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> | |
124059fd | 33 | #include <linux/mdio.h> |
2f53e904 SS |
34 | #include <linux/io.h> |
35 | #include <linux/uaccess.h> | |
de906af1 | 36 | #include <linux/of.h> |
00db8189 | 37 | |
00db8189 | 38 | #include <asm/irq.h> |
00db8189 | 39 | |
afcceaa3 OH |
40 | MODULE_DESCRIPTION("PHY library"); |
41 | MODULE_AUTHOR("Andy Fleming"); | |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
6f4a7f41 AV |
44 | void phy_device_free(struct phy_device *phydev) |
45 | { | |
b2a43191 | 46 | put_device(&phydev->dev); |
6f4a7f41 | 47 | } |
4dea547f | 48 | EXPORT_SYMBOL(phy_device_free); |
6f4a7f41 AV |
49 | |
50 | static void phy_device_release(struct device *dev) | |
51 | { | |
b2a43191 | 52 | kfree(to_phy_device(dev)); |
6f4a7f41 AV |
53 | } |
54 | ||
ab2145ed SX |
55 | enum genphy_driver { |
56 | GENPHY_DRV_1G, | |
124059fd | 57 | GENPHY_DRV_10G, |
ab2145ed SX |
58 | GENPHY_DRV_MAX |
59 | }; | |
60 | ||
61 | static struct phy_driver genphy_driver[GENPHY_DRV_MAX]; | |
4dea547f | 62 | |
f62220d3 AF |
63 | static LIST_HEAD(phy_fixup_list); |
64 | static DEFINE_MUTEX(phy_fixup_lock); | |
65 | ||
2f53e904 SS |
66 | /** |
67 | * phy_register_fixup - creates a new phy_fixup and adds it to the list | |
f62220d3 AF |
68 | * @bus_id: A string which matches phydev->dev.bus_id (or PHY_ANY_ID) |
69 | * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) | |
2f53e904 | 70 | * It can also be PHY_ANY_UID |
f62220d3 | 71 | * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before |
2f53e904 | 72 | * comparison |
f62220d3 AF |
73 | * @run: The actual code to be run when a matching PHY is found |
74 | */ | |
75 | int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, | |
2f53e904 | 76 | int (*run)(struct phy_device *)) |
f62220d3 | 77 | { |
553fe92b | 78 | struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); |
f62220d3 | 79 | |
f62220d3 AF |
80 | if (!fixup) |
81 | return -ENOMEM; | |
82 | ||
fb28ad35 | 83 | strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); |
f62220d3 AF |
84 | fixup->phy_uid = phy_uid; |
85 | fixup->phy_uid_mask = phy_uid_mask; | |
86 | fixup->run = run; | |
87 | ||
88 | mutex_lock(&phy_fixup_lock); | |
89 | list_add_tail(&fixup->list, &phy_fixup_list); | |
90 | mutex_unlock(&phy_fixup_lock); | |
91 | ||
92 | return 0; | |
93 | } | |
94 | EXPORT_SYMBOL(phy_register_fixup); | |
95 | ||
96 | /* Registers a fixup to be run on any PHY with the UID in phy_uid */ | |
97 | int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, | |
2f53e904 | 98 | int (*run)(struct phy_device *)) |
f62220d3 AF |
99 | { |
100 | return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); | |
101 | } | |
102 | EXPORT_SYMBOL(phy_register_fixup_for_uid); | |
103 | ||
104 | /* Registers a fixup to be run on the PHY with id string bus_id */ | |
105 | int phy_register_fixup_for_id(const char *bus_id, | |
2f53e904 | 106 | int (*run)(struct phy_device *)) |
f62220d3 AF |
107 | { |
108 | return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); | |
109 | } | |
110 | EXPORT_SYMBOL(phy_register_fixup_for_id); | |
111 | ||
2f53e904 | 112 | /* Returns 1 if fixup matches phydev in bus_id and phy_uid. |
f62220d3 AF |
113 | * Fixups can be set to match any in one or more fields. |
114 | */ | |
115 | static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) | |
116 | { | |
fb28ad35 | 117 | if (strcmp(fixup->bus_id, dev_name(&phydev->dev)) != 0) |
f62220d3 AF |
118 | if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) |
119 | return 0; | |
120 | ||
121 | if ((fixup->phy_uid & fixup->phy_uid_mask) != | |
2f53e904 | 122 | (phydev->phy_id & fixup->phy_uid_mask)) |
f62220d3 AF |
123 | if (fixup->phy_uid != PHY_ANY_UID) |
124 | return 0; | |
125 | ||
126 | return 1; | |
127 | } | |
128 | ||
129 | /* Runs any matching fixups for this phydev */ | |
fbfcec63 | 130 | static int phy_scan_fixups(struct phy_device *phydev) |
f62220d3 AF |
131 | { |
132 | struct phy_fixup *fixup; | |
133 | ||
134 | mutex_lock(&phy_fixup_lock); | |
135 | list_for_each_entry(fixup, &phy_fixup_list, list) { | |
136 | if (phy_needs_fixup(phydev, fixup)) { | |
553fe92b | 137 | int err = fixup->run(phydev); |
f62220d3 | 138 | |
bc23283c JS |
139 | if (err < 0) { |
140 | mutex_unlock(&phy_fixup_lock); | |
f62220d3 | 141 | return err; |
bc23283c | 142 | } |
b0ae009f | 143 | phydev->has_fixups = true; |
f62220d3 AF |
144 | } |
145 | } | |
146 | mutex_unlock(&phy_fixup_lock); | |
147 | ||
148 | return 0; | |
149 | } | |
f62220d3 | 150 | |
ac28b9f8 | 151 | struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id, |
2f53e904 SS |
152 | bool is_c45, |
153 | struct phy_c45_device_ids *c45_ids) | |
11b0bacd VB |
154 | { |
155 | struct phy_device *dev; | |
8626d3b4 | 156 | |
2f53e904 | 157 | /* We allocate the device, and initialize the default values */ |
cd861280 | 158 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
11b0bacd | 159 | if (NULL == dev) |
e109374f | 160 | return (struct phy_device *)PTR_ERR((void *)-ENOMEM); |
11b0bacd | 161 | |
6f4a7f41 AV |
162 | dev->dev.release = phy_device_release; |
163 | ||
11b0bacd VB |
164 | dev->speed = 0; |
165 | dev->duplex = -1; | |
2f53e904 SS |
166 | dev->pause = 0; |
167 | dev->asym_pause = 0; | |
11b0bacd | 168 | dev->link = 1; |
e8a2b6a4 | 169 | dev->interface = PHY_INTERFACE_MODE_GMII; |
11b0bacd VB |
170 | |
171 | dev->autoneg = AUTONEG_ENABLE; | |
172 | ||
ac28b9f8 | 173 | dev->is_c45 = is_c45; |
11b0bacd VB |
174 | dev->addr = addr; |
175 | dev->phy_id = phy_id; | |
ac28b9f8 DD |
176 | if (c45_ids) |
177 | dev->c45_ids = *c45_ids; | |
11b0bacd | 178 | dev->bus = bus; |
4dea547f GL |
179 | dev->dev.parent = bus->parent; |
180 | dev->dev.bus = &mdio_bus_type; | |
181 | dev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL; | |
182 | dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr); | |
11b0bacd VB |
183 | |
184 | dev->state = PHY_DOWN; | |
185 | ||
35b5f6b1 | 186 | mutex_init(&dev->lock); |
4f9c85a1 | 187 | INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); |
5ea94e76 | 188 | INIT_WORK(&dev->phy_queue, phy_change); |
11b0bacd | 189 | |
8626d3b4 | 190 | /* Request the appropriate module unconditionally; don't |
2f53e904 SS |
191 | * bother trying to do so only if it isn't already loaded, |
192 | * because that gets complicated. A hotplug event would have | |
193 | * done an unconditional modprobe anyway. | |
194 | * We don't do normal hotplug because it won't work for MDIO | |
195 | * -- because it relies on the device staying around for long | |
196 | * enough for the driver to get loaded. With MDIO, the NIC | |
197 | * driver will get bored and give up as soon as it finds that | |
198 | * there's no driver _already_ loaded. | |
199 | */ | |
8626d3b4 DW |
200 | request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id)); |
201 | ||
b2a43191 PM |
202 | device_initialize(&dev->dev); |
203 | ||
11b0bacd VB |
204 | return dev; |
205 | } | |
ac28b9f8 DD |
206 | EXPORT_SYMBOL(phy_device_create); |
207 | ||
208 | /** | |
209 | * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. | |
210 | * @bus: the target MII bus | |
211 | * @addr: PHY address on the MII bus | |
212 | * @phy_id: where to store the ID retrieved. | |
213 | * @c45_ids: where to store the c45 ID information. | |
214 | * | |
215 | * If the PHY devices-in-package appears to be valid, it and the | |
216 | * corresponding identifiers are stored in @c45_ids, zero is stored | |
217 | * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns | |
218 | * zero on success. | |
219 | * | |
220 | */ | |
221 | static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id, | |
222 | struct phy_c45_device_ids *c45_ids) { | |
223 | int phy_reg; | |
224 | int i, reg_addr; | |
225 | const int num_ids = ARRAY_SIZE(c45_ids->device_ids); | |
226 | ||
227 | /* Find first non-zero Devices In package. Device | |
228 | * zero is reserved, so don't probe it. | |
229 | */ | |
230 | for (i = 1; | |
231 | i < num_ids && c45_ids->devices_in_package == 0; | |
232 | i++) { | |
233 | reg_addr = MII_ADDR_C45 | i << 16 | 6; | |
234 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
235 | if (phy_reg < 0) | |
236 | return -EIO; | |
237 | c45_ids->devices_in_package = (phy_reg & 0xffff) << 16; | |
238 | ||
239 | reg_addr = MII_ADDR_C45 | i << 16 | 5; | |
240 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
241 | if (phy_reg < 0) | |
242 | return -EIO; | |
243 | c45_ids->devices_in_package |= (phy_reg & 0xffff); | |
244 | ||
245 | /* If mostly Fs, there is no device there, | |
246 | * let's get out of here. | |
247 | */ | |
248 | if ((c45_ids->devices_in_package & 0x1fffffff) == 0x1fffffff) { | |
249 | *phy_id = 0xffffffff; | |
250 | return 0; | |
251 | } | |
252 | } | |
253 | ||
254 | /* Now probe Device Identifiers for each device present. */ | |
255 | for (i = 1; i < num_ids; i++) { | |
256 | if (!(c45_ids->devices_in_package & (1 << i))) | |
257 | continue; | |
258 | ||
259 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1; | |
260 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
261 | if (phy_reg < 0) | |
262 | return -EIO; | |
263 | c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16; | |
264 | ||
265 | reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2; | |
266 | phy_reg = mdiobus_read(bus, addr, reg_addr); | |
267 | if (phy_reg < 0) | |
268 | return -EIO; | |
269 | c45_ids->device_ids[i] |= (phy_reg & 0xffff); | |
270 | } | |
271 | *phy_id = 0; | |
272 | return 0; | |
273 | } | |
11b0bacd | 274 | |
b3df0da8 | 275 | /** |
cac1f3c8 | 276 | * get_phy_id - reads the specified addr for its ID. |
b3df0da8 RD |
277 | * @bus: the target MII bus |
278 | * @addr: PHY address on the MII bus | |
cac1f3c8 | 279 | * @phy_id: where to store the ID retrieved. |
ac28b9f8 DD |
280 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
281 | * @c45_ids: where to store the c45 ID information. | |
282 | * | |
283 | * Description: In the case of a 802.3-c22 PHY, reads the ID registers | |
284 | * of the PHY at @addr on the @bus, stores it in @phy_id and returns | |
285 | * zero on success. | |
286 | * | |
287 | * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and | |
288 | * its return value is in turn returned. | |
00db8189 | 289 | * |
00db8189 | 290 | */ |
ac28b9f8 DD |
291 | static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id, |
292 | bool is_c45, struct phy_c45_device_ids *c45_ids) | |
00db8189 AF |
293 | { |
294 | int phy_reg; | |
00db8189 | 295 | |
ac28b9f8 DD |
296 | if (is_c45) |
297 | return get_phy_c45_ids(bus, addr, phy_id, c45_ids); | |
298 | ||
2f53e904 | 299 | /* Grab the bits from PHYIR1, and put them in the upper half */ |
6fe32649 | 300 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); |
00db8189 | 301 | if (phy_reg < 0) |
cac1f3c8 | 302 | return -EIO; |
00db8189 | 303 | |
cac1f3c8 | 304 | *phy_id = (phy_reg & 0xffff) << 16; |
00db8189 AF |
305 | |
306 | /* Grab the bits from PHYIR2, and put them in the lower half */ | |
6fe32649 | 307 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); |
00db8189 | 308 | if (phy_reg < 0) |
cac1f3c8 PG |
309 | return -EIO; |
310 | ||
311 | *phy_id |= (phy_reg & 0xffff); | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
316 | /** | |
2f53e904 SS |
317 | * get_phy_device - reads the specified PHY device and returns its @phy_device |
318 | * struct | |
cac1f3c8 PG |
319 | * @bus: the target MII bus |
320 | * @addr: PHY address on the MII bus | |
ac28b9f8 | 321 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
cac1f3c8 PG |
322 | * |
323 | * Description: Reads the ID registers of the PHY at @addr on the | |
324 | * @bus, then allocates and returns the phy_device to represent it. | |
325 | */ | |
ac28b9f8 | 326 | struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) |
cac1f3c8 | 327 | { |
ac28b9f8 | 328 | struct phy_c45_device_ids c45_ids = {0}; |
160c85f0 | 329 | u32 phy_id = 0; |
cac1f3c8 | 330 | int r; |
00db8189 | 331 | |
ac28b9f8 | 332 | r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids); |
cac1f3c8 PG |
333 | if (r) |
334 | return ERR_PTR(r); | |
00db8189 | 335 | |
6436cbcd GC |
336 | /* If the phy_id is mostly Fs, there is no device there */ |
337 | if ((phy_id & 0x1fffffff) == 0x1fffffff) | |
338 | return NULL; | |
339 | ||
e62a768f | 340 | return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); |
00db8189 | 341 | } |
4dea547f GL |
342 | EXPORT_SYMBOL(get_phy_device); |
343 | ||
344 | /** | |
345 | * phy_device_register - Register the phy device on the MDIO bus | |
1d4ac5d5 | 346 | * @phydev: phy_device structure to be added to the MDIO bus |
4dea547f GL |
347 | */ |
348 | int phy_device_register(struct phy_device *phydev) | |
349 | { | |
350 | int err; | |
351 | ||
2f53e904 | 352 | /* Don't register a phy if one is already registered at this address */ |
4dea547f GL |
353 | if (phydev->bus->phy_map[phydev->addr]) |
354 | return -EINVAL; | |
355 | phydev->bus->phy_map[phydev->addr] = phydev; | |
356 | ||
357 | /* Run all of the fixups for this PHY */ | |
87aa9f9c FF |
358 | err = phy_init_hw(phydev); |
359 | if (err) { | |
360 | pr_err("PHY %d failed to initialize\n", phydev->addr); | |
361 | goto out; | |
362 | } | |
4dea547f | 363 | |
b2a43191 | 364 | err = device_add(&phydev->dev); |
4dea547f | 365 | if (err) { |
b2a43191 | 366 | pr_err("PHY %d failed to add\n", phydev->addr); |
4dea547f GL |
367 | goto out; |
368 | } | |
369 | ||
370 | return 0; | |
371 | ||
372 | out: | |
373 | phydev->bus->phy_map[phydev->addr] = NULL; | |
374 | return err; | |
375 | } | |
376 | EXPORT_SYMBOL(phy_device_register); | |
00db8189 | 377 | |
f8f76db1 JP |
378 | /** |
379 | * phy_find_first - finds the first PHY device on the bus | |
380 | * @bus: the target MII bus | |
381 | */ | |
382 | struct phy_device *phy_find_first(struct mii_bus *bus) | |
383 | { | |
384 | int addr; | |
385 | ||
386 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { | |
387 | if (bus->phy_map[addr]) | |
388 | return bus->phy_map[addr]; | |
389 | } | |
390 | return NULL; | |
391 | } | |
392 | EXPORT_SYMBOL(phy_find_first); | |
393 | ||
b3df0da8 RD |
394 | /** |
395 | * phy_prepare_link - prepares the PHY layer to monitor link status | |
396 | * @phydev: target phy_device struct | |
397 | * @handler: callback function for link status change notifications | |
00db8189 | 398 | * |
b3df0da8 | 399 | * Description: Tells the PHY infrastructure to handle the |
00db8189 AF |
400 | * gory details on monitoring link status (whether through |
401 | * polling or an interrupt), and to call back to the | |
402 | * connected device driver when the link status changes. | |
403 | * If you want to monitor your own link state, don't call | |
b3df0da8 RD |
404 | * this function. |
405 | */ | |
89ff05ec | 406 | static void phy_prepare_link(struct phy_device *phydev, |
2f53e904 | 407 | void (*handler)(struct net_device *)) |
00db8189 AF |
408 | { |
409 | phydev->adjust_link = handler; | |
410 | } | |
411 | ||
fa94f6d9 GL |
412 | /** |
413 | * phy_connect_direct - connect an ethernet device to a specific phy_device | |
414 | * @dev: the network device to connect | |
415 | * @phydev: the pointer to the phy device | |
416 | * @handler: callback function for state change notifications | |
fa94f6d9 GL |
417 | * @interface: PHY device's interface |
418 | */ | |
419 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, | |
f9a8f83b | 420 | void (*handler)(struct net_device *), |
fa94f6d9 GL |
421 | phy_interface_t interface) |
422 | { | |
423 | int rc; | |
424 | ||
f9a8f83b | 425 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
fa94f6d9 GL |
426 | if (rc) |
427 | return rc; | |
428 | ||
429 | phy_prepare_link(phydev, handler); | |
29935aeb | 430 | phy_start_machine(phydev); |
fa94f6d9 GL |
431 | if (phydev->irq > 0) |
432 | phy_start_interrupts(phydev); | |
433 | ||
434 | return 0; | |
435 | } | |
436 | EXPORT_SYMBOL(phy_connect_direct); | |
437 | ||
b3df0da8 RD |
438 | /** |
439 | * phy_connect - connect an ethernet device to a PHY device | |
440 | * @dev: the network device to connect | |
5d12b132 | 441 | * @bus_id: the id string of the PHY device to connect |
b3df0da8 | 442 | * @handler: callback function for state change notifications |
b3df0da8 | 443 | * @interface: PHY device's interface |
e1393456 | 444 | * |
b3df0da8 | 445 | * Description: Convenience function for connecting ethernet |
e1393456 AF |
446 | * devices to PHY devices. The default behavior is for |
447 | * the PHY infrastructure to handle everything, and only notify | |
448 | * the connected driver when the link status changes. If you | |
449 | * don't want, or can't use the provided functionality, you may | |
450 | * choose to call only the subset of functions which provide | |
451 | * the desired functionality. | |
452 | */ | |
e109374f | 453 | struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, |
2f53e904 SS |
454 | void (*handler)(struct net_device *), |
455 | phy_interface_t interface) | |
e1393456 AF |
456 | { |
457 | struct phy_device *phydev; | |
fa94f6d9 GL |
458 | struct device *d; |
459 | int rc; | |
e1393456 | 460 | |
fa94f6d9 | 461 | /* Search the list of PHY devices on the mdio bus for the |
2f53e904 SS |
462 | * PHY with the requested name |
463 | */ | |
fa94f6d9 GL |
464 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); |
465 | if (!d) { | |
466 | pr_err("PHY %s not found\n", bus_id); | |
467 | return ERR_PTR(-ENODEV); | |
468 | } | |
469 | phydev = to_phy_device(d); | |
e1393456 | 470 | |
f9a8f83b | 471 | rc = phy_connect_direct(dev, phydev, handler, interface); |
fa94f6d9 GL |
472 | if (rc) |
473 | return ERR_PTR(rc); | |
e1393456 AF |
474 | |
475 | return phydev; | |
476 | } | |
477 | EXPORT_SYMBOL(phy_connect); | |
478 | ||
b3df0da8 | 479 | /** |
2f53e904 SS |
480 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY |
481 | * device | |
b3df0da8 RD |
482 | * @phydev: target phy_device struct |
483 | */ | |
e1393456 AF |
484 | void phy_disconnect(struct phy_device *phydev) |
485 | { | |
486 | if (phydev->irq > 0) | |
487 | phy_stop_interrupts(phydev); | |
488 | ||
489 | phy_stop_machine(phydev); | |
e109374f | 490 | |
e1393456 AF |
491 | phydev->adjust_link = NULL; |
492 | ||
493 | phy_detach(phydev); | |
494 | } | |
495 | EXPORT_SYMBOL(phy_disconnect); | |
496 | ||
87aa9f9c FF |
497 | /** |
498 | * phy_poll_reset - Safely wait until a PHY reset has properly completed | |
499 | * @phydev: The PHY device to poll | |
500 | * | |
501 | * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as | |
502 | * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR | |
503 | * register must be polled until the BMCR_RESET bit clears. | |
504 | * | |
505 | * Furthermore, any attempts to write to PHY registers may have no effect | |
506 | * or even generate MDIO bus errors until this is complete. | |
507 | * | |
508 | * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the | |
509 | * standard and do not fully reset after the BMCR_RESET bit is set, and may | |
510 | * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an | |
511 | * effort to support such broken PHYs, this function is separate from the | |
512 | * standard phy_init_hw() which will zero all the other bits in the BMCR | |
513 | * and reapply all driver-specific and board-specific fixups. | |
514 | */ | |
515 | static int phy_poll_reset(struct phy_device *phydev) | |
516 | { | |
517 | /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ | |
518 | unsigned int retries = 12; | |
519 | int ret; | |
520 | ||
521 | do { | |
522 | msleep(50); | |
523 | ret = phy_read(phydev, MII_BMCR); | |
524 | if (ret < 0) | |
525 | return ret; | |
526 | } while (ret & BMCR_RESET && --retries); | |
527 | if (ret & BMCR_RESET) | |
528 | return -ETIMEDOUT; | |
529 | ||
2f53e904 | 530 | /* Some chips (smsc911x) may still need up to another 1ms after the |
87aa9f9c FF |
531 | * BMCR_RESET bit is cleared before they are usable. |
532 | */ | |
533 | msleep(1); | |
534 | return 0; | |
535 | } | |
536 | ||
2f5cb434 AV |
537 | int phy_init_hw(struct phy_device *phydev) |
538 | { | |
9df81dd7 | 539 | int ret = 0; |
2f5cb434 AV |
540 | |
541 | if (!phydev->drv || !phydev->drv->config_init) | |
542 | return 0; | |
543 | ||
9df81dd7 FF |
544 | if (phydev->drv->soft_reset) |
545 | ret = phydev->drv->soft_reset(phydev); | |
546 | else | |
547 | ret = genphy_soft_reset(phydev); | |
548 | ||
87aa9f9c FF |
549 | if (ret < 0) |
550 | return ret; | |
551 | ||
2f5cb434 AV |
552 | ret = phy_scan_fixups(phydev); |
553 | if (ret < 0) | |
554 | return ret; | |
555 | ||
556 | return phydev->drv->config_init(phydev); | |
557 | } | |
87aa9f9c | 558 | EXPORT_SYMBOL(phy_init_hw); |
2f5cb434 | 559 | |
b3df0da8 | 560 | /** |
fa94f6d9 | 561 | * phy_attach_direct - attach a network device to a given PHY device pointer |
b3df0da8 | 562 | * @dev: network device to attach |
fa94f6d9 | 563 | * @phydev: Pointer to phy_device to attach |
b3df0da8 RD |
564 | * @flags: PHY device's dev_flags |
565 | * @interface: PHY device's interface | |
e1393456 | 566 | * |
b3df0da8 | 567 | * Description: Called by drivers to attach to a particular PHY |
e1393456 | 568 | * device. The phy_device is found, and properly hooked up |
257184d7 AF |
569 | * to the phy_driver. If no driver is attached, then a |
570 | * generic driver is used. The phy_device is given a ptr to | |
e1393456 | 571 | * the attaching device, and given a callback for link status |
b3df0da8 | 572 | * change. The phy_device is returned to the attaching driver. |
e1393456 | 573 | */ |
257184d7 AF |
574 | int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
575 | u32 flags, phy_interface_t interface) | |
e1393456 | 576 | { |
fa94f6d9 | 577 | struct device *d = &phydev->dev; |
d005a09e | 578 | int err; |
e1393456 AF |
579 | |
580 | /* Assume that if there is no driver, that it doesn't | |
2f53e904 SS |
581 | * exist, and we should use the genphy driver. |
582 | */ | |
e1393456 | 583 | if (NULL == d->driver) { |
257184d7 AF |
584 | if (phydev->is_c45) |
585 | d->driver = &genphy_driver[GENPHY_DRV_10G].driver; | |
586 | else | |
587 | d->driver = &genphy_driver[GENPHY_DRV_1G].driver; | |
e1393456 AF |
588 | |
589 | err = d->driver->probe(d); | |
b7a00ecd JG |
590 | if (err >= 0) |
591 | err = device_bind_driver(d); | |
e1393456 | 592 | |
b7a00ecd | 593 | if (err) |
fa94f6d9 | 594 | return err; |
e1393456 AF |
595 | } |
596 | ||
597 | if (phydev->attached_dev) { | |
fa94f6d9 GL |
598 | dev_err(&dev->dev, "PHY already attached\n"); |
599 | return -EBUSY; | |
e1393456 AF |
600 | } |
601 | ||
602 | phydev->attached_dev = dev; | |
c1f19b51 | 603 | dev->phydev = phydev; |
e1393456 AF |
604 | |
605 | phydev->dev_flags = flags; | |
606 | ||
e8a2b6a4 AF |
607 | phydev->interface = interface; |
608 | ||
ef24b16b AV |
609 | phydev->state = PHY_READY; |
610 | ||
e8a2b6a4 AF |
611 | /* Do initial configuration here, now that |
612 | * we have certain key parameters | |
2f53e904 SS |
613 | * (dev_flags and interface) |
614 | */ | |
d005a09e MKB |
615 | err = phy_init_hw(phydev); |
616 | if (err) | |
617 | phy_detach(phydev); | |
b394745d GR |
618 | else |
619 | phy_resume(phydev); | |
1211ce53 | 620 | |
d005a09e | 621 | return err; |
fa94f6d9 | 622 | } |
257184d7 | 623 | EXPORT_SYMBOL(phy_attach_direct); |
fa94f6d9 GL |
624 | |
625 | /** | |
626 | * phy_attach - attach a network device to a particular PHY device | |
627 | * @dev: network device to attach | |
628 | * @bus_id: Bus ID of PHY device to attach | |
fa94f6d9 GL |
629 | * @interface: PHY device's interface |
630 | * | |
631 | * Description: Same as phy_attach_direct() except that a PHY bus_id | |
632 | * string is passed instead of a pointer to a struct phy_device. | |
633 | */ | |
2f53e904 SS |
634 | struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, |
635 | phy_interface_t interface) | |
fa94f6d9 GL |
636 | { |
637 | struct bus_type *bus = &mdio_bus_type; | |
638 | struct phy_device *phydev; | |
639 | struct device *d; | |
640 | int rc; | |
641 | ||
642 | /* Search the list of PHY devices on the mdio bus for the | |
2f53e904 SS |
643 | * PHY with the requested name |
644 | */ | |
fa94f6d9 GL |
645 | d = bus_find_device_by_name(bus, NULL, bus_id); |
646 | if (!d) { | |
647 | pr_err("PHY %s not found\n", bus_id); | |
648 | return ERR_PTR(-ENODEV); | |
e8a2b6a4 | 649 | } |
fa94f6d9 GL |
650 | phydev = to_phy_device(d); |
651 | ||
f9a8f83b | 652 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
fa94f6d9 GL |
653 | if (rc) |
654 | return ERR_PTR(rc); | |
e8a2b6a4 | 655 | |
e1393456 AF |
656 | return phydev; |
657 | } | |
658 | EXPORT_SYMBOL(phy_attach); | |
659 | ||
b3df0da8 RD |
660 | /** |
661 | * phy_detach - detach a PHY device from its network device | |
662 | * @phydev: target phy_device struct | |
663 | */ | |
e1393456 AF |
664 | void phy_detach(struct phy_device *phydev) |
665 | { | |
ab2145ed | 666 | int i; |
c1f19b51 | 667 | phydev->attached_dev->phydev = NULL; |
e1393456 | 668 | phydev->attached_dev = NULL; |
1211ce53 | 669 | phy_suspend(phydev); |
e1393456 AF |
670 | |
671 | /* If the device had no specific driver before (i.e. - it | |
672 | * was using the generic driver), we unbind the device | |
673 | * from the generic driver so that there's a chance a | |
2f53e904 SS |
674 | * real driver could be loaded |
675 | */ | |
ab2145ed SX |
676 | for (i = 0; i < ARRAY_SIZE(genphy_driver); i++) { |
677 | if (phydev->dev.driver == &genphy_driver[i].driver) { | |
678 | device_release_driver(&phydev->dev); | |
679 | break; | |
680 | } | |
681 | } | |
e1393456 AF |
682 | } |
683 | EXPORT_SYMBOL(phy_detach); | |
684 | ||
481b5d93 SH |
685 | int phy_suspend(struct phy_device *phydev) |
686 | { | |
687 | struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver); | |
32fc3fd4 | 688 | struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; |
481b5d93 SH |
689 | |
690 | /* If the device has WOL enabled, we cannot suspend the PHY */ | |
481b5d93 SH |
691 | phy_ethtool_get_wol(phydev, &wol); |
692 | if (wol.wolopts) | |
693 | return -EBUSY; | |
694 | ||
695 | if (phydrv->suspend) | |
696 | return phydrv->suspend(phydev); | |
697 | return 0; | |
698 | } | |
699 | ||
700 | int phy_resume(struct phy_device *phydev) | |
701 | { | |
702 | struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver); | |
703 | ||
704 | if (phydrv->resume) | |
705 | return phydrv->resume(phydev); | |
706 | return 0; | |
707 | } | |
e1393456 | 708 | |
00db8189 AF |
709 | /* Generic PHY support and helper functions */ |
710 | ||
b3df0da8 | 711 | /** |
25985edc | 712 | * genphy_config_advert - sanitize and advertise auto-negotiation parameters |
b3df0da8 | 713 | * @phydev: target phy_device struct |
00db8189 | 714 | * |
b3df0da8 | 715 | * Description: Writes MII_ADVERTISE with the appropriate values, |
00db8189 | 716 | * after sanitizing the values to make sure we only advertise |
51e2a384 TP |
717 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
718 | * hasn't changed, and > 0 if it has changed. | |
00db8189 | 719 | */ |
89ff05ec | 720 | static int genphy_config_advert(struct phy_device *phydev) |
00db8189 AF |
721 | { |
722 | u32 advertise; | |
5273e3a5 | 723 | int oldadv, adv, bmsr; |
51e2a384 | 724 | int err, changed = 0; |
00db8189 | 725 | |
2f53e904 | 726 | /* Only allow advertising what this PHY supports */ |
00db8189 AF |
727 | phydev->advertising &= phydev->supported; |
728 | advertise = phydev->advertising; | |
729 | ||
730 | /* Setup standard advertisement */ | |
2f53e904 | 731 | adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
732 | if (adv < 0) |
733 | return adv; | |
734 | ||
2f53e904 | 735 | oldadv = adv; |
28011cf1 | 736 | adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | |
00db8189 | 737 | ADVERTISE_PAUSE_ASYM); |
37f07023 | 738 | adv |= ethtool_adv_to_mii_adv_t(advertise); |
00db8189 | 739 | |
51e2a384 TP |
740 | if (adv != oldadv) { |
741 | err = phy_write(phydev, MII_ADVERTISE, adv); | |
00db8189 | 742 | |
51e2a384 TP |
743 | if (err < 0) |
744 | return err; | |
745 | changed = 1; | |
746 | } | |
00db8189 | 747 | |
5273e3a5 FF |
748 | bmsr = phy_read(phydev, MII_BMSR); |
749 | if (bmsr < 0) | |
750 | return bmsr; | |
751 | ||
752 | /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all | |
753 | * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a | |
754 | * logical 1. | |
755 | */ | |
756 | if (!(bmsr & BMSR_ESTATEN)) | |
757 | return changed; | |
758 | ||
00db8189 | 759 | /* Configure gigabit if it's supported */ |
5273e3a5 FF |
760 | adv = phy_read(phydev, MII_CTRL1000); |
761 | if (adv < 0) | |
762 | return adv; | |
763 | ||
764 | oldadv = adv; | |
765 | adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); | |
766 | ||
00db8189 | 767 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
2f53e904 | 768 | SUPPORTED_1000baseT_Full)) { |
37f07023 | 769 | adv |= ethtool_adv_to_mii_ctrl1000_t(advertise); |
5273e3a5 | 770 | if (adv != oldadv) |
51e2a384 | 771 | changed = 1; |
00db8189 AF |
772 | } |
773 | ||
5273e3a5 FF |
774 | err = phy_write(phydev, MII_CTRL1000, adv); |
775 | if (err < 0) | |
776 | return err; | |
777 | ||
51e2a384 | 778 | return changed; |
00db8189 | 779 | } |
00db8189 | 780 | |
b3df0da8 RD |
781 | /** |
782 | * genphy_setup_forced - configures/forces speed/duplex from @phydev | |
783 | * @phydev: target phy_device struct | |
00db8189 | 784 | * |
b3df0da8 | 785 | * Description: Configures MII_BMCR to force speed/duplex |
00db8189 | 786 | * to the values in phydev. Assumes that the values are valid. |
b3df0da8 RD |
787 | * Please see phy_sanitize_settings(). |
788 | */ | |
3fb69bca | 789 | int genphy_setup_forced(struct phy_device *phydev) |
00db8189 | 790 | { |
bc1e0a09 | 791 | int ctl = 0; |
00db8189 | 792 | |
2f53e904 SS |
793 | phydev->pause = 0; |
794 | phydev->asym_pause = 0; | |
00db8189 AF |
795 | |
796 | if (SPEED_1000 == phydev->speed) | |
797 | ctl |= BMCR_SPEED1000; | |
798 | else if (SPEED_100 == phydev->speed) | |
799 | ctl |= BMCR_SPEED100; | |
800 | ||
801 | if (DUPLEX_FULL == phydev->duplex) | |
802 | ctl |= BMCR_FULLDPLX; | |
e109374f | 803 | |
e62a768f | 804 | return phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 805 | } |
3fb69bca | 806 | EXPORT_SYMBOL(genphy_setup_forced); |
00db8189 | 807 | |
b3df0da8 RD |
808 | /** |
809 | * genphy_restart_aneg - Enable and Restart Autonegotiation | |
810 | * @phydev: target phy_device struct | |
811 | */ | |
00db8189 AF |
812 | int genphy_restart_aneg(struct phy_device *phydev) |
813 | { | |
553fe92b | 814 | int ctl = phy_read(phydev, MII_BMCR); |
00db8189 AF |
815 | |
816 | if (ctl < 0) | |
817 | return ctl; | |
818 | ||
2f53e904 | 819 | ctl |= BMCR_ANENABLE | BMCR_ANRESTART; |
00db8189 AF |
820 | |
821 | /* Don't isolate the PHY if we're negotiating */ | |
2f53e904 | 822 | ctl &= ~BMCR_ISOLATE; |
00db8189 | 823 | |
553fe92b | 824 | return phy_write(phydev, MII_BMCR, ctl); |
00db8189 | 825 | } |
892871dc | 826 | EXPORT_SYMBOL(genphy_restart_aneg); |
00db8189 | 827 | |
b3df0da8 RD |
828 | /** |
829 | * genphy_config_aneg - restart auto-negotiation or write BMCR | |
830 | * @phydev: target phy_device struct | |
00db8189 | 831 | * |
b3df0da8 | 832 | * Description: If auto-negotiation is enabled, we configure the |
00db8189 | 833 | * advertising, and then restart auto-negotiation. If it is not |
b3df0da8 | 834 | * enabled, then we write the BMCR. |
00db8189 AF |
835 | */ |
836 | int genphy_config_aneg(struct phy_device *phydev) | |
837 | { | |
de339c2a | 838 | int result; |
00db8189 | 839 | |
de339c2a TP |
840 | if (AUTONEG_ENABLE != phydev->autoneg) |
841 | return genphy_setup_forced(phydev); | |
00db8189 | 842 | |
de339c2a | 843 | result = genphy_config_advert(phydev); |
de339c2a TP |
844 | if (result < 0) /* error */ |
845 | return result; | |
de339c2a | 846 | if (result == 0) { |
25985edc | 847 | /* Advertisement hasn't changed, but maybe aneg was never on to |
2f53e904 SS |
848 | * begin with? Or maybe phy was isolated? |
849 | */ | |
de339c2a TP |
850 | int ctl = phy_read(phydev, MII_BMCR); |
851 | ||
852 | if (ctl < 0) | |
853 | return ctl; | |
854 | ||
855 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) | |
856 | result = 1; /* do restart aneg */ | |
857 | } | |
858 | ||
859 | /* Only restart aneg if we are advertising something different | |
2f53e904 SS |
860 | * than we were before. |
861 | */ | |
de339c2a TP |
862 | if (result > 0) |
863 | result = genphy_restart_aneg(phydev); | |
00db8189 | 864 | |
51e2a384 | 865 | return result; |
00db8189 AF |
866 | } |
867 | EXPORT_SYMBOL(genphy_config_aneg); | |
868 | ||
a9fa6e6a FF |
869 | /** |
870 | * genphy_aneg_done - return auto-negotiation status | |
871 | * @phydev: target phy_device struct | |
872 | * | |
873 | * Description: Reads the status register and returns 0 either if | |
874 | * auto-negotiation is incomplete, or if there was an error. | |
875 | * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. | |
876 | */ | |
877 | int genphy_aneg_done(struct phy_device *phydev) | |
878 | { | |
879 | int retval = phy_read(phydev, MII_BMSR); | |
880 | ||
881 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); | |
882 | } | |
883 | EXPORT_SYMBOL(genphy_aneg_done); | |
884 | ||
395056ed | 885 | static int gen10g_config_aneg(struct phy_device *phydev) |
124059fd AF |
886 | { |
887 | return 0; | |
888 | } | |
124059fd | 889 | |
b3df0da8 RD |
890 | /** |
891 | * genphy_update_link - update link status in @phydev | |
892 | * @phydev: target phy_device struct | |
00db8189 | 893 | * |
b3df0da8 | 894 | * Description: Update the value in phydev->link to reflect the |
00db8189 | 895 | * current link value. In order to do this, we need to read |
b3df0da8 | 896 | * the status register twice, keeping the second value. |
00db8189 AF |
897 | */ |
898 | int genphy_update_link(struct phy_device *phydev) | |
899 | { | |
900 | int status; | |
901 | ||
902 | /* Do a fake read */ | |
903 | status = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
904 | if (status < 0) |
905 | return status; | |
906 | ||
907 | /* Read link and autonegotiation status */ | |
908 | status = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
909 | if (status < 0) |
910 | return status; | |
911 | ||
912 | if ((status & BMSR_LSTATUS) == 0) | |
913 | phydev->link = 0; | |
914 | else | |
915 | phydev->link = 1; | |
916 | ||
917 | return 0; | |
918 | } | |
6b655529 | 919 | EXPORT_SYMBOL(genphy_update_link); |
00db8189 | 920 | |
b3df0da8 RD |
921 | /** |
922 | * genphy_read_status - check the link status and update current link state | |
923 | * @phydev: target phy_device struct | |
00db8189 | 924 | * |
b3df0da8 | 925 | * Description: Check the link, then figure out the current state |
00db8189 AF |
926 | * by comparing what we advertise with what the link partner |
927 | * advertises. Start by checking the gigabit possibilities, | |
928 | * then move on to 10/100. | |
929 | */ | |
930 | int genphy_read_status(struct phy_device *phydev) | |
931 | { | |
932 | int adv; | |
933 | int err; | |
934 | int lpa; | |
935 | int lpagb = 0; | |
a4572e0c CB |
936 | int common_adv; |
937 | int common_adv_gb = 0; | |
00db8189 | 938 | |
2f53e904 | 939 | /* Update the link, but return if there was an error */ |
00db8189 AF |
940 | err = genphy_update_link(phydev); |
941 | if (err) | |
942 | return err; | |
943 | ||
114002bc FF |
944 | phydev->lp_advertising = 0; |
945 | ||
00db8189 AF |
946 | if (AUTONEG_ENABLE == phydev->autoneg) { |
947 | if (phydev->supported & (SUPPORTED_1000baseT_Half | |
948 | | SUPPORTED_1000baseT_Full)) { | |
949 | lpagb = phy_read(phydev, MII_STAT1000); | |
00db8189 AF |
950 | if (lpagb < 0) |
951 | return lpagb; | |
952 | ||
953 | adv = phy_read(phydev, MII_CTRL1000); | |
00db8189 AF |
954 | if (adv < 0) |
955 | return adv; | |
956 | ||
114002bc FF |
957 | phydev->lp_advertising = |
958 | mii_stat1000_to_ethtool_lpa_t(lpagb); | |
a4572e0c | 959 | common_adv_gb = lpagb & adv << 2; |
00db8189 AF |
960 | } |
961 | ||
962 | lpa = phy_read(phydev, MII_LPA); | |
00db8189 AF |
963 | if (lpa < 0) |
964 | return lpa; | |
965 | ||
114002bc FF |
966 | phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa); |
967 | ||
00db8189 | 968 | adv = phy_read(phydev, MII_ADVERTISE); |
00db8189 AF |
969 | if (adv < 0) |
970 | return adv; | |
971 | ||
a4572e0c | 972 | common_adv = lpa & adv; |
00db8189 AF |
973 | |
974 | phydev->speed = SPEED_10; | |
975 | phydev->duplex = DUPLEX_HALF; | |
2f53e904 SS |
976 | phydev->pause = 0; |
977 | phydev->asym_pause = 0; | |
00db8189 | 978 | |
a4572e0c | 979 | if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) { |
00db8189 AF |
980 | phydev->speed = SPEED_1000; |
981 | ||
a4572e0c | 982 | if (common_adv_gb & LPA_1000FULL) |
00db8189 | 983 | phydev->duplex = DUPLEX_FULL; |
a4572e0c | 984 | } else if (common_adv & (LPA_100FULL | LPA_100HALF)) { |
00db8189 | 985 | phydev->speed = SPEED_100; |
e109374f | 986 | |
a4572e0c | 987 | if (common_adv & LPA_100FULL) |
00db8189 AF |
988 | phydev->duplex = DUPLEX_FULL; |
989 | } else | |
a4572e0c | 990 | if (common_adv & LPA_10FULL) |
00db8189 AF |
991 | phydev->duplex = DUPLEX_FULL; |
992 | ||
e109374f | 993 | if (phydev->duplex == DUPLEX_FULL) { |
00db8189 AF |
994 | phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; |
995 | phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; | |
996 | } | |
997 | } else { | |
998 | int bmcr = phy_read(phydev, MII_BMCR); | |
2f53e904 | 999 | |
00db8189 AF |
1000 | if (bmcr < 0) |
1001 | return bmcr; | |
1002 | ||
1003 | if (bmcr & BMCR_FULLDPLX) | |
1004 | phydev->duplex = DUPLEX_FULL; | |
1005 | else | |
1006 | phydev->duplex = DUPLEX_HALF; | |
1007 | ||
1008 | if (bmcr & BMCR_SPEED1000) | |
1009 | phydev->speed = SPEED_1000; | |
1010 | else if (bmcr & BMCR_SPEED100) | |
1011 | phydev->speed = SPEED_100; | |
1012 | else | |
1013 | phydev->speed = SPEED_10; | |
1014 | ||
2f53e904 SS |
1015 | phydev->pause = 0; |
1016 | phydev->asym_pause = 0; | |
00db8189 AF |
1017 | } |
1018 | ||
1019 | return 0; | |
1020 | } | |
1021 | EXPORT_SYMBOL(genphy_read_status); | |
1022 | ||
395056ed | 1023 | static int gen10g_read_status(struct phy_device *phydev) |
124059fd AF |
1024 | { |
1025 | int devad, reg; | |
1026 | u32 mmd_mask = phydev->c45_ids.devices_in_package; | |
1027 | ||
1028 | phydev->link = 1; | |
1029 | ||
1030 | /* For now just lie and say it's 10G all the time */ | |
1031 | phydev->speed = SPEED_10000; | |
1032 | phydev->duplex = DUPLEX_FULL; | |
1033 | ||
1034 | for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) { | |
1035 | if (!(mmd_mask & 1)) | |
1036 | continue; | |
1037 | ||
1038 | /* Read twice because link state is latched and a | |
1039 | * read moves the current state into the register | |
1040 | */ | |
1041 | phy_read_mmd(phydev, devad, MDIO_STAT1); | |
1042 | reg = phy_read_mmd(phydev, devad, MDIO_STAT1); | |
1043 | if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS)) | |
1044 | phydev->link = 0; | |
1045 | } | |
1046 | ||
1047 | return 0; | |
1048 | } | |
124059fd | 1049 | |
797ac071 FF |
1050 | /** |
1051 | * genphy_soft_reset - software reset the PHY via BMCR_RESET bit | |
1052 | * @phydev: target phy_device struct | |
1053 | * | |
1054 | * Description: Perform a software PHY reset using the standard | |
1055 | * BMCR_RESET bit and poll for the reset bit to be cleared. | |
1056 | * | |
1057 | * Returns: 0 on success, < 0 on failure | |
1058 | */ | |
1059 | int genphy_soft_reset(struct phy_device *phydev) | |
1060 | { | |
1061 | int ret; | |
1062 | ||
1063 | ret = phy_write(phydev, MII_BMCR, BMCR_RESET); | |
1064 | if (ret < 0) | |
1065 | return ret; | |
1066 | ||
1067 | return phy_poll_reset(phydev); | |
1068 | } | |
1069 | EXPORT_SYMBOL(genphy_soft_reset); | |
1070 | ||
af6b6967 | 1071 | int genphy_config_init(struct phy_device *phydev) |
00db8189 | 1072 | { |
84c22d79 | 1073 | int val; |
00db8189 AF |
1074 | u32 features; |
1075 | ||
00db8189 AF |
1076 | features = (SUPPORTED_TP | SUPPORTED_MII |
1077 | | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
1078 | SUPPORTED_BNC); | |
1079 | ||
1080 | /* Do we support autonegotiation? */ | |
1081 | val = phy_read(phydev, MII_BMSR); | |
00db8189 AF |
1082 | if (val < 0) |
1083 | return val; | |
1084 | ||
1085 | if (val & BMSR_ANEGCAPABLE) | |
1086 | features |= SUPPORTED_Autoneg; | |
1087 | ||
1088 | if (val & BMSR_100FULL) | |
1089 | features |= SUPPORTED_100baseT_Full; | |
1090 | if (val & BMSR_100HALF) | |
1091 | features |= SUPPORTED_100baseT_Half; | |
1092 | if (val & BMSR_10FULL) | |
1093 | features |= SUPPORTED_10baseT_Full; | |
1094 | if (val & BMSR_10HALF) | |
1095 | features |= SUPPORTED_10baseT_Half; | |
1096 | ||
1097 | if (val & BMSR_ESTATEN) { | |
1098 | val = phy_read(phydev, MII_ESTATUS); | |
00db8189 AF |
1099 | if (val < 0) |
1100 | return val; | |
1101 | ||
1102 | if (val & ESTATUS_1000_TFULL) | |
1103 | features |= SUPPORTED_1000baseT_Full; | |
1104 | if (val & ESTATUS_1000_THALF) | |
1105 | features |= SUPPORTED_1000baseT_Half; | |
1106 | } | |
1107 | ||
c242a472 SH |
1108 | phydev->supported &= features; |
1109 | phydev->advertising &= features; | |
00db8189 AF |
1110 | |
1111 | return 0; | |
1112 | } | |
124059fd | 1113 | |
9df81dd7 FF |
1114 | static int gen10g_soft_reset(struct phy_device *phydev) |
1115 | { | |
1116 | /* Do nothing for now */ | |
1117 | return 0; | |
1118 | } | |
af6b6967 | 1119 | EXPORT_SYMBOL(genphy_config_init); |
9df81dd7 | 1120 | |
124059fd AF |
1121 | static int gen10g_config_init(struct phy_device *phydev) |
1122 | { | |
1123 | /* Temporarily just say we support everything */ | |
1124 | phydev->supported = SUPPORTED_10000baseT_Full; | |
1125 | phydev->advertising = SUPPORTED_10000baseT_Full; | |
1126 | ||
1127 | return 0; | |
1128 | } | |
1129 | ||
0f0ca340 GC |
1130 | int genphy_suspend(struct phy_device *phydev) |
1131 | { | |
1132 | int value; | |
1133 | ||
1134 | mutex_lock(&phydev->lock); | |
1135 | ||
1136 | value = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1137 | phy_write(phydev, MII_BMCR, value | BMCR_PDOWN); |
0f0ca340 GC |
1138 | |
1139 | mutex_unlock(&phydev->lock); | |
1140 | ||
1141 | return 0; | |
1142 | } | |
1143 | EXPORT_SYMBOL(genphy_suspend); | |
00db8189 | 1144 | |
395056ed | 1145 | static int gen10g_suspend(struct phy_device *phydev) |
124059fd AF |
1146 | { |
1147 | return 0; | |
1148 | } | |
124059fd | 1149 | |
0f0ca340 GC |
1150 | int genphy_resume(struct phy_device *phydev) |
1151 | { | |
1152 | int value; | |
1153 | ||
1154 | mutex_lock(&phydev->lock); | |
1155 | ||
1156 | value = phy_read(phydev, MII_BMCR); | |
2f53e904 | 1157 | phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN); |
0f0ca340 GC |
1158 | |
1159 | mutex_unlock(&phydev->lock); | |
1160 | ||
1161 | return 0; | |
1162 | } | |
1163 | EXPORT_SYMBOL(genphy_resume); | |
00db8189 | 1164 | |
395056ed | 1165 | static int gen10g_resume(struct phy_device *phydev) |
124059fd AF |
1166 | { |
1167 | return 0; | |
1168 | } | |
124059fd | 1169 | |
de906af1 SH |
1170 | static void of_set_phy_supported(struct phy_device *phydev) |
1171 | { | |
1172 | struct device_node *node = phydev->dev.of_node; | |
1173 | u32 max_speed; | |
1174 | ||
1175 | if (!IS_ENABLED(CONFIG_OF_MDIO)) | |
1176 | return; | |
1177 | ||
1178 | if (!node) | |
1179 | return; | |
1180 | ||
1181 | if (!of_property_read_u32(node, "max-speed", &max_speed)) { | |
1182 | /* The default values for phydev->supported are provided by the PHY | |
1183 | * driver "features" member, we want to reset to sane defaults fist | |
1184 | * before supporting higher speeds. | |
1185 | */ | |
1186 | phydev->supported &= PHY_DEFAULT_FEATURES; | |
1187 | ||
1188 | switch (max_speed) { | |
1189 | default: | |
1190 | return; | |
1191 | ||
1192 | case SPEED_1000: | |
1193 | phydev->supported |= PHY_1000BT_FEATURES; | |
1194 | case SPEED_100: | |
1195 | phydev->supported |= PHY_100BT_FEATURES; | |
1196 | case SPEED_10: | |
1197 | phydev->supported |= PHY_10BT_FEATURES; | |
1198 | } | |
1199 | } | |
1200 | } | |
1201 | ||
b3df0da8 RD |
1202 | /** |
1203 | * phy_probe - probe and init a PHY device | |
1204 | * @dev: device to probe and init | |
00db8189 | 1205 | * |
b3df0da8 | 1206 | * Description: Take care of setting up the phy_device structure, |
00db8189 AF |
1207 | * set the state to READY (the driver's init function should |
1208 | * set it to STARTING if needed). | |
1209 | */ | |
1210 | static int phy_probe(struct device *dev) | |
1211 | { | |
553fe92b SS |
1212 | struct phy_device *phydev = to_phy_device(dev); |
1213 | struct device_driver *drv = phydev->dev.driver; | |
1214 | struct phy_driver *phydrv = to_phy_driver(drv); | |
00db8189 AF |
1215 | int err = 0; |
1216 | ||
00db8189 AF |
1217 | phydev->drv = phydrv; |
1218 | ||
2c7b4921 FF |
1219 | /* Disable the interrupt if the PHY doesn't support it |
1220 | * but the interrupt is still a valid one | |
1221 | */ | |
1222 | if (!(phydrv->flags & PHY_HAS_INTERRUPT) && | |
2f53e904 | 1223 | phy_interrupt_is_valid(phydev)) |
00db8189 AF |
1224 | phydev->irq = PHY_POLL; |
1225 | ||
4284b6a5 FF |
1226 | if (phydrv->flags & PHY_IS_INTERNAL) |
1227 | phydev->is_internal = true; | |
1228 | ||
35b5f6b1 | 1229 | mutex_lock(&phydev->lock); |
00db8189 AF |
1230 | |
1231 | /* Start out supporting everything. Eventually, | |
1232 | * a controller will attach, and may modify one | |
2f53e904 SS |
1233 | * or both of these values |
1234 | */ | |
00db8189 | 1235 | phydev->supported = phydrv->features; |
de906af1 SH |
1236 | of_set_phy_supported(phydev); |
1237 | phydev->advertising = phydev->supported; | |
00db8189 AF |
1238 | |
1239 | /* Set the state to READY by default */ | |
1240 | phydev->state = PHY_READY; | |
1241 | ||
1242 | if (phydev->drv->probe) | |
1243 | err = phydev->drv->probe(phydev); | |
1244 | ||
35b5f6b1 | 1245 | mutex_unlock(&phydev->lock); |
00db8189 | 1246 | |
00db8189 AF |
1247 | return err; |
1248 | } | |
1249 | ||
1250 | static int phy_remove(struct device *dev) | |
1251 | { | |
553fe92b | 1252 | struct phy_device *phydev = to_phy_device(dev); |
00db8189 | 1253 | |
35b5f6b1 | 1254 | mutex_lock(&phydev->lock); |
00db8189 | 1255 | phydev->state = PHY_DOWN; |
35b5f6b1 | 1256 | mutex_unlock(&phydev->lock); |
00db8189 AF |
1257 | |
1258 | if (phydev->drv->remove) | |
1259 | phydev->drv->remove(phydev); | |
00db8189 AF |
1260 | phydev->drv = NULL; |
1261 | ||
1262 | return 0; | |
1263 | } | |
1264 | ||
b3df0da8 RD |
1265 | /** |
1266 | * phy_driver_register - register a phy_driver with the PHY layer | |
1267 | * @new_driver: new phy_driver to register | |
1268 | */ | |
00db8189 AF |
1269 | int phy_driver_register(struct phy_driver *new_driver) |
1270 | { | |
1271 | int retval; | |
1272 | ||
00db8189 AF |
1273 | new_driver->driver.name = new_driver->name; |
1274 | new_driver->driver.bus = &mdio_bus_type; | |
1275 | new_driver->driver.probe = phy_probe; | |
1276 | new_driver->driver.remove = phy_remove; | |
1277 | ||
1278 | retval = driver_register(&new_driver->driver); | |
00db8189 | 1279 | if (retval) { |
8d242488 JP |
1280 | pr_err("%s: Error %d in registering driver\n", |
1281 | new_driver->name, retval); | |
00db8189 AF |
1282 | |
1283 | return retval; | |
1284 | } | |
1285 | ||
f2511f13 | 1286 | pr_debug("%s: Registered new driver\n", new_driver->name); |
00db8189 AF |
1287 | |
1288 | return 0; | |
1289 | } | |
1290 | EXPORT_SYMBOL(phy_driver_register); | |
1291 | ||
d5bf9071 CH |
1292 | int phy_drivers_register(struct phy_driver *new_driver, int n) |
1293 | { | |
1294 | int i, ret = 0; | |
1295 | ||
1296 | for (i = 0; i < n; i++) { | |
1297 | ret = phy_driver_register(new_driver + i); | |
1298 | if (ret) { | |
1299 | while (i-- > 0) | |
1300 | phy_driver_unregister(new_driver + i); | |
1301 | break; | |
1302 | } | |
1303 | } | |
1304 | return ret; | |
1305 | } | |
1306 | EXPORT_SYMBOL(phy_drivers_register); | |
1307 | ||
00db8189 AF |
1308 | void phy_driver_unregister(struct phy_driver *drv) |
1309 | { | |
1310 | driver_unregister(&drv->driver); | |
1311 | } | |
1312 | EXPORT_SYMBOL(phy_driver_unregister); | |
1313 | ||
d5bf9071 CH |
1314 | void phy_drivers_unregister(struct phy_driver *drv, int n) |
1315 | { | |
1316 | int i; | |
2f53e904 SS |
1317 | |
1318 | for (i = 0; i < n; i++) | |
d5bf9071 | 1319 | phy_driver_unregister(drv + i); |
d5bf9071 CH |
1320 | } |
1321 | EXPORT_SYMBOL(phy_drivers_unregister); | |
1322 | ||
ab2145ed SX |
1323 | static struct phy_driver genphy_driver[] = { |
1324 | { | |
e1393456 AF |
1325 | .phy_id = 0xffffffff, |
1326 | .phy_id_mask = 0xffffffff, | |
1327 | .name = "Generic PHY", | |
9df81dd7 | 1328 | .soft_reset = genphy_soft_reset, |
e1393456 | 1329 | .config_init = genphy_config_init, |
c242a472 SH |
1330 | .features = PHY_GBIT_FEATURES | SUPPORTED_MII | |
1331 | SUPPORTED_AUI | SUPPORTED_FIBRE | | |
1332 | SUPPORTED_BNC, | |
e1393456 | 1333 | .config_aneg = genphy_config_aneg, |
76a423a3 | 1334 | .aneg_done = genphy_aneg_done, |
e1393456 | 1335 | .read_status = genphy_read_status, |
0f0ca340 GC |
1336 | .suspend = genphy_suspend, |
1337 | .resume = genphy_resume, | |
e109374f | 1338 | .driver = { .owner = THIS_MODULE, }, |
124059fd AF |
1339 | }, { |
1340 | .phy_id = 0xffffffff, | |
1341 | .phy_id_mask = 0xffffffff, | |
1342 | .name = "Generic 10G PHY", | |
9df81dd7 | 1343 | .soft_reset = gen10g_soft_reset, |
124059fd AF |
1344 | .config_init = gen10g_config_init, |
1345 | .features = 0, | |
1346 | .config_aneg = gen10g_config_aneg, | |
1347 | .read_status = gen10g_read_status, | |
1348 | .suspend = gen10g_suspend, | |
1349 | .resume = gen10g_resume, | |
1350 | .driver = {.owner = THIS_MODULE, }, | |
ab2145ed | 1351 | } }; |
00db8189 | 1352 | |
67c4f3fa | 1353 | static int __init phy_init(void) |
00db8189 | 1354 | { |
67c4f3fa | 1355 | int rc; |
67c4f3fa JG |
1356 | |
1357 | rc = mdio_bus_init(); | |
1358 | if (rc) | |
e1393456 | 1359 | return rc; |
00db8189 | 1360 | |
ab2145ed SX |
1361 | rc = phy_drivers_register(genphy_driver, |
1362 | ARRAY_SIZE(genphy_driver)); | |
e1393456 AF |
1363 | if (rc) |
1364 | mdio_bus_exit(); | |
67c4f3fa | 1365 | |
67c4f3fa | 1366 | return rc; |
00db8189 AF |
1367 | } |
1368 | ||
67c4f3fa | 1369 | static void __exit phy_exit(void) |
00db8189 | 1370 | { |
ab2145ed SX |
1371 | phy_drivers_unregister(genphy_driver, |
1372 | ARRAY_SIZE(genphy_driver)); | |
e1393456 | 1373 | mdio_bus_exit(); |
00db8189 AF |
1374 | } |
1375 | ||
e1393456 | 1376 | subsys_initcall(phy_init); |
67c4f3fa | 1377 | module_exit(phy_exit); |