Commit | Line | Data |
---|---|---|
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) | |
3e2186e0 | 49 | PHY_STATE_STR(READY) |
3e2186e0 | 50 | PHY_STATE_STR(UP) |
3e2186e0 FF |
51 | PHY_STATE_STR(RUNNING) |
52 | PHY_STATE_STR(NOLINK) | |
53 | PHY_STATE_STR(FORCING) | |
54 | PHY_STATE_STR(CHANGELINK) | |
55 | PHY_STATE_STR(HALTED) | |
56 | PHY_STATE_STR(RESUMING) | |
57 | } | |
58 | ||
59 | return NULL; | |
60 | } | |
61 | ||
74a992b3 HK |
62 | static void phy_link_up(struct phy_device *phydev) |
63 | { | |
64 | phydev->phy_link_change(phydev, true, true); | |
65 | phy_led_trigger_change_speed(phydev); | |
66 | } | |
67 | ||
68 | static void phy_link_down(struct phy_device *phydev, bool do_carrier) | |
69 | { | |
70 | phydev->phy_link_change(phydev, false, do_carrier); | |
71 | phy_led_trigger_change_speed(phydev); | |
72 | } | |
3e2186e0 | 73 | |
b3df0da8 RD |
74 | /** |
75 | * phy_print_status - Convenience function to print out the current phy status | |
76 | * @phydev: the phy_device struct | |
e1393456 AF |
77 | */ |
78 | void phy_print_status(struct phy_device *phydev) | |
79 | { | |
2f53e904 | 80 | if (phydev->link) { |
df40cc88 | 81 | netdev_info(phydev->attached_dev, |
766d1d38 FF |
82 | "Link is Up - %s/%s - flow control %s\n", |
83 | phy_speed_to_str(phydev->speed), | |
da4625ac | 84 | phy_duplex_to_str(phydev->duplex), |
df40cc88 | 85 | phydev->pause ? "rx/tx" : "off"); |
2f53e904 | 86 | } else { |
43b6329f | 87 | netdev_info(phydev->attached_dev, "Link is Down\n"); |
2f53e904 | 88 | } |
e1393456 AF |
89 | } |
90 | EXPORT_SYMBOL(phy_print_status); | |
00db8189 | 91 | |
b3df0da8 RD |
92 | /** |
93 | * phy_clear_interrupt - Ack the phy device's interrupt | |
94 | * @phydev: the phy_device struct | |
95 | * | |
96 | * If the @phydev driver has an ack_interrupt function, call it to | |
97 | * ack and clear the phy device's interrupt. | |
98 | * | |
ad033506 | 99 | * Returns 0 on success or < 0 on error. |
b3df0da8 | 100 | */ |
89ff05ec | 101 | static int phy_clear_interrupt(struct phy_device *phydev) |
00db8189 | 102 | { |
00db8189 | 103 | if (phydev->drv->ack_interrupt) |
e62a768f | 104 | return phydev->drv->ack_interrupt(phydev); |
00db8189 | 105 | |
e62a768f | 106 | return 0; |
00db8189 AF |
107 | } |
108 | ||
b3df0da8 RD |
109 | /** |
110 | * phy_config_interrupt - configure the PHY device for the requested interrupts | |
111 | * @phydev: the phy_device struct | |
112 | * @interrupts: interrupt flags to configure for this @phydev | |
113 | * | |
ad033506 | 114 | * Returns 0 on success or < 0 on error. |
b3df0da8 | 115 | */ |
695bce8f | 116 | static int phy_config_interrupt(struct phy_device *phydev, bool interrupts) |
00db8189 | 117 | { |
695bce8f | 118 | phydev->interrupts = interrupts ? 1 : 0; |
00db8189 | 119 | if (phydev->drv->config_intr) |
e62a768f | 120 | return phydev->drv->config_intr(phydev); |
00db8189 | 121 | |
e62a768f | 122 | return 0; |
00db8189 AF |
123 | } |
124 | ||
002ba705 RK |
125 | /** |
126 | * phy_restart_aneg - restart auto-negotiation | |
127 | * @phydev: target phy_device struct | |
128 | * | |
129 | * Restart the autonegotiation on @phydev. Returns >= 0 on success or | |
130 | * negative errno on error. | |
131 | */ | |
132 | int phy_restart_aneg(struct phy_device *phydev) | |
133 | { | |
134 | int ret; | |
135 | ||
136 | if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0))) | |
137 | ret = genphy_c45_restart_aneg(phydev); | |
138 | else | |
139 | ret = genphy_restart_aneg(phydev); | |
140 | ||
141 | return ret; | |
142 | } | |
143 | EXPORT_SYMBOL_GPL(phy_restart_aneg); | |
00db8189 | 144 | |
b3df0da8 RD |
145 | /** |
146 | * phy_aneg_done - return auto-negotiation status | |
147 | * @phydev: target phy_device struct | |
00db8189 | 148 | * |
76a423a3 FF |
149 | * Description: Return the auto-negotiation status from this @phydev |
150 | * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation | |
151 | * is still pending. | |
00db8189 | 152 | */ |
372788f9 | 153 | int phy_aneg_done(struct phy_device *phydev) |
00db8189 | 154 | { |
65f2767a | 155 | if (phydev->drv && phydev->drv->aneg_done) |
76a423a3 FF |
156 | return phydev->drv->aneg_done(phydev); |
157 | ||
41408ad5 RK |
158 | /* Avoid genphy_aneg_done() if the Clause 45 PHY does not |
159 | * implement Clause 22 registers | |
160 | */ | |
161 | if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0))) | |
162 | return -EINVAL; | |
163 | ||
a9fa6e6a | 164 | return genphy_aneg_done(phydev); |
00db8189 | 165 | } |
372788f9 | 166 | EXPORT_SYMBOL(phy_aneg_done); |
00db8189 | 167 | |
b3df0da8 | 168 | /** |
d0613037 RK |
169 | * phy_find_valid - find a PHY setting that matches the requested parameters |
170 | * @speed: desired speed | |
171 | * @duplex: desired duplex | |
172 | * @supported: mask of supported link modes | |
00db8189 | 173 | * |
d0613037 RK |
174 | * Locate a supported phy setting that is, in priority order: |
175 | * - an exact match for the specified speed and duplex mode | |
176 | * - a match for the specified speed, or slower speed | |
177 | * - the slowest supported speed | |
178 | * Returns the matched phy_setting entry, or %NULL if no supported phy | |
179 | * settings were found. | |
00db8189 | 180 | */ |
d0613037 | 181 | static const struct phy_setting * |
3c1bcc86 | 182 | phy_find_valid(int speed, int duplex, unsigned long *supported) |
00db8189 | 183 | { |
3c1bcc86 | 184 | return phy_lookup_setting(speed, duplex, supported, false); |
00db8189 AF |
185 | } |
186 | ||
1f9127ca ZB |
187 | /** |
188 | * phy_supported_speeds - return all speeds currently supported by a phy device | |
189 | * @phy: The phy device to return supported speeds of. | |
190 | * @speeds: buffer to store supported speeds in. | |
191 | * @size: size of speeds buffer. | |
192 | * | |
193 | * Description: Returns the number of supported speeds, and fills the speeds | |
194 | * buffer with the supported speeds. If speeds buffer is too small to contain | |
195 | * all currently supported speeds, will return as many speeds as can fit. | |
196 | */ | |
197 | unsigned int phy_supported_speeds(struct phy_device *phy, | |
198 | unsigned int *speeds, | |
199 | unsigned int size) | |
200 | { | |
3c1bcc86 | 201 | return phy_speeds(speeds, size, phy->supported); |
1f9127ca ZB |
202 | } |
203 | ||
54da5a8b GR |
204 | /** |
205 | * phy_check_valid - check if there is a valid PHY setting which matches | |
206 | * speed, duplex, and feature mask | |
207 | * @speed: speed to match | |
208 | * @duplex: duplex to match | |
209 | * @features: A mask of the valid settings | |
210 | * | |
211 | * Description: Returns true if there is a valid setting, false otherwise. | |
212 | */ | |
3c1bcc86 AL |
213 | static inline bool phy_check_valid(int speed, int duplex, |
214 | unsigned long *features) | |
54da5a8b | 215 | { |
3c1bcc86 | 216 | return !!phy_lookup_setting(speed, duplex, features, true); |
54da5a8b GR |
217 | } |
218 | ||
b3df0da8 RD |
219 | /** |
220 | * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex | |
221 | * @phydev: the target phy_device struct | |
00db8189 | 222 | * |
b3df0da8 | 223 | * Description: Make sure the PHY is set to supported speeds and |
00db8189 | 224 | * duplexes. Drop down by one in this order: 1000/FULL, |
b3df0da8 | 225 | * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF. |
00db8189 | 226 | */ |
89ff05ec | 227 | static void phy_sanitize_settings(struct phy_device *phydev) |
00db8189 | 228 | { |
d0613037 | 229 | const struct phy_setting *setting; |
00db8189 AF |
230 | |
231 | /* Sanitize settings based on PHY capabilities */ | |
3c1bcc86 | 232 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported)) |
163642a2 | 233 | phydev->autoneg = AUTONEG_DISABLE; |
00db8189 | 234 | |
3c1bcc86 AL |
235 | setting = phy_find_valid(phydev->speed, phydev->duplex, |
236 | phydev->supported); | |
d0613037 RK |
237 | if (setting) { |
238 | phydev->speed = setting->speed; | |
239 | phydev->duplex = setting->duplex; | |
240 | } else { | |
241 | /* We failed to find anything (no supported speeds?) */ | |
242 | phydev->speed = SPEED_UNKNOWN; | |
243 | phydev->duplex = DUPLEX_UNKNOWN; | |
244 | } | |
00db8189 | 245 | } |
00db8189 | 246 | |
b3df0da8 RD |
247 | /** |
248 | * phy_ethtool_sset - generic ethtool sset function, handles all the details | |
249 | * @phydev: target phy_device struct | |
250 | * @cmd: ethtool_cmd | |
00db8189 AF |
251 | * |
252 | * A few notes about parameter checking: | |
d651983d | 253 | * |
00db8189 AF |
254 | * - We don't set port or transceiver, so we don't care what they |
255 | * were set to. | |
256 | * - phy_start_aneg() will make sure forced settings are sane, and | |
257 | * choose the next best ones from the ones selected, so we don't | |
b3df0da8 | 258 | * care if ethtool tries to give us bad values. |
00db8189 AF |
259 | */ |
260 | int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd) | |
261 | { | |
3c1bcc86 | 262 | __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising); |
25db0338 DD |
263 | u32 speed = ethtool_cmd_speed(cmd); |
264 | ||
e5a03bfd | 265 | if (cmd->phy_address != phydev->mdio.addr) |
00db8189 AF |
266 | return -EINVAL; |
267 | ||
2f53e904 | 268 | /* We make sure that we don't pass unsupported values in to the PHY */ |
3c1bcc86 AL |
269 | ethtool_convert_legacy_u32_to_link_mode(advertising, cmd->advertising); |
270 | linkmode_and(advertising, advertising, phydev->supported); | |
00db8189 AF |
271 | |
272 | /* Verify the settings we care about. */ | |
273 | if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) | |
274 | return -EINVAL; | |
275 | ||
276 | if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) | |
277 | return -EINVAL; | |
278 | ||
8e95a202 | 279 | if (cmd->autoneg == AUTONEG_DISABLE && |
25db0338 DD |
280 | ((speed != SPEED_1000 && |
281 | speed != SPEED_100 && | |
282 | speed != SPEED_10) || | |
8e95a202 JP |
283 | (cmd->duplex != DUPLEX_HALF && |
284 | cmd->duplex != DUPLEX_FULL))) | |
00db8189 AF |
285 | return -EINVAL; |
286 | ||
287 | phydev->autoneg = cmd->autoneg; | |
288 | ||
25db0338 | 289 | phydev->speed = speed; |
00db8189 | 290 | |
3c1bcc86 | 291 | linkmode_copy(phydev->advertising, advertising); |
00db8189 AF |
292 | |
293 | if (AUTONEG_ENABLE == cmd->autoneg) | |
3c1bcc86 AL |
294 | linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, |
295 | phydev->advertising); | |
00db8189 | 296 | else |
3c1bcc86 AL |
297 | linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, |
298 | phydev->advertising); | |
00db8189 AF |
299 | |
300 | phydev->duplex = cmd->duplex; | |
301 | ||
1004ee61 | 302 | phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl; |
634ec36c | 303 | |
00db8189 AF |
304 | /* Restart the PHY */ |
305 | phy_start_aneg(phydev); | |
306 | ||
307 | return 0; | |
308 | } | |
9f6d55d0 | 309 | EXPORT_SYMBOL(phy_ethtool_sset); |
00db8189 | 310 | |
2d55173e PR |
311 | int phy_ethtool_ksettings_set(struct phy_device *phydev, |
312 | const struct ethtool_link_ksettings *cmd) | |
313 | { | |
3c1bcc86 | 314 | __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising); |
2d55173e PR |
315 | u8 autoneg = cmd->base.autoneg; |
316 | u8 duplex = cmd->base.duplex; | |
317 | u32 speed = cmd->base.speed; | |
2d55173e PR |
318 | |
319 | if (cmd->base.phy_address != phydev->mdio.addr) | |
320 | return -EINVAL; | |
321 | ||
3c1bcc86 | 322 | linkmode_copy(advertising, cmd->link_modes.advertising); |
2d55173e PR |
323 | |
324 | /* We make sure that we don't pass unsupported values in to the PHY */ | |
3c1bcc86 | 325 | linkmode_and(advertising, advertising, phydev->supported); |
2d55173e PR |
326 | |
327 | /* Verify the settings we care about. */ | |
328 | if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE) | |
329 | return -EINVAL; | |
330 | ||
3e536cff | 331 | if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising)) |
2d55173e PR |
332 | return -EINVAL; |
333 | ||
334 | if (autoneg == AUTONEG_DISABLE && | |
335 | ((speed != SPEED_1000 && | |
336 | speed != SPEED_100 && | |
337 | speed != SPEED_10) || | |
338 | (duplex != DUPLEX_HALF && | |
339 | duplex != DUPLEX_FULL))) | |
340 | return -EINVAL; | |
341 | ||
342 | phydev->autoneg = autoneg; | |
343 | ||
344 | phydev->speed = speed; | |
345 | ||
3c1bcc86 | 346 | linkmode_copy(phydev->advertising, advertising); |
2d55173e PR |
347 | |
348 | if (autoneg == AUTONEG_ENABLE) | |
3c1bcc86 AL |
349 | linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, |
350 | phydev->advertising); | |
2d55173e | 351 | else |
3c1bcc86 AL |
352 | linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, |
353 | phydev->advertising); | |
2d55173e PR |
354 | |
355 | phydev->duplex = duplex; | |
356 | ||
1004ee61 | 357 | phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl; |
2d55173e PR |
358 | |
359 | /* Restart the PHY */ | |
360 | phy_start_aneg(phydev); | |
361 | ||
362 | return 0; | |
363 | } | |
364 | EXPORT_SYMBOL(phy_ethtool_ksettings_set); | |
365 | ||
5514174f | 366 | void phy_ethtool_ksettings_get(struct phy_device *phydev, |
367 | struct ethtool_link_ksettings *cmd) | |
2d55173e | 368 | { |
3c1bcc86 AL |
369 | linkmode_copy(cmd->link_modes.supported, phydev->supported); |
370 | linkmode_copy(cmd->link_modes.advertising, phydev->advertising); | |
c0ec3c27 | 371 | linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising); |
2d55173e PR |
372 | |
373 | cmd->base.speed = phydev->speed; | |
374 | cmd->base.duplex = phydev->duplex; | |
375 | if (phydev->interface == PHY_INTERFACE_MODE_MOCA) | |
376 | cmd->base.port = PORT_BNC; | |
377 | else | |
378 | cmd->base.port = PORT_MII; | |
ceb62813 FF |
379 | cmd->base.transceiver = phy_is_internal(phydev) ? |
380 | XCVR_INTERNAL : XCVR_EXTERNAL; | |
2d55173e PR |
381 | cmd->base.phy_address = phydev->mdio.addr; |
382 | cmd->base.autoneg = phydev->autoneg; | |
1004ee61 RL |
383 | cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl; |
384 | cmd->base.eth_tp_mdix = phydev->mdix; | |
2d55173e PR |
385 | } |
386 | EXPORT_SYMBOL(phy_ethtool_ksettings_get); | |
00db8189 | 387 | |
b3df0da8 RD |
388 | /** |
389 | * phy_mii_ioctl - generic PHY MII ioctl interface | |
390 | * @phydev: the phy_device struct | |
00c7d920 | 391 | * @ifr: &struct ifreq for socket ioctl's |
b3df0da8 RD |
392 | * @cmd: ioctl cmd to execute |
393 | * | |
394 | * Note that this function is currently incompatible with the | |
00db8189 | 395 | * PHYCONTROL layer. It changes registers without regard to |
b3df0da8 | 396 | * current state. Use at own risk. |
00db8189 | 397 | */ |
2f53e904 | 398 | int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd) |
00db8189 | 399 | { |
28b04113 | 400 | struct mii_ioctl_data *mii_data = if_mii(ifr); |
00db8189 | 401 | u16 val = mii_data->val_in; |
79ce0477 | 402 | bool change_autoneg = false; |
00db8189 AF |
403 | |
404 | switch (cmd) { | |
405 | case SIOCGMIIPHY: | |
e5a03bfd | 406 | mii_data->phy_id = phydev->mdio.addr; |
c6d6a511 LB |
407 | /* fall through */ |
408 | ||
00db8189 | 409 | case SIOCGMIIREG: |
e5a03bfd AL |
410 | mii_data->val_out = mdiobus_read(phydev->mdio.bus, |
411 | mii_data->phy_id, | |
af1dc13e | 412 | mii_data->reg_num); |
e62a768f | 413 | return 0; |
00db8189 AF |
414 | |
415 | case SIOCSMIIREG: | |
e5a03bfd | 416 | if (mii_data->phy_id == phydev->mdio.addr) { |
e109374f | 417 | switch (mii_data->reg_num) { |
00db8189 | 418 | case MII_BMCR: |
79ce0477 BH |
419 | if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) { |
420 | if (phydev->autoneg == AUTONEG_ENABLE) | |
421 | change_autoneg = true; | |
00db8189 | 422 | phydev->autoneg = AUTONEG_DISABLE; |
79ce0477 BH |
423 | if (val & BMCR_FULLDPLX) |
424 | phydev->duplex = DUPLEX_FULL; | |
425 | else | |
426 | phydev->duplex = DUPLEX_HALF; | |
427 | if (val & BMCR_SPEED1000) | |
428 | phydev->speed = SPEED_1000; | |
429 | else if (val & BMCR_SPEED100) | |
430 | phydev->speed = SPEED_100; | |
431 | else phydev->speed = SPEED_10; | |
432 | } | |
433 | else { | |
434 | if (phydev->autoneg == AUTONEG_DISABLE) | |
435 | change_autoneg = true; | |
00db8189 | 436 | phydev->autoneg = AUTONEG_ENABLE; |
79ce0477 | 437 | } |
00db8189 AF |
438 | break; |
439 | case MII_ADVERTISE: | |
9db299c7 AL |
440 | mii_adv_mod_linkmode_adv_t(phydev->advertising, |
441 | val); | |
79ce0477 | 442 | change_autoneg = true; |
00db8189 AF |
443 | break; |
444 | default: | |
445 | /* do nothing */ | |
446 | break; | |
447 | } | |
448 | } | |
449 | ||
e5a03bfd | 450 | mdiobus_write(phydev->mdio.bus, mii_data->phy_id, |
af1dc13e PK |
451 | mii_data->reg_num, val); |
452 | ||
e5a03bfd | 453 | if (mii_data->phy_id == phydev->mdio.addr && |
cf18b778 | 454 | mii_data->reg_num == MII_BMCR && |
2613f95f | 455 | val & BMCR_RESET) |
e62a768f | 456 | return phy_init_hw(phydev); |
79ce0477 BH |
457 | |
458 | if (change_autoneg) | |
459 | return phy_start_aneg(phydev); | |
460 | ||
e62a768f | 461 | return 0; |
dda93b48 | 462 | |
c1f19b51 | 463 | case SIOCSHWTSTAMP: |
25149ef9 | 464 | if (phydev->drv && phydev->drv->hwtstamp) |
c1f19b51 RC |
465 | return phydev->drv->hwtstamp(phydev, ifr); |
466 | /* fall through */ | |
467 | ||
dda93b48 | 468 | default: |
c6d6a511 | 469 | return -EOPNOTSUPP; |
00db8189 | 470 | } |
00db8189 | 471 | } |
680e9fe9 | 472 | EXPORT_SYMBOL(phy_mii_ioctl); |
00db8189 | 473 | |
a3320bcf HK |
474 | static void phy_queue_state_machine(struct phy_device *phydev, |
475 | unsigned int secs) | |
476 | { | |
477 | mod_delayed_work(system_power_efficient_wq, &phydev->state_queue, | |
478 | secs * HZ); | |
479 | } | |
480 | ||
481 | static void phy_trigger_machine(struct phy_device *phydev) | |
482 | { | |
483 | phy_queue_state_machine(phydev, 0); | |
484 | } | |
485 | ||
76299580 HK |
486 | static int phy_config_aneg(struct phy_device *phydev) |
487 | { | |
488 | if (phydev->drv->config_aneg) | |
489 | return phydev->drv->config_aneg(phydev); | |
34786005 CG |
490 | |
491 | /* Clause 45 PHYs that don't implement Clause 22 registers are not | |
492 | * allowed to call genphy_config_aneg() | |
493 | */ | |
494 | if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0))) | |
495 | return -EOPNOTSUPP; | |
496 | ||
497 | return genphy_config_aneg(phydev); | |
76299580 HK |
498 | } |
499 | ||
74a992b3 HK |
500 | /** |
501 | * phy_check_link_status - check link status and set state accordingly | |
502 | * @phydev: the phy_device struct | |
503 | * | |
504 | * Description: Check for link and whether autoneg was triggered / is running | |
505 | * and set state accordingly | |
506 | */ | |
507 | static int phy_check_link_status(struct phy_device *phydev) | |
508 | { | |
509 | int err; | |
510 | ||
511 | WARN_ON(!mutex_is_locked(&phydev->lock)); | |
512 | ||
513 | err = phy_read_status(phydev); | |
514 | if (err) | |
515 | return err; | |
516 | ||
517 | if (phydev->link && phydev->state != PHY_RUNNING) { | |
518 | phydev->state = PHY_RUNNING; | |
519 | phy_link_up(phydev); | |
520 | } else if (!phydev->link && phydev->state != PHY_NOLINK) { | |
521 | phydev->state = PHY_NOLINK; | |
522 | phy_link_down(phydev, true); | |
523 | } | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
b3df0da8 | 528 | /** |
c45d7150 | 529 | * phy_start_aneg - start auto-negotiation for this PHY device |
b3df0da8 | 530 | * @phydev: the phy_device struct |
e1393456 | 531 | * |
b3df0da8 RD |
532 | * Description: Sanitizes the settings (if we're not autonegotiating |
533 | * them), and then calls the driver's config_aneg function. | |
534 | * If the PHYCONTROL Layer is operating, we change the state to | |
535 | * reflect the beginning of Auto-negotiation or forcing. | |
e1393456 | 536 | */ |
c45d7150 | 537 | int phy_start_aneg(struct phy_device *phydev) |
e1393456 AF |
538 | { |
539 | int err; | |
540 | ||
25149ef9 FF |
541 | if (!phydev->drv) |
542 | return -EIO; | |
543 | ||
35b5f6b1 | 544 | mutex_lock(&phydev->lock); |
e1393456 | 545 | |
2b3e88ea HK |
546 | if (!__phy_is_started(phydev)) { |
547 | WARN(1, "called from state %s\n", | |
548 | phy_state_to_str(phydev->state)); | |
549 | err = -EBUSY; | |
550 | goto out_unlock; | |
551 | } | |
552 | ||
e1393456 AF |
553 | if (AUTONEG_DISABLE == phydev->autoneg) |
554 | phy_sanitize_settings(phydev); | |
555 | ||
9b3320ef | 556 | /* Invalidate LP advertising flags */ |
c0ec3c27 | 557 | linkmode_zero(phydev->lp_advertising); |
9b3320ef | 558 | |
76299580 | 559 | err = phy_config_aneg(phydev); |
e1393456 AF |
560 | if (err < 0) |
561 | goto out_unlock; | |
562 | ||
2b3e88ea HK |
563 | if (phydev->autoneg == AUTONEG_ENABLE) { |
564 | err = phy_check_link_status(phydev); | |
565 | } else { | |
566 | phydev->state = PHY_FORCING; | |
567 | phydev->link_timeout = PHY_FORCE_TIMEOUT; | |
e1393456 AF |
568 | } |
569 | ||
570 | out_unlock: | |
35b5f6b1 | 571 | mutex_unlock(&phydev->lock); |
f555f34f | 572 | |
e1393456 AF |
573 | return err; |
574 | } | |
575 | EXPORT_SYMBOL(phy_start_aneg); | |
576 | ||
2b9672dd HK |
577 | static int phy_poll_aneg_done(struct phy_device *phydev) |
578 | { | |
579 | unsigned int retries = 100; | |
580 | int ret; | |
581 | ||
582 | do { | |
583 | msleep(100); | |
584 | ret = phy_aneg_done(phydev); | |
585 | } while (!ret && --retries); | |
586 | ||
587 | if (!ret) | |
588 | return -ETIMEDOUT; | |
589 | ||
590 | return ret < 0 ? ret : 0; | |
591 | } | |
592 | ||
593 | /** | |
594 | * phy_speed_down - set speed to lowest speed supported by both link partners | |
595 | * @phydev: the phy_device struct | |
596 | * @sync: perform action synchronously | |
597 | * | |
598 | * Description: Typically used to save energy when waiting for a WoL packet | |
599 | * | |
600 | * WARNING: Setting sync to false may cause the system being unable to suspend | |
601 | * in case the PHY generates an interrupt when finishing the autonegotiation. | |
602 | * This interrupt may wake up the system immediately after suspend. | |
603 | * Therefore use sync = false only if you're sure it's safe with the respective | |
604 | * network chip. | |
605 | */ | |
606 | int phy_speed_down(struct phy_device *phydev, bool sync) | |
607 | { | |
3c1bcc86 AL |
608 | __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_old); |
609 | __ETHTOOL_DECLARE_LINK_MODE_MASK(adv); | |
2b9672dd HK |
610 | int ret; |
611 | ||
612 | if (phydev->autoneg != AUTONEG_ENABLE) | |
613 | return 0; | |
614 | ||
3c1bcc86 | 615 | linkmode_copy(adv_old, phydev->advertising); |
c0ec3c27 | 616 | linkmode_copy(adv, phydev->lp_advertising); |
3c1bcc86 AL |
617 | linkmode_and(adv, adv, phydev->supported); |
618 | ||
619 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, adv) || | |
620 | linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, adv)) { | |
621 | linkmode_clear_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, | |
622 | phydev->advertising); | |
623 | linkmode_clear_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, | |
624 | phydev->advertising); | |
625 | linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, | |
626 | phydev->advertising); | |
627 | linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, | |
628 | phydev->advertising); | |
629 | } else if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, | |
630 | adv) || | |
631 | linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, | |
632 | adv)) { | |
633 | linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, | |
634 | phydev->advertising); | |
635 | linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, | |
636 | phydev->advertising); | |
637 | } | |
2b9672dd | 638 | |
3c1bcc86 | 639 | if (linkmode_equal(phydev->advertising, adv_old)) |
2b9672dd HK |
640 | return 0; |
641 | ||
642 | ret = phy_config_aneg(phydev); | |
643 | if (ret) | |
644 | return ret; | |
645 | ||
646 | return sync ? phy_poll_aneg_done(phydev) : 0; | |
647 | } | |
648 | EXPORT_SYMBOL_GPL(phy_speed_down); | |
649 | ||
650 | /** | |
651 | * phy_speed_up - (re)set advertised speeds to all supported speeds | |
652 | * @phydev: the phy_device struct | |
653 | * | |
654 | * Description: Used to revert the effect of phy_speed_down | |
655 | */ | |
656 | int phy_speed_up(struct phy_device *phydev) | |
657 | { | |
3c1bcc86 AL |
658 | __ETHTOOL_DECLARE_LINK_MODE_MASK(all_speeds) = { 0, }; |
659 | __ETHTOOL_DECLARE_LINK_MODE_MASK(not_speeds); | |
660 | __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); | |
661 | __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_old); | |
662 | __ETHTOOL_DECLARE_LINK_MODE_MASK(speeds); | |
663 | ||
664 | linkmode_copy(adv_old, phydev->advertising); | |
2b9672dd HK |
665 | |
666 | if (phydev->autoneg != AUTONEG_ENABLE) | |
667 | return 0; | |
668 | ||
3c1bcc86 AL |
669 | linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, all_speeds); |
670 | linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, all_speeds); | |
671 | linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, all_speeds); | |
672 | linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, all_speeds); | |
673 | linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, all_speeds); | |
674 | linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, all_speeds); | |
2b9672dd | 675 | |
3c1bcc86 AL |
676 | linkmode_andnot(not_speeds, adv_old, all_speeds); |
677 | linkmode_copy(supported, phydev->supported); | |
678 | linkmode_and(speeds, supported, all_speeds); | |
679 | linkmode_or(phydev->advertising, not_speeds, speeds); | |
680 | ||
681 | if (linkmode_equal(phydev->advertising, adv_old)) | |
2b9672dd HK |
682 | return 0; |
683 | ||
684 | return phy_config_aneg(phydev); | |
685 | } | |
686 | EXPORT_SYMBOL_GPL(phy_speed_up); | |
687 | ||
b3df0da8 RD |
688 | /** |
689 | * phy_start_machine - start PHY state machine tracking | |
690 | * @phydev: the phy_device struct | |
00db8189 | 691 | * |
b3df0da8 | 692 | * Description: The PHY infrastructure can run a state machine |
00db8189 | 693 | * which tracks whether the PHY is starting up, negotiating, |
fb5e7606 FF |
694 | * etc. This function starts the delayed workqueue which tracks |
695 | * the state of the PHY. If you want to maintain your own state machine, | |
29935aeb | 696 | * do not call this function. |
b3df0da8 | 697 | */ |
29935aeb | 698 | void phy_start_machine(struct phy_device *phydev) |
00db8189 | 699 | { |
6384e483 | 700 | phy_trigger_machine(phydev); |
00db8189 | 701 | } |
5e5758d9 | 702 | EXPORT_SYMBOL_GPL(phy_start_machine); |
00db8189 | 703 | |
b3df0da8 RD |
704 | /** |
705 | * phy_stop_machine - stop the PHY state machine tracking | |
706 | * @phydev: target phy_device struct | |
00db8189 | 707 | * |
fb5e7606 FF |
708 | * Description: Stops the state machine delayed workqueue, sets the |
709 | * state to UP (unless it wasn't up yet). This function must be | |
710 | * called BEFORE phy_detach. | |
00db8189 AF |
711 | */ |
712 | void phy_stop_machine(struct phy_device *phydev) | |
713 | { | |
a390d1f3 | 714 | cancel_delayed_work_sync(&phydev->state_queue); |
00db8189 | 715 | |
35b5f6b1 | 716 | mutex_lock(&phydev->lock); |
2b3e88ea | 717 | if (__phy_is_started(phydev)) |
00db8189 | 718 | phydev->state = PHY_UP; |
35b5f6b1 | 719 | mutex_unlock(&phydev->lock); |
00db8189 AF |
720 | } |
721 | ||
b3df0da8 RD |
722 | /** |
723 | * phy_error - enter HALTED state for this PHY device | |
724 | * @phydev: target phy_device struct | |
00db8189 AF |
725 | * |
726 | * Moves the PHY to the HALTED state in response to a read | |
727 | * or write error, and tells the controller the link is down. | |
728 | * Must not be called from interrupt context, or while the | |
729 | * phydev->lock is held. | |
730 | */ | |
9b9a8bfc | 731 | static void phy_error(struct phy_device *phydev) |
00db8189 | 732 | { |
fa7b28c1 HK |
733 | WARN_ON(1); |
734 | ||
35b5f6b1 | 735 | mutex_lock(&phydev->lock); |
00db8189 | 736 | phydev->state = PHY_HALTED; |
35b5f6b1 | 737 | mutex_unlock(&phydev->lock); |
3c293f4e | 738 | |
9f2959b6 | 739 | phy_trigger_machine(phydev); |
00db8189 AF |
740 | } |
741 | ||
a2c054a8 BM |
742 | /** |
743 | * phy_disable_interrupts - Disable the PHY interrupts from the PHY side | |
744 | * @phydev: target phy_device struct | |
745 | */ | |
746 | static int phy_disable_interrupts(struct phy_device *phydev) | |
747 | { | |
748 | int err; | |
749 | ||
750 | /* Disable PHY interrupts */ | |
751 | err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); | |
752 | if (err) | |
03fe2deb | 753 | return err; |
a2c054a8 BM |
754 | |
755 | /* Clear the interrupt */ | |
03fe2deb | 756 | return phy_clear_interrupt(phydev); |
a2c054a8 BM |
757 | } |
758 | ||
759 | /** | |
34d884e3 HK |
760 | * phy_interrupt - PHY interrupt handler |
761 | * @irq: interrupt line | |
762 | * @phy_dat: phy_device pointer | |
763 | * | |
764 | * Description: Handle PHY interrupt | |
a2c054a8 | 765 | */ |
34d884e3 | 766 | static irqreturn_t phy_interrupt(int irq, void *phy_dat) |
a2c054a8 | 767 | { |
34d884e3 | 768 | struct phy_device *phydev = phy_dat; |
a2c054a8 | 769 | |
2b3e88ea | 770 | if (!phy_is_started(phydev)) |
34d884e3 HK |
771 | return IRQ_NONE; /* It can't be ours. */ |
772 | ||
773 | if (phydev->drv->did_interrupt && !phydev->drv->did_interrupt(phydev)) | |
774 | return IRQ_NONE; | |
a2c054a8 | 775 | |
a2c054a8 | 776 | /* reschedule state queue work to run as soon as possible */ |
9f2959b6 | 777 | phy_trigger_machine(phydev); |
a2c054a8 | 778 | |
34d884e3 | 779 | if (phy_clear_interrupt(phydev)) |
a2c054a8 BM |
780 | goto phy_err; |
781 | return IRQ_HANDLED; | |
782 | ||
783 | phy_err: | |
784 | phy_error(phydev); | |
785 | return IRQ_NONE; | |
786 | } | |
787 | ||
b3df0da8 RD |
788 | /** |
789 | * phy_enable_interrupts - Enable the interrupts from the PHY side | |
790 | * @phydev: target phy_device struct | |
791 | */ | |
89ff05ec | 792 | static int phy_enable_interrupts(struct phy_device *phydev) |
00db8189 | 793 | { |
553fe92b | 794 | int err = phy_clear_interrupt(phydev); |
00db8189 | 795 | |
e1393456 AF |
796 | if (err < 0) |
797 | return err; | |
00db8189 | 798 | |
553fe92b | 799 | return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); |
00db8189 | 800 | } |
00db8189 | 801 | |
b3df0da8 RD |
802 | /** |
803 | * phy_start_interrupts - request and enable interrupts for a PHY device | |
804 | * @phydev: target phy_device struct | |
e1393456 | 805 | * |
b3df0da8 RD |
806 | * Description: Request the interrupt for the given PHY. |
807 | * If this fails, then we set irq to PHY_POLL. | |
e1393456 | 808 | * Otherwise, we enable the interrupts in the PHY. |
e1393456 | 809 | * This should only be called with a valid IRQ number. |
b3df0da8 | 810 | * Returns 0 on success or < 0 on error. |
e1393456 AF |
811 | */ |
812 | int phy_start_interrupts(struct phy_device *phydev) | |
813 | { | |
c974bdbc AL |
814 | if (request_threaded_irq(phydev->irq, NULL, phy_interrupt, |
815 | IRQF_ONESHOT | IRQF_SHARED, | |
ae0219cb | 816 | phydev_name(phydev), phydev) < 0) { |
8d242488 | 817 | pr_warn("%s: Can't get IRQ %d (PHY)\n", |
e5a03bfd | 818 | phydev->mdio.bus->name, phydev->irq); |
e1393456 AF |
819 | phydev->irq = PHY_POLL; |
820 | return 0; | |
821 | } | |
822 | ||
e62a768f | 823 | return phy_enable_interrupts(phydev); |
e1393456 AF |
824 | } |
825 | EXPORT_SYMBOL(phy_start_interrupts); | |
826 | ||
b3df0da8 RD |
827 | /** |
828 | * phy_stop_interrupts - disable interrupts from a PHY device | |
829 | * @phydev: target phy_device struct | |
830 | */ | |
e1393456 AF |
831 | int phy_stop_interrupts(struct phy_device *phydev) |
832 | { | |
553fe92b | 833 | int err = phy_disable_interrupts(phydev); |
e1393456 AF |
834 | |
835 | if (err) | |
836 | phy_error(phydev); | |
837 | ||
0ac49527 MR |
838 | free_irq(phydev->irq, phydev); |
839 | ||
e1393456 AF |
840 | return err; |
841 | } | |
842 | EXPORT_SYMBOL(phy_stop_interrupts); | |
843 | ||
b3df0da8 RD |
844 | /** |
845 | * phy_stop - Bring down the PHY link, and stop checking the status | |
846 | * @phydev: target phy_device struct | |
847 | */ | |
e1393456 AF |
848 | void phy_stop(struct phy_device *phydev) |
849 | { | |
35b5f6b1 | 850 | mutex_lock(&phydev->lock); |
e1393456 | 851 | |
2b3e88ea HK |
852 | if (!__phy_is_started(phydev)) { |
853 | WARN(1, "called from state %s\n", | |
854 | phy_state_to_str(phydev->state)); | |
855 | mutex_unlock(&phydev->lock); | |
856 | return; | |
857 | } | |
e1393456 | 858 | |
70a55c32 HK |
859 | if (phy_interrupt_is_valid(phydev)) |
860 | phy_disable_interrupts(phydev); | |
e1393456 | 861 | |
6daf6531 MR |
862 | phydev->state = PHY_HALTED; |
863 | ||
35b5f6b1 | 864 | mutex_unlock(&phydev->lock); |
3c3070d7 | 865 | |
e8cfd9d6 HK |
866 | phy_state_machine(&phydev->state_queue.work); |
867 | ||
2f53e904 | 868 | /* Cannot call flush_scheduled_work() here as desired because |
34d884e3 | 869 | * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler |
3c3070d7 MR |
870 | * will not reenable interrupts. |
871 | */ | |
e1393456 | 872 | } |
2f53e904 | 873 | EXPORT_SYMBOL(phy_stop); |
e1393456 | 874 | |
b3df0da8 RD |
875 | /** |
876 | * phy_start - start or restart a PHY device | |
877 | * @phydev: target phy_device struct | |
e1393456 | 878 | * |
b3df0da8 | 879 | * Description: Indicates the attached device's readiness to |
e1393456 AF |
880 | * handle PHY-related work. Used during startup to start the |
881 | * PHY, and after a call to phy_stop() to resume operation. | |
882 | * Also used to indicate the MDIO bus has cleared an error | |
883 | * condition. | |
884 | */ | |
885 | void phy_start(struct phy_device *phydev) | |
886 | { | |
c15e10e7 TB |
887 | int err = 0; |
888 | ||
35b5f6b1 | 889 | mutex_lock(&phydev->lock); |
e1393456 AF |
890 | |
891 | switch (phydev->state) { | |
e109374f FF |
892 | case PHY_READY: |
893 | phydev->state = PHY_UP; | |
894 | break; | |
895 | case PHY_HALTED: | |
f5e64032 | 896 | /* if phy was suspended, bring the physical link up again */ |
9c2c2e62 | 897 | __phy_resume(phydev); |
f5e64032 | 898 | |
c15e10e7 | 899 | /* make sure interrupts are re-enabled for the PHY */ |
08f51385 | 900 | if (phy_interrupt_is_valid(phydev)) { |
84a527a4 SX |
901 | err = phy_enable_interrupts(phydev); |
902 | if (err < 0) | |
903 | break; | |
904 | } | |
c15e10e7 | 905 | |
e109374f | 906 | phydev->state = PHY_RESUMING; |
c15e10e7 | 907 | break; |
e109374f FF |
908 | default: |
909 | break; | |
e1393456 | 910 | } |
35b5f6b1 | 911 | mutex_unlock(&phydev->lock); |
c15e10e7 | 912 | |
9f2959b6 | 913 | phy_trigger_machine(phydev); |
e1393456 | 914 | } |
e1393456 | 915 | EXPORT_SYMBOL(phy_start); |
67c4f3fa | 916 | |
35b5f6b1 NC |
917 | /** |
918 | * phy_state_machine - Handle the state machine | |
919 | * @work: work_struct that describes the work to be done | |
35b5f6b1 | 920 | */ |
4f9c85a1 | 921 | void phy_state_machine(struct work_struct *work) |
00db8189 | 922 | { |
bf6aede7 | 923 | struct delayed_work *dwork = to_delayed_work(work); |
35b5f6b1 | 924 | struct phy_device *phydev = |
a390d1f3 | 925 | container_of(dwork, struct phy_device, state_queue); |
c15e10e7 | 926 | bool needs_aneg = false, do_suspend = false; |
3e2186e0 | 927 | enum phy_state old_state; |
00db8189 AF |
928 | int err = 0; |
929 | ||
35b5f6b1 | 930 | mutex_lock(&phydev->lock); |
00db8189 | 931 | |
3e2186e0 FF |
932 | old_state = phydev->state; |
933 | ||
25149ef9 | 934 | if (phydev->drv && phydev->drv->link_change_notify) |
2b8f2a28 DM |
935 | phydev->drv->link_change_notify(phydev); |
936 | ||
e109374f FF |
937 | switch (phydev->state) { |
938 | case PHY_DOWN: | |
e109374f | 939 | case PHY_READY: |
e109374f FF |
940 | break; |
941 | case PHY_UP: | |
6e14a5ee | 942 | needs_aneg = true; |
00db8189 | 943 | |
e109374f FF |
944 | break; |
945 | case PHY_NOLINK: | |
c8e977ba | 946 | case PHY_RUNNING: |
c8e977ba HK |
947 | case PHY_CHANGELINK: |
948 | case PHY_RESUMING: | |
949 | err = phy_check_link_status(phydev); | |
e109374f FF |
950 | break; |
951 | case PHY_FORCING: | |
952 | err = genphy_update_link(phydev); | |
e109374f | 953 | if (err) |
00db8189 | 954 | break; |
00db8189 | 955 | |
e109374f FF |
956 | if (phydev->link) { |
957 | phydev->state = PHY_RUNNING; | |
a81497be | 958 | phy_link_up(phydev); |
e109374f FF |
959 | } else { |
960 | if (0 == phydev->link_timeout--) | |
6e14a5ee | 961 | needs_aneg = true; |
a81497be | 962 | phy_link_down(phydev, false); |
e109374f | 963 | } |
e109374f | 964 | break; |
e109374f FF |
965 | case PHY_HALTED: |
966 | if (phydev->link) { | |
967 | phydev->link = 0; | |
a81497be | 968 | phy_link_down(phydev, true); |
6e14a5ee | 969 | do_suspend = true; |
e109374f FF |
970 | } |
971 | break; | |
00db8189 AF |
972 | } |
973 | ||
35b5f6b1 | 974 | mutex_unlock(&phydev->lock); |
00db8189 AF |
975 | |
976 | if (needs_aneg) | |
c45d7150 | 977 | err = phy_start_aneg(phydev); |
6e14a5ee | 978 | else if (do_suspend) |
be9dad1f SH |
979 | phy_suspend(phydev); |
980 | ||
00db8189 AF |
981 | if (err < 0) |
982 | phy_error(phydev); | |
983 | ||
6a95befc MG |
984 | if (old_state != phydev->state) |
985 | phydev_dbg(phydev, "PHY state change %s -> %s\n", | |
986 | phy_state_to_str(old_state), | |
987 | phy_state_to_str(phydev->state)); | |
3e2186e0 | 988 | |
d5c3d846 FF |
989 | /* Only re-schedule a PHY state machine change if we are polling the |
990 | * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving | |
075ddebc HK |
991 | * between states from phy_mac_interrupt(). |
992 | * | |
993 | * In state PHY_HALTED the PHY gets suspended, so rescheduling the | |
994 | * state machine would be pointless and possibly error prone when | |
995 | * called from phy_disconnect() synchronously. | |
d5c3d846 | 996 | */ |
2b3e88ea | 997 | if (phy_polling_mode(phydev) && phy_is_started(phydev)) |
9f2959b6 | 998 | phy_queue_state_machine(phydev, PHY_STATE_TIME); |
35b5f6b1 | 999 | } |
a59a4d19 | 1000 | |
664fcf12 AL |
1001 | /** |
1002 | * phy_mac_interrupt - MAC says the link has changed | |
1003 | * @phydev: phy_device struct with changed link | |
664fcf12 | 1004 | * |
28b2e0d2 HK |
1005 | * The MAC layer is able to indicate there has been a change in the PHY link |
1006 | * status. Trigger the state machine and work a work queue. | |
664fcf12 | 1007 | */ |
28b2e0d2 | 1008 | void phy_mac_interrupt(struct phy_device *phydev) |
5ea94e76 | 1009 | { |
deccd16f | 1010 | /* Trigger a state machine change */ |
d73a2156 | 1011 | phy_trigger_machine(phydev); |
5ea94e76 FF |
1012 | } |
1013 | EXPORT_SYMBOL(phy_mac_interrupt); | |
1014 | ||
3c1bcc86 AL |
1015 | static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv) |
1016 | { | |
1017 | linkmode_zero(advertising); | |
1018 | ||
1019 | if (eee_adv & MDIO_EEE_100TX) | |
1020 | linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, | |
1021 | advertising); | |
1022 | if (eee_adv & MDIO_EEE_1000T) | |
1023 | linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, | |
1024 | advertising); | |
1025 | if (eee_adv & MDIO_EEE_10GT) | |
1026 | linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, | |
1027 | advertising); | |
1028 | if (eee_adv & MDIO_EEE_1000KX) | |
1029 | linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, | |
1030 | advertising); | |
1031 | if (eee_adv & MDIO_EEE_10GKX4) | |
1032 | linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, | |
1033 | advertising); | |
1034 | if (eee_adv & MDIO_EEE_10GKR) | |
1035 | linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, | |
1036 | advertising); | |
1037 | } | |
1038 | ||
a59a4d19 GC |
1039 | /** |
1040 | * phy_init_eee - init and check the EEE feature | |
1041 | * @phydev: target phy_device struct | |
1042 | * @clk_stop_enable: PHY may stop the clock during LPI | |
1043 | * | |
1044 | * Description: it checks if the Energy-Efficient Ethernet (EEE) | |
1045 | * is supported by looking at the MMD registers 3.20 and 7.60/61 | |
1046 | * and it programs the MMD register 3.0 setting the "Clock stop enable" | |
1047 | * bit if required. | |
1048 | */ | |
1049 | int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable) | |
1050 | { | |
25149ef9 FF |
1051 | if (!phydev->drv) |
1052 | return -EIO; | |
1053 | ||
a59a4d19 | 1054 | /* According to 802.3az,the EEE is supported only in full duplex-mode. |
a59a4d19 | 1055 | */ |
32d75141 | 1056 | if (phydev->duplex == DUPLEX_FULL) { |
3c1bcc86 AL |
1057 | __ETHTOOL_DECLARE_LINK_MODE_MASK(common); |
1058 | __ETHTOOL_DECLARE_LINK_MODE_MASK(lp); | |
1059 | __ETHTOOL_DECLARE_LINK_MODE_MASK(adv); | |
a59a4d19 | 1060 | int eee_lp, eee_cap, eee_adv; |
4ae6e50c | 1061 | int status; |
3c1bcc86 | 1062 | u32 cap; |
a59a4d19 GC |
1063 | |
1064 | /* Read phy status to properly get the right settings */ | |
1065 | status = phy_read_status(phydev); | |
1066 | if (status) | |
1067 | return status; | |
1068 | ||
1069 | /* First check if the EEE ability is supported */ | |
a6d99fcd | 1070 | eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); |
7a4cecf7 GC |
1071 | if (eee_cap <= 0) |
1072 | goto eee_exit_err; | |
a59a4d19 | 1073 | |
b32607dd | 1074 | cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap); |
a59a4d19 | 1075 | if (!cap) |
7a4cecf7 | 1076 | goto eee_exit_err; |
a59a4d19 GC |
1077 | |
1078 | /* Check which link settings negotiated and verify it in | |
1079 | * the EEE advertising registers. | |
1080 | */ | |
a6d99fcd | 1081 | eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE); |
7a4cecf7 GC |
1082 | if (eee_lp <= 0) |
1083 | goto eee_exit_err; | |
a59a4d19 | 1084 | |
a6d99fcd | 1085 | eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); |
7a4cecf7 GC |
1086 | if (eee_adv <= 0) |
1087 | goto eee_exit_err; | |
a59a4d19 | 1088 | |
3c1bcc86 AL |
1089 | mmd_eee_adv_to_linkmode(adv, eee_adv); |
1090 | mmd_eee_adv_to_linkmode(lp, eee_lp); | |
1091 | linkmode_and(common, adv, lp); | |
1092 | ||
1093 | if (!phy_check_valid(phydev->speed, phydev->duplex, common)) | |
7a4cecf7 | 1094 | goto eee_exit_err; |
a59a4d19 GC |
1095 | |
1096 | if (clk_stop_enable) { | |
1097 | /* Configure the PHY to stop receiving xMII | |
1098 | * clock while it is signaling LPI. | |
1099 | */ | |
a6d99fcd | 1100 | int val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1); |
a59a4d19 GC |
1101 | if (val < 0) |
1102 | return val; | |
1103 | ||
1104 | val |= MDIO_PCS_CTRL1_CLKSTOP_EN; | |
a6d99fcd | 1105 | phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, val); |
a59a4d19 GC |
1106 | } |
1107 | ||
e62a768f | 1108 | return 0; /* EEE supported */ |
a59a4d19 | 1109 | } |
7a4cecf7 | 1110 | eee_exit_err: |
e62a768f | 1111 | return -EPROTONOSUPPORT; |
a59a4d19 GC |
1112 | } |
1113 | EXPORT_SYMBOL(phy_init_eee); | |
1114 | ||
1115 | /** | |
1116 | * phy_get_eee_err - report the EEE wake error count | |
1117 | * @phydev: target phy_device struct | |
1118 | * | |
1119 | * Description: it is to report the number of time where the PHY | |
1120 | * failed to complete its normal wake sequence. | |
1121 | */ | |
1122 | int phy_get_eee_err(struct phy_device *phydev) | |
1123 | { | |
25149ef9 FF |
1124 | if (!phydev->drv) |
1125 | return -EIO; | |
1126 | ||
a6d99fcd | 1127 | return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR); |
a59a4d19 GC |
1128 | } |
1129 | EXPORT_SYMBOL(phy_get_eee_err); | |
1130 | ||
1131 | /** | |
1132 | * phy_ethtool_get_eee - get EEE supported and status | |
1133 | * @phydev: target phy_device struct | |
1134 | * @data: ethtool_eee data | |
1135 | * | |
1136 | * Description: it reportes the Supported/Advertisement/LP Advertisement | |
1137 | * capabilities. | |
1138 | */ | |
1139 | int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data) | |
1140 | { | |
1141 | int val; | |
1142 | ||
25149ef9 FF |
1143 | if (!phydev->drv) |
1144 | return -EIO; | |
1145 | ||
a59a4d19 | 1146 | /* Get Supported EEE */ |
a6d99fcd | 1147 | val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); |
a59a4d19 GC |
1148 | if (val < 0) |
1149 | return val; | |
b32607dd | 1150 | data->supported = mmd_eee_cap_to_ethtool_sup_t(val); |
a59a4d19 GC |
1151 | |
1152 | /* Get advertisement EEE */ | |
a6d99fcd | 1153 | val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); |
a59a4d19 GC |
1154 | if (val < 0) |
1155 | return val; | |
b32607dd | 1156 | data->advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
d1420bb9 | 1157 | data->eee_enabled = !!data->advertised; |
a59a4d19 GC |
1158 | |
1159 | /* Get LP advertisement EEE */ | |
a6d99fcd | 1160 | val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE); |
a59a4d19 GC |
1161 | if (val < 0) |
1162 | return val; | |
b32607dd | 1163 | data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
a59a4d19 | 1164 | |
d1420bb9 HK |
1165 | data->eee_active = !!(data->advertised & data->lp_advertised); |
1166 | ||
a59a4d19 GC |
1167 | return 0; |
1168 | } | |
1169 | EXPORT_SYMBOL(phy_ethtool_get_eee); | |
1170 | ||
1171 | /** | |
1172 | * phy_ethtool_set_eee - set EEE supported and status | |
1173 | * @phydev: target phy_device struct | |
1174 | * @data: ethtool_eee data | |
1175 | * | |
1176 | * Description: it is to program the Advertisement EEE register. | |
1177 | */ | |
1178 | int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) | |
1179 | { | |
d1420bb9 | 1180 | int cap, old_adv, adv = 0, ret; |
a59a4d19 | 1181 | |
25149ef9 FF |
1182 | if (!phydev->drv) |
1183 | return -EIO; | |
1184 | ||
83ea067f RK |
1185 | /* Get Supported EEE */ |
1186 | cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); | |
1187 | if (cap < 0) | |
1188 | return cap; | |
d853d145 | 1189 | |
f75abeb8 RK |
1190 | old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); |
1191 | if (old_adv < 0) | |
1192 | return old_adv; | |
1193 | ||
d1420bb9 HK |
1194 | if (data->eee_enabled) { |
1195 | adv = !data->advertised ? cap : | |
1196 | ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap; | |
1197 | /* Mask prohibited EEE modes */ | |
1198 | adv &= ~phydev->eee_broken_modes; | |
1199 | } | |
83ea067f | 1200 | |
f75abeb8 RK |
1201 | if (old_adv != adv) { |
1202 | ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv); | |
1203 | if (ret < 0) | |
1204 | return ret; | |
1205 | ||
1206 | /* Restart autonegotiation so the new modes get sent to the | |
1207 | * link partner. | |
1208 | */ | |
002ba705 | 1209 | ret = phy_restart_aneg(phydev); |
f75abeb8 RK |
1210 | if (ret < 0) |
1211 | return ret; | |
1212 | } | |
1213 | ||
1214 | return 0; | |
a59a4d19 GC |
1215 | } |
1216 | EXPORT_SYMBOL(phy_ethtool_set_eee); | |
42e836eb MS |
1217 | |
1218 | int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) | |
1219 | { | |
25149ef9 | 1220 | if (phydev->drv && phydev->drv->set_wol) |
42e836eb MS |
1221 | return phydev->drv->set_wol(phydev, wol); |
1222 | ||
1223 | return -EOPNOTSUPP; | |
1224 | } | |
1225 | EXPORT_SYMBOL(phy_ethtool_set_wol); | |
1226 | ||
1227 | void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) | |
1228 | { | |
25149ef9 | 1229 | if (phydev->drv && phydev->drv->get_wol) |
42e836eb MS |
1230 | phydev->drv->get_wol(phydev, wol); |
1231 | } | |
1232 | EXPORT_SYMBOL(phy_ethtool_get_wol); | |
9d9a77ce PR |
1233 | |
1234 | int phy_ethtool_get_link_ksettings(struct net_device *ndev, | |
1235 | struct ethtool_link_ksettings *cmd) | |
1236 | { | |
1237 | struct phy_device *phydev = ndev->phydev; | |
1238 | ||
1239 | if (!phydev) | |
1240 | return -ENODEV; | |
1241 | ||
5514174f | 1242 | phy_ethtool_ksettings_get(phydev, cmd); |
1243 | ||
1244 | return 0; | |
9d9a77ce PR |
1245 | } |
1246 | EXPORT_SYMBOL(phy_ethtool_get_link_ksettings); | |
1247 | ||
1248 | int phy_ethtool_set_link_ksettings(struct net_device *ndev, | |
1249 | const struct ethtool_link_ksettings *cmd) | |
1250 | { | |
1251 | struct phy_device *phydev = ndev->phydev; | |
1252 | ||
1253 | if (!phydev) | |
1254 | return -ENODEV; | |
1255 | ||
1256 | return phy_ethtool_ksettings_set(phydev, cmd); | |
1257 | } | |
1258 | EXPORT_SYMBOL(phy_ethtool_set_link_ksettings); | |
e86a8987 FF |
1259 | |
1260 | int phy_ethtool_nway_reset(struct net_device *ndev) | |
1261 | { | |
1262 | struct phy_device *phydev = ndev->phydev; | |
1263 | ||
1264 | if (!phydev) | |
1265 | return -ENODEV; | |
1266 | ||
25149ef9 FF |
1267 | if (!phydev->drv) |
1268 | return -EIO; | |
1269 | ||
002ba705 | 1270 | return phy_restart_aneg(phydev); |
e86a8987 FF |
1271 | } |
1272 | EXPORT_SYMBOL(phy_ethtool_nway_reset); |