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