement */ | |
321 | adv = phy_read(phydev, MII_ADVERTISE); | |
322 | ||
323 | if (adv < 0) | |
324 | return adv; | |
325 | ||
326 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | | |
327 | ADVERTISE_PAUSE_ASYM); | |
328 | if (advertise & ADVERTISED_10baseT_Half) | |
329 | adv |= ADVERTISE_10HALF; | |
330 | if (advertise & ADVERTISED_10baseT_Full) | |
331 | adv |= ADVERTISE_10FULL; | |
332 | if (advertise & ADVERTISED_100baseT_Half) | |
333 | adv |= ADVERTISE_100HALF; | |
334 | if (advertise & ADVERTISED_100baseT_Full) | |
335 | adv |= ADVERTISE_100FULL; | |
336 | if (advertise & ADVERTISED_Pause) | |
337 | adv |= ADVERTISE_PAUSE_CAP; | |
338 | if (advertise & ADVERTISED_Asym_Pause) | |
339 | adv |= ADVERTISE_PAUSE_ASYM; | |
340 | ||
341 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
342 | ||
343 | if (err < 0) | |
344 | return err; | |
345 | ||
346 | /* Configure gigabit if it's supported */ | |
347 | if (phydev->supported & (SUPPORTED_1000baseT_Half | | |
348 | SUPPORTED_1000baseT_Full)) { | |
349 | adv = phy_read(phydev, MII_CTRL1000); | |
350 | ||
351 | if (adv < 0) | |
352 | return adv; | |
353 | ||
354 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); | |
355 | if (advertise & SUPPORTED_1000baseT_Half) | |
356 | adv |= ADVERTISE_1000HALF; | |
357 | if (advertise & SUPPORTED_1000baseT_Full) | |
358 | adv |= ADVERTISE_1000FULL; | |
359 | err = phy_write(phydev, MII_CTRL1000, adv); | |
360 | ||
361 | if (err < 0) | |
362 | return err; | |
363 | } | |
364 | ||
365 | return adv; | |
366 | } | |
e1393456 | 367 | EXPORT_SYMBOL(genphy_config_advert); |
00db8189 | 368 | |
b3df0da8 RD |
369 | /** |
370 | * genphy_setup_forced - configures/forces speed/duplex from @phydev | |
371 | * @phydev: target phy_device struct | |
00db8189 | 372 | * |
b3df0da8 | 373 | * Description: Configures MII_BMCR to force speed/duplex |
00db8189 | 374 | * to the values in phydev. Assumes that the values are valid. |
b3df0da8 RD |
375 | * Please see phy_sanitize_settings(). |
376 | */ | |
00db8189 AF |
377 | int genphy_setup_forced(struct phy_device *phydev) |
378 | { | |
bc1e0a09 | 379 | int ctl = 0; |
00db8189 AF |
380 | |
381 | phydev->pause = phydev->asym_pause = 0; | |
382 | ||
383 | if (SPEED_1000 == phydev->speed) | |
384 | ctl |= BMCR_SPEED1000; | |
385 | else if (SPEED_100 == phydev->speed) | |
386 | ctl |= BMCR_SPEED100; | |
387 | ||
388 | if (DUPLEX_FULL == phydev->duplex) | |
389 | ctl |= BMCR_FULLDPLX; | |
390 | ||
391 | ctl = phy_write(phydev, MII_BMCR, ctl); | |
392 | ||
393 | if (ctl < 0) | |
394 | return ctl; | |
395 | ||
396 | /* We just reset the device, so we'd better configure any | |
397 | * settings the PHY requires to operate */ | |
398 | if (phydev->drv->config_init) | |
399 | ctl = phydev->drv->config_init(phydev); | |
400 | ||
401 | return ctl; | |
402 | } | |
403 | ||
404 | ||
b3df0da8 RD |
405 | /** |
406 | * genphy_restart_aneg - Enable and Restart Autonegotiation | |
407 | * @phydev: target phy_device struct | |
408 | */ | |
00db8189 AF |
409 | int genphy_restart_aneg(struct phy_device *phydev) |
410 | { | |
411 | int ctl; | |
412 | ||
413 | ctl = phy_read(phydev, MII_BMCR); | |
414 | ||
415 | if (ctl < 0) | |
416 | return ctl; | |
417 | ||
418 | ctl |= (BMCR_ANENABLE | BMCR_ANRESTART); | |
419 | ||
420 | /* Don't isolate the PHY if we're negotiating */ | |
421 | ctl &= ~(BMCR_ISOLATE); | |
422 | ||
423 | ctl = phy_write(phydev, MII_BMCR, ctl); | |
424 | ||
425 | return ctl; | |
426 | } | |
427 | ||
428 | ||
b3df0da8 RD |
429 | /** |
430 | * genphy_config_aneg - restart auto-negotiation or write BMCR | |
431 | * @phydev: target phy_device struct | |
00db8189 | 432 | * |
b3df0da8 | 433 | * Description: If auto-negotiation is enabled, we configure the |
00db8189 | 434 | * advertising, and then restart auto-negotiation. If it is not |
b3df0da8 | 435 | * enabled, then we write the BMCR. |
00db8189 AF |
436 | */ |
437 | int genphy_config_aneg(struct phy_device *phydev) | |
438 | { | |
439 | int err = 0; | |
440 | ||
441 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
442 | err = genphy_config_advert(phydev); | |
443 | ||
444 | if (err < 0) | |
445 | return err; | |
446 | ||
447 | err = genphy_restart_aneg(phydev); | |
448 | } else | |
449 | err = genphy_setup_forced(phydev); | |
450 | ||
451 | return err; | |
452 | } | |
453 | EXPORT_SYMBOL(genphy_config_aneg); | |
454 | ||
b3df0da8 RD |
455 | /** |
456 | * genphy_update_link - update link status in @phydev | |
457 | * @phydev: target phy_device struct | |
00db8189 | 458 | * |
b3df0da8 | 459 | * Description: Update the value in phydev->link to reflect the |
00db8189 | 460 | * current link value. In order to do this, we need to read |
b3df0da8 | 461 | * the status register twice, keeping the second value. |
00db8189 AF |
462 | */ |
463 | int genphy_update_link(struct phy_device *phydev) | |
464 | { | |
465 | int status; | |
466 | ||
467 | /* Do a fake read */ | |
468 | status = phy_read(phydev, MII_BMSR); | |
469 | ||
470 | if (status < 0) | |
471 | return status; | |
472 | ||
473 | /* Read link and autonegotiation status */ | |
474 | status = phy_read(phydev, MII_BMSR); | |
475 | ||
476 | if (status < 0) | |
477 | return status; | |
478 | ||
479 | if ((status & BMSR_LSTATUS) == 0) | |
480 | phydev->link = 0; | |
481 | else | |
482 | phydev->link = 1; | |
483 | ||
484 | return 0; | |
485 | } | |
6b655529 | 486 | EXPORT_SYMBOL(genphy_update_link); |
00db8189 | 487 | |
b3df0da8 RD |
488 | /** |
489 | * genphy_read_status - check the link status and update current link state | |
490 | * @phydev: target phy_device struct | |
00db8189 | 491 | * |
b3df0da8 | 492 | * Description: Check the link, then figure out the current state |
00db8189 AF |
493 | * by comparing what we advertise with what the link partner |
494 | * advertises. Start by checking the gigabit possibilities, | |
495 | * then move on to 10/100. | |
496 | */ | |
497 | int genphy_read_status(struct phy_device *phydev) | |
498 | { | |
499 | int adv; | |
500 | int err; | |
501 | int lpa; | |
502 | int lpagb = 0; | |
503 | ||
504 | /* Update the link, but return if there | |
505 | * was an error */ | |
506 | err = genphy_update_link(phydev); | |
507 | if (err) | |
508 | return err; | |
509 | ||
510 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
511 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
512 | | SUPPORTED_1000baseT_Full)) { | |
513 | lpagb = phy_read(phydev, MII_STAT1000); | |
514 | ||
515 | if (lpagb < 0) | |
516 | return lpagb; | |
517 | ||
518 | adv = phy_read(phydev, MII_CTRL1000); | |
519 | ||
520 | if (adv < 0) | |
521 | return adv; | |
522 | ||
523 | lpagb &= adv << 2; | |
524 | } | |
525 | ||
526 | lpa = phy_read(phydev, MII_LPA); | |
527 | ||
528 | if (lpa < 0) | |
529 | return lpa; | |
530 | ||
531 | adv = phy_read(phydev, MII_ADVERTISE); | |
532 | ||
533 | if (adv < 0) | |
534 | return adv; | |
535 | ||
536 | lpa &= adv; | |
537 | ||
538 | phydev->speed = SPEED_10; | |
539 | phydev->duplex = DUPLEX_HALF; | |
540 | phydev->pause = phydev->asym_pause = 0; | |
541 | ||
542 | if (lpagb & (LPA_1000FULL | LPA_1000HALF)) { | |
543 | phydev->speed = SPEED_1000; | |
544 | ||
545 | if (lpagb & LPA_1000FULL) | |
546 | phydev->duplex = DUPLEX_FULL; | |
547 | } else if (lpa & (LPA_100FULL | LPA_100HALF)) { | |
548 | phydev->speed = SPEED_100; | |
549 | ||
550 | if (lpa & LPA_100FULL) | |
551 | phydev->duplex = DUPLEX_FULL; | |
552 | } else | |
553 | if (lpa & LPA_10FULL) | |
554 | phydev->duplex = DUPLEX_FULL; | |
555 | ||
556 | if (phydev->duplex == DUPLEX_FULL){ | |
557 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; | |
558 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
559 | } | |
560 | } else { | |
561 | int bmcr = phy_read(phydev, MII_BMCR); | |
562 | if (bmcr < 0) | |
563 | return bmcr; | |
564 | ||
565 | if (bmcr & BMCR_FULLDPLX) | |
566 | phydev->duplex = DUPLEX_FULL; | |
567 | else | |
568 | phydev->duplex = DUPLEX_HALF; | |
569 | ||
570 | if (bmcr & BMCR_SPEED1000) | |
571 | phydev->speed = SPEED_1000; | |
572 | else if (bmcr & BMCR_SPEED100) | |
573 | phydev->speed = SPEED_100; | |
574 | else | |
575 | phydev->speed = SPEED_10; | |
576 | ||
577 | phydev->pause = phydev->asym_pause = 0; | |
578 | } | |
579 | ||
580 | return 0; | |
581 | } | |
582 | EXPORT_SYMBOL(genphy_read_status); | |
583 | ||
584 | static int genphy_config_init(struct phy_device *phydev) | |
585 | { | |
84c22d79 | 586 | int val; |
00db8189 AF |
587 | u32 features; |
588 | ||
589 | /* For now, I'll claim that the generic driver supports | |
590 | * all possible port types */ | |
591 | features = (SUPPORTED_TP | SUPPORTED_MII | |
592 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
593 | SUPPORTED_BNC); | |
594 | ||
595 | /* Do we support autonegotiation? */ | |
596 | val = phy_read(phydev, MII_BMSR); | |
597 | ||
598 | if (val < 0) | |
599 | return val; | |
600 | ||
601 | if (val & BMSR_ANEGCAPABLE) | |
602 | features |= SUPPORTED_Autoneg; | |
603 | ||
604 | if (val & BMSR_100FULL) | |
605 | features |= SUPPORTED_100baseT_Full; | |
606 | if (val & BMSR_100HALF) | |
607 | features |= SUPPORTED_100baseT_Half; | |
608 | if (val & BMSR_10FULL) | |
609 | features |= SUPPORTED_10baseT_Full; | |
610 | if (val & BMSR_10HALF) | |
611 | features |= SUPPORTED_10baseT_Half; | |
612 | ||
613 | if (val & BMSR_ESTATEN) { | |
614 | val = phy_read(phydev, MII_ESTATUS); | |
615 | ||
616 | if (val < 0) | |
617 | return val; | |
618 | ||
619 | if (val & ESTATUS_1000_TFULL) | |
620 | features |= SUPPORTED_1000baseT_Full; | |
621 | if (val & ESTATUS_1000_THALF) | |
622 | features |= SUPPORTED_1000baseT_Half; | |
623 | } | |
624 | ||
625 | phydev->supported = features; | |
626 | phydev->advertising = features; | |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
631 | ||
b3df0da8 RD |
632 | /** |
633 | * phy_probe - probe and init a PHY device | |
634 | * @dev: device to probe and init | |
00db8189 | 635 | * |
b3df0da8 | 636 | * Description: Take care of setting up the phy_device structure, |
00db8189 AF |
637 | * set the state to READY (the driver's init function should |
638 | * set it to STARTING if needed). | |
639 | */ | |
640 | static int phy_probe(struct device *dev) | |
641 | { | |
642 | struct phy_device *phydev; | |
643 | struct phy_driver *phydrv; | |
644 | struct device_driver *drv; | |
645 | int err = 0; | |
646 | ||
647 | phydev = to_phy_device(dev); | |
648 | ||
649 | /* Make sure the driver is held. | |
650 | * XXX -- Is this correct? */ | |
651 | drv = get_driver(phydev->dev.driver); | |
652 | phydrv = to_phy_driver(drv); | |
653 | phydev->drv = phydrv; | |
654 | ||
655 | /* Disable the interrupt if the PHY doesn't support it */ | |
656 | if (!(phydrv->flags & PHY_HAS_INTERRUPT)) | |
657 | phydev->irq = PHY_POLL; | |
658 | ||
026d7917 | 659 | spin_lock_bh(&phydev->lock); |
00db8189 AF |
660 | |
661 | /* Start out supporting everything. Eventually, | |
662 | * a controller will attach, and may modify one | |
663 | * or both of these values */ | |
664 | phydev->supported = phydrv->features; | |
665 | phydev->advertising = phydrv->features; | |
666 | ||
667 | /* Set the state to READY by default */ | |
668 | phydev->state = PHY_READY; | |
669 | ||
670 | if (phydev->drv->probe) | |
671 | err = phydev->drv->probe(phydev); | |
672 | ||
026d7917 | 673 | spin_unlock_bh(&phydev->lock); |
00db8189 | 674 | |
00db8189 | 675 | return err; |
e8a2b6a4 | 676 | |
00db8189 AF |
677 | } |
678 | ||
679 | static int phy_remove(struct device *dev) | |
680 | { | |
681 | struct phy_device *phydev; | |
682 | ||
683 | phydev = to_phy_device(dev); | |
684 | ||
9ff8c68b | 685 | spin_lock_bh(&phydev->lock); |
00db8189 | 686 | phydev->state = PHY_DOWN; |
9ff8c68b | 687 | spin_unlock_bh(&phydev->lock); |
00db8189 AF |
688 | |
689 | if (phydev->drv->remove) | |
690 | phydev->drv->remove(phydev); | |
691 | ||
692 | put_driver(dev->driver); | |
693 | phydev->drv = NULL; | |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
b3df0da8 RD |
698 | /** |
699 | * phy_driver_register - register a phy_driver with the PHY layer | |
700 | * @new_driver: new phy_driver to register | |
701 | */ | |
00db8189 AF |
702 | int phy_driver_register(struct phy_driver *new_driver) |
703 | { | |
704 | int retval; | |
705 | ||
706 | memset(&new_driver->driver, 0, sizeof(new_driver->driver)); | |
707 | new_driver->driver.name = new_driver->name; | |
708 | new_driver->driver.bus = &mdio_bus_type; | |
709 | new_driver->driver.probe = phy_probe; | |
710 | new_driver->driver.remove = phy_remove; | |
711 | ||
712 | retval = driver_register(&new_driver->driver); | |
713 | ||
714 | if (retval) { | |
715 | printk(KERN_ERR "%s: Error %d in registering driver\n", | |
716 | new_driver->name, retval); | |
717 | ||
718 | return retval; | |
719 | } | |
720 | ||
f2511f13 | 721 | pr_debug("%s: Registered new driver\n", new_driver->name); |
00db8189 AF |
722 | |
723 | return 0; | |
724 | } | |
725 | EXPORT_SYMBOL(phy_driver_register); | |
726 | ||
727 | void phy_driver_unregister(struct phy_driver *drv) | |
728 | { | |
729 | driver_unregister(&drv->driver); | |
730 | } | |
731 | EXPORT_SYMBOL(phy_driver_unregister); | |
732 | ||
e1393456 AF |
733 | static struct phy_driver genphy_driver = { |
734 | .phy_id = 0xffffffff, | |
735 | .phy_id_mask = 0xffffffff, | |
736 | .name = "Generic PHY", | |
737 | .config_init = genphy_config_init, | |
738 | .features = 0, | |
739 | .config_aneg = genphy_config_aneg, | |
740 | .read_status = genphy_read_status, | |
741 | .driver = {.owner= THIS_MODULE, }, | |
742 | }; | |
00db8189 | 743 | |
67c4f3fa | 744 | static int __init phy_init(void) |
00db8189 | 745 | { |
67c4f3fa | 746 | int rc; |
67c4f3fa JG |
747 | |
748 | rc = mdio_bus_init(); | |
749 | if (rc) | |
e1393456 | 750 | return rc; |
00db8189 | 751 | |
e1393456 AF |
752 | rc = phy_driver_register(&genphy_driver); |
753 | if (rc) | |
754 | mdio_bus_exit(); | |
67c4f3fa | 755 | |
67c4f3fa | 756 | return rc; |
00db8189 AF |
757 | } |
758 | ||
67c4f3fa | 759 | static void __exit phy_exit(void) |
00db8189 AF |
760 | { |
761 | phy_driver_unregister(&genphy_driver); | |
e1393456 | 762 | mdio_bus_exit(); |
00db8189 AF |
763 | } |
764 | ||
e1393456 | 765 | subsys_initcall(phy_init); |
67c4f3fa | 766 | module_exit(phy_exit); |