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2f53e904 | 1 | /* Framework for configuring and reading PHY devices |
00db8189 AF |
2 | * Based on code in sungem_phy.c and gianfar_phy.c |
3 | * | |
4 | * Author: Andy Fleming | |
5 | * | |
6 | * Copyright (c) 2004 Freescale Semiconductor, Inc. | |
0ac49527 | 7 | * Copyright (c) 2006, 2007 Maciej W. Rozycki |
00db8189 AF |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | */ | |
8d242488 JP |
15 | |
16 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
17 | ||
00db8189 | 18 | #include <linux/kernel.h> |
00db8189 AF |
19 | #include <linux/string.h> |
20 | #include <linux/errno.h> | |
21 | #include <linux/unistd.h> | |
00db8189 | 22 | #include <linux/interrupt.h> |
00db8189 AF |
23 | #include <linux/delay.h> |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/etherdevice.h> | |
26 | #include <linux/skbuff.h> | |
00db8189 AF |
27 | #include <linux/mm.h> |
28 | #include <linux/module.h> | |
00db8189 AF |
29 | #include <linux/mii.h> |
30 | #include <linux/ethtool.h> | |
31 | #include <linux/phy.h> | |
3c3070d7 MR |
32 | #include <linux/timer.h> |
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 | |
766d1d38 FF |
41 | static 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 | ||
b3df0da8 RD |
61 | /** |
62 | * phy_print_status - Convenience function to print out the current phy status | |
63 | * @phydev: the phy_device struct | |
e1393456 AF |
64 | */ |
65 | void phy_print_status(struct phy_device *phydev) | |
66 | { | |
2f53e904 | 67 | if (phydev->link) { |
df40cc88 | 68 | netdev_info(phydev->attached_dev, |
766d1d38 FF |
69 | "Link is Up - %s/%s - flow control %s\n", |
70 | phy_speed_to_str(phydev->speed), | |
df40cc88 FF |
71 | DUPLEX_FULL == phydev->duplex ? "Full" : "Half", |
72 | phydev->pause ? "rx/tx" : "off"); | |
2f53e904 | 73 | } else { |
43b6329f | 74 | netdev_info(phydev->attached_dev, "Link is Down\n"); |
2f53e904 | 75 | } |
e1393456 AF |
76 | } |
77 | EXPORT_SYMBOL(phy_print_status); | |
00db8189 | 78 | |
b3df0da8 RD |
79 | /** |
80 | * phy_clear_interrupt - Ack the phy device's interrupt | |
81 | * @phydev: the phy_device struct | |
82 | * | |
83 | * If the @phydev driver has an ack_interrupt function, call it to | |
84 | * ack and clear the phy device's interrupt. | |
85 | * | |
ad033506 | 86 | * Returns 0 on success or < 0 on error. |
b3df0da8 | 87 | */ |
89ff05ec | 88 | static int phy_clear_interrupt(struct phy_device *phydev) |
00db8189 | 89 | { |
00db8189 | 90 | if (phydev->drv->ack_interrupt) |
e62a768f | 91 | return phydev->drv->ack_interrupt(phydev); |
00db8189 | 92 | |
e62a768f | 93 | return 0; |
00db8189 AF |
94 | } |
95 | ||
b3df0da8 RD |
96 | /** |
97 | * phy_config_interrupt - configure the PHY device for the requested interrupts | |
98 | * @phydev: the phy_device struct | |
99 | * @interrupts: interrupt flags to configure for this @phydev | |
100 | * | |
ad033506 | 101 | * Returns 0 on success or < 0 on error. |
b3df0da8 | 102 | */ |
89ff05ec | 103 | static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts) |
00db8189 | 104 | { |
00db8189 AF |
105 | phydev->interrupts = interrupts; |
106 | if (phydev->drv->config_intr) | |
e62a768f | 107 | return phydev->drv->config_intr(phydev); |
00db8189 | 108 | |
e62a768f | 109 | return 0; |
00db8189 AF |
110 | } |
111 | ||
112 | ||
b3df0da8 RD |
113 | /** |
114 | * phy_aneg_done - return auto-negotiation status | |
115 | * @phydev: target phy_device struct | |
00db8189 | 116 | * |
76a423a3 FF |
117 | * Description: Return the auto-negotiation status from this @phydev |
118 | * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation | |
119 | * is still pending. | |
00db8189 AF |
120 | */ |
121 | static inline int phy_aneg_done(struct phy_device *phydev) | |
122 | { | |
76a423a3 FF |
123 | if (phydev->drv->aneg_done) |
124 | return phydev->drv->aneg_done(phydev); | |
125 | ||
a9fa6e6a | 126 | return genphy_aneg_done(phydev); |
00db8189 AF |
127 | } |
128 | ||
00db8189 | 129 | /* A structure for mapping a particular speed and duplex |
2f53e904 SS |
130 | * combination to a particular SUPPORTED and ADVERTISED value |
131 | */ | |
00db8189 AF |
132 | struct phy_setting { |
133 | int speed; | |
134 | int duplex; | |
135 | u32 setting; | |
136 | }; | |
137 | ||
138 | /* A mapping of all SUPPORTED settings to speed/duplex */ | |
f71e1309 | 139 | static const struct phy_setting settings[] = { |
00db8189 | 140 | { |
3e707706 LT |
141 | .speed = SPEED_10000, |
142 | .duplex = DUPLEX_FULL, | |
143 | .setting = SUPPORTED_10000baseKR_Full, | |
144 | }, | |
145 | { | |
146 | .speed = SPEED_10000, | |
147 | .duplex = DUPLEX_FULL, | |
148 | .setting = SUPPORTED_10000baseKX4_Full, | |
149 | }, | |
150 | { | |
151 | .speed = SPEED_10000, | |
00db8189 AF |
152 | .duplex = DUPLEX_FULL, |
153 | .setting = SUPPORTED_10000baseT_Full, | |
154 | }, | |
3e707706 LT |
155 | { |
156 | .speed = SPEED_2500, | |
157 | .duplex = DUPLEX_FULL, | |
158 | .setting = SUPPORTED_2500baseX_Full, | |
159 | }, | |
160 | { | |
161 | .speed = SPEED_1000, | |
162 | .duplex = DUPLEX_FULL, | |
163 | .setting = SUPPORTED_1000baseKX_Full, | |
164 | }, | |
00db8189 AF |
165 | { |
166 | .speed = SPEED_1000, | |
167 | .duplex = DUPLEX_FULL, | |
168 | .setting = SUPPORTED_1000baseT_Full, | |
169 | }, | |
170 | { | |
171 | .speed = SPEED_1000, | |
172 | .duplex = DUPLEX_HALF, | |
173 | .setting = SUPPORTED_1000baseT_Half, | |
174 | }, | |
175 | { | |
176 | .speed = SPEED_100, | |
177 | .duplex = DUPLEX_FULL, | |
178 | .setting = SUPPORTED_100baseT_Full, | |
179 | }, | |
180 | { | |
181 | .speed = SPEED_100, | |
182 | .duplex = DUPLEX_HALF, | |
183 | .setting = SUPPORTED_100baseT_Half, | |
184 | }, | |
185 | { | |
186 | .speed = SPEED_10, | |
187 | .duplex = DUPLEX_FULL, | |
188 | .setting = SUPPORTED_10baseT_Full, | |
189 | }, | |
190 | { | |
191 | .speed = SPEED_10, | |
192 | .duplex = DUPLEX_HALF, | |
193 | .setting = SUPPORTED_10baseT_Half, | |
194 | }, | |
195 | }; | |
196 | ||
ff8ac609 | 197 | #define MAX_NUM_SETTINGS ARRAY_SIZE(settings) |
00db8189 | 198 | |
b3df0da8 RD |
199 | /** |
200 | * phy_find_setting - find a PHY settings array entry that matches speed & duplex | |
201 | * @speed: speed to match | |
202 | * @duplex: duplex to match | |
00db8189 | 203 | * |
b3df0da8 | 204 | * Description: Searches the settings array for the setting which |
00db8189 AF |
205 | * matches the desired speed and duplex, and returns the index |
206 | * of that setting. Returns the index of the last setting if | |
207 | * none of the others match. | |
208 | */ | |
4ae6e50c | 209 | static inline unsigned int phy_find_setting(int speed, int duplex) |
00db8189 | 210 | { |
4ae6e50c | 211 | unsigned int idx = 0; |
00db8189 AF |
212 | |
213 | while (idx < ARRAY_SIZE(settings) && | |
2f53e904 | 214 | (settings[idx].speed != speed || settings[idx].duplex != duplex)) |
00db8189 AF |
215 | idx++; |
216 | ||
217 | return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1; | |
218 | } | |
219 | ||
b3df0da8 RD |
220 | /** |
221 | * phy_find_valid - find a PHY setting that matches the requested features mask | |
222 | * @idx: The first index in settings[] to search | |
223 | * @features: A mask of the valid settings | |
00db8189 | 224 | * |
b3df0da8 | 225 | * Description: Returns the index of the first valid setting less |
00db8189 AF |
226 | * than or equal to the one pointed to by idx, as determined by |
227 | * the mask in features. Returns the index of the last setting | |
228 | * if nothing else matches. | |
229 | */ | |
4ae6e50c | 230 | static inline unsigned int phy_find_valid(unsigned int idx, u32 features) |
00db8189 AF |
231 | { |
232 | while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features)) | |
233 | idx++; | |
234 | ||
235 | return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1; | |
236 | } | |
237 | ||
b3df0da8 RD |
238 | /** |
239 | * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex | |
240 | * @phydev: the target phy_device struct | |
00db8189 | 241 | * |
b3df0da8 | 242 | * Description: Make sure the PHY is set to supported speeds and |
00db8189 | 243 | * duplexes. Drop down by one in this order: 1000/FULL, |
b3df0da8 | 244 | * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF. |
00db8189 | 245 | */ |
89ff05ec | 246 | static void phy_sanitize_settings(struct phy_device *phydev) |
00db8189 AF |
247 | { |
248 | u32 features = phydev->supported; | |
4ae6e50c | 249 | unsigned int idx; |
00db8189 AF |
250 | |
251 | /* Sanitize settings based on PHY capabilities */ | |
252 | if ((features & SUPPORTED_Autoneg) == 0) | |
163642a2 | 253 | phydev->autoneg = AUTONEG_DISABLE; |
00db8189 AF |
254 | |
255 | idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex), | |
256 | features); | |
257 | ||
258 | phydev->speed = settings[idx].speed; | |
259 | phydev->duplex = settings[idx].duplex; | |
260 | } | |
00db8189 | 261 | |
b3df0da8 RD |
262 | /** |
263 | * phy_ethtool_sset - generic ethtool sset function, handles all the details | |
264 | * @phydev: target phy_device struct | |
265 | * @cmd: ethtool_cmd | |
00db8189 AF |
266 | * |
267 | * A few notes about parameter checking: | |
268 | * - We don't set port or transceiver, so we don't care what they | |
269 | * were set to. | |
270 | * - phy_start_aneg() will make sure forced settings are sane, and | |
271 | * choose the next best ones from the ones selected, so we don't | |
b3df0da8 | 272 | * care if ethtool tries to give us bad values. |
00db8189 AF |
273 | */ |
274 | int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd) | |
275 | { | |
25db0338 DD |
276 | u32 speed = ethtool_cmd_speed(cmd); |
277 | ||
00db8189 AF |
278 | if (cmd->phy_address != phydev->addr) |
279 | return -EINVAL; | |
280 | ||
2f53e904 | 281 | /* We make sure that we don't pass unsupported values in to the PHY */ |
00db8189 AF |
282 | cmd->advertising &= phydev->supported; |
283 | ||
284 | /* Verify the settings we care about. */ | |
285 | if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) | |
286 | return -EINVAL; | |
287 | ||
288 | if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) | |
289 | return -EINVAL; | |
290 | ||
8e95a202 | 291 | if (cmd->autoneg == AUTONEG_DISABLE && |
25db0338 DD |
292 | ((speed != SPEED_1000 && |
293 | speed != SPEED_100 && | |
294 | speed != SPEED_10) || | |
8e95a202 JP |
295 | (cmd->duplex != DUPLEX_HALF && |
296 | cmd->duplex != DUPLEX_FULL))) | |
00db8189 AF |
297 | return -EINVAL; |
298 | ||
299 | phydev->autoneg = cmd->autoneg; | |
300 | ||
25db0338 | 301 | phydev->speed = speed; |
00db8189 AF |
302 | |
303 | phydev->advertising = cmd->advertising; | |
304 | ||
305 | if (AUTONEG_ENABLE == cmd->autoneg) | |
306 | phydev->advertising |= ADVERTISED_Autoneg; | |
307 | else | |
308 | phydev->advertising &= ~ADVERTISED_Autoneg; | |
309 | ||
310 | phydev->duplex = cmd->duplex; | |
311 | ||
312 | /* Restart the PHY */ | |
313 | phy_start_aneg(phydev); | |
314 | ||
315 | return 0; | |
316 | } | |
9f6d55d0 | 317 | EXPORT_SYMBOL(phy_ethtool_sset); |
00db8189 AF |
318 | |
319 | int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd) | |
320 | { | |
321 | cmd->supported = phydev->supported; | |
322 | ||
323 | cmd->advertising = phydev->advertising; | |
114002bc | 324 | cmd->lp_advertising = phydev->lp_advertising; |
00db8189 | 325 | |
70739497 | 326 | ethtool_cmd_speed_set(cmd, phydev->speed); |
00db8189 | 327 | cmd->duplex = phydev->duplex; |
c88838ce FF |
328 | if (phydev->interface == PHY_INTERFACE_MODE_MOCA) |
329 | cmd->port = PORT_BNC; | |
330 | else | |
331 | cmd->port = PORT_MII; | |
00db8189 | 332 | cmd->phy_address = phydev->addr; |
4284b6a5 FF |
333 | cmd->transceiver = phy_is_internal(phydev) ? |
334 | XCVR_INTERNAL : XCVR_EXTERNAL; | |
00db8189 AF |
335 | cmd->autoneg = phydev->autoneg; |
336 | ||
337 | return 0; | |
338 | } | |
9f6d55d0 | 339 | EXPORT_SYMBOL(phy_ethtool_gset); |
00db8189 | 340 | |
b3df0da8 RD |
341 | /** |
342 | * phy_mii_ioctl - generic PHY MII ioctl interface | |
343 | * @phydev: the phy_device struct | |
00c7d920 | 344 | * @ifr: &struct ifreq for socket ioctl's |
b3df0da8 RD |
345 | * @cmd: ioctl cmd to execute |
346 | * | |
347 | * Note that this function is currently incompatible with the | |
00db8189 | 348 | * PHYCONTROL layer. It changes registers without regard to |
b3df0da8 | 349 | * current state. Use at own risk. |
00db8189 | 350 | */ |
2f53e904 | 351 | int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd) |
00db8189 | 352 | { |
28b04113 | 353 | struct mii_ioctl_data *mii_data = if_mii(ifr); |
00db8189 | 354 | u16 val = mii_data->val_in; |
79ce0477 | 355 | bool change_autoneg = false; |
00db8189 AF |
356 | |
357 | switch (cmd) { | |
358 | case SIOCGMIIPHY: | |
359 | mii_data->phy_id = phydev->addr; | |
c6d6a511 LB |
360 | /* fall through */ |
361 | ||
00db8189 | 362 | case SIOCGMIIREG: |
af1dc13e PK |
363 | mii_data->val_out = mdiobus_read(phydev->bus, mii_data->phy_id, |
364 | mii_data->reg_num); | |
e62a768f | 365 | return 0; |
00db8189 AF |
366 | |
367 | case SIOCSMIIREG: | |
00db8189 | 368 | if (mii_data->phy_id == phydev->addr) { |
e109374f | 369 | switch (mii_data->reg_num) { |
00db8189 | 370 | case MII_BMCR: |
79ce0477 BH |
371 | if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) { |
372 | if (phydev->autoneg == AUTONEG_ENABLE) | |
373 | change_autoneg = true; | |
00db8189 | 374 | phydev->autoneg = AUTONEG_DISABLE; |
79ce0477 BH |
375 | if (val & BMCR_FULLDPLX) |
376 | phydev->duplex = DUPLEX_FULL; | |
377 | else | |
378 | phydev->duplex = DUPLEX_HALF; | |
379 | if (val & BMCR_SPEED1000) | |
380 | phydev->speed = SPEED_1000; | |
381 | else if (val & BMCR_SPEED100) | |
382 | phydev->speed = SPEED_100; | |
383 | else phydev->speed = SPEED_10; | |
384 | } | |
385 | else { | |
386 | if (phydev->autoneg == AUTONEG_DISABLE) | |
387 | change_autoneg = true; | |
00db8189 | 388 | phydev->autoneg = AUTONEG_ENABLE; |
79ce0477 | 389 | } |
00db8189 AF |
390 | break; |
391 | case MII_ADVERTISE: | |
79ce0477 BH |
392 | phydev->advertising = mii_adv_to_ethtool_adv_t(val); |
393 | change_autoneg = true; | |
00db8189 AF |
394 | break; |
395 | default: | |
396 | /* do nothing */ | |
397 | break; | |
398 | } | |
399 | } | |
400 | ||
af1dc13e PK |
401 | mdiobus_write(phydev->bus, mii_data->phy_id, |
402 | mii_data->reg_num, val); | |
403 | ||
8e95a202 | 404 | if (mii_data->reg_num == MII_BMCR && |
2613f95f | 405 | val & BMCR_RESET) |
e62a768f | 406 | return phy_init_hw(phydev); |
79ce0477 BH |
407 | |
408 | if (change_autoneg) | |
409 | return phy_start_aneg(phydev); | |
410 | ||
e62a768f | 411 | return 0; |
dda93b48 | 412 | |
c1f19b51 RC |
413 | case SIOCSHWTSTAMP: |
414 | if (phydev->drv->hwtstamp) | |
415 | return phydev->drv->hwtstamp(phydev, ifr); | |
416 | /* fall through */ | |
417 | ||
dda93b48 | 418 | default: |
c6d6a511 | 419 | return -EOPNOTSUPP; |
00db8189 | 420 | } |
00db8189 | 421 | } |
680e9fe9 | 422 | EXPORT_SYMBOL(phy_mii_ioctl); |
00db8189 | 423 | |
b3df0da8 RD |
424 | /** |
425 | * phy_start_aneg - start auto-negotiation for this PHY device | |
426 | * @phydev: the phy_device struct | |
e1393456 | 427 | * |
b3df0da8 RD |
428 | * Description: Sanitizes the settings (if we're not autonegotiating |
429 | * them), and then calls the driver's config_aneg function. | |
430 | * If the PHYCONTROL Layer is operating, we change the state to | |
431 | * reflect the beginning of Auto-negotiation or forcing. | |
e1393456 AF |
432 | */ |
433 | int phy_start_aneg(struct phy_device *phydev) | |
434 | { | |
435 | int err; | |
436 | ||
35b5f6b1 | 437 | mutex_lock(&phydev->lock); |
e1393456 AF |
438 | |
439 | if (AUTONEG_DISABLE == phydev->autoneg) | |
440 | phy_sanitize_settings(phydev); | |
441 | ||
442 | err = phydev->drv->config_aneg(phydev); | |
e1393456 AF |
443 | if (err < 0) |
444 | goto out_unlock; | |
445 | ||
446 | if (phydev->state != PHY_HALTED) { | |
447 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
448 | phydev->state = PHY_AN; | |
449 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
450 | } else { | |
451 | phydev->state = PHY_FORCING; | |
452 | phydev->link_timeout = PHY_FORCE_TIMEOUT; | |
453 | } | |
454 | } | |
455 | ||
456 | out_unlock: | |
35b5f6b1 | 457 | mutex_unlock(&phydev->lock); |
e1393456 AF |
458 | return err; |
459 | } | |
460 | EXPORT_SYMBOL(phy_start_aneg); | |
461 | ||
b3df0da8 RD |
462 | /** |
463 | * phy_start_machine - start PHY state machine tracking | |
464 | * @phydev: the phy_device struct | |
00db8189 | 465 | * |
b3df0da8 | 466 | * Description: The PHY infrastructure can run a state machine |
00db8189 AF |
467 | * which tracks whether the PHY is starting up, negotiating, |
468 | * etc. This function starts the timer which tracks the state | |
29935aeb SS |
469 | * of the PHY. If you want to maintain your own state machine, |
470 | * do not call this function. | |
b3df0da8 | 471 | */ |
29935aeb | 472 | void phy_start_machine(struct phy_device *phydev) |
00db8189 | 473 | { |
bbb47bde | 474 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ); |
00db8189 AF |
475 | } |
476 | ||
b3df0da8 RD |
477 | /** |
478 | * phy_stop_machine - stop the PHY state machine tracking | |
479 | * @phydev: target phy_device struct | |
00db8189 | 480 | * |
b3df0da8 | 481 | * Description: Stops the state machine timer, sets the state to UP |
817acf5e | 482 | * (unless it wasn't up yet). This function must be called BEFORE |
00db8189 AF |
483 | * phy_detach. |
484 | */ | |
485 | void phy_stop_machine(struct phy_device *phydev) | |
486 | { | |
a390d1f3 | 487 | cancel_delayed_work_sync(&phydev->state_queue); |
00db8189 | 488 | |
35b5f6b1 | 489 | mutex_lock(&phydev->lock); |
00db8189 AF |
490 | if (phydev->state > PHY_UP) |
491 | phydev->state = PHY_UP; | |
35b5f6b1 | 492 | mutex_unlock(&phydev->lock); |
00db8189 AF |
493 | } |
494 | ||
b3df0da8 RD |
495 | /** |
496 | * phy_error - enter HALTED state for this PHY device | |
497 | * @phydev: target phy_device struct | |
00db8189 AF |
498 | * |
499 | * Moves the PHY to the HALTED state in response to a read | |
500 | * or write error, and tells the controller the link is down. | |
501 | * Must not be called from interrupt context, or while the | |
502 | * phydev->lock is held. | |
503 | */ | |
9b9a8bfc | 504 | static void phy_error(struct phy_device *phydev) |
00db8189 | 505 | { |
35b5f6b1 | 506 | mutex_lock(&phydev->lock); |
00db8189 | 507 | phydev->state = PHY_HALTED; |
35b5f6b1 | 508 | mutex_unlock(&phydev->lock); |
00db8189 AF |
509 | } |
510 | ||
b3df0da8 RD |
511 | /** |
512 | * phy_interrupt - PHY interrupt handler | |
513 | * @irq: interrupt line | |
514 | * @phy_dat: phy_device pointer | |
e1393456 | 515 | * |
b3df0da8 | 516 | * Description: When a PHY interrupt occurs, the handler disables |
e1393456 AF |
517 | * interrupts, and schedules a work task to clear the interrupt. |
518 | */ | |
7d12e780 | 519 | static irqreturn_t phy_interrupt(int irq, void *phy_dat) |
e1393456 AF |
520 | { |
521 | struct phy_device *phydev = phy_dat; | |
522 | ||
3c3070d7 MR |
523 | if (PHY_HALTED == phydev->state) |
524 | return IRQ_NONE; /* It can't be ours. */ | |
525 | ||
e1393456 AF |
526 | /* The MDIO bus is not allowed to be written in interrupt |
527 | * context, so we need to disable the irq here. A work | |
528 | * queue will write the PHY to disable and clear the | |
2f53e904 SS |
529 | * interrupt, and then reenable the irq line. |
530 | */ | |
e1393456 | 531 | disable_irq_nosync(irq); |
0ac49527 | 532 | atomic_inc(&phydev->irq_disable); |
e1393456 | 533 | |
bbb47bde | 534 | queue_work(system_power_efficient_wq, &phydev->phy_queue); |
e1393456 AF |
535 | |
536 | return IRQ_HANDLED; | |
537 | } | |
538 | ||
b3df0da8 RD |
539 | /** |
540 | * phy_enable_interrupts - Enable the interrupts from the PHY side | |
541 | * @phydev: target phy_device struct | |
542 | */ | |
89ff05ec | 543 | static int phy_enable_interrupts(struct phy_device *phydev) |
00db8189 | 544 | { |
553fe92b | 545 | int err = phy_clear_interrupt(phydev); |
00db8189 | 546 | |
e1393456 AF |
547 | if (err < 0) |
548 | return err; | |
00db8189 | 549 | |
553fe92b | 550 | return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); |
00db8189 | 551 | } |
00db8189 | 552 | |
b3df0da8 RD |
553 | /** |
554 | * phy_disable_interrupts - Disable the PHY interrupts from the PHY side | |
555 | * @phydev: target phy_device struct | |
556 | */ | |
89ff05ec | 557 | static int phy_disable_interrupts(struct phy_device *phydev) |
00db8189 AF |
558 | { |
559 | int err; | |
560 | ||
561 | /* Disable PHY interrupts */ | |
562 | err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); | |
00db8189 AF |
563 | if (err) |
564 | goto phy_err; | |
565 | ||
566 | /* Clear the interrupt */ | |
567 | err = phy_clear_interrupt(phydev); | |
00db8189 AF |
568 | if (err) |
569 | goto phy_err; | |
570 | ||
571 | return 0; | |
572 | ||
573 | phy_err: | |
574 | phy_error(phydev); | |
575 | ||
576 | return err; | |
577 | } | |
e1393456 | 578 | |
b3df0da8 RD |
579 | /** |
580 | * phy_start_interrupts - request and enable interrupts for a PHY device | |
581 | * @phydev: target phy_device struct | |
e1393456 | 582 | * |
b3df0da8 RD |
583 | * Description: Request the interrupt for the given PHY. |
584 | * If this fails, then we set irq to PHY_POLL. | |
e1393456 | 585 | * Otherwise, we enable the interrupts in the PHY. |
e1393456 | 586 | * This should only be called with a valid IRQ number. |
b3df0da8 | 587 | * Returns 0 on success or < 0 on error. |
e1393456 AF |
588 | */ |
589 | int phy_start_interrupts(struct phy_device *phydev) | |
590 | { | |
0ac49527 | 591 | atomic_set(&phydev->irq_disable, 0); |
33c133cc SS |
592 | if (request_irq(phydev->irq, phy_interrupt, 0, "phy_interrupt", |
593 | phydev) < 0) { | |
8d242488 JP |
594 | pr_warn("%s: Can't get IRQ %d (PHY)\n", |
595 | phydev->bus->name, phydev->irq); | |
e1393456 AF |
596 | phydev->irq = PHY_POLL; |
597 | return 0; | |
598 | } | |
599 | ||
e62a768f | 600 | return phy_enable_interrupts(phydev); |
e1393456 AF |
601 | } |
602 | EXPORT_SYMBOL(phy_start_interrupts); | |
603 | ||
b3df0da8 RD |
604 | /** |
605 | * phy_stop_interrupts - disable interrupts from a PHY device | |
606 | * @phydev: target phy_device struct | |
607 | */ | |
e1393456 AF |
608 | int phy_stop_interrupts(struct phy_device *phydev) |
609 | { | |
553fe92b | 610 | int err = phy_disable_interrupts(phydev); |
e1393456 AF |
611 | |
612 | if (err) | |
613 | phy_error(phydev); | |
614 | ||
0ac49527 MR |
615 | free_irq(phydev->irq, phydev); |
616 | ||
2f53e904 | 617 | /* Cannot call flush_scheduled_work() here as desired because |
0ac49527 MR |
618 | * of rtnl_lock(), but we do not really care about what would |
619 | * be done, except from enable_irq(), so cancel any work | |
620 | * possibly pending and take care of the matter below. | |
3c3070d7 | 621 | */ |
28e53bdd | 622 | cancel_work_sync(&phydev->phy_queue); |
2f53e904 | 623 | /* If work indeed has been cancelled, disable_irq() will have |
0ac49527 MR |
624 | * been left unbalanced from phy_interrupt() and enable_irq() |
625 | * has to be called so that other devices on the line work. | |
626 | */ | |
627 | while (atomic_dec_return(&phydev->irq_disable) >= 0) | |
628 | enable_irq(phydev->irq); | |
e1393456 AF |
629 | |
630 | return err; | |
631 | } | |
632 | EXPORT_SYMBOL(phy_stop_interrupts); | |
633 | ||
b3df0da8 RD |
634 | /** |
635 | * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes | |
636 | * @work: work_struct that describes the work to be done | |
637 | */ | |
5ea94e76 | 638 | void phy_change(struct work_struct *work) |
e1393456 | 639 | { |
c4028958 DH |
640 | struct phy_device *phydev = |
641 | container_of(work, struct phy_device, phy_queue); | |
e1393456 | 642 | |
a8729eb3 AG |
643 | if (phydev->drv->did_interrupt && |
644 | !phydev->drv->did_interrupt(phydev)) | |
645 | goto ignore; | |
646 | ||
e62a768f | 647 | if (phy_disable_interrupts(phydev)) |
e1393456 AF |
648 | goto phy_err; |
649 | ||
35b5f6b1 | 650 | mutex_lock(&phydev->lock); |
e1393456 AF |
651 | if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state)) |
652 | phydev->state = PHY_CHANGELINK; | |
35b5f6b1 | 653 | mutex_unlock(&phydev->lock); |
e1393456 | 654 | |
0ac49527 | 655 | atomic_dec(&phydev->irq_disable); |
e1393456 AF |
656 | enable_irq(phydev->irq); |
657 | ||
658 | /* Reenable interrupts */ | |
e62a768f SS |
659 | if (PHY_HALTED != phydev->state && |
660 | phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED)) | |
e1393456 AF |
661 | goto irq_enable_err; |
662 | ||
a390d1f3 MS |
663 | /* reschedule state queue work to run as soon as possible */ |
664 | cancel_delayed_work_sync(&phydev->state_queue); | |
bbb47bde | 665 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0); |
e1393456 AF |
666 | return; |
667 | ||
a8729eb3 AG |
668 | ignore: |
669 | atomic_dec(&phydev->irq_disable); | |
670 | enable_irq(phydev->irq); | |
671 | return; | |
672 | ||
e1393456 AF |
673 | irq_enable_err: |
674 | disable_irq(phydev->irq); | |
0ac49527 | 675 | atomic_inc(&phydev->irq_disable); |
e1393456 AF |
676 | phy_err: |
677 | phy_error(phydev); | |
678 | } | |
679 | ||
b3df0da8 RD |
680 | /** |
681 | * phy_stop - Bring down the PHY link, and stop checking the status | |
682 | * @phydev: target phy_device struct | |
683 | */ | |
e1393456 AF |
684 | void phy_stop(struct phy_device *phydev) |
685 | { | |
35b5f6b1 | 686 | mutex_lock(&phydev->lock); |
e1393456 AF |
687 | |
688 | if (PHY_HALTED == phydev->state) | |
689 | goto out_unlock; | |
690 | ||
2c7b4921 | 691 | if (phy_interrupt_is_valid(phydev)) { |
e1393456 AF |
692 | /* Disable PHY Interrupts */ |
693 | phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); | |
e1393456 | 694 | |
3c3070d7 MR |
695 | /* Clear any pending interrupts */ |
696 | phy_clear_interrupt(phydev); | |
697 | } | |
e1393456 | 698 | |
6daf6531 MR |
699 | phydev->state = PHY_HALTED; |
700 | ||
e1393456 | 701 | out_unlock: |
35b5f6b1 | 702 | mutex_unlock(&phydev->lock); |
3c3070d7 | 703 | |
2f53e904 | 704 | /* Cannot call flush_scheduled_work() here as desired because |
3c3070d7 MR |
705 | * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change() |
706 | * will not reenable interrupts. | |
707 | */ | |
e1393456 | 708 | } |
2f53e904 | 709 | EXPORT_SYMBOL(phy_stop); |
e1393456 | 710 | |
b3df0da8 RD |
711 | /** |
712 | * phy_start - start or restart a PHY device | |
713 | * @phydev: target phy_device struct | |
e1393456 | 714 | * |
b3df0da8 | 715 | * Description: Indicates the attached device's readiness to |
e1393456 AF |
716 | * handle PHY-related work. Used during startup to start the |
717 | * PHY, and after a call to phy_stop() to resume operation. | |
718 | * Also used to indicate the MDIO bus has cleared an error | |
719 | * condition. | |
720 | */ | |
721 | void phy_start(struct phy_device *phydev) | |
722 | { | |
35b5f6b1 | 723 | mutex_lock(&phydev->lock); |
e1393456 AF |
724 | |
725 | switch (phydev->state) { | |
e109374f FF |
726 | case PHY_STARTING: |
727 | phydev->state = PHY_PENDING; | |
728 | break; | |
729 | case PHY_READY: | |
730 | phydev->state = PHY_UP; | |
731 | break; | |
732 | case PHY_HALTED: | |
733 | phydev->state = PHY_RESUMING; | |
734 | default: | |
735 | break; | |
e1393456 | 736 | } |
35b5f6b1 | 737 | mutex_unlock(&phydev->lock); |
e1393456 | 738 | } |
e1393456 | 739 | EXPORT_SYMBOL(phy_start); |
67c4f3fa | 740 | |
35b5f6b1 NC |
741 | /** |
742 | * phy_state_machine - Handle the state machine | |
743 | * @work: work_struct that describes the work to be done | |
35b5f6b1 | 744 | */ |
4f9c85a1 | 745 | void phy_state_machine(struct work_struct *work) |
00db8189 | 746 | { |
bf6aede7 | 747 | struct delayed_work *dwork = to_delayed_work(work); |
35b5f6b1 | 748 | struct phy_device *phydev = |
a390d1f3 | 749 | container_of(dwork, struct phy_device, state_queue); |
6e14a5ee | 750 | bool needs_aneg = false, do_suspend = false, do_resume = false; |
00db8189 AF |
751 | int err = 0; |
752 | ||
35b5f6b1 | 753 | mutex_lock(&phydev->lock); |
00db8189 | 754 | |
2b8f2a28 DM |
755 | if (phydev->drv->link_change_notify) |
756 | phydev->drv->link_change_notify(phydev); | |
757 | ||
e109374f FF |
758 | switch (phydev->state) { |
759 | case PHY_DOWN: | |
760 | case PHY_STARTING: | |
761 | case PHY_READY: | |
762 | case PHY_PENDING: | |
763 | break; | |
764 | case PHY_UP: | |
6e14a5ee | 765 | needs_aneg = true; |
00db8189 | 766 | |
e109374f FF |
767 | phydev->link_timeout = PHY_AN_TIMEOUT; |
768 | ||
769 | break; | |
770 | case PHY_AN: | |
771 | err = phy_read_status(phydev); | |
e109374f | 772 | if (err < 0) |
00db8189 | 773 | break; |
6b655529 | 774 | |
2f53e904 | 775 | /* If the link is down, give up on negotiation for now */ |
e109374f FF |
776 | if (!phydev->link) { |
777 | phydev->state = PHY_NOLINK; | |
778 | netif_carrier_off(phydev->attached_dev); | |
779 | phydev->adjust_link(phydev->attached_dev); | |
780 | break; | |
781 | } | |
6b655529 | 782 | |
2f53e904 | 783 | /* Check if negotiation is done. Break if there's an error */ |
e109374f FF |
784 | err = phy_aneg_done(phydev); |
785 | if (err < 0) | |
786 | break; | |
6b655529 | 787 | |
e109374f FF |
788 | /* If AN is done, we're running */ |
789 | if (err > 0) { | |
790 | phydev->state = PHY_RUNNING; | |
791 | netif_carrier_on(phydev->attached_dev); | |
792 | phydev->adjust_link(phydev->attached_dev); | |
00db8189 | 793 | |
fa8cddaf | 794 | } else if (0 == phydev->link_timeout--) |
6e14a5ee | 795 | needs_aneg = true; |
e109374f FF |
796 | break; |
797 | case PHY_NOLINK: | |
798 | err = phy_read_status(phydev); | |
e109374f | 799 | if (err) |
00db8189 | 800 | break; |
00db8189 | 801 | |
e109374f | 802 | if (phydev->link) { |
e46e08b8 BK |
803 | if (AUTONEG_ENABLE == phydev->autoneg) { |
804 | err = phy_aneg_done(phydev); | |
805 | if (err < 0) | |
806 | break; | |
807 | ||
808 | if (!err) { | |
809 | phydev->state = PHY_AN; | |
810 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
811 | break; | |
812 | } | |
813 | } | |
e109374f FF |
814 | phydev->state = PHY_RUNNING; |
815 | netif_carrier_on(phydev->attached_dev); | |
816 | phydev->adjust_link(phydev->attached_dev); | |
817 | } | |
818 | break; | |
819 | case PHY_FORCING: | |
820 | err = genphy_update_link(phydev); | |
e109374f | 821 | if (err) |
00db8189 | 822 | break; |
00db8189 | 823 | |
e109374f FF |
824 | if (phydev->link) { |
825 | phydev->state = PHY_RUNNING; | |
826 | netif_carrier_on(phydev->attached_dev); | |
827 | } else { | |
828 | if (0 == phydev->link_timeout--) | |
6e14a5ee | 829 | needs_aneg = true; |
e109374f | 830 | } |
00db8189 | 831 | |
e109374f FF |
832 | phydev->adjust_link(phydev->attached_dev); |
833 | break; | |
834 | case PHY_RUNNING: | |
835 | /* Only register a CHANGE if we are | |
836 | * polling or ignoring interrupts | |
837 | */ | |
838 | if (!phy_interrupt_is_valid(phydev)) | |
839 | phydev->state = PHY_CHANGELINK; | |
840 | break; | |
841 | case PHY_CHANGELINK: | |
842 | err = phy_read_status(phydev); | |
e109374f | 843 | if (err) |
00db8189 | 844 | break; |
00db8189 | 845 | |
e109374f FF |
846 | if (phydev->link) { |
847 | phydev->state = PHY_RUNNING; | |
848 | netif_carrier_on(phydev->attached_dev); | |
849 | } else { | |
850 | phydev->state = PHY_NOLINK; | |
851 | netif_carrier_off(phydev->attached_dev); | |
852 | } | |
00db8189 | 853 | |
e109374f | 854 | phydev->adjust_link(phydev->attached_dev); |
00db8189 | 855 | |
e109374f FF |
856 | if (phy_interrupt_is_valid(phydev)) |
857 | err = phy_config_interrupt(phydev, | |
2f53e904 | 858 | PHY_INTERRUPT_ENABLED); |
e109374f FF |
859 | break; |
860 | case PHY_HALTED: | |
861 | if (phydev->link) { | |
862 | phydev->link = 0; | |
863 | netif_carrier_off(phydev->attached_dev); | |
00db8189 | 864 | phydev->adjust_link(phydev->attached_dev); |
6e14a5ee | 865 | do_suspend = true; |
e109374f FF |
866 | } |
867 | break; | |
868 | case PHY_RESUMING: | |
e109374f | 869 | err = phy_clear_interrupt(phydev); |
e109374f FF |
870 | if (err) |
871 | break; | |
00db8189 | 872 | |
2f53e904 | 873 | err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); |
e109374f FF |
874 | if (err) |
875 | break; | |
00db8189 | 876 | |
e109374f FF |
877 | if (AUTONEG_ENABLE == phydev->autoneg) { |
878 | err = phy_aneg_done(phydev); | |
879 | if (err < 0) | |
00db8189 AF |
880 | break; |
881 | ||
e109374f | 882 | /* err > 0 if AN is done. |
2f53e904 SS |
883 | * Otherwise, it's 0, and we're still waiting for AN |
884 | */ | |
e109374f | 885 | if (err > 0) { |
42caa074 WF |
886 | err = phy_read_status(phydev); |
887 | if (err) | |
888 | break; | |
889 | ||
890 | if (phydev->link) { | |
891 | phydev->state = PHY_RUNNING; | |
892 | netif_carrier_on(phydev->attached_dev); | |
2f53e904 | 893 | } else { |
42caa074 | 894 | phydev->state = PHY_NOLINK; |
2f53e904 | 895 | } |
42caa074 | 896 | phydev->adjust_link(phydev->attached_dev); |
e109374f FF |
897 | } else { |
898 | phydev->state = PHY_AN; | |
899 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
42caa074 | 900 | } |
e109374f FF |
901 | } else { |
902 | err = phy_read_status(phydev); | |
903 | if (err) | |
904 | break; | |
905 | ||
906 | if (phydev->link) { | |
907 | phydev->state = PHY_RUNNING; | |
908 | netif_carrier_on(phydev->attached_dev); | |
2f53e904 | 909 | } else { |
e109374f | 910 | phydev->state = PHY_NOLINK; |
2f53e904 | 911 | } |
e109374f FF |
912 | phydev->adjust_link(phydev->attached_dev); |
913 | } | |
6e14a5ee | 914 | do_resume = true; |
e109374f | 915 | break; |
00db8189 AF |
916 | } |
917 | ||
35b5f6b1 | 918 | mutex_unlock(&phydev->lock); |
00db8189 AF |
919 | |
920 | if (needs_aneg) | |
921 | err = phy_start_aneg(phydev); | |
6e14a5ee | 922 | else if (do_suspend) |
be9dad1f | 923 | phy_suspend(phydev); |
6e14a5ee ZG |
924 | else if (do_resume) |
925 | phy_resume(phydev); | |
be9dad1f | 926 | |
00db8189 AF |
927 | if (err < 0) |
928 | phy_error(phydev); | |
929 | ||
bbb47bde | 930 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, |
2f53e904 | 931 | PHY_STATE_TIME * HZ); |
35b5f6b1 | 932 | } |
a59a4d19 | 933 | |
5ea94e76 FF |
934 | void phy_mac_interrupt(struct phy_device *phydev, int new_link) |
935 | { | |
936 | cancel_work_sync(&phydev->phy_queue); | |
937 | phydev->link = new_link; | |
938 | schedule_work(&phydev->phy_queue); | |
939 | } | |
940 | EXPORT_SYMBOL(phy_mac_interrupt); | |
941 | ||
a59a4d19 GC |
942 | static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad, |
943 | int addr) | |
944 | { | |
945 | /* Write the desired MMD Devad */ | |
946 | bus->write(bus, addr, MII_MMD_CTRL, devad); | |
947 | ||
948 | /* Write the desired MMD register address */ | |
949 | bus->write(bus, addr, MII_MMD_DATA, prtad); | |
950 | ||
951 | /* Select the Function : DATA with no post increment */ | |
952 | bus->write(bus, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR)); | |
953 | } | |
954 | ||
955 | /** | |
956 | * phy_read_mmd_indirect - reads data from the MMD registers | |
0c1d77df | 957 | * @phydev: The PHY device bus |
a59a4d19 GC |
958 | * @prtad: MMD Address |
959 | * @devad: MMD DEVAD | |
960 | * @addr: PHY address on the MII bus | |
961 | * | |
962 | * Description: it reads data from the MMD registers (clause 22 to access to | |
963 | * clause 45) of the specified phy address. | |
964 | * To read these register we have: | |
965 | * 1) Write reg 13 // DEVAD | |
966 | * 2) Write reg 14 // MMD Address | |
967 | * 3) Write reg 13 // MMD Data Command for MMD DEVAD | |
968 | * 3) Read reg 14 // Read MMD data | |
969 | */ | |
66ce7fb9 | 970 | int phy_read_mmd_indirect(struct phy_device *phydev, int prtad, |
0c1d77df | 971 | int devad, int addr) |
a59a4d19 | 972 | { |
0c1d77df VB |
973 | struct phy_driver *phydrv = phydev->drv; |
974 | int value = -1; | |
a59a4d19 | 975 | |
0c1d77df VB |
976 | if (phydrv->read_mmd_indirect == NULL) { |
977 | mmd_phy_indirect(phydev->bus, prtad, devad, addr); | |
978 | ||
979 | /* Read the content of the MMD's selected register */ | |
980 | value = phydev->bus->read(phydev->bus, addr, MII_MMD_DATA); | |
981 | } else { | |
982 | value = phydrv->read_mmd_indirect(phydev, prtad, devad, addr); | |
983 | } | |
984 | return value; | |
a59a4d19 | 985 | } |
66ce7fb9 | 986 | EXPORT_SYMBOL(phy_read_mmd_indirect); |
a59a4d19 GC |
987 | |
988 | /** | |
989 | * phy_write_mmd_indirect - writes data to the MMD registers | |
0c1d77df | 990 | * @phydev: The PHY device |
a59a4d19 GC |
991 | * @prtad: MMD Address |
992 | * @devad: MMD DEVAD | |
993 | * @addr: PHY address on the MII bus | |
994 | * @data: data to write in the MMD register | |
995 | * | |
996 | * Description: Write data from the MMD registers of the specified | |
997 | * phy address. | |
998 | * To write these register we have: | |
999 | * 1) Write reg 13 // DEVAD | |
1000 | * 2) Write reg 14 // MMD Address | |
1001 | * 3) Write reg 13 // MMD Data Command for MMD DEVAD | |
1002 | * 3) Write reg 14 // Write MMD data | |
1003 | */ | |
66ce7fb9 | 1004 | void phy_write_mmd_indirect(struct phy_device *phydev, int prtad, |
0c1d77df | 1005 | int devad, int addr, u32 data) |
a59a4d19 | 1006 | { |
0c1d77df | 1007 | struct phy_driver *phydrv = phydev->drv; |
a59a4d19 | 1008 | |
0c1d77df VB |
1009 | if (phydrv->write_mmd_indirect == NULL) { |
1010 | mmd_phy_indirect(phydev->bus, prtad, devad, addr); | |
1011 | ||
1012 | /* Write the data into MMD's selected register */ | |
1013 | phydev->bus->write(phydev->bus, addr, MII_MMD_DATA, data); | |
1014 | } else { | |
1015 | phydrv->write_mmd_indirect(phydev, prtad, devad, addr, data); | |
1016 | } | |
a59a4d19 | 1017 | } |
66ce7fb9 | 1018 | EXPORT_SYMBOL(phy_write_mmd_indirect); |
a59a4d19 | 1019 | |
a59a4d19 GC |
1020 | /** |
1021 | * phy_init_eee - init and check the EEE feature | |
1022 | * @phydev: target phy_device struct | |
1023 | * @clk_stop_enable: PHY may stop the clock during LPI | |
1024 | * | |
1025 | * Description: it checks if the Energy-Efficient Ethernet (EEE) | |
1026 | * is supported by looking at the MMD registers 3.20 and 7.60/61 | |
1027 | * and it programs the MMD register 3.0 setting the "Clock stop enable" | |
1028 | * bit if required. | |
1029 | */ | |
1030 | int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable) | |
1031 | { | |
a59a4d19 GC |
1032 | /* According to 802.3az,the EEE is supported only in full duplex-mode. |
1033 | * Also EEE feature is active when core is operating with MII, GMII | |
a9f63095 FF |
1034 | * or RGMII. Internal PHYs are also allowed to proceed and should |
1035 | * return an error if they do not support EEE. | |
a59a4d19 GC |
1036 | */ |
1037 | if ((phydev->duplex == DUPLEX_FULL) && | |
1038 | ((phydev->interface == PHY_INTERFACE_MODE_MII) || | |
1039 | (phydev->interface == PHY_INTERFACE_MODE_GMII) || | |
a9f63095 FF |
1040 | (phydev->interface == PHY_INTERFACE_MODE_RGMII) || |
1041 | phy_is_internal(phydev))) { | |
a59a4d19 GC |
1042 | int eee_lp, eee_cap, eee_adv; |
1043 | u32 lp, cap, adv; | |
4ae6e50c BH |
1044 | int status; |
1045 | unsigned int idx; | |
a59a4d19 GC |
1046 | |
1047 | /* Read phy status to properly get the right settings */ | |
1048 | status = phy_read_status(phydev); | |
1049 | if (status) | |
1050 | return status; | |
1051 | ||
1052 | /* First check if the EEE ability is supported */ | |
0c1d77df | 1053 | eee_cap = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE, |
a59a4d19 | 1054 | MDIO_MMD_PCS, phydev->addr); |
7a4cecf7 GC |
1055 | if (eee_cap <= 0) |
1056 | goto eee_exit_err; | |
a59a4d19 | 1057 | |
b32607dd | 1058 | cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap); |
a59a4d19 | 1059 | if (!cap) |
7a4cecf7 | 1060 | goto eee_exit_err; |
a59a4d19 GC |
1061 | |
1062 | /* Check which link settings negotiated and verify it in | |
1063 | * the EEE advertising registers. | |
1064 | */ | |
0c1d77df | 1065 | eee_lp = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE, |
a59a4d19 | 1066 | MDIO_MMD_AN, phydev->addr); |
7a4cecf7 GC |
1067 | if (eee_lp <= 0) |
1068 | goto eee_exit_err; | |
a59a4d19 | 1069 | |
0c1d77df | 1070 | eee_adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, |
a59a4d19 | 1071 | MDIO_MMD_AN, phydev->addr); |
7a4cecf7 GC |
1072 | if (eee_adv <= 0) |
1073 | goto eee_exit_err; | |
a59a4d19 | 1074 | |
b32607dd AB |
1075 | adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv); |
1076 | lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp); | |
a59a4d19 | 1077 | idx = phy_find_setting(phydev->speed, phydev->duplex); |
9a9c56cb | 1078 | if (!(lp & adv & settings[idx].setting)) |
7a4cecf7 | 1079 | goto eee_exit_err; |
a59a4d19 GC |
1080 | |
1081 | if (clk_stop_enable) { | |
1082 | /* Configure the PHY to stop receiving xMII | |
1083 | * clock while it is signaling LPI. | |
1084 | */ | |
0c1d77df | 1085 | int val = phy_read_mmd_indirect(phydev, MDIO_CTRL1, |
a59a4d19 GC |
1086 | MDIO_MMD_PCS, |
1087 | phydev->addr); | |
1088 | if (val < 0) | |
1089 | return val; | |
1090 | ||
1091 | val |= MDIO_PCS_CTRL1_CLKSTOP_EN; | |
0c1d77df VB |
1092 | phy_write_mmd_indirect(phydev, MDIO_CTRL1, |
1093 | MDIO_MMD_PCS, phydev->addr, | |
1094 | val); | |
a59a4d19 GC |
1095 | } |
1096 | ||
e62a768f | 1097 | return 0; /* EEE supported */ |
a59a4d19 | 1098 | } |
7a4cecf7 | 1099 | eee_exit_err: |
e62a768f | 1100 | return -EPROTONOSUPPORT; |
a59a4d19 GC |
1101 | } |
1102 | EXPORT_SYMBOL(phy_init_eee); | |
1103 | ||
1104 | /** | |
1105 | * phy_get_eee_err - report the EEE wake error count | |
1106 | * @phydev: target phy_device struct | |
1107 | * | |
1108 | * Description: it is to report the number of time where the PHY | |
1109 | * failed to complete its normal wake sequence. | |
1110 | */ | |
1111 | int phy_get_eee_err(struct phy_device *phydev) | |
1112 | { | |
0c1d77df | 1113 | return phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_WK_ERR, |
a59a4d19 | 1114 | MDIO_MMD_PCS, phydev->addr); |
a59a4d19 GC |
1115 | } |
1116 | EXPORT_SYMBOL(phy_get_eee_err); | |
1117 | ||
1118 | /** | |
1119 | * phy_ethtool_get_eee - get EEE supported and status | |
1120 | * @phydev: target phy_device struct | |
1121 | * @data: ethtool_eee data | |
1122 | * | |
1123 | * Description: it reportes the Supported/Advertisement/LP Advertisement | |
1124 | * capabilities. | |
1125 | */ | |
1126 | int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data) | |
1127 | { | |
1128 | int val; | |
1129 | ||
1130 | /* Get Supported EEE */ | |
0c1d77df | 1131 | val = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE, |
a59a4d19 GC |
1132 | MDIO_MMD_PCS, phydev->addr); |
1133 | if (val < 0) | |
1134 | return val; | |
b32607dd | 1135 | data->supported = mmd_eee_cap_to_ethtool_sup_t(val); |
a59a4d19 GC |
1136 | |
1137 | /* Get advertisement EEE */ | |
0c1d77df | 1138 | val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, |
a59a4d19 GC |
1139 | MDIO_MMD_AN, phydev->addr); |
1140 | if (val < 0) | |
1141 | return val; | |
b32607dd | 1142 | data->advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
a59a4d19 GC |
1143 | |
1144 | /* Get LP advertisement EEE */ | |
0c1d77df | 1145 | val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE, |
a59a4d19 GC |
1146 | MDIO_MMD_AN, phydev->addr); |
1147 | if (val < 0) | |
1148 | return val; | |
b32607dd | 1149 | data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
a59a4d19 GC |
1150 | |
1151 | return 0; | |
1152 | } | |
1153 | EXPORT_SYMBOL(phy_ethtool_get_eee); | |
1154 | ||
1155 | /** | |
1156 | * phy_ethtool_set_eee - set EEE supported and status | |
1157 | * @phydev: target phy_device struct | |
1158 | * @data: ethtool_eee data | |
1159 | * | |
1160 | * Description: it is to program the Advertisement EEE register. | |
1161 | */ | |
1162 | int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) | |
1163 | { | |
553fe92b | 1164 | int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised); |
a59a4d19 | 1165 | |
0c1d77df | 1166 | phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, |
a59a4d19 GC |
1167 | phydev->addr, val); |
1168 | ||
1169 | return 0; | |
1170 | } | |
1171 | EXPORT_SYMBOL(phy_ethtool_set_eee); | |
42e836eb MS |
1172 | |
1173 | int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) | |
1174 | { | |
1175 | if (phydev->drv->set_wol) | |
1176 | return phydev->drv->set_wol(phydev, wol); | |
1177 | ||
1178 | return -EOPNOTSUPP; | |
1179 | } | |
1180 | EXPORT_SYMBOL(phy_ethtool_set_wol); | |
1181 | ||
1182 | void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) | |
1183 | { | |
1184 | if (phydev->drv->get_wol) | |
1185 | phydev->drv->get_wol(phydev, wol); | |
1186 | } | |
1187 | EXPORT_SYMBOL(phy_ethtool_get_wol); |