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1// SPDX-License-Identifier: GPL-2.0+
2/* Framework for configuring and reading PHY devices
3 * Based on code in sungem_phy.c and gianfar_phy.c
4 *
5 * Author: Andy Fleming
6 *
7 * Copyright (c) 2004 Freescale Semiconductor, Inc.
8 * Copyright (c) 2006, 2007 Maciej W. Rozycki
9 */
10
11#include <linux/kernel.h>
12#include <linux/string.h>
13#include <linux/errno.h>
14#include <linux/unistd.h>
15#include <linux/interrupt.h>
16#include <linux/delay.h>
17#include <linux/netdevice.h>
18#include <linux/netlink.h>
19#include <linux/etherdevice.h>
20#include <linux/skbuff.h>
21#include <linux/mm.h>
22#include <linux/module.h>
23#include <linux/mii.h>
24#include <linux/ethtool.h>
25#include <linux/ethtool_netlink.h>
26#include <linux/phy.h>
27#include <linux/phy_led_triggers.h>
28#include <linux/sfp.h>
29#include <linux/workqueue.h>
30#include <linux/mdio.h>
31#include <linux/io.h>
32#include <linux/uaccess.h>
33#include <linux/atomic.h>
34#include <linux/suspend.h>
35#include <net/netlink.h>
36#include <net/genetlink.h>
37#include <net/sock.h>
38
39#define PHY_STATE_TIME HZ
40
41#define PHY_STATE_STR(_state) \
42 case PHY_##_state: \
43 return __stringify(_state); \
44
45static const char *phy_state_to_str(enum phy_state st)
46{
47 switch (st) {
48 PHY_STATE_STR(DOWN)
49 PHY_STATE_STR(READY)
50 PHY_STATE_STR(UP)
51 PHY_STATE_STR(RUNNING)
52 PHY_STATE_STR(NOLINK)
53 PHY_STATE_STR(CABLETEST)
54 PHY_STATE_STR(HALTED)
55 PHY_STATE_STR(ERROR)
56 }
57
58 return NULL;
59}
60
61static void phy_process_state_change(struct phy_device *phydev,
62 enum phy_state old_state)
63{
64 if (old_state != phydev->state) {
65 phydev_dbg(phydev, "PHY state change %s -> %s\n",
66 phy_state_to_str(old_state),
67 phy_state_to_str(phydev->state));
68 if (phydev->drv && phydev->drv->link_change_notify)
69 phydev->drv->link_change_notify(phydev);
70 }
71}
72
73static void phy_link_up(struct phy_device *phydev)
74{
75 phydev->phy_link_change(phydev, true);
76 phy_led_trigger_change_speed(phydev);
77}
78
79static void phy_link_down(struct phy_device *phydev)
80{
81 phydev->phy_link_change(phydev, false);
82 phy_led_trigger_change_speed(phydev);
83 WRITE_ONCE(phydev->link_down_events, phydev->link_down_events + 1);
84}
85
86static const char *phy_pause_str(struct phy_device *phydev)
87{
88 bool local_pause, local_asym_pause;
89
90 if (phydev->autoneg == AUTONEG_DISABLE)
91 goto no_pause;
92
93 local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
94 phydev->advertising);
95 local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
96 phydev->advertising);
97
98 if (local_pause && phydev->pause)
99 return "rx/tx";
100
101 if (local_asym_pause && phydev->asym_pause) {
102 if (local_pause)
103 return "rx";
104 if (phydev->pause)
105 return "tx";
106 }
107
108no_pause:
109 return "off";
110}
111
112/**
113 * phy_print_status - Convenience function to print out the current phy status
114 * @phydev: the phy_device struct
115 */
116void phy_print_status(struct phy_device *phydev)
117{
118 if (phydev->link) {
119 netdev_info(phydev->attached_dev,
120 "Link is Up - %s/%s %s- flow control %s\n",
121 phy_speed_to_str(phydev->speed),
122 phy_duplex_to_str(phydev->duplex),
123 phydev->downshifted_rate ? "(downshifted) " : "",
124 phy_pause_str(phydev));
125 } else {
126 netdev_info(phydev->attached_dev, "Link is Down\n");
127 }
128}
129EXPORT_SYMBOL(phy_print_status);
130
131/**
132 * phy_get_rate_matching - determine if rate matching is supported
133 * @phydev: The phy device to return rate matching for
134 * @iface: The interface mode to use
135 *
136 * This determines the type of rate matching (if any) that @phy supports
137 * using @iface. @iface may be %PHY_INTERFACE_MODE_NA to determine if any
138 * interface supports rate matching.
139 *
140 * Return: The type of rate matching @phy supports for @iface, or
141 * %RATE_MATCH_NONE.
142 */
143int phy_get_rate_matching(struct phy_device *phydev,
144 phy_interface_t iface)
145{
146 int ret = RATE_MATCH_NONE;
147
148 if (phydev->drv->get_rate_matching) {
149 mutex_lock(&phydev->lock);
150 ret = phydev->drv->get_rate_matching(phydev, iface);
151 mutex_unlock(&phydev->lock);
152 }
153
154 return ret;
155}
156EXPORT_SYMBOL_GPL(phy_get_rate_matching);
157
158/**
159 * phy_config_interrupt - configure the PHY device for the requested interrupts
160 * @phydev: the phy_device struct
161 * @interrupts: interrupt flags to configure for this @phydev
162 *
163 * Returns 0 on success or < 0 on error.
164 */
165static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
166{
167 phydev->interrupts = interrupts ? 1 : 0;
168 if (phydev->drv->config_intr)
169 return phydev->drv->config_intr(phydev);
170
171 return 0;
172}
173
174/**
175 * phy_restart_aneg - restart auto-negotiation
176 * @phydev: target phy_device struct
177 *
178 * Restart the autonegotiation on @phydev. Returns >= 0 on success or
179 * negative errno on error.
180 */
181int phy_restart_aneg(struct phy_device *phydev)
182{
183 int ret;
184
185 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
186 ret = genphy_c45_restart_aneg(phydev);
187 else
188 ret = genphy_restart_aneg(phydev);
189
190 return ret;
191}
192EXPORT_SYMBOL_GPL(phy_restart_aneg);
193
194/**
195 * phy_aneg_done - return auto-negotiation status
196 * @phydev: target phy_device struct
197 *
198 * Description: Return the auto-negotiation status from this @phydev
199 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
200 * is still pending.
201 */
202int phy_aneg_done(struct phy_device *phydev)
203{
204 if (phydev->drv && phydev->drv->aneg_done)
205 return phydev->drv->aneg_done(phydev);
206 else if (phydev->is_c45)
207 return genphy_c45_aneg_done(phydev);
208 else
209 return genphy_aneg_done(phydev);
210}
211EXPORT_SYMBOL(phy_aneg_done);
212
213/**
214 * phy_find_valid - find a PHY setting that matches the requested parameters
215 * @speed: desired speed
216 * @duplex: desired duplex
217 * @supported: mask of supported link modes
218 *
219 * Locate a supported phy setting that is, in priority order:
220 * - an exact match for the specified speed and duplex mode
221 * - a match for the specified speed, or slower speed
222 * - the slowest supported speed
223 * Returns the matched phy_setting entry, or %NULL if no supported phy
224 * settings were found.
225 */
226static const struct phy_setting *
227phy_find_valid(int speed, int duplex, unsigned long *supported)
228{
229 return phy_lookup_setting(speed, duplex, supported, false);
230}
231
232/**
233 * phy_supported_speeds - return all speeds currently supported by a phy device
234 * @phy: The phy device to return supported speeds of.
235 * @speeds: buffer to store supported speeds in.
236 * @size: size of speeds buffer.
237 *
238 * Description: Returns the number of supported speeds, and fills the speeds
239 * buffer with the supported speeds. If speeds buffer is too small to contain
240 * all currently supported speeds, will return as many speeds as can fit.
241 */
242unsigned int phy_supported_speeds(struct phy_device *phy,
243 unsigned int *speeds,
244 unsigned int size)
245{
246 return phy_speeds(speeds, size, phy->supported);
247}
248
249/**
250 * phy_check_valid - check if there is a valid PHY setting which matches
251 * speed, duplex, and feature mask
252 * @speed: speed to match
253 * @duplex: duplex to match
254 * @features: A mask of the valid settings
255 *
256 * Description: Returns true if there is a valid setting, false otherwise.
257 */
258bool phy_check_valid(int speed, int duplex, unsigned long *features)
259{
260 return !!phy_lookup_setting(speed, duplex, features, true);
261}
262EXPORT_SYMBOL(phy_check_valid);
263
264/**
265 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
266 * @phydev: the target phy_device struct
267 *
268 * Description: Make sure the PHY is set to supported speeds and
269 * duplexes. Drop down by one in this order: 1000/FULL,
270 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
271 */
272static void phy_sanitize_settings(struct phy_device *phydev)
273{
274 const struct phy_setting *setting;
275
276 setting = phy_find_valid(phydev->speed, phydev->duplex,
277 phydev->supported);
278 if (setting) {
279 phydev->speed = setting->speed;
280 phydev->duplex = setting->duplex;
281 } else {
282 /* We failed to find anything (no supported speeds?) */
283 phydev->speed = SPEED_UNKNOWN;
284 phydev->duplex = DUPLEX_UNKNOWN;
285 }
286}
287
288void phy_ethtool_ksettings_get(struct phy_device *phydev,
289 struct ethtool_link_ksettings *cmd)
290{
291 mutex_lock(&phydev->lock);
292 linkmode_copy(cmd->link_modes.supported, phydev->supported);
293 linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
294 linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
295
296 cmd->base.speed = phydev->speed;
297 cmd->base.duplex = phydev->duplex;
298 cmd->base.master_slave_cfg = phydev->master_slave_get;
299 cmd->base.master_slave_state = phydev->master_slave_state;
300 cmd->base.rate_matching = phydev->rate_matching;
301 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
302 cmd->base.port = PORT_BNC;
303 else
304 cmd->base.port = phydev->port;
305 cmd->base.transceiver = phy_is_internal(phydev) ?
306 XCVR_INTERNAL : XCVR_EXTERNAL;
307 cmd->base.phy_address = phydev->mdio.addr;
308 cmd->base.autoneg = phydev->autoneg;
309 cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
310 cmd->base.eth_tp_mdix = phydev->mdix;
311 mutex_unlock(&phydev->lock);
312}
313EXPORT_SYMBOL(phy_ethtool_ksettings_get);
314
315/**
316 * phy_mii_ioctl - generic PHY MII ioctl interface
317 * @phydev: the phy_device struct
318 * @ifr: &struct ifreq for socket ioctl's
319 * @cmd: ioctl cmd to execute
320 *
321 * Note that this function is currently incompatible with the
322 * PHYCONTROL layer. It changes registers without regard to
323 * current state. Use at own risk.
324 */
325int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
326{
327 struct mii_ioctl_data *mii_data = if_mii(ifr);
328 struct kernel_hwtstamp_config kernel_cfg;
329 struct netlink_ext_ack extack = {};
330 u16 val = mii_data->val_in;
331 bool change_autoneg = false;
332 struct hwtstamp_config cfg;
333 int prtad, devad;
334 int ret;
335
336 switch (cmd) {
337 case SIOCGMIIPHY:
338 mii_data->phy_id = phydev->mdio.addr;
339 fallthrough;
340
341 case SIOCGMIIREG:
342 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
343 prtad = mdio_phy_id_prtad(mii_data->phy_id);
344 devad = mdio_phy_id_devad(mii_data->phy_id);
345 mii_data->val_out = mdiobus_c45_read(
346 phydev->mdio.bus, prtad, devad,
347 mii_data->reg_num);
348 } else {
349 mii_data->val_out = mdiobus_read(
350 phydev->mdio.bus, mii_data->phy_id,
351 mii_data->reg_num);
352 }
353 return 0;
354
355 case SIOCSMIIREG:
356 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
357 prtad = mdio_phy_id_prtad(mii_data->phy_id);
358 devad = mdio_phy_id_devad(mii_data->phy_id);
359 } else {
360 prtad = mii_data->phy_id;
361 devad = mii_data->reg_num;
362 }
363 if (prtad == phydev->mdio.addr) {
364 switch (devad) {
365 case MII_BMCR:
366 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
367 if (phydev->autoneg == AUTONEG_ENABLE)
368 change_autoneg = true;
369 phydev->autoneg = AUTONEG_DISABLE;
370 if (val & BMCR_FULLDPLX)
371 phydev->duplex = DUPLEX_FULL;
372 else
373 phydev->duplex = DUPLEX_HALF;
374 if (val & BMCR_SPEED1000)
375 phydev->speed = SPEED_1000;
376 else if (val & BMCR_SPEED100)
377 phydev->speed = SPEED_100;
378 else phydev->speed = SPEED_10;
379 } else {
380 if (phydev->autoneg == AUTONEG_DISABLE)
381 change_autoneg = true;
382 phydev->autoneg = AUTONEG_ENABLE;
383 }
384 break;
385 case MII_ADVERTISE:
386 mii_adv_mod_linkmode_adv_t(phydev->advertising,
387 val);
388 change_autoneg = true;
389 break;
390 case MII_CTRL1000:
391 mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
392 val);
393 change_autoneg = true;
394 break;
395 default:
396 /* do nothing */
397 break;
398 }
399 }
400
401 if (mdio_phy_id_is_c45(mii_data->phy_id))
402 mdiobus_c45_write(phydev->mdio.bus, prtad, devad,
403 mii_data->reg_num, val);
404 else
405 mdiobus_write(phydev->mdio.bus, prtad, devad, val);
406
407 if (prtad == phydev->mdio.addr &&
408 devad == MII_BMCR &&
409 val & BMCR_RESET)
410 return phy_init_hw(phydev);
411
412 if (change_autoneg)
413 return phy_start_aneg(phydev);
414
415 return 0;
416
417 case SIOCSHWTSTAMP:
418 if (phydev->mii_ts && phydev->mii_ts->hwtstamp) {
419 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
420 return -EFAULT;
421
422 hwtstamp_config_to_kernel(&kernel_cfg, &cfg);
423 ret = phydev->mii_ts->hwtstamp(phydev->mii_ts, &kernel_cfg, &extack);
424 if (ret)
425 return ret;
426
427 hwtstamp_config_from_kernel(&cfg, &kernel_cfg);
428 if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)))
429 return -EFAULT;
430
431 return 0;
432 }
433 fallthrough;
434
435 default:
436 return -EOPNOTSUPP;
437 }
438}
439EXPORT_SYMBOL(phy_mii_ioctl);
440
441/**
442 * phy_do_ioctl - generic ndo_eth_ioctl implementation
443 * @dev: the net_device struct
444 * @ifr: &struct ifreq for socket ioctl's
445 * @cmd: ioctl cmd to execute
446 */
447int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
448{
449 if (!dev->phydev)
450 return -ENODEV;
451
452 return phy_mii_ioctl(dev->phydev, ifr, cmd);
453}
454EXPORT_SYMBOL(phy_do_ioctl);
455
456/**
457 * phy_do_ioctl_running - generic ndo_eth_ioctl implementation but test first
458 *
459 * @dev: the net_device struct
460 * @ifr: &struct ifreq for socket ioctl's
461 * @cmd: ioctl cmd to execute
462 *
463 * Same as phy_do_ioctl, but ensures that net_device is running before
464 * handling the ioctl.
465 */
466int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd)
467{
468 if (!netif_running(dev))
469 return -ENODEV;
470
471 return phy_do_ioctl(dev, ifr, cmd);
472}
473EXPORT_SYMBOL(phy_do_ioctl_running);
474
475/**
476 * __phy_hwtstamp_get - Get hardware timestamping configuration from PHY
477 *
478 * @phydev: the PHY device structure
479 * @config: structure holding the timestamping configuration
480 *
481 * Query the PHY device for its current hardware timestamping configuration.
482 */
483int __phy_hwtstamp_get(struct phy_device *phydev,
484 struct kernel_hwtstamp_config *config)
485{
486 if (!phydev)
487 return -ENODEV;
488
489 return -EOPNOTSUPP;
490}
491
492/**
493 * __phy_hwtstamp_set - Modify PHY hardware timestamping configuration
494 *
495 * @phydev: the PHY device structure
496 * @config: structure holding the timestamping configuration
497 * @extack: netlink extended ack structure, for error reporting
498 */
499int __phy_hwtstamp_set(struct phy_device *phydev,
500 struct kernel_hwtstamp_config *config,
501 struct netlink_ext_ack *extack)
502{
503 if (!phydev)
504 return -ENODEV;
505
506 if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
507 return phydev->mii_ts->hwtstamp(phydev->mii_ts, config, extack);
508
509 return -EOPNOTSUPP;
510}
511
512/**
513 * phy_queue_state_machine - Trigger the state machine to run soon
514 *
515 * @phydev: the phy_device struct
516 * @jiffies: Run the state machine after these jiffies
517 */
518void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
519{
520 mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
521 jiffies);
522}
523EXPORT_SYMBOL(phy_queue_state_machine);
524
525/**
526 * phy_trigger_machine - Trigger the state machine to run now
527 *
528 * @phydev: the phy_device struct
529 */
530void phy_trigger_machine(struct phy_device *phydev)
531{
532 phy_queue_state_machine(phydev, 0);
533}
534EXPORT_SYMBOL(phy_trigger_machine);
535
536static void phy_abort_cable_test(struct phy_device *phydev)
537{
538 int err;
539
540 ethnl_cable_test_finished(phydev);
541
542 err = phy_init_hw(phydev);
543 if (err)
544 phydev_err(phydev, "Error while aborting cable test");
545}
546
547/**
548 * phy_ethtool_get_strings - Get the statistic counter names
549 *
550 * @phydev: the phy_device struct
551 * @data: Where to put the strings
552 */
553int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data)
554{
555 if (!phydev->drv)
556 return -EIO;
557
558 mutex_lock(&phydev->lock);
559 phydev->drv->get_strings(phydev, data);
560 mutex_unlock(&phydev->lock);
561
562 return 0;
563}
564EXPORT_SYMBOL(phy_ethtool_get_strings);
565
566/**
567 * phy_ethtool_get_sset_count - Get the number of statistic counters
568 *
569 * @phydev: the phy_device struct
570 */
571int phy_ethtool_get_sset_count(struct phy_device *phydev)
572{
573 int ret;
574
575 if (!phydev->drv)
576 return -EIO;
577
578 if (phydev->drv->get_sset_count &&
579 phydev->drv->get_strings &&
580 phydev->drv->get_stats) {
581 mutex_lock(&phydev->lock);
582 ret = phydev->drv->get_sset_count(phydev);
583 mutex_unlock(&phydev->lock);
584
585 return ret;
586 }
587
588 return -EOPNOTSUPP;
589}
590EXPORT_SYMBOL(phy_ethtool_get_sset_count);
591
592/**
593 * phy_ethtool_get_stats - Get the statistic counters
594 *
595 * @phydev: the phy_device struct
596 * @stats: What counters to get
597 * @data: Where to store the counters
598 */
599int phy_ethtool_get_stats(struct phy_device *phydev,
600 struct ethtool_stats *stats, u64 *data)
601{
602 if (!phydev->drv)
603 return -EIO;
604
605 mutex_lock(&phydev->lock);
606 phydev->drv->get_stats(phydev, stats, data);
607 mutex_unlock(&phydev->lock);
608
609 return 0;
610}
611EXPORT_SYMBOL(phy_ethtool_get_stats);
612
613/**
614 * phy_ethtool_get_plca_cfg - Get PLCA RS configuration
615 * @phydev: the phy_device struct
616 * @plca_cfg: where to store the retrieved configuration
617 *
618 * Retrieve the PLCA configuration from the PHY. Return 0 on success or a
619 * negative value if an error occurred.
620 */
621int phy_ethtool_get_plca_cfg(struct phy_device *phydev,
622 struct phy_plca_cfg *plca_cfg)
623{
624 int ret;
625
626 if (!phydev->drv) {
627 ret = -EIO;
628 goto out;
629 }
630
631 if (!phydev->drv->get_plca_cfg) {
632 ret = -EOPNOTSUPP;
633 goto out;
634 }
635
636 mutex_lock(&phydev->lock);
637 ret = phydev->drv->get_plca_cfg(phydev, plca_cfg);
638
639 mutex_unlock(&phydev->lock);
640out:
641 return ret;
642}
643
644/**
645 * plca_check_valid - Check PLCA configuration before enabling
646 * @phydev: the phy_device struct
647 * @plca_cfg: current PLCA configuration
648 * @extack: extack for reporting useful error messages
649 *
650 * Checks whether the PLCA and PHY configuration are consistent and it is safe
651 * to enable PLCA. Returns 0 on success or a negative value if the PLCA or PHY
652 * configuration is not consistent.
653 */
654static int plca_check_valid(struct phy_device *phydev,
655 const struct phy_plca_cfg *plca_cfg,
656 struct netlink_ext_ack *extack)
657{
658 int ret = 0;
659
660 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT,
661 phydev->advertising)) {
662 ret = -EOPNOTSUPP;
663 NL_SET_ERR_MSG(extack,
664 "Point to Multi-Point mode is not enabled");
665 } else if (plca_cfg->node_id >= 255) {
666 NL_SET_ERR_MSG(extack, "PLCA node ID is not set");
667 ret = -EINVAL;
668 }
669
670 return ret;
671}
672
673/**
674 * phy_ethtool_set_plca_cfg - Set PLCA RS configuration
675 * @phydev: the phy_device struct
676 * @plca_cfg: new PLCA configuration to apply
677 * @extack: extack for reporting useful error messages
678 *
679 * Sets the PLCA configuration in the PHY. Return 0 on success or a
680 * negative value if an error occurred.
681 */
682int phy_ethtool_set_plca_cfg(struct phy_device *phydev,
683 const struct phy_plca_cfg *plca_cfg,
684 struct netlink_ext_ack *extack)
685{
686 struct phy_plca_cfg *curr_plca_cfg;
687 int ret;
688
689 if (!phydev->drv) {
690 ret = -EIO;
691 goto out;
692 }
693
694 if (!phydev->drv->set_plca_cfg ||
695 !phydev->drv->get_plca_cfg) {
696 ret = -EOPNOTSUPP;
697 goto out;
698 }
699
700 curr_plca_cfg = kmalloc(sizeof(*curr_plca_cfg), GFP_KERNEL);
701 if (!curr_plca_cfg) {
702 ret = -ENOMEM;
703 goto out;
704 }
705
706 mutex_lock(&phydev->lock);
707
708 ret = phydev->drv->get_plca_cfg(phydev, curr_plca_cfg);
709 if (ret)
710 goto out_drv;
711
712 if (curr_plca_cfg->enabled < 0 && plca_cfg->enabled >= 0) {
713 NL_SET_ERR_MSG(extack,
714 "PHY does not support changing the PLCA 'enable' attribute");
715 ret = -EINVAL;
716 goto out_drv;
717 }
718
719 if (curr_plca_cfg->node_id < 0 && plca_cfg->node_id >= 0) {
720 NL_SET_ERR_MSG(extack,
721 "PHY does not support changing the PLCA 'local node ID' attribute");
722 ret = -EINVAL;
723 goto out_drv;
724 }
725
726 if (curr_plca_cfg->node_cnt < 0 && plca_cfg->node_cnt >= 0) {
727 NL_SET_ERR_MSG(extack,
728 "PHY does not support changing the PLCA 'node count' attribute");
729 ret = -EINVAL;
730 goto out_drv;
731 }
732
733 if (curr_plca_cfg->to_tmr < 0 && plca_cfg->to_tmr >= 0) {
734 NL_SET_ERR_MSG(extack,
735 "PHY does not support changing the PLCA 'TO timer' attribute");
736 ret = -EINVAL;
737 goto out_drv;
738 }
739
740 if (curr_plca_cfg->burst_cnt < 0 && plca_cfg->burst_cnt >= 0) {
741 NL_SET_ERR_MSG(extack,
742 "PHY does not support changing the PLCA 'burst count' attribute");
743 ret = -EINVAL;
744 goto out_drv;
745 }
746
747 if (curr_plca_cfg->burst_tmr < 0 && plca_cfg->burst_tmr >= 0) {
748 NL_SET_ERR_MSG(extack,
749 "PHY does not support changing the PLCA 'burst timer' attribute");
750 ret = -EINVAL;
751 goto out_drv;
752 }
753
754 // if enabling PLCA, perform a few sanity checks
755 if (plca_cfg->enabled > 0) {
756 // allow setting node_id concurrently with enabled
757 if (plca_cfg->node_id >= 0)
758 curr_plca_cfg->node_id = plca_cfg->node_id;
759
760 ret = plca_check_valid(phydev, curr_plca_cfg, extack);
761 if (ret)
762 goto out_drv;
763 }
764
765 ret = phydev->drv->set_plca_cfg(phydev, plca_cfg);
766
767out_drv:
768 kfree(curr_plca_cfg);
769 mutex_unlock(&phydev->lock);
770out:
771 return ret;
772}
773
774/**
775 * phy_ethtool_get_plca_status - Get PLCA RS status information
776 * @phydev: the phy_device struct
777 * @plca_st: where to store the retrieved status information
778 *
779 * Retrieve the PLCA status information from the PHY. Return 0 on success or a
780 * negative value if an error occurred.
781 */
782int phy_ethtool_get_plca_status(struct phy_device *phydev,
783 struct phy_plca_status *plca_st)
784{
785 int ret;
786
787 if (!phydev->drv) {
788 ret = -EIO;
789 goto out;
790 }
791
792 if (!phydev->drv->get_plca_status) {
793 ret = -EOPNOTSUPP;
794 goto out;
795 }
796
797 mutex_lock(&phydev->lock);
798 ret = phydev->drv->get_plca_status(phydev, plca_st);
799
800 mutex_unlock(&phydev->lock);
801out:
802 return ret;
803}
804
805/**
806 * phy_start_cable_test - Start a cable test
807 *
808 * @phydev: the phy_device struct
809 * @extack: extack for reporting useful error messages
810 */
811int phy_start_cable_test(struct phy_device *phydev,
812 struct netlink_ext_ack *extack)
813{
814 struct net_device *dev = phydev->attached_dev;
815 int err = -ENOMEM;
816
817 if (!(phydev->drv &&
818 phydev->drv->cable_test_start &&
819 phydev->drv->cable_test_get_status)) {
820 NL_SET_ERR_MSG(extack,
821 "PHY driver does not support cable testing");
822 return -EOPNOTSUPP;
823 }
824
825 mutex_lock(&phydev->lock);
826 if (phydev->state == PHY_CABLETEST) {
827 NL_SET_ERR_MSG(extack,
828 "PHY already performing a test");
829 err = -EBUSY;
830 goto out;
831 }
832
833 if (phydev->state < PHY_UP ||
834 phydev->state > PHY_CABLETEST) {
835 NL_SET_ERR_MSG(extack,
836 "PHY not configured. Try setting interface up");
837 err = -EBUSY;
838 goto out;
839 }
840
841 err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
842 if (err)
843 goto out;
844
845 /* Mark the carrier down until the test is complete */
846 phy_link_down(phydev);
847
848 netif_testing_on(dev);
849 err = phydev->drv->cable_test_start(phydev);
850 if (err) {
851 netif_testing_off(dev);
852 phy_link_up(phydev);
853 goto out_free;
854 }
855
856 phydev->state = PHY_CABLETEST;
857
858 if (phy_polling_mode(phydev))
859 phy_trigger_machine(phydev);
860
861 mutex_unlock(&phydev->lock);
862
863 return 0;
864
865out_free:
866 ethnl_cable_test_free(phydev);
867out:
868 mutex_unlock(&phydev->lock);
869
870 return err;
871}
872EXPORT_SYMBOL(phy_start_cable_test);
873
874/**
875 * phy_start_cable_test_tdr - Start a raw TDR cable test
876 *
877 * @phydev: the phy_device struct
878 * @extack: extack for reporting useful error messages
879 * @config: Configuration of the test to run
880 */
881int phy_start_cable_test_tdr(struct phy_device *phydev,
882 struct netlink_ext_ack *extack,
883 const struct phy_tdr_config *config)
884{
885 struct net_device *dev = phydev->attached_dev;
886 int err = -ENOMEM;
887
888 if (!(phydev->drv &&
889 phydev->drv->cable_test_tdr_start &&
890 phydev->drv->cable_test_get_status)) {
891 NL_SET_ERR_MSG(extack,
892 "PHY driver does not support cable test TDR");
893 return -EOPNOTSUPP;
894 }
895
896 mutex_lock(&phydev->lock);
897 if (phydev->state == PHY_CABLETEST) {
898 NL_SET_ERR_MSG(extack,
899 "PHY already performing a test");
900 err = -EBUSY;
901 goto out;
902 }
903
904 if (phydev->state < PHY_UP ||
905 phydev->state > PHY_CABLETEST) {
906 NL_SET_ERR_MSG(extack,
907 "PHY not configured. Try setting interface up");
908 err = -EBUSY;
909 goto out;
910 }
911
912 err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
913 if (err)
914 goto out;
915
916 /* Mark the carrier down until the test is complete */
917 phy_link_down(phydev);
918
919 netif_testing_on(dev);
920 err = phydev->drv->cable_test_tdr_start(phydev, config);
921 if (err) {
922 netif_testing_off(dev);
923 phy_link_up(phydev);
924 goto out_free;
925 }
926
927 phydev->state = PHY_CABLETEST;
928
929 if (phy_polling_mode(phydev))
930 phy_trigger_machine(phydev);
931
932 mutex_unlock(&phydev->lock);
933
934 return 0;
935
936out_free:
937 ethnl_cable_test_free(phydev);
938out:
939 mutex_unlock(&phydev->lock);
940
941 return err;
942}
943EXPORT_SYMBOL(phy_start_cable_test_tdr);
944
945int phy_config_aneg(struct phy_device *phydev)
946{
947 if (phydev->drv->config_aneg)
948 return phydev->drv->config_aneg(phydev);
949
950 /* Clause 45 PHYs that don't implement Clause 22 registers are not
951 * allowed to call genphy_config_aneg()
952 */
953 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
954 return genphy_c45_config_aneg(phydev);
955
956 return genphy_config_aneg(phydev);
957}
958EXPORT_SYMBOL(phy_config_aneg);
959
960/**
961 * phy_check_link_status - check link status and set state accordingly
962 * @phydev: the phy_device struct
963 *
964 * Description: Check for link and whether autoneg was triggered / is running
965 * and set state accordingly
966 */
967static int phy_check_link_status(struct phy_device *phydev)
968{
969 int err;
970
971 lockdep_assert_held(&phydev->lock);
972
973 /* Keep previous state if loopback is enabled because some PHYs
974 * report that Link is Down when loopback is enabled.
975 */
976 if (phydev->loopback_enabled)
977 return 0;
978
979 err = phy_read_status(phydev);
980 if (err)
981 return err;
982
983 if (phydev->link && phydev->state != PHY_RUNNING) {
984 phy_check_downshift(phydev);
985 phydev->state = PHY_RUNNING;
986 phy_link_up(phydev);
987 } else if (!phydev->link && phydev->state != PHY_NOLINK) {
988 phydev->state = PHY_NOLINK;
989 phy_link_down(phydev);
990 }
991
992 return 0;
993}
994
995/**
996 * _phy_start_aneg - start auto-negotiation for this PHY device
997 * @phydev: the phy_device struct
998 *
999 * Description: Sanitizes the settings (if we're not autonegotiating
1000 * them), and then calls the driver's config_aneg function.
1001 * If the PHYCONTROL Layer is operating, we change the state to
1002 * reflect the beginning of Auto-negotiation or forcing.
1003 */
1004int _phy_start_aneg(struct phy_device *phydev)
1005{
1006 int err;
1007
1008 lockdep_assert_held(&phydev->lock);
1009
1010 if (!phydev->drv)
1011 return -EIO;
1012
1013 if (AUTONEG_DISABLE == phydev->autoneg)
1014 phy_sanitize_settings(phydev);
1015
1016 err = phy_config_aneg(phydev);
1017 if (err < 0)
1018 return err;
1019
1020 if (phy_is_started(phydev))
1021 err = phy_check_link_status(phydev);
1022
1023 return err;
1024}
1025EXPORT_SYMBOL(_phy_start_aneg);
1026
1027/**
1028 * phy_start_aneg - start auto-negotiation for this PHY device
1029 * @phydev: the phy_device struct
1030 *
1031 * Description: Sanitizes the settings (if we're not autonegotiating
1032 * them), and then calls the driver's config_aneg function.
1033 * If the PHYCONTROL Layer is operating, we change the state to
1034 * reflect the beginning of Auto-negotiation or forcing.
1035 */
1036int phy_start_aneg(struct phy_device *phydev)
1037{
1038 int err;
1039
1040 mutex_lock(&phydev->lock);
1041 err = _phy_start_aneg(phydev);
1042 mutex_unlock(&phydev->lock);
1043
1044 return err;
1045}
1046EXPORT_SYMBOL(phy_start_aneg);
1047
1048static int phy_poll_aneg_done(struct phy_device *phydev)
1049{
1050 unsigned int retries = 100;
1051 int ret;
1052
1053 do {
1054 msleep(100);
1055 ret = phy_aneg_done(phydev);
1056 } while (!ret && --retries);
1057
1058 if (!ret)
1059 return -ETIMEDOUT;
1060
1061 return ret < 0 ? ret : 0;
1062}
1063
1064int phy_ethtool_ksettings_set(struct phy_device *phydev,
1065 const struct ethtool_link_ksettings *cmd)
1066{
1067 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
1068 u8 autoneg = cmd->base.autoneg;
1069 u8 duplex = cmd->base.duplex;
1070 u32 speed = cmd->base.speed;
1071
1072 if (cmd->base.phy_address != phydev->mdio.addr)
1073 return -EINVAL;
1074
1075 linkmode_copy(advertising, cmd->link_modes.advertising);
1076
1077 /* We make sure that we don't pass unsupported values in to the PHY */
1078 linkmode_and(advertising, advertising, phydev->supported);
1079
1080 /* Verify the settings we care about. */
1081 if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
1082 return -EINVAL;
1083
1084 if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
1085 return -EINVAL;
1086
1087 if (autoneg == AUTONEG_DISABLE &&
1088 ((speed != SPEED_1000 &&
1089 speed != SPEED_100 &&
1090 speed != SPEED_10) ||
1091 (duplex != DUPLEX_HALF &&
1092 duplex != DUPLEX_FULL)))
1093 return -EINVAL;
1094
1095 mutex_lock(&phydev->lock);
1096 phydev->autoneg = autoneg;
1097
1098 if (autoneg == AUTONEG_DISABLE) {
1099 phydev->speed = speed;
1100 phydev->duplex = duplex;
1101 }
1102
1103 linkmode_copy(phydev->advertising, advertising);
1104
1105 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
1106 phydev->advertising, autoneg == AUTONEG_ENABLE);
1107
1108 phydev->master_slave_set = cmd->base.master_slave_cfg;
1109 phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
1110
1111 /* Restart the PHY */
1112 if (phy_is_started(phydev)) {
1113 phydev->state = PHY_UP;
1114 phy_trigger_machine(phydev);
1115 } else {
1116 _phy_start_aneg(phydev);
1117 }
1118
1119 mutex_unlock(&phydev->lock);
1120 return 0;
1121}
1122EXPORT_SYMBOL(phy_ethtool_ksettings_set);
1123
1124/**
1125 * phy_speed_down - set speed to lowest speed supported by both link partners
1126 * @phydev: the phy_device struct
1127 * @sync: perform action synchronously
1128 *
1129 * Description: Typically used to save energy when waiting for a WoL packet
1130 *
1131 * WARNING: Setting sync to false may cause the system being unable to suspend
1132 * in case the PHY generates an interrupt when finishing the autonegotiation.
1133 * This interrupt may wake up the system immediately after suspend.
1134 * Therefore use sync = false only if you're sure it's safe with the respective
1135 * network chip.
1136 */
1137int phy_speed_down(struct phy_device *phydev, bool sync)
1138{
1139 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
1140 int ret = 0;
1141
1142 mutex_lock(&phydev->lock);
1143
1144 if (phydev->autoneg != AUTONEG_ENABLE)
1145 goto out;
1146
1147 linkmode_copy(adv_tmp, phydev->advertising);
1148
1149 ret = phy_speed_down_core(phydev);
1150 if (ret)
1151 goto out;
1152
1153 linkmode_copy(phydev->adv_old, adv_tmp);
1154
1155 if (linkmode_equal(phydev->advertising, adv_tmp)) {
1156 ret = 0;
1157 goto out;
1158 }
1159
1160 ret = phy_config_aneg(phydev);
1161 if (ret)
1162 goto out;
1163
1164 ret = sync ? phy_poll_aneg_done(phydev) : 0;
1165out:
1166 mutex_unlock(&phydev->lock);
1167
1168 return ret;
1169}
1170EXPORT_SYMBOL_GPL(phy_speed_down);
1171
1172/**
1173 * phy_speed_up - (re)set advertised speeds to all supported speeds
1174 * @phydev: the phy_device struct
1175 *
1176 * Description: Used to revert the effect of phy_speed_down
1177 */
1178int phy_speed_up(struct phy_device *phydev)
1179{
1180 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
1181 int ret = 0;
1182
1183 mutex_lock(&phydev->lock);
1184
1185 if (phydev->autoneg != AUTONEG_ENABLE)
1186 goto out;
1187
1188 if (linkmode_empty(phydev->adv_old))
1189 goto out;
1190
1191 linkmode_copy(adv_tmp, phydev->advertising);
1192 linkmode_copy(phydev->advertising, phydev->adv_old);
1193 linkmode_zero(phydev->adv_old);
1194
1195 if (linkmode_equal(phydev->advertising, adv_tmp))
1196 goto out;
1197
1198 ret = phy_config_aneg(phydev);
1199out:
1200 mutex_unlock(&phydev->lock);
1201
1202 return ret;
1203}
1204EXPORT_SYMBOL_GPL(phy_speed_up);
1205
1206/**
1207 * phy_start_machine - start PHY state machine tracking
1208 * @phydev: the phy_device struct
1209 *
1210 * Description: The PHY infrastructure can run a state machine
1211 * which tracks whether the PHY is starting up, negotiating,
1212 * etc. This function starts the delayed workqueue which tracks
1213 * the state of the PHY. If you want to maintain your own state machine,
1214 * do not call this function.
1215 */
1216void phy_start_machine(struct phy_device *phydev)
1217{
1218 phy_trigger_machine(phydev);
1219}
1220EXPORT_SYMBOL_GPL(phy_start_machine);
1221
1222/**
1223 * phy_stop_machine - stop the PHY state machine tracking
1224 * @phydev: target phy_device struct
1225 *
1226 * Description: Stops the state machine delayed workqueue, sets the
1227 * state to UP (unless it wasn't up yet). This function must be
1228 * called BEFORE phy_detach.
1229 */
1230void phy_stop_machine(struct phy_device *phydev)
1231{
1232 cancel_delayed_work_sync(&phydev->state_queue);
1233
1234 mutex_lock(&phydev->lock);
1235 if (phy_is_started(phydev))
1236 phydev->state = PHY_UP;
1237 mutex_unlock(&phydev->lock);
1238}
1239
1240static void phy_process_error(struct phy_device *phydev)
1241{
1242 /* phydev->lock must be held for the state change to be safe */
1243 if (!mutex_is_locked(&phydev->lock))
1244 phydev_err(phydev, "PHY-device data unsafe context\n");
1245
1246 phydev->state = PHY_ERROR;
1247
1248 phy_trigger_machine(phydev);
1249}
1250
1251static void phy_error_precise(struct phy_device *phydev,
1252 const void *func, int err)
1253{
1254 WARN(1, "%pS: returned: %d\n", func, err);
1255 phy_process_error(phydev);
1256}
1257
1258/**
1259 * phy_error - enter ERROR state for this PHY device
1260 * @phydev: target phy_device struct
1261 *
1262 * Moves the PHY to the ERROR state in response to a read
1263 * or write error, and tells the controller the link is down.
1264 * Must be called with phydev->lock held.
1265 */
1266void phy_error(struct phy_device *phydev)
1267{
1268 WARN_ON(1);
1269 phy_process_error(phydev);
1270}
1271EXPORT_SYMBOL(phy_error);
1272
1273/**
1274 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
1275 * @phydev: target phy_device struct
1276 */
1277int phy_disable_interrupts(struct phy_device *phydev)
1278{
1279 /* Disable PHY interrupts */
1280 return phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
1281}
1282
1283/**
1284 * phy_interrupt - PHY interrupt handler
1285 * @irq: interrupt line
1286 * @phy_dat: phy_device pointer
1287 *
1288 * Description: Handle PHY interrupt
1289 */
1290static irqreturn_t phy_interrupt(int irq, void *phy_dat)
1291{
1292 struct phy_device *phydev = phy_dat;
1293 struct phy_driver *drv = phydev->drv;
1294 irqreturn_t ret;
1295
1296 /* Wakeup interrupts may occur during a system sleep transition.
1297 * Postpone handling until the PHY has resumed.
1298 */
1299 if (IS_ENABLED(CONFIG_PM_SLEEP) && phydev->irq_suspended) {
1300 struct net_device *netdev = phydev->attached_dev;
1301
1302 if (netdev) {
1303 struct device *parent = netdev->dev.parent;
1304
1305 if (netdev->wol_enabled)
1306 pm_system_wakeup();
1307 else if (device_may_wakeup(&netdev->dev))
1308 pm_wakeup_dev_event(&netdev->dev, 0, true);
1309 else if (parent && device_may_wakeup(parent))
1310 pm_wakeup_dev_event(parent, 0, true);
1311 }
1312
1313 phydev->irq_rerun = 1;
1314 disable_irq_nosync(irq);
1315 return IRQ_HANDLED;
1316 }
1317
1318 mutex_lock(&phydev->lock);
1319 ret = drv->handle_interrupt(phydev);
1320 mutex_unlock(&phydev->lock);
1321
1322 return ret;
1323}
1324
1325/**
1326 * phy_enable_interrupts - Enable the interrupts from the PHY side
1327 * @phydev: target phy_device struct
1328 */
1329static int phy_enable_interrupts(struct phy_device *phydev)
1330{
1331 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
1332}
1333
1334/**
1335 * phy_request_interrupt - request and enable interrupt for a PHY device
1336 * @phydev: target phy_device struct
1337 *
1338 * Description: Request and enable the interrupt for the given PHY.
1339 * If this fails, then we set irq to PHY_POLL.
1340 * This should only be called with a valid IRQ number.
1341 */
1342void phy_request_interrupt(struct phy_device *phydev)
1343{
1344 int err;
1345
1346 err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
1347 IRQF_ONESHOT | IRQF_SHARED,
1348 phydev_name(phydev), phydev);
1349 if (err) {
1350 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
1351 err, phydev->irq);
1352 phydev->irq = PHY_POLL;
1353 } else {
1354 if (phy_enable_interrupts(phydev)) {
1355 phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
1356 phy_free_interrupt(phydev);
1357 phydev->irq = PHY_POLL;
1358 }
1359 }
1360}
1361EXPORT_SYMBOL(phy_request_interrupt);
1362
1363/**
1364 * phy_free_interrupt - disable and free interrupt for a PHY device
1365 * @phydev: target phy_device struct
1366 *
1367 * Description: Disable and free the interrupt for the given PHY.
1368 * This should only be called with a valid IRQ number.
1369 */
1370void phy_free_interrupt(struct phy_device *phydev)
1371{
1372 phy_disable_interrupts(phydev);
1373 free_irq(phydev->irq, phydev);
1374}
1375EXPORT_SYMBOL(phy_free_interrupt);
1376
1377enum phy_state_work {
1378 PHY_STATE_WORK_NONE,
1379 PHY_STATE_WORK_ANEG,
1380 PHY_STATE_WORK_SUSPEND,
1381};
1382
1383static enum phy_state_work _phy_state_machine(struct phy_device *phydev)
1384{
1385 enum phy_state_work state_work = PHY_STATE_WORK_NONE;
1386 struct net_device *dev = phydev->attached_dev;
1387 enum phy_state old_state = phydev->state;
1388 const void *func = NULL;
1389 bool finished = false;
1390 int err = 0;
1391
1392 switch (phydev->state) {
1393 case PHY_DOWN:
1394 case PHY_READY:
1395 break;
1396 case PHY_UP:
1397 state_work = PHY_STATE_WORK_ANEG;
1398 break;
1399 case PHY_NOLINK:
1400 case PHY_RUNNING:
1401 err = phy_check_link_status(phydev);
1402 func = &phy_check_link_status;
1403 break;
1404 case PHY_CABLETEST:
1405 err = phydev->drv->cable_test_get_status(phydev, &finished);
1406 if (err) {
1407 phy_abort_cable_test(phydev);
1408 netif_testing_off(dev);
1409 state_work = PHY_STATE_WORK_ANEG;
1410 phydev->state = PHY_UP;
1411 break;
1412 }
1413
1414 if (finished) {
1415 ethnl_cable_test_finished(phydev);
1416 netif_testing_off(dev);
1417 state_work = PHY_STATE_WORK_ANEG;
1418 phydev->state = PHY_UP;
1419 }
1420 break;
1421 case PHY_HALTED:
1422 case PHY_ERROR:
1423 if (phydev->link) {
1424 phydev->link = 0;
1425 phy_link_down(phydev);
1426 }
1427 state_work = PHY_STATE_WORK_SUSPEND;
1428 break;
1429 }
1430
1431 if (state_work == PHY_STATE_WORK_ANEG) {
1432 err = _phy_start_aneg(phydev);
1433 func = &_phy_start_aneg;
1434 }
1435
1436 if (err == -ENODEV)
1437 return state_work;
1438
1439 if (err < 0)
1440 phy_error_precise(phydev, func, err);
1441
1442 phy_process_state_change(phydev, old_state);
1443
1444 /* Only re-schedule a PHY state machine change if we are polling the
1445 * PHY, if PHY_MAC_INTERRUPT is set, then we will be moving
1446 * between states from phy_mac_interrupt().
1447 *
1448 * In state PHY_HALTED the PHY gets suspended, so rescheduling the
1449 * state machine would be pointless and possibly error prone when
1450 * called from phy_disconnect() synchronously.
1451 */
1452 if (phy_polling_mode(phydev) && phy_is_started(phydev))
1453 phy_queue_state_machine(phydev, PHY_STATE_TIME);
1454
1455 return state_work;
1456}
1457
1458/* unlocked part of the PHY state machine */
1459static void _phy_state_machine_post_work(struct phy_device *phydev,
1460 enum phy_state_work state_work)
1461{
1462 if (state_work == PHY_STATE_WORK_SUSPEND)
1463 phy_suspend(phydev);
1464}
1465
1466/**
1467 * phy_state_machine - Handle the state machine
1468 * @work: work_struct that describes the work to be done
1469 */
1470void phy_state_machine(struct work_struct *work)
1471{
1472 struct delayed_work *dwork = to_delayed_work(work);
1473 struct phy_device *phydev =
1474 container_of(dwork, struct phy_device, state_queue);
1475 enum phy_state_work state_work;
1476
1477 mutex_lock(&phydev->lock);
1478 state_work = _phy_state_machine(phydev);
1479 mutex_unlock(&phydev->lock);
1480
1481 _phy_state_machine_post_work(phydev, state_work);
1482}
1483
1484/**
1485 * phy_stop - Bring down the PHY link, and stop checking the status
1486 * @phydev: target phy_device struct
1487 */
1488void phy_stop(struct phy_device *phydev)
1489{
1490 struct net_device *dev = phydev->attached_dev;
1491 enum phy_state_work state_work;
1492 enum phy_state old_state;
1493
1494 if (!phy_is_started(phydev) && phydev->state != PHY_DOWN &&
1495 phydev->state != PHY_ERROR) {
1496 WARN(1, "called from state %s\n",
1497 phy_state_to_str(phydev->state));
1498 return;
1499 }
1500
1501 mutex_lock(&phydev->lock);
1502 old_state = phydev->state;
1503
1504 if (phydev->state == PHY_CABLETEST) {
1505 phy_abort_cable_test(phydev);
1506 netif_testing_off(dev);
1507 }
1508
1509 if (phydev->sfp_bus)
1510 sfp_upstream_stop(phydev->sfp_bus);
1511
1512 phydev->state = PHY_HALTED;
1513 phy_process_state_change(phydev, old_state);
1514
1515 state_work = _phy_state_machine(phydev);
1516 mutex_unlock(&phydev->lock);
1517
1518 _phy_state_machine_post_work(phydev, state_work);
1519 phy_stop_machine(phydev);
1520
1521 /* Cannot call flush_scheduled_work() here as desired because
1522 * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
1523 * will not reenable interrupts.
1524 */
1525}
1526EXPORT_SYMBOL(phy_stop);
1527
1528/**
1529 * phy_start - start or restart a PHY device
1530 * @phydev: target phy_device struct
1531 *
1532 * Description: Indicates the attached device's readiness to
1533 * handle PHY-related work. Used during startup to start the
1534 * PHY, and after a call to phy_stop() to resume operation.
1535 * Also used to indicate the MDIO bus has cleared an error
1536 * condition.
1537 */
1538void phy_start(struct phy_device *phydev)
1539{
1540 mutex_lock(&phydev->lock);
1541
1542 if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
1543 WARN(1, "called from state %s\n",
1544 phy_state_to_str(phydev->state));
1545 goto out;
1546 }
1547
1548 if (phydev->sfp_bus)
1549 sfp_upstream_start(phydev->sfp_bus);
1550
1551 /* if phy was suspended, bring the physical link up again */
1552 __phy_resume(phydev);
1553
1554 phydev->state = PHY_UP;
1555
1556 phy_start_machine(phydev);
1557out:
1558 mutex_unlock(&phydev->lock);
1559}
1560EXPORT_SYMBOL(phy_start);
1561
1562/**
1563 * phy_mac_interrupt - MAC says the link has changed
1564 * @phydev: phy_device struct with changed link
1565 *
1566 * The MAC layer is able to indicate there has been a change in the PHY link
1567 * status. Trigger the state machine and work a work queue.
1568 */
1569void phy_mac_interrupt(struct phy_device *phydev)
1570{
1571 /* Trigger a state machine change */
1572 phy_trigger_machine(phydev);
1573}
1574EXPORT_SYMBOL(phy_mac_interrupt);
1575
1576/**
1577 * phy_init_eee - init and check the EEE feature
1578 * @phydev: target phy_device struct
1579 * @clk_stop_enable: PHY may stop the clock during LPI
1580 *
1581 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1582 * is supported by looking at the MMD registers 3.20 and 7.60/61
1583 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1584 * bit if required.
1585 */
1586int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1587{
1588 int ret;
1589
1590 if (!phydev->drv)
1591 return -EIO;
1592
1593 ret = genphy_c45_eee_is_active(phydev, NULL, NULL, NULL);
1594 if (ret < 0)
1595 return ret;
1596 if (!ret)
1597 return -EPROTONOSUPPORT;
1598
1599 if (clk_stop_enable)
1600 /* Configure the PHY to stop receiving xMII
1601 * clock while it is signaling LPI.
1602 */
1603 ret = phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
1604 MDIO_PCS_CTRL1_CLKSTOP_EN);
1605
1606 return ret < 0 ? ret : 0;
1607}
1608EXPORT_SYMBOL(phy_init_eee);
1609
1610/**
1611 * phy_get_eee_err - report the EEE wake error count
1612 * @phydev: target phy_device struct
1613 *
1614 * Description: it is to report the number of time where the PHY
1615 * failed to complete its normal wake sequence.
1616 */
1617int phy_get_eee_err(struct phy_device *phydev)
1618{
1619 int ret;
1620
1621 if (!phydev->drv)
1622 return -EIO;
1623
1624 mutex_lock(&phydev->lock);
1625 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1626 mutex_unlock(&phydev->lock);
1627
1628 return ret;
1629}
1630EXPORT_SYMBOL(phy_get_eee_err);
1631
1632/**
1633 * phy_ethtool_get_eee - get EEE supported and status
1634 * @phydev: target phy_device struct
1635 * @data: ethtool_eee data
1636 *
1637 * Description: it reportes the Supported/Advertisement/LP Advertisement
1638 * capabilities.
1639 */
1640int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1641{
1642 int ret;
1643
1644 if (!phydev->drv)
1645 return -EIO;
1646
1647 mutex_lock(&phydev->lock);
1648 ret = genphy_c45_ethtool_get_eee(phydev, data);
1649 mutex_unlock(&phydev->lock);
1650
1651 return ret;
1652}
1653EXPORT_SYMBOL(phy_ethtool_get_eee);
1654
1655/**
1656 * phy_ethtool_set_eee - set EEE supported and status
1657 * @phydev: target phy_device struct
1658 * @data: ethtool_eee data
1659 *
1660 * Description: it is to program the Advertisement EEE register.
1661 */
1662int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1663{
1664 int ret;
1665
1666 if (!phydev->drv)
1667 return -EIO;
1668
1669 mutex_lock(&phydev->lock);
1670 ret = genphy_c45_ethtool_set_eee(phydev, data);
1671 mutex_unlock(&phydev->lock);
1672
1673 return ret;
1674}
1675EXPORT_SYMBOL(phy_ethtool_set_eee);
1676
1677/**
1678 * phy_ethtool_set_wol - Configure Wake On LAN
1679 *
1680 * @phydev: target phy_device struct
1681 * @wol: Configuration requested
1682 */
1683int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1684{
1685 int ret;
1686
1687 if (phydev->drv && phydev->drv->set_wol) {
1688 mutex_lock(&phydev->lock);
1689 ret = phydev->drv->set_wol(phydev, wol);
1690 mutex_unlock(&phydev->lock);
1691
1692 return ret;
1693 }
1694
1695 return -EOPNOTSUPP;
1696}
1697EXPORT_SYMBOL(phy_ethtool_set_wol);
1698
1699/**
1700 * phy_ethtool_get_wol - Get the current Wake On LAN configuration
1701 *
1702 * @phydev: target phy_device struct
1703 * @wol: Store the current configuration here
1704 */
1705void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1706{
1707 if (phydev->drv && phydev->drv->get_wol) {
1708 mutex_lock(&phydev->lock);
1709 phydev->drv->get_wol(phydev, wol);
1710 mutex_unlock(&phydev->lock);
1711 }
1712}
1713EXPORT_SYMBOL(phy_ethtool_get_wol);
1714
1715int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1716 struct ethtool_link_ksettings *cmd)
1717{
1718 struct phy_device *phydev = ndev->phydev;
1719
1720 if (!phydev)
1721 return -ENODEV;
1722
1723 phy_ethtool_ksettings_get(phydev, cmd);
1724
1725 return 0;
1726}
1727EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1728
1729int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1730 const struct ethtool_link_ksettings *cmd)
1731{
1732 struct phy_device *phydev = ndev->phydev;
1733
1734 if (!phydev)
1735 return -ENODEV;
1736
1737 return phy_ethtool_ksettings_set(phydev, cmd);
1738}
1739EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1740
1741/**
1742 * phy_ethtool_nway_reset - Restart auto negotiation
1743 * @ndev: Network device to restart autoneg for
1744 */
1745int phy_ethtool_nway_reset(struct net_device *ndev)
1746{
1747 struct phy_device *phydev = ndev->phydev;
1748 int ret;
1749
1750 if (!phydev)
1751 return -ENODEV;
1752
1753 if (!phydev->drv)
1754 return -EIO;
1755
1756 mutex_lock(&phydev->lock);
1757 ret = phy_restart_aneg(phydev);
1758 mutex_unlock(&phydev->lock);
1759
1760 return ret;
1761}
1762EXPORT_SYMBOL(phy_ethtool_nway_reset);
1/* Framework for configuring and reading PHY devices
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.
7 * Copyright (c) 2006, 2007 Maciej W. Rozycki
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 */
15
16#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17
18#include <linux/kernel.h>
19#include <linux/string.h>
20#include <linux/errno.h>
21#include <linux/unistd.h>
22#include <linux/interrupt.h>
23#include <linux/delay.h>
24#include <linux/netdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/skbuff.h>
27#include <linux/mm.h>
28#include <linux/module.h>
29#include <linux/mii.h>
30#include <linux/ethtool.h>
31#include <linux/phy.h>
32#include <linux/timer.h>
33#include <linux/workqueue.h>
34#include <linux/mdio.h>
35#include <linux/io.h>
36#include <linux/uaccess.h>
37#include <linux/atomic.h>
38
39#include <asm/irq.h>
40
41static const char *phy_speed_to_str(int speed)
42{
43 switch (speed) {
44 case SPEED_10:
45 return "10Mbps";
46 case SPEED_100:
47 return "100Mbps";
48 case SPEED_1000:
49 return "1Gbps";
50 case SPEED_2500:
51 return "2.5Gbps";
52 case SPEED_10000:
53 return "10Gbps";
54 case SPEED_UNKNOWN:
55 return "Unknown";
56 default:
57 return "Unsupported (update phy.c)";
58 }
59}
60
61#define PHY_STATE_STR(_state) \
62 case PHY_##_state: \
63 return __stringify(_state); \
64
65static const char *phy_state_to_str(enum phy_state st)
66{
67 switch (st) {
68 PHY_STATE_STR(DOWN)
69 PHY_STATE_STR(STARTING)
70 PHY_STATE_STR(READY)
71 PHY_STATE_STR(PENDING)
72 PHY_STATE_STR(UP)
73 PHY_STATE_STR(AN)
74 PHY_STATE_STR(RUNNING)
75 PHY_STATE_STR(NOLINK)
76 PHY_STATE_STR(FORCING)
77 PHY_STATE_STR(CHANGELINK)
78 PHY_STATE_STR(HALTED)
79 PHY_STATE_STR(RESUMING)
80 }
81
82 return NULL;
83}
84
85
86/**
87 * phy_print_status - Convenience function to print out the current phy status
88 * @phydev: the phy_device struct
89 */
90void phy_print_status(struct phy_device *phydev)
91{
92 if (phydev->link) {
93 netdev_info(phydev->attached_dev,
94 "Link is Up - %s/%s - flow control %s\n",
95 phy_speed_to_str(phydev->speed),
96 DUPLEX_FULL == phydev->duplex ? "Full" : "Half",
97 phydev->pause ? "rx/tx" : "off");
98 } else {
99 netdev_info(phydev->attached_dev, "Link is Down\n");
100 }
101}
102EXPORT_SYMBOL(phy_print_status);
103
104/**
105 * phy_clear_interrupt - Ack the phy device's interrupt
106 * @phydev: the phy_device struct
107 *
108 * If the @phydev driver has an ack_interrupt function, call it to
109 * ack and clear the phy device's interrupt.
110 *
111 * Returns 0 on success or < 0 on error.
112 */
113static int phy_clear_interrupt(struct phy_device *phydev)
114{
115 if (phydev->drv->ack_interrupt)
116 return phydev->drv->ack_interrupt(phydev);
117
118 return 0;
119}
120
121/**
122 * phy_config_interrupt - configure the PHY device for the requested interrupts
123 * @phydev: the phy_device struct
124 * @interrupts: interrupt flags to configure for this @phydev
125 *
126 * Returns 0 on success or < 0 on error.
127 */
128static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
129{
130 phydev->interrupts = interrupts;
131 if (phydev->drv->config_intr)
132 return phydev->drv->config_intr(phydev);
133
134 return 0;
135}
136
137
138/**
139 * phy_aneg_done - return auto-negotiation status
140 * @phydev: target phy_device struct
141 *
142 * Description: Return the auto-negotiation status from this @phydev
143 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
144 * is still pending.
145 */
146static inline int phy_aneg_done(struct phy_device *phydev)
147{
148 if (phydev->drv->aneg_done)
149 return phydev->drv->aneg_done(phydev);
150
151 return genphy_aneg_done(phydev);
152}
153
154/* A structure for mapping a particular speed and duplex
155 * combination to a particular SUPPORTED and ADVERTISED value
156 */
157struct phy_setting {
158 int speed;
159 int duplex;
160 u32 setting;
161};
162
163/* A mapping of all SUPPORTED settings to speed/duplex */
164static const struct phy_setting settings[] = {
165 {
166 .speed = SPEED_10000,
167 .duplex = DUPLEX_FULL,
168 .setting = SUPPORTED_10000baseKR_Full,
169 },
170 {
171 .speed = SPEED_10000,
172 .duplex = DUPLEX_FULL,
173 .setting = SUPPORTED_10000baseKX4_Full,
174 },
175 {
176 .speed = SPEED_10000,
177 .duplex = DUPLEX_FULL,
178 .setting = SUPPORTED_10000baseT_Full,
179 },
180 {
181 .speed = SPEED_2500,
182 .duplex = DUPLEX_FULL,
183 .setting = SUPPORTED_2500baseX_Full,
184 },
185 {
186 .speed = SPEED_1000,
187 .duplex = DUPLEX_FULL,
188 .setting = SUPPORTED_1000baseKX_Full,
189 },
190 {
191 .speed = SPEED_1000,
192 .duplex = DUPLEX_FULL,
193 .setting = SUPPORTED_1000baseT_Full,
194 },
195 {
196 .speed = SPEED_1000,
197 .duplex = DUPLEX_HALF,
198 .setting = SUPPORTED_1000baseT_Half,
199 },
200 {
201 .speed = SPEED_100,
202 .duplex = DUPLEX_FULL,
203 .setting = SUPPORTED_100baseT_Full,
204 },
205 {
206 .speed = SPEED_100,
207 .duplex = DUPLEX_HALF,
208 .setting = SUPPORTED_100baseT_Half,
209 },
210 {
211 .speed = SPEED_10,
212 .duplex = DUPLEX_FULL,
213 .setting = SUPPORTED_10baseT_Full,
214 },
215 {
216 .speed = SPEED_10,
217 .duplex = DUPLEX_HALF,
218 .setting = SUPPORTED_10baseT_Half,
219 },
220};
221
222#define MAX_NUM_SETTINGS ARRAY_SIZE(settings)
223
224/**
225 * phy_find_setting - find a PHY settings array entry that matches speed & duplex
226 * @speed: speed to match
227 * @duplex: duplex to match
228 *
229 * Description: Searches the settings array for the setting which
230 * matches the desired speed and duplex, and returns the index
231 * of that setting. Returns the index of the last setting if
232 * none of the others match.
233 */
234static inline unsigned int phy_find_setting(int speed, int duplex)
235{
236 unsigned int idx = 0;
237
238 while (idx < ARRAY_SIZE(settings) &&
239 (settings[idx].speed != speed || settings[idx].duplex != duplex))
240 idx++;
241
242 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
243}
244
245/**
246 * phy_find_valid - find a PHY setting that matches the requested features mask
247 * @idx: The first index in settings[] to search
248 * @features: A mask of the valid settings
249 *
250 * Description: Returns the index of the first valid setting less
251 * than or equal to the one pointed to by idx, as determined by
252 * the mask in features. Returns the index of the last setting
253 * if nothing else matches.
254 */
255static inline unsigned int phy_find_valid(unsigned int idx, u32 features)
256{
257 while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
258 idx++;
259
260 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
261}
262
263/**
264 * phy_check_valid - check if there is a valid PHY setting which matches
265 * speed, duplex, and feature mask
266 * @speed: speed to match
267 * @duplex: duplex to match
268 * @features: A mask of the valid settings
269 *
270 * Description: Returns true if there is a valid setting, false otherwise.
271 */
272static inline bool phy_check_valid(int speed, int duplex, u32 features)
273{
274 unsigned int idx;
275
276 idx = phy_find_valid(phy_find_setting(speed, duplex), features);
277
278 return settings[idx].speed == speed && settings[idx].duplex == duplex &&
279 (settings[idx].setting & features);
280}
281
282/**
283 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
284 * @phydev: the target phy_device struct
285 *
286 * Description: Make sure the PHY is set to supported speeds and
287 * duplexes. Drop down by one in this order: 1000/FULL,
288 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
289 */
290static void phy_sanitize_settings(struct phy_device *phydev)
291{
292 u32 features = phydev->supported;
293 unsigned int idx;
294
295 /* Sanitize settings based on PHY capabilities */
296 if ((features & SUPPORTED_Autoneg) == 0)
297 phydev->autoneg = AUTONEG_DISABLE;
298
299 idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
300 features);
301
302 phydev->speed = settings[idx].speed;
303 phydev->duplex = settings[idx].duplex;
304}
305
306/**
307 * phy_ethtool_sset - generic ethtool sset function, handles all the details
308 * @phydev: target phy_device struct
309 * @cmd: ethtool_cmd
310 *
311 * A few notes about parameter checking:
312 * - We don't set port or transceiver, so we don't care what they
313 * were set to.
314 * - phy_start_aneg() will make sure forced settings are sane, and
315 * choose the next best ones from the ones selected, so we don't
316 * care if ethtool tries to give us bad values.
317 */
318int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
319{
320 u32 speed = ethtool_cmd_speed(cmd);
321
322 if (cmd->phy_address != phydev->mdio.addr)
323 return -EINVAL;
324
325 /* We make sure that we don't pass unsupported values in to the PHY */
326 cmd->advertising &= phydev->supported;
327
328 /* Verify the settings we care about. */
329 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
330 return -EINVAL;
331
332 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
333 return -EINVAL;
334
335 if (cmd->autoneg == AUTONEG_DISABLE &&
336 ((speed != SPEED_1000 &&
337 speed != SPEED_100 &&
338 speed != SPEED_10) ||
339 (cmd->duplex != DUPLEX_HALF &&
340 cmd->duplex != DUPLEX_FULL)))
341 return -EINVAL;
342
343 phydev->autoneg = cmd->autoneg;
344
345 phydev->speed = speed;
346
347 phydev->advertising = cmd->advertising;
348
349 if (AUTONEG_ENABLE == cmd->autoneg)
350 phydev->advertising |= ADVERTISED_Autoneg;
351 else
352 phydev->advertising &= ~ADVERTISED_Autoneg;
353
354 phydev->duplex = cmd->duplex;
355
356 phydev->mdix = cmd->eth_tp_mdix_ctrl;
357
358 /* Restart the PHY */
359 phy_start_aneg(phydev);
360
361 return 0;
362}
363EXPORT_SYMBOL(phy_ethtool_sset);
364
365int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
366{
367 cmd->supported = phydev->supported;
368
369 cmd->advertising = phydev->advertising;
370 cmd->lp_advertising = phydev->lp_advertising;
371
372 ethtool_cmd_speed_set(cmd, phydev->speed);
373 cmd->duplex = phydev->duplex;
374 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
375 cmd->port = PORT_BNC;
376 else
377 cmd->port = PORT_MII;
378 cmd->phy_address = phydev->mdio.addr;
379 cmd->transceiver = phy_is_internal(phydev) ?
380 XCVR_INTERNAL : XCVR_EXTERNAL;
381 cmd->autoneg = phydev->autoneg;
382 cmd->eth_tp_mdix_ctrl = phydev->mdix;
383
384 return 0;
385}
386EXPORT_SYMBOL(phy_ethtool_gset);
387
388/**
389 * phy_mii_ioctl - generic PHY MII ioctl interface
390 * @phydev: the phy_device struct
391 * @ifr: &struct ifreq for socket ioctl's
392 * @cmd: ioctl cmd to execute
393 *
394 * Note that this function is currently incompatible with the
395 * PHYCONTROL layer. It changes registers without regard to
396 * current state. Use at own risk.
397 */
398int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
399{
400 struct mii_ioctl_data *mii_data = if_mii(ifr);
401 u16 val = mii_data->val_in;
402 bool change_autoneg = false;
403
404 switch (cmd) {
405 case SIOCGMIIPHY:
406 mii_data->phy_id = phydev->mdio.addr;
407 /* fall through */
408
409 case SIOCGMIIREG:
410 mii_data->val_out = mdiobus_read(phydev->mdio.bus,
411 mii_data->phy_id,
412 mii_data->reg_num);
413 return 0;
414
415 case SIOCSMIIREG:
416 if (mii_data->phy_id == phydev->mdio.addr) {
417 switch (mii_data->reg_num) {
418 case MII_BMCR:
419 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
420 if (phydev->autoneg == AUTONEG_ENABLE)
421 change_autoneg = true;
422 phydev->autoneg = AUTONEG_DISABLE;
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;
436 phydev->autoneg = AUTONEG_ENABLE;
437 }
438 break;
439 case MII_ADVERTISE:
440 phydev->advertising = mii_adv_to_ethtool_adv_t(val);
441 change_autoneg = true;
442 break;
443 default:
444 /* do nothing */
445 break;
446 }
447 }
448
449 mdiobus_write(phydev->mdio.bus, mii_data->phy_id,
450 mii_data->reg_num, val);
451
452 if (mii_data->phy_id == phydev->mdio.addr &&
453 mii_data->reg_num == MII_BMCR &&
454 val & BMCR_RESET)
455 return phy_init_hw(phydev);
456
457 if (change_autoneg)
458 return phy_start_aneg(phydev);
459
460 return 0;
461
462 case SIOCSHWTSTAMP:
463 if (phydev->drv->hwtstamp)
464 return phydev->drv->hwtstamp(phydev, ifr);
465 /* fall through */
466
467 default:
468 return -EOPNOTSUPP;
469 }
470}
471EXPORT_SYMBOL(phy_mii_ioctl);
472
473/**
474 * phy_start_aneg - start auto-negotiation for this PHY device
475 * @phydev: the phy_device struct
476 *
477 * Description: Sanitizes the settings (if we're not autonegotiating
478 * them), and then calls the driver's config_aneg function.
479 * If the PHYCONTROL Layer is operating, we change the state to
480 * reflect the beginning of Auto-negotiation or forcing.
481 */
482int phy_start_aneg(struct phy_device *phydev)
483{
484 int err;
485
486 mutex_lock(&phydev->lock);
487
488 if (AUTONEG_DISABLE == phydev->autoneg)
489 phy_sanitize_settings(phydev);
490
491 /* Invalidate LP advertising flags */
492 phydev->lp_advertising = 0;
493
494 err = phydev->drv->config_aneg(phydev);
495 if (err < 0)
496 goto out_unlock;
497
498 if (phydev->state != PHY_HALTED) {
499 if (AUTONEG_ENABLE == phydev->autoneg) {
500 phydev->state = PHY_AN;
501 phydev->link_timeout = PHY_AN_TIMEOUT;
502 } else {
503 phydev->state = PHY_FORCING;
504 phydev->link_timeout = PHY_FORCE_TIMEOUT;
505 }
506 }
507
508out_unlock:
509 mutex_unlock(&phydev->lock);
510 return err;
511}
512EXPORT_SYMBOL(phy_start_aneg);
513
514/**
515 * phy_start_machine - start PHY state machine tracking
516 * @phydev: the phy_device struct
517 *
518 * Description: The PHY infrastructure can run a state machine
519 * which tracks whether the PHY is starting up, negotiating,
520 * etc. This function starts the timer which tracks the state
521 * of the PHY. If you want to maintain your own state machine,
522 * do not call this function.
523 */
524void phy_start_machine(struct phy_device *phydev)
525{
526 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
527}
528
529/**
530 * phy_stop_machine - stop the PHY state machine tracking
531 * @phydev: target phy_device struct
532 *
533 * Description: Stops the state machine timer, sets the state to UP
534 * (unless it wasn't up yet). This function must be called BEFORE
535 * phy_detach.
536 */
537void phy_stop_machine(struct phy_device *phydev)
538{
539 cancel_delayed_work_sync(&phydev->state_queue);
540
541 mutex_lock(&phydev->lock);
542 if (phydev->state > PHY_UP)
543 phydev->state = PHY_UP;
544 mutex_unlock(&phydev->lock);
545}
546
547/**
548 * phy_error - enter HALTED state for this PHY device
549 * @phydev: target phy_device struct
550 *
551 * Moves the PHY to the HALTED state in response to a read
552 * or write error, and tells the controller the link is down.
553 * Must not be called from interrupt context, or while the
554 * phydev->lock is held.
555 */
556static void phy_error(struct phy_device *phydev)
557{
558 mutex_lock(&phydev->lock);
559 phydev->state = PHY_HALTED;
560 mutex_unlock(&phydev->lock);
561}
562
563/**
564 * phy_interrupt - PHY interrupt handler
565 * @irq: interrupt line
566 * @phy_dat: phy_device pointer
567 *
568 * Description: When a PHY interrupt occurs, the handler disables
569 * interrupts, and schedules a work task to clear the interrupt.
570 */
571static irqreturn_t phy_interrupt(int irq, void *phy_dat)
572{
573 struct phy_device *phydev = phy_dat;
574
575 if (PHY_HALTED == phydev->state)
576 return IRQ_NONE; /* It can't be ours. */
577
578 /* The MDIO bus is not allowed to be written in interrupt
579 * context, so we need to disable the irq here. A work
580 * queue will write the PHY to disable and clear the
581 * interrupt, and then reenable the irq line.
582 */
583 disable_irq_nosync(irq);
584 atomic_inc(&phydev->irq_disable);
585
586 queue_work(system_power_efficient_wq, &phydev->phy_queue);
587
588 return IRQ_HANDLED;
589}
590
591/**
592 * phy_enable_interrupts - Enable the interrupts from the PHY side
593 * @phydev: target phy_device struct
594 */
595static int phy_enable_interrupts(struct phy_device *phydev)
596{
597 int err = phy_clear_interrupt(phydev);
598
599 if (err < 0)
600 return err;
601
602 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
603}
604
605/**
606 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
607 * @phydev: target phy_device struct
608 */
609static int phy_disable_interrupts(struct phy_device *phydev)
610{
611 int err;
612
613 /* Disable PHY interrupts */
614 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
615 if (err)
616 goto phy_err;
617
618 /* Clear the interrupt */
619 err = phy_clear_interrupt(phydev);
620 if (err)
621 goto phy_err;
622
623 return 0;
624
625phy_err:
626 phy_error(phydev);
627
628 return err;
629}
630
631/**
632 * phy_start_interrupts - request and enable interrupts for a PHY device
633 * @phydev: target phy_device struct
634 *
635 * Description: Request the interrupt for the given PHY.
636 * If this fails, then we set irq to PHY_POLL.
637 * Otherwise, we enable the interrupts in the PHY.
638 * This should only be called with a valid IRQ number.
639 * Returns 0 on success or < 0 on error.
640 */
641int phy_start_interrupts(struct phy_device *phydev)
642{
643 atomic_set(&phydev->irq_disable, 0);
644 if (request_irq(phydev->irq, phy_interrupt, 0, "phy_interrupt",
645 phydev) < 0) {
646 pr_warn("%s: Can't get IRQ %d (PHY)\n",
647 phydev->mdio.bus->name, phydev->irq);
648 phydev->irq = PHY_POLL;
649 return 0;
650 }
651
652 return phy_enable_interrupts(phydev);
653}
654EXPORT_SYMBOL(phy_start_interrupts);
655
656/**
657 * phy_stop_interrupts - disable interrupts from a PHY device
658 * @phydev: target phy_device struct
659 */
660int phy_stop_interrupts(struct phy_device *phydev)
661{
662 int err = phy_disable_interrupts(phydev);
663
664 if (err)
665 phy_error(phydev);
666
667 free_irq(phydev->irq, phydev);
668
669 /* Cannot call flush_scheduled_work() here as desired because
670 * of rtnl_lock(), but we do not really care about what would
671 * be done, except from enable_irq(), so cancel any work
672 * possibly pending and take care of the matter below.
673 */
674 cancel_work_sync(&phydev->phy_queue);
675 /* If work indeed has been cancelled, disable_irq() will have
676 * been left unbalanced from phy_interrupt() and enable_irq()
677 * has to be called so that other devices on the line work.
678 */
679 while (atomic_dec_return(&phydev->irq_disable) >= 0)
680 enable_irq(phydev->irq);
681
682 return err;
683}
684EXPORT_SYMBOL(phy_stop_interrupts);
685
686/**
687 * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes
688 * @work: work_struct that describes the work to be done
689 */
690void phy_change(struct work_struct *work)
691{
692 struct phy_device *phydev =
693 container_of(work, struct phy_device, phy_queue);
694
695 if (phy_interrupt_is_valid(phydev)) {
696 if (phydev->drv->did_interrupt &&
697 !phydev->drv->did_interrupt(phydev))
698 goto ignore;
699
700 if (phy_disable_interrupts(phydev))
701 goto phy_err;
702 }
703
704 mutex_lock(&phydev->lock);
705 if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
706 phydev->state = PHY_CHANGELINK;
707 mutex_unlock(&phydev->lock);
708
709 if (phy_interrupt_is_valid(phydev)) {
710 atomic_dec(&phydev->irq_disable);
711 enable_irq(phydev->irq);
712
713 /* Reenable interrupts */
714 if (PHY_HALTED != phydev->state &&
715 phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
716 goto irq_enable_err;
717 }
718
719 /* reschedule state queue work to run as soon as possible */
720 cancel_delayed_work_sync(&phydev->state_queue);
721 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
722 return;
723
724ignore:
725 atomic_dec(&phydev->irq_disable);
726 enable_irq(phydev->irq);
727 return;
728
729irq_enable_err:
730 disable_irq(phydev->irq);
731 atomic_inc(&phydev->irq_disable);
732phy_err:
733 phy_error(phydev);
734}
735
736/**
737 * phy_stop - Bring down the PHY link, and stop checking the status
738 * @phydev: target phy_device struct
739 */
740void phy_stop(struct phy_device *phydev)
741{
742 mutex_lock(&phydev->lock);
743
744 if (PHY_HALTED == phydev->state)
745 goto out_unlock;
746
747 if (phy_interrupt_is_valid(phydev)) {
748 /* Disable PHY Interrupts */
749 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
750
751 /* Clear any pending interrupts */
752 phy_clear_interrupt(phydev);
753 }
754
755 phydev->state = PHY_HALTED;
756
757out_unlock:
758 mutex_unlock(&phydev->lock);
759
760 /* Cannot call flush_scheduled_work() here as desired because
761 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
762 * will not reenable interrupts.
763 */
764}
765EXPORT_SYMBOL(phy_stop);
766
767/**
768 * phy_start - start or restart a PHY device
769 * @phydev: target phy_device struct
770 *
771 * Description: Indicates the attached device's readiness to
772 * handle PHY-related work. Used during startup to start the
773 * PHY, and after a call to phy_stop() to resume operation.
774 * Also used to indicate the MDIO bus has cleared an error
775 * condition.
776 */
777void phy_start(struct phy_device *phydev)
778{
779 bool do_resume = false;
780 int err = 0;
781
782 mutex_lock(&phydev->lock);
783
784 switch (phydev->state) {
785 case PHY_STARTING:
786 phydev->state = PHY_PENDING;
787 break;
788 case PHY_READY:
789 phydev->state = PHY_UP;
790 break;
791 case PHY_HALTED:
792 /* make sure interrupts are re-enabled for the PHY */
793 if (phydev->irq != PHY_POLL) {
794 err = phy_enable_interrupts(phydev);
795 if (err < 0)
796 break;
797 }
798
799 phydev->state = PHY_RESUMING;
800 do_resume = true;
801 break;
802 default:
803 break;
804 }
805 mutex_unlock(&phydev->lock);
806
807 /* if phy was suspended, bring the physical link up again */
808 if (do_resume)
809 phy_resume(phydev);
810}
811EXPORT_SYMBOL(phy_start);
812
813/**
814 * phy_state_machine - Handle the state machine
815 * @work: work_struct that describes the work to be done
816 */
817void phy_state_machine(struct work_struct *work)
818{
819 struct delayed_work *dwork = to_delayed_work(work);
820 struct phy_device *phydev =
821 container_of(dwork, struct phy_device, state_queue);
822 bool needs_aneg = false, do_suspend = false;
823 enum phy_state old_state;
824 int err = 0;
825 int old_link;
826
827 mutex_lock(&phydev->lock);
828
829 old_state = phydev->state;
830
831 if (phydev->drv->link_change_notify)
832 phydev->drv->link_change_notify(phydev);
833
834 switch (phydev->state) {
835 case PHY_DOWN:
836 case PHY_STARTING:
837 case PHY_READY:
838 case PHY_PENDING:
839 break;
840 case PHY_UP:
841 needs_aneg = true;
842
843 phydev->link_timeout = PHY_AN_TIMEOUT;
844
845 break;
846 case PHY_AN:
847 err = phy_read_status(phydev);
848 if (err < 0)
849 break;
850
851 /* If the link is down, give up on negotiation for now */
852 if (!phydev->link) {
853 phydev->state = PHY_NOLINK;
854 netif_carrier_off(phydev->attached_dev);
855 phydev->adjust_link(phydev->attached_dev);
856 break;
857 }
858
859 /* Check if negotiation is done. Break if there's an error */
860 err = phy_aneg_done(phydev);
861 if (err < 0)
862 break;
863
864 /* If AN is done, we're running */
865 if (err > 0) {
866 phydev->state = PHY_RUNNING;
867 netif_carrier_on(phydev->attached_dev);
868 phydev->adjust_link(phydev->attached_dev);
869
870 } else if (0 == phydev->link_timeout--)
871 needs_aneg = true;
872 break;
873 case PHY_NOLINK:
874 if (phy_interrupt_is_valid(phydev))
875 break;
876
877 err = phy_read_status(phydev);
878 if (err)
879 break;
880
881 if (phydev->link) {
882 if (AUTONEG_ENABLE == phydev->autoneg) {
883 err = phy_aneg_done(phydev);
884 if (err < 0)
885 break;
886
887 if (!err) {
888 phydev->state = PHY_AN;
889 phydev->link_timeout = PHY_AN_TIMEOUT;
890 break;
891 }
892 }
893 phydev->state = PHY_RUNNING;
894 netif_carrier_on(phydev->attached_dev);
895 phydev->adjust_link(phydev->attached_dev);
896 }
897 break;
898 case PHY_FORCING:
899 err = genphy_update_link(phydev);
900 if (err)
901 break;
902
903 if (phydev->link) {
904 phydev->state = PHY_RUNNING;
905 netif_carrier_on(phydev->attached_dev);
906 } else {
907 if (0 == phydev->link_timeout--)
908 needs_aneg = true;
909 }
910
911 phydev->adjust_link(phydev->attached_dev);
912 break;
913 case PHY_RUNNING:
914 /* Only register a CHANGE if we are polling and link changed
915 * since latest checking.
916 */
917 if (phydev->irq == PHY_POLL) {
918 old_link = phydev->link;
919 err = phy_read_status(phydev);
920 if (err)
921 break;
922
923 if (old_link != phydev->link)
924 phydev->state = PHY_CHANGELINK;
925 }
926 break;
927 case PHY_CHANGELINK:
928 err = phy_read_status(phydev);
929 if (err)
930 break;
931
932 if (phydev->link) {
933 phydev->state = PHY_RUNNING;
934 netif_carrier_on(phydev->attached_dev);
935 } else {
936 phydev->state = PHY_NOLINK;
937 netif_carrier_off(phydev->attached_dev);
938 }
939
940 phydev->adjust_link(phydev->attached_dev);
941
942 if (phy_interrupt_is_valid(phydev))
943 err = phy_config_interrupt(phydev,
944 PHY_INTERRUPT_ENABLED);
945 break;
946 case PHY_HALTED:
947 if (phydev->link) {
948 phydev->link = 0;
949 netif_carrier_off(phydev->attached_dev);
950 phydev->adjust_link(phydev->attached_dev);
951 do_suspend = true;
952 }
953 break;
954 case PHY_RESUMING:
955 if (AUTONEG_ENABLE == phydev->autoneg) {
956 err = phy_aneg_done(phydev);
957 if (err < 0)
958 break;
959
960 /* err > 0 if AN is done.
961 * Otherwise, it's 0, and we're still waiting for AN
962 */
963 if (err > 0) {
964 err = phy_read_status(phydev);
965 if (err)
966 break;
967
968 if (phydev->link) {
969 phydev->state = PHY_RUNNING;
970 netif_carrier_on(phydev->attached_dev);
971 } else {
972 phydev->state = PHY_NOLINK;
973 }
974 phydev->adjust_link(phydev->attached_dev);
975 } else {
976 phydev->state = PHY_AN;
977 phydev->link_timeout = PHY_AN_TIMEOUT;
978 }
979 } else {
980 err = phy_read_status(phydev);
981 if (err)
982 break;
983
984 if (phydev->link) {
985 phydev->state = PHY_RUNNING;
986 netif_carrier_on(phydev->attached_dev);
987 } else {
988 phydev->state = PHY_NOLINK;
989 }
990 phydev->adjust_link(phydev->attached_dev);
991 }
992 break;
993 }
994
995 mutex_unlock(&phydev->lock);
996
997 if (needs_aneg)
998 err = phy_start_aneg(phydev);
999 else if (do_suspend)
1000 phy_suspend(phydev);
1001
1002 if (err < 0)
1003 phy_error(phydev);
1004
1005 phydev_dbg(phydev, "PHY state change %s -> %s\n",
1006 phy_state_to_str(old_state),
1007 phy_state_to_str(phydev->state));
1008
1009 /* Only re-schedule a PHY state machine change if we are polling the
1010 * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1011 * between states from phy_mac_interrupt()
1012 */
1013 if (phydev->irq == PHY_POLL)
1014 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
1015 PHY_STATE_TIME * HZ);
1016}
1017
1018void phy_mac_interrupt(struct phy_device *phydev, int new_link)
1019{
1020 phydev->link = new_link;
1021
1022 /* Trigger a state machine change */
1023 queue_work(system_power_efficient_wq, &phydev->phy_queue);
1024}
1025EXPORT_SYMBOL(phy_mac_interrupt);
1026
1027static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad,
1028 int addr)
1029{
1030 /* Write the desired MMD Devad */
1031 bus->write(bus, addr, MII_MMD_CTRL, devad);
1032
1033 /* Write the desired MMD register address */
1034 bus->write(bus, addr, MII_MMD_DATA, prtad);
1035
1036 /* Select the Function : DATA with no post increment */
1037 bus->write(bus, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR));
1038}
1039
1040/**
1041 * phy_read_mmd_indirect - reads data from the MMD registers
1042 * @phydev: The PHY device bus
1043 * @prtad: MMD Address
1044 * @devad: MMD DEVAD
1045 *
1046 * Description: it reads data from the MMD registers (clause 22 to access to
1047 * clause 45) of the specified phy address.
1048 * To read these register we have:
1049 * 1) Write reg 13 // DEVAD
1050 * 2) Write reg 14 // MMD Address
1051 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1052 * 3) Read reg 14 // Read MMD data
1053 */
1054int phy_read_mmd_indirect(struct phy_device *phydev, int prtad, int devad)
1055{
1056 struct phy_driver *phydrv = phydev->drv;
1057 int addr = phydev->mdio.addr;
1058 int value = -1;
1059
1060 if (!phydrv->read_mmd_indirect) {
1061 struct mii_bus *bus = phydev->mdio.bus;
1062
1063 mutex_lock(&bus->mdio_lock);
1064 mmd_phy_indirect(bus, prtad, devad, addr);
1065
1066 /* Read the content of the MMD's selected register */
1067 value = bus->read(bus, addr, MII_MMD_DATA);
1068 mutex_unlock(&bus->mdio_lock);
1069 } else {
1070 value = phydrv->read_mmd_indirect(phydev, prtad, devad, addr);
1071 }
1072 return value;
1073}
1074EXPORT_SYMBOL(phy_read_mmd_indirect);
1075
1076/**
1077 * phy_write_mmd_indirect - writes data to the MMD registers
1078 * @phydev: The PHY device
1079 * @prtad: MMD Address
1080 * @devad: MMD DEVAD
1081 * @data: data to write in the MMD register
1082 *
1083 * Description: Write data from the MMD registers of the specified
1084 * phy address.
1085 * To write these register we have:
1086 * 1) Write reg 13 // DEVAD
1087 * 2) Write reg 14 // MMD Address
1088 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1089 * 3) Write reg 14 // Write MMD data
1090 */
1091void phy_write_mmd_indirect(struct phy_device *phydev, int prtad,
1092 int devad, u32 data)
1093{
1094 struct phy_driver *phydrv = phydev->drv;
1095 int addr = phydev->mdio.addr;
1096
1097 if (!phydrv->write_mmd_indirect) {
1098 struct mii_bus *bus = phydev->mdio.bus;
1099
1100 mutex_lock(&bus->mdio_lock);
1101 mmd_phy_indirect(bus, prtad, devad, addr);
1102
1103 /* Write the data into MMD's selected register */
1104 bus->write(bus, addr, MII_MMD_DATA, data);
1105 mutex_unlock(&bus->mdio_lock);
1106 } else {
1107 phydrv->write_mmd_indirect(phydev, prtad, devad, addr, data);
1108 }
1109}
1110EXPORT_SYMBOL(phy_write_mmd_indirect);
1111
1112/**
1113 * phy_init_eee - init and check the EEE feature
1114 * @phydev: target phy_device struct
1115 * @clk_stop_enable: PHY may stop the clock during LPI
1116 *
1117 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1118 * is supported by looking at the MMD registers 3.20 and 7.60/61
1119 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1120 * bit if required.
1121 */
1122int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1123{
1124 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1125 * Also EEE feature is active when core is operating with MII, GMII
1126 * or RGMII (all kinds). Internal PHYs are also allowed to proceed and
1127 * should return an error if they do not support EEE.
1128 */
1129 if ((phydev->duplex == DUPLEX_FULL) &&
1130 ((phydev->interface == PHY_INTERFACE_MODE_MII) ||
1131 (phydev->interface == PHY_INTERFACE_MODE_GMII) ||
1132 phy_interface_is_rgmii(phydev) ||
1133 phy_is_internal(phydev))) {
1134 int eee_lp, eee_cap, eee_adv;
1135 u32 lp, cap, adv;
1136 int status;
1137
1138 /* Read phy status to properly get the right settings */
1139 status = phy_read_status(phydev);
1140 if (status)
1141 return status;
1142
1143 /* First check if the EEE ability is supported */
1144 eee_cap = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE,
1145 MDIO_MMD_PCS);
1146 if (eee_cap <= 0)
1147 goto eee_exit_err;
1148
1149 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1150 if (!cap)
1151 goto eee_exit_err;
1152
1153 /* Check which link settings negotiated and verify it in
1154 * the EEE advertising registers.
1155 */
1156 eee_lp = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE,
1157 MDIO_MMD_AN);
1158 if (eee_lp <= 0)
1159 goto eee_exit_err;
1160
1161 eee_adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV,
1162 MDIO_MMD_AN);
1163 if (eee_adv <= 0)
1164 goto eee_exit_err;
1165
1166 adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
1167 lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
1168 if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv))
1169 goto eee_exit_err;
1170
1171 if (clk_stop_enable) {
1172 /* Configure the PHY to stop receiving xMII
1173 * clock while it is signaling LPI.
1174 */
1175 int val = phy_read_mmd_indirect(phydev, MDIO_CTRL1,
1176 MDIO_MMD_PCS);
1177 if (val < 0)
1178 return val;
1179
1180 val |= MDIO_PCS_CTRL1_CLKSTOP_EN;
1181 phy_write_mmd_indirect(phydev, MDIO_CTRL1,
1182 MDIO_MMD_PCS, val);
1183 }
1184
1185 return 0; /* EEE supported */
1186 }
1187eee_exit_err:
1188 return -EPROTONOSUPPORT;
1189}
1190EXPORT_SYMBOL(phy_init_eee);
1191
1192/**
1193 * phy_get_eee_err - report the EEE wake error count
1194 * @phydev: target phy_device struct
1195 *
1196 * Description: it is to report the number of time where the PHY
1197 * failed to complete its normal wake sequence.
1198 */
1199int phy_get_eee_err(struct phy_device *phydev)
1200{
1201 return phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_WK_ERR, MDIO_MMD_PCS);
1202}
1203EXPORT_SYMBOL(phy_get_eee_err);
1204
1205/**
1206 * phy_ethtool_get_eee - get EEE supported and status
1207 * @phydev: target phy_device struct
1208 * @data: ethtool_eee data
1209 *
1210 * Description: it reportes the Supported/Advertisement/LP Advertisement
1211 * capabilities.
1212 */
1213int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1214{
1215 int val;
1216
1217 /* Get Supported EEE */
1218 val = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE, MDIO_MMD_PCS);
1219 if (val < 0)
1220 return val;
1221 data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1222
1223 /* Get advertisement EEE */
1224 val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN);
1225 if (val < 0)
1226 return val;
1227 data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1228
1229 /* Get LP advertisement EEE */
1230 val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE, MDIO_MMD_AN);
1231 if (val < 0)
1232 return val;
1233 data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1234
1235 return 0;
1236}
1237EXPORT_SYMBOL(phy_ethtool_get_eee);
1238
1239/**
1240 * phy_ethtool_set_eee - set EEE supported and status
1241 * @phydev: target phy_device struct
1242 * @data: ethtool_eee data
1243 *
1244 * Description: it is to program the Advertisement EEE register.
1245 */
1246int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1247{
1248 int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised);
1249
1250 phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, val);
1251
1252 return 0;
1253}
1254EXPORT_SYMBOL(phy_ethtool_set_eee);
1255
1256int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1257{
1258 if (phydev->drv->set_wol)
1259 return phydev->drv->set_wol(phydev, wol);
1260
1261 return -EOPNOTSUPP;
1262}
1263EXPORT_SYMBOL(phy_ethtool_set_wol);
1264
1265void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1266{
1267 if (phydev->drv->get_wol)
1268 phydev->drv->get_wol(phydev, wol);
1269}
1270EXPORT_SYMBOL(phy_ethtool_get_wol);