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2f53e904 | 1 | /* Framework for configuring and reading PHY devices |
00db8189 AF |
2 | * Based on code in sungem_phy.c and gianfar_phy.c |
3 | * | |
4 | * Author: Andy Fleming | |
5 | * | |
6 | * Copyright (c) 2004 Freescale Semiconductor, Inc. | |
0ac49527 | 7 | * Copyright (c) 2006, 2007 Maciej W. Rozycki |
00db8189 AF |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | */ | |
8d242488 JP |
15 | |
16 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
17 | ||
00db8189 | 18 | #include <linux/kernel.h> |
00db8189 AF |
19 | #include <linux/string.h> |
20 | #include <linux/errno.h> | |
21 | #include <linux/unistd.h> | |
00db8189 | 22 | #include <linux/interrupt.h> |
00db8189 AF |
23 | #include <linux/delay.h> |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/etherdevice.h> | |
26 | #include <linux/skbuff.h> | |
00db8189 AF |
27 | #include <linux/mm.h> |
28 | #include <linux/module.h> | |
00db8189 AF |
29 | #include <linux/mii.h> |
30 | #include <linux/ethtool.h> | |
31 | #include <linux/phy.h> | |
d6f8cfa3 | 32 | #include <linux/phy_led_triggers.h> |
3c3070d7 | 33 | #include <linux/workqueue.h> |
a59a4d19 | 34 | #include <linux/mdio.h> |
2f53e904 SS |
35 | #include <linux/io.h> |
36 | #include <linux/uaccess.h> | |
60063497 | 37 | #include <linux/atomic.h> |
2f53e904 | 38 | |
00db8189 | 39 | #include <asm/irq.h> |
00db8189 | 40 | |
3e2186e0 FF |
41 | #define PHY_STATE_STR(_state) \ |
42 | case PHY_##_state: \ | |
43 | return __stringify(_state); \ | |
44 | ||
45 | static const char *phy_state_to_str(enum phy_state st) | |
46 | { | |
47 | switch (st) { | |
48 | PHY_STATE_STR(DOWN) | |
49 | PHY_STATE_STR(STARTING) | |
50 | PHY_STATE_STR(READY) | |
51 | PHY_STATE_STR(PENDING) | |
52 | PHY_STATE_STR(UP) | |
53 | PHY_STATE_STR(AN) | |
54 | PHY_STATE_STR(RUNNING) | |
55 | PHY_STATE_STR(NOLINK) | |
56 | PHY_STATE_STR(FORCING) | |
57 | PHY_STATE_STR(CHANGELINK) | |
58 | PHY_STATE_STR(HALTED) | |
59 | PHY_STATE_STR(RESUMING) | |
60 | } | |
61 | ||
62 | return NULL; | |
63 | } | |
64 | ||
65 | ||
b3df0da8 RD |
66 | /** |
67 | * phy_print_status - Convenience function to print out the current phy status | |
68 | * @phydev: the phy_device struct | |
e1393456 AF |
69 | */ |
70 | void phy_print_status(struct phy_device *phydev) | |
71 | { | |
2f53e904 | 72 | if (phydev->link) { |
df40cc88 | 73 | netdev_info(phydev->attached_dev, |
766d1d38 FF |
74 | "Link is Up - %s/%s - flow control %s\n", |
75 | phy_speed_to_str(phydev->speed), | |
da4625ac | 76 | phy_duplex_to_str(phydev->duplex), |
df40cc88 | 77 | phydev->pause ? "rx/tx" : "off"); |
2f53e904 | 78 | } else { |
43b6329f | 79 | netdev_info(phydev->attached_dev, "Link is Down\n"); |
2f53e904 | 80 | } |
e1393456 AF |
81 | } |
82 | EXPORT_SYMBOL(phy_print_status); | |
00db8189 | 83 | |
b3df0da8 RD |
84 | /** |
85 | * phy_clear_interrupt - Ack the phy device's interrupt | |
86 | * @phydev: the phy_device struct | |
87 | * | |
88 | * If the @phydev driver has an ack_interrupt function, call it to | |
89 | * ack and clear the phy device's interrupt. | |
90 | * | |
ad033506 | 91 | * Returns 0 on success or < 0 on error. |
b3df0da8 | 92 | */ |
89ff05ec | 93 | static int phy_clear_interrupt(struct phy_device *phydev) |
00db8189 | 94 | { |
00db8189 | 95 | if (phydev->drv->ack_interrupt) |
e62a768f | 96 | return phydev->drv->ack_interrupt(phydev); |
00db8189 | 97 | |
e62a768f | 98 | return 0; |
00db8189 AF |
99 | } |
100 | ||
b3df0da8 RD |
101 | /** |
102 | * phy_config_interrupt - configure the PHY device for the requested interrupts | |
103 | * @phydev: the phy_device struct | |
104 | * @interrupts: interrupt flags to configure for this @phydev | |
105 | * | |
ad033506 | 106 | * Returns 0 on success or < 0 on error. |
b3df0da8 | 107 | */ |
89ff05ec | 108 | static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts) |
00db8189 | 109 | { |
00db8189 AF |
110 | phydev->interrupts = interrupts; |
111 | if (phydev->drv->config_intr) | |
e62a768f | 112 | return phydev->drv->config_intr(phydev); |
00db8189 | 113 | |
e62a768f | 114 | return 0; |
00db8189 AF |
115 | } |
116 | ||
002ba705 RK |
117 | /** |
118 | * phy_restart_aneg - restart auto-negotiation | |
119 | * @phydev: target phy_device struct | |
120 | * | |
121 | * Restart the autonegotiation on @phydev. Returns >= 0 on success or | |
122 | * negative errno on error. | |
123 | */ | |
124 | int phy_restart_aneg(struct phy_device *phydev) | |
125 | { | |
126 | int ret; | |
127 | ||
128 | if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0))) | |
129 | ret = genphy_c45_restart_aneg(phydev); | |
130 | else | |
131 | ret = genphy_restart_aneg(phydev); | |
132 | ||
133 | return ret; | |
134 | } | |
135 | EXPORT_SYMBOL_GPL(phy_restart_aneg); | |
00db8189 | 136 | |
b3df0da8 RD |
137 | /** |
138 | * phy_aneg_done - return auto-negotiation status | |
139 | * @phydev: target phy_device struct | |
00db8189 | 140 | * |
76a423a3 FF |
141 | * Description: Return the auto-negotiation status from this @phydev |
142 | * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation | |
143 | * is still pending. | |
00db8189 | 144 | */ |
372788f9 | 145 | int phy_aneg_done(struct phy_device *phydev) |
00db8189 | 146 | { |
65f2767a | 147 | if (phydev->drv && phydev->drv->aneg_done) |
76a423a3 FF |
148 | return phydev->drv->aneg_done(phydev); |
149 | ||
41408ad5 RK |
150 | /* Avoid genphy_aneg_done() if the Clause 45 PHY does not |
151 | * implement Clause 22 registers | |
152 | */ | |
153 | if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0))) | |
154 | return -EINVAL; | |
155 | ||
a9fa6e6a | 156 | return genphy_aneg_done(phydev); |
00db8189 | 157 | } |
372788f9 | 158 | EXPORT_SYMBOL(phy_aneg_done); |
00db8189 | 159 | |
b3df0da8 | 160 | /** |
d0613037 RK |
161 | * phy_find_valid - find a PHY setting that matches the requested parameters |
162 | * @speed: desired speed | |
163 | * @duplex: desired duplex | |
164 | * @supported: mask of supported link modes | |
00db8189 | 165 | * |
d0613037 RK |
166 | * Locate a supported phy setting that is, in priority order: |
167 | * - an exact match for the specified speed and duplex mode | |
168 | * - a match for the specified speed, or slower speed | |
169 | * - the slowest supported speed | |
170 | * Returns the matched phy_setting entry, or %NULL if no supported phy | |
171 | * settings were found. | |
00db8189 | 172 | */ |
d0613037 RK |
173 | static const struct phy_setting * |
174 | phy_find_valid(int speed, int duplex, u32 supported) | |
00db8189 | 175 | { |
c3ecbe75 RK |
176 | unsigned long mask = supported; |
177 | ||
178 | return phy_lookup_setting(speed, duplex, &mask, BITS_PER_LONG, false); | |
00db8189 AF |
179 | } |
180 | ||
1f9127ca ZB |
181 | /** |
182 | * phy_supported_speeds - return all speeds currently supported by a phy device | |
183 | * @phy: The phy device to return supported speeds of. | |
184 | * @speeds: buffer to store supported speeds in. | |
185 | * @size: size of speeds buffer. | |
186 | * | |
187 | * Description: Returns the number of supported speeds, and fills the speeds | |
188 | * buffer with the supported speeds. If speeds buffer is too small to contain | |
189 | * all currently supported speeds, will return as many speeds as can fit. | |
190 | */ | |
191 | unsigned int phy_supported_speeds(struct phy_device *phy, | |
192 | unsigned int *speeds, | |
193 | unsigned int size) | |
194 | { | |
c3ecbe75 | 195 | unsigned long supported = phy->supported; |
1f9127ca | 196 | |
0ccb4fc6 | 197 | return phy_speeds(speeds, size, &supported, BITS_PER_LONG); |
1f9127ca ZB |
198 | } |
199 | ||
54da5a8b GR |
200 | /** |
201 | * phy_check_valid - check if there is a valid PHY setting which matches | |
202 | * speed, duplex, and feature mask | |
203 | * @speed: speed to match | |
204 | * @duplex: duplex to match | |
205 | * @features: A mask of the valid settings | |
206 | * | |
207 | * Description: Returns true if there is a valid setting, false otherwise. | |
208 | */ | |
209 | static inline bool phy_check_valid(int speed, int duplex, u32 features) | |
210 | { | |
c3ecbe75 RK |
211 | unsigned long mask = features; |
212 | ||
213 | return !!phy_lookup_setting(speed, duplex, &mask, BITS_PER_LONG, true); | |
54da5a8b GR |
214 | } |
215 | ||
b3df0da8 RD |
216 | /** |
217 | * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex | |
218 | * @phydev: the target phy_device struct | |
00db8189 | 219 | * |
b3df0da8 | 220 | * Description: Make sure the PHY is set to supported speeds and |
00db8189 | 221 | * duplexes. Drop down by one in this order: 1000/FULL, |
b3df0da8 | 222 | * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF. |
00db8189 | 223 | */ |
89ff05ec | 224 | static void phy_sanitize_settings(struct phy_device *phydev) |
00db8189 | 225 | { |
d0613037 | 226 | const struct phy_setting *setting; |
00db8189 | 227 | u32 features = phydev->supported; |
00db8189 AF |
228 | |
229 | /* Sanitize settings based on PHY capabilities */ | |
230 | if ((features & SUPPORTED_Autoneg) == 0) | |
163642a2 | 231 | phydev->autoneg = AUTONEG_DISABLE; |
00db8189 | 232 | |
d0613037 RK |
233 | setting = phy_find_valid(phydev->speed, phydev->duplex, features); |
234 | if (setting) { | |
235 | phydev->speed = setting->speed; | |
236 | phydev->duplex = setting->duplex; | |
237 | } else { | |
238 | /* We failed to find anything (no supported speeds?) */ | |
239 | phydev->speed = SPEED_UNKNOWN; | |
240 | phydev->duplex = DUPLEX_UNKNOWN; | |
241 | } | |
00db8189 | 242 | } |
00db8189 | 243 | |
b3df0da8 RD |
244 | /** |
245 | * phy_ethtool_sset - generic ethtool sset function, handles all the details | |
246 | * @phydev: target phy_device struct | |
247 | * @cmd: ethtool_cmd | |
00db8189 AF |
248 | * |
249 | * A few notes about parameter checking: | |
d651983d | 250 | * |
00db8189 AF |
251 | * - We don't set port or transceiver, so we don't care what they |
252 | * were set to. | |
253 | * - phy_start_aneg() will make sure forced settings are sane, and | |
254 | * choose the next best ones from the ones selected, so we don't | |
b3df0da8 | 255 | * care if ethtool tries to give us bad values. |
00db8189 AF |
256 | */ |
257 | int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd) | |
258 | { | |
25db0338 DD |
259 | u32 speed = ethtool_cmd_speed(cmd); |
260 | ||
e5a03bfd | 261 | if (cmd->phy_address != phydev->mdio.addr) |
00db8189 AF |
262 | return -EINVAL; |
263 | ||
2f53e904 | 264 | /* We make sure that we don't pass unsupported values in to the PHY */ |
00db8189 AF |
265 | cmd->advertising &= phydev->supported; |
266 | ||
267 | /* Verify the settings we care about. */ | |
268 | if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) | |
269 | return -EINVAL; | |
270 | ||
271 | if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) | |
272 | return -EINVAL; | |
273 | ||
8e95a202 | 274 | if (cmd->autoneg == AUTONEG_DISABLE && |
25db0338 DD |
275 | ((speed != SPEED_1000 && |
276 | speed != SPEED_100 && | |
277 | speed != SPEED_10) || | |
8e95a202 JP |
278 | (cmd->duplex != DUPLEX_HALF && |
279 | cmd->duplex != DUPLEX_FULL))) | |
00db8189 AF |
280 | return -EINVAL; |
281 | ||
282 | phydev->autoneg = cmd->autoneg; | |
283 | ||
25db0338 | 284 | phydev->speed = speed; |
00db8189 AF |
285 | |
286 | phydev->advertising = cmd->advertising; | |
287 | ||
288 | if (AUTONEG_ENABLE == cmd->autoneg) | |
289 | phydev->advertising |= ADVERTISED_Autoneg; | |
290 | else | |
291 | phydev->advertising &= ~ADVERTISED_Autoneg; | |
292 | ||
293 | phydev->duplex = cmd->duplex; | |
294 | ||
1004ee61 | 295 | phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl; |
634ec36c | 296 | |
00db8189 AF |
297 | /* Restart the PHY */ |
298 | phy_start_aneg(phydev); | |
299 | ||
300 | return 0; | |
301 | } | |
9f6d55d0 | 302 | EXPORT_SYMBOL(phy_ethtool_sset); |
00db8189 | 303 | |
2d55173e PR |
304 | int phy_ethtool_ksettings_set(struct phy_device *phydev, |
305 | const struct ethtool_link_ksettings *cmd) | |
306 | { | |
307 | u8 autoneg = cmd->base.autoneg; | |
308 | u8 duplex = cmd->base.duplex; | |
309 | u32 speed = cmd->base.speed; | |
310 | u32 advertising; | |
311 | ||
312 | if (cmd->base.phy_address != phydev->mdio.addr) | |
313 | return -EINVAL; | |
314 | ||
315 | ethtool_convert_link_mode_to_legacy_u32(&advertising, | |
316 | cmd->link_modes.advertising); | |
317 | ||
318 | /* We make sure that we don't pass unsupported values in to the PHY */ | |
319 | advertising &= phydev->supported; | |
320 | ||
321 | /* Verify the settings we care about. */ | |
322 | if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE) | |
323 | return -EINVAL; | |
324 | ||
325 | if (autoneg == AUTONEG_ENABLE && advertising == 0) | |
326 | return -EINVAL; | |
327 | ||
328 | if (autoneg == AUTONEG_DISABLE && | |
329 | ((speed != SPEED_1000 && | |
330 | speed != SPEED_100 && | |
331 | speed != SPEED_10) || | |
332 | (duplex != DUPLEX_HALF && | |
333 | duplex != DUPLEX_FULL))) | |
334 | return -EINVAL; | |
335 | ||
336 | phydev->autoneg = autoneg; | |
337 | ||
338 | phydev->speed = speed; | |
339 | ||
340 | phydev->advertising = advertising; | |
341 | ||
342 | if (autoneg == AUTONEG_ENABLE) | |
343 | phydev->advertising |= ADVERTISED_Autoneg; | |
344 | else | |
345 | phydev->advertising &= ~ADVERTISED_Autoneg; | |
346 | ||
347 | phydev->duplex = duplex; | |
348 | ||
1004ee61 | 349 | phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl; |
2d55173e PR |
350 | |
351 | /* Restart the PHY */ | |
352 | phy_start_aneg(phydev); | |
353 | ||
354 | return 0; | |
355 | } | |
356 | EXPORT_SYMBOL(phy_ethtool_ksettings_set); | |
357 | ||
5514174f | 358 | void phy_ethtool_ksettings_get(struct phy_device *phydev, |
359 | struct ethtool_link_ksettings *cmd) | |
2d55173e PR |
360 | { |
361 | ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, | |
362 | phydev->supported); | |
363 | ||
364 | ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, | |
365 | phydev->advertising); | |
366 | ||
367 | ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising, | |
368 | phydev->lp_advertising); | |
369 | ||
370 | cmd->base.speed = phydev->speed; | |
371 | cmd->base.duplex = phydev->duplex; | |
372 | if (phydev->interface == PHY_INTERFACE_MODE_MOCA) | |
373 | cmd->base.port = PORT_BNC; | |
374 | else | |
375 | cmd->base.port = PORT_MII; | |
ceb62813 FF |
376 | cmd->base.transceiver = phy_is_internal(phydev) ? |
377 | XCVR_INTERNAL : XCVR_EXTERNAL; | |
2d55173e PR |
378 | cmd->base.phy_address = phydev->mdio.addr; |
379 | cmd->base.autoneg = phydev->autoneg; | |
1004ee61 RL |
380 | cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl; |
381 | cmd->base.eth_tp_mdix = phydev->mdix; | |
2d55173e PR |
382 | } |
383 | EXPORT_SYMBOL(phy_ethtool_ksettings_get); | |
00db8189 | 384 | |
b3df0da8 RD |
385 | /** |
386 | * phy_mii_ioctl - generic PHY MII ioctl interface | |
387 | * @phydev: the phy_device struct | |
00c7d920 | 388 | * @ifr: &struct ifreq for socket ioctl's |
b3df0da8 RD |
389 | * @cmd: ioctl cmd to execute |
390 | * | |
391 | * Note that this function is currently incompatible with the | |
00db8189 | 392 | * PHYCONTROL layer. It changes registers without regard to |
b3df0da8 | 393 | * current state. Use at own risk. |
00db8189 | 394 | */ |
2f53e904 | 395 | int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd) |
00db8189 | 396 | { |
28b04113 | 397 | struct mii_ioctl_data *mii_data = if_mii(ifr); |
00db8189 | 398 | u16 val = mii_data->val_in; |
79ce0477 | 399 | bool change_autoneg = false; |
00db8189 AF |
400 | |
401 | switch (cmd) { | |
402 | case SIOCGMIIPHY: | |
e5a03bfd | 403 | mii_data->phy_id = phydev->mdio.addr; |
c6d6a511 LB |
404 | /* fall through */ |
405 | ||
00db8189 | 406 | case SIOCGMIIREG: |
e5a03bfd AL |
407 | mii_data->val_out = mdiobus_read(phydev->mdio.bus, |
408 | mii_data->phy_id, | |
af1dc13e | 409 | mii_data->reg_num); |
e62a768f | 410 | return 0; |
00db8189 AF |
411 | |
412 | case SIOCSMIIREG: | |
e5a03bfd | 413 | if (mii_data->phy_id == phydev->mdio.addr) { |
e109374f | 414 | switch (mii_data->reg_num) { |
00db8189 | 415 | case MII_BMCR: |
79ce0477 BH |
416 | if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) { |
417 | if (phydev->autoneg == AUTONEG_ENABLE) | |
418 | change_autoneg = true; | |
00db8189 | 419 | phydev->autoneg = AUTONEG_DISABLE; |
79ce0477 BH |
420 | if (val & BMCR_FULLDPLX) |
421 | phydev->duplex = DUPLEX_FULL; | |
422 | else | |
423 | phydev->duplex = DUPLEX_HALF; | |
424 | if (val & BMCR_SPEED1000) | |
425 | phydev->speed = SPEED_1000; | |
426 | else if (val & BMCR_SPEED100) | |
427 | phydev->speed = SPEED_100; | |
428 | else phydev->speed = SPEED_10; | |
429 | } | |
430 | else { | |
431 | if (phydev->autoneg == AUTONEG_DISABLE) | |
432 | change_autoneg = true; | |
00db8189 | 433 | phydev->autoneg = AUTONEG_ENABLE; |
79ce0477 | 434 | } |
00db8189 AF |
435 | break; |
436 | case MII_ADVERTISE: | |
79ce0477 BH |
437 | phydev->advertising = mii_adv_to_ethtool_adv_t(val); |
438 | change_autoneg = true; | |
00db8189 AF |
439 | break; |
440 | default: | |
441 | /* do nothing */ | |
442 | break; | |
443 | } | |
444 | } | |
445 | ||
e5a03bfd | 446 | mdiobus_write(phydev->mdio.bus, mii_data->phy_id, |
af1dc13e PK |
447 | mii_data->reg_num, val); |
448 | ||
e5a03bfd | 449 | if (mii_data->phy_id == phydev->mdio.addr && |
cf18b778 | 450 | mii_data->reg_num == MII_BMCR && |
2613f95f | 451 | val & BMCR_RESET) |
e62a768f | 452 | return phy_init_hw(phydev); |
79ce0477 BH |
453 | |
454 | if (change_autoneg) | |
455 | return phy_start_aneg(phydev); | |
456 | ||
e62a768f | 457 | return 0; |
dda93b48 | 458 | |
c1f19b51 | 459 | case SIOCSHWTSTAMP: |
25149ef9 | 460 | if (phydev->drv && phydev->drv->hwtstamp) |
c1f19b51 RC |
461 | return phydev->drv->hwtstamp(phydev, ifr); |
462 | /* fall through */ | |
463 | ||
dda93b48 | 464 | default: |
c6d6a511 | 465 | return -EOPNOTSUPP; |
00db8189 | 466 | } |
00db8189 | 467 | } |
680e9fe9 | 468 | EXPORT_SYMBOL(phy_mii_ioctl); |
00db8189 | 469 | |
b3df0da8 | 470 | /** |
f555f34f | 471 | * phy_start_aneg_priv - start auto-negotiation for this PHY device |
b3df0da8 | 472 | * @phydev: the phy_device struct |
f555f34f | 473 | * @sync: indicate whether we should wait for the workqueue cancelation |
e1393456 | 474 | * |
b3df0da8 RD |
475 | * Description: Sanitizes the settings (if we're not autonegotiating |
476 | * them), and then calls the driver's config_aneg function. | |
477 | * If the PHYCONTROL Layer is operating, we change the state to | |
478 | * reflect the beginning of Auto-negotiation or forcing. | |
e1393456 | 479 | */ |
f555f34f | 480 | static int phy_start_aneg_priv(struct phy_device *phydev, bool sync) |
e1393456 | 481 | { |
f555f34f | 482 | bool trigger = 0; |
e1393456 AF |
483 | int err; |
484 | ||
25149ef9 FF |
485 | if (!phydev->drv) |
486 | return -EIO; | |
487 | ||
35b5f6b1 | 488 | mutex_lock(&phydev->lock); |
e1393456 AF |
489 | |
490 | if (AUTONEG_DISABLE == phydev->autoneg) | |
491 | phy_sanitize_settings(phydev); | |
492 | ||
9b3320ef BH |
493 | /* Invalidate LP advertising flags */ |
494 | phydev->lp_advertising = 0; | |
495 | ||
e1393456 | 496 | err = phydev->drv->config_aneg(phydev); |
e1393456 AF |
497 | if (err < 0) |
498 | goto out_unlock; | |
499 | ||
500 | if (phydev->state != PHY_HALTED) { | |
501 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
502 | phydev->state = PHY_AN; | |
503 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
504 | } else { | |
505 | phydev->state = PHY_FORCING; | |
506 | phydev->link_timeout = PHY_FORCE_TIMEOUT; | |
507 | } | |
508 | } | |
509 | ||
f555f34f AK |
510 | /* Re-schedule a PHY state machine to check PHY status because |
511 | * negotiation may already be done and aneg interrupt may not be | |
512 | * generated. | |
513 | */ | |
380fc14b | 514 | if (phydev->irq != PHY_POLL && phydev->state == PHY_AN) { |
f555f34f AK |
515 | err = phy_aneg_done(phydev); |
516 | if (err > 0) { | |
517 | trigger = true; | |
518 | err = 0; | |
519 | } | |
520 | } | |
521 | ||
e1393456 | 522 | out_unlock: |
35b5f6b1 | 523 | mutex_unlock(&phydev->lock); |
f555f34f AK |
524 | |
525 | if (trigger) | |
526 | phy_trigger_machine(phydev, sync); | |
527 | ||
e1393456 AF |
528 | return err; |
529 | } | |
f555f34f AK |
530 | |
531 | /** | |
532 | * phy_start_aneg - start auto-negotiation for this PHY device | |
533 | * @phydev: the phy_device struct | |
534 | * | |
535 | * Description: Sanitizes the settings (if we're not autonegotiating | |
536 | * them), and then calls the driver's config_aneg function. | |
537 | * If the PHYCONTROL Layer is operating, we change the state to | |
538 | * reflect the beginning of Auto-negotiation or forcing. | |
539 | */ | |
540 | int phy_start_aneg(struct phy_device *phydev) | |
541 | { | |
542 | return phy_start_aneg_priv(phydev, true); | |
543 | } | |
e1393456 AF |
544 | EXPORT_SYMBOL(phy_start_aneg); |
545 | ||
b3df0da8 RD |
546 | /** |
547 | * phy_start_machine - start PHY state machine tracking | |
548 | * @phydev: the phy_device struct | |
00db8189 | 549 | * |
b3df0da8 | 550 | * Description: The PHY infrastructure can run a state machine |
00db8189 | 551 | * which tracks whether the PHY is starting up, negotiating, |
fb5e7606 FF |
552 | * etc. This function starts the delayed workqueue which tracks |
553 | * the state of the PHY. If you want to maintain your own state machine, | |
29935aeb | 554 | * do not call this function. |
b3df0da8 | 555 | */ |
29935aeb | 556 | void phy_start_machine(struct phy_device *phydev) |
00db8189 | 557 | { |
bbb47bde | 558 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ); |
00db8189 | 559 | } |
5e5758d9 | 560 | EXPORT_SYMBOL_GPL(phy_start_machine); |
00db8189 | 561 | |
3c293f4e AL |
562 | /** |
563 | * phy_trigger_machine - trigger the state machine to run | |
564 | * | |
565 | * @phydev: the phy_device struct | |
eab12771 | 566 | * @sync: indicate whether we should wait for the workqueue cancelation |
3c293f4e AL |
567 | * |
568 | * Description: There has been a change in state which requires that the | |
569 | * state machine runs. | |
570 | */ | |
571 | ||
f555f34f | 572 | void phy_trigger_machine(struct phy_device *phydev, bool sync) |
3c293f4e | 573 | { |
eab12771 FF |
574 | if (sync) |
575 | cancel_delayed_work_sync(&phydev->state_queue); | |
576 | else | |
577 | cancel_delayed_work(&phydev->state_queue); | |
3c293f4e AL |
578 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0); |
579 | } | |
580 | ||
b3df0da8 RD |
581 | /** |
582 | * phy_stop_machine - stop the PHY state machine tracking | |
583 | * @phydev: target phy_device struct | |
00db8189 | 584 | * |
fb5e7606 FF |
585 | * Description: Stops the state machine delayed workqueue, sets the |
586 | * state to UP (unless it wasn't up yet). This function must be | |
587 | * called BEFORE phy_detach. | |
00db8189 AF |
588 | */ |
589 | void phy_stop_machine(struct phy_device *phydev) | |
590 | { | |
a390d1f3 | 591 | cancel_delayed_work_sync(&phydev->state_queue); |
00db8189 | 592 | |
35b5f6b1 | 593 | mutex_lock(&phydev->lock); |
49d52e81 | 594 | if (phydev->state > PHY_UP && phydev->state != PHY_HALTED) |
00db8189 | 595 | phydev->state = PHY_UP; |
35b5f6b1 | 596 | mutex_unlock(&phydev->lock); |
00db8189 AF |
597 | } |
598 | ||
b3df0da8 RD |
599 | /** |
600 | * phy_error - enter HALTED state for this PHY device | |
601 | * @phydev: target phy_device struct | |
00db8189 AF |
602 | * |
603 | * Moves the PHY to the HALTED state in response to a read | |
604 | * or write error, and tells the controller the link is down. | |
605 | * Must not be called from interrupt context, or while the | |
606 | * phydev->lock is held. | |
607 | */ | |
9b9a8bfc | 608 | static void phy_error(struct phy_device *phydev) |
00db8189 | 609 | { |
35b5f6b1 | 610 | mutex_lock(&phydev->lock); |
00db8189 | 611 | phydev->state = PHY_HALTED; |
35b5f6b1 | 612 | mutex_unlock(&phydev->lock); |
3c293f4e | 613 | |
eab12771 | 614 | phy_trigger_machine(phydev, false); |
00db8189 AF |
615 | } |
616 | ||
a38187e9 BM |
617 | /** |
618 | * phy_disable_interrupts - Disable the PHY interrupts from the PHY side | |
619 | * @phydev: target phy_device struct | |
620 | */ | |
621 | static int phy_disable_interrupts(struct phy_device *phydev) | |
622 | { | |
623 | int err; | |
624 | ||
625 | /* Disable PHY interrupts */ | |
626 | err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); | |
627 | if (err) | |
628 | goto phy_err; | |
629 | ||
630 | /* Clear the interrupt */ | |
631 | err = phy_clear_interrupt(phydev); | |
632 | if (err) | |
633 | goto phy_err; | |
634 | ||
635 | return 0; | |
636 | ||
637 | phy_err: | |
638 | phy_error(phydev); | |
639 | ||
640 | return err; | |
641 | } | |
642 | ||
643 | /** | |
644 | * phy_change - Called by the phy_interrupt to handle PHY changes | |
645 | * @phydev: phy_device struct that interrupted | |
646 | */ | |
647 | static irqreturn_t phy_change(struct phy_device *phydev) | |
648 | { | |
649 | if (phy_interrupt_is_valid(phydev)) { | |
650 | if (phydev->drv->did_interrupt && | |
651 | !phydev->drv->did_interrupt(phydev)) | |
652 | return IRQ_NONE; | |
653 | ||
654 | if (phy_disable_interrupts(phydev)) | |
655 | goto phy_err; | |
656 | } | |
657 | ||
658 | mutex_lock(&phydev->lock); | |
659 | if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state)) | |
660 | phydev->state = PHY_CHANGELINK; | |
661 | mutex_unlock(&phydev->lock); | |
662 | ||
663 | if (phy_interrupt_is_valid(phydev)) { | |
664 | /* Reenable interrupts */ | |
665 | if (PHY_HALTED != phydev->state && | |
666 | phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED)) | |
667 | goto phy_err; | |
668 | } | |
669 | ||
670 | /* reschedule state queue work to run as soon as possible */ | |
671 | phy_trigger_machine(phydev, true); | |
672 | return IRQ_HANDLED; | |
673 | ||
674 | phy_err: | |
675 | phy_error(phydev); | |
676 | return IRQ_NONE; | |
677 | } | |
678 | ||
679 | /** | |
680 | * phy_change_work - Scheduled by the phy_mac_interrupt to handle PHY changes | |
681 | * @work: work_struct that describes the work to be done | |
682 | */ | |
683 | void phy_change_work(struct work_struct *work) | |
684 | { | |
685 | struct phy_device *phydev = | |
686 | container_of(work, struct phy_device, phy_queue); | |
687 | ||
688 | phy_change(phydev); | |
689 | } | |
690 | ||
b3df0da8 RD |
691 | /** |
692 | * phy_interrupt - PHY interrupt handler | |
693 | * @irq: interrupt line | |
694 | * @phy_dat: phy_device pointer | |
e1393456 | 695 | * |
b3df0da8 | 696 | * Description: When a PHY interrupt occurs, the handler disables |
664fcf12 | 697 | * interrupts, and uses phy_change to handle the interrupt. |
e1393456 | 698 | */ |
7d12e780 | 699 | static irqreturn_t phy_interrupt(int irq, void *phy_dat) |
e1393456 AF |
700 | { |
701 | struct phy_device *phydev = phy_dat; | |
702 | ||
3c3070d7 MR |
703 | if (PHY_HALTED == phydev->state) |
704 | return IRQ_NONE; /* It can't be ours. */ | |
705 | ||
a38187e9 | 706 | return phy_change(phydev); |
e1393456 AF |
707 | } |
708 | ||
b3df0da8 RD |
709 | /** |
710 | * phy_enable_interrupts - Enable the interrupts from the PHY side | |
711 | * @phydev: target phy_device struct | |
712 | */ | |
89ff05ec | 713 | static int phy_enable_interrupts(struct phy_device *phydev) |
00db8189 | 714 | { |
553fe92b | 715 | int err = phy_clear_interrupt(phydev); |
00db8189 | 716 | |
e1393456 AF |
717 | if (err < 0) |
718 | return err; | |
00db8189 | 719 | |
553fe92b | 720 | return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); |
00db8189 | 721 | } |
00db8189 | 722 | |
b3df0da8 RD |
723 | /** |
724 | * phy_start_interrupts - request and enable interrupts for a PHY device | |
725 | * @phydev: target phy_device struct | |
e1393456 | 726 | * |
b3df0da8 RD |
727 | * Description: Request the interrupt for the given PHY. |
728 | * If this fails, then we set irq to PHY_POLL. | |
e1393456 | 729 | * Otherwise, we enable the interrupts in the PHY. |
e1393456 | 730 | * This should only be called with a valid IRQ number. |
b3df0da8 | 731 | * Returns 0 on success or < 0 on error. |
e1393456 AF |
732 | */ |
733 | int phy_start_interrupts(struct phy_device *phydev) | |
734 | { | |
c974bdbc AL |
735 | if (request_threaded_irq(phydev->irq, NULL, phy_interrupt, |
736 | IRQF_ONESHOT | IRQF_SHARED, | |
ae0219cb | 737 | phydev_name(phydev), phydev) < 0) { |
8d242488 | 738 | pr_warn("%s: Can't get IRQ %d (PHY)\n", |
e5a03bfd | 739 | phydev->mdio.bus->name, phydev->irq); |
e1393456 AF |
740 | phydev->irq = PHY_POLL; |
741 | return 0; | |
742 | } | |
743 | ||
e62a768f | 744 | return phy_enable_interrupts(phydev); |
e1393456 AF |
745 | } |
746 | EXPORT_SYMBOL(phy_start_interrupts); | |
747 | ||
b3df0da8 RD |
748 | /** |
749 | * phy_stop_interrupts - disable interrupts from a PHY device | |
750 | * @phydev: target phy_device struct | |
751 | */ | |
e1393456 AF |
752 | int phy_stop_interrupts(struct phy_device *phydev) |
753 | { | |
553fe92b | 754 | int err = phy_disable_interrupts(phydev); |
e1393456 AF |
755 | |
756 | if (err) | |
757 | phy_error(phydev); | |
758 | ||
0ac49527 MR |
759 | free_irq(phydev->irq, phydev); |
760 | ||
e1393456 AF |
761 | return err; |
762 | } | |
763 | EXPORT_SYMBOL(phy_stop_interrupts); | |
764 | ||
b3df0da8 RD |
765 | /** |
766 | * phy_stop - Bring down the PHY link, and stop checking the status | |
767 | * @phydev: target phy_device struct | |
768 | */ | |
e1393456 AF |
769 | void phy_stop(struct phy_device *phydev) |
770 | { | |
35b5f6b1 | 771 | mutex_lock(&phydev->lock); |
e1393456 AF |
772 | |
773 | if (PHY_HALTED == phydev->state) | |
774 | goto out_unlock; | |
775 | ||
2c7b4921 | 776 | if (phy_interrupt_is_valid(phydev)) { |
e1393456 AF |
777 | /* Disable PHY Interrupts */ |
778 | phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); | |
e1393456 | 779 | |
3c3070d7 MR |
780 | /* Clear any pending interrupts */ |
781 | phy_clear_interrupt(phydev); | |
782 | } | |
e1393456 | 783 | |
6daf6531 MR |
784 | phydev->state = PHY_HALTED; |
785 | ||
e1393456 | 786 | out_unlock: |
35b5f6b1 | 787 | mutex_unlock(&phydev->lock); |
3c3070d7 | 788 | |
2f53e904 | 789 | /* Cannot call flush_scheduled_work() here as desired because |
3c3070d7 MR |
790 | * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change() |
791 | * will not reenable interrupts. | |
792 | */ | |
e1393456 | 793 | } |
2f53e904 | 794 | EXPORT_SYMBOL(phy_stop); |
e1393456 | 795 | |
b3df0da8 RD |
796 | /** |
797 | * phy_start - start or restart a PHY device | |
798 | * @phydev: target phy_device struct | |
e1393456 | 799 | * |
b3df0da8 | 800 | * Description: Indicates the attached device's readiness to |
e1393456 AF |
801 | * handle PHY-related work. Used during startup to start the |
802 | * PHY, and after a call to phy_stop() to resume operation. | |
803 | * Also used to indicate the MDIO bus has cleared an error | |
804 | * condition. | |
805 | */ | |
806 | void phy_start(struct phy_device *phydev) | |
807 | { | |
c15e10e7 TB |
808 | int err = 0; |
809 | ||
35b5f6b1 | 810 | mutex_lock(&phydev->lock); |
e1393456 AF |
811 | |
812 | switch (phydev->state) { | |
e109374f FF |
813 | case PHY_STARTING: |
814 | phydev->state = PHY_PENDING; | |
815 | break; | |
816 | case PHY_READY: | |
817 | phydev->state = PHY_UP; | |
818 | break; | |
819 | case PHY_HALTED: | |
f5e64032 | 820 | /* if phy was suspended, bring the physical link up again */ |
71dfc117 | 821 | __phy_resume(phydev); |
f5e64032 | 822 | |
c15e10e7 | 823 | /* make sure interrupts are re-enabled for the PHY */ |
d55a9e3e | 824 | if (phy_interrupt_is_valid(phydev)) { |
84a527a4 SX |
825 | err = phy_enable_interrupts(phydev); |
826 | if (err < 0) | |
827 | break; | |
828 | } | |
c15e10e7 | 829 | |
e109374f | 830 | phydev->state = PHY_RESUMING; |
c15e10e7 | 831 | break; |
e109374f FF |
832 | default: |
833 | break; | |
e1393456 | 834 | } |
35b5f6b1 | 835 | mutex_unlock(&phydev->lock); |
c15e10e7 | 836 | |
eab12771 | 837 | phy_trigger_machine(phydev, true); |
e1393456 | 838 | } |
e1393456 | 839 | EXPORT_SYMBOL(phy_start); |
67c4f3fa | 840 | |
a81497be | 841 | static void phy_link_up(struct phy_device *phydev) |
61a17965 | 842 | { |
a81497be RK |
843 | phydev->phy_link_change(phydev, true, true); |
844 | phy_led_trigger_change_speed(phydev); | |
845 | } | |
846 | ||
847 | static void phy_link_down(struct phy_device *phydev, bool do_carrier) | |
848 | { | |
849 | phydev->phy_link_change(phydev, false, do_carrier); | |
2e0bc452 | 850 | phy_led_trigger_change_speed(phydev); |
61a17965 ZB |
851 | } |
852 | ||
35b5f6b1 NC |
853 | /** |
854 | * phy_state_machine - Handle the state machine | |
855 | * @work: work_struct that describes the work to be done | |
35b5f6b1 | 856 | */ |
4f9c85a1 | 857 | void phy_state_machine(struct work_struct *work) |
00db8189 | 858 | { |
bf6aede7 | 859 | struct delayed_work *dwork = to_delayed_work(work); |
35b5f6b1 | 860 | struct phy_device *phydev = |
a390d1f3 | 861 | container_of(dwork, struct phy_device, state_queue); |
c15e10e7 | 862 | bool needs_aneg = false, do_suspend = false; |
3e2186e0 | 863 | enum phy_state old_state; |
00db8189 | 864 | int err = 0; |
11e122cb | 865 | int old_link; |
00db8189 | 866 | |
35b5f6b1 | 867 | mutex_lock(&phydev->lock); |
00db8189 | 868 | |
3e2186e0 FF |
869 | old_state = phydev->state; |
870 | ||
25149ef9 | 871 | if (phydev->drv && phydev->drv->link_change_notify) |
2b8f2a28 DM |
872 | phydev->drv->link_change_notify(phydev); |
873 | ||
e109374f FF |
874 | switch (phydev->state) { |
875 | case PHY_DOWN: | |
876 | case PHY_STARTING: | |
877 | case PHY_READY: | |
878 | case PHY_PENDING: | |
879 | break; | |
880 | case PHY_UP: | |
6e14a5ee | 881 | needs_aneg = true; |
00db8189 | 882 | |
e109374f FF |
883 | phydev->link_timeout = PHY_AN_TIMEOUT; |
884 | ||
885 | break; | |
886 | case PHY_AN: | |
887 | err = phy_read_status(phydev); | |
e109374f | 888 | if (err < 0) |
00db8189 | 889 | break; |
6b655529 | 890 | |
2f53e904 | 891 | /* If the link is down, give up on negotiation for now */ |
e109374f FF |
892 | if (!phydev->link) { |
893 | phydev->state = PHY_NOLINK; | |
a81497be | 894 | phy_link_down(phydev, true); |
e109374f FF |
895 | break; |
896 | } | |
6b655529 | 897 | |
2f53e904 | 898 | /* Check if negotiation is done. Break if there's an error */ |
e109374f FF |
899 | err = phy_aneg_done(phydev); |
900 | if (err < 0) | |
901 | break; | |
6b655529 | 902 | |
e109374f FF |
903 | /* If AN is done, we're running */ |
904 | if (err > 0) { | |
905 | phydev->state = PHY_RUNNING; | |
a81497be | 906 | phy_link_up(phydev); |
fa8cddaf | 907 | } else if (0 == phydev->link_timeout--) |
6e14a5ee | 908 | needs_aneg = true; |
e109374f FF |
909 | break; |
910 | case PHY_NOLINK: | |
321beec5 AL |
911 | if (phy_interrupt_is_valid(phydev)) |
912 | break; | |
913 | ||
e109374f | 914 | err = phy_read_status(phydev); |
e109374f | 915 | if (err) |
00db8189 | 916 | break; |
00db8189 | 917 | |
e109374f | 918 | if (phydev->link) { |
e46e08b8 BK |
919 | if (AUTONEG_ENABLE == phydev->autoneg) { |
920 | err = phy_aneg_done(phydev); | |
921 | if (err < 0) | |
922 | break; | |
923 | ||
924 | if (!err) { | |
925 | phydev->state = PHY_AN; | |
926 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
927 | break; | |
928 | } | |
929 | } | |
e109374f | 930 | phydev->state = PHY_RUNNING; |
a81497be | 931 | phy_link_up(phydev); |
e109374f FF |
932 | } |
933 | break; | |
934 | case PHY_FORCING: | |
935 | err = genphy_update_link(phydev); | |
e109374f | 936 | if (err) |
00db8189 | 937 | break; |
00db8189 | 938 | |
e109374f FF |
939 | if (phydev->link) { |
940 | phydev->state = PHY_RUNNING; | |
a81497be | 941 | phy_link_up(phydev); |
e109374f FF |
942 | } else { |
943 | if (0 == phydev->link_timeout--) | |
6e14a5ee | 944 | needs_aneg = true; |
a81497be | 945 | phy_link_down(phydev, false); |
e109374f | 946 | } |
e109374f FF |
947 | break; |
948 | case PHY_RUNNING: | |
d5c3d846 FF |
949 | /* Only register a CHANGE if we are polling and link changed |
950 | * since latest checking. | |
e109374f | 951 | */ |
d5c3d846 | 952 | if (phydev->irq == PHY_POLL) { |
11e122cb SX |
953 | old_link = phydev->link; |
954 | err = phy_read_status(phydev); | |
955 | if (err) | |
956 | break; | |
957 | ||
958 | if (old_link != phydev->link) | |
959 | phydev->state = PHY_CHANGELINK; | |
960 | } | |
811a9191 ZK |
961 | /* |
962 | * Failsafe: check that nobody set phydev->link=0 between two | |
963 | * poll cycles, otherwise we won't leave RUNNING state as long | |
964 | * as link remains down. | |
965 | */ | |
966 | if (!phydev->link && phydev->state == PHY_RUNNING) { | |
967 | phydev->state = PHY_CHANGELINK; | |
968 | phydev_err(phydev, "no link in PHY_RUNNING\n"); | |
969 | } | |
e109374f FF |
970 | break; |
971 | case PHY_CHANGELINK: | |
972 | err = phy_read_status(phydev); | |
e109374f | 973 | if (err) |
00db8189 | 974 | break; |
00db8189 | 975 | |
e109374f FF |
976 | if (phydev->link) { |
977 | phydev->state = PHY_RUNNING; | |
a81497be | 978 | phy_link_up(phydev); |
e109374f FF |
979 | } else { |
980 | phydev->state = PHY_NOLINK; | |
a81497be | 981 | phy_link_down(phydev, true); |
e109374f | 982 | } |
00db8189 | 983 | |
e109374f FF |
984 | if (phy_interrupt_is_valid(phydev)) |
985 | err = phy_config_interrupt(phydev, | |
2f53e904 | 986 | PHY_INTERRUPT_ENABLED); |
e109374f FF |
987 | break; |
988 | case PHY_HALTED: | |
989 | if (phydev->link) { | |
990 | phydev->link = 0; | |
a81497be | 991 | phy_link_down(phydev, true); |
6e14a5ee | 992 | do_suspend = true; |
e109374f FF |
993 | } |
994 | break; | |
995 | case PHY_RESUMING: | |
e109374f FF |
996 | if (AUTONEG_ENABLE == phydev->autoneg) { |
997 | err = phy_aneg_done(phydev); | |
998 | if (err < 0) | |
00db8189 AF |
999 | break; |
1000 | ||
e109374f | 1001 | /* err > 0 if AN is done. |
2f53e904 SS |
1002 | * Otherwise, it's 0, and we're still waiting for AN |
1003 | */ | |
e109374f | 1004 | if (err > 0) { |
42caa074 WF |
1005 | err = phy_read_status(phydev); |
1006 | if (err) | |
1007 | break; | |
1008 | ||
1009 | if (phydev->link) { | |
1010 | phydev->state = PHY_RUNNING; | |
a81497be | 1011 | phy_link_up(phydev); |
2f53e904 | 1012 | } else { |
42caa074 | 1013 | phydev->state = PHY_NOLINK; |
a81497be | 1014 | phy_link_down(phydev, false); |
2f53e904 | 1015 | } |
e109374f FF |
1016 | } else { |
1017 | phydev->state = PHY_AN; | |
1018 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
42caa074 | 1019 | } |
e109374f FF |
1020 | } else { |
1021 | err = phy_read_status(phydev); | |
1022 | if (err) | |
1023 | break; | |
1024 | ||
1025 | if (phydev->link) { | |
1026 | phydev->state = PHY_RUNNING; | |
a81497be | 1027 | phy_link_up(phydev); |
2f53e904 | 1028 | } else { |
e109374f | 1029 | phydev->state = PHY_NOLINK; |
a81497be | 1030 | phy_link_down(phydev, false); |
2f53e904 | 1031 | } |
e109374f FF |
1032 | } |
1033 | break; | |
00db8189 AF |
1034 | } |
1035 | ||
35b5f6b1 | 1036 | mutex_unlock(&phydev->lock); |
00db8189 AF |
1037 | |
1038 | if (needs_aneg) | |
f555f34f | 1039 | err = phy_start_aneg_priv(phydev, false); |
6e14a5ee | 1040 | else if (do_suspend) |
be9dad1f SH |
1041 | phy_suspend(phydev); |
1042 | ||
00db8189 AF |
1043 | if (err < 0) |
1044 | phy_error(phydev); | |
1045 | ||
6a95befc MG |
1046 | if (old_state != phydev->state) |
1047 | phydev_dbg(phydev, "PHY state change %s -> %s\n", | |
1048 | phy_state_to_str(old_state), | |
1049 | phy_state_to_str(phydev->state)); | |
3e2186e0 | 1050 | |
d5c3d846 FF |
1051 | /* Only re-schedule a PHY state machine change if we are polling the |
1052 | * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving | |
1053 | * between states from phy_mac_interrupt() | |
1054 | */ | |
1055 | if (phydev->irq == PHY_POLL) | |
1056 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, | |
1057 | PHY_STATE_TIME * HZ); | |
35b5f6b1 | 1058 | } |
a59a4d19 | 1059 | |
664fcf12 AL |
1060 | /** |
1061 | * phy_mac_interrupt - MAC says the link has changed | |
1062 | * @phydev: phy_device struct with changed link | |
1063 | * @new_link: Link is Up/Down. | |
1064 | * | |
1065 | * Description: The MAC layer is able indicate there has been a change | |
1066 | * in the PHY link status. Set the new link status, and trigger the | |
1067 | * state machine, work a work queue. | |
1068 | */ | |
5ea94e76 FF |
1069 | void phy_mac_interrupt(struct phy_device *phydev, int new_link) |
1070 | { | |
5ea94e76 | 1071 | phydev->link = new_link; |
deccd16f FF |
1072 | |
1073 | /* Trigger a state machine change */ | |
1074 | queue_work(system_power_efficient_wq, &phydev->phy_queue); | |
5ea94e76 FF |
1075 | } |
1076 | EXPORT_SYMBOL(phy_mac_interrupt); | |
1077 | ||
a59a4d19 GC |
1078 | /** |
1079 | * phy_init_eee - init and check the EEE feature | |
1080 | * @phydev: target phy_device struct | |
1081 | * @clk_stop_enable: PHY may stop the clock during LPI | |
1082 | * | |
1083 | * Description: it checks if the Energy-Efficient Ethernet (EEE) | |
1084 | * is supported by looking at the MMD registers 3.20 and 7.60/61 | |
1085 | * and it programs the MMD register 3.0 setting the "Clock stop enable" | |
1086 | * bit if required. | |
1087 | */ | |
1088 | int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable) | |
1089 | { | |
25149ef9 FF |
1090 | if (!phydev->drv) |
1091 | return -EIO; | |
1092 | ||
a59a4d19 | 1093 | /* According to 802.3az,the EEE is supported only in full duplex-mode. |
a59a4d19 | 1094 | */ |
32d75141 | 1095 | if (phydev->duplex == DUPLEX_FULL) { |
a59a4d19 GC |
1096 | int eee_lp, eee_cap, eee_adv; |
1097 | u32 lp, cap, adv; | |
4ae6e50c | 1098 | int status; |
a59a4d19 GC |
1099 | |
1100 | /* Read phy status to properly get the right settings */ | |
1101 | status = phy_read_status(phydev); | |
1102 | if (status) | |
1103 | return status; | |
1104 | ||
1105 | /* First check if the EEE ability is supported */ | |
a6d99fcd | 1106 | eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); |
7a4cecf7 GC |
1107 | if (eee_cap <= 0) |
1108 | goto eee_exit_err; | |
a59a4d19 | 1109 | |
b32607dd | 1110 | cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap); |
a59a4d19 | 1111 | if (!cap) |
7a4cecf7 | 1112 | goto eee_exit_err; |
a59a4d19 GC |
1113 | |
1114 | /* Check which link settings negotiated and verify it in | |
1115 | * the EEE advertising registers. | |
1116 | */ | |
a6d99fcd | 1117 | eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE); |
7a4cecf7 GC |
1118 | if (eee_lp <= 0) |
1119 | goto eee_exit_err; | |
a59a4d19 | 1120 | |
a6d99fcd | 1121 | eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); |
7a4cecf7 GC |
1122 | if (eee_adv <= 0) |
1123 | goto eee_exit_err; | |
a59a4d19 | 1124 | |
b32607dd AB |
1125 | adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv); |
1126 | lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp); | |
54da5a8b | 1127 | if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv)) |
7a4cecf7 | 1128 | goto eee_exit_err; |
a59a4d19 GC |
1129 | |
1130 | if (clk_stop_enable) { | |
1131 | /* Configure the PHY to stop receiving xMII | |
1132 | * clock while it is signaling LPI. | |
1133 | */ | |
a6d99fcd | 1134 | int val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1); |
a59a4d19 GC |
1135 | if (val < 0) |
1136 | return val; | |
1137 | ||
1138 | val |= MDIO_PCS_CTRL1_CLKSTOP_EN; | |
a6d99fcd | 1139 | phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, val); |
a59a4d19 GC |
1140 | } |
1141 | ||
e62a768f | 1142 | return 0; /* EEE supported */ |
a59a4d19 | 1143 | } |
7a4cecf7 | 1144 | eee_exit_err: |
e62a768f | 1145 | return -EPROTONOSUPPORT; |
a59a4d19 GC |
1146 | } |
1147 | EXPORT_SYMBOL(phy_init_eee); | |
1148 | ||
1149 | /** | |
1150 | * phy_get_eee_err - report the EEE wake error count | |
1151 | * @phydev: target phy_device struct | |
1152 | * | |
1153 | * Description: it is to report the number of time where the PHY | |
1154 | * failed to complete its normal wake sequence. | |
1155 | */ | |
1156 | int phy_get_eee_err(struct phy_device *phydev) | |
1157 | { | |
25149ef9 FF |
1158 | if (!phydev->drv) |
1159 | return -EIO; | |
1160 | ||
a6d99fcd | 1161 | return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR); |
a59a4d19 GC |
1162 | } |
1163 | EXPORT_SYMBOL(phy_get_eee_err); | |
1164 | ||
1165 | /** | |
1166 | * phy_ethtool_get_eee - get EEE supported and status | |
1167 | * @phydev: target phy_device struct | |
1168 | * @data: ethtool_eee data | |
1169 | * | |
1170 | * Description: it reportes the Supported/Advertisement/LP Advertisement | |
1171 | * capabilities. | |
1172 | */ | |
1173 | int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data) | |
1174 | { | |
1175 | int val; | |
1176 | ||
25149ef9 FF |
1177 | if (!phydev->drv) |
1178 | return -EIO; | |
1179 | ||
a59a4d19 | 1180 | /* Get Supported EEE */ |
a6d99fcd | 1181 | val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); |
a59a4d19 GC |
1182 | if (val < 0) |
1183 | return val; | |
b32607dd | 1184 | data->supported = mmd_eee_cap_to_ethtool_sup_t(val); |
a59a4d19 GC |
1185 | |
1186 | /* Get advertisement EEE */ | |
a6d99fcd | 1187 | val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); |
a59a4d19 GC |
1188 | if (val < 0) |
1189 | return val; | |
b32607dd | 1190 | data->advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
a59a4d19 GC |
1191 | |
1192 | /* Get LP advertisement EEE */ | |
a6d99fcd | 1193 | val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE); |
a59a4d19 GC |
1194 | if (val < 0) |
1195 | return val; | |
b32607dd | 1196 | data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
a59a4d19 GC |
1197 | |
1198 | return 0; | |
1199 | } | |
1200 | EXPORT_SYMBOL(phy_ethtool_get_eee); | |
1201 | ||
1202 | /** | |
1203 | * phy_ethtool_set_eee - set EEE supported and status | |
1204 | * @phydev: target phy_device struct | |
1205 | * @data: ethtool_eee data | |
1206 | * | |
1207 | * Description: it is to program the Advertisement EEE register. | |
1208 | */ | |
1209 | int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) | |
1210 | { | |
f75abeb8 | 1211 | int cap, old_adv, adv, ret; |
a59a4d19 | 1212 | |
25149ef9 FF |
1213 | if (!phydev->drv) |
1214 | return -EIO; | |
1215 | ||
83ea067f RK |
1216 | /* Get Supported EEE */ |
1217 | cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); | |
1218 | if (cap < 0) | |
1219 | return cap; | |
d853d145 | 1220 | |
f75abeb8 RK |
1221 | old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); |
1222 | if (old_adv < 0) | |
1223 | return old_adv; | |
1224 | ||
83ea067f | 1225 | adv = ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap; |
a59a4d19 | 1226 | |
83ea067f RK |
1227 | /* Mask prohibited EEE modes */ |
1228 | adv &= ~phydev->eee_broken_modes; | |
1229 | ||
f75abeb8 RK |
1230 | if (old_adv != adv) { |
1231 | ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv); | |
1232 | if (ret < 0) | |
1233 | return ret; | |
1234 | ||
1235 | /* Restart autonegotiation so the new modes get sent to the | |
1236 | * link partner. | |
1237 | */ | |
002ba705 | 1238 | ret = phy_restart_aneg(phydev); |
f75abeb8 RK |
1239 | if (ret < 0) |
1240 | return ret; | |
1241 | } | |
1242 | ||
1243 | return 0; | |
a59a4d19 GC |
1244 | } |
1245 | EXPORT_SYMBOL(phy_ethtool_set_eee); | |
42e836eb MS |
1246 | |
1247 | int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) | |
1248 | { | |
25149ef9 | 1249 | if (phydev->drv && phydev->drv->set_wol) |
42e836eb MS |
1250 | return phydev->drv->set_wol(phydev, wol); |
1251 | ||
1252 | return -EOPNOTSUPP; | |
1253 | } | |
1254 | EXPORT_SYMBOL(phy_ethtool_set_wol); | |
1255 | ||
1256 | void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) | |
1257 | { | |
25149ef9 | 1258 | if (phydev->drv && phydev->drv->get_wol) |
42e836eb MS |
1259 | phydev->drv->get_wol(phydev, wol); |
1260 | } | |
1261 | EXPORT_SYMBOL(phy_ethtool_get_wol); | |
9d9a77ce PR |
1262 | |
1263 | int phy_ethtool_get_link_ksettings(struct net_device *ndev, | |
1264 | struct ethtool_link_ksettings *cmd) | |
1265 | { | |
1266 | struct phy_device *phydev = ndev->phydev; | |
1267 | ||
1268 | if (!phydev) | |
1269 | return -ENODEV; | |
1270 | ||
5514174f | 1271 | phy_ethtool_ksettings_get(phydev, cmd); |
1272 | ||
1273 | return 0; | |
9d9a77ce PR |
1274 | } |
1275 | EXPORT_SYMBOL(phy_ethtool_get_link_ksettings); | |
1276 | ||
1277 | int phy_ethtool_set_link_ksettings(struct net_device *ndev, | |
1278 | const struct ethtool_link_ksettings *cmd) | |
1279 | { | |
1280 | struct phy_device *phydev = ndev->phydev; | |
1281 | ||
1282 | if (!phydev) | |
1283 | return -ENODEV; | |
1284 | ||
1285 | return phy_ethtool_ksettings_set(phydev, cmd); | |
1286 | } | |
1287 | EXPORT_SYMBOL(phy_ethtool_set_link_ksettings); | |
e86a8987 FF |
1288 | |
1289 | int phy_ethtool_nway_reset(struct net_device *ndev) | |
1290 | { | |
1291 | struct phy_device *phydev = ndev->phydev; | |
1292 | ||
1293 | if (!phydev) | |
1294 | return -ENODEV; | |
1295 | ||
25149ef9 FF |
1296 | if (!phydev->drv) |
1297 | return -EIO; | |
1298 | ||
002ba705 | 1299 | return phy_restart_aneg(phydev); |
e86a8987 FF |
1300 | } |
1301 | EXPORT_SYMBOL(phy_ethtool_nway_reset); |