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Commit | Line | Data |
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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; | |
376 | ||
377 | cmd->base.phy_address = phydev->mdio.addr; | |
378 | cmd->base.autoneg = phydev->autoneg; | |
1004ee61 RL |
379 | cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl; |
380 | cmd->base.eth_tp_mdix = phydev->mdix; | |
2d55173e PR |
381 | } |
382 | EXPORT_SYMBOL(phy_ethtool_ksettings_get); | |
00db8189 | 383 | |
b3df0da8 RD |
384 | /** |
385 | * phy_mii_ioctl - generic PHY MII ioctl interface | |
386 | * @phydev: the phy_device struct | |
00c7d920 | 387 | * @ifr: &struct ifreq for socket ioctl's |
b3df0da8 RD |
388 | * @cmd: ioctl cmd to execute |
389 | * | |
390 | * Note that this function is currently incompatible with the | |
00db8189 | 391 | * PHYCONTROL layer. It changes registers without regard to |
b3df0da8 | 392 | * current state. Use at own risk. |
00db8189 | 393 | */ |
2f53e904 | 394 | int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd) |
00db8189 | 395 | { |
28b04113 | 396 | struct mii_ioctl_data *mii_data = if_mii(ifr); |
00db8189 | 397 | u16 val = mii_data->val_in; |
79ce0477 | 398 | bool change_autoneg = false; |
00db8189 AF |
399 | |
400 | switch (cmd) { | |
401 | case SIOCGMIIPHY: | |
e5a03bfd | 402 | mii_data->phy_id = phydev->mdio.addr; |
c6d6a511 LB |
403 | /* fall through */ |
404 | ||
00db8189 | 405 | case SIOCGMIIREG: |
e5a03bfd AL |
406 | mii_data->val_out = mdiobus_read(phydev->mdio.bus, |
407 | mii_data->phy_id, | |
af1dc13e | 408 | mii_data->reg_num); |
e62a768f | 409 | return 0; |
00db8189 AF |
410 | |
411 | case SIOCSMIIREG: | |
e5a03bfd | 412 | if (mii_data->phy_id == phydev->mdio.addr) { |
e109374f | 413 | switch (mii_data->reg_num) { |
00db8189 | 414 | case MII_BMCR: |
79ce0477 BH |
415 | if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) { |
416 | if (phydev->autoneg == AUTONEG_ENABLE) | |
417 | change_autoneg = true; | |
00db8189 | 418 | phydev->autoneg = AUTONEG_DISABLE; |
79ce0477 BH |
419 | if (val & BMCR_FULLDPLX) |
420 | phydev->duplex = DUPLEX_FULL; | |
421 | else | |
422 | phydev->duplex = DUPLEX_HALF; | |
423 | if (val & BMCR_SPEED1000) | |
424 | phydev->speed = SPEED_1000; | |
425 | else if (val & BMCR_SPEED100) | |
426 | phydev->speed = SPEED_100; | |
427 | else phydev->speed = SPEED_10; | |
428 | } | |
429 | else { | |
430 | if (phydev->autoneg == AUTONEG_DISABLE) | |
431 | change_autoneg = true; | |
00db8189 | 432 | phydev->autoneg = AUTONEG_ENABLE; |
79ce0477 | 433 | } |
00db8189 AF |
434 | break; |
435 | case MII_ADVERTISE: | |
79ce0477 BH |
436 | phydev->advertising = mii_adv_to_ethtool_adv_t(val); |
437 | change_autoneg = true; | |
00db8189 AF |
438 | break; |
439 | default: | |
440 | /* do nothing */ | |
441 | break; | |
442 | } | |
443 | } | |
444 | ||
e5a03bfd | 445 | mdiobus_write(phydev->mdio.bus, mii_data->phy_id, |
af1dc13e PK |
446 | mii_data->reg_num, val); |
447 | ||
e5a03bfd | 448 | if (mii_data->phy_id == phydev->mdio.addr && |
cf18b778 | 449 | mii_data->reg_num == MII_BMCR && |
2613f95f | 450 | val & BMCR_RESET) |
e62a768f | 451 | return phy_init_hw(phydev); |
79ce0477 BH |
452 | |
453 | if (change_autoneg) | |
454 | return phy_start_aneg(phydev); | |
455 | ||
e62a768f | 456 | return 0; |
dda93b48 | 457 | |
c1f19b51 | 458 | case SIOCSHWTSTAMP: |
25149ef9 | 459 | if (phydev->drv && phydev->drv->hwtstamp) |
c1f19b51 RC |
460 | return phydev->drv->hwtstamp(phydev, ifr); |
461 | /* fall through */ | |
462 | ||
dda93b48 | 463 | default: |
c6d6a511 | 464 | return -EOPNOTSUPP; |
00db8189 | 465 | } |
00db8189 | 466 | } |
680e9fe9 | 467 | EXPORT_SYMBOL(phy_mii_ioctl); |
00db8189 | 468 | |
b3df0da8 | 469 | /** |
f555f34f | 470 | * phy_start_aneg_priv - start auto-negotiation for this PHY device |
b3df0da8 | 471 | * @phydev: the phy_device struct |
f555f34f | 472 | * @sync: indicate whether we should wait for the workqueue cancelation |
e1393456 | 473 | * |
b3df0da8 RD |
474 | * Description: Sanitizes the settings (if we're not autonegotiating |
475 | * them), and then calls the driver's config_aneg function. | |
476 | * If the PHYCONTROL Layer is operating, we change the state to | |
477 | * reflect the beginning of Auto-negotiation or forcing. | |
e1393456 | 478 | */ |
f555f34f | 479 | static int phy_start_aneg_priv(struct phy_device *phydev, bool sync) |
e1393456 | 480 | { |
f555f34f | 481 | bool trigger = 0; |
e1393456 AF |
482 | int err; |
483 | ||
25149ef9 FF |
484 | if (!phydev->drv) |
485 | return -EIO; | |
486 | ||
35b5f6b1 | 487 | mutex_lock(&phydev->lock); |
e1393456 AF |
488 | |
489 | if (AUTONEG_DISABLE == phydev->autoneg) | |
490 | phy_sanitize_settings(phydev); | |
491 | ||
9b3320ef BH |
492 | /* Invalidate LP advertising flags */ |
493 | phydev->lp_advertising = 0; | |
494 | ||
e1393456 | 495 | err = phydev->drv->config_aneg(phydev); |
e1393456 AF |
496 | if (err < 0) |
497 | goto out_unlock; | |
498 | ||
499 | if (phydev->state != PHY_HALTED) { | |
500 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
501 | phydev->state = PHY_AN; | |
502 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
503 | } else { | |
504 | phydev->state = PHY_FORCING; | |
505 | phydev->link_timeout = PHY_FORCE_TIMEOUT; | |
506 | } | |
507 | } | |
508 | ||
f555f34f AK |
509 | /* Re-schedule a PHY state machine to check PHY status because |
510 | * negotiation may already be done and aneg interrupt may not be | |
511 | * generated. | |
512 | */ | |
513 | if (phy_interrupt_is_valid(phydev) && (phydev->state == PHY_AN)) { | |
514 | err = phy_aneg_done(phydev); | |
515 | if (err > 0) { | |
516 | trigger = true; | |
517 | err = 0; | |
518 | } | |
519 | } | |
520 | ||
e1393456 | 521 | out_unlock: |
35b5f6b1 | 522 | mutex_unlock(&phydev->lock); |
f555f34f AK |
523 | |
524 | if (trigger) | |
525 | phy_trigger_machine(phydev, sync); | |
526 | ||
e1393456 AF |
527 | return err; |
528 | } | |
f555f34f AK |
529 | |
530 | /** | |
531 | * phy_start_aneg - start auto-negotiation for this PHY device | |
532 | * @phydev: the phy_device struct | |
533 | * | |
534 | * Description: Sanitizes the settings (if we're not autonegotiating | |
535 | * them), and then calls the driver's config_aneg function. | |
536 | * If the PHYCONTROL Layer is operating, we change the state to | |
537 | * reflect the beginning of Auto-negotiation or forcing. | |
538 | */ | |
539 | int phy_start_aneg(struct phy_device *phydev) | |
540 | { | |
541 | return phy_start_aneg_priv(phydev, true); | |
542 | } | |
e1393456 AF |
543 | EXPORT_SYMBOL(phy_start_aneg); |
544 | ||
b3df0da8 RD |
545 | /** |
546 | * phy_start_machine - start PHY state machine tracking | |
547 | * @phydev: the phy_device struct | |
00db8189 | 548 | * |
b3df0da8 | 549 | * Description: The PHY infrastructure can run a state machine |
00db8189 | 550 | * which tracks whether the PHY is starting up, negotiating, |
fb5e7606 FF |
551 | * etc. This function starts the delayed workqueue which tracks |
552 | * the state of the PHY. If you want to maintain your own state machine, | |
29935aeb | 553 | * do not call this function. |
b3df0da8 | 554 | */ |
29935aeb | 555 | void phy_start_machine(struct phy_device *phydev) |
00db8189 | 556 | { |
bbb47bde | 557 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ); |
00db8189 AF |
558 | } |
559 | ||
3c293f4e AL |
560 | /** |
561 | * phy_trigger_machine - trigger the state machine to run | |
562 | * | |
563 | * @phydev: the phy_device struct | |
eab12771 | 564 | * @sync: indicate whether we should wait for the workqueue cancelation |
3c293f4e AL |
565 | * |
566 | * Description: There has been a change in state which requires that the | |
567 | * state machine runs. | |
568 | */ | |
569 | ||
f555f34f | 570 | void phy_trigger_machine(struct phy_device *phydev, bool sync) |
3c293f4e | 571 | { |
eab12771 FF |
572 | if (sync) |
573 | cancel_delayed_work_sync(&phydev->state_queue); | |
574 | else | |
575 | cancel_delayed_work(&phydev->state_queue); | |
3c293f4e AL |
576 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0); |
577 | } | |
578 | ||
b3df0da8 RD |
579 | /** |
580 | * phy_stop_machine - stop the PHY state machine tracking | |
581 | * @phydev: target phy_device struct | |
00db8189 | 582 | * |
fb5e7606 FF |
583 | * Description: Stops the state machine delayed workqueue, sets the |
584 | * state to UP (unless it wasn't up yet). This function must be | |
585 | * called BEFORE phy_detach. | |
00db8189 AF |
586 | */ |
587 | void phy_stop_machine(struct phy_device *phydev) | |
588 | { | |
a390d1f3 | 589 | cancel_delayed_work_sync(&phydev->state_queue); |
00db8189 | 590 | |
35b5f6b1 | 591 | mutex_lock(&phydev->lock); |
49d52e81 | 592 | if (phydev->state > PHY_UP && phydev->state != PHY_HALTED) |
00db8189 | 593 | phydev->state = PHY_UP; |
35b5f6b1 | 594 | mutex_unlock(&phydev->lock); |
7ad813f2 FF |
595 | |
596 | /* Now we can run the state machine synchronously */ | |
597 | phy_state_machine(&phydev->state_queue.work); | |
00db8189 AF |
598 | } |
599 | ||
b3df0da8 RD |
600 | /** |
601 | * phy_error - enter HALTED state for this PHY device | |
602 | * @phydev: target phy_device struct | |
00db8189 AF |
603 | * |
604 | * Moves the PHY to the HALTED state in response to a read | |
605 | * or write error, and tells the controller the link is down. | |
606 | * Must not be called from interrupt context, or while the | |
607 | * phydev->lock is held. | |
608 | */ | |
9b9a8bfc | 609 | static void phy_error(struct phy_device *phydev) |
00db8189 | 610 | { |
35b5f6b1 | 611 | mutex_lock(&phydev->lock); |
00db8189 | 612 | phydev->state = PHY_HALTED; |
35b5f6b1 | 613 | mutex_unlock(&phydev->lock); |
3c293f4e | 614 | |
eab12771 | 615 | phy_trigger_machine(phydev, false); |
00db8189 AF |
616 | } |
617 | ||
b3df0da8 RD |
618 | /** |
619 | * phy_interrupt - PHY interrupt handler | |
620 | * @irq: interrupt line | |
621 | * @phy_dat: phy_device pointer | |
e1393456 | 622 | * |
b3df0da8 | 623 | * Description: When a PHY interrupt occurs, the handler disables |
664fcf12 | 624 | * interrupts, and uses phy_change to handle the interrupt. |
e1393456 | 625 | */ |
7d12e780 | 626 | static irqreturn_t phy_interrupt(int irq, void *phy_dat) |
e1393456 AF |
627 | { |
628 | struct phy_device *phydev = phy_dat; | |
629 | ||
3c3070d7 MR |
630 | if (PHY_HALTED == phydev->state) |
631 | return IRQ_NONE; /* It can't be ours. */ | |
632 | ||
e1393456 | 633 | disable_irq_nosync(irq); |
0ac49527 | 634 | atomic_inc(&phydev->irq_disable); |
e1393456 | 635 | |
664fcf12 | 636 | phy_change(phydev); |
e1393456 AF |
637 | |
638 | return IRQ_HANDLED; | |
639 | } | |
640 | ||
b3df0da8 RD |
641 | /** |
642 | * phy_enable_interrupts - Enable the interrupts from the PHY side | |
643 | * @phydev: target phy_device struct | |
644 | */ | |
89ff05ec | 645 | static int phy_enable_interrupts(struct phy_device *phydev) |
00db8189 | 646 | { |
553fe92b | 647 | int err = phy_clear_interrupt(phydev); |
00db8189 | 648 | |
e1393456 AF |
649 | if (err < 0) |
650 | return err; | |
00db8189 | 651 | |
553fe92b | 652 | return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); |
00db8189 | 653 | } |
00db8189 | 654 | |
b3df0da8 RD |
655 | /** |
656 | * phy_disable_interrupts - Disable the PHY interrupts from the PHY side | |
657 | * @phydev: target phy_device struct | |
658 | */ | |
89ff05ec | 659 | static int phy_disable_interrupts(struct phy_device *phydev) |
00db8189 AF |
660 | { |
661 | int err; | |
662 | ||
663 | /* Disable PHY interrupts */ | |
664 | err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); | |
00db8189 AF |
665 | if (err) |
666 | goto phy_err; | |
667 | ||
668 | /* Clear the interrupt */ | |
669 | err = phy_clear_interrupt(phydev); | |
00db8189 AF |
670 | if (err) |
671 | goto phy_err; | |
672 | ||
673 | return 0; | |
674 | ||
675 | phy_err: | |
676 | phy_error(phydev); | |
677 | ||
678 | return err; | |
679 | } | |
e1393456 | 680 | |
b3df0da8 RD |
681 | /** |
682 | * phy_start_interrupts - request and enable interrupts for a PHY device | |
683 | * @phydev: target phy_device struct | |
e1393456 | 684 | * |
b3df0da8 RD |
685 | * Description: Request the interrupt for the given PHY. |
686 | * If this fails, then we set irq to PHY_POLL. | |
e1393456 | 687 | * Otherwise, we enable the interrupts in the PHY. |
e1393456 | 688 | * This should only be called with a valid IRQ number. |
b3df0da8 | 689 | * Returns 0 on success or < 0 on error. |
e1393456 AF |
690 | */ |
691 | int phy_start_interrupts(struct phy_device *phydev) | |
692 | { | |
0ac49527 | 693 | atomic_set(&phydev->irq_disable, 0); |
c974bdbc AL |
694 | if (request_threaded_irq(phydev->irq, NULL, phy_interrupt, |
695 | IRQF_ONESHOT | IRQF_SHARED, | |
ae0219cb | 696 | phydev_name(phydev), phydev) < 0) { |
8d242488 | 697 | pr_warn("%s: Can't get IRQ %d (PHY)\n", |
e5a03bfd | 698 | phydev->mdio.bus->name, phydev->irq); |
e1393456 AF |
699 | phydev->irq = PHY_POLL; |
700 | return 0; | |
701 | } | |
702 | ||
e62a768f | 703 | return phy_enable_interrupts(phydev); |
e1393456 AF |
704 | } |
705 | EXPORT_SYMBOL(phy_start_interrupts); | |
706 | ||
b3df0da8 RD |
707 | /** |
708 | * phy_stop_interrupts - disable interrupts from a PHY device | |
709 | * @phydev: target phy_device struct | |
710 | */ | |
e1393456 AF |
711 | int phy_stop_interrupts(struct phy_device *phydev) |
712 | { | |
553fe92b | 713 | int err = phy_disable_interrupts(phydev); |
e1393456 AF |
714 | |
715 | if (err) | |
716 | phy_error(phydev); | |
717 | ||
0ac49527 MR |
718 | free_irq(phydev->irq, phydev); |
719 | ||
2f53e904 | 720 | /* If work indeed has been cancelled, disable_irq() will have |
0ac49527 MR |
721 | * been left unbalanced from phy_interrupt() and enable_irq() |
722 | * has to be called so that other devices on the line work. | |
723 | */ | |
724 | while (atomic_dec_return(&phydev->irq_disable) >= 0) | |
725 | enable_irq(phydev->irq); | |
e1393456 AF |
726 | |
727 | return err; | |
728 | } | |
729 | EXPORT_SYMBOL(phy_stop_interrupts); | |
730 | ||
b3df0da8 | 731 | /** |
664fcf12 AL |
732 | * phy_change - Called by the phy_interrupt to handle PHY changes |
733 | * @phydev: phy_device struct that interrupted | |
b3df0da8 | 734 | */ |
664fcf12 | 735 | void phy_change(struct phy_device *phydev) |
e1393456 | 736 | { |
deccd16f FF |
737 | if (phy_interrupt_is_valid(phydev)) { |
738 | if (phydev->drv->did_interrupt && | |
739 | !phydev->drv->did_interrupt(phydev)) | |
740 | goto ignore; | |
a8729eb3 | 741 | |
deccd16f FF |
742 | if (phy_disable_interrupts(phydev)) |
743 | goto phy_err; | |
744 | } | |
e1393456 | 745 | |
35b5f6b1 | 746 | mutex_lock(&phydev->lock); |
e1393456 AF |
747 | if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state)) |
748 | phydev->state = PHY_CHANGELINK; | |
35b5f6b1 | 749 | mutex_unlock(&phydev->lock); |
e1393456 | 750 | |
deccd16f FF |
751 | if (phy_interrupt_is_valid(phydev)) { |
752 | atomic_dec(&phydev->irq_disable); | |
753 | enable_irq(phydev->irq); | |
e1393456 | 754 | |
deccd16f FF |
755 | /* Reenable interrupts */ |
756 | if (PHY_HALTED != phydev->state && | |
757 | phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED)) | |
758 | goto irq_enable_err; | |
759 | } | |
e1393456 | 760 | |
a390d1f3 | 761 | /* reschedule state queue work to run as soon as possible */ |
eab12771 | 762 | phy_trigger_machine(phydev, true); |
e1393456 AF |
763 | return; |
764 | ||
a8729eb3 AG |
765 | ignore: |
766 | atomic_dec(&phydev->irq_disable); | |
767 | enable_irq(phydev->irq); | |
768 | return; | |
769 | ||
e1393456 AF |
770 | irq_enable_err: |
771 | disable_irq(phydev->irq); | |
0ac49527 | 772 | atomic_inc(&phydev->irq_disable); |
e1393456 AF |
773 | phy_err: |
774 | phy_error(phydev); | |
775 | } | |
776 | ||
664fcf12 AL |
777 | /** |
778 | * phy_change_work - Scheduled by the phy_mac_interrupt to handle PHY changes | |
779 | * @work: work_struct that describes the work to be done | |
780 | */ | |
781 | void phy_change_work(struct work_struct *work) | |
782 | { | |
783 | struct phy_device *phydev = | |
784 | container_of(work, struct phy_device, phy_queue); | |
785 | ||
786 | phy_change(phydev); | |
787 | } | |
788 | ||
b3df0da8 RD |
789 | /** |
790 | * phy_stop - Bring down the PHY link, and stop checking the status | |
791 | * @phydev: target phy_device struct | |
792 | */ | |
e1393456 AF |
793 | void phy_stop(struct phy_device *phydev) |
794 | { | |
35b5f6b1 | 795 | mutex_lock(&phydev->lock); |
e1393456 AF |
796 | |
797 | if (PHY_HALTED == phydev->state) | |
798 | goto out_unlock; | |
799 | ||
2c7b4921 | 800 | if (phy_interrupt_is_valid(phydev)) { |
e1393456 AF |
801 | /* Disable PHY Interrupts */ |
802 | phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); | |
e1393456 | 803 | |
3c3070d7 MR |
804 | /* Clear any pending interrupts */ |
805 | phy_clear_interrupt(phydev); | |
806 | } | |
e1393456 | 807 | |
6daf6531 MR |
808 | phydev->state = PHY_HALTED; |
809 | ||
e1393456 | 810 | out_unlock: |
35b5f6b1 | 811 | mutex_unlock(&phydev->lock); |
3c3070d7 | 812 | |
2f53e904 | 813 | /* Cannot call flush_scheduled_work() here as desired because |
3c3070d7 MR |
814 | * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change() |
815 | * will not reenable interrupts. | |
816 | */ | |
e1393456 | 817 | } |
2f53e904 | 818 | EXPORT_SYMBOL(phy_stop); |
e1393456 | 819 | |
b3df0da8 RD |
820 | /** |
821 | * phy_start - start or restart a PHY device | |
822 | * @phydev: target phy_device struct | |
e1393456 | 823 | * |
b3df0da8 | 824 | * Description: Indicates the attached device's readiness to |
e1393456 AF |
825 | * handle PHY-related work. Used during startup to start the |
826 | * PHY, and after a call to phy_stop() to resume operation. | |
827 | * Also used to indicate the MDIO bus has cleared an error | |
828 | * condition. | |
829 | */ | |
830 | void phy_start(struct phy_device *phydev) | |
831 | { | |
c15e10e7 TB |
832 | bool do_resume = false; |
833 | int err = 0; | |
834 | ||
35b5f6b1 | 835 | mutex_lock(&phydev->lock); |
e1393456 AF |
836 | |
837 | switch (phydev->state) { | |
e109374f FF |
838 | case PHY_STARTING: |
839 | phydev->state = PHY_PENDING; | |
840 | break; | |
841 | case PHY_READY: | |
842 | phydev->state = PHY_UP; | |
843 | break; | |
844 | case PHY_HALTED: | |
c15e10e7 | 845 | /* make sure interrupts are re-enabled for the PHY */ |
84a527a4 SX |
846 | if (phydev->irq != PHY_POLL) { |
847 | err = phy_enable_interrupts(phydev); | |
848 | if (err < 0) | |
849 | break; | |
850 | } | |
c15e10e7 | 851 | |
e109374f | 852 | phydev->state = PHY_RESUMING; |
c15e10e7 TB |
853 | do_resume = true; |
854 | break; | |
e109374f FF |
855 | default: |
856 | break; | |
e1393456 | 857 | } |
35b5f6b1 | 858 | mutex_unlock(&phydev->lock); |
c15e10e7 TB |
859 | |
860 | /* if phy was suspended, bring the physical link up again */ | |
861 | if (do_resume) | |
862 | phy_resume(phydev); | |
3c293f4e | 863 | |
eab12771 | 864 | phy_trigger_machine(phydev, true); |
e1393456 | 865 | } |
e1393456 | 866 | EXPORT_SYMBOL(phy_start); |
67c4f3fa | 867 | |
61a17965 ZB |
868 | static void phy_adjust_link(struct phy_device *phydev) |
869 | { | |
870 | phydev->adjust_link(phydev->attached_dev); | |
2e0bc452 | 871 | phy_led_trigger_change_speed(phydev); |
61a17965 ZB |
872 | } |
873 | ||
35b5f6b1 NC |
874 | /** |
875 | * phy_state_machine - Handle the state machine | |
876 | * @work: work_struct that describes the work to be done | |
35b5f6b1 | 877 | */ |
4f9c85a1 | 878 | void phy_state_machine(struct work_struct *work) |
00db8189 | 879 | { |
bf6aede7 | 880 | struct delayed_work *dwork = to_delayed_work(work); |
35b5f6b1 | 881 | struct phy_device *phydev = |
a390d1f3 | 882 | container_of(dwork, struct phy_device, state_queue); |
c15e10e7 | 883 | bool needs_aneg = false, do_suspend = false; |
3e2186e0 | 884 | enum phy_state old_state; |
00db8189 | 885 | int err = 0; |
11e122cb | 886 | int old_link; |
00db8189 | 887 | |
35b5f6b1 | 888 | mutex_lock(&phydev->lock); |
00db8189 | 889 | |
3e2186e0 FF |
890 | old_state = phydev->state; |
891 | ||
25149ef9 | 892 | if (phydev->drv && phydev->drv->link_change_notify) |
2b8f2a28 DM |
893 | phydev->drv->link_change_notify(phydev); |
894 | ||
e109374f FF |
895 | switch (phydev->state) { |
896 | case PHY_DOWN: | |
897 | case PHY_STARTING: | |
898 | case PHY_READY: | |
899 | case PHY_PENDING: | |
900 | break; | |
901 | case PHY_UP: | |
6e14a5ee | 902 | needs_aneg = true; |
00db8189 | 903 | |
e109374f FF |
904 | phydev->link_timeout = PHY_AN_TIMEOUT; |
905 | ||
906 | break; | |
907 | case PHY_AN: | |
908 | err = phy_read_status(phydev); | |
e109374f | 909 | if (err < 0) |
00db8189 | 910 | break; |
6b655529 | 911 | |
2f53e904 | 912 | /* If the link is down, give up on negotiation for now */ |
e109374f FF |
913 | if (!phydev->link) { |
914 | phydev->state = PHY_NOLINK; | |
915 | netif_carrier_off(phydev->attached_dev); | |
61a17965 | 916 | phy_adjust_link(phydev); |
e109374f FF |
917 | break; |
918 | } | |
6b655529 | 919 | |
2f53e904 | 920 | /* Check if negotiation is done. Break if there's an error */ |
e109374f FF |
921 | err = phy_aneg_done(phydev); |
922 | if (err < 0) | |
923 | break; | |
6b655529 | 924 | |
e109374f FF |
925 | /* If AN is done, we're running */ |
926 | if (err > 0) { | |
927 | phydev->state = PHY_RUNNING; | |
928 | netif_carrier_on(phydev->attached_dev); | |
61a17965 | 929 | phy_adjust_link(phydev); |
00db8189 | 930 | |
fa8cddaf | 931 | } else if (0 == phydev->link_timeout--) |
6e14a5ee | 932 | needs_aneg = true; |
e109374f FF |
933 | break; |
934 | case PHY_NOLINK: | |
321beec5 AL |
935 | if (phy_interrupt_is_valid(phydev)) |
936 | break; | |
937 | ||
e109374f | 938 | err = phy_read_status(phydev); |
e109374f | 939 | if (err) |
00db8189 | 940 | break; |
00db8189 | 941 | |
e109374f | 942 | if (phydev->link) { |
e46e08b8 BK |
943 | if (AUTONEG_ENABLE == phydev->autoneg) { |
944 | err = phy_aneg_done(phydev); | |
945 | if (err < 0) | |
946 | break; | |
947 | ||
948 | if (!err) { | |
949 | phydev->state = PHY_AN; | |
950 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
951 | break; | |
952 | } | |
953 | } | |
e109374f FF |
954 | phydev->state = PHY_RUNNING; |
955 | netif_carrier_on(phydev->attached_dev); | |
61a17965 | 956 | phy_adjust_link(phydev); |
e109374f FF |
957 | } |
958 | break; | |
959 | case PHY_FORCING: | |
960 | err = genphy_update_link(phydev); | |
e109374f | 961 | if (err) |
00db8189 | 962 | break; |
00db8189 | 963 | |
e109374f FF |
964 | if (phydev->link) { |
965 | phydev->state = PHY_RUNNING; | |
966 | netif_carrier_on(phydev->attached_dev); | |
967 | } else { | |
968 | if (0 == phydev->link_timeout--) | |
6e14a5ee | 969 | needs_aneg = true; |
e109374f | 970 | } |
00db8189 | 971 | |
61a17965 | 972 | phy_adjust_link(phydev); |
e109374f FF |
973 | break; |
974 | case PHY_RUNNING: | |
d5c3d846 FF |
975 | /* Only register a CHANGE if we are polling and link changed |
976 | * since latest checking. | |
e109374f | 977 | */ |
d5c3d846 | 978 | if (phydev->irq == PHY_POLL) { |
11e122cb SX |
979 | old_link = phydev->link; |
980 | err = phy_read_status(phydev); | |
981 | if (err) | |
982 | break; | |
983 | ||
984 | if (old_link != phydev->link) | |
985 | phydev->state = PHY_CHANGELINK; | |
986 | } | |
811a9191 ZK |
987 | /* |
988 | * Failsafe: check that nobody set phydev->link=0 between two | |
989 | * poll cycles, otherwise we won't leave RUNNING state as long | |
990 | * as link remains down. | |
991 | */ | |
992 | if (!phydev->link && phydev->state == PHY_RUNNING) { | |
993 | phydev->state = PHY_CHANGELINK; | |
994 | phydev_err(phydev, "no link in PHY_RUNNING\n"); | |
995 | } | |
e109374f FF |
996 | break; |
997 | case PHY_CHANGELINK: | |
998 | err = phy_read_status(phydev); | |
e109374f | 999 | if (err) |
00db8189 | 1000 | break; |
00db8189 | 1001 | |
e109374f FF |
1002 | if (phydev->link) { |
1003 | phydev->state = PHY_RUNNING; | |
1004 | netif_carrier_on(phydev->attached_dev); | |
1005 | } else { | |
1006 | phydev->state = PHY_NOLINK; | |
1007 | netif_carrier_off(phydev->attached_dev); | |
1008 | } | |
00db8189 | 1009 | |
61a17965 | 1010 | phy_adjust_link(phydev); |
00db8189 | 1011 | |
e109374f FF |
1012 | if (phy_interrupt_is_valid(phydev)) |
1013 | err = phy_config_interrupt(phydev, | |
2f53e904 | 1014 | PHY_INTERRUPT_ENABLED); |
e109374f FF |
1015 | break; |
1016 | case PHY_HALTED: | |
1017 | if (phydev->link) { | |
1018 | phydev->link = 0; | |
1019 | netif_carrier_off(phydev->attached_dev); | |
61a17965 | 1020 | phy_adjust_link(phydev); |
6e14a5ee | 1021 | do_suspend = true; |
e109374f FF |
1022 | } |
1023 | break; | |
1024 | case PHY_RESUMING: | |
e109374f FF |
1025 | if (AUTONEG_ENABLE == phydev->autoneg) { |
1026 | err = phy_aneg_done(phydev); | |
1027 | if (err < 0) | |
00db8189 AF |
1028 | break; |
1029 | ||
e109374f | 1030 | /* err > 0 if AN is done. |
2f53e904 SS |
1031 | * Otherwise, it's 0, and we're still waiting for AN |
1032 | */ | |
e109374f | 1033 | if (err > 0) { |
42caa074 WF |
1034 | err = phy_read_status(phydev); |
1035 | if (err) | |
1036 | break; | |
1037 | ||
1038 | if (phydev->link) { | |
1039 | phydev->state = PHY_RUNNING; | |
1040 | netif_carrier_on(phydev->attached_dev); | |
2f53e904 | 1041 | } else { |
42caa074 | 1042 | phydev->state = PHY_NOLINK; |
2f53e904 | 1043 | } |
61a17965 | 1044 | phy_adjust_link(phydev); |
e109374f FF |
1045 | } else { |
1046 | phydev->state = PHY_AN; | |
1047 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
42caa074 | 1048 | } |
e109374f FF |
1049 | } else { |
1050 | err = phy_read_status(phydev); | |
1051 | if (err) | |
1052 | break; | |
1053 | ||
1054 | if (phydev->link) { | |
1055 | phydev->state = PHY_RUNNING; | |
1056 | netif_carrier_on(phydev->attached_dev); | |
2f53e904 | 1057 | } else { |
e109374f | 1058 | phydev->state = PHY_NOLINK; |
2f53e904 | 1059 | } |
61a17965 | 1060 | phy_adjust_link(phydev); |
e109374f FF |
1061 | } |
1062 | break; | |
00db8189 AF |
1063 | } |
1064 | ||
35b5f6b1 | 1065 | mutex_unlock(&phydev->lock); |
00db8189 AF |
1066 | |
1067 | if (needs_aneg) | |
f555f34f | 1068 | err = phy_start_aneg_priv(phydev, false); |
6e14a5ee | 1069 | else if (do_suspend) |
be9dad1f SH |
1070 | phy_suspend(phydev); |
1071 | ||
00db8189 AF |
1072 | if (err < 0) |
1073 | phy_error(phydev); | |
1074 | ||
6a95befc MG |
1075 | if (old_state != phydev->state) |
1076 | phydev_dbg(phydev, "PHY state change %s -> %s\n", | |
1077 | phy_state_to_str(old_state), | |
1078 | phy_state_to_str(phydev->state)); | |
3e2186e0 | 1079 | |
d5c3d846 FF |
1080 | /* Only re-schedule a PHY state machine change if we are polling the |
1081 | * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving | |
1082 | * between states from phy_mac_interrupt() | |
1083 | */ | |
1084 | if (phydev->irq == PHY_POLL) | |
1085 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, | |
1086 | PHY_STATE_TIME * HZ); | |
35b5f6b1 | 1087 | } |
a59a4d19 | 1088 | |
664fcf12 AL |
1089 | /** |
1090 | * phy_mac_interrupt - MAC says the link has changed | |
1091 | * @phydev: phy_device struct with changed link | |
1092 | * @new_link: Link is Up/Down. | |
1093 | * | |
1094 | * Description: The MAC layer is able indicate there has been a change | |
1095 | * in the PHY link status. Set the new link status, and trigger the | |
1096 | * state machine, work a work queue. | |
1097 | */ | |
5ea94e76 FF |
1098 | void phy_mac_interrupt(struct phy_device *phydev, int new_link) |
1099 | { | |
5ea94e76 | 1100 | phydev->link = new_link; |
deccd16f FF |
1101 | |
1102 | /* Trigger a state machine change */ | |
1103 | queue_work(system_power_efficient_wq, &phydev->phy_queue); | |
5ea94e76 FF |
1104 | } |
1105 | EXPORT_SYMBOL(phy_mac_interrupt); | |
1106 | ||
a59a4d19 GC |
1107 | /** |
1108 | * phy_init_eee - init and check the EEE feature | |
1109 | * @phydev: target phy_device struct | |
1110 | * @clk_stop_enable: PHY may stop the clock during LPI | |
1111 | * | |
1112 | * Description: it checks if the Energy-Efficient Ethernet (EEE) | |
1113 | * is supported by looking at the MMD registers 3.20 and 7.60/61 | |
1114 | * and it programs the MMD register 3.0 setting the "Clock stop enable" | |
1115 | * bit if required. | |
1116 | */ | |
1117 | int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable) | |
1118 | { | |
25149ef9 FF |
1119 | if (!phydev->drv) |
1120 | return -EIO; | |
1121 | ||
a59a4d19 | 1122 | /* According to 802.3az,the EEE is supported only in full duplex-mode. |
a59a4d19 | 1123 | */ |
32d75141 | 1124 | if (phydev->duplex == DUPLEX_FULL) { |
a59a4d19 GC |
1125 | int eee_lp, eee_cap, eee_adv; |
1126 | u32 lp, cap, adv; | |
4ae6e50c | 1127 | int status; |
a59a4d19 GC |
1128 | |
1129 | /* Read phy status to properly get the right settings */ | |
1130 | status = phy_read_status(phydev); | |
1131 | if (status) | |
1132 | return status; | |
1133 | ||
1134 | /* First check if the EEE ability is supported */ | |
a6d99fcd | 1135 | eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); |
7a4cecf7 GC |
1136 | if (eee_cap <= 0) |
1137 | goto eee_exit_err; | |
a59a4d19 | 1138 | |
b32607dd | 1139 | cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap); |
a59a4d19 | 1140 | if (!cap) |
7a4cecf7 | 1141 | goto eee_exit_err; |
a59a4d19 GC |
1142 | |
1143 | /* Check which link settings negotiated and verify it in | |
1144 | * the EEE advertising registers. | |
1145 | */ | |
a6d99fcd | 1146 | eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE); |
7a4cecf7 GC |
1147 | if (eee_lp <= 0) |
1148 | goto eee_exit_err; | |
a59a4d19 | 1149 | |
a6d99fcd | 1150 | eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); |
7a4cecf7 GC |
1151 | if (eee_adv <= 0) |
1152 | goto eee_exit_err; | |
a59a4d19 | 1153 | |
b32607dd AB |
1154 | adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv); |
1155 | lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp); | |
54da5a8b | 1156 | if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv)) |
7a4cecf7 | 1157 | goto eee_exit_err; |
a59a4d19 GC |
1158 | |
1159 | if (clk_stop_enable) { | |
1160 | /* Configure the PHY to stop receiving xMII | |
1161 | * clock while it is signaling LPI. | |
1162 | */ | |
a6d99fcd | 1163 | int val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1); |
a59a4d19 GC |
1164 | if (val < 0) |
1165 | return val; | |
1166 | ||
1167 | val |= MDIO_PCS_CTRL1_CLKSTOP_EN; | |
a6d99fcd | 1168 | phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, val); |
a59a4d19 GC |
1169 | } |
1170 | ||
e62a768f | 1171 | return 0; /* EEE supported */ |
a59a4d19 | 1172 | } |
7a4cecf7 | 1173 | eee_exit_err: |
e62a768f | 1174 | return -EPROTONOSUPPORT; |
a59a4d19 GC |
1175 | } |
1176 | EXPORT_SYMBOL(phy_init_eee); | |
1177 | ||
1178 | /** | |
1179 | * phy_get_eee_err - report the EEE wake error count | |
1180 | * @phydev: target phy_device struct | |
1181 | * | |
1182 | * Description: it is to report the number of time where the PHY | |
1183 | * failed to complete its normal wake sequence. | |
1184 | */ | |
1185 | int phy_get_eee_err(struct phy_device *phydev) | |
1186 | { | |
25149ef9 FF |
1187 | if (!phydev->drv) |
1188 | return -EIO; | |
1189 | ||
a6d99fcd | 1190 | return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR); |
a59a4d19 GC |
1191 | } |
1192 | EXPORT_SYMBOL(phy_get_eee_err); | |
1193 | ||
1194 | /** | |
1195 | * phy_ethtool_get_eee - get EEE supported and status | |
1196 | * @phydev: target phy_device struct | |
1197 | * @data: ethtool_eee data | |
1198 | * | |
1199 | * Description: it reportes the Supported/Advertisement/LP Advertisement | |
1200 | * capabilities. | |
1201 | */ | |
1202 | int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data) | |
1203 | { | |
1204 | int val; | |
1205 | ||
25149ef9 FF |
1206 | if (!phydev->drv) |
1207 | return -EIO; | |
1208 | ||
a59a4d19 | 1209 | /* Get Supported EEE */ |
a6d99fcd | 1210 | val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); |
a59a4d19 GC |
1211 | if (val < 0) |
1212 | return val; | |
b32607dd | 1213 | data->supported = mmd_eee_cap_to_ethtool_sup_t(val); |
a59a4d19 GC |
1214 | |
1215 | /* Get advertisement EEE */ | |
a6d99fcd | 1216 | val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); |
a59a4d19 GC |
1217 | if (val < 0) |
1218 | return val; | |
b32607dd | 1219 | data->advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
a59a4d19 GC |
1220 | |
1221 | /* Get LP advertisement EEE */ | |
a6d99fcd | 1222 | val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE); |
a59a4d19 GC |
1223 | if (val < 0) |
1224 | return val; | |
b32607dd | 1225 | data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
a59a4d19 GC |
1226 | |
1227 | return 0; | |
1228 | } | |
1229 | EXPORT_SYMBOL(phy_ethtool_get_eee); | |
1230 | ||
1231 | /** | |
1232 | * phy_ethtool_set_eee - set EEE supported and status | |
1233 | * @phydev: target phy_device struct | |
1234 | * @data: ethtool_eee data | |
1235 | * | |
1236 | * Description: it is to program the Advertisement EEE register. | |
1237 | */ | |
1238 | int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) | |
1239 | { | |
f75abeb8 | 1240 | int cap, old_adv, adv, ret; |
a59a4d19 | 1241 | |
25149ef9 FF |
1242 | if (!phydev->drv) |
1243 | return -EIO; | |
1244 | ||
83ea067f RK |
1245 | /* Get Supported EEE */ |
1246 | cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); | |
1247 | if (cap < 0) | |
1248 | return cap; | |
d853d145 | 1249 | |
f75abeb8 RK |
1250 | old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); |
1251 | if (old_adv < 0) | |
1252 | return old_adv; | |
1253 | ||
83ea067f | 1254 | adv = ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap; |
a59a4d19 | 1255 | |
83ea067f RK |
1256 | /* Mask prohibited EEE modes */ |
1257 | adv &= ~phydev->eee_broken_modes; | |
1258 | ||
f75abeb8 RK |
1259 | if (old_adv != adv) { |
1260 | ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv); | |
1261 | if (ret < 0) | |
1262 | return ret; | |
1263 | ||
1264 | /* Restart autonegotiation so the new modes get sent to the | |
1265 | * link partner. | |
1266 | */ | |
002ba705 | 1267 | ret = phy_restart_aneg(phydev); |
f75abeb8 RK |
1268 | if (ret < 0) |
1269 | return ret; | |
1270 | } | |
1271 | ||
1272 | return 0; | |
a59a4d19 GC |
1273 | } |
1274 | EXPORT_SYMBOL(phy_ethtool_set_eee); | |
42e836eb MS |
1275 | |
1276 | int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) | |
1277 | { | |
25149ef9 | 1278 | if (phydev->drv && phydev->drv->set_wol) |
42e836eb MS |
1279 | return phydev->drv->set_wol(phydev, wol); |
1280 | ||
1281 | return -EOPNOTSUPP; | |
1282 | } | |
1283 | EXPORT_SYMBOL(phy_ethtool_set_wol); | |
1284 | ||
1285 | void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) | |
1286 | { | |
25149ef9 | 1287 | if (phydev->drv && phydev->drv->get_wol) |
42e836eb MS |
1288 | phydev->drv->get_wol(phydev, wol); |
1289 | } | |
1290 | EXPORT_SYMBOL(phy_ethtool_get_wol); | |
9d9a77ce PR |
1291 | |
1292 | int phy_ethtool_get_link_ksettings(struct net_device *ndev, | |
1293 | struct ethtool_link_ksettings *cmd) | |
1294 | { | |
1295 | struct phy_device *phydev = ndev->phydev; | |
1296 | ||
1297 | if (!phydev) | |
1298 | return -ENODEV; | |
1299 | ||
5514174f | 1300 | phy_ethtool_ksettings_get(phydev, cmd); |
1301 | ||
1302 | return 0; | |
9d9a77ce PR |
1303 | } |
1304 | EXPORT_SYMBOL(phy_ethtool_get_link_ksettings); | |
1305 | ||
1306 | int phy_ethtool_set_link_ksettings(struct net_device *ndev, | |
1307 | const struct ethtool_link_ksettings *cmd) | |
1308 | { | |
1309 | struct phy_device *phydev = ndev->phydev; | |
1310 | ||
1311 | if (!phydev) | |
1312 | return -ENODEV; | |
1313 | ||
1314 | return phy_ethtool_ksettings_set(phydev, cmd); | |
1315 | } | |
1316 | EXPORT_SYMBOL(phy_ethtool_set_link_ksettings); | |
e86a8987 FF |
1317 | |
1318 | int phy_ethtool_nway_reset(struct net_device *ndev) | |
1319 | { | |
1320 | struct phy_device *phydev = ndev->phydev; | |
1321 | ||
1322 | if (!phydev) | |
1323 | return -ENODEV; | |
1324 | ||
25149ef9 FF |
1325 | if (!phydev->drv) |
1326 | return -EIO; | |
1327 | ||
002ba705 | 1328 | return phy_restart_aneg(phydev); |
e86a8987 FF |
1329 | } |
1330 | EXPORT_SYMBOL(phy_ethtool_nway_reset); |