Commit | Line | Data |
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2f53e904 | 1 | /* Framework for finding and configuring PHYs. |
00db8189 AF |
2 | * Also contains generic PHY driver |
3 | * | |
4 | * Author: Andy Fleming | |
5 | * | |
6 | * Copyright (c) 2004 Freescale Semiconductor, Inc. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | */ | |
8d242488 JP |
14 | |
15 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
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> | |
2f53e904 SS |
33 | #include <linux/io.h> |
34 | #include <linux/uaccess.h> | |
00db8189 | 35 | |
00db8189 | 36 | #include <asm/irq.h> |
00db8189 | 37 | |
afcceaa3 OH |
38 | MODULE_DESCRIPTION("PHY library"); |
39 | MODULE_AUTHOR("Andy Fleming"); | |
40 | MODULE_LICENSE("GPL"); | |
41 | ||
6f4a7f41 AV |
42 | void phy_device_free(struct phy_device *phydev) |
43 | { | |
b2a43191 | 44 | put_device(&phydev->dev); |
6f4a7f41 | 45 | } |
4dea547f | 46 | EXPORT_SYMBOL(phy_device_free); |
6f4a7f41 AV |
47 | |
48 | static void phy_device_release(struct device *dev) | |
49 | { | |
b2a43191 | 50 | kfree(to_phy_device(dev)); |
6f4a7f41 AV |
51 | } |
52 | ||
4dea547f | 53 | static struct phy_driver genphy_driver; |
4dea547f | 54 | |
f62220d3 AF |
55 | static LIST_HEAD(phy_fixup_list); |
56 | static DEFINE_MUTEX(phy_fixup_lock); | |
57 | ||
89ff05ec | 58 | static int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
59 | u32 flags, phy_interface_t interface); | |
60 | ||
2f53e904 SS |
61 | /** |
62 | * phy_register_fixup - creates a new phy_fixup and adds it to the list | |
f62220d3 AF |
63 | * @bus_id: A string which matches phydev->dev.bus_id (or PHY_ANY_ID) |
64 | * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) | |
2f53e904 | 65 | * It can also be PHY_ANY_UID |
f62220d3 | 66 | * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before |
2f53e904 | 67 | * comparison |
f62220d3 AF |
68 | * @run: The actual code to be run when a matching PHY is found |
69 | */ | |
70 | int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, | |
2f53e904 | 71 | int (*run)(struct phy_device *)) |
f62220d3 | 72 | { |
553fe92b | 73 | struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); |
f62220d3 | 74 | |
f62220d3 AF |
75 | if (!fixup) |
76 | return -ENOMEM; | |
77 | ||
fb28ad35 | 78 | strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); |
f62220d3 AF |
79 | fixup->phy_uid = phy_uid; |
80 | fixup->phy_uid_mask = phy_uid_mask; | |
81 | fixup->run = run; | |
82 | ||
83 | mutex_lock(&phy_fixup_lock); | |
84 | list_add_tail(&fixup->list, &phy_fixup_list); | |
85 | mutex_unlock(&phy_fixup_lock); | |
86 | ||
87 | return 0; | |
88 | } | |
89 | EXPORT_SYMBOL(phy_register_fixup); | |
90 | ||
91 | /* Registers a fixup to be run on any PHY with the UID in phy_uid */ | |
92 | int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, | |
2f53e904 | 93 | int (*run)(struct phy_device *)) |
f62220d3 AF |
94 | { |
95 | return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); | |
96 | } | |
97 | EXPORT_SYMBOL(phy_register_fixup_for_uid); | |
98 | ||
99 | /* Registers a fixup to be run on the PHY with id string bus_id */ | |
100 | int phy_register_fixup_for_id(const char *bus_id, | |
2f53e904 | 101 | int (*run)(struct phy_device *)) |
f62220d3 AF |
102 | { |
103 | return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); | |
104 | } | |
105 | EXPORT_SYMBOL(phy_register_fixup_for_id); | |
106 | ||
2f53e904 | 107 | /* Returns 1 if fixup matches phydev in bus_id and phy_uid. |
f62220d3 AF |
108 | * Fixups can be set to match any in one or more fields. |
109 | */ | |
110 | static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) | |
111 | { | |
fb28ad35 | 112 | if (strcmp(fixup->bus_id, dev_name(&phydev->dev)) != 0) |
f62220d3 AF |
113 | if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) |
114 | return 0; | |
115 | ||
116 | if ((fixup->phy_uid & fixup->phy_uid_mask) != | |
2f53e904 | 117 | (phydev->phy_id & fixup->phy_uid_mask)) |
f62220d3 AF |
118 | if (fixup->phy_uid != PHY_ANY_UID) |
119 | return 0; | |
120 | ||
121 | return 1; | |
122 | } | |
123 | ||
124 | /* Runs any matching fixups for this phydev */ | |
125 | int phy_scan_fixups(struct phy_device *phydev) | |
126 | { | |
127 | struct phy_fixup *fixup; | |
128 | ||
129 | mutex_lock(&phy_fixup_lock); | |
130 | list_for_each_entry(fixup, &phy_fixup_list, list) { | |
131 | if (phy_needs_fixup(phydev, fixup)) { | |
553fe92b | 132 | int err = fixup->run(phydev); |
f62220d3 | 133 | |
bc23283c JS |
134 | if (err < 0) { |
135 | mutex_unlock(&phy_fixup_lock); | |
f62220d3 | 136 | return err; |
bc23283c | 137 | } |
f62220d3 AF |
138 | } |
139 | } | |
140 | mutex_unlock(&phy_fixup_lock); | |
141 | ||
142 | return 0; | |
143 | } | |
144 | EXPORT_SYMBOL(phy_scan_fixups); | |
145 | ||
ac28b9f8 | 146 | struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id, |
2f53e904 SS |
147 | bool is_c45, |
148 | struct phy_c45_device_ids *c45_ids) | |
11b0bacd VB |
149 | { |
150 | struct phy_device *dev; | |
8626d3b4 | 151 | |
2f53e904 | 152 | /* We allocate the device, and initialize the default values */ |
cd861280 | 153 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
11b0bacd | 154 | if (NULL == dev) |
e109374f | 155 | return (struct phy_device *)PTR_ERR((void *)-ENOMEM); |
11b0bacd | 156 | |
6f4a7f41 AV |
157 | dev->dev.release = phy_device_release; |
158 | ||
11b0bacd VB |
159 | dev->speed = 0; |
160 | dev->duplex = -1; | |
2f53e904 SS |
161 | dev->pause = 0; |
162 | dev->asym_pause = 0; | |
11b0bacd | 163 | dev->link = 1; |
e8a2b6a4 | 164 | dev->interface = PHY_INTERFACE_MODE_GMII; |
11b0bacd VB |
165 | |
166 | dev->autoneg = AUTONEG_ENABLE; | |
167 | ||
ac28b9f8 | 168 | dev->is_c45 = is_c45; |
11b0bacd VB |
169 | dev->addr = addr; |
170 | dev->phy_id = phy_id; | |
ac28b9f8 DD |
171 | if (c45_ids) |
172 | dev->c45_ids = *c45_ids; | |
11b0bacd | 173 | dev->bus = bus; |
4dea547f GL |
174 | dev->dev.parent = bus->parent; |
175 | dev->dev.bus = &mdio_bus_type; | |
176 | dev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL; | |
177 | dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr); | |
11b0bacd VB |
178 | |
179 | dev->state = PHY_DOWN; | |
180 | ||
35b5f6b1 | 181 | mutex_init(&dev->lock); |
4f9c85a1 | 182 | INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); |
5ea94e76 | 183 | INIT_WORK(&dev->phy_queue, phy_change); |
11b0bacd | 184 | |
8626d3b4 | 185 | /* Request the appropriate module unconditionally; don't |
2f53e904 SS |
186 | * bother trying to do so only if it isn't already loaded, |
187 | * because that gets complicated. A hotplug event would have | |
188 | * done an unconditional modprobe anyway. | |
189 | * We don't do normal hotplug because it won't work for MDIO | |
190 | * -- because it relies on the device staying around for long | |
191 | * enough for the driver to get loaded. With MDIO, the NIC | |
192 | * driver will get bored and give up as soon as it finds that | |
193 | * there's no driver _already_ loaded. | |
194 | */ | |
8626d3b4 DW |
195 | request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id)); |
196 | ||
b2a43191 PM |
197 | device_initialize(&dev->dev); |
198 | ||
11b0bacd VB |
199 | return dev; |
200 | } | |
ac28b9f8 DD |
201 | EXPORT_SYMBOL(phy_device_create); |
202 | ||
203 | /** | |
204 | * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. | |
205 | * @bus: the target MII bus | |
206 | * @addr: PHY address on the MII bus | |
207 | * @phy_id: where to store the ID retrieved. | |
208 | * @c45_ids: where to store the c45 ID information. | |
209 | * | |
210 | * If the PHY devices-in-package appears to be valid, it and the | |
211 | * corresponding identifiers are stored in @c45_ids, zero is stored | |
212 | * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns | |
213 | * zero on success. | |
214 | * | |
215 | */ | |
216 | static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id, | |
217 | struct phy_c45_device_ids *c45_ids) { | |
218 | int phy_reg; | |
219 | int i, reg_addr; | |
220 | const int num_ids = ARRAY_SIZE(c45_ids->device_ids); | |
221 | ||
222 | /* Find first non-zero Devices In package. Device | |
223 | * zero is reserved, so don't probe it. | |
224 | */ | |
225 | for (i = 1; | |
226 | i < num_ids && c45_ids->devices_in_package == 0; | |
227 | i++) { | |
228 | reg_addr = MII_ADDR_C45 | i << 16 | 6; | |
229 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
230 | if (phy_reg < 0) | |
231 | return -EIO; | |
232 | c45_ids->devices_in_package = (phy_reg & 0xffff) << 16; | |
233 | ||
234 | reg_addr = MII_ADDR_C45 | i << 16 | 5; | |
235 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
236 | if (phy_reg < 0) | |
237 | return -EIO; | |
238 | c45_ids->devices_in_package |= (phy_reg & 0xffff); | |
239 | ||
240 | /* If mostly Fs, there is no device there, | |
241 | * let's get out of here. | |
242 | */ | |
243 | if ((c45_ids->devices_in_package & 0x1fffffff) == 0x1fffffff) { | |
244 | *phy_id = 0xffffffff; | |
245 | return 0; | |
246 | } | |
247 | } | |
248 | ||
249 | /* Now probe Device Identifiers for each device present. */ | |
250 | for (i = 1; i < num_ids; i++) { | |
251 | if (!(c45_ids->devices_in_package & (1 << i))) | |
252 | continue; | |
253 | ||
254 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1; | |
255 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
256 | if (phy_reg < 0) | |
257 | return -EIO; | |
258 | c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16; | |
259 | ||
260 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2; | |
261 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
262 | if (phy_reg < 0) | |
263 | return -EIO; | |
264 | c45_ids->device_ids[i] |= (phy_reg & 0xffff); | |
265 | } | |
266 | *phy_id = 0; | |
267 | return 0; | |
268 | } | |
11b0bacd | 269 | |
b3df0da8 | 270 | /** |
cac1f3c8 | 271 | * get_phy_id - reads the specified addr for its ID. |
b3df0da8 RD |
272 | * @bus: the target MII bus |
273 | * @addr: PHY address on the MII bus | |
cac1f3c8 | 274 | * @phy_id: where to store the ID retrieved. |
ac28b9f8 DD |
275 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
276 | * @c45_ids: where to store the c45 ID information. | |
277 | * | |
278 | * Description: In the case of a 802.3-c22 PHY, reads the ID registers | |
279 | * of the PHY at @addr on the @bus, stores it in @phy_id and returns | |
280 | * zero on success. | |
281 | * | |
282 | * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and | |
283 | * its return value is in turn returned. | |
00db8189 | 284 | * |
00db8189 | 285 | */ |
ac28b9f8 DD |
286 | static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id, |
287 | bool is_c45, struct phy_c45_device_ids *c45_ids) | |
00db8189 AF |
288 | { |
289 | int phy_reg; | |
00db8189 | 290 | |
ac28b9f8 DD |
291 | if (is_c45) |
292 | return get_phy_c45_ids(bus, addr, phy_id, c45_ids); | |
293 | ||
2f53e904 | 294 | /* Grab the bits from PHYIR1, and put them in the upper half */ |
6fe32649 | 295 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); |
00db8189 | 296 | if (phy_reg < 0) |
cac1f3c8 | 297 | return -EIO; |
00db8189 | 298 | |
cac1f3c8 | 299 | *phy_id = (phy_reg & 0xffff) << 16; |
00db8189 AF |
300 | |
301 | /* Grab the bits from PHYIR2, and put them in the lower half */ | |
6fe32649 | 302 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); |
00db8189 | 303 | if (phy_reg < 0) |
cac1f3c8 PG |
304 | return -EIO; |
305 | ||
306 | *phy_id |= (phy_reg & 0xffff); | |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
311 | /** | |
2f53e904 SS |
312 | * get_phy_device - reads the specified PHY device and returns its @phy_device |
313 | * struct | |
cac1f3c8 PG |
314 | * @bus: the target MII bus |
315 | * @addr: PHY address on the MII bus | |
ac28b9f8 | 316 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
cac1f3c8 PG |
317 | * |
318 | * Description: Reads the ID registers of the PHY at @addr on the | |
319 | * @bus, then allocates and returns the phy_device to represent it. | |
320 | */ | |
ac28b9f8 | 321 | struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) |
cac1f3c8 | 322 | { |
ac28b9f8 | 323 | struct phy_c45_device_ids c45_ids = {0}; |
160c85f0 | 324 | u32 phy_id = 0; |
cac1f3c8 | 325 | int r; |
00db8189 | 326 | |
ac28b9f8 | 327 | r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids); |
cac1f3c8 PG |
328 | if (r) |
329 | return ERR_PTR(r); | |
00db8189 | 330 | |
6436cbcd GC |
331 | /* If the phy_id is mostly Fs, there is no device there */ |
332 | if ((phy_id & 0x1fffffff) == 0x1fffffff) | |
333 | return NULL; | |
334 | ||
e62a768f | 335 | return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); |
00db8189 | 336 | } |
4dea547f GL |
337 | EXPORT_SYMBOL(get_phy_device); |
338 | ||
339 | /** | |
340 | * phy_device_register - Register the phy device on the MDIO bus | |
1d4ac5d5 | 341 | * @phydev: phy_device structure to be added to the MDIO bus |
4dea547f GL |
342 | */ |
343 | int phy_device_register(struct phy_device *phydev) | |
344 | { | |
345 | int err; | |
346 | ||
2f53e904 | 347 | /* Don't register a phy if one is already registered at this address */ |
4dea547f GL |
348 | if (phydev->bus->phy_map[phydev->addr]) |
349 | return -EINVAL; | |
350 | phydev->bus->phy_map[phydev->addr] = phydev; | |
351 | ||
352 | /* Run all of the fixups for this PHY */ | |
87aa9f9c FF |
353 | err = phy_init_hw(phydev); |
354 | if (err) { | |
355 | pr_err("PHY %d failed to initialize\n", phydev->addr); | |
356 | goto out; | |
357 | } | |
4dea547f | 358 | |
b2a43191 | 359 | err = device_add(&phydev->dev); |
4dea547f | 360 | if (err) { |
b2a43191 | 361 | pr_err("PHY %d failed to add\n", phydev->addr); |
4dea547f GL |
362 | goto out; |
363 | } | |
364 | ||
365 | return 0; | |
366 | ||
367 | out: | |
368 | phydev->bus->phy_map[phydev->addr] = NULL; | |
369 | return err; | |
370 | } | |
371 | EXPORT_SYMBOL(phy_device_register); | |
00db8189 | 372 | |
f8f76db1 JP |
373 | /** |
374 | * phy_find_first - finds the first PHY device on the bus | |
375 | * @bus: the target MII bus | |
376 | */ | |
377 | struct phy_device *phy_find_first(struct mii_bus *bus) | |
378 | { | |
379 | int addr; | |
380 | ||
381 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { | |
382 | if (bus->phy_map[addr]) | |
383 | return bus->phy_map[addr]; | |
384 | } | |
385 | return NULL; | |
386 | } | |
387 | EXPORT_SYMBOL(phy_find_first); | |
388 | ||
b3df0da8 RD |
389 | /** |
390 | * phy_prepare_link - prepares the PHY layer to monitor link status | |
391 | * @phydev: target phy_device struct | |
392 | * @handler: callback function for link status change notifications | |
00db8189 | 393 | * |
b3df0da8 | 394 | * Description: Tells the PHY infrastructure to handle the |
00db8189 AF |
395 | * gory details on monitoring link status (whether through |
396 | * polling or an interrupt), and to call back to the | |
397 | * connected device driver when the link status changes. | |
398 | * If you want to monitor your own link state, don't call | |
b3df0da8 RD |
399 | * this function. |
400 | */ | |
89ff05ec | 401 | static void phy_prepare_link(struct phy_device *phydev, |
2f53e904 | 402 | void (*handler)(struct net_device *)) |
00db8189 AF |
403 | { |
404 | phydev->adjust_link = handler; | |
405 | } | |
406 | ||
fa94f6d9 GL |
407 | /** |
408 | * phy_connect_direct - connect an ethernet device to a specific phy_device | |
409 | * @dev: the network device to connect | |
410 | * @phydev: the pointer to the phy device | |
411 | * @handler: callback function for state change notifications | |
fa94f6d9 GL |
412 | * @interface: PHY device's interface |
413 | */ | |
414 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, | |
f9a8f83b | 415 | void (*handler)(struct net_device *), |
fa94f6d9 GL |
416 | phy_interface_t interface) |
417 | { | |
418 | int rc; | |
419 | ||
f9a8f83b | 420 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
fa94f6d9 GL |
421 | if (rc) |
422 | return rc; | |
423 | ||
424 | phy_prepare_link(phydev, handler); | |
29935aeb | 425 | phy_start_machine(phydev); |
fa94f6d9 GL |
426 | if (phydev->irq > 0) |
427 | phy_start_interrupts(phydev); | |
428 | ||
429 | return 0; | |
430 | } | |
431 | EXPORT_SYMBOL(phy_connect_direct); | |
432 | ||
b3df0da8 RD |
433 | /** |
434 | * phy_connect - connect an ethernet device to a PHY device | |
435 | * @dev: the network device to connect | |
5d12b132 | 436 | * @bus_id: the id string of the PHY device to connect |
b3df0da8 | 437 | * @handler: callback function for state change notifications |
b3df0da8 | 438 | * @interface: PHY device's interface |
e1393456 | 439 | * |
b3df0da8 | 440 | * Description: Convenience function for connecting ethernet |
e1393456 AF |
441 | * devices to PHY devices. The default behavior is for |
442 | * the PHY infrastructure to handle everything, and only notify | |
443 | * the connected driver when the link status changes. If you | |
444 | * don't want, or can't use the provided functionality, you may | |
445 | * choose to call only the subset of functions which provide | |
446 | * the desired functionality. | |
447 | */ | |
e109374f | 448 | struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, |
2f53e904 SS |
449 | void (*handler)(struct net_device *), |
450 | phy_interface_t interface) | |
e1393456 AF |
451 | { |
452 | struct phy_device *phydev; | |
fa94f6d9 GL |
453 | struct device *d; |
454 | int rc; | |
e1393456 | 455 | |
fa94f6d9 | 456 | /* Search the list of PHY devices on the mdio bus for the |
2f53e904 SS |
457 | * PHY with the requested name |
458 | */ | |
fa94f6d9 GL |
459 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); |
460 | if (!d) { | |
461 | pr_err("PHY %s not found\n", bus_id); | |
462 | return ERR_PTR(-ENODEV); | |
463 | } | |
464 | phydev = to_phy_device(d); | |
e1393456 | 465 | |
f9a8f83b | 466 | rc = phy_connect_direct(dev, phydev, handler, interface); |
fa94f6d9 GL |
467 | if (rc) |
468 | return ERR_PTR(rc); | |
e1393456 AF |
469 | |
470 | return phydev; | |
471 | } | |
472 | EXPORT_SYMBOL(phy_connect); | |
473 | ||
b3df0da8 | 474 | /** |
2f53e904 SS |
475 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY |
476 | * device | |
b3df0da8 RD |
477 | * @phydev: target phy_device struct |
478 | */ | |
e1393456 AF |
479 | void phy_disconnect(struct phy_device *phydev) |
480 | { | |
481 | if (phydev->irq > 0) | |
482 | phy_stop_interrupts(phydev); | |
483 | ||
484 | phy_stop_machine(phydev); | |
e109374f | 485 | |
e1393456 AF |
486 | phydev->adjust_link = NULL; |
487 | ||
488 | phy_detach(phydev); | |
489 | } | |
490 | EXPORT_SYMBOL(phy_disconnect); | |
491 | ||
87aa9f9c FF |
492 | /** |
493 | * phy_poll_reset - Safely wait until a PHY reset has properly completed | |
494 | * @phydev: The PHY device to poll | |
495 | * | |
496 | * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as | |
497 | * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR | |
498 | * register must be polled until the BMCR_RESET bit clears. | |
499 | * | |
500 | * Furthermore, any attempts to write to PHY registers may have no effect | |
501 | * or even generate MDIO bus errors until this is complete. | |
502 | * | |
503 | * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the | |
504 | * standard and do not fully reset after the BMCR_RESET bit is set, and may | |
505 | * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an | |
506 | * effort to support such broken PHYs, this function is separate from the | |
507 | * standard phy_init_hw() which will zero all the other bits in the BMCR | |
508 | * and reapply all driver-specific and board-specific fixups. | |
509 | */ | |
510 | static int phy_poll_reset(struct phy_device *phydev) | |
511 | { | |
512 | /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ | |
513 | unsigned int retries = 12; | |
514 | int ret; | |
515 | ||
516 | do { | |
517 | msleep(50); | |
518 | ret = phy_read(phydev, MII_BMCR); | |
519 | if (ret < 0) | |
520 | return ret; | |
521 | } while (ret & BMCR_RESET && --retries); | |
522 | if (ret & BMCR_RESET) | |
523 | return -ETIMEDOUT; | |
524 | ||
2f53e904 | 525 | /* Some chips (smsc911x) may still need up to another 1ms after the |
87aa9f9c FF |
526 | * BMCR_RESET bit is cleared before they are usable. |
527 | */ | |
528 | msleep(1); | |
529 | return 0; | |
530 | } | |
531 | ||
2f5cb434 AV |
532 | int phy_init_hw(struct phy_device *phydev) |
533 | { | |
534 | int ret; | |
535 | ||
536 | if (!phydev->drv || !phydev->drv->config_init) | |
537 | return 0; | |
538 | ||
87aa9f9c FF |
539 | ret = phy_write(phydev, MII_BMCR, BMCR_RESET); |
540 | if (ret < 0) | |
541 | return ret; | |
542 | ||
543 | ret = phy_poll_reset(phydev); | |
544 | if (ret < 0) | |
545 | return ret; | |
546 | ||
2f5cb434 AV |
547 | ret = phy_scan_fixups(phydev); |
548 | if (ret < 0) | |
549 | return ret; | |
550 | ||
551 | return phydev->drv->config_init(phydev); | |
552 | } | |
87aa9f9c | 553 | EXPORT_SYMBOL(phy_init_hw); |
2f5cb434 | 554 | |
b3df0da8 | 555 | /** |
fa94f6d9 | 556 | * phy_attach_direct - attach a network device to a given PHY device pointer |
b3df0da8 | 557 | * @dev: network device to attach |
fa94f6d9 | 558 | * @phydev: Pointer to phy_device to attach |
b3df0da8 RD |
559 | * @flags: PHY device's dev_flags |
560 | * @interface: PHY device's interface | |
e1393456 | 561 | * |
b3df0da8 | 562 | * Description: Called by drivers to attach to a particular PHY |
e1393456 AF |
563 | * device. The phy_device is found, and properly hooked up |
564 | * to the phy_driver. If no driver is attached, then the | |
565 | * genphy_driver is used. The phy_device is given a ptr to | |
566 | * the attaching device, and given a callback for link status | |
b3df0da8 | 567 | * change. The phy_device is returned to the attaching driver. |
e1393456 | 568 | */ |
89ff05ec | 569 | static int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
570 | u32 flags, phy_interface_t interface) | |
e1393456 | 571 | { |
fa94f6d9 | 572 | struct device *d = &phydev->dev; |
d005a09e | 573 | int err; |
e1393456 AF |
574 | |
575 | /* Assume that if there is no driver, that it doesn't | |
2f53e904 SS |
576 | * exist, and we should use the genphy driver. |
577 | */ | |
e1393456 | 578 | if (NULL == d->driver) { |
ac28b9f8 DD |
579 | if (phydev->is_c45) { |
580 | pr_err("No driver for phy %x\n", phydev->phy_id); | |
581 | return -ENODEV; | |
582 | } | |
583 | ||
e1393456 AF |
584 | d->driver = &genphy_driver.driver; |
585 | ||
586 | err = d->driver->probe(d); | |
b7a00ecd JG |
587 | if (err >= 0) |
588 | err = device_bind_driver(d); | |
e1393456 | 589 | |
b7a00ecd | 590 | if (err) |
fa94f6d9 | 591 | return err; |
e1393456 AF |
592 | } |
593 | ||
594 | if (phydev->attached_dev) { | |
fa94f6d9 GL |
595 | dev_err(&dev->dev, "PHY already attached\n"); |
596 | return -EBUSY; | |
e1393456 AF |
597 | } |
598 | ||
599 | phydev->attached_dev = dev; | |
c1f19b51 | 600 | dev->phydev = phydev; |
e1393456 AF |
601 | |
602 | phydev->dev_flags = flags; | |
603 | ||
e8a2b6a4 AF |
604 | phydev->interface = interface; |
605 | ||
ef24b16b AV |
606 | phydev->state = PHY_READY; |
607 | ||
e8a2b6a4 AF |
608 | /* Do initial configuration here, now that |
609 | * we have certain key parameters | |
2f53e904 SS |
610 | * (dev_flags and interface) |
611 | */ | |
d005a09e MKB |
612 | err = phy_init_hw(phydev); |
613 | if (err) | |
614 | phy_detach(phydev); | |
615 | ||
1211ce53 SH |
616 | phy_resume(phydev); |
617 | ||
d005a09e | 618 | return err; |
fa94f6d9 | 619 | } |
fa94f6d9 GL |
620 | |
621 | /** | |
622 | * phy_attach - attach a network device to a particular PHY device | |
623 | * @dev: network device to attach | |
624 | * @bus_id: Bus ID of PHY device to attach | |
fa94f6d9 GL |
625 | * @interface: PHY device's interface |
626 | * | |
627 | * Description: Same as phy_attach_direct() except that a PHY bus_id | |
628 | * string is passed instead of a pointer to a struct phy_device. | |
629 | */ | |
2f53e904 SS |
630 | struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, |
631 | phy_interface_t interface) | |
fa94f6d9 GL |
632 | { |
633 | struct bus_type *bus = &mdio_bus_type; | |
634 | struct phy_device *phydev; | |
635 | struct device *d; | |
636 | int rc; | |
637 | ||
638 | /* Search the list of PHY devices on the mdio bus for the | |
2f53e904 SS |
639 | * PHY with the requested name |
640 | */ | |
fa94f6d9 GL |
641 | d = bus_find_device_by_name(bus, NULL, bus_id); |
642 | if (!d) { | |
643 | pr_err("PHY %s not found\n", bus_id); | |
644 | return ERR_PTR(-ENODEV); | |
e8a2b6a4 | 645 | } |
fa94f6d9 GL |
646 | phydev = to_phy_device(d); |
647 | ||
f9a8f83b | 648 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
fa94f6d9 GL |
649 | if (rc) |
650 | return ERR_PTR(rc); | |
e8a2b6a4 | 651 | |
e1393456 AF |
652 | return phydev; |
653 | } | |
654 | EXPORT_SYMBOL(phy_attach); | |
655 | ||
b3df0da8 RD |
656 | /** |
657 | * phy_detach - detach a PHY device from its network device | |
658 | * @phydev: target phy_device struct | |
659 | */ | |
e1393456 AF |
660 | void phy_detach(struct phy_device *phydev) |
661 | { | |
c1f19b51 | 662 | phydev->attached_dev->phydev = NULL; |
e1393456 | 663 | phydev->attached_dev = NULL; |
1211ce53 | 664 | phy_suspend(phydev); |
e1393456 AF |
665 | |
666 | /* If the device had no specific driver before (i.e. - it | |
667 | * was using the generic driver), we unbind the device | |
668 | * from the generic driver so that there's a chance a | |
2f53e904 SS |
669 | * real driver could be loaded |
670 | */ | |
87aebe07 | 671 | if (phydev->dev.driver == &genphy_driver.driver) |
e1393456 | 672 | device_release_driver(&phydev->dev); |
e1393456 AF |
673 | } |
674 | EXPORT_SYMBOL(phy_detach); | |
675 | ||
481b5d93 SH |
676 | int phy_suspend(struct phy_device *phydev) |
677 | { | |
678 | struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver); | |
679 | struct ethtool_wolinfo wol; | |
680 | ||
681 | /* If the device has WOL enabled, we cannot suspend the PHY */ | |
682 | wol.cmd = ETHTOOL_GWOL; | |
683 | phy_ethtool_get_wol(phydev, &wol); | |
684 | if (wol.wolopts) | |
685 | return -EBUSY; | |
686 | ||
687 | if (phydrv->suspend) | |
688 | return phydrv->suspend(phydev); | |
689 | return 0; | |
690 | } | |
691 | ||
692 | int phy_resume(struct phy_device *phydev) | |
693 | { | |
694 | struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver); | |
695 | ||
696 | if (phydrv->resume) | |
697 | return phydrv->resume(phydev); | |
698 | return 0; | |
699 | } | |
e1393456 | 700 | |
00db8189 AF |
701 | /* Generic PHY support and helper functions */ |
702 | ||
b3df0da8 | 703 | /** |
25985edc | 704 | * genphy_config_advert - sanitize and advertise auto-negotiation parameters |
b3df0da8 | 705 | * @phydev: target phy_device struct |
00db8189 | 706 | * |
b3df0da8 | 707 | * Description: Writes MII_ADVERTISE with the appropriate values, |
00db8189 | 708 | * after sanitizing the values to make sure we only advertise |
51e2a384 TP |
709 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
710 | * hasn't changed, and > 0 if it has changed. | |
00db8189 | 711 | */ |
89ff05ec | 712 | static int genphy_config_advert(struct phy_device *phydev) |
00db8189 AF |
713 | { |
714 | u32 advertise; | |
51e2a384 TP |
715 | int oldadv, adv; |
716 | int err, changed = 0; | |
00db8189 | 717 | |
2f53e904 | 718 | /* Only allow advertising what this PHY supports */ |
00db8189 AF |
719 | phydev->advertising &= phydev->supported; |
720 | advertise = phydev->advertising; | |
721 | ||
722 | /* Setup standard advertisement */ | |
2f53e904 | 723 | adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
724 | if (adv < 0) |
725 | return adv; | |
726 | ||
2f53e904 | 727 | oldadv = adv; |
28011cf1 | 728 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | |
00db8189 | 729 | ADVERTISE_PAUSE_ASYM); |
37f07023 | 730 | adv |= ethtool_adv_to_mii_adv_t(advertise); |
00db8189 | 731 | |
51e2a384 TP |
732 | if (adv != oldadv) { |
733 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
00db8189 | 734 | |
51e2a384 TP |
735 | if (err < 0) |
736 | return err; | |
737 | changed = 1; | |
738 | } | |
00db8189 AF |
739 | |
740 | /* Configure gigabit if it's supported */ | |
741 | if (phydev->supported & (SUPPORTED_1000baseT_Half | | |
2f53e904 SS |
742 | SUPPORTED_1000baseT_Full)) { |
743 | adv = phy_read(phydev, MII_CTRL1000); | |
00db8189 AF |
744 | if (adv < 0) |
745 | return adv; | |
746 | ||
2f53e904 | 747 | oldadv = adv; |
00db8189 | 748 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); |
37f07023 | 749 | adv |= ethtool_adv_to_mii_ctrl1000_t(advertise); |
00db8189 | 750 | |
51e2a384 TP |
751 | if (adv != oldadv) { |
752 | err = phy_write(phydev, MII_CTRL1000, adv); | |
753 | ||
754 | if (err < 0) | |
755 | return err; | |
756 | changed = 1; | |
757 | } | |
00db8189 AF |
758 | } |
759 | ||
51e2a384 | 760 | return changed; |
00db8189 | 761 | } |
00db8189 | 762 | |
b3df0da8 RD |
763 | /** |
764 | * genphy_setup_forced - configures/forces speed/duplex from @phydev | |
765 | * @phydev: target phy_device struct | |
00db8189 | 766 | * |
b3df0da8 | 767 | * Description: Configures MII_BMCR to force speed/duplex |
00db8189 | 768 | * to the values in phydev. Assumes that the values are valid. |
b3df0da8 RD |
769 | * Please see phy_sanitize_settings(). |
770 | */ | |
3fb69bca | 771 | int genphy_setup_forced(struct phy_device *phydev) |
00db8189 | 772 | { |
bc1e0a09 | 773 | int ctl = 0; |
00db8189 | 774 | |
2f53e904 SS |
775 | phydev->pause = 0; |
776 | phydev->asym_pause = 0; | |
00db8189 AF |
777 | |
778 | if (SPEED_1000 == phydev->speed) | |
779 | ctl |= BMCR_SPEED1000; | |
780 | else if (SPEED_100 == phydev->speed) | |
781 | ctl |= BMCR_SPEED100; | |
782 | ||
783 | if (DUPLEX_FULL == phydev->duplex) | |
784 | ctl |= BMCR_FULLDPLX; | |
e109374f | 785 | |
e62a768f | 786 | return phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 787 | } |
3fb69bca | 788 | EXPORT_SYMBOL(genphy_setup_forced); |
00db8189 | 789 | |
b3df0da8 RD |
790 | /** |
791 | * genphy_restart_aneg - Enable and Restart Autonegotiation | |
792 | * @phydev: target phy_device struct | |
793 | */ | |
00db8189 AF |
794 | int genphy_restart_aneg(struct phy_device *phydev) |
795 | { | |
553fe92b | 796 | int ctl = phy_read(phydev, MII_BMCR); |
00db8189 AF |
797 | |
798 | if (ctl < 0) | |
799 | return ctl; | |
800 | ||
2f53e904 | 801 | ctl |= BMCR_ANENABLE | BMCR_ANRESTART; |
00db8189 AF |
802 | |
803 | /* Don't isolate the PHY if we're negotiating */ | |
2f53e904 | 804 | ctl &= ~BMCR_ISOLATE; |
00db8189 | 805 | |
553fe92b | 806 | return phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 807 | } |
892871dc | 808 | EXPORT_SYMBOL(genphy_restart_aneg); |
00db8189 | 809 | |
b3df0da8 RD |
810 | /** |
811 | * genphy_config_aneg - restart auto-negotiation or write BMCR | |
812 | * @phydev: target phy_device struct | |
00db8189 | 813 | * |
b3df0da8 | 814 | * Description: If auto-negotiation is enabled, we configure the |
00db8189 | 815 | * advertising, and then restart auto-negotiation. If it is not |
b3df0da8 | 816 | * enabled, then we write the BMCR. |
00db8189 AF |
817 | */ |
818 | int genphy_config_aneg(struct phy_device *phydev) | |
819 | { | |
de339c2a | 820 | int result; |
00db8189 | 821 | |
de339c2a TP |
822 | if (AUTONEG_ENABLE != phydev->autoneg) |
823 | return genphy_setup_forced(phydev); | |
00db8189 | 824 | |
de339c2a | 825 | result = genphy_config_advert(phydev); |
de339c2a TP |
826 | if (result < 0) /* error */ |
827 | return result; | |
de339c2a | 828 | if (result == 0) { |
25985edc | 829 | /* Advertisement hasn't changed, but maybe aneg was never on to |
2f53e904 SS |
830 | * begin with? Or maybe phy was isolated? |
831 | */ | |
de339c2a TP |
832 | int ctl = phy_read(phydev, MII_BMCR); |
833 | ||
834 | if (ctl < 0) | |
835 | return ctl; | |
836 | ||
837 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) | |
838 | result = 1; /* do restart aneg */ | |
839 | } | |
840 | ||
841 | /* Only restart aneg if we are advertising something different | |
2f53e904 SS |
842 | * than we were before. |
843 | */ | |
de339c2a TP |
844 | if (result > 0) |
845 | result = genphy_restart_aneg(phydev); | |
00db8189 | 846 | |
51e2a384 | 847 | return result; |
00db8189 AF |
848 | } |
849 | EXPORT_SYMBOL(genphy_config_aneg); | |
850 | ||
b3df0da8 RD |
851 | /** |
852 | * genphy_update_link - update link status in @phydev | |
853 | * @phydev: target phy_device struct | |
00db8189 | 854 | * |
b3df0da8 | 855 | * Description: Update the value in phydev->link to reflect the |
00db8189 | 856 | * current link value. In order to do this, we need to read |
b3df0da8 | 857 | * the status register twice, keeping the second value. |
00db8189 AF |
858 | */ |
859 | int genphy_update_link(struct phy_device *phydev) | |
860 | { | |
861 | int status; | |
862 | ||
863 | /* Do a fake read */ | |
864 | status = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
865 | if (status < 0) |
866 | return status; | |
867 | ||
868 | /* Read link and autonegotiation status */ | |
869 | status = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
870 | if (status < 0) |
871 | return status; | |
872 | ||
873 | if ((status & BMSR_LSTATUS) == 0) | |
874 | phydev->link = 0; | |
875 | else | |
876 | phydev->link = 1; | |
877 | ||
878 | return 0; | |
879 | } | |
6b655529 | 880 | EXPORT_SYMBOL(genphy_update_link); |
00db8189 | 881 | |
b3df0da8 RD |
882 | /** |
883 | * genphy_read_status - check the link status and update current link state | |
884 | * @phydev: target phy_device struct | |
00db8189 | 885 | * |
b3df0da8 | 886 | * Description: Check the link, then figure out the current state |
00db8189 AF |
887 | * by comparing what we advertise with what the link partner |
888 | * advertises. Start by checking the gigabit possibilities, | |
889 | * then move on to 10/100. | |
890 | */ | |
891 | int genphy_read_status(struct phy_device *phydev) | |
892 | { | |
893 | int adv; | |
894 | int err; | |
895 | int lpa; | |
896 | int lpagb = 0; | |
897 | ||
2f53e904 | 898 | /* Update the link, but return if there was an error */ |
00db8189 AF |
899 | err = genphy_update_link(phydev); |
900 | if (err) | |
901 | return err; | |
902 | ||
114002bc FF |
903 | phydev->lp_advertising = 0; |
904 | ||
00db8189 AF |
905 | if (AUTONEG_ENABLE == phydev->autoneg) { |
906 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
907 | | SUPPORTED_1000baseT_Full)) { | |
908 | lpagb = phy_read(phydev, MII_STAT1000); | |
00db8189 AF |
909 | if (lpagb < 0) |
910 | return lpagb; | |
911 | ||
912 | adv = phy_read(phydev, MII_CTRL1000); | |
00db8189 AF |
913 | if (adv < 0) |
914 | return adv; | |
915 | ||
114002bc FF |
916 | phydev->lp_advertising = |
917 | mii_stat1000_to_ethtool_lpa_t(lpagb); | |
00db8189 AF |
918 | lpagb &= adv << 2; |
919 | } | |
920 | ||
921 | lpa = phy_read(phydev, MII_LPA); | |
00db8189 AF |
922 | if (lpa < 0) |
923 | return lpa; | |
924 | ||
114002bc FF |
925 | phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa); |
926 | ||
00db8189 | 927 | adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
928 | if (adv < 0) |
929 | return adv; | |
930 | ||
931 | lpa &= adv; | |
932 | ||
933 | phydev->speed = SPEED_10; | |
934 | phydev->duplex = DUPLEX_HALF; | |
2f53e904 SS |
935 | phydev->pause = 0; |
936 | phydev->asym_pause = 0; | |
00db8189 AF |
937 | |
938 | if (lpagb & (LPA_1000FULL | LPA_1000HALF)) { | |
939 | phydev->speed = SPEED_1000; | |
940 | ||
941 | if (lpagb & LPA_1000FULL) | |
942 | phydev->duplex = DUPLEX_FULL; | |
943 | } else if (lpa & (LPA_100FULL | LPA_100HALF)) { | |
944 | phydev->speed = SPEED_100; | |
e109374f | 945 | |
00db8189 AF |
946 | if (lpa & LPA_100FULL) |
947 | phydev->duplex = DUPLEX_FULL; | |
948 | } else | |
949 | if (lpa & LPA_10FULL) | |
950 | phydev->duplex = DUPLEX_FULL; | |
951 | ||
e109374f | 952 | if (phydev->duplex == DUPLEX_FULL) { |
00db8189 AF |
953 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; |
954 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
955 | } | |
956 | } else { | |
957 | int bmcr = phy_read(phydev, MII_BMCR); | |
2f53e904 | 958 | |
00db8189 AF |
959 | if (bmcr < 0) |
960 | return bmcr; | |
961 | ||
962 | if (bmcr & BMCR_FULLDPLX) | |
963 | phydev->duplex = DUPLEX_FULL; | |
964 | else | |
965 | phydev->duplex = DUPLEX_HALF; | |
966 | ||
967 | if (bmcr & BMCR_SPEED1000) | |
968 | phydev->speed = SPEED_1000; | |
969 | else if (bmcr & BMCR_SPEED100) | |
970 | phydev->speed = SPEED_100; | |
971 | else | |
972 | phydev->speed = SPEED_10; | |
973 | ||
2f53e904 SS |
974 | phydev->pause = 0; |
975 | phydev->asym_pause = 0; | |
00db8189 AF |
976 | } |
977 | ||
978 | return 0; | |
979 | } | |
980 | EXPORT_SYMBOL(genphy_read_status); | |
981 | ||
982 | static int genphy_config_init(struct phy_device *phydev) | |
983 | { | |
84c22d79 | 984 | int val; |
00db8189 AF |
985 | u32 features; |
986 | ||
987 | /* For now, I'll claim that the generic driver supports | |
2f53e904 SS |
988 | * all possible port types |
989 | */ | |
00db8189 AF |
990 | features = (SUPPORTED_TP | SUPPORTED_MII |
991 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
992 | SUPPORTED_BNC); | |
993 | ||
994 | /* Do we support autonegotiation? */ | |
995 | val = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
996 | if (val < 0) |
997 | return val; | |
998 | ||
999 | if (val & BMSR_ANEGCAPABLE) | |
1000 | features |= SUPPORTED_Autoneg; | |
1001 | ||
1002 | if (val & BMSR_100FULL) | |
1003 | features |= SUPPORTED_100baseT_Full; | |
1004 | if (val & BMSR_100HALF) | |
1005 | features |= SUPPORTED_100baseT_Half; | |
1006 | if (val & BMSR_10FULL) | |
1007 | features |= SUPPORTED_10baseT_Full; | |
1008 | if (val & BMSR_10HALF) | |
1009 | features |= SUPPORTED_10baseT_Half; | |
1010 | ||
1011 | if (val & BMSR_ESTATEN) { | |
1012 | val = phy_read(phydev, MII_ESTATUS); | |
00db8189 AF |
1013 | if (val < 0) |
1014 | return val; | |
1015 | ||
1016 | if (val & ESTATUS_1000_TFULL) | |
1017 | features |= SUPPORTED_1000baseT_Full; | |
1018 | if (val & ESTATUS_1000_THALF) | |
1019 | features |= SUPPORTED_1000baseT_Half; | |
1020 | } | |
1021 | ||
1022 | phydev->supported = features; | |
1023 | phydev->advertising = features; | |
1024 | ||
1025 | return 0; | |
1026 | } | |
0f0ca340 GC |
1027 | int genphy_suspend(struct phy_device *phydev) |
1028 | { | |
1029 | int value; | |
1030 | ||
1031 | mutex_lock(&phydev->lock); | |
1032 | ||
1033 | value = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1034 | phy_write(phydev, MII_BMCR, value | BMCR_PDOWN); |
0f0ca340 GC |
1035 | |
1036 | mutex_unlock(&phydev->lock); | |
1037 | ||
1038 | return 0; | |
1039 | } | |
1040 | EXPORT_SYMBOL(genphy_suspend); | |
00db8189 | 1041 | |
0f0ca340 GC |
1042 | int genphy_resume(struct phy_device *phydev) |
1043 | { | |
1044 | int value; | |
1045 | ||
1046 | mutex_lock(&phydev->lock); | |
1047 | ||
1048 | value = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1049 | phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN); |
0f0ca340 GC |
1050 | |
1051 | mutex_unlock(&phydev->lock); | |
1052 | ||
1053 | return 0; | |
1054 | } | |
1055 | EXPORT_SYMBOL(genphy_resume); | |
00db8189 | 1056 | |
b3df0da8 RD |
1057 | /** |
1058 | * phy_probe - probe and init a PHY device | |
1059 | * @dev: device to probe and init | |
00db8189 | 1060 | * |
b3df0da8 | 1061 | * Description: Take care of setting up the phy_device structure, |
00db8189 AF |
1062 | * set the state to READY (the driver's init function should |
1063 | * set it to STARTING if needed). | |
1064 | */ | |
1065 | static int phy_probe(struct device *dev) | |
1066 | { | |
553fe92b SS |
1067 | struct phy_device *phydev = to_phy_device(dev); |
1068 | struct device_driver *drv = phydev->dev.driver; | |
1069 | struct phy_driver *phydrv = to_phy_driver(drv); | |
00db8189 AF |
1070 | int err = 0; |
1071 | ||
00db8189 AF |
1072 | phydev->drv = phydrv; |
1073 | ||
2c7b4921 FF |
1074 | /* Disable the interrupt if the PHY doesn't support it |
1075 | * but the interrupt is still a valid one | |
1076 | */ | |
1077 | if (!(phydrv->flags & PHY_HAS_INTERRUPT) && | |
2f53e904 | 1078 | phy_interrupt_is_valid(phydev)) |
00db8189 AF |
1079 | phydev->irq = PHY_POLL; |
1080 | ||
4284b6a5 FF |
1081 | if (phydrv->flags & PHY_IS_INTERNAL) |
1082 | phydev->is_internal = true; | |
1083 | ||
35b5f6b1 | 1084 | mutex_lock(&phydev->lock); |
00db8189 AF |
1085 | |
1086 | /* Start out supporting everything. Eventually, | |
1087 | * a controller will attach, and may modify one | |
2f53e904 SS |
1088 | * or both of these values |
1089 | */ | |
00db8189 AF |
1090 | phydev->supported = phydrv->features; |
1091 | phydev->advertising = phydrv->features; | |
1092 | ||
1093 | /* Set the state to READY by default */ | |
1094 | phydev->state = PHY_READY; | |
1095 | ||
1096 | if (phydev->drv->probe) | |
1097 | err = phydev->drv->probe(phydev); | |
1098 | ||
35b5f6b1 | 1099 | mutex_unlock(&phydev->lock); |
00db8189 | 1100 | |
00db8189 AF |
1101 | return err; |
1102 | } | |
1103 | ||
1104 | static int phy_remove(struct device *dev) | |
1105 | { | |
553fe92b | 1106 | struct phy_device *phydev = to_phy_device(dev); |
00db8189 | 1107 | |
35b5f6b1 | 1108 | mutex_lock(&phydev->lock); |
00db8189 | 1109 | phydev->state = PHY_DOWN; |
35b5f6b1 | 1110 | mutex_unlock(&phydev->lock); |
00db8189 AF |
1111 | |
1112 | if (phydev->drv->remove) | |
1113 | phydev->drv->remove(phydev); | |
00db8189 AF |
1114 | phydev->drv = NULL; |
1115 | ||
1116 | return 0; | |
1117 | } | |
1118 | ||
b3df0da8 RD |
1119 | /** |
1120 | * phy_driver_register - register a phy_driver with the PHY layer | |
1121 | * @new_driver: new phy_driver to register | |
1122 | */ | |
00db8189 AF |
1123 | int phy_driver_register(struct phy_driver *new_driver) |
1124 | { | |
1125 | int retval; | |
1126 | ||
00db8189 AF |
1127 | new_driver->driver.name = new_driver->name; |
1128 | new_driver->driver.bus = &mdio_bus_type; | |
1129 | new_driver->driver.probe = phy_probe; | |
1130 | new_driver->driver.remove = phy_remove; | |
1131 | ||
1132 | retval = driver_register(&new_driver->driver); | |
00db8189 | 1133 | if (retval) { |
8d242488 JP |
1134 | pr_err("%s: Error %d in registering driver\n", |
1135 | new_driver->name, retval); | |
00db8189 AF |
1136 | |
1137 | return retval; | |
1138 | } | |
1139 | ||
f2511f13 | 1140 | pr_debug("%s: Registered new driver\n", new_driver->name); |
00db8189 AF |
1141 | |
1142 | return 0; | |
1143 | } | |
1144 | EXPORT_SYMBOL(phy_driver_register); | |
1145 | ||
d5bf9071 CH |
1146 | int phy_drivers_register(struct phy_driver *new_driver, int n) |
1147 | { | |
1148 | int i, ret = 0; | |
1149 | ||
1150 | for (i = 0; i < n; i++) { | |
1151 | ret = phy_driver_register(new_driver + i); | |
1152 | if (ret) { | |
1153 | while (i-- > 0) | |
1154 | phy_driver_unregister(new_driver + i); | |
1155 | break; | |
1156 | } | |
1157 | } | |
1158 | return ret; | |
1159 | } | |
1160 | EXPORT_SYMBOL(phy_drivers_register); | |
1161 | ||
00db8189 AF |
1162 | void phy_driver_unregister(struct phy_driver *drv) |
1163 | { | |
1164 | driver_unregister(&drv->driver); | |
1165 | } | |
1166 | EXPORT_SYMBOL(phy_driver_unregister); | |
1167 | ||
d5bf9071 CH |
1168 | void phy_drivers_unregister(struct phy_driver *drv, int n) |
1169 | { | |
1170 | int i; | |
2f53e904 SS |
1171 | |
1172 | for (i = 0; i < n; i++) | |
d5bf9071 | 1173 | phy_driver_unregister(drv + i); |
d5bf9071 CH |
1174 | } |
1175 | EXPORT_SYMBOL(phy_drivers_unregister); | |
1176 | ||
e1393456 AF |
1177 | static struct phy_driver genphy_driver = { |
1178 | .phy_id = 0xffffffff, | |
1179 | .phy_id_mask = 0xffffffff, | |
1180 | .name = "Generic PHY", | |
1181 | .config_init = genphy_config_init, | |
1182 | .features = 0, | |
1183 | .config_aneg = genphy_config_aneg, | |
1184 | .read_status = genphy_read_status, | |
0f0ca340 GC |
1185 | .suspend = genphy_suspend, |
1186 | .resume = genphy_resume, | |
e109374f | 1187 | .driver = { .owner = THIS_MODULE, }, |
e1393456 | 1188 | }; |
00db8189 | 1189 | |
67c4f3fa | 1190 | static int __init phy_init(void) |
00db8189 | 1191 | { |
67c4f3fa | 1192 | int rc; |
67c4f3fa JG |
1193 | |
1194 | rc = mdio_bus_init(); | |
1195 | if (rc) | |
e1393456 | 1196 | return rc; |
00db8189 | 1197 | |
e1393456 AF |
1198 | rc = phy_driver_register(&genphy_driver); |
1199 | if (rc) | |
1200 | mdio_bus_exit(); | |
67c4f3fa | 1201 | |
67c4f3fa | 1202 | return rc; |
00db8189 AF |
1203 | } |
1204 | ||
67c4f3fa | 1205 | static void __exit phy_exit(void) |
00db8189 AF |
1206 | { |
1207 | phy_driver_unregister(&genphy_driver); | |
e1393456 | 1208 | mdio_bus_exit(); |
00db8189 AF |
1209 | } |
1210 | ||
e1393456 | 1211 | subsys_initcall(phy_init); |
67c4f3fa | 1212 | module_exit(phy_exit); |